1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2015 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);
56 /* The routines that read and process a complete stabs for a C struct or
57 C++ class pass lists of data member fields and lists of member function
58 fields in an instance of a field_info structure, as defined below.
59 This is part of some reorganization of low level C++ support and is
60 expected to eventually go away... (FIXME) */
66 struct nextfield *next;
68 /* This is the raw visibility from the stab. It is not checked
69 for being one of the visibilities we recognize, so code which
70 examines this field better be able to deal. */
76 struct next_fnfieldlist
78 struct next_fnfieldlist *next;
79 struct fn_fieldlist fn_fieldlist;
85 read_one_struct_field (struct field_info *, char **, char *,
86 struct type *, struct objfile *);
88 static struct type *dbx_alloc_type (int[2], struct objfile *);
90 static long read_huge_number (char **, int, int *, int);
92 static struct type *error_type (char **, struct objfile *);
95 patch_block_stabs (struct pending *, struct pending_stabs *,
98 static void fix_common_block (struct symbol *, CORE_ADDR);
100 static int read_type_number (char **, int *);
102 static struct type *read_type (char **, struct objfile *);
104 static struct type *read_range_type (char **, int[2], int, struct objfile *);
106 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
108 static struct type *read_sun_floating_type (char **, int[2],
111 static struct type *read_enum_type (char **, struct type *, struct objfile *);
113 static struct type *rs6000_builtin_type (int, struct objfile *);
116 read_member_functions (struct field_info *, char **, struct type *,
120 read_struct_fields (struct field_info *, char **, struct type *,
124 read_baseclasses (struct field_info *, char **, struct type *,
128 read_tilde_fields (struct field_info *, char **, struct type *,
131 static int attach_fn_fields_to_type (struct field_info *, struct type *);
133 static int attach_fields_to_type (struct field_info *, struct type *,
136 static struct type *read_struct_type (char **, struct type *,
140 static struct type *read_array_type (char **, struct type *,
143 static struct field *read_args (char **, int, struct objfile *, int *, int *);
145 static void add_undefined_type (struct type *, int[2]);
148 read_cpp_abbrev (struct field_info *, char **, struct type *,
151 static char *find_name_end (char *name);
153 static int process_reference (char **string);
155 void stabsread_clear_cache (void);
157 static const char vptr_name[] = "_vptr$";
158 static const char vb_name[] = "_vb$";
161 invalid_cpp_abbrev_complaint (const char *arg1)
163 complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
167 reg_value_complaint (int regnum, int num_regs, const char *sym)
169 complaint (&symfile_complaints,
170 _("register number %d too large (max %d) in symbol %s"),
171 regnum, num_regs - 1, sym);
175 stabs_general_complaint (const char *arg1)
177 complaint (&symfile_complaints, "%s", arg1);
180 /* Make a list of forward references which haven't been defined. */
182 static struct type **undef_types;
183 static int undef_types_allocated;
184 static int undef_types_length;
185 static struct symbol *current_symbol = NULL;
187 /* Make a list of nameless types that are undefined.
188 This happens when another type is referenced by its number
189 before this type is actually defined. For instance "t(0,1)=k(0,2)"
190 and type (0,2) is defined only later. */
197 static struct nat *noname_undefs;
198 static int noname_undefs_allocated;
199 static int noname_undefs_length;
201 /* Check for and handle cretinous stabs symbol name continuation! */
202 #define STABS_CONTINUE(pp,objfile) \
204 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
205 *(pp) = next_symbol_text (objfile); \
208 /* Vector of types defined so far, indexed by their type numbers.
209 (In newer sun systems, dbx uses a pair of numbers in parens,
210 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
211 Then these numbers must be translated through the type_translations
212 hash table to get the index into the type vector.) */
214 static struct type **type_vector;
216 /* Number of elements allocated for type_vector currently. */
218 static int type_vector_length;
220 /* Initial size of type vector. Is realloc'd larger if needed, and
221 realloc'd down to the size actually used, when completed. */
223 #define INITIAL_TYPE_VECTOR_LENGTH 160
226 /* Look up a dbx type-number pair. Return the address of the slot
227 where the type for that number-pair is stored.
228 The number-pair is in TYPENUMS.
230 This can be used for finding the type associated with that pair
231 or for associating a new type with the pair. */
233 static struct type **
234 dbx_lookup_type (int typenums[2], struct objfile *objfile)
236 int filenum = typenums[0];
237 int index = typenums[1];
240 struct header_file *f;
243 if (filenum == -1) /* -1,-1 is for temporary types. */
246 if (filenum < 0 || filenum >= n_this_object_header_files)
248 complaint (&symfile_complaints,
249 _("Invalid symbol data: type number "
250 "(%d,%d) out of range at symtab pos %d."),
251 filenum, index, symnum);
259 /* Caller wants address of address of type. We think
260 that negative (rs6k builtin) types will never appear as
261 "lvalues", (nor should they), so we stuff the real type
262 pointer into a temp, and return its address. If referenced,
263 this will do the right thing. */
264 static struct type *temp_type;
266 temp_type = rs6000_builtin_type (index, objfile);
270 /* Type is defined outside of header files.
271 Find it in this object file's type vector. */
272 if (index >= type_vector_length)
274 old_len = type_vector_length;
277 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
278 type_vector = (struct type **)
279 xmalloc (type_vector_length * sizeof (struct type *));
281 while (index >= type_vector_length)
283 type_vector_length *= 2;
285 type_vector = (struct type **)
286 xrealloc ((char *) type_vector,
287 (type_vector_length * sizeof (struct type *)));
288 memset (&type_vector[old_len], 0,
289 (type_vector_length - old_len) * sizeof (struct type *));
291 return (&type_vector[index]);
295 real_filenum = this_object_header_files[filenum];
297 if (real_filenum >= N_HEADER_FILES (objfile))
299 static struct type *temp_type;
301 warning (_("GDB internal error: bad real_filenum"));
304 temp_type = objfile_type (objfile)->builtin_error;
308 f = HEADER_FILES (objfile) + real_filenum;
310 f_orig_length = f->length;
311 if (index >= f_orig_length)
313 while (index >= f->length)
317 f->vector = (struct type **)
318 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
319 memset (&f->vector[f_orig_length], 0,
320 (f->length - f_orig_length) * sizeof (struct type *));
322 return (&f->vector[index]);
326 /* Make sure there is a type allocated for type numbers TYPENUMS
327 and return the type object.
328 This can create an empty (zeroed) type object.
329 TYPENUMS may be (-1, -1) to return a new type object that is not
330 put into the type vector, and so may not be referred to by number. */
333 dbx_alloc_type (int typenums[2], struct objfile *objfile)
335 struct type **type_addr;
337 if (typenums[0] == -1)
339 return (alloc_type (objfile));
342 type_addr = dbx_lookup_type (typenums, objfile);
344 /* If we are referring to a type not known at all yet,
345 allocate an empty type for it.
346 We will fill it in later if we find out how. */
349 *type_addr = alloc_type (objfile);
355 /* for all the stabs in a given stab vector, build appropriate types
356 and fix their symbols in given symbol vector. */
359 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
360 struct objfile *objfile)
369 /* for all the stab entries, find their corresponding symbols and
370 patch their types! */
372 for (ii = 0; ii < stabs->count; ++ii)
374 name = stabs->stab[ii];
375 pp = (char *) strchr (name, ':');
376 gdb_assert (pp); /* Must find a ':' or game's over. */
380 pp = (char *) strchr (pp, ':');
382 sym = find_symbol_in_list (symbols, name, pp - name);
385 /* FIXME-maybe: it would be nice if we noticed whether
386 the variable was defined *anywhere*, not just whether
387 it is defined in this compilation unit. But neither
388 xlc or GCC seem to need such a definition, and until
389 we do psymtabs (so that the minimal symbols from all
390 compilation units are available now), I'm not sure
391 how to get the information. */
393 /* On xcoff, if a global is defined and never referenced,
394 ld will remove it from the executable. There is then
395 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
396 sym = allocate_symbol (objfile);
397 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
398 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
399 SYMBOL_SET_LINKAGE_NAME
400 (sym, obstack_copy0 (&objfile->objfile_obstack,
403 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
405 /* I don't think the linker does this with functions,
406 so as far as I know this is never executed.
407 But it doesn't hurt to check. */
409 lookup_function_type (read_type (&pp, objfile));
413 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
415 add_symbol_to_list (sym, &global_symbols);
420 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
423 lookup_function_type (read_type (&pp, objfile));
427 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
435 /* Read a number by which a type is referred to in dbx data,
436 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
437 Just a single number N is equivalent to (0,N).
438 Return the two numbers by storing them in the vector TYPENUMS.
439 TYPENUMS will then be used as an argument to dbx_lookup_type.
441 Returns 0 for success, -1 for error. */
444 read_type_number (char **pp, int *typenums)
451 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
454 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
461 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
469 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
470 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
471 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
472 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
474 /* Structure for storing pointers to reference definitions for fast lookup
475 during "process_later". */
484 #define MAX_CHUNK_REFS 100
485 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
486 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
488 static struct ref_map *ref_map;
490 /* Ptr to free cell in chunk's linked list. */
491 static int ref_count = 0;
493 /* Number of chunks malloced. */
494 static int ref_chunk = 0;
496 /* This file maintains a cache of stabs aliases found in the symbol
497 table. If the symbol table changes, this cache must be cleared
498 or we are left holding onto data in invalid obstacks. */
500 stabsread_clear_cache (void)
506 /* Create array of pointers mapping refids to symbols and stab strings.
507 Add pointers to reference definition symbols and/or their values as we
508 find them, using their reference numbers as our index.
509 These will be used later when we resolve references. */
511 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
515 if (refnum >= ref_count)
516 ref_count = refnum + 1;
517 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
519 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
520 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
522 ref_map = (struct ref_map *)
523 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
524 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
525 new_chunks * REF_CHUNK_SIZE);
526 ref_chunk += new_chunks;
528 ref_map[refnum].stabs = stabs;
529 ref_map[refnum].sym = sym;
530 ref_map[refnum].value = value;
533 /* Return defined sym for the reference REFNUM. */
535 ref_search (int refnum)
537 if (refnum < 0 || refnum > ref_count)
539 return ref_map[refnum].sym;
542 /* Parse a reference id in STRING and return the resulting
543 reference number. Move STRING beyond the reference id. */
546 process_reference (char **string)
554 /* Advance beyond the initial '#'. */
557 /* Read number as reference id. */
558 while (*p && isdigit (*p))
560 refnum = refnum * 10 + *p - '0';
567 /* If STRING defines a reference, store away a pointer to the reference
568 definition for later use. Return the reference number. */
571 symbol_reference_defined (char **string)
576 refnum = process_reference (&p);
578 /* Defining symbols end in '='. */
581 /* Symbol is being defined here. */
587 /* Must be a reference. Either the symbol has already been defined,
588 or this is a forward reference to it. */
595 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
597 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
599 if (regno >= gdbarch_num_regs (gdbarch)
600 + gdbarch_num_pseudo_regs (gdbarch))
602 reg_value_complaint (regno,
603 gdbarch_num_regs (gdbarch)
604 + gdbarch_num_pseudo_regs (gdbarch),
605 SYMBOL_PRINT_NAME (sym));
607 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless. */
613 static const struct symbol_register_ops stab_register_funcs = {
617 /* The "aclass" indices for computed symbols. */
619 static int stab_register_index;
620 static int stab_regparm_index;
623 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
624 struct objfile *objfile)
626 struct gdbarch *gdbarch = get_objfile_arch (objfile);
628 char *p = (char *) find_name_end (string);
632 char *new_name = NULL;
634 /* We would like to eliminate nameless symbols, but keep their types.
635 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
636 to type 2, but, should not create a symbol to address that type. Since
637 the symbol will be nameless, there is no way any user can refer to it. */
641 /* Ignore syms with empty names. */
645 /* Ignore old-style symbols from cc -go. */
655 complaint (&symfile_complaints,
656 _("Bad stabs string '%s'"), string);
661 /* If a nameless stab entry, all we need is the type, not the symbol.
662 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
663 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
665 current_symbol = sym = allocate_symbol (objfile);
667 if (processing_gcc_compilation)
669 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
670 number of bytes occupied by a type or object, which we ignore. */
671 SYMBOL_LINE (sym) = desc;
675 SYMBOL_LINE (sym) = 0; /* unknown */
678 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
679 &objfile->objfile_obstack);
681 if (is_cplus_marker (string[0]))
683 /* Special GNU C++ names. */
687 SYMBOL_SET_LINKAGE_NAME (sym, "this");
690 case 'v': /* $vtbl_ptr_type */
694 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
698 /* This was an anonymous type that was never fixed up. */
702 /* SunPRO (3.0 at least) static variable encoding. */
703 if (gdbarch_static_transform_name_p (gdbarch))
705 /* ... fall through ... */
708 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
710 goto normal; /* Do *something* with it. */
716 if (SYMBOL_LANGUAGE (sym) == language_cplus)
718 char *name = alloca (p - string + 1);
720 memcpy (name, string, p - string);
721 name[p - string] = '\0';
722 new_name = cp_canonicalize_string (name);
724 if (new_name != NULL)
726 SYMBOL_SET_NAMES (sym, new_name, strlen (new_name), 1, objfile);
730 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
732 if (SYMBOL_LANGUAGE (sym) == language_cplus)
733 cp_scan_for_anonymous_namespaces (sym, objfile);
738 /* Determine the type of name being defined. */
740 /* Getting GDB to correctly skip the symbol on an undefined symbol
741 descriptor and not ever dump core is a very dodgy proposition if
742 we do things this way. I say the acorn RISC machine can just
743 fix their compiler. */
744 /* The Acorn RISC machine's compiler can put out locals that don't
745 start with "234=" or "(3,4)=", so assume anything other than the
746 deftypes we know how to handle is a local. */
747 if (!strchr ("cfFGpPrStTvVXCR", *p))
749 if (isdigit (*p) || *p == '(' || *p == '-')
758 /* c is a special case, not followed by a type-number.
759 SYMBOL:c=iVALUE for an integer constant symbol.
760 SYMBOL:c=rVALUE for a floating constant symbol.
761 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
762 e.g. "b:c=e6,0" for "const b = blob1"
763 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
766 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
767 SYMBOL_TYPE (sym) = error_type (&p, objfile);
768 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
769 add_symbol_to_list (sym, &file_symbols);
779 struct type *dbl_type;
781 /* FIXME-if-picky-about-floating-accuracy: Should be using
782 target arithmetic to get the value. real.c in GCC
783 probably has the necessary code. */
785 dbl_type = objfile_type (objfile)->builtin_double;
787 obstack_alloc (&objfile->objfile_obstack,
788 TYPE_LENGTH (dbl_type));
789 store_typed_floating (dbl_valu, dbl_type, d);
791 SYMBOL_TYPE (sym) = dbl_type;
792 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
793 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
798 /* Defining integer constants this way is kind of silly,
799 since 'e' constants allows the compiler to give not
800 only the value, but the type as well. C has at least
801 int, long, unsigned int, and long long as constant
802 types; other languages probably should have at least
803 unsigned as well as signed constants. */
805 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
806 SYMBOL_VALUE (sym) = atoi (p);
807 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
813 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
814 SYMBOL_VALUE (sym) = atoi (p);
815 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
821 struct type *range_type;
824 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
825 gdb_byte *string_value;
827 if (quote != '\'' && quote != '"')
829 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
830 SYMBOL_TYPE (sym) = error_type (&p, objfile);
831 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
832 add_symbol_to_list (sym, &file_symbols);
836 /* Find matching quote, rejecting escaped quotes. */
837 while (*p && *p != quote)
839 if (*p == '\\' && p[1] == quote)
841 string_local[ind] = (gdb_byte) quote;
847 string_local[ind] = (gdb_byte) (*p);
854 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
855 SYMBOL_TYPE (sym) = error_type (&p, objfile);
856 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
857 add_symbol_to_list (sym, &file_symbols);
861 /* NULL terminate the string. */
862 string_local[ind] = 0;
864 = create_static_range_type (NULL,
865 objfile_type (objfile)->builtin_int,
867 SYMBOL_TYPE (sym) = create_array_type (NULL,
868 objfile_type (objfile)->builtin_char,
870 string_value = obstack_alloc (&objfile->objfile_obstack, ind + 1);
871 memcpy (string_value, string_local, ind + 1);
874 SYMBOL_VALUE_BYTES (sym) = string_value;
875 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
880 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
881 can be represented as integral.
882 e.g. "b:c=e6,0" for "const b = blob1"
883 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
885 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
886 SYMBOL_TYPE (sym) = read_type (&p, objfile);
890 SYMBOL_TYPE (sym) = error_type (&p, objfile);
895 /* If the value is too big to fit in an int (perhaps because
896 it is unsigned), or something like that, we silently get
897 a bogus value. The type and everything else about it is
898 correct. Ideally, we should be using whatever we have
899 available for parsing unsigned and long long values,
901 SYMBOL_VALUE (sym) = atoi (p);
906 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
907 SYMBOL_TYPE (sym) = error_type (&p, objfile);
910 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
911 add_symbol_to_list (sym, &file_symbols);
915 /* The name of a caught exception. */
916 SYMBOL_TYPE (sym) = read_type (&p, objfile);
917 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
918 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
919 SYMBOL_VALUE_ADDRESS (sym) = valu;
920 add_symbol_to_list (sym, &local_symbols);
924 /* A static function definition. */
925 SYMBOL_TYPE (sym) = read_type (&p, objfile);
926 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
927 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
928 add_symbol_to_list (sym, &file_symbols);
929 /* fall into process_function_types. */
931 process_function_types:
932 /* Function result types are described as the result type in stabs.
933 We need to convert this to the function-returning-type-X type
934 in GDB. E.g. "int" is converted to "function returning int". */
935 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
936 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
938 /* All functions in C++ have prototypes. Stabs does not offer an
939 explicit way to identify prototyped or unprototyped functions,
940 but both GCC and Sun CC emit stabs for the "call-as" type rather
941 than the "declared-as" type for unprototyped functions, so
942 we treat all functions as if they were prototyped. This is used
943 primarily for promotion when calling the function from GDB. */
944 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
946 /* fall into process_prototype_types. */
948 process_prototype_types:
949 /* Sun acc puts declared types of arguments here. */
952 struct type *ftype = SYMBOL_TYPE (sym);
957 /* Obtain a worst case guess for the number of arguments
958 by counting the semicolons. */
965 /* Allocate parameter information fields and fill them in. */
966 TYPE_FIELDS (ftype) = (struct field *)
967 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
972 /* A type number of zero indicates the start of varargs.
973 FIXME: GDB currently ignores vararg functions. */
974 if (p[0] == '0' && p[1] == '\0')
976 ptype = read_type (&p, objfile);
978 /* The Sun compilers mark integer arguments, which should
979 be promoted to the width of the calling conventions, with
980 a type which references itself. This type is turned into
981 a TYPE_CODE_VOID type by read_type, and we have to turn
982 it back into builtin_int here.
983 FIXME: Do we need a new builtin_promoted_int_arg ? */
984 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
985 ptype = objfile_type (objfile)->builtin_int;
986 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
987 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
989 TYPE_NFIELDS (ftype) = nparams;
990 TYPE_PROTOTYPED (ftype) = 1;
995 /* A global function definition. */
996 SYMBOL_TYPE (sym) = read_type (&p, objfile);
997 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
998 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
999 add_symbol_to_list (sym, &global_symbols);
1000 goto process_function_types;
1003 /* For a class G (global) symbol, it appears that the
1004 value is not correct. It is necessary to search for the
1005 corresponding linker definition to find the value.
1006 These definitions appear at the end of the namelist. */
1007 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1008 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1009 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1010 /* Don't add symbol references to global_sym_chain.
1011 Symbol references don't have valid names and wont't match up with
1012 minimal symbols when the global_sym_chain is relocated.
1013 We'll fixup symbol references when we fixup the defining symbol. */
1014 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1016 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1017 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1018 global_sym_chain[i] = sym;
1020 add_symbol_to_list (sym, &global_symbols);
1023 /* This case is faked by a conditional above,
1024 when there is no code letter in the dbx data.
1025 Dbx data never actually contains 'l'. */
1028 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1029 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1030 SYMBOL_VALUE (sym) = valu;
1031 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1032 add_symbol_to_list (sym, &local_symbols);
1037 /* pF is a two-letter code that means a function parameter in Fortran.
1038 The type-number specifies the type of the return value.
1039 Translate it into a pointer-to-function type. */
1043 = lookup_pointer_type
1044 (lookup_function_type (read_type (&p, objfile)));
1047 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1049 SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
1050 SYMBOL_VALUE (sym) = valu;
1051 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1052 SYMBOL_IS_ARGUMENT (sym) = 1;
1053 add_symbol_to_list (sym, &local_symbols);
1055 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1057 /* On little-endian machines, this crud is never necessary,
1058 and, if the extra bytes contain garbage, is harmful. */
1062 /* If it's gcc-compiled, if it says `short', believe it. */
1063 if (processing_gcc_compilation
1064 || gdbarch_believe_pcc_promotion (gdbarch))
1067 if (!gdbarch_believe_pcc_promotion (gdbarch))
1069 /* If PCC says a parameter is a short or a char, it is
1071 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1072 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1073 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1076 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1077 ? objfile_type (objfile)->builtin_unsigned_int
1078 : objfile_type (objfile)->builtin_int;
1084 /* acc seems to use P to declare the prototypes of functions that
1085 are referenced by this file. gdb is not prepared to deal
1086 with this extra information. FIXME, it ought to. */
1089 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1090 goto process_prototype_types;
1095 /* Parameter which is in a register. */
1096 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1097 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1098 SYMBOL_IS_ARGUMENT (sym) = 1;
1099 SYMBOL_VALUE (sym) = valu;
1100 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1101 add_symbol_to_list (sym, &local_symbols);
1105 /* Register variable (either global or local). */
1106 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1107 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1108 SYMBOL_VALUE (sym) = valu;
1109 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1110 if (within_function)
1112 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1113 the same name to represent an argument passed in a
1114 register. GCC uses 'P' for the same case. So if we find
1115 such a symbol pair we combine it into one 'P' symbol.
1116 For Sun cc we need to do this regardless of
1117 stabs_argument_has_addr, because the compiler puts out
1118 the 'p' symbol even if it never saves the argument onto
1121 On most machines, we want to preserve both symbols, so
1122 that we can still get information about what is going on
1123 with the stack (VAX for computing args_printed, using
1124 stack slots instead of saved registers in backtraces,
1127 Note that this code illegally combines
1128 main(argc) struct foo argc; { register struct foo argc; }
1129 but this case is considered pathological and causes a warning
1130 from a decent compiler. */
1133 && local_symbols->nsyms > 0
1134 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1136 struct symbol *prev_sym;
1138 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1139 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1140 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1141 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1142 SYMBOL_LINKAGE_NAME (sym)) == 0)
1144 SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
1145 /* Use the type from the LOC_REGISTER; that is the type
1146 that is actually in that register. */
1147 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1148 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1153 add_symbol_to_list (sym, &local_symbols);
1156 add_symbol_to_list (sym, &file_symbols);
1160 /* Static symbol at top level of file. */
1161 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1162 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1163 SYMBOL_VALUE_ADDRESS (sym) = valu;
1164 if (gdbarch_static_transform_name_p (gdbarch)
1165 && gdbarch_static_transform_name (gdbarch,
1166 SYMBOL_LINKAGE_NAME (sym))
1167 != SYMBOL_LINKAGE_NAME (sym))
1169 struct bound_minimal_symbol msym;
1171 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1173 if (msym.minsym != NULL)
1175 const char *new_name = gdbarch_static_transform_name
1176 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1178 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1179 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1182 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1183 add_symbol_to_list (sym, &file_symbols);
1187 /* In Ada, there is no distinction between typedef and non-typedef;
1188 any type declaration implicitly has the equivalent of a typedef,
1189 and thus 't' is in fact equivalent to 'Tt'.
1191 Therefore, for Ada units, we check the character immediately
1192 before the 't', and if we do not find a 'T', then make sure to
1193 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1194 will be stored in the VAR_DOMAIN). If the symbol was indeed
1195 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1196 elsewhere, so we don't need to take care of that.
1198 This is important to do, because of forward references:
1199 The cleanup of undefined types stored in undef_types only uses
1200 STRUCT_DOMAIN symbols to perform the replacement. */
1201 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1204 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1206 /* For a nameless type, we don't want a create a symbol, thus we
1207 did not use `sym'. Return without further processing. */
1211 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1212 SYMBOL_VALUE (sym) = valu;
1213 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1214 /* C++ vagaries: we may have a type which is derived from
1215 a base type which did not have its name defined when the
1216 derived class was output. We fill in the derived class's
1217 base part member's name here in that case. */
1218 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1219 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1220 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1221 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1225 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1226 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1227 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1228 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1231 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1233 /* gcc-2.6 or later (when using -fvtable-thunks)
1234 emits a unique named type for a vtable entry.
1235 Some gdb code depends on that specific name. */
1236 extern const char vtbl_ptr_name[];
1238 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1239 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1240 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1242 /* If we are giving a name to a type such as "pointer to
1243 foo" or "function returning foo", we better not set
1244 the TYPE_NAME. If the program contains "typedef char
1245 *caddr_t;", we don't want all variables of type char
1246 * to print as caddr_t. This is not just a
1247 consequence of GDB's type management; PCC and GCC (at
1248 least through version 2.4) both output variables of
1249 either type char * or caddr_t with the type number
1250 defined in the 't' symbol for caddr_t. If a future
1251 compiler cleans this up it GDB is not ready for it
1252 yet, but if it becomes ready we somehow need to
1253 disable this check (without breaking the PCC/GCC2.4
1258 Fortunately, this check seems not to be necessary
1259 for anything except pointers or functions. */
1260 /* ezannoni: 2000-10-26. This seems to apply for
1261 versions of gcc older than 2.8. This was the original
1262 problem: with the following code gdb would tell that
1263 the type for name1 is caddr_t, and func is char().
1265 typedef char *caddr_t;
1277 /* Pascal accepts names for pointer types. */
1278 if (current_subfile->language == language_pascal)
1280 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1284 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1287 add_symbol_to_list (sym, &file_symbols);
1291 /* Create the STRUCT_DOMAIN clone. */
1292 struct symbol *struct_sym = allocate_symbol (objfile);
1295 SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
1296 SYMBOL_VALUE (struct_sym) = valu;
1297 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1298 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1299 TYPE_NAME (SYMBOL_TYPE (sym))
1300 = obconcat (&objfile->objfile_obstack,
1301 SYMBOL_LINKAGE_NAME (sym),
1303 add_symbol_to_list (struct_sym, &file_symbols);
1309 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1310 by 't' which means we are typedef'ing it as well. */
1311 synonym = *p == 't';
1316 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1318 /* For a nameless type, we don't want a create a symbol, thus we
1319 did not use `sym'. Return without further processing. */
1323 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1324 SYMBOL_VALUE (sym) = valu;
1325 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1326 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1327 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1328 = obconcat (&objfile->objfile_obstack,
1329 SYMBOL_LINKAGE_NAME (sym),
1331 add_symbol_to_list (sym, &file_symbols);
1335 /* Clone the sym and then modify it. */
1336 struct symbol *typedef_sym = allocate_symbol (objfile);
1338 *typedef_sym = *sym;
1339 SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
1340 SYMBOL_VALUE (typedef_sym) = valu;
1341 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1342 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1343 TYPE_NAME (SYMBOL_TYPE (sym))
1344 = obconcat (&objfile->objfile_obstack,
1345 SYMBOL_LINKAGE_NAME (sym),
1347 add_symbol_to_list (typedef_sym, &file_symbols);
1352 /* Static symbol of local scope. */
1353 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1354 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1355 SYMBOL_VALUE_ADDRESS (sym) = valu;
1356 if (gdbarch_static_transform_name_p (gdbarch)
1357 && gdbarch_static_transform_name (gdbarch,
1358 SYMBOL_LINKAGE_NAME (sym))
1359 != SYMBOL_LINKAGE_NAME (sym))
1361 struct bound_minimal_symbol msym;
1363 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1365 if (msym.minsym != NULL)
1367 const char *new_name = gdbarch_static_transform_name
1368 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1370 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1371 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1374 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1375 add_symbol_to_list (sym, &local_symbols);
1379 /* Reference parameter */
1380 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1381 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1382 SYMBOL_IS_ARGUMENT (sym) = 1;
1383 SYMBOL_VALUE (sym) = valu;
1384 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1385 add_symbol_to_list (sym, &local_symbols);
1389 /* Reference parameter which is in a register. */
1390 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1391 SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
1392 SYMBOL_IS_ARGUMENT (sym) = 1;
1393 SYMBOL_VALUE (sym) = valu;
1394 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1395 add_symbol_to_list (sym, &local_symbols);
1399 /* This is used by Sun FORTRAN for "function result value".
1400 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1401 that Pascal uses it too, but when I tried it Pascal used
1402 "x:3" (local symbol) instead. */
1403 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1404 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1405 SYMBOL_VALUE (sym) = valu;
1406 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1407 add_symbol_to_list (sym, &local_symbols);
1411 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1412 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
1413 SYMBOL_VALUE (sym) = 0;
1414 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1415 add_symbol_to_list (sym, &file_symbols);
1419 /* Some systems pass variables of certain types by reference instead
1420 of by value, i.e. they will pass the address of a structure (in a
1421 register or on the stack) instead of the structure itself. */
1423 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1424 && SYMBOL_IS_ARGUMENT (sym))
1426 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1427 variables passed in a register). */
1428 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1429 SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
1430 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1431 and subsequent arguments on SPARC, for example). */
1432 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1433 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1439 /* Skip rest of this symbol and return an error type.
1441 General notes on error recovery: error_type always skips to the
1442 end of the symbol (modulo cretinous dbx symbol name continuation).
1443 Thus code like this:
1445 if (*(*pp)++ != ';')
1446 return error_type (pp, objfile);
1448 is wrong because if *pp starts out pointing at '\0' (typically as the
1449 result of an earlier error), it will be incremented to point to the
1450 start of the next symbol, which might produce strange results, at least
1451 if you run off the end of the string table. Instead use
1454 return error_type (pp, objfile);
1460 foo = error_type (pp, objfile);
1464 And in case it isn't obvious, the point of all this hair is so the compiler
1465 can define new types and new syntaxes, and old versions of the
1466 debugger will be able to read the new symbol tables. */
1468 static struct type *
1469 error_type (char **pp, struct objfile *objfile)
1471 complaint (&symfile_complaints,
1472 _("couldn't parse type; debugger out of date?"));
1475 /* Skip to end of symbol. */
1476 while (**pp != '\0')
1481 /* Check for and handle cretinous dbx symbol name continuation! */
1482 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1484 *pp = next_symbol_text (objfile);
1491 return objfile_type (objfile)->builtin_error;
1495 /* Read type information or a type definition; return the type. Even
1496 though this routine accepts either type information or a type
1497 definition, the distinction is relevant--some parts of stabsread.c
1498 assume that type information starts with a digit, '-', or '(' in
1499 deciding whether to call read_type. */
1501 static struct type *
1502 read_type (char **pp, struct objfile *objfile)
1504 struct type *type = 0;
1507 char type_descriptor;
1509 /* Size in bits of type if specified by a type attribute, or -1 if
1510 there is no size attribute. */
1513 /* Used to distinguish string and bitstring from char-array and set. */
1516 /* Used to distinguish vector from array. */
1519 /* Read type number if present. The type number may be omitted.
1520 for instance in a two-dimensional array declared with type
1521 "ar1;1;10;ar1;1;10;4". */
1522 if ((**pp >= '0' && **pp <= '9')
1526 if (read_type_number (pp, typenums) != 0)
1527 return error_type (pp, objfile);
1531 /* Type is not being defined here. Either it already
1532 exists, or this is a forward reference to it.
1533 dbx_alloc_type handles both cases. */
1534 type = dbx_alloc_type (typenums, objfile);
1536 /* If this is a forward reference, arrange to complain if it
1537 doesn't get patched up by the time we're done
1539 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1540 add_undefined_type (type, typenums);
1545 /* Type is being defined here. */
1547 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1552 /* 'typenums=' not present, type is anonymous. Read and return
1553 the definition, but don't put it in the type vector. */
1554 typenums[0] = typenums[1] = -1;
1559 type_descriptor = (*pp)[-1];
1560 switch (type_descriptor)
1564 enum type_code code;
1566 /* Used to index through file_symbols. */
1567 struct pending *ppt;
1570 /* Name including "struct", etc. */
1574 char *from, *to, *p, *q1, *q2;
1576 /* Set the type code according to the following letter. */
1580 code = TYPE_CODE_STRUCT;
1583 code = TYPE_CODE_UNION;
1586 code = TYPE_CODE_ENUM;
1590 /* Complain and keep going, so compilers can invent new
1591 cross-reference types. */
1592 complaint (&symfile_complaints,
1593 _("Unrecognized cross-reference type `%c'"),
1595 code = TYPE_CODE_STRUCT;
1600 q1 = strchr (*pp, '<');
1601 p = strchr (*pp, ':');
1603 return error_type (pp, objfile);
1604 if (q1 && p > q1 && p[1] == ':')
1606 int nesting_level = 0;
1608 for (q2 = q1; *q2; q2++)
1612 else if (*q2 == '>')
1614 else if (*q2 == ':' && nesting_level == 0)
1619 return error_type (pp, objfile);
1622 if (current_subfile->language == language_cplus)
1624 char *new_name, *name = alloca (p - *pp + 1);
1626 memcpy (name, *pp, p - *pp);
1627 name[p - *pp] = '\0';
1628 new_name = cp_canonicalize_string (name);
1629 if (new_name != NULL)
1631 type_name = obstack_copy0 (&objfile->objfile_obstack,
1632 new_name, strlen (new_name));
1636 if (type_name == NULL)
1638 to = type_name = (char *)
1639 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1641 /* Copy the name. */
1648 /* Set the pointer ahead of the name which we just read, and
1653 /* If this type has already been declared, then reuse the same
1654 type, rather than allocating a new one. This saves some
1657 for (ppt = file_symbols; ppt; ppt = ppt->next)
1658 for (i = 0; i < ppt->nsyms; i++)
1660 struct symbol *sym = ppt->symbol[i];
1662 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1663 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1664 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1665 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1667 obstack_free (&objfile->objfile_obstack, type_name);
1668 type = SYMBOL_TYPE (sym);
1669 if (typenums[0] != -1)
1670 *dbx_lookup_type (typenums, objfile) = type;
1675 /* Didn't find the type to which this refers, so we must
1676 be dealing with a forward reference. Allocate a type
1677 structure for it, and keep track of it so we can
1678 fill in the rest of the fields when we get the full
1680 type = dbx_alloc_type (typenums, objfile);
1681 TYPE_CODE (type) = code;
1682 TYPE_TAG_NAME (type) = type_name;
1683 INIT_CPLUS_SPECIFIC (type);
1684 TYPE_STUB (type) = 1;
1686 add_undefined_type (type, typenums);
1690 case '-': /* RS/6000 built-in type */
1704 /* We deal with something like t(1,2)=(3,4)=... which
1705 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1707 /* Allocate and enter the typedef type first.
1708 This handles recursive types. */
1709 type = dbx_alloc_type (typenums, objfile);
1710 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1712 struct type *xtype = read_type (pp, objfile);
1716 /* It's being defined as itself. That means it is "void". */
1717 TYPE_CODE (type) = TYPE_CODE_VOID;
1718 TYPE_LENGTH (type) = 1;
1720 else if (type_size >= 0 || is_string)
1722 /* This is the absolute wrong way to construct types. Every
1723 other debug format has found a way around this problem and
1724 the related problems with unnecessarily stubbed types;
1725 someone motivated should attempt to clean up the issue
1726 here as well. Once a type pointed to has been created it
1727 should not be modified.
1729 Well, it's not *absolutely* wrong. Constructing recursive
1730 types (trees, linked lists) necessarily entails modifying
1731 types after creating them. Constructing any loop structure
1732 entails side effects. The Dwarf 2 reader does handle this
1733 more gracefully (it never constructs more than once
1734 instance of a type object, so it doesn't have to copy type
1735 objects wholesale), but it still mutates type objects after
1736 other folks have references to them.
1738 Keep in mind that this circularity/mutation issue shows up
1739 at the source language level, too: C's "incomplete types",
1740 for example. So the proper cleanup, I think, would be to
1741 limit GDB's type smashing to match exactly those required
1742 by the source language. So GDB could have a
1743 "complete_this_type" function, but never create unnecessary
1744 copies of a type otherwise. */
1745 replace_type (type, xtype);
1746 TYPE_NAME (type) = NULL;
1747 TYPE_TAG_NAME (type) = NULL;
1751 TYPE_TARGET_STUB (type) = 1;
1752 TYPE_TARGET_TYPE (type) = xtype;
1757 /* In the following types, we must be sure to overwrite any existing
1758 type that the typenums refer to, rather than allocating a new one
1759 and making the typenums point to the new one. This is because there
1760 may already be pointers to the existing type (if it had been
1761 forward-referenced), and we must change it to a pointer, function,
1762 reference, or whatever, *in-place*. */
1764 case '*': /* Pointer to another type */
1765 type1 = read_type (pp, objfile);
1766 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1769 case '&': /* Reference to another type */
1770 type1 = read_type (pp, objfile);
1771 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
1774 case 'f': /* Function returning another type */
1775 type1 = read_type (pp, objfile);
1776 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1779 case 'g': /* Prototyped function. (Sun) */
1781 /* Unresolved questions:
1783 - According to Sun's ``STABS Interface Manual'', for 'f'
1784 and 'F' symbol descriptors, a `0' in the argument type list
1785 indicates a varargs function. But it doesn't say how 'g'
1786 type descriptors represent that info. Someone with access
1787 to Sun's toolchain should try it out.
1789 - According to the comment in define_symbol (search for
1790 `process_prototype_types:'), Sun emits integer arguments as
1791 types which ref themselves --- like `void' types. Do we
1792 have to deal with that here, too? Again, someone with
1793 access to Sun's toolchain should try it out and let us
1796 const char *type_start = (*pp) - 1;
1797 struct type *return_type = read_type (pp, objfile);
1798 struct type *func_type
1799 = make_function_type (return_type,
1800 dbx_lookup_type (typenums, objfile));
1803 struct type_list *next;
1807 while (**pp && **pp != '#')
1809 struct type *arg_type = read_type (pp, objfile);
1810 struct type_list *new = alloca (sizeof (*new));
1811 new->type = arg_type;
1812 new->next = arg_types;
1820 complaint (&symfile_complaints,
1821 _("Prototyped function type didn't "
1822 "end arguments with `#':\n%s"),
1826 /* If there is just one argument whose type is `void', then
1827 that's just an empty argument list. */
1829 && ! arg_types->next
1830 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1833 TYPE_FIELDS (func_type)
1834 = (struct field *) TYPE_ALLOC (func_type,
1835 num_args * sizeof (struct field));
1836 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1839 struct type_list *t;
1841 /* We stuck each argument type onto the front of the list
1842 when we read it, so the list is reversed. Build the
1843 fields array right-to-left. */
1844 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1845 TYPE_FIELD_TYPE (func_type, i) = t->type;
1847 TYPE_NFIELDS (func_type) = num_args;
1848 TYPE_PROTOTYPED (func_type) = 1;
1854 case 'k': /* Const qualifier on some type (Sun) */
1855 type = read_type (pp, objfile);
1856 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1857 dbx_lookup_type (typenums, objfile));
1860 case 'B': /* Volatile qual on some type (Sun) */
1861 type = read_type (pp, objfile);
1862 type = make_cv_type (TYPE_CONST (type), 1, type,
1863 dbx_lookup_type (typenums, objfile));
1867 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1868 { /* Member (class & variable) type */
1869 /* FIXME -- we should be doing smash_to_XXX types here. */
1871 struct type *domain = read_type (pp, objfile);
1872 struct type *memtype;
1875 /* Invalid member type data format. */
1876 return error_type (pp, objfile);
1879 memtype = read_type (pp, objfile);
1880 type = dbx_alloc_type (typenums, objfile);
1881 smash_to_memberptr_type (type, domain, memtype);
1884 /* type attribute */
1888 /* Skip to the semicolon. */
1889 while (**pp != ';' && **pp != '\0')
1892 return error_type (pp, objfile);
1894 ++ * pp; /* Skip the semicolon. */
1898 case 's': /* Size attribute */
1899 type_size = atoi (attr + 1);
1904 case 'S': /* String attribute */
1905 /* FIXME: check to see if following type is array? */
1909 case 'V': /* Vector attribute */
1910 /* FIXME: check to see if following type is array? */
1915 /* Ignore unrecognized type attributes, so future compilers
1916 can invent new ones. */
1924 case '#': /* Method (class & fn) type */
1925 if ((*pp)[0] == '#')
1927 /* We'll get the parameter types from the name. */
1928 struct type *return_type;
1931 return_type = read_type (pp, objfile);
1932 if (*(*pp)++ != ';')
1933 complaint (&symfile_complaints,
1934 _("invalid (minimal) member type "
1935 "data format at symtab pos %d."),
1937 type = allocate_stub_method (return_type);
1938 if (typenums[0] != -1)
1939 *dbx_lookup_type (typenums, objfile) = type;
1943 struct type *domain = read_type (pp, objfile);
1944 struct type *return_type;
1949 /* Invalid member type data format. */
1950 return error_type (pp, objfile);
1954 return_type = read_type (pp, objfile);
1955 args = read_args (pp, ';', objfile, &nargs, &varargs);
1957 return error_type (pp, objfile);
1958 type = dbx_alloc_type (typenums, objfile);
1959 smash_to_method_type (type, domain, return_type, args,
1964 case 'r': /* Range type */
1965 type = read_range_type (pp, typenums, type_size, objfile);
1966 if (typenums[0] != -1)
1967 *dbx_lookup_type (typenums, objfile) = type;
1972 /* Sun ACC builtin int type */
1973 type = read_sun_builtin_type (pp, typenums, objfile);
1974 if (typenums[0] != -1)
1975 *dbx_lookup_type (typenums, objfile) = type;
1979 case 'R': /* Sun ACC builtin float type */
1980 type = read_sun_floating_type (pp, typenums, objfile);
1981 if (typenums[0] != -1)
1982 *dbx_lookup_type (typenums, objfile) = type;
1985 case 'e': /* Enumeration type */
1986 type = dbx_alloc_type (typenums, objfile);
1987 type = read_enum_type (pp, type, objfile);
1988 if (typenums[0] != -1)
1989 *dbx_lookup_type (typenums, objfile) = type;
1992 case 's': /* Struct type */
1993 case 'u': /* Union type */
1995 enum type_code type_code = TYPE_CODE_UNDEF;
1996 type = dbx_alloc_type (typenums, objfile);
1997 switch (type_descriptor)
2000 type_code = TYPE_CODE_STRUCT;
2003 type_code = TYPE_CODE_UNION;
2006 type = read_struct_type (pp, type, type_code, objfile);
2010 case 'a': /* Array type */
2012 return error_type (pp, objfile);
2015 type = dbx_alloc_type (typenums, objfile);
2016 type = read_array_type (pp, type, objfile);
2018 TYPE_CODE (type) = TYPE_CODE_STRING;
2020 make_vector_type (type);
2023 case 'S': /* Set type */
2024 type1 = read_type (pp, objfile);
2025 type = create_set_type ((struct type *) NULL, type1);
2026 if (typenums[0] != -1)
2027 *dbx_lookup_type (typenums, objfile) = type;
2031 --*pp; /* Go back to the symbol in error. */
2032 /* Particularly important if it was \0! */
2033 return error_type (pp, objfile);
2038 warning (_("GDB internal error, type is NULL in stabsread.c."));
2039 return error_type (pp, objfile);
2042 /* Size specified in a type attribute overrides any other size. */
2043 if (type_size != -1)
2044 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2049 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2050 Return the proper type node for a given builtin type number. */
2052 static const struct objfile_data *rs6000_builtin_type_data;
2054 static struct type *
2055 rs6000_builtin_type (int typenum, struct objfile *objfile)
2057 struct type **negative_types = objfile_data (objfile,
2058 rs6000_builtin_type_data);
2060 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2061 #define NUMBER_RECOGNIZED 34
2062 struct type *rettype = NULL;
2064 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2066 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
2067 return objfile_type (objfile)->builtin_error;
2070 if (!negative_types)
2072 /* This includes an empty slot for type number -0. */
2073 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2074 NUMBER_RECOGNIZED + 1, struct type *);
2075 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2078 if (negative_types[-typenum] != NULL)
2079 return negative_types[-typenum];
2081 #if TARGET_CHAR_BIT != 8
2082 #error This code wrong for TARGET_CHAR_BIT not 8
2083 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2084 that if that ever becomes not true, the correct fix will be to
2085 make the size in the struct type to be in bits, not in units of
2092 /* The size of this and all the other types are fixed, defined
2093 by the debugging format. If there is a type called "int" which
2094 is other than 32 bits, then it should use a new negative type
2095 number (or avoid negative type numbers for that case).
2096 See stabs.texinfo. */
2097 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", objfile);
2100 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", objfile);
2103 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", objfile);
2106 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", objfile);
2109 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
2110 "unsigned char", objfile);
2113 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", objfile);
2116 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
2117 "unsigned short", objfile);
2120 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2121 "unsigned int", objfile);
2124 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2125 "unsigned", objfile);
2128 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2129 "unsigned long", objfile);
2132 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", objfile);
2135 /* IEEE single precision (32 bit). */
2136 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", objfile);
2139 /* IEEE double precision (64 bit). */
2140 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", objfile);
2143 /* This is an IEEE double on the RS/6000, and different machines with
2144 different sizes for "long double" should use different negative
2145 type numbers. See stabs.texinfo. */
2146 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", objfile);
2149 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", objfile);
2152 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2153 "boolean", objfile);
2156 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", objfile);
2159 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", objfile);
2162 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", objfile);
2165 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2166 "character", objfile);
2169 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2170 "logical*1", objfile);
2173 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2174 "logical*2", objfile);
2177 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2178 "logical*4", objfile);
2181 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2182 "logical", objfile);
2185 /* Complex type consisting of two IEEE single precision values. */
2186 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", objfile);
2187 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2191 /* Complex type consisting of two IEEE double precision values. */
2192 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2193 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2197 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", objfile);
2200 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", objfile);
2203 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", objfile);
2206 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", objfile);
2209 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", objfile);
2212 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2213 "unsigned long long", objfile);
2216 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2217 "logical*8", objfile);
2220 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", objfile);
2223 negative_types[-typenum] = rettype;
2227 /* This page contains subroutines of read_type. */
2229 /* Wrapper around method_name_from_physname to flag a complaint
2230 if there is an error. */
2233 stabs_method_name_from_physname (const char *physname)
2237 method_name = method_name_from_physname (physname);
2239 if (method_name == NULL)
2241 complaint (&symfile_complaints,
2242 _("Method has bad physname %s\n"), physname);
2249 /* Read member function stabs info for C++ classes. The form of each member
2252 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2254 An example with two member functions is:
2256 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2258 For the case of overloaded operators, the format is op$::*.funcs, where
2259 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2260 name (such as `+=') and `.' marks the end of the operator name.
2262 Returns 1 for success, 0 for failure. */
2265 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2266 struct objfile *objfile)
2273 struct next_fnfield *next;
2274 struct fn_field fn_field;
2277 struct type *look_ahead_type;
2278 struct next_fnfieldlist *new_fnlist;
2279 struct next_fnfield *new_sublist;
2283 /* Process each list until we find something that is not a member function
2284 or find the end of the functions. */
2288 /* We should be positioned at the start of the function name.
2289 Scan forward to find the first ':' and if it is not the
2290 first of a "::" delimiter, then this is not a member function. */
2302 look_ahead_type = NULL;
2305 new_fnlist = (struct next_fnfieldlist *)
2306 xmalloc (sizeof (struct next_fnfieldlist));
2307 make_cleanup (xfree, new_fnlist);
2308 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
2310 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2312 /* This is a completely wierd case. In order to stuff in the
2313 names that might contain colons (the usual name delimiter),
2314 Mike Tiemann defined a different name format which is
2315 signalled if the identifier is "op$". In that case, the
2316 format is "op$::XXXX." where XXXX is the name. This is
2317 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2318 /* This lets the user type "break operator+".
2319 We could just put in "+" as the name, but that wouldn't
2321 static char opname[32] = "op$";
2322 char *o = opname + 3;
2324 /* Skip past '::'. */
2327 STABS_CONTINUE (pp, objfile);
2333 main_fn_name = savestring (opname, o - opname);
2339 main_fn_name = savestring (*pp, p - *pp);
2340 /* Skip past '::'. */
2343 new_fnlist->fn_fieldlist.name = main_fn_name;
2348 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
2349 make_cleanup (xfree, new_sublist);
2350 memset (new_sublist, 0, sizeof (struct next_fnfield));
2352 /* Check for and handle cretinous dbx symbol name continuation! */
2353 if (look_ahead_type == NULL)
2356 STABS_CONTINUE (pp, objfile);
2358 new_sublist->fn_field.type = read_type (pp, objfile);
2361 /* Invalid symtab info for member function. */
2367 /* g++ version 1 kludge */
2368 new_sublist->fn_field.type = look_ahead_type;
2369 look_ahead_type = NULL;
2379 /* If this is just a stub, then we don't have the real name here. */
2381 if (TYPE_STUB (new_sublist->fn_field.type))
2383 if (!TYPE_SELF_TYPE (new_sublist->fn_field.type))
2384 TYPE_SELF_TYPE (new_sublist->fn_field.type) = type;
2385 new_sublist->fn_field.is_stub = 1;
2387 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2390 /* Set this member function's visibility fields. */
2393 case VISIBILITY_PRIVATE:
2394 new_sublist->fn_field.is_private = 1;
2396 case VISIBILITY_PROTECTED:
2397 new_sublist->fn_field.is_protected = 1;
2401 STABS_CONTINUE (pp, objfile);
2404 case 'A': /* Normal functions. */
2405 new_sublist->fn_field.is_const = 0;
2406 new_sublist->fn_field.is_volatile = 0;
2409 case 'B': /* `const' member functions. */
2410 new_sublist->fn_field.is_const = 1;
2411 new_sublist->fn_field.is_volatile = 0;
2414 case 'C': /* `volatile' member function. */
2415 new_sublist->fn_field.is_const = 0;
2416 new_sublist->fn_field.is_volatile = 1;
2419 case 'D': /* `const volatile' member function. */
2420 new_sublist->fn_field.is_const = 1;
2421 new_sublist->fn_field.is_volatile = 1;
2424 case '*': /* File compiled with g++ version 1 --
2430 complaint (&symfile_complaints,
2431 _("const/volatile indicator missing, got '%c'"),
2441 /* virtual member function, followed by index.
2442 The sign bit is set to distinguish pointers-to-methods
2443 from virtual function indicies. Since the array is
2444 in words, the quantity must be shifted left by 1
2445 on 16 bit machine, and by 2 on 32 bit machine, forcing
2446 the sign bit out, and usable as a valid index into
2447 the array. Remove the sign bit here. */
2448 new_sublist->fn_field.voffset =
2449 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2453 STABS_CONTINUE (pp, objfile);
2454 if (**pp == ';' || **pp == '\0')
2456 /* Must be g++ version 1. */
2457 new_sublist->fn_field.fcontext = 0;
2461 /* Figure out from whence this virtual function came.
2462 It may belong to virtual function table of
2463 one of its baseclasses. */
2464 look_ahead_type = read_type (pp, objfile);
2467 /* g++ version 1 overloaded methods. */
2471 new_sublist->fn_field.fcontext = look_ahead_type;
2480 look_ahead_type = NULL;
2486 /* static member function. */
2488 int slen = strlen (main_fn_name);
2490 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2492 /* For static member functions, we can't tell if they
2493 are stubbed, as they are put out as functions, and not as
2495 GCC v2 emits the fully mangled name if
2496 dbxout.c:flag_minimal_debug is not set, so we have to
2497 detect a fully mangled physname here and set is_stub
2498 accordingly. Fully mangled physnames in v2 start with
2499 the member function name, followed by two underscores.
2500 GCC v3 currently always emits stubbed member functions,
2501 but with fully mangled physnames, which start with _Z. */
2502 if (!(strncmp (new_sublist->fn_field.physname,
2503 main_fn_name, slen) == 0
2504 && new_sublist->fn_field.physname[slen] == '_'
2505 && new_sublist->fn_field.physname[slen + 1] == '_'))
2507 new_sublist->fn_field.is_stub = 1;
2514 complaint (&symfile_complaints,
2515 _("member function type missing, got '%c'"),
2517 /* Fall through into normal member function. */
2520 /* normal member function. */
2521 new_sublist->fn_field.voffset = 0;
2522 new_sublist->fn_field.fcontext = 0;
2526 new_sublist->next = sublist;
2527 sublist = new_sublist;
2529 STABS_CONTINUE (pp, objfile);
2531 while (**pp != ';' && **pp != '\0');
2534 STABS_CONTINUE (pp, objfile);
2536 /* Skip GCC 3.X member functions which are duplicates of the callable
2537 constructor/destructor. */
2538 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2539 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2540 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2542 xfree (main_fn_name);
2547 int has_destructor = 0, has_other = 0;
2549 struct next_fnfield *tmp_sublist;
2551 /* Various versions of GCC emit various mostly-useless
2552 strings in the name field for special member functions.
2554 For stub methods, we need to defer correcting the name
2555 until we are ready to unstub the method, because the current
2556 name string is used by gdb_mangle_name. The only stub methods
2557 of concern here are GNU v2 operators; other methods have their
2558 names correct (see caveat below).
2560 For non-stub methods, in GNU v3, we have a complete physname.
2561 Therefore we can safely correct the name now. This primarily
2562 affects constructors and destructors, whose name will be
2563 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2564 operators will also have incorrect names; for instance,
2565 "operator int" will be named "operator i" (i.e. the type is
2568 For non-stub methods in GNU v2, we have no easy way to
2569 know if we have a complete physname or not. For most
2570 methods the result depends on the platform (if CPLUS_MARKER
2571 can be `$' or `.', it will use minimal debug information, or
2572 otherwise the full physname will be included).
2574 Rather than dealing with this, we take a different approach.
2575 For v3 mangled names, we can use the full physname; for v2,
2576 we use cplus_demangle_opname (which is actually v2 specific),
2577 because the only interesting names are all operators - once again
2578 barring the caveat below. Skip this process if any method in the
2579 group is a stub, to prevent our fouling up the workings of
2582 The caveat: GCC 2.95.x (and earlier?) put constructors and
2583 destructors in the same method group. We need to split this
2584 into two groups, because they should have different names.
2585 So for each method group we check whether it contains both
2586 routines whose physname appears to be a destructor (the physnames
2587 for and destructors are always provided, due to quirks in v2
2588 mangling) and routines whose physname does not appear to be a
2589 destructor. If so then we break up the list into two halves.
2590 Even if the constructors and destructors aren't in the same group
2591 the destructor will still lack the leading tilde, so that also
2594 So, to summarize what we expect and handle here:
2596 Given Given Real Real Action
2597 method name physname physname method name
2599 __opi [none] __opi__3Foo operator int opname
2601 Foo _._3Foo _._3Foo ~Foo separate and
2603 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2604 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2607 tmp_sublist = sublist;
2608 while (tmp_sublist != NULL)
2610 if (tmp_sublist->fn_field.is_stub)
2612 if (tmp_sublist->fn_field.physname[0] == '_'
2613 && tmp_sublist->fn_field.physname[1] == 'Z')
2616 if (is_destructor_name (tmp_sublist->fn_field.physname))
2621 tmp_sublist = tmp_sublist->next;
2624 if (has_destructor && has_other)
2626 struct next_fnfieldlist *destr_fnlist;
2627 struct next_fnfield *last_sublist;
2629 /* Create a new fn_fieldlist for the destructors. */
2631 destr_fnlist = (struct next_fnfieldlist *)
2632 xmalloc (sizeof (struct next_fnfieldlist));
2633 make_cleanup (xfree, destr_fnlist);
2634 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
2635 destr_fnlist->fn_fieldlist.name
2636 = obconcat (&objfile->objfile_obstack, "~",
2637 new_fnlist->fn_fieldlist.name, (char *) NULL);
2639 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2640 obstack_alloc (&objfile->objfile_obstack,
2641 sizeof (struct fn_field) * has_destructor);
2642 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2643 sizeof (struct fn_field) * has_destructor);
2644 tmp_sublist = sublist;
2645 last_sublist = NULL;
2647 while (tmp_sublist != NULL)
2649 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2651 tmp_sublist = tmp_sublist->next;
2655 destr_fnlist->fn_fieldlist.fn_fields[i++]
2656 = tmp_sublist->fn_field;
2658 last_sublist->next = tmp_sublist->next;
2660 sublist = tmp_sublist->next;
2661 last_sublist = tmp_sublist;
2662 tmp_sublist = tmp_sublist->next;
2665 destr_fnlist->fn_fieldlist.length = has_destructor;
2666 destr_fnlist->next = fip->fnlist;
2667 fip->fnlist = destr_fnlist;
2669 length -= has_destructor;
2673 /* v3 mangling prevents the use of abbreviated physnames,
2674 so we can do this here. There are stubbed methods in v3
2676 - in -gstabs instead of -gstabs+
2677 - or for static methods, which are output as a function type
2678 instead of a method type. */
2679 char *new_method_name =
2680 stabs_method_name_from_physname (sublist->fn_field.physname);
2682 if (new_method_name != NULL
2683 && strcmp (new_method_name,
2684 new_fnlist->fn_fieldlist.name) != 0)
2686 new_fnlist->fn_fieldlist.name = new_method_name;
2687 xfree (main_fn_name);
2690 xfree (new_method_name);
2692 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2694 new_fnlist->fn_fieldlist.name =
2695 obconcat (&objfile->objfile_obstack,
2696 "~", main_fn_name, (char *)NULL);
2697 xfree (main_fn_name);
2701 char dem_opname[256];
2704 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2705 dem_opname, DMGL_ANSI);
2707 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2710 new_fnlist->fn_fieldlist.name
2711 = obstack_copy0 (&objfile->objfile_obstack,
2712 dem_opname, strlen (dem_opname));
2713 xfree (main_fn_name);
2716 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2717 obstack_alloc (&objfile->objfile_obstack,
2718 sizeof (struct fn_field) * length);
2719 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2720 sizeof (struct fn_field) * length);
2721 for (i = length; (i--, sublist); sublist = sublist->next)
2723 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2726 new_fnlist->fn_fieldlist.length = length;
2727 new_fnlist->next = fip->fnlist;
2728 fip->fnlist = new_fnlist;
2735 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2736 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2737 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2738 memset (TYPE_FN_FIELDLISTS (type), 0,
2739 sizeof (struct fn_fieldlist) * nfn_fields);
2740 TYPE_NFN_FIELDS (type) = nfn_fields;
2746 /* Special GNU C++ name.
2748 Returns 1 for success, 0 for failure. "failure" means that we can't
2749 keep parsing and it's time for error_type(). */
2752 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2753 struct objfile *objfile)
2758 struct type *context;
2768 /* At this point, *pp points to something like "22:23=*22...",
2769 where the type number before the ':' is the "context" and
2770 everything after is a regular type definition. Lookup the
2771 type, find it's name, and construct the field name. */
2773 context = read_type (pp, objfile);
2777 case 'f': /* $vf -- a virtual function table pointer */
2778 name = type_name_no_tag (context);
2783 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2784 vptr_name, name, (char *) NULL);
2787 case 'b': /* $vb -- a virtual bsomethingorother */
2788 name = type_name_no_tag (context);
2791 complaint (&symfile_complaints,
2792 _("C++ abbreviated type name "
2793 "unknown at symtab pos %d"),
2797 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2798 name, (char *) NULL);
2802 invalid_cpp_abbrev_complaint (*pp);
2803 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2804 "INVALID_CPLUSPLUS_ABBREV",
2809 /* At this point, *pp points to the ':'. Skip it and read the
2815 invalid_cpp_abbrev_complaint (*pp);
2818 fip->list->field.type = read_type (pp, objfile);
2820 (*pp)++; /* Skip the comma. */
2827 SET_FIELD_BITPOS (fip->list->field,
2828 read_huge_number (pp, ';', &nbits, 0));
2832 /* This field is unpacked. */
2833 FIELD_BITSIZE (fip->list->field) = 0;
2834 fip->list->visibility = VISIBILITY_PRIVATE;
2838 invalid_cpp_abbrev_complaint (*pp);
2839 /* We have no idea what syntax an unrecognized abbrev would have, so
2840 better return 0. If we returned 1, we would need to at least advance
2841 *pp to avoid an infinite loop. */
2848 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2849 struct type *type, struct objfile *objfile)
2851 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2853 fip->list->field.name =
2854 obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
2857 /* This means we have a visibility for a field coming. */
2861 fip->list->visibility = *(*pp)++;
2865 /* normal dbx-style format, no explicit visibility */
2866 fip->list->visibility = VISIBILITY_PUBLIC;
2869 fip->list->field.type = read_type (pp, objfile);
2874 /* Possible future hook for nested types. */
2877 fip->list->field.bitpos = (long) -2; /* nested type */
2887 /* Static class member. */
2888 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2892 else if (**pp != ',')
2894 /* Bad structure-type format. */
2895 stabs_general_complaint ("bad structure-type format");
2899 (*pp)++; /* Skip the comma. */
2904 SET_FIELD_BITPOS (fip->list->field,
2905 read_huge_number (pp, ',', &nbits, 0));
2908 stabs_general_complaint ("bad structure-type format");
2911 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2914 stabs_general_complaint ("bad structure-type format");
2919 if (FIELD_BITPOS (fip->list->field) == 0
2920 && FIELD_BITSIZE (fip->list->field) == 0)
2922 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2923 it is a field which has been optimized out. The correct stab for
2924 this case is to use VISIBILITY_IGNORE, but that is a recent
2925 invention. (2) It is a 0-size array. For example
2926 union { int num; char str[0]; } foo. Printing _("<no value>" for
2927 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2928 will continue to work, and a 0-size array as a whole doesn't
2929 have any contents to print.
2931 I suspect this probably could also happen with gcc -gstabs (not
2932 -gstabs+) for static fields, and perhaps other C++ extensions.
2933 Hopefully few people use -gstabs with gdb, since it is intended
2934 for dbx compatibility. */
2936 /* Ignore this field. */
2937 fip->list->visibility = VISIBILITY_IGNORE;
2941 /* Detect an unpacked field and mark it as such.
2942 dbx gives a bit size for all fields.
2943 Note that forward refs cannot be packed,
2944 and treat enums as if they had the width of ints. */
2946 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2948 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2949 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2950 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2951 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2953 FIELD_BITSIZE (fip->list->field) = 0;
2955 if ((FIELD_BITSIZE (fip->list->field)
2956 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2957 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2958 && FIELD_BITSIZE (fip->list->field)
2959 == gdbarch_int_bit (gdbarch))
2962 FIELD_BITPOS (fip->list->field) % 8 == 0)
2964 FIELD_BITSIZE (fip->list->field) = 0;
2970 /* Read struct or class data fields. They have the form:
2972 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2974 At the end, we see a semicolon instead of a field.
2976 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2979 The optional VISIBILITY is one of:
2981 '/0' (VISIBILITY_PRIVATE)
2982 '/1' (VISIBILITY_PROTECTED)
2983 '/2' (VISIBILITY_PUBLIC)
2984 '/9' (VISIBILITY_IGNORE)
2986 or nothing, for C style fields with public visibility.
2988 Returns 1 for success, 0 for failure. */
2991 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
2992 struct objfile *objfile)
2995 struct nextfield *new;
2997 /* We better set p right now, in case there are no fields at all... */
3001 /* Read each data member type until we find the terminating ';' at the end of
3002 the data member list, or break for some other reason such as finding the
3003 start of the member function list. */
3004 /* Stab string for structure/union does not end with two ';' in
3005 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3007 while (**pp != ';' && **pp != '\0')
3009 STABS_CONTINUE (pp, objfile);
3010 /* Get space to record the next field's data. */
3011 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3012 make_cleanup (xfree, new);
3013 memset (new, 0, sizeof (struct nextfield));
3014 new->next = fip->list;
3017 /* Get the field name. */
3020 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3021 unless the CPLUS_MARKER is followed by an underscore, in
3022 which case it is just the name of an anonymous type, which we
3023 should handle like any other type name. */
3025 if (is_cplus_marker (p[0]) && p[1] != '_')
3027 if (!read_cpp_abbrev (fip, pp, type, objfile))
3032 /* Look for the ':' that separates the field name from the field
3033 values. Data members are delimited by a single ':', while member
3034 functions are delimited by a pair of ':'s. When we hit the member
3035 functions (if any), terminate scan loop and return. */
3037 while (*p != ':' && *p != '\0')
3044 /* Check to see if we have hit the member functions yet. */
3049 read_one_struct_field (fip, pp, p, type, objfile);
3051 if (p[0] == ':' && p[1] == ':')
3053 /* (the deleted) chill the list of fields: the last entry (at
3054 the head) is a partially constructed entry which we now
3056 fip->list = fip->list->next;
3061 /* The stabs for C++ derived classes contain baseclass information which
3062 is marked by a '!' character after the total size. This function is
3063 called when we encounter the baseclass marker, and slurps up all the
3064 baseclass information.
3066 Immediately following the '!' marker is the number of base classes that
3067 the class is derived from, followed by information for each base class.
3068 For each base class, there are two visibility specifiers, a bit offset
3069 to the base class information within the derived class, a reference to
3070 the type for the base class, and a terminating semicolon.
3072 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3074 Baseclass information marker __________________|| | | | | | |
3075 Number of baseclasses __________________________| | | | | | |
3076 Visibility specifiers (2) ________________________| | | | | |
3077 Offset in bits from start of class _________________| | | | |
3078 Type number for base class ___________________________| | | |
3079 Visibility specifiers (2) _______________________________| | |
3080 Offset in bits from start of class ________________________| |
3081 Type number of base class ____________________________________|
3083 Return 1 for success, 0 for (error-type-inducing) failure. */
3089 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3090 struct objfile *objfile)
3093 struct nextfield *new;
3101 /* Skip the '!' baseclass information marker. */
3105 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3109 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3115 /* Some stupid compilers have trouble with the following, so break
3116 it up into simpler expressions. */
3117 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3118 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3121 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3124 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3125 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3129 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3131 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3133 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3134 make_cleanup (xfree, new);
3135 memset (new, 0, sizeof (struct nextfield));
3136 new->next = fip->list;
3138 FIELD_BITSIZE (new->field) = 0; /* This should be an unpacked
3141 STABS_CONTINUE (pp, objfile);
3145 /* Nothing to do. */
3148 SET_TYPE_FIELD_VIRTUAL (type, i);
3151 /* Unknown character. Complain and treat it as non-virtual. */
3153 complaint (&symfile_complaints,
3154 _("Unknown virtual character `%c' for baseclass"),
3160 new->visibility = *(*pp)++;
3161 switch (new->visibility)
3163 case VISIBILITY_PRIVATE:
3164 case VISIBILITY_PROTECTED:
3165 case VISIBILITY_PUBLIC:
3168 /* Bad visibility format. Complain and treat it as
3171 complaint (&symfile_complaints,
3172 _("Unknown visibility `%c' for baseclass"),
3174 new->visibility = VISIBILITY_PUBLIC;
3181 /* The remaining value is the bit offset of the portion of the object
3182 corresponding to this baseclass. Always zero in the absence of
3183 multiple inheritance. */
3185 SET_FIELD_BITPOS (new->field, read_huge_number (pp, ',', &nbits, 0));
3190 /* The last piece of baseclass information is the type of the
3191 base class. Read it, and remember it's type name as this
3194 new->field.type = read_type (pp, objfile);
3195 new->field.name = type_name_no_tag (new->field.type);
3197 /* Skip trailing ';' and bump count of number of fields seen. */
3206 /* The tail end of stabs for C++ classes that contain a virtual function
3207 pointer contains a tilde, a %, and a type number.
3208 The type number refers to the base class (possibly this class itself) which
3209 contains the vtable pointer for the current class.
3211 This function is called when we have parsed all the method declarations,
3212 so we can look for the vptr base class info. */
3215 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3216 struct objfile *objfile)
3220 STABS_CONTINUE (pp, objfile);
3222 /* If we are positioned at a ';', then skip it. */
3232 if (**pp == '=' || **pp == '+' || **pp == '-')
3234 /* Obsolete flags that used to indicate the presence
3235 of constructors and/or destructors. */
3239 /* Read either a '%' or the final ';'. */
3240 if (*(*pp)++ == '%')
3242 /* The next number is the type number of the base class
3243 (possibly our own class) which supplies the vtable for
3244 this class. Parse it out, and search that class to find
3245 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3246 and TYPE_VPTR_FIELDNO. */
3251 t = read_type (pp, objfile);
3253 while (*p != '\0' && *p != ';')
3259 /* Premature end of symbol. */
3263 TYPE_VPTR_BASETYPE (type) = t;
3264 if (type == t) /* Our own class provides vtbl ptr. */
3266 for (i = TYPE_NFIELDS (t) - 1;
3267 i >= TYPE_N_BASECLASSES (t);
3270 const char *name = TYPE_FIELD_NAME (t, i);
3272 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3273 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3275 TYPE_VPTR_FIELDNO (type) = i;
3279 /* Virtual function table field not found. */
3280 complaint (&symfile_complaints,
3281 _("virtual function table pointer "
3282 "not found when defining class `%s'"),
3288 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
3299 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3303 for (n = TYPE_NFN_FIELDS (type);
3304 fip->fnlist != NULL;
3305 fip->fnlist = fip->fnlist->next)
3307 --n; /* Circumvent Sun3 compiler bug. */
3308 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3313 /* Create the vector of fields, and record how big it is.
3314 We need this info to record proper virtual function table information
3315 for this class's virtual functions. */
3318 attach_fields_to_type (struct field_info *fip, struct type *type,
3319 struct objfile *objfile)
3322 int non_public_fields = 0;
3323 struct nextfield *scan;
3325 /* Count up the number of fields that we have, as well as taking note of
3326 whether or not there are any non-public fields, which requires us to
3327 allocate and build the private_field_bits and protected_field_bits
3330 for (scan = fip->list; scan != NULL; scan = scan->next)
3333 if (scan->visibility != VISIBILITY_PUBLIC)
3335 non_public_fields++;
3339 /* Now we know how many fields there are, and whether or not there are any
3340 non-public fields. Record the field count, allocate space for the
3341 array of fields, and create blank visibility bitfields if necessary. */
3343 TYPE_NFIELDS (type) = nfields;
3344 TYPE_FIELDS (type) = (struct field *)
3345 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3346 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3348 if (non_public_fields)
3350 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3352 TYPE_FIELD_PRIVATE_BITS (type) =
3353 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3354 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3356 TYPE_FIELD_PROTECTED_BITS (type) =
3357 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3358 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3360 TYPE_FIELD_IGNORE_BITS (type) =
3361 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3362 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3365 /* Copy the saved-up fields into the field vector. Start from the
3366 head of the list, adding to the tail of the field array, so that
3367 they end up in the same order in the array in which they were
3368 added to the list. */
3370 while (nfields-- > 0)
3372 TYPE_FIELD (type, nfields) = fip->list->field;
3373 switch (fip->list->visibility)
3375 case VISIBILITY_PRIVATE:
3376 SET_TYPE_FIELD_PRIVATE (type, nfields);
3379 case VISIBILITY_PROTECTED:
3380 SET_TYPE_FIELD_PROTECTED (type, nfields);
3383 case VISIBILITY_IGNORE:
3384 SET_TYPE_FIELD_IGNORE (type, nfields);
3387 case VISIBILITY_PUBLIC:
3391 /* Unknown visibility. Complain and treat it as public. */
3393 complaint (&symfile_complaints,
3394 _("Unknown visibility `%c' for field"),
3395 fip->list->visibility);
3399 fip->list = fip->list->next;
3405 /* Complain that the compiler has emitted more than one definition for the
3406 structure type TYPE. */
3408 complain_about_struct_wipeout (struct type *type)
3410 const char *name = "";
3411 const char *kind = "";
3413 if (TYPE_TAG_NAME (type))
3415 name = TYPE_TAG_NAME (type);
3416 switch (TYPE_CODE (type))
3418 case TYPE_CODE_STRUCT: kind = "struct "; break;
3419 case TYPE_CODE_UNION: kind = "union "; break;
3420 case TYPE_CODE_ENUM: kind = "enum "; break;
3424 else if (TYPE_NAME (type))
3426 name = TYPE_NAME (type);
3435 complaint (&symfile_complaints,
3436 _("struct/union type gets multiply defined: %s%s"), kind, name);
3439 /* Set the length for all variants of a same main_type, which are
3440 connected in the closed chain.
3442 This is something that needs to be done when a type is defined *after*
3443 some cross references to this type have already been read. Consider
3444 for instance the following scenario where we have the following two
3447 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3448 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3450 A stubbed version of type dummy is created while processing the first
3451 stabs entry. The length of that type is initially set to zero, since
3452 it is unknown at this point. Also, a "constant" variation of type
3453 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3456 The second stabs entry allows us to replace the stubbed definition
3457 with the real definition. However, we still need to adjust the length
3458 of the "constant" variation of that type, as its length was left
3459 untouched during the main type replacement... */
3462 set_length_in_type_chain (struct type *type)
3464 struct type *ntype = TYPE_CHAIN (type);
3466 while (ntype != type)
3468 if (TYPE_LENGTH(ntype) == 0)
3469 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3471 complain_about_struct_wipeout (ntype);
3472 ntype = TYPE_CHAIN (ntype);
3476 /* Read the description of a structure (or union type) and return an object
3477 describing the type.
3479 PP points to a character pointer that points to the next unconsumed token
3480 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3481 *PP will point to "4a:1,0,32;;".
3483 TYPE points to an incomplete type that needs to be filled in.
3485 OBJFILE points to the current objfile from which the stabs information is
3486 being read. (Note that it is redundant in that TYPE also contains a pointer
3487 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3490 static struct type *
3491 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3492 struct objfile *objfile)
3494 struct cleanup *back_to;
3495 struct field_info fi;
3500 /* When describing struct/union/class types in stabs, G++ always drops
3501 all qualifications from the name. So if you've got:
3502 struct A { ... struct B { ... }; ... };
3503 then G++ will emit stabs for `struct A::B' that call it simply
3504 `struct B'. Obviously, if you've got a real top-level definition for
3505 `struct B', or other nested definitions, this is going to cause
3508 Obviously, GDB can't fix this by itself, but it can at least avoid
3509 scribbling on existing structure type objects when new definitions
3511 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3512 || TYPE_STUB (type)))
3514 complain_about_struct_wipeout (type);
3516 /* It's probably best to return the type unchanged. */
3520 back_to = make_cleanup (null_cleanup, 0);
3522 INIT_CPLUS_SPECIFIC (type);
3523 TYPE_CODE (type) = type_code;
3524 TYPE_STUB (type) = 0;
3526 /* First comes the total size in bytes. */
3531 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3534 do_cleanups (back_to);
3535 return error_type (pp, objfile);
3537 set_length_in_type_chain (type);
3540 /* Now read the baseclasses, if any, read the regular C struct or C++
3541 class member fields, attach the fields to the type, read the C++
3542 member functions, attach them to the type, and then read any tilde
3543 field (baseclass specifier for the class holding the main vtable). */
3545 if (!read_baseclasses (&fi, pp, type, objfile)
3546 || !read_struct_fields (&fi, pp, type, objfile)
3547 || !attach_fields_to_type (&fi, type, objfile)
3548 || !read_member_functions (&fi, pp, type, objfile)
3549 || !attach_fn_fields_to_type (&fi, type)
3550 || !read_tilde_fields (&fi, pp, type, objfile))
3552 type = error_type (pp, objfile);
3555 do_cleanups (back_to);
3559 /* Read a definition of an array type,
3560 and create and return a suitable type object.
3561 Also creates a range type which represents the bounds of that
3564 static struct type *
3565 read_array_type (char **pp, struct type *type,
3566 struct objfile *objfile)
3568 struct type *index_type, *element_type, *range_type;
3573 /* Format of an array type:
3574 "ar<index type>;lower;upper;<array_contents_type>".
3575 OS9000: "arlower,upper;<array_contents_type>".
3577 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3578 for these, produce a type like float[][]. */
3581 index_type = read_type (pp, objfile);
3583 /* Improper format of array type decl. */
3584 return error_type (pp, objfile);
3588 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3593 lower = read_huge_number (pp, ';', &nbits, 0);
3596 return error_type (pp, objfile);
3598 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3603 upper = read_huge_number (pp, ';', &nbits, 0);
3605 return error_type (pp, objfile);
3607 element_type = read_type (pp, objfile);
3616 create_static_range_type ((struct type *) NULL, index_type, lower, upper);
3617 type = create_array_type (type, element_type, range_type);
3623 /* Read a definition of an enumeration type,
3624 and create and return a suitable type object.
3625 Also defines the symbols that represent the values of the type. */
3627 static struct type *
3628 read_enum_type (char **pp, struct type *type,
3629 struct objfile *objfile)
3631 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3637 struct pending **symlist;
3638 struct pending *osyms, *syms;
3641 int unsigned_enum = 1;
3644 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3645 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3646 to do? For now, force all enum values to file scope. */
3647 if (within_function)
3648 symlist = &local_symbols;
3651 symlist = &file_symbols;
3653 o_nsyms = osyms ? osyms->nsyms : 0;
3655 /* The aix4 compiler emits an extra field before the enum members;
3656 my guess is it's a type of some sort. Just ignore it. */
3659 /* Skip over the type. */
3663 /* Skip over the colon. */
3667 /* Read the value-names and their values.
3668 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3669 A semicolon or comma instead of a NAME means the end. */
3670 while (**pp && **pp != ';' && **pp != ',')
3672 STABS_CONTINUE (pp, objfile);
3676 name = obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
3678 n = read_huge_number (pp, ',', &nbits, 0);
3680 return error_type (pp, objfile);
3682 sym = allocate_symbol (objfile);
3683 SYMBOL_SET_LINKAGE_NAME (sym, name);
3684 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
3685 &objfile->objfile_obstack);
3686 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
3687 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3688 SYMBOL_VALUE (sym) = n;
3691 add_symbol_to_list (sym, symlist);
3696 (*pp)++; /* Skip the semicolon. */
3698 /* Now fill in the fields of the type-structure. */
3700 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3701 set_length_in_type_chain (type);
3702 TYPE_CODE (type) = TYPE_CODE_ENUM;
3703 TYPE_STUB (type) = 0;
3705 TYPE_UNSIGNED (type) = 1;
3706 TYPE_NFIELDS (type) = nsyms;
3707 TYPE_FIELDS (type) = (struct field *)
3708 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3709 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3711 /* Find the symbols for the values and put them into the type.
3712 The symbols can be found in the symlist that we put them on
3713 to cause them to be defined. osyms contains the old value
3714 of that symlist; everything up to there was defined by us. */
3715 /* Note that we preserve the order of the enum constants, so
3716 that in something like "enum {FOO, LAST_THING=FOO}" we print
3717 FOO, not LAST_THING. */
3719 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3721 int last = syms == osyms ? o_nsyms : 0;
3722 int j = syms->nsyms;
3724 for (; --j >= last; --n)
3726 struct symbol *xsym = syms->symbol[j];
3728 SYMBOL_TYPE (xsym) = type;
3729 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3730 SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
3731 TYPE_FIELD_BITSIZE (type, n) = 0;
3740 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3741 typedefs in every file (for int, long, etc):
3743 type = b <signed> <width> <format type>; <offset>; <nbits>
3745 optional format type = c or b for char or boolean.
3746 offset = offset from high order bit to start bit of type.
3747 width is # bytes in object of this type, nbits is # bits in type.
3749 The width/offset stuff appears to be for small objects stored in
3750 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3753 static struct type *
3754 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3759 enum type_code code = TYPE_CODE_INT;
3770 return error_type (pp, objfile);
3774 /* For some odd reason, all forms of char put a c here. This is strange
3775 because no other type has this honor. We can safely ignore this because
3776 we actually determine 'char'acterness by the number of bits specified in
3778 Boolean forms, e.g Fortran logical*X, put a b here. */
3782 else if (**pp == 'b')
3784 code = TYPE_CODE_BOOL;
3788 /* The first number appears to be the number of bytes occupied
3789 by this type, except that unsigned short is 4 instead of 2.
3790 Since this information is redundant with the third number,
3791 we will ignore it. */
3792 read_huge_number (pp, ';', &nbits, 0);
3794 return error_type (pp, objfile);
3796 /* The second number is always 0, so ignore it too. */
3797 read_huge_number (pp, ';', &nbits, 0);
3799 return error_type (pp, objfile);
3801 /* The third number is the number of bits for this type. */
3802 type_bits = read_huge_number (pp, 0, &nbits, 0);
3804 return error_type (pp, objfile);
3805 /* The type *should* end with a semicolon. If it are embedded
3806 in a larger type the semicolon may be the only way to know where
3807 the type ends. If this type is at the end of the stabstring we
3808 can deal with the omitted semicolon (but we don't have to like
3809 it). Don't bother to complain(), Sun's compiler omits the semicolon
3815 return init_type (TYPE_CODE_VOID, 1,
3816 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3819 return init_type (code,
3820 type_bits / TARGET_CHAR_BIT,
3821 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3825 static struct type *
3826 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3831 struct type *rettype;
3833 /* The first number has more details about the type, for example
3835 details = read_huge_number (pp, ';', &nbits, 0);
3837 return error_type (pp, objfile);
3839 /* The second number is the number of bytes occupied by this type. */
3840 nbytes = read_huge_number (pp, ';', &nbits, 0);
3842 return error_type (pp, objfile);
3844 if (details == NF_COMPLEX || details == NF_COMPLEX16
3845 || details == NF_COMPLEX32)
3847 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
3848 TYPE_TARGET_TYPE (rettype)
3849 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
3853 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
3856 /* Read a number from the string pointed to by *PP.
3857 The value of *PP is advanced over the number.
3858 If END is nonzero, the character that ends the
3859 number must match END, or an error happens;
3860 and that character is skipped if it does match.
3861 If END is zero, *PP is left pointing to that character.
3863 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3864 the number is represented in an octal representation, assume that
3865 it is represented in a 2's complement representation with a size of
3866 TWOS_COMPLEMENT_BITS.
3868 If the number fits in a long, set *BITS to 0 and return the value.
3869 If not, set *BITS to be the number of bits in the number and return 0.
3871 If encounter garbage, set *BITS to -1 and return 0. */
3874 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3885 int twos_complement_representation = 0;
3893 /* Leading zero means octal. GCC uses this to output values larger
3894 than an int (because that would be hard in decimal). */
3901 /* Skip extra zeros. */
3905 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3907 /* Octal, possibly signed. Check if we have enough chars for a
3913 while ((c = *p1) >= '0' && c < '8')
3917 if (len > twos_complement_bits / 3
3918 || (twos_complement_bits % 3 == 0
3919 && len == twos_complement_bits / 3))
3921 /* Ok, we have enough characters for a signed value, check
3922 for signness by testing if the sign bit is set. */
3923 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3925 if (c & (1 << sign_bit))
3927 /* Definitely signed. */
3928 twos_complement_representation = 1;
3934 upper_limit = LONG_MAX / radix;
3936 while ((c = *p++) >= '0' && c < ('0' + radix))
3938 if (n <= upper_limit)
3940 if (twos_complement_representation)
3942 /* Octal, signed, twos complement representation. In
3943 this case, n is the corresponding absolute value. */
3946 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3958 /* unsigned representation */
3960 n += c - '0'; /* FIXME this overflows anyway. */
3966 /* This depends on large values being output in octal, which is
3973 /* Ignore leading zeroes. */
3977 else if (c == '2' || c == '3')
3998 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
4000 /* We were supposed to parse a number with maximum
4001 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4012 /* Large decimal constants are an error (because it is hard to
4013 count how many bits are in them). */
4019 /* -0x7f is the same as 0x80. So deal with it by adding one to
4020 the number of bits. Two's complement represention octals
4021 can't have a '-' in front. */
4022 if (sign == -1 && !twos_complement_representation)
4033 /* It's *BITS which has the interesting information. */
4037 static struct type *
4038 read_range_type (char **pp, int typenums[2], int type_size,
4039 struct objfile *objfile)
4041 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4042 char *orig_pp = *pp;
4047 struct type *result_type;
4048 struct type *index_type = NULL;
4050 /* First comes a type we are a subrange of.
4051 In C it is usually 0, 1 or the type being defined. */
4052 if (read_type_number (pp, rangenums) != 0)
4053 return error_type (pp, objfile);
4054 self_subrange = (rangenums[0] == typenums[0] &&
4055 rangenums[1] == typenums[1]);
4060 index_type = read_type (pp, objfile);
4063 /* A semicolon should now follow; skip it. */
4067 /* The remaining two operands are usually lower and upper bounds
4068 of the range. But in some special cases they mean something else. */
4069 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4070 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4072 if (n2bits == -1 || n3bits == -1)
4073 return error_type (pp, objfile);
4076 goto handle_true_range;
4078 /* If limits are huge, must be large integral type. */
4079 if (n2bits != 0 || n3bits != 0)
4081 char got_signed = 0;
4082 char got_unsigned = 0;
4083 /* Number of bits in the type. */
4086 /* If a type size attribute has been specified, the bounds of
4087 the range should fit in this size. If the lower bounds needs
4088 more bits than the upper bound, then the type is signed. */
4089 if (n2bits <= type_size && n3bits <= type_size)
4091 if (n2bits == type_size && n2bits > n3bits)
4097 /* Range from 0 to <large number> is an unsigned large integral type. */
4098 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4103 /* Range from <large number> to <large number>-1 is a large signed
4104 integral type. Take care of the case where <large number> doesn't
4105 fit in a long but <large number>-1 does. */
4106 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4107 || (n2bits != 0 && n3bits == 0
4108 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4115 if (got_signed || got_unsigned)
4117 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
4118 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
4122 return error_type (pp, objfile);
4125 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4126 if (self_subrange && n2 == 0 && n3 == 0)
4127 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4129 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4130 is the width in bytes.
4132 Fortran programs appear to use this for complex types also. To
4133 distinguish between floats and complex, g77 (and others?) seem
4134 to use self-subranges for the complexes, and subranges of int for
4137 Also note that for complexes, g77 sets n2 to the size of one of
4138 the member floats, not the whole complex beast. My guess is that
4139 this was to work well with pre-COMPLEX versions of gdb. */
4141 if (n3 == 0 && n2 > 0)
4143 struct type *float_type
4144 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
4148 struct type *complex_type =
4149 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
4151 TYPE_TARGET_TYPE (complex_type) = float_type;
4152 return complex_type;
4158 /* If the upper bound is -1, it must really be an unsigned integral. */
4160 else if (n2 == 0 && n3 == -1)
4162 int bits = type_size;
4166 /* We don't know its size. It is unsigned int or unsigned
4167 long. GCC 2.3.3 uses this for long long too, but that is
4168 just a GDB 3.5 compatibility hack. */
4169 bits = gdbarch_int_bit (gdbarch);
4172 return init_type (TYPE_CODE_INT, bits / TARGET_CHAR_BIT,
4173 TYPE_FLAG_UNSIGNED, NULL, objfile);
4176 /* Special case: char is defined (Who knows why) as a subrange of
4177 itself with range 0-127. */
4178 else if (self_subrange && n2 == 0 && n3 == 127)
4179 return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile);
4181 /* We used to do this only for subrange of self or subrange of int. */
4184 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4185 "unsigned long", and we already checked for that,
4186 so don't need to test for it here. */
4189 /* n3 actually gives the size. */
4190 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
4193 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4194 unsigned n-byte integer. But do require n to be a power of
4195 two; we don't want 3- and 5-byte integers flying around. */
4201 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4204 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4205 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4209 /* I think this is for Convex "long long". Since I don't know whether
4210 Convex sets self_subrange, I also accept that particular size regardless
4211 of self_subrange. */
4212 else if (n3 == 0 && n2 < 0
4214 || n2 == -gdbarch_long_long_bit
4215 (gdbarch) / TARGET_CHAR_BIT))
4216 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4217 else if (n2 == -n3 - 1)
4220 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4222 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4223 if (n3 == 0x7fffffff)
4224 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4227 /* We have a real range type on our hands. Allocate space and
4228 return a real pointer. */
4232 index_type = objfile_type (objfile)->builtin_int;
4234 index_type = *dbx_lookup_type (rangenums, objfile);
4235 if (index_type == NULL)
4237 /* Does this actually ever happen? Is that why we are worrying
4238 about dealing with it rather than just calling error_type? */
4240 complaint (&symfile_complaints,
4241 _("base type %d of range type is not defined"), rangenums[1]);
4243 index_type = objfile_type (objfile)->builtin_int;
4247 = create_static_range_type ((struct type *) NULL, index_type, n2, n3);
4248 return (result_type);
4251 /* Read in an argument list. This is a list of types, separated by commas
4252 and terminated with END. Return the list of types read in, or NULL
4253 if there is an error. */
4255 static struct field *
4256 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4259 /* FIXME! Remove this arbitrary limit! */
4260 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4267 /* Invalid argument list: no ','. */
4270 STABS_CONTINUE (pp, objfile);
4271 types[n++] = read_type (pp, objfile);
4273 (*pp)++; /* get past `end' (the ':' character). */
4277 /* We should read at least the THIS parameter here. Some broken stabs
4278 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4279 have been present ";-16,(0,43)" reference instead. This way the
4280 excessive ";" marker prematurely stops the parameters parsing. */
4282 complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
4285 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4293 rval = (struct field *) xmalloc (n * sizeof (struct field));
4294 memset (rval, 0, n * sizeof (struct field));
4295 for (i = 0; i < n; i++)
4296 rval[i].type = types[i];
4301 /* Common block handling. */
4303 /* List of symbols declared since the last BCOMM. This list is a tail
4304 of local_symbols. When ECOMM is seen, the symbols on the list
4305 are noted so their proper addresses can be filled in later,
4306 using the common block base address gotten from the assembler
4309 static struct pending *common_block;
4310 static int common_block_i;
4312 /* Name of the current common block. We get it from the BCOMM instead of the
4313 ECOMM to match IBM documentation (even though IBM puts the name both places
4314 like everyone else). */
4315 static char *common_block_name;
4317 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4318 to remain after this function returns. */
4321 common_block_start (char *name, struct objfile *objfile)
4323 if (common_block_name != NULL)
4325 complaint (&symfile_complaints,
4326 _("Invalid symbol data: common block within common block"));
4328 common_block = local_symbols;
4329 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4330 common_block_name = obstack_copy0 (&objfile->objfile_obstack,
4331 name, strlen (name));
4334 /* Process a N_ECOMM symbol. */
4337 common_block_end (struct objfile *objfile)
4339 /* Symbols declared since the BCOMM are to have the common block
4340 start address added in when we know it. common_block and
4341 common_block_i point to the first symbol after the BCOMM in
4342 the local_symbols list; copy the list and hang it off the
4343 symbol for the common block name for later fixup. */
4346 struct pending *new = 0;
4347 struct pending *next;
4350 if (common_block_name == NULL)
4352 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4356 sym = allocate_symbol (objfile);
4357 /* Note: common_block_name already saved on objfile_obstack. */
4358 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4359 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
4361 /* Now we copy all the symbols which have been defined since the BCOMM. */
4363 /* Copy all the struct pendings before common_block. */
4364 for (next = local_symbols;
4365 next != NULL && next != common_block;
4368 for (j = 0; j < next->nsyms; j++)
4369 add_symbol_to_list (next->symbol[j], &new);
4372 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4373 NULL, it means copy all the local symbols (which we already did
4376 if (common_block != NULL)
4377 for (j = common_block_i; j < common_block->nsyms; j++)
4378 add_symbol_to_list (common_block->symbol[j], &new);
4380 SYMBOL_TYPE (sym) = (struct type *) new;
4382 /* Should we be putting local_symbols back to what it was?
4385 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4386 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4387 global_sym_chain[i] = sym;
4388 common_block_name = NULL;
4391 /* Add a common block's start address to the offset of each symbol
4392 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4393 the common block name). */
4396 fix_common_block (struct symbol *sym, CORE_ADDR valu)
4398 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4400 for (; next; next = next->next)
4404 for (j = next->nsyms - 1; j >= 0; j--)
4405 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4411 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4412 See add_undefined_type for more details. */
4415 add_undefined_type_noname (struct type *type, int typenums[2])
4419 nat.typenums[0] = typenums [0];
4420 nat.typenums[1] = typenums [1];
4423 if (noname_undefs_length == noname_undefs_allocated)
4425 noname_undefs_allocated *= 2;
4426 noname_undefs = (struct nat *)
4427 xrealloc ((char *) noname_undefs,
4428 noname_undefs_allocated * sizeof (struct nat));
4430 noname_undefs[noname_undefs_length++] = nat;
4433 /* Add TYPE to the UNDEF_TYPES vector.
4434 See add_undefined_type for more details. */
4437 add_undefined_type_1 (struct type *type)
4439 if (undef_types_length == undef_types_allocated)
4441 undef_types_allocated *= 2;
4442 undef_types = (struct type **)
4443 xrealloc ((char *) undef_types,
4444 undef_types_allocated * sizeof (struct type *));
4446 undef_types[undef_types_length++] = type;
4449 /* What about types defined as forward references inside of a small lexical
4451 /* Add a type to the list of undefined types to be checked through
4452 once this file has been read in.
4454 In practice, we actually maintain two such lists: The first list
4455 (UNDEF_TYPES) is used for types whose name has been provided, and
4456 concerns forward references (eg 'xs' or 'xu' forward references);
4457 the second list (NONAME_UNDEFS) is used for types whose name is
4458 unknown at creation time, because they were referenced through
4459 their type number before the actual type was declared.
4460 This function actually adds the given type to the proper list. */
4463 add_undefined_type (struct type *type, int typenums[2])
4465 if (TYPE_TAG_NAME (type) == NULL)
4466 add_undefined_type_noname (type, typenums);
4468 add_undefined_type_1 (type);
4471 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4474 cleanup_undefined_types_noname (struct objfile *objfile)
4478 for (i = 0; i < noname_undefs_length; i++)
4480 struct nat nat = noname_undefs[i];
4483 type = dbx_lookup_type (nat.typenums, objfile);
4484 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4486 /* The instance flags of the undefined type are still unset,
4487 and needs to be copied over from the reference type.
4488 Since replace_type expects them to be identical, we need
4489 to set these flags manually before hand. */
4490 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4491 replace_type (nat.type, *type);
4495 noname_undefs_length = 0;
4498 /* Go through each undefined type, see if it's still undefined, and fix it
4499 up if possible. We have two kinds of undefined types:
4501 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4502 Fix: update array length using the element bounds
4503 and the target type's length.
4504 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4505 yet defined at the time a pointer to it was made.
4506 Fix: Do a full lookup on the struct/union tag. */
4509 cleanup_undefined_types_1 (void)
4513 /* Iterate over every undefined type, and look for a symbol whose type
4514 matches our undefined type. The symbol matches if:
4515 1. It is a typedef in the STRUCT domain;
4516 2. It has the same name, and same type code;
4517 3. The instance flags are identical.
4519 It is important to check the instance flags, because we have seen
4520 examples where the debug info contained definitions such as:
4522 "foo_t:t30=B31=xefoo_t:"
4524 In this case, we have created an undefined type named "foo_t" whose
4525 instance flags is null (when processing "xefoo_t"), and then created
4526 another type with the same name, but with different instance flags
4527 ('B' means volatile). I think that the definition above is wrong,
4528 since the same type cannot be volatile and non-volatile at the same
4529 time, but we need to be able to cope with it when it happens. The
4530 approach taken here is to treat these two types as different. */
4532 for (type = undef_types; type < undef_types + undef_types_length; type++)
4534 switch (TYPE_CODE (*type))
4537 case TYPE_CODE_STRUCT:
4538 case TYPE_CODE_UNION:
4539 case TYPE_CODE_ENUM:
4541 /* Check if it has been defined since. Need to do this here
4542 as well as in check_typedef to deal with the (legitimate in
4543 C though not C++) case of several types with the same name
4544 in different source files. */
4545 if (TYPE_STUB (*type))
4547 struct pending *ppt;
4549 /* Name of the type, without "struct" or "union". */
4550 const char *typename = TYPE_TAG_NAME (*type);
4552 if (typename == NULL)
4554 complaint (&symfile_complaints, _("need a type name"));
4557 for (ppt = file_symbols; ppt; ppt = ppt->next)
4559 for (i = 0; i < ppt->nsyms; i++)
4561 struct symbol *sym = ppt->symbol[i];
4563 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4564 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4565 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4567 && (TYPE_INSTANCE_FLAGS (*type) ==
4568 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4569 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4571 replace_type (*type, SYMBOL_TYPE (sym));
4580 complaint (&symfile_complaints,
4581 _("forward-referenced types left unresolved, "
4589 undef_types_length = 0;
4592 /* Try to fix all the undefined types we ecountered while processing
4596 cleanup_undefined_stabs_types (struct objfile *objfile)
4598 cleanup_undefined_types_1 ();
4599 cleanup_undefined_types_noname (objfile);
4602 /* Scan through all of the global symbols defined in the object file,
4603 assigning values to the debugging symbols that need to be assigned
4604 to. Get these symbols from the minimal symbol table. */
4607 scan_file_globals (struct objfile *objfile)
4610 struct minimal_symbol *msymbol;
4611 struct symbol *sym, *prev;
4612 struct objfile *resolve_objfile;
4614 /* SVR4 based linkers copy referenced global symbols from shared
4615 libraries to the main executable.
4616 If we are scanning the symbols for a shared library, try to resolve
4617 them from the minimal symbols of the main executable first. */
4619 if (symfile_objfile && objfile != symfile_objfile)
4620 resolve_objfile = symfile_objfile;
4622 resolve_objfile = objfile;
4626 /* Avoid expensive loop through all minimal symbols if there are
4627 no unresolved symbols. */
4628 for (hash = 0; hash < HASHSIZE; hash++)
4630 if (global_sym_chain[hash])
4633 if (hash >= HASHSIZE)
4636 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4640 /* Skip static symbols. */
4641 switch (MSYMBOL_TYPE (msymbol))
4653 /* Get the hash index and check all the symbols
4654 under that hash index. */
4656 hash = hashname (MSYMBOL_LINKAGE_NAME (msymbol));
4658 for (sym = global_sym_chain[hash]; sym;)
4660 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol),
4661 SYMBOL_LINKAGE_NAME (sym)) == 0)
4663 /* Splice this symbol out of the hash chain and
4664 assign the value we have to it. */
4667 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4671 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4674 /* Check to see whether we need to fix up a common block. */
4675 /* Note: this code might be executed several times for
4676 the same symbol if there are multiple references. */
4679 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4681 fix_common_block (sym,
4682 MSYMBOL_VALUE_ADDRESS (resolve_objfile,
4687 SYMBOL_VALUE_ADDRESS (sym)
4688 = MSYMBOL_VALUE_ADDRESS (resolve_objfile, msymbol);
4690 SYMBOL_SECTION (sym) = MSYMBOL_SECTION (msymbol);
4695 sym = SYMBOL_VALUE_CHAIN (prev);
4699 sym = global_sym_chain[hash];
4705 sym = SYMBOL_VALUE_CHAIN (sym);
4709 if (resolve_objfile == objfile)
4711 resolve_objfile = objfile;
4714 /* Change the storage class of any remaining unresolved globals to
4715 LOC_UNRESOLVED and remove them from the chain. */
4716 for (hash = 0; hash < HASHSIZE; hash++)
4718 sym = global_sym_chain[hash];
4722 sym = SYMBOL_VALUE_CHAIN (sym);
4724 /* Change the symbol address from the misleading chain value
4726 SYMBOL_VALUE_ADDRESS (prev) = 0;
4728 /* Complain about unresolved common block symbols. */
4729 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4730 SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
4732 complaint (&symfile_complaints,
4733 _("%s: common block `%s' from "
4734 "global_sym_chain unresolved"),
4735 objfile_name (objfile), SYMBOL_PRINT_NAME (prev));
4738 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4741 /* Initialize anything that needs initializing when starting to read
4742 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4746 stabsread_init (void)
4750 /* Initialize anything that needs initializing when a completely new
4751 symbol file is specified (not just adding some symbols from another
4752 file, e.g. a shared library). */
4755 stabsread_new_init (void)
4757 /* Empty the hash table of global syms looking for values. */
4758 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4761 /* Initialize anything that needs initializing at the same time as
4762 start_symtab() is called. */
4767 global_stabs = NULL; /* AIX COFF */
4768 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4769 n_this_object_header_files = 1;
4770 type_vector_length = 0;
4771 type_vector = (struct type **) 0;
4773 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4774 common_block_name = NULL;
4777 /* Call after end_symtab(). */
4784 xfree (type_vector);
4787 type_vector_length = 0;
4788 previous_stab_code = 0;
4792 finish_global_stabs (struct objfile *objfile)
4796 patch_block_stabs (global_symbols, global_stabs, objfile);
4797 xfree (global_stabs);
4798 global_stabs = NULL;
4802 /* Find the end of the name, delimited by a ':', but don't match
4803 ObjC symbols which look like -[Foo bar::]:bla. */
4805 find_name_end (char *name)
4809 if (s[0] == '-' || *s == '+')
4811 /* Must be an ObjC method symbol. */
4814 error (_("invalid symbol name \"%s\""), name);
4816 s = strchr (s, ']');
4819 error (_("invalid symbol name \"%s\""), name);
4821 return strchr (s, ':');
4825 return strchr (s, ':');
4829 /* Initializer for this module. */
4832 _initialize_stabsread (void)
4834 rs6000_builtin_type_data = register_objfile_data ();
4836 undef_types_allocated = 20;
4837 undef_types_length = 0;
4838 undef_types = (struct type **)
4839 xmalloc (undef_types_allocated * sizeof (struct type *));
4841 noname_undefs_allocated = 20;
4842 noname_undefs_length = 0;
4843 noname_undefs = (struct nat *)
4844 xmalloc (noname_undefs_allocated * sizeof (struct nat));
4846 stab_register_index = register_symbol_register_impl (LOC_REGISTER,
4847 &stab_register_funcs);
4848 stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
4849 &stab_register_funcs);