1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
53 #include "gdb_string.h"
54 #include "gdb_assert.h"
55 #include <sys/types.h>
62 #define MAP_FAILED ((void *) -1)
67 /* .debug_info header for a compilation unit
68 Because of alignment constraints, this structure has padding and cannot
69 be mapped directly onto the beginning of the .debug_info section. */
70 typedef struct comp_unit_header
72 unsigned int length; /* length of the .debug_info
74 unsigned short version; /* version number -- 2 for DWARF
76 unsigned int abbrev_offset; /* offset into .debug_abbrev section */
77 unsigned char addr_size; /* byte size of an address -- 4 */
80 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
83 /* .debug_pubnames header
84 Because of alignment constraints, this structure has padding and cannot
85 be mapped directly onto the beginning of the .debug_info section. */
86 typedef struct pubnames_header
88 unsigned int length; /* length of the .debug_pubnames
90 unsigned char version; /* version number -- 2 for DWARF
92 unsigned int info_offset; /* offset into .debug_info section */
93 unsigned int info_size; /* byte size of .debug_info section
97 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
99 /* .debug_pubnames header
100 Because of alignment constraints, this structure has padding and cannot
101 be mapped directly onto the beginning of the .debug_info section. */
102 typedef struct aranges_header
104 unsigned int length; /* byte len of the .debug_aranges
106 unsigned short version; /* version number -- 2 for DWARF
108 unsigned int info_offset; /* offset into .debug_info section */
109 unsigned char addr_size; /* byte size of an address */
110 unsigned char seg_size; /* byte size of segment descriptor */
113 #define _ACTUAL_ARANGES_HEADER_SIZE 12
115 /* .debug_line statement program prologue
116 Because of alignment constraints, this structure has padding and cannot
117 be mapped directly onto the beginning of the .debug_info section. */
118 typedef struct statement_prologue
120 unsigned int total_length; /* byte length of the statement
122 unsigned short version; /* version number -- 2 for DWARF
124 unsigned int prologue_length; /* # bytes between prologue &
126 unsigned char minimum_instruction_length; /* byte size of
128 unsigned char default_is_stmt; /* initial value of is_stmt
131 unsigned char line_range;
132 unsigned char opcode_base; /* number assigned to first special
134 unsigned char *standard_opcode_lengths;
138 /* When non-zero, dump DIEs after they are read in. */
139 static int dwarf2_die_debug = 0;
143 /* When set, the file that we're processing is known to have debugging
144 info for C++ namespaces. GCC 3.3.x did not produce this information,
145 but later versions do. */
147 static int processing_has_namespace_info;
149 static const struct objfile_data *dwarf2_objfile_data_key;
151 struct dwarf2_section_info
159 struct dwarf2_per_objfile
161 struct dwarf2_section_info info;
162 struct dwarf2_section_info abbrev;
163 struct dwarf2_section_info line;
164 struct dwarf2_section_info pubnames;
165 struct dwarf2_section_info aranges;
166 struct dwarf2_section_info loc;
167 struct dwarf2_section_info macinfo;
168 struct dwarf2_section_info str;
169 struct dwarf2_section_info ranges;
170 struct dwarf2_section_info types;
171 struct dwarf2_section_info frame;
172 struct dwarf2_section_info eh_frame;
174 /* A list of all the compilation units. This is used to locate
175 the target compilation unit of a particular reference. */
176 struct dwarf2_per_cu_data **all_comp_units;
178 /* The number of compilation units in ALL_COMP_UNITS. */
181 /* A chain of compilation units that are currently read in, so that
182 they can be freed later. */
183 struct dwarf2_per_cu_data *read_in_chain;
185 /* A table mapping .debug_types signatures to its signatured_type entry.
186 This is NULL if the .debug_types section hasn't been read in yet. */
187 htab_t signatured_types;
189 /* A flag indicating wether this objfile has a section loaded at a
191 int has_section_at_zero;
194 static struct dwarf2_per_objfile *dwarf2_per_objfile;
196 /* names of the debugging sections */
198 /* Note that if the debugging section has been compressed, it might
199 have a name like .zdebug_info. */
201 #define INFO_SECTION "debug_info"
202 #define ABBREV_SECTION "debug_abbrev"
203 #define LINE_SECTION "debug_line"
204 #define PUBNAMES_SECTION "debug_pubnames"
205 #define ARANGES_SECTION "debug_aranges"
206 #define LOC_SECTION "debug_loc"
207 #define MACINFO_SECTION "debug_macinfo"
208 #define STR_SECTION "debug_str"
209 #define RANGES_SECTION "debug_ranges"
210 #define TYPES_SECTION "debug_types"
211 #define FRAME_SECTION "debug_frame"
212 #define EH_FRAME_SECTION "eh_frame"
214 /* local data types */
216 /* We hold several abbreviation tables in memory at the same time. */
217 #ifndef ABBREV_HASH_SIZE
218 #define ABBREV_HASH_SIZE 121
221 /* The data in a compilation unit header, after target2host
222 translation, looks like this. */
223 struct comp_unit_head
227 unsigned char addr_size;
228 unsigned char signed_addr_p;
229 unsigned int abbrev_offset;
231 /* Size of file offsets; either 4 or 8. */
232 unsigned int offset_size;
234 /* Size of the length field; either 4 or 12. */
235 unsigned int initial_length_size;
237 /* Offset to the first byte of this compilation unit header in the
238 .debug_info section, for resolving relative reference dies. */
241 /* Offset to first die in this cu from the start of the cu.
242 This will be the first byte following the compilation unit header. */
243 unsigned int first_die_offset;
246 /* Internal state when decoding a particular compilation unit. */
249 /* The objfile containing this compilation unit. */
250 struct objfile *objfile;
252 /* The header of the compilation unit. */
253 struct comp_unit_head header;
255 /* Base address of this compilation unit. */
256 CORE_ADDR base_address;
258 /* Non-zero if base_address has been set. */
261 struct function_range *first_fn, *last_fn, *cached_fn;
263 /* The language we are debugging. */
264 enum language language;
265 const struct language_defn *language_defn;
267 const char *producer;
269 /* The generic symbol table building routines have separate lists for
270 file scope symbols and all all other scopes (local scopes). So
271 we need to select the right one to pass to add_symbol_to_list().
272 We do it by keeping a pointer to the correct list in list_in_scope.
274 FIXME: The original dwarf code just treated the file scope as the
275 first local scope, and all other local scopes as nested local
276 scopes, and worked fine. Check to see if we really need to
277 distinguish these in buildsym.c. */
278 struct pending **list_in_scope;
280 /* DWARF abbreviation table associated with this compilation unit. */
281 struct abbrev_info **dwarf2_abbrevs;
283 /* Storage for the abbrev table. */
284 struct obstack abbrev_obstack;
286 /* Hash table holding all the loaded partial DIEs. */
289 /* Storage for things with the same lifetime as this read-in compilation
290 unit, including partial DIEs. */
291 struct obstack comp_unit_obstack;
293 /* When multiple dwarf2_cu structures are living in memory, this field
294 chains them all together, so that they can be released efficiently.
295 We will probably also want a generation counter so that most-recently-used
296 compilation units are cached... */
297 struct dwarf2_per_cu_data *read_in_chain;
299 /* Backchain to our per_cu entry if the tree has been built. */
300 struct dwarf2_per_cu_data *per_cu;
302 /* Pointer to the die -> type map. Although it is stored
303 permanently in per_cu, we copy it here to avoid double
307 /* How many compilation units ago was this CU last referenced? */
310 /* A hash table of die offsets for following references. */
313 /* Full DIEs if read in. */
314 struct die_info *dies;
316 /* A set of pointers to dwarf2_per_cu_data objects for compilation
317 units referenced by this one. Only set during full symbol processing;
318 partial symbol tables do not have dependencies. */
321 /* Header data from the line table, during full symbol processing. */
322 struct line_header *line_header;
324 /* Mark used when releasing cached dies. */
325 unsigned int mark : 1;
327 /* This flag will be set if this compilation unit might include
328 inter-compilation-unit references. */
329 unsigned int has_form_ref_addr : 1;
331 /* This flag will be set if this compilation unit includes any
332 DW_TAG_namespace DIEs. If we know that there are explicit
333 DIEs for namespaces, we don't need to try to infer them
334 from mangled names. */
335 unsigned int has_namespace_info : 1;
338 /* Persistent data held for a compilation unit, even when not
339 processing it. We put a pointer to this structure in the
340 read_symtab_private field of the psymtab. If we encounter
341 inter-compilation-unit references, we also maintain a sorted
342 list of all compilation units. */
344 struct dwarf2_per_cu_data
346 /* The start offset and length of this compilation unit. 2**29-1
347 bytes should suffice to store the length of any compilation unit
348 - if it doesn't, GDB will fall over anyway.
349 NOTE: Unlike comp_unit_head.length, this length includes
350 initial_length_size. */
352 unsigned int length : 29;
354 /* Flag indicating this compilation unit will be read in before
355 any of the current compilation units are processed. */
356 unsigned int queued : 1;
358 /* This flag will be set if we need to load absolutely all DIEs
359 for this compilation unit, instead of just the ones we think
360 are interesting. It gets set if we look for a DIE in the
361 hash table and don't find it. */
362 unsigned int load_all_dies : 1;
364 /* Non-zero if this CU is from .debug_types.
365 Otherwise it's from .debug_info. */
366 unsigned int from_debug_types : 1;
368 /* Set iff currently read in. */
369 struct dwarf2_cu *cu;
371 /* If full symbols for this CU have been read in, then this field
372 holds a map of DIE offsets to types. It isn't always possible
373 to reconstruct this information later, so we have to preserve
377 /* The partial symbol table associated with this compilation unit,
378 or NULL for partial units (which do not have an associated
380 struct partial_symtab *psymtab;
383 /* Entry in the signatured_types hash table. */
385 struct signatured_type
389 /* Offset in .debug_types of the TU (type_unit) for this type. */
392 /* Offset in .debug_types of the type defined by this TU. */
393 unsigned int type_offset;
395 /* The CU(/TU) of this type. */
396 struct dwarf2_per_cu_data per_cu;
399 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
400 which are used for both .debug_info and .debug_types dies.
401 All parameters here are unchanging for the life of the call.
402 This struct exists to abstract away the constant parameters of
405 struct die_reader_specs
407 /* The bfd of this objfile. */
410 /* The CU of the DIE we are parsing. */
411 struct dwarf2_cu *cu;
413 /* Pointer to start of section buffer.
414 This is either the start of .debug_info or .debug_types. */
415 const gdb_byte *buffer;
418 /* The line number information for a compilation unit (found in the
419 .debug_line section) begins with a "statement program header",
420 which contains the following information. */
423 unsigned int total_length;
424 unsigned short version;
425 unsigned int header_length;
426 unsigned char minimum_instruction_length;
427 unsigned char default_is_stmt;
429 unsigned char line_range;
430 unsigned char opcode_base;
432 /* standard_opcode_lengths[i] is the number of operands for the
433 standard opcode whose value is i. This means that
434 standard_opcode_lengths[0] is unused, and the last meaningful
435 element is standard_opcode_lengths[opcode_base - 1]. */
436 unsigned char *standard_opcode_lengths;
438 /* The include_directories table. NOTE! These strings are not
439 allocated with xmalloc; instead, they are pointers into
440 debug_line_buffer. If you try to free them, `free' will get
442 unsigned int num_include_dirs, include_dirs_size;
445 /* The file_names table. NOTE! These strings are not allocated
446 with xmalloc; instead, they are pointers into debug_line_buffer.
447 Don't try to free them directly. */
448 unsigned int num_file_names, file_names_size;
452 unsigned int dir_index;
453 unsigned int mod_time;
455 int included_p; /* Non-zero if referenced by the Line Number Program. */
456 struct symtab *symtab; /* The associated symbol table, if any. */
459 /* The start and end of the statement program following this
460 header. These point into dwarf2_per_objfile->line_buffer. */
461 gdb_byte *statement_program_start, *statement_program_end;
464 /* When we construct a partial symbol table entry we only
465 need this much information. */
466 struct partial_die_info
468 /* Offset of this DIE. */
471 /* DWARF-2 tag for this DIE. */
472 ENUM_BITFIELD(dwarf_tag) tag : 16;
474 /* Assorted flags describing the data found in this DIE. */
475 unsigned int has_children : 1;
476 unsigned int is_external : 1;
477 unsigned int is_declaration : 1;
478 unsigned int has_type : 1;
479 unsigned int has_specification : 1;
480 unsigned int has_pc_info : 1;
482 /* Flag set if the SCOPE field of this structure has been
484 unsigned int scope_set : 1;
486 /* Flag set if the DIE has a byte_size attribute. */
487 unsigned int has_byte_size : 1;
489 /* The name of this DIE. Normally the value of DW_AT_name, but
490 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
494 /* The scope to prepend to our children. This is generally
495 allocated on the comp_unit_obstack, so will disappear
496 when this compilation unit leaves the cache. */
499 /* The location description associated with this DIE, if any. */
500 struct dwarf_block *locdesc;
502 /* If HAS_PC_INFO, the PC range associated with this DIE. */
506 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
507 DW_AT_sibling, if any. */
510 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
511 DW_AT_specification (or DW_AT_abstract_origin or
513 unsigned int spec_offset;
515 /* Pointers to this DIE's parent, first child, and next sibling,
517 struct partial_die_info *die_parent, *die_child, *die_sibling;
520 /* This data structure holds the information of an abbrev. */
523 unsigned int number; /* number identifying abbrev */
524 enum dwarf_tag tag; /* dwarf tag */
525 unsigned short has_children; /* boolean */
526 unsigned short num_attrs; /* number of attributes */
527 struct attr_abbrev *attrs; /* an array of attribute descriptions */
528 struct abbrev_info *next; /* next in chain */
533 ENUM_BITFIELD(dwarf_attribute) name : 16;
534 ENUM_BITFIELD(dwarf_form) form : 16;
537 /* Attributes have a name and a value */
540 ENUM_BITFIELD(dwarf_attribute) name : 16;
541 ENUM_BITFIELD(dwarf_form) form : 15;
543 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
544 field should be in u.str (existing only for DW_STRING) but it is kept
545 here for better struct attribute alignment. */
546 unsigned int string_is_canonical : 1;
551 struct dwarf_block *blk;
555 struct signatured_type *signatured_type;
560 /* This data structure holds a complete die structure. */
563 /* DWARF-2 tag for this DIE. */
564 ENUM_BITFIELD(dwarf_tag) tag : 16;
566 /* Number of attributes */
567 unsigned short num_attrs;
572 /* Offset in .debug_info or .debug_types section. */
575 /* The dies in a compilation unit form an n-ary tree. PARENT
576 points to this die's parent; CHILD points to the first child of
577 this node; and all the children of a given node are chained
578 together via their SIBLING fields, terminated by a die whose
580 struct die_info *child; /* Its first child, if any. */
581 struct die_info *sibling; /* Its next sibling, if any. */
582 struct die_info *parent; /* Its parent, if any. */
584 /* An array of attributes, with NUM_ATTRS elements. There may be
585 zero, but it's not common and zero-sized arrays are not
586 sufficiently portable C. */
587 struct attribute attrs[1];
590 struct function_range
593 CORE_ADDR lowpc, highpc;
595 struct function_range *next;
598 /* Get at parts of an attribute structure */
600 #define DW_STRING(attr) ((attr)->u.str)
601 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
602 #define DW_UNSND(attr) ((attr)->u.unsnd)
603 #define DW_BLOCK(attr) ((attr)->u.blk)
604 #define DW_SND(attr) ((attr)->u.snd)
605 #define DW_ADDR(attr) ((attr)->u.addr)
606 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
608 /* Blocks are a bunch of untyped bytes. */
615 #ifndef ATTR_ALLOC_CHUNK
616 #define ATTR_ALLOC_CHUNK 4
619 /* Allocate fields for structs, unions and enums in this size. */
620 #ifndef DW_FIELD_ALLOC_CHUNK
621 #define DW_FIELD_ALLOC_CHUNK 4
624 /* A zeroed version of a partial die for initialization purposes. */
625 static struct partial_die_info zeroed_partial_die;
627 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
628 but this would require a corresponding change in unpack_field_as_long
630 static int bits_per_byte = 8;
632 /* The routines that read and process dies for a C struct or C++ class
633 pass lists of data member fields and lists of member function fields
634 in an instance of a field_info structure, as defined below. */
637 /* List of data member and baseclasses fields. */
640 struct nextfield *next;
645 *fields, *baseclasses;
647 /* Number of fields (including baseclasses). */
650 /* Number of baseclasses. */
653 /* Set if the accesibility of one of the fields is not public. */
654 int non_public_fields;
656 /* Member function fields array, entries are allocated in the order they
657 are encountered in the object file. */
660 struct nextfnfield *next;
661 struct fn_field fnfield;
665 /* Member function fieldlist array, contains name of possibly overloaded
666 member function, number of overloaded member functions and a pointer
667 to the head of the member function field chain. */
672 struct nextfnfield *head;
676 /* Number of entries in the fnfieldlists array. */
680 /* One item on the queue of compilation units to read in full symbols
682 struct dwarf2_queue_item
684 struct dwarf2_per_cu_data *per_cu;
685 struct dwarf2_queue_item *next;
688 /* The current queue. */
689 static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail;
691 /* Loaded secondary compilation units are kept in memory until they
692 have not been referenced for the processing of this many
693 compilation units. Set this to zero to disable caching. Cache
694 sizes of up to at least twenty will improve startup time for
695 typical inter-CU-reference binaries, at an obvious memory cost. */
696 static int dwarf2_max_cache_age = 5;
698 show_dwarf2_max_cache_age (struct ui_file *file, int from_tty,
699 struct cmd_list_element *c, const char *value)
701 fprintf_filtered (file, _("\
702 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
707 /* Various complaints about symbol reading that don't abort the process */
710 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
712 complaint (&symfile_complaints,
713 _("statement list doesn't fit in .debug_line section"));
717 dwarf2_debug_line_missing_file_complaint (void)
719 complaint (&symfile_complaints,
720 _(".debug_line section has line data without a file"));
724 dwarf2_debug_line_missing_end_sequence_complaint (void)
726 complaint (&symfile_complaints,
727 _(".debug_line section has line program sequence without an end"));
731 dwarf2_complex_location_expr_complaint (void)
733 complaint (&symfile_complaints, _("location expression too complex"));
737 dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2,
740 complaint (&symfile_complaints,
741 _("const value length mismatch for '%s', got %d, expected %d"), arg1,
746 dwarf2_macros_too_long_complaint (void)
748 complaint (&symfile_complaints,
749 _("macro info runs off end of `.debug_macinfo' section"));
753 dwarf2_macro_malformed_definition_complaint (const char *arg1)
755 complaint (&symfile_complaints,
756 _("macro debug info contains a malformed macro definition:\n`%s'"),
761 dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2)
763 complaint (&symfile_complaints,
764 _("invalid attribute class or form for '%s' in '%s'"), arg1, arg2);
767 /* local function prototypes */
769 static void dwarf2_locate_sections (bfd *, asection *, void *);
772 static void dwarf2_build_psymtabs_easy (struct objfile *);
775 static void dwarf2_create_include_psymtab (char *, struct partial_symtab *,
778 static void dwarf2_build_include_psymtabs (struct dwarf2_cu *,
780 struct partial_symtab *);
782 static void dwarf2_build_psymtabs_hard (struct objfile *);
784 static void scan_partial_symbols (struct partial_die_info *,
785 CORE_ADDR *, CORE_ADDR *,
786 int, struct dwarf2_cu *);
788 static void add_partial_symbol (struct partial_die_info *,
791 static int pdi_needs_namespace (enum dwarf_tag tag);
793 static void add_partial_namespace (struct partial_die_info *pdi,
794 CORE_ADDR *lowpc, CORE_ADDR *highpc,
795 int need_pc, struct dwarf2_cu *cu);
797 static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
798 CORE_ADDR *highpc, int need_pc,
799 struct dwarf2_cu *cu);
801 static void add_partial_enumeration (struct partial_die_info *enum_pdi,
802 struct dwarf2_cu *cu);
804 static void add_partial_subprogram (struct partial_die_info *pdi,
805 CORE_ADDR *lowpc, CORE_ADDR *highpc,
806 int need_pc, struct dwarf2_cu *cu);
808 static gdb_byte *locate_pdi_sibling (struct partial_die_info *orig_pdi,
809 gdb_byte *buffer, gdb_byte *info_ptr,
810 bfd *abfd, struct dwarf2_cu *cu);
812 static void dwarf2_psymtab_to_symtab (struct partial_symtab *);
814 static void psymtab_to_symtab_1 (struct partial_symtab *);
816 static void dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu);
818 static void dwarf2_free_abbrev_table (void *);
820 static struct abbrev_info *peek_die_abbrev (gdb_byte *, unsigned int *,
823 static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
826 static struct partial_die_info *load_partial_dies (bfd *,
827 gdb_byte *, gdb_byte *,
828 int, struct dwarf2_cu *);
830 static gdb_byte *read_partial_die (struct partial_die_info *,
831 struct abbrev_info *abbrev,
833 gdb_byte *, gdb_byte *,
836 static struct partial_die_info *find_partial_die (unsigned int,
839 static void fixup_partial_die (struct partial_die_info *,
842 static gdb_byte *read_attribute (struct attribute *, struct attr_abbrev *,
843 bfd *, gdb_byte *, struct dwarf2_cu *);
845 static gdb_byte *read_attribute_value (struct attribute *, unsigned,
846 bfd *, gdb_byte *, struct dwarf2_cu *);
848 static unsigned int read_1_byte (bfd *, gdb_byte *);
850 static int read_1_signed_byte (bfd *, gdb_byte *);
852 static unsigned int read_2_bytes (bfd *, gdb_byte *);
854 static unsigned int read_4_bytes (bfd *, gdb_byte *);
856 static ULONGEST read_8_bytes (bfd *, gdb_byte *);
858 static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *,
861 static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *);
863 static LONGEST read_checked_initial_length_and_offset
864 (bfd *, gdb_byte *, const struct comp_unit_head *,
865 unsigned int *, unsigned int *);
867 static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *,
870 static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int);
872 static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int);
874 static char *read_string (bfd *, gdb_byte *, unsigned int *);
876 static char *read_indirect_string (bfd *, gdb_byte *,
877 const struct comp_unit_head *,
880 static unsigned long read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *);
882 static long read_signed_leb128 (bfd *, gdb_byte *, unsigned int *);
884 static gdb_byte *skip_leb128 (bfd *, gdb_byte *);
886 static void set_cu_language (unsigned int, struct dwarf2_cu *);
888 static struct attribute *dwarf2_attr (struct die_info *, unsigned int,
891 static struct attribute *dwarf2_attr_no_follow (struct die_info *,
895 static int dwarf2_flag_true_p (struct die_info *die, unsigned name,
896 struct dwarf2_cu *cu);
898 static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu);
900 static struct die_info *die_specification (struct die_info *die,
901 struct dwarf2_cu **);
903 static void free_line_header (struct line_header *lh);
905 static void add_file_name (struct line_header *, char *, unsigned int,
906 unsigned int, unsigned int);
908 static struct line_header *(dwarf_decode_line_header
909 (unsigned int offset,
910 bfd *abfd, struct dwarf2_cu *cu));
912 static void dwarf_decode_lines (struct line_header *, char *, bfd *,
913 struct dwarf2_cu *, struct partial_symtab *);
915 static void dwarf2_start_subfile (char *, char *, char *);
917 static struct symbol *new_symbol (struct die_info *, struct type *,
920 static void dwarf2_const_value (struct attribute *, struct symbol *,
923 static void dwarf2_const_value_data (struct attribute *attr,
927 static struct type *die_type (struct die_info *, struct dwarf2_cu *);
929 static struct type *die_containing_type (struct die_info *,
932 static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
934 static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
936 static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
938 static char *typename_concat (struct obstack *,
943 static void read_file_scope (struct die_info *, struct dwarf2_cu *);
945 static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *);
947 static void read_func_scope (struct die_info *, struct dwarf2_cu *);
949 static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *);
951 static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *,
952 struct dwarf2_cu *, struct partial_symtab *);
954 static int dwarf2_get_pc_bounds (struct die_info *,
955 CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *,
956 struct partial_symtab *);
958 static void get_scope_pc_bounds (struct die_info *,
959 CORE_ADDR *, CORE_ADDR *,
962 static void dwarf2_record_block_ranges (struct die_info *, struct block *,
963 CORE_ADDR, struct dwarf2_cu *);
965 static void dwarf2_add_field (struct field_info *, struct die_info *,
968 static void dwarf2_attach_fields_to_type (struct field_info *,
969 struct type *, struct dwarf2_cu *);
971 static void dwarf2_add_member_fn (struct field_info *,
972 struct die_info *, struct type *,
975 static void dwarf2_attach_fn_fields_to_type (struct field_info *,
976 struct type *, struct dwarf2_cu *);
978 static void process_structure_scope (struct die_info *, struct dwarf2_cu *);
980 static const char *determine_class_name (struct die_info *die,
981 struct dwarf2_cu *cu);
983 static void read_common_block (struct die_info *, struct dwarf2_cu *);
985 static void read_namespace (struct die_info *die, struct dwarf2_cu *);
987 static void read_module (struct die_info *die, struct dwarf2_cu *cu);
989 static void read_import_statement (struct die_info *die, struct dwarf2_cu *);
991 static const char *namespace_name (struct die_info *die,
992 int *is_anonymous, struct dwarf2_cu *);
994 static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *);
996 static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *);
998 static enum dwarf_array_dim_ordering read_array_order (struct die_info *,
1001 static struct die_info *read_comp_unit (gdb_byte *, struct dwarf2_cu *);
1003 static struct die_info *read_die_and_children_1 (const struct die_reader_specs *reader,
1005 gdb_byte **new_info_ptr,
1006 struct die_info *parent);
1008 static struct die_info *read_die_and_children (const struct die_reader_specs *reader,
1010 gdb_byte **new_info_ptr,
1011 struct die_info *parent);
1013 static struct die_info *read_die_and_siblings (const struct die_reader_specs *reader,
1015 gdb_byte **new_info_ptr,
1016 struct die_info *parent);
1018 static gdb_byte *read_full_die (const struct die_reader_specs *reader,
1019 struct die_info **, gdb_byte *,
1022 static void process_die (struct die_info *, struct dwarf2_cu *);
1024 static char *dwarf2_linkage_name (struct die_info *, struct dwarf2_cu *);
1026 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *,
1029 static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *);
1031 static struct die_info *dwarf2_extension (struct die_info *die,
1032 struct dwarf2_cu **);
1034 static char *dwarf_tag_name (unsigned int);
1036 static char *dwarf_attr_name (unsigned int);
1038 static char *dwarf_form_name (unsigned int);
1040 static char *dwarf_stack_op_name (unsigned int);
1042 static char *dwarf_bool_name (unsigned int);
1044 static char *dwarf_type_encoding_name (unsigned int);
1047 static char *dwarf_cfi_name (unsigned int);
1050 static struct die_info *sibling_die (struct die_info *);
1052 static void dump_die_shallow (struct ui_file *, int indent, struct die_info *);
1054 static void dump_die_for_error (struct die_info *);
1056 static void dump_die_1 (struct ui_file *, int level, int max_level,
1059 /*static*/ void dump_die (struct die_info *, int max_level);
1061 static void store_in_ref_table (struct die_info *,
1062 struct dwarf2_cu *);
1064 static int is_ref_attr (struct attribute *);
1066 static unsigned int dwarf2_get_ref_die_offset (struct attribute *);
1068 static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int);
1070 static struct die_info *follow_die_ref_or_sig (struct die_info *,
1072 struct dwarf2_cu **);
1074 static struct die_info *follow_die_ref (struct die_info *,
1076 struct dwarf2_cu **);
1078 static struct die_info *follow_die_sig (struct die_info *,
1080 struct dwarf2_cu **);
1082 static void read_signatured_type_at_offset (struct objfile *objfile,
1083 unsigned int offset);
1085 static void read_signatured_type (struct objfile *,
1086 struct signatured_type *type_sig);
1088 /* memory allocation interface */
1090 static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *);
1092 static struct abbrev_info *dwarf_alloc_abbrev (struct dwarf2_cu *);
1094 static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int);
1096 static void initialize_cu_func_list (struct dwarf2_cu *);
1098 static void add_to_cu_func_list (const char *, CORE_ADDR, CORE_ADDR,
1099 struct dwarf2_cu *);
1101 static void dwarf_decode_macros (struct line_header *, unsigned int,
1102 char *, bfd *, struct dwarf2_cu *);
1104 static int attr_form_is_block (struct attribute *);
1106 static int attr_form_is_section_offset (struct attribute *);
1108 static int attr_form_is_constant (struct attribute *);
1110 static void dwarf2_symbol_mark_computed (struct attribute *attr,
1112 struct dwarf2_cu *cu);
1114 static gdb_byte *skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
1115 struct abbrev_info *abbrev,
1116 struct dwarf2_cu *cu);
1118 static void free_stack_comp_unit (void *);
1120 static hashval_t partial_die_hash (const void *item);
1122 static int partial_die_eq (const void *item_lhs, const void *item_rhs);
1124 static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit
1125 (unsigned int offset, struct objfile *objfile);
1127 static struct dwarf2_per_cu_data *dwarf2_find_comp_unit
1128 (unsigned int offset, struct objfile *objfile);
1130 static struct dwarf2_cu *alloc_one_comp_unit (struct objfile *objfile);
1132 static void free_one_comp_unit (void *);
1134 static void free_cached_comp_units (void *);
1136 static void age_cached_comp_units (void);
1138 static void free_one_cached_comp_unit (void *);
1140 static struct type *set_die_type (struct die_info *, struct type *,
1141 struct dwarf2_cu *);
1143 static void create_all_comp_units (struct objfile *);
1145 static void load_full_comp_unit (struct dwarf2_per_cu_data *,
1148 static void process_full_comp_unit (struct dwarf2_per_cu_data *);
1150 static void dwarf2_add_dependence (struct dwarf2_cu *,
1151 struct dwarf2_per_cu_data *);
1153 static void dwarf2_mark (struct dwarf2_cu *);
1155 static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
1157 static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
1159 /* Try to locate the sections we need for DWARF 2 debugging
1160 information and return true if we have enough to do something. */
1163 dwarf2_has_info (struct objfile *objfile)
1165 struct dwarf2_per_objfile *data;
1167 /* Initialize per-objfile state. */
1168 data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
1169 memset (data, 0, sizeof (*data));
1170 set_objfile_data (objfile, dwarf2_objfile_data_key, data);
1171 dwarf2_per_objfile = data;
1173 bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
1174 return (data->info.asection != NULL && data->abbrev.asection != NULL);
1177 /* When loading sections, we can either look for ".<name>", or for
1178 * ".z<name>", which indicates a compressed section. */
1181 section_is_p (const char *section_name, const char *name)
1183 return (section_name[0] == '.'
1184 && (strcmp (section_name + 1, name) == 0
1185 || (section_name[1] == 'z'
1186 && strcmp (section_name + 2, name) == 0)));
1189 /* This function is mapped across the sections and remembers the
1190 offset and size of each of the debugging sections we are interested
1194 dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
1196 if (section_is_p (sectp->name, INFO_SECTION))
1198 dwarf2_per_objfile->info.asection = sectp;
1199 dwarf2_per_objfile->info.size = bfd_get_section_size (sectp);
1201 else if (section_is_p (sectp->name, ABBREV_SECTION))
1203 dwarf2_per_objfile->abbrev.asection = sectp;
1204 dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp);
1206 else if (section_is_p (sectp->name, LINE_SECTION))
1208 dwarf2_per_objfile->line.asection = sectp;
1209 dwarf2_per_objfile->line.size = bfd_get_section_size (sectp);
1211 else if (section_is_p (sectp->name, PUBNAMES_SECTION))
1213 dwarf2_per_objfile->pubnames.asection = sectp;
1214 dwarf2_per_objfile->pubnames.size = bfd_get_section_size (sectp);
1216 else if (section_is_p (sectp->name, ARANGES_SECTION))
1218 dwarf2_per_objfile->aranges.asection = sectp;
1219 dwarf2_per_objfile->aranges.size = bfd_get_section_size (sectp);
1221 else if (section_is_p (sectp->name, LOC_SECTION))
1223 dwarf2_per_objfile->loc.asection = sectp;
1224 dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp);
1226 else if (section_is_p (sectp->name, MACINFO_SECTION))
1228 dwarf2_per_objfile->macinfo.asection = sectp;
1229 dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp);
1231 else if (section_is_p (sectp->name, STR_SECTION))
1233 dwarf2_per_objfile->str.asection = sectp;
1234 dwarf2_per_objfile->str.size = bfd_get_section_size (sectp);
1236 else if (section_is_p (sectp->name, FRAME_SECTION))
1238 dwarf2_per_objfile->frame.asection = sectp;
1239 dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp);
1241 else if (section_is_p (sectp->name, EH_FRAME_SECTION))
1243 flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
1244 if (aflag & SEC_HAS_CONTENTS)
1246 dwarf2_per_objfile->eh_frame.asection = sectp;
1247 dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp);
1250 else if (section_is_p (sectp->name, RANGES_SECTION))
1252 dwarf2_per_objfile->ranges.asection = sectp;
1253 dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp);
1255 else if (section_is_p (sectp->name, TYPES_SECTION))
1257 dwarf2_per_objfile->types.asection = sectp;
1258 dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
1261 if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD)
1262 && bfd_section_vma (abfd, sectp) == 0)
1263 dwarf2_per_objfile->has_section_at_zero = 1;
1266 /* Decompress a section that was compressed using zlib. Store the
1267 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1270 zlib_decompress_section (struct objfile *objfile, asection *sectp,
1271 gdb_byte **outbuf, bfd_size_type *outsize)
1273 bfd *abfd = objfile->obfd;
1275 error (_("Support for zlib-compressed DWARF data (from '%s') "
1276 "is disabled in this copy of GDB"),
1277 bfd_get_filename (abfd));
1279 bfd_size_type compressed_size = bfd_get_section_size (sectp);
1280 gdb_byte *compressed_buffer = xmalloc (compressed_size);
1281 struct cleanup *cleanup = make_cleanup (xfree, compressed_buffer);
1282 bfd_size_type uncompressed_size;
1283 gdb_byte *uncompressed_buffer;
1286 int header_size = 12;
1288 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1289 || bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
1290 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1291 bfd_get_filename (abfd));
1293 /* Read the zlib header. In this case, it should be "ZLIB" followed
1294 by the uncompressed section size, 8 bytes in big-endian order. */
1295 if (compressed_size < header_size
1296 || strncmp (compressed_buffer, "ZLIB", 4) != 0)
1297 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1298 bfd_get_filename (abfd));
1299 uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
1300 uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
1301 uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
1302 uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
1303 uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
1304 uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
1305 uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
1306 uncompressed_size += compressed_buffer[11];
1308 /* It is possible the section consists of several compressed
1309 buffers concatenated together, so we uncompress in a loop. */
1313 strm.avail_in = compressed_size - header_size;
1314 strm.next_in = (Bytef*) compressed_buffer + header_size;
1315 strm.avail_out = uncompressed_size;
1316 uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
1318 rc = inflateInit (&strm);
1319 while (strm.avail_in > 0)
1322 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1323 bfd_get_filename (abfd), rc);
1324 strm.next_out = ((Bytef*) uncompressed_buffer
1325 + (uncompressed_size - strm.avail_out));
1326 rc = inflate (&strm, Z_FINISH);
1327 if (rc != Z_STREAM_END)
1328 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1329 bfd_get_filename (abfd), rc);
1330 rc = inflateReset (&strm);
1332 rc = inflateEnd (&strm);
1334 || strm.avail_out != 0)
1335 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1336 bfd_get_filename (abfd), rc);
1338 do_cleanups (cleanup);
1339 *outbuf = uncompressed_buffer;
1340 *outsize = uncompressed_size;
1344 /* Read the contents of the section SECTP from object file specified by
1345 OBJFILE, store info about the section into INFO.
1346 If the section is compressed, uncompress it before returning. */
1349 dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info)
1351 bfd *abfd = objfile->obfd;
1352 asection *sectp = info->asection;
1353 gdb_byte *buf, *retbuf;
1354 unsigned char header[4];
1356 info->buffer = NULL;
1357 info->was_mmapped = 0;
1359 if (info->asection == NULL || info->size == 0)
1362 /* Check if the file has a 4-byte header indicating compression. */
1363 if (info->size > sizeof (header)
1364 && bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
1365 && bfd_bread (header, sizeof (header), abfd) == sizeof (header))
1367 /* Upon decompression, update the buffer and its size. */
1368 if (strncmp (header, "ZLIB", sizeof (header)) == 0)
1370 zlib_decompress_section (objfile, sectp, &info->buffer,
1378 pagesize = getpagesize ();
1380 /* Only try to mmap sections which are large enough: we don't want to
1381 waste space due to fragmentation. Also, only try mmap for sections
1382 without relocations. */
1384 if (info->size > 4 * pagesize && (sectp->flags & SEC_RELOC) == 0)
1386 off_t pg_offset = sectp->filepos & ~(pagesize - 1);
1387 size_t map_length = info->size + sectp->filepos - pg_offset;
1388 caddr_t retbuf = bfd_mmap (abfd, 0, map_length, PROT_READ,
1389 MAP_PRIVATE, pg_offset);
1391 if (retbuf != MAP_FAILED)
1393 info->was_mmapped = 1;
1394 info->buffer = retbuf + (sectp->filepos & (pagesize - 1)) ;
1400 /* If we get here, we are a normal, not-compressed section. */
1402 = obstack_alloc (&objfile->objfile_obstack, info->size);
1404 /* When debugging .o files, we may need to apply relocations; see
1405 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1406 We never compress sections in .o files, so we only need to
1407 try this when the section is not compressed. */
1408 retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
1411 info->buffer = retbuf;
1415 if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
1416 || bfd_bread (buf, info->size, abfd) != info->size)
1417 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1418 bfd_get_filename (abfd));
1421 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1425 dwarf2_get_section_info (struct objfile *objfile, const char *section_name,
1426 asection **sectp, gdb_byte **bufp,
1427 bfd_size_type *sizep)
1429 struct dwarf2_per_objfile *data
1430 = objfile_data (objfile, dwarf2_objfile_data_key);
1431 struct dwarf2_section_info *info;
1432 if (section_is_p (section_name, EH_FRAME_SECTION))
1433 info = &data->eh_frame;
1434 else if (section_is_p (section_name, FRAME_SECTION))
1435 info = &data->frame;
1439 if (info->asection != NULL && info->size != 0 && info->buffer == NULL)
1440 /* We haven't read this section in yet. Do it now. */
1441 dwarf2_read_section (objfile, info);
1443 *sectp = info->asection;
1444 *bufp = info->buffer;
1445 *sizep = info->size;
1448 /* Build a partial symbol table. */
1451 dwarf2_build_psymtabs (struct objfile *objfile)
1453 dwarf2_read_section (objfile, &dwarf2_per_objfile->info);
1454 dwarf2_read_section (objfile, &dwarf2_per_objfile->abbrev);
1455 dwarf2_read_section (objfile, &dwarf2_per_objfile->line);
1456 dwarf2_read_section (objfile, &dwarf2_per_objfile->str);
1457 dwarf2_read_section (objfile, &dwarf2_per_objfile->macinfo);
1458 dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges);
1459 dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
1460 dwarf2_read_section (objfile, &dwarf2_per_objfile->loc);
1461 dwarf2_read_section (objfile, &dwarf2_per_objfile->eh_frame);
1462 dwarf2_read_section (objfile, &dwarf2_per_objfile->frame);
1464 if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0)
1466 init_psymbol_list (objfile, 1024);
1470 if (dwarf_aranges_offset && dwarf_pubnames_offset)
1472 /* Things are significantly easier if we have .debug_aranges and
1473 .debug_pubnames sections */
1475 dwarf2_build_psymtabs_easy (objfile);
1479 /* only test this case for now */
1481 /* In this case we have to work a bit harder */
1482 dwarf2_build_psymtabs_hard (objfile);
1487 /* Build the partial symbol table from the information in the
1488 .debug_pubnames and .debug_aranges sections. */
1491 dwarf2_build_psymtabs_easy (struct objfile *objfile)
1493 bfd *abfd = objfile->obfd;
1494 char *aranges_buffer, *pubnames_buffer;
1495 char *aranges_ptr, *pubnames_ptr;
1496 unsigned int entry_length, version, info_offset, info_size;
1498 pubnames_buffer = dwarf2_read_section (objfile,
1499 dwarf_pubnames_section);
1500 pubnames_ptr = pubnames_buffer;
1501 while ((pubnames_ptr - pubnames_buffer) < dwarf2_per_objfile->pubnames.size)
1503 unsigned int bytes_read;
1505 entry_length = read_initial_length (abfd, pubnames_ptr, &bytes_read);
1506 pubnames_ptr += bytes_read;
1507 version = read_1_byte (abfd, pubnames_ptr);
1509 info_offset = read_4_bytes (abfd, pubnames_ptr);
1511 info_size = read_4_bytes (abfd, pubnames_ptr);
1515 aranges_buffer = dwarf2_read_section (objfile,
1516 dwarf_aranges_section);
1521 /* Return TRUE if OFFSET is within CU_HEADER. */
1524 offset_in_cu_p (const struct comp_unit_head *cu_header, unsigned int offset)
1526 unsigned int bottom = cu_header->offset;
1527 unsigned int top = (cu_header->offset
1529 + cu_header->initial_length_size);
1530 return (offset >= bottom && offset < top);
1533 /* Read in the comp unit header information from the debug_info at info_ptr.
1534 NOTE: This leaves members offset, first_die_offset to be filled in
1538 read_comp_unit_head (struct comp_unit_head *cu_header,
1539 gdb_byte *info_ptr, bfd *abfd)
1542 unsigned int bytes_read;
1544 cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read);
1545 cu_header->initial_length_size = bytes_read;
1546 cu_header->offset_size = (bytes_read == 4) ? 4 : 8;
1547 info_ptr += bytes_read;
1548 cu_header->version = read_2_bytes (abfd, info_ptr);
1550 cu_header->abbrev_offset = read_offset (abfd, info_ptr, cu_header,
1552 info_ptr += bytes_read;
1553 cu_header->addr_size = read_1_byte (abfd, info_ptr);
1555 signed_addr = bfd_get_sign_extend_vma (abfd);
1556 if (signed_addr < 0)
1557 internal_error (__FILE__, __LINE__,
1558 _("read_comp_unit_head: dwarf from non elf file"));
1559 cu_header->signed_addr_p = signed_addr;
1565 partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
1566 gdb_byte *buffer, unsigned int buffer_size,
1569 gdb_byte *beg_of_comp_unit = info_ptr;
1571 info_ptr = read_comp_unit_head (header, info_ptr, abfd);
1573 if (header->version != 2 && header->version != 3)
1574 error (_("Dwarf Error: wrong version in compilation unit header "
1575 "(is %d, should be %d) [in module %s]"), header->version,
1576 2, bfd_get_filename (abfd));
1578 if (header->abbrev_offset >= dwarf2_per_objfile->abbrev.size)
1579 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1580 "(offset 0x%lx + 6) [in module %s]"),
1581 (long) header->abbrev_offset,
1582 (long) (beg_of_comp_unit - buffer),
1583 bfd_get_filename (abfd));
1585 if (beg_of_comp_unit + header->length + header->initial_length_size
1586 > buffer + buffer_size)
1587 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1588 "(offset 0x%lx + 0) [in module %s]"),
1589 (long) header->length,
1590 (long) (beg_of_comp_unit - buffer),
1591 bfd_get_filename (abfd));
1596 /* Read in the types comp unit header information from .debug_types entry at
1597 types_ptr. The result is a pointer to one past the end of the header. */
1600 read_type_comp_unit_head (struct comp_unit_head *cu_header,
1601 ULONGEST *signature,
1602 gdb_byte *types_ptr, bfd *abfd)
1604 unsigned int bytes_read;
1605 gdb_byte *initial_types_ptr = types_ptr;
1607 cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
1609 types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
1611 *signature = read_8_bytes (abfd, types_ptr);
1613 types_ptr += cu_header->offset_size;
1614 cu_header->first_die_offset = types_ptr - initial_types_ptr;
1619 /* Allocate a new partial symtab for file named NAME and mark this new
1620 partial symtab as being an include of PST. */
1623 dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst,
1624 struct objfile *objfile)
1626 struct partial_symtab *subpst = allocate_psymtab (name, objfile);
1628 subpst->section_offsets = pst->section_offsets;
1629 subpst->textlow = 0;
1630 subpst->texthigh = 0;
1632 subpst->dependencies = (struct partial_symtab **)
1633 obstack_alloc (&objfile->objfile_obstack,
1634 sizeof (struct partial_symtab *));
1635 subpst->dependencies[0] = pst;
1636 subpst->number_of_dependencies = 1;
1638 subpst->globals_offset = 0;
1639 subpst->n_global_syms = 0;
1640 subpst->statics_offset = 0;
1641 subpst->n_static_syms = 0;
1642 subpst->symtab = NULL;
1643 subpst->read_symtab = pst->read_symtab;
1646 /* No private part is necessary for include psymtabs. This property
1647 can be used to differentiate between such include psymtabs and
1648 the regular ones. */
1649 subpst->read_symtab_private = NULL;
1652 /* Read the Line Number Program data and extract the list of files
1653 included by the source file represented by PST. Build an include
1654 partial symtab for each of these included files. */
1657 dwarf2_build_include_psymtabs (struct dwarf2_cu *cu,
1658 struct die_info *die,
1659 struct partial_symtab *pst)
1661 struct objfile *objfile = cu->objfile;
1662 bfd *abfd = objfile->obfd;
1663 struct line_header *lh = NULL;
1664 struct attribute *attr;
1666 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
1669 unsigned int line_offset = DW_UNSND (attr);
1670 lh = dwarf_decode_line_header (line_offset, abfd, cu);
1673 return; /* No linetable, so no includes. */
1675 dwarf_decode_lines (lh, NULL, abfd, cu, pst);
1677 free_line_header (lh);
1681 hash_type_signature (const void *item)
1683 const struct signatured_type *type_sig = item;
1684 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1685 return type_sig->signature;
1689 eq_type_signature (const void *item_lhs, const void *item_rhs)
1691 const struct signatured_type *lhs = item_lhs;
1692 const struct signatured_type *rhs = item_rhs;
1693 return lhs->signature == rhs->signature;
1696 /* Create the hash table of all entries in the .debug_types section.
1697 The result is zero if there is an error (e.g. missing .debug_types section),
1698 otherwise non-zero. */
1701 create_debug_types_hash_table (struct objfile *objfile)
1703 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer;
1706 if (info_ptr == NULL)
1708 dwarf2_per_objfile->signatured_types = NULL;
1712 types_htab = htab_create_alloc_ex (41,
1713 hash_type_signature,
1716 &objfile->objfile_obstack,
1717 hashtab_obstack_allocate,
1718 dummy_obstack_deallocate);
1720 if (dwarf2_die_debug)
1721 fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
1723 while (info_ptr < dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1725 unsigned int offset;
1726 unsigned int offset_size;
1727 unsigned int type_offset;
1728 unsigned int length, initial_length_size;
1729 unsigned short version;
1731 struct signatured_type *type_sig;
1733 gdb_byte *ptr = info_ptr;
1735 offset = ptr - dwarf2_per_objfile->types.buffer;
1737 /* We need to read the type's signature in order to build the hash
1738 table, but we don't need to read anything else just yet. */
1740 /* Sanity check to ensure entire cu is present. */
1741 length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
1742 if (ptr + length + initial_length_size
1743 > dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
1745 complaint (&symfile_complaints,
1746 _("debug type entry runs off end of `.debug_types' section, ignored"));
1750 offset_size = initial_length_size == 4 ? 4 : 8;
1751 ptr += initial_length_size;
1752 version = bfd_get_16 (objfile->obfd, ptr);
1754 ptr += offset_size; /* abbrev offset */
1755 ptr += 1; /* address size */
1756 signature = bfd_get_64 (objfile->obfd, ptr);
1758 type_offset = read_offset_1 (objfile->obfd, ptr, offset_size);
1760 type_sig = obstack_alloc (&objfile->objfile_obstack, sizeof (*type_sig));
1761 memset (type_sig, 0, sizeof (*type_sig));
1762 type_sig->signature = signature;
1763 type_sig->offset = offset;
1764 type_sig->type_offset = type_offset;
1766 slot = htab_find_slot (types_htab, type_sig, INSERT);
1767 gdb_assert (slot != NULL);
1770 if (dwarf2_die_debug)
1771 fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n",
1772 offset, phex (signature, sizeof (signature)));
1774 info_ptr = info_ptr + initial_length_size + length;
1777 dwarf2_per_objfile->signatured_types = types_htab;
1782 /* Lookup a signature based type.
1783 Returns NULL if SIG is not present in the table. */
1785 static struct signatured_type *
1786 lookup_signatured_type (struct objfile *objfile, ULONGEST sig)
1788 struct signatured_type find_entry, *entry;
1790 if (dwarf2_per_objfile->signatured_types == NULL)
1792 complaint (&symfile_complaints,
1793 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1797 find_entry.signature = sig;
1798 entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
1802 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1805 init_cu_die_reader (struct die_reader_specs *reader,
1806 struct dwarf2_cu *cu)
1808 reader->abfd = cu->objfile->obfd;
1810 if (cu->per_cu->from_debug_types)
1811 reader->buffer = dwarf2_per_objfile->types.buffer;
1813 reader->buffer = dwarf2_per_objfile->info.buffer;
1816 /* Find the base address of the compilation unit for range lists and
1817 location lists. It will normally be specified by DW_AT_low_pc.
1818 In DWARF-3 draft 4, the base address could be overridden by
1819 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1820 compilation units with discontinuous ranges. */
1823 dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu)
1825 struct attribute *attr;
1828 cu->base_address = 0;
1830 attr = dwarf2_attr (die, DW_AT_entry_pc, cu);
1833 cu->base_address = DW_ADDR (attr);
1838 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
1841 cu->base_address = DW_ADDR (attr);
1847 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1848 to combine the common parts.
1849 Process a compilation unit for a psymtab.
1850 BUFFER is a pointer to the beginning of the dwarf section buffer,
1851 either .debug_info or debug_types.
1852 INFO_PTR is a pointer to the start of the CU.
1853 Returns a pointer to the next CU. */
1856 process_psymtab_comp_unit (struct objfile *objfile,
1857 struct dwarf2_per_cu_data *this_cu,
1858 gdb_byte *buffer, gdb_byte *info_ptr,
1859 unsigned int buffer_size)
1861 bfd *abfd = objfile->obfd;
1862 gdb_byte *beg_of_comp_unit = info_ptr;
1863 struct die_info *comp_unit_die;
1864 struct partial_symtab *pst;
1866 struct cleanup *back_to_inner;
1867 struct dwarf2_cu cu;
1868 unsigned int bytes_read;
1869 int has_children, has_pc_info;
1870 struct attribute *attr;
1872 CORE_ADDR best_lowpc = 0, best_highpc = 0;
1873 struct die_reader_specs reader_specs;
1875 memset (&cu, 0, sizeof (cu));
1876 cu.objfile = objfile;
1877 obstack_init (&cu.comp_unit_obstack);
1879 back_to_inner = make_cleanup (free_stack_comp_unit, &cu);
1881 info_ptr = partial_read_comp_unit_head (&cu.header, info_ptr,
1882 buffer, buffer_size,
1885 /* Complete the cu_header. */
1886 cu.header.offset = beg_of_comp_unit - buffer;
1887 cu.header.first_die_offset = info_ptr - beg_of_comp_unit;
1889 cu.list_in_scope = &file_symbols;
1891 /* If this compilation unit was already read in, free the
1892 cached copy in order to read it in again. This is
1893 necessary because we skipped some symbols when we first
1894 read in the compilation unit (see load_partial_dies).
1895 This problem could be avoided, but the benefit is
1897 if (this_cu->cu != NULL)
1898 free_one_cached_comp_unit (this_cu->cu);
1900 /* Note that this is a pointer to our stack frame, being
1901 added to a global data structure. It will be cleaned up
1902 in free_stack_comp_unit when we finish with this
1903 compilation unit. */
1905 cu.per_cu = this_cu;
1907 /* Read the abbrevs for this compilation unit into a table. */
1908 dwarf2_read_abbrevs (abfd, &cu);
1909 make_cleanup (dwarf2_free_abbrev_table, &cu);
1911 /* Read the compilation unit die. */
1912 if (this_cu->from_debug_types)
1913 info_ptr += 8 /*signature*/ + cu.header.offset_size;
1914 init_cu_die_reader (&reader_specs, &cu);
1915 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
1918 if (this_cu->from_debug_types)
1920 /* offset,length haven't been set yet for type units. */
1921 this_cu->offset = cu.header.offset;
1922 this_cu->length = cu.header.length + cu.header.initial_length_size;
1924 else if (comp_unit_die->tag == DW_TAG_partial_unit)
1926 info_ptr = (beg_of_comp_unit + cu.header.length
1927 + cu.header.initial_length_size);
1928 do_cleanups (back_to_inner);
1932 /* Set the language we're debugging. */
1933 attr = dwarf2_attr (comp_unit_die, DW_AT_language, &cu);
1935 set_cu_language (DW_UNSND (attr), &cu);
1937 set_cu_language (language_minimal, &cu);
1939 /* Allocate a new partial symbol table structure. */
1940 attr = dwarf2_attr (comp_unit_die, DW_AT_name, &cu);
1941 pst = start_psymtab_common (objfile, objfile->section_offsets,
1942 (attr != NULL) ? DW_STRING (attr) : "",
1943 /* TEXTLOW and TEXTHIGH are set below. */
1945 objfile->global_psymbols.next,
1946 objfile->static_psymbols.next);
1948 attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, &cu);
1950 pst->dirname = DW_STRING (attr);
1952 pst->read_symtab_private = (char *) this_cu;
1954 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1956 /* Store the function that reads in the rest of the symbol table */
1957 pst->read_symtab = dwarf2_psymtab_to_symtab;
1959 this_cu->psymtab = pst;
1961 dwarf2_find_base_address (comp_unit_die, &cu);
1963 /* Possibly set the default values of LOWPC and HIGHPC from
1965 has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
1966 &best_highpc, &cu, pst);
1967 if (has_pc_info == 1 && best_lowpc < best_highpc)
1968 /* Store the contiguous range if it is not empty; it can be empty for
1969 CUs with no code. */
1970 addrmap_set_empty (objfile->psymtabs_addrmap,
1971 best_lowpc + baseaddr,
1972 best_highpc + baseaddr - 1, pst);
1974 /* Check if comp unit has_children.
1975 If so, read the rest of the partial symbols from this comp unit.
1976 If not, there's no more debug_info for this comp unit. */
1979 struct partial_die_info *first_die;
1980 CORE_ADDR lowpc, highpc;
1982 lowpc = ((CORE_ADDR) -1);
1983 highpc = ((CORE_ADDR) 0);
1985 first_die = load_partial_dies (abfd, buffer, info_ptr, 1, &cu);
1987 scan_partial_symbols (first_die, &lowpc, &highpc,
1988 ! has_pc_info, &cu);
1990 /* If we didn't find a lowpc, set it to highpc to avoid
1991 complaints from `maint check'. */
1992 if (lowpc == ((CORE_ADDR) -1))
1995 /* If the compilation unit didn't have an explicit address range,
1996 then use the information extracted from its child dies. */
2000 best_highpc = highpc;
2003 pst->textlow = best_lowpc + baseaddr;
2004 pst->texthigh = best_highpc + baseaddr;
2006 pst->n_global_syms = objfile->global_psymbols.next -
2007 (objfile->global_psymbols.list + pst->globals_offset);
2008 pst->n_static_syms = objfile->static_psymbols.next -
2009 (objfile->static_psymbols.list + pst->statics_offset);
2010 sort_pst_symbols (pst);
2012 /* If there is already a psymtab or symtab for a file of this
2013 name, remove it. (If there is a symtab, more drastic things
2014 also happen.) This happens in VxWorks. */
2015 if (! this_cu->from_debug_types)
2016 free_named_symtabs (pst->filename);
2018 info_ptr = (beg_of_comp_unit + cu.header.length
2019 + cu.header.initial_length_size);
2021 if (this_cu->from_debug_types)
2023 /* It's not clear we want to do anything with stmt lists here.
2024 Waiting to see what gcc ultimately does. */
2028 /* Get the list of files included in the current compilation unit,
2029 and build a psymtab for each of them. */
2030 dwarf2_build_include_psymtabs (&cu, comp_unit_die, pst);
2033 do_cleanups (back_to_inner);
2038 /* Traversal function for htab_traverse_noresize.
2039 Process one .debug_types comp-unit. */
2042 process_type_comp_unit (void **slot, void *info)
2044 struct signatured_type *entry = (struct signatured_type *) *slot;
2045 struct objfile *objfile = (struct objfile *) info;
2046 struct dwarf2_per_cu_data *this_cu;
2048 this_cu = &entry->per_cu;
2049 this_cu->from_debug_types = 1;
2051 process_psymtab_comp_unit (objfile, this_cu,
2052 dwarf2_per_objfile->types.buffer,
2053 dwarf2_per_objfile->types.buffer + entry->offset,
2054 dwarf2_per_objfile->types.size);
2059 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2060 Build partial symbol tables for the .debug_types comp-units. */
2063 build_type_psymtabs (struct objfile *objfile)
2065 if (! create_debug_types_hash_table (objfile))
2068 htab_traverse_noresize (dwarf2_per_objfile->signatured_types,
2069 process_type_comp_unit, objfile);
2072 /* Build the partial symbol table by doing a quick pass through the
2073 .debug_info and .debug_abbrev sections. */
2076 dwarf2_build_psymtabs_hard (struct objfile *objfile)
2078 /* Instead of reading this into a big buffer, we should probably use
2079 mmap() on architectures that support it. (FIXME) */
2080 bfd *abfd = objfile->obfd;
2082 struct cleanup *back_to;
2084 info_ptr = dwarf2_per_objfile->info.buffer;
2086 /* Any cached compilation units will be linked by the per-objfile
2087 read_in_chain. Make sure to free them when we're done. */
2088 back_to = make_cleanup (free_cached_comp_units, NULL);
2090 build_type_psymtabs (objfile);
2092 create_all_comp_units (objfile);
2094 objfile->psymtabs_addrmap =
2095 addrmap_create_mutable (&objfile->objfile_obstack);
2097 /* Since the objects we're extracting from .debug_info vary in
2098 length, only the individual functions to extract them (like
2099 read_comp_unit_head and load_partial_die) can really know whether
2100 the buffer is large enough to hold another complete object.
2102 At the moment, they don't actually check that. If .debug_info
2103 holds just one extra byte after the last compilation unit's dies,
2104 then read_comp_unit_head will happily read off the end of the
2105 buffer. read_partial_die is similarly casual. Those functions
2108 For this loop condition, simply checking whether there's any data
2109 left at all should be sufficient. */
2111 while (info_ptr < (dwarf2_per_objfile->info.buffer
2112 + dwarf2_per_objfile->info.size))
2114 struct dwarf2_per_cu_data *this_cu;
2116 this_cu = dwarf2_find_comp_unit (info_ptr - dwarf2_per_objfile->info.buffer,
2119 info_ptr = process_psymtab_comp_unit (objfile, this_cu,
2120 dwarf2_per_objfile->info.buffer,
2122 dwarf2_per_objfile->info.size);
2125 objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap,
2126 &objfile->objfile_obstack);
2128 do_cleanups (back_to);
2131 /* Load the partial DIEs for a secondary CU into memory. */
2134 load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
2135 struct objfile *objfile)
2137 bfd *abfd = objfile->obfd;
2138 gdb_byte *info_ptr, *beg_of_comp_unit;
2139 struct die_info *comp_unit_die;
2140 struct dwarf2_cu *cu;
2141 unsigned int bytes_read;
2142 struct cleanup *back_to;
2143 struct attribute *attr;
2145 struct die_reader_specs reader_specs;
2147 gdb_assert (! this_cu->from_debug_types);
2149 info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
2150 beg_of_comp_unit = info_ptr;
2152 cu = alloc_one_comp_unit (objfile);
2154 /* ??? Missing cleanup for CU? */
2156 /* Link this compilation unit into the compilation unit tree. */
2158 cu->per_cu = this_cu;
2159 cu->type_hash = this_cu->type_hash;
2161 info_ptr = partial_read_comp_unit_head (&cu->header, info_ptr,
2162 dwarf2_per_objfile->info.buffer,
2163 dwarf2_per_objfile->info.size,
2166 /* Complete the cu_header. */
2167 cu->header.offset = this_cu->offset;
2168 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
2170 /* Read the abbrevs for this compilation unit into a table. */
2171 dwarf2_read_abbrevs (abfd, cu);
2172 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
2174 /* Read the compilation unit die. */
2175 init_cu_die_reader (&reader_specs, cu);
2176 info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
2179 /* Set the language we're debugging. */
2180 attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu);
2182 set_cu_language (DW_UNSND (attr), cu);
2184 set_cu_language (language_minimal, cu);
2186 /* Check if comp unit has_children.
2187 If so, read the rest of the partial symbols from this comp unit.
2188 If not, there's no more debug_info for this comp unit. */
2190 load_partial_dies (abfd, dwarf2_per_objfile->info.buffer, info_ptr, 0, cu);
2192 do_cleanups (back_to);
2195 /* Create a list of all compilation units in OBJFILE. We do this only
2196 if an inter-comp-unit reference is found; presumably if there is one,
2197 there will be many, and one will occur early in the .debug_info section.
2198 So there's no point in building this list incrementally. */
2201 create_all_comp_units (struct objfile *objfile)
2205 struct dwarf2_per_cu_data **all_comp_units;
2206 gdb_byte *info_ptr = dwarf2_per_objfile->info.buffer;
2210 all_comp_units = xmalloc (n_allocated
2211 * sizeof (struct dwarf2_per_cu_data *));
2213 while (info_ptr < dwarf2_per_objfile->info.buffer + dwarf2_per_objfile->info.size)
2215 unsigned int length, initial_length_size;
2216 gdb_byte *beg_of_comp_unit;
2217 struct dwarf2_per_cu_data *this_cu;
2218 unsigned int offset;
2220 offset = info_ptr - dwarf2_per_objfile->info.buffer;
2222 /* Read just enough information to find out where the next
2223 compilation unit is. */
2224 length = read_initial_length (objfile->obfd, info_ptr,
2225 &initial_length_size);
2227 /* Save the compilation unit for later lookup. */
2228 this_cu = obstack_alloc (&objfile->objfile_obstack,
2229 sizeof (struct dwarf2_per_cu_data));
2230 memset (this_cu, 0, sizeof (*this_cu));
2231 this_cu->offset = offset;
2232 this_cu->length = length + initial_length_size;
2234 if (n_comp_units == n_allocated)
2237 all_comp_units = xrealloc (all_comp_units,
2239 * sizeof (struct dwarf2_per_cu_data *));
2241 all_comp_units[n_comp_units++] = this_cu;
2243 info_ptr = info_ptr + this_cu->length;
2246 dwarf2_per_objfile->all_comp_units
2247 = obstack_alloc (&objfile->objfile_obstack,
2248 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2249 memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units,
2250 n_comp_units * sizeof (struct dwarf2_per_cu_data *));
2251 xfree (all_comp_units);
2252 dwarf2_per_objfile->n_comp_units = n_comp_units;
2255 /* Process all loaded DIEs for compilation unit CU, starting at
2256 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2257 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2258 DW_AT_ranges). If NEED_PC is set, then this function will set
2259 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2260 and record the covered ranges in the addrmap. */
2263 scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
2264 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2266 struct objfile *objfile = cu->objfile;
2267 bfd *abfd = objfile->obfd;
2268 struct partial_die_info *pdi;
2270 /* Now, march along the PDI's, descending into ones which have
2271 interesting children but skipping the children of the other ones,
2272 until we reach the end of the compilation unit. */
2278 fixup_partial_die (pdi, cu);
2280 /* Anonymous namespaces have no name but have interesting
2281 children, so we need to look at them. Ditto for anonymous
2284 if (pdi->name != NULL || pdi->tag == DW_TAG_namespace
2285 || pdi->tag == DW_TAG_enumeration_type)
2289 case DW_TAG_subprogram:
2290 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2292 case DW_TAG_variable:
2293 case DW_TAG_typedef:
2294 case DW_TAG_union_type:
2295 if (!pdi->is_declaration)
2297 add_partial_symbol (pdi, cu);
2300 case DW_TAG_class_type:
2301 case DW_TAG_interface_type:
2302 case DW_TAG_structure_type:
2303 if (!pdi->is_declaration)
2305 add_partial_symbol (pdi, cu);
2308 case DW_TAG_enumeration_type:
2309 if (!pdi->is_declaration)
2310 add_partial_enumeration (pdi, cu);
2312 case DW_TAG_base_type:
2313 case DW_TAG_subrange_type:
2314 /* File scope base type definitions are added to the partial
2316 add_partial_symbol (pdi, cu);
2318 case DW_TAG_namespace:
2319 add_partial_namespace (pdi, lowpc, highpc, need_pc, cu);
2322 add_partial_module (pdi, lowpc, highpc, need_pc, cu);
2329 /* If the die has a sibling, skip to the sibling. */
2331 pdi = pdi->die_sibling;
2335 /* Functions used to compute the fully scoped name of a partial DIE.
2337 Normally, this is simple. For C++, the parent DIE's fully scoped
2338 name is concatenated with "::" and the partial DIE's name. For
2339 Java, the same thing occurs except that "." is used instead of "::".
2340 Enumerators are an exception; they use the scope of their parent
2341 enumeration type, i.e. the name of the enumeration type is not
2342 prepended to the enumerator.
2344 There are two complexities. One is DW_AT_specification; in this
2345 case "parent" means the parent of the target of the specification,
2346 instead of the direct parent of the DIE. The other is compilers
2347 which do not emit DW_TAG_namespace; in this case we try to guess
2348 the fully qualified name of structure types from their members'
2349 linkage names. This must be done using the DIE's children rather
2350 than the children of any DW_AT_specification target. We only need
2351 to do this for structures at the top level, i.e. if the target of
2352 any DW_AT_specification (if any; otherwise the DIE itself) does not
2355 /* Compute the scope prefix associated with PDI's parent, in
2356 compilation unit CU. The result will be allocated on CU's
2357 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2358 field. NULL is returned if no prefix is necessary. */
2360 partial_die_parent_scope (struct partial_die_info *pdi,
2361 struct dwarf2_cu *cu)
2363 char *grandparent_scope;
2364 struct partial_die_info *parent, *real_pdi;
2366 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2367 then this means the parent of the specification DIE. */
2370 while (real_pdi->has_specification)
2371 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2373 parent = real_pdi->die_parent;
2377 if (parent->scope_set)
2378 return parent->scope;
2380 fixup_partial_die (parent, cu);
2382 grandparent_scope = partial_die_parent_scope (parent, cu);
2384 if (parent->tag == DW_TAG_namespace
2385 || parent->tag == DW_TAG_structure_type
2386 || parent->tag == DW_TAG_class_type
2387 || parent->tag == DW_TAG_interface_type
2388 || parent->tag == DW_TAG_union_type)
2390 if (grandparent_scope == NULL)
2391 parent->scope = parent->name;
2393 parent->scope = typename_concat (&cu->comp_unit_obstack, grandparent_scope,
2396 else if (parent->tag == DW_TAG_enumeration_type)
2397 /* Enumerators should not get the name of the enumeration as a prefix. */
2398 parent->scope = grandparent_scope;
2401 /* FIXME drow/2004-04-01: What should we be doing with
2402 function-local names? For partial symbols, we should probably be
2404 complaint (&symfile_complaints,
2405 _("unhandled containing DIE tag %d for DIE at %d"),
2406 parent->tag, pdi->offset);
2407 parent->scope = grandparent_scope;
2410 parent->scope_set = 1;
2411 return parent->scope;
2414 /* Return the fully scoped name associated with PDI, from compilation unit
2415 CU. The result will be allocated with malloc. */
2417 partial_die_full_name (struct partial_die_info *pdi,
2418 struct dwarf2_cu *cu)
2422 parent_scope = partial_die_parent_scope (pdi, cu);
2423 if (parent_scope == NULL)
2426 return typename_concat (NULL, parent_scope, pdi->name, cu);
2430 add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu)
2432 struct objfile *objfile = cu->objfile;
2434 char *actual_name = NULL;
2435 const char *my_prefix;
2436 const struct partial_symbol *psym = NULL;
2438 int built_actual_name = 0;
2440 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2442 if (pdi_needs_namespace (pdi->tag))
2444 actual_name = partial_die_full_name (pdi, cu);
2446 built_actual_name = 1;
2449 if (actual_name == NULL)
2450 actual_name = pdi->name;
2454 case DW_TAG_subprogram:
2455 if (pdi->is_external || cu->language == language_ada)
2457 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2458 of the global scope. But in Ada, we want to be able to access
2459 nested procedures globally. So all Ada subprograms are stored
2460 in the global scope. */
2461 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2462 mst_text, objfile); */
2463 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2465 VAR_DOMAIN, LOC_BLOCK,
2466 &objfile->global_psymbols,
2467 0, pdi->lowpc + baseaddr,
2468 cu->language, objfile);
2472 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2473 mst_file_text, objfile); */
2474 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2476 VAR_DOMAIN, LOC_BLOCK,
2477 &objfile->static_psymbols,
2478 0, pdi->lowpc + baseaddr,
2479 cu->language, objfile);
2482 case DW_TAG_variable:
2483 if (pdi->is_external)
2486 Don't enter into the minimal symbol tables as there is
2487 a minimal symbol table entry from the ELF symbols already.
2488 Enter into partial symbol table if it has a location
2489 descriptor or a type.
2490 If the location descriptor is missing, new_symbol will create
2491 a LOC_UNRESOLVED symbol, the address of the variable will then
2492 be determined from the minimal symbol table whenever the variable
2494 The address for the partial symbol table entry is not
2495 used by GDB, but it comes in handy for debugging partial symbol
2499 addr = decode_locdesc (pdi->locdesc, cu);
2500 if (pdi->locdesc || pdi->has_type)
2501 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2503 VAR_DOMAIN, LOC_STATIC,
2504 &objfile->global_psymbols,
2506 cu->language, objfile);
2510 /* Static Variable. Skip symbols without location descriptors. */
2511 if (pdi->locdesc == NULL)
2513 if (built_actual_name)
2514 xfree (actual_name);
2517 addr = decode_locdesc (pdi->locdesc, cu);
2518 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2519 mst_file_data, objfile); */
2520 psym = add_psymbol_to_list (actual_name, strlen (actual_name),
2522 VAR_DOMAIN, LOC_STATIC,
2523 &objfile->static_psymbols,
2525 cu->language, objfile);
2528 case DW_TAG_typedef:
2529 case DW_TAG_base_type:
2530 case DW_TAG_subrange_type:
2531 add_psymbol_to_list (actual_name, strlen (actual_name),
2533 VAR_DOMAIN, LOC_TYPEDEF,
2534 &objfile->static_psymbols,
2535 0, (CORE_ADDR) 0, cu->language, objfile);
2537 case DW_TAG_namespace:
2538 add_psymbol_to_list (actual_name, strlen (actual_name),
2540 VAR_DOMAIN, LOC_TYPEDEF,
2541 &objfile->global_psymbols,
2542 0, (CORE_ADDR) 0, cu->language, objfile);
2544 case DW_TAG_class_type:
2545 case DW_TAG_interface_type:
2546 case DW_TAG_structure_type:
2547 case DW_TAG_union_type:
2548 case DW_TAG_enumeration_type:
2549 /* Skip external references. The DWARF standard says in the section
2550 about "Structure, Union, and Class Type Entries": "An incomplete
2551 structure, union or class type is represented by a structure,
2552 union or class entry that does not have a byte size attribute
2553 and that has a DW_AT_declaration attribute." */
2554 if (!pdi->has_byte_size && pdi->is_declaration)
2556 if (built_actual_name)
2557 xfree (actual_name);
2561 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2562 static vs. global. */
2563 add_psymbol_to_list (actual_name, strlen (actual_name),
2565 STRUCT_DOMAIN, LOC_TYPEDEF,
2566 (cu->language == language_cplus
2567 || cu->language == language_java)
2568 ? &objfile->global_psymbols
2569 : &objfile->static_psymbols,
2570 0, (CORE_ADDR) 0, cu->language, objfile);
2573 case DW_TAG_enumerator:
2574 add_psymbol_to_list (actual_name, strlen (actual_name),
2576 VAR_DOMAIN, LOC_CONST,
2577 (cu->language == language_cplus
2578 || cu->language == language_java)
2579 ? &objfile->global_psymbols
2580 : &objfile->static_psymbols,
2581 0, (CORE_ADDR) 0, cu->language, objfile);
2587 /* Check to see if we should scan the name for possible namespace
2588 info. Only do this if this is C++, if we don't have namespace
2589 debugging info in the file, if the psym is of an appropriate type
2590 (otherwise we'll have psym == NULL), and if we actually had a
2591 mangled name to begin with. */
2593 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2594 cases which do not set PSYM above? */
2596 if (cu->language == language_cplus
2597 && cu->has_namespace_info == 0
2599 && SYMBOL_CPLUS_DEMANGLED_NAME (psym) != NULL)
2600 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym),
2603 if (built_actual_name)
2604 xfree (actual_name);
2607 /* Determine whether a die of type TAG living in a C++ class or
2608 namespace needs to have the name of the scope prepended to the
2609 name listed in the die. */
2612 pdi_needs_namespace (enum dwarf_tag tag)
2616 case DW_TAG_namespace:
2617 case DW_TAG_typedef:
2618 case DW_TAG_class_type:
2619 case DW_TAG_interface_type:
2620 case DW_TAG_structure_type:
2621 case DW_TAG_union_type:
2622 case DW_TAG_enumeration_type:
2623 case DW_TAG_enumerator:
2630 /* Read a partial die corresponding to a namespace; also, add a symbol
2631 corresponding to that namespace to the symbol table. NAMESPACE is
2632 the name of the enclosing namespace. */
2635 add_partial_namespace (struct partial_die_info *pdi,
2636 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2637 int need_pc, struct dwarf2_cu *cu)
2639 struct objfile *objfile = cu->objfile;
2641 /* Add a symbol for the namespace. */
2643 add_partial_symbol (pdi, cu);
2645 /* Now scan partial symbols in that namespace. */
2647 if (pdi->has_children)
2648 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2651 /* Read a partial die corresponding to a Fortran module. */
2654 add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc,
2655 CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu)
2657 /* Now scan partial symbols in that module.
2659 FIXME: Support the separate Fortran module namespaces. */
2661 if (pdi->has_children)
2662 scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu);
2665 /* Read a partial die corresponding to a subprogram and create a partial
2666 symbol for that subprogram. When the CU language allows it, this
2667 routine also defines a partial symbol for each nested subprogram
2668 that this subprogram contains.
2670 DIE my also be a lexical block, in which case we simply search
2671 recursively for suprograms defined inside that lexical block.
2672 Again, this is only performed when the CU language allows this
2673 type of definitions. */
2676 add_partial_subprogram (struct partial_die_info *pdi,
2677 CORE_ADDR *lowpc, CORE_ADDR *highpc,
2678 int need_pc, struct dwarf2_cu *cu)
2680 if (pdi->tag == DW_TAG_subprogram)
2682 if (pdi->has_pc_info)
2684 if (pdi->lowpc < *lowpc)
2685 *lowpc = pdi->lowpc;
2686 if (pdi->highpc > *highpc)
2687 *highpc = pdi->highpc;
2691 struct objfile *objfile = cu->objfile;
2693 baseaddr = ANOFFSET (objfile->section_offsets,
2694 SECT_OFF_TEXT (objfile));
2695 addrmap_set_empty (objfile->psymtabs_addrmap,
2696 pdi->lowpc, pdi->highpc - 1,
2697 cu->per_cu->psymtab);
2699 if (!pdi->is_declaration)
2700 add_partial_symbol (pdi, cu);
2704 if (! pdi->has_children)
2707 if (cu->language == language_ada)
2709 pdi = pdi->die_child;
2712 fixup_partial_die (pdi, cu);
2713 if (pdi->tag == DW_TAG_subprogram
2714 || pdi->tag == DW_TAG_lexical_block)
2715 add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu);
2716 pdi = pdi->die_sibling;
2721 /* See if we can figure out if the class lives in a namespace. We do
2722 this by looking for a member function; its demangled name will
2723 contain namespace info, if there is any. */
2726 guess_structure_name (struct partial_die_info *struct_pdi,
2727 struct dwarf2_cu *cu)
2729 if ((cu->language == language_cplus
2730 || cu->language == language_java)
2731 && cu->has_namespace_info == 0
2732 && struct_pdi->has_children)
2734 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2735 what template types look like, because the demangler
2736 frequently doesn't give the same name as the debug info. We
2737 could fix this by only using the demangled name to get the
2738 prefix (but see comment in read_structure_type). */
2740 struct partial_die_info *child_pdi = struct_pdi->die_child;
2741 struct partial_die_info *real_pdi;
2743 /* If this DIE (this DIE's specification, if any) has a parent, then
2744 we should not do this. We'll prepend the parent's fully qualified
2745 name when we create the partial symbol. */
2747 real_pdi = struct_pdi;
2748 while (real_pdi->has_specification)
2749 real_pdi = find_partial_die (real_pdi->spec_offset, cu);
2751 if (real_pdi->die_parent != NULL)
2754 while (child_pdi != NULL)
2756 if (child_pdi->tag == DW_TAG_subprogram)
2758 char *actual_class_name
2759 = language_class_name_from_physname (cu->language_defn,
2761 if (actual_class_name != NULL)
2764 = obsavestring (actual_class_name,
2765 strlen (actual_class_name),
2766 &cu->comp_unit_obstack);
2767 xfree (actual_class_name);
2772 child_pdi = child_pdi->die_sibling;
2777 /* Read a partial die corresponding to an enumeration type. */
2780 add_partial_enumeration (struct partial_die_info *enum_pdi,
2781 struct dwarf2_cu *cu)
2783 struct objfile *objfile = cu->objfile;
2784 bfd *abfd = objfile->obfd;
2785 struct partial_die_info *pdi;
2787 if (enum_pdi->name != NULL)
2788 add_partial_symbol (enum_pdi, cu);
2790 pdi = enum_pdi->die_child;
2793 if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL)
2794 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
2796 add_partial_symbol (pdi, cu);
2797 pdi = pdi->die_sibling;
2801 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2802 Return the corresponding abbrev, or NULL if the number is zero (indicating
2803 an empty DIE). In either case *BYTES_READ will be set to the length of
2804 the initial number. */
2806 static struct abbrev_info *
2807 peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read,
2808 struct dwarf2_cu *cu)
2810 bfd *abfd = cu->objfile->obfd;
2811 unsigned int abbrev_number;
2812 struct abbrev_info *abbrev;
2814 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read);
2816 if (abbrev_number == 0)
2819 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
2822 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number,
2823 bfd_get_filename (abfd));
2829 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2830 Returns a pointer to the end of a series of DIEs, terminated by an empty
2831 DIE. Any children of the skipped DIEs will also be skipped. */
2834 skip_children (gdb_byte *buffer, gdb_byte *info_ptr, struct dwarf2_cu *cu)
2836 struct abbrev_info *abbrev;
2837 unsigned int bytes_read;
2841 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
2843 return info_ptr + bytes_read;
2845 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
2849 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2850 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2851 abbrev corresponding to that skipped uleb128 should be passed in
2852 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2856 skip_one_die (gdb_byte *buffer, gdb_byte *info_ptr,
2857 struct abbrev_info *abbrev, struct dwarf2_cu *cu)
2859 unsigned int bytes_read;
2860 struct attribute attr;
2861 bfd *abfd = cu->objfile->obfd;
2862 unsigned int form, i;
2864 for (i = 0; i < abbrev->num_attrs; i++)
2866 /* The only abbrev we care about is DW_AT_sibling. */
2867 if (abbrev->attrs[i].name == DW_AT_sibling)
2869 read_attribute (&attr, &abbrev->attrs[i],
2870 abfd, info_ptr, cu);
2871 if (attr.form == DW_FORM_ref_addr)
2872 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
2874 return buffer + dwarf2_get_ref_die_offset (&attr);
2877 /* If it isn't DW_AT_sibling, skip this attribute. */
2878 form = abbrev->attrs[i].form;
2883 case DW_FORM_ref_addr:
2884 info_ptr += cu->header.addr_size;
2904 case DW_FORM_string:
2905 read_string (abfd, info_ptr, &bytes_read);
2906 info_ptr += bytes_read;
2909 info_ptr += cu->header.offset_size;
2912 info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2913 info_ptr += bytes_read;
2915 case DW_FORM_block1:
2916 info_ptr += 1 + read_1_byte (abfd, info_ptr);
2918 case DW_FORM_block2:
2919 info_ptr += 2 + read_2_bytes (abfd, info_ptr);
2921 case DW_FORM_block4:
2922 info_ptr += 4 + read_4_bytes (abfd, info_ptr);
2926 case DW_FORM_ref_udata:
2927 info_ptr = skip_leb128 (abfd, info_ptr);
2929 case DW_FORM_indirect:
2930 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
2931 info_ptr += bytes_read;
2932 /* We need to continue parsing from here, so just go back to
2934 goto skip_attribute;
2937 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2938 dwarf_form_name (form),
2939 bfd_get_filename (abfd));
2943 if (abbrev->has_children)
2944 return skip_children (buffer, info_ptr, cu);
2949 /* Locate ORIG_PDI's sibling.
2950 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2954 locate_pdi_sibling (struct partial_die_info *orig_pdi,
2955 gdb_byte *buffer, gdb_byte *info_ptr,
2956 bfd *abfd, struct dwarf2_cu *cu)
2958 /* Do we know the sibling already? */
2960 if (orig_pdi->sibling)
2961 return orig_pdi->sibling;
2963 /* Are there any children to deal with? */
2965 if (!orig_pdi->has_children)
2968 /* Skip the children the long way. */
2970 return skip_children (buffer, info_ptr, cu);
2973 /* Expand this partial symbol table into a full symbol table. */
2976 dwarf2_psymtab_to_symtab (struct partial_symtab *pst)
2978 /* FIXME: This is barely more than a stub. */
2983 warning (_("bug: psymtab for %s is already read in."), pst->filename);
2989 printf_filtered (_("Reading in symbols for %s..."), pst->filename);
2990 gdb_flush (gdb_stdout);
2993 /* Restore our global data. */
2994 dwarf2_per_objfile = objfile_data (pst->objfile,
2995 dwarf2_objfile_data_key);
2997 /* If this psymtab is constructed from a debug-only objfile, the
2998 has_section_at_zero flag will not necessarily be correct. We
2999 can get the correct value for this flag by looking at the data
3000 associated with the (presumably stripped) associated objfile. */
3001 if (pst->objfile->separate_debug_objfile_backlink)
3003 struct dwarf2_per_objfile *dpo_backlink
3004 = objfile_data (pst->objfile->separate_debug_objfile_backlink,
3005 dwarf2_objfile_data_key);
3006 dwarf2_per_objfile->has_section_at_zero
3007 = dpo_backlink->has_section_at_zero;
3010 psymtab_to_symtab_1 (pst);
3012 /* Finish up the debug error message. */
3014 printf_filtered (_("done.\n"));
3019 /* Add PER_CU to the queue. */
3022 queue_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3024 struct dwarf2_queue_item *item;
3027 item = xmalloc (sizeof (*item));
3028 item->per_cu = per_cu;
3031 if (dwarf2_queue == NULL)
3032 dwarf2_queue = item;
3034 dwarf2_queue_tail->next = item;
3036 dwarf2_queue_tail = item;
3039 /* Process the queue. */
3042 process_queue (struct objfile *objfile)
3044 struct dwarf2_queue_item *item, *next_item;
3046 /* The queue starts out with one item, but following a DIE reference
3047 may load a new CU, adding it to the end of the queue. */
3048 for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item)
3050 if (item->per_cu->psymtab && !item->per_cu->psymtab->readin)
3051 process_full_comp_unit (item->per_cu);
3053 item->per_cu->queued = 0;
3054 next_item = item->next;
3058 dwarf2_queue_tail = NULL;
3061 /* Free all allocated queue entries. This function only releases anything if
3062 an error was thrown; if the queue was processed then it would have been
3063 freed as we went along. */
3066 dwarf2_release_queue (void *dummy)
3068 struct dwarf2_queue_item *item, *last;
3070 item = dwarf2_queue;
3073 /* Anything still marked queued is likely to be in an
3074 inconsistent state, so discard it. */
3075 if (item->per_cu->queued)
3077 if (item->per_cu->cu != NULL)
3078 free_one_cached_comp_unit (item->per_cu->cu);
3079 item->per_cu->queued = 0;
3087 dwarf2_queue = dwarf2_queue_tail = NULL;
3090 /* Read in full symbols for PST, and anything it depends on. */
3093 psymtab_to_symtab_1 (struct partial_symtab *pst)
3095 struct dwarf2_per_cu_data *per_cu;
3096 struct cleanup *back_to;
3099 for (i = 0; i < pst->number_of_dependencies; i++)
3100 if (!pst->dependencies[i]->readin)
3102 /* Inform about additional files that need to be read in. */
3105 /* FIXME: i18n: Need to make this a single string. */
3106 fputs_filtered (" ", gdb_stdout);
3108 fputs_filtered ("and ", gdb_stdout);
3110 printf_filtered ("%s...", pst->dependencies[i]->filename);
3111 wrap_here (""); /* Flush output */
3112 gdb_flush (gdb_stdout);
3114 psymtab_to_symtab_1 (pst->dependencies[i]);
3117 per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private;
3121 /* It's an include file, no symbols to read for it.
3122 Everything is in the parent symtab. */
3127 back_to = make_cleanup (dwarf2_release_queue, NULL);
3129 queue_comp_unit (per_cu, pst->objfile);
3131 if (per_cu->from_debug_types)
3132 read_signatured_type_at_offset (pst->objfile, per_cu->offset);
3134 load_full_comp_unit (per_cu, pst->objfile);
3136 process_queue (pst->objfile);
3138 /* Age the cache, releasing compilation units that have not
3139 been used recently. */
3140 age_cached_comp_units ();
3142 do_cleanups (back_to);
3145 /* Load the DIEs associated with PER_CU into memory. */
3148 load_full_comp_unit (struct dwarf2_per_cu_data *per_cu, struct objfile *objfile)
3150 bfd *abfd = objfile->obfd;
3151 struct dwarf2_cu *cu;
3152 unsigned int offset;
3153 gdb_byte *info_ptr, *beg_of_comp_unit;
3154 struct cleanup *back_to, *free_cu_cleanup;
3155 struct attribute *attr;
3158 gdb_assert (! per_cu->from_debug_types);
3160 /* Set local variables from the partial symbol table info. */
3161 offset = per_cu->offset;
3163 info_ptr = dwarf2_per_objfile->info.buffer + offset;
3164 beg_of_comp_unit = info_ptr;
3166 cu = alloc_one_comp_unit (objfile);
3168 /* If an error occurs while loading, release our storage. */
3169 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
3171 /* Read in the comp_unit header. */
3172 info_ptr = read_comp_unit_head (&cu->header, info_ptr, abfd);
3174 /* Complete the cu_header. */
3175 cu->header.offset = offset;
3176 cu->header.first_die_offset = info_ptr - beg_of_comp_unit;
3178 /* Read the abbrevs for this compilation unit. */
3179 dwarf2_read_abbrevs (abfd, cu);
3180 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
3182 /* Link this compilation unit into the compilation unit tree. */
3184 cu->per_cu = per_cu;
3185 cu->type_hash = per_cu->type_hash;
3187 cu->dies = read_comp_unit (info_ptr, cu);
3189 /* We try not to read any attributes in this function, because not
3190 all objfiles needed for references have been loaded yet, and symbol
3191 table processing isn't initialized. But we have to set the CU language,
3192 or we won't be able to build types correctly. */
3193 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
3195 set_cu_language (DW_UNSND (attr), cu);
3197 set_cu_language (language_minimal, cu);
3199 /* Link this CU into read_in_chain. */
3200 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
3201 dwarf2_per_objfile->read_in_chain = per_cu;
3203 do_cleanups (back_to);
3205 /* We've successfully allocated this compilation unit. Let our caller
3206 clean it up when finished with it. */
3207 discard_cleanups (free_cu_cleanup);
3210 /* Generate full symbol information for PST and CU, whose DIEs have
3211 already been loaded into memory. */
3214 process_full_comp_unit (struct dwarf2_per_cu_data *per_cu)
3216 struct partial_symtab *pst = per_cu->psymtab;
3217 struct dwarf2_cu *cu = per_cu->cu;
3218 struct objfile *objfile = pst->objfile;
3219 bfd *abfd = objfile->obfd;
3220 CORE_ADDR lowpc, highpc;
3221 struct symtab *symtab;
3222 struct cleanup *back_to;
3225 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3228 back_to = make_cleanup (really_free_pendings, NULL);
3230 cu->list_in_scope = &file_symbols;
3232 dwarf2_find_base_address (cu->dies, cu);
3234 /* Do line number decoding in read_file_scope () */
3235 process_die (cu->dies, cu);
3237 /* Some compilers don't define a DW_AT_high_pc attribute for the
3238 compilation unit. If the DW_AT_high_pc is missing, synthesize
3239 it, by scanning the DIE's below the compilation unit. */
3240 get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu);
3242 symtab = end_symtab (highpc + baseaddr, objfile, SECT_OFF_TEXT (objfile));
3244 /* Set symtab language to language from DW_AT_language.
3245 If the compilation is from a C file generated by language preprocessors,
3246 do not set the language if it was already deduced by start_subfile. */
3248 && !(cu->language == language_c && symtab->language != language_c))
3250 symtab->language = cu->language;
3252 pst->symtab = symtab;
3255 do_cleanups (back_to);
3258 /* Process a die and its children. */
3261 process_die (struct die_info *die, struct dwarf2_cu *cu)
3265 case DW_TAG_padding:
3267 case DW_TAG_compile_unit:
3268 read_file_scope (die, cu);
3270 case DW_TAG_type_unit:
3271 read_type_unit_scope (die, cu);
3273 case DW_TAG_subprogram:
3274 case DW_TAG_inlined_subroutine:
3275 read_func_scope (die, cu);
3277 case DW_TAG_lexical_block:
3278 case DW_TAG_try_block:
3279 case DW_TAG_catch_block:
3280 read_lexical_block_scope (die, cu);
3282 case DW_TAG_class_type:
3283 case DW_TAG_interface_type:
3284 case DW_TAG_structure_type:
3285 case DW_TAG_union_type:
3286 process_structure_scope (die, cu);
3288 case DW_TAG_enumeration_type:
3289 process_enumeration_scope (die, cu);
3292 /* These dies have a type, but processing them does not create
3293 a symbol or recurse to process the children. Therefore we can
3294 read them on-demand through read_type_die. */
3295 case DW_TAG_subroutine_type:
3296 case DW_TAG_set_type:
3297 case DW_TAG_array_type:
3298 case DW_TAG_pointer_type:
3299 case DW_TAG_ptr_to_member_type:
3300 case DW_TAG_reference_type:
3301 case DW_TAG_string_type:
3304 case DW_TAG_base_type:
3305 case DW_TAG_subrange_type:
3306 case DW_TAG_typedef:
3307 /* Add a typedef symbol for the type definition, if it has a
3309 new_symbol (die, read_type_die (die, cu), cu);
3311 case DW_TAG_common_block:
3312 read_common_block (die, cu);
3314 case DW_TAG_common_inclusion:
3316 case DW_TAG_namespace:
3317 processing_has_namespace_info = 1;
3318 read_namespace (die, cu);
3321 read_module (die, cu);
3323 case DW_TAG_imported_declaration:
3324 case DW_TAG_imported_module:
3325 processing_has_namespace_info = 1;
3326 if (die->child != NULL && (die->tag == DW_TAG_imported_declaration
3327 || cu->language != language_fortran))
3328 complaint (&symfile_complaints, _("Tag '%s' has unexpected children"),
3329 dwarf_tag_name (die->tag));
3330 read_import_statement (die, cu);
3333 new_symbol (die, NULL, cu);
3338 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3339 If scope qualifiers are appropriate they will be added. The result
3340 will be allocated on the objfile_obstack, or NULL if the DIE does
3344 dwarf2_full_name (struct die_info *die, struct dwarf2_cu *cu)
3346 struct attribute *attr;
3347 char *prefix, *name;
3348 struct ui_file *buf = NULL;
3350 name = dwarf2_name (die, cu);
3354 /* These are the only languages we know how to qualify names in. */
3355 if (cu->language != language_cplus
3356 && cu->language != language_java)
3359 /* If no prefix is necessary for this type of DIE, return the
3360 unqualified name. The other three tags listed could be handled
3361 in pdi_needs_namespace, but that requires broader changes. */
3362 if (!pdi_needs_namespace (die->tag)
3363 && die->tag != DW_TAG_subprogram
3364 && die->tag != DW_TAG_variable
3365 && die->tag != DW_TAG_member)
3368 prefix = determine_prefix (die, cu);
3369 if (*prefix != '\0')
3370 name = typename_concat (&cu->objfile->objfile_obstack, prefix,
3376 /* Read the import statement specified by the given die and record it. */
3379 read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
3381 struct attribute *import_attr;
3382 struct die_info *imported_die;
3383 struct dwarf2_cu *imported_cu;
3384 const char *imported_name;
3385 const char *imported_name_prefix;
3386 const char *import_prefix;
3387 char *canonical_name;
3389 import_attr = dwarf2_attr (die, DW_AT_import, cu);
3390 if (import_attr == NULL)
3392 complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"),
3393 dwarf_tag_name (die->tag));
3398 imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu);
3399 imported_name = dwarf2_name (imported_die, imported_cu);
3400 if (imported_name == NULL)
3402 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3404 The import in the following code:
3418 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3419 <52> DW_AT_decl_file : 1
3420 <53> DW_AT_decl_line : 6
3421 <54> DW_AT_import : <0x75>
3422 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3424 <5b> DW_AT_decl_file : 1
3425 <5c> DW_AT_decl_line : 2
3426 <5d> DW_AT_type : <0x6e>
3428 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3429 <76> DW_AT_byte_size : 4
3430 <77> DW_AT_encoding : 5 (signed)
3432 imports the wrong die ( 0x75 instead of 0x58 ).
3433 This case will be ignored until the gcc bug is fixed. */
3437 /* FIXME: dwarf2_name (die); for the local name after import. */
3439 /* Figure out where the statement is being imported to. */
3440 import_prefix = determine_prefix (die, cu);
3442 /* Figure out what the scope of the imported die is and prepend it
3443 to the name of the imported die. */
3444 imported_name_prefix = determine_prefix (imported_die, imported_cu);
3446 if (strlen (imported_name_prefix) > 0)
3448 canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1);
3449 strcpy (canonical_name, imported_name_prefix);
3450 strcat (canonical_name, "::");
3451 strcat (canonical_name, imported_name);
3455 canonical_name = alloca (strlen (imported_name) + 1);
3456 strcpy (canonical_name, imported_name);
3459 using_directives = cp_add_using (import_prefix,canonical_name, using_directives);
3463 initialize_cu_func_list (struct dwarf2_cu *cu)
3465 cu->first_fn = cu->last_fn = cu->cached_fn = NULL;
3469 free_cu_line_header (void *arg)
3471 struct dwarf2_cu *cu = arg;
3473 free_line_header (cu->line_header);
3474 cu->line_header = NULL;
3478 read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
3480 struct objfile *objfile = cu->objfile;
3481 struct comp_unit_head *cu_header = &cu->header;
3482 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3483 CORE_ADDR lowpc = ((CORE_ADDR) -1);
3484 CORE_ADDR highpc = ((CORE_ADDR) 0);
3485 struct attribute *attr;
3487 char *comp_dir = NULL;
3488 struct die_info *child_die;
3489 bfd *abfd = objfile->obfd;
3490 struct line_header *line_header = 0;
3493 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3495 get_scope_pc_bounds (die, &lowpc, &highpc, cu);
3497 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3498 from finish_block. */
3499 if (lowpc == ((CORE_ADDR) -1))
3504 /* Find the filename. Do not use dwarf2_name here, since the filename
3505 is not a source language identifier. */
3506 attr = dwarf2_attr (die, DW_AT_name, cu);
3509 name = DW_STRING (attr);
3512 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3514 comp_dir = DW_STRING (attr);
3515 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3517 comp_dir = ldirname (name);
3518 if (comp_dir != NULL)
3519 make_cleanup (xfree, comp_dir);
3521 if (comp_dir != NULL)
3523 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3524 directory, get rid of it. */
3525 char *cp = strchr (comp_dir, ':');
3527 if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/')
3534 attr = dwarf2_attr (die, DW_AT_language, cu);
3537 set_cu_language (DW_UNSND (attr), cu);
3540 attr = dwarf2_attr (die, DW_AT_producer, cu);
3542 cu->producer = DW_STRING (attr);
3544 /* We assume that we're processing GCC output. */
3545 processing_gcc_compilation = 2;
3547 processing_has_namespace_info = 0;
3549 start_symtab (name, comp_dir, lowpc);
3550 record_debugformat ("DWARF 2");
3551 record_producer (cu->producer);
3553 initialize_cu_func_list (cu);
3555 /* Decode line number information if present. We do this before
3556 processing child DIEs, so that the line header table is available
3557 for DW_AT_decl_file. */
3558 attr = dwarf2_attr (die, DW_AT_stmt_list, cu);
3561 unsigned int line_offset = DW_UNSND (attr);
3562 line_header = dwarf_decode_line_header (line_offset, abfd, cu);
3565 cu->line_header = line_header;
3566 make_cleanup (free_cu_line_header, cu);
3567 dwarf_decode_lines (line_header, comp_dir, abfd, cu, NULL);
3571 /* Process all dies in compilation unit. */
3572 if (die->child != NULL)
3574 child_die = die->child;
3575 while (child_die && child_die->tag)
3577 process_die (child_die, cu);
3578 child_die = sibling_die (child_die);
3582 /* Decode macro information, if present. Dwarf 2 macro information
3583 refers to information in the line number info statement program
3584 header, so we can only read it if we've read the header
3586 attr = dwarf2_attr (die, DW_AT_macro_info, cu);
3587 if (attr && line_header)
3589 unsigned int macro_offset = DW_UNSND (attr);
3590 dwarf_decode_macros (line_header, macro_offset,
3591 comp_dir, abfd, cu);
3593 do_cleanups (back_to);
3596 /* For TUs we want to skip the first top level sibling if it's not the
3597 actual type being defined by this TU. In this case the first top
3598 level sibling is there to provide context only. */
3601 read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu)
3603 struct objfile *objfile = cu->objfile;
3604 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
3606 struct attribute *attr;
3608 char *comp_dir = NULL;
3609 struct die_info *child_die;
3610 bfd *abfd = objfile->obfd;
3611 struct line_header *line_header = 0;
3613 /* start_symtab needs a low pc, but we don't really have one.
3614 Do what read_file_scope would do in the absence of such info. */
3615 lowpc = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3617 /* Find the filename. Do not use dwarf2_name here, since the filename
3618 is not a source language identifier. */
3619 attr = dwarf2_attr (die, DW_AT_name, cu);
3621 name = DW_STRING (attr);
3623 attr = dwarf2_attr (die, DW_AT_comp_dir, cu);
3625 comp_dir = DW_STRING (attr);
3626 else if (name != NULL && IS_ABSOLUTE_PATH (name))
3628 comp_dir = ldirname (name);
3629 if (comp_dir != NULL)
3630 make_cleanup (xfree, comp_dir);
3636 attr = dwarf2_attr (die, DW_AT_language, cu);
3638 set_cu_language (DW_UNSND (attr), cu);
3640 /* This isn't technically needed today. It is done for symmetry
3641 with read_file_scope. */
3642 attr = dwarf2_attr (die, DW_AT_producer, cu);
3644 cu->producer = DW_STRING (attr);
3646 /* We assume that we're processing GCC output. */
3647 processing_gcc_compilation = 2;
3649 processing_has_namespace_info = 0;
3651 start_symtab (name, comp_dir, lowpc);
3652 record_debugformat ("DWARF 2");
3653 record_producer (cu->producer);
3655 /* Process the dies in the type unit. */
3656 if (die->child == NULL)
3658 dump_die_for_error (die);
3659 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3660 bfd_get_filename (abfd));
3663 child_die = die->child;
3665 while (child_die && child_die->tag)
3667 process_die (child_die, cu);
3669 child_die = sibling_die (child_die);
3672 do_cleanups (back_to);
3676 add_to_cu_func_list (const char *name, CORE_ADDR lowpc, CORE_ADDR highpc,
3677 struct dwarf2_cu *cu)
3679 struct function_range *thisfn;
3681 thisfn = (struct function_range *)
3682 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct function_range));
3683 thisfn->name = name;
3684 thisfn->lowpc = lowpc;
3685 thisfn->highpc = highpc;
3686 thisfn->seen_line = 0;
3687 thisfn->next = NULL;
3689 if (cu->last_fn == NULL)
3690 cu->first_fn = thisfn;
3692 cu->last_fn->next = thisfn;
3694 cu->last_fn = thisfn;
3697 /* qsort helper for inherit_abstract_dies. */
3700 unsigned_int_compar (const void *ap, const void *bp)
3702 unsigned int a = *(unsigned int *) ap;
3703 unsigned int b = *(unsigned int *) bp;
3705 return (a > b) - (b > a);
3708 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3709 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3710 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3713 inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu)
3715 struct die_info *child_die;
3716 unsigned die_children_count;
3717 /* CU offsets which were referenced by children of the current DIE. */
3719 unsigned *offsets_end, *offsetp;
3720 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3721 struct die_info *origin_die;
3722 /* Iterator of the ORIGIN_DIE children. */
3723 struct die_info *origin_child_die;
3724 struct cleanup *cleanups;
3725 struct attribute *attr;
3727 attr = dwarf2_attr (die, DW_AT_abstract_origin, cu);
3731 origin_die = follow_die_ref (die, attr, &cu);
3732 if (die->tag != origin_die->tag
3733 && !(die->tag == DW_TAG_inlined_subroutine
3734 && origin_die->tag == DW_TAG_subprogram))
3735 complaint (&symfile_complaints,
3736 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3737 die->offset, origin_die->offset);
3739 child_die = die->child;
3740 die_children_count = 0;
3741 while (child_die && child_die->tag)
3743 child_die = sibling_die (child_die);
3744 die_children_count++;
3746 offsets = xmalloc (sizeof (*offsets) * die_children_count);
3747 cleanups = make_cleanup (xfree, offsets);
3749 offsets_end = offsets;
3750 child_die = die->child;
3751 while (child_die && child_die->tag)
3753 /* For each CHILD_DIE, find the corresponding child of
3754 ORIGIN_DIE. If there is more than one layer of
3755 DW_AT_abstract_origin, follow them all; there shouldn't be,
3756 but GCC versions at least through 4.4 generate this (GCC PR
3758 struct die_info *child_origin_die = child_die;
3761 attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
3764 child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
3767 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3768 counterpart may exist. */
3769 if (child_origin_die != child_die)
3771 if (child_die->tag != child_origin_die->tag
3772 && !(child_die->tag == DW_TAG_inlined_subroutine
3773 && child_origin_die->tag == DW_TAG_subprogram))
3774 complaint (&symfile_complaints,
3775 _("Child DIE 0x%x and its abstract origin 0x%x have "
3776 "different tags"), child_die->offset,
3777 child_origin_die->offset);
3778 if (child_origin_die->parent != origin_die)
3779 complaint (&symfile_complaints,
3780 _("Child DIE 0x%x and its abstract origin 0x%x have "
3781 "different parents"), child_die->offset,
3782 child_origin_die->offset);
3784 *offsets_end++ = child_origin_die->offset;
3786 child_die = sibling_die (child_die);
3788 qsort (offsets, offsets_end - offsets, sizeof (*offsets),
3789 unsigned_int_compar);
3790 for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++)
3791 if (offsetp[-1] == *offsetp)
3792 complaint (&symfile_complaints, _("Multiple children of DIE 0x%x refer "
3793 "to DIE 0x%x as their abstract origin"),
3794 die->offset, *offsetp);
3797 origin_child_die = origin_die->child;
3798 while (origin_child_die && origin_child_die->tag)
3800 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3801 while (offsetp < offsets_end && *offsetp < origin_child_die->offset)
3803 if (offsetp >= offsets_end || *offsetp > origin_child_die->offset)
3805 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3806 process_die (origin_child_die, cu);
3808 origin_child_die = sibling_die (origin_child_die);
3811 do_cleanups (cleanups);
3815 read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
3817 struct objfile *objfile = cu->objfile;
3818 struct context_stack *new;
3821 struct die_info *child_die;
3822 struct attribute *attr, *call_line, *call_file;
3825 struct block *block;
3826 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
3830 /* If we do not have call site information, we can't show the
3831 caller of this inlined function. That's too confusing, so
3832 only use the scope for local variables. */
3833 call_line = dwarf2_attr (die, DW_AT_call_line, cu);
3834 call_file = dwarf2_attr (die, DW_AT_call_file, cu);
3835 if (call_line == NULL || call_file == NULL)
3837 read_lexical_block_scope (die, cu);
3842 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3844 name = dwarf2_linkage_name (die, cu);
3846 /* Ignore functions with missing or empty names and functions with
3847 missing or invalid low and high pc attributes. */
3848 if (name == NULL || !dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3854 /* Record the function range for dwarf_decode_lines. */
3855 add_to_cu_func_list (name, lowpc, highpc, cu);
3857 new = push_context (0, lowpc);
3858 new->name = new_symbol (die, read_type_die (die, cu), cu);
3860 /* If there is a location expression for DW_AT_frame_base, record
3862 attr = dwarf2_attr (die, DW_AT_frame_base, cu);
3864 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3865 expression is being recorded directly in the function's symbol
3866 and not in a separate frame-base object. I guess this hack is
3867 to avoid adding some sort of frame-base adjunct/annex to the
3868 function's symbol :-(. The problem with doing this is that it
3869 results in a function symbol with a location expression that
3870 has nothing to do with the location of the function, ouch! The
3871 relationship should be: a function's symbol has-a frame base; a
3872 frame-base has-a location expression. */
3873 dwarf2_symbol_mark_computed (attr, new->name, cu);
3875 cu->list_in_scope = &local_symbols;
3877 if (die->child != NULL)
3879 child_die = die->child;
3880 while (child_die && child_die->tag)
3882 process_die (child_die, cu);
3883 child_die = sibling_die (child_die);
3887 inherit_abstract_dies (die, cu);
3889 new = pop_context ();
3890 /* Make a block for the local symbols within. */
3891 block = finish_block (new->name, &local_symbols, new->old_blocks,
3892 lowpc, highpc, objfile);
3894 /* For C++, set the block's scope. */
3895 if (cu->language == language_cplus)
3896 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
3897 determine_prefix (die, cu),
3898 processing_has_namespace_info);
3900 /* If we have address ranges, record them. */
3901 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3903 /* In C++, we can have functions nested inside functions (e.g., when
3904 a function declares a class that has methods). This means that
3905 when we finish processing a function scope, we may need to go
3906 back to building a containing block's symbol lists. */
3907 local_symbols = new->locals;
3908 param_symbols = new->params;
3909 using_directives = new->using_directives;
3911 /* If we've finished processing a top-level function, subsequent
3912 symbols go in the file symbol list. */
3913 if (outermost_context_p ())
3914 cu->list_in_scope = &file_symbols;
3917 /* Process all the DIES contained within a lexical block scope. Start
3918 a new scope, process the dies, and then close the scope. */
3921 read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu)
3923 struct objfile *objfile = cu->objfile;
3924 struct context_stack *new;
3925 CORE_ADDR lowpc, highpc;
3926 struct die_info *child_die;
3929 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
3931 /* Ignore blocks with missing or invalid low and high pc attributes. */
3932 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3933 as multiple lexical blocks? Handling children in a sane way would
3934 be nasty. Might be easier to properly extend generic blocks to
3936 if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL))
3941 push_context (0, lowpc);
3942 if (die->child != NULL)
3944 child_die = die->child;
3945 while (child_die && child_die->tag)
3947 process_die (child_die, cu);
3948 child_die = sibling_die (child_die);
3951 new = pop_context ();
3953 if (local_symbols != NULL)
3956 = finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
3959 /* Note that recording ranges after traversing children, as we
3960 do here, means that recording a parent's ranges entails
3961 walking across all its children's ranges as they appear in
3962 the address map, which is quadratic behavior.
3964 It would be nicer to record the parent's ranges before
3965 traversing its children, simply overriding whatever you find
3966 there. But since we don't even decide whether to create a
3967 block until after we've traversed its children, that's hard
3969 dwarf2_record_block_ranges (die, block, baseaddr, cu);
3971 local_symbols = new->locals;
3972 using_directives = new->using_directives;
3975 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3976 Return 1 if the attributes are present and valid, otherwise, return 0.
3977 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3980 dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return,
3981 CORE_ADDR *high_return, struct dwarf2_cu *cu,
3982 struct partial_symtab *ranges_pst)
3984 struct objfile *objfile = cu->objfile;
3985 struct comp_unit_head *cu_header = &cu->header;
3986 bfd *obfd = objfile->obfd;
3987 unsigned int addr_size = cu_header->addr_size;
3988 CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
3989 /* Base address selection entry. */
4000 found_base = cu->base_known;
4001 base = cu->base_address;
4003 if (offset >= dwarf2_per_objfile->ranges.size)
4005 complaint (&symfile_complaints,
4006 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4010 buffer = dwarf2_per_objfile->ranges.buffer + offset;
4012 /* Read in the largest possible address. */
4013 marker = read_address (obfd, buffer, cu, &dummy);
4014 if ((marker & mask) == mask)
4016 /* If we found the largest possible address, then
4017 read the base address. */
4018 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4019 buffer += 2 * addr_size;
4020 offset += 2 * addr_size;
4026 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
4030 CORE_ADDR range_beginning, range_end;
4032 range_beginning = read_address (obfd, buffer, cu, &dummy);
4033 buffer += addr_size;
4034 range_end = read_address (obfd, buffer, cu, &dummy);
4035 buffer += addr_size;
4036 offset += 2 * addr_size;
4038 /* An end of list marker is a pair of zero addresses. */
4039 if (range_beginning == 0 && range_end == 0)
4040 /* Found the end of list entry. */
4043 /* Each base address selection entry is a pair of 2 values.
4044 The first is the largest possible address, the second is
4045 the base address. Check for a base address here. */
4046 if ((range_beginning & mask) == mask)
4048 /* If we found the largest possible address, then
4049 read the base address. */
4050 base = read_address (obfd, buffer + addr_size, cu, &dummy);
4057 /* We have no valid base address for the ranges
4059 complaint (&symfile_complaints,
4060 _("Invalid .debug_ranges data (no base address)"));
4064 range_beginning += base;
4067 if (ranges_pst != NULL && range_beginning < range_end)
4068 addrmap_set_empty (objfile->psymtabs_addrmap,
4069 range_beginning + baseaddr, range_end - 1 + baseaddr,
4072 /* FIXME: This is recording everything as a low-high
4073 segment of consecutive addresses. We should have a
4074 data structure for discontiguous block ranges
4078 low = range_beginning;
4084 if (range_beginning < low)
4085 low = range_beginning;
4086 if (range_end > high)
4092 /* If the first entry is an end-of-list marker, the range
4093 describes an empty scope, i.e. no instructions. */
4099 *high_return = high;
4103 /* Get low and high pc attributes from a die. Return 1 if the attributes
4104 are present and valid, otherwise, return 0. Return -1 if the range is
4105 discontinuous, i.e. derived from DW_AT_ranges information. */
4107 dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc,
4108 CORE_ADDR *highpc, struct dwarf2_cu *cu,
4109 struct partial_symtab *pst)
4111 struct attribute *attr;
4116 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4119 high = DW_ADDR (attr);
4120 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4122 low = DW_ADDR (attr);
4124 /* Found high w/o low attribute. */
4127 /* Found consecutive range of addresses. */
4132 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4135 /* Value of the DW_AT_ranges attribute is the offset in the
4136 .debug_ranges section. */
4137 if (!dwarf2_ranges_read (DW_UNSND (attr), &low, &high, cu, pst))
4139 /* Found discontinuous range of addresses. */
4147 /* When using the GNU linker, .gnu.linkonce. sections are used to
4148 eliminate duplicate copies of functions and vtables and such.
4149 The linker will arbitrarily choose one and discard the others.
4150 The AT_*_pc values for such functions refer to local labels in
4151 these sections. If the section from that file was discarded, the
4152 labels are not in the output, so the relocs get a value of 0.
4153 If this is a discarded function, mark the pc bounds as invalid,
4154 so that GDB will ignore it. */
4155 if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
4163 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4164 its low and high PC addresses. Do nothing if these addresses could not
4165 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4166 and HIGHPC to the high address if greater than HIGHPC. */
4169 dwarf2_get_subprogram_pc_bounds (struct die_info *die,
4170 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4171 struct dwarf2_cu *cu)
4173 CORE_ADDR low, high;
4174 struct die_info *child = die->child;
4176 if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL))
4178 *lowpc = min (*lowpc, low);
4179 *highpc = max (*highpc, high);
4182 /* If the language does not allow nested subprograms (either inside
4183 subprograms or lexical blocks), we're done. */
4184 if (cu->language != language_ada)
4187 /* Check all the children of the given DIE. If it contains nested
4188 subprograms, then check their pc bounds. Likewise, we need to
4189 check lexical blocks as well, as they may also contain subprogram
4191 while (child && child->tag)
4193 if (child->tag == DW_TAG_subprogram
4194 || child->tag == DW_TAG_lexical_block)
4195 dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu);
4196 child = sibling_die (child);
4200 /* Get the low and high pc's represented by the scope DIE, and store
4201 them in *LOWPC and *HIGHPC. If the correct values can't be
4202 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4205 get_scope_pc_bounds (struct die_info *die,
4206 CORE_ADDR *lowpc, CORE_ADDR *highpc,
4207 struct dwarf2_cu *cu)
4209 CORE_ADDR best_low = (CORE_ADDR) -1;
4210 CORE_ADDR best_high = (CORE_ADDR) 0;
4211 CORE_ADDR current_low, current_high;
4213 if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL))
4215 best_low = current_low;
4216 best_high = current_high;
4220 struct die_info *child = die->child;
4222 while (child && child->tag)
4224 switch (child->tag) {
4225 case DW_TAG_subprogram:
4226 dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu);
4228 case DW_TAG_namespace:
4229 /* FIXME: carlton/2004-01-16: Should we do this for
4230 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4231 that current GCC's always emit the DIEs corresponding
4232 to definitions of methods of classes as children of a
4233 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4234 the DIEs giving the declarations, which could be
4235 anywhere). But I don't see any reason why the
4236 standards says that they have to be there. */
4237 get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu);
4239 if (current_low != ((CORE_ADDR) -1))
4241 best_low = min (best_low, current_low);
4242 best_high = max (best_high, current_high);
4250 child = sibling_die (child);
4255 *highpc = best_high;
4258 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4261 dwarf2_record_block_ranges (struct die_info *die, struct block *block,
4262 CORE_ADDR baseaddr, struct dwarf2_cu *cu)
4264 struct attribute *attr;
4266 attr = dwarf2_attr (die, DW_AT_high_pc, cu);
4269 CORE_ADDR high = DW_ADDR (attr);
4270 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
4273 CORE_ADDR low = DW_ADDR (attr);
4274 record_block_range (block, baseaddr + low, baseaddr + high - 1);
4278 attr = dwarf2_attr (die, DW_AT_ranges, cu);
4281 bfd *obfd = cu->objfile->obfd;
4283 /* The value of the DW_AT_ranges attribute is the offset of the
4284 address range list in the .debug_ranges section. */
4285 unsigned long offset = DW_UNSND (attr);
4286 gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset;
4288 /* For some target architectures, but not others, the
4289 read_address function sign-extends the addresses it returns.
4290 To recognize base address selection entries, we need a
4292 unsigned int addr_size = cu->header.addr_size;
4293 CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
4295 /* The base address, to which the next pair is relative. Note
4296 that this 'base' is a DWARF concept: most entries in a range
4297 list are relative, to reduce the number of relocs against the
4298 debugging information. This is separate from this function's
4299 'baseaddr' argument, which GDB uses to relocate debugging
4300 information from a shared library based on the address at
4301 which the library was loaded. */
4302 CORE_ADDR base = cu->base_address;
4303 int base_known = cu->base_known;
4305 if (offset >= dwarf2_per_objfile->ranges.size)
4307 complaint (&symfile_complaints,
4308 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4315 unsigned int bytes_read;
4316 CORE_ADDR start, end;
4318 start = read_address (obfd, buffer, cu, &bytes_read);
4319 buffer += bytes_read;
4320 end = read_address (obfd, buffer, cu, &bytes_read);
4321 buffer += bytes_read;
4323 /* Did we find the end of the range list? */
4324 if (start == 0 && end == 0)
4327 /* Did we find a base address selection entry? */
4328 else if ((start & base_select_mask) == base_select_mask)
4334 /* We found an ordinary address range. */
4339 complaint (&symfile_complaints,
4340 _("Invalid .debug_ranges data (no base address)"));
4344 record_block_range (block,
4345 baseaddr + base + start,
4346 baseaddr + base + end - 1);
4352 /* Add an aggregate field to the field list. */
4355 dwarf2_add_field (struct field_info *fip, struct die_info *die,
4356 struct dwarf2_cu *cu)
4358 struct objfile *objfile = cu->objfile;
4359 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4360 struct nextfield *new_field;
4361 struct attribute *attr;
4363 char *fieldname = "";
4365 /* Allocate a new field list entry and link it in. */
4366 new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4367 make_cleanup (xfree, new_field);
4368 memset (new_field, 0, sizeof (struct nextfield));
4370 if (die->tag == DW_TAG_inheritance)
4372 new_field->next = fip->baseclasses;
4373 fip->baseclasses = new_field;
4377 new_field->next = fip->fields;
4378 fip->fields = new_field;
4382 /* Handle accessibility and virtuality of field.
4383 The default accessibility for members is public, the default
4384 accessibility for inheritance is private. */
4385 if (die->tag != DW_TAG_inheritance)
4386 new_field->accessibility = DW_ACCESS_public;
4388 new_field->accessibility = DW_ACCESS_private;
4389 new_field->virtuality = DW_VIRTUALITY_none;
4391 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4393 new_field->accessibility = DW_UNSND (attr);
4394 if (new_field->accessibility != DW_ACCESS_public)
4395 fip->non_public_fields = 1;
4396 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4398 new_field->virtuality = DW_UNSND (attr);
4400 fp = &new_field->field;
4402 if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu))
4404 /* Data member other than a C++ static data member. */
4406 /* Get type of field. */
4407 fp->type = die_type (die, cu);
4409 SET_FIELD_BITPOS (*fp, 0);
4411 /* Get bit size of field (zero if none). */
4412 attr = dwarf2_attr (die, DW_AT_bit_size, cu);
4415 FIELD_BITSIZE (*fp) = DW_UNSND (attr);
4419 FIELD_BITSIZE (*fp) = 0;
4422 /* Get bit offset of field. */
4423 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4426 int byte_offset = 0;
4428 if (attr_form_is_section_offset (attr))
4429 dwarf2_complex_location_expr_complaint ();
4430 else if (attr_form_is_constant (attr))
4431 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4432 else if (attr_form_is_block (attr))
4433 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4435 dwarf2_complex_location_expr_complaint ();
4437 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4439 attr = dwarf2_attr (die, DW_AT_bit_offset, cu);
4442 if (gdbarch_bits_big_endian (gdbarch))
4444 /* For big endian bits, the DW_AT_bit_offset gives the
4445 additional bit offset from the MSB of the containing
4446 anonymous object to the MSB of the field. We don't
4447 have to do anything special since we don't need to
4448 know the size of the anonymous object. */
4449 FIELD_BITPOS (*fp) += DW_UNSND (attr);
4453 /* For little endian bits, compute the bit offset to the
4454 MSB of the anonymous object, subtract off the number of
4455 bits from the MSB of the field to the MSB of the
4456 object, and then subtract off the number of bits of
4457 the field itself. The result is the bit offset of
4458 the LSB of the field. */
4460 int bit_offset = DW_UNSND (attr);
4462 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
4465 /* The size of the anonymous object containing
4466 the bit field is explicit, so use the
4467 indicated size (in bytes). */
4468 anonymous_size = DW_UNSND (attr);
4472 /* The size of the anonymous object containing
4473 the bit field must be inferred from the type
4474 attribute of the data member containing the
4476 anonymous_size = TYPE_LENGTH (fp->type);
4478 FIELD_BITPOS (*fp) += anonymous_size * bits_per_byte
4479 - bit_offset - FIELD_BITSIZE (*fp);
4483 /* Get name of field. */
4484 fieldname = dwarf2_name (die, cu);
4485 if (fieldname == NULL)
4488 /* The name is already allocated along with this objfile, so we don't
4489 need to duplicate it for the type. */
4490 fp->name = fieldname;
4492 /* Change accessibility for artificial fields (e.g. virtual table
4493 pointer or virtual base class pointer) to private. */
4494 if (dwarf2_attr (die, DW_AT_artificial, cu))
4496 FIELD_ARTIFICIAL (*fp) = 1;
4497 new_field->accessibility = DW_ACCESS_private;
4498 fip->non_public_fields = 1;
4501 else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable)
4503 /* C++ static member. */
4505 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4506 is a declaration, but all versions of G++ as of this writing
4507 (so through at least 3.2.1) incorrectly generate
4508 DW_TAG_variable tags. */
4512 /* Get name of field. */
4513 fieldname = dwarf2_name (die, cu);
4514 if (fieldname == NULL)
4517 /* Get physical name. */
4518 physname = dwarf2_linkage_name (die, cu);
4520 /* The name is already allocated along with this objfile, so we don't
4521 need to duplicate it for the type. */
4522 SET_FIELD_PHYSNAME (*fp, physname ? physname : "");
4523 FIELD_TYPE (*fp) = die_type (die, cu);
4524 FIELD_NAME (*fp) = fieldname;
4526 else if (die->tag == DW_TAG_inheritance)
4528 /* C++ base class field. */
4529 attr = dwarf2_attr (die, DW_AT_data_member_location, cu);
4532 int byte_offset = 0;
4534 if (attr_form_is_section_offset (attr))
4535 dwarf2_complex_location_expr_complaint ();
4536 else if (attr_form_is_constant (attr))
4537 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
4538 else if (attr_form_is_block (attr))
4539 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
4541 dwarf2_complex_location_expr_complaint ();
4543 SET_FIELD_BITPOS (*fp, byte_offset * bits_per_byte);
4545 FIELD_BITSIZE (*fp) = 0;
4546 FIELD_TYPE (*fp) = die_type (die, cu);
4547 FIELD_NAME (*fp) = type_name_no_tag (fp->type);
4548 fip->nbaseclasses++;
4552 /* Create the vector of fields, and attach it to the type. */
4555 dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type,
4556 struct dwarf2_cu *cu)
4558 int nfields = fip->nfields;
4560 /* Record the field count, allocate space for the array of fields,
4561 and create blank accessibility bitfields if necessary. */
4562 TYPE_NFIELDS (type) = nfields;
4563 TYPE_FIELDS (type) = (struct field *)
4564 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4565 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4567 if (fip->non_public_fields)
4569 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4571 TYPE_FIELD_PRIVATE_BITS (type) =
4572 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4573 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4575 TYPE_FIELD_PROTECTED_BITS (type) =
4576 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4577 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4579 TYPE_FIELD_IGNORE_BITS (type) =
4580 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4581 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4584 /* If the type has baseclasses, allocate and clear a bit vector for
4585 TYPE_FIELD_VIRTUAL_BITS. */
4586 if (fip->nbaseclasses)
4588 int num_bytes = B_BYTES (fip->nbaseclasses);
4589 unsigned char *pointer;
4591 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4592 pointer = TYPE_ALLOC (type, num_bytes);
4593 TYPE_FIELD_VIRTUAL_BITS (type) = pointer;
4594 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses);
4595 TYPE_N_BASECLASSES (type) = fip->nbaseclasses;
4598 /* Copy the saved-up fields into the field vector. Start from the head
4599 of the list, adding to the tail of the field array, so that they end
4600 up in the same order in the array in which they were added to the list. */
4601 while (nfields-- > 0)
4603 struct nextfield *fieldp;
4607 fieldp = fip->fields;
4608 fip->fields = fieldp->next;
4612 fieldp = fip->baseclasses;
4613 fip->baseclasses = fieldp->next;
4616 TYPE_FIELD (type, nfields) = fieldp->field;
4617 switch (fieldp->accessibility)
4619 case DW_ACCESS_private:
4620 SET_TYPE_FIELD_PRIVATE (type, nfields);
4623 case DW_ACCESS_protected:
4624 SET_TYPE_FIELD_PROTECTED (type, nfields);
4627 case DW_ACCESS_public:
4631 /* Unknown accessibility. Complain and treat it as public. */
4633 complaint (&symfile_complaints, _("unsupported accessibility %d"),
4634 fieldp->accessibility);
4638 if (nfields < fip->nbaseclasses)
4640 switch (fieldp->virtuality)
4642 case DW_VIRTUALITY_virtual:
4643 case DW_VIRTUALITY_pure_virtual:
4644 SET_TYPE_FIELD_VIRTUAL (type, nfields);
4651 /* Add a member function to the proper fieldlist. */
4654 dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
4655 struct type *type, struct dwarf2_cu *cu)
4657 struct objfile *objfile = cu->objfile;
4658 struct attribute *attr;
4659 struct fnfieldlist *flp;
4661 struct fn_field *fnp;
4664 struct nextfnfield *new_fnfield;
4665 struct type *this_type;
4667 /* Get name of member function. */
4668 fieldname = dwarf2_name (die, cu);
4669 if (fieldname == NULL)
4672 /* Get the mangled name. */
4673 physname = dwarf2_linkage_name (die, cu);
4675 /* Look up member function name in fieldlist. */
4676 for (i = 0; i < fip->nfnfields; i++)
4678 if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0)
4682 /* Create new list element if necessary. */
4683 if (i < fip->nfnfields)
4684 flp = &fip->fnfieldlists[i];
4687 if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0)
4689 fip->fnfieldlists = (struct fnfieldlist *)
4690 xrealloc (fip->fnfieldlists,
4691 (fip->nfnfields + DW_FIELD_ALLOC_CHUNK)
4692 * sizeof (struct fnfieldlist));
4693 if (fip->nfnfields == 0)
4694 make_cleanup (free_current_contents, &fip->fnfieldlists);
4696 flp = &fip->fnfieldlists[fip->nfnfields];
4697 flp->name = fieldname;
4703 /* Create a new member function field and chain it to the field list
4705 new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield));
4706 make_cleanup (xfree, new_fnfield);
4707 memset (new_fnfield, 0, sizeof (struct nextfnfield));
4708 new_fnfield->next = flp->head;
4709 flp->head = new_fnfield;
4712 /* Fill in the member function field info. */
4713 fnp = &new_fnfield->fnfield;
4714 /* The name is already allocated along with this objfile, so we don't
4715 need to duplicate it for the type. */
4716 fnp->physname = physname ? physname : "";
4717 fnp->type = alloc_type (objfile);
4718 this_type = read_type_die (die, cu);
4719 if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC)
4721 int nparams = TYPE_NFIELDS (this_type);
4723 /* TYPE is the domain of this method, and THIS_TYPE is the type
4724 of the method itself (TYPE_CODE_METHOD). */
4725 smash_to_method_type (fnp->type, type,
4726 TYPE_TARGET_TYPE (this_type),
4727 TYPE_FIELDS (this_type),
4728 TYPE_NFIELDS (this_type),
4729 TYPE_VARARGS (this_type));
4731 /* Handle static member functions.
4732 Dwarf2 has no clean way to discern C++ static and non-static
4733 member functions. G++ helps GDB by marking the first
4734 parameter for non-static member functions (which is the
4735 this pointer) as artificial. We obtain this information
4736 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4737 if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0)
4738 fnp->voffset = VOFFSET_STATIC;
4741 complaint (&symfile_complaints, _("member function type missing for '%s'"),
4744 /* Get fcontext from DW_AT_containing_type if present. */
4745 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
4746 fnp->fcontext = die_containing_type (die, cu);
4748 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4749 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4751 /* Get accessibility. */
4752 attr = dwarf2_attr (die, DW_AT_accessibility, cu);
4755 switch (DW_UNSND (attr))
4757 case DW_ACCESS_private:
4758 fnp->is_private = 1;
4760 case DW_ACCESS_protected:
4761 fnp->is_protected = 1;
4766 /* Check for artificial methods. */
4767 attr = dwarf2_attr (die, DW_AT_artificial, cu);
4768 if (attr && DW_UNSND (attr) != 0)
4769 fnp->is_artificial = 1;
4771 /* Get index in virtual function table if it is a virtual member
4772 function. For GCC, this is an offset in the appropriate
4773 virtual table, as specified by DW_AT_containing_type. For
4774 everyone else, it is an expression to be evaluated relative
4775 to the object address. */
4777 attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu);
4778 if (attr && fnp->fcontext)
4780 /* Support the .debug_loc offsets */
4781 if (attr_form_is_block (attr))
4783 fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2;
4785 else if (attr_form_is_section_offset (attr))
4787 dwarf2_complex_location_expr_complaint ();
4791 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4797 /* We only support trivial expressions here. This hack will work
4798 for v3 classes, which always start with the vtable pointer. */
4799 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0
4800 && DW_BLOCK (attr)->data[0] == DW_OP_deref)
4802 struct dwarf_block blk;
4803 blk.size = DW_BLOCK (attr)->size - 1;
4804 blk.data = DW_BLOCK (attr)->data + 1;
4805 fnp->voffset = decode_locdesc (&blk, cu);
4806 if ((fnp->voffset % cu->header.addr_size) != 0)
4807 dwarf2_complex_location_expr_complaint ();
4809 fnp->voffset /= cu->header.addr_size;
4811 fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0));
4814 dwarf2_complex_location_expr_complaint ();
4818 attr = dwarf2_attr (die, DW_AT_virtuality, cu);
4819 if (attr && DW_UNSND (attr))
4821 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4822 complaint (&symfile_complaints,
4823 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4824 fieldname, die->offset);
4825 TYPE_CPLUS_DYNAMIC (type) = 1;
4830 /* Create the vector of member function fields, and attach it to the type. */
4833 dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type,
4834 struct dwarf2_cu *cu)
4836 struct fnfieldlist *flp;
4837 int total_length = 0;
4840 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4841 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
4842 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields);
4844 for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++)
4846 struct nextfnfield *nfp = flp->head;
4847 struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i);
4850 TYPE_FN_FIELDLIST_NAME (type, i) = flp->name;
4851 TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length;
4852 fn_flp->fn_fields = (struct fn_field *)
4853 TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length);
4854 for (k = flp->length; (k--, nfp); nfp = nfp->next)
4855 fn_flp->fn_fields[k] = nfp->fnfield;
4857 total_length += flp->length;
4860 TYPE_NFN_FIELDS (type) = fip->nfnfields;
4861 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
4864 /* Returns non-zero if NAME is the name of a vtable member in CU's
4865 language, zero otherwise. */
4867 is_vtable_name (const char *name, struct dwarf2_cu *cu)
4869 static const char vptr[] = "_vptr";
4870 static const char vtable[] = "vtable";
4872 /* Look for the C++ and Java forms of the vtable. */
4873 if ((cu->language == language_java
4874 && strncmp (name, vtable, sizeof (vtable) - 1) == 0)
4875 || (strncmp (name, vptr, sizeof (vptr) - 1) == 0
4876 && is_cplus_marker (name[sizeof (vptr) - 1])))
4882 /* GCC outputs unnamed structures that are really pointers to member
4883 functions, with the ABI-specified layout. If DIE (from CU) describes
4884 such a structure, set its type, and return nonzero. Otherwise return
4887 GCC shouldn't do this; it should just output pointer to member DIEs.
4888 This is GCC PR debug/28767. */
4890 static struct type *
4891 quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
4893 struct objfile *objfile = cu->objfile;
4895 struct die_info *pfn_die, *delta_die;
4896 struct attribute *pfn_name, *delta_name;
4897 struct type *pfn_type, *domain_type;
4899 /* Check for a structure with no name and two children. */
4900 if (die->tag != DW_TAG_structure_type
4901 || dwarf2_attr (die, DW_AT_name, cu) != NULL
4902 || die->child == NULL
4903 || die->child->sibling == NULL
4904 || (die->child->sibling->sibling != NULL
4905 && die->child->sibling->sibling->tag != DW_TAG_padding))
4908 /* Check for __pfn and __delta members. */
4909 pfn_die = die->child;
4910 pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
4911 if (pfn_die->tag != DW_TAG_member
4913 || DW_STRING (pfn_name) == NULL
4914 || strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
4917 delta_die = pfn_die->sibling;
4918 delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
4919 if (delta_die->tag != DW_TAG_member
4920 || delta_name == NULL
4921 || DW_STRING (delta_name) == NULL
4922 || strcmp ("__delta", DW_STRING (delta_name)) != 0)
4925 /* Find the type of the method. */
4926 pfn_type = die_type (pfn_die, cu);
4927 if (pfn_type == NULL
4928 || TYPE_CODE (pfn_type) != TYPE_CODE_PTR
4929 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
4932 /* Look for the "this" argument. */
4933 pfn_type = TYPE_TARGET_TYPE (pfn_type);
4934 if (TYPE_NFIELDS (pfn_type) == 0
4935 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
4938 domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
4939 type = alloc_type (objfile);
4940 smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
4941 TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
4942 TYPE_VARARGS (pfn_type));
4943 type = lookup_methodptr_type (type);
4944 return set_die_type (die, type, cu);
4947 /* Called when we find the DIE that starts a structure or union scope
4948 (definition) to process all dies that define the members of the
4951 NOTE: we need to call struct_type regardless of whether or not the
4952 DIE has an at_name attribute, since it might be an anonymous
4953 structure or union. This gets the type entered into our set of
4956 However, if the structure is incomplete (an opaque struct/union)
4957 then suppress creating a symbol table entry for it since gdb only
4958 wants to find the one with the complete definition. Note that if
4959 it is complete, we just call new_symbol, which does it's own
4960 checking about whether the struct/union is anonymous or not (and
4961 suppresses creating a symbol table entry itself). */
4963 static struct type *
4964 read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
4966 struct objfile *objfile = cu->objfile;
4968 struct attribute *attr;
4970 struct cleanup *back_to = make_cleanup (null_cleanup, 0);
4972 type = quirk_gcc_member_function_pointer (die, cu);
4976 /* If the definition of this type lives in .debug_types, read that type.
4977 Don't follow DW_AT_specification though, that will take us back up
4978 the chain and we want to go down. */
4979 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
4982 struct dwarf2_cu *type_cu = cu;
4983 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
4984 /* We could just recurse on read_structure_type, but we need to call
4985 get_die_type to ensure only one type for this DIE is created.
4986 This is important, for example, because for c++ classes we need
4987 TYPE_NAME set which is only done by new_symbol. Blech. */
4988 type = read_type_die (type_die, type_cu);
4989 return set_die_type (die, type, cu);
4992 type = alloc_type (objfile);
4993 INIT_CPLUS_SPECIFIC (type);
4995 name = dwarf2_name (die, cu);
4998 if (cu->language == language_cplus
4999 || cu->language == language_java)
5001 const char *new_prefix = determine_class_name (die, cu);
5002 TYPE_TAG_NAME (type) = (char *) new_prefix;
5006 /* The name is already allocated along with this objfile, so
5007 we don't need to duplicate it for the type. */
5008 TYPE_TAG_NAME (type) = name;
5012 if (die->tag == DW_TAG_structure_type)
5014 TYPE_CODE (type) = TYPE_CODE_STRUCT;
5016 else if (die->tag == DW_TAG_union_type)
5018 TYPE_CODE (type) = TYPE_CODE_UNION;
5022 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5024 TYPE_CODE (type) = TYPE_CODE_CLASS;
5027 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5030 TYPE_LENGTH (type) = DW_UNSND (attr);
5034 TYPE_LENGTH (type) = 0;
5037 TYPE_STUB_SUPPORTED (type) = 1;
5038 if (die_is_declaration (die, cu))
5039 TYPE_STUB (type) = 1;
5041 /* We need to add the type field to the die immediately so we don't
5042 infinitely recurse when dealing with pointers to the structure
5043 type within the structure itself. */
5044 set_die_type (die, type, cu);
5046 if (die->child != NULL && ! die_is_declaration (die, cu))
5048 struct field_info fi;
5049 struct die_info *child_die;
5051 memset (&fi, 0, sizeof (struct field_info));
5053 child_die = die->child;
5055 while (child_die && child_die->tag)
5057 if (child_die->tag == DW_TAG_member
5058 || child_die->tag == DW_TAG_variable)
5060 /* NOTE: carlton/2002-11-05: A C++ static data member
5061 should be a DW_TAG_member that is a declaration, but
5062 all versions of G++ as of this writing (so through at
5063 least 3.2.1) incorrectly generate DW_TAG_variable
5064 tags for them instead. */
5065 dwarf2_add_field (&fi, child_die, cu);
5067 else if (child_die->tag == DW_TAG_subprogram)
5069 /* C++ member function. */
5070 dwarf2_add_member_fn (&fi, child_die, type, cu);
5072 else if (child_die->tag == DW_TAG_inheritance)
5074 /* C++ base class field. */
5075 dwarf2_add_field (&fi, child_die, cu);
5077 child_die = sibling_die (child_die);
5080 /* Attach fields and member functions to the type. */
5082 dwarf2_attach_fields_to_type (&fi, type, cu);
5085 dwarf2_attach_fn_fields_to_type (&fi, type, cu);
5087 /* Get the type which refers to the base class (possibly this
5088 class itself) which contains the vtable pointer for the current
5089 class from the DW_AT_containing_type attribute. This use of
5090 DW_AT_containing_type is a GNU extension. */
5092 if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL)
5094 struct type *t = die_containing_type (die, cu);
5096 TYPE_VPTR_BASETYPE (type) = t;
5101 /* Our own class provides vtbl ptr. */
5102 for (i = TYPE_NFIELDS (t) - 1;
5103 i >= TYPE_N_BASECLASSES (t);
5106 char *fieldname = TYPE_FIELD_NAME (t, i);
5108 if (is_vtable_name (fieldname, cu))
5110 TYPE_VPTR_FIELDNO (type) = i;
5115 /* Complain if virtual function table field not found. */
5116 if (i < TYPE_N_BASECLASSES (t))
5117 complaint (&symfile_complaints,
5118 _("virtual function table pointer not found when defining class '%s'"),
5119 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) :
5124 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
5127 else if (cu->producer
5128 && strncmp (cu->producer,
5129 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5131 /* The IBM XLC compiler does not provide direct indication
5132 of the containing type, but the vtable pointer is
5133 always named __vfp. */
5137 for (i = TYPE_NFIELDS (type) - 1;
5138 i >= TYPE_N_BASECLASSES (type);
5141 if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0)
5143 TYPE_VPTR_FIELDNO (type) = i;
5144 TYPE_VPTR_BASETYPE (type) = type;
5152 do_cleanups (back_to);
5157 process_structure_scope (struct die_info *die, struct dwarf2_cu *cu)
5159 struct objfile *objfile = cu->objfile;
5160 struct die_info *child_die = die->child;
5161 struct type *this_type;
5163 this_type = get_die_type (die, cu);
5164 if (this_type == NULL)
5165 this_type = read_structure_type (die, cu);
5167 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5168 snapshots) has been known to create a die giving a declaration
5169 for a class that has, as a child, a die giving a definition for a
5170 nested class. So we have to process our children even if the
5171 current die is a declaration. Normally, of course, a declaration
5172 won't have any children at all. */
5174 while (child_die != NULL && child_die->tag)
5176 if (child_die->tag == DW_TAG_member
5177 || child_die->tag == DW_TAG_variable
5178 || child_die->tag == DW_TAG_inheritance)
5183 process_die (child_die, cu);
5185 child_die = sibling_die (child_die);
5188 /* Do not consider external references. According to the DWARF standard,
5189 these DIEs are identified by the fact that they have no byte_size
5190 attribute, and a declaration attribute. */
5191 if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL
5192 || !die_is_declaration (die, cu))
5193 new_symbol (die, this_type, cu);
5196 /* Given a DW_AT_enumeration_type die, set its type. We do not
5197 complete the type's fields yet, or create any symbols. */
5199 static struct type *
5200 read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu)
5202 struct objfile *objfile = cu->objfile;
5204 struct attribute *attr;
5207 /* If the definition of this type lives in .debug_types, read that type.
5208 Don't follow DW_AT_specification though, that will take us back up
5209 the chain and we want to go down. */
5210 attr = dwarf2_attr_no_follow (die, DW_AT_signature, cu);
5213 struct dwarf2_cu *type_cu = cu;
5214 struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu);
5215 type = read_type_die (type_die, type_cu);
5216 return set_die_type (die, type, cu);
5219 type = alloc_type (objfile);
5221 TYPE_CODE (type) = TYPE_CODE_ENUM;
5222 name = dwarf2_full_name (die, cu);
5224 TYPE_TAG_NAME (type) = (char *) name;
5226 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5229 TYPE_LENGTH (type) = DW_UNSND (attr);
5233 TYPE_LENGTH (type) = 0;
5236 /* The enumeration DIE can be incomplete. In Ada, any type can be
5237 declared as private in the package spec, and then defined only
5238 inside the package body. Such types are known as Taft Amendment
5239 Types. When another package uses such a type, an incomplete DIE
5240 may be generated by the compiler. */
5241 if (die_is_declaration (die, cu))
5242 TYPE_STUB (type) = 1;
5244 return set_die_type (die, type, cu);
5247 /* Determine the name of the type represented by DIE, which should be
5248 a named C++ or Java compound type. Return the name in question,
5249 allocated on the objfile obstack. */
5252 determine_class_name (struct die_info *die, struct dwarf2_cu *cu)
5254 const char *new_prefix = NULL;
5256 /* If we don't have namespace debug info, guess the name by trying
5257 to demangle the names of members, just like we did in
5258 guess_structure_name. */
5259 if (!processing_has_namespace_info)
5261 struct die_info *child;
5263 for (child = die->child;
5264 child != NULL && child->tag != 0;
5265 child = sibling_die (child))
5267 if (child->tag == DW_TAG_subprogram)
5270 = language_class_name_from_physname (cu->language_defn,
5274 if (phys_prefix != NULL)
5277 = obsavestring (phys_prefix, strlen (phys_prefix),
5278 &cu->objfile->objfile_obstack);
5279 xfree (phys_prefix);
5286 if (new_prefix == NULL)
5287 new_prefix = dwarf2_full_name (die, cu);
5292 /* Given a pointer to a die which begins an enumeration, process all
5293 the dies that define the members of the enumeration, and create the
5294 symbol for the enumeration type.
5296 NOTE: We reverse the order of the element list. */
5299 process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu)
5301 struct objfile *objfile = cu->objfile;
5302 struct die_info *child_die;
5303 struct field *fields;
5306 int unsigned_enum = 1;
5308 struct type *this_type;
5312 this_type = get_die_type (die, cu);
5313 if (this_type == NULL)
5314 this_type = read_enumeration_type (die, cu);
5315 if (die->child != NULL)
5317 child_die = die->child;
5318 while (child_die && child_die->tag)
5320 if (child_die->tag != DW_TAG_enumerator)
5322 process_die (child_die, cu);
5326 name = dwarf2_name (child_die, cu);
5329 sym = new_symbol (child_die, this_type, cu);
5330 if (SYMBOL_VALUE (sym) < 0)
5333 if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0)
5335 fields = (struct field *)
5337 (num_fields + DW_FIELD_ALLOC_CHUNK)
5338 * sizeof (struct field));
5341 FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym);
5342 FIELD_TYPE (fields[num_fields]) = NULL;
5343 SET_FIELD_BITPOS (fields[num_fields], SYMBOL_VALUE (sym));
5344 FIELD_BITSIZE (fields[num_fields]) = 0;
5350 child_die = sibling_die (child_die);
5355 TYPE_NFIELDS (this_type) = num_fields;
5356 TYPE_FIELDS (this_type) = (struct field *)
5357 TYPE_ALLOC (this_type, sizeof (struct field) * num_fields);
5358 memcpy (TYPE_FIELDS (this_type), fields,
5359 sizeof (struct field) * num_fields);
5363 TYPE_UNSIGNED (this_type) = 1;
5366 new_symbol (die, this_type, cu);
5369 /* Extract all information from a DW_TAG_array_type DIE and put it in
5370 the DIE's type field. For now, this only handles one dimensional
5373 static struct type *
5374 read_array_type (struct die_info *die, struct dwarf2_cu *cu)
5376 struct objfile *objfile = cu->objfile;
5377 struct die_info *child_die;
5378 struct type *type = NULL;
5379 struct type *element_type, *range_type, *index_type;
5380 struct type **range_types = NULL;
5381 struct attribute *attr;
5383 struct cleanup *back_to;
5386 element_type = die_type (die, cu);
5388 /* Irix 6.2 native cc creates array types without children for
5389 arrays with unspecified length. */
5390 if (die->child == NULL)
5392 index_type = objfile_type (objfile)->builtin_int;
5393 range_type = create_range_type (NULL, index_type, 0, -1);
5394 type = create_array_type (NULL, element_type, range_type);
5395 return set_die_type (die, type, cu);
5398 back_to = make_cleanup (null_cleanup, NULL);
5399 child_die = die->child;
5400 while (child_die && child_die->tag)
5402 if (child_die->tag == DW_TAG_subrange_type)
5404 struct type *child_type = read_type_die (child_die, cu);
5405 if (child_type != NULL)
5407 /* The range type was succesfully read. Save it for
5408 the array type creation. */
5409 if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0)
5411 range_types = (struct type **)
5412 xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK)
5413 * sizeof (struct type *));
5415 make_cleanup (free_current_contents, &range_types);
5417 range_types[ndim++] = child_type;
5420 child_die = sibling_die (child_die);
5423 /* Dwarf2 dimensions are output from left to right, create the
5424 necessary array types in backwards order. */
5426 type = element_type;
5428 if (read_array_order (die, cu) == DW_ORD_col_major)
5432 type = create_array_type (NULL, type, range_types[i++]);
5437 type = create_array_type (NULL, type, range_types[ndim]);
5440 /* Understand Dwarf2 support for vector types (like they occur on
5441 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5442 array type. This is not part of the Dwarf2/3 standard yet, but a
5443 custom vendor extension. The main difference between a regular
5444 array and the vector variant is that vectors are passed by value
5446 attr = dwarf2_attr (die, DW_AT_GNU_vector, cu);
5448 make_vector_type (type);
5450 name = dwarf2_name (die, cu);
5452 TYPE_NAME (type) = name;
5454 do_cleanups (back_to);
5456 /* Install the type in the die. */
5457 return set_die_type (die, type, cu);
5460 static enum dwarf_array_dim_ordering
5461 read_array_order (struct die_info *die, struct dwarf2_cu *cu)
5463 struct attribute *attr;
5465 attr = dwarf2_attr (die, DW_AT_ordering, cu);
5467 if (attr) return DW_SND (attr);
5470 GNU F77 is a special case, as at 08/2004 array type info is the
5471 opposite order to the dwarf2 specification, but data is still
5472 laid out as per normal fortran.
5474 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5478 if (cu->language == language_fortran
5479 && cu->producer && strstr (cu->producer, "GNU F77"))
5481 return DW_ORD_row_major;
5484 switch (cu->language_defn->la_array_ordering)
5486 case array_column_major:
5487 return DW_ORD_col_major;
5488 case array_row_major:
5490 return DW_ORD_row_major;
5494 /* Extract all information from a DW_TAG_set_type DIE and put it in
5495 the DIE's type field. */
5497 static struct type *
5498 read_set_type (struct die_info *die, struct dwarf2_cu *cu)
5500 struct type *set_type = create_set_type (NULL, die_type (die, cu));
5502 return set_die_type (die, set_type, cu);
5505 /* First cut: install each common block member as a global variable. */
5508 read_common_block (struct die_info *die, struct dwarf2_cu *cu)
5510 struct die_info *child_die;
5511 struct attribute *attr;
5513 CORE_ADDR base = (CORE_ADDR) 0;
5515 attr = dwarf2_attr (die, DW_AT_location, cu);
5518 /* Support the .debug_loc offsets */
5519 if (attr_form_is_block (attr))
5521 base = decode_locdesc (DW_BLOCK (attr), cu);
5523 else if (attr_form_is_section_offset (attr))
5525 dwarf2_complex_location_expr_complaint ();
5529 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5530 "common block member");
5533 if (die->child != NULL)
5535 child_die = die->child;
5536 while (child_die && child_die->tag)
5538 sym = new_symbol (child_die, NULL, cu);
5539 attr = dwarf2_attr (child_die, DW_AT_data_member_location, cu);
5542 CORE_ADDR byte_offset = 0;
5544 if (attr_form_is_section_offset (attr))
5545 dwarf2_complex_location_expr_complaint ();
5546 else if (attr_form_is_constant (attr))
5547 byte_offset = dwarf2_get_attr_constant_value (attr, 0);
5548 else if (attr_form_is_block (attr))
5549 byte_offset = decode_locdesc (DW_BLOCK (attr), cu);
5551 dwarf2_complex_location_expr_complaint ();
5553 SYMBOL_VALUE_ADDRESS (sym) = base + byte_offset;
5554 add_symbol_to_list (sym, &global_symbols);
5556 child_die = sibling_die (child_die);
5561 /* Create a type for a C++ namespace. */
5563 static struct type *
5564 read_namespace_type (struct die_info *die, struct dwarf2_cu *cu)
5566 struct objfile *objfile = cu->objfile;
5567 const char *previous_prefix, *name;
5571 /* For extensions, reuse the type of the original namespace. */
5572 if (dwarf2_attr (die, DW_AT_extension, cu) != NULL)
5574 struct die_info *ext_die;
5575 struct dwarf2_cu *ext_cu = cu;
5576 ext_die = dwarf2_extension (die, &ext_cu);
5577 type = read_type_die (ext_die, ext_cu);
5578 return set_die_type (die, type, cu);
5581 name = namespace_name (die, &is_anonymous, cu);
5583 /* Now build the name of the current namespace. */
5585 previous_prefix = determine_prefix (die, cu);
5586 if (previous_prefix[0] != '\0')
5587 name = typename_concat (&objfile->objfile_obstack,
5588 previous_prefix, name, cu);
5590 /* Create the type. */
5591 type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL,
5593 TYPE_NAME (type) = (char *) name;
5594 TYPE_TAG_NAME (type) = TYPE_NAME (type);
5596 set_die_type (die, type, cu);
5601 /* Read a C++ namespace. */
5604 read_namespace (struct die_info *die, struct dwarf2_cu *cu)
5606 struct objfile *objfile = cu->objfile;
5610 /* Add a symbol associated to this if we haven't seen the namespace
5611 before. Also, add a using directive if it's an anonymous
5614 if (dwarf2_attr (die, DW_AT_extension, cu) == NULL)
5618 type = read_type_die (die, cu);
5619 new_symbol (die, type, cu);
5621 name = namespace_name (die, &is_anonymous, cu);
5624 const char *previous_prefix = determine_prefix (die, cu);
5625 cp_add_using_directive (previous_prefix, TYPE_NAME (type));
5629 if (die->child != NULL)
5631 struct die_info *child_die = die->child;
5633 while (child_die && child_die->tag)
5635 process_die (child_die, cu);
5636 child_die = sibling_die (child_die);
5641 /* Read a Fortran module. */
5644 read_module (struct die_info *die, struct dwarf2_cu *cu)
5646 struct die_info *child_die = die->child;
5648 /* FIXME: Support the separate Fortran module namespaces. */
5650 while (child_die && child_die->tag)
5652 process_die (child_die, cu);
5653 child_die = sibling_die (child_die);
5657 /* Return the name of the namespace represented by DIE. Set
5658 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5662 namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu)
5664 struct die_info *current_die;
5665 const char *name = NULL;
5667 /* Loop through the extensions until we find a name. */
5669 for (current_die = die;
5670 current_die != NULL;
5671 current_die = dwarf2_extension (die, &cu))
5673 name = dwarf2_name (current_die, cu);
5678 /* Is it an anonymous namespace? */
5680 *is_anonymous = (name == NULL);
5682 name = "(anonymous namespace)";
5687 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5688 the user defined type vector. */
5690 static struct type *
5691 read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
5693 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
5694 struct comp_unit_head *cu_header = &cu->header;
5696 struct attribute *attr_byte_size;
5697 struct attribute *attr_address_class;
5698 int byte_size, addr_class;
5700 type = lookup_pointer_type (die_type (die, cu));
5702 attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu);
5704 byte_size = DW_UNSND (attr_byte_size);
5706 byte_size = cu_header->addr_size;
5708 attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu);
5709 if (attr_address_class)
5710 addr_class = DW_UNSND (attr_address_class);
5712 addr_class = DW_ADDR_none;
5714 /* If the pointer size or address class is different than the
5715 default, create a type variant marked as such and set the
5716 length accordingly. */
5717 if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none)
5719 if (gdbarch_address_class_type_flags_p (gdbarch))
5723 type_flags = gdbarch_address_class_type_flags
5724 (gdbarch, byte_size, addr_class);
5725 gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
5727 type = make_type_with_address_space (type, type_flags);
5729 else if (TYPE_LENGTH (type) != byte_size)
5731 complaint (&symfile_complaints, _("invalid pointer size %d"), byte_size);
5734 /* Should we also complain about unhandled address classes? */
5738 TYPE_LENGTH (type) = byte_size;
5739 return set_die_type (die, type, cu);
5742 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5743 the user defined type vector. */
5745 static struct type *
5746 read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu)
5748 struct objfile *objfile = cu->objfile;
5750 struct type *to_type;
5751 struct type *domain;
5753 to_type = die_type (die, cu);
5754 domain = die_containing_type (die, cu);
5756 if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD)
5757 type = lookup_methodptr_type (to_type);
5759 type = lookup_memberptr_type (to_type, domain);
5761 return set_die_type (die, type, cu);
5764 /* Extract all information from a DW_TAG_reference_type DIE and add to
5765 the user defined type vector. */
5767 static struct type *
5768 read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
5770 struct comp_unit_head *cu_header = &cu->header;
5772 struct attribute *attr;
5774 type = lookup_reference_type (die_type (die, cu));
5775 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5778 TYPE_LENGTH (type) = DW_UNSND (attr);
5782 TYPE_LENGTH (type) = cu_header->addr_size;
5784 return set_die_type (die, type, cu);
5787 static struct type *
5788 read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu)
5790 struct type *base_type, *cv_type;
5792 base_type = die_type (die, cu);
5793 cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
5794 return set_die_type (die, cv_type, cu);
5797 static struct type *
5798 read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu)
5800 struct type *base_type, *cv_type;
5802 base_type = die_type (die, cu);
5803 cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
5804 return set_die_type (die, cv_type, cu);
5807 /* Extract all information from a DW_TAG_string_type DIE and add to
5808 the user defined type vector. It isn't really a user defined type,
5809 but it behaves like one, with other DIE's using an AT_user_def_type
5810 attribute to reference it. */
5812 static struct type *
5813 read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu)
5815 struct objfile *objfile = cu->objfile;
5816 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5817 struct type *type, *range_type, *index_type, *char_type;
5818 struct attribute *attr;
5819 unsigned int length;
5821 attr = dwarf2_attr (die, DW_AT_string_length, cu);
5824 length = DW_UNSND (attr);
5828 /* check for the DW_AT_byte_size attribute */
5829 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5832 length = DW_UNSND (attr);
5840 index_type = objfile_type (objfile)->builtin_int;
5841 range_type = create_range_type (NULL, index_type, 1, length);
5842 char_type = language_string_char_type (cu->language_defn, gdbarch);
5843 type = create_string_type (NULL, char_type, range_type);
5845 return set_die_type (die, type, cu);
5848 /* Handle DIES due to C code like:
5852 int (*funcp)(int a, long l);
5856 ('funcp' generates a DW_TAG_subroutine_type DIE)
5859 static struct type *
5860 read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu)
5862 struct type *type; /* Type that this function returns */
5863 struct type *ftype; /* Function that returns above type */
5864 struct attribute *attr;
5866 type = die_type (die, cu);
5867 ftype = lookup_function_type (type);
5869 /* All functions in C++, Pascal and Java have prototypes. */
5870 attr = dwarf2_attr (die, DW_AT_prototyped, cu);
5871 if ((attr && (DW_UNSND (attr) != 0))
5872 || cu->language == language_cplus
5873 || cu->language == language_java
5874 || cu->language == language_pascal)
5875 TYPE_PROTOTYPED (ftype) = 1;
5877 /* Store the calling convention in the type if it's available in
5878 the subroutine die. Otherwise set the calling convention to
5879 the default value DW_CC_normal. */
5880 attr = dwarf2_attr (die, DW_AT_calling_convention, cu);
5881 TYPE_CALLING_CONVENTION (ftype) = attr ? DW_UNSND (attr) : DW_CC_normal;
5883 /* We need to add the subroutine type to the die immediately so
5884 we don't infinitely recurse when dealing with parameters
5885 declared as the same subroutine type. */
5886 set_die_type (die, ftype, cu);
5888 if (die->child != NULL)
5890 struct die_info *child_die;
5894 /* Count the number of parameters.
5895 FIXME: GDB currently ignores vararg functions, but knows about
5896 vararg member functions. */
5897 child_die = die->child;
5898 while (child_die && child_die->tag)
5900 if (child_die->tag == DW_TAG_formal_parameter)
5902 else if (child_die->tag == DW_TAG_unspecified_parameters)
5903 TYPE_VARARGS (ftype) = 1;
5904 child_die = sibling_die (child_die);
5907 /* Allocate storage for parameters and fill them in. */
5908 TYPE_NFIELDS (ftype) = nparams;
5909 TYPE_FIELDS (ftype) = (struct field *)
5910 TYPE_ZALLOC (ftype, nparams * sizeof (struct field));
5912 child_die = die->child;
5913 while (child_die && child_die->tag)
5915 if (child_die->tag == DW_TAG_formal_parameter)
5917 /* Dwarf2 has no clean way to discern C++ static and non-static
5918 member functions. G++ helps GDB by marking the first
5919 parameter for non-static member functions (which is the
5920 this pointer) as artificial. We pass this information
5921 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5922 attr = dwarf2_attr (child_die, DW_AT_artificial, cu);
5924 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr);
5926 TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0;
5927 TYPE_FIELD_TYPE (ftype, iparams) = die_type (child_die, cu);
5930 child_die = sibling_die (child_die);
5937 static struct type *
5938 read_typedef (struct die_info *die, struct dwarf2_cu *cu)
5940 struct objfile *objfile = cu->objfile;
5941 struct attribute *attr;
5942 const char *name = NULL;
5943 struct type *this_type;
5945 name = dwarf2_full_name (die, cu);
5946 this_type = init_type (TYPE_CODE_TYPEDEF, 0,
5947 TYPE_FLAG_TARGET_STUB, NULL, objfile);
5948 TYPE_NAME (this_type) = (char *) name;
5949 set_die_type (die, this_type, cu);
5950 TYPE_TARGET_TYPE (this_type) = die_type (die, cu);
5954 /* Find a representation of a given base type and install
5955 it in the TYPE field of the die. */
5957 static struct type *
5958 read_base_type (struct die_info *die, struct dwarf2_cu *cu)
5960 struct objfile *objfile = cu->objfile;
5962 struct attribute *attr;
5963 int encoding = 0, size = 0;
5965 enum type_code code = TYPE_CODE_INT;
5967 struct type *target_type = NULL;
5969 attr = dwarf2_attr (die, DW_AT_encoding, cu);
5972 encoding = DW_UNSND (attr);
5974 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
5977 size = DW_UNSND (attr);
5979 name = dwarf2_name (die, cu);
5982 complaint (&symfile_complaints,
5983 _("DW_AT_name missing from DW_TAG_base_type"));
5988 case DW_ATE_address:
5989 /* Turn DW_ATE_address into a void * pointer. */
5990 code = TYPE_CODE_PTR;
5991 type_flags |= TYPE_FLAG_UNSIGNED;
5992 target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
5994 case DW_ATE_boolean:
5995 code = TYPE_CODE_BOOL;
5996 type_flags |= TYPE_FLAG_UNSIGNED;
5998 case DW_ATE_complex_float:
5999 code = TYPE_CODE_COMPLEX;
6000 target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile);
6002 case DW_ATE_decimal_float:
6003 code = TYPE_CODE_DECFLOAT;
6006 code = TYPE_CODE_FLT;
6010 case DW_ATE_unsigned:
6011 type_flags |= TYPE_FLAG_UNSIGNED;
6013 case DW_ATE_signed_char:
6014 if (cu->language == language_ada || cu->language == language_m2
6015 || cu->language == language_pascal)
6016 code = TYPE_CODE_CHAR;
6018 case DW_ATE_unsigned_char:
6019 if (cu->language == language_ada || cu->language == language_m2
6020 || cu->language == language_pascal)
6021 code = TYPE_CODE_CHAR;
6022 type_flags |= TYPE_FLAG_UNSIGNED;
6025 complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"),
6026 dwarf_type_encoding_name (encoding));
6030 type = init_type (code, size, type_flags, NULL, objfile);
6031 TYPE_NAME (type) = name;
6032 TYPE_TARGET_TYPE (type) = target_type;
6034 if (name && strcmp (name, "char") == 0)
6035 TYPE_NOSIGN (type) = 1;
6037 return set_die_type (die, type, cu);
6040 /* Read the given DW_AT_subrange DIE. */
6042 static struct type *
6043 read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
6045 struct gdbarch *gdbarch = get_objfile_arch (cu->objfile);
6046 struct type *base_type;
6047 struct type *range_type;
6048 struct attribute *attr;
6052 LONGEST negative_mask;
6054 base_type = die_type (die, cu);
6055 if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
6057 complaint (&symfile_complaints,
6058 _("DW_AT_type missing from DW_TAG_subrange_type"));
6060 = init_type (TYPE_CODE_INT, gdbarch_addr_bit (gdbarch) / 8,
6061 0, NULL, cu->objfile);
6064 if (cu->language == language_fortran)
6066 /* FORTRAN implies a lower bound of 1, if not given. */
6070 /* FIXME: For variable sized arrays either of these could be
6071 a variable rather than a constant value. We'll allow it,
6072 but we don't know how to handle it. */
6073 attr = dwarf2_attr (die, DW_AT_lower_bound, cu);
6075 low = dwarf2_get_attr_constant_value (attr, 0);
6077 attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
6080 if (attr->form == DW_FORM_block1)
6082 /* GCC encodes arrays with unspecified or dynamic length
6083 with a DW_FORM_block1 attribute.
6084 FIXME: GDB does not yet know how to handle dynamic
6085 arrays properly, treat them as arrays with unspecified
6088 FIXME: jimb/2003-09-22: GDB does not really know
6089 how to handle arrays of unspecified length
6090 either; we just represent them as zero-length
6091 arrays. Choose an appropriate upper bound given
6092 the lower bound we've computed above. */
6096 high = dwarf2_get_attr_constant_value (attr, 1);
6100 (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1);
6101 if (!TYPE_UNSIGNED (base_type) && (low & negative_mask))
6102 low |= negative_mask;
6103 if (!TYPE_UNSIGNED (base_type) && (high & negative_mask))
6104 high |= negative_mask;
6106 range_type = create_range_type (NULL, base_type, low, high);
6108 name = dwarf2_name (die, cu);
6110 TYPE_NAME (range_type) = name;
6112 attr = dwarf2_attr (die, DW_AT_byte_size, cu);
6114 TYPE_LENGTH (range_type) = DW_UNSND (attr);
6116 return set_die_type (die, range_type, cu);
6119 static struct type *
6120 read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu)
6124 /* For now, we only support the C meaning of an unspecified type: void. */
6126 type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile);
6127 TYPE_NAME (type) = dwarf2_name (die, cu);
6129 return set_die_type (die, type, cu);
6132 /* Trivial hash function for die_info: the hash value of a DIE
6133 is its offset in .debug_info for this objfile. */
6136 die_hash (const void *item)
6138 const struct die_info *die = item;
6142 /* Trivial comparison function for die_info structures: two DIEs
6143 are equal if they have the same offset. */
6146 die_eq (const void *item_lhs, const void *item_rhs)
6148 const struct die_info *die_lhs = item_lhs;
6149 const struct die_info *die_rhs = item_rhs;
6150 return die_lhs->offset == die_rhs->offset;
6153 /* Read a whole compilation unit into a linked list of dies. */
6155 static struct die_info *
6156 read_comp_unit (gdb_byte *info_ptr, struct dwarf2_cu *cu)
6158 struct die_reader_specs reader_specs;
6160 gdb_assert (cu->die_hash == NULL);
6162 = htab_create_alloc_ex (cu->header.length / 12,
6166 &cu->comp_unit_obstack,
6167 hashtab_obstack_allocate,
6168 dummy_obstack_deallocate);
6170 init_cu_die_reader (&reader_specs, cu);
6172 return read_die_and_children (&reader_specs, info_ptr, &info_ptr, NULL);
6175 /* Main entry point for reading a DIE and all children.
6176 Read the DIE and dump it if requested. */
6178 static struct die_info *
6179 read_die_and_children (const struct die_reader_specs *reader,
6181 gdb_byte **new_info_ptr,
6182 struct die_info *parent)
6184 struct die_info *result = read_die_and_children_1 (reader, info_ptr,
6185 new_info_ptr, parent);
6187 if (dwarf2_die_debug)
6189 fprintf_unfiltered (gdb_stdlog,
6190 "\nRead die from %s of %s:\n",
6191 reader->buffer == dwarf2_per_objfile->info.buffer
6193 : reader->buffer == dwarf2_per_objfile->types.buffer
6195 : "unknown section",
6196 reader->abfd->filename);
6197 dump_die (result, dwarf2_die_debug);
6203 /* Read a single die and all its descendents. Set the die's sibling
6204 field to NULL; set other fields in the die correctly, and set all
6205 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6206 location of the info_ptr after reading all of those dies. PARENT
6207 is the parent of the die in question. */
6209 static struct die_info *
6210 read_die_and_children_1 (const struct die_reader_specs *reader,
6212 gdb_byte **new_info_ptr,
6213 struct die_info *parent)
6215 struct die_info *die;
6219 cur_ptr = read_full_die (reader, &die, info_ptr, &has_children);
6222 *new_info_ptr = cur_ptr;
6225 store_in_ref_table (die, reader->cu);
6228 die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die);
6232 *new_info_ptr = cur_ptr;
6235 die->sibling = NULL;
6236 die->parent = parent;
6240 /* Read a die, all of its descendents, and all of its siblings; set
6241 all of the fields of all of the dies correctly. Arguments are as
6242 in read_die_and_children. */
6244 static struct die_info *
6245 read_die_and_siblings (const struct die_reader_specs *reader,
6247 gdb_byte **new_info_ptr,
6248 struct die_info *parent)
6250 struct die_info *first_die, *last_sibling;
6254 first_die = last_sibling = NULL;
6258 struct die_info *die
6259 = read_die_and_children_1 (reader, cur_ptr, &cur_ptr, parent);
6263 *new_info_ptr = cur_ptr;
6270 last_sibling->sibling = die;
6276 /* Read the die from the .debug_info section buffer. Set DIEP to
6277 point to a newly allocated die with its information, except for its
6278 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6279 whether the die has children or not. */
6282 read_full_die (const struct die_reader_specs *reader,
6283 struct die_info **diep, gdb_byte *info_ptr,
6286 unsigned int abbrev_number, bytes_read, i, offset;
6287 struct abbrev_info *abbrev;
6288 struct die_info *die;
6289 struct dwarf2_cu *cu = reader->cu;
6290 bfd *abfd = reader->abfd;
6292 offset = info_ptr - reader->buffer;
6293 abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
6294 info_ptr += bytes_read;
6302 abbrev = dwarf2_lookup_abbrev (abbrev_number, cu);
6304 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6306 bfd_get_filename (abfd));
6308 die = dwarf_alloc_die (cu, abbrev->num_attrs);
6309 die->offset = offset;
6310 die->tag = abbrev->tag;
6311 die->abbrev = abbrev_number;
6313 die->num_attrs = abbrev->num_attrs;
6315 for (i = 0; i < abbrev->num_attrs; ++i)
6316 info_ptr = read_attribute (&die->attrs[i], &abbrev->attrs[i],
6317 abfd, info_ptr, cu);
6320 *has_children = abbrev->has_children;
6324 /* In DWARF version 2, the description of the debugging information is
6325 stored in a separate .debug_abbrev section. Before we read any
6326 dies from a section we read in all abbreviations and install them
6327 in a hash table. This function also sets flags in CU describing
6328 the data found in the abbrev table. */
6331 dwarf2_read_abbrevs (bfd *abfd, struct dwarf2_cu *cu)
6333 struct comp_unit_head *cu_header = &cu->header;
6334 gdb_byte *abbrev_ptr;
6335 struct abbrev_info *cur_abbrev;
6336 unsigned int abbrev_number, bytes_read, abbrev_name;
6337 unsigned int abbrev_form, hash_number;
6338 struct attr_abbrev *cur_attrs;
6339 unsigned int allocated_attrs;
6341 /* Initialize dwarf2 abbrevs */
6342 obstack_init (&cu->abbrev_obstack);
6343 cu->dwarf2_abbrevs = obstack_alloc (&cu->abbrev_obstack,
6345 * sizeof (struct abbrev_info *)));
6346 memset (cu->dwarf2_abbrevs, 0,
6347 ABBREV_HASH_SIZE * sizeof (struct abbrev_info *));
6349 abbrev_ptr = dwarf2_per_objfile->abbrev.buffer + cu_header->abbrev_offset;
6350 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6351 abbrev_ptr += bytes_read;
6353 allocated_attrs = ATTR_ALLOC_CHUNK;
6354 cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev));
6356 /* loop until we reach an abbrev number of 0 */
6357 while (abbrev_number)
6359 cur_abbrev = dwarf_alloc_abbrev (cu);
6361 /* read in abbrev header */
6362 cur_abbrev->number = abbrev_number;
6363 cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6364 abbrev_ptr += bytes_read;
6365 cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr);
6368 if (cur_abbrev->tag == DW_TAG_namespace)
6369 cu->has_namespace_info = 1;
6371 /* now read in declarations */
6372 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6373 abbrev_ptr += bytes_read;
6374 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6375 abbrev_ptr += bytes_read;
6378 if (cur_abbrev->num_attrs == allocated_attrs)
6380 allocated_attrs += ATTR_ALLOC_CHUNK;
6382 = xrealloc (cur_attrs, (allocated_attrs
6383 * sizeof (struct attr_abbrev)));
6386 /* Record whether this compilation unit might have
6387 inter-compilation-unit references. If we don't know what form
6388 this attribute will have, then it might potentially be a
6389 DW_FORM_ref_addr, so we conservatively expect inter-CU
6392 if (abbrev_form == DW_FORM_ref_addr
6393 || abbrev_form == DW_FORM_indirect)
6394 cu->has_form_ref_addr = 1;
6396 cur_attrs[cur_abbrev->num_attrs].name = abbrev_name;
6397 cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form;
6398 abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6399 abbrev_ptr += bytes_read;
6400 abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6401 abbrev_ptr += bytes_read;
6404 cur_abbrev->attrs = obstack_alloc (&cu->abbrev_obstack,
6405 (cur_abbrev->num_attrs
6406 * sizeof (struct attr_abbrev)));
6407 memcpy (cur_abbrev->attrs, cur_attrs,
6408 cur_abbrev->num_attrs * sizeof (struct attr_abbrev));
6410 hash_number = abbrev_number % ABBREV_HASH_SIZE;
6411 cur_abbrev->next = cu->dwarf2_abbrevs[hash_number];
6412 cu->dwarf2_abbrevs[hash_number] = cur_abbrev;
6414 /* Get next abbreviation.
6415 Under Irix6 the abbreviations for a compilation unit are not
6416 always properly terminated with an abbrev number of 0.
6417 Exit loop if we encounter an abbreviation which we have
6418 already read (which means we are about to read the abbreviations
6419 for the next compile unit) or if the end of the abbreviation
6420 table is reached. */
6421 if ((unsigned int) (abbrev_ptr - dwarf2_per_objfile->abbrev.buffer)
6422 >= dwarf2_per_objfile->abbrev.size)
6424 abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
6425 abbrev_ptr += bytes_read;
6426 if (dwarf2_lookup_abbrev (abbrev_number, cu) != NULL)
6433 /* Release the memory used by the abbrev table for a compilation unit. */
6436 dwarf2_free_abbrev_table (void *ptr_to_cu)
6438 struct dwarf2_cu *cu = ptr_to_cu;
6440 obstack_free (&cu->abbrev_obstack, NULL);
6441 cu->dwarf2_abbrevs = NULL;
6444 /* Lookup an abbrev_info structure in the abbrev hash table. */
6446 static struct abbrev_info *
6447 dwarf2_lookup_abbrev (unsigned int number, struct dwarf2_cu *cu)
6449 unsigned int hash_number;
6450 struct abbrev_info *abbrev;
6452 hash_number = number % ABBREV_HASH_SIZE;
6453 abbrev = cu->dwarf2_abbrevs[hash_number];
6457 if (abbrev->number == number)
6460 abbrev = abbrev->next;
6465 /* Returns nonzero if TAG represents a type that we might generate a partial
6469 is_type_tag_for_partial (int tag)
6474 /* Some types that would be reasonable to generate partial symbols for,
6475 that we don't at present. */
6476 case DW_TAG_array_type:
6477 case DW_TAG_file_type:
6478 case DW_TAG_ptr_to_member_type:
6479 case DW_TAG_set_type:
6480 case DW_TAG_string_type:
6481 case DW_TAG_subroutine_type:
6483 case DW_TAG_base_type:
6484 case DW_TAG_class_type:
6485 case DW_TAG_interface_type:
6486 case DW_TAG_enumeration_type:
6487 case DW_TAG_structure_type:
6488 case DW_TAG_subrange_type:
6489 case DW_TAG_typedef:
6490 case DW_TAG_union_type:
6497 /* Load all DIEs that are interesting for partial symbols into memory. */
6499 static struct partial_die_info *
6500 load_partial_dies (bfd *abfd, gdb_byte *buffer, gdb_byte *info_ptr,
6501 int building_psymtab, struct dwarf2_cu *cu)
6503 struct partial_die_info *part_die;
6504 struct partial_die_info *parent_die, *last_die, *first_die = NULL;
6505 struct abbrev_info *abbrev;
6506 unsigned int bytes_read;
6507 unsigned int load_all = 0;
6509 int nesting_level = 1;
6514 if (cu->per_cu && cu->per_cu->load_all_dies)
6518 = htab_create_alloc_ex (cu->header.length / 12,
6522 &cu->comp_unit_obstack,
6523 hashtab_obstack_allocate,
6524 dummy_obstack_deallocate);
6526 part_die = obstack_alloc (&cu->comp_unit_obstack,
6527 sizeof (struct partial_die_info));
6531 abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu);
6533 /* A NULL abbrev means the end of a series of children. */
6536 if (--nesting_level == 0)
6538 /* PART_DIE was probably the last thing allocated on the
6539 comp_unit_obstack, so we could call obstack_free
6540 here. We don't do that because the waste is small,
6541 and will be cleaned up when we're done with this
6542 compilation unit. This way, we're also more robust
6543 against other users of the comp_unit_obstack. */
6546 info_ptr += bytes_read;
6547 last_die = parent_die;
6548 parent_die = parent_die->die_parent;
6552 /* Check whether this DIE is interesting enough to save. Normally
6553 we would not be interested in members here, but there may be
6554 later variables referencing them via DW_AT_specification (for
6557 && !is_type_tag_for_partial (abbrev->tag)
6558 && abbrev->tag != DW_TAG_enumerator
6559 && abbrev->tag != DW_TAG_subprogram
6560 && abbrev->tag != DW_TAG_lexical_block
6561 && abbrev->tag != DW_TAG_variable
6562 && abbrev->tag != DW_TAG_namespace
6563 && abbrev->tag != DW_TAG_member)
6565 /* Otherwise we skip to the next sibling, if any. */
6566 info_ptr = skip_one_die (buffer, info_ptr + bytes_read, abbrev, cu);
6570 info_ptr = read_partial_die (part_die, abbrev, bytes_read, abfd,
6571 buffer, info_ptr, cu);
6573 /* This two-pass algorithm for processing partial symbols has a
6574 high cost in cache pressure. Thus, handle some simple cases
6575 here which cover the majority of C partial symbols. DIEs
6576 which neither have specification tags in them, nor could have
6577 specification tags elsewhere pointing at them, can simply be
6578 processed and discarded.
6580 This segment is also optional; scan_partial_symbols and
6581 add_partial_symbol will handle these DIEs if we chain
6582 them in normally. When compilers which do not emit large
6583 quantities of duplicate debug information are more common,
6584 this code can probably be removed. */
6586 /* Any complete simple types at the top level (pretty much all
6587 of them, for a language without namespaces), can be processed
6589 if (parent_die == NULL
6590 && part_die->has_specification == 0
6591 && part_die->is_declaration == 0
6592 && (part_die->tag == DW_TAG_typedef
6593 || part_die->tag == DW_TAG_base_type
6594 || part_die->tag == DW_TAG_subrange_type))
6596 if (building_psymtab && part_die->name != NULL)
6597 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6598 VAR_DOMAIN, LOC_TYPEDEF,
6599 &cu->objfile->static_psymbols,
6600 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6601 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6605 /* If we're at the second level, and we're an enumerator, and
6606 our parent has no specification (meaning possibly lives in a
6607 namespace elsewhere), then we can add the partial symbol now
6608 instead of queueing it. */
6609 if (part_die->tag == DW_TAG_enumerator
6610 && parent_die != NULL
6611 && parent_die->die_parent == NULL
6612 && parent_die->tag == DW_TAG_enumeration_type
6613 && parent_die->has_specification == 0)
6615 if (part_die->name == NULL)
6616 complaint (&symfile_complaints, _("malformed enumerator DIE ignored"));
6617 else if (building_psymtab)
6618 add_psymbol_to_list (part_die->name, strlen (part_die->name), 0,
6619 VAR_DOMAIN, LOC_CONST,
6620 (cu->language == language_cplus
6621 || cu->language == language_java)
6622 ? &cu->objfile->global_psymbols
6623 : &cu->objfile->static_psymbols,
6624 0, (CORE_ADDR) 0, cu->language, cu->objfile);
6626 info_ptr = locate_pdi_sibling (part_die, buffer, info_ptr, abfd, cu);
6630 /* We'll save this DIE so link it in. */
6631 part_die->die_parent = parent_die;
6632 part_die->die_sibling = NULL;
6633 part_die->die_child = NULL;
6635 if (last_die && last_die == parent_die)
6636 last_die->die_child = part_die;
6638 last_die->die_sibling = part_die;
6640 last_die = part_die;
6642 if (first_die == NULL)
6643 first_die = part_die;
6645 /* Maybe add the DIE to the hash table. Not all DIEs that we
6646 find interesting need to be in the hash table, because we
6647 also have the parent/sibling/child chains; only those that we
6648 might refer to by offset later during partial symbol reading.
6650 For now this means things that might have be the target of a
6651 DW_AT_specification, DW_AT_abstract_origin, or
6652 DW_AT_extension. DW_AT_extension will refer only to
6653 namespaces; DW_AT_abstract_origin refers to functions (and
6654 many things under the function DIE, but we do not recurse
6655 into function DIEs during partial symbol reading) and
6656 possibly variables as well; DW_AT_specification refers to
6657 declarations. Declarations ought to have the DW_AT_declaration
6658 flag. It happens that GCC forgets to put it in sometimes, but
6659 only for functions, not for types.
6661 Adding more things than necessary to the hash table is harmless
6662 except for the performance cost. Adding too few will result in
6663 wasted time in find_partial_die, when we reread the compilation
6664 unit with load_all_dies set. */
6667 || abbrev->tag == DW_TAG_subprogram
6668 || abbrev->tag == DW_TAG_variable
6669 || abbrev->tag == DW_TAG_namespace
6670 || part_die->is_declaration)
6674 slot = htab_find_slot_with_hash (cu->partial_dies, part_die,
6675 part_die->offset, INSERT);
6679 part_die = obstack_alloc (&cu->comp_unit_obstack,
6680 sizeof (struct partial_die_info));
6682 /* For some DIEs we want to follow their children (if any). For C
6683 we have no reason to follow the children of structures; for other
6684 languages we have to, both so that we can get at method physnames
6685 to infer fully qualified class names, and for DW_AT_specification.
6687 For Ada, we need to scan the children of subprograms and lexical
6688 blocks as well because Ada allows the definition of nested
6689 entities that could be interesting for the debugger, such as
6690 nested subprograms for instance. */
6691 if (last_die->has_children
6693 || last_die->tag == DW_TAG_namespace
6694 || last_die->tag == DW_TAG_enumeration_type
6695 || (cu->language != language_c
6696 && (last_die->tag == DW_TAG_class_type
6697 || last_die->tag == DW_TAG_interface_type
6698 || last_die->tag == DW_TAG_structure_type
6699 || last_die->tag == DW_TAG_union_type))
6700 || (cu->language == language_ada
6701 && (last_die->tag == DW_TAG_subprogram
6702 || last_die->tag == DW_TAG_lexical_block))))
6705 parent_die = last_die;
6709 /* Otherwise we skip to the next sibling, if any. */
6710 info_ptr = locate_pdi_sibling (last_die, buffer, info_ptr, abfd, cu);
6712 /* Back to the top, do it again. */
6716 /* Read a minimal amount of information into the minimal die structure. */
6719 read_partial_die (struct partial_die_info *part_die,
6720 struct abbrev_info *abbrev,
6721 unsigned int abbrev_len, bfd *abfd,
6722 gdb_byte *buffer, gdb_byte *info_ptr,
6723 struct dwarf2_cu *cu)
6725 unsigned int bytes_read, i;
6726 struct attribute attr;
6727 int has_low_pc_attr = 0;
6728 int has_high_pc_attr = 0;
6730 memset (part_die, 0, sizeof (struct partial_die_info));
6732 part_die->offset = info_ptr - buffer;
6734 info_ptr += abbrev_len;
6739 part_die->tag = abbrev->tag;
6740 part_die->has_children = abbrev->has_children;
6742 for (i = 0; i < abbrev->num_attrs; ++i)
6744 info_ptr = read_attribute (&attr, &abbrev->attrs[i], abfd, info_ptr, cu);
6746 /* Store the data if it is of an attribute we want to keep in a
6747 partial symbol table. */
6751 switch (part_die->tag)
6753 case DW_TAG_compile_unit:
6754 case DW_TAG_type_unit:
6755 /* Compilation units have a DW_AT_name that is a filename, not
6756 a source language identifier. */
6757 case DW_TAG_enumeration_type:
6758 case DW_TAG_enumerator:
6759 /* These tags always have simple identifiers already; no need
6760 to canonicalize them. */
6761 part_die->name = DW_STRING (&attr);
6765 = dwarf2_canonicalize_name (DW_STRING (&attr), cu,
6766 &cu->comp_unit_obstack);
6770 case DW_AT_MIPS_linkage_name:
6771 part_die->name = DW_STRING (&attr);
6774 has_low_pc_attr = 1;
6775 part_die->lowpc = DW_ADDR (&attr);
6778 has_high_pc_attr = 1;
6779 part_die->highpc = DW_ADDR (&attr);
6781 case DW_AT_location:
6782 /* Support the .debug_loc offsets */
6783 if (attr_form_is_block (&attr))
6785 part_die->locdesc = DW_BLOCK (&attr);
6787 else if (attr_form_is_section_offset (&attr))
6789 dwarf2_complex_location_expr_complaint ();
6793 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6794 "partial symbol information");
6797 case DW_AT_external:
6798 part_die->is_external = DW_UNSND (&attr);
6800 case DW_AT_declaration:
6801 part_die->is_declaration = DW_UNSND (&attr);
6804 part_die->has_type = 1;
6806 case DW_AT_abstract_origin:
6807 case DW_AT_specification:
6808 case DW_AT_extension:
6809 part_die->has_specification = 1;
6810 part_die->spec_offset = dwarf2_get_ref_die_offset (&attr);
6813 /* Ignore absolute siblings, they might point outside of
6814 the current compile unit. */
6815 if (attr.form == DW_FORM_ref_addr)
6816 complaint (&symfile_complaints, _("ignoring absolute DW_AT_sibling"));
6818 part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr);
6820 case DW_AT_byte_size:
6821 part_die->has_byte_size = 1;
6823 case DW_AT_calling_convention:
6824 /* DWARF doesn't provide a way to identify a program's source-level
6825 entry point. DW_AT_calling_convention attributes are only meant
6826 to describe functions' calling conventions.
6828 However, because it's a necessary piece of information in
6829 Fortran, and because DW_CC_program is the only piece of debugging
6830 information whose definition refers to a 'main program' at all,
6831 several compilers have begun marking Fortran main programs with
6832 DW_CC_program --- even when those functions use the standard
6833 calling conventions.
6835 So until DWARF specifies a way to provide this information and
6836 compilers pick up the new representation, we'll support this
6838 if (DW_UNSND (&attr) == DW_CC_program
6839 && cu->language == language_fortran)
6840 set_main_name (part_die->name);
6847 /* When using the GNU linker, .gnu.linkonce. sections are used to
6848 eliminate duplicate copies of functions and vtables and such.
6849 The linker will arbitrarily choose one and discard the others.
6850 The AT_*_pc values for such functions refer to local labels in
6851 these sections. If the section from that file was discarded, the
6852 labels are not in the output, so the relocs get a value of 0.
6853 If this is a discarded function, mark the pc bounds as invalid,
6854 so that GDB will ignore it. */
6855 if (has_low_pc_attr && has_high_pc_attr
6856 && part_die->lowpc < part_die->highpc
6857 && (part_die->lowpc != 0
6858 || dwarf2_per_objfile->has_section_at_zero))
6859 part_die->has_pc_info = 1;
6864 /* Find a cached partial DIE at OFFSET in CU. */
6866 static struct partial_die_info *
6867 find_partial_die_in_comp_unit (unsigned int offset, struct dwarf2_cu *cu)
6869 struct partial_die_info *lookup_die = NULL;
6870 struct partial_die_info part_die;
6872 part_die.offset = offset;
6873 lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, offset);
6878 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6879 except in the case of .debug_types DIEs which do not reference
6880 outside their CU (they do however referencing other types via
6883 static struct partial_die_info *
6884 find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
6886 struct dwarf2_per_cu_data *per_cu = NULL;
6887 struct partial_die_info *pd = NULL;
6889 if (cu->per_cu->from_debug_types)
6891 pd = find_partial_die_in_comp_unit (offset, cu);
6897 if (offset_in_cu_p (&cu->header, offset))
6899 pd = find_partial_die_in_comp_unit (offset, cu);
6904 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
6906 if (per_cu->cu == NULL)
6908 load_partial_comp_unit (per_cu, cu->objfile);
6909 per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
6910 dwarf2_per_objfile->read_in_chain = per_cu;
6913 per_cu->cu->last_used = 0;
6914 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6916 if (pd == NULL && per_cu->load_all_dies == 0)
6918 struct cleanup *back_to;
6919 struct partial_die_info comp_unit_die;
6920 struct abbrev_info *abbrev;
6921 unsigned int bytes_read;
6924 per_cu->load_all_dies = 1;
6926 /* Re-read the DIEs. */
6927 back_to = make_cleanup (null_cleanup, 0);
6928 if (per_cu->cu->dwarf2_abbrevs == NULL)
6930 dwarf2_read_abbrevs (per_cu->cu->objfile->obfd, per_cu->cu);
6931 make_cleanup (dwarf2_free_abbrev_table, per_cu->cu);
6933 info_ptr = (dwarf2_per_objfile->info.buffer
6934 + per_cu->cu->header.offset
6935 + per_cu->cu->header.first_die_offset);
6936 abbrev = peek_die_abbrev (info_ptr, &bytes_read, per_cu->cu);
6937 info_ptr = read_partial_die (&comp_unit_die, abbrev, bytes_read,
6938 per_cu->cu->objfile->obfd,
6939 dwarf2_per_objfile->info.buffer, info_ptr,
6941 if (comp_unit_die.has_children)
6942 load_partial_dies (per_cu->cu->objfile->obfd,
6943 dwarf2_per_objfile->info.buffer, info_ptr,
6945 do_cleanups (back_to);
6947 pd = find_partial_die_in_comp_unit (offset, per_cu->cu);
6953 internal_error (__FILE__, __LINE__,
6954 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6955 offset, bfd_get_filename (cu->objfile->obfd));
6959 /* Adjust PART_DIE before generating a symbol for it. This function
6960 may set the is_external flag or change the DIE's name. */
6963 fixup_partial_die (struct partial_die_info *part_die,
6964 struct dwarf2_cu *cu)
6966 /* If we found a reference attribute and the DIE has no name, try
6967 to find a name in the referred to DIE. */
6969 if (part_die->name == NULL && part_die->has_specification)
6971 struct partial_die_info *spec_die;
6973 spec_die = find_partial_die (part_die->spec_offset, cu);
6975 fixup_partial_die (spec_die, cu);
6979 part_die->name = spec_die->name;
6981 /* Copy DW_AT_external attribute if it is set. */
6982 if (spec_die->is_external)
6983 part_die->is_external = spec_die->is_external;
6987 /* Set default names for some unnamed DIEs. */
6988 if (part_die->name == NULL && (part_die->tag == DW_TAG_structure_type
6989 || part_die->tag == DW_TAG_class_type))
6990 part_die->name = "(anonymous class)";
6992 if (part_die->name == NULL && part_die->tag == DW_TAG_namespace)
6993 part_die->name = "(anonymous namespace)";
6995 if (part_die->tag == DW_TAG_structure_type
6996 || part_die->tag == DW_TAG_class_type
6997 || part_die->tag == DW_TAG_union_type)
6998 guess_structure_name (part_die, cu);
7001 /* Read an attribute value described by an attribute form. */
7004 read_attribute_value (struct attribute *attr, unsigned form,
7005 bfd *abfd, gdb_byte *info_ptr,
7006 struct dwarf2_cu *cu)
7008 struct comp_unit_head *cu_header = &cu->header;
7009 unsigned int bytes_read;
7010 struct dwarf_block *blk;
7016 case DW_FORM_ref_addr:
7017 DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read);
7018 info_ptr += bytes_read;
7020 case DW_FORM_block2:
7021 blk = dwarf_alloc_block (cu);
7022 blk->size = read_2_bytes (abfd, info_ptr);
7024 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7025 info_ptr += blk->size;
7026 DW_BLOCK (attr) = blk;
7028 case DW_FORM_block4:
7029 blk = dwarf_alloc_block (cu);
7030 blk->size = read_4_bytes (abfd, info_ptr);
7032 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7033 info_ptr += blk->size;
7034 DW_BLOCK (attr) = blk;
7037 DW_UNSND (attr) = read_2_bytes (abfd, info_ptr);
7041 DW_UNSND (attr) = read_4_bytes (abfd, info_ptr);
7045 DW_UNSND (attr) = read_8_bytes (abfd, info_ptr);
7048 case DW_FORM_string:
7049 DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read);
7050 DW_STRING_IS_CANONICAL (attr) = 0;
7051 info_ptr += bytes_read;
7054 DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header,
7056 DW_STRING_IS_CANONICAL (attr) = 0;
7057 info_ptr += bytes_read;
7060 blk = dwarf_alloc_block (cu);
7061 blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7062 info_ptr += bytes_read;
7063 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7064 info_ptr += blk->size;
7065 DW_BLOCK (attr) = blk;
7067 case DW_FORM_block1:
7068 blk = dwarf_alloc_block (cu);
7069 blk->size = read_1_byte (abfd, info_ptr);
7071 blk->data = read_n_bytes (abfd, info_ptr, blk->size);
7072 info_ptr += blk->size;
7073 DW_BLOCK (attr) = blk;
7076 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7080 DW_UNSND (attr) = read_1_byte (abfd, info_ptr);
7084 DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read);
7085 info_ptr += bytes_read;
7088 DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7089 info_ptr += bytes_read;
7092 DW_ADDR (attr) = cu->header.offset + read_1_byte (abfd, info_ptr);
7096 DW_ADDR (attr) = cu->header.offset + read_2_bytes (abfd, info_ptr);
7100 DW_ADDR (attr) = cu->header.offset + read_4_bytes (abfd, info_ptr);
7104 DW_ADDR (attr) = cu->header.offset + read_8_bytes (abfd, info_ptr);
7108 /* Convert the signature to something we can record in DW_UNSND
7110 NOTE: This is NULL if the type wasn't found. */
7111 DW_SIGNATURED_TYPE (attr) =
7112 lookup_signatured_type (cu->objfile, read_8_bytes (abfd, info_ptr));
7115 case DW_FORM_ref_udata:
7116 DW_ADDR (attr) = (cu->header.offset
7117 + read_unsigned_leb128 (abfd, info_ptr, &bytes_read));
7118 info_ptr += bytes_read;
7120 case DW_FORM_indirect:
7121 form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read);
7122 info_ptr += bytes_read;
7123 info_ptr = read_attribute_value (attr, form, abfd, info_ptr, cu);
7126 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7127 dwarf_form_name (form),
7128 bfd_get_filename (abfd));
7131 /* We have seen instances where the compiler tried to emit a byte
7132 size attribute of -1 which ended up being encoded as an unsigned
7133 0xffffffff. Although 0xffffffff is technically a valid size value,
7134 an object of this size seems pretty unlikely so we can relatively
7135 safely treat these cases as if the size attribute was invalid and
7136 treat them as zero by default. */
7137 if (attr->name == DW_AT_byte_size
7138 && form == DW_FORM_data4
7139 && DW_UNSND (attr) >= 0xffffffff)
7142 (&symfile_complaints,
7143 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7144 hex_string (DW_UNSND (attr)));
7145 DW_UNSND (attr) = 0;
7151 /* Read an attribute described by an abbreviated attribute. */
7154 read_attribute (struct attribute *attr, struct attr_abbrev *abbrev,
7155 bfd *abfd, gdb_byte *info_ptr, struct dwarf2_cu *cu)
7157 attr->name = abbrev->name;
7158 return read_attribute_value (attr, abbrev->form, abfd, info_ptr, cu);
7161 /* read dwarf information from a buffer */
7164 read_1_byte (bfd *abfd, gdb_byte *buf)
7166 return bfd_get_8 (abfd, buf);
7170 read_1_signed_byte (bfd *abfd, gdb_byte *buf)
7172 return bfd_get_signed_8 (abfd, buf);
7176 read_2_bytes (bfd *abfd, gdb_byte *buf)
7178 return bfd_get_16 (abfd, buf);
7182 read_2_signed_bytes (bfd *abfd, gdb_byte *buf)
7184 return bfd_get_signed_16 (abfd, buf);
7188 read_4_bytes (bfd *abfd, gdb_byte *buf)
7190 return bfd_get_32 (abfd, buf);
7194 read_4_signed_bytes (bfd *abfd, gdb_byte *buf)
7196 return bfd_get_signed_32 (abfd, buf);
7200 read_8_bytes (bfd *abfd, gdb_byte *buf)
7202 return bfd_get_64 (abfd, buf);
7206 read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu,
7207 unsigned int *bytes_read)
7209 struct comp_unit_head *cu_header = &cu->header;
7210 CORE_ADDR retval = 0;
7212 if (cu_header->signed_addr_p)
7214 switch (cu_header->addr_size)
7217 retval = bfd_get_signed_16 (abfd, buf);
7220 retval = bfd_get_signed_32 (abfd, buf);
7223 retval = bfd_get_signed_64 (abfd, buf);
7226 internal_error (__FILE__, __LINE__,
7227 _("read_address: bad switch, signed [in module %s]"),
7228 bfd_get_filename (abfd));
7233 switch (cu_header->addr_size)
7236 retval = bfd_get_16 (abfd, buf);
7239 retval = bfd_get_32 (abfd, buf);
7242 retval = bfd_get_64 (abfd, buf);
7245 internal_error (__FILE__, __LINE__,
7246 _("read_address: bad switch, unsigned [in module %s]"),
7247 bfd_get_filename (abfd));
7251 *bytes_read = cu_header->addr_size;
7255 /* Read the initial length from a section. The (draft) DWARF 3
7256 specification allows the initial length to take up either 4 bytes
7257 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7258 bytes describe the length and all offsets will be 8 bytes in length
7261 An older, non-standard 64-bit format is also handled by this
7262 function. The older format in question stores the initial length
7263 as an 8-byte quantity without an escape value. Lengths greater
7264 than 2^32 aren't very common which means that the initial 4 bytes
7265 is almost always zero. Since a length value of zero doesn't make
7266 sense for the 32-bit format, this initial zero can be considered to
7267 be an escape value which indicates the presence of the older 64-bit
7268 format. As written, the code can't detect (old format) lengths
7269 greater than 4GB. If it becomes necessary to handle lengths
7270 somewhat larger than 4GB, we could allow other small values (such
7271 as the non-sensical values of 1, 2, and 3) to also be used as
7272 escape values indicating the presence of the old format.
7274 The value returned via bytes_read should be used to increment the
7275 relevant pointer after calling read_initial_length().
7277 [ Note: read_initial_length() and read_offset() are based on the
7278 document entitled "DWARF Debugging Information Format", revision
7279 3, draft 8, dated November 19, 2001. This document was obtained
7282 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7284 This document is only a draft and is subject to change. (So beware.)
7286 Details regarding the older, non-standard 64-bit format were
7287 determined empirically by examining 64-bit ELF files produced by
7288 the SGI toolchain on an IRIX 6.5 machine.
7290 - Kevin, July 16, 2002
7294 read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read)
7296 LONGEST length = bfd_get_32 (abfd, buf);
7298 if (length == 0xffffffff)
7300 length = bfd_get_64 (abfd, buf + 4);
7303 else if (length == 0)
7305 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7306 length = bfd_get_64 (abfd, buf);
7317 /* Cover function for read_initial_length.
7318 Returns the length of the object at BUF, and stores the size of the
7319 initial length in *BYTES_READ and stores the size that offsets will be in
7321 If the initial length size is not equivalent to that specified in
7322 CU_HEADER then issue a complaint.
7323 This is useful when reading non-comp-unit headers. */
7326 read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf,
7327 const struct comp_unit_head *cu_header,
7328 unsigned int *bytes_read,
7329 unsigned int *offset_size)
7331 LONGEST length = read_initial_length (abfd, buf, bytes_read);
7333 gdb_assert (cu_header->initial_length_size == 4
7334 || cu_header->initial_length_size == 8
7335 || cu_header->initial_length_size == 12);
7337 if (cu_header->initial_length_size != *bytes_read)
7338 complaint (&symfile_complaints,
7339 _("intermixed 32-bit and 64-bit DWARF sections"));
7341 *offset_size = (*bytes_read == 4) ? 4 : 8;
7345 /* Read an offset from the data stream. The size of the offset is
7346 given by cu_header->offset_size. */
7349 read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header,
7350 unsigned int *bytes_read)
7352 LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size);
7353 *bytes_read = cu_header->offset_size;
7357 /* Read an offset from the data stream. */
7360 read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size)
7364 switch (offset_size)
7367 retval = bfd_get_32 (abfd, buf);
7370 retval = bfd_get_64 (abfd, buf);
7373 internal_error (__FILE__, __LINE__,
7374 _("read_offset_1: bad switch [in module %s]"),
7375 bfd_get_filename (abfd));
7382 read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size)
7384 /* If the size of a host char is 8 bits, we can return a pointer
7385 to the buffer, otherwise we have to copy the data to a buffer
7386 allocated on the temporary obstack. */
7387 gdb_assert (HOST_CHAR_BIT == 8);
7392 read_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7394 /* If the size of a host char is 8 bits, we can return a pointer
7395 to the string, otherwise we have to copy the string to a buffer
7396 allocated on the temporary obstack. */
7397 gdb_assert (HOST_CHAR_BIT == 8);
7400 *bytes_read_ptr = 1;
7403 *bytes_read_ptr = strlen ((char *) buf) + 1;
7404 return (char *) buf;
7408 read_indirect_string (bfd *abfd, gdb_byte *buf,
7409 const struct comp_unit_head *cu_header,
7410 unsigned int *bytes_read_ptr)
7412 LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr);
7414 if (dwarf2_per_objfile->str.buffer == NULL)
7416 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7417 bfd_get_filename (abfd));
7420 if (str_offset >= dwarf2_per_objfile->str.size)
7422 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7423 bfd_get_filename (abfd));
7426 gdb_assert (HOST_CHAR_BIT == 8);
7427 if (dwarf2_per_objfile->str.buffer[str_offset] == '\0')
7429 return (char *) (dwarf2_per_objfile->str.buffer + str_offset);
7432 static unsigned long
7433 read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7435 unsigned long result;
7436 unsigned int num_read;
7446 byte = bfd_get_8 (abfd, buf);
7449 result |= ((unsigned long)(byte & 127) << shift);
7450 if ((byte & 128) == 0)
7456 *bytes_read_ptr = num_read;
7461 read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr)
7464 int i, shift, num_read;
7473 byte = bfd_get_8 (abfd, buf);
7476 result |= ((long)(byte & 127) << shift);
7478 if ((byte & 128) == 0)
7483 if ((shift < 8 * sizeof (result)) && (byte & 0x40))
7484 result |= -(((long)1) << shift);
7485 *bytes_read_ptr = num_read;
7489 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7492 skip_leb128 (bfd *abfd, gdb_byte *buf)
7498 byte = bfd_get_8 (abfd, buf);
7500 if ((byte & 128) == 0)
7506 set_cu_language (unsigned int lang, struct dwarf2_cu *cu)
7513 cu->language = language_c;
7515 case DW_LANG_C_plus_plus:
7516 cu->language = language_cplus;
7518 case DW_LANG_Fortran77:
7519 case DW_LANG_Fortran90:
7520 case DW_LANG_Fortran95:
7521 cu->language = language_fortran;
7523 case DW_LANG_Mips_Assembler:
7524 cu->language = language_asm;
7527 cu->language = language_java;
7531 cu->language = language_ada;
7533 case DW_LANG_Modula2:
7534 cu->language = language_m2;
7536 case DW_LANG_Pascal83:
7537 cu->language = language_pascal;
7540 cu->language = language_objc;
7542 case DW_LANG_Cobol74:
7543 case DW_LANG_Cobol85:
7545 cu->language = language_minimal;
7548 cu->language_defn = language_def (cu->language);
7551 /* Return the named attribute or NULL if not there. */
7553 static struct attribute *
7554 dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu)
7557 struct attribute *spec = NULL;
7559 for (i = 0; i < die->num_attrs; ++i)
7561 if (die->attrs[i].name == name)
7562 return &die->attrs[i];
7563 if (die->attrs[i].name == DW_AT_specification
7564 || die->attrs[i].name == DW_AT_abstract_origin)
7565 spec = &die->attrs[i];
7570 die = follow_die_ref (die, spec, &cu);
7571 return dwarf2_attr (die, name, cu);
7577 /* Return the named attribute or NULL if not there,
7578 but do not follow DW_AT_specification, etc.
7579 This is for use in contexts where we're reading .debug_types dies.
7580 Following DW_AT_specification, DW_AT_abstract_origin will take us
7581 back up the chain, and we want to go down. */
7583 static struct attribute *
7584 dwarf2_attr_no_follow (struct die_info *die, unsigned int name,
7585 struct dwarf2_cu *cu)
7589 for (i = 0; i < die->num_attrs; ++i)
7590 if (die->attrs[i].name == name)
7591 return &die->attrs[i];
7596 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7597 and holds a non-zero value. This function should only be used for
7598 DW_FORM_flag attributes. */
7601 dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu)
7603 struct attribute *attr = dwarf2_attr (die, name, cu);
7605 return (attr && DW_UNSND (attr));
7609 die_is_declaration (struct die_info *die, struct dwarf2_cu *cu)
7611 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7612 which value is non-zero. However, we have to be careful with
7613 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7614 (via dwarf2_flag_true_p) follows this attribute. So we may
7615 end up accidently finding a declaration attribute that belongs
7616 to a different DIE referenced by the specification attribute,
7617 even though the given DIE does not have a declaration attribute. */
7618 return (dwarf2_flag_true_p (die, DW_AT_declaration, cu)
7619 && dwarf2_attr (die, DW_AT_specification, cu) == NULL);
7622 /* Return the die giving the specification for DIE, if there is
7623 one. *SPEC_CU is the CU containing DIE on input, and the CU
7624 containing the return value on output. If there is no
7625 specification, but there is an abstract origin, that is
7628 static struct die_info *
7629 die_specification (struct die_info *die, struct dwarf2_cu **spec_cu)
7631 struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification,
7634 if (spec_attr == NULL)
7635 spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu);
7637 if (spec_attr == NULL)
7640 return follow_die_ref (die, spec_attr, spec_cu);
7643 /* Free the line_header structure *LH, and any arrays and strings it
7646 free_line_header (struct line_header *lh)
7648 if (lh->standard_opcode_lengths)
7649 xfree (lh->standard_opcode_lengths);
7651 /* Remember that all the lh->file_names[i].name pointers are
7652 pointers into debug_line_buffer, and don't need to be freed. */
7654 xfree (lh->file_names);
7656 /* Similarly for the include directory names. */
7657 if (lh->include_dirs)
7658 xfree (lh->include_dirs);
7664 /* Add an entry to LH's include directory table. */
7666 add_include_dir (struct line_header *lh, char *include_dir)
7668 /* Grow the array if necessary. */
7669 if (lh->include_dirs_size == 0)
7671 lh->include_dirs_size = 1; /* for testing */
7672 lh->include_dirs = xmalloc (lh->include_dirs_size
7673 * sizeof (*lh->include_dirs));
7675 else if (lh->num_include_dirs >= lh->include_dirs_size)
7677 lh->include_dirs_size *= 2;
7678 lh->include_dirs = xrealloc (lh->include_dirs,
7679 (lh->include_dirs_size
7680 * sizeof (*lh->include_dirs)));
7683 lh->include_dirs[lh->num_include_dirs++] = include_dir;
7687 /* Add an entry to LH's file name table. */
7689 add_file_name (struct line_header *lh,
7691 unsigned int dir_index,
7692 unsigned int mod_time,
7693 unsigned int length)
7695 struct file_entry *fe;
7697 /* Grow the array if necessary. */
7698 if (lh->file_names_size == 0)
7700 lh->file_names_size = 1; /* for testing */
7701 lh->file_names = xmalloc (lh->file_names_size
7702 * sizeof (*lh->file_names));
7704 else if (lh->num_file_names >= lh->file_names_size)
7706 lh->file_names_size *= 2;
7707 lh->file_names = xrealloc (lh->file_names,
7708 (lh->file_names_size
7709 * sizeof (*lh->file_names)));
7712 fe = &lh->file_names[lh->num_file_names++];
7714 fe->dir_index = dir_index;
7715 fe->mod_time = mod_time;
7716 fe->length = length;
7722 /* Read the statement program header starting at OFFSET in
7723 .debug_line, according to the endianness of ABFD. Return a pointer
7724 to a struct line_header, allocated using xmalloc.
7726 NOTE: the strings in the include directory and file name tables of
7727 the returned object point into debug_line_buffer, and must not be
7729 static struct line_header *
7730 dwarf_decode_line_header (unsigned int offset, bfd *abfd,
7731 struct dwarf2_cu *cu)
7733 struct cleanup *back_to;
7734 struct line_header *lh;
7736 unsigned int bytes_read, offset_size;
7738 char *cur_dir, *cur_file;
7740 if (dwarf2_per_objfile->line.buffer == NULL)
7742 complaint (&symfile_complaints, _("missing .debug_line section"));
7746 /* Make sure that at least there's room for the total_length field.
7747 That could be 12 bytes long, but we're just going to fudge that. */
7748 if (offset + 4 >= dwarf2_per_objfile->line.size)
7750 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7754 lh = xmalloc (sizeof (*lh));
7755 memset (lh, 0, sizeof (*lh));
7756 back_to = make_cleanup ((make_cleanup_ftype *) free_line_header,
7759 line_ptr = dwarf2_per_objfile->line.buffer + offset;
7761 /* Read in the header. */
7763 read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header,
7764 &bytes_read, &offset_size);
7765 line_ptr += bytes_read;
7766 if (line_ptr + lh->total_length > (dwarf2_per_objfile->line.buffer
7767 + dwarf2_per_objfile->line.size))
7769 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7772 lh->statement_program_end = line_ptr + lh->total_length;
7773 lh->version = read_2_bytes (abfd, line_ptr);
7775 lh->header_length = read_offset_1 (abfd, line_ptr, offset_size);
7776 line_ptr += offset_size;
7777 lh->minimum_instruction_length = read_1_byte (abfd, line_ptr);
7779 lh->default_is_stmt = read_1_byte (abfd, line_ptr);
7781 lh->line_base = read_1_signed_byte (abfd, line_ptr);
7783 lh->line_range = read_1_byte (abfd, line_ptr);
7785 lh->opcode_base = read_1_byte (abfd, line_ptr);
7787 lh->standard_opcode_lengths
7788 = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0]));
7790 lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */
7791 for (i = 1; i < lh->opcode_base; ++i)
7793 lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr);
7797 /* Read directory table. */
7798 while ((cur_dir = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7800 line_ptr += bytes_read;
7801 add_include_dir (lh, cur_dir);
7803 line_ptr += bytes_read;
7805 /* Read file name table. */
7806 while ((cur_file = read_string (abfd, line_ptr, &bytes_read)) != NULL)
7808 unsigned int dir_index, mod_time, length;
7810 line_ptr += bytes_read;
7811 dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7812 line_ptr += bytes_read;
7813 mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7814 line_ptr += bytes_read;
7815 length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7816 line_ptr += bytes_read;
7818 add_file_name (lh, cur_file, dir_index, mod_time, length);
7820 line_ptr += bytes_read;
7821 lh->statement_program_start = line_ptr;
7823 if (line_ptr > (dwarf2_per_objfile->line.buffer
7824 + dwarf2_per_objfile->line.size))
7825 complaint (&symfile_complaints,
7826 _("line number info header doesn't fit in `.debug_line' section"));
7828 discard_cleanups (back_to);
7832 /* This function exists to work around a bug in certain compilers
7833 (particularly GCC 2.95), in which the first line number marker of a
7834 function does not show up until after the prologue, right before
7835 the second line number marker. This function shifts ADDRESS down
7836 to the beginning of the function if necessary, and is called on
7837 addresses passed to record_line. */
7840 check_cu_functions (CORE_ADDR address, struct dwarf2_cu *cu)
7842 struct function_range *fn;
7844 /* Find the function_range containing address. */
7849 cu->cached_fn = cu->first_fn;
7853 if (fn->lowpc <= address && fn->highpc > address)
7859 while (fn && fn != cu->cached_fn)
7860 if (fn->lowpc <= address && fn->highpc > address)
7870 if (address != fn->lowpc)
7871 complaint (&symfile_complaints,
7872 _("misplaced first line number at 0x%lx for '%s'"),
7873 (unsigned long) address, fn->name);
7878 /* Decode the Line Number Program (LNP) for the given line_header
7879 structure and CU. The actual information extracted and the type
7880 of structures created from the LNP depends on the value of PST.
7882 1. If PST is NULL, then this procedure uses the data from the program
7883 to create all necessary symbol tables, and their linetables.
7884 The compilation directory of the file is passed in COMP_DIR,
7885 and must not be NULL.
7887 2. If PST is not NULL, this procedure reads the program to determine
7888 the list of files included by the unit represented by PST, and
7889 builds all the associated partial symbol tables. In this case,
7890 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7891 is not used to compute the full name of the symtab, and therefore
7892 omitting it when building the partial symtab does not introduce
7893 the potential for inconsistency - a partial symtab and its associated
7894 symbtab having a different fullname -). */
7897 dwarf_decode_lines (struct line_header *lh, char *comp_dir, bfd *abfd,
7898 struct dwarf2_cu *cu, struct partial_symtab *pst)
7900 gdb_byte *line_ptr, *extended_end;
7902 unsigned int bytes_read, extended_len;
7903 unsigned char op_code, extended_op, adj_opcode;
7905 struct objfile *objfile = cu->objfile;
7906 struct gdbarch *gdbarch = get_objfile_arch (objfile);
7907 const int decode_for_pst_p = (pst != NULL);
7908 struct subfile *last_subfile = NULL, *first_subfile = current_subfile;
7910 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
7912 line_ptr = lh->statement_program_start;
7913 line_end = lh->statement_program_end;
7915 /* Read the statement sequences until there's nothing left. */
7916 while (line_ptr < line_end)
7918 /* state machine registers */
7919 CORE_ADDR address = 0;
7920 unsigned int file = 1;
7921 unsigned int line = 1;
7922 unsigned int column = 0;
7923 int is_stmt = lh->default_is_stmt;
7924 int basic_block = 0;
7925 int end_sequence = 0;
7928 if (!decode_for_pst_p && lh->num_file_names >= file)
7930 /* Start a subfile for the current file of the state machine. */
7931 /* lh->include_dirs and lh->file_names are 0-based, but the
7932 directory and file name numbers in the statement program
7934 struct file_entry *fe = &lh->file_names[file - 1];
7938 dir = lh->include_dirs[fe->dir_index - 1];
7940 dwarf2_start_subfile (fe->name, dir, comp_dir);
7943 /* Decode the table. */
7944 while (!end_sequence)
7946 op_code = read_1_byte (abfd, line_ptr);
7948 if (line_ptr > line_end)
7950 dwarf2_debug_line_missing_end_sequence_complaint ();
7954 if (op_code >= lh->opcode_base)
7956 /* Special operand. */
7957 adj_opcode = op_code - lh->opcode_base;
7958 address += (adj_opcode / lh->line_range)
7959 * lh->minimum_instruction_length;
7960 line += lh->line_base + (adj_opcode % lh->line_range);
7961 if (lh->num_file_names < file || file == 0)
7962 dwarf2_debug_line_missing_file_complaint ();
7965 lh->file_names[file - 1].included_p = 1;
7966 if (!decode_for_pst_p && is_stmt)
7968 if (last_subfile != current_subfile)
7970 addr = gdbarch_addr_bits_remove (gdbarch, address);
7972 record_line (last_subfile, 0, addr);
7973 last_subfile = current_subfile;
7975 /* Append row to matrix using current values. */
7976 addr = check_cu_functions (address, cu);
7977 addr = gdbarch_addr_bits_remove (gdbarch, addr);
7978 record_line (current_subfile, line, addr);
7983 else switch (op_code)
7985 case DW_LNS_extended_op:
7986 extended_len = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
7987 line_ptr += bytes_read;
7988 extended_end = line_ptr + extended_len;
7989 extended_op = read_1_byte (abfd, line_ptr);
7991 switch (extended_op)
7993 case DW_LNE_end_sequence:
7996 case DW_LNE_set_address:
7997 address = read_address (abfd, line_ptr, cu, &bytes_read);
7998 line_ptr += bytes_read;
7999 address += baseaddr;
8001 case DW_LNE_define_file:
8004 unsigned int dir_index, mod_time, length;
8006 cur_file = read_string (abfd, line_ptr, &bytes_read);
8007 line_ptr += bytes_read;
8009 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8010 line_ptr += bytes_read;
8012 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8013 line_ptr += bytes_read;
8015 read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8016 line_ptr += bytes_read;
8017 add_file_name (lh, cur_file, dir_index, mod_time, length);
8020 case DW_LNE_set_discriminator:
8021 /* The discriminator is not interesting to the debugger;
8023 line_ptr = extended_end;
8026 complaint (&symfile_complaints,
8027 _("mangled .debug_line section"));
8030 /* Make sure that we parsed the extended op correctly. If e.g.
8031 we expected a different address size than the producer used,
8032 we may have read the wrong number of bytes. */
8033 if (line_ptr != extended_end)
8035 complaint (&symfile_complaints,
8036 _("mangled .debug_line section"));
8041 if (lh->num_file_names < file || file == 0)
8042 dwarf2_debug_line_missing_file_complaint ();
8045 lh->file_names[file - 1].included_p = 1;
8046 if (!decode_for_pst_p && is_stmt)
8048 if (last_subfile != current_subfile)
8050 addr = gdbarch_addr_bits_remove (gdbarch, address);
8052 record_line (last_subfile, 0, addr);
8053 last_subfile = current_subfile;
8055 addr = check_cu_functions (address, cu);
8056 addr = gdbarch_addr_bits_remove (gdbarch, addr);
8057 record_line (current_subfile, line, addr);
8062 case DW_LNS_advance_pc:
8063 address += lh->minimum_instruction_length
8064 * read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8065 line_ptr += bytes_read;
8067 case DW_LNS_advance_line:
8068 line += read_signed_leb128 (abfd, line_ptr, &bytes_read);
8069 line_ptr += bytes_read;
8071 case DW_LNS_set_file:
8073 /* The arrays lh->include_dirs and lh->file_names are
8074 0-based, but the directory and file name numbers in
8075 the statement program are 1-based. */
8076 struct file_entry *fe;
8079 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8080 line_ptr += bytes_read;
8081 if (lh->num_file_names < file || file == 0)
8082 dwarf2_debug_line_missing_file_complaint ();
8085 fe = &lh->file_names[file - 1];
8087 dir = lh->include_dirs[fe->dir_index - 1];
8088 if (!decode_for_pst_p)
8090 last_subfile = current_subfile;
8091 dwarf2_start_subfile (fe->name, dir, comp_dir);
8096 case DW_LNS_set_column:
8097 column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8098 line_ptr += bytes_read;
8100 case DW_LNS_negate_stmt:
8101 is_stmt = (!is_stmt);
8103 case DW_LNS_set_basic_block:
8106 /* Add to the address register of the state machine the
8107 address increment value corresponding to special opcode
8108 255. I.e., this value is scaled by the minimum
8109 instruction length since special opcode 255 would have
8110 scaled the the increment. */
8111 case DW_LNS_const_add_pc:
8112 address += (lh->minimum_instruction_length
8113 * ((255 - lh->opcode_base) / lh->line_range));
8115 case DW_LNS_fixed_advance_pc:
8116 address += read_2_bytes (abfd, line_ptr);
8121 /* Unknown standard opcode, ignore it. */
8124 for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++)
8126 (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
8127 line_ptr += bytes_read;
8132 if (lh->num_file_names < file || file == 0)
8133 dwarf2_debug_line_missing_file_complaint ();
8136 lh->file_names[file - 1].included_p = 1;
8137 if (!decode_for_pst_p)
8139 addr = gdbarch_addr_bits_remove (gdbarch, address);
8140 record_line (current_subfile, 0, addr);
8145 if (decode_for_pst_p)
8149 /* Now that we're done scanning the Line Header Program, we can
8150 create the psymtab of each included file. */
8151 for (file_index = 0; file_index < lh->num_file_names; file_index++)
8152 if (lh->file_names[file_index].included_p == 1)
8154 const struct file_entry fe = lh->file_names [file_index];
8155 char *include_name = fe.name;
8156 char *dir_name = NULL;
8157 char *pst_filename = pst->filename;
8160 dir_name = lh->include_dirs[fe.dir_index - 1];
8162 if (!IS_ABSOLUTE_PATH (include_name) && dir_name != NULL)
8164 include_name = concat (dir_name, SLASH_STRING,
8165 include_name, (char *)NULL);
8166 make_cleanup (xfree, include_name);
8169 if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL)
8171 pst_filename = concat (pst->dirname, SLASH_STRING,
8172 pst_filename, (char *)NULL);
8173 make_cleanup (xfree, pst_filename);
8176 if (strcmp (include_name, pst_filename) != 0)
8177 dwarf2_create_include_psymtab (include_name, pst, objfile);
8182 /* Make sure a symtab is created for every file, even files
8183 which contain only variables (i.e. no code with associated
8187 struct file_entry *fe;
8189 for (i = 0; i < lh->num_file_names; i++)
8192 fe = &lh->file_names[i];
8194 dir = lh->include_dirs[fe->dir_index - 1];
8195 dwarf2_start_subfile (fe->name, dir, comp_dir);
8197 /* Skip the main file; we don't need it, and it must be
8198 allocated last, so that it will show up before the
8199 non-primary symtabs in the objfile's symtab list. */
8200 if (current_subfile == first_subfile)
8203 if (current_subfile->symtab == NULL)
8204 current_subfile->symtab = allocate_symtab (current_subfile->name,
8206 fe->symtab = current_subfile->symtab;
8211 /* Start a subfile for DWARF. FILENAME is the name of the file and
8212 DIRNAME the name of the source directory which contains FILENAME
8213 or NULL if not known. COMP_DIR is the compilation directory for the
8214 linetable's compilation unit or NULL if not known.
8215 This routine tries to keep line numbers from identical absolute and
8216 relative file names in a common subfile.
8218 Using the `list' example from the GDB testsuite, which resides in
8219 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8220 of /srcdir/list0.c yields the following debugging information for list0.c:
8222 DW_AT_name: /srcdir/list0.c
8223 DW_AT_comp_dir: /compdir
8224 files.files[0].name: list0.h
8225 files.files[0].dir: /srcdir
8226 files.files[1].name: list0.c
8227 files.files[1].dir: /srcdir
8229 The line number information for list0.c has to end up in a single
8230 subfile, so that `break /srcdir/list0.c:1' works as expected.
8231 start_subfile will ensure that this happens provided that we pass the
8232 concatenation of files.files[1].dir and files.files[1].name as the
8236 dwarf2_start_subfile (char *filename, char *dirname, char *comp_dir)
8240 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8241 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8242 second argument to start_subfile. To be consistent, we do the
8243 same here. In order not to lose the line information directory,
8244 we concatenate it to the filename when it makes sense.
8245 Note that the Dwarf3 standard says (speaking of filenames in line
8246 information): ``The directory index is ignored for file names
8247 that represent full path names''. Thus ignoring dirname in the
8248 `else' branch below isn't an issue. */
8250 if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL)
8251 fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL);
8253 fullname = filename;
8255 start_subfile (fullname, comp_dir);
8257 if (fullname != filename)
8262 var_decode_location (struct attribute *attr, struct symbol *sym,
8263 struct dwarf2_cu *cu)
8265 struct objfile *objfile = cu->objfile;
8266 struct comp_unit_head *cu_header = &cu->header;
8268 /* NOTE drow/2003-01-30: There used to be a comment and some special
8269 code here to turn a symbol with DW_AT_external and a
8270 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8271 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8272 with some versions of binutils) where shared libraries could have
8273 relocations against symbols in their debug information - the
8274 minimal symbol would have the right address, but the debug info
8275 would not. It's no longer necessary, because we will explicitly
8276 apply relocations when we read in the debug information now. */
8278 /* A DW_AT_location attribute with no contents indicates that a
8279 variable has been optimized away. */
8280 if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)
8282 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8286 /* Handle one degenerate form of location expression specially, to
8287 preserve GDB's previous behavior when section offsets are
8288 specified. If this is just a DW_OP_addr then mark this symbol
8291 if (attr_form_is_block (attr)
8292 && DW_BLOCK (attr)->size == 1 + cu_header->addr_size
8293 && DW_BLOCK (attr)->data[0] == DW_OP_addr)
8297 SYMBOL_VALUE_ADDRESS (sym) =
8298 read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy);
8299 SYMBOL_CLASS (sym) = LOC_STATIC;
8300 fixup_symbol_section (sym, objfile);
8301 SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets,
8302 SYMBOL_SECTION (sym));
8306 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8307 expression evaluator, and use LOC_COMPUTED only when necessary
8308 (i.e. when the value of a register or memory location is
8309 referenced, or a thread-local block, etc.). Then again, it might
8310 not be worthwhile. I'm assuming that it isn't unless performance
8311 or memory numbers show me otherwise. */
8313 dwarf2_symbol_mark_computed (attr, sym, cu);
8314 SYMBOL_CLASS (sym) = LOC_COMPUTED;
8317 /* Given a pointer to a DWARF information entry, figure out if we need
8318 to make a symbol table entry for it, and if so, create a new entry
8319 and return a pointer to it.
8320 If TYPE is NULL, determine symbol type from the die, otherwise
8321 used the passed type. */
8323 static struct symbol *
8324 new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
8326 struct objfile *objfile = cu->objfile;
8327 struct symbol *sym = NULL;
8329 struct attribute *attr = NULL;
8330 struct attribute *attr2 = NULL;
8332 int inlined_func = (die->tag == DW_TAG_inlined_subroutine);
8334 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
8336 if (die->tag != DW_TAG_namespace)
8337 name = dwarf2_linkage_name (die, cu);
8339 name = TYPE_NAME (type);
8343 sym = (struct symbol *) obstack_alloc (&objfile->objfile_obstack,
8344 sizeof (struct symbol));
8345 OBJSTAT (objfile, n_syms++);
8346 memset (sym, 0, sizeof (struct symbol));
8348 /* Cache this symbol's name and the name's demangled form (if any). */
8349 SYMBOL_LANGUAGE (sym) = cu->language;
8350 SYMBOL_SET_NAMES (sym, name, strlen (name), 0, objfile);
8352 /* Default assumptions.
8353 Use the passed type or decode it from the die. */
8354 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8355 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
8357 SYMBOL_TYPE (sym) = type;
8359 SYMBOL_TYPE (sym) = die_type (die, cu);
8360 attr = dwarf2_attr (die,
8361 inlined_func ? DW_AT_call_line : DW_AT_decl_line,
8365 SYMBOL_LINE (sym) = DW_UNSND (attr);
8368 attr = dwarf2_attr (die,
8369 inlined_func ? DW_AT_call_file : DW_AT_decl_file,
8373 int file_index = DW_UNSND (attr);
8374 if (cu->line_header == NULL
8375 || file_index > cu->line_header->num_file_names)
8376 complaint (&symfile_complaints,
8377 _("file index out of range"));
8378 else if (file_index > 0)
8380 struct file_entry *fe;
8381 fe = &cu->line_header->file_names[file_index - 1];
8382 SYMBOL_SYMTAB (sym) = fe->symtab;
8389 attr = dwarf2_attr (die, DW_AT_low_pc, cu);
8392 SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr;
8394 SYMBOL_CLASS (sym) = LOC_LABEL;
8396 case DW_TAG_subprogram:
8397 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8399 SYMBOL_CLASS (sym) = LOC_BLOCK;
8400 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8401 if ((attr2 && (DW_UNSND (attr2) != 0))
8402 || cu->language == language_ada)
8404 /* Subprograms marked external are stored as a global symbol.
8405 Ada subprograms, whether marked external or not, are always
8406 stored as a global symbol, because we want to be able to
8407 access them globally. For instance, we want to be able
8408 to break on a nested subprogram without having to
8409 specify the context. */
8410 add_symbol_to_list (sym, &global_symbols);
8414 add_symbol_to_list (sym, cu->list_in_scope);
8417 case DW_TAG_inlined_subroutine:
8418 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8420 SYMBOL_CLASS (sym) = LOC_BLOCK;
8421 SYMBOL_INLINED (sym) = 1;
8422 /* Do not add the symbol to any lists. It will be found via
8423 BLOCK_FUNCTION from the blockvector. */
8425 case DW_TAG_variable:
8426 /* Compilation with minimal debug info may result in variables
8427 with missing type entries. Change the misleading `void' type
8428 to something sensible. */
8429 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID)
8431 = objfile_type (objfile)->nodebug_data_symbol;
8433 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8436 dwarf2_const_value (attr, sym, cu);
8437 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8438 if (attr2 && (DW_UNSND (attr2) != 0))
8439 add_symbol_to_list (sym, &global_symbols);
8441 add_symbol_to_list (sym, cu->list_in_scope);
8444 attr = dwarf2_attr (die, DW_AT_location, cu);
8447 var_decode_location (attr, sym, cu);
8448 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8449 if (attr2 && (DW_UNSND (attr2) != 0))
8450 add_symbol_to_list (sym, &global_symbols);
8452 add_symbol_to_list (sym, cu->list_in_scope);
8456 /* We do not know the address of this symbol.
8457 If it is an external symbol and we have type information
8458 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8459 The address of the variable will then be determined from
8460 the minimal symbol table whenever the variable is
8462 attr2 = dwarf2_attr (die, DW_AT_external, cu);
8463 if (attr2 && (DW_UNSND (attr2) != 0)
8464 && dwarf2_attr (die, DW_AT_type, cu) != NULL)
8466 struct pending **list_to_add;
8468 /* A variable with DW_AT_external is never static, but it
8469 may be block-scoped. */
8470 list_to_add = (cu->list_in_scope == &file_symbols
8471 ? &global_symbols : cu->list_in_scope);
8473 SYMBOL_CLASS (sym) = LOC_UNRESOLVED;
8474 add_symbol_to_list (sym, list_to_add);
8476 else if (!die_is_declaration (die, cu))
8478 /* Use the default LOC_OPTIMIZED_OUT class. */
8479 gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT);
8480 add_symbol_to_list (sym, cu->list_in_scope);
8484 case DW_TAG_formal_parameter:
8485 /* If we are inside a function, mark this as an argument. If
8486 not, we might be looking at an argument to an inlined function
8487 when we do not have enough information to show inlined frames;
8488 pretend it's a local variable in that case so that the user can
8490 if (context_stack_depth > 0
8491 && context_stack[context_stack_depth - 1].name != NULL)
8492 SYMBOL_IS_ARGUMENT (sym) = 1;
8493 attr = dwarf2_attr (die, DW_AT_location, cu);
8496 var_decode_location (attr, sym, cu);
8498 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8501 dwarf2_const_value (attr, sym, cu);
8503 add_symbol_to_list (sym, cu->list_in_scope);
8505 case DW_TAG_unspecified_parameters:
8506 /* From varargs functions; gdb doesn't seem to have any
8507 interest in this information, so just ignore it for now.
8510 case DW_TAG_class_type:
8511 case DW_TAG_interface_type:
8512 case DW_TAG_structure_type:
8513 case DW_TAG_union_type:
8514 case DW_TAG_set_type:
8515 case DW_TAG_enumeration_type:
8516 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8517 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
8519 /* Make sure that the symbol includes appropriate enclosing
8520 classes/namespaces in its name. These are calculated in
8521 read_structure_type, and the correct name is saved in
8524 if (cu->language == language_cplus
8525 || cu->language == language_java)
8527 struct type *type = SYMBOL_TYPE (sym);
8529 if (TYPE_TAG_NAME (type) != NULL)
8531 /* FIXME: carlton/2003-11-10: Should this use
8532 SYMBOL_SET_NAMES instead? (The same problem also
8533 arises further down in this function.) */
8534 /* The type's name is already allocated along with
8535 this objfile, so we don't need to duplicate it
8537 SYMBOL_LINKAGE_NAME (sym) = TYPE_TAG_NAME (type);
8542 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8543 really ever be static objects: otherwise, if you try
8544 to, say, break of a class's method and you're in a file
8545 which doesn't mention that class, it won't work unless
8546 the check for all static symbols in lookup_symbol_aux
8547 saves you. See the OtherFileClass tests in
8548 gdb.c++/namespace.exp. */
8550 struct pending **list_to_add;
8552 list_to_add = (cu->list_in_scope == &file_symbols
8553 && (cu->language == language_cplus
8554 || cu->language == language_java)
8555 ? &global_symbols : cu->list_in_scope);
8557 add_symbol_to_list (sym, list_to_add);
8559 /* The semantics of C++ state that "struct foo { ... }" also
8560 defines a typedef for "foo". A Java class declaration also
8561 defines a typedef for the class. */
8562 if (cu->language == language_cplus
8563 || cu->language == language_java
8564 || cu->language == language_ada)
8566 /* The symbol's name is already allocated along with
8567 this objfile, so we don't need to duplicate it for
8569 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
8570 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym);
8574 case DW_TAG_typedef:
8575 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8576 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8577 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8578 add_symbol_to_list (sym, cu->list_in_scope);
8580 case DW_TAG_base_type:
8581 case DW_TAG_subrange_type:
8582 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8583 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
8584 add_symbol_to_list (sym, cu->list_in_scope);
8586 case DW_TAG_enumerator:
8587 SYMBOL_LINKAGE_NAME (sym) = (char *) dwarf2_full_name (die, cu);
8588 attr = dwarf2_attr (die, DW_AT_const_value, cu);
8591 dwarf2_const_value (attr, sym, cu);
8594 /* NOTE: carlton/2003-11-10: See comment above in the
8595 DW_TAG_class_type, etc. block. */
8597 struct pending **list_to_add;
8599 list_to_add = (cu->list_in_scope == &file_symbols
8600 && (cu->language == language_cplus
8601 || cu->language == language_java)
8602 ? &global_symbols : cu->list_in_scope);
8604 add_symbol_to_list (sym, list_to_add);
8607 case DW_TAG_namespace:
8608 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
8609 add_symbol_to_list (sym, &global_symbols);
8612 /* Not a tag we recognize. Hopefully we aren't processing
8613 trash data, but since we must specifically ignore things
8614 we don't recognize, there is nothing else we should do at
8616 complaint (&symfile_complaints, _("unsupported tag: '%s'"),
8617 dwarf_tag_name (die->tag));
8621 /* For the benefit of old versions of GCC, check for anonymous
8622 namespaces based on the demangled name. */
8623 if (!processing_has_namespace_info
8624 && cu->language == language_cplus
8625 && dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu) != NULL)
8626 cp_scan_for_anonymous_namespaces (sym);
8631 /* Copy constant value from an attribute to a symbol. */
8634 dwarf2_const_value (struct attribute *attr, struct symbol *sym,
8635 struct dwarf2_cu *cu)
8637 struct objfile *objfile = cu->objfile;
8638 struct comp_unit_head *cu_header = &cu->header;
8639 enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ?
8640 BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
8641 struct dwarf_block *blk;
8646 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != cu_header->addr_size)
8647 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8648 cu_header->addr_size,
8649 TYPE_LENGTH (SYMBOL_TYPE
8651 SYMBOL_VALUE_BYTES (sym) =
8652 obstack_alloc (&objfile->objfile_obstack, cu_header->addr_size);
8653 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8654 it's body - store_unsigned_integer. */
8655 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym), cu_header->addr_size,
8656 byte_order, DW_ADDR (attr));
8657 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8659 case DW_FORM_string:
8661 /* DW_STRING is already allocated on the obstack, point directly
8663 SYMBOL_VALUE_BYTES (sym) = (gdb_byte *) DW_STRING (attr);
8664 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8666 case DW_FORM_block1:
8667 case DW_FORM_block2:
8668 case DW_FORM_block4:
8670 blk = DW_BLOCK (attr);
8671 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) != blk->size)
8672 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym),
8674 TYPE_LENGTH (SYMBOL_TYPE
8676 SYMBOL_VALUE_BYTES (sym) =
8677 obstack_alloc (&objfile->objfile_obstack, blk->size);
8678 memcpy (SYMBOL_VALUE_BYTES (sym), blk->data, blk->size);
8679 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
8682 /* The DW_AT_const_value attributes are supposed to carry the
8683 symbol's value "represented as it would be on the target
8684 architecture." By the time we get here, it's already been
8685 converted to host endianness, so we just need to sign- or
8686 zero-extend it as appropriate. */
8688 dwarf2_const_value_data (attr, sym, 8);
8691 dwarf2_const_value_data (attr, sym, 16);
8694 dwarf2_const_value_data (attr, sym, 32);
8697 dwarf2_const_value_data (attr, sym, 64);
8701 SYMBOL_VALUE (sym) = DW_SND (attr);
8702 SYMBOL_CLASS (sym) = LOC_CONST;
8706 SYMBOL_VALUE (sym) = DW_UNSND (attr);
8707 SYMBOL_CLASS (sym) = LOC_CONST;
8711 complaint (&symfile_complaints,
8712 _("unsupported const value attribute form: '%s'"),
8713 dwarf_form_name (attr->form));
8714 SYMBOL_VALUE (sym) = 0;
8715 SYMBOL_CLASS (sym) = LOC_CONST;
8721 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8722 or zero-extend it as appropriate for the symbol's type. */
8724 dwarf2_const_value_data (struct attribute *attr,
8728 LONGEST l = DW_UNSND (attr);
8730 if (bits < sizeof (l) * 8)
8732 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym)))
8733 l &= ((LONGEST) 1 << bits) - 1;
8735 l = (l << (sizeof (l) * 8 - bits)) >> (sizeof (l) * 8 - bits);
8738 SYMBOL_VALUE (sym) = l;
8739 SYMBOL_CLASS (sym) = LOC_CONST;
8743 /* Return the type of the die in question using its DW_AT_type attribute. */
8745 static struct type *
8746 die_type (struct die_info *die, struct dwarf2_cu *cu)
8749 struct attribute *type_attr;
8750 struct die_info *type_die;
8752 type_attr = dwarf2_attr (die, DW_AT_type, cu);
8755 /* A missing DW_AT_type represents a void type. */
8756 return objfile_type (cu->objfile)->builtin_void;
8759 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8761 type = tag_type_to_type (type_die, cu);
8764 dump_die_for_error (type_die);
8765 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8771 /* Return the containing type of the die in question using its
8772 DW_AT_containing_type attribute. */
8774 static struct type *
8775 die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
8777 struct type *type = NULL;
8778 struct attribute *type_attr;
8779 struct die_info *type_die = NULL;
8781 type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
8784 type_die = follow_die_ref_or_sig (die, type_attr, &cu);
8785 type = tag_type_to_type (type_die, cu);
8790 dump_die_for_error (type_die);
8791 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8797 static struct type *
8798 tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
8800 struct type *this_type;
8802 this_type = read_type_die (die, cu);
8805 dump_die_for_error (die);
8806 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8812 static struct type *
8813 read_type_die (struct die_info *die, struct dwarf2_cu *cu)
8815 struct type *this_type;
8817 this_type = get_die_type (die, cu);
8823 case DW_TAG_class_type:
8824 case DW_TAG_interface_type:
8825 case DW_TAG_structure_type:
8826 case DW_TAG_union_type:
8827 this_type = read_structure_type (die, cu);
8829 case DW_TAG_enumeration_type:
8830 this_type = read_enumeration_type (die, cu);
8832 case DW_TAG_subprogram:
8833 case DW_TAG_subroutine_type:
8834 case DW_TAG_inlined_subroutine:
8835 this_type = read_subroutine_type (die, cu);
8837 case DW_TAG_array_type:
8838 this_type = read_array_type (die, cu);
8840 case DW_TAG_set_type:
8841 this_type = read_set_type (die, cu);
8843 case DW_TAG_pointer_type:
8844 this_type = read_tag_pointer_type (die, cu);
8846 case DW_TAG_ptr_to_member_type:
8847 this_type = read_tag_ptr_to_member_type (die, cu);
8849 case DW_TAG_reference_type:
8850 this_type = read_tag_reference_type (die, cu);
8852 case DW_TAG_const_type:
8853 this_type = read_tag_const_type (die, cu);
8855 case DW_TAG_volatile_type:
8856 this_type = read_tag_volatile_type (die, cu);
8858 case DW_TAG_string_type:
8859 this_type = read_tag_string_type (die, cu);
8861 case DW_TAG_typedef:
8862 this_type = read_typedef (die, cu);
8864 case DW_TAG_subrange_type:
8865 this_type = read_subrange_type (die, cu);
8867 case DW_TAG_base_type:
8868 this_type = read_base_type (die, cu);
8870 case DW_TAG_unspecified_type:
8871 this_type = read_unspecified_type (die, cu);
8873 case DW_TAG_namespace:
8874 this_type = read_namespace_type (die, cu);
8877 complaint (&symfile_complaints, _("unexpected tag in read_type_die: '%s'"),
8878 dwarf_tag_name (die->tag));
8885 /* Return the name of the namespace/class that DIE is defined within,
8886 or "" if we can't tell. The caller should not xfree the result.
8888 For example, if we're within the method foo() in the following
8898 then determine_prefix on foo's die will return "N::C". */
8901 determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
8903 struct die_info *parent, *spec_die;
8904 struct dwarf2_cu *spec_cu;
8905 struct type *parent_type;
8907 if (cu->language != language_cplus
8908 && cu->language != language_java)
8911 /* We have to be careful in the presence of DW_AT_specification.
8912 For example, with GCC 3.4, given the code
8916 // Definition of N::foo.
8920 then we'll have a tree of DIEs like this:
8922 1: DW_TAG_compile_unit
8923 2: DW_TAG_namespace // N
8924 3: DW_TAG_subprogram // declaration of N::foo
8925 4: DW_TAG_subprogram // definition of N::foo
8926 DW_AT_specification // refers to die #3
8928 Thus, when processing die #4, we have to pretend that we're in
8929 the context of its DW_AT_specification, namely the contex of die
8932 spec_die = die_specification (die, &spec_cu);
8933 if (spec_die == NULL)
8934 parent = die->parent;
8937 parent = spec_die->parent;
8944 switch (parent->tag)
8946 case DW_TAG_namespace:
8947 parent_type = read_type_die (parent, cu);
8948 /* We give a name to even anonymous namespaces. */
8949 return TYPE_TAG_NAME (parent_type);
8950 case DW_TAG_class_type:
8951 case DW_TAG_interface_type:
8952 case DW_TAG_structure_type:
8953 case DW_TAG_union_type:
8954 parent_type = read_type_die (parent, cu);
8955 if (TYPE_TAG_NAME (parent_type) != NULL)
8956 return TYPE_TAG_NAME (parent_type);
8958 /* An anonymous structure is only allowed non-static data
8959 members; no typedefs, no member functions, et cetera.
8960 So it does not need a prefix. */
8963 return determine_prefix (parent, cu);
8967 /* Return a newly-allocated string formed by concatenating PREFIX and
8968 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8969 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8970 perform an obconcat, otherwise allocate storage for the result. The CU argument
8971 is used to determine the language and hence, the appropriate separator. */
8973 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8976 typename_concat (struct obstack *obs, const char *prefix, const char *suffix,
8977 struct dwarf2_cu *cu)
8981 if (suffix == NULL || suffix[0] == '\0' || prefix == NULL || prefix[0] == '\0')
8983 else if (cu->language == language_java)
8995 char *retval = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1);
8996 strcpy (retval, prefix);
8997 strcat (retval, sep);
8998 strcat (retval, suffix);
9003 /* We have an obstack. */
9004 return obconcat (obs, prefix, sep, suffix);
9008 /* Return sibling of die, NULL if no sibling. */
9010 static struct die_info *
9011 sibling_die (struct die_info *die)
9013 return die->sibling;
9016 /* Get linkage name of a die, return NULL if not found. */
9019 dwarf2_linkage_name (struct die_info *die, struct dwarf2_cu *cu)
9021 struct attribute *attr;
9023 attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu);
9024 if (attr && DW_STRING (attr))
9025 return DW_STRING (attr);
9026 return dwarf2_name (die, cu);
9029 /* Get name of a die, return NULL if not found. */
9032 dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu,
9033 struct obstack *obstack)
9035 if (name && cu->language == language_cplus)
9037 char *canon_name = cp_canonicalize_string (name);
9039 if (canon_name != NULL)
9041 if (strcmp (canon_name, name) != 0)
9042 name = obsavestring (canon_name, strlen (canon_name),
9051 /* Get name of a die, return NULL if not found. */
9054 dwarf2_name (struct die_info *die, struct dwarf2_cu *cu)
9056 struct attribute *attr;
9058 attr = dwarf2_attr (die, DW_AT_name, cu);
9059 if (!attr || !DW_STRING (attr))
9064 case DW_TAG_compile_unit:
9065 /* Compilation units have a DW_AT_name that is a filename, not
9066 a source language identifier. */
9067 case DW_TAG_enumeration_type:
9068 case DW_TAG_enumerator:
9069 /* These tags always have simple identifiers already; no need
9070 to canonicalize them. */
9071 return DW_STRING (attr);
9073 if (!DW_STRING_IS_CANONICAL (attr))
9076 = dwarf2_canonicalize_name (DW_STRING (attr), cu,
9077 &cu->objfile->objfile_obstack);
9078 DW_STRING_IS_CANONICAL (attr) = 1;
9080 return DW_STRING (attr);
9084 /* Return the die that this die in an extension of, or NULL if there
9085 is none. *EXT_CU is the CU containing DIE on input, and the CU
9086 containing the return value on output. */
9088 static struct die_info *
9089 dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu)
9091 struct attribute *attr;
9093 attr = dwarf2_attr (die, DW_AT_extension, *ext_cu);
9097 return follow_die_ref (die, attr, ext_cu);
9100 /* Convert a DIE tag into its string name. */
9103 dwarf_tag_name (unsigned tag)
9107 case DW_TAG_padding:
9108 return "DW_TAG_padding";
9109 case DW_TAG_array_type:
9110 return "DW_TAG_array_type";
9111 case DW_TAG_class_type:
9112 return "DW_TAG_class_type";
9113 case DW_TAG_entry_point:
9114 return "DW_TAG_entry_point";
9115 case DW_TAG_enumeration_type:
9116 return "DW_TAG_enumeration_type";
9117 case DW_TAG_formal_parameter:
9118 return "DW_TAG_formal_parameter";
9119 case DW_TAG_imported_declaration:
9120 return "DW_TAG_imported_declaration";
9122 return "DW_TAG_label";
9123 case DW_TAG_lexical_block:
9124 return "DW_TAG_lexical_block";
9126 return "DW_TAG_member";
9127 case DW_TAG_pointer_type:
9128 return "DW_TAG_pointer_type";
9129 case DW_TAG_reference_type:
9130 return "DW_TAG_reference_type";
9131 case DW_TAG_compile_unit:
9132 return "DW_TAG_compile_unit";
9133 case DW_TAG_string_type:
9134 return "DW_TAG_string_type";
9135 case DW_TAG_structure_type:
9136 return "DW_TAG_structure_type";
9137 case DW_TAG_subroutine_type:
9138 return "DW_TAG_subroutine_type";
9139 case DW_TAG_typedef:
9140 return "DW_TAG_typedef";
9141 case DW_TAG_union_type:
9142 return "DW_TAG_union_type";
9143 case DW_TAG_unspecified_parameters:
9144 return "DW_TAG_unspecified_parameters";
9145 case DW_TAG_variant:
9146 return "DW_TAG_variant";
9147 case DW_TAG_common_block:
9148 return "DW_TAG_common_block";
9149 case DW_TAG_common_inclusion:
9150 return "DW_TAG_common_inclusion";
9151 case DW_TAG_inheritance:
9152 return "DW_TAG_inheritance";
9153 case DW_TAG_inlined_subroutine:
9154 return "DW_TAG_inlined_subroutine";
9156 return "DW_TAG_module";
9157 case DW_TAG_ptr_to_member_type:
9158 return "DW_TAG_ptr_to_member_type";
9159 case DW_TAG_set_type:
9160 return "DW_TAG_set_type";
9161 case DW_TAG_subrange_type:
9162 return "DW_TAG_subrange_type";
9163 case DW_TAG_with_stmt:
9164 return "DW_TAG_with_stmt";
9165 case DW_TAG_access_declaration:
9166 return "DW_TAG_access_declaration";
9167 case DW_TAG_base_type:
9168 return "DW_TAG_base_type";
9169 case DW_TAG_catch_block:
9170 return "DW_TAG_catch_block";
9171 case DW_TAG_const_type:
9172 return "DW_TAG_const_type";
9173 case DW_TAG_constant:
9174 return "DW_TAG_constant";
9175 case DW_TAG_enumerator:
9176 return "DW_TAG_enumerator";
9177 case DW_TAG_file_type:
9178 return "DW_TAG_file_type";
9180 return "DW_TAG_friend";
9181 case DW_TAG_namelist:
9182 return "DW_TAG_namelist";
9183 case DW_TAG_namelist_item:
9184 return "DW_TAG_namelist_item";
9185 case DW_TAG_packed_type:
9186 return "DW_TAG_packed_type";
9187 case DW_TAG_subprogram:
9188 return "DW_TAG_subprogram";
9189 case DW_TAG_template_type_param:
9190 return "DW_TAG_template_type_param";
9191 case DW_TAG_template_value_param:
9192 return "DW_TAG_template_value_param";
9193 case DW_TAG_thrown_type:
9194 return "DW_TAG_thrown_type";
9195 case DW_TAG_try_block:
9196 return "DW_TAG_try_block";
9197 case DW_TAG_variant_part:
9198 return "DW_TAG_variant_part";
9199 case DW_TAG_variable:
9200 return "DW_TAG_variable";
9201 case DW_TAG_volatile_type:
9202 return "DW_TAG_volatile_type";
9203 case DW_TAG_dwarf_procedure:
9204 return "DW_TAG_dwarf_procedure";
9205 case DW_TAG_restrict_type:
9206 return "DW_TAG_restrict_type";
9207 case DW_TAG_interface_type:
9208 return "DW_TAG_interface_type";
9209 case DW_TAG_namespace:
9210 return "DW_TAG_namespace";
9211 case DW_TAG_imported_module:
9212 return "DW_TAG_imported_module";
9213 case DW_TAG_unspecified_type:
9214 return "DW_TAG_unspecified_type";
9215 case DW_TAG_partial_unit:
9216 return "DW_TAG_partial_unit";
9217 case DW_TAG_imported_unit:
9218 return "DW_TAG_imported_unit";
9219 case DW_TAG_condition:
9220 return "DW_TAG_condition";
9221 case DW_TAG_shared_type:
9222 return "DW_TAG_shared_type";
9223 case DW_TAG_type_unit:
9224 return "DW_TAG_type_unit";
9225 case DW_TAG_MIPS_loop:
9226 return "DW_TAG_MIPS_loop";
9227 case DW_TAG_HP_array_descriptor:
9228 return "DW_TAG_HP_array_descriptor";
9229 case DW_TAG_format_label:
9230 return "DW_TAG_format_label";
9231 case DW_TAG_function_template:
9232 return "DW_TAG_function_template";
9233 case DW_TAG_class_template:
9234 return "DW_TAG_class_template";
9235 case DW_TAG_GNU_BINCL:
9236 return "DW_TAG_GNU_BINCL";
9237 case DW_TAG_GNU_EINCL:
9238 return "DW_TAG_GNU_EINCL";
9239 case DW_TAG_upc_shared_type:
9240 return "DW_TAG_upc_shared_type";
9241 case DW_TAG_upc_strict_type:
9242 return "DW_TAG_upc_strict_type";
9243 case DW_TAG_upc_relaxed_type:
9244 return "DW_TAG_upc_relaxed_type";
9245 case DW_TAG_PGI_kanji_type:
9246 return "DW_TAG_PGI_kanji_type";
9247 case DW_TAG_PGI_interface_block:
9248 return "DW_TAG_PGI_interface_block";
9250 return "DW_TAG_<unknown>";
9254 /* Convert a DWARF attribute code into its string name. */
9257 dwarf_attr_name (unsigned attr)
9262 return "DW_AT_sibling";
9263 case DW_AT_location:
9264 return "DW_AT_location";
9266 return "DW_AT_name";
9267 case DW_AT_ordering:
9268 return "DW_AT_ordering";
9269 case DW_AT_subscr_data:
9270 return "DW_AT_subscr_data";
9271 case DW_AT_byte_size:
9272 return "DW_AT_byte_size";
9273 case DW_AT_bit_offset:
9274 return "DW_AT_bit_offset";
9275 case DW_AT_bit_size:
9276 return "DW_AT_bit_size";
9277 case DW_AT_element_list:
9278 return "DW_AT_element_list";
9279 case DW_AT_stmt_list:
9280 return "DW_AT_stmt_list";
9282 return "DW_AT_low_pc";
9284 return "DW_AT_high_pc";
9285 case DW_AT_language:
9286 return "DW_AT_language";
9288 return "DW_AT_member";
9290 return "DW_AT_discr";
9291 case DW_AT_discr_value:
9292 return "DW_AT_discr_value";
9293 case DW_AT_visibility:
9294 return "DW_AT_visibility";
9296 return "DW_AT_import";
9297 case DW_AT_string_length:
9298 return "DW_AT_string_length";
9299 case DW_AT_common_reference:
9300 return "DW_AT_common_reference";
9301 case DW_AT_comp_dir:
9302 return "DW_AT_comp_dir";
9303 case DW_AT_const_value:
9304 return "DW_AT_const_value";
9305 case DW_AT_containing_type:
9306 return "DW_AT_containing_type";
9307 case DW_AT_default_value:
9308 return "DW_AT_default_value";
9310 return "DW_AT_inline";
9311 case DW_AT_is_optional:
9312 return "DW_AT_is_optional";
9313 case DW_AT_lower_bound:
9314 return "DW_AT_lower_bound";
9315 case DW_AT_producer:
9316 return "DW_AT_producer";
9317 case DW_AT_prototyped:
9318 return "DW_AT_prototyped";
9319 case DW_AT_return_addr:
9320 return "DW_AT_return_addr";
9321 case DW_AT_start_scope:
9322 return "DW_AT_start_scope";
9323 case DW_AT_bit_stride:
9324 return "DW_AT_bit_stride";
9325 case DW_AT_upper_bound:
9326 return "DW_AT_upper_bound";
9327 case DW_AT_abstract_origin:
9328 return "DW_AT_abstract_origin";
9329 case DW_AT_accessibility:
9330 return "DW_AT_accessibility";
9331 case DW_AT_address_class:
9332 return "DW_AT_address_class";
9333 case DW_AT_artificial:
9334 return "DW_AT_artificial";
9335 case DW_AT_base_types:
9336 return "DW_AT_base_types";
9337 case DW_AT_calling_convention:
9338 return "DW_AT_calling_convention";
9340 return "DW_AT_count";
9341 case DW_AT_data_member_location:
9342 return "DW_AT_data_member_location";
9343 case DW_AT_decl_column:
9344 return "DW_AT_decl_column";
9345 case DW_AT_decl_file:
9346 return "DW_AT_decl_file";
9347 case DW_AT_decl_line:
9348 return "DW_AT_decl_line";
9349 case DW_AT_declaration:
9350 return "DW_AT_declaration";
9351 case DW_AT_discr_list:
9352 return "DW_AT_discr_list";
9353 case DW_AT_encoding:
9354 return "DW_AT_encoding";
9355 case DW_AT_external:
9356 return "DW_AT_external";
9357 case DW_AT_frame_base:
9358 return "DW_AT_frame_base";
9360 return "DW_AT_friend";
9361 case DW_AT_identifier_case:
9362 return "DW_AT_identifier_case";
9363 case DW_AT_macro_info:
9364 return "DW_AT_macro_info";
9365 case DW_AT_namelist_items:
9366 return "DW_AT_namelist_items";
9367 case DW_AT_priority:
9368 return "DW_AT_priority";
9370 return "DW_AT_segment";
9371 case DW_AT_specification:
9372 return "DW_AT_specification";
9373 case DW_AT_static_link:
9374 return "DW_AT_static_link";
9376 return "DW_AT_type";
9377 case DW_AT_use_location:
9378 return "DW_AT_use_location";
9379 case DW_AT_variable_parameter:
9380 return "DW_AT_variable_parameter";
9381 case DW_AT_virtuality:
9382 return "DW_AT_virtuality";
9383 case DW_AT_vtable_elem_location:
9384 return "DW_AT_vtable_elem_location";
9385 /* DWARF 3 values. */
9386 case DW_AT_allocated:
9387 return "DW_AT_allocated";
9388 case DW_AT_associated:
9389 return "DW_AT_associated";
9390 case DW_AT_data_location:
9391 return "DW_AT_data_location";
9392 case DW_AT_byte_stride:
9393 return "DW_AT_byte_stride";
9394 case DW_AT_entry_pc:
9395 return "DW_AT_entry_pc";
9396 case DW_AT_use_UTF8:
9397 return "DW_AT_use_UTF8";
9398 case DW_AT_extension:
9399 return "DW_AT_extension";
9401 return "DW_AT_ranges";
9402 case DW_AT_trampoline:
9403 return "DW_AT_trampoline";
9404 case DW_AT_call_column:
9405 return "DW_AT_call_column";
9406 case DW_AT_call_file:
9407 return "DW_AT_call_file";
9408 case DW_AT_call_line:
9409 return "DW_AT_call_line";
9410 case DW_AT_description:
9411 return "DW_AT_description";
9412 case DW_AT_binary_scale:
9413 return "DW_AT_binary_scale";
9414 case DW_AT_decimal_scale:
9415 return "DW_AT_decimal_scale";
9417 return "DW_AT_small";
9418 case DW_AT_decimal_sign:
9419 return "DW_AT_decimal_sign";
9420 case DW_AT_digit_count:
9421 return "DW_AT_digit_count";
9422 case DW_AT_picture_string:
9423 return "DW_AT_picture_string";
9425 return "DW_AT_mutable";
9426 case DW_AT_threads_scaled:
9427 return "DW_AT_threads_scaled";
9428 case DW_AT_explicit:
9429 return "DW_AT_explicit";
9430 case DW_AT_object_pointer:
9431 return "DW_AT_object_pointer";
9432 case DW_AT_endianity:
9433 return "DW_AT_endianity";
9434 case DW_AT_elemental:
9435 return "DW_AT_elemental";
9437 return "DW_AT_pure";
9438 case DW_AT_recursive:
9439 return "DW_AT_recursive";
9440 /* DWARF 4 values. */
9441 case DW_AT_signature:
9442 return "DW_AT_signature";
9443 /* SGI/MIPS extensions. */
9444 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9445 case DW_AT_MIPS_fde:
9446 return "DW_AT_MIPS_fde";
9448 case DW_AT_MIPS_loop_begin:
9449 return "DW_AT_MIPS_loop_begin";
9450 case DW_AT_MIPS_tail_loop_begin:
9451 return "DW_AT_MIPS_tail_loop_begin";
9452 case DW_AT_MIPS_epilog_begin:
9453 return "DW_AT_MIPS_epilog_begin";
9454 case DW_AT_MIPS_loop_unroll_factor:
9455 return "DW_AT_MIPS_loop_unroll_factor";
9456 case DW_AT_MIPS_software_pipeline_depth:
9457 return "DW_AT_MIPS_software_pipeline_depth";
9458 case DW_AT_MIPS_linkage_name:
9459 return "DW_AT_MIPS_linkage_name";
9460 case DW_AT_MIPS_stride:
9461 return "DW_AT_MIPS_stride";
9462 case DW_AT_MIPS_abstract_name:
9463 return "DW_AT_MIPS_abstract_name";
9464 case DW_AT_MIPS_clone_origin:
9465 return "DW_AT_MIPS_clone_origin";
9466 case DW_AT_MIPS_has_inlines:
9467 return "DW_AT_MIPS_has_inlines";
9468 /* HP extensions. */
9469 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9470 case DW_AT_HP_block_index:
9471 return "DW_AT_HP_block_index";
9473 case DW_AT_HP_unmodifiable:
9474 return "DW_AT_HP_unmodifiable";
9475 case DW_AT_HP_actuals_stmt_list:
9476 return "DW_AT_HP_actuals_stmt_list";
9477 case DW_AT_HP_proc_per_section:
9478 return "DW_AT_HP_proc_per_section";
9479 case DW_AT_HP_raw_data_ptr:
9480 return "DW_AT_HP_raw_data_ptr";
9481 case DW_AT_HP_pass_by_reference:
9482 return "DW_AT_HP_pass_by_reference";
9483 case DW_AT_HP_opt_level:
9484 return "DW_AT_HP_opt_level";
9485 case DW_AT_HP_prof_version_id:
9486 return "DW_AT_HP_prof_version_id";
9487 case DW_AT_HP_opt_flags:
9488 return "DW_AT_HP_opt_flags";
9489 case DW_AT_HP_cold_region_low_pc:
9490 return "DW_AT_HP_cold_region_low_pc";
9491 case DW_AT_HP_cold_region_high_pc:
9492 return "DW_AT_HP_cold_region_high_pc";
9493 case DW_AT_HP_all_variables_modifiable:
9494 return "DW_AT_HP_all_variables_modifiable";
9495 case DW_AT_HP_linkage_name:
9496 return "DW_AT_HP_linkage_name";
9497 case DW_AT_HP_prof_flags:
9498 return "DW_AT_HP_prof_flags";
9499 /* GNU extensions. */
9500 case DW_AT_sf_names:
9501 return "DW_AT_sf_names";
9502 case DW_AT_src_info:
9503 return "DW_AT_src_info";
9504 case DW_AT_mac_info:
9505 return "DW_AT_mac_info";
9506 case DW_AT_src_coords:
9507 return "DW_AT_src_coords";
9508 case DW_AT_body_begin:
9509 return "DW_AT_body_begin";
9510 case DW_AT_body_end:
9511 return "DW_AT_body_end";
9512 case DW_AT_GNU_vector:
9513 return "DW_AT_GNU_vector";
9514 /* VMS extensions. */
9515 case DW_AT_VMS_rtnbeg_pd_address:
9516 return "DW_AT_VMS_rtnbeg_pd_address";
9517 /* UPC extension. */
9518 case DW_AT_upc_threads_scaled:
9519 return "DW_AT_upc_threads_scaled";
9520 /* PGI (STMicroelectronics) extensions. */
9521 case DW_AT_PGI_lbase:
9522 return "DW_AT_PGI_lbase";
9523 case DW_AT_PGI_soffset:
9524 return "DW_AT_PGI_soffset";
9525 case DW_AT_PGI_lstride:
9526 return "DW_AT_PGI_lstride";
9528 return "DW_AT_<unknown>";
9532 /* Convert a DWARF value form code into its string name. */
9535 dwarf_form_name (unsigned form)
9540 return "DW_FORM_addr";
9541 case DW_FORM_block2:
9542 return "DW_FORM_block2";
9543 case DW_FORM_block4:
9544 return "DW_FORM_block4";
9546 return "DW_FORM_data2";
9548 return "DW_FORM_data4";
9550 return "DW_FORM_data8";
9551 case DW_FORM_string:
9552 return "DW_FORM_string";
9554 return "DW_FORM_block";
9555 case DW_FORM_block1:
9556 return "DW_FORM_block1";
9558 return "DW_FORM_data1";
9560 return "DW_FORM_flag";
9562 return "DW_FORM_sdata";
9564 return "DW_FORM_strp";
9566 return "DW_FORM_udata";
9567 case DW_FORM_ref_addr:
9568 return "DW_FORM_ref_addr";
9570 return "DW_FORM_ref1";
9572 return "DW_FORM_ref2";
9574 return "DW_FORM_ref4";
9576 return "DW_FORM_ref8";
9577 case DW_FORM_ref_udata:
9578 return "DW_FORM_ref_udata";
9579 case DW_FORM_indirect:
9580 return "DW_FORM_indirect";
9581 case DW_FORM_sec_offset:
9582 return "DW_FORM_sec_offset";
9583 case DW_FORM_exprloc:
9584 return "DW_FORM_exprloc";
9585 case DW_FORM_flag_present:
9586 return "DW_FORM_flag_present";
9588 return "DW_FORM_sig8";
9590 return "DW_FORM_<unknown>";
9594 /* Convert a DWARF stack opcode into its string name. */
9597 dwarf_stack_op_name (unsigned op)
9602 return "DW_OP_addr";
9604 return "DW_OP_deref";
9606 return "DW_OP_const1u";
9608 return "DW_OP_const1s";
9610 return "DW_OP_const2u";
9612 return "DW_OP_const2s";
9614 return "DW_OP_const4u";
9616 return "DW_OP_const4s";
9618 return "DW_OP_const8u";
9620 return "DW_OP_const8s";
9622 return "DW_OP_constu";
9624 return "DW_OP_consts";
9628 return "DW_OP_drop";
9630 return "DW_OP_over";
9632 return "DW_OP_pick";
9634 return "DW_OP_swap";
9638 return "DW_OP_xderef";
9646 return "DW_OP_minus";
9658 return "DW_OP_plus";
9659 case DW_OP_plus_uconst:
9660 return "DW_OP_plus_uconst";
9666 return "DW_OP_shra";
9684 return "DW_OP_skip";
9686 return "DW_OP_lit0";
9688 return "DW_OP_lit1";
9690 return "DW_OP_lit2";
9692 return "DW_OP_lit3";
9694 return "DW_OP_lit4";
9696 return "DW_OP_lit5";
9698 return "DW_OP_lit6";
9700 return "DW_OP_lit7";
9702 return "DW_OP_lit8";
9704 return "DW_OP_lit9";
9706 return "DW_OP_lit10";
9708 return "DW_OP_lit11";
9710 return "DW_OP_lit12";
9712 return "DW_OP_lit13";
9714 return "DW_OP_lit14";
9716 return "DW_OP_lit15";
9718 return "DW_OP_lit16";
9720 return "DW_OP_lit17";
9722 return "DW_OP_lit18";
9724 return "DW_OP_lit19";
9726 return "DW_OP_lit20";
9728 return "DW_OP_lit21";
9730 return "DW_OP_lit22";
9732 return "DW_OP_lit23";
9734 return "DW_OP_lit24";
9736 return "DW_OP_lit25";
9738 return "DW_OP_lit26";
9740 return "DW_OP_lit27";
9742 return "DW_OP_lit28";
9744 return "DW_OP_lit29";
9746 return "DW_OP_lit30";
9748 return "DW_OP_lit31";
9750 return "DW_OP_reg0";
9752 return "DW_OP_reg1";
9754 return "DW_OP_reg2";
9756 return "DW_OP_reg3";
9758 return "DW_OP_reg4";
9760 return "DW_OP_reg5";
9762 return "DW_OP_reg6";
9764 return "DW_OP_reg7";
9766 return "DW_OP_reg8";
9768 return "DW_OP_reg9";
9770 return "DW_OP_reg10";
9772 return "DW_OP_reg11";
9774 return "DW_OP_reg12";
9776 return "DW_OP_reg13";
9778 return "DW_OP_reg14";
9780 return "DW_OP_reg15";
9782 return "DW_OP_reg16";
9784 return "DW_OP_reg17";
9786 return "DW_OP_reg18";
9788 return "DW_OP_reg19";
9790 return "DW_OP_reg20";
9792 return "DW_OP_reg21";
9794 return "DW_OP_reg22";
9796 return "DW_OP_reg23";
9798 return "DW_OP_reg24";
9800 return "DW_OP_reg25";
9802 return "DW_OP_reg26";
9804 return "DW_OP_reg27";
9806 return "DW_OP_reg28";
9808 return "DW_OP_reg29";
9810 return "DW_OP_reg30";
9812 return "DW_OP_reg31";
9814 return "DW_OP_breg0";
9816 return "DW_OP_breg1";
9818 return "DW_OP_breg2";
9820 return "DW_OP_breg3";
9822 return "DW_OP_breg4";
9824 return "DW_OP_breg5";
9826 return "DW_OP_breg6";
9828 return "DW_OP_breg7";
9830 return "DW_OP_breg8";
9832 return "DW_OP_breg9";
9834 return "DW_OP_breg10";
9836 return "DW_OP_breg11";
9838 return "DW_OP_breg12";
9840 return "DW_OP_breg13";
9842 return "DW_OP_breg14";
9844 return "DW_OP_breg15";
9846 return "DW_OP_breg16";
9848 return "DW_OP_breg17";
9850 return "DW_OP_breg18";
9852 return "DW_OP_breg19";
9854 return "DW_OP_breg20";
9856 return "DW_OP_breg21";
9858 return "DW_OP_breg22";
9860 return "DW_OP_breg23";
9862 return "DW_OP_breg24";
9864 return "DW_OP_breg25";
9866 return "DW_OP_breg26";
9868 return "DW_OP_breg27";
9870 return "DW_OP_breg28";
9872 return "DW_OP_breg29";
9874 return "DW_OP_breg30";
9876 return "DW_OP_breg31";
9878 return "DW_OP_regx";
9880 return "DW_OP_fbreg";
9882 return "DW_OP_bregx";
9884 return "DW_OP_piece";
9885 case DW_OP_deref_size:
9886 return "DW_OP_deref_size";
9887 case DW_OP_xderef_size:
9888 return "DW_OP_xderef_size";
9891 /* DWARF 3 extensions. */
9892 case DW_OP_push_object_address:
9893 return "DW_OP_push_object_address";
9895 return "DW_OP_call2";
9897 return "DW_OP_call4";
9898 case DW_OP_call_ref:
9899 return "DW_OP_call_ref";
9900 /* GNU extensions. */
9901 case DW_OP_form_tls_address:
9902 return "DW_OP_form_tls_address";
9903 case DW_OP_call_frame_cfa:
9904 return "DW_OP_call_frame_cfa";
9905 case DW_OP_bit_piece:
9906 return "DW_OP_bit_piece";
9907 case DW_OP_GNU_push_tls_address:
9908 return "DW_OP_GNU_push_tls_address";
9909 case DW_OP_GNU_uninit:
9910 return "DW_OP_GNU_uninit";
9911 /* HP extensions. */
9912 case DW_OP_HP_is_value:
9913 return "DW_OP_HP_is_value";
9914 case DW_OP_HP_fltconst4:
9915 return "DW_OP_HP_fltconst4";
9916 case DW_OP_HP_fltconst8:
9917 return "DW_OP_HP_fltconst8";
9918 case DW_OP_HP_mod_range:
9919 return "DW_OP_HP_mod_range";
9920 case DW_OP_HP_unmod_range:
9921 return "DW_OP_HP_unmod_range";
9923 return "DW_OP_HP_tls";
9925 return "OP_<unknown>";
9930 dwarf_bool_name (unsigned mybool)
9938 /* Convert a DWARF type code into its string name. */
9941 dwarf_type_encoding_name (unsigned enc)
9946 return "DW_ATE_void";
9947 case DW_ATE_address:
9948 return "DW_ATE_address";
9949 case DW_ATE_boolean:
9950 return "DW_ATE_boolean";
9951 case DW_ATE_complex_float:
9952 return "DW_ATE_complex_float";
9954 return "DW_ATE_float";
9956 return "DW_ATE_signed";
9957 case DW_ATE_signed_char:
9958 return "DW_ATE_signed_char";
9959 case DW_ATE_unsigned:
9960 return "DW_ATE_unsigned";
9961 case DW_ATE_unsigned_char:
9962 return "DW_ATE_unsigned_char";
9964 case DW_ATE_imaginary_float:
9965 return "DW_ATE_imaginary_float";
9966 case DW_ATE_packed_decimal:
9967 return "DW_ATE_packed_decimal";
9968 case DW_ATE_numeric_string:
9969 return "DW_ATE_numeric_string";
9971 return "DW_ATE_edited";
9972 case DW_ATE_signed_fixed:
9973 return "DW_ATE_signed_fixed";
9974 case DW_ATE_unsigned_fixed:
9975 return "DW_ATE_unsigned_fixed";
9976 case DW_ATE_decimal_float:
9977 return "DW_ATE_decimal_float";
9978 /* HP extensions. */
9979 case DW_ATE_HP_float80:
9980 return "DW_ATE_HP_float80";
9981 case DW_ATE_HP_complex_float80:
9982 return "DW_ATE_HP_complex_float80";
9983 case DW_ATE_HP_float128:
9984 return "DW_ATE_HP_float128";
9985 case DW_ATE_HP_complex_float128:
9986 return "DW_ATE_HP_complex_float128";
9987 case DW_ATE_HP_floathpintel:
9988 return "DW_ATE_HP_floathpintel";
9989 case DW_ATE_HP_imaginary_float80:
9990 return "DW_ATE_HP_imaginary_float80";
9991 case DW_ATE_HP_imaginary_float128:
9992 return "DW_ATE_HP_imaginary_float128";
9994 return "DW_ATE_<unknown>";
9998 /* Convert a DWARF call frame info operation to its string name. */
10002 dwarf_cfi_name (unsigned cfi_opc)
10006 case DW_CFA_advance_loc:
10007 return "DW_CFA_advance_loc";
10008 case DW_CFA_offset:
10009 return "DW_CFA_offset";
10010 case DW_CFA_restore:
10011 return "DW_CFA_restore";
10013 return "DW_CFA_nop";
10014 case DW_CFA_set_loc:
10015 return "DW_CFA_set_loc";
10016 case DW_CFA_advance_loc1:
10017 return "DW_CFA_advance_loc1";
10018 case DW_CFA_advance_loc2:
10019 return "DW_CFA_advance_loc2";
10020 case DW_CFA_advance_loc4:
10021 return "DW_CFA_advance_loc4";
10022 case DW_CFA_offset_extended:
10023 return "DW_CFA_offset_extended";
10024 case DW_CFA_restore_extended:
10025 return "DW_CFA_restore_extended";
10026 case DW_CFA_undefined:
10027 return "DW_CFA_undefined";
10028 case DW_CFA_same_value:
10029 return "DW_CFA_same_value";
10030 case DW_CFA_register:
10031 return "DW_CFA_register";
10032 case DW_CFA_remember_state:
10033 return "DW_CFA_remember_state";
10034 case DW_CFA_restore_state:
10035 return "DW_CFA_restore_state";
10036 case DW_CFA_def_cfa:
10037 return "DW_CFA_def_cfa";
10038 case DW_CFA_def_cfa_register:
10039 return "DW_CFA_def_cfa_register";
10040 case DW_CFA_def_cfa_offset:
10041 return "DW_CFA_def_cfa_offset";
10043 case DW_CFA_def_cfa_expression:
10044 return "DW_CFA_def_cfa_expression";
10045 case DW_CFA_expression:
10046 return "DW_CFA_expression";
10047 case DW_CFA_offset_extended_sf:
10048 return "DW_CFA_offset_extended_sf";
10049 case DW_CFA_def_cfa_sf:
10050 return "DW_CFA_def_cfa_sf";
10051 case DW_CFA_def_cfa_offset_sf:
10052 return "DW_CFA_def_cfa_offset_sf";
10053 case DW_CFA_val_offset:
10054 return "DW_CFA_val_offset";
10055 case DW_CFA_val_offset_sf:
10056 return "DW_CFA_val_offset_sf";
10057 case DW_CFA_val_expression:
10058 return "DW_CFA_val_expression";
10059 /* SGI/MIPS specific. */
10060 case DW_CFA_MIPS_advance_loc8:
10061 return "DW_CFA_MIPS_advance_loc8";
10062 /* GNU extensions. */
10063 case DW_CFA_GNU_window_save:
10064 return "DW_CFA_GNU_window_save";
10065 case DW_CFA_GNU_args_size:
10066 return "DW_CFA_GNU_args_size";
10067 case DW_CFA_GNU_negative_offset_extended:
10068 return "DW_CFA_GNU_negative_offset_extended";
10070 return "DW_CFA_<unknown>";
10076 dump_die_shallow (struct ui_file *f, int indent, struct die_info *die)
10080 print_spaces (indent, f);
10081 fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n",
10082 dwarf_tag_name (die->tag), die->abbrev, die->offset);
10084 if (die->parent != NULL)
10086 print_spaces (indent, f);
10087 fprintf_unfiltered (f, " parent at offset: 0x%x\n",
10088 die->parent->offset);
10091 print_spaces (indent, f);
10092 fprintf_unfiltered (f, " has children: %s\n",
10093 dwarf_bool_name (die->child != NULL));
10095 print_spaces (indent, f);
10096 fprintf_unfiltered (f, " attributes:\n");
10098 for (i = 0; i < die->num_attrs; ++i)
10100 print_spaces (indent, f);
10101 fprintf_unfiltered (f, " %s (%s) ",
10102 dwarf_attr_name (die->attrs[i].name),
10103 dwarf_form_name (die->attrs[i].form));
10105 switch (die->attrs[i].form)
10107 case DW_FORM_ref_addr:
10109 fprintf_unfiltered (f, "address: ");
10110 fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f);
10112 case DW_FORM_block2:
10113 case DW_FORM_block4:
10114 case DW_FORM_block:
10115 case DW_FORM_block1:
10116 fprintf_unfiltered (f, "block: size %d", DW_BLOCK (&die->attrs[i])->size);
10121 fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)",
10122 (long) (DW_ADDR (&die->attrs[i])));
10124 case DW_FORM_data1:
10125 case DW_FORM_data2:
10126 case DW_FORM_data4:
10127 case DW_FORM_data8:
10128 case DW_FORM_udata:
10129 case DW_FORM_sdata:
10130 fprintf_unfiltered (f, "constant: %s",
10131 pulongest (DW_UNSND (&die->attrs[i])));
10134 if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL)
10135 fprintf_unfiltered (f, "signatured type, offset: 0x%x",
10136 DW_SIGNATURED_TYPE (&die->attrs[i])->offset);
10138 fprintf_unfiltered (f, "signatured type, offset: unknown");
10140 case DW_FORM_string:
10142 fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)",
10143 DW_STRING (&die->attrs[i])
10144 ? DW_STRING (&die->attrs[i]) : "",
10145 DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not");
10148 if (DW_UNSND (&die->attrs[i]))
10149 fprintf_unfiltered (f, "flag: TRUE");
10151 fprintf_unfiltered (f, "flag: FALSE");
10153 case DW_FORM_indirect:
10154 /* the reader will have reduced the indirect form to
10155 the "base form" so this form should not occur */
10156 fprintf_unfiltered (f, "unexpected attribute form: DW_FORM_indirect");
10159 fprintf_unfiltered (f, "unsupported attribute form: %d.",
10160 die->attrs[i].form);
10163 fprintf_unfiltered (f, "\n");
10168 dump_die_for_error (struct die_info *die)
10170 dump_die_shallow (gdb_stderr, 0, die);
10174 dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die)
10176 int indent = level * 4;
10178 gdb_assert (die != NULL);
10180 if (level >= max_level)
10183 dump_die_shallow (f, indent, die);
10185 if (die->child != NULL)
10187 print_spaces (indent, f);
10188 fprintf_unfiltered (f, " Children:");
10189 if (level + 1 < max_level)
10191 fprintf_unfiltered (f, "\n");
10192 dump_die_1 (f, level + 1, max_level, die->child);
10196 fprintf_unfiltered (f, " [not printed, max nesting level reached]\n");
10200 if (die->sibling != NULL && level > 0)
10202 dump_die_1 (f, level, max_level, die->sibling);
10206 /* This is called from the pdie macro in gdbinit.in.
10207 It's not static so gcc will keep a copy callable from gdb. */
10210 dump_die (struct die_info *die, int max_level)
10212 dump_die_1 (gdb_stdlog, 0, max_level, die);
10216 store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu)
10220 slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset, INSERT);
10226 is_ref_attr (struct attribute *attr)
10228 switch (attr->form)
10230 case DW_FORM_ref_addr:
10235 case DW_FORM_ref_udata:
10242 static unsigned int
10243 dwarf2_get_ref_die_offset (struct attribute *attr)
10245 if (is_ref_attr (attr))
10246 return DW_ADDR (attr);
10248 complaint (&symfile_complaints,
10249 _("unsupported die ref attribute form: '%s'"),
10250 dwarf_form_name (attr->form));
10254 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10255 * the value held by the attribute is not constant. */
10258 dwarf2_get_attr_constant_value (struct attribute *attr, int default_value)
10260 if (attr->form == DW_FORM_sdata)
10261 return DW_SND (attr);
10262 else if (attr->form == DW_FORM_udata
10263 || attr->form == DW_FORM_data1
10264 || attr->form == DW_FORM_data2
10265 || attr->form == DW_FORM_data4
10266 || attr->form == DW_FORM_data8)
10267 return DW_UNSND (attr);
10270 complaint (&symfile_complaints, _("Attribute value is not a constant (%s)"),
10271 dwarf_form_name (attr->form));
10272 return default_value;
10276 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10277 unit and add it to our queue.
10278 The result is non-zero if PER_CU was queued, otherwise the result is zero
10279 meaning either PER_CU is already queued or it is already loaded. */
10282 maybe_queue_comp_unit (struct dwarf2_cu *this_cu,
10283 struct dwarf2_per_cu_data *per_cu)
10285 /* Mark the dependence relation so that we don't flush PER_CU
10287 dwarf2_add_dependence (this_cu, per_cu);
10289 /* If it's already on the queue, we have nothing to do. */
10290 if (per_cu->queued)
10293 /* If the compilation unit is already loaded, just mark it as
10295 if (per_cu->cu != NULL)
10297 per_cu->cu->last_used = 0;
10301 /* Add it to the queue. */
10302 queue_comp_unit (per_cu, this_cu->objfile);
10307 /* Follow reference or signature attribute ATTR of SRC_DIE.
10308 On entry *REF_CU is the CU of SRC_DIE.
10309 On exit *REF_CU is the CU of the result. */
10311 static struct die_info *
10312 follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr,
10313 struct dwarf2_cu **ref_cu)
10315 struct die_info *die;
10317 if (is_ref_attr (attr))
10318 die = follow_die_ref (src_die, attr, ref_cu);
10319 else if (attr->form == DW_FORM_sig8)
10320 die = follow_die_sig (src_die, attr, ref_cu);
10323 dump_die_for_error (src_die);
10324 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10325 (*ref_cu)->objfile->name);
10331 /* Follow reference attribute ATTR of SRC_DIE.
10332 On entry *REF_CU is the CU of SRC_DIE.
10333 On exit *REF_CU is the CU of the result. */
10335 static struct die_info *
10336 follow_die_ref (struct die_info *src_die, struct attribute *attr,
10337 struct dwarf2_cu **ref_cu)
10339 struct die_info *die;
10340 unsigned int offset;
10341 struct die_info temp_die;
10342 struct dwarf2_cu *target_cu, *cu = *ref_cu;
10344 gdb_assert (cu->per_cu != NULL);
10346 offset = dwarf2_get_ref_die_offset (attr);
10348 if (cu->per_cu->from_debug_types)
10350 /* .debug_types CUs cannot reference anything outside their CU.
10351 If they need to, they have to reference a signatured type via
10353 if (! offset_in_cu_p (&cu->header, offset))
10357 else if (! offset_in_cu_p (&cu->header, offset))
10359 struct dwarf2_per_cu_data *per_cu;
10360 per_cu = dwarf2_find_containing_comp_unit (offset, cu->objfile);
10362 /* If necessary, add it to the queue and load its DIEs. */
10363 if (maybe_queue_comp_unit (cu, per_cu))
10364 load_full_comp_unit (per_cu, cu->objfile);
10366 target_cu = per_cu->cu;
10371 *ref_cu = target_cu;
10372 temp_die.offset = offset;
10373 die = htab_find_with_hash (target_cu->die_hash, &temp_die, offset);
10379 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10380 "at 0x%x [in module %s]"),
10381 offset, src_die->offset, cu->objfile->name);
10384 /* Follow the signature attribute ATTR in SRC_DIE.
10385 On entry *REF_CU is the CU of SRC_DIE.
10386 On exit *REF_CU is the CU of the result. */
10388 static struct die_info *
10389 follow_die_sig (struct die_info *src_die, struct attribute *attr,
10390 struct dwarf2_cu **ref_cu)
10392 struct objfile *objfile = (*ref_cu)->objfile;
10393 struct die_info temp_die;
10394 struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
10395 struct dwarf2_cu *sig_cu;
10396 struct die_info *die;
10398 /* sig_type will be NULL if the signatured type is missing from
10400 if (sig_type == NULL)
10401 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10402 "at 0x%x [in module %s]"),
10403 src_die->offset, objfile->name);
10405 /* If necessary, add it to the queue and load its DIEs. */
10407 if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu))
10408 read_signatured_type (objfile, sig_type);
10410 gdb_assert (sig_type->per_cu.cu != NULL);
10412 sig_cu = sig_type->per_cu.cu;
10413 temp_die.offset = sig_cu->header.offset + sig_type->type_offset;
10414 die = htab_find_with_hash (sig_cu->die_hash, &temp_die, temp_die.offset);
10421 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10422 "at 0x%x [in module %s]"),
10423 sig_type->type_offset, src_die->offset, objfile->name);
10426 /* Given an offset of a signatured type, return its signatured_type. */
10428 static struct signatured_type *
10429 lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
10431 gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
10432 unsigned int length, initial_length_size;
10433 unsigned int sig_offset;
10434 struct signatured_type find_entry, *type_sig;
10436 length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size);
10437 sig_offset = (initial_length_size
10439 + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/
10440 + 1 /*address_size*/);
10441 find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset);
10442 type_sig = htab_find (dwarf2_per_objfile->signatured_types, &find_entry);
10444 /* This is only used to lookup previously recorded types.
10445 If we didn't find it, it's our bug. */
10446 gdb_assert (type_sig != NULL);
10447 gdb_assert (offset == type_sig->offset);
10452 /* Read in signatured type at OFFSET and build its CU and die(s). */
10455 read_signatured_type_at_offset (struct objfile *objfile,
10456 unsigned int offset)
10458 struct signatured_type *type_sig;
10460 /* We have the section offset, but we need the signature to do the
10461 hash table lookup. */
10462 type_sig = lookup_signatured_type_at_offset (objfile, offset);
10464 gdb_assert (type_sig->per_cu.cu == NULL);
10466 read_signatured_type (objfile, type_sig);
10468 gdb_assert (type_sig->per_cu.cu != NULL);
10471 /* Read in a signatured type and build its CU and DIEs. */
10474 read_signatured_type (struct objfile *objfile,
10475 struct signatured_type *type_sig)
10477 gdb_byte *types_ptr = dwarf2_per_objfile->types.buffer + type_sig->offset;
10478 struct die_reader_specs reader_specs;
10479 struct dwarf2_cu *cu;
10480 ULONGEST signature;
10481 struct cleanup *back_to, *free_cu_cleanup;
10482 struct attribute *attr;
10484 gdb_assert (type_sig->per_cu.cu == NULL);
10486 cu = xmalloc (sizeof (struct dwarf2_cu));
10487 memset (cu, 0, sizeof (struct dwarf2_cu));
10488 obstack_init (&cu->comp_unit_obstack);
10489 cu->objfile = objfile;
10490 type_sig->per_cu.cu = cu;
10491 cu->per_cu = &type_sig->per_cu;
10493 /* If an error occurs while loading, release our storage. */
10494 free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
10496 types_ptr = read_type_comp_unit_head (&cu->header, &signature,
10497 types_ptr, objfile->obfd);
10498 gdb_assert (signature == type_sig->signature);
10501 = htab_create_alloc_ex (cu->header.length / 12,
10505 &cu->comp_unit_obstack,
10506 hashtab_obstack_allocate,
10507 dummy_obstack_deallocate);
10509 dwarf2_read_abbrevs (cu->objfile->obfd, cu);
10510 back_to = make_cleanup (dwarf2_free_abbrev_table, cu);
10512 init_cu_die_reader (&reader_specs, cu);
10514 cu->dies = read_die_and_children (&reader_specs, types_ptr, &types_ptr,
10517 /* We try not to read any attributes in this function, because not
10518 all objfiles needed for references have been loaded yet, and symbol
10519 table processing isn't initialized. But we have to set the CU language,
10520 or we won't be able to build types correctly. */
10521 attr = dwarf2_attr (cu->dies, DW_AT_language, cu);
10523 set_cu_language (DW_UNSND (attr), cu);
10525 set_cu_language (language_minimal, cu);
10527 do_cleanups (back_to);
10529 /* We've successfully allocated this compilation unit. Let our caller
10530 clean it up when finished with it. */
10531 discard_cleanups (free_cu_cleanup);
10533 type_sig->per_cu.cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
10534 dwarf2_per_objfile->read_in_chain = &type_sig->per_cu;
10537 /* Decode simple location descriptions.
10538 Given a pointer to a dwarf block that defines a location, compute
10539 the location and return the value.
10541 NOTE drow/2003-11-18: This function is called in two situations
10542 now: for the address of static or global variables (partial symbols
10543 only) and for offsets into structures which are expected to be
10544 (more or less) constant. The partial symbol case should go away,
10545 and only the constant case should remain. That will let this
10546 function complain more accurately. A few special modes are allowed
10547 without complaint for global variables (for instance, global
10548 register values and thread-local values).
10550 A location description containing no operations indicates that the
10551 object is optimized out. The return value is 0 for that case.
10552 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10553 callers will only want a very basic result and this can become a
10556 Note that stack[0] is unused except as a default error return.
10557 Note that stack overflow is not yet handled. */
10560 decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
10562 struct objfile *objfile = cu->objfile;
10563 struct comp_unit_head *cu_header = &cu->header;
10565 int size = blk->size;
10566 gdb_byte *data = blk->data;
10567 CORE_ADDR stack[64];
10569 unsigned int bytes_read, unsnd;
10613 stack[++stacki] = op - DW_OP_lit0;
10648 stack[++stacki] = op - DW_OP_reg0;
10650 dwarf2_complex_location_expr_complaint ();
10654 unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10656 stack[++stacki] = unsnd;
10658 dwarf2_complex_location_expr_complaint ();
10662 stack[++stacki] = read_address (objfile->obfd, &data[i],
10667 case DW_OP_const1u:
10668 stack[++stacki] = read_1_byte (objfile->obfd, &data[i]);
10672 case DW_OP_const1s:
10673 stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]);
10677 case DW_OP_const2u:
10678 stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]);
10682 case DW_OP_const2s:
10683 stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]);
10687 case DW_OP_const4u:
10688 stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]);
10692 case DW_OP_const4s:
10693 stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]);
10698 stack[++stacki] = read_unsigned_leb128 (NULL, (data + i),
10704 stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read);
10709 stack[stacki + 1] = stack[stacki];
10714 stack[stacki - 1] += stack[stacki];
10718 case DW_OP_plus_uconst:
10719 stack[stacki] += read_unsigned_leb128 (NULL, (data + i), &bytes_read);
10724 stack[stacki - 1] -= stack[stacki];
10729 /* If we're not the last op, then we definitely can't encode
10730 this using GDB's address_class enum. This is valid for partial
10731 global symbols, although the variable's address will be bogus
10734 dwarf2_complex_location_expr_complaint ();
10737 case DW_OP_GNU_push_tls_address:
10738 /* The top of the stack has the offset from the beginning
10739 of the thread control block at which the variable is located. */
10740 /* Nothing should follow this operator, so the top of stack would
10742 /* This is valid for partial global symbols, but the variable's
10743 address will be bogus in the psymtab. */
10745 dwarf2_complex_location_expr_complaint ();
10748 case DW_OP_GNU_uninit:
10752 complaint (&symfile_complaints, _("unsupported stack op: '%s'"),
10753 dwarf_stack_op_name (op));
10754 return (stack[stacki]);
10757 return (stack[stacki]);
10760 /* memory allocation interface */
10762 static struct dwarf_block *
10763 dwarf_alloc_block (struct dwarf2_cu *cu)
10765 struct dwarf_block *blk;
10767 blk = (struct dwarf_block *)
10768 obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block));
10772 static struct abbrev_info *
10773 dwarf_alloc_abbrev (struct dwarf2_cu *cu)
10775 struct abbrev_info *abbrev;
10777 abbrev = (struct abbrev_info *)
10778 obstack_alloc (&cu->abbrev_obstack, sizeof (struct abbrev_info));
10779 memset (abbrev, 0, sizeof (struct abbrev_info));
10783 static struct die_info *
10784 dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs)
10786 struct die_info *die;
10787 size_t size = sizeof (struct die_info);
10790 size += (num_attrs - 1) * sizeof (struct attribute);
10792 die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size);
10793 memset (die, 0, sizeof (struct die_info));
10798 /* Macro support. */
10801 /* Return the full name of file number I in *LH's file name table.
10802 Use COMP_DIR as the name of the current directory of the
10803 compilation. The result is allocated using xmalloc; the caller is
10804 responsible for freeing it. */
10806 file_full_name (int file, struct line_header *lh, const char *comp_dir)
10808 /* Is the file number a valid index into the line header's file name
10809 table? Remember that file numbers start with one, not zero. */
10810 if (1 <= file && file <= lh->num_file_names)
10812 struct file_entry *fe = &lh->file_names[file - 1];
10814 if (IS_ABSOLUTE_PATH (fe->name))
10815 return xstrdup (fe->name);
10823 dir = lh->include_dirs[fe->dir_index - 1];
10829 dir_len = strlen (dir);
10830 full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1);
10831 strcpy (full_name, dir);
10832 full_name[dir_len] = '/';
10833 strcpy (full_name + dir_len + 1, fe->name);
10837 return xstrdup (fe->name);
10842 /* The compiler produced a bogus file number. We can at least
10843 record the macro definitions made in the file, even if we
10844 won't be able to find the file by name. */
10845 char fake_name[80];
10846 sprintf (fake_name, "<bad macro file number %d>", file);
10848 complaint (&symfile_complaints,
10849 _("bad file number in macro information (%d)"),
10852 return xstrdup (fake_name);
10857 static struct macro_source_file *
10858 macro_start_file (int file, int line,
10859 struct macro_source_file *current_file,
10860 const char *comp_dir,
10861 struct line_header *lh, struct objfile *objfile)
10863 /* The full name of this source file. */
10864 char *full_name = file_full_name (file, lh, comp_dir);
10866 /* We don't create a macro table for this compilation unit
10867 at all until we actually get a filename. */
10868 if (! pending_macros)
10869 pending_macros = new_macro_table (&objfile->objfile_obstack,
10870 objfile->macro_cache);
10872 if (! current_file)
10873 /* If we have no current file, then this must be the start_file
10874 directive for the compilation unit's main source file. */
10875 current_file = macro_set_main (pending_macros, full_name);
10877 current_file = macro_include (current_file, line, full_name);
10881 return current_file;
10885 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10886 followed by a null byte. */
10888 copy_string (const char *buf, int len)
10890 char *s = xmalloc (len + 1);
10891 memcpy (s, buf, len);
10898 static const char *
10899 consume_improper_spaces (const char *p, const char *body)
10903 complaint (&symfile_complaints,
10904 _("macro definition contains spaces in formal argument list:\n`%s'"),
10916 parse_macro_definition (struct macro_source_file *file, int line,
10921 /* The body string takes one of two forms. For object-like macro
10922 definitions, it should be:
10924 <macro name> " " <definition>
10926 For function-like macro definitions, it should be:
10928 <macro name> "() " <definition>
10930 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10932 Spaces may appear only where explicitly indicated, and in the
10935 The Dwarf 2 spec says that an object-like macro's name is always
10936 followed by a space, but versions of GCC around March 2002 omit
10937 the space when the macro's definition is the empty string.
10939 The Dwarf 2 spec says that there should be no spaces between the
10940 formal arguments in a function-like macro's formal argument list,
10941 but versions of GCC around March 2002 include spaces after the
10945 /* Find the extent of the macro name. The macro name is terminated
10946 by either a space or null character (for an object-like macro) or
10947 an opening paren (for a function-like macro). */
10948 for (p = body; *p; p++)
10949 if (*p == ' ' || *p == '(')
10952 if (*p == ' ' || *p == '\0')
10954 /* It's an object-like macro. */
10955 int name_len = p - body;
10956 char *name = copy_string (body, name_len);
10957 const char *replacement;
10960 replacement = body + name_len + 1;
10963 dwarf2_macro_malformed_definition_complaint (body);
10964 replacement = body + name_len;
10967 macro_define_object (file, line, name, replacement);
10971 else if (*p == '(')
10973 /* It's a function-like macro. */
10974 char *name = copy_string (body, p - body);
10977 char **argv = xmalloc (argv_size * sizeof (*argv));
10981 p = consume_improper_spaces (p, body);
10983 /* Parse the formal argument list. */
10984 while (*p && *p != ')')
10986 /* Find the extent of the current argument name. */
10987 const char *arg_start = p;
10989 while (*p && *p != ',' && *p != ')' && *p != ' ')
10992 if (! *p || p == arg_start)
10993 dwarf2_macro_malformed_definition_complaint (body);
10996 /* Make sure argv has room for the new argument. */
10997 if (argc >= argv_size)
11000 argv = xrealloc (argv, argv_size * sizeof (*argv));
11003 argv[argc++] = copy_string (arg_start, p - arg_start);
11006 p = consume_improper_spaces (p, body);
11008 /* Consume the comma, if present. */
11013 p = consume_improper_spaces (p, body);
11022 /* Perfectly formed definition, no complaints. */
11023 macro_define_function (file, line, name,
11024 argc, (const char **) argv,
11026 else if (*p == '\0')
11028 /* Complain, but do define it. */
11029 dwarf2_macro_malformed_definition_complaint (body);
11030 macro_define_function (file, line, name,
11031 argc, (const char **) argv,
11035 /* Just complain. */
11036 dwarf2_macro_malformed_definition_complaint (body);
11039 /* Just complain. */
11040 dwarf2_macro_malformed_definition_complaint (body);
11046 for (i = 0; i < argc; i++)
11052 dwarf2_macro_malformed_definition_complaint (body);
11057 dwarf_decode_macros (struct line_header *lh, unsigned int offset,
11058 char *comp_dir, bfd *abfd,
11059 struct dwarf2_cu *cu)
11061 gdb_byte *mac_ptr, *mac_end;
11062 struct macro_source_file *current_file = 0;
11063 enum dwarf_macinfo_record_type macinfo_type;
11064 int at_commandline;
11066 if (dwarf2_per_objfile->macinfo.buffer == NULL)
11068 complaint (&symfile_complaints, _("missing .debug_macinfo section"));
11072 /* First pass: Find the name of the base filename.
11073 This filename is needed in order to process all macros whose definition
11074 (or undefinition) comes from the command line. These macros are defined
11075 before the first DW_MACINFO_start_file entry, and yet still need to be
11076 associated to the base file.
11078 To determine the base file name, we scan the macro definitions until we
11079 reach the first DW_MACINFO_start_file entry. We then initialize
11080 CURRENT_FILE accordingly so that any macro definition found before the
11081 first DW_MACINFO_start_file can still be associated to the base file. */
11083 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11084 mac_end = dwarf2_per_objfile->macinfo.buffer
11085 + dwarf2_per_objfile->macinfo.size;
11089 /* Do we at least have room for a macinfo type byte? */
11090 if (mac_ptr >= mac_end)
11092 /* Complaint is printed during the second pass as GDB will probably
11093 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11097 macinfo_type = read_1_byte (abfd, mac_ptr);
11100 switch (macinfo_type)
11102 /* A zero macinfo type indicates the end of the macro
11107 case DW_MACINFO_define:
11108 case DW_MACINFO_undef:
11109 /* Only skip the data by MAC_PTR. */
11111 unsigned int bytes_read;
11113 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11114 mac_ptr += bytes_read;
11115 read_string (abfd, mac_ptr, &bytes_read);
11116 mac_ptr += bytes_read;
11120 case DW_MACINFO_start_file:
11122 unsigned int bytes_read;
11125 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11126 mac_ptr += bytes_read;
11127 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11128 mac_ptr += bytes_read;
11130 current_file = macro_start_file (file, line, current_file, comp_dir,
11135 case DW_MACINFO_end_file:
11136 /* No data to skip by MAC_PTR. */
11139 case DW_MACINFO_vendor_ext:
11140 /* Only skip the data by MAC_PTR. */
11142 unsigned int bytes_read;
11144 read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11145 mac_ptr += bytes_read;
11146 read_string (abfd, mac_ptr, &bytes_read);
11147 mac_ptr += bytes_read;
11154 } while (macinfo_type != 0 && current_file == NULL);
11156 /* Second pass: Process all entries.
11158 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11159 command-line macro definitions/undefinitions. This flag is unset when we
11160 reach the first DW_MACINFO_start_file entry. */
11162 mac_ptr = dwarf2_per_objfile->macinfo.buffer + offset;
11164 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11165 GDB is still reading the definitions from command line. First
11166 DW_MACINFO_start_file will need to be ignored as it was already executed
11167 to create CURRENT_FILE for the main source holding also the command line
11168 definitions. On first met DW_MACINFO_start_file this flag is reset to
11169 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11171 at_commandline = 1;
11175 /* Do we at least have room for a macinfo type byte? */
11176 if (mac_ptr >= mac_end)
11178 dwarf2_macros_too_long_complaint ();
11182 macinfo_type = read_1_byte (abfd, mac_ptr);
11185 switch (macinfo_type)
11187 /* A zero macinfo type indicates the end of the macro
11192 case DW_MACINFO_define:
11193 case DW_MACINFO_undef:
11195 unsigned int bytes_read;
11199 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11200 mac_ptr += bytes_read;
11201 body = read_string (abfd, mac_ptr, &bytes_read);
11202 mac_ptr += bytes_read;
11204 if (! current_file)
11206 /* DWARF violation as no main source is present. */
11207 complaint (&symfile_complaints,
11208 _("debug info with no main source gives macro %s "
11210 macinfo_type == DW_MACINFO_define ?
11212 macinfo_type == DW_MACINFO_undef ?
11213 _("undefinition") :
11214 _("something-or-other"), line, body);
11217 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11218 complaint (&symfile_complaints,
11219 _("debug info gives %s macro %s with %s line %d: %s"),
11220 at_commandline ? _("command-line") : _("in-file"),
11221 macinfo_type == DW_MACINFO_define ?
11223 macinfo_type == DW_MACINFO_undef ?
11224 _("undefinition") :
11225 _("something-or-other"),
11226 line == 0 ? _("zero") : _("non-zero"), line, body);
11228 if (macinfo_type == DW_MACINFO_define)
11229 parse_macro_definition (current_file, line, body);
11230 else if (macinfo_type == DW_MACINFO_undef)
11231 macro_undef (current_file, line, body);
11235 case DW_MACINFO_start_file:
11237 unsigned int bytes_read;
11240 line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11241 mac_ptr += bytes_read;
11242 file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11243 mac_ptr += bytes_read;
11245 if ((line == 0 && !at_commandline) || (line != 0 && at_commandline))
11246 complaint (&symfile_complaints,
11247 _("debug info gives source %d included "
11248 "from %s at %s line %d"),
11249 file, at_commandline ? _("command-line") : _("file"),
11250 line == 0 ? _("zero") : _("non-zero"), line);
11252 if (at_commandline)
11254 /* This DW_MACINFO_start_file was executed in the pass one. */
11255 at_commandline = 0;
11258 current_file = macro_start_file (file, line,
11259 current_file, comp_dir,
11264 case DW_MACINFO_end_file:
11265 if (! current_file)
11266 complaint (&symfile_complaints,
11267 _("macro debug info has an unmatched `close_file' directive"));
11270 current_file = current_file->included_by;
11271 if (! current_file)
11273 enum dwarf_macinfo_record_type next_type;
11275 /* GCC circa March 2002 doesn't produce the zero
11276 type byte marking the end of the compilation
11277 unit. Complain if it's not there, but exit no
11280 /* Do we at least have room for a macinfo type byte? */
11281 if (mac_ptr >= mac_end)
11283 dwarf2_macros_too_long_complaint ();
11287 /* We don't increment mac_ptr here, so this is just
11289 next_type = read_1_byte (abfd, mac_ptr);
11290 if (next_type != 0)
11291 complaint (&symfile_complaints,
11292 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11299 case DW_MACINFO_vendor_ext:
11301 unsigned int bytes_read;
11305 constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read);
11306 mac_ptr += bytes_read;
11307 string = read_string (abfd, mac_ptr, &bytes_read);
11308 mac_ptr += bytes_read;
11310 /* We don't recognize any vendor extensions. */
11314 } while (macinfo_type != 0);
11317 /* Check if the attribute's form is a DW_FORM_block*
11318 if so return true else false. */
11320 attr_form_is_block (struct attribute *attr)
11322 return (attr == NULL ? 0 :
11323 attr->form == DW_FORM_block1
11324 || attr->form == DW_FORM_block2
11325 || attr->form == DW_FORM_block4
11326 || attr->form == DW_FORM_block);
11329 /* Return non-zero if ATTR's value is a section offset --- classes
11330 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11331 You may use DW_UNSND (attr) to retrieve such offsets.
11333 Section 7.5.4, "Attribute Encodings", explains that no attribute
11334 may have a value that belongs to more than one of these classes; it
11335 would be ambiguous if we did, because we use the same forms for all
11338 attr_form_is_section_offset (struct attribute *attr)
11340 return (attr->form == DW_FORM_data4
11341 || attr->form == DW_FORM_data8);
11345 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11346 zero otherwise. When this function returns true, you can apply
11347 dwarf2_get_attr_constant_value to it.
11349 However, note that for some attributes you must check
11350 attr_form_is_section_offset before using this test. DW_FORM_data4
11351 and DW_FORM_data8 are members of both the constant class, and of
11352 the classes that contain offsets into other debug sections
11353 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11354 that, if an attribute's can be either a constant or one of the
11355 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11356 taken as section offsets, not constants. */
11358 attr_form_is_constant (struct attribute *attr)
11360 switch (attr->form)
11362 case DW_FORM_sdata:
11363 case DW_FORM_udata:
11364 case DW_FORM_data1:
11365 case DW_FORM_data2:
11366 case DW_FORM_data4:
11367 case DW_FORM_data8:
11375 dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym,
11376 struct dwarf2_cu *cu)
11378 if (attr_form_is_section_offset (attr)
11379 /* ".debug_loc" may not exist at all, or the offset may be outside
11380 the section. If so, fall through to the complaint in the
11382 && DW_UNSND (attr) < dwarf2_per_objfile->loc.size)
11384 struct dwarf2_loclist_baton *baton;
11386 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11387 sizeof (struct dwarf2_loclist_baton));
11388 baton->per_cu = cu->per_cu;
11389 gdb_assert (baton->per_cu);
11391 /* We don't know how long the location list is, but make sure we
11392 don't run off the edge of the section. */
11393 baton->size = dwarf2_per_objfile->loc.size - DW_UNSND (attr);
11394 baton->data = dwarf2_per_objfile->loc.buffer + DW_UNSND (attr);
11395 baton->base_address = cu->base_address;
11396 if (cu->base_known == 0)
11397 complaint (&symfile_complaints,
11398 _("Location list used without specifying the CU base address."));
11400 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs;
11401 SYMBOL_LOCATION_BATON (sym) = baton;
11405 struct dwarf2_locexpr_baton *baton;
11407 baton = obstack_alloc (&cu->objfile->objfile_obstack,
11408 sizeof (struct dwarf2_locexpr_baton));
11409 baton->per_cu = cu->per_cu;
11410 gdb_assert (baton->per_cu);
11412 if (attr_form_is_block (attr))
11414 /* Note that we're just copying the block's data pointer
11415 here, not the actual data. We're still pointing into the
11416 info_buffer for SYM's objfile; right now we never release
11417 that buffer, but when we do clean up properly this may
11419 baton->size = DW_BLOCK (attr)->size;
11420 baton->data = DW_BLOCK (attr)->data;
11424 dwarf2_invalid_attrib_class_complaint ("location description",
11425 SYMBOL_NATURAL_NAME (sym));
11427 baton->data = NULL;
11430 SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs;
11431 SYMBOL_LOCATION_BATON (sym) = baton;
11435 /* Return the OBJFILE associated with the compilation unit CU. */
11438 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu)
11440 struct objfile *objfile = per_cu->psymtab->objfile;
11442 /* Return the master objfile, so that we can report and look up the
11443 correct file containing this variable. */
11444 if (objfile->separate_debug_objfile_backlink)
11445 objfile = objfile->separate_debug_objfile_backlink;
11450 /* Return the address size given in the compilation unit header for CU. */
11453 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu)
11456 return per_cu->cu->header.addr_size;
11459 /* If the CU is not currently read in, we re-read its header. */
11460 struct objfile *objfile = per_cu->psymtab->objfile;
11461 struct dwarf2_per_objfile *per_objfile
11462 = objfile_data (objfile, dwarf2_objfile_data_key);
11463 gdb_byte *info_ptr = per_objfile->info.buffer + per_cu->offset;
11465 struct comp_unit_head cu_header;
11466 memset (&cu_header, 0, sizeof cu_header);
11467 read_comp_unit_head (&cu_header, info_ptr, objfile->obfd);
11468 return cu_header.addr_size;
11472 /* Locate the .debug_info compilation unit from CU's objfile which contains
11473 the DIE at OFFSET. Raises an error on failure. */
11475 static struct dwarf2_per_cu_data *
11476 dwarf2_find_containing_comp_unit (unsigned int offset,
11477 struct objfile *objfile)
11479 struct dwarf2_per_cu_data *this_cu;
11483 high = dwarf2_per_objfile->n_comp_units - 1;
11486 int mid = low + (high - low) / 2;
11487 if (dwarf2_per_objfile->all_comp_units[mid]->offset >= offset)
11492 gdb_assert (low == high);
11493 if (dwarf2_per_objfile->all_comp_units[low]->offset > offset)
11496 error (_("Dwarf Error: could not find partial DIE containing "
11497 "offset 0x%lx [in module %s]"),
11498 (long) offset, bfd_get_filename (objfile->obfd));
11500 gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset <= offset);
11501 return dwarf2_per_objfile->all_comp_units[low-1];
11505 this_cu = dwarf2_per_objfile->all_comp_units[low];
11506 if (low == dwarf2_per_objfile->n_comp_units - 1
11507 && offset >= this_cu->offset + this_cu->length)
11508 error (_("invalid dwarf2 offset %u"), offset);
11509 gdb_assert (offset < this_cu->offset + this_cu->length);
11514 /* Locate the compilation unit from OBJFILE which is located at exactly
11515 OFFSET. Raises an error on failure. */
11517 static struct dwarf2_per_cu_data *
11518 dwarf2_find_comp_unit (unsigned int offset, struct objfile *objfile)
11520 struct dwarf2_per_cu_data *this_cu;
11521 this_cu = dwarf2_find_containing_comp_unit (offset, objfile);
11522 if (this_cu->offset != offset)
11523 error (_("no compilation unit with offset %u."), offset);
11527 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11529 static struct dwarf2_cu *
11530 alloc_one_comp_unit (struct objfile *objfile)
11532 struct dwarf2_cu *cu = xcalloc (1, sizeof (struct dwarf2_cu));
11533 cu->objfile = objfile;
11534 obstack_init (&cu->comp_unit_obstack);
11538 /* Release one cached compilation unit, CU. We unlink it from the tree
11539 of compilation units, but we don't remove it from the read_in_chain;
11540 the caller is responsible for that.
11541 NOTE: DATA is a void * because this function is also used as a
11542 cleanup routine. */
11545 free_one_comp_unit (void *data)
11547 struct dwarf2_cu *cu = data;
11549 if (cu->per_cu != NULL)
11550 cu->per_cu->cu = NULL;
11553 obstack_free (&cu->comp_unit_obstack, NULL);
11558 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11559 when we're finished with it. We can't free the pointer itself, but be
11560 sure to unlink it from the cache. Also release any associated storage
11561 and perform cache maintenance.
11563 Only used during partial symbol parsing. */
11566 free_stack_comp_unit (void *data)
11568 struct dwarf2_cu *cu = data;
11570 obstack_free (&cu->comp_unit_obstack, NULL);
11571 cu->partial_dies = NULL;
11573 if (cu->per_cu != NULL)
11575 /* This compilation unit is on the stack in our caller, so we
11576 should not xfree it. Just unlink it. */
11577 cu->per_cu->cu = NULL;
11580 /* If we had a per-cu pointer, then we may have other compilation
11581 units loaded, so age them now. */
11582 age_cached_comp_units ();
11586 /* Free all cached compilation units. */
11589 free_cached_comp_units (void *data)
11591 struct dwarf2_per_cu_data *per_cu, **last_chain;
11593 per_cu = dwarf2_per_objfile->read_in_chain;
11594 last_chain = &dwarf2_per_objfile->read_in_chain;
11595 while (per_cu != NULL)
11597 struct dwarf2_per_cu_data *next_cu;
11599 next_cu = per_cu->cu->read_in_chain;
11601 free_one_comp_unit (per_cu->cu);
11602 *last_chain = next_cu;
11608 /* Increase the age counter on each cached compilation unit, and free
11609 any that are too old. */
11612 age_cached_comp_units (void)
11614 struct dwarf2_per_cu_data *per_cu, **last_chain;
11616 dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain);
11617 per_cu = dwarf2_per_objfile->read_in_chain;
11618 while (per_cu != NULL)
11620 per_cu->cu->last_used ++;
11621 if (per_cu->cu->last_used <= dwarf2_max_cache_age)
11622 dwarf2_mark (per_cu->cu);
11623 per_cu = per_cu->cu->read_in_chain;
11626 per_cu = dwarf2_per_objfile->read_in_chain;
11627 last_chain = &dwarf2_per_objfile->read_in_chain;
11628 while (per_cu != NULL)
11630 struct dwarf2_per_cu_data *next_cu;
11632 next_cu = per_cu->cu->read_in_chain;
11634 if (!per_cu->cu->mark)
11636 free_one_comp_unit (per_cu->cu);
11637 *last_chain = next_cu;
11640 last_chain = &per_cu->cu->read_in_chain;
11646 /* Remove a single compilation unit from the cache. */
11649 free_one_cached_comp_unit (void *target_cu)
11651 struct dwarf2_per_cu_data *per_cu, **last_chain;
11653 per_cu = dwarf2_per_objfile->read_in_chain;
11654 last_chain = &dwarf2_per_objfile->read_in_chain;
11655 while (per_cu != NULL)
11657 struct dwarf2_per_cu_data *next_cu;
11659 next_cu = per_cu->cu->read_in_chain;
11661 if (per_cu->cu == target_cu)
11663 free_one_comp_unit (per_cu->cu);
11664 *last_chain = next_cu;
11668 last_chain = &per_cu->cu->read_in_chain;
11674 /* Release all extra memory associated with OBJFILE. */
11677 dwarf2_free_objfile (struct objfile *objfile)
11679 dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key);
11681 if (dwarf2_per_objfile == NULL)
11684 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11685 free_cached_comp_units (NULL);
11687 /* Everything else should be on the objfile obstack. */
11690 /* A pair of DIE offset and GDB type pointer. We store these
11691 in a hash table separate from the DIEs, and preserve them
11692 when the DIEs are flushed out of cache. */
11694 struct dwarf2_offset_and_type
11696 unsigned int offset;
11700 /* Hash function for a dwarf2_offset_and_type. */
11703 offset_and_type_hash (const void *item)
11705 const struct dwarf2_offset_and_type *ofs = item;
11706 return ofs->offset;
11709 /* Equality function for a dwarf2_offset_and_type. */
11712 offset_and_type_eq (const void *item_lhs, const void *item_rhs)
11714 const struct dwarf2_offset_and_type *ofs_lhs = item_lhs;
11715 const struct dwarf2_offset_and_type *ofs_rhs = item_rhs;
11716 return ofs_lhs->offset == ofs_rhs->offset;
11719 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11720 table if necessary. For convenience, return TYPE. */
11722 static struct type *
11723 set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
11725 struct dwarf2_offset_and_type **slot, ofs;
11727 if (cu->type_hash == NULL)
11729 gdb_assert (cu->per_cu != NULL);
11730 cu->per_cu->type_hash
11731 = htab_create_alloc_ex (cu->header.length / 24,
11732 offset_and_type_hash,
11733 offset_and_type_eq,
11735 &cu->objfile->objfile_obstack,
11736 hashtab_obstack_allocate,
11737 dummy_obstack_deallocate);
11738 cu->type_hash = cu->per_cu->type_hash;
11741 ofs.offset = die->offset;
11743 slot = (struct dwarf2_offset_and_type **)
11744 htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
11745 *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
11750 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11751 not have a saved type. */
11753 static struct type *
11754 get_die_type (struct die_info *die, struct dwarf2_cu *cu)
11756 struct dwarf2_offset_and_type *slot, ofs;
11757 htab_t type_hash = cu->type_hash;
11759 if (type_hash == NULL)
11762 ofs.offset = die->offset;
11763 slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
11770 /* Add a dependence relationship from CU to REF_PER_CU. */
11773 dwarf2_add_dependence (struct dwarf2_cu *cu,
11774 struct dwarf2_per_cu_data *ref_per_cu)
11778 if (cu->dependencies == NULL)
11780 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
11781 NULL, &cu->comp_unit_obstack,
11782 hashtab_obstack_allocate,
11783 dummy_obstack_deallocate);
11785 slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT);
11787 *slot = ref_per_cu;
11790 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11791 Set the mark field in every compilation unit in the
11792 cache that we must keep because we are keeping CU. */
11795 dwarf2_mark_helper (void **slot, void *data)
11797 struct dwarf2_per_cu_data *per_cu;
11799 per_cu = (struct dwarf2_per_cu_data *) *slot;
11800 if (per_cu->cu->mark)
11802 per_cu->cu->mark = 1;
11804 if (per_cu->cu->dependencies != NULL)
11805 htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL);
11810 /* Set the mark field in CU and in every other compilation unit in the
11811 cache that we must keep because we are keeping CU. */
11814 dwarf2_mark (struct dwarf2_cu *cu)
11819 if (cu->dependencies != NULL)
11820 htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL);
11824 dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu)
11828 per_cu->cu->mark = 0;
11829 per_cu = per_cu->cu->read_in_chain;
11833 /* Trivial hash function for partial_die_info: the hash value of a DIE
11834 is its offset in .debug_info for this objfile. */
11837 partial_die_hash (const void *item)
11839 const struct partial_die_info *part_die = item;
11840 return part_die->offset;
11843 /* Trivial comparison function for partial_die_info structures: two DIEs
11844 are equal if they have the same offset. */
11847 partial_die_eq (const void *item_lhs, const void *item_rhs)
11849 const struct partial_die_info *part_die_lhs = item_lhs;
11850 const struct partial_die_info *part_die_rhs = item_rhs;
11851 return part_die_lhs->offset == part_die_rhs->offset;
11854 static struct cmd_list_element *set_dwarf2_cmdlist;
11855 static struct cmd_list_element *show_dwarf2_cmdlist;
11858 set_dwarf2_cmd (char *args, int from_tty)
11860 help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout);
11864 show_dwarf2_cmd (char *args, int from_tty)
11866 cmd_show_list (show_dwarf2_cmdlist, from_tty, "");
11869 /* If section described by INFO was mmapped, munmap it now. */
11872 munmap_section_buffer (struct dwarf2_section_info *info)
11874 if (info->was_mmapped)
11877 intptr_t begin = (intptr_t) info->buffer;
11878 intptr_t map_begin = begin & ~(pagesize - 1);
11879 size_t map_length = info->size + begin - map_begin;
11880 gdb_assert (munmap ((void *) map_begin, map_length) == 0);
11882 /* Without HAVE_MMAP, we should never be here to begin with. */
11888 /* munmap debug sections for OBJFILE, if necessary. */
11891 dwarf2_per_objfile_free (struct objfile *objfile, void *d)
11893 struct dwarf2_per_objfile *data = d;
11894 munmap_section_buffer (&data->info);
11895 munmap_section_buffer (&data->abbrev);
11896 munmap_section_buffer (&data->line);
11897 munmap_section_buffer (&data->str);
11898 munmap_section_buffer (&data->macinfo);
11899 munmap_section_buffer (&data->ranges);
11900 munmap_section_buffer (&data->loc);
11901 munmap_section_buffer (&data->frame);
11902 munmap_section_buffer (&data->eh_frame);
11905 void _initialize_dwarf2_read (void);
11908 _initialize_dwarf2_read (void)
11910 dwarf2_objfile_data_key
11911 = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free);
11913 add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\
11914 Set DWARF 2 specific variables.\n\
11915 Configure DWARF 2 variables such as the cache size"),
11916 &set_dwarf2_cmdlist, "maintenance set dwarf2 ",
11917 0/*allow-unknown*/, &maintenance_set_cmdlist);
11919 add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\
11920 Show DWARF 2 specific variables\n\
11921 Show DWARF 2 variables such as the cache size"),
11922 &show_dwarf2_cmdlist, "maintenance show dwarf2 ",
11923 0/*allow-unknown*/, &maintenance_show_cmdlist);
11925 add_setshow_zinteger_cmd ("max-cache-age", class_obscure,
11926 &dwarf2_max_cache_age, _("\
11927 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11928 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11929 A higher limit means that cached compilation units will be stored\n\
11930 in memory longer, and more total memory will be used. Zero disables\n\
11931 caching, which can slow down startup."),
11933 show_dwarf2_max_cache_age,
11934 &set_dwarf2_cmdlist,
11935 &show_dwarf2_cmdlist);
11937 add_setshow_zinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\
11938 Set debugging of the dwarf2 DIE reader."), _("\
11939 Show debugging of the dwarf2 DIE reader."), _("\
11940 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11941 The value is the maximum depth to print."),
11944 &setdebuglist, &showdebuglist);