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
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>
64 /* .debug_info header for a compilation unit
65 Because of alignment constraints, this structure has padding and cannot
66 be mapped directly onto the beginning of the .debug_info section. */
67 typedef struct comp_unit_header
69 unsigned int length; /* length of the .debug_info
71 unsigned short version; /* version number -- 2 for DWARF
73 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
74 unsigned char addr_size; /* byte size of an address -- 4 */
77 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
80 /* .debug_pubnames header
81 Because of alignment constraints, this structure has padding and cannot
82 be mapped directly onto the beginning of the .debug_info section. */
83 typedef struct pubnames_header
85 unsigned int length; /* length of the .debug_pubnames
87 unsigned char version; /* version number -- 2 for DWARF
89 unsigned int info_offset; /* offset into .debug_info section */
90 unsigned int info_size; /* byte size of .debug_info section
94 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
96 /* .debug_pubnames header
97 Because of alignment constraints, this structure has padding and cannot
98 be mapped directly onto the beginning of the .debug_info section. */
99 typedef struct aranges_header
101 unsigned int length; /* byte len of the .debug_aranges
103 unsigned short version; /* version number -- 2 for DWARF
105 unsigned int info_offset; /* offset into .debug_info section */
106 unsigned char addr_size; /* byte size of an address */
107 unsigned char seg_size; /* byte size of segment descriptor */
110 #define _ACTUAL_ARANGES_HEADER_SIZE 12
112 /* .debug_line statement program prologue
113 Because of alignment constraints, this structure has padding and cannot
114 be mapped directly onto the beginning of the .debug_info section. */
115 typedef struct statement_prologue
117 unsigned int total_length; /* byte length of the statement
119 unsigned short version; /* version number -- 2 for DWARF
121 unsigned int prologue_length; /* # bytes between prologue &
123 unsigned char minimum_instruction_length; /* byte size of
125 unsigned char default_is_stmt; /* initial value of is_stmt
128 unsigned char line_range;
129 unsigned char opcode_base; /* number assigned to first special
131 unsigned char *standard_opcode_lengths;
135 /* When non-zero, dump DIEs after they are read in. */
136 static int dwarf2_die_debug = 0;
140 /* When set, the file that we're processing is known to have debugging
141 info for C++ namespaces. GCC 3.3.x did not produce this information,
142 but later versions do. */
144 static int processing_has_namespace_info;
146 static const struct objfile_data *dwarf2_objfile_data_key;
148 struct dwarf2_section_info
156 struct dwarf2_per_objfile
158 struct dwarf2_section_info info;
159 struct dwarf2_section_info abbrev;
160 struct dwarf2_section_info line;
161 struct dwarf2_section_info pubnames;
162 struct dwarf2_section_info aranges;
163 struct dwarf2_section_info loc;
164 struct dwarf2_section_info macinfo;
165 struct dwarf2_section_info str;
166 struct dwarf2_section_info ranges;
167 struct dwarf2_section_info types;
168 struct dwarf2_section_info frame;
169 struct dwarf2_section_info eh_frame;
171 /* A list of all the compilation units. This is used to locate
172 the target compilation unit of a particular reference. */
173 struct dwarf2_per_cu_data **all_comp_units;
175 /* The number of compilation units in ALL_COMP_UNITS. */
178 /* A chain of compilation units that are currently read in, so that
179 they can be freed later. */
180 struct dwarf2_per_cu_data *read_in_chain;
182 /* A table mapping .debug_types signatures to its signatured_type entry.
183 This is NULL if the .debug_types section hasn't been read in yet. */
184 htab_t signatured_types;
186 /* A flag indicating wether this objfile has a section loaded at a
188 int has_section_at_zero;
191 static struct dwarf2_per_objfile *dwarf2_per_objfile;
193 /* names of the debugging sections */
195 /* Note that if the debugging section has been compressed, it might
196 have a name like .zdebug_info. */
198 #define INFO_SECTION "debug_info"
199 #define ABBREV_SECTION "debug_abbrev"
200 #define LINE_SECTION "debug_line"
201 #define PUBNAMES_SECTION "debug_pubnames"
202 #define ARANGES_SECTION "debug_aranges"
203 #define LOC_SECTION "debug_loc"
204 #define MACINFO_SECTION "debug_macinfo"
205 #define STR_SECTION "debug_str"
206 #define RANGES_SECTION "debug_ranges"
207 #define TYPES_SECTION "debug_types"
208 #define FRAME_SECTION "debug_frame"
209 #define EH_FRAME_SECTION "eh_frame"
211 /* local data types */
213 /* We hold several abbreviation tables in memory at the same time. */
214 #ifndef ABBREV_HASH_SIZE
215 #define ABBREV_HASH_SIZE 121
218 /* The data in a compilation unit header, after target2host
219 translation, looks like this. */
220 struct comp_unit_head
224 unsigned char addr_size;
225 unsigned char signed_addr_p;
226 unsigned int abbrev_offset;
228 /* Size of file offsets; either 4 or 8. */
229 unsigned int offset_size;
231 /* Size of the length field; either 4 or 12. */
232 unsigned int initial_length_size;
234 /* Offset to the first byte of this compilation unit header in the
235 .debug_info section, for resolving relative reference dies. */
238 /* Offset to first die in this cu from the start of the cu.
239 This will be the first byte following the compilation unit header. */
240 unsigned int first_die_offset;
243 /* Internal state when decoding a particular compilation unit. */
246 /* The objfile containing this compilation unit. */
247 struct objfile *objfile;
249 /* The header of the compilation unit. */
250 struct comp_unit_head header;
252 /* Base address of this compilation unit. */
253 CORE_ADDR base_address;
255 /* Non-zero if base_address has been set. */
258 struct function_range *first_fn, *last_fn, *cached_fn;
260 /* The language we are debugging. */
261 enum language language;
262 const struct language_defn *language_defn;
264 const char *producer;
266 /* The generic symbol table building routines have separate lists for
267 file scope symbols and all all other scopes (local scopes). So
268 we need to select the right one to pass to add_symbol_to_list().
269 We do it by keeping a pointer to the correct list in list_in_scope.
271 FIXME: The original dwarf code just treated the file scope as the
272 first local scope, and all other local scopes as nested local
273 scopes, and worked fine. Check to see if we really need to
274 distinguish these in buildsym.c. */
275 struct pending **list_in_scope;
277 /* DWARF abbreviation table associated with this compilation unit. */
278 struct abbrev_info **dwarf2_abbrevs;
280 /* Storage for the abbrev table. */
281 struct obstack abbrev_obstack;
283 /* Hash table holding all the loaded partial DIEs. */
286 /* `.debug_ranges' offset for this `DW_TAG_compile_unit' DIE. */
287 unsigned int ranges_offset;
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;
337 /* Field `ranges_offset' is filled in; flag as the value may be zero. */
338 unsigned int has_ranges_offset : 1;
341 /* Persistent data held for a compilation unit, even when not
342 processing it. We put a pointer to this structure in the
343 read_symtab_private field of the psymtab. If we encounter
344 inter-compilation-unit references, we also maintain a sorted
345 list of all compilation units. */
347 struct dwarf2_per_cu_data
349 /* The start offset and length of this compilation unit. 2**29-1
350 bytes should suffice to store the length of any compilation unit
351 - if it doesn't, GDB will fall over anyway.
352 NOTE: Unlike comp_unit_head.length, this length includes
353 initial_length_size. */
355 unsigned int length : 29;
357 /* Flag indicating this compilation unit will be read in before
358 any of the current compilation units are processed. */
359 unsigned int queued : 1;
361 /* This flag will be set if we need to load absolutely all DIEs
362 for this compilation unit, instead of just the ones we think
363 are interesting. It gets set if we look for a DIE in the
364 hash table and don't find it. */
365 unsigned int load_all_dies : 1;
367 /* Non-zero if this CU is from .debug_types.
368 Otherwise it's from .debug_info. */
369 unsigned int from_debug_types : 1;
371 /* Set iff currently read in. */
372 struct dwarf2_cu *cu;
374 /* If full symbols for this CU have been read in, then this field
375 holds a map of DIE offsets to types. It isn't always possible
376 to reconstruct this information later, so we have to preserve
380 /* The partial symbol table associated with this compilation unit,
381 or NULL for partial units (which do not have an associated
383 struct partial_symtab *psymtab;
386 /* Entry in the signatured_types hash table. */
388 struct signatured_type
392 /* Offset in .debug_types of the TU (type_unit) for this type. */
395 /* Offset in .debug_types of the type defined by this TU. */
396 unsigned int type_offset;
398 /* The CU(/TU) of this type. */
399 struct dwarf2_per_cu_data per_cu;
402 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
403 which are used for both .debug_info and .debug_types dies.
404 All parameters here are unchanging for the life of the call.
405 This struct exists to abstract away the constant parameters of
408 struct die_reader_specs
410 /* The bfd of this objfile. */
413 /* The CU of the DIE we are parsing. */
414 struct dwarf2_cu *cu;
416 /* Pointer to start of section buffer.
417 This is either the start of .debug_info or .debug_types. */
418 const gdb_byte *buffer;
421 /* The line number information for a compilation unit (found in the
422 .debug_line section) begins with a "statement program header",
423 which contains the following information. */
426 unsigned int total_length;
427 unsigned short version;
428 unsigned int header_length;
429 unsigned char minimum_instruction_length;
430 unsigned char default_is_stmt;
432 unsigned char line_range;
433 unsigned char opcode_base;
435 /* standard_opcode_lengths[i] is the number of operands for the
436 standard opcode whose value is i. This means that
437 standard_opcode_lengths[0] is unused, and the last meaningful
438 element is standard_opcode_lengths[opcode_base - 1]. */
439 unsigned char *standard_opcode_lengths;
441 /* The include_directories table. NOTE! These strings are not
442 allocated with xmalloc; instead, they are pointers into
443 debug_line_buffer. If you try to free them, `free' will get
445 unsigned int num_include_dirs, include_dirs_size;
448 /* The file_names table. NOTE! These strings are not allocated
449 with xmalloc; instead, they are pointers into debug_line_buffer.
450 Don't try to free them directly. */
451 unsigned int num_file_names, file_names_size;
455 unsigned int dir_index;
456 unsigned int mod_time;
458 int included_p; /* Non-zero if referenced by the Line Number Program. */
459 struct symtab *symtab; /* The associated symbol table, if any. */
462 /* The start and end of the statement program following this
463 header. These point into dwarf2_per_objfile->line_buffer. */
464 gdb_byte *statement_program_start, *statement_program_end;
467 /* When we construct a partial symbol table entry we only
468 need this much information. */
469 struct partial_die_info
471 /* Offset of this DIE. */
474 /* DWARF-2 tag for this DIE. */
475 ENUM_BITFIELD(dwarf_tag) tag : 16;
477 /* Language code associated with this DIE. This is only used
478 for the compilation unit DIE. */
479 unsigned int language : 8;
481 /* Assorted flags describing the data found in this DIE. */
482 unsigned int has_children : 1;
483 unsigned int is_external : 1;
484 unsigned int is_declaration : 1;
485 unsigned int has_type : 1;
486 unsigned int has_specification : 1;
487 unsigned int has_stmt_list : 1;
488 unsigned int has_pc_info : 1;
490 /* Flag set if the SCOPE field of this structure has been
492 unsigned int scope_set : 1;
494 /* Flag set if the DIE has a byte_size attribute. */
495 unsigned int has_byte_size : 1;
497 /* The name of this DIE. Normally the value of DW_AT_name, but
498 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
503 /* The scope to prepend to our children. This is generally
504 allocated on the comp_unit_obstack, so will disappear
505 when this compilation unit leaves the cache. */
508 /* The location description associated with this DIE, if any. */
509 struct dwarf_block *locdesc;
511 /* If HAS_PC_INFO, the PC range associated with this DIE. */
515 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
516 DW_AT_sibling, if any. */
519 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
520 DW_AT_specification (or DW_AT_abstract_origin or
522 unsigned int spec_offset;
524 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
525 unsigned int line_offset;
527 /* Pointers to this DIE's parent, first child, and next sibling,
529 struct partial_die_info *die_parent, *die_child, *die_sibling;
532 /* This data structure holds the information of an abbrev. */
535 unsigned int number; /* number identifying abbrev */
536 enum dwarf_tag tag; /* dwarf tag */
537 unsigned short has_children; /* boolean */
538 unsigned short num_attrs; /* number of attributes */
539 struct attr_abbrev *attrs; /* an array of attribute descriptions */
540 struct abbrev_info *next; /* next in chain */
545 ENUM_BITFIELD(dwarf_attribute) name : 16;
546 ENUM_BITFIELD(dwarf_form) form : 16;
549 /* Additional GDB-specific attribute forms. */
552 /* A string which has been updated to GDB's internal
553 representation (e.g. converted to canonical form) and does not
554 need to be updated again. */
555 GDB_FORM_cached_string = 0xff
558 /* Attributes have a name and a value */
561 ENUM_BITFIELD(dwarf_attribute) name : 16;
562 ENUM_BITFIELD(dwarf_form) form : 16;
566 struct dwarf_block *blk;
570 struct signatured_type *signatured_type;
575 /* This data structure holds a complete die structure. */
578 /* DWARF-2 tag for this DIE. */
579 ENUM_BITFIELD(dwarf_tag) tag : 16;
581 /* Number of attributes */
582 unsigned short num_attrs;
587 /* Offset in .debug_info or .debug_types section. */
590 /* The dies in a compilation unit form an n-ary tree. PARENT
591 points to this die's parent; CHILD points to the first child of
592 this node; and all the children of a given node are chained
593 together via their SIBLING fields, terminated by a die whose
595 struct die_info *child; /* Its first child, if any. */
596 struct die_info *sibling; /* Its next sibling, if any. */
597 struct die_info *parent; /* Its parent, if any. */
599 /* An array of attributes, with NUM_ATTRS elements. There may be
600 zero, but it's not common and zero-sized arrays are not
601 sufficiently portable C. */
602 struct attribute attrs[1];
605 struct function_range
608 CORE_ADDR lowpc, highpc;
610 struct function_range *next;
613 /* Get at parts of an attribute structure */
615 #define DW_STRING(attr) ((attr)->u.str)
616 #define DW_UNSND(attr) ((attr)->u.unsnd)
617 #define DW_BLOCK(attr) ((attr)->u.blk)
618 #define DW_SND(attr) ((attr)->u.snd)
619 #define DW_ADDR(attr) ((attr)->u.addr)
620 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
622 /* Blocks are a bunch of untyped bytes. */
629 #ifndef ATTR_ALLOC_CHUNK
630 #define ATTR_ALLOC_CHUNK 4
633 /* Allocate fields for structs, unions and enums in this size. */
634 #ifndef DW_FIELD_ALLOC_CHUNK
635 #define DW_FIELD_ALLOC_CHUNK 4
638 /* A zeroed version of a partial die for initialization purposes. */
639 static struct partial_die_info zeroed_partial_die;
641 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
642 but this would require a corresponding change in unpack_field_as_long
644 static int bits_per_byte = 8;
646 /* The routines that read and process dies for a C struct or C++ class
647 pass lists of data member fields and lists of member function fields
648 in an instance of a field_info structure, as defined below. */
651 /* List of data member and baseclasses fields. */
654 struct nextfield *next;
661 /* Number of fields. */
664 /* Number of baseclasses. */
667 /* Set if the accesibility of one of the fields is not public. */
668 int non_public_fields;
670 /* Member function fields array, entries are allocated in the order they
671 are encountered in the object file. */
674 struct nextfnfield *next;
675 struct fn_field fnfield;
679 /* Member function fieldlist array, contains name of possibly overloaded
680 member function, number of overloaded member functions and a pointer
681 to the head of the member function field chain. */
686 struct nextfnfield *head;
690 /* Number of entries in the fnfieldlists array. */
694 /* One item on the queue of compilation units to read in full symbols
696 struct dwarf2_queue_item
698 struct dwarf2_per_cu_data *per_cu;
699 struct dwarf2_queue_item *next;
702 /* The current queue. */
703 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
705 /* Loaded secondary compilation units are kept in memory until they
706 have not been referenced for the processing of this many
707 compilation units. Set this to zero to disable caching. Cache
708 sizes of up to at least twenty will improve startup time for
709 typical inter-CU-reference binaries, at an obvious memory cost. */
710 static int dwarf2_max_cache_age = 5;
712 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
713 struct cmd_list_element *c, const char *value)
715 fprintf_filtered (file, _("\
716 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
721 /* Various complaints about symbol reading that don't abort the process */
724 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
726 complaint (&symfile_complaints,
727 _("statement list doesn't fit in .debug_line section"));
731 dwarf2_debug_line_missing_file_complaint (void)
733 complaint (&symfile_complaints,
734 _(".debug_line section has line data without a file"));
738 dwarf2_debug_line_missing_end_sequence_complaint (void)
740 complaint (&symfile_complaints,
741 _(".debug_line section has line program sequence without an end"));
745 dwarf2_complex_location_expr_complaint (void)
747 complaint (&symfile_complaints, _("location expression too complex"));
751 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
754 complaint (&symfile_complaints,
755 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
760 dwarf2_macros_too_long_complaint (void)
762 complaint (&symfile_complaints,
763 _("macro info runs off end of `.debug_macinfo' section"));
767 dwarf2_macro_malformed_definition_complaint (const char *arg1)
769 complaint (&symfile_complaints,
770 _("macro debug info contains a malformed macro definition:\n`%s'"),
775 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
777 complaint (&symfile_complaints,
778 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
781 /* local function prototypes */
783 static void dwarf2_locate_sections (bfd *, asection *, void *);
786 static void dwarf2_build_psymtabs_easy (struct objfile *, int);
789 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
792 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
793 struct partial_die_info *,
794 struct partial_symtab *);
796 static void dwarf2_build_psymtabs_hard (struct objfile *, int);
798 static void scan_partial_symbols (struct partial_die_info *,
799 CORE_ADDR *, CORE_ADDR *,
800 int, struct dwarf2_cu *);
802 static void add_partial_symbol (struct partial_die_info *,
805 static int pdi_needs_namespace (enum dwarf_tag tag);
807 static void add_partial_namespace (struct partial_die_info *pdi,
808 CORE_ADDR *lowpc, CORE_ADDR *highpc,
809 int need_pc, struct dwarf2_cu *cu);
811 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
812 CORE_ADDR *highpc, int need_pc,
813 struct dwarf2_cu *cu);
815 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
816 struct dwarf2_cu *cu);
818 static void add_partial_subprogram (struct partial_die_info *pdi,
819 CORE_ADDR *lowpc, CORE_ADDR *highpc,
820 int need_pc, struct dwarf2_cu *cu);
822 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
823 gdb_byte *buffer, gdb_byte *info_ptr,
824 bfd *abfd, struct dwarf2_cu *cu);
826 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
828 static void psymtab_to_symtab_1 (struct partial_symtab *);
830 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
832 static void dwarf2_free_abbrev_table (void *);
834 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
837 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
840 static struct partial_die_info *load_partial_dies (bfd *,
841 gdb_byte *, gdb_byte *,
842 int, struct dwarf2_cu *);
844 static gdb_byte *read_partial_die (struct partial_die_info *,
845 struct abbrev_info *abbrev,
847 gdb_byte *, gdb_byte *,
850 static struct partial_die_info *find_partial_die (unsigned int,
853 static void fixup_partial_die (struct partial_die_info *,
856 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
857 bfd *, gdb_byte *, struct dwarf2_cu *);
859 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
860 bfd *, gdb_byte *, struct dwarf2_cu *);
862 static unsigned int read_1_byte (bfd *, gdb_byte *);
864 static int read_1_signed_byte (bfd *, gdb_byte *);
866 static unsigned int read_2_bytes (bfd *, gdb_byte *);
868 static unsigned int read_4_bytes (bfd *, gdb_byte *);
870 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
872 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
875 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
877 static LONGEST read_checked_initial_length_and_offset
878 (bfd *, gdb_byte *, const struct comp_unit_head *,
879 unsigned int *, unsigned int *);
881 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
884 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
886 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
888 static char *read_string (bfd *, gdb_byte *, unsigned int *);
890 static char *read_indirect_string (bfd *, gdb_byte *,
891 const struct comp_unit_head *,
894 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
896 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
898 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
900 static void set_cu_language (unsigned int, struct dwarf2_cu *);
902 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
905 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
909 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
910 struct dwarf2_cu *cu);
912 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
914 static struct die_info *die_specification (struct die_info *die,
915 struct dwarf2_cu **);
917 static void free_line_header (struct line_header *lh);
919 static void add_file_name (struct line_header *, char *, unsigned int,
920 unsigned int, unsigned int);
922 static struct line_header *(dwarf_decode_line_header
923 (unsigned int offset,
924 bfd *abfd, struct dwarf2_cu *cu));
926 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
927 struct dwarf2_cu *, struct partial_symtab *);
929 static void dwarf2_start_subfile (char *, char *, char *);
931 static struct symbol *new_symbol (struct die_info *, struct type *,
934 static void dwarf2_const_value (struct attribute *, struct symbol *,
937 static void dwarf2_const_value_data (struct attribute *attr,
941 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
943 static struct type *die_containing_type (struct die_info *,
946 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
948 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
950 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
952 static char *typename_concat (struct obstack *,
957 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
959 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
961 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
963 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
965 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
966 struct dwarf2_cu *, struct partial_symtab *);
968 static int dwarf2_get_pc_bounds (struct die_info *,
969 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *);
971 static void get_scope_pc_bounds (struct die_info *,
972 CORE_ADDR *, CORE_ADDR *,
975 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
976 CORE_ADDR, struct dwarf2_cu *);
978 static void dwarf2_add_field (struct field_info *, struct die_info *,
981 static void dwarf2_attach_fields_to_type (struct field_info *,
982 struct type *, struct dwarf2_cu *);
984 static void dwarf2_add_member_fn (struct field_info *,
985 struct die_info *, struct type *,
988 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
989 struct type *, struct dwarf2_cu *);
991 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
993 static const char *determine_class_name (struct die_info *die,
994 struct dwarf2_cu *cu);
996 static void read_common_block (struct die_info *, struct dwarf2_cu *);
998 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
1000 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
1002 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
1004 static const char *namespace_name (struct die_info *die,
1005 int *is_anonymous, struct dwarf2_cu *);
1007 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
1009 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
1011 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1012 struct dwarf2_cu *);
1014 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1016 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1018 gdb_byte **new_info_ptr,
1019 struct die_info *parent);
1021 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1023 gdb_byte **new_info_ptr,
1024 struct die_info *parent);
1026 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1028 gdb_byte **new_info_ptr,
1029 struct die_info *parent);
1031 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1032 struct die_info **, gdb_byte *,
1035 static void process_die (struct die_info *, struct dwarf2_cu *);
1037 static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
1039 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1042 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1044 static struct die_info *dwarf2_extension (struct die_info *die,
1045 struct dwarf2_cu **);
1047 static char *dwarf_tag_name (unsigned int);
1049 static char *dwarf_attr_name (unsigned int);
1051 static char *dwarf_form_name (unsigned int);
1053 static char *dwarf_stack_op_name (unsigned int);
1055 static char *dwarf_bool_name (unsigned int);
1057 static char *dwarf_type_encoding_name (unsigned int);
1060 static char *dwarf_cfi_name (unsigned int);
1063 static struct die_info *sibling_die (struct die_info *);
1065 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1067 static void dump_die_for_error (struct die_info *);
1069 static void dump_die_1 (struct ui_file *, int level, int max_level,
1072 /*static*/ void dump_die (struct die_info *, int max_level);
1074 static void store_in_ref_table (struct die_info *,
1075 struct dwarf2_cu *);
1077 static int is_ref_attr (struct attribute *);
1079 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1081 static int dwarf2_get_attr_constant_value (struct attribute *, int);
1083 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1085 struct dwarf2_cu **);
1087 static struct die_info *follow_die_ref (struct die_info *,
1089 struct dwarf2_cu **);
1091 static struct die_info *follow_die_sig (struct die_info *,
1093 struct dwarf2_cu **);
1095 static void read_signatured_type_at_offset (struct objfile *objfile,
1096 unsigned int offset);
1098 static void read_signatured_type (struct objfile *,
1099 struct signatured_type *type_sig);
1101 /* memory allocation interface */
1103 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1105 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1107 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1109 static void initialize_cu_func_list (struct dwarf2_cu *);
1111 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1112 struct dwarf2_cu *);
1114 static void dwarf_decode_macros (struct line_header *, unsigned int,
1115 char *, bfd *, struct dwarf2_cu *);
1117 static int attr_form_is_block (struct attribute *);
1119 static int attr_form_is_section_offset (struct attribute *);
1121 static int attr_form_is_constant (struct attribute *);
1123 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1125 struct dwarf2_cu *cu);
1127 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1128 struct abbrev_info *abbrev,
1129 struct dwarf2_cu *cu);
1131 static void free_stack_comp_unit (void *);
1133 static hashval_t partial_die_hash (const void *item);
1135 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1137 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1138 (unsigned int offset, struct objfile *objfile);
1140 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1141 (unsigned int offset, struct objfile *objfile);
1143 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1145 static void free_one_comp_unit (void *);
1147 static void free_cached_comp_units (void *);
1149 static void age_cached_comp_units (void);
1151 static void free_one_cached_comp_unit (void *);
1153 static struct type *set_die_type (struct die_info *, struct type *,
1154 struct dwarf2_cu *);
1156 static void create_all_comp_units (struct objfile *);
1158 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1161 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1163 static void dwarf2_add_dependence (struct dwarf2_cu *,
1164 struct dwarf2_per_cu_data *);
1166 static void dwarf2_mark (struct dwarf2_cu *);
1168 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1170 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1172 /* Try to locate the sections we need for DWARF 2 debugging
1173 information and return true if we have enough to do something. */
1176 dwarf2_has_info (struct objfile *objfile)
1178 struct dwarf2_per_objfile *data;
1180 /* Initialize per-objfile state. */
1181 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1182 memset (data, 0, sizeof (*data));
1183 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1184 dwarf2_per_objfile = data;
1186 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1187 return (data->info.asection != NULL && data->abbrev.asection != NULL);
1190 /* When loading sections, we can either look for ".<name>", or for
1191 * ".z<name>", which indicates a compressed section. */
1194 section_is_p (const char *section_name, const char *name)
1196 return (section_name[0] == '.'
1197 && (strcmp (section_name + 1, name) == 0
1198 || (section_name[1] == 'z'
1199 && strcmp (section_name + 2, name) == 0)));
1202 /* This function is mapped across the sections and remembers the
1203 offset and size of each of the debugging sections we are interested
1207 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1209 if (section_is_p (sectp->name, INFO_SECTION))
1211 dwarf2_per_objfile->info.asection = sectp;
1212 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1214 else if (section_is_p (sectp->name, ABBREV_SECTION))
1216 dwarf2_per_objfile->abbrev.asection = sectp;
1217 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1219 else if (section_is_p (sectp->name, LINE_SECTION))
1221 dwarf2_per_objfile->line.asection = sectp;
1222 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1224 else if (section_is_p (sectp->name, PUBNAMES_SECTION))
1226 dwarf2_per_objfile->pubnames.asection = sectp;
1227 dwarf2_per_objfile->pubnames.size = bfd_get_section_size (sectp);
1229 else if (section_is_p (sectp->name, ARANGES_SECTION))
1231 dwarf2_per_objfile->aranges.asection = sectp;
1232 dwarf2_per_objfile->aranges.size = bfd_get_section_size (sectp);
1234 else if (section_is_p (sectp->name, LOC_SECTION))
1236 dwarf2_per_objfile->loc.asection = sectp;
1237 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1239 else if (section_is_p (sectp->name, MACINFO_SECTION))
1241 dwarf2_per_objfile->macinfo.asection = sectp;
1242 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1244 else if (section_is_p (sectp->name, STR_SECTION))
1246 dwarf2_per_objfile->str.asection = sectp;
1247 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1249 else if (section_is_p (sectp->name, FRAME_SECTION))
1251 dwarf2_per_objfile->frame.asection = sectp;
1252 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1254 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1256 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1257 if (aflag & SEC_HAS_CONTENTS)
1259 dwarf2_per_objfile->eh_frame.asection = sectp;
1260 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1263 else if (section_is_p (sectp->name, RANGES_SECTION))
1265 dwarf2_per_objfile->ranges.asection = sectp;
1266 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1268 else if (section_is_p (sectp->name, TYPES_SECTION))
1270 dwarf2_per_objfile->types.asection = sectp;
1271 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1274 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1275 && bfd_section_vma (abfd, sectp) == 0)
1276 dwarf2_per_objfile->has_section_at_zero = 1;
1279 /* Decompress a section that was compressed using zlib. Store the
1280 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1283 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1284 gdb_byte **outbuf, bfd_size_type *outsize)
1286 bfd *abfd = objfile->obfd;
1288 error (_("Support for zlib-compressed DWARF data (from '%s') "
1289 "is disabled in this copy of GDB"),
1290 bfd_get_filename (abfd));
1292 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1293 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1294 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1295 bfd_size_type uncompressed_size;
1296 gdb_byte *uncompressed_buffer;
1299 int header_size = 12;
1301 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1302 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1303 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1304 bfd_get_filename (abfd));
1306 /* Read the zlib header. In this case, it should be "ZLIB" followed
1307 by the uncompressed section size, 8 bytes in big-endian order. */
1308 if (compressed_size < header_size
1309 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1310 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1311 bfd_get_filename (abfd));
1312 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1313 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1314 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1315 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1316 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1317 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1318 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1319 uncompressed_size += compressed_buffer[11];
1321 /* It is possible the section consists of several compressed
1322 buffers concatenated together, so we uncompress in a loop. */
1326 strm.avail_in = compressed_size - header_size;
1327 strm.next_in = (Bytef*) compressed_buffer + header_size;
1328 strm.avail_out = uncompressed_size;
1329 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1331 rc = inflateInit (&strm);
1332 while (strm.avail_in > 0)
1335 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1336 bfd_get_filename (abfd), rc);
1337 strm.next_out = ((Bytef*) uncompressed_buffer
1338 + (uncompressed_size - strm.avail_out));
1339 rc = inflate (&strm, Z_FINISH);
1340 if (rc != Z_STREAM_END)
1341 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1342 bfd_get_filename (abfd), rc);
1343 rc = inflateReset (&strm);
1345 rc = inflateEnd (&strm);
1347 || strm.avail_out != 0)
1348 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1349 bfd_get_filename (abfd), rc);
1351 do_cleanups (cleanup);
1352 *outbuf = uncompressed_buffer;
1353 *outsize = uncompressed_size;
1357 /* Read the contents of the section SECTP from object file specified by
1358 OBJFILE, store info about the section into INFO.
1359 If the section is compressed, uncompress it before returning. */
1362 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1364 bfd *abfd = objfile->obfd;
1365 asection *sectp = info->asection;
1366 gdb_byte *buf, *retbuf;
1367 unsigned char header[4];
1369 info->buffer = NULL;
1370 info->was_mmapped = 0;
1372 if (info->asection == NULL || info->size == 0)
1375 /* Check if the file has a 4-byte header indicating compression. */
1376 if (info->size > sizeof (header)
1377 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1378 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1380 /* Upon decompression, update the buffer and its size. */
1381 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1383 zlib_decompress_section (objfile, sectp, &info->buffer,
1391 pagesize = getpagesize ();
1393 /* Only try to mmap sections which are large enough: we don't want to
1394 waste space due to fragmentation. Also, only try mmap for sections
1395 without relocations. */
1397 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1399 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1400 size_t map_length = info->size + sectp->filepos - pg_offset;
1401 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1402 MAP_PRIVATE, pg_offset);
1404 if (retbuf != MAP_FAILED)
1406 info->was_mmapped = 1;
1407 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1413 /* If we get here, we are a normal, not-compressed section. */
1415 = obstack_alloc (&objfile->objfile_obstack, info->size);
1417 /* When debugging .o files, we may need to apply relocations; see
1418 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1419 We never compress sections in .o files, so we only need to
1420 try this when the section is not compressed. */
1421 retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
1424 info->buffer = retbuf;
1428 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1429 || bfd_bread (buf, info->size, abfd) != info->size)
1430 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1431 bfd_get_filename (abfd));
1434 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1438 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1439 asection **sectp, gdb_byte **bufp,
1440 bfd_size_type *sizep)
1442 struct dwarf2_per_objfile *data
1443 = objfile_data (objfile, dwarf2_objfile_data_key);
1444 struct dwarf2_section_info *info;
1445 if (section_is_p (section_name, EH_FRAME_SECTION))
1446 info = &data->eh_frame;
1447 else if (section_is_p (section_name, FRAME_SECTION))
1448 info = &data->frame;
1452 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1453 /* We haven't read this section in yet. Do it now. */
1454 dwarf2_read_section (objfile, info);
1456 *sectp = info->asection;
1457 *bufp = info->buffer;
1458 *sizep = info->size;
1461 /* Build a partial symbol table. */
1464 dwarf2_build_psymtabs (struct objfile *objfile, int mainline)
1466 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
1467 dwarf2_read_section (objfile, &dwarf2_per_objfile->abbrev);
1468 dwarf2_read_section (objfile, &dwarf2_per_objfile->line);
1469 dwarf2_read_section (objfile, &dwarf2_per_objfile->str);
1470 dwarf2_read_section (objfile, &dwarf2_per_objfile->macinfo);
1471 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
1472 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
1473 dwarf2_read_section (objfile, &dwarf2_per_objfile->loc);
1474 dwarf2_read_section (objfile, &dwarf2_per_objfile->eh_frame);
1475 dwarf2_read_section (objfile, &dwarf2_per_objfile->frame);
1478 || (objfile->global_psymbols.size == 0
1479 && objfile->static_psymbols.size == 0))
1481 init_psymbol_list (objfile, 1024);
1485 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1487 /* Things are significantly easier if we have .debug_aranges and
1488 .debug_pubnames sections */
1490 dwarf2_build_psymtabs_easy (objfile, mainline);
1494 /* only test this case for now */
1496 /* In this case we have to work a bit harder */
1497 dwarf2_build_psymtabs_hard (objfile, mainline);
1502 /* Build the partial symbol table from the information in the
1503 .debug_pubnames and .debug_aranges sections. */
1506 dwarf2_build_psymtabs_easy (struct objfile *objfile, int mainline)
1508 bfd *abfd = objfile->obfd;
1509 char *aranges_buffer, *pubnames_buffer;
1510 char *aranges_ptr, *pubnames_ptr;
1511 unsigned int entry_length, version, info_offset, info_size;
1513 pubnames_buffer = dwarf2_read_section (objfile,
1514 dwarf_pubnames_section);
1515 pubnames_ptr = pubnames_buffer;
1516 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames.size)
1518 unsigned int bytes_read;
1520 entry_length = read_initial_length (abfd, pubnames_ptr, &bytes_read);
1521 pubnames_ptr += bytes_read;
1522 version = read_1_byte (abfd, pubnames_ptr);
1524 info_offset = read_4_bytes (abfd, pubnames_ptr);
1526 info_size = read_4_bytes (abfd, pubnames_ptr);
1530 aranges_buffer = dwarf2_read_section (objfile,
1531 dwarf_aranges_section);
1536 /* Return TRUE if OFFSET is within CU_HEADER. */
1539 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
1541 unsigned int bottom = cu_header->offset;
1542 unsigned int top = (cu_header->offset
1544 + cu_header->initial_length_size);
1545 return (offset >= bottom && offset < top);
1548 /* Read in the comp unit header information from the debug_info at info_ptr.
1549 NOTE: This leaves members offset, first_die_offset to be filled in
1553 read_comp_unit_head (struct comp_unit_head *cu_header,
1554 gdb_byte *info_ptr, bfd *abfd)
1557 unsigned int bytes_read;
1559 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
1560 cu_header->initial_length_size = bytes_read;
1561 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
1562 info_ptr += bytes_read;
1563 cu_header->version = read_2_bytes (abfd, info_ptr);
1565 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1567 info_ptr += bytes_read;
1568 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1570 signed_addr = bfd_get_sign_extend_vma (abfd);
1571 if (signed_addr < 0)
1572 internal_error (__FILE__, __LINE__,
1573 _("read_comp_unit_head: dwarf from non elf file"));
1574 cu_header->signed_addr_p = signed_addr;
1580 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1581 gdb_byte *buffer, unsigned int buffer_size,
1584 gdb_byte *beg_of_comp_unit = info_ptr;
1586 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1588 if (header->version != 2 && header->version != 3)
1589 error (_("Dwarf Error: wrong version in compilation unit header "
1590 "(is %d, should be %d) [in module %s]"), header->version,
1591 2, bfd_get_filename (abfd));
1593 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
1594 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1595 "(offset 0x%lx + 6) [in module %s]"),
1596 (long) header->abbrev_offset,
1597 (long) (beg_of_comp_unit - buffer),
1598 bfd_get_filename (abfd));
1600 if (beg_of_comp_unit + header->length + header->initial_length_size
1601 > buffer + buffer_size)
1602 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1603 "(offset 0x%lx + 0) [in module %s]"),
1604 (long) header->length,
1605 (long) (beg_of_comp_unit - buffer),
1606 bfd_get_filename (abfd));
1611 /* Read in the types comp unit header information from .debug_types entry at
1612 types_ptr. The result is a pointer to one past the end of the header. */
1615 read_type_comp_unit_head (struct comp_unit_head *cu_header,
1616 ULONGEST *signature,
1617 gdb_byte *types_ptr, bfd *abfd)
1619 unsigned int bytes_read;
1620 gdb_byte *initial_types_ptr = types_ptr;
1622 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
1624 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
1626 *signature = read_8_bytes (abfd, types_ptr);
1628 types_ptr += cu_header->offset_size;
1629 cu_header->first_die_offset = types_ptr - initial_types_ptr;
1634 /* Allocate a new partial symtab for file named NAME and mark this new
1635 partial symtab as being an include of PST. */
1638 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1639 struct objfile *objfile)
1641 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1643 subpst->section_offsets = pst->section_offsets;
1644 subpst->textlow = 0;
1645 subpst->texthigh = 0;
1647 subpst->dependencies = (struct partial_symtab **)
1648 obstack_alloc (&objfile->objfile_obstack,
1649 sizeof (struct partial_symtab *));
1650 subpst->dependencies[0] = pst;
1651 subpst->number_of_dependencies = 1;
1653 subpst->globals_offset = 0;
1654 subpst->n_global_syms = 0;
1655 subpst->statics_offset = 0;
1656 subpst->n_static_syms = 0;
1657 subpst->symtab = NULL;
1658 subpst->read_symtab = pst->read_symtab;
1661 /* No private part is necessary for include psymtabs. This property
1662 can be used to differentiate between such include psymtabs and
1663 the regular ones. */
1664 subpst->read_symtab_private = NULL;
1667 /* Read the Line Number Program data and extract the list of files
1668 included by the source file represented by PST. Build an include
1669 partial symtab for each of these included files.
1671 This procedure assumes that there *is* a Line Number Program in
1672 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1673 before calling this procedure. */
1676 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1677 struct partial_die_info *pdi,
1678 struct partial_symtab *pst)
1680 struct objfile *objfile = cu->objfile;
1681 bfd *abfd = objfile->obfd;
1682 struct line_header *lh;
1684 lh = dwarf_decode_line_header (pdi->line_offset, abfd, cu);
1686 return; /* No linetable, so no includes. */
1688 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1690 free_line_header (lh);
1694 hash_type_signature (const void *item)
1696 const struct signatured_type *type_sig = item;
1697 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1698 return type_sig->signature;
1702 eq_type_signature (const void *item_lhs, const void *item_rhs)
1704 const struct signatured_type *lhs = item_lhs;
1705 const struct signatured_type *rhs = item_rhs;
1706 return lhs->signature == rhs->signature;
1709 /* Create the hash table of all entries in the .debug_types section.
1710 The result is zero if there is an error (e.g. missing .debug_types section),
1711 otherwise non-zero. */
1714 create_debug_types_hash_table (struct objfile *objfile)
1716 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer;
1719 if (info_ptr == NULL)
1721 dwarf2_per_objfile->signatured_types = NULL;
1725 types_htab = htab_create_alloc_ex (41,
1726 hash_type_signature,
1729 &objfile->objfile_obstack,
1730 hashtab_obstack_allocate,
1731 dummy_obstack_deallocate);
1733 if (dwarf2_die_debug)
1734 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
1736 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1738 unsigned int offset;
1739 unsigned int offset_size;
1740 unsigned int type_offset;
1741 unsigned int length, initial_length_size;
1742 unsigned short version;
1744 struct signatured_type *type_sig;
1746 gdb_byte *ptr = info_ptr;
1748 offset = ptr - dwarf2_per_objfile->types.buffer;
1750 /* We need to read the type's signature in order to build the hash
1751 table, but we don't need to read anything else just yet. */
1753 /* Sanity check to ensure entire cu is present. */
1754 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
1755 if (ptr + length + initial_length_size
1756 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1758 complaint (&symfile_complaints,
1759 _("debug type entry runs off end of `.debug_types' section, ignored"));
1763 offset_size = initial_length_size == 4 ? 4 : 8;
1764 ptr += initial_length_size;
1765 version = bfd_get_16 (objfile->obfd, ptr);
1767 ptr += offset_size; /* abbrev offset */
1768 ptr += 1; /* address size */
1769 signature = bfd_get_64 (objfile->obfd, ptr);
1771 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
1773 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
1774 memset (type_sig, 0, sizeof (*type_sig));
1775 type_sig->signature = signature;
1776 type_sig->offset = offset;
1777 type_sig->type_offset = type_offset;
1779 slot = htab_find_slot (types_htab, type_sig, INSERT);
1780 gdb_assert (slot != NULL);
1783 if (dwarf2_die_debug)
1784 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
1785 offset, phex (signature, sizeof (signature)));
1787 info_ptr = info_ptr + initial_length_size + length;
1790 dwarf2_per_objfile->signatured_types = types_htab;
1795 /* Lookup a signature based type.
1796 Returns NULL if SIG is not present in the table. */
1798 static struct signatured_type *
1799 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
1801 struct signatured_type find_entry, *entry;
1803 if (dwarf2_per_objfile->signatured_types == NULL)
1805 complaint (&symfile_complaints,
1806 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1810 find_entry.signature = sig;
1811 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
1815 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1816 to combine the common parts.
1817 Process a compilation unit for a psymtab.
1818 BUFFER is a pointer to the beginning of the dwarf section buffer,
1819 either .debug_info or debug_types.
1820 INFO_PTR is a pointer to the start of the CU.
1821 Returns a pointer to the next CU. */
1824 process_psymtab_comp_unit (struct objfile *objfile,
1825 struct dwarf2_per_cu_data *this_cu,
1826 gdb_byte *buffer, gdb_byte *info_ptr,
1827 unsigned int buffer_size)
1829 bfd *abfd = objfile->obfd;
1830 gdb_byte *beg_of_comp_unit = info_ptr;
1831 struct partial_die_info comp_unit_die;
1832 struct partial_symtab *pst;
1834 struct cleanup *back_to_inner;
1835 struct dwarf2_cu cu;
1836 struct abbrev_info *abbrev;
1837 unsigned int bytes_read;
1839 memset (&cu, 0, sizeof (cu));
1840 cu.objfile = objfile;
1841 obstack_init (&cu.comp_unit_obstack);
1843 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1845 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
1846 buffer, buffer_size,
1849 /* Complete the cu_header. */
1850 cu.header.offset = beg_of_comp_unit - buffer;
1851 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
1853 cu.list_in_scope = &file_symbols;
1855 /* Read the abbrevs for this compilation unit into a table. */
1856 dwarf2_read_abbrevs (abfd, &cu);
1857 make_cleanup (dwarf2_free_abbrev_table, &cu);
1859 /* Read the compilation unit die. */
1860 if (this_cu->from_debug_types)
1861 info_ptr += 8 /*signature*/ + cu.header.offset_size;
1862 abbrev = peek_die_abbrev (info_ptr, &bytes_read, &cu);
1863 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, abfd,
1864 buffer, info_ptr, &cu);
1866 if (this_cu->from_debug_types)
1868 /* offset,length haven't been set yet for type units. */
1869 this_cu->offset = cu.header.offset;
1870 this_cu->length = cu.header.length + cu.header.initial_length_size;
1872 else if (comp_unit_die.tag == DW_TAG_partial_unit)
1874 info_ptr = (beg_of_comp_unit + cu.header.length
1875 + cu.header.initial_length_size);
1876 do_cleanups (back_to_inner);
1880 /* Set the language we're debugging. */
1881 set_cu_language (comp_unit_die.language, &cu);
1883 /* Allocate a new partial symbol table structure. */
1884 pst = start_psymtab_common (objfile, objfile->section_offsets,
1885 comp_unit_die.name ? comp_unit_die.name : "",
1886 /* TEXTLOW and TEXTHIGH are set below. */
1888 objfile->global_psymbols.next,
1889 objfile->static_psymbols.next);
1891 if (comp_unit_die.dirname)
1892 pst->dirname = obsavestring (comp_unit_die.dirname,
1893 strlen (comp_unit_die.dirname),
1894 &objfile->objfile_obstack);
1896 pst->read_symtab_private = (char *) this_cu;
1898 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1900 /* Store the function that reads in the rest of the symbol table */
1901 pst->read_symtab = dwarf2_psymtab_to_symtab;
1903 /* If this compilation unit was already read in, free the
1904 cached copy in order to read it in again. This is
1905 necessary because we skipped some symbols when we first
1906 read in the compilation unit (see load_partial_dies).
1907 This problem could be avoided, but the benefit is
1909 if (this_cu->cu != NULL)
1910 free_one_cached_comp_unit (this_cu->cu);
1912 cu.per_cu = this_cu;
1914 /* Note that this is a pointer to our stack frame, being
1915 added to a global data structure. It will be cleaned up
1916 in free_stack_comp_unit when we finish with this
1917 compilation unit. */
1920 this_cu->psymtab = pst;
1922 /* Possibly set the default values of LOWPC and HIGHPC from
1924 if (cu.has_ranges_offset)
1926 if (dwarf2_ranges_read (cu.ranges_offset, &comp_unit_die.lowpc,
1927 &comp_unit_die.highpc, &cu, pst))
1928 comp_unit_die.has_pc_info = 1;
1930 else if (comp_unit_die.has_pc_info
1931 && comp_unit_die.lowpc < comp_unit_die.highpc)
1932 /* Store the contiguous range if it is not empty; it can be empty for
1933 CUs with no code. */
1934 addrmap_set_empty (objfile->psymtabs_addrmap,
1935 comp_unit_die.lowpc + baseaddr,
1936 comp_unit_die.highpc + baseaddr - 1, pst);
1938 /* Check if comp unit has_children.
1939 If so, read the rest of the partial symbols from this comp unit.
1940 If not, there's no more debug_info for this comp unit. */
1941 if (comp_unit_die.has_children)
1943 struct partial_die_info *first_die;
1944 CORE_ADDR lowpc, highpc;
1946 lowpc = ((CORE_ADDR) -1);
1947 highpc = ((CORE_ADDR) 0);
1949 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
1951 scan_partial_symbols (first_die, &lowpc, &highpc,
1952 ! comp_unit_die.has_pc_info, &cu);
1954 /* If we didn't find a lowpc, set it to highpc to avoid
1955 complaints from `maint check'. */
1956 if (lowpc == ((CORE_ADDR) -1))
1959 /* If the compilation unit didn't have an explicit address range,
1960 then use the information extracted from its child dies. */
1961 if (! comp_unit_die.has_pc_info)
1963 comp_unit_die.lowpc = lowpc;
1964 comp_unit_die.highpc = highpc;
1967 pst->textlow = comp_unit_die.lowpc + baseaddr;
1968 pst->texthigh = comp_unit_die.highpc + baseaddr;
1970 pst->n_global_syms = objfile->global_psymbols.next -
1971 (objfile->global_psymbols.list + pst->globals_offset);
1972 pst->n_static_syms = objfile->static_psymbols.next -
1973 (objfile->static_psymbols.list + pst->statics_offset);
1974 sort_pst_symbols (pst);
1976 /* If there is already a psymtab or symtab for a file of this
1977 name, remove it. (If there is a symtab, more drastic things
1978 also happen.) This happens in VxWorks. */
1979 if (! this_cu->from_debug_types)
1980 free_named_symtabs (pst->filename);
1982 info_ptr = (beg_of_comp_unit + cu.header.length
1983 + cu.header.initial_length_size);
1985 if (this_cu->from_debug_types)
1987 /* It's not clear we want to do anything with stmt lists here.
1988 Waiting to see what gcc ultimately does. */
1990 else if (comp_unit_die.has_stmt_list)
1992 /* Get the list of files included in the current compilation unit,
1993 and build a psymtab for each of them. */
1994 dwarf2_build_include_psymtabs (&cu, &comp_unit_die, pst);
1997 do_cleanups (back_to_inner);
2002 /* Traversal function for htab_traverse_noresize.
2003 Process one .debug_types comp-unit. */
2006 process_type_comp_unit (void **slot, void *info)
2008 struct signatured_type *entry = (struct signatured_type *) *slot;
2009 struct objfile *objfile = (struct objfile *) info;
2010 struct dwarf2_per_cu_data *this_cu;
2012 this_cu = &entry->per_cu;
2013 this_cu->from_debug_types = 1;
2015 process_psymtab_comp_unit (objfile, this_cu,
2016 dwarf2_per_objfile->types.buffer,
2017 dwarf2_per_objfile->types.buffer + entry->offset,
2018 dwarf2_per_objfile->types.size);
2023 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2024 Build partial symbol tables for the .debug_types comp-units. */
2027 build_type_psymtabs (struct objfile *objfile)
2029 if (! create_debug_types_hash_table (objfile))
2032 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
2033 process_type_comp_unit, objfile);
2036 /* Build the partial symbol table by doing a quick pass through the
2037 .debug_info and .debug_abbrev sections. */
2040 dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
2042 /* Instead of reading this into a big buffer, we should probably use
2043 mmap() on architectures that support it. (FIXME) */
2044 bfd *abfd = objfile->obfd;
2046 struct cleanup *back_to;
2048 info_ptr = dwarf2_per_objfile->info.buffer;
2050 /* Any cached compilation units will be linked by the per-objfile
2051 read_in_chain. Make sure to free them when we're done. */
2052 back_to = make_cleanup (free_cached_comp_units, NULL);
2054 build_type_psymtabs (objfile);
2056 create_all_comp_units (objfile);
2058 objfile->psymtabs_addrmap =
2059 addrmap_create_mutable (&objfile->objfile_obstack);
2061 /* Since the objects we're extracting from .debug_info vary in
2062 length, only the individual functions to extract them (like
2063 read_comp_unit_head and load_partial_die) can really know whether
2064 the buffer is large enough to hold another complete object.
2066 At the moment, they don't actually check that. If .debug_info
2067 holds just one extra byte after the last compilation unit's dies,
2068 then read_comp_unit_head will happily read off the end of the
2069 buffer. read_partial_die is similarly casual. Those functions
2072 For this loop condition, simply checking whether there's any data
2073 left at all should be sufficient. */
2075 while (info_ptr < (dwarf2_per_objfile->info.buffer
2076 + dwarf2_per_objfile->info.size))
2078 struct dwarf2_per_cu_data *this_cu;
2080 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
2083 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
2084 dwarf2_per_objfile->info.buffer,
2086 dwarf2_per_objfile->info.size);
2089 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
2090 &objfile->objfile_obstack);
2092 do_cleanups (back_to);
2095 /* Load the partial DIEs for a secondary CU into memory. */
2098 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
2099 struct objfile *objfile)
2101 bfd *abfd = objfile->obfd;
2102 gdb_byte *info_ptr, *beg_of_comp_unit;
2103 struct partial_die_info comp_unit_die;
2104 struct dwarf2_cu *cu;
2105 struct abbrev_info *abbrev;
2106 unsigned int bytes_read;
2107 struct cleanup *back_to;
2109 gdb_assert (! this_cu->from_debug_types);
2111 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
2112 beg_of_comp_unit = info_ptr;
2114 cu = alloc_one_comp_unit (objfile);
2116 /* ??? Missing cleanup for CU? */
2118 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
2119 dwarf2_per_objfile->info.buffer,
2120 dwarf2_per_objfile->info.size,
2123 /* Complete the cu_header. */
2124 cu->header.offset = this_cu->offset;
2125 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
2127 /* Read the abbrevs for this compilation unit into a table. */
2128 dwarf2_read_abbrevs (abfd, cu);
2129 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2131 /* Read the compilation unit die. */
2132 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2133 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read, abfd,
2134 dwarf2_per_objfile->info.buffer, info_ptr, cu);
2136 /* Set the language we're debugging. */
2137 set_cu_language (comp_unit_die.language, cu);
2139 /* Link this compilation unit into the compilation unit tree. */
2141 cu->per_cu = this_cu;
2142 cu->type_hash = this_cu->type_hash;
2144 /* Check if comp unit has_children.
2145 If so, read the rest of the partial symbols from this comp unit.
2146 If not, there's no more debug_info for this comp unit. */
2147 if (comp_unit_die.has_children)
2148 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
2150 do_cleanups (back_to);
2153 /* Create a list of all compilation units in OBJFILE. We do this only
2154 if an inter-comp-unit reference is found; presumably if there is one,
2155 there will be many, and one will occur early in the .debug_info section.
2156 So there's no point in building this list incrementally. */
2159 create_all_comp_units (struct objfile *objfile)
2163 struct dwarf2_per_cu_data **all_comp_units;
2164 gdb_byte *info_ptr = dwarf2_per_objfile->info.buffer;
2168 all_comp_units = xmalloc (n_allocated
2169 * sizeof (struct dwarf2_per_cu_data *));
2171 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
2173 unsigned int length, initial_length_size;
2174 gdb_byte *beg_of_comp_unit;
2175 struct dwarf2_per_cu_data *this_cu;
2176 unsigned int offset;
2178 offset = info_ptr - dwarf2_per_objfile->info.buffer;
2180 /* Read just enough information to find out where the next
2181 compilation unit is. */
2182 length = read_initial_length (objfile->obfd, info_ptr,
2183 &initial_length_size);
2185 /* Save the compilation unit for later lookup. */
2186 this_cu = obstack_alloc (&objfile->objfile_obstack,
2187 sizeof (struct dwarf2_per_cu_data));
2188 memset (this_cu, 0, sizeof (*this_cu));
2189 this_cu->offset = offset;
2190 this_cu->length = length + initial_length_size;
2192 if (n_comp_units == n_allocated)
2195 all_comp_units = xrealloc (all_comp_units,
2197 * sizeof (struct dwarf2_per_cu_data *));
2199 all_comp_units[n_comp_units++] = this_cu;
2201 info_ptr = info_ptr + this_cu->length;
2204 dwarf2_per_objfile->all_comp_units
2205 = obstack_alloc (&objfile->objfile_obstack,
2206 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2207 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
2208 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2209 xfree (all_comp_units);
2210 dwarf2_per_objfile->n_comp_units = n_comp_units;
2213 /* Process all loaded DIEs for compilation unit CU, starting at
2214 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2215 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2216 DW_AT_ranges). If NEED_PC is set, then this function will set
2217 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2218 and record the covered ranges in the addrmap. */
2221 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
2222 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2224 struct objfile *objfile = cu->objfile;
2225 bfd *abfd = objfile->obfd;
2226 struct partial_die_info *pdi;
2228 /* Now, march along the PDI's, descending into ones which have
2229 interesting children but skipping the children of the other ones,
2230 until we reach the end of the compilation unit. */
2236 fixup_partial_die (pdi, cu);
2238 /* Anonymous namespaces have no name but have interesting
2239 children, so we need to look at them. Ditto for anonymous
2242 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
2243 || pdi->tag == DW_TAG_enumeration_type)
2247 case DW_TAG_subprogram:
2248 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2250 case DW_TAG_variable:
2251 case DW_TAG_typedef:
2252 case DW_TAG_union_type:
2253 if (!pdi->is_declaration)
2255 add_partial_symbol (pdi, cu);
2258 case DW_TAG_class_type:
2259 case DW_TAG_interface_type:
2260 case DW_TAG_structure_type:
2261 if (!pdi->is_declaration)
2263 add_partial_symbol (pdi, cu);
2266 case DW_TAG_enumeration_type:
2267 if (!pdi->is_declaration)
2268 add_partial_enumeration (pdi, cu);
2270 case DW_TAG_base_type:
2271 case DW_TAG_subrange_type:
2272 /* File scope base type definitions are added to the partial
2274 add_partial_symbol (pdi, cu);
2276 case DW_TAG_namespace:
2277 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
2280 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
2287 /* If the die has a sibling, skip to the sibling. */
2289 pdi = pdi->die_sibling;
2293 /* Functions used to compute the fully scoped name of a partial DIE.
2295 Normally, this is simple. For C++, the parent DIE's fully scoped
2296 name is concatenated with "::" and the partial DIE's name. For
2297 Java, the same thing occurs except that "." is used instead of "::".
2298 Enumerators are an exception; they use the scope of their parent
2299 enumeration type, i.e. the name of the enumeration type is not
2300 prepended to the enumerator.
2302 There are two complexities. One is DW_AT_specification; in this
2303 case "parent" means the parent of the target of the specification,
2304 instead of the direct parent of the DIE. The other is compilers
2305 which do not emit DW_TAG_namespace; in this case we try to guess
2306 the fully qualified name of structure types from their members'
2307 linkage names. This must be done using the DIE's children rather
2308 than the children of any DW_AT_specification target. We only need
2309 to do this for structures at the top level, i.e. if the target of
2310 any DW_AT_specification (if any; otherwise the DIE itself) does not
2313 /* Compute the scope prefix associated with PDI's parent, in
2314 compilation unit CU. The result will be allocated on CU's
2315 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2316 field. NULL is returned if no prefix is necessary. */
2318 partial_die_parent_scope (struct partial_die_info *pdi,
2319 struct dwarf2_cu *cu)
2321 char *grandparent_scope;
2322 struct partial_die_info *parent, *real_pdi;
2324 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2325 then this means the parent of the specification DIE. */
2328 while (real_pdi->has_specification)
2329 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2331 parent = real_pdi->die_parent;
2335 if (parent->scope_set)
2336 return parent->scope;
2338 fixup_partial_die (parent, cu);
2340 grandparent_scope = partial_die_parent_scope (parent, cu);
2342 if (parent->tag == DW_TAG_namespace
2343 || parent->tag == DW_TAG_structure_type
2344 || parent->tag == DW_TAG_class_type
2345 || parent->tag == DW_TAG_interface_type
2346 || parent->tag == DW_TAG_union_type)
2348 if (grandparent_scope == NULL)
2349 parent->scope = parent->name;
2351 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
2354 else if (parent->tag == DW_TAG_enumeration_type)
2355 /* Enumerators should not get the name of the enumeration as a prefix. */
2356 parent->scope = grandparent_scope;
2359 /* FIXME drow/2004-04-01: What should we be doing with
2360 function-local names? For partial symbols, we should probably be
2362 complaint (&symfile_complaints,
2363 _("unhandled containing DIE tag %d for DIE at %d"),
2364 parent->tag, pdi->offset);
2365 parent->scope = grandparent_scope;
2368 parent->scope_set = 1;
2369 return parent->scope;
2372 /* Return the fully scoped name associated with PDI, from compilation unit
2373 CU. The result will be allocated with malloc. */
2375 partial_die_full_name (struct partial_die_info *pdi,
2376 struct dwarf2_cu *cu)
2380 parent_scope = partial_die_parent_scope (pdi, cu);
2381 if (parent_scope == NULL)
2384 return typename_concat (NULL, parent_scope, pdi->name, cu);
2388 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
2390 struct objfile *objfile = cu->objfile;
2392 char *actual_name = NULL;
2393 const char *my_prefix;
2394 const struct partial_symbol *psym = NULL;
2396 int built_actual_name = 0;
2398 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2400 if (pdi_needs_namespace (pdi->tag))
2402 actual_name = partial_die_full_name (pdi, cu);
2404 built_actual_name = 1;
2407 if (actual_name == NULL)
2408 actual_name = pdi->name;
2412 case DW_TAG_subprogram:
2413 if (pdi->is_external || cu->language == language_ada)
2415 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2416 of the global scope. But in Ada, we want to be able to access
2417 nested procedures globally. So all Ada subprograms are stored
2418 in the global scope. */
2419 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2420 mst_text, objfile); */
2421 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2422 VAR_DOMAIN, LOC_BLOCK,
2423 &objfile->global_psymbols,
2424 0, pdi->lowpc + baseaddr,
2425 cu->language, objfile);
2429 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2430 mst_file_text, objfile); */
2431 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2432 VAR_DOMAIN, LOC_BLOCK,
2433 &objfile->static_psymbols,
2434 0, pdi->lowpc + baseaddr,
2435 cu->language, objfile);
2438 case DW_TAG_variable:
2439 if (pdi->is_external)
2442 Don't enter into the minimal symbol tables as there is
2443 a minimal symbol table entry from the ELF symbols already.
2444 Enter into partial symbol table if it has a location
2445 descriptor or a type.
2446 If the location descriptor is missing, new_symbol will create
2447 a LOC_UNRESOLVED symbol, the address of the variable will then
2448 be determined from the minimal symbol table whenever the variable
2450 The address for the partial symbol table entry is not
2451 used by GDB, but it comes in handy for debugging partial symbol
2455 addr = decode_locdesc (pdi->locdesc, cu);
2456 if (pdi->locdesc || pdi->has_type)
2457 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2458 VAR_DOMAIN, LOC_STATIC,
2459 &objfile->global_psymbols,
2461 cu->language, objfile);
2465 /* Static Variable. Skip symbols without location descriptors. */
2466 if (pdi->locdesc == NULL)
2468 if (built_actual_name)
2469 xfree (actual_name);
2472 addr = decode_locdesc (pdi->locdesc, cu);
2473 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2474 mst_file_data, objfile); */
2475 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2476 VAR_DOMAIN, LOC_STATIC,
2477 &objfile->static_psymbols,
2479 cu->language, objfile);
2482 case DW_TAG_typedef:
2483 case DW_TAG_base_type:
2484 case DW_TAG_subrange_type:
2485 add_psymbol_to_list (actual_name, strlen (actual_name),
2486 VAR_DOMAIN, LOC_TYPEDEF,
2487 &objfile->static_psymbols,
2488 0, (CORE_ADDR) 0, cu->language, objfile);
2490 case DW_TAG_namespace:
2491 add_psymbol_to_list (actual_name, strlen (actual_name),
2492 VAR_DOMAIN, LOC_TYPEDEF,
2493 &objfile->global_psymbols,
2494 0, (CORE_ADDR) 0, cu->language, objfile);
2496 case DW_TAG_class_type:
2497 case DW_TAG_interface_type:
2498 case DW_TAG_structure_type:
2499 case DW_TAG_union_type:
2500 case DW_TAG_enumeration_type:
2501 /* Skip external references. The DWARF standard says in the section
2502 about "Structure, Union, and Class Type Entries": "An incomplete
2503 structure, union or class type is represented by a structure,
2504 union or class entry that does not have a byte size attribute
2505 and that has a DW_AT_declaration attribute." */
2506 if (!pdi->has_byte_size && pdi->is_declaration)
2508 if (built_actual_name)
2509 xfree (actual_name);
2513 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2514 static vs. global. */
2515 add_psymbol_to_list (actual_name, strlen (actual_name),
2516 STRUCT_DOMAIN, LOC_TYPEDEF,
2517 (cu->language == language_cplus
2518 || cu->language == language_java)
2519 ? &objfile->global_psymbols
2520 : &objfile->static_psymbols,
2521 0, (CORE_ADDR) 0, cu->language, objfile);
2524 case DW_TAG_enumerator:
2525 add_psymbol_to_list (actual_name, strlen (actual_name),
2526 VAR_DOMAIN, LOC_CONST,
2527 (cu->language == language_cplus
2528 || cu->language == language_java)
2529 ? &objfile->global_psymbols
2530 : &objfile->static_psymbols,
2531 0, (CORE_ADDR) 0, cu->language, objfile);
2537 /* Check to see if we should scan the name for possible namespace
2538 info. Only do this if this is C++, if we don't have namespace
2539 debugging info in the file, if the psym is of an appropriate type
2540 (otherwise we'll have psym == NULL), and if we actually had a
2541 mangled name to begin with. */
2543 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2544 cases which do not set PSYM above? */
2546 if (cu->language == language_cplus
2547 && cu->has_namespace_info == 0
2549 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
2550 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
2553 if (built_actual_name)
2554 xfree (actual_name);
2557 /* Determine whether a die of type TAG living in a C++ class or
2558 namespace needs to have the name of the scope prepended to the
2559 name listed in the die. */
2562 pdi_needs_namespace (enum dwarf_tag tag)
2566 case DW_TAG_namespace:
2567 case DW_TAG_typedef:
2568 case DW_TAG_class_type:
2569 case DW_TAG_interface_type:
2570 case DW_TAG_structure_type:
2571 case DW_TAG_union_type:
2572 case DW_TAG_enumeration_type:
2573 case DW_TAG_enumerator:
2580 /* Read a partial die corresponding to a namespace; also, add a symbol
2581 corresponding to that namespace to the symbol table. NAMESPACE is
2582 the name of the enclosing namespace. */
2585 add_partial_namespace (struct partial_die_info *pdi,
2586 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2587 int need_pc, struct dwarf2_cu *cu)
2589 struct objfile *objfile = cu->objfile;
2591 /* Add a symbol for the namespace. */
2593 add_partial_symbol (pdi, cu);
2595 /* Now scan partial symbols in that namespace. */
2597 if (pdi->has_children)
2598 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2601 /* Read a partial die corresponding to a Fortran module. */
2604 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
2605 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2607 /* Now scan partial symbols in that module.
2609 FIXME: Support the separate Fortran module namespaces. */
2611 if (pdi->has_children)
2612 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2615 /* Read a partial die corresponding to a subprogram and create a partial
2616 symbol for that subprogram. When the CU language allows it, this
2617 routine also defines a partial symbol for each nested subprogram
2618 that this subprogram contains.
2620 DIE my also be a lexical block, in which case we simply search
2621 recursively for suprograms defined inside that lexical block.
2622 Again, this is only performed when the CU language allows this
2623 type of definitions. */
2626 add_partial_subprogram (struct partial_die_info *pdi,
2627 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2628 int need_pc, struct dwarf2_cu *cu)
2630 if (pdi->tag == DW_TAG_subprogram)
2632 if (pdi->has_pc_info)
2634 if (pdi->lowpc < *lowpc)
2635 *lowpc = pdi->lowpc;
2636 if (pdi->highpc > *highpc)
2637 *highpc = pdi->highpc;
2641 struct objfile *objfile = cu->objfile;
2643 baseaddr = ANOFFSET (objfile->section_offsets,
2644 SECT_OFF_TEXT (objfile));
2645 addrmap_set_empty (objfile->psymtabs_addrmap,
2646 pdi->lowpc, pdi->highpc - 1,
2647 cu->per_cu->psymtab);
2649 if (!pdi->is_declaration)
2650 add_partial_symbol (pdi, cu);
2654 if (! pdi->has_children)
2657 if (cu->language == language_ada)
2659 pdi = pdi->die_child;
2662 fixup_partial_die (pdi, cu);
2663 if (pdi->tag == DW_TAG_subprogram
2664 || pdi->tag == DW_TAG_lexical_block)
2665 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2666 pdi = pdi->die_sibling;
2671 /* See if we can figure out if the class lives in a namespace. We do
2672 this by looking for a member function; its demangled name will
2673 contain namespace info, if there is any. */
2676 guess_structure_name (struct partial_die_info *struct_pdi,
2677 struct dwarf2_cu *cu)
2679 if ((cu->language == language_cplus
2680 || cu->language == language_java)
2681 && cu->has_namespace_info == 0
2682 && struct_pdi->has_children)
2684 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2685 what template types look like, because the demangler
2686 frequently doesn't give the same name as the debug info. We
2687 could fix this by only using the demangled name to get the
2688 prefix (but see comment in read_structure_type). */
2690 struct partial_die_info *child_pdi = struct_pdi->die_child;
2691 struct partial_die_info *real_pdi;
2693 /* If this DIE (this DIE's specification, if any) has a parent, then
2694 we should not do this. We'll prepend the parent's fully qualified
2695 name when we create the partial symbol. */
2697 real_pdi = struct_pdi;
2698 while (real_pdi->has_specification)
2699 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2701 if (real_pdi->die_parent != NULL)
2704 while (child_pdi != NULL)
2706 if (child_pdi->tag == DW_TAG_subprogram)
2708 char *actual_class_name
2709 = language_class_name_from_physname (cu->language_defn,
2711 if (actual_class_name != NULL)
2714 = obsavestring (actual_class_name,
2715 strlen (actual_class_name),
2716 &cu->comp_unit_obstack);
2717 xfree (actual_class_name);
2722 child_pdi = child_pdi->die_sibling;
2727 /* Read a partial die corresponding to an enumeration type. */
2730 add_partial_enumeration (struct partial_die_info *enum_pdi,
2731 struct dwarf2_cu *cu)
2733 struct objfile *objfile = cu->objfile;
2734 bfd *abfd = objfile->obfd;
2735 struct partial_die_info *pdi;
2737 if (enum_pdi->name != NULL)
2738 add_partial_symbol (enum_pdi, cu);
2740 pdi = enum_pdi->die_child;
2743 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2744 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2746 add_partial_symbol (pdi, cu);
2747 pdi = pdi->die_sibling;
2751 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2752 Return the corresponding abbrev, or NULL if the number is zero (indicating
2753 an empty DIE). In either case *BYTES_READ will be set to the length of
2754 the initial number. */
2756 static struct abbrev_info *
2757 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2758 struct dwarf2_cu *cu)
2760 bfd *abfd = cu->objfile->obfd;
2761 unsigned int abbrev_number;
2762 struct abbrev_info *abbrev;
2764 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2766 if (abbrev_number == 0)
2769 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2772 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2773 bfd_get_filename (abfd));
2779 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2780 Returns a pointer to the end of a series of DIEs, terminated by an empty
2781 DIE. Any children of the skipped DIEs will also be skipped. */
2784 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
2786 struct abbrev_info *abbrev;
2787 unsigned int bytes_read;
2791 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2793 return info_ptr + bytes_read;
2795 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
2799 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2800 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2801 abbrev corresponding to that skipped uleb128 should be passed in
2802 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2806 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
2807 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
2809 unsigned int bytes_read;
2810 struct attribute attr;
2811 bfd *abfd = cu->objfile->obfd;
2812 unsigned int form, i;
2814 for (i = 0; i < abbrev->num_attrs; i++)
2816 /* The only abbrev we care about is DW_AT_sibling. */
2817 if (abbrev->attrs[i].name == DW_AT_sibling)
2819 read_attribute (&attr, &abbrev->attrs[i],
2820 abfd, info_ptr, cu);
2821 if (attr.form == DW_FORM_ref_addr)
2822 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2824 return buffer + dwarf2_get_ref_die_offset (&attr);
2827 /* If it isn't DW_AT_sibling, skip this attribute. */
2828 form = abbrev->attrs[i].form;
2833 case DW_FORM_ref_addr:
2834 info_ptr += cu->header.addr_size;
2854 case DW_FORM_string:
2855 read_string (abfd, info_ptr, &bytes_read);
2856 info_ptr += bytes_read;
2859 info_ptr += cu->header.offset_size;
2862 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2863 info_ptr += bytes_read;
2865 case DW_FORM_block1:
2866 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2868 case DW_FORM_block2:
2869 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2871 case DW_FORM_block4:
2872 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2876 case DW_FORM_ref_udata:
2877 info_ptr = skip_leb128 (abfd, info_ptr);
2879 case DW_FORM_indirect:
2880 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2881 info_ptr += bytes_read;
2882 /* We need to continue parsing from here, so just go back to
2884 goto skip_attribute;
2887 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2888 dwarf_form_name (form),
2889 bfd_get_filename (abfd));
2893 if (abbrev->has_children)
2894 return skip_children (buffer, info_ptr, cu);
2899 /* Locate ORIG_PDI's sibling.
2900 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2904 locate_pdi_sibling (struct partial_die_info *orig_pdi,
2905 gdb_byte *buffer, gdb_byte *info_ptr,
2906 bfd *abfd, struct dwarf2_cu *cu)
2908 /* Do we know the sibling already? */
2910 if (orig_pdi->sibling)
2911 return orig_pdi->sibling;
2913 /* Are there any children to deal with? */
2915 if (!orig_pdi->has_children)
2918 /* Skip the children the long way. */
2920 return skip_children (buffer, info_ptr, cu);
2923 /* Expand this partial symbol table into a full symbol table. */
2926 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2928 /* FIXME: This is barely more than a stub. */
2933 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2939 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2940 gdb_flush (gdb_stdout);
2943 /* Restore our global data. */
2944 dwarf2_per_objfile = objfile_data (pst->objfile,
2945 dwarf2_objfile_data_key);
2947 /* If this psymtab is constructed from a debug-only objfile, the
2948 has_section_at_zero flag will not necessarily be correct. We
2949 can get the correct value for this flag by looking at the data
2950 associated with the (presumably stripped) associated objfile. */
2951 if (pst->objfile->separate_debug_objfile_backlink)
2953 struct dwarf2_per_objfile *dpo_backlink
2954 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
2955 dwarf2_objfile_data_key);
2956 dwarf2_per_objfile->has_section_at_zero
2957 = dpo_backlink->has_section_at_zero;
2960 psymtab_to_symtab_1 (pst);
2962 /* Finish up the debug error message. */
2964 printf_filtered (_("done.\n"));
2969 /* Add PER_CU to the queue. */
2972 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
2974 struct dwarf2_queue_item *item;
2977 item = xmalloc (sizeof (*item));
2978 item->per_cu = per_cu;
2981 if (dwarf2_queue == NULL)
2982 dwarf2_queue = item;
2984 dwarf2_queue_tail->next = item;
2986 dwarf2_queue_tail = item;
2989 /* Process the queue. */
2992 process_queue (struct objfile *objfile)
2994 struct dwarf2_queue_item *item, *next_item;
2996 /* The queue starts out with one item, but following a DIE reference
2997 may load a new CU, adding it to the end of the queue. */
2998 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
3000 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
3001 process_full_comp_unit (item->per_cu);
3003 item->per_cu->queued = 0;
3004 next_item = item->next;
3008 dwarf2_queue_tail = NULL;
3011 /* Free all allocated queue entries. This function only releases anything if
3012 an error was thrown; if the queue was processed then it would have been
3013 freed as we went along. */
3016 dwarf2_release_queue (void *dummy)
3018 struct dwarf2_queue_item *item, *last;
3020 item = dwarf2_queue;
3023 /* Anything still marked queued is likely to be in an
3024 inconsistent state, so discard it. */
3025 if (item->per_cu->queued)
3027 if (item->per_cu->cu != NULL)
3028 free_one_cached_comp_unit (item->per_cu->cu);
3029 item->per_cu->queued = 0;
3037 dwarf2_queue = dwarf2_queue_tail = NULL;
3040 /* Read in full symbols for PST, and anything it depends on. */
3043 psymtab_to_symtab_1 (struct partial_symtab *pst)
3045 struct dwarf2_per_cu_data *per_cu;
3046 struct cleanup *back_to;
3049 for (i = 0; i < pst->number_of_dependencies; i++)
3050 if (!pst->dependencies[i]->readin)
3052 /* Inform about additional files that need to be read in. */
3055 /* FIXME: i18n: Need to make this a single string. */
3056 fputs_filtered (" ", gdb_stdout);
3058 fputs_filtered ("and ", gdb_stdout);
3060 printf_filtered ("%s...", pst->dependencies[i]->filename);
3061 wrap_here (""); /* Flush output */
3062 gdb_flush (gdb_stdout);
3064 psymtab_to_symtab_1 (pst->dependencies[i]);
3067 per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
3071 /* It's an include file, no symbols to read for it.
3072 Everything is in the parent symtab. */
3077 back_to = make_cleanup (dwarf2_release_queue, NULL);
3079 queue_comp_unit (per_cu, pst->objfile);
3081 if (per_cu->from_debug_types)
3082 read_signatured_type_at_offset (pst->objfile, per_cu->offset);
3084 load_full_comp_unit (per_cu, pst->objfile);
3086 process_queue (pst->objfile);
3088 /* Age the cache, releasing compilation units that have not
3089 been used recently. */
3090 age_cached_comp_units ();
3092 do_cleanups (back_to);
3095 /* Load the DIEs associated with PER_CU into memory. */
3098 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3100 bfd *abfd = objfile->obfd;
3101 struct dwarf2_cu *cu;
3102 unsigned int offset;
3103 gdb_byte *info_ptr, *beg_of_comp_unit;
3104 struct cleanup *back_to, *free_cu_cleanup;
3105 struct attribute *attr;
3108 gdb_assert (! per_cu->from_debug_types);
3110 /* Set local variables from the partial symbol table info. */
3111 offset = per_cu->offset;
3113 info_ptr = dwarf2_per_objfile->info.buffer + offset;
3114 beg_of_comp_unit = info_ptr;
3116 cu = alloc_one_comp_unit (objfile);
3118 /* If an error occurs while loading, release our storage. */
3119 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3121 /* Read in the comp_unit header. */
3122 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
3124 /* Complete the cu_header. */
3125 cu->header.offset = offset;
3126 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3128 /* Read the abbrevs for this compilation unit. */
3129 dwarf2_read_abbrevs (abfd, cu);
3130 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
3132 /* Link this compilation unit into the compilation unit tree. */
3134 cu->per_cu = per_cu;
3135 cu->type_hash = per_cu->type_hash;
3137 cu->dies = read_comp_unit (info_ptr, cu);
3139 /* We try not to read any attributes in this function, because not
3140 all objfiles needed for references have been loaded yet, and symbol
3141 table processing isn't initialized. But we have to set the CU language,
3142 or we won't be able to build types correctly. */
3143 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
3145 set_cu_language (DW_UNSND (attr), cu);
3147 set_cu_language (language_minimal, cu);
3149 /* Link this CU into read_in_chain. */
3150 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3151 dwarf2_per_objfile->read_in_chain = per_cu;
3153 do_cleanups (back_to);
3155 /* We've successfully allocated this compilation unit. Let our caller
3156 clean it up when finished with it. */
3157 discard_cleanups (free_cu_cleanup);
3160 /* Generate full symbol information for PST and CU, whose DIEs have
3161 already been loaded into memory. */
3164 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
3166 struct partial_symtab *pst = per_cu->psymtab;
3167 struct dwarf2_cu *cu = per_cu->cu;
3168 struct objfile *objfile = pst->objfile;
3169 bfd *abfd = objfile->obfd;
3170 CORE_ADDR lowpc, highpc;
3171 struct symtab *symtab;
3172 struct cleanup *back_to;
3173 struct attribute *attr;
3176 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3179 back_to = make_cleanup (really_free_pendings, NULL);
3181 cu->list_in_scope = &file_symbols;
3183 /* Find the base address of the compilation unit for range lists and
3184 location lists. It will normally be specified by DW_AT_low_pc.
3185 In DWARF-3 draft 4, the base address could be overridden by
3186 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3187 compilation units with discontinuous ranges. */
3190 cu->base_address = 0;
3192 attr = dwarf2_attr (cu->dies, DW_AT_entry_pc, cu);
3195 cu->base_address = DW_ADDR (attr);
3200 attr = dwarf2_attr (cu->dies, DW_AT_low_pc, cu);
3203 cu->base_address = DW_ADDR (attr);
3208 /* Do line number decoding in read_file_scope () */
3209 process_die (cu->dies, cu);
3211 /* Some compilers don't define a DW_AT_high_pc attribute for the
3212 compilation unit. If the DW_AT_high_pc is missing, synthesize
3213 it, by scanning the DIE's below the compilation unit. */
3214 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
3216 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
3218 /* Set symtab language to language from DW_AT_language.
3219 If the compilation is from a C file generated by language preprocessors,
3220 do not set the language if it was already deduced by start_subfile. */
3222 && !(cu->language == language_c && symtab->language != language_c))
3224 symtab->language = cu->language;
3226 pst->symtab = symtab;
3229 do_cleanups (back_to);
3232 /* Process a die and its children. */
3235 process_die (struct die_info *die, struct dwarf2_cu *cu)
3239 case DW_TAG_padding:
3241 case DW_TAG_compile_unit:
3242 read_file_scope (die, cu);
3244 case DW_TAG_type_unit:
3245 read_type_unit_scope (die, cu);
3247 case DW_TAG_subprogram:
3248 case DW_TAG_inlined_subroutine:
3249 read_func_scope (die, cu);
3251 case DW_TAG_lexical_block:
3252 case DW_TAG_try_block:
3253 case DW_TAG_catch_block:
3254 read_lexical_block_scope (die, cu);
3256 case DW_TAG_class_type:
3257 case DW_TAG_interface_type:
3258 case DW_TAG_structure_type:
3259 case DW_TAG_union_type:
3260 process_structure_scope (die, cu);
3262 case DW_TAG_enumeration_type:
3263 process_enumeration_scope (die, cu);
3266 /* These dies have a type, but processing them does not create
3267 a symbol or recurse to process the children. Therefore we can
3268 read them on-demand through read_type_die. */
3269 case DW_TAG_subroutine_type:
3270 case DW_TAG_set_type:
3271 case DW_TAG_array_type:
3272 case DW_TAG_pointer_type:
3273 case DW_TAG_ptr_to_member_type:
3274 case DW_TAG_reference_type:
3275 case DW_TAG_string_type:
3278 case DW_TAG_base_type:
3279 case DW_TAG_subrange_type:
3280 case DW_TAG_typedef:
3281 /* Add a typedef symbol for the type definition, if it has a
3283 new_symbol (die, read_type_die (die, cu), cu);
3285 case DW_TAG_common_block:
3286 read_common_block (die, cu);
3288 case DW_TAG_common_inclusion:
3290 case DW_TAG_namespace:
3291 processing_has_namespace_info = 1;
3292 read_namespace (die, cu);
3295 read_module (die, cu);
3297 case DW_TAG_imported_declaration:
3298 case DW_TAG_imported_module:
3299 processing_has_namespace_info = 1;
3300 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
3301 || cu->language != language_fortran))
3302 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
3303 dwarf_tag_name (die->tag));
3304 read_import_statement (die, cu);
3307 new_symbol (die, NULL, cu);
3312 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3313 If scope qualifiers are appropriate they will be added. The result
3314 will be allocated on the objfile_obstack, or NULL if the DIE does
3318 dwarf2_full_name (struct die_info *die, struct dwarf2_cu *cu)
3320 struct attribute *attr;
3321 char *prefix, *name;
3322 struct ui_file *buf = NULL;
3324 name = dwarf2_name (die, cu);
3328 /* These are the only languages we know how to qualify names in. */
3329 if (cu->language != language_cplus
3330 && cu->language != language_java)
3333 /* If no prefix is necessary for this type of DIE, return the
3334 unqualified name. The other three tags listed could be handled
3335 in pdi_needs_namespace, but that requires broader changes. */
3336 if (!pdi_needs_namespace (die->tag)
3337 && die->tag != DW_TAG_subprogram
3338 && die->tag != DW_TAG_variable
3339 && die->tag != DW_TAG_member)
3342 prefix = determine_prefix (die, cu);
3343 if (*prefix != '\0')
3344 name = typename_concat (&cu->objfile->objfile_obstack, prefix,
3350 /* Read the import statement specified by the given die and record it. */
3353 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
3355 struct attribute *import_attr;
3356 struct die_info *imported_die;
3357 const char *imported_name;
3358 const char *imported_name_prefix;
3359 const char *import_prefix;
3360 char *canonical_name;
3362 import_attr = dwarf2_attr (die, DW_AT_import, cu);
3363 if (import_attr == NULL)
3365 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
3366 dwarf_tag_name (die->tag));
3370 imported_die = follow_die_ref (die, import_attr, &cu);
3371 imported_name = dwarf2_name (imported_die, cu);
3372 if (imported_name == NULL)
3374 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3376 The import in the following code:
3390 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3391 <52> DW_AT_decl_file : 1
3392 <53> DW_AT_decl_line : 6
3393 <54> DW_AT_import : <0x75>
3394 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3396 <5b> DW_AT_decl_file : 1
3397 <5c> DW_AT_decl_line : 2
3398 <5d> DW_AT_type : <0x6e>
3400 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3401 <76> DW_AT_byte_size : 4
3402 <77> DW_AT_encoding : 5 (signed)
3404 imports the wrong die ( 0x75 instead of 0x58 ).
3405 This case will be ignored until the gcc bug is fixed. */
3409 /* FIXME: dwarf2_name (die); for the local name after import. */
3411 /* Figure out where the statement is being imported to. */
3412 import_prefix = determine_prefix (die, cu);
3414 /* Figure out what the scope of the imported die is and prepend it
3415 to the name of the imported die. */
3416 imported_name_prefix = determine_prefix (imported_die, cu);
3418 if (strlen (imported_name_prefix) > 0)
3420 canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1);
3421 strcpy (canonical_name, imported_name_prefix);
3422 strcat (canonical_name, "::");
3423 strcat (canonical_name, imported_name);
3427 canonical_name = alloca (strlen (imported_name) + 1);
3428 strcpy (canonical_name, imported_name);
3431 using_directives = cp_add_using (import_prefix,canonical_name, using_directives);
3435 initialize_cu_func_list (struct dwarf2_cu *cu)
3437 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
3441 free_cu_line_header (void *arg)
3443 struct dwarf2_cu *cu = arg;
3445 free_line_header (cu->line_header);
3446 cu->line_header = NULL;
3450 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
3452 struct objfile *objfile = cu->objfile;
3453 struct comp_unit_head *cu_header = &cu->header;
3454 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3455 CORE_ADDR lowpc = ((CORE_ADDR) -1);
3456 CORE_ADDR highpc = ((CORE_ADDR) 0);
3457 struct attribute *attr;
3459 char *comp_dir = NULL;
3460 struct die_info *child_die;
3461 bfd *abfd = objfile->obfd;
3462 struct line_header *line_header = 0;
3465 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3467 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
3469 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3470 from finish_block. */
3471 if (lowpc == ((CORE_ADDR) -1))
3476 /* Find the filename. Do not use dwarf2_name here, since the filename
3477 is not a source language identifier. */
3478 attr = dwarf2_attr (die, DW_AT_name, cu);
3481 name = DW_STRING (attr);
3484 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3486 comp_dir = DW_STRING (attr);
3487 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3489 comp_dir = ldirname (name);
3490 if (comp_dir != NULL)
3491 make_cleanup (xfree, comp_dir);
3493 if (comp_dir != NULL)
3495 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3496 directory, get rid of it. */
3497 char *cp = strchr (comp_dir, ':');
3499 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
3506 attr = dwarf2_attr (die, DW_AT_language, cu);
3509 set_cu_language (DW_UNSND (attr), cu);
3512 attr = dwarf2_attr (die, DW_AT_producer, cu);
3514 cu->producer = DW_STRING (attr);
3516 /* We assume that we're processing GCC output. */
3517 processing_gcc_compilation = 2;
3519 processing_has_namespace_info = 0;
3521 start_symtab (name, comp_dir, lowpc);
3522 record_debugformat ("DWARF 2");
3523 record_producer (cu->producer);
3525 initialize_cu_func_list (cu);
3527 /* Decode line number information if present. We do this before
3528 processing child DIEs, so that the line header table is available
3529 for DW_AT_decl_file. */
3530 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
3533 unsigned int line_offset = DW_UNSND (attr);
3534 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
3537 cu->line_header = line_header;
3538 make_cleanup (free_cu_line_header, cu);
3539 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
3543 /* Process all dies in compilation unit. */
3544 if (die->child != NULL)
3546 child_die = die->child;
3547 while (child_die && child_die->tag)
3549 process_die (child_die, cu);
3550 child_die = sibling_die (child_die);
3554 /* Decode macro information, if present. Dwarf 2 macro information
3555 refers to information in the line number info statement program
3556 header, so we can only read it if we've read the header
3558 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
3559 if (attr && line_header)
3561 unsigned int macro_offset = DW_UNSND (attr);
3562 dwarf_decode_macros (line_header, macro_offset,
3563 comp_dir, abfd, cu);
3565 do_cleanups (back_to);
3568 /* For TUs we want to skip the first top level sibling if it's not the
3569 actual type being defined by this TU. In this case the first top
3570 level sibling is there to provide context only. */
3573 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
3575 struct objfile *objfile = cu->objfile;
3576 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3578 struct attribute *attr;
3580 char *comp_dir = NULL;
3581 struct die_info *child_die;
3582 bfd *abfd = objfile->obfd;
3583 struct line_header *line_header = 0;
3585 /* start_symtab needs a low pc, but we don't really have one.
3586 Do what read_file_scope would do in the absence of such info. */
3587 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3589 /* Find the filename. Do not use dwarf2_name here, since the filename
3590 is not a source language identifier. */
3591 attr = dwarf2_attr (die, DW_AT_name, cu);
3593 name = DW_STRING (attr);
3595 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3597 comp_dir = DW_STRING (attr);
3598 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3600 comp_dir = ldirname (name);
3601 if (comp_dir != NULL)
3602 make_cleanup (xfree, comp_dir);
3608 attr = dwarf2_attr (die, DW_AT_language, cu);
3610 set_cu_language (DW_UNSND (attr), cu);
3612 /* This isn't technically needed today. It is done for symmetry
3613 with read_file_scope. */
3614 attr = dwarf2_attr (die, DW_AT_producer, cu);
3616 cu->producer = DW_STRING (attr);
3618 /* We assume that we're processing GCC output. */
3619 processing_gcc_compilation = 2;
3621 processing_has_namespace_info = 0;
3623 start_symtab (name, comp_dir, lowpc);
3624 record_debugformat ("DWARF 2");
3625 record_producer (cu->producer);
3627 /* Process the dies in the type unit. */
3628 if (die->child == NULL)
3630 dump_die_for_error (die);
3631 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3632 bfd_get_filename (abfd));
3635 child_die = die->child;
3637 while (child_die && child_die->tag)
3639 process_die (child_die, cu);
3641 child_die = sibling_die (child_die);
3644 do_cleanups (back_to);
3648 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
3649 struct dwarf2_cu *cu)
3651 struct function_range *thisfn;
3653 thisfn = (struct function_range *)
3654 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
3655 thisfn->name = name;
3656 thisfn->lowpc = lowpc;
3657 thisfn->highpc = highpc;
3658 thisfn->seen_line = 0;
3659 thisfn->next = NULL;
3661 if (cu->last_fn == NULL)
3662 cu->first_fn = thisfn;
3664 cu->last_fn->next = thisfn;
3666 cu->last_fn = thisfn;
3669 /* qsort helper for inherit_abstract_dies. */
3672 unsigned_int_compar (const void *ap, const void *bp)
3674 unsigned int a = *(unsigned int *) ap;
3675 unsigned int b = *(unsigned int *) bp;
3677 return (a > b) - (b > a);
3680 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3681 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3682 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3685 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
3687 struct die_info *child_die;
3688 unsigned die_children_count;
3689 /* CU offsets which were referenced by children of the current DIE. */
3691 unsigned *offsets_end, *offsetp;
3692 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3693 struct die_info *origin_die;
3694 /* Iterator of the ORIGIN_DIE children. */
3695 struct die_info *origin_child_die;
3696 struct cleanup *cleanups;
3697 struct attribute *attr;
3699 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
3703 origin_die = follow_die_ref (die, attr, &cu);
3704 if (die->tag != origin_die->tag
3705 && !(die->tag == DW_TAG_inlined_subroutine
3706 && origin_die->tag == DW_TAG_subprogram))
3707 complaint (&symfile_complaints,
3708 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3709 die->offset, origin_die->offset);
3711 child_die = die->child;
3712 die_children_count = 0;
3713 while (child_die && child_die->tag)
3715 child_die = sibling_die (child_die);
3716 die_children_count++;
3718 offsets = xmalloc (sizeof (*offsets) * die_children_count);
3719 cleanups = make_cleanup (xfree, offsets);
3721 offsets_end = offsets;
3722 child_die = die->child;
3723 while (child_die && child_die->tag)
3725 /* For each CHILD_DIE, find the corresponding child of
3726 ORIGIN_DIE. If there is more than one layer of
3727 DW_AT_abstract_origin, follow them all; there shouldn't be,
3728 but GCC versions at least through 4.4 generate this (GCC PR
3730 struct die_info *child_origin_die = child_die;
3733 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
3736 child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
3739 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3740 counterpart may exist. */
3741 if (child_origin_die != child_die)
3743 if (child_die->tag != child_origin_die->tag
3744 && !(child_die->tag == DW_TAG_inlined_subroutine
3745 && child_origin_die->tag == DW_TAG_subprogram))
3746 complaint (&symfile_complaints,
3747 _("Child DIE 0x%x and its abstract origin 0x%x have "
3748 "different tags"), child_die->offset,
3749 child_origin_die->offset);
3750 if (child_origin_die->parent != origin_die)
3751 complaint (&symfile_complaints,
3752 _("Child DIE 0x%x and its abstract origin 0x%x have "
3753 "different parents"), child_die->offset,
3754 child_origin_die->offset);
3756 *offsets_end++ = child_origin_die->offset;
3758 child_die = sibling_die (child_die);
3760 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
3761 unsigned_int_compar);
3762 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
3763 if (offsetp[-1] == *offsetp)
3764 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
3765 "to DIE 0x%x as their abstract origin"),
3766 die->offset, *offsetp);
3769 origin_child_die = origin_die->child;
3770 while (origin_child_die && origin_child_die->tag)
3772 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3773 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
3775 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
3777 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3778 process_die (origin_child_die, cu);
3780 origin_child_die = sibling_die (origin_child_die);
3783 do_cleanups (cleanups);
3787 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
3789 struct objfile *objfile = cu->objfile;
3790 struct context_stack *new;
3793 struct die_info *child_die;
3794 struct attribute *attr, *call_line, *call_file;
3797 struct block *block;
3798 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
3802 /* If we do not have call site information, we can't show the
3803 caller of this inlined function. That's too confusing, so
3804 only use the scope for local variables. */
3805 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
3806 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
3807 if (call_line == NULL || call_file == NULL)
3809 read_lexical_block_scope (die, cu);
3814 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3816 name = dwarf2_linkage_name (die, cu);
3818 /* Ignore functions with missing or empty names and functions with
3819 missing or invalid low and high pc attributes. */
3820 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
3826 /* Record the function range for dwarf_decode_lines. */
3827 add_to_cu_func_list (name, lowpc, highpc, cu);
3829 new = push_context (0, lowpc);
3830 new->name = new_symbol (die, read_type_die (die, cu), cu);
3832 /* If there is a location expression for DW_AT_frame_base, record
3834 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
3836 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3837 expression is being recorded directly in the function's symbol
3838 and not in a separate frame-base object. I guess this hack is
3839 to avoid adding some sort of frame-base adjunct/annex to the
3840 function's symbol :-(. The problem with doing this is that it
3841 results in a function symbol with a location expression that
3842 has nothing to do with the location of the function, ouch! The
3843 relationship should be: a function's symbol has-a frame base; a
3844 frame-base has-a location expression. */
3845 dwarf2_symbol_mark_computed (attr, new->name, cu);
3847 cu->list_in_scope = &local_symbols;
3849 if (die->child != NULL)
3851 child_die = die->child;
3852 while (child_die && child_die->tag)
3854 process_die (child_die, cu);
3855 child_die = sibling_die (child_die);
3859 inherit_abstract_dies (die, cu);
3861 new = pop_context ();
3862 /* Make a block for the local symbols within. */
3863 block = finish_block (new->name, &local_symbols, new->old_blocks,
3864 lowpc, highpc, objfile);
3866 /* For C++, set the block's scope. */
3867 if (cu->language == language_cplus)
3868 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
3869 determine_prefix (die, cu),
3870 processing_has_namespace_info);
3872 /* If we have address ranges, record them. */
3873 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3875 /* In C++, we can have functions nested inside functions (e.g., when
3876 a function declares a class that has methods). This means that
3877 when we finish processing a function scope, we may need to go
3878 back to building a containing block's symbol lists. */
3879 local_symbols = new->locals;
3880 param_symbols = new->params;
3881 using_directives = new->using_directives;
3883 /* If we've finished processing a top-level function, subsequent
3884 symbols go in the file symbol list. */
3885 if (outermost_context_p ())
3886 cu->list_in_scope = &file_symbols;
3889 /* Process all the DIES contained within a lexical block scope. Start
3890 a new scope, process the dies, and then close the scope. */
3893 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
3895 struct objfile *objfile = cu->objfile;
3896 struct context_stack *new;
3897 CORE_ADDR lowpc, highpc;
3898 struct die_info *child_die;
3901 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3903 /* Ignore blocks with missing or invalid low and high pc attributes. */
3904 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3905 as multiple lexical blocks? Handling children in a sane way would
3906 be nasty. Might be easier to properly extend generic blocks to
3908 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu))
3913 push_context (0, lowpc);
3914 if (die->child != NULL)
3916 child_die = die->child;
3917 while (child_die && child_die->tag)
3919 process_die (child_die, cu);
3920 child_die = sibling_die (child_die);
3923 new = pop_context ();
3925 if (local_symbols != NULL)
3928 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
3931 /* Note that recording ranges after traversing children, as we
3932 do here, means that recording a parent's ranges entails
3933 walking across all its children's ranges as they appear in
3934 the address map, which is quadratic behavior.
3936 It would be nicer to record the parent's ranges before
3937 traversing its children, simply overriding whatever you find
3938 there. But since we don't even decide whether to create a
3939 block until after we've traversed its children, that's hard
3941 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3943 local_symbols = new->locals;
3944 using_directives = new->using_directives;
3947 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3948 Return 1 if the attributes are present and valid, otherwise, return 0.
3949 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3952 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
3953 CORE_ADDR *high_return, struct dwarf2_cu *cu,
3954 struct partial_symtab *ranges_pst)
3956 struct objfile *objfile = cu->objfile;
3957 struct comp_unit_head *cu_header = &cu->header;
3958 bfd *obfd = objfile->obfd;
3959 unsigned int addr_size = cu_header->addr_size;
3960 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3961 /* Base address selection entry. */
3972 found_base = cu->base_known;
3973 base = cu->base_address;
3975 if (offset >= dwarf2_per_objfile->ranges.size)
3977 complaint (&symfile_complaints,
3978 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3982 buffer = dwarf2_per_objfile->ranges.buffer + offset;
3984 /* Read in the largest possible address. */
3985 marker = read_address (obfd, buffer, cu, &dummy);
3986 if ((marker & mask) == mask)
3988 /* If we found the largest possible address, then
3989 read the base address. */
3990 base = read_address (obfd, buffer + addr_size, cu, &dummy);
3991 buffer += 2 * addr_size;
3992 offset += 2 * addr_size;
3998 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4002 CORE_ADDR range_beginning, range_end;
4004 range_beginning = read_address (obfd, buffer, cu, &dummy);
4005 buffer += addr_size;
4006 range_end = read_address (obfd, buffer, cu, &dummy);
4007 buffer += addr_size;
4008 offset += 2 * addr_size;
4010 /* An end of list marker is a pair of zero addresses. */
4011 if (range_beginning == 0 && range_end == 0)
4012 /* Found the end of list entry. */
4015 /* Each base address selection entry is a pair of 2 values.
4016 The first is the largest possible address, the second is
4017 the base address. Check for a base address here. */
4018 if ((range_beginning & mask) == mask)
4020 /* If we found the largest possible address, then
4021 read the base address. */
4022 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4029 /* We have no valid base address for the ranges
4031 complaint (&symfile_complaints,
4032 _("Invalid .debug_ranges data (no base address)"));
4036 range_beginning += base;
4039 if (ranges_pst != NULL && range_beginning < range_end)
4040 addrmap_set_empty (objfile->psymtabs_addrmap,
4041 range_beginning + baseaddr, range_end - 1 + baseaddr,
4044 /* FIXME: This is recording everything as a low-high
4045 segment of consecutive addresses. We should have a
4046 data structure for discontiguous block ranges
4050 low = range_beginning;
4056 if (range_beginning < low)
4057 low = range_beginning;
4058 if (range_end > high)
4064 /* If the first entry is an end-of-list marker, the range
4065 describes an empty scope, i.e. no instructions. */
4071 *high_return = high;
4075 /* Get low and high pc attributes from a die. Return 1 if the attributes
4076 are present and valid, otherwise, return 0. Return -1 if the range is
4077 discontinuous, i.e. derived from DW_AT_ranges information. */
4079 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
4080 CORE_ADDR *highpc, struct dwarf2_cu *cu)
4082 struct attribute *attr;
4087 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4090 high = DW_ADDR (attr);
4091 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4093 low = DW_ADDR (attr);
4095 /* Found high w/o low attribute. */
4098 /* Found consecutive range of addresses. */
4103 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4106 /* Value of the DW_AT_ranges attribute is the offset in the
4107 .debug_ranges section. */
4108 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, NULL))
4110 /* Found discontinuous range of addresses. */
4118 /* When using the GNU linker, .gnu.linkonce. sections are used to
4119 eliminate duplicate copies of functions and vtables and such.
4120 The linker will arbitrarily choose one and discard the others.
4121 The AT_*_pc values for such functions refer to local labels in
4122 these sections. If the section from that file was discarded, the
4123 labels are not in the output, so the relocs get a value of 0.
4124 If this is a discarded function, mark the pc bounds as invalid,
4125 so that GDB will ignore it. */
4126 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
4134 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4135 its low and high PC addresses. Do nothing if these addresses could not
4136 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4137 and HIGHPC to the high address if greater than HIGHPC. */
4140 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
4141 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4142 struct dwarf2_cu *cu)
4144 CORE_ADDR low, high;
4145 struct die_info *child = die->child;
4147 if (dwarf2_get_pc_bounds (die, &low, &high, cu))
4149 *lowpc = min (*lowpc, low);
4150 *highpc = max (*highpc, high);
4153 /* If the language does not allow nested subprograms (either inside
4154 subprograms or lexical blocks), we're done. */
4155 if (cu->language != language_ada)
4158 /* Check all the children of the given DIE. If it contains nested
4159 subprograms, then check their pc bounds. Likewise, we need to
4160 check lexical blocks as well, as they may also contain subprogram
4162 while (child && child->tag)
4164 if (child->tag == DW_TAG_subprogram
4165 || child->tag == DW_TAG_lexical_block)
4166 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
4167 child = sibling_die (child);
4171 /* Get the low and high pc's represented by the scope DIE, and store
4172 them in *LOWPC and *HIGHPC. If the correct values can't be
4173 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4176 get_scope_pc_bounds (struct die_info *die,
4177 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4178 struct dwarf2_cu *cu)
4180 CORE_ADDR best_low = (CORE_ADDR) -1;
4181 CORE_ADDR best_high = (CORE_ADDR) 0;
4182 CORE_ADDR current_low, current_high;
4184 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu))
4186 best_low = current_low;
4187 best_high = current_high;
4191 struct die_info *child = die->child;
4193 while (child && child->tag)
4195 switch (child->tag) {
4196 case DW_TAG_subprogram:
4197 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
4199 case DW_TAG_namespace:
4200 /* FIXME: carlton/2004-01-16: Should we do this for
4201 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4202 that current GCC's always emit the DIEs corresponding
4203 to definitions of methods of classes as children of a
4204 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4205 the DIEs giving the declarations, which could be
4206 anywhere). But I don't see any reason why the
4207 standards says that they have to be there. */
4208 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
4210 if (current_low != ((CORE_ADDR) -1))
4212 best_low = min (best_low, current_low);
4213 best_high = max (best_high, current_high);
4221 child = sibling_die (child);
4226 *highpc = best_high;
4229 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4232 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
4233 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
4235 struct attribute *attr;
4237 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4240 CORE_ADDR high = DW_ADDR (attr);
4241 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4244 CORE_ADDR low = DW_ADDR (attr);
4245 record_block_range (block, baseaddr + low, baseaddr + high - 1);
4249 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4252 bfd *obfd = cu->objfile->obfd;
4254 /* The value of the DW_AT_ranges attribute is the offset of the
4255 address range list in the .debug_ranges section. */
4256 unsigned long offset = DW_UNSND (attr);
4257 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
4259 /* For some target architectures, but not others, the
4260 read_address function sign-extends the addresses it returns.
4261 To recognize base address selection entries, we need a
4263 unsigned int addr_size = cu->header.addr_size;
4264 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4266 /* The base address, to which the next pair is relative. Note
4267 that this 'base' is a DWARF concept: most entries in a range
4268 list are relative, to reduce the number of relocs against the
4269 debugging information. This is separate from this function's
4270 'baseaddr' argument, which GDB uses to relocate debugging
4271 information from a shared library based on the address at
4272 which the library was loaded. */
4273 CORE_ADDR base = cu->base_address;
4274 int base_known = cu->base_known;
4276 if (offset >= dwarf2_per_objfile->ranges.size)
4278 complaint (&symfile_complaints,
4279 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4286 unsigned int bytes_read;
4287 CORE_ADDR start, end;
4289 start = read_address (obfd, buffer, cu, &bytes_read);
4290 buffer += bytes_read;
4291 end = read_address (obfd, buffer, cu, &bytes_read);
4292 buffer += bytes_read;
4294 /* Did we find the end of the range list? */
4295 if (start == 0 && end == 0)
4298 /* Did we find a base address selection entry? */
4299 else if ((start & base_select_mask) == base_select_mask)
4305 /* We found an ordinary address range. */
4310 complaint (&symfile_complaints,
4311 _("Invalid .debug_ranges data (no base address)"));
4315 record_block_range (block,
4316 baseaddr + base + start,
4317 baseaddr + base + end - 1);
4323 /* Add an aggregate field to the field list. */
4326 dwarf2_add_field (struct field_info *fip, struct die_info *die,
4327 struct dwarf2_cu *cu)
4329 struct objfile *objfile = cu->objfile;
4330 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4331 struct nextfield *new_field;
4332 struct attribute *attr;
4334 char *fieldname = "";
4336 /* Allocate a new field list entry and link it in. */
4337 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4338 make_cleanup (xfree, new_field);
4339 memset (new_field, 0, sizeof (struct nextfield));
4340 new_field->next = fip->fields;
4341 fip->fields = new_field;
4344 /* Handle accessibility and virtuality of field.
4345 The default accessibility for members is public, the default
4346 accessibility for inheritance is private. */
4347 if (die->tag != DW_TAG_inheritance)
4348 new_field->accessibility = DW_ACCESS_public;
4350 new_field->accessibility = DW_ACCESS_private;
4351 new_field->virtuality = DW_VIRTUALITY_none;
4353 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4355 new_field->accessibility = DW_UNSND (attr);
4356 if (new_field->accessibility != DW_ACCESS_public)
4357 fip->non_public_fields = 1;
4358 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4360 new_field->virtuality = DW_UNSND (attr);
4362 fp = &new_field->field;
4364 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
4366 /* Data member other than a C++ static data member. */
4368 /* Get type of field. */
4369 fp->type = die_type (die, cu);
4371 SET_FIELD_BITPOS (*fp, 0);
4373 /* Get bit size of field (zero if none). */
4374 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
4377 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
4381 FIELD_BITSIZE (*fp) = 0;
4384 /* Get bit offset of field. */
4385 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4390 if (attr_form_is_section_offset (attr))
4392 dwarf2_complex_location_expr_complaint ();
4395 else if (attr_form_is_constant (attr))
4396 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4398 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4400 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4402 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
4405 if (gdbarch_bits_big_endian (gdbarch))
4407 /* For big endian bits, the DW_AT_bit_offset gives the
4408 additional bit offset from the MSB of the containing
4409 anonymous object to the MSB of the field. We don't
4410 have to do anything special since we don't need to
4411 know the size of the anonymous object. */
4412 FIELD_BITPOS (*fp) += DW_UNSND (attr);
4416 /* For little endian bits, compute the bit offset to the
4417 MSB of the anonymous object, subtract off the number of
4418 bits from the MSB of the field to the MSB of the
4419 object, and then subtract off the number of bits of
4420 the field itself. The result is the bit offset of
4421 the LSB of the field. */
4423 int bit_offset = DW_UNSND (attr);
4425 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4428 /* The size of the anonymous object containing
4429 the bit field is explicit, so use the
4430 indicated size (in bytes). */
4431 anonymous_size = DW_UNSND (attr);
4435 /* The size of the anonymous object containing
4436 the bit field must be inferred from the type
4437 attribute of the data member containing the
4439 anonymous_size = TYPE_LENGTH (fp->type);
4441 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
4442 - bit_offset - FIELD_BITSIZE (*fp);
4446 /* Get name of field. */
4447 fieldname = dwarf2_name (die, cu);
4448 if (fieldname == NULL)
4451 /* The name is already allocated along with this objfile, so we don't
4452 need to duplicate it for the type. */
4453 fp->name = fieldname;
4455 /* Change accessibility for artificial fields (e.g. virtual table
4456 pointer or virtual base class pointer) to private. */
4457 if (dwarf2_attr (die, DW_AT_artificial, cu))
4459 new_field->accessibility = DW_ACCESS_private;
4460 fip->non_public_fields = 1;
4463 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
4465 /* C++ static member. */
4467 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4468 is a declaration, but all versions of G++ as of this writing
4469 (so through at least 3.2.1) incorrectly generate
4470 DW_TAG_variable tags. */
4474 /* Get name of field. */
4475 fieldname = dwarf2_name (die, cu);
4476 if (fieldname == NULL)
4479 /* Get physical name. */
4480 physname = dwarf2_linkage_name (die, cu);
4482 /* The name is already allocated along with this objfile, so we don't
4483 need to duplicate it for the type. */
4484 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
4485 FIELD_TYPE (*fp) = die_type (die, cu);
4486 FIELD_NAME (*fp) = fieldname;
4488 else if (die->tag == DW_TAG_inheritance)
4490 /* C++ base class field. */
4491 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4493 SET_FIELD_BITPOS (*fp, decode_locdesc (DW_BLOCK (attr), cu)
4495 FIELD_BITSIZE (*fp) = 0;
4496 FIELD_TYPE (*fp) = die_type (die, cu);
4497 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
4498 fip->nbaseclasses++;
4502 /* Create the vector of fields, and attach it to the type. */
4505 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
4506 struct dwarf2_cu *cu)
4508 int nfields = fip->nfields;
4510 /* Record the field count, allocate space for the array of fields,
4511 and create blank accessibility bitfields if necessary. */
4512 TYPE_NFIELDS (type) = nfields;
4513 TYPE_FIELDS (type) = (struct field *)
4514 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4515 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4517 if (fip->non_public_fields)
4519 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4521 TYPE_FIELD_PRIVATE_BITS (type) =
4522 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4523 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4525 TYPE_FIELD_PROTECTED_BITS (type) =
4526 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4527 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4529 TYPE_FIELD_IGNORE_BITS (type) =
4530 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4531 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4534 /* If the type has baseclasses, allocate and clear a bit vector for
4535 TYPE_FIELD_VIRTUAL_BITS. */
4536 if (fip->nbaseclasses)
4538 int num_bytes = B_BYTES (fip->nbaseclasses);
4539 unsigned char *pointer;
4541 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4542 pointer = TYPE_ALLOC (type, num_bytes);
4543 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
4544 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
4545 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
4548 /* Copy the saved-up fields into the field vector. Start from the head
4549 of the list, adding to the tail of the field array, so that they end
4550 up in the same order in the array in which they were added to the list. */
4551 while (nfields-- > 0)
4553 TYPE_FIELD (type, nfields) = fip->fields->field;
4554 switch (fip->fields->accessibility)
4556 case DW_ACCESS_private:
4557 SET_TYPE_FIELD_PRIVATE (type, nfields);
4560 case DW_ACCESS_protected:
4561 SET_TYPE_FIELD_PROTECTED (type, nfields);
4564 case DW_ACCESS_public:
4568 /* Unknown accessibility. Complain and treat it as public. */
4570 complaint (&symfile_complaints, _("unsupported accessibility %d"),
4571 fip->fields->accessibility);
4575 if (nfields < fip->nbaseclasses)
4577 switch (fip->fields->virtuality)
4579 case DW_VIRTUALITY_virtual:
4580 case DW_VIRTUALITY_pure_virtual:
4581 SET_TYPE_FIELD_VIRTUAL (type, nfields);
4585 fip->fields = fip->fields->next;
4589 /* Add a member function to the proper fieldlist. */
4592 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
4593 struct type *type, struct dwarf2_cu *cu)
4595 struct objfile *objfile = cu->objfile;
4596 struct attribute *attr;
4597 struct fnfieldlist *flp;
4599 struct fn_field *fnp;
4602 struct nextfnfield *new_fnfield;
4603 struct type *this_type;
4605 /* Get name of member function. */
4606 fieldname = dwarf2_name (die, cu);
4607 if (fieldname == NULL)
4610 /* Get the mangled name. */
4611 physname = dwarf2_linkage_name (die, cu);
4613 /* Look up member function name in fieldlist. */
4614 for (i = 0; i < fip->nfnfields; i++)
4616 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
4620 /* Create new list element if necessary. */
4621 if (i < fip->nfnfields)
4622 flp = &fip->fnfieldlists[i];
4625 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
4627 fip->fnfieldlists = (struct fnfieldlist *)
4628 xrealloc (fip->fnfieldlists,
4629 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
4630 * sizeof (struct fnfieldlist));
4631 if (fip->nfnfields == 0)
4632 make_cleanup (free_current_contents, &fip->fnfieldlists);
4634 flp = &fip->fnfieldlists[fip->nfnfields];
4635 flp->name = fieldname;
4641 /* Create a new member function field and chain it to the field list
4643 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
4644 make_cleanup (xfree, new_fnfield);
4645 memset (new_fnfield, 0, sizeof (struct nextfnfield));
4646 new_fnfield->next = flp->head;
4647 flp->head = new_fnfield;
4650 /* Fill in the member function field info. */
4651 fnp = &new_fnfield->fnfield;
4652 /* The name is already allocated along with this objfile, so we don't
4653 need to duplicate it for the type. */
4654 fnp->physname = physname ? physname : "";
4655 fnp->type = alloc_type (objfile);
4656 this_type = read_type_die (die, cu);
4657 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
4659 int nparams = TYPE_NFIELDS (this_type);
4661 /* TYPE is the domain of this method, and THIS_TYPE is the type
4662 of the method itself (TYPE_CODE_METHOD). */
4663 smash_to_method_type (fnp->type, type,
4664 TYPE_TARGET_TYPE (this_type),
4665 TYPE_FIELDS (this_type),
4666 TYPE_NFIELDS (this_type),
4667 TYPE_VARARGS (this_type));
4669 /* Handle static member functions.
4670 Dwarf2 has no clean way to discern C++ static and non-static
4671 member functions. G++ helps GDB by marking the first
4672 parameter for non-static member functions (which is the
4673 this pointer) as artificial. We obtain this information
4674 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4675 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
4676 fnp->voffset = VOFFSET_STATIC;
4679 complaint (&symfile_complaints, _("member function type missing for '%s'"),
4682 /* Get fcontext from DW_AT_containing_type if present. */
4683 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4684 fnp->fcontext = die_containing_type (die, cu);
4686 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4687 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4689 /* Get accessibility. */
4690 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4693 switch (DW_UNSND (attr))
4695 case DW_ACCESS_private:
4696 fnp->is_private = 1;
4698 case DW_ACCESS_protected:
4699 fnp->is_protected = 1;
4704 /* Check for artificial methods. */
4705 attr = dwarf2_attr (die, DW_AT_artificial, cu);
4706 if (attr && DW_UNSND (attr) != 0)
4707 fnp->is_artificial = 1;
4709 /* Get index in virtual function table if it is a virtual member function. */
4710 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
4713 /* Support the .debug_loc offsets */
4714 if (attr_form_is_block (attr))
4716 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
4718 else if (attr_form_is_section_offset (attr))
4720 dwarf2_complex_location_expr_complaint ();
4724 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4730 /* Create the vector of member function fields, and attach it to the type. */
4733 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
4734 struct dwarf2_cu *cu)
4736 struct fnfieldlist *flp;
4737 int total_length = 0;
4740 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4741 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
4742 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
4744 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
4746 struct nextfnfield *nfp = flp->head;
4747 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
4750 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
4751 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
4752 fn_flp->fn_fields = (struct fn_field *)
4753 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
4754 for (k = flp->length; (k--, nfp); nfp = nfp->next)
4755 fn_flp->fn_fields[k] = nfp->fnfield;
4757 total_length += flp->length;
4760 TYPE_NFN_FIELDS (type) = fip->nfnfields;
4761 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
4764 /* Returns non-zero if NAME is the name of a vtable member in CU's
4765 language, zero otherwise. */
4767 is_vtable_name (const char *name, struct dwarf2_cu *cu)
4769 static const char vptr[] = "_vptr";
4770 static const char vtable[] = "vtable";
4772 /* Look for the C++ and Java forms of the vtable. */
4773 if ((cu->language == language_java
4774 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
4775 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
4776 && is_cplus_marker (name[sizeof (vptr) - 1])))
4782 /* GCC outputs unnamed structures that are really pointers to member
4783 functions, with the ABI-specified layout. If DIE (from CU) describes
4784 such a structure, set its type, and return nonzero. Otherwise return
4787 GCC shouldn't do this; it should just output pointer to member DIEs.
4788 This is GCC PR debug/28767. */
4790 static struct type *
4791 quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
4793 struct objfile *objfile = cu->objfile;
4795 struct die_info *pfn_die, *delta_die;
4796 struct attribute *pfn_name, *delta_name;
4797 struct type *pfn_type, *domain_type;
4799 /* Check for a structure with no name and two children. */
4800 if (die->tag != DW_TAG_structure_type
4801 || dwarf2_attr (die, DW_AT_name, cu) != NULL
4802 || die->child == NULL
4803 || die->child->sibling == NULL
4804 || (die->child->sibling->sibling != NULL
4805 && die->child->sibling->sibling->tag != DW_TAG_padding))
4808 /* Check for __pfn and __delta members. */
4809 pfn_die = die->child;
4810 pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
4811 if (pfn_die->tag != DW_TAG_member
4813 || DW_STRING (pfn_name) == NULL
4814 || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
4817 delta_die = pfn_die->sibling;
4818 delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
4819 if (delta_die->tag != DW_TAG_member
4820 || delta_name == NULL
4821 || DW_STRING (delta_name) == NULL
4822 || strcmp ("__delta", DW_STRING (delta_name)) != 0)
4825 /* Find the type of the method. */
4826 pfn_type = die_type (pfn_die, cu);
4827 if (pfn_type == NULL
4828 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
4829 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
4832 /* Look for the "this" argument. */
4833 pfn_type = TYPE_TARGET_TYPE (pfn_type);
4834 if (TYPE_NFIELDS (pfn_type) == 0
4835 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
4838 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
4839 type = alloc_type (objfile);
4840 smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
4841 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
4842 TYPE_VARARGS (pfn_type));
4843 type = lookup_methodptr_type (type);
4844 return set_die_type (die, type, cu);
4847 /* Called when we find the DIE that starts a structure or union scope
4848 (definition) to process all dies that define the members of the
4851 NOTE: we need to call struct_type regardless of whether or not the
4852 DIE has an at_name attribute, since it might be an anonymous
4853 structure or union. This gets the type entered into our set of
4856 However, if the structure is incomplete (an opaque struct/union)
4857 then suppress creating a symbol table entry for it since gdb only
4858 wants to find the one with the complete definition. Note that if
4859 it is complete, we just call new_symbol, which does it's own
4860 checking about whether the struct/union is anonymous or not (and
4861 suppresses creating a symbol table entry itself). */
4863 static struct type *
4864 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
4866 struct objfile *objfile = cu->objfile;
4868 struct attribute *attr;
4870 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4872 type = quirk_gcc_member_function_pointer (die, cu);
4876 /* If the definition of this type lives in .debug_types, read that type.
4877 Don't follow DW_AT_specification though, that will take us back up
4878 the chain and we want to go down. */
4879 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
4882 struct dwarf2_cu *type_cu = cu;
4883 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
4884 /* We could just recurse on read_structure_type, but we need to call
4885 get_die_type to ensure only one type for this DIE is created.
4886 This is important, for example, because for c++ classes we need
4887 TYPE_NAME set which is only done by new_symbol. Blech. */
4888 type = read_type_die (type_die, type_cu);
4889 return set_die_type (die, type, cu);
4892 type = alloc_type (objfile);
4893 INIT_CPLUS_SPECIFIC (type);
4895 name = dwarf2_name (die, cu);
4898 if (cu->language == language_cplus
4899 || cu->language == language_java)
4901 const char *new_prefix = determine_class_name (die, cu);
4902 TYPE_TAG_NAME (type) = (char *) new_prefix;
4906 /* The name is already allocated along with this objfile, so
4907 we don't need to duplicate it for the type. */
4908 TYPE_TAG_NAME (type) = name;
4912 if (die->tag == DW_TAG_structure_type)
4914 TYPE_CODE (type) = TYPE_CODE_STRUCT;
4916 else if (die->tag == DW_TAG_union_type)
4918 TYPE_CODE (type) = TYPE_CODE_UNION;
4922 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4924 TYPE_CODE (type) = TYPE_CODE_CLASS;
4927 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4930 TYPE_LENGTH (type) = DW_UNSND (attr);
4934 TYPE_LENGTH (type) = 0;
4937 TYPE_STUB_SUPPORTED (type) = 1;
4938 if (die_is_declaration (die, cu))
4939 TYPE_STUB (type) = 1;
4941 /* We need to add the type field to the die immediately so we don't
4942 infinitely recurse when dealing with pointers to the structure
4943 type within the structure itself. */
4944 set_die_type (die, type, cu);
4946 if (die->child != NULL && ! die_is_declaration (die, cu))
4948 struct field_info fi;
4949 struct die_info *child_die;
4951 memset (&fi, 0, sizeof (struct field_info));
4953 child_die = die->child;
4955 while (child_die && child_die->tag)
4957 if (child_die->tag == DW_TAG_member
4958 || child_die->tag == DW_TAG_variable)
4960 /* NOTE: carlton/2002-11-05: A C++ static data member
4961 should be a DW_TAG_member that is a declaration, but
4962 all versions of G++ as of this writing (so through at
4963 least 3.2.1) incorrectly generate DW_TAG_variable
4964 tags for them instead. */
4965 dwarf2_add_field (&fi, child_die, cu);
4967 else if (child_die->tag == DW_TAG_subprogram)
4969 /* C++ member function. */
4970 dwarf2_add_member_fn (&fi, child_die, type, cu);
4972 else if (child_die->tag == DW_TAG_inheritance)
4974 /* C++ base class field. */
4975 dwarf2_add_field (&fi, child_die, cu);
4977 child_die = sibling_die (child_die);
4980 /* Attach fields and member functions to the type. */
4982 dwarf2_attach_fields_to_type (&fi, type, cu);
4985 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
4987 /* Get the type which refers to the base class (possibly this
4988 class itself) which contains the vtable pointer for the current
4989 class from the DW_AT_containing_type attribute. */
4991 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4993 struct type *t = die_containing_type (die, cu);
4995 TYPE_VPTR_BASETYPE (type) = t;
5000 /* Our own class provides vtbl ptr. */
5001 for (i = TYPE_NFIELDS (t) - 1;
5002 i >= TYPE_N_BASECLASSES (t);
5005 char *fieldname = TYPE_FIELD_NAME (t, i);
5007 if (is_vtable_name (fieldname, cu))
5009 TYPE_VPTR_FIELDNO (type) = i;
5014 /* Complain if virtual function table field not found. */
5015 if (i < TYPE_N_BASECLASSES (t))
5016 complaint (&symfile_complaints,
5017 _("virtual function table pointer not found when defining class '%s'"),
5018 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
5023 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
5026 else if (cu->producer
5027 && strncmp (cu->producer,
5028 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5030 /* The IBM XLC compiler does not provide direct indication
5031 of the containing type, but the vtable pointer is
5032 always named __vfp. */
5036 for (i = TYPE_NFIELDS (type) - 1;
5037 i >= TYPE_N_BASECLASSES (type);
5040 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
5042 TYPE_VPTR_FIELDNO (type) = i;
5043 TYPE_VPTR_BASETYPE (type) = type;
5051 do_cleanups (back_to);
5056 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
5058 struct objfile *objfile = cu->objfile;
5059 struct die_info *child_die = die->child;
5060 struct type *this_type;
5062 this_type = get_die_type (die, cu);
5063 if (this_type == NULL)
5064 this_type = read_structure_type (die, cu);
5066 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5067 snapshots) has been known to create a die giving a declaration
5068 for a class that has, as a child, a die giving a definition for a
5069 nested class. So we have to process our children even if the
5070 current die is a declaration. Normally, of course, a declaration
5071 won't have any children at all. */
5073 while (child_die != NULL && child_die->tag)
5075 if (child_die->tag == DW_TAG_member
5076 || child_die->tag == DW_TAG_variable
5077 || child_die->tag == DW_TAG_inheritance)
5082 process_die (child_die, cu);
5084 child_die = sibling_die (child_die);
5087 /* Do not consider external references. According to the DWARF standard,
5088 these DIEs are identified by the fact that they have no byte_size
5089 attribute, and a declaration attribute. */
5090 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
5091 || !die_is_declaration (die, cu))
5092 new_symbol (die, this_type, cu);
5095 /* Given a DW_AT_enumeration_type die, set its type. We do not
5096 complete the type's fields yet, or create any symbols. */
5098 static struct type *
5099 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
5101 struct objfile *objfile = cu->objfile;
5103 struct attribute *attr;
5106 /* If the definition of this type lives in .debug_types, read that type.
5107 Don't follow DW_AT_specification though, that will take us back up
5108 the chain and we want to go down. */
5109 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5112 struct dwarf2_cu *type_cu = cu;
5113 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5114 type = read_type_die (type_die, type_cu);
5115 return set_die_type (die, type, cu);
5118 type = alloc_type (objfile);
5120 TYPE_CODE (type) = TYPE_CODE_ENUM;
5121 name = dwarf2_full_name (die, cu);
5123 TYPE_TAG_NAME (type) = (char *) name;
5125 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5128 TYPE_LENGTH (type) = DW_UNSND (attr);
5132 TYPE_LENGTH (type) = 0;
5135 /* The enumeration DIE can be incomplete. In Ada, any type can be
5136 declared as private in the package spec, and then defined only
5137 inside the package body. Such types are known as Taft Amendment
5138 Types. When another package uses such a type, an incomplete DIE
5139 may be generated by the compiler. */
5140 if (die_is_declaration (die, cu))
5141 TYPE_STUB (type) = 1;
5143 return set_die_type (die, type, cu);
5146 /* Determine the name of the type represented by DIE, which should be
5147 a named C++ or Java compound type. Return the name in question,
5148 allocated on the objfile obstack. */
5151 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
5153 const char *new_prefix = NULL;
5155 /* If we don't have namespace debug info, guess the name by trying
5156 to demangle the names of members, just like we did in
5157 guess_structure_name. */
5158 if (!processing_has_namespace_info)
5160 struct die_info *child;
5162 for (child = die->child;
5163 child != NULL && child->tag != 0;
5164 child = sibling_die (child))
5166 if (child->tag == DW_TAG_subprogram)
5169 = language_class_name_from_physname (cu->language_defn,
5173 if (phys_prefix != NULL)
5176 = obsavestring (phys_prefix, strlen (phys_prefix),
5177 &cu->objfile->objfile_obstack);
5178 xfree (phys_prefix);
5185 if (new_prefix == NULL)
5186 new_prefix = dwarf2_full_name (die, cu);
5191 /* Given a pointer to a die which begins an enumeration, process all
5192 the dies that define the members of the enumeration, and create the
5193 symbol for the enumeration type.
5195 NOTE: We reverse the order of the element list. */
5198 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
5200 struct objfile *objfile = cu->objfile;
5201 struct die_info *child_die;
5202 struct field *fields;
5205 int unsigned_enum = 1;
5207 struct type *this_type;
5211 this_type = get_die_type (die, cu);
5212 if (this_type == NULL)
5213 this_type = read_enumeration_type (die, cu);
5214 if (die->child != NULL)
5216 child_die = die->child;
5217 while (child_die && child_die->tag)
5219 if (child_die->tag != DW_TAG_enumerator)
5221 process_die (child_die, cu);
5225 name = dwarf2_name (child_die, cu);
5228 sym = new_symbol (child_die, this_type, cu);
5229 if (SYMBOL_VALUE (sym) < 0)
5232 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
5234 fields = (struct field *)
5236 (num_fields + DW_FIELD_ALLOC_CHUNK)
5237 * sizeof (struct field));
5240 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
5241 FIELD_TYPE (fields[num_fields]) = NULL;
5242 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
5243 FIELD_BITSIZE (fields[num_fields]) = 0;
5249 child_die = sibling_die (child_die);
5254 TYPE_NFIELDS (this_type) = num_fields;
5255 TYPE_FIELDS (this_type) = (struct field *)
5256 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
5257 memcpy (TYPE_FIELDS (this_type), fields,
5258 sizeof (struct field) * num_fields);
5262 TYPE_UNSIGNED (this_type) = 1;
5265 new_symbol (die, this_type, cu);
5268 /* Extract all information from a DW_TAG_array_type DIE and put it in
5269 the DIE's type field. For now, this only handles one dimensional
5272 static struct type *
5273 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
5275 struct objfile *objfile = cu->objfile;
5276 struct die_info *child_die;
5277 struct type *type = NULL;
5278 struct type *element_type, *range_type, *index_type;
5279 struct type **range_types = NULL;
5280 struct attribute *attr;
5282 struct cleanup *back_to;
5285 element_type = die_type (die, cu);
5287 /* Irix 6.2 native cc creates array types without children for
5288 arrays with unspecified length. */
5289 if (die->child == NULL)
5291 index_type = objfile_type (objfile)->builtin_int;
5292 range_type = create_range_type (NULL, index_type, 0, -1);
5293 type = create_array_type (NULL, element_type, range_type);
5294 return set_die_type (die, type, cu);
5297 back_to = make_cleanup (null_cleanup, NULL);
5298 child_die = die->child;
5299 while (child_die && child_die->tag)
5301 if (child_die->tag == DW_TAG_subrange_type)
5303 struct type *child_type = read_type_die (child_die, cu);
5304 if (child_type != NULL)
5306 /* The range type was succesfully read. Save it for
5307 the array type creation. */
5308 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
5310 range_types = (struct type **)
5311 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
5312 * sizeof (struct type *));
5314 make_cleanup (free_current_contents, &range_types);
5316 range_types[ndim++] = child_type;
5319 child_die = sibling_die (child_die);
5322 /* Dwarf2 dimensions are output from left to right, create the
5323 necessary array types in backwards order. */
5325 type = element_type;
5327 if (read_array_order (die, cu) == DW_ORD_col_major)
5331 type = create_array_type (NULL, type, range_types[i++]);
5336 type = create_array_type (NULL, type, range_types[ndim]);
5339 /* Understand Dwarf2 support for vector types (like they occur on
5340 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5341 array type. This is not part of the Dwarf2/3 standard yet, but a
5342 custom vendor extension. The main difference between a regular
5343 array and the vector variant is that vectors are passed by value
5345 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
5347 make_vector_type (type);
5349 name = dwarf2_name (die, cu);
5351 TYPE_NAME (type) = name;
5353 do_cleanups (back_to);
5355 /* Install the type in the die. */
5356 return set_die_type (die, type, cu);
5359 static enum dwarf_array_dim_ordering
5360 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
5362 struct attribute *attr;
5364 attr = dwarf2_attr (die, DW_AT_ordering, cu);
5366 if (attr) return DW_SND (attr);
5369 GNU F77 is a special case, as at 08/2004 array type info is the
5370 opposite order to the dwarf2 specification, but data is still
5371 laid out as per normal fortran.
5373 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5377 if (cu->language == language_fortran &&
5378 cu->producer && strstr (cu->producer, "GNU F77"))
5380 return DW_ORD_row_major;
5383 switch (cu->language_defn->la_array_ordering)
5385 case array_column_major:
5386 return DW_ORD_col_major;
5387 case array_row_major:
5389 return DW_ORD_row_major;
5393 /* Extract all information from a DW_TAG_set_type DIE and put it in
5394 the DIE's type field. */
5396 static struct type *
5397 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
5399 struct type *set_type = create_set_type (NULL, die_type (die, cu));
5401 return set_die_type (die, set_type, cu);
5404 /* First cut: install each common block member as a global variable. */
5407 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
5409 struct die_info *child_die;
5410 struct attribute *attr;
5412 CORE_ADDR base = (CORE_ADDR) 0;
5414 attr = dwarf2_attr (die, DW_AT_location, cu);
5417 /* Support the .debug_loc offsets */
5418 if (attr_form_is_block (attr))
5420 base = decode_locdesc (DW_BLOCK (attr), cu);
5422 else if (attr_form_is_section_offset (attr))
5424 dwarf2_complex_location_expr_complaint ();
5428 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5429 "common block member");
5432 if (die->child != NULL)
5434 child_die = die->child;
5435 while (child_die && child_die->tag)
5437 sym = new_symbol (child_die, NULL, cu);
5438 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
5441 SYMBOL_VALUE_ADDRESS (sym) =
5442 base + decode_locdesc (DW_BLOCK (attr), cu);
5443 add_symbol_to_list (sym, &global_symbols);
5445 child_die = sibling_die (child_die);
5450 /* Create a type for a C++ namespace. */
5452 static struct type *
5453 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
5455 struct objfile *objfile = cu->objfile;
5456 const char *previous_prefix, *name;
5460 /* For extensions, reuse the type of the original namespace. */
5461 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
5463 struct die_info *ext_die;
5464 struct dwarf2_cu *ext_cu = cu;
5465 ext_die = dwarf2_extension (die, &ext_cu);
5466 type = read_type_die (ext_die, ext_cu);
5467 return set_die_type (die, type, cu);
5470 name = namespace_name (die, &is_anonymous, cu);
5472 /* Now build the name of the current namespace. */
5474 previous_prefix = determine_prefix (die, cu);
5475 if (previous_prefix[0] != '\0')
5476 name = typename_concat (&objfile->objfile_obstack,
5477 previous_prefix, name, cu);
5479 /* Create the type. */
5480 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
5482 TYPE_NAME (type) = (char *) name;
5483 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5485 set_die_type (die, type, cu);
5490 /* Read a C++ namespace. */
5493 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
5495 struct objfile *objfile = cu->objfile;
5499 /* Add a symbol associated to this if we haven't seen the namespace
5500 before. Also, add a using directive if it's an anonymous
5503 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
5507 type = read_type_die (die, cu);
5508 new_symbol (die, type, cu);
5510 name = namespace_name (die, &is_anonymous, cu);
5513 const char *previous_prefix = determine_prefix (die, cu);
5514 cp_add_using_directive (previous_prefix, TYPE_NAME (type));
5518 if (die->child != NULL)
5520 struct die_info *child_die = die->child;
5522 while (child_die && child_die->tag)
5524 process_die (child_die, cu);
5525 child_die = sibling_die (child_die);
5530 /* Read a Fortran module. */
5533 read_module (struct die_info *die, struct dwarf2_cu *cu)
5535 struct die_info *child_die = die->child;
5537 /* FIXME: Support the separate Fortran module namespaces. */
5539 while (child_die && child_die->tag)
5541 process_die (child_die, cu);
5542 child_die = sibling_die (child_die);
5546 /* Return the name of the namespace represented by DIE. Set
5547 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5551 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
5553 struct die_info *current_die;
5554 const char *name = NULL;
5556 /* Loop through the extensions until we find a name. */
5558 for (current_die = die;
5559 current_die != NULL;
5560 current_die = dwarf2_extension (die, &cu))
5562 name = dwarf2_name (current_die, cu);
5567 /* Is it an anonymous namespace? */
5569 *is_anonymous = (name == NULL);
5571 name = "(anonymous namespace)";
5576 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5577 the user defined type vector. */
5579 static struct type *
5580 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
5582 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
5583 struct comp_unit_head *cu_header = &cu->header;
5585 struct attribute *attr_byte_size;
5586 struct attribute *attr_address_class;
5587 int byte_size, addr_class;
5589 type = lookup_pointer_type (die_type (die, cu));
5591 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
5593 byte_size = DW_UNSND (attr_byte_size);
5595 byte_size = cu_header->addr_size;
5597 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
5598 if (attr_address_class)
5599 addr_class = DW_UNSND (attr_address_class);
5601 addr_class = DW_ADDR_none;
5603 /* If the pointer size or address class is different than the
5604 default, create a type variant marked as such and set the
5605 length accordingly. */
5606 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
5608 if (gdbarch_address_class_type_flags_p (gdbarch))
5612 type_flags = gdbarch_address_class_type_flags
5613 (gdbarch, byte_size, addr_class);
5614 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
5616 type = make_type_with_address_space (type, type_flags);
5618 else if (TYPE_LENGTH (type) != byte_size)
5620 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
5623 /* Should we also complain about unhandled address classes? */
5627 TYPE_LENGTH (type) = byte_size;
5628 return set_die_type (die, type, cu);
5631 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5632 the user defined type vector. */
5634 static struct type *
5635 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
5637 struct objfile *objfile = cu->objfile;
5639 struct type *to_type;
5640 struct type *domain;
5642 to_type = die_type (die, cu);
5643 domain = die_containing_type (die, cu);
5645 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
5646 type = lookup_methodptr_type (to_type);
5648 type = lookup_memberptr_type (to_type, domain);
5650 return set_die_type (die, type, cu);
5653 /* Extract all information from a DW_TAG_reference_type DIE and add to
5654 the user defined type vector. */
5656 static struct type *
5657 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
5659 struct comp_unit_head *cu_header = &cu->header;
5661 struct attribute *attr;
5663 type = lookup_reference_type (die_type (die, cu));
5664 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5667 TYPE_LENGTH (type) = DW_UNSND (attr);
5671 TYPE_LENGTH (type) = cu_header->addr_size;
5673 return set_die_type (die, type, cu);
5676 static struct type *
5677 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
5679 struct type *base_type, *cv_type;
5681 base_type = die_type (die, cu);
5682 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
5683 return set_die_type (die, cv_type, cu);
5686 static struct type *
5687 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
5689 struct type *base_type, *cv_type;
5691 base_type = die_type (die, cu);
5692 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
5693 return set_die_type (die, cv_type, cu);
5696 /* Extract all information from a DW_TAG_string_type DIE and add to
5697 the user defined type vector. It isn't really a user defined type,
5698 but it behaves like one, with other DIE's using an AT_user_def_type
5699 attribute to reference it. */
5701 static struct type *
5702 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
5704 struct objfile *objfile = cu->objfile;
5705 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5706 struct type *type, *range_type, *index_type, *char_type;
5707 struct attribute *attr;
5708 unsigned int length;
5710 attr = dwarf2_attr (die, DW_AT_string_length, cu);
5713 length = DW_UNSND (attr);
5717 /* check for the DW_AT_byte_size attribute */
5718 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5721 length = DW_UNSND (attr);
5729 index_type = objfile_type (objfile)->builtin_int;
5730 range_type = create_range_type (NULL, index_type, 1, length);
5731 char_type = language_string_char_type (cu->language_defn, gdbarch);
5732 type = create_string_type (NULL, char_type, range_type);
5734 return set_die_type (die, type, cu);
5737 /* Handle DIES due to C code like:
5741 int (*funcp)(int a, long l);
5745 ('funcp' generates a DW_TAG_subroutine_type DIE)
5748 static struct type *
5749 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
5751 struct type *type; /* Type that this function returns */
5752 struct type *ftype; /* Function that returns above type */
5753 struct attribute *attr;
5755 type = die_type (die, cu);
5756 ftype = lookup_function_type (type);
5758 /* All functions in C++, Pascal and Java have prototypes. */
5759 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
5760 if ((attr && (DW_UNSND (attr) != 0))
5761 || cu->language == language_cplus
5762 || cu->language == language_java
5763 || cu->language == language_pascal)
5764 TYPE_PROTOTYPED (ftype) = 1;
5766 /* Store the calling convention in the type if it's available in
5767 the subroutine die. Otherwise set the calling convention to
5768 the default value DW_CC_normal. */
5769 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
5770 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
5772 if (die->child != NULL)
5774 struct die_info *child_die;
5778 /* Count the number of parameters.
5779 FIXME: GDB currently ignores vararg functions, but knows about
5780 vararg member functions. */
5781 child_die = die->child;
5782 while (child_die && child_die->tag)
5784 if (child_die->tag == DW_TAG_formal_parameter)
5786 else if (child_die->tag == DW_TAG_unspecified_parameters)
5787 TYPE_VARARGS (ftype) = 1;
5788 child_die = sibling_die (child_die);
5791 /* Allocate storage for parameters and fill them in. */
5792 TYPE_NFIELDS (ftype) = nparams;
5793 TYPE_FIELDS (ftype) = (struct field *)
5794 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
5796 child_die = die->child;
5797 while (child_die && child_die->tag)
5799 if (child_die->tag == DW_TAG_formal_parameter)
5801 /* Dwarf2 has no clean way to discern C++ static and non-static
5802 member functions. G++ helps GDB by marking the first
5803 parameter for non-static member functions (which is the
5804 this pointer) as artificial. We pass this information
5805 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5806 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
5808 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
5810 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
5811 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
5814 child_die = sibling_die (child_die);
5818 return set_die_type (die, ftype, cu);
5821 static struct type *
5822 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
5824 struct objfile *objfile = cu->objfile;
5825 struct attribute *attr;
5826 const char *name = NULL;
5827 struct type *this_type;
5829 name = dwarf2_full_name (die, cu);
5830 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
5831 TYPE_FLAG_TARGET_STUB, NULL, objfile);
5832 TYPE_NAME (this_type) = (char *) name;
5833 set_die_type (die, this_type, cu);
5834 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
5838 /* Find a representation of a given base type and install
5839 it in the TYPE field of the die. */
5841 static struct type *
5842 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
5844 struct objfile *objfile = cu->objfile;
5846 struct attribute *attr;
5847 int encoding = 0, size = 0;
5849 enum type_code code = TYPE_CODE_INT;
5851 struct type *target_type = NULL;
5853 attr = dwarf2_attr (die, DW_AT_encoding, cu);
5856 encoding = DW_UNSND (attr);
5858 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5861 size = DW_UNSND (attr);
5863 name = dwarf2_name (die, cu);
5866 complaint (&symfile_complaints,
5867 _("DW_AT_name missing from DW_TAG_base_type"));
5872 case DW_ATE_address:
5873 /* Turn DW_ATE_address into a void * pointer. */
5874 code = TYPE_CODE_PTR;
5875 type_flags |= TYPE_FLAG_UNSIGNED;
5876 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
5878 case DW_ATE_boolean:
5879 code = TYPE_CODE_BOOL;
5880 type_flags |= TYPE_FLAG_UNSIGNED;
5882 case DW_ATE_complex_float:
5883 code = TYPE_CODE_COMPLEX;
5884 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
5886 case DW_ATE_decimal_float:
5887 code = TYPE_CODE_DECFLOAT;
5890 code = TYPE_CODE_FLT;
5894 case DW_ATE_unsigned:
5895 type_flags |= TYPE_FLAG_UNSIGNED;
5897 case DW_ATE_signed_char:
5898 if (cu->language == language_ada || cu->language == language_m2
5899 || cu->language == language_pascal)
5900 code = TYPE_CODE_CHAR;
5902 case DW_ATE_unsigned_char:
5903 if (cu->language == language_ada || cu->language == language_m2
5904 || cu->language == language_pascal)
5905 code = TYPE_CODE_CHAR;
5906 type_flags |= TYPE_FLAG_UNSIGNED;
5909 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
5910 dwarf_type_encoding_name (encoding));
5914 type = init_type (code, size, type_flags, NULL, objfile);
5915 TYPE_NAME (type) = name;
5916 TYPE_TARGET_TYPE (type) = target_type;
5918 if (name && strcmp (name, "char") == 0)
5919 TYPE_NOSIGN (type) = 1;
5921 return set_die_type (die, type, cu);
5924 /* Read the given DW_AT_subrange DIE. */
5926 static struct type *
5927 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
5929 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
5930 struct type *base_type;
5931 struct type *range_type;
5932 struct attribute *attr;
5937 base_type = die_type (die, cu);
5938 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
5940 complaint (&symfile_complaints,
5941 _("DW_AT_type missing from DW_TAG_subrange_type"));
5943 = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8,
5944 0, NULL, cu->objfile);
5947 if (cu->language == language_fortran)
5949 /* FORTRAN implies a lower bound of 1, if not given. */
5953 /* FIXME: For variable sized arrays either of these could be
5954 a variable rather than a constant value. We'll allow it,
5955 but we don't know how to handle it. */
5956 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
5958 low = dwarf2_get_attr_constant_value (attr, 0);
5960 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
5963 if (attr->form == DW_FORM_block1)
5965 /* GCC encodes arrays with unspecified or dynamic length
5966 with a DW_FORM_block1 attribute.
5967 FIXME: GDB does not yet know how to handle dynamic
5968 arrays properly, treat them as arrays with unspecified
5971 FIXME: jimb/2003-09-22: GDB does not really know
5972 how to handle arrays of unspecified length
5973 either; we just represent them as zero-length
5974 arrays. Choose an appropriate upper bound given
5975 the lower bound we've computed above. */
5979 high = dwarf2_get_attr_constant_value (attr, 1);
5982 range_type = create_range_type (NULL, base_type, low, high);
5984 name = dwarf2_name (die, cu);
5986 TYPE_NAME (range_type) = name;
5988 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5990 TYPE_LENGTH (range_type) = DW_UNSND (attr);
5992 return set_die_type (die, range_type, cu);
5995 static struct type *
5996 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
6000 /* For now, we only support the C meaning of an unspecified type: void. */
6002 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
6003 TYPE_NAME (type) = dwarf2_name (die, cu);
6005 return set_die_type (die, type, cu);
6008 /* Trivial hash function for die_info: the hash value of a DIE
6009 is its offset in .debug_info for this objfile. */
6012 die_hash (const void *item)
6014 const struct die_info *die = item;
6018 /* Trivial comparison function for die_info structures: two DIEs
6019 are equal if they have the same offset. */
6022 die_eq (const void *item_lhs, const void *item_rhs)
6024 const struct die_info *die_lhs = item_lhs;
6025 const struct die_info *die_rhs = item_rhs;
6026 return die_lhs->offset == die_rhs->offset;
6029 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6032 init_cu_die_reader (struct die_reader_specs *reader,
6033 struct dwarf2_cu *cu)
6035 reader->abfd = cu->objfile->obfd;
6037 if (cu->per_cu->from_debug_types)
6038 reader->buffer = dwarf2_per_objfile->types.buffer;
6040 reader->buffer = dwarf2_per_objfile->info.buffer;
6043 /* Read a whole compilation unit into a linked list of dies. */
6045 static struct die_info *
6046 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
6048 struct die_reader_specs reader_specs;
6050 gdb_assert (cu->die_hash == NULL);
6052 = htab_create_alloc_ex (cu->header.length / 12,
6056 &cu->comp_unit_obstack,
6057 hashtab_obstack_allocate,
6058 dummy_obstack_deallocate);
6060 init_cu_die_reader (&reader_specs, cu);
6062 return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
6065 /* Main entry point for reading a DIE and all children.
6066 Read the DIE and dump it if requested. */
6068 static struct die_info *
6069 read_die_and_children (const struct die_reader_specs *reader,
6071 gdb_byte **new_info_ptr,
6072 struct die_info *parent)
6074 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
6075 new_info_ptr, parent);
6077 if (dwarf2_die_debug)
6079 fprintf_unfiltered (gdb_stdlog,
6080 "\nRead die from %s of %s:\n",
6081 reader->buffer == dwarf2_per_objfile->info.buffer
6083 : reader->buffer == dwarf2_per_objfile->types.buffer
6085 : "unknown section",
6086 reader->abfd->filename);
6087 dump_die (result, dwarf2_die_debug);
6093 /* Read a single die and all its descendents. Set the die's sibling
6094 field to NULL; set other fields in the die correctly, and set all
6095 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6096 location of the info_ptr after reading all of those dies. PARENT
6097 is the parent of the die in question. */
6099 static struct die_info *
6100 read_die_and_children_1 (const struct die_reader_specs *reader,
6102 gdb_byte **new_info_ptr,
6103 struct die_info *parent)
6105 struct die_info *die;
6109 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
6112 *new_info_ptr = cur_ptr;
6115 store_in_ref_table (die, reader->cu);
6118 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
6122 *new_info_ptr = cur_ptr;
6125 die->sibling = NULL;
6126 die->parent = parent;
6130 /* Read a die, all of its descendents, and all of its siblings; set
6131 all of the fields of all of the dies correctly. Arguments are as
6132 in read_die_and_children. */
6134 static struct die_info *
6135 read_die_and_siblings (const struct die_reader_specs *reader,
6137 gdb_byte **new_info_ptr,
6138 struct die_info *parent)
6140 struct die_info *first_die, *last_sibling;
6144 first_die = last_sibling = NULL;
6148 struct die_info *die
6149 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
6153 *new_info_ptr = cur_ptr;
6160 last_sibling->sibling = die;
6166 /* Read the die from the .debug_info section buffer. Set DIEP to
6167 point to a newly allocated die with its information, except for its
6168 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6169 whether the die has children or not. */
6172 read_full_die (const struct die_reader_specs *reader,
6173 struct die_info **diep, gdb_byte *info_ptr,
6176 unsigned int abbrev_number, bytes_read, i, offset;
6177 struct abbrev_info *abbrev;
6178 struct die_info *die;
6179 struct dwarf2_cu *cu = reader->cu;
6180 bfd *abfd = reader->abfd;
6182 offset = info_ptr - reader->buffer;
6183 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6184 info_ptr += bytes_read;
6192 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
6194 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6196 bfd_get_filename (abfd));
6198 die = dwarf_alloc_die (cu, abbrev->num_attrs);
6199 die->offset = offset;
6200 die->tag = abbrev->tag;
6201 die->abbrev = abbrev_number;
6203 die->num_attrs = abbrev->num_attrs;
6205 for (i = 0; i < abbrev->num_attrs; ++i)
6206 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
6207 abfd, info_ptr, cu);
6210 *has_children = abbrev->has_children;
6214 /* In DWARF version 2, the description of the debugging information is
6215 stored in a separate .debug_abbrev section. Before we read any
6216 dies from a section we read in all abbreviations and install them
6217 in a hash table. This function also sets flags in CU describing
6218 the data found in the abbrev table. */
6221 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
6223 struct comp_unit_head *cu_header = &cu->header;
6224 gdb_byte *abbrev_ptr;
6225 struct abbrev_info *cur_abbrev;
6226 unsigned int abbrev_number, bytes_read, abbrev_name;
6227 unsigned int abbrev_form, hash_number;
6228 struct attr_abbrev *cur_attrs;
6229 unsigned int allocated_attrs;
6231 /* Initialize dwarf2 abbrevs */
6232 obstack_init (&cu->abbrev_obstack);
6233 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
6235 * sizeof (struct abbrev_info *)));
6236 memset (cu->dwarf2_abbrevs, 0,
6237 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
6239 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
6240 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6241 abbrev_ptr += bytes_read;
6243 allocated_attrs = ATTR_ALLOC_CHUNK;
6244 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
6246 /* loop until we reach an abbrev number of 0 */
6247 while (abbrev_number)
6249 cur_abbrev = dwarf_alloc_abbrev (cu);
6251 /* read in abbrev header */
6252 cur_abbrev->number = abbrev_number;
6253 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6254 abbrev_ptr += bytes_read;
6255 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
6258 if (cur_abbrev->tag == DW_TAG_namespace)
6259 cu->has_namespace_info = 1;
6261 /* now read in declarations */
6262 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6263 abbrev_ptr += bytes_read;
6264 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6265 abbrev_ptr += bytes_read;
6268 if (cur_abbrev->num_attrs == allocated_attrs)
6270 allocated_attrs += ATTR_ALLOC_CHUNK;
6272 = xrealloc (cur_attrs, (allocated_attrs
6273 * sizeof (struct attr_abbrev)));
6276 /* Record whether this compilation unit might have
6277 inter-compilation-unit references. If we don't know what form
6278 this attribute will have, then it might potentially be a
6279 DW_FORM_ref_addr, so we conservatively expect inter-CU
6282 if (abbrev_form == DW_FORM_ref_addr
6283 || abbrev_form == DW_FORM_indirect)
6284 cu->has_form_ref_addr = 1;
6286 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
6287 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
6288 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6289 abbrev_ptr += bytes_read;
6290 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6291 abbrev_ptr += bytes_read;
6294 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
6295 (cur_abbrev->num_attrs
6296 * sizeof (struct attr_abbrev)));
6297 memcpy (cur_abbrev->attrs, cur_attrs,
6298 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
6300 hash_number = abbrev_number % ABBREV_HASH_SIZE;
6301 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
6302 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
6304 /* Get next abbreviation.
6305 Under Irix6 the abbreviations for a compilation unit are not
6306 always properly terminated with an abbrev number of 0.
6307 Exit loop if we encounter an abbreviation which we have
6308 already read (which means we are about to read the abbreviations
6309 for the next compile unit) or if the end of the abbreviation
6310 table is reached. */
6311 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
6312 >= dwarf2_per_objfile->abbrev.size)
6314 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6315 abbrev_ptr += bytes_read;
6316 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
6323 /* Release the memory used by the abbrev table for a compilation unit. */
6326 dwarf2_free_abbrev_table (void *ptr_to_cu)
6328 struct dwarf2_cu *cu = ptr_to_cu;
6330 obstack_free (&cu->abbrev_obstack, NULL);
6331 cu->dwarf2_abbrevs = NULL;
6334 /* Lookup an abbrev_info structure in the abbrev hash table. */
6336 static struct abbrev_info *
6337 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
6339 unsigned int hash_number;
6340 struct abbrev_info *abbrev;
6342 hash_number = number % ABBREV_HASH_SIZE;
6343 abbrev = cu->dwarf2_abbrevs[hash_number];
6347 if (abbrev->number == number)
6350 abbrev = abbrev->next;
6355 /* Returns nonzero if TAG represents a type that we might generate a partial
6359 is_type_tag_for_partial (int tag)
6364 /* Some types that would be reasonable to generate partial symbols for,
6365 that we don't at present. */
6366 case DW_TAG_array_type:
6367 case DW_TAG_file_type:
6368 case DW_TAG_ptr_to_member_type:
6369 case DW_TAG_set_type:
6370 case DW_TAG_string_type:
6371 case DW_TAG_subroutine_type:
6373 case DW_TAG_base_type:
6374 case DW_TAG_class_type:
6375 case DW_TAG_interface_type:
6376 case DW_TAG_enumeration_type:
6377 case DW_TAG_structure_type:
6378 case DW_TAG_subrange_type:
6379 case DW_TAG_typedef:
6380 case DW_TAG_union_type:
6387 /* Load all DIEs that are interesting for partial symbols into memory. */
6389 static struct partial_die_info *
6390 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
6391 int building_psymtab, struct dwarf2_cu *cu)
6393 struct partial_die_info *part_die;
6394 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
6395 struct abbrev_info *abbrev;
6396 unsigned int bytes_read;
6397 unsigned int load_all = 0;
6399 int nesting_level = 1;
6404 if (cu->per_cu && cu->per_cu->load_all_dies)
6408 = htab_create_alloc_ex (cu->header.length / 12,
6412 &cu->comp_unit_obstack,
6413 hashtab_obstack_allocate,
6414 dummy_obstack_deallocate);
6416 part_die = obstack_alloc (&cu->comp_unit_obstack,
6417 sizeof (struct partial_die_info));
6421 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6423 /* A NULL abbrev means the end of a series of children. */
6426 if (--nesting_level == 0)
6428 /* PART_DIE was probably the last thing allocated on the
6429 comp_unit_obstack, so we could call obstack_free
6430 here. We don't do that because the waste is small,
6431 and will be cleaned up when we're done with this
6432 compilation unit. This way, we're also more robust
6433 against other users of the comp_unit_obstack. */
6436 info_ptr += bytes_read;
6437 last_die = parent_die;
6438 parent_die = parent_die->die_parent;
6442 /* Check whether this DIE is interesting enough to save. Normally
6443 we would not be interested in members here, but there may be
6444 later variables referencing them via DW_AT_specification (for
6447 && !is_type_tag_for_partial (abbrev->tag)
6448 && abbrev->tag != DW_TAG_enumerator
6449 && abbrev->tag != DW_TAG_subprogram
6450 && abbrev->tag != DW_TAG_lexical_block
6451 && abbrev->tag != DW_TAG_variable
6452 && abbrev->tag != DW_TAG_namespace
6453 && abbrev->tag != DW_TAG_member)
6455 /* Otherwise we skip to the next sibling, if any. */
6456 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
6460 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
6461 buffer, info_ptr, cu);
6463 /* This two-pass algorithm for processing partial symbols has a
6464 high cost in cache pressure. Thus, handle some simple cases
6465 here which cover the majority of C partial symbols. DIEs
6466 which neither have specification tags in them, nor could have
6467 specification tags elsewhere pointing at them, can simply be
6468 processed and discarded.
6470 This segment is also optional; scan_partial_symbols and
6471 add_partial_symbol will handle these DIEs if we chain
6472 them in normally. When compilers which do not emit large
6473 quantities of duplicate debug information are more common,
6474 this code can probably be removed. */
6476 /* Any complete simple types at the top level (pretty much all
6477 of them, for a language without namespaces), can be processed
6479 if (parent_die == NULL
6480 && part_die->has_specification == 0
6481 && part_die->is_declaration == 0
6482 && (part_die->tag == DW_TAG_typedef
6483 || part_die->tag == DW_TAG_base_type
6484 || part_die->tag == DW_TAG_subrange_type))
6486 if (building_psymtab && part_die->name != NULL)
6487 add_psymbol_to_list (part_die->name, strlen (part_die->name),
6488 VAR_DOMAIN, LOC_TYPEDEF,
6489 &cu->objfile->static_psymbols,
6490 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6491 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6495 /* If we're at the second level, and we're an enumerator, and
6496 our parent has no specification (meaning possibly lives in a
6497 namespace elsewhere), then we can add the partial symbol now
6498 instead of queueing it. */
6499 if (part_die->tag == DW_TAG_enumerator
6500 && parent_die != NULL
6501 && parent_die->die_parent == NULL
6502 && parent_die->tag == DW_TAG_enumeration_type
6503 && parent_die->has_specification == 0)
6505 if (part_die->name == NULL)
6506 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6507 else if (building_psymtab)
6508 add_psymbol_to_list (part_die->name, strlen (part_die->name),
6509 VAR_DOMAIN, LOC_CONST,
6510 (cu->language == language_cplus
6511 || cu->language == language_java)
6512 ? &cu->objfile->global_psymbols
6513 : &cu->objfile->static_psymbols,
6514 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6516 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6520 /* We'll save this DIE so link it in. */
6521 part_die->die_parent = parent_die;
6522 part_die->die_sibling = NULL;
6523 part_die->die_child = NULL;
6525 if (last_die && last_die == parent_die)
6526 last_die->die_child = part_die;
6528 last_die->die_sibling = part_die;
6530 last_die = part_die;
6532 if (first_die == NULL)
6533 first_die = part_die;
6535 /* Maybe add the DIE to the hash table. Not all DIEs that we
6536 find interesting need to be in the hash table, because we
6537 also have the parent/sibling/child chains; only those that we
6538 might refer to by offset later during partial symbol reading.
6540 For now this means things that might have be the target of a
6541 DW_AT_specification, DW_AT_abstract_origin, or
6542 DW_AT_extension. DW_AT_extension will refer only to
6543 namespaces; DW_AT_abstract_origin refers to functions (and
6544 many things under the function DIE, but we do not recurse
6545 into function DIEs during partial symbol reading) and
6546 possibly variables as well; DW_AT_specification refers to
6547 declarations. Declarations ought to have the DW_AT_declaration
6548 flag. It happens that GCC forgets to put it in sometimes, but
6549 only for functions, not for types.
6551 Adding more things than necessary to the hash table is harmless
6552 except for the performance cost. Adding too few will result in
6553 wasted time in find_partial_die, when we reread the compilation
6554 unit with load_all_dies set. */
6557 || abbrev->tag == DW_TAG_subprogram
6558 || abbrev->tag == DW_TAG_variable
6559 || abbrev->tag == DW_TAG_namespace
6560 || part_die->is_declaration)
6564 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
6565 part_die->offset, INSERT);
6569 part_die = obstack_alloc (&cu->comp_unit_obstack,
6570 sizeof (struct partial_die_info));
6572 /* For some DIEs we want to follow their children (if any). For C
6573 we have no reason to follow the children of structures; for other
6574 languages we have to, both so that we can get at method physnames
6575 to infer fully qualified class names, and for DW_AT_specification.
6577 For Ada, we need to scan the children of subprograms and lexical
6578 blocks as well because Ada allows the definition of nested
6579 entities that could be interesting for the debugger, such as
6580 nested subprograms for instance. */
6581 if (last_die->has_children
6583 || last_die->tag == DW_TAG_namespace
6584 || last_die->tag == DW_TAG_enumeration_type
6585 || (cu->language != language_c
6586 && (last_die->tag == DW_TAG_class_type
6587 || last_die->tag == DW_TAG_interface_type
6588 || last_die->tag == DW_TAG_structure_type
6589 || last_die->tag == DW_TAG_union_type))
6590 || (cu->language == language_ada
6591 && (last_die->tag == DW_TAG_subprogram
6592 || last_die->tag == DW_TAG_lexical_block))))
6595 parent_die = last_die;
6599 /* Otherwise we skip to the next sibling, if any. */
6600 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
6602 /* Back to the top, do it again. */
6606 /* Read a minimal amount of information into the minimal die structure. */
6609 read_partial_die (struct partial_die_info *part_die,
6610 struct abbrev_info *abbrev,
6611 unsigned int abbrev_len, bfd *abfd,
6612 gdb_byte *buffer, gdb_byte *info_ptr,
6613 struct dwarf2_cu *cu)
6615 unsigned int bytes_read, i;
6616 struct attribute attr;
6617 int has_low_pc_attr = 0;
6618 int has_high_pc_attr = 0;
6619 CORE_ADDR base_address = 0;
6623 base_address_low_pc,
6624 /* Overrides BASE_ADDRESS_LOW_PC. */
6625 base_address_entry_pc
6627 base_address_type = base_address_none;
6629 memset (part_die, 0, sizeof (struct partial_die_info));
6631 part_die->offset = info_ptr - buffer;
6633 info_ptr += abbrev_len;
6638 part_die->tag = abbrev->tag;
6639 part_die->has_children = abbrev->has_children;
6641 for (i = 0; i < abbrev->num_attrs; ++i)
6643 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
6645 /* Store the data if it is of an attribute we want to keep in a
6646 partial symbol table. */
6650 switch (part_die->tag)
6652 case DW_TAG_compile_unit:
6653 case DW_TAG_type_unit:
6654 /* Compilation units have a DW_AT_name that is a filename, not
6655 a source language identifier. */
6656 case DW_TAG_enumeration_type:
6657 case DW_TAG_enumerator:
6658 /* These tags always have simple identifiers already; no need
6659 to canonicalize them. */
6660 part_die->name = DW_STRING (&attr);
6664 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
6665 &cu->comp_unit_obstack);
6669 case DW_AT_comp_dir:
6670 if (part_die->dirname == NULL)
6671 part_die->dirname = DW_STRING (&attr);
6673 case DW_AT_MIPS_linkage_name:
6674 part_die->name = DW_STRING (&attr);
6677 has_low_pc_attr = 1;
6678 part_die->lowpc = DW_ADDR (&attr);
6679 if (part_die->tag == DW_TAG_compile_unit
6680 && base_address_type < base_address_low_pc)
6682 base_address = DW_ADDR (&attr);
6683 base_address_type = base_address_low_pc;
6687 has_high_pc_attr = 1;
6688 part_die->highpc = DW_ADDR (&attr);
6690 case DW_AT_entry_pc:
6691 if (part_die->tag == DW_TAG_compile_unit
6692 && base_address_type < base_address_entry_pc)
6694 base_address = DW_ADDR (&attr);
6695 base_address_type = base_address_entry_pc;
6699 if (part_die->tag == DW_TAG_compile_unit)
6701 cu->ranges_offset = DW_UNSND (&attr);
6702 cu->has_ranges_offset = 1;
6705 case DW_AT_location:
6706 /* Support the .debug_loc offsets */
6707 if (attr_form_is_block (&attr))
6709 part_die->locdesc = DW_BLOCK (&attr);
6711 else if (attr_form_is_section_offset (&attr))
6713 dwarf2_complex_location_expr_complaint ();
6717 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6718 "partial symbol information");
6721 case DW_AT_language:
6722 part_die->language = DW_UNSND (&attr);
6724 case DW_AT_external:
6725 part_die->is_external = DW_UNSND (&attr);
6727 case DW_AT_declaration:
6728 part_die->is_declaration = DW_UNSND (&attr);
6731 part_die->has_type = 1;
6733 case DW_AT_abstract_origin:
6734 case DW_AT_specification:
6735 case DW_AT_extension:
6736 part_die->has_specification = 1;
6737 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
6740 /* Ignore absolute siblings, they might point outside of
6741 the current compile unit. */
6742 if (attr.form == DW_FORM_ref_addr)
6743 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
6745 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
6747 case DW_AT_stmt_list:
6748 part_die->has_stmt_list = 1;
6749 part_die->line_offset = DW_UNSND (&attr);
6751 case DW_AT_byte_size:
6752 part_die->has_byte_size = 1;
6754 case DW_AT_calling_convention:
6755 /* DWARF doesn't provide a way to identify a program's source-level
6756 entry point. DW_AT_calling_convention attributes are only meant
6757 to describe functions' calling conventions.
6759 However, because it's a necessary piece of information in
6760 Fortran, and because DW_CC_program is the only piece of debugging
6761 information whose definition refers to a 'main program' at all,
6762 several compilers have begun marking Fortran main programs with
6763 DW_CC_program --- even when those functions use the standard
6764 calling conventions.
6766 So until DWARF specifies a way to provide this information and
6767 compilers pick up the new representation, we'll support this
6769 if (DW_UNSND (&attr) == DW_CC_program
6770 && cu->language == language_fortran)
6771 set_main_name (part_die->name);
6778 /* When using the GNU linker, .gnu.linkonce. sections are used to
6779 eliminate duplicate copies of functions and vtables and such.
6780 The linker will arbitrarily choose one and discard the others.
6781 The AT_*_pc values for such functions refer to local labels in
6782 these sections. If the section from that file was discarded, the
6783 labels are not in the output, so the relocs get a value of 0.
6784 If this is a discarded function, mark the pc bounds as invalid,
6785 so that GDB will ignore it. */
6786 if (has_low_pc_attr && has_high_pc_attr
6787 && part_die->lowpc < part_die->highpc
6788 && (part_die->lowpc != 0
6789 || dwarf2_per_objfile->has_section_at_zero))
6790 part_die->has_pc_info = 1;
6792 if (base_address_type != base_address_none && !cu->base_known)
6794 gdb_assert (part_die->tag == DW_TAG_compile_unit);
6796 cu->base_address = base_address;
6802 /* Find a cached partial DIE at OFFSET in CU. */
6804 static struct partial_die_info *
6805 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
6807 struct partial_die_info *lookup_die = NULL;
6808 struct partial_die_info part_die;
6810 part_die.offset = offset;
6811 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
6816 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6817 except in the case of .debug_types DIEs which do not reference
6818 outside their CU (they do however referencing other types via
6821 static struct partial_die_info *
6822 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
6824 struct dwarf2_per_cu_data *per_cu = NULL;
6825 struct partial_die_info *pd = NULL;
6827 if (cu->per_cu->from_debug_types)
6829 pd = find_partial_die_in_comp_unit (offset, cu);
6835 if (offset_in_cu_p (&cu->header, offset))
6837 pd = find_partial_die_in_comp_unit (offset, cu);
6842 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
6844 if (per_cu->cu == NULL)
6846 load_partial_comp_unit (per_cu, cu->objfile);
6847 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
6848 dwarf2_per_objfile->read_in_chain = per_cu;
6851 per_cu->cu->last_used = 0;
6852 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6854 if (pd == NULL && per_cu->load_all_dies == 0)
6856 struct cleanup *back_to;
6857 struct partial_die_info comp_unit_die;
6858 struct abbrev_info *abbrev;
6859 unsigned int bytes_read;
6862 per_cu->load_all_dies = 1;
6864 /* Re-read the DIEs. */
6865 back_to = make_cleanup (null_cleanup, 0);
6866 if (per_cu->cu->dwarf2_abbrevs == NULL)
6868 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
6869 back_to = make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
6871 info_ptr = (dwarf2_per_objfile->info.buffer
6872 + per_cu->cu->header.offset
6873 + per_cu->cu->header.first_die_offset);
6874 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
6875 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
6876 per_cu->cu->objfile->obfd,
6877 dwarf2_per_objfile->info.buffer, info_ptr,
6879 if (comp_unit_die.has_children)
6880 load_partial_dies (per_cu->cu->objfile->obfd,
6881 dwarf2_per_objfile->info.buffer, info_ptr,
6883 do_cleanups (back_to);
6885 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6891 internal_error (__FILE__, __LINE__,
6892 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6893 offset, bfd_get_filename (cu->objfile->obfd));
6897 /* Adjust PART_DIE before generating a symbol for it. This function
6898 may set the is_external flag or change the DIE's name. */
6901 fixup_partial_die (struct partial_die_info *part_die,
6902 struct dwarf2_cu *cu)
6904 /* If we found a reference attribute and the DIE has no name, try
6905 to find a name in the referred to DIE. */
6907 if (part_die->name == NULL && part_die->has_specification)
6909 struct partial_die_info *spec_die;
6911 spec_die = find_partial_die (part_die->spec_offset, cu);
6913 fixup_partial_die (spec_die, cu);
6917 part_die->name = spec_die->name;
6919 /* Copy DW_AT_external attribute if it is set. */
6920 if (spec_die->is_external)
6921 part_die->is_external = spec_die->is_external;
6925 /* Set default names for some unnamed DIEs. */
6926 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
6927 || part_die->tag == DW_TAG_class_type))
6928 part_die->name = "(anonymous class)";
6930 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
6931 part_die->name = "(anonymous namespace)";
6933 if (part_die->tag == DW_TAG_structure_type
6934 || part_die->tag == DW_TAG_class_type
6935 || part_die->tag == DW_TAG_union_type)
6936 guess_structure_name (part_die, cu);
6939 /* Read an attribute value described by an attribute form. */
6942 read_attribute_value (struct attribute *attr, unsigned form,
6943 bfd *abfd, gdb_byte *info_ptr,
6944 struct dwarf2_cu *cu)
6946 struct comp_unit_head *cu_header = &cu->header;
6947 unsigned int bytes_read;
6948 struct dwarf_block *blk;
6954 case DW_FORM_ref_addr:
6955 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
6956 info_ptr += bytes_read;
6958 case DW_FORM_block2:
6959 blk = dwarf_alloc_block (cu);
6960 blk->size = read_2_bytes (abfd, info_ptr);
6962 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6963 info_ptr += blk->size;
6964 DW_BLOCK (attr) = blk;
6966 case DW_FORM_block4:
6967 blk = dwarf_alloc_block (cu);
6968 blk->size = read_4_bytes (abfd, info_ptr);
6970 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
6971 info_ptr += blk->size;
6972 DW_BLOCK (attr) = blk;
6975 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
6979 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
6983 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
6986 case DW_FORM_string:
6987 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
6988 info_ptr += bytes_read;
6991 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
6993 info_ptr += bytes_read;
6996 blk = dwarf_alloc_block (cu);
6997 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6998 info_ptr += bytes_read;
6999 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7000 info_ptr += blk->size;
7001 DW_BLOCK (attr) = blk;
7003 case DW_FORM_block1:
7004 blk = dwarf_alloc_block (cu);
7005 blk->size = read_1_byte (abfd, info_ptr);
7007 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7008 info_ptr += blk->size;
7009 DW_BLOCK (attr) = blk;
7012 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7016 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7020 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
7021 info_ptr += bytes_read;
7024 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7025 info_ptr += bytes_read;
7028 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
7032 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
7036 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
7040 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
7044 /* Convert the signature to something we can record in DW_UNSND
7046 NOTE: This is NULL if the type wasn't found. */
7047 DW_SIGNATURED_TYPE (attr) =
7048 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
7051 case DW_FORM_ref_udata:
7052 DW_ADDR (attr) = (cu->header.offset
7053 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
7054 info_ptr += bytes_read;
7056 case DW_FORM_indirect:
7057 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7058 info_ptr += bytes_read;
7059 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
7062 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7063 dwarf_form_name (form),
7064 bfd_get_filename (abfd));
7067 /* We have seen instances where the compiler tried to emit a byte
7068 size attribute of -1 which ended up being encoded as an unsigned
7069 0xffffffff. Although 0xffffffff is technically a valid size value,
7070 an object of this size seems pretty unlikely so we can relatively
7071 safely treat these cases as if the size attribute was invalid and
7072 treat them as zero by default. */
7073 if (attr->name == DW_AT_byte_size
7074 && form == DW_FORM_data4
7075 && DW_UNSND (attr) >= 0xffffffff)
7078 (&symfile_complaints,
7079 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
7081 DW_UNSND (attr) = 0;
7087 /* Read an attribute described by an abbreviated attribute. */
7090 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
7091 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
7093 attr->name = abbrev->name;
7094 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
7097 /* read dwarf information from a buffer */
7100 read_1_byte (bfd *abfd, gdb_byte *buf)
7102 return bfd_get_8 (abfd, buf);
7106 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
7108 return bfd_get_signed_8 (abfd, buf);
7112 read_2_bytes (bfd *abfd, gdb_byte *buf)
7114 return bfd_get_16 (abfd, buf);
7118 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
7120 return bfd_get_signed_16 (abfd, buf);
7124 read_4_bytes (bfd *abfd, gdb_byte *buf)
7126 return bfd_get_32 (abfd, buf);
7130 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
7132 return bfd_get_signed_32 (abfd, buf);
7136 read_8_bytes (bfd *abfd, gdb_byte *buf)
7138 return bfd_get_64 (abfd, buf);
7142 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
7143 unsigned int *bytes_read)
7145 struct comp_unit_head *cu_header = &cu->header;
7146 CORE_ADDR retval = 0;
7148 if (cu_header->signed_addr_p)
7150 switch (cu_header->addr_size)
7153 retval = bfd_get_signed_16 (abfd, buf);
7156 retval = bfd_get_signed_32 (abfd, buf);
7159 retval = bfd_get_signed_64 (abfd, buf);
7162 internal_error (__FILE__, __LINE__,
7163 _("read_address: bad switch, signed [in module %s]"),
7164 bfd_get_filename (abfd));
7169 switch (cu_header->addr_size)
7172 retval = bfd_get_16 (abfd, buf);
7175 retval = bfd_get_32 (abfd, buf);
7178 retval = bfd_get_64 (abfd, buf);
7181 internal_error (__FILE__, __LINE__,
7182 _("read_address: bad switch, unsigned [in module %s]"),
7183 bfd_get_filename (abfd));
7187 *bytes_read = cu_header->addr_size;
7191 /* Read the initial length from a section. The (draft) DWARF 3
7192 specification allows the initial length to take up either 4 bytes
7193 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7194 bytes describe the length and all offsets will be 8 bytes in length
7197 An older, non-standard 64-bit format is also handled by this
7198 function. The older format in question stores the initial length
7199 as an 8-byte quantity without an escape value. Lengths greater
7200 than 2^32 aren't very common which means that the initial 4 bytes
7201 is almost always zero. Since a length value of zero doesn't make
7202 sense for the 32-bit format, this initial zero can be considered to
7203 be an escape value which indicates the presence of the older 64-bit
7204 format. As written, the code can't detect (old format) lengths
7205 greater than 4GB. If it becomes necessary to handle lengths
7206 somewhat larger than 4GB, we could allow other small values (such
7207 as the non-sensical values of 1, 2, and 3) to also be used as
7208 escape values indicating the presence of the old format.
7210 The value returned via bytes_read should be used to increment the
7211 relevant pointer after calling read_initial_length().
7213 [ Note: read_initial_length() and read_offset() are based on the
7214 document entitled "DWARF Debugging Information Format", revision
7215 3, draft 8, dated November 19, 2001. This document was obtained
7218 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7220 This document is only a draft and is subject to change. (So beware.)
7222 Details regarding the older, non-standard 64-bit format were
7223 determined empirically by examining 64-bit ELF files produced by
7224 the SGI toolchain on an IRIX 6.5 machine.
7226 - Kevin, July 16, 2002
7230 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
7232 LONGEST length = bfd_get_32 (abfd, buf);
7234 if (length == 0xffffffff)
7236 length = bfd_get_64 (abfd, buf + 4);
7239 else if (length == 0)
7241 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7242 length = bfd_get_64 (abfd, buf);
7253 /* Cover function for read_initial_length.
7254 Returns the length of the object at BUF, and stores the size of the
7255 initial length in *BYTES_READ and stores the size that offsets will be in
7257 If the initial length size is not equivalent to that specified in
7258 CU_HEADER then issue a complaint.
7259 This is useful when reading non-comp-unit headers. */
7262 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
7263 const struct comp_unit_head *cu_header,
7264 unsigned int *bytes_read,
7265 unsigned int *offset_size)
7267 LONGEST length = read_initial_length (abfd, buf, bytes_read);
7269 gdb_assert (cu_header->initial_length_size == 4
7270 || cu_header->initial_length_size == 8
7271 || cu_header->initial_length_size == 12);
7273 if (cu_header->initial_length_size != *bytes_read)
7274 complaint (&symfile_complaints,
7275 _("intermixed 32-bit and 64-bit DWARF sections"));
7277 *offset_size = (*bytes_read == 4) ? 4 : 8;
7281 /* Read an offset from the data stream. The size of the offset is
7282 given by cu_header->offset_size. */
7285 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
7286 unsigned int *bytes_read)
7288 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
7289 *bytes_read = cu_header->offset_size;
7293 /* Read an offset from the data stream. */
7296 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
7300 switch (offset_size)
7303 retval = bfd_get_32 (abfd, buf);
7306 retval = bfd_get_64 (abfd, buf);
7309 internal_error (__FILE__, __LINE__,
7310 _("read_offset_1: bad switch [in module %s]"),
7311 bfd_get_filename (abfd));
7318 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
7320 /* If the size of a host char is 8 bits, we can return a pointer
7321 to the buffer, otherwise we have to copy the data to a buffer
7322 allocated on the temporary obstack. */
7323 gdb_assert (HOST_CHAR_BIT == 8);
7328 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7330 /* If the size of a host char is 8 bits, we can return a pointer
7331 to the string, otherwise we have to copy the string to a buffer
7332 allocated on the temporary obstack. */
7333 gdb_assert (HOST_CHAR_BIT == 8);
7336 *bytes_read_ptr = 1;
7339 *bytes_read_ptr = strlen ((char *) buf) + 1;
7340 return (char *) buf;
7344 read_indirect_string (bfd *abfd, gdb_byte *buf,
7345 const struct comp_unit_head *cu_header,
7346 unsigned int *bytes_read_ptr)
7348 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
7350 if (dwarf2_per_objfile->str.buffer == NULL)
7352 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7353 bfd_get_filename (abfd));
7356 if (str_offset >= dwarf2_per_objfile->str.size)
7358 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7359 bfd_get_filename (abfd));
7362 gdb_assert (HOST_CHAR_BIT == 8);
7363 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
7365 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
7368 static unsigned long
7369 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7371 unsigned long result;
7372 unsigned int num_read;
7382 byte = bfd_get_8 (abfd, buf);
7385 result |= ((unsigned long)(byte & 127) << shift);
7386 if ((byte & 128) == 0)
7392 *bytes_read_ptr = num_read;
7397 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7400 int i, shift, num_read;
7409 byte = bfd_get_8 (abfd, buf);
7412 result |= ((long)(byte & 127) << shift);
7414 if ((byte & 128) == 0)
7419 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
7420 result |= -(((long)1) << shift);
7421 *bytes_read_ptr = num_read;
7425 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7428 skip_leb128 (bfd *abfd, gdb_byte *buf)
7434 byte = bfd_get_8 (abfd, buf);
7436 if ((byte & 128) == 0)
7442 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
7449 cu->language = language_c;
7451 case DW_LANG_C_plus_plus:
7452 cu->language = language_cplus;
7454 case DW_LANG_Fortran77:
7455 case DW_LANG_Fortran90:
7456 case DW_LANG_Fortran95:
7457 cu->language = language_fortran;
7459 case DW_LANG_Mips_Assembler:
7460 cu->language = language_asm;
7463 cu->language = language_java;
7467 cu->language = language_ada;
7469 case DW_LANG_Modula2:
7470 cu->language = language_m2;
7472 case DW_LANG_Pascal83:
7473 cu->language = language_pascal;
7476 cu->language = language_objc;
7478 case DW_LANG_Cobol74:
7479 case DW_LANG_Cobol85:
7481 cu->language = language_minimal;
7484 cu->language_defn = language_def (cu->language);
7487 /* Return the named attribute or NULL if not there. */
7489 static struct attribute *
7490 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
7493 struct attribute *spec = NULL;
7495 for (i = 0; i < die->num_attrs; ++i)
7497 if (die->attrs[i].name == name)
7498 return &die->attrs[i];
7499 if (die->attrs[i].name == DW_AT_specification
7500 || die->attrs[i].name == DW_AT_abstract_origin)
7501 spec = &die->attrs[i];
7506 die = follow_die_ref (die, spec, &cu);
7507 return dwarf2_attr (die, name, cu);
7513 /* Return the named attribute or NULL if not there,
7514 but do not follow DW_AT_specification, etc.
7515 This is for use in contexts where we're reading .debug_types dies.
7516 Following DW_AT_specification, DW_AT_abstract_origin will take us
7517 back up the chain, and we want to go down. */
7519 static struct attribute *
7520 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
7521 struct dwarf2_cu *cu)
7525 for (i = 0; i < die->num_attrs; ++i)
7526 if (die->attrs[i].name == name)
7527 return &die->attrs[i];
7532 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7533 and holds a non-zero value. This function should only be used for
7534 DW_FORM_flag attributes. */
7537 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
7539 struct attribute *attr = dwarf2_attr (die, name, cu);
7541 return (attr && DW_UNSND (attr));
7545 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
7547 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7548 which value is non-zero. However, we have to be careful with
7549 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7550 (via dwarf2_flag_true_p) follows this attribute. So we may
7551 end up accidently finding a declaration attribute that belongs
7552 to a different DIE referenced by the specification attribute,
7553 even though the given DIE does not have a declaration attribute. */
7554 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
7555 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
7558 /* Return the die giving the specification for DIE, if there is
7559 one. *SPEC_CU is the CU containing DIE on input, and the CU
7560 containing the return value on output. If there is no
7561 specification, but there is an abstract origin, that is
7564 static struct die_info *
7565 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
7567 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
7570 if (spec_attr == NULL)
7571 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
7573 if (spec_attr == NULL)
7576 return follow_die_ref (die, spec_attr, spec_cu);
7579 /* Free the line_header structure *LH, and any arrays and strings it
7582 free_line_header (struct line_header *lh)
7584 if (lh->standard_opcode_lengths)
7585 xfree (lh->standard_opcode_lengths);
7587 /* Remember that all the lh->file_names[i].name pointers are
7588 pointers into debug_line_buffer, and don't need to be freed. */
7590 xfree (lh->file_names);
7592 /* Similarly for the include directory names. */
7593 if (lh->include_dirs)
7594 xfree (lh->include_dirs);
7600 /* Add an entry to LH's include directory table. */
7602 add_include_dir (struct line_header *lh, char *include_dir)
7604 /* Grow the array if necessary. */
7605 if (lh->include_dirs_size == 0)
7607 lh->include_dirs_size = 1; /* for testing */
7608 lh->include_dirs = xmalloc (lh->include_dirs_size
7609 * sizeof (*lh->include_dirs));
7611 else if (lh->num_include_dirs >= lh->include_dirs_size)
7613 lh->include_dirs_size *= 2;
7614 lh->include_dirs = xrealloc (lh->include_dirs,
7615 (lh->include_dirs_size
7616 * sizeof (*lh->include_dirs)));
7619 lh->include_dirs[lh->num_include_dirs++] = include_dir;
7623 /* Add an entry to LH's file name table. */
7625 add_file_name (struct line_header *lh,
7627 unsigned int dir_index,
7628 unsigned int mod_time,
7629 unsigned int length)
7631 struct file_entry *fe;
7633 /* Grow the array if necessary. */
7634 if (lh->file_names_size == 0)
7636 lh->file_names_size = 1; /* for testing */
7637 lh->file_names = xmalloc (lh->file_names_size
7638 * sizeof (*lh->file_names));
7640 else if (lh->num_file_names >= lh->file_names_size)
7642 lh->file_names_size *= 2;
7643 lh->file_names = xrealloc (lh->file_names,
7644 (lh->file_names_size
7645 * sizeof (*lh->file_names)));
7648 fe = &lh->file_names[lh->num_file_names++];
7650 fe->dir_index = dir_index;
7651 fe->mod_time = mod_time;
7652 fe->length = length;
7658 /* Read the statement program header starting at OFFSET in
7659 .debug_line, according to the endianness of ABFD. Return a pointer
7660 to a struct line_header, allocated using xmalloc.
7662 NOTE: the strings in the include directory and file name tables of
7663 the returned object point into debug_line_buffer, and must not be
7665 static struct line_header *
7666 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
7667 struct dwarf2_cu *cu)
7669 struct cleanup *back_to;
7670 struct line_header *lh;
7672 unsigned int bytes_read, offset_size;
7674 char *cur_dir, *cur_file;
7676 if (dwarf2_per_objfile->line.buffer == NULL)
7678 complaint (&symfile_complaints, _("missing .debug_line section"));
7682 /* Make sure that at least there's room for the total_length field.
7683 That could be 12 bytes long, but we're just going to fudge that. */
7684 if (offset + 4 >= dwarf2_per_objfile->line.size)
7686 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7690 lh = xmalloc (sizeof (*lh));
7691 memset (lh, 0, sizeof (*lh));
7692 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
7695 line_ptr = dwarf2_per_objfile->line.buffer + offset;
7697 /* Read in the header. */
7699 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
7700 &bytes_read, &offset_size);
7701 line_ptr += bytes_read;
7702 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
7703 + dwarf2_per_objfile->line.size))
7705 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7708 lh->statement_program_end = line_ptr + lh->total_length;
7709 lh->version = read_2_bytes (abfd, line_ptr);
7711 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
7712 line_ptr += offset_size;
7713 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
7715 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
7717 lh->line_base = read_1_signed_byte (abfd, line_ptr);
7719 lh->line_range = read_1_byte (abfd, line_ptr);
7721 lh->opcode_base = read_1_byte (abfd, line_ptr);
7723 lh->standard_opcode_lengths
7724 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
7726 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
7727 for (i = 1; i < lh->opcode_base; ++i)
7729 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
7733 /* Read directory table. */
7734 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7736 line_ptr += bytes_read;
7737 add_include_dir (lh, cur_dir);
7739 line_ptr += bytes_read;
7741 /* Read file name table. */
7742 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7744 unsigned int dir_index, mod_time, length;
7746 line_ptr += bytes_read;
7747 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7748 line_ptr += bytes_read;
7749 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7750 line_ptr += bytes_read;
7751 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7752 line_ptr += bytes_read;
7754 add_file_name (lh, cur_file, dir_index, mod_time, length);
7756 line_ptr += bytes_read;
7757 lh->statement_program_start = line_ptr;
7759 if (line_ptr > (dwarf2_per_objfile->line.buffer
7760 + dwarf2_per_objfile->line.size))
7761 complaint (&symfile_complaints,
7762 _("line number info header doesn't fit in `.debug_line' section"));
7764 discard_cleanups (back_to);
7768 /* This function exists to work around a bug in certain compilers
7769 (particularly GCC 2.95), in which the first line number marker of a
7770 function does not show up until after the prologue, right before
7771 the second line number marker. This function shifts ADDRESS down
7772 to the beginning of the function if necessary, and is called on
7773 addresses passed to record_line. */
7776 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
7778 struct function_range *fn;
7780 /* Find the function_range containing address. */
7785 cu->cached_fn = cu->first_fn;
7789 if (fn->lowpc <= address && fn->highpc > address)
7795 while (fn && fn != cu->cached_fn)
7796 if (fn->lowpc <= address && fn->highpc > address)
7806 if (address != fn->lowpc)
7807 complaint (&symfile_complaints,
7808 _("misplaced first line number at 0x%lx for '%s'"),
7809 (unsigned long) address, fn->name);
7814 /* Decode the Line Number Program (LNP) for the given line_header
7815 structure and CU. The actual information extracted and the type
7816 of structures created from the LNP depends on the value of PST.
7818 1. If PST is NULL, then this procedure uses the data from the program
7819 to create all necessary symbol tables, and their linetables.
7820 The compilation directory of the file is passed in COMP_DIR,
7821 and must not be NULL.
7823 2. If PST is not NULL, this procedure reads the program to determine
7824 the list of files included by the unit represented by PST, and
7825 builds all the associated partial symbol tables. In this case,
7826 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7827 is not used to compute the full name of the symtab, and therefore
7828 omitting it when building the partial symtab does not introduce
7829 the potential for inconsistency - a partial symtab and its associated
7830 symbtab having a different fullname -). */
7833 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
7834 struct dwarf2_cu *cu, struct partial_symtab *pst)
7836 gdb_byte *line_ptr, *extended_end;
7838 unsigned int bytes_read, extended_len;
7839 unsigned char op_code, extended_op, adj_opcode;
7841 struct objfile *objfile = cu->objfile;
7842 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7843 const int decode_for_pst_p = (pst != NULL);
7844 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
7846 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7848 line_ptr = lh->statement_program_start;
7849 line_end = lh->statement_program_end;
7851 /* Read the statement sequences until there's nothing left. */
7852 while (line_ptr < line_end)
7854 /* state machine registers */
7855 CORE_ADDR address = 0;
7856 unsigned int file = 1;
7857 unsigned int line = 1;
7858 unsigned int column = 0;
7859 int is_stmt = lh->default_is_stmt;
7860 int basic_block = 0;
7861 int end_sequence = 0;
7864 if (!decode_for_pst_p && lh->num_file_names >= file)
7866 /* Start a subfile for the current file of the state machine. */
7867 /* lh->include_dirs and lh->file_names are 0-based, but the
7868 directory and file name numbers in the statement program
7870 struct file_entry *fe = &lh->file_names[file - 1];
7874 dir = lh->include_dirs[fe->dir_index - 1];
7876 dwarf2_start_subfile (fe->name, dir, comp_dir);
7879 /* Decode the table. */
7880 while (!end_sequence)
7882 op_code = read_1_byte (abfd, line_ptr);
7884 if (line_ptr > line_end)
7886 dwarf2_debug_line_missing_end_sequence_complaint ();
7890 if (op_code >= lh->opcode_base)
7892 /* Special operand. */
7893 adj_opcode = op_code - lh->opcode_base;
7894 address += (adj_opcode / lh->line_range)
7895 * lh->minimum_instruction_length;
7896 line += lh->line_base + (adj_opcode % lh->line_range);
7897 if (lh->num_file_names < file || file == 0)
7898 dwarf2_debug_line_missing_file_complaint ();
7901 lh->file_names[file - 1].included_p = 1;
7902 if (!decode_for_pst_p && is_stmt)
7904 if (last_subfile != current_subfile)
7906 addr = gdbarch_addr_bits_remove (gdbarch, address);
7908 record_line (last_subfile, 0, addr);
7909 last_subfile = current_subfile;
7911 /* Append row to matrix using current values. */
7912 addr = check_cu_functions (address, cu);
7913 addr = gdbarch_addr_bits_remove (gdbarch, addr);
7914 record_line (current_subfile, line, addr);
7919 else switch (op_code)
7921 case DW_LNS_extended_op:
7922 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7923 line_ptr += bytes_read;
7924 extended_end = line_ptr + extended_len;
7925 extended_op = read_1_byte (abfd, line_ptr);
7927 switch (extended_op)
7929 case DW_LNE_end_sequence:
7932 case DW_LNE_set_address:
7933 address = read_address (abfd, line_ptr, cu, &bytes_read);
7934 line_ptr += bytes_read;
7935 address += baseaddr;
7937 case DW_LNE_define_file:
7940 unsigned int dir_index, mod_time, length;
7942 cur_file = read_string (abfd, line_ptr, &bytes_read);
7943 line_ptr += bytes_read;
7945 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7946 line_ptr += bytes_read;
7948 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7949 line_ptr += bytes_read;
7951 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7952 line_ptr += bytes_read;
7953 add_file_name (lh, cur_file, dir_index, mod_time, length);
7956 case DW_LNE_set_discriminator:
7957 /* The discriminator is not interesting to the debugger;
7959 line_ptr = extended_end;
7962 complaint (&symfile_complaints,
7963 _("mangled .debug_line section"));
7966 /* Make sure that we parsed the extended op correctly. If e.g.
7967 we expected a different address size than the producer used,
7968 we may have read the wrong number of bytes. */
7969 if (line_ptr != extended_end)
7971 complaint (&symfile_complaints,
7972 _("mangled .debug_line section"));
7977 if (lh->num_file_names < file || file == 0)
7978 dwarf2_debug_line_missing_file_complaint ();
7981 lh->file_names[file - 1].included_p = 1;
7982 if (!decode_for_pst_p && is_stmt)
7984 if (last_subfile != current_subfile)
7986 addr = gdbarch_addr_bits_remove (gdbarch, address);
7988 record_line (last_subfile, 0, addr);
7989 last_subfile = current_subfile;
7991 addr = check_cu_functions (address, cu);
7992 addr = gdbarch_addr_bits_remove (gdbarch, addr);
7993 record_line (current_subfile, line, addr);
7998 case DW_LNS_advance_pc:
7999 address += lh->minimum_instruction_length
8000 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8001 line_ptr += bytes_read;
8003 case DW_LNS_advance_line:
8004 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
8005 line_ptr += bytes_read;
8007 case DW_LNS_set_file:
8009 /* The arrays lh->include_dirs and lh->file_names are
8010 0-based, but the directory and file name numbers in
8011 the statement program are 1-based. */
8012 struct file_entry *fe;
8015 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8016 line_ptr += bytes_read;
8017 if (lh->num_file_names < file || file == 0)
8018 dwarf2_debug_line_missing_file_complaint ();
8021 fe = &lh->file_names[file - 1];
8023 dir = lh->include_dirs[fe->dir_index - 1];
8024 if (!decode_for_pst_p)
8026 last_subfile = current_subfile;
8027 dwarf2_start_subfile (fe->name, dir, comp_dir);
8032 case DW_LNS_set_column:
8033 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8034 line_ptr += bytes_read;
8036 case DW_LNS_negate_stmt:
8037 is_stmt = (!is_stmt);
8039 case DW_LNS_set_basic_block:
8042 /* Add to the address register of the state machine the
8043 address increment value corresponding to special opcode
8044 255. I.e., this value is scaled by the minimum
8045 instruction length since special opcode 255 would have
8046 scaled the the increment. */
8047 case DW_LNS_const_add_pc:
8048 address += (lh->minimum_instruction_length
8049 * ((255 - lh->opcode_base) / lh->line_range));
8051 case DW_LNS_fixed_advance_pc:
8052 address += read_2_bytes (abfd, line_ptr);
8057 /* Unknown standard opcode, ignore it. */
8060 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
8062 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8063 line_ptr += bytes_read;
8068 if (lh->num_file_names < file || file == 0)
8069 dwarf2_debug_line_missing_file_complaint ();
8072 lh->file_names[file - 1].included_p = 1;
8073 if (!decode_for_pst_p)
8075 addr = gdbarch_addr_bits_remove (gdbarch, address);
8076 record_line (current_subfile, 0, addr);
8081 if (decode_for_pst_p)
8085 /* Now that we're done scanning the Line Header Program, we can
8086 create the psymtab of each included file. */
8087 for (file_index = 0; file_index < lh->num_file_names; file_index++)
8088 if (lh->file_names[file_index].included_p == 1)
8090 const struct file_entry fe = lh->file_names [file_index];
8091 char *include_name = fe.name;
8092 char *dir_name = NULL;
8093 char *pst_filename = pst->filename;
8096 dir_name = lh->include_dirs[fe.dir_index - 1];
8098 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
8100 include_name = concat (dir_name, SLASH_STRING,
8101 include_name, (char *)NULL);
8102 make_cleanup (xfree, include_name);
8105 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
8107 pst_filename = concat (pst->dirname, SLASH_STRING,
8108 pst_filename, (char *)NULL);
8109 make_cleanup (xfree, pst_filename);
8112 if (strcmp (include_name, pst_filename) != 0)
8113 dwarf2_create_include_psymtab (include_name, pst, objfile);
8118 /* Make sure a symtab is created for every file, even files
8119 which contain only variables (i.e. no code with associated
8123 struct file_entry *fe;
8125 for (i = 0; i < lh->num_file_names; i++)
8128 fe = &lh->file_names[i];
8130 dir = lh->include_dirs[fe->dir_index - 1];
8131 dwarf2_start_subfile (fe->name, dir, comp_dir);
8133 /* Skip the main file; we don't need it, and it must be
8134 allocated last, so that it will show up before the
8135 non-primary symtabs in the objfile's symtab list. */
8136 if (current_subfile == first_subfile)
8139 if (current_subfile->symtab == NULL)
8140 current_subfile->symtab = allocate_symtab (current_subfile->name,
8142 fe->symtab = current_subfile->symtab;
8147 /* Start a subfile for DWARF. FILENAME is the name of the file and
8148 DIRNAME the name of the source directory which contains FILENAME
8149 or NULL if not known. COMP_DIR is the compilation directory for the
8150 linetable's compilation unit or NULL if not known.
8151 This routine tries to keep line numbers from identical absolute and
8152 relative file names in a common subfile.
8154 Using the `list' example from the GDB testsuite, which resides in
8155 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8156 of /srcdir/list0.c yields the following debugging information for list0.c:
8158 DW_AT_name: /srcdir/list0.c
8159 DW_AT_comp_dir: /compdir
8160 files.files[0].name: list0.h
8161 files.files[0].dir: /srcdir
8162 files.files[1].name: list0.c
8163 files.files[1].dir: /srcdir
8165 The line number information for list0.c has to end up in a single
8166 subfile, so that `break /srcdir/list0.c:1' works as expected.
8167 start_subfile will ensure that this happens provided that we pass the
8168 concatenation of files.files[1].dir and files.files[1].name as the
8172 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
8176 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8177 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8178 second argument to start_subfile. To be consistent, we do the
8179 same here. In order not to lose the line information directory,
8180 we concatenate it to the filename when it makes sense.
8181 Note that the Dwarf3 standard says (speaking of filenames in line
8182 information): ``The directory index is ignored for file names
8183 that represent full path names''. Thus ignoring dirname in the
8184 `else' branch below isn't an issue. */
8186 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
8187 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
8189 fullname = filename;
8191 start_subfile (fullname, comp_dir);
8193 if (fullname != filename)
8198 var_decode_location (struct attribute *attr, struct symbol *sym,
8199 struct dwarf2_cu *cu)
8201 struct objfile *objfile = cu->objfile;
8202 struct comp_unit_head *cu_header = &cu->header;
8204 /* NOTE drow/2003-01-30: There used to be a comment and some special
8205 code here to turn a symbol with DW_AT_external and a
8206 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8207 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8208 with some versions of binutils) where shared libraries could have
8209 relocations against symbols in their debug information - the
8210 minimal symbol would have the right address, but the debug info
8211 would not. It's no longer necessary, because we will explicitly
8212 apply relocations when we read in the debug information now. */
8214 /* A DW_AT_location attribute with no contents indicates that a
8215 variable has been optimized away. */
8216 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
8218 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8222 /* Handle one degenerate form of location expression specially, to
8223 preserve GDB's previous behavior when section offsets are
8224 specified. If this is just a DW_OP_addr then mark this symbol
8227 if (attr_form_is_block (attr)
8228 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
8229 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
8233 SYMBOL_VALUE_ADDRESS (sym) =
8234 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
8235 SYMBOL_CLASS (sym) = LOC_STATIC;
8236 fixup_symbol_section (sym, objfile);
8237 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
8238 SYMBOL_SECTION (sym));
8242 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8243 expression evaluator, and use LOC_COMPUTED only when necessary
8244 (i.e. when the value of a register or memory location is
8245 referenced, or a thread-local block, etc.). Then again, it might
8246 not be worthwhile. I'm assuming that it isn't unless performance
8247 or memory numbers show me otherwise. */
8249 dwarf2_symbol_mark_computed (attr, sym, cu);
8250 SYMBOL_CLASS (sym) = LOC_COMPUTED;
8253 /* Given a pointer to a DWARF information entry, figure out if we need
8254 to make a symbol table entry for it, and if so, create a new entry
8255 and return a pointer to it.
8256 If TYPE is NULL, determine symbol type from the die, otherwise
8257 used the passed type. */
8259 static struct symbol *
8260 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
8262 struct objfile *objfile = cu->objfile;
8263 struct symbol *sym = NULL;
8265 struct attribute *attr = NULL;
8266 struct attribute *attr2 = NULL;
8268 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
8270 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8272 if (die->tag != DW_TAG_namespace)
8273 name = dwarf2_linkage_name (die, cu);
8275 name = TYPE_NAME (type);
8279 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
8280 sizeof (struct symbol));
8281 OBJSTAT (objfile, n_syms++);
8282 memset (sym, 0, sizeof (struct symbol));
8284 /* Cache this symbol's name and the name's demangled form (if any). */
8285 SYMBOL_LANGUAGE (sym) = cu->language;
8286 SYMBOL_SET_NAMES (sym, name, strlen (name), objfile);
8288 /* Default assumptions.
8289 Use the passed type or decode it from the die. */
8290 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8291 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8293 SYMBOL_TYPE (sym) = type;
8295 SYMBOL_TYPE (sym) = die_type (die, cu);
8296 attr = dwarf2_attr (die,
8297 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
8301 SYMBOL_LINE (sym) = DW_UNSND (attr);
8304 attr = dwarf2_attr (die,
8305 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
8309 int file_index = DW_UNSND (attr);
8310 if (cu->line_header == NULL
8311 || file_index > cu->line_header->num_file_names)
8312 complaint (&symfile_complaints,
8313 _("file index out of range"));
8314 else if (file_index > 0)
8316 struct file_entry *fe;
8317 fe = &cu->line_header->file_names[file_index - 1];
8318 SYMBOL_SYMTAB (sym) = fe->symtab;
8325 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
8328 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
8330 SYMBOL_CLASS (sym) = LOC_LABEL;
8332 case DW_TAG_subprogram:
8333 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8335 SYMBOL_CLASS (sym) = LOC_BLOCK;
8336 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8337 if ((attr2 && (DW_UNSND (attr2) != 0))
8338 || cu->language == language_ada)
8340 /* Subprograms marked external are stored as a global symbol.
8341 Ada subprograms, whether marked external or not, are always
8342 stored as a global symbol, because we want to be able to
8343 access them globally. For instance, we want to be able
8344 to break on a nested subprogram without having to
8345 specify the context. */
8346 add_symbol_to_list (sym, &global_symbols);
8350 add_symbol_to_list (sym, cu->list_in_scope);
8353 case DW_TAG_inlined_subroutine:
8354 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8356 SYMBOL_CLASS (sym) = LOC_BLOCK;
8357 SYMBOL_INLINED (sym) = 1;
8358 /* Do not add the symbol to any lists. It will be found via
8359 BLOCK_FUNCTION from the blockvector. */
8361 case DW_TAG_variable:
8362 /* Compilation with minimal debug info may result in variables
8363 with missing type entries. Change the misleading `void' type
8364 to something sensible. */
8365 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
8367 = objfile_type (objfile)->nodebug_data_symbol;
8369 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8372 dwarf2_const_value (attr, sym, cu);
8373 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8374 if (attr2 && (DW_UNSND (attr2) != 0))
8375 add_symbol_to_list (sym, &global_symbols);
8377 add_symbol_to_list (sym, cu->list_in_scope);
8380 attr = dwarf2_attr (die, DW_AT_location, cu);
8383 var_decode_location (attr, sym, cu);
8384 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8385 if (attr2 && (DW_UNSND (attr2) != 0))
8386 add_symbol_to_list (sym, &global_symbols);
8388 add_symbol_to_list (sym, cu->list_in_scope);
8392 /* We do not know the address of this symbol.
8393 If it is an external symbol and we have type information
8394 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8395 The address of the variable will then be determined from
8396 the minimal symbol table whenever the variable is
8398 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8399 if (attr2 && (DW_UNSND (attr2) != 0)
8400 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
8402 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8403 add_symbol_to_list (sym, cu->list_in_scope);
8405 else if (!die_is_declaration (die, cu))
8407 /* Use the default LOC_OPTIMIZED_OUT class. */
8408 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
8409 add_symbol_to_list (sym, cu->list_in_scope);
8413 case DW_TAG_formal_parameter:
8414 /* If we are inside a function, mark this as an argument. If
8415 not, we might be looking at an argument to an inlined function
8416 when we do not have enough information to show inlined frames;
8417 pretend it's a local variable in that case so that the user can
8419 if (context_stack_depth > 0
8420 && context_stack[context_stack_depth - 1].name != NULL)
8421 SYMBOL_IS_ARGUMENT (sym) = 1;
8422 attr = dwarf2_attr (die, DW_AT_location, cu);
8425 var_decode_location (attr, sym, cu);
8427 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8430 dwarf2_const_value (attr, sym, cu);
8432 add_symbol_to_list (sym, cu->list_in_scope);
8434 case DW_TAG_unspecified_parameters:
8435 /* From varargs functions; gdb doesn't seem to have any
8436 interest in this information, so just ignore it for now.
8439 case DW_TAG_class_type:
8440 case DW_TAG_interface_type:
8441 case DW_TAG_structure_type:
8442 case DW_TAG_union_type:
8443 case DW_TAG_set_type:
8444 case DW_TAG_enumeration_type:
8445 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8446 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
8448 /* Make sure that the symbol includes appropriate enclosing
8449 classes/namespaces in its name. These are calculated in
8450 read_structure_type, and the correct name is saved in
8453 if (cu->language == language_cplus
8454 || cu->language == language_java)
8456 struct type *type = SYMBOL_TYPE (sym);
8458 if (TYPE_TAG_NAME (type) != NULL)
8460 /* FIXME: carlton/2003-11-10: Should this use
8461 SYMBOL_SET_NAMES instead? (The same problem also
8462 arises further down in this function.) */
8463 /* The type's name is already allocated along with
8464 this objfile, so we don't need to duplicate it
8466 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
8471 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8472 really ever be static objects: otherwise, if you try
8473 to, say, break of a class's method and you're in a file
8474 which doesn't mention that class, it won't work unless
8475 the check for all static symbols in lookup_symbol_aux
8476 saves you. See the OtherFileClass tests in
8477 gdb.c++/namespace.exp. */
8479 struct pending **list_to_add;
8481 list_to_add = (cu->list_in_scope == &file_symbols
8482 && (cu->language == language_cplus
8483 || cu->language == language_java)
8484 ? &global_symbols : cu->list_in_scope);
8486 add_symbol_to_list (sym, list_to_add);
8488 /* The semantics of C++ state that "struct foo { ... }" also
8489 defines a typedef for "foo". A Java class declaration also
8490 defines a typedef for the class. */
8491 if (cu->language == language_cplus
8492 || cu->language == language_java
8493 || cu->language == language_ada)
8495 /* The symbol's name is already allocated along with
8496 this objfile, so we don't need to duplicate it for
8498 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
8499 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
8503 case DW_TAG_typedef:
8504 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8505 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8506 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8507 add_symbol_to_list (sym, cu->list_in_scope);
8509 case DW_TAG_base_type:
8510 case DW_TAG_subrange_type:
8511 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8512 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8513 add_symbol_to_list (sym, cu->list_in_scope);
8515 case DW_TAG_enumerator:
8516 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8517 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8520 dwarf2_const_value (attr, sym, cu);
8523 /* NOTE: carlton/2003-11-10: See comment above in the
8524 DW_TAG_class_type, etc. block. */
8526 struct pending **list_to_add;
8528 list_to_add = (cu->list_in_scope == &file_symbols
8529 && (cu->language == language_cplus
8530 || cu->language == language_java)
8531 ? &global_symbols : cu->list_in_scope);
8533 add_symbol_to_list (sym, list_to_add);
8536 case DW_TAG_namespace:
8537 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8538 add_symbol_to_list (sym, &global_symbols);
8541 /* Not a tag we recognize. Hopefully we aren't processing
8542 trash data, but since we must specifically ignore things
8543 we don't recognize, there is nothing else we should do at
8545 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
8546 dwarf_tag_name (die->tag));
8550 /* For the benefit of old versions of GCC, check for anonymous
8551 namespaces based on the demangled name. */
8552 if (!processing_has_namespace_info
8553 && cu->language == language_cplus
8554 && dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu) != NULL)
8555 cp_scan_for_anonymous_namespaces (sym);
8560 /* Copy constant value from an attribute to a symbol. */
8563 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
8564 struct dwarf2_cu *cu)
8566 struct objfile *objfile = cu->objfile;
8567 struct comp_unit_head *cu_header = &cu->header;
8568 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
8569 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
8570 struct dwarf_block *blk;
8575 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
8576 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8577 cu_header->addr_size,
8578 TYPE_LENGTH (SYMBOL_TYPE
8580 SYMBOL_VALUE_BYTES (sym) =
8581 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
8582 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8583 it's body - store_unsigned_integer. */
8584 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
8585 DW_ADDR (attr), byte_order);
8586 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8588 case DW_FORM_string:
8590 /* DW_STRING is already allocated on the obstack, point directly
8592 SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
8593 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8595 case DW_FORM_block1:
8596 case DW_FORM_block2:
8597 case DW_FORM_block4:
8599 blk = DW_BLOCK (attr);
8600 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
8601 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8603 TYPE_LENGTH (SYMBOL_TYPE
8605 SYMBOL_VALUE_BYTES (sym) =
8606 obstack_alloc (&objfile->objfile_obstack, blk->size);
8607 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
8608 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8611 /* The DW_AT_const_value attributes are supposed to carry the
8612 symbol's value "represented as it would be on the target
8613 architecture." By the time we get here, it's already been
8614 converted to host endianness, so we just need to sign- or
8615 zero-extend it as appropriate. */
8617 dwarf2_const_value_data (attr, sym, 8);
8620 dwarf2_const_value_data (attr, sym, 16);
8623 dwarf2_const_value_data (attr, sym, 32);
8626 dwarf2_const_value_data (attr, sym, 64);
8630 SYMBOL_VALUE (sym) = DW_SND (attr);
8631 SYMBOL_CLASS (sym) = LOC_CONST;
8635 SYMBOL_VALUE (sym) = DW_UNSND (attr);
8636 SYMBOL_CLASS (sym) = LOC_CONST;
8640 complaint (&symfile_complaints,
8641 _("unsupported const value attribute form: '%s'"),
8642 dwarf_form_name (attr->form));
8643 SYMBOL_VALUE (sym) = 0;
8644 SYMBOL_CLASS (sym) = LOC_CONST;
8650 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8651 or zero-extend it as appropriate for the symbol's type. */
8653 dwarf2_const_value_data (struct attribute *attr,
8657 LONGEST l = DW_UNSND (attr);
8659 if (bits < sizeof (l) * 8)
8661 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
8662 l &= ((LONGEST) 1 << bits) - 1;
8664 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
8667 SYMBOL_VALUE (sym) = l;
8668 SYMBOL_CLASS (sym) = LOC_CONST;
8672 /* Return the type of the die in question using its DW_AT_type attribute. */
8674 static struct type *
8675 die_type (struct die_info *die, struct dwarf2_cu *cu)
8678 struct attribute *type_attr;
8679 struct die_info *type_die;
8681 type_attr = dwarf2_attr (die, DW_AT_type, cu);
8684 /* A missing DW_AT_type represents a void type. */
8685 return objfile_type (cu->objfile)->builtin_void;
8688 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8690 type = tag_type_to_type (type_die, cu);
8693 dump_die_for_error (type_die);
8694 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8700 /* Return the containing type of the die in question using its
8701 DW_AT_containing_type attribute. */
8703 static struct type *
8704 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
8706 struct type *type = NULL;
8707 struct attribute *type_attr;
8708 struct die_info *type_die = NULL;
8710 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
8713 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8714 type = tag_type_to_type (type_die, cu);
8719 dump_die_for_error (type_die);
8720 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8726 static struct type *
8727 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
8729 struct type *this_type;
8731 this_type = read_type_die (die, cu);
8734 dump_die_for_error (die);
8735 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8741 static struct type *
8742 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
8744 struct type *this_type;
8746 this_type = get_die_type (die, cu);
8752 case DW_TAG_class_type:
8753 case DW_TAG_interface_type:
8754 case DW_TAG_structure_type:
8755 case DW_TAG_union_type:
8756 this_type = read_structure_type (die, cu);
8758 case DW_TAG_enumeration_type:
8759 this_type = read_enumeration_type (die, cu);
8761 case DW_TAG_subprogram:
8762 case DW_TAG_subroutine_type:
8763 case DW_TAG_inlined_subroutine:
8764 this_type = read_subroutine_type (die, cu);
8766 case DW_TAG_array_type:
8767 this_type = read_array_type (die, cu);
8769 case DW_TAG_set_type:
8770 this_type = read_set_type (die, cu);
8772 case DW_TAG_pointer_type:
8773 this_type = read_tag_pointer_type (die, cu);
8775 case DW_TAG_ptr_to_member_type:
8776 this_type = read_tag_ptr_to_member_type (die, cu);
8778 case DW_TAG_reference_type:
8779 this_type = read_tag_reference_type (die, cu);
8781 case DW_TAG_const_type:
8782 this_type = read_tag_const_type (die, cu);
8784 case DW_TAG_volatile_type:
8785 this_type = read_tag_volatile_type (die, cu);
8787 case DW_TAG_string_type:
8788 this_type = read_tag_string_type (die, cu);
8790 case DW_TAG_typedef:
8791 this_type = read_typedef (die, cu);
8793 case DW_TAG_subrange_type:
8794 this_type = read_subrange_type (die, cu);
8796 case DW_TAG_base_type:
8797 this_type = read_base_type (die, cu);
8799 case DW_TAG_unspecified_type:
8800 this_type = read_unspecified_type (die, cu);
8802 case DW_TAG_namespace:
8803 this_type = read_namespace_type (die, cu);
8806 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
8807 dwarf_tag_name (die->tag));
8814 /* Return the name of the namespace/class that DIE is defined within,
8815 or "" if we can't tell. The caller should not xfree the result.
8817 For example, if we're within the method foo() in the following
8827 then determine_prefix on foo's die will return "N::C". */
8830 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
8832 struct die_info *parent, *spec_die;
8833 struct dwarf2_cu *spec_cu;
8834 struct type *parent_type;
8836 if (cu->language != language_cplus
8837 && cu->language != language_java)
8840 /* We have to be careful in the presence of DW_AT_specification.
8841 For example, with GCC 3.4, given the code
8845 // Definition of N::foo.
8849 then we'll have a tree of DIEs like this:
8851 1: DW_TAG_compile_unit
8852 2: DW_TAG_namespace // N
8853 3: DW_TAG_subprogram // declaration of N::foo
8854 4: DW_TAG_subprogram // definition of N::foo
8855 DW_AT_specification // refers to die #3
8857 Thus, when processing die #4, we have to pretend that we're in
8858 the context of its DW_AT_specification, namely the contex of die
8861 spec_die = die_specification (die, &spec_cu);
8862 if (spec_die == NULL)
8863 parent = die->parent;
8866 parent = spec_die->parent;
8873 switch (parent->tag)
8875 case DW_TAG_namespace:
8876 parent_type = read_type_die (parent, cu);
8877 /* We give a name to even anonymous namespaces. */
8878 return TYPE_TAG_NAME (parent_type);
8879 case DW_TAG_class_type:
8880 case DW_TAG_interface_type:
8881 case DW_TAG_structure_type:
8882 case DW_TAG_union_type:
8883 parent_type = read_type_die (parent, cu);
8884 if (TYPE_TAG_NAME (parent_type) != NULL)
8885 return TYPE_TAG_NAME (parent_type);
8887 /* An anonymous structure is only allowed non-static data
8888 members; no typedefs, no member functions, et cetera.
8889 So it does not need a prefix. */
8892 return determine_prefix (parent, cu);
8896 /* Return a newly-allocated string formed by concatenating PREFIX and
8897 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8898 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8899 perform an obconcat, otherwise allocate storage for the result. The CU argument
8900 is used to determine the language and hence, the appropriate separator. */
8902 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8905 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
8906 struct dwarf2_cu *cu)
8910 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
8912 else if (cu->language == language_java)
8924 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
8925 strcpy (retval, prefix);
8926 strcat (retval, sep);
8927 strcat (retval, suffix);
8932 /* We have an obstack. */
8933 return obconcat (obs, prefix, sep, suffix);
8937 /* Return sibling of die, NULL if no sibling. */
8939 static struct die_info *
8940 sibling_die (struct die_info *die)
8942 return die->sibling;
8945 /* Get linkage name of a die, return NULL if not found. */
8948 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
8950 struct attribute *attr;
8952 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
8953 if (attr && DW_STRING (attr))
8954 return DW_STRING (attr);
8955 return dwarf2_name (die, cu);
8958 /* Get name of a die, return NULL if not found. */
8961 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
8962 struct obstack *obstack)
8964 if (name && cu->language == language_cplus)
8966 char *canon_name = cp_canonicalize_string (name);
8968 if (canon_name != NULL)
8970 if (strcmp (canon_name, name) != 0)
8971 name = obsavestring (canon_name, strlen (canon_name),
8980 /* Get name of a die, return NULL if not found. */
8983 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
8985 struct attribute *attr;
8987 attr = dwarf2_attr (die, DW_AT_name, cu);
8988 if (!attr || !DW_STRING (attr))
8993 case DW_TAG_compile_unit:
8994 /* Compilation units have a DW_AT_name that is a filename, not
8995 a source language identifier. */
8996 case DW_TAG_enumeration_type:
8997 case DW_TAG_enumerator:
8998 /* These tags always have simple identifiers already; no need
8999 to canonicalize them. */
9000 return DW_STRING (attr);
9002 if (attr->form != GDB_FORM_cached_string)
9005 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
9006 &cu->objfile->objfile_obstack);
9007 attr->form = GDB_FORM_cached_string;
9009 return DW_STRING (attr);
9013 /* Return the die that this die in an extension of, or NULL if there
9014 is none. *EXT_CU is the CU containing DIE on input, and the CU
9015 containing the return value on output. */
9017 static struct die_info *
9018 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
9020 struct attribute *attr;
9022 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
9026 return follow_die_ref (die, attr, ext_cu);
9029 /* Convert a DIE tag into its string name. */
9032 dwarf_tag_name (unsigned tag)
9036 case DW_TAG_padding:
9037 return "DW_TAG_padding";
9038 case DW_TAG_array_type:
9039 return "DW_TAG_array_type";
9040 case DW_TAG_class_type:
9041 return "DW_TAG_class_type";
9042 case DW_TAG_entry_point:
9043 return "DW_TAG_entry_point";
9044 case DW_TAG_enumeration_type:
9045 return "DW_TAG_enumeration_type";
9046 case DW_TAG_formal_parameter:
9047 return "DW_TAG_formal_parameter";
9048 case DW_TAG_imported_declaration:
9049 return "DW_TAG_imported_declaration";
9051 return "DW_TAG_label";
9052 case DW_TAG_lexical_block:
9053 return "DW_TAG_lexical_block";
9055 return "DW_TAG_member";
9056 case DW_TAG_pointer_type:
9057 return "DW_TAG_pointer_type";
9058 case DW_TAG_reference_type:
9059 return "DW_TAG_reference_type";
9060 case DW_TAG_compile_unit:
9061 return "DW_TAG_compile_unit";
9062 case DW_TAG_string_type:
9063 return "DW_TAG_string_type";
9064 case DW_TAG_structure_type:
9065 return "DW_TAG_structure_type";
9066 case DW_TAG_subroutine_type:
9067 return "DW_TAG_subroutine_type";
9068 case DW_TAG_typedef:
9069 return "DW_TAG_typedef";
9070 case DW_TAG_union_type:
9071 return "DW_TAG_union_type";
9072 case DW_TAG_unspecified_parameters:
9073 return "DW_TAG_unspecified_parameters";
9074 case DW_TAG_variant:
9075 return "DW_TAG_variant";
9076 case DW_TAG_common_block:
9077 return "DW_TAG_common_block";
9078 case DW_TAG_common_inclusion:
9079 return "DW_TAG_common_inclusion";
9080 case DW_TAG_inheritance:
9081 return "DW_TAG_inheritance";
9082 case DW_TAG_inlined_subroutine:
9083 return "DW_TAG_inlined_subroutine";
9085 return "DW_TAG_module";
9086 case DW_TAG_ptr_to_member_type:
9087 return "DW_TAG_ptr_to_member_type";
9088 case DW_TAG_set_type:
9089 return "DW_TAG_set_type";
9090 case DW_TAG_subrange_type:
9091 return "DW_TAG_subrange_type";
9092 case DW_TAG_with_stmt:
9093 return "DW_TAG_with_stmt";
9094 case DW_TAG_access_declaration:
9095 return "DW_TAG_access_declaration";
9096 case DW_TAG_base_type:
9097 return "DW_TAG_base_type";
9098 case DW_TAG_catch_block:
9099 return "DW_TAG_catch_block";
9100 case DW_TAG_const_type:
9101 return "DW_TAG_const_type";
9102 case DW_TAG_constant:
9103 return "DW_TAG_constant";
9104 case DW_TAG_enumerator:
9105 return "DW_TAG_enumerator";
9106 case DW_TAG_file_type:
9107 return "DW_TAG_file_type";
9109 return "DW_TAG_friend";
9110 case DW_TAG_namelist:
9111 return "DW_TAG_namelist";
9112 case DW_TAG_namelist_item:
9113 return "DW_TAG_namelist_item";
9114 case DW_TAG_packed_type:
9115 return "DW_TAG_packed_type";
9116 case DW_TAG_subprogram:
9117 return "DW_TAG_subprogram";
9118 case DW_TAG_template_type_param:
9119 return "DW_TAG_template_type_param";
9120 case DW_TAG_template_value_param:
9121 return "DW_TAG_template_value_param";
9122 case DW_TAG_thrown_type:
9123 return "DW_TAG_thrown_type";
9124 case DW_TAG_try_block:
9125 return "DW_TAG_try_block";
9126 case DW_TAG_variant_part:
9127 return "DW_TAG_variant_part";
9128 case DW_TAG_variable:
9129 return "DW_TAG_variable";
9130 case DW_TAG_volatile_type:
9131 return "DW_TAG_volatile_type";
9132 case DW_TAG_dwarf_procedure:
9133 return "DW_TAG_dwarf_procedure";
9134 case DW_TAG_restrict_type:
9135 return "DW_TAG_restrict_type";
9136 case DW_TAG_interface_type:
9137 return "DW_TAG_interface_type";
9138 case DW_TAG_namespace:
9139 return "DW_TAG_namespace";
9140 case DW_TAG_imported_module:
9141 return "DW_TAG_imported_module";
9142 case DW_TAG_unspecified_type:
9143 return "DW_TAG_unspecified_type";
9144 case DW_TAG_partial_unit:
9145 return "DW_TAG_partial_unit";
9146 case DW_TAG_imported_unit:
9147 return "DW_TAG_imported_unit";
9148 case DW_TAG_condition:
9149 return "DW_TAG_condition";
9150 case DW_TAG_shared_type:
9151 return "DW_TAG_shared_type";
9152 case DW_TAG_type_unit:
9153 return "DW_TAG_type_unit";
9154 case DW_TAG_MIPS_loop:
9155 return "DW_TAG_MIPS_loop";
9156 case DW_TAG_HP_array_descriptor:
9157 return "DW_TAG_HP_array_descriptor";
9158 case DW_TAG_format_label:
9159 return "DW_TAG_format_label";
9160 case DW_TAG_function_template:
9161 return "DW_TAG_function_template";
9162 case DW_TAG_class_template:
9163 return "DW_TAG_class_template";
9164 case DW_TAG_GNU_BINCL:
9165 return "DW_TAG_GNU_BINCL";
9166 case DW_TAG_GNU_EINCL:
9167 return "DW_TAG_GNU_EINCL";
9168 case DW_TAG_upc_shared_type:
9169 return "DW_TAG_upc_shared_type";
9170 case DW_TAG_upc_strict_type:
9171 return "DW_TAG_upc_strict_type";
9172 case DW_TAG_upc_relaxed_type:
9173 return "DW_TAG_upc_relaxed_type";
9174 case DW_TAG_PGI_kanji_type:
9175 return "DW_TAG_PGI_kanji_type";
9176 case DW_TAG_PGI_interface_block:
9177 return "DW_TAG_PGI_interface_block";
9179 return "DW_TAG_<unknown>";
9183 /* Convert a DWARF attribute code into its string name. */
9186 dwarf_attr_name (unsigned attr)
9191 return "DW_AT_sibling";
9192 case DW_AT_location:
9193 return "DW_AT_location";
9195 return "DW_AT_name";
9196 case DW_AT_ordering:
9197 return "DW_AT_ordering";
9198 case DW_AT_subscr_data:
9199 return "DW_AT_subscr_data";
9200 case DW_AT_byte_size:
9201 return "DW_AT_byte_size";
9202 case DW_AT_bit_offset:
9203 return "DW_AT_bit_offset";
9204 case DW_AT_bit_size:
9205 return "DW_AT_bit_size";
9206 case DW_AT_element_list:
9207 return "DW_AT_element_list";
9208 case DW_AT_stmt_list:
9209 return "DW_AT_stmt_list";
9211 return "DW_AT_low_pc";
9213 return "DW_AT_high_pc";
9214 case DW_AT_language:
9215 return "DW_AT_language";
9217 return "DW_AT_member";
9219 return "DW_AT_discr";
9220 case DW_AT_discr_value:
9221 return "DW_AT_discr_value";
9222 case DW_AT_visibility:
9223 return "DW_AT_visibility";
9225 return "DW_AT_import";
9226 case DW_AT_string_length:
9227 return "DW_AT_string_length";
9228 case DW_AT_common_reference:
9229 return "DW_AT_common_reference";
9230 case DW_AT_comp_dir:
9231 return "DW_AT_comp_dir";
9232 case DW_AT_const_value:
9233 return "DW_AT_const_value";
9234 case DW_AT_containing_type:
9235 return "DW_AT_containing_type";
9236 case DW_AT_default_value:
9237 return "DW_AT_default_value";
9239 return "DW_AT_inline";
9240 case DW_AT_is_optional:
9241 return "DW_AT_is_optional";
9242 case DW_AT_lower_bound:
9243 return "DW_AT_lower_bound";
9244 case DW_AT_producer:
9245 return "DW_AT_producer";
9246 case DW_AT_prototyped:
9247 return "DW_AT_prototyped";
9248 case DW_AT_return_addr:
9249 return "DW_AT_return_addr";
9250 case DW_AT_start_scope:
9251 return "DW_AT_start_scope";
9252 case DW_AT_bit_stride:
9253 return "DW_AT_bit_stride";
9254 case DW_AT_upper_bound:
9255 return "DW_AT_upper_bound";
9256 case DW_AT_abstract_origin:
9257 return "DW_AT_abstract_origin";
9258 case DW_AT_accessibility:
9259 return "DW_AT_accessibility";
9260 case DW_AT_address_class:
9261 return "DW_AT_address_class";
9262 case DW_AT_artificial:
9263 return "DW_AT_artificial";
9264 case DW_AT_base_types:
9265 return "DW_AT_base_types";
9266 case DW_AT_calling_convention:
9267 return "DW_AT_calling_convention";
9269 return "DW_AT_count";
9270 case DW_AT_data_member_location:
9271 return "DW_AT_data_member_location";
9272 case DW_AT_decl_column:
9273 return "DW_AT_decl_column";
9274 case DW_AT_decl_file:
9275 return "DW_AT_decl_file";
9276 case DW_AT_decl_line:
9277 return "DW_AT_decl_line";
9278 case DW_AT_declaration:
9279 return "DW_AT_declaration";
9280 case DW_AT_discr_list:
9281 return "DW_AT_discr_list";
9282 case DW_AT_encoding:
9283 return "DW_AT_encoding";
9284 case DW_AT_external:
9285 return "DW_AT_external";
9286 case DW_AT_frame_base:
9287 return "DW_AT_frame_base";
9289 return "DW_AT_friend";
9290 case DW_AT_identifier_case:
9291 return "DW_AT_identifier_case";
9292 case DW_AT_macro_info:
9293 return "DW_AT_macro_info";
9294 case DW_AT_namelist_items:
9295 return "DW_AT_namelist_items";
9296 case DW_AT_priority:
9297 return "DW_AT_priority";
9299 return "DW_AT_segment";
9300 case DW_AT_specification:
9301 return "DW_AT_specification";
9302 case DW_AT_static_link:
9303 return "DW_AT_static_link";
9305 return "DW_AT_type";
9306 case DW_AT_use_location:
9307 return "DW_AT_use_location";
9308 case DW_AT_variable_parameter:
9309 return "DW_AT_variable_parameter";
9310 case DW_AT_virtuality:
9311 return "DW_AT_virtuality";
9312 case DW_AT_vtable_elem_location:
9313 return "DW_AT_vtable_elem_location";
9314 /* DWARF 3 values. */
9315 case DW_AT_allocated:
9316 return "DW_AT_allocated";
9317 case DW_AT_associated:
9318 return "DW_AT_associated";
9319 case DW_AT_data_location:
9320 return "DW_AT_data_location";
9321 case DW_AT_byte_stride:
9322 return "DW_AT_byte_stride";
9323 case DW_AT_entry_pc:
9324 return "DW_AT_entry_pc";
9325 case DW_AT_use_UTF8:
9326 return "DW_AT_use_UTF8";
9327 case DW_AT_extension:
9328 return "DW_AT_extension";
9330 return "DW_AT_ranges";
9331 case DW_AT_trampoline:
9332 return "DW_AT_trampoline";
9333 case DW_AT_call_column:
9334 return "DW_AT_call_column";
9335 case DW_AT_call_file:
9336 return "DW_AT_call_file";
9337 case DW_AT_call_line:
9338 return "DW_AT_call_line";
9339 case DW_AT_description:
9340 return "DW_AT_description";
9341 case DW_AT_binary_scale:
9342 return "DW_AT_binary_scale";
9343 case DW_AT_decimal_scale:
9344 return "DW_AT_decimal_scale";
9346 return "DW_AT_small";
9347 case DW_AT_decimal_sign:
9348 return "DW_AT_decimal_sign";
9349 case DW_AT_digit_count:
9350 return "DW_AT_digit_count";
9351 case DW_AT_picture_string:
9352 return "DW_AT_picture_string";
9354 return "DW_AT_mutable";
9355 case DW_AT_threads_scaled:
9356 return "DW_AT_threads_scaled";
9357 case DW_AT_explicit:
9358 return "DW_AT_explicit";
9359 case DW_AT_object_pointer:
9360 return "DW_AT_object_pointer";
9361 case DW_AT_endianity:
9362 return "DW_AT_endianity";
9363 case DW_AT_elemental:
9364 return "DW_AT_elemental";
9366 return "DW_AT_pure";
9367 case DW_AT_recursive:
9368 return "DW_AT_recursive";
9369 /* DWARF 4 values. */
9370 case DW_AT_signature:
9371 return "DW_AT_signature";
9372 /* SGI/MIPS extensions. */
9373 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9374 case DW_AT_MIPS_fde:
9375 return "DW_AT_MIPS_fde";
9377 case DW_AT_MIPS_loop_begin:
9378 return "DW_AT_MIPS_loop_begin";
9379 case DW_AT_MIPS_tail_loop_begin:
9380 return "DW_AT_MIPS_tail_loop_begin";
9381 case DW_AT_MIPS_epilog_begin:
9382 return "DW_AT_MIPS_epilog_begin";
9383 case DW_AT_MIPS_loop_unroll_factor:
9384 return "DW_AT_MIPS_loop_unroll_factor";
9385 case DW_AT_MIPS_software_pipeline_depth:
9386 return "DW_AT_MIPS_software_pipeline_depth";
9387 case DW_AT_MIPS_linkage_name:
9388 return "DW_AT_MIPS_linkage_name";
9389 case DW_AT_MIPS_stride:
9390 return "DW_AT_MIPS_stride";
9391 case DW_AT_MIPS_abstract_name:
9392 return "DW_AT_MIPS_abstract_name";
9393 case DW_AT_MIPS_clone_origin:
9394 return "DW_AT_MIPS_clone_origin";
9395 case DW_AT_MIPS_has_inlines:
9396 return "DW_AT_MIPS_has_inlines";
9397 /* HP extensions. */
9398 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9399 case DW_AT_HP_block_index:
9400 return "DW_AT_HP_block_index";
9402 case DW_AT_HP_unmodifiable:
9403 return "DW_AT_HP_unmodifiable";
9404 case DW_AT_HP_actuals_stmt_list:
9405 return "DW_AT_HP_actuals_stmt_list";
9406 case DW_AT_HP_proc_per_section:
9407 return "DW_AT_HP_proc_per_section";
9408 case DW_AT_HP_raw_data_ptr:
9409 return "DW_AT_HP_raw_data_ptr";
9410 case DW_AT_HP_pass_by_reference:
9411 return "DW_AT_HP_pass_by_reference";
9412 case DW_AT_HP_opt_level:
9413 return "DW_AT_HP_opt_level";
9414 case DW_AT_HP_prof_version_id:
9415 return "DW_AT_HP_prof_version_id";
9416 case DW_AT_HP_opt_flags:
9417 return "DW_AT_HP_opt_flags";
9418 case DW_AT_HP_cold_region_low_pc:
9419 return "DW_AT_HP_cold_region_low_pc";
9420 case DW_AT_HP_cold_region_high_pc:
9421 return "DW_AT_HP_cold_region_high_pc";
9422 case DW_AT_HP_all_variables_modifiable:
9423 return "DW_AT_HP_all_variables_modifiable";
9424 case DW_AT_HP_linkage_name:
9425 return "DW_AT_HP_linkage_name";
9426 case DW_AT_HP_prof_flags:
9427 return "DW_AT_HP_prof_flags";
9428 /* GNU extensions. */
9429 case DW_AT_sf_names:
9430 return "DW_AT_sf_names";
9431 case DW_AT_src_info:
9432 return "DW_AT_src_info";
9433 case DW_AT_mac_info:
9434 return "DW_AT_mac_info";
9435 case DW_AT_src_coords:
9436 return "DW_AT_src_coords";
9437 case DW_AT_body_begin:
9438 return "DW_AT_body_begin";
9439 case DW_AT_body_end:
9440 return "DW_AT_body_end";
9441 case DW_AT_GNU_vector:
9442 return "DW_AT_GNU_vector";
9443 /* VMS extensions. */
9444 case DW_AT_VMS_rtnbeg_pd_address:
9445 return "DW_AT_VMS_rtnbeg_pd_address";
9446 /* UPC extension. */
9447 case DW_AT_upc_threads_scaled:
9448 return "DW_AT_upc_threads_scaled";
9449 /* PGI (STMicroelectronics) extensions. */
9450 case DW_AT_PGI_lbase:
9451 return "DW_AT_PGI_lbase";
9452 case DW_AT_PGI_soffset:
9453 return "DW_AT_PGI_soffset";
9454 case DW_AT_PGI_lstride:
9455 return "DW_AT_PGI_lstride";
9457 return "DW_AT_<unknown>";
9461 /* Convert a DWARF value form code into its string name. */
9464 dwarf_form_name (unsigned form)
9469 return "DW_FORM_addr";
9470 case DW_FORM_block2:
9471 return "DW_FORM_block2";
9472 case DW_FORM_block4:
9473 return "DW_FORM_block4";
9475 return "DW_FORM_data2";
9477 return "DW_FORM_data4";
9479 return "DW_FORM_data8";
9480 case DW_FORM_string:
9481 return "DW_FORM_string";
9483 return "DW_FORM_block";
9484 case DW_FORM_block1:
9485 return "DW_FORM_block1";
9487 return "DW_FORM_data1";
9489 return "DW_FORM_flag";
9491 return "DW_FORM_sdata";
9493 return "DW_FORM_strp";
9495 return "DW_FORM_udata";
9496 case DW_FORM_ref_addr:
9497 return "DW_FORM_ref_addr";
9499 return "DW_FORM_ref1";
9501 return "DW_FORM_ref2";
9503 return "DW_FORM_ref4";
9505 return "DW_FORM_ref8";
9506 case DW_FORM_ref_udata:
9507 return "DW_FORM_ref_udata";
9508 case DW_FORM_indirect:
9509 return "DW_FORM_indirect";
9510 case DW_FORM_sec_offset:
9511 return "DW_FORM_sec_offset";
9512 case DW_FORM_exprloc:
9513 return "DW_FORM_exprloc";
9514 case DW_FORM_flag_present:
9515 return "DW_FORM_flag_present";
9517 return "DW_FORM_sig8";
9518 case GDB_FORM_cached_string:
9519 return "GDB_FORM_cached_string";
9521 return "DW_FORM_<unknown>";
9525 /* Convert a DWARF stack opcode into its string name. */
9528 dwarf_stack_op_name (unsigned op)
9533 return "DW_OP_addr";
9535 return "DW_OP_deref";
9537 return "DW_OP_const1u";
9539 return "DW_OP_const1s";
9541 return "DW_OP_const2u";
9543 return "DW_OP_const2s";
9545 return "DW_OP_const4u";
9547 return "DW_OP_const4s";
9549 return "DW_OP_const8u";
9551 return "DW_OP_const8s";
9553 return "DW_OP_constu";
9555 return "DW_OP_consts";
9559 return "DW_OP_drop";
9561 return "DW_OP_over";
9563 return "DW_OP_pick";
9565 return "DW_OP_swap";
9569 return "DW_OP_xderef";
9577 return "DW_OP_minus";
9589 return "DW_OP_plus";
9590 case DW_OP_plus_uconst:
9591 return "DW_OP_plus_uconst";
9597 return "DW_OP_shra";
9615 return "DW_OP_skip";
9617 return "DW_OP_lit0";
9619 return "DW_OP_lit1";
9621 return "DW_OP_lit2";
9623 return "DW_OP_lit3";
9625 return "DW_OP_lit4";
9627 return "DW_OP_lit5";
9629 return "DW_OP_lit6";
9631 return "DW_OP_lit7";
9633 return "DW_OP_lit8";
9635 return "DW_OP_lit9";
9637 return "DW_OP_lit10";
9639 return "DW_OP_lit11";
9641 return "DW_OP_lit12";
9643 return "DW_OP_lit13";
9645 return "DW_OP_lit14";
9647 return "DW_OP_lit15";
9649 return "DW_OP_lit16";
9651 return "DW_OP_lit17";
9653 return "DW_OP_lit18";
9655 return "DW_OP_lit19";
9657 return "DW_OP_lit20";
9659 return "DW_OP_lit21";
9661 return "DW_OP_lit22";
9663 return "DW_OP_lit23";
9665 return "DW_OP_lit24";
9667 return "DW_OP_lit25";
9669 return "DW_OP_lit26";
9671 return "DW_OP_lit27";
9673 return "DW_OP_lit28";
9675 return "DW_OP_lit29";
9677 return "DW_OP_lit30";
9679 return "DW_OP_lit31";
9681 return "DW_OP_reg0";
9683 return "DW_OP_reg1";
9685 return "DW_OP_reg2";
9687 return "DW_OP_reg3";
9689 return "DW_OP_reg4";
9691 return "DW_OP_reg5";
9693 return "DW_OP_reg6";
9695 return "DW_OP_reg7";
9697 return "DW_OP_reg8";
9699 return "DW_OP_reg9";
9701 return "DW_OP_reg10";
9703 return "DW_OP_reg11";
9705 return "DW_OP_reg12";
9707 return "DW_OP_reg13";
9709 return "DW_OP_reg14";
9711 return "DW_OP_reg15";
9713 return "DW_OP_reg16";
9715 return "DW_OP_reg17";
9717 return "DW_OP_reg18";
9719 return "DW_OP_reg19";
9721 return "DW_OP_reg20";
9723 return "DW_OP_reg21";
9725 return "DW_OP_reg22";
9727 return "DW_OP_reg23";
9729 return "DW_OP_reg24";
9731 return "DW_OP_reg25";
9733 return "DW_OP_reg26";
9735 return "DW_OP_reg27";
9737 return "DW_OP_reg28";
9739 return "DW_OP_reg29";
9741 return "DW_OP_reg30";
9743 return "DW_OP_reg31";
9745 return "DW_OP_breg0";
9747 return "DW_OP_breg1";
9749 return "DW_OP_breg2";
9751 return "DW_OP_breg3";
9753 return "DW_OP_breg4";
9755 return "DW_OP_breg5";
9757 return "DW_OP_breg6";
9759 return "DW_OP_breg7";
9761 return "DW_OP_breg8";
9763 return "DW_OP_breg9";
9765 return "DW_OP_breg10";
9767 return "DW_OP_breg11";
9769 return "DW_OP_breg12";
9771 return "DW_OP_breg13";
9773 return "DW_OP_breg14";
9775 return "DW_OP_breg15";
9777 return "DW_OP_breg16";
9779 return "DW_OP_breg17";
9781 return "DW_OP_breg18";
9783 return "DW_OP_breg19";
9785 return "DW_OP_breg20";
9787 return "DW_OP_breg21";
9789 return "DW_OP_breg22";
9791 return "DW_OP_breg23";
9793 return "DW_OP_breg24";
9795 return "DW_OP_breg25";
9797 return "DW_OP_breg26";
9799 return "DW_OP_breg27";
9801 return "DW_OP_breg28";
9803 return "DW_OP_breg29";
9805 return "DW_OP_breg30";
9807 return "DW_OP_breg31";
9809 return "DW_OP_regx";
9811 return "DW_OP_fbreg";
9813 return "DW_OP_bregx";
9815 return "DW_OP_piece";
9816 case DW_OP_deref_size:
9817 return "DW_OP_deref_size";
9818 case DW_OP_xderef_size:
9819 return "DW_OP_xderef_size";
9822 /* DWARF 3 extensions. */
9823 case DW_OP_push_object_address:
9824 return "DW_OP_push_object_address";
9826 return "DW_OP_call2";
9828 return "DW_OP_call4";
9829 case DW_OP_call_ref:
9830 return "DW_OP_call_ref";
9831 /* GNU extensions. */
9832 case DW_OP_form_tls_address:
9833 return "DW_OP_form_tls_address";
9834 case DW_OP_call_frame_cfa:
9835 return "DW_OP_call_frame_cfa";
9836 case DW_OP_bit_piece:
9837 return "DW_OP_bit_piece";
9838 case DW_OP_GNU_push_tls_address:
9839 return "DW_OP_GNU_push_tls_address";
9840 case DW_OP_GNU_uninit:
9841 return "DW_OP_GNU_uninit";
9842 /* HP extensions. */
9843 case DW_OP_HP_is_value:
9844 return "DW_OP_HP_is_value";
9845 case DW_OP_HP_fltconst4:
9846 return "DW_OP_HP_fltconst4";
9847 case DW_OP_HP_fltconst8:
9848 return "DW_OP_HP_fltconst8";
9849 case DW_OP_HP_mod_range:
9850 return "DW_OP_HP_mod_range";
9851 case DW_OP_HP_unmod_range:
9852 return "DW_OP_HP_unmod_range";
9854 return "DW_OP_HP_tls";
9856 return "OP_<unknown>";
9861 dwarf_bool_name (unsigned mybool)
9869 /* Convert a DWARF type code into its string name. */
9872 dwarf_type_encoding_name (unsigned enc)
9877 return "DW_ATE_void";
9878 case DW_ATE_address:
9879 return "DW_ATE_address";
9880 case DW_ATE_boolean:
9881 return "DW_ATE_boolean";
9882 case DW_ATE_complex_float:
9883 return "DW_ATE_complex_float";
9885 return "DW_ATE_float";
9887 return "DW_ATE_signed";
9888 case DW_ATE_signed_char:
9889 return "DW_ATE_signed_char";
9890 case DW_ATE_unsigned:
9891 return "DW_ATE_unsigned";
9892 case DW_ATE_unsigned_char:
9893 return "DW_ATE_unsigned_char";
9895 case DW_ATE_imaginary_float:
9896 return "DW_ATE_imaginary_float";
9897 case DW_ATE_packed_decimal:
9898 return "DW_ATE_packed_decimal";
9899 case DW_ATE_numeric_string:
9900 return "DW_ATE_numeric_string";
9902 return "DW_ATE_edited";
9903 case DW_ATE_signed_fixed:
9904 return "DW_ATE_signed_fixed";
9905 case DW_ATE_unsigned_fixed:
9906 return "DW_ATE_unsigned_fixed";
9907 case DW_ATE_decimal_float:
9908 return "DW_ATE_decimal_float";
9909 /* HP extensions. */
9910 case DW_ATE_HP_float80:
9911 return "DW_ATE_HP_float80";
9912 case DW_ATE_HP_complex_float80:
9913 return "DW_ATE_HP_complex_float80";
9914 case DW_ATE_HP_float128:
9915 return "DW_ATE_HP_float128";
9916 case DW_ATE_HP_complex_float128:
9917 return "DW_ATE_HP_complex_float128";
9918 case DW_ATE_HP_floathpintel:
9919 return "DW_ATE_HP_floathpintel";
9920 case DW_ATE_HP_imaginary_float80:
9921 return "DW_ATE_HP_imaginary_float80";
9922 case DW_ATE_HP_imaginary_float128:
9923 return "DW_ATE_HP_imaginary_float128";
9925 return "DW_ATE_<unknown>";
9929 /* Convert a DWARF call frame info operation to its string name. */
9933 dwarf_cfi_name (unsigned cfi_opc)
9937 case DW_CFA_advance_loc:
9938 return "DW_CFA_advance_loc";
9940 return "DW_CFA_offset";
9941 case DW_CFA_restore:
9942 return "DW_CFA_restore";
9944 return "DW_CFA_nop";
9945 case DW_CFA_set_loc:
9946 return "DW_CFA_set_loc";
9947 case DW_CFA_advance_loc1:
9948 return "DW_CFA_advance_loc1";
9949 case DW_CFA_advance_loc2:
9950 return "DW_CFA_advance_loc2";
9951 case DW_CFA_advance_loc4:
9952 return "DW_CFA_advance_loc4";
9953 case DW_CFA_offset_extended:
9954 return "DW_CFA_offset_extended";
9955 case DW_CFA_restore_extended:
9956 return "DW_CFA_restore_extended";
9957 case DW_CFA_undefined:
9958 return "DW_CFA_undefined";
9959 case DW_CFA_same_value:
9960 return "DW_CFA_same_value";
9961 case DW_CFA_register:
9962 return "DW_CFA_register";
9963 case DW_CFA_remember_state:
9964 return "DW_CFA_remember_state";
9965 case DW_CFA_restore_state:
9966 return "DW_CFA_restore_state";
9967 case DW_CFA_def_cfa:
9968 return "DW_CFA_def_cfa";
9969 case DW_CFA_def_cfa_register:
9970 return "DW_CFA_def_cfa_register";
9971 case DW_CFA_def_cfa_offset:
9972 return "DW_CFA_def_cfa_offset";
9974 case DW_CFA_def_cfa_expression:
9975 return "DW_CFA_def_cfa_expression";
9976 case DW_CFA_expression:
9977 return "DW_CFA_expression";
9978 case DW_CFA_offset_extended_sf:
9979 return "DW_CFA_offset_extended_sf";
9980 case DW_CFA_def_cfa_sf:
9981 return "DW_CFA_def_cfa_sf";
9982 case DW_CFA_def_cfa_offset_sf:
9983 return "DW_CFA_def_cfa_offset_sf";
9984 case DW_CFA_val_offset:
9985 return "DW_CFA_val_offset";
9986 case DW_CFA_val_offset_sf:
9987 return "DW_CFA_val_offset_sf";
9988 case DW_CFA_val_expression:
9989 return "DW_CFA_val_expression";
9990 /* SGI/MIPS specific. */
9991 case DW_CFA_MIPS_advance_loc8:
9992 return "DW_CFA_MIPS_advance_loc8";
9993 /* GNU extensions. */
9994 case DW_CFA_GNU_window_save:
9995 return "DW_CFA_GNU_window_save";
9996 case DW_CFA_GNU_args_size:
9997 return "DW_CFA_GNU_args_size";
9998 case DW_CFA_GNU_negative_offset_extended:
9999 return "DW_CFA_GNU_negative_offset_extended";
10001 return "DW_CFA_<unknown>";
10007 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
10011 print_spaces (indent, f);
10012 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
10013 dwarf_tag_name (die->tag), die->abbrev, die->offset);
10015 if (die->parent != NULL)
10017 print_spaces (indent, f);
10018 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
10019 die->parent->offset);
10022 print_spaces (indent, f);
10023 fprintf_unfiltered (f, " has children: %s\n",
10024 dwarf_bool_name (die->child != NULL));
10026 print_spaces (indent, f);
10027 fprintf_unfiltered (f, " attributes:\n");
10029 for (i = 0; i < die->num_attrs; ++i)
10031 print_spaces (indent, f);
10032 fprintf_unfiltered (f, " %s (%s) ",
10033 dwarf_attr_name (die->attrs[i].name),
10034 dwarf_form_name (die->attrs[i].form));
10036 switch (die->attrs[i].form)
10038 case DW_FORM_ref_addr:
10040 fprintf_unfiltered (f, "address: ");
10041 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
10043 case DW_FORM_block2:
10044 case DW_FORM_block4:
10045 case DW_FORM_block:
10046 case DW_FORM_block1:
10047 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
10052 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
10053 (long) (DW_ADDR (&die->attrs[i])));
10055 case DW_FORM_data1:
10056 case DW_FORM_data2:
10057 case DW_FORM_data4:
10058 case DW_FORM_data8:
10059 case DW_FORM_udata:
10060 case DW_FORM_sdata:
10061 fprintf_unfiltered (f, "constant: %ld", DW_UNSND (&die->attrs[i]));
10064 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
10065 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
10066 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
10068 fprintf_unfiltered (f, "signatured type, offset: unknown");
10070 case DW_FORM_string:
10072 case GDB_FORM_cached_string:
10073 fprintf_unfiltered (f, "string: \"%s\"",
10074 DW_STRING (&die->attrs[i])
10075 ? DW_STRING (&die->attrs[i]) : "");
10078 if (DW_UNSND (&die->attrs[i]))
10079 fprintf_unfiltered (f, "flag: TRUE");
10081 fprintf_unfiltered (f, "flag: FALSE");
10083 case DW_FORM_indirect:
10084 /* the reader will have reduced the indirect form to
10085 the "base form" so this form should not occur */
10086 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
10089 fprintf_unfiltered (f, "unsupported attribute form: %d.",
10090 die->attrs[i].form);
10093 fprintf_unfiltered (f, "\n");
10098 dump_die_for_error (struct die_info *die)
10100 dump_die_shallow (gdb_stderr, 0, die);
10104 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
10106 int indent = level * 4;
10108 gdb_assert (die != NULL);
10110 if (level >= max_level)
10113 dump_die_shallow (f, indent, die);
10115 if (die->child != NULL)
10117 print_spaces (indent, f);
10118 fprintf_unfiltered (f, " Children:");
10119 if (level + 1 < max_level)
10121 fprintf_unfiltered (f, "\n");
10122 dump_die_1 (f, level + 1, max_level, die->child);
10126 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
10130 if (die->sibling != NULL && level > 0)
10132 dump_die_1 (f, level, max_level, die->sibling);
10136 /* This is called from the pdie macro in gdbinit.in.
10137 It's not static so gcc will keep a copy callable from gdb. */
10140 dump_die (struct die_info *die, int max_level)
10142 dump_die_1 (gdb_stdlog, 0, max_level, die);
10146 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
10150 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
10156 is_ref_attr (struct attribute *attr)
10158 switch (attr->form)
10160 case DW_FORM_ref_addr:
10165 case DW_FORM_ref_udata:
10172 static unsigned int
10173 dwarf2_get_ref_die_offset (struct attribute *attr)
10175 if (is_ref_attr (attr))
10176 return DW_ADDR (attr);
10178 complaint (&symfile_complaints,
10179 _("unsupported die ref attribute form: '%s'"),
10180 dwarf_form_name (attr->form));
10184 /* Return the constant value held by the given attribute. Return -1
10185 if the value held by the attribute is not constant. */
10188 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
10190 if (attr->form == DW_FORM_sdata)
10191 return DW_SND (attr);
10192 else if (attr->form == DW_FORM_udata
10193 || attr->form == DW_FORM_data1
10194 || attr->form == DW_FORM_data2
10195 || attr->form == DW_FORM_data4
10196 || attr->form == DW_FORM_data8)
10197 return DW_UNSND (attr);
10200 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
10201 dwarf_form_name (attr->form));
10202 return default_value;
10206 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10207 unit and add it to our queue.
10208 The result is non-zero if PER_CU was queued, otherwise the result is zero
10209 meaning either PER_CU is already queued or it is already loaded. */
10212 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
10213 struct dwarf2_per_cu_data *per_cu)
10215 /* Mark the dependence relation so that we don't flush PER_CU
10217 dwarf2_add_dependence (this_cu, per_cu);
10219 /* If it's already on the queue, we have nothing to do. */
10220 if (per_cu->queued)
10223 /* If the compilation unit is already loaded, just mark it as
10225 if (per_cu->cu != NULL)
10227 per_cu->cu->last_used = 0;
10231 /* Add it to the queue. */
10232 queue_comp_unit (per_cu, this_cu->objfile);
10237 /* Follow reference or signature attribute ATTR of SRC_DIE.
10238 On entry *REF_CU is the CU of SRC_DIE.
10239 On exit *REF_CU is the CU of the result. */
10241 static struct die_info *
10242 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
10243 struct dwarf2_cu **ref_cu)
10245 struct die_info *die;
10247 if (is_ref_attr (attr))
10248 die = follow_die_ref (src_die, attr, ref_cu);
10249 else if (attr->form == DW_FORM_sig8)
10250 die = follow_die_sig (src_die, attr, ref_cu);
10253 dump_die_for_error (src_die);
10254 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10255 (*ref_cu)->objfile->name);
10261 /* Follow reference attribute ATTR of SRC_DIE.
10262 On entry *REF_CU is the CU of SRC_DIE.
10263 On exit *REF_CU is the CU of the result. */
10265 static struct die_info *
10266 follow_die_ref (struct die_info *src_die, struct attribute *attr,
10267 struct dwarf2_cu **ref_cu)
10269 struct die_info *die;
10270 unsigned int offset;
10271 struct die_info temp_die;
10272 struct dwarf2_cu *target_cu, *cu = *ref_cu;
10274 gdb_assert (cu->per_cu != NULL);
10276 offset = dwarf2_get_ref_die_offset (attr);
10278 if (cu->per_cu->from_debug_types)
10280 /* .debug_types CUs cannot reference anything outside their CU.
10281 If they need to, they have to reference a signatured type via
10283 if (! offset_in_cu_p (&cu->header, offset))
10287 else if (! offset_in_cu_p (&cu->header, offset))
10289 struct dwarf2_per_cu_data *per_cu;
10290 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
10292 /* If necessary, add it to the queue and load its DIEs. */
10293 if (maybe_queue_comp_unit (cu, per_cu))
10294 load_full_comp_unit (per_cu, cu->objfile);
10296 target_cu = per_cu->cu;
10301 *ref_cu = target_cu;
10302 temp_die.offset = offset;
10303 die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
10309 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10310 "at 0x%x [in module %s]"),
10311 offset, src_die->offset, cu->objfile->name);
10314 /* Follow the signature attribute ATTR in SRC_DIE.
10315 On entry *REF_CU is the CU of SRC_DIE.
10316 On exit *REF_CU is the CU of the result. */
10318 static struct die_info *
10319 follow_die_sig (struct die_info *src_die, struct attribute *attr,
10320 struct dwarf2_cu **ref_cu)
10322 struct objfile *objfile = (*ref_cu)->objfile;
10323 struct die_info temp_die;
10324 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
10325 struct dwarf2_cu *sig_cu;
10326 struct die_info *die;
10328 /* sig_type will be NULL if the signatured type is missing from
10330 if (sig_type == NULL)
10331 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10332 "at 0x%x [in module %s]"),
10333 src_die->offset, objfile->name);
10335 /* If necessary, add it to the queue and load its DIEs. */
10337 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
10338 read_signatured_type (objfile, sig_type);
10340 gdb_assert (sig_type->per_cu.cu != NULL);
10342 sig_cu = sig_type->per_cu.cu;
10343 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
10344 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
10351 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10352 "at 0x%x [in module %s]"),
10353 sig_type->type_offset, src_die->offset, objfile->name);
10356 /* Given an offset of a signatured type, return its signatured_type. */
10358 static struct signatured_type *
10359 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
10361 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
10362 unsigned int length, initial_length_size;
10363 unsigned int sig_offset;
10364 struct signatured_type find_entry, *type_sig;
10366 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
10367 sig_offset = (initial_length_size
10369 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
10370 + 1 /*address_size*/);
10371 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
10372 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
10374 /* This is only used to lookup previously recorded types.
10375 If we didn't find it, it's our bug. */
10376 gdb_assert (type_sig != NULL);
10377 gdb_assert (offset == type_sig->offset);
10382 /* Read in signatured type at OFFSET and build its CU and die(s). */
10385 read_signatured_type_at_offset (struct objfile *objfile,
10386 unsigned int offset)
10388 struct signatured_type *type_sig;
10390 /* We have the section offset, but we need the signature to do the
10391 hash table lookup. */
10392 type_sig = lookup_signatured_type_at_offset (objfile, offset);
10394 gdb_assert (type_sig->per_cu.cu == NULL);
10396 read_signatured_type (objfile, type_sig);
10398 gdb_assert (type_sig->per_cu.cu != NULL);
10401 /* Read in a signatured type and build its CU and DIEs. */
10404 read_signatured_type (struct objfile *objfile,
10405 struct signatured_type *type_sig)
10407 gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
10408 struct die_reader_specs reader_specs;
10409 struct dwarf2_cu *cu;
10410 ULONGEST signature;
10411 struct cleanup *back_to, *free_cu_cleanup;
10412 struct attribute *attr;
10414 gdb_assert (type_sig->per_cu.cu == NULL);
10416 cu = xmalloc (sizeof (struct dwarf2_cu));
10417 memset (cu, 0, sizeof (struct dwarf2_cu));
10418 obstack_init (&cu->comp_unit_obstack);
10419 cu->objfile = objfile;
10420 type_sig->per_cu.cu = cu;
10421 cu->per_cu = &type_sig->per_cu;
10423 /* If an error occurs while loading, release our storage. */
10424 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
10426 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
10427 types_ptr, objfile->obfd);
10428 gdb_assert (signature == type_sig->signature);
10431 = htab_create_alloc_ex (cu->header.length / 12,
10435 &cu->comp_unit_obstack,
10436 hashtab_obstack_allocate,
10437 dummy_obstack_deallocate);
10439 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
10440 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
10442 init_cu_die_reader (&reader_specs, cu);
10444 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
10447 /* We try not to read any attributes in this function, because not
10448 all objfiles needed for references have been loaded yet, and symbol
10449 table processing isn't initialized. But we have to set the CU language,
10450 or we won't be able to build types correctly. */
10451 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
10453 set_cu_language (DW_UNSND (attr), cu);
10455 set_cu_language (language_minimal, cu);
10457 do_cleanups (back_to);
10459 /* We've successfully allocated this compilation unit. Let our caller
10460 clean it up when finished with it. */
10461 discard_cleanups (free_cu_cleanup);
10463 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
10464 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
10467 /* Decode simple location descriptions.
10468 Given a pointer to a dwarf block that defines a location, compute
10469 the location and return the value.
10471 NOTE drow/2003-11-18: This function is called in two situations
10472 now: for the address of static or global variables (partial symbols
10473 only) and for offsets into structures which are expected to be
10474 (more or less) constant. The partial symbol case should go away,
10475 and only the constant case should remain. That will let this
10476 function complain more accurately. A few special modes are allowed
10477 without complaint for global variables (for instance, global
10478 register values and thread-local values).
10480 A location description containing no operations indicates that the
10481 object is optimized out. The return value is 0 for that case.
10482 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10483 callers will only want a very basic result and this can become a
10486 Note that stack[0] is unused except as a default error return.
10487 Note that stack overflow is not yet handled. */
10490 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
10492 struct objfile *objfile = cu->objfile;
10493 struct comp_unit_head *cu_header = &cu->header;
10495 int size = blk->size;
10496 gdb_byte *data = blk->data;
10497 CORE_ADDR stack[64];
10499 unsigned int bytes_read, unsnd;
10543 stack[++stacki] = op - DW_OP_lit0;
10578 stack[++stacki] = op - DW_OP_reg0;
10580 dwarf2_complex_location_expr_complaint ();
10584 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10586 stack[++stacki] = unsnd;
10588 dwarf2_complex_location_expr_complaint ();
10592 stack[++stacki] = read_address (objfile->obfd, &data[i],
10597 case DW_OP_const1u:
10598 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
10602 case DW_OP_const1s:
10603 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
10607 case DW_OP_const2u:
10608 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
10612 case DW_OP_const2s:
10613 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
10617 case DW_OP_const4u:
10618 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
10622 case DW_OP_const4s:
10623 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
10628 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
10634 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
10639 stack[stacki + 1] = stack[stacki];
10644 stack[stacki - 1] += stack[stacki];
10648 case DW_OP_plus_uconst:
10649 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10654 stack[stacki - 1] -= stack[stacki];
10659 /* If we're not the last op, then we definitely can't encode
10660 this using GDB's address_class enum. This is valid for partial
10661 global symbols, although the variable's address will be bogus
10664 dwarf2_complex_location_expr_complaint ();
10667 case DW_OP_GNU_push_tls_address:
10668 /* The top of the stack has the offset from the beginning
10669 of the thread control block at which the variable is located. */
10670 /* Nothing should follow this operator, so the top of stack would
10672 /* This is valid for partial global symbols, but the variable's
10673 address will be bogus in the psymtab. */
10675 dwarf2_complex_location_expr_complaint ();
10678 case DW_OP_GNU_uninit:
10682 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
10683 dwarf_stack_op_name (op));
10684 return (stack[stacki]);
10687 return (stack[stacki]);
10690 /* memory allocation interface */
10692 static struct dwarf_block *
10693 dwarf_alloc_block (struct dwarf2_cu *cu)
10695 struct dwarf_block *blk;
10697 blk = (struct dwarf_block *)
10698 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
10702 static struct abbrev_info *
10703 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
10705 struct abbrev_info *abbrev;
10707 abbrev = (struct abbrev_info *)
10708 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
10709 memset (abbrev, 0, sizeof (struct abbrev_info));
10713 static struct die_info *
10714 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
10716 struct die_info *die;
10717 size_t size = sizeof (struct die_info);
10720 size += (num_attrs - 1) * sizeof (struct attribute);
10722 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
10723 memset (die, 0, sizeof (struct die_info));
10728 /* Macro support. */
10731 /* Return the full name of file number I in *LH's file name table.
10732 Use COMP_DIR as the name of the current directory of the
10733 compilation. The result is allocated using xmalloc; the caller is
10734 responsible for freeing it. */
10736 file_full_name (int file, struct line_header *lh, const char *comp_dir)
10738 /* Is the file number a valid index into the line header's file name
10739 table? Remember that file numbers start with one, not zero. */
10740 if (1 <= file && file <= lh->num_file_names)
10742 struct file_entry *fe = &lh->file_names[file - 1];
10744 if (IS_ABSOLUTE_PATH (fe->name))
10745 return xstrdup (fe->name);
10753 dir = lh->include_dirs[fe->dir_index - 1];
10759 dir_len = strlen (dir);
10760 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
10761 strcpy (full_name, dir);
10762 full_name[dir_len] = '/';
10763 strcpy (full_name + dir_len + 1, fe->name);
10767 return xstrdup (fe->name);
10772 /* The compiler produced a bogus file number. We can at least
10773 record the macro definitions made in the file, even if we
10774 won't be able to find the file by name. */
10775 char fake_name[80];
10776 sprintf (fake_name, "<bad macro file number %d>", file);
10778 complaint (&symfile_complaints,
10779 _("bad file number in macro information (%d)"),
10782 return xstrdup (fake_name);
10787 static struct macro_source_file *
10788 macro_start_file (int file, int line,
10789 struct macro_source_file *current_file,
10790 const char *comp_dir,
10791 struct line_header *lh, struct objfile *objfile)
10793 /* The full name of this source file. */
10794 char *full_name = file_full_name (file, lh, comp_dir);
10796 /* We don't create a macro table for this compilation unit
10797 at all until we actually get a filename. */
10798 if (! pending_macros)
10799 pending_macros = new_macro_table (&objfile->objfile_obstack,
10800 objfile->macro_cache);
10802 if (! current_file)
10803 /* If we have no current file, then this must be the start_file
10804 directive for the compilation unit's main source file. */
10805 current_file = macro_set_main (pending_macros, full_name);
10807 current_file = macro_include (current_file, line, full_name);
10811 return current_file;
10815 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10816 followed by a null byte. */
10818 copy_string (const char *buf, int len)
10820 char *s = xmalloc (len + 1);
10821 memcpy (s, buf, len);
10828 static const char *
10829 consume_improper_spaces (const char *p, const char *body)
10833 complaint (&symfile_complaints,
10834 _("macro definition contains spaces in formal argument list:\n`%s'"),
10846 parse_macro_definition (struct macro_source_file *file, int line,
10851 /* The body string takes one of two forms. For object-like macro
10852 definitions, it should be:
10854 <macro name> " " <definition>
10856 For function-like macro definitions, it should be:
10858 <macro name> "() " <definition>
10860 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10862 Spaces may appear only where explicitly indicated, and in the
10865 The Dwarf 2 spec says that an object-like macro's name is always
10866 followed by a space, but versions of GCC around March 2002 omit
10867 the space when the macro's definition is the empty string.
10869 The Dwarf 2 spec says that there should be no spaces between the
10870 formal arguments in a function-like macro's formal argument list,
10871 but versions of GCC around March 2002 include spaces after the
10875 /* Find the extent of the macro name. The macro name is terminated
10876 by either a space or null character (for an object-like macro) or
10877 an opening paren (for a function-like macro). */
10878 for (p = body; *p; p++)
10879 if (*p == ' ' || *p == '(')
10882 if (*p == ' ' || *p == '\0')
10884 /* It's an object-like macro. */
10885 int name_len = p - body;
10886 char *name = copy_string (body, name_len);
10887 const char *replacement;
10890 replacement = body + name_len + 1;
10893 dwarf2_macro_malformed_definition_complaint (body);
10894 replacement = body + name_len;
10897 macro_define_object (file, line, name, replacement);
10901 else if (*p == '(')
10903 /* It's a function-like macro. */
10904 char *name = copy_string (body, p - body);
10907 char **argv = xmalloc (argv_size * sizeof (*argv));
10911 p = consume_improper_spaces (p, body);
10913 /* Parse the formal argument list. */
10914 while (*p && *p != ')')
10916 /* Find the extent of the current argument name. */
10917 const char *arg_start = p;
10919 while (*p && *p != ',' && *p != ')' && *p != ' ')
10922 if (! *p || p == arg_start)
10923 dwarf2_macro_malformed_definition_complaint (body);
10926 /* Make sure argv has room for the new argument. */
10927 if (argc >= argv_size)
10930 argv = xrealloc (argv, argv_size * sizeof (*argv));
10933 argv[argc++] = copy_string (arg_start, p - arg_start);
10936 p = consume_improper_spaces (p, body);
10938 /* Consume the comma, if present. */
10943 p = consume_improper_spaces (p, body);
10952 /* Perfectly formed definition, no complaints. */
10953 macro_define_function (file, line, name,
10954 argc, (const char **) argv,
10956 else if (*p == '\0')
10958 /* Complain, but do define it. */
10959 dwarf2_macro_malformed_definition_complaint (body);
10960 macro_define_function (file, line, name,
10961 argc, (const char **) argv,
10965 /* Just complain. */
10966 dwarf2_macro_malformed_definition_complaint (body);
10969 /* Just complain. */
10970 dwarf2_macro_malformed_definition_complaint (body);
10976 for (i = 0; i < argc; i++)
10982 dwarf2_macro_malformed_definition_complaint (body);
10987 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
10988 char *comp_dir, bfd *abfd,
10989 struct dwarf2_cu *cu)
10991 gdb_byte *mac_ptr, *mac_end;
10992 struct macro_source_file *current_file = 0;
10993 enum dwarf_macinfo_record_type macinfo_type;
10994 int at_commandline;
10996 if (dwarf2_per_objfile->macinfo.buffer == NULL)
10998 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
11002 /* First pass: Find the name of the base filename.
11003 This filename is needed in order to process all macros whose definition
11004 (or undefinition) comes from the command line. These macros are defined
11005 before the first DW_MACINFO_start_file entry, and yet still need to be
11006 associated to the base file.
11008 To determine the base file name, we scan the macro definitions until we
11009 reach the first DW_MACINFO_start_file entry. We then initialize
11010 CURRENT_FILE accordingly so that any macro definition found before the
11011 first DW_MACINFO_start_file can still be associated to the base file. */
11013 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11014 mac_end = dwarf2_per_objfile->macinfo.buffer
11015 + dwarf2_per_objfile->macinfo.size;
11019 /* Do we at least have room for a macinfo type byte? */
11020 if (mac_ptr >= mac_end)
11022 /* Complaint is printed during the second pass as GDB will probably
11023 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11027 macinfo_type = read_1_byte (abfd, mac_ptr);
11030 switch (macinfo_type)
11032 /* A zero macinfo type indicates the end of the macro
11037 case DW_MACINFO_define:
11038 case DW_MACINFO_undef:
11039 /* Only skip the data by MAC_PTR. */
11041 unsigned int bytes_read;
11043 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11044 mac_ptr += bytes_read;
11045 read_string (abfd, mac_ptr, &bytes_read);
11046 mac_ptr += bytes_read;
11050 case DW_MACINFO_start_file:
11052 unsigned int bytes_read;
11055 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11056 mac_ptr += bytes_read;
11057 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11058 mac_ptr += bytes_read;
11060 current_file = macro_start_file (file, line, current_file, comp_dir,
11065 case DW_MACINFO_end_file:
11066 /* No data to skip by MAC_PTR. */
11069 case DW_MACINFO_vendor_ext:
11070 /* Only skip the data by MAC_PTR. */
11072 unsigned int bytes_read;
11074 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11075 mac_ptr += bytes_read;
11076 read_string (abfd, mac_ptr, &bytes_read);
11077 mac_ptr += bytes_read;
11084 } while (macinfo_type != 0 && current_file == NULL);
11086 /* Second pass: Process all entries.
11088 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11089 command-line macro definitions/undefinitions. This flag is unset when we
11090 reach the first DW_MACINFO_start_file entry. */
11092 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11094 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11095 GDB is still reading the definitions from command line. First
11096 DW_MACINFO_start_file will need to be ignored as it was already executed
11097 to create CURRENT_FILE for the main source holding also the command line
11098 definitions. On first met DW_MACINFO_start_file this flag is reset to
11099 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11101 at_commandline = 1;
11105 /* Do we at least have room for a macinfo type byte? */
11106 if (mac_ptr >= mac_end)
11108 dwarf2_macros_too_long_complaint ();
11112 macinfo_type = read_1_byte (abfd, mac_ptr);
11115 switch (macinfo_type)
11117 /* A zero macinfo type indicates the end of the macro
11122 case DW_MACINFO_define:
11123 case DW_MACINFO_undef:
11125 unsigned int bytes_read;
11129 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11130 mac_ptr += bytes_read;
11131 body = read_string (abfd, mac_ptr, &bytes_read);
11132 mac_ptr += bytes_read;
11134 if (! current_file)
11136 /* DWARF violation as no main source is present. */
11137 complaint (&symfile_complaints,
11138 _("debug info with no main source gives macro %s "
11141 DW_MACINFO_define ? _("definition") : macinfo_type ==
11142 DW_MACINFO_undef ? _("undefinition") :
11143 "something-or-other", line, body);
11146 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11147 complaint (&symfile_complaints,
11148 _("debug info gives %s macro %s with %s line %d: %s"),
11149 at_commandline ? _("command-line") : _("in-file"),
11151 DW_MACINFO_define ? _("definition") : macinfo_type ==
11152 DW_MACINFO_undef ? _("undefinition") :
11153 "something-or-other",
11154 line == 0 ? _("zero") : _("non-zero"), line, body);
11156 if (macinfo_type == DW_MACINFO_define)
11157 parse_macro_definition (current_file, line, body);
11158 else if (macinfo_type == DW_MACINFO_undef)
11159 macro_undef (current_file, line, body);
11163 case DW_MACINFO_start_file:
11165 unsigned int bytes_read;
11168 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11169 mac_ptr += bytes_read;
11170 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11171 mac_ptr += bytes_read;
11173 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11174 complaint (&symfile_complaints,
11175 _("debug info gives source %d included "
11176 "from %s at %s line %d"),
11177 file, at_commandline ? _("command-line") : _("file"),
11178 line == 0 ? _("zero") : _("non-zero"), line);
11180 if (at_commandline)
11182 /* This DW_MACINFO_start_file was executed in the pass one. */
11183 at_commandline = 0;
11186 current_file = macro_start_file (file, line,
11187 current_file, comp_dir,
11192 case DW_MACINFO_end_file:
11193 if (! current_file)
11194 complaint (&symfile_complaints,
11195 _("macro debug info has an unmatched `close_file' directive"));
11198 current_file = current_file->included_by;
11199 if (! current_file)
11201 enum dwarf_macinfo_record_type next_type;
11203 /* GCC circa March 2002 doesn't produce the zero
11204 type byte marking the end of the compilation
11205 unit. Complain if it's not there, but exit no
11208 /* Do we at least have room for a macinfo type byte? */
11209 if (mac_ptr >= mac_end)
11211 dwarf2_macros_too_long_complaint ();
11215 /* We don't increment mac_ptr here, so this is just
11217 next_type = read_1_byte (abfd, mac_ptr);
11218 if (next_type != 0)
11219 complaint (&symfile_complaints,
11220 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11227 case DW_MACINFO_vendor_ext:
11229 unsigned int bytes_read;
11233 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11234 mac_ptr += bytes_read;
11235 string = read_string (abfd, mac_ptr, &bytes_read);
11236 mac_ptr += bytes_read;
11238 /* We don't recognize any vendor extensions. */
11242 } while (macinfo_type != 0);
11245 /* Check if the attribute's form is a DW_FORM_block*
11246 if so return true else false. */
11248 attr_form_is_block (struct attribute *attr)
11250 return (attr == NULL ? 0 :
11251 attr->form == DW_FORM_block1
11252 || attr->form == DW_FORM_block2
11253 || attr->form == DW_FORM_block4
11254 || attr->form == DW_FORM_block);
11257 /* Return non-zero if ATTR's value is a section offset --- classes
11258 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11259 You may use DW_UNSND (attr) to retrieve such offsets.
11261 Section 7.5.4, "Attribute Encodings", explains that no attribute
11262 may have a value that belongs to more than one of these classes; it
11263 would be ambiguous if we did, because we use the same forms for all
11266 attr_form_is_section_offset (struct attribute *attr)
11268 return (attr->form == DW_FORM_data4
11269 || attr->form == DW_FORM_data8);
11273 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11274 zero otherwise. When this function returns true, you can apply
11275 dwarf2_get_attr_constant_value to it.
11277 However, note that for some attributes you must check
11278 attr_form_is_section_offset before using this test. DW_FORM_data4
11279 and DW_FORM_data8 are members of both the constant class, and of
11280 the classes that contain offsets into other debug sections
11281 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11282 that, if an attribute's can be either a constant or one of the
11283 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11284 taken as section offsets, not constants. */
11286 attr_form_is_constant (struct attribute *attr)
11288 switch (attr->form)
11290 case DW_FORM_sdata:
11291 case DW_FORM_udata:
11292 case DW_FORM_data1:
11293 case DW_FORM_data2:
11294 case DW_FORM_data4:
11295 case DW_FORM_data8:
11303 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
11304 struct dwarf2_cu *cu)
11306 if (attr_form_is_section_offset (attr)
11307 /* ".debug_loc" may not exist at all, or the offset may be outside
11308 the section. If so, fall through to the complaint in the
11310 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
11312 struct dwarf2_loclist_baton *baton;
11314 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11315 sizeof (struct dwarf2_loclist_baton));
11316 baton->per_cu = cu->per_cu;
11317 gdb_assert (baton->per_cu);
11319 /* We don't know how long the location list is, but make sure we
11320 don't run off the edge of the section. */
11321 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
11322 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
11323 baton->base_address = cu->base_address;
11324 if (cu->base_known == 0)
11325 complaint (&symfile_complaints,
11326 _("Location list used without specifying the CU base address."));
11328 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
11329 SYMBOL_LOCATION_BATON (sym) = baton;
11333 struct dwarf2_locexpr_baton *baton;
11335 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11336 sizeof (struct dwarf2_locexpr_baton));
11337 baton->per_cu = cu->per_cu;
11338 gdb_assert (baton->per_cu);
11340 if (attr_form_is_block (attr))
11342 /* Note that we're just copying the block's data pointer
11343 here, not the actual data. We're still pointing into the
11344 info_buffer for SYM's objfile; right now we never release
11345 that buffer, but when we do clean up properly this may
11347 baton->size = DW_BLOCK (attr)->size;
11348 baton->data = DW_BLOCK (attr)->data;
11352 dwarf2_invalid_attrib_class_complaint ("location description",
11353 SYMBOL_NATURAL_NAME (sym));
11355 baton->data = NULL;
11358 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
11359 SYMBOL_LOCATION_BATON (sym) = baton;
11363 /* Return the OBJFILE associated with the compilation unit CU. */
11366 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
11368 struct objfile *objfile = per_cu->psymtab->objfile;
11370 /* Return the master objfile, so that we can report and look up the
11371 correct file containing this variable. */
11372 if (objfile->separate_debug_objfile_backlink)
11373 objfile = objfile->separate_debug_objfile_backlink;
11378 /* Return the address size given in the compilation unit header for CU. */
11381 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
11384 return per_cu->cu->header.addr_size;
11387 /* If the CU is not currently read in, we re-read its header. */
11388 struct objfile *objfile = per_cu->psymtab->objfile;
11389 struct dwarf2_per_objfile *per_objfile
11390 = objfile_data (objfile, dwarf2_objfile_data_key);
11391 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
11393 struct comp_unit_head cu_header;
11394 memset (&cu_header, 0, sizeof cu_header);
11395 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
11396 return cu_header.addr_size;
11400 /* Locate the .debug_info compilation unit from CU's objfile which contains
11401 the DIE at OFFSET. Raises an error on failure. */
11403 static struct dwarf2_per_cu_data *
11404 dwarf2_find_containing_comp_unit (unsigned int offset,
11405 struct objfile *objfile)
11407 struct dwarf2_per_cu_data *this_cu;
11411 high = dwarf2_per_objfile->n_comp_units - 1;
11414 int mid = low + (high - low) / 2;
11415 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
11420 gdb_assert (low == high);
11421 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
11424 error (_("Dwarf Error: could not find partial DIE containing "
11425 "offset 0x%lx [in module %s]"),
11426 (long) offset, bfd_get_filename (objfile->obfd));
11428 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
11429 return dwarf2_per_objfile->all_comp_units[low-1];
11433 this_cu = dwarf2_per_objfile->all_comp_units[low];
11434 if (low == dwarf2_per_objfile->n_comp_units - 1
11435 && offset >= this_cu->offset + this_cu->length)
11436 error (_("invalid dwarf2 offset %u"), offset);
11437 gdb_assert (offset < this_cu->offset + this_cu->length);
11442 /* Locate the compilation unit from OBJFILE which is located at exactly
11443 OFFSET. Raises an error on failure. */
11445 static struct dwarf2_per_cu_data *
11446 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
11448 struct dwarf2_per_cu_data *this_cu;
11449 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
11450 if (this_cu->offset != offset)
11451 error (_("no compilation unit with offset %u."), offset);
11455 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11457 static struct dwarf2_cu *
11458 alloc_one_comp_unit (struct objfile *objfile)
11460 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
11461 cu->objfile = objfile;
11462 obstack_init (&cu->comp_unit_obstack);
11466 /* Release one cached compilation unit, CU. We unlink it from the tree
11467 of compilation units, but we don't remove it from the read_in_chain;
11468 the caller is responsible for that.
11469 NOTE: DATA is a void * because this function is also used as a
11470 cleanup routine. */
11473 free_one_comp_unit (void *data)
11475 struct dwarf2_cu *cu = data;
11477 if (cu->per_cu != NULL)
11478 cu->per_cu->cu = NULL;
11481 obstack_free (&cu->comp_unit_obstack, NULL);
11486 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11487 when we're finished with it. We can't free the pointer itself, but be
11488 sure to unlink it from the cache. Also release any associated storage
11489 and perform cache maintenance.
11491 Only used during partial symbol parsing. */
11494 free_stack_comp_unit (void *data)
11496 struct dwarf2_cu *cu = data;
11498 obstack_free (&cu->comp_unit_obstack, NULL);
11499 cu->partial_dies = NULL;
11501 if (cu->per_cu != NULL)
11503 /* This compilation unit is on the stack in our caller, so we
11504 should not xfree it. Just unlink it. */
11505 cu->per_cu->cu = NULL;
11508 /* If we had a per-cu pointer, then we may have other compilation
11509 units loaded, so age them now. */
11510 age_cached_comp_units ();
11514 /* Free all cached compilation units. */
11517 free_cached_comp_units (void *data)
11519 struct dwarf2_per_cu_data *per_cu, **last_chain;
11521 per_cu = dwarf2_per_objfile->read_in_chain;
11522 last_chain = &dwarf2_per_objfile->read_in_chain;
11523 while (per_cu != NULL)
11525 struct dwarf2_per_cu_data *next_cu;
11527 next_cu = per_cu->cu->read_in_chain;
11529 free_one_comp_unit (per_cu->cu);
11530 *last_chain = next_cu;
11536 /* Increase the age counter on each cached compilation unit, and free
11537 any that are too old. */
11540 age_cached_comp_units (void)
11542 struct dwarf2_per_cu_data *per_cu, **last_chain;
11544 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
11545 per_cu = dwarf2_per_objfile->read_in_chain;
11546 while (per_cu != NULL)
11548 per_cu->cu->last_used ++;
11549 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
11550 dwarf2_mark (per_cu->cu);
11551 per_cu = per_cu->cu->read_in_chain;
11554 per_cu = dwarf2_per_objfile->read_in_chain;
11555 last_chain = &dwarf2_per_objfile->read_in_chain;
11556 while (per_cu != NULL)
11558 struct dwarf2_per_cu_data *next_cu;
11560 next_cu = per_cu->cu->read_in_chain;
11562 if (!per_cu->cu->mark)
11564 free_one_comp_unit (per_cu->cu);
11565 *last_chain = next_cu;
11568 last_chain = &per_cu->cu->read_in_chain;
11574 /* Remove a single compilation unit from the cache. */
11577 free_one_cached_comp_unit (void *target_cu)
11579 struct dwarf2_per_cu_data *per_cu, **last_chain;
11581 per_cu = dwarf2_per_objfile->read_in_chain;
11582 last_chain = &dwarf2_per_objfile->read_in_chain;
11583 while (per_cu != NULL)
11585 struct dwarf2_per_cu_data *next_cu;
11587 next_cu = per_cu->cu->read_in_chain;
11589 if (per_cu->cu == target_cu)
11591 free_one_comp_unit (per_cu->cu);
11592 *last_chain = next_cu;
11596 last_chain = &per_cu->cu->read_in_chain;
11602 /* Release all extra memory associated with OBJFILE. */
11605 dwarf2_free_objfile (struct objfile *objfile)
11607 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
11609 if (dwarf2_per_objfile == NULL)
11612 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11613 free_cached_comp_units (NULL);
11615 /* Everything else should be on the objfile obstack. */
11618 /* A pair of DIE offset and GDB type pointer. We store these
11619 in a hash table separate from the DIEs, and preserve them
11620 when the DIEs are flushed out of cache. */
11622 struct dwarf2_offset_and_type
11624 unsigned int offset;
11628 /* Hash function for a dwarf2_offset_and_type. */
11631 offset_and_type_hash (const void *item)
11633 const struct dwarf2_offset_and_type *ofs = item;
11634 return ofs->offset;
11637 /* Equality function for a dwarf2_offset_and_type. */
11640 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
11642 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
11643 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
11644 return ofs_lhs->offset == ofs_rhs->offset;
11647 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11648 table if necessary. For convenience, return TYPE. */
11650 static struct type *
11651 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
11653 struct dwarf2_offset_and_type **slot, ofs;
11655 if (cu->type_hash == NULL)
11657 gdb_assert (cu->per_cu != NULL);
11658 cu->per_cu->type_hash
11659 = htab_create_alloc_ex (cu->header.length / 24,
11660 offset_and_type_hash,
11661 offset_and_type_eq,
11663 &cu->objfile->objfile_obstack,
11664 hashtab_obstack_allocate,
11665 dummy_obstack_deallocate);
11666 cu->type_hash = cu->per_cu->type_hash;
11669 ofs.offset = die->offset;
11671 slot = (struct dwarf2_offset_and_type **)
11672 htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
11673 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
11678 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11679 not have a saved type. */
11681 static struct type *
11682 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
11684 struct dwarf2_offset_and_type *slot, ofs;
11685 htab_t type_hash = cu->type_hash;
11687 if (type_hash == NULL)
11690 ofs.offset = die->offset;
11691 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
11698 /* Add a dependence relationship from CU to REF_PER_CU. */
11701 dwarf2_add_dependence (struct dwarf2_cu *cu,
11702 struct dwarf2_per_cu_data *ref_per_cu)
11706 if (cu->dependencies == NULL)
11708 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
11709 NULL, &cu->comp_unit_obstack,
11710 hashtab_obstack_allocate,
11711 dummy_obstack_deallocate);
11713 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
11715 *slot = ref_per_cu;
11718 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11719 Set the mark field in every compilation unit in the
11720 cache that we must keep because we are keeping CU. */
11723 dwarf2_mark_helper (void **slot, void *data)
11725 struct dwarf2_per_cu_data *per_cu;
11727 per_cu = (struct dwarf2_per_cu_data *) *slot;
11728 if (per_cu->cu->mark)
11730 per_cu->cu->mark = 1;
11732 if (per_cu->cu->dependencies != NULL)
11733 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
11738 /* Set the mark field in CU and in every other compilation unit in the
11739 cache that we must keep because we are keeping CU. */
11742 dwarf2_mark (struct dwarf2_cu *cu)
11747 if (cu->dependencies != NULL)
11748 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
11752 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
11756 per_cu->cu->mark = 0;
11757 per_cu = per_cu->cu->read_in_chain;
11761 /* Trivial hash function for partial_die_info: the hash value of a DIE
11762 is its offset in .debug_info for this objfile. */
11765 partial_die_hash (const void *item)
11767 const struct partial_die_info *part_die = item;
11768 return part_die->offset;
11771 /* Trivial comparison function for partial_die_info structures: two DIEs
11772 are equal if they have the same offset. */
11775 partial_die_eq (const void *item_lhs, const void *item_rhs)
11777 const struct partial_die_info *part_die_lhs = item_lhs;
11778 const struct partial_die_info *part_die_rhs = item_rhs;
11779 return part_die_lhs->offset == part_die_rhs->offset;
11782 static struct cmd_list_element *set_dwarf2_cmdlist;
11783 static struct cmd_list_element *show_dwarf2_cmdlist;
11786 set_dwarf2_cmd (char *args, int from_tty)
11788 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
11792 show_dwarf2_cmd (char *args, int from_tty)
11794 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
11797 /* If section described by INFO was mmapped, munmap it now. */
11800 munmap_section_buffer (struct dwarf2_section_info *info)
11802 if (info->was_mmapped)
11805 intptr_t begin = (intptr_t) info->buffer;
11806 intptr_t map_begin = begin & ~(pagesize - 1);
11807 size_t map_length = info->size + begin - map_begin;
11808 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
11810 /* Without HAVE_MMAP, we should never be here to begin with. */
11816 /* munmap debug sections for OBJFILE, if necessary. */
11819 dwarf2_per_objfile_cleanup (struct objfile *objfile, void *d)
11821 struct dwarf2_per_objfile *data = d;
11822 munmap_section_buffer (&data->info);
11823 munmap_section_buffer (&data->abbrev);
11824 munmap_section_buffer (&data->line);
11825 munmap_section_buffer (&data->str);
11826 munmap_section_buffer (&data->macinfo);
11827 munmap_section_buffer (&data->ranges);
11828 munmap_section_buffer (&data->loc);
11829 munmap_section_buffer (&data->frame);
11830 munmap_section_buffer (&data->eh_frame);
11833 void _initialize_dwarf2_read (void);
11836 _initialize_dwarf2_read (void)
11838 dwarf2_objfile_data_key
11839 = register_objfile_data_with_cleanup (dwarf2_per_objfile_cleanup);
11841 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
11842 Set DWARF 2 specific variables.\n\
11843 Configure DWARF 2 variables such as the cache size"),
11844 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
11845 0/*allow-unknown*/, &maintenance_set_cmdlist);
11847 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
11848 Show DWARF 2 specific variables\n\
11849 Show DWARF 2 variables such as the cache size"),
11850 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
11851 0/*allow-unknown*/, &maintenance_show_cmdlist);
11853 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
11854 &dwarf2_max_cache_age, _("\
11855 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11856 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11857 A higher limit means that cached compilation units will be stored\n\
11858 in memory longer, and more total memory will be used. Zero disables\n\
11859 caching, which can slow down startup."),
11861 show_dwarf2_max_cache_age,
11862 &set_dwarf2_cmdlist,
11863 &show_dwarf2_cmdlist);
11865 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
11866 Set debugging of the dwarf2 DIE reader."), _("\
11867 Show debugging of the dwarf2 DIE reader."), _("\
11868 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11869 The value is the maximum depth to print."),
11872 &setdebuglist, &showdebuglist);