1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Support routines for reading and decoding debugging information in
23 the "stabs" format. This format is used with many systems that use
24 the a.out object file format, as well as some systems that use
25 COFF or ELF where the stabs data is placed in a special section.
26 Avoid placing any object file format specific code in this file. */
29 #include "gdb_string.h"
31 #include "gdb_obstack.h"
34 #include "expression.h"
37 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
39 #include "aout/aout64.h"
40 #include "gdb-stabs.h"
42 #include "complaints.h"
47 #include "cp-support.h"
48 #include "gdb_assert.h"
52 /* Ask stabsread.h to define the vars it normally declares `extern'. */
55 #include "stabsread.h" /* Our own declarations */
58 extern void _initialize_stabsread (void);
60 /* The routines that read and process a complete stabs for a C struct or
61 C++ class pass lists of data member fields and lists of member function
62 fields in an instance of a field_info structure, as defined below.
63 This is part of some reorganization of low level C++ support and is
64 expected to eventually go away... (FIXME) */
70 struct nextfield *next;
72 /* This is the raw visibility from the stab. It is not checked
73 for being one of the visibilities we recognize, so code which
74 examines this field better be able to deal. */
80 struct next_fnfieldlist
82 struct next_fnfieldlist *next;
83 struct fn_fieldlist fn_fieldlist;
89 read_one_struct_field (struct field_info *, char **, char *,
90 struct type *, struct objfile *);
92 static struct type *dbx_alloc_type (int[2], struct objfile *);
94 static long read_huge_number (char **, int, int *, int);
96 static struct type *error_type (char **, struct objfile *);
99 patch_block_stabs (struct pending *, struct pending_stabs *,
102 static void fix_common_block (struct symbol *, int);
104 static int read_type_number (char **, int *);
106 static struct type *read_type (char **, struct objfile *);
108 static struct type *read_range_type (char **, int[2], int, struct objfile *);
110 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
112 static struct type *read_sun_floating_type (char **, int[2],
115 static struct type *read_enum_type (char **, struct type *, struct objfile *);
117 static struct type *rs6000_builtin_type (int, struct objfile *);
120 read_member_functions (struct field_info *, char **, struct type *,
124 read_struct_fields (struct field_info *, char **, struct type *,
128 read_baseclasses (struct field_info *, char **, struct type *,
132 read_tilde_fields (struct field_info *, char **, struct type *,
135 static int attach_fn_fields_to_type (struct field_info *, struct type *);
137 static int attach_fields_to_type (struct field_info *, struct type *,
140 static struct type *read_struct_type (char **, struct type *,
144 static struct type *read_array_type (char **, struct type *,
147 static struct field *read_args (char **, int, struct objfile *, int *, int *);
149 static void add_undefined_type (struct type *, int[2]);
152 read_cpp_abbrev (struct field_info *, char **, struct type *,
155 static char *find_name_end (char *name);
157 static int process_reference (char **string);
159 void stabsread_clear_cache (void);
161 static const char vptr_name[] = "_vptr$";
162 static const char vb_name[] = "_vb$";
165 invalid_cpp_abbrev_complaint (const char *arg1)
167 complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
171 reg_value_complaint (int regnum, int num_regs, const char *sym)
173 complaint (&symfile_complaints,
174 _("register number %d too large (max %d) in symbol %s"),
175 regnum, num_regs - 1, sym);
179 stabs_general_complaint (const char *arg1)
181 complaint (&symfile_complaints, "%s", arg1);
184 /* Make a list of forward references which haven't been defined. */
186 static struct type **undef_types;
187 static int undef_types_allocated;
188 static int undef_types_length;
189 static struct symbol *current_symbol = NULL;
191 /* Make a list of nameless types that are undefined.
192 This happens when another type is referenced by its number
193 before this type is actually defined. For instance "t(0,1)=k(0,2)"
194 and type (0,2) is defined only later. */
201 static struct nat *noname_undefs;
202 static int noname_undefs_allocated;
203 static int noname_undefs_length;
205 /* Check for and handle cretinous stabs symbol name continuation! */
206 #define STABS_CONTINUE(pp,objfile) \
208 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
209 *(pp) = next_symbol_text (objfile); \
213 /* Look up a dbx type-number pair. Return the address of the slot
214 where the type for that number-pair is stored.
215 The number-pair is in TYPENUMS.
217 This can be used for finding the type associated with that pair
218 or for associating a new type with the pair. */
220 static struct type **
221 dbx_lookup_type (int typenums[2], struct objfile *objfile)
223 int filenum = typenums[0];
224 int index = typenums[1];
227 struct header_file *f;
230 if (filenum == -1) /* -1,-1 is for temporary types. */
233 if (filenum < 0 || filenum >= n_this_object_header_files)
235 complaint (&symfile_complaints,
236 _("Invalid symbol data: type number "
237 "(%d,%d) out of range at symtab pos %d."),
238 filenum, index, symnum);
246 /* Caller wants address of address of type. We think
247 that negative (rs6k builtin) types will never appear as
248 "lvalues", (nor should they), so we stuff the real type
249 pointer into a temp, and return its address. If referenced,
250 this will do the right thing. */
251 static struct type *temp_type;
253 temp_type = rs6000_builtin_type (index, objfile);
257 /* Type is defined outside of header files.
258 Find it in this object file's type vector. */
259 if (index >= type_vector_length)
261 old_len = type_vector_length;
264 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
265 type_vector = (struct type **)
266 xmalloc (type_vector_length * sizeof (struct type *));
268 while (index >= type_vector_length)
270 type_vector_length *= 2;
272 type_vector = (struct type **)
273 xrealloc ((char *) type_vector,
274 (type_vector_length * sizeof (struct type *)));
275 memset (&type_vector[old_len], 0,
276 (type_vector_length - old_len) * sizeof (struct type *));
278 return (&type_vector[index]);
282 real_filenum = this_object_header_files[filenum];
284 if (real_filenum >= N_HEADER_FILES (objfile))
286 static struct type *temp_type;
288 warning (_("GDB internal error: bad real_filenum"));
291 temp_type = objfile_type (objfile)->builtin_error;
295 f = HEADER_FILES (objfile) + real_filenum;
297 f_orig_length = f->length;
298 if (index >= f_orig_length)
300 while (index >= f->length)
304 f->vector = (struct type **)
305 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
306 memset (&f->vector[f_orig_length], 0,
307 (f->length - f_orig_length) * sizeof (struct type *));
309 return (&f->vector[index]);
313 /* Make sure there is a type allocated for type numbers TYPENUMS
314 and return the type object.
315 This can create an empty (zeroed) type object.
316 TYPENUMS may be (-1, -1) to return a new type object that is not
317 put into the type vector, and so may not be referred to by number. */
320 dbx_alloc_type (int typenums[2], struct objfile *objfile)
322 struct type **type_addr;
324 if (typenums[0] == -1)
326 return (alloc_type (objfile));
329 type_addr = dbx_lookup_type (typenums, objfile);
331 /* If we are referring to a type not known at all yet,
332 allocate an empty type for it.
333 We will fill it in later if we find out how. */
336 *type_addr = alloc_type (objfile);
342 /* for all the stabs in a given stab vector, build appropriate types
343 and fix their symbols in given symbol vector. */
346 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
347 struct objfile *objfile)
356 /* for all the stab entries, find their corresponding symbols and
357 patch their types! */
359 for (ii = 0; ii < stabs->count; ++ii)
361 name = stabs->stab[ii];
362 pp = (char *) strchr (name, ':');
363 gdb_assert (pp); /* Must find a ':' or game's over. */
367 pp = (char *) strchr (pp, ':');
369 sym = find_symbol_in_list (symbols, name, pp - name);
372 /* FIXME-maybe: it would be nice if we noticed whether
373 the variable was defined *anywhere*, not just whether
374 it is defined in this compilation unit. But neither
375 xlc or GCC seem to need such a definition, and until
376 we do psymtabs (so that the minimal symbols from all
377 compilation units are available now), I'm not sure
378 how to get the information. */
380 /* On xcoff, if a global is defined and never referenced,
381 ld will remove it from the executable. There is then
382 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
383 sym = (struct symbol *)
384 obstack_alloc (&objfile->objfile_obstack,
385 sizeof (struct symbol));
387 memset (sym, 0, sizeof (struct symbol));
388 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
389 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
390 SYMBOL_SET_LINKAGE_NAME
391 (sym, obsavestring (name, pp - name,
392 &objfile->objfile_obstack));
394 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
396 /* I don't think the linker does this with functions,
397 so as far as I know this is never executed.
398 But it doesn't hurt to check. */
400 lookup_function_type (read_type (&pp, objfile));
404 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
406 add_symbol_to_list (sym, &global_symbols);
411 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
414 lookup_function_type (read_type (&pp, objfile));
418 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
426 /* Read a number by which a type is referred to in dbx data,
427 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
428 Just a single number N is equivalent to (0,N).
429 Return the two numbers by storing them in the vector TYPENUMS.
430 TYPENUMS will then be used as an argument to dbx_lookup_type.
432 Returns 0 for success, -1 for error. */
435 read_type_number (char **pp, int *typenums)
442 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
445 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
452 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
460 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
461 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
462 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
463 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
465 /* Structure for storing pointers to reference definitions for fast lookup
466 during "process_later". */
475 #define MAX_CHUNK_REFS 100
476 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
477 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
479 static struct ref_map *ref_map;
481 /* Ptr to free cell in chunk's linked list. */
482 static int ref_count = 0;
484 /* Number of chunks malloced. */
485 static int ref_chunk = 0;
487 /* This file maintains a cache of stabs aliases found in the symbol
488 table. If the symbol table changes, this cache must be cleared
489 or we are left holding onto data in invalid obstacks. */
491 stabsread_clear_cache (void)
497 /* Create array of pointers mapping refids to symbols and stab strings.
498 Add pointers to reference definition symbols and/or their values as we
499 find them, using their reference numbers as our index.
500 These will be used later when we resolve references. */
502 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
506 if (refnum >= ref_count)
507 ref_count = refnum + 1;
508 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
510 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
511 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
513 ref_map = (struct ref_map *)
514 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
515 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
516 new_chunks * REF_CHUNK_SIZE);
517 ref_chunk += new_chunks;
519 ref_map[refnum].stabs = stabs;
520 ref_map[refnum].sym = sym;
521 ref_map[refnum].value = value;
524 /* Return defined sym for the reference REFNUM. */
526 ref_search (int refnum)
528 if (refnum < 0 || refnum > ref_count)
530 return ref_map[refnum].sym;
533 /* Parse a reference id in STRING and return the resulting
534 reference number. Move STRING beyond the reference id. */
537 process_reference (char **string)
545 /* Advance beyond the initial '#'. */
548 /* Read number as reference id. */
549 while (*p && isdigit (*p))
551 refnum = refnum * 10 + *p - '0';
558 /* If STRING defines a reference, store away a pointer to the reference
559 definition for later use. Return the reference number. */
562 symbol_reference_defined (char **string)
567 refnum = process_reference (&p);
569 /* Defining symbols end in '='. */
572 /* Symbol is being defined here. */
578 /* Must be a reference. Either the symbol has already been defined,
579 or this is a forward reference to it. */
586 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
588 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
590 if (regno >= gdbarch_num_regs (gdbarch)
591 + gdbarch_num_pseudo_regs (gdbarch))
593 reg_value_complaint (regno,
594 gdbarch_num_regs (gdbarch)
595 + gdbarch_num_pseudo_regs (gdbarch),
596 SYMBOL_PRINT_NAME (sym));
598 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless. */
604 static const struct symbol_register_ops stab_register_funcs = {
609 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
610 struct objfile *objfile)
612 struct gdbarch *gdbarch = get_objfile_arch (objfile);
614 char *p = (char *) find_name_end (string);
618 char *new_name = NULL;
620 /* We would like to eliminate nameless symbols, but keep their types.
621 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
622 to type 2, but, should not create a symbol to address that type. Since
623 the symbol will be nameless, there is no way any user can refer to it. */
627 /* Ignore syms with empty names. */
631 /* Ignore old-style symbols from cc -go. */
641 /* If a nameless stab entry, all we need is the type, not the symbol.
642 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
643 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
645 current_symbol = sym = (struct symbol *)
646 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
647 memset (sym, 0, sizeof (struct symbol));
649 switch (type & N_TYPE)
652 SYMBOL_SECTION (sym) = SECT_OFF_TEXT (objfile);
655 SYMBOL_SECTION (sym) = SECT_OFF_DATA (objfile);
658 SYMBOL_SECTION (sym) = SECT_OFF_BSS (objfile);
662 if (processing_gcc_compilation)
664 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
665 number of bytes occupied by a type or object, which we ignore. */
666 SYMBOL_LINE (sym) = desc;
670 SYMBOL_LINE (sym) = 0; /* unknown */
673 if (is_cplus_marker (string[0]))
675 /* Special GNU C++ names. */
679 SYMBOL_SET_LINKAGE_NAME (sym, "this");
682 case 'v': /* $vtbl_ptr_type */
686 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
690 /* This was an anonymous type that was never fixed up. */
694 /* SunPRO (3.0 at least) static variable encoding. */
695 if (gdbarch_static_transform_name_p (gdbarch))
697 /* ... fall through ... */
700 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
702 goto normal; /* Do *something* with it. */
708 SYMBOL_SET_LANGUAGE (sym, current_subfile->language);
709 if (SYMBOL_LANGUAGE (sym) == language_cplus)
711 char *name = alloca (p - string + 1);
713 memcpy (name, string, p - string);
714 name[p - string] = '\0';
715 new_name = cp_canonicalize_string (name);
717 if (new_name != NULL)
719 SYMBOL_SET_NAMES (sym, new_name, strlen (new_name), 1, objfile);
723 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
725 if (SYMBOL_LANGUAGE (sym) == language_cplus)
726 cp_scan_for_anonymous_namespaces (sym);
731 /* Determine the type of name being defined. */
733 /* Getting GDB to correctly skip the symbol on an undefined symbol
734 descriptor and not ever dump core is a very dodgy proposition if
735 we do things this way. I say the acorn RISC machine can just
736 fix their compiler. */
737 /* The Acorn RISC machine's compiler can put out locals that don't
738 start with "234=" or "(3,4)=", so assume anything other than the
739 deftypes we know how to handle is a local. */
740 if (!strchr ("cfFGpPrStTvVXCR", *p))
742 if (isdigit (*p) || *p == '(' || *p == '-')
751 /* c is a special case, not followed by a type-number.
752 SYMBOL:c=iVALUE for an integer constant symbol.
753 SYMBOL:c=rVALUE for a floating constant symbol.
754 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
755 e.g. "b:c=e6,0" for "const b = blob1"
756 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
759 SYMBOL_CLASS (sym) = LOC_CONST;
760 SYMBOL_TYPE (sym) = error_type (&p, objfile);
761 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
762 add_symbol_to_list (sym, &file_symbols);
772 struct type *dbl_type;
774 /* FIXME-if-picky-about-floating-accuracy: Should be using
775 target arithmetic to get the value. real.c in GCC
776 probably has the necessary code. */
778 dbl_type = objfile_type (objfile)->builtin_double;
780 obstack_alloc (&objfile->objfile_obstack,
781 TYPE_LENGTH (dbl_type));
782 store_typed_floating (dbl_valu, dbl_type, d);
784 SYMBOL_TYPE (sym) = dbl_type;
785 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
786 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
791 /* Defining integer constants this way is kind of silly,
792 since 'e' constants allows the compiler to give not
793 only the value, but the type as well. C has at least
794 int, long, unsigned int, and long long as constant
795 types; other languages probably should have at least
796 unsigned as well as signed constants. */
798 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
799 SYMBOL_VALUE (sym) = atoi (p);
800 SYMBOL_CLASS (sym) = LOC_CONST;
806 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
807 SYMBOL_VALUE (sym) = atoi (p);
808 SYMBOL_CLASS (sym) = LOC_CONST;
814 struct type *range_type;
817 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
818 gdb_byte *string_value;
820 if (quote != '\'' && quote != '"')
822 SYMBOL_CLASS (sym) = LOC_CONST;
823 SYMBOL_TYPE (sym) = error_type (&p, objfile);
824 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
825 add_symbol_to_list (sym, &file_symbols);
829 /* Find matching quote, rejecting escaped quotes. */
830 while (*p && *p != quote)
832 if (*p == '\\' && p[1] == quote)
834 string_local[ind] = (gdb_byte) quote;
840 string_local[ind] = (gdb_byte) (*p);
847 SYMBOL_CLASS (sym) = LOC_CONST;
848 SYMBOL_TYPE (sym) = error_type (&p, objfile);
849 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
850 add_symbol_to_list (sym, &file_symbols);
854 /* NULL terminate the string. */
855 string_local[ind] = 0;
857 = create_range_type (NULL,
858 objfile_type (objfile)->builtin_int,
860 SYMBOL_TYPE (sym) = create_array_type (NULL,
861 objfile_type (objfile)->builtin_char,
863 string_value = obstack_alloc (&objfile->objfile_obstack, ind + 1);
864 memcpy (string_value, string_local, ind + 1);
867 SYMBOL_VALUE_BYTES (sym) = string_value;
868 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
873 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
874 can be represented as integral.
875 e.g. "b:c=e6,0" for "const b = blob1"
876 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
878 SYMBOL_CLASS (sym) = LOC_CONST;
879 SYMBOL_TYPE (sym) = read_type (&p, objfile);
883 SYMBOL_TYPE (sym) = error_type (&p, objfile);
888 /* If the value is too big to fit in an int (perhaps because
889 it is unsigned), or something like that, we silently get
890 a bogus value. The type and everything else about it is
891 correct. Ideally, we should be using whatever we have
892 available for parsing unsigned and long long values,
894 SYMBOL_VALUE (sym) = atoi (p);
899 SYMBOL_CLASS (sym) = LOC_CONST;
900 SYMBOL_TYPE (sym) = error_type (&p, objfile);
903 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
904 add_symbol_to_list (sym, &file_symbols);
908 /* The name of a caught exception. */
909 SYMBOL_TYPE (sym) = read_type (&p, objfile);
910 SYMBOL_CLASS (sym) = LOC_LABEL;
911 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
912 SYMBOL_VALUE_ADDRESS (sym) = valu;
913 add_symbol_to_list (sym, &local_symbols);
917 /* A static function definition. */
918 SYMBOL_TYPE (sym) = read_type (&p, objfile);
919 SYMBOL_CLASS (sym) = LOC_BLOCK;
920 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
921 add_symbol_to_list (sym, &file_symbols);
922 /* fall into process_function_types. */
924 process_function_types:
925 /* Function result types are described as the result type in stabs.
926 We need to convert this to the function-returning-type-X type
927 in GDB. E.g. "int" is converted to "function returning int". */
928 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
929 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
931 /* All functions in C++ have prototypes. Stabs does not offer an
932 explicit way to identify prototyped or unprototyped functions,
933 but both GCC and Sun CC emit stabs for the "call-as" type rather
934 than the "declared-as" type for unprototyped functions, so
935 we treat all functions as if they were prototyped. This is used
936 primarily for promotion when calling the function from GDB. */
937 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
939 /* fall into process_prototype_types. */
941 process_prototype_types:
942 /* Sun acc puts declared types of arguments here. */
945 struct type *ftype = SYMBOL_TYPE (sym);
950 /* Obtain a worst case guess for the number of arguments
951 by counting the semicolons. */
958 /* Allocate parameter information fields and fill them in. */
959 TYPE_FIELDS (ftype) = (struct field *)
960 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
965 /* A type number of zero indicates the start of varargs.
966 FIXME: GDB currently ignores vararg functions. */
967 if (p[0] == '0' && p[1] == '\0')
969 ptype = read_type (&p, objfile);
971 /* The Sun compilers mark integer arguments, which should
972 be promoted to the width of the calling conventions, with
973 a type which references itself. This type is turned into
974 a TYPE_CODE_VOID type by read_type, and we have to turn
975 it back into builtin_int here.
976 FIXME: Do we need a new builtin_promoted_int_arg ? */
977 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
978 ptype = objfile_type (objfile)->builtin_int;
979 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
980 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
982 TYPE_NFIELDS (ftype) = nparams;
983 TYPE_PROTOTYPED (ftype) = 1;
988 /* A global function definition. */
989 SYMBOL_TYPE (sym) = read_type (&p, objfile);
990 SYMBOL_CLASS (sym) = LOC_BLOCK;
991 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
992 add_symbol_to_list (sym, &global_symbols);
993 goto process_function_types;
996 /* For a class G (global) symbol, it appears that the
997 value is not correct. It is necessary to search for the
998 corresponding linker definition to find the value.
999 These definitions appear at the end of the namelist. */
1000 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1001 SYMBOL_CLASS (sym) = LOC_STATIC;
1002 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1003 /* Don't add symbol references to global_sym_chain.
1004 Symbol references don't have valid names and wont't match up with
1005 minimal symbols when the global_sym_chain is relocated.
1006 We'll fixup symbol references when we fixup the defining symbol. */
1007 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1009 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1010 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1011 global_sym_chain[i] = sym;
1013 add_symbol_to_list (sym, &global_symbols);
1016 /* This case is faked by a conditional above,
1017 when there is no code letter in the dbx data.
1018 Dbx data never actually contains 'l'. */
1021 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1022 SYMBOL_CLASS (sym) = LOC_LOCAL;
1023 SYMBOL_VALUE (sym) = valu;
1024 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1025 add_symbol_to_list (sym, &local_symbols);
1030 /* pF is a two-letter code that means a function parameter in Fortran.
1031 The type-number specifies the type of the return value.
1032 Translate it into a pointer-to-function type. */
1036 = lookup_pointer_type
1037 (lookup_function_type (read_type (&p, objfile)));
1040 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1042 SYMBOL_CLASS (sym) = LOC_ARG;
1043 SYMBOL_VALUE (sym) = valu;
1044 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1045 SYMBOL_IS_ARGUMENT (sym) = 1;
1046 add_symbol_to_list (sym, &local_symbols);
1048 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1050 /* On little-endian machines, this crud is never necessary,
1051 and, if the extra bytes contain garbage, is harmful. */
1055 /* If it's gcc-compiled, if it says `short', believe it. */
1056 if (processing_gcc_compilation
1057 || gdbarch_believe_pcc_promotion (gdbarch))
1060 if (!gdbarch_believe_pcc_promotion (gdbarch))
1062 /* If PCC says a parameter is a short or a char, it is
1064 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1065 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1066 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1069 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1070 ? objfile_type (objfile)->builtin_unsigned_int
1071 : objfile_type (objfile)->builtin_int;
1077 /* acc seems to use P to declare the prototypes of functions that
1078 are referenced by this file. gdb is not prepared to deal
1079 with this extra information. FIXME, it ought to. */
1082 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1083 goto process_prototype_types;
1088 /* Parameter which is in a register. */
1089 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1090 SYMBOL_CLASS (sym) = LOC_REGISTER;
1091 SYMBOL_REGISTER_OPS (sym) = &stab_register_funcs;
1092 SYMBOL_IS_ARGUMENT (sym) = 1;
1093 SYMBOL_VALUE (sym) = valu;
1094 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1095 add_symbol_to_list (sym, &local_symbols);
1099 /* Register variable (either global or local). */
1100 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1101 SYMBOL_CLASS (sym) = LOC_REGISTER;
1102 SYMBOL_REGISTER_OPS (sym) = &stab_register_funcs;
1103 SYMBOL_VALUE (sym) = valu;
1104 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1105 if (within_function)
1107 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1108 the same name to represent an argument passed in a
1109 register. GCC uses 'P' for the same case. So if we find
1110 such a symbol pair we combine it into one 'P' symbol.
1111 For Sun cc we need to do this regardless of
1112 stabs_argument_has_addr, because the compiler puts out
1113 the 'p' symbol even if it never saves the argument onto
1116 On most machines, we want to preserve both symbols, so
1117 that we can still get information about what is going on
1118 with the stack (VAX for computing args_printed, using
1119 stack slots instead of saved registers in backtraces,
1122 Note that this code illegally combines
1123 main(argc) struct foo argc; { register struct foo argc; }
1124 but this case is considered pathological and causes a warning
1125 from a decent compiler. */
1128 && local_symbols->nsyms > 0
1129 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1131 struct symbol *prev_sym;
1133 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1134 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1135 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1136 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1137 SYMBOL_LINKAGE_NAME (sym)) == 0)
1139 SYMBOL_CLASS (prev_sym) = LOC_REGISTER;
1140 SYMBOL_REGISTER_OPS (prev_sym) = &stab_register_funcs;
1141 /* Use the type from the LOC_REGISTER; that is the type
1142 that is actually in that register. */
1143 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1144 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1149 add_symbol_to_list (sym, &local_symbols);
1152 add_symbol_to_list (sym, &file_symbols);
1156 /* Static symbol at top level of file. */
1157 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1158 SYMBOL_CLASS (sym) = LOC_STATIC;
1159 SYMBOL_VALUE_ADDRESS (sym) = valu;
1160 if (gdbarch_static_transform_name_p (gdbarch)
1161 && gdbarch_static_transform_name (gdbarch,
1162 SYMBOL_LINKAGE_NAME (sym))
1163 != SYMBOL_LINKAGE_NAME (sym))
1165 struct minimal_symbol *msym;
1167 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1171 char *new_name = gdbarch_static_transform_name
1172 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1174 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1175 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1178 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1179 add_symbol_to_list (sym, &file_symbols);
1183 /* In Ada, there is no distinction between typedef and non-typedef;
1184 any type declaration implicitly has the equivalent of a typedef,
1185 and thus 't' is in fact equivalent to 'Tt'.
1187 Therefore, for Ada units, we check the character immediately
1188 before the 't', and if we do not find a 'T', then make sure to
1189 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1190 will be stored in the VAR_DOMAIN). If the symbol was indeed
1191 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1192 elsewhere, so we don't need to take care of that.
1194 This is important to do, because of forward references:
1195 The cleanup of undefined types stored in undef_types only uses
1196 STRUCT_DOMAIN symbols to perform the replacement. */
1197 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1200 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1202 /* For a nameless type, we don't want a create a symbol, thus we
1203 did not use `sym'. Return without further processing. */
1207 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1208 SYMBOL_VALUE (sym) = valu;
1209 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1210 /* C++ vagaries: we may have a type which is derived from
1211 a base type which did not have its name defined when the
1212 derived class was output. We fill in the derived class's
1213 base part member's name here in that case. */
1214 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1215 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1216 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1217 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1221 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1222 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1223 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1224 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1227 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1229 /* gcc-2.6 or later (when using -fvtable-thunks)
1230 emits a unique named type for a vtable entry.
1231 Some gdb code depends on that specific name. */
1232 extern const char vtbl_ptr_name[];
1234 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1235 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1236 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1238 /* If we are giving a name to a type such as "pointer to
1239 foo" or "function returning foo", we better not set
1240 the TYPE_NAME. If the program contains "typedef char
1241 *caddr_t;", we don't want all variables of type char
1242 * to print as caddr_t. This is not just a
1243 consequence of GDB's type management; PCC and GCC (at
1244 least through version 2.4) both output variables of
1245 either type char * or caddr_t with the type number
1246 defined in the 't' symbol for caddr_t. If a future
1247 compiler cleans this up it GDB is not ready for it
1248 yet, but if it becomes ready we somehow need to
1249 disable this check (without breaking the PCC/GCC2.4
1254 Fortunately, this check seems not to be necessary
1255 for anything except pointers or functions. */
1256 /* ezannoni: 2000-10-26. This seems to apply for
1257 versions of gcc older than 2.8. This was the original
1258 problem: with the following code gdb would tell that
1259 the type for name1 is caddr_t, and func is char().
1261 typedef char *caddr_t;
1273 /* Pascal accepts names for pointer types. */
1274 if (current_subfile->language == language_pascal)
1276 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1280 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1283 add_symbol_to_list (sym, &file_symbols);
1287 /* Create the STRUCT_DOMAIN clone. */
1288 struct symbol *struct_sym = (struct symbol *)
1289 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
1292 SYMBOL_CLASS (struct_sym) = LOC_TYPEDEF;
1293 SYMBOL_VALUE (struct_sym) = valu;
1294 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1295 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1296 TYPE_NAME (SYMBOL_TYPE (sym))
1297 = obconcat (&objfile->objfile_obstack,
1298 SYMBOL_LINKAGE_NAME (sym),
1300 add_symbol_to_list (struct_sym, &file_symbols);
1306 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1307 by 't' which means we are typedef'ing it as well. */
1308 synonym = *p == 't';
1313 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1315 /* For a nameless type, we don't want a create a symbol, thus we
1316 did not use `sym'. Return without further processing. */
1320 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1321 SYMBOL_VALUE (sym) = valu;
1322 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1323 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1324 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1325 = obconcat (&objfile->objfile_obstack,
1326 SYMBOL_LINKAGE_NAME (sym),
1328 add_symbol_to_list (sym, &file_symbols);
1332 /* Clone the sym and then modify it. */
1333 struct symbol *typedef_sym = (struct symbol *)
1334 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
1336 *typedef_sym = *sym;
1337 SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF;
1338 SYMBOL_VALUE (typedef_sym) = valu;
1339 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1340 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1341 TYPE_NAME (SYMBOL_TYPE (sym))
1342 = obconcat (&objfile->objfile_obstack,
1343 SYMBOL_LINKAGE_NAME (sym),
1345 add_symbol_to_list (typedef_sym, &file_symbols);
1350 /* Static symbol of local scope. */
1351 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1352 SYMBOL_CLASS (sym) = LOC_STATIC;
1353 SYMBOL_VALUE_ADDRESS (sym) = valu;
1354 if (gdbarch_static_transform_name_p (gdbarch)
1355 && gdbarch_static_transform_name (gdbarch,
1356 SYMBOL_LINKAGE_NAME (sym))
1357 != SYMBOL_LINKAGE_NAME (sym))
1359 struct minimal_symbol *msym;
1361 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1365 char *new_name = gdbarch_static_transform_name
1366 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1368 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1369 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1372 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1373 add_symbol_to_list (sym, &local_symbols);
1377 /* Reference parameter */
1378 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1379 SYMBOL_CLASS (sym) = LOC_REF_ARG;
1380 SYMBOL_IS_ARGUMENT (sym) = 1;
1381 SYMBOL_VALUE (sym) = valu;
1382 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1383 add_symbol_to_list (sym, &local_symbols);
1387 /* Reference parameter which is in a register. */
1388 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1389 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
1390 SYMBOL_REGISTER_OPS (sym) = &stab_register_funcs;
1391 SYMBOL_IS_ARGUMENT (sym) = 1;
1392 SYMBOL_VALUE (sym) = valu;
1393 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1394 add_symbol_to_list (sym, &local_symbols);
1398 /* This is used by Sun FORTRAN for "function result value".
1399 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1400 that Pascal uses it too, but when I tried it Pascal used
1401 "x:3" (local symbol) instead. */
1402 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1403 SYMBOL_CLASS (sym) = LOC_LOCAL;
1404 SYMBOL_VALUE (sym) = valu;
1405 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1406 add_symbol_to_list (sym, &local_symbols);
1410 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1411 SYMBOL_CLASS (sym) = LOC_CONST;
1412 SYMBOL_VALUE (sym) = 0;
1413 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1414 add_symbol_to_list (sym, &file_symbols);
1418 /* Some systems pass variables of certain types by reference instead
1419 of by value, i.e. they will pass the address of a structure (in a
1420 register or on the stack) instead of the structure itself. */
1422 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1423 && SYMBOL_IS_ARGUMENT (sym))
1425 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1426 variables passed in a register). */
1427 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1428 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
1429 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1430 and subsequent arguments on SPARC, for example). */
1431 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1432 SYMBOL_CLASS (sym) = LOC_REF_ARG;
1438 /* Skip rest of this symbol and return an error type.
1440 General notes on error recovery: error_type always skips to the
1441 end of the symbol (modulo cretinous dbx symbol name continuation).
1442 Thus code like this:
1444 if (*(*pp)++ != ';')
1445 return error_type (pp, objfile);
1447 is wrong because if *pp starts out pointing at '\0' (typically as the
1448 result of an earlier error), it will be incremented to point to the
1449 start of the next symbol, which might produce strange results, at least
1450 if you run off the end of the string table. Instead use
1453 return error_type (pp, objfile);
1459 foo = error_type (pp, objfile);
1463 And in case it isn't obvious, the point of all this hair is so the compiler
1464 can define new types and new syntaxes, and old versions of the
1465 debugger will be able to read the new symbol tables. */
1467 static struct type *
1468 error_type (char **pp, struct objfile *objfile)
1470 complaint (&symfile_complaints,
1471 _("couldn't parse type; debugger out of date?"));
1474 /* Skip to end of symbol. */
1475 while (**pp != '\0')
1480 /* Check for and handle cretinous dbx symbol name continuation! */
1481 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1483 *pp = next_symbol_text (objfile);
1490 return objfile_type (objfile)->builtin_error;
1494 /* Read type information or a type definition; return the type. Even
1495 though this routine accepts either type information or a type
1496 definition, the distinction is relevant--some parts of stabsread.c
1497 assume that type information starts with a digit, '-', or '(' in
1498 deciding whether to call read_type. */
1500 static struct type *
1501 read_type (char **pp, struct objfile *objfile)
1503 struct type *type = 0;
1506 char type_descriptor;
1508 /* Size in bits of type if specified by a type attribute, or -1 if
1509 there is no size attribute. */
1512 /* Used to distinguish string and bitstring from char-array and set. */
1515 /* Used to distinguish vector from array. */
1518 /* Read type number if present. The type number may be omitted.
1519 for instance in a two-dimensional array declared with type
1520 "ar1;1;10;ar1;1;10;4". */
1521 if ((**pp >= '0' && **pp <= '9')
1525 if (read_type_number (pp, typenums) != 0)
1526 return error_type (pp, objfile);
1530 /* Type is not being defined here. Either it already
1531 exists, or this is a forward reference to it.
1532 dbx_alloc_type handles both cases. */
1533 type = dbx_alloc_type (typenums, objfile);
1535 /* If this is a forward reference, arrange to complain if it
1536 doesn't get patched up by the time we're done
1538 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1539 add_undefined_type (type, typenums);
1544 /* Type is being defined here. */
1546 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1551 /* 'typenums=' not present, type is anonymous. Read and return
1552 the definition, but don't put it in the type vector. */
1553 typenums[0] = typenums[1] = -1;
1558 type_descriptor = (*pp)[-1];
1559 switch (type_descriptor)
1563 enum type_code code;
1565 /* Used to index through file_symbols. */
1566 struct pending *ppt;
1569 /* Name including "struct", etc. */
1573 char *from, *to, *p, *q1, *q2;
1575 /* Set the type code according to the following letter. */
1579 code = TYPE_CODE_STRUCT;
1582 code = TYPE_CODE_UNION;
1585 code = TYPE_CODE_ENUM;
1589 /* Complain and keep going, so compilers can invent new
1590 cross-reference types. */
1591 complaint (&symfile_complaints,
1592 _("Unrecognized cross-reference type `%c'"),
1594 code = TYPE_CODE_STRUCT;
1599 q1 = strchr (*pp, '<');
1600 p = strchr (*pp, ':');
1602 return error_type (pp, objfile);
1603 if (q1 && p > q1 && p[1] == ':')
1605 int nesting_level = 0;
1607 for (q2 = q1; *q2; q2++)
1611 else if (*q2 == '>')
1613 else if (*q2 == ':' && nesting_level == 0)
1618 return error_type (pp, objfile);
1621 if (current_subfile->language == language_cplus)
1623 char *new_name, *name = alloca (p - *pp + 1);
1625 memcpy (name, *pp, p - *pp);
1626 name[p - *pp] = '\0';
1627 new_name = cp_canonicalize_string (name);
1628 if (new_name != NULL)
1630 type_name = obsavestring (new_name, strlen (new_name),
1631 &objfile->objfile_obstack);
1635 if (type_name == NULL)
1637 to = type_name = (char *)
1638 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1640 /* Copy the name. */
1647 /* Set the pointer ahead of the name which we just read, and
1652 /* If this type has already been declared, then reuse the same
1653 type, rather than allocating a new one. This saves some
1656 for (ppt = file_symbols; ppt; ppt = ppt->next)
1657 for (i = 0; i < ppt->nsyms; i++)
1659 struct symbol *sym = ppt->symbol[i];
1661 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1662 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1663 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1664 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1666 obstack_free (&objfile->objfile_obstack, type_name);
1667 type = SYMBOL_TYPE (sym);
1668 if (typenums[0] != -1)
1669 *dbx_lookup_type (typenums, objfile) = type;
1674 /* Didn't find the type to which this refers, so we must
1675 be dealing with a forward reference. Allocate a type
1676 structure for it, and keep track of it so we can
1677 fill in the rest of the fields when we get the full
1679 type = dbx_alloc_type (typenums, objfile);
1680 TYPE_CODE (type) = code;
1681 TYPE_TAG_NAME (type) = type_name;
1682 INIT_CPLUS_SPECIFIC (type);
1683 TYPE_STUB (type) = 1;
1685 add_undefined_type (type, typenums);
1689 case '-': /* RS/6000 built-in type */
1703 /* We deal with something like t(1,2)=(3,4)=... which
1704 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1706 /* Allocate and enter the typedef type first.
1707 This handles recursive types. */
1708 type = dbx_alloc_type (typenums, objfile);
1709 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1711 struct type *xtype = read_type (pp, objfile);
1715 /* It's being defined as itself. That means it is "void". */
1716 TYPE_CODE (type) = TYPE_CODE_VOID;
1717 TYPE_LENGTH (type) = 1;
1719 else if (type_size >= 0 || is_string)
1721 /* This is the absolute wrong way to construct types. Every
1722 other debug format has found a way around this problem and
1723 the related problems with unnecessarily stubbed types;
1724 someone motivated should attempt to clean up the issue
1725 here as well. Once a type pointed to has been created it
1726 should not be modified.
1728 Well, it's not *absolutely* wrong. Constructing recursive
1729 types (trees, linked lists) necessarily entails modifying
1730 types after creating them. Constructing any loop structure
1731 entails side effects. The Dwarf 2 reader does handle this
1732 more gracefully (it never constructs more than once
1733 instance of a type object, so it doesn't have to copy type
1734 objects wholesale), but it still mutates type objects after
1735 other folks have references to them.
1737 Keep in mind that this circularity/mutation issue shows up
1738 at the source language level, too: C's "incomplete types",
1739 for example. So the proper cleanup, I think, would be to
1740 limit GDB's type smashing to match exactly those required
1741 by the source language. So GDB could have a
1742 "complete_this_type" function, but never create unnecessary
1743 copies of a type otherwise. */
1744 replace_type (type, xtype);
1745 TYPE_NAME (type) = NULL;
1746 TYPE_TAG_NAME (type) = NULL;
1750 TYPE_TARGET_STUB (type) = 1;
1751 TYPE_TARGET_TYPE (type) = xtype;
1756 /* In the following types, we must be sure to overwrite any existing
1757 type that the typenums refer to, rather than allocating a new one
1758 and making the typenums point to the new one. This is because there
1759 may already be pointers to the existing type (if it had been
1760 forward-referenced), and we must change it to a pointer, function,
1761 reference, or whatever, *in-place*. */
1763 case '*': /* Pointer to another type */
1764 type1 = read_type (pp, objfile);
1765 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1768 case '&': /* Reference to another type */
1769 type1 = read_type (pp, objfile);
1770 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
1773 case 'f': /* Function returning another type */
1774 type1 = read_type (pp, objfile);
1775 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1778 case 'g': /* Prototyped function. (Sun) */
1780 /* Unresolved questions:
1782 - According to Sun's ``STABS Interface Manual'', for 'f'
1783 and 'F' symbol descriptors, a `0' in the argument type list
1784 indicates a varargs function. But it doesn't say how 'g'
1785 type descriptors represent that info. Someone with access
1786 to Sun's toolchain should try it out.
1788 - According to the comment in define_symbol (search for
1789 `process_prototype_types:'), Sun emits integer arguments as
1790 types which ref themselves --- like `void' types. Do we
1791 have to deal with that here, too? Again, someone with
1792 access to Sun's toolchain should try it out and let us
1795 const char *type_start = (*pp) - 1;
1796 struct type *return_type = read_type (pp, objfile);
1797 struct type *func_type
1798 = make_function_type (return_type,
1799 dbx_lookup_type (typenums, objfile));
1802 struct type_list *next;
1806 while (**pp && **pp != '#')
1808 struct type *arg_type = read_type (pp, objfile);
1809 struct type_list *new = alloca (sizeof (*new));
1810 new->type = arg_type;
1811 new->next = arg_types;
1819 complaint (&symfile_complaints,
1820 _("Prototyped function type didn't "
1821 "end arguments with `#':\n%s"),
1825 /* If there is just one argument whose type is `void', then
1826 that's just an empty argument list. */
1828 && ! arg_types->next
1829 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1832 TYPE_FIELDS (func_type)
1833 = (struct field *) TYPE_ALLOC (func_type,
1834 num_args * sizeof (struct field));
1835 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1838 struct type_list *t;
1840 /* We stuck each argument type onto the front of the list
1841 when we read it, so the list is reversed. Build the
1842 fields array right-to-left. */
1843 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1844 TYPE_FIELD_TYPE (func_type, i) = t->type;
1846 TYPE_NFIELDS (func_type) = num_args;
1847 TYPE_PROTOTYPED (func_type) = 1;
1853 case 'k': /* Const qualifier on some type (Sun) */
1854 type = read_type (pp, objfile);
1855 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1856 dbx_lookup_type (typenums, objfile));
1859 case 'B': /* Volatile qual on some type (Sun) */
1860 type = read_type (pp, objfile);
1861 type = make_cv_type (TYPE_CONST (type), 1, type,
1862 dbx_lookup_type (typenums, objfile));
1866 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1867 { /* Member (class & variable) type */
1868 /* FIXME -- we should be doing smash_to_XXX types here. */
1870 struct type *domain = read_type (pp, objfile);
1871 struct type *memtype;
1874 /* Invalid member type data format. */
1875 return error_type (pp, objfile);
1878 memtype = read_type (pp, objfile);
1879 type = dbx_alloc_type (typenums, objfile);
1880 smash_to_memberptr_type (type, domain, memtype);
1883 /* type attribute */
1887 /* Skip to the semicolon. */
1888 while (**pp != ';' && **pp != '\0')
1891 return error_type (pp, objfile);
1893 ++ * pp; /* Skip the semicolon. */
1897 case 's': /* Size attribute */
1898 type_size = atoi (attr + 1);
1903 case 'S': /* String attribute */
1904 /* FIXME: check to see if following type is array? */
1908 case 'V': /* Vector attribute */
1909 /* FIXME: check to see if following type is array? */
1914 /* Ignore unrecognized type attributes, so future compilers
1915 can invent new ones. */
1923 case '#': /* Method (class & fn) type */
1924 if ((*pp)[0] == '#')
1926 /* We'll get the parameter types from the name. */
1927 struct type *return_type;
1930 return_type = read_type (pp, objfile);
1931 if (*(*pp)++ != ';')
1932 complaint (&symfile_complaints,
1933 _("invalid (minimal) member type "
1934 "data format at symtab pos %d."),
1936 type = allocate_stub_method (return_type);
1937 if (typenums[0] != -1)
1938 *dbx_lookup_type (typenums, objfile) = type;
1942 struct type *domain = read_type (pp, objfile);
1943 struct type *return_type;
1948 /* Invalid member type data format. */
1949 return error_type (pp, objfile);
1953 return_type = read_type (pp, objfile);
1954 args = read_args (pp, ';', objfile, &nargs, &varargs);
1956 return error_type (pp, objfile);
1957 type = dbx_alloc_type (typenums, objfile);
1958 smash_to_method_type (type, domain, return_type, args,
1963 case 'r': /* Range type */
1964 type = read_range_type (pp, typenums, type_size, objfile);
1965 if (typenums[0] != -1)
1966 *dbx_lookup_type (typenums, objfile) = type;
1971 /* Sun ACC builtin int type */
1972 type = read_sun_builtin_type (pp, typenums, objfile);
1973 if (typenums[0] != -1)
1974 *dbx_lookup_type (typenums, objfile) = type;
1978 case 'R': /* Sun ACC builtin float type */
1979 type = read_sun_floating_type (pp, typenums, objfile);
1980 if (typenums[0] != -1)
1981 *dbx_lookup_type (typenums, objfile) = type;
1984 case 'e': /* Enumeration type */
1985 type = dbx_alloc_type (typenums, objfile);
1986 type = read_enum_type (pp, type, objfile);
1987 if (typenums[0] != -1)
1988 *dbx_lookup_type (typenums, objfile) = type;
1991 case 's': /* Struct type */
1992 case 'u': /* Union type */
1994 enum type_code type_code = TYPE_CODE_UNDEF;
1995 type = dbx_alloc_type (typenums, objfile);
1996 switch (type_descriptor)
1999 type_code = TYPE_CODE_STRUCT;
2002 type_code = TYPE_CODE_UNION;
2005 type = read_struct_type (pp, type, type_code, objfile);
2009 case 'a': /* Array type */
2011 return error_type (pp, objfile);
2014 type = dbx_alloc_type (typenums, objfile);
2015 type = read_array_type (pp, type, objfile);
2017 TYPE_CODE (type) = TYPE_CODE_STRING;
2019 make_vector_type (type);
2022 case 'S': /* Set or bitstring type */
2023 type1 = read_type (pp, objfile);
2024 type = create_set_type ((struct type *) NULL, type1);
2026 TYPE_CODE (type) = TYPE_CODE_BITSTRING;
2027 if (typenums[0] != -1)
2028 *dbx_lookup_type (typenums, objfile) = type;
2032 --*pp; /* Go back to the symbol in error. */
2033 /* Particularly important if it was \0! */
2034 return error_type (pp, objfile);
2039 warning (_("GDB internal error, type is NULL in stabsread.c."));
2040 return error_type (pp, objfile);
2043 /* Size specified in a type attribute overrides any other size. */
2044 if (type_size != -1)
2045 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2050 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2051 Return the proper type node for a given builtin type number. */
2053 static const struct objfile_data *rs6000_builtin_type_data;
2055 static struct type *
2056 rs6000_builtin_type (int typenum, struct objfile *objfile)
2058 struct type **negative_types = objfile_data (objfile,
2059 rs6000_builtin_type_data);
2061 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2062 #define NUMBER_RECOGNIZED 34
2063 struct type *rettype = NULL;
2065 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2067 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
2068 return objfile_type (objfile)->builtin_error;
2071 if (!negative_types)
2073 /* This includes an empty slot for type number -0. */
2074 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2075 NUMBER_RECOGNIZED + 1, struct type *);
2076 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2079 if (negative_types[-typenum] != NULL)
2080 return negative_types[-typenum];
2082 #if TARGET_CHAR_BIT != 8
2083 #error This code wrong for TARGET_CHAR_BIT not 8
2084 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2085 that if that ever becomes not true, the correct fix will be to
2086 make the size in the struct type to be in bits, not in units of
2093 /* The size of this and all the other types are fixed, defined
2094 by the debugging format. If there is a type called "int" which
2095 is other than 32 bits, then it should use a new negative type
2096 number (or avoid negative type numbers for that case).
2097 See stabs.texinfo. */
2098 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", objfile);
2101 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", objfile);
2104 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", objfile);
2107 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", objfile);
2110 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
2111 "unsigned char", objfile);
2114 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", objfile);
2117 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
2118 "unsigned short", objfile);
2121 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2122 "unsigned int", objfile);
2125 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2126 "unsigned", objfile);
2129 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2130 "unsigned long", objfile);
2133 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", objfile);
2136 /* IEEE single precision (32 bit). */
2137 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", objfile);
2140 /* IEEE double precision (64 bit). */
2141 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", objfile);
2144 /* This is an IEEE double on the RS/6000, and different machines with
2145 different sizes for "long double" should use different negative
2146 type numbers. See stabs.texinfo. */
2147 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", objfile);
2150 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", objfile);
2153 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2154 "boolean", objfile);
2157 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", objfile);
2160 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", objfile);
2163 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", objfile);
2166 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2167 "character", objfile);
2170 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2171 "logical*1", objfile);
2174 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2175 "logical*2", objfile);
2178 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2179 "logical*4", objfile);
2182 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2183 "logical", objfile);
2186 /* Complex type consisting of two IEEE single precision values. */
2187 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", objfile);
2188 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2192 /* Complex type consisting of two IEEE double precision values. */
2193 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2194 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2198 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", objfile);
2201 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", objfile);
2204 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", objfile);
2207 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", objfile);
2210 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", objfile);
2213 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2214 "unsigned long long", objfile);
2217 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2218 "logical*8", objfile);
2221 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", objfile);
2224 negative_types[-typenum] = rettype;
2228 /* This page contains subroutines of read_type. */
2230 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2233 update_method_name_from_physname (char **old_name, char *physname)
2237 method_name = method_name_from_physname (physname);
2239 if (method_name == NULL)
2241 complaint (&symfile_complaints,
2242 _("Method has bad physname %s\n"), physname);
2246 if (strcmp (*old_name, method_name) != 0)
2249 *old_name = method_name;
2252 xfree (method_name);
2255 /* Read member function stabs info for C++ classes. The form of each member
2258 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2260 An example with two member functions is:
2262 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2264 For the case of overloaded operators, the format is op$::*.funcs, where
2265 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2266 name (such as `+=') and `.' marks the end of the operator name.
2268 Returns 1 for success, 0 for failure. */
2271 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2272 struct objfile *objfile)
2276 /* Total number of member functions defined in this class. If the class
2277 defines two `f' functions, and one `g' function, then this will have
2279 int total_length = 0;
2283 struct next_fnfield *next;
2284 struct fn_field fn_field;
2287 struct type *look_ahead_type;
2288 struct next_fnfieldlist *new_fnlist;
2289 struct next_fnfield *new_sublist;
2293 /* Process each list until we find something that is not a member function
2294 or find the end of the functions. */
2298 /* We should be positioned at the start of the function name.
2299 Scan forward to find the first ':' and if it is not the
2300 first of a "::" delimiter, then this is not a member function. */
2312 look_ahead_type = NULL;
2315 new_fnlist = (struct next_fnfieldlist *)
2316 xmalloc (sizeof (struct next_fnfieldlist));
2317 make_cleanup (xfree, new_fnlist);
2318 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
2320 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2322 /* This is a completely wierd case. In order to stuff in the
2323 names that might contain colons (the usual name delimiter),
2324 Mike Tiemann defined a different name format which is
2325 signalled if the identifier is "op$". In that case, the
2326 format is "op$::XXXX." where XXXX is the name. This is
2327 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2328 /* This lets the user type "break operator+".
2329 We could just put in "+" as the name, but that wouldn't
2331 static char opname[32] = "op$";
2332 char *o = opname + 3;
2334 /* Skip past '::'. */
2337 STABS_CONTINUE (pp, objfile);
2343 main_fn_name = savestring (opname, o - opname);
2349 main_fn_name = savestring (*pp, p - *pp);
2350 /* Skip past '::'. */
2353 new_fnlist->fn_fieldlist.name = main_fn_name;
2358 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
2359 make_cleanup (xfree, new_sublist);
2360 memset (new_sublist, 0, sizeof (struct next_fnfield));
2362 /* Check for and handle cretinous dbx symbol name continuation! */
2363 if (look_ahead_type == NULL)
2366 STABS_CONTINUE (pp, objfile);
2368 new_sublist->fn_field.type = read_type (pp, objfile);
2371 /* Invalid symtab info for member function. */
2377 /* g++ version 1 kludge */
2378 new_sublist->fn_field.type = look_ahead_type;
2379 look_ahead_type = NULL;
2389 /* If this is just a stub, then we don't have the real name here. */
2391 if (TYPE_STUB (new_sublist->fn_field.type))
2393 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
2394 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
2395 new_sublist->fn_field.is_stub = 1;
2397 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2400 /* Set this member function's visibility fields. */
2403 case VISIBILITY_PRIVATE:
2404 new_sublist->fn_field.is_private = 1;
2406 case VISIBILITY_PROTECTED:
2407 new_sublist->fn_field.is_protected = 1;
2411 STABS_CONTINUE (pp, objfile);
2414 case 'A': /* Normal functions. */
2415 new_sublist->fn_field.is_const = 0;
2416 new_sublist->fn_field.is_volatile = 0;
2419 case 'B': /* `const' member functions. */
2420 new_sublist->fn_field.is_const = 1;
2421 new_sublist->fn_field.is_volatile = 0;
2424 case 'C': /* `volatile' member function. */
2425 new_sublist->fn_field.is_const = 0;
2426 new_sublist->fn_field.is_volatile = 1;
2429 case 'D': /* `const volatile' member function. */
2430 new_sublist->fn_field.is_const = 1;
2431 new_sublist->fn_field.is_volatile = 1;
2434 case '*': /* File compiled with g++ version 1 --
2440 complaint (&symfile_complaints,
2441 _("const/volatile indicator missing, got '%c'"),
2451 /* virtual member function, followed by index.
2452 The sign bit is set to distinguish pointers-to-methods
2453 from virtual function indicies. Since the array is
2454 in words, the quantity must be shifted left by 1
2455 on 16 bit machine, and by 2 on 32 bit machine, forcing
2456 the sign bit out, and usable as a valid index into
2457 the array. Remove the sign bit here. */
2458 new_sublist->fn_field.voffset =
2459 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2463 STABS_CONTINUE (pp, objfile);
2464 if (**pp == ';' || **pp == '\0')
2466 /* Must be g++ version 1. */
2467 new_sublist->fn_field.fcontext = 0;
2471 /* Figure out from whence this virtual function came.
2472 It may belong to virtual function table of
2473 one of its baseclasses. */
2474 look_ahead_type = read_type (pp, objfile);
2477 /* g++ version 1 overloaded methods. */
2481 new_sublist->fn_field.fcontext = look_ahead_type;
2490 look_ahead_type = NULL;
2496 /* static member function. */
2498 int slen = strlen (main_fn_name);
2500 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2502 /* For static member functions, we can't tell if they
2503 are stubbed, as they are put out as functions, and not as
2505 GCC v2 emits the fully mangled name if
2506 dbxout.c:flag_minimal_debug is not set, so we have to
2507 detect a fully mangled physname here and set is_stub
2508 accordingly. Fully mangled physnames in v2 start with
2509 the member function name, followed by two underscores.
2510 GCC v3 currently always emits stubbed member functions,
2511 but with fully mangled physnames, which start with _Z. */
2512 if (!(strncmp (new_sublist->fn_field.physname,
2513 main_fn_name, slen) == 0
2514 && new_sublist->fn_field.physname[slen] == '_'
2515 && new_sublist->fn_field.physname[slen + 1] == '_'))
2517 new_sublist->fn_field.is_stub = 1;
2524 complaint (&symfile_complaints,
2525 _("member function type missing, got '%c'"),
2527 /* Fall through into normal member function. */
2530 /* normal member function. */
2531 new_sublist->fn_field.voffset = 0;
2532 new_sublist->fn_field.fcontext = 0;
2536 new_sublist->next = sublist;
2537 sublist = new_sublist;
2539 STABS_CONTINUE (pp, objfile);
2541 while (**pp != ';' && **pp != '\0');
2544 STABS_CONTINUE (pp, objfile);
2546 /* Skip GCC 3.X member functions which are duplicates of the callable
2547 constructor/destructor. */
2548 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2549 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2550 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2552 xfree (main_fn_name);
2557 int has_destructor = 0, has_other = 0;
2559 struct next_fnfield *tmp_sublist;
2561 /* Various versions of GCC emit various mostly-useless
2562 strings in the name field for special member functions.
2564 For stub methods, we need to defer correcting the name
2565 until we are ready to unstub the method, because the current
2566 name string is used by gdb_mangle_name. The only stub methods
2567 of concern here are GNU v2 operators; other methods have their
2568 names correct (see caveat below).
2570 For non-stub methods, in GNU v3, we have a complete physname.
2571 Therefore we can safely correct the name now. This primarily
2572 affects constructors and destructors, whose name will be
2573 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2574 operators will also have incorrect names; for instance,
2575 "operator int" will be named "operator i" (i.e. the type is
2578 For non-stub methods in GNU v2, we have no easy way to
2579 know if we have a complete physname or not. For most
2580 methods the result depends on the platform (if CPLUS_MARKER
2581 can be `$' or `.', it will use minimal debug information, or
2582 otherwise the full physname will be included).
2584 Rather than dealing with this, we take a different approach.
2585 For v3 mangled names, we can use the full physname; for v2,
2586 we use cplus_demangle_opname (which is actually v2 specific),
2587 because the only interesting names are all operators - once again
2588 barring the caveat below. Skip this process if any method in the
2589 group is a stub, to prevent our fouling up the workings of
2592 The caveat: GCC 2.95.x (and earlier?) put constructors and
2593 destructors in the same method group. We need to split this
2594 into two groups, because they should have different names.
2595 So for each method group we check whether it contains both
2596 routines whose physname appears to be a destructor (the physnames
2597 for and destructors are always provided, due to quirks in v2
2598 mangling) and routines whose physname does not appear to be a
2599 destructor. If so then we break up the list into two halves.
2600 Even if the constructors and destructors aren't in the same group
2601 the destructor will still lack the leading tilde, so that also
2604 So, to summarize what we expect and handle here:
2606 Given Given Real Real Action
2607 method name physname physname method name
2609 __opi [none] __opi__3Foo operator int opname
2611 Foo _._3Foo _._3Foo ~Foo separate and
2613 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2614 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2617 tmp_sublist = sublist;
2618 while (tmp_sublist != NULL)
2620 if (tmp_sublist->fn_field.is_stub)
2622 if (tmp_sublist->fn_field.physname[0] == '_'
2623 && tmp_sublist->fn_field.physname[1] == 'Z')
2626 if (is_destructor_name (tmp_sublist->fn_field.physname))
2631 tmp_sublist = tmp_sublist->next;
2634 if (has_destructor && has_other)
2636 struct next_fnfieldlist *destr_fnlist;
2637 struct next_fnfield *last_sublist;
2639 /* Create a new fn_fieldlist for the destructors. */
2641 destr_fnlist = (struct next_fnfieldlist *)
2642 xmalloc (sizeof (struct next_fnfieldlist));
2643 make_cleanup (xfree, destr_fnlist);
2644 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
2645 destr_fnlist->fn_fieldlist.name
2646 = obconcat (&objfile->objfile_obstack, "~",
2647 new_fnlist->fn_fieldlist.name, (char *) NULL);
2649 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2650 obstack_alloc (&objfile->objfile_obstack,
2651 sizeof (struct fn_field) * has_destructor);
2652 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2653 sizeof (struct fn_field) * has_destructor);
2654 tmp_sublist = sublist;
2655 last_sublist = NULL;
2657 while (tmp_sublist != NULL)
2659 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2661 tmp_sublist = tmp_sublist->next;
2665 destr_fnlist->fn_fieldlist.fn_fields[i++]
2666 = tmp_sublist->fn_field;
2668 last_sublist->next = tmp_sublist->next;
2670 sublist = tmp_sublist->next;
2671 last_sublist = tmp_sublist;
2672 tmp_sublist = tmp_sublist->next;
2675 destr_fnlist->fn_fieldlist.length = has_destructor;
2676 destr_fnlist->next = fip->fnlist;
2677 fip->fnlist = destr_fnlist;
2679 total_length += has_destructor;
2680 length -= has_destructor;
2684 /* v3 mangling prevents the use of abbreviated physnames,
2685 so we can do this here. There are stubbed methods in v3
2687 - in -gstabs instead of -gstabs+
2688 - or for static methods, which are output as a function type
2689 instead of a method type. */
2691 update_method_name_from_physname (&new_fnlist->fn_fieldlist.name,
2692 sublist->fn_field.physname);
2694 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2696 new_fnlist->fn_fieldlist.name =
2697 concat ("~", main_fn_name, (char *)NULL);
2698 xfree (main_fn_name);
2702 char dem_opname[256];
2705 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2706 dem_opname, DMGL_ANSI);
2708 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2711 new_fnlist->fn_fieldlist.name
2712 = obsavestring (dem_opname, strlen (dem_opname),
2713 &objfile->objfile_obstack);
2716 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2717 obstack_alloc (&objfile->objfile_obstack,
2718 sizeof (struct fn_field) * length);
2719 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2720 sizeof (struct fn_field) * length);
2721 for (i = length; (i--, sublist); sublist = sublist->next)
2723 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2726 new_fnlist->fn_fieldlist.length = length;
2727 new_fnlist->next = fip->fnlist;
2728 fip->fnlist = new_fnlist;
2730 total_length += length;
2736 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2737 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2738 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2739 memset (TYPE_FN_FIELDLISTS (type), 0,
2740 sizeof (struct fn_fieldlist) * nfn_fields);
2741 TYPE_NFN_FIELDS (type) = nfn_fields;
2742 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
2748 /* Special GNU C++ name.
2750 Returns 1 for success, 0 for failure. "failure" means that we can't
2751 keep parsing and it's time for error_type(). */
2754 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2755 struct objfile *objfile)
2760 struct type *context;
2770 /* At this point, *pp points to something like "22:23=*22...",
2771 where the type number before the ':' is the "context" and
2772 everything after is a regular type definition. Lookup the
2773 type, find it's name, and construct the field name. */
2775 context = read_type (pp, objfile);
2779 case 'f': /* $vf -- a virtual function table pointer */
2780 name = type_name_no_tag (context);
2785 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2786 vptr_name, name, (char *) NULL);
2789 case 'b': /* $vb -- a virtual bsomethingorother */
2790 name = type_name_no_tag (context);
2793 complaint (&symfile_complaints,
2794 _("C++ abbreviated type name "
2795 "unknown at symtab pos %d"),
2799 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2800 name, (char *) NULL);
2804 invalid_cpp_abbrev_complaint (*pp);
2805 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2806 "INVALID_CPLUSPLUS_ABBREV",
2811 /* At this point, *pp points to the ':'. Skip it and read the
2817 invalid_cpp_abbrev_complaint (*pp);
2820 fip->list->field.type = read_type (pp, objfile);
2822 (*pp)++; /* Skip the comma. */
2829 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ';', &nbits,
2834 /* This field is unpacked. */
2835 FIELD_BITSIZE (fip->list->field) = 0;
2836 fip->list->visibility = VISIBILITY_PRIVATE;
2840 invalid_cpp_abbrev_complaint (*pp);
2841 /* We have no idea what syntax an unrecognized abbrev would have, so
2842 better return 0. If we returned 1, we would need to at least advance
2843 *pp to avoid an infinite loop. */
2850 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2851 struct type *type, struct objfile *objfile)
2853 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2855 fip->list->field.name =
2856 obsavestring (*pp, p - *pp, &objfile->objfile_obstack);
2859 /* This means we have a visibility for a field coming. */
2863 fip->list->visibility = *(*pp)++;
2867 /* normal dbx-style format, no explicit visibility */
2868 fip->list->visibility = VISIBILITY_PUBLIC;
2871 fip->list->field.type = read_type (pp, objfile);
2876 /* Possible future hook for nested types. */
2879 fip->list->field.bitpos = (long) -2; /* nested type */
2889 /* Static class member. */
2890 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2894 else if (**pp != ',')
2896 /* Bad structure-type format. */
2897 stabs_general_complaint ("bad structure-type format");
2901 (*pp)++; /* Skip the comma. */
2906 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ',', &nbits, 0);
2909 stabs_general_complaint ("bad structure-type format");
2912 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2915 stabs_general_complaint ("bad structure-type format");
2920 if (FIELD_BITPOS (fip->list->field) == 0
2921 && FIELD_BITSIZE (fip->list->field) == 0)
2923 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2924 it is a field which has been optimized out. The correct stab for
2925 this case is to use VISIBILITY_IGNORE, but that is a recent
2926 invention. (2) It is a 0-size array. For example
2927 union { int num; char str[0]; } foo. Printing _("<no value>" for
2928 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2929 will continue to work, and a 0-size array as a whole doesn't
2930 have any contents to print.
2932 I suspect this probably could also happen with gcc -gstabs (not
2933 -gstabs+) for static fields, and perhaps other C++ extensions.
2934 Hopefully few people use -gstabs with gdb, since it is intended
2935 for dbx compatibility. */
2937 /* Ignore this field. */
2938 fip->list->visibility = VISIBILITY_IGNORE;
2942 /* Detect an unpacked field and mark it as such.
2943 dbx gives a bit size for all fields.
2944 Note that forward refs cannot be packed,
2945 and treat enums as if they had the width of ints. */
2947 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2949 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2950 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2951 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2952 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2954 FIELD_BITSIZE (fip->list->field) = 0;
2956 if ((FIELD_BITSIZE (fip->list->field)
2957 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2958 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2959 && FIELD_BITSIZE (fip->list->field)
2960 == gdbarch_int_bit (gdbarch))
2963 FIELD_BITPOS (fip->list->field) % 8 == 0)
2965 FIELD_BITSIZE (fip->list->field) = 0;
2971 /* Read struct or class data fields. They have the form:
2973 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2975 At the end, we see a semicolon instead of a field.
2977 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2980 The optional VISIBILITY is one of:
2982 '/0' (VISIBILITY_PRIVATE)
2983 '/1' (VISIBILITY_PROTECTED)
2984 '/2' (VISIBILITY_PUBLIC)
2985 '/9' (VISIBILITY_IGNORE)
2987 or nothing, for C style fields with public visibility.
2989 Returns 1 for success, 0 for failure. */
2992 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
2993 struct objfile *objfile)
2996 struct nextfield *new;
2998 /* We better set p right now, in case there are no fields at all... */
3002 /* Read each data member type until we find the terminating ';' at the end of
3003 the data member list, or break for some other reason such as finding the
3004 start of the member function list. */
3005 /* Stab string for structure/union does not end with two ';' in
3006 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3008 while (**pp != ';' && **pp != '\0')
3010 STABS_CONTINUE (pp, objfile);
3011 /* Get space to record the next field's data. */
3012 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3013 make_cleanup (xfree, new);
3014 memset (new, 0, sizeof (struct nextfield));
3015 new->next = fip->list;
3018 /* Get the field name. */
3021 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3022 unless the CPLUS_MARKER is followed by an underscore, in
3023 which case it is just the name of an anonymous type, which we
3024 should handle like any other type name. */
3026 if (is_cplus_marker (p[0]) && p[1] != '_')
3028 if (!read_cpp_abbrev (fip, pp, type, objfile))
3033 /* Look for the ':' that separates the field name from the field
3034 values. Data members are delimited by a single ':', while member
3035 functions are delimited by a pair of ':'s. When we hit the member
3036 functions (if any), terminate scan loop and return. */
3038 while (*p != ':' && *p != '\0')
3045 /* Check to see if we have hit the member functions yet. */
3050 read_one_struct_field (fip, pp, p, type, objfile);
3052 if (p[0] == ':' && p[1] == ':')
3054 /* (the deleted) chill the list of fields: the last entry (at
3055 the head) is a partially constructed entry which we now
3057 fip->list = fip->list->next;
3062 /* The stabs for C++ derived classes contain baseclass information which
3063 is marked by a '!' character after the total size. This function is
3064 called when we encounter the baseclass marker, and slurps up all the
3065 baseclass information.
3067 Immediately following the '!' marker is the number of base classes that
3068 the class is derived from, followed by information for each base class.
3069 For each base class, there are two visibility specifiers, a bit offset
3070 to the base class information within the derived class, a reference to
3071 the type for the base class, and a terminating semicolon.
3073 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3075 Baseclass information marker __________________|| | | | | | |
3076 Number of baseclasses __________________________| | | | | | |
3077 Visibility specifiers (2) ________________________| | | | | |
3078 Offset in bits from start of class _________________| | | | |
3079 Type number for base class ___________________________| | | |
3080 Visibility specifiers (2) _______________________________| | |
3081 Offset in bits from start of class ________________________| |
3082 Type number of base class ____________________________________|
3084 Return 1 for success, 0 for (error-type-inducing) failure. */
3090 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3091 struct objfile *objfile)
3094 struct nextfield *new;
3102 /* Skip the '!' baseclass information marker. */
3106 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3110 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3116 /* Some stupid compilers have trouble with the following, so break
3117 it up into simpler expressions. */
3118 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3119 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3122 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3125 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3126 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3130 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3132 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3134 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3135 make_cleanup (xfree, new);
3136 memset (new, 0, sizeof (struct nextfield));
3137 new->next = fip->list;
3139 FIELD_BITSIZE (new->field) = 0; /* This should be an unpacked
3142 STABS_CONTINUE (pp, objfile);
3146 /* Nothing to do. */
3149 SET_TYPE_FIELD_VIRTUAL (type, i);
3152 /* Unknown character. Complain and treat it as non-virtual. */
3154 complaint (&symfile_complaints,
3155 _("Unknown virtual character `%c' for baseclass"),
3161 new->visibility = *(*pp)++;
3162 switch (new->visibility)
3164 case VISIBILITY_PRIVATE:
3165 case VISIBILITY_PROTECTED:
3166 case VISIBILITY_PUBLIC:
3169 /* Bad visibility format. Complain and treat it as
3172 complaint (&symfile_complaints,
3173 _("Unknown visibility `%c' for baseclass"),
3175 new->visibility = VISIBILITY_PUBLIC;
3182 /* The remaining value is the bit offset of the portion of the object
3183 corresponding to this baseclass. Always zero in the absence of
3184 multiple inheritance. */
3186 FIELD_BITPOS (new->field) = read_huge_number (pp, ',', &nbits, 0);
3191 /* The last piece of baseclass information is the type of the
3192 base class. Read it, and remember it's type name as this
3195 new->field.type = read_type (pp, objfile);
3196 new->field.name = type_name_no_tag (new->field.type);
3198 /* Skip trailing ';' and bump count of number of fields seen. */
3207 /* The tail end of stabs for C++ classes that contain a virtual function
3208 pointer contains a tilde, a %, and a type number.
3209 The type number refers to the base class (possibly this class itself) which
3210 contains the vtable pointer for the current class.
3212 This function is called when we have parsed all the method declarations,
3213 so we can look for the vptr base class info. */
3216 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3217 struct objfile *objfile)
3221 STABS_CONTINUE (pp, objfile);
3223 /* If we are positioned at a ';', then skip it. */
3233 if (**pp == '=' || **pp == '+' || **pp == '-')
3235 /* Obsolete flags that used to indicate the presence
3236 of constructors and/or destructors. */
3240 /* Read either a '%' or the final ';'. */
3241 if (*(*pp)++ == '%')
3243 /* The next number is the type number of the base class
3244 (possibly our own class) which supplies the vtable for
3245 this class. Parse it out, and search that class to find
3246 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3247 and TYPE_VPTR_FIELDNO. */
3252 t = read_type (pp, objfile);
3254 while (*p != '\0' && *p != ';')
3260 /* Premature end of symbol. */
3264 TYPE_VPTR_BASETYPE (type) = t;
3265 if (type == t) /* Our own class provides vtbl ptr. */
3267 for (i = TYPE_NFIELDS (t) - 1;
3268 i >= TYPE_N_BASECLASSES (t);
3271 char *name = TYPE_FIELD_NAME (t, i);
3273 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3274 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3276 TYPE_VPTR_FIELDNO (type) = i;
3280 /* Virtual function table field not found. */
3281 complaint (&symfile_complaints,
3282 _("virtual function table pointer "
3283 "not found when defining class `%s'"),
3289 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
3300 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3304 for (n = TYPE_NFN_FIELDS (type);
3305 fip->fnlist != NULL;
3306 fip->fnlist = fip->fnlist->next)
3308 --n; /* Circumvent Sun3 compiler bug. */
3309 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3314 /* Create the vector of fields, and record how big it is.
3315 We need this info to record proper virtual function table information
3316 for this class's virtual functions. */
3319 attach_fields_to_type (struct field_info *fip, struct type *type,
3320 struct objfile *objfile)
3323 int non_public_fields = 0;
3324 struct nextfield *scan;
3326 /* Count up the number of fields that we have, as well as taking note of
3327 whether or not there are any non-public fields, which requires us to
3328 allocate and build the private_field_bits and protected_field_bits
3331 for (scan = fip->list; scan != NULL; scan = scan->next)
3334 if (scan->visibility != VISIBILITY_PUBLIC)
3336 non_public_fields++;
3340 /* Now we know how many fields there are, and whether or not there are any
3341 non-public fields. Record the field count, allocate space for the
3342 array of fields, and create blank visibility bitfields if necessary. */
3344 TYPE_NFIELDS (type) = nfields;
3345 TYPE_FIELDS (type) = (struct field *)
3346 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3347 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3349 if (non_public_fields)
3351 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3353 TYPE_FIELD_PRIVATE_BITS (type) =
3354 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3355 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3357 TYPE_FIELD_PROTECTED_BITS (type) =
3358 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3359 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3361 TYPE_FIELD_IGNORE_BITS (type) =
3362 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3363 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3366 /* Copy the saved-up fields into the field vector. Start from the
3367 head of the list, adding to the tail of the field array, so that
3368 they end up in the same order in the array in which they were
3369 added to the list. */
3371 while (nfields-- > 0)
3373 TYPE_FIELD (type, nfields) = fip->list->field;
3374 switch (fip->list->visibility)
3376 case VISIBILITY_PRIVATE:
3377 SET_TYPE_FIELD_PRIVATE (type, nfields);
3380 case VISIBILITY_PROTECTED:
3381 SET_TYPE_FIELD_PROTECTED (type, nfields);
3384 case VISIBILITY_IGNORE:
3385 SET_TYPE_FIELD_IGNORE (type, nfields);
3388 case VISIBILITY_PUBLIC:
3392 /* Unknown visibility. Complain and treat it as public. */
3394 complaint (&symfile_complaints,
3395 _("Unknown visibility `%c' for field"),
3396 fip->list->visibility);
3400 fip->list = fip->list->next;
3406 /* Complain that the compiler has emitted more than one definition for the
3407 structure type TYPE. */
3409 complain_about_struct_wipeout (struct type *type)
3414 if (TYPE_TAG_NAME (type))
3416 name = TYPE_TAG_NAME (type);
3417 switch (TYPE_CODE (type))
3419 case TYPE_CODE_STRUCT: kind = "struct "; break;
3420 case TYPE_CODE_UNION: kind = "union "; break;
3421 case TYPE_CODE_ENUM: kind = "enum "; break;
3425 else if (TYPE_NAME (type))
3427 name = TYPE_NAME (type);
3436 complaint (&symfile_complaints,
3437 _("struct/union type gets multiply defined: %s%s"), kind, name);
3440 /* Set the length for all variants of a same main_type, which are
3441 connected in the closed chain.
3443 This is something that needs to be done when a type is defined *after*
3444 some cross references to this type have already been read. Consider
3445 for instance the following scenario where we have the following two
3448 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3449 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3451 A stubbed version of type dummy is created while processing the first
3452 stabs entry. The length of that type is initially set to zero, since
3453 it is unknown at this point. Also, a "constant" variation of type
3454 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3457 The second stabs entry allows us to replace the stubbed definition
3458 with the real definition. However, we still need to adjust the length
3459 of the "constant" variation of that type, as its length was left
3460 untouched during the main type replacement... */
3463 set_length_in_type_chain (struct type *type)
3465 struct type *ntype = TYPE_CHAIN (type);
3467 while (ntype != type)
3469 if (TYPE_LENGTH(ntype) == 0)
3470 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3472 complain_about_struct_wipeout (ntype);
3473 ntype = TYPE_CHAIN (ntype);
3477 /* Read the description of a structure (or union type) and return an object
3478 describing the type.
3480 PP points to a character pointer that points to the next unconsumed token
3481 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3482 *PP will point to "4a:1,0,32;;".
3484 TYPE points to an incomplete type that needs to be filled in.
3486 OBJFILE points to the current objfile from which the stabs information is
3487 being read. (Note that it is redundant in that TYPE also contains a pointer
3488 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3491 static struct type *
3492 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3493 struct objfile *objfile)
3495 struct cleanup *back_to;
3496 struct field_info fi;
3501 /* When describing struct/union/class types in stabs, G++ always drops
3502 all qualifications from the name. So if you've got:
3503 struct A { ... struct B { ... }; ... };
3504 then G++ will emit stabs for `struct A::B' that call it simply
3505 `struct B'. Obviously, if you've got a real top-level definition for
3506 `struct B', or other nested definitions, this is going to cause
3509 Obviously, GDB can't fix this by itself, but it can at least avoid
3510 scribbling on existing structure type objects when new definitions
3512 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3513 || TYPE_STUB (type)))
3515 complain_about_struct_wipeout (type);
3517 /* It's probably best to return the type unchanged. */
3521 back_to = make_cleanup (null_cleanup, 0);
3523 INIT_CPLUS_SPECIFIC (type);
3524 TYPE_CODE (type) = type_code;
3525 TYPE_STUB (type) = 0;
3527 /* First comes the total size in bytes. */
3532 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3534 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_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 = obsavestring (*pp, p - *pp, &objfile->objfile_obstack);
3676 n = read_huge_number (pp, ',', &nbits, 0);
3678 return error_type (pp, objfile);
3680 sym = (struct symbol *)
3681 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
3682 memset (sym, 0, sizeof (struct symbol));
3683 SYMBOL_SET_LINKAGE_NAME (sym, name);
3684 SYMBOL_SET_LANGUAGE (sym, current_subfile->language);
3685 SYMBOL_CLASS (sym) = LOC_CONST;
3686 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3687 SYMBOL_VALUE (sym) = n;
3690 add_symbol_to_list (sym, symlist);
3695 (*pp)++; /* Skip the semicolon. */
3697 /* Now fill in the fields of the type-structure. */
3699 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3700 set_length_in_type_chain (type);
3701 TYPE_CODE (type) = TYPE_CODE_ENUM;
3702 TYPE_STUB (type) = 0;
3704 TYPE_UNSIGNED (type) = 1;
3705 TYPE_NFIELDS (type) = nsyms;
3706 TYPE_FIELDS (type) = (struct field *)
3707 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3708 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3710 /* Find the symbols for the values and put them into the type.
3711 The symbols can be found in the symlist that we put them on
3712 to cause them to be defined. osyms contains the old value
3713 of that symlist; everything up to there was defined by us. */
3714 /* Note that we preserve the order of the enum constants, so
3715 that in something like "enum {FOO, LAST_THING=FOO}" we print
3716 FOO, not LAST_THING. */
3718 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3720 int last = syms == osyms ? o_nsyms : 0;
3721 int j = syms->nsyms;
3723 for (; --j >= last; --n)
3725 struct symbol *xsym = syms->symbol[j];
3727 SYMBOL_TYPE (xsym) = type;
3728 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3729 TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
3730 TYPE_FIELD_BITSIZE (type, n) = 0;
3739 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3740 typedefs in every file (for int, long, etc):
3742 type = b <signed> <width> <format type>; <offset>; <nbits>
3744 optional format type = c or b for char or boolean.
3745 offset = offset from high order bit to start bit of type.
3746 width is # bytes in object of this type, nbits is # bits in type.
3748 The width/offset stuff appears to be for small objects stored in
3749 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3752 static struct type *
3753 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3758 enum type_code code = TYPE_CODE_INT;
3769 return error_type (pp, objfile);
3773 /* For some odd reason, all forms of char put a c here. This is strange
3774 because no other type has this honor. We can safely ignore this because
3775 we actually determine 'char'acterness by the number of bits specified in
3777 Boolean forms, e.g Fortran logical*X, put a b here. */
3781 else if (**pp == 'b')
3783 code = TYPE_CODE_BOOL;
3787 /* The first number appears to be the number of bytes occupied
3788 by this type, except that unsigned short is 4 instead of 2.
3789 Since this information is redundant with the third number,
3790 we will ignore it. */
3791 read_huge_number (pp, ';', &nbits, 0);
3793 return error_type (pp, objfile);
3795 /* The second number is always 0, so ignore it too. */
3796 read_huge_number (pp, ';', &nbits, 0);
3798 return error_type (pp, objfile);
3800 /* The third number is the number of bits for this type. */
3801 type_bits = read_huge_number (pp, 0, &nbits, 0);
3803 return error_type (pp, objfile);
3804 /* The type *should* end with a semicolon. If it are embedded
3805 in a larger type the semicolon may be the only way to know where
3806 the type ends. If this type is at the end of the stabstring we
3807 can deal with the omitted semicolon (but we don't have to like
3808 it). Don't bother to complain(), Sun's compiler omits the semicolon
3814 return init_type (TYPE_CODE_VOID, 1,
3815 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3818 return init_type (code,
3819 type_bits / TARGET_CHAR_BIT,
3820 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3824 static struct type *
3825 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3830 struct type *rettype;
3832 /* The first number has more details about the type, for example
3834 details = read_huge_number (pp, ';', &nbits, 0);
3836 return error_type (pp, objfile);
3838 /* The second number is the number of bytes occupied by this type. */
3839 nbytes = read_huge_number (pp, ';', &nbits, 0);
3841 return error_type (pp, objfile);
3843 if (details == NF_COMPLEX || details == NF_COMPLEX16
3844 || details == NF_COMPLEX32)
3846 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
3847 TYPE_TARGET_TYPE (rettype)
3848 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
3852 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
3855 /* Read a number from the string pointed to by *PP.
3856 The value of *PP is advanced over the number.
3857 If END is nonzero, the character that ends the
3858 number must match END, or an error happens;
3859 and that character is skipped if it does match.
3860 If END is zero, *PP is left pointing to that character.
3862 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3863 the number is represented in an octal representation, assume that
3864 it is represented in a 2's complement representation with a size of
3865 TWOS_COMPLEMENT_BITS.
3867 If the number fits in a long, set *BITS to 0 and return the value.
3868 If not, set *BITS to be the number of bits in the number and return 0.
3870 If encounter garbage, set *BITS to -1 and return 0. */
3873 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3884 int twos_complement_representation = 0;
3892 /* Leading zero means octal. GCC uses this to output values larger
3893 than an int (because that would be hard in decimal). */
3900 /* Skip extra zeros. */
3904 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3906 /* Octal, possibly signed. Check if we have enough chars for a
3912 while ((c = *p1) >= '0' && c < '8')
3916 if (len > twos_complement_bits / 3
3917 || (twos_complement_bits % 3 == 0
3918 && len == twos_complement_bits / 3))
3920 /* Ok, we have enough characters for a signed value, check
3921 for signness by testing if the sign bit is set. */
3922 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3924 if (c & (1 << sign_bit))
3926 /* Definitely signed. */
3927 twos_complement_representation = 1;
3933 upper_limit = LONG_MAX / radix;
3935 while ((c = *p++) >= '0' && c < ('0' + radix))
3937 if (n <= upper_limit)
3939 if (twos_complement_representation)
3941 /* Octal, signed, twos complement representation. In
3942 this case, n is the corresponding absolute value. */
3945 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3957 /* unsigned representation */
3959 n += c - '0'; /* FIXME this overflows anyway. */
3965 /* This depends on large values being output in octal, which is
3972 /* Ignore leading zeroes. */
3976 else if (c == '2' || c == '3')
3997 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
3999 /* We were supposed to parse a number with maximum
4000 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4011 /* Large decimal constants are an error (because it is hard to
4012 count how many bits are in them). */
4018 /* -0x7f is the same as 0x80. So deal with it by adding one to
4019 the number of bits. Two's complement represention octals
4020 can't have a '-' in front. */
4021 if (sign == -1 && !twos_complement_representation)
4032 /* It's *BITS which has the interesting information. */
4036 static struct type *
4037 read_range_type (char **pp, int typenums[2], int type_size,
4038 struct objfile *objfile)
4040 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4041 char *orig_pp = *pp;
4046 struct type *result_type;
4047 struct type *index_type = NULL;
4049 /* First comes a type we are a subrange of.
4050 In C it is usually 0, 1 or the type being defined. */
4051 if (read_type_number (pp, rangenums) != 0)
4052 return error_type (pp, objfile);
4053 self_subrange = (rangenums[0] == typenums[0] &&
4054 rangenums[1] == typenums[1]);
4059 index_type = read_type (pp, objfile);
4062 /* A semicolon should now follow; skip it. */
4066 /* The remaining two operands are usually lower and upper bounds
4067 of the range. But in some special cases they mean something else. */
4068 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4069 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4071 if (n2bits == -1 || n3bits == -1)
4072 return error_type (pp, objfile);
4075 goto handle_true_range;
4077 /* If limits are huge, must be large integral type. */
4078 if (n2bits != 0 || n3bits != 0)
4080 char got_signed = 0;
4081 char got_unsigned = 0;
4082 /* Number of bits in the type. */
4085 /* If a type size attribute has been specified, the bounds of
4086 the range should fit in this size. If the lower bounds needs
4087 more bits than the upper bound, then the type is signed. */
4088 if (n2bits <= type_size && n3bits <= type_size)
4090 if (n2bits == type_size && n2bits > n3bits)
4096 /* Range from 0 to <large number> is an unsigned large integral type. */
4097 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4102 /* Range from <large number> to <large number>-1 is a large signed
4103 integral type. Take care of the case where <large number> doesn't
4104 fit in a long but <large number>-1 does. */
4105 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4106 || (n2bits != 0 && n3bits == 0
4107 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4114 if (got_signed || got_unsigned)
4116 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
4117 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
4121 return error_type (pp, objfile);
4124 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4125 if (self_subrange && n2 == 0 && n3 == 0)
4126 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4128 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4129 is the width in bytes.
4131 Fortran programs appear to use this for complex types also. To
4132 distinguish between floats and complex, g77 (and others?) seem
4133 to use self-subranges for the complexes, and subranges of int for
4136 Also note that for complexes, g77 sets n2 to the size of one of
4137 the member floats, not the whole complex beast. My guess is that
4138 this was to work well with pre-COMPLEX versions of gdb. */
4140 if (n3 == 0 && n2 > 0)
4142 struct type *float_type
4143 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
4147 struct type *complex_type =
4148 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
4150 TYPE_TARGET_TYPE (complex_type) = float_type;
4151 return complex_type;
4157 /* If the upper bound is -1, it must really be an unsigned integral. */
4159 else if (n2 == 0 && n3 == -1)
4161 int bits = type_size;
4165 /* We don't know its size. It is unsigned int or unsigned
4166 long. GCC 2.3.3 uses this for long long too, but that is
4167 just a GDB 3.5 compatibility hack. */
4168 bits = gdbarch_int_bit (gdbarch);
4171 return init_type (TYPE_CODE_INT, bits / TARGET_CHAR_BIT,
4172 TYPE_FLAG_UNSIGNED, NULL, objfile);
4175 /* Special case: char is defined (Who knows why) as a subrange of
4176 itself with range 0-127. */
4177 else if (self_subrange && n2 == 0 && n3 == 127)
4178 return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile);
4180 /* We used to do this only for subrange of self or subrange of int. */
4183 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4184 "unsigned long", and we already checked for that,
4185 so don't need to test for it here. */
4188 /* n3 actually gives the size. */
4189 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
4192 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4193 unsigned n-byte integer. But do require n to be a power of
4194 two; we don't want 3- and 5-byte integers flying around. */
4200 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4203 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4204 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4208 /* I think this is for Convex "long long". Since I don't know whether
4209 Convex sets self_subrange, I also accept that particular size regardless
4210 of self_subrange. */
4211 else if (n3 == 0 && n2 < 0
4213 || n2 == -gdbarch_long_long_bit
4214 (gdbarch) / TARGET_CHAR_BIT))
4215 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4216 else if (n2 == -n3 - 1)
4219 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4221 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4222 if (n3 == 0x7fffffff)
4223 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4226 /* We have a real range type on our hands. Allocate space and
4227 return a real pointer. */
4231 index_type = objfile_type (objfile)->builtin_int;
4233 index_type = *dbx_lookup_type (rangenums, objfile);
4234 if (index_type == NULL)
4236 /* Does this actually ever happen? Is that why we are worrying
4237 about dealing with it rather than just calling error_type? */
4239 complaint (&symfile_complaints,
4240 _("base type %d of range type is not defined"), rangenums[1]);
4242 index_type = objfile_type (objfile)->builtin_int;
4245 result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
4246 return (result_type);
4249 /* Read in an argument list. This is a list of types, separated by commas
4250 and terminated with END. Return the list of types read in, or NULL
4251 if there is an error. */
4253 static struct field *
4254 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4257 /* FIXME! Remove this arbitrary limit! */
4258 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4265 /* Invalid argument list: no ','. */
4268 STABS_CONTINUE (pp, objfile);
4269 types[n++] = read_type (pp, objfile);
4271 (*pp)++; /* get past `end' (the ':' character). */
4275 /* We should read at least the THIS parameter here. Some broken stabs
4276 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4277 have been present ";-16,(0,43)" reference instead. This way the
4278 excessive ";" marker prematurely stops the parameters parsing. */
4280 complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
4283 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4291 rval = (struct field *) xmalloc (n * sizeof (struct field));
4292 memset (rval, 0, n * sizeof (struct field));
4293 for (i = 0; i < n; i++)
4294 rval[i].type = types[i];
4299 /* Common block handling. */
4301 /* List of symbols declared since the last BCOMM. This list is a tail
4302 of local_symbols. When ECOMM is seen, the symbols on the list
4303 are noted so their proper addresses can be filled in later,
4304 using the common block base address gotten from the assembler
4307 static struct pending *common_block;
4308 static int common_block_i;
4310 /* Name of the current common block. We get it from the BCOMM instead of the
4311 ECOMM to match IBM documentation (even though IBM puts the name both places
4312 like everyone else). */
4313 static char *common_block_name;
4315 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4316 to remain after this function returns. */
4319 common_block_start (char *name, struct objfile *objfile)
4321 if (common_block_name != NULL)
4323 complaint (&symfile_complaints,
4324 _("Invalid symbol data: common block within common block"));
4326 common_block = local_symbols;
4327 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4328 common_block_name = obsavestring (name, strlen (name),
4329 &objfile->objfile_obstack);
4332 /* Process a N_ECOMM symbol. */
4335 common_block_end (struct objfile *objfile)
4337 /* Symbols declared since the BCOMM are to have the common block
4338 start address added in when we know it. common_block and
4339 common_block_i point to the first symbol after the BCOMM in
4340 the local_symbols list; copy the list and hang it off the
4341 symbol for the common block name for later fixup. */
4344 struct pending *new = 0;
4345 struct pending *next;
4348 if (common_block_name == NULL)
4350 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4354 sym = (struct symbol *)
4355 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
4356 memset (sym, 0, sizeof (struct symbol));
4357 /* Note: common_block_name already saved on objfile_obstack. */
4358 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4359 SYMBOL_CLASS (sym) = LOC_BLOCK;
4361 /* Now we copy all the symbols which have been defined since the BCOMM. */
4363 /* Copy all the struct pendings before common_block. */
4364 for (next = local_symbols;
4365 next != NULL && next != common_block;
4368 for (j = 0; j < next->nsyms; j++)
4369 add_symbol_to_list (next->symbol[j], &new);
4372 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4373 NULL, it means copy all the local symbols (which we already did
4376 if (common_block != NULL)
4377 for (j = common_block_i; j < common_block->nsyms; j++)
4378 add_symbol_to_list (common_block->symbol[j], &new);
4380 SYMBOL_TYPE (sym) = (struct type *) new;
4382 /* Should we be putting local_symbols back to what it was?
4385 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4386 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4387 global_sym_chain[i] = sym;
4388 common_block_name = NULL;
4391 /* Add a common block's start address to the offset of each symbol
4392 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4393 the common block name). */
4396 fix_common_block (struct symbol *sym, int valu)
4398 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4400 for (; next; next = next->next)
4404 for (j = next->nsyms - 1; j >= 0; j--)
4405 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4411 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4412 See add_undefined_type for more details. */
4415 add_undefined_type_noname (struct type *type, int typenums[2])
4419 nat.typenums[0] = typenums [0];
4420 nat.typenums[1] = typenums [1];
4423 if (noname_undefs_length == noname_undefs_allocated)
4425 noname_undefs_allocated *= 2;
4426 noname_undefs = (struct nat *)
4427 xrealloc ((char *) noname_undefs,
4428 noname_undefs_allocated * sizeof (struct nat));
4430 noname_undefs[noname_undefs_length++] = nat;
4433 /* Add TYPE to the UNDEF_TYPES vector.
4434 See add_undefined_type for more details. */
4437 add_undefined_type_1 (struct type *type)
4439 if (undef_types_length == undef_types_allocated)
4441 undef_types_allocated *= 2;
4442 undef_types = (struct type **)
4443 xrealloc ((char *) undef_types,
4444 undef_types_allocated * sizeof (struct type *));
4446 undef_types[undef_types_length++] = type;
4449 /* What about types defined as forward references inside of a small lexical
4451 /* Add a type to the list of undefined types to be checked through
4452 once this file has been read in.
4454 In practice, we actually maintain two such lists: The first list
4455 (UNDEF_TYPES) is used for types whose name has been provided, and
4456 concerns forward references (eg 'xs' or 'xu' forward references);
4457 the second list (NONAME_UNDEFS) is used for types whose name is
4458 unknown at creation time, because they were referenced through
4459 their type number before the actual type was declared.
4460 This function actually adds the given type to the proper list. */
4463 add_undefined_type (struct type *type, int typenums[2])
4465 if (TYPE_TAG_NAME (type) == NULL)
4466 add_undefined_type_noname (type, typenums);
4468 add_undefined_type_1 (type);
4471 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4474 cleanup_undefined_types_noname (struct objfile *objfile)
4478 for (i = 0; i < noname_undefs_length; i++)
4480 struct nat nat = noname_undefs[i];
4483 type = dbx_lookup_type (nat.typenums, objfile);
4484 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4486 /* The instance flags of the undefined type are still unset,
4487 and needs to be copied over from the reference type.
4488 Since replace_type expects them to be identical, we need
4489 to set these flags manually before hand. */
4490 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4491 replace_type (nat.type, *type);
4495 noname_undefs_length = 0;
4498 /* Go through each undefined type, see if it's still undefined, and fix it
4499 up if possible. We have two kinds of undefined types:
4501 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4502 Fix: update array length using the element bounds
4503 and the target type's length.
4504 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4505 yet defined at the time a pointer to it was made.
4506 Fix: Do a full lookup on the struct/union tag. */
4509 cleanup_undefined_types_1 (void)
4513 /* Iterate over every undefined type, and look for a symbol whose type
4514 matches our undefined type. The symbol matches if:
4515 1. It is a typedef in the STRUCT domain;
4516 2. It has the same name, and same type code;
4517 3. The instance flags are identical.
4519 It is important to check the instance flags, because we have seen
4520 examples where the debug info contained definitions such as:
4522 "foo_t:t30=B31=xefoo_t:"
4524 In this case, we have created an undefined type named "foo_t" whose
4525 instance flags is null (when processing "xefoo_t"), and then created
4526 another type with the same name, but with different instance flags
4527 ('B' means volatile). I think that the definition above is wrong,
4528 since the same type cannot be volatile and non-volatile at the same
4529 time, but we need to be able to cope with it when it happens. The
4530 approach taken here is to treat these two types as different. */
4532 for (type = undef_types; type < undef_types + undef_types_length; type++)
4534 switch (TYPE_CODE (*type))
4537 case TYPE_CODE_STRUCT:
4538 case TYPE_CODE_UNION:
4539 case TYPE_CODE_ENUM:
4541 /* Check if it has been defined since. Need to do this here
4542 as well as in check_typedef to deal with the (legitimate in
4543 C though not C++) case of several types with the same name
4544 in different source files. */
4545 if (TYPE_STUB (*type))
4547 struct pending *ppt;
4549 /* Name of the type, without "struct" or "union". */
4550 char *typename = TYPE_TAG_NAME (*type);
4552 if (typename == NULL)
4554 complaint (&symfile_complaints, _("need a type name"));
4557 for (ppt = file_symbols; ppt; ppt = ppt->next)
4559 for (i = 0; i < ppt->nsyms; i++)
4561 struct symbol *sym = ppt->symbol[i];
4563 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4564 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4565 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4567 && (TYPE_INSTANCE_FLAGS (*type) ==
4568 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4569 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4571 replace_type (*type, SYMBOL_TYPE (sym));
4580 complaint (&symfile_complaints,
4581 _("forward-referenced types left unresolved, "
4589 undef_types_length = 0;
4592 /* Try to fix all the undefined types we ecountered while processing
4596 cleanup_undefined_types (struct objfile *objfile)
4598 cleanup_undefined_types_1 ();
4599 cleanup_undefined_types_noname (objfile);
4602 /* Scan through all of the global symbols defined in the object file,
4603 assigning values to the debugging symbols that need to be assigned
4604 to. Get these symbols from the minimal symbol table. */
4607 scan_file_globals (struct objfile *objfile)
4610 struct minimal_symbol *msymbol;
4611 struct symbol *sym, *prev;
4612 struct objfile *resolve_objfile;
4614 /* SVR4 based linkers copy referenced global symbols from shared
4615 libraries to the main executable.
4616 If we are scanning the symbols for a shared library, try to resolve
4617 them from the minimal symbols of the main executable first. */
4619 if (symfile_objfile && objfile != symfile_objfile)
4620 resolve_objfile = symfile_objfile;
4622 resolve_objfile = objfile;
4626 /* Avoid expensive loop through all minimal symbols if there are
4627 no unresolved symbols. */
4628 for (hash = 0; hash < HASHSIZE; hash++)
4630 if (global_sym_chain[hash])
4633 if (hash >= HASHSIZE)
4636 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4640 /* Skip static symbols. */
4641 switch (MSYMBOL_TYPE (msymbol))
4653 /* Get the hash index and check all the symbols
4654 under that hash index. */
4656 hash = hashname (SYMBOL_LINKAGE_NAME (msymbol));
4658 for (sym = global_sym_chain[hash]; sym;)
4660 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol),
4661 SYMBOL_LINKAGE_NAME (sym)) == 0)
4663 /* Splice this symbol out of the hash chain and
4664 assign the value we have to it. */
4667 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4671 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4674 /* Check to see whether we need to fix up a common block. */
4675 /* Note: this code might be executed several times for
4676 the same symbol if there are multiple references. */
4679 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4681 fix_common_block (sym,
4682 SYMBOL_VALUE_ADDRESS (msymbol));
4686 SYMBOL_VALUE_ADDRESS (sym)
4687 = SYMBOL_VALUE_ADDRESS (msymbol);
4689 SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
4694 sym = SYMBOL_VALUE_CHAIN (prev);
4698 sym = global_sym_chain[hash];
4704 sym = SYMBOL_VALUE_CHAIN (sym);
4708 if (resolve_objfile == objfile)
4710 resolve_objfile = objfile;
4713 /* Change the storage class of any remaining unresolved globals to
4714 LOC_UNRESOLVED and remove them from the chain. */
4715 for (hash = 0; hash < HASHSIZE; hash++)
4717 sym = global_sym_chain[hash];
4721 sym = SYMBOL_VALUE_CHAIN (sym);
4723 /* Change the symbol address from the misleading chain value
4725 SYMBOL_VALUE_ADDRESS (prev) = 0;
4727 /* Complain about unresolved common block symbols. */
4728 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4729 SYMBOL_CLASS (prev) = LOC_UNRESOLVED;
4731 complaint (&symfile_complaints,
4732 _("%s: common block `%s' from "
4733 "global_sym_chain unresolved"),
4734 objfile->name, SYMBOL_PRINT_NAME (prev));
4737 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4740 /* Initialize anything that needs initializing when starting to read
4741 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4745 stabsread_init (void)
4749 /* Initialize anything that needs initializing when a completely new
4750 symbol file is specified (not just adding some symbols from another
4751 file, e.g. a shared library). */
4754 stabsread_new_init (void)
4756 /* Empty the hash table of global syms looking for values. */
4757 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4760 /* Initialize anything that needs initializing at the same time as
4761 start_symtab() is called. */
4766 global_stabs = NULL; /* AIX COFF */
4767 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4768 n_this_object_header_files = 1;
4769 type_vector_length = 0;
4770 type_vector = (struct type **) 0;
4772 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4773 common_block_name = NULL;
4776 /* Call after end_symtab(). */
4783 xfree (type_vector);
4786 type_vector_length = 0;
4787 previous_stab_code = 0;
4791 finish_global_stabs (struct objfile *objfile)
4795 patch_block_stabs (global_symbols, global_stabs, objfile);
4796 xfree (global_stabs);
4797 global_stabs = NULL;
4801 /* Find the end of the name, delimited by a ':', but don't match
4802 ObjC symbols which look like -[Foo bar::]:bla. */
4804 find_name_end (char *name)
4808 if (s[0] == '-' || *s == '+')
4810 /* Must be an ObjC method symbol. */
4813 error (_("invalid symbol name \"%s\""), name);
4815 s = strchr (s, ']');
4818 error (_("invalid symbol name \"%s\""), name);
4820 return strchr (s, ':');
4824 return strchr (s, ':');
4828 /* Initializer for this module. */
4831 _initialize_stabsread (void)
4833 rs6000_builtin_type_data = register_objfile_data ();
4835 undef_types_allocated = 20;
4836 undef_types_length = 0;
4837 undef_types = (struct type **)
4838 xmalloc (undef_types_allocated * sizeof (struct type *));
4840 noname_undefs_allocated = 20;
4841 noname_undefs_length = 0;
4842 noname_undefs = (struct nat *)
4843 xmalloc (noname_undefs_allocated * sizeof (struct nat));