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 (get_buildsym_compunit (), sym,
762 /* Determine the type of name being defined. */
764 /* Getting GDB to correctly skip the symbol on an undefined symbol
765 descriptor and not ever dump core is a very dodgy proposition if
766 we do things this way. I say the acorn RISC machine can just
767 fix their compiler. */
768 /* The Acorn RISC machine's compiler can put out locals that don't
769 start with "234=" or "(3,4)=", so assume anything other than the
770 deftypes we know how to handle is a local. */
771 if (!strchr ("cfFGpPrStTvVXCR", *p))
773 if (isdigit (*p) || *p == '(' || *p == '-')
782 /* c is a special case, not followed by a type-number.
783 SYMBOL:c=iVALUE for an integer constant symbol.
784 SYMBOL:c=rVALUE for a floating constant symbol.
785 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
786 e.g. "b:c=e6,0" for "const b = blob1"
787 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
790 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
791 SYMBOL_TYPE (sym) = error_type (&p, objfile);
792 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
793 add_symbol_to_list (sym, get_file_symbols ());
802 struct type *dbl_type;
804 dbl_type = objfile_type (objfile)->builtin_double;
806 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack,
807 TYPE_LENGTH (dbl_type));
809 target_float_from_string (dbl_valu, dbl_type, std::string (p));
811 SYMBOL_TYPE (sym) = dbl_type;
812 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
813 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
818 /* Defining integer constants this way is kind of silly,
819 since 'e' constants allows the compiler to give not
820 only the value, but the type as well. C has at least
821 int, long, unsigned int, and long long as constant
822 types; other languages probably should have at least
823 unsigned as well as signed constants. */
825 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
826 SYMBOL_VALUE (sym) = atoi (p);
827 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
833 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
834 SYMBOL_VALUE (sym) = atoi (p);
835 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
841 struct type *range_type;
844 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
845 gdb_byte *string_value;
847 if (quote != '\'' && quote != '"')
849 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
850 SYMBOL_TYPE (sym) = error_type (&p, objfile);
851 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
852 add_symbol_to_list (sym, get_file_symbols ());
856 /* Find matching quote, rejecting escaped quotes. */
857 while (*p && *p != quote)
859 if (*p == '\\' && p[1] == quote)
861 string_local[ind] = (gdb_byte) quote;
867 string_local[ind] = (gdb_byte) (*p);
874 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
875 SYMBOL_TYPE (sym) = error_type (&p, objfile);
876 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
877 add_symbol_to_list (sym, get_file_symbols ());
881 /* NULL terminate the string. */
882 string_local[ind] = 0;
884 = create_static_range_type (NULL,
885 objfile_type (objfile)->builtin_int,
887 SYMBOL_TYPE (sym) = create_array_type (NULL,
888 objfile_type (objfile)->builtin_char,
891 = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, ind + 1);
892 memcpy (string_value, string_local, ind + 1);
895 SYMBOL_VALUE_BYTES (sym) = string_value;
896 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
901 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
902 can be represented as integral.
903 e.g. "b:c=e6,0" for "const b = blob1"
904 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
906 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
907 SYMBOL_TYPE (sym) = read_type (&p, objfile);
911 SYMBOL_TYPE (sym) = error_type (&p, objfile);
916 /* If the value is too big to fit in an int (perhaps because
917 it is unsigned), or something like that, we silently get
918 a bogus value. The type and everything else about it is
919 correct. Ideally, we should be using whatever we have
920 available for parsing unsigned and long long values,
922 SYMBOL_VALUE (sym) = atoi (p);
927 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
928 SYMBOL_TYPE (sym) = error_type (&p, objfile);
931 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
932 add_symbol_to_list (sym, get_file_symbols ());
936 /* The name of a caught exception. */
937 SYMBOL_TYPE (sym) = read_type (&p, objfile);
938 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
939 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
940 SYMBOL_VALUE_ADDRESS (sym) = valu;
941 add_symbol_to_list (sym, get_local_symbols ());
945 /* A static function definition. */
946 SYMBOL_TYPE (sym) = read_type (&p, objfile);
947 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
948 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
949 add_symbol_to_list (sym, get_file_symbols ());
950 /* fall into process_function_types. */
952 process_function_types:
953 /* Function result types are described as the result type in stabs.
954 We need to convert this to the function-returning-type-X type
955 in GDB. E.g. "int" is converted to "function returning int". */
956 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
957 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
959 /* All functions in C++ have prototypes. Stabs does not offer an
960 explicit way to identify prototyped or unprototyped functions,
961 but both GCC and Sun CC emit stabs for the "call-as" type rather
962 than the "declared-as" type for unprototyped functions, so
963 we treat all functions as if they were prototyped. This is used
964 primarily for promotion when calling the function from GDB. */
965 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
967 /* fall into process_prototype_types. */
969 process_prototype_types:
970 /* Sun acc puts declared types of arguments here. */
973 struct type *ftype = SYMBOL_TYPE (sym);
978 /* Obtain a worst case guess for the number of arguments
979 by counting the semicolons. */
986 /* Allocate parameter information fields and fill them in. */
987 TYPE_FIELDS (ftype) = (struct field *)
988 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
993 /* A type number of zero indicates the start of varargs.
994 FIXME: GDB currently ignores vararg functions. */
995 if (p[0] == '0' && p[1] == '\0')
997 ptype = read_type (&p, objfile);
999 /* The Sun compilers mark integer arguments, which should
1000 be promoted to the width of the calling conventions, with
1001 a type which references itself. This type is turned into
1002 a TYPE_CODE_VOID type by read_type, and we have to turn
1003 it back into builtin_int here.
1004 FIXME: Do we need a new builtin_promoted_int_arg ? */
1005 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
1006 ptype = objfile_type (objfile)->builtin_int;
1007 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
1008 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
1010 TYPE_NFIELDS (ftype) = nparams;
1011 TYPE_PROTOTYPED (ftype) = 1;
1016 /* A global function definition. */
1017 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1018 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
1019 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1020 add_symbol_to_list (sym, get_global_symbols ());
1021 goto process_function_types;
1024 /* For a class G (global) symbol, it appears that the
1025 value is not correct. It is necessary to search for the
1026 corresponding linker definition to find the value.
1027 These definitions appear at the end of the namelist. */
1028 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1029 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1030 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1031 /* Don't add symbol references to global_sym_chain.
1032 Symbol references don't have valid names and wont't match up with
1033 minimal symbols when the global_sym_chain is relocated.
1034 We'll fixup symbol references when we fixup the defining symbol. */
1035 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1037 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1038 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1039 global_sym_chain[i] = sym;
1041 add_symbol_to_list (sym, get_global_symbols ());
1044 /* This case is faked by a conditional above,
1045 when there is no code letter in the dbx data.
1046 Dbx data never actually contains 'l'. */
1049 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1050 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1051 SYMBOL_VALUE (sym) = valu;
1052 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1053 add_symbol_to_list (sym, get_local_symbols ());
1058 /* pF is a two-letter code that means a function parameter in Fortran.
1059 The type-number specifies the type of the return value.
1060 Translate it into a pointer-to-function type. */
1064 = lookup_pointer_type
1065 (lookup_function_type (read_type (&p, objfile)));
1068 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1070 SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
1071 SYMBOL_VALUE (sym) = valu;
1072 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1073 SYMBOL_IS_ARGUMENT (sym) = 1;
1074 add_symbol_to_list (sym, get_local_symbols ());
1076 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1078 /* On little-endian machines, this crud is never necessary,
1079 and, if the extra bytes contain garbage, is harmful. */
1083 /* If it's gcc-compiled, if it says `short', believe it. */
1084 if (processing_gcc_compilation
1085 || gdbarch_believe_pcc_promotion (gdbarch))
1088 if (!gdbarch_believe_pcc_promotion (gdbarch))
1090 /* If PCC says a parameter is a short or a char, it is
1092 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1093 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1094 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1097 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1098 ? objfile_type (objfile)->builtin_unsigned_int
1099 : objfile_type (objfile)->builtin_int;
1106 /* acc seems to use P to declare the prototypes of functions that
1107 are referenced by this file. gdb is not prepared to deal
1108 with this extra information. FIXME, it ought to. */
1111 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1112 goto process_prototype_types;
1117 /* Parameter which is in a register. */
1118 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1119 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1120 SYMBOL_IS_ARGUMENT (sym) = 1;
1121 SYMBOL_VALUE (sym) = valu;
1122 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1123 add_symbol_to_list (sym, get_local_symbols ());
1127 /* Register variable (either global or local). */
1128 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1129 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1130 SYMBOL_VALUE (sym) = valu;
1131 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1132 if (within_function)
1134 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1135 the same name to represent an argument passed in a
1136 register. GCC uses 'P' for the same case. So if we find
1137 such a symbol pair we combine it into one 'P' symbol.
1138 For Sun cc we need to do this regardless of
1139 stabs_argument_has_addr, because the compiler puts out
1140 the 'p' symbol even if it never saves the argument onto
1143 On most machines, we want to preserve both symbols, so
1144 that we can still get information about what is going on
1145 with the stack (VAX for computing args_printed, using
1146 stack slots instead of saved registers in backtraces,
1149 Note that this code illegally combines
1150 main(argc) struct foo argc; { register struct foo argc; }
1151 but this case is considered pathological and causes a warning
1152 from a decent compiler. */
1154 struct pending *local_symbols = *get_local_symbols ();
1156 && local_symbols->nsyms > 0
1157 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1159 struct symbol *prev_sym;
1161 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1162 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1163 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1164 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1165 SYMBOL_LINKAGE_NAME (sym)) == 0)
1167 SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
1168 /* Use the type from the LOC_REGISTER; that is the type
1169 that is actually in that register. */
1170 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1171 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1176 add_symbol_to_list (sym, get_local_symbols ());
1179 add_symbol_to_list (sym, get_file_symbols ());
1183 /* Static symbol at top level of file. */
1184 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1185 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1186 SYMBOL_VALUE_ADDRESS (sym) = valu;
1187 if (gdbarch_static_transform_name_p (gdbarch)
1188 && gdbarch_static_transform_name (gdbarch,
1189 SYMBOL_LINKAGE_NAME (sym))
1190 != SYMBOL_LINKAGE_NAME (sym))
1192 struct bound_minimal_symbol msym;
1194 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1196 if (msym.minsym != NULL)
1198 const char *new_name = gdbarch_static_transform_name
1199 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1201 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1202 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1205 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1206 add_symbol_to_list (sym, get_file_symbols ());
1210 /* In Ada, there is no distinction between typedef and non-typedef;
1211 any type declaration implicitly has the equivalent of a typedef,
1212 and thus 't' is in fact equivalent to 'Tt'.
1214 Therefore, for Ada units, we check the character immediately
1215 before the 't', and if we do not find a 'T', then make sure to
1216 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1217 will be stored in the VAR_DOMAIN). If the symbol was indeed
1218 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1219 elsewhere, so we don't need to take care of that.
1221 This is important to do, because of forward references:
1222 The cleanup of undefined types stored in undef_types only uses
1223 STRUCT_DOMAIN symbols to perform the replacement. */
1224 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1227 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1229 /* For a nameless type, we don't want a create a symbol, thus we
1230 did not use `sym'. Return without further processing. */
1234 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1235 SYMBOL_VALUE (sym) = valu;
1236 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1237 /* C++ vagaries: we may have a type which is derived from
1238 a base type which did not have its name defined when the
1239 derived class was output. We fill in the derived class's
1240 base part member's name here in that case. */
1241 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1242 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1243 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1244 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1248 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1249 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1250 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1251 TYPE_NAME (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1254 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1256 /* gcc-2.6 or later (when using -fvtable-thunks)
1257 emits a unique named type for a vtable entry.
1258 Some gdb code depends on that specific name. */
1259 extern const char vtbl_ptr_name[];
1261 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1262 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1263 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1265 /* If we are giving a name to a type such as "pointer to
1266 foo" or "function returning foo", we better not set
1267 the TYPE_NAME. If the program contains "typedef char
1268 *caddr_t;", we don't want all variables of type char
1269 * to print as caddr_t. This is not just a
1270 consequence of GDB's type management; PCC and GCC (at
1271 least through version 2.4) both output variables of
1272 either type char * or caddr_t with the type number
1273 defined in the 't' symbol for caddr_t. If a future
1274 compiler cleans this up it GDB is not ready for it
1275 yet, but if it becomes ready we somehow need to
1276 disable this check (without breaking the PCC/GCC2.4
1281 Fortunately, this check seems not to be necessary
1282 for anything except pointers or functions. */
1283 /* ezannoni: 2000-10-26. This seems to apply for
1284 versions of gcc older than 2.8. This was the original
1285 problem: with the following code gdb would tell that
1286 the type for name1 is caddr_t, and func is char().
1288 typedef char *caddr_t;
1300 /* Pascal accepts names for pointer types. */
1301 if (get_current_subfile ()->language == language_pascal)
1303 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1307 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1310 add_symbol_to_list (sym, get_file_symbols ());
1314 /* Create the STRUCT_DOMAIN clone. */
1315 struct symbol *struct_sym = allocate_symbol (objfile);
1318 SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
1319 SYMBOL_VALUE (struct_sym) = valu;
1320 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1321 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1322 TYPE_NAME (SYMBOL_TYPE (sym))
1323 = obconcat (&objfile->objfile_obstack,
1324 SYMBOL_LINKAGE_NAME (sym),
1326 add_symbol_to_list (struct_sym, get_file_symbols ());
1332 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1333 by 't' which means we are typedef'ing it as well. */
1334 synonym = *p == 't';
1339 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1341 /* For a nameless type, we don't want a create a symbol, thus we
1342 did not use `sym'. Return without further processing. */
1346 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1347 SYMBOL_VALUE (sym) = valu;
1348 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1349 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1350 TYPE_NAME (SYMBOL_TYPE (sym))
1351 = obconcat (&objfile->objfile_obstack,
1352 SYMBOL_LINKAGE_NAME (sym),
1354 add_symbol_to_list (sym, get_file_symbols ());
1358 /* Clone the sym and then modify it. */
1359 struct symbol *typedef_sym = allocate_symbol (objfile);
1361 *typedef_sym = *sym;
1362 SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
1363 SYMBOL_VALUE (typedef_sym) = valu;
1364 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1365 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1366 TYPE_NAME (SYMBOL_TYPE (sym))
1367 = obconcat (&objfile->objfile_obstack,
1368 SYMBOL_LINKAGE_NAME (sym),
1370 add_symbol_to_list (typedef_sym, get_file_symbols ());
1375 /* Static symbol of local scope. */
1376 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1377 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1378 SYMBOL_VALUE_ADDRESS (sym) = valu;
1379 if (gdbarch_static_transform_name_p (gdbarch)
1380 && gdbarch_static_transform_name (gdbarch,
1381 SYMBOL_LINKAGE_NAME (sym))
1382 != SYMBOL_LINKAGE_NAME (sym))
1384 struct bound_minimal_symbol msym;
1386 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1388 if (msym.minsym != NULL)
1390 const char *new_name = gdbarch_static_transform_name
1391 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1393 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1394 SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
1397 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1398 add_symbol_to_list (sym, get_local_symbols ());
1402 /* Reference parameter */
1403 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1404 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1405 SYMBOL_IS_ARGUMENT (sym) = 1;
1406 SYMBOL_VALUE (sym) = valu;
1407 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1408 add_symbol_to_list (sym, get_local_symbols ());
1412 /* Reference parameter which is in a register. */
1413 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1414 SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
1415 SYMBOL_IS_ARGUMENT (sym) = 1;
1416 SYMBOL_VALUE (sym) = valu;
1417 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1418 add_symbol_to_list (sym, get_local_symbols ());
1422 /* This is used by Sun FORTRAN for "function result value".
1423 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1424 that Pascal uses it too, but when I tried it Pascal used
1425 "x:3" (local symbol) instead. */
1426 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1427 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1428 SYMBOL_VALUE (sym) = valu;
1429 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1430 add_symbol_to_list (sym, get_local_symbols ());
1434 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1435 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
1436 SYMBOL_VALUE (sym) = 0;
1437 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1438 add_symbol_to_list (sym, get_file_symbols ());
1442 /* Some systems pass variables of certain types by reference instead
1443 of by value, i.e. they will pass the address of a structure (in a
1444 register or on the stack) instead of the structure itself. */
1446 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1447 && SYMBOL_IS_ARGUMENT (sym))
1449 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1450 variables passed in a register). */
1451 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1452 SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
1453 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1454 and subsequent arguments on SPARC, for example). */
1455 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1456 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1462 /* Skip rest of this symbol and return an error type.
1464 General notes on error recovery: error_type always skips to the
1465 end of the symbol (modulo cretinous dbx symbol name continuation).
1466 Thus code like this:
1468 if (*(*pp)++ != ';')
1469 return error_type (pp, objfile);
1471 is wrong because if *pp starts out pointing at '\0' (typically as the
1472 result of an earlier error), it will be incremented to point to the
1473 start of the next symbol, which might produce strange results, at least
1474 if you run off the end of the string table. Instead use
1477 return error_type (pp, objfile);
1483 foo = error_type (pp, objfile);
1487 And in case it isn't obvious, the point of all this hair is so the compiler
1488 can define new types and new syntaxes, and old versions of the
1489 debugger will be able to read the new symbol tables. */
1491 static struct type *
1492 error_type (const char **pp, struct objfile *objfile)
1494 complaint (_("couldn't parse type; debugger out of date?"));
1497 /* Skip to end of symbol. */
1498 while (**pp != '\0')
1503 /* Check for and handle cretinous dbx symbol name continuation! */
1504 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1506 *pp = next_symbol_text (objfile);
1513 return objfile_type (objfile)->builtin_error;
1517 /* Read type information or a type definition; return the type. Even
1518 though this routine accepts either type information or a type
1519 definition, the distinction is relevant--some parts of stabsread.c
1520 assume that type information starts with a digit, '-', or '(' in
1521 deciding whether to call read_type. */
1523 static struct type *
1524 read_type (const char **pp, struct objfile *objfile)
1526 struct type *type = 0;
1529 char type_descriptor;
1531 /* Size in bits of type if specified by a type attribute, or -1 if
1532 there is no size attribute. */
1535 /* Used to distinguish string and bitstring from char-array and set. */
1538 /* Used to distinguish vector from array. */
1541 /* Read type number if present. The type number may be omitted.
1542 for instance in a two-dimensional array declared with type
1543 "ar1;1;10;ar1;1;10;4". */
1544 if ((**pp >= '0' && **pp <= '9')
1548 if (read_type_number (pp, typenums) != 0)
1549 return error_type (pp, objfile);
1553 /* Type is not being defined here. Either it already
1554 exists, or this is a forward reference to it.
1555 dbx_alloc_type handles both cases. */
1556 type = dbx_alloc_type (typenums, objfile);
1558 /* If this is a forward reference, arrange to complain if it
1559 doesn't get patched up by the time we're done
1561 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1562 add_undefined_type (type, typenums);
1567 /* Type is being defined here. */
1569 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1574 /* 'typenums=' not present, type is anonymous. Read and return
1575 the definition, but don't put it in the type vector. */
1576 typenums[0] = typenums[1] = -1;
1581 type_descriptor = (*pp)[-1];
1582 switch (type_descriptor)
1586 enum type_code code;
1588 /* Used to index through file_symbols. */
1589 struct pending *ppt;
1592 /* Name including "struct", etc. */
1596 const char *from, *p, *q1, *q2;
1598 /* Set the type code according to the following letter. */
1602 code = TYPE_CODE_STRUCT;
1605 code = TYPE_CODE_UNION;
1608 code = TYPE_CODE_ENUM;
1612 /* Complain and keep going, so compilers can invent new
1613 cross-reference types. */
1614 complaint (_("Unrecognized cross-reference type `%c'"),
1616 code = TYPE_CODE_STRUCT;
1621 q1 = strchr (*pp, '<');
1622 p = strchr (*pp, ':');
1624 return error_type (pp, objfile);
1625 if (q1 && p > q1 && p[1] == ':')
1627 int nesting_level = 0;
1629 for (q2 = q1; *q2; q2++)
1633 else if (*q2 == '>')
1635 else if (*q2 == ':' && nesting_level == 0)
1640 return error_type (pp, objfile);
1643 if (get_current_subfile ()->language == language_cplus)
1645 char *name = (char *) alloca (p - *pp + 1);
1647 memcpy (name, *pp, p - *pp);
1648 name[p - *pp] = '\0';
1650 std::string new_name = cp_canonicalize_string (name);
1651 if (!new_name.empty ())
1654 = (char *) obstack_copy0 (&objfile->objfile_obstack,
1656 new_name.length ());
1659 if (type_name == NULL)
1661 char *to = type_name = (char *)
1662 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1664 /* Copy the name. */
1671 /* Set the pointer ahead of the name which we just read, and
1676 /* If this type has already been declared, then reuse the same
1677 type, rather than allocating a new one. This saves some
1680 for (ppt = *get_file_symbols (); ppt; ppt = ppt->next)
1681 for (i = 0; i < ppt->nsyms; i++)
1683 struct symbol *sym = ppt->symbol[i];
1685 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1686 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1687 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1688 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1690 obstack_free (&objfile->objfile_obstack, type_name);
1691 type = SYMBOL_TYPE (sym);
1692 if (typenums[0] != -1)
1693 *dbx_lookup_type (typenums, objfile) = type;
1698 /* Didn't find the type to which this refers, so we must
1699 be dealing with a forward reference. Allocate a type
1700 structure for it, and keep track of it so we can
1701 fill in the rest of the fields when we get the full
1703 type = dbx_alloc_type (typenums, objfile);
1704 TYPE_CODE (type) = code;
1705 TYPE_NAME (type) = type_name;
1706 INIT_CPLUS_SPECIFIC (type);
1707 TYPE_STUB (type) = 1;
1709 add_undefined_type (type, typenums);
1713 case '-': /* RS/6000 built-in type */
1727 /* We deal with something like t(1,2)=(3,4)=... which
1728 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1730 /* Allocate and enter the typedef type first.
1731 This handles recursive types. */
1732 type = dbx_alloc_type (typenums, objfile);
1733 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1735 struct type *xtype = read_type (pp, objfile);
1739 /* It's being defined as itself. That means it is "void". */
1740 TYPE_CODE (type) = TYPE_CODE_VOID;
1741 TYPE_LENGTH (type) = 1;
1743 else if (type_size >= 0 || is_string)
1745 /* This is the absolute wrong way to construct types. Every
1746 other debug format has found a way around this problem and
1747 the related problems with unnecessarily stubbed types;
1748 someone motivated should attempt to clean up the issue
1749 here as well. Once a type pointed to has been created it
1750 should not be modified.
1752 Well, it's not *absolutely* wrong. Constructing recursive
1753 types (trees, linked lists) necessarily entails modifying
1754 types after creating them. Constructing any loop structure
1755 entails side effects. The Dwarf 2 reader does handle this
1756 more gracefully (it never constructs more than once
1757 instance of a type object, so it doesn't have to copy type
1758 objects wholesale), but it still mutates type objects after
1759 other folks have references to them.
1761 Keep in mind that this circularity/mutation issue shows up
1762 at the source language level, too: C's "incomplete types",
1763 for example. So the proper cleanup, I think, would be to
1764 limit GDB's type smashing to match exactly those required
1765 by the source language. So GDB could have a
1766 "complete_this_type" function, but never create unnecessary
1767 copies of a type otherwise. */
1768 replace_type (type, xtype);
1769 TYPE_NAME (type) = NULL;
1773 TYPE_TARGET_STUB (type) = 1;
1774 TYPE_TARGET_TYPE (type) = xtype;
1779 /* In the following types, we must be sure to overwrite any existing
1780 type that the typenums refer to, rather than allocating a new one
1781 and making the typenums point to the new one. This is because there
1782 may already be pointers to the existing type (if it had been
1783 forward-referenced), and we must change it to a pointer, function,
1784 reference, or whatever, *in-place*. */
1786 case '*': /* Pointer to another type */
1787 type1 = read_type (pp, objfile);
1788 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1791 case '&': /* Reference to another type */
1792 type1 = read_type (pp, objfile);
1793 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile),
1797 case 'f': /* Function returning another type */
1798 type1 = read_type (pp, objfile);
1799 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1802 case 'g': /* Prototyped function. (Sun) */
1804 /* Unresolved questions:
1806 - According to Sun's ``STABS Interface Manual'', for 'f'
1807 and 'F' symbol descriptors, a `0' in the argument type list
1808 indicates a varargs function. But it doesn't say how 'g'
1809 type descriptors represent that info. Someone with access
1810 to Sun's toolchain should try it out.
1812 - According to the comment in define_symbol (search for
1813 `process_prototype_types:'), Sun emits integer arguments as
1814 types which ref themselves --- like `void' types. Do we
1815 have to deal with that here, too? Again, someone with
1816 access to Sun's toolchain should try it out and let us
1819 const char *type_start = (*pp) - 1;
1820 struct type *return_type = read_type (pp, objfile);
1821 struct type *func_type
1822 = make_function_type (return_type,
1823 dbx_lookup_type (typenums, objfile));
1826 struct type_list *next;
1830 while (**pp && **pp != '#')
1832 struct type *arg_type = read_type (pp, objfile);
1833 struct type_list *newobj = XALLOCA (struct type_list);
1834 newobj->type = arg_type;
1835 newobj->next = arg_types;
1843 complaint (_("Prototyped function type didn't "
1844 "end arguments with `#':\n%s"),
1848 /* If there is just one argument whose type is `void', then
1849 that's just an empty argument list. */
1851 && ! arg_types->next
1852 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1855 TYPE_FIELDS (func_type)
1856 = (struct field *) TYPE_ALLOC (func_type,
1857 num_args * sizeof (struct field));
1858 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1861 struct type_list *t;
1863 /* We stuck each argument type onto the front of the list
1864 when we read it, so the list is reversed. Build the
1865 fields array right-to-left. */
1866 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1867 TYPE_FIELD_TYPE (func_type, i) = t->type;
1869 TYPE_NFIELDS (func_type) = num_args;
1870 TYPE_PROTOTYPED (func_type) = 1;
1876 case 'k': /* Const qualifier on some type (Sun) */
1877 type = read_type (pp, objfile);
1878 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1879 dbx_lookup_type (typenums, objfile));
1882 case 'B': /* Volatile qual on some type (Sun) */
1883 type = read_type (pp, objfile);
1884 type = make_cv_type (TYPE_CONST (type), 1, type,
1885 dbx_lookup_type (typenums, objfile));
1889 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1890 { /* Member (class & variable) type */
1891 /* FIXME -- we should be doing smash_to_XXX types here. */
1893 struct type *domain = read_type (pp, objfile);
1894 struct type *memtype;
1897 /* Invalid member type data format. */
1898 return error_type (pp, objfile);
1901 memtype = read_type (pp, objfile);
1902 type = dbx_alloc_type (typenums, objfile);
1903 smash_to_memberptr_type (type, domain, memtype);
1906 /* type attribute */
1908 const char *attr = *pp;
1910 /* Skip to the semicolon. */
1911 while (**pp != ';' && **pp != '\0')
1914 return error_type (pp, objfile);
1916 ++ * pp; /* Skip the semicolon. */
1920 case 's': /* Size attribute */
1921 type_size = atoi (attr + 1);
1926 case 'S': /* String attribute */
1927 /* FIXME: check to see if following type is array? */
1931 case 'V': /* Vector attribute */
1932 /* FIXME: check to see if following type is array? */
1937 /* Ignore unrecognized type attributes, so future compilers
1938 can invent new ones. */
1946 case '#': /* Method (class & fn) type */
1947 if ((*pp)[0] == '#')
1949 /* We'll get the parameter types from the name. */
1950 struct type *return_type;
1953 return_type = read_type (pp, objfile);
1954 if (*(*pp)++ != ';')
1955 complaint (_("invalid (minimal) member type "
1956 "data format at symtab pos %d."),
1958 type = allocate_stub_method (return_type);
1959 if (typenums[0] != -1)
1960 *dbx_lookup_type (typenums, objfile) = type;
1964 struct type *domain = read_type (pp, objfile);
1965 struct type *return_type;
1970 /* Invalid member type data format. */
1971 return error_type (pp, objfile);
1975 return_type = read_type (pp, objfile);
1976 args = read_args (pp, ';', objfile, &nargs, &varargs);
1978 return error_type (pp, objfile);
1979 type = dbx_alloc_type (typenums, objfile);
1980 smash_to_method_type (type, domain, return_type, args,
1985 case 'r': /* Range type */
1986 type = read_range_type (pp, typenums, type_size, objfile);
1987 if (typenums[0] != -1)
1988 *dbx_lookup_type (typenums, objfile) = type;
1993 /* Sun ACC builtin int type */
1994 type = read_sun_builtin_type (pp, typenums, objfile);
1995 if (typenums[0] != -1)
1996 *dbx_lookup_type (typenums, objfile) = type;
2000 case 'R': /* Sun ACC builtin float type */
2001 type = read_sun_floating_type (pp, typenums, objfile);
2002 if (typenums[0] != -1)
2003 *dbx_lookup_type (typenums, objfile) = type;
2006 case 'e': /* Enumeration type */
2007 type = dbx_alloc_type (typenums, objfile);
2008 type = read_enum_type (pp, type, objfile);
2009 if (typenums[0] != -1)
2010 *dbx_lookup_type (typenums, objfile) = type;
2013 case 's': /* Struct type */
2014 case 'u': /* Union type */
2016 enum type_code type_code = TYPE_CODE_UNDEF;
2017 type = dbx_alloc_type (typenums, objfile);
2018 switch (type_descriptor)
2021 type_code = TYPE_CODE_STRUCT;
2024 type_code = TYPE_CODE_UNION;
2027 type = read_struct_type (pp, type, type_code, objfile);
2031 case 'a': /* Array type */
2033 return error_type (pp, objfile);
2036 type = dbx_alloc_type (typenums, objfile);
2037 type = read_array_type (pp, type, objfile);
2039 TYPE_CODE (type) = TYPE_CODE_STRING;
2041 make_vector_type (type);
2044 case 'S': /* Set type */
2045 type1 = read_type (pp, objfile);
2046 type = create_set_type ((struct type *) NULL, type1);
2047 if (typenums[0] != -1)
2048 *dbx_lookup_type (typenums, objfile) = type;
2052 --*pp; /* Go back to the symbol in error. */
2053 /* Particularly important if it was \0! */
2054 return error_type (pp, objfile);
2059 warning (_("GDB internal error, type is NULL in stabsread.c."));
2060 return error_type (pp, objfile);
2063 /* Size specified in a type attribute overrides any other size. */
2064 if (type_size != -1)
2065 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2070 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2071 Return the proper type node for a given builtin type number. */
2073 static const struct objfile_data *rs6000_builtin_type_data;
2075 static struct type *
2076 rs6000_builtin_type (int typenum, struct objfile *objfile)
2078 struct type **negative_types
2079 = (struct type **) objfile_data (objfile, rs6000_builtin_type_data);
2081 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2082 #define NUMBER_RECOGNIZED 34
2083 struct type *rettype = NULL;
2085 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2087 complaint (_("Unknown builtin type %d"), typenum);
2088 return objfile_type (objfile)->builtin_error;
2091 if (!negative_types)
2093 /* This includes an empty slot for type number -0. */
2094 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2095 NUMBER_RECOGNIZED + 1, struct type *);
2096 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2099 if (negative_types[-typenum] != NULL)
2100 return negative_types[-typenum];
2102 #if TARGET_CHAR_BIT != 8
2103 #error This code wrong for TARGET_CHAR_BIT not 8
2104 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2105 that if that ever becomes not true, the correct fix will be to
2106 make the size in the struct type to be in bits, not in units of
2113 /* The size of this and all the other types are fixed, defined
2114 by the debugging format. If there is a type called "int" which
2115 is other than 32 bits, then it should use a new negative type
2116 number (or avoid negative type numbers for that case).
2117 See stabs.texinfo. */
2118 rettype = init_integer_type (objfile, 32, 0, "int");
2121 rettype = init_integer_type (objfile, 8, 0, "char");
2122 TYPE_NOSIGN (rettype) = 1;
2125 rettype = init_integer_type (objfile, 16, 0, "short");
2128 rettype = init_integer_type (objfile, 32, 0, "long");
2131 rettype = init_integer_type (objfile, 8, 1, "unsigned char");
2134 rettype = init_integer_type (objfile, 8, 0, "signed char");
2137 rettype = init_integer_type (objfile, 16, 1, "unsigned short");
2140 rettype = init_integer_type (objfile, 32, 1, "unsigned int");
2143 rettype = init_integer_type (objfile, 32, 1, "unsigned");
2146 rettype = init_integer_type (objfile, 32, 1, "unsigned long");
2149 rettype = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, "void");
2152 /* IEEE single precision (32 bit). */
2153 rettype = init_float_type (objfile, 32, "float",
2154 floatformats_ieee_single);
2157 /* IEEE double precision (64 bit). */
2158 rettype = init_float_type (objfile, 64, "double",
2159 floatformats_ieee_double);
2162 /* This is an IEEE double on the RS/6000, and different machines with
2163 different sizes for "long double" should use different negative
2164 type numbers. See stabs.texinfo. */
2165 rettype = init_float_type (objfile, 64, "long double",
2166 floatformats_ieee_double);
2169 rettype = init_integer_type (objfile, 32, 0, "integer");
2172 rettype = init_boolean_type (objfile, 32, 1, "boolean");
2175 rettype = init_float_type (objfile, 32, "short real",
2176 floatformats_ieee_single);
2179 rettype = init_float_type (objfile, 64, "real",
2180 floatformats_ieee_double);
2183 rettype = init_type (objfile, TYPE_CODE_ERROR, 0, "stringptr");
2186 rettype = init_character_type (objfile, 8, 1, "character");
2189 rettype = init_boolean_type (objfile, 8, 1, "logical*1");
2192 rettype = init_boolean_type (objfile, 16, 1, "logical*2");
2195 rettype = init_boolean_type (objfile, 32, 1, "logical*4");
2198 rettype = init_boolean_type (objfile, 32, 1, "logical");
2201 /* Complex type consisting of two IEEE single precision values. */
2202 rettype = init_complex_type (objfile, "complex",
2203 rs6000_builtin_type (12, objfile));
2206 /* Complex type consisting of two IEEE double precision values. */
2207 rettype = init_complex_type (objfile, "double complex",
2208 rs6000_builtin_type (13, objfile));
2211 rettype = init_integer_type (objfile, 8, 0, "integer*1");
2214 rettype = init_integer_type (objfile, 16, 0, "integer*2");
2217 rettype = init_integer_type (objfile, 32, 0, "integer*4");
2220 rettype = init_character_type (objfile, 16, 0, "wchar");
2223 rettype = init_integer_type (objfile, 64, 0, "long long");
2226 rettype = init_integer_type (objfile, 64, 1, "unsigned long long");
2229 rettype = init_integer_type (objfile, 64, 1, "logical*8");
2232 rettype = init_integer_type (objfile, 64, 0, "integer*8");
2235 negative_types[-typenum] = rettype;
2239 /* This page contains subroutines of read_type. */
2241 /* Wrapper around method_name_from_physname to flag a complaint
2242 if there is an error. */
2245 stabs_method_name_from_physname (const char *physname)
2249 method_name = method_name_from_physname (physname);
2251 if (method_name == NULL)
2253 complaint (_("Method has bad physname %s\n"), physname);
2260 /* Read member function stabs info for C++ classes. The form of each member
2263 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2265 An example with two member functions is:
2267 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2269 For the case of overloaded operators, the format is op$::*.funcs, where
2270 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2271 name (such as `+=') and `.' marks the end of the operator name.
2273 Returns 1 for success, 0 for failure. */
2276 read_member_functions (struct field_info *fip, const char **pp,
2277 struct type *type, struct objfile *objfile)
2284 struct next_fnfield *next;
2285 struct fn_field fn_field;
2288 struct type *look_ahead_type;
2289 struct next_fnfieldlist *new_fnlist;
2290 struct next_fnfield *new_sublist;
2294 /* Process each list until we find something that is not a member function
2295 or find the end of the functions. */
2299 /* We should be positioned at the start of the function name.
2300 Scan forward to find the first ':' and if it is not the
2301 first of a "::" delimiter, then this is not a member function. */
2313 look_ahead_type = NULL;
2316 new_fnlist = XCNEW (struct next_fnfieldlist);
2317 make_cleanup (xfree, new_fnlist);
2319 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2321 /* This is a completely wierd case. In order to stuff in the
2322 names that might contain colons (the usual name delimiter),
2323 Mike Tiemann defined a different name format which is
2324 signalled if the identifier is "op$". In that case, the
2325 format is "op$::XXXX." where XXXX is the name. This is
2326 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2327 /* This lets the user type "break operator+".
2328 We could just put in "+" as the name, but that wouldn't
2330 static char opname[32] = "op$";
2331 char *o = opname + 3;
2333 /* Skip past '::'. */
2336 STABS_CONTINUE (pp, objfile);
2342 main_fn_name = savestring (opname, o - opname);
2348 main_fn_name = savestring (*pp, p - *pp);
2349 /* Skip past '::'. */
2352 new_fnlist->fn_fieldlist.name = main_fn_name;
2356 new_sublist = XCNEW (struct next_fnfield);
2357 make_cleanup (xfree, new_sublist);
2359 /* Check for and handle cretinous dbx symbol name continuation! */
2360 if (look_ahead_type == NULL)
2363 STABS_CONTINUE (pp, objfile);
2365 new_sublist->fn_field.type = read_type (pp, objfile);
2368 /* Invalid symtab info for member function. */
2374 /* g++ version 1 kludge */
2375 new_sublist->fn_field.type = look_ahead_type;
2376 look_ahead_type = NULL;
2386 /* These are methods, not functions. */
2387 if (TYPE_CODE (new_sublist->fn_field.type) == TYPE_CODE_FUNC)
2388 TYPE_CODE (new_sublist->fn_field.type) = TYPE_CODE_METHOD;
2390 gdb_assert (TYPE_CODE (new_sublist->fn_field.type)
2391 == TYPE_CODE_METHOD);
2393 /* If this is just a stub, then we don't have the real name here. */
2394 if (TYPE_STUB (new_sublist->fn_field.type))
2396 if (!TYPE_SELF_TYPE (new_sublist->fn_field.type))
2397 set_type_self_type (new_sublist->fn_field.type, type);
2398 new_sublist->fn_field.is_stub = 1;
2401 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2404 /* Set this member function's visibility fields. */
2407 case VISIBILITY_PRIVATE:
2408 new_sublist->fn_field.is_private = 1;
2410 case VISIBILITY_PROTECTED:
2411 new_sublist->fn_field.is_protected = 1;
2415 STABS_CONTINUE (pp, objfile);
2418 case 'A': /* Normal functions. */
2419 new_sublist->fn_field.is_const = 0;
2420 new_sublist->fn_field.is_volatile = 0;
2423 case 'B': /* `const' member functions. */
2424 new_sublist->fn_field.is_const = 1;
2425 new_sublist->fn_field.is_volatile = 0;
2428 case 'C': /* `volatile' member function. */
2429 new_sublist->fn_field.is_const = 0;
2430 new_sublist->fn_field.is_volatile = 1;
2433 case 'D': /* `const volatile' member function. */
2434 new_sublist->fn_field.is_const = 1;
2435 new_sublist->fn_field.is_volatile = 1;
2438 case '*': /* File compiled with g++ version 1 --
2444 complaint (_("const/volatile indicator missing, got '%c'"),
2454 /* virtual member function, followed by index.
2455 The sign bit is set to distinguish pointers-to-methods
2456 from virtual function indicies. Since the array is
2457 in words, the quantity must be shifted left by 1
2458 on 16 bit machine, and by 2 on 32 bit machine, forcing
2459 the sign bit out, and usable as a valid index into
2460 the array. Remove the sign bit here. */
2461 new_sublist->fn_field.voffset =
2462 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2466 STABS_CONTINUE (pp, objfile);
2467 if (**pp == ';' || **pp == '\0')
2469 /* Must be g++ version 1. */
2470 new_sublist->fn_field.fcontext = 0;
2474 /* Figure out from whence this virtual function came.
2475 It may belong to virtual function table of
2476 one of its baseclasses. */
2477 look_ahead_type = read_type (pp, objfile);
2480 /* g++ version 1 overloaded methods. */
2484 new_sublist->fn_field.fcontext = look_ahead_type;
2493 look_ahead_type = NULL;
2499 /* static member function. */
2501 int slen = strlen (main_fn_name);
2503 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2505 /* For static member functions, we can't tell if they
2506 are stubbed, as they are put out as functions, and not as
2508 GCC v2 emits the fully mangled name if
2509 dbxout.c:flag_minimal_debug is not set, so we have to
2510 detect a fully mangled physname here and set is_stub
2511 accordingly. Fully mangled physnames in v2 start with
2512 the member function name, followed by two underscores.
2513 GCC v3 currently always emits stubbed member functions,
2514 but with fully mangled physnames, which start with _Z. */
2515 if (!(strncmp (new_sublist->fn_field.physname,
2516 main_fn_name, slen) == 0
2517 && new_sublist->fn_field.physname[slen] == '_'
2518 && new_sublist->fn_field.physname[slen + 1] == '_'))
2520 new_sublist->fn_field.is_stub = 1;
2527 complaint (_("member function type missing, got '%c'"),
2529 /* Normal member function. */
2533 /* normal member function. */
2534 new_sublist->fn_field.voffset = 0;
2535 new_sublist->fn_field.fcontext = 0;
2539 new_sublist->next = sublist;
2540 sublist = new_sublist;
2542 STABS_CONTINUE (pp, objfile);
2544 while (**pp != ';' && **pp != '\0');
2547 STABS_CONTINUE (pp, objfile);
2549 /* Skip GCC 3.X member functions which are duplicates of the callable
2550 constructor/destructor. */
2551 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2552 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2553 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2555 xfree (main_fn_name);
2560 int has_destructor = 0, has_other = 0;
2562 struct next_fnfield *tmp_sublist;
2564 /* Various versions of GCC emit various mostly-useless
2565 strings in the name field for special member functions.
2567 For stub methods, we need to defer correcting the name
2568 until we are ready to unstub the method, because the current
2569 name string is used by gdb_mangle_name. The only stub methods
2570 of concern here are GNU v2 operators; other methods have their
2571 names correct (see caveat below).
2573 For non-stub methods, in GNU v3, we have a complete physname.
2574 Therefore we can safely correct the name now. This primarily
2575 affects constructors and destructors, whose name will be
2576 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2577 operators will also have incorrect names; for instance,
2578 "operator int" will be named "operator i" (i.e. the type is
2581 For non-stub methods in GNU v2, we have no easy way to
2582 know if we have a complete physname or not. For most
2583 methods the result depends on the platform (if CPLUS_MARKER
2584 can be `$' or `.', it will use minimal debug information, or
2585 otherwise the full physname will be included).
2587 Rather than dealing with this, we take a different approach.
2588 For v3 mangled names, we can use the full physname; for v2,
2589 we use cplus_demangle_opname (which is actually v2 specific),
2590 because the only interesting names are all operators - once again
2591 barring the caveat below. Skip this process if any method in the
2592 group is a stub, to prevent our fouling up the workings of
2595 The caveat: GCC 2.95.x (and earlier?) put constructors and
2596 destructors in the same method group. We need to split this
2597 into two groups, because they should have different names.
2598 So for each method group we check whether it contains both
2599 routines whose physname appears to be a destructor (the physnames
2600 for and destructors are always provided, due to quirks in v2
2601 mangling) and routines whose physname does not appear to be a
2602 destructor. If so then we break up the list into two halves.
2603 Even if the constructors and destructors aren't in the same group
2604 the destructor will still lack the leading tilde, so that also
2607 So, to summarize what we expect and handle here:
2609 Given Given Real Real Action
2610 method name physname physname method name
2612 __opi [none] __opi__3Foo operator int opname
2614 Foo _._3Foo _._3Foo ~Foo separate and
2616 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2617 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2620 tmp_sublist = sublist;
2621 while (tmp_sublist != NULL)
2623 if (tmp_sublist->fn_field.is_stub)
2625 if (tmp_sublist->fn_field.physname[0] == '_'
2626 && tmp_sublist->fn_field.physname[1] == 'Z')
2629 if (is_destructor_name (tmp_sublist->fn_field.physname))
2634 tmp_sublist = tmp_sublist->next;
2637 if (has_destructor && has_other)
2639 struct next_fnfieldlist *destr_fnlist;
2640 struct next_fnfield *last_sublist;
2642 /* Create a new fn_fieldlist for the destructors. */
2644 destr_fnlist = XCNEW (struct next_fnfieldlist);
2645 make_cleanup (xfree, destr_fnlist);
2647 destr_fnlist->fn_fieldlist.name
2648 = obconcat (&objfile->objfile_obstack, "~",
2649 new_fnlist->fn_fieldlist.name, (char *) NULL);
2651 destr_fnlist->fn_fieldlist.fn_fields =
2652 XOBNEWVEC (&objfile->objfile_obstack,
2653 struct fn_field, has_destructor);
2654 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2655 sizeof (struct fn_field) * has_destructor);
2656 tmp_sublist = sublist;
2657 last_sublist = NULL;
2659 while (tmp_sublist != NULL)
2661 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2663 tmp_sublist = tmp_sublist->next;
2667 destr_fnlist->fn_fieldlist.fn_fields[i++]
2668 = tmp_sublist->fn_field;
2670 last_sublist->next = tmp_sublist->next;
2672 sublist = tmp_sublist->next;
2673 last_sublist = tmp_sublist;
2674 tmp_sublist = tmp_sublist->next;
2677 destr_fnlist->fn_fieldlist.length = has_destructor;
2678 destr_fnlist->next = fip->fnlist;
2679 fip->fnlist = destr_fnlist;
2681 length -= has_destructor;
2685 /* v3 mangling prevents the use of abbreviated physnames,
2686 so we can do this here. There are stubbed methods in v3
2688 - in -gstabs instead of -gstabs+
2689 - or for static methods, which are output as a function type
2690 instead of a method type. */
2691 char *new_method_name =
2692 stabs_method_name_from_physname (sublist->fn_field.physname);
2694 if (new_method_name != NULL
2695 && strcmp (new_method_name,
2696 new_fnlist->fn_fieldlist.name) != 0)
2698 new_fnlist->fn_fieldlist.name = new_method_name;
2699 xfree (main_fn_name);
2702 xfree (new_method_name);
2704 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2706 new_fnlist->fn_fieldlist.name =
2707 obconcat (&objfile->objfile_obstack,
2708 "~", main_fn_name, (char *)NULL);
2709 xfree (main_fn_name);
2713 char dem_opname[256];
2716 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2717 dem_opname, DMGL_ANSI);
2719 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2722 new_fnlist->fn_fieldlist.name
2724 obstack_copy0 (&objfile->objfile_obstack, dem_opname,
2725 strlen (dem_opname)));
2726 xfree (main_fn_name);
2729 new_fnlist->fn_fieldlist.fn_fields
2730 = OBSTACK_CALLOC (&objfile->objfile_obstack, length, fn_field);
2731 for (i = length; (i--, sublist); sublist = sublist->next)
2733 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2736 new_fnlist->fn_fieldlist.length = length;
2737 new_fnlist->next = fip->fnlist;
2738 fip->fnlist = new_fnlist;
2745 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2746 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2747 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2748 memset (TYPE_FN_FIELDLISTS (type), 0,
2749 sizeof (struct fn_fieldlist) * nfn_fields);
2750 TYPE_NFN_FIELDS (type) = nfn_fields;
2756 /* Special GNU C++ name.
2758 Returns 1 for success, 0 for failure. "failure" means that we can't
2759 keep parsing and it's time for error_type(). */
2762 read_cpp_abbrev (struct field_info *fip, const char **pp, struct type *type,
2763 struct objfile *objfile)
2768 struct type *context;
2778 /* At this point, *pp points to something like "22:23=*22...",
2779 where the type number before the ':' is the "context" and
2780 everything after is a regular type definition. Lookup the
2781 type, find it's name, and construct the field name. */
2783 context = read_type (pp, objfile);
2787 case 'f': /* $vf -- a virtual function table pointer */
2788 name = TYPE_NAME (context);
2793 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2794 vptr_name, name, (char *) NULL);
2797 case 'b': /* $vb -- a virtual bsomethingorother */
2798 name = TYPE_NAME (context);
2801 complaint (_("C++ abbreviated type name "
2802 "unknown at symtab pos %d"),
2806 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2807 name, (char *) NULL);
2811 invalid_cpp_abbrev_complaint (*pp);
2812 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2813 "INVALID_CPLUSPLUS_ABBREV",
2818 /* At this point, *pp points to the ':'. Skip it and read the
2824 invalid_cpp_abbrev_complaint (*pp);
2827 fip->list->field.type = read_type (pp, objfile);
2829 (*pp)++; /* Skip the comma. */
2836 SET_FIELD_BITPOS (fip->list->field,
2837 read_huge_number (pp, ';', &nbits, 0));
2841 /* This field is unpacked. */
2842 FIELD_BITSIZE (fip->list->field) = 0;
2843 fip->list->visibility = VISIBILITY_PRIVATE;
2847 invalid_cpp_abbrev_complaint (*pp);
2848 /* We have no idea what syntax an unrecognized abbrev would have, so
2849 better return 0. If we returned 1, we would need to at least advance
2850 *pp to avoid an infinite loop. */
2857 read_one_struct_field (struct field_info *fip, const char **pp, const char *p,
2858 struct type *type, struct objfile *objfile)
2860 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2862 fip->list->field.name
2863 = (const char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
2866 /* This means we have a visibility for a field coming. */
2870 fip->list->visibility = *(*pp)++;
2874 /* normal dbx-style format, no explicit visibility */
2875 fip->list->visibility = VISIBILITY_PUBLIC;
2878 fip->list->field.type = read_type (pp, objfile);
2883 /* Possible future hook for nested types. */
2886 fip->list->field.bitpos = (long) -2; /* nested type */
2896 /* Static class member. */
2897 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2901 else if (**pp != ',')
2903 /* Bad structure-type format. */
2904 stabs_general_complaint ("bad structure-type format");
2908 (*pp)++; /* Skip the comma. */
2913 SET_FIELD_BITPOS (fip->list->field,
2914 read_huge_number (pp, ',', &nbits, 0));
2917 stabs_general_complaint ("bad structure-type format");
2920 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2923 stabs_general_complaint ("bad structure-type format");
2928 if (FIELD_BITPOS (fip->list->field) == 0
2929 && FIELD_BITSIZE (fip->list->field) == 0)
2931 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2932 it is a field which has been optimized out. The correct stab for
2933 this case is to use VISIBILITY_IGNORE, but that is a recent
2934 invention. (2) It is a 0-size array. For example
2935 union { int num; char str[0]; } foo. Printing _("<no value>" for
2936 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2937 will continue to work, and a 0-size array as a whole doesn't
2938 have any contents to print.
2940 I suspect this probably could also happen with gcc -gstabs (not
2941 -gstabs+) for static fields, and perhaps other C++ extensions.
2942 Hopefully few people use -gstabs with gdb, since it is intended
2943 for dbx compatibility. */
2945 /* Ignore this field. */
2946 fip->list->visibility = VISIBILITY_IGNORE;
2950 /* Detect an unpacked field and mark it as such.
2951 dbx gives a bit size for all fields.
2952 Note that forward refs cannot be packed,
2953 and treat enums as if they had the width of ints. */
2955 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2957 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2958 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2959 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2960 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2962 FIELD_BITSIZE (fip->list->field) = 0;
2964 if ((FIELD_BITSIZE (fip->list->field)
2965 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2966 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2967 && FIELD_BITSIZE (fip->list->field)
2968 == gdbarch_int_bit (gdbarch))
2971 FIELD_BITPOS (fip->list->field) % 8 == 0)
2973 FIELD_BITSIZE (fip->list->field) = 0;
2979 /* Read struct or class data fields. They have the form:
2981 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2983 At the end, we see a semicolon instead of a field.
2985 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2988 The optional VISIBILITY is one of:
2990 '/0' (VISIBILITY_PRIVATE)
2991 '/1' (VISIBILITY_PROTECTED)
2992 '/2' (VISIBILITY_PUBLIC)
2993 '/9' (VISIBILITY_IGNORE)
2995 or nothing, for C style fields with public visibility.
2997 Returns 1 for success, 0 for failure. */
3000 read_struct_fields (struct field_info *fip, const char **pp, struct type *type,
3001 struct objfile *objfile)
3004 struct nextfield *newobj;
3006 /* We better set p right now, in case there are no fields at all... */
3010 /* Read each data member type until we find the terminating ';' at the end of
3011 the data member list, or break for some other reason such as finding the
3012 start of the member function list. */
3013 /* Stab string for structure/union does not end with two ';' in
3014 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3016 while (**pp != ';' && **pp != '\0')
3018 STABS_CONTINUE (pp, objfile);
3019 /* Get space to record the next field's data. */
3020 newobj = XCNEW (struct nextfield);
3021 make_cleanup (xfree, newobj);
3023 newobj->next = fip->list;
3026 /* Get the field name. */
3029 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3030 unless the CPLUS_MARKER is followed by an underscore, in
3031 which case it is just the name of an anonymous type, which we
3032 should handle like any other type name. */
3034 if (is_cplus_marker (p[0]) && p[1] != '_')
3036 if (!read_cpp_abbrev (fip, pp, type, objfile))
3041 /* Look for the ':' that separates the field name from the field
3042 values. Data members are delimited by a single ':', while member
3043 functions are delimited by a pair of ':'s. When we hit the member
3044 functions (if any), terminate scan loop and return. */
3046 while (*p != ':' && *p != '\0')
3053 /* Check to see if we have hit the member functions yet. */
3058 read_one_struct_field (fip, pp, p, type, objfile);
3060 if (p[0] == ':' && p[1] == ':')
3062 /* (the deleted) chill the list of fields: the last entry (at
3063 the head) is a partially constructed entry which we now
3065 fip->list = fip->list->next;
3070 /* The stabs for C++ derived classes contain baseclass information which
3071 is marked by a '!' character after the total size. This function is
3072 called when we encounter the baseclass marker, and slurps up all the
3073 baseclass information.
3075 Immediately following the '!' marker is the number of base classes that
3076 the class is derived from, followed by information for each base class.
3077 For each base class, there are two visibility specifiers, a bit offset
3078 to the base class information within the derived class, a reference to
3079 the type for the base class, and a terminating semicolon.
3081 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3083 Baseclass information marker __________________|| | | | | | |
3084 Number of baseclasses __________________________| | | | | | |
3085 Visibility specifiers (2) ________________________| | | | | |
3086 Offset in bits from start of class _________________| | | | |
3087 Type number for base class ___________________________| | | |
3088 Visibility specifiers (2) _______________________________| | |
3089 Offset in bits from start of class ________________________| |
3090 Type number of base class ____________________________________|
3092 Return 1 for success, 0 for (error-type-inducing) failure. */
3098 read_baseclasses (struct field_info *fip, const char **pp, struct type *type,
3099 struct objfile *objfile)
3102 struct nextfield *newobj;
3110 /* Skip the '!' baseclass information marker. */
3114 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3118 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3124 /* Some stupid compilers have trouble with the following, so break
3125 it up into simpler expressions. */
3126 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3127 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3130 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3133 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3134 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3138 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3140 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3142 newobj = XCNEW (struct nextfield);
3143 make_cleanup (xfree, newobj);
3145 newobj->next = fip->list;
3147 FIELD_BITSIZE (newobj->field) = 0; /* This should be an unpacked
3150 STABS_CONTINUE (pp, objfile);
3154 /* Nothing to do. */
3157 SET_TYPE_FIELD_VIRTUAL (type, i);
3160 /* Unknown character. Complain and treat it as non-virtual. */
3162 complaint (_("Unknown virtual character `%c' for baseclass"),
3168 newobj->visibility = *(*pp)++;
3169 switch (newobj->visibility)
3171 case VISIBILITY_PRIVATE:
3172 case VISIBILITY_PROTECTED:
3173 case VISIBILITY_PUBLIC:
3176 /* Bad visibility format. Complain and treat it as
3179 complaint (_("Unknown visibility `%c' for baseclass"),
3180 newobj->visibility);
3181 newobj->visibility = VISIBILITY_PUBLIC;
3188 /* The remaining value is the bit offset of the portion of the object
3189 corresponding to this baseclass. Always zero in the absence of
3190 multiple inheritance. */
3192 SET_FIELD_BITPOS (newobj->field, read_huge_number (pp, ',', &nbits, 0));
3197 /* The last piece of baseclass information is the type of the
3198 base class. Read it, and remember it's type name as this
3201 newobj->field.type = read_type (pp, objfile);
3202 newobj->field.name = TYPE_NAME (newobj->field.type);
3204 /* Skip trailing ';' and bump count of number of fields seen. */
3213 /* The tail end of stabs for C++ classes that contain a virtual function
3214 pointer contains a tilde, a %, and a type number.
3215 The type number refers to the base class (possibly this class itself) which
3216 contains the vtable pointer for the current class.
3218 This function is called when we have parsed all the method declarations,
3219 so we can look for the vptr base class info. */
3222 read_tilde_fields (struct field_info *fip, const char **pp, struct type *type,
3223 struct objfile *objfile)
3227 STABS_CONTINUE (pp, objfile);
3229 /* If we are positioned at a ';', then skip it. */
3239 if (**pp == '=' || **pp == '+' || **pp == '-')
3241 /* Obsolete flags that used to indicate the presence
3242 of constructors and/or destructors. */
3246 /* Read either a '%' or the final ';'. */
3247 if (*(*pp)++ == '%')
3249 /* The next number is the type number of the base class
3250 (possibly our own class) which supplies the vtable for
3251 this class. Parse it out, and search that class to find
3252 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3253 and TYPE_VPTR_FIELDNO. */
3258 t = read_type (pp, objfile);
3260 while (*p != '\0' && *p != ';')
3266 /* Premature end of symbol. */
3270 set_type_vptr_basetype (type, t);
3271 if (type == t) /* Our own class provides vtbl ptr. */
3273 for (i = TYPE_NFIELDS (t) - 1;
3274 i >= TYPE_N_BASECLASSES (t);
3277 const char *name = TYPE_FIELD_NAME (t, i);
3279 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3280 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3282 set_type_vptr_fieldno (type, i);
3286 /* Virtual function table field not found. */
3287 complaint (_("virtual function table pointer "
3288 "not found when defining class `%s'"),
3294 set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t));
3305 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3309 for (n = TYPE_NFN_FIELDS (type);
3310 fip->fnlist != NULL;
3311 fip->fnlist = fip->fnlist->next)
3313 --n; /* Circumvent Sun3 compiler bug. */
3314 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3319 /* Create the vector of fields, and record how big it is.
3320 We need this info to record proper virtual function table information
3321 for this class's virtual functions. */
3324 attach_fields_to_type (struct field_info *fip, struct type *type,
3325 struct objfile *objfile)
3328 int non_public_fields = 0;
3329 struct nextfield *scan;
3331 /* Count up the number of fields that we have, as well as taking note of
3332 whether or not there are any non-public fields, which requires us to
3333 allocate and build the private_field_bits and protected_field_bits
3336 for (scan = fip->list; scan != NULL; scan = scan->next)
3339 if (scan->visibility != VISIBILITY_PUBLIC)
3341 non_public_fields++;
3345 /* Now we know how many fields there are, and whether or not there are any
3346 non-public fields. Record the field count, allocate space for the
3347 array of fields, and create blank visibility bitfields if necessary. */
3349 TYPE_NFIELDS (type) = nfields;
3350 TYPE_FIELDS (type) = (struct field *)
3351 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3352 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3354 if (non_public_fields)
3356 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3358 TYPE_FIELD_PRIVATE_BITS (type) =
3359 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3360 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3362 TYPE_FIELD_PROTECTED_BITS (type) =
3363 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3364 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3366 TYPE_FIELD_IGNORE_BITS (type) =
3367 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3368 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3371 /* Copy the saved-up fields into the field vector. Start from the
3372 head of the list, adding to the tail of the field array, so that
3373 they end up in the same order in the array in which they were
3374 added to the list. */
3376 while (nfields-- > 0)
3378 TYPE_FIELD (type, nfields) = fip->list->field;
3379 switch (fip->list->visibility)
3381 case VISIBILITY_PRIVATE:
3382 SET_TYPE_FIELD_PRIVATE (type, nfields);
3385 case VISIBILITY_PROTECTED:
3386 SET_TYPE_FIELD_PROTECTED (type, nfields);
3389 case VISIBILITY_IGNORE:
3390 SET_TYPE_FIELD_IGNORE (type, nfields);
3393 case VISIBILITY_PUBLIC:
3397 /* Unknown visibility. Complain and treat it as public. */
3399 complaint (_("Unknown visibility `%c' for field"),
3400 fip->list->visibility);
3404 fip->list = fip->list->next;
3410 /* Complain that the compiler has emitted more than one definition for the
3411 structure type TYPE. */
3413 complain_about_struct_wipeout (struct type *type)
3415 const char *name = "";
3416 const char *kind = "";
3418 if (TYPE_NAME (type))
3420 name = TYPE_NAME (type);
3421 switch (TYPE_CODE (type))
3423 case TYPE_CODE_STRUCT: kind = "struct "; break;
3424 case TYPE_CODE_UNION: kind = "union "; break;
3425 case TYPE_CODE_ENUM: kind = "enum "; break;
3435 complaint (_("struct/union type gets multiply defined: %s%s"), kind, name);
3438 /* Set the length for all variants of a same main_type, which are
3439 connected in the closed chain.
3441 This is something that needs to be done when a type is defined *after*
3442 some cross references to this type have already been read. Consider
3443 for instance the following scenario where we have the following two
3446 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3447 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3449 A stubbed version of type dummy is created while processing the first
3450 stabs entry. The length of that type is initially set to zero, since
3451 it is unknown at this point. Also, a "constant" variation of type
3452 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3455 The second stabs entry allows us to replace the stubbed definition
3456 with the real definition. However, we still need to adjust the length
3457 of the "constant" variation of that type, as its length was left
3458 untouched during the main type replacement... */
3461 set_length_in_type_chain (struct type *type)
3463 struct type *ntype = TYPE_CHAIN (type);
3465 while (ntype != type)
3467 if (TYPE_LENGTH(ntype) == 0)
3468 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3470 complain_about_struct_wipeout (ntype);
3471 ntype = TYPE_CHAIN (ntype);
3475 /* Read the description of a structure (or union type) and return an object
3476 describing the type.
3478 PP points to a character pointer that points to the next unconsumed token
3479 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3480 *PP will point to "4a:1,0,32;;".
3482 TYPE points to an incomplete type that needs to be filled in.
3484 OBJFILE points to the current objfile from which the stabs information is
3485 being read. (Note that it is redundant in that TYPE also contains a pointer
3486 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3489 static struct type *
3490 read_struct_type (const char **pp, struct type *type, enum type_code type_code,
3491 struct objfile *objfile)
3493 struct cleanup *back_to;
3494 struct field_info fi;
3499 /* When describing struct/union/class types in stabs, G++ always drops
3500 all qualifications from the name. So if you've got:
3501 struct A { ... struct B { ... }; ... };
3502 then G++ will emit stabs for `struct A::B' that call it simply
3503 `struct B'. Obviously, if you've got a real top-level definition for
3504 `struct B', or other nested definitions, this is going to cause
3507 Obviously, GDB can't fix this by itself, but it can at least avoid
3508 scribbling on existing structure type objects when new definitions
3510 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3511 || TYPE_STUB (type)))
3513 complain_about_struct_wipeout (type);
3515 /* It's probably best to return the type unchanged. */
3519 back_to = make_cleanup (null_cleanup, 0);
3521 INIT_CPLUS_SPECIFIC (type);
3522 TYPE_CODE (type) = type_code;
3523 TYPE_STUB (type) = 0;
3525 /* First comes the total size in bytes. */
3530 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3533 do_cleanups (back_to);
3534 return error_type (pp, objfile);
3536 set_length_in_type_chain (type);
3539 /* Now read the baseclasses, if any, read the regular C struct or C++
3540 class member fields, attach the fields to the type, read the C++
3541 member functions, attach them to the type, and then read any tilde
3542 field (baseclass specifier for the class holding the main vtable). */
3544 if (!read_baseclasses (&fi, pp, type, objfile)
3545 || !read_struct_fields (&fi, pp, type, objfile)
3546 || !attach_fields_to_type (&fi, type, objfile)
3547 || !read_member_functions (&fi, pp, type, objfile)
3548 || !attach_fn_fields_to_type (&fi, type)
3549 || !read_tilde_fields (&fi, pp, type, objfile))
3551 type = error_type (pp, objfile);
3554 do_cleanups (back_to);
3558 /* Read a definition of an array type,
3559 and create and return a suitable type object.
3560 Also creates a range type which represents the bounds of that
3563 static struct type *
3564 read_array_type (const char **pp, struct type *type,
3565 struct objfile *objfile)
3567 struct type *index_type, *element_type, *range_type;
3572 /* Format of an array type:
3573 "ar<index type>;lower;upper;<array_contents_type>".
3574 OS9000: "arlower,upper;<array_contents_type>".
3576 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3577 for these, produce a type like float[][]. */
3580 index_type = read_type (pp, objfile);
3582 /* Improper format of array type decl. */
3583 return error_type (pp, objfile);
3587 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3592 lower = read_huge_number (pp, ';', &nbits, 0);
3595 return error_type (pp, objfile);
3597 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3602 upper = read_huge_number (pp, ';', &nbits, 0);
3604 return error_type (pp, objfile);
3606 element_type = read_type (pp, objfile);
3615 create_static_range_type ((struct type *) NULL, index_type, lower, upper);
3616 type = create_array_type (type, element_type, range_type);
3622 /* Read a definition of an enumeration type,
3623 and create and return a suitable type object.
3624 Also defines the symbols that represent the values of the type. */
3626 static struct type *
3627 read_enum_type (const char **pp, struct type *type,
3628 struct objfile *objfile)
3630 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3636 struct pending **symlist;
3637 struct pending *osyms, *syms;
3640 int unsigned_enum = 1;
3643 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3644 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3645 to do? For now, force all enum values to file scope. */
3646 if (within_function)
3647 symlist = get_local_symbols ();
3650 symlist = get_file_symbols ();
3652 o_nsyms = osyms ? osyms->nsyms : 0;
3654 /* The aix4 compiler emits an extra field before the enum members;
3655 my guess is it's a type of some sort. Just ignore it. */
3658 /* Skip over the type. */
3662 /* Skip over the colon. */
3666 /* Read the value-names and their values.
3667 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3668 A semicolon or comma instead of a NAME means the end. */
3669 while (**pp && **pp != ';' && **pp != ',')
3671 STABS_CONTINUE (pp, objfile);
3675 name = (char *) obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
3677 n = read_huge_number (pp, ',', &nbits, 0);
3679 return error_type (pp, objfile);
3681 sym = allocate_symbol (objfile);
3682 SYMBOL_SET_LINKAGE_NAME (sym, name);
3683 SYMBOL_SET_LANGUAGE (sym, get_current_subfile ()->language,
3684 &objfile->objfile_obstack);
3685 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
3686 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3687 SYMBOL_VALUE (sym) = n;
3690 add_symbol_to_list (sym, symlist);
3695 (*pp)++; /* Skip the semicolon. */
3697 /* Now fill in the fields of the type-structure. */
3699 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3700 set_length_in_type_chain (type);
3701 TYPE_CODE (type) = TYPE_CODE_ENUM;
3702 TYPE_STUB (type) = 0;
3704 TYPE_UNSIGNED (type) = 1;
3705 TYPE_NFIELDS (type) = nsyms;
3706 TYPE_FIELDS (type) = (struct field *)
3707 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3708 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3710 /* Find the symbols for the values and put them into the type.
3711 The symbols can be found in the symlist that we put them on
3712 to cause them to be defined. osyms contains the old value
3713 of that symlist; everything up to there was defined by us. */
3714 /* Note that we preserve the order of the enum constants, so
3715 that in something like "enum {FOO, LAST_THING=FOO}" we print
3716 FOO, not LAST_THING. */
3718 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3720 int last = syms == osyms ? o_nsyms : 0;
3721 int j = syms->nsyms;
3723 for (; --j >= last; --n)
3725 struct symbol *xsym = syms->symbol[j];
3727 SYMBOL_TYPE (xsym) = type;
3728 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3729 SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
3730 TYPE_FIELD_BITSIZE (type, n) = 0;
3739 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3740 typedefs in every file (for int, long, etc):
3742 type = b <signed> <width> <format type>; <offset>; <nbits>
3744 optional format type = c or b for char or boolean.
3745 offset = offset from high order bit to start bit of type.
3746 width is # bytes in object of this type, nbits is # bits in type.
3748 The width/offset stuff appears to be for small objects stored in
3749 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3752 static struct type *
3753 read_sun_builtin_type (const char **pp, int typenums[2], struct objfile *objfile)
3758 int boolean_type = 0;
3769 return error_type (pp, objfile);
3773 /* For some odd reason, all forms of char put a c here. This is strange
3774 because no other type has this honor. We can safely ignore this because
3775 we actually determine 'char'acterness by the number of bits specified in
3777 Boolean forms, e.g Fortran logical*X, put a b here. */
3781 else if (**pp == 'b')
3787 /* The first number appears to be the number of bytes occupied
3788 by this type, except that unsigned short is 4 instead of 2.
3789 Since this information is redundant with the third number,
3790 we will ignore it. */
3791 read_huge_number (pp, ';', &nbits, 0);
3793 return error_type (pp, objfile);
3795 /* The second number is always 0, so ignore it too. */
3796 read_huge_number (pp, ';', &nbits, 0);
3798 return error_type (pp, objfile);
3800 /* The third number is the number of bits for this type. */
3801 type_bits = read_huge_number (pp, 0, &nbits, 0);
3803 return error_type (pp, objfile);
3804 /* The type *should* end with a semicolon. If it are embedded
3805 in a larger type the semicolon may be the only way to know where
3806 the type ends. If this type is at the end of the stabstring we
3807 can deal with the omitted semicolon (but we don't have to like
3808 it). Don't bother to complain(), Sun's compiler omits the semicolon
3815 struct type *type = init_type (objfile, TYPE_CODE_VOID,
3816 TARGET_CHAR_BIT, NULL);
3818 TYPE_UNSIGNED (type) = 1;
3823 return init_boolean_type (objfile, type_bits, unsigned_type, NULL);
3825 return init_integer_type (objfile, type_bits, unsigned_type, NULL);
3828 static struct type *
3829 read_sun_floating_type (const char **pp, int typenums[2],
3830 struct objfile *objfile)
3835 struct type *rettype;
3837 /* The first number has more details about the type, for example
3839 details = read_huge_number (pp, ';', &nbits, 0);
3841 return error_type (pp, objfile);
3843 /* The second number is the number of bytes occupied by this type. */
3844 nbytes = read_huge_number (pp, ';', &nbits, 0);
3846 return error_type (pp, objfile);
3848 nbits = nbytes * TARGET_CHAR_BIT;
3850 if (details == NF_COMPLEX || details == NF_COMPLEX16
3851 || details == NF_COMPLEX32)
3853 rettype = dbx_init_float_type (objfile, nbits / 2);
3854 return init_complex_type (objfile, NULL, rettype);
3857 return dbx_init_float_type (objfile, nbits);
3860 /* Read a number from the string pointed to by *PP.
3861 The value of *PP is advanced over the number.
3862 If END is nonzero, the character that ends the
3863 number must match END, or an error happens;
3864 and that character is skipped if it does match.
3865 If END is zero, *PP is left pointing to that character.
3867 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3868 the number is represented in an octal representation, assume that
3869 it is represented in a 2's complement representation with a size of
3870 TWOS_COMPLEMENT_BITS.
3872 If the number fits in a long, set *BITS to 0 and return the value.
3873 If not, set *BITS to be the number of bits in the number and return 0.
3875 If encounter garbage, set *BITS to -1 and return 0. */
3878 read_huge_number (const char **pp, int end, int *bits,
3879 int twos_complement_bits)
3881 const char *p = *pp;
3890 int twos_complement_representation = 0;
3898 /* Leading zero means octal. GCC uses this to output values larger
3899 than an int (because that would be hard in decimal). */
3906 /* Skip extra zeros. */
3910 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3912 /* Octal, possibly signed. Check if we have enough chars for a
3918 while ((c = *p1) >= '0' && c < '8')
3922 if (len > twos_complement_bits / 3
3923 || (twos_complement_bits % 3 == 0
3924 && len == twos_complement_bits / 3))
3926 /* Ok, we have enough characters for a signed value, check
3927 for signness by testing if the sign bit is set. */
3928 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3930 if (c & (1 << sign_bit))
3932 /* Definitely signed. */
3933 twos_complement_representation = 1;
3939 upper_limit = LONG_MAX / radix;
3941 while ((c = *p++) >= '0' && c < ('0' + radix))
3943 if (n <= upper_limit)
3945 if (twos_complement_representation)
3947 /* Octal, signed, twos complement representation. In
3948 this case, n is the corresponding absolute value. */
3951 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3963 /* unsigned representation */
3965 n += c - '0'; /* FIXME this overflows anyway. */
3971 /* This depends on large values being output in octal, which is
3978 /* Ignore leading zeroes. */
3982 else if (c == '2' || c == '3')
4003 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
4005 /* We were supposed to parse a number with maximum
4006 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4017 /* Large decimal constants are an error (because it is hard to
4018 count how many bits are in them). */
4024 /* -0x7f is the same as 0x80. So deal with it by adding one to
4025 the number of bits. Two's complement represention octals
4026 can't have a '-' in front. */
4027 if (sign == -1 && !twos_complement_representation)
4038 /* It's *BITS which has the interesting information. */
4042 static struct type *
4043 read_range_type (const char **pp, int typenums[2], int type_size,
4044 struct objfile *objfile)
4046 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4047 const char *orig_pp = *pp;
4052 struct type *result_type;
4053 struct type *index_type = NULL;
4055 /* First comes a type we are a subrange of.
4056 In C it is usually 0, 1 or the type being defined. */
4057 if (read_type_number (pp, rangenums) != 0)
4058 return error_type (pp, objfile);
4059 self_subrange = (rangenums[0] == typenums[0] &&
4060 rangenums[1] == typenums[1]);
4065 index_type = read_type (pp, objfile);
4068 /* A semicolon should now follow; skip it. */
4072 /* The remaining two operands are usually lower and upper bounds
4073 of the range. But in some special cases they mean something else. */
4074 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4075 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4077 if (n2bits == -1 || n3bits == -1)
4078 return error_type (pp, objfile);
4081 goto handle_true_range;
4083 /* If limits are huge, must be large integral type. */
4084 if (n2bits != 0 || n3bits != 0)
4086 char got_signed = 0;
4087 char got_unsigned = 0;
4088 /* Number of bits in the type. */
4091 /* If a type size attribute has been specified, the bounds of
4092 the range should fit in this size. If the lower bounds needs
4093 more bits than the upper bound, then the type is signed. */
4094 if (n2bits <= type_size && n3bits <= type_size)
4096 if (n2bits == type_size && n2bits > n3bits)
4102 /* Range from 0 to <large number> is an unsigned large integral type. */
4103 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4108 /* Range from <large number> to <large number>-1 is a large signed
4109 integral type. Take care of the case where <large number> doesn't
4110 fit in a long but <large number>-1 does. */
4111 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4112 || (n2bits != 0 && n3bits == 0
4113 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4120 if (got_signed || got_unsigned)
4121 return init_integer_type (objfile, nbits, got_unsigned, NULL);
4123 return error_type (pp, objfile);
4126 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4127 if (self_subrange && n2 == 0 && n3 == 0)
4128 return init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL);
4130 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4131 is the width in bytes.
4133 Fortran programs appear to use this for complex types also. To
4134 distinguish between floats and complex, g77 (and others?) seem
4135 to use self-subranges for the complexes, and subranges of int for
4138 Also note that for complexes, g77 sets n2 to the size of one of
4139 the member floats, not the whole complex beast. My guess is that
4140 this was to work well with pre-COMPLEX versions of gdb. */
4142 if (n3 == 0 && n2 > 0)
4144 struct type *float_type
4145 = dbx_init_float_type (objfile, n2 * TARGET_CHAR_BIT);
4148 return init_complex_type (objfile, NULL, float_type);
4153 /* If the upper bound is -1, it must really be an unsigned integral. */
4155 else if (n2 == 0 && n3 == -1)
4157 int bits = type_size;
4161 /* We don't know its size. It is unsigned int or unsigned
4162 long. GCC 2.3.3 uses this for long long too, but that is
4163 just a GDB 3.5 compatibility hack. */
4164 bits = gdbarch_int_bit (gdbarch);
4167 return init_integer_type (objfile, bits, 1, NULL);
4170 /* Special case: char is defined (Who knows why) as a subrange of
4171 itself with range 0-127. */
4172 else if (self_subrange && n2 == 0 && n3 == 127)
4174 struct type *type = init_integer_type (objfile, TARGET_CHAR_BIT,
4176 TYPE_NOSIGN (type) = 1;
4179 /* We used to do this only for subrange of self or subrange of int. */
4182 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4183 "unsigned long", and we already checked for that,
4184 so don't need to test for it here. */
4187 /* n3 actually gives the size. */
4188 return init_integer_type (objfile, -n3 * TARGET_CHAR_BIT, 1, NULL);
4190 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4191 unsigned n-byte integer. But do require n to be a power of
4192 two; we don't want 3- and 5-byte integers flying around. */
4198 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4201 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4202 return init_integer_type (objfile, bytes * TARGET_CHAR_BIT, 1, NULL);
4205 /* I think this is for Convex "long long". Since I don't know whether
4206 Convex sets self_subrange, I also accept that particular size regardless
4207 of self_subrange. */
4208 else if (n3 == 0 && n2 < 0
4210 || n2 == -gdbarch_long_long_bit
4211 (gdbarch) / TARGET_CHAR_BIT))
4212 return init_integer_type (objfile, -n2 * TARGET_CHAR_BIT, 0, NULL);
4213 else if (n2 == -n3 - 1)
4216 return init_integer_type (objfile, 8, 0, NULL);
4218 return init_integer_type (objfile, 16, 0, NULL);
4219 if (n3 == 0x7fffffff)
4220 return init_integer_type (objfile, 32, 0, NULL);
4223 /* We have a real range type on our hands. Allocate space and
4224 return a real pointer. */
4228 index_type = objfile_type (objfile)->builtin_int;
4230 index_type = *dbx_lookup_type (rangenums, objfile);
4231 if (index_type == NULL)
4233 /* Does this actually ever happen? Is that why we are worrying
4234 about dealing with it rather than just calling error_type? */
4236 complaint (_("base type %d of range type is not defined"), rangenums[1]);
4238 index_type = objfile_type (objfile)->builtin_int;
4242 = create_static_range_type ((struct type *) NULL, index_type, n2, n3);
4243 return (result_type);
4246 /* Read in an argument list. This is a list of types, separated by commas
4247 and terminated with END. Return the list of types read in, or NULL
4248 if there is an error. */
4250 static struct field *
4251 read_args (const char **pp, int end, struct objfile *objfile, int *nargsp,
4254 /* FIXME! Remove this arbitrary limit! */
4255 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4262 /* Invalid argument list: no ','. */
4265 STABS_CONTINUE (pp, objfile);
4266 types[n++] = read_type (pp, objfile);
4268 (*pp)++; /* get past `end' (the ':' character). */
4272 /* We should read at least the THIS parameter here. Some broken stabs
4273 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4274 have been present ";-16,(0,43)" reference instead. This way the
4275 excessive ";" marker prematurely stops the parameters parsing. */
4277 complaint (_("Invalid (empty) method arguments"));
4280 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4288 rval = XCNEWVEC (struct field, n);
4289 for (i = 0; i < n; i++)
4290 rval[i].type = types[i];
4295 /* Common block handling. */
4297 /* List of symbols declared since the last BCOMM. This list is a tail
4298 of local_symbols. When ECOMM is seen, the symbols on the list
4299 are noted so their proper addresses can be filled in later,
4300 using the common block base address gotten from the assembler
4303 static struct pending *common_block;
4304 static int common_block_i;
4306 /* Name of the current common block. We get it from the BCOMM instead of the
4307 ECOMM to match IBM documentation (even though IBM puts the name both places
4308 like everyone else). */
4309 static char *common_block_name;
4311 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4312 to remain after this function returns. */
4315 common_block_start (const char *name, struct objfile *objfile)
4317 if (common_block_name != NULL)
4319 complaint (_("Invalid symbol data: common block within common block"));
4321 common_block = *get_local_symbols ();
4322 common_block_i = common_block ? common_block->nsyms : 0;
4323 common_block_name = (char *) obstack_copy0 (&objfile->objfile_obstack, name,
4327 /* Process a N_ECOMM symbol. */
4330 common_block_end (struct objfile *objfile)
4332 /* Symbols declared since the BCOMM are to have the common block
4333 start address added in when we know it. common_block and
4334 common_block_i point to the first symbol after the BCOMM in
4335 the local_symbols list; copy the list and hang it off the
4336 symbol for the common block name for later fixup. */
4339 struct pending *newobj = 0;
4340 struct pending *next;
4343 if (common_block_name == NULL)
4345 complaint (_("ECOMM symbol unmatched by BCOMM"));
4349 sym = allocate_symbol (objfile);
4350 /* Note: common_block_name already saved on objfile_obstack. */
4351 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4352 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
4354 /* Now we copy all the symbols which have been defined since the BCOMM. */
4356 /* Copy all the struct pendings before common_block. */
4357 for (next = *get_local_symbols ();
4358 next != NULL && next != common_block;
4361 for (j = 0; j < next->nsyms; j++)
4362 add_symbol_to_list (next->symbol[j], &newobj);
4365 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4366 NULL, it means copy all the local symbols (which we already did
4369 if (common_block != NULL)
4370 for (j = common_block_i; j < common_block->nsyms; j++)
4371 add_symbol_to_list (common_block->symbol[j], &newobj);
4373 SYMBOL_TYPE (sym) = (struct type *) newobj;
4375 /* Should we be putting local_symbols back to what it was?
4378 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4379 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4380 global_sym_chain[i] = sym;
4381 common_block_name = NULL;
4384 /* Add a common block's start address to the offset of each symbol
4385 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4386 the common block name). */
4389 fix_common_block (struct symbol *sym, CORE_ADDR valu)
4391 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4393 for (; next; next = next->next)
4397 for (j = next->nsyms - 1; j >= 0; j--)
4398 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4404 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4405 See add_undefined_type for more details. */
4408 add_undefined_type_noname (struct type *type, int typenums[2])
4412 nat.typenums[0] = typenums [0];
4413 nat.typenums[1] = typenums [1];
4416 if (noname_undefs_length == noname_undefs_allocated)
4418 noname_undefs_allocated *= 2;
4419 noname_undefs = (struct nat *)
4420 xrealloc ((char *) noname_undefs,
4421 noname_undefs_allocated * sizeof (struct nat));
4423 noname_undefs[noname_undefs_length++] = nat;
4426 /* Add TYPE to the UNDEF_TYPES vector.
4427 See add_undefined_type for more details. */
4430 add_undefined_type_1 (struct type *type)
4432 if (undef_types_length == undef_types_allocated)
4434 undef_types_allocated *= 2;
4435 undef_types = (struct type **)
4436 xrealloc ((char *) undef_types,
4437 undef_types_allocated * sizeof (struct type *));
4439 undef_types[undef_types_length++] = type;
4442 /* What about types defined as forward references inside of a small lexical
4444 /* Add a type to the list of undefined types to be checked through
4445 once this file has been read in.
4447 In practice, we actually maintain two such lists: The first list
4448 (UNDEF_TYPES) is used for types whose name has been provided, and
4449 concerns forward references (eg 'xs' or 'xu' forward references);
4450 the second list (NONAME_UNDEFS) is used for types whose name is
4451 unknown at creation time, because they were referenced through
4452 their type number before the actual type was declared.
4453 This function actually adds the given type to the proper list. */
4456 add_undefined_type (struct type *type, int typenums[2])
4458 if (TYPE_NAME (type) == NULL)
4459 add_undefined_type_noname (type, typenums);
4461 add_undefined_type_1 (type);
4464 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4467 cleanup_undefined_types_noname (struct objfile *objfile)
4471 for (i = 0; i < noname_undefs_length; i++)
4473 struct nat nat = noname_undefs[i];
4476 type = dbx_lookup_type (nat.typenums, objfile);
4477 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4479 /* The instance flags of the undefined type are still unset,
4480 and needs to be copied over from the reference type.
4481 Since replace_type expects them to be identical, we need
4482 to set these flags manually before hand. */
4483 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4484 replace_type (nat.type, *type);
4488 noname_undefs_length = 0;
4491 /* Go through each undefined type, see if it's still undefined, and fix it
4492 up if possible. We have two kinds of undefined types:
4494 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4495 Fix: update array length using the element bounds
4496 and the target type's length.
4497 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4498 yet defined at the time a pointer to it was made.
4499 Fix: Do a full lookup on the struct/union tag. */
4502 cleanup_undefined_types_1 (void)
4506 /* Iterate over every undefined type, and look for a symbol whose type
4507 matches our undefined type. The symbol matches if:
4508 1. It is a typedef in the STRUCT domain;
4509 2. It has the same name, and same type code;
4510 3. The instance flags are identical.
4512 It is important to check the instance flags, because we have seen
4513 examples where the debug info contained definitions such as:
4515 "foo_t:t30=B31=xefoo_t:"
4517 In this case, we have created an undefined type named "foo_t" whose
4518 instance flags is null (when processing "xefoo_t"), and then created
4519 another type with the same name, but with different instance flags
4520 ('B' means volatile). I think that the definition above is wrong,
4521 since the same type cannot be volatile and non-volatile at the same
4522 time, but we need to be able to cope with it when it happens. The
4523 approach taken here is to treat these two types as different. */
4525 for (type = undef_types; type < undef_types + undef_types_length; type++)
4527 switch (TYPE_CODE (*type))
4530 case TYPE_CODE_STRUCT:
4531 case TYPE_CODE_UNION:
4532 case TYPE_CODE_ENUM:
4534 /* Check if it has been defined since. Need to do this here
4535 as well as in check_typedef to deal with the (legitimate in
4536 C though not C++) case of several types with the same name
4537 in different source files. */
4538 if (TYPE_STUB (*type))
4540 struct pending *ppt;
4542 /* Name of the type, without "struct" or "union". */
4543 const char *type_name = TYPE_NAME (*type);
4545 if (type_name == NULL)
4547 complaint (_("need a type name"));
4550 for (ppt = *get_file_symbols (); ppt; ppt = ppt->next)
4552 for (i = 0; i < ppt->nsyms; i++)
4554 struct symbol *sym = ppt->symbol[i];
4556 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4557 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4558 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4560 && (TYPE_INSTANCE_FLAGS (*type) ==
4561 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4562 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4564 replace_type (*type, SYMBOL_TYPE (sym));
4573 complaint (_("forward-referenced types left unresolved, "
4581 undef_types_length = 0;
4584 /* Try to fix all the undefined types we ecountered while processing
4588 cleanup_undefined_stabs_types (struct objfile *objfile)
4590 cleanup_undefined_types_1 ();
4591 cleanup_undefined_types_noname (objfile);
4594 /* See stabsread.h. */
4597 scan_file_globals (struct objfile *objfile)
4600 struct minimal_symbol *msymbol;
4601 struct symbol *sym, *prev;
4602 struct objfile *resolve_objfile;
4604 /* SVR4 based linkers copy referenced global symbols from shared
4605 libraries to the main executable.
4606 If we are scanning the symbols for a shared library, try to resolve
4607 them from the minimal symbols of the main executable first. */
4609 if (symfile_objfile && objfile != symfile_objfile)
4610 resolve_objfile = symfile_objfile;
4612 resolve_objfile = objfile;
4616 /* Avoid expensive loop through all minimal symbols if there are
4617 no unresolved symbols. */
4618 for (hash = 0; hash < HASHSIZE; hash++)
4620 if (global_sym_chain[hash])
4623 if (hash >= HASHSIZE)
4626 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4630 /* Skip static symbols. */
4631 switch (MSYMBOL_TYPE (msymbol))
4643 /* Get the hash index and check all the symbols
4644 under that hash index. */
4646 hash = hashname (MSYMBOL_LINKAGE_NAME (msymbol));
4648 for (sym = global_sym_chain[hash]; sym;)
4650 if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol),
4651 SYMBOL_LINKAGE_NAME (sym)) == 0)
4653 /* Splice this symbol out of the hash chain and
4654 assign the value we have to it. */
4657 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4661 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4664 /* Check to see whether we need to fix up a common block. */
4665 /* Note: this code might be executed several times for
4666 the same symbol if there are multiple references. */
4669 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4671 fix_common_block (sym,
4672 MSYMBOL_VALUE_ADDRESS (resolve_objfile,
4677 SYMBOL_VALUE_ADDRESS (sym)
4678 = MSYMBOL_VALUE_ADDRESS (resolve_objfile, msymbol);
4680 SYMBOL_SECTION (sym) = MSYMBOL_SECTION (msymbol);
4685 sym = SYMBOL_VALUE_CHAIN (prev);
4689 sym = global_sym_chain[hash];
4695 sym = SYMBOL_VALUE_CHAIN (sym);
4699 if (resolve_objfile == objfile)
4701 resolve_objfile = objfile;
4704 /* Change the storage class of any remaining unresolved globals to
4705 LOC_UNRESOLVED and remove them from the chain. */
4706 for (hash = 0; hash < HASHSIZE; hash++)
4708 sym = global_sym_chain[hash];
4712 sym = SYMBOL_VALUE_CHAIN (sym);
4714 /* Change the symbol address from the misleading chain value
4716 SYMBOL_VALUE_ADDRESS (prev) = 0;
4718 /* Complain about unresolved common block symbols. */
4719 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4720 SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
4722 complaint (_("%s: common block `%s' from "
4723 "global_sym_chain unresolved"),
4724 objfile_name (objfile), SYMBOL_PRINT_NAME (prev));
4727 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4730 /* Initialize anything that needs initializing when starting to read
4731 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4735 stabsread_init (void)
4739 /* Initialize anything that needs initializing when a completely new
4740 symbol file is specified (not just adding some symbols from another
4741 file, e.g. a shared library). */
4744 stabsread_new_init (void)
4746 /* Empty the hash table of global syms looking for values. */
4747 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4750 /* Initialize anything that needs initializing at the same time as
4751 start_symtab() is called. */
4756 global_stabs = NULL; /* AIX COFF */
4757 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4758 n_this_object_header_files = 1;
4759 type_vector_length = 0;
4760 type_vector = (struct type **) 0;
4761 within_function = 0;
4763 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4764 common_block_name = NULL;
4767 /* Call after end_symtab(). */
4774 xfree (type_vector);
4777 type_vector_length = 0;
4778 previous_stab_code = 0;
4782 finish_global_stabs (struct objfile *objfile)
4786 patch_block_stabs (*get_global_symbols (), global_stabs, objfile);
4787 xfree (global_stabs);
4788 global_stabs = NULL;
4792 /* Find the end of the name, delimited by a ':', but don't match
4793 ObjC symbols which look like -[Foo bar::]:bla. */
4795 find_name_end (const char *name)
4797 const char *s = name;
4799 if (s[0] == '-' || *s == '+')
4801 /* Must be an ObjC method symbol. */
4804 error (_("invalid symbol name \"%s\""), name);
4806 s = strchr (s, ']');
4809 error (_("invalid symbol name \"%s\""), name);
4811 return strchr (s, ':');
4815 return strchr (s, ':');
4819 /* See stabsread.h. */
4822 hashname (const char *name)
4824 return hash (name, strlen (name)) % HASHSIZE;
4827 /* Initializer for this module. */
4830 _initialize_stabsread (void)
4832 rs6000_builtin_type_data = register_objfile_data ();
4834 undef_types_allocated = 20;
4835 undef_types_length = 0;
4836 undef_types = XNEWVEC (struct type *, undef_types_allocated);
4838 noname_undefs_allocated = 20;
4839 noname_undefs_length = 0;
4840 noname_undefs = XNEWVEC (struct nat, noname_undefs_allocated);
4842 stab_register_index = register_symbol_register_impl (LOC_REGISTER,
4843 &stab_register_funcs);
4844 stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
4845 &stab_register_funcs);