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 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 (%d,%d) out of range at symtab pos %d."),
237 filenum, index, symnum);
245 /* Caller wants address of address of type. We think
246 that negative (rs6k builtin) types will never appear as
247 "lvalues", (nor should they), so we stuff the real type
248 pointer into a temp, and return its address. If referenced,
249 this will do the right thing. */
250 static struct type *temp_type;
252 temp_type = rs6000_builtin_type (index, objfile);
256 /* Type is defined outside of header files.
257 Find it in this object file's type vector. */
258 if (index >= type_vector_length)
260 old_len = type_vector_length;
263 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
264 type_vector = (struct type **)
265 xmalloc (type_vector_length * sizeof (struct type *));
267 while (index >= type_vector_length)
269 type_vector_length *= 2;
271 type_vector = (struct type **)
272 xrealloc ((char *) type_vector,
273 (type_vector_length * sizeof (struct type *)));
274 memset (&type_vector[old_len], 0,
275 (type_vector_length - old_len) * sizeof (struct type *));
277 return (&type_vector[index]);
281 real_filenum = this_object_header_files[filenum];
283 if (real_filenum >= N_HEADER_FILES (objfile))
285 static struct type *temp_type;
287 warning (_("GDB internal error: bad real_filenum"));
290 temp_type = objfile_type (objfile)->builtin_error;
294 f = HEADER_FILES (objfile) + real_filenum;
296 f_orig_length = f->length;
297 if (index >= f_orig_length)
299 while (index >= f->length)
303 f->vector = (struct type **)
304 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
305 memset (&f->vector[f_orig_length], 0,
306 (f->length - f_orig_length) * sizeof (struct type *));
308 return (&f->vector[index]);
312 /* Make sure there is a type allocated for type numbers TYPENUMS
313 and return the type object.
314 This can create an empty (zeroed) type object.
315 TYPENUMS may be (-1, -1) to return a new type object that is not
316 put into the type vector, and so may not be referred to by number. */
319 dbx_alloc_type (int typenums[2], struct objfile *objfile)
321 struct type **type_addr;
323 if (typenums[0] == -1)
325 return (alloc_type (objfile));
328 type_addr = dbx_lookup_type (typenums, objfile);
330 /* If we are referring to a type not known at all yet,
331 allocate an empty type for it.
332 We will fill it in later if we find out how. */
335 *type_addr = alloc_type (objfile);
341 /* for all the stabs in a given stab vector, build appropriate types
342 and fix their symbols in given symbol vector. */
345 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
346 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)
441 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
444 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
451 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
459 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
460 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
461 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
462 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
464 /* Structure for storing pointers to reference definitions for fast lookup
465 during "process_later". */
474 #define MAX_CHUNK_REFS 100
475 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
476 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
478 static struct ref_map *ref_map;
480 /* Ptr to free cell in chunk's linked list. */
481 static int ref_count = 0;
483 /* Number of chunks malloced. */
484 static int ref_chunk = 0;
486 /* This file maintains a cache of stabs aliases found in the symbol
487 table. If the symbol table changes, this cache must be cleared
488 or we are left holding onto data in invalid obstacks. */
490 stabsread_clear_cache (void)
496 /* Create array of pointers mapping refids to symbols and stab strings.
497 Add pointers to reference definition symbols and/or their values as we
498 find them, using their reference numbers as our index.
499 These will be used later when we resolve references. */
501 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
505 if (refnum >= ref_count)
506 ref_count = refnum + 1;
507 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
509 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
510 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
511 ref_map = (struct ref_map *)
512 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
513 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0, new_chunks * REF_CHUNK_SIZE);
514 ref_chunk += new_chunks;
516 ref_map[refnum].stabs = stabs;
517 ref_map[refnum].sym = sym;
518 ref_map[refnum].value = value;
521 /* Return defined sym for the reference REFNUM. */
523 ref_search (int refnum)
525 if (refnum < 0 || refnum > ref_count)
527 return ref_map[refnum].sym;
530 /* Parse a reference id in STRING and return the resulting
531 reference number. Move STRING beyond the reference id. */
534 process_reference (char **string)
542 /* Advance beyond the initial '#'. */
545 /* Read number as reference id. */
546 while (*p && isdigit (*p))
548 refnum = refnum * 10 + *p - '0';
555 /* If STRING defines a reference, store away a pointer to the reference
556 definition for later use. Return the reference number. */
559 symbol_reference_defined (char **string)
564 refnum = process_reference (&p);
566 /* Defining symbols end in '=' */
569 /* Symbol is being defined here. */
575 /* Must be a reference. Either the symbol has already been defined,
576 or this is a forward reference to it. */
583 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
585 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
587 if (regno >= gdbarch_num_regs (gdbarch)
588 + gdbarch_num_pseudo_regs (gdbarch))
590 reg_value_complaint (regno,
591 gdbarch_num_regs (gdbarch)
592 + gdbarch_num_pseudo_regs (gdbarch),
593 SYMBOL_PRINT_NAME (sym));
595 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless */
601 static const struct symbol_register_ops stab_register_funcs = {
606 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
607 struct objfile *objfile)
609 struct gdbarch *gdbarch = get_objfile_arch (objfile);
611 char *p = (char *) find_name_end (string);
615 char *new_name = NULL;
617 /* We would like to eliminate nameless symbols, but keep their types.
618 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
619 to type 2, but, should not create a symbol to address that type. Since
620 the symbol will be nameless, there is no way any user can refer to it. */
624 /* Ignore syms with empty names. */
628 /* Ignore old-style symbols from cc -go */
638 /* If a nameless stab entry, all we need is the type, not the symbol.
639 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
640 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
642 current_symbol = sym = (struct symbol *)
643 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
644 memset (sym, 0, sizeof (struct symbol));
646 switch (type & N_TYPE)
649 SYMBOL_SECTION (sym) = SECT_OFF_TEXT (objfile);
652 SYMBOL_SECTION (sym) = SECT_OFF_DATA (objfile);
655 SYMBOL_SECTION (sym) = SECT_OFF_BSS (objfile);
659 if (processing_gcc_compilation)
661 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
662 number of bytes occupied by a type or object, which we ignore. */
663 SYMBOL_LINE (sym) = desc;
667 SYMBOL_LINE (sym) = 0; /* unknown */
670 if (is_cplus_marker (string[0]))
672 /* Special GNU C++ names. */
676 SYMBOL_SET_LINKAGE_NAME (sym, "this");
679 case 'v': /* $vtbl_ptr_type */
683 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
687 /* This was an anonymous type that was never fixed up. */
691 /* SunPRO (3.0 at least) static variable encoding. */
692 if (gdbarch_static_transform_name_p (gdbarch))
694 /* ... fall through ... */
697 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
699 goto normal; /* Do *something* with it */
705 SYMBOL_LANGUAGE (sym) = current_subfile->language;
706 if (SYMBOL_LANGUAGE (sym) == language_cplus)
708 char *name = alloca (p - string + 1);
709 memcpy (name, string, p - string);
710 name[p - string] = '\0';
711 new_name = cp_canonicalize_string (name);
712 cp_scan_for_anonymous_namespaces (sym);
714 if (new_name != NULL)
716 SYMBOL_SET_NAMES (sym, new_name, strlen (new_name), 1, objfile);
720 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
724 /* Determine the type of name being defined. */
726 /* Getting GDB to correctly skip the symbol on an undefined symbol
727 descriptor and not ever dump core is a very dodgy proposition if
728 we do things this way. I say the acorn RISC machine can just
729 fix their compiler. */
730 /* The Acorn RISC machine's compiler can put out locals that don't
731 start with "234=" or "(3,4)=", so assume anything other than the
732 deftypes we know how to handle is a local. */
733 if (!strchr ("cfFGpPrStTvVXCR", *p))
735 if (isdigit (*p) || *p == '(' || *p == '-')
744 /* c is a special case, not followed by a type-number.
745 SYMBOL:c=iVALUE for an integer constant symbol.
746 SYMBOL:c=rVALUE for a floating constant symbol.
747 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
748 e.g. "b:c=e6,0" for "const b = blob1"
749 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
752 SYMBOL_CLASS (sym) = LOC_CONST;
753 SYMBOL_TYPE (sym) = error_type (&p, objfile);
754 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
755 add_symbol_to_list (sym, &file_symbols);
765 struct type *dbl_type;
767 /* FIXME-if-picky-about-floating-accuracy: Should be using
768 target arithmetic to get the value. real.c in GCC
769 probably has the necessary code. */
771 dbl_type = objfile_type (objfile)->builtin_double;
773 obstack_alloc (&objfile->objfile_obstack,
774 TYPE_LENGTH (dbl_type));
775 store_typed_floating (dbl_valu, dbl_type, d);
777 SYMBOL_TYPE (sym) = dbl_type;
778 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
779 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
784 /* Defining integer constants this way is kind of silly,
785 since 'e' constants allows the compiler to give not
786 only the value, but the type as well. C has at least
787 int, long, unsigned int, and long long as constant
788 types; other languages probably should have at least
789 unsigned as well as signed constants. */
791 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
792 SYMBOL_VALUE (sym) = atoi (p);
793 SYMBOL_CLASS (sym) = LOC_CONST;
799 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
800 SYMBOL_VALUE (sym) = atoi (p);
801 SYMBOL_CLASS (sym) = LOC_CONST;
807 struct type *range_type;
811 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
812 gdb_byte *string_value;
814 if (quote != '\'' && quote != '"')
816 SYMBOL_CLASS (sym) = LOC_CONST;
817 SYMBOL_TYPE (sym) = error_type (&p, objfile);
818 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
819 add_symbol_to_list (sym, &file_symbols);
823 /* Find matching quote, rejecting escaped quotes. */
824 while (*p && *p != quote)
826 if (*p == '\\' && p[1] == quote)
828 string_local[ind] = (gdb_byte) quote;
834 string_local[ind] = (gdb_byte) (*p);
841 SYMBOL_CLASS (sym) = LOC_CONST;
842 SYMBOL_TYPE (sym) = error_type (&p, objfile);
843 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
844 add_symbol_to_list (sym, &file_symbols);
848 /* NULL terminate the string. */
849 string_local[ind] = 0;
850 range_type = create_range_type (NULL,
851 objfile_type (objfile)->builtin_int,
853 SYMBOL_TYPE (sym) = create_array_type (NULL,
854 objfile_type (objfile)->builtin_char,
856 string_value = obstack_alloc (&objfile->objfile_obstack, ind + 1);
857 memcpy (string_value, string_local, ind + 1);
860 SYMBOL_VALUE_BYTES (sym) = string_value;
861 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
866 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
867 can be represented as integral.
868 e.g. "b:c=e6,0" for "const b = blob1"
869 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
871 SYMBOL_CLASS (sym) = LOC_CONST;
872 SYMBOL_TYPE (sym) = read_type (&p, objfile);
876 SYMBOL_TYPE (sym) = error_type (&p, objfile);
881 /* If the value is too big to fit in an int (perhaps because
882 it is unsigned), or something like that, we silently get
883 a bogus value. The type and everything else about it is
884 correct. Ideally, we should be using whatever we have
885 available for parsing unsigned and long long values,
887 SYMBOL_VALUE (sym) = atoi (p);
892 SYMBOL_CLASS (sym) = LOC_CONST;
893 SYMBOL_TYPE (sym) = error_type (&p, objfile);
896 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
897 add_symbol_to_list (sym, &file_symbols);
901 /* The name of a caught exception. */
902 SYMBOL_TYPE (sym) = read_type (&p, objfile);
903 SYMBOL_CLASS (sym) = LOC_LABEL;
904 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
905 SYMBOL_VALUE_ADDRESS (sym) = valu;
906 add_symbol_to_list (sym, &local_symbols);
910 /* A static function definition. */
911 SYMBOL_TYPE (sym) = read_type (&p, objfile);
912 SYMBOL_CLASS (sym) = LOC_BLOCK;
913 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
914 add_symbol_to_list (sym, &file_symbols);
915 /* fall into process_function_types. */
917 process_function_types:
918 /* Function result types are described as the result type in stabs.
919 We need to convert this to the function-returning-type-X type
920 in GDB. E.g. "int" is converted to "function returning int". */
921 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
922 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
924 /* All functions in C++ have prototypes. Stabs does not offer an
925 explicit way to identify prototyped or unprototyped functions,
926 but both GCC and Sun CC emit stabs for the "call-as" type rather
927 than the "declared-as" type for unprototyped functions, so
928 we treat all functions as if they were prototyped. This is used
929 primarily for promotion when calling the function from GDB. */
930 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
932 /* fall into process_prototype_types */
934 process_prototype_types:
935 /* Sun acc puts declared types of arguments here. */
938 struct type *ftype = SYMBOL_TYPE (sym);
943 /* Obtain a worst case guess for the number of arguments
944 by counting the semicolons. */
951 /* Allocate parameter information fields and fill them in. */
952 TYPE_FIELDS (ftype) = (struct field *)
953 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
958 /* A type number of zero indicates the start of varargs.
959 FIXME: GDB currently ignores vararg functions. */
960 if (p[0] == '0' && p[1] == '\0')
962 ptype = read_type (&p, objfile);
964 /* The Sun compilers mark integer arguments, which should
965 be promoted to the width of the calling conventions, with
966 a type which references itself. This type is turned into
967 a TYPE_CODE_VOID type by read_type, and we have to turn
968 it back into builtin_int here.
969 FIXME: Do we need a new builtin_promoted_int_arg ? */
970 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
971 ptype = objfile_type (objfile)->builtin_int;
972 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
973 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
975 TYPE_NFIELDS (ftype) = nparams;
976 TYPE_PROTOTYPED (ftype) = 1;
981 /* A global function definition. */
982 SYMBOL_TYPE (sym) = read_type (&p, objfile);
983 SYMBOL_CLASS (sym) = LOC_BLOCK;
984 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
985 add_symbol_to_list (sym, &global_symbols);
986 goto process_function_types;
989 /* For a class G (global) symbol, it appears that the
990 value is not correct. It is necessary to search for the
991 corresponding linker definition to find the value.
992 These definitions appear at the end of the namelist. */
993 SYMBOL_TYPE (sym) = read_type (&p, objfile);
994 SYMBOL_CLASS (sym) = LOC_STATIC;
995 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
996 /* Don't add symbol references to global_sym_chain.
997 Symbol references don't have valid names and wont't match up with
998 minimal symbols when the global_sym_chain is relocated.
999 We'll fixup symbol references when we fixup the defining symbol. */
1000 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1002 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1003 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1004 global_sym_chain[i] = sym;
1006 add_symbol_to_list (sym, &global_symbols);
1009 /* This case is faked by a conditional above,
1010 when there is no code letter in the dbx data.
1011 Dbx data never actually contains 'l'. */
1014 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1015 SYMBOL_CLASS (sym) = LOC_LOCAL;
1016 SYMBOL_VALUE (sym) = valu;
1017 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1018 add_symbol_to_list (sym, &local_symbols);
1023 /* pF is a two-letter code that means a function parameter in Fortran.
1024 The type-number specifies the type of the return value.
1025 Translate it into a pointer-to-function type. */
1029 = lookup_pointer_type
1030 (lookup_function_type (read_type (&p, objfile)));
1033 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1035 SYMBOL_CLASS (sym) = LOC_ARG;
1036 SYMBOL_VALUE (sym) = valu;
1037 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1038 SYMBOL_IS_ARGUMENT (sym) = 1;
1039 add_symbol_to_list (sym, &local_symbols);
1041 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1043 /* On little-endian machines, this crud is never necessary,
1044 and, if the extra bytes contain garbage, is harmful. */
1048 /* If it's gcc-compiled, if it says `short', believe it. */
1049 if (processing_gcc_compilation
1050 || gdbarch_believe_pcc_promotion (gdbarch))
1053 if (!gdbarch_believe_pcc_promotion (gdbarch))
1055 /* If PCC says a parameter is a short or a char, it is
1057 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1058 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1059 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1062 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1063 ? objfile_type (objfile)->builtin_unsigned_int
1064 : objfile_type (objfile)->builtin_int;
1070 /* acc seems to use P to declare the prototypes of functions that
1071 are referenced by this file. gdb is not prepared to deal
1072 with this extra information. FIXME, it ought to. */
1075 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1076 goto process_prototype_types;
1081 /* Parameter which is in a register. */
1082 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1083 SYMBOL_CLASS (sym) = LOC_REGISTER;
1084 SYMBOL_REGISTER_OPS (sym) = &stab_register_funcs;
1085 SYMBOL_IS_ARGUMENT (sym) = 1;
1086 SYMBOL_VALUE (sym) = valu;
1087 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1088 add_symbol_to_list (sym, &local_symbols);
1092 /* Register variable (either global or local). */
1093 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1094 SYMBOL_CLASS (sym) = LOC_REGISTER;
1095 SYMBOL_REGISTER_OPS (sym) = &stab_register_funcs;
1096 SYMBOL_VALUE (sym) = valu;
1097 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1098 if (within_function)
1100 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1101 the same name to represent an argument passed in a
1102 register. GCC uses 'P' for the same case. So if we find
1103 such a symbol pair we combine it into one 'P' symbol.
1104 For Sun cc we need to do this regardless of
1105 stabs_argument_has_addr, because the compiler puts out
1106 the 'p' symbol even if it never saves the argument onto
1109 On most machines, we want to preserve both symbols, so
1110 that we can still get information about what is going on
1111 with the stack (VAX for computing args_printed, using
1112 stack slots instead of saved registers in backtraces,
1115 Note that this code illegally combines
1116 main(argc) struct foo argc; { register struct foo argc; }
1117 but this case is considered pathological and causes a warning
1118 from a decent compiler. */
1121 && local_symbols->nsyms > 0
1122 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1124 struct symbol *prev_sym;
1125 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1126 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1127 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1128 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1129 SYMBOL_LINKAGE_NAME (sym)) == 0)
1131 SYMBOL_CLASS (prev_sym) = LOC_REGISTER;
1132 SYMBOL_REGISTER_OPS (prev_sym) = &stab_register_funcs;
1133 /* Use the type from the LOC_REGISTER; that is the type
1134 that is actually in that register. */
1135 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1136 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1141 add_symbol_to_list (sym, &local_symbols);
1144 add_symbol_to_list (sym, &file_symbols);
1148 /* Static symbol at top level of file */
1149 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1150 SYMBOL_CLASS (sym) = LOC_STATIC;
1151 SYMBOL_VALUE_ADDRESS (sym) = valu;
1152 if (gdbarch_static_transform_name_p (gdbarch)
1153 && gdbarch_static_transform_name (gdbarch,
1154 SYMBOL_LINKAGE_NAME (sym))
1155 != SYMBOL_LINKAGE_NAME (sym))
1157 struct minimal_symbol *msym;
1158 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, objfile);
1161 char *new_name = gdbarch_static_transform_name
1162 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1163 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1164 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1167 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1168 add_symbol_to_list (sym, &file_symbols);
1172 /* In Ada, there is no distinction between typedef and non-typedef;
1173 any type declaration implicitly has the equivalent of a typedef,
1174 and thus 't' is in fact equivalent to 'Tt'.
1176 Therefore, for Ada units, we check the character immediately
1177 before the 't', and if we do not find a 'T', then make sure to
1178 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1179 will be stored in the VAR_DOMAIN). If the symbol was indeed
1180 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1181 elsewhere, so we don't need to take care of that.
1183 This is important to do, because of forward references:
1184 The cleanup of undefined types stored in undef_types only uses
1185 STRUCT_DOMAIN symbols to perform the replacement. */
1186 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1189 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1191 /* For a nameless type, we don't want a create a symbol, thus we
1192 did not use `sym'. Return without further processing. */
1196 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1197 SYMBOL_VALUE (sym) = valu;
1198 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1199 /* C++ vagaries: we may have a type which is derived from
1200 a base type which did not have its name defined when the
1201 derived class was output. We fill in the derived class's
1202 base part member's name here in that case. */
1203 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1204 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1205 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1206 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1209 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1210 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1211 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1212 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1215 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1217 /* gcc-2.6 or later (when using -fvtable-thunks)
1218 emits a unique named type for a vtable entry.
1219 Some gdb code depends on that specific name. */
1220 extern const char vtbl_ptr_name[];
1222 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1223 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1224 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1226 /* If we are giving a name to a type such as "pointer to
1227 foo" or "function returning foo", we better not set
1228 the TYPE_NAME. If the program contains "typedef char
1229 *caddr_t;", we don't want all variables of type char
1230 * to print as caddr_t. This is not just a
1231 consequence of GDB's type management; PCC and GCC (at
1232 least through version 2.4) both output variables of
1233 either type char * or caddr_t with the type number
1234 defined in the 't' symbol for caddr_t. If a future
1235 compiler cleans this up it GDB is not ready for it
1236 yet, but if it becomes ready we somehow need to
1237 disable this check (without breaking the PCC/GCC2.4
1242 Fortunately, this check seems not to be necessary
1243 for anything except pointers or functions. */
1244 /* ezannoni: 2000-10-26. This seems to apply for
1245 versions of gcc older than 2.8. This was the original
1246 problem: with the following code gdb would tell that
1247 the type for name1 is caddr_t, and func is char()
1248 typedef char *caddr_t;
1260 /* Pascal accepts names for pointer types. */
1261 if (current_subfile->language == language_pascal)
1263 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1267 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1270 add_symbol_to_list (sym, &file_symbols);
1274 /* Create the STRUCT_DOMAIN clone. */
1275 struct symbol *struct_sym = (struct symbol *)
1276 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
1279 SYMBOL_CLASS (struct_sym) = LOC_TYPEDEF;
1280 SYMBOL_VALUE (struct_sym) = valu;
1281 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1282 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1283 TYPE_NAME (SYMBOL_TYPE (sym))
1284 = obconcat (&objfile->objfile_obstack, "", "",
1285 SYMBOL_LINKAGE_NAME (sym));
1286 add_symbol_to_list (struct_sym, &file_symbols);
1292 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1293 by 't' which means we are typedef'ing it as well. */
1294 synonym = *p == 't';
1299 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1301 /* For a nameless type, we don't want a create a symbol, thus we
1302 did not use `sym'. Return without further processing. */
1306 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1307 SYMBOL_VALUE (sym) = valu;
1308 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1309 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1310 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1311 = obconcat (&objfile->objfile_obstack, "", "",
1312 SYMBOL_LINKAGE_NAME (sym));
1313 add_symbol_to_list (sym, &file_symbols);
1317 /* Clone the sym and then modify it. */
1318 struct symbol *typedef_sym = (struct symbol *)
1319 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
1320 *typedef_sym = *sym;
1321 SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF;
1322 SYMBOL_VALUE (typedef_sym) = valu;
1323 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1324 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1325 TYPE_NAME (SYMBOL_TYPE (sym))
1326 = obconcat (&objfile->objfile_obstack, "", "",
1327 SYMBOL_LINKAGE_NAME (sym));
1328 add_symbol_to_list (typedef_sym, &file_symbols);
1333 /* Static symbol of local scope */
1334 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1335 SYMBOL_CLASS (sym) = LOC_STATIC;
1336 SYMBOL_VALUE_ADDRESS (sym) = valu;
1337 if (gdbarch_static_transform_name_p (gdbarch)
1338 && gdbarch_static_transform_name (gdbarch,
1339 SYMBOL_LINKAGE_NAME (sym))
1340 != SYMBOL_LINKAGE_NAME (sym))
1342 struct minimal_symbol *msym;
1343 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, objfile);
1346 char *new_name = gdbarch_static_transform_name
1347 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1348 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1349 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1352 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1353 add_symbol_to_list (sym, &local_symbols);
1357 /* Reference parameter */
1358 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1359 SYMBOL_CLASS (sym) = LOC_REF_ARG;
1360 SYMBOL_IS_ARGUMENT (sym) = 1;
1361 SYMBOL_VALUE (sym) = valu;
1362 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1363 add_symbol_to_list (sym, &local_symbols);
1367 /* Reference parameter which is in a register. */
1368 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1369 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
1370 SYMBOL_REGISTER_OPS (sym) = &stab_register_funcs;
1371 SYMBOL_IS_ARGUMENT (sym) = 1;
1372 SYMBOL_VALUE (sym) = valu;
1373 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1374 add_symbol_to_list (sym, &local_symbols);
1378 /* This is used by Sun FORTRAN for "function result value".
1379 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1380 that Pascal uses it too, but when I tried it Pascal used
1381 "x:3" (local symbol) instead. */
1382 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1383 SYMBOL_CLASS (sym) = LOC_LOCAL;
1384 SYMBOL_VALUE (sym) = valu;
1385 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1386 add_symbol_to_list (sym, &local_symbols);
1390 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1391 SYMBOL_CLASS (sym) = LOC_CONST;
1392 SYMBOL_VALUE (sym) = 0;
1393 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1394 add_symbol_to_list (sym, &file_symbols);
1398 /* Some systems pass variables of certain types by reference instead
1399 of by value, i.e. they will pass the address of a structure (in a
1400 register or on the stack) instead of the structure itself. */
1402 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1403 && SYMBOL_IS_ARGUMENT (sym))
1405 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1406 variables passed in a register). */
1407 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1408 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
1409 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1410 and subsequent arguments on SPARC, for example). */
1411 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1412 SYMBOL_CLASS (sym) = LOC_REF_ARG;
1418 /* Skip rest of this symbol and return an error type.
1420 General notes on error recovery: error_type always skips to the
1421 end of the symbol (modulo cretinous dbx symbol name continuation).
1422 Thus code like this:
1424 if (*(*pp)++ != ';')
1425 return error_type (pp, objfile);
1427 is wrong because if *pp starts out pointing at '\0' (typically as the
1428 result of an earlier error), it will be incremented to point to the
1429 start of the next symbol, which might produce strange results, at least
1430 if you run off the end of the string table. Instead use
1433 return error_type (pp, objfile);
1439 foo = error_type (pp, objfile);
1443 And in case it isn't obvious, the point of all this hair is so the compiler
1444 can define new types and new syntaxes, and old versions of the
1445 debugger will be able to read the new symbol tables. */
1447 static struct type *
1448 error_type (char **pp, struct objfile *objfile)
1450 complaint (&symfile_complaints, _("couldn't parse type; debugger out of date?"));
1453 /* Skip to end of symbol. */
1454 while (**pp != '\0')
1459 /* Check for and handle cretinous dbx symbol name continuation! */
1460 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1462 *pp = next_symbol_text (objfile);
1469 return objfile_type (objfile)->builtin_error;
1473 /* Read type information or a type definition; return the type. Even
1474 though this routine accepts either type information or a type
1475 definition, the distinction is relevant--some parts of stabsread.c
1476 assume that type information starts with a digit, '-', or '(' in
1477 deciding whether to call read_type. */
1479 static struct type *
1480 read_type (char **pp, struct objfile *objfile)
1482 struct type *type = 0;
1485 char type_descriptor;
1487 /* Size in bits of type if specified by a type attribute, or -1 if
1488 there is no size attribute. */
1491 /* Used to distinguish string and bitstring from char-array and set. */
1494 /* Used to distinguish vector from array. */
1497 /* Read type number if present. The type number may be omitted.
1498 for instance in a two-dimensional array declared with type
1499 "ar1;1;10;ar1;1;10;4". */
1500 if ((**pp >= '0' && **pp <= '9')
1504 if (read_type_number (pp, typenums) != 0)
1505 return error_type (pp, objfile);
1509 /* Type is not being defined here. Either it already
1510 exists, or this is a forward reference to it.
1511 dbx_alloc_type handles both cases. */
1512 type = dbx_alloc_type (typenums, objfile);
1514 /* If this is a forward reference, arrange to complain if it
1515 doesn't get patched up by the time we're done
1517 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1518 add_undefined_type (type, typenums);
1523 /* Type is being defined here. */
1525 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1530 /* 'typenums=' not present, type is anonymous. Read and return
1531 the definition, but don't put it in the type vector. */
1532 typenums[0] = typenums[1] = -1;
1537 type_descriptor = (*pp)[-1];
1538 switch (type_descriptor)
1542 enum type_code code;
1544 /* Used to index through file_symbols. */
1545 struct pending *ppt;
1548 /* Name including "struct", etc. */
1552 char *from, *to, *p, *q1, *q2;
1554 /* Set the type code according to the following letter. */
1558 code = TYPE_CODE_STRUCT;
1561 code = TYPE_CODE_UNION;
1564 code = TYPE_CODE_ENUM;
1568 /* Complain and keep going, so compilers can invent new
1569 cross-reference types. */
1570 complaint (&symfile_complaints,
1571 _("Unrecognized cross-reference type `%c'"), (*pp)[0]);
1572 code = TYPE_CODE_STRUCT;
1577 q1 = strchr (*pp, '<');
1578 p = strchr (*pp, ':');
1580 return error_type (pp, objfile);
1581 if (q1 && p > q1 && p[1] == ':')
1583 int nesting_level = 0;
1584 for (q2 = q1; *q2; q2++)
1588 else if (*q2 == '>')
1590 else if (*q2 == ':' && nesting_level == 0)
1595 return error_type (pp, objfile);
1598 if (current_subfile->language == language_cplus)
1600 char *new_name, *name = alloca (p - *pp + 1);
1601 memcpy (name, *pp, p - *pp);
1602 name[p - *pp] = '\0';
1603 new_name = cp_canonicalize_string (name);
1604 if (new_name != NULL)
1606 type_name = obsavestring (new_name, strlen (new_name),
1607 &objfile->objfile_obstack);
1611 if (type_name == NULL)
1614 (char *) obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1616 /* Copy the name. */
1623 /* Set the pointer ahead of the name which we just read, and
1628 /* If this type has already been declared, then reuse the same
1629 type, rather than allocating a new one. This saves some
1632 for (ppt = file_symbols; ppt; ppt = ppt->next)
1633 for (i = 0; i < ppt->nsyms; i++)
1635 struct symbol *sym = ppt->symbol[i];
1637 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1638 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1639 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1640 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1642 obstack_free (&objfile->objfile_obstack, type_name);
1643 type = SYMBOL_TYPE (sym);
1644 if (typenums[0] != -1)
1645 *dbx_lookup_type (typenums, objfile) = type;
1650 /* Didn't find the type to which this refers, so we must
1651 be dealing with a forward reference. Allocate a type
1652 structure for it, and keep track of it so we can
1653 fill in the rest of the fields when we get the full
1655 type = dbx_alloc_type (typenums, objfile);
1656 TYPE_CODE (type) = code;
1657 TYPE_TAG_NAME (type) = type_name;
1658 INIT_CPLUS_SPECIFIC (type);
1659 TYPE_STUB (type) = 1;
1661 add_undefined_type (type, typenums);
1665 case '-': /* RS/6000 built-in type */
1679 /* We deal with something like t(1,2)=(3,4)=... which
1680 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1682 /* Allocate and enter the typedef type first.
1683 This handles recursive types. */
1684 type = dbx_alloc_type (typenums, objfile);
1685 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1687 struct type *xtype = read_type (pp, objfile);
1690 /* It's being defined as itself. That means it is "void". */
1691 TYPE_CODE (type) = TYPE_CODE_VOID;
1692 TYPE_LENGTH (type) = 1;
1694 else if (type_size >= 0 || is_string)
1696 /* This is the absolute wrong way to construct types. Every
1697 other debug format has found a way around this problem and
1698 the related problems with unnecessarily stubbed types;
1699 someone motivated should attempt to clean up the issue
1700 here as well. Once a type pointed to has been created it
1701 should not be modified.
1703 Well, it's not *absolutely* wrong. Constructing recursive
1704 types (trees, linked lists) necessarily entails modifying
1705 types after creating them. Constructing any loop structure
1706 entails side effects. The Dwarf 2 reader does handle this
1707 more gracefully (it never constructs more than once
1708 instance of a type object, so it doesn't have to copy type
1709 objects wholesale), but it still mutates type objects after
1710 other folks have references to them.
1712 Keep in mind that this circularity/mutation issue shows up
1713 at the source language level, too: C's "incomplete types",
1714 for example. So the proper cleanup, I think, would be to
1715 limit GDB's type smashing to match exactly those required
1716 by the source language. So GDB could have a
1717 "complete_this_type" function, but never create unnecessary
1718 copies of a type otherwise. */
1719 replace_type (type, xtype);
1720 TYPE_NAME (type) = NULL;
1721 TYPE_TAG_NAME (type) = NULL;
1725 TYPE_TARGET_STUB (type) = 1;
1726 TYPE_TARGET_TYPE (type) = xtype;
1731 /* In the following types, we must be sure to overwrite any existing
1732 type that the typenums refer to, rather than allocating a new one
1733 and making the typenums point to the new one. This is because there
1734 may already be pointers to the existing type (if it had been
1735 forward-referenced), and we must change it to a pointer, function,
1736 reference, or whatever, *in-place*. */
1738 case '*': /* Pointer to another type */
1739 type1 = read_type (pp, objfile);
1740 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1743 case '&': /* Reference to another type */
1744 type1 = read_type (pp, objfile);
1745 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
1748 case 'f': /* Function returning another type */
1749 type1 = read_type (pp, objfile);
1750 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1753 case 'g': /* Prototyped function. (Sun) */
1755 /* Unresolved questions:
1757 - According to Sun's ``STABS Interface Manual'', for 'f'
1758 and 'F' symbol descriptors, a `0' in the argument type list
1759 indicates a varargs function. But it doesn't say how 'g'
1760 type descriptors represent that info. Someone with access
1761 to Sun's toolchain should try it out.
1763 - According to the comment in define_symbol (search for
1764 `process_prototype_types:'), Sun emits integer arguments as
1765 types which ref themselves --- like `void' types. Do we
1766 have to deal with that here, too? Again, someone with
1767 access to Sun's toolchain should try it out and let us
1770 const char *type_start = (*pp) - 1;
1771 struct type *return_type = read_type (pp, objfile);
1772 struct type *func_type
1773 = make_function_type (return_type,
1774 dbx_lookup_type (typenums, objfile));
1777 struct type_list *next;
1781 while (**pp && **pp != '#')
1783 struct type *arg_type = read_type (pp, objfile);
1784 struct type_list *new = alloca (sizeof (*new));
1785 new->type = arg_type;
1786 new->next = arg_types;
1794 complaint (&symfile_complaints,
1795 _("Prototyped function type didn't end arguments with `#':\n%s"),
1799 /* If there is just one argument whose type is `void', then
1800 that's just an empty argument list. */
1802 && ! arg_types->next
1803 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1806 TYPE_FIELDS (func_type)
1807 = (struct field *) TYPE_ALLOC (func_type,
1808 num_args * sizeof (struct field));
1809 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1812 struct type_list *t;
1814 /* We stuck each argument type onto the front of the list
1815 when we read it, so the list is reversed. Build the
1816 fields array right-to-left. */
1817 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1818 TYPE_FIELD_TYPE (func_type, i) = t->type;
1820 TYPE_NFIELDS (func_type) = num_args;
1821 TYPE_PROTOTYPED (func_type) = 1;
1827 case 'k': /* Const qualifier on some type (Sun) */
1828 type = read_type (pp, objfile);
1829 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1830 dbx_lookup_type (typenums, objfile));
1833 case 'B': /* Volatile qual on some type (Sun) */
1834 type = read_type (pp, objfile);
1835 type = make_cv_type (TYPE_CONST (type), 1, type,
1836 dbx_lookup_type (typenums, objfile));
1840 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1841 { /* Member (class & variable) type */
1842 /* FIXME -- we should be doing smash_to_XXX types here. */
1844 struct type *domain = read_type (pp, objfile);
1845 struct type *memtype;
1848 /* Invalid member type data format. */
1849 return error_type (pp, objfile);
1852 memtype = read_type (pp, objfile);
1853 type = dbx_alloc_type (typenums, objfile);
1854 smash_to_memberptr_type (type, domain, memtype);
1857 /* type attribute */
1860 /* Skip to the semicolon. */
1861 while (**pp != ';' && **pp != '\0')
1864 return error_type (pp, objfile);
1866 ++ * pp; /* Skip the semicolon. */
1870 case 's': /* Size attribute */
1871 type_size = atoi (attr + 1);
1876 case 'S': /* String attribute */
1877 /* FIXME: check to see if following type is array? */
1881 case 'V': /* Vector attribute */
1882 /* FIXME: check to see if following type is array? */
1887 /* Ignore unrecognized type attributes, so future compilers
1888 can invent new ones. */
1896 case '#': /* Method (class & fn) type */
1897 if ((*pp)[0] == '#')
1899 /* We'll get the parameter types from the name. */
1900 struct type *return_type;
1903 return_type = read_type (pp, objfile);
1904 if (*(*pp)++ != ';')
1905 complaint (&symfile_complaints,
1906 _("invalid (minimal) member type data format at symtab pos %d."),
1908 type = allocate_stub_method (return_type);
1909 if (typenums[0] != -1)
1910 *dbx_lookup_type (typenums, objfile) = type;
1914 struct type *domain = read_type (pp, objfile);
1915 struct type *return_type;
1920 /* Invalid member type data format. */
1921 return error_type (pp, objfile);
1925 return_type = read_type (pp, objfile);
1926 args = read_args (pp, ';', objfile, &nargs, &varargs);
1928 return error_type (pp, objfile);
1929 type = dbx_alloc_type (typenums, objfile);
1930 smash_to_method_type (type, domain, return_type, args,
1935 case 'r': /* Range type */
1936 type = read_range_type (pp, typenums, type_size, objfile);
1937 if (typenums[0] != -1)
1938 *dbx_lookup_type (typenums, objfile) = type;
1943 /* Sun ACC builtin int type */
1944 type = read_sun_builtin_type (pp, typenums, objfile);
1945 if (typenums[0] != -1)
1946 *dbx_lookup_type (typenums, objfile) = type;
1950 case 'R': /* Sun ACC builtin float type */
1951 type = read_sun_floating_type (pp, typenums, objfile);
1952 if (typenums[0] != -1)
1953 *dbx_lookup_type (typenums, objfile) = type;
1956 case 'e': /* Enumeration type */
1957 type = dbx_alloc_type (typenums, objfile);
1958 type = read_enum_type (pp, type, objfile);
1959 if (typenums[0] != -1)
1960 *dbx_lookup_type (typenums, objfile) = type;
1963 case 's': /* Struct type */
1964 case 'u': /* Union type */
1966 enum type_code type_code = TYPE_CODE_UNDEF;
1967 type = dbx_alloc_type (typenums, objfile);
1968 switch (type_descriptor)
1971 type_code = TYPE_CODE_STRUCT;
1974 type_code = TYPE_CODE_UNION;
1977 type = read_struct_type (pp, type, type_code, objfile);
1981 case 'a': /* Array type */
1983 return error_type (pp, objfile);
1986 type = dbx_alloc_type (typenums, objfile);
1987 type = read_array_type (pp, type, objfile);
1989 TYPE_CODE (type) = TYPE_CODE_STRING;
1991 make_vector_type (type);
1994 case 'S': /* Set or bitstring type */
1995 type1 = read_type (pp, objfile);
1996 type = create_set_type ((struct type *) NULL, type1);
1998 TYPE_CODE (type) = TYPE_CODE_BITSTRING;
1999 if (typenums[0] != -1)
2000 *dbx_lookup_type (typenums, objfile) = type;
2004 --*pp; /* Go back to the symbol in error */
2005 /* Particularly important if it was \0! */
2006 return error_type (pp, objfile);
2011 warning (_("GDB internal error, type is NULL in stabsread.c."));
2012 return error_type (pp, objfile);
2015 /* Size specified in a type attribute overrides any other size. */
2016 if (type_size != -1)
2017 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2022 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2023 Return the proper type node for a given builtin type number. */
2025 static const struct objfile_data *rs6000_builtin_type_data;
2027 static struct type *
2028 rs6000_builtin_type (int typenum, struct objfile *objfile)
2030 struct type **negative_types = objfile_data (objfile, rs6000_builtin_type_data);
2032 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2033 #define NUMBER_RECOGNIZED 34
2034 struct type *rettype = NULL;
2036 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2038 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
2039 return objfile_type (objfile)->builtin_error;
2042 if (!negative_types)
2044 /* This includes an empty slot for type number -0. */
2045 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2046 NUMBER_RECOGNIZED + 1, struct type *);
2047 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2050 if (negative_types[-typenum] != NULL)
2051 return negative_types[-typenum];
2053 #if TARGET_CHAR_BIT != 8
2054 #error This code wrong for TARGET_CHAR_BIT not 8
2055 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2056 that if that ever becomes not true, the correct fix will be to
2057 make the size in the struct type to be in bits, not in units of
2064 /* The size of this and all the other types are fixed, defined
2065 by the debugging format. If there is a type called "int" which
2066 is other than 32 bits, then it should use a new negative type
2067 number (or avoid negative type numbers for that case).
2068 See stabs.texinfo. */
2069 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", objfile);
2072 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", objfile);
2075 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", objfile);
2078 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", objfile);
2081 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
2082 "unsigned char", objfile);
2085 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", objfile);
2088 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
2089 "unsigned short", objfile);
2092 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2093 "unsigned int", objfile);
2096 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2097 "unsigned", objfile);
2099 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2100 "unsigned long", objfile);
2103 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", objfile);
2106 /* IEEE single precision (32 bit). */
2107 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", objfile);
2110 /* IEEE double precision (64 bit). */
2111 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", objfile);
2114 /* This is an IEEE double on the RS/6000, and different machines with
2115 different sizes for "long double" should use different negative
2116 type numbers. See stabs.texinfo. */
2117 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", objfile);
2120 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", objfile);
2123 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2124 "boolean", objfile);
2127 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", objfile);
2130 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", objfile);
2133 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", objfile);
2136 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2137 "character", objfile);
2140 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2141 "logical*1", objfile);
2144 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2145 "logical*2", objfile);
2148 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2149 "logical*4", objfile);
2152 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2153 "logical", objfile);
2156 /* Complex type consisting of two IEEE single precision values. */
2157 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", objfile);
2158 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2162 /* Complex type consisting of two IEEE double precision values. */
2163 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2164 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2168 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", objfile);
2171 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", objfile);
2174 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", objfile);
2177 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", objfile);
2180 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", objfile);
2183 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2184 "unsigned long long", objfile);
2187 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2188 "logical*8", objfile);
2191 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", objfile);
2194 negative_types[-typenum] = rettype;
2198 /* This page contains subroutines of read_type. */
2200 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2203 update_method_name_from_physname (char **old_name, char *physname)
2207 method_name = method_name_from_physname (physname);
2209 if (method_name == NULL)
2211 complaint (&symfile_complaints,
2212 _("Method has bad physname %s\n"), physname);
2216 if (strcmp (*old_name, method_name) != 0)
2219 *old_name = method_name;
2222 xfree (method_name);
2225 /* Read member function stabs info for C++ classes. The form of each member
2228 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2230 An example with two member functions is:
2232 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2234 For the case of overloaded operators, the format is op$::*.funcs, where
2235 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2236 name (such as `+=') and `.' marks the end of the operator name.
2238 Returns 1 for success, 0 for failure. */
2241 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2242 struct objfile *objfile)
2246 /* Total number of member functions defined in this class. If the class
2247 defines two `f' functions, and one `g' function, then this will have
2249 int total_length = 0;
2253 struct next_fnfield *next;
2254 struct fn_field fn_field;
2257 struct type *look_ahead_type;
2258 struct next_fnfieldlist *new_fnlist;
2259 struct next_fnfield *new_sublist;
2263 /* Process each list until we find something that is not a member function
2264 or find the end of the functions. */
2268 /* We should be positioned at the start of the function name.
2269 Scan forward to find the first ':' and if it is not the
2270 first of a "::" delimiter, then this is not a member function. */
2282 look_ahead_type = NULL;
2285 new_fnlist = (struct next_fnfieldlist *)
2286 xmalloc (sizeof (struct next_fnfieldlist));
2287 make_cleanup (xfree, new_fnlist);
2288 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
2290 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2292 /* This is a completely wierd case. In order to stuff in the
2293 names that might contain colons (the usual name delimiter),
2294 Mike Tiemann defined a different name format which is
2295 signalled if the identifier is "op$". In that case, the
2296 format is "op$::XXXX." where XXXX is the name. This is
2297 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2298 /* This lets the user type "break operator+".
2299 We could just put in "+" as the name, but that wouldn't
2301 static char opname[32] = "op$";
2302 char *o = opname + 3;
2304 /* Skip past '::'. */
2307 STABS_CONTINUE (pp, objfile);
2313 main_fn_name = savestring (opname, o - opname);
2319 main_fn_name = savestring (*pp, p - *pp);
2320 /* Skip past '::'. */
2323 new_fnlist->fn_fieldlist.name = main_fn_name;
2328 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
2329 make_cleanup (xfree, new_sublist);
2330 memset (new_sublist, 0, sizeof (struct next_fnfield));
2332 /* Check for and handle cretinous dbx symbol name continuation! */
2333 if (look_ahead_type == NULL)
2336 STABS_CONTINUE (pp, objfile);
2338 new_sublist->fn_field.type = read_type (pp, objfile);
2341 /* Invalid symtab info for member function. */
2347 /* g++ version 1 kludge */
2348 new_sublist->fn_field.type = look_ahead_type;
2349 look_ahead_type = NULL;
2359 /* If this is just a stub, then we don't have the real name here. */
2361 if (TYPE_STUB (new_sublist->fn_field.type))
2363 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
2364 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
2365 new_sublist->fn_field.is_stub = 1;
2367 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2370 /* Set this member function's visibility fields. */
2373 case VISIBILITY_PRIVATE:
2374 new_sublist->fn_field.is_private = 1;
2376 case VISIBILITY_PROTECTED:
2377 new_sublist->fn_field.is_protected = 1;
2381 STABS_CONTINUE (pp, objfile);
2384 case 'A': /* Normal functions. */
2385 new_sublist->fn_field.is_const = 0;
2386 new_sublist->fn_field.is_volatile = 0;
2389 case 'B': /* `const' member functions. */
2390 new_sublist->fn_field.is_const = 1;
2391 new_sublist->fn_field.is_volatile = 0;
2394 case 'C': /* `volatile' member function. */
2395 new_sublist->fn_field.is_const = 0;
2396 new_sublist->fn_field.is_volatile = 1;
2399 case 'D': /* `const volatile' member function. */
2400 new_sublist->fn_field.is_const = 1;
2401 new_sublist->fn_field.is_volatile = 1;
2404 case '*': /* File compiled with g++ version 1 -- no info */
2409 complaint (&symfile_complaints,
2410 _("const/volatile indicator missing, got '%c'"), **pp);
2419 /* virtual member function, followed by index.
2420 The sign bit is set to distinguish pointers-to-methods
2421 from virtual function indicies. Since the array is
2422 in words, the quantity must be shifted left by 1
2423 on 16 bit machine, and by 2 on 32 bit machine, forcing
2424 the sign bit out, and usable as a valid index into
2425 the array. Remove the sign bit here. */
2426 new_sublist->fn_field.voffset =
2427 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2431 STABS_CONTINUE (pp, objfile);
2432 if (**pp == ';' || **pp == '\0')
2434 /* Must be g++ version 1. */
2435 new_sublist->fn_field.fcontext = 0;
2439 /* Figure out from whence this virtual function came.
2440 It may belong to virtual function table of
2441 one of its baseclasses. */
2442 look_ahead_type = read_type (pp, objfile);
2445 /* g++ version 1 overloaded methods. */
2449 new_sublist->fn_field.fcontext = look_ahead_type;
2458 look_ahead_type = NULL;
2464 /* static member function. */
2466 int slen = strlen (main_fn_name);
2468 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2470 /* For static member functions, we can't tell if they
2471 are stubbed, as they are put out as functions, and not as
2473 GCC v2 emits the fully mangled name if
2474 dbxout.c:flag_minimal_debug is not set, so we have to
2475 detect a fully mangled physname here and set is_stub
2476 accordingly. Fully mangled physnames in v2 start with
2477 the member function name, followed by two underscores.
2478 GCC v3 currently always emits stubbed member functions,
2479 but with fully mangled physnames, which start with _Z. */
2480 if (!(strncmp (new_sublist->fn_field.physname,
2481 main_fn_name, slen) == 0
2482 && new_sublist->fn_field.physname[slen] == '_'
2483 && new_sublist->fn_field.physname[slen + 1] == '_'))
2485 new_sublist->fn_field.is_stub = 1;
2492 complaint (&symfile_complaints,
2493 _("member function type missing, got '%c'"), (*pp)[-1]);
2494 /* Fall through into normal member function. */
2497 /* normal member function. */
2498 new_sublist->fn_field.voffset = 0;
2499 new_sublist->fn_field.fcontext = 0;
2503 new_sublist->next = sublist;
2504 sublist = new_sublist;
2506 STABS_CONTINUE (pp, objfile);
2508 while (**pp != ';' && **pp != '\0');
2511 STABS_CONTINUE (pp, objfile);
2513 /* Skip GCC 3.X member functions which are duplicates of the callable
2514 constructor/destructor. */
2515 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2516 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2517 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2519 xfree (main_fn_name);
2524 int has_destructor = 0, has_other = 0;
2526 struct next_fnfield *tmp_sublist;
2528 /* Various versions of GCC emit various mostly-useless
2529 strings in the name field for special member functions.
2531 For stub methods, we need to defer correcting the name
2532 until we are ready to unstub the method, because the current
2533 name string is used by gdb_mangle_name. The only stub methods
2534 of concern here are GNU v2 operators; other methods have their
2535 names correct (see caveat below).
2537 For non-stub methods, in GNU v3, we have a complete physname.
2538 Therefore we can safely correct the name now. This primarily
2539 affects constructors and destructors, whose name will be
2540 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2541 operators will also have incorrect names; for instance,
2542 "operator int" will be named "operator i" (i.e. the type is
2545 For non-stub methods in GNU v2, we have no easy way to
2546 know if we have a complete physname or not. For most
2547 methods the result depends on the platform (if CPLUS_MARKER
2548 can be `$' or `.', it will use minimal debug information, or
2549 otherwise the full physname will be included).
2551 Rather than dealing with this, we take a different approach.
2552 For v3 mangled names, we can use the full physname; for v2,
2553 we use cplus_demangle_opname (which is actually v2 specific),
2554 because the only interesting names are all operators - once again
2555 barring the caveat below. Skip this process if any method in the
2556 group is a stub, to prevent our fouling up the workings of
2559 The caveat: GCC 2.95.x (and earlier?) put constructors and
2560 destructors in the same method group. We need to split this
2561 into two groups, because they should have different names.
2562 So for each method group we check whether it contains both
2563 routines whose physname appears to be a destructor (the physnames
2564 for and destructors are always provided, due to quirks in v2
2565 mangling) and routines whose physname does not appear to be a
2566 destructor. If so then we break up the list into two halves.
2567 Even if the constructors and destructors aren't in the same group
2568 the destructor will still lack the leading tilde, so that also
2571 So, to summarize what we expect and handle here:
2573 Given Given Real Real Action
2574 method name physname physname method name
2576 __opi [none] __opi__3Foo operator int opname
2578 Foo _._3Foo _._3Foo ~Foo separate and
2580 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2581 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2584 tmp_sublist = sublist;
2585 while (tmp_sublist != NULL)
2587 if (tmp_sublist->fn_field.is_stub)
2589 if (tmp_sublist->fn_field.physname[0] == '_'
2590 && tmp_sublist->fn_field.physname[1] == 'Z')
2593 if (is_destructor_name (tmp_sublist->fn_field.physname))
2598 tmp_sublist = tmp_sublist->next;
2601 if (has_destructor && has_other)
2603 struct next_fnfieldlist *destr_fnlist;
2604 struct next_fnfield *last_sublist;
2606 /* Create a new fn_fieldlist for the destructors. */
2608 destr_fnlist = (struct next_fnfieldlist *)
2609 xmalloc (sizeof (struct next_fnfieldlist));
2610 make_cleanup (xfree, destr_fnlist);
2611 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
2612 destr_fnlist->fn_fieldlist.name
2613 = obconcat (&objfile->objfile_obstack, "", "~",
2614 new_fnlist->fn_fieldlist.name);
2616 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2617 obstack_alloc (&objfile->objfile_obstack,
2618 sizeof (struct fn_field) * has_destructor);
2619 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2620 sizeof (struct fn_field) * has_destructor);
2621 tmp_sublist = sublist;
2622 last_sublist = NULL;
2624 while (tmp_sublist != NULL)
2626 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2628 tmp_sublist = tmp_sublist->next;
2632 destr_fnlist->fn_fieldlist.fn_fields[i++]
2633 = tmp_sublist->fn_field;
2635 last_sublist->next = tmp_sublist->next;
2637 sublist = tmp_sublist->next;
2638 last_sublist = tmp_sublist;
2639 tmp_sublist = tmp_sublist->next;
2642 destr_fnlist->fn_fieldlist.length = has_destructor;
2643 destr_fnlist->next = fip->fnlist;
2644 fip->fnlist = destr_fnlist;
2646 total_length += has_destructor;
2647 length -= has_destructor;
2651 /* v3 mangling prevents the use of abbreviated physnames,
2652 so we can do this here. There are stubbed methods in v3
2654 - in -gstabs instead of -gstabs+
2655 - or for static methods, which are output as a function type
2656 instead of a method type. */
2658 update_method_name_from_physname (&new_fnlist->fn_fieldlist.name,
2659 sublist->fn_field.physname);
2661 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2663 new_fnlist->fn_fieldlist.name =
2664 concat ("~", main_fn_name, (char *)NULL);
2665 xfree (main_fn_name);
2669 char dem_opname[256];
2671 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2672 dem_opname, DMGL_ANSI);
2674 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2677 new_fnlist->fn_fieldlist.name
2678 = obsavestring (dem_opname, strlen (dem_opname),
2679 &objfile->objfile_obstack);
2682 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2683 obstack_alloc (&objfile->objfile_obstack,
2684 sizeof (struct fn_field) * length);
2685 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2686 sizeof (struct fn_field) * length);
2687 for (i = length; (i--, sublist); sublist = sublist->next)
2689 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2692 new_fnlist->fn_fieldlist.length = length;
2693 new_fnlist->next = fip->fnlist;
2694 fip->fnlist = new_fnlist;
2696 total_length += length;
2702 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2703 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2704 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2705 memset (TYPE_FN_FIELDLISTS (type), 0,
2706 sizeof (struct fn_fieldlist) * nfn_fields);
2707 TYPE_NFN_FIELDS (type) = nfn_fields;
2708 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
2714 /* Special GNU C++ name.
2716 Returns 1 for success, 0 for failure. "failure" means that we can't
2717 keep parsing and it's time for error_type(). */
2720 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2721 struct objfile *objfile)
2726 struct type *context;
2736 /* At this point, *pp points to something like "22:23=*22...",
2737 where the type number before the ':' is the "context" and
2738 everything after is a regular type definition. Lookup the
2739 type, find it's name, and construct the field name. */
2741 context = read_type (pp, objfile);
2745 case 'f': /* $vf -- a virtual function table pointer */
2746 name = type_name_no_tag (context);
2751 fip->list->field.name =
2752 obconcat (&objfile->objfile_obstack, vptr_name, name, "");
2755 case 'b': /* $vb -- a virtual bsomethingorother */
2756 name = type_name_no_tag (context);
2759 complaint (&symfile_complaints,
2760 _("C++ abbreviated type name unknown at symtab pos %d"),
2764 fip->list->field.name =
2765 obconcat (&objfile->objfile_obstack, vb_name, name, "");
2769 invalid_cpp_abbrev_complaint (*pp);
2770 fip->list->field.name =
2771 obconcat (&objfile->objfile_obstack,
2772 "INVALID_CPLUSPLUS_ABBREV", "", "");
2776 /* At this point, *pp points to the ':'. Skip it and read the
2782 invalid_cpp_abbrev_complaint (*pp);
2785 fip->list->field.type = read_type (pp, objfile);
2787 (*pp)++; /* Skip the comma. */
2793 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ';', &nbits,
2798 /* This field is unpacked. */
2799 FIELD_BITSIZE (fip->list->field) = 0;
2800 fip->list->visibility = VISIBILITY_PRIVATE;
2804 invalid_cpp_abbrev_complaint (*pp);
2805 /* We have no idea what syntax an unrecognized abbrev would have, so
2806 better return 0. If we returned 1, we would need to at least advance
2807 *pp to avoid an infinite loop. */
2814 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2815 struct type *type, struct objfile *objfile)
2817 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2819 fip->list->field.name =
2820 obsavestring (*pp, p - *pp, &objfile->objfile_obstack);
2823 /* This means we have a visibility for a field coming. */
2827 fip->list->visibility = *(*pp)++;
2831 /* normal dbx-style format, no explicit visibility */
2832 fip->list->visibility = VISIBILITY_PUBLIC;
2835 fip->list->field.type = read_type (pp, objfile);
2840 /* Possible future hook for nested types. */
2843 fip->list->field.bitpos = (long) -2; /* nested type */
2853 /* Static class member. */
2854 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2858 else if (**pp != ',')
2860 /* Bad structure-type format. */
2861 stabs_general_complaint ("bad structure-type format");
2865 (*pp)++; /* Skip the comma. */
2869 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ',', &nbits, 0);
2872 stabs_general_complaint ("bad structure-type format");
2875 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2878 stabs_general_complaint ("bad structure-type format");
2883 if (FIELD_BITPOS (fip->list->field) == 0
2884 && FIELD_BITSIZE (fip->list->field) == 0)
2886 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2887 it is a field which has been optimized out. The correct stab for
2888 this case is to use VISIBILITY_IGNORE, but that is a recent
2889 invention. (2) It is a 0-size array. For example
2890 union { int num; char str[0]; } foo. Printing _("<no value>" for
2891 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2892 will continue to work, and a 0-size array as a whole doesn't
2893 have any contents to print.
2895 I suspect this probably could also happen with gcc -gstabs (not
2896 -gstabs+) for static fields, and perhaps other C++ extensions.
2897 Hopefully few people use -gstabs with gdb, since it is intended
2898 for dbx compatibility. */
2900 /* Ignore this field. */
2901 fip->list->visibility = VISIBILITY_IGNORE;
2905 /* Detect an unpacked field and mark it as such.
2906 dbx gives a bit size for all fields.
2907 Note that forward refs cannot be packed,
2908 and treat enums as if they had the width of ints. */
2910 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2912 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2913 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2914 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2915 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2917 FIELD_BITSIZE (fip->list->field) = 0;
2919 if ((FIELD_BITSIZE (fip->list->field)
2920 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2921 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2922 && FIELD_BITSIZE (fip->list->field)
2923 == gdbarch_int_bit (gdbarch))
2926 FIELD_BITPOS (fip->list->field) % 8 == 0)
2928 FIELD_BITSIZE (fip->list->field) = 0;
2934 /* Read struct or class data fields. They have the form:
2936 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2938 At the end, we see a semicolon instead of a field.
2940 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2943 The optional VISIBILITY is one of:
2945 '/0' (VISIBILITY_PRIVATE)
2946 '/1' (VISIBILITY_PROTECTED)
2947 '/2' (VISIBILITY_PUBLIC)
2948 '/9' (VISIBILITY_IGNORE)
2950 or nothing, for C style fields with public visibility.
2952 Returns 1 for success, 0 for failure. */
2955 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
2956 struct objfile *objfile)
2959 struct nextfield *new;
2961 /* We better set p right now, in case there are no fields at all... */
2965 /* Read each data member type until we find the terminating ';' at the end of
2966 the data member list, or break for some other reason such as finding the
2967 start of the member function list. */
2968 /* Stab string for structure/union does not end with two ';' in
2969 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2971 while (**pp != ';' && **pp != '\0')
2973 STABS_CONTINUE (pp, objfile);
2974 /* Get space to record the next field's data. */
2975 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
2976 make_cleanup (xfree, new);
2977 memset (new, 0, sizeof (struct nextfield));
2978 new->next = fip->list;
2981 /* Get the field name. */
2984 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2985 unless the CPLUS_MARKER is followed by an underscore, in
2986 which case it is just the name of an anonymous type, which we
2987 should handle like any other type name. */
2989 if (is_cplus_marker (p[0]) && p[1] != '_')
2991 if (!read_cpp_abbrev (fip, pp, type, objfile))
2996 /* Look for the ':' that separates the field name from the field
2997 values. Data members are delimited by a single ':', while member
2998 functions are delimited by a pair of ':'s. When we hit the member
2999 functions (if any), terminate scan loop and return. */
3001 while (*p != ':' && *p != '\0')
3008 /* Check to see if we have hit the member functions yet. */
3013 read_one_struct_field (fip, pp, p, type, objfile);
3015 if (p[0] == ':' && p[1] == ':')
3017 /* (the deleted) chill the list of fields: the last entry (at
3018 the head) is a partially constructed entry which we now
3020 fip->list = fip->list->next;
3025 /* The stabs for C++ derived classes contain baseclass information which
3026 is marked by a '!' character after the total size. This function is
3027 called when we encounter the baseclass marker, and slurps up all the
3028 baseclass information.
3030 Immediately following the '!' marker is the number of base classes that
3031 the class is derived from, followed by information for each base class.
3032 For each base class, there are two visibility specifiers, a bit offset
3033 to the base class information within the derived class, a reference to
3034 the type for the base class, and a terminating semicolon.
3036 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3038 Baseclass information marker __________________|| | | | | | |
3039 Number of baseclasses __________________________| | | | | | |
3040 Visibility specifiers (2) ________________________| | | | | |
3041 Offset in bits from start of class _________________| | | | |
3042 Type number for base class ___________________________| | | |
3043 Visibility specifiers (2) _______________________________| | |
3044 Offset in bits from start of class ________________________| |
3045 Type number of base class ____________________________________|
3047 Return 1 for success, 0 for (error-type-inducing) failure. */
3053 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3054 struct objfile *objfile)
3057 struct nextfield *new;
3065 /* Skip the '!' baseclass information marker. */
3069 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3072 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3078 /* Some stupid compilers have trouble with the following, so break
3079 it up into simpler expressions. */
3080 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3081 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3084 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3087 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3088 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3092 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3094 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3096 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3097 make_cleanup (xfree, new);
3098 memset (new, 0, sizeof (struct nextfield));
3099 new->next = fip->list;
3101 FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */
3103 STABS_CONTINUE (pp, objfile);
3107 /* Nothing to do. */
3110 SET_TYPE_FIELD_VIRTUAL (type, i);
3113 /* Unknown character. Complain and treat it as non-virtual. */
3115 complaint (&symfile_complaints,
3116 _("Unknown virtual character `%c' for baseclass"), **pp);
3121 new->visibility = *(*pp)++;
3122 switch (new->visibility)
3124 case VISIBILITY_PRIVATE:
3125 case VISIBILITY_PROTECTED:
3126 case VISIBILITY_PUBLIC:
3129 /* Bad visibility format. Complain and treat it as
3132 complaint (&symfile_complaints,
3133 _("Unknown visibility `%c' for baseclass"),
3135 new->visibility = VISIBILITY_PUBLIC;
3142 /* The remaining value is the bit offset of the portion of the object
3143 corresponding to this baseclass. Always zero in the absence of
3144 multiple inheritance. */
3146 FIELD_BITPOS (new->field) = read_huge_number (pp, ',', &nbits, 0);
3151 /* The last piece of baseclass information is the type of the
3152 base class. Read it, and remember it's type name as this
3155 new->field.type = read_type (pp, objfile);
3156 new->field.name = type_name_no_tag (new->field.type);
3158 /* skip trailing ';' and bump count of number of fields seen */
3167 /* The tail end of stabs for C++ classes that contain a virtual function
3168 pointer contains a tilde, a %, and a type number.
3169 The type number refers to the base class (possibly this class itself) which
3170 contains the vtable pointer for the current class.
3172 This function is called when we have parsed all the method declarations,
3173 so we can look for the vptr base class info. */
3176 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3177 struct objfile *objfile)
3181 STABS_CONTINUE (pp, objfile);
3183 /* If we are positioned at a ';', then skip it. */
3193 if (**pp == '=' || **pp == '+' || **pp == '-')
3195 /* Obsolete flags that used to indicate the presence
3196 of constructors and/or destructors. */
3200 /* Read either a '%' or the final ';'. */
3201 if (*(*pp)++ == '%')
3203 /* The next number is the type number of the base class
3204 (possibly our own class) which supplies the vtable for
3205 this class. Parse it out, and search that class to find
3206 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3207 and TYPE_VPTR_FIELDNO. */
3212 t = read_type (pp, objfile);
3214 while (*p != '\0' && *p != ';')
3220 /* Premature end of symbol. */
3224 TYPE_VPTR_BASETYPE (type) = t;
3225 if (type == t) /* Our own class provides vtbl ptr */
3227 for (i = TYPE_NFIELDS (t) - 1;
3228 i >= TYPE_N_BASECLASSES (t);
3231 char *name = TYPE_FIELD_NAME (t, i);
3232 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3233 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3235 TYPE_VPTR_FIELDNO (type) = i;
3239 /* Virtual function table field not found. */
3240 complaint (&symfile_complaints,
3241 _("virtual function table pointer not found when defining class `%s'"),
3247 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
3258 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3262 for (n = TYPE_NFN_FIELDS (type);
3263 fip->fnlist != NULL;
3264 fip->fnlist = fip->fnlist->next)
3266 --n; /* Circumvent Sun3 compiler bug */
3267 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3272 /* Create the vector of fields, and record how big it is.
3273 We need this info to record proper virtual function table information
3274 for this class's virtual functions. */
3277 attach_fields_to_type (struct field_info *fip, struct type *type,
3278 struct objfile *objfile)
3281 int non_public_fields = 0;
3282 struct nextfield *scan;
3284 /* Count up the number of fields that we have, as well as taking note of
3285 whether or not there are any non-public fields, which requires us to
3286 allocate and build the private_field_bits and protected_field_bits
3289 for (scan = fip->list; scan != NULL; scan = scan->next)
3292 if (scan->visibility != VISIBILITY_PUBLIC)
3294 non_public_fields++;
3298 /* Now we know how many fields there are, and whether or not there are any
3299 non-public fields. Record the field count, allocate space for the
3300 array of fields, and create blank visibility bitfields if necessary. */
3302 TYPE_NFIELDS (type) = nfields;
3303 TYPE_FIELDS (type) = (struct field *)
3304 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3305 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3307 if (non_public_fields)
3309 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3311 TYPE_FIELD_PRIVATE_BITS (type) =
3312 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3313 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3315 TYPE_FIELD_PROTECTED_BITS (type) =
3316 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3317 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3319 TYPE_FIELD_IGNORE_BITS (type) =
3320 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3321 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3324 /* Copy the saved-up fields into the field vector. Start from the head
3325 of the list, adding to the tail of the field array, so that they end
3326 up in the same order in the array in which they were added to the list. */
3328 while (nfields-- > 0)
3330 TYPE_FIELD (type, nfields) = fip->list->field;
3331 switch (fip->list->visibility)
3333 case VISIBILITY_PRIVATE:
3334 SET_TYPE_FIELD_PRIVATE (type, nfields);
3337 case VISIBILITY_PROTECTED:
3338 SET_TYPE_FIELD_PROTECTED (type, nfields);
3341 case VISIBILITY_IGNORE:
3342 SET_TYPE_FIELD_IGNORE (type, nfields);
3345 case VISIBILITY_PUBLIC:
3349 /* Unknown visibility. Complain and treat it as public. */
3351 complaint (&symfile_complaints, _("Unknown visibility `%c' for field"),
3352 fip->list->visibility);
3356 fip->list = fip->list->next;
3362 /* Complain that the compiler has emitted more than one definition for the
3363 structure type TYPE. */
3365 complain_about_struct_wipeout (struct type *type)
3370 if (TYPE_TAG_NAME (type))
3372 name = TYPE_TAG_NAME (type);
3373 switch (TYPE_CODE (type))
3375 case TYPE_CODE_STRUCT: kind = "struct "; break;
3376 case TYPE_CODE_UNION: kind = "union "; break;
3377 case TYPE_CODE_ENUM: kind = "enum "; break;
3381 else if (TYPE_NAME (type))
3383 name = TYPE_NAME (type);
3392 complaint (&symfile_complaints,
3393 _("struct/union type gets multiply defined: %s%s"), kind, name);
3396 /* Set the length for all variants of a same main_type, which are
3397 connected in the closed chain.
3399 This is something that needs to be done when a type is defined *after*
3400 some cross references to this type have already been read. Consider
3401 for instance the following scenario where we have the following two
3404 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3405 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3407 A stubbed version of type dummy is created while processing the first
3408 stabs entry. The length of that type is initially set to zero, since
3409 it is unknown at this point. Also, a "constant" variation of type
3410 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3413 The second stabs entry allows us to replace the stubbed definition
3414 with the real definition. However, we still need to adjust the length
3415 of the "constant" variation of that type, as its length was left
3416 untouched during the main type replacement... */
3419 set_length_in_type_chain (struct type *type)
3421 struct type *ntype = TYPE_CHAIN (type);
3423 while (ntype != type)
3425 if (TYPE_LENGTH(ntype) == 0)
3426 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3428 complain_about_struct_wipeout (ntype);
3429 ntype = TYPE_CHAIN (ntype);
3433 /* Read the description of a structure (or union type) and return an object
3434 describing the type.
3436 PP points to a character pointer that points to the next unconsumed token
3437 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3438 *PP will point to "4a:1,0,32;;".
3440 TYPE points to an incomplete type that needs to be filled in.
3442 OBJFILE points to the current objfile from which the stabs information is
3443 being read. (Note that it is redundant in that TYPE also contains a pointer
3444 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3447 static struct type *
3448 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3449 struct objfile *objfile)
3451 struct cleanup *back_to;
3452 struct field_info fi;
3457 /* When describing struct/union/class types in stabs, G++ always drops
3458 all qualifications from the name. So if you've got:
3459 struct A { ... struct B { ... }; ... };
3460 then G++ will emit stabs for `struct A::B' that call it simply
3461 `struct B'. Obviously, if you've got a real top-level definition for
3462 `struct B', or other nested definitions, this is going to cause
3465 Obviously, GDB can't fix this by itself, but it can at least avoid
3466 scribbling on existing structure type objects when new definitions
3468 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3469 || TYPE_STUB (type)))
3471 complain_about_struct_wipeout (type);
3473 /* It's probably best to return the type unchanged. */
3477 back_to = make_cleanup (null_cleanup, 0);
3479 INIT_CPLUS_SPECIFIC (type);
3480 TYPE_CODE (type) = type_code;
3481 TYPE_STUB (type) = 0;
3483 /* First comes the total size in bytes. */
3487 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3489 return error_type (pp, objfile);
3490 set_length_in_type_chain (type);
3493 /* Now read the baseclasses, if any, read the regular C struct or C++
3494 class member fields, attach the fields to the type, read the C++
3495 member functions, attach them to the type, and then read any tilde
3496 field (baseclass specifier for the class holding the main vtable). */
3498 if (!read_baseclasses (&fi, pp, type, objfile)
3499 || !read_struct_fields (&fi, pp, type, objfile)
3500 || !attach_fields_to_type (&fi, type, objfile)
3501 || !read_member_functions (&fi, pp, type, objfile)
3502 || !attach_fn_fields_to_type (&fi, type)
3503 || !read_tilde_fields (&fi, pp, type, objfile))
3505 type = error_type (pp, objfile);
3508 do_cleanups (back_to);
3512 /* Read a definition of an array type,
3513 and create and return a suitable type object.
3514 Also creates a range type which represents the bounds of that
3517 static struct type *
3518 read_array_type (char **pp, struct type *type,
3519 struct objfile *objfile)
3521 struct type *index_type, *element_type, *range_type;
3526 /* Format of an array type:
3527 "ar<index type>;lower;upper;<array_contents_type>".
3528 OS9000: "arlower,upper;<array_contents_type>".
3530 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3531 for these, produce a type like float[][]. */
3534 index_type = read_type (pp, objfile);
3536 /* Improper format of array type decl. */
3537 return error_type (pp, objfile);
3541 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3546 lower = read_huge_number (pp, ';', &nbits, 0);
3549 return error_type (pp, objfile);
3551 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3556 upper = read_huge_number (pp, ';', &nbits, 0);
3558 return error_type (pp, objfile);
3560 element_type = read_type (pp, objfile);
3569 create_range_type ((struct type *) NULL, index_type, lower, upper);
3570 type = create_array_type (type, element_type, range_type);
3576 /* Read a definition of an enumeration type,
3577 and create and return a suitable type object.
3578 Also defines the symbols that represent the values of the type. */
3580 static struct type *
3581 read_enum_type (char **pp, struct type *type,
3582 struct objfile *objfile)
3584 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3590 struct pending **symlist;
3591 struct pending *osyms, *syms;
3594 int unsigned_enum = 1;
3597 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3598 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3599 to do? For now, force all enum values to file scope. */
3600 if (within_function)
3601 symlist = &local_symbols;
3604 symlist = &file_symbols;
3606 o_nsyms = osyms ? osyms->nsyms : 0;
3608 /* The aix4 compiler emits an extra field before the enum members;
3609 my guess is it's a type of some sort. Just ignore it. */
3612 /* Skip over the type. */
3616 /* Skip over the colon. */
3620 /* Read the value-names and their values.
3621 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3622 A semicolon or comma instead of a NAME means the end. */
3623 while (**pp && **pp != ';' && **pp != ',')
3625 STABS_CONTINUE (pp, objfile);
3629 name = obsavestring (*pp, p - *pp, &objfile->objfile_obstack);
3631 n = read_huge_number (pp, ',', &nbits, 0);
3633 return error_type (pp, objfile);
3635 sym = (struct symbol *)
3636 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
3637 memset (sym, 0, sizeof (struct symbol));
3638 SYMBOL_SET_LINKAGE_NAME (sym, name);
3639 SYMBOL_LANGUAGE (sym) = current_subfile->language;
3640 SYMBOL_CLASS (sym) = LOC_CONST;
3641 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3642 SYMBOL_VALUE (sym) = n;
3645 add_symbol_to_list (sym, symlist);
3650 (*pp)++; /* Skip the semicolon. */
3652 /* Now fill in the fields of the type-structure. */
3654 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3655 set_length_in_type_chain (type);
3656 TYPE_CODE (type) = TYPE_CODE_ENUM;
3657 TYPE_STUB (type) = 0;
3659 TYPE_UNSIGNED (type) = 1;
3660 TYPE_NFIELDS (type) = nsyms;
3661 TYPE_FIELDS (type) = (struct field *)
3662 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3663 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3665 /* Find the symbols for the values and put them into the type.
3666 The symbols can be found in the symlist that we put them on
3667 to cause them to be defined. osyms contains the old value
3668 of that symlist; everything up to there was defined by us. */
3669 /* Note that we preserve the order of the enum constants, so
3670 that in something like "enum {FOO, LAST_THING=FOO}" we print
3671 FOO, not LAST_THING. */
3673 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3675 int last = syms == osyms ? o_nsyms : 0;
3676 int j = syms->nsyms;
3677 for (; --j >= last; --n)
3679 struct symbol *xsym = syms->symbol[j];
3680 SYMBOL_TYPE (xsym) = type;
3681 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3682 TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
3683 TYPE_FIELD_BITSIZE (type, n) = 0;
3692 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3693 typedefs in every file (for int, long, etc):
3695 type = b <signed> <width> <format type>; <offset>; <nbits>
3697 optional format type = c or b for char or boolean.
3698 offset = offset from high order bit to start bit of type.
3699 width is # bytes in object of this type, nbits is # bits in type.
3701 The width/offset stuff appears to be for small objects stored in
3702 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3705 static struct type *
3706 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3711 enum type_code code = TYPE_CODE_INT;
3722 return error_type (pp, objfile);
3726 /* For some odd reason, all forms of char put a c here. This is strange
3727 because no other type has this honor. We can safely ignore this because
3728 we actually determine 'char'acterness by the number of bits specified in
3730 Boolean forms, e.g Fortran logical*X, put a b here. */
3734 else if (**pp == 'b')
3736 code = TYPE_CODE_BOOL;
3740 /* The first number appears to be the number of bytes occupied
3741 by this type, except that unsigned short is 4 instead of 2.
3742 Since this information is redundant with the third number,
3743 we will ignore it. */
3744 read_huge_number (pp, ';', &nbits, 0);
3746 return error_type (pp, objfile);
3748 /* The second number is always 0, so ignore it too. */
3749 read_huge_number (pp, ';', &nbits, 0);
3751 return error_type (pp, objfile);
3753 /* The third number is the number of bits for this type. */
3754 type_bits = read_huge_number (pp, 0, &nbits, 0);
3756 return error_type (pp, objfile);
3757 /* The type *should* end with a semicolon. If it are embedded
3758 in a larger type the semicolon may be the only way to know where
3759 the type ends. If this type is at the end of the stabstring we
3760 can deal with the omitted semicolon (but we don't have to like
3761 it). Don't bother to complain(), Sun's compiler omits the semicolon
3767 return init_type (TYPE_CODE_VOID, 1,
3768 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3771 return init_type (code,
3772 type_bits / TARGET_CHAR_BIT,
3773 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3777 static struct type *
3778 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3783 struct type *rettype;
3785 /* The first number has more details about the type, for example
3787 details = read_huge_number (pp, ';', &nbits, 0);
3789 return error_type (pp, objfile);
3791 /* The second number is the number of bytes occupied by this type */
3792 nbytes = read_huge_number (pp, ';', &nbits, 0);
3794 return error_type (pp, objfile);
3796 if (details == NF_COMPLEX || details == NF_COMPLEX16
3797 || details == NF_COMPLEX32)
3799 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
3800 TYPE_TARGET_TYPE (rettype)
3801 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
3805 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
3808 /* Read a number from the string pointed to by *PP.
3809 The value of *PP is advanced over the number.
3810 If END is nonzero, the character that ends the
3811 number must match END, or an error happens;
3812 and that character is skipped if it does match.
3813 If END is zero, *PP is left pointing to that character.
3815 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3816 the number is represented in an octal representation, assume that
3817 it is represented in a 2's complement representation with a size of
3818 TWOS_COMPLEMENT_BITS.
3820 If the number fits in a long, set *BITS to 0 and return the value.
3821 If not, set *BITS to be the number of bits in the number and return 0.
3823 If encounter garbage, set *BITS to -1 and return 0. */
3826 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3837 int twos_complement_representation = 0;
3845 /* Leading zero means octal. GCC uses this to output values larger
3846 than an int (because that would be hard in decimal). */
3853 /* Skip extra zeros. */
3857 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3859 /* Octal, possibly signed. Check if we have enough chars for a
3864 while ((c = *p1) >= '0' && c < '8')
3868 if (len > twos_complement_bits / 3
3869 || (twos_complement_bits % 3 == 0 && len == twos_complement_bits / 3))
3871 /* Ok, we have enough characters for a signed value, check
3872 for signness by testing if the sign bit is set. */
3873 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3875 if (c & (1 << sign_bit))
3877 /* Definitely signed. */
3878 twos_complement_representation = 1;
3884 upper_limit = LONG_MAX / radix;
3886 while ((c = *p++) >= '0' && c < ('0' + radix))
3888 if (n <= upper_limit)
3890 if (twos_complement_representation)
3892 /* Octal, signed, twos complement representation. In
3893 this case, n is the corresponding absolute value. */
3896 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3907 /* unsigned representation */
3909 n += c - '0'; /* FIXME this overflows anyway */
3915 /* This depends on large values being output in octal, which is
3922 /* Ignore leading zeroes. */
3926 else if (c == '2' || c == '3')
3947 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
3949 /* We were supposed to parse a number with maximum
3950 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3961 /* Large decimal constants are an error (because it is hard to
3962 count how many bits are in them). */
3968 /* -0x7f is the same as 0x80. So deal with it by adding one to
3969 the number of bits. Two's complement represention octals
3970 can't have a '-' in front. */
3971 if (sign == -1 && !twos_complement_representation)
3982 /* It's *BITS which has the interesting information. */
3986 static struct type *
3987 read_range_type (char **pp, int typenums[2], int type_size,
3988 struct objfile *objfile)
3990 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3991 char *orig_pp = *pp;
3996 struct type *result_type;
3997 struct type *index_type = NULL;
3999 /* First comes a type we are a subrange of.
4000 In C it is usually 0, 1 or the type being defined. */
4001 if (read_type_number (pp, rangenums) != 0)
4002 return error_type (pp, objfile);
4003 self_subrange = (rangenums[0] == typenums[0] &&
4004 rangenums[1] == typenums[1]);
4009 index_type = read_type (pp, objfile);
4012 /* A semicolon should now follow; skip it. */
4016 /* The remaining two operands are usually lower and upper bounds
4017 of the range. But in some special cases they mean something else. */
4018 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4019 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4021 if (n2bits == -1 || n3bits == -1)
4022 return error_type (pp, objfile);
4025 goto handle_true_range;
4027 /* If limits are huge, must be large integral type. */
4028 if (n2bits != 0 || n3bits != 0)
4030 char got_signed = 0;
4031 char got_unsigned = 0;
4032 /* Number of bits in the type. */
4035 /* If a type size attribute has been specified, the bounds of
4036 the range should fit in this size. If the lower bounds needs
4037 more bits than the upper bound, then the type is signed. */
4038 if (n2bits <= type_size && n3bits <= type_size)
4040 if (n2bits == type_size && n2bits > n3bits)
4046 /* Range from 0 to <large number> is an unsigned large integral type. */
4047 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4052 /* Range from <large number> to <large number>-1 is a large signed
4053 integral type. Take care of the case where <large number> doesn't
4054 fit in a long but <large number>-1 does. */
4055 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4056 || (n2bits != 0 && n3bits == 0
4057 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4064 if (got_signed || got_unsigned)
4066 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
4067 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
4071 return error_type (pp, objfile);
4074 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4075 if (self_subrange && n2 == 0 && n3 == 0)
4076 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4078 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4079 is the width in bytes.
4081 Fortran programs appear to use this for complex types also. To
4082 distinguish between floats and complex, g77 (and others?) seem
4083 to use self-subranges for the complexes, and subranges of int for
4086 Also note that for complexes, g77 sets n2 to the size of one of
4087 the member floats, not the whole complex beast. My guess is that
4088 this was to work well with pre-COMPLEX versions of gdb. */
4090 if (n3 == 0 && n2 > 0)
4092 struct type *float_type
4093 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
4097 struct type *complex_type =
4098 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
4099 TYPE_TARGET_TYPE (complex_type) = float_type;
4100 return complex_type;
4106 /* If the upper bound is -1, it must really be an unsigned integral. */
4108 else if (n2 == 0 && n3 == -1)
4110 int bits = type_size;
4113 /* We don't know its size. It is unsigned int or unsigned
4114 long. GCC 2.3.3 uses this for long long too, but that is
4115 just a GDB 3.5 compatibility hack. */
4116 bits = gdbarch_int_bit (gdbarch);
4119 return init_type (TYPE_CODE_INT, bits / TARGET_CHAR_BIT,
4120 TYPE_FLAG_UNSIGNED, NULL, objfile);
4123 /* Special case: char is defined (Who knows why) as a subrange of
4124 itself with range 0-127. */
4125 else if (self_subrange && n2 == 0 && n3 == 127)
4126 return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile);
4128 /* We used to do this only for subrange of self or subrange of int. */
4131 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4132 "unsigned long", and we already checked for that,
4133 so don't need to test for it here. */
4136 /* n3 actually gives the size. */
4137 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
4140 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4141 unsigned n-byte integer. But do require n to be a power of
4142 two; we don't want 3- and 5-byte integers flying around. */
4148 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4151 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4152 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4156 /* I think this is for Convex "long long". Since I don't know whether
4157 Convex sets self_subrange, I also accept that particular size regardless
4158 of self_subrange. */
4159 else if (n3 == 0 && n2 < 0
4161 || n2 == -gdbarch_long_long_bit
4162 (gdbarch) / TARGET_CHAR_BIT))
4163 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4164 else if (n2 == -n3 - 1)
4167 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4169 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4170 if (n3 == 0x7fffffff)
4171 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4174 /* We have a real range type on our hands. Allocate space and
4175 return a real pointer. */
4179 index_type = objfile_type (objfile)->builtin_int;
4181 index_type = *dbx_lookup_type (rangenums, objfile);
4182 if (index_type == NULL)
4184 /* Does this actually ever happen? Is that why we are worrying
4185 about dealing with it rather than just calling error_type? */
4187 complaint (&symfile_complaints,
4188 _("base type %d of range type is not defined"), rangenums[1]);
4190 index_type = objfile_type (objfile)->builtin_int;
4193 result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
4194 return (result_type);
4197 /* Read in an argument list. This is a list of types, separated by commas
4198 and terminated with END. Return the list of types read in, or NULL
4199 if there is an error. */
4201 static struct field *
4202 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4205 /* FIXME! Remove this arbitrary limit! */
4206 struct type *types[1024]; /* allow for fns of 1023 parameters */
4213 /* Invalid argument list: no ','. */
4216 STABS_CONTINUE (pp, objfile);
4217 types[n++] = read_type (pp, objfile);
4219 (*pp)++; /* get past `end' (the ':' character) */
4223 /* We should read at least the THIS parameter here. Some broken stabs
4224 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4225 have been present ";-16,(0,43)" reference instead. This way the
4226 excessive ";" marker prematurely stops the parameters parsing. */
4228 complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
4231 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4239 rval = (struct field *) xmalloc (n * sizeof (struct field));
4240 memset (rval, 0, n * sizeof (struct field));
4241 for (i = 0; i < n; i++)
4242 rval[i].type = types[i];
4247 /* Common block handling. */
4249 /* List of symbols declared since the last BCOMM. This list is a tail
4250 of local_symbols. When ECOMM is seen, the symbols on the list
4251 are noted so their proper addresses can be filled in later,
4252 using the common block base address gotten from the assembler
4255 static struct pending *common_block;
4256 static int common_block_i;
4258 /* Name of the current common block. We get it from the BCOMM instead of the
4259 ECOMM to match IBM documentation (even though IBM puts the name both places
4260 like everyone else). */
4261 static char *common_block_name;
4263 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4264 to remain after this function returns. */
4267 common_block_start (char *name, struct objfile *objfile)
4269 if (common_block_name != NULL)
4271 complaint (&symfile_complaints,
4272 _("Invalid symbol data: common block within common block"));
4274 common_block = local_symbols;
4275 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4276 common_block_name = obsavestring (name, strlen (name),
4277 &objfile->objfile_obstack);
4280 /* Process a N_ECOMM symbol. */
4283 common_block_end (struct objfile *objfile)
4285 /* Symbols declared since the BCOMM are to have the common block
4286 start address added in when we know it. common_block and
4287 common_block_i point to the first symbol after the BCOMM in
4288 the local_symbols list; copy the list and hang it off the
4289 symbol for the common block name for later fixup. */
4292 struct pending *new = 0;
4293 struct pending *next;
4296 if (common_block_name == NULL)
4298 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4302 sym = (struct symbol *)
4303 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
4304 memset (sym, 0, sizeof (struct symbol));
4305 /* Note: common_block_name already saved on objfile_obstack */
4306 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4307 SYMBOL_CLASS (sym) = LOC_BLOCK;
4309 /* Now we copy all the symbols which have been defined since the BCOMM. */
4311 /* Copy all the struct pendings before common_block. */
4312 for (next = local_symbols;
4313 next != NULL && next != common_block;
4316 for (j = 0; j < next->nsyms; j++)
4317 add_symbol_to_list (next->symbol[j], &new);
4320 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4321 NULL, it means copy all the local symbols (which we already did
4324 if (common_block != NULL)
4325 for (j = common_block_i; j < common_block->nsyms; j++)
4326 add_symbol_to_list (common_block->symbol[j], &new);
4328 SYMBOL_TYPE (sym) = (struct type *) new;
4330 /* Should we be putting local_symbols back to what it was?
4333 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4334 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4335 global_sym_chain[i] = sym;
4336 common_block_name = NULL;
4339 /* Add a common block's start address to the offset of each symbol
4340 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4341 the common block name). */
4344 fix_common_block (struct symbol *sym, int valu)
4346 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4347 for (; next; next = next->next)
4350 for (j = next->nsyms - 1; j >= 0; j--)
4351 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4357 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4358 See add_undefined_type for more details. */
4361 add_undefined_type_noname (struct type *type, int typenums[2])
4365 nat.typenums[0] = typenums [0];
4366 nat.typenums[1] = typenums [1];
4369 if (noname_undefs_length == noname_undefs_allocated)
4371 noname_undefs_allocated *= 2;
4372 noname_undefs = (struct nat *)
4373 xrealloc ((char *) noname_undefs,
4374 noname_undefs_allocated * sizeof (struct nat));
4376 noname_undefs[noname_undefs_length++] = nat;
4379 /* Add TYPE to the UNDEF_TYPES vector.
4380 See add_undefined_type for more details. */
4383 add_undefined_type_1 (struct type *type)
4385 if (undef_types_length == undef_types_allocated)
4387 undef_types_allocated *= 2;
4388 undef_types = (struct type **)
4389 xrealloc ((char *) undef_types,
4390 undef_types_allocated * sizeof (struct type *));
4392 undef_types[undef_types_length++] = type;
4395 /* What about types defined as forward references inside of a small lexical
4397 /* Add a type to the list of undefined types to be checked through
4398 once this file has been read in.
4400 In practice, we actually maintain two such lists: The first list
4401 (UNDEF_TYPES) is used for types whose name has been provided, and
4402 concerns forward references (eg 'xs' or 'xu' forward references);
4403 the second list (NONAME_UNDEFS) is used for types whose name is
4404 unknown at creation time, because they were referenced through
4405 their type number before the actual type was declared.
4406 This function actually adds the given type to the proper list. */
4409 add_undefined_type (struct type *type, int typenums[2])
4411 if (TYPE_TAG_NAME (type) == NULL)
4412 add_undefined_type_noname (type, typenums);
4414 add_undefined_type_1 (type);
4417 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4420 cleanup_undefined_types_noname (struct objfile *objfile)
4424 for (i = 0; i < noname_undefs_length; i++)
4426 struct nat nat = noname_undefs[i];
4429 type = dbx_lookup_type (nat.typenums, objfile);
4430 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4432 /* The instance flags of the undefined type are still unset,
4433 and needs to be copied over from the reference type.
4434 Since replace_type expects them to be identical, we need
4435 to set these flags manually before hand. */
4436 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4437 replace_type (nat.type, *type);
4441 noname_undefs_length = 0;
4444 /* Go through each undefined type, see if it's still undefined, and fix it
4445 up if possible. We have two kinds of undefined types:
4447 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4448 Fix: update array length using the element bounds
4449 and the target type's length.
4450 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4451 yet defined at the time a pointer to it was made.
4452 Fix: Do a full lookup on the struct/union tag. */
4455 cleanup_undefined_types_1 (void)
4459 /* Iterate over every undefined type, and look for a symbol whose type
4460 matches our undefined type. The symbol matches if:
4461 1. It is a typedef in the STRUCT domain;
4462 2. It has the same name, and same type code;
4463 3. The instance flags are identical.
4465 It is important to check the instance flags, because we have seen
4466 examples where the debug info contained definitions such as:
4468 "foo_t:t30=B31=xefoo_t:"
4470 In this case, we have created an undefined type named "foo_t" whose
4471 instance flags is null (when processing "xefoo_t"), and then created
4472 another type with the same name, but with different instance flags
4473 ('B' means volatile). I think that the definition above is wrong,
4474 since the same type cannot be volatile and non-volatile at the same
4475 time, but we need to be able to cope with it when it happens. The
4476 approach taken here is to treat these two types as different. */
4478 for (type = undef_types; type < undef_types + undef_types_length; type++)
4480 switch (TYPE_CODE (*type))
4483 case TYPE_CODE_STRUCT:
4484 case TYPE_CODE_UNION:
4485 case TYPE_CODE_ENUM:
4487 /* Check if it has been defined since. Need to do this here
4488 as well as in check_typedef to deal with the (legitimate in
4489 C though not C++) case of several types with the same name
4490 in different source files. */
4491 if (TYPE_STUB (*type))
4493 struct pending *ppt;
4495 /* Name of the type, without "struct" or "union" */
4496 char *typename = TYPE_TAG_NAME (*type);
4498 if (typename == NULL)
4500 complaint (&symfile_complaints, _("need a type name"));
4503 for (ppt = file_symbols; ppt; ppt = ppt->next)
4505 for (i = 0; i < ppt->nsyms; i++)
4507 struct symbol *sym = ppt->symbol[i];
4509 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4510 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4511 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4513 && (TYPE_INSTANCE_FLAGS (*type) ==
4514 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4515 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4517 replace_type (*type, SYMBOL_TYPE (sym));
4526 complaint (&symfile_complaints,
4527 _("forward-referenced types left unresolved, "
4535 undef_types_length = 0;
4538 /* Try to fix all the undefined types we ecountered while processing
4542 cleanup_undefined_types (struct objfile *objfile)
4544 cleanup_undefined_types_1 ();
4545 cleanup_undefined_types_noname (objfile);
4548 /* Scan through all of the global symbols defined in the object file,
4549 assigning values to the debugging symbols that need to be assigned
4550 to. Get these symbols from the minimal symbol table. */
4553 scan_file_globals (struct objfile *objfile)
4556 struct minimal_symbol *msymbol;
4557 struct symbol *sym, *prev;
4558 struct objfile *resolve_objfile;
4560 /* SVR4 based linkers copy referenced global symbols from shared
4561 libraries to the main executable.
4562 If we are scanning the symbols for a shared library, try to resolve
4563 them from the minimal symbols of the main executable first. */
4565 if (symfile_objfile && objfile != symfile_objfile)
4566 resolve_objfile = symfile_objfile;
4568 resolve_objfile = objfile;
4572 /* Avoid expensive loop through all minimal symbols if there are
4573 no unresolved symbols. */
4574 for (hash = 0; hash < HASHSIZE; hash++)
4576 if (global_sym_chain[hash])
4579 if (hash >= HASHSIZE)
4582 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4586 /* Skip static symbols. */
4587 switch (MSYMBOL_TYPE (msymbol))
4599 /* Get the hash index and check all the symbols
4600 under that hash index. */
4602 hash = hashname (SYMBOL_LINKAGE_NAME (msymbol));
4604 for (sym = global_sym_chain[hash]; sym;)
4606 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol),
4607 SYMBOL_LINKAGE_NAME (sym)) == 0)
4609 /* Splice this symbol out of the hash chain and
4610 assign the value we have to it. */
4613 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4617 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4620 /* Check to see whether we need to fix up a common block. */
4621 /* Note: this code might be executed several times for
4622 the same symbol if there are multiple references. */
4625 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4627 fix_common_block (sym,
4628 SYMBOL_VALUE_ADDRESS (msymbol));
4632 SYMBOL_VALUE_ADDRESS (sym)
4633 = SYMBOL_VALUE_ADDRESS (msymbol);
4635 SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
4640 sym = SYMBOL_VALUE_CHAIN (prev);
4644 sym = global_sym_chain[hash];
4650 sym = SYMBOL_VALUE_CHAIN (sym);
4654 if (resolve_objfile == objfile)
4656 resolve_objfile = objfile;
4659 /* Change the storage class of any remaining unresolved globals to
4660 LOC_UNRESOLVED and remove them from the chain. */
4661 for (hash = 0; hash < HASHSIZE; hash++)
4663 sym = global_sym_chain[hash];
4667 sym = SYMBOL_VALUE_CHAIN (sym);
4669 /* Change the symbol address from the misleading chain value
4671 SYMBOL_VALUE_ADDRESS (prev) = 0;
4673 /* Complain about unresolved common block symbols. */
4674 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4675 SYMBOL_CLASS (prev) = LOC_UNRESOLVED;
4677 complaint (&symfile_complaints,
4678 _("%s: common block `%s' from global_sym_chain unresolved"),
4679 objfile->name, SYMBOL_PRINT_NAME (prev));
4682 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4685 /* Initialize anything that needs initializing when starting to read
4686 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4690 stabsread_init (void)
4694 /* Initialize anything that needs initializing when a completely new
4695 symbol file is specified (not just adding some symbols from another
4696 file, e.g. a shared library). */
4699 stabsread_new_init (void)
4701 /* Empty the hash table of global syms looking for values. */
4702 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4705 /* Initialize anything that needs initializing at the same time as
4706 start_symtab() is called. */
4711 global_stabs = NULL; /* AIX COFF */
4712 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4713 n_this_object_header_files = 1;
4714 type_vector_length = 0;
4715 type_vector = (struct type **) 0;
4717 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4718 common_block_name = NULL;
4721 /* Call after end_symtab() */
4728 xfree (type_vector);
4731 type_vector_length = 0;
4732 previous_stab_code = 0;
4736 finish_global_stabs (struct objfile *objfile)
4740 patch_block_stabs (global_symbols, global_stabs, objfile);
4741 xfree (global_stabs);
4742 global_stabs = NULL;
4746 /* Find the end of the name, delimited by a ':', but don't match
4747 ObjC symbols which look like -[Foo bar::]:bla. */
4749 find_name_end (char *name)
4752 if (s[0] == '-' || *s == '+')
4754 /* Must be an ObjC method symbol. */
4757 error (_("invalid symbol name \"%s\""), name);
4759 s = strchr (s, ']');
4762 error (_("invalid symbol name \"%s\""), name);
4764 return strchr (s, ':');
4768 return strchr (s, ':');
4772 /* Initializer for this module */
4775 _initialize_stabsread (void)
4777 rs6000_builtin_type_data = register_objfile_data ();
4779 undef_types_allocated = 20;
4780 undef_types_length = 0;
4781 undef_types = (struct type **)
4782 xmalloc (undef_types_allocated * sizeof (struct type *));
4784 noname_undefs_allocated = 20;
4785 noname_undefs_length = 0;
4786 noname_undefs = (struct nat *)
4787 xmalloc (noname_undefs_allocated * sizeof (struct nat));