1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used with many systems that use
22 the a.out object file format, as well as some systems that use
23 COFF or ELF where the stabs data is placed in a special section.
24 Avoid placing any object file format specific code in this file. */
28 #include "gdb_obstack.h"
31 #include "expression.h"
34 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
36 #include "aout/aout64.h"
37 #include "gdb-stabs.h"
39 #include "complaints.h"
41 #include "gdb-demangle.h"
45 #include "cp-support.h"
48 /* Ask stabsread.h to define the vars it normally declares `extern'. */
51 #include "stabsread.h" /* Our own declarations */
54 extern void _initialize_stabsread (void);
58 struct nextfield *next;
60 /* This is the raw visibility from the stab. It is not checked
61 for being one of the visibilities we recognize, so code which
62 examines this field better be able to deal. */
68 struct next_fnfieldlist
70 struct next_fnfieldlist *next;
71 struct fn_fieldlist fn_fieldlist;
74 /* The routines that read and process a complete stabs for a C struct or
75 C++ class pass lists of data member fields and lists of member function
76 fields in an instance of a field_info structure, as defined below.
77 This is part of some reorganization of low level C++ support and is
78 expected to eventually go away... (FIXME) */
82 struct nextfield *list;
83 struct next_fnfieldlist *fnlist;
87 read_one_struct_field (struct field_info *, char **, char *,
88 struct type *, struct objfile *);
90 static struct type *dbx_alloc_type (int[2], struct objfile *);
92 static long read_huge_number (char **, int, int *, int);
94 static struct type *error_type (char **, struct objfile *);
97 patch_block_stabs (struct pending *, struct pending_stabs *,
100 static void fix_common_block (struct symbol *, CORE_ADDR);
102 static int read_type_number (char **, int *);
104 static struct type *read_type (char **, struct objfile *);
106 static struct type *read_range_type (char **, int[2], int, struct objfile *);
108 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
110 static struct type *read_sun_floating_type (char **, int[2],
113 static struct type *read_enum_type (char **, struct type *, struct objfile *);
115 static struct type *rs6000_builtin_type (int, struct objfile *);
118 read_member_functions (struct field_info *, char **, struct type *,
122 read_struct_fields (struct field_info *, char **, struct type *,
126 read_baseclasses (struct field_info *, char **, struct type *,
130 read_tilde_fields (struct field_info *, char **, struct type *,
133 static int attach_fn_fields_to_type (struct field_info *, struct type *);
135 static int attach_fields_to_type (struct field_info *, struct type *,
138 static struct type *read_struct_type (char **, struct type *,
142 static struct type *read_array_type (char **, struct type *,
145 static struct field *read_args (char **, int, struct objfile *, int *, int *);
147 static void add_undefined_type (struct type *, int[2]);
150 read_cpp_abbrev (struct field_info *, char **, struct type *,
153 static char *find_name_end (char *name);
155 static int process_reference (char **string);
157 void stabsread_clear_cache (void);
159 static const char vptr_name[] = "_vptr$";
160 static const char vb_name[] = "_vb$";
163 invalid_cpp_abbrev_complaint (const char *arg1)
165 complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
169 reg_value_complaint (int regnum, int num_regs, const char *sym)
171 complaint (&symfile_complaints,
172 _("bad register number %d (max %d) in symbol %s"),
173 regnum, num_regs - 1, sym);
177 stabs_general_complaint (const char *arg1)
179 complaint (&symfile_complaints, "%s", arg1);
182 /* Make a list of forward references which haven't been defined. */
184 static struct type **undef_types;
185 static int undef_types_allocated;
186 static int undef_types_length;
187 static struct symbol *current_symbol = NULL;
189 /* Make a list of nameless types that are undefined.
190 This happens when another type is referenced by its number
191 before this type is actually defined. For instance "t(0,1)=k(0,2)"
192 and type (0,2) is defined only later. */
199 static struct nat *noname_undefs;
200 static int noname_undefs_allocated;
201 static int noname_undefs_length;
203 /* Check for and handle cretinous stabs symbol name continuation! */
204 #define STABS_CONTINUE(pp,objfile) \
206 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
207 *(pp) = next_symbol_text (objfile); \
210 /* Vector of types defined so far, indexed by their type numbers.
211 (In newer sun systems, dbx uses a pair of numbers in parens,
212 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
213 Then these numbers must be translated through the type_translations
214 hash table to get the index into the type vector.) */
216 static struct type **type_vector;
218 /* Number of elements allocated for type_vector currently. */
220 static int type_vector_length;
222 /* Initial size of type vector. Is realloc'd larger if needed, and
223 realloc'd down to the size actually used, when completed. */
225 #define INITIAL_TYPE_VECTOR_LENGTH 160
228 /* Look up a dbx type-number pair. Return the address of the slot
229 where the type for that number-pair is stored.
230 The number-pair is in TYPENUMS.
232 This can be used for finding the type associated with that pair
233 or for associating a new type with the pair. */
235 static struct type **
236 dbx_lookup_type (int typenums[2], struct objfile *objfile)
238 int filenum = typenums[0];
239 int index = typenums[1];
242 struct header_file *f;
245 if (filenum == -1) /* -1,-1 is for temporary types. */
248 if (filenum < 0 || filenum >= n_this_object_header_files)
250 complaint (&symfile_complaints,
251 _("Invalid symbol data: type number "
252 "(%d,%d) out of range at symtab pos %d."),
253 filenum, index, symnum);
261 /* Caller wants address of address of type. We think
262 that negative (rs6k builtin) types will never appear as
263 "lvalues", (nor should they), so we stuff the real type
264 pointer into a temp, and return its address. If referenced,
265 this will do the right thing. */
266 static struct type *temp_type;
268 temp_type = rs6000_builtin_type (index, objfile);
272 /* Type is defined outside of header files.
273 Find it in this object file's type vector. */
274 if (index >= type_vector_length)
276 old_len = type_vector_length;
279 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
280 type_vector = XNEWVEC (struct type *, type_vector_length);
282 while (index >= type_vector_length)
284 type_vector_length *= 2;
286 type_vector = (struct type **)
287 xrealloc ((char *) type_vector,
288 (type_vector_length * sizeof (struct type *)));
289 memset (&type_vector[old_len], 0,
290 (type_vector_length - old_len) * sizeof (struct type *));
292 return (&type_vector[index]);
296 real_filenum = this_object_header_files[filenum];
298 if (real_filenum >= N_HEADER_FILES (objfile))
300 static struct type *temp_type;
302 warning (_("GDB internal error: bad real_filenum"));
305 temp_type = objfile_type (objfile)->builtin_error;
309 f = HEADER_FILES (objfile) + real_filenum;
311 f_orig_length = f->length;
312 if (index >= f_orig_length)
314 while (index >= f->length)
318 f->vector = (struct type **)
319 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
320 memset (&f->vector[f_orig_length], 0,
321 (f->length - f_orig_length) * sizeof (struct type *));
323 return (&f->vector[index]);
327 /* Make sure there is a type allocated for type numbers TYPENUMS
328 and return the type object.
329 This can create an empty (zeroed) type object.
330 TYPENUMS may be (-1, -1) to return a new type object that is not
331 put into the type vector, and so may not be referred to by number. */
334 dbx_alloc_type (int typenums[2], struct objfile *objfile)
336 struct type **type_addr;
338 if (typenums[0] == -1)
340 return (alloc_type (objfile));
343 type_addr = dbx_lookup_type (typenums, objfile);
345 /* If we are referring to a type not known at all yet,
346 allocate an empty type for it.
347 We will fill it in later if we find out how. */
350 *type_addr = alloc_type (objfile);
356 /* Allocate a floating-point type of size BITS. */
359 dbx_init_float_type (struct objfile *objfile, int bits)
361 struct gdbarch *gdbarch = get_objfile_arch (objfile);
362 const struct floatformat **format;
365 format = gdbarch_floatformat_for_type (gdbarch, NULL, bits);
367 type = init_float_type (objfile, bits, NULL, format);
369 type = init_type (objfile, TYPE_CODE_ERROR, bits / TARGET_CHAR_BIT, NULL);
374 /* for all the stabs in a given stab vector, build appropriate types
375 and fix their symbols in given symbol vector. */
378 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
379 struct objfile *objfile)
388 /* for all the stab entries, find their corresponding symbols and
389 patch their types! */
391 for (ii = 0; ii < stabs->count; ++ii)
393 name = stabs->stab[ii];
394 pp = (char *) strchr (name, ':');
395 gdb_assert (pp); /* Must find a ':' or game's over. */
399 pp = (char *) strchr (pp, ':');
401 sym = find_symbol_in_list (symbols, name, pp - name);
404 /* FIXME-maybe: it would be nice if we noticed whether
405 the variable was defined *anywhere*, not just whether
406 it is defined in this compilation unit. But neither
407 xlc or GCC seem to need such a definition, and until
408 we do psymtabs (so that the minimal symbols from all
409 compilation units are available now), I'm not sure
410 how to get the information. */
412 /* On xcoff, if a global is defined and never referenced,
413 ld will remove it from the executable. There is then
414 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
415 sym = allocate_symbol (objfile);
416 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
417 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
418 SYMBOL_SET_LINKAGE_NAME
419 (sym, (char *) obstack_copy0 (&objfile->objfile_obstack,
422 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
424 /* I don't think the linker does this with functions,
425 so as far as I know this is never executed.
426 But it doesn't hurt to check. */
428 lookup_function_type (read_type (&pp, objfile));
432 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
434 add_symbol_to_list (sym, &global_symbols);
439 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
442 lookup_function_type (read_type (&pp, objfile));
446 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
454 /* Read a number by which a type is referred to in dbx data,
455 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
456 Just a single number N is equivalent to (0,N).
457 Return the two numbers by storing them in the vector TYPENUMS.
458 TYPENUMS will then be used as an argument to dbx_lookup_type.
460 Returns 0 for success, -1 for error. */
463 read_type_number (char **pp, int *typenums)
470 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
473 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
480 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
488 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
489 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
490 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
491 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
493 /* Structure for storing pointers to reference definitions for fast lookup
494 during "process_later". */
503 #define MAX_CHUNK_REFS 100
504 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
505 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
507 static struct ref_map *ref_map;
509 /* Ptr to free cell in chunk's linked list. */
510 static int ref_count = 0;
512 /* Number of chunks malloced. */
513 static int ref_chunk = 0;
515 /* This file maintains a cache of stabs aliases found in the symbol
516 table. If the symbol table changes, this cache must be cleared
517 or we are left holding onto data in invalid obstacks. */
519 stabsread_clear_cache (void)
525 /* Create array of pointers mapping refids to symbols and stab strings.
526 Add pointers to reference definition symbols and/or their values as we
527 find them, using their reference numbers as our index.
528 These will be used later when we resolve references. */
530 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
534 if (refnum >= ref_count)
535 ref_count = refnum + 1;
536 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
538 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
539 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
541 ref_map = (struct ref_map *)
542 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
543 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
544 new_chunks * REF_CHUNK_SIZE);
545 ref_chunk += new_chunks;
547 ref_map[refnum].stabs = stabs;
548 ref_map[refnum].sym = sym;
549 ref_map[refnum].value = value;
552 /* Return defined sym for the reference REFNUM. */
554 ref_search (int refnum)
556 if (refnum < 0 || refnum > ref_count)
558 return ref_map[refnum].sym;
561 /* Parse a reference id in STRING and return the resulting
562 reference number. Move STRING beyond the reference id. */
565 process_reference (char **string)
573 /* Advance beyond the initial '#'. */
576 /* Read number as reference id. */
577 while (*p && isdigit (*p))
579 refnum = refnum * 10 + *p - '0';
586 /* If STRING defines a reference, store away a pointer to the reference
587 definition for later use. Return the reference number. */
590 symbol_reference_defined (char **string)
595 refnum = process_reference (&p);
597 /* Defining symbols end in '='. */
600 /* Symbol is being defined here. */
606 /* Must be a reference. Either the symbol has already been defined,
607 or this is a forward reference to it. */
614 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
616 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
619 || regno >= (gdbarch_num_regs (gdbarch)
620 + gdbarch_num_pseudo_regs (gdbarch)))
622 reg_value_complaint (regno,
623 gdbarch_num_regs (gdbarch)
624 + gdbarch_num_pseudo_regs (gdbarch),
625 SYMBOL_PRINT_NAME (sym));
627 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless. */
633 static const struct symbol_register_ops stab_register_funcs = {
637 /* The "aclass" indices for computed symbols. */
639 static int stab_register_index;
640 static int stab_regparm_index;
643 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
644 struct objfile *objfile)
646 struct gdbarch *gdbarch = get_objfile_arch (objfile);
648 char *p = (char *) find_name_end (string);
653 /* We would like to eliminate nameless symbols, but keep their types.
654 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
655 to type 2, but, should not create a symbol to address that type. Since
656 the symbol will be nameless, there is no way any user can refer to it. */
660 /* Ignore syms with empty names. */
664 /* Ignore old-style symbols from cc -go. */
674 complaint (&symfile_complaints,
675 _("Bad stabs string '%s'"), string);
680 /* If a nameless stab entry, all we need is the type, not the symbol.
681 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
682 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
684 current_symbol = sym = allocate_symbol (objfile);
686 if (processing_gcc_compilation)
688 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
689 number of bytes occupied by a type or object, which we ignore. */
690 SYMBOL_LINE (sym) = desc;
694 SYMBOL_LINE (sym) = 0; /* unknown */
697 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
698 &objfile->objfile_obstack);
700 if (is_cplus_marker (string[0]))
702 /* Special GNU C++ names. */
706 SYMBOL_SET_LINKAGE_NAME (sym, "this");
709 case 'v': /* $vtbl_ptr_type */
713 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
717 /* This was an anonymous type that was never fixed up. */
721 /* SunPRO (3.0 at least) static variable encoding. */
722 if (gdbarch_static_transform_name_p (gdbarch))
724 /* ... fall through ... */
727 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
729 goto normal; /* Do *something* with it. */
735 std::string new_name;
737 if (SYMBOL_LANGUAGE (sym) == language_cplus)
739 char *name = (char *) alloca (p - string + 1);
741 memcpy (name, string, p - string);
742 name[p - string] = '\0';
743 new_name = cp_canonicalize_string (name);
745 if (!new_name.empty ())
747 SYMBOL_SET_NAMES (sym,
748 new_name.c_str (), new_name.length (),
752 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
754 if (SYMBOL_LANGUAGE (sym) == language_cplus)
755 cp_scan_for_anonymous_namespaces (sym, objfile);
760 /* Determine the type of name being defined. */
762 /* Getting GDB to correctly skip the symbol on an undefined symbol
763 descriptor and not ever dump core is a very dodgy proposition if
764 we do things this way. I say the acorn RISC machine can just
765 fix their compiler. */
766 /* The Acorn RISC machine's compiler can put out locals that don't
767 start with "234=" or "(3,4)=", so assume anything other than the
768 deftypes we know how to handle is a local. */
769 if (!strchr ("cfFGpPrStTvVXCR", *p))
771 if (isdigit (*p) || *p == '(' || *p == '-')
780 /* c is a special case, not followed by a type-number.
781 SYMBOL:c=iVALUE for an integer constant symbol.
782 SYMBOL:c=rVALUE for a floating constant symbol.
783 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
784 e.g. "b:c=e6,0" for "const b = blob1"
785 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
788 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
789 SYMBOL_TYPE (sym) = error_type (&p, objfile);
790 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
791 add_symbol_to_list (sym, &file_symbols);
801 struct type *dbl_type;
803 /* FIXME-if-picky-about-floating-accuracy: Should be using
804 target arithmetic to get the value. real.c in GCC
805 probably has the necessary code. */
807 dbl_type = objfile_type (objfile)->builtin_double;
809 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack,
810 TYPE_LENGTH (dbl_type));
811 store_typed_floating (dbl_valu, dbl_type, d);
813 SYMBOL_TYPE (sym) = dbl_type;
814 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
815 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
820 /* Defining integer constants this way is kind of silly,
821 since 'e' constants allows the compiler to give not
822 only the value, but the type as well. C has at least
823 int, long, unsigned int, and long long as constant
824 types; other languages probably should have at least
825 unsigned as well as signed constants. */
827 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
828 SYMBOL_VALUE (sym) = atoi (p);
829 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
835 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
836 SYMBOL_VALUE (sym) = atoi (p);
837 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
843 struct type *range_type;
846 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
847 gdb_byte *string_value;
849 if (quote != '\'' && quote != '"')
851 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
852 SYMBOL_TYPE (sym) = error_type (&p, objfile);
853 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
854 add_symbol_to_list (sym, &file_symbols);
858 /* Find matching quote, rejecting escaped quotes. */
859 while (*p && *p != quote)
861 if (*p == '\\' && p[1] == quote)
863 string_local[ind] = (gdb_byte) quote;
869 string_local[ind] = (gdb_byte) (*p);
876 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
877 SYMBOL_TYPE (sym) = error_type (&p, objfile);
878 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
879 add_symbol_to_list (sym, &file_symbols);
883 /* NULL terminate the string. */
884 string_local[ind] = 0;
886 = create_static_range_type (NULL,
887 objfile_type (objfile)->builtin_int,
889 SYMBOL_TYPE (sym) = create_array_type (NULL,
890 objfile_type (objfile)->builtin_char,
893 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, ind + 1);
894 memcpy (string_value, string_local, ind + 1);
897 SYMBOL_VALUE_BYTES (sym) = string_value;
898 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
903 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
904 can be represented as integral.
905 e.g. "b:c=e6,0" for "const b = blob1"
906 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
908 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
909 SYMBOL_TYPE (sym) = read_type (&p, objfile);
913 SYMBOL_TYPE (sym) = error_type (&p, objfile);
918 /* If the value is too big to fit in an int (perhaps because
919 it is unsigned), or something like that, we silently get
920 a bogus value. The type and everything else about it is
921 correct. Ideally, we should be using whatever we have
922 available for parsing unsigned and long long values,
924 SYMBOL_VALUE (sym) = atoi (p);
929 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
930 SYMBOL_TYPE (sym) = error_type (&p, objfile);
933 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
934 add_symbol_to_list (sym, &file_symbols);
938 /* The name of a caught exception. */
939 SYMBOL_TYPE (sym) = read_type (&p, objfile);
940 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
941 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
942 SYMBOL_VALUE_ADDRESS (sym) = valu;
943 add_symbol_to_list (sym, &local_symbols);
947 /* A static function definition. */
948 SYMBOL_TYPE (sym) = read_type (&p, objfile);
949 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
950 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
951 add_symbol_to_list (sym, &file_symbols);
952 /* fall into process_function_types. */
954 process_function_types:
955 /* Function result types are described as the result type in stabs.
956 We need to convert this to the function-returning-type-X type
957 in GDB. E.g. "int" is converted to "function returning int". */
958 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
959 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
961 /* All functions in C++ have prototypes. Stabs does not offer an
962 explicit way to identify prototyped or unprototyped functions,
963 but both GCC and Sun CC emit stabs for the "call-as" type rather
964 than the "declared-as" type for unprototyped functions, so
965 we treat all functions as if they were prototyped. This is used
966 primarily for promotion when calling the function from GDB. */
967 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
969 /* fall into process_prototype_types. */
971 process_prototype_types:
972 /* Sun acc puts declared types of arguments here. */
975 struct type *ftype = SYMBOL_TYPE (sym);
980 /* Obtain a worst case guess for the number of arguments
981 by counting the semicolons. */
988 /* Allocate parameter information fields and fill them in. */
989 TYPE_FIELDS (ftype) = (struct field *)
990 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
995 /* A type number of zero indicates the start of varargs.
996 FIXME: GDB currently ignores vararg functions. */
997 if (p[0] == '0' && p[1] == '\0')
999 ptype = read_type (&p, objfile);
1001 /* The Sun compilers mark integer arguments, which should
1002 be promoted to the width of the calling conventions, with
1003 a type which references itself. This type is turned into
1004 a TYPE_CODE_VOID type by read_type, and we have to turn
1005 it back into builtin_int here.
1006 FIXME: Do we need a new builtin_promoted_int_arg ? */
1007 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
1008 ptype = objfile_type (objfile)->builtin_int;
1009 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
1010 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
1012 TYPE_NFIELDS (ftype) = nparams;
1013 TYPE_PROTOTYPED (ftype) = 1;
1018 /* A global function definition. */
1019 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1020 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1021 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1022 add_symbol_to_list (sym, &global_symbols);
1023 goto process_function_types;
1026 /* For a class G (global) symbol, it appears that the
1027 value is not correct. It is necessary to search for the
1028 corresponding linker definition to find the value.
1029 These definitions appear at the end of the namelist. */
1030 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1031 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1032 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1033 /* Don't add symbol references to global_sym_chain.
1034 Symbol references don't have valid names and wont't match up with
1035 minimal symbols when the global_sym_chain is relocated.
1036 We'll fixup symbol references when we fixup the defining symbol. */
1037 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1039 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1040 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1041 global_sym_chain[i] = sym;
1043 add_symbol_to_list (sym, &global_symbols);
1046 /* This case is faked by a conditional above,
1047 when there is no code letter in the dbx data.
1048 Dbx data never actually contains 'l'. */
1051 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1052 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1053 SYMBOL_VALUE (sym) = valu;
1054 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1055 add_symbol_to_list (sym, &local_symbols);
1060 /* pF is a two-letter code that means a function parameter in Fortran.
1061 The type-number specifies the type of the return value.
1062 Translate it into a pointer-to-function type. */
1066 = lookup_pointer_type
1067 (lookup_function_type (read_type (&p, objfile)));
1070 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1072 SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
1073 SYMBOL_VALUE (sym) = valu;
1074 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1075 SYMBOL_IS_ARGUMENT (sym) = 1;
1076 add_symbol_to_list (sym, &local_symbols);
1078 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1080 /* On little-endian machines, this crud is never necessary,
1081 and, if the extra bytes contain garbage, is harmful. */
1085 /* If it's gcc-compiled, if it says `short', believe it. */
1086 if (processing_gcc_compilation
1087 || gdbarch_believe_pcc_promotion (gdbarch))
1090 if (!gdbarch_believe_pcc_promotion (gdbarch))
1092 /* If PCC says a parameter is a short or a char, it is
1094 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1095 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1096 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1099 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1100 ? objfile_type (objfile)->builtin_unsigned_int
1101 : objfile_type (objfile)->builtin_int;
1107 /* acc seems to use P to declare the prototypes of functions that
1108 are referenced by this file. gdb is not prepared to deal
1109 with this extra information. FIXME, it ought to. */
1112 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1113 goto process_prototype_types;
1118 /* Parameter which is in a register. */
1119 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1120 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1121 SYMBOL_IS_ARGUMENT (sym) = 1;
1122 SYMBOL_VALUE (sym) = valu;
1123 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1124 add_symbol_to_list (sym, &local_symbols);
1128 /* Register variable (either global or local). */
1129 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1130 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1131 SYMBOL_VALUE (sym) = valu;
1132 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1133 if (within_function)
1135 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1136 the same name to represent an argument passed in a
1137 register. GCC uses 'P' for the same case. So if we find
1138 such a symbol pair we combine it into one 'P' symbol.
1139 For Sun cc we need to do this regardless of
1140 stabs_argument_has_addr, because the compiler puts out
1141 the 'p' symbol even if it never saves the argument onto
1144 On most machines, we want to preserve both symbols, so
1145 that we can still get information about what is going on
1146 with the stack (VAX for computing args_printed, using
1147 stack slots instead of saved registers in backtraces,
1150 Note that this code illegally combines
1151 main(argc) struct foo argc; { register struct foo argc; }
1152 but this case is considered pathological and causes a warning
1153 from a decent compiler. */
1156 && local_symbols->nsyms > 0
1157 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1159 struct symbol *prev_sym;
1161 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1162 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1163 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1164 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1165 SYMBOL_LINKAGE_NAME (sym)) == 0)
1167 SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
1168 /* Use the type from the LOC_REGISTER; that is the type
1169 that is actually in that register. */
1170 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1171 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1176 add_symbol_to_list (sym, &local_symbols);
1179 add_symbol_to_list (sym, &file_symbols);
1183 /* Static symbol at top level of file. */
1184 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1185 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1186 SYMBOL_VALUE_ADDRESS (sym) = valu;
1187 if (gdbarch_static_transform_name_p (gdbarch)
1188 && gdbarch_static_transform_name (gdbarch,
1189 SYMBOL_LINKAGE_NAME (sym))
1190 != SYMBOL_LINKAGE_NAME (sym))
1192 struct bound_minimal_symbol msym;
1194 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1196 if (msym.minsym != NULL)
1198 const char *new_name = gdbarch_static_transform_name
1199 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1201 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1202 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1205 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1206 add_symbol_to_list (sym, &file_symbols);
1210 /* In Ada, there is no distinction between typedef and non-typedef;
1211 any type declaration implicitly has the equivalent of a typedef,
1212 and thus 't' is in fact equivalent to 'Tt'.
1214 Therefore, for Ada units, we check the character immediately
1215 before the 't', and if we do not find a 'T', then make sure to
1216 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1217 will be stored in the VAR_DOMAIN). If the symbol was indeed
1218 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1219 elsewhere, so we don't need to take care of that.
1221 This is important to do, because of forward references:
1222 The cleanup of undefined types stored in undef_types only uses
1223 STRUCT_DOMAIN symbols to perform the replacement. */
1224 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1227 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1229 /* For a nameless type, we don't want a create a symbol, thus we
1230 did not use `sym'. Return without further processing. */
1234 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1235 SYMBOL_VALUE (sym) = valu;
1236 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1237 /* C++ vagaries: we may have a type which is derived from
1238 a base type which did not have its name defined when the
1239 derived class was output. We fill in the derived class's
1240 base part member's name here in that case. */
1241 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1242 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1243 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1244 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1248 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1249 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1250 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1251 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1254 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1256 /* gcc-2.6 or later (when using -fvtable-thunks)
1257 emits a unique named type for a vtable entry.
1258 Some gdb code depends on that specific name. */
1259 extern const char vtbl_ptr_name[];
1261 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1262 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1263 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1265 /* If we are giving a name to a type such as "pointer to
1266 foo" or "function returning foo", we better not set
1267 the TYPE_NAME. If the program contains "typedef char
1268 *caddr_t;", we don't want all variables of type char
1269 * to print as caddr_t. This is not just a
1270 consequence of GDB's type management; PCC and GCC (at
1271 least through version 2.4) both output variables of
1272 either type char * or caddr_t with the type number
1273 defined in the 't' symbol for caddr_t. If a future
1274 compiler cleans this up it GDB is not ready for it
1275 yet, but if it becomes ready we somehow need to
1276 disable this check (without breaking the PCC/GCC2.4
1281 Fortunately, this check seems not to be necessary
1282 for anything except pointers or functions. */
1283 /* ezannoni: 2000-10-26. This seems to apply for
1284 versions of gcc older than 2.8. This was the original
1285 problem: with the following code gdb would tell that
1286 the type for name1 is caddr_t, and func is char().
1288 typedef char *caddr_t;
1300 /* Pascal accepts names for pointer types. */
1301 if (current_subfile->language == language_pascal)
1303 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1307 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1310 add_symbol_to_list (sym, &file_symbols);
1314 /* Create the STRUCT_DOMAIN clone. */
1315 struct symbol *struct_sym = allocate_symbol (objfile);
1318 SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
1319 SYMBOL_VALUE (struct_sym) = valu;
1320 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1321 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1322 TYPE_NAME (SYMBOL_TYPE (sym))
1323 = obconcat (&objfile->objfile_obstack,
1324 SYMBOL_LINKAGE_NAME (sym),
1326 add_symbol_to_list (struct_sym, &file_symbols);
1332 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1333 by 't' which means we are typedef'ing it as well. */
1334 synonym = *p == 't';
1339 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1341 /* For a nameless type, we don't want a create a symbol, thus we
1342 did not use `sym'. Return without further processing. */
1346 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1347 SYMBOL_VALUE (sym) = valu;
1348 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1349 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1350 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1351 = obconcat (&objfile->objfile_obstack,
1352 SYMBOL_LINKAGE_NAME (sym),
1354 add_symbol_to_list (sym, &file_symbols);
1358 /* Clone the sym and then modify it. */
1359 struct symbol *typedef_sym = allocate_symbol (objfile);
1361 *typedef_sym = *sym;
1362 SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
1363 SYMBOL_VALUE (typedef_sym) = valu;
1364 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1365 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1366 TYPE_NAME (SYMBOL_TYPE (sym))
1367 = obconcat (&objfile->objfile_obstack,
1368 SYMBOL_LINKAGE_NAME (sym),
1370 add_symbol_to_list (typedef_sym, &file_symbols);
1375 /* Static symbol of local scope. */
1376 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1377 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1378 SYMBOL_VALUE_ADDRESS (sym) = valu;
1379 if (gdbarch_static_transform_name_p (gdbarch)
1380 && gdbarch_static_transform_name (gdbarch,
1381 SYMBOL_LINKAGE_NAME (sym))
1382 != SYMBOL_LINKAGE_NAME (sym))
1384 struct bound_minimal_symbol msym;
1386 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1388 if (msym.minsym != NULL)
1390 const char *new_name = gdbarch_static_transform_name
1391 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1393 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1394 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1397 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1398 add_symbol_to_list (sym, &local_symbols);
1402 /* Reference parameter */
1403 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1404 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1405 SYMBOL_IS_ARGUMENT (sym) = 1;
1406 SYMBOL_VALUE (sym) = valu;
1407 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1408 add_symbol_to_list (sym, &local_symbols);
1412 /* Reference parameter which is in a register. */
1413 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1414 SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
1415 SYMBOL_IS_ARGUMENT (sym) = 1;
1416 SYMBOL_VALUE (sym) = valu;
1417 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1418 add_symbol_to_list (sym, &local_symbols);
1422 /* This is used by Sun FORTRAN for "function result value".
1423 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1424 that Pascal uses it too, but when I tried it Pascal used
1425 "x:3" (local symbol) instead. */
1426 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1427 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1428 SYMBOL_VALUE (sym) = valu;
1429 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1430 add_symbol_to_list (sym, &local_symbols);
1434 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1435 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
1436 SYMBOL_VALUE (sym) = 0;
1437 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1438 add_symbol_to_list (sym, &file_symbols);
1442 /* Some systems pass variables of certain types by reference instead
1443 of by value, i.e. they will pass the address of a structure (in a
1444 register or on the stack) instead of the structure itself. */
1446 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1447 && SYMBOL_IS_ARGUMENT (sym))
1449 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1450 variables passed in a register). */
1451 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1452 SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
1453 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1454 and subsequent arguments on SPARC, for example). */
1455 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1456 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1462 /* Skip rest of this symbol and return an error type.
1464 General notes on error recovery: error_type always skips to the
1465 end of the symbol (modulo cretinous dbx symbol name continuation).
1466 Thus code like this:
1468 if (*(*pp)++ != ';')
1469 return error_type (pp, objfile);
1471 is wrong because if *pp starts out pointing at '\0' (typically as the
1472 result of an earlier error), it will be incremented to point to the
1473 start of the next symbol, which might produce strange results, at least
1474 if you run off the end of the string table. Instead use
1477 return error_type (pp, objfile);
1483 foo = error_type (pp, objfile);
1487 And in case it isn't obvious, the point of all this hair is so the compiler
1488 can define new types and new syntaxes, and old versions of the
1489 debugger will be able to read the new symbol tables. */
1491 static struct type *
1492 error_type (char **pp, struct objfile *objfile)
1494 complaint (&symfile_complaints,
1495 _("couldn't parse type; debugger out of date?"));
1498 /* Skip to end of symbol. */
1499 while (**pp != '\0')
1504 /* Check for and handle cretinous dbx symbol name continuation! */
1505 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1507 *pp = next_symbol_text (objfile);
1514 return objfile_type (objfile)->builtin_error;
1518 /* Read type information or a type definition; return the type. Even
1519 though this routine accepts either type information or a type
1520 definition, the distinction is relevant--some parts of stabsread.c
1521 assume that type information starts with a digit, '-', or '(' in
1522 deciding whether to call read_type. */
1524 static struct type *
1525 read_type (char **pp, struct objfile *objfile)
1527 struct type *type = 0;
1530 char type_descriptor;
1532 /* Size in bits of type if specified by a type attribute, or -1 if
1533 there is no size attribute. */
1536 /* Used to distinguish string and bitstring from char-array and set. */
1539 /* Used to distinguish vector from array. */
1542 /* Read type number if present. The type number may be omitted.
1543 for instance in a two-dimensional array declared with type
1544 "ar1;1;10;ar1;1;10;4". */
1545 if ((**pp >= '0' && **pp <= '9')
1549 if (read_type_number (pp, typenums) != 0)
1550 return error_type (pp, objfile);
1554 /* Type is not being defined here. Either it already
1555 exists, or this is a forward reference to it.
1556 dbx_alloc_type handles both cases. */
1557 type = dbx_alloc_type (typenums, objfile);
1559 /* If this is a forward reference, arrange to complain if it
1560 doesn't get patched up by the time we're done
1562 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1563 add_undefined_type (type, typenums);
1568 /* Type is being defined here. */
1570 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1575 /* 'typenums=' not present, type is anonymous. Read and return
1576 the definition, but don't put it in the type vector. */
1577 typenums[0] = typenums[1] = -1;
1582 type_descriptor = (*pp)[-1];
1583 switch (type_descriptor)
1587 enum type_code code;
1589 /* Used to index through file_symbols. */
1590 struct pending *ppt;
1593 /* Name including "struct", etc. */
1597 char *from, *to, *p, *q1, *q2;
1599 /* Set the type code according to the following letter. */
1603 code = TYPE_CODE_STRUCT;
1606 code = TYPE_CODE_UNION;
1609 code = TYPE_CODE_ENUM;
1613 /* Complain and keep going, so compilers can invent new
1614 cross-reference types. */
1615 complaint (&symfile_complaints,
1616 _("Unrecognized cross-reference type `%c'"),
1618 code = TYPE_CODE_STRUCT;
1623 q1 = strchr (*pp, '<');
1624 p = strchr (*pp, ':');
1626 return error_type (pp, objfile);
1627 if (q1 && p > q1 && p[1] == ':')
1629 int nesting_level = 0;
1631 for (q2 = q1; *q2; q2++)
1635 else if (*q2 == '>')
1637 else if (*q2 == ':' && nesting_level == 0)
1642 return error_type (pp, objfile);
1645 if (current_subfile->language == language_cplus)
1647 char *name = (char *) alloca (p - *pp + 1);
1649 memcpy (name, *pp, p - *pp);
1650 name[p - *pp] = '\0';
1652 std::string new_name = cp_canonicalize_string (name);
1653 if (!new_name.empty ())
1656 = (char *) obstack_copy0 (&objfile->objfile_obstack,
1658 new_name.length ());
1661 if (type_name == NULL)
1663 to = type_name = (char *)
1664 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1666 /* Copy the name. */
1673 /* Set the pointer ahead of the name which we just read, and
1678 /* If this type has already been declared, then reuse the same
1679 type, rather than allocating a new one. This saves some
1682 for (ppt = file_symbols; ppt; ppt = ppt->next)
1683 for (i = 0; i < ppt->nsyms; i++)
1685 struct symbol *sym = ppt->symbol[i];
1687 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1688 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1689 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1690 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1692 obstack_free (&objfile->objfile_obstack, type_name);
1693 type = SYMBOL_TYPE (sym);
1694 if (typenums[0] != -1)
1695 *dbx_lookup_type (typenums, objfile) = type;
1700 /* Didn't find the type to which this refers, so we must
1701 be dealing with a forward reference. Allocate a type
1702 structure for it, and keep track of it so we can
1703 fill in the rest of the fields when we get the full
1705 type = dbx_alloc_type (typenums, objfile);
1706 TYPE_CODE (type) = code;
1707 TYPE_TAG_NAME (type) = type_name;
1708 INIT_CPLUS_SPECIFIC (type);
1709 TYPE_STUB (type) = 1;
1711 add_undefined_type (type, typenums);
1715 case '-': /* RS/6000 built-in type */
1729 /* We deal with something like t(1,2)=(3,4)=... which
1730 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1732 /* Allocate and enter the typedef type first.
1733 This handles recursive types. */
1734 type = dbx_alloc_type (typenums, objfile);
1735 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1737 struct type *xtype = read_type (pp, objfile);
1741 /* It's being defined as itself. That means it is "void". */
1742 TYPE_CODE (type) = TYPE_CODE_VOID;
1743 TYPE_LENGTH (type) = 1;
1745 else if (type_size >= 0 || is_string)
1747 /* This is the absolute wrong way to construct types. Every
1748 other debug format has found a way around this problem and
1749 the related problems with unnecessarily stubbed types;
1750 someone motivated should attempt to clean up the issue
1751 here as well. Once a type pointed to has been created it
1752 should not be modified.
1754 Well, it's not *absolutely* wrong. Constructing recursive
1755 types (trees, linked lists) necessarily entails modifying
1756 types after creating them. Constructing any loop structure
1757 entails side effects. The Dwarf 2 reader does handle this
1758 more gracefully (it never constructs more than once
1759 instance of a type object, so it doesn't have to copy type
1760 objects wholesale), but it still mutates type objects after
1761 other folks have references to them.
1763 Keep in mind that this circularity/mutation issue shows up
1764 at the source language level, too: C's "incomplete types",
1765 for example. So the proper cleanup, I think, would be to
1766 limit GDB's type smashing to match exactly those required
1767 by the source language. So GDB could have a
1768 "complete_this_type" function, but never create unnecessary
1769 copies of a type otherwise. */
1770 replace_type (type, xtype);
1771 TYPE_NAME (type) = NULL;
1772 TYPE_TAG_NAME (type) = NULL;
1776 TYPE_TARGET_STUB (type) = 1;
1777 TYPE_TARGET_TYPE (type) = xtype;
1782 /* In the following types, we must be sure to overwrite any existing
1783 type that the typenums refer to, rather than allocating a new one
1784 and making the typenums point to the new one. This is because there
1785 may already be pointers to the existing type (if it had been
1786 forward-referenced), and we must change it to a pointer, function,
1787 reference, or whatever, *in-place*. */
1789 case '*': /* Pointer to another type */
1790 type1 = read_type (pp, objfile);
1791 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1794 case '&': /* Reference to another type */
1795 type1 = read_type (pp, objfile);
1796 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
1799 case 'f': /* Function returning another type */
1800 type1 = read_type (pp, objfile);
1801 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1804 case 'g': /* Prototyped function. (Sun) */
1806 /* Unresolved questions:
1808 - According to Sun's ``STABS Interface Manual'', for 'f'
1809 and 'F' symbol descriptors, a `0' in the argument type list
1810 indicates a varargs function. But it doesn't say how 'g'
1811 type descriptors represent that info. Someone with access
1812 to Sun's toolchain should try it out.
1814 - According to the comment in define_symbol (search for
1815 `process_prototype_types:'), Sun emits integer arguments as
1816 types which ref themselves --- like `void' types. Do we
1817 have to deal with that here, too? Again, someone with
1818 access to Sun's toolchain should try it out and let us
1821 const char *type_start = (*pp) - 1;
1822 struct type *return_type = read_type (pp, objfile);
1823 struct type *func_type
1824 = make_function_type (return_type,
1825 dbx_lookup_type (typenums, objfile));
1828 struct type_list *next;
1832 while (**pp && **pp != '#')
1834 struct type *arg_type = read_type (pp, objfile);
1835 struct type_list *newobj = XALLOCA (struct type_list);
1836 newobj->type = arg_type;
1837 newobj->next = arg_types;
1845 complaint (&symfile_complaints,
1846 _("Prototyped function type didn't "
1847 "end arguments with `#':\n%s"),
1851 /* If there is just one argument whose type is `void', then
1852 that's just an empty argument list. */
1854 && ! arg_types->next
1855 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1858 TYPE_FIELDS (func_type)
1859 = (struct field *) TYPE_ALLOC (func_type,
1860 num_args * sizeof (struct field));
1861 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1864 struct type_list *t;
1866 /* We stuck each argument type onto the front of the list
1867 when we read it, so the list is reversed. Build the
1868 fields array right-to-left. */
1869 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1870 TYPE_FIELD_TYPE (func_type, i) = t->type;
1872 TYPE_NFIELDS (func_type) = num_args;
1873 TYPE_PROTOTYPED (func_type) = 1;
1879 case 'k': /* Const qualifier on some type (Sun) */
1880 type = read_type (pp, objfile);
1881 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1882 dbx_lookup_type (typenums, objfile));
1885 case 'B': /* Volatile qual on some type (Sun) */
1886 type = read_type (pp, objfile);
1887 type = make_cv_type (TYPE_CONST (type), 1, type,
1888 dbx_lookup_type (typenums, objfile));
1892 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1893 { /* Member (class & variable) type */
1894 /* FIXME -- we should be doing smash_to_XXX types here. */
1896 struct type *domain = read_type (pp, objfile);
1897 struct type *memtype;
1900 /* Invalid member type data format. */
1901 return error_type (pp, objfile);
1904 memtype = read_type (pp, objfile);
1905 type = dbx_alloc_type (typenums, objfile);
1906 smash_to_memberptr_type (type, domain, memtype);
1909 /* type attribute */
1913 /* Skip to the semicolon. */
1914 while (**pp != ';' && **pp != '\0')
1917 return error_type (pp, objfile);
1919 ++ * pp; /* Skip the semicolon. */
1923 case 's': /* Size attribute */
1924 type_size = atoi (attr + 1);
1929 case 'S': /* String attribute */
1930 /* FIXME: check to see if following type is array? */
1934 case 'V': /* Vector attribute */
1935 /* FIXME: check to see if following type is array? */
1940 /* Ignore unrecognized type attributes, so future compilers
1941 can invent new ones. */
1949 case '#': /* Method (class & fn) type */
1950 if ((*pp)[0] == '#')
1952 /* We'll get the parameter types from the name. */
1953 struct type *return_type;
1956 return_type = read_type (pp, objfile);
1957 if (*(*pp)++ != ';')
1958 complaint (&symfile_complaints,
1959 _("invalid (minimal) member type "
1960 "data format at symtab pos %d."),
1962 type = allocate_stub_method (return_type);
1963 if (typenums[0] != -1)
1964 *dbx_lookup_type (typenums, objfile) = type;
1968 struct type *domain = read_type (pp, objfile);
1969 struct type *return_type;
1974 /* Invalid member type data format. */
1975 return error_type (pp, objfile);
1979 return_type = read_type (pp, objfile);
1980 args = read_args (pp, ';', objfile, &nargs, &varargs);
1982 return error_type (pp, objfile);
1983 type = dbx_alloc_type (typenums, objfile);
1984 smash_to_method_type (type, domain, return_type, args,
1989 case 'r': /* Range type */
1990 type = read_range_type (pp, typenums, type_size, objfile);
1991 if (typenums[0] != -1)
1992 *dbx_lookup_type (typenums, objfile) = type;
1997 /* Sun ACC builtin int type */
1998 type = read_sun_builtin_type (pp, typenums, objfile);
1999 if (typenums[0] != -1)
2000 *dbx_lookup_type (typenums, objfile) = type;
2004 case 'R': /* Sun ACC builtin float type */
2005 type = read_sun_floating_type (pp, typenums, objfile);
2006 if (typenums[0] != -1)
2007 *dbx_lookup_type (typenums, objfile) = type;
2010 case 'e': /* Enumeration type */
2011 type = dbx_alloc_type (typenums, objfile);
2012 type = read_enum_type (pp, type, objfile);
2013 if (typenums[0] != -1)
2014 *dbx_lookup_type (typenums, objfile) = type;
2017 case 's': /* Struct type */
2018 case 'u': /* Union type */
2020 enum type_code type_code = TYPE_CODE_UNDEF;
2021 type = dbx_alloc_type (typenums, objfile);
2022 switch (type_descriptor)
2025 type_code = TYPE_CODE_STRUCT;
2028 type_code = TYPE_CODE_UNION;
2031 type = read_struct_type (pp, type, type_code, objfile);
2035 case 'a': /* Array type */
2037 return error_type (pp, objfile);
2040 type = dbx_alloc_type (typenums, objfile);
2041 type = read_array_type (pp, type, objfile);
2043 TYPE_CODE (type) = TYPE_CODE_STRING;
2045 make_vector_type (type);
2048 case 'S': /* Set type */
2049 type1 = read_type (pp, objfile);
2050 type = create_set_type ((struct type *) NULL, type1);
2051 if (typenums[0] != -1)
2052 *dbx_lookup_type (typenums, objfile) = type;
2056 --*pp; /* Go back to the symbol in error. */
2057 /* Particularly important if it was \0! */
2058 return error_type (pp, objfile);
2063 warning (_("GDB internal error, type is NULL in stabsread.c."));
2064 return error_type (pp, objfile);
2067 /* Size specified in a type attribute overrides any other size. */
2068 if (type_size != -1)
2069 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2074 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2075 Return the proper type node for a given builtin type number. */
2077 static const struct objfile_data *rs6000_builtin_type_data;
2079 static struct type *
2080 rs6000_builtin_type (int typenum, struct objfile *objfile)
2082 struct type **negative_types
2083 = (struct type **) objfile_data (objfile, rs6000_builtin_type_data);
2085 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2086 #define NUMBER_RECOGNIZED 34
2087 struct type *rettype = NULL;
2089 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2091 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
2092 return objfile_type (objfile)->builtin_error;
2095 if (!negative_types)
2097 /* This includes an empty slot for type number -0. */
2098 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2099 NUMBER_RECOGNIZED + 1, struct type *);
2100 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2103 if (negative_types[-typenum] != NULL)
2104 return negative_types[-typenum];
2106 #if TARGET_CHAR_BIT != 8
2107 #error This code wrong for TARGET_CHAR_BIT not 8
2108 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2109 that if that ever becomes not true, the correct fix will be to
2110 make the size in the struct type to be in bits, not in units of
2117 /* The size of this and all the other types are fixed, defined
2118 by the debugging format. If there is a type called "int" which
2119 is other than 32 bits, then it should use a new negative type
2120 number (or avoid negative type numbers for that case).
2121 See stabs.texinfo. */
2122 rettype = init_integer_type (objfile, 32, 0, "int");
2125 rettype = init_integer_type (objfile, 8, 0, "char");
2126 TYPE_NOSIGN (rettype) = 1;
2129 rettype = init_integer_type (objfile, 16, 0, "short");
2132 rettype = init_integer_type (objfile, 32, 0, "long");
2135 rettype = init_integer_type (objfile, 8, 1, "unsigned char");
2138 rettype = init_integer_type (objfile, 8, 0, "signed char");
2141 rettype = init_integer_type (objfile, 16, 1, "unsigned short");
2144 rettype = init_integer_type (objfile, 32, 1, "unsigned int");
2147 rettype = init_integer_type (objfile, 32, 1, "unsigned");
2150 rettype = init_integer_type (objfile, 32, 1, "unsigned long");
2153 rettype = init_type (objfile, TYPE_CODE_VOID, 1, "void");
2156 /* IEEE single precision (32 bit). */
2157 rettype = init_float_type (objfile, 32, "float",
2158 floatformats_ieee_single);
2161 /* IEEE double precision (64 bit). */
2162 rettype = init_float_type (objfile, 64, "double",
2163 floatformats_ieee_double);
2166 /* This is an IEEE double on the RS/6000, and different machines with
2167 different sizes for "long double" should use different negative
2168 type numbers. See stabs.texinfo. */
2169 rettype = init_float_type (objfile, 64, "long double",
2170 floatformats_ieee_double);
2173 rettype = init_integer_type (objfile, 32, 0, "integer");
2176 rettype = init_boolean_type (objfile, 32, 1, "boolean");
2179 rettype = init_float_type (objfile, 32, "short real",
2180 floatformats_ieee_single);
2183 rettype = init_float_type (objfile, 64, "real",
2184 floatformats_ieee_double);
2187 rettype = init_type (objfile, TYPE_CODE_ERROR, 0, "stringptr");
2190 rettype = init_character_type (objfile, 8, 1, "character");
2193 rettype = init_boolean_type (objfile, 8, 1, "logical*1");
2196 rettype = init_boolean_type (objfile, 16, 1, "logical*2");
2199 rettype = init_boolean_type (objfile, 32, 1, "logical*4");
2202 rettype = init_boolean_type (objfile, 32, 1, "logical");
2205 /* Complex type consisting of two IEEE single precision values. */
2206 rettype = init_complex_type (objfile, "complex",
2207 rs6000_builtin_type (12, objfile));
2210 /* Complex type consisting of two IEEE double precision values. */
2211 rettype = init_complex_type (objfile, "double complex",
2212 rs6000_builtin_type (13, objfile));
2215 rettype = init_integer_type (objfile, 8, 0, "integer*1");
2218 rettype = init_integer_type (objfile, 16, 0, "integer*2");
2221 rettype = init_integer_type (objfile, 32, 0, "integer*4");
2224 rettype = init_character_type (objfile, 16, 0, "wchar");
2227 rettype = init_integer_type (objfile, 64, 0, "long long");
2230 rettype = init_integer_type (objfile, 64, 1, "unsigned long long");
2233 rettype = init_integer_type (objfile, 64, 1, "logical*8");
2236 rettype = init_integer_type (objfile, 64, 0, "integer*8");
2239 negative_types[-typenum] = rettype;
2243 /* This page contains subroutines of read_type. */
2245 /* Wrapper around method_name_from_physname to flag a complaint
2246 if there is an error. */
2249 stabs_method_name_from_physname (const char *physname)
2253 method_name = method_name_from_physname (physname);
2255 if (method_name == NULL)
2257 complaint (&symfile_complaints,
2258 _("Method has bad physname %s\n"), physname);
2265 /* Read member function stabs info for C++ classes. The form of each member
2268 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2270 An example with two member functions is:
2272 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2274 For the case of overloaded operators, the format is op$::*.funcs, where
2275 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2276 name (such as `+=') and `.' marks the end of the operator name.
2278 Returns 1 for success, 0 for failure. */
2281 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2282 struct objfile *objfile)
2289 struct next_fnfield *next;
2290 struct fn_field fn_field;
2293 struct type *look_ahead_type;
2294 struct next_fnfieldlist *new_fnlist;
2295 struct next_fnfield *new_sublist;
2299 /* Process each list until we find something that is not a member function
2300 or find the end of the functions. */
2304 /* We should be positioned at the start of the function name.
2305 Scan forward to find the first ':' and if it is not the
2306 first of a "::" delimiter, then this is not a member function. */
2318 look_ahead_type = NULL;
2321 new_fnlist = XCNEW (struct next_fnfieldlist);
2322 make_cleanup (xfree, new_fnlist);
2324 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2326 /* This is a completely wierd case. In order to stuff in the
2327 names that might contain colons (the usual name delimiter),
2328 Mike Tiemann defined a different name format which is
2329 signalled if the identifier is "op$". In that case, the
2330 format is "op$::XXXX." where XXXX is the name. This is
2331 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2332 /* This lets the user type "break operator+".
2333 We could just put in "+" as the name, but that wouldn't
2335 static char opname[32] = "op$";
2336 char *o = opname + 3;
2338 /* Skip past '::'. */
2341 STABS_CONTINUE (pp, objfile);
2347 main_fn_name = savestring (opname, o - opname);
2353 main_fn_name = savestring (*pp, p - *pp);
2354 /* Skip past '::'. */
2357 new_fnlist->fn_fieldlist.name = main_fn_name;
2361 new_sublist = XCNEW (struct next_fnfield);
2362 make_cleanup (xfree, new_sublist);
2364 /* Check for and handle cretinous dbx symbol name continuation! */
2365 if (look_ahead_type == NULL)
2368 STABS_CONTINUE (pp, objfile);
2370 new_sublist->fn_field.type = read_type (pp, objfile);
2373 /* Invalid symtab info for member function. */
2379 /* g++ version 1 kludge */
2380 new_sublist->fn_field.type = look_ahead_type;
2381 look_ahead_type = NULL;
2391 /* These are methods, not functions. */
2392 if (TYPE_CODE (new_sublist->fn_field.type) == TYPE_CODE_FUNC)
2393 TYPE_CODE (new_sublist->fn_field.type) = TYPE_CODE_METHOD;
2395 gdb_assert (TYPE_CODE (new_sublist->fn_field.type)
2396 == TYPE_CODE_METHOD);
2398 /* If this is just a stub, then we don't have the real name here. */
2399 if (TYPE_STUB (new_sublist->fn_field.type))
2401 if (!TYPE_SELF_TYPE (new_sublist->fn_field.type))
2402 set_type_self_type (new_sublist->fn_field.type, type);
2403 new_sublist->fn_field.is_stub = 1;
2406 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2409 /* Set this member function's visibility fields. */
2412 case VISIBILITY_PRIVATE:
2413 new_sublist->fn_field.is_private = 1;
2415 case VISIBILITY_PROTECTED:
2416 new_sublist->fn_field.is_protected = 1;
2420 STABS_CONTINUE (pp, objfile);
2423 case 'A': /* Normal functions. */
2424 new_sublist->fn_field.is_const = 0;
2425 new_sublist->fn_field.is_volatile = 0;
2428 case 'B': /* `const' member functions. */
2429 new_sublist->fn_field.is_const = 1;
2430 new_sublist->fn_field.is_volatile = 0;
2433 case 'C': /* `volatile' member function. */
2434 new_sublist->fn_field.is_const = 0;
2435 new_sublist->fn_field.is_volatile = 1;
2438 case 'D': /* `const volatile' member function. */
2439 new_sublist->fn_field.is_const = 1;
2440 new_sublist->fn_field.is_volatile = 1;
2443 case '*': /* File compiled with g++ version 1 --
2449 complaint (&symfile_complaints,
2450 _("const/volatile indicator missing, got '%c'"),
2460 /* virtual member function, followed by index.
2461 The sign bit is set to distinguish pointers-to-methods
2462 from virtual function indicies. Since the array is
2463 in words, the quantity must be shifted left by 1
2464 on 16 bit machine, and by 2 on 32 bit machine, forcing
2465 the sign bit out, and usable as a valid index into
2466 the array. Remove the sign bit here. */
2467 new_sublist->fn_field.voffset =
2468 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2472 STABS_CONTINUE (pp, objfile);
2473 if (**pp == ';' || **pp == '\0')
2475 /* Must be g++ version 1. */
2476 new_sublist->fn_field.fcontext = 0;
2480 /* Figure out from whence this virtual function came.
2481 It may belong to virtual function table of
2482 one of its baseclasses. */
2483 look_ahead_type = read_type (pp, objfile);
2486 /* g++ version 1 overloaded methods. */
2490 new_sublist->fn_field.fcontext = look_ahead_type;
2499 look_ahead_type = NULL;
2505 /* static member function. */
2507 int slen = strlen (main_fn_name);
2509 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2511 /* For static member functions, we can't tell if they
2512 are stubbed, as they are put out as functions, and not as
2514 GCC v2 emits the fully mangled name if
2515 dbxout.c:flag_minimal_debug is not set, so we have to
2516 detect a fully mangled physname here and set is_stub
2517 accordingly. Fully mangled physnames in v2 start with
2518 the member function name, followed by two underscores.
2519 GCC v3 currently always emits stubbed member functions,
2520 but with fully mangled physnames, which start with _Z. */
2521 if (!(strncmp (new_sublist->fn_field.physname,
2522 main_fn_name, slen) == 0
2523 && new_sublist->fn_field.physname[slen] == '_'
2524 && new_sublist->fn_field.physname[slen + 1] == '_'))
2526 new_sublist->fn_field.is_stub = 1;
2533 complaint (&symfile_complaints,
2534 _("member function type missing, got '%c'"),
2536 /* Fall through into normal member function. */
2539 /* normal member function. */
2540 new_sublist->fn_field.voffset = 0;
2541 new_sublist->fn_field.fcontext = 0;
2545 new_sublist->next = sublist;
2546 sublist = new_sublist;
2548 STABS_CONTINUE (pp, objfile);
2550 while (**pp != ';' && **pp != '\0');
2553 STABS_CONTINUE (pp, objfile);
2555 /* Skip GCC 3.X member functions which are duplicates of the callable
2556 constructor/destructor. */
2557 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2558 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2559 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2561 xfree (main_fn_name);
2566 int has_destructor = 0, has_other = 0;
2568 struct next_fnfield *tmp_sublist;
2570 /* Various versions of GCC emit various mostly-useless
2571 strings in the name field for special member functions.
2573 For stub methods, we need to defer correcting the name
2574 until we are ready to unstub the method, because the current
2575 name string is used by gdb_mangle_name. The only stub methods
2576 of concern here are GNU v2 operators; other methods have their
2577 names correct (see caveat below).
2579 For non-stub methods, in GNU v3, we have a complete physname.
2580 Therefore we can safely correct the name now. This primarily
2581 affects constructors and destructors, whose name will be
2582 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2583 operators will also have incorrect names; for instance,
2584 "operator int" will be named "operator i" (i.e. the type is
2587 For non-stub methods in GNU v2, we have no easy way to
2588 know if we have a complete physname or not. For most
2589 methods the result depends on the platform (if CPLUS_MARKER
2590 can be `$' or `.', it will use minimal debug information, or
2591 otherwise the full physname will be included).
2593 Rather than dealing with this, we take a different approach.
2594 For v3 mangled names, we can use the full physname; for v2,
2595 we use cplus_demangle_opname (which is actually v2 specific),
2596 because the only interesting names are all operators - once again
2597 barring the caveat below. Skip this process if any method in the
2598 group is a stub, to prevent our fouling up the workings of
2601 The caveat: GCC 2.95.x (and earlier?) put constructors and
2602 destructors in the same method group. We need to split this
2603 into two groups, because they should have different names.
2604 So for each method group we check whether it contains both
2605 routines whose physname appears to be a destructor (the physnames
2606 for and destructors are always provided, due to quirks in v2
2607 mangling) and routines whose physname does not appear to be a
2608 destructor. If so then we break up the list into two halves.
2609 Even if the constructors and destructors aren't in the same group
2610 the destructor will still lack the leading tilde, so that also
2613 So, to summarize what we expect and handle here:
2615 Given Given Real Real Action
2616 method name physname physname method name
2618 __opi [none] __opi__3Foo operator int opname
2620 Foo _._3Foo _._3Foo ~Foo separate and
2622 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2623 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2626 tmp_sublist = sublist;
2627 while (tmp_sublist != NULL)
2629 if (tmp_sublist->fn_field.is_stub)
2631 if (tmp_sublist->fn_field.physname[0] == '_'
2632 && tmp_sublist->fn_field.physname[1] == 'Z')
2635 if (is_destructor_name (tmp_sublist->fn_field.physname))
2640 tmp_sublist = tmp_sublist->next;
2643 if (has_destructor && has_other)
2645 struct next_fnfieldlist *destr_fnlist;
2646 struct next_fnfield *last_sublist;
2648 /* Create a new fn_fieldlist for the destructors. */
2650 destr_fnlist = XCNEW (struct next_fnfieldlist);
2651 make_cleanup (xfree, destr_fnlist);
2653 destr_fnlist->fn_fieldlist.name
2654 = obconcat (&objfile->objfile_obstack, "~",
2655 new_fnlist->fn_fieldlist.name, (char *) NULL);
2657 destr_fnlist->fn_fieldlist.fn_fields =
2658 XOBNEWVEC (&objfile->objfile_obstack,
2659 struct fn_field, has_destructor);
2660 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2661 sizeof (struct fn_field) * has_destructor);
2662 tmp_sublist = sublist;
2663 last_sublist = NULL;
2665 while (tmp_sublist != NULL)
2667 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2669 tmp_sublist = tmp_sublist->next;
2673 destr_fnlist->fn_fieldlist.fn_fields[i++]
2674 = tmp_sublist->fn_field;
2676 last_sublist->next = tmp_sublist->next;
2678 sublist = tmp_sublist->next;
2679 last_sublist = tmp_sublist;
2680 tmp_sublist = tmp_sublist->next;
2683 destr_fnlist->fn_fieldlist.length = has_destructor;
2684 destr_fnlist->next = fip->fnlist;
2685 fip->fnlist = destr_fnlist;
2687 length -= has_destructor;
2691 /* v3 mangling prevents the use of abbreviated physnames,
2692 so we can do this here. There are stubbed methods in v3
2694 - in -gstabs instead of -gstabs+
2695 - or for static methods, which are output as a function type
2696 instead of a method type. */
2697 char *new_method_name =
2698 stabs_method_name_from_physname (sublist->fn_field.physname);
2700 if (new_method_name != NULL
2701 && strcmp (new_method_name,
2702 new_fnlist->fn_fieldlist.name) != 0)
2704 new_fnlist->fn_fieldlist.name = new_method_name;
2705 xfree (main_fn_name);
2708 xfree (new_method_name);
2710 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2712 new_fnlist->fn_fieldlist.name =
2713 obconcat (&objfile->objfile_obstack,
2714 "~", main_fn_name, (char *)NULL);
2715 xfree (main_fn_name);
2719 char dem_opname[256];
2722 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2723 dem_opname, DMGL_ANSI);
2725 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2728 new_fnlist->fn_fieldlist.name
2730 obstack_copy0 (&objfile->objfile_obstack, dem_opname,
2731 strlen (dem_opname)));
2732 xfree (main_fn_name);
2735 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2736 obstack_alloc (&objfile->objfile_obstack,
2737 sizeof (struct fn_field) * length);
2738 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2739 sizeof (struct fn_field) * length);
2740 for (i = length; (i--, sublist); sublist = sublist->next)
2742 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2745 new_fnlist->fn_fieldlist.length = length;
2746 new_fnlist->next = fip->fnlist;
2747 fip->fnlist = new_fnlist;
2754 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2755 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2756 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2757 memset (TYPE_FN_FIELDLISTS (type), 0,
2758 sizeof (struct fn_fieldlist) * nfn_fields);
2759 TYPE_NFN_FIELDS (type) = nfn_fields;
2765 /* Special GNU C++ name.
2767 Returns 1 for success, 0 for failure. "failure" means that we can't
2768 keep parsing and it's time for error_type(). */
2771 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2772 struct objfile *objfile)
2777 struct type *context;
2787 /* At this point, *pp points to something like "22:23=*22...",
2788 where the type number before the ':' is the "context" and
2789 everything after is a regular type definition. Lookup the
2790 type, find it's name, and construct the field name. */
2792 context = read_type (pp, objfile);
2796 case 'f': /* $vf -- a virtual function table pointer */
2797 name = type_name_no_tag (context);
2802 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2803 vptr_name, name, (char *) NULL);
2806 case 'b': /* $vb -- a virtual bsomethingorother */
2807 name = type_name_no_tag (context);
2810 complaint (&symfile_complaints,
2811 _("C++ abbreviated type name "
2812 "unknown at symtab pos %d"),
2816 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2817 name, (char *) NULL);
2821 invalid_cpp_abbrev_complaint (*pp);
2822 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2823 "INVALID_CPLUSPLUS_ABBREV",
2828 /* At this point, *pp points to the ':'. Skip it and read the
2834 invalid_cpp_abbrev_complaint (*pp);
2837 fip->list->field.type = read_type (pp, objfile);
2839 (*pp)++; /* Skip the comma. */
2846 SET_FIELD_BITPOS (fip->list->field,
2847 read_huge_number (pp, ';', &nbits, 0));
2851 /* This field is unpacked. */
2852 FIELD_BITSIZE (fip->list->field) = 0;
2853 fip->list->visibility = VISIBILITY_PRIVATE;
2857 invalid_cpp_abbrev_complaint (*pp);
2858 /* We have no idea what syntax an unrecognized abbrev would have, so
2859 better return 0. If we returned 1, we would need to at least advance
2860 *pp to avoid an infinite loop. */
2867 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2868 struct type *type, struct objfile *objfile)
2870 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2872 fip->list->field.name
2873 = (const char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
2876 /* This means we have a visibility for a field coming. */
2880 fip->list->visibility = *(*pp)++;
2884 /* normal dbx-style format, no explicit visibility */
2885 fip->list->visibility = VISIBILITY_PUBLIC;
2888 fip->list->field.type = read_type (pp, objfile);
2893 /* Possible future hook for nested types. */
2896 fip->list->field.bitpos = (long) -2; /* nested type */
2906 /* Static class member. */
2907 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2911 else if (**pp != ',')
2913 /* Bad structure-type format. */
2914 stabs_general_complaint ("bad structure-type format");
2918 (*pp)++; /* Skip the comma. */
2923 SET_FIELD_BITPOS (fip->list->field,
2924 read_huge_number (pp, ',', &nbits, 0));
2927 stabs_general_complaint ("bad structure-type format");
2930 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2933 stabs_general_complaint ("bad structure-type format");
2938 if (FIELD_BITPOS (fip->list->field) == 0
2939 && FIELD_BITSIZE (fip->list->field) == 0)
2941 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2942 it is a field which has been optimized out. The correct stab for
2943 this case is to use VISIBILITY_IGNORE, but that is a recent
2944 invention. (2) It is a 0-size array. For example
2945 union { int num; char str[0]; } foo. Printing _("<no value>" for
2946 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2947 will continue to work, and a 0-size array as a whole doesn't
2948 have any contents to print.
2950 I suspect this probably could also happen with gcc -gstabs (not
2951 -gstabs+) for static fields, and perhaps other C++ extensions.
2952 Hopefully few people use -gstabs with gdb, since it is intended
2953 for dbx compatibility. */
2955 /* Ignore this field. */
2956 fip->list->visibility = VISIBILITY_IGNORE;
2960 /* Detect an unpacked field and mark it as such.
2961 dbx gives a bit size for all fields.
2962 Note that forward refs cannot be packed,
2963 and treat enums as if they had the width of ints. */
2965 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2967 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2968 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2969 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2970 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2972 FIELD_BITSIZE (fip->list->field) = 0;
2974 if ((FIELD_BITSIZE (fip->list->field)
2975 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2976 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2977 && FIELD_BITSIZE (fip->list->field)
2978 == gdbarch_int_bit (gdbarch))
2981 FIELD_BITPOS (fip->list->field) % 8 == 0)
2983 FIELD_BITSIZE (fip->list->field) = 0;
2989 /* Read struct or class data fields. They have the form:
2991 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2993 At the end, we see a semicolon instead of a field.
2995 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2998 The optional VISIBILITY is one of:
3000 '/0' (VISIBILITY_PRIVATE)
3001 '/1' (VISIBILITY_PROTECTED)
3002 '/2' (VISIBILITY_PUBLIC)
3003 '/9' (VISIBILITY_IGNORE)
3005 or nothing, for C style fields with public visibility.
3007 Returns 1 for success, 0 for failure. */
3010 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
3011 struct objfile *objfile)
3014 struct nextfield *newobj;
3016 /* We better set p right now, in case there are no fields at all... */
3020 /* Read each data member type until we find the terminating ';' at the end of
3021 the data member list, or break for some other reason such as finding the
3022 start of the member function list. */
3023 /* Stab string for structure/union does not end with two ';' in
3024 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3026 while (**pp != ';' && **pp != '\0')
3028 STABS_CONTINUE (pp, objfile);
3029 /* Get space to record the next field's data. */
3030 newobj = XCNEW (struct nextfield);
3031 make_cleanup (xfree, newobj);
3033 newobj->next = fip->list;
3036 /* Get the field name. */
3039 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3040 unless the CPLUS_MARKER is followed by an underscore, in
3041 which case it is just the name of an anonymous type, which we
3042 should handle like any other type name. */
3044 if (is_cplus_marker (p[0]) && p[1] != '_')
3046 if (!read_cpp_abbrev (fip, pp, type, objfile))
3051 /* Look for the ':' that separates the field name from the field
3052 values. Data members are delimited by a single ':', while member
3053 functions are delimited by a pair of ':'s. When we hit the member
3054 functions (if any), terminate scan loop and return. */
3056 while (*p != ':' && *p != '\0')
3063 /* Check to see if we have hit the member functions yet. */
3068 read_one_struct_field (fip, pp, p, type, objfile);
3070 if (p[0] == ':' && p[1] == ':')
3072 /* (the deleted) chill the list of fields: the last entry (at
3073 the head) is a partially constructed entry which we now
3075 fip->list = fip->list->next;
3080 /* The stabs for C++ derived classes contain baseclass information which
3081 is marked by a '!' character after the total size. This function is
3082 called when we encounter the baseclass marker, and slurps up all the
3083 baseclass information.
3085 Immediately following the '!' marker is the number of base classes that
3086 the class is derived from, followed by information for each base class.
3087 For each base class, there are two visibility specifiers, a bit offset
3088 to the base class information within the derived class, a reference to
3089 the type for the base class, and a terminating semicolon.
3091 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3093 Baseclass information marker __________________|| | | | | | |
3094 Number of baseclasses __________________________| | | | | | |
3095 Visibility specifiers (2) ________________________| | | | | |
3096 Offset in bits from start of class _________________| | | | |
3097 Type number for base class ___________________________| | | |
3098 Visibility specifiers (2) _______________________________| | |
3099 Offset in bits from start of class ________________________| |
3100 Type number of base class ____________________________________|
3102 Return 1 for success, 0 for (error-type-inducing) failure. */
3108 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3109 struct objfile *objfile)
3112 struct nextfield *newobj;
3120 /* Skip the '!' baseclass information marker. */
3124 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3128 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3134 /* Some stupid compilers have trouble with the following, so break
3135 it up into simpler expressions. */
3136 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3137 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3140 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3143 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3144 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3148 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3150 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3152 newobj = XCNEW (struct nextfield);
3153 make_cleanup (xfree, newobj);
3155 newobj->next = fip->list;
3157 FIELD_BITSIZE (newobj->field) = 0; /* This should be an unpacked
3160 STABS_CONTINUE (pp, objfile);
3164 /* Nothing to do. */
3167 SET_TYPE_FIELD_VIRTUAL (type, i);
3170 /* Unknown character. Complain and treat it as non-virtual. */
3172 complaint (&symfile_complaints,
3173 _("Unknown virtual character `%c' for baseclass"),
3179 newobj->visibility = *(*pp)++;
3180 switch (newobj->visibility)
3182 case VISIBILITY_PRIVATE:
3183 case VISIBILITY_PROTECTED:
3184 case VISIBILITY_PUBLIC:
3187 /* Bad visibility format. Complain and treat it as
3190 complaint (&symfile_complaints,
3191 _("Unknown visibility `%c' for baseclass"),
3192 newobj->visibility);
3193 newobj->visibility = VISIBILITY_PUBLIC;
3200 /* The remaining value is the bit offset of the portion of the object
3201 corresponding to this baseclass. Always zero in the absence of
3202 multiple inheritance. */
3204 SET_FIELD_BITPOS (newobj->field, read_huge_number (pp, ',', &nbits, 0));
3209 /* The last piece of baseclass information is the type of the
3210 base class. Read it, and remember it's type name as this
3213 newobj->field.type = read_type (pp, objfile);
3214 newobj->field.name = type_name_no_tag (newobj->field.type);
3216 /* Skip trailing ';' and bump count of number of fields seen. */
3225 /* The tail end of stabs for C++ classes that contain a virtual function
3226 pointer contains a tilde, a %, and a type number.
3227 The type number refers to the base class (possibly this class itself) which
3228 contains the vtable pointer for the current class.
3230 This function is called when we have parsed all the method declarations,
3231 so we can look for the vptr base class info. */
3234 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3235 struct objfile *objfile)
3239 STABS_CONTINUE (pp, objfile);
3241 /* If we are positioned at a ';', then skip it. */
3251 if (**pp == '=' || **pp == '+' || **pp == '-')
3253 /* Obsolete flags that used to indicate the presence
3254 of constructors and/or destructors. */
3258 /* Read either a '%' or the final ';'. */
3259 if (*(*pp)++ == '%')
3261 /* The next number is the type number of the base class
3262 (possibly our own class) which supplies the vtable for
3263 this class. Parse it out, and search that class to find
3264 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3265 and TYPE_VPTR_FIELDNO. */
3270 t = read_type (pp, objfile);
3272 while (*p != '\0' && *p != ';')
3278 /* Premature end of symbol. */
3282 set_type_vptr_basetype (type, t);
3283 if (type == t) /* Our own class provides vtbl ptr. */
3285 for (i = TYPE_NFIELDS (t) - 1;
3286 i >= TYPE_N_BASECLASSES (t);
3289 const char *name = TYPE_FIELD_NAME (t, i);
3291 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3292 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3294 set_type_vptr_fieldno (type, i);
3298 /* Virtual function table field not found. */
3299 complaint (&symfile_complaints,
3300 _("virtual function table pointer "
3301 "not found when defining class `%s'"),
3307 set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t));
3318 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3322 for (n = TYPE_NFN_FIELDS (type);
3323 fip->fnlist != NULL;
3324 fip->fnlist = fip->fnlist->next)
3326 --n; /* Circumvent Sun3 compiler bug. */
3327 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3332 /* Create the vector of fields, and record how big it is.
3333 We need this info to record proper virtual function table information
3334 for this class's virtual functions. */
3337 attach_fields_to_type (struct field_info *fip, struct type *type,
3338 struct objfile *objfile)
3341 int non_public_fields = 0;
3342 struct nextfield *scan;
3344 /* Count up the number of fields that we have, as well as taking note of
3345 whether or not there are any non-public fields, which requires us to
3346 allocate and build the private_field_bits and protected_field_bits
3349 for (scan = fip->list; scan != NULL; scan = scan->next)
3352 if (scan->visibility != VISIBILITY_PUBLIC)
3354 non_public_fields++;
3358 /* Now we know how many fields there are, and whether or not there are any
3359 non-public fields. Record the field count, allocate space for the
3360 array of fields, and create blank visibility bitfields if necessary. */
3362 TYPE_NFIELDS (type) = nfields;
3363 TYPE_FIELDS (type) = (struct field *)
3364 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3365 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3367 if (non_public_fields)
3369 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3371 TYPE_FIELD_PRIVATE_BITS (type) =
3372 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3373 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3375 TYPE_FIELD_PROTECTED_BITS (type) =
3376 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3377 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3379 TYPE_FIELD_IGNORE_BITS (type) =
3380 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3381 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3384 /* Copy the saved-up fields into the field vector. Start from the
3385 head of the list, adding to the tail of the field array, so that
3386 they end up in the same order in the array in which they were
3387 added to the list. */
3389 while (nfields-- > 0)
3391 TYPE_FIELD (type, nfields) = fip->list->field;
3392 switch (fip->list->visibility)
3394 case VISIBILITY_PRIVATE:
3395 SET_TYPE_FIELD_PRIVATE (type, nfields);
3398 case VISIBILITY_PROTECTED:
3399 SET_TYPE_FIELD_PROTECTED (type, nfields);
3402 case VISIBILITY_IGNORE:
3403 SET_TYPE_FIELD_IGNORE (type, nfields);
3406 case VISIBILITY_PUBLIC:
3410 /* Unknown visibility. Complain and treat it as public. */
3412 complaint (&symfile_complaints,
3413 _("Unknown visibility `%c' for field"),
3414 fip->list->visibility);
3418 fip->list = fip->list->next;
3424 /* Complain that the compiler has emitted more than one definition for the
3425 structure type TYPE. */
3427 complain_about_struct_wipeout (struct type *type)
3429 const char *name = "";
3430 const char *kind = "";
3432 if (TYPE_TAG_NAME (type))
3434 name = TYPE_TAG_NAME (type);
3435 switch (TYPE_CODE (type))
3437 case TYPE_CODE_STRUCT: kind = "struct "; break;
3438 case TYPE_CODE_UNION: kind = "union "; break;
3439 case TYPE_CODE_ENUM: kind = "enum "; break;
3443 else if (TYPE_NAME (type))
3445 name = TYPE_NAME (type);
3454 complaint (&symfile_complaints,
3455 _("struct/union type gets multiply defined: %s%s"), kind, name);
3458 /* Set the length for all variants of a same main_type, which are
3459 connected in the closed chain.
3461 This is something that needs to be done when a type is defined *after*
3462 some cross references to this type have already been read. Consider
3463 for instance the following scenario where we have the following two
3466 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3467 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3469 A stubbed version of type dummy is created while processing the first
3470 stabs entry. The length of that type is initially set to zero, since
3471 it is unknown at this point. Also, a "constant" variation of type
3472 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3475 The second stabs entry allows us to replace the stubbed definition
3476 with the real definition. However, we still need to adjust the length
3477 of the "constant" variation of that type, as its length was left
3478 untouched during the main type replacement... */
3481 set_length_in_type_chain (struct type *type)
3483 struct type *ntype = TYPE_CHAIN (type);
3485 while (ntype != type)
3487 if (TYPE_LENGTH(ntype) == 0)
3488 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3490 complain_about_struct_wipeout (ntype);
3491 ntype = TYPE_CHAIN (ntype);
3495 /* Read the description of a structure (or union type) and return an object
3496 describing the type.
3498 PP points to a character pointer that points to the next unconsumed token
3499 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3500 *PP will point to "4a:1,0,32;;".
3502 TYPE points to an incomplete type that needs to be filled in.
3504 OBJFILE points to the current objfile from which the stabs information is
3505 being read. (Note that it is redundant in that TYPE also contains a pointer
3506 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3509 static struct type *
3510 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3511 struct objfile *objfile)
3513 struct cleanup *back_to;
3514 struct field_info fi;
3519 /* When describing struct/union/class types in stabs, G++ always drops
3520 all qualifications from the name. So if you've got:
3521 struct A { ... struct B { ... }; ... };
3522 then G++ will emit stabs for `struct A::B' that call it simply
3523 `struct B'. Obviously, if you've got a real top-level definition for
3524 `struct B', or other nested definitions, this is going to cause
3527 Obviously, GDB can't fix this by itself, but it can at least avoid
3528 scribbling on existing structure type objects when new definitions
3530 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3531 || TYPE_STUB (type)))
3533 complain_about_struct_wipeout (type);
3535 /* It's probably best to return the type unchanged. */
3539 back_to = make_cleanup (null_cleanup, 0);
3541 INIT_CPLUS_SPECIFIC (type);
3542 TYPE_CODE (type) = type_code;
3543 TYPE_STUB (type) = 0;
3545 /* First comes the total size in bytes. */
3550 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3553 do_cleanups (back_to);
3554 return error_type (pp, objfile);
3556 set_length_in_type_chain (type);
3559 /* Now read the baseclasses, if any, read the regular C struct or C++
3560 class member fields, attach the fields to the type, read the C++
3561 member functions, attach them to the type, and then read any tilde
3562 field (baseclass specifier for the class holding the main vtable). */
3564 if (!read_baseclasses (&fi, pp, type, objfile)
3565 || !read_struct_fields (&fi, pp, type, objfile)
3566 || !attach_fields_to_type (&fi, type, objfile)
3567 || !read_member_functions (&fi, pp, type, objfile)
3568 || !attach_fn_fields_to_type (&fi, type)
3569 || !read_tilde_fields (&fi, pp, type, objfile))
3571 type = error_type (pp, objfile);
3574 do_cleanups (back_to);
3578 /* Read a definition of an array type,
3579 and create and return a suitable type object.
3580 Also creates a range type which represents the bounds of that
3583 static struct type *
3584 read_array_type (char **pp, struct type *type,
3585 struct objfile *objfile)
3587 struct type *index_type, *element_type, *range_type;
3592 /* Format of an array type:
3593 "ar<index type>;lower;upper;<array_contents_type>".
3594 OS9000: "arlower,upper;<array_contents_type>".
3596 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3597 for these, produce a type like float[][]. */
3600 index_type = read_type (pp, objfile);
3602 /* Improper format of array type decl. */
3603 return error_type (pp, objfile);
3607 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3612 lower = read_huge_number (pp, ';', &nbits, 0);
3615 return error_type (pp, objfile);
3617 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3622 upper = read_huge_number (pp, ';', &nbits, 0);
3624 return error_type (pp, objfile);
3626 element_type = read_type (pp, objfile);
3635 create_static_range_type ((struct type *) NULL, index_type, lower, upper);
3636 type = create_array_type (type, element_type, range_type);
3642 /* Read a definition of an enumeration type,
3643 and create and return a suitable type object.
3644 Also defines the symbols that represent the values of the type. */
3646 static struct type *
3647 read_enum_type (char **pp, struct type *type,
3648 struct objfile *objfile)
3650 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3656 struct pending **symlist;
3657 struct pending *osyms, *syms;
3660 int unsigned_enum = 1;
3663 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3664 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3665 to do? For now, force all enum values to file scope. */
3666 if (within_function)
3667 symlist = &local_symbols;
3670 symlist = &file_symbols;
3672 o_nsyms = osyms ? osyms->nsyms : 0;
3674 /* The aix4 compiler emits an extra field before the enum members;
3675 my guess is it's a type of some sort. Just ignore it. */
3678 /* Skip over the type. */
3682 /* Skip over the colon. */
3686 /* Read the value-names and their values.
3687 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3688 A semicolon or comma instead of a NAME means the end. */
3689 while (**pp && **pp != ';' && **pp != ',')
3691 STABS_CONTINUE (pp, objfile);
3695 name = (char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
3697 n = read_huge_number (pp, ',', &nbits, 0);
3699 return error_type (pp, objfile);
3701 sym = allocate_symbol (objfile);
3702 SYMBOL_SET_LINKAGE_NAME (sym, name);
3703 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
3704 &objfile->objfile_obstack);
3705 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
3706 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3707 SYMBOL_VALUE (sym) = n;
3710 add_symbol_to_list (sym, symlist);
3715 (*pp)++; /* Skip the semicolon. */
3717 /* Now fill in the fields of the type-structure. */
3719 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3720 set_length_in_type_chain (type);
3721 TYPE_CODE (type) = TYPE_CODE_ENUM;
3722 TYPE_STUB (type) = 0;
3724 TYPE_UNSIGNED (type) = 1;
3725 TYPE_NFIELDS (type) = nsyms;
3726 TYPE_FIELDS (type) = (struct field *)
3727 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3728 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3730 /* Find the symbols for the values and put them into the type.
3731 The symbols can be found in the symlist that we put them on
3732 to cause them to be defined. osyms contains the old value
3733 of that symlist; everything up to there was defined by us. */
3734 /* Note that we preserve the order of the enum constants, so
3735 that in something like "enum {FOO, LAST_THING=FOO}" we print
3736 FOO, not LAST_THING. */
3738 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3740 int last = syms == osyms ? o_nsyms : 0;
3741 int j = syms->nsyms;
3743 for (; --j >= last; --n)
3745 struct symbol *xsym = syms->symbol[j];
3747 SYMBOL_TYPE (xsym) = type;
3748 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3749 SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
3750 TYPE_FIELD_BITSIZE (type, n) = 0;
3759 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3760 typedefs in every file (for int, long, etc):
3762 type = b <signed> <width> <format type>; <offset>; <nbits>
3764 optional format type = c or b for char or boolean.
3765 offset = offset from high order bit to start bit of type.
3766 width is # bytes in object of this type, nbits is # bits in type.
3768 The width/offset stuff appears to be for small objects stored in
3769 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3772 static struct type *
3773 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3778 int boolean_type = 0;
3789 return error_type (pp, objfile);
3793 /* For some odd reason, all forms of char put a c here. This is strange
3794 because no other type has this honor. We can safely ignore this because
3795 we actually determine 'char'acterness by the number of bits specified in
3797 Boolean forms, e.g Fortran logical*X, put a b here. */
3801 else if (**pp == 'b')
3807 /* The first number appears to be the number of bytes occupied
3808 by this type, except that unsigned short is 4 instead of 2.
3809 Since this information is redundant with the third number,
3810 we will ignore it. */
3811 read_huge_number (pp, ';', &nbits, 0);
3813 return error_type (pp, objfile);
3815 /* The second number is always 0, so ignore it too. */
3816 read_huge_number (pp, ';', &nbits, 0);
3818 return error_type (pp, objfile);
3820 /* The third number is the number of bits for this type. */
3821 type_bits = read_huge_number (pp, 0, &nbits, 0);
3823 return error_type (pp, objfile);
3824 /* The type *should* end with a semicolon. If it are embedded
3825 in a larger type the semicolon may be the only way to know where
3826 the type ends. If this type is at the end of the stabstring we
3827 can deal with the omitted semicolon (but we don't have to like
3828 it). Don't bother to complain(), Sun's compiler omits the semicolon
3835 struct type *type = init_type (objfile, TYPE_CODE_VOID, 1, NULL);
3837 TYPE_UNSIGNED (type) = 1;
3842 return init_boolean_type (objfile, type_bits, unsigned_type, NULL);
3844 return init_integer_type (objfile, type_bits, unsigned_type, NULL);
3847 static struct type *
3848 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3853 struct type *rettype;
3855 /* The first number has more details about the type, for example
3857 details = read_huge_number (pp, ';', &nbits, 0);
3859 return error_type (pp, objfile);
3861 /* The second number is the number of bytes occupied by this type. */
3862 nbytes = read_huge_number (pp, ';', &nbits, 0);
3864 return error_type (pp, objfile);
3866 nbits = nbytes * TARGET_CHAR_BIT;
3868 if (details == NF_COMPLEX || details == NF_COMPLEX16
3869 || details == NF_COMPLEX32)
3871 rettype = dbx_init_float_type (objfile, nbits / 2);
3872 return init_complex_type (objfile, NULL, rettype);
3875 return dbx_init_float_type (objfile, nbits);
3878 /* Read a number from the string pointed to by *PP.
3879 The value of *PP is advanced over the number.
3880 If END is nonzero, the character that ends the
3881 number must match END, or an error happens;
3882 and that character is skipped if it does match.
3883 If END is zero, *PP is left pointing to that character.
3885 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3886 the number is represented in an octal representation, assume that
3887 it is represented in a 2's complement representation with a size of
3888 TWOS_COMPLEMENT_BITS.
3890 If the number fits in a long, set *BITS to 0 and return the value.
3891 If not, set *BITS to be the number of bits in the number and return 0.
3893 If encounter garbage, set *BITS to -1 and return 0. */
3896 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3907 int twos_complement_representation = 0;
3915 /* Leading zero means octal. GCC uses this to output values larger
3916 than an int (because that would be hard in decimal). */
3923 /* Skip extra zeros. */
3927 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3929 /* Octal, possibly signed. Check if we have enough chars for a
3935 while ((c = *p1) >= '0' && c < '8')
3939 if (len > twos_complement_bits / 3
3940 || (twos_complement_bits % 3 == 0
3941 && len == twos_complement_bits / 3))
3943 /* Ok, we have enough characters for a signed value, check
3944 for signness by testing if the sign bit is set. */
3945 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3947 if (c & (1 << sign_bit))
3949 /* Definitely signed. */
3950 twos_complement_representation = 1;
3956 upper_limit = LONG_MAX / radix;
3958 while ((c = *p++) >= '0' && c < ('0' + radix))
3960 if (n <= upper_limit)
3962 if (twos_complement_representation)
3964 /* Octal, signed, twos complement representation. In
3965 this case, n is the corresponding absolute value. */
3968 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3980 /* unsigned representation */
3982 n += c - '0'; /* FIXME this overflows anyway. */
3988 /* This depends on large values being output in octal, which is
3995 /* Ignore leading zeroes. */
3999 else if (c == '2' || c == '3')
4020 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
4022 /* We were supposed to parse a number with maximum
4023 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4034 /* Large decimal constants are an error (because it is hard to
4035 count how many bits are in them). */
4041 /* -0x7f is the same as 0x80. So deal with it by adding one to
4042 the number of bits. Two's complement represention octals
4043 can't have a '-' in front. */
4044 if (sign == -1 && !twos_complement_representation)
4055 /* It's *BITS which has the interesting information. */
4059 static struct type *
4060 read_range_type (char **pp, int typenums[2], int type_size,
4061 struct objfile *objfile)
4063 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4064 char *orig_pp = *pp;
4069 struct type *result_type;
4070 struct type *index_type = NULL;
4072 /* First comes a type we are a subrange of.
4073 In C it is usually 0, 1 or the type being defined. */
4074 if (read_type_number (pp, rangenums) != 0)
4075 return error_type (pp, objfile);
4076 self_subrange = (rangenums[0] == typenums[0] &&
4077 rangenums[1] == typenums[1]);
4082 index_type = read_type (pp, objfile);
4085 /* A semicolon should now follow; skip it. */
4089 /* The remaining two operands are usually lower and upper bounds
4090 of the range. But in some special cases they mean something else. */
4091 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4092 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4094 if (n2bits == -1 || n3bits == -1)
4095 return error_type (pp, objfile);
4098 goto handle_true_range;
4100 /* If limits are huge, must be large integral type. */
4101 if (n2bits != 0 || n3bits != 0)
4103 char got_signed = 0;
4104 char got_unsigned = 0;
4105 /* Number of bits in the type. */
4108 /* If a type size attribute has been specified, the bounds of
4109 the range should fit in this size. If the lower bounds needs
4110 more bits than the upper bound, then the type is signed. */
4111 if (n2bits <= type_size && n3bits <= type_size)
4113 if (n2bits == type_size && n2bits > n3bits)
4119 /* Range from 0 to <large number> is an unsigned large integral type. */
4120 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4125 /* Range from <large number> to <large number>-1 is a large signed
4126 integral type. Take care of the case where <large number> doesn't
4127 fit in a long but <large number>-1 does. */
4128 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4129 || (n2bits != 0 && n3bits == 0
4130 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4137 if (got_signed || got_unsigned)
4138 return init_integer_type (objfile, nbits, got_unsigned, NULL);
4140 return error_type (pp, objfile);
4143 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4144 if (self_subrange && n2 == 0 && n3 == 0)
4145 return init_type (objfile, TYPE_CODE_VOID, 1, NULL);
4147 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4148 is the width in bytes.
4150 Fortran programs appear to use this for complex types also. To
4151 distinguish between floats and complex, g77 (and others?) seem
4152 to use self-subranges for the complexes, and subranges of int for
4155 Also note that for complexes, g77 sets n2 to the size of one of
4156 the member floats, not the whole complex beast. My guess is that
4157 this was to work well with pre-COMPLEX versions of gdb. */
4159 if (n3 == 0 && n2 > 0)
4161 struct type *float_type
4162 = dbx_init_float_type (objfile, n2 * TARGET_CHAR_BIT);
4165 return init_complex_type (objfile, NULL, float_type);
4170 /* If the upper bound is -1, it must really be an unsigned integral. */
4172 else if (n2 == 0 && n3 == -1)
4174 int bits = type_size;
4178 /* We don't know its size. It is unsigned int or unsigned
4179 long. GCC 2.3.3 uses this for long long too, but that is
4180 just a GDB 3.5 compatibility hack. */
4181 bits = gdbarch_int_bit (gdbarch);
4184 return init_integer_type (objfile, bits, 1, NULL);
4187 /* Special case: char is defined (Who knows why) as a subrange of
4188 itself with range 0-127. */
4189 else if (self_subrange && n2 == 0 && n3 == 127)
4191 struct type *type = init_integer_type (objfile, 1, 0, NULL);
4192 TYPE_NOSIGN (type) = 1;
4195 /* We used to do this only for subrange of self or subrange of int. */
4198 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4199 "unsigned long", and we already checked for that,
4200 so don't need to test for it here. */
4203 /* n3 actually gives the size. */
4204 return init_integer_type (objfile, -n3 * TARGET_CHAR_BIT, 1, NULL);
4206 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4207 unsigned n-byte integer. But do require n to be a power of
4208 two; we don't want 3- and 5-byte integers flying around. */
4214 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4217 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4218 return init_integer_type (objfile, bytes * TARGET_CHAR_BIT, 1, NULL);
4221 /* I think this is for Convex "long long". Since I don't know whether
4222 Convex sets self_subrange, I also accept that particular size regardless
4223 of self_subrange. */
4224 else if (n3 == 0 && n2 < 0
4226 || n2 == -gdbarch_long_long_bit
4227 (gdbarch) / TARGET_CHAR_BIT))
4228 return init_integer_type (objfile, -n2 * TARGET_CHAR_BIT, 0, NULL);
4229 else if (n2 == -n3 - 1)
4232 return init_integer_type (objfile, 8, 0, NULL);
4234 return init_integer_type (objfile, 16, 0, NULL);
4235 if (n3 == 0x7fffffff)
4236 return init_integer_type (objfile, 32, 0, NULL);
4239 /* We have a real range type on our hands. Allocate space and
4240 return a real pointer. */
4244 index_type = objfile_type (objfile)->builtin_int;
4246 index_type = *dbx_lookup_type (rangenums, objfile);
4247 if (index_type == NULL)
4249 /* Does this actually ever happen? Is that why we are worrying
4250 about dealing with it rather than just calling error_type? */
4252 complaint (&symfile_complaints,
4253 _("base type %d of range type is not defined"), rangenums[1]);
4255 index_type = objfile_type (objfile)->builtin_int;
4259 = create_static_range_type ((struct type *) NULL, index_type, n2, n3);
4260 return (result_type);
4263 /* Read in an argument list. This is a list of types, separated by commas
4264 and terminated with END. Return the list of types read in, or NULL
4265 if there is an error. */
4267 static struct field *
4268 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4271 /* FIXME! Remove this arbitrary limit! */
4272 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4279 /* Invalid argument list: no ','. */
4282 STABS_CONTINUE (pp, objfile);
4283 types[n++] = read_type (pp, objfile);
4285 (*pp)++; /* get past `end' (the ':' character). */
4289 /* We should read at least the THIS parameter here. Some broken stabs
4290 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4291 have been present ";-16,(0,43)" reference instead. This way the
4292 excessive ";" marker prematurely stops the parameters parsing. */
4294 complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
4297 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4305 rval = XCNEWVEC (struct field, n);
4306 for (i = 0; i < n; i++)
4307 rval[i].type = types[i];
4312 /* Common block handling. */
4314 /* List of symbols declared since the last BCOMM. This list is a tail
4315 of local_symbols. When ECOMM is seen, the symbols on the list
4316 are noted so their proper addresses can be filled in later,
4317 using the common block base address gotten from the assembler
4320 static struct pending *common_block;
4321 static int common_block_i;
4323 /* Name of the current common block. We get it from the BCOMM instead of the
4324 ECOMM to match IBM documentation (even though IBM puts the name both places
4325 like everyone else). */
4326 static char *common_block_name;
4328 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4329 to remain after this function returns. */
4332 common_block_start (char *name, struct objfile *objfile)
4334 if (common_block_name != NULL)
4336 complaint (&symfile_complaints,
4337 _("Invalid symbol data: common block within common block"));
4339 common_block = local_symbols;
4340 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4341 common_block_name = (char *) obstack_copy0 (&objfile->objfile_obstack, name,
4345 /* Process a N_ECOMM symbol. */
4348 common_block_end (struct objfile *objfile)
4350 /* Symbols declared since the BCOMM are to have the common block
4351 start address added in when we know it. common_block and
4352 common_block_i point to the first symbol after the BCOMM in
4353 the local_symbols list; copy the list and hang it off the
4354 symbol for the common block name for later fixup. */
4357 struct pending *newobj = 0;
4358 struct pending *next;
4361 if (common_block_name == NULL)
4363 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4367 sym = allocate_symbol (objfile);
4368 /* Note: common_block_name already saved on objfile_obstack. */
4369 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4370 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
4372 /* Now we copy all the symbols which have been defined since the BCOMM. */
4374 /* Copy all the struct pendings before common_block. */
4375 for (next = local_symbols;
4376 next != NULL && next != common_block;
4379 for (j = 0; j < next->nsyms; j++)
4380 add_symbol_to_list (next->symbol[j], &newobj);
4383 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4384 NULL, it means copy all the local symbols (which we already did
4387 if (common_block != NULL)
4388 for (j = common_block_i; j < common_block->nsyms; j++)
4389 add_symbol_to_list (common_block->symbol[j], &newobj);
4391 SYMBOL_TYPE (sym) = (struct type *) newobj;
4393 /* Should we be putting local_symbols back to what it was?
4396 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4397 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4398 global_sym_chain[i] = sym;
4399 common_block_name = NULL;
4402 /* Add a common block's start address to the offset of each symbol
4403 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4404 the common block name). */
4407 fix_common_block (struct symbol *sym, CORE_ADDR valu)
4409 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4411 for (; next; next = next->next)
4415 for (j = next->nsyms - 1; j >= 0; j--)
4416 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4422 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4423 See add_undefined_type for more details. */
4426 add_undefined_type_noname (struct type *type, int typenums[2])
4430 nat.typenums[0] = typenums [0];
4431 nat.typenums[1] = typenums [1];
4434 if (noname_undefs_length == noname_undefs_allocated)
4436 noname_undefs_allocated *= 2;
4437 noname_undefs = (struct nat *)
4438 xrealloc ((char *) noname_undefs,
4439 noname_undefs_allocated * sizeof (struct nat));
4441 noname_undefs[noname_undefs_length++] = nat;
4444 /* Add TYPE to the UNDEF_TYPES vector.
4445 See add_undefined_type for more details. */
4448 add_undefined_type_1 (struct type *type)
4450 if (undef_types_length == undef_types_allocated)
4452 undef_types_allocated *= 2;
4453 undef_types = (struct type **)
4454 xrealloc ((char *) undef_types,
4455 undef_types_allocated * sizeof (struct type *));
4457 undef_types[undef_types_length++] = type;
4460 /* What about types defined as forward references inside of a small lexical
4462 /* Add a type to the list of undefined types to be checked through
4463 once this file has been read in.
4465 In practice, we actually maintain two such lists: The first list
4466 (UNDEF_TYPES) is used for types whose name has been provided, and
4467 concerns forward references (eg 'xs' or 'xu' forward references);
4468 the second list (NONAME_UNDEFS) is used for types whose name is
4469 unknown at creation time, because they were referenced through
4470 their type number before the actual type was declared.
4471 This function actually adds the given type to the proper list. */
4474 add_undefined_type (struct type *type, int typenums[2])
4476 if (TYPE_TAG_NAME (type) == NULL)
4477 add_undefined_type_noname (type, typenums);
4479 add_undefined_type_1 (type);
4482 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4485 cleanup_undefined_types_noname (struct objfile *objfile)
4489 for (i = 0; i < noname_undefs_length; i++)
4491 struct nat nat = noname_undefs[i];
4494 type = dbx_lookup_type (nat.typenums, objfile);
4495 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4497 /* The instance flags of the undefined type are still unset,
4498 and needs to be copied over from the reference type.
4499 Since replace_type expects them to be identical, we need
4500 to set these flags manually before hand. */
4501 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4502 replace_type (nat.type, *type);
4506 noname_undefs_length = 0;
4509 /* Go through each undefined type, see if it's still undefined, and fix it
4510 up if possible. We have two kinds of undefined types:
4512 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4513 Fix: update array length using the element bounds
4514 and the target type's length.
4515 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4516 yet defined at the time a pointer to it was made.
4517 Fix: Do a full lookup on the struct/union tag. */
4520 cleanup_undefined_types_1 (void)
4524 /* Iterate over every undefined type, and look for a symbol whose type
4525 matches our undefined type. The symbol matches if:
4526 1. It is a typedef in the STRUCT domain;
4527 2. It has the same name, and same type code;
4528 3. The instance flags are identical.
4530 It is important to check the instance flags, because we have seen
4531 examples where the debug info contained definitions such as:
4533 "foo_t:t30=B31=xefoo_t:"
4535 In this case, we have created an undefined type named "foo_t" whose
4536 instance flags is null (when processing "xefoo_t"), and then created
4537 another type with the same name, but with different instance flags
4538 ('B' means volatile). I think that the definition above is wrong,
4539 since the same type cannot be volatile and non-volatile at the same
4540 time, but we need to be able to cope with it when it happens. The
4541 approach taken here is to treat these two types as different. */
4543 for (type = undef_types; type < undef_types + undef_types_length; type++)
4545 switch (TYPE_CODE (*type))
4548 case TYPE_CODE_STRUCT:
4549 case TYPE_CODE_UNION:
4550 case TYPE_CODE_ENUM:
4552 /* Check if it has been defined since. Need to do this here
4553 as well as in check_typedef to deal with the (legitimate in
4554 C though not C++) case of several types with the same name
4555 in different source files. */
4556 if (TYPE_STUB (*type))
4558 struct pending *ppt;
4560 /* Name of the type, without "struct" or "union". */
4561 const char *type_name = TYPE_TAG_NAME (*type);
4563 if (type_name == NULL)
4565 complaint (&symfile_complaints, _("need a type name"));
4568 for (ppt = file_symbols; ppt; ppt = ppt->next)
4570 for (i = 0; i < ppt->nsyms; i++)
4572 struct symbol *sym = ppt->symbol[i];
4574 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4575 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4576 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4578 && (TYPE_INSTANCE_FLAGS (*type) ==
4579 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4580 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4582 replace_type (*type, SYMBOL_TYPE (sym));
4591 complaint (&symfile_complaints,
4592 _("forward-referenced types left unresolved, "
4600 undef_types_length = 0;
4603 /* Try to fix all the undefined types we ecountered while processing
4607 cleanup_undefined_stabs_types (struct objfile *objfile)
4609 cleanup_undefined_types_1 ();
4610 cleanup_undefined_types_noname (objfile);
4613 /* Scan through all of the global symbols defined in the object file,
4614 assigning values to the debugging symbols that need to be assigned
4615 to. Get these symbols from the minimal symbol table. */
4618 scan_file_globals (struct objfile *objfile)
4621 struct minimal_symbol *msymbol;
4622 struct symbol *sym, *prev;
4623 struct objfile *resolve_objfile;
4625 /* SVR4 based linkers copy referenced global symbols from shared
4626 libraries to the main executable.
4627 If we are scanning the symbols for a shared library, try to resolve
4628 them from the minimal symbols of the main executable first. */
4630 if (symfile_objfile && objfile != symfile_objfile)
4631 resolve_objfile = symfile_objfile;
4633 resolve_objfile = objfile;
4637 /* Avoid expensive loop through all minimal symbols if there are
4638 no unresolved symbols. */
4639 for (hash = 0; hash < HASHSIZE; hash++)
4641 if (global_sym_chain[hash])
4644 if (hash >= HASHSIZE)
4647 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4651 /* Skip static symbols. */
4652 switch (MSYMBOL_TYPE (msymbol))
4664 /* Get the hash index and check all the symbols
4665 under that hash index. */
4667 hash = hashname (MSYMBOL_LINKAGE_NAME (msymbol));
4669 for (sym = global_sym_chain[hash]; sym;)
4671 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol),
4672 SYMBOL_LINKAGE_NAME (sym)) == 0)
4674 /* Splice this symbol out of the hash chain and
4675 assign the value we have to it. */
4678 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4682 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4685 /* Check to see whether we need to fix up a common block. */
4686 /* Note: this code might be executed several times for
4687 the same symbol if there are multiple references. */
4690 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4692 fix_common_block (sym,
4693 MSYMBOL_VALUE_ADDRESS (resolve_objfile,
4698 SYMBOL_VALUE_ADDRESS (sym)
4699 = MSYMBOL_VALUE_ADDRESS (resolve_objfile, msymbol);
4701 SYMBOL_SECTION (sym) = MSYMBOL_SECTION (msymbol);
4706 sym = SYMBOL_VALUE_CHAIN (prev);
4710 sym = global_sym_chain[hash];
4716 sym = SYMBOL_VALUE_CHAIN (sym);
4720 if (resolve_objfile == objfile)
4722 resolve_objfile = objfile;
4725 /* Change the storage class of any remaining unresolved globals to
4726 LOC_UNRESOLVED and remove them from the chain. */
4727 for (hash = 0; hash < HASHSIZE; hash++)
4729 sym = global_sym_chain[hash];
4733 sym = SYMBOL_VALUE_CHAIN (sym);
4735 /* Change the symbol address from the misleading chain value
4737 SYMBOL_VALUE_ADDRESS (prev) = 0;
4739 /* Complain about unresolved common block symbols. */
4740 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4741 SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
4743 complaint (&symfile_complaints,
4744 _("%s: common block `%s' from "
4745 "global_sym_chain unresolved"),
4746 objfile_name (objfile), SYMBOL_PRINT_NAME (prev));
4749 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4752 /* Initialize anything that needs initializing when starting to read
4753 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4757 stabsread_init (void)
4761 /* Initialize anything that needs initializing when a completely new
4762 symbol file is specified (not just adding some symbols from another
4763 file, e.g. a shared library). */
4766 stabsread_new_init (void)
4768 /* Empty the hash table of global syms looking for values. */
4769 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4772 /* Initialize anything that needs initializing at the same time as
4773 start_symtab() is called. */
4778 global_stabs = NULL; /* AIX COFF */
4779 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4780 n_this_object_header_files = 1;
4781 type_vector_length = 0;
4782 type_vector = (struct type **) 0;
4784 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4785 common_block_name = NULL;
4788 /* Call after end_symtab(). */
4795 xfree (type_vector);
4798 type_vector_length = 0;
4799 previous_stab_code = 0;
4803 finish_global_stabs (struct objfile *objfile)
4807 patch_block_stabs (global_symbols, global_stabs, objfile);
4808 xfree (global_stabs);
4809 global_stabs = NULL;
4813 /* Find the end of the name, delimited by a ':', but don't match
4814 ObjC symbols which look like -[Foo bar::]:bla. */
4816 find_name_end (char *name)
4820 if (s[0] == '-' || *s == '+')
4822 /* Must be an ObjC method symbol. */
4825 error (_("invalid symbol name \"%s\""), name);
4827 s = strchr (s, ']');
4830 error (_("invalid symbol name \"%s\""), name);
4832 return strchr (s, ':');
4836 return strchr (s, ':');
4840 /* Initializer for this module. */
4843 _initialize_stabsread (void)
4845 rs6000_builtin_type_data = register_objfile_data ();
4847 undef_types_allocated = 20;
4848 undef_types_length = 0;
4849 undef_types = XNEWVEC (struct type *, undef_types_allocated);
4851 noname_undefs_allocated = 20;
4852 noname_undefs_length = 0;
4853 noname_undefs = XNEWVEC (struct nat, noname_undefs_allocated);
4855 stab_register_index = register_symbol_register_impl (LOC_REGISTER,
4856 &stab_register_funcs);
4857 stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
4858 &stab_register_funcs);