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 /* Maintain an array of referenced fundamental types for the current
292 compilation unit being read. For DWARF version 1, we have to construct
293 the fundamental types on the fly, since no information about the
294 fundamental types is supplied. Each such fundamental type is created by
295 calling a language dependent routine to create the type, and then a
296 pointer to that type is then placed in the array at the index specified
297 by it's FT_<TYPENAME> value. The array has a fixed size set by the
298 FT_NUM_MEMBERS compile time constant, which is the number of predefined
299 fundamental types gdb knows how to construct. */
300 struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
302 /* DWARF abbreviation table associated with this compilation unit. */
303 struct abbrev_info **dwarf2_abbrevs;
305 /* Storage for the abbrev table. */
306 struct obstack abbrev_obstack;
308 /* Hash table holding all the loaded partial DIEs. */
311 /* Storage for things with the same lifetime as this read-in compilation
312 unit, including partial DIEs. */
313 struct obstack comp_unit_obstack;
315 /* When multiple dwarf2_cu structures are living in memory, this field
316 chains them all together, so that they can be released efficiently.
317 We will probably also want a generation counter so that most-recently-used
318 compilation units are cached... */
319 struct dwarf2_per_cu_data *read_in_chain;
321 /* Backchain to our per_cu entry if the tree has been built. */
322 struct dwarf2_per_cu_data *per_cu;
324 /* How many compilation units ago was this CU last referenced? */
327 /* A hash table of die offsets for following references. */
328 struct die_info *die_ref_table[REF_HASH_SIZE];
330 /* Full DIEs if read in. */
331 struct die_info *dies;
333 /* A set of pointers to dwarf2_per_cu_data objects for compilation
334 units referenced by this one. Only set during full symbol processing;
335 partial symbol tables do not have dependencies. */
338 /* Header data from the line table, during full symbol processing. */
339 struct line_header *line_header;
341 /* Mark used when releasing cached dies. */
342 unsigned int mark : 1;
344 /* This flag will be set if this compilation unit might include
345 inter-compilation-unit references. */
346 unsigned int has_form_ref_addr : 1;
348 /* This flag will be set if this compilation unit includes any
349 DW_TAG_namespace DIEs. If we know that there are explicit
350 DIEs for namespaces, we don't need to try to infer them
351 from mangled names. */
352 unsigned int has_namespace_info : 1;
355 /* Persistent data held for a compilation unit, even when not
356 processing it. We put a pointer to this structure in the
357 read_symtab_private field of the psymtab. If we encounter
358 inter-compilation-unit references, we also maintain a sorted
359 list of all compilation units. */
361 struct dwarf2_per_cu_data
363 /* The start offset and length of this compilation unit. 2**30-1
364 bytes should suffice to store the length of any compilation unit
365 - if it doesn't, GDB will fall over anyway. */
366 unsigned long offset;
367 unsigned long length : 30;
369 /* Flag indicating this compilation unit will be read in before
370 any of the current compilation units are processed. */
371 unsigned long queued : 1;
373 /* This flag will be set if we need to load absolutely all DIEs
374 for this compilation unit, instead of just the ones we think
375 are interesting. It gets set if we look for a DIE in the
376 hash table and don't find it. */
377 unsigned int load_all_dies : 1;
379 /* Set iff currently read in. */
380 struct dwarf2_cu *cu;
382 /* If full symbols for this CU have been read in, then this field
383 holds a map of DIE offsets to types. It isn't always possible
384 to reconstruct this information later, so we have to preserve
388 /* The partial symbol table associated with this compilation unit,
389 or NULL for partial units (which do not have an associated
391 struct partial_symtab *psymtab;
394 /* The line number information for a compilation unit (found in the
395 .debug_line section) begins with a "statement program header",
396 which contains the following information. */
399 unsigned int total_length;
400 unsigned short version;
401 unsigned int header_length;
402 unsigned char minimum_instruction_length;
403 unsigned char default_is_stmt;
405 unsigned char line_range;
406 unsigned char opcode_base;
408 /* standard_opcode_lengths[i] is the number of operands for the
409 standard opcode whose value is i. This means that
410 standard_opcode_lengths[0] is unused, and the last meaningful
411 element is standard_opcode_lengths[opcode_base - 1]. */
412 unsigned char *standard_opcode_lengths;
414 /* The include_directories table. NOTE! These strings are not
415 allocated with xmalloc; instead, they are pointers into
416 debug_line_buffer. If you try to free them, `free' will get
418 unsigned int num_include_dirs, include_dirs_size;
421 /* The file_names table. NOTE! These strings are not allocated
422 with xmalloc; instead, they are pointers into debug_line_buffer.
423 Don't try to free them directly. */
424 unsigned int num_file_names, file_names_size;
428 unsigned int dir_index;
429 unsigned int mod_time;
431 int included_p; /* Non-zero if referenced by the Line Number Program. */
432 struct symtab *symtab; /* The associated symbol table, if any. */
435 /* The start and end of the statement program following this
436 header. These point into dwarf2_per_objfile->line_buffer. */
437 gdb_byte *statement_program_start, *statement_program_end;
440 /* When we construct a partial symbol table entry we only
441 need this much information. */
442 struct partial_die_info
444 /* Offset of this DIE. */
447 /* DWARF-2 tag for this DIE. */
448 ENUM_BITFIELD(dwarf_tag) tag : 16;
450 /* Language code associated with this DIE. This is only used
451 for the compilation unit DIE. */
452 unsigned int language : 8;
454 /* Assorted flags describing the data found in this DIE. */
455 unsigned int has_children : 1;
456 unsigned int is_external : 1;
457 unsigned int is_declaration : 1;
458 unsigned int has_type : 1;
459 unsigned int has_specification : 1;
460 unsigned int has_stmt_list : 1;
461 unsigned int has_pc_info : 1;
463 /* Flag set if the SCOPE field of this structure has been
465 unsigned int scope_set : 1;
467 /* Flag set if the DIE has a byte_size attribute. */
468 unsigned int has_byte_size : 1;
470 /* The name of this DIE. Normally the value of DW_AT_name, but
471 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
476 /* The scope to prepend to our children. This is generally
477 allocated on the comp_unit_obstack, so will disappear
478 when this compilation unit leaves the cache. */
481 /* The location description associated with this DIE, if any. */
482 struct dwarf_block *locdesc;
484 /* If HAS_PC_INFO, the PC range associated with this DIE. */
488 /* Pointer into the info_buffer pointing at the target of
489 DW_AT_sibling, if any. */
492 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
493 DW_AT_specification (or DW_AT_abstract_origin or
495 unsigned int spec_offset;
497 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
498 unsigned int line_offset;
500 /* Pointers to this DIE's parent, first child, and next sibling,
502 struct partial_die_info *die_parent, *die_child, *die_sibling;
505 /* This data structure holds the information of an abbrev. */
508 unsigned int number; /* number identifying abbrev */
509 enum dwarf_tag tag; /* dwarf tag */
510 unsigned short has_children; /* boolean */
511 unsigned short num_attrs; /* number of attributes */
512 struct attr_abbrev *attrs; /* an array of attribute descriptions */
513 struct abbrev_info *next; /* next in chain */
518 enum dwarf_attribute name;
519 enum dwarf_form form;
522 /* This data structure holds a complete die structure. */
525 enum dwarf_tag tag; /* Tag indicating type of die */
526 unsigned int abbrev; /* Abbrev number */
527 unsigned int offset; /* Offset in .debug_info section */
528 unsigned int num_attrs; /* Number of attributes */
529 struct attribute *attrs; /* An array of attributes */
530 struct die_info *next_ref; /* Next die in ref hash table */
532 /* The dies in a compilation unit form an n-ary tree. PARENT
533 points to this die's parent; CHILD points to the first child of
534 this node; and all the children of a given node are chained
535 together via their SIBLING fields, terminated by a die whose
537 struct die_info *child; /* Its first child, if any. */
538 struct die_info *sibling; /* Its next sibling, if any. */
539 struct die_info *parent; /* Its parent, if any. */
541 struct type *type; /* Cached type information */
544 /* Attributes have a name and a value */
547 enum dwarf_attribute name;
548 enum dwarf_form form;
552 struct dwarf_block *blk;
560 struct function_range
563 CORE_ADDR lowpc, highpc;
565 struct function_range *next;
568 /* Get at parts of an attribute structure */
570 #define DW_STRING(attr) ((attr)->u.str)
571 #define DW_UNSND(attr) ((attr)->u.unsnd)
572 #define DW_BLOCK(attr) ((attr)->u.blk)
573 #define DW_SND(attr) ((attr)->u.snd)
574 #define DW_ADDR(attr) ((attr)->u.addr)
576 /* Blocks are a bunch of untyped bytes. */
583 #ifndef ATTR_ALLOC_CHUNK
584 #define ATTR_ALLOC_CHUNK 4
587 /* Allocate fields for structs, unions and enums in this size. */
588 #ifndef DW_FIELD_ALLOC_CHUNK
589 #define DW_FIELD_ALLOC_CHUNK 4
592 /* A zeroed version of a partial die for initialization purposes. */
593 static struct partial_die_info zeroed_partial_die;
595 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
596 but this would require a corresponding change in unpack_field_as_long
598 static int bits_per_byte = 8;
600 /* The routines that read and process dies for a C struct or C++ class
601 pass lists of data member fields and lists of member function fields
602 in an instance of a field_info structure, as defined below. */
605 /* List of data member and baseclasses fields. */
608 struct nextfield *next;
615 /* Number of fields. */
618 /* Number of baseclasses. */
621 /* Set if the accesibility of one of the fields is not public. */
622 int non_public_fields;
624 /* Member function fields array, entries are allocated in the order they
625 are encountered in the object file. */
628 struct nextfnfield *next;
629 struct fn_field fnfield;
633 /* Member function fieldlist array, contains name of possibly overloaded
634 member function, number of overloaded member functions and a pointer
635 to the head of the member function field chain. */
640 struct nextfnfield *head;
644 /* Number of entries in the fnfieldlists array. */
648 /* One item on the queue of compilation units to read in full symbols
650 struct dwarf2_queue_item
652 struct dwarf2_per_cu_data *per_cu;
653 struct dwarf2_queue_item *next;
656 /* The current queue. */
657 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
659 /* Loaded secondary compilation units are kept in memory until they
660 have not been referenced for the processing of this many
661 compilation units. Set this to zero to disable caching. Cache
662 sizes of up to at least twenty will improve startup time for
663 typical inter-CU-reference binaries, at an obvious memory cost. */
664 static int dwarf2_max_cache_age = 5;
666 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
667 struct cmd_list_element *c, const char *value)
669 fprintf_filtered (file, _("\
670 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
675 /* Various complaints about symbol reading that don't abort the process */
678 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
680 complaint (&symfile_complaints,
681 _("statement list doesn't fit in .debug_line section"));
685 dwarf2_debug_line_missing_file_complaint (void)
687 complaint (&symfile_complaints,
688 _(".debug_line section has line data without a file"));
692 dwarf2_complex_location_expr_complaint (void)
694 complaint (&symfile_complaints, _("location expression too complex"));
698 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
701 complaint (&symfile_complaints,
702 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
707 dwarf2_macros_too_long_complaint (void)
709 complaint (&symfile_complaints,
710 _("macro info runs off end of `.debug_macinfo' section"));
714 dwarf2_macro_malformed_definition_complaint (const char *arg1)
716 complaint (&symfile_complaints,
717 _("macro debug info contains a malformed macro definition:\n`%s'"),
722 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
724 complaint (&symfile_complaints,
725 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
728 /* local function prototypes */
730 static void dwarf2_locate_sections (bfd *, asection *, void *);
733 static void dwarf2_build_psymtabs_easy (struct objfile *, int);
736 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
739 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
740 struct partial_die_info *,
741 struct partial_symtab *);
743 static void dwarf2_build_psymtabs_hard (struct objfile *, int);
745 static void scan_partial_symbols (struct partial_die_info *,
746 CORE_ADDR *, CORE_ADDR *,
749 static void add_partial_symbol (struct partial_die_info *,
752 static int pdi_needs_namespace (enum dwarf_tag tag);
754 static void add_partial_namespace (struct partial_die_info *pdi,
755 CORE_ADDR *lowpc, CORE_ADDR *highpc,
756 struct dwarf2_cu *cu);
758 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
759 struct dwarf2_cu *cu);
761 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
764 struct dwarf2_cu *cu);
766 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
768 static void psymtab_to_symtab_1 (struct partial_symtab *);
770 gdb_byte *dwarf2_read_section (struct objfile *, asection *);
772 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
774 static void dwarf2_free_abbrev_table (void *);
776 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
779 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
782 static struct partial_die_info *load_partial_dies (bfd *, gdb_byte *, int,
785 static gdb_byte *read_partial_die (struct partial_die_info *,
786 struct abbrev_info *abbrev, unsigned int,
787 bfd *, gdb_byte *, struct dwarf2_cu *);
789 static struct partial_die_info *find_partial_die (unsigned long,
792 static void fixup_partial_die (struct partial_die_info *,
795 static gdb_byte *read_full_die (struct die_info **, bfd *, gdb_byte *,
796 struct dwarf2_cu *, int *);
798 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
799 bfd *, gdb_byte *, struct dwarf2_cu *);
801 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
802 bfd *, gdb_byte *, struct dwarf2_cu *);
804 static unsigned int read_1_byte (bfd *, gdb_byte *);
806 static int read_1_signed_byte (bfd *, gdb_byte *);
808 static unsigned int read_2_bytes (bfd *, gdb_byte *);
810 static unsigned int read_4_bytes (bfd *, gdb_byte *);
812 static unsigned long read_8_bytes (bfd *, gdb_byte *);
814 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
817 static LONGEST read_initial_length (bfd *, gdb_byte *,
818 struct comp_unit_head *, unsigned int *);
820 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
823 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
825 static char *read_string (bfd *, gdb_byte *, unsigned int *);
827 static char *read_indirect_string (bfd *, gdb_byte *,
828 const struct comp_unit_head *,
831 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
833 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
835 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
837 static void set_cu_language (unsigned int, struct dwarf2_cu *);
839 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
842 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
843 struct dwarf2_cu *cu);
845 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
847 static struct die_info *die_specification (struct die_info *die,
850 static void free_line_header (struct line_header *lh);
852 static void add_file_name (struct line_header *, char *, unsigned int,
853 unsigned int, unsigned int);
855 static struct line_header *(dwarf_decode_line_header
856 (unsigned int offset,
857 bfd *abfd, struct dwarf2_cu *cu));
859 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
860 struct dwarf2_cu *, struct partial_symtab *);
862 static void dwarf2_start_subfile (char *, char *, char *);
864 static struct symbol *new_symbol (struct die_info *, struct type *,
867 static void dwarf2_const_value (struct attribute *, struct symbol *,
870 static void dwarf2_const_value_data (struct attribute *attr,
874 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
876 static struct type *die_containing_type (struct die_info *,
879 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
881 static void read_type_die (struct die_info *, struct dwarf2_cu *);
883 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
885 static char *typename_concat (struct obstack *,
890 static void read_typedef (struct die_info *, struct dwarf2_cu *);
892 static void read_base_type (struct die_info *, struct dwarf2_cu *);
894 static void read_subrange_type (struct die_info *die, struct dwarf2_cu *cu);
896 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
898 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
900 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
902 static int dwarf2_get_pc_bounds (struct die_info *,
903 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *);
905 static void get_scope_pc_bounds (struct die_info *,
906 CORE_ADDR *, CORE_ADDR *,
909 static void dwarf2_add_field (struct field_info *, struct die_info *,
912 static void dwarf2_attach_fields_to_type (struct field_info *,
913 struct type *, struct dwarf2_cu *);
915 static void dwarf2_add_member_fn (struct field_info *,
916 struct die_info *, struct type *,
919 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
920 struct type *, struct dwarf2_cu *);
922 static void read_structure_type (struct die_info *, struct dwarf2_cu *);
924 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
926 static char *determine_class_name (struct die_info *die, struct dwarf2_cu *cu);
928 static void read_common_block (struct die_info *, struct dwarf2_cu *);
930 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
932 static const char *namespace_name (struct die_info *die,
933 int *is_anonymous, struct dwarf2_cu *);
935 static void read_enumeration_type (struct die_info *, struct dwarf2_cu *);
937 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
939 static struct type *dwarf_base_type (int, int, struct dwarf2_cu *);
941 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
943 static void read_array_type (struct die_info *, struct dwarf2_cu *);
945 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
948 static void read_tag_pointer_type (struct die_info *, struct dwarf2_cu *);
950 static void read_tag_ptr_to_member_type (struct die_info *,
953 static void read_tag_reference_type (struct die_info *, struct dwarf2_cu *);
955 static void read_tag_const_type (struct die_info *, struct dwarf2_cu *);
957 static void read_tag_volatile_type (struct die_info *, struct dwarf2_cu *);
959 static void read_tag_string_type (struct die_info *, struct dwarf2_cu *);
961 static void read_subroutine_type (struct die_info *, struct dwarf2_cu *);
963 static struct die_info *read_comp_unit (gdb_byte *, bfd *, struct dwarf2_cu *);
965 static struct die_info *read_die_and_children (gdb_byte *info_ptr, bfd *abfd,
967 gdb_byte **new_info_ptr,
968 struct die_info *parent);
970 static struct die_info *read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd,
972 gdb_byte **new_info_ptr,
973 struct die_info *parent);
975 static void free_die_list (struct die_info *);
977 static void process_die (struct die_info *, struct dwarf2_cu *);
979 static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
981 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
983 static struct die_info *dwarf2_extension (struct die_info *die,
986 static char *dwarf_tag_name (unsigned int);
988 static char *dwarf_attr_name (unsigned int);
990 static char *dwarf_form_name (unsigned int);
992 static char *dwarf_stack_op_name (unsigned int);
994 static char *dwarf_bool_name (unsigned int);
996 static char *dwarf_type_encoding_name (unsigned int);
999 static char *dwarf_cfi_name (unsigned int);
1001 struct die_info *copy_die (struct die_info *);
1004 static struct die_info *sibling_die (struct die_info *);
1006 static void dump_die (struct die_info *);
1008 static void dump_die_list (struct die_info *);
1010 static void store_in_ref_table (unsigned int, struct die_info *,
1011 struct dwarf2_cu *);
1013 static unsigned int dwarf2_get_ref_die_offset (struct attribute *,
1014 struct dwarf2_cu *);
1016 static int dwarf2_get_attr_constant_value (struct attribute *, int);
1018 static struct die_info *follow_die_ref (struct die_info *,
1020 struct dwarf2_cu *);
1022 static struct type *dwarf2_fundamental_type (struct objfile *, int,
1023 struct dwarf2_cu *);
1025 /* memory allocation interface */
1027 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1029 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1031 static struct die_info *dwarf_alloc_die (void);
1033 static void initialize_cu_func_list (struct dwarf2_cu *);
1035 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1036 struct dwarf2_cu *);
1038 static void dwarf_decode_macros (struct line_header *, unsigned int,
1039 char *, bfd *, struct dwarf2_cu *);
1041 static int attr_form_is_block (struct attribute *);
1043 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1045 struct dwarf2_cu *cu);
1047 static gdb_byte *skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev,
1048 struct dwarf2_cu *cu);
1050 static void free_stack_comp_unit (void *);
1052 static hashval_t partial_die_hash (const void *item);
1054 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1056 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1057 (unsigned long offset, struct objfile *objfile);
1059 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1060 (unsigned long offset, struct objfile *objfile);
1062 static void free_one_comp_unit (void *);
1064 static void free_cached_comp_units (void *);
1066 static void age_cached_comp_units (void);
1068 static void free_one_cached_comp_unit (void *);
1070 static void set_die_type (struct die_info *, struct type *,
1071 struct dwarf2_cu *);
1073 static void reset_die_and_siblings_types (struct die_info *,
1074 struct dwarf2_cu *);
1076 static void create_all_comp_units (struct objfile *);
1078 static struct dwarf2_cu *load_full_comp_unit (struct dwarf2_per_cu_data *,
1081 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1083 static void dwarf2_add_dependence (struct dwarf2_cu *,
1084 struct dwarf2_per_cu_data *);
1086 static void dwarf2_mark (struct dwarf2_cu *);
1088 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1090 static void read_set_type (struct die_info *, struct dwarf2_cu *);
1093 /* Try to locate the sections we need for DWARF 2 debugging
1094 information and return true if we have enough to do something. */
1097 dwarf2_has_info (struct objfile *objfile)
1099 struct dwarf2_per_objfile *data;
1101 /* Initialize per-objfile state. */
1102 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1103 memset (data, 0, sizeof (*data));
1104 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1105 dwarf2_per_objfile = data;
1107 dwarf_info_section = 0;
1108 dwarf_abbrev_section = 0;
1109 dwarf_line_section = 0;
1110 dwarf_str_section = 0;
1111 dwarf_macinfo_section = 0;
1112 dwarf_frame_section = 0;
1113 dwarf_eh_frame_section = 0;
1114 dwarf_ranges_section = 0;
1115 dwarf_loc_section = 0;
1117 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1118 return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
1121 /* This function is mapped across the sections and remembers the
1122 offset and size of each of the debugging sections we are interested
1126 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1128 if (strcmp (sectp->name, INFO_SECTION) == 0)
1130 dwarf2_per_objfile->info_size = bfd_get_section_size (sectp);
1131 dwarf_info_section = sectp;
1133 else if (strcmp (sectp->name, ABBREV_SECTION) == 0)
1135 dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp);
1136 dwarf_abbrev_section = sectp;
1138 else if (strcmp (sectp->name, LINE_SECTION) == 0)
1140 dwarf2_per_objfile->line_size = bfd_get_section_size (sectp);
1141 dwarf_line_section = sectp;
1143 else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0)
1145 dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp);
1146 dwarf_pubnames_section = sectp;
1148 else if (strcmp (sectp->name, ARANGES_SECTION) == 0)
1150 dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp);
1151 dwarf_aranges_section = sectp;
1153 else if (strcmp (sectp->name, LOC_SECTION) == 0)
1155 dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp);
1156 dwarf_loc_section = sectp;
1158 else if (strcmp (sectp->name, MACINFO_SECTION) == 0)
1160 dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp);
1161 dwarf_macinfo_section = sectp;
1163 else if (strcmp (sectp->name, STR_SECTION) == 0)
1165 dwarf2_per_objfile->str_size = bfd_get_section_size (sectp);
1166 dwarf_str_section = sectp;
1168 else if (strcmp (sectp->name, FRAME_SECTION) == 0)
1170 dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp);
1171 dwarf_frame_section = sectp;
1173 else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0)
1175 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1176 if (aflag & SEC_HAS_CONTENTS)
1178 dwarf2_per_objfile->eh_frame_size = bfd_get_section_size (sectp);
1179 dwarf_eh_frame_section = sectp;
1182 else if (strcmp (sectp->name, RANGES_SECTION) == 0)
1184 dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp);
1185 dwarf_ranges_section = sectp;
1188 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1189 && bfd_section_vma (abfd, sectp) == 0)
1190 dwarf2_per_objfile->has_section_at_zero = 1;
1193 /* Build a partial symbol table. */
1196 dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
1198 /* We definitely need the .debug_info and .debug_abbrev sections */
1200 dwarf2_per_objfile->info_buffer = dwarf2_read_section (objfile, dwarf_info_section);
1201 dwarf2_per_objfile->abbrev_buffer = dwarf2_read_section (objfile, dwarf_abbrev_section);
1203 if (dwarf_line_section)
1204 dwarf2_per_objfile->line_buffer = dwarf2_read_section (objfile, dwarf_line_section);
1206 dwarf2_per_objfile->line_buffer = NULL;
1208 if (dwarf_str_section)
1209 dwarf2_per_objfile->str_buffer = dwarf2_read_section (objfile, dwarf_str_section);
1211 dwarf2_per_objfile->str_buffer = NULL;
1213 if (dwarf_macinfo_section)
1214 dwarf2_per_objfile->macinfo_buffer = dwarf2_read_section (objfile,
1215 dwarf_macinfo_section);
1217 dwarf2_per_objfile->macinfo_buffer = NULL;
1219 if (dwarf_ranges_section)
1220 dwarf2_per_objfile->ranges_buffer = dwarf2_read_section (objfile, dwarf_ranges_section);
1222 dwarf2_per_objfile->ranges_buffer = NULL;
1224 if (dwarf_loc_section)
1225 dwarf2_per_objfile->loc_buffer = dwarf2_read_section (objfile, dwarf_loc_section);
1227 dwarf2_per_objfile->loc_buffer = NULL;
1230 || (objfile->global_psymbols.size == 0
1231 && objfile->static_psymbols.size == 0))
1233 init_psymbol_list (objfile, 1024);
1237 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1239 /* Things are significantly easier if we have .debug_aranges and
1240 .debug_pubnames sections */
1242 dwarf2_build_psymtabs_easy (objfile, mainline);
1246 /* only test this case for now */
1248 /* In this case we have to work a bit harder */
1249 dwarf2_build_psymtabs_hard (objfile, mainline);
1254 /* Build the partial symbol table from the information in the
1255 .debug_pubnames and .debug_aranges sections. */
1258 dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
1260 bfd *abfd = objfile->obfd;
1261 char *aranges_buffer, *pubnames_buffer;
1262 char *aranges_ptr, *pubnames_ptr;
1263 unsigned int entry_length, version, info_offset, info_size;
1265 pubnames_buffer = dwarf2_read_section (objfile,
1266 dwarf_pubnames_section);
1267 pubnames_ptr = pubnames_buffer;
1268 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames_size)
1270 struct comp_unit_head cu_header;
1271 unsigned int bytes_read;
1273 entry_length = read_initial_length (abfd, pubnames_ptr, &cu_header,
1275 pubnames_ptr += bytes_read;
1276 version = read_1_byte (abfd, pubnames_ptr);
1278 info_offset = read_4_bytes (abfd, pubnames_ptr);
1280 info_size = read_4_bytes (abfd, pubnames_ptr);
1284 aranges_buffer = dwarf2_read_section (objfile,
1285 dwarf_aranges_section);
1290 /* Read in the comp unit header information from the debug_info at
1294 read_comp_unit_head (struct comp_unit_head *cu_header,
1295 gdb_byte *info_ptr, bfd *abfd)
1298 unsigned int bytes_read;
1299 cu_header->length = read_initial_length (abfd, info_ptr, cu_header,
1301 info_ptr += bytes_read;
1302 cu_header->version = read_2_bytes (abfd, info_ptr);
1304 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1306 info_ptr += bytes_read;
1307 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1309 signed_addr = bfd_get_sign_extend_vma (abfd);
1310 if (signed_addr < 0)
1311 internal_error (__FILE__, __LINE__,
1312 _("read_comp_unit_head: dwarf from non elf file"));
1313 cu_header->signed_addr_p = signed_addr;
1318 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1321 gdb_byte *beg_of_comp_unit = info_ptr;
1323 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1325 if (header->version != 2 && header->version != 3)
1326 error (_("Dwarf Error: wrong version in compilation unit header "
1327 "(is %d, should be %d) [in module %s]"), header->version,
1328 2, bfd_get_filename (abfd));
1330 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev_size)
1331 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1332 "(offset 0x%lx + 6) [in module %s]"),
1333 (long) header->abbrev_offset,
1334 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1335 bfd_get_filename (abfd));
1337 if (beg_of_comp_unit + header->length + header->initial_length_size
1338 > dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
1339 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1340 "(offset 0x%lx + 0) [in module %s]"),
1341 (long) header->length,
1342 (long) (beg_of_comp_unit - dwarf2_per_objfile->info_buffer),
1343 bfd_get_filename (abfd));
1348 /* Allocate a new partial symtab for file named NAME and mark this new
1349 partial symtab as being an include of PST. */
1352 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1353 struct objfile *objfile)
1355 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1357 subpst->section_offsets = pst->section_offsets;
1358 subpst->textlow = 0;
1359 subpst->texthigh = 0;
1361 subpst->dependencies = (struct partial_symtab **)
1362 obstack_alloc (&objfile->objfile_obstack,
1363 sizeof (struct partial_symtab *));
1364 subpst->dependencies[0] = pst;
1365 subpst->number_of_dependencies = 1;
1367 subpst->globals_offset = 0;
1368 subpst->n_global_syms = 0;
1369 subpst->statics_offset = 0;
1370 subpst->n_static_syms = 0;
1371 subpst->symtab = NULL;
1372 subpst->read_symtab = pst->read_symtab;
1375 /* No private part is necessary for include psymtabs. This property
1376 can be used to differentiate between such include psymtabs and
1377 the regular ones. */
1378 subpst->read_symtab_private = NULL;
1381 /* Read the Line Number Program data and extract the list of files
1382 included by the source file represented by PST. Build an include
1383 partial symtab for each of these included files.
1385 This procedure assumes that there *is* a Line Number Program in
1386 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1387 before calling this procedure. */
1390 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1391 struct partial_die_info *pdi,
1392 struct partial_symtab *pst)
1394 struct objfile *objfile = cu->objfile;
1395 bfd *abfd = objfile->obfd;
1396 struct line_header *lh;
1398 lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu);
1400 return; /* No linetable, so no includes. */
1402 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1404 free_line_header (lh);
1408 /* Build the partial symbol table by doing a quick pass through the
1409 .debug_info and .debug_abbrev sections. */
1412 dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
1414 /* Instead of reading this into a big buffer, we should probably use
1415 mmap() on architectures that support it. (FIXME) */
1416 bfd *abfd = objfile->obfd;
1418 gdb_byte *beg_of_comp_unit;
1419 struct partial_die_info comp_unit_die;
1420 struct partial_symtab *pst;
1421 struct cleanup *back_to;
1422 CORE_ADDR lowpc, highpc, baseaddr;
1424 info_ptr = dwarf2_per_objfile->info_buffer;
1426 /* Any cached compilation units will be linked by the per-objfile
1427 read_in_chain. Make sure to free them when we're done. */
1428 back_to = make_cleanup (free_cached_comp_units, NULL);
1430 create_all_comp_units (objfile);
1432 /* Since the objects we're extracting from .debug_info vary in
1433 length, only the individual functions to extract them (like
1434 read_comp_unit_head and load_partial_die) can really know whether
1435 the buffer is large enough to hold another complete object.
1437 At the moment, they don't actually check that. If .debug_info
1438 holds just one extra byte after the last compilation unit's dies,
1439 then read_comp_unit_head will happily read off the end of the
1440 buffer. read_partial_die is similarly casual. Those functions
1443 For this loop condition, simply checking whether there's any data
1444 left at all should be sufficient. */
1445 while (info_ptr < (dwarf2_per_objfile->info_buffer
1446 + dwarf2_per_objfile->info_size))
1448 struct cleanup *back_to_inner;
1449 struct dwarf2_cu cu;
1450 struct abbrev_info *abbrev;
1451 unsigned int bytes_read;
1452 struct dwarf2_per_cu_data *this_cu;
1454 beg_of_comp_unit = info_ptr;
1456 memset (&cu, 0, sizeof (cu));
1458 obstack_init (&cu.comp_unit_obstack);
1460 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1462 cu.objfile = objfile;
1463 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr, abfd);
1465 /* Complete the cu_header */
1466 cu.header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1467 cu.header.first_die_ptr = info_ptr;
1468 cu.header.cu_head_ptr = beg_of_comp_unit;
1470 cu.list_in_scope = &file_symbols;
1472 /* Read the abbrevs for this compilation unit into a table */
1473 dwarf2_read_abbrevs (abfd, &cu);
1474 make_cleanup (dwarf2_free_abbrev_table, &cu);
1476 this_cu = dwarf2_find_comp_unit (cu.header.offset, objfile);
1478 /* Read the compilation unit die */
1479 abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu);
1480 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
1481 abfd, info_ptr, &cu);
1483 if (comp_unit_die.tag == DW_TAG_partial_unit)
1485 info_ptr = (beg_of_comp_unit + cu.header.length
1486 + cu.header.initial_length_size);
1487 do_cleanups (back_to_inner);
1491 /* Set the language we're debugging */
1492 set_cu_language (comp_unit_die.language, &cu);
1494 /* Allocate a new partial symbol table structure */
1495 pst = start_psymtab_common (objfile, objfile->section_offsets,
1496 comp_unit_die.name ? comp_unit_die.name : "",
1497 comp_unit_die.lowpc,
1498 objfile->global_psymbols.next,
1499 objfile->static_psymbols.next);
1501 if (comp_unit_die.dirname)
1502 pst->dirname = xstrdup (comp_unit_die.dirname);
1504 pst->read_symtab_private = (char *) this_cu;
1506 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1508 /* Store the function that reads in the rest of the symbol table */
1509 pst->read_symtab = dwarf2_psymtab_to_symtab;
1511 /* If this compilation unit was already read in, free the
1512 cached copy in order to read it in again. This is
1513 necessary because we skipped some symbols when we first
1514 read in the compilation unit (see load_partial_dies).
1515 This problem could be avoided, but the benefit is
1517 if (this_cu->cu != NULL)
1518 free_one_cached_comp_unit (this_cu->cu);
1520 cu.per_cu = this_cu;
1522 /* Note that this is a pointer to our stack frame, being
1523 added to a global data structure. It will be cleaned up
1524 in free_stack_comp_unit when we finish with this
1525 compilation unit. */
1528 this_cu->psymtab = pst;
1530 /* Check if comp unit has_children.
1531 If so, read the rest of the partial symbols from this comp unit.
1532 If not, there's no more debug_info for this comp unit. */
1533 if (comp_unit_die.has_children)
1535 struct partial_die_info *first_die;
1537 lowpc = ((CORE_ADDR) -1);
1538 highpc = ((CORE_ADDR) 0);
1540 first_die = load_partial_dies (abfd, info_ptr, 1, &cu);
1542 scan_partial_symbols (first_die, &lowpc, &highpc, &cu);
1544 /* If we didn't find a lowpc, set it to highpc to avoid
1545 complaints from `maint check'. */
1546 if (lowpc == ((CORE_ADDR) -1))
1549 /* If the compilation unit didn't have an explicit address range,
1550 then use the information extracted from its child dies. */
1551 if (! comp_unit_die.has_pc_info)
1553 comp_unit_die.lowpc = lowpc;
1554 comp_unit_die.highpc = highpc;
1557 pst->textlow = comp_unit_die.lowpc + baseaddr;
1558 pst->texthigh = comp_unit_die.highpc + baseaddr;
1560 pst->n_global_syms = objfile->global_psymbols.next -
1561 (objfile->global_psymbols.list + pst->globals_offset);
1562 pst->n_static_syms = objfile->static_psymbols.next -
1563 (objfile->static_psymbols.list + pst->statics_offset);
1564 sort_pst_symbols (pst);
1566 /* If there is already a psymtab or symtab for a file of this
1567 name, remove it. (If there is a symtab, more drastic things
1568 also happen.) This happens in VxWorks. */
1569 free_named_symtabs (pst->filename);
1571 info_ptr = beg_of_comp_unit + cu.header.length
1572 + cu.header.initial_length_size;
1574 if (comp_unit_die.has_stmt_list)
1576 /* Get the list of files included in the current compilation unit,
1577 and build a psymtab for each of them. */
1578 dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst);
1581 do_cleanups (back_to_inner);
1583 do_cleanups (back_to);
1586 /* Load the DIEs for a secondary CU into memory. */
1589 load_comp_unit (struct dwarf2_per_cu_data *this_cu, struct objfile *objfile)
1591 bfd *abfd = objfile->obfd;
1592 gdb_byte *info_ptr, *beg_of_comp_unit;
1593 struct partial_die_info comp_unit_die;
1594 struct dwarf2_cu *cu;
1595 struct abbrev_info *abbrev;
1596 unsigned int bytes_read;
1597 struct cleanup *back_to;
1599 info_ptr = dwarf2_per_objfile->info_buffer + this_cu->offset;
1600 beg_of_comp_unit = info_ptr;
1602 cu = xmalloc (sizeof (struct dwarf2_cu));
1603 memset (cu, 0, sizeof (struct dwarf2_cu));
1605 obstack_init (&cu->comp_unit_obstack);
1607 cu->objfile = objfile;
1608 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr, abfd);
1610 /* Complete the cu_header. */
1611 cu->header.offset = beg_of_comp_unit - dwarf2_per_objfile->info_buffer;
1612 cu->header.first_die_ptr = info_ptr;
1613 cu->header.cu_head_ptr = beg_of_comp_unit;
1615 /* Read the abbrevs for this compilation unit into a table. */
1616 dwarf2_read_abbrevs (abfd, cu);
1617 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
1619 /* Read the compilation unit die. */
1620 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
1621 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
1622 abfd, info_ptr, cu);
1624 /* Set the language we're debugging. */
1625 set_cu_language (comp_unit_die.language, cu);
1627 /* Link this compilation unit into the compilation unit tree. */
1629 cu->per_cu = this_cu;
1631 /* Check if comp unit has_children.
1632 If so, read the rest of the partial symbols from this comp unit.
1633 If not, there's no more debug_info for this comp unit. */
1634 if (comp_unit_die.has_children)
1635 load_partial_dies (abfd, info_ptr, 0, cu);
1637 do_cleanups (back_to);
1640 /* Create a list of all compilation units in OBJFILE. We do this only
1641 if an inter-comp-unit reference is found; presumably if there is one,
1642 there will be many, and one will occur early in the .debug_info section.
1643 So there's no point in building this list incrementally. */
1646 create_all_comp_units (struct objfile *objfile)
1650 struct dwarf2_per_cu_data **all_comp_units;
1651 gdb_byte *info_ptr = dwarf2_per_objfile->info_buffer;
1655 all_comp_units = xmalloc (n_allocated
1656 * sizeof (struct dwarf2_per_cu_data *));
1658 while (info_ptr < dwarf2_per_objfile->info_buffer + dwarf2_per_objfile->info_size)
1660 struct comp_unit_head cu_header;
1661 gdb_byte *beg_of_comp_unit;
1662 struct dwarf2_per_cu_data *this_cu;
1663 unsigned long offset;
1664 unsigned int bytes_read;
1666 offset = info_ptr - dwarf2_per_objfile->info_buffer;
1668 /* Read just enough information to find out where the next
1669 compilation unit is. */
1670 cu_header.initial_length_size = 0;
1671 cu_header.length = read_initial_length (objfile->obfd, info_ptr,
1672 &cu_header, &bytes_read);
1674 /* Save the compilation unit for later lookup. */
1675 this_cu = obstack_alloc (&objfile->objfile_obstack,
1676 sizeof (struct dwarf2_per_cu_data));
1677 memset (this_cu, 0, sizeof (*this_cu));
1678 this_cu->offset = offset;
1679 this_cu->length = cu_header.length + cu_header.initial_length_size;
1681 if (n_comp_units == n_allocated)
1684 all_comp_units = xrealloc (all_comp_units,
1686 * sizeof (struct dwarf2_per_cu_data *));
1688 all_comp_units[n_comp_units++] = this_cu;
1690 info_ptr = info_ptr + this_cu->length;
1693 dwarf2_per_objfile->all_comp_units
1694 = obstack_alloc (&objfile->objfile_obstack,
1695 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
1696 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
1697 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
1698 xfree (all_comp_units);
1699 dwarf2_per_objfile->n_comp_units = n_comp_units;
1702 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1703 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1707 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
1708 CORE_ADDR *highpc, struct dwarf2_cu *cu)
1710 struct objfile *objfile = cu->objfile;
1711 bfd *abfd = objfile->obfd;
1712 struct partial_die_info *pdi;
1714 /* Now, march along the PDI's, descending into ones which have
1715 interesting children but skipping the children of the other ones,
1716 until we reach the end of the compilation unit. */
1722 fixup_partial_die (pdi, cu);
1724 /* Anonymous namespaces have no name but have interesting
1725 children, so we need to look at them. Ditto for anonymous
1728 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
1729 || pdi->tag == DW_TAG_enumeration_type)
1733 case DW_TAG_subprogram:
1734 if (pdi->has_pc_info)
1736 if (pdi->lowpc < *lowpc)
1738 *lowpc = pdi->lowpc;
1740 if (pdi->highpc > *highpc)
1742 *highpc = pdi->highpc;
1744 if (!pdi->is_declaration)
1746 add_partial_symbol (pdi, cu);
1750 case DW_TAG_variable:
1751 case DW_TAG_typedef:
1752 case DW_TAG_union_type:
1753 if (!pdi->is_declaration)
1755 add_partial_symbol (pdi, cu);
1758 case DW_TAG_class_type:
1759 case DW_TAG_structure_type:
1760 if (!pdi->is_declaration)
1762 add_partial_symbol (pdi, cu);
1765 case DW_TAG_enumeration_type:
1766 if (!pdi->is_declaration)
1767 add_partial_enumeration (pdi, cu);
1769 case DW_TAG_base_type:
1770 case DW_TAG_subrange_type:
1771 /* File scope base type definitions are added to the partial
1773 add_partial_symbol (pdi, cu);
1775 case DW_TAG_namespace:
1776 add_partial_namespace (pdi, lowpc, highpc, cu);
1783 /* If the die has a sibling, skip to the sibling. */
1785 pdi = pdi->die_sibling;
1789 /* Functions used to compute the fully scoped name of a partial DIE.
1791 Normally, this is simple. For C++, the parent DIE's fully scoped
1792 name is concatenated with "::" and the partial DIE's name. For
1793 Java, the same thing occurs except that "." is used instead of "::".
1794 Enumerators are an exception; they use the scope of their parent
1795 enumeration type, i.e. the name of the enumeration type is not
1796 prepended to the enumerator.
1798 There are two complexities. One is DW_AT_specification; in this
1799 case "parent" means the parent of the target of the specification,
1800 instead of the direct parent of the DIE. The other is compilers
1801 which do not emit DW_TAG_namespace; in this case we try to guess
1802 the fully qualified name of structure types from their members'
1803 linkage names. This must be done using the DIE's children rather
1804 than the children of any DW_AT_specification target. We only need
1805 to do this for structures at the top level, i.e. if the target of
1806 any DW_AT_specification (if any; otherwise the DIE itself) does not
1809 /* Compute the scope prefix associated with PDI's parent, in
1810 compilation unit CU. The result will be allocated on CU's
1811 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1812 field. NULL is returned if no prefix is necessary. */
1814 partial_die_parent_scope (struct partial_die_info *pdi,
1815 struct dwarf2_cu *cu)
1817 char *grandparent_scope;
1818 struct partial_die_info *parent, *real_pdi;
1820 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1821 then this means the parent of the specification DIE. */
1824 while (real_pdi->has_specification)
1825 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
1827 parent = real_pdi->die_parent;
1831 if (parent->scope_set)
1832 return parent->scope;
1834 fixup_partial_die (parent, cu);
1836 grandparent_scope = partial_die_parent_scope (parent, cu);
1838 if (parent->tag == DW_TAG_namespace
1839 || parent->tag == DW_TAG_structure_type
1840 || parent->tag == DW_TAG_class_type
1841 || parent->tag == DW_TAG_union_type)
1843 if (grandparent_scope == NULL)
1844 parent->scope = parent->name;
1846 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
1849 else if (parent->tag == DW_TAG_enumeration_type)
1850 /* Enumerators should not get the name of the enumeration as a prefix. */
1851 parent->scope = grandparent_scope;
1854 /* FIXME drow/2004-04-01: What should we be doing with
1855 function-local names? For partial symbols, we should probably be
1857 complaint (&symfile_complaints,
1858 _("unhandled containing DIE tag %d for DIE at %d"),
1859 parent->tag, pdi->offset);
1860 parent->scope = grandparent_scope;
1863 parent->scope_set = 1;
1864 return parent->scope;
1867 /* Return the fully scoped name associated with PDI, from compilation unit
1868 CU. The result will be allocated with malloc. */
1870 partial_die_full_name (struct partial_die_info *pdi,
1871 struct dwarf2_cu *cu)
1875 parent_scope = partial_die_parent_scope (pdi, cu);
1876 if (parent_scope == NULL)
1879 return typename_concat (NULL, parent_scope, pdi->name, cu);
1883 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
1885 struct objfile *objfile = cu->objfile;
1887 char *actual_name = NULL;
1888 const char *my_prefix;
1889 const struct partial_symbol *psym = NULL;
1891 int built_actual_name = 0;
1893 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1895 if (pdi_needs_namespace (pdi->tag))
1897 actual_name = partial_die_full_name (pdi, cu);
1899 built_actual_name = 1;
1902 if (actual_name == NULL)
1903 actual_name = pdi->name;
1907 case DW_TAG_subprogram:
1908 if (pdi->is_external)
1910 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1911 mst_text, objfile); */
1912 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1913 VAR_DOMAIN, LOC_BLOCK,
1914 &objfile->global_psymbols,
1915 0, pdi->lowpc + baseaddr,
1916 cu->language, objfile);
1920 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1921 mst_file_text, objfile); */
1922 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1923 VAR_DOMAIN, LOC_BLOCK,
1924 &objfile->static_psymbols,
1925 0, pdi->lowpc + baseaddr,
1926 cu->language, objfile);
1929 case DW_TAG_variable:
1930 if (pdi->is_external)
1933 Don't enter into the minimal symbol tables as there is
1934 a minimal symbol table entry from the ELF symbols already.
1935 Enter into partial symbol table if it has a location
1936 descriptor or a type.
1937 If the location descriptor is missing, new_symbol will create
1938 a LOC_UNRESOLVED symbol, the address of the variable will then
1939 be determined from the minimal symbol table whenever the variable
1941 The address for the partial symbol table entry is not
1942 used by GDB, but it comes in handy for debugging partial symbol
1946 addr = decode_locdesc (pdi->locdesc, cu);
1947 if (pdi->locdesc || pdi->has_type)
1948 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1949 VAR_DOMAIN, LOC_STATIC,
1950 &objfile->global_psymbols,
1952 cu->language, objfile);
1956 /* Static Variable. Skip symbols without location descriptors. */
1957 if (pdi->locdesc == NULL)
1959 if (built_actual_name)
1960 xfree (actual_name);
1963 addr = decode_locdesc (pdi->locdesc, cu);
1964 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1965 mst_file_data, objfile); */
1966 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
1967 VAR_DOMAIN, LOC_STATIC,
1968 &objfile->static_psymbols,
1970 cu->language, objfile);
1973 case DW_TAG_typedef:
1974 case DW_TAG_base_type:
1975 case DW_TAG_subrange_type:
1976 add_psymbol_to_list (actual_name, strlen (actual_name),
1977 VAR_DOMAIN, LOC_TYPEDEF,
1978 &objfile->static_psymbols,
1979 0, (CORE_ADDR) 0, cu->language, objfile);
1981 case DW_TAG_namespace:
1982 add_psymbol_to_list (actual_name, strlen (actual_name),
1983 VAR_DOMAIN, LOC_TYPEDEF,
1984 &objfile->global_psymbols,
1985 0, (CORE_ADDR) 0, cu->language, objfile);
1987 case DW_TAG_class_type:
1988 case DW_TAG_structure_type:
1989 case DW_TAG_union_type:
1990 case DW_TAG_enumeration_type:
1991 /* Skip external references. The DWARF standard says in the section
1992 about "Structure, Union, and Class Type Entries": "An incomplete
1993 structure, union or class type is represented by a structure,
1994 union or class entry that does not have a byte size attribute
1995 and that has a DW_AT_declaration attribute." */
1996 if (!pdi->has_byte_size && pdi->is_declaration)
1998 if (built_actual_name)
1999 xfree (actual_name);
2003 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2004 static vs. global. */
2005 add_psymbol_to_list (actual_name, strlen (actual_name),
2006 STRUCT_DOMAIN, LOC_TYPEDEF,
2007 (cu->language == language_cplus
2008 || cu->language == language_java)
2009 ? &objfile->global_psymbols
2010 : &objfile->static_psymbols,
2011 0, (CORE_ADDR) 0, cu->language, objfile);
2013 if (cu->language == language_cplus
2014 || cu->language == language_java
2015 || cu->language == language_ada)
2017 /* For C++ and Java, these implicitly act as typedefs as well. */
2018 add_psymbol_to_list (actual_name, strlen (actual_name),
2019 VAR_DOMAIN, LOC_TYPEDEF,
2020 &objfile->global_psymbols,
2021 0, (CORE_ADDR) 0, cu->language, objfile);
2024 case DW_TAG_enumerator:
2025 add_psymbol_to_list (actual_name, strlen (actual_name),
2026 VAR_DOMAIN, LOC_CONST,
2027 (cu->language == language_cplus
2028 || cu->language == language_java)
2029 ? &objfile->global_psymbols
2030 : &objfile->static_psymbols,
2031 0, (CORE_ADDR) 0, cu->language, objfile);
2037 /* Check to see if we should scan the name for possible namespace
2038 info. Only do this if this is C++, if we don't have namespace
2039 debugging info in the file, if the psym is of an appropriate type
2040 (otherwise we'll have psym == NULL), and if we actually had a
2041 mangled name to begin with. */
2043 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2044 cases which do not set PSYM above? */
2046 if (cu->language == language_cplus
2047 && cu->has_namespace_info == 0
2049 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
2050 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
2053 if (built_actual_name)
2054 xfree (actual_name);
2057 /* Determine whether a die of type TAG living in a C++ class or
2058 namespace needs to have the name of the scope prepended to the
2059 name listed in the die. */
2062 pdi_needs_namespace (enum dwarf_tag tag)
2066 case DW_TAG_namespace:
2067 case DW_TAG_typedef:
2068 case DW_TAG_class_type:
2069 case DW_TAG_structure_type:
2070 case DW_TAG_union_type:
2071 case DW_TAG_enumeration_type:
2072 case DW_TAG_enumerator:
2079 /* Read a partial die corresponding to a namespace; also, add a symbol
2080 corresponding to that namespace to the symbol table. NAMESPACE is
2081 the name of the enclosing namespace. */
2084 add_partial_namespace (struct partial_die_info *pdi,
2085 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2086 struct dwarf2_cu *cu)
2088 struct objfile *objfile = cu->objfile;
2090 /* Add a symbol for the namespace. */
2092 add_partial_symbol (pdi, cu);
2094 /* Now scan partial symbols in that namespace. */
2096 if (pdi->has_children)
2097 scan_partial_symbols (pdi->die_child, lowpc, highpc, cu);
2100 /* See if we can figure out if the class lives in a namespace. We do
2101 this by looking for a member function; its demangled name will
2102 contain namespace info, if there is any. */
2105 guess_structure_name (struct partial_die_info *struct_pdi,
2106 struct dwarf2_cu *cu)
2108 if ((cu->language == language_cplus
2109 || cu->language == language_java)
2110 && cu->has_namespace_info == 0
2111 && struct_pdi->has_children)
2113 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2114 what template types look like, because the demangler
2115 frequently doesn't give the same name as the debug info. We
2116 could fix this by only using the demangled name to get the
2117 prefix (but see comment in read_structure_type). */
2119 struct partial_die_info *child_pdi = struct_pdi->die_child;
2120 struct partial_die_info *real_pdi;
2122 /* If this DIE (this DIE's specification, if any) has a parent, then
2123 we should not do this. We'll prepend the parent's fully qualified
2124 name when we create the partial symbol. */
2126 real_pdi = struct_pdi;
2127 while (real_pdi->has_specification)
2128 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2130 if (real_pdi->die_parent != NULL)
2133 while (child_pdi != NULL)
2135 if (child_pdi->tag == DW_TAG_subprogram)
2137 char *actual_class_name
2138 = language_class_name_from_physname (cu->language_defn,
2140 if (actual_class_name != NULL)
2143 = obsavestring (actual_class_name,
2144 strlen (actual_class_name),
2145 &cu->comp_unit_obstack);
2146 xfree (actual_class_name);
2151 child_pdi = child_pdi->die_sibling;
2156 /* Read a partial die corresponding to an enumeration type. */
2159 add_partial_enumeration (struct partial_die_info *enum_pdi,
2160 struct dwarf2_cu *cu)
2162 struct objfile *objfile = cu->objfile;
2163 bfd *abfd = objfile->obfd;
2164 struct partial_die_info *pdi;
2166 if (enum_pdi->name != NULL)
2167 add_partial_symbol (enum_pdi, cu);
2169 pdi = enum_pdi->die_child;
2172 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2173 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2175 add_partial_symbol (pdi, cu);
2176 pdi = pdi->die_sibling;
2180 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2181 Return the corresponding abbrev, or NULL if the number is zero (indicating
2182 an empty DIE). In either case *BYTES_READ will be set to the length of
2183 the initial number. */
2185 static struct abbrev_info *
2186 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2187 struct dwarf2_cu *cu)
2189 bfd *abfd = cu->objfile->obfd;
2190 unsigned int abbrev_number;
2191 struct abbrev_info *abbrev;
2193 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2195 if (abbrev_number == 0)
2198 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2201 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2202 bfd_get_filename (abfd));
2208 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2209 pointer to the end of a series of DIEs, terminated by an empty
2210 DIE. Any children of the skipped DIEs will also be skipped. */
2213 skip_children (gdb_byte *info_ptr, struct dwarf2_cu *cu)
2215 struct abbrev_info *abbrev;
2216 unsigned int bytes_read;
2220 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2222 return info_ptr + bytes_read;
2224 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
2228 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2229 should point just after the initial uleb128 of a DIE, and the
2230 abbrev corresponding to that skipped uleb128 should be passed in
2231 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2235 skip_one_die (gdb_byte *info_ptr, struct abbrev_info *abbrev,
2236 struct dwarf2_cu *cu)
2238 unsigned int bytes_read;
2239 struct attribute attr;
2240 bfd *abfd = cu->objfile->obfd;
2241 unsigned int form, i;
2243 for (i = 0; i < abbrev->num_attrs; i++)
2245 /* The only abbrev we care about is DW_AT_sibling. */
2246 if (abbrev->attrs[i].name == DW_AT_sibling)
2248 read_attribute (&attr, &abbrev->attrs[i],
2249 abfd, info_ptr, cu);
2250 if (attr.form == DW_FORM_ref_addr)
2251 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2253 return dwarf2_per_objfile->info_buffer
2254 + dwarf2_get_ref_die_offset (&attr, cu);
2257 /* If it isn't DW_AT_sibling, skip this attribute. */
2258 form = abbrev->attrs[i].form;
2263 case DW_FORM_ref_addr:
2264 info_ptr += cu->header.addr_size;
2283 case DW_FORM_string:
2284 read_string (abfd, info_ptr, &bytes_read);
2285 info_ptr += bytes_read;
2288 info_ptr += cu->header.offset_size;
2291 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2292 info_ptr += bytes_read;
2294 case DW_FORM_block1:
2295 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2297 case DW_FORM_block2:
2298 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2300 case DW_FORM_block4:
2301 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2305 case DW_FORM_ref_udata:
2306 info_ptr = skip_leb128 (abfd, info_ptr);
2308 case DW_FORM_indirect:
2309 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2310 info_ptr += bytes_read;
2311 /* We need to continue parsing from here, so just go back to
2313 goto skip_attribute;
2316 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2317 dwarf_form_name (form),
2318 bfd_get_filename (abfd));
2322 if (abbrev->has_children)
2323 return skip_children (info_ptr, cu);
2328 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2329 the next DIE after ORIG_PDI. */
2332 locate_pdi_sibling (struct partial_die_info *orig_pdi, gdb_byte *info_ptr,
2333 bfd *abfd, struct dwarf2_cu *cu)
2335 /* Do we know the sibling already? */
2337 if (orig_pdi->sibling)
2338 return orig_pdi->sibling;
2340 /* Are there any children to deal with? */
2342 if (!orig_pdi->has_children)
2345 /* Skip the children the long way. */
2347 return skip_children (info_ptr, cu);
2350 /* Expand this partial symbol table into a full symbol table. */
2353 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2355 /* FIXME: This is barely more than a stub. */
2360 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2366 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2367 gdb_flush (gdb_stdout);
2370 /* Restore our global data. */
2371 dwarf2_per_objfile = objfile_data (pst->objfile,
2372 dwarf2_objfile_data_key);
2374 psymtab_to_symtab_1 (pst);
2376 /* Finish up the debug error message. */
2378 printf_filtered (_("done.\n"));
2383 /* Add PER_CU to the queue. */
2386 queue_comp_unit (struct dwarf2_per_cu_data *per_cu)
2388 struct dwarf2_queue_item *item;
2391 item = xmalloc (sizeof (*item));
2392 item->per_cu = per_cu;
2395 if (dwarf2_queue == NULL)
2396 dwarf2_queue = item;
2398 dwarf2_queue_tail->next = item;
2400 dwarf2_queue_tail = item;
2403 /* Process the queue. */
2406 process_queue (struct objfile *objfile)
2408 struct dwarf2_queue_item *item, *next_item;
2410 /* Initially, there is just one item on the queue. Load its DIEs,
2411 and the DIEs of any other compilation units it requires,
2414 for (item = dwarf2_queue; item != NULL; item = item->next)
2416 /* Read in this compilation unit. This may add new items to
2417 the end of the queue. */
2418 load_full_comp_unit (item->per_cu, objfile);
2420 item->per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
2421 dwarf2_per_objfile->read_in_chain = item->per_cu;
2423 /* If this compilation unit has already had full symbols created,
2424 reset the TYPE fields in each DIE. */
2425 if (item->per_cu->type_hash)
2426 reset_die_and_siblings_types (item->per_cu->cu->dies,
2430 /* Now everything left on the queue needs to be read in. Process
2431 them, one at a time, removing from the queue as we finish. */
2432 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
2434 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
2435 process_full_comp_unit (item->per_cu);
2437 item->per_cu->queued = 0;
2438 next_item = item->next;
2442 dwarf2_queue_tail = NULL;
2445 /* Free all allocated queue entries. This function only releases anything if
2446 an error was thrown; if the queue was processed then it would have been
2447 freed as we went along. */
2450 dwarf2_release_queue (void *dummy)
2452 struct dwarf2_queue_item *item, *last;
2454 item = dwarf2_queue;
2457 /* Anything still marked queued is likely to be in an
2458 inconsistent state, so discard it. */
2459 if (item->per_cu->queued)
2461 if (item->per_cu->cu != NULL)
2462 free_one_cached_comp_unit (item->per_cu->cu);
2463 item->per_cu->queued = 0;
2471 dwarf2_queue = dwarf2_queue_tail = NULL;
2474 /* Read in full symbols for PST, and anything it depends on. */
2477 psymtab_to_symtab_1 (struct partial_symtab *pst)
2479 struct dwarf2_per_cu_data *per_cu;
2480 struct cleanup *back_to;
2483 for (i = 0; i < pst->number_of_dependencies; i++)
2484 if (!pst->dependencies[i]->readin)
2486 /* Inform about additional files that need to be read in. */
2489 /* FIXME: i18n: Need to make this a single string. */
2490 fputs_filtered (" ", gdb_stdout);
2492 fputs_filtered ("and ", gdb_stdout);
2494 printf_filtered ("%s...", pst->dependencies[i]->filename);
2495 wrap_here (""); /* Flush output */
2496 gdb_flush (gdb_stdout);
2498 psymtab_to_symtab_1 (pst->dependencies[i]);
2501 per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
2505 /* It's an include file, no symbols to read for it.
2506 Everything is in the parent symtab. */
2511 back_to = make_cleanup (dwarf2_release_queue, NULL);
2513 queue_comp_unit (per_cu);
2515 process_queue (pst->objfile);
2517 /* Age the cache, releasing compilation units that have not
2518 been used recently. */
2519 age_cached_comp_units ();
2521 do_cleanups (back_to);
2524 /* Load the DIEs associated with PST and PER_CU into memory. */
2526 static struct dwarf2_cu *
2527 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
2529 bfd *abfd = objfile->obfd;
2530 struct dwarf2_cu *cu;
2531 unsigned long offset;
2533 struct cleanup *back_to, *free_cu_cleanup;
2534 struct attribute *attr;
2537 /* Set local variables from the partial symbol table info. */
2538 offset = per_cu->offset;
2540 info_ptr = dwarf2_per_objfile->info_buffer + offset;
2542 cu = xmalloc (sizeof (struct dwarf2_cu));
2543 memset (cu, 0, sizeof (struct dwarf2_cu));
2545 /* If an error occurs while loading, release our storage. */
2546 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
2548 cu->objfile = objfile;
2550 /* read in the comp_unit header */
2551 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
2553 /* Read the abbrevs for this compilation unit */
2554 dwarf2_read_abbrevs (abfd, cu);
2555 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2557 cu->header.offset = offset;
2559 cu->per_cu = per_cu;
2562 /* We use this obstack for block values in dwarf_alloc_block. */
2563 obstack_init (&cu->comp_unit_obstack);
2565 cu->dies = read_comp_unit (info_ptr, abfd, cu);
2567 /* We try not to read any attributes in this function, because not
2568 all objfiles needed for references have been loaded yet, and symbol
2569 table processing isn't initialized. But we have to set the CU language,
2570 or we won't be able to build types correctly. */
2571 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
2573 set_cu_language (DW_UNSND (attr), cu);
2575 set_cu_language (language_minimal, cu);
2577 do_cleanups (back_to);
2579 /* We've successfully allocated this compilation unit. Let our caller
2580 clean it up when finished with it. */
2581 discard_cleanups (free_cu_cleanup);
2586 /* Generate full symbol information for PST and CU, whose DIEs have
2587 already been loaded into memory. */
2590 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
2592 struct partial_symtab *pst = per_cu->psymtab;
2593 struct dwarf2_cu *cu = per_cu->cu;
2594 struct objfile *objfile = pst->objfile;
2595 bfd *abfd = objfile->obfd;
2596 CORE_ADDR lowpc, highpc;
2597 struct symtab *symtab;
2598 struct cleanup *back_to;
2599 struct attribute *attr;
2602 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2604 /* We're in the global namespace. */
2605 processing_current_prefix = "";
2608 back_to = make_cleanup (really_free_pendings, NULL);
2610 cu->list_in_scope = &file_symbols;
2612 /* Find the base address of the compilation unit for range lists and
2613 location lists. It will normally be specified by DW_AT_low_pc.
2614 In DWARF-3 draft 4, the base address could be overridden by
2615 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2616 compilation units with discontinuous ranges. */
2618 cu->header.base_known = 0;
2619 cu->header.base_address = 0;
2621 attr = dwarf2_attr (cu->dies, DW_AT_entry_pc, cu);
2624 cu->header.base_address = DW_ADDR (attr);
2625 cu->header.base_known = 1;
2629 attr = dwarf2_attr (cu->dies, DW_AT_low_pc, cu);
2632 cu->header.base_address = DW_ADDR (attr);
2633 cu->header.base_known = 1;
2637 /* Do line number decoding in read_file_scope () */
2638 process_die (cu->dies, cu);
2640 /* Some compilers don't define a DW_AT_high_pc attribute for the
2641 compilation unit. If the DW_AT_high_pc is missing, synthesize
2642 it, by scanning the DIE's below the compilation unit. */
2643 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
2645 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
2647 /* Set symtab language to language from DW_AT_language.
2648 If the compilation is from a C file generated by language preprocessors,
2649 do not set the language if it was already deduced by start_subfile. */
2651 && !(cu->language == language_c && symtab->language != language_c))
2653 symtab->language = cu->language;
2655 pst->symtab = symtab;
2658 do_cleanups (back_to);
2661 /* Process a die and its children. */
2664 process_die (struct die_info *die, struct dwarf2_cu *cu)
2668 case DW_TAG_padding:
2670 case DW_TAG_compile_unit:
2671 read_file_scope (die, cu);
2673 case DW_TAG_subprogram:
2674 read_subroutine_type (die, cu);
2675 read_func_scope (die, cu);
2677 case DW_TAG_inlined_subroutine:
2678 /* FIXME: These are ignored for now.
2679 They could be used to set breakpoints on all inlined instances
2680 of a function and make GDB `next' properly over inlined functions. */
2682 case DW_TAG_lexical_block:
2683 case DW_TAG_try_block:
2684 case DW_TAG_catch_block:
2685 read_lexical_block_scope (die, cu);
2687 case DW_TAG_class_type:
2688 case DW_TAG_structure_type:
2689 case DW_TAG_union_type:
2690 read_structure_type (die, cu);
2691 process_structure_scope (die, cu);
2693 case DW_TAG_enumeration_type:
2694 read_enumeration_type (die, cu);
2695 process_enumeration_scope (die, cu);
2698 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2699 a symbol or process any children. Therefore it doesn't do anything
2700 that won't be done on-demand by read_type_die. */
2701 case DW_TAG_subroutine_type:
2702 read_subroutine_type (die, cu);
2704 case DW_TAG_set_type:
2705 read_set_type (die, cu);
2707 case DW_TAG_array_type:
2708 read_array_type (die, cu);
2710 case DW_TAG_pointer_type:
2711 read_tag_pointer_type (die, cu);
2713 case DW_TAG_ptr_to_member_type:
2714 read_tag_ptr_to_member_type (die, cu);
2716 case DW_TAG_reference_type:
2717 read_tag_reference_type (die, cu);
2719 case DW_TAG_string_type:
2720 read_tag_string_type (die, cu);
2724 case DW_TAG_base_type:
2725 read_base_type (die, cu);
2726 /* Add a typedef symbol for the type definition, if it has a
2728 new_symbol (die, die->type, cu);
2730 case DW_TAG_subrange_type:
2731 read_subrange_type (die, cu);
2732 /* Add a typedef symbol for the type definition, if it has a
2734 new_symbol (die, die->type, cu);
2736 case DW_TAG_common_block:
2737 read_common_block (die, cu);
2739 case DW_TAG_common_inclusion:
2741 case DW_TAG_namespace:
2742 processing_has_namespace_info = 1;
2743 read_namespace (die, cu);
2745 case DW_TAG_imported_declaration:
2746 case DW_TAG_imported_module:
2747 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2748 information contained in these. DW_TAG_imported_declaration
2749 dies shouldn't have children; DW_TAG_imported_module dies
2750 shouldn't in the C++ case, but conceivably could in the
2751 Fortran case, so we'll have to replace this gdb_assert if
2752 Fortran compilers start generating that info. */
2753 processing_has_namespace_info = 1;
2754 gdb_assert (die->child == NULL);
2757 new_symbol (die, NULL, cu);
2763 initialize_cu_func_list (struct dwarf2_cu *cu)
2765 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
2769 free_cu_line_header (void *arg)
2771 struct dwarf2_cu *cu = arg;
2773 free_line_header (cu->line_header);
2774 cu->line_header = NULL;
2778 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
2780 struct objfile *objfile = cu->objfile;
2781 struct comp_unit_head *cu_header = &cu->header;
2782 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
2783 CORE_ADDR lowpc = ((CORE_ADDR) -1);
2784 CORE_ADDR highpc = ((CORE_ADDR) 0);
2785 struct attribute *attr;
2787 char *comp_dir = NULL;
2788 struct die_info *child_die;
2789 bfd *abfd = objfile->obfd;
2790 struct line_header *line_header = 0;
2793 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2795 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
2797 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2798 from finish_block. */
2799 if (lowpc == ((CORE_ADDR) -1))
2804 /* Find the filename. Do not use dwarf2_name here, since the filename
2805 is not a source language identifier. */
2806 attr = dwarf2_attr (die, DW_AT_name, cu);
2809 name = DW_STRING (attr);
2812 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
2814 comp_dir = DW_STRING (attr);
2815 else if (name != NULL && IS_ABSOLUTE_PATH (name))
2817 comp_dir = ldirname (name);
2818 if (comp_dir != NULL)
2819 make_cleanup (xfree, comp_dir);
2821 if (comp_dir != NULL)
2823 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2824 directory, get rid of it. */
2825 char *cp = strchr (comp_dir, ':');
2827 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
2834 attr = dwarf2_attr (die, DW_AT_language, cu);
2837 set_cu_language (DW_UNSND (attr), cu);
2840 attr = dwarf2_attr (die, DW_AT_producer, cu);
2842 cu->producer = DW_STRING (attr);
2844 /* We assume that we're processing GCC output. */
2845 processing_gcc_compilation = 2;
2847 /* The compilation unit may be in a different language or objfile,
2848 zero out all remembered fundamental types. */
2849 memset (cu->ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
2851 start_symtab (name, comp_dir, lowpc);
2852 record_debugformat ("DWARF 2");
2853 record_producer (cu->producer);
2855 initialize_cu_func_list (cu);
2857 /* Decode line number information if present. We do this before
2858 processing child DIEs, so that the line header table is available
2859 for DW_AT_decl_file. */
2860 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
2863 unsigned int line_offset = DW_UNSND (attr);
2864 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
2867 cu->line_header = line_header;
2868 make_cleanup (free_cu_line_header, cu);
2869 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
2873 /* Process all dies in compilation unit. */
2874 if (die->child != NULL)
2876 child_die = die->child;
2877 while (child_die && child_die->tag)
2879 process_die (child_die, cu);
2880 child_die = sibling_die (child_die);
2884 /* Decode macro information, if present. Dwarf 2 macro information
2885 refers to information in the line number info statement program
2886 header, so we can only read it if we've read the header
2888 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
2889 if (attr && line_header)
2891 unsigned int macro_offset = DW_UNSND (attr);
2892 dwarf_decode_macros (line_header, macro_offset,
2893 comp_dir, abfd, cu);
2895 do_cleanups (back_to);
2899 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
2900 struct dwarf2_cu *cu)
2902 struct function_range *thisfn;
2904 thisfn = (struct function_range *)
2905 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
2906 thisfn->name = name;
2907 thisfn->lowpc = lowpc;
2908 thisfn->highpc = highpc;
2909 thisfn->seen_line = 0;
2910 thisfn->next = NULL;
2912 if (cu->last_fn == NULL)
2913 cu->first_fn = thisfn;
2915 cu->last_fn->next = thisfn;
2917 cu->last_fn = thisfn;
2921 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
2923 struct objfile *objfile = cu->objfile;
2924 struct context_stack *new;
2927 struct die_info *child_die;
2928 struct attribute *attr;
2930 const char *previous_prefix = processing_current_prefix;
2931 struct cleanup *back_to = NULL;
2934 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2936 name = dwarf2_linkage_name (die, cu);
2938 /* Ignore functions with missing or empty names and functions with
2939 missing or invalid low and high pc attributes. */
2940 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
2943 if (cu->language == language_cplus
2944 || cu->language == language_java)
2946 struct die_info *spec_die = die_specification (die, cu);
2948 /* NOTE: carlton/2004-01-23: We have to be careful in the
2949 presence of DW_AT_specification. For example, with GCC 3.4,
2954 // Definition of N::foo.
2958 then we'll have a tree of DIEs like this:
2960 1: DW_TAG_compile_unit
2961 2: DW_TAG_namespace // N
2962 3: DW_TAG_subprogram // declaration of N::foo
2963 4: DW_TAG_subprogram // definition of N::foo
2964 DW_AT_specification // refers to die #3
2966 Thus, when processing die #4, we have to pretend that we're
2967 in the context of its DW_AT_specification, namely the contex
2970 if (spec_die != NULL)
2972 char *specification_prefix = determine_prefix (spec_die, cu);
2973 processing_current_prefix = specification_prefix;
2974 back_to = make_cleanup (xfree, specification_prefix);
2981 /* Record the function range for dwarf_decode_lines. */
2982 add_to_cu_func_list (name, lowpc, highpc, cu);
2984 new = push_context (0, lowpc);
2985 new->name = new_symbol (die, die->type, cu);
2987 /* If there is a location expression for DW_AT_frame_base, record
2989 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
2991 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2992 expression is being recorded directly in the function's symbol
2993 and not in a separate frame-base object. I guess this hack is
2994 to avoid adding some sort of frame-base adjunct/annex to the
2995 function's symbol :-(. The problem with doing this is that it
2996 results in a function symbol with a location expression that
2997 has nothing to do with the location of the function, ouch! The
2998 relationship should be: a function's symbol has-a frame base; a
2999 frame-base has-a location expression. */
3000 dwarf2_symbol_mark_computed (attr, new->name, cu);
3002 cu->list_in_scope = &local_symbols;
3004 if (die->child != NULL)
3006 child_die = die->child;
3007 while (child_die && child_die->tag)
3009 process_die (child_die, cu);
3010 child_die = sibling_die (child_die);
3014 new = pop_context ();
3015 /* Make a block for the local symbols within. */
3016 finish_block (new->name, &local_symbols, new->old_blocks,
3017 lowpc, highpc, objfile);
3019 /* In C++, we can have functions nested inside functions (e.g., when
3020 a function declares a class that has methods). This means that
3021 when we finish processing a function scope, we may need to go
3022 back to building a containing block's symbol lists. */
3023 local_symbols = new->locals;
3024 param_symbols = new->params;
3026 /* If we've finished processing a top-level function, subsequent
3027 symbols go in the file symbol list. */
3028 if (outermost_context_p ())
3029 cu->list_in_scope = &file_symbols;
3031 processing_current_prefix = previous_prefix;
3032 if (back_to != NULL)
3033 do_cleanups (back_to);
3036 /* Process all the DIES contained within a lexical block scope. Start
3037 a new scope, process the dies, and then close the scope. */
3040 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
3042 struct objfile *objfile = cu->objfile;
3043 struct context_stack *new;
3044 CORE_ADDR lowpc, highpc;
3045 struct die_info *child_die;
3048 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3050 /* Ignore blocks with missing or invalid low and high pc attributes. */
3051 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3052 as multiple lexical blocks? Handling children in a sane way would
3053 be nasty. Might be easier to properly extend generic blocks to
3055 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
3060 push_context (0, lowpc);
3061 if (die->child != NULL)
3063 child_die = die->child;
3064 while (child_die && child_die->tag)
3066 process_die (child_die, cu);
3067 child_die = sibling_die (child_die);
3070 new = pop_context ();
3072 if (local_symbols != NULL)
3074 finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
3077 local_symbols = new->locals;
3080 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3081 Return 1 if the attributes are present and valid, otherwise, return 0. */
3084 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
3085 CORE_ADDR *high_return, struct dwarf2_cu *cu)
3087 struct objfile *objfile = cu->objfile;
3088 struct comp_unit_head *cu_header = &cu->header;
3089 bfd *obfd = objfile->obfd;
3090 unsigned int addr_size = cu_header->addr_size;
3091 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3092 /* Base address selection entry. */
3102 found_base = cu_header->base_known;
3103 base = cu_header->base_address;
3105 if (offset >= dwarf2_per_objfile->ranges_size)
3107 complaint (&symfile_complaints,
3108 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3112 buffer = dwarf2_per_objfile->ranges_buffer + offset;
3114 /* Read in the largest possible address. */
3115 marker = read_address (obfd, buffer, cu, &dummy);
3116 if ((marker & mask) == mask)
3118 /* If we found the largest possible address, then
3119 read the base address. */
3120 base = read_address (obfd, buffer + addr_size, cu, &dummy);
3121 buffer += 2 * addr_size;
3122 offset += 2 * addr_size;
3130 CORE_ADDR range_beginning, range_end;
3132 range_beginning = read_address (obfd, buffer, cu, &dummy);
3133 buffer += addr_size;
3134 range_end = read_address (obfd, buffer, cu, &dummy);
3135 buffer += addr_size;
3136 offset += 2 * addr_size;
3138 /* An end of list marker is a pair of zero addresses. */
3139 if (range_beginning == 0 && range_end == 0)
3140 /* Found the end of list entry. */
3143 /* Each base address selection entry is a pair of 2 values.
3144 The first is the largest possible address, the second is
3145 the base address. Check for a base address here. */
3146 if ((range_beginning & mask) == mask)
3148 /* If we found the largest possible address, then
3149 read the base address. */
3150 base = read_address (obfd, buffer + addr_size, cu, &dummy);
3157 /* We have no valid base address for the ranges
3159 complaint (&symfile_complaints,
3160 _("Invalid .debug_ranges data (no base address)"));
3164 range_beginning += base;
3167 /* FIXME: This is recording everything as a low-high
3168 segment of consecutive addresses. We should have a
3169 data structure for discontiguous block ranges
3173 low = range_beginning;
3179 if (range_beginning < low)
3180 low = range_beginning;
3181 if (range_end > high)
3187 /* If the first entry is an end-of-list marker, the range
3188 describes an empty scope, i.e. no instructions. */
3194 *high_return = high;
3198 /* Get low and high pc attributes from a die. Return 1 if the attributes
3199 are present and valid, otherwise, return 0. Return -1 if the range is
3200 discontinuous, i.e. derived from DW_AT_ranges information. */
3202 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
3203 CORE_ADDR *highpc, struct dwarf2_cu *cu)
3205 struct attribute *attr;
3210 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
3213 high = DW_ADDR (attr);
3214 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
3216 low = DW_ADDR (attr);
3218 /* Found high w/o low attribute. */
3221 /* Found consecutive range of addresses. */
3226 attr = dwarf2_attr (die, DW_AT_ranges, cu);
3229 /* Value of the DW_AT_ranges attribute is the offset in the
3230 .debug_ranges section. */
3231 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu))
3233 /* Found discontinuous range of addresses. */
3241 /* When using the GNU linker, .gnu.linkonce. sections are used to
3242 eliminate duplicate copies of functions and vtables and such.
3243 The linker will arbitrarily choose one and discard the others.
3244 The AT_*_pc values for such functions refer to local labels in
3245 these sections. If the section from that file was discarded, the
3246 labels are not in the output, so the relocs get a value of 0.
3247 If this is a discarded function, mark the pc bounds as invalid,
3248 so that GDB will ignore it. */
3249 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
3257 /* Get the low and high pc's represented by the scope DIE, and store
3258 them in *LOWPC and *HIGHPC. If the correct values can't be
3259 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3262 get_scope_pc_bounds (struct die_info *die,
3263 CORE_ADDR *lowpc, CORE_ADDR *highpc,
3264 struct dwarf2_cu *cu)
3266 CORE_ADDR best_low = (CORE_ADDR) -1;
3267 CORE_ADDR best_high = (CORE_ADDR) 0;
3268 CORE_ADDR current_low, current_high;
3270 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu))
3272 best_low = current_low;
3273 best_high = current_high;
3277 struct die_info *child = die->child;
3279 while (child && child->tag)
3281 switch (child->tag) {
3282 case DW_TAG_subprogram:
3283 if (dwarf2_get_pc_bounds (child, ¤t_low, ¤t_high, cu))
3285 best_low = min (best_low, current_low);
3286 best_high = max (best_high, current_high);
3289 case DW_TAG_namespace:
3290 /* FIXME: carlton/2004-01-16: Should we do this for
3291 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3292 that current GCC's always emit the DIEs corresponding
3293 to definitions of methods of classes as children of a
3294 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3295 the DIEs giving the declarations, which could be
3296 anywhere). But I don't see any reason why the
3297 standards says that they have to be there. */
3298 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
3300 if (current_low != ((CORE_ADDR) -1))
3302 best_low = min (best_low, current_low);
3303 best_high = max (best_high, current_high);
3311 child = sibling_die (child);
3316 *highpc = best_high;
3319 /* Add an aggregate field to the field list. */
3322 dwarf2_add_field (struct field_info *fip, struct die_info *die,
3323 struct dwarf2_cu *cu)
3325 struct objfile *objfile = cu->objfile;
3326 struct nextfield *new_field;
3327 struct attribute *attr;
3329 char *fieldname = "";
3331 /* Allocate a new field list entry and link it in. */
3332 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3333 make_cleanup (xfree, new_field);
3334 memset (new_field, 0, sizeof (struct nextfield));
3335 new_field->next = fip->fields;
3336 fip->fields = new_field;
3339 /* Handle accessibility and virtuality of field.
3340 The default accessibility for members is public, the default
3341 accessibility for inheritance is private. */
3342 if (die->tag != DW_TAG_inheritance)
3343 new_field->accessibility = DW_ACCESS_public;
3345 new_field->accessibility = DW_ACCESS_private;
3346 new_field->virtuality = DW_VIRTUALITY_none;
3348 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
3350 new_field->accessibility = DW_UNSND (attr);
3351 if (new_field->accessibility != DW_ACCESS_public)
3352 fip->non_public_fields = 1;
3353 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
3355 new_field->virtuality = DW_UNSND (attr);
3357 fp = &new_field->field;
3359 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
3361 /* Data member other than a C++ static data member. */
3363 /* Get type of field. */
3364 fp->type = die_type (die, cu);
3366 FIELD_STATIC_KIND (*fp) = 0;
3368 /* Get bit size of field (zero if none). */
3369 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
3372 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
3376 FIELD_BITSIZE (*fp) = 0;
3379 /* Get bit offset of field. */
3380 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
3383 FIELD_BITPOS (*fp) =
3384 decode_locdesc (DW_BLOCK (attr), cu) * bits_per_byte;
3387 FIELD_BITPOS (*fp) = 0;
3388 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
3391 if (BITS_BIG_ENDIAN)
3393 /* For big endian bits, the DW_AT_bit_offset gives the
3394 additional bit offset from the MSB of the containing
3395 anonymous object to the MSB of the field. We don't
3396 have to do anything special since we don't need to
3397 know the size of the anonymous object. */
3398 FIELD_BITPOS (*fp) += DW_UNSND (attr);
3402 /* For little endian bits, compute the bit offset to the
3403 MSB of the anonymous object, subtract off the number of
3404 bits from the MSB of the field to the MSB of the
3405 object, and then subtract off the number of bits of
3406 the field itself. The result is the bit offset of
3407 the LSB of the field. */
3409 int bit_offset = DW_UNSND (attr);
3411 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
3414 /* The size of the anonymous object containing
3415 the bit field is explicit, so use the
3416 indicated size (in bytes). */
3417 anonymous_size = DW_UNSND (attr);
3421 /* The size of the anonymous object containing
3422 the bit field must be inferred from the type
3423 attribute of the data member containing the
3425 anonymous_size = TYPE_LENGTH (fp->type);
3427 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
3428 - bit_offset - FIELD_BITSIZE (*fp);
3432 /* Get name of field. */
3433 fieldname = dwarf2_name (die, cu);
3434 if (fieldname == NULL)
3437 /* The name is already allocated along with this objfile, so we don't
3438 need to duplicate it for the type. */
3439 fp->name = fieldname;
3441 /* Change accessibility for artificial fields (e.g. virtual table
3442 pointer or virtual base class pointer) to private. */
3443 if (dwarf2_attr (die, DW_AT_artificial, cu))
3445 new_field->accessibility = DW_ACCESS_private;
3446 fip->non_public_fields = 1;
3449 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
3451 /* C++ static member. */
3453 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3454 is a declaration, but all versions of G++ as of this writing
3455 (so through at least 3.2.1) incorrectly generate
3456 DW_TAG_variable tags. */
3460 /* Get name of field. */
3461 fieldname = dwarf2_name (die, cu);
3462 if (fieldname == NULL)
3465 /* Get physical name. */
3466 physname = dwarf2_linkage_name (die, cu);
3468 /* The name is already allocated along with this objfile, so we don't
3469 need to duplicate it for the type. */
3470 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
3471 FIELD_TYPE (*fp) = die_type (die, cu);
3472 FIELD_NAME (*fp) = fieldname;
3474 else if (die->tag == DW_TAG_inheritance)
3476 /* C++ base class field. */
3477 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
3479 FIELD_BITPOS (*fp) = (decode_locdesc (DW_BLOCK (attr), cu)
3481 FIELD_BITSIZE (*fp) = 0;
3482 FIELD_STATIC_KIND (*fp) = 0;
3483 FIELD_TYPE (*fp) = die_type (die, cu);
3484 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
3485 fip->nbaseclasses++;
3489 /* Create the vector of fields, and attach it to the type. */
3492 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
3493 struct dwarf2_cu *cu)
3495 int nfields = fip->nfields;
3497 /* Record the field count, allocate space for the array of fields,
3498 and create blank accessibility bitfields if necessary. */
3499 TYPE_NFIELDS (type) = nfields;
3500 TYPE_FIELDS (type) = (struct field *)
3501 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3502 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3504 if (fip->non_public_fields)
3506 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3508 TYPE_FIELD_PRIVATE_BITS (type) =
3509 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3510 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3512 TYPE_FIELD_PROTECTED_BITS (type) =
3513 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3514 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3516 TYPE_FIELD_IGNORE_BITS (type) =
3517 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3518 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3521 /* If the type has baseclasses, allocate and clear a bit vector for
3522 TYPE_FIELD_VIRTUAL_BITS. */
3523 if (fip->nbaseclasses)
3525 int num_bytes = B_BYTES (fip->nbaseclasses);
3526 unsigned char *pointer;
3528 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3529 pointer = TYPE_ALLOC (type, num_bytes);
3530 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
3531 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
3532 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
3535 /* Copy the saved-up fields into the field vector. Start from the head
3536 of the list, adding to the tail of the field array, so that they end
3537 up in the same order in the array in which they were added to the list. */
3538 while (nfields-- > 0)
3540 TYPE_FIELD (type, nfields) = fip->fields->field;
3541 switch (fip->fields->accessibility)
3543 case DW_ACCESS_private:
3544 SET_TYPE_FIELD_PRIVATE (type, nfields);
3547 case DW_ACCESS_protected:
3548 SET_TYPE_FIELD_PROTECTED (type, nfields);
3551 case DW_ACCESS_public:
3555 /* Unknown accessibility. Complain and treat it as public. */
3557 complaint (&symfile_complaints, _("unsupported accessibility %d"),
3558 fip->fields->accessibility);
3562 if (nfields < fip->nbaseclasses)
3564 switch (fip->fields->virtuality)
3566 case DW_VIRTUALITY_virtual:
3567 case DW_VIRTUALITY_pure_virtual:
3568 SET_TYPE_FIELD_VIRTUAL (type, nfields);
3572 fip->fields = fip->fields->next;
3576 /* Add a member function to the proper fieldlist. */
3579 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
3580 struct type *type, struct dwarf2_cu *cu)
3582 struct objfile *objfile = cu->objfile;
3583 struct attribute *attr;
3584 struct fnfieldlist *flp;
3586 struct fn_field *fnp;
3589 struct nextfnfield *new_fnfield;
3591 /* Get name of member function. */
3592 fieldname = dwarf2_name (die, cu);
3593 if (fieldname == NULL)
3596 /* Get the mangled name. */
3597 physname = dwarf2_linkage_name (die, cu);
3599 /* Look up member function name in fieldlist. */
3600 for (i = 0; i < fip->nfnfields; i++)
3602 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
3606 /* Create new list element if necessary. */
3607 if (i < fip->nfnfields)
3608 flp = &fip->fnfieldlists[i];
3611 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
3613 fip->fnfieldlists = (struct fnfieldlist *)
3614 xrealloc (fip->fnfieldlists,
3615 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
3616 * sizeof (struct fnfieldlist));
3617 if (fip->nfnfields == 0)
3618 make_cleanup (free_current_contents, &fip->fnfieldlists);
3620 flp = &fip->fnfieldlists[fip->nfnfields];
3621 flp->name = fieldname;
3627 /* Create a new member function field and chain it to the field list
3629 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
3630 make_cleanup (xfree, new_fnfield);
3631 memset (new_fnfield, 0, sizeof (struct nextfnfield));
3632 new_fnfield->next = flp->head;
3633 flp->head = new_fnfield;
3636 /* Fill in the member function field info. */
3637 fnp = &new_fnfield->fnfield;
3638 /* The name is already allocated along with this objfile, so we don't
3639 need to duplicate it for the type. */
3640 fnp->physname = physname ? physname : "";
3641 fnp->type = alloc_type (objfile);
3642 if (die->type && TYPE_CODE (die->type) == TYPE_CODE_FUNC)
3644 int nparams = TYPE_NFIELDS (die->type);
3646 /* TYPE is the domain of this method, and DIE->TYPE is the type
3647 of the method itself (TYPE_CODE_METHOD). */
3648 smash_to_method_type (fnp->type, type,
3649 TYPE_TARGET_TYPE (die->type),
3650 TYPE_FIELDS (die->type),
3651 TYPE_NFIELDS (die->type),
3652 TYPE_VARARGS (die->type));
3654 /* Handle static member functions.
3655 Dwarf2 has no clean way to discern C++ static and non-static
3656 member functions. G++ helps GDB by marking the first
3657 parameter for non-static member functions (which is the
3658 this pointer) as artificial. We obtain this information
3659 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3660 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (die->type, 0) == 0)
3661 fnp->voffset = VOFFSET_STATIC;
3664 complaint (&symfile_complaints, _("member function type missing for '%s'"),
3667 /* Get fcontext from DW_AT_containing_type if present. */
3668 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
3669 fnp->fcontext = die_containing_type (die, cu);
3671 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3672 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3674 /* Get accessibility. */
3675 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
3678 switch (DW_UNSND (attr))
3680 case DW_ACCESS_private:
3681 fnp->is_private = 1;
3683 case DW_ACCESS_protected:
3684 fnp->is_protected = 1;
3689 /* Check for artificial methods. */
3690 attr = dwarf2_attr (die, DW_AT_artificial, cu);
3691 if (attr && DW_UNSND (attr) != 0)
3692 fnp->is_artificial = 1;
3694 /* Get index in virtual function table if it is a virtual member function. */
3695 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
3698 /* Support the .debug_loc offsets */
3699 if (attr_form_is_block (attr))
3701 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
3703 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
3705 dwarf2_complex_location_expr_complaint ();
3709 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3715 /* Create the vector of member function fields, and attach it to the type. */
3718 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
3719 struct dwarf2_cu *cu)
3721 struct fnfieldlist *flp;
3722 int total_length = 0;
3725 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3726 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
3727 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
3729 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
3731 struct nextfnfield *nfp = flp->head;
3732 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
3735 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
3736 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
3737 fn_flp->fn_fields = (struct fn_field *)
3738 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
3739 for (k = flp->length; (k--, nfp); nfp = nfp->next)
3740 fn_flp->fn_fields[k] = nfp->fnfield;
3742 total_length += flp->length;
3745 TYPE_NFN_FIELDS (type) = fip->nfnfields;
3746 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
3749 /* Returns non-zero if NAME is the name of a vtable member in CU's
3750 language, zero otherwise. */
3752 is_vtable_name (const char *name, struct dwarf2_cu *cu)
3754 static const char vptr[] = "_vptr";
3755 static const char vtable[] = "vtable";
3757 /* Look for the C++ and Java forms of the vtable. */
3758 if ((cu->language == language_java
3759 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
3760 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
3761 && is_cplus_marker (name[sizeof (vptr) - 1])))
3767 /* GCC outputs unnamed structures that are really pointers to member
3768 functions, with the ABI-specified layout. If DIE (from CU) describes
3769 such a structure, set its type, and return nonzero. Otherwise return
3772 GCC shouldn't do this; it should just output pointer to member DIEs.
3773 This is GCC PR debug/28767. */
3776 quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
3778 struct objfile *objfile = cu->objfile;
3780 struct die_info *pfn_die, *delta_die;
3781 struct attribute *pfn_name, *delta_name;
3782 struct type *pfn_type, *domain_type;
3784 /* Check for a structure with no name and two children. */
3785 if (die->tag != DW_TAG_structure_type
3786 || dwarf2_attr (die, DW_AT_name, cu) != NULL
3787 || die->child == NULL
3788 || die->child->sibling == NULL
3789 || (die->child->sibling->sibling != NULL
3790 && die->child->sibling->sibling->tag != DW_TAG_padding))
3793 /* Check for __pfn and __delta members. */
3794 pfn_die = die->child;
3795 pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
3796 if (pfn_die->tag != DW_TAG_member
3798 || DW_STRING (pfn_name) == NULL
3799 || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
3802 delta_die = pfn_die->sibling;
3803 delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
3804 if (delta_die->tag != DW_TAG_member
3805 || delta_name == NULL
3806 || DW_STRING (delta_name) == NULL
3807 || strcmp ("__delta", DW_STRING (delta_name)) != 0)
3810 /* Find the type of the method. */
3811 pfn_type = die_type (pfn_die, cu);
3812 if (pfn_type == NULL
3813 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
3814 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
3817 /* Look for the "this" argument. */
3818 pfn_type = TYPE_TARGET_TYPE (pfn_type);
3819 if (TYPE_NFIELDS (pfn_type) == 0
3820 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
3823 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
3824 type = alloc_type (objfile);
3825 smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
3826 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
3827 TYPE_VARARGS (pfn_type));
3828 type = lookup_methodptr_type (type);
3829 set_die_type (die, type, cu);
3834 /* Called when we find the DIE that starts a structure or union scope
3835 (definition) to process all dies that define the members of the
3838 NOTE: we need to call struct_type regardless of whether or not the
3839 DIE has an at_name attribute, since it might be an anonymous
3840 structure or union. This gets the type entered into our set of
3843 However, if the structure is incomplete (an opaque struct/union)
3844 then suppress creating a symbol table entry for it since gdb only
3845 wants to find the one with the complete definition. Note that if
3846 it is complete, we just call new_symbol, which does it's own
3847 checking about whether the struct/union is anonymous or not (and
3848 suppresses creating a symbol table entry itself). */
3851 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
3853 struct objfile *objfile = cu->objfile;
3855 struct attribute *attr;
3856 const char *previous_prefix = processing_current_prefix;
3857 struct cleanup *back_to = NULL;
3863 if (quirk_gcc_member_function_pointer (die, cu))
3866 type = alloc_type (objfile);
3867 INIT_CPLUS_SPECIFIC (type);
3868 name = dwarf2_name (die, cu);
3871 if (cu->language == language_cplus
3872 || cu->language == language_java)
3874 char *new_prefix = determine_class_name (die, cu);
3875 TYPE_TAG_NAME (type) = obsavestring (new_prefix,
3876 strlen (new_prefix),
3877 &objfile->objfile_obstack);
3878 back_to = make_cleanup (xfree, new_prefix);
3879 processing_current_prefix = new_prefix;
3883 /* The name is already allocated along with this objfile, so
3884 we don't need to duplicate it for the type. */
3885 TYPE_TAG_NAME (type) = name;
3889 if (die->tag == DW_TAG_structure_type)
3891 TYPE_CODE (type) = TYPE_CODE_STRUCT;
3893 else if (die->tag == DW_TAG_union_type)
3895 TYPE_CODE (type) = TYPE_CODE_UNION;
3899 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
3901 TYPE_CODE (type) = TYPE_CODE_CLASS;
3904 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
3907 TYPE_LENGTH (type) = DW_UNSND (attr);
3911 TYPE_LENGTH (type) = 0;
3914 TYPE_FLAGS (type) |= TYPE_FLAG_STUB_SUPPORTED;
3915 if (die_is_declaration (die, cu))
3916 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
3918 /* We need to add the type field to the die immediately so we don't
3919 infinitely recurse when dealing with pointers to the structure
3920 type within the structure itself. */
3921 set_die_type (die, type, cu);
3923 if (die->child != NULL && ! die_is_declaration (die, cu))
3925 struct field_info fi;
3926 struct die_info *child_die;
3927 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
3929 memset (&fi, 0, sizeof (struct field_info));
3931 child_die = die->child;
3933 while (child_die && child_die->tag)
3935 if (child_die->tag == DW_TAG_member
3936 || child_die->tag == DW_TAG_variable)
3938 /* NOTE: carlton/2002-11-05: A C++ static data member
3939 should be a DW_TAG_member that is a declaration, but
3940 all versions of G++ as of this writing (so through at
3941 least 3.2.1) incorrectly generate DW_TAG_variable
3942 tags for them instead. */
3943 dwarf2_add_field (&fi, child_die, cu);
3945 else if (child_die->tag == DW_TAG_subprogram)
3947 /* C++ member function. */
3948 read_type_die (child_die, cu);
3949 dwarf2_add_member_fn (&fi, child_die, type, cu);
3951 else if (child_die->tag == DW_TAG_inheritance)
3953 /* C++ base class field. */
3954 dwarf2_add_field (&fi, child_die, cu);
3956 child_die = sibling_die (child_die);
3959 /* Attach fields and member functions to the type. */
3961 dwarf2_attach_fields_to_type (&fi, type, cu);
3964 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
3966 /* Get the type which refers to the base class (possibly this
3967 class itself) which contains the vtable pointer for the current
3968 class from the DW_AT_containing_type attribute. */
3970 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
3972 struct type *t = die_containing_type (die, cu);
3974 TYPE_VPTR_BASETYPE (type) = t;
3979 /* Our own class provides vtbl ptr. */
3980 for (i = TYPE_NFIELDS (t) - 1;
3981 i >= TYPE_N_BASECLASSES (t);
3984 char *fieldname = TYPE_FIELD_NAME (t, i);
3986 if (is_vtable_name (fieldname, cu))
3988 TYPE_VPTR_FIELDNO (type) = i;
3993 /* Complain if virtual function table field not found. */
3994 if (i < TYPE_N_BASECLASSES (t))
3995 complaint (&symfile_complaints,
3996 _("virtual function table pointer not found when defining class '%s'"),
3997 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
4002 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
4005 else if (cu->producer
4006 && strncmp (cu->producer,
4007 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4009 /* The IBM XLC compiler does not provide direct indication
4010 of the containing type, but the vtable pointer is
4011 always named __vfp. */
4015 for (i = TYPE_NFIELDS (type) - 1;
4016 i >= TYPE_N_BASECLASSES (type);
4019 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
4021 TYPE_VPTR_FIELDNO (type) = i;
4022 TYPE_VPTR_BASETYPE (type) = type;
4029 do_cleanups (back_to);
4032 processing_current_prefix = previous_prefix;
4033 if (back_to != NULL)
4034 do_cleanups (back_to);
4038 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
4040 struct objfile *objfile = cu->objfile;
4041 const char *previous_prefix = processing_current_prefix;
4042 struct die_info *child_die = die->child;
4044 if (TYPE_TAG_NAME (die->type) != NULL)
4045 processing_current_prefix = TYPE_TAG_NAME (die->type);
4047 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4048 snapshots) has been known to create a die giving a declaration
4049 for a class that has, as a child, a die giving a definition for a
4050 nested class. So we have to process our children even if the
4051 current die is a declaration. Normally, of course, a declaration
4052 won't have any children at all. */
4054 while (child_die != NULL && child_die->tag)
4056 if (child_die->tag == DW_TAG_member
4057 || child_die->tag == DW_TAG_variable
4058 || child_die->tag == DW_TAG_inheritance)
4063 process_die (child_die, cu);
4065 child_die = sibling_die (child_die);
4068 /* Do not consider external references. According to the DWARF standard,
4069 these DIEs are identified by the fact that they have no byte_size
4070 attribute, and a declaration attribute. */
4071 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
4072 || !die_is_declaration (die, cu))
4073 new_symbol (die, die->type, cu);
4075 processing_current_prefix = previous_prefix;
4078 /* Given a DW_AT_enumeration_type die, set its type. We do not
4079 complete the type's fields yet, or create any symbols. */
4082 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
4084 struct objfile *objfile = cu->objfile;
4086 struct attribute *attr;
4092 type = alloc_type (objfile);
4094 TYPE_CODE (type) = TYPE_CODE_ENUM;
4095 name = dwarf2_name (die, cu);
4098 if (processing_has_namespace_info)
4100 TYPE_TAG_NAME (type) = typename_concat (&objfile->objfile_obstack,
4101 processing_current_prefix,
4106 /* The name is already allocated along with this objfile, so
4107 we don't need to duplicate it for the type. */
4108 TYPE_TAG_NAME (type) = name;
4112 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4115 TYPE_LENGTH (type) = DW_UNSND (attr);
4119 TYPE_LENGTH (type) = 0;
4122 set_die_type (die, type, cu);
4125 /* Determine the name of the type represented by DIE, which should be
4126 a named C++ or Java compound type. Return the name in question; the caller
4127 is responsible for xfree()'ing it. */
4130 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
4132 struct cleanup *back_to = NULL;
4133 struct die_info *spec_die = die_specification (die, cu);
4134 char *new_prefix = NULL;
4136 /* If this is the definition of a class that is declared by another
4137 die, then processing_current_prefix may not be accurate; see
4138 read_func_scope for a similar example. */
4139 if (spec_die != NULL)
4141 char *specification_prefix = determine_prefix (spec_die, cu);
4142 processing_current_prefix = specification_prefix;
4143 back_to = make_cleanup (xfree, specification_prefix);
4146 /* If we don't have namespace debug info, guess the name by trying
4147 to demangle the names of members, just like we did in
4148 guess_structure_name. */
4149 if (!processing_has_namespace_info)
4151 struct die_info *child;
4153 for (child = die->child;
4154 child != NULL && child->tag != 0;
4155 child = sibling_die (child))
4157 if (child->tag == DW_TAG_subprogram)
4160 = language_class_name_from_physname (cu->language_defn,
4164 if (new_prefix != NULL)
4170 if (new_prefix == NULL)
4172 const char *name = dwarf2_name (die, cu);
4173 new_prefix = typename_concat (NULL, processing_current_prefix,
4174 name ? name : "<<anonymous>>",
4178 if (back_to != NULL)
4179 do_cleanups (back_to);
4184 /* Given a pointer to a die which begins an enumeration, process all
4185 the dies that define the members of the enumeration, and create the
4186 symbol for the enumeration type.
4188 NOTE: We reverse the order of the element list. */
4191 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
4193 struct objfile *objfile = cu->objfile;
4194 struct die_info *child_die;
4195 struct field *fields;
4198 int unsigned_enum = 1;
4203 if (die->child != NULL)
4205 child_die = die->child;
4206 while (child_die && child_die->tag)
4208 if (child_die->tag != DW_TAG_enumerator)
4210 process_die (child_die, cu);
4214 name = dwarf2_name (child_die, cu);
4217 sym = new_symbol (child_die, die->type, cu);
4218 if (SYMBOL_VALUE (sym) < 0)
4221 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
4223 fields = (struct field *)
4225 (num_fields + DW_FIELD_ALLOC_CHUNK)
4226 * sizeof (struct field));
4229 FIELD_NAME (fields[num_fields]) = DEPRECATED_SYMBOL_NAME (sym);
4230 FIELD_TYPE (fields[num_fields]) = NULL;
4231 FIELD_BITPOS (fields[num_fields]) = SYMBOL_VALUE (sym);
4232 FIELD_BITSIZE (fields[num_fields]) = 0;
4233 FIELD_STATIC_KIND (fields[num_fields]) = 0;
4239 child_die = sibling_die (child_die);
4244 TYPE_NFIELDS (die->type) = num_fields;
4245 TYPE_FIELDS (die->type) = (struct field *)
4246 TYPE_ALLOC (die->type, sizeof (struct field) * num_fields);
4247 memcpy (TYPE_FIELDS (die->type), fields,
4248 sizeof (struct field) * num_fields);
4252 TYPE_FLAGS (die->type) |= TYPE_FLAG_UNSIGNED;
4255 new_symbol (die, die->type, cu);
4258 /* Extract all information from a DW_TAG_array_type DIE and put it in
4259 the DIE's type field. For now, this only handles one dimensional
4263 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
4265 struct objfile *objfile = cu->objfile;
4266 struct die_info *child_die;
4267 struct type *type = NULL;
4268 struct type *element_type, *range_type, *index_type;
4269 struct type **range_types = NULL;
4270 struct attribute *attr;
4272 struct cleanup *back_to;
4275 /* Return if we've already decoded this type. */
4281 element_type = die_type (die, cu);
4283 /* Irix 6.2 native cc creates array types without children for
4284 arrays with unspecified length. */
4285 if (die->child == NULL)
4287 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
4288 range_type = create_range_type (NULL, index_type, 0, -1);
4289 set_die_type (die, create_array_type (NULL, element_type, range_type),
4294 back_to = make_cleanup (null_cleanup, NULL);
4295 child_die = die->child;
4296 while (child_die && child_die->tag)
4298 if (child_die->tag == DW_TAG_subrange_type)
4300 read_subrange_type (child_die, cu);
4302 if (child_die->type != NULL)
4304 /* The range type was succesfully read. Save it for
4305 the array type creation. */
4306 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
4308 range_types = (struct type **)
4309 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
4310 * sizeof (struct type *));
4312 make_cleanup (free_current_contents, &range_types);
4314 range_types[ndim++] = child_die->type;
4317 child_die = sibling_die (child_die);
4320 /* Dwarf2 dimensions are output from left to right, create the
4321 necessary array types in backwards order. */
4323 type = element_type;
4325 if (read_array_order (die, cu) == DW_ORD_col_major)
4329 type = create_array_type (NULL, type, range_types[i++]);
4334 type = create_array_type (NULL, type, range_types[ndim]);
4337 /* Understand Dwarf2 support for vector types (like they occur on
4338 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4339 array type. This is not part of the Dwarf2/3 standard yet, but a
4340 custom vendor extension. The main difference between a regular
4341 array and the vector variant is that vectors are passed by value
4343 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
4345 make_vector_type (type);
4347 name = dwarf2_name (die, cu);
4349 TYPE_NAME (type) = name;
4351 do_cleanups (back_to);
4353 /* Install the type in the die. */
4354 set_die_type (die, type, cu);
4357 static enum dwarf_array_dim_ordering
4358 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
4360 struct attribute *attr;
4362 attr = dwarf2_attr (die, DW_AT_ordering, cu);
4364 if (attr) return DW_SND (attr);
4367 GNU F77 is a special case, as at 08/2004 array type info is the
4368 opposite order to the dwarf2 specification, but data is still
4369 laid out as per normal fortran.
4371 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4375 if (cu->language == language_fortran &&
4376 cu->producer && strstr (cu->producer, "GNU F77"))
4378 return DW_ORD_row_major;
4381 switch (cu->language_defn->la_array_ordering)
4383 case array_column_major:
4384 return DW_ORD_col_major;
4385 case array_row_major:
4387 return DW_ORD_row_major;
4391 /* Extract all information from a DW_TAG_set_type DIE and put it in
4392 the DIE's type field. */
4395 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
4397 if (die->type == NULL)
4398 die->type = create_set_type ((struct type *) NULL, die_type (die, cu));
4401 /* First cut: install each common block member as a global variable. */
4404 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
4406 struct die_info *child_die;
4407 struct attribute *attr;
4409 CORE_ADDR base = (CORE_ADDR) 0;
4411 attr = dwarf2_attr (die, DW_AT_location, cu);
4414 /* Support the .debug_loc offsets */
4415 if (attr_form_is_block (attr))
4417 base = decode_locdesc (DW_BLOCK (attr), cu);
4419 else if (attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
4421 dwarf2_complex_location_expr_complaint ();
4425 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4426 "common block member");
4429 if (die->child != NULL)
4431 child_die = die->child;
4432 while (child_die && child_die->tag)
4434 sym = new_symbol (child_die, NULL, cu);
4435 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
4438 SYMBOL_VALUE_ADDRESS (sym) =
4439 base + decode_locdesc (DW_BLOCK (attr), cu);
4440 add_symbol_to_list (sym, &global_symbols);
4442 child_die = sibling_die (child_die);
4447 /* Read a C++ namespace. */
4450 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
4452 struct objfile *objfile = cu->objfile;
4453 const char *previous_prefix = processing_current_prefix;
4456 struct die_info *current_die;
4457 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4459 name = namespace_name (die, &is_anonymous, cu);
4461 /* Now build the name of the current namespace. */
4463 if (previous_prefix[0] == '\0')
4465 processing_current_prefix = name;
4469 char *temp_name = typename_concat (NULL, previous_prefix, name, cu);
4470 make_cleanup (xfree, temp_name);
4471 processing_current_prefix = temp_name;
4474 /* Add a symbol associated to this if we haven't seen the namespace
4475 before. Also, add a using directive if it's an anonymous
4478 if (dwarf2_extension (die, cu) == NULL)
4482 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4483 this cast will hopefully become unnecessary. */
4484 type = init_type (TYPE_CODE_NAMESPACE, 0, 0,
4485 (char *) processing_current_prefix,
4487 TYPE_TAG_NAME (type) = TYPE_NAME (type);
4489 new_symbol (die, type, cu);
4490 set_die_type (die, type, cu);
4493 cp_add_using_directive (processing_current_prefix,
4494 strlen (previous_prefix),
4495 strlen (processing_current_prefix));
4498 if (die->child != NULL)
4500 struct die_info *child_die = die->child;
4502 while (child_die && child_die->tag)
4504 process_die (child_die, cu);
4505 child_die = sibling_die (child_die);
4509 processing_current_prefix = previous_prefix;
4510 do_cleanups (back_to);
4513 /* Return the name of the namespace represented by DIE. Set
4514 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4518 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
4520 struct die_info *current_die;
4521 const char *name = NULL;
4523 /* Loop through the extensions until we find a name. */
4525 for (current_die = die;
4526 current_die != NULL;
4527 current_die = dwarf2_extension (die, cu))
4529 name = dwarf2_name (current_die, cu);
4534 /* Is it an anonymous namespace? */
4536 *is_anonymous = (name == NULL);
4538 name = "(anonymous namespace)";
4543 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4544 the user defined type vector. */
4547 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
4549 struct comp_unit_head *cu_header = &cu->header;
4551 struct attribute *attr_byte_size;
4552 struct attribute *attr_address_class;
4553 int byte_size, addr_class;
4560 type = lookup_pointer_type (die_type (die, cu));
4562 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
4564 byte_size = DW_UNSND (attr_byte_size);
4566 byte_size = cu_header->addr_size;
4568 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
4569 if (attr_address_class)
4570 addr_class = DW_UNSND (attr_address_class);
4572 addr_class = DW_ADDR_none;
4574 /* If the pointer size or address class is different than the
4575 default, create a type variant marked as such and set the
4576 length accordingly. */
4577 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
4579 if (gdbarch_address_class_type_flags_p (current_gdbarch))
4583 type_flags = gdbarch_address_class_type_flags
4584 (current_gdbarch, byte_size, addr_class);
4585 gdb_assert ((type_flags & ~TYPE_FLAG_ADDRESS_CLASS_ALL) == 0);
4586 type = make_type_with_address_space (type, type_flags);
4588 else if (TYPE_LENGTH (type) != byte_size)
4590 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
4593 /* Should we also complain about unhandled address classes? */
4597 TYPE_LENGTH (type) = byte_size;
4598 set_die_type (die, type, cu);
4601 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4602 the user defined type vector. */
4605 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
4607 struct objfile *objfile = cu->objfile;
4609 struct type *to_type;
4610 struct type *domain;
4617 to_type = die_type (die, cu);
4618 domain = die_containing_type (die, cu);
4620 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
4621 type = lookup_methodptr_type (to_type);
4623 type = lookup_memberptr_type (to_type, domain);
4625 set_die_type (die, type, cu);
4628 /* Extract all information from a DW_TAG_reference_type DIE and add to
4629 the user defined type vector. */
4632 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
4634 struct comp_unit_head *cu_header = &cu->header;
4636 struct attribute *attr;
4643 type = lookup_reference_type (die_type (die, cu));
4644 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4647 TYPE_LENGTH (type) = DW_UNSND (attr);
4651 TYPE_LENGTH (type) = cu_header->addr_size;
4653 set_die_type (die, type, cu);
4657 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
4659 struct type *base_type;
4666 base_type = die_type (die, cu);
4667 set_die_type (die, make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0),
4672 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
4674 struct type *base_type;
4681 base_type = die_type (die, cu);
4682 set_die_type (die, make_cv_type (TYPE_CONST (base_type), 1, base_type, 0),
4686 /* Extract all information from a DW_TAG_string_type DIE and add to
4687 the user defined type vector. It isn't really a user defined type,
4688 but it behaves like one, with other DIE's using an AT_user_def_type
4689 attribute to reference it. */
4692 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
4694 struct objfile *objfile = cu->objfile;
4695 struct type *type, *range_type, *index_type, *char_type;
4696 struct attribute *attr;
4697 unsigned int length;
4704 attr = dwarf2_attr (die, DW_AT_string_length, cu);
4707 length = DW_UNSND (attr);
4711 /* check for the DW_AT_byte_size attribute */
4712 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4715 length = DW_UNSND (attr);
4722 index_type = dwarf2_fundamental_type (objfile, FT_INTEGER, cu);
4723 range_type = create_range_type (NULL, index_type, 1, length);
4724 if (cu->language == language_fortran)
4726 /* Need to create a unique string type for bounds
4728 type = create_string_type (0, range_type);
4732 char_type = dwarf2_fundamental_type (objfile, FT_CHAR, cu);
4733 type = create_string_type (char_type, range_type);
4735 set_die_type (die, type, cu);
4738 /* Handle DIES due to C code like:
4742 int (*funcp)(int a, long l);
4746 ('funcp' generates a DW_TAG_subroutine_type DIE)
4750 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
4752 struct type *type; /* Type that this function returns */
4753 struct type *ftype; /* Function that returns above type */
4754 struct attribute *attr;
4756 /* Decode the type that this subroutine returns */
4761 type = die_type (die, cu);
4762 ftype = make_function_type (type, (struct type **) 0);
4764 /* All functions in C++, Pascal and Java have prototypes. */
4765 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
4766 if ((attr && (DW_UNSND (attr) != 0))
4767 || cu->language == language_cplus
4768 || cu->language == language_java
4769 || cu->language == language_pascal)
4770 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
4772 if (die->child != NULL)
4774 struct die_info *child_die;
4778 /* Count the number of parameters.
4779 FIXME: GDB currently ignores vararg functions, but knows about
4780 vararg member functions. */
4781 child_die = die->child;
4782 while (child_die && child_die->tag)
4784 if (child_die->tag == DW_TAG_formal_parameter)
4786 else if (child_die->tag == DW_TAG_unspecified_parameters)
4787 TYPE_FLAGS (ftype) |= TYPE_FLAG_VARARGS;
4788 child_die = sibling_die (child_die);
4791 /* Allocate storage for parameters and fill them in. */
4792 TYPE_NFIELDS (ftype) = nparams;
4793 TYPE_FIELDS (ftype) = (struct field *)
4794 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
4796 child_die = die->child;
4797 while (child_die && child_die->tag)
4799 if (child_die->tag == DW_TAG_formal_parameter)
4801 /* Dwarf2 has no clean way to discern C++ static and non-static
4802 member functions. G++ helps GDB by marking the first
4803 parameter for non-static member functions (which is the
4804 this pointer) as artificial. We pass this information
4805 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4806 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
4808 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
4810 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
4811 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
4814 child_die = sibling_die (child_die);
4818 set_die_type (die, ftype, cu);
4822 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
4824 struct objfile *objfile = cu->objfile;
4825 struct attribute *attr;
4830 name = dwarf2_name (die, cu);
4831 set_die_type (die, init_type (TYPE_CODE_TYPEDEF, 0,
4832 TYPE_FLAG_TARGET_STUB, name, objfile),
4834 TYPE_TARGET_TYPE (die->type) = die_type (die, cu);
4838 /* Find a representation of a given base type and install
4839 it in the TYPE field of the die. */
4842 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
4844 struct objfile *objfile = cu->objfile;
4846 struct attribute *attr;
4847 int encoding = 0, size = 0;
4850 /* If we've already decoded this die, this is a no-op. */
4856 attr = dwarf2_attr (die, DW_AT_encoding, cu);
4859 encoding = DW_UNSND (attr);
4861 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4864 size = DW_UNSND (attr);
4866 name = dwarf2_name (die, cu);
4869 enum type_code code = TYPE_CODE_INT;
4874 case DW_ATE_address:
4875 /* Turn DW_ATE_address into a void * pointer. */
4876 code = TYPE_CODE_PTR;
4877 type_flags |= TYPE_FLAG_UNSIGNED;
4879 case DW_ATE_boolean:
4880 code = TYPE_CODE_BOOL;
4881 type_flags |= TYPE_FLAG_UNSIGNED;
4883 case DW_ATE_complex_float:
4884 code = TYPE_CODE_COMPLEX;
4886 case DW_ATE_decimal_float:
4887 code = TYPE_CODE_DECFLOAT;
4890 code = TYPE_CODE_FLT;
4894 case DW_ATE_unsigned:
4895 type_flags |= TYPE_FLAG_UNSIGNED;
4897 case DW_ATE_signed_char:
4898 if (cu->language == language_m2)
4899 code = TYPE_CODE_CHAR;
4901 case DW_ATE_unsigned_char:
4902 if (cu->language == language_m2)
4903 code = TYPE_CODE_CHAR;
4904 type_flags |= TYPE_FLAG_UNSIGNED;
4907 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
4908 dwarf_type_encoding_name (encoding));
4911 type = init_type (code, size, type_flags, name, objfile);
4912 if (encoding == DW_ATE_address)
4913 TYPE_TARGET_TYPE (type) = dwarf2_fundamental_type (objfile, FT_VOID,
4915 else if (encoding == DW_ATE_complex_float)
4918 TYPE_TARGET_TYPE (type)
4919 = dwarf2_fundamental_type (objfile, FT_EXT_PREC_FLOAT, cu);
4920 else if (size == 16)
4921 TYPE_TARGET_TYPE (type)
4922 = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
4924 TYPE_TARGET_TYPE (type)
4925 = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
4930 type = dwarf_base_type (encoding, size, cu);
4932 set_die_type (die, type, cu);
4935 /* Read the given DW_AT_subrange DIE. */
4938 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
4940 struct type *base_type;
4941 struct type *range_type;
4942 struct attribute *attr;
4947 /* If we have already decoded this die, then nothing more to do. */
4951 base_type = die_type (die, cu);
4952 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
4954 complaint (&symfile_complaints,
4955 _("DW_AT_type missing from DW_TAG_subrange_type"));
4957 = dwarf_base_type (DW_ATE_signed,
4958 gdbarch_addr_bit (current_gdbarch) / 8, cu);
4961 if (cu->language == language_fortran)
4963 /* FORTRAN implies a lower bound of 1, if not given. */
4967 /* FIXME: For variable sized arrays either of these could be
4968 a variable rather than a constant value. We'll allow it,
4969 but we don't know how to handle it. */
4970 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
4972 low = dwarf2_get_attr_constant_value (attr, 0);
4974 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
4977 if (attr->form == DW_FORM_block1)
4979 /* GCC encodes arrays with unspecified or dynamic length
4980 with a DW_FORM_block1 attribute.
4981 FIXME: GDB does not yet know how to handle dynamic
4982 arrays properly, treat them as arrays with unspecified
4985 FIXME: jimb/2003-09-22: GDB does not really know
4986 how to handle arrays of unspecified length
4987 either; we just represent them as zero-length
4988 arrays. Choose an appropriate upper bound given
4989 the lower bound we've computed above. */
4993 high = dwarf2_get_attr_constant_value (attr, 1);
4996 range_type = create_range_type (NULL, base_type, low, high);
4998 name = dwarf2_name (die, cu);
5000 TYPE_NAME (range_type) = name;
5002 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5004 TYPE_LENGTH (range_type) = DW_UNSND (attr);
5006 set_die_type (die, range_type, cu);
5010 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
5017 /* For now, we only support the C meaning of an unspecified type: void. */
5019 type = init_type (TYPE_CODE_VOID, 0, 0, dwarf2_name (die, cu),
5022 set_die_type (die, type, cu);
5025 /* Read a whole compilation unit into a linked list of dies. */
5027 static struct die_info *
5028 read_comp_unit (gdb_byte *info_ptr, bfd *abfd, struct dwarf2_cu *cu)
5030 return read_die_and_children (info_ptr, abfd, cu, &info_ptr, NULL);
5033 /* Read a single die and all its descendents. Set the die's sibling
5034 field to NULL; set other fields in the die correctly, and set all
5035 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5036 location of the info_ptr after reading all of those dies. PARENT
5037 is the parent of the die in question. */
5039 static struct die_info *
5040 read_die_and_children (gdb_byte *info_ptr, bfd *abfd,
5041 struct dwarf2_cu *cu,
5042 gdb_byte **new_info_ptr,
5043 struct die_info *parent)
5045 struct die_info *die;
5049 cur_ptr = read_full_die (&die, abfd, info_ptr, cu, &has_children);
5050 store_in_ref_table (die->offset, die, cu);
5054 die->child = read_die_and_siblings (cur_ptr, abfd, cu,
5060 *new_info_ptr = cur_ptr;
5063 die->sibling = NULL;
5064 die->parent = parent;
5068 /* Read a die, all of its descendents, and all of its siblings; set
5069 all of the fields of all of the dies correctly. Arguments are as
5070 in read_die_and_children. */
5072 static struct die_info *
5073 read_die_and_siblings (gdb_byte *info_ptr, bfd *abfd,
5074 struct dwarf2_cu *cu,
5075 gdb_byte **new_info_ptr,
5076 struct die_info *parent)
5078 struct die_info *first_die, *last_sibling;
5082 first_die = last_sibling = NULL;
5086 struct die_info *die
5087 = read_die_and_children (cur_ptr, abfd, cu, &cur_ptr, parent);
5095 last_sibling->sibling = die;
5100 *new_info_ptr = cur_ptr;
5110 /* Free a linked list of dies. */
5113 free_die_list (struct die_info *dies)
5115 struct die_info *die, *next;
5120 if (die->child != NULL)
5121 free_die_list (die->child);
5122 next = die->sibling;
5129 /* Read the contents of the section at OFFSET and of size SIZE from the
5130 object file specified by OBJFILE into the objfile_obstack and return it. */
5133 dwarf2_read_section (struct objfile *objfile, asection *sectp)
5135 bfd *abfd = objfile->obfd;
5136 gdb_byte *buf, *retbuf;
5137 bfd_size_type size = bfd_get_section_size (sectp);
5142 buf = obstack_alloc (&objfile->objfile_obstack, size);
5143 retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
5147 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
5148 || bfd_bread (buf, size, abfd) != size)
5149 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5150 bfd_get_filename (abfd));
5155 /* In DWARF version 2, the description of the debugging information is
5156 stored in a separate .debug_abbrev section. Before we read any
5157 dies from a section we read in all abbreviations and install them
5158 in a hash table. This function also sets flags in CU describing
5159 the data found in the abbrev table. */
5162 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
5164 struct comp_unit_head *cu_header = &cu->header;
5165 gdb_byte *abbrev_ptr;
5166 struct abbrev_info *cur_abbrev;
5167 unsigned int abbrev_number, bytes_read, abbrev_name;
5168 unsigned int abbrev_form, hash_number;
5169 struct attr_abbrev *cur_attrs;
5170 unsigned int allocated_attrs;
5172 /* Initialize dwarf2 abbrevs */
5173 obstack_init (&cu->abbrev_obstack);
5174 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
5176 * sizeof (struct abbrev_info *)));
5177 memset (cu->dwarf2_abbrevs, 0,
5178 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
5180 abbrev_ptr = dwarf2_per_objfile->abbrev_buffer + cu_header->abbrev_offset;
5181 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5182 abbrev_ptr += bytes_read;
5184 allocated_attrs = ATTR_ALLOC_CHUNK;
5185 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
5187 /* loop until we reach an abbrev number of 0 */
5188 while (abbrev_number)
5190 cur_abbrev = dwarf_alloc_abbrev (cu);
5192 /* read in abbrev header */
5193 cur_abbrev->number = abbrev_number;
5194 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5195 abbrev_ptr += bytes_read;
5196 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
5199 if (cur_abbrev->tag == DW_TAG_namespace)
5200 cu->has_namespace_info = 1;
5202 /* now read in declarations */
5203 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5204 abbrev_ptr += bytes_read;
5205 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5206 abbrev_ptr += bytes_read;
5209 if (cur_abbrev->num_attrs == allocated_attrs)
5211 allocated_attrs += ATTR_ALLOC_CHUNK;
5213 = xrealloc (cur_attrs, (allocated_attrs
5214 * sizeof (struct attr_abbrev)));
5217 /* Record whether this compilation unit might have
5218 inter-compilation-unit references. If we don't know what form
5219 this attribute will have, then it might potentially be a
5220 DW_FORM_ref_addr, so we conservatively expect inter-CU
5223 if (abbrev_form == DW_FORM_ref_addr
5224 || abbrev_form == DW_FORM_indirect)
5225 cu->has_form_ref_addr = 1;
5227 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
5228 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
5229 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5230 abbrev_ptr += bytes_read;
5231 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5232 abbrev_ptr += bytes_read;
5235 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
5236 (cur_abbrev->num_attrs
5237 * sizeof (struct attr_abbrev)));
5238 memcpy (cur_abbrev->attrs, cur_attrs,
5239 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
5241 hash_number = abbrev_number % ABBREV_HASH_SIZE;
5242 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
5243 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
5245 /* Get next abbreviation.
5246 Under Irix6 the abbreviations for a compilation unit are not
5247 always properly terminated with an abbrev number of 0.
5248 Exit loop if we encounter an abbreviation which we have
5249 already read (which means we are about to read the abbreviations
5250 for the next compile unit) or if the end of the abbreviation
5251 table is reached. */
5252 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev_buffer)
5253 >= dwarf2_per_objfile->abbrev_size)
5255 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
5256 abbrev_ptr += bytes_read;
5257 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
5264 /* Release the memory used by the abbrev table for a compilation unit. */
5267 dwarf2_free_abbrev_table (void *ptr_to_cu)
5269 struct dwarf2_cu *cu = ptr_to_cu;
5271 obstack_free (&cu->abbrev_obstack, NULL);
5272 cu->dwarf2_abbrevs = NULL;
5275 /* Lookup an abbrev_info structure in the abbrev hash table. */
5277 static struct abbrev_info *
5278 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
5280 unsigned int hash_number;
5281 struct abbrev_info *abbrev;
5283 hash_number = number % ABBREV_HASH_SIZE;
5284 abbrev = cu->dwarf2_abbrevs[hash_number];
5288 if (abbrev->number == number)
5291 abbrev = abbrev->next;
5296 /* Returns nonzero if TAG represents a type that we might generate a partial
5300 is_type_tag_for_partial (int tag)
5305 /* Some types that would be reasonable to generate partial symbols for,
5306 that we don't at present. */
5307 case DW_TAG_array_type:
5308 case DW_TAG_file_type:
5309 case DW_TAG_ptr_to_member_type:
5310 case DW_TAG_set_type:
5311 case DW_TAG_string_type:
5312 case DW_TAG_subroutine_type:
5314 case DW_TAG_base_type:
5315 case DW_TAG_class_type:
5316 case DW_TAG_enumeration_type:
5317 case DW_TAG_structure_type:
5318 case DW_TAG_subrange_type:
5319 case DW_TAG_typedef:
5320 case DW_TAG_union_type:
5327 /* Load all DIEs that are interesting for partial symbols into memory. */
5329 static struct partial_die_info *
5330 load_partial_dies (bfd *abfd, gdb_byte *info_ptr, int building_psymtab,
5331 struct dwarf2_cu *cu)
5333 struct partial_die_info *part_die;
5334 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
5335 struct abbrev_info *abbrev;
5336 unsigned int bytes_read;
5337 unsigned int load_all = 0;
5339 int nesting_level = 1;
5344 if (cu->per_cu && cu->per_cu->load_all_dies)
5348 = htab_create_alloc_ex (cu->header.length / 12,
5352 &cu->comp_unit_obstack,
5353 hashtab_obstack_allocate,
5354 dummy_obstack_deallocate);
5356 part_die = obstack_alloc (&cu->comp_unit_obstack,
5357 sizeof (struct partial_die_info));
5361 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
5363 /* A NULL abbrev means the end of a series of children. */
5366 if (--nesting_level == 0)
5368 /* PART_DIE was probably the last thing allocated on the
5369 comp_unit_obstack, so we could call obstack_free
5370 here. We don't do that because the waste is small,
5371 and will be cleaned up when we're done with this
5372 compilation unit. This way, we're also more robust
5373 against other users of the comp_unit_obstack. */
5376 info_ptr += bytes_read;
5377 last_die = parent_die;
5378 parent_die = parent_die->die_parent;
5382 /* Check whether this DIE is interesting enough to save. Normally
5383 we would not be interested in members here, but there may be
5384 later variables referencing them via DW_AT_specification (for
5387 && !is_type_tag_for_partial (abbrev->tag)
5388 && abbrev->tag != DW_TAG_enumerator
5389 && abbrev->tag != DW_TAG_subprogram
5390 && abbrev->tag != DW_TAG_variable
5391 && abbrev->tag != DW_TAG_namespace
5392 && abbrev->tag != DW_TAG_member)
5394 /* Otherwise we skip to the next sibling, if any. */
5395 info_ptr = skip_one_die (info_ptr + bytes_read, abbrev, cu);
5399 info_ptr = read_partial_die (part_die, abbrev, bytes_read,
5400 abfd, info_ptr, cu);
5402 /* This two-pass algorithm for processing partial symbols has a
5403 high cost in cache pressure. Thus, handle some simple cases
5404 here which cover the majority of C partial symbols. DIEs
5405 which neither have specification tags in them, nor could have
5406 specification tags elsewhere pointing at them, can simply be
5407 processed and discarded.
5409 This segment is also optional; scan_partial_symbols and
5410 add_partial_symbol will handle these DIEs if we chain
5411 them in normally. When compilers which do not emit large
5412 quantities of duplicate debug information are more common,
5413 this code can probably be removed. */
5415 /* Any complete simple types at the top level (pretty much all
5416 of them, for a language without namespaces), can be processed
5418 if (parent_die == NULL
5419 && part_die->has_specification == 0
5420 && part_die->is_declaration == 0
5421 && (part_die->tag == DW_TAG_typedef
5422 || part_die->tag == DW_TAG_base_type
5423 || part_die->tag == DW_TAG_subrange_type))
5425 if (building_psymtab && part_die->name != NULL)
5426 add_psymbol_to_list (part_die->name, strlen (part_die->name),
5427 VAR_DOMAIN, LOC_TYPEDEF,
5428 &cu->objfile->static_psymbols,
5429 0, (CORE_ADDR) 0, cu->language, cu->objfile);
5430 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
5434 /* If we're at the second level, and we're an enumerator, and
5435 our parent has no specification (meaning possibly lives in a
5436 namespace elsewhere), then we can add the partial symbol now
5437 instead of queueing it. */
5438 if (part_die->tag == DW_TAG_enumerator
5439 && parent_die != NULL
5440 && parent_die->die_parent == NULL
5441 && parent_die->tag == DW_TAG_enumeration_type
5442 && parent_die->has_specification == 0)
5444 if (part_die->name == NULL)
5445 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
5446 else if (building_psymtab)
5447 add_psymbol_to_list (part_die->name, strlen (part_die->name),
5448 VAR_DOMAIN, LOC_CONST,
5449 (cu->language == language_cplus
5450 || cu->language == language_java)
5451 ? &cu->objfile->global_psymbols
5452 : &cu->objfile->static_psymbols,
5453 0, (CORE_ADDR) 0, cu->language, cu->objfile);
5455 info_ptr = locate_pdi_sibling (part_die, info_ptr, abfd, cu);
5459 /* We'll save this DIE so link it in. */
5460 part_die->die_parent = parent_die;
5461 part_die->die_sibling = NULL;
5462 part_die->die_child = NULL;
5464 if (last_die && last_die == parent_die)
5465 last_die->die_child = part_die;
5467 last_die->die_sibling = part_die;
5469 last_die = part_die;
5471 if (first_die == NULL)
5472 first_die = part_die;
5474 /* Maybe add the DIE to the hash table. Not all DIEs that we
5475 find interesting need to be in the hash table, because we
5476 also have the parent/sibling/child chains; only those that we
5477 might refer to by offset later during partial symbol reading.
5479 For now this means things that might have be the target of a
5480 DW_AT_specification, DW_AT_abstract_origin, or
5481 DW_AT_extension. DW_AT_extension will refer only to
5482 namespaces; DW_AT_abstract_origin refers to functions (and
5483 many things under the function DIE, but we do not recurse
5484 into function DIEs during partial symbol reading) and
5485 possibly variables as well; DW_AT_specification refers to
5486 declarations. Declarations ought to have the DW_AT_declaration
5487 flag. It happens that GCC forgets to put it in sometimes, but
5488 only for functions, not for types.
5490 Adding more things than necessary to the hash table is harmless
5491 except for the performance cost. Adding too few will result in
5492 wasted time in find_partial_die, when we reread the compilation
5493 unit with load_all_dies set. */
5496 || abbrev->tag == DW_TAG_subprogram
5497 || abbrev->tag == DW_TAG_variable
5498 || abbrev->tag == DW_TAG_namespace
5499 || part_die->is_declaration)
5503 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
5504 part_die->offset, INSERT);
5508 part_die = obstack_alloc (&cu->comp_unit_obstack,
5509 sizeof (struct partial_die_info));
5511 /* For some DIEs we want to follow their children (if any). For C
5512 we have no reason to follow the children of structures; for other
5513 languages we have to, both so that we can get at method physnames
5514 to infer fully qualified class names, and for DW_AT_specification. */
5515 if (last_die->has_children
5517 || last_die->tag == DW_TAG_namespace
5518 || last_die->tag == DW_TAG_enumeration_type
5519 || (cu->language != language_c
5520 && (last_die->tag == DW_TAG_class_type
5521 || last_die->tag == DW_TAG_structure_type
5522 || last_die->tag == DW_TAG_union_type))))
5525 parent_die = last_die;
5529 /* Otherwise we skip to the next sibling, if any. */
5530 info_ptr = locate_pdi_sibling (last_die, info_ptr, abfd, cu);
5532 /* Back to the top, do it again. */
5536 /* Read a minimal amount of information into the minimal die structure. */
5539 read_partial_die (struct partial_die_info *part_die,
5540 struct abbrev_info *abbrev,
5541 unsigned int abbrev_len, bfd *abfd,
5542 gdb_byte *info_ptr, struct dwarf2_cu *cu)
5544 unsigned int bytes_read, i;
5545 struct attribute attr;
5546 int has_low_pc_attr = 0;
5547 int has_high_pc_attr = 0;
5549 memset (part_die, 0, sizeof (struct partial_die_info));
5551 part_die->offset = info_ptr - dwarf2_per_objfile->info_buffer;
5553 info_ptr += abbrev_len;
5558 part_die->tag = abbrev->tag;
5559 part_die->has_children = abbrev->has_children;
5561 for (i = 0; i < abbrev->num_attrs; ++i)
5563 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
5565 /* Store the data if it is of an attribute we want to keep in a
5566 partial symbol table. */
5571 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5572 if (part_die->name == NULL)
5573 part_die->name = DW_STRING (&attr);
5575 case DW_AT_comp_dir:
5576 if (part_die->dirname == NULL)
5577 part_die->dirname = DW_STRING (&attr);
5579 case DW_AT_MIPS_linkage_name:
5580 part_die->name = DW_STRING (&attr);
5583 has_low_pc_attr = 1;
5584 part_die->lowpc = DW_ADDR (&attr);
5587 has_high_pc_attr = 1;
5588 part_die->highpc = DW_ADDR (&attr);
5591 if (dwarf2_ranges_read (DW_UNSND (&attr), &part_die->lowpc,
5592 &part_die->highpc, cu))
5593 has_low_pc_attr = has_high_pc_attr = 1;
5595 case DW_AT_location:
5596 /* Support the .debug_loc offsets */
5597 if (attr_form_is_block (&attr))
5599 part_die->locdesc = DW_BLOCK (&attr);
5601 else if (attr.form == DW_FORM_data4 || attr.form == DW_FORM_data8)
5603 dwarf2_complex_location_expr_complaint ();
5607 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5608 "partial symbol information");
5611 case DW_AT_language:
5612 part_die->language = DW_UNSND (&attr);
5614 case DW_AT_external:
5615 part_die->is_external = DW_UNSND (&attr);
5617 case DW_AT_declaration:
5618 part_die->is_declaration = DW_UNSND (&attr);
5621 part_die->has_type = 1;
5623 case DW_AT_abstract_origin:
5624 case DW_AT_specification:
5625 case DW_AT_extension:
5626 part_die->has_specification = 1;
5627 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr, cu);
5630 /* Ignore absolute siblings, they might point outside of
5631 the current compile unit. */
5632 if (attr.form == DW_FORM_ref_addr)
5633 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
5635 part_die->sibling = dwarf2_per_objfile->info_buffer
5636 + dwarf2_get_ref_die_offset (&attr, cu);
5638 case DW_AT_stmt_list:
5639 part_die->has_stmt_list = 1;
5640 part_die->line_offset = DW_UNSND (&attr);
5642 case DW_AT_byte_size:
5643 part_die->has_byte_size = 1;
5645 case DW_AT_calling_convention:
5646 /* DWARF doesn't provide a way to identify a program's source-level
5647 entry point. DW_AT_calling_convention attributes are only meant
5648 to describe functions' calling conventions.
5650 However, because it's a necessary piece of information in
5651 Fortran, and because DW_CC_program is the only piece of debugging
5652 information whose definition refers to a 'main program' at all,
5653 several compilers have begun marking Fortran main programs with
5654 DW_CC_program --- even when those functions use the standard
5655 calling conventions.
5657 So until DWARF specifies a way to provide this information and
5658 compilers pick up the new representation, we'll support this
5660 if (DW_UNSND (&attr) == DW_CC_program
5661 && cu->language == language_fortran)
5662 set_main_name (part_die->name);
5669 /* When using the GNU linker, .gnu.linkonce. sections are used to
5670 eliminate duplicate copies of functions and vtables and such.
5671 The linker will arbitrarily choose one and discard the others.
5672 The AT_*_pc values for such functions refer to local labels in
5673 these sections. If the section from that file was discarded, the
5674 labels are not in the output, so the relocs get a value of 0.
5675 If this is a discarded function, mark the pc bounds as invalid,
5676 so that GDB will ignore it. */
5677 if (has_low_pc_attr && has_high_pc_attr
5678 && part_die->lowpc < part_die->highpc
5679 && (part_die->lowpc != 0
5680 || dwarf2_per_objfile->has_section_at_zero))
5681 part_die->has_pc_info = 1;
5685 /* Find a cached partial DIE at OFFSET in CU. */
5687 static struct partial_die_info *
5688 find_partial_die_in_comp_unit (unsigned long offset, struct dwarf2_cu *cu)
5690 struct partial_die_info *lookup_die = NULL;
5691 struct partial_die_info part_die;
5693 part_die.offset = offset;
5694 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
5699 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5701 static struct partial_die_info *
5702 find_partial_die (unsigned long offset, struct dwarf2_cu *cu)
5704 struct dwarf2_per_cu_data *per_cu = NULL;
5705 struct partial_die_info *pd = NULL;
5707 if (offset >= cu->header.offset
5708 && offset < cu->header.offset + cu->header.length)
5710 pd = find_partial_die_in_comp_unit (offset, cu);
5715 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
5717 if (per_cu->cu == NULL)
5719 load_comp_unit (per_cu, cu->objfile);
5720 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
5721 dwarf2_per_objfile->read_in_chain = per_cu;
5724 per_cu->cu->last_used = 0;
5725 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
5727 if (pd == NULL && per_cu->load_all_dies == 0)
5729 struct cleanup *back_to;
5730 struct partial_die_info comp_unit_die;
5731 struct abbrev_info *abbrev;
5732 unsigned int bytes_read;
5735 per_cu->load_all_dies = 1;
5737 /* Re-read the DIEs. */
5738 back_to = make_cleanup (null_cleanup, 0);
5739 if (per_cu->cu->dwarf2_abbrevs == NULL)
5741 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
5742 back_to = make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
5744 info_ptr = per_cu->cu->header.first_die_ptr;
5745 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
5746 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
5747 per_cu->cu->objfile->obfd, info_ptr,
5749 if (comp_unit_die.has_children)
5750 load_partial_dies (per_cu->cu->objfile->obfd, info_ptr, 0, per_cu->cu);
5751 do_cleanups (back_to);
5753 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
5757 internal_error (__FILE__, __LINE__,
5758 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5759 offset, bfd_get_filename (cu->objfile->obfd));
5763 /* Adjust PART_DIE before generating a symbol for it. This function
5764 may set the is_external flag or change the DIE's name. */
5767 fixup_partial_die (struct partial_die_info *part_die,
5768 struct dwarf2_cu *cu)
5770 /* If we found a reference attribute and the DIE has no name, try
5771 to find a name in the referred to DIE. */
5773 if (part_die->name == NULL && part_die->has_specification)
5775 struct partial_die_info *spec_die;
5777 spec_die = find_partial_die (part_die->spec_offset, cu);
5779 fixup_partial_die (spec_die, cu);
5783 part_die->name = spec_die->name;
5785 /* Copy DW_AT_external attribute if it is set. */
5786 if (spec_die->is_external)
5787 part_die->is_external = spec_die->is_external;
5791 /* Set default names for some unnamed DIEs. */
5792 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
5793 || part_die->tag == DW_TAG_class_type))
5794 part_die->name = "(anonymous class)";
5796 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
5797 part_die->name = "(anonymous namespace)";
5799 if (part_die->tag == DW_TAG_structure_type
5800 || part_die->tag == DW_TAG_class_type
5801 || part_die->tag == DW_TAG_union_type)
5802 guess_structure_name (part_die, cu);
5805 /* Read the die from the .debug_info section buffer. Set DIEP to
5806 point to a newly allocated die with its information, except for its
5807 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5808 whether the die has children or not. */
5811 read_full_die (struct die_info **diep, bfd *abfd, gdb_byte *info_ptr,
5812 struct dwarf2_cu *cu, int *has_children)
5814 unsigned int abbrev_number, bytes_read, i, offset;
5815 struct abbrev_info *abbrev;
5816 struct die_info *die;
5818 offset = info_ptr - dwarf2_per_objfile->info_buffer;
5819 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5820 info_ptr += bytes_read;
5823 die = dwarf_alloc_die ();
5825 die->abbrev = abbrev_number;
5832 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
5835 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5837 bfd_get_filename (abfd));
5839 die = dwarf_alloc_die ();
5840 die->offset = offset;
5841 die->tag = abbrev->tag;
5842 die->abbrev = abbrev_number;
5845 die->num_attrs = abbrev->num_attrs;
5846 die->attrs = (struct attribute *)
5847 xmalloc (die->num_attrs * sizeof (struct attribute));
5849 for (i = 0; i < abbrev->num_attrs; ++i)
5851 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
5852 abfd, info_ptr, cu);
5854 /* If this attribute is an absolute reference to a different
5855 compilation unit, make sure that compilation unit is loaded
5857 if (die->attrs[i].form == DW_FORM_ref_addr
5858 && (DW_ADDR (&die->attrs[i]) < cu->header.offset
5859 || (DW_ADDR (&die->attrs[i])
5860 >= cu->header.offset + cu->header.length)))
5862 struct dwarf2_per_cu_data *per_cu;
5863 per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (&die->attrs[i]),
5866 /* Mark the dependence relation so that we don't flush PER_CU
5868 dwarf2_add_dependence (cu, per_cu);
5870 /* If it's already on the queue, we have nothing to do. */
5874 /* If the compilation unit is already loaded, just mark it as
5876 if (per_cu->cu != NULL)
5878 per_cu->cu->last_used = 0;
5882 /* Add it to the queue. */
5883 queue_comp_unit (per_cu);
5888 *has_children = abbrev->has_children;
5892 /* Read an attribute value described by an attribute form. */
5895 read_attribute_value (struct attribute *attr, unsigned form,
5896 bfd *abfd, gdb_byte *info_ptr,
5897 struct dwarf2_cu *cu)
5899 struct comp_unit_head *cu_header = &cu->header;
5900 unsigned int bytes_read;
5901 struct dwarf_block *blk;
5907 case DW_FORM_ref_addr:
5908 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
5909 info_ptr += bytes_read;
5911 case DW_FORM_block2:
5912 blk = dwarf_alloc_block (cu);
5913 blk->size = read_2_bytes (abfd, info_ptr);
5915 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5916 info_ptr += blk->size;
5917 DW_BLOCK (attr) = blk;
5919 case DW_FORM_block4:
5920 blk = dwarf_alloc_block (cu);
5921 blk->size = read_4_bytes (abfd, info_ptr);
5923 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5924 info_ptr += blk->size;
5925 DW_BLOCK (attr) = blk;
5928 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
5932 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
5936 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
5939 case DW_FORM_string:
5940 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
5941 info_ptr += bytes_read;
5944 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
5946 info_ptr += bytes_read;
5949 blk = dwarf_alloc_block (cu);
5950 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5951 info_ptr += bytes_read;
5952 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5953 info_ptr += blk->size;
5954 DW_BLOCK (attr) = blk;
5956 case DW_FORM_block1:
5957 blk = dwarf_alloc_block (cu);
5958 blk->size = read_1_byte (abfd, info_ptr);
5960 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
5961 info_ptr += blk->size;
5962 DW_BLOCK (attr) = blk;
5965 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
5969 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
5973 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
5974 info_ptr += bytes_read;
5977 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
5978 info_ptr += bytes_read;
5981 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
5985 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
5989 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
5993 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
5996 case DW_FORM_ref_udata:
5997 DW_ADDR (attr) = (cu->header.offset
5998 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
5999 info_ptr += bytes_read;
6001 case DW_FORM_indirect:
6002 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6003 info_ptr += bytes_read;
6004 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
6007 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6008 dwarf_form_name (form),
6009 bfd_get_filename (abfd));
6014 /* Read an attribute described by an abbreviated attribute. */
6017 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
6018 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
6020 attr->name = abbrev->name;
6021 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
6024 /* read dwarf information from a buffer */
6027 read_1_byte (bfd *abfd, gdb_byte *buf)
6029 return bfd_get_8 (abfd, buf);
6033 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
6035 return bfd_get_signed_8 (abfd, buf);
6039 read_2_bytes (bfd *abfd, gdb_byte *buf)
6041 return bfd_get_16 (abfd, buf);
6045 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
6047 return bfd_get_signed_16 (abfd, buf);
6051 read_4_bytes (bfd *abfd, gdb_byte *buf)
6053 return bfd_get_32 (abfd, buf);
6057 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
6059 return bfd_get_signed_32 (abfd, buf);
6062 static unsigned long
6063 read_8_bytes (bfd *abfd, gdb_byte *buf)
6065 return bfd_get_64 (abfd, buf);
6069 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
6070 unsigned int *bytes_read)
6072 struct comp_unit_head *cu_header = &cu->header;
6073 CORE_ADDR retval = 0;
6075 if (cu_header->signed_addr_p)
6077 switch (cu_header->addr_size)
6080 retval = bfd_get_signed_16 (abfd, buf);
6083 retval = bfd_get_signed_32 (abfd, buf);
6086 retval = bfd_get_signed_64 (abfd, buf);
6089 internal_error (__FILE__, __LINE__,
6090 _("read_address: bad switch, signed [in module %s]"),
6091 bfd_get_filename (abfd));
6096 switch (cu_header->addr_size)
6099 retval = bfd_get_16 (abfd, buf);
6102 retval = bfd_get_32 (abfd, buf);
6105 retval = bfd_get_64 (abfd, buf);
6108 internal_error (__FILE__, __LINE__,
6109 _("read_address: bad switch, unsigned [in module %s]"),
6110 bfd_get_filename (abfd));
6114 *bytes_read = cu_header->addr_size;
6118 /* Read the initial length from a section. The (draft) DWARF 3
6119 specification allows the initial length to take up either 4 bytes
6120 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6121 bytes describe the length and all offsets will be 8 bytes in length
6124 An older, non-standard 64-bit format is also handled by this
6125 function. The older format in question stores the initial length
6126 as an 8-byte quantity without an escape value. Lengths greater
6127 than 2^32 aren't very common which means that the initial 4 bytes
6128 is almost always zero. Since a length value of zero doesn't make
6129 sense for the 32-bit format, this initial zero can be considered to
6130 be an escape value which indicates the presence of the older 64-bit
6131 format. As written, the code can't detect (old format) lengths
6132 greater than 4GB. If it becomes necessary to handle lengths
6133 somewhat larger than 4GB, we could allow other small values (such
6134 as the non-sensical values of 1, 2, and 3) to also be used as
6135 escape values indicating the presence of the old format.
6137 The value returned via bytes_read should be used to increment the
6138 relevant pointer after calling read_initial_length().
6140 As a side effect, this function sets the fields initial_length_size
6141 and offset_size in cu_header to the values appropriate for the
6142 length field. (The format of the initial length field determines
6143 the width of file offsets to be fetched later with read_offset().)
6145 [ Note: read_initial_length() and read_offset() are based on the
6146 document entitled "DWARF Debugging Information Format", revision
6147 3, draft 8, dated November 19, 2001. This document was obtained
6150 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6152 This document is only a draft and is subject to change. (So beware.)
6154 Details regarding the older, non-standard 64-bit format were
6155 determined empirically by examining 64-bit ELF files produced by
6156 the SGI toolchain on an IRIX 6.5 machine.
6158 - Kevin, July 16, 2002
6162 read_initial_length (bfd *abfd, gdb_byte *buf, struct comp_unit_head *cu_header,
6163 unsigned int *bytes_read)
6165 LONGEST length = bfd_get_32 (abfd, buf);
6167 if (length == 0xffffffff)
6169 length = bfd_get_64 (abfd, buf + 4);
6172 else if (length == 0)
6174 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6175 length = bfd_get_64 (abfd, buf);
6185 gdb_assert (cu_header->initial_length_size == 0
6186 || cu_header->initial_length_size == 4
6187 || cu_header->initial_length_size == 8
6188 || cu_header->initial_length_size == 12);
6190 if (cu_header->initial_length_size != 0
6191 && cu_header->initial_length_size != *bytes_read)
6192 complaint (&symfile_complaints,
6193 _("intermixed 32-bit and 64-bit DWARF sections"));
6195 cu_header->initial_length_size = *bytes_read;
6196 cu_header->offset_size = (*bytes_read == 4) ? 4 : 8;
6202 /* Read an offset from the data stream. The size of the offset is
6203 given by cu_header->offset_size. */
6206 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
6207 unsigned int *bytes_read)
6211 switch (cu_header->offset_size)
6214 retval = bfd_get_32 (abfd, buf);
6218 retval = bfd_get_64 (abfd, buf);
6222 internal_error (__FILE__, __LINE__,
6223 _("read_offset: bad switch [in module %s]"),
6224 bfd_get_filename (abfd));
6231 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
6233 /* If the size of a host char is 8 bits, we can return a pointer
6234 to the buffer, otherwise we have to copy the data to a buffer
6235 allocated on the temporary obstack. */
6236 gdb_assert (HOST_CHAR_BIT == 8);
6241 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6243 /* If the size of a host char is 8 bits, we can return a pointer
6244 to the string, otherwise we have to copy the string to a buffer
6245 allocated on the temporary obstack. */
6246 gdb_assert (HOST_CHAR_BIT == 8);
6249 *bytes_read_ptr = 1;
6252 *bytes_read_ptr = strlen ((char *) buf) + 1;
6253 return (char *) buf;
6257 read_indirect_string (bfd *abfd, gdb_byte *buf,
6258 const struct comp_unit_head *cu_header,
6259 unsigned int *bytes_read_ptr)
6261 LONGEST str_offset = read_offset (abfd, buf, cu_header,
6264 if (dwarf2_per_objfile->str_buffer == NULL)
6266 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6267 bfd_get_filename (abfd));
6270 if (str_offset >= dwarf2_per_objfile->str_size)
6272 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6273 bfd_get_filename (abfd));
6276 gdb_assert (HOST_CHAR_BIT == 8);
6277 if (dwarf2_per_objfile->str_buffer[str_offset] == '\0')
6279 return (char *) (dwarf2_per_objfile->str_buffer + str_offset);
6282 static unsigned long
6283 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6285 unsigned long result;
6286 unsigned int num_read;
6296 byte = bfd_get_8 (abfd, buf);
6299 result |= ((unsigned long)(byte & 127) << shift);
6300 if ((byte & 128) == 0)
6306 *bytes_read_ptr = num_read;
6311 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
6314 int i, shift, num_read;
6323 byte = bfd_get_8 (abfd, buf);
6326 result |= ((long)(byte & 127) << shift);
6328 if ((byte & 128) == 0)
6333 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
6334 result |= -(((long)1) << shift);
6335 *bytes_read_ptr = num_read;
6339 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6342 skip_leb128 (bfd *abfd, gdb_byte *buf)
6348 byte = bfd_get_8 (abfd, buf);
6350 if ((byte & 128) == 0)
6356 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
6362 cu->language = language_c;
6364 case DW_LANG_C_plus_plus:
6365 cu->language = language_cplus;
6367 case DW_LANG_Fortran77:
6368 case DW_LANG_Fortran90:
6369 case DW_LANG_Fortran95:
6370 cu->language = language_fortran;
6372 case DW_LANG_Mips_Assembler:
6373 cu->language = language_asm;
6376 cu->language = language_java;
6380 cu->language = language_ada;
6382 case DW_LANG_Modula2:
6383 cu->language = language_m2;
6385 case DW_LANG_Pascal83:
6386 cu->language = language_pascal;
6388 case DW_LANG_Cobol74:
6389 case DW_LANG_Cobol85:
6391 cu->language = language_minimal;
6394 cu->language_defn = language_def (cu->language);
6397 /* Return the named attribute or NULL if not there. */
6399 static struct attribute *
6400 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
6403 struct attribute *spec = NULL;
6405 for (i = 0; i < die->num_attrs; ++i)
6407 if (die->attrs[i].name == name)
6408 return &die->attrs[i];
6409 if (die->attrs[i].name == DW_AT_specification
6410 || die->attrs[i].name == DW_AT_abstract_origin)
6411 spec = &die->attrs[i];
6415 return dwarf2_attr (follow_die_ref (die, spec, cu), name, cu);
6420 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6421 and holds a non-zero value. This function should only be used for
6422 DW_FORM_flag attributes. */
6425 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
6427 struct attribute *attr = dwarf2_attr (die, name, cu);
6429 return (attr && DW_UNSND (attr));
6433 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
6435 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6436 which value is non-zero. However, we have to be careful with
6437 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6438 (via dwarf2_flag_true_p) follows this attribute. So we may
6439 end up accidently finding a declaration attribute that belongs
6440 to a different DIE referenced by the specification attribute,
6441 even though the given DIE does not have a declaration attribute. */
6442 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
6443 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
6446 /* Return the die giving the specification for DIE, if there is
6449 static struct die_info *
6450 die_specification (struct die_info *die, struct dwarf2_cu *cu)
6452 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, cu);
6454 if (spec_attr == NULL)
6457 return follow_die_ref (die, spec_attr, cu);
6460 /* Free the line_header structure *LH, and any arrays and strings it
6463 free_line_header (struct line_header *lh)
6465 if (lh->standard_opcode_lengths)
6466 xfree (lh->standard_opcode_lengths);
6468 /* Remember that all the lh->file_names[i].name pointers are
6469 pointers into debug_line_buffer, and don't need to be freed. */
6471 xfree (lh->file_names);
6473 /* Similarly for the include directory names. */
6474 if (lh->include_dirs)
6475 xfree (lh->include_dirs);
6481 /* Add an entry to LH's include directory table. */
6483 add_include_dir (struct line_header *lh, char *include_dir)
6485 /* Grow the array if necessary. */
6486 if (lh->include_dirs_size == 0)
6488 lh->include_dirs_size = 1; /* for testing */
6489 lh->include_dirs = xmalloc (lh->include_dirs_size
6490 * sizeof (*lh->include_dirs));
6492 else if (lh->num_include_dirs >= lh->include_dirs_size)
6494 lh->include_dirs_size *= 2;
6495 lh->include_dirs = xrealloc (lh->include_dirs,
6496 (lh->include_dirs_size
6497 * sizeof (*lh->include_dirs)));
6500 lh->include_dirs[lh->num_include_dirs++] = include_dir;
6504 /* Add an entry to LH's file name table. */
6506 add_file_name (struct line_header *lh,
6508 unsigned int dir_index,
6509 unsigned int mod_time,
6510 unsigned int length)
6512 struct file_entry *fe;
6514 /* Grow the array if necessary. */
6515 if (lh->file_names_size == 0)
6517 lh->file_names_size = 1; /* for testing */
6518 lh->file_names = xmalloc (lh->file_names_size
6519 * sizeof (*lh->file_names));
6521 else if (lh->num_file_names >= lh->file_names_size)
6523 lh->file_names_size *= 2;
6524 lh->file_names = xrealloc (lh->file_names,
6525 (lh->file_names_size
6526 * sizeof (*lh->file_names)));
6529 fe = &lh->file_names[lh->num_file_names++];
6531 fe->dir_index = dir_index;
6532 fe->mod_time = mod_time;
6533 fe->length = length;
6539 /* Read the statement program header starting at OFFSET in
6540 .debug_line, according to the endianness of ABFD. Return a pointer
6541 to a struct line_header, allocated using xmalloc.
6543 NOTE: the strings in the include directory and file name tables of
6544 the returned object point into debug_line_buffer, and must not be
6546 static struct line_header *
6547 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
6548 struct dwarf2_cu *cu)
6550 struct cleanup *back_to;
6551 struct line_header *lh;
6553 unsigned int bytes_read;
6555 char *cur_dir, *cur_file;
6557 if (dwarf2_per_objfile->line_buffer == NULL)
6559 complaint (&symfile_complaints, _("missing .debug_line section"));
6563 /* Make sure that at least there's room for the total_length field.
6564 That could be 12 bytes long, but we're just going to fudge that. */
6565 if (offset + 4 >= dwarf2_per_objfile->line_size)
6567 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6571 lh = xmalloc (sizeof (*lh));
6572 memset (lh, 0, sizeof (*lh));
6573 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
6576 line_ptr = dwarf2_per_objfile->line_buffer + offset;
6578 /* Read in the header. */
6580 read_initial_length (abfd, line_ptr, &cu->header, &bytes_read);
6581 line_ptr += bytes_read;
6582 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line_buffer
6583 + dwarf2_per_objfile->line_size))
6585 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6588 lh->statement_program_end = line_ptr + lh->total_length;
6589 lh->version = read_2_bytes (abfd, line_ptr);
6591 lh->header_length = read_offset (abfd, line_ptr, &cu->header, &bytes_read);
6592 line_ptr += bytes_read;
6593 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
6595 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
6597 lh->line_base = read_1_signed_byte (abfd, line_ptr);
6599 lh->line_range = read_1_byte (abfd, line_ptr);
6601 lh->opcode_base = read_1_byte (abfd, line_ptr);
6603 lh->standard_opcode_lengths
6604 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
6606 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
6607 for (i = 1; i < lh->opcode_base; ++i)
6609 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
6613 /* Read directory table. */
6614 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
6616 line_ptr += bytes_read;
6617 add_include_dir (lh, cur_dir);
6619 line_ptr += bytes_read;
6621 /* Read file name table. */
6622 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
6624 unsigned int dir_index, mod_time, length;
6626 line_ptr += bytes_read;
6627 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6628 line_ptr += bytes_read;
6629 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6630 line_ptr += bytes_read;
6631 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6632 line_ptr += bytes_read;
6634 add_file_name (lh, cur_file, dir_index, mod_time, length);
6636 line_ptr += bytes_read;
6637 lh->statement_program_start = line_ptr;
6639 if (line_ptr > (dwarf2_per_objfile->line_buffer
6640 + dwarf2_per_objfile->line_size))
6641 complaint (&symfile_complaints,
6642 _("line number info header doesn't fit in `.debug_line' section"));
6644 discard_cleanups (back_to);
6648 /* This function exists to work around a bug in certain compilers
6649 (particularly GCC 2.95), in which the first line number marker of a
6650 function does not show up until after the prologue, right before
6651 the second line number marker. This function shifts ADDRESS down
6652 to the beginning of the function if necessary, and is called on
6653 addresses passed to record_line. */
6656 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
6658 struct function_range *fn;
6660 /* Find the function_range containing address. */
6665 cu->cached_fn = cu->first_fn;
6669 if (fn->lowpc <= address && fn->highpc > address)
6675 while (fn && fn != cu->cached_fn)
6676 if (fn->lowpc <= address && fn->highpc > address)
6686 if (address != fn->lowpc)
6687 complaint (&symfile_complaints,
6688 _("misplaced first line number at 0x%lx for '%s'"),
6689 (unsigned long) address, fn->name);
6694 /* Decode the Line Number Program (LNP) for the given line_header
6695 structure and CU. The actual information extracted and the type
6696 of structures created from the LNP depends on the value of PST.
6698 1. If PST is NULL, then this procedure uses the data from the program
6699 to create all necessary symbol tables, and their linetables.
6700 The compilation directory of the file is passed in COMP_DIR,
6701 and must not be NULL.
6703 2. If PST is not NULL, this procedure reads the program to determine
6704 the list of files included by the unit represented by PST, and
6705 builds all the associated partial symbol tables. In this case,
6706 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6707 is not used to compute the full name of the symtab, and therefore
6708 omitting it when building the partial symtab does not introduce
6709 the potential for inconsistency - a partial symtab and its associated
6710 symbtab having a different fullname -). */
6713 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
6714 struct dwarf2_cu *cu, struct partial_symtab *pst)
6716 gdb_byte *line_ptr, *extended_end;
6718 unsigned int bytes_read, extended_len;
6719 unsigned char op_code, extended_op, adj_opcode;
6721 struct objfile *objfile = cu->objfile;
6722 const int decode_for_pst_p = (pst != NULL);
6723 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
6725 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
6727 line_ptr = lh->statement_program_start;
6728 line_end = lh->statement_program_end;
6730 /* Read the statement sequences until there's nothing left. */
6731 while (line_ptr < line_end)
6733 /* state machine registers */
6734 CORE_ADDR address = 0;
6735 unsigned int file = 1;
6736 unsigned int line = 1;
6737 unsigned int column = 0;
6738 int is_stmt = lh->default_is_stmt;
6739 int basic_block = 0;
6740 int end_sequence = 0;
6742 if (!decode_for_pst_p && lh->num_file_names >= file)
6744 /* Start a subfile for the current file of the state machine. */
6745 /* lh->include_dirs and lh->file_names are 0-based, but the
6746 directory and file name numbers in the statement program
6748 struct file_entry *fe = &lh->file_names[file - 1];
6752 dir = lh->include_dirs[fe->dir_index - 1];
6754 dwarf2_start_subfile (fe->name, dir, comp_dir);
6757 /* Decode the table. */
6758 while (!end_sequence)
6760 op_code = read_1_byte (abfd, line_ptr);
6763 if (op_code >= lh->opcode_base)
6765 /* Special operand. */
6766 adj_opcode = op_code - lh->opcode_base;
6767 address += (adj_opcode / lh->line_range)
6768 * lh->minimum_instruction_length;
6769 line += lh->line_base + (adj_opcode % lh->line_range);
6770 if (lh->num_file_names < file)
6771 dwarf2_debug_line_missing_file_complaint ();
6774 lh->file_names[file - 1].included_p = 1;
6775 if (!decode_for_pst_p)
6777 if (last_subfile != current_subfile)
6780 record_line (last_subfile, 0, address);
6781 last_subfile = current_subfile;
6783 /* Append row to matrix using current values. */
6784 record_line (current_subfile, line,
6785 check_cu_functions (address, cu));
6790 else switch (op_code)
6792 case DW_LNS_extended_op:
6793 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6794 line_ptr += bytes_read;
6795 extended_end = line_ptr + extended_len;
6796 extended_op = read_1_byte (abfd, line_ptr);
6798 switch (extended_op)
6800 case DW_LNE_end_sequence:
6803 if (lh->num_file_names < file)
6804 dwarf2_debug_line_missing_file_complaint ();
6807 lh->file_names[file - 1].included_p = 1;
6808 if (!decode_for_pst_p)
6809 record_line (current_subfile, 0, address);
6812 case DW_LNE_set_address:
6813 address = read_address (abfd, line_ptr, cu, &bytes_read);
6814 line_ptr += bytes_read;
6815 address += baseaddr;
6817 case DW_LNE_define_file:
6820 unsigned int dir_index, mod_time, length;
6822 cur_file = read_string (abfd, line_ptr, &bytes_read);
6823 line_ptr += bytes_read;
6825 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6826 line_ptr += bytes_read;
6828 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6829 line_ptr += bytes_read;
6831 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6832 line_ptr += bytes_read;
6833 add_file_name (lh, cur_file, dir_index, mod_time, length);
6837 complaint (&symfile_complaints,
6838 _("mangled .debug_line section"));
6841 /* Make sure that we parsed the extended op correctly. If e.g.
6842 we expected a different address size than the producer used,
6843 we may have read the wrong number of bytes. */
6844 if (line_ptr != extended_end)
6846 complaint (&symfile_complaints,
6847 _("mangled .debug_line section"));
6852 if (lh->num_file_names < file)
6853 dwarf2_debug_line_missing_file_complaint ();
6856 lh->file_names[file - 1].included_p = 1;
6857 if (!decode_for_pst_p)
6859 if (last_subfile != current_subfile)
6862 record_line (last_subfile, 0, address);
6863 last_subfile = current_subfile;
6865 record_line (current_subfile, line,
6866 check_cu_functions (address, cu));
6871 case DW_LNS_advance_pc:
6872 address += lh->minimum_instruction_length
6873 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6874 line_ptr += bytes_read;
6876 case DW_LNS_advance_line:
6877 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
6878 line_ptr += bytes_read;
6880 case DW_LNS_set_file:
6882 /* The arrays lh->include_dirs and lh->file_names are
6883 0-based, but the directory and file name numbers in
6884 the statement program are 1-based. */
6885 struct file_entry *fe;
6888 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6889 line_ptr += bytes_read;
6890 if (lh->num_file_names < file)
6891 dwarf2_debug_line_missing_file_complaint ();
6894 fe = &lh->file_names[file - 1];
6896 dir = lh->include_dirs[fe->dir_index - 1];
6897 if (!decode_for_pst_p)
6899 last_subfile = current_subfile;
6900 dwarf2_start_subfile (fe->name, dir, comp_dir);
6905 case DW_LNS_set_column:
6906 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6907 line_ptr += bytes_read;
6909 case DW_LNS_negate_stmt:
6910 is_stmt = (!is_stmt);
6912 case DW_LNS_set_basic_block:
6915 /* Add to the address register of the state machine the
6916 address increment value corresponding to special opcode
6917 255. I.e., this value is scaled by the minimum
6918 instruction length since special opcode 255 would have
6919 scaled the the increment. */
6920 case DW_LNS_const_add_pc:
6921 address += (lh->minimum_instruction_length
6922 * ((255 - lh->opcode_base) / lh->line_range));
6924 case DW_LNS_fixed_advance_pc:
6925 address += read_2_bytes (abfd, line_ptr);
6930 /* Unknown standard opcode, ignore it. */
6933 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
6935 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
6936 line_ptr += bytes_read;
6943 if (decode_for_pst_p)
6947 /* Now that we're done scanning the Line Header Program, we can
6948 create the psymtab of each included file. */
6949 for (file_index = 0; file_index < lh->num_file_names; file_index++)
6950 if (lh->file_names[file_index].included_p == 1)
6952 const struct file_entry fe = lh->file_names [file_index];
6953 char *include_name = fe.name;
6954 char *dir_name = NULL;
6955 char *pst_filename = pst->filename;
6958 dir_name = lh->include_dirs[fe.dir_index - 1];
6960 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
6962 include_name = concat (dir_name, SLASH_STRING,
6963 include_name, (char *)NULL);
6964 make_cleanup (xfree, include_name);
6967 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
6969 pst_filename = concat (pst->dirname, SLASH_STRING,
6970 pst_filename, (char *)NULL);
6971 make_cleanup (xfree, pst_filename);
6974 if (strcmp (include_name, pst_filename) != 0)
6975 dwarf2_create_include_psymtab (include_name, pst, objfile);
6980 /* Make sure a symtab is created for every file, even files
6981 which contain only variables (i.e. no code with associated
6985 struct file_entry *fe;
6987 for (i = 0; i < lh->num_file_names; i++)
6990 fe = &lh->file_names[i];
6992 dir = lh->include_dirs[fe->dir_index - 1];
6993 dwarf2_start_subfile (fe->name, dir, comp_dir);
6995 /* Skip the main file; we don't need it, and it must be
6996 allocated last, so that it will show up before the
6997 non-primary symtabs in the objfile's symtab list. */
6998 if (current_subfile == first_subfile)
7001 if (current_subfile->symtab == NULL)
7002 current_subfile->symtab = allocate_symtab (current_subfile->name,
7004 fe->symtab = current_subfile->symtab;
7009 /* Start a subfile for DWARF. FILENAME is the name of the file and
7010 DIRNAME the name of the source directory which contains FILENAME
7011 or NULL if not known. COMP_DIR is the compilation directory for the
7012 linetable's compilation unit or NULL if not known.
7013 This routine tries to keep line numbers from identical absolute and
7014 relative file names in a common subfile.
7016 Using the `list' example from the GDB testsuite, which resides in
7017 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7018 of /srcdir/list0.c yields the following debugging information for list0.c:
7020 DW_AT_name: /srcdir/list0.c
7021 DW_AT_comp_dir: /compdir
7022 files.files[0].name: list0.h
7023 files.files[0].dir: /srcdir
7024 files.files[1].name: list0.c
7025 files.files[1].dir: /srcdir
7027 The line number information for list0.c has to end up in a single
7028 subfile, so that `break /srcdir/list0.c:1' works as expected.
7029 start_subfile will ensure that this happens provided that we pass the
7030 concatenation of files.files[1].dir and files.files[1].name as the
7034 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
7038 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7039 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7040 second argument to start_subfile. To be consistent, we do the
7041 same here. In order not to lose the line information directory,
7042 we concatenate it to the filename when it makes sense.
7043 Note that the Dwarf3 standard says (speaking of filenames in line
7044 information): ``The directory index is ignored for file names
7045 that represent full path names''. Thus ignoring dirname in the
7046 `else' branch below isn't an issue. */
7048 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
7049 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
7051 fullname = filename;
7053 start_subfile (fullname, comp_dir);
7055 if (fullname != filename)
7060 var_decode_location (struct attribute *attr, struct symbol *sym,
7061 struct dwarf2_cu *cu)
7063 struct objfile *objfile = cu->objfile;
7064 struct comp_unit_head *cu_header = &cu->header;
7066 /* NOTE drow/2003-01-30: There used to be a comment and some special
7067 code here to turn a symbol with DW_AT_external and a
7068 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7069 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7070 with some versions of binutils) where shared libraries could have
7071 relocations against symbols in their debug information - the
7072 minimal symbol would have the right address, but the debug info
7073 would not. It's no longer necessary, because we will explicitly
7074 apply relocations when we read in the debug information now. */
7076 /* A DW_AT_location attribute with no contents indicates that a
7077 variable has been optimized away. */
7078 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
7080 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
7084 /* Handle one degenerate form of location expression specially, to
7085 preserve GDB's previous behavior when section offsets are
7086 specified. If this is just a DW_OP_addr then mark this symbol
7089 if (attr_form_is_block (attr)
7090 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
7091 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
7095 SYMBOL_VALUE_ADDRESS (sym) =
7096 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
7097 fixup_symbol_section (sym, objfile);
7098 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
7099 SYMBOL_SECTION (sym));
7100 SYMBOL_CLASS (sym) = LOC_STATIC;
7104 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7105 expression evaluator, and use LOC_COMPUTED only when necessary
7106 (i.e. when the value of a register or memory location is
7107 referenced, or a thread-local block, etc.). Then again, it might
7108 not be worthwhile. I'm assuming that it isn't unless performance
7109 or memory numbers show me otherwise. */
7111 dwarf2_symbol_mark_computed (attr, sym, cu);
7112 SYMBOL_CLASS (sym) = LOC_COMPUTED;
7115 /* Given a pointer to a DWARF information entry, figure out if we need
7116 to make a symbol table entry for it, and if so, create a new entry
7117 and return a pointer to it.
7118 If TYPE is NULL, determine symbol type from the die, otherwise
7119 used the passed type. */
7121 static struct symbol *
7122 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
7124 struct objfile *objfile = cu->objfile;
7125 struct symbol *sym = NULL;
7127 struct attribute *attr = NULL;
7128 struct attribute *attr2 = NULL;
7131 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7133 if (die->tag != DW_TAG_namespace)
7134 name = dwarf2_linkage_name (die, cu);
7136 name = TYPE_NAME (type);
7140 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
7141 sizeof (struct symbol));
7142 OBJSTAT (objfile, n_syms++);
7143 memset (sym, 0, sizeof (struct symbol));
7145 /* Cache this symbol's name and the name's demangled form (if any). */
7146 SYMBOL_LANGUAGE (sym) = cu->language;
7147 SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
7149 /* Default assumptions.
7150 Use the passed type or decode it from the die. */
7151 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7152 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
7154 SYMBOL_TYPE (sym) = type;
7156 SYMBOL_TYPE (sym) = die_type (die, cu);
7157 attr = dwarf2_attr (die, DW_AT_decl_line, cu);
7160 SYMBOL_LINE (sym) = DW_UNSND (attr);
7163 attr = dwarf2_attr (die, DW_AT_decl_file, cu);
7166 int file_index = DW_UNSND (attr);
7167 if (cu->line_header == NULL
7168 || file_index > cu->line_header->num_file_names)
7169 complaint (&symfile_complaints,
7170 _("file index out of range"));
7171 else if (file_index > 0)
7173 struct file_entry *fe;
7174 fe = &cu->line_header->file_names[file_index - 1];
7175 SYMBOL_SYMTAB (sym) = fe->symtab;
7182 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
7185 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
7187 SYMBOL_CLASS (sym) = LOC_LABEL;
7189 case DW_TAG_subprogram:
7190 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7192 SYMBOL_CLASS (sym) = LOC_BLOCK;
7193 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7194 if (attr2 && (DW_UNSND (attr2) != 0))
7196 add_symbol_to_list (sym, &global_symbols);
7200 add_symbol_to_list (sym, cu->list_in_scope);
7203 case DW_TAG_variable:
7204 /* Compilation with minimal debug info may result in variables
7205 with missing type entries. Change the misleading `void' type
7206 to something sensible. */
7207 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
7209 = builtin_type (current_gdbarch)->nodebug_data_symbol;
7211 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7214 dwarf2_const_value (attr, sym, cu);
7215 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7216 if (attr2 && (DW_UNSND (attr2) != 0))
7217 add_symbol_to_list (sym, &global_symbols);
7219 add_symbol_to_list (sym, cu->list_in_scope);
7222 attr = dwarf2_attr (die, DW_AT_location, cu);
7225 var_decode_location (attr, sym, cu);
7226 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7227 if (attr2 && (DW_UNSND (attr2) != 0))
7228 add_symbol_to_list (sym, &global_symbols);
7230 add_symbol_to_list (sym, cu->list_in_scope);
7234 /* We do not know the address of this symbol.
7235 If it is an external symbol and we have type information
7236 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7237 The address of the variable will then be determined from
7238 the minimal symbol table whenever the variable is
7240 attr2 = dwarf2_attr (die, DW_AT_external, cu);
7241 if (attr2 && (DW_UNSND (attr2) != 0)
7242 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
7244 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
7245 add_symbol_to_list (sym, &global_symbols);
7249 case DW_TAG_formal_parameter:
7250 attr = dwarf2_attr (die, DW_AT_location, cu);
7253 var_decode_location (attr, sym, cu);
7254 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7255 if (SYMBOL_CLASS (sym) == LOC_COMPUTED)
7256 SYMBOL_CLASS (sym) = LOC_COMPUTED_ARG;
7258 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7261 dwarf2_const_value (attr, sym, cu);
7263 add_symbol_to_list (sym, cu->list_in_scope);
7265 case DW_TAG_unspecified_parameters:
7266 /* From varargs functions; gdb doesn't seem to have any
7267 interest in this information, so just ignore it for now.
7270 case DW_TAG_class_type:
7271 case DW_TAG_structure_type:
7272 case DW_TAG_union_type:
7273 case DW_TAG_set_type:
7274 case DW_TAG_enumeration_type:
7275 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7276 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
7278 /* Make sure that the symbol includes appropriate enclosing
7279 classes/namespaces in its name. These are calculated in
7280 read_structure_type, and the correct name is saved in
7283 if (cu->language == language_cplus
7284 || cu->language == language_java)
7286 struct type *type = SYMBOL_TYPE (sym);
7288 if (TYPE_TAG_NAME (type) != NULL)
7290 /* FIXME: carlton/2003-11-10: Should this use
7291 SYMBOL_SET_NAMES instead? (The same problem also
7292 arises further down in this function.) */
7293 /* The type's name is already allocated along with
7294 this objfile, so we don't need to duplicate it
7296 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
7301 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7302 really ever be static objects: otherwise, if you try
7303 to, say, break of a class's method and you're in a file
7304 which doesn't mention that class, it won't work unless
7305 the check for all static symbols in lookup_symbol_aux
7306 saves you. See the OtherFileClass tests in
7307 gdb.c++/namespace.exp. */
7309 struct pending **list_to_add;
7311 list_to_add = (cu->list_in_scope == &file_symbols
7312 && (cu->language == language_cplus
7313 || cu->language == language_java)
7314 ? &global_symbols : cu->list_in_scope);
7316 add_symbol_to_list (sym, list_to_add);
7318 /* The semantics of C++ state that "struct foo { ... }" also
7319 defines a typedef for "foo". A Java class declaration also
7320 defines a typedef for the class. Synthesize a typedef symbol
7321 so that "ptype foo" works as expected. */
7322 if (cu->language == language_cplus
7323 || cu->language == language_java
7324 || cu->language == language_ada)
7326 struct symbol *typedef_sym = (struct symbol *)
7327 obstack_alloc (&objfile->objfile_obstack,
7328 sizeof (struct symbol));
7329 *typedef_sym = *sym;
7330 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
7331 /* The symbol's name is already allocated along with
7332 this objfile, so we don't need to duplicate it for
7334 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
7335 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
7336 add_symbol_to_list (typedef_sym, list_to_add);
7340 case DW_TAG_typedef:
7341 if (processing_has_namespace_info
7342 && processing_current_prefix[0] != '\0')
7344 SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
7345 processing_current_prefix,
7348 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7349 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7350 add_symbol_to_list (sym, cu->list_in_scope);
7352 case DW_TAG_base_type:
7353 case DW_TAG_subrange_type:
7354 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7355 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
7356 add_symbol_to_list (sym, cu->list_in_scope);
7358 case DW_TAG_enumerator:
7359 if (processing_has_namespace_info
7360 && processing_current_prefix[0] != '\0')
7362 SYMBOL_LINKAGE_NAME (sym) = typename_concat (&objfile->objfile_obstack,
7363 processing_current_prefix,
7366 attr = dwarf2_attr (die, DW_AT_const_value, cu);
7369 dwarf2_const_value (attr, sym, cu);
7372 /* NOTE: carlton/2003-11-10: See comment above in the
7373 DW_TAG_class_type, etc. block. */
7375 struct pending **list_to_add;
7377 list_to_add = (cu->list_in_scope == &file_symbols
7378 && (cu->language == language_cplus
7379 || cu->language == language_java)
7380 ? &global_symbols : cu->list_in_scope);
7382 add_symbol_to_list (sym, list_to_add);
7385 case DW_TAG_namespace:
7386 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
7387 add_symbol_to_list (sym, &global_symbols);
7390 /* Not a tag we recognize. Hopefully we aren't processing
7391 trash data, but since we must specifically ignore things
7392 we don't recognize, there is nothing else we should do at
7394 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
7395 dwarf_tag_name (die->tag));
7402 /* Copy constant value from an attribute to a symbol. */
7405 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
7406 struct dwarf2_cu *cu)
7408 struct objfile *objfile = cu->objfile;
7409 struct comp_unit_head *cu_header = &cu->header;
7410 struct dwarf_block *blk;
7415 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
7416 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
7417 cu_header->addr_size,
7418 TYPE_LENGTH (SYMBOL_TYPE
7420 SYMBOL_VALUE_BYTES (sym) =
7421 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
7422 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7423 it's body - store_unsigned_integer. */
7424 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
7426 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
7428 case DW_FORM_block1:
7429 case DW_FORM_block2:
7430 case DW_FORM_block4:
7432 blk = DW_BLOCK (attr);
7433 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
7434 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym),
7436 TYPE_LENGTH (SYMBOL_TYPE
7438 SYMBOL_VALUE_BYTES (sym) =
7439 obstack_alloc (&objfile->objfile_obstack, blk->size);
7440 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
7441 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
7444 /* The DW_AT_const_value attributes are supposed to carry the
7445 symbol's value "represented as it would be on the target
7446 architecture." By the time we get here, it's already been
7447 converted to host endianness, so we just need to sign- or
7448 zero-extend it as appropriate. */
7450 dwarf2_const_value_data (attr, sym, 8);
7453 dwarf2_const_value_data (attr, sym, 16);
7456 dwarf2_const_value_data (attr, sym, 32);
7459 dwarf2_const_value_data (attr, sym, 64);
7463 SYMBOL_VALUE (sym) = DW_SND (attr);
7464 SYMBOL_CLASS (sym) = LOC_CONST;
7468 SYMBOL_VALUE (sym) = DW_UNSND (attr);
7469 SYMBOL_CLASS (sym) = LOC_CONST;
7473 complaint (&symfile_complaints,
7474 _("unsupported const value attribute form: '%s'"),
7475 dwarf_form_name (attr->form));
7476 SYMBOL_VALUE (sym) = 0;
7477 SYMBOL_CLASS (sym) = LOC_CONST;
7483 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7484 or zero-extend it as appropriate for the symbol's type. */
7486 dwarf2_const_value_data (struct attribute *attr,
7490 LONGEST l = DW_UNSND (attr);
7492 if (bits < sizeof (l) * 8)
7494 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
7495 l &= ((LONGEST) 1 << bits) - 1;
7497 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
7500 SYMBOL_VALUE (sym) = l;
7501 SYMBOL_CLASS (sym) = LOC_CONST;
7505 /* Return the type of the die in question using its DW_AT_type attribute. */
7507 static struct type *
7508 die_type (struct die_info *die, struct dwarf2_cu *cu)
7511 struct attribute *type_attr;
7512 struct die_info *type_die;
7514 type_attr = dwarf2_attr (die, DW_AT_type, cu);
7517 /* A missing DW_AT_type represents a void type. */
7518 return dwarf2_fundamental_type (cu->objfile, FT_VOID, cu);
7521 type_die = follow_die_ref (die, type_attr, cu);
7523 type = tag_type_to_type (type_die, cu);
7526 dump_die (type_die);
7527 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7533 /* Return the containing type of the die in question using its
7534 DW_AT_containing_type attribute. */
7536 static struct type *
7537 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
7539 struct type *type = NULL;
7540 struct attribute *type_attr;
7541 struct die_info *type_die = NULL;
7543 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
7546 type_die = follow_die_ref (die, type_attr, cu);
7547 type = tag_type_to_type (type_die, cu);
7552 dump_die (type_die);
7553 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7559 static struct type *
7560 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
7568 read_type_die (die, cu);
7572 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7580 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
7582 char *prefix = determine_prefix (die, cu);
7583 const char *old_prefix = processing_current_prefix;
7584 struct cleanup *back_to = make_cleanup (xfree, prefix);
7585 processing_current_prefix = prefix;
7589 case DW_TAG_class_type:
7590 case DW_TAG_structure_type:
7591 case DW_TAG_union_type:
7592 read_structure_type (die, cu);
7594 case DW_TAG_enumeration_type:
7595 read_enumeration_type (die, cu);
7597 case DW_TAG_subprogram:
7598 case DW_TAG_subroutine_type:
7599 read_subroutine_type (die, cu);
7601 case DW_TAG_array_type:
7602 read_array_type (die, cu);
7604 case DW_TAG_set_type:
7605 read_set_type (die, cu);
7607 case DW_TAG_pointer_type:
7608 read_tag_pointer_type (die, cu);
7610 case DW_TAG_ptr_to_member_type:
7611 read_tag_ptr_to_member_type (die, cu);
7613 case DW_TAG_reference_type:
7614 read_tag_reference_type (die, cu);
7616 case DW_TAG_const_type:
7617 read_tag_const_type (die, cu);
7619 case DW_TAG_volatile_type:
7620 read_tag_volatile_type (die, cu);
7622 case DW_TAG_string_type:
7623 read_tag_string_type (die, cu);
7625 case DW_TAG_typedef:
7626 read_typedef (die, cu);
7628 case DW_TAG_subrange_type:
7629 read_subrange_type (die, cu);
7631 case DW_TAG_base_type:
7632 read_base_type (die, cu);
7634 case DW_TAG_unspecified_type:
7635 read_unspecified_type (die, cu);
7638 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
7639 dwarf_tag_name (die->tag));
7643 processing_current_prefix = old_prefix;
7644 do_cleanups (back_to);
7647 /* Return the name of the namespace/class that DIE is defined within,
7648 or "" if we can't tell. The caller should xfree the result. */
7650 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7651 therein) for an example of how to use this function to deal with
7652 DW_AT_specification. */
7655 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
7657 struct die_info *parent;
7659 if (cu->language != language_cplus
7660 && cu->language != language_java)
7663 parent = die->parent;
7667 return xstrdup ("");
7671 switch (parent->tag) {
7672 case DW_TAG_namespace:
7674 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7675 before doing this check? */
7676 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
7678 return xstrdup (TYPE_TAG_NAME (parent->type));
7683 char *parent_prefix = determine_prefix (parent, cu);
7684 char *retval = typename_concat (NULL, parent_prefix,
7685 namespace_name (parent, &dummy,
7688 xfree (parent_prefix);
7693 case DW_TAG_class_type:
7694 case DW_TAG_structure_type:
7696 if (parent->type != NULL && TYPE_TAG_NAME (parent->type) != NULL)
7698 return xstrdup (TYPE_TAG_NAME (parent->type));
7702 const char *old_prefix = processing_current_prefix;
7703 char *new_prefix = determine_prefix (parent, cu);
7706 processing_current_prefix = new_prefix;
7707 retval = determine_class_name (parent, cu);
7708 processing_current_prefix = old_prefix;
7715 return determine_prefix (parent, cu);
7720 /* Return a newly-allocated string formed by concatenating PREFIX and
7721 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7722 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7723 perform an obconcat, otherwise allocate storage for the result. The CU argument
7724 is used to determine the language and hence, the appropriate separator. */
7726 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7729 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
7730 struct dwarf2_cu *cu)
7734 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
7736 else if (cu->language == language_java)
7743 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
7748 strcpy (retval, prefix);
7749 strcat (retval, sep);
7752 strcat (retval, suffix);
7758 /* We have an obstack. */
7759 return obconcat (obs, prefix, sep, suffix);
7763 static struct type *
7764 dwarf_base_type (int encoding, int size, struct dwarf2_cu *cu)
7766 struct objfile *objfile = cu->objfile;
7768 /* FIXME - this should not produce a new (struct type *)
7769 every time. It should cache base types. */
7773 case DW_ATE_address:
7774 type = dwarf2_fundamental_type (objfile, FT_VOID, cu);
7776 case DW_ATE_boolean:
7777 type = dwarf2_fundamental_type (objfile, FT_BOOLEAN, cu);
7779 case DW_ATE_complex_float:
7782 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_COMPLEX, cu);
7786 type = dwarf2_fundamental_type (objfile, FT_COMPLEX, cu);
7792 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_FLOAT, cu);
7796 type = dwarf2_fundamental_type (objfile, FT_FLOAT, cu);
7799 case DW_ATE_decimal_float:
7801 type = dwarf2_fundamental_type (objfile, FT_DBL_PREC_DECFLOAT, cu);
7803 type = dwarf2_fundamental_type (objfile, FT_EXT_PREC_DECFLOAT, cu);
7805 type = dwarf2_fundamental_type (objfile, FT_DECFLOAT, cu);
7811 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
7814 type = dwarf2_fundamental_type (objfile, FT_SIGNED_SHORT, cu);
7818 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
7822 case DW_ATE_signed_char:
7823 type = dwarf2_fundamental_type (objfile, FT_SIGNED_CHAR, cu);
7825 case DW_ATE_unsigned:
7829 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
7832 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_SHORT, cu);
7836 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_INTEGER, cu);
7840 case DW_ATE_unsigned_char:
7841 type = dwarf2_fundamental_type (objfile, FT_UNSIGNED_CHAR, cu);
7844 type = dwarf2_fundamental_type (objfile, FT_SIGNED_INTEGER, cu);
7851 copy_die (struct die_info *old_die)
7853 struct die_info *new_die;
7856 new_die = (struct die_info *) xmalloc (sizeof (struct die_info));
7857 memset (new_die, 0, sizeof (struct die_info));
7859 new_die->tag = old_die->tag;
7860 new_die->has_children = old_die->has_children;
7861 new_die->abbrev = old_die->abbrev;
7862 new_die->offset = old_die->offset;
7863 new_die->type = NULL;
7865 num_attrs = old_die->num_attrs;
7866 new_die->num_attrs = num_attrs;
7867 new_die->attrs = (struct attribute *)
7868 xmalloc (num_attrs * sizeof (struct attribute));
7870 for (i = 0; i < old_die->num_attrs; ++i)
7872 new_die->attrs[i].name = old_die->attrs[i].name;
7873 new_die->attrs[i].form = old_die->attrs[i].form;
7874 new_die->attrs[i].u.addr = old_die->attrs[i].u.addr;
7877 new_die->next = NULL;
7882 /* Return sibling of die, NULL if no sibling. */
7884 static struct die_info *
7885 sibling_die (struct die_info *die)
7887 return die->sibling;
7890 /* Get linkage name of a die, return NULL if not found. */
7893 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
7895 struct attribute *attr;
7897 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
7898 if (attr && DW_STRING (attr))
7899 return DW_STRING (attr);
7900 attr = dwarf2_attr (die, DW_AT_name, cu);
7901 if (attr && DW_STRING (attr))
7902 return DW_STRING (attr);
7906 /* Get name of a die, return NULL if not found. */
7909 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
7911 struct attribute *attr;
7913 attr = dwarf2_attr (die, DW_AT_name, cu);
7914 if (attr && DW_STRING (attr))
7915 return DW_STRING (attr);
7919 /* Return the die that this die in an extension of, or NULL if there
7922 static struct die_info *
7923 dwarf2_extension (struct die_info *die, struct dwarf2_cu *cu)
7925 struct attribute *attr;
7927 attr = dwarf2_attr (die, DW_AT_extension, cu);
7931 return follow_die_ref (die, attr, cu);
7934 /* Convert a DIE tag into its string name. */
7937 dwarf_tag_name (unsigned tag)
7941 case DW_TAG_padding:
7942 return "DW_TAG_padding";
7943 case DW_TAG_array_type:
7944 return "DW_TAG_array_type";
7945 case DW_TAG_class_type:
7946 return "DW_TAG_class_type";
7947 case DW_TAG_entry_point:
7948 return "DW_TAG_entry_point";
7949 case DW_TAG_enumeration_type:
7950 return "DW_TAG_enumeration_type";
7951 case DW_TAG_formal_parameter:
7952 return "DW_TAG_formal_parameter";
7953 case DW_TAG_imported_declaration:
7954 return "DW_TAG_imported_declaration";
7956 return "DW_TAG_label";
7957 case DW_TAG_lexical_block:
7958 return "DW_TAG_lexical_block";
7960 return "DW_TAG_member";
7961 case DW_TAG_pointer_type:
7962 return "DW_TAG_pointer_type";
7963 case DW_TAG_reference_type:
7964 return "DW_TAG_reference_type";
7965 case DW_TAG_compile_unit:
7966 return "DW_TAG_compile_unit";
7967 case DW_TAG_string_type:
7968 return "DW_TAG_string_type";
7969 case DW_TAG_structure_type:
7970 return "DW_TAG_structure_type";
7971 case DW_TAG_subroutine_type:
7972 return "DW_TAG_subroutine_type";
7973 case DW_TAG_typedef:
7974 return "DW_TAG_typedef";
7975 case DW_TAG_union_type:
7976 return "DW_TAG_union_type";
7977 case DW_TAG_unspecified_parameters:
7978 return "DW_TAG_unspecified_parameters";
7979 case DW_TAG_variant:
7980 return "DW_TAG_variant";
7981 case DW_TAG_common_block:
7982 return "DW_TAG_common_block";
7983 case DW_TAG_common_inclusion:
7984 return "DW_TAG_common_inclusion";
7985 case DW_TAG_inheritance:
7986 return "DW_TAG_inheritance";
7987 case DW_TAG_inlined_subroutine:
7988 return "DW_TAG_inlined_subroutine";
7990 return "DW_TAG_module";
7991 case DW_TAG_ptr_to_member_type:
7992 return "DW_TAG_ptr_to_member_type";
7993 case DW_TAG_set_type:
7994 return "DW_TAG_set_type";
7995 case DW_TAG_subrange_type:
7996 return "DW_TAG_subrange_type";
7997 case DW_TAG_with_stmt:
7998 return "DW_TAG_with_stmt";
7999 case DW_TAG_access_declaration:
8000 return "DW_TAG_access_declaration";
8001 case DW_TAG_base_type:
8002 return "DW_TAG_base_type";
8003 case DW_TAG_catch_block:
8004 return "DW_TAG_catch_block";
8005 case DW_TAG_const_type:
8006 return "DW_TAG_const_type";
8007 case DW_TAG_constant:
8008 return "DW_TAG_constant";
8009 case DW_TAG_enumerator:
8010 return "DW_TAG_enumerator";
8011 case DW_TAG_file_type:
8012 return "DW_TAG_file_type";
8014 return "DW_TAG_friend";
8015 case DW_TAG_namelist:
8016 return "DW_TAG_namelist";
8017 case DW_TAG_namelist_item:
8018 return "DW_TAG_namelist_item";
8019 case DW_TAG_packed_type:
8020 return "DW_TAG_packed_type";
8021 case DW_TAG_subprogram:
8022 return "DW_TAG_subprogram";
8023 case DW_TAG_template_type_param:
8024 return "DW_TAG_template_type_param";
8025 case DW_TAG_template_value_param:
8026 return "DW_TAG_template_value_param";
8027 case DW_TAG_thrown_type:
8028 return "DW_TAG_thrown_type";
8029 case DW_TAG_try_block:
8030 return "DW_TAG_try_block";
8031 case DW_TAG_variant_part:
8032 return "DW_TAG_variant_part";
8033 case DW_TAG_variable:
8034 return "DW_TAG_variable";
8035 case DW_TAG_volatile_type:
8036 return "DW_TAG_volatile_type";
8037 case DW_TAG_dwarf_procedure:
8038 return "DW_TAG_dwarf_procedure";
8039 case DW_TAG_restrict_type:
8040 return "DW_TAG_restrict_type";
8041 case DW_TAG_interface_type:
8042 return "DW_TAG_interface_type";
8043 case DW_TAG_namespace:
8044 return "DW_TAG_namespace";
8045 case DW_TAG_imported_module:
8046 return "DW_TAG_imported_module";
8047 case DW_TAG_unspecified_type:
8048 return "DW_TAG_unspecified_type";
8049 case DW_TAG_partial_unit:
8050 return "DW_TAG_partial_unit";
8051 case DW_TAG_imported_unit:
8052 return "DW_TAG_imported_unit";
8053 case DW_TAG_condition:
8054 return "DW_TAG_condition";
8055 case DW_TAG_shared_type:
8056 return "DW_TAG_shared_type";
8057 case DW_TAG_MIPS_loop:
8058 return "DW_TAG_MIPS_loop";
8059 case DW_TAG_HP_array_descriptor:
8060 return "DW_TAG_HP_array_descriptor";
8061 case DW_TAG_format_label:
8062 return "DW_TAG_format_label";
8063 case DW_TAG_function_template:
8064 return "DW_TAG_function_template";
8065 case DW_TAG_class_template:
8066 return "DW_TAG_class_template";
8067 case DW_TAG_GNU_BINCL:
8068 return "DW_TAG_GNU_BINCL";
8069 case DW_TAG_GNU_EINCL:
8070 return "DW_TAG_GNU_EINCL";
8071 case DW_TAG_upc_shared_type:
8072 return "DW_TAG_upc_shared_type";
8073 case DW_TAG_upc_strict_type:
8074 return "DW_TAG_upc_strict_type";
8075 case DW_TAG_upc_relaxed_type:
8076 return "DW_TAG_upc_relaxed_type";
8077 case DW_TAG_PGI_kanji_type:
8078 return "DW_TAG_PGI_kanji_type";
8079 case DW_TAG_PGI_interface_block:
8080 return "DW_TAG_PGI_interface_block";
8082 return "DW_TAG_<unknown>";
8086 /* Convert a DWARF attribute code into its string name. */
8089 dwarf_attr_name (unsigned attr)
8094 return "DW_AT_sibling";
8095 case DW_AT_location:
8096 return "DW_AT_location";
8098 return "DW_AT_name";
8099 case DW_AT_ordering:
8100 return "DW_AT_ordering";
8101 case DW_AT_subscr_data:
8102 return "DW_AT_subscr_data";
8103 case DW_AT_byte_size:
8104 return "DW_AT_byte_size";
8105 case DW_AT_bit_offset:
8106 return "DW_AT_bit_offset";
8107 case DW_AT_bit_size:
8108 return "DW_AT_bit_size";
8109 case DW_AT_element_list:
8110 return "DW_AT_element_list";
8111 case DW_AT_stmt_list:
8112 return "DW_AT_stmt_list";
8114 return "DW_AT_low_pc";
8116 return "DW_AT_high_pc";
8117 case DW_AT_language:
8118 return "DW_AT_language";
8120 return "DW_AT_member";
8122 return "DW_AT_discr";
8123 case DW_AT_discr_value:
8124 return "DW_AT_discr_value";
8125 case DW_AT_visibility:
8126 return "DW_AT_visibility";
8128 return "DW_AT_import";
8129 case DW_AT_string_length:
8130 return "DW_AT_string_length";
8131 case DW_AT_common_reference:
8132 return "DW_AT_common_reference";
8133 case DW_AT_comp_dir:
8134 return "DW_AT_comp_dir";
8135 case DW_AT_const_value:
8136 return "DW_AT_const_value";
8137 case DW_AT_containing_type:
8138 return "DW_AT_containing_type";
8139 case DW_AT_default_value:
8140 return "DW_AT_default_value";
8142 return "DW_AT_inline";
8143 case DW_AT_is_optional:
8144 return "DW_AT_is_optional";
8145 case DW_AT_lower_bound:
8146 return "DW_AT_lower_bound";
8147 case DW_AT_producer:
8148 return "DW_AT_producer";
8149 case DW_AT_prototyped:
8150 return "DW_AT_prototyped";
8151 case DW_AT_return_addr:
8152 return "DW_AT_return_addr";
8153 case DW_AT_start_scope:
8154 return "DW_AT_start_scope";
8155 case DW_AT_stride_size:
8156 return "DW_AT_stride_size";
8157 case DW_AT_upper_bound:
8158 return "DW_AT_upper_bound";
8159 case DW_AT_abstract_origin:
8160 return "DW_AT_abstract_origin";
8161 case DW_AT_accessibility:
8162 return "DW_AT_accessibility";
8163 case DW_AT_address_class:
8164 return "DW_AT_address_class";
8165 case DW_AT_artificial:
8166 return "DW_AT_artificial";
8167 case DW_AT_base_types:
8168 return "DW_AT_base_types";
8169 case DW_AT_calling_convention:
8170 return "DW_AT_calling_convention";
8172 return "DW_AT_count";
8173 case DW_AT_data_member_location:
8174 return "DW_AT_data_member_location";
8175 case DW_AT_decl_column:
8176 return "DW_AT_decl_column";
8177 case DW_AT_decl_file:
8178 return "DW_AT_decl_file";
8179 case DW_AT_decl_line:
8180 return "DW_AT_decl_line";
8181 case DW_AT_declaration:
8182 return "DW_AT_declaration";
8183 case DW_AT_discr_list:
8184 return "DW_AT_discr_list";
8185 case DW_AT_encoding:
8186 return "DW_AT_encoding";
8187 case DW_AT_external:
8188 return "DW_AT_external";
8189 case DW_AT_frame_base:
8190 return "DW_AT_frame_base";
8192 return "DW_AT_friend";
8193 case DW_AT_identifier_case:
8194 return "DW_AT_identifier_case";
8195 case DW_AT_macro_info:
8196 return "DW_AT_macro_info";
8197 case DW_AT_namelist_items:
8198 return "DW_AT_namelist_items";
8199 case DW_AT_priority:
8200 return "DW_AT_priority";
8202 return "DW_AT_segment";
8203 case DW_AT_specification:
8204 return "DW_AT_specification";
8205 case DW_AT_static_link:
8206 return "DW_AT_static_link";
8208 return "DW_AT_type";
8209 case DW_AT_use_location:
8210 return "DW_AT_use_location";
8211 case DW_AT_variable_parameter:
8212 return "DW_AT_variable_parameter";
8213 case DW_AT_virtuality:
8214 return "DW_AT_virtuality";
8215 case DW_AT_vtable_elem_location:
8216 return "DW_AT_vtable_elem_location";
8217 /* DWARF 3 values. */
8218 case DW_AT_allocated:
8219 return "DW_AT_allocated";
8220 case DW_AT_associated:
8221 return "DW_AT_associated";
8222 case DW_AT_data_location:
8223 return "DW_AT_data_location";
8225 return "DW_AT_stride";
8226 case DW_AT_entry_pc:
8227 return "DW_AT_entry_pc";
8228 case DW_AT_use_UTF8:
8229 return "DW_AT_use_UTF8";
8230 case DW_AT_extension:
8231 return "DW_AT_extension";
8233 return "DW_AT_ranges";
8234 case DW_AT_trampoline:
8235 return "DW_AT_trampoline";
8236 case DW_AT_call_column:
8237 return "DW_AT_call_column";
8238 case DW_AT_call_file:
8239 return "DW_AT_call_file";
8240 case DW_AT_call_line:
8241 return "DW_AT_call_line";
8242 case DW_AT_description:
8243 return "DW_AT_description";
8244 case DW_AT_binary_scale:
8245 return "DW_AT_binary_scale";
8246 case DW_AT_decimal_scale:
8247 return "DW_AT_decimal_scale";
8249 return "DW_AT_small";
8250 case DW_AT_decimal_sign:
8251 return "DW_AT_decimal_sign";
8252 case DW_AT_digit_count:
8253 return "DW_AT_digit_count";
8254 case DW_AT_picture_string:
8255 return "DW_AT_picture_string";
8257 return "DW_AT_mutable";
8258 case DW_AT_threads_scaled:
8259 return "DW_AT_threads_scaled";
8260 case DW_AT_explicit:
8261 return "DW_AT_explicit";
8262 case DW_AT_object_pointer:
8263 return "DW_AT_object_pointer";
8264 case DW_AT_endianity:
8265 return "DW_AT_endianity";
8266 case DW_AT_elemental:
8267 return "DW_AT_elemental";
8269 return "DW_AT_pure";
8270 case DW_AT_recursive:
8271 return "DW_AT_recursive";
8273 /* SGI/MIPS extensions. */
8274 case DW_AT_MIPS_fde:
8275 return "DW_AT_MIPS_fde";
8276 case DW_AT_MIPS_loop_begin:
8277 return "DW_AT_MIPS_loop_begin";
8278 case DW_AT_MIPS_tail_loop_begin:
8279 return "DW_AT_MIPS_tail_loop_begin";
8280 case DW_AT_MIPS_epilog_begin:
8281 return "DW_AT_MIPS_epilog_begin";
8282 case DW_AT_MIPS_loop_unroll_factor:
8283 return "DW_AT_MIPS_loop_unroll_factor";
8284 case DW_AT_MIPS_software_pipeline_depth:
8285 return "DW_AT_MIPS_software_pipeline_depth";
8286 case DW_AT_MIPS_linkage_name:
8287 return "DW_AT_MIPS_linkage_name";
8288 case DW_AT_MIPS_stride:
8289 return "DW_AT_MIPS_stride";
8290 case DW_AT_MIPS_abstract_name:
8291 return "DW_AT_MIPS_abstract_name";
8292 case DW_AT_MIPS_clone_origin:
8293 return "DW_AT_MIPS_clone_origin";
8294 case DW_AT_MIPS_has_inlines:
8295 return "DW_AT_MIPS_has_inlines";
8297 /* HP extensions. */
8298 case DW_AT_HP_block_index:
8299 return "DW_AT_HP_block_index";
8300 case DW_AT_HP_unmodifiable:
8301 return "DW_AT_HP_unmodifiable";
8302 case DW_AT_HP_actuals_stmt_list:
8303 return "DW_AT_HP_actuals_stmt_list";
8304 case DW_AT_HP_proc_per_section:
8305 return "DW_AT_HP_proc_per_section";
8306 case DW_AT_HP_raw_data_ptr:
8307 return "DW_AT_HP_raw_data_ptr";
8308 case DW_AT_HP_pass_by_reference:
8309 return "DW_AT_HP_pass_by_reference";
8310 case DW_AT_HP_opt_level:
8311 return "DW_AT_HP_opt_level";
8312 case DW_AT_HP_prof_version_id:
8313 return "DW_AT_HP_prof_version_id";
8314 case DW_AT_HP_opt_flags:
8315 return "DW_AT_HP_opt_flags";
8316 case DW_AT_HP_cold_region_low_pc:
8317 return "DW_AT_HP_cold_region_low_pc";
8318 case DW_AT_HP_cold_region_high_pc:
8319 return "DW_AT_HP_cold_region_high_pc";
8320 case DW_AT_HP_all_variables_modifiable:
8321 return "DW_AT_HP_all_variables_modifiable";
8322 case DW_AT_HP_linkage_name:
8323 return "DW_AT_HP_linkage_name";
8324 case DW_AT_HP_prof_flags:
8325 return "DW_AT_HP_prof_flags";
8326 /* GNU extensions. */
8327 case DW_AT_sf_names:
8328 return "DW_AT_sf_names";
8329 case DW_AT_src_info:
8330 return "DW_AT_src_info";
8331 case DW_AT_mac_info:
8332 return "DW_AT_mac_info";
8333 case DW_AT_src_coords:
8334 return "DW_AT_src_coords";
8335 case DW_AT_body_begin:
8336 return "DW_AT_body_begin";
8337 case DW_AT_body_end:
8338 return "DW_AT_body_end";
8339 case DW_AT_GNU_vector:
8340 return "DW_AT_GNU_vector";
8341 /* VMS extensions. */
8342 case DW_AT_VMS_rtnbeg_pd_address:
8343 return "DW_AT_VMS_rtnbeg_pd_address";
8344 /* UPC extension. */
8345 case DW_AT_upc_threads_scaled:
8346 return "DW_AT_upc_threads_scaled";
8347 /* PGI (STMicroelectronics) extensions. */
8348 case DW_AT_PGI_lbase:
8349 return "DW_AT_PGI_lbase";
8350 case DW_AT_PGI_soffset:
8351 return "DW_AT_PGI_soffset";
8352 case DW_AT_PGI_lstride:
8353 return "DW_AT_PGI_lstride";
8355 return "DW_AT_<unknown>";
8359 /* Convert a DWARF value form code into its string name. */
8362 dwarf_form_name (unsigned form)
8367 return "DW_FORM_addr";
8368 case DW_FORM_block2:
8369 return "DW_FORM_block2";
8370 case DW_FORM_block4:
8371 return "DW_FORM_block4";
8373 return "DW_FORM_data2";
8375 return "DW_FORM_data4";
8377 return "DW_FORM_data8";
8378 case DW_FORM_string:
8379 return "DW_FORM_string";
8381 return "DW_FORM_block";
8382 case DW_FORM_block1:
8383 return "DW_FORM_block1";
8385 return "DW_FORM_data1";
8387 return "DW_FORM_flag";
8389 return "DW_FORM_sdata";
8391 return "DW_FORM_strp";
8393 return "DW_FORM_udata";
8394 case DW_FORM_ref_addr:
8395 return "DW_FORM_ref_addr";
8397 return "DW_FORM_ref1";
8399 return "DW_FORM_ref2";
8401 return "DW_FORM_ref4";
8403 return "DW_FORM_ref8";
8404 case DW_FORM_ref_udata:
8405 return "DW_FORM_ref_udata";
8406 case DW_FORM_indirect:
8407 return "DW_FORM_indirect";
8409 return "DW_FORM_<unknown>";
8413 /* Convert a DWARF stack opcode into its string name. */
8416 dwarf_stack_op_name (unsigned op)
8421 return "DW_OP_addr";
8423 return "DW_OP_deref";
8425 return "DW_OP_const1u";
8427 return "DW_OP_const1s";
8429 return "DW_OP_const2u";
8431 return "DW_OP_const2s";
8433 return "DW_OP_const4u";
8435 return "DW_OP_const4s";
8437 return "DW_OP_const8u";
8439 return "DW_OP_const8s";
8441 return "DW_OP_constu";
8443 return "DW_OP_consts";
8447 return "DW_OP_drop";
8449 return "DW_OP_over";
8451 return "DW_OP_pick";
8453 return "DW_OP_swap";
8457 return "DW_OP_xderef";
8465 return "DW_OP_minus";
8477 return "DW_OP_plus";
8478 case DW_OP_plus_uconst:
8479 return "DW_OP_plus_uconst";
8485 return "DW_OP_shra";
8503 return "DW_OP_skip";
8505 return "DW_OP_lit0";
8507 return "DW_OP_lit1";
8509 return "DW_OP_lit2";
8511 return "DW_OP_lit3";
8513 return "DW_OP_lit4";
8515 return "DW_OP_lit5";
8517 return "DW_OP_lit6";
8519 return "DW_OP_lit7";
8521 return "DW_OP_lit8";
8523 return "DW_OP_lit9";
8525 return "DW_OP_lit10";
8527 return "DW_OP_lit11";
8529 return "DW_OP_lit12";
8531 return "DW_OP_lit13";
8533 return "DW_OP_lit14";
8535 return "DW_OP_lit15";
8537 return "DW_OP_lit16";
8539 return "DW_OP_lit17";
8541 return "DW_OP_lit18";
8543 return "DW_OP_lit19";
8545 return "DW_OP_lit20";
8547 return "DW_OP_lit21";
8549 return "DW_OP_lit22";
8551 return "DW_OP_lit23";
8553 return "DW_OP_lit24";
8555 return "DW_OP_lit25";
8557 return "DW_OP_lit26";
8559 return "DW_OP_lit27";
8561 return "DW_OP_lit28";
8563 return "DW_OP_lit29";
8565 return "DW_OP_lit30";
8567 return "DW_OP_lit31";
8569 return "DW_OP_reg0";
8571 return "DW_OP_reg1";
8573 return "DW_OP_reg2";
8575 return "DW_OP_reg3";
8577 return "DW_OP_reg4";
8579 return "DW_OP_reg5";
8581 return "DW_OP_reg6";
8583 return "DW_OP_reg7";
8585 return "DW_OP_reg8";
8587 return "DW_OP_reg9";
8589 return "DW_OP_reg10";
8591 return "DW_OP_reg11";
8593 return "DW_OP_reg12";
8595 return "DW_OP_reg13";
8597 return "DW_OP_reg14";
8599 return "DW_OP_reg15";
8601 return "DW_OP_reg16";
8603 return "DW_OP_reg17";
8605 return "DW_OP_reg18";
8607 return "DW_OP_reg19";
8609 return "DW_OP_reg20";
8611 return "DW_OP_reg21";
8613 return "DW_OP_reg22";
8615 return "DW_OP_reg23";
8617 return "DW_OP_reg24";
8619 return "DW_OP_reg25";
8621 return "DW_OP_reg26";
8623 return "DW_OP_reg27";
8625 return "DW_OP_reg28";
8627 return "DW_OP_reg29";
8629 return "DW_OP_reg30";
8631 return "DW_OP_reg31";
8633 return "DW_OP_breg0";
8635 return "DW_OP_breg1";
8637 return "DW_OP_breg2";
8639 return "DW_OP_breg3";
8641 return "DW_OP_breg4";
8643 return "DW_OP_breg5";
8645 return "DW_OP_breg6";
8647 return "DW_OP_breg7";
8649 return "DW_OP_breg8";
8651 return "DW_OP_breg9";
8653 return "DW_OP_breg10";
8655 return "DW_OP_breg11";
8657 return "DW_OP_breg12";
8659 return "DW_OP_breg13";
8661 return "DW_OP_breg14";
8663 return "DW_OP_breg15";
8665 return "DW_OP_breg16";
8667 return "DW_OP_breg17";
8669 return "DW_OP_breg18";
8671 return "DW_OP_breg19";
8673 return "DW_OP_breg20";
8675 return "DW_OP_breg21";
8677 return "DW_OP_breg22";
8679 return "DW_OP_breg23";
8681 return "DW_OP_breg24";
8683 return "DW_OP_breg25";
8685 return "DW_OP_breg26";
8687 return "DW_OP_breg27";
8689 return "DW_OP_breg28";
8691 return "DW_OP_breg29";
8693 return "DW_OP_breg30";
8695 return "DW_OP_breg31";
8697 return "DW_OP_regx";
8699 return "DW_OP_fbreg";
8701 return "DW_OP_bregx";
8703 return "DW_OP_piece";
8704 case DW_OP_deref_size:
8705 return "DW_OP_deref_size";
8706 case DW_OP_xderef_size:
8707 return "DW_OP_xderef_size";
8710 /* DWARF 3 extensions. */
8711 case DW_OP_push_object_address:
8712 return "DW_OP_push_object_address";
8714 return "DW_OP_call2";
8716 return "DW_OP_call4";
8717 case DW_OP_call_ref:
8718 return "DW_OP_call_ref";
8719 /* GNU extensions. */
8720 case DW_OP_form_tls_address:
8721 return "DW_OP_form_tls_address";
8722 case DW_OP_call_frame_cfa:
8723 return "DW_OP_call_frame_cfa";
8724 case DW_OP_bit_piece:
8725 return "DW_OP_bit_piece";
8726 case DW_OP_GNU_push_tls_address:
8727 return "DW_OP_GNU_push_tls_address";
8728 case DW_OP_GNU_uninit:
8729 return "DW_OP_GNU_uninit";
8730 /* HP extensions. */
8731 case DW_OP_HP_is_value:
8732 return "DW_OP_HP_is_value";
8733 case DW_OP_HP_fltconst4:
8734 return "DW_OP_HP_fltconst4";
8735 case DW_OP_HP_fltconst8:
8736 return "DW_OP_HP_fltconst8";
8737 case DW_OP_HP_mod_range:
8738 return "DW_OP_HP_mod_range";
8739 case DW_OP_HP_unmod_range:
8740 return "DW_OP_HP_unmod_range";
8742 return "DW_OP_HP_tls";
8744 return "OP_<unknown>";
8749 dwarf_bool_name (unsigned mybool)
8757 /* Convert a DWARF type code into its string name. */
8760 dwarf_type_encoding_name (unsigned enc)
8765 return "DW_ATE_void";
8766 case DW_ATE_address:
8767 return "DW_ATE_address";
8768 case DW_ATE_boolean:
8769 return "DW_ATE_boolean";
8770 case DW_ATE_complex_float:
8771 return "DW_ATE_complex_float";
8773 return "DW_ATE_float";
8775 return "DW_ATE_signed";
8776 case DW_ATE_signed_char:
8777 return "DW_ATE_signed_char";
8778 case DW_ATE_unsigned:
8779 return "DW_ATE_unsigned";
8780 case DW_ATE_unsigned_char:
8781 return "DW_ATE_unsigned_char";
8783 case DW_ATE_imaginary_float:
8784 return "DW_ATE_imaginary_float";
8785 case DW_ATE_packed_decimal:
8786 return "DW_ATE_packed_decimal";
8787 case DW_ATE_numeric_string:
8788 return "DW_ATE_numeric_string";
8790 return "DW_ATE_edited";
8791 case DW_ATE_signed_fixed:
8792 return "DW_ATE_signed_fixed";
8793 case DW_ATE_unsigned_fixed:
8794 return "DW_ATE_unsigned_fixed";
8795 case DW_ATE_decimal_float:
8796 return "DW_ATE_decimal_float";
8797 /* HP extensions. */
8798 case DW_ATE_HP_float80:
8799 return "DW_ATE_HP_float80";
8800 case DW_ATE_HP_complex_float80:
8801 return "DW_ATE_HP_complex_float80";
8802 case DW_ATE_HP_float128:
8803 return "DW_ATE_HP_float128";
8804 case DW_ATE_HP_complex_float128:
8805 return "DW_ATE_HP_complex_float128";
8806 case DW_ATE_HP_floathpintel:
8807 return "DW_ATE_HP_floathpintel";
8808 case DW_ATE_HP_imaginary_float80:
8809 return "DW_ATE_HP_imaginary_float80";
8810 case DW_ATE_HP_imaginary_float128:
8811 return "DW_ATE_HP_imaginary_float128";
8813 return "DW_ATE_<unknown>";
8817 /* Convert a DWARF call frame info operation to its string name. */
8821 dwarf_cfi_name (unsigned cfi_opc)
8825 case DW_CFA_advance_loc:
8826 return "DW_CFA_advance_loc";
8828 return "DW_CFA_offset";
8829 case DW_CFA_restore:
8830 return "DW_CFA_restore";
8832 return "DW_CFA_nop";
8833 case DW_CFA_set_loc:
8834 return "DW_CFA_set_loc";
8835 case DW_CFA_advance_loc1:
8836 return "DW_CFA_advance_loc1";
8837 case DW_CFA_advance_loc2:
8838 return "DW_CFA_advance_loc2";
8839 case DW_CFA_advance_loc4:
8840 return "DW_CFA_advance_loc4";
8841 case DW_CFA_offset_extended:
8842 return "DW_CFA_offset_extended";
8843 case DW_CFA_restore_extended:
8844 return "DW_CFA_restore_extended";
8845 case DW_CFA_undefined:
8846 return "DW_CFA_undefined";
8847 case DW_CFA_same_value:
8848 return "DW_CFA_same_value";
8849 case DW_CFA_register:
8850 return "DW_CFA_register";
8851 case DW_CFA_remember_state:
8852 return "DW_CFA_remember_state";
8853 case DW_CFA_restore_state:
8854 return "DW_CFA_restore_state";
8855 case DW_CFA_def_cfa:
8856 return "DW_CFA_def_cfa";
8857 case DW_CFA_def_cfa_register:
8858 return "DW_CFA_def_cfa_register";
8859 case DW_CFA_def_cfa_offset:
8860 return "DW_CFA_def_cfa_offset";
8862 case DW_CFA_def_cfa_expression:
8863 return "DW_CFA_def_cfa_expression";
8864 case DW_CFA_expression:
8865 return "DW_CFA_expression";
8866 case DW_CFA_offset_extended_sf:
8867 return "DW_CFA_offset_extended_sf";
8868 case DW_CFA_def_cfa_sf:
8869 return "DW_CFA_def_cfa_sf";
8870 case DW_CFA_def_cfa_offset_sf:
8871 return "DW_CFA_def_cfa_offset_sf";
8872 case DW_CFA_val_offset:
8873 return "DW_CFA_val_offset";
8874 case DW_CFA_val_offset_sf:
8875 return "DW_CFA_val_offset_sf";
8876 case DW_CFA_val_expression:
8877 return "DW_CFA_val_expression";
8878 /* SGI/MIPS specific. */
8879 case DW_CFA_MIPS_advance_loc8:
8880 return "DW_CFA_MIPS_advance_loc8";
8881 /* GNU extensions. */
8882 case DW_CFA_GNU_window_save:
8883 return "DW_CFA_GNU_window_save";
8884 case DW_CFA_GNU_args_size:
8885 return "DW_CFA_GNU_args_size";
8886 case DW_CFA_GNU_negative_offset_extended:
8887 return "DW_CFA_GNU_negative_offset_extended";
8889 return "DW_CFA_<unknown>";
8895 dump_die (struct die_info *die)
8899 fprintf_unfiltered (gdb_stderr, "Die: %s (abbrev = %d, offset = %d)\n",
8900 dwarf_tag_name (die->tag), die->abbrev, die->offset);
8901 fprintf_unfiltered (gdb_stderr, "\thas children: %s\n",
8902 dwarf_bool_name (die->child != NULL));
8904 fprintf_unfiltered (gdb_stderr, "\tattributes:\n");
8905 for (i = 0; i < die->num_attrs; ++i)
8907 fprintf_unfiltered (gdb_stderr, "\t\t%s (%s) ",
8908 dwarf_attr_name (die->attrs[i].name),
8909 dwarf_form_name (die->attrs[i].form));
8910 switch (die->attrs[i].form)
8912 case DW_FORM_ref_addr:
8914 fprintf_unfiltered (gdb_stderr, "address: ");
8915 deprecated_print_address_numeric (DW_ADDR (&die->attrs[i]), 1, gdb_stderr);
8917 case DW_FORM_block2:
8918 case DW_FORM_block4:
8920 case DW_FORM_block1:
8921 fprintf_unfiltered (gdb_stderr, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
8926 fprintf_unfiltered (gdb_stderr, "constant ref: %ld (adjusted)",
8927 (long) (DW_ADDR (&die->attrs[i])));
8935 fprintf_unfiltered (gdb_stderr, "constant: %ld", DW_UNSND (&die->attrs[i]));
8937 case DW_FORM_string:
8939 fprintf_unfiltered (gdb_stderr, "string: \"%s\"",
8940 DW_STRING (&die->attrs[i])
8941 ? DW_STRING (&die->attrs[i]) : "");
8944 if (DW_UNSND (&die->attrs[i]))
8945 fprintf_unfiltered (gdb_stderr, "flag: TRUE");
8947 fprintf_unfiltered (gdb_stderr, "flag: FALSE");
8949 case DW_FORM_indirect:
8950 /* the reader will have reduced the indirect form to
8951 the "base form" so this form should not occur */
8952 fprintf_unfiltered (gdb_stderr, "unexpected attribute form: DW_FORM_indirect");
8955 fprintf_unfiltered (gdb_stderr, "unsupported attribute form: %d.",
8956 die->attrs[i].form);
8958 fprintf_unfiltered (gdb_stderr, "\n");
8963 dump_die_list (struct die_info *die)
8968 if (die->child != NULL)
8969 dump_die_list (die->child);
8970 if (die->sibling != NULL)
8971 dump_die_list (die->sibling);
8976 store_in_ref_table (unsigned int offset, struct die_info *die,
8977 struct dwarf2_cu *cu)
8980 struct die_info *old;
8982 h = (offset % REF_HASH_SIZE);
8983 old = cu->die_ref_table[h];
8984 die->next_ref = old;
8985 cu->die_ref_table[h] = die;
8989 dwarf2_get_ref_die_offset (struct attribute *attr, struct dwarf2_cu *cu)
8991 unsigned int result = 0;
8995 case DW_FORM_ref_addr:
9000 case DW_FORM_ref_udata:
9001 result = DW_ADDR (attr);
9004 complaint (&symfile_complaints,
9005 _("unsupported die ref attribute form: '%s'"),
9006 dwarf_form_name (attr->form));
9011 /* Return the constant value held by the given attribute. Return -1
9012 if the value held by the attribute is not constant. */
9015 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
9017 if (attr->form == DW_FORM_sdata)
9018 return DW_SND (attr);
9019 else if (attr->form == DW_FORM_udata
9020 || attr->form == DW_FORM_data1
9021 || attr->form == DW_FORM_data2
9022 || attr->form == DW_FORM_data4
9023 || attr->form == DW_FORM_data8)
9024 return DW_UNSND (attr);
9027 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
9028 dwarf_form_name (attr->form));
9029 return default_value;
9033 static struct die_info *
9034 follow_die_ref (struct die_info *src_die, struct attribute *attr,
9035 struct dwarf2_cu *cu)
9037 struct die_info *die;
9038 unsigned int offset;
9040 struct die_info temp_die;
9041 struct dwarf2_cu *target_cu;
9043 offset = dwarf2_get_ref_die_offset (attr, cu);
9045 if (DW_ADDR (attr) < cu->header.offset
9046 || DW_ADDR (attr) >= cu->header.offset + cu->header.length)
9048 struct dwarf2_per_cu_data *per_cu;
9049 per_cu = dwarf2_find_containing_comp_unit (DW_ADDR (attr),
9051 target_cu = per_cu->cu;
9056 h = (offset % REF_HASH_SIZE);
9057 die = target_cu->die_ref_table[h];
9060 if (die->offset == offset)
9062 die = die->next_ref;
9065 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9066 "at 0x%lx [in module %s]"),
9067 (long) src_die->offset, (long) offset, cu->objfile->name);
9072 static struct type *
9073 dwarf2_fundamental_type (struct objfile *objfile, int typeid,
9074 struct dwarf2_cu *cu)
9076 if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
9078 error (_("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]"),
9079 typeid, objfile->name);
9082 /* Look for this particular type in the fundamental type vector. If
9083 one is not found, create and install one appropriate for the
9084 current language and the current target machine. */
9086 if (cu->ftypes[typeid] == NULL)
9088 cu->ftypes[typeid] = cu->language_defn->la_fund_type (objfile, typeid);
9091 return (cu->ftypes[typeid]);
9094 /* Decode simple location descriptions.
9095 Given a pointer to a dwarf block that defines a location, compute
9096 the location and return the value.
9098 NOTE drow/2003-11-18: This function is called in two situations
9099 now: for the address of static or global variables (partial symbols
9100 only) and for offsets into structures which are expected to be
9101 (more or less) constant. The partial symbol case should go away,
9102 and only the constant case should remain. That will let this
9103 function complain more accurately. A few special modes are allowed
9104 without complaint for global variables (for instance, global
9105 register values and thread-local values).
9107 A location description containing no operations indicates that the
9108 object is optimized out. The return value is 0 for that case.
9109 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9110 callers will only want a very basic result and this can become a
9113 Note that stack[0] is unused except as a default error return.
9114 Note that stack overflow is not yet handled. */
9117 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
9119 struct objfile *objfile = cu->objfile;
9120 struct comp_unit_head *cu_header = &cu->header;
9122 int size = blk->size;
9123 gdb_byte *data = blk->data;
9124 CORE_ADDR stack[64];
9126 unsigned int bytes_read, unsnd;
9170 stack[++stacki] = op - DW_OP_lit0;
9205 stack[++stacki] = op - DW_OP_reg0;
9207 dwarf2_complex_location_expr_complaint ();
9211 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
9213 stack[++stacki] = unsnd;
9215 dwarf2_complex_location_expr_complaint ();
9219 stack[++stacki] = read_address (objfile->obfd, &data[i],
9225 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
9230 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
9235 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
9240 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
9245 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
9250 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
9255 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
9261 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
9266 stack[stacki + 1] = stack[stacki];
9271 stack[stacki - 1] += stack[stacki];
9275 case DW_OP_plus_uconst:
9276 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
9281 stack[stacki - 1] -= stack[stacki];
9286 /* If we're not the last op, then we definitely can't encode
9287 this using GDB's address_class enum. This is valid for partial
9288 global symbols, although the variable's address will be bogus
9291 dwarf2_complex_location_expr_complaint ();
9294 case DW_OP_GNU_push_tls_address:
9295 /* The top of the stack has the offset from the beginning
9296 of the thread control block at which the variable is located. */
9297 /* Nothing should follow this operator, so the top of stack would
9299 /* This is valid for partial global symbols, but the variable's
9300 address will be bogus in the psymtab. */
9302 dwarf2_complex_location_expr_complaint ();
9305 case DW_OP_GNU_uninit:
9309 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
9310 dwarf_stack_op_name (op));
9311 return (stack[stacki]);
9314 return (stack[stacki]);
9317 /* memory allocation interface */
9319 static struct dwarf_block *
9320 dwarf_alloc_block (struct dwarf2_cu *cu)
9322 struct dwarf_block *blk;
9324 blk = (struct dwarf_block *)
9325 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
9329 static struct abbrev_info *
9330 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
9332 struct abbrev_info *abbrev;
9334 abbrev = (struct abbrev_info *)
9335 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
9336 memset (abbrev, 0, sizeof (struct abbrev_info));
9340 static struct die_info *
9341 dwarf_alloc_die (void)
9343 struct die_info *die;
9345 die = (struct die_info *) xmalloc (sizeof (struct die_info));
9346 memset (die, 0, sizeof (struct die_info));
9351 /* Macro support. */
9354 /* Return the full name of file number I in *LH's file name table.
9355 Use COMP_DIR as the name of the current directory of the
9356 compilation. The result is allocated using xmalloc; the caller is
9357 responsible for freeing it. */
9359 file_full_name (int file, struct line_header *lh, const char *comp_dir)
9361 /* Is the file number a valid index into the line header's file name
9362 table? Remember that file numbers start with one, not zero. */
9363 if (1 <= file && file <= lh->num_file_names)
9365 struct file_entry *fe = &lh->file_names[file - 1];
9367 if (IS_ABSOLUTE_PATH (fe->name))
9368 return xstrdup (fe->name);
9376 dir = lh->include_dirs[fe->dir_index - 1];
9382 dir_len = strlen (dir);
9383 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
9384 strcpy (full_name, dir);
9385 full_name[dir_len] = '/';
9386 strcpy (full_name + dir_len + 1, fe->name);
9390 return xstrdup (fe->name);
9395 /* The compiler produced a bogus file number. We can at least
9396 record the macro definitions made in the file, even if we
9397 won't be able to find the file by name. */
9399 sprintf (fake_name, "<bad macro file number %d>", file);
9401 complaint (&symfile_complaints,
9402 _("bad file number in macro information (%d)"),
9405 return xstrdup (fake_name);
9410 static struct macro_source_file *
9411 macro_start_file (int file, int line,
9412 struct macro_source_file *current_file,
9413 const char *comp_dir,
9414 struct line_header *lh, struct objfile *objfile)
9416 /* The full name of this source file. */
9417 char *full_name = file_full_name (file, lh, comp_dir);
9419 /* We don't create a macro table for this compilation unit
9420 at all until we actually get a filename. */
9421 if (! pending_macros)
9422 pending_macros = new_macro_table (&objfile->objfile_obstack,
9423 objfile->macro_cache);
9426 /* If we have no current file, then this must be the start_file
9427 directive for the compilation unit's main source file. */
9428 current_file = macro_set_main (pending_macros, full_name);
9430 current_file = macro_include (current_file, line, full_name);
9434 return current_file;
9438 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9439 followed by a null byte. */
9441 copy_string (const char *buf, int len)
9443 char *s = xmalloc (len + 1);
9444 memcpy (s, buf, len);
9452 consume_improper_spaces (const char *p, const char *body)
9456 complaint (&symfile_complaints,
9457 _("macro definition contains spaces in formal argument list:\n`%s'"),
9469 parse_macro_definition (struct macro_source_file *file, int line,
9474 /* The body string takes one of two forms. For object-like macro
9475 definitions, it should be:
9477 <macro name> " " <definition>
9479 For function-like macro definitions, it should be:
9481 <macro name> "() " <definition>
9483 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9485 Spaces may appear only where explicitly indicated, and in the
9488 The Dwarf 2 spec says that an object-like macro's name is always
9489 followed by a space, but versions of GCC around March 2002 omit
9490 the space when the macro's definition is the empty string.
9492 The Dwarf 2 spec says that there should be no spaces between the
9493 formal arguments in a function-like macro's formal argument list,
9494 but versions of GCC around March 2002 include spaces after the
9498 /* Find the extent of the macro name. The macro name is terminated
9499 by either a space or null character (for an object-like macro) or
9500 an opening paren (for a function-like macro). */
9501 for (p = body; *p; p++)
9502 if (*p == ' ' || *p == '(')
9505 if (*p == ' ' || *p == '\0')
9507 /* It's an object-like macro. */
9508 int name_len = p - body;
9509 char *name = copy_string (body, name_len);
9510 const char *replacement;
9513 replacement = body + name_len + 1;
9516 dwarf2_macro_malformed_definition_complaint (body);
9517 replacement = body + name_len;
9520 macro_define_object (file, line, name, replacement);
9526 /* It's a function-like macro. */
9527 char *name = copy_string (body, p - body);
9530 char **argv = xmalloc (argv_size * sizeof (*argv));
9534 p = consume_improper_spaces (p, body);
9536 /* Parse the formal argument list. */
9537 while (*p && *p != ')')
9539 /* Find the extent of the current argument name. */
9540 const char *arg_start = p;
9542 while (*p && *p != ',' && *p != ')' && *p != ' ')
9545 if (! *p || p == arg_start)
9546 dwarf2_macro_malformed_definition_complaint (body);
9549 /* Make sure argv has room for the new argument. */
9550 if (argc >= argv_size)
9553 argv = xrealloc (argv, argv_size * sizeof (*argv));
9556 argv[argc++] = copy_string (arg_start, p - arg_start);
9559 p = consume_improper_spaces (p, body);
9561 /* Consume the comma, if present. */
9566 p = consume_improper_spaces (p, body);
9575 /* Perfectly formed definition, no complaints. */
9576 macro_define_function (file, line, name,
9577 argc, (const char **) argv,
9579 else if (*p == '\0')
9581 /* Complain, but do define it. */
9582 dwarf2_macro_malformed_definition_complaint (body);
9583 macro_define_function (file, line, name,
9584 argc, (const char **) argv,
9588 /* Just complain. */
9589 dwarf2_macro_malformed_definition_complaint (body);
9592 /* Just complain. */
9593 dwarf2_macro_malformed_definition_complaint (body);
9599 for (i = 0; i < argc; i++)
9605 dwarf2_macro_malformed_definition_complaint (body);
9610 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
9611 char *comp_dir, bfd *abfd,
9612 struct dwarf2_cu *cu)
9614 gdb_byte *mac_ptr, *mac_end;
9615 struct macro_source_file *current_file = 0;
9617 if (dwarf2_per_objfile->macinfo_buffer == NULL)
9619 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
9623 mac_ptr = dwarf2_per_objfile->macinfo_buffer + offset;
9624 mac_end = dwarf2_per_objfile->macinfo_buffer
9625 + dwarf2_per_objfile->macinfo_size;
9629 enum dwarf_macinfo_record_type macinfo_type;
9631 /* Do we at least have room for a macinfo type byte? */
9632 if (mac_ptr >= mac_end)
9634 dwarf2_macros_too_long_complaint ();
9638 macinfo_type = read_1_byte (abfd, mac_ptr);
9641 switch (macinfo_type)
9643 /* A zero macinfo type indicates the end of the macro
9648 case DW_MACINFO_define:
9649 case DW_MACINFO_undef:
9651 unsigned int bytes_read;
9655 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9656 mac_ptr += bytes_read;
9657 body = read_string (abfd, mac_ptr, &bytes_read);
9658 mac_ptr += bytes_read;
9661 complaint (&symfile_complaints,
9662 _("debug info gives macro %s outside of any file: %s"),
9664 DW_MACINFO_define ? "definition" : macinfo_type ==
9665 DW_MACINFO_undef ? "undefinition" :
9666 "something-or-other", body);
9669 if (macinfo_type == DW_MACINFO_define)
9670 parse_macro_definition (current_file, line, body);
9671 else if (macinfo_type == DW_MACINFO_undef)
9672 macro_undef (current_file, line, body);
9677 case DW_MACINFO_start_file:
9679 unsigned int bytes_read;
9682 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9683 mac_ptr += bytes_read;
9684 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9685 mac_ptr += bytes_read;
9687 current_file = macro_start_file (file, line,
9688 current_file, comp_dir,
9693 case DW_MACINFO_end_file:
9695 complaint (&symfile_complaints,
9696 _("macro debug info has an unmatched `close_file' directive"));
9699 current_file = current_file->included_by;
9702 enum dwarf_macinfo_record_type next_type;
9704 /* GCC circa March 2002 doesn't produce the zero
9705 type byte marking the end of the compilation
9706 unit. Complain if it's not there, but exit no
9709 /* Do we at least have room for a macinfo type byte? */
9710 if (mac_ptr >= mac_end)
9712 dwarf2_macros_too_long_complaint ();
9716 /* We don't increment mac_ptr here, so this is just
9718 next_type = read_1_byte (abfd, mac_ptr);
9720 complaint (&symfile_complaints,
9721 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9728 case DW_MACINFO_vendor_ext:
9730 unsigned int bytes_read;
9734 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
9735 mac_ptr += bytes_read;
9736 string = read_string (abfd, mac_ptr, &bytes_read);
9737 mac_ptr += bytes_read;
9739 /* We don't recognize any vendor extensions. */
9746 /* Check if the attribute's form is a DW_FORM_block*
9747 if so return true else false. */
9749 attr_form_is_block (struct attribute *attr)
9751 return (attr == NULL ? 0 :
9752 attr->form == DW_FORM_block1
9753 || attr->form == DW_FORM_block2
9754 || attr->form == DW_FORM_block4
9755 || attr->form == DW_FORM_block);
9759 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
9760 struct dwarf2_cu *cu)
9762 struct objfile *objfile = cu->objfile;
9764 /* Save the master objfile, so that we can report and look up the
9765 correct file containing this variable. */
9766 if (objfile->separate_debug_objfile_backlink)
9767 objfile = objfile->separate_debug_objfile_backlink;
9769 if ((attr->form == DW_FORM_data4 || attr->form == DW_FORM_data8)
9770 /* ".debug_loc" may not exist at all, or the offset may be outside
9771 the section. If so, fall through to the complaint in the
9773 && DW_UNSND (attr) < dwarf2_per_objfile->loc_size)
9775 struct dwarf2_loclist_baton *baton;
9777 baton = obstack_alloc (&cu->objfile->objfile_obstack,
9778 sizeof (struct dwarf2_loclist_baton));
9779 baton->objfile = objfile;
9781 /* We don't know how long the location list is, but make sure we
9782 don't run off the edge of the section. */
9783 baton->size = dwarf2_per_objfile->loc_size - DW_UNSND (attr);
9784 baton->data = dwarf2_per_objfile->loc_buffer + DW_UNSND (attr);
9785 baton->base_address = cu->header.base_address;
9786 if (cu->header.base_known == 0)
9787 complaint (&symfile_complaints,
9788 _("Location list used without specifying the CU base address."));
9790 SYMBOL_OPS (sym) = &dwarf2_loclist_funcs;
9791 SYMBOL_LOCATION_BATON (sym) = baton;
9795 struct dwarf2_locexpr_baton *baton;
9797 baton = obstack_alloc (&cu->objfile->objfile_obstack,
9798 sizeof (struct dwarf2_locexpr_baton));
9799 baton->objfile = objfile;
9801 if (attr_form_is_block (attr))
9803 /* Note that we're just copying the block's data pointer
9804 here, not the actual data. We're still pointing into the
9805 info_buffer for SYM's objfile; right now we never release
9806 that buffer, but when we do clean up properly this may
9808 baton->size = DW_BLOCK (attr)->size;
9809 baton->data = DW_BLOCK (attr)->data;
9813 dwarf2_invalid_attrib_class_complaint ("location description",
9814 SYMBOL_NATURAL_NAME (sym));
9819 SYMBOL_OPS (sym) = &dwarf2_locexpr_funcs;
9820 SYMBOL_LOCATION_BATON (sym) = baton;
9824 /* Locate the compilation unit from CU's objfile which contains the
9825 DIE at OFFSET. Raises an error on failure. */
9827 static struct dwarf2_per_cu_data *
9828 dwarf2_find_containing_comp_unit (unsigned long offset,
9829 struct objfile *objfile)
9831 struct dwarf2_per_cu_data *this_cu;
9835 high = dwarf2_per_objfile->n_comp_units - 1;
9838 int mid = low + (high - low) / 2;
9839 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
9844 gdb_assert (low == high);
9845 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
9848 error (_("Dwarf Error: could not find partial DIE containing "
9849 "offset 0x%lx [in module %s]"),
9850 (long) offset, bfd_get_filename (objfile->obfd));
9852 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
9853 return dwarf2_per_objfile->all_comp_units[low-1];
9857 this_cu = dwarf2_per_objfile->all_comp_units[low];
9858 if (low == dwarf2_per_objfile->n_comp_units - 1
9859 && offset >= this_cu->offset + this_cu->length)
9860 error (_("invalid dwarf2 offset %ld"), offset);
9861 gdb_assert (offset < this_cu->offset + this_cu->length);
9866 /* Locate the compilation unit from OBJFILE which is located at exactly
9867 OFFSET. Raises an error on failure. */
9869 static struct dwarf2_per_cu_data *
9870 dwarf2_find_comp_unit (unsigned long offset, struct objfile *objfile)
9872 struct dwarf2_per_cu_data *this_cu;
9873 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
9874 if (this_cu->offset != offset)
9875 error (_("no compilation unit with offset %ld."), offset);
9879 /* Release one cached compilation unit, CU. We unlink it from the tree
9880 of compilation units, but we don't remove it from the read_in_chain;
9881 the caller is responsible for that. */
9884 free_one_comp_unit (void *data)
9886 struct dwarf2_cu *cu = data;
9888 if (cu->per_cu != NULL)
9889 cu->per_cu->cu = NULL;
9892 obstack_free (&cu->comp_unit_obstack, NULL);
9894 free_die_list (cu->dies);
9899 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9900 when we're finished with it. We can't free the pointer itself, but be
9901 sure to unlink it from the cache. Also release any associated storage
9902 and perform cache maintenance.
9904 Only used during partial symbol parsing. */
9907 free_stack_comp_unit (void *data)
9909 struct dwarf2_cu *cu = data;
9911 obstack_free (&cu->comp_unit_obstack, NULL);
9912 cu->partial_dies = NULL;
9914 if (cu->per_cu != NULL)
9916 /* This compilation unit is on the stack in our caller, so we
9917 should not xfree it. Just unlink it. */
9918 cu->per_cu->cu = NULL;
9921 /* If we had a per-cu pointer, then we may have other compilation
9922 units loaded, so age them now. */
9923 age_cached_comp_units ();
9927 /* Free all cached compilation units. */
9930 free_cached_comp_units (void *data)
9932 struct dwarf2_per_cu_data *per_cu, **last_chain;
9934 per_cu = dwarf2_per_objfile->read_in_chain;
9935 last_chain = &dwarf2_per_objfile->read_in_chain;
9936 while (per_cu != NULL)
9938 struct dwarf2_per_cu_data *next_cu;
9940 next_cu = per_cu->cu->read_in_chain;
9942 free_one_comp_unit (per_cu->cu);
9943 *last_chain = next_cu;
9949 /* Increase the age counter on each cached compilation unit, and free
9950 any that are too old. */
9953 age_cached_comp_units (void)
9955 struct dwarf2_per_cu_data *per_cu, **last_chain;
9957 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
9958 per_cu = dwarf2_per_objfile->read_in_chain;
9959 while (per_cu != NULL)
9961 per_cu->cu->last_used ++;
9962 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
9963 dwarf2_mark (per_cu->cu);
9964 per_cu = per_cu->cu->read_in_chain;
9967 per_cu = dwarf2_per_objfile->read_in_chain;
9968 last_chain = &dwarf2_per_objfile->read_in_chain;
9969 while (per_cu != NULL)
9971 struct dwarf2_per_cu_data *next_cu;
9973 next_cu = per_cu->cu->read_in_chain;
9975 if (!per_cu->cu->mark)
9977 free_one_comp_unit (per_cu->cu);
9978 *last_chain = next_cu;
9981 last_chain = &per_cu->cu->read_in_chain;
9987 /* Remove a single compilation unit from the cache. */
9990 free_one_cached_comp_unit (void *target_cu)
9992 struct dwarf2_per_cu_data *per_cu, **last_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 == target_cu)
10004 free_one_comp_unit (per_cu->cu);
10005 *last_chain = next_cu;
10009 last_chain = &per_cu->cu->read_in_chain;
10015 /* Release all extra memory associated with OBJFILE. */
10018 dwarf2_free_objfile (struct objfile *objfile)
10020 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
10022 if (dwarf2_per_objfile == NULL)
10025 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10026 free_cached_comp_units (NULL);
10028 /* Everything else should be on the objfile obstack. */
10031 /* A pair of DIE offset and GDB type pointer. We store these
10032 in a hash table separate from the DIEs, and preserve them
10033 when the DIEs are flushed out of cache. */
10035 struct dwarf2_offset_and_type
10037 unsigned int offset;
10041 /* Hash function for a dwarf2_offset_and_type. */
10044 offset_and_type_hash (const void *item)
10046 const struct dwarf2_offset_and_type *ofs = item;
10047 return ofs->offset;
10050 /* Equality function for a dwarf2_offset_and_type. */
10053 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
10055 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
10056 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
10057 return ofs_lhs->offset == ofs_rhs->offset;
10060 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10061 table if necessary. */
10064 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
10066 struct dwarf2_offset_and_type **slot, ofs;
10070 if (cu->per_cu == NULL)
10073 if (cu->per_cu->type_hash == NULL)
10074 cu->per_cu->type_hash
10075 = htab_create_alloc_ex (cu->header.length / 24,
10076 offset_and_type_hash,
10077 offset_and_type_eq,
10079 &cu->objfile->objfile_obstack,
10080 hashtab_obstack_allocate,
10081 dummy_obstack_deallocate);
10083 ofs.offset = die->offset;
10085 slot = (struct dwarf2_offset_and_type **)
10086 htab_find_slot_with_hash (cu->per_cu->type_hash, &ofs, ofs.offset, INSERT);
10087 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
10091 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10092 have a saved type. */
10094 static struct type *
10095 get_die_type (struct die_info *die, htab_t type_hash)
10097 struct dwarf2_offset_and_type *slot, ofs;
10099 ofs.offset = die->offset;
10100 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
10107 /* Restore the types of the DIE tree starting at START_DIE from the hash
10108 table saved in CU. */
10111 reset_die_and_siblings_types (struct die_info *start_die, struct dwarf2_cu *cu)
10113 struct die_info *die;
10115 if (cu->per_cu->type_hash == NULL)
10118 for (die = start_die; die != NULL; die = die->sibling)
10120 die->type = get_die_type (die, cu->per_cu->type_hash);
10121 if (die->child != NULL)
10122 reset_die_and_siblings_types (die->child, cu);
10126 /* Set the mark field in CU and in every other compilation unit in the
10127 cache that we must keep because we are keeping CU. */
10129 /* Add a dependence relationship from CU to REF_PER_CU. */
10132 dwarf2_add_dependence (struct dwarf2_cu *cu,
10133 struct dwarf2_per_cu_data *ref_per_cu)
10137 if (cu->dependencies == NULL)
10139 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
10140 NULL, &cu->comp_unit_obstack,
10141 hashtab_obstack_allocate,
10142 dummy_obstack_deallocate);
10144 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
10146 *slot = ref_per_cu;
10149 /* Set the mark field in CU and in every other compilation unit in the
10150 cache that we must keep because we are keeping CU. */
10153 dwarf2_mark_helper (void **slot, void *data)
10155 struct dwarf2_per_cu_data *per_cu;
10157 per_cu = (struct dwarf2_per_cu_data *) *slot;
10158 if (per_cu->cu->mark)
10160 per_cu->cu->mark = 1;
10162 if (per_cu->cu->dependencies != NULL)
10163 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
10169 dwarf2_mark (struct dwarf2_cu *cu)
10174 if (cu->dependencies != NULL)
10175 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
10179 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
10183 per_cu->cu->mark = 0;
10184 per_cu = per_cu->cu->read_in_chain;
10188 /* Trivial hash function for partial_die_info: the hash value of a DIE
10189 is its offset in .debug_info for this objfile. */
10192 partial_die_hash (const void *item)
10194 const struct partial_die_info *part_die = item;
10195 return part_die->offset;
10198 /* Trivial comparison function for partial_die_info structures: two DIEs
10199 are equal if they have the same offset. */
10202 partial_die_eq (const void *item_lhs, const void *item_rhs)
10204 const struct partial_die_info *part_die_lhs = item_lhs;
10205 const struct partial_die_info *part_die_rhs = item_rhs;
10206 return part_die_lhs->offset == part_die_rhs->offset;
10209 static struct cmd_list_element *set_dwarf2_cmdlist;
10210 static struct cmd_list_element *show_dwarf2_cmdlist;
10213 set_dwarf2_cmd (char *args, int from_tty)
10215 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
10219 show_dwarf2_cmd (char *args, int from_tty)
10221 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
10224 void _initialize_dwarf2_read (void);
10227 _initialize_dwarf2_read (void)
10229 dwarf2_objfile_data_key = register_objfile_data ();
10231 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
10232 Set DWARF 2 specific variables.\n\
10233 Configure DWARF 2 variables such as the cache size"),
10234 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
10235 0/*allow-unknown*/, &maintenance_set_cmdlist);
10237 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
10238 Show DWARF 2 specific variables\n\
10239 Show DWARF 2 variables such as the cache size"),
10240 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
10241 0/*allow-unknown*/, &maintenance_show_cmdlist);
10243 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
10244 &dwarf2_max_cache_age, _("\
10245 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10246 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10247 A higher limit means that cached compilation units will be stored\n\
10248 in memory longer, and more total memory will be used. Zero disables\n\
10249 caching, which can slow down startup."),
10251 show_dwarf2_max_cache_age,
10252 &set_dwarf2_cmdlist,
10253 &show_dwarf2_cmdlist);