1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 /* Support routines for reading and decoding debugging information in
23 the "stabs" format. This format is used with many systems that use
24 the a.out object file format, as well as some systems that use
25 COFF or ELF where the stabs data is placed in a special section.
26 Avoid placing any object file format specific code in this file. */
29 #include "gdb_string.h"
31 #include "gdb_obstack.h"
34 #include "expression.h"
37 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
39 #include "aout/aout64.h"
40 #include "gdb-stabs.h"
42 #include "complaints.h"
47 #include "cp-support.h"
48 #include "gdb_assert.h"
52 /* Ask stabsread.h to define the vars it normally declares `extern'. */
55 #include "stabsread.h" /* Our own declarations */
58 extern void _initialize_stabsread (void);
60 /* The routines that read and process a complete stabs for a C struct or
61 C++ class pass lists of data member fields and lists of member function
62 fields in an instance of a field_info structure, as defined below.
63 This is part of some reorganization of low level C++ support and is
64 expected to eventually go away... (FIXME) */
70 struct nextfield *next;
72 /* This is the raw visibility from the stab. It is not checked
73 for being one of the visibilities we recognize, so code which
74 examines this field better be able to deal. */
80 struct next_fnfieldlist
82 struct next_fnfieldlist *next;
83 struct fn_fieldlist fn_fieldlist;
89 read_one_struct_field (struct field_info *, char **, char *,
90 struct type *, struct objfile *);
92 static struct type *dbx_alloc_type (int[2], struct objfile *);
94 static long read_huge_number (char **, int, int *, int);
96 static struct type *error_type (char **, struct objfile *);
99 patch_block_stabs (struct pending *, struct pending_stabs *,
102 static void fix_common_block (struct symbol *, int);
104 static int read_type_number (char **, int *);
106 static struct type *read_type (char **, struct objfile *);
108 static struct type *read_range_type (char **, int[2], int, struct objfile *);
110 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
112 static struct type *read_sun_floating_type (char **, int[2],
115 static struct type *read_enum_type (char **, struct type *, struct objfile *);
117 static struct type *rs6000_builtin_type (int);
120 read_member_functions (struct field_info *, char **, struct type *,
124 read_struct_fields (struct field_info *, char **, struct type *,
128 read_baseclasses (struct field_info *, char **, struct type *,
132 read_tilde_fields (struct field_info *, char **, struct type *,
135 static int attach_fn_fields_to_type (struct field_info *, struct type *);
137 static int attach_fields_to_type (struct field_info *, struct type *,
140 static struct type *read_struct_type (char **, struct type *,
144 static struct type *read_array_type (char **, struct type *,
147 static struct field *read_args (char **, int, struct objfile *, int *, int *);
149 static void add_undefined_type (struct type *, int[2]);
152 read_cpp_abbrev (struct field_info *, char **, struct type *,
155 static char *find_name_end (char *name);
157 static int process_reference (char **string);
159 void stabsread_clear_cache (void);
161 static const char vptr_name[] = "_vptr$";
162 static const char vb_name[] = "_vb$";
165 invalid_cpp_abbrev_complaint (const char *arg1)
167 complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
171 reg_value_complaint (int regnum, int num_regs, const char *sym)
173 complaint (&symfile_complaints,
174 _("register number %d too large (max %d) in symbol %s"),
175 regnum, num_regs - 1, sym);
179 stabs_general_complaint (const char *arg1)
181 complaint (&symfile_complaints, "%s", arg1);
184 /* Make a list of forward references which haven't been defined. */
186 static struct type **undef_types;
187 static int undef_types_allocated;
188 static int undef_types_length;
189 static struct symbol *current_symbol = NULL;
191 /* Make a list of nameless types that are undefined.
192 This happens when another type is referenced by its number
193 before this type is actually defined. For instance "t(0,1)=k(0,2)"
194 and type (0,2) is defined only later. */
201 static struct nat *noname_undefs;
202 static int noname_undefs_allocated;
203 static int noname_undefs_length;
205 /* Check for and handle cretinous stabs symbol name continuation! */
206 #define STABS_CONTINUE(pp,objfile) \
208 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
209 *(pp) = next_symbol_text (objfile); \
213 /* Look up a dbx type-number pair. Return the address of the slot
214 where the type for that number-pair is stored.
215 The number-pair is in TYPENUMS.
217 This can be used for finding the type associated with that pair
218 or for associating a new type with the pair. */
220 static struct type **
221 dbx_lookup_type (int typenums[2])
223 int filenum = typenums[0];
224 int index = typenums[1];
227 struct header_file *f;
230 if (filenum == -1) /* -1,-1 is for temporary types. */
233 if (filenum < 0 || filenum >= n_this_object_header_files)
235 complaint (&symfile_complaints,
236 _("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d."),
237 filenum, index, symnum);
245 /* Caller wants address of address of type. We think
246 that negative (rs6k builtin) types will never appear as
247 "lvalues", (nor should they), so we stuff the real type
248 pointer into a temp, and return its address. If referenced,
249 this will do the right thing. */
250 static struct type *temp_type;
252 temp_type = rs6000_builtin_type (index);
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 (current_objfile))
285 static struct type **temp_type_p;
287 warning (_("GDB internal error: bad real_filenum"));
290 temp_type_p = &builtin_type_error;
294 f = HEADER_FILES (current_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);
330 /* If we are referring to a type not known at all yet,
331 allocate an empty type for it.
332 We will fill it in later if we find out how. */
335 *type_addr = alloc_type (objfile);
341 /* for all the stabs in a given stab vector, build appropriate types
342 and fix their symbols in given symbol vector. */
345 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
346 struct objfile *objfile)
356 /* for all the stab entries, find their corresponding symbols and
357 patch their types! */
359 for (ii = 0; ii < stabs->count; ++ii)
361 name = stabs->stab[ii];
362 pp = (char *) strchr (name, ':');
363 gdb_assert (pp); /* Must find a ':' or game's over. */
367 pp = (char *) strchr (pp, ':');
369 sym = find_symbol_in_list (symbols, name, pp - name);
372 /* FIXME-maybe: it would be nice if we noticed whether
373 the variable was defined *anywhere*, not just whether
374 it is defined in this compilation unit. But neither
375 xlc or GCC seem to need such a definition, and until
376 we do psymtabs (so that the minimal symbols from all
377 compilation units are available now), I'm not sure
378 how to get the information. */
380 /* On xcoff, if a global is defined and never referenced,
381 ld will remove it from the executable. There is then
382 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
383 sym = (struct symbol *)
384 obstack_alloc (&objfile->objfile_obstack,
385 sizeof (struct symbol));
387 memset (sym, 0, sizeof (struct symbol));
388 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
389 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
390 SYMBOL_SET_LINKAGE_NAME
391 (sym, obsavestring (name, pp - name,
392 &objfile->objfile_obstack));
394 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
396 /* I don't think the linker does this with functions,
397 so as far as I know this is never executed.
398 But it doesn't hurt to check. */
400 lookup_function_type (read_type (&pp, objfile));
404 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
406 add_symbol_to_list (sym, &global_symbols);
411 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
414 lookup_function_type (read_type (&pp, objfile));
418 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
426 /* Read a number by which a type is referred to in dbx data,
427 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
428 Just a single number N is equivalent to (0,N).
429 Return the two numbers by storing them in the vector TYPENUMS.
430 TYPENUMS will then be used as an argument to dbx_lookup_type.
432 Returns 0 for success, -1 for error. */
435 read_type_number (char **pp, int *typenums)
441 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
444 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
451 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
459 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
460 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
461 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
462 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
464 /* Structure for storing pointers to reference definitions for fast lookup
465 during "process_later". */
474 #define MAX_CHUNK_REFS 100
475 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
476 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
478 static struct ref_map *ref_map;
480 /* Ptr to free cell in chunk's linked list. */
481 static int ref_count = 0;
483 /* Number of chunks malloced. */
484 static int ref_chunk = 0;
486 /* This file maintains a cache of stabs aliases found in the symbol
487 table. If the symbol table changes, this cache must be cleared
488 or we are left holding onto data in invalid obstacks. */
490 stabsread_clear_cache (void)
496 /* Create array of pointers mapping refids to symbols and stab strings.
497 Add pointers to reference definition symbols and/or their values as we
498 find them, using their reference numbers as our index.
499 These will be used later when we resolve references. */
501 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
505 if (refnum >= ref_count)
506 ref_count = refnum + 1;
507 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
509 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
510 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
511 ref_map = (struct ref_map *)
512 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
513 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0, new_chunks * REF_CHUNK_SIZE);
514 ref_chunk += new_chunks;
516 ref_map[refnum].stabs = stabs;
517 ref_map[refnum].sym = sym;
518 ref_map[refnum].value = value;
521 /* Return defined sym for the reference REFNUM. */
523 ref_search (int refnum)
525 if (refnum < 0 || refnum > ref_count)
527 return ref_map[refnum].sym;
530 /* Parse a reference id in STRING and return the resulting
531 reference number. Move STRING beyond the reference id. */
534 process_reference (char **string)
542 /* Advance beyond the initial '#'. */
545 /* Read number as reference id. */
546 while (*p && isdigit (*p))
548 refnum = refnum * 10 + *p - '0';
555 /* If STRING defines a reference, store away a pointer to the reference
556 definition for later use. Return the reference number. */
559 symbol_reference_defined (char **string)
564 refnum = process_reference (&p);
566 /* Defining symbols end in '=' */
569 /* Symbol is being defined here. */
575 /* Must be a reference. Either the symbol has already been defined,
576 or this is a forward reference to it. */
583 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
584 struct objfile *objfile)
586 struct gdbarch *gdbarch = get_objfile_arch (objfile);
588 char *p = (char *) find_name_end (string);
593 /* We would like to eliminate nameless symbols, but keep their types.
594 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
595 to type 2, but, should not create a symbol to address that type. Since
596 the symbol will be nameless, there is no way any user can refer to it. */
600 /* Ignore syms with empty names. */
604 /* Ignore old-style symbols from cc -go */
614 /* If a nameless stab entry, all we need is the type, not the symbol.
615 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
616 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
618 current_symbol = sym = (struct symbol *)
619 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
620 memset (sym, 0, sizeof (struct symbol));
622 switch (type & N_TYPE)
625 SYMBOL_SECTION (sym) = SECT_OFF_TEXT (objfile);
628 SYMBOL_SECTION (sym) = SECT_OFF_DATA (objfile);
631 SYMBOL_SECTION (sym) = SECT_OFF_BSS (objfile);
635 if (processing_gcc_compilation)
637 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
638 number of bytes occupied by a type or object, which we ignore. */
639 SYMBOL_LINE (sym) = desc;
643 SYMBOL_LINE (sym) = 0; /* unknown */
646 if (is_cplus_marker (string[0]))
648 /* Special GNU C++ names. */
652 SYMBOL_SET_LINKAGE_NAME
653 (sym, obsavestring ("this", strlen ("this"),
654 &objfile->objfile_obstack));
657 case 'v': /* $vtbl_ptr_type */
661 SYMBOL_SET_LINKAGE_NAME
662 (sym, obsavestring ("eh_throw", strlen ("eh_throw"),
663 &objfile->objfile_obstack));
667 /* This was an anonymous type that was never fixed up. */
671 /* SunPRO (3.0 at least) static variable encoding. */
672 if (gdbarch_static_transform_name_p (gdbarch))
674 /* ... fall through ... */
677 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
679 goto normal; /* Do *something* with it */
685 SYMBOL_LANGUAGE (sym) = current_subfile->language;
686 SYMBOL_SET_NAMES (sym, string, p - string, objfile);
690 /* Determine the type of name being defined. */
692 /* Getting GDB to correctly skip the symbol on an undefined symbol
693 descriptor and not ever dump core is a very dodgy proposition if
694 we do things this way. I say the acorn RISC machine can just
695 fix their compiler. */
696 /* The Acorn RISC machine's compiler can put out locals that don't
697 start with "234=" or "(3,4)=", so assume anything other than the
698 deftypes we know how to handle is a local. */
699 if (!strchr ("cfFGpPrStTvVXCR", *p))
701 if (isdigit (*p) || *p == '(' || *p == '-')
710 /* c is a special case, not followed by a type-number.
711 SYMBOL:c=iVALUE for an integer constant symbol.
712 SYMBOL:c=rVALUE for a floating constant symbol.
713 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
714 e.g. "b:c=e6,0" for "const b = blob1"
715 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
718 SYMBOL_CLASS (sym) = LOC_CONST;
719 SYMBOL_TYPE (sym) = error_type (&p, objfile);
720 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
721 add_symbol_to_list (sym, &file_symbols);
731 struct type *dbl_type;
733 /* FIXME-if-picky-about-floating-accuracy: Should be using
734 target arithmetic to get the value. real.c in GCC
735 probably has the necessary code. */
737 dbl_type = builtin_type (gdbarch)->builtin_double;
739 obstack_alloc (&objfile->objfile_obstack,
740 TYPE_LENGTH (dbl_type));
741 store_typed_floating (dbl_valu, dbl_type, d);
743 SYMBOL_TYPE (sym) = dbl_type;
744 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
745 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
750 /* Defining integer constants this way is kind of silly,
751 since 'e' constants allows the compiler to give not
752 only the value, but the type as well. C has at least
753 int, long, unsigned int, and long long as constant
754 types; other languages probably should have at least
755 unsigned as well as signed constants. */
757 SYMBOL_TYPE (sym) = builtin_type (gdbarch)->builtin_long;
758 SYMBOL_VALUE (sym) = atoi (p);
759 SYMBOL_CLASS (sym) = LOC_CONST;
763 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
764 can be represented as integral.
765 e.g. "b:c=e6,0" for "const b = blob1"
766 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
768 SYMBOL_CLASS (sym) = LOC_CONST;
769 SYMBOL_TYPE (sym) = read_type (&p, objfile);
773 SYMBOL_TYPE (sym) = error_type (&p, objfile);
778 /* If the value is too big to fit in an int (perhaps because
779 it is unsigned), or something like that, we silently get
780 a bogus value. The type and everything else about it is
781 correct. Ideally, we should be using whatever we have
782 available for parsing unsigned and long long values,
784 SYMBOL_VALUE (sym) = atoi (p);
789 SYMBOL_CLASS (sym) = LOC_CONST;
790 SYMBOL_TYPE (sym) = error_type (&p, objfile);
793 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
794 add_symbol_to_list (sym, &file_symbols);
798 /* The name of a caught exception. */
799 SYMBOL_TYPE (sym) = read_type (&p, objfile);
800 SYMBOL_CLASS (sym) = LOC_LABEL;
801 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
802 SYMBOL_VALUE_ADDRESS (sym) = valu;
803 add_symbol_to_list (sym, &local_symbols);
807 /* A static function definition. */
808 SYMBOL_TYPE (sym) = read_type (&p, objfile);
809 SYMBOL_CLASS (sym) = LOC_BLOCK;
810 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
811 add_symbol_to_list (sym, &file_symbols);
812 /* fall into process_function_types. */
814 process_function_types:
815 /* Function result types are described as the result type in stabs.
816 We need to convert this to the function-returning-type-X type
817 in GDB. E.g. "int" is converted to "function returning int". */
818 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
819 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
821 /* All functions in C++ have prototypes. Stabs does not offer an
822 explicit way to identify prototyped or unprototyped functions,
823 but both GCC and Sun CC emit stabs for the "call-as" type rather
824 than the "declared-as" type for unprototyped functions, so
825 we treat all functions as if they were prototyped. This is used
826 primarily for promotion when calling the function from GDB. */
827 TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED;
829 /* fall into process_prototype_types */
831 process_prototype_types:
832 /* Sun acc puts declared types of arguments here. */
835 struct type *ftype = SYMBOL_TYPE (sym);
840 /* Obtain a worst case guess for the number of arguments
841 by counting the semicolons. */
848 /* Allocate parameter information fields and fill them in. */
849 TYPE_FIELDS (ftype) = (struct field *)
850 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
855 /* A type number of zero indicates the start of varargs.
856 FIXME: GDB currently ignores vararg functions. */
857 if (p[0] == '0' && p[1] == '\0')
859 ptype = read_type (&p, objfile);
861 /* The Sun compilers mark integer arguments, which should
862 be promoted to the width of the calling conventions, with
863 a type which references itself. This type is turned into
864 a TYPE_CODE_VOID type by read_type, and we have to turn
865 it back into builtin_int here.
866 FIXME: Do we need a new builtin_promoted_int_arg ? */
867 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
868 ptype = builtin_type (gdbarch)->builtin_int;
869 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
870 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
872 TYPE_NFIELDS (ftype) = nparams;
873 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
878 /* A global function definition. */
879 SYMBOL_TYPE (sym) = read_type (&p, objfile);
880 SYMBOL_CLASS (sym) = LOC_BLOCK;
881 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
882 add_symbol_to_list (sym, &global_symbols);
883 goto process_function_types;
886 /* For a class G (global) symbol, it appears that the
887 value is not correct. It is necessary to search for the
888 corresponding linker definition to find the value.
889 These definitions appear at the end of the namelist. */
890 SYMBOL_TYPE (sym) = read_type (&p, objfile);
891 SYMBOL_CLASS (sym) = LOC_STATIC;
892 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
893 /* Don't add symbol references to global_sym_chain.
894 Symbol references don't have valid names and wont't match up with
895 minimal symbols when the global_sym_chain is relocated.
896 We'll fixup symbol references when we fixup the defining symbol. */
897 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
899 i = hashname (SYMBOL_LINKAGE_NAME (sym));
900 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
901 global_sym_chain[i] = sym;
903 add_symbol_to_list (sym, &global_symbols);
906 /* This case is faked by a conditional above,
907 when there is no code letter in the dbx data.
908 Dbx data never actually contains 'l'. */
911 SYMBOL_TYPE (sym) = read_type (&p, objfile);
912 SYMBOL_CLASS (sym) = LOC_LOCAL;
913 SYMBOL_VALUE (sym) = valu;
914 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
915 add_symbol_to_list (sym, &local_symbols);
920 /* pF is a two-letter code that means a function parameter in Fortran.
921 The type-number specifies the type of the return value.
922 Translate it into a pointer-to-function type. */
926 = lookup_pointer_type
927 (lookup_function_type (read_type (&p, objfile)));
930 SYMBOL_TYPE (sym) = read_type (&p, objfile);
932 SYMBOL_CLASS (sym) = LOC_ARG;
933 SYMBOL_VALUE (sym) = valu;
934 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
935 SYMBOL_IS_ARGUMENT (sym) = 1;
936 add_symbol_to_list (sym, &local_symbols);
938 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
940 /* On little-endian machines, this crud is never necessary,
941 and, if the extra bytes contain garbage, is harmful. */
945 /* If it's gcc-compiled, if it says `short', believe it. */
946 if (processing_gcc_compilation
947 || gdbarch_believe_pcc_promotion (gdbarch))
950 if (!gdbarch_believe_pcc_promotion (gdbarch))
952 /* If PCC says a parameter is a short or a char, it is
954 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
955 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
956 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
959 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
960 ? builtin_type (gdbarch)->builtin_unsigned_int
961 : builtin_type (gdbarch)->builtin_int;
967 /* acc seems to use P to declare the prototypes of functions that
968 are referenced by this file. gdb is not prepared to deal
969 with this extra information. FIXME, it ought to. */
972 SYMBOL_TYPE (sym) = read_type (&p, objfile);
973 goto process_prototype_types;
978 /* Parameter which is in a register. */
979 SYMBOL_TYPE (sym) = read_type (&p, objfile);
980 SYMBOL_CLASS (sym) = LOC_REGISTER;
981 SYMBOL_IS_ARGUMENT (sym) = 1;
982 SYMBOL_VALUE (sym) = gdbarch_stab_reg_to_regnum (current_gdbarch, valu);
983 if (SYMBOL_VALUE (sym) >= gdbarch_num_regs (current_gdbarch)
984 + gdbarch_num_pseudo_regs (current_gdbarch))
986 reg_value_complaint (SYMBOL_VALUE (sym),
987 gdbarch_num_regs (current_gdbarch)
988 + gdbarch_num_pseudo_regs (current_gdbarch),
989 SYMBOL_PRINT_NAME (sym));
990 SYMBOL_VALUE (sym) = gdbarch_sp_regnum (current_gdbarch);
991 /* Known safe, though useless */
993 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
994 add_symbol_to_list (sym, &local_symbols);
998 /* Register variable (either global or local). */
999 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1000 SYMBOL_CLASS (sym) = LOC_REGISTER;
1001 SYMBOL_VALUE (sym) = gdbarch_stab_reg_to_regnum (current_gdbarch, valu);
1002 if (SYMBOL_VALUE (sym) >= gdbarch_num_regs (current_gdbarch)
1003 + gdbarch_num_pseudo_regs (current_gdbarch))
1005 reg_value_complaint (SYMBOL_VALUE (sym),
1006 gdbarch_num_regs (current_gdbarch)
1007 + gdbarch_num_pseudo_regs (current_gdbarch),
1008 SYMBOL_PRINT_NAME (sym));
1009 SYMBOL_VALUE (sym) = gdbarch_sp_regnum (current_gdbarch);
1010 /* Known safe, though useless */
1012 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1013 if (within_function)
1015 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1016 the same name to represent an argument passed in a
1017 register. GCC uses 'P' for the same case. So if we find
1018 such a symbol pair we combine it into one 'P' symbol.
1019 For Sun cc we need to do this regardless of
1020 stabs_argument_has_addr, because the compiler puts out
1021 the 'p' symbol even if it never saves the argument onto
1024 On most machines, we want to preserve both symbols, so
1025 that we can still get information about what is going on
1026 with the stack (VAX for computing args_printed, using
1027 stack slots instead of saved registers in backtraces,
1030 Note that this code illegally combines
1031 main(argc) struct foo argc; { register struct foo argc; }
1032 but this case is considered pathological and causes a warning
1033 from a decent compiler. */
1036 && local_symbols->nsyms > 0
1037 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1039 struct symbol *prev_sym;
1040 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1041 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1042 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1043 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1044 SYMBOL_LINKAGE_NAME (sym)) == 0)
1046 SYMBOL_CLASS (prev_sym) = LOC_REGISTER;
1047 /* Use the type from the LOC_REGISTER; that is the type
1048 that is actually in that register. */
1049 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1050 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1055 add_symbol_to_list (sym, &local_symbols);
1058 add_symbol_to_list (sym, &file_symbols);
1062 /* Static symbol at top level of file */
1063 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1064 SYMBOL_CLASS (sym) = LOC_STATIC;
1065 SYMBOL_VALUE_ADDRESS (sym) = valu;
1066 if (gdbarch_static_transform_name_p (gdbarch)
1067 && gdbarch_static_transform_name (gdbarch,
1068 SYMBOL_LINKAGE_NAME (sym))
1069 != SYMBOL_LINKAGE_NAME (sym))
1071 struct minimal_symbol *msym;
1072 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, objfile);
1075 char *new_name = gdbarch_static_transform_name
1076 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1077 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1078 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1081 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1082 add_symbol_to_list (sym, &file_symbols);
1086 /* In Ada, there is no distinction between typedef and non-typedef;
1087 any type declaration implicitly has the equivalent of a typedef,
1088 and thus 't' is in fact equivalent to 'Tt'.
1090 Therefore, for Ada units, we check the character immediately
1091 before the 't', and if we do not find a 'T', then make sure to
1092 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1093 will be stored in the VAR_DOMAIN). If the symbol was indeed
1094 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1095 elsewhere, so we don't need to take care of that.
1097 This is important to do, because of forward references:
1098 The cleanup of undefined types stored in undef_types only uses
1099 STRUCT_DOMAIN symbols to perform the replacement. */
1100 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1103 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1105 /* For a nameless type, we don't want a create a symbol, thus we
1106 did not use `sym'. Return without further processing. */
1110 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1111 SYMBOL_VALUE (sym) = valu;
1112 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1113 /* C++ vagaries: we may have a type which is derived from
1114 a base type which did not have its name defined when the
1115 derived class was output. We fill in the derived class's
1116 base part member's name here in that case. */
1117 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1118 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1119 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1120 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1123 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1124 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1125 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1126 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1129 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1131 /* gcc-2.6 or later (when using -fvtable-thunks)
1132 emits a unique named type for a vtable entry.
1133 Some gdb code depends on that specific name. */
1134 extern const char vtbl_ptr_name[];
1136 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1137 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1138 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1140 /* If we are giving a name to a type such as "pointer to
1141 foo" or "function returning foo", we better not set
1142 the TYPE_NAME. If the program contains "typedef char
1143 *caddr_t;", we don't want all variables of type char
1144 * to print as caddr_t. This is not just a
1145 consequence of GDB's type management; PCC and GCC (at
1146 least through version 2.4) both output variables of
1147 either type char * or caddr_t with the type number
1148 defined in the 't' symbol for caddr_t. If a future
1149 compiler cleans this up it GDB is not ready for it
1150 yet, but if it becomes ready we somehow need to
1151 disable this check (without breaking the PCC/GCC2.4
1156 Fortunately, this check seems not to be necessary
1157 for anything except pointers or functions. */
1158 /* ezannoni: 2000-10-26. This seems to apply for
1159 versions of gcc older than 2.8. This was the original
1160 problem: with the following code gdb would tell that
1161 the type for name1 is caddr_t, and func is char()
1162 typedef char *caddr_t;
1174 /* Pascal accepts names for pointer types. */
1175 if (current_subfile->language == language_pascal)
1177 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1181 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1184 add_symbol_to_list (sym, &file_symbols);
1188 /* Create the STRUCT_DOMAIN clone. */
1189 struct symbol *struct_sym = (struct symbol *)
1190 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
1193 SYMBOL_CLASS (struct_sym) = LOC_TYPEDEF;
1194 SYMBOL_VALUE (struct_sym) = valu;
1195 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1196 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1197 TYPE_NAME (SYMBOL_TYPE (sym))
1198 = obconcat (&objfile->objfile_obstack, "", "",
1199 SYMBOL_LINKAGE_NAME (sym));
1200 add_symbol_to_list (struct_sym, &file_symbols);
1206 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1207 by 't' which means we are typedef'ing it as well. */
1208 synonym = *p == 't';
1213 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1215 /* For a nameless type, we don't want a create a symbol, thus we
1216 did not use `sym'. Return without further processing. */
1220 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1221 SYMBOL_VALUE (sym) = valu;
1222 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1223 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1224 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1225 = obconcat (&objfile->objfile_obstack, "", "",
1226 SYMBOL_LINKAGE_NAME (sym));
1227 add_symbol_to_list (sym, &file_symbols);
1231 /* Clone the sym and then modify it. */
1232 struct symbol *typedef_sym = (struct symbol *)
1233 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
1234 *typedef_sym = *sym;
1235 SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF;
1236 SYMBOL_VALUE (typedef_sym) = valu;
1237 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1238 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1239 TYPE_NAME (SYMBOL_TYPE (sym))
1240 = obconcat (&objfile->objfile_obstack, "", "",
1241 SYMBOL_LINKAGE_NAME (sym));
1242 add_symbol_to_list (typedef_sym, &file_symbols);
1247 /* Static symbol of local scope */
1248 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1249 SYMBOL_CLASS (sym) = LOC_STATIC;
1250 SYMBOL_VALUE_ADDRESS (sym) = valu;
1251 if (gdbarch_static_transform_name_p (gdbarch)
1252 && gdbarch_static_transform_name (gdbarch,
1253 SYMBOL_LINKAGE_NAME (sym))
1254 != SYMBOL_LINKAGE_NAME (sym))
1256 struct minimal_symbol *msym;
1257 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, objfile);
1260 char *new_name = gdbarch_static_transform_name
1261 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1262 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1263 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1266 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1267 add_symbol_to_list (sym, &local_symbols);
1271 /* Reference parameter */
1272 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1273 SYMBOL_CLASS (sym) = LOC_REF_ARG;
1274 SYMBOL_IS_ARGUMENT (sym) = 1;
1275 SYMBOL_VALUE (sym) = valu;
1276 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1277 add_symbol_to_list (sym, &local_symbols);
1281 /* Reference parameter which is in a register. */
1282 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1283 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
1284 SYMBOL_IS_ARGUMENT (sym) = 1;
1285 SYMBOL_VALUE (sym) = gdbarch_stab_reg_to_regnum (current_gdbarch, valu);
1286 if (SYMBOL_VALUE (sym) >= gdbarch_num_regs (current_gdbarch)
1287 + gdbarch_num_pseudo_regs (current_gdbarch))
1289 reg_value_complaint (SYMBOL_VALUE (sym),
1290 gdbarch_num_regs (current_gdbarch)
1291 + gdbarch_num_pseudo_regs (current_gdbarch),
1292 SYMBOL_PRINT_NAME (sym));
1293 SYMBOL_VALUE (sym) = gdbarch_sp_regnum (current_gdbarch);
1294 /* Known safe, though useless */
1296 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1297 add_symbol_to_list (sym, &local_symbols);
1301 /* This is used by Sun FORTRAN for "function result value".
1302 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1303 that Pascal uses it too, but when I tried it Pascal used
1304 "x:3" (local symbol) instead. */
1305 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1306 SYMBOL_CLASS (sym) = LOC_LOCAL;
1307 SYMBOL_VALUE (sym) = valu;
1308 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1309 add_symbol_to_list (sym, &local_symbols);
1313 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1314 SYMBOL_CLASS (sym) = LOC_CONST;
1315 SYMBOL_VALUE (sym) = 0;
1316 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1317 add_symbol_to_list (sym, &file_symbols);
1321 /* Some systems pass variables of certain types by reference instead
1322 of by value, i.e. they will pass the address of a structure (in a
1323 register or on the stack) instead of the structure itself. */
1325 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1326 && SYMBOL_IS_ARGUMENT (sym))
1328 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1329 variables passed in a register). */
1330 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1331 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
1332 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1333 and subsequent arguments on SPARC, for example). */
1334 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1335 SYMBOL_CLASS (sym) = LOC_REF_ARG;
1341 /* Skip rest of this symbol and return an error type.
1343 General notes on error recovery: error_type always skips to the
1344 end of the symbol (modulo cretinous dbx symbol name continuation).
1345 Thus code like this:
1347 if (*(*pp)++ != ';')
1348 return error_type (pp, objfile);
1350 is wrong because if *pp starts out pointing at '\0' (typically as the
1351 result of an earlier error), it will be incremented to point to the
1352 start of the next symbol, which might produce strange results, at least
1353 if you run off the end of the string table. Instead use
1356 return error_type (pp, objfile);
1362 foo = error_type (pp, objfile);
1366 And in case it isn't obvious, the point of all this hair is so the compiler
1367 can define new types and new syntaxes, and old versions of the
1368 debugger will be able to read the new symbol tables. */
1370 static struct type *
1371 error_type (char **pp, struct objfile *objfile)
1373 complaint (&symfile_complaints, _("couldn't parse type; debugger out of date?"));
1376 /* Skip to end of symbol. */
1377 while (**pp != '\0')
1382 /* Check for and handle cretinous dbx symbol name continuation! */
1383 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1385 *pp = next_symbol_text (objfile);
1392 return (builtin_type_error);
1396 /* Read type information or a type definition; return the type. Even
1397 though this routine accepts either type information or a type
1398 definition, the distinction is relevant--some parts of stabsread.c
1399 assume that type information starts with a digit, '-', or '(' in
1400 deciding whether to call read_type. */
1402 static struct type *
1403 read_type (char **pp, struct objfile *objfile)
1405 struct type *type = 0;
1408 char type_descriptor;
1410 /* Size in bits of type if specified by a type attribute, or -1 if
1411 there is no size attribute. */
1414 /* Used to distinguish string and bitstring from char-array and set. */
1417 /* Used to distinguish vector from array. */
1420 /* Read type number if present. The type number may be omitted.
1421 for instance in a two-dimensional array declared with type
1422 "ar1;1;10;ar1;1;10;4". */
1423 if ((**pp >= '0' && **pp <= '9')
1427 if (read_type_number (pp, typenums) != 0)
1428 return error_type (pp, objfile);
1432 /* Type is not being defined here. Either it already
1433 exists, or this is a forward reference to it.
1434 dbx_alloc_type handles both cases. */
1435 type = dbx_alloc_type (typenums, objfile);
1437 /* If this is a forward reference, arrange to complain if it
1438 doesn't get patched up by the time we're done
1440 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1441 add_undefined_type (type, typenums);
1446 /* Type is being defined here. */
1448 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1453 /* 'typenums=' not present, type is anonymous. Read and return
1454 the definition, but don't put it in the type vector. */
1455 typenums[0] = typenums[1] = -1;
1460 type_descriptor = (*pp)[-1];
1461 switch (type_descriptor)
1465 enum type_code code;
1467 /* Used to index through file_symbols. */
1468 struct pending *ppt;
1471 /* Name including "struct", etc. */
1475 char *from, *to, *p, *q1, *q2;
1477 /* Set the type code according to the following letter. */
1481 code = TYPE_CODE_STRUCT;
1484 code = TYPE_CODE_UNION;
1487 code = TYPE_CODE_ENUM;
1491 /* Complain and keep going, so compilers can invent new
1492 cross-reference types. */
1493 complaint (&symfile_complaints,
1494 _("Unrecognized cross-reference type `%c'"), (*pp)[0]);
1495 code = TYPE_CODE_STRUCT;
1500 q1 = strchr (*pp, '<');
1501 p = strchr (*pp, ':');
1503 return error_type (pp, objfile);
1504 if (q1 && p > q1 && p[1] == ':')
1506 int nesting_level = 0;
1507 for (q2 = q1; *q2; q2++)
1511 else if (*q2 == '>')
1513 else if (*q2 == ':' && nesting_level == 0)
1518 return error_type (pp, objfile);
1521 (char *) obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1523 /* Copy the name. */
1529 /* Set the pointer ahead of the name which we just read, and
1534 /* If this type has already been declared, then reuse the same
1535 type, rather than allocating a new one. This saves some
1538 for (ppt = file_symbols; ppt; ppt = ppt->next)
1539 for (i = 0; i < ppt->nsyms; i++)
1541 struct symbol *sym = ppt->symbol[i];
1543 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1544 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1545 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1546 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1548 obstack_free (&objfile->objfile_obstack, type_name);
1549 type = SYMBOL_TYPE (sym);
1550 if (typenums[0] != -1)
1551 *dbx_lookup_type (typenums) = type;
1556 /* Didn't find the type to which this refers, so we must
1557 be dealing with a forward reference. Allocate a type
1558 structure for it, and keep track of it so we can
1559 fill in the rest of the fields when we get the full
1561 type = dbx_alloc_type (typenums, objfile);
1562 TYPE_CODE (type) = code;
1563 TYPE_TAG_NAME (type) = type_name;
1564 INIT_CPLUS_SPECIFIC (type);
1565 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
1567 add_undefined_type (type, typenums);
1571 case '-': /* RS/6000 built-in type */
1585 /* We deal with something like t(1,2)=(3,4)=... which
1586 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1588 /* Allocate and enter the typedef type first.
1589 This handles recursive types. */
1590 type = dbx_alloc_type (typenums, objfile);
1591 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1593 struct type *xtype = read_type (pp, objfile);
1596 /* It's being defined as itself. That means it is "void". */
1597 TYPE_CODE (type) = TYPE_CODE_VOID;
1598 TYPE_LENGTH (type) = 1;
1600 else if (type_size >= 0 || is_string)
1602 /* This is the absolute wrong way to construct types. Every
1603 other debug format has found a way around this problem and
1604 the related problems with unnecessarily stubbed types;
1605 someone motivated should attempt to clean up the issue
1606 here as well. Once a type pointed to has been created it
1607 should not be modified.
1609 Well, it's not *absolutely* wrong. Constructing recursive
1610 types (trees, linked lists) necessarily entails modifying
1611 types after creating them. Constructing any loop structure
1612 entails side effects. The Dwarf 2 reader does handle this
1613 more gracefully (it never constructs more than once
1614 instance of a type object, so it doesn't have to copy type
1615 objects wholesale), but it still mutates type objects after
1616 other folks have references to them.
1618 Keep in mind that this circularity/mutation issue shows up
1619 at the source language level, too: C's "incomplete types",
1620 for example. So the proper cleanup, I think, would be to
1621 limit GDB's type smashing to match exactly those required
1622 by the source language. So GDB could have a
1623 "complete_this_type" function, but never create unnecessary
1624 copies of a type otherwise. */
1625 replace_type (type, xtype);
1626 TYPE_NAME (type) = NULL;
1627 TYPE_TAG_NAME (type) = NULL;
1631 TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
1632 TYPE_TARGET_TYPE (type) = xtype;
1637 /* In the following types, we must be sure to overwrite any existing
1638 type that the typenums refer to, rather than allocating a new one
1639 and making the typenums point to the new one. This is because there
1640 may already be pointers to the existing type (if it had been
1641 forward-referenced), and we must change it to a pointer, function,
1642 reference, or whatever, *in-place*. */
1644 case '*': /* Pointer to another type */
1645 type1 = read_type (pp, objfile);
1646 type = make_pointer_type (type1, dbx_lookup_type (typenums));
1649 case '&': /* Reference to another type */
1650 type1 = read_type (pp, objfile);
1651 type = make_reference_type (type1, dbx_lookup_type (typenums));
1654 case 'f': /* Function returning another type */
1655 type1 = read_type (pp, objfile);
1656 type = make_function_type (type1, dbx_lookup_type (typenums));
1659 case 'g': /* Prototyped function. (Sun) */
1661 /* Unresolved questions:
1663 - According to Sun's ``STABS Interface Manual'', for 'f'
1664 and 'F' symbol descriptors, a `0' in the argument type list
1665 indicates a varargs function. But it doesn't say how 'g'
1666 type descriptors represent that info. Someone with access
1667 to Sun's toolchain should try it out.
1669 - According to the comment in define_symbol (search for
1670 `process_prototype_types:'), Sun emits integer arguments as
1671 types which ref themselves --- like `void' types. Do we
1672 have to deal with that here, too? Again, someone with
1673 access to Sun's toolchain should try it out and let us
1676 const char *type_start = (*pp) - 1;
1677 struct type *return_type = read_type (pp, objfile);
1678 struct type *func_type
1679 = make_function_type (return_type, dbx_lookup_type (typenums));
1682 struct type_list *next;
1686 while (**pp && **pp != '#')
1688 struct type *arg_type = read_type (pp, objfile);
1689 struct type_list *new = alloca (sizeof (*new));
1690 new->type = arg_type;
1691 new->next = arg_types;
1699 complaint (&symfile_complaints,
1700 _("Prototyped function type didn't end arguments with `#':\n%s"),
1704 /* If there is just one argument whose type is `void', then
1705 that's just an empty argument list. */
1707 && ! arg_types->next
1708 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1711 TYPE_FIELDS (func_type)
1712 = (struct field *) TYPE_ALLOC (func_type,
1713 num_args * sizeof (struct field));
1714 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1717 struct type_list *t;
1719 /* We stuck each argument type onto the front of the list
1720 when we read it, so the list is reversed. Build the
1721 fields array right-to-left. */
1722 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1723 TYPE_FIELD_TYPE (func_type, i) = t->type;
1725 TYPE_NFIELDS (func_type) = num_args;
1726 TYPE_FLAGS (func_type) |= TYPE_FLAG_PROTOTYPED;
1732 case 'k': /* Const qualifier on some type (Sun) */
1733 type = read_type (pp, objfile);
1734 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1735 dbx_lookup_type (typenums));
1738 case 'B': /* Volatile qual on some type (Sun) */
1739 type = read_type (pp, objfile);
1740 type = make_cv_type (TYPE_CONST (type), 1, type,
1741 dbx_lookup_type (typenums));
1745 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1746 { /* Member (class & variable) type */
1747 /* FIXME -- we should be doing smash_to_XXX types here. */
1749 struct type *domain = read_type (pp, objfile);
1750 struct type *memtype;
1753 /* Invalid member type data format. */
1754 return error_type (pp, objfile);
1757 memtype = read_type (pp, objfile);
1758 type = dbx_alloc_type (typenums, objfile);
1759 smash_to_memberptr_type (type, domain, memtype);
1762 /* type attribute */
1765 /* Skip to the semicolon. */
1766 while (**pp != ';' && **pp != '\0')
1769 return error_type (pp, objfile);
1771 ++ * pp; /* Skip the semicolon. */
1775 case 's': /* Size attribute */
1776 type_size = atoi (attr + 1);
1781 case 'S': /* String attribute */
1782 /* FIXME: check to see if following type is array? */
1786 case 'V': /* Vector attribute */
1787 /* FIXME: check to see if following type is array? */
1792 /* Ignore unrecognized type attributes, so future compilers
1793 can invent new ones. */
1801 case '#': /* Method (class & fn) type */
1802 if ((*pp)[0] == '#')
1804 /* We'll get the parameter types from the name. */
1805 struct type *return_type;
1808 return_type = read_type (pp, objfile);
1809 if (*(*pp)++ != ';')
1810 complaint (&symfile_complaints,
1811 _("invalid (minimal) member type data format at symtab pos %d."),
1813 type = allocate_stub_method (return_type);
1814 if (typenums[0] != -1)
1815 *dbx_lookup_type (typenums) = type;
1819 struct type *domain = read_type (pp, objfile);
1820 struct type *return_type;
1825 /* Invalid member type data format. */
1826 return error_type (pp, objfile);
1830 return_type = read_type (pp, objfile);
1831 args = read_args (pp, ';', objfile, &nargs, &varargs);
1833 return error_type (pp, objfile);
1834 type = dbx_alloc_type (typenums, objfile);
1835 smash_to_method_type (type, domain, return_type, args,
1840 case 'r': /* Range type */
1841 type = read_range_type (pp, typenums, type_size, objfile);
1842 if (typenums[0] != -1)
1843 *dbx_lookup_type (typenums) = type;
1848 /* Sun ACC builtin int type */
1849 type = read_sun_builtin_type (pp, typenums, objfile);
1850 if (typenums[0] != -1)
1851 *dbx_lookup_type (typenums) = type;
1855 case 'R': /* Sun ACC builtin float type */
1856 type = read_sun_floating_type (pp, typenums, objfile);
1857 if (typenums[0] != -1)
1858 *dbx_lookup_type (typenums) = type;
1861 case 'e': /* Enumeration type */
1862 type = dbx_alloc_type (typenums, objfile);
1863 type = read_enum_type (pp, type, objfile);
1864 if (typenums[0] != -1)
1865 *dbx_lookup_type (typenums) = type;
1868 case 's': /* Struct type */
1869 case 'u': /* Union type */
1871 enum type_code type_code = TYPE_CODE_UNDEF;
1872 type = dbx_alloc_type (typenums, objfile);
1873 switch (type_descriptor)
1876 type_code = TYPE_CODE_STRUCT;
1879 type_code = TYPE_CODE_UNION;
1882 type = read_struct_type (pp, type, type_code, objfile);
1886 case 'a': /* Array type */
1888 return error_type (pp, objfile);
1891 type = dbx_alloc_type (typenums, objfile);
1892 type = read_array_type (pp, type, objfile);
1894 TYPE_CODE (type) = TYPE_CODE_STRING;
1896 make_vector_type (type);
1899 case 'S': /* Set or bitstring type */
1900 type1 = read_type (pp, objfile);
1901 type = create_set_type ((struct type *) NULL, type1);
1903 TYPE_CODE (type) = TYPE_CODE_BITSTRING;
1904 if (typenums[0] != -1)
1905 *dbx_lookup_type (typenums) = type;
1909 --*pp; /* Go back to the symbol in error */
1910 /* Particularly important if it was \0! */
1911 return error_type (pp, objfile);
1916 warning (_("GDB internal error, type is NULL in stabsread.c."));
1917 return error_type (pp, objfile);
1920 /* Size specified in a type attribute overrides any other size. */
1921 if (type_size != -1)
1922 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
1927 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1928 Return the proper type node for a given builtin type number. */
1930 static struct type *
1931 rs6000_builtin_type (int typenum)
1933 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1934 #define NUMBER_RECOGNIZED 34
1935 /* This includes an empty slot for type number -0. */
1936 static struct type *negative_types[NUMBER_RECOGNIZED + 1];
1937 struct type *rettype = NULL;
1939 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
1941 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
1942 return builtin_type_error;
1944 if (negative_types[-typenum] != NULL)
1945 return negative_types[-typenum];
1947 #if TARGET_CHAR_BIT != 8
1948 #error This code wrong for TARGET_CHAR_BIT not 8
1949 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1950 that if that ever becomes not true, the correct fix will be to
1951 make the size in the struct type to be in bits, not in units of
1958 /* The size of this and all the other types are fixed, defined
1959 by the debugging format. If there is a type called "int" which
1960 is other than 32 bits, then it should use a new negative type
1961 number (or avoid negative type numbers for that case).
1962 See stabs.texinfo. */
1963 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
1966 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", NULL);
1969 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
1972 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", NULL);
1975 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
1976 "unsigned char", NULL);
1979 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", NULL);
1982 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
1983 "unsigned short", NULL);
1986 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
1987 "unsigned int", NULL);
1990 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
1993 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
1994 "unsigned long", NULL);
1997 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
2000 /* IEEE single precision (32 bit). */
2001 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
2004 /* IEEE double precision (64 bit). */
2005 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
2008 /* This is an IEEE double on the RS/6000, and different machines with
2009 different sizes for "long double" should use different negative
2010 type numbers. See stabs.texinfo. */
2011 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", NULL);
2014 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", NULL);
2017 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2021 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", NULL);
2024 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", NULL);
2027 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", NULL);
2030 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2034 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2038 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2042 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2046 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2050 /* Complex type consisting of two IEEE single precision values. */
2051 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", NULL);
2052 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2056 /* Complex type consisting of two IEEE double precision values. */
2057 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2058 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2062 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", NULL);
2065 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", NULL);
2068 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", NULL);
2071 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", NULL);
2074 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", NULL);
2077 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2078 "unsigned long long", NULL);
2081 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2085 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", NULL);
2088 negative_types[-typenum] = rettype;
2092 /* This page contains subroutines of read_type. */
2094 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2097 update_method_name_from_physname (char **old_name, char *physname)
2101 method_name = method_name_from_physname (physname);
2103 if (method_name == NULL)
2105 complaint (&symfile_complaints,
2106 _("Method has bad physname %s\n"), physname);
2110 if (strcmp (*old_name, method_name) != 0)
2113 *old_name = method_name;
2116 xfree (method_name);
2119 /* Read member function stabs info for C++ classes. The form of each member
2122 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2124 An example with two member functions is:
2126 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2128 For the case of overloaded operators, the format is op$::*.funcs, where
2129 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2130 name (such as `+=') and `.' marks the end of the operator name.
2132 Returns 1 for success, 0 for failure. */
2135 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2136 struct objfile *objfile)
2140 /* Total number of member functions defined in this class. If the class
2141 defines two `f' functions, and one `g' function, then this will have
2143 int total_length = 0;
2147 struct next_fnfield *next;
2148 struct fn_field fn_field;
2151 struct type *look_ahead_type;
2152 struct next_fnfieldlist *new_fnlist;
2153 struct next_fnfield *new_sublist;
2157 /* Process each list until we find something that is not a member function
2158 or find the end of the functions. */
2162 /* We should be positioned at the start of the function name.
2163 Scan forward to find the first ':' and if it is not the
2164 first of a "::" delimiter, then this is not a member function. */
2176 look_ahead_type = NULL;
2179 new_fnlist = (struct next_fnfieldlist *)
2180 xmalloc (sizeof (struct next_fnfieldlist));
2181 make_cleanup (xfree, new_fnlist);
2182 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
2184 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2186 /* This is a completely wierd case. In order to stuff in the
2187 names that might contain colons (the usual name delimiter),
2188 Mike Tiemann defined a different name format which is
2189 signalled if the identifier is "op$". In that case, the
2190 format is "op$::XXXX." where XXXX is the name. This is
2191 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2192 /* This lets the user type "break operator+".
2193 We could just put in "+" as the name, but that wouldn't
2195 static char opname[32] = "op$";
2196 char *o = opname + 3;
2198 /* Skip past '::'. */
2201 STABS_CONTINUE (pp, objfile);
2207 main_fn_name = savestring (opname, o - opname);
2213 main_fn_name = savestring (*pp, p - *pp);
2214 /* Skip past '::'. */
2217 new_fnlist->fn_fieldlist.name = main_fn_name;
2222 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
2223 make_cleanup (xfree, new_sublist);
2224 memset (new_sublist, 0, sizeof (struct next_fnfield));
2226 /* Check for and handle cretinous dbx symbol name continuation! */
2227 if (look_ahead_type == NULL)
2230 STABS_CONTINUE (pp, objfile);
2232 new_sublist->fn_field.type = read_type (pp, objfile);
2235 /* Invalid symtab info for member function. */
2241 /* g++ version 1 kludge */
2242 new_sublist->fn_field.type = look_ahead_type;
2243 look_ahead_type = NULL;
2253 /* If this is just a stub, then we don't have the real name here. */
2255 if (TYPE_STUB (new_sublist->fn_field.type))
2257 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
2258 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
2259 new_sublist->fn_field.is_stub = 1;
2261 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2264 /* Set this member function's visibility fields. */
2267 case VISIBILITY_PRIVATE:
2268 new_sublist->fn_field.is_private = 1;
2270 case VISIBILITY_PROTECTED:
2271 new_sublist->fn_field.is_protected = 1;
2275 STABS_CONTINUE (pp, objfile);
2278 case 'A': /* Normal functions. */
2279 new_sublist->fn_field.is_const = 0;
2280 new_sublist->fn_field.is_volatile = 0;
2283 case 'B': /* `const' member functions. */
2284 new_sublist->fn_field.is_const = 1;
2285 new_sublist->fn_field.is_volatile = 0;
2288 case 'C': /* `volatile' member function. */
2289 new_sublist->fn_field.is_const = 0;
2290 new_sublist->fn_field.is_volatile = 1;
2293 case 'D': /* `const volatile' member function. */
2294 new_sublist->fn_field.is_const = 1;
2295 new_sublist->fn_field.is_volatile = 1;
2298 case '*': /* File compiled with g++ version 1 -- no info */
2303 complaint (&symfile_complaints,
2304 _("const/volatile indicator missing, got '%c'"), **pp);
2313 /* virtual member function, followed by index.
2314 The sign bit is set to distinguish pointers-to-methods
2315 from virtual function indicies. Since the array is
2316 in words, the quantity must be shifted left by 1
2317 on 16 bit machine, and by 2 on 32 bit machine, forcing
2318 the sign bit out, and usable as a valid index into
2319 the array. Remove the sign bit here. */
2320 new_sublist->fn_field.voffset =
2321 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2325 STABS_CONTINUE (pp, objfile);
2326 if (**pp == ';' || **pp == '\0')
2328 /* Must be g++ version 1. */
2329 new_sublist->fn_field.fcontext = 0;
2333 /* Figure out from whence this virtual function came.
2334 It may belong to virtual function table of
2335 one of its baseclasses. */
2336 look_ahead_type = read_type (pp, objfile);
2339 /* g++ version 1 overloaded methods. */
2343 new_sublist->fn_field.fcontext = look_ahead_type;
2352 look_ahead_type = NULL;
2358 /* static member function. */
2360 int slen = strlen (main_fn_name);
2362 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2364 /* For static member functions, we can't tell if they
2365 are stubbed, as they are put out as functions, and not as
2367 GCC v2 emits the fully mangled name if
2368 dbxout.c:flag_minimal_debug is not set, so we have to
2369 detect a fully mangled physname here and set is_stub
2370 accordingly. Fully mangled physnames in v2 start with
2371 the member function name, followed by two underscores.
2372 GCC v3 currently always emits stubbed member functions,
2373 but with fully mangled physnames, which start with _Z. */
2374 if (!(strncmp (new_sublist->fn_field.physname,
2375 main_fn_name, slen) == 0
2376 && new_sublist->fn_field.physname[slen] == '_'
2377 && new_sublist->fn_field.physname[slen + 1] == '_'))
2379 new_sublist->fn_field.is_stub = 1;
2386 complaint (&symfile_complaints,
2387 _("member function type missing, got '%c'"), (*pp)[-1]);
2388 /* Fall through into normal member function. */
2391 /* normal member function. */
2392 new_sublist->fn_field.voffset = 0;
2393 new_sublist->fn_field.fcontext = 0;
2397 new_sublist->next = sublist;
2398 sublist = new_sublist;
2400 STABS_CONTINUE (pp, objfile);
2402 while (**pp != ';' && **pp != '\0');
2405 STABS_CONTINUE (pp, objfile);
2407 /* Skip GCC 3.X member functions which are duplicates of the callable
2408 constructor/destructor. */
2409 if (strcmp (main_fn_name, "__base_ctor") == 0
2410 || strcmp (main_fn_name, "__base_dtor") == 0
2411 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2413 xfree (main_fn_name);
2418 int has_destructor = 0, has_other = 0;
2420 struct next_fnfield *tmp_sublist;
2422 /* Various versions of GCC emit various mostly-useless
2423 strings in the name field for special member functions.
2425 For stub methods, we need to defer correcting the name
2426 until we are ready to unstub the method, because the current
2427 name string is used by gdb_mangle_name. The only stub methods
2428 of concern here are GNU v2 operators; other methods have their
2429 names correct (see caveat below).
2431 For non-stub methods, in GNU v3, we have a complete physname.
2432 Therefore we can safely correct the name now. This primarily
2433 affects constructors and destructors, whose name will be
2434 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2435 operators will also have incorrect names; for instance,
2436 "operator int" will be named "operator i" (i.e. the type is
2439 For non-stub methods in GNU v2, we have no easy way to
2440 know if we have a complete physname or not. For most
2441 methods the result depends on the platform (if CPLUS_MARKER
2442 can be `$' or `.', it will use minimal debug information, or
2443 otherwise the full physname will be included).
2445 Rather than dealing with this, we take a different approach.
2446 For v3 mangled names, we can use the full physname; for v2,
2447 we use cplus_demangle_opname (which is actually v2 specific),
2448 because the only interesting names are all operators - once again
2449 barring the caveat below. Skip this process if any method in the
2450 group is a stub, to prevent our fouling up the workings of
2453 The caveat: GCC 2.95.x (and earlier?) put constructors and
2454 destructors in the same method group. We need to split this
2455 into two groups, because they should have different names.
2456 So for each method group we check whether it contains both
2457 routines whose physname appears to be a destructor (the physnames
2458 for and destructors are always provided, due to quirks in v2
2459 mangling) and routines whose physname does not appear to be a
2460 destructor. If so then we break up the list into two halves.
2461 Even if the constructors and destructors aren't in the same group
2462 the destructor will still lack the leading tilde, so that also
2465 So, to summarize what we expect and handle here:
2467 Given Given Real Real Action
2468 method name physname physname method name
2470 __opi [none] __opi__3Foo operator int opname
2472 Foo _._3Foo _._3Foo ~Foo separate and
2474 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2475 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2478 tmp_sublist = sublist;
2479 while (tmp_sublist != NULL)
2481 if (tmp_sublist->fn_field.is_stub)
2483 if (tmp_sublist->fn_field.physname[0] == '_'
2484 && tmp_sublist->fn_field.physname[1] == 'Z')
2487 if (is_destructor_name (tmp_sublist->fn_field.physname))
2492 tmp_sublist = tmp_sublist->next;
2495 if (has_destructor && has_other)
2497 struct next_fnfieldlist *destr_fnlist;
2498 struct next_fnfield *last_sublist;
2500 /* Create a new fn_fieldlist for the destructors. */
2502 destr_fnlist = (struct next_fnfieldlist *)
2503 xmalloc (sizeof (struct next_fnfieldlist));
2504 make_cleanup (xfree, destr_fnlist);
2505 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
2506 destr_fnlist->fn_fieldlist.name
2507 = obconcat (&objfile->objfile_obstack, "", "~",
2508 new_fnlist->fn_fieldlist.name);
2510 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2511 obstack_alloc (&objfile->objfile_obstack,
2512 sizeof (struct fn_field) * has_destructor);
2513 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2514 sizeof (struct fn_field) * has_destructor);
2515 tmp_sublist = sublist;
2516 last_sublist = NULL;
2518 while (tmp_sublist != NULL)
2520 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2522 tmp_sublist = tmp_sublist->next;
2526 destr_fnlist->fn_fieldlist.fn_fields[i++]
2527 = tmp_sublist->fn_field;
2529 last_sublist->next = tmp_sublist->next;
2531 sublist = tmp_sublist->next;
2532 last_sublist = tmp_sublist;
2533 tmp_sublist = tmp_sublist->next;
2536 destr_fnlist->fn_fieldlist.length = has_destructor;
2537 destr_fnlist->next = fip->fnlist;
2538 fip->fnlist = destr_fnlist;
2540 total_length += has_destructor;
2541 length -= has_destructor;
2545 /* v3 mangling prevents the use of abbreviated physnames,
2546 so we can do this here. There are stubbed methods in v3
2548 - in -gstabs instead of -gstabs+
2549 - or for static methods, which are output as a function type
2550 instead of a method type. */
2552 update_method_name_from_physname (&new_fnlist->fn_fieldlist.name,
2553 sublist->fn_field.physname);
2555 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2557 new_fnlist->fn_fieldlist.name =
2558 concat ("~", main_fn_name, (char *)NULL);
2559 xfree (main_fn_name);
2563 char dem_opname[256];
2565 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2566 dem_opname, DMGL_ANSI);
2568 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2571 new_fnlist->fn_fieldlist.name
2572 = obsavestring (dem_opname, strlen (dem_opname),
2573 &objfile->objfile_obstack);
2576 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2577 obstack_alloc (&objfile->objfile_obstack,
2578 sizeof (struct fn_field) * length);
2579 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2580 sizeof (struct fn_field) * length);
2581 for (i = length; (i--, sublist); sublist = sublist->next)
2583 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2586 new_fnlist->fn_fieldlist.length = length;
2587 new_fnlist->next = fip->fnlist;
2588 fip->fnlist = new_fnlist;
2590 total_length += length;
2596 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2597 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2598 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2599 memset (TYPE_FN_FIELDLISTS (type), 0,
2600 sizeof (struct fn_fieldlist) * nfn_fields);
2601 TYPE_NFN_FIELDS (type) = nfn_fields;
2602 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
2608 /* Special GNU C++ name.
2610 Returns 1 for success, 0 for failure. "failure" means that we can't
2611 keep parsing and it's time for error_type(). */
2614 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2615 struct objfile *objfile)
2620 struct type *context;
2630 /* At this point, *pp points to something like "22:23=*22...",
2631 where the type number before the ':' is the "context" and
2632 everything after is a regular type definition. Lookup the
2633 type, find it's name, and construct the field name. */
2635 context = read_type (pp, objfile);
2639 case 'f': /* $vf -- a virtual function table pointer */
2640 name = type_name_no_tag (context);
2645 fip->list->field.name =
2646 obconcat (&objfile->objfile_obstack, vptr_name, name, "");
2649 case 'b': /* $vb -- a virtual bsomethingorother */
2650 name = type_name_no_tag (context);
2653 complaint (&symfile_complaints,
2654 _("C++ abbreviated type name unknown at symtab pos %d"),
2658 fip->list->field.name =
2659 obconcat (&objfile->objfile_obstack, vb_name, name, "");
2663 invalid_cpp_abbrev_complaint (*pp);
2664 fip->list->field.name =
2665 obconcat (&objfile->objfile_obstack,
2666 "INVALID_CPLUSPLUS_ABBREV", "", "");
2670 /* At this point, *pp points to the ':'. Skip it and read the
2676 invalid_cpp_abbrev_complaint (*pp);
2679 fip->list->field.type = read_type (pp, objfile);
2681 (*pp)++; /* Skip the comma. */
2687 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ';', &nbits,
2692 /* This field is unpacked. */
2693 FIELD_BITSIZE (fip->list->field) = 0;
2694 fip->list->visibility = VISIBILITY_PRIVATE;
2698 invalid_cpp_abbrev_complaint (*pp);
2699 /* We have no idea what syntax an unrecognized abbrev would have, so
2700 better return 0. If we returned 1, we would need to at least advance
2701 *pp to avoid an infinite loop. */
2708 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2709 struct type *type, struct objfile *objfile)
2711 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2713 fip->list->field.name =
2714 obsavestring (*pp, p - *pp, &objfile->objfile_obstack);
2717 /* This means we have a visibility for a field coming. */
2721 fip->list->visibility = *(*pp)++;
2725 /* normal dbx-style format, no explicit visibility */
2726 fip->list->visibility = VISIBILITY_PUBLIC;
2729 fip->list->field.type = read_type (pp, objfile);
2734 /* Possible future hook for nested types. */
2737 fip->list->field.bitpos = (long) -2; /* nested type */
2747 /* Static class member. */
2748 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2752 else if (**pp != ',')
2754 /* Bad structure-type format. */
2755 stabs_general_complaint ("bad structure-type format");
2759 (*pp)++; /* Skip the comma. */
2763 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ',', &nbits, 0);
2766 stabs_general_complaint ("bad structure-type format");
2769 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2772 stabs_general_complaint ("bad structure-type format");
2777 if (FIELD_BITPOS (fip->list->field) == 0
2778 && FIELD_BITSIZE (fip->list->field) == 0)
2780 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2781 it is a field which has been optimized out. The correct stab for
2782 this case is to use VISIBILITY_IGNORE, but that is a recent
2783 invention. (2) It is a 0-size array. For example
2784 union { int num; char str[0]; } foo. Printing _("<no value>" for
2785 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2786 will continue to work, and a 0-size array as a whole doesn't
2787 have any contents to print.
2789 I suspect this probably could also happen with gcc -gstabs (not
2790 -gstabs+) for static fields, and perhaps other C++ extensions.
2791 Hopefully few people use -gstabs with gdb, since it is intended
2792 for dbx compatibility. */
2794 /* Ignore this field. */
2795 fip->list->visibility = VISIBILITY_IGNORE;
2799 /* Detect an unpacked field and mark it as such.
2800 dbx gives a bit size for all fields.
2801 Note that forward refs cannot be packed,
2802 and treat enums as if they had the width of ints. */
2804 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2806 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2807 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2808 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2809 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2811 FIELD_BITSIZE (fip->list->field) = 0;
2813 if ((FIELD_BITSIZE (fip->list->field)
2814 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2815 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2816 && FIELD_BITSIZE (fip->list->field)
2817 == gdbarch_int_bit (gdbarch))
2820 FIELD_BITPOS (fip->list->field) % 8 == 0)
2822 FIELD_BITSIZE (fip->list->field) = 0;
2828 /* Read struct or class data fields. They have the form:
2830 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2832 At the end, we see a semicolon instead of a field.
2834 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2837 The optional VISIBILITY is one of:
2839 '/0' (VISIBILITY_PRIVATE)
2840 '/1' (VISIBILITY_PROTECTED)
2841 '/2' (VISIBILITY_PUBLIC)
2842 '/9' (VISIBILITY_IGNORE)
2844 or nothing, for C style fields with public visibility.
2846 Returns 1 for success, 0 for failure. */
2849 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
2850 struct objfile *objfile)
2853 struct nextfield *new;
2855 /* We better set p right now, in case there are no fields at all... */
2859 /* Read each data member type until we find the terminating ';' at the end of
2860 the data member list, or break for some other reason such as finding the
2861 start of the member function list. */
2862 /* Stab string for structure/union does not end with two ';' in
2863 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2865 while (**pp != ';' && **pp != '\0')
2867 STABS_CONTINUE (pp, objfile);
2868 /* Get space to record the next field's data. */
2869 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
2870 make_cleanup (xfree, new);
2871 memset (new, 0, sizeof (struct nextfield));
2872 new->next = fip->list;
2875 /* Get the field name. */
2878 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2879 unless the CPLUS_MARKER is followed by an underscore, in
2880 which case it is just the name of an anonymous type, which we
2881 should handle like any other type name. */
2883 if (is_cplus_marker (p[0]) && p[1] != '_')
2885 if (!read_cpp_abbrev (fip, pp, type, objfile))
2890 /* Look for the ':' that separates the field name from the field
2891 values. Data members are delimited by a single ':', while member
2892 functions are delimited by a pair of ':'s. When we hit the member
2893 functions (if any), terminate scan loop and return. */
2895 while (*p != ':' && *p != '\0')
2902 /* Check to see if we have hit the member functions yet. */
2907 read_one_struct_field (fip, pp, p, type, objfile);
2909 if (p[0] == ':' && p[1] == ':')
2911 /* (the deleted) chill the list of fields: the last entry (at
2912 the head) is a partially constructed entry which we now
2914 fip->list = fip->list->next;
2919 /* The stabs for C++ derived classes contain baseclass information which
2920 is marked by a '!' character after the total size. This function is
2921 called when we encounter the baseclass marker, and slurps up all the
2922 baseclass information.
2924 Immediately following the '!' marker is the number of base classes that
2925 the class is derived from, followed by information for each base class.
2926 For each base class, there are two visibility specifiers, a bit offset
2927 to the base class information within the derived class, a reference to
2928 the type for the base class, and a terminating semicolon.
2930 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2932 Baseclass information marker __________________|| | | | | | |
2933 Number of baseclasses __________________________| | | | | | |
2934 Visibility specifiers (2) ________________________| | | | | |
2935 Offset in bits from start of class _________________| | | | |
2936 Type number for base class ___________________________| | | |
2937 Visibility specifiers (2) _______________________________| | |
2938 Offset in bits from start of class ________________________| |
2939 Type number of base class ____________________________________|
2941 Return 1 for success, 0 for (error-type-inducing) failure. */
2947 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
2948 struct objfile *objfile)
2951 struct nextfield *new;
2959 /* Skip the '!' baseclass information marker. */
2963 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2966 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
2972 /* Some stupid compilers have trouble with the following, so break
2973 it up into simpler expressions. */
2974 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
2975 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
2978 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
2981 pointer = (char *) TYPE_ALLOC (type, num_bytes);
2982 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
2986 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
2988 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
2990 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
2991 make_cleanup (xfree, new);
2992 memset (new, 0, sizeof (struct nextfield));
2993 new->next = fip->list;
2995 FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */
2997 STABS_CONTINUE (pp, objfile);
3001 /* Nothing to do. */
3004 SET_TYPE_FIELD_VIRTUAL (type, i);
3007 /* Unknown character. Complain and treat it as non-virtual. */
3009 complaint (&symfile_complaints,
3010 _("Unknown virtual character `%c' for baseclass"), **pp);
3015 new->visibility = *(*pp)++;
3016 switch (new->visibility)
3018 case VISIBILITY_PRIVATE:
3019 case VISIBILITY_PROTECTED:
3020 case VISIBILITY_PUBLIC:
3023 /* Bad visibility format. Complain and treat it as
3026 complaint (&symfile_complaints,
3027 _("Unknown visibility `%c' for baseclass"),
3029 new->visibility = VISIBILITY_PUBLIC;
3036 /* The remaining value is the bit offset of the portion of the object
3037 corresponding to this baseclass. Always zero in the absence of
3038 multiple inheritance. */
3040 FIELD_BITPOS (new->field) = read_huge_number (pp, ',', &nbits, 0);
3045 /* The last piece of baseclass information is the type of the
3046 base class. Read it, and remember it's type name as this
3049 new->field.type = read_type (pp, objfile);
3050 new->field.name = type_name_no_tag (new->field.type);
3052 /* skip trailing ';' and bump count of number of fields seen */
3061 /* The tail end of stabs for C++ classes that contain a virtual function
3062 pointer contains a tilde, a %, and a type number.
3063 The type number refers to the base class (possibly this class itself) which
3064 contains the vtable pointer for the current class.
3066 This function is called when we have parsed all the method declarations,
3067 so we can look for the vptr base class info. */
3070 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3071 struct objfile *objfile)
3075 STABS_CONTINUE (pp, objfile);
3077 /* If we are positioned at a ';', then skip it. */
3087 if (**pp == '=' || **pp == '+' || **pp == '-')
3089 /* Obsolete flags that used to indicate the presence
3090 of constructors and/or destructors. */
3094 /* Read either a '%' or the final ';'. */
3095 if (*(*pp)++ == '%')
3097 /* The next number is the type number of the base class
3098 (possibly our own class) which supplies the vtable for
3099 this class. Parse it out, and search that class to find
3100 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3101 and TYPE_VPTR_FIELDNO. */
3106 t = read_type (pp, objfile);
3108 while (*p != '\0' && *p != ';')
3114 /* Premature end of symbol. */
3118 TYPE_VPTR_BASETYPE (type) = t;
3119 if (type == t) /* Our own class provides vtbl ptr */
3121 for (i = TYPE_NFIELDS (t) - 1;
3122 i >= TYPE_N_BASECLASSES (t);
3125 char *name = TYPE_FIELD_NAME (t, i);
3126 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3127 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3129 TYPE_VPTR_FIELDNO (type) = i;
3133 /* Virtual function table field not found. */
3134 complaint (&symfile_complaints,
3135 _("virtual function table pointer not found when defining class `%s'"),
3141 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
3152 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3156 for (n = TYPE_NFN_FIELDS (type);
3157 fip->fnlist != NULL;
3158 fip->fnlist = fip->fnlist->next)
3160 --n; /* Circumvent Sun3 compiler bug */
3161 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3166 /* Create the vector of fields, and record how big it is.
3167 We need this info to record proper virtual function table information
3168 for this class's virtual functions. */
3171 attach_fields_to_type (struct field_info *fip, struct type *type,
3172 struct objfile *objfile)
3175 int non_public_fields = 0;
3176 struct nextfield *scan;
3178 /* Count up the number of fields that we have, as well as taking note of
3179 whether or not there are any non-public fields, which requires us to
3180 allocate and build the private_field_bits and protected_field_bits
3183 for (scan = fip->list; scan != NULL; scan = scan->next)
3186 if (scan->visibility != VISIBILITY_PUBLIC)
3188 non_public_fields++;
3192 /* Now we know how many fields there are, and whether or not there are any
3193 non-public fields. Record the field count, allocate space for the
3194 array of fields, and create blank visibility bitfields if necessary. */
3196 TYPE_NFIELDS (type) = nfields;
3197 TYPE_FIELDS (type) = (struct field *)
3198 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3199 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3201 if (non_public_fields)
3203 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3205 TYPE_FIELD_PRIVATE_BITS (type) =
3206 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3207 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3209 TYPE_FIELD_PROTECTED_BITS (type) =
3210 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3211 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3213 TYPE_FIELD_IGNORE_BITS (type) =
3214 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3215 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3218 /* Copy the saved-up fields into the field vector. Start from the head
3219 of the list, adding to the tail of the field array, so that they end
3220 up in the same order in the array in which they were added to the list. */
3222 while (nfields-- > 0)
3224 TYPE_FIELD (type, nfields) = fip->list->field;
3225 switch (fip->list->visibility)
3227 case VISIBILITY_PRIVATE:
3228 SET_TYPE_FIELD_PRIVATE (type, nfields);
3231 case VISIBILITY_PROTECTED:
3232 SET_TYPE_FIELD_PROTECTED (type, nfields);
3235 case VISIBILITY_IGNORE:
3236 SET_TYPE_FIELD_IGNORE (type, nfields);
3239 case VISIBILITY_PUBLIC:
3243 /* Unknown visibility. Complain and treat it as public. */
3245 complaint (&symfile_complaints, _("Unknown visibility `%c' for field"),
3246 fip->list->visibility);
3250 fip->list = fip->list->next;
3256 /* Complain that the compiler has emitted more than one definition for the
3257 structure type TYPE. */
3259 complain_about_struct_wipeout (struct type *type)
3264 if (TYPE_TAG_NAME (type))
3266 name = TYPE_TAG_NAME (type);
3267 switch (TYPE_CODE (type))
3269 case TYPE_CODE_STRUCT: kind = "struct "; break;
3270 case TYPE_CODE_UNION: kind = "union "; break;
3271 case TYPE_CODE_ENUM: kind = "enum "; break;
3275 else if (TYPE_NAME (type))
3277 name = TYPE_NAME (type);
3286 complaint (&symfile_complaints,
3287 _("struct/union type gets multiply defined: %s%s"), kind, name);
3291 /* Read the description of a structure (or union type) and return an object
3292 describing the type.
3294 PP points to a character pointer that points to the next unconsumed token
3295 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3296 *PP will point to "4a:1,0,32;;".
3298 TYPE points to an incomplete type that needs to be filled in.
3300 OBJFILE points to the current objfile from which the stabs information is
3301 being read. (Note that it is redundant in that TYPE also contains a pointer
3302 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3305 static struct type *
3306 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3307 struct objfile *objfile)
3309 struct cleanup *back_to;
3310 struct field_info fi;
3315 /* When describing struct/union/class types in stabs, G++ always drops
3316 all qualifications from the name. So if you've got:
3317 struct A { ... struct B { ... }; ... };
3318 then G++ will emit stabs for `struct A::B' that call it simply
3319 `struct B'. Obviously, if you've got a real top-level definition for
3320 `struct B', or other nested definitions, this is going to cause
3323 Obviously, GDB can't fix this by itself, but it can at least avoid
3324 scribbling on existing structure type objects when new definitions
3326 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3327 || TYPE_STUB (type)))
3329 complain_about_struct_wipeout (type);
3331 /* It's probably best to return the type unchanged. */
3335 back_to = make_cleanup (null_cleanup, 0);
3337 INIT_CPLUS_SPECIFIC (type);
3338 TYPE_CODE (type) = type_code;
3339 TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
3341 /* First comes the total size in bytes. */
3345 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3347 return error_type (pp, objfile);
3350 /* Now read the baseclasses, if any, read the regular C struct or C++
3351 class member fields, attach the fields to the type, read the C++
3352 member functions, attach them to the type, and then read any tilde
3353 field (baseclass specifier for the class holding the main vtable). */
3355 if (!read_baseclasses (&fi, pp, type, objfile)
3356 || !read_struct_fields (&fi, pp, type, objfile)
3357 || !attach_fields_to_type (&fi, type, objfile)
3358 || !read_member_functions (&fi, pp, type, objfile)
3359 || !attach_fn_fields_to_type (&fi, type)
3360 || !read_tilde_fields (&fi, pp, type, objfile))
3362 type = error_type (pp, objfile);
3365 do_cleanups (back_to);
3369 /* Read a definition of an array type,
3370 and create and return a suitable type object.
3371 Also creates a range type which represents the bounds of that
3374 static struct type *
3375 read_array_type (char **pp, struct type *type,
3376 struct objfile *objfile)
3378 struct type *index_type, *element_type, *range_type;
3383 /* Format of an array type:
3384 "ar<index type>;lower;upper;<array_contents_type>".
3385 OS9000: "arlower,upper;<array_contents_type>".
3387 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3388 for these, produce a type like float[][]. */
3391 index_type = read_type (pp, objfile);
3393 /* Improper format of array type decl. */
3394 return error_type (pp, objfile);
3398 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3403 lower = read_huge_number (pp, ';', &nbits, 0);
3406 return error_type (pp, objfile);
3408 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3413 upper = read_huge_number (pp, ';', &nbits, 0);
3415 return error_type (pp, objfile);
3417 element_type = read_type (pp, objfile);
3426 create_range_type ((struct type *) NULL, index_type, lower, upper);
3427 type = create_array_type (type, element_type, range_type);
3433 /* Read a definition of an enumeration type,
3434 and create and return a suitable type object.
3435 Also defines the symbols that represent the values of the type. */
3437 static struct type *
3438 read_enum_type (char **pp, struct type *type,
3439 struct objfile *objfile)
3441 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3447 struct pending **symlist;
3448 struct pending *osyms, *syms;
3451 int unsigned_enum = 1;
3454 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3455 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3456 to do? For now, force all enum values to file scope. */
3457 if (within_function)
3458 symlist = &local_symbols;
3461 symlist = &file_symbols;
3463 o_nsyms = osyms ? osyms->nsyms : 0;
3465 /* The aix4 compiler emits an extra field before the enum members;
3466 my guess is it's a type of some sort. Just ignore it. */
3469 /* Skip over the type. */
3473 /* Skip over the colon. */
3477 /* Read the value-names and their values.
3478 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3479 A semicolon or comma instead of a NAME means the end. */
3480 while (**pp && **pp != ';' && **pp != ',')
3482 STABS_CONTINUE (pp, objfile);
3486 name = obsavestring (*pp, p - *pp, &objfile->objfile_obstack);
3488 n = read_huge_number (pp, ',', &nbits, 0);
3490 return error_type (pp, objfile);
3492 sym = (struct symbol *)
3493 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
3494 memset (sym, 0, sizeof (struct symbol));
3495 SYMBOL_SET_LINKAGE_NAME (sym, name);
3496 SYMBOL_LANGUAGE (sym) = current_subfile->language;
3497 SYMBOL_CLASS (sym) = LOC_CONST;
3498 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3499 SYMBOL_VALUE (sym) = n;
3502 add_symbol_to_list (sym, symlist);
3507 (*pp)++; /* Skip the semicolon. */
3509 /* Now fill in the fields of the type-structure. */
3511 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3512 TYPE_CODE (type) = TYPE_CODE_ENUM;
3513 TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
3515 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
3516 TYPE_NFIELDS (type) = nsyms;
3517 TYPE_FIELDS (type) = (struct field *)
3518 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3519 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3521 /* Find the symbols for the values and put them into the type.
3522 The symbols can be found in the symlist that we put them on
3523 to cause them to be defined. osyms contains the old value
3524 of that symlist; everything up to there was defined by us. */
3525 /* Note that we preserve the order of the enum constants, so
3526 that in something like "enum {FOO, LAST_THING=FOO}" we print
3527 FOO, not LAST_THING. */
3529 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3531 int last = syms == osyms ? o_nsyms : 0;
3532 int j = syms->nsyms;
3533 for (; --j >= last; --n)
3535 struct symbol *xsym = syms->symbol[j];
3536 SYMBOL_TYPE (xsym) = type;
3537 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3538 TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
3539 TYPE_FIELD_BITSIZE (type, n) = 0;
3548 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3549 typedefs in every file (for int, long, etc):
3551 type = b <signed> <width> <format type>; <offset>; <nbits>
3553 optional format type = c or b for char or boolean.
3554 offset = offset from high order bit to start bit of type.
3555 width is # bytes in object of this type, nbits is # bits in type.
3557 The width/offset stuff appears to be for small objects stored in
3558 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3561 static struct type *
3562 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3567 enum type_code code = TYPE_CODE_INT;
3578 return error_type (pp, objfile);
3582 /* For some odd reason, all forms of char put a c here. This is strange
3583 because no other type has this honor. We can safely ignore this because
3584 we actually determine 'char'acterness by the number of bits specified in
3586 Boolean forms, e.g Fortran logical*X, put a b here. */
3590 else if (**pp == 'b')
3592 code = TYPE_CODE_BOOL;
3596 /* The first number appears to be the number of bytes occupied
3597 by this type, except that unsigned short is 4 instead of 2.
3598 Since this information is redundant with the third number,
3599 we will ignore it. */
3600 read_huge_number (pp, ';', &nbits, 0);
3602 return error_type (pp, objfile);
3604 /* The second number is always 0, so ignore it too. */
3605 read_huge_number (pp, ';', &nbits, 0);
3607 return error_type (pp, objfile);
3609 /* The third number is the number of bits for this type. */
3610 type_bits = read_huge_number (pp, 0, &nbits, 0);
3612 return error_type (pp, objfile);
3613 /* The type *should* end with a semicolon. If it are embedded
3614 in a larger type the semicolon may be the only way to know where
3615 the type ends. If this type is at the end of the stabstring we
3616 can deal with the omitted semicolon (but we don't have to like
3617 it). Don't bother to complain(), Sun's compiler omits the semicolon
3623 return init_type (TYPE_CODE_VOID, 1,
3624 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3627 return init_type (code,
3628 type_bits / TARGET_CHAR_BIT,
3629 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3633 static struct type *
3634 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3639 struct type *rettype;
3641 /* The first number has more details about the type, for example
3643 details = read_huge_number (pp, ';', &nbits, 0);
3645 return error_type (pp, objfile);
3647 /* The second number is the number of bytes occupied by this type */
3648 nbytes = read_huge_number (pp, ';', &nbits, 0);
3650 return error_type (pp, objfile);
3652 if (details == NF_COMPLEX || details == NF_COMPLEX16
3653 || details == NF_COMPLEX32)
3655 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
3656 TYPE_TARGET_TYPE (rettype)
3657 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
3661 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
3664 /* Read a number from the string pointed to by *PP.
3665 The value of *PP is advanced over the number.
3666 If END is nonzero, the character that ends the
3667 number must match END, or an error happens;
3668 and that character is skipped if it does match.
3669 If END is zero, *PP is left pointing to that character.
3671 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3672 the number is represented in an octal representation, assume that
3673 it is represented in a 2's complement representation with a size of
3674 TWOS_COMPLEMENT_BITS.
3676 If the number fits in a long, set *BITS to 0 and return the value.
3677 If not, set *BITS to be the number of bits in the number and return 0.
3679 If encounter garbage, set *BITS to -1 and return 0. */
3682 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3693 int twos_complement_representation = 0;
3701 /* Leading zero means octal. GCC uses this to output values larger
3702 than an int (because that would be hard in decimal). */
3709 /* Skip extra zeros. */
3713 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3715 /* Octal, possibly signed. Check if we have enough chars for a
3720 while ((c = *p1) >= '0' && c < '8')
3724 if (len > twos_complement_bits / 3
3725 || (twos_complement_bits % 3 == 0 && len == twos_complement_bits / 3))
3727 /* Ok, we have enough characters for a signed value, check
3728 for signness by testing if the sign bit is set. */
3729 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3731 if (c & (1 << sign_bit))
3733 /* Definitely signed. */
3734 twos_complement_representation = 1;
3740 upper_limit = LONG_MAX / radix;
3742 while ((c = *p++) >= '0' && c < ('0' + radix))
3744 if (n <= upper_limit)
3746 if (twos_complement_representation)
3748 /* Octal, signed, twos complement representation. In
3749 this case, n is the corresponding absolute value. */
3752 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3763 /* unsigned representation */
3765 n += c - '0'; /* FIXME this overflows anyway */
3771 /* This depends on large values being output in octal, which is
3778 /* Ignore leading zeroes. */
3782 else if (c == '2' || c == '3')
3803 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
3805 /* We were supposed to parse a number with maximum
3806 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3817 /* Large decimal constants are an error (because it is hard to
3818 count how many bits are in them). */
3824 /* -0x7f is the same as 0x80. So deal with it by adding one to
3825 the number of bits. Two's complement represention octals
3826 can't have a '-' in front. */
3827 if (sign == -1 && !twos_complement_representation)
3838 /* It's *BITS which has the interesting information. */
3842 static struct type *
3843 read_range_type (char **pp, int typenums[2], int type_size,
3844 struct objfile *objfile)
3846 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3847 char *orig_pp = *pp;
3852 struct type *result_type;
3853 struct type *index_type = NULL;
3855 /* First comes a type we are a subrange of.
3856 In C it is usually 0, 1 or the type being defined. */
3857 if (read_type_number (pp, rangenums) != 0)
3858 return error_type (pp, objfile);
3859 self_subrange = (rangenums[0] == typenums[0] &&
3860 rangenums[1] == typenums[1]);
3865 index_type = read_type (pp, objfile);
3868 /* A semicolon should now follow; skip it. */
3872 /* The remaining two operands are usually lower and upper bounds
3873 of the range. But in some special cases they mean something else. */
3874 n2 = read_huge_number (pp, ';', &n2bits, type_size);
3875 n3 = read_huge_number (pp, ';', &n3bits, type_size);
3877 if (n2bits == -1 || n3bits == -1)
3878 return error_type (pp, objfile);
3881 goto handle_true_range;
3883 /* If limits are huge, must be large integral type. */
3884 if (n2bits != 0 || n3bits != 0)
3886 char got_signed = 0;
3887 char got_unsigned = 0;
3888 /* Number of bits in the type. */
3891 /* If a type size attribute has been specified, the bounds of
3892 the range should fit in this size. If the lower bounds needs
3893 more bits than the upper bound, then the type is signed. */
3894 if (n2bits <= type_size && n3bits <= type_size)
3896 if (n2bits == type_size && n2bits > n3bits)
3902 /* Range from 0 to <large number> is an unsigned large integral type. */
3903 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
3908 /* Range from <large number> to <large number>-1 is a large signed
3909 integral type. Take care of the case where <large number> doesn't
3910 fit in a long but <large number>-1 does. */
3911 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
3912 || (n2bits != 0 && n3bits == 0
3913 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
3920 if (got_signed || got_unsigned)
3922 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
3923 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
3927 return error_type (pp, objfile);
3930 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3931 if (self_subrange && n2 == 0 && n3 == 0)
3932 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
3934 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3935 is the width in bytes.
3937 Fortran programs appear to use this for complex types also. To
3938 distinguish between floats and complex, g77 (and others?) seem
3939 to use self-subranges for the complexes, and subranges of int for
3942 Also note that for complexes, g77 sets n2 to the size of one of
3943 the member floats, not the whole complex beast. My guess is that
3944 this was to work well with pre-COMPLEX versions of gdb. */
3946 if (n3 == 0 && n2 > 0)
3948 struct type *float_type
3949 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
3953 struct type *complex_type =
3954 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
3955 TYPE_TARGET_TYPE (complex_type) = float_type;
3956 return complex_type;
3962 /* If the upper bound is -1, it must really be an unsigned integral. */
3964 else if (n2 == 0 && n3 == -1)
3966 int bits = type_size;
3969 /* We don't know its size. It is unsigned int or unsigned
3970 long. GCC 2.3.3 uses this for long long too, but that is
3971 just a GDB 3.5 compatibility hack. */
3972 bits = gdbarch_int_bit (gdbarch);
3975 return init_type (TYPE_CODE_INT, bits / TARGET_CHAR_BIT,
3976 TYPE_FLAG_UNSIGNED, NULL, objfile);
3979 /* Special case: char is defined (Who knows why) as a subrange of
3980 itself with range 0-127. */
3981 else if (self_subrange && n2 == 0 && n3 == 127)
3982 return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile);
3984 /* We used to do this only for subrange of self or subrange of int. */
3987 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
3988 "unsigned long", and we already checked for that,
3989 so don't need to test for it here. */
3992 /* n3 actually gives the size. */
3993 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
3996 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
3997 unsigned n-byte integer. But do require n to be a power of
3998 two; we don't want 3- and 5-byte integers flying around. */
4004 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4007 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4008 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4012 /* I think this is for Convex "long long". Since I don't know whether
4013 Convex sets self_subrange, I also accept that particular size regardless
4014 of self_subrange. */
4015 else if (n3 == 0 && n2 < 0
4017 || n2 == -gdbarch_long_long_bit
4018 (gdbarch) / TARGET_CHAR_BIT))
4019 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4020 else if (n2 == -n3 - 1)
4023 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4025 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4026 if (n3 == 0x7fffffff)
4027 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4030 /* We have a real range type on our hands. Allocate space and
4031 return a real pointer. */
4035 index_type = builtin_type (gdbarch)->builtin_int;
4037 index_type = *dbx_lookup_type (rangenums);
4038 if (index_type == NULL)
4040 /* Does this actually ever happen? Is that why we are worrying
4041 about dealing with it rather than just calling error_type? */
4043 complaint (&symfile_complaints,
4044 _("base type %d of range type is not defined"), rangenums[1]);
4046 index_type = builtin_type (gdbarch)->builtin_int;
4049 result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
4050 return (result_type);
4053 /* Read in an argument list. This is a list of types, separated by commas
4054 and terminated with END. Return the list of types read in, or NULL
4055 if there is an error. */
4057 static struct field *
4058 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4061 /* FIXME! Remove this arbitrary limit! */
4062 struct type *types[1024]; /* allow for fns of 1023 parameters */
4069 /* Invalid argument list: no ','. */
4072 STABS_CONTINUE (pp, objfile);
4073 types[n++] = read_type (pp, objfile);
4075 (*pp)++; /* get past `end' (the ':' character) */
4077 if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4085 rval = (struct field *) xmalloc (n * sizeof (struct field));
4086 memset (rval, 0, n * sizeof (struct field));
4087 for (i = 0; i < n; i++)
4088 rval[i].type = types[i];
4093 /* Common block handling. */
4095 /* List of symbols declared since the last BCOMM. This list is a tail
4096 of local_symbols. When ECOMM is seen, the symbols on the list
4097 are noted so their proper addresses can be filled in later,
4098 using the common block base address gotten from the assembler
4101 static struct pending *common_block;
4102 static int common_block_i;
4104 /* Name of the current common block. We get it from the BCOMM instead of the
4105 ECOMM to match IBM documentation (even though IBM puts the name both places
4106 like everyone else). */
4107 static char *common_block_name;
4109 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4110 to remain after this function returns. */
4113 common_block_start (char *name, struct objfile *objfile)
4115 if (common_block_name != NULL)
4117 complaint (&symfile_complaints,
4118 _("Invalid symbol data: common block within common block"));
4120 common_block = local_symbols;
4121 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4122 common_block_name = obsavestring (name, strlen (name),
4123 &objfile->objfile_obstack);
4126 /* Process a N_ECOMM symbol. */
4129 common_block_end (struct objfile *objfile)
4131 /* Symbols declared since the BCOMM are to have the common block
4132 start address added in when we know it. common_block and
4133 common_block_i point to the first symbol after the BCOMM in
4134 the local_symbols list; copy the list and hang it off the
4135 symbol for the common block name for later fixup. */
4138 struct pending *new = 0;
4139 struct pending *next;
4142 if (common_block_name == NULL)
4144 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4148 sym = (struct symbol *)
4149 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
4150 memset (sym, 0, sizeof (struct symbol));
4151 /* Note: common_block_name already saved on objfile_obstack */
4152 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4153 SYMBOL_CLASS (sym) = LOC_BLOCK;
4155 /* Now we copy all the symbols which have been defined since the BCOMM. */
4157 /* Copy all the struct pendings before common_block. */
4158 for (next = local_symbols;
4159 next != NULL && next != common_block;
4162 for (j = 0; j < next->nsyms; j++)
4163 add_symbol_to_list (next->symbol[j], &new);
4166 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4167 NULL, it means copy all the local symbols (which we already did
4170 if (common_block != NULL)
4171 for (j = common_block_i; j < common_block->nsyms; j++)
4172 add_symbol_to_list (common_block->symbol[j], &new);
4174 SYMBOL_TYPE (sym) = (struct type *) new;
4176 /* Should we be putting local_symbols back to what it was?
4179 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4180 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4181 global_sym_chain[i] = sym;
4182 common_block_name = NULL;
4185 /* Add a common block's start address to the offset of each symbol
4186 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4187 the common block name). */
4190 fix_common_block (struct symbol *sym, int valu)
4192 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4193 for (; next; next = next->next)
4196 for (j = next->nsyms - 1; j >= 0; j--)
4197 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4203 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4204 See add_undefined_type for more details. */
4207 add_undefined_type_noname (struct type *type, int typenums[2])
4211 nat.typenums[0] = typenums [0];
4212 nat.typenums[1] = typenums [1];
4215 if (noname_undefs_length == noname_undefs_allocated)
4217 noname_undefs_allocated *= 2;
4218 noname_undefs = (struct nat *)
4219 xrealloc ((char *) noname_undefs,
4220 noname_undefs_allocated * sizeof (struct nat));
4222 noname_undefs[noname_undefs_length++] = nat;
4225 /* Add TYPE to the UNDEF_TYPES vector.
4226 See add_undefined_type for more details. */
4229 add_undefined_type_1 (struct type *type)
4231 if (undef_types_length == undef_types_allocated)
4233 undef_types_allocated *= 2;
4234 undef_types = (struct type **)
4235 xrealloc ((char *) undef_types,
4236 undef_types_allocated * sizeof (struct type *));
4238 undef_types[undef_types_length++] = type;
4241 /* What about types defined as forward references inside of a small lexical
4243 /* Add a type to the list of undefined types to be checked through
4244 once this file has been read in.
4246 In practice, we actually maintain two such lists: The first list
4247 (UNDEF_TYPES) is used for types whose name has been provided, and
4248 concerns forward references (eg 'xs' or 'xu' forward references);
4249 the second list (NONAME_UNDEFS) is used for types whose name is
4250 unknown at creation time, because they were referenced through
4251 their type number before the actual type was declared.
4252 This function actually adds the given type to the proper list. */
4255 add_undefined_type (struct type *type, int typenums[2])
4257 if (TYPE_TAG_NAME (type) == NULL)
4258 add_undefined_type_noname (type, typenums);
4260 add_undefined_type_1 (type);
4263 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4266 cleanup_undefined_types_noname (void)
4270 for (i = 0; i < noname_undefs_length; i++)
4272 struct nat nat = noname_undefs[i];
4275 type = dbx_lookup_type (nat.typenums);
4276 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4278 /* The instance flags of the undefined type are still unset,
4279 and needs to be copied over from the reference type.
4280 Since replace_type expects them to be identical, we need
4281 to set these flags manually before hand. */
4282 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4283 replace_type (nat.type, *type);
4287 noname_undefs_length = 0;
4290 /* Go through each undefined type, see if it's still undefined, and fix it
4291 up if possible. We have two kinds of undefined types:
4293 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4294 Fix: update array length using the element bounds
4295 and the target type's length.
4296 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4297 yet defined at the time a pointer to it was made.
4298 Fix: Do a full lookup on the struct/union tag. */
4301 cleanup_undefined_types_1 (void)
4305 /* Iterate over every undefined type, and look for a symbol whose type
4306 matches our undefined type. The symbol matches if:
4307 1. It is a typedef in the STRUCT domain;
4308 2. It has the same name, and same type code;
4309 3. The instance flags are identical.
4311 It is important to check the instance flags, because we have seen
4312 examples where the debug info contained definitions such as:
4314 "foo_t:t30=B31=xefoo_t:"
4316 In this case, we have created an undefined type named "foo_t" whose
4317 instance flags is null (when processing "xefoo_t"), and then created
4318 another type with the same name, but with different instance flags
4319 ('B' means volatile). I think that the definition above is wrong,
4320 since the same type cannot be volatile and non-volatile at the same
4321 time, but we need to be able to cope with it when it happens. The
4322 approach taken here is to treat these two types as different. */
4324 for (type = undef_types; type < undef_types + undef_types_length; type++)
4326 switch (TYPE_CODE (*type))
4329 case TYPE_CODE_STRUCT:
4330 case TYPE_CODE_UNION:
4331 case TYPE_CODE_ENUM:
4333 /* Check if it has been defined since. Need to do this here
4334 as well as in check_typedef to deal with the (legitimate in
4335 C though not C++) case of several types with the same name
4336 in different source files. */
4337 if (TYPE_STUB (*type))
4339 struct pending *ppt;
4341 /* Name of the type, without "struct" or "union" */
4342 char *typename = TYPE_TAG_NAME (*type);
4344 if (typename == NULL)
4346 complaint (&symfile_complaints, _("need a type name"));
4349 for (ppt = file_symbols; ppt; ppt = ppt->next)
4351 for (i = 0; i < ppt->nsyms; i++)
4353 struct symbol *sym = ppt->symbol[i];
4355 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4356 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4357 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4359 && (TYPE_INSTANCE_FLAGS (*type) ==
4360 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4361 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4363 replace_type (*type, SYMBOL_TYPE (sym));
4372 complaint (&symfile_complaints,
4373 _("forward-referenced types left unresolved, "
4381 undef_types_length = 0;
4384 /* Try to fix all the undefined types we ecountered while processing
4388 cleanup_undefined_types (void)
4390 cleanup_undefined_types_1 ();
4391 cleanup_undefined_types_noname ();
4394 /* Scan through all of the global symbols defined in the object file,
4395 assigning values to the debugging symbols that need to be assigned
4396 to. Get these symbols from the minimal symbol table. */
4399 scan_file_globals (struct objfile *objfile)
4402 struct minimal_symbol *msymbol;
4403 struct symbol *sym, *prev;
4404 struct objfile *resolve_objfile;
4406 /* SVR4 based linkers copy referenced global symbols from shared
4407 libraries to the main executable.
4408 If we are scanning the symbols for a shared library, try to resolve
4409 them from the minimal symbols of the main executable first. */
4411 if (symfile_objfile && objfile != symfile_objfile)
4412 resolve_objfile = symfile_objfile;
4414 resolve_objfile = objfile;
4418 /* Avoid expensive loop through all minimal symbols if there are
4419 no unresolved symbols. */
4420 for (hash = 0; hash < HASHSIZE; hash++)
4422 if (global_sym_chain[hash])
4425 if (hash >= HASHSIZE)
4428 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4432 /* Skip static symbols. */
4433 switch (MSYMBOL_TYPE (msymbol))
4445 /* Get the hash index and check all the symbols
4446 under that hash index. */
4448 hash = hashname (SYMBOL_LINKAGE_NAME (msymbol));
4450 for (sym = global_sym_chain[hash]; sym;)
4452 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol),
4453 SYMBOL_LINKAGE_NAME (sym)) == 0)
4455 /* Splice this symbol out of the hash chain and
4456 assign the value we have to it. */
4459 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4463 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4466 /* Check to see whether we need to fix up a common block. */
4467 /* Note: this code might be executed several times for
4468 the same symbol if there are multiple references. */
4471 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4473 fix_common_block (sym,
4474 SYMBOL_VALUE_ADDRESS (msymbol));
4478 SYMBOL_VALUE_ADDRESS (sym)
4479 = SYMBOL_VALUE_ADDRESS (msymbol);
4481 SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
4486 sym = SYMBOL_VALUE_CHAIN (prev);
4490 sym = global_sym_chain[hash];
4496 sym = SYMBOL_VALUE_CHAIN (sym);
4500 if (resolve_objfile == objfile)
4502 resolve_objfile = objfile;
4505 /* Change the storage class of any remaining unresolved globals to
4506 LOC_UNRESOLVED and remove them from the chain. */
4507 for (hash = 0; hash < HASHSIZE; hash++)
4509 sym = global_sym_chain[hash];
4513 sym = SYMBOL_VALUE_CHAIN (sym);
4515 /* Change the symbol address from the misleading chain value
4517 SYMBOL_VALUE_ADDRESS (prev) = 0;
4519 /* Complain about unresolved common block symbols. */
4520 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4521 SYMBOL_CLASS (prev) = LOC_UNRESOLVED;
4523 complaint (&symfile_complaints,
4524 _("%s: common block `%s' from global_sym_chain unresolved"),
4525 objfile->name, SYMBOL_PRINT_NAME (prev));
4528 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4531 /* Initialize anything that needs initializing when starting to read
4532 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4536 stabsread_init (void)
4540 /* Initialize anything that needs initializing when a completely new
4541 symbol file is specified (not just adding some symbols from another
4542 file, e.g. a shared library). */
4545 stabsread_new_init (void)
4547 /* Empty the hash table of global syms looking for values. */
4548 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4551 /* Initialize anything that needs initializing at the same time as
4552 start_symtab() is called. */
4557 global_stabs = NULL; /* AIX COFF */
4558 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4559 n_this_object_header_files = 1;
4560 type_vector_length = 0;
4561 type_vector = (struct type **) 0;
4563 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4564 common_block_name = NULL;
4567 /* Call after end_symtab() */
4574 xfree (type_vector);
4577 type_vector_length = 0;
4578 previous_stab_code = 0;
4582 finish_global_stabs (struct objfile *objfile)
4586 patch_block_stabs (global_symbols, global_stabs, objfile);
4587 xfree (global_stabs);
4588 global_stabs = NULL;
4592 /* Find the end of the name, delimited by a ':', but don't match
4593 ObjC symbols which look like -[Foo bar::]:bla. */
4595 find_name_end (char *name)
4598 if (s[0] == '-' || *s == '+')
4600 /* Must be an ObjC method symbol. */
4603 error (_("invalid symbol name \"%s\""), name);
4605 s = strchr (s, ']');
4608 error (_("invalid symbol name \"%s\""), name);
4610 return strchr (s, ':');
4614 return strchr (s, ':');
4618 /* Initializer for this module */
4621 _initialize_stabsread (void)
4623 undef_types_allocated = 20;
4624 undef_types_length = 0;
4625 undef_types = (struct type **)
4626 xmalloc (undef_types_allocated * sizeof (struct type *));
4628 noname_undefs_allocated = 20;
4629 noname_undefs_length = 0;
4630 noname_undefs = (struct nat *)
4631 xmalloc (noname_undefs_allocated * sizeof (struct nat));