1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used with many systems that use
22 the a.out object file format, as well as some systems that use
23 COFF or ELF where the stabs data is placed in a special section.
24 Avoid placing any object file format specific code in this file. */
27 #include "gdb_string.h"
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"
40 #include "complaints.h"
42 #include "gdb-demangle.h"
46 #include "cp-support.h"
47 #include "gdb_assert.h"
51 /* Ask stabsread.h to define the vars it normally declares `extern'. */
54 #include "stabsread.h" /* Our own declarations */
57 extern void _initialize_stabsread (void);
59 /* The routines that read and process a complete stabs for a C struct or
60 C++ class pass lists of data member fields and lists of member function
61 fields in an instance of a field_info structure, as defined below.
62 This is part of some reorganization of low level C++ support and is
63 expected to eventually go away... (FIXME) */
69 struct nextfield *next;
71 /* This is the raw visibility from the stab. It is not checked
72 for being one of the visibilities we recognize, so code which
73 examines this field better be able to deal. */
79 struct next_fnfieldlist
81 struct next_fnfieldlist *next;
82 struct fn_fieldlist fn_fieldlist;
88 read_one_struct_field (struct field_info *, char **, char *,
89 struct type *, struct objfile *);
91 static struct type *dbx_alloc_type (int[2], struct objfile *);
93 static long read_huge_number (char **, int, int *, int);
95 static struct type *error_type (char **, struct objfile *);
98 patch_block_stabs (struct pending *, struct pending_stabs *,
101 static void fix_common_block (struct symbol *, CORE_ADDR);
103 static int read_type_number (char **, int *);
105 static struct type *read_type (char **, struct objfile *);
107 static struct type *read_range_type (char **, int[2], int, struct objfile *);
109 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
111 static struct type *read_sun_floating_type (char **, int[2],
114 static struct type *read_enum_type (char **, struct type *, struct objfile *);
116 static struct type *rs6000_builtin_type (int, struct objfile *);
119 read_member_functions (struct field_info *, char **, struct type *,
123 read_struct_fields (struct field_info *, char **, struct type *,
127 read_baseclasses (struct field_info *, char **, struct type *,
131 read_tilde_fields (struct field_info *, char **, struct type *,
134 static int attach_fn_fields_to_type (struct field_info *, struct type *);
136 static int attach_fields_to_type (struct field_info *, struct type *,
139 static struct type *read_struct_type (char **, struct type *,
143 static struct type *read_array_type (char **, struct type *,
146 static struct field *read_args (char **, int, struct objfile *, int *, int *);
148 static void add_undefined_type (struct type *, int[2]);
151 read_cpp_abbrev (struct field_info *, char **, struct type *,
154 static char *find_name_end (char *name);
156 static int process_reference (char **string);
158 void stabsread_clear_cache (void);
160 static const char vptr_name[] = "_vptr$";
161 static const char vb_name[] = "_vb$";
164 invalid_cpp_abbrev_complaint (const char *arg1)
166 complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
170 reg_value_complaint (int regnum, int num_regs, const char *sym)
172 complaint (&symfile_complaints,
173 _("register number %d too large (max %d) in symbol %s"),
174 regnum, num_regs - 1, sym);
178 stabs_general_complaint (const char *arg1)
180 complaint (&symfile_complaints, "%s", arg1);
183 /* Make a list of forward references which haven't been defined. */
185 static struct type **undef_types;
186 static int undef_types_allocated;
187 static int undef_types_length;
188 static struct symbol *current_symbol = NULL;
190 /* Make a list of nameless types that are undefined.
191 This happens when another type is referenced by its number
192 before this type is actually defined. For instance "t(0,1)=k(0,2)"
193 and type (0,2) is defined only later. */
200 static struct nat *noname_undefs;
201 static int noname_undefs_allocated;
202 static int noname_undefs_length;
204 /* Check for and handle cretinous stabs symbol name continuation! */
205 #define STABS_CONTINUE(pp,objfile) \
207 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
208 *(pp) = next_symbol_text (objfile); \
212 /* Look up a dbx type-number pair. Return the address of the slot
213 where the type for that number-pair is stored.
214 The number-pair is in TYPENUMS.
216 This can be used for finding the type associated with that pair
217 or for associating a new type with the pair. */
219 static struct type **
220 dbx_lookup_type (int typenums[2], struct objfile *objfile)
222 int filenum = typenums[0];
223 int index = typenums[1];
226 struct header_file *f;
229 if (filenum == -1) /* -1,-1 is for temporary types. */
232 if (filenum < 0 || filenum >= n_this_object_header_files)
234 complaint (&symfile_complaints,
235 _("Invalid symbol data: type number "
236 "(%d,%d) out of range at symtab pos %d."),
237 filenum, index, symnum);
245 /* Caller wants address of address of type. We think
246 that negative (rs6k builtin) types will never appear as
247 "lvalues", (nor should they), so we stuff the real type
248 pointer into a temp, and return its address. If referenced,
249 this will do the right thing. */
250 static struct type *temp_type;
252 temp_type = rs6000_builtin_type (index, objfile);
256 /* Type is defined outside of header files.
257 Find it in this object file's type vector. */
258 if (index >= type_vector_length)
260 old_len = type_vector_length;
263 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
264 type_vector = (struct type **)
265 xmalloc (type_vector_length * sizeof (struct type *));
267 while (index >= type_vector_length)
269 type_vector_length *= 2;
271 type_vector = (struct type **)
272 xrealloc ((char *) type_vector,
273 (type_vector_length * sizeof (struct type *)));
274 memset (&type_vector[old_len], 0,
275 (type_vector_length - old_len) * sizeof (struct type *));
277 return (&type_vector[index]);
281 real_filenum = this_object_header_files[filenum];
283 if (real_filenum >= N_HEADER_FILES (objfile))
285 static struct type *temp_type;
287 warning (_("GDB internal error: bad real_filenum"));
290 temp_type = objfile_type (objfile)->builtin_error;
294 f = HEADER_FILES (objfile) + real_filenum;
296 f_orig_length = f->length;
297 if (index >= f_orig_length)
299 while (index >= f->length)
303 f->vector = (struct type **)
304 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
305 memset (&f->vector[f_orig_length], 0,
306 (f->length - f_orig_length) * sizeof (struct type *));
308 return (&f->vector[index]);
312 /* Make sure there is a type allocated for type numbers TYPENUMS
313 and return the type object.
314 This can create an empty (zeroed) type object.
315 TYPENUMS may be (-1, -1) to return a new type object that is not
316 put into the type vector, and so may not be referred to by number. */
319 dbx_alloc_type (int typenums[2], struct objfile *objfile)
321 struct type **type_addr;
323 if (typenums[0] == -1)
325 return (alloc_type (objfile));
328 type_addr = dbx_lookup_type (typenums, objfile);
330 /* If we are referring to a type not known at all yet,
331 allocate an empty type for it.
332 We will fill it in later if we find out how. */
335 *type_addr = alloc_type (objfile);
341 /* for all the stabs in a given stab vector, build appropriate types
342 and fix their symbols in given symbol vector. */
345 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
346 struct objfile *objfile)
355 /* for all the stab entries, find their corresponding symbols and
356 patch their types! */
358 for (ii = 0; ii < stabs->count; ++ii)
360 name = stabs->stab[ii];
361 pp = (char *) strchr (name, ':');
362 gdb_assert (pp); /* Must find a ':' or game's over. */
366 pp = (char *) strchr (pp, ':');
368 sym = find_symbol_in_list (symbols, name, pp - name);
371 /* FIXME-maybe: it would be nice if we noticed whether
372 the variable was defined *anywhere*, not just whether
373 it is defined in this compilation unit. But neither
374 xlc or GCC seem to need such a definition, and until
375 we do psymtabs (so that the minimal symbols from all
376 compilation units are available now), I'm not sure
377 how to get the information. */
379 /* On xcoff, if a global is defined and never referenced,
380 ld will remove it from the executable. There is then
381 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
382 sym = allocate_symbol (objfile);
383 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
384 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
385 SYMBOL_SET_LINKAGE_NAME
386 (sym, obstack_copy0 (&objfile->objfile_obstack,
389 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
391 /* I don't think the linker does this with functions,
392 so as far as I know this is never executed.
393 But it doesn't hurt to check. */
395 lookup_function_type (read_type (&pp, objfile));
399 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
401 add_symbol_to_list (sym, &global_symbols);
406 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
409 lookup_function_type (read_type (&pp, objfile));
413 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
421 /* Read a number by which a type is referred to in dbx data,
422 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
423 Just a single number N is equivalent to (0,N).
424 Return the two numbers by storing them in the vector TYPENUMS.
425 TYPENUMS will then be used as an argument to dbx_lookup_type.
427 Returns 0 for success, -1 for error. */
430 read_type_number (char **pp, int *typenums)
437 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
440 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
447 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
455 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
456 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
457 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
458 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
460 /* Structure for storing pointers to reference definitions for fast lookup
461 during "process_later". */
470 #define MAX_CHUNK_REFS 100
471 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
472 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
474 static struct ref_map *ref_map;
476 /* Ptr to free cell in chunk's linked list. */
477 static int ref_count = 0;
479 /* Number of chunks malloced. */
480 static int ref_chunk = 0;
482 /* This file maintains a cache of stabs aliases found in the symbol
483 table. If the symbol table changes, this cache must be cleared
484 or we are left holding onto data in invalid obstacks. */
486 stabsread_clear_cache (void)
492 /* Create array of pointers mapping refids to symbols and stab strings.
493 Add pointers to reference definition symbols and/or their values as we
494 find them, using their reference numbers as our index.
495 These will be used later when we resolve references. */
497 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
501 if (refnum >= ref_count)
502 ref_count = refnum + 1;
503 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
505 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
506 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
508 ref_map = (struct ref_map *)
509 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
510 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
511 new_chunks * REF_CHUNK_SIZE);
512 ref_chunk += new_chunks;
514 ref_map[refnum].stabs = stabs;
515 ref_map[refnum].sym = sym;
516 ref_map[refnum].value = value;
519 /* Return defined sym for the reference REFNUM. */
521 ref_search (int refnum)
523 if (refnum < 0 || refnum > ref_count)
525 return ref_map[refnum].sym;
528 /* Parse a reference id in STRING and return the resulting
529 reference number. Move STRING beyond the reference id. */
532 process_reference (char **string)
540 /* Advance beyond the initial '#'. */
543 /* Read number as reference id. */
544 while (*p && isdigit (*p))
546 refnum = refnum * 10 + *p - '0';
553 /* If STRING defines a reference, store away a pointer to the reference
554 definition for later use. Return the reference number. */
557 symbol_reference_defined (char **string)
562 refnum = process_reference (&p);
564 /* Defining symbols end in '='. */
567 /* Symbol is being defined here. */
573 /* Must be a reference. Either the symbol has already been defined,
574 or this is a forward reference to it. */
581 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
583 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
585 if (regno >= gdbarch_num_regs (gdbarch)
586 + gdbarch_num_pseudo_regs (gdbarch))
588 reg_value_complaint (regno,
589 gdbarch_num_regs (gdbarch)
590 + gdbarch_num_pseudo_regs (gdbarch),
591 SYMBOL_PRINT_NAME (sym));
593 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless. */
599 static const struct symbol_register_ops stab_register_funcs = {
603 /* The "aclass" indices for computed symbols. */
605 static int stab_register_index;
606 static int stab_regparm_index;
609 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
610 struct objfile *objfile)
612 struct gdbarch *gdbarch = get_objfile_arch (objfile);
614 char *p = (char *) find_name_end (string);
618 char *new_name = NULL;
620 /* We would like to eliminate nameless symbols, but keep their types.
621 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
622 to type 2, but, should not create a symbol to address that type. Since
623 the symbol will be nameless, there is no way any user can refer to it. */
627 /* Ignore syms with empty names. */
631 /* Ignore old-style symbols from cc -go. */
641 complaint (&symfile_complaints,
642 _("Bad stabs string '%s'"), string);
647 /* If a nameless stab entry, all we need is the type, not the symbol.
648 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
649 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
651 current_symbol = sym = allocate_symbol (objfile);
653 if (processing_gcc_compilation)
655 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
656 number of bytes occupied by a type or object, which we ignore. */
657 SYMBOL_LINE (sym) = desc;
661 SYMBOL_LINE (sym) = 0; /* unknown */
664 if (is_cplus_marker (string[0]))
666 /* Special GNU C++ names. */
670 SYMBOL_SET_LINKAGE_NAME (sym, "this");
673 case 'v': /* $vtbl_ptr_type */
677 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
681 /* This was an anonymous type that was never fixed up. */
685 /* SunPRO (3.0 at least) static variable encoding. */
686 if (gdbarch_static_transform_name_p (gdbarch))
688 /* ... fall through ... */
691 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
693 goto normal; /* Do *something* with it. */
699 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
700 &objfile->objfile_obstack);
701 if (SYMBOL_LANGUAGE (sym) == language_cplus)
703 char *name = alloca (p - string + 1);
705 memcpy (name, string, p - string);
706 name[p - string] = '\0';
707 new_name = cp_canonicalize_string (name);
709 if (new_name != NULL)
711 SYMBOL_SET_NAMES (sym, new_name, strlen (new_name), 1, objfile);
715 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
717 if (SYMBOL_LANGUAGE (sym) == language_cplus)
718 cp_scan_for_anonymous_namespaces (sym, objfile);
723 /* Determine the type of name being defined. */
725 /* Getting GDB to correctly skip the symbol on an undefined symbol
726 descriptor and not ever dump core is a very dodgy proposition if
727 we do things this way. I say the acorn RISC machine can just
728 fix their compiler. */
729 /* The Acorn RISC machine's compiler can put out locals that don't
730 start with "234=" or "(3,4)=", so assume anything other than the
731 deftypes we know how to handle is a local. */
732 if (!strchr ("cfFGpPrStTvVXCR", *p))
734 if (isdigit (*p) || *p == '(' || *p == '-')
743 /* c is a special case, not followed by a type-number.
744 SYMBOL:c=iVALUE for an integer constant symbol.
745 SYMBOL:c=rVALUE for a floating constant symbol.
746 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
747 e.g. "b:c=e6,0" for "const b = blob1"
748 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
751 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
752 SYMBOL_TYPE (sym) = error_type (&p, objfile);
753 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
754 add_symbol_to_list (sym, &file_symbols);
764 struct type *dbl_type;
766 /* FIXME-if-picky-about-floating-accuracy: Should be using
767 target arithmetic to get the value. real.c in GCC
768 probably has the necessary code. */
770 dbl_type = objfile_type (objfile)->builtin_double;
772 obstack_alloc (&objfile->objfile_obstack,
773 TYPE_LENGTH (dbl_type));
774 store_typed_floating (dbl_valu, dbl_type, d);
776 SYMBOL_TYPE (sym) = dbl_type;
777 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
778 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
783 /* Defining integer constants this way is kind of silly,
784 since 'e' constants allows the compiler to give not
785 only the value, but the type as well. C has at least
786 int, long, unsigned int, and long long as constant
787 types; other languages probably should have at least
788 unsigned as well as signed constants. */
790 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
791 SYMBOL_VALUE (sym) = atoi (p);
792 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
798 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
799 SYMBOL_VALUE (sym) = atoi (p);
800 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
806 struct type *range_type;
809 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
810 gdb_byte *string_value;
812 if (quote != '\'' && quote != '"')
814 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
815 SYMBOL_TYPE (sym) = error_type (&p, objfile);
816 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
817 add_symbol_to_list (sym, &file_symbols);
821 /* Find matching quote, rejecting escaped quotes. */
822 while (*p && *p != quote)
824 if (*p == '\\' && p[1] == quote)
826 string_local[ind] = (gdb_byte) quote;
832 string_local[ind] = (gdb_byte) (*p);
839 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
840 SYMBOL_TYPE (sym) = error_type (&p, objfile);
841 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
842 add_symbol_to_list (sym, &file_symbols);
846 /* NULL terminate the string. */
847 string_local[ind] = 0;
849 = create_range_type (NULL,
850 objfile_type (objfile)->builtin_int,
852 SYMBOL_TYPE (sym) = create_array_type (NULL,
853 objfile_type (objfile)->builtin_char,
855 string_value = obstack_alloc (&objfile->objfile_obstack, ind + 1);
856 memcpy (string_value, string_local, ind + 1);
859 SYMBOL_VALUE_BYTES (sym) = string_value;
860 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
865 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
866 can be represented as integral.
867 e.g. "b:c=e6,0" for "const b = blob1"
868 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
870 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
871 SYMBOL_TYPE (sym) = read_type (&p, objfile);
875 SYMBOL_TYPE (sym) = error_type (&p, objfile);
880 /* If the value is too big to fit in an int (perhaps because
881 it is unsigned), or something like that, we silently get
882 a bogus value. The type and everything else about it is
883 correct. Ideally, we should be using whatever we have
884 available for parsing unsigned and long long values,
886 SYMBOL_VALUE (sym) = atoi (p);
891 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
892 SYMBOL_TYPE (sym) = error_type (&p, objfile);
895 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
896 add_symbol_to_list (sym, &file_symbols);
900 /* The name of a caught exception. */
901 SYMBOL_TYPE (sym) = read_type (&p, objfile);
902 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
903 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
904 SYMBOL_VALUE_ADDRESS (sym) = valu;
905 add_symbol_to_list (sym, &local_symbols);
909 /* A static function definition. */
910 SYMBOL_TYPE (sym) = read_type (&p, objfile);
911 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
912 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
913 add_symbol_to_list (sym, &file_symbols);
914 /* fall into process_function_types. */
916 process_function_types:
917 /* Function result types are described as the result type in stabs.
918 We need to convert this to the function-returning-type-X type
919 in GDB. E.g. "int" is converted to "function returning int". */
920 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
921 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
923 /* All functions in C++ have prototypes. Stabs does not offer an
924 explicit way to identify prototyped or unprototyped functions,
925 but both GCC and Sun CC emit stabs for the "call-as" type rather
926 than the "declared-as" type for unprototyped functions, so
927 we treat all functions as if they were prototyped. This is used
928 primarily for promotion when calling the function from GDB. */
929 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
931 /* fall into process_prototype_types. */
933 process_prototype_types:
934 /* Sun acc puts declared types of arguments here. */
937 struct type *ftype = SYMBOL_TYPE (sym);
942 /* Obtain a worst case guess for the number of arguments
943 by counting the semicolons. */
950 /* Allocate parameter information fields and fill them in. */
951 TYPE_FIELDS (ftype) = (struct field *)
952 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
957 /* A type number of zero indicates the start of varargs.
958 FIXME: GDB currently ignores vararg functions. */
959 if (p[0] == '0' && p[1] == '\0')
961 ptype = read_type (&p, objfile);
963 /* The Sun compilers mark integer arguments, which should
964 be promoted to the width of the calling conventions, with
965 a type which references itself. This type is turned into
966 a TYPE_CODE_VOID type by read_type, and we have to turn
967 it back into builtin_int here.
968 FIXME: Do we need a new builtin_promoted_int_arg ? */
969 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
970 ptype = objfile_type (objfile)->builtin_int;
971 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
972 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
974 TYPE_NFIELDS (ftype) = nparams;
975 TYPE_PROTOTYPED (ftype) = 1;
980 /* A global function definition. */
981 SYMBOL_TYPE (sym) = read_type (&p, objfile);
982 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
983 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
984 add_symbol_to_list (sym, &global_symbols);
985 goto process_function_types;
988 /* For a class G (global) symbol, it appears that the
989 value is not correct. It is necessary to search for the
990 corresponding linker definition to find the value.
991 These definitions appear at the end of the namelist. */
992 SYMBOL_TYPE (sym) = read_type (&p, objfile);
993 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
994 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
995 /* Don't add symbol references to global_sym_chain.
996 Symbol references don't have valid names and wont't match up with
997 minimal symbols when the global_sym_chain is relocated.
998 We'll fixup symbol references when we fixup the defining symbol. */
999 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1001 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1002 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1003 global_sym_chain[i] = sym;
1005 add_symbol_to_list (sym, &global_symbols);
1008 /* This case is faked by a conditional above,
1009 when there is no code letter in the dbx data.
1010 Dbx data never actually contains 'l'. */
1013 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1014 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1015 SYMBOL_VALUE (sym) = valu;
1016 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1017 add_symbol_to_list (sym, &local_symbols);
1022 /* pF is a two-letter code that means a function parameter in Fortran.
1023 The type-number specifies the type of the return value.
1024 Translate it into a pointer-to-function type. */
1028 = lookup_pointer_type
1029 (lookup_function_type (read_type (&p, objfile)));
1032 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1034 SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
1035 SYMBOL_VALUE (sym) = valu;
1036 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1037 SYMBOL_IS_ARGUMENT (sym) = 1;
1038 add_symbol_to_list (sym, &local_symbols);
1040 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1042 /* On little-endian machines, this crud is never necessary,
1043 and, if the extra bytes contain garbage, is harmful. */
1047 /* If it's gcc-compiled, if it says `short', believe it. */
1048 if (processing_gcc_compilation
1049 || gdbarch_believe_pcc_promotion (gdbarch))
1052 if (!gdbarch_believe_pcc_promotion (gdbarch))
1054 /* If PCC says a parameter is a short or a char, it is
1056 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1057 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1058 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1061 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1062 ? objfile_type (objfile)->builtin_unsigned_int
1063 : objfile_type (objfile)->builtin_int;
1069 /* acc seems to use P to declare the prototypes of functions that
1070 are referenced by this file. gdb is not prepared to deal
1071 with this extra information. FIXME, it ought to. */
1074 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1075 goto process_prototype_types;
1080 /* Parameter which is in a register. */
1081 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1082 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1083 SYMBOL_IS_ARGUMENT (sym) = 1;
1084 SYMBOL_VALUE (sym) = valu;
1085 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1086 add_symbol_to_list (sym, &local_symbols);
1090 /* Register variable (either global or local). */
1091 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1092 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1093 SYMBOL_VALUE (sym) = valu;
1094 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1095 if (within_function)
1097 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1098 the same name to represent an argument passed in a
1099 register. GCC uses 'P' for the same case. So if we find
1100 such a symbol pair we combine it into one 'P' symbol.
1101 For Sun cc we need to do this regardless of
1102 stabs_argument_has_addr, because the compiler puts out
1103 the 'p' symbol even if it never saves the argument onto
1106 On most machines, we want to preserve both symbols, so
1107 that we can still get information about what is going on
1108 with the stack (VAX for computing args_printed, using
1109 stack slots instead of saved registers in backtraces,
1112 Note that this code illegally combines
1113 main(argc) struct foo argc; { register struct foo argc; }
1114 but this case is considered pathological and causes a warning
1115 from a decent compiler. */
1118 && local_symbols->nsyms > 0
1119 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1121 struct symbol *prev_sym;
1123 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1124 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1125 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1126 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1127 SYMBOL_LINKAGE_NAME (sym)) == 0)
1129 SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
1130 /* Use the type from the LOC_REGISTER; that is the type
1131 that is actually in that register. */
1132 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1133 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1138 add_symbol_to_list (sym, &local_symbols);
1141 add_symbol_to_list (sym, &file_symbols);
1145 /* Static symbol at top level of file. */
1146 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1147 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1148 SYMBOL_VALUE_ADDRESS (sym) = valu;
1149 if (gdbarch_static_transform_name_p (gdbarch)
1150 && gdbarch_static_transform_name (gdbarch,
1151 SYMBOL_LINKAGE_NAME (sym))
1152 != SYMBOL_LINKAGE_NAME (sym))
1154 struct minimal_symbol *msym;
1156 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1160 const char *new_name = gdbarch_static_transform_name
1161 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1163 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1164 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1167 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1168 add_symbol_to_list (sym, &file_symbols);
1172 /* In Ada, there is no distinction between typedef and non-typedef;
1173 any type declaration implicitly has the equivalent of a typedef,
1174 and thus 't' is in fact equivalent to 'Tt'.
1176 Therefore, for Ada units, we check the character immediately
1177 before the 't', and if we do not find a 'T', then make sure to
1178 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1179 will be stored in the VAR_DOMAIN). If the symbol was indeed
1180 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1181 elsewhere, so we don't need to take care of that.
1183 This is important to do, because of forward references:
1184 The cleanup of undefined types stored in undef_types only uses
1185 STRUCT_DOMAIN symbols to perform the replacement. */
1186 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1189 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1191 /* For a nameless type, we don't want a create a symbol, thus we
1192 did not use `sym'. Return without further processing. */
1196 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1197 SYMBOL_VALUE (sym) = valu;
1198 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1199 /* C++ vagaries: we may have a type which is derived from
1200 a base type which did not have its name defined when the
1201 derived class was output. We fill in the derived class's
1202 base part member's name here in that case. */
1203 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1204 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1205 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1206 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1210 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1211 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1212 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1213 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1216 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1218 /* gcc-2.6 or later (when using -fvtable-thunks)
1219 emits a unique named type for a vtable entry.
1220 Some gdb code depends on that specific name. */
1221 extern const char vtbl_ptr_name[];
1223 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1224 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1225 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1227 /* If we are giving a name to a type such as "pointer to
1228 foo" or "function returning foo", we better not set
1229 the TYPE_NAME. If the program contains "typedef char
1230 *caddr_t;", we don't want all variables of type char
1231 * to print as caddr_t. This is not just a
1232 consequence of GDB's type management; PCC and GCC (at
1233 least through version 2.4) both output variables of
1234 either type char * or caddr_t with the type number
1235 defined in the 't' symbol for caddr_t. If a future
1236 compiler cleans this up it GDB is not ready for it
1237 yet, but if it becomes ready we somehow need to
1238 disable this check (without breaking the PCC/GCC2.4
1243 Fortunately, this check seems not to be necessary
1244 for anything except pointers or functions. */
1245 /* ezannoni: 2000-10-26. This seems to apply for
1246 versions of gcc older than 2.8. This was the original
1247 problem: with the following code gdb would tell that
1248 the type for name1 is caddr_t, and func is char().
1250 typedef char *caddr_t;
1262 /* Pascal accepts names for pointer types. */
1263 if (current_subfile->language == language_pascal)
1265 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1269 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1272 add_symbol_to_list (sym, &file_symbols);
1276 /* Create the STRUCT_DOMAIN clone. */
1277 struct symbol *struct_sym = allocate_symbol (objfile);
1280 SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
1281 SYMBOL_VALUE (struct_sym) = valu;
1282 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1283 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1284 TYPE_NAME (SYMBOL_TYPE (sym))
1285 = obconcat (&objfile->objfile_obstack,
1286 SYMBOL_LINKAGE_NAME (sym),
1288 add_symbol_to_list (struct_sym, &file_symbols);
1294 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1295 by 't' which means we are typedef'ing it as well. */
1296 synonym = *p == 't';
1301 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1303 /* For a nameless type, we don't want a create a symbol, thus we
1304 did not use `sym'. Return without further processing. */
1308 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1309 SYMBOL_VALUE (sym) = valu;
1310 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1311 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1312 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1313 = obconcat (&objfile->objfile_obstack,
1314 SYMBOL_LINKAGE_NAME (sym),
1316 add_symbol_to_list (sym, &file_symbols);
1320 /* Clone the sym and then modify it. */
1321 struct symbol *typedef_sym = allocate_symbol (objfile);
1323 *typedef_sym = *sym;
1324 SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
1325 SYMBOL_VALUE (typedef_sym) = valu;
1326 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1327 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1328 TYPE_NAME (SYMBOL_TYPE (sym))
1329 = obconcat (&objfile->objfile_obstack,
1330 SYMBOL_LINKAGE_NAME (sym),
1332 add_symbol_to_list (typedef_sym, &file_symbols);
1337 /* Static symbol of local scope. */
1338 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1339 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1340 SYMBOL_VALUE_ADDRESS (sym) = valu;
1341 if (gdbarch_static_transform_name_p (gdbarch)
1342 && gdbarch_static_transform_name (gdbarch,
1343 SYMBOL_LINKAGE_NAME (sym))
1344 != SYMBOL_LINKAGE_NAME (sym))
1346 struct minimal_symbol *msym;
1348 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1352 const char *new_name = gdbarch_static_transform_name
1353 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1355 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1356 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1359 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1360 add_symbol_to_list (sym, &local_symbols);
1364 /* Reference parameter */
1365 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1366 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1367 SYMBOL_IS_ARGUMENT (sym) = 1;
1368 SYMBOL_VALUE (sym) = valu;
1369 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1370 add_symbol_to_list (sym, &local_symbols);
1374 /* Reference parameter which is in a register. */
1375 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1376 SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
1377 SYMBOL_IS_ARGUMENT (sym) = 1;
1378 SYMBOL_VALUE (sym) = valu;
1379 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1380 add_symbol_to_list (sym, &local_symbols);
1384 /* This is used by Sun FORTRAN for "function result value".
1385 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1386 that Pascal uses it too, but when I tried it Pascal used
1387 "x:3" (local symbol) instead. */
1388 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1389 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1390 SYMBOL_VALUE (sym) = valu;
1391 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1392 add_symbol_to_list (sym, &local_symbols);
1396 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1397 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
1398 SYMBOL_VALUE (sym) = 0;
1399 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1400 add_symbol_to_list (sym, &file_symbols);
1404 /* Some systems pass variables of certain types by reference instead
1405 of by value, i.e. they will pass the address of a structure (in a
1406 register or on the stack) instead of the structure itself. */
1408 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1409 && SYMBOL_IS_ARGUMENT (sym))
1411 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1412 variables passed in a register). */
1413 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1414 SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
1415 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1416 and subsequent arguments on SPARC, for example). */
1417 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1418 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1424 /* Skip rest of this symbol and return an error type.
1426 General notes on error recovery: error_type always skips to the
1427 end of the symbol (modulo cretinous dbx symbol name continuation).
1428 Thus code like this:
1430 if (*(*pp)++ != ';')
1431 return error_type (pp, objfile);
1433 is wrong because if *pp starts out pointing at '\0' (typically as the
1434 result of an earlier error), it will be incremented to point to the
1435 start of the next symbol, which might produce strange results, at least
1436 if you run off the end of the string table. Instead use
1439 return error_type (pp, objfile);
1445 foo = error_type (pp, objfile);
1449 And in case it isn't obvious, the point of all this hair is so the compiler
1450 can define new types and new syntaxes, and old versions of the
1451 debugger will be able to read the new symbol tables. */
1453 static struct type *
1454 error_type (char **pp, struct objfile *objfile)
1456 complaint (&symfile_complaints,
1457 _("couldn't parse type; debugger out of date?"));
1460 /* Skip to end of symbol. */
1461 while (**pp != '\0')
1466 /* Check for and handle cretinous dbx symbol name continuation! */
1467 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1469 *pp = next_symbol_text (objfile);
1476 return objfile_type (objfile)->builtin_error;
1480 /* Read type information or a type definition; return the type. Even
1481 though this routine accepts either type information or a type
1482 definition, the distinction is relevant--some parts of stabsread.c
1483 assume that type information starts with a digit, '-', or '(' in
1484 deciding whether to call read_type. */
1486 static struct type *
1487 read_type (char **pp, struct objfile *objfile)
1489 struct type *type = 0;
1492 char type_descriptor;
1494 /* Size in bits of type if specified by a type attribute, or -1 if
1495 there is no size attribute. */
1498 /* Used to distinguish string and bitstring from char-array and set. */
1501 /* Used to distinguish vector from array. */
1504 /* Read type number if present. The type number may be omitted.
1505 for instance in a two-dimensional array declared with type
1506 "ar1;1;10;ar1;1;10;4". */
1507 if ((**pp >= '0' && **pp <= '9')
1511 if (read_type_number (pp, typenums) != 0)
1512 return error_type (pp, objfile);
1516 /* Type is not being defined here. Either it already
1517 exists, or this is a forward reference to it.
1518 dbx_alloc_type handles both cases. */
1519 type = dbx_alloc_type (typenums, objfile);
1521 /* If this is a forward reference, arrange to complain if it
1522 doesn't get patched up by the time we're done
1524 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1525 add_undefined_type (type, typenums);
1530 /* Type is being defined here. */
1532 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1537 /* 'typenums=' not present, type is anonymous. Read and return
1538 the definition, but don't put it in the type vector. */
1539 typenums[0] = typenums[1] = -1;
1544 type_descriptor = (*pp)[-1];
1545 switch (type_descriptor)
1549 enum type_code code;
1551 /* Used to index through file_symbols. */
1552 struct pending *ppt;
1555 /* Name including "struct", etc. */
1559 char *from, *to, *p, *q1, *q2;
1561 /* Set the type code according to the following letter. */
1565 code = TYPE_CODE_STRUCT;
1568 code = TYPE_CODE_UNION;
1571 code = TYPE_CODE_ENUM;
1575 /* Complain and keep going, so compilers can invent new
1576 cross-reference types. */
1577 complaint (&symfile_complaints,
1578 _("Unrecognized cross-reference type `%c'"),
1580 code = TYPE_CODE_STRUCT;
1585 q1 = strchr (*pp, '<');
1586 p = strchr (*pp, ':');
1588 return error_type (pp, objfile);
1589 if (q1 && p > q1 && p[1] == ':')
1591 int nesting_level = 0;
1593 for (q2 = q1; *q2; q2++)
1597 else if (*q2 == '>')
1599 else if (*q2 == ':' && nesting_level == 0)
1604 return error_type (pp, objfile);
1607 if (current_subfile->language == language_cplus)
1609 char *new_name, *name = alloca (p - *pp + 1);
1611 memcpy (name, *pp, p - *pp);
1612 name[p - *pp] = '\0';
1613 new_name = cp_canonicalize_string (name);
1614 if (new_name != NULL)
1616 type_name = obstack_copy0 (&objfile->objfile_obstack,
1617 new_name, strlen (new_name));
1621 if (type_name == NULL)
1623 to = type_name = (char *)
1624 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1626 /* Copy the name. */
1633 /* Set the pointer ahead of the name which we just read, and
1638 /* If this type has already been declared, then reuse the same
1639 type, rather than allocating a new one. This saves some
1642 for (ppt = file_symbols; ppt; ppt = ppt->next)
1643 for (i = 0; i < ppt->nsyms; i++)
1645 struct symbol *sym = ppt->symbol[i];
1647 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1648 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1649 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1650 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1652 obstack_free (&objfile->objfile_obstack, type_name);
1653 type = SYMBOL_TYPE (sym);
1654 if (typenums[0] != -1)
1655 *dbx_lookup_type (typenums, objfile) = type;
1660 /* Didn't find the type to which this refers, so we must
1661 be dealing with a forward reference. Allocate a type
1662 structure for it, and keep track of it so we can
1663 fill in the rest of the fields when we get the full
1665 type = dbx_alloc_type (typenums, objfile);
1666 TYPE_CODE (type) = code;
1667 TYPE_TAG_NAME (type) = type_name;
1668 INIT_CPLUS_SPECIFIC (type);
1669 TYPE_STUB (type) = 1;
1671 add_undefined_type (type, typenums);
1675 case '-': /* RS/6000 built-in type */
1689 /* We deal with something like t(1,2)=(3,4)=... which
1690 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1692 /* Allocate and enter the typedef type first.
1693 This handles recursive types. */
1694 type = dbx_alloc_type (typenums, objfile);
1695 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1697 struct type *xtype = read_type (pp, objfile);
1701 /* It's being defined as itself. That means it is "void". */
1702 TYPE_CODE (type) = TYPE_CODE_VOID;
1703 TYPE_LENGTH (type) = 1;
1705 else if (type_size >= 0 || is_string)
1707 /* This is the absolute wrong way to construct types. Every
1708 other debug format has found a way around this problem and
1709 the related problems with unnecessarily stubbed types;
1710 someone motivated should attempt to clean up the issue
1711 here as well. Once a type pointed to has been created it
1712 should not be modified.
1714 Well, it's not *absolutely* wrong. Constructing recursive
1715 types (trees, linked lists) necessarily entails modifying
1716 types after creating them. Constructing any loop structure
1717 entails side effects. The Dwarf 2 reader does handle this
1718 more gracefully (it never constructs more than once
1719 instance of a type object, so it doesn't have to copy type
1720 objects wholesale), but it still mutates type objects after
1721 other folks have references to them.
1723 Keep in mind that this circularity/mutation issue shows up
1724 at the source language level, too: C's "incomplete types",
1725 for example. So the proper cleanup, I think, would be to
1726 limit GDB's type smashing to match exactly those required
1727 by the source language. So GDB could have a
1728 "complete_this_type" function, but never create unnecessary
1729 copies of a type otherwise. */
1730 replace_type (type, xtype);
1731 TYPE_NAME (type) = NULL;
1732 TYPE_TAG_NAME (type) = NULL;
1736 TYPE_TARGET_STUB (type) = 1;
1737 TYPE_TARGET_TYPE (type) = xtype;
1742 /* In the following types, we must be sure to overwrite any existing
1743 type that the typenums refer to, rather than allocating a new one
1744 and making the typenums point to the new one. This is because there
1745 may already be pointers to the existing type (if it had been
1746 forward-referenced), and we must change it to a pointer, function,
1747 reference, or whatever, *in-place*. */
1749 case '*': /* Pointer to another type */
1750 type1 = read_type (pp, objfile);
1751 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1754 case '&': /* Reference to another type */
1755 type1 = read_type (pp, objfile);
1756 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
1759 case 'f': /* Function returning another type */
1760 type1 = read_type (pp, objfile);
1761 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1764 case 'g': /* Prototyped function. (Sun) */
1766 /* Unresolved questions:
1768 - According to Sun's ``STABS Interface Manual'', for 'f'
1769 and 'F' symbol descriptors, a `0' in the argument type list
1770 indicates a varargs function. But it doesn't say how 'g'
1771 type descriptors represent that info. Someone with access
1772 to Sun's toolchain should try it out.
1774 - According to the comment in define_symbol (search for
1775 `process_prototype_types:'), Sun emits integer arguments as
1776 types which ref themselves --- like `void' types. Do we
1777 have to deal with that here, too? Again, someone with
1778 access to Sun's toolchain should try it out and let us
1781 const char *type_start = (*pp) - 1;
1782 struct type *return_type = read_type (pp, objfile);
1783 struct type *func_type
1784 = make_function_type (return_type,
1785 dbx_lookup_type (typenums, objfile));
1788 struct type_list *next;
1792 while (**pp && **pp != '#')
1794 struct type *arg_type = read_type (pp, objfile);
1795 struct type_list *new = alloca (sizeof (*new));
1796 new->type = arg_type;
1797 new->next = arg_types;
1805 complaint (&symfile_complaints,
1806 _("Prototyped function type didn't "
1807 "end arguments with `#':\n%s"),
1811 /* If there is just one argument whose type is `void', then
1812 that's just an empty argument list. */
1814 && ! arg_types->next
1815 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1818 TYPE_FIELDS (func_type)
1819 = (struct field *) TYPE_ALLOC (func_type,
1820 num_args * sizeof (struct field));
1821 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1824 struct type_list *t;
1826 /* We stuck each argument type onto the front of the list
1827 when we read it, so the list is reversed. Build the
1828 fields array right-to-left. */
1829 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1830 TYPE_FIELD_TYPE (func_type, i) = t->type;
1832 TYPE_NFIELDS (func_type) = num_args;
1833 TYPE_PROTOTYPED (func_type) = 1;
1839 case 'k': /* Const qualifier on some type (Sun) */
1840 type = read_type (pp, objfile);
1841 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1842 dbx_lookup_type (typenums, objfile));
1845 case 'B': /* Volatile qual on some type (Sun) */
1846 type = read_type (pp, objfile);
1847 type = make_cv_type (TYPE_CONST (type), 1, type,
1848 dbx_lookup_type (typenums, objfile));
1852 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1853 { /* Member (class & variable) type */
1854 /* FIXME -- we should be doing smash_to_XXX types here. */
1856 struct type *domain = read_type (pp, objfile);
1857 struct type *memtype;
1860 /* Invalid member type data format. */
1861 return error_type (pp, objfile);
1864 memtype = read_type (pp, objfile);
1865 type = dbx_alloc_type (typenums, objfile);
1866 smash_to_memberptr_type (type, domain, memtype);
1869 /* type attribute */
1873 /* Skip to the semicolon. */
1874 while (**pp != ';' && **pp != '\0')
1877 return error_type (pp, objfile);
1879 ++ * pp; /* Skip the semicolon. */
1883 case 's': /* Size attribute */
1884 type_size = atoi (attr + 1);
1889 case 'S': /* String attribute */
1890 /* FIXME: check to see if following type is array? */
1894 case 'V': /* Vector attribute */
1895 /* FIXME: check to see if following type is array? */
1900 /* Ignore unrecognized type attributes, so future compilers
1901 can invent new ones. */
1909 case '#': /* Method (class & fn) type */
1910 if ((*pp)[0] == '#')
1912 /* We'll get the parameter types from the name. */
1913 struct type *return_type;
1916 return_type = read_type (pp, objfile);
1917 if (*(*pp)++ != ';')
1918 complaint (&symfile_complaints,
1919 _("invalid (minimal) member type "
1920 "data format at symtab pos %d."),
1922 type = allocate_stub_method (return_type);
1923 if (typenums[0] != -1)
1924 *dbx_lookup_type (typenums, objfile) = type;
1928 struct type *domain = read_type (pp, objfile);
1929 struct type *return_type;
1934 /* Invalid member type data format. */
1935 return error_type (pp, objfile);
1939 return_type = read_type (pp, objfile);
1940 args = read_args (pp, ';', objfile, &nargs, &varargs);
1942 return error_type (pp, objfile);
1943 type = dbx_alloc_type (typenums, objfile);
1944 smash_to_method_type (type, domain, return_type, args,
1949 case 'r': /* Range type */
1950 type = read_range_type (pp, typenums, type_size, objfile);
1951 if (typenums[0] != -1)
1952 *dbx_lookup_type (typenums, objfile) = type;
1957 /* Sun ACC builtin int type */
1958 type = read_sun_builtin_type (pp, typenums, objfile);
1959 if (typenums[0] != -1)
1960 *dbx_lookup_type (typenums, objfile) = type;
1964 case 'R': /* Sun ACC builtin float type */
1965 type = read_sun_floating_type (pp, typenums, objfile);
1966 if (typenums[0] != -1)
1967 *dbx_lookup_type (typenums, objfile) = type;
1970 case 'e': /* Enumeration type */
1971 type = dbx_alloc_type (typenums, objfile);
1972 type = read_enum_type (pp, type, objfile);
1973 if (typenums[0] != -1)
1974 *dbx_lookup_type (typenums, objfile) = type;
1977 case 's': /* Struct type */
1978 case 'u': /* Union type */
1980 enum type_code type_code = TYPE_CODE_UNDEF;
1981 type = dbx_alloc_type (typenums, objfile);
1982 switch (type_descriptor)
1985 type_code = TYPE_CODE_STRUCT;
1988 type_code = TYPE_CODE_UNION;
1991 type = read_struct_type (pp, type, type_code, objfile);
1995 case 'a': /* Array type */
1997 return error_type (pp, objfile);
2000 type = dbx_alloc_type (typenums, objfile);
2001 type = read_array_type (pp, type, objfile);
2003 TYPE_CODE (type) = TYPE_CODE_STRING;
2005 make_vector_type (type);
2008 case 'S': /* Set type */
2009 type1 = read_type (pp, objfile);
2010 type = create_set_type ((struct type *) NULL, type1);
2011 if (typenums[0] != -1)
2012 *dbx_lookup_type (typenums, objfile) = type;
2016 --*pp; /* Go back to the symbol in error. */
2017 /* Particularly important if it was \0! */
2018 return error_type (pp, objfile);
2023 warning (_("GDB internal error, type is NULL in stabsread.c."));
2024 return error_type (pp, objfile);
2027 /* Size specified in a type attribute overrides any other size. */
2028 if (type_size != -1)
2029 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2034 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2035 Return the proper type node for a given builtin type number. */
2037 static const struct objfile_data *rs6000_builtin_type_data;
2039 static struct type *
2040 rs6000_builtin_type (int typenum, struct objfile *objfile)
2042 struct type **negative_types = objfile_data (objfile,
2043 rs6000_builtin_type_data);
2045 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2046 #define NUMBER_RECOGNIZED 34
2047 struct type *rettype = NULL;
2049 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2051 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
2052 return objfile_type (objfile)->builtin_error;
2055 if (!negative_types)
2057 /* This includes an empty slot for type number -0. */
2058 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2059 NUMBER_RECOGNIZED + 1, struct type *);
2060 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2063 if (negative_types[-typenum] != NULL)
2064 return negative_types[-typenum];
2066 #if TARGET_CHAR_BIT != 8
2067 #error This code wrong for TARGET_CHAR_BIT not 8
2068 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2069 that if that ever becomes not true, the correct fix will be to
2070 make the size in the struct type to be in bits, not in units of
2077 /* The size of this and all the other types are fixed, defined
2078 by the debugging format. If there is a type called "int" which
2079 is other than 32 bits, then it should use a new negative type
2080 number (or avoid negative type numbers for that case).
2081 See stabs.texinfo. */
2082 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", objfile);
2085 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", objfile);
2088 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", objfile);
2091 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", objfile);
2094 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
2095 "unsigned char", objfile);
2098 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", objfile);
2101 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
2102 "unsigned short", objfile);
2105 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2106 "unsigned int", objfile);
2109 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2110 "unsigned", objfile);
2113 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2114 "unsigned long", objfile);
2117 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", objfile);
2120 /* IEEE single precision (32 bit). */
2121 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", objfile);
2124 /* IEEE double precision (64 bit). */
2125 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", objfile);
2128 /* This is an IEEE double on the RS/6000, and different machines with
2129 different sizes for "long double" should use different negative
2130 type numbers. See stabs.texinfo. */
2131 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", objfile);
2134 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", objfile);
2137 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2138 "boolean", objfile);
2141 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", objfile);
2144 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", objfile);
2147 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", objfile);
2150 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2151 "character", objfile);
2154 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2155 "logical*1", objfile);
2158 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2159 "logical*2", objfile);
2162 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2163 "logical*4", objfile);
2166 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2167 "logical", objfile);
2170 /* Complex type consisting of two IEEE single precision values. */
2171 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", objfile);
2172 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2176 /* Complex type consisting of two IEEE double precision values. */
2177 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2178 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2182 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", objfile);
2185 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", objfile);
2188 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", objfile);
2191 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", objfile);
2194 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", objfile);
2197 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2198 "unsigned long long", objfile);
2201 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2202 "logical*8", objfile);
2205 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", objfile);
2208 negative_types[-typenum] = rettype;
2212 /* This page contains subroutines of read_type. */
2214 /* Wrapper around method_name_from_physname to flag a complaint
2215 if there is an error. */
2218 stabs_method_name_from_physname (const char *physname)
2222 method_name = method_name_from_physname (physname);
2224 if (method_name == NULL)
2226 complaint (&symfile_complaints,
2227 _("Method has bad physname %s\n"), physname);
2234 /* Read member function stabs info for C++ classes. The form of each member
2237 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2239 An example with two member functions is:
2241 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2243 For the case of overloaded operators, the format is op$::*.funcs, where
2244 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2245 name (such as `+=') and `.' marks the end of the operator name.
2247 Returns 1 for success, 0 for failure. */
2250 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2251 struct objfile *objfile)
2258 struct next_fnfield *next;
2259 struct fn_field fn_field;
2262 struct type *look_ahead_type;
2263 struct next_fnfieldlist *new_fnlist;
2264 struct next_fnfield *new_sublist;
2268 /* Process each list until we find something that is not a member function
2269 or find the end of the functions. */
2273 /* We should be positioned at the start of the function name.
2274 Scan forward to find the first ':' and if it is not the
2275 first of a "::" delimiter, then this is not a member function. */
2287 look_ahead_type = NULL;
2290 new_fnlist = (struct next_fnfieldlist *)
2291 xmalloc (sizeof (struct next_fnfieldlist));
2292 make_cleanup (xfree, new_fnlist);
2293 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
2295 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2297 /* This is a completely wierd case. In order to stuff in the
2298 names that might contain colons (the usual name delimiter),
2299 Mike Tiemann defined a different name format which is
2300 signalled if the identifier is "op$". In that case, the
2301 format is "op$::XXXX." where XXXX is the name. This is
2302 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2303 /* This lets the user type "break operator+".
2304 We could just put in "+" as the name, but that wouldn't
2306 static char opname[32] = "op$";
2307 char *o = opname + 3;
2309 /* Skip past '::'. */
2312 STABS_CONTINUE (pp, objfile);
2318 main_fn_name = savestring (opname, o - opname);
2324 main_fn_name = savestring (*pp, p - *pp);
2325 /* Skip past '::'. */
2328 new_fnlist->fn_fieldlist.name = main_fn_name;
2333 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
2334 make_cleanup (xfree, new_sublist);
2335 memset (new_sublist, 0, sizeof (struct next_fnfield));
2337 /* Check for and handle cretinous dbx symbol name continuation! */
2338 if (look_ahead_type == NULL)
2341 STABS_CONTINUE (pp, objfile);
2343 new_sublist->fn_field.type = read_type (pp, objfile);
2346 /* Invalid symtab info for member function. */
2352 /* g++ version 1 kludge */
2353 new_sublist->fn_field.type = look_ahead_type;
2354 look_ahead_type = NULL;
2364 /* If this is just a stub, then we don't have the real name here. */
2366 if (TYPE_STUB (new_sublist->fn_field.type))
2368 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
2369 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
2370 new_sublist->fn_field.is_stub = 1;
2372 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2375 /* Set this member function's visibility fields. */
2378 case VISIBILITY_PRIVATE:
2379 new_sublist->fn_field.is_private = 1;
2381 case VISIBILITY_PROTECTED:
2382 new_sublist->fn_field.is_protected = 1;
2386 STABS_CONTINUE (pp, objfile);
2389 case 'A': /* Normal functions. */
2390 new_sublist->fn_field.is_const = 0;
2391 new_sublist->fn_field.is_volatile = 0;
2394 case 'B': /* `const' member functions. */
2395 new_sublist->fn_field.is_const = 1;
2396 new_sublist->fn_field.is_volatile = 0;
2399 case 'C': /* `volatile' member function. */
2400 new_sublist->fn_field.is_const = 0;
2401 new_sublist->fn_field.is_volatile = 1;
2404 case 'D': /* `const volatile' member function. */
2405 new_sublist->fn_field.is_const = 1;
2406 new_sublist->fn_field.is_volatile = 1;
2409 case '*': /* File compiled with g++ version 1 --
2415 complaint (&symfile_complaints,
2416 _("const/volatile indicator missing, got '%c'"),
2426 /* virtual member function, followed by index.
2427 The sign bit is set to distinguish pointers-to-methods
2428 from virtual function indicies. Since the array is
2429 in words, the quantity must be shifted left by 1
2430 on 16 bit machine, and by 2 on 32 bit machine, forcing
2431 the sign bit out, and usable as a valid index into
2432 the array. Remove the sign bit here. */
2433 new_sublist->fn_field.voffset =
2434 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2438 STABS_CONTINUE (pp, objfile);
2439 if (**pp == ';' || **pp == '\0')
2441 /* Must be g++ version 1. */
2442 new_sublist->fn_field.fcontext = 0;
2446 /* Figure out from whence this virtual function came.
2447 It may belong to virtual function table of
2448 one of its baseclasses. */
2449 look_ahead_type = read_type (pp, objfile);
2452 /* g++ version 1 overloaded methods. */
2456 new_sublist->fn_field.fcontext = look_ahead_type;
2465 look_ahead_type = NULL;
2471 /* static member function. */
2473 int slen = strlen (main_fn_name);
2475 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2477 /* For static member functions, we can't tell if they
2478 are stubbed, as they are put out as functions, and not as
2480 GCC v2 emits the fully mangled name if
2481 dbxout.c:flag_minimal_debug is not set, so we have to
2482 detect a fully mangled physname here and set is_stub
2483 accordingly. Fully mangled physnames in v2 start with
2484 the member function name, followed by two underscores.
2485 GCC v3 currently always emits stubbed member functions,
2486 but with fully mangled physnames, which start with _Z. */
2487 if (!(strncmp (new_sublist->fn_field.physname,
2488 main_fn_name, slen) == 0
2489 && new_sublist->fn_field.physname[slen] == '_'
2490 && new_sublist->fn_field.physname[slen + 1] == '_'))
2492 new_sublist->fn_field.is_stub = 1;
2499 complaint (&symfile_complaints,
2500 _("member function type missing, got '%c'"),
2502 /* Fall through into normal member function. */
2505 /* normal member function. */
2506 new_sublist->fn_field.voffset = 0;
2507 new_sublist->fn_field.fcontext = 0;
2511 new_sublist->next = sublist;
2512 sublist = new_sublist;
2514 STABS_CONTINUE (pp, objfile);
2516 while (**pp != ';' && **pp != '\0');
2519 STABS_CONTINUE (pp, objfile);
2521 /* Skip GCC 3.X member functions which are duplicates of the callable
2522 constructor/destructor. */
2523 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2524 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2525 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2527 xfree (main_fn_name);
2532 int has_destructor = 0, has_other = 0;
2534 struct next_fnfield *tmp_sublist;
2536 /* Various versions of GCC emit various mostly-useless
2537 strings in the name field for special member functions.
2539 For stub methods, we need to defer correcting the name
2540 until we are ready to unstub the method, because the current
2541 name string is used by gdb_mangle_name. The only stub methods
2542 of concern here are GNU v2 operators; other methods have their
2543 names correct (see caveat below).
2545 For non-stub methods, in GNU v3, we have a complete physname.
2546 Therefore we can safely correct the name now. This primarily
2547 affects constructors and destructors, whose name will be
2548 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2549 operators will also have incorrect names; for instance,
2550 "operator int" will be named "operator i" (i.e. the type is
2553 For non-stub methods in GNU v2, we have no easy way to
2554 know if we have a complete physname or not. For most
2555 methods the result depends on the platform (if CPLUS_MARKER
2556 can be `$' or `.', it will use minimal debug information, or
2557 otherwise the full physname will be included).
2559 Rather than dealing with this, we take a different approach.
2560 For v3 mangled names, we can use the full physname; for v2,
2561 we use cplus_demangle_opname (which is actually v2 specific),
2562 because the only interesting names are all operators - once again
2563 barring the caveat below. Skip this process if any method in the
2564 group is a stub, to prevent our fouling up the workings of
2567 The caveat: GCC 2.95.x (and earlier?) put constructors and
2568 destructors in the same method group. We need to split this
2569 into two groups, because they should have different names.
2570 So for each method group we check whether it contains both
2571 routines whose physname appears to be a destructor (the physnames
2572 for and destructors are always provided, due to quirks in v2
2573 mangling) and routines whose physname does not appear to be a
2574 destructor. If so then we break up the list into two halves.
2575 Even if the constructors and destructors aren't in the same group
2576 the destructor will still lack the leading tilde, so that also
2579 So, to summarize what we expect and handle here:
2581 Given Given Real Real Action
2582 method name physname physname method name
2584 __opi [none] __opi__3Foo operator int opname
2586 Foo _._3Foo _._3Foo ~Foo separate and
2588 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2589 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2592 tmp_sublist = sublist;
2593 while (tmp_sublist != NULL)
2595 if (tmp_sublist->fn_field.is_stub)
2597 if (tmp_sublist->fn_field.physname[0] == '_'
2598 && tmp_sublist->fn_field.physname[1] == 'Z')
2601 if (is_destructor_name (tmp_sublist->fn_field.physname))
2606 tmp_sublist = tmp_sublist->next;
2609 if (has_destructor && has_other)
2611 struct next_fnfieldlist *destr_fnlist;
2612 struct next_fnfield *last_sublist;
2614 /* Create a new fn_fieldlist for the destructors. */
2616 destr_fnlist = (struct next_fnfieldlist *)
2617 xmalloc (sizeof (struct next_fnfieldlist));
2618 make_cleanup (xfree, destr_fnlist);
2619 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
2620 destr_fnlist->fn_fieldlist.name
2621 = obconcat (&objfile->objfile_obstack, "~",
2622 new_fnlist->fn_fieldlist.name, (char *) NULL);
2624 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2625 obstack_alloc (&objfile->objfile_obstack,
2626 sizeof (struct fn_field) * has_destructor);
2627 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2628 sizeof (struct fn_field) * has_destructor);
2629 tmp_sublist = sublist;
2630 last_sublist = NULL;
2632 while (tmp_sublist != NULL)
2634 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2636 tmp_sublist = tmp_sublist->next;
2640 destr_fnlist->fn_fieldlist.fn_fields[i++]
2641 = tmp_sublist->fn_field;
2643 last_sublist->next = tmp_sublist->next;
2645 sublist = tmp_sublist->next;
2646 last_sublist = tmp_sublist;
2647 tmp_sublist = tmp_sublist->next;
2650 destr_fnlist->fn_fieldlist.length = has_destructor;
2651 destr_fnlist->next = fip->fnlist;
2652 fip->fnlist = destr_fnlist;
2654 length -= has_destructor;
2658 /* v3 mangling prevents the use of abbreviated physnames,
2659 so we can do this here. There are stubbed methods in v3
2661 - in -gstabs instead of -gstabs+
2662 - or for static methods, which are output as a function type
2663 instead of a method type. */
2664 char *new_method_name =
2665 stabs_method_name_from_physname (sublist->fn_field.physname);
2667 if (new_method_name != NULL
2668 && strcmp (new_method_name,
2669 new_fnlist->fn_fieldlist.name) != 0)
2671 new_fnlist->fn_fieldlist.name = new_method_name;
2672 xfree (main_fn_name);
2675 xfree (new_method_name);
2677 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2679 new_fnlist->fn_fieldlist.name =
2680 obconcat (&objfile->objfile_obstack,
2681 "~", main_fn_name, (char *)NULL);
2682 xfree (main_fn_name);
2686 char dem_opname[256];
2689 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2690 dem_opname, DMGL_ANSI);
2692 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2695 new_fnlist->fn_fieldlist.name
2696 = obstack_copy0 (&objfile->objfile_obstack,
2697 dem_opname, strlen (dem_opname));
2698 xfree (main_fn_name);
2701 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2702 obstack_alloc (&objfile->objfile_obstack,
2703 sizeof (struct fn_field) * length);
2704 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2705 sizeof (struct fn_field) * length);
2706 for (i = length; (i--, sublist); sublist = sublist->next)
2708 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2711 new_fnlist->fn_fieldlist.length = length;
2712 new_fnlist->next = fip->fnlist;
2713 fip->fnlist = new_fnlist;
2720 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2721 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2722 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2723 memset (TYPE_FN_FIELDLISTS (type), 0,
2724 sizeof (struct fn_fieldlist) * nfn_fields);
2725 TYPE_NFN_FIELDS (type) = nfn_fields;
2731 /* Special GNU C++ name.
2733 Returns 1 for success, 0 for failure. "failure" means that we can't
2734 keep parsing and it's time for error_type(). */
2737 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2738 struct objfile *objfile)
2743 struct type *context;
2753 /* At this point, *pp points to something like "22:23=*22...",
2754 where the type number before the ':' is the "context" and
2755 everything after is a regular type definition. Lookup the
2756 type, find it's name, and construct the field name. */
2758 context = read_type (pp, objfile);
2762 case 'f': /* $vf -- a virtual function table pointer */
2763 name = type_name_no_tag (context);
2768 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2769 vptr_name, name, (char *) NULL);
2772 case 'b': /* $vb -- a virtual bsomethingorother */
2773 name = type_name_no_tag (context);
2776 complaint (&symfile_complaints,
2777 _("C++ abbreviated type name "
2778 "unknown at symtab pos %d"),
2782 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2783 name, (char *) NULL);
2787 invalid_cpp_abbrev_complaint (*pp);
2788 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2789 "INVALID_CPLUSPLUS_ABBREV",
2794 /* At this point, *pp points to the ':'. Skip it and read the
2800 invalid_cpp_abbrev_complaint (*pp);
2803 fip->list->field.type = read_type (pp, objfile);
2805 (*pp)++; /* Skip the comma. */
2812 SET_FIELD_BITPOS (fip->list->field,
2813 read_huge_number (pp, ';', &nbits, 0));
2817 /* This field is unpacked. */
2818 FIELD_BITSIZE (fip->list->field) = 0;
2819 fip->list->visibility = VISIBILITY_PRIVATE;
2823 invalid_cpp_abbrev_complaint (*pp);
2824 /* We have no idea what syntax an unrecognized abbrev would have, so
2825 better return 0. If we returned 1, we would need to at least advance
2826 *pp to avoid an infinite loop. */
2833 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2834 struct type *type, struct objfile *objfile)
2836 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2838 fip->list->field.name =
2839 obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
2842 /* This means we have a visibility for a field coming. */
2846 fip->list->visibility = *(*pp)++;
2850 /* normal dbx-style format, no explicit visibility */
2851 fip->list->visibility = VISIBILITY_PUBLIC;
2854 fip->list->field.type = read_type (pp, objfile);
2859 /* Possible future hook for nested types. */
2862 fip->list->field.bitpos = (long) -2; /* nested type */
2872 /* Static class member. */
2873 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2877 else if (**pp != ',')
2879 /* Bad structure-type format. */
2880 stabs_general_complaint ("bad structure-type format");
2884 (*pp)++; /* Skip the comma. */
2889 SET_FIELD_BITPOS (fip->list->field,
2890 read_huge_number (pp, ',', &nbits, 0));
2893 stabs_general_complaint ("bad structure-type format");
2896 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2899 stabs_general_complaint ("bad structure-type format");
2904 if (FIELD_BITPOS (fip->list->field) == 0
2905 && FIELD_BITSIZE (fip->list->field) == 0)
2907 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2908 it is a field which has been optimized out. The correct stab for
2909 this case is to use VISIBILITY_IGNORE, but that is a recent
2910 invention. (2) It is a 0-size array. For example
2911 union { int num; char str[0]; } foo. Printing _("<no value>" for
2912 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2913 will continue to work, and a 0-size array as a whole doesn't
2914 have any contents to print.
2916 I suspect this probably could also happen with gcc -gstabs (not
2917 -gstabs+) for static fields, and perhaps other C++ extensions.
2918 Hopefully few people use -gstabs with gdb, since it is intended
2919 for dbx compatibility. */
2921 /* Ignore this field. */
2922 fip->list->visibility = VISIBILITY_IGNORE;
2926 /* Detect an unpacked field and mark it as such.
2927 dbx gives a bit size for all fields.
2928 Note that forward refs cannot be packed,
2929 and treat enums as if they had the width of ints. */
2931 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2933 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2934 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2935 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2936 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2938 FIELD_BITSIZE (fip->list->field) = 0;
2940 if ((FIELD_BITSIZE (fip->list->field)
2941 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2942 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2943 && FIELD_BITSIZE (fip->list->field)
2944 == gdbarch_int_bit (gdbarch))
2947 FIELD_BITPOS (fip->list->field) % 8 == 0)
2949 FIELD_BITSIZE (fip->list->field) = 0;
2955 /* Read struct or class data fields. They have the form:
2957 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2959 At the end, we see a semicolon instead of a field.
2961 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2964 The optional VISIBILITY is one of:
2966 '/0' (VISIBILITY_PRIVATE)
2967 '/1' (VISIBILITY_PROTECTED)
2968 '/2' (VISIBILITY_PUBLIC)
2969 '/9' (VISIBILITY_IGNORE)
2971 or nothing, for C style fields with public visibility.
2973 Returns 1 for success, 0 for failure. */
2976 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
2977 struct objfile *objfile)
2980 struct nextfield *new;
2982 /* We better set p right now, in case there are no fields at all... */
2986 /* Read each data member type until we find the terminating ';' at the end of
2987 the data member list, or break for some other reason such as finding the
2988 start of the member function list. */
2989 /* Stab string for structure/union does not end with two ';' in
2990 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2992 while (**pp != ';' && **pp != '\0')
2994 STABS_CONTINUE (pp, objfile);
2995 /* Get space to record the next field's data. */
2996 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
2997 make_cleanup (xfree, new);
2998 memset (new, 0, sizeof (struct nextfield));
2999 new->next = fip->list;
3002 /* Get the field name. */
3005 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3006 unless the CPLUS_MARKER is followed by an underscore, in
3007 which case it is just the name of an anonymous type, which we
3008 should handle like any other type name. */
3010 if (is_cplus_marker (p[0]) && p[1] != '_')
3012 if (!read_cpp_abbrev (fip, pp, type, objfile))
3017 /* Look for the ':' that separates the field name from the field
3018 values. Data members are delimited by a single ':', while member
3019 functions are delimited by a pair of ':'s. When we hit the member
3020 functions (if any), terminate scan loop and return. */
3022 while (*p != ':' && *p != '\0')
3029 /* Check to see if we have hit the member functions yet. */
3034 read_one_struct_field (fip, pp, p, type, objfile);
3036 if (p[0] == ':' && p[1] == ':')
3038 /* (the deleted) chill the list of fields: the last entry (at
3039 the head) is a partially constructed entry which we now
3041 fip->list = fip->list->next;
3046 /* The stabs for C++ derived classes contain baseclass information which
3047 is marked by a '!' character after the total size. This function is
3048 called when we encounter the baseclass marker, and slurps up all the
3049 baseclass information.
3051 Immediately following the '!' marker is the number of base classes that
3052 the class is derived from, followed by information for each base class.
3053 For each base class, there are two visibility specifiers, a bit offset
3054 to the base class information within the derived class, a reference to
3055 the type for the base class, and a terminating semicolon.
3057 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3059 Baseclass information marker __________________|| | | | | | |
3060 Number of baseclasses __________________________| | | | | | |
3061 Visibility specifiers (2) ________________________| | | | | |
3062 Offset in bits from start of class _________________| | | | |
3063 Type number for base class ___________________________| | | |
3064 Visibility specifiers (2) _______________________________| | |
3065 Offset in bits from start of class ________________________| |
3066 Type number of base class ____________________________________|
3068 Return 1 for success, 0 for (error-type-inducing) failure. */
3074 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3075 struct objfile *objfile)
3078 struct nextfield *new;
3086 /* Skip the '!' baseclass information marker. */
3090 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3094 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3100 /* Some stupid compilers have trouble with the following, so break
3101 it up into simpler expressions. */
3102 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3103 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3106 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3109 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3110 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3114 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3116 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3118 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3119 make_cleanup (xfree, new);
3120 memset (new, 0, sizeof (struct nextfield));
3121 new->next = fip->list;
3123 FIELD_BITSIZE (new->field) = 0; /* This should be an unpacked
3126 STABS_CONTINUE (pp, objfile);
3130 /* Nothing to do. */
3133 SET_TYPE_FIELD_VIRTUAL (type, i);
3136 /* Unknown character. Complain and treat it as non-virtual. */
3138 complaint (&symfile_complaints,
3139 _("Unknown virtual character `%c' for baseclass"),
3145 new->visibility = *(*pp)++;
3146 switch (new->visibility)
3148 case VISIBILITY_PRIVATE:
3149 case VISIBILITY_PROTECTED:
3150 case VISIBILITY_PUBLIC:
3153 /* Bad visibility format. Complain and treat it as
3156 complaint (&symfile_complaints,
3157 _("Unknown visibility `%c' for baseclass"),
3159 new->visibility = VISIBILITY_PUBLIC;
3166 /* The remaining value is the bit offset of the portion of the object
3167 corresponding to this baseclass. Always zero in the absence of
3168 multiple inheritance. */
3170 SET_FIELD_BITPOS (new->field, read_huge_number (pp, ',', &nbits, 0));
3175 /* The last piece of baseclass information is the type of the
3176 base class. Read it, and remember it's type name as this
3179 new->field.type = read_type (pp, objfile);
3180 new->field.name = type_name_no_tag (new->field.type);
3182 /* Skip trailing ';' and bump count of number of fields seen. */
3191 /* The tail end of stabs for C++ classes that contain a virtual function
3192 pointer contains a tilde, a %, and a type number.
3193 The type number refers to the base class (possibly this class itself) which
3194 contains the vtable pointer for the current class.
3196 This function is called when we have parsed all the method declarations,
3197 so we can look for the vptr base class info. */
3200 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3201 struct objfile *objfile)
3205 STABS_CONTINUE (pp, objfile);
3207 /* If we are positioned at a ';', then skip it. */
3217 if (**pp == '=' || **pp == '+' || **pp == '-')
3219 /* Obsolete flags that used to indicate the presence
3220 of constructors and/or destructors. */
3224 /* Read either a '%' or the final ';'. */
3225 if (*(*pp)++ == '%')
3227 /* The next number is the type number of the base class
3228 (possibly our own class) which supplies the vtable for
3229 this class. Parse it out, and search that class to find
3230 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3231 and TYPE_VPTR_FIELDNO. */
3236 t = read_type (pp, objfile);
3238 while (*p != '\0' && *p != ';')
3244 /* Premature end of symbol. */
3248 TYPE_VPTR_BASETYPE (type) = t;
3249 if (type == t) /* Our own class provides vtbl ptr. */
3251 for (i = TYPE_NFIELDS (t) - 1;
3252 i >= TYPE_N_BASECLASSES (t);
3255 const char *name = TYPE_FIELD_NAME (t, i);
3257 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3258 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3260 TYPE_VPTR_FIELDNO (type) = i;
3264 /* Virtual function table field not found. */
3265 complaint (&symfile_complaints,
3266 _("virtual function table pointer "
3267 "not found when defining class `%s'"),
3273 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
3284 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3288 for (n = TYPE_NFN_FIELDS (type);
3289 fip->fnlist != NULL;
3290 fip->fnlist = fip->fnlist->next)
3292 --n; /* Circumvent Sun3 compiler bug. */
3293 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3298 /* Create the vector of fields, and record how big it is.
3299 We need this info to record proper virtual function table information
3300 for this class's virtual functions. */
3303 attach_fields_to_type (struct field_info *fip, struct type *type,
3304 struct objfile *objfile)
3307 int non_public_fields = 0;
3308 struct nextfield *scan;
3310 /* Count up the number of fields that we have, as well as taking note of
3311 whether or not there are any non-public fields, which requires us to
3312 allocate and build the private_field_bits and protected_field_bits
3315 for (scan = fip->list; scan != NULL; scan = scan->next)
3318 if (scan->visibility != VISIBILITY_PUBLIC)
3320 non_public_fields++;
3324 /* Now we know how many fields there are, and whether or not there are any
3325 non-public fields. Record the field count, allocate space for the
3326 array of fields, and create blank visibility bitfields if necessary. */
3328 TYPE_NFIELDS (type) = nfields;
3329 TYPE_FIELDS (type) = (struct field *)
3330 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3331 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3333 if (non_public_fields)
3335 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3337 TYPE_FIELD_PRIVATE_BITS (type) =
3338 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3339 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3341 TYPE_FIELD_PROTECTED_BITS (type) =
3342 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3343 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3345 TYPE_FIELD_IGNORE_BITS (type) =
3346 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3347 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3350 /* Copy the saved-up fields into the field vector. Start from the
3351 head of the list, adding to the tail of the field array, so that
3352 they end up in the same order in the array in which they were
3353 added to the list. */
3355 while (nfields-- > 0)
3357 TYPE_FIELD (type, nfields) = fip->list->field;
3358 switch (fip->list->visibility)
3360 case VISIBILITY_PRIVATE:
3361 SET_TYPE_FIELD_PRIVATE (type, nfields);
3364 case VISIBILITY_PROTECTED:
3365 SET_TYPE_FIELD_PROTECTED (type, nfields);
3368 case VISIBILITY_IGNORE:
3369 SET_TYPE_FIELD_IGNORE (type, nfields);
3372 case VISIBILITY_PUBLIC:
3376 /* Unknown visibility. Complain and treat it as public. */
3378 complaint (&symfile_complaints,
3379 _("Unknown visibility `%c' for field"),
3380 fip->list->visibility);
3384 fip->list = fip->list->next;
3390 /* Complain that the compiler has emitted more than one definition for the
3391 structure type TYPE. */
3393 complain_about_struct_wipeout (struct type *type)
3395 const char *name = "";
3396 const char *kind = "";
3398 if (TYPE_TAG_NAME (type))
3400 name = TYPE_TAG_NAME (type);
3401 switch (TYPE_CODE (type))
3403 case TYPE_CODE_STRUCT: kind = "struct "; break;
3404 case TYPE_CODE_UNION: kind = "union "; break;
3405 case TYPE_CODE_ENUM: kind = "enum "; break;
3409 else if (TYPE_NAME (type))
3411 name = TYPE_NAME (type);
3420 complaint (&symfile_complaints,
3421 _("struct/union type gets multiply defined: %s%s"), kind, name);
3424 /* Set the length for all variants of a same main_type, which are
3425 connected in the closed chain.
3427 This is something that needs to be done when a type is defined *after*
3428 some cross references to this type have already been read. Consider
3429 for instance the following scenario where we have the following two
3432 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3433 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3435 A stubbed version of type dummy is created while processing the first
3436 stabs entry. The length of that type is initially set to zero, since
3437 it is unknown at this point. Also, a "constant" variation of type
3438 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3441 The second stabs entry allows us to replace the stubbed definition
3442 with the real definition. However, we still need to adjust the length
3443 of the "constant" variation of that type, as its length was left
3444 untouched during the main type replacement... */
3447 set_length_in_type_chain (struct type *type)
3449 struct type *ntype = TYPE_CHAIN (type);
3451 while (ntype != type)
3453 if (TYPE_LENGTH(ntype) == 0)
3454 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3456 complain_about_struct_wipeout (ntype);
3457 ntype = TYPE_CHAIN (ntype);
3461 /* Read the description of a structure (or union type) and return an object
3462 describing the type.
3464 PP points to a character pointer that points to the next unconsumed token
3465 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3466 *PP will point to "4a:1,0,32;;".
3468 TYPE points to an incomplete type that needs to be filled in.
3470 OBJFILE points to the current objfile from which the stabs information is
3471 being read. (Note that it is redundant in that TYPE also contains a pointer
3472 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3475 static struct type *
3476 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3477 struct objfile *objfile)
3479 struct cleanup *back_to;
3480 struct field_info fi;
3485 /* When describing struct/union/class types in stabs, G++ always drops
3486 all qualifications from the name. So if you've got:
3487 struct A { ... struct B { ... }; ... };
3488 then G++ will emit stabs for `struct A::B' that call it simply
3489 `struct B'. Obviously, if you've got a real top-level definition for
3490 `struct B', or other nested definitions, this is going to cause
3493 Obviously, GDB can't fix this by itself, but it can at least avoid
3494 scribbling on existing structure type objects when new definitions
3496 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3497 || TYPE_STUB (type)))
3499 complain_about_struct_wipeout (type);
3501 /* It's probably best to return the type unchanged. */
3505 back_to = make_cleanup (null_cleanup, 0);
3507 INIT_CPLUS_SPECIFIC (type);
3508 TYPE_CODE (type) = type_code;
3509 TYPE_STUB (type) = 0;
3511 /* First comes the total size in bytes. */
3516 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3519 do_cleanups (back_to);
3520 return error_type (pp, objfile);
3522 set_length_in_type_chain (type);
3525 /* Now read the baseclasses, if any, read the regular C struct or C++
3526 class member fields, attach the fields to the type, read the C++
3527 member functions, attach them to the type, and then read any tilde
3528 field (baseclass specifier for the class holding the main vtable). */
3530 if (!read_baseclasses (&fi, pp, type, objfile)
3531 || !read_struct_fields (&fi, pp, type, objfile)
3532 || !attach_fields_to_type (&fi, type, objfile)
3533 || !read_member_functions (&fi, pp, type, objfile)
3534 || !attach_fn_fields_to_type (&fi, type)
3535 || !read_tilde_fields (&fi, pp, type, objfile))
3537 type = error_type (pp, objfile);
3540 do_cleanups (back_to);
3544 /* Read a definition of an array type,
3545 and create and return a suitable type object.
3546 Also creates a range type which represents the bounds of that
3549 static struct type *
3550 read_array_type (char **pp, struct type *type,
3551 struct objfile *objfile)
3553 struct type *index_type, *element_type, *range_type;
3558 /* Format of an array type:
3559 "ar<index type>;lower;upper;<array_contents_type>".
3560 OS9000: "arlower,upper;<array_contents_type>".
3562 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3563 for these, produce a type like float[][]. */
3566 index_type = read_type (pp, objfile);
3568 /* Improper format of array type decl. */
3569 return error_type (pp, objfile);
3573 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3578 lower = read_huge_number (pp, ';', &nbits, 0);
3581 return error_type (pp, objfile);
3583 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3588 upper = read_huge_number (pp, ';', &nbits, 0);
3590 return error_type (pp, objfile);
3592 element_type = read_type (pp, objfile);
3601 create_range_type ((struct type *) NULL, index_type, lower, upper);
3602 type = create_array_type (type, element_type, range_type);
3608 /* Read a definition of an enumeration type,
3609 and create and return a suitable type object.
3610 Also defines the symbols that represent the values of the type. */
3612 static struct type *
3613 read_enum_type (char **pp, struct type *type,
3614 struct objfile *objfile)
3616 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3622 struct pending **symlist;
3623 struct pending *osyms, *syms;
3626 int unsigned_enum = 1;
3629 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3630 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3631 to do? For now, force all enum values to file scope. */
3632 if (within_function)
3633 symlist = &local_symbols;
3636 symlist = &file_symbols;
3638 o_nsyms = osyms ? osyms->nsyms : 0;
3640 /* The aix4 compiler emits an extra field before the enum members;
3641 my guess is it's a type of some sort. Just ignore it. */
3644 /* Skip over the type. */
3648 /* Skip over the colon. */
3652 /* Read the value-names and their values.
3653 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3654 A semicolon or comma instead of a NAME means the end. */
3655 while (**pp && **pp != ';' && **pp != ',')
3657 STABS_CONTINUE (pp, objfile);
3661 name = obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
3663 n = read_huge_number (pp, ',', &nbits, 0);
3665 return error_type (pp, objfile);
3667 sym = allocate_symbol (objfile);
3668 SYMBOL_SET_LINKAGE_NAME (sym, name);
3669 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
3670 &objfile->objfile_obstack);
3671 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
3672 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3673 SYMBOL_VALUE (sym) = n;
3676 add_symbol_to_list (sym, symlist);
3681 (*pp)++; /* Skip the semicolon. */
3683 /* Now fill in the fields of the type-structure. */
3685 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3686 set_length_in_type_chain (type);
3687 TYPE_CODE (type) = TYPE_CODE_ENUM;
3688 TYPE_STUB (type) = 0;
3690 TYPE_UNSIGNED (type) = 1;
3691 TYPE_NFIELDS (type) = nsyms;
3692 TYPE_FIELDS (type) = (struct field *)
3693 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3694 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3696 /* Find the symbols for the values and put them into the type.
3697 The symbols can be found in the symlist that we put them on
3698 to cause them to be defined. osyms contains the old value
3699 of that symlist; everything up to there was defined by us. */
3700 /* Note that we preserve the order of the enum constants, so
3701 that in something like "enum {FOO, LAST_THING=FOO}" we print
3702 FOO, not LAST_THING. */
3704 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3706 int last = syms == osyms ? o_nsyms : 0;
3707 int j = syms->nsyms;
3709 for (; --j >= last; --n)
3711 struct symbol *xsym = syms->symbol[j];
3713 SYMBOL_TYPE (xsym) = type;
3714 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3715 SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
3716 TYPE_FIELD_BITSIZE (type, n) = 0;
3725 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3726 typedefs in every file (for int, long, etc):
3728 type = b <signed> <width> <format type>; <offset>; <nbits>
3730 optional format type = c or b for char or boolean.
3731 offset = offset from high order bit to start bit of type.
3732 width is # bytes in object of this type, nbits is # bits in type.
3734 The width/offset stuff appears to be for small objects stored in
3735 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3738 static struct type *
3739 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3744 enum type_code code = TYPE_CODE_INT;
3755 return error_type (pp, objfile);
3759 /* For some odd reason, all forms of char put a c here. This is strange
3760 because no other type has this honor. We can safely ignore this because
3761 we actually determine 'char'acterness by the number of bits specified in
3763 Boolean forms, e.g Fortran logical*X, put a b here. */
3767 else if (**pp == 'b')
3769 code = TYPE_CODE_BOOL;
3773 /* The first number appears to be the number of bytes occupied
3774 by this type, except that unsigned short is 4 instead of 2.
3775 Since this information is redundant with the third number,
3776 we will ignore it. */
3777 read_huge_number (pp, ';', &nbits, 0);
3779 return error_type (pp, objfile);
3781 /* The second number is always 0, so ignore it too. */
3782 read_huge_number (pp, ';', &nbits, 0);
3784 return error_type (pp, objfile);
3786 /* The third number is the number of bits for this type. */
3787 type_bits = read_huge_number (pp, 0, &nbits, 0);
3789 return error_type (pp, objfile);
3790 /* The type *should* end with a semicolon. If it are embedded
3791 in a larger type the semicolon may be the only way to know where
3792 the type ends. If this type is at the end of the stabstring we
3793 can deal with the omitted semicolon (but we don't have to like
3794 it). Don't bother to complain(), Sun's compiler omits the semicolon
3800 return init_type (TYPE_CODE_VOID, 1,
3801 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3804 return init_type (code,
3805 type_bits / TARGET_CHAR_BIT,
3806 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3810 static struct type *
3811 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3816 struct type *rettype;
3818 /* The first number has more details about the type, for example
3820 details = read_huge_number (pp, ';', &nbits, 0);
3822 return error_type (pp, objfile);
3824 /* The second number is the number of bytes occupied by this type. */
3825 nbytes = read_huge_number (pp, ';', &nbits, 0);
3827 return error_type (pp, objfile);
3829 if (details == NF_COMPLEX || details == NF_COMPLEX16
3830 || details == NF_COMPLEX32)
3832 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
3833 TYPE_TARGET_TYPE (rettype)
3834 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
3838 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
3841 /* Read a number from the string pointed to by *PP.
3842 The value of *PP is advanced over the number.
3843 If END is nonzero, the character that ends the
3844 number must match END, or an error happens;
3845 and that character is skipped if it does match.
3846 If END is zero, *PP is left pointing to that character.
3848 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3849 the number is represented in an octal representation, assume that
3850 it is represented in a 2's complement representation with a size of
3851 TWOS_COMPLEMENT_BITS.
3853 If the number fits in a long, set *BITS to 0 and return the value.
3854 If not, set *BITS to be the number of bits in the number and return 0.
3856 If encounter garbage, set *BITS to -1 and return 0. */
3859 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3870 int twos_complement_representation = 0;
3878 /* Leading zero means octal. GCC uses this to output values larger
3879 than an int (because that would be hard in decimal). */
3886 /* Skip extra zeros. */
3890 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3892 /* Octal, possibly signed. Check if we have enough chars for a
3898 while ((c = *p1) >= '0' && c < '8')
3902 if (len > twos_complement_bits / 3
3903 || (twos_complement_bits % 3 == 0
3904 && len == twos_complement_bits / 3))
3906 /* Ok, we have enough characters for a signed value, check
3907 for signness by testing if the sign bit is set. */
3908 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3910 if (c & (1 << sign_bit))
3912 /* Definitely signed. */
3913 twos_complement_representation = 1;
3919 upper_limit = LONG_MAX / radix;
3921 while ((c = *p++) >= '0' && c < ('0' + radix))
3923 if (n <= upper_limit)
3925 if (twos_complement_representation)
3927 /* Octal, signed, twos complement representation. In
3928 this case, n is the corresponding absolute value. */
3931 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3943 /* unsigned representation */
3945 n += c - '0'; /* FIXME this overflows anyway. */
3951 /* This depends on large values being output in octal, which is
3958 /* Ignore leading zeroes. */
3962 else if (c == '2' || c == '3')
3983 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
3985 /* We were supposed to parse a number with maximum
3986 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3997 /* Large decimal constants are an error (because it is hard to
3998 count how many bits are in them). */
4004 /* -0x7f is the same as 0x80. So deal with it by adding one to
4005 the number of bits. Two's complement represention octals
4006 can't have a '-' in front. */
4007 if (sign == -1 && !twos_complement_representation)
4018 /* It's *BITS which has the interesting information. */
4022 static struct type *
4023 read_range_type (char **pp, int typenums[2], int type_size,
4024 struct objfile *objfile)
4026 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4027 char *orig_pp = *pp;
4032 struct type *result_type;
4033 struct type *index_type = NULL;
4035 /* First comes a type we are a subrange of.
4036 In C it is usually 0, 1 or the type being defined. */
4037 if (read_type_number (pp, rangenums) != 0)
4038 return error_type (pp, objfile);
4039 self_subrange = (rangenums[0] == typenums[0] &&
4040 rangenums[1] == typenums[1]);
4045 index_type = read_type (pp, objfile);
4048 /* A semicolon should now follow; skip it. */
4052 /* The remaining two operands are usually lower and upper bounds
4053 of the range. But in some special cases they mean something else. */
4054 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4055 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4057 if (n2bits == -1 || n3bits == -1)
4058 return error_type (pp, objfile);
4061 goto handle_true_range;
4063 /* If limits are huge, must be large integral type. */
4064 if (n2bits != 0 || n3bits != 0)
4066 char got_signed = 0;
4067 char got_unsigned = 0;
4068 /* Number of bits in the type. */
4071 /* If a type size attribute has been specified, the bounds of
4072 the range should fit in this size. If the lower bounds needs
4073 more bits than the upper bound, then the type is signed. */
4074 if (n2bits <= type_size && n3bits <= type_size)
4076 if (n2bits == type_size && n2bits > n3bits)
4082 /* Range from 0 to <large number> is an unsigned large integral type. */
4083 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4088 /* Range from <large number> to <large number>-1 is a large signed
4089 integral type. Take care of the case where <large number> doesn't
4090 fit in a long but <large number>-1 does. */
4091 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4092 || (n2bits != 0 && n3bits == 0
4093 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4100 if (got_signed || got_unsigned)
4102 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
4103 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
4107 return error_type (pp, objfile);
4110 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4111 if (self_subrange && n2 == 0 && n3 == 0)
4112 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4114 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4115 is the width in bytes.
4117 Fortran programs appear to use this for complex types also. To
4118 distinguish between floats and complex, g77 (and others?) seem
4119 to use self-subranges for the complexes, and subranges of int for
4122 Also note that for complexes, g77 sets n2 to the size of one of
4123 the member floats, not the whole complex beast. My guess is that
4124 this was to work well with pre-COMPLEX versions of gdb. */
4126 if (n3 == 0 && n2 > 0)
4128 struct type *float_type
4129 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
4133 struct type *complex_type =
4134 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
4136 TYPE_TARGET_TYPE (complex_type) = float_type;
4137 return complex_type;
4143 /* If the upper bound is -1, it must really be an unsigned integral. */
4145 else if (n2 == 0 && n3 == -1)
4147 int bits = type_size;
4151 /* We don't know its size. It is unsigned int or unsigned
4152 long. GCC 2.3.3 uses this for long long too, but that is
4153 just a GDB 3.5 compatibility hack. */
4154 bits = gdbarch_int_bit (gdbarch);
4157 return init_type (TYPE_CODE_INT, bits / TARGET_CHAR_BIT,
4158 TYPE_FLAG_UNSIGNED, NULL, objfile);
4161 /* Special case: char is defined (Who knows why) as a subrange of
4162 itself with range 0-127. */
4163 else if (self_subrange && n2 == 0 && n3 == 127)
4164 return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile);
4166 /* We used to do this only for subrange of self or subrange of int. */
4169 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4170 "unsigned long", and we already checked for that,
4171 so don't need to test for it here. */
4174 /* n3 actually gives the size. */
4175 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
4178 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4179 unsigned n-byte integer. But do require n to be a power of
4180 two; we don't want 3- and 5-byte integers flying around. */
4186 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4189 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4190 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4194 /* I think this is for Convex "long long". Since I don't know whether
4195 Convex sets self_subrange, I also accept that particular size regardless
4196 of self_subrange. */
4197 else if (n3 == 0 && n2 < 0
4199 || n2 == -gdbarch_long_long_bit
4200 (gdbarch) / TARGET_CHAR_BIT))
4201 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4202 else if (n2 == -n3 - 1)
4205 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4207 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4208 if (n3 == 0x7fffffff)
4209 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4212 /* We have a real range type on our hands. Allocate space and
4213 return a real pointer. */
4217 index_type = objfile_type (objfile)->builtin_int;
4219 index_type = *dbx_lookup_type (rangenums, objfile);
4220 if (index_type == NULL)
4222 /* Does this actually ever happen? Is that why we are worrying
4223 about dealing with it rather than just calling error_type? */
4225 complaint (&symfile_complaints,
4226 _("base type %d of range type is not defined"), rangenums[1]);
4228 index_type = objfile_type (objfile)->builtin_int;
4231 result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
4232 return (result_type);
4235 /* Read in an argument list. This is a list of types, separated by commas
4236 and terminated with END. Return the list of types read in, or NULL
4237 if there is an error. */
4239 static struct field *
4240 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4243 /* FIXME! Remove this arbitrary limit! */
4244 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4251 /* Invalid argument list: no ','. */
4254 STABS_CONTINUE (pp, objfile);
4255 types[n++] = read_type (pp, objfile);
4257 (*pp)++; /* get past `end' (the ':' character). */
4261 /* We should read at least the THIS parameter here. Some broken stabs
4262 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4263 have been present ";-16,(0,43)" reference instead. This way the
4264 excessive ";" marker prematurely stops the parameters parsing. */
4266 complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
4269 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4277 rval = (struct field *) xmalloc (n * sizeof (struct field));
4278 memset (rval, 0, n * sizeof (struct field));
4279 for (i = 0; i < n; i++)
4280 rval[i].type = types[i];
4285 /* Common block handling. */
4287 /* List of symbols declared since the last BCOMM. This list is a tail
4288 of local_symbols. When ECOMM is seen, the symbols on the list
4289 are noted so their proper addresses can be filled in later,
4290 using the common block base address gotten from the assembler
4293 static struct pending *common_block;
4294 static int common_block_i;
4296 /* Name of the current common block. We get it from the BCOMM instead of the
4297 ECOMM to match IBM documentation (even though IBM puts the name both places
4298 like everyone else). */
4299 static char *common_block_name;
4301 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4302 to remain after this function returns. */
4305 common_block_start (char *name, struct objfile *objfile)
4307 if (common_block_name != NULL)
4309 complaint (&symfile_complaints,
4310 _("Invalid symbol data: common block within common block"));
4312 common_block = local_symbols;
4313 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4314 common_block_name = obstack_copy0 (&objfile->objfile_obstack,
4315 name, strlen (name));
4318 /* Process a N_ECOMM symbol. */
4321 common_block_end (struct objfile *objfile)
4323 /* Symbols declared since the BCOMM are to have the common block
4324 start address added in when we know it. common_block and
4325 common_block_i point to the first symbol after the BCOMM in
4326 the local_symbols list; copy the list and hang it off the
4327 symbol for the common block name for later fixup. */
4330 struct pending *new = 0;
4331 struct pending *next;
4334 if (common_block_name == NULL)
4336 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4340 sym = allocate_symbol (objfile);
4341 /* Note: common_block_name already saved on objfile_obstack. */
4342 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4343 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
4345 /* Now we copy all the symbols which have been defined since the BCOMM. */
4347 /* Copy all the struct pendings before common_block. */
4348 for (next = local_symbols;
4349 next != NULL && next != common_block;
4352 for (j = 0; j < next->nsyms; j++)
4353 add_symbol_to_list (next->symbol[j], &new);
4356 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4357 NULL, it means copy all the local symbols (which we already did
4360 if (common_block != NULL)
4361 for (j = common_block_i; j < common_block->nsyms; j++)
4362 add_symbol_to_list (common_block->symbol[j], &new);
4364 SYMBOL_TYPE (sym) = (struct type *) new;
4366 /* Should we be putting local_symbols back to what it was?
4369 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4370 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4371 global_sym_chain[i] = sym;
4372 common_block_name = NULL;
4375 /* Add a common block's start address to the offset of each symbol
4376 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4377 the common block name). */
4380 fix_common_block (struct symbol *sym, CORE_ADDR valu)
4382 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4384 for (; next; next = next->next)
4388 for (j = next->nsyms - 1; j >= 0; j--)
4389 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4395 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4396 See add_undefined_type for more details. */
4399 add_undefined_type_noname (struct type *type, int typenums[2])
4403 nat.typenums[0] = typenums [0];
4404 nat.typenums[1] = typenums [1];
4407 if (noname_undefs_length == noname_undefs_allocated)
4409 noname_undefs_allocated *= 2;
4410 noname_undefs = (struct nat *)
4411 xrealloc ((char *) noname_undefs,
4412 noname_undefs_allocated * sizeof (struct nat));
4414 noname_undefs[noname_undefs_length++] = nat;
4417 /* Add TYPE to the UNDEF_TYPES vector.
4418 See add_undefined_type for more details. */
4421 add_undefined_type_1 (struct type *type)
4423 if (undef_types_length == undef_types_allocated)
4425 undef_types_allocated *= 2;
4426 undef_types = (struct type **)
4427 xrealloc ((char *) undef_types,
4428 undef_types_allocated * sizeof (struct type *));
4430 undef_types[undef_types_length++] = type;
4433 /* What about types defined as forward references inside of a small lexical
4435 /* Add a type to the list of undefined types to be checked through
4436 once this file has been read in.
4438 In practice, we actually maintain two such lists: The first list
4439 (UNDEF_TYPES) is used for types whose name has been provided, and
4440 concerns forward references (eg 'xs' or 'xu' forward references);
4441 the second list (NONAME_UNDEFS) is used for types whose name is
4442 unknown at creation time, because they were referenced through
4443 their type number before the actual type was declared.
4444 This function actually adds the given type to the proper list. */
4447 add_undefined_type (struct type *type, int typenums[2])
4449 if (TYPE_TAG_NAME (type) == NULL)
4450 add_undefined_type_noname (type, typenums);
4452 add_undefined_type_1 (type);
4455 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4458 cleanup_undefined_types_noname (struct objfile *objfile)
4462 for (i = 0; i < noname_undefs_length; i++)
4464 struct nat nat = noname_undefs[i];
4467 type = dbx_lookup_type (nat.typenums, objfile);
4468 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4470 /* The instance flags of the undefined type are still unset,
4471 and needs to be copied over from the reference type.
4472 Since replace_type expects them to be identical, we need
4473 to set these flags manually before hand. */
4474 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4475 replace_type (nat.type, *type);
4479 noname_undefs_length = 0;
4482 /* Go through each undefined type, see if it's still undefined, and fix it
4483 up if possible. We have two kinds of undefined types:
4485 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4486 Fix: update array length using the element bounds
4487 and the target type's length.
4488 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4489 yet defined at the time a pointer to it was made.
4490 Fix: Do a full lookup on the struct/union tag. */
4493 cleanup_undefined_types_1 (void)
4497 /* Iterate over every undefined type, and look for a symbol whose type
4498 matches our undefined type. The symbol matches if:
4499 1. It is a typedef in the STRUCT domain;
4500 2. It has the same name, and same type code;
4501 3. The instance flags are identical.
4503 It is important to check the instance flags, because we have seen
4504 examples where the debug info contained definitions such as:
4506 "foo_t:t30=B31=xefoo_t:"
4508 In this case, we have created an undefined type named "foo_t" whose
4509 instance flags is null (when processing "xefoo_t"), and then created
4510 another type with the same name, but with different instance flags
4511 ('B' means volatile). I think that the definition above is wrong,
4512 since the same type cannot be volatile and non-volatile at the same
4513 time, but we need to be able to cope with it when it happens. The
4514 approach taken here is to treat these two types as different. */
4516 for (type = undef_types; type < undef_types + undef_types_length; type++)
4518 switch (TYPE_CODE (*type))
4521 case TYPE_CODE_STRUCT:
4522 case TYPE_CODE_UNION:
4523 case TYPE_CODE_ENUM:
4525 /* Check if it has been defined since. Need to do this here
4526 as well as in check_typedef to deal with the (legitimate in
4527 C though not C++) case of several types with the same name
4528 in different source files. */
4529 if (TYPE_STUB (*type))
4531 struct pending *ppt;
4533 /* Name of the type, without "struct" or "union". */
4534 const char *typename = TYPE_TAG_NAME (*type);
4536 if (typename == NULL)
4538 complaint (&symfile_complaints, _("need a type name"));
4541 for (ppt = file_symbols; ppt; ppt = ppt->next)
4543 for (i = 0; i < ppt->nsyms; i++)
4545 struct symbol *sym = ppt->symbol[i];
4547 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4548 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4549 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4551 && (TYPE_INSTANCE_FLAGS (*type) ==
4552 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4553 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4555 replace_type (*type, SYMBOL_TYPE (sym));
4564 complaint (&symfile_complaints,
4565 _("forward-referenced types left unresolved, "
4573 undef_types_length = 0;
4576 /* Try to fix all the undefined types we ecountered while processing
4580 cleanup_undefined_stabs_types (struct objfile *objfile)
4582 cleanup_undefined_types_1 ();
4583 cleanup_undefined_types_noname (objfile);
4586 /* Scan through all of the global symbols defined in the object file,
4587 assigning values to the debugging symbols that need to be assigned
4588 to. Get these symbols from the minimal symbol table. */
4591 scan_file_globals (struct objfile *objfile)
4594 struct minimal_symbol *msymbol;
4595 struct symbol *sym, *prev;
4596 struct objfile *resolve_objfile;
4598 /* SVR4 based linkers copy referenced global symbols from shared
4599 libraries to the main executable.
4600 If we are scanning the symbols for a shared library, try to resolve
4601 them from the minimal symbols of the main executable first. */
4603 if (symfile_objfile && objfile != symfile_objfile)
4604 resolve_objfile = symfile_objfile;
4606 resolve_objfile = objfile;
4610 /* Avoid expensive loop through all minimal symbols if there are
4611 no unresolved symbols. */
4612 for (hash = 0; hash < HASHSIZE; hash++)
4614 if (global_sym_chain[hash])
4617 if (hash >= HASHSIZE)
4620 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4624 /* Skip static symbols. */
4625 switch (MSYMBOL_TYPE (msymbol))
4637 /* Get the hash index and check all the symbols
4638 under that hash index. */
4640 hash = hashname (SYMBOL_LINKAGE_NAME (msymbol));
4642 for (sym = global_sym_chain[hash]; sym;)
4644 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol),
4645 SYMBOL_LINKAGE_NAME (sym)) == 0)
4647 /* Splice this symbol out of the hash chain and
4648 assign the value we have to it. */
4651 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4655 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4658 /* Check to see whether we need to fix up a common block. */
4659 /* Note: this code might be executed several times for
4660 the same symbol if there are multiple references. */
4663 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4665 fix_common_block (sym,
4666 SYMBOL_VALUE_ADDRESS (msymbol));
4670 SYMBOL_VALUE_ADDRESS (sym)
4671 = SYMBOL_VALUE_ADDRESS (msymbol);
4673 SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
4678 sym = SYMBOL_VALUE_CHAIN (prev);
4682 sym = global_sym_chain[hash];
4688 sym = SYMBOL_VALUE_CHAIN (sym);
4692 if (resolve_objfile == objfile)
4694 resolve_objfile = objfile;
4697 /* Change the storage class of any remaining unresolved globals to
4698 LOC_UNRESOLVED and remove them from the chain. */
4699 for (hash = 0; hash < HASHSIZE; hash++)
4701 sym = global_sym_chain[hash];
4705 sym = SYMBOL_VALUE_CHAIN (sym);
4707 /* Change the symbol address from the misleading chain value
4709 SYMBOL_VALUE_ADDRESS (prev) = 0;
4711 /* Complain about unresolved common block symbols. */
4712 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4713 SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
4715 complaint (&symfile_complaints,
4716 _("%s: common block `%s' from "
4717 "global_sym_chain unresolved"),
4718 objfile->name, SYMBOL_PRINT_NAME (prev));
4721 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4724 /* Initialize anything that needs initializing when starting to read
4725 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4729 stabsread_init (void)
4733 /* Initialize anything that needs initializing when a completely new
4734 symbol file is specified (not just adding some symbols from another
4735 file, e.g. a shared library). */
4738 stabsread_new_init (void)
4740 /* Empty the hash table of global syms looking for values. */
4741 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4744 /* Initialize anything that needs initializing at the same time as
4745 start_symtab() is called. */
4750 global_stabs = NULL; /* AIX COFF */
4751 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4752 n_this_object_header_files = 1;
4753 type_vector_length = 0;
4754 type_vector = (struct type **) 0;
4756 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4757 common_block_name = NULL;
4760 /* Call after end_symtab(). */
4767 xfree (type_vector);
4770 type_vector_length = 0;
4771 previous_stab_code = 0;
4775 finish_global_stabs (struct objfile *objfile)
4779 patch_block_stabs (global_symbols, global_stabs, objfile);
4780 xfree (global_stabs);
4781 global_stabs = NULL;
4785 /* Find the end of the name, delimited by a ':', but don't match
4786 ObjC symbols which look like -[Foo bar::]:bla. */
4788 find_name_end (char *name)
4792 if (s[0] == '-' || *s == '+')
4794 /* Must be an ObjC method symbol. */
4797 error (_("invalid symbol name \"%s\""), name);
4799 s = strchr (s, ']');
4802 error (_("invalid symbol name \"%s\""), name);
4804 return strchr (s, ':');
4808 return strchr (s, ':');
4812 /* Initializer for this module. */
4815 _initialize_stabsread (void)
4817 rs6000_builtin_type_data = register_objfile_data ();
4819 undef_types_allocated = 20;
4820 undef_types_length = 0;
4821 undef_types = (struct type **)
4822 xmalloc (undef_types_allocated * sizeof (struct type *));
4824 noname_undefs_allocated = 20;
4825 noname_undefs_length = 0;
4826 noname_undefs = (struct nat *)
4827 xmalloc (noname_undefs_allocated * sizeof (struct nat));
4829 stab_register_index = register_symbol_register_impl (LOC_REGISTER,
4830 &stab_register_funcs);
4831 stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
4832 &stab_register_funcs);