1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
53 #include "gdb_string.h"
54 #include "gdb_assert.h"
55 #include <sys/types.h>
62 #define MAP_FAILED ((void *) -1)
67 /* .debug_info header for a compilation unit
68 Because of alignment constraints, this structure has padding and cannot
69 be mapped directly onto the beginning of the .debug_info section. */
70 typedef struct comp_unit_header
72 unsigned int length; /* length of the .debug_info
74 unsigned short version; /* version number -- 2 for DWARF
76 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
77 unsigned char addr_size; /* byte size of an address -- 4 */
80 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
83 /* .debug_pubnames header
84 Because of alignment constraints, this structure has padding and cannot
85 be mapped directly onto the beginning of the .debug_info section. */
86 typedef struct pubnames_header
88 unsigned int length; /* length of the .debug_pubnames
90 unsigned char version; /* version number -- 2 for DWARF
92 unsigned int info_offset; /* offset into .debug_info section */
93 unsigned int info_size; /* byte size of .debug_info section
97 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
99 /* .debug_pubnames header
100 Because of alignment constraints, this structure has padding and cannot
101 be mapped directly onto the beginning of the .debug_info section. */
102 typedef struct aranges_header
104 unsigned int length; /* byte len of the .debug_aranges
106 unsigned short version; /* version number -- 2 for DWARF
108 unsigned int info_offset; /* offset into .debug_info section */
109 unsigned char addr_size; /* byte size of an address */
110 unsigned char seg_size; /* byte size of segment descriptor */
113 #define _ACTUAL_ARANGES_HEADER_SIZE 12
115 /* .debug_line statement program prologue
116 Because of alignment constraints, this structure has padding and cannot
117 be mapped directly onto the beginning of the .debug_info section. */
118 typedef struct statement_prologue
120 unsigned int total_length; /* byte length of the statement
122 unsigned short version; /* version number -- 2 for DWARF
124 unsigned int prologue_length; /* # bytes between prologue &
126 unsigned char minimum_instruction_length; /* byte size of
128 unsigned char default_is_stmt; /* initial value of is_stmt
131 unsigned char line_range;
132 unsigned char opcode_base; /* number assigned to first special
134 unsigned char *standard_opcode_lengths;
138 /* When non-zero, dump DIEs after they are read in. */
139 static int dwarf2_die_debug = 0;
143 /* When set, the file that we're processing is known to have debugging
144 info for C++ namespaces. GCC 3.3.x did not produce this information,
145 but later versions do. */
147 static int processing_has_namespace_info;
149 static const struct objfile_data *dwarf2_objfile_data_key;
151 struct dwarf2_section_info
159 struct dwarf2_per_objfile
161 struct dwarf2_section_info info;
162 struct dwarf2_section_info abbrev;
163 struct dwarf2_section_info line;
164 struct dwarf2_section_info pubnames;
165 struct dwarf2_section_info aranges;
166 struct dwarf2_section_info loc;
167 struct dwarf2_section_info macinfo;
168 struct dwarf2_section_info str;
169 struct dwarf2_section_info ranges;
170 struct dwarf2_section_info types;
171 struct dwarf2_section_info frame;
172 struct dwarf2_section_info eh_frame;
174 /* A list of all the compilation units. This is used to locate
175 the target compilation unit of a particular reference. */
176 struct dwarf2_per_cu_data **all_comp_units;
178 /* The number of compilation units in ALL_COMP_UNITS. */
181 /* A chain of compilation units that are currently read in, so that
182 they can be freed later. */
183 struct dwarf2_per_cu_data *read_in_chain;
185 /* A table mapping .debug_types signatures to its signatured_type entry.
186 This is NULL if the .debug_types section hasn't been read in yet. */
187 htab_t signatured_types;
189 /* A flag indicating wether this objfile has a section loaded at a
191 int has_section_at_zero;
194 static struct dwarf2_per_objfile *dwarf2_per_objfile;
196 /* names of the debugging sections */
198 /* Note that if the debugging section has been compressed, it might
199 have a name like .zdebug_info. */
201 #define INFO_SECTION "debug_info"
202 #define ABBREV_SECTION "debug_abbrev"
203 #define LINE_SECTION "debug_line"
204 #define PUBNAMES_SECTION "debug_pubnames"
205 #define ARANGES_SECTION "debug_aranges"
206 #define LOC_SECTION "debug_loc"
207 #define MACINFO_SECTION "debug_macinfo"
208 #define STR_SECTION "debug_str"
209 #define RANGES_SECTION "debug_ranges"
210 #define TYPES_SECTION "debug_types"
211 #define FRAME_SECTION "debug_frame"
212 #define EH_FRAME_SECTION "eh_frame"
214 /* local data types */
216 /* We hold several abbreviation tables in memory at the same time. */
217 #ifndef ABBREV_HASH_SIZE
218 #define ABBREV_HASH_SIZE 121
221 /* The data in a compilation unit header, after target2host
222 translation, looks like this. */
223 struct comp_unit_head
227 unsigned char addr_size;
228 unsigned char signed_addr_p;
229 unsigned int abbrev_offset;
231 /* Size of file offsets; either 4 or 8. */
232 unsigned int offset_size;
234 /* Size of the length field; either 4 or 12. */
235 unsigned int initial_length_size;
237 /* Offset to the first byte of this compilation unit header in the
238 .debug_info section, for resolving relative reference dies. */
241 /* Offset to first die in this cu from the start of the cu.
242 This will be the first byte following the compilation unit header. */
243 unsigned int first_die_offset;
246 /* Internal state when decoding a particular compilation unit. */
249 /* The objfile containing this compilation unit. */
250 struct objfile *objfile;
252 /* The header of the compilation unit. */
253 struct comp_unit_head header;
255 /* Base address of this compilation unit. */
256 CORE_ADDR base_address;
258 /* Non-zero if base_address has been set. */
261 struct function_range *first_fn, *last_fn, *cached_fn;
263 /* The language we are debugging. */
264 enum language language;
265 const struct language_defn *language_defn;
267 const char *producer;
269 /* The generic symbol table building routines have separate lists for
270 file scope symbols and all all other scopes (local scopes). So
271 we need to select the right one to pass to add_symbol_to_list().
272 We do it by keeping a pointer to the correct list in list_in_scope.
274 FIXME: The original dwarf code just treated the file scope as the
275 first local scope, and all other local scopes as nested local
276 scopes, and worked fine. Check to see if we really need to
277 distinguish these in buildsym.c. */
278 struct pending **list_in_scope;
280 /* DWARF abbreviation table associated with this compilation unit. */
281 struct abbrev_info **dwarf2_abbrevs;
283 /* Storage for the abbrev table. */
284 struct obstack abbrev_obstack;
286 /* Hash table holding all the loaded partial DIEs. */
289 /* Storage for things with the same lifetime as this read-in compilation
290 unit, including partial DIEs. */
291 struct obstack comp_unit_obstack;
293 /* When multiple dwarf2_cu structures are living in memory, this field
294 chains them all together, so that they can be released efficiently.
295 We will probably also want a generation counter so that most-recently-used
296 compilation units are cached... */
297 struct dwarf2_per_cu_data *read_in_chain;
299 /* Backchain to our per_cu entry if the tree has been built. */
300 struct dwarf2_per_cu_data *per_cu;
302 /* Pointer to the die -> type map. Although it is stored
303 permanently in per_cu, we copy it here to avoid double
307 /* How many compilation units ago was this CU last referenced? */
310 /* A hash table of die offsets for following references. */
313 /* Full DIEs if read in. */
314 struct die_info *dies;
316 /* A set of pointers to dwarf2_per_cu_data objects for compilation
317 units referenced by this one. Only set during full symbol processing;
318 partial symbol tables do not have dependencies. */
321 /* Header data from the line table, during full symbol processing. */
322 struct line_header *line_header;
324 /* Mark used when releasing cached dies. */
325 unsigned int mark : 1;
327 /* This flag will be set if this compilation unit might include
328 inter-compilation-unit references. */
329 unsigned int has_form_ref_addr : 1;
331 /* This flag will be set if this compilation unit includes any
332 DW_TAG_namespace DIEs. If we know that there are explicit
333 DIEs for namespaces, we don't need to try to infer them
334 from mangled names. */
335 unsigned int has_namespace_info : 1;
338 /* Persistent data held for a compilation unit, even when not
339 processing it. We put a pointer to this structure in the
340 read_symtab_private field of the psymtab. If we encounter
341 inter-compilation-unit references, we also maintain a sorted
342 list of all compilation units. */
344 struct dwarf2_per_cu_data
346 /* The start offset and length of this compilation unit. 2**29-1
347 bytes should suffice to store the length of any compilation unit
348 - if it doesn't, GDB will fall over anyway.
349 NOTE: Unlike comp_unit_head.length, this length includes
350 initial_length_size. */
352 unsigned int length : 29;
354 /* Flag indicating this compilation unit will be read in before
355 any of the current compilation units are processed. */
356 unsigned int queued : 1;
358 /* This flag will be set if we need to load absolutely all DIEs
359 for this compilation unit, instead of just the ones we think
360 are interesting. It gets set if we look for a DIE in the
361 hash table and don't find it. */
362 unsigned int load_all_dies : 1;
364 /* Non-zero if this CU is from .debug_types.
365 Otherwise it's from .debug_info. */
366 unsigned int from_debug_types : 1;
368 /* Set iff currently read in. */
369 struct dwarf2_cu *cu;
371 /* If full symbols for this CU have been read in, then this field
372 holds a map of DIE offsets to types. It isn't always possible
373 to reconstruct this information later, so we have to preserve
377 /* The partial symbol table associated with this compilation unit,
378 or NULL for partial units (which do not have an associated
380 struct partial_symtab *psymtab;
383 /* Entry in the signatured_types hash table. */
385 struct signatured_type
389 /* Offset in .debug_types of the TU (type_unit) for this type. */
392 /* Offset in .debug_types of the type defined by this TU. */
393 unsigned int type_offset;
395 /* The CU(/TU) of this type. */
396 struct dwarf2_per_cu_data per_cu;
399 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
400 which are used for both .debug_info and .debug_types dies.
401 All parameters here are unchanging for the life of the call.
402 This struct exists to abstract away the constant parameters of
405 struct die_reader_specs
407 /* The bfd of this objfile. */
410 /* The CU of the DIE we are parsing. */
411 struct dwarf2_cu *cu;
413 /* Pointer to start of section buffer.
414 This is either the start of .debug_info or .debug_types. */
415 const gdb_byte *buffer;
418 /* The line number information for a compilation unit (found in the
419 .debug_line section) begins with a "statement program header",
420 which contains the following information. */
423 unsigned int total_length;
424 unsigned short version;
425 unsigned int header_length;
426 unsigned char minimum_instruction_length;
427 unsigned char default_is_stmt;
429 unsigned char line_range;
430 unsigned char opcode_base;
432 /* standard_opcode_lengths[i] is the number of operands for the
433 standard opcode whose value is i. This means that
434 standard_opcode_lengths[0] is unused, and the last meaningful
435 element is standard_opcode_lengths[opcode_base - 1]. */
436 unsigned char *standard_opcode_lengths;
438 /* The include_directories table. NOTE! These strings are not
439 allocated with xmalloc; instead, they are pointers into
440 debug_line_buffer. If you try to free them, `free' will get
442 unsigned int num_include_dirs, include_dirs_size;
445 /* The file_names table. NOTE! These strings are not allocated
446 with xmalloc; instead, they are pointers into debug_line_buffer.
447 Don't try to free them directly. */
448 unsigned int num_file_names, file_names_size;
452 unsigned int dir_index;
453 unsigned int mod_time;
455 int included_p; /* Non-zero if referenced by the Line Number Program. */
456 struct symtab *symtab; /* The associated symbol table, if any. */
459 /* The start and end of the statement program following this
460 header. These point into dwarf2_per_objfile->line_buffer. */
461 gdb_byte *statement_program_start, *statement_program_end;
464 /* When we construct a partial symbol table entry we only
465 need this much information. */
466 struct partial_die_info
468 /* Offset of this DIE. */
471 /* DWARF-2 tag for this DIE. */
472 ENUM_BITFIELD(dwarf_tag) tag : 16;
474 /* Assorted flags describing the data found in this DIE. */
475 unsigned int has_children : 1;
476 unsigned int is_external : 1;
477 unsigned int is_declaration : 1;
478 unsigned int has_type : 1;
479 unsigned int has_specification : 1;
480 unsigned int has_pc_info : 1;
482 /* Flag set if the SCOPE field of this structure has been
484 unsigned int scope_set : 1;
486 /* Flag set if the DIE has a byte_size attribute. */
487 unsigned int has_byte_size : 1;
489 /* The name of this DIE. Normally the value of DW_AT_name, but
490 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
494 /* The scope to prepend to our children. This is generally
495 allocated on the comp_unit_obstack, so will disappear
496 when this compilation unit leaves the cache. */
499 /* The location description associated with this DIE, if any. */
500 struct dwarf_block *locdesc;
502 /* If HAS_PC_INFO, the PC range associated with this DIE. */
506 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
507 DW_AT_sibling, if any. */
510 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
511 DW_AT_specification (or DW_AT_abstract_origin or
513 unsigned int spec_offset;
515 /* Pointers to this DIE's parent, first child, and next sibling,
517 struct partial_die_info *die_parent, *die_child, *die_sibling;
520 /* This data structure holds the information of an abbrev. */
523 unsigned int number; /* number identifying abbrev */
524 enum dwarf_tag tag; /* dwarf tag */
525 unsigned short has_children; /* boolean */
526 unsigned short num_attrs; /* number of attributes */
527 struct attr_abbrev *attrs; /* an array of attribute descriptions */
528 struct abbrev_info *next; /* next in chain */
533 ENUM_BITFIELD(dwarf_attribute) name : 16;
534 ENUM_BITFIELD(dwarf_form) form : 16;
537 /* Attributes have a name and a value */
540 ENUM_BITFIELD(dwarf_attribute) name : 16;
541 ENUM_BITFIELD(dwarf_form) form : 15;
543 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
544 field should be in u.str (existing only for DW_STRING) but it is kept
545 here for better struct attribute alignment. */
546 unsigned int string_is_canonical : 1;
551 struct dwarf_block *blk;
555 struct signatured_type *signatured_type;
560 /* This data structure holds a complete die structure. */
563 /* DWARF-2 tag for this DIE. */
564 ENUM_BITFIELD(dwarf_tag) tag : 16;
566 /* Number of attributes */
567 unsigned short num_attrs;
572 /* Offset in .debug_info or .debug_types section. */
575 /* The dies in a compilation unit form an n-ary tree. PARENT
576 points to this die's parent; CHILD points to the first child of
577 this node; and all the children of a given node are chained
578 together via their SIBLING fields, terminated by a die whose
580 struct die_info *child; /* Its first child, if any. */
581 struct die_info *sibling; /* Its next sibling, if any. */
582 struct die_info *parent; /* Its parent, if any. */
584 /* An array of attributes, with NUM_ATTRS elements. There may be
585 zero, but it's not common and zero-sized arrays are not
586 sufficiently portable C. */
587 struct attribute attrs[1];
590 struct function_range
593 CORE_ADDR lowpc, highpc;
595 struct function_range *next;
598 /* Get at parts of an attribute structure */
600 #define DW_STRING(attr) ((attr)->u.str)
601 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
602 #define DW_UNSND(attr) ((attr)->u.unsnd)
603 #define DW_BLOCK(attr) ((attr)->u.blk)
604 #define DW_SND(attr) ((attr)->u.snd)
605 #define DW_ADDR(attr) ((attr)->u.addr)
606 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
608 /* Blocks are a bunch of untyped bytes. */
615 #ifndef ATTR_ALLOC_CHUNK
616 #define ATTR_ALLOC_CHUNK 4
619 /* Allocate fields for structs, unions and enums in this size. */
620 #ifndef DW_FIELD_ALLOC_CHUNK
621 #define DW_FIELD_ALLOC_CHUNK 4
624 /* A zeroed version of a partial die for initialization purposes. */
625 static struct partial_die_info zeroed_partial_die;
627 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
628 but this would require a corresponding change in unpack_field_as_long
630 static int bits_per_byte = 8;
632 /* The routines that read and process dies for a C struct or C++ class
633 pass lists of data member fields and lists of member function fields
634 in an instance of a field_info structure, as defined below. */
637 /* List of data member and baseclasses fields. */
640 struct nextfield *next;
645 *fields, *baseclasses;
647 /* Number of fields (including baseclasses). */
650 /* Number of baseclasses. */
653 /* Set if the accesibility of one of the fields is not public. */
654 int non_public_fields;
656 /* Member function fields array, entries are allocated in the order they
657 are encountered in the object file. */
660 struct nextfnfield *next;
661 struct fn_field fnfield;
665 /* Member function fieldlist array, contains name of possibly overloaded
666 member function, number of overloaded member functions and a pointer
667 to the head of the member function field chain. */
672 struct nextfnfield *head;
676 /* Number of entries in the fnfieldlists array. */
680 /* One item on the queue of compilation units to read in full symbols
682 struct dwarf2_queue_item
684 struct dwarf2_per_cu_data *per_cu;
685 struct dwarf2_queue_item *next;
688 /* The current queue. */
689 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
691 /* Loaded secondary compilation units are kept in memory until they
692 have not been referenced for the processing of this many
693 compilation units. Set this to zero to disable caching. Cache
694 sizes of up to at least twenty will improve startup time for
695 typical inter-CU-reference binaries, at an obvious memory cost. */
696 static int dwarf2_max_cache_age = 5;
698 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
699 struct cmd_list_element *c, const char *value)
701 fprintf_filtered (file, _("\
702 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
707 /* Various complaints about symbol reading that don't abort the process */
710 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
712 complaint (&symfile_complaints,
713 _("statement list doesn't fit in .debug_line section"));
717 dwarf2_debug_line_missing_file_complaint (void)
719 complaint (&symfile_complaints,
720 _(".debug_line section has line data without a file"));
724 dwarf2_debug_line_missing_end_sequence_complaint (void)
726 complaint (&symfile_complaints,
727 _(".debug_line section has line program sequence without an end"));
731 dwarf2_complex_location_expr_complaint (void)
733 complaint (&symfile_complaints, _("location expression too complex"));
737 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
740 complaint (&symfile_complaints,
741 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
746 dwarf2_macros_too_long_complaint (void)
748 complaint (&symfile_complaints,
749 _("macro info runs off end of `.debug_macinfo' section"));
753 dwarf2_macro_malformed_definition_complaint (const char *arg1)
755 complaint (&symfile_complaints,
756 _("macro debug info contains a malformed macro definition:\n`%s'"),
761 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
763 complaint (&symfile_complaints,
764 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
767 /* local function prototypes */
769 static void dwarf2_locate_sections (bfd *, asection *, void *);
772 static void dwarf2_build_psymtabs_easy (struct objfile *);
775 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
778 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
780 struct partial_symtab *);
782 static void dwarf2_build_psymtabs_hard (struct objfile *);
784 static void scan_partial_symbols (struct partial_die_info *,
785 CORE_ADDR *, CORE_ADDR *,
786 int, struct dwarf2_cu *);
788 static void add_partial_symbol (struct partial_die_info *,
791 static int pdi_needs_namespace (enum dwarf_tag tag);
793 static void add_partial_namespace (struct partial_die_info *pdi,
794 CORE_ADDR *lowpc, CORE_ADDR *highpc,
795 int need_pc, struct dwarf2_cu *cu);
797 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
798 CORE_ADDR *highpc, int need_pc,
799 struct dwarf2_cu *cu);
801 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
802 struct dwarf2_cu *cu);
804 static void add_partial_subprogram (struct partial_die_info *pdi,
805 CORE_ADDR *lowpc, CORE_ADDR *highpc,
806 int need_pc, struct dwarf2_cu *cu);
808 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
809 gdb_byte *buffer, gdb_byte *info_ptr,
810 bfd *abfd, struct dwarf2_cu *cu);
812 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
814 static void psymtab_to_symtab_1 (struct partial_symtab *);
816 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
818 static void dwarf2_free_abbrev_table (void *);
820 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
823 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
826 static struct partial_die_info *load_partial_dies (bfd *,
827 gdb_byte *, gdb_byte *,
828 int, struct dwarf2_cu *);
830 static gdb_byte *read_partial_die (struct partial_die_info *,
831 struct abbrev_info *abbrev,
833 gdb_byte *, gdb_byte *,
836 static struct partial_die_info *find_partial_die (unsigned int,
839 static void fixup_partial_die (struct partial_die_info *,
842 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
843 bfd *, gdb_byte *, struct dwarf2_cu *);
845 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
846 bfd *, gdb_byte *, struct dwarf2_cu *);
848 static unsigned int read_1_byte (bfd *, gdb_byte *);
850 static int read_1_signed_byte (bfd *, gdb_byte *);
852 static unsigned int read_2_bytes (bfd *, gdb_byte *);
854 static unsigned int read_4_bytes (bfd *, gdb_byte *);
856 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
858 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
861 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
863 static LONGEST read_checked_initial_length_and_offset
864 (bfd *, gdb_byte *, const struct comp_unit_head *,
865 unsigned int *, unsigned int *);
867 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
870 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
872 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
874 static char *read_string (bfd *, gdb_byte *, unsigned int *);
876 static char *read_indirect_string (bfd *, gdb_byte *,
877 const struct comp_unit_head *,
880 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
882 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
884 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
886 static void set_cu_language (unsigned int, struct dwarf2_cu *);
888 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
891 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
895 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
896 struct dwarf2_cu *cu);
898 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
900 static struct die_info *die_specification (struct die_info *die,
901 struct dwarf2_cu **);
903 static void free_line_header (struct line_header *lh);
905 static void add_file_name (struct line_header *, char *, unsigned int,
906 unsigned int, unsigned int);
908 static struct line_header *(dwarf_decode_line_header
909 (unsigned int offset,
910 bfd *abfd, struct dwarf2_cu *cu));
912 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
913 struct dwarf2_cu *, struct partial_symtab *);
915 static void dwarf2_start_subfile (char *, char *, char *);
917 static struct symbol *new_symbol (struct die_info *, struct type *,
920 static void dwarf2_const_value (struct attribute *, struct symbol *,
923 static void dwarf2_const_value_data (struct attribute *attr,
927 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
929 static int need_gnat_info (struct dwarf2_cu *);
931 static struct type *die_descriptive_type (struct die_info *, struct dwarf2_cu *);
933 static void set_descriptive_type (struct type *, struct die_info *,
936 static struct type *die_containing_type (struct die_info *,
939 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
941 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
943 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
945 static char *typename_concat (struct obstack *,
950 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
952 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
954 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
956 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
958 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
959 struct dwarf2_cu *, struct partial_symtab *);
961 static int dwarf2_get_pc_bounds (struct die_info *,
962 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
963 struct partial_symtab *);
965 static void get_scope_pc_bounds (struct die_info *,
966 CORE_ADDR *, CORE_ADDR *,
969 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
970 CORE_ADDR, struct dwarf2_cu *);
972 static void dwarf2_add_field (struct field_info *, struct die_info *,
975 static void dwarf2_attach_fields_to_type (struct field_info *,
976 struct type *, struct dwarf2_cu *);
978 static void dwarf2_add_member_fn (struct field_info *,
979 struct die_info *, struct type *,
982 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
983 struct type *, struct dwarf2_cu *);
985 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
987 static const char *determine_class_name (struct die_info *die,
988 struct dwarf2_cu *cu);
990 static void read_common_block (struct die_info *, struct dwarf2_cu *);
992 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
994 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
996 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
998 static const char *namespace_name (struct die_info *die,
999 int *is_anonymous, struct dwarf2_cu *);
1001 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1003 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1005 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1006 struct dwarf2_cu *);
1008 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1010 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1012 gdb_byte **new_info_ptr,
1013 struct die_info *parent);
1015 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1017 gdb_byte **new_info_ptr,
1018 struct die_info *parent);
1020 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1022 gdb_byte **new_info_ptr,
1023 struct die_info *parent);
1025 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1026 struct die_info **, gdb_byte *,
1029 static void process_die (struct die_info *, struct dwarf2_cu *);
1031 static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
1033 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1036 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1038 static struct die_info *dwarf2_extension (struct die_info *die,
1039 struct dwarf2_cu **);
1041 static char *dwarf_tag_name (unsigned int);
1043 static char *dwarf_attr_name (unsigned int);
1045 static char *dwarf_form_name (unsigned int);
1047 static char *dwarf_stack_op_name (unsigned int);
1049 static char *dwarf_bool_name (unsigned int);
1051 static char *dwarf_type_encoding_name (unsigned int);
1054 static char *dwarf_cfi_name (unsigned int);
1057 static struct die_info *sibling_die (struct die_info *);
1059 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1061 static void dump_die_for_error (struct die_info *);
1063 static void dump_die_1 (struct ui_file *, int level, int max_level,
1066 /*static*/ void dump_die (struct die_info *, int max_level);
1068 static void store_in_ref_table (struct die_info *,
1069 struct dwarf2_cu *);
1071 static int is_ref_attr (struct attribute *);
1073 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1075 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1077 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1079 struct dwarf2_cu **);
1081 static struct die_info *follow_die_ref (struct die_info *,
1083 struct dwarf2_cu **);
1085 static struct die_info *follow_die_sig (struct die_info *,
1087 struct dwarf2_cu **);
1089 static void read_signatured_type_at_offset (struct objfile *objfile,
1090 unsigned int offset);
1092 static void read_signatured_type (struct objfile *,
1093 struct signatured_type *type_sig);
1095 /* memory allocation interface */
1097 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1099 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1101 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1103 static void initialize_cu_func_list (struct dwarf2_cu *);
1105 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1106 struct dwarf2_cu *);
1108 static void dwarf_decode_macros (struct line_header *, unsigned int,
1109 char *, bfd *, struct dwarf2_cu *);
1111 static int attr_form_is_block (struct attribute *);
1113 static int attr_form_is_section_offset (struct attribute *);
1115 static int attr_form_is_constant (struct attribute *);
1117 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1119 struct dwarf2_cu *cu);
1121 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1122 struct abbrev_info *abbrev,
1123 struct dwarf2_cu *cu);
1125 static void free_stack_comp_unit (void *);
1127 static hashval_t partial_die_hash (const void *item);
1129 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1131 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1132 (unsigned int offset, struct objfile *objfile);
1134 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1135 (unsigned int offset, struct objfile *objfile);
1137 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1139 static void free_one_comp_unit (void *);
1141 static void free_cached_comp_units (void *);
1143 static void age_cached_comp_units (void);
1145 static void free_one_cached_comp_unit (void *);
1147 static struct type *set_die_type (struct die_info *, struct type *,
1148 struct dwarf2_cu *);
1150 static void create_all_comp_units (struct objfile *);
1152 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1155 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1157 static void dwarf2_add_dependence (struct dwarf2_cu *,
1158 struct dwarf2_per_cu_data *);
1160 static void dwarf2_mark (struct dwarf2_cu *);
1162 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1164 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1166 /* Try to locate the sections we need for DWARF 2 debugging
1167 information and return true if we have enough to do something. */
1170 dwarf2_has_info (struct objfile *objfile)
1172 struct dwarf2_per_objfile *data;
1174 /* Initialize per-objfile state. */
1175 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1176 memset (data, 0, sizeof (*data));
1177 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1178 dwarf2_per_objfile = data;
1180 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1181 return (data->info.asection != NULL && data->abbrev.asection != NULL);
1184 /* When loading sections, we can either look for ".<name>", or for
1185 * ".z<name>", which indicates a compressed section. */
1188 section_is_p (const char *section_name, const char *name)
1190 return (section_name[0] == '.'
1191 && (strcmp (section_name + 1, name) == 0
1192 || (section_name[1] == 'z'
1193 && strcmp (section_name + 2, name) == 0)));
1196 /* This function is mapped across the sections and remembers the
1197 offset and size of each of the debugging sections we are interested
1201 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1203 if (section_is_p (sectp->name, INFO_SECTION))
1205 dwarf2_per_objfile->info.asection = sectp;
1206 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1208 else if (section_is_p (sectp->name, ABBREV_SECTION))
1210 dwarf2_per_objfile->abbrev.asection = sectp;
1211 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1213 else if (section_is_p (sectp->name, LINE_SECTION))
1215 dwarf2_per_objfile->line.asection = sectp;
1216 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1218 else if (section_is_p (sectp->name, PUBNAMES_SECTION))
1220 dwarf2_per_objfile->pubnames.asection = sectp;
1221 dwarf2_per_objfile->pubnames.size = bfd_get_section_size (sectp);
1223 else if (section_is_p (sectp->name, ARANGES_SECTION))
1225 dwarf2_per_objfile->aranges.asection = sectp;
1226 dwarf2_per_objfile->aranges.size = bfd_get_section_size (sectp);
1228 else if (section_is_p (sectp->name, LOC_SECTION))
1230 dwarf2_per_objfile->loc.asection = sectp;
1231 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1233 else if (section_is_p (sectp->name, MACINFO_SECTION))
1235 dwarf2_per_objfile->macinfo.asection = sectp;
1236 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1238 else if (section_is_p (sectp->name, STR_SECTION))
1240 dwarf2_per_objfile->str.asection = sectp;
1241 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1243 else if (section_is_p (sectp->name, FRAME_SECTION))
1245 dwarf2_per_objfile->frame.asection = sectp;
1246 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1248 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1250 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1251 if (aflag & SEC_HAS_CONTENTS)
1253 dwarf2_per_objfile->eh_frame.asection = sectp;
1254 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1257 else if (section_is_p (sectp->name, RANGES_SECTION))
1259 dwarf2_per_objfile->ranges.asection = sectp;
1260 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1262 else if (section_is_p (sectp->name, TYPES_SECTION))
1264 dwarf2_per_objfile->types.asection = sectp;
1265 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1268 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1269 && bfd_section_vma (abfd, sectp) == 0)
1270 dwarf2_per_objfile->has_section_at_zero = 1;
1273 /* Decompress a section that was compressed using zlib. Store the
1274 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1277 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1278 gdb_byte **outbuf, bfd_size_type *outsize)
1280 bfd *abfd = objfile->obfd;
1282 error (_("Support for zlib-compressed DWARF data (from '%s') "
1283 "is disabled in this copy of GDB"),
1284 bfd_get_filename (abfd));
1286 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1287 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1288 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1289 bfd_size_type uncompressed_size;
1290 gdb_byte *uncompressed_buffer;
1293 int header_size = 12;
1295 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1296 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1297 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1298 bfd_get_filename (abfd));
1300 /* Read the zlib header. In this case, it should be "ZLIB" followed
1301 by the uncompressed section size, 8 bytes in big-endian order. */
1302 if (compressed_size < header_size
1303 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1304 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1305 bfd_get_filename (abfd));
1306 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1307 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1308 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1309 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1310 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1311 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1312 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1313 uncompressed_size += compressed_buffer[11];
1315 /* It is possible the section consists of several compressed
1316 buffers concatenated together, so we uncompress in a loop. */
1320 strm.avail_in = compressed_size - header_size;
1321 strm.next_in = (Bytef*) compressed_buffer + header_size;
1322 strm.avail_out = uncompressed_size;
1323 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1325 rc = inflateInit (&strm);
1326 while (strm.avail_in > 0)
1329 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1330 bfd_get_filename (abfd), rc);
1331 strm.next_out = ((Bytef*) uncompressed_buffer
1332 + (uncompressed_size - strm.avail_out));
1333 rc = inflate (&strm, Z_FINISH);
1334 if (rc != Z_STREAM_END)
1335 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1336 bfd_get_filename (abfd), rc);
1337 rc = inflateReset (&strm);
1339 rc = inflateEnd (&strm);
1341 || strm.avail_out != 0)
1342 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1343 bfd_get_filename (abfd), rc);
1345 do_cleanups (cleanup);
1346 *outbuf = uncompressed_buffer;
1347 *outsize = uncompressed_size;
1351 /* Read the contents of the section SECTP from object file specified by
1352 OBJFILE, store info about the section into INFO.
1353 If the section is compressed, uncompress it before returning. */
1356 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1358 bfd *abfd = objfile->obfd;
1359 asection *sectp = info->asection;
1360 gdb_byte *buf, *retbuf;
1361 unsigned char header[4];
1363 info->buffer = NULL;
1364 info->was_mmapped = 0;
1366 if (info->asection == NULL || info->size == 0)
1369 /* Check if the file has a 4-byte header indicating compression. */
1370 if (info->size > sizeof (header)
1371 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1372 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1374 /* Upon decompression, update the buffer and its size. */
1375 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1377 zlib_decompress_section (objfile, sectp, &info->buffer,
1385 pagesize = getpagesize ();
1387 /* Only try to mmap sections which are large enough: we don't want to
1388 waste space due to fragmentation. Also, only try mmap for sections
1389 without relocations. */
1391 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1393 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1394 size_t map_length = info->size + sectp->filepos - pg_offset;
1395 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1396 MAP_PRIVATE, pg_offset);
1398 if (retbuf != MAP_FAILED)
1400 info->was_mmapped = 1;
1401 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1407 /* If we get here, we are a normal, not-compressed section. */
1409 = obstack_alloc (&objfile->objfile_obstack, info->size);
1411 /* When debugging .o files, we may need to apply relocations; see
1412 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1413 We never compress sections in .o files, so we only need to
1414 try this when the section is not compressed. */
1415 retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
1418 info->buffer = retbuf;
1422 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1423 || bfd_bread (buf, info->size, abfd) != info->size)
1424 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1425 bfd_get_filename (abfd));
1428 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1432 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1433 asection **sectp, gdb_byte **bufp,
1434 bfd_size_type *sizep)
1436 struct dwarf2_per_objfile *data
1437 = objfile_data (objfile, dwarf2_objfile_data_key);
1438 struct dwarf2_section_info *info;
1439 if (section_is_p (section_name, EH_FRAME_SECTION))
1440 info = &data->eh_frame;
1441 else if (section_is_p (section_name, FRAME_SECTION))
1442 info = &data->frame;
1446 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1447 /* We haven't read this section in yet. Do it now. */
1448 dwarf2_read_section (objfile, info);
1450 *sectp = info->asection;
1451 *bufp = info->buffer;
1452 *sizep = info->size;
1455 /* Build a partial symbol table. */
1458 dwarf2_build_psymtabs (struct objfile *objfile)
1460 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
1461 dwarf2_read_section (objfile, &dwarf2_per_objfile->abbrev);
1462 dwarf2_read_section (objfile, &dwarf2_per_objfile->line);
1463 dwarf2_read_section (objfile, &dwarf2_per_objfile->str);
1464 dwarf2_read_section (objfile, &dwarf2_per_objfile->macinfo);
1465 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
1466 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
1467 dwarf2_read_section (objfile, &dwarf2_per_objfile->loc);
1468 dwarf2_read_section (objfile, &dwarf2_per_objfile->eh_frame);
1469 dwarf2_read_section (objfile, &dwarf2_per_objfile->frame);
1471 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
1473 init_psymbol_list (objfile, 1024);
1477 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1479 /* Things are significantly easier if we have .debug_aranges and
1480 .debug_pubnames sections */
1482 dwarf2_build_psymtabs_easy (objfile);
1486 /* only test this case for now */
1488 /* In this case we have to work a bit harder */
1489 dwarf2_build_psymtabs_hard (objfile);
1494 /* Build the partial symbol table from the information in the
1495 .debug_pubnames and .debug_aranges sections. */
1498 dwarf2_build_psymtabs_easy (struct objfile *objfile)
1500 bfd *abfd = objfile->obfd;
1501 char *aranges_buffer, *pubnames_buffer;
1502 char *aranges_ptr, *pubnames_ptr;
1503 unsigned int entry_length, version, info_offset, info_size;
1505 pubnames_buffer = dwarf2_read_section (objfile,
1506 dwarf_pubnames_section);
1507 pubnames_ptr = pubnames_buffer;
1508 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames.size)
1510 unsigned int bytes_read;
1512 entry_length = read_initial_length (abfd, pubnames_ptr, &bytes_read);
1513 pubnames_ptr += bytes_read;
1514 version = read_1_byte (abfd, pubnames_ptr);
1516 info_offset = read_4_bytes (abfd, pubnames_ptr);
1518 info_size = read_4_bytes (abfd, pubnames_ptr);
1522 aranges_buffer = dwarf2_read_section (objfile,
1523 dwarf_aranges_section);
1528 /* Return TRUE if OFFSET is within CU_HEADER. */
1531 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
1533 unsigned int bottom = cu_header->offset;
1534 unsigned int top = (cu_header->offset
1536 + cu_header->initial_length_size);
1537 return (offset >= bottom && offset < top);
1540 /* Read in the comp unit header information from the debug_info at info_ptr.
1541 NOTE: This leaves members offset, first_die_offset to be filled in
1545 read_comp_unit_head (struct comp_unit_head *cu_header,
1546 gdb_byte *info_ptr, bfd *abfd)
1549 unsigned int bytes_read;
1551 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
1552 cu_header->initial_length_size = bytes_read;
1553 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
1554 info_ptr += bytes_read;
1555 cu_header->version = read_2_bytes (abfd, info_ptr);
1557 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1559 info_ptr += bytes_read;
1560 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1562 signed_addr = bfd_get_sign_extend_vma (abfd);
1563 if (signed_addr < 0)
1564 internal_error (__FILE__, __LINE__,
1565 _("read_comp_unit_head: dwarf from non elf file"));
1566 cu_header->signed_addr_p = signed_addr;
1572 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1573 gdb_byte *buffer, unsigned int buffer_size,
1576 gdb_byte *beg_of_comp_unit = info_ptr;
1578 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1580 if (header->version != 2 && header->version != 3)
1581 error (_("Dwarf Error: wrong version in compilation unit header "
1582 "(is %d, should be %d) [in module %s]"), header->version,
1583 2, bfd_get_filename (abfd));
1585 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
1586 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1587 "(offset 0x%lx + 6) [in module %s]"),
1588 (long) header->abbrev_offset,
1589 (long) (beg_of_comp_unit - buffer),
1590 bfd_get_filename (abfd));
1592 if (beg_of_comp_unit + header->length + header->initial_length_size
1593 > buffer + buffer_size)
1594 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1595 "(offset 0x%lx + 0) [in module %s]"),
1596 (long) header->length,
1597 (long) (beg_of_comp_unit - buffer),
1598 bfd_get_filename (abfd));
1603 /* Read in the types comp unit header information from .debug_types entry at
1604 types_ptr. The result is a pointer to one past the end of the header. */
1607 read_type_comp_unit_head (struct comp_unit_head *cu_header,
1608 ULONGEST *signature,
1609 gdb_byte *types_ptr, bfd *abfd)
1611 unsigned int bytes_read;
1612 gdb_byte *initial_types_ptr = types_ptr;
1614 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
1616 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
1618 *signature = read_8_bytes (abfd, types_ptr);
1620 types_ptr += cu_header->offset_size;
1621 cu_header->first_die_offset = types_ptr - initial_types_ptr;
1626 /* Allocate a new partial symtab for file named NAME and mark this new
1627 partial symtab as being an include of PST. */
1630 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1631 struct objfile *objfile)
1633 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1635 subpst->section_offsets = pst->section_offsets;
1636 subpst->textlow = 0;
1637 subpst->texthigh = 0;
1639 subpst->dependencies = (struct partial_symtab **)
1640 obstack_alloc (&objfile->objfile_obstack,
1641 sizeof (struct partial_symtab *));
1642 subpst->dependencies[0] = pst;
1643 subpst->number_of_dependencies = 1;
1645 subpst->globals_offset = 0;
1646 subpst->n_global_syms = 0;
1647 subpst->statics_offset = 0;
1648 subpst->n_static_syms = 0;
1649 subpst->symtab = NULL;
1650 subpst->read_symtab = pst->read_symtab;
1653 /* No private part is necessary for include psymtabs. This property
1654 can be used to differentiate between such include psymtabs and
1655 the regular ones. */
1656 subpst->read_symtab_private = NULL;
1659 /* Read the Line Number Program data and extract the list of files
1660 included by the source file represented by PST. Build an include
1661 partial symtab for each of these included files. */
1664 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1665 struct die_info *die,
1666 struct partial_symtab *pst)
1668 struct objfile *objfile = cu->objfile;
1669 bfd *abfd = objfile->obfd;
1670 struct line_header *lh = NULL;
1671 struct attribute *attr;
1673 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
1676 unsigned int line_offset = DW_UNSND (attr);
1677 lh = dwarf_decode_line_header (line_offset, abfd, cu);
1680 return; /* No linetable, so no includes. */
1682 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1684 free_line_header (lh);
1688 hash_type_signature (const void *item)
1690 const struct signatured_type *type_sig = item;
1691 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1692 return type_sig->signature;
1696 eq_type_signature (const void *item_lhs, const void *item_rhs)
1698 const struct signatured_type *lhs = item_lhs;
1699 const struct signatured_type *rhs = item_rhs;
1700 return lhs->signature == rhs->signature;
1703 /* Create the hash table of all entries in the .debug_types section.
1704 The result is zero if there is an error (e.g. missing .debug_types section),
1705 otherwise non-zero. */
1708 create_debug_types_hash_table (struct objfile *objfile)
1710 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer;
1713 if (info_ptr == NULL)
1715 dwarf2_per_objfile->signatured_types = NULL;
1719 types_htab = htab_create_alloc_ex (41,
1720 hash_type_signature,
1723 &objfile->objfile_obstack,
1724 hashtab_obstack_allocate,
1725 dummy_obstack_deallocate);
1727 if (dwarf2_die_debug)
1728 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
1730 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1732 unsigned int offset;
1733 unsigned int offset_size;
1734 unsigned int type_offset;
1735 unsigned int length, initial_length_size;
1736 unsigned short version;
1738 struct signatured_type *type_sig;
1740 gdb_byte *ptr = info_ptr;
1742 offset = ptr - dwarf2_per_objfile->types.buffer;
1744 /* We need to read the type's signature in order to build the hash
1745 table, but we don't need to read anything else just yet. */
1747 /* Sanity check to ensure entire cu is present. */
1748 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
1749 if (ptr + length + initial_length_size
1750 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1752 complaint (&symfile_complaints,
1753 _("debug type entry runs off end of `.debug_types' section, ignored"));
1757 offset_size = initial_length_size == 4 ? 4 : 8;
1758 ptr += initial_length_size;
1759 version = bfd_get_16 (objfile->obfd, ptr);
1761 ptr += offset_size; /* abbrev offset */
1762 ptr += 1; /* address size */
1763 signature = bfd_get_64 (objfile->obfd, ptr);
1765 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
1767 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
1768 memset (type_sig, 0, sizeof (*type_sig));
1769 type_sig->signature = signature;
1770 type_sig->offset = offset;
1771 type_sig->type_offset = type_offset;
1773 slot = htab_find_slot (types_htab, type_sig, INSERT);
1774 gdb_assert (slot != NULL);
1777 if (dwarf2_die_debug)
1778 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
1779 offset, phex (signature, sizeof (signature)));
1781 info_ptr = info_ptr + initial_length_size + length;
1784 dwarf2_per_objfile->signatured_types = types_htab;
1789 /* Lookup a signature based type.
1790 Returns NULL if SIG is not present in the table. */
1792 static struct signatured_type *
1793 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
1795 struct signatured_type find_entry, *entry;
1797 if (dwarf2_per_objfile->signatured_types == NULL)
1799 complaint (&symfile_complaints,
1800 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1804 find_entry.signature = sig;
1805 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
1809 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1812 init_cu_die_reader (struct die_reader_specs *reader,
1813 struct dwarf2_cu *cu)
1815 reader->abfd = cu->objfile->obfd;
1817 if (cu->per_cu->from_debug_types)
1818 reader->buffer = dwarf2_per_objfile->types.buffer;
1820 reader->buffer = dwarf2_per_objfile->info.buffer;
1823 /* Find the base address of the compilation unit for range lists and
1824 location lists. It will normally be specified by DW_AT_low_pc.
1825 In DWARF-3 draft 4, the base address could be overridden by
1826 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1827 compilation units with discontinuous ranges. */
1830 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
1832 struct attribute *attr;
1835 cu->base_address = 0;
1837 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
1840 cu->base_address = DW_ADDR (attr);
1845 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
1848 cu->base_address = DW_ADDR (attr);
1854 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1855 to combine the common parts.
1856 Process a compilation unit for a psymtab.
1857 BUFFER is a pointer to the beginning of the dwarf section buffer,
1858 either .debug_info or debug_types.
1859 INFO_PTR is a pointer to the start of the CU.
1860 Returns a pointer to the next CU. */
1863 process_psymtab_comp_unit (struct objfile *objfile,
1864 struct dwarf2_per_cu_data *this_cu,
1865 gdb_byte *buffer, gdb_byte *info_ptr,
1866 unsigned int buffer_size)
1868 bfd *abfd = objfile->obfd;
1869 gdb_byte *beg_of_comp_unit = info_ptr;
1870 struct die_info *comp_unit_die;
1871 struct partial_symtab *pst;
1873 struct cleanup *back_to_inner;
1874 struct dwarf2_cu cu;
1875 unsigned int bytes_read;
1876 int has_children, has_pc_info;
1877 struct attribute *attr;
1879 CORE_ADDR best_lowpc = 0, best_highpc = 0;
1880 struct die_reader_specs reader_specs;
1882 memset (&cu, 0, sizeof (cu));
1883 cu.objfile = objfile;
1884 obstack_init (&cu.comp_unit_obstack);
1886 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1888 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
1889 buffer, buffer_size,
1892 /* Complete the cu_header. */
1893 cu.header.offset = beg_of_comp_unit - buffer;
1894 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
1896 cu.list_in_scope = &file_symbols;
1898 /* If this compilation unit was already read in, free the
1899 cached copy in order to read it in again. This is
1900 necessary because we skipped some symbols when we first
1901 read in the compilation unit (see load_partial_dies).
1902 This problem could be avoided, but the benefit is
1904 if (this_cu->cu != NULL)
1905 free_one_cached_comp_unit (this_cu->cu);
1907 /* Note that this is a pointer to our stack frame, being
1908 added to a global data structure. It will be cleaned up
1909 in free_stack_comp_unit when we finish with this
1910 compilation unit. */
1912 cu.per_cu = this_cu;
1914 /* Read the abbrevs for this compilation unit into a table. */
1915 dwarf2_read_abbrevs (abfd, &cu);
1916 make_cleanup (dwarf2_free_abbrev_table, &cu);
1918 /* Read the compilation unit die. */
1919 if (this_cu->from_debug_types)
1920 info_ptr += 8 /*signature*/ + cu.header.offset_size;
1921 init_cu_die_reader (&reader_specs, &cu);
1922 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
1925 if (this_cu->from_debug_types)
1927 /* offset,length haven't been set yet for type units. */
1928 this_cu->offset = cu.header.offset;
1929 this_cu->length = cu.header.length + cu.header.initial_length_size;
1931 else if (comp_unit_die->tag == DW_TAG_partial_unit)
1933 info_ptr = (beg_of_comp_unit + cu.header.length
1934 + cu.header.initial_length_size);
1935 do_cleanups (back_to_inner);
1939 /* Set the language we're debugging. */
1940 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
1942 set_cu_language (DW_UNSND (attr), &cu);
1944 set_cu_language (language_minimal, &cu);
1946 /* Allocate a new partial symbol table structure. */
1947 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
1948 pst = start_psymtab_common (objfile, objfile->section_offsets,
1949 (attr != NULL) ? DW_STRING (attr) : "",
1950 /* TEXTLOW and TEXTHIGH are set below. */
1952 objfile->global_psymbols.next,
1953 objfile->static_psymbols.next);
1955 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
1957 pst->dirname = DW_STRING (attr);
1959 pst->read_symtab_private = (char *) this_cu;
1961 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1963 /* Store the function that reads in the rest of the symbol table */
1964 pst->read_symtab = dwarf2_psymtab_to_symtab;
1966 this_cu->psymtab = pst;
1968 dwarf2_find_base_address (comp_unit_die, &cu);
1970 /* Possibly set the default values of LOWPC and HIGHPC from
1972 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
1973 &best_highpc, &cu, pst);
1974 if (has_pc_info == 1 && best_lowpc < best_highpc)
1975 /* Store the contiguous range if it is not empty; it can be empty for
1976 CUs with no code. */
1977 addrmap_set_empty (objfile->psymtabs_addrmap,
1978 best_lowpc + baseaddr,
1979 best_highpc + baseaddr - 1, pst);
1981 /* Check if comp unit has_children.
1982 If so, read the rest of the partial symbols from this comp unit.
1983 If not, there's no more debug_info for this comp unit. */
1986 struct partial_die_info *first_die;
1987 CORE_ADDR lowpc, highpc;
1989 lowpc = ((CORE_ADDR) -1);
1990 highpc = ((CORE_ADDR) 0);
1992 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
1994 scan_partial_symbols (first_die, &lowpc, &highpc,
1995 ! has_pc_info, &cu);
1997 /* If we didn't find a lowpc, set it to highpc to avoid
1998 complaints from `maint check'. */
1999 if (lowpc == ((CORE_ADDR) -1))
2002 /* If the compilation unit didn't have an explicit address range,
2003 then use the information extracted from its child dies. */
2007 best_highpc = highpc;
2010 pst->textlow = best_lowpc + baseaddr;
2011 pst->texthigh = best_highpc + baseaddr;
2013 pst->n_global_syms = objfile->global_psymbols.next -
2014 (objfile->global_psymbols.list + pst->globals_offset);
2015 pst->n_static_syms = objfile->static_psymbols.next -
2016 (objfile->static_psymbols.list + pst->statics_offset);
2017 sort_pst_symbols (pst);
2019 /* If there is already a psymtab or symtab for a file of this
2020 name, remove it. (If there is a symtab, more drastic things
2021 also happen.) This happens in VxWorks. */
2022 if (! this_cu->from_debug_types)
2023 free_named_symtabs (pst->filename);
2025 info_ptr = (beg_of_comp_unit + cu.header.length
2026 + cu.header.initial_length_size);
2028 if (this_cu->from_debug_types)
2030 /* It's not clear we want to do anything with stmt lists here.
2031 Waiting to see what gcc ultimately does. */
2035 /* Get the list of files included in the current compilation unit,
2036 and build a psymtab for each of them. */
2037 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
2040 do_cleanups (back_to_inner);
2045 /* Traversal function for htab_traverse_noresize.
2046 Process one .debug_types comp-unit. */
2049 process_type_comp_unit (void **slot, void *info)
2051 struct signatured_type *entry = (struct signatured_type *) *slot;
2052 struct objfile *objfile = (struct objfile *) info;
2053 struct dwarf2_per_cu_data *this_cu;
2055 this_cu = &entry->per_cu;
2056 this_cu->from_debug_types = 1;
2058 process_psymtab_comp_unit (objfile, this_cu,
2059 dwarf2_per_objfile->types.buffer,
2060 dwarf2_per_objfile->types.buffer + entry->offset,
2061 dwarf2_per_objfile->types.size);
2066 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2067 Build partial symbol tables for the .debug_types comp-units. */
2070 build_type_psymtabs (struct objfile *objfile)
2072 if (! create_debug_types_hash_table (objfile))
2075 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
2076 process_type_comp_unit, objfile);
2079 /* Build the partial symbol table by doing a quick pass through the
2080 .debug_info and .debug_abbrev sections. */
2083 dwarf2_build_psymtabs_hard (struct objfile *objfile)
2085 /* Instead of reading this into a big buffer, we should probably use
2086 mmap() on architectures that support it. (FIXME) */
2087 bfd *abfd = objfile->obfd;
2089 struct cleanup *back_to;
2091 info_ptr = dwarf2_per_objfile->info.buffer;
2093 /* Any cached compilation units will be linked by the per-objfile
2094 read_in_chain. Make sure to free them when we're done. */
2095 back_to = make_cleanup (free_cached_comp_units, NULL);
2097 build_type_psymtabs (objfile);
2099 create_all_comp_units (objfile);
2101 objfile->psymtabs_addrmap =
2102 addrmap_create_mutable (&objfile->objfile_obstack);
2104 /* Since the objects we're extracting from .debug_info vary in
2105 length, only the individual functions to extract them (like
2106 read_comp_unit_head and load_partial_die) can really know whether
2107 the buffer is large enough to hold another complete object.
2109 At the moment, they don't actually check that. If .debug_info
2110 holds just one extra byte after the last compilation unit's dies,
2111 then read_comp_unit_head will happily read off the end of the
2112 buffer. read_partial_die is similarly casual. Those functions
2115 For this loop condition, simply checking whether there's any data
2116 left at all should be sufficient. */
2118 while (info_ptr < (dwarf2_per_objfile->info.buffer
2119 + dwarf2_per_objfile->info.size))
2121 struct dwarf2_per_cu_data *this_cu;
2123 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
2126 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
2127 dwarf2_per_objfile->info.buffer,
2129 dwarf2_per_objfile->info.size);
2132 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
2133 &objfile->objfile_obstack);
2135 do_cleanups (back_to);
2138 /* Load the partial DIEs for a secondary CU into memory. */
2141 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
2142 struct objfile *objfile)
2144 bfd *abfd = objfile->obfd;
2145 gdb_byte *info_ptr, *beg_of_comp_unit;
2146 struct die_info *comp_unit_die;
2147 struct dwarf2_cu *cu;
2148 unsigned int bytes_read;
2149 struct cleanup *back_to;
2150 struct attribute *attr;
2152 struct die_reader_specs reader_specs;
2154 gdb_assert (! this_cu->from_debug_types);
2156 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
2157 beg_of_comp_unit = info_ptr;
2159 cu = alloc_one_comp_unit (objfile);
2161 /* ??? Missing cleanup for CU? */
2163 /* Link this compilation unit into the compilation unit tree. */
2165 cu->per_cu = this_cu;
2166 cu->type_hash = this_cu->type_hash;
2168 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
2169 dwarf2_per_objfile->info.buffer,
2170 dwarf2_per_objfile->info.size,
2173 /* Complete the cu_header. */
2174 cu->header.offset = this_cu->offset;
2175 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
2177 /* Read the abbrevs for this compilation unit into a table. */
2178 dwarf2_read_abbrevs (abfd, cu);
2179 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2181 /* Read the compilation unit die. */
2182 init_cu_die_reader (&reader_specs, cu);
2183 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2186 /* Set the language we're debugging. */
2187 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
2189 set_cu_language (DW_UNSND (attr), cu);
2191 set_cu_language (language_minimal, cu);
2193 /* Check if comp unit has_children.
2194 If so, read the rest of the partial symbols from this comp unit.
2195 If not, there's no more debug_info for this comp unit. */
2197 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
2199 do_cleanups (back_to);
2202 /* Create a list of all compilation units in OBJFILE. We do this only
2203 if an inter-comp-unit reference is found; presumably if there is one,
2204 there will be many, and one will occur early in the .debug_info section.
2205 So there's no point in building this list incrementally. */
2208 create_all_comp_units (struct objfile *objfile)
2212 struct dwarf2_per_cu_data **all_comp_units;
2213 gdb_byte *info_ptr = dwarf2_per_objfile->info.buffer;
2217 all_comp_units = xmalloc (n_allocated
2218 * sizeof (struct dwarf2_per_cu_data *));
2220 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
2222 unsigned int length, initial_length_size;
2223 gdb_byte *beg_of_comp_unit;
2224 struct dwarf2_per_cu_data *this_cu;
2225 unsigned int offset;
2227 offset = info_ptr - dwarf2_per_objfile->info.buffer;
2229 /* Read just enough information to find out where the next
2230 compilation unit is. */
2231 length = read_initial_length (objfile->obfd, info_ptr,
2232 &initial_length_size);
2234 /* Save the compilation unit for later lookup. */
2235 this_cu = obstack_alloc (&objfile->objfile_obstack,
2236 sizeof (struct dwarf2_per_cu_data));
2237 memset (this_cu, 0, sizeof (*this_cu));
2238 this_cu->offset = offset;
2239 this_cu->length = length + initial_length_size;
2241 if (n_comp_units == n_allocated)
2244 all_comp_units = xrealloc (all_comp_units,
2246 * sizeof (struct dwarf2_per_cu_data *));
2248 all_comp_units[n_comp_units++] = this_cu;
2250 info_ptr = info_ptr + this_cu->length;
2253 dwarf2_per_objfile->all_comp_units
2254 = obstack_alloc (&objfile->objfile_obstack,
2255 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2256 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
2257 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2258 xfree (all_comp_units);
2259 dwarf2_per_objfile->n_comp_units = n_comp_units;
2262 /* Process all loaded DIEs for compilation unit CU, starting at
2263 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2264 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2265 DW_AT_ranges). If NEED_PC is set, then this function will set
2266 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2267 and record the covered ranges in the addrmap. */
2270 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
2271 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2273 struct objfile *objfile = cu->objfile;
2274 bfd *abfd = objfile->obfd;
2275 struct partial_die_info *pdi;
2277 /* Now, march along the PDI's, descending into ones which have
2278 interesting children but skipping the children of the other ones,
2279 until we reach the end of the compilation unit. */
2285 fixup_partial_die (pdi, cu);
2287 /* Anonymous namespaces have no name but have interesting
2288 children, so we need to look at them. Ditto for anonymous
2291 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
2292 || pdi->tag == DW_TAG_enumeration_type)
2296 case DW_TAG_subprogram:
2297 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2299 case DW_TAG_variable:
2300 case DW_TAG_typedef:
2301 case DW_TAG_union_type:
2302 if (!pdi->is_declaration)
2304 add_partial_symbol (pdi, cu);
2307 case DW_TAG_class_type:
2308 case DW_TAG_interface_type:
2309 case DW_TAG_structure_type:
2310 if (!pdi->is_declaration)
2312 add_partial_symbol (pdi, cu);
2315 case DW_TAG_enumeration_type:
2316 if (!pdi->is_declaration)
2317 add_partial_enumeration (pdi, cu);
2319 case DW_TAG_base_type:
2320 case DW_TAG_subrange_type:
2321 /* File scope base type definitions are added to the partial
2323 add_partial_symbol (pdi, cu);
2325 case DW_TAG_namespace:
2326 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
2329 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
2336 /* If the die has a sibling, skip to the sibling. */
2338 pdi = pdi->die_sibling;
2342 /* Functions used to compute the fully scoped name of a partial DIE.
2344 Normally, this is simple. For C++, the parent DIE's fully scoped
2345 name is concatenated with "::" and the partial DIE's name. For
2346 Java, the same thing occurs except that "." is used instead of "::".
2347 Enumerators are an exception; they use the scope of their parent
2348 enumeration type, i.e. the name of the enumeration type is not
2349 prepended to the enumerator.
2351 There are two complexities. One is DW_AT_specification; in this
2352 case "parent" means the parent of the target of the specification,
2353 instead of the direct parent of the DIE. The other is compilers
2354 which do not emit DW_TAG_namespace; in this case we try to guess
2355 the fully qualified name of structure types from their members'
2356 linkage names. This must be done using the DIE's children rather
2357 than the children of any DW_AT_specification target. We only need
2358 to do this for structures at the top level, i.e. if the target of
2359 any DW_AT_specification (if any; otherwise the DIE itself) does not
2362 /* Compute the scope prefix associated with PDI's parent, in
2363 compilation unit CU. The result will be allocated on CU's
2364 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2365 field. NULL is returned if no prefix is necessary. */
2367 partial_die_parent_scope (struct partial_die_info *pdi,
2368 struct dwarf2_cu *cu)
2370 char *grandparent_scope;
2371 struct partial_die_info *parent, *real_pdi;
2373 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2374 then this means the parent of the specification DIE. */
2377 while (real_pdi->has_specification)
2378 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2380 parent = real_pdi->die_parent;
2384 if (parent->scope_set)
2385 return parent->scope;
2387 fixup_partial_die (parent, cu);
2389 grandparent_scope = partial_die_parent_scope (parent, cu);
2391 if (parent->tag == DW_TAG_namespace
2392 || parent->tag == DW_TAG_structure_type
2393 || parent->tag == DW_TAG_class_type
2394 || parent->tag == DW_TAG_interface_type
2395 || parent->tag == DW_TAG_union_type)
2397 if (grandparent_scope == NULL)
2398 parent->scope = parent->name;
2400 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
2403 else if (parent->tag == DW_TAG_enumeration_type)
2404 /* Enumerators should not get the name of the enumeration as a prefix. */
2405 parent->scope = grandparent_scope;
2408 /* FIXME drow/2004-04-01: What should we be doing with
2409 function-local names? For partial symbols, we should probably be
2411 complaint (&symfile_complaints,
2412 _("unhandled containing DIE tag %d for DIE at %d"),
2413 parent->tag, pdi->offset);
2414 parent->scope = grandparent_scope;
2417 parent->scope_set = 1;
2418 return parent->scope;
2421 /* Return the fully scoped name associated with PDI, from compilation unit
2422 CU. The result will be allocated with malloc. */
2424 partial_die_full_name (struct partial_die_info *pdi,
2425 struct dwarf2_cu *cu)
2429 parent_scope = partial_die_parent_scope (pdi, cu);
2430 if (parent_scope == NULL)
2433 return typename_concat (NULL, parent_scope, pdi->name, cu);
2437 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
2439 struct objfile *objfile = cu->objfile;
2441 char *actual_name = NULL;
2442 const char *my_prefix;
2443 const struct partial_symbol *psym = NULL;
2445 int built_actual_name = 0;
2447 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2449 if (pdi_needs_namespace (pdi->tag))
2451 actual_name = partial_die_full_name (pdi, cu);
2453 built_actual_name = 1;
2456 if (actual_name == NULL)
2457 actual_name = pdi->name;
2461 case DW_TAG_subprogram:
2462 if (pdi->is_external || cu->language == language_ada)
2464 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2465 of the global scope. But in Ada, we want to be able to access
2466 nested procedures globally. So all Ada subprograms are stored
2467 in the global scope. */
2468 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2469 mst_text, objfile); */
2470 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2472 VAR_DOMAIN, LOC_BLOCK,
2473 &objfile->global_psymbols,
2474 0, pdi->lowpc + baseaddr,
2475 cu->language, objfile);
2479 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2480 mst_file_text, objfile); */
2481 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2483 VAR_DOMAIN, LOC_BLOCK,
2484 &objfile->static_psymbols,
2485 0, pdi->lowpc + baseaddr,
2486 cu->language, objfile);
2489 case DW_TAG_variable:
2490 if (pdi->is_external)
2493 Don't enter into the minimal symbol tables as there is
2494 a minimal symbol table entry from the ELF symbols already.
2495 Enter into partial symbol table if it has a location
2496 descriptor or a type.
2497 If the location descriptor is missing, new_symbol will create
2498 a LOC_UNRESOLVED symbol, the address of the variable will then
2499 be determined from the minimal symbol table whenever the variable
2501 The address for the partial symbol table entry is not
2502 used by GDB, but it comes in handy for debugging partial symbol
2506 addr = decode_locdesc (pdi->locdesc, cu);
2507 if (pdi->locdesc || pdi->has_type)
2508 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2510 VAR_DOMAIN, LOC_STATIC,
2511 &objfile->global_psymbols,
2513 cu->language, objfile);
2517 /* Static Variable. Skip symbols without location descriptors. */
2518 if (pdi->locdesc == NULL)
2520 if (built_actual_name)
2521 xfree (actual_name);
2524 addr = decode_locdesc (pdi->locdesc, cu);
2525 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2526 mst_file_data, objfile); */
2527 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2529 VAR_DOMAIN, LOC_STATIC,
2530 &objfile->static_psymbols,
2532 cu->language, objfile);
2535 case DW_TAG_typedef:
2536 case DW_TAG_base_type:
2537 case DW_TAG_subrange_type:
2538 add_psymbol_to_list (actual_name, strlen (actual_name),
2540 VAR_DOMAIN, LOC_TYPEDEF,
2541 &objfile->static_psymbols,
2542 0, (CORE_ADDR) 0, cu->language, objfile);
2544 case DW_TAG_namespace:
2545 add_psymbol_to_list (actual_name, strlen (actual_name),
2547 VAR_DOMAIN, LOC_TYPEDEF,
2548 &objfile->global_psymbols,
2549 0, (CORE_ADDR) 0, cu->language, objfile);
2551 case DW_TAG_class_type:
2552 case DW_TAG_interface_type:
2553 case DW_TAG_structure_type:
2554 case DW_TAG_union_type:
2555 case DW_TAG_enumeration_type:
2556 /* Skip external references. The DWARF standard says in the section
2557 about "Structure, Union, and Class Type Entries": "An incomplete
2558 structure, union or class type is represented by a structure,
2559 union or class entry that does not have a byte size attribute
2560 and that has a DW_AT_declaration attribute." */
2561 if (!pdi->has_byte_size && pdi->is_declaration)
2563 if (built_actual_name)
2564 xfree (actual_name);
2568 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2569 static vs. global. */
2570 add_psymbol_to_list (actual_name, strlen (actual_name),
2572 STRUCT_DOMAIN, LOC_TYPEDEF,
2573 (cu->language == language_cplus
2574 || cu->language == language_java)
2575 ? &objfile->global_psymbols
2576 : &objfile->static_psymbols,
2577 0, (CORE_ADDR) 0, cu->language, objfile);
2580 case DW_TAG_enumerator:
2581 add_psymbol_to_list (actual_name, strlen (actual_name),
2583 VAR_DOMAIN, LOC_CONST,
2584 (cu->language == language_cplus
2585 || cu->language == language_java)
2586 ? &objfile->global_psymbols
2587 : &objfile->static_psymbols,
2588 0, (CORE_ADDR) 0, cu->language, objfile);
2594 /* Check to see if we should scan the name for possible namespace
2595 info. Only do this if this is C++, if we don't have namespace
2596 debugging info in the file, if the psym is of an appropriate type
2597 (otherwise we'll have psym == NULL), and if we actually had a
2598 mangled name to begin with. */
2600 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2601 cases which do not set PSYM above? */
2603 if (cu->language == language_cplus
2604 && cu->has_namespace_info == 0
2606 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
2607 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
2610 if (built_actual_name)
2611 xfree (actual_name);
2614 /* Determine whether a die of type TAG living in a C++ class or
2615 namespace needs to have the name of the scope prepended to the
2616 name listed in the die. */
2619 pdi_needs_namespace (enum dwarf_tag tag)
2623 case DW_TAG_namespace:
2624 case DW_TAG_typedef:
2625 case DW_TAG_class_type:
2626 case DW_TAG_interface_type:
2627 case DW_TAG_structure_type:
2628 case DW_TAG_union_type:
2629 case DW_TAG_enumeration_type:
2630 case DW_TAG_enumerator:
2637 /* Read a partial die corresponding to a namespace; also, add a symbol
2638 corresponding to that namespace to the symbol table. NAMESPACE is
2639 the name of the enclosing namespace. */
2642 add_partial_namespace (struct partial_die_info *pdi,
2643 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2644 int need_pc, struct dwarf2_cu *cu)
2646 struct objfile *objfile = cu->objfile;
2648 /* Add a symbol for the namespace. */
2650 add_partial_symbol (pdi, cu);
2652 /* Now scan partial symbols in that namespace. */
2654 if (pdi->has_children)
2655 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2658 /* Read a partial die corresponding to a Fortran module. */
2661 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
2662 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2664 /* Now scan partial symbols in that module.
2666 FIXME: Support the separate Fortran module namespaces. */
2668 if (pdi->has_children)
2669 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2672 /* Read a partial die corresponding to a subprogram and create a partial
2673 symbol for that subprogram. When the CU language allows it, this
2674 routine also defines a partial symbol for each nested subprogram
2675 that this subprogram contains.
2677 DIE my also be a lexical block, in which case we simply search
2678 recursively for suprograms defined inside that lexical block.
2679 Again, this is only performed when the CU language allows this
2680 type of definitions. */
2683 add_partial_subprogram (struct partial_die_info *pdi,
2684 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2685 int need_pc, struct dwarf2_cu *cu)
2687 if (pdi->tag == DW_TAG_subprogram)
2689 if (pdi->has_pc_info)
2691 if (pdi->lowpc < *lowpc)
2692 *lowpc = pdi->lowpc;
2693 if (pdi->highpc > *highpc)
2694 *highpc = pdi->highpc;
2698 struct objfile *objfile = cu->objfile;
2700 baseaddr = ANOFFSET (objfile->section_offsets,
2701 SECT_OFF_TEXT (objfile));
2702 addrmap_set_empty (objfile->psymtabs_addrmap,
2703 pdi->lowpc, pdi->highpc - 1,
2704 cu->per_cu->psymtab);
2706 if (!pdi->is_declaration)
2707 add_partial_symbol (pdi, cu);
2711 if (! pdi->has_children)
2714 if (cu->language == language_ada)
2716 pdi = pdi->die_child;
2719 fixup_partial_die (pdi, cu);
2720 if (pdi->tag == DW_TAG_subprogram
2721 || pdi->tag == DW_TAG_lexical_block)
2722 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2723 pdi = pdi->die_sibling;
2728 /* See if we can figure out if the class lives in a namespace. We do
2729 this by looking for a member function; its demangled name will
2730 contain namespace info, if there is any. */
2733 guess_structure_name (struct partial_die_info *struct_pdi,
2734 struct dwarf2_cu *cu)
2736 if ((cu->language == language_cplus
2737 || cu->language == language_java)
2738 && cu->has_namespace_info == 0
2739 && struct_pdi->has_children)
2741 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2742 what template types look like, because the demangler
2743 frequently doesn't give the same name as the debug info. We
2744 could fix this by only using the demangled name to get the
2745 prefix (but see comment in read_structure_type). */
2747 struct partial_die_info *child_pdi = struct_pdi->die_child;
2748 struct partial_die_info *real_pdi;
2750 /* If this DIE (this DIE's specification, if any) has a parent, then
2751 we should not do this. We'll prepend the parent's fully qualified
2752 name when we create the partial symbol. */
2754 real_pdi = struct_pdi;
2755 while (real_pdi->has_specification)
2756 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2758 if (real_pdi->die_parent != NULL)
2761 while (child_pdi != NULL)
2763 if (child_pdi->tag == DW_TAG_subprogram)
2765 char *actual_class_name
2766 = language_class_name_from_physname (cu->language_defn,
2768 if (actual_class_name != NULL)
2771 = obsavestring (actual_class_name,
2772 strlen (actual_class_name),
2773 &cu->comp_unit_obstack);
2774 xfree (actual_class_name);
2779 child_pdi = child_pdi->die_sibling;
2784 /* Read a partial die corresponding to an enumeration type. */
2787 add_partial_enumeration (struct partial_die_info *enum_pdi,
2788 struct dwarf2_cu *cu)
2790 struct objfile *objfile = cu->objfile;
2791 bfd *abfd = objfile->obfd;
2792 struct partial_die_info *pdi;
2794 if (enum_pdi->name != NULL)
2795 add_partial_symbol (enum_pdi, cu);
2797 pdi = enum_pdi->die_child;
2800 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2801 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2803 add_partial_symbol (pdi, cu);
2804 pdi = pdi->die_sibling;
2808 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2809 Return the corresponding abbrev, or NULL if the number is zero (indicating
2810 an empty DIE). In either case *BYTES_READ will be set to the length of
2811 the initial number. */
2813 static struct abbrev_info *
2814 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2815 struct dwarf2_cu *cu)
2817 bfd *abfd = cu->objfile->obfd;
2818 unsigned int abbrev_number;
2819 struct abbrev_info *abbrev;
2821 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2823 if (abbrev_number == 0)
2826 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2829 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2830 bfd_get_filename (abfd));
2836 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2837 Returns a pointer to the end of a series of DIEs, terminated by an empty
2838 DIE. Any children of the skipped DIEs will also be skipped. */
2841 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
2843 struct abbrev_info *abbrev;
2844 unsigned int bytes_read;
2848 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2850 return info_ptr + bytes_read;
2852 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
2856 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2857 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2858 abbrev corresponding to that skipped uleb128 should be passed in
2859 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2863 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
2864 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
2866 unsigned int bytes_read;
2867 struct attribute attr;
2868 bfd *abfd = cu->objfile->obfd;
2869 unsigned int form, i;
2871 for (i = 0; i < abbrev->num_attrs; i++)
2873 /* The only abbrev we care about is DW_AT_sibling. */
2874 if (abbrev->attrs[i].name == DW_AT_sibling)
2876 read_attribute (&attr, &abbrev->attrs[i],
2877 abfd, info_ptr, cu);
2878 if (attr.form == DW_FORM_ref_addr)
2879 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2881 return buffer + dwarf2_get_ref_die_offset (&attr);
2884 /* If it isn't DW_AT_sibling, skip this attribute. */
2885 form = abbrev->attrs[i].form;
2890 case DW_FORM_ref_addr:
2891 info_ptr += cu->header.addr_size;
2911 case DW_FORM_string:
2912 read_string (abfd, info_ptr, &bytes_read);
2913 info_ptr += bytes_read;
2916 info_ptr += cu->header.offset_size;
2919 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2920 info_ptr += bytes_read;
2922 case DW_FORM_block1:
2923 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2925 case DW_FORM_block2:
2926 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2928 case DW_FORM_block4:
2929 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2933 case DW_FORM_ref_udata:
2934 info_ptr = skip_leb128 (abfd, info_ptr);
2936 case DW_FORM_indirect:
2937 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2938 info_ptr += bytes_read;
2939 /* We need to continue parsing from here, so just go back to
2941 goto skip_attribute;
2944 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2945 dwarf_form_name (form),
2946 bfd_get_filename (abfd));
2950 if (abbrev->has_children)
2951 return skip_children (buffer, info_ptr, cu);
2956 /* Locate ORIG_PDI's sibling.
2957 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2961 locate_pdi_sibling (struct partial_die_info *orig_pdi,
2962 gdb_byte *buffer, gdb_byte *info_ptr,
2963 bfd *abfd, struct dwarf2_cu *cu)
2965 /* Do we know the sibling already? */
2967 if (orig_pdi->sibling)
2968 return orig_pdi->sibling;
2970 /* Are there any children to deal with? */
2972 if (!orig_pdi->has_children)
2975 /* Skip the children the long way. */
2977 return skip_children (buffer, info_ptr, cu);
2980 /* Expand this partial symbol table into a full symbol table. */
2983 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2985 /* FIXME: This is barely more than a stub. */
2990 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2996 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2997 gdb_flush (gdb_stdout);
3000 /* Restore our global data. */
3001 dwarf2_per_objfile = objfile_data (pst->objfile,
3002 dwarf2_objfile_data_key);
3004 /* If this psymtab is constructed from a debug-only objfile, the
3005 has_section_at_zero flag will not necessarily be correct. We
3006 can get the correct value for this flag by looking at the data
3007 associated with the (presumably stripped) associated objfile. */
3008 if (pst->objfile->separate_debug_objfile_backlink)
3010 struct dwarf2_per_objfile *dpo_backlink
3011 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
3012 dwarf2_objfile_data_key);
3013 dwarf2_per_objfile->has_section_at_zero
3014 = dpo_backlink->has_section_at_zero;
3017 psymtab_to_symtab_1 (pst);
3019 /* Finish up the debug error message. */
3021 printf_filtered (_("done.\n"));
3026 /* Add PER_CU to the queue. */
3029 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3031 struct dwarf2_queue_item *item;
3034 item = xmalloc (sizeof (*item));
3035 item->per_cu = per_cu;
3038 if (dwarf2_queue == NULL)
3039 dwarf2_queue = item;
3041 dwarf2_queue_tail->next = item;
3043 dwarf2_queue_tail = item;
3046 /* Process the queue. */
3049 process_queue (struct objfile *objfile)
3051 struct dwarf2_queue_item *item, *next_item;
3053 /* The queue starts out with one item, but following a DIE reference
3054 may load a new CU, adding it to the end of the queue. */
3055 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
3057 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
3058 process_full_comp_unit (item->per_cu);
3060 item->per_cu->queued = 0;
3061 next_item = item->next;
3065 dwarf2_queue_tail = NULL;
3068 /* Free all allocated queue entries. This function only releases anything if
3069 an error was thrown; if the queue was processed then it would have been
3070 freed as we went along. */
3073 dwarf2_release_queue (void *dummy)
3075 struct dwarf2_queue_item *item, *last;
3077 item = dwarf2_queue;
3080 /* Anything still marked queued is likely to be in an
3081 inconsistent state, so discard it. */
3082 if (item->per_cu->queued)
3084 if (item->per_cu->cu != NULL)
3085 free_one_cached_comp_unit (item->per_cu->cu);
3086 item->per_cu->queued = 0;
3094 dwarf2_queue = dwarf2_queue_tail = NULL;
3097 /* Read in full symbols for PST, and anything it depends on. */
3100 psymtab_to_symtab_1 (struct partial_symtab *pst)
3102 struct dwarf2_per_cu_data *per_cu;
3103 struct cleanup *back_to;
3106 for (i = 0; i < pst->number_of_dependencies; i++)
3107 if (!pst->dependencies[i]->readin)
3109 /* Inform about additional files that need to be read in. */
3112 /* FIXME: i18n: Need to make this a single string. */
3113 fputs_filtered (" ", gdb_stdout);
3115 fputs_filtered ("and ", gdb_stdout);
3117 printf_filtered ("%s...", pst->dependencies[i]->filename);
3118 wrap_here (""); /* Flush output */
3119 gdb_flush (gdb_stdout);
3121 psymtab_to_symtab_1 (pst->dependencies[i]);
3124 per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
3128 /* It's an include file, no symbols to read for it.
3129 Everything is in the parent symtab. */
3134 back_to = make_cleanup (dwarf2_release_queue, NULL);
3136 queue_comp_unit (per_cu, pst->objfile);
3138 if (per_cu->from_debug_types)
3139 read_signatured_type_at_offset (pst->objfile, per_cu->offset);
3141 load_full_comp_unit (per_cu, pst->objfile);
3143 process_queue (pst->objfile);
3145 /* Age the cache, releasing compilation units that have not
3146 been used recently. */
3147 age_cached_comp_units ();
3149 do_cleanups (back_to);
3152 /* Load the DIEs associated with PER_CU into memory. */
3155 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3157 bfd *abfd = objfile->obfd;
3158 struct dwarf2_cu *cu;
3159 unsigned int offset;
3160 gdb_byte *info_ptr, *beg_of_comp_unit;
3161 struct cleanup *back_to, *free_cu_cleanup;
3162 struct attribute *attr;
3165 gdb_assert (! per_cu->from_debug_types);
3167 /* Set local variables from the partial symbol table info. */
3168 offset = per_cu->offset;
3170 info_ptr = dwarf2_per_objfile->info.buffer + offset;
3171 beg_of_comp_unit = info_ptr;
3173 cu = alloc_one_comp_unit (objfile);
3175 /* If an error occurs while loading, release our storage. */
3176 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3178 /* Read in the comp_unit header. */
3179 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
3181 /* Complete the cu_header. */
3182 cu->header.offset = offset;
3183 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3185 /* Read the abbrevs for this compilation unit. */
3186 dwarf2_read_abbrevs (abfd, cu);
3187 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
3189 /* Link this compilation unit into the compilation unit tree. */
3191 cu->per_cu = per_cu;
3192 cu->type_hash = per_cu->type_hash;
3194 cu->dies = read_comp_unit (info_ptr, cu);
3196 /* We try not to read any attributes in this function, because not
3197 all objfiles needed for references have been loaded yet, and symbol
3198 table processing isn't initialized. But we have to set the CU language,
3199 or we won't be able to build types correctly. */
3200 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
3202 set_cu_language (DW_UNSND (attr), cu);
3204 set_cu_language (language_minimal, cu);
3206 /* Link this CU into read_in_chain. */
3207 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3208 dwarf2_per_objfile->read_in_chain = per_cu;
3210 do_cleanups (back_to);
3212 /* We've successfully allocated this compilation unit. Let our caller
3213 clean it up when finished with it. */
3214 discard_cleanups (free_cu_cleanup);
3217 /* Generate full symbol information for PST and CU, whose DIEs have
3218 already been loaded into memory. */
3221 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
3223 struct partial_symtab *pst = per_cu->psymtab;
3224 struct dwarf2_cu *cu = per_cu->cu;
3225 struct objfile *objfile = pst->objfile;
3226 bfd *abfd = objfile->obfd;
3227 CORE_ADDR lowpc, highpc;
3228 struct symtab *symtab;
3229 struct cleanup *back_to;
3232 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3235 back_to = make_cleanup (really_free_pendings, NULL);
3237 cu->list_in_scope = &file_symbols;
3239 dwarf2_find_base_address (cu->dies, cu);
3241 /* Do line number decoding in read_file_scope () */
3242 process_die (cu->dies, cu);
3244 /* Some compilers don't define a DW_AT_high_pc attribute for the
3245 compilation unit. If the DW_AT_high_pc is missing, synthesize
3246 it, by scanning the DIE's below the compilation unit. */
3247 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
3249 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
3251 /* Set symtab language to language from DW_AT_language.
3252 If the compilation is from a C file generated by language preprocessors,
3253 do not set the language if it was already deduced by start_subfile. */
3255 && !(cu->language == language_c && symtab->language != language_c))
3257 symtab->language = cu->language;
3259 pst->symtab = symtab;
3262 do_cleanups (back_to);
3265 /* Process a die and its children. */
3268 process_die (struct die_info *die, struct dwarf2_cu *cu)
3272 case DW_TAG_padding:
3274 case DW_TAG_compile_unit:
3275 read_file_scope (die, cu);
3277 case DW_TAG_type_unit:
3278 read_type_unit_scope (die, cu);
3280 case DW_TAG_subprogram:
3281 case DW_TAG_inlined_subroutine:
3282 read_func_scope (die, cu);
3284 case DW_TAG_lexical_block:
3285 case DW_TAG_try_block:
3286 case DW_TAG_catch_block:
3287 read_lexical_block_scope (die, cu);
3289 case DW_TAG_class_type:
3290 case DW_TAG_interface_type:
3291 case DW_TAG_structure_type:
3292 case DW_TAG_union_type:
3293 process_structure_scope (die, cu);
3295 case DW_TAG_enumeration_type:
3296 process_enumeration_scope (die, cu);
3299 /* These dies have a type, but processing them does not create
3300 a symbol or recurse to process the children. Therefore we can
3301 read them on-demand through read_type_die. */
3302 case DW_TAG_subroutine_type:
3303 case DW_TAG_set_type:
3304 case DW_TAG_array_type:
3305 case DW_TAG_pointer_type:
3306 case DW_TAG_ptr_to_member_type:
3307 case DW_TAG_reference_type:
3308 case DW_TAG_string_type:
3311 case DW_TAG_base_type:
3312 case DW_TAG_subrange_type:
3313 case DW_TAG_typedef:
3314 /* Add a typedef symbol for the type definition, if it has a
3316 new_symbol (die, read_type_die (die, cu), cu);
3318 case DW_TAG_common_block:
3319 read_common_block (die, cu);
3321 case DW_TAG_common_inclusion:
3323 case DW_TAG_namespace:
3324 processing_has_namespace_info = 1;
3325 read_namespace (die, cu);
3328 read_module (die, cu);
3330 case DW_TAG_imported_declaration:
3331 case DW_TAG_imported_module:
3332 processing_has_namespace_info = 1;
3333 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
3334 || cu->language != language_fortran))
3335 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
3336 dwarf_tag_name (die->tag));
3337 read_import_statement (die, cu);
3340 new_symbol (die, NULL, cu);
3345 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3346 If scope qualifiers are appropriate they will be added. The result
3347 will be allocated on the objfile_obstack, or NULL if the DIE does
3351 dwarf2_full_name (struct die_info *die, struct dwarf2_cu *cu)
3353 struct attribute *attr;
3354 char *prefix, *name;
3355 struct ui_file *buf = NULL;
3357 name = dwarf2_name (die, cu);
3361 /* These are the only languages we know how to qualify names in. */
3362 if (cu->language != language_cplus
3363 && cu->language != language_java)
3366 /* If no prefix is necessary for this type of DIE, return the
3367 unqualified name. The other three tags listed could be handled
3368 in pdi_needs_namespace, but that requires broader changes. */
3369 if (!pdi_needs_namespace (die->tag)
3370 && die->tag != DW_TAG_subprogram
3371 && die->tag != DW_TAG_variable
3372 && die->tag != DW_TAG_member)
3375 prefix = determine_prefix (die, cu);
3376 if (*prefix != '\0')
3377 name = typename_concat (&cu->objfile->objfile_obstack, prefix,
3383 /* Read the import statement specified by the given die and record it. */
3386 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
3388 struct attribute *import_attr;
3389 struct die_info *imported_die;
3390 struct dwarf2_cu *imported_cu;
3391 const char *imported_name;
3392 const char *imported_name_prefix;
3393 const char *import_prefix;
3394 char *canonical_name;
3396 import_attr = dwarf2_attr (die, DW_AT_import, cu);
3397 if (import_attr == NULL)
3399 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
3400 dwarf_tag_name (die->tag));
3405 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
3406 imported_name = dwarf2_name (imported_die, imported_cu);
3407 if (imported_name == NULL)
3409 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3411 The import in the following code:
3425 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3426 <52> DW_AT_decl_file : 1
3427 <53> DW_AT_decl_line : 6
3428 <54> DW_AT_import : <0x75>
3429 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3431 <5b> DW_AT_decl_file : 1
3432 <5c> DW_AT_decl_line : 2
3433 <5d> DW_AT_type : <0x6e>
3435 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3436 <76> DW_AT_byte_size : 4
3437 <77> DW_AT_encoding : 5 (signed)
3439 imports the wrong die ( 0x75 instead of 0x58 ).
3440 This case will be ignored until the gcc bug is fixed. */
3444 /* FIXME: dwarf2_name (die); for the local name after import. */
3446 /* Figure out where the statement is being imported to. */
3447 import_prefix = determine_prefix (die, cu);
3449 /* Figure out what the scope of the imported die is and prepend it
3450 to the name of the imported die. */
3451 imported_name_prefix = determine_prefix (imported_die, imported_cu);
3453 if (strlen (imported_name_prefix) > 0)
3455 canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1);
3456 strcpy (canonical_name, imported_name_prefix);
3457 strcat (canonical_name, "::");
3458 strcat (canonical_name, imported_name);
3462 canonical_name = alloca (strlen (imported_name) + 1);
3463 strcpy (canonical_name, imported_name);
3466 using_directives = cp_add_using (import_prefix,canonical_name, using_directives);
3470 initialize_cu_func_list (struct dwarf2_cu *cu)
3472 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
3476 free_cu_line_header (void *arg)
3478 struct dwarf2_cu *cu = arg;
3480 free_line_header (cu->line_header);
3481 cu->line_header = NULL;
3485 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
3487 struct objfile *objfile = cu->objfile;
3488 struct comp_unit_head *cu_header = &cu->header;
3489 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3490 CORE_ADDR lowpc = ((CORE_ADDR) -1);
3491 CORE_ADDR highpc = ((CORE_ADDR) 0);
3492 struct attribute *attr;
3494 char *comp_dir = NULL;
3495 struct die_info *child_die;
3496 bfd *abfd = objfile->obfd;
3497 struct line_header *line_header = 0;
3500 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3502 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
3504 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3505 from finish_block. */
3506 if (lowpc == ((CORE_ADDR) -1))
3511 /* Find the filename. Do not use dwarf2_name here, since the filename
3512 is not a source language identifier. */
3513 attr = dwarf2_attr (die, DW_AT_name, cu);
3516 name = DW_STRING (attr);
3519 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3521 comp_dir = DW_STRING (attr);
3522 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3524 comp_dir = ldirname (name);
3525 if (comp_dir != NULL)
3526 make_cleanup (xfree, comp_dir);
3528 if (comp_dir != NULL)
3530 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3531 directory, get rid of it. */
3532 char *cp = strchr (comp_dir, ':');
3534 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
3541 attr = dwarf2_attr (die, DW_AT_language, cu);
3544 set_cu_language (DW_UNSND (attr), cu);
3547 attr = dwarf2_attr (die, DW_AT_producer, cu);
3549 cu->producer = DW_STRING (attr);
3551 /* We assume that we're processing GCC output. */
3552 processing_gcc_compilation = 2;
3554 processing_has_namespace_info = 0;
3556 start_symtab (name, comp_dir, lowpc);
3557 record_debugformat ("DWARF 2");
3558 record_producer (cu->producer);
3560 initialize_cu_func_list (cu);
3562 /* Decode line number information if present. We do this before
3563 processing child DIEs, so that the line header table is available
3564 for DW_AT_decl_file. */
3565 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
3568 unsigned int line_offset = DW_UNSND (attr);
3569 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
3572 cu->line_header = line_header;
3573 make_cleanup (free_cu_line_header, cu);
3574 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
3578 /* Process all dies in compilation unit. */
3579 if (die->child != NULL)
3581 child_die = die->child;
3582 while (child_die && child_die->tag)
3584 process_die (child_die, cu);
3585 child_die = sibling_die (child_die);
3589 /* Decode macro information, if present. Dwarf 2 macro information
3590 refers to information in the line number info statement program
3591 header, so we can only read it if we've read the header
3593 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
3594 if (attr && line_header)
3596 unsigned int macro_offset = DW_UNSND (attr);
3597 dwarf_decode_macros (line_header, macro_offset,
3598 comp_dir, abfd, cu);
3600 do_cleanups (back_to);
3603 /* For TUs we want to skip the first top level sibling if it's not the
3604 actual type being defined by this TU. In this case the first top
3605 level sibling is there to provide context only. */
3608 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
3610 struct objfile *objfile = cu->objfile;
3611 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3613 struct attribute *attr;
3615 char *comp_dir = NULL;
3616 struct die_info *child_die;
3617 bfd *abfd = objfile->obfd;
3618 struct line_header *line_header = 0;
3620 /* start_symtab needs a low pc, but we don't really have one.
3621 Do what read_file_scope would do in the absence of such info. */
3622 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3624 /* Find the filename. Do not use dwarf2_name here, since the filename
3625 is not a source language identifier. */
3626 attr = dwarf2_attr (die, DW_AT_name, cu);
3628 name = DW_STRING (attr);
3630 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3632 comp_dir = DW_STRING (attr);
3633 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3635 comp_dir = ldirname (name);
3636 if (comp_dir != NULL)
3637 make_cleanup (xfree, comp_dir);
3643 attr = dwarf2_attr (die, DW_AT_language, cu);
3645 set_cu_language (DW_UNSND (attr), cu);
3647 /* This isn't technically needed today. It is done for symmetry
3648 with read_file_scope. */
3649 attr = dwarf2_attr (die, DW_AT_producer, cu);
3651 cu->producer = DW_STRING (attr);
3653 /* We assume that we're processing GCC output. */
3654 processing_gcc_compilation = 2;
3656 processing_has_namespace_info = 0;
3658 start_symtab (name, comp_dir, lowpc);
3659 record_debugformat ("DWARF 2");
3660 record_producer (cu->producer);
3662 /* Process the dies in the type unit. */
3663 if (die->child == NULL)
3665 dump_die_for_error (die);
3666 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3667 bfd_get_filename (abfd));
3670 child_die = die->child;
3672 while (child_die && child_die->tag)
3674 process_die (child_die, cu);
3676 child_die = sibling_die (child_die);
3679 do_cleanups (back_to);
3683 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
3684 struct dwarf2_cu *cu)
3686 struct function_range *thisfn;
3688 thisfn = (struct function_range *)
3689 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
3690 thisfn->name = name;
3691 thisfn->lowpc = lowpc;
3692 thisfn->highpc = highpc;
3693 thisfn->seen_line = 0;
3694 thisfn->next = NULL;
3696 if (cu->last_fn == NULL)
3697 cu->first_fn = thisfn;
3699 cu->last_fn->next = thisfn;
3701 cu->last_fn = thisfn;
3704 /* qsort helper for inherit_abstract_dies. */
3707 unsigned_int_compar (const void *ap, const void *bp)
3709 unsigned int a = *(unsigned int *) ap;
3710 unsigned int b = *(unsigned int *) bp;
3712 return (a > b) - (b > a);
3715 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3716 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3717 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3720 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
3722 struct die_info *child_die;
3723 unsigned die_children_count;
3724 /* CU offsets which were referenced by children of the current DIE. */
3726 unsigned *offsets_end, *offsetp;
3727 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3728 struct die_info *origin_die;
3729 /* Iterator of the ORIGIN_DIE children. */
3730 struct die_info *origin_child_die;
3731 struct cleanup *cleanups;
3732 struct attribute *attr;
3734 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
3738 origin_die = follow_die_ref (die, attr, &cu);
3739 if (die->tag != origin_die->tag
3740 && !(die->tag == DW_TAG_inlined_subroutine
3741 && origin_die->tag == DW_TAG_subprogram))
3742 complaint (&symfile_complaints,
3743 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3744 die->offset, origin_die->offset);
3746 child_die = die->child;
3747 die_children_count = 0;
3748 while (child_die && child_die->tag)
3750 child_die = sibling_die (child_die);
3751 die_children_count++;
3753 offsets = xmalloc (sizeof (*offsets) * die_children_count);
3754 cleanups = make_cleanup (xfree, offsets);
3756 offsets_end = offsets;
3757 child_die = die->child;
3758 while (child_die && child_die->tag)
3760 /* For each CHILD_DIE, find the corresponding child of
3761 ORIGIN_DIE. If there is more than one layer of
3762 DW_AT_abstract_origin, follow them all; there shouldn't be,
3763 but GCC versions at least through 4.4 generate this (GCC PR
3765 struct die_info *child_origin_die = child_die;
3768 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
3771 child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
3774 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3775 counterpart may exist. */
3776 if (child_origin_die != child_die)
3778 if (child_die->tag != child_origin_die->tag
3779 && !(child_die->tag == DW_TAG_inlined_subroutine
3780 && child_origin_die->tag == DW_TAG_subprogram))
3781 complaint (&symfile_complaints,
3782 _("Child DIE 0x%x and its abstract origin 0x%x have "
3783 "different tags"), child_die->offset,
3784 child_origin_die->offset);
3785 if (child_origin_die->parent != origin_die)
3786 complaint (&symfile_complaints,
3787 _("Child DIE 0x%x and its abstract origin 0x%x have "
3788 "different parents"), child_die->offset,
3789 child_origin_die->offset);
3791 *offsets_end++ = child_origin_die->offset;
3793 child_die = sibling_die (child_die);
3795 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
3796 unsigned_int_compar);
3797 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
3798 if (offsetp[-1] == *offsetp)
3799 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
3800 "to DIE 0x%x as their abstract origin"),
3801 die->offset, *offsetp);
3804 origin_child_die = origin_die->child;
3805 while (origin_child_die && origin_child_die->tag)
3807 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3808 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
3810 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
3812 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3813 process_die (origin_child_die, cu);
3815 origin_child_die = sibling_die (origin_child_die);
3818 do_cleanups (cleanups);
3822 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
3824 struct objfile *objfile = cu->objfile;
3825 struct context_stack *new;
3828 struct die_info *child_die;
3829 struct attribute *attr, *call_line, *call_file;
3832 struct block *block;
3833 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
3837 /* If we do not have call site information, we can't show the
3838 caller of this inlined function. That's too confusing, so
3839 only use the scope for local variables. */
3840 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
3841 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
3842 if (call_line == NULL || call_file == NULL)
3844 read_lexical_block_scope (die, cu);
3849 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3851 name = dwarf2_linkage_name (die, cu);
3853 /* Ignore functions with missing or empty names and functions with
3854 missing or invalid low and high pc attributes. */
3855 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3861 /* Record the function range for dwarf_decode_lines. */
3862 add_to_cu_func_list (name, lowpc, highpc, cu);
3864 new = push_context (0, lowpc);
3865 new->name = new_symbol (die, read_type_die (die, cu), cu);
3867 /* If there is a location expression for DW_AT_frame_base, record
3869 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
3871 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3872 expression is being recorded directly in the function's symbol
3873 and not in a separate frame-base object. I guess this hack is
3874 to avoid adding some sort of frame-base adjunct/annex to the
3875 function's symbol :-(. The problem with doing this is that it
3876 results in a function symbol with a location expression that
3877 has nothing to do with the location of the function, ouch! The
3878 relationship should be: a function's symbol has-a frame base; a
3879 frame-base has-a location expression. */
3880 dwarf2_symbol_mark_computed (attr, new->name, cu);
3882 cu->list_in_scope = &local_symbols;
3884 if (die->child != NULL)
3886 child_die = die->child;
3887 while (child_die && child_die->tag)
3889 process_die (child_die, cu);
3890 child_die = sibling_die (child_die);
3894 inherit_abstract_dies (die, cu);
3896 new = pop_context ();
3897 /* Make a block for the local symbols within. */
3898 block = finish_block (new->name, &local_symbols, new->old_blocks,
3899 lowpc, highpc, objfile);
3901 /* For C++, set the block's scope. */
3902 if (cu->language == language_cplus)
3903 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
3904 determine_prefix (die, cu),
3905 processing_has_namespace_info);
3907 /* If we have address ranges, record them. */
3908 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3910 /* In C++, we can have functions nested inside functions (e.g., when
3911 a function declares a class that has methods). This means that
3912 when we finish processing a function scope, we may need to go
3913 back to building a containing block's symbol lists. */
3914 local_symbols = new->locals;
3915 param_symbols = new->params;
3916 using_directives = new->using_directives;
3918 /* If we've finished processing a top-level function, subsequent
3919 symbols go in the file symbol list. */
3920 if (outermost_context_p ())
3921 cu->list_in_scope = &file_symbols;
3924 /* Process all the DIES contained within a lexical block scope. Start
3925 a new scope, process the dies, and then close the scope. */
3928 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
3930 struct objfile *objfile = cu->objfile;
3931 struct context_stack *new;
3932 CORE_ADDR lowpc, highpc;
3933 struct die_info *child_die;
3936 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3938 /* Ignore blocks with missing or invalid low and high pc attributes. */
3939 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3940 as multiple lexical blocks? Handling children in a sane way would
3941 be nasty. Might be easier to properly extend generic blocks to
3943 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3948 push_context (0, lowpc);
3949 if (die->child != NULL)
3951 child_die = die->child;
3952 while (child_die && child_die->tag)
3954 process_die (child_die, cu);
3955 child_die = sibling_die (child_die);
3958 new = pop_context ();
3960 if (local_symbols != NULL)
3963 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
3966 /* Note that recording ranges after traversing children, as we
3967 do here, means that recording a parent's ranges entails
3968 walking across all its children's ranges as they appear in
3969 the address map, which is quadratic behavior.
3971 It would be nicer to record the parent's ranges before
3972 traversing its children, simply overriding whatever you find
3973 there. But since we don't even decide whether to create a
3974 block until after we've traversed its children, that's hard
3976 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3978 local_symbols = new->locals;
3979 using_directives = new->using_directives;
3982 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3983 Return 1 if the attributes are present and valid, otherwise, return 0.
3984 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3987 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
3988 CORE_ADDR *high_return, struct dwarf2_cu *cu,
3989 struct partial_symtab *ranges_pst)
3991 struct objfile *objfile = cu->objfile;
3992 struct comp_unit_head *cu_header = &cu->header;
3993 bfd *obfd = objfile->obfd;
3994 unsigned int addr_size = cu_header->addr_size;
3995 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3996 /* Base address selection entry. */
4007 found_base = cu->base_known;
4008 base = cu->base_address;
4010 if (offset >= dwarf2_per_objfile->ranges.size)
4012 complaint (&symfile_complaints,
4013 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4017 buffer = dwarf2_per_objfile->ranges.buffer + offset;
4019 /* Read in the largest possible address. */
4020 marker = read_address (obfd, buffer, cu, &dummy);
4021 if ((marker & mask) == mask)
4023 /* If we found the largest possible address, then
4024 read the base address. */
4025 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4026 buffer += 2 * addr_size;
4027 offset += 2 * addr_size;
4033 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4037 CORE_ADDR range_beginning, range_end;
4039 range_beginning = read_address (obfd, buffer, cu, &dummy);
4040 buffer += addr_size;
4041 range_end = read_address (obfd, buffer, cu, &dummy);
4042 buffer += addr_size;
4043 offset += 2 * addr_size;
4045 /* An end of list marker is a pair of zero addresses. */
4046 if (range_beginning == 0 && range_end == 0)
4047 /* Found the end of list entry. */
4050 /* Each base address selection entry is a pair of 2 values.
4051 The first is the largest possible address, the second is
4052 the base address. Check for a base address here. */
4053 if ((range_beginning & mask) == mask)
4055 /* If we found the largest possible address, then
4056 read the base address. */
4057 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4064 /* We have no valid base address for the ranges
4066 complaint (&symfile_complaints,
4067 _("Invalid .debug_ranges data (no base address)"));
4071 range_beginning += base;
4074 if (ranges_pst != NULL && range_beginning < range_end)
4075 addrmap_set_empty (objfile->psymtabs_addrmap,
4076 range_beginning + baseaddr, range_end - 1 + baseaddr,
4079 /* FIXME: This is recording everything as a low-high
4080 segment of consecutive addresses. We should have a
4081 data structure for discontiguous block ranges
4085 low = range_beginning;
4091 if (range_beginning < low)
4092 low = range_beginning;
4093 if (range_end > high)
4099 /* If the first entry is an end-of-list marker, the range
4100 describes an empty scope, i.e. no instructions. */
4106 *high_return = high;
4110 /* Get low and high pc attributes from a die. Return 1 if the attributes
4111 are present and valid, otherwise, return 0. Return -1 if the range is
4112 discontinuous, i.e. derived from DW_AT_ranges information. */
4114 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
4115 CORE_ADDR *highpc, struct dwarf2_cu *cu,
4116 struct partial_symtab *pst)
4118 struct attribute *attr;
4123 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4126 high = DW_ADDR (attr);
4127 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4129 low = DW_ADDR (attr);
4131 /* Found high w/o low attribute. */
4134 /* Found consecutive range of addresses. */
4139 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4142 /* Value of the DW_AT_ranges attribute is the offset in the
4143 .debug_ranges section. */
4144 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
4146 /* Found discontinuous range of addresses. */
4154 /* When using the GNU linker, .gnu.linkonce. sections are used to
4155 eliminate duplicate copies of functions and vtables and such.
4156 The linker will arbitrarily choose one and discard the others.
4157 The AT_*_pc values for such functions refer to local labels in
4158 these sections. If the section from that file was discarded, the
4159 labels are not in the output, so the relocs get a value of 0.
4160 If this is a discarded function, mark the pc bounds as invalid,
4161 so that GDB will ignore it. */
4162 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
4170 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4171 its low and high PC addresses. Do nothing if these addresses could not
4172 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4173 and HIGHPC to the high address if greater than HIGHPC. */
4176 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
4177 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4178 struct dwarf2_cu *cu)
4180 CORE_ADDR low, high;
4181 struct die_info *child = die->child;
4183 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
4185 *lowpc = min (*lowpc, low);
4186 *highpc = max (*highpc, high);
4189 /* If the language does not allow nested subprograms (either inside
4190 subprograms or lexical blocks), we're done. */
4191 if (cu->language != language_ada)
4194 /* Check all the children of the given DIE. If it contains nested
4195 subprograms, then check their pc bounds. Likewise, we need to
4196 check lexical blocks as well, as they may also contain subprogram
4198 while (child && child->tag)
4200 if (child->tag == DW_TAG_subprogram
4201 || child->tag == DW_TAG_lexical_block)
4202 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
4203 child = sibling_die (child);
4207 /* Get the low and high pc's represented by the scope DIE, and store
4208 them in *LOWPC and *HIGHPC. If the correct values can't be
4209 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4212 get_scope_pc_bounds (struct die_info *die,
4213 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4214 struct dwarf2_cu *cu)
4216 CORE_ADDR best_low = (CORE_ADDR) -1;
4217 CORE_ADDR best_high = (CORE_ADDR) 0;
4218 CORE_ADDR current_low, current_high;
4220 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
4222 best_low = current_low;
4223 best_high = current_high;
4227 struct die_info *child = die->child;
4229 while (child && child->tag)
4231 switch (child->tag) {
4232 case DW_TAG_subprogram:
4233 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
4235 case DW_TAG_namespace:
4236 /* FIXME: carlton/2004-01-16: Should we do this for
4237 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4238 that current GCC's always emit the DIEs corresponding
4239 to definitions of methods of classes as children of a
4240 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4241 the DIEs giving the declarations, which could be
4242 anywhere). But I don't see any reason why the
4243 standards says that they have to be there. */
4244 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
4246 if (current_low != ((CORE_ADDR) -1))
4248 best_low = min (best_low, current_low);
4249 best_high = max (best_high, current_high);
4257 child = sibling_die (child);
4262 *highpc = best_high;
4265 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4268 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
4269 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
4271 struct attribute *attr;
4273 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4276 CORE_ADDR high = DW_ADDR (attr);
4277 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4280 CORE_ADDR low = DW_ADDR (attr);
4281 record_block_range (block, baseaddr + low, baseaddr + high - 1);
4285 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4288 bfd *obfd = cu->objfile->obfd;
4290 /* The value of the DW_AT_ranges attribute is the offset of the
4291 address range list in the .debug_ranges section. */
4292 unsigned long offset = DW_UNSND (attr);
4293 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
4295 /* For some target architectures, but not others, the
4296 read_address function sign-extends the addresses it returns.
4297 To recognize base address selection entries, we need a
4299 unsigned int addr_size = cu->header.addr_size;
4300 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4302 /* The base address, to which the next pair is relative. Note
4303 that this 'base' is a DWARF concept: most entries in a range
4304 list are relative, to reduce the number of relocs against the
4305 debugging information. This is separate from this function's
4306 'baseaddr' argument, which GDB uses to relocate debugging
4307 information from a shared library based on the address at
4308 which the library was loaded. */
4309 CORE_ADDR base = cu->base_address;
4310 int base_known = cu->base_known;
4312 if (offset >= dwarf2_per_objfile->ranges.size)
4314 complaint (&symfile_complaints,
4315 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4322 unsigned int bytes_read;
4323 CORE_ADDR start, end;
4325 start = read_address (obfd, buffer, cu, &bytes_read);
4326 buffer += bytes_read;
4327 end = read_address (obfd, buffer, cu, &bytes_read);
4328 buffer += bytes_read;
4330 /* Did we find the end of the range list? */
4331 if (start == 0 && end == 0)
4334 /* Did we find a base address selection entry? */
4335 else if ((start & base_select_mask) == base_select_mask)
4341 /* We found an ordinary address range. */
4346 complaint (&symfile_complaints,
4347 _("Invalid .debug_ranges data (no base address)"));
4351 record_block_range (block,
4352 baseaddr + base + start,
4353 baseaddr + base + end - 1);
4359 /* Add an aggregate field to the field list. */
4362 dwarf2_add_field (struct field_info *fip, struct die_info *die,
4363 struct dwarf2_cu *cu)
4365 struct objfile *objfile = cu->objfile;
4366 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4367 struct nextfield *new_field;
4368 struct attribute *attr;
4370 char *fieldname = "";
4372 /* Allocate a new field list entry and link it in. */
4373 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4374 make_cleanup (xfree, new_field);
4375 memset (new_field, 0, sizeof (struct nextfield));
4377 if (die->tag == DW_TAG_inheritance)
4379 new_field->next = fip->baseclasses;
4380 fip->baseclasses = new_field;
4384 new_field->next = fip->fields;
4385 fip->fields = new_field;
4389 /* Handle accessibility and virtuality of field.
4390 The default accessibility for members is public, the default
4391 accessibility for inheritance is private. */
4392 if (die->tag != DW_TAG_inheritance)
4393 new_field->accessibility = DW_ACCESS_public;
4395 new_field->accessibility = DW_ACCESS_private;
4396 new_field->virtuality = DW_VIRTUALITY_none;
4398 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4400 new_field->accessibility = DW_UNSND (attr);
4401 if (new_field->accessibility != DW_ACCESS_public)
4402 fip->non_public_fields = 1;
4403 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4405 new_field->virtuality = DW_UNSND (attr);
4407 fp = &new_field->field;
4409 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
4411 /* Data member other than a C++ static data member. */
4413 /* Get type of field. */
4414 fp->type = die_type (die, cu);
4416 SET_FIELD_BITPOS (*fp, 0);
4418 /* Get bit size of field (zero if none). */
4419 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
4422 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
4426 FIELD_BITSIZE (*fp) = 0;
4429 /* Get bit offset of field. */
4430 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4433 int byte_offset = 0;
4435 if (attr_form_is_section_offset (attr))
4436 dwarf2_complex_location_expr_complaint ();
4437 else if (attr_form_is_constant (attr))
4438 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4439 else if (attr_form_is_block (attr))
4440 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4442 dwarf2_complex_location_expr_complaint ();
4444 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4446 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
4449 if (gdbarch_bits_big_endian (gdbarch))
4451 /* For big endian bits, the DW_AT_bit_offset gives the
4452 additional bit offset from the MSB of the containing
4453 anonymous object to the MSB of the field. We don't
4454 have to do anything special since we don't need to
4455 know the size of the anonymous object. */
4456 FIELD_BITPOS (*fp) += DW_UNSND (attr);
4460 /* For little endian bits, compute the bit offset to the
4461 MSB of the anonymous object, subtract off the number of
4462 bits from the MSB of the field to the MSB of the
4463 object, and then subtract off the number of bits of
4464 the field itself. The result is the bit offset of
4465 the LSB of the field. */
4467 int bit_offset = DW_UNSND (attr);
4469 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4472 /* The size of the anonymous object containing
4473 the bit field is explicit, so use the
4474 indicated size (in bytes). */
4475 anonymous_size = DW_UNSND (attr);
4479 /* The size of the anonymous object containing
4480 the bit field must be inferred from the type
4481 attribute of the data member containing the
4483 anonymous_size = TYPE_LENGTH (fp->type);
4485 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
4486 - bit_offset - FIELD_BITSIZE (*fp);
4490 /* Get name of field. */
4491 fieldname = dwarf2_name (die, cu);
4492 if (fieldname == NULL)
4495 /* The name is already allocated along with this objfile, so we don't
4496 need to duplicate it for the type. */
4497 fp->name = fieldname;
4499 /* Change accessibility for artificial fields (e.g. virtual table
4500 pointer or virtual base class pointer) to private. */
4501 if (dwarf2_attr (die, DW_AT_artificial, cu))
4503 FIELD_ARTIFICIAL (*fp) = 1;
4504 new_field->accessibility = DW_ACCESS_private;
4505 fip->non_public_fields = 1;
4508 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
4510 /* C++ static member. */
4512 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4513 is a declaration, but all versions of G++ as of this writing
4514 (so through at least 3.2.1) incorrectly generate
4515 DW_TAG_variable tags. */
4519 /* Get name of field. */
4520 fieldname = dwarf2_name (die, cu);
4521 if (fieldname == NULL)
4524 /* Get physical name. */
4525 physname = dwarf2_linkage_name (die, cu);
4527 /* The name is already allocated along with this objfile, so we don't
4528 need to duplicate it for the type. */
4529 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
4530 FIELD_TYPE (*fp) = die_type (die, cu);
4531 FIELD_NAME (*fp) = fieldname;
4533 else if (die->tag == DW_TAG_inheritance)
4535 /* C++ base class field. */
4536 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4539 int byte_offset = 0;
4541 if (attr_form_is_section_offset (attr))
4542 dwarf2_complex_location_expr_complaint ();
4543 else if (attr_form_is_constant (attr))
4544 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4545 else if (attr_form_is_block (attr))
4546 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4548 dwarf2_complex_location_expr_complaint ();
4550 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4552 FIELD_BITSIZE (*fp) = 0;
4553 FIELD_TYPE (*fp) = die_type (die, cu);
4554 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
4555 fip->nbaseclasses++;
4559 /* Create the vector of fields, and attach it to the type. */
4562 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
4563 struct dwarf2_cu *cu)
4565 int nfields = fip->nfields;
4567 /* Record the field count, allocate space for the array of fields,
4568 and create blank accessibility bitfields if necessary. */
4569 TYPE_NFIELDS (type) = nfields;
4570 TYPE_FIELDS (type) = (struct field *)
4571 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4572 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4574 if (fip->non_public_fields && cu->language != language_ada)
4576 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4578 TYPE_FIELD_PRIVATE_BITS (type) =
4579 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4580 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4582 TYPE_FIELD_PROTECTED_BITS (type) =
4583 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4584 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4586 TYPE_FIELD_IGNORE_BITS (type) =
4587 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4588 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4591 /* If the type has baseclasses, allocate and clear a bit vector for
4592 TYPE_FIELD_VIRTUAL_BITS. */
4593 if (fip->nbaseclasses && cu->language != language_ada)
4595 int num_bytes = B_BYTES (fip->nbaseclasses);
4596 unsigned char *pointer;
4598 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4599 pointer = TYPE_ALLOC (type, num_bytes);
4600 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
4601 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
4602 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
4605 /* Copy the saved-up fields into the field vector. Start from the head
4606 of the list, adding to the tail of the field array, so that they end
4607 up in the same order in the array in which they were added to the list. */
4608 while (nfields-- > 0)
4610 struct nextfield *fieldp;
4614 fieldp = fip->fields;
4615 fip->fields = fieldp->next;
4619 fieldp = fip->baseclasses;
4620 fip->baseclasses = fieldp->next;
4623 TYPE_FIELD (type, nfields) = fieldp->field;
4624 switch (fieldp->accessibility)
4626 case DW_ACCESS_private:
4627 if (cu->language != language_ada)
4628 SET_TYPE_FIELD_PRIVATE (type, nfields);
4631 case DW_ACCESS_protected:
4632 if (cu->language != language_ada)
4633 SET_TYPE_FIELD_PROTECTED (type, nfields);
4636 case DW_ACCESS_public:
4640 /* Unknown accessibility. Complain and treat it as public. */
4642 complaint (&symfile_complaints, _("unsupported accessibility %d"),
4643 fieldp->accessibility);
4647 if (nfields < fip->nbaseclasses)
4649 switch (fieldp->virtuality)
4651 case DW_VIRTUALITY_virtual:
4652 case DW_VIRTUALITY_pure_virtual:
4653 if (cu->language == language_ada)
4654 error ("unexpected virtuality in component of Ada type");
4655 SET_TYPE_FIELD_VIRTUAL (type, nfields);
4662 /* Add a member function to the proper fieldlist. */
4665 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
4666 struct type *type, struct dwarf2_cu *cu)
4668 struct objfile *objfile = cu->objfile;
4669 struct attribute *attr;
4670 struct fnfieldlist *flp;
4672 struct fn_field *fnp;
4675 struct nextfnfield *new_fnfield;
4676 struct type *this_type;
4678 if (cu->language == language_ada)
4679 error ("unexpected member function in Ada type");
4681 /* Get name of member function. */
4682 fieldname = dwarf2_name (die, cu);
4683 if (fieldname == NULL)
4686 /* Get the mangled name. */
4687 physname = dwarf2_linkage_name (die, cu);
4689 /* Look up member function name in fieldlist. */
4690 for (i = 0; i < fip->nfnfields; i++)
4692 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
4696 /* Create new list element if necessary. */
4697 if (i < fip->nfnfields)
4698 flp = &fip->fnfieldlists[i];
4701 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
4703 fip->fnfieldlists = (struct fnfieldlist *)
4704 xrealloc (fip->fnfieldlists,
4705 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
4706 * sizeof (struct fnfieldlist));
4707 if (fip->nfnfields == 0)
4708 make_cleanup (free_current_contents, &fip->fnfieldlists);
4710 flp = &fip->fnfieldlists[fip->nfnfields];
4711 flp->name = fieldname;
4717 /* Create a new member function field and chain it to the field list
4719 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
4720 make_cleanup (xfree, new_fnfield);
4721 memset (new_fnfield, 0, sizeof (struct nextfnfield));
4722 new_fnfield->next = flp->head;
4723 flp->head = new_fnfield;
4726 /* Fill in the member function field info. */
4727 fnp = &new_fnfield->fnfield;
4728 /* The name is already allocated along with this objfile, so we don't
4729 need to duplicate it for the type. */
4730 fnp->physname = physname ? physname : "";
4731 fnp->type = alloc_type (objfile);
4732 this_type = read_type_die (die, cu);
4733 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
4735 int nparams = TYPE_NFIELDS (this_type);
4737 /* TYPE is the domain of this method, and THIS_TYPE is the type
4738 of the method itself (TYPE_CODE_METHOD). */
4739 smash_to_method_type (fnp->type, type,
4740 TYPE_TARGET_TYPE (this_type),
4741 TYPE_FIELDS (this_type),
4742 TYPE_NFIELDS (this_type),
4743 TYPE_VARARGS (this_type));
4745 /* Handle static member functions.
4746 Dwarf2 has no clean way to discern C++ static and non-static
4747 member functions. G++ helps GDB by marking the first
4748 parameter for non-static member functions (which is the
4749 this pointer) as artificial. We obtain this information
4750 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4751 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
4752 fnp->voffset = VOFFSET_STATIC;
4755 complaint (&symfile_complaints, _("member function type missing for '%s'"),
4758 /* Get fcontext from DW_AT_containing_type if present. */
4759 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4760 fnp->fcontext = die_containing_type (die, cu);
4762 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4763 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4765 /* Get accessibility. */
4766 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4769 switch (DW_UNSND (attr))
4771 case DW_ACCESS_private:
4772 fnp->is_private = 1;
4774 case DW_ACCESS_protected:
4775 fnp->is_protected = 1;
4780 /* Check for artificial methods. */
4781 attr = dwarf2_attr (die, DW_AT_artificial, cu);
4782 if (attr && DW_UNSND (attr) != 0)
4783 fnp->is_artificial = 1;
4785 /* Get index in virtual function table if it is a virtual member
4786 function. For GCC, this is an offset in the appropriate
4787 virtual table, as specified by DW_AT_containing_type. For
4788 everyone else, it is an expression to be evaluated relative
4789 to the object address. */
4791 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
4792 if (attr && fnp->fcontext)
4794 /* Support the .debug_loc offsets */
4795 if (attr_form_is_block (attr))
4797 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
4799 else if (attr_form_is_section_offset (attr))
4801 dwarf2_complex_location_expr_complaint ();
4805 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4811 /* We only support trivial expressions here. This hack will work
4812 for v3 classes, which always start with the vtable pointer. */
4813 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0
4814 && DW_BLOCK (attr)->data[0] == DW_OP_deref)
4816 struct dwarf_block blk;
4817 blk.size = DW_BLOCK (attr)->size - 1;
4818 blk.data = DW_BLOCK (attr)->data + 1;
4819 fnp->voffset = decode_locdesc (&blk, cu);
4820 if ((fnp->voffset % cu->header.addr_size) != 0)
4821 dwarf2_complex_location_expr_complaint ();
4823 fnp->voffset /= cu->header.addr_size;
4825 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
4828 dwarf2_complex_location_expr_complaint ();
4832 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4833 if (attr && DW_UNSND (attr))
4835 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4836 complaint (&symfile_complaints,
4837 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4838 fieldname, die->offset);
4839 TYPE_CPLUS_DYNAMIC (type) = 1;
4844 /* Create the vector of member function fields, and attach it to the type. */
4847 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
4848 struct dwarf2_cu *cu)
4850 struct fnfieldlist *flp;
4851 int total_length = 0;
4854 if (cu->language == language_ada)
4855 error ("unexpected member functions in Ada type");
4857 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4858 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
4859 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
4861 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
4863 struct nextfnfield *nfp = flp->head;
4864 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
4867 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
4868 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
4869 fn_flp->fn_fields = (struct fn_field *)
4870 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
4871 for (k = flp->length; (k--, nfp); nfp = nfp->next)
4872 fn_flp->fn_fields[k] = nfp->fnfield;
4874 total_length += flp->length;
4877 TYPE_NFN_FIELDS (type) = fip->nfnfields;
4878 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
4881 /* Returns non-zero if NAME is the name of a vtable member in CU's
4882 language, zero otherwise. */
4884 is_vtable_name (const char *name, struct dwarf2_cu *cu)
4886 static const char vptr[] = "_vptr";
4887 static const char vtable[] = "vtable";
4889 /* Look for the C++ and Java forms of the vtable. */
4890 if ((cu->language == language_java
4891 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
4892 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
4893 && is_cplus_marker (name[sizeof (vptr) - 1])))
4899 /* GCC outputs unnamed structures that are really pointers to member
4900 functions, with the ABI-specified layout. If DIE (from CU) describes
4901 such a structure, set its type, and return nonzero. Otherwise return
4904 GCC shouldn't do this; it should just output pointer to member DIEs.
4905 This is GCC PR debug/28767. */
4907 static struct type *
4908 quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
4910 struct objfile *objfile = cu->objfile;
4912 struct die_info *pfn_die, *delta_die;
4913 struct attribute *pfn_name, *delta_name;
4914 struct type *pfn_type, *domain_type;
4916 /* Check for a structure with no name and two children. */
4917 if (die->tag != DW_TAG_structure_type
4918 || dwarf2_attr (die, DW_AT_name, cu) != NULL
4919 || die->child == NULL
4920 || die->child->sibling == NULL
4921 || (die->child->sibling->sibling != NULL
4922 && die->child->sibling->sibling->tag != DW_TAG_padding))
4925 /* Check for __pfn and __delta members. */
4926 pfn_die = die->child;
4927 pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
4928 if (pfn_die->tag != DW_TAG_member
4930 || DW_STRING (pfn_name) == NULL
4931 || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
4934 delta_die = pfn_die->sibling;
4935 delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
4936 if (delta_die->tag != DW_TAG_member
4937 || delta_name == NULL
4938 || DW_STRING (delta_name) == NULL
4939 || strcmp ("__delta", DW_STRING (delta_name)) != 0)
4942 /* Find the type of the method. */
4943 pfn_type = die_type (pfn_die, cu);
4944 if (pfn_type == NULL
4945 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
4946 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
4949 /* Look for the "this" argument. */
4950 pfn_type = TYPE_TARGET_TYPE (pfn_type);
4951 if (TYPE_NFIELDS (pfn_type) == 0
4952 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
4955 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
4956 type = alloc_type (objfile);
4957 smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
4958 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
4959 TYPE_VARARGS (pfn_type));
4960 type = lookup_methodptr_type (type);
4961 return set_die_type (die, type, cu);
4964 /* Called when we find the DIE that starts a structure or union scope
4965 (definition) to process all dies that define the members of the
4968 NOTE: we need to call struct_type regardless of whether or not the
4969 DIE has an at_name attribute, since it might be an anonymous
4970 structure or union. This gets the type entered into our set of
4973 However, if the structure is incomplete (an opaque struct/union)
4974 then suppress creating a symbol table entry for it since gdb only
4975 wants to find the one with the complete definition. Note that if
4976 it is complete, we just call new_symbol, which does it's own
4977 checking about whether the struct/union is anonymous or not (and
4978 suppresses creating a symbol table entry itself). */
4980 static struct type *
4981 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
4983 struct objfile *objfile = cu->objfile;
4985 struct attribute *attr;
4987 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4989 type = quirk_gcc_member_function_pointer (die, cu);
4993 /* If the definition of this type lives in .debug_types, read that type.
4994 Don't follow DW_AT_specification though, that will take us back up
4995 the chain and we want to go down. */
4996 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
4999 struct dwarf2_cu *type_cu = cu;
5000 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5001 /* We could just recurse on read_structure_type, but we need to call
5002 get_die_type to ensure only one type for this DIE is created.
5003 This is important, for example, because for c++ classes we need
5004 TYPE_NAME set which is only done by new_symbol. Blech. */
5005 type = read_type_die (type_die, type_cu);
5006 return set_die_type (die, type, cu);
5009 type = alloc_type (objfile);
5010 INIT_CPLUS_SPECIFIC (type);
5012 name = dwarf2_name (die, cu);
5015 if (cu->language == language_cplus
5016 || cu->language == language_java)
5018 const char *new_prefix = determine_class_name (die, cu);
5019 TYPE_TAG_NAME (type) = (char *) new_prefix;
5023 /* The name is already allocated along with this objfile, so
5024 we don't need to duplicate it for the type. */
5025 TYPE_TAG_NAME (type) = name;
5029 if (die->tag == DW_TAG_structure_type)
5031 TYPE_CODE (type) = TYPE_CODE_STRUCT;
5033 else if (die->tag == DW_TAG_union_type)
5035 TYPE_CODE (type) = TYPE_CODE_UNION;
5039 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5041 TYPE_CODE (type) = TYPE_CODE_CLASS;
5044 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5047 TYPE_LENGTH (type) = DW_UNSND (attr);
5051 TYPE_LENGTH (type) = 0;
5054 TYPE_STUB_SUPPORTED (type) = 1;
5055 if (die_is_declaration (die, cu))
5056 TYPE_STUB (type) = 1;
5058 set_descriptive_type (type, die, cu);
5060 /* We need to add the type field to the die immediately so we don't
5061 infinitely recurse when dealing with pointers to the structure
5062 type within the structure itself. */
5063 set_die_type (die, type, cu);
5065 if (die->child != NULL && ! die_is_declaration (die, cu))
5067 struct field_info fi;
5068 struct die_info *child_die;
5070 memset (&fi, 0, sizeof (struct field_info));
5072 child_die = die->child;
5074 while (child_die && child_die->tag)
5076 if (child_die->tag == DW_TAG_member
5077 || child_die->tag == DW_TAG_variable)
5079 /* NOTE: carlton/2002-11-05: A C++ static data member
5080 should be a DW_TAG_member that is a declaration, but
5081 all versions of G++ as of this writing (so through at
5082 least 3.2.1) incorrectly generate DW_TAG_variable
5083 tags for them instead. */
5084 dwarf2_add_field (&fi, child_die, cu);
5086 else if (child_die->tag == DW_TAG_subprogram)
5088 /* C++ member function. */
5089 dwarf2_add_member_fn (&fi, child_die, type, cu);
5091 else if (child_die->tag == DW_TAG_inheritance)
5093 /* C++ base class field. */
5094 dwarf2_add_field (&fi, child_die, cu);
5096 child_die = sibling_die (child_die);
5099 /* Attach fields and member functions to the type. */
5101 dwarf2_attach_fields_to_type (&fi, type, cu);
5104 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
5106 /* Get the type which refers to the base class (possibly this
5107 class itself) which contains the vtable pointer for the current
5108 class from the DW_AT_containing_type attribute. This use of
5109 DW_AT_containing_type is a GNU extension. */
5111 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
5113 struct type *t = die_containing_type (die, cu);
5115 TYPE_VPTR_BASETYPE (type) = t;
5120 /* Our own class provides vtbl ptr. */
5121 for (i = TYPE_NFIELDS (t) - 1;
5122 i >= TYPE_N_BASECLASSES (t);
5125 char *fieldname = TYPE_FIELD_NAME (t, i);
5127 if (is_vtable_name (fieldname, cu))
5129 TYPE_VPTR_FIELDNO (type) = i;
5134 /* Complain if virtual function table field not found. */
5135 if (i < TYPE_N_BASECLASSES (t))
5136 complaint (&symfile_complaints,
5137 _("virtual function table pointer not found when defining class '%s'"),
5138 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
5143 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
5146 else if (cu->producer
5147 && strncmp (cu->producer,
5148 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5150 /* The IBM XLC compiler does not provide direct indication
5151 of the containing type, but the vtable pointer is
5152 always named __vfp. */
5156 for (i = TYPE_NFIELDS (type) - 1;
5157 i >= TYPE_N_BASECLASSES (type);
5160 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
5162 TYPE_VPTR_FIELDNO (type) = i;
5163 TYPE_VPTR_BASETYPE (type) = type;
5171 do_cleanups (back_to);
5176 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
5178 struct objfile *objfile = cu->objfile;
5179 struct die_info *child_die = die->child;
5180 struct type *this_type;
5182 this_type = get_die_type (die, cu);
5183 if (this_type == NULL)
5184 this_type = read_structure_type (die, cu);
5186 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5187 snapshots) has been known to create a die giving a declaration
5188 for a class that has, as a child, a die giving a definition for a
5189 nested class. So we have to process our children even if the
5190 current die is a declaration. Normally, of course, a declaration
5191 won't have any children at all. */
5193 while (child_die != NULL && child_die->tag)
5195 if (child_die->tag == DW_TAG_member
5196 || child_die->tag == DW_TAG_variable
5197 || child_die->tag == DW_TAG_inheritance)
5202 process_die (child_die, cu);
5204 child_die = sibling_die (child_die);
5207 /* Do not consider external references. According to the DWARF standard,
5208 these DIEs are identified by the fact that they have no byte_size
5209 attribute, and a declaration attribute. */
5210 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
5211 || !die_is_declaration (die, cu))
5212 new_symbol (die, this_type, cu);
5215 /* Given a DW_AT_enumeration_type die, set its type. We do not
5216 complete the type's fields yet, or create any symbols. */
5218 static struct type *
5219 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
5221 struct objfile *objfile = cu->objfile;
5223 struct attribute *attr;
5226 /* If the definition of this type lives in .debug_types, read that type.
5227 Don't follow DW_AT_specification though, that will take us back up
5228 the chain and we want to go down. */
5229 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5232 struct dwarf2_cu *type_cu = cu;
5233 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5234 type = read_type_die (type_die, type_cu);
5235 return set_die_type (die, type, cu);
5238 type = alloc_type (objfile);
5240 TYPE_CODE (type) = TYPE_CODE_ENUM;
5241 name = dwarf2_full_name (die, cu);
5243 TYPE_TAG_NAME (type) = (char *) name;
5245 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5248 TYPE_LENGTH (type) = DW_UNSND (attr);
5252 TYPE_LENGTH (type) = 0;
5255 /* The enumeration DIE can be incomplete. In Ada, any type can be
5256 declared as private in the package spec, and then defined only
5257 inside the package body. Such types are known as Taft Amendment
5258 Types. When another package uses such a type, an incomplete DIE
5259 may be generated by the compiler. */
5260 if (die_is_declaration (die, cu))
5261 TYPE_STUB (type) = 1;
5263 return set_die_type (die, type, cu);
5266 /* Determine the name of the type represented by DIE, which should be
5267 a named C++ or Java compound type. Return the name in question,
5268 allocated on the objfile obstack. */
5271 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
5273 const char *new_prefix = NULL;
5275 /* If we don't have namespace debug info, guess the name by trying
5276 to demangle the names of members, just like we did in
5277 guess_structure_name. */
5278 if (!processing_has_namespace_info)
5280 struct die_info *child;
5282 for (child = die->child;
5283 child != NULL && child->tag != 0;
5284 child = sibling_die (child))
5286 if (child->tag == DW_TAG_subprogram)
5289 = language_class_name_from_physname (cu->language_defn,
5293 if (phys_prefix != NULL)
5296 = obsavestring (phys_prefix, strlen (phys_prefix),
5297 &cu->objfile->objfile_obstack);
5298 xfree (phys_prefix);
5305 if (new_prefix == NULL)
5306 new_prefix = dwarf2_full_name (die, cu);
5311 /* Given a pointer to a die which begins an enumeration, process all
5312 the dies that define the members of the enumeration, and create the
5313 symbol for the enumeration type.
5315 NOTE: We reverse the order of the element list. */
5318 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
5320 struct objfile *objfile = cu->objfile;
5321 struct die_info *child_die;
5322 struct field *fields;
5325 int unsigned_enum = 1;
5327 struct type *this_type;
5331 this_type = get_die_type (die, cu);
5332 if (this_type == NULL)
5333 this_type = read_enumeration_type (die, cu);
5334 if (die->child != NULL)
5336 child_die = die->child;
5337 while (child_die && child_die->tag)
5339 if (child_die->tag != DW_TAG_enumerator)
5341 process_die (child_die, cu);
5345 name = dwarf2_name (child_die, cu);
5348 sym = new_symbol (child_die, this_type, cu);
5349 if (SYMBOL_VALUE (sym) < 0)
5352 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
5354 fields = (struct field *)
5356 (num_fields + DW_FIELD_ALLOC_CHUNK)
5357 * sizeof (struct field));
5360 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
5361 FIELD_TYPE (fields[num_fields]) = NULL;
5362 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
5363 FIELD_BITSIZE (fields[num_fields]) = 0;
5369 child_die = sibling_die (child_die);
5374 TYPE_NFIELDS (this_type) = num_fields;
5375 TYPE_FIELDS (this_type) = (struct field *)
5376 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
5377 memcpy (TYPE_FIELDS (this_type), fields,
5378 sizeof (struct field) * num_fields);
5382 TYPE_UNSIGNED (this_type) = 1;
5385 new_symbol (die, this_type, cu);
5388 /* Extract all information from a DW_TAG_array_type DIE and put it in
5389 the DIE's type field. For now, this only handles one dimensional
5392 static struct type *
5393 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
5395 struct objfile *objfile = cu->objfile;
5396 struct die_info *child_die;
5397 struct type *type = NULL;
5398 struct type *element_type, *range_type, *index_type;
5399 struct type **range_types = NULL;
5400 struct attribute *attr;
5402 struct cleanup *back_to;
5405 element_type = die_type (die, cu);
5407 /* Irix 6.2 native cc creates array types without children for
5408 arrays with unspecified length. */
5409 if (die->child == NULL)
5411 index_type = objfile_type (objfile)->builtin_int;
5412 range_type = create_range_type (NULL, index_type, 0, -1);
5413 type = create_array_type (NULL, element_type, range_type);
5414 return set_die_type (die, type, cu);
5417 back_to = make_cleanup (null_cleanup, NULL);
5418 child_die = die->child;
5419 while (child_die && child_die->tag)
5421 if (child_die->tag == DW_TAG_subrange_type)
5423 struct type *child_type = read_type_die (child_die, cu);
5424 if (child_type != NULL)
5426 /* The range type was succesfully read. Save it for
5427 the array type creation. */
5428 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
5430 range_types = (struct type **)
5431 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
5432 * sizeof (struct type *));
5434 make_cleanup (free_current_contents, &range_types);
5436 range_types[ndim++] = child_type;
5439 child_die = sibling_die (child_die);
5442 /* Dwarf2 dimensions are output from left to right, create the
5443 necessary array types in backwards order. */
5445 type = element_type;
5447 if (read_array_order (die, cu) == DW_ORD_col_major)
5451 type = create_array_type (NULL, type, range_types[i++]);
5456 type = create_array_type (NULL, type, range_types[ndim]);
5459 /* Understand Dwarf2 support for vector types (like they occur on
5460 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5461 array type. This is not part of the Dwarf2/3 standard yet, but a
5462 custom vendor extension. The main difference between a regular
5463 array and the vector variant is that vectors are passed by value
5465 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
5467 make_vector_type (type);
5469 name = dwarf2_name (die, cu);
5471 TYPE_NAME (type) = name;
5473 set_descriptive_type (type, die, cu);
5475 do_cleanups (back_to);
5477 /* Install the type in the die. */
5478 return set_die_type (die, type, cu);
5481 static enum dwarf_array_dim_ordering
5482 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
5484 struct attribute *attr;
5486 attr = dwarf2_attr (die, DW_AT_ordering, cu);
5488 if (attr) return DW_SND (attr);
5491 GNU F77 is a special case, as at 08/2004 array type info is the
5492 opposite order to the dwarf2 specification, but data is still
5493 laid out as per normal fortran.
5495 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5499 if (cu->language == language_fortran
5500 && cu->producer && strstr (cu->producer, "GNU F77"))
5502 return DW_ORD_row_major;
5505 switch (cu->language_defn->la_array_ordering)
5507 case array_column_major:
5508 return DW_ORD_col_major;
5509 case array_row_major:
5511 return DW_ORD_row_major;
5515 /* Extract all information from a DW_TAG_set_type DIE and put it in
5516 the DIE's type field. */
5518 static struct type *
5519 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
5521 struct type *set_type = create_set_type (NULL, die_type (die, cu));
5523 return set_die_type (die, set_type, cu);
5526 /* First cut: install each common block member as a global variable. */
5529 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
5531 struct die_info *child_die;
5532 struct attribute *attr;
5534 CORE_ADDR base = (CORE_ADDR) 0;
5536 attr = dwarf2_attr (die, DW_AT_location, cu);
5539 /* Support the .debug_loc offsets */
5540 if (attr_form_is_block (attr))
5542 base = decode_locdesc (DW_BLOCK (attr), cu);
5544 else if (attr_form_is_section_offset (attr))
5546 dwarf2_complex_location_expr_complaint ();
5550 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5551 "common block member");
5554 if (die->child != NULL)
5556 child_die = die->child;
5557 while (child_die && child_die->tag)
5559 sym = new_symbol (child_die, NULL, cu);
5560 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
5563 CORE_ADDR byte_offset = 0;
5565 if (attr_form_is_section_offset (attr))
5566 dwarf2_complex_location_expr_complaint ();
5567 else if (attr_form_is_constant (attr))
5568 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
5569 else if (attr_form_is_block (attr))
5570 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
5572 dwarf2_complex_location_expr_complaint ();
5574 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
5575 add_symbol_to_list (sym, &global_symbols);
5577 child_die = sibling_die (child_die);
5582 /* Create a type for a C++ namespace. */
5584 static struct type *
5585 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
5587 struct objfile *objfile = cu->objfile;
5588 const char *previous_prefix, *name;
5592 /* For extensions, reuse the type of the original namespace. */
5593 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
5595 struct die_info *ext_die;
5596 struct dwarf2_cu *ext_cu = cu;
5597 ext_die = dwarf2_extension (die, &ext_cu);
5598 type = read_type_die (ext_die, ext_cu);
5599 return set_die_type (die, type, cu);
5602 name = namespace_name (die, &is_anonymous, cu);
5604 /* Now build the name of the current namespace. */
5606 previous_prefix = determine_prefix (die, cu);
5607 if (previous_prefix[0] != '\0')
5608 name = typename_concat (&objfile->objfile_obstack,
5609 previous_prefix, name, cu);
5611 /* Create the type. */
5612 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
5614 TYPE_NAME (type) = (char *) name;
5615 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5617 set_die_type (die, type, cu);
5622 /* Read a C++ namespace. */
5625 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
5627 struct objfile *objfile = cu->objfile;
5631 /* Add a symbol associated to this if we haven't seen the namespace
5632 before. Also, add a using directive if it's an anonymous
5635 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
5639 type = read_type_die (die, cu);
5640 new_symbol (die, type, cu);
5642 name = namespace_name (die, &is_anonymous, cu);
5645 const char *previous_prefix = determine_prefix (die, cu);
5646 cp_add_using_directive (previous_prefix, TYPE_NAME (type));
5650 if (die->child != NULL)
5652 struct die_info *child_die = die->child;
5654 while (child_die && child_die->tag)
5656 process_die (child_die, cu);
5657 child_die = sibling_die (child_die);
5662 /* Read a Fortran module. */
5665 read_module (struct die_info *die, struct dwarf2_cu *cu)
5667 struct die_info *child_die = die->child;
5669 /* FIXME: Support the separate Fortran module namespaces. */
5671 while (child_die && child_die->tag)
5673 process_die (child_die, cu);
5674 child_die = sibling_die (child_die);
5678 /* Return the name of the namespace represented by DIE. Set
5679 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5683 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
5685 struct die_info *current_die;
5686 const char *name = NULL;
5688 /* Loop through the extensions until we find a name. */
5690 for (current_die = die;
5691 current_die != NULL;
5692 current_die = dwarf2_extension (die, &cu))
5694 name = dwarf2_name (current_die, cu);
5699 /* Is it an anonymous namespace? */
5701 *is_anonymous = (name == NULL);
5703 name = "(anonymous namespace)";
5708 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5709 the user defined type vector. */
5711 static struct type *
5712 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
5714 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
5715 struct comp_unit_head *cu_header = &cu->header;
5717 struct attribute *attr_byte_size;
5718 struct attribute *attr_address_class;
5719 int byte_size, addr_class;
5721 type = lookup_pointer_type (die_type (die, cu));
5723 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
5725 byte_size = DW_UNSND (attr_byte_size);
5727 byte_size = cu_header->addr_size;
5729 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
5730 if (attr_address_class)
5731 addr_class = DW_UNSND (attr_address_class);
5733 addr_class = DW_ADDR_none;
5735 /* If the pointer size or address class is different than the
5736 default, create a type variant marked as such and set the
5737 length accordingly. */
5738 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
5740 if (gdbarch_address_class_type_flags_p (gdbarch))
5744 type_flags = gdbarch_address_class_type_flags
5745 (gdbarch, byte_size, addr_class);
5746 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
5748 type = make_type_with_address_space (type, type_flags);
5750 else if (TYPE_LENGTH (type) != byte_size)
5752 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
5755 /* Should we also complain about unhandled address classes? */
5759 TYPE_LENGTH (type) = byte_size;
5760 return set_die_type (die, type, cu);
5763 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5764 the user defined type vector. */
5766 static struct type *
5767 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
5769 struct objfile *objfile = cu->objfile;
5771 struct type *to_type;
5772 struct type *domain;
5774 to_type = die_type (die, cu);
5775 domain = die_containing_type (die, cu);
5777 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
5778 type = lookup_methodptr_type (to_type);
5780 type = lookup_memberptr_type (to_type, domain);
5782 return set_die_type (die, type, cu);
5785 /* Extract all information from a DW_TAG_reference_type DIE and add to
5786 the user defined type vector. */
5788 static struct type *
5789 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
5791 struct comp_unit_head *cu_header = &cu->header;
5793 struct attribute *attr;
5795 type = lookup_reference_type (die_type (die, cu));
5796 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5799 TYPE_LENGTH (type) = DW_UNSND (attr);
5803 TYPE_LENGTH (type) = cu_header->addr_size;
5805 return set_die_type (die, type, cu);
5808 static struct type *
5809 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
5811 struct type *base_type, *cv_type;
5813 base_type = die_type (die, cu);
5814 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
5815 return set_die_type (die, cv_type, cu);
5818 static struct type *
5819 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
5821 struct type *base_type, *cv_type;
5823 base_type = die_type (die, cu);
5824 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
5825 return set_die_type (die, cv_type, cu);
5828 /* Extract all information from a DW_TAG_string_type DIE and add to
5829 the user defined type vector. It isn't really a user defined type,
5830 but it behaves like one, with other DIE's using an AT_user_def_type
5831 attribute to reference it. */
5833 static struct type *
5834 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
5836 struct objfile *objfile = cu->objfile;
5837 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5838 struct type *type, *range_type, *index_type, *char_type;
5839 struct attribute *attr;
5840 unsigned int length;
5842 attr = dwarf2_attr (die, DW_AT_string_length, cu);
5845 length = DW_UNSND (attr);
5849 /* check for the DW_AT_byte_size attribute */
5850 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5853 length = DW_UNSND (attr);
5861 index_type = objfile_type (objfile)->builtin_int;
5862 range_type = create_range_type (NULL, index_type, 1, length);
5863 char_type = language_string_char_type (cu->language_defn, gdbarch);
5864 type = create_string_type (NULL, char_type, range_type);
5866 return set_die_type (die, type, cu);
5869 /* Handle DIES due to C code like:
5873 int (*funcp)(int a, long l);
5877 ('funcp' generates a DW_TAG_subroutine_type DIE)
5880 static struct type *
5881 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
5883 struct type *type; /* Type that this function returns */
5884 struct type *ftype; /* Function that returns above type */
5885 struct attribute *attr;
5887 type = die_type (die, cu);
5888 ftype = lookup_function_type (type);
5890 /* All functions in C++, Pascal and Java have prototypes. */
5891 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
5892 if ((attr && (DW_UNSND (attr) != 0))
5893 || cu->language == language_cplus
5894 || cu->language == language_java
5895 || cu->language == language_pascal)
5896 TYPE_PROTOTYPED (ftype) = 1;
5898 /* Store the calling convention in the type if it's available in
5899 the subroutine die. Otherwise set the calling convention to
5900 the default value DW_CC_normal. */
5901 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
5902 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
5904 /* We need to add the subroutine type to the die immediately so
5905 we don't infinitely recurse when dealing with parameters
5906 declared as the same subroutine type. */
5907 set_die_type (die, ftype, cu);
5909 if (die->child != NULL)
5911 struct die_info *child_die;
5915 /* Count the number of parameters.
5916 FIXME: GDB currently ignores vararg functions, but knows about
5917 vararg member functions. */
5918 child_die = die->child;
5919 while (child_die && child_die->tag)
5921 if (child_die->tag == DW_TAG_formal_parameter)
5923 else if (child_die->tag == DW_TAG_unspecified_parameters)
5924 TYPE_VARARGS (ftype) = 1;
5925 child_die = sibling_die (child_die);
5928 /* Allocate storage for parameters and fill them in. */
5929 TYPE_NFIELDS (ftype) = nparams;
5930 TYPE_FIELDS (ftype) = (struct field *)
5931 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
5933 child_die = die->child;
5934 while (child_die && child_die->tag)
5936 if (child_die->tag == DW_TAG_formal_parameter)
5938 /* Dwarf2 has no clean way to discern C++ static and non-static
5939 member functions. G++ helps GDB by marking the first
5940 parameter for non-static member functions (which is the
5941 this pointer) as artificial. We pass this information
5942 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5943 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
5945 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
5947 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
5948 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
5951 child_die = sibling_die (child_die);
5958 static struct type *
5959 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
5961 struct objfile *objfile = cu->objfile;
5962 struct attribute *attr;
5963 const char *name = NULL;
5964 struct type *this_type;
5966 name = dwarf2_full_name (die, cu);
5967 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
5968 TYPE_FLAG_TARGET_STUB, NULL, objfile);
5969 TYPE_NAME (this_type) = (char *) name;
5970 set_die_type (die, this_type, cu);
5971 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
5975 /* Find a representation of a given base type and install
5976 it in the TYPE field of the die. */
5978 static struct type *
5979 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
5981 struct objfile *objfile = cu->objfile;
5983 struct attribute *attr;
5984 int encoding = 0, size = 0;
5986 enum type_code code = TYPE_CODE_INT;
5988 struct type *target_type = NULL;
5990 attr = dwarf2_attr (die, DW_AT_encoding, cu);
5993 encoding = DW_UNSND (attr);
5995 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5998 size = DW_UNSND (attr);
6000 name = dwarf2_name (die, cu);
6003 complaint (&symfile_complaints,
6004 _("DW_AT_name missing from DW_TAG_base_type"));
6009 case DW_ATE_address:
6010 /* Turn DW_ATE_address into a void * pointer. */
6011 code = TYPE_CODE_PTR;
6012 type_flags |= TYPE_FLAG_UNSIGNED;
6013 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
6015 case DW_ATE_boolean:
6016 code = TYPE_CODE_BOOL;
6017 type_flags |= TYPE_FLAG_UNSIGNED;
6019 case DW_ATE_complex_float:
6020 code = TYPE_CODE_COMPLEX;
6021 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
6023 case DW_ATE_decimal_float:
6024 code = TYPE_CODE_DECFLOAT;
6027 code = TYPE_CODE_FLT;
6031 case DW_ATE_unsigned:
6032 type_flags |= TYPE_FLAG_UNSIGNED;
6034 case DW_ATE_signed_char:
6035 if (cu->language == language_ada || cu->language == language_m2
6036 || cu->language == language_pascal)
6037 code = TYPE_CODE_CHAR;
6039 case DW_ATE_unsigned_char:
6040 if (cu->language == language_ada || cu->language == language_m2
6041 || cu->language == language_pascal)
6042 code = TYPE_CODE_CHAR;
6043 type_flags |= TYPE_FLAG_UNSIGNED;
6046 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
6047 dwarf_type_encoding_name (encoding));
6051 type = init_type (code, size, type_flags, NULL, objfile);
6052 TYPE_NAME (type) = name;
6053 TYPE_TARGET_TYPE (type) = target_type;
6055 if (name && strcmp (name, "char") == 0)
6056 TYPE_NOSIGN (type) = 1;
6058 return set_die_type (die, type, cu);
6061 /* Read the given DW_AT_subrange DIE. */
6063 static struct type *
6064 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
6066 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
6067 struct type *base_type;
6068 struct type *range_type;
6069 struct attribute *attr;
6073 LONGEST negative_mask;
6075 base_type = die_type (die, cu);
6076 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
6078 complaint (&symfile_complaints,
6079 _("DW_AT_type missing from DW_TAG_subrange_type"));
6081 = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8,
6082 0, NULL, cu->objfile);
6085 if (cu->language == language_fortran)
6087 /* FORTRAN implies a lower bound of 1, if not given. */
6091 /* FIXME: For variable sized arrays either of these could be
6092 a variable rather than a constant value. We'll allow it,
6093 but we don't know how to handle it. */
6094 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
6096 low = dwarf2_get_attr_constant_value (attr, 0);
6098 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
6101 if (attr->form == DW_FORM_block1)
6103 /* GCC encodes arrays with unspecified or dynamic length
6104 with a DW_FORM_block1 attribute.
6105 FIXME: GDB does not yet know how to handle dynamic
6106 arrays properly, treat them as arrays with unspecified
6109 FIXME: jimb/2003-09-22: GDB does not really know
6110 how to handle arrays of unspecified length
6111 either; we just represent them as zero-length
6112 arrays. Choose an appropriate upper bound given
6113 the lower bound we've computed above. */
6117 high = dwarf2_get_attr_constant_value (attr, 1);
6121 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
6122 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
6123 low |= negative_mask;
6124 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
6125 high |= negative_mask;
6127 range_type = create_range_type (NULL, base_type, low, high);
6129 name = dwarf2_name (die, cu);
6131 TYPE_NAME (range_type) = name;
6133 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6135 TYPE_LENGTH (range_type) = DW_UNSND (attr);
6137 set_descriptive_type (range_type, die, cu);
6139 return set_die_type (die, range_type, cu);
6142 static struct type *
6143 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
6147 /* For now, we only support the C meaning of an unspecified type: void. */
6149 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
6150 TYPE_NAME (type) = dwarf2_name (die, cu);
6152 return set_die_type (die, type, cu);
6155 /* Trivial hash function for die_info: the hash value of a DIE
6156 is its offset in .debug_info for this objfile. */
6159 die_hash (const void *item)
6161 const struct die_info *die = item;
6165 /* Trivial comparison function for die_info structures: two DIEs
6166 are equal if they have the same offset. */
6169 die_eq (const void *item_lhs, const void *item_rhs)
6171 const struct die_info *die_lhs = item_lhs;
6172 const struct die_info *die_rhs = item_rhs;
6173 return die_lhs->offset == die_rhs->offset;
6176 /* Read a whole compilation unit into a linked list of dies. */
6178 static struct die_info *
6179 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
6181 struct die_reader_specs reader_specs;
6183 gdb_assert (cu->die_hash == NULL);
6185 = htab_create_alloc_ex (cu->header.length / 12,
6189 &cu->comp_unit_obstack,
6190 hashtab_obstack_allocate,
6191 dummy_obstack_deallocate);
6193 init_cu_die_reader (&reader_specs, cu);
6195 return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
6198 /* Main entry point for reading a DIE and all children.
6199 Read the DIE and dump it if requested. */
6201 static struct die_info *
6202 read_die_and_children (const struct die_reader_specs *reader,
6204 gdb_byte **new_info_ptr,
6205 struct die_info *parent)
6207 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
6208 new_info_ptr, parent);
6210 if (dwarf2_die_debug)
6212 fprintf_unfiltered (gdb_stdlog,
6213 "\nRead die from %s of %s:\n",
6214 reader->buffer == dwarf2_per_objfile->info.buffer
6216 : reader->buffer == dwarf2_per_objfile->types.buffer
6218 : "unknown section",
6219 reader->abfd->filename);
6220 dump_die (result, dwarf2_die_debug);
6226 /* Read a single die and all its descendents. Set the die's sibling
6227 field to NULL; set other fields in the die correctly, and set all
6228 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6229 location of the info_ptr after reading all of those dies. PARENT
6230 is the parent of the die in question. */
6232 static struct die_info *
6233 read_die_and_children_1 (const struct die_reader_specs *reader,
6235 gdb_byte **new_info_ptr,
6236 struct die_info *parent)
6238 struct die_info *die;
6242 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
6245 *new_info_ptr = cur_ptr;
6248 store_in_ref_table (die, reader->cu);
6251 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
6255 *new_info_ptr = cur_ptr;
6258 die->sibling = NULL;
6259 die->parent = parent;
6263 /* Read a die, all of its descendents, and all of its siblings; set
6264 all of the fields of all of the dies correctly. Arguments are as
6265 in read_die_and_children. */
6267 static struct die_info *
6268 read_die_and_siblings (const struct die_reader_specs *reader,
6270 gdb_byte **new_info_ptr,
6271 struct die_info *parent)
6273 struct die_info *first_die, *last_sibling;
6277 first_die = last_sibling = NULL;
6281 struct die_info *die
6282 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
6286 *new_info_ptr = cur_ptr;
6293 last_sibling->sibling = die;
6299 /* Read the die from the .debug_info section buffer. Set DIEP to
6300 point to a newly allocated die with its information, except for its
6301 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6302 whether the die has children or not. */
6305 read_full_die (const struct die_reader_specs *reader,
6306 struct die_info **diep, gdb_byte *info_ptr,
6309 unsigned int abbrev_number, bytes_read, i, offset;
6310 struct abbrev_info *abbrev;
6311 struct die_info *die;
6312 struct dwarf2_cu *cu = reader->cu;
6313 bfd *abfd = reader->abfd;
6315 offset = info_ptr - reader->buffer;
6316 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6317 info_ptr += bytes_read;
6325 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
6327 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6329 bfd_get_filename (abfd));
6331 die = dwarf_alloc_die (cu, abbrev->num_attrs);
6332 die->offset = offset;
6333 die->tag = abbrev->tag;
6334 die->abbrev = abbrev_number;
6336 die->num_attrs = abbrev->num_attrs;
6338 for (i = 0; i < abbrev->num_attrs; ++i)
6339 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
6340 abfd, info_ptr, cu);
6343 *has_children = abbrev->has_children;
6347 /* In DWARF version 2, the description of the debugging information is
6348 stored in a separate .debug_abbrev section. Before we read any
6349 dies from a section we read in all abbreviations and install them
6350 in a hash table. This function also sets flags in CU describing
6351 the data found in the abbrev table. */
6354 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
6356 struct comp_unit_head *cu_header = &cu->header;
6357 gdb_byte *abbrev_ptr;
6358 struct abbrev_info *cur_abbrev;
6359 unsigned int abbrev_number, bytes_read, abbrev_name;
6360 unsigned int abbrev_form, hash_number;
6361 struct attr_abbrev *cur_attrs;
6362 unsigned int allocated_attrs;
6364 /* Initialize dwarf2 abbrevs */
6365 obstack_init (&cu->abbrev_obstack);
6366 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
6368 * sizeof (struct abbrev_info *)));
6369 memset (cu->dwarf2_abbrevs, 0,
6370 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
6372 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
6373 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6374 abbrev_ptr += bytes_read;
6376 allocated_attrs = ATTR_ALLOC_CHUNK;
6377 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
6379 /* loop until we reach an abbrev number of 0 */
6380 while (abbrev_number)
6382 cur_abbrev = dwarf_alloc_abbrev (cu);
6384 /* read in abbrev header */
6385 cur_abbrev->number = abbrev_number;
6386 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6387 abbrev_ptr += bytes_read;
6388 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
6391 if (cur_abbrev->tag == DW_TAG_namespace)
6392 cu->has_namespace_info = 1;
6394 /* now read in declarations */
6395 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6396 abbrev_ptr += bytes_read;
6397 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6398 abbrev_ptr += bytes_read;
6401 if (cur_abbrev->num_attrs == allocated_attrs)
6403 allocated_attrs += ATTR_ALLOC_CHUNK;
6405 = xrealloc (cur_attrs, (allocated_attrs
6406 * sizeof (struct attr_abbrev)));
6409 /* Record whether this compilation unit might have
6410 inter-compilation-unit references. If we don't know what form
6411 this attribute will have, then it might potentially be a
6412 DW_FORM_ref_addr, so we conservatively expect inter-CU
6415 if (abbrev_form == DW_FORM_ref_addr
6416 || abbrev_form == DW_FORM_indirect)
6417 cu->has_form_ref_addr = 1;
6419 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
6420 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
6421 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6422 abbrev_ptr += bytes_read;
6423 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6424 abbrev_ptr += bytes_read;
6427 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
6428 (cur_abbrev->num_attrs
6429 * sizeof (struct attr_abbrev)));
6430 memcpy (cur_abbrev->attrs, cur_attrs,
6431 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
6433 hash_number = abbrev_number % ABBREV_HASH_SIZE;
6434 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
6435 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
6437 /* Get next abbreviation.
6438 Under Irix6 the abbreviations for a compilation unit are not
6439 always properly terminated with an abbrev number of 0.
6440 Exit loop if we encounter an abbreviation which we have
6441 already read (which means we are about to read the abbreviations
6442 for the next compile unit) or if the end of the abbreviation
6443 table is reached. */
6444 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
6445 >= dwarf2_per_objfile->abbrev.size)
6447 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6448 abbrev_ptr += bytes_read;
6449 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
6456 /* Release the memory used by the abbrev table for a compilation unit. */
6459 dwarf2_free_abbrev_table (void *ptr_to_cu)
6461 struct dwarf2_cu *cu = ptr_to_cu;
6463 obstack_free (&cu->abbrev_obstack, NULL);
6464 cu->dwarf2_abbrevs = NULL;
6467 /* Lookup an abbrev_info structure in the abbrev hash table. */
6469 static struct abbrev_info *
6470 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
6472 unsigned int hash_number;
6473 struct abbrev_info *abbrev;
6475 hash_number = number % ABBREV_HASH_SIZE;
6476 abbrev = cu->dwarf2_abbrevs[hash_number];
6480 if (abbrev->number == number)
6483 abbrev = abbrev->next;
6488 /* Returns nonzero if TAG represents a type that we might generate a partial
6492 is_type_tag_for_partial (int tag)
6497 /* Some types that would be reasonable to generate partial symbols for,
6498 that we don't at present. */
6499 case DW_TAG_array_type:
6500 case DW_TAG_file_type:
6501 case DW_TAG_ptr_to_member_type:
6502 case DW_TAG_set_type:
6503 case DW_TAG_string_type:
6504 case DW_TAG_subroutine_type:
6506 case DW_TAG_base_type:
6507 case DW_TAG_class_type:
6508 case DW_TAG_interface_type:
6509 case DW_TAG_enumeration_type:
6510 case DW_TAG_structure_type:
6511 case DW_TAG_subrange_type:
6512 case DW_TAG_typedef:
6513 case DW_TAG_union_type:
6520 /* Load all DIEs that are interesting for partial symbols into memory. */
6522 static struct partial_die_info *
6523 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
6524 int building_psymtab, struct dwarf2_cu *cu)
6526 struct partial_die_info *part_die;
6527 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
6528 struct abbrev_info *abbrev;
6529 unsigned int bytes_read;
6530 unsigned int load_all = 0;
6532 int nesting_level = 1;
6537 if (cu->per_cu && cu->per_cu->load_all_dies)
6541 = htab_create_alloc_ex (cu->header.length / 12,
6545 &cu->comp_unit_obstack,
6546 hashtab_obstack_allocate,
6547 dummy_obstack_deallocate);
6549 part_die = obstack_alloc (&cu->comp_unit_obstack,
6550 sizeof (struct partial_die_info));
6554 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6556 /* A NULL abbrev means the end of a series of children. */
6559 if (--nesting_level == 0)
6561 /* PART_DIE was probably the last thing allocated on the
6562 comp_unit_obstack, so we could call obstack_free
6563 here. We don't do that because the waste is small,
6564 and will be cleaned up when we're done with this
6565 compilation unit. This way, we're also more robust
6566 against other users of the comp_unit_obstack. */
6569 info_ptr += bytes_read;
6570 last_die = parent_die;
6571 parent_die = parent_die->die_parent;
6575 /* Check whether this DIE is interesting enough to save. Normally
6576 we would not be interested in members here, but there may be
6577 later variables referencing them via DW_AT_specification (for
6580 && !is_type_tag_for_partial (abbrev->tag)
6581 && abbrev->tag != DW_TAG_enumerator
6582 && abbrev->tag != DW_TAG_subprogram
6583 && abbrev->tag != DW_TAG_lexical_block
6584 && abbrev->tag != DW_TAG_variable
6585 && abbrev->tag != DW_TAG_namespace
6586 && abbrev->tag != DW_TAG_member)
6588 /* Otherwise we skip to the next sibling, if any. */
6589 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
6593 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
6594 buffer, info_ptr, cu);
6596 /* This two-pass algorithm for processing partial symbols has a
6597 high cost in cache pressure. Thus, handle some simple cases
6598 here which cover the majority of C partial symbols. DIEs
6599 which neither have specification tags in them, nor could have
6600 specification tags elsewhere pointing at them, can simply be
6601 processed and discarded.
6603 This segment is also optional; scan_partial_symbols and
6604 add_partial_symbol will handle these DIEs if we chain
6605 them in normally. When compilers which do not emit large
6606 quantities of duplicate debug information are more common,
6607 this code can probably be removed. */
6609 /* Any complete simple types at the top level (pretty much all
6610 of them, for a language without namespaces), can be processed
6612 if (parent_die == NULL
6613 && part_die->has_specification == 0
6614 && part_die->is_declaration == 0
6615 && (part_die->tag == DW_TAG_typedef
6616 || part_die->tag == DW_TAG_base_type
6617 || part_die->tag == DW_TAG_subrange_type))
6619 if (building_psymtab && part_die->name != NULL)
6620 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6621 VAR_DOMAIN, LOC_TYPEDEF,
6622 &cu->objfile->static_psymbols,
6623 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6624 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6628 /* If we're at the second level, and we're an enumerator, and
6629 our parent has no specification (meaning possibly lives in a
6630 namespace elsewhere), then we can add the partial symbol now
6631 instead of queueing it. */
6632 if (part_die->tag == DW_TAG_enumerator
6633 && parent_die != NULL
6634 && parent_die->die_parent == NULL
6635 && parent_die->tag == DW_TAG_enumeration_type
6636 && parent_die->has_specification == 0)
6638 if (part_die->name == NULL)
6639 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6640 else if (building_psymtab)
6641 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6642 VAR_DOMAIN, LOC_CONST,
6643 (cu->language == language_cplus
6644 || cu->language == language_java)
6645 ? &cu->objfile->global_psymbols
6646 : &cu->objfile->static_psymbols,
6647 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6649 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6653 /* We'll save this DIE so link it in. */
6654 part_die->die_parent = parent_die;
6655 part_die->die_sibling = NULL;
6656 part_die->die_child = NULL;
6658 if (last_die && last_die == parent_die)
6659 last_die->die_child = part_die;
6661 last_die->die_sibling = part_die;
6663 last_die = part_die;
6665 if (first_die == NULL)
6666 first_die = part_die;
6668 /* Maybe add the DIE to the hash table. Not all DIEs that we
6669 find interesting need to be in the hash table, because we
6670 also have the parent/sibling/child chains; only those that we
6671 might refer to by offset later during partial symbol reading.
6673 For now this means things that might have be the target of a
6674 DW_AT_specification, DW_AT_abstract_origin, or
6675 DW_AT_extension. DW_AT_extension will refer only to
6676 namespaces; DW_AT_abstract_origin refers to functions (and
6677 many things under the function DIE, but we do not recurse
6678 into function DIEs during partial symbol reading) and
6679 possibly variables as well; DW_AT_specification refers to
6680 declarations. Declarations ought to have the DW_AT_declaration
6681 flag. It happens that GCC forgets to put it in sometimes, but
6682 only for functions, not for types.
6684 Adding more things than necessary to the hash table is harmless
6685 except for the performance cost. Adding too few will result in
6686 wasted time in find_partial_die, when we reread the compilation
6687 unit with load_all_dies set. */
6690 || abbrev->tag == DW_TAG_subprogram
6691 || abbrev->tag == DW_TAG_variable
6692 || abbrev->tag == DW_TAG_namespace
6693 || part_die->is_declaration)
6697 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
6698 part_die->offset, INSERT);
6702 part_die = obstack_alloc (&cu->comp_unit_obstack,
6703 sizeof (struct partial_die_info));
6705 /* For some DIEs we want to follow their children (if any). For C
6706 we have no reason to follow the children of structures; for other
6707 languages we have to, both so that we can get at method physnames
6708 to infer fully qualified class names, and for DW_AT_specification.
6710 For Ada, we need to scan the children of subprograms and lexical
6711 blocks as well because Ada allows the definition of nested
6712 entities that could be interesting for the debugger, such as
6713 nested subprograms for instance. */
6714 if (last_die->has_children
6716 || last_die->tag == DW_TAG_namespace
6717 || last_die->tag == DW_TAG_enumeration_type
6718 || (cu->language != language_c
6719 && (last_die->tag == DW_TAG_class_type
6720 || last_die->tag == DW_TAG_interface_type
6721 || last_die->tag == DW_TAG_structure_type
6722 || last_die->tag == DW_TAG_union_type))
6723 || (cu->language == language_ada
6724 && (last_die->tag == DW_TAG_subprogram
6725 || last_die->tag == DW_TAG_lexical_block))))
6728 parent_die = last_die;
6732 /* Otherwise we skip to the next sibling, if any. */
6733 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
6735 /* Back to the top, do it again. */
6739 /* Read a minimal amount of information into the minimal die structure. */
6742 read_partial_die (struct partial_die_info *part_die,
6743 struct abbrev_info *abbrev,
6744 unsigned int abbrev_len, bfd *abfd,
6745 gdb_byte *buffer, gdb_byte *info_ptr,
6746 struct dwarf2_cu *cu)
6748 unsigned int bytes_read, i;
6749 struct attribute attr;
6750 int has_low_pc_attr = 0;
6751 int has_high_pc_attr = 0;
6753 memset (part_die, 0, sizeof (struct partial_die_info));
6755 part_die->offset = info_ptr - buffer;
6757 info_ptr += abbrev_len;
6762 part_die->tag = abbrev->tag;
6763 part_die->has_children = abbrev->has_children;
6765 for (i = 0; i < abbrev->num_attrs; ++i)
6767 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
6769 /* Store the data if it is of an attribute we want to keep in a
6770 partial symbol table. */
6774 switch (part_die->tag)
6776 case DW_TAG_compile_unit:
6777 case DW_TAG_type_unit:
6778 /* Compilation units have a DW_AT_name that is a filename, not
6779 a source language identifier. */
6780 case DW_TAG_enumeration_type:
6781 case DW_TAG_enumerator:
6782 /* These tags always have simple identifiers already; no need
6783 to canonicalize them. */
6784 part_die->name = DW_STRING (&attr);
6788 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
6789 &cu->comp_unit_obstack);
6793 case DW_AT_MIPS_linkage_name:
6794 part_die->name = DW_STRING (&attr);
6797 has_low_pc_attr = 1;
6798 part_die->lowpc = DW_ADDR (&attr);
6801 has_high_pc_attr = 1;
6802 part_die->highpc = DW_ADDR (&attr);
6804 case DW_AT_location:
6805 /* Support the .debug_loc offsets */
6806 if (attr_form_is_block (&attr))
6808 part_die->locdesc = DW_BLOCK (&attr);
6810 else if (attr_form_is_section_offset (&attr))
6812 dwarf2_complex_location_expr_complaint ();
6816 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6817 "partial symbol information");
6820 case DW_AT_external:
6821 part_die->is_external = DW_UNSND (&attr);
6823 case DW_AT_declaration:
6824 part_die->is_declaration = DW_UNSND (&attr);
6827 part_die->has_type = 1;
6829 case DW_AT_abstract_origin:
6830 case DW_AT_specification:
6831 case DW_AT_extension:
6832 part_die->has_specification = 1;
6833 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
6836 /* Ignore absolute siblings, they might point outside of
6837 the current compile unit. */
6838 if (attr.form == DW_FORM_ref_addr)
6839 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
6841 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
6843 case DW_AT_byte_size:
6844 part_die->has_byte_size = 1;
6846 case DW_AT_calling_convention:
6847 /* DWARF doesn't provide a way to identify a program's source-level
6848 entry point. DW_AT_calling_convention attributes are only meant
6849 to describe functions' calling conventions.
6851 However, because it's a necessary piece of information in
6852 Fortran, and because DW_CC_program is the only piece of debugging
6853 information whose definition refers to a 'main program' at all,
6854 several compilers have begun marking Fortran main programs with
6855 DW_CC_program --- even when those functions use the standard
6856 calling conventions.
6858 So until DWARF specifies a way to provide this information and
6859 compilers pick up the new representation, we'll support this
6861 if (DW_UNSND (&attr) == DW_CC_program
6862 && cu->language == language_fortran)
6863 set_main_name (part_die->name);
6870 /* When using the GNU linker, .gnu.linkonce. sections are used to
6871 eliminate duplicate copies of functions and vtables and such.
6872 The linker will arbitrarily choose one and discard the others.
6873 The AT_*_pc values for such functions refer to local labels in
6874 these sections. If the section from that file was discarded, the
6875 labels are not in the output, so the relocs get a value of 0.
6876 If this is a discarded function, mark the pc bounds as invalid,
6877 so that GDB will ignore it. */
6878 if (has_low_pc_attr && has_high_pc_attr
6879 && part_die->lowpc < part_die->highpc
6880 && (part_die->lowpc != 0
6881 || dwarf2_per_objfile->has_section_at_zero))
6882 part_die->has_pc_info = 1;
6887 /* Find a cached partial DIE at OFFSET in CU. */
6889 static struct partial_die_info *
6890 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
6892 struct partial_die_info *lookup_die = NULL;
6893 struct partial_die_info part_die;
6895 part_die.offset = offset;
6896 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
6901 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6902 except in the case of .debug_types DIEs which do not reference
6903 outside their CU (they do however referencing other types via
6906 static struct partial_die_info *
6907 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
6909 struct dwarf2_per_cu_data *per_cu = NULL;
6910 struct partial_die_info *pd = NULL;
6912 if (cu->per_cu->from_debug_types)
6914 pd = find_partial_die_in_comp_unit (offset, cu);
6920 if (offset_in_cu_p (&cu->header, offset))
6922 pd = find_partial_die_in_comp_unit (offset, cu);
6927 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
6929 if (per_cu->cu == NULL)
6931 load_partial_comp_unit (per_cu, cu->objfile);
6932 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
6933 dwarf2_per_objfile->read_in_chain = per_cu;
6936 per_cu->cu->last_used = 0;
6937 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6939 if (pd == NULL && per_cu->load_all_dies == 0)
6941 struct cleanup *back_to;
6942 struct partial_die_info comp_unit_die;
6943 struct abbrev_info *abbrev;
6944 unsigned int bytes_read;
6947 per_cu->load_all_dies = 1;
6949 /* Re-read the DIEs. */
6950 back_to = make_cleanup (null_cleanup, 0);
6951 if (per_cu->cu->dwarf2_abbrevs == NULL)
6953 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
6954 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
6956 info_ptr = (dwarf2_per_objfile->info.buffer
6957 + per_cu->cu->header.offset
6958 + per_cu->cu->header.first_die_offset);
6959 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
6960 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
6961 per_cu->cu->objfile->obfd,
6962 dwarf2_per_objfile->info.buffer, info_ptr,
6964 if (comp_unit_die.has_children)
6965 load_partial_dies (per_cu->cu->objfile->obfd,
6966 dwarf2_per_objfile->info.buffer, info_ptr,
6968 do_cleanups (back_to);
6970 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6976 internal_error (__FILE__, __LINE__,
6977 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6978 offset, bfd_get_filename (cu->objfile->obfd));
6982 /* Adjust PART_DIE before generating a symbol for it. This function
6983 may set the is_external flag or change the DIE's name. */
6986 fixup_partial_die (struct partial_die_info *part_die,
6987 struct dwarf2_cu *cu)
6989 /* If we found a reference attribute and the DIE has no name, try
6990 to find a name in the referred to DIE. */
6992 if (part_die->name == NULL && part_die->has_specification)
6994 struct partial_die_info *spec_die;
6996 spec_die = find_partial_die (part_die->spec_offset, cu);
6998 fixup_partial_die (spec_die, cu);
7002 part_die->name = spec_die->name;
7004 /* Copy DW_AT_external attribute if it is set. */
7005 if (spec_die->is_external)
7006 part_die->is_external = spec_die->is_external;
7010 /* Set default names for some unnamed DIEs. */
7011 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
7012 || part_die->tag == DW_TAG_class_type))
7013 part_die->name = "(anonymous class)";
7015 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
7016 part_die->name = "(anonymous namespace)";
7018 if (part_die->tag == DW_TAG_structure_type
7019 || part_die->tag == DW_TAG_class_type
7020 || part_die->tag == DW_TAG_union_type)
7021 guess_structure_name (part_die, cu);
7024 /* Read an attribute value described by an attribute form. */
7027 read_attribute_value (struct attribute *attr, unsigned form,
7028 bfd *abfd, gdb_byte *info_ptr,
7029 struct dwarf2_cu *cu)
7031 struct comp_unit_head *cu_header = &cu->header;
7032 unsigned int bytes_read;
7033 struct dwarf_block *blk;
7039 case DW_FORM_ref_addr:
7040 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
7041 info_ptr += bytes_read;
7043 case DW_FORM_block2:
7044 blk = dwarf_alloc_block (cu);
7045 blk->size = read_2_bytes (abfd, info_ptr);
7047 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7048 info_ptr += blk->size;
7049 DW_BLOCK (attr) = blk;
7051 case DW_FORM_block4:
7052 blk = dwarf_alloc_block (cu);
7053 blk->size = read_4_bytes (abfd, info_ptr);
7055 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7056 info_ptr += blk->size;
7057 DW_BLOCK (attr) = blk;
7060 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
7064 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
7068 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
7071 case DW_FORM_string:
7072 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
7073 DW_STRING_IS_CANONICAL (attr) = 0;
7074 info_ptr += bytes_read;
7077 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
7079 DW_STRING_IS_CANONICAL (attr) = 0;
7080 info_ptr += bytes_read;
7083 blk = dwarf_alloc_block (cu);
7084 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7085 info_ptr += bytes_read;
7086 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7087 info_ptr += blk->size;
7088 DW_BLOCK (attr) = blk;
7090 case DW_FORM_block1:
7091 blk = dwarf_alloc_block (cu);
7092 blk->size = read_1_byte (abfd, info_ptr);
7094 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7095 info_ptr += blk->size;
7096 DW_BLOCK (attr) = blk;
7099 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7103 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7107 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
7108 info_ptr += bytes_read;
7111 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7112 info_ptr += bytes_read;
7115 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
7119 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
7123 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
7127 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
7131 /* Convert the signature to something we can record in DW_UNSND
7133 NOTE: This is NULL if the type wasn't found. */
7134 DW_SIGNATURED_TYPE (attr) =
7135 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
7138 case DW_FORM_ref_udata:
7139 DW_ADDR (attr) = (cu->header.offset
7140 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
7141 info_ptr += bytes_read;
7143 case DW_FORM_indirect:
7144 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7145 info_ptr += bytes_read;
7146 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
7149 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7150 dwarf_form_name (form),
7151 bfd_get_filename (abfd));
7154 /* We have seen instances where the compiler tried to emit a byte
7155 size attribute of -1 which ended up being encoded as an unsigned
7156 0xffffffff. Although 0xffffffff is technically a valid size value,
7157 an object of this size seems pretty unlikely so we can relatively
7158 safely treat these cases as if the size attribute was invalid and
7159 treat them as zero by default. */
7160 if (attr->name == DW_AT_byte_size
7161 && form == DW_FORM_data4
7162 && DW_UNSND (attr) >= 0xffffffff)
7165 (&symfile_complaints,
7166 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7167 hex_string (DW_UNSND (attr)));
7168 DW_UNSND (attr) = 0;
7174 /* Read an attribute described by an abbreviated attribute. */
7177 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
7178 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
7180 attr->name = abbrev->name;
7181 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
7184 /* read dwarf information from a buffer */
7187 read_1_byte (bfd *abfd, gdb_byte *buf)
7189 return bfd_get_8 (abfd, buf);
7193 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
7195 return bfd_get_signed_8 (abfd, buf);
7199 read_2_bytes (bfd *abfd, gdb_byte *buf)
7201 return bfd_get_16 (abfd, buf);
7205 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
7207 return bfd_get_signed_16 (abfd, buf);
7211 read_4_bytes (bfd *abfd, gdb_byte *buf)
7213 return bfd_get_32 (abfd, buf);
7217 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
7219 return bfd_get_signed_32 (abfd, buf);
7223 read_8_bytes (bfd *abfd, gdb_byte *buf)
7225 return bfd_get_64 (abfd, buf);
7229 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
7230 unsigned int *bytes_read)
7232 struct comp_unit_head *cu_header = &cu->header;
7233 CORE_ADDR retval = 0;
7235 if (cu_header->signed_addr_p)
7237 switch (cu_header->addr_size)
7240 retval = bfd_get_signed_16 (abfd, buf);
7243 retval = bfd_get_signed_32 (abfd, buf);
7246 retval = bfd_get_signed_64 (abfd, buf);
7249 internal_error (__FILE__, __LINE__,
7250 _("read_address: bad switch, signed [in module %s]"),
7251 bfd_get_filename (abfd));
7256 switch (cu_header->addr_size)
7259 retval = bfd_get_16 (abfd, buf);
7262 retval = bfd_get_32 (abfd, buf);
7265 retval = bfd_get_64 (abfd, buf);
7268 internal_error (__FILE__, __LINE__,
7269 _("read_address: bad switch, unsigned [in module %s]"),
7270 bfd_get_filename (abfd));
7274 *bytes_read = cu_header->addr_size;
7278 /* Read the initial length from a section. The (draft) DWARF 3
7279 specification allows the initial length to take up either 4 bytes
7280 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7281 bytes describe the length and all offsets will be 8 bytes in length
7284 An older, non-standard 64-bit format is also handled by this
7285 function. The older format in question stores the initial length
7286 as an 8-byte quantity without an escape value. Lengths greater
7287 than 2^32 aren't very common which means that the initial 4 bytes
7288 is almost always zero. Since a length value of zero doesn't make
7289 sense for the 32-bit format, this initial zero can be considered to
7290 be an escape value which indicates the presence of the older 64-bit
7291 format. As written, the code can't detect (old format) lengths
7292 greater than 4GB. If it becomes necessary to handle lengths
7293 somewhat larger than 4GB, we could allow other small values (such
7294 as the non-sensical values of 1, 2, and 3) to also be used as
7295 escape values indicating the presence of the old format.
7297 The value returned via bytes_read should be used to increment the
7298 relevant pointer after calling read_initial_length().
7300 [ Note: read_initial_length() and read_offset() are based on the
7301 document entitled "DWARF Debugging Information Format", revision
7302 3, draft 8, dated November 19, 2001. This document was obtained
7305 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7307 This document is only a draft and is subject to change. (So beware.)
7309 Details regarding the older, non-standard 64-bit format were
7310 determined empirically by examining 64-bit ELF files produced by
7311 the SGI toolchain on an IRIX 6.5 machine.
7313 - Kevin, July 16, 2002
7317 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
7319 LONGEST length = bfd_get_32 (abfd, buf);
7321 if (length == 0xffffffff)
7323 length = bfd_get_64 (abfd, buf + 4);
7326 else if (length == 0)
7328 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7329 length = bfd_get_64 (abfd, buf);
7340 /* Cover function for read_initial_length.
7341 Returns the length of the object at BUF, and stores the size of the
7342 initial length in *BYTES_READ and stores the size that offsets will be in
7344 If the initial length size is not equivalent to that specified in
7345 CU_HEADER then issue a complaint.
7346 This is useful when reading non-comp-unit headers. */
7349 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
7350 const struct comp_unit_head *cu_header,
7351 unsigned int *bytes_read,
7352 unsigned int *offset_size)
7354 LONGEST length = read_initial_length (abfd, buf, bytes_read);
7356 gdb_assert (cu_header->initial_length_size == 4
7357 || cu_header->initial_length_size == 8
7358 || cu_header->initial_length_size == 12);
7360 if (cu_header->initial_length_size != *bytes_read)
7361 complaint (&symfile_complaints,
7362 _("intermixed 32-bit and 64-bit DWARF sections"));
7364 *offset_size = (*bytes_read == 4) ? 4 : 8;
7368 /* Read an offset from the data stream. The size of the offset is
7369 given by cu_header->offset_size. */
7372 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
7373 unsigned int *bytes_read)
7375 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
7376 *bytes_read = cu_header->offset_size;
7380 /* Read an offset from the data stream. */
7383 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
7387 switch (offset_size)
7390 retval = bfd_get_32 (abfd, buf);
7393 retval = bfd_get_64 (abfd, buf);
7396 internal_error (__FILE__, __LINE__,
7397 _("read_offset_1: bad switch [in module %s]"),
7398 bfd_get_filename (abfd));
7405 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
7407 /* If the size of a host char is 8 bits, we can return a pointer
7408 to the buffer, otherwise we have to copy the data to a buffer
7409 allocated on the temporary obstack. */
7410 gdb_assert (HOST_CHAR_BIT == 8);
7415 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7417 /* If the size of a host char is 8 bits, we can return a pointer
7418 to the string, otherwise we have to copy the string to a buffer
7419 allocated on the temporary obstack. */
7420 gdb_assert (HOST_CHAR_BIT == 8);
7423 *bytes_read_ptr = 1;
7426 *bytes_read_ptr = strlen ((char *) buf) + 1;
7427 return (char *) buf;
7431 read_indirect_string (bfd *abfd, gdb_byte *buf,
7432 const struct comp_unit_head *cu_header,
7433 unsigned int *bytes_read_ptr)
7435 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
7437 if (dwarf2_per_objfile->str.buffer == NULL)
7439 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7440 bfd_get_filename (abfd));
7443 if (str_offset >= dwarf2_per_objfile->str.size)
7445 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7446 bfd_get_filename (abfd));
7449 gdb_assert (HOST_CHAR_BIT == 8);
7450 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
7452 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
7455 static unsigned long
7456 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7458 unsigned long result;
7459 unsigned int num_read;
7469 byte = bfd_get_8 (abfd, buf);
7472 result |= ((unsigned long)(byte & 127) << shift);
7473 if ((byte & 128) == 0)
7479 *bytes_read_ptr = num_read;
7484 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7487 int i, shift, num_read;
7496 byte = bfd_get_8 (abfd, buf);
7499 result |= ((long)(byte & 127) << shift);
7501 if ((byte & 128) == 0)
7506 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
7507 result |= -(((long)1) << shift);
7508 *bytes_read_ptr = num_read;
7512 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7515 skip_leb128 (bfd *abfd, gdb_byte *buf)
7521 byte = bfd_get_8 (abfd, buf);
7523 if ((byte & 128) == 0)
7529 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
7536 cu->language = language_c;
7538 case DW_LANG_C_plus_plus:
7539 cu->language = language_cplus;
7541 case DW_LANG_Fortran77:
7542 case DW_LANG_Fortran90:
7543 case DW_LANG_Fortran95:
7544 cu->language = language_fortran;
7546 case DW_LANG_Mips_Assembler:
7547 cu->language = language_asm;
7550 cu->language = language_java;
7554 cu->language = language_ada;
7556 case DW_LANG_Modula2:
7557 cu->language = language_m2;
7559 case DW_LANG_Pascal83:
7560 cu->language = language_pascal;
7563 cu->language = language_objc;
7565 case DW_LANG_Cobol74:
7566 case DW_LANG_Cobol85:
7568 cu->language = language_minimal;
7571 cu->language_defn = language_def (cu->language);
7574 /* Return the named attribute or NULL if not there. */
7576 static struct attribute *
7577 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
7580 struct attribute *spec = NULL;
7582 for (i = 0; i < die->num_attrs; ++i)
7584 if (die->attrs[i].name == name)
7585 return &die->attrs[i];
7586 if (die->attrs[i].name == DW_AT_specification
7587 || die->attrs[i].name == DW_AT_abstract_origin)
7588 spec = &die->attrs[i];
7593 die = follow_die_ref (die, spec, &cu);
7594 return dwarf2_attr (die, name, cu);
7600 /* Return the named attribute or NULL if not there,
7601 but do not follow DW_AT_specification, etc.
7602 This is for use in contexts where we're reading .debug_types dies.
7603 Following DW_AT_specification, DW_AT_abstract_origin will take us
7604 back up the chain, and we want to go down. */
7606 static struct attribute *
7607 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
7608 struct dwarf2_cu *cu)
7612 for (i = 0; i < die->num_attrs; ++i)
7613 if (die->attrs[i].name == name)
7614 return &die->attrs[i];
7619 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7620 and holds a non-zero value. This function should only be used for
7621 DW_FORM_flag attributes. */
7624 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
7626 struct attribute *attr = dwarf2_attr (die, name, cu);
7628 return (attr && DW_UNSND (attr));
7632 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
7634 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7635 which value is non-zero. However, we have to be careful with
7636 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7637 (via dwarf2_flag_true_p) follows this attribute. So we may
7638 end up accidently finding a declaration attribute that belongs
7639 to a different DIE referenced by the specification attribute,
7640 even though the given DIE does not have a declaration attribute. */
7641 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
7642 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
7645 /* Return the die giving the specification for DIE, if there is
7646 one. *SPEC_CU is the CU containing DIE on input, and the CU
7647 containing the return value on output. If there is no
7648 specification, but there is an abstract origin, that is
7651 static struct die_info *
7652 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
7654 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
7657 if (spec_attr == NULL)
7658 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
7660 if (spec_attr == NULL)
7663 return follow_die_ref (die, spec_attr, spec_cu);
7666 /* Free the line_header structure *LH, and any arrays and strings it
7669 free_line_header (struct line_header *lh)
7671 if (lh->standard_opcode_lengths)
7672 xfree (lh->standard_opcode_lengths);
7674 /* Remember that all the lh->file_names[i].name pointers are
7675 pointers into debug_line_buffer, and don't need to be freed. */
7677 xfree (lh->file_names);
7679 /* Similarly for the include directory names. */
7680 if (lh->include_dirs)
7681 xfree (lh->include_dirs);
7687 /* Add an entry to LH's include directory table. */
7689 add_include_dir (struct line_header *lh, char *include_dir)
7691 /* Grow the array if necessary. */
7692 if (lh->include_dirs_size == 0)
7694 lh->include_dirs_size = 1; /* for testing */
7695 lh->include_dirs = xmalloc (lh->include_dirs_size
7696 * sizeof (*lh->include_dirs));
7698 else if (lh->num_include_dirs >= lh->include_dirs_size)
7700 lh->include_dirs_size *= 2;
7701 lh->include_dirs = xrealloc (lh->include_dirs,
7702 (lh->include_dirs_size
7703 * sizeof (*lh->include_dirs)));
7706 lh->include_dirs[lh->num_include_dirs++] = include_dir;
7710 /* Add an entry to LH's file name table. */
7712 add_file_name (struct line_header *lh,
7714 unsigned int dir_index,
7715 unsigned int mod_time,
7716 unsigned int length)
7718 struct file_entry *fe;
7720 /* Grow the array if necessary. */
7721 if (lh->file_names_size == 0)
7723 lh->file_names_size = 1; /* for testing */
7724 lh->file_names = xmalloc (lh->file_names_size
7725 * sizeof (*lh->file_names));
7727 else if (lh->num_file_names >= lh->file_names_size)
7729 lh->file_names_size *= 2;
7730 lh->file_names = xrealloc (lh->file_names,
7731 (lh->file_names_size
7732 * sizeof (*lh->file_names)));
7735 fe = &lh->file_names[lh->num_file_names++];
7737 fe->dir_index = dir_index;
7738 fe->mod_time = mod_time;
7739 fe->length = length;
7745 /* Read the statement program header starting at OFFSET in
7746 .debug_line, according to the endianness of ABFD. Return a pointer
7747 to a struct line_header, allocated using xmalloc.
7749 NOTE: the strings in the include directory and file name tables of
7750 the returned object point into debug_line_buffer, and must not be
7752 static struct line_header *
7753 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
7754 struct dwarf2_cu *cu)
7756 struct cleanup *back_to;
7757 struct line_header *lh;
7759 unsigned int bytes_read, offset_size;
7761 char *cur_dir, *cur_file;
7763 if (dwarf2_per_objfile->line.buffer == NULL)
7765 complaint (&symfile_complaints, _("missing .debug_line section"));
7769 /* Make sure that at least there's room for the total_length field.
7770 That could be 12 bytes long, but we're just going to fudge that. */
7771 if (offset + 4 >= dwarf2_per_objfile->line.size)
7773 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7777 lh = xmalloc (sizeof (*lh));
7778 memset (lh, 0, sizeof (*lh));
7779 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
7782 line_ptr = dwarf2_per_objfile->line.buffer + offset;
7784 /* Read in the header. */
7786 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
7787 &bytes_read, &offset_size);
7788 line_ptr += bytes_read;
7789 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
7790 + dwarf2_per_objfile->line.size))
7792 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7795 lh->statement_program_end = line_ptr + lh->total_length;
7796 lh->version = read_2_bytes (abfd, line_ptr);
7798 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
7799 line_ptr += offset_size;
7800 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
7802 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
7804 lh->line_base = read_1_signed_byte (abfd, line_ptr);
7806 lh->line_range = read_1_byte (abfd, line_ptr);
7808 lh->opcode_base = read_1_byte (abfd, line_ptr);
7810 lh->standard_opcode_lengths
7811 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
7813 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
7814 for (i = 1; i < lh->opcode_base; ++i)
7816 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
7820 /* Read directory table. */
7821 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7823 line_ptr += bytes_read;
7824 add_include_dir (lh, cur_dir);
7826 line_ptr += bytes_read;
7828 /* Read file name table. */
7829 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7831 unsigned int dir_index, mod_time, length;
7833 line_ptr += bytes_read;
7834 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7835 line_ptr += bytes_read;
7836 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7837 line_ptr += bytes_read;
7838 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7839 line_ptr += bytes_read;
7841 add_file_name (lh, cur_file, dir_index, mod_time, length);
7843 line_ptr += bytes_read;
7844 lh->statement_program_start = line_ptr;
7846 if (line_ptr > (dwarf2_per_objfile->line.buffer
7847 + dwarf2_per_objfile->line.size))
7848 complaint (&symfile_complaints,
7849 _("line number info header doesn't fit in `.debug_line' section"));
7851 discard_cleanups (back_to);
7855 /* This function exists to work around a bug in certain compilers
7856 (particularly GCC 2.95), in which the first line number marker of a
7857 function does not show up until after the prologue, right before
7858 the second line number marker. This function shifts ADDRESS down
7859 to the beginning of the function if necessary, and is called on
7860 addresses passed to record_line. */
7863 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
7865 struct function_range *fn;
7867 /* Find the function_range containing address. */
7872 cu->cached_fn = cu->first_fn;
7876 if (fn->lowpc <= address && fn->highpc > address)
7882 while (fn && fn != cu->cached_fn)
7883 if (fn->lowpc <= address && fn->highpc > address)
7893 if (address != fn->lowpc)
7894 complaint (&symfile_complaints,
7895 _("misplaced first line number at 0x%lx for '%s'"),
7896 (unsigned long) address, fn->name);
7901 /* Decode the Line Number Program (LNP) for the given line_header
7902 structure and CU. The actual information extracted and the type
7903 of structures created from the LNP depends on the value of PST.
7905 1. If PST is NULL, then this procedure uses the data from the program
7906 to create all necessary symbol tables, and their linetables.
7907 The compilation directory of the file is passed in COMP_DIR,
7908 and must not be NULL.
7910 2. If PST is not NULL, this procedure reads the program to determine
7911 the list of files included by the unit represented by PST, and
7912 builds all the associated partial symbol tables. In this case,
7913 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7914 is not used to compute the full name of the symtab, and therefore
7915 omitting it when building the partial symtab does not introduce
7916 the potential for inconsistency - a partial symtab and its associated
7917 symbtab having a different fullname -). */
7920 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
7921 struct dwarf2_cu *cu, struct partial_symtab *pst)
7923 gdb_byte *line_ptr, *extended_end;
7925 unsigned int bytes_read, extended_len;
7926 unsigned char op_code, extended_op, adj_opcode;
7928 struct objfile *objfile = cu->objfile;
7929 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7930 const int decode_for_pst_p = (pst != NULL);
7931 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
7933 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7935 line_ptr = lh->statement_program_start;
7936 line_end = lh->statement_program_end;
7938 /* Read the statement sequences until there's nothing left. */
7939 while (line_ptr < line_end)
7941 /* state machine registers */
7942 CORE_ADDR address = 0;
7943 unsigned int file = 1;
7944 unsigned int line = 1;
7945 unsigned int column = 0;
7946 int is_stmt = lh->default_is_stmt;
7947 int basic_block = 0;
7948 int end_sequence = 0;
7951 if (!decode_for_pst_p && lh->num_file_names >= file)
7953 /* Start a subfile for the current file of the state machine. */
7954 /* lh->include_dirs and lh->file_names are 0-based, but the
7955 directory and file name numbers in the statement program
7957 struct file_entry *fe = &lh->file_names[file - 1];
7961 dir = lh->include_dirs[fe->dir_index - 1];
7963 dwarf2_start_subfile (fe->name, dir, comp_dir);
7966 /* Decode the table. */
7967 while (!end_sequence)
7969 op_code = read_1_byte (abfd, line_ptr);
7971 if (line_ptr > line_end)
7973 dwarf2_debug_line_missing_end_sequence_complaint ();
7977 if (op_code >= lh->opcode_base)
7979 /* Special operand. */
7980 adj_opcode = op_code - lh->opcode_base;
7981 address += (adj_opcode / lh->line_range)
7982 * lh->minimum_instruction_length;
7983 line += lh->line_base + (adj_opcode % lh->line_range);
7984 if (lh->num_file_names < file || file == 0)
7985 dwarf2_debug_line_missing_file_complaint ();
7988 lh->file_names[file - 1].included_p = 1;
7989 if (!decode_for_pst_p && is_stmt)
7991 if (last_subfile != current_subfile)
7993 addr = gdbarch_addr_bits_remove (gdbarch, address);
7995 record_line (last_subfile, 0, addr);
7996 last_subfile = current_subfile;
7998 /* Append row to matrix using current values. */
7999 addr = check_cu_functions (address, cu);
8000 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8001 record_line (current_subfile, line, addr);
8006 else switch (op_code)
8008 case DW_LNS_extended_op:
8009 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8010 line_ptr += bytes_read;
8011 extended_end = line_ptr + extended_len;
8012 extended_op = read_1_byte (abfd, line_ptr);
8014 switch (extended_op)
8016 case DW_LNE_end_sequence:
8019 case DW_LNE_set_address:
8020 address = read_address (abfd, line_ptr, cu, &bytes_read);
8021 line_ptr += bytes_read;
8022 address += baseaddr;
8024 case DW_LNE_define_file:
8027 unsigned int dir_index, mod_time, length;
8029 cur_file = read_string (abfd, line_ptr, &bytes_read);
8030 line_ptr += bytes_read;
8032 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8033 line_ptr += bytes_read;
8035 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8036 line_ptr += bytes_read;
8038 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8039 line_ptr += bytes_read;
8040 add_file_name (lh, cur_file, dir_index, mod_time, length);
8043 case DW_LNE_set_discriminator:
8044 /* The discriminator is not interesting to the debugger;
8046 line_ptr = extended_end;
8049 complaint (&symfile_complaints,
8050 _("mangled .debug_line section"));
8053 /* Make sure that we parsed the extended op correctly. If e.g.
8054 we expected a different address size than the producer used,
8055 we may have read the wrong number of bytes. */
8056 if (line_ptr != extended_end)
8058 complaint (&symfile_complaints,
8059 _("mangled .debug_line section"));
8064 if (lh->num_file_names < file || file == 0)
8065 dwarf2_debug_line_missing_file_complaint ();
8068 lh->file_names[file - 1].included_p = 1;
8069 if (!decode_for_pst_p && is_stmt)
8071 if (last_subfile != current_subfile)
8073 addr = gdbarch_addr_bits_remove (gdbarch, address);
8075 record_line (last_subfile, 0, addr);
8076 last_subfile = current_subfile;
8078 addr = check_cu_functions (address, cu);
8079 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8080 record_line (current_subfile, line, addr);
8085 case DW_LNS_advance_pc:
8086 address += lh->minimum_instruction_length
8087 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8088 line_ptr += bytes_read;
8090 case DW_LNS_advance_line:
8091 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
8092 line_ptr += bytes_read;
8094 case DW_LNS_set_file:
8096 /* The arrays lh->include_dirs and lh->file_names are
8097 0-based, but the directory and file name numbers in
8098 the statement program are 1-based. */
8099 struct file_entry *fe;
8102 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8103 line_ptr += bytes_read;
8104 if (lh->num_file_names < file || file == 0)
8105 dwarf2_debug_line_missing_file_complaint ();
8108 fe = &lh->file_names[file - 1];
8110 dir = lh->include_dirs[fe->dir_index - 1];
8111 if (!decode_for_pst_p)
8113 last_subfile = current_subfile;
8114 dwarf2_start_subfile (fe->name, dir, comp_dir);
8119 case DW_LNS_set_column:
8120 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8121 line_ptr += bytes_read;
8123 case DW_LNS_negate_stmt:
8124 is_stmt = (!is_stmt);
8126 case DW_LNS_set_basic_block:
8129 /* Add to the address register of the state machine the
8130 address increment value corresponding to special opcode
8131 255. I.e., this value is scaled by the minimum
8132 instruction length since special opcode 255 would have
8133 scaled the the increment. */
8134 case DW_LNS_const_add_pc:
8135 address += (lh->minimum_instruction_length
8136 * ((255 - lh->opcode_base) / lh->line_range));
8138 case DW_LNS_fixed_advance_pc:
8139 address += read_2_bytes (abfd, line_ptr);
8144 /* Unknown standard opcode, ignore it. */
8147 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
8149 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8150 line_ptr += bytes_read;
8155 if (lh->num_file_names < file || file == 0)
8156 dwarf2_debug_line_missing_file_complaint ();
8159 lh->file_names[file - 1].included_p = 1;
8160 if (!decode_for_pst_p)
8162 addr = gdbarch_addr_bits_remove (gdbarch, address);
8163 record_line (current_subfile, 0, addr);
8168 if (decode_for_pst_p)
8172 /* Now that we're done scanning the Line Header Program, we can
8173 create the psymtab of each included file. */
8174 for (file_index = 0; file_index < lh->num_file_names; file_index++)
8175 if (lh->file_names[file_index].included_p == 1)
8177 const struct file_entry fe = lh->file_names [file_index];
8178 char *include_name = fe.name;
8179 char *dir_name = NULL;
8180 char *pst_filename = pst->filename;
8183 dir_name = lh->include_dirs[fe.dir_index - 1];
8185 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
8187 include_name = concat (dir_name, SLASH_STRING,
8188 include_name, (char *)NULL);
8189 make_cleanup (xfree, include_name);
8192 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
8194 pst_filename = concat (pst->dirname, SLASH_STRING,
8195 pst_filename, (char *)NULL);
8196 make_cleanup (xfree, pst_filename);
8199 if (strcmp (include_name, pst_filename) != 0)
8200 dwarf2_create_include_psymtab (include_name, pst, objfile);
8205 /* Make sure a symtab is created for every file, even files
8206 which contain only variables (i.e. no code with associated
8210 struct file_entry *fe;
8212 for (i = 0; i < lh->num_file_names; i++)
8215 fe = &lh->file_names[i];
8217 dir = lh->include_dirs[fe->dir_index - 1];
8218 dwarf2_start_subfile (fe->name, dir, comp_dir);
8220 /* Skip the main file; we don't need it, and it must be
8221 allocated last, so that it will show up before the
8222 non-primary symtabs in the objfile's symtab list. */
8223 if (current_subfile == first_subfile)
8226 if (current_subfile->symtab == NULL)
8227 current_subfile->symtab = allocate_symtab (current_subfile->name,
8229 fe->symtab = current_subfile->symtab;
8234 /* Start a subfile for DWARF. FILENAME is the name of the file and
8235 DIRNAME the name of the source directory which contains FILENAME
8236 or NULL if not known. COMP_DIR is the compilation directory for the
8237 linetable's compilation unit or NULL if not known.
8238 This routine tries to keep line numbers from identical absolute and
8239 relative file names in a common subfile.
8241 Using the `list' example from the GDB testsuite, which resides in
8242 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8243 of /srcdir/list0.c yields the following debugging information for list0.c:
8245 DW_AT_name: /srcdir/list0.c
8246 DW_AT_comp_dir: /compdir
8247 files.files[0].name: list0.h
8248 files.files[0].dir: /srcdir
8249 files.files[1].name: list0.c
8250 files.files[1].dir: /srcdir
8252 The line number information for list0.c has to end up in a single
8253 subfile, so that `break /srcdir/list0.c:1' works as expected.
8254 start_subfile will ensure that this happens provided that we pass the
8255 concatenation of files.files[1].dir and files.files[1].name as the
8259 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
8263 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8264 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8265 second argument to start_subfile. To be consistent, we do the
8266 same here. In order not to lose the line information directory,
8267 we concatenate it to the filename when it makes sense.
8268 Note that the Dwarf3 standard says (speaking of filenames in line
8269 information): ``The directory index is ignored for file names
8270 that represent full path names''. Thus ignoring dirname in the
8271 `else' branch below isn't an issue. */
8273 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
8274 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
8276 fullname = filename;
8278 start_subfile (fullname, comp_dir);
8280 if (fullname != filename)
8285 var_decode_location (struct attribute *attr, struct symbol *sym,
8286 struct dwarf2_cu *cu)
8288 struct objfile *objfile = cu->objfile;
8289 struct comp_unit_head *cu_header = &cu->header;
8291 /* NOTE drow/2003-01-30: There used to be a comment and some special
8292 code here to turn a symbol with DW_AT_external and a
8293 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8294 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8295 with some versions of binutils) where shared libraries could have
8296 relocations against symbols in their debug information - the
8297 minimal symbol would have the right address, but the debug info
8298 would not. It's no longer necessary, because we will explicitly
8299 apply relocations when we read in the debug information now. */
8301 /* A DW_AT_location attribute with no contents indicates that a
8302 variable has been optimized away. */
8303 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
8305 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8309 /* Handle one degenerate form of location expression specially, to
8310 preserve GDB's previous behavior when section offsets are
8311 specified. If this is just a DW_OP_addr then mark this symbol
8314 if (attr_form_is_block (attr)
8315 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
8316 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
8320 SYMBOL_VALUE_ADDRESS (sym) =
8321 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
8322 SYMBOL_CLASS (sym) = LOC_STATIC;
8323 fixup_symbol_section (sym, objfile);
8324 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
8325 SYMBOL_SECTION (sym));
8329 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8330 expression evaluator, and use LOC_COMPUTED only when necessary
8331 (i.e. when the value of a register or memory location is
8332 referenced, or a thread-local block, etc.). Then again, it might
8333 not be worthwhile. I'm assuming that it isn't unless performance
8334 or memory numbers show me otherwise. */
8336 dwarf2_symbol_mark_computed (attr, sym, cu);
8337 SYMBOL_CLASS (sym) = LOC_COMPUTED;
8340 /* Given a pointer to a DWARF information entry, figure out if we need
8341 to make a symbol table entry for it, and if so, create a new entry
8342 and return a pointer to it.
8343 If TYPE is NULL, determine symbol type from the die, otherwise
8344 used the passed type. */
8346 static struct symbol *
8347 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
8349 struct objfile *objfile = cu->objfile;
8350 struct symbol *sym = NULL;
8352 struct attribute *attr = NULL;
8353 struct attribute *attr2 = NULL;
8355 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
8357 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8359 if (die->tag != DW_TAG_namespace)
8360 name = dwarf2_linkage_name (die, cu);
8362 name = TYPE_NAME (type);
8366 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
8367 sizeof (struct symbol));
8368 OBJSTAT (objfile, n_syms++);
8369 memset (sym, 0, sizeof (struct symbol));
8371 /* Cache this symbol's name and the name's demangled form (if any). */
8372 SYMBOL_LANGUAGE (sym) = cu->language;
8373 SYMBOL_SET_NAMES (sym, name, strlen (name), 0, objfile);
8375 /* Default assumptions.
8376 Use the passed type or decode it from the die. */
8377 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8378 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8380 SYMBOL_TYPE (sym) = type;
8382 SYMBOL_TYPE (sym) = die_type (die, cu);
8383 attr = dwarf2_attr (die,
8384 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
8388 SYMBOL_LINE (sym) = DW_UNSND (attr);
8391 attr = dwarf2_attr (die,
8392 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
8396 int file_index = DW_UNSND (attr);
8397 if (cu->line_header == NULL
8398 || file_index > cu->line_header->num_file_names)
8399 complaint (&symfile_complaints,
8400 _("file index out of range"));
8401 else if (file_index > 0)
8403 struct file_entry *fe;
8404 fe = &cu->line_header->file_names[file_index - 1];
8405 SYMBOL_SYMTAB (sym) = fe->symtab;
8412 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
8415 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
8417 SYMBOL_CLASS (sym) = LOC_LABEL;
8419 case DW_TAG_subprogram:
8420 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8422 SYMBOL_CLASS (sym) = LOC_BLOCK;
8423 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8424 if ((attr2 && (DW_UNSND (attr2) != 0))
8425 || cu->language == language_ada)
8427 /* Subprograms marked external are stored as a global symbol.
8428 Ada subprograms, whether marked external or not, are always
8429 stored as a global symbol, because we want to be able to
8430 access them globally. For instance, we want to be able
8431 to break on a nested subprogram without having to
8432 specify the context. */
8433 add_symbol_to_list (sym, &global_symbols);
8437 add_symbol_to_list (sym, cu->list_in_scope);
8440 case DW_TAG_inlined_subroutine:
8441 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8443 SYMBOL_CLASS (sym) = LOC_BLOCK;
8444 SYMBOL_INLINED (sym) = 1;
8445 /* Do not add the symbol to any lists. It will be found via
8446 BLOCK_FUNCTION from the blockvector. */
8448 case DW_TAG_variable:
8449 /* Compilation with minimal debug info may result in variables
8450 with missing type entries. Change the misleading `void' type
8451 to something sensible. */
8452 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
8454 = objfile_type (objfile)->nodebug_data_symbol;
8456 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8459 dwarf2_const_value (attr, sym, cu);
8460 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8461 if (attr2 && (DW_UNSND (attr2) != 0))
8462 add_symbol_to_list (sym, &global_symbols);
8464 add_symbol_to_list (sym, cu->list_in_scope);
8467 attr = dwarf2_attr (die, DW_AT_location, cu);
8470 var_decode_location (attr, sym, cu);
8471 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8472 if (attr2 && (DW_UNSND (attr2) != 0))
8473 add_symbol_to_list (sym, &global_symbols);
8475 add_symbol_to_list (sym, cu->list_in_scope);
8479 /* We do not know the address of this symbol.
8480 If it is an external symbol and we have type information
8481 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8482 The address of the variable will then be determined from
8483 the minimal symbol table whenever the variable is
8485 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8486 if (attr2 && (DW_UNSND (attr2) != 0)
8487 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
8489 struct pending **list_to_add;
8491 /* A variable with DW_AT_external is never static, but it
8492 may be block-scoped. */
8493 list_to_add = (cu->list_in_scope == &file_symbols
8494 ? &global_symbols : cu->list_in_scope);
8496 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8497 add_symbol_to_list (sym, list_to_add);
8499 else if (!die_is_declaration (die, cu))
8501 /* Use the default LOC_OPTIMIZED_OUT class. */
8502 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
8503 add_symbol_to_list (sym, cu->list_in_scope);
8507 case DW_TAG_formal_parameter:
8508 /* If we are inside a function, mark this as an argument. If
8509 not, we might be looking at an argument to an inlined function
8510 when we do not have enough information to show inlined frames;
8511 pretend it's a local variable in that case so that the user can
8513 if (context_stack_depth > 0
8514 && context_stack[context_stack_depth - 1].name != NULL)
8515 SYMBOL_IS_ARGUMENT (sym) = 1;
8516 attr = dwarf2_attr (die, DW_AT_location, cu);
8519 var_decode_location (attr, sym, cu);
8521 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8524 dwarf2_const_value (attr, sym, cu);
8526 add_symbol_to_list (sym, cu->list_in_scope);
8528 case DW_TAG_unspecified_parameters:
8529 /* From varargs functions; gdb doesn't seem to have any
8530 interest in this information, so just ignore it for now.
8533 case DW_TAG_class_type:
8534 case DW_TAG_interface_type:
8535 case DW_TAG_structure_type:
8536 case DW_TAG_union_type:
8537 case DW_TAG_set_type:
8538 case DW_TAG_enumeration_type:
8539 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8540 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
8542 /* Make sure that the symbol includes appropriate enclosing
8543 classes/namespaces in its name. These are calculated in
8544 read_structure_type, and the correct name is saved in
8547 if (cu->language == language_cplus
8548 || cu->language == language_java)
8550 struct type *type = SYMBOL_TYPE (sym);
8552 if (TYPE_TAG_NAME (type) != NULL)
8554 /* FIXME: carlton/2003-11-10: Should this use
8555 SYMBOL_SET_NAMES instead? (The same problem also
8556 arises further down in this function.) */
8557 /* The type's name is already allocated along with
8558 this objfile, so we don't need to duplicate it
8560 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
8565 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8566 really ever be static objects: otherwise, if you try
8567 to, say, break of a class's method and you're in a file
8568 which doesn't mention that class, it won't work unless
8569 the check for all static symbols in lookup_symbol_aux
8570 saves you. See the OtherFileClass tests in
8571 gdb.c++/namespace.exp. */
8573 struct pending **list_to_add;
8575 list_to_add = (cu->list_in_scope == &file_symbols
8576 && (cu->language == language_cplus
8577 || cu->language == language_java)
8578 ? &global_symbols : cu->list_in_scope);
8580 add_symbol_to_list (sym, list_to_add);
8582 /* The semantics of C++ state that "struct foo { ... }" also
8583 defines a typedef for "foo". A Java class declaration also
8584 defines a typedef for the class. */
8585 if (cu->language == language_cplus
8586 || cu->language == language_java
8587 || cu->language == language_ada)
8589 /* The symbol's name is already allocated along with
8590 this objfile, so we don't need to duplicate it for
8592 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
8593 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
8597 case DW_TAG_typedef:
8598 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8599 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8600 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8601 add_symbol_to_list (sym, cu->list_in_scope);
8603 case DW_TAG_base_type:
8604 case DW_TAG_subrange_type:
8605 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8606 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8607 add_symbol_to_list (sym, cu->list_in_scope);
8609 case DW_TAG_enumerator:
8610 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8611 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8614 dwarf2_const_value (attr, sym, cu);
8617 /* NOTE: carlton/2003-11-10: See comment above in the
8618 DW_TAG_class_type, etc. block. */
8620 struct pending **list_to_add;
8622 list_to_add = (cu->list_in_scope == &file_symbols
8623 && (cu->language == language_cplus
8624 || cu->language == language_java)
8625 ? &global_symbols : cu->list_in_scope);
8627 add_symbol_to_list (sym, list_to_add);
8630 case DW_TAG_namespace:
8631 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8632 add_symbol_to_list (sym, &global_symbols);
8635 /* Not a tag we recognize. Hopefully we aren't processing
8636 trash data, but since we must specifically ignore things
8637 we don't recognize, there is nothing else we should do at
8639 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
8640 dwarf_tag_name (die->tag));
8644 /* For the benefit of old versions of GCC, check for anonymous
8645 namespaces based on the demangled name. */
8646 if (!processing_has_namespace_info
8647 && cu->language == language_cplus
8648 && dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu) != NULL)
8649 cp_scan_for_anonymous_namespaces (sym);
8654 /* Copy constant value from an attribute to a symbol. */
8657 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
8658 struct dwarf2_cu *cu)
8660 struct objfile *objfile = cu->objfile;
8661 struct comp_unit_head *cu_header = &cu->header;
8662 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
8663 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
8664 struct dwarf_block *blk;
8669 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
8670 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8671 cu_header->addr_size,
8672 TYPE_LENGTH (SYMBOL_TYPE
8674 SYMBOL_VALUE_BYTES (sym) =
8675 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
8676 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8677 it's body - store_unsigned_integer. */
8678 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
8679 byte_order, DW_ADDR (attr));
8680 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8682 case DW_FORM_string:
8684 /* DW_STRING is already allocated on the obstack, point directly
8686 SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
8687 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8689 case DW_FORM_block1:
8690 case DW_FORM_block2:
8691 case DW_FORM_block4:
8693 blk = DW_BLOCK (attr);
8694 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
8695 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8697 TYPE_LENGTH (SYMBOL_TYPE
8699 SYMBOL_VALUE_BYTES (sym) =
8700 obstack_alloc (&objfile->objfile_obstack, blk->size);
8701 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
8702 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8705 /* The DW_AT_const_value attributes are supposed to carry the
8706 symbol's value "represented as it would be on the target
8707 architecture." By the time we get here, it's already been
8708 converted to host endianness, so we just need to sign- or
8709 zero-extend it as appropriate. */
8711 dwarf2_const_value_data (attr, sym, 8);
8714 dwarf2_const_value_data (attr, sym, 16);
8717 dwarf2_const_value_data (attr, sym, 32);
8720 dwarf2_const_value_data (attr, sym, 64);
8724 SYMBOL_VALUE (sym) = DW_SND (attr);
8725 SYMBOL_CLASS (sym) = LOC_CONST;
8729 SYMBOL_VALUE (sym) = DW_UNSND (attr);
8730 SYMBOL_CLASS (sym) = LOC_CONST;
8734 complaint (&symfile_complaints,
8735 _("unsupported const value attribute form: '%s'"),
8736 dwarf_form_name (attr->form));
8737 SYMBOL_VALUE (sym) = 0;
8738 SYMBOL_CLASS (sym) = LOC_CONST;
8744 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8745 or zero-extend it as appropriate for the symbol's type. */
8747 dwarf2_const_value_data (struct attribute *attr,
8751 LONGEST l = DW_UNSND (attr);
8753 if (bits < sizeof (l) * 8)
8755 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
8756 l &= ((LONGEST) 1 << bits) - 1;
8758 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
8761 SYMBOL_VALUE (sym) = l;
8762 SYMBOL_CLASS (sym) = LOC_CONST;
8766 /* Return the type of the die in question using its DW_AT_type attribute. */
8768 static struct type *
8769 die_type (struct die_info *die, struct dwarf2_cu *cu)
8772 struct attribute *type_attr;
8773 struct die_info *type_die;
8775 type_attr = dwarf2_attr (die, DW_AT_type, cu);
8778 /* A missing DW_AT_type represents a void type. */
8779 return objfile_type (cu->objfile)->builtin_void;
8782 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8784 type = tag_type_to_type (type_die, cu);
8787 dump_die_for_error (type_die);
8788 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8794 /* True iff CU's producer generates GNAT Ada auxiliary information
8795 that allows to find parallel types through that information instead
8796 of having to do expensive parallel lookups by type name. */
8799 need_gnat_info (struct dwarf2_cu *cu)
8801 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
8802 of GNAT produces this auxiliary information, without any indication
8803 that it is produced. Part of enhancing the FSF version of GNAT
8804 to produce that information will be to put in place an indicator
8805 that we can use in order to determine whether the descriptive type
8806 info is available or not. One suggestion that has been made is
8807 to use a new attribute, attached to the CU die. For now, assume
8808 that the descriptive type info is not available. */
8813 /* Return the auxiliary type of the die in question using its
8814 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
8815 attribute is not present. */
8817 static struct type *
8818 die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
8821 struct attribute *type_attr;
8822 struct die_info *type_die;
8824 type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
8828 type_die = follow_die_ref (die, type_attr, &cu);
8829 type = tag_type_to_type (type_die, cu);
8832 dump_die_for_error (type_die);
8833 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8839 /* If DIE has a descriptive_type attribute, then set the TYPE's
8840 descriptive type accordingly. */
8843 set_descriptive_type (struct type *type, struct die_info *die,
8844 struct dwarf2_cu *cu)
8846 struct type *descriptive_type = die_descriptive_type (die, cu);
8848 if (descriptive_type)
8850 ALLOCATE_GNAT_AUX_TYPE (type);
8851 TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type;
8855 /* Return the containing type of the die in question using its
8856 DW_AT_containing_type attribute. */
8858 static struct type *
8859 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
8861 struct type *type = NULL;
8862 struct attribute *type_attr;
8863 struct die_info *type_die = NULL;
8865 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
8868 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8869 type = tag_type_to_type (type_die, cu);
8874 dump_die_for_error (type_die);
8875 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8881 static struct type *
8882 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
8884 struct type *this_type;
8886 this_type = read_type_die (die, cu);
8889 dump_die_for_error (die);
8890 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8896 static struct type *
8897 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
8899 struct type *this_type;
8901 this_type = get_die_type (die, cu);
8907 case DW_TAG_class_type:
8908 case DW_TAG_interface_type:
8909 case DW_TAG_structure_type:
8910 case DW_TAG_union_type:
8911 this_type = read_structure_type (die, cu);
8913 case DW_TAG_enumeration_type:
8914 this_type = read_enumeration_type (die, cu);
8916 case DW_TAG_subprogram:
8917 case DW_TAG_subroutine_type:
8918 case DW_TAG_inlined_subroutine:
8919 this_type = read_subroutine_type (die, cu);
8921 case DW_TAG_array_type:
8922 this_type = read_array_type (die, cu);
8924 case DW_TAG_set_type:
8925 this_type = read_set_type (die, cu);
8927 case DW_TAG_pointer_type:
8928 this_type = read_tag_pointer_type (die, cu);
8930 case DW_TAG_ptr_to_member_type:
8931 this_type = read_tag_ptr_to_member_type (die, cu);
8933 case DW_TAG_reference_type:
8934 this_type = read_tag_reference_type (die, cu);
8936 case DW_TAG_const_type:
8937 this_type = read_tag_const_type (die, cu);
8939 case DW_TAG_volatile_type:
8940 this_type = read_tag_volatile_type (die, cu);
8942 case DW_TAG_string_type:
8943 this_type = read_tag_string_type (die, cu);
8945 case DW_TAG_typedef:
8946 this_type = read_typedef (die, cu);
8948 case DW_TAG_subrange_type:
8949 this_type = read_subrange_type (die, cu);
8951 case DW_TAG_base_type:
8952 this_type = read_base_type (die, cu);
8954 case DW_TAG_unspecified_type:
8955 this_type = read_unspecified_type (die, cu);
8957 case DW_TAG_namespace:
8958 this_type = read_namespace_type (die, cu);
8961 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
8962 dwarf_tag_name (die->tag));
8969 /* Return the name of the namespace/class that DIE is defined within,
8970 or "" if we can't tell. The caller should not xfree the result.
8972 For example, if we're within the method foo() in the following
8982 then determine_prefix on foo's die will return "N::C". */
8985 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
8987 struct die_info *parent, *spec_die;
8988 struct dwarf2_cu *spec_cu;
8989 struct type *parent_type;
8991 if (cu->language != language_cplus
8992 && cu->language != language_java)
8995 /* We have to be careful in the presence of DW_AT_specification.
8996 For example, with GCC 3.4, given the code
9000 // Definition of N::foo.
9004 then we'll have a tree of DIEs like this:
9006 1: DW_TAG_compile_unit
9007 2: DW_TAG_namespace // N
9008 3: DW_TAG_subprogram // declaration of N::foo
9009 4: DW_TAG_subprogram // definition of N::foo
9010 DW_AT_specification // refers to die #3
9012 Thus, when processing die #4, we have to pretend that we're in
9013 the context of its DW_AT_specification, namely the contex of die
9016 spec_die = die_specification (die, &spec_cu);
9017 if (spec_die == NULL)
9018 parent = die->parent;
9021 parent = spec_die->parent;
9028 switch (parent->tag)
9030 case DW_TAG_namespace:
9031 parent_type = read_type_die (parent, cu);
9032 /* We give a name to even anonymous namespaces. */
9033 return TYPE_TAG_NAME (parent_type);
9034 case DW_TAG_class_type:
9035 case DW_TAG_interface_type:
9036 case DW_TAG_structure_type:
9037 case DW_TAG_union_type:
9038 parent_type = read_type_die (parent, cu);
9039 if (TYPE_TAG_NAME (parent_type) != NULL)
9040 return TYPE_TAG_NAME (parent_type);
9042 /* An anonymous structure is only allowed non-static data
9043 members; no typedefs, no member functions, et cetera.
9044 So it does not need a prefix. */
9047 return determine_prefix (parent, cu);
9051 /* Return a newly-allocated string formed by concatenating PREFIX and
9052 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9053 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9054 perform an obconcat, otherwise allocate storage for the result. The CU argument
9055 is used to determine the language and hence, the appropriate separator. */
9057 #define MAX_SEP_LEN 2 /* sizeof ("::") */
9060 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
9061 struct dwarf2_cu *cu)
9065 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
9067 else if (cu->language == language_java)
9079 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
9080 strcpy (retval, prefix);
9081 strcat (retval, sep);
9082 strcat (retval, suffix);
9087 /* We have an obstack. */
9088 return obconcat (obs, prefix, sep, suffix);
9092 /* Return sibling of die, NULL if no sibling. */
9094 static struct die_info *
9095 sibling_die (struct die_info *die)
9097 return die->sibling;
9100 /* Get linkage name of a die, return NULL if not found. */
9103 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
9105 struct attribute *attr;
9107 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
9108 if (attr && DW_STRING (attr))
9109 return DW_STRING (attr);
9110 return dwarf2_name (die, cu);
9113 /* Get name of a die, return NULL if not found. */
9116 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
9117 struct obstack *obstack)
9119 if (name && cu->language == language_cplus)
9121 char *canon_name = cp_canonicalize_string (name);
9123 if (canon_name != NULL)
9125 if (strcmp (canon_name, name) != 0)
9126 name = obsavestring (canon_name, strlen (canon_name),
9135 /* Get name of a die, return NULL if not found. */
9138 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
9140 struct attribute *attr;
9142 attr = dwarf2_attr (die, DW_AT_name, cu);
9143 if (!attr || !DW_STRING (attr))
9148 case DW_TAG_compile_unit:
9149 /* Compilation units have a DW_AT_name that is a filename, not
9150 a source language identifier. */
9151 case DW_TAG_enumeration_type:
9152 case DW_TAG_enumerator:
9153 /* These tags always have simple identifiers already; no need
9154 to canonicalize them. */
9155 return DW_STRING (attr);
9157 if (!DW_STRING_IS_CANONICAL (attr))
9160 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
9161 &cu->objfile->objfile_obstack);
9162 DW_STRING_IS_CANONICAL (attr) = 1;
9164 return DW_STRING (attr);
9168 /* Return the die that this die in an extension of, or NULL if there
9169 is none. *EXT_CU is the CU containing DIE on input, and the CU
9170 containing the return value on output. */
9172 static struct die_info *
9173 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
9175 struct attribute *attr;
9177 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
9181 return follow_die_ref (die, attr, ext_cu);
9184 /* Convert a DIE tag into its string name. */
9187 dwarf_tag_name (unsigned tag)
9191 case DW_TAG_padding:
9192 return "DW_TAG_padding";
9193 case DW_TAG_array_type:
9194 return "DW_TAG_array_type";
9195 case DW_TAG_class_type:
9196 return "DW_TAG_class_type";
9197 case DW_TAG_entry_point:
9198 return "DW_TAG_entry_point";
9199 case DW_TAG_enumeration_type:
9200 return "DW_TAG_enumeration_type";
9201 case DW_TAG_formal_parameter:
9202 return "DW_TAG_formal_parameter";
9203 case DW_TAG_imported_declaration:
9204 return "DW_TAG_imported_declaration";
9206 return "DW_TAG_label";
9207 case DW_TAG_lexical_block:
9208 return "DW_TAG_lexical_block";
9210 return "DW_TAG_member";
9211 case DW_TAG_pointer_type:
9212 return "DW_TAG_pointer_type";
9213 case DW_TAG_reference_type:
9214 return "DW_TAG_reference_type";
9215 case DW_TAG_compile_unit:
9216 return "DW_TAG_compile_unit";
9217 case DW_TAG_string_type:
9218 return "DW_TAG_string_type";
9219 case DW_TAG_structure_type:
9220 return "DW_TAG_structure_type";
9221 case DW_TAG_subroutine_type:
9222 return "DW_TAG_subroutine_type";
9223 case DW_TAG_typedef:
9224 return "DW_TAG_typedef";
9225 case DW_TAG_union_type:
9226 return "DW_TAG_union_type";
9227 case DW_TAG_unspecified_parameters:
9228 return "DW_TAG_unspecified_parameters";
9229 case DW_TAG_variant:
9230 return "DW_TAG_variant";
9231 case DW_TAG_common_block:
9232 return "DW_TAG_common_block";
9233 case DW_TAG_common_inclusion:
9234 return "DW_TAG_common_inclusion";
9235 case DW_TAG_inheritance:
9236 return "DW_TAG_inheritance";
9237 case DW_TAG_inlined_subroutine:
9238 return "DW_TAG_inlined_subroutine";
9240 return "DW_TAG_module";
9241 case DW_TAG_ptr_to_member_type:
9242 return "DW_TAG_ptr_to_member_type";
9243 case DW_TAG_set_type:
9244 return "DW_TAG_set_type";
9245 case DW_TAG_subrange_type:
9246 return "DW_TAG_subrange_type";
9247 case DW_TAG_with_stmt:
9248 return "DW_TAG_with_stmt";
9249 case DW_TAG_access_declaration:
9250 return "DW_TAG_access_declaration";
9251 case DW_TAG_base_type:
9252 return "DW_TAG_base_type";
9253 case DW_TAG_catch_block:
9254 return "DW_TAG_catch_block";
9255 case DW_TAG_const_type:
9256 return "DW_TAG_const_type";
9257 case DW_TAG_constant:
9258 return "DW_TAG_constant";
9259 case DW_TAG_enumerator:
9260 return "DW_TAG_enumerator";
9261 case DW_TAG_file_type:
9262 return "DW_TAG_file_type";
9264 return "DW_TAG_friend";
9265 case DW_TAG_namelist:
9266 return "DW_TAG_namelist";
9267 case DW_TAG_namelist_item:
9268 return "DW_TAG_namelist_item";
9269 case DW_TAG_packed_type:
9270 return "DW_TAG_packed_type";
9271 case DW_TAG_subprogram:
9272 return "DW_TAG_subprogram";
9273 case DW_TAG_template_type_param:
9274 return "DW_TAG_template_type_param";
9275 case DW_TAG_template_value_param:
9276 return "DW_TAG_template_value_param";
9277 case DW_TAG_thrown_type:
9278 return "DW_TAG_thrown_type";
9279 case DW_TAG_try_block:
9280 return "DW_TAG_try_block";
9281 case DW_TAG_variant_part:
9282 return "DW_TAG_variant_part";
9283 case DW_TAG_variable:
9284 return "DW_TAG_variable";
9285 case DW_TAG_volatile_type:
9286 return "DW_TAG_volatile_type";
9287 case DW_TAG_dwarf_procedure:
9288 return "DW_TAG_dwarf_procedure";
9289 case DW_TAG_restrict_type:
9290 return "DW_TAG_restrict_type";
9291 case DW_TAG_interface_type:
9292 return "DW_TAG_interface_type";
9293 case DW_TAG_namespace:
9294 return "DW_TAG_namespace";
9295 case DW_TAG_imported_module:
9296 return "DW_TAG_imported_module";
9297 case DW_TAG_unspecified_type:
9298 return "DW_TAG_unspecified_type";
9299 case DW_TAG_partial_unit:
9300 return "DW_TAG_partial_unit";
9301 case DW_TAG_imported_unit:
9302 return "DW_TAG_imported_unit";
9303 case DW_TAG_condition:
9304 return "DW_TAG_condition";
9305 case DW_TAG_shared_type:
9306 return "DW_TAG_shared_type";
9307 case DW_TAG_type_unit:
9308 return "DW_TAG_type_unit";
9309 case DW_TAG_MIPS_loop:
9310 return "DW_TAG_MIPS_loop";
9311 case DW_TAG_HP_array_descriptor:
9312 return "DW_TAG_HP_array_descriptor";
9313 case DW_TAG_format_label:
9314 return "DW_TAG_format_label";
9315 case DW_TAG_function_template:
9316 return "DW_TAG_function_template";
9317 case DW_TAG_class_template:
9318 return "DW_TAG_class_template";
9319 case DW_TAG_GNU_BINCL:
9320 return "DW_TAG_GNU_BINCL";
9321 case DW_TAG_GNU_EINCL:
9322 return "DW_TAG_GNU_EINCL";
9323 case DW_TAG_upc_shared_type:
9324 return "DW_TAG_upc_shared_type";
9325 case DW_TAG_upc_strict_type:
9326 return "DW_TAG_upc_strict_type";
9327 case DW_TAG_upc_relaxed_type:
9328 return "DW_TAG_upc_relaxed_type";
9329 case DW_TAG_PGI_kanji_type:
9330 return "DW_TAG_PGI_kanji_type";
9331 case DW_TAG_PGI_interface_block:
9332 return "DW_TAG_PGI_interface_block";
9334 return "DW_TAG_<unknown>";
9338 /* Convert a DWARF attribute code into its string name. */
9341 dwarf_attr_name (unsigned attr)
9346 return "DW_AT_sibling";
9347 case DW_AT_location:
9348 return "DW_AT_location";
9350 return "DW_AT_name";
9351 case DW_AT_ordering:
9352 return "DW_AT_ordering";
9353 case DW_AT_subscr_data:
9354 return "DW_AT_subscr_data";
9355 case DW_AT_byte_size:
9356 return "DW_AT_byte_size";
9357 case DW_AT_bit_offset:
9358 return "DW_AT_bit_offset";
9359 case DW_AT_bit_size:
9360 return "DW_AT_bit_size";
9361 case DW_AT_element_list:
9362 return "DW_AT_element_list";
9363 case DW_AT_stmt_list:
9364 return "DW_AT_stmt_list";
9366 return "DW_AT_low_pc";
9368 return "DW_AT_high_pc";
9369 case DW_AT_language:
9370 return "DW_AT_language";
9372 return "DW_AT_member";
9374 return "DW_AT_discr";
9375 case DW_AT_discr_value:
9376 return "DW_AT_discr_value";
9377 case DW_AT_visibility:
9378 return "DW_AT_visibility";
9380 return "DW_AT_import";
9381 case DW_AT_string_length:
9382 return "DW_AT_string_length";
9383 case DW_AT_common_reference:
9384 return "DW_AT_common_reference";
9385 case DW_AT_comp_dir:
9386 return "DW_AT_comp_dir";
9387 case DW_AT_const_value:
9388 return "DW_AT_const_value";
9389 case DW_AT_containing_type:
9390 return "DW_AT_containing_type";
9391 case DW_AT_default_value:
9392 return "DW_AT_default_value";
9394 return "DW_AT_inline";
9395 case DW_AT_is_optional:
9396 return "DW_AT_is_optional";
9397 case DW_AT_lower_bound:
9398 return "DW_AT_lower_bound";
9399 case DW_AT_producer:
9400 return "DW_AT_producer";
9401 case DW_AT_prototyped:
9402 return "DW_AT_prototyped";
9403 case DW_AT_return_addr:
9404 return "DW_AT_return_addr";
9405 case DW_AT_start_scope:
9406 return "DW_AT_start_scope";
9407 case DW_AT_bit_stride:
9408 return "DW_AT_bit_stride";
9409 case DW_AT_upper_bound:
9410 return "DW_AT_upper_bound";
9411 case DW_AT_abstract_origin:
9412 return "DW_AT_abstract_origin";
9413 case DW_AT_accessibility:
9414 return "DW_AT_accessibility";
9415 case DW_AT_address_class:
9416 return "DW_AT_address_class";
9417 case DW_AT_artificial:
9418 return "DW_AT_artificial";
9419 case DW_AT_base_types:
9420 return "DW_AT_base_types";
9421 case DW_AT_calling_convention:
9422 return "DW_AT_calling_convention";
9424 return "DW_AT_count";
9425 case DW_AT_data_member_location:
9426 return "DW_AT_data_member_location";
9427 case DW_AT_decl_column:
9428 return "DW_AT_decl_column";
9429 case DW_AT_decl_file:
9430 return "DW_AT_decl_file";
9431 case DW_AT_decl_line:
9432 return "DW_AT_decl_line";
9433 case DW_AT_declaration:
9434 return "DW_AT_declaration";
9435 case DW_AT_discr_list:
9436 return "DW_AT_discr_list";
9437 case DW_AT_encoding:
9438 return "DW_AT_encoding";
9439 case DW_AT_external:
9440 return "DW_AT_external";
9441 case DW_AT_frame_base:
9442 return "DW_AT_frame_base";
9444 return "DW_AT_friend";
9445 case DW_AT_identifier_case:
9446 return "DW_AT_identifier_case";
9447 case DW_AT_macro_info:
9448 return "DW_AT_macro_info";
9449 case DW_AT_namelist_items:
9450 return "DW_AT_namelist_items";
9451 case DW_AT_priority:
9452 return "DW_AT_priority";
9454 return "DW_AT_segment";
9455 case DW_AT_specification:
9456 return "DW_AT_specification";
9457 case DW_AT_static_link:
9458 return "DW_AT_static_link";
9460 return "DW_AT_type";
9461 case DW_AT_use_location:
9462 return "DW_AT_use_location";
9463 case DW_AT_variable_parameter:
9464 return "DW_AT_variable_parameter";
9465 case DW_AT_virtuality:
9466 return "DW_AT_virtuality";
9467 case DW_AT_vtable_elem_location:
9468 return "DW_AT_vtable_elem_location";
9469 /* DWARF 3 values. */
9470 case DW_AT_allocated:
9471 return "DW_AT_allocated";
9472 case DW_AT_associated:
9473 return "DW_AT_associated";
9474 case DW_AT_data_location:
9475 return "DW_AT_data_location";
9476 case DW_AT_byte_stride:
9477 return "DW_AT_byte_stride";
9478 case DW_AT_entry_pc:
9479 return "DW_AT_entry_pc";
9480 case DW_AT_use_UTF8:
9481 return "DW_AT_use_UTF8";
9482 case DW_AT_extension:
9483 return "DW_AT_extension";
9485 return "DW_AT_ranges";
9486 case DW_AT_trampoline:
9487 return "DW_AT_trampoline";
9488 case DW_AT_call_column:
9489 return "DW_AT_call_column";
9490 case DW_AT_call_file:
9491 return "DW_AT_call_file";
9492 case DW_AT_call_line:
9493 return "DW_AT_call_line";
9494 case DW_AT_description:
9495 return "DW_AT_description";
9496 case DW_AT_binary_scale:
9497 return "DW_AT_binary_scale";
9498 case DW_AT_decimal_scale:
9499 return "DW_AT_decimal_scale";
9501 return "DW_AT_small";
9502 case DW_AT_decimal_sign:
9503 return "DW_AT_decimal_sign";
9504 case DW_AT_digit_count:
9505 return "DW_AT_digit_count";
9506 case DW_AT_picture_string:
9507 return "DW_AT_picture_string";
9509 return "DW_AT_mutable";
9510 case DW_AT_threads_scaled:
9511 return "DW_AT_threads_scaled";
9512 case DW_AT_explicit:
9513 return "DW_AT_explicit";
9514 case DW_AT_object_pointer:
9515 return "DW_AT_object_pointer";
9516 case DW_AT_endianity:
9517 return "DW_AT_endianity";
9518 case DW_AT_elemental:
9519 return "DW_AT_elemental";
9521 return "DW_AT_pure";
9522 case DW_AT_recursive:
9523 return "DW_AT_recursive";
9524 /* DWARF 4 values. */
9525 case DW_AT_signature:
9526 return "DW_AT_signature";
9527 /* SGI/MIPS extensions. */
9528 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9529 case DW_AT_MIPS_fde:
9530 return "DW_AT_MIPS_fde";
9532 case DW_AT_MIPS_loop_begin:
9533 return "DW_AT_MIPS_loop_begin";
9534 case DW_AT_MIPS_tail_loop_begin:
9535 return "DW_AT_MIPS_tail_loop_begin";
9536 case DW_AT_MIPS_epilog_begin:
9537 return "DW_AT_MIPS_epilog_begin";
9538 case DW_AT_MIPS_loop_unroll_factor:
9539 return "DW_AT_MIPS_loop_unroll_factor";
9540 case DW_AT_MIPS_software_pipeline_depth:
9541 return "DW_AT_MIPS_software_pipeline_depth";
9542 case DW_AT_MIPS_linkage_name:
9543 return "DW_AT_MIPS_linkage_name";
9544 case DW_AT_MIPS_stride:
9545 return "DW_AT_MIPS_stride";
9546 case DW_AT_MIPS_abstract_name:
9547 return "DW_AT_MIPS_abstract_name";
9548 case DW_AT_MIPS_clone_origin:
9549 return "DW_AT_MIPS_clone_origin";
9550 case DW_AT_MIPS_has_inlines:
9551 return "DW_AT_MIPS_has_inlines";
9552 /* HP extensions. */
9553 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9554 case DW_AT_HP_block_index:
9555 return "DW_AT_HP_block_index";
9557 case DW_AT_HP_unmodifiable:
9558 return "DW_AT_HP_unmodifiable";
9559 case DW_AT_HP_actuals_stmt_list:
9560 return "DW_AT_HP_actuals_stmt_list";
9561 case DW_AT_HP_proc_per_section:
9562 return "DW_AT_HP_proc_per_section";
9563 case DW_AT_HP_raw_data_ptr:
9564 return "DW_AT_HP_raw_data_ptr";
9565 case DW_AT_HP_pass_by_reference:
9566 return "DW_AT_HP_pass_by_reference";
9567 case DW_AT_HP_opt_level:
9568 return "DW_AT_HP_opt_level";
9569 case DW_AT_HP_prof_version_id:
9570 return "DW_AT_HP_prof_version_id";
9571 case DW_AT_HP_opt_flags:
9572 return "DW_AT_HP_opt_flags";
9573 case DW_AT_HP_cold_region_low_pc:
9574 return "DW_AT_HP_cold_region_low_pc";
9575 case DW_AT_HP_cold_region_high_pc:
9576 return "DW_AT_HP_cold_region_high_pc";
9577 case DW_AT_HP_all_variables_modifiable:
9578 return "DW_AT_HP_all_variables_modifiable";
9579 case DW_AT_HP_linkage_name:
9580 return "DW_AT_HP_linkage_name";
9581 case DW_AT_HP_prof_flags:
9582 return "DW_AT_HP_prof_flags";
9583 /* GNU extensions. */
9584 case DW_AT_sf_names:
9585 return "DW_AT_sf_names";
9586 case DW_AT_src_info:
9587 return "DW_AT_src_info";
9588 case DW_AT_mac_info:
9589 return "DW_AT_mac_info";
9590 case DW_AT_src_coords:
9591 return "DW_AT_src_coords";
9592 case DW_AT_body_begin:
9593 return "DW_AT_body_begin";
9594 case DW_AT_body_end:
9595 return "DW_AT_body_end";
9596 case DW_AT_GNU_vector:
9597 return "DW_AT_GNU_vector";
9598 /* VMS extensions. */
9599 case DW_AT_VMS_rtnbeg_pd_address:
9600 return "DW_AT_VMS_rtnbeg_pd_address";
9601 /* UPC extension. */
9602 case DW_AT_upc_threads_scaled:
9603 return "DW_AT_upc_threads_scaled";
9604 /* PGI (STMicroelectronics) extensions. */
9605 case DW_AT_PGI_lbase:
9606 return "DW_AT_PGI_lbase";
9607 case DW_AT_PGI_soffset:
9608 return "DW_AT_PGI_soffset";
9609 case DW_AT_PGI_lstride:
9610 return "DW_AT_PGI_lstride";
9612 return "DW_AT_<unknown>";
9616 /* Convert a DWARF value form code into its string name. */
9619 dwarf_form_name (unsigned form)
9624 return "DW_FORM_addr";
9625 case DW_FORM_block2:
9626 return "DW_FORM_block2";
9627 case DW_FORM_block4:
9628 return "DW_FORM_block4";
9630 return "DW_FORM_data2";
9632 return "DW_FORM_data4";
9634 return "DW_FORM_data8";
9635 case DW_FORM_string:
9636 return "DW_FORM_string";
9638 return "DW_FORM_block";
9639 case DW_FORM_block1:
9640 return "DW_FORM_block1";
9642 return "DW_FORM_data1";
9644 return "DW_FORM_flag";
9646 return "DW_FORM_sdata";
9648 return "DW_FORM_strp";
9650 return "DW_FORM_udata";
9651 case DW_FORM_ref_addr:
9652 return "DW_FORM_ref_addr";
9654 return "DW_FORM_ref1";
9656 return "DW_FORM_ref2";
9658 return "DW_FORM_ref4";
9660 return "DW_FORM_ref8";
9661 case DW_FORM_ref_udata:
9662 return "DW_FORM_ref_udata";
9663 case DW_FORM_indirect:
9664 return "DW_FORM_indirect";
9665 case DW_FORM_sec_offset:
9666 return "DW_FORM_sec_offset";
9667 case DW_FORM_exprloc:
9668 return "DW_FORM_exprloc";
9669 case DW_FORM_flag_present:
9670 return "DW_FORM_flag_present";
9672 return "DW_FORM_sig8";
9674 return "DW_FORM_<unknown>";
9678 /* Convert a DWARF stack opcode into its string name. */
9681 dwarf_stack_op_name (unsigned op)
9686 return "DW_OP_addr";
9688 return "DW_OP_deref";
9690 return "DW_OP_const1u";
9692 return "DW_OP_const1s";
9694 return "DW_OP_const2u";
9696 return "DW_OP_const2s";
9698 return "DW_OP_const4u";
9700 return "DW_OP_const4s";
9702 return "DW_OP_const8u";
9704 return "DW_OP_const8s";
9706 return "DW_OP_constu";
9708 return "DW_OP_consts";
9712 return "DW_OP_drop";
9714 return "DW_OP_over";
9716 return "DW_OP_pick";
9718 return "DW_OP_swap";
9722 return "DW_OP_xderef";
9730 return "DW_OP_minus";
9742 return "DW_OP_plus";
9743 case DW_OP_plus_uconst:
9744 return "DW_OP_plus_uconst";
9750 return "DW_OP_shra";
9768 return "DW_OP_skip";
9770 return "DW_OP_lit0";
9772 return "DW_OP_lit1";
9774 return "DW_OP_lit2";
9776 return "DW_OP_lit3";
9778 return "DW_OP_lit4";
9780 return "DW_OP_lit5";
9782 return "DW_OP_lit6";
9784 return "DW_OP_lit7";
9786 return "DW_OP_lit8";
9788 return "DW_OP_lit9";
9790 return "DW_OP_lit10";
9792 return "DW_OP_lit11";
9794 return "DW_OP_lit12";
9796 return "DW_OP_lit13";
9798 return "DW_OP_lit14";
9800 return "DW_OP_lit15";
9802 return "DW_OP_lit16";
9804 return "DW_OP_lit17";
9806 return "DW_OP_lit18";
9808 return "DW_OP_lit19";
9810 return "DW_OP_lit20";
9812 return "DW_OP_lit21";
9814 return "DW_OP_lit22";
9816 return "DW_OP_lit23";
9818 return "DW_OP_lit24";
9820 return "DW_OP_lit25";
9822 return "DW_OP_lit26";
9824 return "DW_OP_lit27";
9826 return "DW_OP_lit28";
9828 return "DW_OP_lit29";
9830 return "DW_OP_lit30";
9832 return "DW_OP_lit31";
9834 return "DW_OP_reg0";
9836 return "DW_OP_reg1";
9838 return "DW_OP_reg2";
9840 return "DW_OP_reg3";
9842 return "DW_OP_reg4";
9844 return "DW_OP_reg5";
9846 return "DW_OP_reg6";
9848 return "DW_OP_reg7";
9850 return "DW_OP_reg8";
9852 return "DW_OP_reg9";
9854 return "DW_OP_reg10";
9856 return "DW_OP_reg11";
9858 return "DW_OP_reg12";
9860 return "DW_OP_reg13";
9862 return "DW_OP_reg14";
9864 return "DW_OP_reg15";
9866 return "DW_OP_reg16";
9868 return "DW_OP_reg17";
9870 return "DW_OP_reg18";
9872 return "DW_OP_reg19";
9874 return "DW_OP_reg20";
9876 return "DW_OP_reg21";
9878 return "DW_OP_reg22";
9880 return "DW_OP_reg23";
9882 return "DW_OP_reg24";
9884 return "DW_OP_reg25";
9886 return "DW_OP_reg26";
9888 return "DW_OP_reg27";
9890 return "DW_OP_reg28";
9892 return "DW_OP_reg29";
9894 return "DW_OP_reg30";
9896 return "DW_OP_reg31";
9898 return "DW_OP_breg0";
9900 return "DW_OP_breg1";
9902 return "DW_OP_breg2";
9904 return "DW_OP_breg3";
9906 return "DW_OP_breg4";
9908 return "DW_OP_breg5";
9910 return "DW_OP_breg6";
9912 return "DW_OP_breg7";
9914 return "DW_OP_breg8";
9916 return "DW_OP_breg9";
9918 return "DW_OP_breg10";
9920 return "DW_OP_breg11";
9922 return "DW_OP_breg12";
9924 return "DW_OP_breg13";
9926 return "DW_OP_breg14";
9928 return "DW_OP_breg15";
9930 return "DW_OP_breg16";
9932 return "DW_OP_breg17";
9934 return "DW_OP_breg18";
9936 return "DW_OP_breg19";
9938 return "DW_OP_breg20";
9940 return "DW_OP_breg21";
9942 return "DW_OP_breg22";
9944 return "DW_OP_breg23";
9946 return "DW_OP_breg24";
9948 return "DW_OP_breg25";
9950 return "DW_OP_breg26";
9952 return "DW_OP_breg27";
9954 return "DW_OP_breg28";
9956 return "DW_OP_breg29";
9958 return "DW_OP_breg30";
9960 return "DW_OP_breg31";
9962 return "DW_OP_regx";
9964 return "DW_OP_fbreg";
9966 return "DW_OP_bregx";
9968 return "DW_OP_piece";
9969 case DW_OP_deref_size:
9970 return "DW_OP_deref_size";
9971 case DW_OP_xderef_size:
9972 return "DW_OP_xderef_size";
9975 /* DWARF 3 extensions. */
9976 case DW_OP_push_object_address:
9977 return "DW_OP_push_object_address";
9979 return "DW_OP_call2";
9981 return "DW_OP_call4";
9982 case DW_OP_call_ref:
9983 return "DW_OP_call_ref";
9984 /* GNU extensions. */
9985 case DW_OP_form_tls_address:
9986 return "DW_OP_form_tls_address";
9987 case DW_OP_call_frame_cfa:
9988 return "DW_OP_call_frame_cfa";
9989 case DW_OP_bit_piece:
9990 return "DW_OP_bit_piece";
9991 case DW_OP_GNU_push_tls_address:
9992 return "DW_OP_GNU_push_tls_address";
9993 case DW_OP_GNU_uninit:
9994 return "DW_OP_GNU_uninit";
9995 /* HP extensions. */
9996 case DW_OP_HP_is_value:
9997 return "DW_OP_HP_is_value";
9998 case DW_OP_HP_fltconst4:
9999 return "DW_OP_HP_fltconst4";
10000 case DW_OP_HP_fltconst8:
10001 return "DW_OP_HP_fltconst8";
10002 case DW_OP_HP_mod_range:
10003 return "DW_OP_HP_mod_range";
10004 case DW_OP_HP_unmod_range:
10005 return "DW_OP_HP_unmod_range";
10007 return "DW_OP_HP_tls";
10009 return "OP_<unknown>";
10014 dwarf_bool_name (unsigned mybool)
10022 /* Convert a DWARF type code into its string name. */
10025 dwarf_type_encoding_name (unsigned enc)
10030 return "DW_ATE_void";
10031 case DW_ATE_address:
10032 return "DW_ATE_address";
10033 case DW_ATE_boolean:
10034 return "DW_ATE_boolean";
10035 case DW_ATE_complex_float:
10036 return "DW_ATE_complex_float";
10038 return "DW_ATE_float";
10039 case DW_ATE_signed:
10040 return "DW_ATE_signed";
10041 case DW_ATE_signed_char:
10042 return "DW_ATE_signed_char";
10043 case DW_ATE_unsigned:
10044 return "DW_ATE_unsigned";
10045 case DW_ATE_unsigned_char:
10046 return "DW_ATE_unsigned_char";
10048 case DW_ATE_imaginary_float:
10049 return "DW_ATE_imaginary_float";
10050 case DW_ATE_packed_decimal:
10051 return "DW_ATE_packed_decimal";
10052 case DW_ATE_numeric_string:
10053 return "DW_ATE_numeric_string";
10054 case DW_ATE_edited:
10055 return "DW_ATE_edited";
10056 case DW_ATE_signed_fixed:
10057 return "DW_ATE_signed_fixed";
10058 case DW_ATE_unsigned_fixed:
10059 return "DW_ATE_unsigned_fixed";
10060 case DW_ATE_decimal_float:
10061 return "DW_ATE_decimal_float";
10062 /* HP extensions. */
10063 case DW_ATE_HP_float80:
10064 return "DW_ATE_HP_float80";
10065 case DW_ATE_HP_complex_float80:
10066 return "DW_ATE_HP_complex_float80";
10067 case DW_ATE_HP_float128:
10068 return "DW_ATE_HP_float128";
10069 case DW_ATE_HP_complex_float128:
10070 return "DW_ATE_HP_complex_float128";
10071 case DW_ATE_HP_floathpintel:
10072 return "DW_ATE_HP_floathpintel";
10073 case DW_ATE_HP_imaginary_float80:
10074 return "DW_ATE_HP_imaginary_float80";
10075 case DW_ATE_HP_imaginary_float128:
10076 return "DW_ATE_HP_imaginary_float128";
10078 return "DW_ATE_<unknown>";
10082 /* Convert a DWARF call frame info operation to its string name. */
10086 dwarf_cfi_name (unsigned cfi_opc)
10090 case DW_CFA_advance_loc:
10091 return "DW_CFA_advance_loc";
10092 case DW_CFA_offset:
10093 return "DW_CFA_offset";
10094 case DW_CFA_restore:
10095 return "DW_CFA_restore";
10097 return "DW_CFA_nop";
10098 case DW_CFA_set_loc:
10099 return "DW_CFA_set_loc";
10100 case DW_CFA_advance_loc1:
10101 return "DW_CFA_advance_loc1";
10102 case DW_CFA_advance_loc2:
10103 return "DW_CFA_advance_loc2";
10104 case DW_CFA_advance_loc4:
10105 return "DW_CFA_advance_loc4";
10106 case DW_CFA_offset_extended:
10107 return "DW_CFA_offset_extended";
10108 case DW_CFA_restore_extended:
10109 return "DW_CFA_restore_extended";
10110 case DW_CFA_undefined:
10111 return "DW_CFA_undefined";
10112 case DW_CFA_same_value:
10113 return "DW_CFA_same_value";
10114 case DW_CFA_register:
10115 return "DW_CFA_register";
10116 case DW_CFA_remember_state:
10117 return "DW_CFA_remember_state";
10118 case DW_CFA_restore_state:
10119 return "DW_CFA_restore_state";
10120 case DW_CFA_def_cfa:
10121 return "DW_CFA_def_cfa";
10122 case DW_CFA_def_cfa_register:
10123 return "DW_CFA_def_cfa_register";
10124 case DW_CFA_def_cfa_offset:
10125 return "DW_CFA_def_cfa_offset";
10127 case DW_CFA_def_cfa_expression:
10128 return "DW_CFA_def_cfa_expression";
10129 case DW_CFA_expression:
10130 return "DW_CFA_expression";
10131 case DW_CFA_offset_extended_sf:
10132 return "DW_CFA_offset_extended_sf";
10133 case DW_CFA_def_cfa_sf:
10134 return "DW_CFA_def_cfa_sf";
10135 case DW_CFA_def_cfa_offset_sf:
10136 return "DW_CFA_def_cfa_offset_sf";
10137 case DW_CFA_val_offset:
10138 return "DW_CFA_val_offset";
10139 case DW_CFA_val_offset_sf:
10140 return "DW_CFA_val_offset_sf";
10141 case DW_CFA_val_expression:
10142 return "DW_CFA_val_expression";
10143 /* SGI/MIPS specific. */
10144 case DW_CFA_MIPS_advance_loc8:
10145 return "DW_CFA_MIPS_advance_loc8";
10146 /* GNU extensions. */
10147 case DW_CFA_GNU_window_save:
10148 return "DW_CFA_GNU_window_save";
10149 case DW_CFA_GNU_args_size:
10150 return "DW_CFA_GNU_args_size";
10151 case DW_CFA_GNU_negative_offset_extended:
10152 return "DW_CFA_GNU_negative_offset_extended";
10154 return "DW_CFA_<unknown>";
10160 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
10164 print_spaces (indent, f);
10165 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
10166 dwarf_tag_name (die->tag), die->abbrev, die->offset);
10168 if (die->parent != NULL)
10170 print_spaces (indent, f);
10171 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
10172 die->parent->offset);
10175 print_spaces (indent, f);
10176 fprintf_unfiltered (f, " has children: %s\n",
10177 dwarf_bool_name (die->child != NULL));
10179 print_spaces (indent, f);
10180 fprintf_unfiltered (f, " attributes:\n");
10182 for (i = 0; i < die->num_attrs; ++i)
10184 print_spaces (indent, f);
10185 fprintf_unfiltered (f, " %s (%s) ",
10186 dwarf_attr_name (die->attrs[i].name),
10187 dwarf_form_name (die->attrs[i].form));
10189 switch (die->attrs[i].form)
10191 case DW_FORM_ref_addr:
10193 fprintf_unfiltered (f, "address: ");
10194 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
10196 case DW_FORM_block2:
10197 case DW_FORM_block4:
10198 case DW_FORM_block:
10199 case DW_FORM_block1:
10200 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
10205 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
10206 (long) (DW_ADDR (&die->attrs[i])));
10208 case DW_FORM_data1:
10209 case DW_FORM_data2:
10210 case DW_FORM_data4:
10211 case DW_FORM_data8:
10212 case DW_FORM_udata:
10213 case DW_FORM_sdata:
10214 fprintf_unfiltered (f, "constant: %s",
10215 pulongest (DW_UNSND (&die->attrs[i])));
10218 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
10219 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
10220 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
10222 fprintf_unfiltered (f, "signatured type, offset: unknown");
10224 case DW_FORM_string:
10226 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
10227 DW_STRING (&die->attrs[i])
10228 ? DW_STRING (&die->attrs[i]) : "",
10229 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
10232 if (DW_UNSND (&die->attrs[i]))
10233 fprintf_unfiltered (f, "flag: TRUE");
10235 fprintf_unfiltered (f, "flag: FALSE");
10237 case DW_FORM_indirect:
10238 /* the reader will have reduced the indirect form to
10239 the "base form" so this form should not occur */
10240 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
10243 fprintf_unfiltered (f, "unsupported attribute form: %d.",
10244 die->attrs[i].form);
10247 fprintf_unfiltered (f, "\n");
10252 dump_die_for_error (struct die_info *die)
10254 dump_die_shallow (gdb_stderr, 0, die);
10258 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
10260 int indent = level * 4;
10262 gdb_assert (die != NULL);
10264 if (level >= max_level)
10267 dump_die_shallow (f, indent, die);
10269 if (die->child != NULL)
10271 print_spaces (indent, f);
10272 fprintf_unfiltered (f, " Children:");
10273 if (level + 1 < max_level)
10275 fprintf_unfiltered (f, "\n");
10276 dump_die_1 (f, level + 1, max_level, die->child);
10280 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
10284 if (die->sibling != NULL && level > 0)
10286 dump_die_1 (f, level, max_level, die->sibling);
10290 /* This is called from the pdie macro in gdbinit.in.
10291 It's not static so gcc will keep a copy callable from gdb. */
10294 dump_die (struct die_info *die, int max_level)
10296 dump_die_1 (gdb_stdlog, 0, max_level, die);
10300 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
10304 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
10310 is_ref_attr (struct attribute *attr)
10312 switch (attr->form)
10314 case DW_FORM_ref_addr:
10319 case DW_FORM_ref_udata:
10326 static unsigned int
10327 dwarf2_get_ref_die_offset (struct attribute *attr)
10329 if (is_ref_attr (attr))
10330 return DW_ADDR (attr);
10332 complaint (&symfile_complaints,
10333 _("unsupported die ref attribute form: '%s'"),
10334 dwarf_form_name (attr->form));
10338 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10339 * the value held by the attribute is not constant. */
10342 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
10344 if (attr->form == DW_FORM_sdata)
10345 return DW_SND (attr);
10346 else if (attr->form == DW_FORM_udata
10347 || attr->form == DW_FORM_data1
10348 || attr->form == DW_FORM_data2
10349 || attr->form == DW_FORM_data4
10350 || attr->form == DW_FORM_data8)
10351 return DW_UNSND (attr);
10354 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
10355 dwarf_form_name (attr->form));
10356 return default_value;
10360 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10361 unit and add it to our queue.
10362 The result is non-zero if PER_CU was queued, otherwise the result is zero
10363 meaning either PER_CU is already queued or it is already loaded. */
10366 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
10367 struct dwarf2_per_cu_data *per_cu)
10369 /* Mark the dependence relation so that we don't flush PER_CU
10371 dwarf2_add_dependence (this_cu, per_cu);
10373 /* If it's already on the queue, we have nothing to do. */
10374 if (per_cu->queued)
10377 /* If the compilation unit is already loaded, just mark it as
10379 if (per_cu->cu != NULL)
10381 per_cu->cu->last_used = 0;
10385 /* Add it to the queue. */
10386 queue_comp_unit (per_cu, this_cu->objfile);
10391 /* Follow reference or signature attribute ATTR of SRC_DIE.
10392 On entry *REF_CU is the CU of SRC_DIE.
10393 On exit *REF_CU is the CU of the result. */
10395 static struct die_info *
10396 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
10397 struct dwarf2_cu **ref_cu)
10399 struct die_info *die;
10401 if (is_ref_attr (attr))
10402 die = follow_die_ref (src_die, attr, ref_cu);
10403 else if (attr->form == DW_FORM_sig8)
10404 die = follow_die_sig (src_die, attr, ref_cu);
10407 dump_die_for_error (src_die);
10408 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10409 (*ref_cu)->objfile->name);
10415 /* Follow reference attribute ATTR of SRC_DIE.
10416 On entry *REF_CU is the CU of SRC_DIE.
10417 On exit *REF_CU is the CU of the result. */
10419 static struct die_info *
10420 follow_die_ref (struct die_info *src_die, struct attribute *attr,
10421 struct dwarf2_cu **ref_cu)
10423 struct die_info *die;
10424 unsigned int offset;
10425 struct die_info temp_die;
10426 struct dwarf2_cu *target_cu, *cu = *ref_cu;
10428 gdb_assert (cu->per_cu != NULL);
10430 offset = dwarf2_get_ref_die_offset (attr);
10432 if (cu->per_cu->from_debug_types)
10434 /* .debug_types CUs cannot reference anything outside their CU.
10435 If they need to, they have to reference a signatured type via
10437 if (! offset_in_cu_p (&cu->header, offset))
10441 else if (! offset_in_cu_p (&cu->header, offset))
10443 struct dwarf2_per_cu_data *per_cu;
10444 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
10446 /* If necessary, add it to the queue and load its DIEs. */
10447 if (maybe_queue_comp_unit (cu, per_cu))
10448 load_full_comp_unit (per_cu, cu->objfile);
10450 target_cu = per_cu->cu;
10455 *ref_cu = target_cu;
10456 temp_die.offset = offset;
10457 die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
10463 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10464 "at 0x%x [in module %s]"),
10465 offset, src_die->offset, cu->objfile->name);
10468 /* Follow the signature attribute ATTR in SRC_DIE.
10469 On entry *REF_CU is the CU of SRC_DIE.
10470 On exit *REF_CU is the CU of the result. */
10472 static struct die_info *
10473 follow_die_sig (struct die_info *src_die, struct attribute *attr,
10474 struct dwarf2_cu **ref_cu)
10476 struct objfile *objfile = (*ref_cu)->objfile;
10477 struct die_info temp_die;
10478 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
10479 struct dwarf2_cu *sig_cu;
10480 struct die_info *die;
10482 /* sig_type will be NULL if the signatured type is missing from
10484 if (sig_type == NULL)
10485 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10486 "at 0x%x [in module %s]"),
10487 src_die->offset, objfile->name);
10489 /* If necessary, add it to the queue and load its DIEs. */
10491 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
10492 read_signatured_type (objfile, sig_type);
10494 gdb_assert (sig_type->per_cu.cu != NULL);
10496 sig_cu = sig_type->per_cu.cu;
10497 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
10498 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
10505 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10506 "at 0x%x [in module %s]"),
10507 sig_type->type_offset, src_die->offset, objfile->name);
10510 /* Given an offset of a signatured type, return its signatured_type. */
10512 static struct signatured_type *
10513 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
10515 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
10516 unsigned int length, initial_length_size;
10517 unsigned int sig_offset;
10518 struct signatured_type find_entry, *type_sig;
10520 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
10521 sig_offset = (initial_length_size
10523 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
10524 + 1 /*address_size*/);
10525 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
10526 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
10528 /* This is only used to lookup previously recorded types.
10529 If we didn't find it, it's our bug. */
10530 gdb_assert (type_sig != NULL);
10531 gdb_assert (offset == type_sig->offset);
10536 /* Read in signatured type at OFFSET and build its CU and die(s). */
10539 read_signatured_type_at_offset (struct objfile *objfile,
10540 unsigned int offset)
10542 struct signatured_type *type_sig;
10544 /* We have the section offset, but we need the signature to do the
10545 hash table lookup. */
10546 type_sig = lookup_signatured_type_at_offset (objfile, offset);
10548 gdb_assert (type_sig->per_cu.cu == NULL);
10550 read_signatured_type (objfile, type_sig);
10552 gdb_assert (type_sig->per_cu.cu != NULL);
10555 /* Read in a signatured type and build its CU and DIEs. */
10558 read_signatured_type (struct objfile *objfile,
10559 struct signatured_type *type_sig)
10561 gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
10562 struct die_reader_specs reader_specs;
10563 struct dwarf2_cu *cu;
10564 ULONGEST signature;
10565 struct cleanup *back_to, *free_cu_cleanup;
10566 struct attribute *attr;
10568 gdb_assert (type_sig->per_cu.cu == NULL);
10570 cu = xmalloc (sizeof (struct dwarf2_cu));
10571 memset (cu, 0, sizeof (struct dwarf2_cu));
10572 obstack_init (&cu->comp_unit_obstack);
10573 cu->objfile = objfile;
10574 type_sig->per_cu.cu = cu;
10575 cu->per_cu = &type_sig->per_cu;
10577 /* If an error occurs while loading, release our storage. */
10578 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
10580 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
10581 types_ptr, objfile->obfd);
10582 gdb_assert (signature == type_sig->signature);
10585 = htab_create_alloc_ex (cu->header.length / 12,
10589 &cu->comp_unit_obstack,
10590 hashtab_obstack_allocate,
10591 dummy_obstack_deallocate);
10593 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
10594 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
10596 init_cu_die_reader (&reader_specs, cu);
10598 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
10601 /* We try not to read any attributes in this function, because not
10602 all objfiles needed for references have been loaded yet, and symbol
10603 table processing isn't initialized. But we have to set the CU language,
10604 or we won't be able to build types correctly. */
10605 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
10607 set_cu_language (DW_UNSND (attr), cu);
10609 set_cu_language (language_minimal, cu);
10611 do_cleanups (back_to);
10613 /* We've successfully allocated this compilation unit. Let our caller
10614 clean it up when finished with it. */
10615 discard_cleanups (free_cu_cleanup);
10617 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
10618 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
10621 /* Decode simple location descriptions.
10622 Given a pointer to a dwarf block that defines a location, compute
10623 the location and return the value.
10625 NOTE drow/2003-11-18: This function is called in two situations
10626 now: for the address of static or global variables (partial symbols
10627 only) and for offsets into structures which are expected to be
10628 (more or less) constant. The partial symbol case should go away,
10629 and only the constant case should remain. That will let this
10630 function complain more accurately. A few special modes are allowed
10631 without complaint for global variables (for instance, global
10632 register values and thread-local values).
10634 A location description containing no operations indicates that the
10635 object is optimized out. The return value is 0 for that case.
10636 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10637 callers will only want a very basic result and this can become a
10640 Note that stack[0] is unused except as a default error return.
10641 Note that stack overflow is not yet handled. */
10644 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
10646 struct objfile *objfile = cu->objfile;
10647 struct comp_unit_head *cu_header = &cu->header;
10649 int size = blk->size;
10650 gdb_byte *data = blk->data;
10651 CORE_ADDR stack[64];
10653 unsigned int bytes_read, unsnd;
10697 stack[++stacki] = op - DW_OP_lit0;
10732 stack[++stacki] = op - DW_OP_reg0;
10734 dwarf2_complex_location_expr_complaint ();
10738 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10740 stack[++stacki] = unsnd;
10742 dwarf2_complex_location_expr_complaint ();
10746 stack[++stacki] = read_address (objfile->obfd, &data[i],
10751 case DW_OP_const1u:
10752 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
10756 case DW_OP_const1s:
10757 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
10761 case DW_OP_const2u:
10762 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
10766 case DW_OP_const2s:
10767 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
10771 case DW_OP_const4u:
10772 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
10776 case DW_OP_const4s:
10777 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
10782 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
10788 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
10793 stack[stacki + 1] = stack[stacki];
10798 stack[stacki - 1] += stack[stacki];
10802 case DW_OP_plus_uconst:
10803 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10808 stack[stacki - 1] -= stack[stacki];
10813 /* If we're not the last op, then we definitely can't encode
10814 this using GDB's address_class enum. This is valid for partial
10815 global symbols, although the variable's address will be bogus
10818 dwarf2_complex_location_expr_complaint ();
10821 case DW_OP_GNU_push_tls_address:
10822 /* The top of the stack has the offset from the beginning
10823 of the thread control block at which the variable is located. */
10824 /* Nothing should follow this operator, so the top of stack would
10826 /* This is valid for partial global symbols, but the variable's
10827 address will be bogus in the psymtab. */
10829 dwarf2_complex_location_expr_complaint ();
10832 case DW_OP_GNU_uninit:
10836 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
10837 dwarf_stack_op_name (op));
10838 return (stack[stacki]);
10841 return (stack[stacki]);
10844 /* memory allocation interface */
10846 static struct dwarf_block *
10847 dwarf_alloc_block (struct dwarf2_cu *cu)
10849 struct dwarf_block *blk;
10851 blk = (struct dwarf_block *)
10852 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
10856 static struct abbrev_info *
10857 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
10859 struct abbrev_info *abbrev;
10861 abbrev = (struct abbrev_info *)
10862 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
10863 memset (abbrev, 0, sizeof (struct abbrev_info));
10867 static struct die_info *
10868 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
10870 struct die_info *die;
10871 size_t size = sizeof (struct die_info);
10874 size += (num_attrs - 1) * sizeof (struct attribute);
10876 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
10877 memset (die, 0, sizeof (struct die_info));
10882 /* Macro support. */
10885 /* Return the full name of file number I in *LH's file name table.
10886 Use COMP_DIR as the name of the current directory of the
10887 compilation. The result is allocated using xmalloc; the caller is
10888 responsible for freeing it. */
10890 file_full_name (int file, struct line_header *lh, const char *comp_dir)
10892 /* Is the file number a valid index into the line header's file name
10893 table? Remember that file numbers start with one, not zero. */
10894 if (1 <= file && file <= lh->num_file_names)
10896 struct file_entry *fe = &lh->file_names[file - 1];
10898 if (IS_ABSOLUTE_PATH (fe->name))
10899 return xstrdup (fe->name);
10907 dir = lh->include_dirs[fe->dir_index - 1];
10913 dir_len = strlen (dir);
10914 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
10915 strcpy (full_name, dir);
10916 full_name[dir_len] = '/';
10917 strcpy (full_name + dir_len + 1, fe->name);
10921 return xstrdup (fe->name);
10926 /* The compiler produced a bogus file number. We can at least
10927 record the macro definitions made in the file, even if we
10928 won't be able to find the file by name. */
10929 char fake_name[80];
10930 sprintf (fake_name, "<bad macro file number %d>", file);
10932 complaint (&symfile_complaints,
10933 _("bad file number in macro information (%d)"),
10936 return xstrdup (fake_name);
10941 static struct macro_source_file *
10942 macro_start_file (int file, int line,
10943 struct macro_source_file *current_file,
10944 const char *comp_dir,
10945 struct line_header *lh, struct objfile *objfile)
10947 /* The full name of this source file. */
10948 char *full_name = file_full_name (file, lh, comp_dir);
10950 /* We don't create a macro table for this compilation unit
10951 at all until we actually get a filename. */
10952 if (! pending_macros)
10953 pending_macros = new_macro_table (&objfile->objfile_obstack,
10954 objfile->macro_cache);
10956 if (! current_file)
10957 /* If we have no current file, then this must be the start_file
10958 directive for the compilation unit's main source file. */
10959 current_file = macro_set_main (pending_macros, full_name);
10961 current_file = macro_include (current_file, line, full_name);
10965 return current_file;
10969 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10970 followed by a null byte. */
10972 copy_string (const char *buf, int len)
10974 char *s = xmalloc (len + 1);
10975 memcpy (s, buf, len);
10982 static const char *
10983 consume_improper_spaces (const char *p, const char *body)
10987 complaint (&symfile_complaints,
10988 _("macro definition contains spaces in formal argument list:\n`%s'"),
11000 parse_macro_definition (struct macro_source_file *file, int line,
11005 /* The body string takes one of two forms. For object-like macro
11006 definitions, it should be:
11008 <macro name> " " <definition>
11010 For function-like macro definitions, it should be:
11012 <macro name> "() " <definition>
11014 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11016 Spaces may appear only where explicitly indicated, and in the
11019 The Dwarf 2 spec says that an object-like macro's name is always
11020 followed by a space, but versions of GCC around March 2002 omit
11021 the space when the macro's definition is the empty string.
11023 The Dwarf 2 spec says that there should be no spaces between the
11024 formal arguments in a function-like macro's formal argument list,
11025 but versions of GCC around March 2002 include spaces after the
11029 /* Find the extent of the macro name. The macro name is terminated
11030 by either a space or null character (for an object-like macro) or
11031 an opening paren (for a function-like macro). */
11032 for (p = body; *p; p++)
11033 if (*p == ' ' || *p == '(')
11036 if (*p == ' ' || *p == '\0')
11038 /* It's an object-like macro. */
11039 int name_len = p - body;
11040 char *name = copy_string (body, name_len);
11041 const char *replacement;
11044 replacement = body + name_len + 1;
11047 dwarf2_macro_malformed_definition_complaint (body);
11048 replacement = body + name_len;
11051 macro_define_object (file, line, name, replacement);
11055 else if (*p == '(')
11057 /* It's a function-like macro. */
11058 char *name = copy_string (body, p - body);
11061 char **argv = xmalloc (argv_size * sizeof (*argv));
11065 p = consume_improper_spaces (p, body);
11067 /* Parse the formal argument list. */
11068 while (*p && *p != ')')
11070 /* Find the extent of the current argument name. */
11071 const char *arg_start = p;
11073 while (*p && *p != ',' && *p != ')' && *p != ' ')
11076 if (! *p || p == arg_start)
11077 dwarf2_macro_malformed_definition_complaint (body);
11080 /* Make sure argv has room for the new argument. */
11081 if (argc >= argv_size)
11084 argv = xrealloc (argv, argv_size * sizeof (*argv));
11087 argv[argc++] = copy_string (arg_start, p - arg_start);
11090 p = consume_improper_spaces (p, body);
11092 /* Consume the comma, if present. */
11097 p = consume_improper_spaces (p, body);
11106 /* Perfectly formed definition, no complaints. */
11107 macro_define_function (file, line, name,
11108 argc, (const char **) argv,
11110 else if (*p == '\0')
11112 /* Complain, but do define it. */
11113 dwarf2_macro_malformed_definition_complaint (body);
11114 macro_define_function (file, line, name,
11115 argc, (const char **) argv,
11119 /* Just complain. */
11120 dwarf2_macro_malformed_definition_complaint (body);
11123 /* Just complain. */
11124 dwarf2_macro_malformed_definition_complaint (body);
11130 for (i = 0; i < argc; i++)
11136 dwarf2_macro_malformed_definition_complaint (body);
11141 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
11142 char *comp_dir, bfd *abfd,
11143 struct dwarf2_cu *cu)
11145 gdb_byte *mac_ptr, *mac_end;
11146 struct macro_source_file *current_file = 0;
11147 enum dwarf_macinfo_record_type macinfo_type;
11148 int at_commandline;
11150 if (dwarf2_per_objfile->macinfo.buffer == NULL)
11152 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
11156 /* First pass: Find the name of the base filename.
11157 This filename is needed in order to process all macros whose definition
11158 (or undefinition) comes from the command line. These macros are defined
11159 before the first DW_MACINFO_start_file entry, and yet still need to be
11160 associated to the base file.
11162 To determine the base file name, we scan the macro definitions until we
11163 reach the first DW_MACINFO_start_file entry. We then initialize
11164 CURRENT_FILE accordingly so that any macro definition found before the
11165 first DW_MACINFO_start_file can still be associated to the base file. */
11167 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11168 mac_end = dwarf2_per_objfile->macinfo.buffer
11169 + dwarf2_per_objfile->macinfo.size;
11173 /* Do we at least have room for a macinfo type byte? */
11174 if (mac_ptr >= mac_end)
11176 /* Complaint is printed during the second pass as GDB will probably
11177 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11181 macinfo_type = read_1_byte (abfd, mac_ptr);
11184 switch (macinfo_type)
11186 /* A zero macinfo type indicates the end of the macro
11191 case DW_MACINFO_define:
11192 case DW_MACINFO_undef:
11193 /* Only skip the data by MAC_PTR. */
11195 unsigned int bytes_read;
11197 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11198 mac_ptr += bytes_read;
11199 read_string (abfd, mac_ptr, &bytes_read);
11200 mac_ptr += bytes_read;
11204 case DW_MACINFO_start_file:
11206 unsigned int bytes_read;
11209 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11210 mac_ptr += bytes_read;
11211 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11212 mac_ptr += bytes_read;
11214 current_file = macro_start_file (file, line, current_file, comp_dir,
11219 case DW_MACINFO_end_file:
11220 /* No data to skip by MAC_PTR. */
11223 case DW_MACINFO_vendor_ext:
11224 /* Only skip the data by MAC_PTR. */
11226 unsigned int bytes_read;
11228 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11229 mac_ptr += bytes_read;
11230 read_string (abfd, mac_ptr, &bytes_read);
11231 mac_ptr += bytes_read;
11238 } while (macinfo_type != 0 && current_file == NULL);
11240 /* Second pass: Process all entries.
11242 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11243 command-line macro definitions/undefinitions. This flag is unset when we
11244 reach the first DW_MACINFO_start_file entry. */
11246 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11248 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11249 GDB is still reading the definitions from command line. First
11250 DW_MACINFO_start_file will need to be ignored as it was already executed
11251 to create CURRENT_FILE for the main source holding also the command line
11252 definitions. On first met DW_MACINFO_start_file this flag is reset to
11253 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11255 at_commandline = 1;
11259 /* Do we at least have room for a macinfo type byte? */
11260 if (mac_ptr >= mac_end)
11262 dwarf2_macros_too_long_complaint ();
11266 macinfo_type = read_1_byte (abfd, mac_ptr);
11269 switch (macinfo_type)
11271 /* A zero macinfo type indicates the end of the macro
11276 case DW_MACINFO_define:
11277 case DW_MACINFO_undef:
11279 unsigned int bytes_read;
11283 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11284 mac_ptr += bytes_read;
11285 body = read_string (abfd, mac_ptr, &bytes_read);
11286 mac_ptr += bytes_read;
11288 if (! current_file)
11290 /* DWARF violation as no main source is present. */
11291 complaint (&symfile_complaints,
11292 _("debug info with no main source gives macro %s "
11294 macinfo_type == DW_MACINFO_define ?
11296 macinfo_type == DW_MACINFO_undef ?
11297 _("undefinition") :
11298 _("something-or-other"), line, body);
11301 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11302 complaint (&symfile_complaints,
11303 _("debug info gives %s macro %s with %s line %d: %s"),
11304 at_commandline ? _("command-line") : _("in-file"),
11305 macinfo_type == DW_MACINFO_define ?
11307 macinfo_type == DW_MACINFO_undef ?
11308 _("undefinition") :
11309 _("something-or-other"),
11310 line == 0 ? _("zero") : _("non-zero"), line, body);
11312 if (macinfo_type == DW_MACINFO_define)
11313 parse_macro_definition (current_file, line, body);
11314 else if (macinfo_type == DW_MACINFO_undef)
11315 macro_undef (current_file, line, body);
11319 case DW_MACINFO_start_file:
11321 unsigned int bytes_read;
11324 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11325 mac_ptr += bytes_read;
11326 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11327 mac_ptr += bytes_read;
11329 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11330 complaint (&symfile_complaints,
11331 _("debug info gives source %d included "
11332 "from %s at %s line %d"),
11333 file, at_commandline ? _("command-line") : _("file"),
11334 line == 0 ? _("zero") : _("non-zero"), line);
11336 if (at_commandline)
11338 /* This DW_MACINFO_start_file was executed in the pass one. */
11339 at_commandline = 0;
11342 current_file = macro_start_file (file, line,
11343 current_file, comp_dir,
11348 case DW_MACINFO_end_file:
11349 if (! current_file)
11350 complaint (&symfile_complaints,
11351 _("macro debug info has an unmatched `close_file' directive"));
11354 current_file = current_file->included_by;
11355 if (! current_file)
11357 enum dwarf_macinfo_record_type next_type;
11359 /* GCC circa March 2002 doesn't produce the zero
11360 type byte marking the end of the compilation
11361 unit. Complain if it's not there, but exit no
11364 /* Do we at least have room for a macinfo type byte? */
11365 if (mac_ptr >= mac_end)
11367 dwarf2_macros_too_long_complaint ();
11371 /* We don't increment mac_ptr here, so this is just
11373 next_type = read_1_byte (abfd, mac_ptr);
11374 if (next_type != 0)
11375 complaint (&symfile_complaints,
11376 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11383 case DW_MACINFO_vendor_ext:
11385 unsigned int bytes_read;
11389 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11390 mac_ptr += bytes_read;
11391 string = read_string (abfd, mac_ptr, &bytes_read);
11392 mac_ptr += bytes_read;
11394 /* We don't recognize any vendor extensions. */
11398 } while (macinfo_type != 0);
11401 /* Check if the attribute's form is a DW_FORM_block*
11402 if so return true else false. */
11404 attr_form_is_block (struct attribute *attr)
11406 return (attr == NULL ? 0 :
11407 attr->form == DW_FORM_block1
11408 || attr->form == DW_FORM_block2
11409 || attr->form == DW_FORM_block4
11410 || attr->form == DW_FORM_block);
11413 /* Return non-zero if ATTR's value is a section offset --- classes
11414 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11415 You may use DW_UNSND (attr) to retrieve such offsets.
11417 Section 7.5.4, "Attribute Encodings", explains that no attribute
11418 may have a value that belongs to more than one of these classes; it
11419 would be ambiguous if we did, because we use the same forms for all
11422 attr_form_is_section_offset (struct attribute *attr)
11424 return (attr->form == DW_FORM_data4
11425 || attr->form == DW_FORM_data8);
11429 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11430 zero otherwise. When this function returns true, you can apply
11431 dwarf2_get_attr_constant_value to it.
11433 However, note that for some attributes you must check
11434 attr_form_is_section_offset before using this test. DW_FORM_data4
11435 and DW_FORM_data8 are members of both the constant class, and of
11436 the classes that contain offsets into other debug sections
11437 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11438 that, if an attribute's can be either a constant or one of the
11439 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11440 taken as section offsets, not constants. */
11442 attr_form_is_constant (struct attribute *attr)
11444 switch (attr->form)
11446 case DW_FORM_sdata:
11447 case DW_FORM_udata:
11448 case DW_FORM_data1:
11449 case DW_FORM_data2:
11450 case DW_FORM_data4:
11451 case DW_FORM_data8:
11459 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
11460 struct dwarf2_cu *cu)
11462 if (attr_form_is_section_offset (attr)
11463 /* ".debug_loc" may not exist at all, or the offset may be outside
11464 the section. If so, fall through to the complaint in the
11466 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
11468 struct dwarf2_loclist_baton *baton;
11470 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11471 sizeof (struct dwarf2_loclist_baton));
11472 baton->per_cu = cu->per_cu;
11473 gdb_assert (baton->per_cu);
11475 /* We don't know how long the location list is, but make sure we
11476 don't run off the edge of the section. */
11477 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
11478 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
11479 baton->base_address = cu->base_address;
11480 if (cu->base_known == 0)
11481 complaint (&symfile_complaints,
11482 _("Location list used without specifying the CU base address."));
11484 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
11485 SYMBOL_LOCATION_BATON (sym) = baton;
11489 struct dwarf2_locexpr_baton *baton;
11491 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11492 sizeof (struct dwarf2_locexpr_baton));
11493 baton->per_cu = cu->per_cu;
11494 gdb_assert (baton->per_cu);
11496 if (attr_form_is_block (attr))
11498 /* Note that we're just copying the block's data pointer
11499 here, not the actual data. We're still pointing into the
11500 info_buffer for SYM's objfile; right now we never release
11501 that buffer, but when we do clean up properly this may
11503 baton->size = DW_BLOCK (attr)->size;
11504 baton->data = DW_BLOCK (attr)->data;
11508 dwarf2_invalid_attrib_class_complaint ("location description",
11509 SYMBOL_NATURAL_NAME (sym));
11511 baton->data = NULL;
11514 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
11515 SYMBOL_LOCATION_BATON (sym) = baton;
11519 /* Return the OBJFILE associated with the compilation unit CU. */
11522 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
11524 struct objfile *objfile = per_cu->psymtab->objfile;
11526 /* Return the master objfile, so that we can report and look up the
11527 correct file containing this variable. */
11528 if (objfile->separate_debug_objfile_backlink)
11529 objfile = objfile->separate_debug_objfile_backlink;
11534 /* Return the address size given in the compilation unit header for CU. */
11537 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
11540 return per_cu->cu->header.addr_size;
11543 /* If the CU is not currently read in, we re-read its header. */
11544 struct objfile *objfile = per_cu->psymtab->objfile;
11545 struct dwarf2_per_objfile *per_objfile
11546 = objfile_data (objfile, dwarf2_objfile_data_key);
11547 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
11549 struct comp_unit_head cu_header;
11550 memset (&cu_header, 0, sizeof cu_header);
11551 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
11552 return cu_header.addr_size;
11556 /* Locate the .debug_info compilation unit from CU's objfile which contains
11557 the DIE at OFFSET. Raises an error on failure. */
11559 static struct dwarf2_per_cu_data *
11560 dwarf2_find_containing_comp_unit (unsigned int offset,
11561 struct objfile *objfile)
11563 struct dwarf2_per_cu_data *this_cu;
11567 high = dwarf2_per_objfile->n_comp_units - 1;
11570 int mid = low + (high - low) / 2;
11571 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
11576 gdb_assert (low == high);
11577 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
11580 error (_("Dwarf Error: could not find partial DIE containing "
11581 "offset 0x%lx [in module %s]"),
11582 (long) offset, bfd_get_filename (objfile->obfd));
11584 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
11585 return dwarf2_per_objfile->all_comp_units[low-1];
11589 this_cu = dwarf2_per_objfile->all_comp_units[low];
11590 if (low == dwarf2_per_objfile->n_comp_units - 1
11591 && offset >= this_cu->offset + this_cu->length)
11592 error (_("invalid dwarf2 offset %u"), offset);
11593 gdb_assert (offset < this_cu->offset + this_cu->length);
11598 /* Locate the compilation unit from OBJFILE which is located at exactly
11599 OFFSET. Raises an error on failure. */
11601 static struct dwarf2_per_cu_data *
11602 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
11604 struct dwarf2_per_cu_data *this_cu;
11605 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
11606 if (this_cu->offset != offset)
11607 error (_("no compilation unit with offset %u."), offset);
11611 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11613 static struct dwarf2_cu *
11614 alloc_one_comp_unit (struct objfile *objfile)
11616 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
11617 cu->objfile = objfile;
11618 obstack_init (&cu->comp_unit_obstack);
11622 /* Release one cached compilation unit, CU. We unlink it from the tree
11623 of compilation units, but we don't remove it from the read_in_chain;
11624 the caller is responsible for that.
11625 NOTE: DATA is a void * because this function is also used as a
11626 cleanup routine. */
11629 free_one_comp_unit (void *data)
11631 struct dwarf2_cu *cu = data;
11633 if (cu->per_cu != NULL)
11634 cu->per_cu->cu = NULL;
11637 obstack_free (&cu->comp_unit_obstack, NULL);
11642 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11643 when we're finished with it. We can't free the pointer itself, but be
11644 sure to unlink it from the cache. Also release any associated storage
11645 and perform cache maintenance.
11647 Only used during partial symbol parsing. */
11650 free_stack_comp_unit (void *data)
11652 struct dwarf2_cu *cu = data;
11654 obstack_free (&cu->comp_unit_obstack, NULL);
11655 cu->partial_dies = NULL;
11657 if (cu->per_cu != NULL)
11659 /* This compilation unit is on the stack in our caller, so we
11660 should not xfree it. Just unlink it. */
11661 cu->per_cu->cu = NULL;
11664 /* If we had a per-cu pointer, then we may have other compilation
11665 units loaded, so age them now. */
11666 age_cached_comp_units ();
11670 /* Free all cached compilation units. */
11673 free_cached_comp_units (void *data)
11675 struct dwarf2_per_cu_data *per_cu, **last_chain;
11677 per_cu = dwarf2_per_objfile->read_in_chain;
11678 last_chain = &dwarf2_per_objfile->read_in_chain;
11679 while (per_cu != NULL)
11681 struct dwarf2_per_cu_data *next_cu;
11683 next_cu = per_cu->cu->read_in_chain;
11685 free_one_comp_unit (per_cu->cu);
11686 *last_chain = next_cu;
11692 /* Increase the age counter on each cached compilation unit, and free
11693 any that are too old. */
11696 age_cached_comp_units (void)
11698 struct dwarf2_per_cu_data *per_cu, **last_chain;
11700 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
11701 per_cu = dwarf2_per_objfile->read_in_chain;
11702 while (per_cu != NULL)
11704 per_cu->cu->last_used ++;
11705 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
11706 dwarf2_mark (per_cu->cu);
11707 per_cu = per_cu->cu->read_in_chain;
11710 per_cu = dwarf2_per_objfile->read_in_chain;
11711 last_chain = &dwarf2_per_objfile->read_in_chain;
11712 while (per_cu != NULL)
11714 struct dwarf2_per_cu_data *next_cu;
11716 next_cu = per_cu->cu->read_in_chain;
11718 if (!per_cu->cu->mark)
11720 free_one_comp_unit (per_cu->cu);
11721 *last_chain = next_cu;
11724 last_chain = &per_cu->cu->read_in_chain;
11730 /* Remove a single compilation unit from the cache. */
11733 free_one_cached_comp_unit (void *target_cu)
11735 struct dwarf2_per_cu_data *per_cu, **last_chain;
11737 per_cu = dwarf2_per_objfile->read_in_chain;
11738 last_chain = &dwarf2_per_objfile->read_in_chain;
11739 while (per_cu != NULL)
11741 struct dwarf2_per_cu_data *next_cu;
11743 next_cu = per_cu->cu->read_in_chain;
11745 if (per_cu->cu == target_cu)
11747 free_one_comp_unit (per_cu->cu);
11748 *last_chain = next_cu;
11752 last_chain = &per_cu->cu->read_in_chain;
11758 /* Release all extra memory associated with OBJFILE. */
11761 dwarf2_free_objfile (struct objfile *objfile)
11763 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
11765 if (dwarf2_per_objfile == NULL)
11768 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11769 free_cached_comp_units (NULL);
11771 /* Everything else should be on the objfile obstack. */
11774 /* A pair of DIE offset and GDB type pointer. We store these
11775 in a hash table separate from the DIEs, and preserve them
11776 when the DIEs are flushed out of cache. */
11778 struct dwarf2_offset_and_type
11780 unsigned int offset;
11784 /* Hash function for a dwarf2_offset_and_type. */
11787 offset_and_type_hash (const void *item)
11789 const struct dwarf2_offset_and_type *ofs = item;
11790 return ofs->offset;
11793 /* Equality function for a dwarf2_offset_and_type. */
11796 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
11798 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
11799 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
11800 return ofs_lhs->offset == ofs_rhs->offset;
11803 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11804 table if necessary. For convenience, return TYPE. */
11806 static struct type *
11807 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
11809 struct dwarf2_offset_and_type **slot, ofs;
11811 /* For Ada types, make sure that the gnat-specific data is always
11812 initialized (if not already set). There are a few types where
11813 we should not be doing so, because the type-specific area is
11814 already used to hold some other piece of info (eg: TYPE_CODE_FLT
11815 where the type-specific area is used to store the floatformat).
11816 But this is not a problem, because the gnat-specific information
11817 is actually not needed for these types. */
11818 if (need_gnat_info (cu)
11819 && TYPE_CODE (type) != TYPE_CODE_FUNC
11820 && TYPE_CODE (type) != TYPE_CODE_FLT
11821 && !HAVE_GNAT_AUX_INFO (type))
11822 INIT_GNAT_SPECIFIC (type);
11824 if (cu->type_hash == NULL)
11826 gdb_assert (cu->per_cu != NULL);
11827 cu->per_cu->type_hash
11828 = htab_create_alloc_ex (cu->header.length / 24,
11829 offset_and_type_hash,
11830 offset_and_type_eq,
11832 &cu->objfile->objfile_obstack,
11833 hashtab_obstack_allocate,
11834 dummy_obstack_deallocate);
11835 cu->type_hash = cu->per_cu->type_hash;
11838 ofs.offset = die->offset;
11840 slot = (struct dwarf2_offset_and_type **)
11841 htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
11842 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
11847 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11848 not have a saved type. */
11850 static struct type *
11851 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
11853 struct dwarf2_offset_and_type *slot, ofs;
11854 htab_t type_hash = cu->type_hash;
11856 if (type_hash == NULL)
11859 ofs.offset = die->offset;
11860 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
11867 /* Add a dependence relationship from CU to REF_PER_CU. */
11870 dwarf2_add_dependence (struct dwarf2_cu *cu,
11871 struct dwarf2_per_cu_data *ref_per_cu)
11875 if (cu->dependencies == NULL)
11877 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
11878 NULL, &cu->comp_unit_obstack,
11879 hashtab_obstack_allocate,
11880 dummy_obstack_deallocate);
11882 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
11884 *slot = ref_per_cu;
11887 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11888 Set the mark field in every compilation unit in the
11889 cache that we must keep because we are keeping CU. */
11892 dwarf2_mark_helper (void **slot, void *data)
11894 struct dwarf2_per_cu_data *per_cu;
11896 per_cu = (struct dwarf2_per_cu_data *) *slot;
11897 if (per_cu->cu->mark)
11899 per_cu->cu->mark = 1;
11901 if (per_cu->cu->dependencies != NULL)
11902 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
11907 /* Set the mark field in CU and in every other compilation unit in the
11908 cache that we must keep because we are keeping CU. */
11911 dwarf2_mark (struct dwarf2_cu *cu)
11916 if (cu->dependencies != NULL)
11917 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
11921 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
11925 per_cu->cu->mark = 0;
11926 per_cu = per_cu->cu->read_in_chain;
11930 /* Trivial hash function for partial_die_info: the hash value of a DIE
11931 is its offset in .debug_info for this objfile. */
11934 partial_die_hash (const void *item)
11936 const struct partial_die_info *part_die = item;
11937 return part_die->offset;
11940 /* Trivial comparison function for partial_die_info structures: two DIEs
11941 are equal if they have the same offset. */
11944 partial_die_eq (const void *item_lhs, const void *item_rhs)
11946 const struct partial_die_info *part_die_lhs = item_lhs;
11947 const struct partial_die_info *part_die_rhs = item_rhs;
11948 return part_die_lhs->offset == part_die_rhs->offset;
11951 static struct cmd_list_element *set_dwarf2_cmdlist;
11952 static struct cmd_list_element *show_dwarf2_cmdlist;
11955 set_dwarf2_cmd (char *args, int from_tty)
11957 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
11961 show_dwarf2_cmd (char *args, int from_tty)
11963 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
11966 /* If section described by INFO was mmapped, munmap it now. */
11969 munmap_section_buffer (struct dwarf2_section_info *info)
11971 if (info->was_mmapped)
11974 intptr_t begin = (intptr_t) info->buffer;
11975 intptr_t map_begin = begin & ~(pagesize - 1);
11976 size_t map_length = info->size + begin - map_begin;
11977 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
11979 /* Without HAVE_MMAP, we should never be here to begin with. */
11985 /* munmap debug sections for OBJFILE, if necessary. */
11988 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
11990 struct dwarf2_per_objfile *data = d;
11991 munmap_section_buffer (&data->info);
11992 munmap_section_buffer (&data->abbrev);
11993 munmap_section_buffer (&data->line);
11994 munmap_section_buffer (&data->str);
11995 munmap_section_buffer (&data->macinfo);
11996 munmap_section_buffer (&data->ranges);
11997 munmap_section_buffer (&data->loc);
11998 munmap_section_buffer (&data->frame);
11999 munmap_section_buffer (&data->eh_frame);
12002 void _initialize_dwarf2_read (void);
12005 _initialize_dwarf2_read (void)
12007 dwarf2_objfile_data_key
12008 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
12010 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
12011 Set DWARF 2 specific variables.\n\
12012 Configure DWARF 2 variables such as the cache size"),
12013 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
12014 0/*allow-unknown*/, &maintenance_set_cmdlist);
12016 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
12017 Show DWARF 2 specific variables\n\
12018 Show DWARF 2 variables such as the cache size"),
12019 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
12020 0/*allow-unknown*/, &maintenance_show_cmdlist);
12022 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
12023 &dwarf2_max_cache_age, _("\
12024 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12025 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12026 A higher limit means that cached compilation units will be stored\n\
12027 in memory longer, and more total memory will be used. Zero disables\n\
12028 caching, which can slow down startup."),
12030 show_dwarf2_max_cache_age,
12031 &set_dwarf2_cmdlist,
12032 &show_dwarf2_cmdlist);
12034 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
12035 Set debugging of the dwarf2 DIE reader."), _("\
12036 Show debugging of the dwarf2 DIE reader."), _("\
12037 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12038 The value is the maximum depth to print."),
12041 &setdebuglist, &showdebuglist);