1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used with many systems that use
22 the a.out object file format, as well as some systems that use
23 COFF or ELF where the stabs data is placed in a special section.
24 Avoid placing any object file format specific code in this file. */
27 #include "gdb_string.h"
29 #include "gdb_obstack.h"
32 #include "expression.h"
35 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
37 #include "aout/aout64.h"
38 #include "gdb-stabs.h"
40 #include "complaints.h"
42 #include "gdb-demangle.h"
46 #include "cp-support.h"
47 #include "gdb_assert.h"
51 /* Ask stabsread.h to define the vars it normally declares `extern'. */
54 #include "stabsread.h" /* Our own declarations */
57 extern void _initialize_stabsread (void);
59 /* The routines that read and process a complete stabs for a C struct or
60 C++ class pass lists of data member fields and lists of member function
61 fields in an instance of a field_info structure, as defined below.
62 This is part of some reorganization of low level C++ support and is
63 expected to eventually go away... (FIXME) */
69 struct nextfield *next;
71 /* This is the raw visibility from the stab. It is not checked
72 for being one of the visibilities we recognize, so code which
73 examines this field better be able to deal. */
79 struct next_fnfieldlist
81 struct next_fnfieldlist *next;
82 struct fn_fieldlist fn_fieldlist;
88 read_one_struct_field (struct field_info *, char **, char *,
89 struct type *, struct objfile *);
91 static struct type *dbx_alloc_type (int[2], struct objfile *);
93 static long read_huge_number (char **, int, int *, int);
95 static struct type *error_type (char **, struct objfile *);
98 patch_block_stabs (struct pending *, struct pending_stabs *,
101 static void fix_common_block (struct symbol *, CORE_ADDR);
103 static int read_type_number (char **, int *);
105 static struct type *read_type (char **, struct objfile *);
107 static struct type *read_range_type (char **, int[2], int, struct objfile *);
109 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
111 static struct type *read_sun_floating_type (char **, int[2],
114 static struct type *read_enum_type (char **, struct type *, struct objfile *);
116 static struct type *rs6000_builtin_type (int, struct objfile *);
119 read_member_functions (struct field_info *, char **, struct type *,
123 read_struct_fields (struct field_info *, char **, struct type *,
127 read_baseclasses (struct field_info *, char **, struct type *,
131 read_tilde_fields (struct field_info *, char **, struct type *,
134 static int attach_fn_fields_to_type (struct field_info *, struct type *);
136 static int attach_fields_to_type (struct field_info *, struct type *,
139 static struct type *read_struct_type (char **, struct type *,
143 static struct type *read_array_type (char **, struct type *,
146 static struct field *read_args (char **, int, struct objfile *, int *, int *);
148 static void add_undefined_type (struct type *, int[2]);
151 read_cpp_abbrev (struct field_info *, char **, struct type *,
154 static char *find_name_end (char *name);
156 static int process_reference (char **string);
158 void stabsread_clear_cache (void);
160 static const char vptr_name[] = "_vptr$";
161 static const char vb_name[] = "_vb$";
164 invalid_cpp_abbrev_complaint (const char *arg1)
166 complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
170 reg_value_complaint (int regnum, int num_regs, const char *sym)
172 complaint (&symfile_complaints,
173 _("register number %d too large (max %d) in symbol %s"),
174 regnum, num_regs - 1, sym);
178 stabs_general_complaint (const char *arg1)
180 complaint (&symfile_complaints, "%s", arg1);
183 /* Make a list of forward references which haven't been defined. */
185 static struct type **undef_types;
186 static int undef_types_allocated;
187 static int undef_types_length;
188 static struct symbol *current_symbol = NULL;
190 /* Make a list of nameless types that are undefined.
191 This happens when another type is referenced by its number
192 before this type is actually defined. For instance "t(0,1)=k(0,2)"
193 and type (0,2) is defined only later. */
200 static struct nat *noname_undefs;
201 static int noname_undefs_allocated;
202 static int noname_undefs_length;
204 /* Check for and handle cretinous stabs symbol name continuation! */
205 #define STABS_CONTINUE(pp,objfile) \
207 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
208 *(pp) = next_symbol_text (objfile); \
212 /* Look up a dbx type-number pair. Return the address of the slot
213 where the type for that number-pair is stored.
214 The number-pair is in TYPENUMS.
216 This can be used for finding the type associated with that pair
217 or for associating a new type with the pair. */
219 static struct type **
220 dbx_lookup_type (int typenums[2], struct objfile *objfile)
222 int filenum = typenums[0];
223 int index = typenums[1];
226 struct header_file *f;
229 if (filenum == -1) /* -1,-1 is for temporary types. */
232 if (filenum < 0 || filenum >= n_this_object_header_files)
234 complaint (&symfile_complaints,
235 _("Invalid symbol data: type number "
236 "(%d,%d) out of range at symtab pos %d."),
237 filenum, index, symnum);
245 /* Caller wants address of address of type. We think
246 that negative (rs6k builtin) types will never appear as
247 "lvalues", (nor should they), so we stuff the real type
248 pointer into a temp, and return its address. If referenced,
249 this will do the right thing. */
250 static struct type *temp_type;
252 temp_type = rs6000_builtin_type (index, objfile);
256 /* Type is defined outside of header files.
257 Find it in this object file's type vector. */
258 if (index >= type_vector_length)
260 old_len = type_vector_length;
263 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
264 type_vector = (struct type **)
265 xmalloc (type_vector_length * sizeof (struct type *));
267 while (index >= type_vector_length)
269 type_vector_length *= 2;
271 type_vector = (struct type **)
272 xrealloc ((char *) type_vector,
273 (type_vector_length * sizeof (struct type *)));
274 memset (&type_vector[old_len], 0,
275 (type_vector_length - old_len) * sizeof (struct type *));
277 return (&type_vector[index]);
281 real_filenum = this_object_header_files[filenum];
283 if (real_filenum >= N_HEADER_FILES (objfile))
285 static struct type *temp_type;
287 warning (_("GDB internal error: bad real_filenum"));
290 temp_type = objfile_type (objfile)->builtin_error;
294 f = HEADER_FILES (objfile) + real_filenum;
296 f_orig_length = f->length;
297 if (index >= f_orig_length)
299 while (index >= f->length)
303 f->vector = (struct type **)
304 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
305 memset (&f->vector[f_orig_length], 0,
306 (f->length - f_orig_length) * sizeof (struct type *));
308 return (&f->vector[index]);
312 /* Make sure there is a type allocated for type numbers TYPENUMS
313 and return the type object.
314 This can create an empty (zeroed) type object.
315 TYPENUMS may be (-1, -1) to return a new type object that is not
316 put into the type vector, and so may not be referred to by number. */
319 dbx_alloc_type (int typenums[2], struct objfile *objfile)
321 struct type **type_addr;
323 if (typenums[0] == -1)
325 return (alloc_type (objfile));
328 type_addr = dbx_lookup_type (typenums, objfile);
330 /* If we are referring to a type not known at all yet,
331 allocate an empty type for it.
332 We will fill it in later if we find out how. */
335 *type_addr = alloc_type (objfile);
341 /* for all the stabs in a given stab vector, build appropriate types
342 and fix their symbols in given symbol vector. */
345 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
346 struct objfile *objfile)
355 /* for all the stab entries, find their corresponding symbols and
356 patch their types! */
358 for (ii = 0; ii < stabs->count; ++ii)
360 name = stabs->stab[ii];
361 pp = (char *) strchr (name, ':');
362 gdb_assert (pp); /* Must find a ':' or game's over. */
366 pp = (char *) strchr (pp, ':');
368 sym = find_symbol_in_list (symbols, name, pp - name);
371 /* FIXME-maybe: it would be nice if we noticed whether
372 the variable was defined *anywhere*, not just whether
373 it is defined in this compilation unit. But neither
374 xlc or GCC seem to need such a definition, and until
375 we do psymtabs (so that the minimal symbols from all
376 compilation units are available now), I'm not sure
377 how to get the information. */
379 /* On xcoff, if a global is defined and never referenced,
380 ld will remove it from the executable. There is then
381 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
382 sym = allocate_symbol (objfile);
383 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
384 SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
385 SYMBOL_SET_LINKAGE_NAME
386 (sym, obstack_copy0 (&objfile->objfile_obstack,
389 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
391 /* I don't think the linker does this with functions,
392 so as far as I know this is never executed.
393 But it doesn't hurt to check. */
395 lookup_function_type (read_type (&pp, objfile));
399 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
401 add_symbol_to_list (sym, &global_symbols);
406 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
409 lookup_function_type (read_type (&pp, objfile));
413 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
421 /* Read a number by which a type is referred to in dbx data,
422 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
423 Just a single number N is equivalent to (0,N).
424 Return the two numbers by storing them in the vector TYPENUMS.
425 TYPENUMS will then be used as an argument to dbx_lookup_type.
427 Returns 0 for success, -1 for error. */
430 read_type_number (char **pp, int *typenums)
437 typenums[0] = read_huge_number (pp, ',', &nbits, 0);
440 typenums[1] = read_huge_number (pp, ')', &nbits, 0);
447 typenums[1] = read_huge_number (pp, 0, &nbits, 0);
455 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
456 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
457 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
458 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
460 /* Structure for storing pointers to reference definitions for fast lookup
461 during "process_later". */
470 #define MAX_CHUNK_REFS 100
471 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
472 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
474 static struct ref_map *ref_map;
476 /* Ptr to free cell in chunk's linked list. */
477 static int ref_count = 0;
479 /* Number of chunks malloced. */
480 static int ref_chunk = 0;
482 /* This file maintains a cache of stabs aliases found in the symbol
483 table. If the symbol table changes, this cache must be cleared
484 or we are left holding onto data in invalid obstacks. */
486 stabsread_clear_cache (void)
492 /* Create array of pointers mapping refids to symbols and stab strings.
493 Add pointers to reference definition symbols and/or their values as we
494 find them, using their reference numbers as our index.
495 These will be used later when we resolve references. */
497 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
501 if (refnum >= ref_count)
502 ref_count = refnum + 1;
503 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
505 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
506 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
508 ref_map = (struct ref_map *)
509 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
510 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
511 new_chunks * REF_CHUNK_SIZE);
512 ref_chunk += new_chunks;
514 ref_map[refnum].stabs = stabs;
515 ref_map[refnum].sym = sym;
516 ref_map[refnum].value = value;
519 /* Return defined sym for the reference REFNUM. */
521 ref_search (int refnum)
523 if (refnum < 0 || refnum > ref_count)
525 return ref_map[refnum].sym;
528 /* Parse a reference id in STRING and return the resulting
529 reference number. Move STRING beyond the reference id. */
532 process_reference (char **string)
540 /* Advance beyond the initial '#'. */
543 /* Read number as reference id. */
544 while (*p && isdigit (*p))
546 refnum = refnum * 10 + *p - '0';
553 /* If STRING defines a reference, store away a pointer to the reference
554 definition for later use. Return the reference number. */
557 symbol_reference_defined (char **string)
562 refnum = process_reference (&p);
564 /* Defining symbols end in '='. */
567 /* Symbol is being defined here. */
573 /* Must be a reference. Either the symbol has already been defined,
574 or this is a forward reference to it. */
581 stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
583 int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));
585 if (regno >= gdbarch_num_regs (gdbarch)
586 + gdbarch_num_pseudo_regs (gdbarch))
588 reg_value_complaint (regno,
589 gdbarch_num_regs (gdbarch)
590 + gdbarch_num_pseudo_regs (gdbarch),
591 SYMBOL_PRINT_NAME (sym));
593 regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless. */
599 static const struct symbol_register_ops stab_register_funcs = {
603 /* The "aclass" indices for computed symbols. */
605 static int stab_register_index;
606 static int stab_regparm_index;
609 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
610 struct objfile *objfile)
612 struct gdbarch *gdbarch = get_objfile_arch (objfile);
614 char *p = (char *) find_name_end (string);
618 char *new_name = NULL;
620 /* We would like to eliminate nameless symbols, but keep their types.
621 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
622 to type 2, but, should not create a symbol to address that type. Since
623 the symbol will be nameless, there is no way any user can refer to it. */
627 /* Ignore syms with empty names. */
631 /* Ignore old-style symbols from cc -go. */
641 complaint (&symfile_complaints,
642 _("Bad stabs string '%s'"), string);
647 /* If a nameless stab entry, all we need is the type, not the symbol.
648 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
649 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
651 current_symbol = sym = allocate_symbol (objfile);
653 switch (type & N_TYPE)
656 SYMBOL_SECTION (sym) = SECT_OFF_TEXT (objfile);
659 SYMBOL_SECTION (sym) = SECT_OFF_DATA (objfile);
662 SYMBOL_SECTION (sym) = SECT_OFF_BSS (objfile);
666 if (processing_gcc_compilation)
668 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
669 number of bytes occupied by a type or object, which we ignore. */
670 SYMBOL_LINE (sym) = desc;
674 SYMBOL_LINE (sym) = 0; /* unknown */
677 if (is_cplus_marker (string[0]))
679 /* Special GNU C++ names. */
683 SYMBOL_SET_LINKAGE_NAME (sym, "this");
686 case 'v': /* $vtbl_ptr_type */
690 SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
694 /* This was an anonymous type that was never fixed up. */
698 /* SunPRO (3.0 at least) static variable encoding. */
699 if (gdbarch_static_transform_name_p (gdbarch))
701 /* ... fall through ... */
704 complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
706 goto normal; /* Do *something* with it. */
712 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
713 &objfile->objfile_obstack);
714 if (SYMBOL_LANGUAGE (sym) == language_cplus)
716 char *name = alloca (p - string + 1);
718 memcpy (name, string, p - string);
719 name[p - string] = '\0';
720 new_name = cp_canonicalize_string (name);
722 if (new_name != NULL)
724 SYMBOL_SET_NAMES (sym, new_name, strlen (new_name), 1, objfile);
728 SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);
730 if (SYMBOL_LANGUAGE (sym) == language_cplus)
731 cp_scan_for_anonymous_namespaces (sym, objfile);
736 /* Determine the type of name being defined. */
738 /* Getting GDB to correctly skip the symbol on an undefined symbol
739 descriptor and not ever dump core is a very dodgy proposition if
740 we do things this way. I say the acorn RISC machine can just
741 fix their compiler. */
742 /* The Acorn RISC machine's compiler can put out locals that don't
743 start with "234=" or "(3,4)=", so assume anything other than the
744 deftypes we know how to handle is a local. */
745 if (!strchr ("cfFGpPrStTvVXCR", *p))
747 if (isdigit (*p) || *p == '(' || *p == '-')
756 /* c is a special case, not followed by a type-number.
757 SYMBOL:c=iVALUE for an integer constant symbol.
758 SYMBOL:c=rVALUE for a floating constant symbol.
759 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
760 e.g. "b:c=e6,0" for "const b = blob1"
761 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
764 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
765 SYMBOL_TYPE (sym) = error_type (&p, objfile);
766 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
767 add_symbol_to_list (sym, &file_symbols);
777 struct type *dbl_type;
779 /* FIXME-if-picky-about-floating-accuracy: Should be using
780 target arithmetic to get the value. real.c in GCC
781 probably has the necessary code. */
783 dbl_type = objfile_type (objfile)->builtin_double;
785 obstack_alloc (&objfile->objfile_obstack,
786 TYPE_LENGTH (dbl_type));
787 store_typed_floating (dbl_valu, dbl_type, d);
789 SYMBOL_TYPE (sym) = dbl_type;
790 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
791 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
796 /* Defining integer constants this way is kind of silly,
797 since 'e' constants allows the compiler to give not
798 only the value, but the type as well. C has at least
799 int, long, unsigned int, and long long as constant
800 types; other languages probably should have at least
801 unsigned as well as signed constants. */
803 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
804 SYMBOL_VALUE (sym) = atoi (p);
805 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
811 SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
812 SYMBOL_VALUE (sym) = atoi (p);
813 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
819 struct type *range_type;
822 gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
823 gdb_byte *string_value;
825 if (quote != '\'' && quote != '"')
827 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
828 SYMBOL_TYPE (sym) = error_type (&p, objfile);
829 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
830 add_symbol_to_list (sym, &file_symbols);
834 /* Find matching quote, rejecting escaped quotes. */
835 while (*p && *p != quote)
837 if (*p == '\\' && p[1] == quote)
839 string_local[ind] = (gdb_byte) quote;
845 string_local[ind] = (gdb_byte) (*p);
852 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
853 SYMBOL_TYPE (sym) = error_type (&p, objfile);
854 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
855 add_symbol_to_list (sym, &file_symbols);
859 /* NULL terminate the string. */
860 string_local[ind] = 0;
862 = create_range_type (NULL,
863 objfile_type (objfile)->builtin_int,
865 SYMBOL_TYPE (sym) = create_array_type (NULL,
866 objfile_type (objfile)->builtin_char,
868 string_value = obstack_alloc (&objfile->objfile_obstack, ind + 1);
869 memcpy (string_value, string_local, ind + 1);
872 SYMBOL_VALUE_BYTES (sym) = string_value;
873 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
878 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
879 can be represented as integral.
880 e.g. "b:c=e6,0" for "const b = blob1"
881 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
883 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
884 SYMBOL_TYPE (sym) = read_type (&p, objfile);
888 SYMBOL_TYPE (sym) = error_type (&p, objfile);
893 /* If the value is too big to fit in an int (perhaps because
894 it is unsigned), or something like that, we silently get
895 a bogus value. The type and everything else about it is
896 correct. Ideally, we should be using whatever we have
897 available for parsing unsigned and long long values,
899 SYMBOL_VALUE (sym) = atoi (p);
904 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
905 SYMBOL_TYPE (sym) = error_type (&p, objfile);
908 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
909 add_symbol_to_list (sym, &file_symbols);
913 /* The name of a caught exception. */
914 SYMBOL_TYPE (sym) = read_type (&p, objfile);
915 SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
916 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
917 SYMBOL_VALUE_ADDRESS (sym) = valu;
918 add_symbol_to_list (sym, &local_symbols);
922 /* A static function definition. */
923 SYMBOL_TYPE (sym) = read_type (&p, objfile);
924 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
925 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
926 add_symbol_to_list (sym, &file_symbols);
927 /* fall into process_function_types. */
929 process_function_types:
930 /* Function result types are described as the result type in stabs.
931 We need to convert this to the function-returning-type-X type
932 in GDB. E.g. "int" is converted to "function returning int". */
933 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
934 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
936 /* All functions in C++ have prototypes. Stabs does not offer an
937 explicit way to identify prototyped or unprototyped functions,
938 but both GCC and Sun CC emit stabs for the "call-as" type rather
939 than the "declared-as" type for unprototyped functions, so
940 we treat all functions as if they were prototyped. This is used
941 primarily for promotion when calling the function from GDB. */
942 TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;
944 /* fall into process_prototype_types. */
946 process_prototype_types:
947 /* Sun acc puts declared types of arguments here. */
950 struct type *ftype = SYMBOL_TYPE (sym);
955 /* Obtain a worst case guess for the number of arguments
956 by counting the semicolons. */
963 /* Allocate parameter information fields and fill them in. */
964 TYPE_FIELDS (ftype) = (struct field *)
965 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
970 /* A type number of zero indicates the start of varargs.
971 FIXME: GDB currently ignores vararg functions. */
972 if (p[0] == '0' && p[1] == '\0')
974 ptype = read_type (&p, objfile);
976 /* The Sun compilers mark integer arguments, which should
977 be promoted to the width of the calling conventions, with
978 a type which references itself. This type is turned into
979 a TYPE_CODE_VOID type by read_type, and we have to turn
980 it back into builtin_int here.
981 FIXME: Do we need a new builtin_promoted_int_arg ? */
982 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
983 ptype = objfile_type (objfile)->builtin_int;
984 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
985 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
987 TYPE_NFIELDS (ftype) = nparams;
988 TYPE_PROTOTYPED (ftype) = 1;
993 /* A global function definition. */
994 SYMBOL_TYPE (sym) = read_type (&p, objfile);
995 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
996 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
997 add_symbol_to_list (sym, &global_symbols);
998 goto process_function_types;
1001 /* For a class G (global) symbol, it appears that the
1002 value is not correct. It is necessary to search for the
1003 corresponding linker definition to find the value.
1004 These definitions appear at the end of the namelist. */
1005 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1006 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1007 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1008 /* Don't add symbol references to global_sym_chain.
1009 Symbol references don't have valid names and wont't match up with
1010 minimal symbols when the global_sym_chain is relocated.
1011 We'll fixup symbol references when we fixup the defining symbol. */
1012 if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
1014 i = hashname (SYMBOL_LINKAGE_NAME (sym));
1015 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1016 global_sym_chain[i] = sym;
1018 add_symbol_to_list (sym, &global_symbols);
1021 /* This case is faked by a conditional above,
1022 when there is no code letter in the dbx data.
1023 Dbx data never actually contains 'l'. */
1026 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1027 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1028 SYMBOL_VALUE (sym) = valu;
1029 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1030 add_symbol_to_list (sym, &local_symbols);
1035 /* pF is a two-letter code that means a function parameter in Fortran.
1036 The type-number specifies the type of the return value.
1037 Translate it into a pointer-to-function type. */
1041 = lookup_pointer_type
1042 (lookup_function_type (read_type (&p, objfile)));
1045 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1047 SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
1048 SYMBOL_VALUE (sym) = valu;
1049 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1050 SYMBOL_IS_ARGUMENT (sym) = 1;
1051 add_symbol_to_list (sym, &local_symbols);
1053 if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
1055 /* On little-endian machines, this crud is never necessary,
1056 and, if the extra bytes contain garbage, is harmful. */
1060 /* If it's gcc-compiled, if it says `short', believe it. */
1061 if (processing_gcc_compilation
1062 || gdbarch_believe_pcc_promotion (gdbarch))
1065 if (!gdbarch_believe_pcc_promotion (gdbarch))
1067 /* If PCC says a parameter is a short or a char, it is
1069 if (TYPE_LENGTH (SYMBOL_TYPE (sym))
1070 < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
1071 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1074 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1075 ? objfile_type (objfile)->builtin_unsigned_int
1076 : objfile_type (objfile)->builtin_int;
1082 /* acc seems to use P to declare the prototypes of functions that
1083 are referenced by this file. gdb is not prepared to deal
1084 with this extra information. FIXME, it ought to. */
1087 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1088 goto process_prototype_types;
1093 /* Parameter which is in a register. */
1094 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1095 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1096 SYMBOL_IS_ARGUMENT (sym) = 1;
1097 SYMBOL_VALUE (sym) = valu;
1098 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1099 add_symbol_to_list (sym, &local_symbols);
1103 /* Register variable (either global or local). */
1104 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1105 SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
1106 SYMBOL_VALUE (sym) = valu;
1107 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1108 if (within_function)
1110 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1111 the same name to represent an argument passed in a
1112 register. GCC uses 'P' for the same case. So if we find
1113 such a symbol pair we combine it into one 'P' symbol.
1114 For Sun cc we need to do this regardless of
1115 stabs_argument_has_addr, because the compiler puts out
1116 the 'p' symbol even if it never saves the argument onto
1119 On most machines, we want to preserve both symbols, so
1120 that we can still get information about what is going on
1121 with the stack (VAX for computing args_printed, using
1122 stack slots instead of saved registers in backtraces,
1125 Note that this code illegally combines
1126 main(argc) struct foo argc; { register struct foo argc; }
1127 but this case is considered pathological and causes a warning
1128 from a decent compiler. */
1131 && local_symbols->nsyms > 0
1132 && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
1134 struct symbol *prev_sym;
1136 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1137 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1138 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1139 && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
1140 SYMBOL_LINKAGE_NAME (sym)) == 0)
1142 SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
1143 /* Use the type from the LOC_REGISTER; that is the type
1144 that is actually in that register. */
1145 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1146 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1151 add_symbol_to_list (sym, &local_symbols);
1154 add_symbol_to_list (sym, &file_symbols);
1158 /* Static symbol at top level of file. */
1159 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1160 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1161 SYMBOL_VALUE_ADDRESS (sym) = valu;
1162 if (gdbarch_static_transform_name_p (gdbarch)
1163 && gdbarch_static_transform_name (gdbarch,
1164 SYMBOL_LINKAGE_NAME (sym))
1165 != SYMBOL_LINKAGE_NAME (sym))
1167 struct minimal_symbol *msym;
1169 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1173 const char *new_name = gdbarch_static_transform_name
1174 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1176 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1177 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1180 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1181 add_symbol_to_list (sym, &file_symbols);
1185 /* In Ada, there is no distinction between typedef and non-typedef;
1186 any type declaration implicitly has the equivalent of a typedef,
1187 and thus 't' is in fact equivalent to 'Tt'.
1189 Therefore, for Ada units, we check the character immediately
1190 before the 't', and if we do not find a 'T', then make sure to
1191 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1192 will be stored in the VAR_DOMAIN). If the symbol was indeed
1193 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1194 elsewhere, so we don't need to take care of that.
1196 This is important to do, because of forward references:
1197 The cleanup of undefined types stored in undef_types only uses
1198 STRUCT_DOMAIN symbols to perform the replacement. */
1199 synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');
1202 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1204 /* For a nameless type, we don't want a create a symbol, thus we
1205 did not use `sym'. Return without further processing. */
1209 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1210 SYMBOL_VALUE (sym) = valu;
1211 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1212 /* C++ vagaries: we may have a type which is derived from
1213 a base type which did not have its name defined when the
1214 derived class was output. We fill in the derived class's
1215 base part member's name here in that case. */
1216 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1217 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1218 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1219 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1223 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1224 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1225 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1226 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1229 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1231 /* gcc-2.6 or later (when using -fvtable-thunks)
1232 emits a unique named type for a vtable entry.
1233 Some gdb code depends on that specific name. */
1234 extern const char vtbl_ptr_name[];
1236 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1237 && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
1238 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1240 /* If we are giving a name to a type such as "pointer to
1241 foo" or "function returning foo", we better not set
1242 the TYPE_NAME. If the program contains "typedef char
1243 *caddr_t;", we don't want all variables of type char
1244 * to print as caddr_t. This is not just a
1245 consequence of GDB's type management; PCC and GCC (at
1246 least through version 2.4) both output variables of
1247 either type char * or caddr_t with the type number
1248 defined in the 't' symbol for caddr_t. If a future
1249 compiler cleans this up it GDB is not ready for it
1250 yet, but if it becomes ready we somehow need to
1251 disable this check (without breaking the PCC/GCC2.4
1256 Fortunately, this check seems not to be necessary
1257 for anything except pointers or functions. */
1258 /* ezannoni: 2000-10-26. This seems to apply for
1259 versions of gcc older than 2.8. This was the original
1260 problem: with the following code gdb would tell that
1261 the type for name1 is caddr_t, and func is char().
1263 typedef char *caddr_t;
1275 /* Pascal accepts names for pointer types. */
1276 if (current_subfile->language == language_pascal)
1278 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1282 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
1285 add_symbol_to_list (sym, &file_symbols);
1289 /* Create the STRUCT_DOMAIN clone. */
1290 struct symbol *struct_sym = allocate_symbol (objfile);
1293 SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
1294 SYMBOL_VALUE (struct_sym) = valu;
1295 SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
1296 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1297 TYPE_NAME (SYMBOL_TYPE (sym))
1298 = obconcat (&objfile->objfile_obstack,
1299 SYMBOL_LINKAGE_NAME (sym),
1301 add_symbol_to_list (struct_sym, &file_symbols);
1307 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1308 by 't' which means we are typedef'ing it as well. */
1309 synonym = *p == 't';
1314 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1316 /* For a nameless type, we don't want a create a symbol, thus we
1317 did not use `sym'. Return without further processing. */
1321 SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
1322 SYMBOL_VALUE (sym) = valu;
1323 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
1324 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1325 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1326 = obconcat (&objfile->objfile_obstack,
1327 SYMBOL_LINKAGE_NAME (sym),
1329 add_symbol_to_list (sym, &file_symbols);
1333 /* Clone the sym and then modify it. */
1334 struct symbol *typedef_sym = allocate_symbol (objfile);
1336 *typedef_sym = *sym;
1337 SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
1338 SYMBOL_VALUE (typedef_sym) = valu;
1339 SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
1340 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1341 TYPE_NAME (SYMBOL_TYPE (sym))
1342 = obconcat (&objfile->objfile_obstack,
1343 SYMBOL_LINKAGE_NAME (sym),
1345 add_symbol_to_list (typedef_sym, &file_symbols);
1350 /* Static symbol of local scope. */
1351 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1352 SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
1353 SYMBOL_VALUE_ADDRESS (sym) = valu;
1354 if (gdbarch_static_transform_name_p (gdbarch)
1355 && gdbarch_static_transform_name (gdbarch,
1356 SYMBOL_LINKAGE_NAME (sym))
1357 != SYMBOL_LINKAGE_NAME (sym))
1359 struct minimal_symbol *msym;
1361 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
1365 const char *new_name = gdbarch_static_transform_name
1366 (gdbarch, SYMBOL_LINKAGE_NAME (sym));
1368 SYMBOL_SET_LINKAGE_NAME (sym, new_name);
1369 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1372 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1373 add_symbol_to_list (sym, &local_symbols);
1377 /* Reference parameter */
1378 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1379 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1380 SYMBOL_IS_ARGUMENT (sym) = 1;
1381 SYMBOL_VALUE (sym) = valu;
1382 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1383 add_symbol_to_list (sym, &local_symbols);
1387 /* Reference parameter which is in a register. */
1388 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1389 SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
1390 SYMBOL_IS_ARGUMENT (sym) = 1;
1391 SYMBOL_VALUE (sym) = valu;
1392 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1393 add_symbol_to_list (sym, &local_symbols);
1397 /* This is used by Sun FORTRAN for "function result value".
1398 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1399 that Pascal uses it too, but when I tried it Pascal used
1400 "x:3" (local symbol) instead. */
1401 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1402 SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
1403 SYMBOL_VALUE (sym) = valu;
1404 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1405 add_symbol_to_list (sym, &local_symbols);
1409 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1410 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
1411 SYMBOL_VALUE (sym) = 0;
1412 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1413 add_symbol_to_list (sym, &file_symbols);
1417 /* Some systems pass variables of certain types by reference instead
1418 of by value, i.e. they will pass the address of a structure (in a
1419 register or on the stack) instead of the structure itself. */
1421 if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
1422 && SYMBOL_IS_ARGUMENT (sym))
1424 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1425 variables passed in a register). */
1426 if (SYMBOL_CLASS (sym) == LOC_REGISTER)
1427 SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
1428 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1429 and subsequent arguments on SPARC, for example). */
1430 else if (SYMBOL_CLASS (sym) == LOC_ARG)
1431 SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
1437 /* Skip rest of this symbol and return an error type.
1439 General notes on error recovery: error_type always skips to the
1440 end of the symbol (modulo cretinous dbx symbol name continuation).
1441 Thus code like this:
1443 if (*(*pp)++ != ';')
1444 return error_type (pp, objfile);
1446 is wrong because if *pp starts out pointing at '\0' (typically as the
1447 result of an earlier error), it will be incremented to point to the
1448 start of the next symbol, which might produce strange results, at least
1449 if you run off the end of the string table. Instead use
1452 return error_type (pp, objfile);
1458 foo = error_type (pp, objfile);
1462 And in case it isn't obvious, the point of all this hair is so the compiler
1463 can define new types and new syntaxes, and old versions of the
1464 debugger will be able to read the new symbol tables. */
1466 static struct type *
1467 error_type (char **pp, struct objfile *objfile)
1469 complaint (&symfile_complaints,
1470 _("couldn't parse type; debugger out of date?"));
1473 /* Skip to end of symbol. */
1474 while (**pp != '\0')
1479 /* Check for and handle cretinous dbx symbol name continuation! */
1480 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
1482 *pp = next_symbol_text (objfile);
1489 return objfile_type (objfile)->builtin_error;
1493 /* Read type information or a type definition; return the type. Even
1494 though this routine accepts either type information or a type
1495 definition, the distinction is relevant--some parts of stabsread.c
1496 assume that type information starts with a digit, '-', or '(' in
1497 deciding whether to call read_type. */
1499 static struct type *
1500 read_type (char **pp, struct objfile *objfile)
1502 struct type *type = 0;
1505 char type_descriptor;
1507 /* Size in bits of type if specified by a type attribute, or -1 if
1508 there is no size attribute. */
1511 /* Used to distinguish string and bitstring from char-array and set. */
1514 /* Used to distinguish vector from array. */
1517 /* Read type number if present. The type number may be omitted.
1518 for instance in a two-dimensional array declared with type
1519 "ar1;1;10;ar1;1;10;4". */
1520 if ((**pp >= '0' && **pp <= '9')
1524 if (read_type_number (pp, typenums) != 0)
1525 return error_type (pp, objfile);
1529 /* Type is not being defined here. Either it already
1530 exists, or this is a forward reference to it.
1531 dbx_alloc_type handles both cases. */
1532 type = dbx_alloc_type (typenums, objfile);
1534 /* If this is a forward reference, arrange to complain if it
1535 doesn't get patched up by the time we're done
1537 if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
1538 add_undefined_type (type, typenums);
1543 /* Type is being defined here. */
1545 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1550 /* 'typenums=' not present, type is anonymous. Read and return
1551 the definition, but don't put it in the type vector. */
1552 typenums[0] = typenums[1] = -1;
1557 type_descriptor = (*pp)[-1];
1558 switch (type_descriptor)
1562 enum type_code code;
1564 /* Used to index through file_symbols. */
1565 struct pending *ppt;
1568 /* Name including "struct", etc. */
1572 char *from, *to, *p, *q1, *q2;
1574 /* Set the type code according to the following letter. */
1578 code = TYPE_CODE_STRUCT;
1581 code = TYPE_CODE_UNION;
1584 code = TYPE_CODE_ENUM;
1588 /* Complain and keep going, so compilers can invent new
1589 cross-reference types. */
1590 complaint (&symfile_complaints,
1591 _("Unrecognized cross-reference type `%c'"),
1593 code = TYPE_CODE_STRUCT;
1598 q1 = strchr (*pp, '<');
1599 p = strchr (*pp, ':');
1601 return error_type (pp, objfile);
1602 if (q1 && p > q1 && p[1] == ':')
1604 int nesting_level = 0;
1606 for (q2 = q1; *q2; q2++)
1610 else if (*q2 == '>')
1612 else if (*q2 == ':' && nesting_level == 0)
1617 return error_type (pp, objfile);
1620 if (current_subfile->language == language_cplus)
1622 char *new_name, *name = alloca (p - *pp + 1);
1624 memcpy (name, *pp, p - *pp);
1625 name[p - *pp] = '\0';
1626 new_name = cp_canonicalize_string (name);
1627 if (new_name != NULL)
1629 type_name = obstack_copy0 (&objfile->objfile_obstack,
1630 new_name, strlen (new_name));
1634 if (type_name == NULL)
1636 to = type_name = (char *)
1637 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);
1639 /* Copy the name. */
1646 /* Set the pointer ahead of the name which we just read, and
1651 /* If this type has already been declared, then reuse the same
1652 type, rather than allocating a new one. This saves some
1655 for (ppt = file_symbols; ppt; ppt = ppt->next)
1656 for (i = 0; i < ppt->nsyms; i++)
1658 struct symbol *sym = ppt->symbol[i];
1660 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
1661 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
1662 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
1663 && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
1665 obstack_free (&objfile->objfile_obstack, type_name);
1666 type = SYMBOL_TYPE (sym);
1667 if (typenums[0] != -1)
1668 *dbx_lookup_type (typenums, objfile) = type;
1673 /* Didn't find the type to which this refers, so we must
1674 be dealing with a forward reference. Allocate a type
1675 structure for it, and keep track of it so we can
1676 fill in the rest of the fields when we get the full
1678 type = dbx_alloc_type (typenums, objfile);
1679 TYPE_CODE (type) = code;
1680 TYPE_TAG_NAME (type) = type_name;
1681 INIT_CPLUS_SPECIFIC (type);
1682 TYPE_STUB (type) = 1;
1684 add_undefined_type (type, typenums);
1688 case '-': /* RS/6000 built-in type */
1702 /* We deal with something like t(1,2)=(3,4)=... which
1703 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1705 /* Allocate and enter the typedef type first.
1706 This handles recursive types. */
1707 type = dbx_alloc_type (typenums, objfile);
1708 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
1710 struct type *xtype = read_type (pp, objfile);
1714 /* It's being defined as itself. That means it is "void". */
1715 TYPE_CODE (type) = TYPE_CODE_VOID;
1716 TYPE_LENGTH (type) = 1;
1718 else if (type_size >= 0 || is_string)
1720 /* This is the absolute wrong way to construct types. Every
1721 other debug format has found a way around this problem and
1722 the related problems with unnecessarily stubbed types;
1723 someone motivated should attempt to clean up the issue
1724 here as well. Once a type pointed to has been created it
1725 should not be modified.
1727 Well, it's not *absolutely* wrong. Constructing recursive
1728 types (trees, linked lists) necessarily entails modifying
1729 types after creating them. Constructing any loop structure
1730 entails side effects. The Dwarf 2 reader does handle this
1731 more gracefully (it never constructs more than once
1732 instance of a type object, so it doesn't have to copy type
1733 objects wholesale), but it still mutates type objects after
1734 other folks have references to them.
1736 Keep in mind that this circularity/mutation issue shows up
1737 at the source language level, too: C's "incomplete types",
1738 for example. So the proper cleanup, I think, would be to
1739 limit GDB's type smashing to match exactly those required
1740 by the source language. So GDB could have a
1741 "complete_this_type" function, but never create unnecessary
1742 copies of a type otherwise. */
1743 replace_type (type, xtype);
1744 TYPE_NAME (type) = NULL;
1745 TYPE_TAG_NAME (type) = NULL;
1749 TYPE_TARGET_STUB (type) = 1;
1750 TYPE_TARGET_TYPE (type) = xtype;
1755 /* In the following types, we must be sure to overwrite any existing
1756 type that the typenums refer to, rather than allocating a new one
1757 and making the typenums point to the new one. This is because there
1758 may already be pointers to the existing type (if it had been
1759 forward-referenced), and we must change it to a pointer, function,
1760 reference, or whatever, *in-place*. */
1762 case '*': /* Pointer to another type */
1763 type1 = read_type (pp, objfile);
1764 type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
1767 case '&': /* Reference to another type */
1768 type1 = read_type (pp, objfile);
1769 type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
1772 case 'f': /* Function returning another type */
1773 type1 = read_type (pp, objfile);
1774 type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
1777 case 'g': /* Prototyped function. (Sun) */
1779 /* Unresolved questions:
1781 - According to Sun's ``STABS Interface Manual'', for 'f'
1782 and 'F' symbol descriptors, a `0' in the argument type list
1783 indicates a varargs function. But it doesn't say how 'g'
1784 type descriptors represent that info. Someone with access
1785 to Sun's toolchain should try it out.
1787 - According to the comment in define_symbol (search for
1788 `process_prototype_types:'), Sun emits integer arguments as
1789 types which ref themselves --- like `void' types. Do we
1790 have to deal with that here, too? Again, someone with
1791 access to Sun's toolchain should try it out and let us
1794 const char *type_start = (*pp) - 1;
1795 struct type *return_type = read_type (pp, objfile);
1796 struct type *func_type
1797 = make_function_type (return_type,
1798 dbx_lookup_type (typenums, objfile));
1801 struct type_list *next;
1805 while (**pp && **pp != '#')
1807 struct type *arg_type = read_type (pp, objfile);
1808 struct type_list *new = alloca (sizeof (*new));
1809 new->type = arg_type;
1810 new->next = arg_types;
1818 complaint (&symfile_complaints,
1819 _("Prototyped function type didn't "
1820 "end arguments with `#':\n%s"),
1824 /* If there is just one argument whose type is `void', then
1825 that's just an empty argument list. */
1827 && ! arg_types->next
1828 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
1831 TYPE_FIELDS (func_type)
1832 = (struct field *) TYPE_ALLOC (func_type,
1833 num_args * sizeof (struct field));
1834 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
1837 struct type_list *t;
1839 /* We stuck each argument type onto the front of the list
1840 when we read it, so the list is reversed. Build the
1841 fields array right-to-left. */
1842 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
1843 TYPE_FIELD_TYPE (func_type, i) = t->type;
1845 TYPE_NFIELDS (func_type) = num_args;
1846 TYPE_PROTOTYPED (func_type) = 1;
1852 case 'k': /* Const qualifier on some type (Sun) */
1853 type = read_type (pp, objfile);
1854 type = make_cv_type (1, TYPE_VOLATILE (type), type,
1855 dbx_lookup_type (typenums, objfile));
1858 case 'B': /* Volatile qual on some type (Sun) */
1859 type = read_type (pp, objfile);
1860 type = make_cv_type (TYPE_CONST (type), 1, type,
1861 dbx_lookup_type (typenums, objfile));
1865 if (isdigit (**pp) || **pp == '(' || **pp == '-')
1866 { /* Member (class & variable) type */
1867 /* FIXME -- we should be doing smash_to_XXX types here. */
1869 struct type *domain = read_type (pp, objfile);
1870 struct type *memtype;
1873 /* Invalid member type data format. */
1874 return error_type (pp, objfile);
1877 memtype = read_type (pp, objfile);
1878 type = dbx_alloc_type (typenums, objfile);
1879 smash_to_memberptr_type (type, domain, memtype);
1882 /* type attribute */
1886 /* Skip to the semicolon. */
1887 while (**pp != ';' && **pp != '\0')
1890 return error_type (pp, objfile);
1892 ++ * pp; /* Skip the semicolon. */
1896 case 's': /* Size attribute */
1897 type_size = atoi (attr + 1);
1902 case 'S': /* String attribute */
1903 /* FIXME: check to see if following type is array? */
1907 case 'V': /* Vector attribute */
1908 /* FIXME: check to see if following type is array? */
1913 /* Ignore unrecognized type attributes, so future compilers
1914 can invent new ones. */
1922 case '#': /* Method (class & fn) type */
1923 if ((*pp)[0] == '#')
1925 /* We'll get the parameter types from the name. */
1926 struct type *return_type;
1929 return_type = read_type (pp, objfile);
1930 if (*(*pp)++ != ';')
1931 complaint (&symfile_complaints,
1932 _("invalid (minimal) member type "
1933 "data format at symtab pos %d."),
1935 type = allocate_stub_method (return_type);
1936 if (typenums[0] != -1)
1937 *dbx_lookup_type (typenums, objfile) = type;
1941 struct type *domain = read_type (pp, objfile);
1942 struct type *return_type;
1947 /* Invalid member type data format. */
1948 return error_type (pp, objfile);
1952 return_type = read_type (pp, objfile);
1953 args = read_args (pp, ';', objfile, &nargs, &varargs);
1955 return error_type (pp, objfile);
1956 type = dbx_alloc_type (typenums, objfile);
1957 smash_to_method_type (type, domain, return_type, args,
1962 case 'r': /* Range type */
1963 type = read_range_type (pp, typenums, type_size, objfile);
1964 if (typenums[0] != -1)
1965 *dbx_lookup_type (typenums, objfile) = type;
1970 /* Sun ACC builtin int type */
1971 type = read_sun_builtin_type (pp, typenums, objfile);
1972 if (typenums[0] != -1)
1973 *dbx_lookup_type (typenums, objfile) = type;
1977 case 'R': /* Sun ACC builtin float type */
1978 type = read_sun_floating_type (pp, typenums, objfile);
1979 if (typenums[0] != -1)
1980 *dbx_lookup_type (typenums, objfile) = type;
1983 case 'e': /* Enumeration type */
1984 type = dbx_alloc_type (typenums, objfile);
1985 type = read_enum_type (pp, type, objfile);
1986 if (typenums[0] != -1)
1987 *dbx_lookup_type (typenums, objfile) = type;
1990 case 's': /* Struct type */
1991 case 'u': /* Union type */
1993 enum type_code type_code = TYPE_CODE_UNDEF;
1994 type = dbx_alloc_type (typenums, objfile);
1995 switch (type_descriptor)
1998 type_code = TYPE_CODE_STRUCT;
2001 type_code = TYPE_CODE_UNION;
2004 type = read_struct_type (pp, type, type_code, objfile);
2008 case 'a': /* Array type */
2010 return error_type (pp, objfile);
2013 type = dbx_alloc_type (typenums, objfile);
2014 type = read_array_type (pp, type, objfile);
2016 TYPE_CODE (type) = TYPE_CODE_STRING;
2018 make_vector_type (type);
2021 case 'S': /* Set type */
2022 type1 = read_type (pp, objfile);
2023 type = create_set_type ((struct type *) NULL, type1);
2024 if (typenums[0] != -1)
2025 *dbx_lookup_type (typenums, objfile) = type;
2029 --*pp; /* Go back to the symbol in error. */
2030 /* Particularly important if it was \0! */
2031 return error_type (pp, objfile);
2036 warning (_("GDB internal error, type is NULL in stabsread.c."));
2037 return error_type (pp, objfile);
2040 /* Size specified in a type attribute overrides any other size. */
2041 if (type_size != -1)
2042 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2047 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2048 Return the proper type node for a given builtin type number. */
2050 static const struct objfile_data *rs6000_builtin_type_data;
2052 static struct type *
2053 rs6000_builtin_type (int typenum, struct objfile *objfile)
2055 struct type **negative_types = objfile_data (objfile,
2056 rs6000_builtin_type_data);
2058 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2059 #define NUMBER_RECOGNIZED 34
2060 struct type *rettype = NULL;
2062 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2064 complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
2065 return objfile_type (objfile)->builtin_error;
2068 if (!negative_types)
2070 /* This includes an empty slot for type number -0. */
2071 negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
2072 NUMBER_RECOGNIZED + 1, struct type *);
2073 set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
2076 if (negative_types[-typenum] != NULL)
2077 return negative_types[-typenum];
2079 #if TARGET_CHAR_BIT != 8
2080 #error This code wrong for TARGET_CHAR_BIT not 8
2081 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2082 that if that ever becomes not true, the correct fix will be to
2083 make the size in the struct type to be in bits, not in units of
2090 /* The size of this and all the other types are fixed, defined
2091 by the debugging format. If there is a type called "int" which
2092 is other than 32 bits, then it should use a new negative type
2093 number (or avoid negative type numbers for that case).
2094 See stabs.texinfo. */
2095 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", objfile);
2098 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", objfile);
2101 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", objfile);
2104 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", objfile);
2107 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
2108 "unsigned char", objfile);
2111 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", objfile);
2114 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
2115 "unsigned short", objfile);
2118 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2119 "unsigned int", objfile);
2122 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2123 "unsigned", objfile);
2126 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2127 "unsigned long", objfile);
2130 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", objfile);
2133 /* IEEE single precision (32 bit). */
2134 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", objfile);
2137 /* IEEE double precision (64 bit). */
2138 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", objfile);
2141 /* This is an IEEE double on the RS/6000, and different machines with
2142 different sizes for "long double" should use different negative
2143 type numbers. See stabs.texinfo. */
2144 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", objfile);
2147 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", objfile);
2150 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2151 "boolean", objfile);
2154 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", objfile);
2157 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", objfile);
2160 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", objfile);
2163 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2164 "character", objfile);
2167 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2168 "logical*1", objfile);
2171 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2172 "logical*2", objfile);
2175 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2176 "logical*4", objfile);
2179 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2180 "logical", objfile);
2183 /* Complex type consisting of two IEEE single precision values. */
2184 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", objfile);
2185 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2189 /* Complex type consisting of two IEEE double precision values. */
2190 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2191 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2195 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", objfile);
2198 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", objfile);
2201 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", objfile);
2204 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", objfile);
2207 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", objfile);
2210 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2211 "unsigned long long", objfile);
2214 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2215 "logical*8", objfile);
2218 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", objfile);
2221 negative_types[-typenum] = rettype;
2225 /* This page contains subroutines of read_type. */
2227 /* Wrapper around method_name_from_physname to flag a complaint
2228 if there is an error. */
2231 stabs_method_name_from_physname (const char *physname)
2235 method_name = method_name_from_physname (physname);
2237 if (method_name == NULL)
2239 complaint (&symfile_complaints,
2240 _("Method has bad physname %s\n"), physname);
2247 /* Read member function stabs info for C++ classes. The form of each member
2250 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2252 An example with two member functions is:
2254 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2256 For the case of overloaded operators, the format is op$::*.funcs, where
2257 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2258 name (such as `+=') and `.' marks the end of the operator name.
2260 Returns 1 for success, 0 for failure. */
2263 read_member_functions (struct field_info *fip, char **pp, struct type *type,
2264 struct objfile *objfile)
2271 struct next_fnfield *next;
2272 struct fn_field fn_field;
2275 struct type *look_ahead_type;
2276 struct next_fnfieldlist *new_fnlist;
2277 struct next_fnfield *new_sublist;
2281 /* Process each list until we find something that is not a member function
2282 or find the end of the functions. */
2286 /* We should be positioned at the start of the function name.
2287 Scan forward to find the first ':' and if it is not the
2288 first of a "::" delimiter, then this is not a member function. */
2300 look_ahead_type = NULL;
2303 new_fnlist = (struct next_fnfieldlist *)
2304 xmalloc (sizeof (struct next_fnfieldlist));
2305 make_cleanup (xfree, new_fnlist);
2306 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
2308 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
2310 /* This is a completely wierd case. In order to stuff in the
2311 names that might contain colons (the usual name delimiter),
2312 Mike Tiemann defined a different name format which is
2313 signalled if the identifier is "op$". In that case, the
2314 format is "op$::XXXX." where XXXX is the name. This is
2315 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2316 /* This lets the user type "break operator+".
2317 We could just put in "+" as the name, but that wouldn't
2319 static char opname[32] = "op$";
2320 char *o = opname + 3;
2322 /* Skip past '::'. */
2325 STABS_CONTINUE (pp, objfile);
2331 main_fn_name = savestring (opname, o - opname);
2337 main_fn_name = savestring (*pp, p - *pp);
2338 /* Skip past '::'. */
2341 new_fnlist->fn_fieldlist.name = main_fn_name;
2346 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
2347 make_cleanup (xfree, new_sublist);
2348 memset (new_sublist, 0, sizeof (struct next_fnfield));
2350 /* Check for and handle cretinous dbx symbol name continuation! */
2351 if (look_ahead_type == NULL)
2354 STABS_CONTINUE (pp, objfile);
2356 new_sublist->fn_field.type = read_type (pp, objfile);
2359 /* Invalid symtab info for member function. */
2365 /* g++ version 1 kludge */
2366 new_sublist->fn_field.type = look_ahead_type;
2367 look_ahead_type = NULL;
2377 /* If this is just a stub, then we don't have the real name here. */
2379 if (TYPE_STUB (new_sublist->fn_field.type))
2381 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
2382 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
2383 new_sublist->fn_field.is_stub = 1;
2385 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
2388 /* Set this member function's visibility fields. */
2391 case VISIBILITY_PRIVATE:
2392 new_sublist->fn_field.is_private = 1;
2394 case VISIBILITY_PROTECTED:
2395 new_sublist->fn_field.is_protected = 1;
2399 STABS_CONTINUE (pp, objfile);
2402 case 'A': /* Normal functions. */
2403 new_sublist->fn_field.is_const = 0;
2404 new_sublist->fn_field.is_volatile = 0;
2407 case 'B': /* `const' member functions. */
2408 new_sublist->fn_field.is_const = 1;
2409 new_sublist->fn_field.is_volatile = 0;
2412 case 'C': /* `volatile' member function. */
2413 new_sublist->fn_field.is_const = 0;
2414 new_sublist->fn_field.is_volatile = 1;
2417 case 'D': /* `const volatile' member function. */
2418 new_sublist->fn_field.is_const = 1;
2419 new_sublist->fn_field.is_volatile = 1;
2422 case '*': /* File compiled with g++ version 1 --
2428 complaint (&symfile_complaints,
2429 _("const/volatile indicator missing, got '%c'"),
2439 /* virtual member function, followed by index.
2440 The sign bit is set to distinguish pointers-to-methods
2441 from virtual function indicies. Since the array is
2442 in words, the quantity must be shifted left by 1
2443 on 16 bit machine, and by 2 on 32 bit machine, forcing
2444 the sign bit out, and usable as a valid index into
2445 the array. Remove the sign bit here. */
2446 new_sublist->fn_field.voffset =
2447 (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
2451 STABS_CONTINUE (pp, objfile);
2452 if (**pp == ';' || **pp == '\0')
2454 /* Must be g++ version 1. */
2455 new_sublist->fn_field.fcontext = 0;
2459 /* Figure out from whence this virtual function came.
2460 It may belong to virtual function table of
2461 one of its baseclasses. */
2462 look_ahead_type = read_type (pp, objfile);
2465 /* g++ version 1 overloaded methods. */
2469 new_sublist->fn_field.fcontext = look_ahead_type;
2478 look_ahead_type = NULL;
2484 /* static member function. */
2486 int slen = strlen (main_fn_name);
2488 new_sublist->fn_field.voffset = VOFFSET_STATIC;
2490 /* For static member functions, we can't tell if they
2491 are stubbed, as they are put out as functions, and not as
2493 GCC v2 emits the fully mangled name if
2494 dbxout.c:flag_minimal_debug is not set, so we have to
2495 detect a fully mangled physname here and set is_stub
2496 accordingly. Fully mangled physnames in v2 start with
2497 the member function name, followed by two underscores.
2498 GCC v3 currently always emits stubbed member functions,
2499 but with fully mangled physnames, which start with _Z. */
2500 if (!(strncmp (new_sublist->fn_field.physname,
2501 main_fn_name, slen) == 0
2502 && new_sublist->fn_field.physname[slen] == '_'
2503 && new_sublist->fn_field.physname[slen + 1] == '_'))
2505 new_sublist->fn_field.is_stub = 1;
2512 complaint (&symfile_complaints,
2513 _("member function type missing, got '%c'"),
2515 /* Fall through into normal member function. */
2518 /* normal member function. */
2519 new_sublist->fn_field.voffset = 0;
2520 new_sublist->fn_field.fcontext = 0;
2524 new_sublist->next = sublist;
2525 sublist = new_sublist;
2527 STABS_CONTINUE (pp, objfile);
2529 while (**pp != ';' && **pp != '\0');
2532 STABS_CONTINUE (pp, objfile);
2534 /* Skip GCC 3.X member functions which are duplicates of the callable
2535 constructor/destructor. */
2536 if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
2537 || strcmp_iw (main_fn_name, "__base_dtor ") == 0
2538 || strcmp (main_fn_name, "__deleting_dtor") == 0)
2540 xfree (main_fn_name);
2545 int has_destructor = 0, has_other = 0;
2547 struct next_fnfield *tmp_sublist;
2549 /* Various versions of GCC emit various mostly-useless
2550 strings in the name field for special member functions.
2552 For stub methods, we need to defer correcting the name
2553 until we are ready to unstub the method, because the current
2554 name string is used by gdb_mangle_name. The only stub methods
2555 of concern here are GNU v2 operators; other methods have their
2556 names correct (see caveat below).
2558 For non-stub methods, in GNU v3, we have a complete physname.
2559 Therefore we can safely correct the name now. This primarily
2560 affects constructors and destructors, whose name will be
2561 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2562 operators will also have incorrect names; for instance,
2563 "operator int" will be named "operator i" (i.e. the type is
2566 For non-stub methods in GNU v2, we have no easy way to
2567 know if we have a complete physname or not. For most
2568 methods the result depends on the platform (if CPLUS_MARKER
2569 can be `$' or `.', it will use minimal debug information, or
2570 otherwise the full physname will be included).
2572 Rather than dealing with this, we take a different approach.
2573 For v3 mangled names, we can use the full physname; for v2,
2574 we use cplus_demangle_opname (which is actually v2 specific),
2575 because the only interesting names are all operators - once again
2576 barring the caveat below. Skip this process if any method in the
2577 group is a stub, to prevent our fouling up the workings of
2580 The caveat: GCC 2.95.x (and earlier?) put constructors and
2581 destructors in the same method group. We need to split this
2582 into two groups, because they should have different names.
2583 So for each method group we check whether it contains both
2584 routines whose physname appears to be a destructor (the physnames
2585 for and destructors are always provided, due to quirks in v2
2586 mangling) and routines whose physname does not appear to be a
2587 destructor. If so then we break up the list into two halves.
2588 Even if the constructors and destructors aren't in the same group
2589 the destructor will still lack the leading tilde, so that also
2592 So, to summarize what we expect and handle here:
2594 Given Given Real Real Action
2595 method name physname physname method name
2597 __opi [none] __opi__3Foo operator int opname
2599 Foo _._3Foo _._3Foo ~Foo separate and
2601 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2602 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2605 tmp_sublist = sublist;
2606 while (tmp_sublist != NULL)
2608 if (tmp_sublist->fn_field.is_stub)
2610 if (tmp_sublist->fn_field.physname[0] == '_'
2611 && tmp_sublist->fn_field.physname[1] == 'Z')
2614 if (is_destructor_name (tmp_sublist->fn_field.physname))
2619 tmp_sublist = tmp_sublist->next;
2622 if (has_destructor && has_other)
2624 struct next_fnfieldlist *destr_fnlist;
2625 struct next_fnfield *last_sublist;
2627 /* Create a new fn_fieldlist for the destructors. */
2629 destr_fnlist = (struct next_fnfieldlist *)
2630 xmalloc (sizeof (struct next_fnfieldlist));
2631 make_cleanup (xfree, destr_fnlist);
2632 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
2633 destr_fnlist->fn_fieldlist.name
2634 = obconcat (&objfile->objfile_obstack, "~",
2635 new_fnlist->fn_fieldlist.name, (char *) NULL);
2637 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2638 obstack_alloc (&objfile->objfile_obstack,
2639 sizeof (struct fn_field) * has_destructor);
2640 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
2641 sizeof (struct fn_field) * has_destructor);
2642 tmp_sublist = sublist;
2643 last_sublist = NULL;
2645 while (tmp_sublist != NULL)
2647 if (!is_destructor_name (tmp_sublist->fn_field.physname))
2649 tmp_sublist = tmp_sublist->next;
2653 destr_fnlist->fn_fieldlist.fn_fields[i++]
2654 = tmp_sublist->fn_field;
2656 last_sublist->next = tmp_sublist->next;
2658 sublist = tmp_sublist->next;
2659 last_sublist = tmp_sublist;
2660 tmp_sublist = tmp_sublist->next;
2663 destr_fnlist->fn_fieldlist.length = has_destructor;
2664 destr_fnlist->next = fip->fnlist;
2665 fip->fnlist = destr_fnlist;
2667 length -= has_destructor;
2671 /* v3 mangling prevents the use of abbreviated physnames,
2672 so we can do this here. There are stubbed methods in v3
2674 - in -gstabs instead of -gstabs+
2675 - or for static methods, which are output as a function type
2676 instead of a method type. */
2677 char *new_method_name =
2678 stabs_method_name_from_physname (sublist->fn_field.physname);
2680 if (new_method_name != NULL
2681 && strcmp (new_method_name,
2682 new_fnlist->fn_fieldlist.name) != 0)
2684 new_fnlist->fn_fieldlist.name = new_method_name;
2685 xfree (main_fn_name);
2688 xfree (new_method_name);
2690 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
2692 new_fnlist->fn_fieldlist.name =
2693 obconcat (&objfile->objfile_obstack,
2694 "~", main_fn_name, (char *)NULL);
2695 xfree (main_fn_name);
2699 char dem_opname[256];
2702 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2703 dem_opname, DMGL_ANSI);
2705 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
2708 new_fnlist->fn_fieldlist.name
2709 = obstack_copy0 (&objfile->objfile_obstack,
2710 dem_opname, strlen (dem_opname));
2711 xfree (main_fn_name);
2714 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
2715 obstack_alloc (&objfile->objfile_obstack,
2716 sizeof (struct fn_field) * length);
2717 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
2718 sizeof (struct fn_field) * length);
2719 for (i = length; (i--, sublist); sublist = sublist->next)
2721 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
2724 new_fnlist->fn_fieldlist.length = length;
2725 new_fnlist->next = fip->fnlist;
2726 fip->fnlist = new_fnlist;
2733 ALLOCATE_CPLUS_STRUCT_TYPE (type);
2734 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
2735 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
2736 memset (TYPE_FN_FIELDLISTS (type), 0,
2737 sizeof (struct fn_fieldlist) * nfn_fields);
2738 TYPE_NFN_FIELDS (type) = nfn_fields;
2744 /* Special GNU C++ name.
2746 Returns 1 for success, 0 for failure. "failure" means that we can't
2747 keep parsing and it's time for error_type(). */
2750 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
2751 struct objfile *objfile)
2756 struct type *context;
2766 /* At this point, *pp points to something like "22:23=*22...",
2767 where the type number before the ':' is the "context" and
2768 everything after is a regular type definition. Lookup the
2769 type, find it's name, and construct the field name. */
2771 context = read_type (pp, objfile);
2775 case 'f': /* $vf -- a virtual function table pointer */
2776 name = type_name_no_tag (context);
2781 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2782 vptr_name, name, (char *) NULL);
2785 case 'b': /* $vb -- a virtual bsomethingorother */
2786 name = type_name_no_tag (context);
2789 complaint (&symfile_complaints,
2790 _("C++ abbreviated type name "
2791 "unknown at symtab pos %d"),
2795 fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
2796 name, (char *) NULL);
2800 invalid_cpp_abbrev_complaint (*pp);
2801 fip->list->field.name = obconcat (&objfile->objfile_obstack,
2802 "INVALID_CPLUSPLUS_ABBREV",
2807 /* At this point, *pp points to the ':'. Skip it and read the
2813 invalid_cpp_abbrev_complaint (*pp);
2816 fip->list->field.type = read_type (pp, objfile);
2818 (*pp)++; /* Skip the comma. */
2825 SET_FIELD_BITPOS (fip->list->field,
2826 read_huge_number (pp, ';', &nbits, 0));
2830 /* This field is unpacked. */
2831 FIELD_BITSIZE (fip->list->field) = 0;
2832 fip->list->visibility = VISIBILITY_PRIVATE;
2836 invalid_cpp_abbrev_complaint (*pp);
2837 /* We have no idea what syntax an unrecognized abbrev would have, so
2838 better return 0. If we returned 1, we would need to at least advance
2839 *pp to avoid an infinite loop. */
2846 read_one_struct_field (struct field_info *fip, char **pp, char *p,
2847 struct type *type, struct objfile *objfile)
2849 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2851 fip->list->field.name =
2852 obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
2855 /* This means we have a visibility for a field coming. */
2859 fip->list->visibility = *(*pp)++;
2863 /* normal dbx-style format, no explicit visibility */
2864 fip->list->visibility = VISIBILITY_PUBLIC;
2867 fip->list->field.type = read_type (pp, objfile);
2872 /* Possible future hook for nested types. */
2875 fip->list->field.bitpos = (long) -2; /* nested type */
2885 /* Static class member. */
2886 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
2890 else if (**pp != ',')
2892 /* Bad structure-type format. */
2893 stabs_general_complaint ("bad structure-type format");
2897 (*pp)++; /* Skip the comma. */
2902 SET_FIELD_BITPOS (fip->list->field,
2903 read_huge_number (pp, ',', &nbits, 0));
2906 stabs_general_complaint ("bad structure-type format");
2909 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
2912 stabs_general_complaint ("bad structure-type format");
2917 if (FIELD_BITPOS (fip->list->field) == 0
2918 && FIELD_BITSIZE (fip->list->field) == 0)
2920 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2921 it is a field which has been optimized out. The correct stab for
2922 this case is to use VISIBILITY_IGNORE, but that is a recent
2923 invention. (2) It is a 0-size array. For example
2924 union { int num; char str[0]; } foo. Printing _("<no value>" for
2925 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2926 will continue to work, and a 0-size array as a whole doesn't
2927 have any contents to print.
2929 I suspect this probably could also happen with gcc -gstabs (not
2930 -gstabs+) for static fields, and perhaps other C++ extensions.
2931 Hopefully few people use -gstabs with gdb, since it is intended
2932 for dbx compatibility. */
2934 /* Ignore this field. */
2935 fip->list->visibility = VISIBILITY_IGNORE;
2939 /* Detect an unpacked field and mark it as such.
2940 dbx gives a bit size for all fields.
2941 Note that forward refs cannot be packed,
2942 and treat enums as if they had the width of ints. */
2944 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
2946 if (TYPE_CODE (field_type) != TYPE_CODE_INT
2947 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
2948 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
2949 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
2951 FIELD_BITSIZE (fip->list->field) = 0;
2953 if ((FIELD_BITSIZE (fip->list->field)
2954 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
2955 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
2956 && FIELD_BITSIZE (fip->list->field)
2957 == gdbarch_int_bit (gdbarch))
2960 FIELD_BITPOS (fip->list->field) % 8 == 0)
2962 FIELD_BITSIZE (fip->list->field) = 0;
2968 /* Read struct or class data fields. They have the form:
2970 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2972 At the end, we see a semicolon instead of a field.
2974 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2977 The optional VISIBILITY is one of:
2979 '/0' (VISIBILITY_PRIVATE)
2980 '/1' (VISIBILITY_PROTECTED)
2981 '/2' (VISIBILITY_PUBLIC)
2982 '/9' (VISIBILITY_IGNORE)
2984 or nothing, for C style fields with public visibility.
2986 Returns 1 for success, 0 for failure. */
2989 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
2990 struct objfile *objfile)
2993 struct nextfield *new;
2995 /* We better set p right now, in case there are no fields at all... */
2999 /* Read each data member type until we find the terminating ';' at the end of
3000 the data member list, or break for some other reason such as finding the
3001 start of the member function list. */
3002 /* Stab string for structure/union does not end with two ';' in
3003 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3005 while (**pp != ';' && **pp != '\0')
3007 STABS_CONTINUE (pp, objfile);
3008 /* Get space to record the next field's data. */
3009 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3010 make_cleanup (xfree, new);
3011 memset (new, 0, sizeof (struct nextfield));
3012 new->next = fip->list;
3015 /* Get the field name. */
3018 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3019 unless the CPLUS_MARKER is followed by an underscore, in
3020 which case it is just the name of an anonymous type, which we
3021 should handle like any other type name. */
3023 if (is_cplus_marker (p[0]) && p[1] != '_')
3025 if (!read_cpp_abbrev (fip, pp, type, objfile))
3030 /* Look for the ':' that separates the field name from the field
3031 values. Data members are delimited by a single ':', while member
3032 functions are delimited by a pair of ':'s. When we hit the member
3033 functions (if any), terminate scan loop and return. */
3035 while (*p != ':' && *p != '\0')
3042 /* Check to see if we have hit the member functions yet. */
3047 read_one_struct_field (fip, pp, p, type, objfile);
3049 if (p[0] == ':' && p[1] == ':')
3051 /* (the deleted) chill the list of fields: the last entry (at
3052 the head) is a partially constructed entry which we now
3054 fip->list = fip->list->next;
3059 /* The stabs for C++ derived classes contain baseclass information which
3060 is marked by a '!' character after the total size. This function is
3061 called when we encounter the baseclass marker, and slurps up all the
3062 baseclass information.
3064 Immediately following the '!' marker is the number of base classes that
3065 the class is derived from, followed by information for each base class.
3066 For each base class, there are two visibility specifiers, a bit offset
3067 to the base class information within the derived class, a reference to
3068 the type for the base class, and a terminating semicolon.
3070 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3072 Baseclass information marker __________________|| | | | | | |
3073 Number of baseclasses __________________________| | | | | | |
3074 Visibility specifiers (2) ________________________| | | | | |
3075 Offset in bits from start of class _________________| | | | |
3076 Type number for base class ___________________________| | | |
3077 Visibility specifiers (2) _______________________________| | |
3078 Offset in bits from start of class ________________________| |
3079 Type number of base class ____________________________________|
3081 Return 1 for success, 0 for (error-type-inducing) failure. */
3087 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3088 struct objfile *objfile)
3091 struct nextfield *new;
3099 /* Skip the '!' baseclass information marker. */
3103 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3107 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
3113 /* Some stupid compilers have trouble with the following, so break
3114 it up into simpler expressions. */
3115 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3116 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3119 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3122 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3123 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3127 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3129 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3131 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3132 make_cleanup (xfree, new);
3133 memset (new, 0, sizeof (struct nextfield));
3134 new->next = fip->list;
3136 FIELD_BITSIZE (new->field) = 0; /* This should be an unpacked
3139 STABS_CONTINUE (pp, objfile);
3143 /* Nothing to do. */
3146 SET_TYPE_FIELD_VIRTUAL (type, i);
3149 /* Unknown character. Complain and treat it as non-virtual. */
3151 complaint (&symfile_complaints,
3152 _("Unknown virtual character `%c' for baseclass"),
3158 new->visibility = *(*pp)++;
3159 switch (new->visibility)
3161 case VISIBILITY_PRIVATE:
3162 case VISIBILITY_PROTECTED:
3163 case VISIBILITY_PUBLIC:
3166 /* Bad visibility format. Complain and treat it as
3169 complaint (&symfile_complaints,
3170 _("Unknown visibility `%c' for baseclass"),
3172 new->visibility = VISIBILITY_PUBLIC;
3179 /* The remaining value is the bit offset of the portion of the object
3180 corresponding to this baseclass. Always zero in the absence of
3181 multiple inheritance. */
3183 SET_FIELD_BITPOS (new->field, read_huge_number (pp, ',', &nbits, 0));
3188 /* The last piece of baseclass information is the type of the
3189 base class. Read it, and remember it's type name as this
3192 new->field.type = read_type (pp, objfile);
3193 new->field.name = type_name_no_tag (new->field.type);
3195 /* Skip trailing ';' and bump count of number of fields seen. */
3204 /* The tail end of stabs for C++ classes that contain a virtual function
3205 pointer contains a tilde, a %, and a type number.
3206 The type number refers to the base class (possibly this class itself) which
3207 contains the vtable pointer for the current class.
3209 This function is called when we have parsed all the method declarations,
3210 so we can look for the vptr base class info. */
3213 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3214 struct objfile *objfile)
3218 STABS_CONTINUE (pp, objfile);
3220 /* If we are positioned at a ';', then skip it. */
3230 if (**pp == '=' || **pp == '+' || **pp == '-')
3232 /* Obsolete flags that used to indicate the presence
3233 of constructors and/or destructors. */
3237 /* Read either a '%' or the final ';'. */
3238 if (*(*pp)++ == '%')
3240 /* The next number is the type number of the base class
3241 (possibly our own class) which supplies the vtable for
3242 this class. Parse it out, and search that class to find
3243 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3244 and TYPE_VPTR_FIELDNO. */
3249 t = read_type (pp, objfile);
3251 while (*p != '\0' && *p != ';')
3257 /* Premature end of symbol. */
3261 TYPE_VPTR_BASETYPE (type) = t;
3262 if (type == t) /* Our own class provides vtbl ptr. */
3264 for (i = TYPE_NFIELDS (t) - 1;
3265 i >= TYPE_N_BASECLASSES (t);
3268 const char *name = TYPE_FIELD_NAME (t, i);
3270 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
3271 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
3273 TYPE_VPTR_FIELDNO (type) = i;
3277 /* Virtual function table field not found. */
3278 complaint (&symfile_complaints,
3279 _("virtual function table pointer "
3280 "not found when defining class `%s'"),
3286 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
3297 attach_fn_fields_to_type (struct field_info *fip, struct type *type)
3301 for (n = TYPE_NFN_FIELDS (type);
3302 fip->fnlist != NULL;
3303 fip->fnlist = fip->fnlist->next)
3305 --n; /* Circumvent Sun3 compiler bug. */
3306 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
3311 /* Create the vector of fields, and record how big it is.
3312 We need this info to record proper virtual function table information
3313 for this class's virtual functions. */
3316 attach_fields_to_type (struct field_info *fip, struct type *type,
3317 struct objfile *objfile)
3320 int non_public_fields = 0;
3321 struct nextfield *scan;
3323 /* Count up the number of fields that we have, as well as taking note of
3324 whether or not there are any non-public fields, which requires us to
3325 allocate and build the private_field_bits and protected_field_bits
3328 for (scan = fip->list; scan != NULL; scan = scan->next)
3331 if (scan->visibility != VISIBILITY_PUBLIC)
3333 non_public_fields++;
3337 /* Now we know how many fields there are, and whether or not there are any
3338 non-public fields. Record the field count, allocate space for the
3339 array of fields, and create blank visibility bitfields if necessary. */
3341 TYPE_NFIELDS (type) = nfields;
3342 TYPE_FIELDS (type) = (struct field *)
3343 TYPE_ALLOC (type, sizeof (struct field) * nfields);
3344 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
3346 if (non_public_fields)
3348 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3350 TYPE_FIELD_PRIVATE_BITS (type) =
3351 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3352 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
3354 TYPE_FIELD_PROTECTED_BITS (type) =
3355 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3356 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
3358 TYPE_FIELD_IGNORE_BITS (type) =
3359 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
3360 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
3363 /* Copy the saved-up fields into the field vector. Start from the
3364 head of the list, adding to the tail of the field array, so that
3365 they end up in the same order in the array in which they were
3366 added to the list. */
3368 while (nfields-- > 0)
3370 TYPE_FIELD (type, nfields) = fip->list->field;
3371 switch (fip->list->visibility)
3373 case VISIBILITY_PRIVATE:
3374 SET_TYPE_FIELD_PRIVATE (type, nfields);
3377 case VISIBILITY_PROTECTED:
3378 SET_TYPE_FIELD_PROTECTED (type, nfields);
3381 case VISIBILITY_IGNORE:
3382 SET_TYPE_FIELD_IGNORE (type, nfields);
3385 case VISIBILITY_PUBLIC:
3389 /* Unknown visibility. Complain and treat it as public. */
3391 complaint (&symfile_complaints,
3392 _("Unknown visibility `%c' for field"),
3393 fip->list->visibility);
3397 fip->list = fip->list->next;
3403 /* Complain that the compiler has emitted more than one definition for the
3404 structure type TYPE. */
3406 complain_about_struct_wipeout (struct type *type)
3408 const char *name = "";
3409 const char *kind = "";
3411 if (TYPE_TAG_NAME (type))
3413 name = TYPE_TAG_NAME (type);
3414 switch (TYPE_CODE (type))
3416 case TYPE_CODE_STRUCT: kind = "struct "; break;
3417 case TYPE_CODE_UNION: kind = "union "; break;
3418 case TYPE_CODE_ENUM: kind = "enum "; break;
3422 else if (TYPE_NAME (type))
3424 name = TYPE_NAME (type);
3433 complaint (&symfile_complaints,
3434 _("struct/union type gets multiply defined: %s%s"), kind, name);
3437 /* Set the length for all variants of a same main_type, which are
3438 connected in the closed chain.
3440 This is something that needs to be done when a type is defined *after*
3441 some cross references to this type have already been read. Consider
3442 for instance the following scenario where we have the following two
3445 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3446 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3448 A stubbed version of type dummy is created while processing the first
3449 stabs entry. The length of that type is initially set to zero, since
3450 it is unknown at this point. Also, a "constant" variation of type
3451 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3454 The second stabs entry allows us to replace the stubbed definition
3455 with the real definition. However, we still need to adjust the length
3456 of the "constant" variation of that type, as its length was left
3457 untouched during the main type replacement... */
3460 set_length_in_type_chain (struct type *type)
3462 struct type *ntype = TYPE_CHAIN (type);
3464 while (ntype != type)
3466 if (TYPE_LENGTH(ntype) == 0)
3467 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
3469 complain_about_struct_wipeout (ntype);
3470 ntype = TYPE_CHAIN (ntype);
3474 /* Read the description of a structure (or union type) and return an object
3475 describing the type.
3477 PP points to a character pointer that points to the next unconsumed token
3478 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3479 *PP will point to "4a:1,0,32;;".
3481 TYPE points to an incomplete type that needs to be filled in.
3483 OBJFILE points to the current objfile from which the stabs information is
3484 being read. (Note that it is redundant in that TYPE also contains a pointer
3485 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3488 static struct type *
3489 read_struct_type (char **pp, struct type *type, enum type_code type_code,
3490 struct objfile *objfile)
3492 struct cleanup *back_to;
3493 struct field_info fi;
3498 /* When describing struct/union/class types in stabs, G++ always drops
3499 all qualifications from the name. So if you've got:
3500 struct A { ... struct B { ... }; ... };
3501 then G++ will emit stabs for `struct A::B' that call it simply
3502 `struct B'. Obviously, if you've got a real top-level definition for
3503 `struct B', or other nested definitions, this is going to cause
3506 Obviously, GDB can't fix this by itself, but it can at least avoid
3507 scribbling on existing structure type objects when new definitions
3509 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
3510 || TYPE_STUB (type)))
3512 complain_about_struct_wipeout (type);
3514 /* It's probably best to return the type unchanged. */
3518 back_to = make_cleanup (null_cleanup, 0);
3520 INIT_CPLUS_SPECIFIC (type);
3521 TYPE_CODE (type) = type_code;
3522 TYPE_STUB (type) = 0;
3524 /* First comes the total size in bytes. */
3529 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
3531 return error_type (pp, objfile);
3532 set_length_in_type_chain (type);
3535 /* Now read the baseclasses, if any, read the regular C struct or C++
3536 class member fields, attach the fields to the type, read the C++
3537 member functions, attach them to the type, and then read any tilde
3538 field (baseclass specifier for the class holding the main vtable). */
3540 if (!read_baseclasses (&fi, pp, type, objfile)
3541 || !read_struct_fields (&fi, pp, type, objfile)
3542 || !attach_fields_to_type (&fi, type, objfile)
3543 || !read_member_functions (&fi, pp, type, objfile)
3544 || !attach_fn_fields_to_type (&fi, type)
3545 || !read_tilde_fields (&fi, pp, type, objfile))
3547 type = error_type (pp, objfile);
3550 do_cleanups (back_to);
3554 /* Read a definition of an array type,
3555 and create and return a suitable type object.
3556 Also creates a range type which represents the bounds of that
3559 static struct type *
3560 read_array_type (char **pp, struct type *type,
3561 struct objfile *objfile)
3563 struct type *index_type, *element_type, *range_type;
3568 /* Format of an array type:
3569 "ar<index type>;lower;upper;<array_contents_type>".
3570 OS9000: "arlower,upper;<array_contents_type>".
3572 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3573 for these, produce a type like float[][]. */
3576 index_type = read_type (pp, objfile);
3578 /* Improper format of array type decl. */
3579 return error_type (pp, objfile);
3583 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3588 lower = read_huge_number (pp, ';', &nbits, 0);
3591 return error_type (pp, objfile);
3593 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
3598 upper = read_huge_number (pp, ';', &nbits, 0);
3600 return error_type (pp, objfile);
3602 element_type = read_type (pp, objfile);
3611 create_range_type ((struct type *) NULL, index_type, lower, upper);
3612 type = create_array_type (type, element_type, range_type);
3618 /* Read a definition of an enumeration type,
3619 and create and return a suitable type object.
3620 Also defines the symbols that represent the values of the type. */
3622 static struct type *
3623 read_enum_type (char **pp, struct type *type,
3624 struct objfile *objfile)
3626 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3632 struct pending **symlist;
3633 struct pending *osyms, *syms;
3636 int unsigned_enum = 1;
3639 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3640 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3641 to do? For now, force all enum values to file scope. */
3642 if (within_function)
3643 symlist = &local_symbols;
3646 symlist = &file_symbols;
3648 o_nsyms = osyms ? osyms->nsyms : 0;
3650 /* The aix4 compiler emits an extra field before the enum members;
3651 my guess is it's a type of some sort. Just ignore it. */
3654 /* Skip over the type. */
3658 /* Skip over the colon. */
3662 /* Read the value-names and their values.
3663 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3664 A semicolon or comma instead of a NAME means the end. */
3665 while (**pp && **pp != ';' && **pp != ',')
3667 STABS_CONTINUE (pp, objfile);
3671 name = obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
3673 n = read_huge_number (pp, ',', &nbits, 0);
3675 return error_type (pp, objfile);
3677 sym = allocate_symbol (objfile);
3678 SYMBOL_SET_LINKAGE_NAME (sym, name);
3679 SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
3680 &objfile->objfile_obstack);
3681 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
3682 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
3683 SYMBOL_VALUE (sym) = n;
3686 add_symbol_to_list (sym, symlist);
3691 (*pp)++; /* Skip the semicolon. */
3693 /* Now fill in the fields of the type-structure. */
3695 TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
3696 set_length_in_type_chain (type);
3697 TYPE_CODE (type) = TYPE_CODE_ENUM;
3698 TYPE_STUB (type) = 0;
3700 TYPE_UNSIGNED (type) = 1;
3701 TYPE_NFIELDS (type) = nsyms;
3702 TYPE_FIELDS (type) = (struct field *)
3703 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
3704 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
3706 /* Find the symbols for the values and put them into the type.
3707 The symbols can be found in the symlist that we put them on
3708 to cause them to be defined. osyms contains the old value
3709 of that symlist; everything up to there was defined by us. */
3710 /* Note that we preserve the order of the enum constants, so
3711 that in something like "enum {FOO, LAST_THING=FOO}" we print
3712 FOO, not LAST_THING. */
3714 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
3716 int last = syms == osyms ? o_nsyms : 0;
3717 int j = syms->nsyms;
3719 for (; --j >= last; --n)
3721 struct symbol *xsym = syms->symbol[j];
3723 SYMBOL_TYPE (xsym) = type;
3724 TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
3725 SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
3726 TYPE_FIELD_BITSIZE (type, n) = 0;
3735 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3736 typedefs in every file (for int, long, etc):
3738 type = b <signed> <width> <format type>; <offset>; <nbits>
3740 optional format type = c or b for char or boolean.
3741 offset = offset from high order bit to start bit of type.
3742 width is # bytes in object of this type, nbits is # bits in type.
3744 The width/offset stuff appears to be for small objects stored in
3745 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3748 static struct type *
3749 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
3754 enum type_code code = TYPE_CODE_INT;
3765 return error_type (pp, objfile);
3769 /* For some odd reason, all forms of char put a c here. This is strange
3770 because no other type has this honor. We can safely ignore this because
3771 we actually determine 'char'acterness by the number of bits specified in
3773 Boolean forms, e.g Fortran logical*X, put a b here. */
3777 else if (**pp == 'b')
3779 code = TYPE_CODE_BOOL;
3783 /* The first number appears to be the number of bytes occupied
3784 by this type, except that unsigned short is 4 instead of 2.
3785 Since this information is redundant with the third number,
3786 we will ignore it. */
3787 read_huge_number (pp, ';', &nbits, 0);
3789 return error_type (pp, objfile);
3791 /* The second number is always 0, so ignore it too. */
3792 read_huge_number (pp, ';', &nbits, 0);
3794 return error_type (pp, objfile);
3796 /* The third number is the number of bits for this type. */
3797 type_bits = read_huge_number (pp, 0, &nbits, 0);
3799 return error_type (pp, objfile);
3800 /* The type *should* end with a semicolon. If it are embedded
3801 in a larger type the semicolon may be the only way to know where
3802 the type ends. If this type is at the end of the stabstring we
3803 can deal with the omitted semicolon (but we don't have to like
3804 it). Don't bother to complain(), Sun's compiler omits the semicolon
3810 return init_type (TYPE_CODE_VOID, 1,
3811 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3814 return init_type (code,
3815 type_bits / TARGET_CHAR_BIT,
3816 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
3820 static struct type *
3821 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
3826 struct type *rettype;
3828 /* The first number has more details about the type, for example
3830 details = read_huge_number (pp, ';', &nbits, 0);
3832 return error_type (pp, objfile);
3834 /* The second number is the number of bytes occupied by this type. */
3835 nbytes = read_huge_number (pp, ';', &nbits, 0);
3837 return error_type (pp, objfile);
3839 if (details == NF_COMPLEX || details == NF_COMPLEX16
3840 || details == NF_COMPLEX32)
3842 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
3843 TYPE_TARGET_TYPE (rettype)
3844 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
3848 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
3851 /* Read a number from the string pointed to by *PP.
3852 The value of *PP is advanced over the number.
3853 If END is nonzero, the character that ends the
3854 number must match END, or an error happens;
3855 and that character is skipped if it does match.
3856 If END is zero, *PP is left pointing to that character.
3858 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3859 the number is represented in an octal representation, assume that
3860 it is represented in a 2's complement representation with a size of
3861 TWOS_COMPLEMENT_BITS.
3863 If the number fits in a long, set *BITS to 0 and return the value.
3864 If not, set *BITS to be the number of bits in the number and return 0.
3866 If encounter garbage, set *BITS to -1 and return 0. */
3869 read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
3880 int twos_complement_representation = 0;
3888 /* Leading zero means octal. GCC uses this to output values larger
3889 than an int (because that would be hard in decimal). */
3896 /* Skip extra zeros. */
3900 if (sign > 0 && radix == 8 && twos_complement_bits > 0)
3902 /* Octal, possibly signed. Check if we have enough chars for a
3908 while ((c = *p1) >= '0' && c < '8')
3912 if (len > twos_complement_bits / 3
3913 || (twos_complement_bits % 3 == 0
3914 && len == twos_complement_bits / 3))
3916 /* Ok, we have enough characters for a signed value, check
3917 for signness by testing if the sign bit is set. */
3918 sign_bit = (twos_complement_bits % 3 + 2) % 3;
3920 if (c & (1 << sign_bit))
3922 /* Definitely signed. */
3923 twos_complement_representation = 1;
3929 upper_limit = LONG_MAX / radix;
3931 while ((c = *p++) >= '0' && c < ('0' + radix))
3933 if (n <= upper_limit)
3935 if (twos_complement_representation)
3937 /* Octal, signed, twos complement representation. In
3938 this case, n is the corresponding absolute value. */
3941 long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));
3953 /* unsigned representation */
3955 n += c - '0'; /* FIXME this overflows anyway. */
3961 /* This depends on large values being output in octal, which is
3968 /* Ignore leading zeroes. */
3972 else if (c == '2' || c == '3')
3993 if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
3995 /* We were supposed to parse a number with maximum
3996 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
4007 /* Large decimal constants are an error (because it is hard to
4008 count how many bits are in them). */
4014 /* -0x7f is the same as 0x80. So deal with it by adding one to
4015 the number of bits. Two's complement represention octals
4016 can't have a '-' in front. */
4017 if (sign == -1 && !twos_complement_representation)
4028 /* It's *BITS which has the interesting information. */
4032 static struct type *
4033 read_range_type (char **pp, int typenums[2], int type_size,
4034 struct objfile *objfile)
4036 struct gdbarch *gdbarch = get_objfile_arch (objfile);
4037 char *orig_pp = *pp;
4042 struct type *result_type;
4043 struct type *index_type = NULL;
4045 /* First comes a type we are a subrange of.
4046 In C it is usually 0, 1 or the type being defined. */
4047 if (read_type_number (pp, rangenums) != 0)
4048 return error_type (pp, objfile);
4049 self_subrange = (rangenums[0] == typenums[0] &&
4050 rangenums[1] == typenums[1]);
4055 index_type = read_type (pp, objfile);
4058 /* A semicolon should now follow; skip it. */
4062 /* The remaining two operands are usually lower and upper bounds
4063 of the range. But in some special cases they mean something else. */
4064 n2 = read_huge_number (pp, ';', &n2bits, type_size);
4065 n3 = read_huge_number (pp, ';', &n3bits, type_size);
4067 if (n2bits == -1 || n3bits == -1)
4068 return error_type (pp, objfile);
4071 goto handle_true_range;
4073 /* If limits are huge, must be large integral type. */
4074 if (n2bits != 0 || n3bits != 0)
4076 char got_signed = 0;
4077 char got_unsigned = 0;
4078 /* Number of bits in the type. */
4081 /* If a type size attribute has been specified, the bounds of
4082 the range should fit in this size. If the lower bounds needs
4083 more bits than the upper bound, then the type is signed. */
4084 if (n2bits <= type_size && n3bits <= type_size)
4086 if (n2bits == type_size && n2bits > n3bits)
4092 /* Range from 0 to <large number> is an unsigned large integral type. */
4093 else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4098 /* Range from <large number> to <large number>-1 is a large signed
4099 integral type. Take care of the case where <large number> doesn't
4100 fit in a long but <large number>-1 does. */
4101 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4102 || (n2bits != 0 && n3bits == 0
4103 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4110 if (got_signed || got_unsigned)
4112 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
4113 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
4117 return error_type (pp, objfile);
4120 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4121 if (self_subrange && n2 == 0 && n3 == 0)
4122 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4124 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4125 is the width in bytes.
4127 Fortran programs appear to use this for complex types also. To
4128 distinguish between floats and complex, g77 (and others?) seem
4129 to use self-subranges for the complexes, and subranges of int for
4132 Also note that for complexes, g77 sets n2 to the size of one of
4133 the member floats, not the whole complex beast. My guess is that
4134 this was to work well with pre-COMPLEX versions of gdb. */
4136 if (n3 == 0 && n2 > 0)
4138 struct type *float_type
4139 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
4143 struct type *complex_type =
4144 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
4146 TYPE_TARGET_TYPE (complex_type) = float_type;
4147 return complex_type;
4153 /* If the upper bound is -1, it must really be an unsigned integral. */
4155 else if (n2 == 0 && n3 == -1)
4157 int bits = type_size;
4161 /* We don't know its size. It is unsigned int or unsigned
4162 long. GCC 2.3.3 uses this for long long too, but that is
4163 just a GDB 3.5 compatibility hack. */
4164 bits = gdbarch_int_bit (gdbarch);
4167 return init_type (TYPE_CODE_INT, bits / TARGET_CHAR_BIT,
4168 TYPE_FLAG_UNSIGNED, NULL, objfile);
4171 /* Special case: char is defined (Who knows why) as a subrange of
4172 itself with range 0-127. */
4173 else if (self_subrange && n2 == 0 && n3 == 127)
4174 return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile);
4176 /* We used to do this only for subrange of self or subrange of int. */
4179 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4180 "unsigned long", and we already checked for that,
4181 so don't need to test for it here. */
4184 /* n3 actually gives the size. */
4185 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
4188 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4189 unsigned n-byte integer. But do require n to be a power of
4190 two; we don't want 3- and 5-byte integers flying around. */
4196 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4199 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4200 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4204 /* I think this is for Convex "long long". Since I don't know whether
4205 Convex sets self_subrange, I also accept that particular size regardless
4206 of self_subrange. */
4207 else if (n3 == 0 && n2 < 0
4209 || n2 == -gdbarch_long_long_bit
4210 (gdbarch) / TARGET_CHAR_BIT))
4211 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4212 else if (n2 == -n3 - 1)
4215 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4217 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4218 if (n3 == 0x7fffffff)
4219 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4222 /* We have a real range type on our hands. Allocate space and
4223 return a real pointer. */
4227 index_type = objfile_type (objfile)->builtin_int;
4229 index_type = *dbx_lookup_type (rangenums, objfile);
4230 if (index_type == NULL)
4232 /* Does this actually ever happen? Is that why we are worrying
4233 about dealing with it rather than just calling error_type? */
4235 complaint (&symfile_complaints,
4236 _("base type %d of range type is not defined"), rangenums[1]);
4238 index_type = objfile_type (objfile)->builtin_int;
4241 result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
4242 return (result_type);
4245 /* Read in an argument list. This is a list of types, separated by commas
4246 and terminated with END. Return the list of types read in, or NULL
4247 if there is an error. */
4249 static struct field *
4250 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
4253 /* FIXME! Remove this arbitrary limit! */
4254 struct type *types[1024]; /* Allow for fns of 1023 parameters. */
4261 /* Invalid argument list: no ','. */
4264 STABS_CONTINUE (pp, objfile);
4265 types[n++] = read_type (pp, objfile);
4267 (*pp)++; /* get past `end' (the ':' character). */
4271 /* We should read at least the THIS parameter here. Some broken stabs
4272 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4273 have been present ";-16,(0,43)" reference instead. This way the
4274 excessive ";" marker prematurely stops the parameters parsing. */
4276 complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
4279 else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
4287 rval = (struct field *) xmalloc (n * sizeof (struct field));
4288 memset (rval, 0, n * sizeof (struct field));
4289 for (i = 0; i < n; i++)
4290 rval[i].type = types[i];
4295 /* Common block handling. */
4297 /* List of symbols declared since the last BCOMM. This list is a tail
4298 of local_symbols. When ECOMM is seen, the symbols on the list
4299 are noted so their proper addresses can be filled in later,
4300 using the common block base address gotten from the assembler
4303 static struct pending *common_block;
4304 static int common_block_i;
4306 /* Name of the current common block. We get it from the BCOMM instead of the
4307 ECOMM to match IBM documentation (even though IBM puts the name both places
4308 like everyone else). */
4309 static char *common_block_name;
4311 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4312 to remain after this function returns. */
4315 common_block_start (char *name, struct objfile *objfile)
4317 if (common_block_name != NULL)
4319 complaint (&symfile_complaints,
4320 _("Invalid symbol data: common block within common block"));
4322 common_block = local_symbols;
4323 common_block_i = local_symbols ? local_symbols->nsyms : 0;
4324 common_block_name = obstack_copy0 (&objfile->objfile_obstack,
4325 name, strlen (name));
4328 /* Process a N_ECOMM symbol. */
4331 common_block_end (struct objfile *objfile)
4333 /* Symbols declared since the BCOMM are to have the common block
4334 start address added in when we know it. common_block and
4335 common_block_i point to the first symbol after the BCOMM in
4336 the local_symbols list; copy the list and hang it off the
4337 symbol for the common block name for later fixup. */
4340 struct pending *new = 0;
4341 struct pending *next;
4344 if (common_block_name == NULL)
4346 complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
4350 sym = allocate_symbol (objfile);
4351 /* Note: common_block_name already saved on objfile_obstack. */
4352 SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
4353 SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
4355 /* Now we copy all the symbols which have been defined since the BCOMM. */
4357 /* Copy all the struct pendings before common_block. */
4358 for (next = local_symbols;
4359 next != NULL && next != common_block;
4362 for (j = 0; j < next->nsyms; j++)
4363 add_symbol_to_list (next->symbol[j], &new);
4366 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4367 NULL, it means copy all the local symbols (which we already did
4370 if (common_block != NULL)
4371 for (j = common_block_i; j < common_block->nsyms; j++)
4372 add_symbol_to_list (common_block->symbol[j], &new);
4374 SYMBOL_TYPE (sym) = (struct type *) new;
4376 /* Should we be putting local_symbols back to what it was?
4379 i = hashname (SYMBOL_LINKAGE_NAME (sym));
4380 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
4381 global_sym_chain[i] = sym;
4382 common_block_name = NULL;
4385 /* Add a common block's start address to the offset of each symbol
4386 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4387 the common block name). */
4390 fix_common_block (struct symbol *sym, CORE_ADDR valu)
4392 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
4394 for (; next; next = next->next)
4398 for (j = next->nsyms - 1; j >= 0; j--)
4399 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
4405 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4406 See add_undefined_type for more details. */
4409 add_undefined_type_noname (struct type *type, int typenums[2])
4413 nat.typenums[0] = typenums [0];
4414 nat.typenums[1] = typenums [1];
4417 if (noname_undefs_length == noname_undefs_allocated)
4419 noname_undefs_allocated *= 2;
4420 noname_undefs = (struct nat *)
4421 xrealloc ((char *) noname_undefs,
4422 noname_undefs_allocated * sizeof (struct nat));
4424 noname_undefs[noname_undefs_length++] = nat;
4427 /* Add TYPE to the UNDEF_TYPES vector.
4428 See add_undefined_type for more details. */
4431 add_undefined_type_1 (struct type *type)
4433 if (undef_types_length == undef_types_allocated)
4435 undef_types_allocated *= 2;
4436 undef_types = (struct type **)
4437 xrealloc ((char *) undef_types,
4438 undef_types_allocated * sizeof (struct type *));
4440 undef_types[undef_types_length++] = type;
4443 /* What about types defined as forward references inside of a small lexical
4445 /* Add a type to the list of undefined types to be checked through
4446 once this file has been read in.
4448 In practice, we actually maintain two such lists: The first list
4449 (UNDEF_TYPES) is used for types whose name has been provided, and
4450 concerns forward references (eg 'xs' or 'xu' forward references);
4451 the second list (NONAME_UNDEFS) is used for types whose name is
4452 unknown at creation time, because they were referenced through
4453 their type number before the actual type was declared.
4454 This function actually adds the given type to the proper list. */
4457 add_undefined_type (struct type *type, int typenums[2])
4459 if (TYPE_TAG_NAME (type) == NULL)
4460 add_undefined_type_noname (type, typenums);
4462 add_undefined_type_1 (type);
4465 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4468 cleanup_undefined_types_noname (struct objfile *objfile)
4472 for (i = 0; i < noname_undefs_length; i++)
4474 struct nat nat = noname_undefs[i];
4477 type = dbx_lookup_type (nat.typenums, objfile);
4478 if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
4480 /* The instance flags of the undefined type are still unset,
4481 and needs to be copied over from the reference type.
4482 Since replace_type expects them to be identical, we need
4483 to set these flags manually before hand. */
4484 TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
4485 replace_type (nat.type, *type);
4489 noname_undefs_length = 0;
4492 /* Go through each undefined type, see if it's still undefined, and fix it
4493 up if possible. We have two kinds of undefined types:
4495 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4496 Fix: update array length using the element bounds
4497 and the target type's length.
4498 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4499 yet defined at the time a pointer to it was made.
4500 Fix: Do a full lookup on the struct/union tag. */
4503 cleanup_undefined_types_1 (void)
4507 /* Iterate over every undefined type, and look for a symbol whose type
4508 matches our undefined type. The symbol matches if:
4509 1. It is a typedef in the STRUCT domain;
4510 2. It has the same name, and same type code;
4511 3. The instance flags are identical.
4513 It is important to check the instance flags, because we have seen
4514 examples where the debug info contained definitions such as:
4516 "foo_t:t30=B31=xefoo_t:"
4518 In this case, we have created an undefined type named "foo_t" whose
4519 instance flags is null (when processing "xefoo_t"), and then created
4520 another type with the same name, but with different instance flags
4521 ('B' means volatile). I think that the definition above is wrong,
4522 since the same type cannot be volatile and non-volatile at the same
4523 time, but we need to be able to cope with it when it happens. The
4524 approach taken here is to treat these two types as different. */
4526 for (type = undef_types; type < undef_types + undef_types_length; type++)
4528 switch (TYPE_CODE (*type))
4531 case TYPE_CODE_STRUCT:
4532 case TYPE_CODE_UNION:
4533 case TYPE_CODE_ENUM:
4535 /* Check if it has been defined since. Need to do this here
4536 as well as in check_typedef to deal with the (legitimate in
4537 C though not C++) case of several types with the same name
4538 in different source files. */
4539 if (TYPE_STUB (*type))
4541 struct pending *ppt;
4543 /* Name of the type, without "struct" or "union". */
4544 const char *typename = TYPE_TAG_NAME (*type);
4546 if (typename == NULL)
4548 complaint (&symfile_complaints, _("need a type name"));
4551 for (ppt = file_symbols; ppt; ppt = ppt->next)
4553 for (i = 0; i < ppt->nsyms; i++)
4555 struct symbol *sym = ppt->symbol[i];
4557 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4558 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4559 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
4561 && (TYPE_INSTANCE_FLAGS (*type) ==
4562 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
4563 && strcmp (SYMBOL_LINKAGE_NAME (sym),
4565 replace_type (*type, SYMBOL_TYPE (sym));
4574 complaint (&symfile_complaints,
4575 _("forward-referenced types left unresolved, "
4583 undef_types_length = 0;
4586 /* Try to fix all the undefined types we ecountered while processing
4590 cleanup_undefined_stabs_types (struct objfile *objfile)
4592 cleanup_undefined_types_1 ();
4593 cleanup_undefined_types_noname (objfile);
4596 /* Scan through all of the global symbols defined in the object file,
4597 assigning values to the debugging symbols that need to be assigned
4598 to. Get these symbols from the minimal symbol table. */
4601 scan_file_globals (struct objfile *objfile)
4604 struct minimal_symbol *msymbol;
4605 struct symbol *sym, *prev;
4606 struct objfile *resolve_objfile;
4608 /* SVR4 based linkers copy referenced global symbols from shared
4609 libraries to the main executable.
4610 If we are scanning the symbols for a shared library, try to resolve
4611 them from the minimal symbols of the main executable first. */
4613 if (symfile_objfile && objfile != symfile_objfile)
4614 resolve_objfile = symfile_objfile;
4616 resolve_objfile = objfile;
4620 /* Avoid expensive loop through all minimal symbols if there are
4621 no unresolved symbols. */
4622 for (hash = 0; hash < HASHSIZE; hash++)
4624 if (global_sym_chain[hash])
4627 if (hash >= HASHSIZE)
4630 ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
4634 /* Skip static symbols. */
4635 switch (MSYMBOL_TYPE (msymbol))
4647 /* Get the hash index and check all the symbols
4648 under that hash index. */
4650 hash = hashname (SYMBOL_LINKAGE_NAME (msymbol));
4652 for (sym = global_sym_chain[hash]; sym;)
4654 if (strcmp (SYMBOL_LINKAGE_NAME (msymbol),
4655 SYMBOL_LINKAGE_NAME (sym)) == 0)
4657 /* Splice this symbol out of the hash chain and
4658 assign the value we have to it. */
4661 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
4665 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
4668 /* Check to see whether we need to fix up a common block. */
4669 /* Note: this code might be executed several times for
4670 the same symbol if there are multiple references. */
4673 if (SYMBOL_CLASS (sym) == LOC_BLOCK)
4675 fix_common_block (sym,
4676 SYMBOL_VALUE_ADDRESS (msymbol));
4680 SYMBOL_VALUE_ADDRESS (sym)
4681 = SYMBOL_VALUE_ADDRESS (msymbol);
4683 SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
4688 sym = SYMBOL_VALUE_CHAIN (prev);
4692 sym = global_sym_chain[hash];
4698 sym = SYMBOL_VALUE_CHAIN (sym);
4702 if (resolve_objfile == objfile)
4704 resolve_objfile = objfile;
4707 /* Change the storage class of any remaining unresolved globals to
4708 LOC_UNRESOLVED and remove them from the chain. */
4709 for (hash = 0; hash < HASHSIZE; hash++)
4711 sym = global_sym_chain[hash];
4715 sym = SYMBOL_VALUE_CHAIN (sym);
4717 /* Change the symbol address from the misleading chain value
4719 SYMBOL_VALUE_ADDRESS (prev) = 0;
4721 /* Complain about unresolved common block symbols. */
4722 if (SYMBOL_CLASS (prev) == LOC_STATIC)
4723 SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
4725 complaint (&symfile_complaints,
4726 _("%s: common block `%s' from "
4727 "global_sym_chain unresolved"),
4728 objfile->name, SYMBOL_PRINT_NAME (prev));
4731 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4734 /* Initialize anything that needs initializing when starting to read
4735 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4739 stabsread_init (void)
4743 /* Initialize anything that needs initializing when a completely new
4744 symbol file is specified (not just adding some symbols from another
4745 file, e.g. a shared library). */
4748 stabsread_new_init (void)
4750 /* Empty the hash table of global syms looking for values. */
4751 memset (global_sym_chain, 0, sizeof (global_sym_chain));
4754 /* Initialize anything that needs initializing at the same time as
4755 start_symtab() is called. */
4760 global_stabs = NULL; /* AIX COFF */
4761 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4762 n_this_object_header_files = 1;
4763 type_vector_length = 0;
4764 type_vector = (struct type **) 0;
4766 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4767 common_block_name = NULL;
4770 /* Call after end_symtab(). */
4777 xfree (type_vector);
4780 type_vector_length = 0;
4781 previous_stab_code = 0;
4785 finish_global_stabs (struct objfile *objfile)
4789 patch_block_stabs (global_symbols, global_stabs, objfile);
4790 xfree (global_stabs);
4791 global_stabs = NULL;
4795 /* Find the end of the name, delimited by a ':', but don't match
4796 ObjC symbols which look like -[Foo bar::]:bla. */
4798 find_name_end (char *name)
4802 if (s[0] == '-' || *s == '+')
4804 /* Must be an ObjC method symbol. */
4807 error (_("invalid symbol name \"%s\""), name);
4809 s = strchr (s, ']');
4812 error (_("invalid symbol name \"%s\""), name);
4814 return strchr (s, ':');
4818 return strchr (s, ':');
4822 /* Initializer for this module. */
4825 _initialize_stabsread (void)
4827 rs6000_builtin_type_data = register_objfile_data ();
4829 undef_types_allocated = 20;
4830 undef_types_length = 0;
4831 undef_types = (struct type **)
4832 xmalloc (undef_types_allocated * sizeof (struct type *));
4834 noname_undefs_allocated = 20;
4835 noname_undefs_length = 0;
4836 noname_undefs = (struct nat *)
4837 xmalloc (noname_undefs_allocated * sizeof (struct nat));
4839 stab_register_index = register_symbol_register_impl (LOC_REGISTER,
4840 &stab_register_funcs);
4841 stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
4842 &stab_register_funcs);