1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used with many systems that use
22 the a.out object file format, as well as some systems that use
23 COFF or ELF where the stabs data is placed in a special section.
24 Avoid placing any object file format specific code in this file. */
28 #include "gdb_obstack.h"
31 #include "expression.h"
34 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
36 #include "aout/aout64.h"
37 #include "gdb-stabs.h"
39 #include "complaints.h"
41 #include "gdb-demangle.h"
45 #include "cp-support.h"
48 /* Ask stabsread.h to define the vars it normally declares `extern'. */
51 #include "stabsread.h" /* Our own declarations */
54 extern void _initialize_stabsread (void);
58 struct nextfield *next;
60 /* This is the raw visibility from the stab. It is not checked
61 for being one of the visibilities we recognize, so code which
62 examines this field better be able to deal. */
68 struct next_fnfieldlist
70 struct next_fnfieldlist *next;
71 struct fn_fieldlist fn_fieldlist;
74 /* The routines that read and process a complete stabs for a C struct or
75 C++ class pass lists of data member fields and lists of member function
76 fields in an instance of a field_info structure, as defined below.
77 This is part of some reorganization of low level C++ support and is
78 expected to eventually go away... (FIXME) */
82 struct nextfield *list;
83 struct next_fnfieldlist *fnlist;
87 read_one_struct_field (struct field_info *, char **, char *,
88 struct type *, struct objfile *);
90 static struct type *dbx_alloc_type (int[2], struct objfile *);
92 static long read_huge_number (char **, int, int *, int);
94 static struct type *error_type (char **, struct objfile *);
97 patch_block_stabs (struct pending *, struct pending_stabs *,
100 static void fix_common_block (struct symbol *, CORE_ADDR);
102 static int read_type_number (char **, int *);
104 static struct type *read_type (char **, struct objfile *);
106 static struct type *read_range_type (char **, int[2], int, struct objfile *);
108 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
110 static struct type *read_sun_floating_type (char **, int[2],
113 static struct type *read_enum_type (char **, struct type *, struct objfile *);
115 static struct type *rs6000_builtin_type (int, struct objfile *);
118 read_member_functions (struct field_info *, char **, struct type *,
122 read_struct_fields (struct field_info *, char **, struct type *,
126 read_baseclasses (struct field_info *, char **, struct type *,
130 read_tilde_fields (struct field_info *, char **, struct type *,
133 static int attach_fn_fields_to_type (struct field_info *, struct type *);
135 static int attach_fields_to_type (struct field_info *, struct type *,
138 static struct type *read_struct_type (char **, struct type *,
142 static struct type *read_array_type (char **, struct type *,
145 static struct field *read_args (char **, int, struct objfile *, int *, int *);
147 static void add_undefined_type (struct type *, int[2]);
150 read_cpp_abbrev (struct field_info *, char **, struct type *,
153 static char *find_name_end (char *name);
155 static int process_reference (char **string);
157 void stabsread_clear_cache (void);
159 static const char vptr_name[] = "_vptr$";
160 static const char vb_name[] = "_vb$";
163 invalid_cpp_abbrev_complaint (const char *arg1)
165 complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
169 reg_value_complaint (int regnum, int num_regs, const char *sym)
171 complaint (&symfile_complaints,
172 _("bad register number %d (max %d) in symbol %s"),
173 regnum, num_regs - 1, sym);
177 stabs_general_complaint (const char *arg1)
179 complaint (&symfile_complaints, "%s", arg1);
182 /* Make a list of forward references which haven't been defined. */
184 static struct type **undef_types;
185 static int undef_types_allocated;
186 static int undef_types_length;
187 static struct symbol *current_symbol = NULL;
189 /* Make a list of nameless types that are undefined.
190 This happens when another type is referenced by its number
191 before this type is actually defined. For instance "t(0,1)=k(0,2)"
192 and type (0,2) is defined only later. */
199 static struct nat *noname_undefs;
200 static int noname_undefs_allocated;
201 static int noname_undefs_length;
203 /* Check for and handle cretinous stabs symbol name continuation! */
204 #define STABS_CONTINUE(pp,objfile) \
206 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
207 *(pp) = next_symbol_text (objfile); \
210 /* Vector of types defined so far, indexed by their type numbers.
211 (In newer sun systems, dbx uses a pair of numbers in parens,
212 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
213 Then these numbers must be translated through the type_translations
214 hash table to get the index into the type vector.) */
216 static struct type **type_vector;
218 /* Number of elements allocated for type_vector currently. */
220 static int type_vector_length;
222 /* Initial size of type vector. Is realloc'd larger if needed, and
223 realloc'd down to the size actually used, when completed. */
225 #define INITIAL_TYPE_VECTOR_LENGTH 160
228 /* Look up a dbx type-number pair. Return the address of the slot
229 where the type for that number-pair is stored.
230 The number-pair is in TYPENUMS.
232 This can be used for finding the type associated with that pair
233 or for associating a new type with the pair. */
235 static struct type **
236 dbx_lookup_type (int typenums[2], struct objfile *objfile)
238 int filenum = typenums[0];
239 int index = typenums[1];
242 struct header_file *f;
245 if (filenum == -1) /* -1,-1 is for temporary types. */
248 if (filenum < 0 || filenum >= n_this_object_header_files)
250 complaint (&symfile_complaints,
251 _("Invalid symbol data: type number "
252 "(%d,%d) out of range at symtab pos %d."),
253 filenum, index, symnum);
261 /* Caller wants address of address of type. We think
262 that negative (rs6k builtin) types will never appear as
263 "lvalues", (nor should they), so we stuff the real type
264 pointer into a temp, and return its address. If referenced,
265 this will do the right thing. */
266 static struct type *temp_type;
268 temp_type = rs6000_builtin_type (index, objfile);
272 /* Type is defined outside of header files.
273 Find it in this object file's type vector. */
274 if (index >= type_vector_length)
276 old_len = type_vector_length;
279 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
280 type_vector = XNEWVEC (struct type *, type_vector_length);
282 while (index >= type_vector_length)
284 type_vector_length *= 2;
286 type_vector = (struct type **)
287 xrealloc ((char *) type_vector,
288 (type_vector_length * sizeof (struct type *)));
289 memset (&type_vector[old_len], 0,
290 (type_vector_length - old_len) * sizeof (struct type *));
292 return (&type_vector[index]);
296 real_filenum = this_object_header_files[filenum];
298 if (real_filenum >= N_HEADER_FILES (objfile))
300 static struct type *temp_type;
302 warning (_("GDB internal error: bad real_filenum"));
305 temp_type = objfile_type (objfile)->builtin_error;
309 f = HEADER_FILES (objfile) + real_filenum;
311 f_orig_length = f->length;
312 if (index >= f_orig_length)
314 while (index >= f->length)
318 f->vector = (struct type **)
319 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
320 memset (&f->vector[f_orig_length], 0,
321 (f->length - f_orig_length) * sizeof (struct type *));
323 return (&f->vector[index]);
327 /* Make sure there is a type allocated for type numbers TYPENUMS
328 and return the type object.
329 This can create an empty (zeroed) type object.
330 TYPENUMS may be (-1, -1) to return a new type object that is not
331 put into the type vector, and so may not be referred to by number. */
334 dbx_alloc_type (int typenums[2], struct objfile *objfile)
336 struct type **type_addr;
338 if (typenums[0] == -1)
340 return (alloc_type (objfile));
343 type_addr = dbx_lookup_type (typenums, objfile);
345 /* If we are referring to a type not known at all yet,
346 allocate an empty type for it.
347 We will fill it in later if we find out how. */
350 *type_addr = alloc_type (objfile);
356 /* for all the stabs in a given stab vector, build appropriate types
357 and fix their symbols in given symbol vector. */
360 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
361 struct objfile *objfile)
370 /* for all the stab entries, find their corresponding symbols and
371 patch their types! */
373 for (ii = 0; ii < stabs->count; ++ii)
375 name = stabs->stab[ii];
376 pp = (char *) strchr (name, ':');
377 gdb_assert (pp); /* Must find a ':' or game's over. */
381 pp = (char *) strchr (pp, ':');
383 sym = find_symbol_in_list (symbols, name, pp - name);
386 /* FIXME-maybe: it would be nice if we noticed whether
387 the variable was defined *anywhere*, not just whether
388 it is defined in this compilation unit. But neither
389 xlc or GCC seem to need such a definition, and until
390 we do psymtabs (so that the minimal symbols from all
391 compilation units are available now), I'm not sure
392 how to get the information. */
394 /* On xcoff, if a global is defined and never referenced,
395 ld will remove it from the executable. There is then
396 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
397 sym = allocate_symbol (objfile);
398 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
399 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
400 SYMBOL_SET_LINKAGE_NAME
401 (sym, (char *) obstack_copy0 (&objfile->objfile_obstack,
404 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
406 /* I don't think the linker does this with functions,
407 so as far as I know this is never executed.
408 But it doesn't hurt to check. */
410 lookup_function_type (read_type (&pp, objfile));
414 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
416 add_symbol_to_list (sym, &global_symbols);
421 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
424 lookup_function_type (read_type (&pp, objfile));
428 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
436 /* Read a number by which a type is referred to in dbx data,
437 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
438 Just a single number N is equivalent to (0,N).
439 Return the two numbers by storing them in the vector TYPENUMS.
440 TYPENUMS will then be used as an argument to dbx_lookup_type.
442 Returns 0 for success, -1 for error. */
445 read_type_number (char **pp, int *typenums)
452 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
455 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
462 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
470 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
471 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
472 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
473 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
475 /* Structure for storing pointers to reference definitions for fast lookup
476 during "process_later". */
485 #define MAX_CHUNK_REFS 100
486 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
487 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
489 static struct ref_map *ref_map;
491 /* Ptr to free cell in chunk's linked list. */
492 static int ref_count = 0;
494 /* Number of chunks malloced. */
495 static int ref_chunk = 0;
497 /* This file maintains a cache of stabs aliases found in the symbol
498 table. If the symbol table changes, this cache must be cleared
499 or we are left holding onto data in invalid obstacks. */
501 stabsread_clear_cache (void)
507 /* Create array of pointers mapping refids to symbols and stab strings.
508 Add pointers to reference definition symbols and/or their values as we
509 find them, using their reference numbers as our index.
510 These will be used later when we resolve references. */
512 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
516 if (refnum >= ref_count)
517 ref_count = refnum + 1;
518 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
520 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
521 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
523 ref_map = (struct ref_map *)
524 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
525 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
526 new_chunks * REF_CHUNK_SIZE);
527 ref_chunk += new_chunks;
529 ref_map[refnum].stabs = stabs;
530 ref_map[refnum].sym = sym;
531 ref_map[refnum].value = value;
534 /* Return defined sym for the reference REFNUM. */
536 ref_search (int refnum)
538 if (refnum < 0 || refnum > ref_count)
540 return ref_map[refnum].sym;
543 /* Parse a reference id in STRING and return the resulting
544 reference number. Move STRING beyond the reference id. */
547 process_reference (char **string)
555 /* Advance beyond the initial '#'. */
558 /* Read number as reference id. */
559 while (*p && isdigit (*p))
561 refnum = refnum * 10 + *p - '0';
568 /* If STRING defines a reference, store away a pointer to the reference
569 definition for later use. Return the reference number. */
572 symbol_reference_defined (char **string)
577 refnum = process_reference (&p);
579 /* Defining symbols end in '='. */
582 /* Symbol is being defined here. */
588 /* Must be a reference. Either the symbol has already been defined,
589 or this is a forward reference to it. */
596 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
598 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
601 || regno >= (gdbarch_num_regs (gdbarch)
602 + gdbarch_num_pseudo_regs (gdbarch)))
604 reg_value_complaint (regno,
605 gdbarch_num_regs (gdbarch)
606 + gdbarch_num_pseudo_regs (gdbarch),
607 SYMBOL_PRINT_NAME (sym));
609 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless. */
615 static const struct symbol_register_ops stab_register_funcs = {
619 /* The "aclass" indices for computed symbols. */
621 static int stab_register_index;
622 static int stab_regparm_index;
625 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
626 struct objfile *objfile)
628 struct gdbarch *gdbarch = get_objfile_arch (objfile);
630 char *p = (char *) find_name_end (string);
634 char *new_name = NULL;
636 /* We would like to eliminate nameless symbols, but keep their types.
637 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
638 to type 2, but, should not create a symbol to address that type. Since
639 the symbol will be nameless, there is no way any user can refer to it. */
643 /* Ignore syms with empty names. */
647 /* Ignore old-style symbols from cc -go. */
657 complaint (&symfile_complaints,
658 _("Bad stabs string '%s'"), string);
663 /* If a nameless stab entry, all we need is the type, not the symbol.
664 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
665 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
667 current_symbol = sym = allocate_symbol (objfile);
669 if (processing_gcc_compilation)
671 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
672 number of bytes occupied by a type or object, which we ignore. */
673 SYMBOL_LINE (sym) = desc;
677 SYMBOL_LINE (sym) = 0; /* unknown */
680 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
681 &objfile->objfile_obstack);
683 if (is_cplus_marker (string[0]))
685 /* Special GNU C++ names. */
689 SYMBOL_SET_LINKAGE_NAME (sym, "this");
692 case 'v': /* $vtbl_ptr_type */
696 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
700 /* This was an anonymous type that was never fixed up. */
704 /* SunPRO (3.0 at least) static variable encoding. */
705 if (gdbarch_static_transform_name_p (gdbarch))
707 /* ... fall through ... */
710 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
712 goto normal; /* Do *something* with it. */
718 if (SYMBOL_LANGUAGE (sym) == language_cplus)
720 char *name = (char *) alloca (p - string + 1);
722 memcpy (name, string, p - string);
723 name[p - string] = '\0';
724 new_name = cp_canonicalize_string (name);
726 if (new_name != NULL)
728 SYMBOL_SET_NAMES (sym, new_name, strlen (new_name), 1, objfile);
732 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
734 if (SYMBOL_LANGUAGE (sym) == language_cplus)
735 cp_scan_for_anonymous_namespaces (sym, objfile);
740 /* Determine the type of name being defined. */
742 /* Getting GDB to correctly skip the symbol on an undefined symbol
743 descriptor and not ever dump core is a very dodgy proposition if
744 we do things this way. I say the acorn RISC machine can just
745 fix their compiler. */
746 /* The Acorn RISC machine's compiler can put out locals that don't
747 start with "234=" or "(3,4)=", so assume anything other than the
748 deftypes we know how to handle is a local. */
749 if (!strchr ("cfFGpPrStTvVXCR", *p))
751 if (isdigit (*p) || *p == '(' || *p == '-')
760 /* c is a special case, not followed by a type-number.
761 SYMBOL:c=iVALUE for an integer constant symbol.
762 SYMBOL:c=rVALUE for a floating constant symbol.
763 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
764 e.g. "b:c=e6,0" for "const b = blob1"
765 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
768 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
769 SYMBOL_TYPE (sym) = error_type (&p, objfile);
770 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
771 add_symbol_to_list (sym, &file_symbols);
781 struct type *dbl_type;
783 /* FIXME-if-picky-about-floating-accuracy: Should be using
784 target arithmetic to get the value. real.c in GCC
785 probably has the necessary code. */
787 dbl_type = objfile_type (objfile)->builtin_double;
789 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack,
790 TYPE_LENGTH (dbl_type));
791 store_typed_floating (dbl_valu, dbl_type, d);
793 SYMBOL_TYPE (sym) = dbl_type;
794 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
795 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
800 /* Defining integer constants this way is kind of silly,
801 since 'e' constants allows the compiler to give not
802 only the value, but the type as well. C has at least
803 int, long, unsigned int, and long long as constant
804 types; other languages probably should have at least
805 unsigned as well as signed constants. */
807 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
808 SYMBOL_VALUE (sym) = atoi (p);
809 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
815 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
816 SYMBOL_VALUE (sym) = atoi (p);
817 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
823 struct type *range_type;
826 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
827 gdb_byte *string_value;
829 if (quote != '\'' && quote != '"')
831 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
832 SYMBOL_TYPE (sym) = error_type (&p, objfile);
833 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
834 add_symbol_to_list (sym, &file_symbols);
838 /* Find matching quote, rejecting escaped quotes. */
839 while (*p && *p != quote)
841 if (*p == '\\' && p[1] == quote)
843 string_local[ind] = (gdb_byte) quote;
849 string_local[ind] = (gdb_byte) (*p);
856 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
857 SYMBOL_TYPE (sym) = error_type (&p, objfile);
858 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
859 add_symbol_to_list (sym, &file_symbols);
863 /* NULL terminate the string. */
864 string_local[ind] = 0;
866 = create_static_range_type (NULL,
867 objfile_type (objfile)->builtin_int,
869 SYMBOL_TYPE (sym) = create_array_type (NULL,
870 objfile_type (objfile)->builtin_char,
873 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, ind + 1);
874 memcpy (string_value, string_local, ind + 1);
877 SYMBOL_VALUE_BYTES (sym) = string_value;
878 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
883 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
884 can be represented as integral.
885 e.g. "b:c=e6,0" for "const b = blob1"
886 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
888 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
889 SYMBOL_TYPE (sym) = read_type (&p, objfile);
893 SYMBOL_TYPE (sym) = error_type (&p, objfile);
898 /* If the value is too big to fit in an int (perhaps because
899 it is unsigned), or something like that, we silently get
900 a bogus value. The type and everything else about it is
901 correct. Ideally, we should be using whatever we have
902 available for parsing unsigned and long long values,
904 SYMBOL_VALUE (sym) = atoi (p);
909 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
910 SYMBOL_TYPE (sym) = error_type (&p, objfile);
913 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
914 add_symbol_to_list (sym, &file_symbols);
918 /* The name of a caught exception. */
919 SYMBOL_TYPE (sym) = read_type (&p, objfile);
920 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
921 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
922 SYMBOL_VALUE_ADDRESS (sym) = valu;
923 add_symbol_to_list (sym, &local_symbols);
927 /* A static function definition. */
928 SYMBOL_TYPE (sym) = read_type (&p, objfile);
929 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
930 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
931 add_symbol_to_list (sym, &file_symbols);
932 /* fall into process_function_types. */
934 process_function_types:
935 /* Function result types are described as the result type in stabs.
936 We need to convert this to the function-returning-type-X type
937 in GDB. E.g. "int" is converted to "function returning int". */
938 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
939 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
941 /* All functions in C++ have prototypes. Stabs does not offer an
942 explicit way to identify prototyped or unprototyped functions,
943 but both GCC and Sun CC emit stabs for the "call-as" type rather
944 than the "declared-as" type for unprototyped functions, so
945 we treat all functions as if they were prototyped. This is used
946 primarily for promotion when calling the function from GDB. */
947 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
949 /* fall into process_prototype_types. */
951 process_prototype_types:
952 /* Sun acc puts declared types of arguments here. */
955 struct type *ftype = SYMBOL_TYPE (sym);
960 /* Obtain a worst case guess for the number of arguments
961 by counting the semicolons. */
968 /* Allocate parameter information fields and fill them in. */
969 TYPE_FIELDS (ftype) = (struct field *)
970 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
975 /* A type number of zero indicates the start of varargs.
976 FIXME: GDB currently ignores vararg functions. */
977 if (p[0] == '0' && p[1] == '\0')
979 ptype = read_type (&p, objfile);
981 /* The Sun compilers mark integer arguments, which should
982 be promoted to the width of the calling conventions, with
983 a type which references itself. This type is turned into
984 a TYPE_CODE_VOID type by read_type, and we have to turn
985 it back into builtin_int here.
986 FIXME: Do we need a new builtin_promoted_int_arg ? */
987 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
988 ptype = objfile_type (objfile)->builtin_int;
989 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
990 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
992 TYPE_NFIELDS (ftype) = nparams;
993 TYPE_PROTOTYPED (ftype) = 1;
998 /* A global function definition. */
999 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1000 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1001 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1002 add_symbol_to_list (sym, &global_symbols);
1003 goto process_function_types;
1006 /* For a class G (global) symbol, it appears that the
1007 value is not correct. It is necessary to search for the
1008 corresponding linker definition to find the value.
1009 These definitions appear at the end of the namelist. */
1010 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1011 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1012 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1013 /* Don't add symbol references to global_sym_chain.
1014 Symbol references don't have valid names and wont't match up with
1015 minimal symbols when the global_sym_chain is relocated.
1016 We'll fixup symbol references when we fixup the defining symbol. */
1017 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1019 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1020 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1021 global_sym_chain[i] = sym;
1023 add_symbol_to_list (sym, &global_symbols);
1026 /* This case is faked by a conditional above,
1027 when there is no code letter in the dbx data.
1028 Dbx data never actually contains 'l'. */
1031 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1032 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1033 SYMBOL_VALUE (sym) = valu;
1034 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1035 add_symbol_to_list (sym, &local_symbols);
1040 /* pF is a two-letter code that means a function parameter in Fortran.
1041 The type-number specifies the type of the return value.
1042 Translate it into a pointer-to-function type. */
1046 = lookup_pointer_type
1047 (lookup_function_type (read_type (&p, objfile)));
1050 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1052 SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
1053 SYMBOL_VALUE (sym) = valu;
1054 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1055 SYMBOL_IS_ARGUMENT (sym) = 1;
1056 add_symbol_to_list (sym, &local_symbols);
1058 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1060 /* On little-endian machines, this crud is never necessary,
1061 and, if the extra bytes contain garbage, is harmful. */
1065 /* If it's gcc-compiled, if it says `short', believe it. */
1066 if (processing_gcc_compilation
1067 || gdbarch_believe_pcc_promotion (gdbarch))
1070 if (!gdbarch_believe_pcc_promotion (gdbarch))
1072 /* If PCC says a parameter is a short or a char, it is
1074 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1075 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1076 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1079 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1080 ? objfile_type (objfile)->builtin_unsigned_int
1081 : objfile_type (objfile)->builtin_int;
1087 /* acc seems to use P to declare the prototypes of functions that
1088 are referenced by this file. gdb is not prepared to deal
1089 with this extra information. FIXME, it ought to. */
1092 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1093 goto process_prototype_types;
1098 /* Parameter which is in a register. */
1099 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1100 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1101 SYMBOL_IS_ARGUMENT (sym) = 1;
1102 SYMBOL_VALUE (sym) = valu;
1103 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1104 add_symbol_to_list (sym, &local_symbols);
1108 /* Register variable (either global or local). */
1109 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1110 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1111 SYMBOL_VALUE (sym) = valu;
1112 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1113 if (within_function)
1115 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1116 the same name to represent an argument passed in a
1117 register. GCC uses 'P' for the same case. So if we find
1118 such a symbol pair we combine it into one 'P' symbol.
1119 For Sun cc we need to do this regardless of
1120 stabs_argument_has_addr, because the compiler puts out
1121 the 'p' symbol even if it never saves the argument onto
1124 On most machines, we want to preserve both symbols, so
1125 that we can still get information about what is going on
1126 with the stack (VAX for computing args_printed, using
1127 stack slots instead of saved registers in backtraces,
1130 Note that this code illegally combines
1131 main(argc) struct foo argc; { register struct foo argc; }
1132 but this case is considered pathological and causes a warning
1133 from a decent compiler. */
1136 && local_symbols->nsyms > 0
1137 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1139 struct symbol *prev_sym;
1141 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1142 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1143 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1144 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1145 SYMBOL_LINKAGE_NAME (sym)) == 0)
1147 SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
1148 /* Use the type from the LOC_REGISTER; that is the type
1149 that is actually in that register. */
1150 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1151 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1156 add_symbol_to_list (sym, &local_symbols);
1159 add_symbol_to_list (sym, &file_symbols);
1163 /* Static symbol at top level of file. */
1164 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1165 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1166 SYMBOL_VALUE_ADDRESS (sym) = valu;
1167 if (gdbarch_static_transform_name_p (gdbarch)
1168 && gdbarch_static_transform_name (gdbarch,
1169 SYMBOL_LINKAGE_NAME (sym))
1170 != SYMBOL_LINKAGE_NAME (sym))
1172 struct bound_minimal_symbol msym;
1174 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1176 if (msym.minsym != NULL)
1178 const char *new_name = gdbarch_static_transform_name
1179 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1181 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1182 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1185 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1186 add_symbol_to_list (sym, &file_symbols);
1190 /* In Ada, there is no distinction between typedef and non-typedef;
1191 any type declaration implicitly has the equivalent of a typedef,
1192 and thus 't' is in fact equivalent to 'Tt'.
1194 Therefore, for Ada units, we check the character immediately
1195 before the 't', and if we do not find a 'T', then make sure to
1196 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1197 will be stored in the VAR_DOMAIN). If the symbol was indeed
1198 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1199 elsewhere, so we don't need to take care of that.
1201 This is important to do, because of forward references:
1202 The cleanup of undefined types stored in undef_types only uses
1203 STRUCT_DOMAIN symbols to perform the replacement. */
1204 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1207 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1209 /* For a nameless type, we don't want a create a symbol, thus we
1210 did not use `sym'. Return without further processing. */
1214 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1215 SYMBOL_VALUE (sym) = valu;
1216 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1217 /* C++ vagaries: we may have a type which is derived from
1218 a base type which did not have its name defined when the
1219 derived class was output. We fill in the derived class's
1220 base part member's name here in that case. */
1221 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1222 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1223 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1224 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1228 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1229 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1230 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1231 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1234 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1236 /* gcc-2.6 or later (when using -fvtable-thunks)
1237 emits a unique named type for a vtable entry.
1238 Some gdb code depends on that specific name. */
1239 extern const char vtbl_ptr_name[];
1241 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1242 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1243 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1245 /* If we are giving a name to a type such as "pointer to
1246 foo" or "function returning foo", we better not set
1247 the TYPE_NAME. If the program contains "typedef char
1248 *caddr_t;", we don't want all variables of type char
1249 * to print as caddr_t. This is not just a
1250 consequence of GDB's type management; PCC and GCC (at
1251 least through version 2.4) both output variables of
1252 either type char * or caddr_t with the type number
1253 defined in the 't' symbol for caddr_t. If a future
1254 compiler cleans this up it GDB is not ready for it
1255 yet, but if it becomes ready we somehow need to
1256 disable this check (without breaking the PCC/GCC2.4
1261 Fortunately, this check seems not to be necessary
1262 for anything except pointers or functions. */
1263 /* ezannoni: 2000-10-26. This seems to apply for
1264 versions of gcc older than 2.8. This was the original
1265 problem: with the following code gdb would tell that
1266 the type for name1 is caddr_t, and func is char().
1268 typedef char *caddr_t;
1280 /* Pascal accepts names for pointer types. */
1281 if (current_subfile->language == language_pascal)
1283 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1287 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1290 add_symbol_to_list (sym, &file_symbols);
1294 /* Create the STRUCT_DOMAIN clone. */
1295 struct symbol *struct_sym = allocate_symbol (objfile);
1298 SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
1299 SYMBOL_VALUE (struct_sym) = valu;
1300 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1301 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1302 TYPE_NAME (SYMBOL_TYPE (sym))
1303 = obconcat (&objfile->objfile_obstack,
1304 SYMBOL_LINKAGE_NAME (sym),
1306 add_symbol_to_list (struct_sym, &file_symbols);
1312 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1313 by 't' which means we are typedef'ing it as well. */
1314 synonym = *p == 't';
1319 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1321 /* For a nameless type, we don't want a create a symbol, thus we
1322 did not use `sym'. Return without further processing. */
1326 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1327 SYMBOL_VALUE (sym) = valu;
1328 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1329 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1330 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1331 = obconcat (&objfile->objfile_obstack,
1332 SYMBOL_LINKAGE_NAME (sym),
1334 add_symbol_to_list (sym, &file_symbols);
1338 /* Clone the sym and then modify it. */
1339 struct symbol *typedef_sym = allocate_symbol (objfile);
1341 *typedef_sym = *sym;
1342 SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
1343 SYMBOL_VALUE (typedef_sym) = valu;
1344 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1345 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1346 TYPE_NAME (SYMBOL_TYPE (sym))
1347 = obconcat (&objfile->objfile_obstack,
1348 SYMBOL_LINKAGE_NAME (sym),
1350 add_symbol_to_list (typedef_sym, &file_symbols);
1355 /* Static symbol of local scope. */
1356 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1357 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1358 SYMBOL_VALUE_ADDRESS (sym) = valu;
1359 if (gdbarch_static_transform_name_p (gdbarch)
1360 && gdbarch_static_transform_name (gdbarch,
1361 SYMBOL_LINKAGE_NAME (sym))
1362 != SYMBOL_LINKAGE_NAME (sym))
1364 struct bound_minimal_symbol msym;
1366 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1368 if (msym.minsym != NULL)
1370 const char *new_name = gdbarch_static_transform_name
1371 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1373 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1374 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1377 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1378 add_symbol_to_list (sym, &local_symbols);
1382 /* Reference parameter */
1383 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1384 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1385 SYMBOL_IS_ARGUMENT (sym) = 1;
1386 SYMBOL_VALUE (sym) = valu;
1387 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1388 add_symbol_to_list (sym, &local_symbols);
1392 /* Reference parameter which is in a register. */
1393 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1394 SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
1395 SYMBOL_IS_ARGUMENT (sym) = 1;
1396 SYMBOL_VALUE (sym) = valu;
1397 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1398 add_symbol_to_list (sym, &local_symbols);
1402 /* This is used by Sun FORTRAN for "function result value".
1403 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1404 that Pascal uses it too, but when I tried it Pascal used
1405 "x:3" (local symbol) instead. */
1406 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1407 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1408 SYMBOL_VALUE (sym) = valu;
1409 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1410 add_symbol_to_list (sym, &local_symbols);
1414 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1415 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
1416 SYMBOL_VALUE (sym) = 0;
1417 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1418 add_symbol_to_list (sym, &file_symbols);
1422 /* Some systems pass variables of certain types by reference instead
1423 of by value, i.e. they will pass the address of a structure (in a
1424 register or on the stack) instead of the structure itself. */
1426 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1427 && SYMBOL_IS_ARGUMENT (sym))
1429 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1430 variables passed in a register). */
1431 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1432 SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
1433 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1434 and subsequent arguments on SPARC, for example). */
1435 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1436 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1442 /* Skip rest of this symbol and return an error type.
1444 General notes on error recovery: error_type always skips to the
1445 end of the symbol (modulo cretinous dbx symbol name continuation).
1446 Thus code like this:
1448 if (*(*pp)++ != ';')
1449 return error_type (pp, objfile);
1451 is wrong because if *pp starts out pointing at '\0' (typically as the
1452 result of an earlier error), it will be incremented to point to the
1453 start of the next symbol, which might produce strange results, at least
1454 if you run off the end of the string table. Instead use
1457 return error_type (pp, objfile);
1463 foo = error_type (pp, objfile);
1467 And in case it isn't obvious, the point of all this hair is so the compiler
1468 can define new types and new syntaxes, and old versions of the
1469 debugger will be able to read the new symbol tables. */
1471 static struct type *
1472 error_type (char **pp, struct objfile *objfile)
1474 complaint (&symfile_complaints,
1475 _("couldn't parse type; debugger out of date?"));
1478 /* Skip to end of symbol. */
1479 while (**pp != '\0')
1484 /* Check for and handle cretinous dbx symbol name continuation! */
1485 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1487 *pp = next_symbol_text (objfile);
1494 return objfile_type (objfile)->builtin_error;
1498 /* Read type information or a type definition; return the type. Even
1499 though this routine accepts either type information or a type
1500 definition, the distinction is relevant--some parts of stabsread.c
1501 assume that type information starts with a digit, '-', or '(' in
1502 deciding whether to call read_type. */
1504 static struct type *
1505 read_type (char **pp, struct objfile *objfile)
1507 struct type *type = 0;
1510 char type_descriptor;
1512 /* Size in bits of type if specified by a type attribute, or -1 if
1513 there is no size attribute. */
1516 /* Used to distinguish string and bitstring from char-array and set. */
1519 /* Used to distinguish vector from array. */
1522 /* Read type number if present. The type number may be omitted.
1523 for instance in a two-dimensional array declared with type
1524 "ar1;1;10;ar1;1;10;4". */
1525 if ((**pp >= '0' && **pp <= '9')
1529 if (read_type_number (pp, typenums) != 0)
1530 return error_type (pp, objfile);
1534 /* Type is not being defined here. Either it already
1535 exists, or this is a forward reference to it.
1536 dbx_alloc_type handles both cases. */
1537 type = dbx_alloc_type (typenums, objfile);
1539 /* If this is a forward reference, arrange to complain if it
1540 doesn't get patched up by the time we're done
1542 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1543 add_undefined_type (type, typenums);
1548 /* Type is being defined here. */
1550 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1555 /* 'typenums=' not present, type is anonymous. Read and return
1556 the definition, but don't put it in the type vector. */
1557 typenums[0] = typenums[1] = -1;
1562 type_descriptor = (*pp)[-1];
1563 switch (type_descriptor)
1567 enum type_code code;
1569 /* Used to index through file_symbols. */
1570 struct pending *ppt;
1573 /* Name including "struct", etc. */
1577 char *from, *to, *p, *q1, *q2;
1579 /* Set the type code according to the following letter. */
1583 code = TYPE_CODE_STRUCT;
1586 code = TYPE_CODE_UNION;
1589 code = TYPE_CODE_ENUM;
1593 /* Complain and keep going, so compilers can invent new
1594 cross-reference types. */
1595 complaint (&symfile_complaints,
1596 _("Unrecognized cross-reference type `%c'"),
1598 code = TYPE_CODE_STRUCT;
1603 q1 = strchr (*pp, '<');
1604 p = strchr (*pp, ':');
1606 return error_type (pp, objfile);
1607 if (q1 && p > q1 && p[1] == ':')
1609 int nesting_level = 0;
1611 for (q2 = q1; *q2; q2++)
1615 else if (*q2 == '>')
1617 else if (*q2 == ':' && nesting_level == 0)
1622 return error_type (pp, objfile);
1625 if (current_subfile->language == language_cplus)
1627 char *new_name, *name = (char *) alloca (p - *pp + 1);
1629 memcpy (name, *pp, p - *pp);
1630 name[p - *pp] = '\0';
1631 new_name = cp_canonicalize_string (name);
1632 if (new_name != NULL)
1635 = (char *) obstack_copy0 (&objfile->objfile_obstack,
1636 new_name, strlen (new_name));
1640 if (type_name == NULL)
1642 to = type_name = (char *)
1643 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1645 /* Copy the name. */
1652 /* Set the pointer ahead of the name which we just read, and
1657 /* If this type has already been declared, then reuse the same
1658 type, rather than allocating a new one. This saves some
1661 for (ppt = file_symbols; ppt; ppt = ppt->next)
1662 for (i = 0; i < ppt->nsyms; i++)
1664 struct symbol *sym = ppt->symbol[i];
1666 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1667 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1668 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1669 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1671 obstack_free (&objfile->objfile_obstack, type_name);
1672 type = SYMBOL_TYPE (sym);
1673 if (typenums[0] != -1)
1674 *dbx_lookup_type (typenums, objfile) = type;
1679 /* Didn't find the type to which this refers, so we must
1680 be dealing with a forward reference. Allocate a type
1681 structure for it, and keep track of it so we can
1682 fill in the rest of the fields when we get the full
1684 type = dbx_alloc_type (typenums, objfile);
1685 TYPE_CODE (type) = code;
1686 TYPE_TAG_NAME (type) = type_name;
1687 INIT_CPLUS_SPECIFIC (type);
1688 TYPE_STUB (type) = 1;
1690 add_undefined_type (type, typenums);
1694 case '-': /* RS/6000 built-in type */
1708 /* We deal with something like t(1,2)=(3,4)=... which
1709 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1711 /* Allocate and enter the typedef type first.
1712 This handles recursive types. */
1713 type = dbx_alloc_type (typenums, objfile);
1714 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1716 struct type *xtype = read_type (pp, objfile);
1720 /* It's being defined as itself. That means it is "void". */
1721 TYPE_CODE (type) = TYPE_CODE_VOID;
1722 TYPE_LENGTH (type) = 1;
1724 else if (type_size >= 0 || is_string)
1726 /* This is the absolute wrong way to construct types. Every
1727 other debug format has found a way around this problem and
1728 the related problems with unnecessarily stubbed types;
1729 someone motivated should attempt to clean up the issue
1730 here as well. Once a type pointed to has been created it
1731 should not be modified.
1733 Well, it's not *absolutely* wrong. Constructing recursive
1734 types (trees, linked lists) necessarily entails modifying
1735 types after creating them. Constructing any loop structure
1736 entails side effects. The Dwarf 2 reader does handle this
1737 more gracefully (it never constructs more than once
1738 instance of a type object, so it doesn't have to copy type
1739 objects wholesale), but it still mutates type objects after
1740 other folks have references to them.
1742 Keep in mind that this circularity/mutation issue shows up
1743 at the source language level, too: C's "incomplete types",
1744 for example. So the proper cleanup, I think, would be to
1745 limit GDB's type smashing to match exactly those required
1746 by the source language. So GDB could have a
1747 "complete_this_type" function, but never create unnecessary
1748 copies of a type otherwise. */
1749 replace_type (type, xtype);
1750 TYPE_NAME (type) = NULL;
1751 TYPE_TAG_NAME (type) = NULL;
1755 TYPE_TARGET_STUB (type) = 1;
1756 TYPE_TARGET_TYPE (type) = xtype;
1761 /* In the following types, we must be sure to overwrite any existing
1762 type that the typenums refer to, rather than allocating a new one
1763 and making the typenums point to the new one. This is because there
1764 may already be pointers to the existing type (if it had been
1765 forward-referenced), and we must change it to a pointer, function,
1766 reference, or whatever, *in-place*. */
1768 case '*': /* Pointer to another type */
1769 type1 = read_type (pp, objfile);
1770 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1773 case '&': /* Reference to another type */
1774 type1 = read_type (pp, objfile);
1775 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
1778 case 'f': /* Function returning another type */
1779 type1 = read_type (pp, objfile);
1780 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1783 case 'g': /* Prototyped function. (Sun) */
1785 /* Unresolved questions:
1787 - According to Sun's ``STABS Interface Manual'', for 'f'
1788 and 'F' symbol descriptors, a `0' in the argument type list
1789 indicates a varargs function. But it doesn't say how 'g'
1790 type descriptors represent that info. Someone with access
1791 to Sun's toolchain should try it out.
1793 - According to the comment in define_symbol (search for
1794 `process_prototype_types:'), Sun emits integer arguments as
1795 types which ref themselves --- like `void' types. Do we
1796 have to deal with that here, too? Again, someone with
1797 access to Sun's toolchain should try it out and let us
1800 const char *type_start = (*pp) - 1;
1801 struct type *return_type = read_type (pp, objfile);
1802 struct type *func_type
1803 = make_function_type (return_type,
1804 dbx_lookup_type (typenums, objfile));
1807 struct type_list *next;
1811 while (**pp && **pp != '#')
1813 struct type *arg_type = read_type (pp, objfile);
1814 struct type_list *newobj = XALLOCA (struct type_list);
1815 newobj->type = arg_type;
1816 newobj->next = arg_types;
1824 complaint (&symfile_complaints,
1825 _("Prototyped function type didn't "
1826 "end arguments with `#':\n%s"),
1830 /* If there is just one argument whose type is `void', then
1831 that's just an empty argument list. */
1833 && ! arg_types->next
1834 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1837 TYPE_FIELDS (func_type)
1838 = (struct field *) TYPE_ALLOC (func_type,
1839 num_args * sizeof (struct field));
1840 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1843 struct type_list *t;
1845 /* We stuck each argument type onto the front of the list
1846 when we read it, so the list is reversed. Build the
1847 fields array right-to-left. */
1848 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1849 TYPE_FIELD_TYPE (func_type, i) = t->type;
1851 TYPE_NFIELDS (func_type) = num_args;
1852 TYPE_PROTOTYPED (func_type) = 1;
1858 case 'k': /* Const qualifier on some type (Sun) */
1859 type = read_type (pp, objfile);
1860 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1861 dbx_lookup_type (typenums, objfile));
1864 case 'B': /* Volatile qual on some type (Sun) */
1865 type = read_type (pp, objfile);
1866 type = make_cv_type (TYPE_CONST (type), 1, type,
1867 dbx_lookup_type (typenums, objfile));
1871 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1872 { /* Member (class & variable) type */
1873 /* FIXME -- we should be doing smash_to_XXX types here. */
1875 struct type *domain = read_type (pp, objfile);
1876 struct type *memtype;
1879 /* Invalid member type data format. */
1880 return error_type (pp, objfile);
1883 memtype = read_type (pp, objfile);
1884 type = dbx_alloc_type (typenums, objfile);
1885 smash_to_memberptr_type (type, domain, memtype);
1888 /* type attribute */
1892 /* Skip to the semicolon. */
1893 while (**pp != ';' && **pp != '\0')
1896 return error_type (pp, objfile);
1898 ++ * pp; /* Skip the semicolon. */
1902 case 's': /* Size attribute */
1903 type_size = atoi (attr + 1);
1908 case 'S': /* String attribute */
1909 /* FIXME: check to see if following type is array? */
1913 case 'V': /* Vector attribute */
1914 /* FIXME: check to see if following type is array? */
1919 /* Ignore unrecognized type attributes, so future compilers
1920 can invent new ones. */
1928 case '#': /* Method (class & fn) type */
1929 if ((*pp)[0] == '#')
1931 /* We'll get the parameter types from the name. */
1932 struct type *return_type;
1935 return_type = read_type (pp, objfile);
1936 if (*(*pp)++ != ';')
1937 complaint (&symfile_complaints,
1938 _("invalid (minimal) member type "
1939 "data format at symtab pos %d."),
1941 type = allocate_stub_method (return_type);
1942 if (typenums[0] != -1)
1943 *dbx_lookup_type (typenums, objfile) = type;
1947 struct type *domain = read_type (pp, objfile);
1948 struct type *return_type;
1953 /* Invalid member type data format. */
1954 return error_type (pp, objfile);
1958 return_type = read_type (pp, objfile);
1959 args = read_args (pp, ';', objfile, &nargs, &varargs);
1961 return error_type (pp, objfile);
1962 type = dbx_alloc_type (typenums, objfile);
1963 smash_to_method_type (type, domain, return_type, args,
1968 case 'r': /* Range type */
1969 type = read_range_type (pp, typenums, type_size, objfile);
1970 if (typenums[0] != -1)
1971 *dbx_lookup_type (typenums, objfile) = type;
1976 /* Sun ACC builtin int type */
1977 type = read_sun_builtin_type (pp, typenums, objfile);
1978 if (typenums[0] != -1)
1979 *dbx_lookup_type (typenums, objfile) = type;
1983 case 'R': /* Sun ACC builtin float type */
1984 type = read_sun_floating_type (pp, typenums, objfile);
1985 if (typenums[0] != -1)
1986 *dbx_lookup_type (typenums, objfile) = type;
1989 case 'e': /* Enumeration type */
1990 type = dbx_alloc_type (typenums, objfile);
1991 type = read_enum_type (pp, type, objfile);
1992 if (typenums[0] != -1)
1993 *dbx_lookup_type (typenums, objfile) = type;
1996 case 's': /* Struct type */
1997 case 'u': /* Union type */
1999 enum type_code type_code = TYPE_CODE_UNDEF;
2000 type = dbx_alloc_type (typenums, objfile);
2001 switch (type_descriptor)
2004 type_code = TYPE_CODE_STRUCT;
2007 type_code = TYPE_CODE_UNION;
2010 type = read_struct_type (pp, type, type_code, objfile);
2014 case 'a': /* Array type */
2016 return error_type (pp, objfile);
2019 type = dbx_alloc_type (typenums, objfile);
2020 type = read_array_type (pp, type, objfile);
2022 TYPE_CODE (type) = TYPE_CODE_STRING;
2024 make_vector_type (type);
2027 case 'S': /* Set type */
2028 type1 = read_type (pp, objfile);
2029 type = create_set_type ((struct type *) NULL, type1);
2030 if (typenums[0] != -1)
2031 *dbx_lookup_type (typenums, objfile) = type;
2035 --*pp; /* Go back to the symbol in error. */
2036 /* Particularly important if it was \0! */
2037 return error_type (pp, objfile);
2042 warning (_("GDB internal error, type is NULL in stabsread.c."));
2043 return error_type (pp, objfile);
2046 /* Size specified in a type attribute overrides any other size. */
2047 if (type_size != -1)
2048 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2053 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2054 Return the proper type node for a given builtin type number. */
2056 static const struct objfile_data *rs6000_builtin_type_data;
2058 static struct type *
2059 rs6000_builtin_type (int typenum, struct objfile *objfile)
2061 struct type **negative_types
2062 = (struct type **) objfile_data (objfile, rs6000_builtin_type_data);
2064 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2065 #define NUMBER_RECOGNIZED 34
2066 struct type *rettype = NULL;
2068 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2070 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
2071 return objfile_type (objfile)->builtin_error;
2074 if (!negative_types)
2076 /* This includes an empty slot for type number -0. */
2077 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2078 NUMBER_RECOGNIZED + 1, struct type *);
2079 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2082 if (negative_types[-typenum] != NULL)
2083 return negative_types[-typenum];
2085 #if TARGET_CHAR_BIT != 8
2086 #error This code wrong for TARGET_CHAR_BIT not 8
2087 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2088 that if that ever becomes not true, the correct fix will be to
2089 make the size in the struct type to be in bits, not in units of
2096 /* The size of this and all the other types are fixed, defined
2097 by the debugging format. If there is a type called "int" which
2098 is other than 32 bits, then it should use a new negative type
2099 number (or avoid negative type numbers for that case).
2100 See stabs.texinfo. */
2101 rettype = init_integer_type (objfile, 32, 0, "int");
2104 rettype = init_integer_type (objfile, 8, 0, "char");
2105 TYPE_NOSIGN (rettype) = 1;
2108 rettype = init_integer_type (objfile, 16, 0, "short");
2111 rettype = init_integer_type (objfile, 32, 0, "long");
2114 rettype = init_integer_type (objfile, 8, 1, "unsigned char");
2117 rettype = init_integer_type (objfile, 8, 0, "signed char");
2120 rettype = init_integer_type (objfile, 16, 1, "unsigned short");
2123 rettype = init_integer_type (objfile, 32, 1, "unsigned int");
2126 rettype = init_integer_type (objfile, 32, 1, "unsigned");
2129 rettype = init_integer_type (objfile, 32, 1, "unsigned long");
2132 rettype = init_type (objfile, TYPE_CODE_VOID, 1, "void");
2135 /* IEEE single precision (32 bit). */
2136 rettype = init_float_type (objfile, 32, "float",
2137 floatformats_ieee_single);
2140 /* IEEE double precision (64 bit). */
2141 rettype = init_float_type (objfile, 64, "double",
2142 floatformats_ieee_double);
2145 /* This is an IEEE double on the RS/6000, and different machines with
2146 different sizes for "long double" should use different negative
2147 type numbers. See stabs.texinfo. */
2148 rettype = init_float_type (objfile, 64, "long double",
2149 floatformats_ieee_double);
2152 rettype = init_integer_type (objfile, 32, 0, "integer");
2155 rettype = init_boolean_type (objfile, 32, 1, "boolean");
2158 rettype = init_float_type (objfile, 32, "short real",
2159 floatformats_ieee_single);
2162 rettype = init_float_type (objfile, 64, "real",
2163 floatformats_ieee_double);
2166 rettype = init_type (objfile, TYPE_CODE_ERROR, 0, "stringptr");
2169 rettype = init_character_type (objfile, 8, 1, "character");
2172 rettype = init_boolean_type (objfile, 8, 1, "logical*1");
2175 rettype = init_boolean_type (objfile, 16, 1, "logical*2");
2178 rettype = init_boolean_type (objfile, 32, 1, "logical*4");
2181 rettype = init_boolean_type (objfile, 32, 1, "logical");
2184 /* Complex type consisting of two IEEE single precision values. */
2185 rettype = init_complex_type (objfile, "complex",
2186 rs6000_builtin_type (12, objfile));
2189 /* Complex type consisting of two IEEE double precision values. */
2190 rettype = init_complex_type (objfile, "double complex",
2191 rs6000_builtin_type (13, objfile));
2194 rettype = init_integer_type (objfile, 8, 0, "integer*1");
2197 rettype = init_integer_type (objfile, 16, 0, "integer*2");
2200 rettype = init_integer_type (objfile, 32, 0, "integer*4");
2203 rettype = init_character_type (objfile, 16, 0, "wchar");
2206 rettype = init_integer_type (objfile, 64, 0, "long long");
2209 rettype = init_integer_type (objfile, 64, 1, "unsigned long long");
2212 rettype = init_integer_type (objfile, 64, 1, "logical*8");
2215 rettype = init_integer_type (objfile, 64, 0, "integer*8");
2218 negative_types[-typenum] = rettype;
2222 /* This page contains subroutines of read_type. */
2224 /* Wrapper around method_name_from_physname to flag a complaint
2225 if there is an error. */
2228 stabs_method_name_from_physname (const char *physname)
2232 method_name = method_name_from_physname (physname);
2234 if (method_name == NULL)
2236 complaint (&symfile_complaints,
2237 _("Method has bad physname %s\n"), physname);
2244 /* Read member function stabs info for C++ classes. The form of each member
2247 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2249 An example with two member functions is:
2251 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2253 For the case of overloaded operators, the format is op$::*.funcs, where
2254 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2255 name (such as `+=') and `.' marks the end of the operator name.
2257 Returns 1 for success, 0 for failure. */
2260 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2261 struct objfile *objfile)
2268 struct next_fnfield *next;
2269 struct fn_field fn_field;
2272 struct type *look_ahead_type;
2273 struct next_fnfieldlist *new_fnlist;
2274 struct next_fnfield *new_sublist;
2278 /* Process each list until we find something that is not a member function
2279 or find the end of the functions. */
2283 /* We should be positioned at the start of the function name.
2284 Scan forward to find the first ':' and if it is not the
2285 first of a "::" delimiter, then this is not a member function. */
2297 look_ahead_type = NULL;
2300 new_fnlist = XCNEW (struct next_fnfieldlist);
2301 make_cleanup (xfree, new_fnlist);
2303 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2305 /* This is a completely wierd case. In order to stuff in the
2306 names that might contain colons (the usual name delimiter),
2307 Mike Tiemann defined a different name format which is
2308 signalled if the identifier is "op$". In that case, the
2309 format is "op$::XXXX." where XXXX is the name. This is
2310 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2311 /* This lets the user type "break operator+".
2312 We could just put in "+" as the name, but that wouldn't
2314 static char opname[32] = "op$";
2315 char *o = opname + 3;
2317 /* Skip past '::'. */
2320 STABS_CONTINUE (pp, objfile);
2326 main_fn_name = savestring (opname, o - opname);
2332 main_fn_name = savestring (*pp, p - *pp);
2333 /* Skip past '::'. */
2336 new_fnlist->fn_fieldlist.name = main_fn_name;
2340 new_sublist = XCNEW (struct next_fnfield);
2341 make_cleanup (xfree, new_sublist);
2343 /* Check for and handle cretinous dbx symbol name continuation! */
2344 if (look_ahead_type == NULL)
2347 STABS_CONTINUE (pp, objfile);
2349 new_sublist->fn_field.type = read_type (pp, objfile);
2352 /* Invalid symtab info for member function. */
2358 /* g++ version 1 kludge */
2359 new_sublist->fn_field.type = look_ahead_type;
2360 look_ahead_type = NULL;
2370 /* These are methods, not functions. */
2371 if (TYPE_CODE (new_sublist->fn_field.type) == TYPE_CODE_FUNC)
2372 TYPE_CODE (new_sublist->fn_field.type) = TYPE_CODE_METHOD;
2374 gdb_assert (TYPE_CODE (new_sublist->fn_field.type)
2375 == TYPE_CODE_METHOD);
2377 /* If this is just a stub, then we don't have the real name here. */
2378 if (TYPE_STUB (new_sublist->fn_field.type))
2380 if (!TYPE_SELF_TYPE (new_sublist->fn_field.type))
2381 set_type_self_type (new_sublist->fn_field.type, type);
2382 new_sublist->fn_field.is_stub = 1;
2385 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2388 /* Set this member function's visibility fields. */
2391 case VISIBILITY_PRIVATE:
2392 new_sublist->fn_field.is_private = 1;
2394 case VISIBILITY_PROTECTED:
2395 new_sublist->fn_field.is_protected = 1;
2399 STABS_CONTINUE (pp, objfile);
2402 case 'A': /* Normal functions. */
2403 new_sublist->fn_field.is_const = 0;
2404 new_sublist->fn_field.is_volatile = 0;
2407 case 'B': /* `const' member functions. */
2408 new_sublist->fn_field.is_const = 1;
2409 new_sublist->fn_field.is_volatile = 0;
2412 case 'C': /* `volatile' member function. */
2413 new_sublist->fn_field.is_const = 0;
2414 new_sublist->fn_field.is_volatile = 1;
2417 case 'D': /* `const volatile' member function. */
2418 new_sublist->fn_field.is_const = 1;
2419 new_sublist->fn_field.is_volatile = 1;
2422 case '*': /* File compiled with g++ version 1 --
2428 complaint (&symfile_complaints,
2429 _("const/volatile indicator missing, got '%c'"),
2439 /* virtual member function, followed by index.
2440 The sign bit is set to distinguish pointers-to-methods
2441 from virtual function indicies. Since the array is
2442 in words, the quantity must be shifted left by 1
2443 on 16 bit machine, and by 2 on 32 bit machine, forcing
2444 the sign bit out, and usable as a valid index into
2445 the array. Remove the sign bit here. */
2446 new_sublist->fn_field.voffset =
2447 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2451 STABS_CONTINUE (pp, objfile);
2452 if (**pp == ';' || **pp == '\0')
2454 /* Must be g++ version 1. */
2455 new_sublist->fn_field.fcontext = 0;
2459 /* Figure out from whence this virtual function came.
2460 It may belong to virtual function table of
2461 one of its baseclasses. */
2462 look_ahead_type = read_type (pp, objfile);
2465 /* g++ version 1 overloaded methods. */
2469 new_sublist->fn_field.fcontext = look_ahead_type;
2478 look_ahead_type = NULL;
2484 /* static member function. */
2486 int slen = strlen (main_fn_name);
2488 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2490 /* For static member functions, we can't tell if they
2491 are stubbed, as they are put out as functions, and not as
2493 GCC v2 emits the fully mangled name if
2494 dbxout.c:flag_minimal_debug is not set, so we have to
2495 detect a fully mangled physname here and set is_stub
2496 accordingly. Fully mangled physnames in v2 start with
2497 the member function name, followed by two underscores.
2498 GCC v3 currently always emits stubbed member functions,
2499 but with fully mangled physnames, which start with _Z. */
2500 if (!(strncmp (new_sublist->fn_field.physname,
2501 main_fn_name, slen) == 0
2502 && new_sublist->fn_field.physname[slen] == '_'
2503 && new_sublist->fn_field.physname[slen + 1] == '_'))
2505 new_sublist->fn_field.is_stub = 1;
2512 complaint (&symfile_complaints,
2513 _("member function type missing, got '%c'"),
2515 /* Fall through into normal member function. */
2518 /* normal member function. */
2519 new_sublist->fn_field.voffset = 0;
2520 new_sublist->fn_field.fcontext = 0;
2524 new_sublist->next = sublist;
2525 sublist = new_sublist;
2527 STABS_CONTINUE (pp, objfile);
2529 while (**pp != ';' && **pp != '\0');
2532 STABS_CONTINUE (pp, objfile);
2534 /* Skip GCC 3.X member functions which are duplicates of the callable
2535 constructor/destructor. */
2536 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2537 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2538 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2540 xfree (main_fn_name);
2545 int has_destructor = 0, has_other = 0;
2547 struct next_fnfield *tmp_sublist;
2549 /* Various versions of GCC emit various mostly-useless
2550 strings in the name field for special member functions.
2552 For stub methods, we need to defer correcting the name
2553 until we are ready to unstub the method, because the current
2554 name string is used by gdb_mangle_name. The only stub methods
2555 of concern here are GNU v2 operators; other methods have their
2556 names correct (see caveat below).
2558 For non-stub methods, in GNU v3, we have a complete physname.
2559 Therefore we can safely correct the name now. This primarily
2560 affects constructors and destructors, whose name will be
2561 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2562 operators will also have incorrect names; for instance,
2563 "operator int" will be named "operator i" (i.e. the type is
2566 For non-stub methods in GNU v2, we have no easy way to
2567 know if we have a complete physname or not. For most
2568 methods the result depends on the platform (if CPLUS_MARKER
2569 can be `$' or `.', it will use minimal debug information, or
2570 otherwise the full physname will be included).
2572 Rather than dealing with this, we take a different approach.
2573 For v3 mangled names, we can use the full physname; for v2,
2574 we use cplus_demangle_opname (which is actually v2 specific),
2575 because the only interesting names are all operators - once again
2576 barring the caveat below. Skip this process if any method in the
2577 group is a stub, to prevent our fouling up the workings of
2580 The caveat: GCC 2.95.x (and earlier?) put constructors and
2581 destructors in the same method group. We need to split this
2582 into two groups, because they should have different names.
2583 So for each method group we check whether it contains both
2584 routines whose physname appears to be a destructor (the physnames
2585 for and destructors are always provided, due to quirks in v2
2586 mangling) and routines whose physname does not appear to be a
2587 destructor. If so then we break up the list into two halves.
2588 Even if the constructors and destructors aren't in the same group
2589 the destructor will still lack the leading tilde, so that also
2592 So, to summarize what we expect and handle here:
2594 Given Given Real Real Action
2595 method name physname physname method name
2597 __opi [none] __opi__3Foo operator int opname
2599 Foo _._3Foo _._3Foo ~Foo separate and
2601 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2602 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2605 tmp_sublist = sublist;
2606 while (tmp_sublist != NULL)
2608 if (tmp_sublist->fn_field.is_stub)
2610 if (tmp_sublist->fn_field.physname[0] == '_'
2611 && tmp_sublist->fn_field.physname[1] == 'Z')
2614 if (is_destructor_name (tmp_sublist->fn_field.physname))
2619 tmp_sublist = tmp_sublist->next;
2622 if (has_destructor && has_other)
2624 struct next_fnfieldlist *destr_fnlist;
2625 struct next_fnfield *last_sublist;
2627 /* Create a new fn_fieldlist for the destructors. */
2629 destr_fnlist = XCNEW (struct next_fnfieldlist);
2630 make_cleanup (xfree, destr_fnlist);
2632 destr_fnlist->fn_fieldlist.name
2633 = obconcat (&objfile->objfile_obstack, "~",
2634 new_fnlist->fn_fieldlist.name, (char *) NULL);
2636 destr_fnlist->fn_fieldlist.fn_fields =
2637 XOBNEWVEC (&objfile->objfile_obstack,
2638 struct fn_field, has_destructor);
2639 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2640 sizeof (struct fn_field) * has_destructor);
2641 tmp_sublist = sublist;
2642 last_sublist = NULL;
2644 while (tmp_sublist != NULL)
2646 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2648 tmp_sublist = tmp_sublist->next;
2652 destr_fnlist->fn_fieldlist.fn_fields[i++]
2653 = tmp_sublist->fn_field;
2655 last_sublist->next = tmp_sublist->next;
2657 sublist = tmp_sublist->next;
2658 last_sublist = tmp_sublist;
2659 tmp_sublist = tmp_sublist->next;
2662 destr_fnlist->fn_fieldlist.length = has_destructor;
2663 destr_fnlist->next = fip->fnlist;
2664 fip->fnlist = destr_fnlist;
2666 length -= has_destructor;
2670 /* v3 mangling prevents the use of abbreviated physnames,
2671 so we can do this here. There are stubbed methods in v3
2673 - in -gstabs instead of -gstabs+
2674 - or for static methods, which are output as a function type
2675 instead of a method type. */
2676 char *new_method_name =
2677 stabs_method_name_from_physname (sublist->fn_field.physname);
2679 if (new_method_name != NULL
2680 && strcmp (new_method_name,
2681 new_fnlist->fn_fieldlist.name) != 0)
2683 new_fnlist->fn_fieldlist.name = new_method_name;
2684 xfree (main_fn_name);
2687 xfree (new_method_name);
2689 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2691 new_fnlist->fn_fieldlist.name =
2692 obconcat (&objfile->objfile_obstack,
2693 "~", main_fn_name, (char *)NULL);
2694 xfree (main_fn_name);
2698 char dem_opname[256];
2701 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2702 dem_opname, DMGL_ANSI);
2704 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2707 new_fnlist->fn_fieldlist.name
2709 obstack_copy0 (&objfile->objfile_obstack, dem_opname,
2710 strlen (dem_opname)));
2711 xfree (main_fn_name);
2714 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2715 obstack_alloc (&objfile->objfile_obstack,
2716 sizeof (struct fn_field) * length);
2717 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2718 sizeof (struct fn_field) * length);
2719 for (i = length; (i--, sublist); sublist = sublist->next)
2721 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2724 new_fnlist->fn_fieldlist.length = length;
2725 new_fnlist->next = fip->fnlist;
2726 fip->fnlist = new_fnlist;
2733 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2734 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2735 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2736 memset (TYPE_FN_FIELDLISTS (type), 0,
2737 sizeof (struct fn_fieldlist) * nfn_fields);
2738 TYPE_NFN_FIELDS (type) = nfn_fields;
2744 /* Special GNU C++ name.
2746 Returns 1 for success, 0 for failure. "failure" means that we can't
2747 keep parsing and it's time for error_type(). */
2750 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2751 struct objfile *objfile)
2756 struct type *context;
2766 /* At this point, *pp points to something like "22:23=*22...",
2767 where the type number before the ':' is the "context" and
2768 everything after is a regular type definition. Lookup the
2769 type, find it's name, and construct the field name. */
2771 context = read_type (pp, objfile);
2775 case 'f': /* $vf -- a virtual function table pointer */
2776 name = type_name_no_tag (context);
2781 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2782 vptr_name, name, (char *) NULL);
2785 case 'b': /* $vb -- a virtual bsomethingorother */
2786 name = type_name_no_tag (context);
2789 complaint (&symfile_complaints,
2790 _("C++ abbreviated type name "
2791 "unknown at symtab pos %d"),
2795 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2796 name, (char *) NULL);
2800 invalid_cpp_abbrev_complaint (*pp);
2801 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2802 "INVALID_CPLUSPLUS_ABBREV",
2807 /* At this point, *pp points to the ':'. Skip it and read the
2813 invalid_cpp_abbrev_complaint (*pp);
2816 fip->list->field.type = read_type (pp, objfile);
2818 (*pp)++; /* Skip the comma. */
2825 SET_FIELD_BITPOS (fip->list->field,
2826 read_huge_number (pp, ';', &nbits, 0));
2830 /* This field is unpacked. */
2831 FIELD_BITSIZE (fip->list->field) = 0;
2832 fip->list->visibility = VISIBILITY_PRIVATE;
2836 invalid_cpp_abbrev_complaint (*pp);
2837 /* We have no idea what syntax an unrecognized abbrev would have, so
2838 better return 0. If we returned 1, we would need to at least advance
2839 *pp to avoid an infinite loop. */
2846 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2847 struct type *type, struct objfile *objfile)
2849 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2851 fip->list->field.name
2852 = (const char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
2855 /* This means we have a visibility for a field coming. */
2859 fip->list->visibility = *(*pp)++;
2863 /* normal dbx-style format, no explicit visibility */
2864 fip->list->visibility = VISIBILITY_PUBLIC;
2867 fip->list->field.type = read_type (pp, objfile);
2872 /* Possible future hook for nested types. */
2875 fip->list->field.bitpos = (long) -2; /* nested type */
2885 /* Static class member. */
2886 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2890 else if (**pp != ',')
2892 /* Bad structure-type format. */
2893 stabs_general_complaint ("bad structure-type format");
2897 (*pp)++; /* Skip the comma. */
2902 SET_FIELD_BITPOS (fip->list->field,
2903 read_huge_number (pp, ',', &nbits, 0));
2906 stabs_general_complaint ("bad structure-type format");
2909 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2912 stabs_general_complaint ("bad structure-type format");
2917 if (FIELD_BITPOS (fip->list->field) == 0
2918 && FIELD_BITSIZE (fip->list->field) == 0)
2920 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2921 it is a field which has been optimized out. The correct stab for
2922 this case is to use VISIBILITY_IGNORE, but that is a recent
2923 invention. (2) It is a 0-size array. For example
2924 union { int num; char str[0]; } foo. Printing _("<no value>" for
2925 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2926 will continue to work, and a 0-size array as a whole doesn't
2927 have any contents to print.
2929 I suspect this probably could also happen with gcc -gstabs (not
2930 -gstabs+) for static fields, and perhaps other C++ extensions.
2931 Hopefully few people use -gstabs with gdb, since it is intended
2932 for dbx compatibility. */
2934 /* Ignore this field. */
2935 fip->list->visibility = VISIBILITY_IGNORE;
2939 /* Detect an unpacked field and mark it as such.
2940 dbx gives a bit size for all fields.
2941 Note that forward refs cannot be packed,
2942 and treat enums as if they had the width of ints. */
2944 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2946 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2947 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2948 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2949 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2951 FIELD_BITSIZE (fip->list->field) = 0;
2953 if ((FIELD_BITSIZE (fip->list->field)
2954 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2955 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2956 && FIELD_BITSIZE (fip->list->field)
2957 == gdbarch_int_bit (gdbarch))
2960 FIELD_BITPOS (fip->list->field) % 8 == 0)
2962 FIELD_BITSIZE (fip->list->field) = 0;
2968 /* Read struct or class data fields. They have the form:
2970 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2972 At the end, we see a semicolon instead of a field.
2974 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2977 The optional VISIBILITY is one of:
2979 '/0' (VISIBILITY_PRIVATE)
2980 '/1' (VISIBILITY_PROTECTED)
2981 '/2' (VISIBILITY_PUBLIC)
2982 '/9' (VISIBILITY_IGNORE)
2984 or nothing, for C style fields with public visibility.
2986 Returns 1 for success, 0 for failure. */
2989 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
2990 struct objfile *objfile)
2993 struct nextfield *newobj;
2995 /* We better set p right now, in case there are no fields at all... */
2999 /* Read each data member type until we find the terminating ';' at the end of
3000 the data member list, or break for some other reason such as finding the
3001 start of the member function list. */
3002 /* Stab string for structure/union does not end with two ';' in
3003 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3005 while (**pp != ';' && **pp != '\0')
3007 STABS_CONTINUE (pp, objfile);
3008 /* Get space to record the next field's data. */
3009 newobj = XCNEW (struct nextfield);
3010 make_cleanup (xfree, newobj);
3012 newobj->next = fip->list;
3015 /* Get the field name. */
3018 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3019 unless the CPLUS_MARKER is followed by an underscore, in
3020 which case it is just the name of an anonymous type, which we
3021 should handle like any other type name. */
3023 if (is_cplus_marker (p[0]) && p[1] != '_')
3025 if (!read_cpp_abbrev (fip, pp, type, objfile))
3030 /* Look for the ':' that separates the field name from the field
3031 values. Data members are delimited by a single ':', while member
3032 functions are delimited by a pair of ':'s. When we hit the member
3033 functions (if any), terminate scan loop and return. */
3035 while (*p != ':' && *p != '\0')
3042 /* Check to see if we have hit the member functions yet. */
3047 read_one_struct_field (fip, pp, p, type, objfile);
3049 if (p[0] == ':' && p[1] == ':')
3051 /* (the deleted) chill the list of fields: the last entry (at
3052 the head) is a partially constructed entry which we now
3054 fip->list = fip->list->next;
3059 /* The stabs for C++ derived classes contain baseclass information which
3060 is marked by a '!' character after the total size. This function is
3061 called when we encounter the baseclass marker, and slurps up all the
3062 baseclass information.
3064 Immediately following the '!' marker is the number of base classes that
3065 the class is derived from, followed by information for each base class.
3066 For each base class, there are two visibility specifiers, a bit offset
3067 to the base class information within the derived class, a reference to
3068 the type for the base class, and a terminating semicolon.
3070 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3072 Baseclass information marker __________________|| | | | | | |
3073 Number of baseclasses __________________________| | | | | | |
3074 Visibility specifiers (2) ________________________| | | | | |
3075 Offset in bits from start of class _________________| | | | |
3076 Type number for base class ___________________________| | | |
3077 Visibility specifiers (2) _______________________________| | |
3078 Offset in bits from start of class ________________________| |
3079 Type number of base class ____________________________________|
3081 Return 1 for success, 0 for (error-type-inducing) failure. */
3087 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3088 struct objfile *objfile)
3091 struct nextfield *newobj;
3099 /* Skip the '!' baseclass information marker. */
3103 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3107 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3113 /* Some stupid compilers have trouble with the following, so break
3114 it up into simpler expressions. */
3115 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3116 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3119 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3122 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3123 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3127 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3129 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3131 newobj = XCNEW (struct nextfield);
3132 make_cleanup (xfree, newobj);
3134 newobj->next = fip->list;
3136 FIELD_BITSIZE (newobj->field) = 0; /* This should be an unpacked
3139 STABS_CONTINUE (pp, objfile);
3143 /* Nothing to do. */
3146 SET_TYPE_FIELD_VIRTUAL (type, i);
3149 /* Unknown character. Complain and treat it as non-virtual. */
3151 complaint (&symfile_complaints,
3152 _("Unknown virtual character `%c' for baseclass"),
3158 newobj->visibility = *(*pp)++;
3159 switch (newobj->visibility)
3161 case VISIBILITY_PRIVATE:
3162 case VISIBILITY_PROTECTED:
3163 case VISIBILITY_PUBLIC:
3166 /* Bad visibility format. Complain and treat it as
3169 complaint (&symfile_complaints,
3170 _("Unknown visibility `%c' for baseclass"),
3171 newobj->visibility);
3172 newobj->visibility = VISIBILITY_PUBLIC;
3179 /* The remaining value is the bit offset of the portion of the object
3180 corresponding to this baseclass. Always zero in the absence of
3181 multiple inheritance. */
3183 SET_FIELD_BITPOS (newobj->field, read_huge_number (pp, ',', &nbits, 0));
3188 /* The last piece of baseclass information is the type of the
3189 base class. Read it, and remember it's type name as this
3192 newobj->field.type = read_type (pp, objfile);
3193 newobj->field.name = type_name_no_tag (newobj->field.type);
3195 /* Skip trailing ';' and bump count of number of fields seen. */
3204 /* The tail end of stabs for C++ classes that contain a virtual function
3205 pointer contains a tilde, a %, and a type number.
3206 The type number refers to the base class (possibly this class itself) which
3207 contains the vtable pointer for the current class.
3209 This function is called when we have parsed all the method declarations,
3210 so we can look for the vptr base class info. */
3213 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3214 struct objfile *objfile)
3218 STABS_CONTINUE (pp, objfile);
3220 /* If we are positioned at a ';', then skip it. */
3230 if (**pp == '=' || **pp == '+' || **pp == '-')
3232 /* Obsolete flags that used to indicate the presence
3233 of constructors and/or destructors. */
3237 /* Read either a '%' or the final ';'. */
3238 if (*(*pp)++ == '%')
3240 /* The next number is the type number of the base class
3241 (possibly our own class) which supplies the vtable for
3242 this class. Parse it out, and search that class to find
3243 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3244 and TYPE_VPTR_FIELDNO. */
3249 t = read_type (pp, objfile);
3251 while (*p != '\0' && *p != ';')
3257 /* Premature end of symbol. */
3261 set_type_vptr_basetype (type, t);
3262 if (type == t) /* Our own class provides vtbl ptr. */
3264 for (i = TYPE_NFIELDS (t) - 1;
3265 i >= TYPE_N_BASECLASSES (t);
3268 const char *name = TYPE_FIELD_NAME (t, i);
3270 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3271 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3273 set_type_vptr_fieldno (type, i);
3277 /* Virtual function table field not found. */
3278 complaint (&symfile_complaints,
3279 _("virtual function table pointer "
3280 "not found when defining class `%s'"),
3286 set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t));
3297 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3301 for (n = TYPE_NFN_FIELDS (type);
3302 fip->fnlist != NULL;
3303 fip->fnlist = fip->fnlist->next)
3305 --n; /* Circumvent Sun3 compiler bug. */
3306 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3311 /* Create the vector of fields, and record how big it is.
3312 We need this info to record proper virtual function table information
3313 for this class's virtual functions. */
3316 attach_fields_to_type (struct field_info *fip, struct type *type,
3317 struct objfile *objfile)
3320 int non_public_fields = 0;
3321 struct nextfield *scan;
3323 /* Count up the number of fields that we have, as well as taking note of
3324 whether or not there are any non-public fields, which requires us to
3325 allocate and build the private_field_bits and protected_field_bits
3328 for (scan = fip->list; scan != NULL; scan = scan->next)
3331 if (scan->visibility != VISIBILITY_PUBLIC)
3333 non_public_fields++;
3337 /* Now we know how many fields there are, and whether or not there are any
3338 non-public fields. Record the field count, allocate space for the
3339 array of fields, and create blank visibility bitfields if necessary. */
3341 TYPE_NFIELDS (type) = nfields;
3342 TYPE_FIELDS (type) = (struct field *)
3343 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3344 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3346 if (non_public_fields)
3348 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3350 TYPE_FIELD_PRIVATE_BITS (type) =
3351 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3352 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3354 TYPE_FIELD_PROTECTED_BITS (type) =
3355 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3356 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3358 TYPE_FIELD_IGNORE_BITS (type) =
3359 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3360 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3363 /* Copy the saved-up fields into the field vector. Start from the
3364 head of the list, adding to the tail of the field array, so that
3365 they end up in the same order in the array in which they were
3366 added to the list. */
3368 while (nfields-- > 0)
3370 TYPE_FIELD (type, nfields) = fip->list->field;
3371 switch (fip->list->visibility)
3373 case VISIBILITY_PRIVATE:
3374 SET_TYPE_FIELD_PRIVATE (type, nfields);
3377 case VISIBILITY_PROTECTED:
3378 SET_TYPE_FIELD_PROTECTED (type, nfields);
3381 case VISIBILITY_IGNORE:
3382 SET_TYPE_FIELD_IGNORE (type, nfields);
3385 case VISIBILITY_PUBLIC:
3389 /* Unknown visibility. Complain and treat it as public. */
3391 complaint (&symfile_complaints,
3392 _("Unknown visibility `%c' for field"),
3393 fip->list->visibility);
3397 fip->list = fip->list->next;
3403 /* Complain that the compiler has emitted more than one definition for the
3404 structure type TYPE. */
3406 complain_about_struct_wipeout (struct type *type)
3408 const char *name = "";
3409 const char *kind = "";
3411 if (TYPE_TAG_NAME (type))
3413 name = TYPE_TAG_NAME (type);
3414 switch (TYPE_CODE (type))
3416 case TYPE_CODE_STRUCT: kind = "struct "; break;
3417 case TYPE_CODE_UNION: kind = "union "; break;
3418 case TYPE_CODE_ENUM: kind = "enum "; break;
3422 else if (TYPE_NAME (type))
3424 name = TYPE_NAME (type);
3433 complaint (&symfile_complaints,
3434 _("struct/union type gets multiply defined: %s%s"), kind, name);
3437 /* Set the length for all variants of a same main_type, which are
3438 connected in the closed chain.
3440 This is something that needs to be done when a type is defined *after*
3441 some cross references to this type have already been read. Consider
3442 for instance the following scenario where we have the following two
3445 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3446 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3448 A stubbed version of type dummy is created while processing the first
3449 stabs entry. The length of that type is initially set to zero, since
3450 it is unknown at this point. Also, a "constant" variation of type
3451 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3454 The second stabs entry allows us to replace the stubbed definition
3455 with the real definition. However, we still need to adjust the length
3456 of the "constant" variation of that type, as its length was left
3457 untouched during the main type replacement... */
3460 set_length_in_type_chain (struct type *type)
3462 struct type *ntype = TYPE_CHAIN (type);
3464 while (ntype != type)
3466 if (TYPE_LENGTH(ntype) == 0)
3467 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3469 complain_about_struct_wipeout (ntype);
3470 ntype = TYPE_CHAIN (ntype);
3474 /* Read the description of a structure (or union type) and return an object
3475 describing the type.
3477 PP points to a character pointer that points to the next unconsumed token
3478 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3479 *PP will point to "4a:1,0,32;;".
3481 TYPE points to an incomplete type that needs to be filled in.
3483 OBJFILE points to the current objfile from which the stabs information is
3484 being read. (Note that it is redundant in that TYPE also contains a pointer
3485 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3488 static struct type *
3489 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3490 struct objfile *objfile)
3492 struct cleanup *back_to;
3493 struct field_info fi;
3498 /* When describing struct/union/class types in stabs, G++ always drops
3499 all qualifications from the name. So if you've got:
3500 struct A { ... struct B { ... }; ... };
3501 then G++ will emit stabs for `struct A::B' that call it simply
3502 `struct B'. Obviously, if you've got a real top-level definition for
3503 `struct B', or other nested definitions, this is going to cause
3506 Obviously, GDB can't fix this by itself, but it can at least avoid
3507 scribbling on existing structure type objects when new definitions
3509 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3510 || TYPE_STUB (type)))
3512 complain_about_struct_wipeout (type);
3514 /* It's probably best to return the type unchanged. */
3518 back_to = make_cleanup (null_cleanup, 0);
3520 INIT_CPLUS_SPECIFIC (type);
3521 TYPE_CODE (type) = type_code;
3522 TYPE_STUB (type) = 0;
3524 /* First comes the total size in bytes. */
3529 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3532 do_cleanups (back_to);
3533 return error_type (pp, objfile);
3535 set_length_in_type_chain (type);
3538 /* Now read the baseclasses, if any, read the regular C struct or C++
3539 class member fields, attach the fields to the type, read the C++
3540 member functions, attach them to the type, and then read any tilde
3541 field (baseclass specifier for the class holding the main vtable). */
3543 if (!read_baseclasses (&fi, pp, type, objfile)
3544 || !read_struct_fields (&fi, pp, type, objfile)
3545 || !attach_fields_to_type (&fi, type, objfile)
3546 || !read_member_functions (&fi, pp, type, objfile)
3547 || !attach_fn_fields_to_type (&fi, type)
3548 || !read_tilde_fields (&fi, pp, type, objfile))
3550 type = error_type (pp, objfile);
3553 do_cleanups (back_to);
3557 /* Read a definition of an array type,
3558 and create and return a suitable type object.
3559 Also creates a range type which represents the bounds of that
3562 static struct type *
3563 read_array_type (char **pp, struct type *type,
3564 struct objfile *objfile)
3566 struct type *index_type, *element_type, *range_type;
3571 /* Format of an array type:
3572 "ar<index type>;lower;upper;<array_contents_type>".
3573 OS9000: "arlower,upper;<array_contents_type>".
3575 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3576 for these, produce a type like float[][]. */
3579 index_type = read_type (pp, objfile);
3581 /* Improper format of array type decl. */
3582 return error_type (pp, objfile);
3586 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3591 lower = read_huge_number (pp, ';', &nbits, 0);
3594 return error_type (pp, objfile);
3596 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3601 upper = read_huge_number (pp, ';', &nbits, 0);
3603 return error_type (pp, objfile);
3605 element_type = read_type (pp, objfile);
3614 create_static_range_type ((struct type *) NULL, index_type, lower, upper);
3615 type = create_array_type (type, element_type, range_type);
3621 /* Read a definition of an enumeration type,
3622 and create and return a suitable type object.
3623 Also defines the symbols that represent the values of the type. */
3625 static struct type *
3626 read_enum_type (char **pp, struct type *type,
3627 struct objfile *objfile)
3629 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3635 struct pending **symlist;
3636 struct pending *osyms, *syms;
3639 int unsigned_enum = 1;
3642 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3643 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3644 to do? For now, force all enum values to file scope. */
3645 if (within_function)
3646 symlist = &local_symbols;
3649 symlist = &file_symbols;
3651 o_nsyms = osyms ? osyms->nsyms : 0;
3653 /* The aix4 compiler emits an extra field before the enum members;
3654 my guess is it's a type of some sort. Just ignore it. */
3657 /* Skip over the type. */
3661 /* Skip over the colon. */
3665 /* Read the value-names and their values.
3666 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3667 A semicolon or comma instead of a NAME means the end. */
3668 while (**pp && **pp != ';' && **pp != ',')
3670 STABS_CONTINUE (pp, objfile);
3674 name = (char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
3676 n = read_huge_number (pp, ',', &nbits, 0);
3678 return error_type (pp, objfile);
3680 sym = allocate_symbol (objfile);
3681 SYMBOL_SET_LINKAGE_NAME (sym, name);
3682 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
3683 &objfile->objfile_obstack);
3684 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
3685 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3686 SYMBOL_VALUE (sym) = n;
3689 add_symbol_to_list (sym, symlist);
3694 (*pp)++; /* Skip the semicolon. */
3696 /* Now fill in the fields of the type-structure. */
3698 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3699 set_length_in_type_chain (type);
3700 TYPE_CODE (type) = TYPE_CODE_ENUM;
3701 TYPE_STUB (type) = 0;
3703 TYPE_UNSIGNED (type) = 1;
3704 TYPE_NFIELDS (type) = nsyms;
3705 TYPE_FIELDS (type) = (struct field *)
3706 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3707 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3709 /* Find the symbols for the values and put them into the type.
3710 The symbols can be found in the symlist that we put them on
3711 to cause them to be defined. osyms contains the old value
3712 of that symlist; everything up to there was defined by us. */
3713 /* Note that we preserve the order of the enum constants, so
3714 that in something like "enum {FOO, LAST_THING=FOO}" we print
3715 FOO, not LAST_THING. */
3717 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3719 int last = syms == osyms ? o_nsyms : 0;
3720 int j = syms->nsyms;
3722 for (; --j >= last; --n)
3724 struct symbol *xsym = syms->symbol[j];
3726 SYMBOL_TYPE (xsym) = type;
3727 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3728 SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
3729 TYPE_FIELD_BITSIZE (type, n) = 0;
3738 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3739 typedefs in every file (for int, long, etc):
3741 type = b <signed> <width> <format type>; <offset>; <nbits>
3743 optional format type = c or b for char or boolean.
3744 offset = offset from high order bit to start bit of type.
3745 width is # bytes in object of this type, nbits is # bits in type.
3747 The width/offset stuff appears to be for small objects stored in
3748 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3751 static struct type *
3752 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3757 int boolean_type = 0;
3768 return error_type (pp, objfile);
3772 /* For some odd reason, all forms of char put a c here. This is strange
3773 because no other type has this honor. We can safely ignore this because
3774 we actually determine 'char'acterness by the number of bits specified in
3776 Boolean forms, e.g Fortran logical*X, put a b here. */
3780 else if (**pp == 'b')
3786 /* The first number appears to be the number of bytes occupied
3787 by this type, except that unsigned short is 4 instead of 2.
3788 Since this information is redundant with the third number,
3789 we will ignore it. */
3790 read_huge_number (pp, ';', &nbits, 0);
3792 return error_type (pp, objfile);
3794 /* The second number is always 0, so ignore it too. */
3795 read_huge_number (pp, ';', &nbits, 0);
3797 return error_type (pp, objfile);
3799 /* The third number is the number of bits for this type. */
3800 type_bits = read_huge_number (pp, 0, &nbits, 0);
3802 return error_type (pp, objfile);
3803 /* The type *should* end with a semicolon. If it are embedded
3804 in a larger type the semicolon may be the only way to know where
3805 the type ends. If this type is at the end of the stabstring we
3806 can deal with the omitted semicolon (but we don't have to like
3807 it). Don't bother to complain(), Sun's compiler omits the semicolon
3814 struct type *type = init_type (objfile, TYPE_CODE_VOID, 1, NULL);
3816 TYPE_UNSIGNED (type) = 1;
3821 return init_boolean_type (objfile, type_bits, unsigned_type, NULL);
3823 return init_integer_type (objfile, type_bits, unsigned_type, NULL);
3826 static struct type *
3827 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3832 struct type *rettype;
3834 /* The first number has more details about the type, for example
3836 details = read_huge_number (pp, ';', &nbits, 0);
3838 return error_type (pp, objfile);
3840 /* The second number is the number of bytes occupied by this type. */
3841 nbytes = read_huge_number (pp, ';', &nbits, 0);
3843 return error_type (pp, objfile);
3845 nbits = nbytes * TARGET_CHAR_BIT;
3847 if (details == NF_COMPLEX || details == NF_COMPLEX16
3848 || details == NF_COMPLEX32)
3850 rettype = init_float_type (objfile, nbits / 2, NULL, NULL);
3851 return init_complex_type (objfile, NULL, rettype);
3854 return init_float_type (objfile, nbits, NULL, NULL);
3857 /* Read a number from the string pointed to by *PP.
3858 The value of *PP is advanced over the number.
3859 If END is nonzero, the character that ends the
3860 number must match END, or an error happens;
3861 and that character is skipped if it does match.
3862 If END is zero, *PP is left pointing to that character.
3864 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3865 the number is represented in an octal representation, assume that
3866 it is represented in a 2's complement representation with a size of
3867 TWOS_COMPLEMENT_BITS.
3869 If the number fits in a long, set *BITS to 0 and return the value.
3870 If not, set *BITS to be the number of bits in the number and return 0.
3872 If encounter garbage, set *BITS to -1 and return 0. */
3875 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3886 int twos_complement_representation = 0;
3894 /* Leading zero means octal. GCC uses this to output values larger
3895 than an int (because that would be hard in decimal). */
3902 /* Skip extra zeros. */
3906 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3908 /* Octal, possibly signed. Check if we have enough chars for a
3914 while ((c = *p1) >= '0' && c < '8')
3918 if (len > twos_complement_bits / 3
3919 || (twos_complement_bits % 3 == 0
3920 && len == twos_complement_bits / 3))
3922 /* Ok, we have enough characters for a signed value, check
3923 for signness by testing if the sign bit is set. */
3924 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3926 if (c & (1 << sign_bit))
3928 /* Definitely signed. */
3929 twos_complement_representation = 1;
3935 upper_limit = LONG_MAX / radix;
3937 while ((c = *p++) >= '0' && c < ('0' + radix))
3939 if (n <= upper_limit)
3941 if (twos_complement_representation)
3943 /* Octal, signed, twos complement representation. In
3944 this case, n is the corresponding absolute value. */
3947 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3959 /* unsigned representation */
3961 n += c - '0'; /* FIXME this overflows anyway. */
3967 /* This depends on large values being output in octal, which is
3974 /* Ignore leading zeroes. */
3978 else if (c == '2' || c == '3')
3999 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
4001 /* We were supposed to parse a number with maximum
4002 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4013 /* Large decimal constants are an error (because it is hard to
4014 count how many bits are in them). */
4020 /* -0x7f is the same as 0x80. So deal with it by adding one to
4021 the number of bits. Two's complement represention octals
4022 can't have a '-' in front. */
4023 if (sign == -1 && !twos_complement_representation)
4034 /* It's *BITS which has the interesting information. */
4038 static struct type *
4039 read_range_type (char **pp, int typenums[2], int type_size,
4040 struct objfile *objfile)
4042 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4043 char *orig_pp = *pp;
4048 struct type *result_type;
4049 struct type *index_type = NULL;
4051 /* First comes a type we are a subrange of.
4052 In C it is usually 0, 1 or the type being defined. */
4053 if (read_type_number (pp, rangenums) != 0)
4054 return error_type (pp, objfile);
4055 self_subrange = (rangenums[0] == typenums[0] &&
4056 rangenums[1] == typenums[1]);
4061 index_type = read_type (pp, objfile);
4064 /* A semicolon should now follow; skip it. */
4068 /* The remaining two operands are usually lower and upper bounds
4069 of the range. But in some special cases they mean something else. */
4070 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4071 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4073 if (n2bits == -1 || n3bits == -1)
4074 return error_type (pp, objfile);
4077 goto handle_true_range;
4079 /* If limits are huge, must be large integral type. */
4080 if (n2bits != 0 || n3bits != 0)
4082 char got_signed = 0;
4083 char got_unsigned = 0;
4084 /* Number of bits in the type. */
4087 /* If a type size attribute has been specified, the bounds of
4088 the range should fit in this size. If the lower bounds needs
4089 more bits than the upper bound, then the type is signed. */
4090 if (n2bits <= type_size && n3bits <= type_size)
4092 if (n2bits == type_size && n2bits > n3bits)
4098 /* Range from 0 to <large number> is an unsigned large integral type. */
4099 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4104 /* Range from <large number> to <large number>-1 is a large signed
4105 integral type. Take care of the case where <large number> doesn't
4106 fit in a long but <large number>-1 does. */
4107 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4108 || (n2bits != 0 && n3bits == 0
4109 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4116 if (got_signed || got_unsigned)
4117 return init_integer_type (objfile, nbits, got_unsigned, NULL);
4119 return error_type (pp, objfile);
4122 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4123 if (self_subrange && n2 == 0 && n3 == 0)
4124 return init_type (objfile, TYPE_CODE_VOID, 1, NULL);
4126 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4127 is the width in bytes.
4129 Fortran programs appear to use this for complex types also. To
4130 distinguish between floats and complex, g77 (and others?) seem
4131 to use self-subranges for the complexes, and subranges of int for
4134 Also note that for complexes, g77 sets n2 to the size of one of
4135 the member floats, not the whole complex beast. My guess is that
4136 this was to work well with pre-COMPLEX versions of gdb. */
4138 if (n3 == 0 && n2 > 0)
4140 struct type *float_type
4141 = init_float_type (objfile, n2 * TARGET_CHAR_BIT, NULL, NULL);
4144 return init_complex_type (objfile, NULL, float_type);
4149 /* If the upper bound is -1, it must really be an unsigned integral. */
4151 else if (n2 == 0 && n3 == -1)
4153 int bits = type_size;
4157 /* We don't know its size. It is unsigned int or unsigned
4158 long. GCC 2.3.3 uses this for long long too, but that is
4159 just a GDB 3.5 compatibility hack. */
4160 bits = gdbarch_int_bit (gdbarch);
4163 return init_integer_type (objfile, bits, 1, NULL);
4166 /* Special case: char is defined (Who knows why) as a subrange of
4167 itself with range 0-127. */
4168 else if (self_subrange && n2 == 0 && n3 == 127)
4170 struct type *type = init_integer_type (objfile, 1, 0, NULL);
4171 TYPE_NOSIGN (type) = 1;
4174 /* We used to do this only for subrange of self or subrange of int. */
4177 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4178 "unsigned long", and we already checked for that,
4179 so don't need to test for it here. */
4182 /* n3 actually gives the size. */
4183 return init_integer_type (objfile, -n3 * TARGET_CHAR_BIT, 1, NULL);
4185 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4186 unsigned n-byte integer. But do require n to be a power of
4187 two; we don't want 3- and 5-byte integers flying around. */
4193 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4196 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4197 return init_integer_type (objfile, bytes * TARGET_CHAR_BIT, 1, NULL);
4200 /* I think this is for Convex "long long". Since I don't know whether
4201 Convex sets self_subrange, I also accept that particular size regardless
4202 of self_subrange. */
4203 else if (n3 == 0 && n2 < 0
4205 || n2 == -gdbarch_long_long_bit
4206 (gdbarch) / TARGET_CHAR_BIT))
4207 return init_integer_type (objfile, -n2 * TARGET_CHAR_BIT, 0, NULL);
4208 else if (n2 == -n3 - 1)
4211 return init_integer_type (objfile, 8, 0, NULL);
4213 return init_integer_type (objfile, 16, 0, NULL);
4214 if (n3 == 0x7fffffff)
4215 return init_integer_type (objfile, 32, 0, NULL);
4218 /* We have a real range type on our hands. Allocate space and
4219 return a real pointer. */
4223 index_type = objfile_type (objfile)->builtin_int;
4225 index_type = *dbx_lookup_type (rangenums, objfile);
4226 if (index_type == NULL)
4228 /* Does this actually ever happen? Is that why we are worrying
4229 about dealing with it rather than just calling error_type? */
4231 complaint (&symfile_complaints,
4232 _("base type %d of range type is not defined"), rangenums[1]);
4234 index_type = objfile_type (objfile)->builtin_int;
4238 = create_static_range_type ((struct type *) NULL, index_type, n2, n3);
4239 return (result_type);
4242 /* Read in an argument list. This is a list of types, separated by commas
4243 and terminated with END. Return the list of types read in, or NULL
4244 if there is an error. */
4246 static struct field *
4247 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4250 /* FIXME! Remove this arbitrary limit! */
4251 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4258 /* Invalid argument list: no ','. */
4261 STABS_CONTINUE (pp, objfile);
4262 types[n++] = read_type (pp, objfile);
4264 (*pp)++; /* get past `end' (the ':' character). */
4268 /* We should read at least the THIS parameter here. Some broken stabs
4269 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4270 have been present ";-16,(0,43)" reference instead. This way the
4271 excessive ";" marker prematurely stops the parameters parsing. */
4273 complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
4276 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4284 rval = XCNEWVEC (struct field, n);
4285 for (i = 0; i < n; i++)
4286 rval[i].type = types[i];
4291 /* Common block handling. */
4293 /* List of symbols declared since the last BCOMM. This list is a tail
4294 of local_symbols. When ECOMM is seen, the symbols on the list
4295 are noted so their proper addresses can be filled in later,
4296 using the common block base address gotten from the assembler
4299 static struct pending *common_block;
4300 static int common_block_i;
4302 /* Name of the current common block. We get it from the BCOMM instead of the
4303 ECOMM to match IBM documentation (even though IBM puts the name both places
4304 like everyone else). */
4305 static char *common_block_name;
4307 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4308 to remain after this function returns. */
4311 common_block_start (char *name, struct objfile *objfile)
4313 if (common_block_name != NULL)
4315 complaint (&symfile_complaints,
4316 _("Invalid symbol data: common block within common block"));
4318 common_block = local_symbols;
4319 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4320 common_block_name = (char *) obstack_copy0 (&objfile->objfile_obstack, name,
4324 /* Process a N_ECOMM symbol. */
4327 common_block_end (struct objfile *objfile)
4329 /* Symbols declared since the BCOMM are to have the common block
4330 start address added in when we know it. common_block and
4331 common_block_i point to the first symbol after the BCOMM in
4332 the local_symbols list; copy the list and hang it off the
4333 symbol for the common block name for later fixup. */
4336 struct pending *newobj = 0;
4337 struct pending *next;
4340 if (common_block_name == NULL)
4342 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4346 sym = allocate_symbol (objfile);
4347 /* Note: common_block_name already saved on objfile_obstack. */
4348 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4349 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
4351 /* Now we copy all the symbols which have been defined since the BCOMM. */
4353 /* Copy all the struct pendings before common_block. */
4354 for (next = local_symbols;
4355 next != NULL && next != common_block;
4358 for (j = 0; j < next->nsyms; j++)
4359 add_symbol_to_list (next->symbol[j], &newobj);
4362 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4363 NULL, it means copy all the local symbols (which we already did
4366 if (common_block != NULL)
4367 for (j = common_block_i; j < common_block->nsyms; j++)
4368 add_symbol_to_list (common_block->symbol[j], &newobj);
4370 SYMBOL_TYPE (sym) = (struct type *) newobj;
4372 /* Should we be putting local_symbols back to what it was?
4375 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4376 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4377 global_sym_chain[i] = sym;
4378 common_block_name = NULL;
4381 /* Add a common block's start address to the offset of each symbol
4382 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4383 the common block name). */
4386 fix_common_block (struct symbol *sym, CORE_ADDR valu)
4388 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4390 for (; next; next = next->next)
4394 for (j = next->nsyms - 1; j >= 0; j--)
4395 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4401 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4402 See add_undefined_type for more details. */
4405 add_undefined_type_noname (struct type *type, int typenums[2])
4409 nat.typenums[0] = typenums [0];
4410 nat.typenums[1] = typenums [1];
4413 if (noname_undefs_length == noname_undefs_allocated)
4415 noname_undefs_allocated *= 2;
4416 noname_undefs = (struct nat *)
4417 xrealloc ((char *) noname_undefs,
4418 noname_undefs_allocated * sizeof (struct nat));
4420 noname_undefs[noname_undefs_length++] = nat;
4423 /* Add TYPE to the UNDEF_TYPES vector.
4424 See add_undefined_type for more details. */
4427 add_undefined_type_1 (struct type *type)
4429 if (undef_types_length == undef_types_allocated)
4431 undef_types_allocated *= 2;
4432 undef_types = (struct type **)
4433 xrealloc ((char *) undef_types,
4434 undef_types_allocated * sizeof (struct type *));
4436 undef_types[undef_types_length++] = type;
4439 /* What about types defined as forward references inside of a small lexical
4441 /* Add a type to the list of undefined types to be checked through
4442 once this file has been read in.
4444 In practice, we actually maintain two such lists: The first list
4445 (UNDEF_TYPES) is used for types whose name has been provided, and
4446 concerns forward references (eg 'xs' or 'xu' forward references);
4447 the second list (NONAME_UNDEFS) is used for types whose name is
4448 unknown at creation time, because they were referenced through
4449 their type number before the actual type was declared.
4450 This function actually adds the given type to the proper list. */
4453 add_undefined_type (struct type *type, int typenums[2])
4455 if (TYPE_TAG_NAME (type) == NULL)
4456 add_undefined_type_noname (type, typenums);
4458 add_undefined_type_1 (type);
4461 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4464 cleanup_undefined_types_noname (struct objfile *objfile)
4468 for (i = 0; i < noname_undefs_length; i++)
4470 struct nat nat = noname_undefs[i];
4473 type = dbx_lookup_type (nat.typenums, objfile);
4474 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4476 /* The instance flags of the undefined type are still unset,
4477 and needs to be copied over from the reference type.
4478 Since replace_type expects them to be identical, we need
4479 to set these flags manually before hand. */
4480 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4481 replace_type (nat.type, *type);
4485 noname_undefs_length = 0;
4488 /* Go through each undefined type, see if it's still undefined, and fix it
4489 up if possible. We have two kinds of undefined types:
4491 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4492 Fix: update array length using the element bounds
4493 and the target type's length.
4494 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4495 yet defined at the time a pointer to it was made.
4496 Fix: Do a full lookup on the struct/union tag. */
4499 cleanup_undefined_types_1 (void)
4503 /* Iterate over every undefined type, and look for a symbol whose type
4504 matches our undefined type. The symbol matches if:
4505 1. It is a typedef in the STRUCT domain;
4506 2. It has the same name, and same type code;
4507 3. The instance flags are identical.
4509 It is important to check the instance flags, because we have seen
4510 examples where the debug info contained definitions such as:
4512 "foo_t:t30=B31=xefoo_t:"
4514 In this case, we have created an undefined type named "foo_t" whose
4515 instance flags is null (when processing "xefoo_t"), and then created
4516 another type with the same name, but with different instance flags
4517 ('B' means volatile). I think that the definition above is wrong,
4518 since the same type cannot be volatile and non-volatile at the same
4519 time, but we need to be able to cope with it when it happens. The
4520 approach taken here is to treat these two types as different. */
4522 for (type = undef_types; type < undef_types + undef_types_length; type++)
4524 switch (TYPE_CODE (*type))
4527 case TYPE_CODE_STRUCT:
4528 case TYPE_CODE_UNION:
4529 case TYPE_CODE_ENUM:
4531 /* Check if it has been defined since. Need to do this here
4532 as well as in check_typedef to deal with the (legitimate in
4533 C though not C++) case of several types with the same name
4534 in different source files. */
4535 if (TYPE_STUB (*type))
4537 struct pending *ppt;
4539 /* Name of the type, without "struct" or "union". */
4540 const char *type_name = TYPE_TAG_NAME (*type);
4542 if (type_name == NULL)
4544 complaint (&symfile_complaints, _("need a type name"));
4547 for (ppt = file_symbols; ppt; ppt = ppt->next)
4549 for (i = 0; i < ppt->nsyms; i++)
4551 struct symbol *sym = ppt->symbol[i];
4553 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4554 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4555 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4557 && (TYPE_INSTANCE_FLAGS (*type) ==
4558 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4559 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4561 replace_type (*type, SYMBOL_TYPE (sym));
4570 complaint (&symfile_complaints,
4571 _("forward-referenced types left unresolved, "
4579 undef_types_length = 0;
4582 /* Try to fix all the undefined types we ecountered while processing
4586 cleanup_undefined_stabs_types (struct objfile *objfile)
4588 cleanup_undefined_types_1 ();
4589 cleanup_undefined_types_noname (objfile);
4592 /* Scan through all of the global symbols defined in the object file,
4593 assigning values to the debugging symbols that need to be assigned
4594 to. Get these symbols from the minimal symbol table. */
4597 scan_file_globals (struct objfile *objfile)
4600 struct minimal_symbol *msymbol;
4601 struct symbol *sym, *prev;
4602 struct objfile *resolve_objfile;
4604 /* SVR4 based linkers copy referenced global symbols from shared
4605 libraries to the main executable.
4606 If we are scanning the symbols for a shared library, try to resolve
4607 them from the minimal symbols of the main executable first. */
4609 if (symfile_objfile && objfile != symfile_objfile)
4610 resolve_objfile = symfile_objfile;
4612 resolve_objfile = objfile;
4616 /* Avoid expensive loop through all minimal symbols if there are
4617 no unresolved symbols. */
4618 for (hash = 0; hash < HASHSIZE; hash++)
4620 if (global_sym_chain[hash])
4623 if (hash >= HASHSIZE)
4626 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4630 /* Skip static symbols. */
4631 switch (MSYMBOL_TYPE (msymbol))
4643 /* Get the hash index and check all the symbols
4644 under that hash index. */
4646 hash = hashname (MSYMBOL_LINKAGE_NAME (msymbol));
4648 for (sym = global_sym_chain[hash]; sym;)
4650 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol),
4651 SYMBOL_LINKAGE_NAME (sym)) == 0)
4653 /* Splice this symbol out of the hash chain and
4654 assign the value we have to it. */
4657 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4661 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4664 /* Check to see whether we need to fix up a common block. */
4665 /* Note: this code might be executed several times for
4666 the same symbol if there are multiple references. */
4669 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4671 fix_common_block (sym,
4672 MSYMBOL_VALUE_ADDRESS (resolve_objfile,
4677 SYMBOL_VALUE_ADDRESS (sym)
4678 = MSYMBOL_VALUE_ADDRESS (resolve_objfile, msymbol);
4680 SYMBOL_SECTION (sym) = MSYMBOL_SECTION (msymbol);
4685 sym = SYMBOL_VALUE_CHAIN (prev);
4689 sym = global_sym_chain[hash];
4695 sym = SYMBOL_VALUE_CHAIN (sym);
4699 if (resolve_objfile == objfile)
4701 resolve_objfile = objfile;
4704 /* Change the storage class of any remaining unresolved globals to
4705 LOC_UNRESOLVED and remove them from the chain. */
4706 for (hash = 0; hash < HASHSIZE; hash++)
4708 sym = global_sym_chain[hash];
4712 sym = SYMBOL_VALUE_CHAIN (sym);
4714 /* Change the symbol address from the misleading chain value
4716 SYMBOL_VALUE_ADDRESS (prev) = 0;
4718 /* Complain about unresolved common block symbols. */
4719 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4720 SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
4722 complaint (&symfile_complaints,
4723 _("%s: common block `%s' from "
4724 "global_sym_chain unresolved"),
4725 objfile_name (objfile), SYMBOL_PRINT_NAME (prev));
4728 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4731 /* Initialize anything that needs initializing when starting to read
4732 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4736 stabsread_init (void)
4740 /* Initialize anything that needs initializing when a completely new
4741 symbol file is specified (not just adding some symbols from another
4742 file, e.g. a shared library). */
4745 stabsread_new_init (void)
4747 /* Empty the hash table of global syms looking for values. */
4748 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4751 /* Initialize anything that needs initializing at the same time as
4752 start_symtab() is called. */
4757 global_stabs = NULL; /* AIX COFF */
4758 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4759 n_this_object_header_files = 1;
4760 type_vector_length = 0;
4761 type_vector = (struct type **) 0;
4763 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4764 common_block_name = NULL;
4767 /* Call after end_symtab(). */
4774 xfree (type_vector);
4777 type_vector_length = 0;
4778 previous_stab_code = 0;
4782 finish_global_stabs (struct objfile *objfile)
4786 patch_block_stabs (global_symbols, global_stabs, objfile);
4787 xfree (global_stabs);
4788 global_stabs = NULL;
4792 /* Find the end of the name, delimited by a ':', but don't match
4793 ObjC symbols which look like -[Foo bar::]:bla. */
4795 find_name_end (char *name)
4799 if (s[0] == '-' || *s == '+')
4801 /* Must be an ObjC method symbol. */
4804 error (_("invalid symbol name \"%s\""), name);
4806 s = strchr (s, ']');
4809 error (_("invalid symbol name \"%s\""), name);
4811 return strchr (s, ':');
4815 return strchr (s, ':');
4819 /* Initializer for this module. */
4822 _initialize_stabsread (void)
4824 rs6000_builtin_type_data = register_objfile_data ();
4826 undef_types_allocated = 20;
4827 undef_types_length = 0;
4828 undef_types = XNEWVEC (struct type *, undef_types_allocated);
4830 noname_undefs_allocated = 20;
4831 noname_undefs_length = 0;
4832 noname_undefs = XNEWVEC (struct nat, noname_undefs_allocated);
4834 stab_register_index = register_symbol_register_impl (LOC_REGISTER,
4835 &stab_register_funcs);
4836 stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
4837 &stab_register_funcs);