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 int attr_form_is_section_offset (struct attribute *);
1032 static int attr_form_is_constant (struct attribute *);
1034 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1036 struct dwarf2_cu *cu);
1038 static gdb_byte *skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev,
1039 struct dwarf2_cu *cu);
1041 static void free_stack_comp_unit (void *);
1043 static hashval_t partial_die_hash (const void *item);
1045 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1047 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1048 (unsigned long offset, struct objfile *objfile);
1050 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1051 (unsigned long offset, struct objfile *objfile);
1053 static void free_one_comp_unit (void *);
1055 static void free_cached_comp_units (void *);
1057 static void age_cached_comp_units (void);
1059 static void free_one_cached_comp_unit (void *);
1061 static void set_die_type (struct die_info *, struct type *,
1062 struct dwarf2_cu *);
1064 static void reset_die_and_siblings_types (struct die_info *,
1065 struct dwarf2_cu *);
1067 static void create_all_comp_units (struct objfile *);
1069 static struct dwarf2_cu *load_full_comp_unit (struct dwarf2_per_cu_data *,
1072 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1074 static void dwarf2_add_dependence (struct dwarf2_cu *,
1075 struct dwarf2_per_cu_data *);
1077 static void dwarf2_mark (struct dwarf2_cu *);
1079 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1081 static void read_set_type (struct die_info *, struct dwarf2_cu *);
1084 /* Try to locate the sections we need for DWARF 2 debugging
1085 information and return true if we have enough to do something. */
1088 dwarf2_has_info (struct objfile *objfile)
1090 struct dwarf2_per_objfile *data;
1092 /* Initialize per-objfile state. */
1093 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1094 memset (data, 0, sizeof (*data));
1095 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1096 dwarf2_per_objfile = data;
1098 dwarf_info_section = 0;
1099 dwarf_abbrev_section = 0;
1100 dwarf_line_section = 0;
1101 dwarf_str_section = 0;
1102 dwarf_macinfo_section = 0;
1103 dwarf_frame_section = 0;
1104 dwarf_eh_frame_section = 0;
1105 dwarf_ranges_section = 0;
1106 dwarf_loc_section = 0;
1108 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1109 return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
1112 /* This function is mapped across the sections and remembers the
1113 offset and size of each of the debugging sections we are interested
1117 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1119 if (strcmp (sectp->name, INFO_SECTION) == 0)
1121 dwarf2_per_objfile->info_size = bfd_get_section_size (sectp);
1122 dwarf_info_section = sectp;
1124 else if (strcmp (sectp->name, ABBREV_SECTION) == 0)
1126 dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp);
1127 dwarf_abbrev_section = sectp;
1129 else if (strcmp (sectp->name, LINE_SECTION) == 0)
1131 dwarf2_per_objfile->line_size = bfd_get_section_size (sectp);
1132 dwarf_line_section = sectp;
1134 else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0)
1136 dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp);
1137 dwarf_pubnames_section = sectp;
1139 else if (strcmp (sectp->name, ARANGES_SECTION) == 0)
1141 dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp);
1142 dwarf_aranges_section = sectp;
1144 else if (strcmp (sectp->name, LOC_SECTION) == 0)
1146 dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp);
1147 dwarf_loc_section = sectp;
1149 else if (strcmp (sectp->name, MACINFO_SECTION) == 0)
1151 dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp);
1152 dwarf_macinfo_section = sectp;
1154 else if (strcmp (sectp->name, STR_SECTION) == 0)
1156 dwarf2_per_objfile->str_size = bfd_get_section_size (sectp);
1157 dwarf_str_section = sectp;
1159 else if (strcmp (sectp->name, FRAME_SECTION) == 0)
1161 dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp);
1162 dwarf_frame_section = sectp;
1164 else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0)
1166 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1167 if (aflag & SEC_HAS_CONTENTS)
1169 dwarf2_per_objfile->eh_frame_size = bfd_get_section_size (sectp);
1170 dwarf_eh_frame_section = sectp;
1173 else if (strcmp (sectp->name, RANGES_SECTION) == 0)
1175 dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp);
1176 dwarf_ranges_section = sectp;
1179 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1180 && bfd_section_vma (abfd, sectp) == 0)
1181 dwarf2_per_objfile->has_section_at_zero = 1;
1184 /* Build a partial symbol table. */
1187 dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
1189 /* We definitely need the .debug_info and .debug_abbrev sections */
1191 dwarf2_per_objfile->info_buffer = dwarf2_read_section (objfile, dwarf_info_section);
1192 dwarf2_per_objfile->abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section);
1194 if (dwarf_line_section)
1195 dwarf2_per_objfile->line_buffer = dwarf2_read_section (objfile, dwarf_line_section);
1197 dwarf2_per_objfile->line_buffer = NULL;
1199 if (dwarf_str_section)
1200 dwarf2_per_objfile->str_buffer = dwarf2_read_section (objfile, dwarf_str_section);
1202 dwarf2_per_objfile->str_buffer = NULL;
1204 if (dwarf_macinfo_section)
1205 dwarf2_per_objfile->macinfo_buffer = dwarf2_read_section (objfile,
1206 dwarf_macinfo_section);
1208 dwarf2_per_objfile->macinfo_buffer = NULL;
1210 if (dwarf_ranges_section)
1211 dwarf2_per_objfile->ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section);
1213 dwarf2_per_objfile->ranges_buffer = NULL;
1215 if (dwarf_loc_section)
1216 dwarf2_per_objfile->loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section);
1218 dwarf2_per_objfile->loc_buffer = NULL;
1221 || (objfile->global_psymbols.size == 0
1222 && objfile->static_psymbols.size == 0))
1224 init_psymbol_list (objfile, 1024);
1228 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1230 /* Things are significantly easier if we have .debug_aranges and
1231 .debug_pubnames sections */
1233 dwarf2_build_psymtabs_easy (objfile, mainline);
1237 /* only test this case for now */
1239 /* In this case we have to work a bit harder */
1240 dwarf2_build_psymtabs_hard (objfile, mainline);
1245 /* Build the partial symbol table from the information in the
1246 .debug_pubnames and .debug_aranges sections. */
1249 dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
1251 bfd *abfd = objfile->obfd;
1252 char *aranges_buffer, *pubnames_buffer;
1253 char *aranges_ptr, *pubnames_ptr;
1254 unsigned int entry_length, version, info_offset, info_size;
1256 pubnames_buffer = dwarf2_read_section (objfile,
1257 dwarf_pubnames_section);
1258 pubnames_ptr = pubnames_buffer;
1259 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size)
1261 struct comp_unit_head cu_header;
1262 unsigned int bytes_read;
1264 entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
1266 pubnames_ptr += bytes_read;
1267 version = read_1_byte (abfd, pubnames_ptr);
1269 info_offset = read_4_bytes (abfd, pubnames_ptr);
1271 info_size = read_4_bytes (abfd, pubnames_ptr);
1275 aranges_buffer = dwarf2_read_section (objfile,
1276 dwarf_aranges_section);
1281 /* Read in the comp unit header information from the debug_info at
1285 read_comp_unit_head (struct comp_unit_head *cu_header,
1286 gdb_byte *info_ptr, bfd *abfd)
1289 unsigned int bytes_read;
1290 cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
1292 info_ptr += bytes_read;
1293 cu_header->version = read_2_bytes (abfd, info_ptr);
1295 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1297 info_ptr += bytes_read;
1298 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1300 signed_addr = bfd_get_sign_extend_vma (abfd);
1301 if (signed_addr < 0)
1302 internal_error (__FILE__, __LINE__,
1303 _("read_comp_unit_head: dwarf from non elf file"));
1304 cu_header->signed_addr_p = signed_addr;
1309 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1312 gdb_byte *beg_of_comp_unit = info_ptr;
1314 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1316 if (header->version != 2 && header->version != 3)
1317 error (_("Dwarf Error: wrong version in compilation unit header "
1318 "(is %d, should be %d) [in module %s]"), header->version,
1319 2, bfd_get_filename (abfd));
1321 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev_size)
1322 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1323 "(offset 0x%lx + 6) [in module %s]"),
1324 (long) header->abbrev_offset,
1325 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1326 bfd_get_filename (abfd));
1328 if (beg_of_comp_unit + header->length + header->initial_length_size
1329 > dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
1330 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1331 "(offset 0x%lx + 0) [in module %s]"),
1332 (long) header->length,
1333 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1334 bfd_get_filename (abfd));
1339 /* Allocate a new partial symtab for file named NAME and mark this new
1340 partial symtab as being an include of PST. */
1343 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1344 struct objfile *objfile)
1346 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1348 subpst->section_offsets = pst->section_offsets;
1349 subpst->textlow = 0;
1350 subpst->texthigh = 0;
1352 subpst->dependencies = (struct partial_symtab **)
1353 obstack_alloc (&objfile->objfile_obstack,
1354 sizeof (struct partial_symtab *));
1355 subpst->dependencies[0] = pst;
1356 subpst->number_of_dependencies = 1;
1358 subpst->globals_offset = 0;
1359 subpst->n_global_syms = 0;
1360 subpst->statics_offset = 0;
1361 subpst->n_static_syms = 0;
1362 subpst->symtab = NULL;
1363 subpst->read_symtab = pst->read_symtab;
1366 /* No private part is necessary for include psymtabs. This property
1367 can be used to differentiate between such include psymtabs and
1368 the regular ones. */
1369 subpst->read_symtab_private = NULL;
1372 /* Read the Line Number Program data and extract the list of files
1373 included by the source file represented by PST. Build an include
1374 partial symtab for each of these included files.
1376 This procedure assumes that there *is* a Line Number Program in
1377 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1378 before calling this procedure. */
1381 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1382 struct partial_die_info *pdi,
1383 struct partial_symtab *pst)
1385 struct objfile *objfile = cu->objfile;
1386 bfd *abfd = objfile->obfd;
1387 struct line_header *lh;
1389 lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu);
1391 return; /* No linetable, so no includes. */
1393 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1395 free_line_header (lh);
1399 /* Build the partial symbol table by doing a quick pass through the
1400 .debug_info and .debug_abbrev sections. */
1403 dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
1405 /* Instead of reading this into a big buffer, we should probably use
1406 mmap() on architectures that support it. (FIXME) */
1407 bfd *abfd = objfile->obfd;
1409 gdb_byte *beg_of_comp_unit;
1410 struct partial_die_info comp_unit_die;
1411 struct partial_symtab *pst;
1412 struct cleanup *back_to;
1413 CORE_ADDR lowpc, highpc, baseaddr;
1415 info_ptr = dwarf2_per_objfile->info_buffer;
1417 /* Any cached compilation units will be linked by the per-objfile
1418 read_in_chain. Make sure to free them when we're done. */
1419 back_to = make_cleanup (free_cached_comp_units, NULL);
1421 create_all_comp_units (objfile);
1423 /* Since the objects we're extracting from .debug_info vary in
1424 length, only the individual functions to extract them (like
1425 read_comp_unit_head and load_partial_die) can really know whether
1426 the buffer is large enough to hold another complete object.
1428 At the moment, they don't actually check that. If .debug_info
1429 holds just one extra byte after the last compilation unit's dies,
1430 then read_comp_unit_head will happily read off the end of the
1431 buffer. read_partial_die is similarly casual. Those functions
1434 For this loop condition, simply checking whether there's any data
1435 left at all should be sufficient. */
1436 while (info_ptr < (dwarf2_per_objfile->info_buffer
1437 + dwarf2_per_objfile->info_size))
1439 struct cleanup *back_to_inner;
1440 struct dwarf2_cu cu;
1441 struct abbrev_info *abbrev;
1442 unsigned int bytes_read;
1443 struct dwarf2_per_cu_data *this_cu;
1445 beg_of_comp_unit = info_ptr;
1447 memset (&cu, 0, sizeof (cu));
1449 obstack_init (&cu.comp_unit_obstack);
1451 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1453 cu.objfile = objfile;
1454 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd);
1456 /* Complete the cu_header */
1457 cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1458 cu.header.first_die_ptr = info_ptr;
1459 cu.header.cu_head_ptr = beg_of_comp_unit;
1461 cu.list_in_scope = &file_symbols;
1463 /* Read the abbrevs for this compilation unit into a table */
1464 dwarf2_read_abbrevs (abfd, &cu);
1465 make_cleanup (dwarf2_free_abbrev_table, &cu);
1467 this_cu = dwarf2_find_comp_unit (cu.header.offset, objfile);
1469 /* Read the compilation unit die */
1470 abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu);
1471 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
1472 abfd, info_ptr, &cu);
1474 if (comp_unit_die.tag == DW_TAG_partial_unit)
1476 info_ptr = (beg_of_comp_unit + cu.header.length
1477 + cu.header.initial_length_size);
1478 do_cleanups (back_to_inner);
1482 /* Set the language we're debugging */
1483 set_cu_language (comp_unit_die.language, &cu);
1485 /* Allocate a new partial symbol table structure */
1486 pst = start_psymtab_common (objfile, objfile->section_offsets,
1487 comp_unit_die.name ? comp_unit_die.name : "",
1488 comp_unit_die.lowpc,
1489 objfile->global_psymbols.next,
1490 objfile->static_psymbols.next);
1492 if (comp_unit_die.dirname)
1493 pst->dirname = xstrdup (comp_unit_die.dirname);
1495 pst->read_symtab_private = (char *) this_cu;
1497 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1499 /* Store the function that reads in the rest of the symbol table */
1500 pst->read_symtab = dwarf2_psymtab_to_symtab;
1502 /* If this compilation unit was already read in, free the
1503 cached copy in order to read it in again. This is
1504 necessary because we skipped some symbols when we first
1505 read in the compilation unit (see load_partial_dies).
1506 This problem could be avoided, but the benefit is
1508 if (this_cu->cu != NULL)
1509 free_one_cached_comp_unit (this_cu->cu);
1511 cu.per_cu = this_cu;
1513 /* Note that this is a pointer to our stack frame, being
1514 added to a global data structure. It will be cleaned up
1515 in free_stack_comp_unit when we finish with this
1516 compilation unit. */
1519 this_cu->psymtab = pst;
1521 /* Check if comp unit has_children.
1522 If so, read the rest of the partial symbols from this comp unit.
1523 If not, there's no more debug_info for this comp unit. */
1524 if (comp_unit_die.has_children)
1526 struct partial_die_info *first_die;
1528 lowpc = ((CORE_ADDR) -1);
1529 highpc = ((CORE_ADDR) 0);
1531 first_die = load_partial_dies (abfd, info_ptr, 1, &cu);
1533 scan_partial_symbols (first_die, &lowpc, &highpc, &cu);
1535 /* If we didn't find a lowpc, set it to highpc to avoid
1536 complaints from `maint check'. */
1537 if (lowpc == ((CORE_ADDR) -1))
1540 /* If the compilation unit didn't have an explicit address range,
1541 then use the information extracted from its child dies. */
1542 if (! comp_unit_die.has_pc_info)
1544 comp_unit_die.lowpc = lowpc;
1545 comp_unit_die.highpc = highpc;
1548 pst->textlow = comp_unit_die.lowpc + baseaddr;
1549 pst->texthigh = comp_unit_die.highpc + baseaddr;
1551 pst->n_global_syms = objfile->global_psymbols.next -
1552 (objfile->global_psymbols.list + pst->globals_offset);
1553 pst->n_static_syms = objfile->static_psymbols.next -
1554 (objfile->static_psymbols.list + pst->statics_offset);
1555 sort_pst_symbols (pst);
1557 /* If there is already a psymtab or symtab for a file of this
1558 name, remove it. (If there is a symtab, more drastic things
1559 also happen.) This happens in VxWorks. */
1560 free_named_symtabs (pst->filename);
1562 info_ptr = beg_of_comp_unit + cu.header.length
1563 + cu.header.initial_length_size;
1565 if (comp_unit_die.has_stmt_list)
1567 /* Get the list of files included in the current compilation unit,
1568 and build a psymtab for each of them. */
1569 dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst);
1572 do_cleanups (back_to_inner);
1574 do_cleanups (back_to);
1577 /* Load the DIEs for a secondary CU into memory. */
1580 load_comp_unit (struct dwarf2_per_cu_data *this_cu, struct objfile *objfile)
1582 bfd *abfd = objfile->obfd;
1583 gdb_byte *info_ptr, *beg_of_comp_unit;
1584 struct partial_die_info comp_unit_die;
1585 struct dwarf2_cu *cu;
1586 struct abbrev_info *abbrev;
1587 unsigned int bytes_read;
1588 struct cleanup *back_to;
1590 info_ptr = dwarf2_per_objfile->info_buffer + this_cu->offset;
1591 beg_of_comp_unit = info_ptr;
1593 cu = xmalloc (sizeof (struct dwarf2_cu));
1594 memset (cu, 0, sizeof (struct dwarf2_cu));
1596 obstack_init (&cu->comp_unit_obstack);
1598 cu->objfile = objfile;
1599 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr, abfd);
1601 /* Complete the cu_header. */
1602 cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1603 cu->header.first_die_ptr = info_ptr;
1604 cu->header.cu_head_ptr = beg_of_comp_unit;
1606 /* Read the abbrevs for this compilation unit into a table. */
1607 dwarf2_read_abbrevs (abfd, cu);
1608 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
1610 /* Read the compilation unit die. */
1611 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
1612 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
1613 abfd, info_ptr, cu);
1615 /* Set the language we're debugging. */
1616 set_cu_language (comp_unit_die.language, cu);
1618 /* Link this compilation unit into the compilation unit tree. */
1620 cu->per_cu = this_cu;
1622 /* Check if comp unit has_children.
1623 If so, read the rest of the partial symbols from this comp unit.
1624 If not, there's no more debug_info for this comp unit. */
1625 if (comp_unit_die.has_children)
1626 load_partial_dies (abfd, info_ptr, 0, cu);
1628 do_cleanups (back_to);
1631 /* Create a list of all compilation units in OBJFILE. We do this only
1632 if an inter-comp-unit reference is found; presumably if there is one,
1633 there will be many, and one will occur early in the .debug_info section.
1634 So there's no point in building this list incrementally. */
1637 create_all_comp_units (struct objfile *objfile)
1641 struct dwarf2_per_cu_data **all_comp_units;
1642 gdb_byte *info_ptr = dwarf2_per_objfile->info_buffer;
1646 all_comp_units = xmalloc (n_allocated
1647 * sizeof (struct dwarf2_per_cu_data *));
1649 while (info_ptr < dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
1651 struct comp_unit_head cu_header;
1652 gdb_byte *beg_of_comp_unit;
1653 struct dwarf2_per_cu_data *this_cu;
1654 unsigned long offset;
1655 unsigned int bytes_read;
1657 offset = info_ptr - dwarf2_per_objfile->info_buffer;
1659 /* Read just enough information to find out where the next
1660 compilation unit is. */
1661 cu_header.initial_length_size = 0;
1662 cu_header.length = read_initial_length (objfile->obfd, info_ptr,
1663 &cu_header, &bytes_read);
1665 /* Save the compilation unit for later lookup. */
1666 this_cu = obstack_alloc (&objfile->objfile_obstack,
1667 sizeof (struct dwarf2_per_cu_data));
1668 memset (this_cu, 0, sizeof (*this_cu));
1669 this_cu->offset = offset;
1670 this_cu->length = cu_header.length + cu_header.initial_length_size;
1672 if (n_comp_units == n_allocated)
1675 all_comp_units = xrealloc (all_comp_units,
1677 * sizeof (struct dwarf2_per_cu_data *));
1679 all_comp_units[n_comp_units++] = this_cu;
1681 info_ptr = info_ptr + this_cu->length;
1684 dwarf2_per_objfile->all_comp_units
1685 = obstack_alloc (&objfile->objfile_obstack,
1686 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
1687 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
1688 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
1689 xfree (all_comp_units);
1690 dwarf2_per_objfile->n_comp_units = n_comp_units;
1693 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1694 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1698 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
1699 CORE_ADDR *highpc, struct dwarf2_cu *cu)
1701 struct objfile *objfile = cu->objfile;
1702 bfd *abfd = objfile->obfd;
1703 struct partial_die_info *pdi;
1705 /* Now, march along the PDI's, descending into ones which have
1706 interesting children but skipping the children of the other ones,
1707 until we reach the end of the compilation unit. */
1713 fixup_partial_die (pdi, cu);
1715 /* Anonymous namespaces have no name but have interesting
1716 children, so we need to look at them. Ditto for anonymous
1719 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
1720 || pdi->tag == DW_TAG_enumeration_type)
1724 case DW_TAG_subprogram:
1725 if (pdi->has_pc_info)
1727 if (pdi->lowpc < *lowpc)
1729 *lowpc = pdi->lowpc;
1731 if (pdi->highpc > *highpc)
1733 *highpc = pdi->highpc;
1735 if (!pdi->is_declaration)
1737 add_partial_symbol (pdi, cu);
1741 case DW_TAG_variable:
1742 case DW_TAG_typedef:
1743 case DW_TAG_union_type:
1744 if (!pdi->is_declaration)
1746 add_partial_symbol (pdi, cu);
1749 case DW_TAG_class_type:
1750 case DW_TAG_structure_type:
1751 if (!pdi->is_declaration)
1753 add_partial_symbol (pdi, cu);
1756 case DW_TAG_enumeration_type:
1757 if (!pdi->is_declaration)
1758 add_partial_enumeration (pdi, cu);
1760 case DW_TAG_base_type:
1761 case DW_TAG_subrange_type:
1762 /* File scope base type definitions are added to the partial
1764 add_partial_symbol (pdi, cu);
1766 case DW_TAG_namespace:
1767 add_partial_namespace (pdi, lowpc, highpc, cu);
1774 /* If the die has a sibling, skip to the sibling. */
1776 pdi = pdi->die_sibling;
1780 /* Functions used to compute the fully scoped name of a partial DIE.
1782 Normally, this is simple. For C++, the parent DIE's fully scoped
1783 name is concatenated with "::" and the partial DIE's name. For
1784 Java, the same thing occurs except that "." is used instead of "::".
1785 Enumerators are an exception; they use the scope of their parent
1786 enumeration type, i.e. the name of the enumeration type is not
1787 prepended to the enumerator.
1789 There are two complexities. One is DW_AT_specification; in this
1790 case "parent" means the parent of the target of the specification,
1791 instead of the direct parent of the DIE. The other is compilers
1792 which do not emit DW_TAG_namespace; in this case we try to guess
1793 the fully qualified name of structure types from their members'
1794 linkage names. This must be done using the DIE's children rather
1795 than the children of any DW_AT_specification target. We only need
1796 to do this for structures at the top level, i.e. if the target of
1797 any DW_AT_specification (if any; otherwise the DIE itself) does not
1800 /* Compute the scope prefix associated with PDI's parent, in
1801 compilation unit CU. The result will be allocated on CU's
1802 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1803 field. NULL is returned if no prefix is necessary. */
1805 partial_die_parent_scope (struct partial_die_info *pdi,
1806 struct dwarf2_cu *cu)
1808 char *grandparent_scope;
1809 struct partial_die_info *parent, *real_pdi;
1811 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1812 then this means the parent of the specification DIE. */
1815 while (real_pdi->has_specification)
1816 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
1818 parent = real_pdi->die_parent;
1822 if (parent->scope_set)
1823 return parent->scope;
1825 fixup_partial_die (parent, cu);
1827 grandparent_scope = partial_die_parent_scope (parent, cu);
1829 if (parent->tag == DW_TAG_namespace
1830 || parent->tag == DW_TAG_structure_type
1831 || parent->tag == DW_TAG_class_type
1832 || parent->tag == DW_TAG_union_type)
1834 if (grandparent_scope == NULL)
1835 parent->scope = parent->name;
1837 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
1840 else if (parent->tag == DW_TAG_enumeration_type)
1841 /* Enumerators should not get the name of the enumeration as a prefix. */
1842 parent->scope = grandparent_scope;
1845 /* FIXME drow/2004-04-01: What should we be doing with
1846 function-local names? For partial symbols, we should probably be
1848 complaint (&symfile_complaints,
1849 _("unhandled containing DIE tag %d for DIE at %d"),
1850 parent->tag, pdi->offset);
1851 parent->scope = grandparent_scope;
1854 parent->scope_set = 1;
1855 return parent->scope;
1858 /* Return the fully scoped name associated with PDI, from compilation unit
1859 CU. The result will be allocated with malloc. */
1861 partial_die_full_name (struct partial_die_info *pdi,
1862 struct dwarf2_cu *cu)
1866 parent_scope = partial_die_parent_scope (pdi, cu);
1867 if (parent_scope == NULL)
1870 return typename_concat (NULL, parent_scope, pdi->name, cu);
1874 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
1876 struct objfile *objfile = cu->objfile;
1878 char *actual_name = NULL;
1879 const char *my_prefix;
1880 const struct partial_symbol *psym = NULL;
1882 int built_actual_name = 0;
1884 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1886 if (pdi_needs_namespace (pdi->tag))
1888 actual_name = partial_die_full_name (pdi, cu);
1890 built_actual_name = 1;
1893 if (actual_name == NULL)
1894 actual_name = pdi->name;
1898 case DW_TAG_subprogram:
1899 if (pdi->is_external)
1901 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1902 mst_text, objfile); */
1903 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1904 VAR_DOMAIN, LOC_BLOCK,
1905 &objfile->global_psymbols,
1906 0, pdi->lowpc + baseaddr,
1907 cu->language, objfile);
1911 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1912 mst_file_text, objfile); */
1913 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1914 VAR_DOMAIN, LOC_BLOCK,
1915 &objfile->static_psymbols,
1916 0, pdi->lowpc + baseaddr,
1917 cu->language, objfile);
1920 case DW_TAG_variable:
1921 if (pdi->is_external)
1924 Don't enter into the minimal symbol tables as there is
1925 a minimal symbol table entry from the ELF symbols already.
1926 Enter into partial symbol table if it has a location
1927 descriptor or a type.
1928 If the location descriptor is missing, new_symbol will create
1929 a LOC_UNRESOLVED symbol, the address of the variable will then
1930 be determined from the minimal symbol table whenever the variable
1932 The address for the partial symbol table entry is not
1933 used by GDB, but it comes in handy for debugging partial symbol
1937 addr = decode_locdesc (pdi->locdesc, cu);
1938 if (pdi->locdesc || pdi->has_type)
1939 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1940 VAR_DOMAIN, LOC_STATIC,
1941 &objfile->global_psymbols,
1943 cu->language, objfile);
1947 /* Static Variable. Skip symbols without location descriptors. */
1948 if (pdi->locdesc == NULL)
1950 if (built_actual_name)
1951 xfree (actual_name);
1954 addr = decode_locdesc (pdi->locdesc, cu);
1955 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1956 mst_file_data, objfile); */
1957 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1958 VAR_DOMAIN, LOC_STATIC,
1959 &objfile->static_psymbols,
1961 cu->language, objfile);
1964 case DW_TAG_typedef:
1965 case DW_TAG_base_type:
1966 case DW_TAG_subrange_type:
1967 add_psymbol_to_list (actual_name, strlen (actual_name),
1968 VAR_DOMAIN, LOC_TYPEDEF,
1969 &objfile->static_psymbols,
1970 0, (CORE_ADDR) 0, cu->language, objfile);
1972 case DW_TAG_namespace:
1973 add_psymbol_to_list (actual_name, strlen (actual_name),
1974 VAR_DOMAIN, LOC_TYPEDEF,
1975 &objfile->global_psymbols,
1976 0, (CORE_ADDR) 0, cu->language, objfile);
1978 case DW_TAG_class_type:
1979 case DW_TAG_structure_type:
1980 case DW_TAG_union_type:
1981 case DW_TAG_enumeration_type:
1982 /* Skip external references. The DWARF standard says in the section
1983 about "Structure, Union, and Class Type Entries": "An incomplete
1984 structure, union or class type is represented by a structure,
1985 union or class entry that does not have a byte size attribute
1986 and that has a DW_AT_declaration attribute." */
1987 if (!pdi->has_byte_size && pdi->is_declaration)
1989 if (built_actual_name)
1990 xfree (actual_name);
1994 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
1995 static vs. global. */
1996 add_psymbol_to_list (actual_name, strlen (actual_name),
1997 STRUCT_DOMAIN, LOC_TYPEDEF,
1998 (cu->language == language_cplus
1999 || cu->language == language_java)
2000 ? &objfile->global_psymbols
2001 : &objfile->static_psymbols,
2002 0, (CORE_ADDR) 0, cu->language, objfile);
2004 if (cu->language == language_cplus
2005 || cu->language == language_java
2006 || cu->language == language_ada)
2008 /* For C++ and Java, these implicitly act as typedefs as well. */
2009 add_psymbol_to_list (actual_name, strlen (actual_name),
2010 VAR_DOMAIN, LOC_TYPEDEF,
2011 &objfile->global_psymbols,
2012 0, (CORE_ADDR) 0, cu->language, objfile);
2015 case DW_TAG_enumerator:
2016 add_psymbol_to_list (actual_name, strlen (actual_name),
2017 VAR_DOMAIN, LOC_CONST,
2018 (cu->language == language_cplus
2019 || cu->language == language_java)
2020 ? &objfile->global_psymbols
2021 : &objfile->static_psymbols,
2022 0, (CORE_ADDR) 0, cu->language, objfile);
2028 /* Check to see if we should scan the name for possible namespace
2029 info. Only do this if this is C++, if we don't have namespace
2030 debugging info in the file, if the psym is of an appropriate type
2031 (otherwise we'll have psym == NULL), and if we actually had a
2032 mangled name to begin with. */
2034 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2035 cases which do not set PSYM above? */
2037 if (cu->language == language_cplus
2038 && cu->has_namespace_info == 0
2040 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
2041 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
2044 if (built_actual_name)
2045 xfree (actual_name);
2048 /* Determine whether a die of type TAG living in a C++ class or
2049 namespace needs to have the name of the scope prepended to the
2050 name listed in the die. */
2053 pdi_needs_namespace (enum dwarf_tag tag)
2057 case DW_TAG_namespace:
2058 case DW_TAG_typedef:
2059 case DW_TAG_class_type:
2060 case DW_TAG_structure_type:
2061 case DW_TAG_union_type:
2062 case DW_TAG_enumeration_type:
2063 case DW_TAG_enumerator:
2070 /* Read a partial die corresponding to a namespace; also, add a symbol
2071 corresponding to that namespace to the symbol table. NAMESPACE is
2072 the name of the enclosing namespace. */
2075 add_partial_namespace (struct partial_die_info *pdi,
2076 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2077 struct dwarf2_cu *cu)
2079 struct objfile *objfile = cu->objfile;
2081 /* Add a symbol for the namespace. */
2083 add_partial_symbol (pdi, cu);
2085 /* Now scan partial symbols in that namespace. */
2087 if (pdi->has_children)
2088 scan_partial_symbols (pdi->die_child, lowpc, highpc, cu);
2091 /* See if we can figure out if the class lives in a namespace. We do
2092 this by looking for a member function; its demangled name will
2093 contain namespace info, if there is any. */
2096 guess_structure_name (struct partial_die_info *struct_pdi,
2097 struct dwarf2_cu *cu)
2099 if ((cu->language == language_cplus
2100 || cu->language == language_java)
2101 && cu->has_namespace_info == 0
2102 && struct_pdi->has_children)
2104 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2105 what template types look like, because the demangler
2106 frequently doesn't give the same name as the debug info. We
2107 could fix this by only using the demangled name to get the
2108 prefix (but see comment in read_structure_type). */
2110 struct partial_die_info *child_pdi = struct_pdi->die_child;
2111 struct partial_die_info *real_pdi;
2113 /* If this DIE (this DIE's specification, if any) has a parent, then
2114 we should not do this. We'll prepend the parent's fully qualified
2115 name when we create the partial symbol. */
2117 real_pdi = struct_pdi;
2118 while (real_pdi->has_specification)
2119 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2121 if (real_pdi->die_parent != NULL)
2124 while (child_pdi != NULL)
2126 if (child_pdi->tag == DW_TAG_subprogram)
2128 char *actual_class_name
2129 = language_class_name_from_physname (cu->language_defn,
2131 if (actual_class_name != NULL)
2134 = obsavestring (actual_class_name,
2135 strlen (actual_class_name),
2136 &cu->comp_unit_obstack);
2137 xfree (actual_class_name);
2142 child_pdi = child_pdi->die_sibling;
2147 /* Read a partial die corresponding to an enumeration type. */
2150 add_partial_enumeration (struct partial_die_info *enum_pdi,
2151 struct dwarf2_cu *cu)
2153 struct objfile *objfile = cu->objfile;
2154 bfd *abfd = objfile->obfd;
2155 struct partial_die_info *pdi;
2157 if (enum_pdi->name != NULL)
2158 add_partial_symbol (enum_pdi, cu);
2160 pdi = enum_pdi->die_child;
2163 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2164 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2166 add_partial_symbol (pdi, cu);
2167 pdi = pdi->die_sibling;
2171 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2172 Return the corresponding abbrev, or NULL if the number is zero (indicating
2173 an empty DIE). In either case *BYTES_READ will be set to the length of
2174 the initial number. */
2176 static struct abbrev_info *
2177 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2178 struct dwarf2_cu *cu)
2180 bfd *abfd = cu->objfile->obfd;
2181 unsigned int abbrev_number;
2182 struct abbrev_info *abbrev;
2184 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2186 if (abbrev_number == 0)
2189 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2192 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2193 bfd_get_filename (abfd));
2199 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2200 pointer to the end of a series of DIEs, terminated by an empty
2201 DIE. Any children of the skipped DIEs will also be skipped. */
2204 skip_children (gdb_byte *info_ptr, struct dwarf2_cu *cu)
2206 struct abbrev_info *abbrev;
2207 unsigned int bytes_read;
2211 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2213 return info_ptr + bytes_read;
2215 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
2219 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2220 should point just after the initial uleb128 of a DIE, and the
2221 abbrev corresponding to that skipped uleb128 should be passed in
2222 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2226 skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev,
2227 struct dwarf2_cu *cu)
2229 unsigned int bytes_read;
2230 struct attribute attr;
2231 bfd *abfd = cu->objfile->obfd;
2232 unsigned int form, i;
2234 for (i = 0; i < abbrev->num_attrs; i++)
2236 /* The only abbrev we care about is DW_AT_sibling. */
2237 if (abbrev->attrs[i].name == DW_AT_sibling)
2239 read_attribute (&attr, &abbrev->attrs[i],
2240 abfd, info_ptr, cu);
2241 if (attr.form == DW_FORM_ref_addr)
2242 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2244 return dwarf2_per_objfile->info_buffer
2245 + dwarf2_get_ref_die_offset (&attr, cu);
2248 /* If it isn't DW_AT_sibling, skip this attribute. */
2249 form = abbrev->attrs[i].form;
2254 case DW_FORM_ref_addr:
2255 info_ptr += cu->header.addr_size;
2274 case DW_FORM_string:
2275 read_string (abfd, info_ptr, &bytes_read);
2276 info_ptr += bytes_read;
2279 info_ptr += cu->header.offset_size;
2282 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2283 info_ptr += bytes_read;
2285 case DW_FORM_block1:
2286 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2288 case DW_FORM_block2:
2289 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2291 case DW_FORM_block4:
2292 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2296 case DW_FORM_ref_udata:
2297 info_ptr = skip_leb128 (abfd, info_ptr);
2299 case DW_FORM_indirect:
2300 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2301 info_ptr += bytes_read;
2302 /* We need to continue parsing from here, so just go back to
2304 goto skip_attribute;
2307 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2308 dwarf_form_name (form),
2309 bfd_get_filename (abfd));
2313 if (abbrev->has_children)
2314 return skip_children (info_ptr, cu);
2319 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2320 the next DIE after ORIG_PDI. */
2323 locate_pdi_sibling (struct partial_die_info *orig_pdi, gdb_byte *info_ptr,
2324 bfd *abfd, struct dwarf2_cu *cu)
2326 /* Do we know the sibling already? */
2328 if (orig_pdi->sibling)
2329 return orig_pdi->sibling;
2331 /* Are there any children to deal with? */
2333 if (!orig_pdi->has_children)
2336 /* Skip the children the long way. */
2338 return skip_children (info_ptr, cu);
2341 /* Expand this partial symbol table into a full symbol table. */
2344 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2346 /* FIXME: This is barely more than a stub. */
2351 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2357 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2358 gdb_flush (gdb_stdout);
2361 /* Restore our global data. */
2362 dwarf2_per_objfile = objfile_data (pst->objfile,
2363 dwarf2_objfile_data_key);
2365 psymtab_to_symtab_1 (pst);
2367 /* Finish up the debug error message. */
2369 printf_filtered (_("done.\n"));
2374 /* Add PER_CU to the queue. */
2377 queue_comp_unit (struct dwarf2_per_cu_data *per_cu)
2379 struct dwarf2_queue_item *item;
2382 item = xmalloc (sizeof (*item));
2383 item->per_cu = per_cu;
2386 if (dwarf2_queue == NULL)
2387 dwarf2_queue = item;
2389 dwarf2_queue_tail->next = item;
2391 dwarf2_queue_tail = item;
2394 /* Process the queue. */
2397 process_queue (struct objfile *objfile)
2399 struct dwarf2_queue_item *item, *next_item;
2401 /* Initially, there is just one item on the queue. Load its DIEs,
2402 and the DIEs of any other compilation units it requires,
2405 for (item = dwarf2_queue; item != NULL; item = item->next)
2407 /* Read in this compilation unit. This may add new items to
2408 the end of the queue. */
2409 load_full_comp_unit (item->per_cu, objfile);
2411 item->per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
2412 dwarf2_per_objfile->read_in_chain = item->per_cu;
2414 /* If this compilation unit has already had full symbols created,
2415 reset the TYPE fields in each DIE. */
2416 if (item->per_cu->type_hash)
2417 reset_die_and_siblings_types (item->per_cu->cu->dies,
2421 /* Now everything left on the queue needs to be read in. Process
2422 them, one at a time, removing from the queue as we finish. */
2423 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
2425 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
2426 process_full_comp_unit (item->per_cu);
2428 item->per_cu->queued = 0;
2429 next_item = item->next;
2433 dwarf2_queue_tail = NULL;
2436 /* Free all allocated queue entries. This function only releases anything if
2437 an error was thrown; if the queue was processed then it would have been
2438 freed as we went along. */
2441 dwarf2_release_queue (void *dummy)
2443 struct dwarf2_queue_item *item, *last;
2445 item = dwarf2_queue;
2448 /* Anything still marked queued is likely to be in an
2449 inconsistent state, so discard it. */
2450 if (item->per_cu->queued)
2452 if (item->per_cu->cu != NULL)
2453 free_one_cached_comp_unit (item->per_cu->cu);
2454 item->per_cu->queued = 0;
2462 dwarf2_queue = dwarf2_queue_tail = NULL;
2465 /* Read in full symbols for PST, and anything it depends on. */
2468 psymtab_to_symtab_1 (struct partial_symtab *pst)
2470 struct dwarf2_per_cu_data *per_cu;
2471 struct cleanup *back_to;
2474 for (i = 0; i < pst->number_of_dependencies; i++)
2475 if (!pst->dependencies[i]->readin)
2477 /* Inform about additional files that need to be read in. */
2480 /* FIXME: i18n: Need to make this a single string. */
2481 fputs_filtered (" ", gdb_stdout);
2483 fputs_filtered ("and ", gdb_stdout);
2485 printf_filtered ("%s...", pst->dependencies[i]->filename);
2486 wrap_here (""); /* Flush output */
2487 gdb_flush (gdb_stdout);
2489 psymtab_to_symtab_1 (pst->dependencies[i]);
2492 per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
2496 /* It's an include file, no symbols to read for it.
2497 Everything is in the parent symtab. */
2502 back_to = make_cleanup (dwarf2_release_queue, NULL);
2504 queue_comp_unit (per_cu);
2506 process_queue (pst->objfile);
2508 /* Age the cache, releasing compilation units that have not
2509 been used recently. */
2510 age_cached_comp_units ();
2512 do_cleanups (back_to);
2515 /* Load the DIEs associated with PST and PER_CU into memory. */
2517 static struct dwarf2_cu *
2518 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
2520 bfd *abfd = objfile->obfd;
2521 struct dwarf2_cu *cu;
2522 unsigned long offset;
2524 struct cleanup *back_to, *free_cu_cleanup;
2525 struct attribute *attr;
2528 /* Set local variables from the partial symbol table info. */
2529 offset = per_cu->offset;
2531 info_ptr = dwarf2_per_objfile->info_buffer + offset;
2533 cu = xmalloc (sizeof (struct dwarf2_cu));
2534 memset (cu, 0, sizeof (struct dwarf2_cu));
2536 /* If an error occurs while loading, release our storage. */
2537 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
2539 cu->objfile = objfile;
2541 /* read in the comp_unit header */
2542 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
2544 /* Read the abbrevs for this compilation unit */
2545 dwarf2_read_abbrevs (abfd, cu);
2546 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2548 cu->header.offset = offset;
2550 cu->per_cu = per_cu;
2553 /* We use this obstack for block values in dwarf_alloc_block. */
2554 obstack_init (&cu->comp_unit_obstack);
2556 cu->dies = read_comp_unit (info_ptr, abfd, cu);
2558 /* We try not to read any attributes in this function, because not
2559 all objfiles needed for references have been loaded yet, and symbol
2560 table processing isn't initialized. But we have to set the CU language,
2561 or we won't be able to build types correctly. */
2562 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
2564 set_cu_language (DW_UNSND (attr), cu);
2566 set_cu_language (language_minimal, cu);
2568 do_cleanups (back_to);
2570 /* We've successfully allocated this compilation unit. Let our caller
2571 clean it up when finished with it. */
2572 discard_cleanups (free_cu_cleanup);
2577 /* Generate full symbol information for PST and CU, whose DIEs have
2578 already been loaded into memory. */
2581 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
2583 struct partial_symtab *pst = per_cu->psymtab;
2584 struct dwarf2_cu *cu = per_cu->cu;
2585 struct objfile *objfile = pst->objfile;
2586 bfd *abfd = objfile->obfd;
2587 CORE_ADDR lowpc, highpc;
2588 struct symtab *symtab;
2589 struct cleanup *back_to;
2590 struct attribute *attr;
2593 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2595 /* We're in the global namespace. */
2596 processing_current_prefix = "";
2599 back_to = make_cleanup (really_free_pendings, NULL);
2601 cu->list_in_scope = &file_symbols;
2603 /* Find the base address of the compilation unit for range lists and
2604 location lists. It will normally be specified by DW_AT_low_pc.
2605 In DWARF-3 draft 4, the base address could be overridden by
2606 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2607 compilation units with discontinuous ranges. */
2609 cu->header.base_known = 0;
2610 cu->header.base_address = 0;
2612 attr = dwarf2_attr (cu->dies, DW_AT_entry_pc, cu);
2615 cu->header.base_address = DW_ADDR (attr);
2616 cu->header.base_known = 1;
2620 attr = dwarf2_attr (cu->dies, DW_AT_low_pc, cu);
2623 cu->header.base_address = DW_ADDR (attr);
2624 cu->header.base_known = 1;
2628 /* Do line number decoding in read_file_scope () */
2629 process_die (cu->dies, cu);
2631 /* Some compilers don't define a DW_AT_high_pc attribute for the
2632 compilation unit. If the DW_AT_high_pc is missing, synthesize
2633 it, by scanning the DIE's below the compilation unit. */
2634 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
2636 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
2638 /* Set symtab language to language from DW_AT_language.
2639 If the compilation is from a C file generated by language preprocessors,
2640 do not set the language if it was already deduced by start_subfile. */
2642 && !(cu->language == language_c && symtab->language != language_c))
2644 symtab->language = cu->language;
2646 pst->symtab = symtab;
2649 do_cleanups (back_to);
2652 /* Process a die and its children. */
2655 process_die (struct die_info *die, struct dwarf2_cu *cu)
2659 case DW_TAG_padding:
2661 case DW_TAG_compile_unit:
2662 read_file_scope (die, cu);
2664 case DW_TAG_subprogram:
2665 read_subroutine_type (die, cu);
2666 read_func_scope (die, cu);
2668 case DW_TAG_inlined_subroutine:
2669 /* FIXME: These are ignored for now.
2670 They could be used to set breakpoints on all inlined instances
2671 of a function and make GDB `next' properly over inlined functions. */
2673 case DW_TAG_lexical_block:
2674 case DW_TAG_try_block:
2675 case DW_TAG_catch_block:
2676 read_lexical_block_scope (die, cu);
2678 case DW_TAG_class_type:
2679 case DW_TAG_structure_type:
2680 case DW_TAG_union_type:
2681 read_structure_type (die, cu);
2682 process_structure_scope (die, cu);
2684 case DW_TAG_enumeration_type:
2685 read_enumeration_type (die, cu);
2686 process_enumeration_scope (die, cu);
2689 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2690 a symbol or process any children. Therefore it doesn't do anything
2691 that won't be done on-demand by read_type_die. */
2692 case DW_TAG_subroutine_type:
2693 read_subroutine_type (die, cu);
2695 case DW_TAG_set_type:
2696 read_set_type (die, cu);
2698 case DW_TAG_array_type:
2699 read_array_type (die, cu);
2701 case DW_TAG_pointer_type:
2702 read_tag_pointer_type (die, cu);
2704 case DW_TAG_ptr_to_member_type:
2705 read_tag_ptr_to_member_type (die, cu);
2707 case DW_TAG_reference_type:
2708 read_tag_reference_type (die, cu);
2710 case DW_TAG_string_type:
2711 read_tag_string_type (die, cu);
2715 case DW_TAG_base_type:
2716 read_base_type (die, cu);
2717 /* Add a typedef symbol for the type definition, if it has a
2719 new_symbol (die, die->type, cu);
2721 case DW_TAG_subrange_type:
2722 read_subrange_type (die, cu);
2723 /* Add a typedef symbol for the type definition, if it has a
2725 new_symbol (die, die->type, cu);
2727 case DW_TAG_common_block:
2728 read_common_block (die, cu);
2730 case DW_TAG_common_inclusion:
2732 case DW_TAG_namespace:
2733 processing_has_namespace_info = 1;
2734 read_namespace (die, cu);
2736 case DW_TAG_imported_declaration:
2737 case DW_TAG_imported_module:
2738 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2739 information contained in these. DW_TAG_imported_declaration
2740 dies shouldn't have children; DW_TAG_imported_module dies
2741 shouldn't in the C++ case, but conceivably could in the
2742 Fortran case, so we'll have to replace this gdb_assert if
2743 Fortran compilers start generating that info. */
2744 processing_has_namespace_info = 1;
2745 gdb_assert (die->child == NULL);
2748 new_symbol (die, NULL, cu);
2754 initialize_cu_func_list (struct dwarf2_cu *cu)
2756 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
2760 free_cu_line_header (void *arg)
2762 struct dwarf2_cu *cu = arg;
2764 free_line_header (cu->line_header);
2765 cu->line_header = NULL;
2769 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
2771 struct objfile *objfile = cu->objfile;
2772 struct comp_unit_head *cu_header = &cu->header;
2773 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2774 CORE_ADDR lowpc = ((CORE_ADDR) -1);
2775 CORE_ADDR highpc = ((CORE_ADDR) 0);
2776 struct attribute *attr;
2778 char *comp_dir = NULL;
2779 struct die_info *child_die;
2780 bfd *abfd = objfile->obfd;
2781 struct line_header *line_header = 0;
2784 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2786 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
2788 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2789 from finish_block. */
2790 if (lowpc == ((CORE_ADDR) -1))
2795 /* Find the filename. Do not use dwarf2_name here, since the filename
2796 is not a source language identifier. */
2797 attr = dwarf2_attr (die, DW_AT_name, cu);
2800 name = DW_STRING (attr);
2803 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
2805 comp_dir = DW_STRING (attr);
2806 else if (name != NULL && IS_ABSOLUTE_PATH (name))
2808 comp_dir = ldirname (name);
2809 if (comp_dir != NULL)
2810 make_cleanup (xfree, comp_dir);
2812 if (comp_dir != NULL)
2814 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2815 directory, get rid of it. */
2816 char *cp = strchr (comp_dir, ':');
2818 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
2825 attr = dwarf2_attr (die, DW_AT_language, cu);
2828 set_cu_language (DW_UNSND (attr), cu);
2831 attr = dwarf2_attr (die, DW_AT_producer, cu);
2833 cu->producer = DW_STRING (attr);
2835 /* We assume that we're processing GCC output. */
2836 processing_gcc_compilation = 2;
2838 start_symtab (name, comp_dir, lowpc);
2839 record_debugformat ("DWARF 2");
2840 record_producer (cu->producer);
2842 initialize_cu_func_list (cu);
2844 /* Decode line number information if present. We do this before
2845 processing child DIEs, so that the line header table is available
2846 for DW_AT_decl_file. */
2847 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2850 unsigned int line_offset = DW_UNSND (attr);
2851 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
2854 cu->line_header = line_header;
2855 make_cleanup (free_cu_line_header, cu);
2856 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
2860 /* Process all dies in compilation unit. */
2861 if (die->child != NULL)
2863 child_die = die->child;
2864 while (child_die && child_die->tag)
2866 process_die (child_die, cu);
2867 child_die = sibling_die (child_die);
2871 /* Decode macro information, if present. Dwarf 2 macro information
2872 refers to information in the line number info statement program
2873 header, so we can only read it if we've read the header
2875 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
2876 if (attr && line_header)
2878 unsigned int macro_offset = DW_UNSND (attr);
2879 dwarf_decode_macros (line_header, macro_offset,
2880 comp_dir, abfd, cu);
2882 do_cleanups (back_to);
2886 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
2887 struct dwarf2_cu *cu)
2889 struct function_range *thisfn;
2891 thisfn = (struct function_range *)
2892 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
2893 thisfn->name = name;
2894 thisfn->lowpc = lowpc;
2895 thisfn->highpc = highpc;
2896 thisfn->seen_line = 0;
2897 thisfn->next = NULL;
2899 if (cu->last_fn == NULL)
2900 cu->first_fn = thisfn;
2902 cu->last_fn->next = thisfn;
2904 cu->last_fn = thisfn;
2908 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
2910 struct objfile *objfile = cu->objfile;
2911 struct context_stack *new;
2914 struct die_info *child_die;
2915 struct attribute *attr;
2917 const char *previous_prefix = processing_current_prefix;
2918 struct cleanup *back_to = NULL;
2920 struct block *block;
2922 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2924 name = dwarf2_linkage_name (die, cu);
2926 /* Ignore functions with missing or empty names and functions with
2927 missing or invalid low and high pc attributes. */
2928 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
2931 if (cu->language == language_cplus
2932 || cu->language == language_java)
2934 struct die_info *spec_die = die_specification (die, cu);
2936 /* NOTE: carlton/2004-01-23: We have to be careful in the
2937 presence of DW_AT_specification. For example, with GCC 3.4,
2942 // Definition of N::foo.
2946 then we'll have a tree of DIEs like this:
2948 1: DW_TAG_compile_unit
2949 2: DW_TAG_namespace // N
2950 3: DW_TAG_subprogram // declaration of N::foo
2951 4: DW_TAG_subprogram // definition of N::foo
2952 DW_AT_specification // refers to die #3
2954 Thus, when processing die #4, we have to pretend that we're
2955 in the context of its DW_AT_specification, namely the contex
2958 if (spec_die != NULL)
2960 char *specification_prefix = determine_prefix (spec_die, cu);
2961 processing_current_prefix = specification_prefix;
2962 back_to = make_cleanup (xfree, specification_prefix);
2969 /* Record the function range for dwarf_decode_lines. */
2970 add_to_cu_func_list (name, lowpc, highpc, cu);
2972 new = push_context (0, lowpc);
2973 new->name = new_symbol (die, die->type, cu);
2975 /* If there is a location expression for DW_AT_frame_base, record
2977 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
2979 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2980 expression is being recorded directly in the function's symbol
2981 and not in a separate frame-base object. I guess this hack is
2982 to avoid adding some sort of frame-base adjunct/annex to the
2983 function's symbol :-(. The problem with doing this is that it
2984 results in a function symbol with a location expression that
2985 has nothing to do with the location of the function, ouch! The
2986 relationship should be: a function's symbol has-a frame base; a
2987 frame-base has-a location expression. */
2988 dwarf2_symbol_mark_computed (attr, new->name, cu);
2990 cu->list_in_scope = &local_symbols;
2992 if (die->child != NULL)
2994 child_die = die->child;
2995 while (child_die && child_die->tag)
2997 process_die (child_die, cu);
2998 child_die = sibling_die (child_die);
3002 new = pop_context ();
3003 /* Make a block for the local symbols within. */
3004 block = finish_block (new->name, &local_symbols, new->old_blocks,
3005 lowpc, highpc, objfile);
3007 /* If we have address ranges, record them. */
3008 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3010 /* In C++, we can have functions nested inside functions (e.g., when
3011 a function declares a class that has methods). This means that
3012 when we finish processing a function scope, we may need to go
3013 back to building a containing block's symbol lists. */
3014 local_symbols = new->locals;
3015 param_symbols = new->params;
3017 /* If we've finished processing a top-level function, subsequent
3018 symbols go in the file symbol list. */
3019 if (outermost_context_p ())
3020 cu->list_in_scope = &file_symbols;
3022 processing_current_prefix = previous_prefix;
3023 if (back_to != NULL)
3024 do_cleanups (back_to);
3027 /* Process all the DIES contained within a lexical block scope. Start
3028 a new scope, process the dies, and then close the scope. */
3031 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
3033 struct objfile *objfile = cu->objfile;
3034 struct context_stack *new;
3035 CORE_ADDR lowpc, highpc;
3036 struct die_info *child_die;
3039 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3041 /* Ignore blocks with missing or invalid low and high pc attributes. */
3042 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3043 as multiple lexical blocks? Handling children in a sane way would
3044 be nasty. Might be easier to properly extend generic blocks to
3046 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
3051 push_context (0, lowpc);
3052 if (die->child != NULL)
3054 child_die = die->child;
3055 while (child_die && child_die->tag)
3057 process_die (child_die, cu);
3058 child_die = sibling_die (child_die);
3061 new = pop_context ();
3063 if (local_symbols != NULL)
3066 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
3069 /* Note that recording ranges after traversing children, as we
3070 do here, means that recording a parent's ranges entails
3071 walking across all its children's ranges as they appear in
3072 the address map, which is quadratic behavior.
3074 It would be nicer to record the parent's ranges before
3075 traversing its children, simply overriding whatever you find
3076 there. But since we don't even decide whether to create a
3077 block until after we've traversed its children, that's hard
3079 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3081 local_symbols = new->locals;
3084 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3085 Return 1 if the attributes are present and valid, otherwise, return 0. */
3088 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
3089 CORE_ADDR *high_return, struct dwarf2_cu *cu)
3091 struct objfile *objfile = cu->objfile;
3092 struct comp_unit_head *cu_header = &cu->header;
3093 bfd *obfd = objfile->obfd;
3094 unsigned int addr_size = cu_header->addr_size;
3095 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3096 /* Base address selection entry. */
3106 found_base = cu_header->base_known;
3107 base = cu_header->base_address;
3109 if (offset >= dwarf2_per_objfile->ranges_size)
3111 complaint (&symfile_complaints,
3112 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3116 buffer = dwarf2_per_objfile->ranges_buffer + offset;
3118 /* Read in the largest possible address. */
3119 marker = read_address (obfd, buffer, cu, &dummy);
3120 if ((marker & mask) == mask)
3122 /* If we found the largest possible address, then
3123 read the base address. */
3124 base = read_address (obfd, buffer + addr_size, cu, &dummy);
3125 buffer += 2 * addr_size;
3126 offset += 2 * addr_size;
3134 CORE_ADDR range_beginning, range_end;
3136 range_beginning = read_address (obfd, buffer, cu, &dummy);
3137 buffer += addr_size;
3138 range_end = read_address (obfd, buffer, cu, &dummy);
3139 buffer += addr_size;
3140 offset += 2 * addr_size;
3142 /* An end of list marker is a pair of zero addresses. */
3143 if (range_beginning == 0 && range_end == 0)
3144 /* Found the end of list entry. */
3147 /* Each base address selection entry is a pair of 2 values.
3148 The first is the largest possible address, the second is
3149 the base address. Check for a base address here. */
3150 if ((range_beginning & mask) == mask)
3152 /* If we found the largest possible address, then
3153 read the base address. */
3154 base = read_address (obfd, buffer + addr_size, cu, &dummy);
3161 /* We have no valid base address for the ranges
3163 complaint (&symfile_complaints,
3164 _("Invalid .debug_ranges data (no base address)"));
3168 range_beginning += base;
3171 /* FIXME: This is recording everything as a low-high
3172 segment of consecutive addresses. We should have a
3173 data structure for discontiguous block ranges
3177 low = range_beginning;
3183 if (range_beginning < low)
3184 low = range_beginning;
3185 if (range_end > high)
3191 /* If the first entry is an end-of-list marker, the range
3192 describes an empty scope, i.e. no instructions. */
3198 *high_return = high;
3202 /* Get low and high pc attributes from a die. Return 1 if the attributes
3203 are present and valid, otherwise, return 0. Return -1 if the range is
3204 discontinuous, i.e. derived from DW_AT_ranges information. */
3206 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
3207 CORE_ADDR *highpc, struct dwarf2_cu *cu)
3209 struct attribute *attr;
3214 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
3217 high = DW_ADDR (attr);
3218 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3220 low = DW_ADDR (attr);
3222 /* Found high w/o low attribute. */
3225 /* Found consecutive range of addresses. */
3230 attr = dwarf2_attr (die, DW_AT_ranges, cu);
3233 /* Value of the DW_AT_ranges attribute is the offset in the
3234 .debug_ranges section. */
3235 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu))
3237 /* Found discontinuous range of addresses. */
3245 /* When using the GNU linker, .gnu.linkonce. sections are used to
3246 eliminate duplicate copies of functions and vtables and such.
3247 The linker will arbitrarily choose one and discard the others.
3248 The AT_*_pc values for such functions refer to local labels in
3249 these sections. If the section from that file was discarded, the
3250 labels are not in the output, so the relocs get a value of 0.
3251 If this is a discarded function, mark the pc bounds as invalid,
3252 so that GDB will ignore it. */
3253 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
3261 /* Get the low and high pc's represented by the scope DIE, and store
3262 them in *LOWPC and *HIGHPC. If the correct values can't be
3263 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3266 get_scope_pc_bounds (struct die_info *die,
3267 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3268 struct dwarf2_cu *cu)
3270 CORE_ADDR best_low = (CORE_ADDR) -1;
3271 CORE_ADDR best_high = (CORE_ADDR) 0;
3272 CORE_ADDR current_low, current_high;
3274 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu))
3276 best_low = current_low;
3277 best_high = current_high;
3281 struct die_info *child = die->child;
3283 while (child && child->tag)
3285 switch (child->tag) {
3286 case DW_TAG_subprogram:
3287 if (dwarf2_get_pc_bounds (child, ¤t_low, ¤t_high, cu))
3289 best_low = min (best_low, current_low);
3290 best_high = max (best_high, current_high);
3293 case DW_TAG_namespace:
3294 /* FIXME: carlton/2004-01-16: Should we do this for
3295 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3296 that current GCC's always emit the DIEs corresponding
3297 to definitions of methods of classes as children of a
3298 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3299 the DIEs giving the declarations, which could be
3300 anywhere). But I don't see any reason why the
3301 standards says that they have to be there. */
3302 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
3304 if (current_low != ((CORE_ADDR) -1))
3306 best_low = min (best_low, current_low);
3307 best_high = max (best_high, current_high);
3315 child = sibling_die (child);
3320 *highpc = best_high;
3323 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
3326 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
3327 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
3329 struct attribute *attr;
3331 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
3334 CORE_ADDR high = DW_ADDR (attr);
3335 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3338 CORE_ADDR low = DW_ADDR (attr);
3339 record_block_range (block, baseaddr + low, baseaddr + high - 1);
3343 attr = dwarf2_attr (die, DW_AT_ranges, cu);
3346 bfd *obfd = cu->objfile->obfd;
3348 /* The value of the DW_AT_ranges attribute is the offset of the
3349 address range list in the .debug_ranges section. */
3350 unsigned long offset = DW_UNSND (attr);
3351 gdb_byte *buffer = dwarf2_per_objfile->ranges_buffer + offset;
3353 /* For some target architectures, but not others, the
3354 read_address function sign-extends the addresses it returns.
3355 To recognize base address selection entries, we need a
3357 unsigned int addr_size = cu->header.addr_size;
3358 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3360 /* The base address, to which the next pair is relative. Note
3361 that this 'base' is a DWARF concept: most entries in a range
3362 list are relative, to reduce the number of relocs against the
3363 debugging information. This is separate from this function's
3364 'baseaddr' argument, which GDB uses to relocate debugging
3365 information from a shared library based on the address at
3366 which the library was loaded. */
3367 CORE_ADDR base = cu->header.base_address;
3368 int base_known = cu->header.base_known;
3370 if (offset >= dwarf2_per_objfile->ranges_size)
3372 complaint (&symfile_complaints,
3373 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
3380 unsigned int bytes_read;
3381 CORE_ADDR start, end;
3383 start = read_address (obfd, buffer, cu, &bytes_read);
3384 buffer += bytes_read;
3385 end = read_address (obfd, buffer, cu, &bytes_read);
3386 buffer += bytes_read;
3388 /* Did we find the end of the range list? */
3389 if (start == 0 && end == 0)
3392 /* Did we find a base address selection entry? */
3393 else if ((start & base_select_mask) == base_select_mask)
3399 /* We found an ordinary address range. */
3404 complaint (&symfile_complaints,
3405 _("Invalid .debug_ranges data (no base address)"));
3409 record_block_range (block,
3410 baseaddr + base + start,
3411 baseaddr + base + end - 1);
3417 /* Add an aggregate field to the field list. */
3420 dwarf2_add_field (struct field_info *fip, struct die_info *die,
3421 struct dwarf2_cu *cu)
3423 struct objfile *objfile = cu->objfile;
3424 struct nextfield *new_field;
3425 struct attribute *attr;
3427 char *fieldname = "";
3429 /* Allocate a new field list entry and link it in. */
3430 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3431 make_cleanup (xfree, new_field);
3432 memset (new_field, 0, sizeof (struct nextfield));
3433 new_field->next = fip->fields;
3434 fip->fields = new_field;
3437 /* Handle accessibility and virtuality of field.
3438 The default accessibility for members is public, the default
3439 accessibility for inheritance is private. */
3440 if (die->tag != DW_TAG_inheritance)
3441 new_field->accessibility = DW_ACCESS_public;
3443 new_field->accessibility = DW_ACCESS_private;
3444 new_field->virtuality = DW_VIRTUALITY_none;
3446 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
3448 new_field->accessibility = DW_UNSND (attr);
3449 if (new_field->accessibility != DW_ACCESS_public)
3450 fip->non_public_fields = 1;
3451 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
3453 new_field->virtuality = DW_UNSND (attr);
3455 fp = &new_field->field;
3457 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
3459 /* Data member other than a C++ static data member. */
3461 /* Get type of field. */
3462 fp->type = die_type (die, cu);
3464 FIELD_STATIC_KIND (*fp) = 0;
3466 /* Get bit size of field (zero if none). */
3467 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
3470 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
3474 FIELD_BITSIZE (*fp) = 0;
3477 /* Get bit offset of field. */
3478 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
3483 if (attr_form_is_section_offset (attr))
3485 dwarf2_complex_location_expr_complaint ();
3488 else if (attr_form_is_constant (attr))
3489 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
3491 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
3493 FIELD_BITPOS (*fp) = byte_offset * bits_per_byte;
3496 FIELD_BITPOS (*fp) = 0;
3497 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
3500 if (BITS_BIG_ENDIAN)
3502 /* For big endian bits, the DW_AT_bit_offset gives the
3503 additional bit offset from the MSB of the containing
3504 anonymous object to the MSB of the field. We don't
3505 have to do anything special since we don't need to
3506 know the size of the anonymous object. */
3507 FIELD_BITPOS (*fp) += DW_UNSND (attr);
3511 /* For little endian bits, compute the bit offset to the
3512 MSB of the anonymous object, subtract off the number of
3513 bits from the MSB of the field to the MSB of the
3514 object, and then subtract off the number of bits of
3515 the field itself. The result is the bit offset of
3516 the LSB of the field. */
3518 int bit_offset = DW_UNSND (attr);
3520 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
3523 /* The size of the anonymous object containing
3524 the bit field is explicit, so use the
3525 indicated size (in bytes). */
3526 anonymous_size = DW_UNSND (attr);
3530 /* The size of the anonymous object containing
3531 the bit field must be inferred from the type
3532 attribute of the data member containing the
3534 anonymous_size = TYPE_LENGTH (fp->type);
3536 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
3537 - bit_offset - FIELD_BITSIZE (*fp);
3541 /* Get name of field. */
3542 fieldname = dwarf2_name (die, cu);
3543 if (fieldname == NULL)
3546 /* The name is already allocated along with this objfile, so we don't
3547 need to duplicate it for the type. */
3548 fp->name = fieldname;
3550 /* Change accessibility for artificial fields (e.g. virtual table
3551 pointer or virtual base class pointer) to private. */
3552 if (dwarf2_attr (die, DW_AT_artificial, cu))
3554 new_field->accessibility = DW_ACCESS_private;
3555 fip->non_public_fields = 1;
3558 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
3560 /* C++ static member. */
3562 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3563 is a declaration, but all versions of G++ as of this writing
3564 (so through at least 3.2.1) incorrectly generate
3565 DW_TAG_variable tags. */
3569 /* Get name of field. */
3570 fieldname = dwarf2_name (die, cu);
3571 if (fieldname == NULL)
3574 /* Get physical name. */
3575 physname = dwarf2_linkage_name (die, cu);
3577 /* The name is already allocated along with this objfile, so we don't
3578 need to duplicate it for the type. */
3579 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
3580 FIELD_TYPE (*fp) = die_type (die, cu);
3581 FIELD_NAME (*fp) = fieldname;
3583 else if (die->tag == DW_TAG_inheritance)
3585 /* C++ base class field. */
3586 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
3588 FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu)
3590 FIELD_BITSIZE (*fp) = 0;
3591 FIELD_STATIC_KIND (*fp) = 0;
3592 FIELD_TYPE (*fp) = die_type (die, cu);
3593 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
3594 fip->nbaseclasses++;
3598 /* Create the vector of fields, and attach it to the type. */
3601 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
3602 struct dwarf2_cu *cu)
3604 int nfields = fip->nfields;
3606 /* Record the field count, allocate space for the array of fields,
3607 and create blank accessibility bitfields if necessary. */
3608 TYPE_NFIELDS (type) = nfields;
3609 TYPE_FIELDS (type) = (struct field *)
3610 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3611 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3613 if (fip->non_public_fields)
3615 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3617 TYPE_FIELD_PRIVATE_BITS (type) =
3618 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3619 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3621 TYPE_FIELD_PROTECTED_BITS (type) =
3622 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3623 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3625 TYPE_FIELD_IGNORE_BITS (type) =
3626 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3627 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3630 /* If the type has baseclasses, allocate and clear a bit vector for
3631 TYPE_FIELD_VIRTUAL_BITS. */
3632 if (fip->nbaseclasses)
3634 int num_bytes = B_BYTES (fip->nbaseclasses);
3635 unsigned char *pointer;
3637 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3638 pointer = TYPE_ALLOC (type, num_bytes);
3639 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
3640 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
3641 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
3644 /* Copy the saved-up fields into the field vector. Start from the head
3645 of the list, adding to the tail of the field array, so that they end
3646 up in the same order in the array in which they were added to the list. */
3647 while (nfields-- > 0)
3649 TYPE_FIELD (type, nfields) = fip->fields->field;
3650 switch (fip->fields->accessibility)
3652 case DW_ACCESS_private:
3653 SET_TYPE_FIELD_PRIVATE (type, nfields);
3656 case DW_ACCESS_protected:
3657 SET_TYPE_FIELD_PROTECTED (type, nfields);
3660 case DW_ACCESS_public:
3664 /* Unknown accessibility. Complain and treat it as public. */
3666 complaint (&symfile_complaints, _("unsupported accessibility %d"),
3667 fip->fields->accessibility);
3671 if (nfields < fip->nbaseclasses)
3673 switch (fip->fields->virtuality)
3675 case DW_VIRTUALITY_virtual:
3676 case DW_VIRTUALITY_pure_virtual:
3677 SET_TYPE_FIELD_VIRTUAL (type, nfields);
3681 fip->fields = fip->fields->next;
3685 /* Add a member function to the proper fieldlist. */
3688 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
3689 struct type *type, struct dwarf2_cu *cu)
3691 struct objfile *objfile = cu->objfile;
3692 struct attribute *attr;
3693 struct fnfieldlist *flp;
3695 struct fn_field *fnp;
3698 struct nextfnfield *new_fnfield;
3700 /* Get name of member function. */
3701 fieldname = dwarf2_name (die, cu);
3702 if (fieldname == NULL)
3705 /* Get the mangled name. */
3706 physname = dwarf2_linkage_name (die, cu);
3708 /* Look up member function name in fieldlist. */
3709 for (i = 0; i < fip->nfnfields; i++)
3711 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
3715 /* Create new list element if necessary. */
3716 if (i < fip->nfnfields)
3717 flp = &fip->fnfieldlists[i];
3720 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
3722 fip->fnfieldlists = (struct fnfieldlist *)
3723 xrealloc (fip->fnfieldlists,
3724 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
3725 * sizeof (struct fnfieldlist));
3726 if (fip->nfnfields == 0)
3727 make_cleanup (free_current_contents, &fip->fnfieldlists);
3729 flp = &fip->fnfieldlists[fip->nfnfields];
3730 flp->name = fieldname;
3736 /* Create a new member function field and chain it to the field list
3738 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
3739 make_cleanup (xfree, new_fnfield);
3740 memset (new_fnfield, 0, sizeof (struct nextfnfield));
3741 new_fnfield->next = flp->head;
3742 flp->head = new_fnfield;
3745 /* Fill in the member function field info. */
3746 fnp = &new_fnfield->fnfield;
3747 /* The name is already allocated along with this objfile, so we don't
3748 need to duplicate it for the type. */
3749 fnp->physname = physname ? physname : "";
3750 fnp->type = alloc_type (objfile);
3751 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
3753 int nparams = TYPE_NFIELDS (die->type);
3755 /* TYPE is the domain of this method, and DIE->TYPE is the type
3756 of the method itself (TYPE_CODE_METHOD). */
3757 smash_to_method_type (fnp->type, type,
3758 TYPE_TARGET_TYPE (die->type),
3759 TYPE_FIELDS (die->type),
3760 TYPE_NFIELDS (die->type),
3761 TYPE_VARARGS (die->type));
3763 /* Handle static member functions.
3764 Dwarf2 has no clean way to discern C++ static and non-static
3765 member functions. G++ helps GDB by marking the first
3766 parameter for non-static member functions (which is the
3767 this pointer) as artificial. We obtain this information
3768 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3769 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
3770 fnp->voffset = VOFFSET_STATIC;
3773 complaint (&symfile_complaints, _("member function type missing for '%s'"),
3776 /* Get fcontext from DW_AT_containing_type if present. */
3777 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
3778 fnp->fcontext = die_containing_type (die, cu);
3780 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3781 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3783 /* Get accessibility. */
3784 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
3787 switch (DW_UNSND (attr))
3789 case DW_ACCESS_private:
3790 fnp->is_private = 1;
3792 case DW_ACCESS_protected:
3793 fnp->is_protected = 1;
3798 /* Check for artificial methods. */
3799 attr = dwarf2_attr (die, DW_AT_artificial, cu);
3800 if (attr && DW_UNSND (attr) != 0)
3801 fnp->is_artificial = 1;
3803 /* Get index in virtual function table if it is a virtual member function. */
3804 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
3807 /* Support the .debug_loc offsets */
3808 if (attr_form_is_block (attr))
3810 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
3812 else if (attr_form_is_section_offset (attr))
3814 dwarf2_complex_location_expr_complaint ();
3818 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3824 /* Create the vector of member function fields, and attach it to the type. */
3827 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
3828 struct dwarf2_cu *cu)
3830 struct fnfieldlist *flp;
3831 int total_length = 0;
3834 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3835 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
3836 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
3838 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
3840 struct nextfnfield *nfp = flp->head;
3841 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
3844 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
3845 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
3846 fn_flp->fn_fields = (struct fn_field *)
3847 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
3848 for (k = flp->length; (k--, nfp); nfp = nfp->next)
3849 fn_flp->fn_fields[k] = nfp->fnfield;
3851 total_length += flp->length;
3854 TYPE_NFN_FIELDS (type) = fip->nfnfields;
3855 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
3858 /* Returns non-zero if NAME is the name of a vtable member in CU's
3859 language, zero otherwise. */
3861 is_vtable_name (const char *name, struct dwarf2_cu *cu)
3863 static const char vptr[] = "_vptr";
3864 static const char vtable[] = "vtable";
3866 /* Look for the C++ and Java forms of the vtable. */
3867 if ((cu->language == language_java
3868 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
3869 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
3870 && is_cplus_marker (name[sizeof (vptr) - 1])))
3876 /* GCC outputs unnamed structures that are really pointers to member
3877 functions, with the ABI-specified layout. If DIE (from CU) describes
3878 such a structure, set its type, and return nonzero. Otherwise return
3881 GCC shouldn't do this; it should just output pointer to member DIEs.
3882 This is GCC PR debug/28767. */
3885 quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
3887 struct objfile *objfile = cu->objfile;
3889 struct die_info *pfn_die, *delta_die;
3890 struct attribute *pfn_name, *delta_name;
3891 struct type *pfn_type, *domain_type;
3893 /* Check for a structure with no name and two children. */
3894 if (die->tag != DW_TAG_structure_type
3895 || dwarf2_attr (die, DW_AT_name, cu) != NULL
3896 || die->child == NULL
3897 || die->child->sibling == NULL
3898 || (die->child->sibling->sibling != NULL
3899 && die->child->sibling->sibling->tag != DW_TAG_padding))
3902 /* Check for __pfn and __delta members. */
3903 pfn_die = die->child;
3904 pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
3905 if (pfn_die->tag != DW_TAG_member
3907 || DW_STRING (pfn_name) == NULL
3908 || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
3911 delta_die = pfn_die->sibling;
3912 delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
3913 if (delta_die->tag != DW_TAG_member
3914 || delta_name == NULL
3915 || DW_STRING (delta_name) == NULL
3916 || strcmp ("__delta", DW_STRING (delta_name)) != 0)
3919 /* Find the type of the method. */
3920 pfn_type = die_type (pfn_die, cu);
3921 if (pfn_type == NULL
3922 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
3923 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
3926 /* Look for the "this" argument. */
3927 pfn_type = TYPE_TARGET_TYPE (pfn_type);
3928 if (TYPE_NFIELDS (pfn_type) == 0
3929 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
3932 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
3933 type = alloc_type (objfile);
3934 smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
3935 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
3936 TYPE_VARARGS (pfn_type));
3937 type = lookup_methodptr_type (type);
3938 set_die_type (die, type, cu);
3943 /* Called when we find the DIE that starts a structure or union scope
3944 (definition) to process all dies that define the members of the
3947 NOTE: we need to call struct_type regardless of whether or not the
3948 DIE has an at_name attribute, since it might be an anonymous
3949 structure or union. This gets the type entered into our set of
3952 However, if the structure is incomplete (an opaque struct/union)
3953 then suppress creating a symbol table entry for it since gdb only
3954 wants to find the one with the complete definition. Note that if
3955 it is complete, we just call new_symbol, which does it's own
3956 checking about whether the struct/union is anonymous or not (and
3957 suppresses creating a symbol table entry itself). */
3960 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
3962 struct objfile *objfile = cu->objfile;
3964 struct attribute *attr;
3965 const char *previous_prefix = processing_current_prefix;
3966 struct cleanup *back_to = NULL;
3972 if (quirk_gcc_member_function_pointer (die, cu))
3975 type = alloc_type (objfile);
3976 INIT_CPLUS_SPECIFIC (type);
3977 name = dwarf2_name (die, cu);
3980 if (cu->language == language_cplus
3981 || cu->language == language_java)
3983 char *new_prefix = determine_class_name (die, cu);
3984 TYPE_TAG_NAME (type) = obsavestring (new_prefix,
3985 strlen (new_prefix),
3986 &objfile->objfile_obstack);
3987 back_to = make_cleanup (xfree, new_prefix);
3988 processing_current_prefix = new_prefix;
3992 /* The name is already allocated along with this objfile, so
3993 we don't need to duplicate it for the type. */
3994 TYPE_TAG_NAME (type) = name;
3998 if (die->tag == DW_TAG_structure_type)
4000 TYPE_CODE (type) = TYPE_CODE_STRUCT;
4002 else if (die->tag == DW_TAG_union_type)
4004 TYPE_CODE (type) = TYPE_CODE_UNION;
4008 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4010 TYPE_CODE (type) = TYPE_CODE_CLASS;
4013 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4016 TYPE_LENGTH (type) = DW_UNSND (attr);
4020 TYPE_LENGTH (type) = 0;
4023 TYPE_FLAGS (type) |= TYPE_FLAG_STUB_SUPPORTED;
4024 if (die_is_declaration (die, cu))
4025 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
4027 /* We need to add the type field to the die immediately so we don't
4028 infinitely recurse when dealing with pointers to the structure
4029 type within the structure itself. */
4030 set_die_type (die, type, cu);
4032 if (die->child != NULL && ! die_is_declaration (die, cu))
4034 struct field_info fi;
4035 struct die_info *child_die;
4036 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
4038 memset (&fi, 0, sizeof (struct field_info));
4040 child_die = die->child;
4042 while (child_die && child_die->tag)
4044 if (child_die->tag == DW_TAG_member
4045 || child_die->tag == DW_TAG_variable)
4047 /* NOTE: carlton/2002-11-05: A C++ static data member
4048 should be a DW_TAG_member that is a declaration, but
4049 all versions of G++ as of this writing (so through at
4050 least 3.2.1) incorrectly generate DW_TAG_variable
4051 tags for them instead. */
4052 dwarf2_add_field (&fi, child_die, cu);
4054 else if (child_die->tag == DW_TAG_subprogram)
4056 /* C++ member function. */
4057 read_type_die (child_die, cu);
4058 dwarf2_add_member_fn (&fi, child_die, type, cu);
4060 else if (child_die->tag == DW_TAG_inheritance)
4062 /* C++ base class field. */
4063 dwarf2_add_field (&fi, child_die, cu);
4065 child_die = sibling_die (child_die);
4068 /* Attach fields and member functions to the type. */
4070 dwarf2_attach_fields_to_type (&fi, type, cu);
4073 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
4075 /* Get the type which refers to the base class (possibly this
4076 class itself) which contains the vtable pointer for the current
4077 class from the DW_AT_containing_type attribute. */
4079 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4081 struct type *t = die_containing_type (die, cu);
4083 TYPE_VPTR_BASETYPE (type) = t;
4088 /* Our own class provides vtbl ptr. */
4089 for (i = TYPE_NFIELDS (t) - 1;
4090 i >= TYPE_N_BASECLASSES (t);
4093 char *fieldname = TYPE_FIELD_NAME (t, i);
4095 if (is_vtable_name (fieldname, cu))
4097 TYPE_VPTR_FIELDNO (type) = i;
4102 /* Complain if virtual function table field not found. */
4103 if (i < TYPE_N_BASECLASSES (t))
4104 complaint (&symfile_complaints,
4105 _("virtual function table pointer not found when defining class '%s'"),
4106 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
4111 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
4114 else if (cu->producer
4115 && strncmp (cu->producer,
4116 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4118 /* The IBM XLC compiler does not provide direct indication
4119 of the containing type, but the vtable pointer is
4120 always named __vfp. */
4124 for (i = TYPE_NFIELDS (type) - 1;
4125 i >= TYPE_N_BASECLASSES (type);
4128 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
4130 TYPE_VPTR_FIELDNO (type) = i;
4131 TYPE_VPTR_BASETYPE (type) = type;
4138 do_cleanups (back_to);
4141 processing_current_prefix = previous_prefix;
4142 if (back_to != NULL)
4143 do_cleanups (back_to);
4147 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
4149 struct objfile *objfile = cu->objfile;
4150 const char *previous_prefix = processing_current_prefix;
4151 struct die_info *child_die = die->child;
4153 if (TYPE_TAG_NAME (die->type) != NULL)
4154 processing_current_prefix = TYPE_TAG_NAME (die->type);
4156 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4157 snapshots) has been known to create a die giving a declaration
4158 for a class that has, as a child, a die giving a definition for a
4159 nested class. So we have to process our children even if the
4160 current die is a declaration. Normally, of course, a declaration
4161 won't have any children at all. */
4163 while (child_die != NULL && child_die->tag)
4165 if (child_die->tag == DW_TAG_member
4166 || child_die->tag == DW_TAG_variable
4167 || child_die->tag == DW_TAG_inheritance)
4172 process_die (child_die, cu);
4174 child_die = sibling_die (child_die);
4177 /* Do not consider external references. According to the DWARF standard,
4178 these DIEs are identified by the fact that they have no byte_size
4179 attribute, and a declaration attribute. */
4180 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
4181 || !die_is_declaration (die, cu))
4182 new_symbol (die, die->type, cu);
4184 processing_current_prefix = previous_prefix;
4187 /* Given a DW_AT_enumeration_type die, set its type. We do not
4188 complete the type's fields yet, or create any symbols. */
4191 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
4193 struct objfile *objfile = cu->objfile;
4195 struct attribute *attr;
4201 type = alloc_type (objfile);
4203 TYPE_CODE (type) = TYPE_CODE_ENUM;
4204 name = dwarf2_name (die, cu);
4207 if (processing_has_namespace_info)
4209 TYPE_TAG_NAME (type) = typename_concat (&objfile->objfile_obstack,
4210 processing_current_prefix,
4215 /* The name is already allocated along with this objfile, so
4216 we don't need to duplicate it for the type. */
4217 TYPE_TAG_NAME (type) = name;
4221 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4224 TYPE_LENGTH (type) = DW_UNSND (attr);
4228 TYPE_LENGTH (type) = 0;
4231 set_die_type (die, type, cu);
4234 /* Determine the name of the type represented by DIE, which should be
4235 a named C++ or Java compound type. Return the name in question; the caller
4236 is responsible for xfree()'ing it. */
4239 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
4241 struct cleanup *back_to = NULL;
4242 struct die_info *spec_die = die_specification (die, cu);
4243 char *new_prefix = NULL;
4245 /* If this is the definition of a class that is declared by another
4246 die, then processing_current_prefix may not be accurate; see
4247 read_func_scope for a similar example. */
4248 if (spec_die != NULL)
4250 char *specification_prefix = determine_prefix (spec_die, cu);
4251 processing_current_prefix = specification_prefix;
4252 back_to = make_cleanup (xfree, specification_prefix);
4255 /* If we don't have namespace debug info, guess the name by trying
4256 to demangle the names of members, just like we did in
4257 guess_structure_name. */
4258 if (!processing_has_namespace_info)
4260 struct die_info *child;
4262 for (child = die->child;
4263 child != NULL && child->tag != 0;
4264 child = sibling_die (child))
4266 if (child->tag == DW_TAG_subprogram)
4269 = language_class_name_from_physname (cu->language_defn,
4273 if (new_prefix != NULL)
4279 if (new_prefix == NULL)
4281 const char *name = dwarf2_name (die, cu);
4282 new_prefix = typename_concat (NULL, processing_current_prefix,
4283 name ? name : "<<anonymous>>",
4287 if (back_to != NULL)
4288 do_cleanups (back_to);
4293 /* Given a pointer to a die which begins an enumeration, process all
4294 the dies that define the members of the enumeration, and create the
4295 symbol for the enumeration type.
4297 NOTE: We reverse the order of the element list. */
4300 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
4302 struct objfile *objfile = cu->objfile;
4303 struct die_info *child_die;
4304 struct field *fields;
4307 int unsigned_enum = 1;
4312 if (die->child != NULL)
4314 child_die = die->child;
4315 while (child_die && child_die->tag)
4317 if (child_die->tag != DW_TAG_enumerator)
4319 process_die (child_die, cu);
4323 name = dwarf2_name (child_die, cu);
4326 sym = new_symbol (child_die, die->type, cu);
4327 if (SYMBOL_VALUE (sym) < 0)
4330 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
4332 fields = (struct field *)
4334 (num_fields + DW_FIELD_ALLOC_CHUNK)
4335 * sizeof (struct field));
4338 FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
4339 FIELD_TYPE (fields[num_fields]) = NULL;
4340 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
4341 FIELD_BITSIZE (fields[num_fields]) = 0;
4342 FIELD_STATIC_KIND (fields[num_fields]) = 0;
4348 child_die = sibling_die (child_die);
4353 TYPE_NFIELDS (die->type) = num_fields;
4354 TYPE_FIELDS (die->type) = (struct field *)
4355 TYPE_ALLOC (die->type, sizeof (struct field) * num_fields);
4356 memcpy (TYPE_FIELDS (die->type), fields,
4357 sizeof (struct field) * num_fields);
4361 TYPE_FLAGS (die->type) |= TYPE_FLAG_UNSIGNED;
4364 new_symbol (die, die->type, cu);
4367 /* Extract all information from a DW_TAG_array_type DIE and put it in
4368 the DIE's type field. For now, this only handles one dimensional
4372 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
4374 struct objfile *objfile = cu->objfile;
4375 struct die_info *child_die;
4376 struct type *type = NULL;
4377 struct type *element_type, *range_type, *index_type;
4378 struct type **range_types = NULL;
4379 struct attribute *attr;
4381 struct cleanup *back_to;
4384 /* Return if we've already decoded this type. */
4390 element_type = die_type (die, cu);
4392 /* Irix 6.2 native cc creates array types without children for
4393 arrays with unspecified length. */
4394 if (die->child == NULL)
4396 index_type = builtin_type_int32;
4397 range_type = create_range_type (NULL, index_type, 0, -1);
4398 set_die_type (die, create_array_type (NULL, element_type, range_type),
4403 back_to = make_cleanup (null_cleanup, NULL);
4404 child_die = die->child;
4405 while (child_die && child_die->tag)
4407 if (child_die->tag == DW_TAG_subrange_type)
4409 read_subrange_type (child_die, cu);
4411 if (child_die->type != NULL)
4413 /* The range type was succesfully read. Save it for
4414 the array type creation. */
4415 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
4417 range_types = (struct type **)
4418 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
4419 * sizeof (struct type *));
4421 make_cleanup (free_current_contents, &range_types);
4423 range_types[ndim++] = child_die->type;
4426 child_die = sibling_die (child_die);
4429 /* Dwarf2 dimensions are output from left to right, create the
4430 necessary array types in backwards order. */
4432 type = element_type;
4434 if (read_array_order (die, cu) == DW_ORD_col_major)
4438 type = create_array_type (NULL, type, range_types[i++]);
4443 type = create_array_type (NULL, type, range_types[ndim]);
4446 /* Understand Dwarf2 support for vector types (like they occur on
4447 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4448 array type. This is not part of the Dwarf2/3 standard yet, but a
4449 custom vendor extension. The main difference between a regular
4450 array and the vector variant is that vectors are passed by value
4452 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
4454 make_vector_type (type);
4456 name = dwarf2_name (die, cu);
4458 TYPE_NAME (type) = name;
4460 do_cleanups (back_to);
4462 /* Install the type in the die. */
4463 set_die_type (die, type, cu);
4466 static enum dwarf_array_dim_ordering
4467 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
4469 struct attribute *attr;
4471 attr = dwarf2_attr (die, DW_AT_ordering, cu);
4473 if (attr) return DW_SND (attr);
4476 GNU F77 is a special case, as at 08/2004 array type info is the
4477 opposite order to the dwarf2 specification, but data is still
4478 laid out as per normal fortran.
4480 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4484 if (cu->language == language_fortran &&
4485 cu->producer && strstr (cu->producer, "GNU F77"))
4487 return DW_ORD_row_major;
4490 switch (cu->language_defn->la_array_ordering)
4492 case array_column_major:
4493 return DW_ORD_col_major;
4494 case array_row_major:
4496 return DW_ORD_row_major;
4500 /* Extract all information from a DW_TAG_set_type DIE and put it in
4501 the DIE's type field. */
4504 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
4506 if (die->type == NULL)
4507 die->type = create_set_type ((struct type *) NULL, die_type (die, cu));
4510 /* First cut: install each common block member as a global variable. */
4513 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
4515 struct die_info *child_die;
4516 struct attribute *attr;
4518 CORE_ADDR base = (CORE_ADDR) 0;
4520 attr = dwarf2_attr (die, DW_AT_location, cu);
4523 /* Support the .debug_loc offsets */
4524 if (attr_form_is_block (attr))
4526 base = decode_locdesc (DW_BLOCK (attr), cu);
4528 else if (attr_form_is_section_offset (attr))
4530 dwarf2_complex_location_expr_complaint ();
4534 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4535 "common block member");
4538 if (die->child != NULL)
4540 child_die = die->child;
4541 while (child_die && child_die->tag)
4543 sym = new_symbol (child_die, NULL, cu);
4544 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
4547 SYMBOL_VALUE_ADDRESS (sym) =
4548 base + decode_locdesc (DW_BLOCK (attr), cu);
4549 add_symbol_to_list (sym, &global_symbols);
4551 child_die = sibling_die (child_die);
4556 /* Read a C++ namespace. */
4559 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
4561 struct objfile *objfile = cu->objfile;
4562 const char *previous_prefix = processing_current_prefix;
4565 struct die_info *current_die;
4566 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4568 name = namespace_name (die, &is_anonymous, cu);
4570 /* Now build the name of the current namespace. */
4572 if (previous_prefix[0] == '\0')
4574 processing_current_prefix = name;
4578 char *temp_name = typename_concat (NULL, previous_prefix, name, cu);
4579 make_cleanup (xfree, temp_name);
4580 processing_current_prefix = temp_name;
4583 /* Add a symbol associated to this if we haven't seen the namespace
4584 before. Also, add a using directive if it's an anonymous
4587 if (dwarf2_extension (die, cu) == NULL)
4591 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4592 this cast will hopefully become unnecessary. */
4593 type = init_type (TYPE_CODE_NAMESPACE, 0, 0,
4594 (char *) processing_current_prefix,
4596 TYPE_TAG_NAME (type) = TYPE_NAME (type);
4598 new_symbol (die, type, cu);
4599 set_die_type (die, type, cu);
4602 cp_add_using_directive (processing_current_prefix,
4603 strlen (previous_prefix),
4604 strlen (processing_current_prefix));
4607 if (die->child != NULL)
4609 struct die_info *child_die = die->child;
4611 while (child_die && child_die->tag)
4613 process_die (child_die, cu);
4614 child_die = sibling_die (child_die);
4618 processing_current_prefix = previous_prefix;
4619 do_cleanups (back_to);
4622 /* Return the name of the namespace represented by DIE. Set
4623 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4627 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
4629 struct die_info *current_die;
4630 const char *name = NULL;
4632 /* Loop through the extensions until we find a name. */
4634 for (current_die = die;
4635 current_die != NULL;
4636 current_die = dwarf2_extension (die, cu))
4638 name = dwarf2_name (current_die, cu);
4643 /* Is it an anonymous namespace? */
4645 *is_anonymous = (name == NULL);
4647 name = "(anonymous namespace)";
4652 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4653 the user defined type vector. */
4656 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
4658 struct comp_unit_head *cu_header = &cu->header;
4660 struct attribute *attr_byte_size;
4661 struct attribute *attr_address_class;
4662 int byte_size, addr_class;
4669 type = lookup_pointer_type (die_type (die, cu));
4671 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
4673 byte_size = DW_UNSND (attr_byte_size);
4675 byte_size = cu_header->addr_size;
4677 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
4678 if (attr_address_class)
4679 addr_class = DW_UNSND (attr_address_class);
4681 addr_class = DW_ADDR_none;
4683 /* If the pointer size or address class is different than the
4684 default, create a type variant marked as such and set the
4685 length accordingly. */
4686 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
4688 if (gdbarch_address_class_type_flags_p (current_gdbarch))
4692 type_flags = gdbarch_address_class_type_flags
4693 (current_gdbarch, byte_size, addr_class);
4694 gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0);
4695 type = make_type_with_address_space (type, type_flags);
4697 else if (TYPE_LENGTH (type) != byte_size)
4699 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
4702 /* Should we also complain about unhandled address classes? */
4706 TYPE_LENGTH (type) = byte_size;
4707 set_die_type (die, type, cu);
4710 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4711 the user defined type vector. */
4714 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
4716 struct objfile *objfile = cu->objfile;
4718 struct type *to_type;
4719 struct type *domain;
4726 to_type = die_type (die, cu);
4727 domain = die_containing_type (die, cu);
4729 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
4730 type = lookup_methodptr_type (to_type);
4732 type = lookup_memberptr_type (to_type, domain);
4734 set_die_type (die, type, cu);
4737 /* Extract all information from a DW_TAG_reference_type DIE and add to
4738 the user defined type vector. */
4741 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
4743 struct comp_unit_head *cu_header = &cu->header;
4745 struct attribute *attr;
4752 type = lookup_reference_type (die_type (die, cu));
4753 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4756 TYPE_LENGTH (type) = DW_UNSND (attr);
4760 TYPE_LENGTH (type) = cu_header->addr_size;
4762 set_die_type (die, type, cu);
4766 read_tag_const_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 (1, TYPE_VOLATILE (base_type), base_type, 0),
4781 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
4783 struct type *base_type;
4790 base_type = die_type (die, cu);
4791 set_die_type (die, make_cv_type (TYPE_CONST (base_type), 1, base_type, 0),
4795 /* Extract all information from a DW_TAG_string_type DIE and add to
4796 the user defined type vector. It isn't really a user defined type,
4797 but it behaves like one, with other DIE's using an AT_user_def_type
4798 attribute to reference it. */
4801 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
4803 struct objfile *objfile = cu->objfile;
4804 struct type *type, *range_type, *index_type, *char_type;
4805 struct attribute *attr;
4806 unsigned int length;
4813 attr = dwarf2_attr (die, DW_AT_string_length, cu);
4816 length = DW_UNSND (attr);
4820 /* check for the DW_AT_byte_size attribute */
4821 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4824 length = DW_UNSND (attr);
4832 index_type = builtin_type_int32;
4833 range_type = create_range_type (NULL, index_type, 1, length);
4834 type = create_string_type (NULL, range_type);
4836 set_die_type (die, type, cu);
4839 /* Handle DIES due to C code like:
4843 int (*funcp)(int a, long l);
4847 ('funcp' generates a DW_TAG_subroutine_type DIE)
4851 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
4853 struct type *type; /* Type that this function returns */
4854 struct type *ftype; /* Function that returns above type */
4855 struct attribute *attr;
4857 /* Decode the type that this subroutine returns */
4862 type = die_type (die, cu);
4863 ftype = make_function_type (type, (struct type **) 0);
4865 /* All functions in C++, Pascal and Java have prototypes. */
4866 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
4867 if ((attr && (DW_UNSND (attr) != 0))
4868 || cu->language == language_cplus
4869 || cu->language == language_java
4870 || cu->language == language_pascal)
4871 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
4873 if (die->child != NULL)
4875 struct die_info *child_die;
4879 /* Count the number of parameters.
4880 FIXME: GDB currently ignores vararg functions, but knows about
4881 vararg member functions. */
4882 child_die = die->child;
4883 while (child_die && child_die->tag)
4885 if (child_die->tag == DW_TAG_formal_parameter)
4887 else if (child_die->tag == DW_TAG_unspecified_parameters)
4888 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
4889 child_die = sibling_die (child_die);
4892 /* Allocate storage for parameters and fill them in. */
4893 TYPE_NFIELDS (ftype) = nparams;
4894 TYPE_FIELDS (ftype) = (struct field *)
4895 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
4897 child_die = die->child;
4898 while (child_die && child_die->tag)
4900 if (child_die->tag == DW_TAG_formal_parameter)
4902 /* Dwarf2 has no clean way to discern C++ static and non-static
4903 member functions. G++ helps GDB by marking the first
4904 parameter for non-static member functions (which is the
4905 this pointer) as artificial. We pass this information
4906 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4907 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
4909 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
4911 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
4912 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
4915 child_die = sibling_die (child_die);
4919 set_die_type (die, ftype, cu);
4923 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
4925 struct objfile *objfile = cu->objfile;
4926 struct attribute *attr;
4931 name = dwarf2_name (die, cu);
4932 set_die_type (die, init_type (TYPE_CODE_TYPEDEF, 0,
4933 TYPE_FLAG_TARGET_STUB, name, objfile),
4935 TYPE_TARGET_TYPE (die->type) = die_type (die, cu);
4939 /* Find a representation of a given base type and install
4940 it in the TYPE field of the die. */
4943 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
4945 struct objfile *objfile = cu->objfile;
4947 struct attribute *attr;
4948 int encoding = 0, size = 0;
4950 enum type_code code = TYPE_CODE_INT;
4952 struct type *target_type = NULL;
4954 /* If we've already decoded this die, this is a no-op. */
4960 attr = dwarf2_attr (die, DW_AT_encoding, cu);
4963 encoding = DW_UNSND (attr);
4965 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4968 size = DW_UNSND (attr);
4970 name = dwarf2_name (die, cu);
4973 complaint (&symfile_complaints,
4974 _("DW_AT_name missing from DW_TAG_base_type"));
4979 case DW_ATE_address:
4980 /* Turn DW_ATE_address into a void * pointer. */
4981 code = TYPE_CODE_PTR;
4982 type_flags |= TYPE_FLAG_UNSIGNED;
4983 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4985 case DW_ATE_boolean:
4986 code = TYPE_CODE_BOOL;
4987 type_flags |= TYPE_FLAG_UNSIGNED;
4989 case DW_ATE_complex_float:
4990 code = TYPE_CODE_COMPLEX;
4991 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
4993 case DW_ATE_decimal_float:
4994 code = TYPE_CODE_DECFLOAT;
4997 code = TYPE_CODE_FLT;
5001 case DW_ATE_unsigned:
5002 type_flags |= TYPE_FLAG_UNSIGNED;
5004 case DW_ATE_signed_char:
5005 if (cu->language == language_m2)
5006 code = TYPE_CODE_CHAR;
5008 case DW_ATE_unsigned_char:
5009 if (cu->language == language_m2)
5010 code = TYPE_CODE_CHAR;
5011 type_flags |= TYPE_FLAG_UNSIGNED;
5014 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
5015 dwarf_type_encoding_name (encoding));
5019 type = init_type (code, size, type_flags, name, objfile);
5020 TYPE_TARGET_TYPE (type) = target_type;
5022 set_die_type (die, type, cu);
5025 /* Read the given DW_AT_subrange DIE. */
5028 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
5030 struct type *base_type;
5031 struct type *range_type;
5032 struct attribute *attr;
5037 /* If we have already decoded this die, then nothing more to do. */
5041 base_type = die_type (die, cu);
5042 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
5044 complaint (&symfile_complaints,
5045 _("DW_AT_type missing from DW_TAG_subrange_type"));
5047 = init_type (TYPE_CODE_INT, gdbarch_addr_bit (current_gdbarch) / 8,
5048 0, NULL, cu->objfile);
5051 if (cu->language == language_fortran)
5053 /* FORTRAN implies a lower bound of 1, if not given. */
5057 /* FIXME: For variable sized arrays either of these could be
5058 a variable rather than a constant value. We'll allow it,
5059 but we don't know how to handle it. */
5060 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
5062 low = dwarf2_get_attr_constant_value (attr, 0);
5064 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
5067 if (attr->form == DW_FORM_block1)
5069 /* GCC encodes arrays with unspecified or dynamic length
5070 with a DW_FORM_block1 attribute.
5071 FIXME: GDB does not yet know how to handle dynamic
5072 arrays properly, treat them as arrays with unspecified
5075 FIXME: jimb/2003-09-22: GDB does not really know
5076 how to handle arrays of unspecified length
5077 either; we just represent them as zero-length
5078 arrays. Choose an appropriate upper bound given
5079 the lower bound we've computed above. */
5083 high = dwarf2_get_attr_constant_value (attr, 1);
5086 range_type = create_range_type (NULL, base_type, low, high);
5088 name = dwarf2_name (die, cu);
5090 TYPE_NAME (range_type) = name;
5092 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5094 TYPE_LENGTH (range_type) = DW_UNSND (attr);
5096 set_die_type (die, range_type, cu);
5100 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
5107 /* For now, we only support the C meaning of an unspecified type: void. */
5109 type = init_type (TYPE_CODE_VOID, 0, 0, dwarf2_name (die, cu),
5112 set_die_type (die, type, cu);
5115 /* Read a whole compilation unit into a linked list of dies. */
5117 static struct die_info *
5118 read_comp_unit (gdb_byte *info_ptr, bfd *abfd, struct dwarf2_cu *cu)
5120 return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL);
5123 /* Read a single die and all its descendents. Set the die's sibling
5124 field to NULL; set other fields in the die correctly, and set all
5125 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5126 location of the info_ptr after reading all of those dies. PARENT
5127 is the parent of the die in question. */
5129 static struct die_info *
5130 read_die_and_children (gdb_byte *info_ptr, bfd *abfd,
5131 struct dwarf2_cu *cu,
5132 gdb_byte **new_info_ptr,
5133 struct die_info *parent)
5135 struct die_info *die;
5139 cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children);
5140 store_in_ref_table (die->offset, die, cu);
5144 die->child = read_die_and_siblings (cur_ptr, abfd, cu,
5150 *new_info_ptr = cur_ptr;
5153 die->sibling = NULL;
5154 die->parent = parent;
5158 /* Read a die, all of its descendents, and all of its siblings; set
5159 all of the fields of all of the dies correctly. Arguments are as
5160 in read_die_and_children. */
5162 static struct die_info *
5163 read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd,
5164 struct dwarf2_cu *cu,
5165 gdb_byte **new_info_ptr,
5166 struct die_info *parent)
5168 struct die_info *first_die, *last_sibling;
5172 first_die = last_sibling = NULL;
5176 struct die_info *die
5177 = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent);
5185 last_sibling->sibling = die;
5190 *new_info_ptr = cur_ptr;
5200 /* Free a linked list of dies. */
5203 free_die_list (struct die_info *dies)
5205 struct die_info *die, *next;
5210 if (die->child != NULL)
5211 free_die_list (die->child);
5212 next = die->sibling;
5219 /* Read the contents of the section at OFFSET and of size SIZE from the
5220 object file specified by OBJFILE into the objfile_obstack and return it. */
5223 dwarf2_read_section (struct objfile *objfile, asection *sectp)
5225 bfd *abfd = objfile->obfd;
5226 gdb_byte *buf, *retbuf;
5227 bfd_size_type size = bfd_get_section_size (sectp);
5232 buf = obstack_alloc (&objfile->objfile_obstack, size);
5233 retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
5237 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
5238 || bfd_bread (buf, size, abfd) != size)
5239 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5240 bfd_get_filename (abfd));
5245 /* In DWARF version 2, the description of the debugging information is
5246 stored in a separate .debug_abbrev section. Before we read any
5247 dies from a section we read in all abbreviations and install them
5248 in a hash table. This function also sets flags in CU describing
5249 the data found in the abbrev table. */
5252 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
5254 struct comp_unit_head *cu_header = &cu->header;
5255 gdb_byte *abbrev_ptr;
5256 struct abbrev_info *cur_abbrev;
5257 unsigned int abbrev_number, bytes_read, abbrev_name;
5258 unsigned int abbrev_form, hash_number;
5259 struct attr_abbrev *cur_attrs;
5260 unsigned int allocated_attrs;
5262 /* Initialize dwarf2 abbrevs */
5263 obstack_init (&cu->abbrev_obstack);
5264 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
5266 * sizeof (struct abbrev_info *)));
5267 memset (cu->dwarf2_abbrevs, 0,
5268 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
5270 abbrev_ptr = dwarf2_per_objfile->abbrev_buffer + cu_header->abbrev_offset;
5271 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5272 abbrev_ptr += bytes_read;
5274 allocated_attrs = ATTR_ALLOC_CHUNK;
5275 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
5277 /* loop until we reach an abbrev number of 0 */
5278 while (abbrev_number)
5280 cur_abbrev = dwarf_alloc_abbrev (cu);
5282 /* read in abbrev header */
5283 cur_abbrev->number = abbrev_number;
5284 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5285 abbrev_ptr += bytes_read;
5286 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
5289 if (cur_abbrev->tag == DW_TAG_namespace)
5290 cu->has_namespace_info = 1;
5292 /* now read in declarations */
5293 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5294 abbrev_ptr += bytes_read;
5295 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5296 abbrev_ptr += bytes_read;
5299 if (cur_abbrev->num_attrs == allocated_attrs)
5301 allocated_attrs += ATTR_ALLOC_CHUNK;
5303 = xrealloc (cur_attrs, (allocated_attrs
5304 * sizeof (struct attr_abbrev)));
5307 /* Record whether this compilation unit might have
5308 inter-compilation-unit references. If we don't know what form
5309 this attribute will have, then it might potentially be a
5310 DW_FORM_ref_addr, so we conservatively expect inter-CU
5313 if (abbrev_form == DW_FORM_ref_addr
5314 || abbrev_form == DW_FORM_indirect)
5315 cu->has_form_ref_addr = 1;
5317 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
5318 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
5319 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5320 abbrev_ptr += bytes_read;
5321 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5322 abbrev_ptr += bytes_read;
5325 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
5326 (cur_abbrev->num_attrs
5327 * sizeof (struct attr_abbrev)));
5328 memcpy (cur_abbrev->attrs, cur_attrs,
5329 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
5331 hash_number = abbrev_number % ABBREV_HASH_SIZE;
5332 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
5333 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
5335 /* Get next abbreviation.
5336 Under Irix6 the abbreviations for a compilation unit are not
5337 always properly terminated with an abbrev number of 0.
5338 Exit loop if we encounter an abbreviation which we have
5339 already read (which means we are about to read the abbreviations
5340 for the next compile unit) or if the end of the abbreviation
5341 table is reached. */
5342 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev_buffer)
5343 >= dwarf2_per_objfile->abbrev_size)
5345 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5346 abbrev_ptr += bytes_read;
5347 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
5354 /* Release the memory used by the abbrev table for a compilation unit. */
5357 dwarf2_free_abbrev_table (void *ptr_to_cu)
5359 struct dwarf2_cu *cu = ptr_to_cu;
5361 obstack_free (&cu->abbrev_obstack, NULL);
5362 cu->dwarf2_abbrevs = NULL;
5365 /* Lookup an abbrev_info structure in the abbrev hash table. */
5367 static struct abbrev_info *
5368 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
5370 unsigned int hash_number;
5371 struct abbrev_info *abbrev;
5373 hash_number = number % ABBREV_HASH_SIZE;
5374 abbrev = cu->dwarf2_abbrevs[hash_number];
5378 if (abbrev->number == number)
5381 abbrev = abbrev->next;
5386 /* Returns nonzero if TAG represents a type that we might generate a partial
5390 is_type_tag_for_partial (int tag)
5395 /* Some types that would be reasonable to generate partial symbols for,
5396 that we don't at present. */
5397 case DW_TAG_array_type:
5398 case DW_TAG_file_type:
5399 case DW_TAG_ptr_to_member_type:
5400 case DW_TAG_set_type:
5401 case DW_TAG_string_type:
5402 case DW_TAG_subroutine_type:
5404 case DW_TAG_base_type:
5405 case DW_TAG_class_type:
5406 case DW_TAG_enumeration_type:
5407 case DW_TAG_structure_type:
5408 case DW_TAG_subrange_type:
5409 case DW_TAG_typedef:
5410 case DW_TAG_union_type:
5417 /* Load all DIEs that are interesting for partial symbols into memory. */
5419 static struct partial_die_info *
5420 load_partial_dies (bfd *abfd, gdb_byte *info_ptr, int building_psymtab,
5421 struct dwarf2_cu *cu)
5423 struct partial_die_info *part_die;
5424 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
5425 struct abbrev_info *abbrev;
5426 unsigned int bytes_read;
5427 unsigned int load_all = 0;
5429 int nesting_level = 1;
5434 if (cu->per_cu && cu->per_cu->load_all_dies)
5438 = htab_create_alloc_ex (cu->header.length / 12,
5442 &cu->comp_unit_obstack,
5443 hashtab_obstack_allocate,
5444 dummy_obstack_deallocate);
5446 part_die = obstack_alloc (&cu->comp_unit_obstack,
5447 sizeof (struct partial_die_info));
5451 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
5453 /* A NULL abbrev means the end of a series of children. */
5456 if (--nesting_level == 0)
5458 /* PART_DIE was probably the last thing allocated on the
5459 comp_unit_obstack, so we could call obstack_free
5460 here. We don't do that because the waste is small,
5461 and will be cleaned up when we're done with this
5462 compilation unit. This way, we're also more robust
5463 against other users of the comp_unit_obstack. */
5466 info_ptr += bytes_read;
5467 last_die = parent_die;
5468 parent_die = parent_die->die_parent;
5472 /* Check whether this DIE is interesting enough to save. Normally
5473 we would not be interested in members here, but there may be
5474 later variables referencing them via DW_AT_specification (for
5477 && !is_type_tag_for_partial (abbrev->tag)
5478 && abbrev->tag != DW_TAG_enumerator
5479 && abbrev->tag != DW_TAG_subprogram
5480 && abbrev->tag != DW_TAG_variable
5481 && abbrev->tag != DW_TAG_namespace
5482 && abbrev->tag != DW_TAG_member)
5484 /* Otherwise we skip to the next sibling, if any. */
5485 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
5489 info_ptr = read_partial_die (part_die, abbrev, bytes_read,
5490 abfd, info_ptr, cu);
5492 /* This two-pass algorithm for processing partial symbols has a
5493 high cost in cache pressure. Thus, handle some simple cases
5494 here which cover the majority of C partial symbols. DIEs
5495 which neither have specification tags in them, nor could have
5496 specification tags elsewhere pointing at them, can simply be
5497 processed and discarded.
5499 This segment is also optional; scan_partial_symbols and
5500 add_partial_symbol will handle these DIEs if we chain
5501 them in normally. When compilers which do not emit large
5502 quantities of duplicate debug information are more common,
5503 this code can probably be removed. */
5505 /* Any complete simple types at the top level (pretty much all
5506 of them, for a language without namespaces), can be processed
5508 if (parent_die == NULL
5509 && part_die->has_specification == 0
5510 && part_die->is_declaration == 0
5511 && (part_die->tag == DW_TAG_typedef
5512 || part_die->tag == DW_TAG_base_type
5513 || part_die->tag == DW_TAG_subrange_type))
5515 if (building_psymtab && part_die->name != NULL)
5516 add_psymbol_to_list (part_die->name, strlen (part_die->name),
5517 VAR_DOMAIN, LOC_TYPEDEF,
5518 &cu->objfile->static_psymbols,
5519 0, (CORE_ADDR) 0, cu->language, cu->objfile);
5520 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
5524 /* If we're at the second level, and we're an enumerator, and
5525 our parent has no specification (meaning possibly lives in a
5526 namespace elsewhere), then we can add the partial symbol now
5527 instead of queueing it. */
5528 if (part_die->tag == DW_TAG_enumerator
5529 && parent_die != NULL
5530 && parent_die->die_parent == NULL
5531 && parent_die->tag == DW_TAG_enumeration_type
5532 && parent_die->has_specification == 0)
5534 if (part_die->name == NULL)
5535 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
5536 else if (building_psymtab)
5537 add_psymbol_to_list (part_die->name, strlen (part_die->name),
5538 VAR_DOMAIN, LOC_CONST,
5539 (cu->language == language_cplus
5540 || cu->language == language_java)
5541 ? &cu->objfile->global_psymbols
5542 : &cu->objfile->static_psymbols,
5543 0, (CORE_ADDR) 0, cu->language, cu->objfile);
5545 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
5549 /* We'll save this DIE so link it in. */
5550 part_die->die_parent = parent_die;
5551 part_die->die_sibling = NULL;
5552 part_die->die_child = NULL;
5554 if (last_die && last_die == parent_die)
5555 last_die->die_child = part_die;
5557 last_die->die_sibling = part_die;
5559 last_die = part_die;
5561 if (first_die == NULL)
5562 first_die = part_die;
5564 /* Maybe add the DIE to the hash table. Not all DIEs that we
5565 find interesting need to be in the hash table, because we
5566 also have the parent/sibling/child chains; only those that we
5567 might refer to by offset later during partial symbol reading.
5569 For now this means things that might have be the target of a
5570 DW_AT_specification, DW_AT_abstract_origin, or
5571 DW_AT_extension. DW_AT_extension will refer only to
5572 namespaces; DW_AT_abstract_origin refers to functions (and
5573 many things under the function DIE, but we do not recurse
5574 into function DIEs during partial symbol reading) and
5575 possibly variables as well; DW_AT_specification refers to
5576 declarations. Declarations ought to have the DW_AT_declaration
5577 flag. It happens that GCC forgets to put it in sometimes, but
5578 only for functions, not for types.
5580 Adding more things than necessary to the hash table is harmless
5581 except for the performance cost. Adding too few will result in
5582 wasted time in find_partial_die, when we reread the compilation
5583 unit with load_all_dies set. */
5586 || abbrev->tag == DW_TAG_subprogram
5587 || abbrev->tag == DW_TAG_variable
5588 || abbrev->tag == DW_TAG_namespace
5589 || part_die->is_declaration)
5593 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
5594 part_die->offset, INSERT);
5598 part_die = obstack_alloc (&cu->comp_unit_obstack,
5599 sizeof (struct partial_die_info));
5601 /* For some DIEs we want to follow their children (if any). For C
5602 we have no reason to follow the children of structures; for other
5603 languages we have to, both so that we can get at method physnames
5604 to infer fully qualified class names, and for DW_AT_specification. */
5605 if (last_die->has_children
5607 || last_die->tag == DW_TAG_namespace
5608 || last_die->tag == DW_TAG_enumeration_type
5609 || (cu->language != language_c
5610 && (last_die->tag == DW_TAG_class_type
5611 || last_die->tag == DW_TAG_structure_type
5612 || last_die->tag == DW_TAG_union_type))))
5615 parent_die = last_die;
5619 /* Otherwise we skip to the next sibling, if any. */
5620 info_ptr = locate_pdi_sibling (last_die, info_ptr, abfd, cu);
5622 /* Back to the top, do it again. */
5626 /* Read a minimal amount of information into the minimal die structure. */
5629 read_partial_die (struct partial_die_info *part_die,
5630 struct abbrev_info *abbrev,
5631 unsigned int abbrev_len, bfd *abfd,
5632 gdb_byte *info_ptr, struct dwarf2_cu *cu)
5634 unsigned int bytes_read, i;
5635 struct attribute attr;
5636 int has_low_pc_attr = 0;
5637 int has_high_pc_attr = 0;
5639 memset (part_die, 0, sizeof (struct partial_die_info));
5641 part_die->offset = info_ptr - dwarf2_per_objfile->info_buffer;
5643 info_ptr += abbrev_len;
5648 part_die->tag = abbrev->tag;
5649 part_die->has_children = abbrev->has_children;
5651 for (i = 0; i < abbrev->num_attrs; ++i)
5653 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
5655 /* Store the data if it is of an attribute we want to keep in a
5656 partial symbol table. */
5661 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5662 if (part_die->name == NULL)
5663 part_die->name = DW_STRING (&attr);
5665 case DW_AT_comp_dir:
5666 if (part_die->dirname == NULL)
5667 part_die->dirname = DW_STRING (&attr);
5669 case DW_AT_MIPS_linkage_name:
5670 part_die->name = DW_STRING (&attr);
5673 has_low_pc_attr = 1;
5674 part_die->lowpc = DW_ADDR (&attr);
5677 has_high_pc_attr = 1;
5678 part_die->highpc = DW_ADDR (&attr);
5681 if (dwarf2_ranges_read (DW_UNSND (&attr), &part_die->lowpc,
5682 &part_die->highpc, cu))
5683 has_low_pc_attr = has_high_pc_attr = 1;
5685 case DW_AT_location:
5686 /* Support the .debug_loc offsets */
5687 if (attr_form_is_block (&attr))
5689 part_die->locdesc = DW_BLOCK (&attr);
5691 else if (attr_form_is_section_offset (&attr))
5693 dwarf2_complex_location_expr_complaint ();
5697 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5698 "partial symbol information");
5701 case DW_AT_language:
5702 part_die->language = DW_UNSND (&attr);
5704 case DW_AT_external:
5705 part_die->is_external = DW_UNSND (&attr);
5707 case DW_AT_declaration:
5708 part_die->is_declaration = DW_UNSND (&attr);
5711 part_die->has_type = 1;
5713 case DW_AT_abstract_origin:
5714 case DW_AT_specification:
5715 case DW_AT_extension:
5716 part_die->has_specification = 1;
5717 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr, cu);
5720 /* Ignore absolute siblings, they might point outside of
5721 the current compile unit. */
5722 if (attr.form == DW_FORM_ref_addr)
5723 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
5725 part_die->sibling = dwarf2_per_objfile->info_buffer
5726 + dwarf2_get_ref_die_offset (&attr, cu);
5728 case DW_AT_stmt_list:
5729 part_die->has_stmt_list = 1;
5730 part_die->line_offset = DW_UNSND (&attr);
5732 case DW_AT_byte_size:
5733 part_die->has_byte_size = 1;
5735 case DW_AT_calling_convention:
5736 /* DWARF doesn't provide a way to identify a program's source-level
5737 entry point. DW_AT_calling_convention attributes are only meant
5738 to describe functions' calling conventions.
5740 However, because it's a necessary piece of information in
5741 Fortran, and because DW_CC_program is the only piece of debugging
5742 information whose definition refers to a 'main program' at all,
5743 several compilers have begun marking Fortran main programs with
5744 DW_CC_program --- even when those functions use the standard
5745 calling conventions.
5747 So until DWARF specifies a way to provide this information and
5748 compilers pick up the new representation, we'll support this
5750 if (DW_UNSND (&attr) == DW_CC_program
5751 && cu->language == language_fortran)
5752 set_main_name (part_die->name);
5759 /* When using the GNU linker, .gnu.linkonce. sections are used to
5760 eliminate duplicate copies of functions and vtables and such.
5761 The linker will arbitrarily choose one and discard the others.
5762 The AT_*_pc values for such functions refer to local labels in
5763 these sections. If the section from that file was discarded, the
5764 labels are not in the output, so the relocs get a value of 0.
5765 If this is a discarded function, mark the pc bounds as invalid,
5766 so that GDB will ignore it. */
5767 if (has_low_pc_attr && has_high_pc_attr
5768 && part_die->lowpc < part_die->highpc
5769 && (part_die->lowpc != 0
5770 || dwarf2_per_objfile->has_section_at_zero))
5771 part_die->has_pc_info = 1;
5775 /* Find a cached partial DIE at OFFSET in CU. */
5777 static struct partial_die_info *
5778 find_partial_die_in_comp_unit (unsigned long offset, struct dwarf2_cu *cu)
5780 struct partial_die_info *lookup_die = NULL;
5781 struct partial_die_info part_die;
5783 part_die.offset = offset;
5784 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
5789 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5791 static struct partial_die_info *
5792 find_partial_die (unsigned long offset, struct dwarf2_cu *cu)
5794 struct dwarf2_per_cu_data *per_cu = NULL;
5795 struct partial_die_info *pd = NULL;
5797 if (offset >= cu->header.offset
5798 && offset < cu->header.offset + cu->header.length)
5800 pd = find_partial_die_in_comp_unit (offset, cu);
5805 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
5807 if (per_cu->cu == NULL)
5809 load_comp_unit (per_cu, cu->objfile);
5810 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
5811 dwarf2_per_objfile->read_in_chain = per_cu;
5814 per_cu->cu->last_used = 0;
5815 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
5817 if (pd == NULL && per_cu->load_all_dies == 0)
5819 struct cleanup *back_to;
5820 struct partial_die_info comp_unit_die;
5821 struct abbrev_info *abbrev;
5822 unsigned int bytes_read;
5825 per_cu->load_all_dies = 1;
5827 /* Re-read the DIEs. */
5828 back_to = make_cleanup (null_cleanup, 0);
5829 if (per_cu->cu->dwarf2_abbrevs == NULL)
5831 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
5832 back_to = make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
5834 info_ptr = per_cu->cu->header.first_die_ptr;
5835 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
5836 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
5837 per_cu->cu->objfile->obfd, info_ptr,
5839 if (comp_unit_die.has_children)
5840 load_partial_dies (per_cu->cu->objfile->obfd, info_ptr, 0, per_cu->cu);
5841 do_cleanups (back_to);
5843 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
5847 internal_error (__FILE__, __LINE__,
5848 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5849 offset, bfd_get_filename (cu->objfile->obfd));
5853 /* Adjust PART_DIE before generating a symbol for it. This function
5854 may set the is_external flag or change the DIE's name. */
5857 fixup_partial_die (struct partial_die_info *part_die,
5858 struct dwarf2_cu *cu)
5860 /* If we found a reference attribute and the DIE has no name, try
5861 to find a name in the referred to DIE. */
5863 if (part_die->name == NULL && part_die->has_specification)
5865 struct partial_die_info *spec_die;
5867 spec_die = find_partial_die (part_die->spec_offset, cu);
5869 fixup_partial_die (spec_die, cu);
5873 part_die->name = spec_die->name;
5875 /* Copy DW_AT_external attribute if it is set. */
5876 if (spec_die->is_external)
5877 part_die->is_external = spec_die->is_external;
5881 /* Set default names for some unnamed DIEs. */
5882 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
5883 || part_die->tag == DW_TAG_class_type))
5884 part_die->name = "(anonymous class)";
5886 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
5887 part_die->name = "(anonymous namespace)";
5889 if (part_die->tag == DW_TAG_structure_type
5890 || part_die->tag == DW_TAG_class_type
5891 || part_die->tag == DW_TAG_union_type)
5892 guess_structure_name (part_die, cu);
5895 /* Read the die from the .debug_info section buffer. Set DIEP to
5896 point to a newly allocated die with its information, except for its
5897 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5898 whether the die has children or not. */
5901 read_full_die (struct die_info **diep, bfd *abfd, gdb_byte *info_ptr,
5902 struct dwarf2_cu *cu, int *has_children)
5904 unsigned int abbrev_number, bytes_read, i, offset;
5905 struct abbrev_info *abbrev;
5906 struct die_info *die;
5908 offset = info_ptr - dwarf2_per_objfile->info_buffer;
5909 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5910 info_ptr += bytes_read;
5913 die = dwarf_alloc_die ();
5915 die->abbrev = abbrev_number;
5922 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
5925 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5927 bfd_get_filename (abfd));
5929 die = dwarf_alloc_die ();
5930 die->offset = offset;
5931 die->tag = abbrev->tag;
5932 die->abbrev = abbrev_number;
5935 die->num_attrs = abbrev->num_attrs;
5936 die->attrs = (struct attribute *)
5937 xmalloc (die->num_attrs * sizeof (struct attribute));
5939 for (i = 0; i < abbrev->num_attrs; ++i)
5941 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
5942 abfd, info_ptr, cu);
5944 /* If this attribute is an absolute reference to a different
5945 compilation unit, make sure that compilation unit is loaded
5947 if (die->attrs[i].form == DW_FORM_ref_addr
5948 && (DW_ADDR (&die->attrs[i]) < cu->header.offset
5949 || (DW_ADDR (&die->attrs[i])
5950 >= cu->header.offset + cu->header.length)))
5952 struct dwarf2_per_cu_data *per_cu;
5953 per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (&die->attrs[i]),
5956 /* Mark the dependence relation so that we don't flush PER_CU
5958 dwarf2_add_dependence (cu, per_cu);
5960 /* If it's already on the queue, we have nothing to do. */
5964 /* If the compilation unit is already loaded, just mark it as
5966 if (per_cu->cu != NULL)
5968 per_cu->cu->last_used = 0;
5972 /* Add it to the queue. */
5973 queue_comp_unit (per_cu);
5978 *has_children = abbrev->has_children;
5982 /* Read an attribute value described by an attribute form. */
5985 read_attribute_value (struct attribute *attr, unsigned form,
5986 bfd *abfd, gdb_byte *info_ptr,
5987 struct dwarf2_cu *cu)
5989 struct comp_unit_head *cu_header = &cu->header;
5990 unsigned int bytes_read;
5991 struct dwarf_block *blk;
5997 case DW_FORM_ref_addr:
5998 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
5999 info_ptr += bytes_read;
6001 case DW_FORM_block2:
6002 blk = dwarf_alloc_block (cu);
6003 blk->size = read_2_bytes (abfd, info_ptr);
6005 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6006 info_ptr += blk->size;
6007 DW_BLOCK (attr) = blk;
6009 case DW_FORM_block4:
6010 blk = dwarf_alloc_block (cu);
6011 blk->size = read_4_bytes (abfd, info_ptr);
6013 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6014 info_ptr += blk->size;
6015 DW_BLOCK (attr) = blk;
6018 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
6022 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
6026 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
6029 case DW_FORM_string:
6030 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
6031 info_ptr += bytes_read;
6034 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
6036 info_ptr += bytes_read;
6039 blk = dwarf_alloc_block (cu);
6040 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6041 info_ptr += bytes_read;
6042 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6043 info_ptr += blk->size;
6044 DW_BLOCK (attr) = blk;
6046 case DW_FORM_block1:
6047 blk = dwarf_alloc_block (cu);
6048 blk->size = read_1_byte (abfd, info_ptr);
6050 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6051 info_ptr += blk->size;
6052 DW_BLOCK (attr) = blk;
6055 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
6059 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
6063 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
6064 info_ptr += bytes_read;
6067 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6068 info_ptr += bytes_read;
6071 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
6075 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
6079 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
6083 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
6086 case DW_FORM_ref_udata:
6087 DW_ADDR (attr) = (cu->header.offset
6088 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
6089 info_ptr += bytes_read;
6091 case DW_FORM_indirect:
6092 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6093 info_ptr += bytes_read;
6094 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
6097 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6098 dwarf_form_name (form),
6099 bfd_get_filename (abfd));
6104 /* Read an attribute described by an abbreviated attribute. */
6107 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
6108 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
6110 attr->name = abbrev->name;
6111 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
6114 /* read dwarf information from a buffer */
6117 read_1_byte (bfd *abfd, gdb_byte *buf)
6119 return bfd_get_8 (abfd, buf);
6123 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
6125 return bfd_get_signed_8 (abfd, buf);
6129 read_2_bytes (bfd *abfd, gdb_byte *buf)
6131 return bfd_get_16 (abfd, buf);
6135 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
6137 return bfd_get_signed_16 (abfd, buf);
6141 read_4_bytes (bfd *abfd, gdb_byte *buf)
6143 return bfd_get_32 (abfd, buf);
6147 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
6149 return bfd_get_signed_32 (abfd, buf);
6152 static unsigned long
6153 read_8_bytes (bfd *abfd, gdb_byte *buf)
6155 return bfd_get_64 (abfd, buf);
6159 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
6160 unsigned int *bytes_read)
6162 struct comp_unit_head *cu_header = &cu->header;
6163 CORE_ADDR retval = 0;
6165 if (cu_header->signed_addr_p)
6167 switch (cu_header->addr_size)
6170 retval = bfd_get_signed_16 (abfd, buf);
6173 retval = bfd_get_signed_32 (abfd, buf);
6176 retval = bfd_get_signed_64 (abfd, buf);
6179 internal_error (__FILE__, __LINE__,
6180 _("read_address: bad switch, signed [in module %s]"),
6181 bfd_get_filename (abfd));
6186 switch (cu_header->addr_size)
6189 retval = bfd_get_16 (abfd, buf);
6192 retval = bfd_get_32 (abfd, buf);
6195 retval = bfd_get_64 (abfd, buf);
6198 internal_error (__FILE__, __LINE__,
6199 _("read_address: bad switch, unsigned [in module %s]"),
6200 bfd_get_filename (abfd));
6204 *bytes_read = cu_header->addr_size;
6208 /* Read the initial length from a section. The (draft) DWARF 3
6209 specification allows the initial length to take up either 4 bytes
6210 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6211 bytes describe the length and all offsets will be 8 bytes in length
6214 An older, non-standard 64-bit format is also handled by this
6215 function. The older format in question stores the initial length
6216 as an 8-byte quantity without an escape value. Lengths greater
6217 than 2^32 aren't very common which means that the initial 4 bytes
6218 is almost always zero. Since a length value of zero doesn't make
6219 sense for the 32-bit format, this initial zero can be considered to
6220 be an escape value which indicates the presence of the older 64-bit
6221 format. As written, the code can't detect (old format) lengths
6222 greater than 4GB. If it becomes necessary to handle lengths
6223 somewhat larger than 4GB, we could allow other small values (such
6224 as the non-sensical values of 1, 2, and 3) to also be used as
6225 escape values indicating the presence of the old format.
6227 The value returned via bytes_read should be used to increment the
6228 relevant pointer after calling read_initial_length().
6230 As a side effect, this function sets the fields initial_length_size
6231 and offset_size in cu_header to the values appropriate for the
6232 length field. (The format of the initial length field determines
6233 the width of file offsets to be fetched later with read_offset().)
6235 [ Note: read_initial_length() and read_offset() are based on the
6236 document entitled "DWARF Debugging Information Format", revision
6237 3, draft 8, dated November 19, 2001. This document was obtained
6240 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6242 This document is only a draft and is subject to change. (So beware.)
6244 Details regarding the older, non-standard 64-bit format were
6245 determined empirically by examining 64-bit ELF files produced by
6246 the SGI toolchain on an IRIX 6.5 machine.
6248 - Kevin, July 16, 2002
6252 read_initial_length (bfd *abfd, gdb_byte *buf, struct comp_unit_head *cu_header,
6253 unsigned int *bytes_read)
6255 LONGEST length = bfd_get_32 (abfd, buf);
6257 if (length == 0xffffffff)
6259 length = bfd_get_64 (abfd, buf + 4);
6262 else if (length == 0)
6264 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6265 length = bfd_get_64 (abfd, buf);
6275 gdb_assert (cu_header->initial_length_size == 0
6276 || cu_header->initial_length_size == 4
6277 || cu_header->initial_length_size == 8
6278 || cu_header->initial_length_size == 12);
6280 if (cu_header->initial_length_size != 0
6281 && cu_header->initial_length_size != *bytes_read)
6282 complaint (&symfile_complaints,
6283 _("intermixed 32-bit and 64-bit DWARF sections"));
6285 cu_header->initial_length_size = *bytes_read;
6286 cu_header->offset_size = (*bytes_read == 4) ? 4 : 8;
6292 /* Read an offset from the data stream. The size of the offset is
6293 given by cu_header->offset_size. */
6296 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
6297 unsigned int *bytes_read)
6301 switch (cu_header->offset_size)
6304 retval = bfd_get_32 (abfd, buf);
6308 retval = bfd_get_64 (abfd, buf);
6312 internal_error (__FILE__, __LINE__,
6313 _("read_offset: bad switch [in module %s]"),
6314 bfd_get_filename (abfd));
6321 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
6323 /* If the size of a host char is 8 bits, we can return a pointer
6324 to the buffer, otherwise we have to copy the data to a buffer
6325 allocated on the temporary obstack. */
6326 gdb_assert (HOST_CHAR_BIT == 8);
6331 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6333 /* If the size of a host char is 8 bits, we can return a pointer
6334 to the string, otherwise we have to copy the string to a buffer
6335 allocated on the temporary obstack. */
6336 gdb_assert (HOST_CHAR_BIT == 8);
6339 *bytes_read_ptr = 1;
6342 *bytes_read_ptr = strlen ((char *) buf) + 1;
6343 return (char *) buf;
6347 read_indirect_string (bfd *abfd, gdb_byte *buf,
6348 const struct comp_unit_head *cu_header,
6349 unsigned int *bytes_read_ptr)
6351 LONGEST str_offset = read_offset (abfd, buf, cu_header,
6354 if (dwarf2_per_objfile->str_buffer == NULL)
6356 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6357 bfd_get_filename (abfd));
6360 if (str_offset >= dwarf2_per_objfile->str_size)
6362 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6363 bfd_get_filename (abfd));
6366 gdb_assert (HOST_CHAR_BIT == 8);
6367 if (dwarf2_per_objfile->str_buffer[str_offset] == '\0')
6369 return (char *) (dwarf2_per_objfile->str_buffer + str_offset);
6372 static unsigned long
6373 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6375 unsigned long result;
6376 unsigned int num_read;
6386 byte = bfd_get_8 (abfd, buf);
6389 result |= ((unsigned long)(byte & 127) << shift);
6390 if ((byte & 128) == 0)
6396 *bytes_read_ptr = num_read;
6401 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6404 int i, shift, num_read;
6413 byte = bfd_get_8 (abfd, buf);
6416 result |= ((long)(byte & 127) << shift);
6418 if ((byte & 128) == 0)
6423 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
6424 result |= -(((long)1) << shift);
6425 *bytes_read_ptr = num_read;
6429 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6432 skip_leb128 (bfd *abfd, gdb_byte *buf)
6438 byte = bfd_get_8 (abfd, buf);
6440 if ((byte & 128) == 0)
6446 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
6452 cu->language = language_c;
6454 case DW_LANG_C_plus_plus:
6455 cu->language = language_cplus;
6457 case DW_LANG_Fortran77:
6458 case DW_LANG_Fortran90:
6459 case DW_LANG_Fortran95:
6460 cu->language = language_fortran;
6462 case DW_LANG_Mips_Assembler:
6463 cu->language = language_asm;
6466 cu->language = language_java;
6470 cu->language = language_ada;
6472 case DW_LANG_Modula2:
6473 cu->language = language_m2;
6475 case DW_LANG_Pascal83:
6476 cu->language = language_pascal;
6478 case DW_LANG_Cobol74:
6479 case DW_LANG_Cobol85:
6481 cu->language = language_minimal;
6484 cu->language_defn = language_def (cu->language);
6487 /* Return the named attribute or NULL if not there. */
6489 static struct attribute *
6490 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
6493 struct attribute *spec = NULL;
6495 for (i = 0; i < die->num_attrs; ++i)
6497 if (die->attrs[i].name == name)
6498 return &die->attrs[i];
6499 if (die->attrs[i].name == DW_AT_specification
6500 || die->attrs[i].name == DW_AT_abstract_origin)
6501 spec = &die->attrs[i];
6505 return dwarf2_attr (follow_die_ref (die, spec, cu), name, cu);
6510 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6511 and holds a non-zero value. This function should only be used for
6512 DW_FORM_flag attributes. */
6515 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
6517 struct attribute *attr = dwarf2_attr (die, name, cu);
6519 return (attr && DW_UNSND (attr));
6523 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
6525 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6526 which value is non-zero. However, we have to be careful with
6527 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6528 (via dwarf2_flag_true_p) follows this attribute. So we may
6529 end up accidently finding a declaration attribute that belongs
6530 to a different DIE referenced by the specification attribute,
6531 even though the given DIE does not have a declaration attribute. */
6532 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
6533 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
6536 /* Return the die giving the specification for DIE, if there is
6539 static struct die_info *
6540 die_specification (struct die_info *die, struct dwarf2_cu *cu)
6542 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, cu);
6544 if (spec_attr == NULL)
6547 return follow_die_ref (die, spec_attr, cu);
6550 /* Free the line_header structure *LH, and any arrays and strings it
6553 free_line_header (struct line_header *lh)
6555 if (lh->standard_opcode_lengths)
6556 xfree (lh->standard_opcode_lengths);
6558 /* Remember that all the lh->file_names[i].name pointers are
6559 pointers into debug_line_buffer, and don't need to be freed. */
6561 xfree (lh->file_names);
6563 /* Similarly for the include directory names. */
6564 if (lh->include_dirs)
6565 xfree (lh->include_dirs);
6571 /* Add an entry to LH's include directory table. */
6573 add_include_dir (struct line_header *lh, char *include_dir)
6575 /* Grow the array if necessary. */
6576 if (lh->include_dirs_size == 0)
6578 lh->include_dirs_size = 1; /* for testing */
6579 lh->include_dirs = xmalloc (lh->include_dirs_size
6580 * sizeof (*lh->include_dirs));
6582 else if (lh->num_include_dirs >= lh->include_dirs_size)
6584 lh->include_dirs_size *= 2;
6585 lh->include_dirs = xrealloc (lh->include_dirs,
6586 (lh->include_dirs_size
6587 * sizeof (*lh->include_dirs)));
6590 lh->include_dirs[lh->num_include_dirs++] = include_dir;
6594 /* Add an entry to LH's file name table. */
6596 add_file_name (struct line_header *lh,
6598 unsigned int dir_index,
6599 unsigned int mod_time,
6600 unsigned int length)
6602 struct file_entry *fe;
6604 /* Grow the array if necessary. */
6605 if (lh->file_names_size == 0)
6607 lh->file_names_size = 1; /* for testing */
6608 lh->file_names = xmalloc (lh->file_names_size
6609 * sizeof (*lh->file_names));
6611 else if (lh->num_file_names >= lh->file_names_size)
6613 lh->file_names_size *= 2;
6614 lh->file_names = xrealloc (lh->file_names,
6615 (lh->file_names_size
6616 * sizeof (*lh->file_names)));
6619 fe = &lh->file_names[lh->num_file_names++];
6621 fe->dir_index = dir_index;
6622 fe->mod_time = mod_time;
6623 fe->length = length;
6629 /* Read the statement program header starting at OFFSET in
6630 .debug_line, according to the endianness of ABFD. Return a pointer
6631 to a struct line_header, allocated using xmalloc.
6633 NOTE: the strings in the include directory and file name tables of
6634 the returned object point into debug_line_buffer, and must not be
6636 static struct line_header *
6637 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
6638 struct dwarf2_cu *cu)
6640 struct cleanup *back_to;
6641 struct line_header *lh;
6643 unsigned int bytes_read;
6645 char *cur_dir, *cur_file;
6647 if (dwarf2_per_objfile->line_buffer == NULL)
6649 complaint (&symfile_complaints, _("missing .debug_line section"));
6653 /* Make sure that at least there's room for the total_length field.
6654 That could be 12 bytes long, but we're just going to fudge that. */
6655 if (offset + 4 >= dwarf2_per_objfile->line_size)
6657 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6661 lh = xmalloc (sizeof (*lh));
6662 memset (lh, 0, sizeof (*lh));
6663 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
6666 line_ptr = dwarf2_per_objfile->line_buffer + offset;
6668 /* Read in the header. */
6670 read_initial_length (abfd, line_ptr, &cu->header, &bytes_read);
6671 line_ptr += bytes_read;
6672 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line_buffer
6673 + dwarf2_per_objfile->line_size))
6675 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6678 lh->statement_program_end = line_ptr + lh->total_length;
6679 lh->version = read_2_bytes (abfd, line_ptr);
6681 lh->header_length = read_offset (abfd, line_ptr, &cu->header, &bytes_read);
6682 line_ptr += bytes_read;
6683 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
6685 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
6687 lh->line_base = read_1_signed_byte (abfd, line_ptr);
6689 lh->line_range = read_1_byte (abfd, line_ptr);
6691 lh->opcode_base = read_1_byte (abfd, line_ptr);
6693 lh->standard_opcode_lengths
6694 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
6696 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
6697 for (i = 1; i < lh->opcode_base; ++i)
6699 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
6703 /* Read directory table. */
6704 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
6706 line_ptr += bytes_read;
6707 add_include_dir (lh, cur_dir);
6709 line_ptr += bytes_read;
6711 /* Read file name table. */
6712 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
6714 unsigned int dir_index, mod_time, length;
6716 line_ptr += bytes_read;
6717 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6718 line_ptr += bytes_read;
6719 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6720 line_ptr += bytes_read;
6721 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6722 line_ptr += bytes_read;
6724 add_file_name (lh, cur_file, dir_index, mod_time, length);
6726 line_ptr += bytes_read;
6727 lh->statement_program_start = line_ptr;
6729 if (line_ptr > (dwarf2_per_objfile->line_buffer
6730 + dwarf2_per_objfile->line_size))
6731 complaint (&symfile_complaints,
6732 _("line number info header doesn't fit in `.debug_line' section"));
6734 discard_cleanups (back_to);
6738 /* This function exists to work around a bug in certain compilers
6739 (particularly GCC 2.95), in which the first line number marker of a
6740 function does not show up until after the prologue, right before
6741 the second line number marker. This function shifts ADDRESS down
6742 to the beginning of the function if necessary, and is called on
6743 addresses passed to record_line. */
6746 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
6748 struct function_range *fn;
6750 /* Find the function_range containing address. */
6755 cu->cached_fn = cu->first_fn;
6759 if (fn->lowpc <= address && fn->highpc > address)
6765 while (fn && fn != cu->cached_fn)
6766 if (fn->lowpc <= address && fn->highpc > address)
6776 if (address != fn->lowpc)
6777 complaint (&symfile_complaints,
6778 _("misplaced first line number at 0x%lx for '%s'"),
6779 (unsigned long) address, fn->name);
6784 /* Decode the Line Number Program (LNP) for the given line_header
6785 structure and CU. The actual information extracted and the type
6786 of structures created from the LNP depends on the value of PST.
6788 1. If PST is NULL, then this procedure uses the data from the program
6789 to create all necessary symbol tables, and their linetables.
6790 The compilation directory of the file is passed in COMP_DIR,
6791 and must not be NULL.
6793 2. If PST is not NULL, this procedure reads the program to determine
6794 the list of files included by the unit represented by PST, and
6795 builds all the associated partial symbol tables. In this case,
6796 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6797 is not used to compute the full name of the symtab, and therefore
6798 omitting it when building the partial symtab does not introduce
6799 the potential for inconsistency - a partial symtab and its associated
6800 symbtab having a different fullname -). */
6803 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
6804 struct dwarf2_cu *cu, struct partial_symtab *pst)
6806 gdb_byte *line_ptr, *extended_end;
6808 unsigned int bytes_read, extended_len;
6809 unsigned char op_code, extended_op, adj_opcode;
6811 struct objfile *objfile = cu->objfile;
6812 const int decode_for_pst_p = (pst != NULL);
6813 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
6815 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6817 line_ptr = lh->statement_program_start;
6818 line_end = lh->statement_program_end;
6820 /* Read the statement sequences until there's nothing left. */
6821 while (line_ptr < line_end)
6823 /* state machine registers */
6824 CORE_ADDR address = 0;
6825 unsigned int file = 1;
6826 unsigned int line = 1;
6827 unsigned int column = 0;
6828 int is_stmt = lh->default_is_stmt;
6829 int basic_block = 0;
6830 int end_sequence = 0;
6832 if (!decode_for_pst_p && lh->num_file_names >= file)
6834 /* Start a subfile for the current file of the state machine. */
6835 /* lh->include_dirs and lh->file_names are 0-based, but the
6836 directory and file name numbers in the statement program
6838 struct file_entry *fe = &lh->file_names[file - 1];
6842 dir = lh->include_dirs[fe->dir_index - 1];
6844 dwarf2_start_subfile (fe->name, dir, comp_dir);
6847 /* Decode the table. */
6848 while (!end_sequence)
6850 op_code = read_1_byte (abfd, line_ptr);
6853 if (op_code >= lh->opcode_base)
6855 /* Special operand. */
6856 adj_opcode = op_code - lh->opcode_base;
6857 address += (adj_opcode / lh->line_range)
6858 * lh->minimum_instruction_length;
6859 line += lh->line_base + (adj_opcode % lh->line_range);
6860 if (lh->num_file_names < file)
6861 dwarf2_debug_line_missing_file_complaint ();
6864 lh->file_names[file - 1].included_p = 1;
6865 if (!decode_for_pst_p)
6867 if (last_subfile != current_subfile)
6870 record_line (last_subfile, 0, address);
6871 last_subfile = current_subfile;
6873 /* Append row to matrix using current values. */
6874 record_line (current_subfile, line,
6875 check_cu_functions (address, cu));
6880 else switch (op_code)
6882 case DW_LNS_extended_op:
6883 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6884 line_ptr += bytes_read;
6885 extended_end = line_ptr + extended_len;
6886 extended_op = read_1_byte (abfd, line_ptr);
6888 switch (extended_op)
6890 case DW_LNE_end_sequence:
6893 if (lh->num_file_names < file)
6894 dwarf2_debug_line_missing_file_complaint ();
6897 lh->file_names[file - 1].included_p = 1;
6898 if (!decode_for_pst_p)
6899 record_line (current_subfile, 0, address);
6902 case DW_LNE_set_address:
6903 address = read_address (abfd, line_ptr, cu, &bytes_read);
6904 line_ptr += bytes_read;
6905 address += baseaddr;
6907 case DW_LNE_define_file:
6910 unsigned int dir_index, mod_time, length;
6912 cur_file = read_string (abfd, line_ptr, &bytes_read);
6913 line_ptr += bytes_read;
6915 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6916 line_ptr += bytes_read;
6918 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6919 line_ptr += bytes_read;
6921 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6922 line_ptr += bytes_read;
6923 add_file_name (lh, cur_file, dir_index, mod_time, length);
6927 complaint (&symfile_complaints,
6928 _("mangled .debug_line section"));
6931 /* Make sure that we parsed the extended op correctly. If e.g.
6932 we expected a different address size than the producer used,
6933 we may have read the wrong number of bytes. */
6934 if (line_ptr != extended_end)
6936 complaint (&symfile_complaints,
6937 _("mangled .debug_line section"));
6942 if (lh->num_file_names < file)
6943 dwarf2_debug_line_missing_file_complaint ();
6946 lh->file_names[file - 1].included_p = 1;
6947 if (!decode_for_pst_p)
6949 if (last_subfile != current_subfile)
6952 record_line (last_subfile, 0, address);
6953 last_subfile = current_subfile;
6955 record_line (current_subfile, line,
6956 check_cu_functions (address, cu));
6961 case DW_LNS_advance_pc:
6962 address += lh->minimum_instruction_length
6963 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6964 line_ptr += bytes_read;
6966 case DW_LNS_advance_line:
6967 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
6968 line_ptr += bytes_read;
6970 case DW_LNS_set_file:
6972 /* The arrays lh->include_dirs and lh->file_names are
6973 0-based, but the directory and file name numbers in
6974 the statement program are 1-based. */
6975 struct file_entry *fe;
6978 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6979 line_ptr += bytes_read;
6980 if (lh->num_file_names < file)
6981 dwarf2_debug_line_missing_file_complaint ();
6984 fe = &lh->file_names[file - 1];
6986 dir = lh->include_dirs[fe->dir_index - 1];
6987 if (!decode_for_pst_p)
6989 last_subfile = current_subfile;
6990 dwarf2_start_subfile (fe->name, dir, comp_dir);
6995 case DW_LNS_set_column:
6996 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6997 line_ptr += bytes_read;
6999 case DW_LNS_negate_stmt:
7000 is_stmt = (!is_stmt);
7002 case DW_LNS_set_basic_block:
7005 /* Add to the address register of the state machine the
7006 address increment value corresponding to special opcode
7007 255. I.e., this value is scaled by the minimum
7008 instruction length since special opcode 255 would have
7009 scaled the the increment. */
7010 case DW_LNS_const_add_pc:
7011 address += (lh->minimum_instruction_length
7012 * ((255 - lh->opcode_base) / lh->line_range));
7014 case DW_LNS_fixed_advance_pc:
7015 address += read_2_bytes (abfd, line_ptr);
7020 /* Unknown standard opcode, ignore it. */
7023 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
7025 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7026 line_ptr += bytes_read;
7033 if (decode_for_pst_p)
7037 /* Now that we're done scanning the Line Header Program, we can
7038 create the psymtab of each included file. */
7039 for (file_index = 0; file_index < lh->num_file_names; file_index++)
7040 if (lh->file_names[file_index].included_p == 1)
7042 const struct file_entry fe = lh->file_names [file_index];
7043 char *include_name = fe.name;
7044 char *dir_name = NULL;
7045 char *pst_filename = pst->filename;
7048 dir_name = lh->include_dirs[fe.dir_index - 1];
7050 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
7052 include_name = concat (dir_name, SLASH_STRING,
7053 include_name, (char *)NULL);
7054 make_cleanup (xfree, include_name);
7057 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
7059 pst_filename = concat (pst->dirname, SLASH_STRING,
7060 pst_filename, (char *)NULL);
7061 make_cleanup (xfree, pst_filename);
7064 if (strcmp (include_name, pst_filename) != 0)
7065 dwarf2_create_include_psymtab (include_name, pst, objfile);
7070 /* Make sure a symtab is created for every file, even files
7071 which contain only variables (i.e. no code with associated
7075 struct file_entry *fe;
7077 for (i = 0; i < lh->num_file_names; i++)
7080 fe = &lh->file_names[i];
7082 dir = lh->include_dirs[fe->dir_index - 1];
7083 dwarf2_start_subfile (fe->name, dir, comp_dir);
7085 /* Skip the main file; we don't need it, and it must be
7086 allocated last, so that it will show up before the
7087 non-primary symtabs in the objfile's symtab list. */
7088 if (current_subfile == first_subfile)
7091 if (current_subfile->symtab == NULL)
7092 current_subfile->symtab = allocate_symtab (current_subfile->name,
7094 fe->symtab = current_subfile->symtab;
7099 /* Start a subfile for DWARF. FILENAME is the name of the file and
7100 DIRNAME the name of the source directory which contains FILENAME
7101 or NULL if not known. COMP_DIR is the compilation directory for the
7102 linetable's compilation unit or NULL if not known.
7103 This routine tries to keep line numbers from identical absolute and
7104 relative file names in a common subfile.
7106 Using the `list' example from the GDB testsuite, which resides in
7107 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7108 of /srcdir/list0.c yields the following debugging information for list0.c:
7110 DW_AT_name: /srcdir/list0.c
7111 DW_AT_comp_dir: /compdir
7112 files.files[0].name: list0.h
7113 files.files[0].dir: /srcdir
7114 files.files[1].name: list0.c
7115 files.files[1].dir: /srcdir
7117 The line number information for list0.c has to end up in a single
7118 subfile, so that `break /srcdir/list0.c:1' works as expected.
7119 start_subfile will ensure that this happens provided that we pass the
7120 concatenation of files.files[1].dir and files.files[1].name as the
7124 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
7128 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7129 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7130 second argument to start_subfile. To be consistent, we do the
7131 same here. In order not to lose the line information directory,
7132 we concatenate it to the filename when it makes sense.
7133 Note that the Dwarf3 standard says (speaking of filenames in line
7134 information): ``The directory index is ignored for file names
7135 that represent full path names''. Thus ignoring dirname in the
7136 `else' branch below isn't an issue. */
7138 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
7139 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
7141 fullname = filename;
7143 start_subfile (fullname, comp_dir);
7145 if (fullname != filename)
7150 var_decode_location (struct attribute *attr, struct symbol *sym,
7151 struct dwarf2_cu *cu)
7153 struct objfile *objfile = cu->objfile;
7154 struct comp_unit_head *cu_header = &cu->header;
7156 /* NOTE drow/2003-01-30: There used to be a comment and some special
7157 code here to turn a symbol with DW_AT_external and a
7158 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7159 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7160 with some versions of binutils) where shared libraries could have
7161 relocations against symbols in their debug information - the
7162 minimal symbol would have the right address, but the debug info
7163 would not. It's no longer necessary, because we will explicitly
7164 apply relocations when we read in the debug information now. */
7166 /* A DW_AT_location attribute with no contents indicates that a
7167 variable has been optimized away. */
7168 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
7170 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
7174 /* Handle one degenerate form of location expression specially, to
7175 preserve GDB's previous behavior when section offsets are
7176 specified. If this is just a DW_OP_addr then mark this symbol
7179 if (attr_form_is_block (attr)
7180 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
7181 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
7185 SYMBOL_VALUE_ADDRESS (sym) =
7186 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
7187 fixup_symbol_section (sym, objfile);
7188 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
7189 SYMBOL_SECTION (sym));
7190 SYMBOL_CLASS (sym) = LOC_STATIC;
7194 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7195 expression evaluator, and use LOC_COMPUTED only when necessary
7196 (i.e. when the value of a register or memory location is
7197 referenced, or a thread-local block, etc.). Then again, it might
7198 not be worthwhile. I'm assuming that it isn't unless performance
7199 or memory numbers show me otherwise. */
7201 dwarf2_symbol_mark_computed (attr, sym, cu);
7202 SYMBOL_CLASS (sym) = LOC_COMPUTED;
7205 /* Given a pointer to a DWARF information entry, figure out if we need
7206 to make a symbol table entry for it, and if so, create a new entry
7207 and return a pointer to it.
7208 If TYPE is NULL, determine symbol type from the die, otherwise
7209 used the passed type. */
7211 static struct symbol *
7212 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
7214 struct objfile *objfile = cu->objfile;
7215 struct symbol *sym = NULL;
7217 struct attribute *attr = NULL;
7218 struct attribute *attr2 = NULL;
7221 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7223 if (die->tag != DW_TAG_namespace)
7224 name = dwarf2_linkage_name (die, cu);
7226 name = TYPE_NAME (type);
7230 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
7231 sizeof (struct symbol));
7232 OBJSTAT (objfile, n_syms++);
7233 memset (sym, 0, sizeof (struct symbol));
7235 /* Cache this symbol's name and the name's demangled form (if any). */
7236 SYMBOL_LANGUAGE (sym) = cu->language;
7237 SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
7239 /* Default assumptions.
7240 Use the passed type or decode it from the die. */
7241 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7242 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
7244 SYMBOL_TYPE (sym) = type;
7246 SYMBOL_TYPE (sym) = die_type (die, cu);
7247 attr = dwarf2_attr (die, DW_AT_decl_line, cu);
7250 SYMBOL_LINE (sym) = DW_UNSND (attr);
7253 attr = dwarf2_attr (die, DW_AT_decl_file, cu);
7256 int file_index = DW_UNSND (attr);
7257 if (cu->line_header == NULL
7258 || file_index > cu->line_header->num_file_names)
7259 complaint (&symfile_complaints,
7260 _("file index out of range"));
7261 else if (file_index > 0)
7263 struct file_entry *fe;
7264 fe = &cu->line_header->file_names[file_index - 1];
7265 SYMBOL_SYMTAB (sym) = fe->symtab;
7272 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
7275 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
7277 SYMBOL_CLASS (sym) = LOC_LABEL;
7279 case DW_TAG_subprogram:
7280 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7282 SYMBOL_CLASS (sym) = LOC_BLOCK;
7283 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7284 if (attr2 && (DW_UNSND (attr2) != 0))
7286 add_symbol_to_list (sym, &global_symbols);
7290 add_symbol_to_list (sym, cu->list_in_scope);
7293 case DW_TAG_variable:
7294 /* Compilation with minimal debug info may result in variables
7295 with missing type entries. Change the misleading `void' type
7296 to something sensible. */
7297 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
7299 = builtin_type (current_gdbarch)->nodebug_data_symbol;
7301 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7304 dwarf2_const_value (attr, sym, cu);
7305 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7306 if (attr2 && (DW_UNSND (attr2) != 0))
7307 add_symbol_to_list (sym, &global_symbols);
7309 add_symbol_to_list (sym, cu->list_in_scope);
7312 attr = dwarf2_attr (die, DW_AT_location, cu);
7315 var_decode_location (attr, sym, cu);
7316 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7317 if (attr2 && (DW_UNSND (attr2) != 0))
7318 add_symbol_to_list (sym, &global_symbols);
7320 add_symbol_to_list (sym, cu->list_in_scope);
7324 /* We do not know the address of this symbol.
7325 If it is an external symbol and we have type information
7326 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7327 The address of the variable will then be determined from
7328 the minimal symbol table whenever the variable is
7330 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7331 if (attr2 && (DW_UNSND (attr2) != 0)
7332 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
7334 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
7335 add_symbol_to_list (sym, &global_symbols);
7339 case DW_TAG_formal_parameter:
7340 attr = dwarf2_attr (die, DW_AT_location, cu);
7343 var_decode_location (attr, sym, cu);
7344 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7345 if (SYMBOL_CLASS (sym) == LOC_COMPUTED)
7346 SYMBOL_CLASS (sym) = LOC_COMPUTED_ARG;
7348 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7351 dwarf2_const_value (attr, sym, cu);
7353 add_symbol_to_list (sym, cu->list_in_scope);
7355 case DW_TAG_unspecified_parameters:
7356 /* From varargs functions; gdb doesn't seem to have any
7357 interest in this information, so just ignore it for now.
7360 case DW_TAG_class_type:
7361 case DW_TAG_structure_type:
7362 case DW_TAG_union_type:
7363 case DW_TAG_set_type:
7364 case DW_TAG_enumeration_type:
7365 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7366 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
7368 /* Make sure that the symbol includes appropriate enclosing
7369 classes/namespaces in its name. These are calculated in
7370 read_structure_type, and the correct name is saved in
7373 if (cu->language == language_cplus
7374 || cu->language == language_java)
7376 struct type *type = SYMBOL_TYPE (sym);
7378 if (TYPE_TAG_NAME (type) != NULL)
7380 /* FIXME: carlton/2003-11-10: Should this use
7381 SYMBOL_SET_NAMES instead? (The same problem also
7382 arises further down in this function.) */
7383 /* The type's name is already allocated along with
7384 this objfile, so we don't need to duplicate it
7386 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
7391 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7392 really ever be static objects: otherwise, if you try
7393 to, say, break of a class's method and you're in a file
7394 which doesn't mention that class, it won't work unless
7395 the check for all static symbols in lookup_symbol_aux
7396 saves you. See the OtherFileClass tests in
7397 gdb.c++/namespace.exp. */
7399 struct pending **list_to_add;
7401 list_to_add = (cu->list_in_scope == &file_symbols
7402 && (cu->language == language_cplus
7403 || cu->language == language_java)
7404 ? &global_symbols : cu->list_in_scope);
7406 add_symbol_to_list (sym, list_to_add);
7408 /* The semantics of C++ state that "struct foo { ... }" also
7409 defines a typedef for "foo". A Java class declaration also
7410 defines a typedef for the class. Synthesize a typedef symbol
7411 so that "ptype foo" works as expected. */
7412 if (cu->language == language_cplus
7413 || cu->language == language_java
7414 || cu->language == language_ada)
7416 struct symbol *typedef_sym = (struct symbol *)
7417 obstack_alloc (&objfile->objfile_obstack,
7418 sizeof (struct symbol));
7419 *typedef_sym = *sym;
7420 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
7421 /* The symbol's name is already allocated along with
7422 this objfile, so we don't need to duplicate it for
7424 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
7425 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
7426 add_symbol_to_list (typedef_sym, list_to_add);
7430 case DW_TAG_typedef:
7431 if (processing_has_namespace_info
7432 && processing_current_prefix[0] != '\0')
7434 SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
7435 processing_current_prefix,
7438 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7439 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7440 add_symbol_to_list (sym, cu->list_in_scope);
7442 case DW_TAG_base_type:
7443 case DW_TAG_subrange_type:
7444 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7445 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7446 add_symbol_to_list (sym, cu->list_in_scope);
7448 case DW_TAG_enumerator:
7449 if (processing_has_namespace_info
7450 && processing_current_prefix[0] != '\0')
7452 SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
7453 processing_current_prefix,
7456 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7459 dwarf2_const_value (attr, sym, cu);
7462 /* NOTE: carlton/2003-11-10: See comment above in the
7463 DW_TAG_class_type, etc. block. */
7465 struct pending **list_to_add;
7467 list_to_add = (cu->list_in_scope == &file_symbols
7468 && (cu->language == language_cplus
7469 || cu->language == language_java)
7470 ? &global_symbols : cu->list_in_scope);
7472 add_symbol_to_list (sym, list_to_add);
7475 case DW_TAG_namespace:
7476 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7477 add_symbol_to_list (sym, &global_symbols);
7480 /* Not a tag we recognize. Hopefully we aren't processing
7481 trash data, but since we must specifically ignore things
7482 we don't recognize, there is nothing else we should do at
7484 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
7485 dwarf_tag_name (die->tag));
7492 /* Copy constant value from an attribute to a symbol. */
7495 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
7496 struct dwarf2_cu *cu)
7498 struct objfile *objfile = cu->objfile;
7499 struct comp_unit_head *cu_header = &cu->header;
7500 struct dwarf_block *blk;
7505 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
7506 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
7507 cu_header->addr_size,
7508 TYPE_LENGTH (SYMBOL_TYPE
7510 SYMBOL_VALUE_BYTES (sym) =
7511 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
7512 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7513 it's body - store_unsigned_integer. */
7514 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
7516 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
7518 case DW_FORM_block1:
7519 case DW_FORM_block2:
7520 case DW_FORM_block4:
7522 blk = DW_BLOCK (attr);
7523 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
7524 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
7526 TYPE_LENGTH (SYMBOL_TYPE
7528 SYMBOL_VALUE_BYTES (sym) =
7529 obstack_alloc (&objfile->objfile_obstack, blk->size);
7530 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
7531 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
7534 /* The DW_AT_const_value attributes are supposed to carry the
7535 symbol's value "represented as it would be on the target
7536 architecture." By the time we get here, it's already been
7537 converted to host endianness, so we just need to sign- or
7538 zero-extend it as appropriate. */
7540 dwarf2_const_value_data (attr, sym, 8);
7543 dwarf2_const_value_data (attr, sym, 16);
7546 dwarf2_const_value_data (attr, sym, 32);
7549 dwarf2_const_value_data (attr, sym, 64);
7553 SYMBOL_VALUE (sym) = DW_SND (attr);
7554 SYMBOL_CLASS (sym) = LOC_CONST;
7558 SYMBOL_VALUE (sym) = DW_UNSND (attr);
7559 SYMBOL_CLASS (sym) = LOC_CONST;
7563 complaint (&symfile_complaints,
7564 _("unsupported const value attribute form: '%s'"),
7565 dwarf_form_name (attr->form));
7566 SYMBOL_VALUE (sym) = 0;
7567 SYMBOL_CLASS (sym) = LOC_CONST;
7573 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7574 or zero-extend it as appropriate for the symbol's type. */
7576 dwarf2_const_value_data (struct attribute *attr,
7580 LONGEST l = DW_UNSND (attr);
7582 if (bits < sizeof (l) * 8)
7584 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
7585 l &= ((LONGEST) 1 << bits) - 1;
7587 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
7590 SYMBOL_VALUE (sym) = l;
7591 SYMBOL_CLASS (sym) = LOC_CONST;
7595 /* Return the type of the die in question using its DW_AT_type attribute. */
7597 static struct type *
7598 die_type (struct die_info *die, struct dwarf2_cu *cu)
7601 struct attribute *type_attr;
7602 struct die_info *type_die;
7604 type_attr = dwarf2_attr (die, DW_AT_type, cu);
7607 /* A missing DW_AT_type represents a void type. */
7608 return builtin_type (current_gdbarch)->builtin_void;
7611 type_die = follow_die_ref (die, type_attr, cu);
7613 type = tag_type_to_type (type_die, cu);
7616 dump_die (type_die);
7617 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7623 /* Return the containing type of the die in question using its
7624 DW_AT_containing_type attribute. */
7626 static struct type *
7627 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
7629 struct type *type = NULL;
7630 struct attribute *type_attr;
7631 struct die_info *type_die = NULL;
7633 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
7636 type_die = follow_die_ref (die, type_attr, cu);
7637 type = tag_type_to_type (type_die, cu);
7642 dump_die (type_die);
7643 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7649 static struct type *
7650 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
7658 read_type_die (die, cu);
7662 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7670 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
7672 char *prefix = determine_prefix (die, cu);
7673 const char *old_prefix = processing_current_prefix;
7674 struct cleanup *back_to = make_cleanup (xfree, prefix);
7675 processing_current_prefix = prefix;
7679 case DW_TAG_class_type:
7680 case DW_TAG_structure_type:
7681 case DW_TAG_union_type:
7682 read_structure_type (die, cu);
7684 case DW_TAG_enumeration_type:
7685 read_enumeration_type (die, cu);
7687 case DW_TAG_subprogram:
7688 case DW_TAG_subroutine_type:
7689 read_subroutine_type (die, cu);
7691 case DW_TAG_array_type:
7692 read_array_type (die, cu);
7694 case DW_TAG_set_type:
7695 read_set_type (die, cu);
7697 case DW_TAG_pointer_type:
7698 read_tag_pointer_type (die, cu);
7700 case DW_TAG_ptr_to_member_type:
7701 read_tag_ptr_to_member_type (die, cu);
7703 case DW_TAG_reference_type:
7704 read_tag_reference_type (die, cu);
7706 case DW_TAG_const_type:
7707 read_tag_const_type (die, cu);
7709 case DW_TAG_volatile_type:
7710 read_tag_volatile_type (die, cu);
7712 case DW_TAG_string_type:
7713 read_tag_string_type (die, cu);
7715 case DW_TAG_typedef:
7716 read_typedef (die, cu);
7718 case DW_TAG_subrange_type:
7719 read_subrange_type (die, cu);
7721 case DW_TAG_base_type:
7722 read_base_type (die, cu);
7724 case DW_TAG_unspecified_type:
7725 read_unspecified_type (die, cu);
7728 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
7729 dwarf_tag_name (die->tag));
7733 processing_current_prefix = old_prefix;
7734 do_cleanups (back_to);
7737 /* Return the name of the namespace/class that DIE is defined within,
7738 or "" if we can't tell. The caller should xfree the result. */
7740 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7741 therein) for an example of how to use this function to deal with
7742 DW_AT_specification. */
7745 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
7747 struct die_info *parent;
7749 if (cu->language != language_cplus
7750 && cu->language != language_java)
7753 parent = die->parent;
7757 return xstrdup ("");
7761 switch (parent->tag) {
7762 case DW_TAG_namespace:
7764 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7765 before doing this check? */
7766 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
7768 return xstrdup (TYPE_TAG_NAME (parent->type));
7773 char *parent_prefix = determine_prefix (parent, cu);
7774 char *retval = typename_concat (NULL, parent_prefix,
7775 namespace_name (parent, &dummy,
7778 xfree (parent_prefix);
7783 case DW_TAG_class_type:
7784 case DW_TAG_structure_type:
7786 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
7788 return xstrdup (TYPE_TAG_NAME (parent->type));
7792 const char *old_prefix = processing_current_prefix;
7793 char *new_prefix = determine_prefix (parent, cu);
7796 processing_current_prefix = new_prefix;
7797 retval = determine_class_name (parent, cu);
7798 processing_current_prefix = old_prefix;
7805 return determine_prefix (parent, cu);
7810 /* Return a newly-allocated string formed by concatenating PREFIX and
7811 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7812 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7813 perform an obconcat, otherwise allocate storage for the result. The CU argument
7814 is used to determine the language and hence, the appropriate separator. */
7816 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7819 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
7820 struct dwarf2_cu *cu)
7824 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
7826 else if (cu->language == language_java)
7833 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
7838 strcpy (retval, prefix);
7839 strcat (retval, sep);
7842 strcat (retval, suffix);
7848 /* We have an obstack. */
7849 return obconcat (obs, prefix, sep, suffix);
7855 copy_die (struct die_info *old_die)
7857 struct die_info *new_die;
7860 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
7861 memset (new_die, 0, sizeof (struct die_info));
7863 new_die->tag = old_die->tag;
7864 new_die->has_children = old_die->has_children;
7865 new_die->abbrev = old_die->abbrev;
7866 new_die->offset = old_die->offset;
7867 new_die->type = NULL;
7869 num_attrs = old_die->num_attrs;
7870 new_die->num_attrs = num_attrs;
7871 new_die->attrs = (struct attribute *)
7872 xmalloc (num_attrs * sizeof (struct attribute));
7874 for (i = 0; i < old_die->num_attrs; ++i)
7876 new_die->attrs[i].name = old_die->attrs[i].name;
7877 new_die->attrs[i].form = old_die->attrs[i].form;
7878 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
7881 new_die->next = NULL;
7886 /* Return sibling of die, NULL if no sibling. */
7888 static struct die_info *
7889 sibling_die (struct die_info *die)
7891 return die->sibling;
7894 /* Get linkage name of a die, return NULL if not found. */
7897 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
7899 struct attribute *attr;
7901 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7902 if (attr && DW_STRING (attr))
7903 return DW_STRING (attr);
7904 attr = dwarf2_attr (die, DW_AT_name, cu);
7905 if (attr && DW_STRING (attr))
7906 return DW_STRING (attr);
7910 /* Get name of a die, return NULL if not found. */
7913 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
7915 struct attribute *attr;
7917 attr = dwarf2_attr (die, DW_AT_name, cu);
7918 if (attr && DW_STRING (attr))
7919 return DW_STRING (attr);
7923 /* Return the die that this die in an extension of, or NULL if there
7926 static struct die_info *
7927 dwarf2_extension (struct die_info *die, struct dwarf2_cu *cu)
7929 struct attribute *attr;
7931 attr = dwarf2_attr (die, DW_AT_extension, cu);
7935 return follow_die_ref (die, attr, cu);
7938 /* Convert a DIE tag into its string name. */
7941 dwarf_tag_name (unsigned tag)
7945 case DW_TAG_padding:
7946 return "DW_TAG_padding";
7947 case DW_TAG_array_type:
7948 return "DW_TAG_array_type";
7949 case DW_TAG_class_type:
7950 return "DW_TAG_class_type";
7951 case DW_TAG_entry_point:
7952 return "DW_TAG_entry_point";
7953 case DW_TAG_enumeration_type:
7954 return "DW_TAG_enumeration_type";
7955 case DW_TAG_formal_parameter:
7956 return "DW_TAG_formal_parameter";
7957 case DW_TAG_imported_declaration:
7958 return "DW_TAG_imported_declaration";
7960 return "DW_TAG_label";
7961 case DW_TAG_lexical_block:
7962 return "DW_TAG_lexical_block";
7964 return "DW_TAG_member";
7965 case DW_TAG_pointer_type:
7966 return "DW_TAG_pointer_type";
7967 case DW_TAG_reference_type:
7968 return "DW_TAG_reference_type";
7969 case DW_TAG_compile_unit:
7970 return "DW_TAG_compile_unit";
7971 case DW_TAG_string_type:
7972 return "DW_TAG_string_type";
7973 case DW_TAG_structure_type:
7974 return "DW_TAG_structure_type";
7975 case DW_TAG_subroutine_type:
7976 return "DW_TAG_subroutine_type";
7977 case DW_TAG_typedef:
7978 return "DW_TAG_typedef";
7979 case DW_TAG_union_type:
7980 return "DW_TAG_union_type";
7981 case DW_TAG_unspecified_parameters:
7982 return "DW_TAG_unspecified_parameters";
7983 case DW_TAG_variant:
7984 return "DW_TAG_variant";
7985 case DW_TAG_common_block:
7986 return "DW_TAG_common_block";
7987 case DW_TAG_common_inclusion:
7988 return "DW_TAG_common_inclusion";
7989 case DW_TAG_inheritance:
7990 return "DW_TAG_inheritance";
7991 case DW_TAG_inlined_subroutine:
7992 return "DW_TAG_inlined_subroutine";
7994 return "DW_TAG_module";
7995 case DW_TAG_ptr_to_member_type:
7996 return "DW_TAG_ptr_to_member_type";
7997 case DW_TAG_set_type:
7998 return "DW_TAG_set_type";
7999 case DW_TAG_subrange_type:
8000 return "DW_TAG_subrange_type";
8001 case DW_TAG_with_stmt:
8002 return "DW_TAG_with_stmt";
8003 case DW_TAG_access_declaration:
8004 return "DW_TAG_access_declaration";
8005 case DW_TAG_base_type:
8006 return "DW_TAG_base_type";
8007 case DW_TAG_catch_block:
8008 return "DW_TAG_catch_block";
8009 case DW_TAG_const_type:
8010 return "DW_TAG_const_type";
8011 case DW_TAG_constant:
8012 return "DW_TAG_constant";
8013 case DW_TAG_enumerator:
8014 return "DW_TAG_enumerator";
8015 case DW_TAG_file_type:
8016 return "DW_TAG_file_type";
8018 return "DW_TAG_friend";
8019 case DW_TAG_namelist:
8020 return "DW_TAG_namelist";
8021 case DW_TAG_namelist_item:
8022 return "DW_TAG_namelist_item";
8023 case DW_TAG_packed_type:
8024 return "DW_TAG_packed_type";
8025 case DW_TAG_subprogram:
8026 return "DW_TAG_subprogram";
8027 case DW_TAG_template_type_param:
8028 return "DW_TAG_template_type_param";
8029 case DW_TAG_template_value_param:
8030 return "DW_TAG_template_value_param";
8031 case DW_TAG_thrown_type:
8032 return "DW_TAG_thrown_type";
8033 case DW_TAG_try_block:
8034 return "DW_TAG_try_block";
8035 case DW_TAG_variant_part:
8036 return "DW_TAG_variant_part";
8037 case DW_TAG_variable:
8038 return "DW_TAG_variable";
8039 case DW_TAG_volatile_type:
8040 return "DW_TAG_volatile_type";
8041 case DW_TAG_dwarf_procedure:
8042 return "DW_TAG_dwarf_procedure";
8043 case DW_TAG_restrict_type:
8044 return "DW_TAG_restrict_type";
8045 case DW_TAG_interface_type:
8046 return "DW_TAG_interface_type";
8047 case DW_TAG_namespace:
8048 return "DW_TAG_namespace";
8049 case DW_TAG_imported_module:
8050 return "DW_TAG_imported_module";
8051 case DW_TAG_unspecified_type:
8052 return "DW_TAG_unspecified_type";
8053 case DW_TAG_partial_unit:
8054 return "DW_TAG_partial_unit";
8055 case DW_TAG_imported_unit:
8056 return "DW_TAG_imported_unit";
8057 case DW_TAG_condition:
8058 return "DW_TAG_condition";
8059 case DW_TAG_shared_type:
8060 return "DW_TAG_shared_type";
8061 case DW_TAG_MIPS_loop:
8062 return "DW_TAG_MIPS_loop";
8063 case DW_TAG_HP_array_descriptor:
8064 return "DW_TAG_HP_array_descriptor";
8065 case DW_TAG_format_label:
8066 return "DW_TAG_format_label";
8067 case DW_TAG_function_template:
8068 return "DW_TAG_function_template";
8069 case DW_TAG_class_template:
8070 return "DW_TAG_class_template";
8071 case DW_TAG_GNU_BINCL:
8072 return "DW_TAG_GNU_BINCL";
8073 case DW_TAG_GNU_EINCL:
8074 return "DW_TAG_GNU_EINCL";
8075 case DW_TAG_upc_shared_type:
8076 return "DW_TAG_upc_shared_type";
8077 case DW_TAG_upc_strict_type:
8078 return "DW_TAG_upc_strict_type";
8079 case DW_TAG_upc_relaxed_type:
8080 return "DW_TAG_upc_relaxed_type";
8081 case DW_TAG_PGI_kanji_type:
8082 return "DW_TAG_PGI_kanji_type";
8083 case DW_TAG_PGI_interface_block:
8084 return "DW_TAG_PGI_interface_block";
8086 return "DW_TAG_<unknown>";
8090 /* Convert a DWARF attribute code into its string name. */
8093 dwarf_attr_name (unsigned attr)
8098 return "DW_AT_sibling";
8099 case DW_AT_location:
8100 return "DW_AT_location";
8102 return "DW_AT_name";
8103 case DW_AT_ordering:
8104 return "DW_AT_ordering";
8105 case DW_AT_subscr_data:
8106 return "DW_AT_subscr_data";
8107 case DW_AT_byte_size:
8108 return "DW_AT_byte_size";
8109 case DW_AT_bit_offset:
8110 return "DW_AT_bit_offset";
8111 case DW_AT_bit_size:
8112 return "DW_AT_bit_size";
8113 case DW_AT_element_list:
8114 return "DW_AT_element_list";
8115 case DW_AT_stmt_list:
8116 return "DW_AT_stmt_list";
8118 return "DW_AT_low_pc";
8120 return "DW_AT_high_pc";
8121 case DW_AT_language:
8122 return "DW_AT_language";
8124 return "DW_AT_member";
8126 return "DW_AT_discr";
8127 case DW_AT_discr_value:
8128 return "DW_AT_discr_value";
8129 case DW_AT_visibility:
8130 return "DW_AT_visibility";
8132 return "DW_AT_import";
8133 case DW_AT_string_length:
8134 return "DW_AT_string_length";
8135 case DW_AT_common_reference:
8136 return "DW_AT_common_reference";
8137 case DW_AT_comp_dir:
8138 return "DW_AT_comp_dir";
8139 case DW_AT_const_value:
8140 return "DW_AT_const_value";
8141 case DW_AT_containing_type:
8142 return "DW_AT_containing_type";
8143 case DW_AT_default_value:
8144 return "DW_AT_default_value";
8146 return "DW_AT_inline";
8147 case DW_AT_is_optional:
8148 return "DW_AT_is_optional";
8149 case DW_AT_lower_bound:
8150 return "DW_AT_lower_bound";
8151 case DW_AT_producer:
8152 return "DW_AT_producer";
8153 case DW_AT_prototyped:
8154 return "DW_AT_prototyped";
8155 case DW_AT_return_addr:
8156 return "DW_AT_return_addr";
8157 case DW_AT_start_scope:
8158 return "DW_AT_start_scope";
8159 case DW_AT_bit_stride:
8160 return "DW_AT_bit_stride";
8161 case DW_AT_upper_bound:
8162 return "DW_AT_upper_bound";
8163 case DW_AT_abstract_origin:
8164 return "DW_AT_abstract_origin";
8165 case DW_AT_accessibility:
8166 return "DW_AT_accessibility";
8167 case DW_AT_address_class:
8168 return "DW_AT_address_class";
8169 case DW_AT_artificial:
8170 return "DW_AT_artificial";
8171 case DW_AT_base_types:
8172 return "DW_AT_base_types";
8173 case DW_AT_calling_convention:
8174 return "DW_AT_calling_convention";
8176 return "DW_AT_count";
8177 case DW_AT_data_member_location:
8178 return "DW_AT_data_member_location";
8179 case DW_AT_decl_column:
8180 return "DW_AT_decl_column";
8181 case DW_AT_decl_file:
8182 return "DW_AT_decl_file";
8183 case DW_AT_decl_line:
8184 return "DW_AT_decl_line";
8185 case DW_AT_declaration:
8186 return "DW_AT_declaration";
8187 case DW_AT_discr_list:
8188 return "DW_AT_discr_list";
8189 case DW_AT_encoding:
8190 return "DW_AT_encoding";
8191 case DW_AT_external:
8192 return "DW_AT_external";
8193 case DW_AT_frame_base:
8194 return "DW_AT_frame_base";
8196 return "DW_AT_friend";
8197 case DW_AT_identifier_case:
8198 return "DW_AT_identifier_case";
8199 case DW_AT_macro_info:
8200 return "DW_AT_macro_info";
8201 case DW_AT_namelist_items:
8202 return "DW_AT_namelist_items";
8203 case DW_AT_priority:
8204 return "DW_AT_priority";
8206 return "DW_AT_segment";
8207 case DW_AT_specification:
8208 return "DW_AT_specification";
8209 case DW_AT_static_link:
8210 return "DW_AT_static_link";
8212 return "DW_AT_type";
8213 case DW_AT_use_location:
8214 return "DW_AT_use_location";
8215 case DW_AT_variable_parameter:
8216 return "DW_AT_variable_parameter";
8217 case DW_AT_virtuality:
8218 return "DW_AT_virtuality";
8219 case DW_AT_vtable_elem_location:
8220 return "DW_AT_vtable_elem_location";
8221 /* DWARF 3 values. */
8222 case DW_AT_allocated:
8223 return "DW_AT_allocated";
8224 case DW_AT_associated:
8225 return "DW_AT_associated";
8226 case DW_AT_data_location:
8227 return "DW_AT_data_location";
8228 case DW_AT_byte_stride:
8229 return "DW_AT_byte_stride";
8230 case DW_AT_entry_pc:
8231 return "DW_AT_entry_pc";
8232 case DW_AT_use_UTF8:
8233 return "DW_AT_use_UTF8";
8234 case DW_AT_extension:
8235 return "DW_AT_extension";
8237 return "DW_AT_ranges";
8238 case DW_AT_trampoline:
8239 return "DW_AT_trampoline";
8240 case DW_AT_call_column:
8241 return "DW_AT_call_column";
8242 case DW_AT_call_file:
8243 return "DW_AT_call_file";
8244 case DW_AT_call_line:
8245 return "DW_AT_call_line";
8246 case DW_AT_description:
8247 return "DW_AT_description";
8248 case DW_AT_binary_scale:
8249 return "DW_AT_binary_scale";
8250 case DW_AT_decimal_scale:
8251 return "DW_AT_decimal_scale";
8253 return "DW_AT_small";
8254 case DW_AT_decimal_sign:
8255 return "DW_AT_decimal_sign";
8256 case DW_AT_digit_count:
8257 return "DW_AT_digit_count";
8258 case DW_AT_picture_string:
8259 return "DW_AT_picture_string";
8261 return "DW_AT_mutable";
8262 case DW_AT_threads_scaled:
8263 return "DW_AT_threads_scaled";
8264 case DW_AT_explicit:
8265 return "DW_AT_explicit";
8266 case DW_AT_object_pointer:
8267 return "DW_AT_object_pointer";
8268 case DW_AT_endianity:
8269 return "DW_AT_endianity";
8270 case DW_AT_elemental:
8271 return "DW_AT_elemental";
8273 return "DW_AT_pure";
8274 case DW_AT_recursive:
8275 return "DW_AT_recursive";
8277 /* SGI/MIPS extensions. */
8278 case DW_AT_MIPS_fde:
8279 return "DW_AT_MIPS_fde";
8280 case DW_AT_MIPS_loop_begin:
8281 return "DW_AT_MIPS_loop_begin";
8282 case DW_AT_MIPS_tail_loop_begin:
8283 return "DW_AT_MIPS_tail_loop_begin";
8284 case DW_AT_MIPS_epilog_begin:
8285 return "DW_AT_MIPS_epilog_begin";
8286 case DW_AT_MIPS_loop_unroll_factor:
8287 return "DW_AT_MIPS_loop_unroll_factor";
8288 case DW_AT_MIPS_software_pipeline_depth:
8289 return "DW_AT_MIPS_software_pipeline_depth";
8290 case DW_AT_MIPS_linkage_name:
8291 return "DW_AT_MIPS_linkage_name";
8292 case DW_AT_MIPS_stride:
8293 return "DW_AT_MIPS_stride";
8294 case DW_AT_MIPS_abstract_name:
8295 return "DW_AT_MIPS_abstract_name";
8296 case DW_AT_MIPS_clone_origin:
8297 return "DW_AT_MIPS_clone_origin";
8298 case DW_AT_MIPS_has_inlines:
8299 return "DW_AT_MIPS_has_inlines";
8301 /* HP extensions. */
8302 case DW_AT_HP_block_index:
8303 return "DW_AT_HP_block_index";
8304 case DW_AT_HP_unmodifiable:
8305 return "DW_AT_HP_unmodifiable";
8306 case DW_AT_HP_actuals_stmt_list:
8307 return "DW_AT_HP_actuals_stmt_list";
8308 case DW_AT_HP_proc_per_section:
8309 return "DW_AT_HP_proc_per_section";
8310 case DW_AT_HP_raw_data_ptr:
8311 return "DW_AT_HP_raw_data_ptr";
8312 case DW_AT_HP_pass_by_reference:
8313 return "DW_AT_HP_pass_by_reference";
8314 case DW_AT_HP_opt_level:
8315 return "DW_AT_HP_opt_level";
8316 case DW_AT_HP_prof_version_id:
8317 return "DW_AT_HP_prof_version_id";
8318 case DW_AT_HP_opt_flags:
8319 return "DW_AT_HP_opt_flags";
8320 case DW_AT_HP_cold_region_low_pc:
8321 return "DW_AT_HP_cold_region_low_pc";
8322 case DW_AT_HP_cold_region_high_pc:
8323 return "DW_AT_HP_cold_region_high_pc";
8324 case DW_AT_HP_all_variables_modifiable:
8325 return "DW_AT_HP_all_variables_modifiable";
8326 case DW_AT_HP_linkage_name:
8327 return "DW_AT_HP_linkage_name";
8328 case DW_AT_HP_prof_flags:
8329 return "DW_AT_HP_prof_flags";
8330 /* GNU extensions. */
8331 case DW_AT_sf_names:
8332 return "DW_AT_sf_names";
8333 case DW_AT_src_info:
8334 return "DW_AT_src_info";
8335 case DW_AT_mac_info:
8336 return "DW_AT_mac_info";
8337 case DW_AT_src_coords:
8338 return "DW_AT_src_coords";
8339 case DW_AT_body_begin:
8340 return "DW_AT_body_begin";
8341 case DW_AT_body_end:
8342 return "DW_AT_body_end";
8343 case DW_AT_GNU_vector:
8344 return "DW_AT_GNU_vector";
8345 /* VMS extensions. */
8346 case DW_AT_VMS_rtnbeg_pd_address:
8347 return "DW_AT_VMS_rtnbeg_pd_address";
8348 /* UPC extension. */
8349 case DW_AT_upc_threads_scaled:
8350 return "DW_AT_upc_threads_scaled";
8351 /* PGI (STMicroelectronics) extensions. */
8352 case DW_AT_PGI_lbase:
8353 return "DW_AT_PGI_lbase";
8354 case DW_AT_PGI_soffset:
8355 return "DW_AT_PGI_soffset";
8356 case DW_AT_PGI_lstride:
8357 return "DW_AT_PGI_lstride";
8359 return "DW_AT_<unknown>";
8363 /* Convert a DWARF value form code into its string name. */
8366 dwarf_form_name (unsigned form)
8371 return "DW_FORM_addr";
8372 case DW_FORM_block2:
8373 return "DW_FORM_block2";
8374 case DW_FORM_block4:
8375 return "DW_FORM_block4";
8377 return "DW_FORM_data2";
8379 return "DW_FORM_data4";
8381 return "DW_FORM_data8";
8382 case DW_FORM_string:
8383 return "DW_FORM_string";
8385 return "DW_FORM_block";
8386 case DW_FORM_block1:
8387 return "DW_FORM_block1";
8389 return "DW_FORM_data1";
8391 return "DW_FORM_flag";
8393 return "DW_FORM_sdata";
8395 return "DW_FORM_strp";
8397 return "DW_FORM_udata";
8398 case DW_FORM_ref_addr:
8399 return "DW_FORM_ref_addr";
8401 return "DW_FORM_ref1";
8403 return "DW_FORM_ref2";
8405 return "DW_FORM_ref4";
8407 return "DW_FORM_ref8";
8408 case DW_FORM_ref_udata:
8409 return "DW_FORM_ref_udata";
8410 case DW_FORM_indirect:
8411 return "DW_FORM_indirect";
8413 return "DW_FORM_<unknown>";
8417 /* Convert a DWARF stack opcode into its string name. */
8420 dwarf_stack_op_name (unsigned op)
8425 return "DW_OP_addr";
8427 return "DW_OP_deref";
8429 return "DW_OP_const1u";
8431 return "DW_OP_const1s";
8433 return "DW_OP_const2u";
8435 return "DW_OP_const2s";
8437 return "DW_OP_const4u";
8439 return "DW_OP_const4s";
8441 return "DW_OP_const8u";
8443 return "DW_OP_const8s";
8445 return "DW_OP_constu";
8447 return "DW_OP_consts";
8451 return "DW_OP_drop";
8453 return "DW_OP_over";
8455 return "DW_OP_pick";
8457 return "DW_OP_swap";
8461 return "DW_OP_xderef";
8469 return "DW_OP_minus";
8481 return "DW_OP_plus";
8482 case DW_OP_plus_uconst:
8483 return "DW_OP_plus_uconst";
8489 return "DW_OP_shra";
8507 return "DW_OP_skip";
8509 return "DW_OP_lit0";
8511 return "DW_OP_lit1";
8513 return "DW_OP_lit2";
8515 return "DW_OP_lit3";
8517 return "DW_OP_lit4";
8519 return "DW_OP_lit5";
8521 return "DW_OP_lit6";
8523 return "DW_OP_lit7";
8525 return "DW_OP_lit8";
8527 return "DW_OP_lit9";
8529 return "DW_OP_lit10";
8531 return "DW_OP_lit11";
8533 return "DW_OP_lit12";
8535 return "DW_OP_lit13";
8537 return "DW_OP_lit14";
8539 return "DW_OP_lit15";
8541 return "DW_OP_lit16";
8543 return "DW_OP_lit17";
8545 return "DW_OP_lit18";
8547 return "DW_OP_lit19";
8549 return "DW_OP_lit20";
8551 return "DW_OP_lit21";
8553 return "DW_OP_lit22";
8555 return "DW_OP_lit23";
8557 return "DW_OP_lit24";
8559 return "DW_OP_lit25";
8561 return "DW_OP_lit26";
8563 return "DW_OP_lit27";
8565 return "DW_OP_lit28";
8567 return "DW_OP_lit29";
8569 return "DW_OP_lit30";
8571 return "DW_OP_lit31";
8573 return "DW_OP_reg0";
8575 return "DW_OP_reg1";
8577 return "DW_OP_reg2";
8579 return "DW_OP_reg3";
8581 return "DW_OP_reg4";
8583 return "DW_OP_reg5";
8585 return "DW_OP_reg6";
8587 return "DW_OP_reg7";
8589 return "DW_OP_reg8";
8591 return "DW_OP_reg9";
8593 return "DW_OP_reg10";
8595 return "DW_OP_reg11";
8597 return "DW_OP_reg12";
8599 return "DW_OP_reg13";
8601 return "DW_OP_reg14";
8603 return "DW_OP_reg15";
8605 return "DW_OP_reg16";
8607 return "DW_OP_reg17";
8609 return "DW_OP_reg18";
8611 return "DW_OP_reg19";
8613 return "DW_OP_reg20";
8615 return "DW_OP_reg21";
8617 return "DW_OP_reg22";
8619 return "DW_OP_reg23";
8621 return "DW_OP_reg24";
8623 return "DW_OP_reg25";
8625 return "DW_OP_reg26";
8627 return "DW_OP_reg27";
8629 return "DW_OP_reg28";
8631 return "DW_OP_reg29";
8633 return "DW_OP_reg30";
8635 return "DW_OP_reg31";
8637 return "DW_OP_breg0";
8639 return "DW_OP_breg1";
8641 return "DW_OP_breg2";
8643 return "DW_OP_breg3";
8645 return "DW_OP_breg4";
8647 return "DW_OP_breg5";
8649 return "DW_OP_breg6";
8651 return "DW_OP_breg7";
8653 return "DW_OP_breg8";
8655 return "DW_OP_breg9";
8657 return "DW_OP_breg10";
8659 return "DW_OP_breg11";
8661 return "DW_OP_breg12";
8663 return "DW_OP_breg13";
8665 return "DW_OP_breg14";
8667 return "DW_OP_breg15";
8669 return "DW_OP_breg16";
8671 return "DW_OP_breg17";
8673 return "DW_OP_breg18";
8675 return "DW_OP_breg19";
8677 return "DW_OP_breg20";
8679 return "DW_OP_breg21";
8681 return "DW_OP_breg22";
8683 return "DW_OP_breg23";
8685 return "DW_OP_breg24";
8687 return "DW_OP_breg25";
8689 return "DW_OP_breg26";
8691 return "DW_OP_breg27";
8693 return "DW_OP_breg28";
8695 return "DW_OP_breg29";
8697 return "DW_OP_breg30";
8699 return "DW_OP_breg31";
8701 return "DW_OP_regx";
8703 return "DW_OP_fbreg";
8705 return "DW_OP_bregx";
8707 return "DW_OP_piece";
8708 case DW_OP_deref_size:
8709 return "DW_OP_deref_size";
8710 case DW_OP_xderef_size:
8711 return "DW_OP_xderef_size";
8714 /* DWARF 3 extensions. */
8715 case DW_OP_push_object_address:
8716 return "DW_OP_push_object_address";
8718 return "DW_OP_call2";
8720 return "DW_OP_call4";
8721 case DW_OP_call_ref:
8722 return "DW_OP_call_ref";
8723 /* GNU extensions. */
8724 case DW_OP_form_tls_address:
8725 return "DW_OP_form_tls_address";
8726 case DW_OP_call_frame_cfa:
8727 return "DW_OP_call_frame_cfa";
8728 case DW_OP_bit_piece:
8729 return "DW_OP_bit_piece";
8730 case DW_OP_GNU_push_tls_address:
8731 return "DW_OP_GNU_push_tls_address";
8732 case DW_OP_GNU_uninit:
8733 return "DW_OP_GNU_uninit";
8734 /* HP extensions. */
8735 case DW_OP_HP_is_value:
8736 return "DW_OP_HP_is_value";
8737 case DW_OP_HP_fltconst4:
8738 return "DW_OP_HP_fltconst4";
8739 case DW_OP_HP_fltconst8:
8740 return "DW_OP_HP_fltconst8";
8741 case DW_OP_HP_mod_range:
8742 return "DW_OP_HP_mod_range";
8743 case DW_OP_HP_unmod_range:
8744 return "DW_OP_HP_unmod_range";
8746 return "DW_OP_HP_tls";
8748 return "OP_<unknown>";
8753 dwarf_bool_name (unsigned mybool)
8761 /* Convert a DWARF type code into its string name. */
8764 dwarf_type_encoding_name (unsigned enc)
8769 return "DW_ATE_void";
8770 case DW_ATE_address:
8771 return "DW_ATE_address";
8772 case DW_ATE_boolean:
8773 return "DW_ATE_boolean";
8774 case DW_ATE_complex_float:
8775 return "DW_ATE_complex_float";
8777 return "DW_ATE_float";
8779 return "DW_ATE_signed";
8780 case DW_ATE_signed_char:
8781 return "DW_ATE_signed_char";
8782 case DW_ATE_unsigned:
8783 return "DW_ATE_unsigned";
8784 case DW_ATE_unsigned_char:
8785 return "DW_ATE_unsigned_char";
8787 case DW_ATE_imaginary_float:
8788 return "DW_ATE_imaginary_float";
8789 case DW_ATE_packed_decimal:
8790 return "DW_ATE_packed_decimal";
8791 case DW_ATE_numeric_string:
8792 return "DW_ATE_numeric_string";
8794 return "DW_ATE_edited";
8795 case DW_ATE_signed_fixed:
8796 return "DW_ATE_signed_fixed";
8797 case DW_ATE_unsigned_fixed:
8798 return "DW_ATE_unsigned_fixed";
8799 case DW_ATE_decimal_float:
8800 return "DW_ATE_decimal_float";
8801 /* HP extensions. */
8802 case DW_ATE_HP_float80:
8803 return "DW_ATE_HP_float80";
8804 case DW_ATE_HP_complex_float80:
8805 return "DW_ATE_HP_complex_float80";
8806 case DW_ATE_HP_float128:
8807 return "DW_ATE_HP_float128";
8808 case DW_ATE_HP_complex_float128:
8809 return "DW_ATE_HP_complex_float128";
8810 case DW_ATE_HP_floathpintel:
8811 return "DW_ATE_HP_floathpintel";
8812 case DW_ATE_HP_imaginary_float80:
8813 return "DW_ATE_HP_imaginary_float80";
8814 case DW_ATE_HP_imaginary_float128:
8815 return "DW_ATE_HP_imaginary_float128";
8817 return "DW_ATE_<unknown>";
8821 /* Convert a DWARF call frame info operation to its string name. */
8825 dwarf_cfi_name (unsigned cfi_opc)
8829 case DW_CFA_advance_loc:
8830 return "DW_CFA_advance_loc";
8832 return "DW_CFA_offset";
8833 case DW_CFA_restore:
8834 return "DW_CFA_restore";
8836 return "DW_CFA_nop";
8837 case DW_CFA_set_loc:
8838 return "DW_CFA_set_loc";
8839 case DW_CFA_advance_loc1:
8840 return "DW_CFA_advance_loc1";
8841 case DW_CFA_advance_loc2:
8842 return "DW_CFA_advance_loc2";
8843 case DW_CFA_advance_loc4:
8844 return "DW_CFA_advance_loc4";
8845 case DW_CFA_offset_extended:
8846 return "DW_CFA_offset_extended";
8847 case DW_CFA_restore_extended:
8848 return "DW_CFA_restore_extended";
8849 case DW_CFA_undefined:
8850 return "DW_CFA_undefined";
8851 case DW_CFA_same_value:
8852 return "DW_CFA_same_value";
8853 case DW_CFA_register:
8854 return "DW_CFA_register";
8855 case DW_CFA_remember_state:
8856 return "DW_CFA_remember_state";
8857 case DW_CFA_restore_state:
8858 return "DW_CFA_restore_state";
8859 case DW_CFA_def_cfa:
8860 return "DW_CFA_def_cfa";
8861 case DW_CFA_def_cfa_register:
8862 return "DW_CFA_def_cfa_register";
8863 case DW_CFA_def_cfa_offset:
8864 return "DW_CFA_def_cfa_offset";
8866 case DW_CFA_def_cfa_expression:
8867 return "DW_CFA_def_cfa_expression";
8868 case DW_CFA_expression:
8869 return "DW_CFA_expression";
8870 case DW_CFA_offset_extended_sf:
8871 return "DW_CFA_offset_extended_sf";
8872 case DW_CFA_def_cfa_sf:
8873 return "DW_CFA_def_cfa_sf";
8874 case DW_CFA_def_cfa_offset_sf:
8875 return "DW_CFA_def_cfa_offset_sf";
8876 case DW_CFA_val_offset:
8877 return "DW_CFA_val_offset";
8878 case DW_CFA_val_offset_sf:
8879 return "DW_CFA_val_offset_sf";
8880 case DW_CFA_val_expression:
8881 return "DW_CFA_val_expression";
8882 /* SGI/MIPS specific. */
8883 case DW_CFA_MIPS_advance_loc8:
8884 return "DW_CFA_MIPS_advance_loc8";
8885 /* GNU extensions. */
8886 case DW_CFA_GNU_window_save:
8887 return "DW_CFA_GNU_window_save";
8888 case DW_CFA_GNU_args_size:
8889 return "DW_CFA_GNU_args_size";
8890 case DW_CFA_GNU_negative_offset_extended:
8891 return "DW_CFA_GNU_negative_offset_extended";
8893 return "DW_CFA_<unknown>";
8899 dump_die (struct die_info *die)
8903 fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
8904 dwarf_tag_name (die->tag), die->abbrev, die->offset);
8905 fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
8906 dwarf_bool_name (die->child != NULL));
8908 fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
8909 for (i = 0; i < die->num_attrs; ++i)
8911 fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
8912 dwarf_attr_name (die->attrs[i].name),
8913 dwarf_form_name (die->attrs[i].form));
8914 switch (die->attrs[i].form)
8916 case DW_FORM_ref_addr:
8918 fprintf_unfiltered (gdb_stderr, "address: ");
8919 deprecated_print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
8921 case DW_FORM_block2:
8922 case DW_FORM_block4:
8924 case DW_FORM_block1:
8925 fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
8930 fprintf_unfiltered (gdb_stderr, "constant ref: %ld (adjusted)",
8931 (long) (DW_ADDR (&die->attrs[i])));
8939 fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
8941 case DW_FORM_string:
8943 fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
8944 DW_STRING (&die->attrs[i])
8945 ? DW_STRING (&die->attrs[i]) : "");
8948 if (DW_UNSND (&die->attrs[i]))
8949 fprintf_unfiltered (gdb_stderr, "flag: TRUE");
8951 fprintf_unfiltered (gdb_stderr, "flag: FALSE");
8953 case DW_FORM_indirect:
8954 /* the reader will have reduced the indirect form to
8955 the "base form" so this form should not occur */
8956 fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
8959 fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
8960 die->attrs[i].form);
8962 fprintf_unfiltered (gdb_stderr, "\n");
8967 dump_die_list (struct die_info *die)
8972 if (die->child != NULL)
8973 dump_die_list (die->child);
8974 if (die->sibling != NULL)
8975 dump_die_list (die->sibling);
8980 store_in_ref_table (unsigned int offset, struct die_info *die,
8981 struct dwarf2_cu *cu)
8984 struct die_info *old;
8986 h = (offset % REF_HASH_SIZE);
8987 old = cu->die_ref_table[h];
8988 die->next_ref = old;
8989 cu->die_ref_table[h] = die;
8993 dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu)
8995 unsigned int result = 0;
8999 case DW_FORM_ref_addr:
9004 case DW_FORM_ref_udata:
9005 result = DW_ADDR (attr);
9008 complaint (&symfile_complaints,
9009 _("unsupported die ref attribute form: '%s'"),
9010 dwarf_form_name (attr->form));
9015 /* Return the constant value held by the given attribute. Return -1
9016 if the value held by the attribute is not constant. */
9019 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
9021 if (attr->form == DW_FORM_sdata)
9022 return DW_SND (attr);
9023 else if (attr->form == DW_FORM_udata
9024 || attr->form == DW_FORM_data1
9025 || attr->form == DW_FORM_data2
9026 || attr->form == DW_FORM_data4
9027 || attr->form == DW_FORM_data8)
9028 return DW_UNSND (attr);
9031 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
9032 dwarf_form_name (attr->form));
9033 return default_value;
9037 static struct die_info *
9038 follow_die_ref (struct die_info *src_die, struct attribute *attr,
9039 struct dwarf2_cu *cu)
9041 struct die_info *die;
9042 unsigned int offset;
9044 struct die_info temp_die;
9045 struct dwarf2_cu *target_cu;
9047 offset = dwarf2_get_ref_die_offset (attr, cu);
9049 if (DW_ADDR (attr) < cu->header.offset
9050 || DW_ADDR (attr) >= cu->header.offset + cu->header.length)
9052 struct dwarf2_per_cu_data *per_cu;
9053 per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (attr),
9055 target_cu = per_cu->cu;
9060 h = (offset % REF_HASH_SIZE);
9061 die = target_cu->die_ref_table[h];
9064 if (die->offset == offset)
9066 die = die->next_ref;
9069 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9070 "at 0x%lx [in module %s]"),
9071 (long) src_die->offset, (long) offset, cu->objfile->name);
9076 /* Decode simple location descriptions.
9077 Given a pointer to a dwarf block that defines a location, compute
9078 the location and return the value.
9080 NOTE drow/2003-11-18: This function is called in two situations
9081 now: for the address of static or global variables (partial symbols
9082 only) and for offsets into structures which are expected to be
9083 (more or less) constant. The partial symbol case should go away,
9084 and only the constant case should remain. That will let this
9085 function complain more accurately. A few special modes are allowed
9086 without complaint for global variables (for instance, global
9087 register values and thread-local values).
9089 A location description containing no operations indicates that the
9090 object is optimized out. The return value is 0 for that case.
9091 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9092 callers will only want a very basic result and this can become a
9095 Note that stack[0] is unused except as a default error return.
9096 Note that stack overflow is not yet handled. */
9099 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
9101 struct objfile *objfile = cu->objfile;
9102 struct comp_unit_head *cu_header = &cu->header;
9104 int size = blk->size;
9105 gdb_byte *data = blk->data;
9106 CORE_ADDR stack[64];
9108 unsigned int bytes_read, unsnd;
9152 stack[++stacki] = op - DW_OP_lit0;
9187 stack[++stacki] = op - DW_OP_reg0;
9189 dwarf2_complex_location_expr_complaint ();
9193 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
9195 stack[++stacki] = unsnd;
9197 dwarf2_complex_location_expr_complaint ();
9201 stack[++stacki] = read_address (objfile->obfd, &data[i],
9207 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
9212 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
9217 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
9222 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
9227 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
9232 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
9237 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
9243 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
9248 stack[stacki + 1] = stack[stacki];
9253 stack[stacki - 1] += stack[stacki];
9257 case DW_OP_plus_uconst:
9258 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
9263 stack[stacki - 1] -= stack[stacki];
9268 /* If we're not the last op, then we definitely can't encode
9269 this using GDB's address_class enum. This is valid for partial
9270 global symbols, although the variable's address will be bogus
9273 dwarf2_complex_location_expr_complaint ();
9276 case DW_OP_GNU_push_tls_address:
9277 /* The top of the stack has the offset from the beginning
9278 of the thread control block at which the variable is located. */
9279 /* Nothing should follow this operator, so the top of stack would
9281 /* This is valid for partial global symbols, but the variable's
9282 address will be bogus in the psymtab. */
9284 dwarf2_complex_location_expr_complaint ();
9287 case DW_OP_GNU_uninit:
9291 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
9292 dwarf_stack_op_name (op));
9293 return (stack[stacki]);
9296 return (stack[stacki]);
9299 /* memory allocation interface */
9301 static struct dwarf_block *
9302 dwarf_alloc_block (struct dwarf2_cu *cu)
9304 struct dwarf_block *blk;
9306 blk = (struct dwarf_block *)
9307 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
9311 static struct abbrev_info *
9312 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
9314 struct abbrev_info *abbrev;
9316 abbrev = (struct abbrev_info *)
9317 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
9318 memset (abbrev, 0, sizeof (struct abbrev_info));
9322 static struct die_info *
9323 dwarf_alloc_die (void)
9325 struct die_info *die;
9327 die = (struct die_info *) xmalloc (sizeof (struct die_info));
9328 memset (die, 0, sizeof (struct die_info));
9333 /* Macro support. */
9336 /* Return the full name of file number I in *LH's file name table.
9337 Use COMP_DIR as the name of the current directory of the
9338 compilation. The result is allocated using xmalloc; the caller is
9339 responsible for freeing it. */
9341 file_full_name (int file, struct line_header *lh, const char *comp_dir)
9343 /* Is the file number a valid index into the line header's file name
9344 table? Remember that file numbers start with one, not zero. */
9345 if (1 <= file && file <= lh->num_file_names)
9347 struct file_entry *fe = &lh->file_names[file - 1];
9349 if (IS_ABSOLUTE_PATH (fe->name))
9350 return xstrdup (fe->name);
9358 dir = lh->include_dirs[fe->dir_index - 1];
9364 dir_len = strlen (dir);
9365 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
9366 strcpy (full_name, dir);
9367 full_name[dir_len] = '/';
9368 strcpy (full_name + dir_len + 1, fe->name);
9372 return xstrdup (fe->name);
9377 /* The compiler produced a bogus file number. We can at least
9378 record the macro definitions made in the file, even if we
9379 won't be able to find the file by name. */
9381 sprintf (fake_name, "<bad macro file number %d>", file);
9383 complaint (&symfile_complaints,
9384 _("bad file number in macro information (%d)"),
9387 return xstrdup (fake_name);
9392 static struct macro_source_file *
9393 macro_start_file (int file, int line,
9394 struct macro_source_file *current_file,
9395 const char *comp_dir,
9396 struct line_header *lh, struct objfile *objfile)
9398 /* The full name of this source file. */
9399 char *full_name = file_full_name (file, lh, comp_dir);
9401 /* We don't create a macro table for this compilation unit
9402 at all until we actually get a filename. */
9403 if (! pending_macros)
9404 pending_macros = new_macro_table (&objfile->objfile_obstack,
9405 objfile->macro_cache);
9408 /* If we have no current file, then this must be the start_file
9409 directive for the compilation unit's main source file. */
9410 current_file = macro_set_main (pending_macros, full_name);
9412 current_file = macro_include (current_file, line, full_name);
9416 return current_file;
9420 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9421 followed by a null byte. */
9423 copy_string (const char *buf, int len)
9425 char *s = xmalloc (len + 1);
9426 memcpy (s, buf, len);
9434 consume_improper_spaces (const char *p, const char *body)
9438 complaint (&symfile_complaints,
9439 _("macro definition contains spaces in formal argument list:\n`%s'"),
9451 parse_macro_definition (struct macro_source_file *file, int line,
9456 /* The body string takes one of two forms. For object-like macro
9457 definitions, it should be:
9459 <macro name> " " <definition>
9461 For function-like macro definitions, it should be:
9463 <macro name> "() " <definition>
9465 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9467 Spaces may appear only where explicitly indicated, and in the
9470 The Dwarf 2 spec says that an object-like macro's name is always
9471 followed by a space, but versions of GCC around March 2002 omit
9472 the space when the macro's definition is the empty string.
9474 The Dwarf 2 spec says that there should be no spaces between the
9475 formal arguments in a function-like macro's formal argument list,
9476 but versions of GCC around March 2002 include spaces after the
9480 /* Find the extent of the macro name. The macro name is terminated
9481 by either a space or null character (for an object-like macro) or
9482 an opening paren (for a function-like macro). */
9483 for (p = body; *p; p++)
9484 if (*p == ' ' || *p == '(')
9487 if (*p == ' ' || *p == '\0')
9489 /* It's an object-like macro. */
9490 int name_len = p - body;
9491 char *name = copy_string (body, name_len);
9492 const char *replacement;
9495 replacement = body + name_len + 1;
9498 dwarf2_macro_malformed_definition_complaint (body);
9499 replacement = body + name_len;
9502 macro_define_object (file, line, name, replacement);
9508 /* It's a function-like macro. */
9509 char *name = copy_string (body, p - body);
9512 char **argv = xmalloc (argv_size * sizeof (*argv));
9516 p = consume_improper_spaces (p, body);
9518 /* Parse the formal argument list. */
9519 while (*p && *p != ')')
9521 /* Find the extent of the current argument name. */
9522 const char *arg_start = p;
9524 while (*p && *p != ',' && *p != ')' && *p != ' ')
9527 if (! *p || p == arg_start)
9528 dwarf2_macro_malformed_definition_complaint (body);
9531 /* Make sure argv has room for the new argument. */
9532 if (argc >= argv_size)
9535 argv = xrealloc (argv, argv_size * sizeof (*argv));
9538 argv[argc++] = copy_string (arg_start, p - arg_start);
9541 p = consume_improper_spaces (p, body);
9543 /* Consume the comma, if present. */
9548 p = consume_improper_spaces (p, body);
9557 /* Perfectly formed definition, no complaints. */
9558 macro_define_function (file, line, name,
9559 argc, (const char **) argv,
9561 else if (*p == '\0')
9563 /* Complain, but do define it. */
9564 dwarf2_macro_malformed_definition_complaint (body);
9565 macro_define_function (file, line, name,
9566 argc, (const char **) argv,
9570 /* Just complain. */
9571 dwarf2_macro_malformed_definition_complaint (body);
9574 /* Just complain. */
9575 dwarf2_macro_malformed_definition_complaint (body);
9581 for (i = 0; i < argc; i++)
9587 dwarf2_macro_malformed_definition_complaint (body);
9592 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
9593 char *comp_dir, bfd *abfd,
9594 struct dwarf2_cu *cu)
9596 gdb_byte *mac_ptr, *mac_end;
9597 struct macro_source_file *current_file = 0;
9599 if (dwarf2_per_objfile->macinfo_buffer == NULL)
9601 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
9605 mac_ptr = dwarf2_per_objfile->macinfo_buffer + offset;
9606 mac_end = dwarf2_per_objfile->macinfo_buffer
9607 + dwarf2_per_objfile->macinfo_size;
9611 enum dwarf_macinfo_record_type macinfo_type;
9613 /* Do we at least have room for a macinfo type byte? */
9614 if (mac_ptr >= mac_end)
9616 dwarf2_macros_too_long_complaint ();
9620 macinfo_type = read_1_byte (abfd, mac_ptr);
9623 switch (macinfo_type)
9625 /* A zero macinfo type indicates the end of the macro
9630 case DW_MACINFO_define:
9631 case DW_MACINFO_undef:
9633 unsigned int bytes_read;
9637 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9638 mac_ptr += bytes_read;
9639 body = read_string (abfd, mac_ptr, &bytes_read);
9640 mac_ptr += bytes_read;
9643 complaint (&symfile_complaints,
9644 _("debug info gives macro %s outside of any file: %s"),
9646 DW_MACINFO_define ? "definition" : macinfo_type ==
9647 DW_MACINFO_undef ? "undefinition" :
9648 "something-or-other", body);
9651 if (macinfo_type == DW_MACINFO_define)
9652 parse_macro_definition (current_file, line, body);
9653 else if (macinfo_type == DW_MACINFO_undef)
9654 macro_undef (current_file, line, body);
9659 case DW_MACINFO_start_file:
9661 unsigned int bytes_read;
9664 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9665 mac_ptr += bytes_read;
9666 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9667 mac_ptr += bytes_read;
9669 current_file = macro_start_file (file, line,
9670 current_file, comp_dir,
9675 case DW_MACINFO_end_file:
9677 complaint (&symfile_complaints,
9678 _("macro debug info has an unmatched `close_file' directive"));
9681 current_file = current_file->included_by;
9684 enum dwarf_macinfo_record_type next_type;
9686 /* GCC circa March 2002 doesn't produce the zero
9687 type byte marking the end of the compilation
9688 unit. Complain if it's not there, but exit no
9691 /* Do we at least have room for a macinfo type byte? */
9692 if (mac_ptr >= mac_end)
9694 dwarf2_macros_too_long_complaint ();
9698 /* We don't increment mac_ptr here, so this is just
9700 next_type = read_1_byte (abfd, mac_ptr);
9702 complaint (&symfile_complaints,
9703 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9710 case DW_MACINFO_vendor_ext:
9712 unsigned int bytes_read;
9716 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9717 mac_ptr += bytes_read;
9718 string = read_string (abfd, mac_ptr, &bytes_read);
9719 mac_ptr += bytes_read;
9721 /* We don't recognize any vendor extensions. */
9728 /* Check if the attribute's form is a DW_FORM_block*
9729 if so return true else false. */
9731 attr_form_is_block (struct attribute *attr)
9733 return (attr == NULL ? 0 :
9734 attr->form == DW_FORM_block1
9735 || attr->form == DW_FORM_block2
9736 || attr->form == DW_FORM_block4
9737 || attr->form == DW_FORM_block);
9740 /* Return non-zero if ATTR's value is a section offset --- classes
9741 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
9742 You may use DW_UNSND (attr) to retrieve such offsets.
9744 Section 7.5.4, "Attribute Encodings", explains that no attribute
9745 may have a value that belongs to more than one of these classes; it
9746 would be ambiguous if we did, because we use the same forms for all
9749 attr_form_is_section_offset (struct attribute *attr)
9751 return (attr->form == DW_FORM_data4
9752 || attr->form == DW_FORM_data8);
9756 /* Return non-zero if ATTR's value falls in the 'constant' class, or
9757 zero otherwise. When this function returns true, you can apply
9758 dwarf2_get_attr_constant_value to it.
9760 However, note that for some attributes you must check
9761 attr_form_is_section_offset before using this test. DW_FORM_data4
9762 and DW_FORM_data8 are members of both the constant class, and of
9763 the classes that contain offsets into other debug sections
9764 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
9765 that, if an attribute's can be either a constant or one of the
9766 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
9767 taken as section offsets, not constants. */
9769 attr_form_is_constant (struct attribute *attr)
9786 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
9787 struct dwarf2_cu *cu)
9789 struct objfile *objfile = cu->objfile;
9791 /* Save the master objfile, so that we can report and look up the
9792 correct file containing this variable. */
9793 if (objfile->separate_debug_objfile_backlink)
9794 objfile = objfile->separate_debug_objfile_backlink;
9796 if (attr_form_is_section_offset (attr)
9797 /* ".debug_loc" may not exist at all, or the offset may be outside
9798 the section. If so, fall through to the complaint in the
9800 && DW_UNSND (attr) < dwarf2_per_objfile->loc_size)
9802 struct dwarf2_loclist_baton *baton;
9804 baton = obstack_alloc (&cu->objfile->objfile_obstack,
9805 sizeof (struct dwarf2_loclist_baton));
9806 baton->objfile = objfile;
9808 /* We don't know how long the location list is, but make sure we
9809 don't run off the edge of the section. */
9810 baton->size = dwarf2_per_objfile->loc_size - DW_UNSND (attr);
9811 baton->data = dwarf2_per_objfile->loc_buffer + DW_UNSND (attr);
9812 baton->base_address = cu->header.base_address;
9813 if (cu->header.base_known == 0)
9814 complaint (&symfile_complaints,
9815 _("Location list used without specifying the CU base address."));
9817 SYMBOL_OPS (sym) = &dwarf2_loclist_funcs;
9818 SYMBOL_LOCATION_BATON (sym) = baton;
9822 struct dwarf2_locexpr_baton *baton;
9824 baton = obstack_alloc (&cu->objfile->objfile_obstack,
9825 sizeof (struct dwarf2_locexpr_baton));
9826 baton->objfile = objfile;
9828 if (attr_form_is_block (attr))
9830 /* Note that we're just copying the block's data pointer
9831 here, not the actual data. We're still pointing into the
9832 info_buffer for SYM's objfile; right now we never release
9833 that buffer, but when we do clean up properly this may
9835 baton->size = DW_BLOCK (attr)->size;
9836 baton->data = DW_BLOCK (attr)->data;
9840 dwarf2_invalid_attrib_class_complaint ("location description",
9841 SYMBOL_NATURAL_NAME (sym));
9846 SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs;
9847 SYMBOL_LOCATION_BATON (sym) = baton;
9851 /* Locate the compilation unit from CU's objfile which contains the
9852 DIE at OFFSET. Raises an error on failure. */
9854 static struct dwarf2_per_cu_data *
9855 dwarf2_find_containing_comp_unit (unsigned long offset,
9856 struct objfile *objfile)
9858 struct dwarf2_per_cu_data *this_cu;
9862 high = dwarf2_per_objfile->n_comp_units - 1;
9865 int mid = low + (high - low) / 2;
9866 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
9871 gdb_assert (low == high);
9872 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
9875 error (_("Dwarf Error: could not find partial DIE containing "
9876 "offset 0x%lx [in module %s]"),
9877 (long) offset, bfd_get_filename (objfile->obfd));
9879 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
9880 return dwarf2_per_objfile->all_comp_units[low-1];
9884 this_cu = dwarf2_per_objfile->all_comp_units[low];
9885 if (low == dwarf2_per_objfile->n_comp_units - 1
9886 && offset >= this_cu->offset + this_cu->length)
9887 error (_("invalid dwarf2 offset %ld"), offset);
9888 gdb_assert (offset < this_cu->offset + this_cu->length);
9893 /* Locate the compilation unit from OBJFILE which is located at exactly
9894 OFFSET. Raises an error on failure. */
9896 static struct dwarf2_per_cu_data *
9897 dwarf2_find_comp_unit (unsigned long offset, struct objfile *objfile)
9899 struct dwarf2_per_cu_data *this_cu;
9900 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
9901 if (this_cu->offset != offset)
9902 error (_("no compilation unit with offset %ld."), offset);
9906 /* Release one cached compilation unit, CU. We unlink it from the tree
9907 of compilation units, but we don't remove it from the read_in_chain;
9908 the caller is responsible for that. */
9911 free_one_comp_unit (void *data)
9913 struct dwarf2_cu *cu = data;
9915 if (cu->per_cu != NULL)
9916 cu->per_cu->cu = NULL;
9919 obstack_free (&cu->comp_unit_obstack, NULL);
9921 free_die_list (cu->dies);
9926 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9927 when we're finished with it. We can't free the pointer itself, but be
9928 sure to unlink it from the cache. Also release any associated storage
9929 and perform cache maintenance.
9931 Only used during partial symbol parsing. */
9934 free_stack_comp_unit (void *data)
9936 struct dwarf2_cu *cu = data;
9938 obstack_free (&cu->comp_unit_obstack, NULL);
9939 cu->partial_dies = NULL;
9941 if (cu->per_cu != NULL)
9943 /* This compilation unit is on the stack in our caller, so we
9944 should not xfree it. Just unlink it. */
9945 cu->per_cu->cu = NULL;
9948 /* If we had a per-cu pointer, then we may have other compilation
9949 units loaded, so age them now. */
9950 age_cached_comp_units ();
9954 /* Free all cached compilation units. */
9957 free_cached_comp_units (void *data)
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 free_one_comp_unit (per_cu->cu);
9970 *last_chain = next_cu;
9976 /* Increase the age counter on each cached compilation unit, and free
9977 any that are too old. */
9980 age_cached_comp_units (void)
9982 struct dwarf2_per_cu_data *per_cu, **last_chain;
9984 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
9985 per_cu = dwarf2_per_objfile->read_in_chain;
9986 while (per_cu != NULL)
9988 per_cu->cu->last_used ++;
9989 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
9990 dwarf2_mark (per_cu->cu);
9991 per_cu = per_cu->cu->read_in_chain;
9994 per_cu = dwarf2_per_objfile->read_in_chain;
9995 last_chain = &dwarf2_per_objfile->read_in_chain;
9996 while (per_cu != NULL)
9998 struct dwarf2_per_cu_data *next_cu;
10000 next_cu = per_cu->cu->read_in_chain;
10002 if (!per_cu->cu->mark)
10004 free_one_comp_unit (per_cu->cu);
10005 *last_chain = next_cu;
10008 last_chain = &per_cu->cu->read_in_chain;
10014 /* Remove a single compilation unit from the cache. */
10017 free_one_cached_comp_unit (void *target_cu)
10019 struct dwarf2_per_cu_data *per_cu, **last_chain;
10021 per_cu = dwarf2_per_objfile->read_in_chain;
10022 last_chain = &dwarf2_per_objfile->read_in_chain;
10023 while (per_cu != NULL)
10025 struct dwarf2_per_cu_data *next_cu;
10027 next_cu = per_cu->cu->read_in_chain;
10029 if (per_cu->cu == target_cu)
10031 free_one_comp_unit (per_cu->cu);
10032 *last_chain = next_cu;
10036 last_chain = &per_cu->cu->read_in_chain;
10042 /* Release all extra memory associated with OBJFILE. */
10045 dwarf2_free_objfile (struct objfile *objfile)
10047 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
10049 if (dwarf2_per_objfile == NULL)
10052 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10053 free_cached_comp_units (NULL);
10055 /* Everything else should be on the objfile obstack. */
10058 /* A pair of DIE offset and GDB type pointer. We store these
10059 in a hash table separate from the DIEs, and preserve them
10060 when the DIEs are flushed out of cache. */
10062 struct dwarf2_offset_and_type
10064 unsigned int offset;
10068 /* Hash function for a dwarf2_offset_and_type. */
10071 offset_and_type_hash (const void *item)
10073 const struct dwarf2_offset_and_type *ofs = item;
10074 return ofs->offset;
10077 /* Equality function for a dwarf2_offset_and_type. */
10080 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
10082 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
10083 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
10084 return ofs_lhs->offset == ofs_rhs->offset;
10087 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10088 table if necessary. */
10091 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
10093 struct dwarf2_offset_and_type **slot, ofs;
10097 if (cu->per_cu == NULL)
10100 if (cu->per_cu->type_hash == NULL)
10101 cu->per_cu->type_hash
10102 = htab_create_alloc_ex (cu->header.length / 24,
10103 offset_and_type_hash,
10104 offset_and_type_eq,
10106 &cu->objfile->objfile_obstack,
10107 hashtab_obstack_allocate,
10108 dummy_obstack_deallocate);
10110 ofs.offset = die->offset;
10112 slot = (struct dwarf2_offset_and_type **)
10113 htab_find_slot_with_hash (cu->per_cu->type_hash, &ofs, ofs.offset, INSERT);
10114 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
10118 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10119 have a saved type. */
10121 static struct type *
10122 get_die_type (struct die_info *die, htab_t type_hash)
10124 struct dwarf2_offset_and_type *slot, ofs;
10126 ofs.offset = die->offset;
10127 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
10134 /* Restore the types of the DIE tree starting at START_DIE from the hash
10135 table saved in CU. */
10138 reset_die_and_siblings_types (struct die_info *start_die, struct dwarf2_cu *cu)
10140 struct die_info *die;
10142 if (cu->per_cu->type_hash == NULL)
10145 for (die = start_die; die != NULL; die = die->sibling)
10147 die->type = get_die_type (die, cu->per_cu->type_hash);
10148 if (die->child != NULL)
10149 reset_die_and_siblings_types (die->child, cu);
10153 /* Set the mark field in CU and in every other compilation unit in the
10154 cache that we must keep because we are keeping CU. */
10156 /* Add a dependence relationship from CU to REF_PER_CU. */
10159 dwarf2_add_dependence (struct dwarf2_cu *cu,
10160 struct dwarf2_per_cu_data *ref_per_cu)
10164 if (cu->dependencies == NULL)
10166 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
10167 NULL, &cu->comp_unit_obstack,
10168 hashtab_obstack_allocate,
10169 dummy_obstack_deallocate);
10171 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
10173 *slot = ref_per_cu;
10176 /* Set the mark field in CU and in every other compilation unit in the
10177 cache that we must keep because we are keeping CU. */
10180 dwarf2_mark_helper (void **slot, void *data)
10182 struct dwarf2_per_cu_data *per_cu;
10184 per_cu = (struct dwarf2_per_cu_data *) *slot;
10185 if (per_cu->cu->mark)
10187 per_cu->cu->mark = 1;
10189 if (per_cu->cu->dependencies != NULL)
10190 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
10196 dwarf2_mark (struct dwarf2_cu *cu)
10201 if (cu->dependencies != NULL)
10202 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
10206 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
10210 per_cu->cu->mark = 0;
10211 per_cu = per_cu->cu->read_in_chain;
10215 /* Trivial hash function for partial_die_info: the hash value of a DIE
10216 is its offset in .debug_info for this objfile. */
10219 partial_die_hash (const void *item)
10221 const struct partial_die_info *part_die = item;
10222 return part_die->offset;
10225 /* Trivial comparison function for partial_die_info structures: two DIEs
10226 are equal if they have the same offset. */
10229 partial_die_eq (const void *item_lhs, const void *item_rhs)
10231 const struct partial_die_info *part_die_lhs = item_lhs;
10232 const struct partial_die_info *part_die_rhs = item_rhs;
10233 return part_die_lhs->offset == part_die_rhs->offset;
10236 static struct cmd_list_element *set_dwarf2_cmdlist;
10237 static struct cmd_list_element *show_dwarf2_cmdlist;
10240 set_dwarf2_cmd (char *args, int from_tty)
10242 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
10246 show_dwarf2_cmd (char *args, int from_tty)
10248 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
10251 void _initialize_dwarf2_read (void);
10254 _initialize_dwarf2_read (void)
10256 dwarf2_objfile_data_key = register_objfile_data ();
10258 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
10259 Set DWARF 2 specific variables.\n\
10260 Configure DWARF 2 variables such as the cache size"),
10261 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
10262 0/*allow-unknown*/, &maintenance_set_cmdlist);
10264 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
10265 Show DWARF 2 specific variables\n\
10266 Show DWARF 2 variables such as the cache size"),
10267 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
10268 0/*allow-unknown*/, &maintenance_show_cmdlist);
10270 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
10271 &dwarf2_max_cache_age, _("\
10272 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10273 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10274 A higher limit means that cached compilation units will be stored\n\
10275 in memory longer, and more total memory will be used. Zero disables\n\
10276 caching, which can slow down startup."),
10278 show_dwarf2_max_cache_age,
10279 &set_dwarf2_cmdlist,
10280 &show_dwarf2_cmdlist);