1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used by some systems that use
22 COFF or ELF where the stabs data is placed in a special section (as
23 well as with many old systems that used the a.out object file
24 format). Avoid placing any object file format specific code in
29 #include "gdb_obstack.h"
32 #include "expression.h"
35 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
37 #include "aout/aout64.h"
38 #include "gdb-stabs.h"
39 #include "buildsym-legacy.h"
40 #include "complaints.h"
42 #include "gdb-demangle.h"
44 #include "target-float.h"
46 #include "cp-support.h"
50 /* Ask stabsread.h to define the vars it normally declares `extern'. */
53 #include "stabsread.h" /* Our own declarations */
58 struct nextfield *next;
60 /* This is the raw visibility from the stab. It is not checked
61 for being one of the visibilities we recognize, so code which
62 examines this field better be able to deal. */
68 struct next_fnfieldlist
70 struct next_fnfieldlist *next;
71 struct fn_fieldlist fn_fieldlist;
74 /* The routines that read and process a complete stabs for a C struct or
75 C++ class pass lists of data member fields and lists of member function
76 fields in an instance of a field_info structure, as defined below.
77 This is part of some reorganization of low level C++ support and is
78 expected to eventually go away... (FIXME) */
82 struct nextfield *list;
83 struct next_fnfieldlist *fnlist;
87 read_one_struct_field (struct field_info *, const char **, const char *,
88 struct type *, struct objfile *);
90 static struct type *dbx_alloc_type (int[2], struct objfile *);
92 static long read_huge_number (const char **, int, int *, int);
94 static struct type *error_type (const char **, struct objfile *);
97 patch_block_stabs (struct pending *, struct pending_stabs *,
100 static void fix_common_block (struct symbol *, CORE_ADDR);
102 static int read_type_number (const char **, int *);
104 static struct type *read_type (const char **, struct objfile *);
106 static struct type *read_range_type (const char **, int[2],
107 int, struct objfile *);
109 static struct type *read_sun_builtin_type (const char **,
110 int[2], struct objfile *);
112 static struct type *read_sun_floating_type (const char **, int[2],
115 static struct type *read_enum_type (const char **, struct type *, struct objfile *);
117 static struct type *rs6000_builtin_type (int, struct objfile *);
120 read_member_functions (struct field_info *, const char **, struct type *,
124 read_struct_fields (struct field_info *, const char **, struct type *,
128 read_baseclasses (struct field_info *, const char **, struct type *,
132 read_tilde_fields (struct field_info *, const 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 (const char **, struct type *,
144 static struct type *read_array_type (const char **, struct type *,
147 static struct field *read_args (const char **, int, struct objfile *,
150 static void add_undefined_type (struct type *, int[2]);
153 read_cpp_abbrev (struct field_info *, const char **, struct type *,
156 static const char *find_name_end (const char *name);
158 static int process_reference (const char **string);
160 void stabsread_clear_cache (void);
162 static const char vptr_name[] = "_vptr$";
163 static const char vb_name[] = "_vb$";
166 invalid_cpp_abbrev_complaint (const char *arg1)
168 complaint (_("invalid C++ abbreviation `%s'"), arg1);
172 reg_value_complaint (int regnum, int num_regs, const char *sym)
174 complaint (_("bad register number %d (max %d) in symbol %s"),
175 regnum, num_regs - 1, sym);
179 stabs_general_complaint (const char *arg1)
181 complaint ("%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); \
212 /* Vector of types defined so far, indexed by their type numbers.
213 (In newer sun systems, dbx uses a pair of numbers in parens,
214 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
215 Then these numbers must be translated through the type_translations
216 hash table to get the index into the type vector.) */
218 static struct type **type_vector;
220 /* Number of elements allocated for type_vector currently. */
222 static int type_vector_length;
224 /* Initial size of type vector. Is realloc'd larger if needed, and
225 realloc'd down to the size actually used, when completed. */
227 #define INITIAL_TYPE_VECTOR_LENGTH 160
230 /* Look up a dbx type-number pair. Return the address of the slot
231 where the type for that number-pair is stored.
232 The number-pair is in TYPENUMS.
234 This can be used for finding the type associated with that pair
235 or for associating a new type with the pair. */
237 static struct type **
238 dbx_lookup_type (int typenums[2], struct objfile *objfile)
240 int filenum = typenums[0];
241 int index = typenums[1];
244 struct header_file *f;
247 if (filenum == -1) /* -1,-1 is for temporary types. */
250 if (filenum < 0 || filenum >= n_this_object_header_files)
252 complaint (_("Invalid symbol data: type number "
253 "(%d,%d) out of range at symtab pos %d."),
254 filenum, index, symnum);
262 /* Caller wants address of address of type. We think
263 that negative (rs6k builtin) types will never appear as
264 "lvalues", (nor should they), so we stuff the real type
265 pointer into a temp, and return its address. If referenced,
266 this will do the right thing. */
267 static struct type *temp_type;
269 temp_type = rs6000_builtin_type (index, objfile);
273 /* Type is defined outside of header files.
274 Find it in this object file's type vector. */
275 if (index >= type_vector_length)
277 old_len = type_vector_length;
280 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
281 type_vector = XNEWVEC (struct type *, type_vector_length);
283 while (index >= type_vector_length)
285 type_vector_length *= 2;
287 type_vector = (struct type **)
288 xrealloc ((char *) type_vector,
289 (type_vector_length * sizeof (struct type *)));
290 memset (&type_vector[old_len], 0,
291 (type_vector_length - old_len) * sizeof (struct type *));
293 return (&type_vector[index]);
297 real_filenum = this_object_header_files[filenum];
299 if (real_filenum >= N_HEADER_FILES (objfile))
301 static struct type *temp_type;
303 warning (_("GDB internal error: bad real_filenum"));
306 temp_type = objfile_type (objfile)->builtin_error;
310 f = HEADER_FILES (objfile) + real_filenum;
312 f_orig_length = f->length;
313 if (index >= f_orig_length)
315 while (index >= f->length)
319 f->vector = (struct type **)
320 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
321 memset (&f->vector[f_orig_length], 0,
322 (f->length - f_orig_length) * sizeof (struct type *));
324 return (&f->vector[index]);
328 /* Make sure there is a type allocated for type numbers TYPENUMS
329 and return the type object.
330 This can create an empty (zeroed) type object.
331 TYPENUMS may be (-1, -1) to return a new type object that is not
332 put into the type vector, and so may not be referred to by number. */
335 dbx_alloc_type (int typenums[2], struct objfile *objfile)
337 struct type **type_addr;
339 if (typenums[0] == -1)
341 return (alloc_type (objfile));
344 type_addr = dbx_lookup_type (typenums, objfile);
346 /* If we are referring to a type not known at all yet,
347 allocate an empty type for it.
348 We will fill it in later if we find out how. */
351 *type_addr = alloc_type (objfile);
357 /* Allocate a floating-point type of size BITS. */
360 dbx_init_float_type (struct objfile *objfile, int bits)
362 struct gdbarch *gdbarch = get_objfile_arch (objfile);
363 const struct floatformat **format;
366 format = gdbarch_floatformat_for_type (gdbarch, NULL, bits);
368 type = init_float_type (objfile, bits, NULL, format);
370 type = init_type (objfile, TYPE_CODE_ERROR, bits, NULL);
375 /* for all the stabs in a given stab vector, build appropriate types
376 and fix their symbols in given symbol vector. */
379 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
380 struct objfile *objfile)
389 /* for all the stab entries, find their corresponding symbols and
390 patch their types! */
392 for (ii = 0; ii < stabs->count; ++ii)
394 name = stabs->stab[ii];
395 pp = (char *) strchr (name, ':');
396 gdb_assert (pp); /* Must find a ':' or game's over. */
400 pp = (char *) strchr (pp, ':');
402 sym = find_symbol_in_list (symbols, name, pp - name);
405 /* FIXME-maybe: it would be nice if we noticed whether
406 the variable was defined *anywhere*, not just whether
407 it is defined in this compilation unit. But neither
408 xlc or GCC seem to need such a definition, and until
409 we do psymtabs (so that the minimal symbols from all
410 compilation units are available now), I'm not sure
411 how to get the information. */
413 /* On xcoff, if a global is defined and never referenced,
414 ld will remove it from the executable. There is then
415 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
416 sym = allocate_symbol (objfile);
417 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
418 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
419 SYMBOL_SET_LINKAGE_NAME
420 (sym, (char *) obstack_copy0 (&objfile->objfile_obstack,
423 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
425 /* I don't think the linker does this with functions,
426 so as far as I know this is never executed.
427 But it doesn't hurt to check. */
429 lookup_function_type (read_type (&pp, objfile));
433 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
435 add_symbol_to_list (sym, get_global_symbols ());
440 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
443 lookup_function_type (read_type (&pp, objfile));
447 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
455 /* Read a number by which a type is referred to in dbx data,
456 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
457 Just a single number N is equivalent to (0,N).
458 Return the two numbers by storing them in the vector TYPENUMS.
459 TYPENUMS will then be used as an argument to dbx_lookup_type.
461 Returns 0 for success, -1 for error. */
464 read_type_number (const char **pp, int *typenums)
471 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
474 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
481 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
489 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
490 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
491 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
492 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
494 /* Structure for storing pointers to reference definitions for fast lookup
495 during "process_later". */
504 #define MAX_CHUNK_REFS 100
505 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
506 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
508 static struct ref_map *ref_map;
510 /* Ptr to free cell in chunk's linked list. */
511 static int ref_count = 0;
513 /* Number of chunks malloced. */
514 static int ref_chunk = 0;
516 /* This file maintains a cache of stabs aliases found in the symbol
517 table. If the symbol table changes, this cache must be cleared
518 or we are left holding onto data in invalid obstacks. */
520 stabsread_clear_cache (void)
526 /* Create array of pointers mapping refids to symbols and stab strings.
527 Add pointers to reference definition symbols and/or their values as we
528 find them, using their reference numbers as our index.
529 These will be used later when we resolve references. */
531 ref_add (int refnum, struct symbol *sym, const char *stabs, CORE_ADDR value)
535 if (refnum >= ref_count)
536 ref_count = refnum + 1;
537 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
539 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
540 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
542 ref_map = (struct ref_map *)
543 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
544 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
545 new_chunks * REF_CHUNK_SIZE);
546 ref_chunk += new_chunks;
548 ref_map[refnum].stabs = stabs;
549 ref_map[refnum].sym = sym;
550 ref_map[refnum].value = value;
553 /* Return defined sym for the reference REFNUM. */
555 ref_search (int refnum)
557 if (refnum < 0 || refnum > ref_count)
559 return ref_map[refnum].sym;
562 /* Parse a reference id in STRING and return the resulting
563 reference number. Move STRING beyond the reference id. */
566 process_reference (const char **string)
574 /* Advance beyond the initial '#'. */
577 /* Read number as reference id. */
578 while (*p && isdigit (*p))
580 refnum = refnum * 10 + *p - '0';
587 /* If STRING defines a reference, store away a pointer to the reference
588 definition for later use. Return the reference number. */
591 symbol_reference_defined (const char **string)
593 const char *p = *string;
596 refnum = process_reference (&p);
598 /* Defining symbols end in '='. */
601 /* Symbol is being defined here. */
607 /* Must be a reference. Either the symbol has already been defined,
608 or this is a forward reference to it. */
615 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
617 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
620 || regno >= (gdbarch_num_regs (gdbarch)
621 + gdbarch_num_pseudo_regs (gdbarch)))
623 reg_value_complaint (regno,
624 gdbarch_num_regs (gdbarch)
625 + gdbarch_num_pseudo_regs (gdbarch),
626 SYMBOL_PRINT_NAME (sym));
628 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless. */
634 static const struct symbol_register_ops stab_register_funcs = {
638 /* The "aclass" indices for computed symbols. */
640 static int stab_register_index;
641 static int stab_regparm_index;
644 define_symbol (CORE_ADDR valu, const char *string, int desc, int type,
645 struct objfile *objfile)
647 struct gdbarch *gdbarch = get_objfile_arch (objfile);
649 const char *p = find_name_end (string);
654 /* We would like to eliminate nameless symbols, but keep their types.
655 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
656 to type 2, but, should not create a symbol to address that type. Since
657 the symbol will be nameless, there is no way any user can refer to it. */
661 /* Ignore syms with empty names. */
665 /* Ignore old-style symbols from cc -go. */
676 _("Bad stabs string '%s'"), string);
681 /* If a nameless stab entry, all we need is the type, not the symbol.
682 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
683 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
685 current_symbol = sym = allocate_symbol (objfile);
687 if (processing_gcc_compilation)
689 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
690 number of bytes occupied by a type or object, which we ignore. */
691 SYMBOL_LINE (sym) = desc;
695 SYMBOL_LINE (sym) = 0; /* unknown */
698 SYMBOL_SET_LANGUAGE (sym, get_current_subfile ()->language,
699 &objfile->objfile_obstack);
701 if (is_cplus_marker (string[0]))
703 /* Special GNU C++ names. */
707 SYMBOL_SET_LINKAGE_NAME (sym, "this");
710 case 'v': /* $vtbl_ptr_type */
714 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
718 /* This was an anonymous type that was never fixed up. */
722 /* SunPRO (3.0 at least) static variable encoding. */
723 if (gdbarch_static_transform_name_p (gdbarch))
728 complaint (_("Unknown C++ symbol name `%s'"),
730 goto normal; /* Do *something* with it. */
736 std::string new_name;
738 if (SYMBOL_LANGUAGE (sym) == language_cplus)
740 char *name = (char *) alloca (p - string + 1);
742 memcpy (name, string, p - string);
743 name[p - string] = '\0';
744 new_name = cp_canonicalize_string (name);
746 if (!new_name.empty ())
748 SYMBOL_SET_NAMES (sym,
749 new_name.c_str (), new_name.length (),
753 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
755 if (SYMBOL_LANGUAGE (sym) == language_cplus)
756 cp_scan_for_anonymous_namespaces (sym, objfile);
761 /* Determine the type of name being defined. */
763 /* Getting GDB to correctly skip the symbol on an undefined symbol
764 descriptor and not ever dump core is a very dodgy proposition if
765 we do things this way. I say the acorn RISC machine can just
766 fix their compiler. */
767 /* The Acorn RISC machine's compiler can put out locals that don't
768 start with "234=" or "(3,4)=", so assume anything other than the
769 deftypes we know how to handle is a local. */
770 if (!strchr ("cfFGpPrStTvVXCR", *p))
772 if (isdigit (*p) || *p == '(' || *p == '-')
781 /* c is a special case, not followed by a type-number.
782 SYMBOL:c=iVALUE for an integer constant symbol.
783 SYMBOL:c=rVALUE for a floating constant symbol.
784 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
785 e.g. "b:c=e6,0" for "const b = blob1"
786 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
789 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
790 SYMBOL_TYPE (sym) = error_type (&p, objfile);
791 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
792 add_symbol_to_list (sym, get_file_symbols ());
801 struct type *dbl_type;
803 dbl_type = objfile_type (objfile)->builtin_double;
805 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack,
806 TYPE_LENGTH (dbl_type));
808 target_float_from_string (dbl_valu, dbl_type, std::string (p));
810 SYMBOL_TYPE (sym) = dbl_type;
811 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
812 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
817 /* Defining integer constants this way is kind of silly,
818 since 'e' constants allows the compiler to give not
819 only the value, but the type as well. C has at least
820 int, long, unsigned int, and long long as constant
821 types; other languages probably should have at least
822 unsigned as well as signed constants. */
824 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
825 SYMBOL_VALUE (sym) = atoi (p);
826 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
832 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
833 SYMBOL_VALUE (sym) = atoi (p);
834 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
840 struct type *range_type;
843 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
844 gdb_byte *string_value;
846 if (quote != '\'' && quote != '"')
848 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
849 SYMBOL_TYPE (sym) = error_type (&p, objfile);
850 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
851 add_symbol_to_list (sym, get_file_symbols ());
855 /* Find matching quote, rejecting escaped quotes. */
856 while (*p && *p != quote)
858 if (*p == '\\' && p[1] == quote)
860 string_local[ind] = (gdb_byte) quote;
866 string_local[ind] = (gdb_byte) (*p);
873 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
874 SYMBOL_TYPE (sym) = error_type (&p, objfile);
875 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
876 add_symbol_to_list (sym, get_file_symbols ());
880 /* NULL terminate the string. */
881 string_local[ind] = 0;
883 = create_static_range_type (NULL,
884 objfile_type (objfile)->builtin_int,
886 SYMBOL_TYPE (sym) = create_array_type (NULL,
887 objfile_type (objfile)->builtin_char,
890 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, ind + 1);
891 memcpy (string_value, string_local, ind + 1);
894 SYMBOL_VALUE_BYTES (sym) = string_value;
895 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
900 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
901 can be represented as integral.
902 e.g. "b:c=e6,0" for "const b = blob1"
903 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
905 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
906 SYMBOL_TYPE (sym) = read_type (&p, objfile);
910 SYMBOL_TYPE (sym) = error_type (&p, objfile);
915 /* If the value is too big to fit in an int (perhaps because
916 it is unsigned), or something like that, we silently get
917 a bogus value. The type and everything else about it is
918 correct. Ideally, we should be using whatever we have
919 available for parsing unsigned and long long values,
921 SYMBOL_VALUE (sym) = atoi (p);
926 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
927 SYMBOL_TYPE (sym) = error_type (&p, objfile);
930 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
931 add_symbol_to_list (sym, get_file_symbols ());
935 /* The name of a caught exception. */
936 SYMBOL_TYPE (sym) = read_type (&p, objfile);
937 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
938 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
939 SYMBOL_VALUE_ADDRESS (sym) = valu;
940 add_symbol_to_list (sym, get_local_symbols ());
944 /* A static function definition. */
945 SYMBOL_TYPE (sym) = read_type (&p, objfile);
946 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
947 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
948 add_symbol_to_list (sym, get_file_symbols ());
949 /* fall into process_function_types. */
951 process_function_types:
952 /* Function result types are described as the result type in stabs.
953 We need to convert this to the function-returning-type-X type
954 in GDB. E.g. "int" is converted to "function returning int". */
955 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
956 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
958 /* All functions in C++ have prototypes. Stabs does not offer an
959 explicit way to identify prototyped or unprototyped functions,
960 but both GCC and Sun CC emit stabs for the "call-as" type rather
961 than the "declared-as" type for unprototyped functions, so
962 we treat all functions as if they were prototyped. This is used
963 primarily for promotion when calling the function from GDB. */
964 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
966 /* fall into process_prototype_types. */
968 process_prototype_types:
969 /* Sun acc puts declared types of arguments here. */
972 struct type *ftype = SYMBOL_TYPE (sym);
977 /* Obtain a worst case guess for the number of arguments
978 by counting the semicolons. */
985 /* Allocate parameter information fields and fill them in. */
986 TYPE_FIELDS (ftype) = (struct field *)
987 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
992 /* A type number of zero indicates the start of varargs.
993 FIXME: GDB currently ignores vararg functions. */
994 if (p[0] == '0' && p[1] == '\0')
996 ptype = read_type (&p, objfile);
998 /* The Sun compilers mark integer arguments, which should
999 be promoted to the width of the calling conventions, with
1000 a type which references itself. This type is turned into
1001 a TYPE_CODE_VOID type by read_type, and we have to turn
1002 it back into builtin_int here.
1003 FIXME: Do we need a new builtin_promoted_int_arg ? */
1004 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
1005 ptype = objfile_type (objfile)->builtin_int;
1006 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
1007 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
1009 TYPE_NFIELDS (ftype) = nparams;
1010 TYPE_PROTOTYPED (ftype) = 1;
1015 /* A global function definition. */
1016 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1017 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1018 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1019 add_symbol_to_list (sym, get_global_symbols ());
1020 goto process_function_types;
1023 /* For a class G (global) symbol, it appears that the
1024 value is not correct. It is necessary to search for the
1025 corresponding linker definition to find the value.
1026 These definitions appear at the end of the namelist. */
1027 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1028 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1029 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1030 /* Don't add symbol references to global_sym_chain.
1031 Symbol references don't have valid names and wont't match up with
1032 minimal symbols when the global_sym_chain is relocated.
1033 We'll fixup symbol references when we fixup the defining symbol. */
1034 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1036 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1037 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1038 global_sym_chain[i] = sym;
1040 add_symbol_to_list (sym, get_global_symbols ());
1043 /* This case is faked by a conditional above,
1044 when there is no code letter in the dbx data.
1045 Dbx data never actually contains 'l'. */
1048 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1049 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1050 SYMBOL_VALUE (sym) = valu;
1051 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1052 add_symbol_to_list (sym, get_local_symbols ());
1057 /* pF is a two-letter code that means a function parameter in Fortran.
1058 The type-number specifies the type of the return value.
1059 Translate it into a pointer-to-function type. */
1063 = lookup_pointer_type
1064 (lookup_function_type (read_type (&p, objfile)));
1067 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1069 SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
1070 SYMBOL_VALUE (sym) = valu;
1071 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1072 SYMBOL_IS_ARGUMENT (sym) = 1;
1073 add_symbol_to_list (sym, get_local_symbols ());
1075 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1077 /* On little-endian machines, this crud is never necessary,
1078 and, if the extra bytes contain garbage, is harmful. */
1082 /* If it's gcc-compiled, if it says `short', believe it. */
1083 if (processing_gcc_compilation
1084 || gdbarch_believe_pcc_promotion (gdbarch))
1087 if (!gdbarch_believe_pcc_promotion (gdbarch))
1089 /* If PCC says a parameter is a short or a char, it is
1091 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1092 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1093 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1096 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1097 ? objfile_type (objfile)->builtin_unsigned_int
1098 : objfile_type (objfile)->builtin_int;
1105 /* acc seems to use P to declare the prototypes of functions that
1106 are referenced by this file. gdb is not prepared to deal
1107 with this extra information. FIXME, it ought to. */
1110 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1111 goto process_prototype_types;
1116 /* Parameter which is in a register. */
1117 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1118 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1119 SYMBOL_IS_ARGUMENT (sym) = 1;
1120 SYMBOL_VALUE (sym) = valu;
1121 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1122 add_symbol_to_list (sym, get_local_symbols ());
1126 /* Register variable (either global or local). */
1127 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1128 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1129 SYMBOL_VALUE (sym) = valu;
1130 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1131 if (within_function)
1133 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1134 the same name to represent an argument passed in a
1135 register. GCC uses 'P' for the same case. So if we find
1136 such a symbol pair we combine it into one 'P' symbol.
1137 For Sun cc we need to do this regardless of
1138 stabs_argument_has_addr, because the compiler puts out
1139 the 'p' symbol even if it never saves the argument onto
1142 On most machines, we want to preserve both symbols, so
1143 that we can still get information about what is going on
1144 with the stack (VAX for computing args_printed, using
1145 stack slots instead of saved registers in backtraces,
1148 Note that this code illegally combines
1149 main(argc) struct foo argc; { register struct foo argc; }
1150 but this case is considered pathological and causes a warning
1151 from a decent compiler. */
1153 struct pending *local_symbols = *get_local_symbols ();
1155 && local_symbols->nsyms > 0
1156 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1158 struct symbol *prev_sym;
1160 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1161 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1162 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1163 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1164 SYMBOL_LINKAGE_NAME (sym)) == 0)
1166 SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
1167 /* Use the type from the LOC_REGISTER; that is the type
1168 that is actually in that register. */
1169 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1170 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1175 add_symbol_to_list (sym, get_local_symbols ());
1178 add_symbol_to_list (sym, get_file_symbols ());
1182 /* Static symbol at top level of file. */
1183 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1184 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1185 SYMBOL_VALUE_ADDRESS (sym) = valu;
1186 if (gdbarch_static_transform_name_p (gdbarch)
1187 && gdbarch_static_transform_name (gdbarch,
1188 SYMBOL_LINKAGE_NAME (sym))
1189 != SYMBOL_LINKAGE_NAME (sym))
1191 struct bound_minimal_symbol msym;
1193 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1195 if (msym.minsym != NULL)
1197 const char *new_name = gdbarch_static_transform_name
1198 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1200 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1201 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1204 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1205 add_symbol_to_list (sym, get_file_symbols ());
1209 /* In Ada, there is no distinction between typedef and non-typedef;
1210 any type declaration implicitly has the equivalent of a typedef,
1211 and thus 't' is in fact equivalent to 'Tt'.
1213 Therefore, for Ada units, we check the character immediately
1214 before the 't', and if we do not find a 'T', then make sure to
1215 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1216 will be stored in the VAR_DOMAIN). If the symbol was indeed
1217 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1218 elsewhere, so we don't need to take care of that.
1220 This is important to do, because of forward references:
1221 The cleanup of undefined types stored in undef_types only uses
1222 STRUCT_DOMAIN symbols to perform the replacement. */
1223 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1226 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1228 /* For a nameless type, we don't want a create a symbol, thus we
1229 did not use `sym'. Return without further processing. */
1233 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1234 SYMBOL_VALUE (sym) = valu;
1235 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1236 /* C++ vagaries: we may have a type which is derived from
1237 a base type which did not have its name defined when the
1238 derived class was output. We fill in the derived class's
1239 base part member's name here in that case. */
1240 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1241 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1242 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1243 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1247 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1248 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1249 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1250 TYPE_NAME (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1253 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1255 /* gcc-2.6 or later (when using -fvtable-thunks)
1256 emits a unique named type for a vtable entry.
1257 Some gdb code depends on that specific name. */
1258 extern const char vtbl_ptr_name[];
1260 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1261 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1262 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1264 /* If we are giving a name to a type such as "pointer to
1265 foo" or "function returning foo", we better not set
1266 the TYPE_NAME. If the program contains "typedef char
1267 *caddr_t;", we don't want all variables of type char
1268 * to print as caddr_t. This is not just a
1269 consequence of GDB's type management; PCC and GCC (at
1270 least through version 2.4) both output variables of
1271 either type char * or caddr_t with the type number
1272 defined in the 't' symbol for caddr_t. If a future
1273 compiler cleans this up it GDB is not ready for it
1274 yet, but if it becomes ready we somehow need to
1275 disable this check (without breaking the PCC/GCC2.4
1280 Fortunately, this check seems not to be necessary
1281 for anything except pointers or functions. */
1282 /* ezannoni: 2000-10-26. This seems to apply for
1283 versions of gcc older than 2.8. This was the original
1284 problem: with the following code gdb would tell that
1285 the type for name1 is caddr_t, and func is char().
1287 typedef char *caddr_t;
1299 /* Pascal accepts names for pointer types. */
1300 if (get_current_subfile ()->language == language_pascal)
1302 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1306 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1309 add_symbol_to_list (sym, get_file_symbols ());
1313 /* Create the STRUCT_DOMAIN clone. */
1314 struct symbol *struct_sym = allocate_symbol (objfile);
1317 SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
1318 SYMBOL_VALUE (struct_sym) = valu;
1319 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1320 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1321 TYPE_NAME (SYMBOL_TYPE (sym))
1322 = obconcat (&objfile->objfile_obstack,
1323 SYMBOL_LINKAGE_NAME (sym),
1325 add_symbol_to_list (struct_sym, get_file_symbols ());
1331 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1332 by 't' which means we are typedef'ing it as well. */
1333 synonym = *p == 't';
1338 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1340 /* For a nameless type, we don't want a create a symbol, thus we
1341 did not use `sym'. Return without further processing. */
1345 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1346 SYMBOL_VALUE (sym) = valu;
1347 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1348 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1349 TYPE_NAME (SYMBOL_TYPE (sym))
1350 = obconcat (&objfile->objfile_obstack,
1351 SYMBOL_LINKAGE_NAME (sym),
1353 add_symbol_to_list (sym, get_file_symbols ());
1357 /* Clone the sym and then modify it. */
1358 struct symbol *typedef_sym = allocate_symbol (objfile);
1360 *typedef_sym = *sym;
1361 SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
1362 SYMBOL_VALUE (typedef_sym) = valu;
1363 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1364 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1365 TYPE_NAME (SYMBOL_TYPE (sym))
1366 = obconcat (&objfile->objfile_obstack,
1367 SYMBOL_LINKAGE_NAME (sym),
1369 add_symbol_to_list (typedef_sym, get_file_symbols ());
1374 /* Static symbol of local scope. */
1375 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1376 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1377 SYMBOL_VALUE_ADDRESS (sym) = valu;
1378 if (gdbarch_static_transform_name_p (gdbarch)
1379 && gdbarch_static_transform_name (gdbarch,
1380 SYMBOL_LINKAGE_NAME (sym))
1381 != SYMBOL_LINKAGE_NAME (sym))
1383 struct bound_minimal_symbol msym;
1385 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1387 if (msym.minsym != NULL)
1389 const char *new_name = gdbarch_static_transform_name
1390 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1392 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1393 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1396 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1397 add_symbol_to_list (sym, get_local_symbols ());
1401 /* Reference parameter */
1402 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1403 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1404 SYMBOL_IS_ARGUMENT (sym) = 1;
1405 SYMBOL_VALUE (sym) = valu;
1406 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1407 add_symbol_to_list (sym, get_local_symbols ());
1411 /* Reference parameter which is in a register. */
1412 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1413 SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
1414 SYMBOL_IS_ARGUMENT (sym) = 1;
1415 SYMBOL_VALUE (sym) = valu;
1416 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1417 add_symbol_to_list (sym, get_local_symbols ());
1421 /* This is used by Sun FORTRAN for "function result value".
1422 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1423 that Pascal uses it too, but when I tried it Pascal used
1424 "x:3" (local symbol) instead. */
1425 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1426 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1427 SYMBOL_VALUE (sym) = valu;
1428 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1429 add_symbol_to_list (sym, get_local_symbols ());
1433 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1434 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
1435 SYMBOL_VALUE (sym) = 0;
1436 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1437 add_symbol_to_list (sym, get_file_symbols ());
1441 /* Some systems pass variables of certain types by reference instead
1442 of by value, i.e. they will pass the address of a structure (in a
1443 register or on the stack) instead of the structure itself. */
1445 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1446 && SYMBOL_IS_ARGUMENT (sym))
1448 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1449 variables passed in a register). */
1450 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1451 SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
1452 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1453 and subsequent arguments on SPARC, for example). */
1454 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1455 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1461 /* Skip rest of this symbol and return an error type.
1463 General notes on error recovery: error_type always skips to the
1464 end of the symbol (modulo cretinous dbx symbol name continuation).
1465 Thus code like this:
1467 if (*(*pp)++ != ';')
1468 return error_type (pp, objfile);
1470 is wrong because if *pp starts out pointing at '\0' (typically as the
1471 result of an earlier error), it will be incremented to point to the
1472 start of the next symbol, which might produce strange results, at least
1473 if you run off the end of the string table. Instead use
1476 return error_type (pp, objfile);
1482 foo = error_type (pp, objfile);
1486 And in case it isn't obvious, the point of all this hair is so the compiler
1487 can define new types and new syntaxes, and old versions of the
1488 debugger will be able to read the new symbol tables. */
1490 static struct type *
1491 error_type (const char **pp, struct objfile *objfile)
1493 complaint (_("couldn't parse type; debugger out of date?"));
1496 /* Skip to end of symbol. */
1497 while (**pp != '\0')
1502 /* Check for and handle cretinous dbx symbol name continuation! */
1503 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1505 *pp = next_symbol_text (objfile);
1512 return objfile_type (objfile)->builtin_error;
1516 /* Read type information or a type definition; return the type. Even
1517 though this routine accepts either type information or a type
1518 definition, the distinction is relevant--some parts of stabsread.c
1519 assume that type information starts with a digit, '-', or '(' in
1520 deciding whether to call read_type. */
1522 static struct type *
1523 read_type (const char **pp, struct objfile *objfile)
1525 struct type *type = 0;
1528 char type_descriptor;
1530 /* Size in bits of type if specified by a type attribute, or -1 if
1531 there is no size attribute. */
1534 /* Used to distinguish string and bitstring from char-array and set. */
1537 /* Used to distinguish vector from array. */
1540 /* Read type number if present. The type number may be omitted.
1541 for instance in a two-dimensional array declared with type
1542 "ar1;1;10;ar1;1;10;4". */
1543 if ((**pp >= '0' && **pp <= '9')
1547 if (read_type_number (pp, typenums) != 0)
1548 return error_type (pp, objfile);
1552 /* Type is not being defined here. Either it already
1553 exists, or this is a forward reference to it.
1554 dbx_alloc_type handles both cases. */
1555 type = dbx_alloc_type (typenums, objfile);
1557 /* If this is a forward reference, arrange to complain if it
1558 doesn't get patched up by the time we're done
1560 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1561 add_undefined_type (type, typenums);
1566 /* Type is being defined here. */
1568 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1573 /* 'typenums=' not present, type is anonymous. Read and return
1574 the definition, but don't put it in the type vector. */
1575 typenums[0] = typenums[1] = -1;
1580 type_descriptor = (*pp)[-1];
1581 switch (type_descriptor)
1585 enum type_code code;
1587 /* Used to index through file_symbols. */
1588 struct pending *ppt;
1591 /* Name including "struct", etc. */
1595 const char *from, *p, *q1, *q2;
1597 /* Set the type code according to the following letter. */
1601 code = TYPE_CODE_STRUCT;
1604 code = TYPE_CODE_UNION;
1607 code = TYPE_CODE_ENUM;
1611 /* Complain and keep going, so compilers can invent new
1612 cross-reference types. */
1613 complaint (_("Unrecognized cross-reference type `%c'"),
1615 code = TYPE_CODE_STRUCT;
1620 q1 = strchr (*pp, '<');
1621 p = strchr (*pp, ':');
1623 return error_type (pp, objfile);
1624 if (q1 && p > q1 && p[1] == ':')
1626 int nesting_level = 0;
1628 for (q2 = q1; *q2; q2++)
1632 else if (*q2 == '>')
1634 else if (*q2 == ':' && nesting_level == 0)
1639 return error_type (pp, objfile);
1642 if (get_current_subfile ()->language == language_cplus)
1644 char *name = (char *) alloca (p - *pp + 1);
1646 memcpy (name, *pp, p - *pp);
1647 name[p - *pp] = '\0';
1649 std::string new_name = cp_canonicalize_string (name);
1650 if (!new_name.empty ())
1653 = (char *) obstack_copy0 (&objfile->objfile_obstack,
1655 new_name.length ());
1658 if (type_name == NULL)
1660 char *to = type_name = (char *)
1661 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1663 /* Copy the name. */
1670 /* Set the pointer ahead of the name which we just read, and
1675 /* If this type has already been declared, then reuse the same
1676 type, rather than allocating a new one. This saves some
1679 for (ppt = *get_file_symbols (); ppt; ppt = ppt->next)
1680 for (i = 0; i < ppt->nsyms; i++)
1682 struct symbol *sym = ppt->symbol[i];
1684 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1685 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1686 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1687 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1689 obstack_free (&objfile->objfile_obstack, type_name);
1690 type = SYMBOL_TYPE (sym);
1691 if (typenums[0] != -1)
1692 *dbx_lookup_type (typenums, objfile) = type;
1697 /* Didn't find the type to which this refers, so we must
1698 be dealing with a forward reference. Allocate a type
1699 structure for it, and keep track of it so we can
1700 fill in the rest of the fields when we get the full
1702 type = dbx_alloc_type (typenums, objfile);
1703 TYPE_CODE (type) = code;
1704 TYPE_NAME (type) = type_name;
1705 INIT_CPLUS_SPECIFIC (type);
1706 TYPE_STUB (type) = 1;
1708 add_undefined_type (type, typenums);
1712 case '-': /* RS/6000 built-in type */
1726 /* We deal with something like t(1,2)=(3,4)=... which
1727 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1729 /* Allocate and enter the typedef type first.
1730 This handles recursive types. */
1731 type = dbx_alloc_type (typenums, objfile);
1732 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1734 struct type *xtype = read_type (pp, objfile);
1738 /* It's being defined as itself. That means it is "void". */
1739 TYPE_CODE (type) = TYPE_CODE_VOID;
1740 TYPE_LENGTH (type) = 1;
1742 else if (type_size >= 0 || is_string)
1744 /* This is the absolute wrong way to construct types. Every
1745 other debug format has found a way around this problem and
1746 the related problems with unnecessarily stubbed types;
1747 someone motivated should attempt to clean up the issue
1748 here as well. Once a type pointed to has been created it
1749 should not be modified.
1751 Well, it's not *absolutely* wrong. Constructing recursive
1752 types (trees, linked lists) necessarily entails modifying
1753 types after creating them. Constructing any loop structure
1754 entails side effects. The Dwarf 2 reader does handle this
1755 more gracefully (it never constructs more than once
1756 instance of a type object, so it doesn't have to copy type
1757 objects wholesale), but it still mutates type objects after
1758 other folks have references to them.
1760 Keep in mind that this circularity/mutation issue shows up
1761 at the source language level, too: C's "incomplete types",
1762 for example. So the proper cleanup, I think, would be to
1763 limit GDB's type smashing to match exactly those required
1764 by the source language. So GDB could have a
1765 "complete_this_type" function, but never create unnecessary
1766 copies of a type otherwise. */
1767 replace_type (type, xtype);
1768 TYPE_NAME (type) = NULL;
1772 TYPE_TARGET_STUB (type) = 1;
1773 TYPE_TARGET_TYPE (type) = xtype;
1778 /* In the following types, we must be sure to overwrite any existing
1779 type that the typenums refer to, rather than allocating a new one
1780 and making the typenums point to the new one. This is because there
1781 may already be pointers to the existing type (if it had been
1782 forward-referenced), and we must change it to a pointer, function,
1783 reference, or whatever, *in-place*. */
1785 case '*': /* Pointer to another type */
1786 type1 = read_type (pp, objfile);
1787 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1790 case '&': /* Reference to another type */
1791 type1 = read_type (pp, objfile);
1792 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile),
1796 case 'f': /* Function returning another type */
1797 type1 = read_type (pp, objfile);
1798 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1801 case 'g': /* Prototyped function. (Sun) */
1803 /* Unresolved questions:
1805 - According to Sun's ``STABS Interface Manual'', for 'f'
1806 and 'F' symbol descriptors, a `0' in the argument type list
1807 indicates a varargs function. But it doesn't say how 'g'
1808 type descriptors represent that info. Someone with access
1809 to Sun's toolchain should try it out.
1811 - According to the comment in define_symbol (search for
1812 `process_prototype_types:'), Sun emits integer arguments as
1813 types which ref themselves --- like `void' types. Do we
1814 have to deal with that here, too? Again, someone with
1815 access to Sun's toolchain should try it out and let us
1818 const char *type_start = (*pp) - 1;
1819 struct type *return_type = read_type (pp, objfile);
1820 struct type *func_type
1821 = make_function_type (return_type,
1822 dbx_lookup_type (typenums, objfile));
1825 struct type_list *next;
1829 while (**pp && **pp != '#')
1831 struct type *arg_type = read_type (pp, objfile);
1832 struct type_list *newobj = XALLOCA (struct type_list);
1833 newobj->type = arg_type;
1834 newobj->next = arg_types;
1842 complaint (_("Prototyped function type didn't "
1843 "end arguments with `#':\n%s"),
1847 /* If there is just one argument whose type is `void', then
1848 that's just an empty argument list. */
1850 && ! arg_types->next
1851 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1854 TYPE_FIELDS (func_type)
1855 = (struct field *) TYPE_ALLOC (func_type,
1856 num_args * sizeof (struct field));
1857 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1860 struct type_list *t;
1862 /* We stuck each argument type onto the front of the list
1863 when we read it, so the list is reversed. Build the
1864 fields array right-to-left. */
1865 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1866 TYPE_FIELD_TYPE (func_type, i) = t->type;
1868 TYPE_NFIELDS (func_type) = num_args;
1869 TYPE_PROTOTYPED (func_type) = 1;
1875 case 'k': /* Const qualifier on some type (Sun) */
1876 type = read_type (pp, objfile);
1877 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1878 dbx_lookup_type (typenums, objfile));
1881 case 'B': /* Volatile qual on some type (Sun) */
1882 type = read_type (pp, objfile);
1883 type = make_cv_type (TYPE_CONST (type), 1, type,
1884 dbx_lookup_type (typenums, objfile));
1888 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1889 { /* Member (class & variable) type */
1890 /* FIXME -- we should be doing smash_to_XXX types here. */
1892 struct type *domain = read_type (pp, objfile);
1893 struct type *memtype;
1896 /* Invalid member type data format. */
1897 return error_type (pp, objfile);
1900 memtype = read_type (pp, objfile);
1901 type = dbx_alloc_type (typenums, objfile);
1902 smash_to_memberptr_type (type, domain, memtype);
1905 /* type attribute */
1907 const char *attr = *pp;
1909 /* Skip to the semicolon. */
1910 while (**pp != ';' && **pp != '\0')
1913 return error_type (pp, objfile);
1915 ++ * pp; /* Skip the semicolon. */
1919 case 's': /* Size attribute */
1920 type_size = atoi (attr + 1);
1925 case 'S': /* String attribute */
1926 /* FIXME: check to see if following type is array? */
1930 case 'V': /* Vector attribute */
1931 /* FIXME: check to see if following type is array? */
1936 /* Ignore unrecognized type attributes, so future compilers
1937 can invent new ones. */
1945 case '#': /* Method (class & fn) type */
1946 if ((*pp)[0] == '#')
1948 /* We'll get the parameter types from the name. */
1949 struct type *return_type;
1952 return_type = read_type (pp, objfile);
1953 if (*(*pp)++ != ';')
1954 complaint (_("invalid (minimal) member type "
1955 "data format at symtab pos %d."),
1957 type = allocate_stub_method (return_type);
1958 if (typenums[0] != -1)
1959 *dbx_lookup_type (typenums, objfile) = type;
1963 struct type *domain = read_type (pp, objfile);
1964 struct type *return_type;
1969 /* Invalid member type data format. */
1970 return error_type (pp, objfile);
1974 return_type = read_type (pp, objfile);
1975 args = read_args (pp, ';', objfile, &nargs, &varargs);
1977 return error_type (pp, objfile);
1978 type = dbx_alloc_type (typenums, objfile);
1979 smash_to_method_type (type, domain, return_type, args,
1984 case 'r': /* Range type */
1985 type = read_range_type (pp, typenums, type_size, objfile);
1986 if (typenums[0] != -1)
1987 *dbx_lookup_type (typenums, objfile) = type;
1992 /* Sun ACC builtin int type */
1993 type = read_sun_builtin_type (pp, typenums, objfile);
1994 if (typenums[0] != -1)
1995 *dbx_lookup_type (typenums, objfile) = type;
1999 case 'R': /* Sun ACC builtin float type */
2000 type = read_sun_floating_type (pp, typenums, objfile);
2001 if (typenums[0] != -1)
2002 *dbx_lookup_type (typenums, objfile) = type;
2005 case 'e': /* Enumeration type */
2006 type = dbx_alloc_type (typenums, objfile);
2007 type = read_enum_type (pp, type, objfile);
2008 if (typenums[0] != -1)
2009 *dbx_lookup_type (typenums, objfile) = type;
2012 case 's': /* Struct type */
2013 case 'u': /* Union type */
2015 enum type_code type_code = TYPE_CODE_UNDEF;
2016 type = dbx_alloc_type (typenums, objfile);
2017 switch (type_descriptor)
2020 type_code = TYPE_CODE_STRUCT;
2023 type_code = TYPE_CODE_UNION;
2026 type = read_struct_type (pp, type, type_code, objfile);
2030 case 'a': /* Array type */
2032 return error_type (pp, objfile);
2035 type = dbx_alloc_type (typenums, objfile);
2036 type = read_array_type (pp, type, objfile);
2038 TYPE_CODE (type) = TYPE_CODE_STRING;
2040 make_vector_type (type);
2043 case 'S': /* Set type */
2044 type1 = read_type (pp, objfile);
2045 type = create_set_type ((struct type *) NULL, type1);
2046 if (typenums[0] != -1)
2047 *dbx_lookup_type (typenums, objfile) = type;
2051 --*pp; /* Go back to the symbol in error. */
2052 /* Particularly important if it was \0! */
2053 return error_type (pp, objfile);
2058 warning (_("GDB internal error, type is NULL in stabsread.c."));
2059 return error_type (pp, objfile);
2062 /* Size specified in a type attribute overrides any other size. */
2063 if (type_size != -1)
2064 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2069 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2070 Return the proper type node for a given builtin type number. */
2072 static const struct objfile_data *rs6000_builtin_type_data;
2074 static struct type *
2075 rs6000_builtin_type (int typenum, struct objfile *objfile)
2077 struct type **negative_types
2078 = (struct type **) objfile_data (objfile, rs6000_builtin_type_data);
2080 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2081 #define NUMBER_RECOGNIZED 34
2082 struct type *rettype = NULL;
2084 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2086 complaint (_("Unknown builtin type %d"), typenum);
2087 return objfile_type (objfile)->builtin_error;
2090 if (!negative_types)
2092 /* This includes an empty slot for type number -0. */
2093 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2094 NUMBER_RECOGNIZED + 1, struct type *);
2095 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2098 if (negative_types[-typenum] != NULL)
2099 return negative_types[-typenum];
2101 #if TARGET_CHAR_BIT != 8
2102 #error This code wrong for TARGET_CHAR_BIT not 8
2103 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2104 that if that ever becomes not true, the correct fix will be to
2105 make the size in the struct type to be in bits, not in units of
2112 /* The size of this and all the other types are fixed, defined
2113 by the debugging format. If there is a type called "int" which
2114 is other than 32 bits, then it should use a new negative type
2115 number (or avoid negative type numbers for that case).
2116 See stabs.texinfo. */
2117 rettype = init_integer_type (objfile, 32, 0, "int");
2120 rettype = init_integer_type (objfile, 8, 0, "char");
2121 TYPE_NOSIGN (rettype) = 1;
2124 rettype = init_integer_type (objfile, 16, 0, "short");
2127 rettype = init_integer_type (objfile, 32, 0, "long");
2130 rettype = init_integer_type (objfile, 8, 1, "unsigned char");
2133 rettype = init_integer_type (objfile, 8, 0, "signed char");
2136 rettype = init_integer_type (objfile, 16, 1, "unsigned short");
2139 rettype = init_integer_type (objfile, 32, 1, "unsigned int");
2142 rettype = init_integer_type (objfile, 32, 1, "unsigned");
2145 rettype = init_integer_type (objfile, 32, 1, "unsigned long");
2148 rettype = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, "void");
2151 /* IEEE single precision (32 bit). */
2152 rettype = init_float_type (objfile, 32, "float",
2153 floatformats_ieee_single);
2156 /* IEEE double precision (64 bit). */
2157 rettype = init_float_type (objfile, 64, "double",
2158 floatformats_ieee_double);
2161 /* This is an IEEE double on the RS/6000, and different machines with
2162 different sizes for "long double" should use different negative
2163 type numbers. See stabs.texinfo. */
2164 rettype = init_float_type (objfile, 64, "long double",
2165 floatformats_ieee_double);
2168 rettype = init_integer_type (objfile, 32, 0, "integer");
2171 rettype = init_boolean_type (objfile, 32, 1, "boolean");
2174 rettype = init_float_type (objfile, 32, "short real",
2175 floatformats_ieee_single);
2178 rettype = init_float_type (objfile, 64, "real",
2179 floatformats_ieee_double);
2182 rettype = init_type (objfile, TYPE_CODE_ERROR, 0, "stringptr");
2185 rettype = init_character_type (objfile, 8, 1, "character");
2188 rettype = init_boolean_type (objfile, 8, 1, "logical*1");
2191 rettype = init_boolean_type (objfile, 16, 1, "logical*2");
2194 rettype = init_boolean_type (objfile, 32, 1, "logical*4");
2197 rettype = init_boolean_type (objfile, 32, 1, "logical");
2200 /* Complex type consisting of two IEEE single precision values. */
2201 rettype = init_complex_type (objfile, "complex",
2202 rs6000_builtin_type (12, objfile));
2205 /* Complex type consisting of two IEEE double precision values. */
2206 rettype = init_complex_type (objfile, "double complex",
2207 rs6000_builtin_type (13, objfile));
2210 rettype = init_integer_type (objfile, 8, 0, "integer*1");
2213 rettype = init_integer_type (objfile, 16, 0, "integer*2");
2216 rettype = init_integer_type (objfile, 32, 0, "integer*4");
2219 rettype = init_character_type (objfile, 16, 0, "wchar");
2222 rettype = init_integer_type (objfile, 64, 0, "long long");
2225 rettype = init_integer_type (objfile, 64, 1, "unsigned long long");
2228 rettype = init_integer_type (objfile, 64, 1, "logical*8");
2231 rettype = init_integer_type (objfile, 64, 0, "integer*8");
2234 negative_types[-typenum] = rettype;
2238 /* This page contains subroutines of read_type. */
2240 /* Wrapper around method_name_from_physname to flag a complaint
2241 if there is an error. */
2244 stabs_method_name_from_physname (const char *physname)
2248 method_name = method_name_from_physname (physname);
2250 if (method_name == NULL)
2252 complaint (_("Method has bad physname %s\n"), physname);
2259 /* Read member function stabs info for C++ classes. The form of each member
2262 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2264 An example with two member functions is:
2266 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2268 For the case of overloaded operators, the format is op$::*.funcs, where
2269 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2270 name (such as `+=') and `.' marks the end of the operator name.
2272 Returns 1 for success, 0 for failure. */
2275 read_member_functions (struct field_info *fip, const char **pp,
2276 struct type *type, struct objfile *objfile)
2283 struct next_fnfield *next;
2284 struct fn_field fn_field;
2287 struct type *look_ahead_type;
2288 struct next_fnfieldlist *new_fnlist;
2289 struct next_fnfield *new_sublist;
2293 /* Process each list until we find something that is not a member function
2294 or find the end of the functions. */
2298 /* We should be positioned at the start of the function name.
2299 Scan forward to find the first ':' and if it is not the
2300 first of a "::" delimiter, then this is not a member function. */
2312 look_ahead_type = NULL;
2315 new_fnlist = XCNEW (struct next_fnfieldlist);
2316 make_cleanup (xfree, new_fnlist);
2318 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2320 /* This is a completely wierd case. In order to stuff in the
2321 names that might contain colons (the usual name delimiter),
2322 Mike Tiemann defined a different name format which is
2323 signalled if the identifier is "op$". In that case, the
2324 format is "op$::XXXX." where XXXX is the name. This is
2325 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2326 /* This lets the user type "break operator+".
2327 We could just put in "+" as the name, but that wouldn't
2329 static char opname[32] = "op$";
2330 char *o = opname + 3;
2332 /* Skip past '::'. */
2335 STABS_CONTINUE (pp, objfile);
2341 main_fn_name = savestring (opname, o - opname);
2347 main_fn_name = savestring (*pp, p - *pp);
2348 /* Skip past '::'. */
2351 new_fnlist->fn_fieldlist.name = main_fn_name;
2355 new_sublist = XCNEW (struct next_fnfield);
2356 make_cleanup (xfree, new_sublist);
2358 /* Check for and handle cretinous dbx symbol name continuation! */
2359 if (look_ahead_type == NULL)
2362 STABS_CONTINUE (pp, objfile);
2364 new_sublist->fn_field.type = read_type (pp, objfile);
2367 /* Invalid symtab info for member function. */
2373 /* g++ version 1 kludge */
2374 new_sublist->fn_field.type = look_ahead_type;
2375 look_ahead_type = NULL;
2385 /* These are methods, not functions. */
2386 if (TYPE_CODE (new_sublist->fn_field.type) == TYPE_CODE_FUNC)
2387 TYPE_CODE (new_sublist->fn_field.type) = TYPE_CODE_METHOD;
2389 gdb_assert (TYPE_CODE (new_sublist->fn_field.type)
2390 == TYPE_CODE_METHOD);
2392 /* If this is just a stub, then we don't have the real name here. */
2393 if (TYPE_STUB (new_sublist->fn_field.type))
2395 if (!TYPE_SELF_TYPE (new_sublist->fn_field.type))
2396 set_type_self_type (new_sublist->fn_field.type, type);
2397 new_sublist->fn_field.is_stub = 1;
2400 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2403 /* Set this member function's visibility fields. */
2406 case VISIBILITY_PRIVATE:
2407 new_sublist->fn_field.is_private = 1;
2409 case VISIBILITY_PROTECTED:
2410 new_sublist->fn_field.is_protected = 1;
2414 STABS_CONTINUE (pp, objfile);
2417 case 'A': /* Normal functions. */
2418 new_sublist->fn_field.is_const = 0;
2419 new_sublist->fn_field.is_volatile = 0;
2422 case 'B': /* `const' member functions. */
2423 new_sublist->fn_field.is_const = 1;
2424 new_sublist->fn_field.is_volatile = 0;
2427 case 'C': /* `volatile' member function. */
2428 new_sublist->fn_field.is_const = 0;
2429 new_sublist->fn_field.is_volatile = 1;
2432 case 'D': /* `const volatile' member function. */
2433 new_sublist->fn_field.is_const = 1;
2434 new_sublist->fn_field.is_volatile = 1;
2437 case '*': /* File compiled with g++ version 1 --
2443 complaint (_("const/volatile indicator missing, got '%c'"),
2453 /* virtual member function, followed by index.
2454 The sign bit is set to distinguish pointers-to-methods
2455 from virtual function indicies. Since the array is
2456 in words, the quantity must be shifted left by 1
2457 on 16 bit machine, and by 2 on 32 bit machine, forcing
2458 the sign bit out, and usable as a valid index into
2459 the array. Remove the sign bit here. */
2460 new_sublist->fn_field.voffset =
2461 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2465 STABS_CONTINUE (pp, objfile);
2466 if (**pp == ';' || **pp == '\0')
2468 /* Must be g++ version 1. */
2469 new_sublist->fn_field.fcontext = 0;
2473 /* Figure out from whence this virtual function came.
2474 It may belong to virtual function table of
2475 one of its baseclasses. */
2476 look_ahead_type = read_type (pp, objfile);
2479 /* g++ version 1 overloaded methods. */
2483 new_sublist->fn_field.fcontext = look_ahead_type;
2492 look_ahead_type = NULL;
2498 /* static member function. */
2500 int slen = strlen (main_fn_name);
2502 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2504 /* For static member functions, we can't tell if they
2505 are stubbed, as they are put out as functions, and not as
2507 GCC v2 emits the fully mangled name if
2508 dbxout.c:flag_minimal_debug is not set, so we have to
2509 detect a fully mangled physname here and set is_stub
2510 accordingly. Fully mangled physnames in v2 start with
2511 the member function name, followed by two underscores.
2512 GCC v3 currently always emits stubbed member functions,
2513 but with fully mangled physnames, which start with _Z. */
2514 if (!(strncmp (new_sublist->fn_field.physname,
2515 main_fn_name, slen) == 0
2516 && new_sublist->fn_field.physname[slen] == '_'
2517 && new_sublist->fn_field.physname[slen + 1] == '_'))
2519 new_sublist->fn_field.is_stub = 1;
2526 complaint (_("member function type missing, got '%c'"),
2528 /* Normal member function. */
2532 /* normal member function. */
2533 new_sublist->fn_field.voffset = 0;
2534 new_sublist->fn_field.fcontext = 0;
2538 new_sublist->next = sublist;
2539 sublist = new_sublist;
2541 STABS_CONTINUE (pp, objfile);
2543 while (**pp != ';' && **pp != '\0');
2546 STABS_CONTINUE (pp, objfile);
2548 /* Skip GCC 3.X member functions which are duplicates of the callable
2549 constructor/destructor. */
2550 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2551 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2552 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2554 xfree (main_fn_name);
2559 int has_destructor = 0, has_other = 0;
2561 struct next_fnfield *tmp_sublist;
2563 /* Various versions of GCC emit various mostly-useless
2564 strings in the name field for special member functions.
2566 For stub methods, we need to defer correcting the name
2567 until we are ready to unstub the method, because the current
2568 name string is used by gdb_mangle_name. The only stub methods
2569 of concern here are GNU v2 operators; other methods have their
2570 names correct (see caveat below).
2572 For non-stub methods, in GNU v3, we have a complete physname.
2573 Therefore we can safely correct the name now. This primarily
2574 affects constructors and destructors, whose name will be
2575 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2576 operators will also have incorrect names; for instance,
2577 "operator int" will be named "operator i" (i.e. the type is
2580 For non-stub methods in GNU v2, we have no easy way to
2581 know if we have a complete physname or not. For most
2582 methods the result depends on the platform (if CPLUS_MARKER
2583 can be `$' or `.', it will use minimal debug information, or
2584 otherwise the full physname will be included).
2586 Rather than dealing with this, we take a different approach.
2587 For v3 mangled names, we can use the full physname; for v2,
2588 we use cplus_demangle_opname (which is actually v2 specific),
2589 because the only interesting names are all operators - once again
2590 barring the caveat below. Skip this process if any method in the
2591 group is a stub, to prevent our fouling up the workings of
2594 The caveat: GCC 2.95.x (and earlier?) put constructors and
2595 destructors in the same method group. We need to split this
2596 into two groups, because they should have different names.
2597 So for each method group we check whether it contains both
2598 routines whose physname appears to be a destructor (the physnames
2599 for and destructors are always provided, due to quirks in v2
2600 mangling) and routines whose physname does not appear to be a
2601 destructor. If so then we break up the list into two halves.
2602 Even if the constructors and destructors aren't in the same group
2603 the destructor will still lack the leading tilde, so that also
2606 So, to summarize what we expect and handle here:
2608 Given Given Real Real Action
2609 method name physname physname method name
2611 __opi [none] __opi__3Foo operator int opname
2613 Foo _._3Foo _._3Foo ~Foo separate and
2615 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2616 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2619 tmp_sublist = sublist;
2620 while (tmp_sublist != NULL)
2622 if (tmp_sublist->fn_field.is_stub)
2624 if (tmp_sublist->fn_field.physname[0] == '_'
2625 && tmp_sublist->fn_field.physname[1] == 'Z')
2628 if (is_destructor_name (tmp_sublist->fn_field.physname))
2633 tmp_sublist = tmp_sublist->next;
2636 if (has_destructor && has_other)
2638 struct next_fnfieldlist *destr_fnlist;
2639 struct next_fnfield *last_sublist;
2641 /* Create a new fn_fieldlist for the destructors. */
2643 destr_fnlist = XCNEW (struct next_fnfieldlist);
2644 make_cleanup (xfree, destr_fnlist);
2646 destr_fnlist->fn_fieldlist.name
2647 = obconcat (&objfile->objfile_obstack, "~",
2648 new_fnlist->fn_fieldlist.name, (char *) NULL);
2650 destr_fnlist->fn_fieldlist.fn_fields =
2651 XOBNEWVEC (&objfile->objfile_obstack,
2652 struct fn_field, has_destructor);
2653 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2654 sizeof (struct fn_field) * has_destructor);
2655 tmp_sublist = sublist;
2656 last_sublist = NULL;
2658 while (tmp_sublist != NULL)
2660 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2662 tmp_sublist = tmp_sublist->next;
2666 destr_fnlist->fn_fieldlist.fn_fields[i++]
2667 = tmp_sublist->fn_field;
2669 last_sublist->next = tmp_sublist->next;
2671 sublist = tmp_sublist->next;
2672 last_sublist = tmp_sublist;
2673 tmp_sublist = tmp_sublist->next;
2676 destr_fnlist->fn_fieldlist.length = has_destructor;
2677 destr_fnlist->next = fip->fnlist;
2678 fip->fnlist = destr_fnlist;
2680 length -= has_destructor;
2684 /* v3 mangling prevents the use of abbreviated physnames,
2685 so we can do this here. There are stubbed methods in v3
2687 - in -gstabs instead of -gstabs+
2688 - or for static methods, which are output as a function type
2689 instead of a method type. */
2690 char *new_method_name =
2691 stabs_method_name_from_physname (sublist->fn_field.physname);
2693 if (new_method_name != NULL
2694 && strcmp (new_method_name,
2695 new_fnlist->fn_fieldlist.name) != 0)
2697 new_fnlist->fn_fieldlist.name = new_method_name;
2698 xfree (main_fn_name);
2701 xfree (new_method_name);
2703 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2705 new_fnlist->fn_fieldlist.name =
2706 obconcat (&objfile->objfile_obstack,
2707 "~", main_fn_name, (char *)NULL);
2708 xfree (main_fn_name);
2712 char dem_opname[256];
2715 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2716 dem_opname, DMGL_ANSI);
2718 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2721 new_fnlist->fn_fieldlist.name
2723 obstack_copy0 (&objfile->objfile_obstack, dem_opname,
2724 strlen (dem_opname)));
2725 xfree (main_fn_name);
2728 new_fnlist->fn_fieldlist.fn_fields
2729 = OBSTACK_CALLOC (&objfile->objfile_obstack, length, fn_field);
2730 for (i = length; (i--, sublist); sublist = sublist->next)
2732 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2735 new_fnlist->fn_fieldlist.length = length;
2736 new_fnlist->next = fip->fnlist;
2737 fip->fnlist = new_fnlist;
2744 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2745 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2746 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2747 memset (TYPE_FN_FIELDLISTS (type), 0,
2748 sizeof (struct fn_fieldlist) * nfn_fields);
2749 TYPE_NFN_FIELDS (type) = nfn_fields;
2755 /* Special GNU C++ name.
2757 Returns 1 for success, 0 for failure. "failure" means that we can't
2758 keep parsing and it's time for error_type(). */
2761 read_cpp_abbrev (struct field_info *fip, const char **pp, struct type *type,
2762 struct objfile *objfile)
2767 struct type *context;
2777 /* At this point, *pp points to something like "22:23=*22...",
2778 where the type number before the ':' is the "context" and
2779 everything after is a regular type definition. Lookup the
2780 type, find it's name, and construct the field name. */
2782 context = read_type (pp, objfile);
2786 case 'f': /* $vf -- a virtual function table pointer */
2787 name = TYPE_NAME (context);
2792 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2793 vptr_name, name, (char *) NULL);
2796 case 'b': /* $vb -- a virtual bsomethingorother */
2797 name = TYPE_NAME (context);
2800 complaint (_("C++ abbreviated type name "
2801 "unknown at symtab pos %d"),
2805 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2806 name, (char *) NULL);
2810 invalid_cpp_abbrev_complaint (*pp);
2811 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2812 "INVALID_CPLUSPLUS_ABBREV",
2817 /* At this point, *pp points to the ':'. Skip it and read the
2823 invalid_cpp_abbrev_complaint (*pp);
2826 fip->list->field.type = read_type (pp, objfile);
2828 (*pp)++; /* Skip the comma. */
2835 SET_FIELD_BITPOS (fip->list->field,
2836 read_huge_number (pp, ';', &nbits, 0));
2840 /* This field is unpacked. */
2841 FIELD_BITSIZE (fip->list->field) = 0;
2842 fip->list->visibility = VISIBILITY_PRIVATE;
2846 invalid_cpp_abbrev_complaint (*pp);
2847 /* We have no idea what syntax an unrecognized abbrev would have, so
2848 better return 0. If we returned 1, we would need to at least advance
2849 *pp to avoid an infinite loop. */
2856 read_one_struct_field (struct field_info *fip, const char **pp, const char *p,
2857 struct type *type, struct objfile *objfile)
2859 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2861 fip->list->field.name
2862 = (const char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
2865 /* This means we have a visibility for a field coming. */
2869 fip->list->visibility = *(*pp)++;
2873 /* normal dbx-style format, no explicit visibility */
2874 fip->list->visibility = VISIBILITY_PUBLIC;
2877 fip->list->field.type = read_type (pp, objfile);
2882 /* Possible future hook for nested types. */
2885 fip->list->field.bitpos = (long) -2; /* nested type */
2895 /* Static class member. */
2896 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2900 else if (**pp != ',')
2902 /* Bad structure-type format. */
2903 stabs_general_complaint ("bad structure-type format");
2907 (*pp)++; /* Skip the comma. */
2912 SET_FIELD_BITPOS (fip->list->field,
2913 read_huge_number (pp, ',', &nbits, 0));
2916 stabs_general_complaint ("bad structure-type format");
2919 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2922 stabs_general_complaint ("bad structure-type format");
2927 if (FIELD_BITPOS (fip->list->field) == 0
2928 && FIELD_BITSIZE (fip->list->field) == 0)
2930 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2931 it is a field which has been optimized out. The correct stab for
2932 this case is to use VISIBILITY_IGNORE, but that is a recent
2933 invention. (2) It is a 0-size array. For example
2934 union { int num; char str[0]; } foo. Printing _("<no value>" for
2935 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2936 will continue to work, and a 0-size array as a whole doesn't
2937 have any contents to print.
2939 I suspect this probably could also happen with gcc -gstabs (not
2940 -gstabs+) for static fields, and perhaps other C++ extensions.
2941 Hopefully few people use -gstabs with gdb, since it is intended
2942 for dbx compatibility. */
2944 /* Ignore this field. */
2945 fip->list->visibility = VISIBILITY_IGNORE;
2949 /* Detect an unpacked field and mark it as such.
2950 dbx gives a bit size for all fields.
2951 Note that forward refs cannot be packed,
2952 and treat enums as if they had the width of ints. */
2954 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2956 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2957 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2958 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2959 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2961 FIELD_BITSIZE (fip->list->field) = 0;
2963 if ((FIELD_BITSIZE (fip->list->field)
2964 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2965 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2966 && FIELD_BITSIZE (fip->list->field)
2967 == gdbarch_int_bit (gdbarch))
2970 FIELD_BITPOS (fip->list->field) % 8 == 0)
2972 FIELD_BITSIZE (fip->list->field) = 0;
2978 /* Read struct or class data fields. They have the form:
2980 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2982 At the end, we see a semicolon instead of a field.
2984 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2987 The optional VISIBILITY is one of:
2989 '/0' (VISIBILITY_PRIVATE)
2990 '/1' (VISIBILITY_PROTECTED)
2991 '/2' (VISIBILITY_PUBLIC)
2992 '/9' (VISIBILITY_IGNORE)
2994 or nothing, for C style fields with public visibility.
2996 Returns 1 for success, 0 for failure. */
2999 read_struct_fields (struct field_info *fip, const char **pp, struct type *type,
3000 struct objfile *objfile)
3003 struct nextfield *newobj;
3005 /* We better set p right now, in case there are no fields at all... */
3009 /* Read each data member type until we find the terminating ';' at the end of
3010 the data member list, or break for some other reason such as finding the
3011 start of the member function list. */
3012 /* Stab string for structure/union does not end with two ';' in
3013 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3015 while (**pp != ';' && **pp != '\0')
3017 STABS_CONTINUE (pp, objfile);
3018 /* Get space to record the next field's data. */
3019 newobj = XCNEW (struct nextfield);
3020 make_cleanup (xfree, newobj);
3022 newobj->next = fip->list;
3025 /* Get the field name. */
3028 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3029 unless the CPLUS_MARKER is followed by an underscore, in
3030 which case it is just the name of an anonymous type, which we
3031 should handle like any other type name. */
3033 if (is_cplus_marker (p[0]) && p[1] != '_')
3035 if (!read_cpp_abbrev (fip, pp, type, objfile))
3040 /* Look for the ':' that separates the field name from the field
3041 values. Data members are delimited by a single ':', while member
3042 functions are delimited by a pair of ':'s. When we hit the member
3043 functions (if any), terminate scan loop and return. */
3045 while (*p != ':' && *p != '\0')
3052 /* Check to see if we have hit the member functions yet. */
3057 read_one_struct_field (fip, pp, p, type, objfile);
3059 if (p[0] == ':' && p[1] == ':')
3061 /* (the deleted) chill the list of fields: the last entry (at
3062 the head) is a partially constructed entry which we now
3064 fip->list = fip->list->next;
3069 /* The stabs for C++ derived classes contain baseclass information which
3070 is marked by a '!' character after the total size. This function is
3071 called when we encounter the baseclass marker, and slurps up all the
3072 baseclass information.
3074 Immediately following the '!' marker is the number of base classes that
3075 the class is derived from, followed by information for each base class.
3076 For each base class, there are two visibility specifiers, a bit offset
3077 to the base class information within the derived class, a reference to
3078 the type for the base class, and a terminating semicolon.
3080 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3082 Baseclass information marker __________________|| | | | | | |
3083 Number of baseclasses __________________________| | | | | | |
3084 Visibility specifiers (2) ________________________| | | | | |
3085 Offset in bits from start of class _________________| | | | |
3086 Type number for base class ___________________________| | | |
3087 Visibility specifiers (2) _______________________________| | |
3088 Offset in bits from start of class ________________________| |
3089 Type number of base class ____________________________________|
3091 Return 1 for success, 0 for (error-type-inducing) failure. */
3097 read_baseclasses (struct field_info *fip, const char **pp, struct type *type,
3098 struct objfile *objfile)
3101 struct nextfield *newobj;
3109 /* Skip the '!' baseclass information marker. */
3113 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3117 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3123 /* Some stupid compilers have trouble with the following, so break
3124 it up into simpler expressions. */
3125 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3126 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3129 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3132 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3133 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3137 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3139 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3141 newobj = XCNEW (struct nextfield);
3142 make_cleanup (xfree, newobj);
3144 newobj->next = fip->list;
3146 FIELD_BITSIZE (newobj->field) = 0; /* This should be an unpacked
3149 STABS_CONTINUE (pp, objfile);
3153 /* Nothing to do. */
3156 SET_TYPE_FIELD_VIRTUAL (type, i);
3159 /* Unknown character. Complain and treat it as non-virtual. */
3161 complaint (_("Unknown virtual character `%c' for baseclass"),
3167 newobj->visibility = *(*pp)++;
3168 switch (newobj->visibility)
3170 case VISIBILITY_PRIVATE:
3171 case VISIBILITY_PROTECTED:
3172 case VISIBILITY_PUBLIC:
3175 /* Bad visibility format. Complain and treat it as
3178 complaint (_("Unknown visibility `%c' for baseclass"),
3179 newobj->visibility);
3180 newobj->visibility = VISIBILITY_PUBLIC;
3187 /* The remaining value is the bit offset of the portion of the object
3188 corresponding to this baseclass. Always zero in the absence of
3189 multiple inheritance. */
3191 SET_FIELD_BITPOS (newobj->field, read_huge_number (pp, ',', &nbits, 0));
3196 /* The last piece of baseclass information is the type of the
3197 base class. Read it, and remember it's type name as this
3200 newobj->field.type = read_type (pp, objfile);
3201 newobj->field.name = TYPE_NAME (newobj->field.type);
3203 /* Skip trailing ';' and bump count of number of fields seen. */
3212 /* The tail end of stabs for C++ classes that contain a virtual function
3213 pointer contains a tilde, a %, and a type number.
3214 The type number refers to the base class (possibly this class itself) which
3215 contains the vtable pointer for the current class.
3217 This function is called when we have parsed all the method declarations,
3218 so we can look for the vptr base class info. */
3221 read_tilde_fields (struct field_info *fip, const char **pp, struct type *type,
3222 struct objfile *objfile)
3226 STABS_CONTINUE (pp, objfile);
3228 /* If we are positioned at a ';', then skip it. */
3238 if (**pp == '=' || **pp == '+' || **pp == '-')
3240 /* Obsolete flags that used to indicate the presence
3241 of constructors and/or destructors. */
3245 /* Read either a '%' or the final ';'. */
3246 if (*(*pp)++ == '%')
3248 /* The next number is the type number of the base class
3249 (possibly our own class) which supplies the vtable for
3250 this class. Parse it out, and search that class to find
3251 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3252 and TYPE_VPTR_FIELDNO. */
3257 t = read_type (pp, objfile);
3259 while (*p != '\0' && *p != ';')
3265 /* Premature end of symbol. */
3269 set_type_vptr_basetype (type, t);
3270 if (type == t) /* Our own class provides vtbl ptr. */
3272 for (i = TYPE_NFIELDS (t) - 1;
3273 i >= TYPE_N_BASECLASSES (t);
3276 const char *name = TYPE_FIELD_NAME (t, i);
3278 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3279 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3281 set_type_vptr_fieldno (type, i);
3285 /* Virtual function table field not found. */
3286 complaint (_("virtual function table pointer "
3287 "not found when defining class `%s'"),
3293 set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t));
3304 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3308 for (n = TYPE_NFN_FIELDS (type);
3309 fip->fnlist != NULL;
3310 fip->fnlist = fip->fnlist->next)
3312 --n; /* Circumvent Sun3 compiler bug. */
3313 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3318 /* Create the vector of fields, and record how big it is.
3319 We need this info to record proper virtual function table information
3320 for this class's virtual functions. */
3323 attach_fields_to_type (struct field_info *fip, struct type *type,
3324 struct objfile *objfile)
3327 int non_public_fields = 0;
3328 struct nextfield *scan;
3330 /* Count up the number of fields that we have, as well as taking note of
3331 whether or not there are any non-public fields, which requires us to
3332 allocate and build the private_field_bits and protected_field_bits
3335 for (scan = fip->list; scan != NULL; scan = scan->next)
3338 if (scan->visibility != VISIBILITY_PUBLIC)
3340 non_public_fields++;
3344 /* Now we know how many fields there are, and whether or not there are any
3345 non-public fields. Record the field count, allocate space for the
3346 array of fields, and create blank visibility bitfields if necessary. */
3348 TYPE_NFIELDS (type) = nfields;
3349 TYPE_FIELDS (type) = (struct field *)
3350 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3351 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3353 if (non_public_fields)
3355 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3357 TYPE_FIELD_PRIVATE_BITS (type) =
3358 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3359 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3361 TYPE_FIELD_PROTECTED_BITS (type) =
3362 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3363 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3365 TYPE_FIELD_IGNORE_BITS (type) =
3366 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3367 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3370 /* Copy the saved-up fields into the field vector. Start from the
3371 head of the list, adding to the tail of the field array, so that
3372 they end up in the same order in the array in which they were
3373 added to the list. */
3375 while (nfields-- > 0)
3377 TYPE_FIELD (type, nfields) = fip->list->field;
3378 switch (fip->list->visibility)
3380 case VISIBILITY_PRIVATE:
3381 SET_TYPE_FIELD_PRIVATE (type, nfields);
3384 case VISIBILITY_PROTECTED:
3385 SET_TYPE_FIELD_PROTECTED (type, nfields);
3388 case VISIBILITY_IGNORE:
3389 SET_TYPE_FIELD_IGNORE (type, nfields);
3392 case VISIBILITY_PUBLIC:
3396 /* Unknown visibility. Complain and treat it as public. */
3398 complaint (_("Unknown visibility `%c' for field"),
3399 fip->list->visibility);
3403 fip->list = fip->list->next;
3409 /* Complain that the compiler has emitted more than one definition for the
3410 structure type TYPE. */
3412 complain_about_struct_wipeout (struct type *type)
3414 const char *name = "";
3415 const char *kind = "";
3417 if (TYPE_NAME (type))
3419 name = TYPE_NAME (type);
3420 switch (TYPE_CODE (type))
3422 case TYPE_CODE_STRUCT: kind = "struct "; break;
3423 case TYPE_CODE_UNION: kind = "union "; break;
3424 case TYPE_CODE_ENUM: kind = "enum "; break;
3434 complaint (_("struct/union type gets multiply defined: %s%s"), kind, name);
3437 /* Set the length for all variants of a same main_type, which are
3438 connected in the closed chain.
3440 This is something that needs to be done when a type is defined *after*
3441 some cross references to this type have already been read. Consider
3442 for instance the following scenario where we have the following two
3445 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3446 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3448 A stubbed version of type dummy is created while processing the first
3449 stabs entry. The length of that type is initially set to zero, since
3450 it is unknown at this point. Also, a "constant" variation of type
3451 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3454 The second stabs entry allows us to replace the stubbed definition
3455 with the real definition. However, we still need to adjust the length
3456 of the "constant" variation of that type, as its length was left
3457 untouched during the main type replacement... */
3460 set_length_in_type_chain (struct type *type)
3462 struct type *ntype = TYPE_CHAIN (type);
3464 while (ntype != type)
3466 if (TYPE_LENGTH(ntype) == 0)
3467 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3469 complain_about_struct_wipeout (ntype);
3470 ntype = TYPE_CHAIN (ntype);
3474 /* Read the description of a structure (or union type) and return an object
3475 describing the type.
3477 PP points to a character pointer that points to the next unconsumed token
3478 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3479 *PP will point to "4a:1,0,32;;".
3481 TYPE points to an incomplete type that needs to be filled in.
3483 OBJFILE points to the current objfile from which the stabs information is
3484 being read. (Note that it is redundant in that TYPE also contains a pointer
3485 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3488 static struct type *
3489 read_struct_type (const char **pp, struct type *type, enum type_code type_code,
3490 struct objfile *objfile)
3492 struct cleanup *back_to;
3493 struct field_info fi;
3498 /* When describing struct/union/class types in stabs, G++ always drops
3499 all qualifications from the name. So if you've got:
3500 struct A { ... struct B { ... }; ... };
3501 then G++ will emit stabs for `struct A::B' that call it simply
3502 `struct B'. Obviously, if you've got a real top-level definition for
3503 `struct B', or other nested definitions, this is going to cause
3506 Obviously, GDB can't fix this by itself, but it can at least avoid
3507 scribbling on existing structure type objects when new definitions
3509 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3510 || TYPE_STUB (type)))
3512 complain_about_struct_wipeout (type);
3514 /* It's probably best to return the type unchanged. */
3518 back_to = make_cleanup (null_cleanup, 0);
3520 INIT_CPLUS_SPECIFIC (type);
3521 TYPE_CODE (type) = type_code;
3522 TYPE_STUB (type) = 0;
3524 /* First comes the total size in bytes. */
3529 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3532 do_cleanups (back_to);
3533 return error_type (pp, objfile);
3535 set_length_in_type_chain (type);
3538 /* Now read the baseclasses, if any, read the regular C struct or C++
3539 class member fields, attach the fields to the type, read the C++
3540 member functions, attach them to the type, and then read any tilde
3541 field (baseclass specifier for the class holding the main vtable). */
3543 if (!read_baseclasses (&fi, pp, type, objfile)
3544 || !read_struct_fields (&fi, pp, type, objfile)
3545 || !attach_fields_to_type (&fi, type, objfile)
3546 || !read_member_functions (&fi, pp, type, objfile)
3547 || !attach_fn_fields_to_type (&fi, type)
3548 || !read_tilde_fields (&fi, pp, type, objfile))
3550 type = error_type (pp, objfile);
3553 do_cleanups (back_to);
3557 /* Read a definition of an array type,
3558 and create and return a suitable type object.
3559 Also creates a range type which represents the bounds of that
3562 static struct type *
3563 read_array_type (const char **pp, struct type *type,
3564 struct objfile *objfile)
3566 struct type *index_type, *element_type, *range_type;
3571 /* Format of an array type:
3572 "ar<index type>;lower;upper;<array_contents_type>".
3573 OS9000: "arlower,upper;<array_contents_type>".
3575 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3576 for these, produce a type like float[][]. */
3579 index_type = read_type (pp, objfile);
3581 /* Improper format of array type decl. */
3582 return error_type (pp, objfile);
3586 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3591 lower = read_huge_number (pp, ';', &nbits, 0);
3594 return error_type (pp, objfile);
3596 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3601 upper = read_huge_number (pp, ';', &nbits, 0);
3603 return error_type (pp, objfile);
3605 element_type = read_type (pp, objfile);
3614 create_static_range_type ((struct type *) NULL, index_type, lower, upper);
3615 type = create_array_type (type, element_type, range_type);
3621 /* Read a definition of an enumeration type,
3622 and create and return a suitable type object.
3623 Also defines the symbols that represent the values of the type. */
3625 static struct type *
3626 read_enum_type (const char **pp, struct type *type,
3627 struct objfile *objfile)
3629 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3635 struct pending **symlist;
3636 struct pending *osyms, *syms;
3639 int unsigned_enum = 1;
3642 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3643 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3644 to do? For now, force all enum values to file scope. */
3645 if (within_function)
3646 symlist = get_local_symbols ();
3649 symlist = get_file_symbols ();
3651 o_nsyms = osyms ? osyms->nsyms : 0;
3653 /* The aix4 compiler emits an extra field before the enum members;
3654 my guess is it's a type of some sort. Just ignore it. */
3657 /* Skip over the type. */
3661 /* Skip over the colon. */
3665 /* Read the value-names and their values.
3666 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3667 A semicolon or comma instead of a NAME means the end. */
3668 while (**pp && **pp != ';' && **pp != ',')
3670 STABS_CONTINUE (pp, objfile);
3674 name = (char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
3676 n = read_huge_number (pp, ',', &nbits, 0);
3678 return error_type (pp, objfile);
3680 sym = allocate_symbol (objfile);
3681 SYMBOL_SET_LINKAGE_NAME (sym, name);
3682 SYMBOL_SET_LANGUAGE (sym, get_current_subfile ()->language,
3683 &objfile->objfile_obstack);
3684 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
3685 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3686 SYMBOL_VALUE (sym) = n;
3689 add_symbol_to_list (sym, symlist);
3694 (*pp)++; /* Skip the semicolon. */
3696 /* Now fill in the fields of the type-structure. */
3698 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3699 set_length_in_type_chain (type);
3700 TYPE_CODE (type) = TYPE_CODE_ENUM;
3701 TYPE_STUB (type) = 0;
3703 TYPE_UNSIGNED (type) = 1;
3704 TYPE_NFIELDS (type) = nsyms;
3705 TYPE_FIELDS (type) = (struct field *)
3706 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3707 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3709 /* Find the symbols for the values and put them into the type.
3710 The symbols can be found in the symlist that we put them on
3711 to cause them to be defined. osyms contains the old value
3712 of that symlist; everything up to there was defined by us. */
3713 /* Note that we preserve the order of the enum constants, so
3714 that in something like "enum {FOO, LAST_THING=FOO}" we print
3715 FOO, not LAST_THING. */
3717 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3719 int last = syms == osyms ? o_nsyms : 0;
3720 int j = syms->nsyms;
3722 for (; --j >= last; --n)
3724 struct symbol *xsym = syms->symbol[j];
3726 SYMBOL_TYPE (xsym) = type;
3727 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3728 SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
3729 TYPE_FIELD_BITSIZE (type, n) = 0;
3738 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3739 typedefs in every file (for int, long, etc):
3741 type = b <signed> <width> <format type>; <offset>; <nbits>
3743 optional format type = c or b for char or boolean.
3744 offset = offset from high order bit to start bit of type.
3745 width is # bytes in object of this type, nbits is # bits in type.
3747 The width/offset stuff appears to be for small objects stored in
3748 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3751 static struct type *
3752 read_sun_builtin_type (const char **pp, int typenums[2], struct objfile *objfile)
3757 int boolean_type = 0;
3768 return error_type (pp, objfile);
3772 /* For some odd reason, all forms of char put a c here. This is strange
3773 because no other type has this honor. We can safely ignore this because
3774 we actually determine 'char'acterness by the number of bits specified in
3776 Boolean forms, e.g Fortran logical*X, put a b here. */
3780 else if (**pp == 'b')
3786 /* The first number appears to be the number of bytes occupied
3787 by this type, except that unsigned short is 4 instead of 2.
3788 Since this information is redundant with the third number,
3789 we will ignore it. */
3790 read_huge_number (pp, ';', &nbits, 0);
3792 return error_type (pp, objfile);
3794 /* The second number is always 0, so ignore it too. */
3795 read_huge_number (pp, ';', &nbits, 0);
3797 return error_type (pp, objfile);
3799 /* The third number is the number of bits for this type. */
3800 type_bits = read_huge_number (pp, 0, &nbits, 0);
3802 return error_type (pp, objfile);
3803 /* The type *should* end with a semicolon. If it are embedded
3804 in a larger type the semicolon may be the only way to know where
3805 the type ends. If this type is at the end of the stabstring we
3806 can deal with the omitted semicolon (but we don't have to like
3807 it). Don't bother to complain(), Sun's compiler omits the semicolon
3814 struct type *type = init_type (objfile, TYPE_CODE_VOID,
3815 TARGET_CHAR_BIT, NULL);
3817 TYPE_UNSIGNED (type) = 1;
3822 return init_boolean_type (objfile, type_bits, unsigned_type, NULL);
3824 return init_integer_type (objfile, type_bits, unsigned_type, NULL);
3827 static struct type *
3828 read_sun_floating_type (const char **pp, int typenums[2],
3829 struct objfile *objfile)
3834 struct type *rettype;
3836 /* The first number has more details about the type, for example
3838 details = read_huge_number (pp, ';', &nbits, 0);
3840 return error_type (pp, objfile);
3842 /* The second number is the number of bytes occupied by this type. */
3843 nbytes = read_huge_number (pp, ';', &nbits, 0);
3845 return error_type (pp, objfile);
3847 nbits = nbytes * TARGET_CHAR_BIT;
3849 if (details == NF_COMPLEX || details == NF_COMPLEX16
3850 || details == NF_COMPLEX32)
3852 rettype = dbx_init_float_type (objfile, nbits / 2);
3853 return init_complex_type (objfile, NULL, rettype);
3856 return dbx_init_float_type (objfile, nbits);
3859 /* Read a number from the string pointed to by *PP.
3860 The value of *PP is advanced over the number.
3861 If END is nonzero, the character that ends the
3862 number must match END, or an error happens;
3863 and that character is skipped if it does match.
3864 If END is zero, *PP is left pointing to that character.
3866 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3867 the number is represented in an octal representation, assume that
3868 it is represented in a 2's complement representation with a size of
3869 TWOS_COMPLEMENT_BITS.
3871 If the number fits in a long, set *BITS to 0 and return the value.
3872 If not, set *BITS to be the number of bits in the number and return 0.
3874 If encounter garbage, set *BITS to -1 and return 0. */
3877 read_huge_number (const char **pp, int end, int *bits,
3878 int twos_complement_bits)
3880 const char *p = *pp;
3889 int twos_complement_representation = 0;
3897 /* Leading zero means octal. GCC uses this to output values larger
3898 than an int (because that would be hard in decimal). */
3905 /* Skip extra zeros. */
3909 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3911 /* Octal, possibly signed. Check if we have enough chars for a
3917 while ((c = *p1) >= '0' && c < '8')
3921 if (len > twos_complement_bits / 3
3922 || (twos_complement_bits % 3 == 0
3923 && len == twos_complement_bits / 3))
3925 /* Ok, we have enough characters for a signed value, check
3926 for signness by testing if the sign bit is set. */
3927 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3929 if (c & (1 << sign_bit))
3931 /* Definitely signed. */
3932 twos_complement_representation = 1;
3938 upper_limit = LONG_MAX / radix;
3940 while ((c = *p++) >= '0' && c < ('0' + radix))
3942 if (n <= upper_limit)
3944 if (twos_complement_representation)
3946 /* Octal, signed, twos complement representation. In
3947 this case, n is the corresponding absolute value. */
3950 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3962 /* unsigned representation */
3964 n += c - '0'; /* FIXME this overflows anyway. */
3970 /* This depends on large values being output in octal, which is
3977 /* Ignore leading zeroes. */
3981 else if (c == '2' || c == '3')
4002 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
4004 /* We were supposed to parse a number with maximum
4005 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4016 /* Large decimal constants are an error (because it is hard to
4017 count how many bits are in them). */
4023 /* -0x7f is the same as 0x80. So deal with it by adding one to
4024 the number of bits. Two's complement represention octals
4025 can't have a '-' in front. */
4026 if (sign == -1 && !twos_complement_representation)
4037 /* It's *BITS which has the interesting information. */
4041 static struct type *
4042 read_range_type (const char **pp, int typenums[2], int type_size,
4043 struct objfile *objfile)
4045 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4046 const char *orig_pp = *pp;
4051 struct type *result_type;
4052 struct type *index_type = NULL;
4054 /* First comes a type we are a subrange of.
4055 In C it is usually 0, 1 or the type being defined. */
4056 if (read_type_number (pp, rangenums) != 0)
4057 return error_type (pp, objfile);
4058 self_subrange = (rangenums[0] == typenums[0] &&
4059 rangenums[1] == typenums[1]);
4064 index_type = read_type (pp, objfile);
4067 /* A semicolon should now follow; skip it. */
4071 /* The remaining two operands are usually lower and upper bounds
4072 of the range. But in some special cases they mean something else. */
4073 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4074 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4076 if (n2bits == -1 || n3bits == -1)
4077 return error_type (pp, objfile);
4080 goto handle_true_range;
4082 /* If limits are huge, must be large integral type. */
4083 if (n2bits != 0 || n3bits != 0)
4085 char got_signed = 0;
4086 char got_unsigned = 0;
4087 /* Number of bits in the type. */
4090 /* If a type size attribute has been specified, the bounds of
4091 the range should fit in this size. If the lower bounds needs
4092 more bits than the upper bound, then the type is signed. */
4093 if (n2bits <= type_size && n3bits <= type_size)
4095 if (n2bits == type_size && n2bits > n3bits)
4101 /* Range from 0 to <large number> is an unsigned large integral type. */
4102 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4107 /* Range from <large number> to <large number>-1 is a large signed
4108 integral type. Take care of the case where <large number> doesn't
4109 fit in a long but <large number>-1 does. */
4110 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4111 || (n2bits != 0 && n3bits == 0
4112 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4119 if (got_signed || got_unsigned)
4120 return init_integer_type (objfile, nbits, got_unsigned, NULL);
4122 return error_type (pp, objfile);
4125 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4126 if (self_subrange && n2 == 0 && n3 == 0)
4127 return init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL);
4129 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4130 is the width in bytes.
4132 Fortran programs appear to use this for complex types also. To
4133 distinguish between floats and complex, g77 (and others?) seem
4134 to use self-subranges for the complexes, and subranges of int for
4137 Also note that for complexes, g77 sets n2 to the size of one of
4138 the member floats, not the whole complex beast. My guess is that
4139 this was to work well with pre-COMPLEX versions of gdb. */
4141 if (n3 == 0 && n2 > 0)
4143 struct type *float_type
4144 = dbx_init_float_type (objfile, n2 * TARGET_CHAR_BIT);
4147 return init_complex_type (objfile, NULL, float_type);
4152 /* If the upper bound is -1, it must really be an unsigned integral. */
4154 else if (n2 == 0 && n3 == -1)
4156 int bits = type_size;
4160 /* We don't know its size. It is unsigned int or unsigned
4161 long. GCC 2.3.3 uses this for long long too, but that is
4162 just a GDB 3.5 compatibility hack. */
4163 bits = gdbarch_int_bit (gdbarch);
4166 return init_integer_type (objfile, bits, 1, NULL);
4169 /* Special case: char is defined (Who knows why) as a subrange of
4170 itself with range 0-127. */
4171 else if (self_subrange && n2 == 0 && n3 == 127)
4173 struct type *type = init_integer_type (objfile, TARGET_CHAR_BIT,
4175 TYPE_NOSIGN (type) = 1;
4178 /* We used to do this only for subrange of self or subrange of int. */
4181 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4182 "unsigned long", and we already checked for that,
4183 so don't need to test for it here. */
4186 /* n3 actually gives the size. */
4187 return init_integer_type (objfile, -n3 * TARGET_CHAR_BIT, 1, NULL);
4189 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4190 unsigned n-byte integer. But do require n to be a power of
4191 two; we don't want 3- and 5-byte integers flying around. */
4197 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4200 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4201 return init_integer_type (objfile, bytes * TARGET_CHAR_BIT, 1, NULL);
4204 /* I think this is for Convex "long long". Since I don't know whether
4205 Convex sets self_subrange, I also accept that particular size regardless
4206 of self_subrange. */
4207 else if (n3 == 0 && n2 < 0
4209 || n2 == -gdbarch_long_long_bit
4210 (gdbarch) / TARGET_CHAR_BIT))
4211 return init_integer_type (objfile, -n2 * TARGET_CHAR_BIT, 0, NULL);
4212 else if (n2 == -n3 - 1)
4215 return init_integer_type (objfile, 8, 0, NULL);
4217 return init_integer_type (objfile, 16, 0, NULL);
4218 if (n3 == 0x7fffffff)
4219 return init_integer_type (objfile, 32, 0, NULL);
4222 /* We have a real range type on our hands. Allocate space and
4223 return a real pointer. */
4227 index_type = objfile_type (objfile)->builtin_int;
4229 index_type = *dbx_lookup_type (rangenums, objfile);
4230 if (index_type == NULL)
4232 /* Does this actually ever happen? Is that why we are worrying
4233 about dealing with it rather than just calling error_type? */
4235 complaint (_("base type %d of range type is not defined"), rangenums[1]);
4237 index_type = objfile_type (objfile)->builtin_int;
4241 = create_static_range_type ((struct type *) NULL, index_type, n2, n3);
4242 return (result_type);
4245 /* Read in an argument list. This is a list of types, separated by commas
4246 and terminated with END. Return the list of types read in, or NULL
4247 if there is an error. */
4249 static struct field *
4250 read_args (const char **pp, int end, struct objfile *objfile, int *nargsp,
4253 /* FIXME! Remove this arbitrary limit! */
4254 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4261 /* Invalid argument list: no ','. */
4264 STABS_CONTINUE (pp, objfile);
4265 types[n++] = read_type (pp, objfile);
4267 (*pp)++; /* get past `end' (the ':' character). */
4271 /* We should read at least the THIS parameter here. Some broken stabs
4272 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4273 have been present ";-16,(0,43)" reference instead. This way the
4274 excessive ";" marker prematurely stops the parameters parsing. */
4276 complaint (_("Invalid (empty) method arguments"));
4279 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4287 rval = XCNEWVEC (struct field, n);
4288 for (i = 0; i < n; i++)
4289 rval[i].type = types[i];
4294 /* Common block handling. */
4296 /* List of symbols declared since the last BCOMM. This list is a tail
4297 of local_symbols. When ECOMM is seen, the symbols on the list
4298 are noted so their proper addresses can be filled in later,
4299 using the common block base address gotten from the assembler
4302 static struct pending *common_block;
4303 static int common_block_i;
4305 /* Name of the current common block. We get it from the BCOMM instead of the
4306 ECOMM to match IBM documentation (even though IBM puts the name both places
4307 like everyone else). */
4308 static char *common_block_name;
4310 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4311 to remain after this function returns. */
4314 common_block_start (const char *name, struct objfile *objfile)
4316 if (common_block_name != NULL)
4318 complaint (_("Invalid symbol data: common block within common block"));
4320 common_block = *get_local_symbols ();
4321 common_block_i = common_block ? common_block->nsyms : 0;
4322 common_block_name = (char *) obstack_copy0 (&objfile->objfile_obstack, name,
4326 /* Process a N_ECOMM symbol. */
4329 common_block_end (struct objfile *objfile)
4331 /* Symbols declared since the BCOMM are to have the common block
4332 start address added in when we know it. common_block and
4333 common_block_i point to the first symbol after the BCOMM in
4334 the local_symbols list; copy the list and hang it off the
4335 symbol for the common block name for later fixup. */
4338 struct pending *newobj = 0;
4339 struct pending *next;
4342 if (common_block_name == NULL)
4344 complaint (_("ECOMM symbol unmatched by BCOMM"));
4348 sym = allocate_symbol (objfile);
4349 /* Note: common_block_name already saved on objfile_obstack. */
4350 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4351 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
4353 /* Now we copy all the symbols which have been defined since the BCOMM. */
4355 /* Copy all the struct pendings before common_block. */
4356 for (next = *get_local_symbols ();
4357 next != NULL && next != common_block;
4360 for (j = 0; j < next->nsyms; j++)
4361 add_symbol_to_list (next->symbol[j], &newobj);
4364 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4365 NULL, it means copy all the local symbols (which we already did
4368 if (common_block != NULL)
4369 for (j = common_block_i; j < common_block->nsyms; j++)
4370 add_symbol_to_list (common_block->symbol[j], &newobj);
4372 SYMBOL_TYPE (sym) = (struct type *) newobj;
4374 /* Should we be putting local_symbols back to what it was?
4377 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4378 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4379 global_sym_chain[i] = sym;
4380 common_block_name = NULL;
4383 /* Add a common block's start address to the offset of each symbol
4384 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4385 the common block name). */
4388 fix_common_block (struct symbol *sym, CORE_ADDR valu)
4390 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4392 for (; next; next = next->next)
4396 for (j = next->nsyms - 1; j >= 0; j--)
4397 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4403 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4404 See add_undefined_type for more details. */
4407 add_undefined_type_noname (struct type *type, int typenums[2])
4411 nat.typenums[0] = typenums [0];
4412 nat.typenums[1] = typenums [1];
4415 if (noname_undefs_length == noname_undefs_allocated)
4417 noname_undefs_allocated *= 2;
4418 noname_undefs = (struct nat *)
4419 xrealloc ((char *) noname_undefs,
4420 noname_undefs_allocated * sizeof (struct nat));
4422 noname_undefs[noname_undefs_length++] = nat;
4425 /* Add TYPE to the UNDEF_TYPES vector.
4426 See add_undefined_type for more details. */
4429 add_undefined_type_1 (struct type *type)
4431 if (undef_types_length == undef_types_allocated)
4433 undef_types_allocated *= 2;
4434 undef_types = (struct type **)
4435 xrealloc ((char *) undef_types,
4436 undef_types_allocated * sizeof (struct type *));
4438 undef_types[undef_types_length++] = type;
4441 /* What about types defined as forward references inside of a small lexical
4443 /* Add a type to the list of undefined types to be checked through
4444 once this file has been read in.
4446 In practice, we actually maintain two such lists: The first list
4447 (UNDEF_TYPES) is used for types whose name has been provided, and
4448 concerns forward references (eg 'xs' or 'xu' forward references);
4449 the second list (NONAME_UNDEFS) is used for types whose name is
4450 unknown at creation time, because they were referenced through
4451 their type number before the actual type was declared.
4452 This function actually adds the given type to the proper list. */
4455 add_undefined_type (struct type *type, int typenums[2])
4457 if (TYPE_NAME (type) == NULL)
4458 add_undefined_type_noname (type, typenums);
4460 add_undefined_type_1 (type);
4463 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4466 cleanup_undefined_types_noname (struct objfile *objfile)
4470 for (i = 0; i < noname_undefs_length; i++)
4472 struct nat nat = noname_undefs[i];
4475 type = dbx_lookup_type (nat.typenums, objfile);
4476 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4478 /* The instance flags of the undefined type are still unset,
4479 and needs to be copied over from the reference type.
4480 Since replace_type expects them to be identical, we need
4481 to set these flags manually before hand. */
4482 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4483 replace_type (nat.type, *type);
4487 noname_undefs_length = 0;
4490 /* Go through each undefined type, see if it's still undefined, and fix it
4491 up if possible. We have two kinds of undefined types:
4493 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4494 Fix: update array length using the element bounds
4495 and the target type's length.
4496 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4497 yet defined at the time a pointer to it was made.
4498 Fix: Do a full lookup on the struct/union tag. */
4501 cleanup_undefined_types_1 (void)
4505 /* Iterate over every undefined type, and look for a symbol whose type
4506 matches our undefined type. The symbol matches if:
4507 1. It is a typedef in the STRUCT domain;
4508 2. It has the same name, and same type code;
4509 3. The instance flags are identical.
4511 It is important to check the instance flags, because we have seen
4512 examples where the debug info contained definitions such as:
4514 "foo_t:t30=B31=xefoo_t:"
4516 In this case, we have created an undefined type named "foo_t" whose
4517 instance flags is null (when processing "xefoo_t"), and then created
4518 another type with the same name, but with different instance flags
4519 ('B' means volatile). I think that the definition above is wrong,
4520 since the same type cannot be volatile and non-volatile at the same
4521 time, but we need to be able to cope with it when it happens. The
4522 approach taken here is to treat these two types as different. */
4524 for (type = undef_types; type < undef_types + undef_types_length; type++)
4526 switch (TYPE_CODE (*type))
4529 case TYPE_CODE_STRUCT:
4530 case TYPE_CODE_UNION:
4531 case TYPE_CODE_ENUM:
4533 /* Check if it has been defined since. Need to do this here
4534 as well as in check_typedef to deal with the (legitimate in
4535 C though not C++) case of several types with the same name
4536 in different source files. */
4537 if (TYPE_STUB (*type))
4539 struct pending *ppt;
4541 /* Name of the type, without "struct" or "union". */
4542 const char *type_name = TYPE_NAME (*type);
4544 if (type_name == NULL)
4546 complaint (_("need a type name"));
4549 for (ppt = *get_file_symbols (); ppt; ppt = ppt->next)
4551 for (i = 0; i < ppt->nsyms; i++)
4553 struct symbol *sym = ppt->symbol[i];
4555 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4556 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4557 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4559 && (TYPE_INSTANCE_FLAGS (*type) ==
4560 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4561 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4563 replace_type (*type, SYMBOL_TYPE (sym));
4572 complaint (_("forward-referenced types left unresolved, "
4580 undef_types_length = 0;
4583 /* Try to fix all the undefined types we ecountered while processing
4587 cleanup_undefined_stabs_types (struct objfile *objfile)
4589 cleanup_undefined_types_1 ();
4590 cleanup_undefined_types_noname (objfile);
4593 /* See stabsread.h. */
4596 scan_file_globals (struct objfile *objfile)
4599 struct minimal_symbol *msymbol;
4600 struct symbol *sym, *prev;
4601 struct objfile *resolve_objfile;
4603 /* SVR4 based linkers copy referenced global symbols from shared
4604 libraries to the main executable.
4605 If we are scanning the symbols for a shared library, try to resolve
4606 them from the minimal symbols of the main executable first. */
4608 if (symfile_objfile && objfile != symfile_objfile)
4609 resolve_objfile = symfile_objfile;
4611 resolve_objfile = objfile;
4615 /* Avoid expensive loop through all minimal symbols if there are
4616 no unresolved symbols. */
4617 for (hash = 0; hash < HASHSIZE; hash++)
4619 if (global_sym_chain[hash])
4622 if (hash >= HASHSIZE)
4625 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4629 /* Skip static symbols. */
4630 switch (MSYMBOL_TYPE (msymbol))
4642 /* Get the hash index and check all the symbols
4643 under that hash index. */
4645 hash = hashname (MSYMBOL_LINKAGE_NAME (msymbol));
4647 for (sym = global_sym_chain[hash]; sym;)
4649 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol),
4650 SYMBOL_LINKAGE_NAME (sym)) == 0)
4652 /* Splice this symbol out of the hash chain and
4653 assign the value we have to it. */
4656 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4660 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4663 /* Check to see whether we need to fix up a common block. */
4664 /* Note: this code might be executed several times for
4665 the same symbol if there are multiple references. */
4668 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4670 fix_common_block (sym,
4671 MSYMBOL_VALUE_ADDRESS (resolve_objfile,
4676 SYMBOL_VALUE_ADDRESS (sym)
4677 = MSYMBOL_VALUE_ADDRESS (resolve_objfile, msymbol);
4679 SYMBOL_SECTION (sym) = MSYMBOL_SECTION (msymbol);
4684 sym = SYMBOL_VALUE_CHAIN (prev);
4688 sym = global_sym_chain[hash];
4694 sym = SYMBOL_VALUE_CHAIN (sym);
4698 if (resolve_objfile == objfile)
4700 resolve_objfile = objfile;
4703 /* Change the storage class of any remaining unresolved globals to
4704 LOC_UNRESOLVED and remove them from the chain. */
4705 for (hash = 0; hash < HASHSIZE; hash++)
4707 sym = global_sym_chain[hash];
4711 sym = SYMBOL_VALUE_CHAIN (sym);
4713 /* Change the symbol address from the misleading chain value
4715 SYMBOL_VALUE_ADDRESS (prev) = 0;
4717 /* Complain about unresolved common block symbols. */
4718 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4719 SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
4721 complaint (_("%s: common block `%s' from "
4722 "global_sym_chain unresolved"),
4723 objfile_name (objfile), SYMBOL_PRINT_NAME (prev));
4726 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4729 /* Initialize anything that needs initializing when starting to read
4730 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4734 stabsread_init (void)
4738 /* Initialize anything that needs initializing when a completely new
4739 symbol file is specified (not just adding some symbols from another
4740 file, e.g. a shared library). */
4743 stabsread_new_init (void)
4745 /* Empty the hash table of global syms looking for values. */
4746 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4749 /* Initialize anything that needs initializing at the same time as
4750 start_symtab() is called. */
4755 global_stabs = NULL; /* AIX COFF */
4756 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4757 n_this_object_header_files = 1;
4758 type_vector_length = 0;
4759 type_vector = (struct type **) 0;
4760 within_function = 0;
4762 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4763 common_block_name = NULL;
4766 /* Call after end_symtab(). */
4773 xfree (type_vector);
4776 type_vector_length = 0;
4777 previous_stab_code = 0;
4781 finish_global_stabs (struct objfile *objfile)
4785 patch_block_stabs (*get_global_symbols (), global_stabs, objfile);
4786 xfree (global_stabs);
4787 global_stabs = NULL;
4791 /* Find the end of the name, delimited by a ':', but don't match
4792 ObjC symbols which look like -[Foo bar::]:bla. */
4794 find_name_end (const char *name)
4796 const char *s = name;
4798 if (s[0] == '-' || *s == '+')
4800 /* Must be an ObjC method symbol. */
4803 error (_("invalid symbol name \"%s\""), name);
4805 s = strchr (s, ']');
4808 error (_("invalid symbol name \"%s\""), name);
4810 return strchr (s, ':');
4814 return strchr (s, ':');
4818 /* See stabsread.h. */
4821 hashname (const char *name)
4823 return hash (name, strlen (name)) % HASHSIZE;
4826 /* Initializer for this module. */
4829 _initialize_stabsread (void)
4831 rs6000_builtin_type_data = register_objfile_data ();
4833 undef_types_allocated = 20;
4834 undef_types_length = 0;
4835 undef_types = XNEWVEC (struct type *, undef_types_allocated);
4837 noname_undefs_allocated = 20;
4838 noname_undefs_length = 0;
4839 noname_undefs = XNEWVEC (struct nat, noname_undefs_allocated);
4841 stab_register_index = register_symbol_register_impl (LOC_REGISTER,
4842 &stab_register_funcs);
4843 stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
4844 &stab_register_funcs);