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 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "elf/dwarf2.h"
36 #include "expression.h"
37 #include "filenames.h" /* for DOSish file names */
40 #include "complaints.h"
42 #include "dwarf2expr.h"
43 #include "dwarf2loc.h"
44 #include "cp-support.h"
50 #include "gdb_string.h"
51 #include "gdb_assert.h"
52 #include <sys/types.h>
54 /* A note on memory usage for this file.
56 At the present time, this code reads the debug info sections into
57 the objfile's objfile_obstack. A definite improvement for startup
58 time, on platforms which do not emit relocations for debug
59 sections, would be to use mmap instead. The object's complete
60 debug information is loaded into memory, partly to simplify
61 absolute DIE references.
63 Whether using obstacks or mmap, the sections should remain loaded
64 until the objfile is released, and pointers into the section data
65 can be used for any other data associated to the objfile (symbol
66 names, type names, location expressions to name a few). */
69 /* .debug_info header for a compilation unit
70 Because of alignment constraints, this structure has padding and cannot
71 be mapped directly onto the beginning of the .debug_info section. */
72 typedef struct comp_unit_header
74 unsigned int length; /* length of the .debug_info
76 unsigned short version; /* version number -- 2 for DWARF
78 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
79 unsigned char addr_size; /* byte size of an address -- 4 */
82 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
85 /* .debug_pubnames header
86 Because of alignment constraints, this structure has padding and cannot
87 be mapped directly onto the beginning of the .debug_info section. */
88 typedef struct pubnames_header
90 unsigned int length; /* length of the .debug_pubnames
92 unsigned char version; /* version number -- 2 for DWARF
94 unsigned int info_offset; /* offset into .debug_info section */
95 unsigned int info_size; /* byte size of .debug_info section
99 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
101 /* .debug_pubnames header
102 Because of alignment constraints, this structure has padding and cannot
103 be mapped directly onto the beginning of the .debug_info section. */
104 typedef struct aranges_header
106 unsigned int length; /* byte len of the .debug_aranges
108 unsigned short version; /* version number -- 2 for DWARF
110 unsigned int info_offset; /* offset into .debug_info section */
111 unsigned char addr_size; /* byte size of an address */
112 unsigned char seg_size; /* byte size of segment descriptor */
115 #define _ACTUAL_ARANGES_HEADER_SIZE 12
117 /* .debug_line statement program prologue
118 Because of alignment constraints, this structure has padding and cannot
119 be mapped directly onto the beginning of the .debug_info section. */
120 typedef struct statement_prologue
122 unsigned int total_length; /* byte length of the statement
124 unsigned short version; /* version number -- 2 for DWARF
126 unsigned int prologue_length; /* # bytes between prologue &
128 unsigned char minimum_instruction_length; /* byte size of
130 unsigned char default_is_stmt; /* initial value of is_stmt
133 unsigned char line_range;
134 unsigned char opcode_base; /* number assigned to first special
136 unsigned char *standard_opcode_lengths;
140 static const struct objfile_data *dwarf2_objfile_data_key;
142 struct dwarf2_per_objfile
144 /* Sizes of debugging sections. */
145 unsigned int info_size;
146 unsigned int abbrev_size;
147 unsigned int line_size;
148 unsigned int pubnames_size;
149 unsigned int aranges_size;
150 unsigned int loc_size;
151 unsigned int macinfo_size;
152 unsigned int str_size;
153 unsigned int ranges_size;
154 unsigned int frame_size;
155 unsigned int eh_frame_size;
157 /* Loaded data from the sections. */
158 gdb_byte *info_buffer;
159 gdb_byte *abbrev_buffer;
160 gdb_byte *line_buffer;
161 gdb_byte *str_buffer;
162 gdb_byte *macinfo_buffer;
163 gdb_byte *ranges_buffer;
164 gdb_byte *loc_buffer;
166 /* A list of all the compilation units. This is used to locate
167 the target compilation unit of a particular reference. */
168 struct dwarf2_per_cu_data **all_comp_units;
170 /* The number of compilation units in ALL_COMP_UNITS. */
173 /* A chain of compilation units that are currently read in, so that
174 they can be freed later. */
175 struct dwarf2_per_cu_data *read_in_chain;
177 /* A flag indicating wether this objfile has a section loaded at a
179 int has_section_at_zero;
182 static struct dwarf2_per_objfile *dwarf2_per_objfile;
184 static asection *dwarf_info_section;
185 static asection *dwarf_abbrev_section;
186 static asection *dwarf_line_section;
187 static asection *dwarf_pubnames_section;
188 static asection *dwarf_aranges_section;
189 static asection *dwarf_loc_section;
190 static asection *dwarf_macinfo_section;
191 static asection *dwarf_str_section;
192 static asection *dwarf_ranges_section;
193 asection *dwarf_frame_section;
194 asection *dwarf_eh_frame_section;
196 /* names of the debugging sections */
198 #define INFO_SECTION ".debug_info"
199 #define ABBREV_SECTION ".debug_abbrev"
200 #define LINE_SECTION ".debug_line"
201 #define PUBNAMES_SECTION ".debug_pubnames"
202 #define ARANGES_SECTION ".debug_aranges"
203 #define LOC_SECTION ".debug_loc"
204 #define MACINFO_SECTION ".debug_macinfo"
205 #define STR_SECTION ".debug_str"
206 #define RANGES_SECTION ".debug_ranges"
207 #define FRAME_SECTION ".debug_frame"
208 #define EH_FRAME_SECTION ".eh_frame"
210 /* local data types */
212 /* We hold several abbreviation tables in memory at the same time. */
213 #ifndef ABBREV_HASH_SIZE
214 #define ABBREV_HASH_SIZE 121
217 /* The data in a compilation unit header, after target2host
218 translation, looks like this. */
219 struct comp_unit_head
221 unsigned long length;
223 unsigned int abbrev_offset;
224 unsigned char addr_size;
225 unsigned char signed_addr_p;
227 /* Size of file offsets; either 4 or 8. */
228 unsigned int offset_size;
230 /* Size of the length field; either 4 or 12. */
231 unsigned int initial_length_size;
233 /* Offset to the first byte of this compilation unit header in the
234 .debug_info section, for resolving relative reference dies. */
237 /* Pointer to this compilation unit header in the .debug_info
239 gdb_byte *cu_head_ptr;
241 /* Pointer to the first die of this compilation unit. This will be
242 the first byte following the compilation unit header. */
243 gdb_byte *first_die_ptr;
245 /* Pointer to the next compilation unit header in the program. */
246 struct comp_unit_head *next;
248 /* Base address of this compilation unit. */
249 CORE_ADDR base_address;
251 /* Non-zero if base_address has been set. */
255 /* Fixed size for the DIE hash table. */
256 #ifndef REF_HASH_SIZE
257 #define REF_HASH_SIZE 1021
260 /* Internal state when decoding a particular compilation unit. */
263 /* The objfile containing this compilation unit. */
264 struct objfile *objfile;
266 /* The header of the compilation unit.
268 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
269 should logically be moved to the dwarf2_cu structure. */
270 struct comp_unit_head header;
272 struct function_range *first_fn, *last_fn, *cached_fn;
274 /* The language we are debugging. */
275 enum language language;
276 const struct language_defn *language_defn;
278 const char *producer;
280 /* The generic symbol table building routines have separate lists for
281 file scope symbols and all all other scopes (local scopes). So
282 we need to select the right one to pass to add_symbol_to_list().
283 We do it by keeping a pointer to the correct list in list_in_scope.
285 FIXME: The original dwarf code just treated the file scope as the
286 first local scope, and all other local scopes as nested local
287 scopes, and worked fine. Check to see if we really need to
288 distinguish these in buildsym.c. */
289 struct pending **list_in_scope;
291 /* DWARF abbreviation table associated with this compilation unit. */
292 struct abbrev_info **dwarf2_abbrevs;
294 /* Storage for the abbrev table. */
295 struct obstack abbrev_obstack;
297 /* Hash table holding all the loaded partial DIEs. */
300 /* Storage for things with the same lifetime as this read-in compilation
301 unit, including partial DIEs. */
302 struct obstack comp_unit_obstack;
304 /* When multiple dwarf2_cu structures are living in memory, this field
305 chains them all together, so that they can be released efficiently.
306 We will probably also want a generation counter so that most-recently-used
307 compilation units are cached... */
308 struct dwarf2_per_cu_data *read_in_chain;
310 /* Backchain to our per_cu entry if the tree has been built. */
311 struct dwarf2_per_cu_data *per_cu;
313 /* How many compilation units ago was this CU last referenced? */
316 /* A hash table of die offsets for following references. */
317 struct die_info *die_ref_table[REF_HASH_SIZE];
319 /* Full DIEs if read in. */
320 struct die_info *dies;
322 /* A set of pointers to dwarf2_per_cu_data objects for compilation
323 units referenced by this one. Only set during full symbol processing;
324 partial symbol tables do not have dependencies. */
327 /* Header data from the line table, during full symbol processing. */
328 struct line_header *line_header;
330 /* Mark used when releasing cached dies. */
331 unsigned int mark : 1;
333 /* This flag will be set if this compilation unit might include
334 inter-compilation-unit references. */
335 unsigned int has_form_ref_addr : 1;
337 /* This flag will be set if this compilation unit includes any
338 DW_TAG_namespace DIEs. If we know that there are explicit
339 DIEs for namespaces, we don't need to try to infer them
340 from mangled names. */
341 unsigned int has_namespace_info : 1;
344 /* Persistent data held for a compilation unit, even when not
345 processing it. We put a pointer to this structure in the
346 read_symtab_private field of the psymtab. If we encounter
347 inter-compilation-unit references, we also maintain a sorted
348 list of all compilation units. */
350 struct dwarf2_per_cu_data
352 /* The start offset and length of this compilation unit. 2**30-1
353 bytes should suffice to store the length of any compilation unit
354 - if it doesn't, GDB will fall over anyway. */
355 unsigned long offset;
356 unsigned long length : 30;
358 /* Flag indicating this compilation unit will be read in before
359 any of the current compilation units are processed. */
360 unsigned long queued : 1;
362 /* This flag will be set if we need to load absolutely all DIEs
363 for this compilation unit, instead of just the ones we think
364 are interesting. It gets set if we look for a DIE in the
365 hash table and don't find it. */
366 unsigned int load_all_dies : 1;
368 /* Set iff currently read in. */
369 struct dwarf2_cu *cu;
371 /* If full symbols for this CU have been read in, then this field
372 holds a map of DIE offsets to types. It isn't always possible
373 to reconstruct this information later, so we have to preserve
377 /* The partial symbol table associated with this compilation unit,
378 or NULL for partial units (which do not have an associated
380 struct partial_symtab *psymtab;
383 /* The line number information for a compilation unit (found in the
384 .debug_line section) begins with a "statement program header",
385 which contains the following information. */
388 unsigned int total_length;
389 unsigned short version;
390 unsigned int header_length;
391 unsigned char minimum_instruction_length;
392 unsigned char default_is_stmt;
394 unsigned char line_range;
395 unsigned char opcode_base;
397 /* standard_opcode_lengths[i] is the number of operands for the
398 standard opcode whose value is i. This means that
399 standard_opcode_lengths[0] is unused, and the last meaningful
400 element is standard_opcode_lengths[opcode_base - 1]. */
401 unsigned char *standard_opcode_lengths;
403 /* The include_directories table. NOTE! These strings are not
404 allocated with xmalloc; instead, they are pointers into
405 debug_line_buffer. If you try to free them, `free' will get
407 unsigned int num_include_dirs, include_dirs_size;
410 /* The file_names table. NOTE! These strings are not allocated
411 with xmalloc; instead, they are pointers into debug_line_buffer.
412 Don't try to free them directly. */
413 unsigned int num_file_names, file_names_size;
417 unsigned int dir_index;
418 unsigned int mod_time;
420 int included_p; /* Non-zero if referenced by the Line Number Program. */
421 struct symtab *symtab; /* The associated symbol table, if any. */
424 /* The start and end of the statement program following this
425 header. These point into dwarf2_per_objfile->line_buffer. */
426 gdb_byte *statement_program_start, *statement_program_end;
429 /* When we construct a partial symbol table entry we only
430 need this much information. */
431 struct partial_die_info
433 /* Offset of this DIE. */
436 /* DWARF-2 tag for this DIE. */
437 ENUM_BITFIELD(dwarf_tag) tag : 16;
439 /* Language code associated with this DIE. This is only used
440 for the compilation unit DIE. */
441 unsigned int language : 8;
443 /* Assorted flags describing the data found in this DIE. */
444 unsigned int has_children : 1;
445 unsigned int is_external : 1;
446 unsigned int is_declaration : 1;
447 unsigned int has_type : 1;
448 unsigned int has_specification : 1;
449 unsigned int has_stmt_list : 1;
450 unsigned int has_pc_info : 1;
452 /* Flag set if the SCOPE field of this structure has been
454 unsigned int scope_set : 1;
456 /* Flag set if the DIE has a byte_size attribute. */
457 unsigned int has_byte_size : 1;
459 /* The name of this DIE. Normally the value of DW_AT_name, but
460 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
465 /* The scope to prepend to our children. This is generally
466 allocated on the comp_unit_obstack, so will disappear
467 when this compilation unit leaves the cache. */
470 /* The location description associated with this DIE, if any. */
471 struct dwarf_block *locdesc;
473 /* If HAS_PC_INFO, the PC range associated with this DIE. */
477 /* Pointer into the info_buffer pointing at the target of
478 DW_AT_sibling, if any. */
481 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
482 DW_AT_specification (or DW_AT_abstract_origin or
484 unsigned int spec_offset;
486 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
487 unsigned int line_offset;
489 /* Pointers to this DIE's parent, first child, and next sibling,
491 struct partial_die_info *die_parent, *die_child, *die_sibling;
494 /* This data structure holds the information of an abbrev. */
497 unsigned int number; /* number identifying abbrev */
498 enum dwarf_tag tag; /* dwarf tag */
499 unsigned short has_children; /* boolean */
500 unsigned short num_attrs; /* number of attributes */
501 struct attr_abbrev *attrs; /* an array of attribute descriptions */
502 struct abbrev_info *next; /* next in chain */
507 enum dwarf_attribute name;
508 enum dwarf_form form;
511 /* This data structure holds a complete die structure. */
514 enum dwarf_tag tag; /* Tag indicating type of die */
515 unsigned int abbrev; /* Abbrev number */
516 unsigned int offset; /* Offset in .debug_info section */
517 unsigned int num_attrs; /* Number of attributes */
518 struct attribute *attrs; /* An array of attributes */
519 struct die_info *next_ref; /* Next die in ref hash table */
521 /* The dies in a compilation unit form an n-ary tree. PARENT
522 points to this die's parent; CHILD points to the first child of
523 this node; and all the children of a given node are chained
524 together via their SIBLING fields, terminated by a die whose
526 struct die_info *child; /* Its first child, if any. */
527 struct die_info *sibling; /* Its next sibling, if any. */
528 struct die_info *parent; /* Its parent, if any. */
530 struct type *type; /* Cached type information */
533 /* Attributes have a name and a value */
536 enum dwarf_attribute name;
537 enum dwarf_form form;
541 struct dwarf_block *blk;
549 struct function_range
552 CORE_ADDR lowpc, highpc;
554 struct function_range *next;
557 /* Get at parts of an attribute structure */
559 #define DW_STRING(attr) ((attr)->u.str)
560 #define DW_UNSND(attr) ((attr)->u.unsnd)
561 #define DW_BLOCK(attr) ((attr)->u.blk)
562 #define DW_SND(attr) ((attr)->u.snd)
563 #define DW_ADDR(attr) ((attr)->u.addr)
565 /* Blocks are a bunch of untyped bytes. */
572 #ifndef ATTR_ALLOC_CHUNK
573 #define ATTR_ALLOC_CHUNK 4
576 /* Allocate fields for structs, unions and enums in this size. */
577 #ifndef DW_FIELD_ALLOC_CHUNK
578 #define DW_FIELD_ALLOC_CHUNK 4
581 /* A zeroed version of a partial die for initialization purposes. */
582 static struct partial_die_info zeroed_partial_die;
584 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
585 but this would require a corresponding change in unpack_field_as_long
587 static int bits_per_byte = 8;
589 /* The routines that read and process dies for a C struct or C++ class
590 pass lists of data member fields and lists of member function fields
591 in an instance of a field_info structure, as defined below. */
594 /* List of data member and baseclasses fields. */
597 struct nextfield *next;
604 /* Number of fields. */
607 /* Number of baseclasses. */
610 /* Set if the accesibility of one of the fields is not public. */
611 int non_public_fields;
613 /* Member function fields array, entries are allocated in the order they
614 are encountered in the object file. */
617 struct nextfnfield *next;
618 struct fn_field fnfield;
622 /* Member function fieldlist array, contains name of possibly overloaded
623 member function, number of overloaded member functions and a pointer
624 to the head of the member function field chain. */
629 struct nextfnfield *head;
633 /* Number of entries in the fnfieldlists array. */
637 /* One item on the queue of compilation units to read in full symbols
639 struct dwarf2_queue_item
641 struct dwarf2_per_cu_data *per_cu;
642 struct dwarf2_queue_item *next;
645 /* The current queue. */
646 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
648 /* Loaded secondary compilation units are kept in memory until they
649 have not been referenced for the processing of this many
650 compilation units. Set this to zero to disable caching. Cache
651 sizes of up to at least twenty will improve startup time for
652 typical inter-CU-reference binaries, at an obvious memory cost. */
653 static int dwarf2_max_cache_age = 5;
655 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
656 struct cmd_list_element *c, const char *value)
658 fprintf_filtered (file, _("\
659 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
664 /* Various complaints about symbol reading that don't abort the process */
667 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
669 complaint (&symfile_complaints,
670 _("statement list doesn't fit in .debug_line section"));
674 dwarf2_debug_line_missing_file_complaint (void)
676 complaint (&symfile_complaints,
677 _(".debug_line section has line data without a file"));
681 dwarf2_complex_location_expr_complaint (void)
683 complaint (&symfile_complaints, _("location expression too complex"));
687 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
690 complaint (&symfile_complaints,
691 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
696 dwarf2_macros_too_long_complaint (void)
698 complaint (&symfile_complaints,
699 _("macro info runs off end of `.debug_macinfo' section"));
703 dwarf2_macro_malformed_definition_complaint (const char *arg1)
705 complaint (&symfile_complaints,
706 _("macro debug info contains a malformed macro definition:\n`%s'"),
711 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
713 complaint (&symfile_complaints,
714 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
717 /* local function prototypes */
719 static void dwarf2_locate_sections (bfd *, asection *, void *);
722 static void dwarf2_build_psymtabs_easy (struct objfile *, int);
725 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
728 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
729 struct partial_die_info *,
730 struct partial_symtab *);
732 static void dwarf2_build_psymtabs_hard (struct objfile *, int);
734 static void scan_partial_symbols (struct partial_die_info *,
735 CORE_ADDR *, CORE_ADDR *,
738 static void add_partial_symbol (struct partial_die_info *,
741 static int pdi_needs_namespace (enum dwarf_tag tag);
743 static void add_partial_namespace (struct partial_die_info *pdi,
744 CORE_ADDR *lowpc, CORE_ADDR *highpc,
745 struct dwarf2_cu *cu);
747 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
748 struct dwarf2_cu *cu);
750 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
753 struct dwarf2_cu *cu);
755 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
757 static void psymtab_to_symtab_1 (struct partial_symtab *);
759 gdb_byte *dwarf2_read_section (struct objfile *, asection *);
761 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
763 static void dwarf2_free_abbrev_table (void *);
765 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
768 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
771 static struct partial_die_info *load_partial_dies (bfd *, gdb_byte *, int,
774 static gdb_byte *read_partial_die (struct partial_die_info *,
775 struct abbrev_info *abbrev, unsigned int,
776 bfd *, gdb_byte *, struct dwarf2_cu *);
778 static struct partial_die_info *find_partial_die (unsigned long,
781 static void fixup_partial_die (struct partial_die_info *,
784 static gdb_byte *read_full_die (struct die_info **, bfd *, gdb_byte *,
785 struct dwarf2_cu *, int *);
787 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
788 bfd *, gdb_byte *, struct dwarf2_cu *);
790 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
791 bfd *, gdb_byte *, struct dwarf2_cu *);
793 static unsigned int read_1_byte (bfd *, gdb_byte *);
795 static int read_1_signed_byte (bfd *, gdb_byte *);
797 static unsigned int read_2_bytes (bfd *, gdb_byte *);
799 static unsigned int read_4_bytes (bfd *, gdb_byte *);
801 static unsigned long read_8_bytes (bfd *, gdb_byte *);
803 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
806 static LONGEST read_initial_length (bfd *, gdb_byte *,
807 struct comp_unit_head *, unsigned int *);
809 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
812 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
814 static char *read_string (bfd *, gdb_byte *, unsigned int *);
816 static char *read_indirect_string (bfd *, gdb_byte *,
817 const struct comp_unit_head *,
820 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
822 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
824 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
826 static void set_cu_language (unsigned int, struct dwarf2_cu *);
828 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
831 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
832 struct dwarf2_cu *cu);
834 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
836 static struct die_info *die_specification (struct die_info *die,
839 static void free_line_header (struct line_header *lh);
841 static void add_file_name (struct line_header *, char *, unsigned int,
842 unsigned int, unsigned int);
844 static struct line_header *(dwarf_decode_line_header
845 (unsigned int offset,
846 bfd *abfd, struct dwarf2_cu *cu));
848 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
849 struct dwarf2_cu *, struct partial_symtab *);
851 static void dwarf2_start_subfile (char *, char *, char *);
853 static struct symbol *new_symbol (struct die_info *, struct type *,
856 static void dwarf2_const_value (struct attribute *, struct symbol *,
859 static void dwarf2_const_value_data (struct attribute *attr,
863 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
865 static struct type *die_containing_type (struct die_info *,
868 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
870 static void read_type_die (struct die_info *, struct dwarf2_cu *);
872 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
874 static char *typename_concat (struct obstack *,
879 static void read_typedef (struct die_info *, struct dwarf2_cu *);
881 static void read_base_type (struct die_info *, struct dwarf2_cu *);
883 static void read_subrange_type (struct die_info *die, struct dwarf2_cu *cu);
885 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
887 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
889 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
891 static int dwarf2_get_pc_bounds (struct die_info *,
892 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *);
894 static void get_scope_pc_bounds (struct die_info *,
895 CORE_ADDR *, CORE_ADDR *,
898 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
899 CORE_ADDR, struct dwarf2_cu *);
901 static void dwarf2_add_field (struct field_info *, struct die_info *,
904 static void dwarf2_attach_fields_to_type (struct field_info *,
905 struct type *, struct dwarf2_cu *);
907 static void dwarf2_add_member_fn (struct field_info *,
908 struct die_info *, struct type *,
911 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
912 struct type *, struct dwarf2_cu *);
914 static void read_structure_type (struct die_info *, struct dwarf2_cu *);
916 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
918 static char *determine_class_name (struct die_info *die, struct dwarf2_cu *cu);
920 static void read_common_block (struct die_info *, struct dwarf2_cu *);
922 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
924 static const char *namespace_name (struct die_info *die,
925 int *is_anonymous, struct dwarf2_cu *);
927 static void read_enumeration_type (struct die_info *, struct dwarf2_cu *);
929 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
931 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
933 static void read_array_type (struct die_info *, struct dwarf2_cu *);
935 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
938 static void read_tag_pointer_type (struct die_info *, struct dwarf2_cu *);
940 static void read_tag_ptr_to_member_type (struct die_info *,
943 static void read_tag_reference_type (struct die_info *, struct dwarf2_cu *);
945 static void read_tag_const_type (struct die_info *, struct dwarf2_cu *);
947 static void read_tag_volatile_type (struct die_info *, struct dwarf2_cu *);
949 static void read_tag_string_type (struct die_info *, struct dwarf2_cu *);
951 static void read_subroutine_type (struct die_info *, struct dwarf2_cu *);
953 static struct die_info *read_comp_unit (gdb_byte *, bfd *, struct dwarf2_cu *);
955 static struct die_info *read_die_and_children (gdb_byte *info_ptr, bfd *abfd,
957 gdb_byte **new_info_ptr,
958 struct die_info *parent);
960 static struct die_info *read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd,
962 gdb_byte **new_info_ptr,
963 struct die_info *parent);
965 static void free_die_list (struct die_info *);
967 static void process_die (struct die_info *, struct dwarf2_cu *);
969 static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
971 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
973 static struct die_info *dwarf2_extension (struct die_info *die,
976 static char *dwarf_tag_name (unsigned int);
978 static char *dwarf_attr_name (unsigned int);
980 static char *dwarf_form_name (unsigned int);
982 static char *dwarf_stack_op_name (unsigned int);
984 static char *dwarf_bool_name (unsigned int);
986 static char *dwarf_type_encoding_name (unsigned int);
989 static char *dwarf_cfi_name (unsigned int);
991 struct die_info *copy_die (struct die_info *);
994 static struct die_info *sibling_die (struct die_info *);
996 static void dump_die (struct die_info *);
998 static void dump_die_list (struct die_info *);
1000 static void store_in_ref_table (unsigned int, struct die_info *,
1001 struct dwarf2_cu *);
1003 static unsigned int dwarf2_get_ref_die_offset (struct attribute *,
1004 struct dwarf2_cu *);
1006 static int dwarf2_get_attr_constant_value (struct attribute *, int);
1008 static struct die_info *follow_die_ref (struct die_info *,
1010 struct dwarf2_cu *);
1012 /* memory allocation interface */
1014 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1016 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1018 static struct die_info *dwarf_alloc_die (void);
1020 static void initialize_cu_func_list (struct dwarf2_cu *);
1022 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1023 struct dwarf2_cu *);
1025 static void dwarf_decode_macros (struct line_header *, unsigned int,
1026 char *, bfd *, struct dwarf2_cu *);
1028 static int attr_form_is_block (struct attribute *);
1030 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1032 struct dwarf2_cu *cu);
1034 static gdb_byte *skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev,
1035 struct dwarf2_cu *cu);
1037 static void free_stack_comp_unit (void *);
1039 static hashval_t partial_die_hash (const void *item);
1041 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1043 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1044 (unsigned long offset, struct objfile *objfile);
1046 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1047 (unsigned long offset, struct objfile *objfile);
1049 static void free_one_comp_unit (void *);
1051 static void free_cached_comp_units (void *);
1053 static void age_cached_comp_units (void);
1055 static void free_one_cached_comp_unit (void *);
1057 static void set_die_type (struct die_info *, struct type *,
1058 struct dwarf2_cu *);
1060 static void reset_die_and_siblings_types (struct die_info *,
1061 struct dwarf2_cu *);
1063 static void create_all_comp_units (struct objfile *);
1065 static struct dwarf2_cu *load_full_comp_unit (struct dwarf2_per_cu_data *,
1068 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1070 static void dwarf2_add_dependence (struct dwarf2_cu *,
1071 struct dwarf2_per_cu_data *);
1073 static void dwarf2_mark (struct dwarf2_cu *);
1075 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1077 static void read_set_type (struct die_info *, struct dwarf2_cu *);
1080 /* Try to locate the sections we need for DWARF 2 debugging
1081 information and return true if we have enough to do something. */
1084 dwarf2_has_info (struct objfile *objfile)
1086 struct dwarf2_per_objfile *data;
1088 /* Initialize per-objfile state. */
1089 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1090 memset (data, 0, sizeof (*data));
1091 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1092 dwarf2_per_objfile = data;
1094 dwarf_info_section = 0;
1095 dwarf_abbrev_section = 0;
1096 dwarf_line_section = 0;
1097 dwarf_str_section = 0;
1098 dwarf_macinfo_section = 0;
1099 dwarf_frame_section = 0;
1100 dwarf_eh_frame_section = 0;
1101 dwarf_ranges_section = 0;
1102 dwarf_loc_section = 0;
1104 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1105 return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
1108 /* This function is mapped across the sections and remembers the
1109 offset and size of each of the debugging sections we are interested
1113 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1115 if (strcmp (sectp->name, INFO_SECTION) == 0)
1117 dwarf2_per_objfile->info_size = bfd_get_section_size (sectp);
1118 dwarf_info_section = sectp;
1120 else if (strcmp (sectp->name, ABBREV_SECTION) == 0)
1122 dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp);
1123 dwarf_abbrev_section = sectp;
1125 else if (strcmp (sectp->name, LINE_SECTION) == 0)
1127 dwarf2_per_objfile->line_size = bfd_get_section_size (sectp);
1128 dwarf_line_section = sectp;
1130 else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0)
1132 dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp);
1133 dwarf_pubnames_section = sectp;
1135 else if (strcmp (sectp->name, ARANGES_SECTION) == 0)
1137 dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp);
1138 dwarf_aranges_section = sectp;
1140 else if (strcmp (sectp->name, LOC_SECTION) == 0)
1142 dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp);
1143 dwarf_loc_section = sectp;
1145 else if (strcmp (sectp->name, MACINFO_SECTION) == 0)
1147 dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp);
1148 dwarf_macinfo_section = sectp;
1150 else if (strcmp (sectp->name, STR_SECTION) == 0)
1152 dwarf2_per_objfile->str_size = bfd_get_section_size (sectp);
1153 dwarf_str_section = sectp;
1155 else if (strcmp (sectp->name, FRAME_SECTION) == 0)
1157 dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp);
1158 dwarf_frame_section = sectp;
1160 else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0)
1162 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1163 if (aflag & SEC_HAS_CONTENTS)
1165 dwarf2_per_objfile->eh_frame_size = bfd_get_section_size (sectp);
1166 dwarf_eh_frame_section = sectp;
1169 else if (strcmp (sectp->name, RANGES_SECTION) == 0)
1171 dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp);
1172 dwarf_ranges_section = sectp;
1175 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1176 && bfd_section_vma (abfd, sectp) == 0)
1177 dwarf2_per_objfile->has_section_at_zero = 1;
1180 /* Build a partial symbol table. */
1183 dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
1185 /* We definitely need the .debug_info and .debug_abbrev sections */
1187 dwarf2_per_objfile->info_buffer = dwarf2_read_section (objfile, dwarf_info_section);
1188 dwarf2_per_objfile->abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section);
1190 if (dwarf_line_section)
1191 dwarf2_per_objfile->line_buffer = dwarf2_read_section (objfile, dwarf_line_section);
1193 dwarf2_per_objfile->line_buffer = NULL;
1195 if (dwarf_str_section)
1196 dwarf2_per_objfile->str_buffer = dwarf2_read_section (objfile, dwarf_str_section);
1198 dwarf2_per_objfile->str_buffer = NULL;
1200 if (dwarf_macinfo_section)
1201 dwarf2_per_objfile->macinfo_buffer = dwarf2_read_section (objfile,
1202 dwarf_macinfo_section);
1204 dwarf2_per_objfile->macinfo_buffer = NULL;
1206 if (dwarf_ranges_section)
1207 dwarf2_per_objfile->ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section);
1209 dwarf2_per_objfile->ranges_buffer = NULL;
1211 if (dwarf_loc_section)
1212 dwarf2_per_objfile->loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section);
1214 dwarf2_per_objfile->loc_buffer = NULL;
1217 || (objfile->global_psymbols.size == 0
1218 && objfile->static_psymbols.size == 0))
1220 init_psymbol_list (objfile, 1024);
1224 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1226 /* Things are significantly easier if we have .debug_aranges and
1227 .debug_pubnames sections */
1229 dwarf2_build_psymtabs_easy (objfile, mainline);
1233 /* only test this case for now */
1235 /* In this case we have to work a bit harder */
1236 dwarf2_build_psymtabs_hard (objfile, mainline);
1241 /* Build the partial symbol table from the information in the
1242 .debug_pubnames and .debug_aranges sections. */
1245 dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
1247 bfd *abfd = objfile->obfd;
1248 char *aranges_buffer, *pubnames_buffer;
1249 char *aranges_ptr, *pubnames_ptr;
1250 unsigned int entry_length, version, info_offset, info_size;
1252 pubnames_buffer = dwarf2_read_section (objfile,
1253 dwarf_pubnames_section);
1254 pubnames_ptr = pubnames_buffer;
1255 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size)
1257 struct comp_unit_head cu_header;
1258 unsigned int bytes_read;
1260 entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
1262 pubnames_ptr += bytes_read;
1263 version = read_1_byte (abfd, pubnames_ptr);
1265 info_offset = read_4_bytes (abfd, pubnames_ptr);
1267 info_size = read_4_bytes (abfd, pubnames_ptr);
1271 aranges_buffer = dwarf2_read_section (objfile,
1272 dwarf_aranges_section);
1277 /* Read in the comp unit header information from the debug_info at
1281 read_comp_unit_head (struct comp_unit_head *cu_header,
1282 gdb_byte *info_ptr, bfd *abfd)
1285 unsigned int bytes_read;
1286 cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
1288 info_ptr += bytes_read;
1289 cu_header->version = read_2_bytes (abfd, info_ptr);
1291 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1293 info_ptr += bytes_read;
1294 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1296 signed_addr = bfd_get_sign_extend_vma (abfd);
1297 if (signed_addr < 0)
1298 internal_error (__FILE__, __LINE__,
1299 _("read_comp_unit_head: dwarf from non elf file"));
1300 cu_header->signed_addr_p = signed_addr;
1305 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1308 gdb_byte *beg_of_comp_unit = info_ptr;
1310 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1312 if (header->version != 2 && header->version != 3)
1313 error (_("Dwarf Error: wrong version in compilation unit header "
1314 "(is %d, should be %d) [in module %s]"), header->version,
1315 2, bfd_get_filename (abfd));
1317 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev_size)
1318 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1319 "(offset 0x%lx + 6) [in module %s]"),
1320 (long) header->abbrev_offset,
1321 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1322 bfd_get_filename (abfd));
1324 if (beg_of_comp_unit + header->length + header->initial_length_size
1325 > dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
1326 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1327 "(offset 0x%lx + 0) [in module %s]"),
1328 (long) header->length,
1329 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1330 bfd_get_filename (abfd));
1335 /* Allocate a new partial symtab for file named NAME and mark this new
1336 partial symtab as being an include of PST. */
1339 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1340 struct objfile *objfile)
1342 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1344 subpst->section_offsets = pst->section_offsets;
1345 subpst->textlow = 0;
1346 subpst->texthigh = 0;
1348 subpst->dependencies = (struct partial_symtab **)
1349 obstack_alloc (&objfile->objfile_obstack,
1350 sizeof (struct partial_symtab *));
1351 subpst->dependencies[0] = pst;
1352 subpst->number_of_dependencies = 1;
1354 subpst->globals_offset = 0;
1355 subpst->n_global_syms = 0;
1356 subpst->statics_offset = 0;
1357 subpst->n_static_syms = 0;
1358 subpst->symtab = NULL;
1359 subpst->read_symtab = pst->read_symtab;
1362 /* No private part is necessary for include psymtabs. This property
1363 can be used to differentiate between such include psymtabs and
1364 the regular ones. */
1365 subpst->read_symtab_private = NULL;
1368 /* Read the Line Number Program data and extract the list of files
1369 included by the source file represented by PST. Build an include
1370 partial symtab for each of these included files.
1372 This procedure assumes that there *is* a Line Number Program in
1373 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1374 before calling this procedure. */
1377 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1378 struct partial_die_info *pdi,
1379 struct partial_symtab *pst)
1381 struct objfile *objfile = cu->objfile;
1382 bfd *abfd = objfile->obfd;
1383 struct line_header *lh;
1385 lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu);
1387 return; /* No linetable, so no includes. */
1389 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1391 free_line_header (lh);
1395 /* Build the partial symbol table by doing a quick pass through the
1396 .debug_info and .debug_abbrev sections. */
1399 dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
1401 /* Instead of reading this into a big buffer, we should probably use
1402 mmap() on architectures that support it. (FIXME) */
1403 bfd *abfd = objfile->obfd;
1405 gdb_byte *beg_of_comp_unit;
1406 struct partial_die_info comp_unit_die;
1407 struct partial_symtab *pst;
1408 struct cleanup *back_to;
1409 CORE_ADDR lowpc, highpc, baseaddr;
1411 info_ptr = dwarf2_per_objfile->info_buffer;
1413 /* Any cached compilation units will be linked by the per-objfile
1414 read_in_chain. Make sure to free them when we're done. */
1415 back_to = make_cleanup (free_cached_comp_units, NULL);
1417 create_all_comp_units (objfile);
1419 /* Since the objects we're extracting from .debug_info vary in
1420 length, only the individual functions to extract them (like
1421 read_comp_unit_head and load_partial_die) can really know whether
1422 the buffer is large enough to hold another complete object.
1424 At the moment, they don't actually check that. If .debug_info
1425 holds just one extra byte after the last compilation unit's dies,
1426 then read_comp_unit_head will happily read off the end of the
1427 buffer. read_partial_die is similarly casual. Those functions
1430 For this loop condition, simply checking whether there's any data
1431 left at all should be sufficient. */
1432 while (info_ptr < (dwarf2_per_objfile->info_buffer
1433 + dwarf2_per_objfile->info_size))
1435 struct cleanup *back_to_inner;
1436 struct dwarf2_cu cu;
1437 struct abbrev_info *abbrev;
1438 unsigned int bytes_read;
1439 struct dwarf2_per_cu_data *this_cu;
1441 beg_of_comp_unit = info_ptr;
1443 memset (&cu, 0, sizeof (cu));
1445 obstack_init (&cu.comp_unit_obstack);
1447 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1449 cu.objfile = objfile;
1450 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd);
1452 /* Complete the cu_header */
1453 cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1454 cu.header.first_die_ptr = info_ptr;
1455 cu.header.cu_head_ptr = beg_of_comp_unit;
1457 cu.list_in_scope = &file_symbols;
1459 /* Read the abbrevs for this compilation unit into a table */
1460 dwarf2_read_abbrevs (abfd, &cu);
1461 make_cleanup (dwarf2_free_abbrev_table, &cu);
1463 this_cu = dwarf2_find_comp_unit (cu.header.offset, objfile);
1465 /* Read the compilation unit die */
1466 abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu);
1467 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
1468 abfd, info_ptr, &cu);
1470 if (comp_unit_die.tag == DW_TAG_partial_unit)
1472 info_ptr = (beg_of_comp_unit + cu.header.length
1473 + cu.header.initial_length_size);
1474 do_cleanups (back_to_inner);
1478 /* Set the language we're debugging */
1479 set_cu_language (comp_unit_die.language, &cu);
1481 /* Allocate a new partial symbol table structure */
1482 pst = start_psymtab_common (objfile, objfile->section_offsets,
1483 comp_unit_die.name ? comp_unit_die.name : "",
1484 comp_unit_die.lowpc,
1485 objfile->global_psymbols.next,
1486 objfile->static_psymbols.next);
1488 if (comp_unit_die.dirname)
1489 pst->dirname = xstrdup (comp_unit_die.dirname);
1491 pst->read_symtab_private = (char *) this_cu;
1493 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1495 /* Store the function that reads in the rest of the symbol table */
1496 pst->read_symtab = dwarf2_psymtab_to_symtab;
1498 /* If this compilation unit was already read in, free the
1499 cached copy in order to read it in again. This is
1500 necessary because we skipped some symbols when we first
1501 read in the compilation unit (see load_partial_dies).
1502 This problem could be avoided, but the benefit is
1504 if (this_cu->cu != NULL)
1505 free_one_cached_comp_unit (this_cu->cu);
1507 cu.per_cu = this_cu;
1509 /* Note that this is a pointer to our stack frame, being
1510 added to a global data structure. It will be cleaned up
1511 in free_stack_comp_unit when we finish with this
1512 compilation unit. */
1515 this_cu->psymtab = pst;
1517 /* Check if comp unit has_children.
1518 If so, read the rest of the partial symbols from this comp unit.
1519 If not, there's no more debug_info for this comp unit. */
1520 if (comp_unit_die.has_children)
1522 struct partial_die_info *first_die;
1524 lowpc = ((CORE_ADDR) -1);
1525 highpc = ((CORE_ADDR) 0);
1527 first_die = load_partial_dies (abfd, info_ptr, 1, &cu);
1529 scan_partial_symbols (first_die, &lowpc, &highpc, &cu);
1531 /* If we didn't find a lowpc, set it to highpc to avoid
1532 complaints from `maint check'. */
1533 if (lowpc == ((CORE_ADDR) -1))
1536 /* If the compilation unit didn't have an explicit address range,
1537 then use the information extracted from its child dies. */
1538 if (! comp_unit_die.has_pc_info)
1540 comp_unit_die.lowpc = lowpc;
1541 comp_unit_die.highpc = highpc;
1544 pst->textlow = comp_unit_die.lowpc + baseaddr;
1545 pst->texthigh = comp_unit_die.highpc + baseaddr;
1547 pst->n_global_syms = objfile->global_psymbols.next -
1548 (objfile->global_psymbols.list + pst->globals_offset);
1549 pst->n_static_syms = objfile->static_psymbols.next -
1550 (objfile->static_psymbols.list + pst->statics_offset);
1551 sort_pst_symbols (pst);
1553 /* If there is already a psymtab or symtab for a file of this
1554 name, remove it. (If there is a symtab, more drastic things
1555 also happen.) This happens in VxWorks. */
1556 free_named_symtabs (pst->filename);
1558 info_ptr = beg_of_comp_unit + cu.header.length
1559 + cu.header.initial_length_size;
1561 if (comp_unit_die.has_stmt_list)
1563 /* Get the list of files included in the current compilation unit,
1564 and build a psymtab for each of them. */
1565 dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst);
1568 do_cleanups (back_to_inner);
1570 do_cleanups (back_to);
1573 /* Load the DIEs for a secondary CU into memory. */
1576 load_comp_unit (struct dwarf2_per_cu_data *this_cu, struct objfile *objfile)
1578 bfd *abfd = objfile->obfd;
1579 gdb_byte *info_ptr, *beg_of_comp_unit;
1580 struct partial_die_info comp_unit_die;
1581 struct dwarf2_cu *cu;
1582 struct abbrev_info *abbrev;
1583 unsigned int bytes_read;
1584 struct cleanup *back_to;
1586 info_ptr = dwarf2_per_objfile->info_buffer + this_cu->offset;
1587 beg_of_comp_unit = info_ptr;
1589 cu = xmalloc (sizeof (struct dwarf2_cu));
1590 memset (cu, 0, sizeof (struct dwarf2_cu));
1592 obstack_init (&cu->comp_unit_obstack);
1594 cu->objfile = objfile;
1595 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr, abfd);
1597 /* Complete the cu_header. */
1598 cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1599 cu->header.first_die_ptr = info_ptr;
1600 cu->header.cu_head_ptr = beg_of_comp_unit;
1602 /* Read the abbrevs for this compilation unit into a table. */
1603 dwarf2_read_abbrevs (abfd, cu);
1604 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
1606 /* Read the compilation unit die. */
1607 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
1608 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
1609 abfd, info_ptr, cu);
1611 /* Set the language we're debugging. */
1612 set_cu_language (comp_unit_die.language, cu);
1614 /* Link this compilation unit into the compilation unit tree. */
1616 cu->per_cu = this_cu;
1618 /* Check if comp unit has_children.
1619 If so, read the rest of the partial symbols from this comp unit.
1620 If not, there's no more debug_info for this comp unit. */
1621 if (comp_unit_die.has_children)
1622 load_partial_dies (abfd, info_ptr, 0, cu);
1624 do_cleanups (back_to);
1627 /* Create a list of all compilation units in OBJFILE. We do this only
1628 if an inter-comp-unit reference is found; presumably if there is one,
1629 there will be many, and one will occur early in the .debug_info section.
1630 So there's no point in building this list incrementally. */
1633 create_all_comp_units (struct objfile *objfile)
1637 struct dwarf2_per_cu_data **all_comp_units;
1638 gdb_byte *info_ptr = dwarf2_per_objfile->info_buffer;
1642 all_comp_units = xmalloc (n_allocated
1643 * sizeof (struct dwarf2_per_cu_data *));
1645 while (info_ptr < dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
1647 struct comp_unit_head cu_header;
1648 gdb_byte *beg_of_comp_unit;
1649 struct dwarf2_per_cu_data *this_cu;
1650 unsigned long offset;
1651 unsigned int bytes_read;
1653 offset = info_ptr - dwarf2_per_objfile->info_buffer;
1655 /* Read just enough information to find out where the next
1656 compilation unit is. */
1657 cu_header.initial_length_size = 0;
1658 cu_header.length = read_initial_length (objfile->obfd, info_ptr,
1659 &cu_header, &bytes_read);
1661 /* Save the compilation unit for later lookup. */
1662 this_cu = obstack_alloc (&objfile->objfile_obstack,
1663 sizeof (struct dwarf2_per_cu_data));
1664 memset (this_cu, 0, sizeof (*this_cu));
1665 this_cu->offset = offset;
1666 this_cu->length = cu_header.length + cu_header.initial_length_size;
1668 if (n_comp_units == n_allocated)
1671 all_comp_units = xrealloc (all_comp_units,
1673 * sizeof (struct dwarf2_per_cu_data *));
1675 all_comp_units[n_comp_units++] = this_cu;
1677 info_ptr = info_ptr + this_cu->length;
1680 dwarf2_per_objfile->all_comp_units
1681 = obstack_alloc (&objfile->objfile_obstack,
1682 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
1683 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
1684 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
1685 xfree (all_comp_units);
1686 dwarf2_per_objfile->n_comp_units = n_comp_units;
1689 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1690 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1694 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
1695 CORE_ADDR *highpc, struct dwarf2_cu *cu)
1697 struct objfile *objfile = cu->objfile;
1698 bfd *abfd = objfile->obfd;
1699 struct partial_die_info *pdi;
1701 /* Now, march along the PDI's, descending into ones which have
1702 interesting children but skipping the children of the other ones,
1703 until we reach the end of the compilation unit. */
1709 fixup_partial_die (pdi, cu);
1711 /* Anonymous namespaces have no name but have interesting
1712 children, so we need to look at them. Ditto for anonymous
1715 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
1716 || pdi->tag == DW_TAG_enumeration_type)
1720 case DW_TAG_subprogram:
1721 if (pdi->has_pc_info)
1723 if (pdi->lowpc < *lowpc)
1725 *lowpc = pdi->lowpc;
1727 if (pdi->highpc > *highpc)
1729 *highpc = pdi->highpc;
1731 if (!pdi->is_declaration)
1733 add_partial_symbol (pdi, cu);
1737 case DW_TAG_variable:
1738 case DW_TAG_typedef:
1739 case DW_TAG_union_type:
1740 if (!pdi->is_declaration)
1742 add_partial_symbol (pdi, cu);
1745 case DW_TAG_class_type:
1746 case DW_TAG_structure_type:
1747 if (!pdi->is_declaration)
1749 add_partial_symbol (pdi, cu);
1752 case DW_TAG_enumeration_type:
1753 if (!pdi->is_declaration)
1754 add_partial_enumeration (pdi, cu);
1756 case DW_TAG_base_type:
1757 case DW_TAG_subrange_type:
1758 /* File scope base type definitions are added to the partial
1760 add_partial_symbol (pdi, cu);
1762 case DW_TAG_namespace:
1763 add_partial_namespace (pdi, lowpc, highpc, cu);
1770 /* If the die has a sibling, skip to the sibling. */
1772 pdi = pdi->die_sibling;
1776 /* Functions used to compute the fully scoped name of a partial DIE.
1778 Normally, this is simple. For C++, the parent DIE's fully scoped
1779 name is concatenated with "::" and the partial DIE's name. For
1780 Java, the same thing occurs except that "." is used instead of "::".
1781 Enumerators are an exception; they use the scope of their parent
1782 enumeration type, i.e. the name of the enumeration type is not
1783 prepended to the enumerator.
1785 There are two complexities. One is DW_AT_specification; in this
1786 case "parent" means the parent of the target of the specification,
1787 instead of the direct parent of the DIE. The other is compilers
1788 which do not emit DW_TAG_namespace; in this case we try to guess
1789 the fully qualified name of structure types from their members'
1790 linkage names. This must be done using the DIE's children rather
1791 than the children of any DW_AT_specification target. We only need
1792 to do this for structures at the top level, i.e. if the target of
1793 any DW_AT_specification (if any; otherwise the DIE itself) does not
1796 /* Compute the scope prefix associated with PDI's parent, in
1797 compilation unit CU. The result will be allocated on CU's
1798 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1799 field. NULL is returned if no prefix is necessary. */
1801 partial_die_parent_scope (struct partial_die_info *pdi,
1802 struct dwarf2_cu *cu)
1804 char *grandparent_scope;
1805 struct partial_die_info *parent, *real_pdi;
1807 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1808 then this means the parent of the specification DIE. */
1811 while (real_pdi->has_specification)
1812 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
1814 parent = real_pdi->die_parent;
1818 if (parent->scope_set)
1819 return parent->scope;
1821 fixup_partial_die (parent, cu);
1823 grandparent_scope = partial_die_parent_scope (parent, cu);
1825 if (parent->tag == DW_TAG_namespace
1826 || parent->tag == DW_TAG_structure_type
1827 || parent->tag == DW_TAG_class_type
1828 || parent->tag == DW_TAG_union_type)
1830 if (grandparent_scope == NULL)
1831 parent->scope = parent->name;
1833 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
1836 else if (parent->tag == DW_TAG_enumeration_type)
1837 /* Enumerators should not get the name of the enumeration as a prefix. */
1838 parent->scope = grandparent_scope;
1841 /* FIXME drow/2004-04-01: What should we be doing with
1842 function-local names? For partial symbols, we should probably be
1844 complaint (&symfile_complaints,
1845 _("unhandled containing DIE tag %d for DIE at %d"),
1846 parent->tag, pdi->offset);
1847 parent->scope = grandparent_scope;
1850 parent->scope_set = 1;
1851 return parent->scope;
1854 /* Return the fully scoped name associated with PDI, from compilation unit
1855 CU. The result will be allocated with malloc. */
1857 partial_die_full_name (struct partial_die_info *pdi,
1858 struct dwarf2_cu *cu)
1862 parent_scope = partial_die_parent_scope (pdi, cu);
1863 if (parent_scope == NULL)
1866 return typename_concat (NULL, parent_scope, pdi->name, cu);
1870 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
1872 struct objfile *objfile = cu->objfile;
1874 char *actual_name = NULL;
1875 const char *my_prefix;
1876 const struct partial_symbol *psym = NULL;
1878 int built_actual_name = 0;
1880 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1882 if (pdi_needs_namespace (pdi->tag))
1884 actual_name = partial_die_full_name (pdi, cu);
1886 built_actual_name = 1;
1889 if (actual_name == NULL)
1890 actual_name = pdi->name;
1894 case DW_TAG_subprogram:
1895 if (pdi->is_external)
1897 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1898 mst_text, objfile); */
1899 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1900 VAR_DOMAIN, LOC_BLOCK,
1901 &objfile->global_psymbols,
1902 0, pdi->lowpc + baseaddr,
1903 cu->language, objfile);
1907 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1908 mst_file_text, objfile); */
1909 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1910 VAR_DOMAIN, LOC_BLOCK,
1911 &objfile->static_psymbols,
1912 0, pdi->lowpc + baseaddr,
1913 cu->language, objfile);
1916 case DW_TAG_variable:
1917 if (pdi->is_external)
1920 Don't enter into the minimal symbol tables as there is
1921 a minimal symbol table entry from the ELF symbols already.
1922 Enter into partial symbol table if it has a location
1923 descriptor or a type.
1924 If the location descriptor is missing, new_symbol will create
1925 a LOC_UNRESOLVED symbol, the address of the variable will then
1926 be determined from the minimal symbol table whenever the variable
1928 The address for the partial symbol table entry is not
1929 used by GDB, but it comes in handy for debugging partial symbol
1933 addr = decode_locdesc (pdi->locdesc, cu);
1934 if (pdi->locdesc || pdi->has_type)
1935 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1936 VAR_DOMAIN, LOC_STATIC,
1937 &objfile->global_psymbols,
1939 cu->language, objfile);
1943 /* Static Variable. Skip symbols without location descriptors. */
1944 if (pdi->locdesc == NULL)
1946 if (built_actual_name)
1947 xfree (actual_name);
1950 addr = decode_locdesc (pdi->locdesc, cu);
1951 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1952 mst_file_data, objfile); */
1953 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1954 VAR_DOMAIN, LOC_STATIC,
1955 &objfile->static_psymbols,
1957 cu->language, objfile);
1960 case DW_TAG_typedef:
1961 case DW_TAG_base_type:
1962 case DW_TAG_subrange_type:
1963 add_psymbol_to_list (actual_name, strlen (actual_name),
1964 VAR_DOMAIN, LOC_TYPEDEF,
1965 &objfile->static_psymbols,
1966 0, (CORE_ADDR) 0, cu->language, objfile);
1968 case DW_TAG_namespace:
1969 add_psymbol_to_list (actual_name, strlen (actual_name),
1970 VAR_DOMAIN, LOC_TYPEDEF,
1971 &objfile->global_psymbols,
1972 0, (CORE_ADDR) 0, cu->language, objfile);
1974 case DW_TAG_class_type:
1975 case DW_TAG_structure_type:
1976 case DW_TAG_union_type:
1977 case DW_TAG_enumeration_type:
1978 /* Skip external references. The DWARF standard says in the section
1979 about "Structure, Union, and Class Type Entries": "An incomplete
1980 structure, union or class type is represented by a structure,
1981 union or class entry that does not have a byte size attribute
1982 and that has a DW_AT_declaration attribute." */
1983 if (!pdi->has_byte_size && pdi->is_declaration)
1985 if (built_actual_name)
1986 xfree (actual_name);
1990 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
1991 static vs. global. */
1992 add_psymbol_to_list (actual_name, strlen (actual_name),
1993 STRUCT_DOMAIN, LOC_TYPEDEF,
1994 (cu->language == language_cplus
1995 || cu->language == language_java)
1996 ? &objfile->global_psymbols
1997 : &objfile->static_psymbols,
1998 0, (CORE_ADDR) 0, cu->language, objfile);
2000 if (cu->language == language_cplus
2001 || cu->language == language_java
2002 || cu->language == language_ada)
2004 /* For C++ and Java, these implicitly act as typedefs as well. */
2005 add_psymbol_to_list (actual_name, strlen (actual_name),
2006 VAR_DOMAIN, LOC_TYPEDEF,
2007 &objfile->global_psymbols,
2008 0, (CORE_ADDR) 0, cu->language, objfile);
2011 case DW_TAG_enumerator:
2012 add_psymbol_to_list (actual_name, strlen (actual_name),
2013 VAR_DOMAIN, LOC_CONST,
2014 (cu->language == language_cplus
2015 || cu->language == language_java)
2016 ? &objfile->global_psymbols
2017 : &objfile->static_psymbols,
2018 0, (CORE_ADDR) 0, cu->language, objfile);
2024 /* Check to see if we should scan the name for possible namespace
2025 info. Only do this if this is C++, if we don't have namespace
2026 debugging info in the file, if the psym is of an appropriate type
2027 (otherwise we'll have psym == NULL), and if we actually had a
2028 mangled name to begin with. */
2030 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2031 cases which do not set PSYM above? */
2033 if (cu->language == language_cplus
2034 && cu->has_namespace_info == 0
2036 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
2037 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
2040 if (built_actual_name)
2041 xfree (actual_name);
2044 /* Determine whether a die of type TAG living in a C++ class or
2045 namespace needs to have the name of the scope prepended to the
2046 name listed in the die. */
2049 pdi_needs_namespace (enum dwarf_tag tag)
2053 case DW_TAG_namespace:
2054 case DW_TAG_typedef:
2055 case DW_TAG_class_type:
2056 case DW_TAG_structure_type:
2057 case DW_TAG_union_type:
2058 case DW_TAG_enumeration_type:
2059 case DW_TAG_enumerator:
2066 /* Read a partial die corresponding to a namespace; also, add a symbol
2067 corresponding to that namespace to the symbol table. NAMESPACE is
2068 the name of the enclosing namespace. */
2071 add_partial_namespace (struct partial_die_info *pdi,
2072 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2073 struct dwarf2_cu *cu)
2075 struct objfile *objfile = cu->objfile;
2077 /* Add a symbol for the namespace. */
2079 add_partial_symbol (pdi, cu);
2081 /* Now scan partial symbols in that namespace. */
2083 if (pdi->has_children)
2084 scan_partial_symbols (pdi->die_child, lowpc, highpc, cu);
2087 /* See if we can figure out if the class lives in a namespace. We do
2088 this by looking for a member function; its demangled name will
2089 contain namespace info, if there is any. */
2092 guess_structure_name (struct partial_die_info *struct_pdi,
2093 struct dwarf2_cu *cu)
2095 if ((cu->language == language_cplus
2096 || cu->language == language_java)
2097 && cu->has_namespace_info == 0
2098 && struct_pdi->has_children)
2100 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2101 what template types look like, because the demangler
2102 frequently doesn't give the same name as the debug info. We
2103 could fix this by only using the demangled name to get the
2104 prefix (but see comment in read_structure_type). */
2106 struct partial_die_info *child_pdi = struct_pdi->die_child;
2107 struct partial_die_info *real_pdi;
2109 /* If this DIE (this DIE's specification, if any) has a parent, then
2110 we should not do this. We'll prepend the parent's fully qualified
2111 name when we create the partial symbol. */
2113 real_pdi = struct_pdi;
2114 while (real_pdi->has_specification)
2115 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2117 if (real_pdi->die_parent != NULL)
2120 while (child_pdi != NULL)
2122 if (child_pdi->tag == DW_TAG_subprogram)
2124 char *actual_class_name
2125 = language_class_name_from_physname (cu->language_defn,
2127 if (actual_class_name != NULL)
2130 = obsavestring (actual_class_name,
2131 strlen (actual_class_name),
2132 &cu->comp_unit_obstack);
2133 xfree (actual_class_name);
2138 child_pdi = child_pdi->die_sibling;
2143 /* Read a partial die corresponding to an enumeration type. */
2146 add_partial_enumeration (struct partial_die_info *enum_pdi,
2147 struct dwarf2_cu *cu)
2149 struct objfile *objfile = cu->objfile;
2150 bfd *abfd = objfile->obfd;
2151 struct partial_die_info *pdi;
2153 if (enum_pdi->name != NULL)
2154 add_partial_symbol (enum_pdi, cu);
2156 pdi = enum_pdi->die_child;
2159 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2160 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2162 add_partial_symbol (pdi, cu);
2163 pdi = pdi->die_sibling;
2167 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2168 Return the corresponding abbrev, or NULL if the number is zero (indicating
2169 an empty DIE). In either case *BYTES_READ will be set to the length of
2170 the initial number. */
2172 static struct abbrev_info *
2173 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2174 struct dwarf2_cu *cu)
2176 bfd *abfd = cu->objfile->obfd;
2177 unsigned int abbrev_number;
2178 struct abbrev_info *abbrev;
2180 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2182 if (abbrev_number == 0)
2185 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2188 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2189 bfd_get_filename (abfd));
2195 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2196 pointer to the end of a series of DIEs, terminated by an empty
2197 DIE. Any children of the skipped DIEs will also be skipped. */
2200 skip_children (gdb_byte *info_ptr, struct dwarf2_cu *cu)
2202 struct abbrev_info *abbrev;
2203 unsigned int bytes_read;
2207 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2209 return info_ptr + bytes_read;
2211 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
2215 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2216 should point just after the initial uleb128 of a DIE, and the
2217 abbrev corresponding to that skipped uleb128 should be passed in
2218 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2222 skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev,
2223 struct dwarf2_cu *cu)
2225 unsigned int bytes_read;
2226 struct attribute attr;
2227 bfd *abfd = cu->objfile->obfd;
2228 unsigned int form, i;
2230 for (i = 0; i < abbrev->num_attrs; i++)
2232 /* The only abbrev we care about is DW_AT_sibling. */
2233 if (abbrev->attrs[i].name == DW_AT_sibling)
2235 read_attribute (&attr, &abbrev->attrs[i],
2236 abfd, info_ptr, cu);
2237 if (attr.form == DW_FORM_ref_addr)
2238 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2240 return dwarf2_per_objfile->info_buffer
2241 + dwarf2_get_ref_die_offset (&attr, cu);
2244 /* If it isn't DW_AT_sibling, skip this attribute. */
2245 form = abbrev->attrs[i].form;
2250 case DW_FORM_ref_addr:
2251 info_ptr += cu->header.addr_size;
2270 case DW_FORM_string:
2271 read_string (abfd, info_ptr, &bytes_read);
2272 info_ptr += bytes_read;
2275 info_ptr += cu->header.offset_size;
2278 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2279 info_ptr += bytes_read;
2281 case DW_FORM_block1:
2282 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2284 case DW_FORM_block2:
2285 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2287 case DW_FORM_block4:
2288 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2292 case DW_FORM_ref_udata:
2293 info_ptr = skip_leb128 (abfd, info_ptr);
2295 case DW_FORM_indirect:
2296 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2297 info_ptr += bytes_read;
2298 /* We need to continue parsing from here, so just go back to
2300 goto skip_attribute;
2303 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2304 dwarf_form_name (form),
2305 bfd_get_filename (abfd));
2309 if (abbrev->has_children)
2310 return skip_children (info_ptr, cu);
2315 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2316 the next DIE after ORIG_PDI. */
2319 locate_pdi_sibling (struct partial_die_info *orig_pdi, gdb_byte *info_ptr,
2320 bfd *abfd, struct dwarf2_cu *cu)
2322 /* Do we know the sibling already? */
2324 if (orig_pdi->sibling)
2325 return orig_pdi->sibling;
2327 /* Are there any children to deal with? */
2329 if (!orig_pdi->has_children)
2332 /* Skip the children the long way. */
2334 return skip_children (info_ptr, cu);
2337 /* Expand this partial symbol table into a full symbol table. */
2340 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2342 /* FIXME: This is barely more than a stub. */
2347 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2353 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2354 gdb_flush (gdb_stdout);
2357 /* Restore our global data. */
2358 dwarf2_per_objfile = objfile_data (pst->objfile,
2359 dwarf2_objfile_data_key);
2361 psymtab_to_symtab_1 (pst);
2363 /* Finish up the debug error message. */
2365 printf_filtered (_("done.\n"));
2370 /* Add PER_CU to the queue. */
2373 queue_comp_unit (struct dwarf2_per_cu_data *per_cu)
2375 struct dwarf2_queue_item *item;
2378 item = xmalloc (sizeof (*item));
2379 item->per_cu = per_cu;
2382 if (dwarf2_queue == NULL)
2383 dwarf2_queue = item;
2385 dwarf2_queue_tail->next = item;
2387 dwarf2_queue_tail = item;
2390 /* Process the queue. */
2393 process_queue (struct objfile *objfile)
2395 struct dwarf2_queue_item *item, *next_item;
2397 /* Initially, there is just one item on the queue. Load its DIEs,
2398 and the DIEs of any other compilation units it requires,
2401 for (item = dwarf2_queue; item != NULL; item = item->next)
2403 /* Read in this compilation unit. This may add new items to
2404 the end of the queue. */
2405 load_full_comp_unit (item->per_cu, objfile);
2407 item->per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
2408 dwarf2_per_objfile->read_in_chain = item->per_cu;
2410 /* If this compilation unit has already had full symbols created,
2411 reset the TYPE fields in each DIE. */
2412 if (item->per_cu->type_hash)
2413 reset_die_and_siblings_types (item->per_cu->cu->dies,
2417 /* Now everything left on the queue needs to be read in. Process
2418 them, one at a time, removing from the queue as we finish. */
2419 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
2421 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
2422 process_full_comp_unit (item->per_cu);
2424 item->per_cu->queued = 0;
2425 next_item = item->next;
2429 dwarf2_queue_tail = NULL;
2432 /* Free all allocated queue entries. This function only releases anything if
2433 an error was thrown; if the queue was processed then it would have been
2434 freed as we went along. */
2437 dwarf2_release_queue (void *dummy)
2439 struct dwarf2_queue_item *item, *last;
2441 item = dwarf2_queue;
2444 /* Anything still marked queued is likely to be in an
2445 inconsistent state, so discard it. */
2446 if (item->per_cu->queued)
2448 if (item->per_cu->cu != NULL)
2449 free_one_cached_comp_unit (item->per_cu->cu);
2450 item->per_cu->queued = 0;
2458 dwarf2_queue = dwarf2_queue_tail = NULL;
2461 /* Read in full symbols for PST, and anything it depends on. */
2464 psymtab_to_symtab_1 (struct partial_symtab *pst)
2466 struct dwarf2_per_cu_data *per_cu;
2467 struct cleanup *back_to;
2470 for (i = 0; i < pst->number_of_dependencies; i++)
2471 if (!pst->dependencies[i]->readin)
2473 /* Inform about additional files that need to be read in. */
2476 /* FIXME: i18n: Need to make this a single string. */
2477 fputs_filtered (" ", gdb_stdout);
2479 fputs_filtered ("and ", gdb_stdout);
2481 printf_filtered ("%s...", pst->dependencies[i]->filename);
2482 wrap_here (""); /* Flush output */
2483 gdb_flush (gdb_stdout);
2485 psymtab_to_symtab_1 (pst->dependencies[i]);
2488 per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
2492 /* It's an include file, no symbols to read for it.
2493 Everything is in the parent symtab. */
2498 back_to = make_cleanup (dwarf2_release_queue, NULL);
2500 queue_comp_unit (per_cu);
2502 process_queue (pst->objfile);
2504 /* Age the cache, releasing compilation units that have not
2505 been used recently. */
2506 age_cached_comp_units ();
2508 do_cleanups (back_to);
2511 /* Load the DIEs associated with PST and PER_CU into memory. */
2513 static struct dwarf2_cu *
2514 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
2516 bfd *abfd = objfile->obfd;
2517 struct dwarf2_cu *cu;
2518 unsigned long offset;
2520 struct cleanup *back_to, *free_cu_cleanup;
2521 struct attribute *attr;
2524 /* Set local variables from the partial symbol table info. */
2525 offset = per_cu->offset;
2527 info_ptr = dwarf2_per_objfile->info_buffer + offset;
2529 cu = xmalloc (sizeof (struct dwarf2_cu));
2530 memset (cu, 0, sizeof (struct dwarf2_cu));
2532 /* If an error occurs while loading, release our storage. */
2533 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
2535 cu->objfile = objfile;
2537 /* read in the comp_unit header */
2538 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
2540 /* Read the abbrevs for this compilation unit */
2541 dwarf2_read_abbrevs (abfd, cu);
2542 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2544 cu->header.offset = offset;
2546 cu->per_cu = per_cu;
2549 /* We use this obstack for block values in dwarf_alloc_block. */
2550 obstack_init (&cu->comp_unit_obstack);
2552 cu->dies = read_comp_unit (info_ptr, abfd, cu);
2554 /* We try not to read any attributes in this function, because not
2555 all objfiles needed for references have been loaded yet, and symbol
2556 table processing isn't initialized. But we have to set the CU language,
2557 or we won't be able to build types correctly. */
2558 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
2560 set_cu_language (DW_UNSND (attr), cu);
2562 set_cu_language (language_minimal, cu);
2564 do_cleanups (back_to);
2566 /* We've successfully allocated this compilation unit. Let our caller
2567 clean it up when finished with it. */
2568 discard_cleanups (free_cu_cleanup);
2573 /* Generate full symbol information for PST and CU, whose DIEs have
2574 already been loaded into memory. */
2577 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
2579 struct partial_symtab *pst = per_cu->psymtab;
2580 struct dwarf2_cu *cu = per_cu->cu;
2581 struct objfile *objfile = pst->objfile;
2582 bfd *abfd = objfile->obfd;
2583 CORE_ADDR lowpc, highpc;
2584 struct symtab *symtab;
2585 struct cleanup *back_to;
2586 struct attribute *attr;
2589 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2591 /* We're in the global namespace. */
2592 processing_current_prefix = "";
2595 back_to = make_cleanup (really_free_pendings, NULL);
2597 cu->list_in_scope = &file_symbols;
2599 /* Find the base address of the compilation unit for range lists and
2600 location lists. It will normally be specified by DW_AT_low_pc.
2601 In DWARF-3 draft 4, the base address could be overridden by
2602 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2603 compilation units with discontinuous ranges. */
2605 cu->header.base_known = 0;
2606 cu->header.base_address = 0;
2608 attr = dwarf2_attr (cu->dies, DW_AT_entry_pc, cu);
2611 cu->header.base_address = DW_ADDR (attr);
2612 cu->header.base_known = 1;
2616 attr = dwarf2_attr (cu->dies, DW_AT_low_pc, cu);
2619 cu->header.base_address = DW_ADDR (attr);
2620 cu->header.base_known = 1;
2624 /* Do line number decoding in read_file_scope () */
2625 process_die (cu->dies, cu);
2627 /* Some compilers don't define a DW_AT_high_pc attribute for the
2628 compilation unit. If the DW_AT_high_pc is missing, synthesize
2629 it, by scanning the DIE's below the compilation unit. */
2630 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
2632 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
2634 /* Set symtab language to language from DW_AT_language.
2635 If the compilation is from a C file generated by language preprocessors,
2636 do not set the language if it was already deduced by start_subfile. */
2638 && !(cu->language == language_c && symtab->language != language_c))
2640 symtab->language = cu->language;
2642 pst->symtab = symtab;
2645 do_cleanups (back_to);
2648 /* Process a die and its children. */
2651 process_die (struct die_info *die, struct dwarf2_cu *cu)
2655 case DW_TAG_padding:
2657 case DW_TAG_compile_unit:
2658 read_file_scope (die, cu);
2660 case DW_TAG_subprogram:
2661 read_subroutine_type (die, cu);
2662 read_func_scope (die, cu);
2664 case DW_TAG_inlined_subroutine:
2665 /* FIXME: These are ignored for now.
2666 They could be used to set breakpoints on all inlined instances
2667 of a function and make GDB `next' properly over inlined functions. */
2669 case DW_TAG_lexical_block:
2670 case DW_TAG_try_block:
2671 case DW_TAG_catch_block:
2672 read_lexical_block_scope (die, cu);
2674 case DW_TAG_class_type:
2675 case DW_TAG_structure_type:
2676 case DW_TAG_union_type:
2677 read_structure_type (die, cu);
2678 process_structure_scope (die, cu);
2680 case DW_TAG_enumeration_type:
2681 read_enumeration_type (die, cu);
2682 process_enumeration_scope (die, cu);
2685 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2686 a symbol or process any children. Therefore it doesn't do anything
2687 that won't be done on-demand by read_type_die. */
2688 case DW_TAG_subroutine_type:
2689 read_subroutine_type (die, cu);
2691 case DW_TAG_set_type:
2692 read_set_type (die, cu);
2694 case DW_TAG_array_type:
2695 read_array_type (die, cu);
2697 case DW_TAG_pointer_type:
2698 read_tag_pointer_type (die, cu);
2700 case DW_TAG_ptr_to_member_type:
2701 read_tag_ptr_to_member_type (die, cu);
2703 case DW_TAG_reference_type:
2704 read_tag_reference_type (die, cu);
2706 case DW_TAG_string_type:
2707 read_tag_string_type (die, cu);
2711 case DW_TAG_base_type:
2712 read_base_type (die, cu);
2713 /* Add a typedef symbol for the type definition, if it has a
2715 new_symbol (die, die->type, cu);
2717 case DW_TAG_subrange_type:
2718 read_subrange_type (die, cu);
2719 /* Add a typedef symbol for the type definition, if it has a
2721 new_symbol (die, die->type, cu);
2723 case DW_TAG_common_block:
2724 read_common_block (die, cu);
2726 case DW_TAG_common_inclusion:
2728 case DW_TAG_namespace:
2729 processing_has_namespace_info = 1;
2730 read_namespace (die, cu);
2732 case DW_TAG_imported_declaration:
2733 case DW_TAG_imported_module:
2734 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2735 information contained in these. DW_TAG_imported_declaration
2736 dies shouldn't have children; DW_TAG_imported_module dies
2737 shouldn't in the C++ case, but conceivably could in the
2738 Fortran case, so we'll have to replace this gdb_assert if
2739 Fortran compilers start generating that info. */
2740 processing_has_namespace_info = 1;
2741 gdb_assert (die->child == NULL);
2744 new_symbol (die, NULL, cu);
2750 initialize_cu_func_list (struct dwarf2_cu *cu)
2752 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
2756 free_cu_line_header (void *arg)
2758 struct dwarf2_cu *cu = arg;
2760 free_line_header (cu->line_header);
2761 cu->line_header = NULL;
2765 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
2767 struct objfile *objfile = cu->objfile;
2768 struct comp_unit_head *cu_header = &cu->header;
2769 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2770 CORE_ADDR lowpc = ((CORE_ADDR) -1);
2771 CORE_ADDR highpc = ((CORE_ADDR) 0);
2772 struct attribute *attr;
2774 char *comp_dir = NULL;
2775 struct die_info *child_die;
2776 bfd *abfd = objfile->obfd;
2777 struct line_header *line_header = 0;
2780 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2782 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
2784 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2785 from finish_block. */
2786 if (lowpc == ((CORE_ADDR) -1))
2791 /* Find the filename. Do not use dwarf2_name here, since the filename
2792 is not a source language identifier. */
2793 attr = dwarf2_attr (die, DW_AT_name, cu);
2796 name = DW_STRING (attr);
2799 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
2801 comp_dir = DW_STRING (attr);
2802 else if (name != NULL && IS_ABSOLUTE_PATH (name))
2804 comp_dir = ldirname (name);
2805 if (comp_dir != NULL)
2806 make_cleanup (xfree, comp_dir);
2808 if (comp_dir != NULL)
2810 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2811 directory, get rid of it. */
2812 char *cp = strchr (comp_dir, ':');
2814 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
2821 attr = dwarf2_attr (die, DW_AT_language, cu);
2824 set_cu_language (DW_UNSND (attr), cu);
2827 attr = dwarf2_attr (die, DW_AT_producer, cu);
2829 cu->producer = DW_STRING (attr);
2831 /* We assume that we're processing GCC output. */
2832 processing_gcc_compilation = 2;
2834 start_symtab (name, comp_dir, lowpc);
2835 record_debugformat ("DWARF 2");
2836 record_producer (cu->producer);
2838 initialize_cu_func_list (cu);
2840 /* Decode line number information if present. We do this before
2841 processing child DIEs, so that the line header table is available
2842 for DW_AT_decl_file. */
2843 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2846 unsigned int line_offset = DW_UNSND (attr);
2847 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
2850 cu->line_header = line_header;
2851 make_cleanup (free_cu_line_header, cu);
2852 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
2856 /* Process all dies in compilation unit. */
2857 if (die->child != NULL)
2859 child_die = die->child;
2860 while (child_die && child_die->tag)
2862 process_die (child_die, cu);
2863 child_die = sibling_die (child_die);
2867 /* Decode macro information, if present. Dwarf 2 macro information
2868 refers to information in the line number info statement program
2869 header, so we can only read it if we've read the header
2871 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
2872 if (attr && line_header)
2874 unsigned int macro_offset = DW_UNSND (attr);
2875 dwarf_decode_macros (line_header, macro_offset,
2876 comp_dir, abfd, cu);
2878 do_cleanups (back_to);
2882 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
2883 struct dwarf2_cu *cu)
2885 struct function_range *thisfn;
2887 thisfn = (struct function_range *)
2888 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
2889 thisfn->name = name;
2890 thisfn->lowpc = lowpc;
2891 thisfn->highpc = highpc;
2892 thisfn->seen_line = 0;
2893 thisfn->next = NULL;
2895 if (cu->last_fn == NULL)
2896 cu->first_fn = thisfn;
2898 cu->last_fn->next = thisfn;
2900 cu->last_fn = thisfn;
2904 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
2906 struct objfile *objfile = cu->objfile;
2907 struct context_stack *new;
2910 struct die_info *child_die;
2911 struct attribute *attr;
2913 const char *previous_prefix = processing_current_prefix;
2914 struct cleanup *back_to = NULL;
2916 struct block *block;
2918 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2920 name = dwarf2_linkage_name (die, cu);
2922 /* Ignore functions with missing or empty names and functions with
2923 missing or invalid low and high pc attributes. */
2924 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
2927 if (cu->language == language_cplus
2928 || cu->language == language_java)
2930 struct die_info *spec_die = die_specification (die, cu);
2932 /* NOTE: carlton/2004-01-23: We have to be careful in the
2933 presence of DW_AT_specification. For example, with GCC 3.4,
2938 // Definition of N::foo.
2942 then we'll have a tree of DIEs like this:
2944 1: DW_TAG_compile_unit
2945 2: DW_TAG_namespace // N
2946 3: DW_TAG_subprogram // declaration of N::foo
2947 4: DW_TAG_subprogram // definition of N::foo
2948 DW_AT_specification // refers to die #3
2950 Thus, when processing die #4, we have to pretend that we're
2951 in the context of its DW_AT_specification, namely the contex
2954 if (spec_die != NULL)
2956 char *specification_prefix = determine_prefix (spec_die, cu);
2957 processing_current_prefix = specification_prefix;
2958 back_to = make_cleanup (xfree, specification_prefix);
2965 /* Record the function range for dwarf_decode_lines. */
2966 add_to_cu_func_list (name, lowpc, highpc, cu);
2968 new = push_context (0, lowpc);
2969 new->name = new_symbol (die, die->type, cu);
2971 /* If there is a location expression for DW_AT_frame_base, record
2973 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
2975 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2976 expression is being recorded directly in the function's symbol
2977 and not in a separate frame-base object. I guess this hack is
2978 to avoid adding some sort of frame-base adjunct/annex to the
2979 function's symbol :-(. The problem with doing this is that it
2980 results in a function symbol with a location expression that
2981 has nothing to do with the location of the function, ouch! The
2982 relationship should be: a function's symbol has-a frame base; a
2983 frame-base has-a location expression. */
2984 dwarf2_symbol_mark_computed (attr, new->name, cu);
2986 cu->list_in_scope = &local_symbols;
2988 if (die->child != NULL)
2990 child_die = die->child;
2991 while (child_die && child_die->tag)
2993 process_die (child_die, cu);
2994 child_die = sibling_die (child_die);
2998 new = pop_context ();
2999 /* Make a block for the local symbols within. */
3000 block = finish_block (new->name, &local_symbols, new->old_blocks,
3001 lowpc, highpc, objfile);
3003 /* If we have address ranges, record them. */
3004 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3006 /* In C++, we can have functions nested inside functions (e.g., when
3007 a function declares a class that has methods). This means that
3008 when we finish processing a function scope, we may need to go
3009 back to building a containing block's symbol lists. */
3010 local_symbols = new->locals;
3011 param_symbols = new->params;
3013 /* If we've finished processing a top-level function, subsequent
3014 symbols go in the file symbol list. */
3015 if (outermost_context_p ())
3016 cu->list_in_scope = &file_symbols;
3018 processing_current_prefix = previous_prefix;
3019 if (back_to != NULL)
3020 do_cleanups (back_to);
3023 /* Process all the DIES contained within a lexical block scope. Start
3024 a new scope, process the dies, and then close the scope. */
3027 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
3029 struct objfile *objfile = cu->objfile;
3030 struct context_stack *new;
3031 CORE_ADDR lowpc, highpc;
3032 struct die_info *child_die;
3035 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3037 /* Ignore blocks with missing or invalid low and high pc attributes. */
3038 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3039 as multiple lexical blocks? Handling children in a sane way would
3040 be nasty. Might be easier to properly extend generic blocks to
3042 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
3047 push_context (0, lowpc);
3048 if (die->child != NULL)
3050 child_die = die->child;
3051 while (child_die && child_die->tag)
3053 process_die (child_die, cu);
3054 child_die = sibling_die (child_die);
3057 new = pop_context ();
3059 if (local_symbols != NULL)
3062 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
3065 /* Note that recording ranges after traversing children, as we
3066 do here, means that recording a parent's ranges entails
3067 walking across all its children's ranges as they appear in
3068 the address map, which is quadratic behavior.
3070 It would be nicer to record the parent's ranges before
3071 traversing its children, simply overriding whatever you find
3072 there. But since we don't even decide whether to create a
3073 block until after we've traversed its children, that's hard
3075 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3077 local_symbols = new->locals;
3080 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3081 Return 1 if the attributes are present and valid, otherwise, return 0. */
3084 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
3085 CORE_ADDR *high_return, struct dwarf2_cu *cu)
3087 struct objfile *objfile = cu->objfile;
3088 struct comp_unit_head *cu_header = &cu->header;
3089 bfd *obfd = objfile->obfd;
3090 unsigned int addr_size = cu_header->addr_size;
3091 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3092 /* Base address selection entry. */
3102 found_base = cu_header->base_known;
3103 base = cu_header->base_address;
3105 if (offset >= dwarf2_per_objfile->ranges_size)
3107 complaint (&symfile_complaints,
3108 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3112 buffer = dwarf2_per_objfile->ranges_buffer + offset;
3114 /* Read in the largest possible address. */
3115 marker = read_address (obfd, buffer, cu, &dummy);
3116 if ((marker & mask) == mask)
3118 /* If we found the largest possible address, then
3119 read the base address. */
3120 base = read_address (obfd, buffer + addr_size, cu, &dummy);
3121 buffer += 2 * addr_size;
3122 offset += 2 * addr_size;
3130 CORE_ADDR range_beginning, range_end;
3132 range_beginning = read_address (obfd, buffer, cu, &dummy);
3133 buffer += addr_size;
3134 range_end = read_address (obfd, buffer, cu, &dummy);
3135 buffer += addr_size;
3136 offset += 2 * addr_size;
3138 /* An end of list marker is a pair of zero addresses. */
3139 if (range_beginning == 0 && range_end == 0)
3140 /* Found the end of list entry. */
3143 /* Each base address selection entry is a pair of 2 values.
3144 The first is the largest possible address, the second is
3145 the base address. Check for a base address here. */
3146 if ((range_beginning & mask) == mask)
3148 /* If we found the largest possible address, then
3149 read the base address. */
3150 base = read_address (obfd, buffer + addr_size, cu, &dummy);
3157 /* We have no valid base address for the ranges
3159 complaint (&symfile_complaints,
3160 _("Invalid .debug_ranges data (no base address)"));
3164 range_beginning += base;
3167 /* FIXME: This is recording everything as a low-high
3168 segment of consecutive addresses. We should have a
3169 data structure for discontiguous block ranges
3173 low = range_beginning;
3179 if (range_beginning < low)
3180 low = range_beginning;
3181 if (range_end > high)
3187 /* If the first entry is an end-of-list marker, the range
3188 describes an empty scope, i.e. no instructions. */
3194 *high_return = high;
3198 /* Get low and high pc attributes from a die. Return 1 if the attributes
3199 are present and valid, otherwise, return 0. Return -1 if the range is
3200 discontinuous, i.e. derived from DW_AT_ranges information. */
3202 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
3203 CORE_ADDR *highpc, struct dwarf2_cu *cu)
3205 struct attribute *attr;
3210 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
3213 high = DW_ADDR (attr);
3214 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3216 low = DW_ADDR (attr);
3218 /* Found high w/o low attribute. */
3221 /* Found consecutive range of addresses. */
3226 attr = dwarf2_attr (die, DW_AT_ranges, cu);
3229 /* Value of the DW_AT_ranges attribute is the offset in the
3230 .debug_ranges section. */
3231 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu))
3233 /* Found discontinuous range of addresses. */
3241 /* When using the GNU linker, .gnu.linkonce. sections are used to
3242 eliminate duplicate copies of functions and vtables and such.
3243 The linker will arbitrarily choose one and discard the others.
3244 The AT_*_pc values for such functions refer to local labels in
3245 these sections. If the section from that file was discarded, the
3246 labels are not in the output, so the relocs get a value of 0.
3247 If this is a discarded function, mark the pc bounds as invalid,
3248 so that GDB will ignore it. */
3249 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
3257 /* Get the low and high pc's represented by the scope DIE, and store
3258 them in *LOWPC and *HIGHPC. If the correct values can't be
3259 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3262 get_scope_pc_bounds (struct die_info *die,
3263 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3264 struct dwarf2_cu *cu)
3266 CORE_ADDR best_low = (CORE_ADDR) -1;
3267 CORE_ADDR best_high = (CORE_ADDR) 0;
3268 CORE_ADDR current_low, current_high;
3270 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu))
3272 best_low = current_low;
3273 best_high = current_high;
3277 struct die_info *child = die->child;
3279 while (child && child->tag)
3281 switch (child->tag) {
3282 case DW_TAG_subprogram:
3283 if (dwarf2_get_pc_bounds (child, ¤t_low, ¤t_high, cu))
3285 best_low = min (best_low, current_low);
3286 best_high = max (best_high, current_high);
3289 case DW_TAG_namespace:
3290 /* FIXME: carlton/2004-01-16: Should we do this for
3291 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3292 that current GCC's always emit the DIEs corresponding
3293 to definitions of methods of classes as children of a
3294 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3295 the DIEs giving the declarations, which could be
3296 anywhere). But I don't see any reason why the
3297 standards says that they have to be there. */
3298 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
3300 if (current_low != ((CORE_ADDR) -1))
3302 best_low = min (best_low, current_low);
3303 best_high = max (best_high, current_high);
3311 child = sibling_die (child);
3316 *highpc = best_high;
3319 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
3322 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
3323 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
3325 struct attribute *attr;
3327 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
3330 CORE_ADDR high = DW_ADDR (attr);
3331 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3334 CORE_ADDR low = DW_ADDR (attr);
3335 record_block_range (block, baseaddr + low, baseaddr + high - 1);
3339 attr = dwarf2_attr (die, DW_AT_ranges, cu);
3342 bfd *obfd = cu->objfile->obfd;
3344 /* The value of the DW_AT_ranges attribute is the offset of the
3345 address range list in the .debug_ranges section. */
3346 unsigned long offset = DW_UNSND (attr);
3347 gdb_byte *buffer = dwarf2_per_objfile->ranges_buffer + offset;
3349 /* For some target architectures, but not others, the
3350 read_address function sign-extends the addresses it returns.
3351 To recognize base address selection entries, we need a
3353 unsigned int addr_size = cu->header.addr_size;
3354 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3356 /* The base address, to which the next pair is relative. Note
3357 that this 'base' is a DWARF concept: most entries in a range
3358 list are relative, to reduce the number of relocs against the
3359 debugging information. This is separate from this function's
3360 'baseaddr' argument, which GDB uses to relocate debugging
3361 information from a shared library based on the address at
3362 which the library was loaded. */
3363 CORE_ADDR base = cu->header.base_address;
3364 int base_known = cu->header.base_known;
3366 if (offset >= dwarf2_per_objfile->ranges_size)
3368 complaint (&symfile_complaints,
3369 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
3376 unsigned int bytes_read;
3377 CORE_ADDR start, end;
3379 start = read_address (obfd, buffer, cu, &bytes_read);
3380 buffer += bytes_read;
3381 end = read_address (obfd, buffer, cu, &bytes_read);
3382 buffer += bytes_read;
3384 /* Did we find the end of the range list? */
3385 if (start == 0 && end == 0)
3388 /* Did we find a base address selection entry? */
3389 else if ((start & base_select_mask) == base_select_mask)
3395 /* We found an ordinary address range. */
3400 complaint (&symfile_complaints,
3401 _("Invalid .debug_ranges data (no base address)"));
3405 record_block_range (block,
3406 baseaddr + base + start,
3407 baseaddr + base + end - 1);
3413 /* Add an aggregate field to the field list. */
3416 dwarf2_add_field (struct field_info *fip, struct die_info *die,
3417 struct dwarf2_cu *cu)
3419 struct objfile *objfile = cu->objfile;
3420 struct nextfield *new_field;
3421 struct attribute *attr;
3423 char *fieldname = "";
3425 /* Allocate a new field list entry and link it in. */
3426 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3427 make_cleanup (xfree, new_field);
3428 memset (new_field, 0, sizeof (struct nextfield));
3429 new_field->next = fip->fields;
3430 fip->fields = new_field;
3433 /* Handle accessibility and virtuality of field.
3434 The default accessibility for members is public, the default
3435 accessibility for inheritance is private. */
3436 if (die->tag != DW_TAG_inheritance)
3437 new_field->accessibility = DW_ACCESS_public;
3439 new_field->accessibility = DW_ACCESS_private;
3440 new_field->virtuality = DW_VIRTUALITY_none;
3442 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
3444 new_field->accessibility = DW_UNSND (attr);
3445 if (new_field->accessibility != DW_ACCESS_public)
3446 fip->non_public_fields = 1;
3447 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
3449 new_field->virtuality = DW_UNSND (attr);
3451 fp = &new_field->field;
3453 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
3455 /* Data member other than a C++ static data member. */
3457 /* Get type of field. */
3458 fp->type = die_type (die, cu);
3460 FIELD_STATIC_KIND (*fp) = 0;
3462 /* Get bit size of field (zero if none). */
3463 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
3466 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
3470 FIELD_BITSIZE (*fp) = 0;
3473 /* Get bit offset of field. */
3474 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
3477 FIELD_BITPOS (*fp) =
3478 decode_locdesc (DW_BLOCK (attr), cu) * bits_per_byte;
3481 FIELD_BITPOS (*fp) = 0;
3482 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
3485 if (BITS_BIG_ENDIAN)
3487 /* For big endian bits, the DW_AT_bit_offset gives the
3488 additional bit offset from the MSB of the containing
3489 anonymous object to the MSB of the field. We don't
3490 have to do anything special since we don't need to
3491 know the size of the anonymous object. */
3492 FIELD_BITPOS (*fp) += DW_UNSND (attr);
3496 /* For little endian bits, compute the bit offset to the
3497 MSB of the anonymous object, subtract off the number of
3498 bits from the MSB of the field to the MSB of the
3499 object, and then subtract off the number of bits of
3500 the field itself. The result is the bit offset of
3501 the LSB of the field. */
3503 int bit_offset = DW_UNSND (attr);
3505 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
3508 /* The size of the anonymous object containing
3509 the bit field is explicit, so use the
3510 indicated size (in bytes). */
3511 anonymous_size = DW_UNSND (attr);
3515 /* The size of the anonymous object containing
3516 the bit field must be inferred from the type
3517 attribute of the data member containing the
3519 anonymous_size = TYPE_LENGTH (fp->type);
3521 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
3522 - bit_offset - FIELD_BITSIZE (*fp);
3526 /* Get name of field. */
3527 fieldname = dwarf2_name (die, cu);
3528 if (fieldname == NULL)
3531 /* The name is already allocated along with this objfile, so we don't
3532 need to duplicate it for the type. */
3533 fp->name = fieldname;
3535 /* Change accessibility for artificial fields (e.g. virtual table
3536 pointer or virtual base class pointer) to private. */
3537 if (dwarf2_attr (die, DW_AT_artificial, cu))
3539 new_field->accessibility = DW_ACCESS_private;
3540 fip->non_public_fields = 1;
3543 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
3545 /* C++ static member. */
3547 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3548 is a declaration, but all versions of G++ as of this writing
3549 (so through at least 3.2.1) incorrectly generate
3550 DW_TAG_variable tags. */
3554 /* Get name of field. */
3555 fieldname = dwarf2_name (die, cu);
3556 if (fieldname == NULL)
3559 /* Get physical name. */
3560 physname = dwarf2_linkage_name (die, cu);
3562 /* The name is already allocated along with this objfile, so we don't
3563 need to duplicate it for the type. */
3564 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
3565 FIELD_TYPE (*fp) = die_type (die, cu);
3566 FIELD_NAME (*fp) = fieldname;
3568 else if (die->tag == DW_TAG_inheritance)
3570 /* C++ base class field. */
3571 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
3573 FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu)
3575 FIELD_BITSIZE (*fp) = 0;
3576 FIELD_STATIC_KIND (*fp) = 0;
3577 FIELD_TYPE (*fp) = die_type (die, cu);
3578 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
3579 fip->nbaseclasses++;
3583 /* Create the vector of fields, and attach it to the type. */
3586 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
3587 struct dwarf2_cu *cu)
3589 int nfields = fip->nfields;
3591 /* Record the field count, allocate space for the array of fields,
3592 and create blank accessibility bitfields if necessary. */
3593 TYPE_NFIELDS (type) = nfields;
3594 TYPE_FIELDS (type) = (struct field *)
3595 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3596 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3598 if (fip->non_public_fields)
3600 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3602 TYPE_FIELD_PRIVATE_BITS (type) =
3603 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3604 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3606 TYPE_FIELD_PROTECTED_BITS (type) =
3607 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3608 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3610 TYPE_FIELD_IGNORE_BITS (type) =
3611 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3612 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3615 /* If the type has baseclasses, allocate and clear a bit vector for
3616 TYPE_FIELD_VIRTUAL_BITS. */
3617 if (fip->nbaseclasses)
3619 int num_bytes = B_BYTES (fip->nbaseclasses);
3620 unsigned char *pointer;
3622 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3623 pointer = TYPE_ALLOC (type, num_bytes);
3624 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
3625 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
3626 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
3629 /* Copy the saved-up fields into the field vector. Start from the head
3630 of the list, adding to the tail of the field array, so that they end
3631 up in the same order in the array in which they were added to the list. */
3632 while (nfields-- > 0)
3634 TYPE_FIELD (type, nfields) = fip->fields->field;
3635 switch (fip->fields->accessibility)
3637 case DW_ACCESS_private:
3638 SET_TYPE_FIELD_PRIVATE (type, nfields);
3641 case DW_ACCESS_protected:
3642 SET_TYPE_FIELD_PROTECTED (type, nfields);
3645 case DW_ACCESS_public:
3649 /* Unknown accessibility. Complain and treat it as public. */
3651 complaint (&symfile_complaints, _("unsupported accessibility %d"),
3652 fip->fields->accessibility);
3656 if (nfields < fip->nbaseclasses)
3658 switch (fip->fields->virtuality)
3660 case DW_VIRTUALITY_virtual:
3661 case DW_VIRTUALITY_pure_virtual:
3662 SET_TYPE_FIELD_VIRTUAL (type, nfields);
3666 fip->fields = fip->fields->next;
3670 /* Add a member function to the proper fieldlist. */
3673 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
3674 struct type *type, struct dwarf2_cu *cu)
3676 struct objfile *objfile = cu->objfile;
3677 struct attribute *attr;
3678 struct fnfieldlist *flp;
3680 struct fn_field *fnp;
3683 struct nextfnfield *new_fnfield;
3685 /* Get name of member function. */
3686 fieldname = dwarf2_name (die, cu);
3687 if (fieldname == NULL)
3690 /* Get the mangled name. */
3691 physname = dwarf2_linkage_name (die, cu);
3693 /* Look up member function name in fieldlist. */
3694 for (i = 0; i < fip->nfnfields; i++)
3696 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
3700 /* Create new list element if necessary. */
3701 if (i < fip->nfnfields)
3702 flp = &fip->fnfieldlists[i];
3705 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
3707 fip->fnfieldlists = (struct fnfieldlist *)
3708 xrealloc (fip->fnfieldlists,
3709 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
3710 * sizeof (struct fnfieldlist));
3711 if (fip->nfnfields == 0)
3712 make_cleanup (free_current_contents, &fip->fnfieldlists);
3714 flp = &fip->fnfieldlists[fip->nfnfields];
3715 flp->name = fieldname;
3721 /* Create a new member function field and chain it to the field list
3723 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
3724 make_cleanup (xfree, new_fnfield);
3725 memset (new_fnfield, 0, sizeof (struct nextfnfield));
3726 new_fnfield->next = flp->head;
3727 flp->head = new_fnfield;
3730 /* Fill in the member function field info. */
3731 fnp = &new_fnfield->fnfield;
3732 /* The name is already allocated along with this objfile, so we don't
3733 need to duplicate it for the type. */
3734 fnp->physname = physname ? physname : "";
3735 fnp->type = alloc_type (objfile);
3736 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
3738 int nparams = TYPE_NFIELDS (die->type);
3740 /* TYPE is the domain of this method, and DIE->TYPE is the type
3741 of the method itself (TYPE_CODE_METHOD). */
3742 smash_to_method_type (fnp->type, type,
3743 TYPE_TARGET_TYPE (die->type),
3744 TYPE_FIELDS (die->type),
3745 TYPE_NFIELDS (die->type),
3746 TYPE_VARARGS (die->type));
3748 /* Handle static member functions.
3749 Dwarf2 has no clean way to discern C++ static and non-static
3750 member functions. G++ helps GDB by marking the first
3751 parameter for non-static member functions (which is the
3752 this pointer) as artificial. We obtain this information
3753 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3754 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
3755 fnp->voffset = VOFFSET_STATIC;
3758 complaint (&symfile_complaints, _("member function type missing for '%s'"),
3761 /* Get fcontext from DW_AT_containing_type if present. */
3762 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
3763 fnp->fcontext = die_containing_type (die, cu);
3765 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3766 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3768 /* Get accessibility. */
3769 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
3772 switch (DW_UNSND (attr))
3774 case DW_ACCESS_private:
3775 fnp->is_private = 1;
3777 case DW_ACCESS_protected:
3778 fnp->is_protected = 1;
3783 /* Check for artificial methods. */
3784 attr = dwarf2_attr (die, DW_AT_artificial, cu);
3785 if (attr && DW_UNSND (attr) != 0)
3786 fnp->is_artificial = 1;
3788 /* Get index in virtual function table if it is a virtual member function. */
3789 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
3792 /* Support the .debug_loc offsets */
3793 if (attr_form_is_block (attr))
3795 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
3797 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
3799 dwarf2_complex_location_expr_complaint ();
3803 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3809 /* Create the vector of member function fields, and attach it to the type. */
3812 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
3813 struct dwarf2_cu *cu)
3815 struct fnfieldlist *flp;
3816 int total_length = 0;
3819 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3820 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
3821 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
3823 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
3825 struct nextfnfield *nfp = flp->head;
3826 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
3829 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
3830 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
3831 fn_flp->fn_fields = (struct fn_field *)
3832 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
3833 for (k = flp->length; (k--, nfp); nfp = nfp->next)
3834 fn_flp->fn_fields[k] = nfp->fnfield;
3836 total_length += flp->length;
3839 TYPE_NFN_FIELDS (type) = fip->nfnfields;
3840 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
3843 /* Returns non-zero if NAME is the name of a vtable member in CU's
3844 language, zero otherwise. */
3846 is_vtable_name (const char *name, struct dwarf2_cu *cu)
3848 static const char vptr[] = "_vptr";
3849 static const char vtable[] = "vtable";
3851 /* Look for the C++ and Java forms of the vtable. */
3852 if ((cu->language == language_java
3853 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
3854 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
3855 && is_cplus_marker (name[sizeof (vptr) - 1])))
3861 /* GCC outputs unnamed structures that are really pointers to member
3862 functions, with the ABI-specified layout. If DIE (from CU) describes
3863 such a structure, set its type, and return nonzero. Otherwise return
3866 GCC shouldn't do this; it should just output pointer to member DIEs.
3867 This is GCC PR debug/28767. */
3870 quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
3872 struct objfile *objfile = cu->objfile;
3874 struct die_info *pfn_die, *delta_die;
3875 struct attribute *pfn_name, *delta_name;
3876 struct type *pfn_type, *domain_type;
3878 /* Check for a structure with no name and two children. */
3879 if (die->tag != DW_TAG_structure_type
3880 || dwarf2_attr (die, DW_AT_name, cu) != NULL
3881 || die->child == NULL
3882 || die->child->sibling == NULL
3883 || (die->child->sibling->sibling != NULL
3884 && die->child->sibling->sibling->tag != DW_TAG_padding))
3887 /* Check for __pfn and __delta members. */
3888 pfn_die = die->child;
3889 pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
3890 if (pfn_die->tag != DW_TAG_member
3892 || DW_STRING (pfn_name) == NULL
3893 || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
3896 delta_die = pfn_die->sibling;
3897 delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
3898 if (delta_die->tag != DW_TAG_member
3899 || delta_name == NULL
3900 || DW_STRING (delta_name) == NULL
3901 || strcmp ("__delta", DW_STRING (delta_name)) != 0)
3904 /* Find the type of the method. */
3905 pfn_type = die_type (pfn_die, cu);
3906 if (pfn_type == NULL
3907 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
3908 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
3911 /* Look for the "this" argument. */
3912 pfn_type = TYPE_TARGET_TYPE (pfn_type);
3913 if (TYPE_NFIELDS (pfn_type) == 0
3914 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
3917 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
3918 type = alloc_type (objfile);
3919 smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
3920 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
3921 TYPE_VARARGS (pfn_type));
3922 type = lookup_methodptr_type (type);
3923 set_die_type (die, type, cu);
3928 /* Called when we find the DIE that starts a structure or union scope
3929 (definition) to process all dies that define the members of the
3932 NOTE: we need to call struct_type regardless of whether or not the
3933 DIE has an at_name attribute, since it might be an anonymous
3934 structure or union. This gets the type entered into our set of
3937 However, if the structure is incomplete (an opaque struct/union)
3938 then suppress creating a symbol table entry for it since gdb only
3939 wants to find the one with the complete definition. Note that if
3940 it is complete, we just call new_symbol, which does it's own
3941 checking about whether the struct/union is anonymous or not (and
3942 suppresses creating a symbol table entry itself). */
3945 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
3947 struct objfile *objfile = cu->objfile;
3949 struct attribute *attr;
3950 const char *previous_prefix = processing_current_prefix;
3951 struct cleanup *back_to = NULL;
3957 if (quirk_gcc_member_function_pointer (die, cu))
3960 type = alloc_type (objfile);
3961 INIT_CPLUS_SPECIFIC (type);
3962 name = dwarf2_name (die, cu);
3965 if (cu->language == language_cplus
3966 || cu->language == language_java)
3968 char *new_prefix = determine_class_name (die, cu);
3969 TYPE_TAG_NAME (type) = obsavestring (new_prefix,
3970 strlen (new_prefix),
3971 &objfile->objfile_obstack);
3972 back_to = make_cleanup (xfree, new_prefix);
3973 processing_current_prefix = new_prefix;
3977 /* The name is already allocated along with this objfile, so
3978 we don't need to duplicate it for the type. */
3979 TYPE_TAG_NAME (type) = name;
3983 if (die->tag == DW_TAG_structure_type)
3985 TYPE_CODE (type) = TYPE_CODE_STRUCT;
3987 else if (die->tag == DW_TAG_union_type)
3989 TYPE_CODE (type) = TYPE_CODE_UNION;
3993 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
3995 TYPE_CODE (type) = TYPE_CODE_CLASS;
3998 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4001 TYPE_LENGTH (type) = DW_UNSND (attr);
4005 TYPE_LENGTH (type) = 0;
4008 TYPE_FLAGS (type) |= TYPE_FLAG_STUB_SUPPORTED;
4009 if (die_is_declaration (die, cu))
4010 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
4012 /* We need to add the type field to the die immediately so we don't
4013 infinitely recurse when dealing with pointers to the structure
4014 type within the structure itself. */
4015 set_die_type (die, type, cu);
4017 if (die->child != NULL && ! die_is_declaration (die, cu))
4019 struct field_info fi;
4020 struct die_info *child_die;
4021 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
4023 memset (&fi, 0, sizeof (struct field_info));
4025 child_die = die->child;
4027 while (child_die && child_die->tag)
4029 if (child_die->tag == DW_TAG_member
4030 || child_die->tag == DW_TAG_variable)
4032 /* NOTE: carlton/2002-11-05: A C++ static data member
4033 should be a DW_TAG_member that is a declaration, but
4034 all versions of G++ as of this writing (so through at
4035 least 3.2.1) incorrectly generate DW_TAG_variable
4036 tags for them instead. */
4037 dwarf2_add_field (&fi, child_die, cu);
4039 else if (child_die->tag == DW_TAG_subprogram)
4041 /* C++ member function. */
4042 read_type_die (child_die, cu);
4043 dwarf2_add_member_fn (&fi, child_die, type, cu);
4045 else if (child_die->tag == DW_TAG_inheritance)
4047 /* C++ base class field. */
4048 dwarf2_add_field (&fi, child_die, cu);
4050 child_die = sibling_die (child_die);
4053 /* Attach fields and member functions to the type. */
4055 dwarf2_attach_fields_to_type (&fi, type, cu);
4058 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
4060 /* Get the type which refers to the base class (possibly this
4061 class itself) which contains the vtable pointer for the current
4062 class from the DW_AT_containing_type attribute. */
4064 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4066 struct type *t = die_containing_type (die, cu);
4068 TYPE_VPTR_BASETYPE (type) = t;
4073 /* Our own class provides vtbl ptr. */
4074 for (i = TYPE_NFIELDS (t) - 1;
4075 i >= TYPE_N_BASECLASSES (t);
4078 char *fieldname = TYPE_FIELD_NAME (t, i);
4080 if (is_vtable_name (fieldname, cu))
4082 TYPE_VPTR_FIELDNO (type) = i;
4087 /* Complain if virtual function table field not found. */
4088 if (i < TYPE_N_BASECLASSES (t))
4089 complaint (&symfile_complaints,
4090 _("virtual function table pointer not found when defining class '%s'"),
4091 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
4096 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
4099 else if (cu->producer
4100 && strncmp (cu->producer,
4101 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4103 /* The IBM XLC compiler does not provide direct indication
4104 of the containing type, but the vtable pointer is
4105 always named __vfp. */
4109 for (i = TYPE_NFIELDS (type) - 1;
4110 i >= TYPE_N_BASECLASSES (type);
4113 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
4115 TYPE_VPTR_FIELDNO (type) = i;
4116 TYPE_VPTR_BASETYPE (type) = type;
4123 do_cleanups (back_to);
4126 processing_current_prefix = previous_prefix;
4127 if (back_to != NULL)
4128 do_cleanups (back_to);
4132 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
4134 struct objfile *objfile = cu->objfile;
4135 const char *previous_prefix = processing_current_prefix;
4136 struct die_info *child_die = die->child;
4138 if (TYPE_TAG_NAME (die->type) != NULL)
4139 processing_current_prefix = TYPE_TAG_NAME (die->type);
4141 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4142 snapshots) has been known to create a die giving a declaration
4143 for a class that has, as a child, a die giving a definition for a
4144 nested class. So we have to process our children even if the
4145 current die is a declaration. Normally, of course, a declaration
4146 won't have any children at all. */
4148 while (child_die != NULL && child_die->tag)
4150 if (child_die->tag == DW_TAG_member
4151 || child_die->tag == DW_TAG_variable
4152 || child_die->tag == DW_TAG_inheritance)
4157 process_die (child_die, cu);
4159 child_die = sibling_die (child_die);
4162 /* Do not consider external references. According to the DWARF standard,
4163 these DIEs are identified by the fact that they have no byte_size
4164 attribute, and a declaration attribute. */
4165 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
4166 || !die_is_declaration (die, cu))
4167 new_symbol (die, die->type, cu);
4169 processing_current_prefix = previous_prefix;
4172 /* Given a DW_AT_enumeration_type die, set its type. We do not
4173 complete the type's fields yet, or create any symbols. */
4176 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
4178 struct objfile *objfile = cu->objfile;
4180 struct attribute *attr;
4186 type = alloc_type (objfile);
4188 TYPE_CODE (type) = TYPE_CODE_ENUM;
4189 name = dwarf2_name (die, cu);
4192 if (processing_has_namespace_info)
4194 TYPE_TAG_NAME (type) = typename_concat (&objfile->objfile_obstack,
4195 processing_current_prefix,
4200 /* The name is already allocated along with this objfile, so
4201 we don't need to duplicate it for the type. */
4202 TYPE_TAG_NAME (type) = name;
4206 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4209 TYPE_LENGTH (type) = DW_UNSND (attr);
4213 TYPE_LENGTH (type) = 0;
4216 set_die_type (die, type, cu);
4219 /* Determine the name of the type represented by DIE, which should be
4220 a named C++ or Java compound type. Return the name in question; the caller
4221 is responsible for xfree()'ing it. */
4224 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
4226 struct cleanup *back_to = NULL;
4227 struct die_info *spec_die = die_specification (die, cu);
4228 char *new_prefix = NULL;
4230 /* If this is the definition of a class that is declared by another
4231 die, then processing_current_prefix may not be accurate; see
4232 read_func_scope for a similar example. */
4233 if (spec_die != NULL)
4235 char *specification_prefix = determine_prefix (spec_die, cu);
4236 processing_current_prefix = specification_prefix;
4237 back_to = make_cleanup (xfree, specification_prefix);
4240 /* If we don't have namespace debug info, guess the name by trying
4241 to demangle the names of members, just like we did in
4242 guess_structure_name. */
4243 if (!processing_has_namespace_info)
4245 struct die_info *child;
4247 for (child = die->child;
4248 child != NULL && child->tag != 0;
4249 child = sibling_die (child))
4251 if (child->tag == DW_TAG_subprogram)
4254 = language_class_name_from_physname (cu->language_defn,
4258 if (new_prefix != NULL)
4264 if (new_prefix == NULL)
4266 const char *name = dwarf2_name (die, cu);
4267 new_prefix = typename_concat (NULL, processing_current_prefix,
4268 name ? name : "<<anonymous>>",
4272 if (back_to != NULL)
4273 do_cleanups (back_to);
4278 /* Given a pointer to a die which begins an enumeration, process all
4279 the dies that define the members of the enumeration, and create the
4280 symbol for the enumeration type.
4282 NOTE: We reverse the order of the element list. */
4285 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
4287 struct objfile *objfile = cu->objfile;
4288 struct die_info *child_die;
4289 struct field *fields;
4292 int unsigned_enum = 1;
4297 if (die->child != NULL)
4299 child_die = die->child;
4300 while (child_die && child_die->tag)
4302 if (child_die->tag != DW_TAG_enumerator)
4304 process_die (child_die, cu);
4308 name = dwarf2_name (child_die, cu);
4311 sym = new_symbol (child_die, die->type, cu);
4312 if (SYMBOL_VALUE (sym) < 0)
4315 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
4317 fields = (struct field *)
4319 (num_fields + DW_FIELD_ALLOC_CHUNK)
4320 * sizeof (struct field));
4323 FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
4324 FIELD_TYPE (fields[num_fields]) = NULL;
4325 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
4326 FIELD_BITSIZE (fields[num_fields]) = 0;
4327 FIELD_STATIC_KIND (fields[num_fields]) = 0;
4333 child_die = sibling_die (child_die);
4338 TYPE_NFIELDS (die->type) = num_fields;
4339 TYPE_FIELDS (die->type) = (struct field *)
4340 TYPE_ALLOC (die->type, sizeof (struct field) * num_fields);
4341 memcpy (TYPE_FIELDS (die->type), fields,
4342 sizeof (struct field) * num_fields);
4346 TYPE_FLAGS (die->type) |= TYPE_FLAG_UNSIGNED;
4349 new_symbol (die, die->type, cu);
4352 /* Extract all information from a DW_TAG_array_type DIE and put it in
4353 the DIE's type field. For now, this only handles one dimensional
4357 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
4359 struct objfile *objfile = cu->objfile;
4360 struct die_info *child_die;
4361 struct type *type = NULL;
4362 struct type *element_type, *range_type, *index_type;
4363 struct type **range_types = NULL;
4364 struct attribute *attr;
4366 struct cleanup *back_to;
4369 /* Return if we've already decoded this type. */
4375 element_type = die_type (die, cu);
4377 /* Irix 6.2 native cc creates array types without children for
4378 arrays with unspecified length. */
4379 if (die->child == NULL)
4381 index_type = builtin_type_int32;
4382 range_type = create_range_type (NULL, index_type, 0, -1);
4383 set_die_type (die, create_array_type (NULL, element_type, range_type),
4388 back_to = make_cleanup (null_cleanup, NULL);
4389 child_die = die->child;
4390 while (child_die && child_die->tag)
4392 if (child_die->tag == DW_TAG_subrange_type)
4394 read_subrange_type (child_die, cu);
4396 if (child_die->type != NULL)
4398 /* The range type was succesfully read. Save it for
4399 the array type creation. */
4400 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
4402 range_types = (struct type **)
4403 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
4404 * sizeof (struct type *));
4406 make_cleanup (free_current_contents, &range_types);
4408 range_types[ndim++] = child_die->type;
4411 child_die = sibling_die (child_die);
4414 /* Dwarf2 dimensions are output from left to right, create the
4415 necessary array types in backwards order. */
4417 type = element_type;
4419 if (read_array_order (die, cu) == DW_ORD_col_major)
4423 type = create_array_type (NULL, type, range_types[i++]);
4428 type = create_array_type (NULL, type, range_types[ndim]);
4431 /* Understand Dwarf2 support for vector types (like they occur on
4432 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4433 array type. This is not part of the Dwarf2/3 standard yet, but a
4434 custom vendor extension. The main difference between a regular
4435 array and the vector variant is that vectors are passed by value
4437 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
4439 make_vector_type (type);
4441 name = dwarf2_name (die, cu);
4443 TYPE_NAME (type) = name;
4445 do_cleanups (back_to);
4447 /* Install the type in the die. */
4448 set_die_type (die, type, cu);
4451 static enum dwarf_array_dim_ordering
4452 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
4454 struct attribute *attr;
4456 attr = dwarf2_attr (die, DW_AT_ordering, cu);
4458 if (attr) return DW_SND (attr);
4461 GNU F77 is a special case, as at 08/2004 array type info is the
4462 opposite order to the dwarf2 specification, but data is still
4463 laid out as per normal fortran.
4465 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4469 if (cu->language == language_fortran &&
4470 cu->producer && strstr (cu->producer, "GNU F77"))
4472 return DW_ORD_row_major;
4475 switch (cu->language_defn->la_array_ordering)
4477 case array_column_major:
4478 return DW_ORD_col_major;
4479 case array_row_major:
4481 return DW_ORD_row_major;
4485 /* Extract all information from a DW_TAG_set_type DIE and put it in
4486 the DIE's type field. */
4489 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
4491 if (die->type == NULL)
4492 die->type = create_set_type ((struct type *) NULL, die_type (die, cu));
4495 /* First cut: install each common block member as a global variable. */
4498 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
4500 struct die_info *child_die;
4501 struct attribute *attr;
4503 CORE_ADDR base = (CORE_ADDR) 0;
4505 attr = dwarf2_attr (die, DW_AT_location, cu);
4508 /* Support the .debug_loc offsets */
4509 if (attr_form_is_block (attr))
4511 base = decode_locdesc (DW_BLOCK (attr), cu);
4513 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
4515 dwarf2_complex_location_expr_complaint ();
4519 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4520 "common block member");
4523 if (die->child != NULL)
4525 child_die = die->child;
4526 while (child_die && child_die->tag)
4528 sym = new_symbol (child_die, NULL, cu);
4529 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
4532 SYMBOL_VALUE_ADDRESS (sym) =
4533 base + decode_locdesc (DW_BLOCK (attr), cu);
4534 add_symbol_to_list (sym, &global_symbols);
4536 child_die = sibling_die (child_die);
4541 /* Read a C++ namespace. */
4544 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
4546 struct objfile *objfile = cu->objfile;
4547 const char *previous_prefix = processing_current_prefix;
4550 struct die_info *current_die;
4551 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4553 name = namespace_name (die, &is_anonymous, cu);
4555 /* Now build the name of the current namespace. */
4557 if (previous_prefix[0] == '\0')
4559 processing_current_prefix = name;
4563 char *temp_name = typename_concat (NULL, previous_prefix, name, cu);
4564 make_cleanup (xfree, temp_name);
4565 processing_current_prefix = temp_name;
4568 /* Add a symbol associated to this if we haven't seen the namespace
4569 before. Also, add a using directive if it's an anonymous
4572 if (dwarf2_extension (die, cu) == NULL)
4576 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4577 this cast will hopefully become unnecessary. */
4578 type = init_type (TYPE_CODE_NAMESPACE, 0, 0,
4579 (char *) processing_current_prefix,
4581 TYPE_TAG_NAME (type) = TYPE_NAME (type);
4583 new_symbol (die, type, cu);
4584 set_die_type (die, type, cu);
4587 cp_add_using_directive (processing_current_prefix,
4588 strlen (previous_prefix),
4589 strlen (processing_current_prefix));
4592 if (die->child != NULL)
4594 struct die_info *child_die = die->child;
4596 while (child_die && child_die->tag)
4598 process_die (child_die, cu);
4599 child_die = sibling_die (child_die);
4603 processing_current_prefix = previous_prefix;
4604 do_cleanups (back_to);
4607 /* Return the name of the namespace represented by DIE. Set
4608 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4612 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
4614 struct die_info *current_die;
4615 const char *name = NULL;
4617 /* Loop through the extensions until we find a name. */
4619 for (current_die = die;
4620 current_die != NULL;
4621 current_die = dwarf2_extension (die, cu))
4623 name = dwarf2_name (current_die, cu);
4628 /* Is it an anonymous namespace? */
4630 *is_anonymous = (name == NULL);
4632 name = "(anonymous namespace)";
4637 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4638 the user defined type vector. */
4641 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
4643 struct comp_unit_head *cu_header = &cu->header;
4645 struct attribute *attr_byte_size;
4646 struct attribute *attr_address_class;
4647 int byte_size, addr_class;
4654 type = lookup_pointer_type (die_type (die, cu));
4656 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
4658 byte_size = DW_UNSND (attr_byte_size);
4660 byte_size = cu_header->addr_size;
4662 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
4663 if (attr_address_class)
4664 addr_class = DW_UNSND (attr_address_class);
4666 addr_class = DW_ADDR_none;
4668 /* If the pointer size or address class is different than the
4669 default, create a type variant marked as such and set the
4670 length accordingly. */
4671 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
4673 if (gdbarch_address_class_type_flags_p (current_gdbarch))
4677 type_flags = gdbarch_address_class_type_flags
4678 (current_gdbarch, byte_size, addr_class);
4679 gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0);
4680 type = make_type_with_address_space (type, type_flags);
4682 else if (TYPE_LENGTH (type) != byte_size)
4684 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
4687 /* Should we also complain about unhandled address classes? */
4691 TYPE_LENGTH (type) = byte_size;
4692 set_die_type (die, type, cu);
4695 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4696 the user defined type vector. */
4699 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
4701 struct objfile *objfile = cu->objfile;
4703 struct type *to_type;
4704 struct type *domain;
4711 to_type = die_type (die, cu);
4712 domain = die_containing_type (die, cu);
4714 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
4715 type = lookup_methodptr_type (to_type);
4717 type = lookup_memberptr_type (to_type, domain);
4719 set_die_type (die, type, cu);
4722 /* Extract all information from a DW_TAG_reference_type DIE and add to
4723 the user defined type vector. */
4726 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
4728 struct comp_unit_head *cu_header = &cu->header;
4730 struct attribute *attr;
4737 type = lookup_reference_type (die_type (die, cu));
4738 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4741 TYPE_LENGTH (type) = DW_UNSND (attr);
4745 TYPE_LENGTH (type) = cu_header->addr_size;
4747 set_die_type (die, type, cu);
4751 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
4753 struct type *base_type;
4760 base_type = die_type (die, cu);
4761 set_die_type (die, make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0),
4766 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
4768 struct type *base_type;
4775 base_type = die_type (die, cu);
4776 set_die_type (die, make_cv_type (TYPE_CONST (base_type), 1, base_type, 0),
4780 /* Extract all information from a DW_TAG_string_type DIE and add to
4781 the user defined type vector. It isn't really a user defined type,
4782 but it behaves like one, with other DIE's using an AT_user_def_type
4783 attribute to reference it. */
4786 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
4788 struct objfile *objfile = cu->objfile;
4789 struct type *type, *range_type, *index_type, *char_type;
4790 struct attribute *attr;
4791 unsigned int length;
4798 attr = dwarf2_attr (die, DW_AT_string_length, cu);
4801 length = DW_UNSND (attr);
4805 /* check for the DW_AT_byte_size attribute */
4806 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4809 length = DW_UNSND (attr);
4817 index_type = builtin_type_int32;
4818 range_type = create_range_type (NULL, index_type, 1, length);
4819 type = create_string_type (NULL, range_type);
4821 set_die_type (die, type, cu);
4824 /* Handle DIES due to C code like:
4828 int (*funcp)(int a, long l);
4832 ('funcp' generates a DW_TAG_subroutine_type DIE)
4836 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
4838 struct type *type; /* Type that this function returns */
4839 struct type *ftype; /* Function that returns above type */
4840 struct attribute *attr;
4842 /* Decode the type that this subroutine returns */
4847 type = die_type (die, cu);
4848 ftype = make_function_type (type, (struct type **) 0);
4850 /* All functions in C++, Pascal and Java have prototypes. */
4851 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
4852 if ((attr && (DW_UNSND (attr) != 0))
4853 || cu->language == language_cplus
4854 || cu->language == language_java
4855 || cu->language == language_pascal)
4856 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
4858 if (die->child != NULL)
4860 struct die_info *child_die;
4864 /* Count the number of parameters.
4865 FIXME: GDB currently ignores vararg functions, but knows about
4866 vararg member functions. */
4867 child_die = die->child;
4868 while (child_die && child_die->tag)
4870 if (child_die->tag == DW_TAG_formal_parameter)
4872 else if (child_die->tag == DW_TAG_unspecified_parameters)
4873 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
4874 child_die = sibling_die (child_die);
4877 /* Allocate storage for parameters and fill them in. */
4878 TYPE_NFIELDS (ftype) = nparams;
4879 TYPE_FIELDS (ftype) = (struct field *)
4880 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
4882 child_die = die->child;
4883 while (child_die && child_die->tag)
4885 if (child_die->tag == DW_TAG_formal_parameter)
4887 /* Dwarf2 has no clean way to discern C++ static and non-static
4888 member functions. G++ helps GDB by marking the first
4889 parameter for non-static member functions (which is the
4890 this pointer) as artificial. We pass this information
4891 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4892 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
4894 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
4896 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
4897 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
4900 child_die = sibling_die (child_die);
4904 set_die_type (die, ftype, cu);
4908 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
4910 struct objfile *objfile = cu->objfile;
4911 struct attribute *attr;
4916 name = dwarf2_name (die, cu);
4917 set_die_type (die, init_type (TYPE_CODE_TYPEDEF, 0,
4918 TYPE_FLAG_TARGET_STUB, name, objfile),
4920 TYPE_TARGET_TYPE (die->type) = die_type (die, cu);
4924 /* Find a representation of a given base type and install
4925 it in the TYPE field of the die. */
4928 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
4930 struct objfile *objfile = cu->objfile;
4932 struct attribute *attr;
4933 int encoding = 0, size = 0;
4935 enum type_code code = TYPE_CODE_INT;
4937 struct type *target_type = NULL;
4939 /* If we've already decoded this die, this is a no-op. */
4945 attr = dwarf2_attr (die, DW_AT_encoding, cu);
4948 encoding = DW_UNSND (attr);
4950 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4953 size = DW_UNSND (attr);
4955 name = dwarf2_name (die, cu);
4958 complaint (&symfile_complaints,
4959 _("DW_AT_name missing from DW_TAG_base_type"));
4964 case DW_ATE_address:
4965 /* Turn DW_ATE_address into a void * pointer. */
4966 code = TYPE_CODE_PTR;
4967 type_flags |= TYPE_FLAG_UNSIGNED;
4968 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4970 case DW_ATE_boolean:
4971 code = TYPE_CODE_BOOL;
4972 type_flags |= TYPE_FLAG_UNSIGNED;
4974 case DW_ATE_complex_float:
4975 code = TYPE_CODE_COMPLEX;
4976 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
4978 case DW_ATE_decimal_float:
4979 code = TYPE_CODE_DECFLOAT;
4982 code = TYPE_CODE_FLT;
4986 case DW_ATE_unsigned:
4987 type_flags |= TYPE_FLAG_UNSIGNED;
4989 case DW_ATE_signed_char:
4990 if (cu->language == language_m2)
4991 code = TYPE_CODE_CHAR;
4993 case DW_ATE_unsigned_char:
4994 if (cu->language == language_m2)
4995 code = TYPE_CODE_CHAR;
4996 type_flags |= TYPE_FLAG_UNSIGNED;
4999 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
5000 dwarf_type_encoding_name (encoding));
5004 type = init_type (code, size, type_flags, name, objfile);
5005 TYPE_TARGET_TYPE (type) = target_type;
5007 set_die_type (die, type, cu);
5010 /* Read the given DW_AT_subrange DIE. */
5013 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
5015 struct type *base_type;
5016 struct type *range_type;
5017 struct attribute *attr;
5022 /* If we have already decoded this die, then nothing more to do. */
5026 base_type = die_type (die, cu);
5027 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
5029 complaint (&symfile_complaints,
5030 _("DW_AT_type missing from DW_TAG_subrange_type"));
5032 = init_type (TYPE_CODE_INT, gdbarch_addr_bit (current_gdbarch) / 8,
5033 0, NULL, cu->objfile);
5036 if (cu->language == language_fortran)
5038 /* FORTRAN implies a lower bound of 1, if not given. */
5042 /* FIXME: For variable sized arrays either of these could be
5043 a variable rather than a constant value. We'll allow it,
5044 but we don't know how to handle it. */
5045 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
5047 low = dwarf2_get_attr_constant_value (attr, 0);
5049 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
5052 if (attr->form == DW_FORM_block1)
5054 /* GCC encodes arrays with unspecified or dynamic length
5055 with a DW_FORM_block1 attribute.
5056 FIXME: GDB does not yet know how to handle dynamic
5057 arrays properly, treat them as arrays with unspecified
5060 FIXME: jimb/2003-09-22: GDB does not really know
5061 how to handle arrays of unspecified length
5062 either; we just represent them as zero-length
5063 arrays. Choose an appropriate upper bound given
5064 the lower bound we've computed above. */
5068 high = dwarf2_get_attr_constant_value (attr, 1);
5071 range_type = create_range_type (NULL, base_type, low, high);
5073 name = dwarf2_name (die, cu);
5075 TYPE_NAME (range_type) = name;
5077 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5079 TYPE_LENGTH (range_type) = DW_UNSND (attr);
5081 set_die_type (die, range_type, cu);
5085 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
5092 /* For now, we only support the C meaning of an unspecified type: void. */
5094 type = init_type (TYPE_CODE_VOID, 0, 0, dwarf2_name (die, cu),
5097 set_die_type (die, type, cu);
5100 /* Read a whole compilation unit into a linked list of dies. */
5102 static struct die_info *
5103 read_comp_unit (gdb_byte *info_ptr, bfd *abfd, struct dwarf2_cu *cu)
5105 return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL);
5108 /* Read a single die and all its descendents. Set the die's sibling
5109 field to NULL; set other fields in the die correctly, and set all
5110 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5111 location of the info_ptr after reading all of those dies. PARENT
5112 is the parent of the die in question. */
5114 static struct die_info *
5115 read_die_and_children (gdb_byte *info_ptr, bfd *abfd,
5116 struct dwarf2_cu *cu,
5117 gdb_byte **new_info_ptr,
5118 struct die_info *parent)
5120 struct die_info *die;
5124 cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children);
5125 store_in_ref_table (die->offset, die, cu);
5129 die->child = read_die_and_siblings (cur_ptr, abfd, cu,
5135 *new_info_ptr = cur_ptr;
5138 die->sibling = NULL;
5139 die->parent = parent;
5143 /* Read a die, all of its descendents, and all of its siblings; set
5144 all of the fields of all of the dies correctly. Arguments are as
5145 in read_die_and_children. */
5147 static struct die_info *
5148 read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd,
5149 struct dwarf2_cu *cu,
5150 gdb_byte **new_info_ptr,
5151 struct die_info *parent)
5153 struct die_info *first_die, *last_sibling;
5157 first_die = last_sibling = NULL;
5161 struct die_info *die
5162 = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent);
5170 last_sibling->sibling = die;
5175 *new_info_ptr = cur_ptr;
5185 /* Free a linked list of dies. */
5188 free_die_list (struct die_info *dies)
5190 struct die_info *die, *next;
5195 if (die->child != NULL)
5196 free_die_list (die->child);
5197 next = die->sibling;
5204 /* Read the contents of the section at OFFSET and of size SIZE from the
5205 object file specified by OBJFILE into the objfile_obstack and return it. */
5208 dwarf2_read_section (struct objfile *objfile, asection *sectp)
5210 bfd *abfd = objfile->obfd;
5211 gdb_byte *buf, *retbuf;
5212 bfd_size_type size = bfd_get_section_size (sectp);
5217 buf = obstack_alloc (&objfile->objfile_obstack, size);
5218 retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
5222 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
5223 || bfd_bread (buf, size, abfd) != size)
5224 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5225 bfd_get_filename (abfd));
5230 /* In DWARF version 2, the description of the debugging information is
5231 stored in a separate .debug_abbrev section. Before we read any
5232 dies from a section we read in all abbreviations and install them
5233 in a hash table. This function also sets flags in CU describing
5234 the data found in the abbrev table. */
5237 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
5239 struct comp_unit_head *cu_header = &cu->header;
5240 gdb_byte *abbrev_ptr;
5241 struct abbrev_info *cur_abbrev;
5242 unsigned int abbrev_number, bytes_read, abbrev_name;
5243 unsigned int abbrev_form, hash_number;
5244 struct attr_abbrev *cur_attrs;
5245 unsigned int allocated_attrs;
5247 /* Initialize dwarf2 abbrevs */
5248 obstack_init (&cu->abbrev_obstack);
5249 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
5251 * sizeof (struct abbrev_info *)));
5252 memset (cu->dwarf2_abbrevs, 0,
5253 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
5255 abbrev_ptr = dwarf2_per_objfile->abbrev_buffer + cu_header->abbrev_offset;
5256 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5257 abbrev_ptr += bytes_read;
5259 allocated_attrs = ATTR_ALLOC_CHUNK;
5260 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
5262 /* loop until we reach an abbrev number of 0 */
5263 while (abbrev_number)
5265 cur_abbrev = dwarf_alloc_abbrev (cu);
5267 /* read in abbrev header */
5268 cur_abbrev->number = abbrev_number;
5269 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5270 abbrev_ptr += bytes_read;
5271 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
5274 if (cur_abbrev->tag == DW_TAG_namespace)
5275 cu->has_namespace_info = 1;
5277 /* now read in declarations */
5278 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5279 abbrev_ptr += bytes_read;
5280 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5281 abbrev_ptr += bytes_read;
5284 if (cur_abbrev->num_attrs == allocated_attrs)
5286 allocated_attrs += ATTR_ALLOC_CHUNK;
5288 = xrealloc (cur_attrs, (allocated_attrs
5289 * sizeof (struct attr_abbrev)));
5292 /* Record whether this compilation unit might have
5293 inter-compilation-unit references. If we don't know what form
5294 this attribute will have, then it might potentially be a
5295 DW_FORM_ref_addr, so we conservatively expect inter-CU
5298 if (abbrev_form == DW_FORM_ref_addr
5299 || abbrev_form == DW_FORM_indirect)
5300 cu->has_form_ref_addr = 1;
5302 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
5303 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
5304 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5305 abbrev_ptr += bytes_read;
5306 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5307 abbrev_ptr += bytes_read;
5310 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
5311 (cur_abbrev->num_attrs
5312 * sizeof (struct attr_abbrev)));
5313 memcpy (cur_abbrev->attrs, cur_attrs,
5314 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
5316 hash_number = abbrev_number % ABBREV_HASH_SIZE;
5317 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
5318 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
5320 /* Get next abbreviation.
5321 Under Irix6 the abbreviations for a compilation unit are not
5322 always properly terminated with an abbrev number of 0.
5323 Exit loop if we encounter an abbreviation which we have
5324 already read (which means we are about to read the abbreviations
5325 for the next compile unit) or if the end of the abbreviation
5326 table is reached. */
5327 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev_buffer)
5328 >= dwarf2_per_objfile->abbrev_size)
5330 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5331 abbrev_ptr += bytes_read;
5332 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
5339 /* Release the memory used by the abbrev table for a compilation unit. */
5342 dwarf2_free_abbrev_table (void *ptr_to_cu)
5344 struct dwarf2_cu *cu = ptr_to_cu;
5346 obstack_free (&cu->abbrev_obstack, NULL);
5347 cu->dwarf2_abbrevs = NULL;
5350 /* Lookup an abbrev_info structure in the abbrev hash table. */
5352 static struct abbrev_info *
5353 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
5355 unsigned int hash_number;
5356 struct abbrev_info *abbrev;
5358 hash_number = number % ABBREV_HASH_SIZE;
5359 abbrev = cu->dwarf2_abbrevs[hash_number];
5363 if (abbrev->number == number)
5366 abbrev = abbrev->next;
5371 /* Returns nonzero if TAG represents a type that we might generate a partial
5375 is_type_tag_for_partial (int tag)
5380 /* Some types that would be reasonable to generate partial symbols for,
5381 that we don't at present. */
5382 case DW_TAG_array_type:
5383 case DW_TAG_file_type:
5384 case DW_TAG_ptr_to_member_type:
5385 case DW_TAG_set_type:
5386 case DW_TAG_string_type:
5387 case DW_TAG_subroutine_type:
5389 case DW_TAG_base_type:
5390 case DW_TAG_class_type:
5391 case DW_TAG_enumeration_type:
5392 case DW_TAG_structure_type:
5393 case DW_TAG_subrange_type:
5394 case DW_TAG_typedef:
5395 case DW_TAG_union_type:
5402 /* Load all DIEs that are interesting for partial symbols into memory. */
5404 static struct partial_die_info *
5405 load_partial_dies (bfd *abfd, gdb_byte *info_ptr, int building_psymtab,
5406 struct dwarf2_cu *cu)
5408 struct partial_die_info *part_die;
5409 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
5410 struct abbrev_info *abbrev;
5411 unsigned int bytes_read;
5412 unsigned int load_all = 0;
5414 int nesting_level = 1;
5419 if (cu->per_cu && cu->per_cu->load_all_dies)
5423 = htab_create_alloc_ex (cu->header.length / 12,
5427 &cu->comp_unit_obstack,
5428 hashtab_obstack_allocate,
5429 dummy_obstack_deallocate);
5431 part_die = obstack_alloc (&cu->comp_unit_obstack,
5432 sizeof (struct partial_die_info));
5436 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
5438 /* A NULL abbrev means the end of a series of children. */
5441 if (--nesting_level == 0)
5443 /* PART_DIE was probably the last thing allocated on the
5444 comp_unit_obstack, so we could call obstack_free
5445 here. We don't do that because the waste is small,
5446 and will be cleaned up when we're done with this
5447 compilation unit. This way, we're also more robust
5448 against other users of the comp_unit_obstack. */
5451 info_ptr += bytes_read;
5452 last_die = parent_die;
5453 parent_die = parent_die->die_parent;
5457 /* Check whether this DIE is interesting enough to save. Normally
5458 we would not be interested in members here, but there may be
5459 later variables referencing them via DW_AT_specification (for
5462 && !is_type_tag_for_partial (abbrev->tag)
5463 && abbrev->tag != DW_TAG_enumerator
5464 && abbrev->tag != DW_TAG_subprogram
5465 && abbrev->tag != DW_TAG_variable
5466 && abbrev->tag != DW_TAG_namespace
5467 && abbrev->tag != DW_TAG_member)
5469 /* Otherwise we skip to the next sibling, if any. */
5470 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
5474 info_ptr = read_partial_die (part_die, abbrev, bytes_read,
5475 abfd, info_ptr, cu);
5477 /* This two-pass algorithm for processing partial symbols has a
5478 high cost in cache pressure. Thus, handle some simple cases
5479 here which cover the majority of C partial symbols. DIEs
5480 which neither have specification tags in them, nor could have
5481 specification tags elsewhere pointing at them, can simply be
5482 processed and discarded.
5484 This segment is also optional; scan_partial_symbols and
5485 add_partial_symbol will handle these DIEs if we chain
5486 them in normally. When compilers which do not emit large
5487 quantities of duplicate debug information are more common,
5488 this code can probably be removed. */
5490 /* Any complete simple types at the top level (pretty much all
5491 of them, for a language without namespaces), can be processed
5493 if (parent_die == NULL
5494 && part_die->has_specification == 0
5495 && part_die->is_declaration == 0
5496 && (part_die->tag == DW_TAG_typedef
5497 || part_die->tag == DW_TAG_base_type
5498 || part_die->tag == DW_TAG_subrange_type))
5500 if (building_psymtab && part_die->name != NULL)
5501 add_psymbol_to_list (part_die->name, strlen (part_die->name),
5502 VAR_DOMAIN, LOC_TYPEDEF,
5503 &cu->objfile->static_psymbols,
5504 0, (CORE_ADDR) 0, cu->language, cu->objfile);
5505 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
5509 /* If we're at the second level, and we're an enumerator, and
5510 our parent has no specification (meaning possibly lives in a
5511 namespace elsewhere), then we can add the partial symbol now
5512 instead of queueing it. */
5513 if (part_die->tag == DW_TAG_enumerator
5514 && parent_die != NULL
5515 && parent_die->die_parent == NULL
5516 && parent_die->tag == DW_TAG_enumeration_type
5517 && parent_die->has_specification == 0)
5519 if (part_die->name == NULL)
5520 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
5521 else if (building_psymtab)
5522 add_psymbol_to_list (part_die->name, strlen (part_die->name),
5523 VAR_DOMAIN, LOC_CONST,
5524 (cu->language == language_cplus
5525 || cu->language == language_java)
5526 ? &cu->objfile->global_psymbols
5527 : &cu->objfile->static_psymbols,
5528 0, (CORE_ADDR) 0, cu->language, cu->objfile);
5530 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
5534 /* We'll save this DIE so link it in. */
5535 part_die->die_parent = parent_die;
5536 part_die->die_sibling = NULL;
5537 part_die->die_child = NULL;
5539 if (last_die && last_die == parent_die)
5540 last_die->die_child = part_die;
5542 last_die->die_sibling = part_die;
5544 last_die = part_die;
5546 if (first_die == NULL)
5547 first_die = part_die;
5549 /* Maybe add the DIE to the hash table. Not all DIEs that we
5550 find interesting need to be in the hash table, because we
5551 also have the parent/sibling/child chains; only those that we
5552 might refer to by offset later during partial symbol reading.
5554 For now this means things that might have be the target of a
5555 DW_AT_specification, DW_AT_abstract_origin, or
5556 DW_AT_extension. DW_AT_extension will refer only to
5557 namespaces; DW_AT_abstract_origin refers to functions (and
5558 many things under the function DIE, but we do not recurse
5559 into function DIEs during partial symbol reading) and
5560 possibly variables as well; DW_AT_specification refers to
5561 declarations. Declarations ought to have the DW_AT_declaration
5562 flag. It happens that GCC forgets to put it in sometimes, but
5563 only for functions, not for types.
5565 Adding more things than necessary to the hash table is harmless
5566 except for the performance cost. Adding too few will result in
5567 wasted time in find_partial_die, when we reread the compilation
5568 unit with load_all_dies set. */
5571 || abbrev->tag == DW_TAG_subprogram
5572 || abbrev->tag == DW_TAG_variable
5573 || abbrev->tag == DW_TAG_namespace
5574 || part_die->is_declaration)
5578 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
5579 part_die->offset, INSERT);
5583 part_die = obstack_alloc (&cu->comp_unit_obstack,
5584 sizeof (struct partial_die_info));
5586 /* For some DIEs we want to follow their children (if any). For C
5587 we have no reason to follow the children of structures; for other
5588 languages we have to, both so that we can get at method physnames
5589 to infer fully qualified class names, and for DW_AT_specification. */
5590 if (last_die->has_children
5592 || last_die->tag == DW_TAG_namespace
5593 || last_die->tag == DW_TAG_enumeration_type
5594 || (cu->language != language_c
5595 && (last_die->tag == DW_TAG_class_type
5596 || last_die->tag == DW_TAG_structure_type
5597 || last_die->tag == DW_TAG_union_type))))
5600 parent_die = last_die;
5604 /* Otherwise we skip to the next sibling, if any. */
5605 info_ptr = locate_pdi_sibling (last_die, info_ptr, abfd, cu);
5607 /* Back to the top, do it again. */
5611 /* Read a minimal amount of information into the minimal die structure. */
5614 read_partial_die (struct partial_die_info *part_die,
5615 struct abbrev_info *abbrev,
5616 unsigned int abbrev_len, bfd *abfd,
5617 gdb_byte *info_ptr, struct dwarf2_cu *cu)
5619 unsigned int bytes_read, i;
5620 struct attribute attr;
5621 int has_low_pc_attr = 0;
5622 int has_high_pc_attr = 0;
5624 memset (part_die, 0, sizeof (struct partial_die_info));
5626 part_die->offset = info_ptr - dwarf2_per_objfile->info_buffer;
5628 info_ptr += abbrev_len;
5633 part_die->tag = abbrev->tag;
5634 part_die->has_children = abbrev->has_children;
5636 for (i = 0; i < abbrev->num_attrs; ++i)
5638 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
5640 /* Store the data if it is of an attribute we want to keep in a
5641 partial symbol table. */
5646 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5647 if (part_die->name == NULL)
5648 part_die->name = DW_STRING (&attr);
5650 case DW_AT_comp_dir:
5651 if (part_die->dirname == NULL)
5652 part_die->dirname = DW_STRING (&attr);
5654 case DW_AT_MIPS_linkage_name:
5655 part_die->name = DW_STRING (&attr);
5658 has_low_pc_attr = 1;
5659 part_die->lowpc = DW_ADDR (&attr);
5662 has_high_pc_attr = 1;
5663 part_die->highpc = DW_ADDR (&attr);
5666 if (dwarf2_ranges_read (DW_UNSND (&attr), &part_die->lowpc,
5667 &part_die->highpc, cu))
5668 has_low_pc_attr = has_high_pc_attr = 1;
5670 case DW_AT_location:
5671 /* Support the .debug_loc offsets */
5672 if (attr_form_is_block (&attr))
5674 part_die->locdesc = DW_BLOCK (&attr);
5676 else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8)
5678 dwarf2_complex_location_expr_complaint ();
5682 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5683 "partial symbol information");
5686 case DW_AT_language:
5687 part_die->language = DW_UNSND (&attr);
5689 case DW_AT_external:
5690 part_die->is_external = DW_UNSND (&attr);
5692 case DW_AT_declaration:
5693 part_die->is_declaration = DW_UNSND (&attr);
5696 part_die->has_type = 1;
5698 case DW_AT_abstract_origin:
5699 case DW_AT_specification:
5700 case DW_AT_extension:
5701 part_die->has_specification = 1;
5702 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr, cu);
5705 /* Ignore absolute siblings, they might point outside of
5706 the current compile unit. */
5707 if (attr.form == DW_FORM_ref_addr)
5708 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
5710 part_die->sibling = dwarf2_per_objfile->info_buffer
5711 + dwarf2_get_ref_die_offset (&attr, cu);
5713 case DW_AT_stmt_list:
5714 part_die->has_stmt_list = 1;
5715 part_die->line_offset = DW_UNSND (&attr);
5717 case DW_AT_byte_size:
5718 part_die->has_byte_size = 1;
5720 case DW_AT_calling_convention:
5721 /* DWARF doesn't provide a way to identify a program's source-level
5722 entry point. DW_AT_calling_convention attributes are only meant
5723 to describe functions' calling conventions.
5725 However, because it's a necessary piece of information in
5726 Fortran, and because DW_CC_program is the only piece of debugging
5727 information whose definition refers to a 'main program' at all,
5728 several compilers have begun marking Fortran main programs with
5729 DW_CC_program --- even when those functions use the standard
5730 calling conventions.
5732 So until DWARF specifies a way to provide this information and
5733 compilers pick up the new representation, we'll support this
5735 if (DW_UNSND (&attr) == DW_CC_program
5736 && cu->language == language_fortran)
5737 set_main_name (part_die->name);
5744 /* When using the GNU linker, .gnu.linkonce. sections are used to
5745 eliminate duplicate copies of functions and vtables and such.
5746 The linker will arbitrarily choose one and discard the others.
5747 The AT_*_pc values for such functions refer to local labels in
5748 these sections. If the section from that file was discarded, the
5749 labels are not in the output, so the relocs get a value of 0.
5750 If this is a discarded function, mark the pc bounds as invalid,
5751 so that GDB will ignore it. */
5752 if (has_low_pc_attr && has_high_pc_attr
5753 && part_die->lowpc < part_die->highpc
5754 && (part_die->lowpc != 0
5755 || dwarf2_per_objfile->has_section_at_zero))
5756 part_die->has_pc_info = 1;
5760 /* Find a cached partial DIE at OFFSET in CU. */
5762 static struct partial_die_info *
5763 find_partial_die_in_comp_unit (unsigned long offset, struct dwarf2_cu *cu)
5765 struct partial_die_info *lookup_die = NULL;
5766 struct partial_die_info part_die;
5768 part_die.offset = offset;
5769 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
5774 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5776 static struct partial_die_info *
5777 find_partial_die (unsigned long offset, struct dwarf2_cu *cu)
5779 struct dwarf2_per_cu_data *per_cu = NULL;
5780 struct partial_die_info *pd = NULL;
5782 if (offset >= cu->header.offset
5783 && offset < cu->header.offset + cu->header.length)
5785 pd = find_partial_die_in_comp_unit (offset, cu);
5790 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
5792 if (per_cu->cu == NULL)
5794 load_comp_unit (per_cu, cu->objfile);
5795 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
5796 dwarf2_per_objfile->read_in_chain = per_cu;
5799 per_cu->cu->last_used = 0;
5800 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
5802 if (pd == NULL && per_cu->load_all_dies == 0)
5804 struct cleanup *back_to;
5805 struct partial_die_info comp_unit_die;
5806 struct abbrev_info *abbrev;
5807 unsigned int bytes_read;
5810 per_cu->load_all_dies = 1;
5812 /* Re-read the DIEs. */
5813 back_to = make_cleanup (null_cleanup, 0);
5814 if (per_cu->cu->dwarf2_abbrevs == NULL)
5816 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
5817 back_to = make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
5819 info_ptr = per_cu->cu->header.first_die_ptr;
5820 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
5821 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
5822 per_cu->cu->objfile->obfd, info_ptr,
5824 if (comp_unit_die.has_children)
5825 load_partial_dies (per_cu->cu->objfile->obfd, info_ptr, 0, per_cu->cu);
5826 do_cleanups (back_to);
5828 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
5832 internal_error (__FILE__, __LINE__,
5833 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5834 offset, bfd_get_filename (cu->objfile->obfd));
5838 /* Adjust PART_DIE before generating a symbol for it. This function
5839 may set the is_external flag or change the DIE's name. */
5842 fixup_partial_die (struct partial_die_info *part_die,
5843 struct dwarf2_cu *cu)
5845 /* If we found a reference attribute and the DIE has no name, try
5846 to find a name in the referred to DIE. */
5848 if (part_die->name == NULL && part_die->has_specification)
5850 struct partial_die_info *spec_die;
5852 spec_die = find_partial_die (part_die->spec_offset, cu);
5854 fixup_partial_die (spec_die, cu);
5858 part_die->name = spec_die->name;
5860 /* Copy DW_AT_external attribute if it is set. */
5861 if (spec_die->is_external)
5862 part_die->is_external = spec_die->is_external;
5866 /* Set default names for some unnamed DIEs. */
5867 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
5868 || part_die->tag == DW_TAG_class_type))
5869 part_die->name = "(anonymous class)";
5871 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
5872 part_die->name = "(anonymous namespace)";
5874 if (part_die->tag == DW_TAG_structure_type
5875 || part_die->tag == DW_TAG_class_type
5876 || part_die->tag == DW_TAG_union_type)
5877 guess_structure_name (part_die, cu);
5880 /* Read the die from the .debug_info section buffer. Set DIEP to
5881 point to a newly allocated die with its information, except for its
5882 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5883 whether the die has children or not. */
5886 read_full_die (struct die_info **diep, bfd *abfd, gdb_byte *info_ptr,
5887 struct dwarf2_cu *cu, int *has_children)
5889 unsigned int abbrev_number, bytes_read, i, offset;
5890 struct abbrev_info *abbrev;
5891 struct die_info *die;
5893 offset = info_ptr - dwarf2_per_objfile->info_buffer;
5894 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5895 info_ptr += bytes_read;
5898 die = dwarf_alloc_die ();
5900 die->abbrev = abbrev_number;
5907 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
5910 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5912 bfd_get_filename (abfd));
5914 die = dwarf_alloc_die ();
5915 die->offset = offset;
5916 die->tag = abbrev->tag;
5917 die->abbrev = abbrev_number;
5920 die->num_attrs = abbrev->num_attrs;
5921 die->attrs = (struct attribute *)
5922 xmalloc (die->num_attrs * sizeof (struct attribute));
5924 for (i = 0; i < abbrev->num_attrs; ++i)
5926 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
5927 abfd, info_ptr, cu);
5929 /* If this attribute is an absolute reference to a different
5930 compilation unit, make sure that compilation unit is loaded
5932 if (die->attrs[i].form == DW_FORM_ref_addr
5933 && (DW_ADDR (&die->attrs[i]) < cu->header.offset
5934 || (DW_ADDR (&die->attrs[i])
5935 >= cu->header.offset + cu->header.length)))
5937 struct dwarf2_per_cu_data *per_cu;
5938 per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (&die->attrs[i]),
5941 /* Mark the dependence relation so that we don't flush PER_CU
5943 dwarf2_add_dependence (cu, per_cu);
5945 /* If it's already on the queue, we have nothing to do. */
5949 /* If the compilation unit is already loaded, just mark it as
5951 if (per_cu->cu != NULL)
5953 per_cu->cu->last_used = 0;
5957 /* Add it to the queue. */
5958 queue_comp_unit (per_cu);
5963 *has_children = abbrev->has_children;
5967 /* Read an attribute value described by an attribute form. */
5970 read_attribute_value (struct attribute *attr, unsigned form,
5971 bfd *abfd, gdb_byte *info_ptr,
5972 struct dwarf2_cu *cu)
5974 struct comp_unit_head *cu_header = &cu->header;
5975 unsigned int bytes_read;
5976 struct dwarf_block *blk;
5982 case DW_FORM_ref_addr:
5983 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
5984 info_ptr += bytes_read;
5986 case DW_FORM_block2:
5987 blk = dwarf_alloc_block (cu);
5988 blk->size = read_2_bytes (abfd, info_ptr);
5990 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5991 info_ptr += blk->size;
5992 DW_BLOCK (attr) = blk;
5994 case DW_FORM_block4:
5995 blk = dwarf_alloc_block (cu);
5996 blk->size = read_4_bytes (abfd, info_ptr);
5998 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5999 info_ptr += blk->size;
6000 DW_BLOCK (attr) = blk;
6003 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
6007 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
6011 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
6014 case DW_FORM_string:
6015 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
6016 info_ptr += bytes_read;
6019 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
6021 info_ptr += bytes_read;
6024 blk = dwarf_alloc_block (cu);
6025 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6026 info_ptr += bytes_read;
6027 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6028 info_ptr += blk->size;
6029 DW_BLOCK (attr) = blk;
6031 case DW_FORM_block1:
6032 blk = dwarf_alloc_block (cu);
6033 blk->size = read_1_byte (abfd, info_ptr);
6035 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6036 info_ptr += blk->size;
6037 DW_BLOCK (attr) = blk;
6040 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
6044 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
6048 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
6049 info_ptr += bytes_read;
6052 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6053 info_ptr += bytes_read;
6056 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
6060 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
6064 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
6068 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
6071 case DW_FORM_ref_udata:
6072 DW_ADDR (attr) = (cu->header.offset
6073 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
6074 info_ptr += bytes_read;
6076 case DW_FORM_indirect:
6077 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6078 info_ptr += bytes_read;
6079 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
6082 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6083 dwarf_form_name (form),
6084 bfd_get_filename (abfd));
6089 /* Read an attribute described by an abbreviated attribute. */
6092 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
6093 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
6095 attr->name = abbrev->name;
6096 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
6099 /* read dwarf information from a buffer */
6102 read_1_byte (bfd *abfd, gdb_byte *buf)
6104 return bfd_get_8 (abfd, buf);
6108 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
6110 return bfd_get_signed_8 (abfd, buf);
6114 read_2_bytes (bfd *abfd, gdb_byte *buf)
6116 return bfd_get_16 (abfd, buf);
6120 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
6122 return bfd_get_signed_16 (abfd, buf);
6126 read_4_bytes (bfd *abfd, gdb_byte *buf)
6128 return bfd_get_32 (abfd, buf);
6132 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
6134 return bfd_get_signed_32 (abfd, buf);
6137 static unsigned long
6138 read_8_bytes (bfd *abfd, gdb_byte *buf)
6140 return bfd_get_64 (abfd, buf);
6144 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
6145 unsigned int *bytes_read)
6147 struct comp_unit_head *cu_header = &cu->header;
6148 CORE_ADDR retval = 0;
6150 if (cu_header->signed_addr_p)
6152 switch (cu_header->addr_size)
6155 retval = bfd_get_signed_16 (abfd, buf);
6158 retval = bfd_get_signed_32 (abfd, buf);
6161 retval = bfd_get_signed_64 (abfd, buf);
6164 internal_error (__FILE__, __LINE__,
6165 _("read_address: bad switch, signed [in module %s]"),
6166 bfd_get_filename (abfd));
6171 switch (cu_header->addr_size)
6174 retval = bfd_get_16 (abfd, buf);
6177 retval = bfd_get_32 (abfd, buf);
6180 retval = bfd_get_64 (abfd, buf);
6183 internal_error (__FILE__, __LINE__,
6184 _("read_address: bad switch, unsigned [in module %s]"),
6185 bfd_get_filename (abfd));
6189 *bytes_read = cu_header->addr_size;
6193 /* Read the initial length from a section. The (draft) DWARF 3
6194 specification allows the initial length to take up either 4 bytes
6195 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6196 bytes describe the length and all offsets will be 8 bytes in length
6199 An older, non-standard 64-bit format is also handled by this
6200 function. The older format in question stores the initial length
6201 as an 8-byte quantity without an escape value. Lengths greater
6202 than 2^32 aren't very common which means that the initial 4 bytes
6203 is almost always zero. Since a length value of zero doesn't make
6204 sense for the 32-bit format, this initial zero can be considered to
6205 be an escape value which indicates the presence of the older 64-bit
6206 format. As written, the code can't detect (old format) lengths
6207 greater than 4GB. If it becomes necessary to handle lengths
6208 somewhat larger than 4GB, we could allow other small values (such
6209 as the non-sensical values of 1, 2, and 3) to also be used as
6210 escape values indicating the presence of the old format.
6212 The value returned via bytes_read should be used to increment the
6213 relevant pointer after calling read_initial_length().
6215 As a side effect, this function sets the fields initial_length_size
6216 and offset_size in cu_header to the values appropriate for the
6217 length field. (The format of the initial length field determines
6218 the width of file offsets to be fetched later with read_offset().)
6220 [ Note: read_initial_length() and read_offset() are based on the
6221 document entitled "DWARF Debugging Information Format", revision
6222 3, draft 8, dated November 19, 2001. This document was obtained
6225 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6227 This document is only a draft and is subject to change. (So beware.)
6229 Details regarding the older, non-standard 64-bit format were
6230 determined empirically by examining 64-bit ELF files produced by
6231 the SGI toolchain on an IRIX 6.5 machine.
6233 - Kevin, July 16, 2002
6237 read_initial_length (bfd *abfd, gdb_byte *buf, struct comp_unit_head *cu_header,
6238 unsigned int *bytes_read)
6240 LONGEST length = bfd_get_32 (abfd, buf);
6242 if (length == 0xffffffff)
6244 length = bfd_get_64 (abfd, buf + 4);
6247 else if (length == 0)
6249 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6250 length = bfd_get_64 (abfd, buf);
6260 gdb_assert (cu_header->initial_length_size == 0
6261 || cu_header->initial_length_size == 4
6262 || cu_header->initial_length_size == 8
6263 || cu_header->initial_length_size == 12);
6265 if (cu_header->initial_length_size != 0
6266 && cu_header->initial_length_size != *bytes_read)
6267 complaint (&symfile_complaints,
6268 _("intermixed 32-bit and 64-bit DWARF sections"));
6270 cu_header->initial_length_size = *bytes_read;
6271 cu_header->offset_size = (*bytes_read == 4) ? 4 : 8;
6277 /* Read an offset from the data stream. The size of the offset is
6278 given by cu_header->offset_size. */
6281 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
6282 unsigned int *bytes_read)
6286 switch (cu_header->offset_size)
6289 retval = bfd_get_32 (abfd, buf);
6293 retval = bfd_get_64 (abfd, buf);
6297 internal_error (__FILE__, __LINE__,
6298 _("read_offset: bad switch [in module %s]"),
6299 bfd_get_filename (abfd));
6306 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
6308 /* If the size of a host char is 8 bits, we can return a pointer
6309 to the buffer, otherwise we have to copy the data to a buffer
6310 allocated on the temporary obstack. */
6311 gdb_assert (HOST_CHAR_BIT == 8);
6316 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6318 /* If the size of a host char is 8 bits, we can return a pointer
6319 to the string, otherwise we have to copy the string to a buffer
6320 allocated on the temporary obstack. */
6321 gdb_assert (HOST_CHAR_BIT == 8);
6324 *bytes_read_ptr = 1;
6327 *bytes_read_ptr = strlen ((char *) buf) + 1;
6328 return (char *) buf;
6332 read_indirect_string (bfd *abfd, gdb_byte *buf,
6333 const struct comp_unit_head *cu_header,
6334 unsigned int *bytes_read_ptr)
6336 LONGEST str_offset = read_offset (abfd, buf, cu_header,
6339 if (dwarf2_per_objfile->str_buffer == NULL)
6341 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6342 bfd_get_filename (abfd));
6345 if (str_offset >= dwarf2_per_objfile->str_size)
6347 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6348 bfd_get_filename (abfd));
6351 gdb_assert (HOST_CHAR_BIT == 8);
6352 if (dwarf2_per_objfile->str_buffer[str_offset] == '\0')
6354 return (char *) (dwarf2_per_objfile->str_buffer + str_offset);
6357 static unsigned long
6358 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6360 unsigned long result;
6361 unsigned int num_read;
6371 byte = bfd_get_8 (abfd, buf);
6374 result |= ((unsigned long)(byte & 127) << shift);
6375 if ((byte & 128) == 0)
6381 *bytes_read_ptr = num_read;
6386 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6389 int i, shift, num_read;
6398 byte = bfd_get_8 (abfd, buf);
6401 result |= ((long)(byte & 127) << shift);
6403 if ((byte & 128) == 0)
6408 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
6409 result |= -(((long)1) << shift);
6410 *bytes_read_ptr = num_read;
6414 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6417 skip_leb128 (bfd *abfd, gdb_byte *buf)
6423 byte = bfd_get_8 (abfd, buf);
6425 if ((byte & 128) == 0)
6431 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
6437 cu->language = language_c;
6439 case DW_LANG_C_plus_plus:
6440 cu->language = language_cplus;
6442 case DW_LANG_Fortran77:
6443 case DW_LANG_Fortran90:
6444 case DW_LANG_Fortran95:
6445 cu->language = language_fortran;
6447 case DW_LANG_Mips_Assembler:
6448 cu->language = language_asm;
6451 cu->language = language_java;
6455 cu->language = language_ada;
6457 case DW_LANG_Modula2:
6458 cu->language = language_m2;
6460 case DW_LANG_Pascal83:
6461 cu->language = language_pascal;
6463 case DW_LANG_Cobol74:
6464 case DW_LANG_Cobol85:
6466 cu->language = language_minimal;
6469 cu->language_defn = language_def (cu->language);
6472 /* Return the named attribute or NULL if not there. */
6474 static struct attribute *
6475 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
6478 struct attribute *spec = NULL;
6480 for (i = 0; i < die->num_attrs; ++i)
6482 if (die->attrs[i].name == name)
6483 return &die->attrs[i];
6484 if (die->attrs[i].name == DW_AT_specification
6485 || die->attrs[i].name == DW_AT_abstract_origin)
6486 spec = &die->attrs[i];
6490 return dwarf2_attr (follow_die_ref (die, spec, cu), name, cu);
6495 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6496 and holds a non-zero value. This function should only be used for
6497 DW_FORM_flag attributes. */
6500 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
6502 struct attribute *attr = dwarf2_attr (die, name, cu);
6504 return (attr && DW_UNSND (attr));
6508 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
6510 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6511 which value is non-zero. However, we have to be careful with
6512 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6513 (via dwarf2_flag_true_p) follows this attribute. So we may
6514 end up accidently finding a declaration attribute that belongs
6515 to a different DIE referenced by the specification attribute,
6516 even though the given DIE does not have a declaration attribute. */
6517 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
6518 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
6521 /* Return the die giving the specification for DIE, if there is
6524 static struct die_info *
6525 die_specification (struct die_info *die, struct dwarf2_cu *cu)
6527 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, cu);
6529 if (spec_attr == NULL)
6532 return follow_die_ref (die, spec_attr, cu);
6535 /* Free the line_header structure *LH, and any arrays and strings it
6538 free_line_header (struct line_header *lh)
6540 if (lh->standard_opcode_lengths)
6541 xfree (lh->standard_opcode_lengths);
6543 /* Remember that all the lh->file_names[i].name pointers are
6544 pointers into debug_line_buffer, and don't need to be freed. */
6546 xfree (lh->file_names);
6548 /* Similarly for the include directory names. */
6549 if (lh->include_dirs)
6550 xfree (lh->include_dirs);
6556 /* Add an entry to LH's include directory table. */
6558 add_include_dir (struct line_header *lh, char *include_dir)
6560 /* Grow the array if necessary. */
6561 if (lh->include_dirs_size == 0)
6563 lh->include_dirs_size = 1; /* for testing */
6564 lh->include_dirs = xmalloc (lh->include_dirs_size
6565 * sizeof (*lh->include_dirs));
6567 else if (lh->num_include_dirs >= lh->include_dirs_size)
6569 lh->include_dirs_size *= 2;
6570 lh->include_dirs = xrealloc (lh->include_dirs,
6571 (lh->include_dirs_size
6572 * sizeof (*lh->include_dirs)));
6575 lh->include_dirs[lh->num_include_dirs++] = include_dir;
6579 /* Add an entry to LH's file name table. */
6581 add_file_name (struct line_header *lh,
6583 unsigned int dir_index,
6584 unsigned int mod_time,
6585 unsigned int length)
6587 struct file_entry *fe;
6589 /* Grow the array if necessary. */
6590 if (lh->file_names_size == 0)
6592 lh->file_names_size = 1; /* for testing */
6593 lh->file_names = xmalloc (lh->file_names_size
6594 * sizeof (*lh->file_names));
6596 else if (lh->num_file_names >= lh->file_names_size)
6598 lh->file_names_size *= 2;
6599 lh->file_names = xrealloc (lh->file_names,
6600 (lh->file_names_size
6601 * sizeof (*lh->file_names)));
6604 fe = &lh->file_names[lh->num_file_names++];
6606 fe->dir_index = dir_index;
6607 fe->mod_time = mod_time;
6608 fe->length = length;
6614 /* Read the statement program header starting at OFFSET in
6615 .debug_line, according to the endianness of ABFD. Return a pointer
6616 to a struct line_header, allocated using xmalloc.
6618 NOTE: the strings in the include directory and file name tables of
6619 the returned object point into debug_line_buffer, and must not be
6621 static struct line_header *
6622 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
6623 struct dwarf2_cu *cu)
6625 struct cleanup *back_to;
6626 struct line_header *lh;
6628 unsigned int bytes_read;
6630 char *cur_dir, *cur_file;
6632 if (dwarf2_per_objfile->line_buffer == NULL)
6634 complaint (&symfile_complaints, _("missing .debug_line section"));
6638 /* Make sure that at least there's room for the total_length field.
6639 That could be 12 bytes long, but we're just going to fudge that. */
6640 if (offset + 4 >= dwarf2_per_objfile->line_size)
6642 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6646 lh = xmalloc (sizeof (*lh));
6647 memset (lh, 0, sizeof (*lh));
6648 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
6651 line_ptr = dwarf2_per_objfile->line_buffer + offset;
6653 /* Read in the header. */
6655 read_initial_length (abfd, line_ptr, &cu->header, &bytes_read);
6656 line_ptr += bytes_read;
6657 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line_buffer
6658 + dwarf2_per_objfile->line_size))
6660 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6663 lh->statement_program_end = line_ptr + lh->total_length;
6664 lh->version = read_2_bytes (abfd, line_ptr);
6666 lh->header_length = read_offset (abfd, line_ptr, &cu->header, &bytes_read);
6667 line_ptr += bytes_read;
6668 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
6670 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
6672 lh->line_base = read_1_signed_byte (abfd, line_ptr);
6674 lh->line_range = read_1_byte (abfd, line_ptr);
6676 lh->opcode_base = read_1_byte (abfd, line_ptr);
6678 lh->standard_opcode_lengths
6679 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
6681 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
6682 for (i = 1; i < lh->opcode_base; ++i)
6684 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
6688 /* Read directory table. */
6689 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
6691 line_ptr += bytes_read;
6692 add_include_dir (lh, cur_dir);
6694 line_ptr += bytes_read;
6696 /* Read file name table. */
6697 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
6699 unsigned int dir_index, mod_time, length;
6701 line_ptr += bytes_read;
6702 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6703 line_ptr += bytes_read;
6704 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6705 line_ptr += bytes_read;
6706 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6707 line_ptr += bytes_read;
6709 add_file_name (lh, cur_file, dir_index, mod_time, length);
6711 line_ptr += bytes_read;
6712 lh->statement_program_start = line_ptr;
6714 if (line_ptr > (dwarf2_per_objfile->line_buffer
6715 + dwarf2_per_objfile->line_size))
6716 complaint (&symfile_complaints,
6717 _("line number info header doesn't fit in `.debug_line' section"));
6719 discard_cleanups (back_to);
6723 /* This function exists to work around a bug in certain compilers
6724 (particularly GCC 2.95), in which the first line number marker of a
6725 function does not show up until after the prologue, right before
6726 the second line number marker. This function shifts ADDRESS down
6727 to the beginning of the function if necessary, and is called on
6728 addresses passed to record_line. */
6731 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
6733 struct function_range *fn;
6735 /* Find the function_range containing address. */
6740 cu->cached_fn = cu->first_fn;
6744 if (fn->lowpc <= address && fn->highpc > address)
6750 while (fn && fn != cu->cached_fn)
6751 if (fn->lowpc <= address && fn->highpc > address)
6761 if (address != fn->lowpc)
6762 complaint (&symfile_complaints,
6763 _("misplaced first line number at 0x%lx for '%s'"),
6764 (unsigned long) address, fn->name);
6769 /* Decode the Line Number Program (LNP) for the given line_header
6770 structure and CU. The actual information extracted and the type
6771 of structures created from the LNP depends on the value of PST.
6773 1. If PST is NULL, then this procedure uses the data from the program
6774 to create all necessary symbol tables, and their linetables.
6775 The compilation directory of the file is passed in COMP_DIR,
6776 and must not be NULL.
6778 2. If PST is not NULL, this procedure reads the program to determine
6779 the list of files included by the unit represented by PST, and
6780 builds all the associated partial symbol tables. In this case,
6781 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6782 is not used to compute the full name of the symtab, and therefore
6783 omitting it when building the partial symtab does not introduce
6784 the potential for inconsistency - a partial symtab and its associated
6785 symbtab having a different fullname -). */
6788 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
6789 struct dwarf2_cu *cu, struct partial_symtab *pst)
6791 gdb_byte *line_ptr, *extended_end;
6793 unsigned int bytes_read, extended_len;
6794 unsigned char op_code, extended_op, adj_opcode;
6796 struct objfile *objfile = cu->objfile;
6797 const int decode_for_pst_p = (pst != NULL);
6798 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
6800 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6802 line_ptr = lh->statement_program_start;
6803 line_end = lh->statement_program_end;
6805 /* Read the statement sequences until there's nothing left. */
6806 while (line_ptr < line_end)
6808 /* state machine registers */
6809 CORE_ADDR address = 0;
6810 unsigned int file = 1;
6811 unsigned int line = 1;
6812 unsigned int column = 0;
6813 int is_stmt = lh->default_is_stmt;
6814 int basic_block = 0;
6815 int end_sequence = 0;
6817 if (!decode_for_pst_p && lh->num_file_names >= file)
6819 /* Start a subfile for the current file of the state machine. */
6820 /* lh->include_dirs and lh->file_names are 0-based, but the
6821 directory and file name numbers in the statement program
6823 struct file_entry *fe = &lh->file_names[file - 1];
6827 dir = lh->include_dirs[fe->dir_index - 1];
6829 dwarf2_start_subfile (fe->name, dir, comp_dir);
6832 /* Decode the table. */
6833 while (!end_sequence)
6835 op_code = read_1_byte (abfd, line_ptr);
6838 if (op_code >= lh->opcode_base)
6840 /* Special operand. */
6841 adj_opcode = op_code - lh->opcode_base;
6842 address += (adj_opcode / lh->line_range)
6843 * lh->minimum_instruction_length;
6844 line += lh->line_base + (adj_opcode % lh->line_range);
6845 if (lh->num_file_names < file)
6846 dwarf2_debug_line_missing_file_complaint ();
6849 lh->file_names[file - 1].included_p = 1;
6850 if (!decode_for_pst_p)
6852 if (last_subfile != current_subfile)
6855 record_line (last_subfile, 0, address);
6856 last_subfile = current_subfile;
6858 /* Append row to matrix using current values. */
6859 record_line (current_subfile, line,
6860 check_cu_functions (address, cu));
6865 else switch (op_code)
6867 case DW_LNS_extended_op:
6868 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6869 line_ptr += bytes_read;
6870 extended_end = line_ptr + extended_len;
6871 extended_op = read_1_byte (abfd, line_ptr);
6873 switch (extended_op)
6875 case DW_LNE_end_sequence:
6878 if (lh->num_file_names < file)
6879 dwarf2_debug_line_missing_file_complaint ();
6882 lh->file_names[file - 1].included_p = 1;
6883 if (!decode_for_pst_p)
6884 record_line (current_subfile, 0, address);
6887 case DW_LNE_set_address:
6888 address = read_address (abfd, line_ptr, cu, &bytes_read);
6889 line_ptr += bytes_read;
6890 address += baseaddr;
6892 case DW_LNE_define_file:
6895 unsigned int dir_index, mod_time, length;
6897 cur_file = read_string (abfd, line_ptr, &bytes_read);
6898 line_ptr += bytes_read;
6900 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6901 line_ptr += bytes_read;
6903 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6904 line_ptr += bytes_read;
6906 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6907 line_ptr += bytes_read;
6908 add_file_name (lh, cur_file, dir_index, mod_time, length);
6912 complaint (&symfile_complaints,
6913 _("mangled .debug_line section"));
6916 /* Make sure that we parsed the extended op correctly. If e.g.
6917 we expected a different address size than the producer used,
6918 we may have read the wrong number of bytes. */
6919 if (line_ptr != extended_end)
6921 complaint (&symfile_complaints,
6922 _("mangled .debug_line section"));
6927 if (lh->num_file_names < file)
6928 dwarf2_debug_line_missing_file_complaint ();
6931 lh->file_names[file - 1].included_p = 1;
6932 if (!decode_for_pst_p)
6934 if (last_subfile != current_subfile)
6937 record_line (last_subfile, 0, address);
6938 last_subfile = current_subfile;
6940 record_line (current_subfile, line,
6941 check_cu_functions (address, cu));
6946 case DW_LNS_advance_pc:
6947 address += lh->minimum_instruction_length
6948 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6949 line_ptr += bytes_read;
6951 case DW_LNS_advance_line:
6952 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
6953 line_ptr += bytes_read;
6955 case DW_LNS_set_file:
6957 /* The arrays lh->include_dirs and lh->file_names are
6958 0-based, but the directory and file name numbers in
6959 the statement program are 1-based. */
6960 struct file_entry *fe;
6963 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6964 line_ptr += bytes_read;
6965 if (lh->num_file_names < file)
6966 dwarf2_debug_line_missing_file_complaint ();
6969 fe = &lh->file_names[file - 1];
6971 dir = lh->include_dirs[fe->dir_index - 1];
6972 if (!decode_for_pst_p)
6974 last_subfile = current_subfile;
6975 dwarf2_start_subfile (fe->name, dir, comp_dir);
6980 case DW_LNS_set_column:
6981 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6982 line_ptr += bytes_read;
6984 case DW_LNS_negate_stmt:
6985 is_stmt = (!is_stmt);
6987 case DW_LNS_set_basic_block:
6990 /* Add to the address register of the state machine the
6991 address increment value corresponding to special opcode
6992 255. I.e., this value is scaled by the minimum
6993 instruction length since special opcode 255 would have
6994 scaled the the increment. */
6995 case DW_LNS_const_add_pc:
6996 address += (lh->minimum_instruction_length
6997 * ((255 - lh->opcode_base) / lh->line_range));
6999 case DW_LNS_fixed_advance_pc:
7000 address += read_2_bytes (abfd, line_ptr);
7005 /* Unknown standard opcode, ignore it. */
7008 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
7010 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7011 line_ptr += bytes_read;
7018 if (decode_for_pst_p)
7022 /* Now that we're done scanning the Line Header Program, we can
7023 create the psymtab of each included file. */
7024 for (file_index = 0; file_index < lh->num_file_names; file_index++)
7025 if (lh->file_names[file_index].included_p == 1)
7027 const struct file_entry fe = lh->file_names [file_index];
7028 char *include_name = fe.name;
7029 char *dir_name = NULL;
7030 char *pst_filename = pst->filename;
7033 dir_name = lh->include_dirs[fe.dir_index - 1];
7035 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
7037 include_name = concat (dir_name, SLASH_STRING,
7038 include_name, (char *)NULL);
7039 make_cleanup (xfree, include_name);
7042 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
7044 pst_filename = concat (pst->dirname, SLASH_STRING,
7045 pst_filename, (char *)NULL);
7046 make_cleanup (xfree, pst_filename);
7049 if (strcmp (include_name, pst_filename) != 0)
7050 dwarf2_create_include_psymtab (include_name, pst, objfile);
7055 /* Make sure a symtab is created for every file, even files
7056 which contain only variables (i.e. no code with associated
7060 struct file_entry *fe;
7062 for (i = 0; i < lh->num_file_names; i++)
7065 fe = &lh->file_names[i];
7067 dir = lh->include_dirs[fe->dir_index - 1];
7068 dwarf2_start_subfile (fe->name, dir, comp_dir);
7070 /* Skip the main file; we don't need it, and it must be
7071 allocated last, so that it will show up before the
7072 non-primary symtabs in the objfile's symtab list. */
7073 if (current_subfile == first_subfile)
7076 if (current_subfile->symtab == NULL)
7077 current_subfile->symtab = allocate_symtab (current_subfile->name,
7079 fe->symtab = current_subfile->symtab;
7084 /* Start a subfile for DWARF. FILENAME is the name of the file and
7085 DIRNAME the name of the source directory which contains FILENAME
7086 or NULL if not known. COMP_DIR is the compilation directory for the
7087 linetable's compilation unit or NULL if not known.
7088 This routine tries to keep line numbers from identical absolute and
7089 relative file names in a common subfile.
7091 Using the `list' example from the GDB testsuite, which resides in
7092 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7093 of /srcdir/list0.c yields the following debugging information for list0.c:
7095 DW_AT_name: /srcdir/list0.c
7096 DW_AT_comp_dir: /compdir
7097 files.files[0].name: list0.h
7098 files.files[0].dir: /srcdir
7099 files.files[1].name: list0.c
7100 files.files[1].dir: /srcdir
7102 The line number information for list0.c has to end up in a single
7103 subfile, so that `break /srcdir/list0.c:1' works as expected.
7104 start_subfile will ensure that this happens provided that we pass the
7105 concatenation of files.files[1].dir and files.files[1].name as the
7109 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
7113 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7114 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7115 second argument to start_subfile. To be consistent, we do the
7116 same here. In order not to lose the line information directory,
7117 we concatenate it to the filename when it makes sense.
7118 Note that the Dwarf3 standard says (speaking of filenames in line
7119 information): ``The directory index is ignored for file names
7120 that represent full path names''. Thus ignoring dirname in the
7121 `else' branch below isn't an issue. */
7123 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
7124 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
7126 fullname = filename;
7128 start_subfile (fullname, comp_dir);
7130 if (fullname != filename)
7135 var_decode_location (struct attribute *attr, struct symbol *sym,
7136 struct dwarf2_cu *cu)
7138 struct objfile *objfile = cu->objfile;
7139 struct comp_unit_head *cu_header = &cu->header;
7141 /* NOTE drow/2003-01-30: There used to be a comment and some special
7142 code here to turn a symbol with DW_AT_external and a
7143 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7144 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7145 with some versions of binutils) where shared libraries could have
7146 relocations against symbols in their debug information - the
7147 minimal symbol would have the right address, but the debug info
7148 would not. It's no longer necessary, because we will explicitly
7149 apply relocations when we read in the debug information now. */
7151 /* A DW_AT_location attribute with no contents indicates that a
7152 variable has been optimized away. */
7153 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
7155 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
7159 /* Handle one degenerate form of location expression specially, to
7160 preserve GDB's previous behavior when section offsets are
7161 specified. If this is just a DW_OP_addr then mark this symbol
7164 if (attr_form_is_block (attr)
7165 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
7166 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
7170 SYMBOL_VALUE_ADDRESS (sym) =
7171 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
7172 fixup_symbol_section (sym, objfile);
7173 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
7174 SYMBOL_SECTION (sym));
7175 SYMBOL_CLASS (sym) = LOC_STATIC;
7179 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7180 expression evaluator, and use LOC_COMPUTED only when necessary
7181 (i.e. when the value of a register or memory location is
7182 referenced, or a thread-local block, etc.). Then again, it might
7183 not be worthwhile. I'm assuming that it isn't unless performance
7184 or memory numbers show me otherwise. */
7186 dwarf2_symbol_mark_computed (attr, sym, cu);
7187 SYMBOL_CLASS (sym) = LOC_COMPUTED;
7190 /* Given a pointer to a DWARF information entry, figure out if we need
7191 to make a symbol table entry for it, and if so, create a new entry
7192 and return a pointer to it.
7193 If TYPE is NULL, determine symbol type from the die, otherwise
7194 used the passed type. */
7196 static struct symbol *
7197 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
7199 struct objfile *objfile = cu->objfile;
7200 struct symbol *sym = NULL;
7202 struct attribute *attr = NULL;
7203 struct attribute *attr2 = NULL;
7206 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7208 if (die->tag != DW_TAG_namespace)
7209 name = dwarf2_linkage_name (die, cu);
7211 name = TYPE_NAME (type);
7215 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
7216 sizeof (struct symbol));
7217 OBJSTAT (objfile, n_syms++);
7218 memset (sym, 0, sizeof (struct symbol));
7220 /* Cache this symbol's name and the name's demangled form (if any). */
7221 SYMBOL_LANGUAGE (sym) = cu->language;
7222 SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
7224 /* Default assumptions.
7225 Use the passed type or decode it from the die. */
7226 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7227 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
7229 SYMBOL_TYPE (sym) = type;
7231 SYMBOL_TYPE (sym) = die_type (die, cu);
7232 attr = dwarf2_attr (die, DW_AT_decl_line, cu);
7235 SYMBOL_LINE (sym) = DW_UNSND (attr);
7238 attr = dwarf2_attr (die, DW_AT_decl_file, cu);
7241 int file_index = DW_UNSND (attr);
7242 if (cu->line_header == NULL
7243 || file_index > cu->line_header->num_file_names)
7244 complaint (&symfile_complaints,
7245 _("file index out of range"));
7246 else if (file_index > 0)
7248 struct file_entry *fe;
7249 fe = &cu->line_header->file_names[file_index - 1];
7250 SYMBOL_SYMTAB (sym) = fe->symtab;
7257 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
7260 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
7262 SYMBOL_CLASS (sym) = LOC_LABEL;
7264 case DW_TAG_subprogram:
7265 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7267 SYMBOL_CLASS (sym) = LOC_BLOCK;
7268 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7269 if (attr2 && (DW_UNSND (attr2) != 0))
7271 add_symbol_to_list (sym, &global_symbols);
7275 add_symbol_to_list (sym, cu->list_in_scope);
7278 case DW_TAG_variable:
7279 /* Compilation with minimal debug info may result in variables
7280 with missing type entries. Change the misleading `void' type
7281 to something sensible. */
7282 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
7284 = builtin_type (current_gdbarch)->nodebug_data_symbol;
7286 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7289 dwarf2_const_value (attr, sym, cu);
7290 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7291 if (attr2 && (DW_UNSND (attr2) != 0))
7292 add_symbol_to_list (sym, &global_symbols);
7294 add_symbol_to_list (sym, cu->list_in_scope);
7297 attr = dwarf2_attr (die, DW_AT_location, cu);
7300 var_decode_location (attr, sym, cu);
7301 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7302 if (attr2 && (DW_UNSND (attr2) != 0))
7303 add_symbol_to_list (sym, &global_symbols);
7305 add_symbol_to_list (sym, cu->list_in_scope);
7309 /* We do not know the address of this symbol.
7310 If it is an external symbol and we have type information
7311 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7312 The address of the variable will then be determined from
7313 the minimal symbol table whenever the variable is
7315 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7316 if (attr2 && (DW_UNSND (attr2) != 0)
7317 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
7319 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
7320 add_symbol_to_list (sym, &global_symbols);
7324 case DW_TAG_formal_parameter:
7325 attr = dwarf2_attr (die, DW_AT_location, cu);
7328 var_decode_location (attr, sym, cu);
7329 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7330 if (SYMBOL_CLASS (sym) == LOC_COMPUTED)
7331 SYMBOL_CLASS (sym) = LOC_COMPUTED_ARG;
7333 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7336 dwarf2_const_value (attr, sym, cu);
7338 add_symbol_to_list (sym, cu->list_in_scope);
7340 case DW_TAG_unspecified_parameters:
7341 /* From varargs functions; gdb doesn't seem to have any
7342 interest in this information, so just ignore it for now.
7345 case DW_TAG_class_type:
7346 case DW_TAG_structure_type:
7347 case DW_TAG_union_type:
7348 case DW_TAG_set_type:
7349 case DW_TAG_enumeration_type:
7350 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7351 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
7353 /* Make sure that the symbol includes appropriate enclosing
7354 classes/namespaces in its name. These are calculated in
7355 read_structure_type, and the correct name is saved in
7358 if (cu->language == language_cplus
7359 || cu->language == language_java)
7361 struct type *type = SYMBOL_TYPE (sym);
7363 if (TYPE_TAG_NAME (type) != NULL)
7365 /* FIXME: carlton/2003-11-10: Should this use
7366 SYMBOL_SET_NAMES instead? (The same problem also
7367 arises further down in this function.) */
7368 /* The type's name is already allocated along with
7369 this objfile, so we don't need to duplicate it
7371 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
7376 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7377 really ever be static objects: otherwise, if you try
7378 to, say, break of a class's method and you're in a file
7379 which doesn't mention that class, it won't work unless
7380 the check for all static symbols in lookup_symbol_aux
7381 saves you. See the OtherFileClass tests in
7382 gdb.c++/namespace.exp. */
7384 struct pending **list_to_add;
7386 list_to_add = (cu->list_in_scope == &file_symbols
7387 && (cu->language == language_cplus
7388 || cu->language == language_java)
7389 ? &global_symbols : cu->list_in_scope);
7391 add_symbol_to_list (sym, list_to_add);
7393 /* The semantics of C++ state that "struct foo { ... }" also
7394 defines a typedef for "foo". A Java class declaration also
7395 defines a typedef for the class. Synthesize a typedef symbol
7396 so that "ptype foo" works as expected. */
7397 if (cu->language == language_cplus
7398 || cu->language == language_java
7399 || cu->language == language_ada)
7401 struct symbol *typedef_sym = (struct symbol *)
7402 obstack_alloc (&objfile->objfile_obstack,
7403 sizeof (struct symbol));
7404 *typedef_sym = *sym;
7405 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
7406 /* The symbol's name is already allocated along with
7407 this objfile, so we don't need to duplicate it for
7409 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
7410 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
7411 add_symbol_to_list (typedef_sym, list_to_add);
7415 case DW_TAG_typedef:
7416 if (processing_has_namespace_info
7417 && processing_current_prefix[0] != '\0')
7419 SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
7420 processing_current_prefix,
7423 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7424 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7425 add_symbol_to_list (sym, cu->list_in_scope);
7427 case DW_TAG_base_type:
7428 case DW_TAG_subrange_type:
7429 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7430 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7431 add_symbol_to_list (sym, cu->list_in_scope);
7433 case DW_TAG_enumerator:
7434 if (processing_has_namespace_info
7435 && processing_current_prefix[0] != '\0')
7437 SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
7438 processing_current_prefix,
7441 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7444 dwarf2_const_value (attr, sym, cu);
7447 /* NOTE: carlton/2003-11-10: See comment above in the
7448 DW_TAG_class_type, etc. block. */
7450 struct pending **list_to_add;
7452 list_to_add = (cu->list_in_scope == &file_symbols
7453 && (cu->language == language_cplus
7454 || cu->language == language_java)
7455 ? &global_symbols : cu->list_in_scope);
7457 add_symbol_to_list (sym, list_to_add);
7460 case DW_TAG_namespace:
7461 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7462 add_symbol_to_list (sym, &global_symbols);
7465 /* Not a tag we recognize. Hopefully we aren't processing
7466 trash data, but since we must specifically ignore things
7467 we don't recognize, there is nothing else we should do at
7469 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
7470 dwarf_tag_name (die->tag));
7477 /* Copy constant value from an attribute to a symbol. */
7480 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
7481 struct dwarf2_cu *cu)
7483 struct objfile *objfile = cu->objfile;
7484 struct comp_unit_head *cu_header = &cu->header;
7485 struct dwarf_block *blk;
7490 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
7491 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
7492 cu_header->addr_size,
7493 TYPE_LENGTH (SYMBOL_TYPE
7495 SYMBOL_VALUE_BYTES (sym) =
7496 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
7497 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7498 it's body - store_unsigned_integer. */
7499 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
7501 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
7503 case DW_FORM_block1:
7504 case DW_FORM_block2:
7505 case DW_FORM_block4:
7507 blk = DW_BLOCK (attr);
7508 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
7509 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
7511 TYPE_LENGTH (SYMBOL_TYPE
7513 SYMBOL_VALUE_BYTES (sym) =
7514 obstack_alloc (&objfile->objfile_obstack, blk->size);
7515 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
7516 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
7519 /* The DW_AT_const_value attributes are supposed to carry the
7520 symbol's value "represented as it would be on the target
7521 architecture." By the time we get here, it's already been
7522 converted to host endianness, so we just need to sign- or
7523 zero-extend it as appropriate. */
7525 dwarf2_const_value_data (attr, sym, 8);
7528 dwarf2_const_value_data (attr, sym, 16);
7531 dwarf2_const_value_data (attr, sym, 32);
7534 dwarf2_const_value_data (attr, sym, 64);
7538 SYMBOL_VALUE (sym) = DW_SND (attr);
7539 SYMBOL_CLASS (sym) = LOC_CONST;
7543 SYMBOL_VALUE (sym) = DW_UNSND (attr);
7544 SYMBOL_CLASS (sym) = LOC_CONST;
7548 complaint (&symfile_complaints,
7549 _("unsupported const value attribute form: '%s'"),
7550 dwarf_form_name (attr->form));
7551 SYMBOL_VALUE (sym) = 0;
7552 SYMBOL_CLASS (sym) = LOC_CONST;
7558 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7559 or zero-extend it as appropriate for the symbol's type. */
7561 dwarf2_const_value_data (struct attribute *attr,
7565 LONGEST l = DW_UNSND (attr);
7567 if (bits < sizeof (l) * 8)
7569 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
7570 l &= ((LONGEST) 1 << bits) - 1;
7572 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
7575 SYMBOL_VALUE (sym) = l;
7576 SYMBOL_CLASS (sym) = LOC_CONST;
7580 /* Return the type of the die in question using its DW_AT_type attribute. */
7582 static struct type *
7583 die_type (struct die_info *die, struct dwarf2_cu *cu)
7586 struct attribute *type_attr;
7587 struct die_info *type_die;
7589 type_attr = dwarf2_attr (die, DW_AT_type, cu);
7592 /* A missing DW_AT_type represents a void type. */
7593 return builtin_type (current_gdbarch)->builtin_void;
7596 type_die = follow_die_ref (die, type_attr, cu);
7598 type = tag_type_to_type (type_die, cu);
7601 dump_die (type_die);
7602 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7608 /* Return the containing type of the die in question using its
7609 DW_AT_containing_type attribute. */
7611 static struct type *
7612 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
7614 struct type *type = NULL;
7615 struct attribute *type_attr;
7616 struct die_info *type_die = NULL;
7618 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
7621 type_die = follow_die_ref (die, type_attr, cu);
7622 type = tag_type_to_type (type_die, cu);
7627 dump_die (type_die);
7628 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7634 static struct type *
7635 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
7643 read_type_die (die, cu);
7647 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7655 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
7657 char *prefix = determine_prefix (die, cu);
7658 const char *old_prefix = processing_current_prefix;
7659 struct cleanup *back_to = make_cleanup (xfree, prefix);
7660 processing_current_prefix = prefix;
7664 case DW_TAG_class_type:
7665 case DW_TAG_structure_type:
7666 case DW_TAG_union_type:
7667 read_structure_type (die, cu);
7669 case DW_TAG_enumeration_type:
7670 read_enumeration_type (die, cu);
7672 case DW_TAG_subprogram:
7673 case DW_TAG_subroutine_type:
7674 read_subroutine_type (die, cu);
7676 case DW_TAG_array_type:
7677 read_array_type (die, cu);
7679 case DW_TAG_set_type:
7680 read_set_type (die, cu);
7682 case DW_TAG_pointer_type:
7683 read_tag_pointer_type (die, cu);
7685 case DW_TAG_ptr_to_member_type:
7686 read_tag_ptr_to_member_type (die, cu);
7688 case DW_TAG_reference_type:
7689 read_tag_reference_type (die, cu);
7691 case DW_TAG_const_type:
7692 read_tag_const_type (die, cu);
7694 case DW_TAG_volatile_type:
7695 read_tag_volatile_type (die, cu);
7697 case DW_TAG_string_type:
7698 read_tag_string_type (die, cu);
7700 case DW_TAG_typedef:
7701 read_typedef (die, cu);
7703 case DW_TAG_subrange_type:
7704 read_subrange_type (die, cu);
7706 case DW_TAG_base_type:
7707 read_base_type (die, cu);
7709 case DW_TAG_unspecified_type:
7710 read_unspecified_type (die, cu);
7713 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
7714 dwarf_tag_name (die->tag));
7718 processing_current_prefix = old_prefix;
7719 do_cleanups (back_to);
7722 /* Return the name of the namespace/class that DIE is defined within,
7723 or "" if we can't tell. The caller should xfree the result. */
7725 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7726 therein) for an example of how to use this function to deal with
7727 DW_AT_specification. */
7730 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
7732 struct die_info *parent;
7734 if (cu->language != language_cplus
7735 && cu->language != language_java)
7738 parent = die->parent;
7742 return xstrdup ("");
7746 switch (parent->tag) {
7747 case DW_TAG_namespace:
7749 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7750 before doing this check? */
7751 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
7753 return xstrdup (TYPE_TAG_NAME (parent->type));
7758 char *parent_prefix = determine_prefix (parent, cu);
7759 char *retval = typename_concat (NULL, parent_prefix,
7760 namespace_name (parent, &dummy,
7763 xfree (parent_prefix);
7768 case DW_TAG_class_type:
7769 case DW_TAG_structure_type:
7771 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
7773 return xstrdup (TYPE_TAG_NAME (parent->type));
7777 const char *old_prefix = processing_current_prefix;
7778 char *new_prefix = determine_prefix (parent, cu);
7781 processing_current_prefix = new_prefix;
7782 retval = determine_class_name (parent, cu);
7783 processing_current_prefix = old_prefix;
7790 return determine_prefix (parent, cu);
7795 /* Return a newly-allocated string formed by concatenating PREFIX and
7796 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7797 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7798 perform an obconcat, otherwise allocate storage for the result. The CU argument
7799 is used to determine the language and hence, the appropriate separator. */
7801 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7804 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
7805 struct dwarf2_cu *cu)
7809 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
7811 else if (cu->language == language_java)
7818 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
7823 strcpy (retval, prefix);
7824 strcat (retval, sep);
7827 strcat (retval, suffix);
7833 /* We have an obstack. */
7834 return obconcat (obs, prefix, sep, suffix);
7840 copy_die (struct die_info *old_die)
7842 struct die_info *new_die;
7845 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
7846 memset (new_die, 0, sizeof (struct die_info));
7848 new_die->tag = old_die->tag;
7849 new_die->has_children = old_die->has_children;
7850 new_die->abbrev = old_die->abbrev;
7851 new_die->offset = old_die->offset;
7852 new_die->type = NULL;
7854 num_attrs = old_die->num_attrs;
7855 new_die->num_attrs = num_attrs;
7856 new_die->attrs = (struct attribute *)
7857 xmalloc (num_attrs * sizeof (struct attribute));
7859 for (i = 0; i < old_die->num_attrs; ++i)
7861 new_die->attrs[i].name = old_die->attrs[i].name;
7862 new_die->attrs[i].form = old_die->attrs[i].form;
7863 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
7866 new_die->next = NULL;
7871 /* Return sibling of die, NULL if no sibling. */
7873 static struct die_info *
7874 sibling_die (struct die_info *die)
7876 return die->sibling;
7879 /* Get linkage name of a die, return NULL if not found. */
7882 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
7884 struct attribute *attr;
7886 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7887 if (attr && DW_STRING (attr))
7888 return DW_STRING (attr);
7889 attr = dwarf2_attr (die, DW_AT_name, cu);
7890 if (attr && DW_STRING (attr))
7891 return DW_STRING (attr);
7895 /* Get name of a die, return NULL if not found. */
7898 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
7900 struct attribute *attr;
7902 attr = dwarf2_attr (die, DW_AT_name, cu);
7903 if (attr && DW_STRING (attr))
7904 return DW_STRING (attr);
7908 /* Return the die that this die in an extension of, or NULL if there
7911 static struct die_info *
7912 dwarf2_extension (struct die_info *die, struct dwarf2_cu *cu)
7914 struct attribute *attr;
7916 attr = dwarf2_attr (die, DW_AT_extension, cu);
7920 return follow_die_ref (die, attr, cu);
7923 /* Convert a DIE tag into its string name. */
7926 dwarf_tag_name (unsigned tag)
7930 case DW_TAG_padding:
7931 return "DW_TAG_padding";
7932 case DW_TAG_array_type:
7933 return "DW_TAG_array_type";
7934 case DW_TAG_class_type:
7935 return "DW_TAG_class_type";
7936 case DW_TAG_entry_point:
7937 return "DW_TAG_entry_point";
7938 case DW_TAG_enumeration_type:
7939 return "DW_TAG_enumeration_type";
7940 case DW_TAG_formal_parameter:
7941 return "DW_TAG_formal_parameter";
7942 case DW_TAG_imported_declaration:
7943 return "DW_TAG_imported_declaration";
7945 return "DW_TAG_label";
7946 case DW_TAG_lexical_block:
7947 return "DW_TAG_lexical_block";
7949 return "DW_TAG_member";
7950 case DW_TAG_pointer_type:
7951 return "DW_TAG_pointer_type";
7952 case DW_TAG_reference_type:
7953 return "DW_TAG_reference_type";
7954 case DW_TAG_compile_unit:
7955 return "DW_TAG_compile_unit";
7956 case DW_TAG_string_type:
7957 return "DW_TAG_string_type";
7958 case DW_TAG_structure_type:
7959 return "DW_TAG_structure_type";
7960 case DW_TAG_subroutine_type:
7961 return "DW_TAG_subroutine_type";
7962 case DW_TAG_typedef:
7963 return "DW_TAG_typedef";
7964 case DW_TAG_union_type:
7965 return "DW_TAG_union_type";
7966 case DW_TAG_unspecified_parameters:
7967 return "DW_TAG_unspecified_parameters";
7968 case DW_TAG_variant:
7969 return "DW_TAG_variant";
7970 case DW_TAG_common_block:
7971 return "DW_TAG_common_block";
7972 case DW_TAG_common_inclusion:
7973 return "DW_TAG_common_inclusion";
7974 case DW_TAG_inheritance:
7975 return "DW_TAG_inheritance";
7976 case DW_TAG_inlined_subroutine:
7977 return "DW_TAG_inlined_subroutine";
7979 return "DW_TAG_module";
7980 case DW_TAG_ptr_to_member_type:
7981 return "DW_TAG_ptr_to_member_type";
7982 case DW_TAG_set_type:
7983 return "DW_TAG_set_type";
7984 case DW_TAG_subrange_type:
7985 return "DW_TAG_subrange_type";
7986 case DW_TAG_with_stmt:
7987 return "DW_TAG_with_stmt";
7988 case DW_TAG_access_declaration:
7989 return "DW_TAG_access_declaration";
7990 case DW_TAG_base_type:
7991 return "DW_TAG_base_type";
7992 case DW_TAG_catch_block:
7993 return "DW_TAG_catch_block";
7994 case DW_TAG_const_type:
7995 return "DW_TAG_const_type";
7996 case DW_TAG_constant:
7997 return "DW_TAG_constant";
7998 case DW_TAG_enumerator:
7999 return "DW_TAG_enumerator";
8000 case DW_TAG_file_type:
8001 return "DW_TAG_file_type";
8003 return "DW_TAG_friend";
8004 case DW_TAG_namelist:
8005 return "DW_TAG_namelist";
8006 case DW_TAG_namelist_item:
8007 return "DW_TAG_namelist_item";
8008 case DW_TAG_packed_type:
8009 return "DW_TAG_packed_type";
8010 case DW_TAG_subprogram:
8011 return "DW_TAG_subprogram";
8012 case DW_TAG_template_type_param:
8013 return "DW_TAG_template_type_param";
8014 case DW_TAG_template_value_param:
8015 return "DW_TAG_template_value_param";
8016 case DW_TAG_thrown_type:
8017 return "DW_TAG_thrown_type";
8018 case DW_TAG_try_block:
8019 return "DW_TAG_try_block";
8020 case DW_TAG_variant_part:
8021 return "DW_TAG_variant_part";
8022 case DW_TAG_variable:
8023 return "DW_TAG_variable";
8024 case DW_TAG_volatile_type:
8025 return "DW_TAG_volatile_type";
8026 case DW_TAG_dwarf_procedure:
8027 return "DW_TAG_dwarf_procedure";
8028 case DW_TAG_restrict_type:
8029 return "DW_TAG_restrict_type";
8030 case DW_TAG_interface_type:
8031 return "DW_TAG_interface_type";
8032 case DW_TAG_namespace:
8033 return "DW_TAG_namespace";
8034 case DW_TAG_imported_module:
8035 return "DW_TAG_imported_module";
8036 case DW_TAG_unspecified_type:
8037 return "DW_TAG_unspecified_type";
8038 case DW_TAG_partial_unit:
8039 return "DW_TAG_partial_unit";
8040 case DW_TAG_imported_unit:
8041 return "DW_TAG_imported_unit";
8042 case DW_TAG_condition:
8043 return "DW_TAG_condition";
8044 case DW_TAG_shared_type:
8045 return "DW_TAG_shared_type";
8046 case DW_TAG_MIPS_loop:
8047 return "DW_TAG_MIPS_loop";
8048 case DW_TAG_HP_array_descriptor:
8049 return "DW_TAG_HP_array_descriptor";
8050 case DW_TAG_format_label:
8051 return "DW_TAG_format_label";
8052 case DW_TAG_function_template:
8053 return "DW_TAG_function_template";
8054 case DW_TAG_class_template:
8055 return "DW_TAG_class_template";
8056 case DW_TAG_GNU_BINCL:
8057 return "DW_TAG_GNU_BINCL";
8058 case DW_TAG_GNU_EINCL:
8059 return "DW_TAG_GNU_EINCL";
8060 case DW_TAG_upc_shared_type:
8061 return "DW_TAG_upc_shared_type";
8062 case DW_TAG_upc_strict_type:
8063 return "DW_TAG_upc_strict_type";
8064 case DW_TAG_upc_relaxed_type:
8065 return "DW_TAG_upc_relaxed_type";
8066 case DW_TAG_PGI_kanji_type:
8067 return "DW_TAG_PGI_kanji_type";
8068 case DW_TAG_PGI_interface_block:
8069 return "DW_TAG_PGI_interface_block";
8071 return "DW_TAG_<unknown>";
8075 /* Convert a DWARF attribute code into its string name. */
8078 dwarf_attr_name (unsigned attr)
8083 return "DW_AT_sibling";
8084 case DW_AT_location:
8085 return "DW_AT_location";
8087 return "DW_AT_name";
8088 case DW_AT_ordering:
8089 return "DW_AT_ordering";
8090 case DW_AT_subscr_data:
8091 return "DW_AT_subscr_data";
8092 case DW_AT_byte_size:
8093 return "DW_AT_byte_size";
8094 case DW_AT_bit_offset:
8095 return "DW_AT_bit_offset";
8096 case DW_AT_bit_size:
8097 return "DW_AT_bit_size";
8098 case DW_AT_element_list:
8099 return "DW_AT_element_list";
8100 case DW_AT_stmt_list:
8101 return "DW_AT_stmt_list";
8103 return "DW_AT_low_pc";
8105 return "DW_AT_high_pc";
8106 case DW_AT_language:
8107 return "DW_AT_language";
8109 return "DW_AT_member";
8111 return "DW_AT_discr";
8112 case DW_AT_discr_value:
8113 return "DW_AT_discr_value";
8114 case DW_AT_visibility:
8115 return "DW_AT_visibility";
8117 return "DW_AT_import";
8118 case DW_AT_string_length:
8119 return "DW_AT_string_length";
8120 case DW_AT_common_reference:
8121 return "DW_AT_common_reference";
8122 case DW_AT_comp_dir:
8123 return "DW_AT_comp_dir";
8124 case DW_AT_const_value:
8125 return "DW_AT_const_value";
8126 case DW_AT_containing_type:
8127 return "DW_AT_containing_type";
8128 case DW_AT_default_value:
8129 return "DW_AT_default_value";
8131 return "DW_AT_inline";
8132 case DW_AT_is_optional:
8133 return "DW_AT_is_optional";
8134 case DW_AT_lower_bound:
8135 return "DW_AT_lower_bound";
8136 case DW_AT_producer:
8137 return "DW_AT_producer";
8138 case DW_AT_prototyped:
8139 return "DW_AT_prototyped";
8140 case DW_AT_return_addr:
8141 return "DW_AT_return_addr";
8142 case DW_AT_start_scope:
8143 return "DW_AT_start_scope";
8144 case DW_AT_stride_size:
8145 return "DW_AT_stride_size";
8146 case DW_AT_upper_bound:
8147 return "DW_AT_upper_bound";
8148 case DW_AT_abstract_origin:
8149 return "DW_AT_abstract_origin";
8150 case DW_AT_accessibility:
8151 return "DW_AT_accessibility";
8152 case DW_AT_address_class:
8153 return "DW_AT_address_class";
8154 case DW_AT_artificial:
8155 return "DW_AT_artificial";
8156 case DW_AT_base_types:
8157 return "DW_AT_base_types";
8158 case DW_AT_calling_convention:
8159 return "DW_AT_calling_convention";
8161 return "DW_AT_count";
8162 case DW_AT_data_member_location:
8163 return "DW_AT_data_member_location";
8164 case DW_AT_decl_column:
8165 return "DW_AT_decl_column";
8166 case DW_AT_decl_file:
8167 return "DW_AT_decl_file";
8168 case DW_AT_decl_line:
8169 return "DW_AT_decl_line";
8170 case DW_AT_declaration:
8171 return "DW_AT_declaration";
8172 case DW_AT_discr_list:
8173 return "DW_AT_discr_list";
8174 case DW_AT_encoding:
8175 return "DW_AT_encoding";
8176 case DW_AT_external:
8177 return "DW_AT_external";
8178 case DW_AT_frame_base:
8179 return "DW_AT_frame_base";
8181 return "DW_AT_friend";
8182 case DW_AT_identifier_case:
8183 return "DW_AT_identifier_case";
8184 case DW_AT_macro_info:
8185 return "DW_AT_macro_info";
8186 case DW_AT_namelist_items:
8187 return "DW_AT_namelist_items";
8188 case DW_AT_priority:
8189 return "DW_AT_priority";
8191 return "DW_AT_segment";
8192 case DW_AT_specification:
8193 return "DW_AT_specification";
8194 case DW_AT_static_link:
8195 return "DW_AT_static_link";
8197 return "DW_AT_type";
8198 case DW_AT_use_location:
8199 return "DW_AT_use_location";
8200 case DW_AT_variable_parameter:
8201 return "DW_AT_variable_parameter";
8202 case DW_AT_virtuality:
8203 return "DW_AT_virtuality";
8204 case DW_AT_vtable_elem_location:
8205 return "DW_AT_vtable_elem_location";
8206 /* DWARF 3 values. */
8207 case DW_AT_allocated:
8208 return "DW_AT_allocated";
8209 case DW_AT_associated:
8210 return "DW_AT_associated";
8211 case DW_AT_data_location:
8212 return "DW_AT_data_location";
8214 return "DW_AT_stride";
8215 case DW_AT_entry_pc:
8216 return "DW_AT_entry_pc";
8217 case DW_AT_use_UTF8:
8218 return "DW_AT_use_UTF8";
8219 case DW_AT_extension:
8220 return "DW_AT_extension";
8222 return "DW_AT_ranges";
8223 case DW_AT_trampoline:
8224 return "DW_AT_trampoline";
8225 case DW_AT_call_column:
8226 return "DW_AT_call_column";
8227 case DW_AT_call_file:
8228 return "DW_AT_call_file";
8229 case DW_AT_call_line:
8230 return "DW_AT_call_line";
8231 case DW_AT_description:
8232 return "DW_AT_description";
8233 case DW_AT_binary_scale:
8234 return "DW_AT_binary_scale";
8235 case DW_AT_decimal_scale:
8236 return "DW_AT_decimal_scale";
8238 return "DW_AT_small";
8239 case DW_AT_decimal_sign:
8240 return "DW_AT_decimal_sign";
8241 case DW_AT_digit_count:
8242 return "DW_AT_digit_count";
8243 case DW_AT_picture_string:
8244 return "DW_AT_picture_string";
8246 return "DW_AT_mutable";
8247 case DW_AT_threads_scaled:
8248 return "DW_AT_threads_scaled";
8249 case DW_AT_explicit:
8250 return "DW_AT_explicit";
8251 case DW_AT_object_pointer:
8252 return "DW_AT_object_pointer";
8253 case DW_AT_endianity:
8254 return "DW_AT_endianity";
8255 case DW_AT_elemental:
8256 return "DW_AT_elemental";
8258 return "DW_AT_pure";
8259 case DW_AT_recursive:
8260 return "DW_AT_recursive";
8262 /* SGI/MIPS extensions. */
8263 case DW_AT_MIPS_fde:
8264 return "DW_AT_MIPS_fde";
8265 case DW_AT_MIPS_loop_begin:
8266 return "DW_AT_MIPS_loop_begin";
8267 case DW_AT_MIPS_tail_loop_begin:
8268 return "DW_AT_MIPS_tail_loop_begin";
8269 case DW_AT_MIPS_epilog_begin:
8270 return "DW_AT_MIPS_epilog_begin";
8271 case DW_AT_MIPS_loop_unroll_factor:
8272 return "DW_AT_MIPS_loop_unroll_factor";
8273 case DW_AT_MIPS_software_pipeline_depth:
8274 return "DW_AT_MIPS_software_pipeline_depth";
8275 case DW_AT_MIPS_linkage_name:
8276 return "DW_AT_MIPS_linkage_name";
8277 case DW_AT_MIPS_stride:
8278 return "DW_AT_MIPS_stride";
8279 case DW_AT_MIPS_abstract_name:
8280 return "DW_AT_MIPS_abstract_name";
8281 case DW_AT_MIPS_clone_origin:
8282 return "DW_AT_MIPS_clone_origin";
8283 case DW_AT_MIPS_has_inlines:
8284 return "DW_AT_MIPS_has_inlines";
8286 /* HP extensions. */
8287 case DW_AT_HP_block_index:
8288 return "DW_AT_HP_block_index";
8289 case DW_AT_HP_unmodifiable:
8290 return "DW_AT_HP_unmodifiable";
8291 case DW_AT_HP_actuals_stmt_list:
8292 return "DW_AT_HP_actuals_stmt_list";
8293 case DW_AT_HP_proc_per_section:
8294 return "DW_AT_HP_proc_per_section";
8295 case DW_AT_HP_raw_data_ptr:
8296 return "DW_AT_HP_raw_data_ptr";
8297 case DW_AT_HP_pass_by_reference:
8298 return "DW_AT_HP_pass_by_reference";
8299 case DW_AT_HP_opt_level:
8300 return "DW_AT_HP_opt_level";
8301 case DW_AT_HP_prof_version_id:
8302 return "DW_AT_HP_prof_version_id";
8303 case DW_AT_HP_opt_flags:
8304 return "DW_AT_HP_opt_flags";
8305 case DW_AT_HP_cold_region_low_pc:
8306 return "DW_AT_HP_cold_region_low_pc";
8307 case DW_AT_HP_cold_region_high_pc:
8308 return "DW_AT_HP_cold_region_high_pc";
8309 case DW_AT_HP_all_variables_modifiable:
8310 return "DW_AT_HP_all_variables_modifiable";
8311 case DW_AT_HP_linkage_name:
8312 return "DW_AT_HP_linkage_name";
8313 case DW_AT_HP_prof_flags:
8314 return "DW_AT_HP_prof_flags";
8315 /* GNU extensions. */
8316 case DW_AT_sf_names:
8317 return "DW_AT_sf_names";
8318 case DW_AT_src_info:
8319 return "DW_AT_src_info";
8320 case DW_AT_mac_info:
8321 return "DW_AT_mac_info";
8322 case DW_AT_src_coords:
8323 return "DW_AT_src_coords";
8324 case DW_AT_body_begin:
8325 return "DW_AT_body_begin";
8326 case DW_AT_body_end:
8327 return "DW_AT_body_end";
8328 case DW_AT_GNU_vector:
8329 return "DW_AT_GNU_vector";
8330 /* VMS extensions. */
8331 case DW_AT_VMS_rtnbeg_pd_address:
8332 return "DW_AT_VMS_rtnbeg_pd_address";
8333 /* UPC extension. */
8334 case DW_AT_upc_threads_scaled:
8335 return "DW_AT_upc_threads_scaled";
8336 /* PGI (STMicroelectronics) extensions. */
8337 case DW_AT_PGI_lbase:
8338 return "DW_AT_PGI_lbase";
8339 case DW_AT_PGI_soffset:
8340 return "DW_AT_PGI_soffset";
8341 case DW_AT_PGI_lstride:
8342 return "DW_AT_PGI_lstride";
8344 return "DW_AT_<unknown>";
8348 /* Convert a DWARF value form code into its string name. */
8351 dwarf_form_name (unsigned form)
8356 return "DW_FORM_addr";
8357 case DW_FORM_block2:
8358 return "DW_FORM_block2";
8359 case DW_FORM_block4:
8360 return "DW_FORM_block4";
8362 return "DW_FORM_data2";
8364 return "DW_FORM_data4";
8366 return "DW_FORM_data8";
8367 case DW_FORM_string:
8368 return "DW_FORM_string";
8370 return "DW_FORM_block";
8371 case DW_FORM_block1:
8372 return "DW_FORM_block1";
8374 return "DW_FORM_data1";
8376 return "DW_FORM_flag";
8378 return "DW_FORM_sdata";
8380 return "DW_FORM_strp";
8382 return "DW_FORM_udata";
8383 case DW_FORM_ref_addr:
8384 return "DW_FORM_ref_addr";
8386 return "DW_FORM_ref1";
8388 return "DW_FORM_ref2";
8390 return "DW_FORM_ref4";
8392 return "DW_FORM_ref8";
8393 case DW_FORM_ref_udata:
8394 return "DW_FORM_ref_udata";
8395 case DW_FORM_indirect:
8396 return "DW_FORM_indirect";
8398 return "DW_FORM_<unknown>";
8402 /* Convert a DWARF stack opcode into its string name. */
8405 dwarf_stack_op_name (unsigned op)
8410 return "DW_OP_addr";
8412 return "DW_OP_deref";
8414 return "DW_OP_const1u";
8416 return "DW_OP_const1s";
8418 return "DW_OP_const2u";
8420 return "DW_OP_const2s";
8422 return "DW_OP_const4u";
8424 return "DW_OP_const4s";
8426 return "DW_OP_const8u";
8428 return "DW_OP_const8s";
8430 return "DW_OP_constu";
8432 return "DW_OP_consts";
8436 return "DW_OP_drop";
8438 return "DW_OP_over";
8440 return "DW_OP_pick";
8442 return "DW_OP_swap";
8446 return "DW_OP_xderef";
8454 return "DW_OP_minus";
8466 return "DW_OP_plus";
8467 case DW_OP_plus_uconst:
8468 return "DW_OP_plus_uconst";
8474 return "DW_OP_shra";
8492 return "DW_OP_skip";
8494 return "DW_OP_lit0";
8496 return "DW_OP_lit1";
8498 return "DW_OP_lit2";
8500 return "DW_OP_lit3";
8502 return "DW_OP_lit4";
8504 return "DW_OP_lit5";
8506 return "DW_OP_lit6";
8508 return "DW_OP_lit7";
8510 return "DW_OP_lit8";
8512 return "DW_OP_lit9";
8514 return "DW_OP_lit10";
8516 return "DW_OP_lit11";
8518 return "DW_OP_lit12";
8520 return "DW_OP_lit13";
8522 return "DW_OP_lit14";
8524 return "DW_OP_lit15";
8526 return "DW_OP_lit16";
8528 return "DW_OP_lit17";
8530 return "DW_OP_lit18";
8532 return "DW_OP_lit19";
8534 return "DW_OP_lit20";
8536 return "DW_OP_lit21";
8538 return "DW_OP_lit22";
8540 return "DW_OP_lit23";
8542 return "DW_OP_lit24";
8544 return "DW_OP_lit25";
8546 return "DW_OP_lit26";
8548 return "DW_OP_lit27";
8550 return "DW_OP_lit28";
8552 return "DW_OP_lit29";
8554 return "DW_OP_lit30";
8556 return "DW_OP_lit31";
8558 return "DW_OP_reg0";
8560 return "DW_OP_reg1";
8562 return "DW_OP_reg2";
8564 return "DW_OP_reg3";
8566 return "DW_OP_reg4";
8568 return "DW_OP_reg5";
8570 return "DW_OP_reg6";
8572 return "DW_OP_reg7";
8574 return "DW_OP_reg8";
8576 return "DW_OP_reg9";
8578 return "DW_OP_reg10";
8580 return "DW_OP_reg11";
8582 return "DW_OP_reg12";
8584 return "DW_OP_reg13";
8586 return "DW_OP_reg14";
8588 return "DW_OP_reg15";
8590 return "DW_OP_reg16";
8592 return "DW_OP_reg17";
8594 return "DW_OP_reg18";
8596 return "DW_OP_reg19";
8598 return "DW_OP_reg20";
8600 return "DW_OP_reg21";
8602 return "DW_OP_reg22";
8604 return "DW_OP_reg23";
8606 return "DW_OP_reg24";
8608 return "DW_OP_reg25";
8610 return "DW_OP_reg26";
8612 return "DW_OP_reg27";
8614 return "DW_OP_reg28";
8616 return "DW_OP_reg29";
8618 return "DW_OP_reg30";
8620 return "DW_OP_reg31";
8622 return "DW_OP_breg0";
8624 return "DW_OP_breg1";
8626 return "DW_OP_breg2";
8628 return "DW_OP_breg3";
8630 return "DW_OP_breg4";
8632 return "DW_OP_breg5";
8634 return "DW_OP_breg6";
8636 return "DW_OP_breg7";
8638 return "DW_OP_breg8";
8640 return "DW_OP_breg9";
8642 return "DW_OP_breg10";
8644 return "DW_OP_breg11";
8646 return "DW_OP_breg12";
8648 return "DW_OP_breg13";
8650 return "DW_OP_breg14";
8652 return "DW_OP_breg15";
8654 return "DW_OP_breg16";
8656 return "DW_OP_breg17";
8658 return "DW_OP_breg18";
8660 return "DW_OP_breg19";
8662 return "DW_OP_breg20";
8664 return "DW_OP_breg21";
8666 return "DW_OP_breg22";
8668 return "DW_OP_breg23";
8670 return "DW_OP_breg24";
8672 return "DW_OP_breg25";
8674 return "DW_OP_breg26";
8676 return "DW_OP_breg27";
8678 return "DW_OP_breg28";
8680 return "DW_OP_breg29";
8682 return "DW_OP_breg30";
8684 return "DW_OP_breg31";
8686 return "DW_OP_regx";
8688 return "DW_OP_fbreg";
8690 return "DW_OP_bregx";
8692 return "DW_OP_piece";
8693 case DW_OP_deref_size:
8694 return "DW_OP_deref_size";
8695 case DW_OP_xderef_size:
8696 return "DW_OP_xderef_size";
8699 /* DWARF 3 extensions. */
8700 case DW_OP_push_object_address:
8701 return "DW_OP_push_object_address";
8703 return "DW_OP_call2";
8705 return "DW_OP_call4";
8706 case DW_OP_call_ref:
8707 return "DW_OP_call_ref";
8708 /* GNU extensions. */
8709 case DW_OP_form_tls_address:
8710 return "DW_OP_form_tls_address";
8711 case DW_OP_call_frame_cfa:
8712 return "DW_OP_call_frame_cfa";
8713 case DW_OP_bit_piece:
8714 return "DW_OP_bit_piece";
8715 case DW_OP_GNU_push_tls_address:
8716 return "DW_OP_GNU_push_tls_address";
8717 case DW_OP_GNU_uninit:
8718 return "DW_OP_GNU_uninit";
8719 /* HP extensions. */
8720 case DW_OP_HP_is_value:
8721 return "DW_OP_HP_is_value";
8722 case DW_OP_HP_fltconst4:
8723 return "DW_OP_HP_fltconst4";
8724 case DW_OP_HP_fltconst8:
8725 return "DW_OP_HP_fltconst8";
8726 case DW_OP_HP_mod_range:
8727 return "DW_OP_HP_mod_range";
8728 case DW_OP_HP_unmod_range:
8729 return "DW_OP_HP_unmod_range";
8731 return "DW_OP_HP_tls";
8733 return "OP_<unknown>";
8738 dwarf_bool_name (unsigned mybool)
8746 /* Convert a DWARF type code into its string name. */
8749 dwarf_type_encoding_name (unsigned enc)
8754 return "DW_ATE_void";
8755 case DW_ATE_address:
8756 return "DW_ATE_address";
8757 case DW_ATE_boolean:
8758 return "DW_ATE_boolean";
8759 case DW_ATE_complex_float:
8760 return "DW_ATE_complex_float";
8762 return "DW_ATE_float";
8764 return "DW_ATE_signed";
8765 case DW_ATE_signed_char:
8766 return "DW_ATE_signed_char";
8767 case DW_ATE_unsigned:
8768 return "DW_ATE_unsigned";
8769 case DW_ATE_unsigned_char:
8770 return "DW_ATE_unsigned_char";
8772 case DW_ATE_imaginary_float:
8773 return "DW_ATE_imaginary_float";
8774 case DW_ATE_packed_decimal:
8775 return "DW_ATE_packed_decimal";
8776 case DW_ATE_numeric_string:
8777 return "DW_ATE_numeric_string";
8779 return "DW_ATE_edited";
8780 case DW_ATE_signed_fixed:
8781 return "DW_ATE_signed_fixed";
8782 case DW_ATE_unsigned_fixed:
8783 return "DW_ATE_unsigned_fixed";
8784 case DW_ATE_decimal_float:
8785 return "DW_ATE_decimal_float";
8786 /* HP extensions. */
8787 case DW_ATE_HP_float80:
8788 return "DW_ATE_HP_float80";
8789 case DW_ATE_HP_complex_float80:
8790 return "DW_ATE_HP_complex_float80";
8791 case DW_ATE_HP_float128:
8792 return "DW_ATE_HP_float128";
8793 case DW_ATE_HP_complex_float128:
8794 return "DW_ATE_HP_complex_float128";
8795 case DW_ATE_HP_floathpintel:
8796 return "DW_ATE_HP_floathpintel";
8797 case DW_ATE_HP_imaginary_float80:
8798 return "DW_ATE_HP_imaginary_float80";
8799 case DW_ATE_HP_imaginary_float128:
8800 return "DW_ATE_HP_imaginary_float128";
8802 return "DW_ATE_<unknown>";
8806 /* Convert a DWARF call frame info operation to its string name. */
8810 dwarf_cfi_name (unsigned cfi_opc)
8814 case DW_CFA_advance_loc:
8815 return "DW_CFA_advance_loc";
8817 return "DW_CFA_offset";
8818 case DW_CFA_restore:
8819 return "DW_CFA_restore";
8821 return "DW_CFA_nop";
8822 case DW_CFA_set_loc:
8823 return "DW_CFA_set_loc";
8824 case DW_CFA_advance_loc1:
8825 return "DW_CFA_advance_loc1";
8826 case DW_CFA_advance_loc2:
8827 return "DW_CFA_advance_loc2";
8828 case DW_CFA_advance_loc4:
8829 return "DW_CFA_advance_loc4";
8830 case DW_CFA_offset_extended:
8831 return "DW_CFA_offset_extended";
8832 case DW_CFA_restore_extended:
8833 return "DW_CFA_restore_extended";
8834 case DW_CFA_undefined:
8835 return "DW_CFA_undefined";
8836 case DW_CFA_same_value:
8837 return "DW_CFA_same_value";
8838 case DW_CFA_register:
8839 return "DW_CFA_register";
8840 case DW_CFA_remember_state:
8841 return "DW_CFA_remember_state";
8842 case DW_CFA_restore_state:
8843 return "DW_CFA_restore_state";
8844 case DW_CFA_def_cfa:
8845 return "DW_CFA_def_cfa";
8846 case DW_CFA_def_cfa_register:
8847 return "DW_CFA_def_cfa_register";
8848 case DW_CFA_def_cfa_offset:
8849 return "DW_CFA_def_cfa_offset";
8851 case DW_CFA_def_cfa_expression:
8852 return "DW_CFA_def_cfa_expression";
8853 case DW_CFA_expression:
8854 return "DW_CFA_expression";
8855 case DW_CFA_offset_extended_sf:
8856 return "DW_CFA_offset_extended_sf";
8857 case DW_CFA_def_cfa_sf:
8858 return "DW_CFA_def_cfa_sf";
8859 case DW_CFA_def_cfa_offset_sf:
8860 return "DW_CFA_def_cfa_offset_sf";
8861 case DW_CFA_val_offset:
8862 return "DW_CFA_val_offset";
8863 case DW_CFA_val_offset_sf:
8864 return "DW_CFA_val_offset_sf";
8865 case DW_CFA_val_expression:
8866 return "DW_CFA_val_expression";
8867 /* SGI/MIPS specific. */
8868 case DW_CFA_MIPS_advance_loc8:
8869 return "DW_CFA_MIPS_advance_loc8";
8870 /* GNU extensions. */
8871 case DW_CFA_GNU_window_save:
8872 return "DW_CFA_GNU_window_save";
8873 case DW_CFA_GNU_args_size:
8874 return "DW_CFA_GNU_args_size";
8875 case DW_CFA_GNU_negative_offset_extended:
8876 return "DW_CFA_GNU_negative_offset_extended";
8878 return "DW_CFA_<unknown>";
8884 dump_die (struct die_info *die)
8888 fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
8889 dwarf_tag_name (die->tag), die->abbrev, die->offset);
8890 fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
8891 dwarf_bool_name (die->child != NULL));
8893 fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
8894 for (i = 0; i < die->num_attrs; ++i)
8896 fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
8897 dwarf_attr_name (die->attrs[i].name),
8898 dwarf_form_name (die->attrs[i].form));
8899 switch (die->attrs[i].form)
8901 case DW_FORM_ref_addr:
8903 fprintf_unfiltered (gdb_stderr, "address: ");
8904 deprecated_print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
8906 case DW_FORM_block2:
8907 case DW_FORM_block4:
8909 case DW_FORM_block1:
8910 fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
8915 fprintf_unfiltered (gdb_stderr, "constant ref: %ld (adjusted)",
8916 (long) (DW_ADDR (&die->attrs[i])));
8924 fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
8926 case DW_FORM_string:
8928 fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
8929 DW_STRING (&die->attrs[i])
8930 ? DW_STRING (&die->attrs[i]) : "");
8933 if (DW_UNSND (&die->attrs[i]))
8934 fprintf_unfiltered (gdb_stderr, "flag: TRUE");
8936 fprintf_unfiltered (gdb_stderr, "flag: FALSE");
8938 case DW_FORM_indirect:
8939 /* the reader will have reduced the indirect form to
8940 the "base form" so this form should not occur */
8941 fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
8944 fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
8945 die->attrs[i].form);
8947 fprintf_unfiltered (gdb_stderr, "\n");
8952 dump_die_list (struct die_info *die)
8957 if (die->child != NULL)
8958 dump_die_list (die->child);
8959 if (die->sibling != NULL)
8960 dump_die_list (die->sibling);
8965 store_in_ref_table (unsigned int offset, struct die_info *die,
8966 struct dwarf2_cu *cu)
8969 struct die_info *old;
8971 h = (offset % REF_HASH_SIZE);
8972 old = cu->die_ref_table[h];
8973 die->next_ref = old;
8974 cu->die_ref_table[h] = die;
8978 dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu)
8980 unsigned int result = 0;
8984 case DW_FORM_ref_addr:
8989 case DW_FORM_ref_udata:
8990 result = DW_ADDR (attr);
8993 complaint (&symfile_complaints,
8994 _("unsupported die ref attribute form: '%s'"),
8995 dwarf_form_name (attr->form));
9000 /* Return the constant value held by the given attribute. Return -1
9001 if the value held by the attribute is not constant. */
9004 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
9006 if (attr->form == DW_FORM_sdata)
9007 return DW_SND (attr);
9008 else if (attr->form == DW_FORM_udata
9009 || attr->form == DW_FORM_data1
9010 || attr->form == DW_FORM_data2
9011 || attr->form == DW_FORM_data4
9012 || attr->form == DW_FORM_data8)
9013 return DW_UNSND (attr);
9016 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
9017 dwarf_form_name (attr->form));
9018 return default_value;
9022 static struct die_info *
9023 follow_die_ref (struct die_info *src_die, struct attribute *attr,
9024 struct dwarf2_cu *cu)
9026 struct die_info *die;
9027 unsigned int offset;
9029 struct die_info temp_die;
9030 struct dwarf2_cu *target_cu;
9032 offset = dwarf2_get_ref_die_offset (attr, cu);
9034 if (DW_ADDR (attr) < cu->header.offset
9035 || DW_ADDR (attr) >= cu->header.offset + cu->header.length)
9037 struct dwarf2_per_cu_data *per_cu;
9038 per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (attr),
9040 target_cu = per_cu->cu;
9045 h = (offset % REF_HASH_SIZE);
9046 die = target_cu->die_ref_table[h];
9049 if (die->offset == offset)
9051 die = die->next_ref;
9054 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9055 "at 0x%lx [in module %s]"),
9056 (long) src_die->offset, (long) offset, cu->objfile->name);
9061 /* Decode simple location descriptions.
9062 Given a pointer to a dwarf block that defines a location, compute
9063 the location and return the value.
9065 NOTE drow/2003-11-18: This function is called in two situations
9066 now: for the address of static or global variables (partial symbols
9067 only) and for offsets into structures which are expected to be
9068 (more or less) constant. The partial symbol case should go away,
9069 and only the constant case should remain. That will let this
9070 function complain more accurately. A few special modes are allowed
9071 without complaint for global variables (for instance, global
9072 register values and thread-local values).
9074 A location description containing no operations indicates that the
9075 object is optimized out. The return value is 0 for that case.
9076 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9077 callers will only want a very basic result and this can become a
9080 Note that stack[0] is unused except as a default error return.
9081 Note that stack overflow is not yet handled. */
9084 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
9086 struct objfile *objfile = cu->objfile;
9087 struct comp_unit_head *cu_header = &cu->header;
9089 int size = blk->size;
9090 gdb_byte *data = blk->data;
9091 CORE_ADDR stack[64];
9093 unsigned int bytes_read, unsnd;
9137 stack[++stacki] = op - DW_OP_lit0;
9172 stack[++stacki] = op - DW_OP_reg0;
9174 dwarf2_complex_location_expr_complaint ();
9178 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
9180 stack[++stacki] = unsnd;
9182 dwarf2_complex_location_expr_complaint ();
9186 stack[++stacki] = read_address (objfile->obfd, &data[i],
9192 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
9197 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
9202 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
9207 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
9212 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
9217 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
9222 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
9228 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
9233 stack[stacki + 1] = stack[stacki];
9238 stack[stacki - 1] += stack[stacki];
9242 case DW_OP_plus_uconst:
9243 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
9248 stack[stacki - 1] -= stack[stacki];
9253 /* If we're not the last op, then we definitely can't encode
9254 this using GDB's address_class enum. This is valid for partial
9255 global symbols, although the variable's address will be bogus
9258 dwarf2_complex_location_expr_complaint ();
9261 case DW_OP_GNU_push_tls_address:
9262 /* The top of the stack has the offset from the beginning
9263 of the thread control block at which the variable is located. */
9264 /* Nothing should follow this operator, so the top of stack would
9266 /* This is valid for partial global symbols, but the variable's
9267 address will be bogus in the psymtab. */
9269 dwarf2_complex_location_expr_complaint ();
9272 case DW_OP_GNU_uninit:
9276 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
9277 dwarf_stack_op_name (op));
9278 return (stack[stacki]);
9281 return (stack[stacki]);
9284 /* memory allocation interface */
9286 static struct dwarf_block *
9287 dwarf_alloc_block (struct dwarf2_cu *cu)
9289 struct dwarf_block *blk;
9291 blk = (struct dwarf_block *)
9292 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
9296 static struct abbrev_info *
9297 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
9299 struct abbrev_info *abbrev;
9301 abbrev = (struct abbrev_info *)
9302 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
9303 memset (abbrev, 0, sizeof (struct abbrev_info));
9307 static struct die_info *
9308 dwarf_alloc_die (void)
9310 struct die_info *die;
9312 die = (struct die_info *) xmalloc (sizeof (struct die_info));
9313 memset (die, 0, sizeof (struct die_info));
9318 /* Macro support. */
9321 /* Return the full name of file number I in *LH's file name table.
9322 Use COMP_DIR as the name of the current directory of the
9323 compilation. The result is allocated using xmalloc; the caller is
9324 responsible for freeing it. */
9326 file_full_name (int file, struct line_header *lh, const char *comp_dir)
9328 /* Is the file number a valid index into the line header's file name
9329 table? Remember that file numbers start with one, not zero. */
9330 if (1 <= file && file <= lh->num_file_names)
9332 struct file_entry *fe = &lh->file_names[file - 1];
9334 if (IS_ABSOLUTE_PATH (fe->name))
9335 return xstrdup (fe->name);
9343 dir = lh->include_dirs[fe->dir_index - 1];
9349 dir_len = strlen (dir);
9350 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
9351 strcpy (full_name, dir);
9352 full_name[dir_len] = '/';
9353 strcpy (full_name + dir_len + 1, fe->name);
9357 return xstrdup (fe->name);
9362 /* The compiler produced a bogus file number. We can at least
9363 record the macro definitions made in the file, even if we
9364 won't be able to find the file by name. */
9366 sprintf (fake_name, "<bad macro file number %d>", file);
9368 complaint (&symfile_complaints,
9369 _("bad file number in macro information (%d)"),
9372 return xstrdup (fake_name);
9377 static struct macro_source_file *
9378 macro_start_file (int file, int line,
9379 struct macro_source_file *current_file,
9380 const char *comp_dir,
9381 struct line_header *lh, struct objfile *objfile)
9383 /* The full name of this source file. */
9384 char *full_name = file_full_name (file, lh, comp_dir);
9386 /* We don't create a macro table for this compilation unit
9387 at all until we actually get a filename. */
9388 if (! pending_macros)
9389 pending_macros = new_macro_table (&objfile->objfile_obstack,
9390 objfile->macro_cache);
9393 /* If we have no current file, then this must be the start_file
9394 directive for the compilation unit's main source file. */
9395 current_file = macro_set_main (pending_macros, full_name);
9397 current_file = macro_include (current_file, line, full_name);
9401 return current_file;
9405 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9406 followed by a null byte. */
9408 copy_string (const char *buf, int len)
9410 char *s = xmalloc (len + 1);
9411 memcpy (s, buf, len);
9419 consume_improper_spaces (const char *p, const char *body)
9423 complaint (&symfile_complaints,
9424 _("macro definition contains spaces in formal argument list:\n`%s'"),
9436 parse_macro_definition (struct macro_source_file *file, int line,
9441 /* The body string takes one of two forms. For object-like macro
9442 definitions, it should be:
9444 <macro name> " " <definition>
9446 For function-like macro definitions, it should be:
9448 <macro name> "() " <definition>
9450 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9452 Spaces may appear only where explicitly indicated, and in the
9455 The Dwarf 2 spec says that an object-like macro's name is always
9456 followed by a space, but versions of GCC around March 2002 omit
9457 the space when the macro's definition is the empty string.
9459 The Dwarf 2 spec says that there should be no spaces between the
9460 formal arguments in a function-like macro's formal argument list,
9461 but versions of GCC around March 2002 include spaces after the
9465 /* Find the extent of the macro name. The macro name is terminated
9466 by either a space or null character (for an object-like macro) or
9467 an opening paren (for a function-like macro). */
9468 for (p = body; *p; p++)
9469 if (*p == ' ' || *p == '(')
9472 if (*p == ' ' || *p == '\0')
9474 /* It's an object-like macro. */
9475 int name_len = p - body;
9476 char *name = copy_string (body, name_len);
9477 const char *replacement;
9480 replacement = body + name_len + 1;
9483 dwarf2_macro_malformed_definition_complaint (body);
9484 replacement = body + name_len;
9487 macro_define_object (file, line, name, replacement);
9493 /* It's a function-like macro. */
9494 char *name = copy_string (body, p - body);
9497 char **argv = xmalloc (argv_size * sizeof (*argv));
9501 p = consume_improper_spaces (p, body);
9503 /* Parse the formal argument list. */
9504 while (*p && *p != ')')
9506 /* Find the extent of the current argument name. */
9507 const char *arg_start = p;
9509 while (*p && *p != ',' && *p != ')' && *p != ' ')
9512 if (! *p || p == arg_start)
9513 dwarf2_macro_malformed_definition_complaint (body);
9516 /* Make sure argv has room for the new argument. */
9517 if (argc >= argv_size)
9520 argv = xrealloc (argv, argv_size * sizeof (*argv));
9523 argv[argc++] = copy_string (arg_start, p - arg_start);
9526 p = consume_improper_spaces (p, body);
9528 /* Consume the comma, if present. */
9533 p = consume_improper_spaces (p, body);
9542 /* Perfectly formed definition, no complaints. */
9543 macro_define_function (file, line, name,
9544 argc, (const char **) argv,
9546 else if (*p == '\0')
9548 /* Complain, but do define it. */
9549 dwarf2_macro_malformed_definition_complaint (body);
9550 macro_define_function (file, line, name,
9551 argc, (const char **) argv,
9555 /* Just complain. */
9556 dwarf2_macro_malformed_definition_complaint (body);
9559 /* Just complain. */
9560 dwarf2_macro_malformed_definition_complaint (body);
9566 for (i = 0; i < argc; i++)
9572 dwarf2_macro_malformed_definition_complaint (body);
9577 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
9578 char *comp_dir, bfd *abfd,
9579 struct dwarf2_cu *cu)
9581 gdb_byte *mac_ptr, *mac_end;
9582 struct macro_source_file *current_file = 0;
9584 if (dwarf2_per_objfile->macinfo_buffer == NULL)
9586 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
9590 mac_ptr = dwarf2_per_objfile->macinfo_buffer + offset;
9591 mac_end = dwarf2_per_objfile->macinfo_buffer
9592 + dwarf2_per_objfile->macinfo_size;
9596 enum dwarf_macinfo_record_type macinfo_type;
9598 /* Do we at least have room for a macinfo type byte? */
9599 if (mac_ptr >= mac_end)
9601 dwarf2_macros_too_long_complaint ();
9605 macinfo_type = read_1_byte (abfd, mac_ptr);
9608 switch (macinfo_type)
9610 /* A zero macinfo type indicates the end of the macro
9615 case DW_MACINFO_define:
9616 case DW_MACINFO_undef:
9618 unsigned int bytes_read;
9622 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9623 mac_ptr += bytes_read;
9624 body = read_string (abfd, mac_ptr, &bytes_read);
9625 mac_ptr += bytes_read;
9628 complaint (&symfile_complaints,
9629 _("debug info gives macro %s outside of any file: %s"),
9631 DW_MACINFO_define ? "definition" : macinfo_type ==
9632 DW_MACINFO_undef ? "undefinition" :
9633 "something-or-other", body);
9636 if (macinfo_type == DW_MACINFO_define)
9637 parse_macro_definition (current_file, line, body);
9638 else if (macinfo_type == DW_MACINFO_undef)
9639 macro_undef (current_file, line, body);
9644 case DW_MACINFO_start_file:
9646 unsigned int bytes_read;
9649 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9650 mac_ptr += bytes_read;
9651 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9652 mac_ptr += bytes_read;
9654 current_file = macro_start_file (file, line,
9655 current_file, comp_dir,
9660 case DW_MACINFO_end_file:
9662 complaint (&symfile_complaints,
9663 _("macro debug info has an unmatched `close_file' directive"));
9666 current_file = current_file->included_by;
9669 enum dwarf_macinfo_record_type next_type;
9671 /* GCC circa March 2002 doesn't produce the zero
9672 type byte marking the end of the compilation
9673 unit. Complain if it's not there, but exit no
9676 /* Do we at least have room for a macinfo type byte? */
9677 if (mac_ptr >= mac_end)
9679 dwarf2_macros_too_long_complaint ();
9683 /* We don't increment mac_ptr here, so this is just
9685 next_type = read_1_byte (abfd, mac_ptr);
9687 complaint (&symfile_complaints,
9688 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9695 case DW_MACINFO_vendor_ext:
9697 unsigned int bytes_read;
9701 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9702 mac_ptr += bytes_read;
9703 string = read_string (abfd, mac_ptr, &bytes_read);
9704 mac_ptr += bytes_read;
9706 /* We don't recognize any vendor extensions. */
9713 /* Check if the attribute's form is a DW_FORM_block*
9714 if so return true else false. */
9716 attr_form_is_block (struct attribute *attr)
9718 return (attr == NULL ? 0 :
9719 attr->form == DW_FORM_block1
9720 || attr->form == DW_FORM_block2
9721 || attr->form == DW_FORM_block4
9722 || attr->form == DW_FORM_block);
9726 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
9727 struct dwarf2_cu *cu)
9729 struct objfile *objfile = cu->objfile;
9731 /* Save the master objfile, so that we can report and look up the
9732 correct file containing this variable. */
9733 if (objfile->separate_debug_objfile_backlink)
9734 objfile = objfile->separate_debug_objfile_backlink;
9736 if ((attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
9737 /* ".debug_loc" may not exist at all, or the offset may be outside
9738 the section. If so, fall through to the complaint in the
9740 && DW_UNSND (attr) < dwarf2_per_objfile->loc_size)
9742 struct dwarf2_loclist_baton *baton;
9744 baton = obstack_alloc (&cu->objfile->objfile_obstack,
9745 sizeof (struct dwarf2_loclist_baton));
9746 baton->objfile = objfile;
9748 /* We don't know how long the location list is, but make sure we
9749 don't run off the edge of the section. */
9750 baton->size = dwarf2_per_objfile->loc_size - DW_UNSND (attr);
9751 baton->data = dwarf2_per_objfile->loc_buffer + DW_UNSND (attr);
9752 baton->base_address = cu->header.base_address;
9753 if (cu->header.base_known == 0)
9754 complaint (&symfile_complaints,
9755 _("Location list used without specifying the CU base address."));
9757 SYMBOL_OPS (sym) = &dwarf2_loclist_funcs;
9758 SYMBOL_LOCATION_BATON (sym) = baton;
9762 struct dwarf2_locexpr_baton *baton;
9764 baton = obstack_alloc (&cu->objfile->objfile_obstack,
9765 sizeof (struct dwarf2_locexpr_baton));
9766 baton->objfile = objfile;
9768 if (attr_form_is_block (attr))
9770 /* Note that we're just copying the block's data pointer
9771 here, not the actual data. We're still pointing into the
9772 info_buffer for SYM's objfile; right now we never release
9773 that buffer, but when we do clean up properly this may
9775 baton->size = DW_BLOCK (attr)->size;
9776 baton->data = DW_BLOCK (attr)->data;
9780 dwarf2_invalid_attrib_class_complaint ("location description",
9781 SYMBOL_NATURAL_NAME (sym));
9786 SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs;
9787 SYMBOL_LOCATION_BATON (sym) = baton;
9791 /* Locate the compilation unit from CU's objfile which contains the
9792 DIE at OFFSET. Raises an error on failure. */
9794 static struct dwarf2_per_cu_data *
9795 dwarf2_find_containing_comp_unit (unsigned long offset,
9796 struct objfile *objfile)
9798 struct dwarf2_per_cu_data *this_cu;
9802 high = dwarf2_per_objfile->n_comp_units - 1;
9805 int mid = low + (high - low) / 2;
9806 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
9811 gdb_assert (low == high);
9812 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
9815 error (_("Dwarf Error: could not find partial DIE containing "
9816 "offset 0x%lx [in module %s]"),
9817 (long) offset, bfd_get_filename (objfile->obfd));
9819 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
9820 return dwarf2_per_objfile->all_comp_units[low-1];
9824 this_cu = dwarf2_per_objfile->all_comp_units[low];
9825 if (low == dwarf2_per_objfile->n_comp_units - 1
9826 && offset >= this_cu->offset + this_cu->length)
9827 error (_("invalid dwarf2 offset %ld"), offset);
9828 gdb_assert (offset < this_cu->offset + this_cu->length);
9833 /* Locate the compilation unit from OBJFILE which is located at exactly
9834 OFFSET. Raises an error on failure. */
9836 static struct dwarf2_per_cu_data *
9837 dwarf2_find_comp_unit (unsigned long offset, struct objfile *objfile)
9839 struct dwarf2_per_cu_data *this_cu;
9840 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
9841 if (this_cu->offset != offset)
9842 error (_("no compilation unit with offset %ld."), offset);
9846 /* Release one cached compilation unit, CU. We unlink it from the tree
9847 of compilation units, but we don't remove it from the read_in_chain;
9848 the caller is responsible for that. */
9851 free_one_comp_unit (void *data)
9853 struct dwarf2_cu *cu = data;
9855 if (cu->per_cu != NULL)
9856 cu->per_cu->cu = NULL;
9859 obstack_free (&cu->comp_unit_obstack, NULL);
9861 free_die_list (cu->dies);
9866 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9867 when we're finished with it. We can't free the pointer itself, but be
9868 sure to unlink it from the cache. Also release any associated storage
9869 and perform cache maintenance.
9871 Only used during partial symbol parsing. */
9874 free_stack_comp_unit (void *data)
9876 struct dwarf2_cu *cu = data;
9878 obstack_free (&cu->comp_unit_obstack, NULL);
9879 cu->partial_dies = NULL;
9881 if (cu->per_cu != NULL)
9883 /* This compilation unit is on the stack in our caller, so we
9884 should not xfree it. Just unlink it. */
9885 cu->per_cu->cu = NULL;
9888 /* If we had a per-cu pointer, then we may have other compilation
9889 units loaded, so age them now. */
9890 age_cached_comp_units ();
9894 /* Free all cached compilation units. */
9897 free_cached_comp_units (void *data)
9899 struct dwarf2_per_cu_data *per_cu, **last_chain;
9901 per_cu = dwarf2_per_objfile->read_in_chain;
9902 last_chain = &dwarf2_per_objfile->read_in_chain;
9903 while (per_cu != NULL)
9905 struct dwarf2_per_cu_data *next_cu;
9907 next_cu = per_cu->cu->read_in_chain;
9909 free_one_comp_unit (per_cu->cu);
9910 *last_chain = next_cu;
9916 /* Increase the age counter on each cached compilation unit, and free
9917 any that are too old. */
9920 age_cached_comp_units (void)
9922 struct dwarf2_per_cu_data *per_cu, **last_chain;
9924 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
9925 per_cu = dwarf2_per_objfile->read_in_chain;
9926 while (per_cu != NULL)
9928 per_cu->cu->last_used ++;
9929 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
9930 dwarf2_mark (per_cu->cu);
9931 per_cu = per_cu->cu->read_in_chain;
9934 per_cu = dwarf2_per_objfile->read_in_chain;
9935 last_chain = &dwarf2_per_objfile->read_in_chain;
9936 while (per_cu != NULL)
9938 struct dwarf2_per_cu_data *next_cu;
9940 next_cu = per_cu->cu->read_in_chain;
9942 if (!per_cu->cu->mark)
9944 free_one_comp_unit (per_cu->cu);
9945 *last_chain = next_cu;
9948 last_chain = &per_cu->cu->read_in_chain;
9954 /* Remove a single compilation unit from the cache. */
9957 free_one_cached_comp_unit (void *target_cu)
9959 struct dwarf2_per_cu_data *per_cu, **last_chain;
9961 per_cu = dwarf2_per_objfile->read_in_chain;
9962 last_chain = &dwarf2_per_objfile->read_in_chain;
9963 while (per_cu != NULL)
9965 struct dwarf2_per_cu_data *next_cu;
9967 next_cu = per_cu->cu->read_in_chain;
9969 if (per_cu->cu == target_cu)
9971 free_one_comp_unit (per_cu->cu);
9972 *last_chain = next_cu;
9976 last_chain = &per_cu->cu->read_in_chain;
9982 /* Release all extra memory associated with OBJFILE. */
9985 dwarf2_free_objfile (struct objfile *objfile)
9987 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
9989 if (dwarf2_per_objfile == NULL)
9992 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
9993 free_cached_comp_units (NULL);
9995 /* Everything else should be on the objfile obstack. */
9998 /* A pair of DIE offset and GDB type pointer. We store these
9999 in a hash table separate from the DIEs, and preserve them
10000 when the DIEs are flushed out of cache. */
10002 struct dwarf2_offset_and_type
10004 unsigned int offset;
10008 /* Hash function for a dwarf2_offset_and_type. */
10011 offset_and_type_hash (const void *item)
10013 const struct dwarf2_offset_and_type *ofs = item;
10014 return ofs->offset;
10017 /* Equality function for a dwarf2_offset_and_type. */
10020 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
10022 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
10023 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
10024 return ofs_lhs->offset == ofs_rhs->offset;
10027 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10028 table if necessary. */
10031 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
10033 struct dwarf2_offset_and_type **slot, ofs;
10037 if (cu->per_cu == NULL)
10040 if (cu->per_cu->type_hash == NULL)
10041 cu->per_cu->type_hash
10042 = htab_create_alloc_ex (cu->header.length / 24,
10043 offset_and_type_hash,
10044 offset_and_type_eq,
10046 &cu->objfile->objfile_obstack,
10047 hashtab_obstack_allocate,
10048 dummy_obstack_deallocate);
10050 ofs.offset = die->offset;
10052 slot = (struct dwarf2_offset_and_type **)
10053 htab_find_slot_with_hash (cu->per_cu->type_hash, &ofs, ofs.offset, INSERT);
10054 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
10058 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10059 have a saved type. */
10061 static struct type *
10062 get_die_type (struct die_info *die, htab_t type_hash)
10064 struct dwarf2_offset_and_type *slot, ofs;
10066 ofs.offset = die->offset;
10067 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
10074 /* Restore the types of the DIE tree starting at START_DIE from the hash
10075 table saved in CU. */
10078 reset_die_and_siblings_types (struct die_info *start_die, struct dwarf2_cu *cu)
10080 struct die_info *die;
10082 if (cu->per_cu->type_hash == NULL)
10085 for (die = start_die; die != NULL; die = die->sibling)
10087 die->type = get_die_type (die, cu->per_cu->type_hash);
10088 if (die->child != NULL)
10089 reset_die_and_siblings_types (die->child, cu);
10093 /* Set the mark field in CU and in every other compilation unit in the
10094 cache that we must keep because we are keeping CU. */
10096 /* Add a dependence relationship from CU to REF_PER_CU. */
10099 dwarf2_add_dependence (struct dwarf2_cu *cu,
10100 struct dwarf2_per_cu_data *ref_per_cu)
10104 if (cu->dependencies == NULL)
10106 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
10107 NULL, &cu->comp_unit_obstack,
10108 hashtab_obstack_allocate,
10109 dummy_obstack_deallocate);
10111 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
10113 *slot = ref_per_cu;
10116 /* Set the mark field in CU and in every other compilation unit in the
10117 cache that we must keep because we are keeping CU. */
10120 dwarf2_mark_helper (void **slot, void *data)
10122 struct dwarf2_per_cu_data *per_cu;
10124 per_cu = (struct dwarf2_per_cu_data *) *slot;
10125 if (per_cu->cu->mark)
10127 per_cu->cu->mark = 1;
10129 if (per_cu->cu->dependencies != NULL)
10130 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
10136 dwarf2_mark (struct dwarf2_cu *cu)
10141 if (cu->dependencies != NULL)
10142 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
10146 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
10150 per_cu->cu->mark = 0;
10151 per_cu = per_cu->cu->read_in_chain;
10155 /* Trivial hash function for partial_die_info: the hash value of a DIE
10156 is its offset in .debug_info for this objfile. */
10159 partial_die_hash (const void *item)
10161 const struct partial_die_info *part_die = item;
10162 return part_die->offset;
10165 /* Trivial comparison function for partial_die_info structures: two DIEs
10166 are equal if they have the same offset. */
10169 partial_die_eq (const void *item_lhs, const void *item_rhs)
10171 const struct partial_die_info *part_die_lhs = item_lhs;
10172 const struct partial_die_info *part_die_rhs = item_rhs;
10173 return part_die_lhs->offset == part_die_rhs->offset;
10176 static struct cmd_list_element *set_dwarf2_cmdlist;
10177 static struct cmd_list_element *show_dwarf2_cmdlist;
10180 set_dwarf2_cmd (char *args, int from_tty)
10182 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
10186 show_dwarf2_cmd (char *args, int from_tty)
10188 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
10191 void _initialize_dwarf2_read (void);
10194 _initialize_dwarf2_read (void)
10196 dwarf2_objfile_data_key = register_objfile_data ();
10198 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
10199 Set DWARF 2 specific variables.\n\
10200 Configure DWARF 2 variables such as the cache size"),
10201 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
10202 0/*allow-unknown*/, &maintenance_set_cmdlist);
10204 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
10205 Show DWARF 2 specific variables\n\
10206 Show DWARF 2 variables such as the cache size"),
10207 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
10208 0/*allow-unknown*/, &maintenance_show_cmdlist);
10210 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
10211 &dwarf2_max_cache_age, _("\
10212 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10213 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10214 A higher limit means that cached compilation units will be stored\n\
10215 in memory longer, and more total memory will be used. Zero disables\n\
10216 caching, which can slow down startup."),
10218 show_dwarf2_max_cache_age,
10219 &set_dwarf2_cmdlist,
10220 &show_dwarf2_cmdlist);