1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2020 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Support routines for reading and decoding debugging information in
21 the "stabs" format. This format is used by some systems that use
22 COFF or ELF where the stabs data is placed in a special section (as
23 well as with many old systems that used the a.out object file
24 format). Avoid placing any object file format specific code in
29 #include "gdb_obstack.h"
32 #include "expression.h"
35 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native. */
37 #include "aout/aout64.h"
38 #include "gdb-stabs.h"
39 #include "buildsym-legacy.h"
40 #include "complaints.h"
42 #include "gdb-demangle.h"
44 #include "target-float.h"
47 #include "cp-support.h"
50 #include "stabsread.h"
52 /* See stabsread.h for these globals. */
54 const char *(*next_symbol_text_func
) (struct objfile
*);
55 unsigned char processing_gcc_compilation
;
57 struct symbol
*global_sym_chain
[HASHSIZE
];
58 struct pending_stabs
*global_stabs
;
59 int previous_stab_code
;
60 int *this_object_header_files
;
61 int n_this_object_header_files
;
62 int n_allocated_this_object_header_files
;
66 struct nextfield
*next
;
68 /* This is the raw visibility from the stab. It is not checked
69 for being one of the visibilities we recognize, so code which
70 examines this field better be able to deal. */
76 struct next_fnfieldlist
78 struct next_fnfieldlist
*next
;
79 struct fn_fieldlist fn_fieldlist
;
82 /* The routines that read and process a complete stabs for a C struct or
83 C++ class pass lists of data member fields and lists of member function
84 fields in an instance of a field_info structure, as defined below.
85 This is part of some reorganization of low level C++ support and is
86 expected to eventually go away... (FIXME) */
88 struct stab_field_info
90 struct nextfield
*list
= nullptr;
91 struct next_fnfieldlist
*fnlist
= nullptr;
97 read_one_struct_field (struct stab_field_info
*, const char **, const char *,
98 struct type
*, struct objfile
*);
100 static struct type
*dbx_alloc_type (int[2], struct objfile
*);
102 static long read_huge_number (const char **, int, int *, int);
104 static struct type
*error_type (const char **, struct objfile
*);
107 patch_block_stabs (struct pending
*, struct pending_stabs
*,
110 static void fix_common_block (struct symbol
*, CORE_ADDR
);
112 static int read_type_number (const char **, int *);
114 static struct type
*read_type (const char **, struct objfile
*);
116 static struct type
*read_range_type (const char **, int[2],
117 int, struct objfile
*);
119 static struct type
*read_sun_builtin_type (const char **,
120 int[2], struct objfile
*);
122 static struct type
*read_sun_floating_type (const char **, int[2],
125 static struct type
*read_enum_type (const char **, struct type
*, struct objfile
*);
127 static struct type
*rs6000_builtin_type (int, struct objfile
*);
130 read_member_functions (struct stab_field_info
*, const char **, struct type
*,
134 read_struct_fields (struct stab_field_info
*, const char **, struct type
*,
138 read_baseclasses (struct stab_field_info
*, const char **, struct type
*,
142 read_tilde_fields (struct stab_field_info
*, const char **, struct type
*,
145 static int attach_fn_fields_to_type (struct stab_field_info
*, struct type
*);
147 static int attach_fields_to_type (struct stab_field_info
*, struct type
*,
150 static struct type
*read_struct_type (const char **, struct type
*,
154 static struct type
*read_array_type (const char **, struct type
*,
157 static struct field
*read_args (const char **, int, struct objfile
*,
160 static void add_undefined_type (struct type
*, int[2]);
163 read_cpp_abbrev (struct stab_field_info
*, const char **, struct type
*,
166 static const char *find_name_end (const char *name
);
168 static int process_reference (const char **string
);
170 void stabsread_clear_cache (void);
172 static const char vptr_name
[] = "_vptr$";
173 static const char vb_name
[] = "_vb$";
176 invalid_cpp_abbrev_complaint (const char *arg1
)
178 complaint (_("invalid C++ abbreviation `%s'"), arg1
);
182 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
184 complaint (_("bad register number %d (max %d) in symbol %s"),
185 regnum
, num_regs
- 1, sym
);
189 stabs_general_complaint (const char *arg1
)
191 complaint ("%s", arg1
);
194 /* Make a list of forward references which haven't been defined. */
196 static struct type
**undef_types
;
197 static int undef_types_allocated
;
198 static int undef_types_length
;
199 static struct symbol
*current_symbol
= NULL
;
201 /* Make a list of nameless types that are undefined.
202 This happens when another type is referenced by its number
203 before this type is actually defined. For instance "t(0,1)=k(0,2)"
204 and type (0,2) is defined only later. */
211 static struct nat
*noname_undefs
;
212 static int noname_undefs_allocated
;
213 static int noname_undefs_length
;
215 /* Check for and handle cretinous stabs symbol name continuation! */
216 #define STABS_CONTINUE(pp,objfile) \
218 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
219 *(pp) = next_symbol_text (objfile); \
222 /* Vector of types defined so far, indexed by their type numbers.
223 (In newer sun systems, dbx uses a pair of numbers in parens,
224 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
225 Then these numbers must be translated through the type_translations
226 hash table to get the index into the type vector.) */
228 static struct type
**type_vector
;
230 /* Number of elements allocated for type_vector currently. */
232 static int type_vector_length
;
234 /* Initial size of type vector. Is realloc'd larger if needed, and
235 realloc'd down to the size actually used, when completed. */
237 #define INITIAL_TYPE_VECTOR_LENGTH 160
240 /* Look up a dbx type-number pair. Return the address of the slot
241 where the type for that number-pair is stored.
242 The number-pair is in TYPENUMS.
244 This can be used for finding the type associated with that pair
245 or for associating a new type with the pair. */
247 static struct type
**
248 dbx_lookup_type (int typenums
[2], struct objfile
*objfile
)
250 int filenum
= typenums
[0];
251 int index
= typenums
[1];
254 struct header_file
*f
;
257 if (filenum
== -1) /* -1,-1 is for temporary types. */
260 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
262 complaint (_("Invalid symbol data: type number "
263 "(%d,%d) out of range at symtab pos %d."),
264 filenum
, index
, symnum
);
272 /* Caller wants address of address of type. We think
273 that negative (rs6k builtin) types will never appear as
274 "lvalues", (nor should they), so we stuff the real type
275 pointer into a temp, and return its address. If referenced,
276 this will do the right thing. */
277 static struct type
*temp_type
;
279 temp_type
= rs6000_builtin_type (index
, objfile
);
283 /* Type is defined outside of header files.
284 Find it in this object file's type vector. */
285 if (index
>= type_vector_length
)
287 old_len
= type_vector_length
;
290 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
291 type_vector
= XNEWVEC (struct type
*, type_vector_length
);
293 while (index
>= type_vector_length
)
295 type_vector_length
*= 2;
297 type_vector
= (struct type
**)
298 xrealloc ((char *) type_vector
,
299 (type_vector_length
* sizeof (struct type
*)));
300 memset (&type_vector
[old_len
], 0,
301 (type_vector_length
- old_len
) * sizeof (struct type
*));
303 return (&type_vector
[index
]);
307 real_filenum
= this_object_header_files
[filenum
];
309 if (real_filenum
>= N_HEADER_FILES (objfile
))
311 static struct type
*temp_type
;
313 warning (_("GDB internal error: bad real_filenum"));
316 temp_type
= objfile_type (objfile
)->builtin_error
;
320 f
= HEADER_FILES (objfile
) + real_filenum
;
322 f_orig_length
= f
->length
;
323 if (index
>= f_orig_length
)
325 while (index
>= f
->length
)
329 f
->vector
= (struct type
**)
330 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
331 memset (&f
->vector
[f_orig_length
], 0,
332 (f
->length
- f_orig_length
) * sizeof (struct type
*));
334 return (&f
->vector
[index
]);
338 /* Make sure there is a type allocated for type numbers TYPENUMS
339 and return the type object.
340 This can create an empty (zeroed) type object.
341 TYPENUMS may be (-1, -1) to return a new type object that is not
342 put into the type vector, and so may not be referred to by number. */
345 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
347 struct type
**type_addr
;
349 if (typenums
[0] == -1)
351 return (alloc_type (objfile
));
354 type_addr
= dbx_lookup_type (typenums
, objfile
);
356 /* If we are referring to a type not known at all yet,
357 allocate an empty type for it.
358 We will fill it in later if we find out how. */
361 *type_addr
= alloc_type (objfile
);
367 /* Allocate a floating-point type of size BITS. */
370 dbx_init_float_type (struct objfile
*objfile
, int bits
)
372 struct gdbarch
*gdbarch
= objfile
->arch ();
373 const struct floatformat
**format
;
376 format
= gdbarch_floatformat_for_type (gdbarch
, NULL
, bits
);
378 type
= init_float_type (objfile
, bits
, NULL
, format
);
380 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, NULL
);
385 /* for all the stabs in a given stab vector, build appropriate types
386 and fix their symbols in given symbol vector. */
389 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
390 struct objfile
*objfile
)
399 /* for all the stab entries, find their corresponding symbols and
400 patch their types! */
402 for (ii
= 0; ii
< stabs
->count
; ++ii
)
404 name
= stabs
->stab
[ii
];
405 pp
= (char *) strchr (name
, ':');
406 gdb_assert (pp
); /* Must find a ':' or game's over. */
410 pp
= (char *) strchr (pp
, ':');
412 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
415 /* FIXME-maybe: it would be nice if we noticed whether
416 the variable was defined *anywhere*, not just whether
417 it is defined in this compilation unit. But neither
418 xlc or GCC seem to need such a definition, and until
419 we do psymtabs (so that the minimal symbols from all
420 compilation units are available now), I'm not sure
421 how to get the information. */
423 /* On xcoff, if a global is defined and never referenced,
424 ld will remove it from the executable. There is then
425 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
426 sym
= new (&objfile
->objfile_obstack
) symbol
;
427 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
428 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
429 sym
->set_linkage_name
430 (obstack_strndup (&objfile
->objfile_obstack
, name
, pp
- name
));
432 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
434 /* I don't think the linker does this with functions,
435 so as far as I know this is never executed.
436 But it doesn't hurt to check. */
438 lookup_function_type (read_type (&pp
, objfile
));
442 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
444 add_symbol_to_list (sym
, get_global_symbols ());
449 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
452 lookup_function_type (read_type (&pp
, objfile
));
456 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
464 /* Read a number by which a type is referred to in dbx data,
465 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
466 Just a single number N is equivalent to (0,N).
467 Return the two numbers by storing them in the vector TYPENUMS.
468 TYPENUMS will then be used as an argument to dbx_lookup_type.
470 Returns 0 for success, -1 for error. */
473 read_type_number (const char **pp
, int *typenums
)
480 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
483 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
490 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
498 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
499 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
500 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
501 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
503 /* Structure for storing pointers to reference definitions for fast lookup
504 during "process_later". */
513 #define MAX_CHUNK_REFS 100
514 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
515 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
517 static struct ref_map
*ref_map
;
519 /* Ptr to free cell in chunk's linked list. */
520 static int ref_count
= 0;
522 /* Number of chunks malloced. */
523 static int ref_chunk
= 0;
525 /* This file maintains a cache of stabs aliases found in the symbol
526 table. If the symbol table changes, this cache must be cleared
527 or we are left holding onto data in invalid obstacks. */
529 stabsread_clear_cache (void)
535 /* Create array of pointers mapping refids to symbols and stab strings.
536 Add pointers to reference definition symbols and/or their values as we
537 find them, using their reference numbers as our index.
538 These will be used later when we resolve references. */
540 ref_add (int refnum
, struct symbol
*sym
, const char *stabs
, CORE_ADDR value
)
544 if (refnum
>= ref_count
)
545 ref_count
= refnum
+ 1;
546 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
548 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
549 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
551 ref_map
= (struct ref_map
*)
552 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
553 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0,
554 new_chunks
* REF_CHUNK_SIZE
);
555 ref_chunk
+= new_chunks
;
557 ref_map
[refnum
].stabs
= stabs
;
558 ref_map
[refnum
].sym
= sym
;
559 ref_map
[refnum
].value
= value
;
562 /* Return defined sym for the reference REFNUM. */
564 ref_search (int refnum
)
566 if (refnum
< 0 || refnum
> ref_count
)
568 return ref_map
[refnum
].sym
;
571 /* Parse a reference id in STRING and return the resulting
572 reference number. Move STRING beyond the reference id. */
575 process_reference (const char **string
)
583 /* Advance beyond the initial '#'. */
586 /* Read number as reference id. */
587 while (*p
&& isdigit (*p
))
589 refnum
= refnum
* 10 + *p
- '0';
596 /* If STRING defines a reference, store away a pointer to the reference
597 definition for later use. Return the reference number. */
600 symbol_reference_defined (const char **string
)
602 const char *p
= *string
;
605 refnum
= process_reference (&p
);
607 /* Defining symbols end in '='. */
610 /* Symbol is being defined here. */
616 /* Must be a reference. Either the symbol has already been defined,
617 or this is a forward reference to it. */
624 stab_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
626 int regno
= gdbarch_stab_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
628 if (regno
< 0 || regno
>= gdbarch_num_cooked_regs (gdbarch
))
630 reg_value_complaint (regno
, gdbarch_num_cooked_regs (gdbarch
),
633 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless. */
639 static const struct symbol_register_ops stab_register_funcs
= {
643 /* The "aclass" indices for computed symbols. */
645 static int stab_register_index
;
646 static int stab_regparm_index
;
649 define_symbol (CORE_ADDR valu
, const char *string
, int desc
, int type
,
650 struct objfile
*objfile
)
652 struct gdbarch
*gdbarch
= objfile
->arch ();
654 const char *p
= find_name_end (string
);
659 /* We would like to eliminate nameless symbols, but keep their types.
660 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
661 to type 2, but, should not create a symbol to address that type. Since
662 the symbol will be nameless, there is no way any user can refer to it. */
666 /* Ignore syms with empty names. */
670 /* Ignore old-style symbols from cc -go. */
681 _("Bad stabs string '%s'"), string
);
686 /* If a nameless stab entry, all we need is the type, not the symbol.
687 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
688 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
690 current_symbol
= sym
= new (&objfile
->objfile_obstack
) symbol
;
692 if (processing_gcc_compilation
)
694 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
695 number of bytes occupied by a type or object, which we ignore. */
696 SYMBOL_LINE (sym
) = desc
;
700 SYMBOL_LINE (sym
) = 0; /* unknown */
703 sym
->set_language (get_current_subfile ()->language
,
704 &objfile
->objfile_obstack
);
706 if (is_cplus_marker (string
[0]))
708 /* Special GNU C++ names. */
712 sym
->set_linkage_name ("this");
715 case 'v': /* $vtbl_ptr_type */
719 sym
->set_linkage_name ("eh_throw");
723 /* This was an anonymous type that was never fixed up. */
727 /* SunPRO (3.0 at least) static variable encoding. */
728 if (gdbarch_static_transform_name_p (gdbarch
))
733 complaint (_("Unknown C++ symbol name `%s'"),
735 goto normal
; /* Do *something* with it. */
741 gdb::unique_xmalloc_ptr
<char> new_name
;
743 if (sym
->language () == language_cplus
)
745 char *name
= (char *) alloca (p
- string
+ 1);
747 memcpy (name
, string
, p
- string
);
748 name
[p
- string
] = '\0';
749 new_name
= cp_canonicalize_string (name
);
751 if (new_name
!= nullptr)
752 sym
->compute_and_set_names (new_name
.get (), true, objfile
->per_bfd
);
754 sym
->compute_and_set_names (gdb::string_view (string
, p
- string
), true,
757 if (sym
->language () == language_cplus
)
758 cp_scan_for_anonymous_namespaces (get_buildsym_compunit (), sym
,
764 /* Determine the type of name being defined. */
766 /* Getting GDB to correctly skip the symbol on an undefined symbol
767 descriptor and not ever dump core is a very dodgy proposition if
768 we do things this way. I say the acorn RISC machine can just
769 fix their compiler. */
770 /* The Acorn RISC machine's compiler can put out locals that don't
771 start with "234=" or "(3,4)=", so assume anything other than the
772 deftypes we know how to handle is a local. */
773 if (!strchr ("cfFGpPrStTvVXCR", *p
))
775 if (isdigit (*p
) || *p
== '(' || *p
== '-')
784 /* c is a special case, not followed by a type-number.
785 SYMBOL:c=iVALUE for an integer constant symbol.
786 SYMBOL:c=rVALUE for a floating constant symbol.
787 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
788 e.g. "b:c=e6,0" for "const b = blob1"
789 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
792 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
793 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
794 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
795 add_symbol_to_list (sym
, get_file_symbols ());
804 struct type
*dbl_type
;
806 dbl_type
= objfile_type (objfile
)->builtin_double
;
808 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
809 TYPE_LENGTH (dbl_type
));
811 target_float_from_string (dbl_valu
, dbl_type
, std::string (p
));
813 SYMBOL_TYPE (sym
) = dbl_type
;
814 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
815 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
820 /* Defining integer constants this way is kind of silly,
821 since 'e' constants allows the compiler to give not
822 only the value, but the type as well. C has at least
823 int, long, unsigned int, and long long as constant
824 types; other languages probably should have at least
825 unsigned as well as signed constants. */
827 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_long
;
828 SYMBOL_VALUE (sym
) = atoi (p
);
829 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
835 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_char
;
836 SYMBOL_VALUE (sym
) = atoi (p
);
837 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
843 struct type
*range_type
;
846 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
847 gdb_byte
*string_value
;
849 if (quote
!= '\'' && quote
!= '"')
851 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
852 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
853 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
854 add_symbol_to_list (sym
, get_file_symbols ());
858 /* Find matching quote, rejecting escaped quotes. */
859 while (*p
&& *p
!= quote
)
861 if (*p
== '\\' && p
[1] == quote
)
863 string_local
[ind
] = (gdb_byte
) quote
;
869 string_local
[ind
] = (gdb_byte
) (*p
);
876 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
877 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
878 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
879 add_symbol_to_list (sym
, get_file_symbols ());
883 /* NULL terminate the string. */
884 string_local
[ind
] = 0;
886 = create_static_range_type (NULL
,
887 objfile_type (objfile
)->builtin_int
,
889 SYMBOL_TYPE (sym
) = create_array_type (NULL
,
890 objfile_type (objfile
)->builtin_char
,
893 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
894 memcpy (string_value
, string_local
, ind
+ 1);
897 SYMBOL_VALUE_BYTES (sym
) = string_value
;
898 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
903 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
904 can be represented as integral.
905 e.g. "b:c=e6,0" for "const b = blob1"
906 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
908 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
909 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
913 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
918 /* If the value is too big to fit in an int (perhaps because
919 it is unsigned), or something like that, we silently get
920 a bogus value. The type and everything else about it is
921 correct. Ideally, we should be using whatever we have
922 available for parsing unsigned and long long values,
924 SYMBOL_VALUE (sym
) = atoi (p
);
929 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
930 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
933 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
934 add_symbol_to_list (sym
, get_file_symbols ());
938 /* The name of a caught exception. */
939 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
940 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
941 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
942 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
943 add_symbol_to_list (sym
, get_local_symbols ());
947 /* A static function definition. */
948 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
949 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
950 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
951 add_symbol_to_list (sym
, get_file_symbols ());
952 /* fall into process_function_types. */
954 process_function_types
:
955 /* Function result types are described as the result type in stabs.
956 We need to convert this to the function-returning-type-X type
957 in GDB. E.g. "int" is converted to "function returning int". */
958 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_FUNC
)
959 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
961 /* All functions in C++ have prototypes. Stabs does not offer an
962 explicit way to identify prototyped or unprototyped functions,
963 but both GCC and Sun CC emit stabs for the "call-as" type rather
964 than the "declared-as" type for unprototyped functions, so
965 we treat all functions as if they were prototyped. This is used
966 primarily for promotion when calling the function from GDB. */
967 TYPE_PROTOTYPED (SYMBOL_TYPE (sym
)) = 1;
969 /* fall into process_prototype_types. */
971 process_prototype_types
:
972 /* Sun acc puts declared types of arguments here. */
975 struct type
*ftype
= SYMBOL_TYPE (sym
);
980 /* Obtain a worst case guess for the number of arguments
981 by counting the semicolons. */
988 /* Allocate parameter information fields and fill them in. */
989 TYPE_FIELDS (ftype
) = (struct field
*)
990 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
995 /* A type number of zero indicates the start of varargs.
996 FIXME: GDB currently ignores vararg functions. */
997 if (p
[0] == '0' && p
[1] == '\0')
999 ptype
= read_type (&p
, objfile
);
1001 /* The Sun compilers mark integer arguments, which should
1002 be promoted to the width of the calling conventions, with
1003 a type which references itself. This type is turned into
1004 a TYPE_CODE_VOID type by read_type, and we have to turn
1005 it back into builtin_int here.
1006 FIXME: Do we need a new builtin_promoted_int_arg ? */
1007 if (ptype
->code () == TYPE_CODE_VOID
)
1008 ptype
= objfile_type (objfile
)->builtin_int
;
1009 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
1010 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1012 ftype
->set_num_fields (nparams
);
1013 TYPE_PROTOTYPED (ftype
) = 1;
1018 /* A global function definition. */
1019 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1020 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1021 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1022 add_symbol_to_list (sym
, get_global_symbols ());
1023 goto process_function_types
;
1026 /* For a class G (global) symbol, it appears that the
1027 value is not correct. It is necessary to search for the
1028 corresponding linker definition to find the value.
1029 These definitions appear at the end of the namelist. */
1030 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1031 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1032 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1033 /* Don't add symbol references to global_sym_chain.
1034 Symbol references don't have valid names and wont't match up with
1035 minimal symbols when the global_sym_chain is relocated.
1036 We'll fixup symbol references when we fixup the defining symbol. */
1037 if (sym
->linkage_name () && sym
->linkage_name ()[0] != '#')
1039 i
= hashname (sym
->linkage_name ());
1040 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
1041 global_sym_chain
[i
] = sym
;
1043 add_symbol_to_list (sym
, get_global_symbols ());
1046 /* This case is faked by a conditional above,
1047 when there is no code letter in the dbx data.
1048 Dbx data never actually contains 'l'. */
1051 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1052 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1053 SYMBOL_VALUE (sym
) = valu
;
1054 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1055 add_symbol_to_list (sym
, get_local_symbols ());
1060 /* pF is a two-letter code that means a function parameter in Fortran.
1061 The type-number specifies the type of the return value.
1062 Translate it into a pointer-to-function type. */
1066 = lookup_pointer_type
1067 (lookup_function_type (read_type (&p
, objfile
)));
1070 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1072 SYMBOL_ACLASS_INDEX (sym
) = LOC_ARG
;
1073 SYMBOL_VALUE (sym
) = valu
;
1074 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1075 SYMBOL_IS_ARGUMENT (sym
) = 1;
1076 add_symbol_to_list (sym
, get_local_symbols ());
1078 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1080 /* On little-endian machines, this crud is never necessary,
1081 and, if the extra bytes contain garbage, is harmful. */
1085 /* If it's gcc-compiled, if it says `short', believe it. */
1086 if (processing_gcc_compilation
1087 || gdbarch_believe_pcc_promotion (gdbarch
))
1090 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1092 /* If PCC says a parameter is a short or a char, it is
1094 if (TYPE_LENGTH (SYMBOL_TYPE (sym
))
1095 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1096 && SYMBOL_TYPE (sym
)->code () == TYPE_CODE_INT
)
1099 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1100 ? objfile_type (objfile
)->builtin_unsigned_int
1101 : objfile_type (objfile
)->builtin_int
;
1108 /* acc seems to use P to declare the prototypes of functions that
1109 are referenced by this file. gdb is not prepared to deal
1110 with this extra information. FIXME, it ought to. */
1113 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1114 goto process_prototype_types
;
1119 /* Parameter which is in a register. */
1120 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1121 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1122 SYMBOL_IS_ARGUMENT (sym
) = 1;
1123 SYMBOL_VALUE (sym
) = valu
;
1124 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1125 add_symbol_to_list (sym
, get_local_symbols ());
1129 /* Register variable (either global or local). */
1130 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1131 SYMBOL_ACLASS_INDEX (sym
) = stab_register_index
;
1132 SYMBOL_VALUE (sym
) = valu
;
1133 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1134 if (within_function
)
1136 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1137 the same name to represent an argument passed in a
1138 register. GCC uses 'P' for the same case. So if we find
1139 such a symbol pair we combine it into one 'P' symbol.
1140 For Sun cc we need to do this regardless of stabs_argument_has_addr, because the compiler puts out
1141 the 'p' symbol even if it never saves the argument onto
1144 On most machines, we want to preserve both symbols, so
1145 that we can still get information about what is going on
1146 with the stack (VAX for computing args_printed, using
1147 stack slots instead of saved registers in backtraces,
1150 Note that this code illegally combines
1151 main(argc) struct foo argc; { register struct foo argc; }
1152 but this case is considered pathological and causes a warning
1153 from a decent compiler. */
1155 struct pending
*local_symbols
= *get_local_symbols ();
1157 && local_symbols
->nsyms
> 0
1158 && gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
)))
1160 struct symbol
*prev_sym
;
1162 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1163 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1164 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1165 && strcmp (prev_sym
->linkage_name (),
1166 sym
->linkage_name ()) == 0)
1168 SYMBOL_ACLASS_INDEX (prev_sym
) = stab_register_index
;
1169 /* Use the type from the LOC_REGISTER; that is the type
1170 that is actually in that register. */
1171 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1172 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1177 add_symbol_to_list (sym
, get_local_symbols ());
1180 add_symbol_to_list (sym
, get_file_symbols ());
1184 /* Static symbol at top level of file. */
1185 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1186 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1187 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1188 if (gdbarch_static_transform_name_p (gdbarch
)
1189 && gdbarch_static_transform_name (gdbarch
, sym
->linkage_name ())
1190 != sym
->linkage_name ())
1192 struct bound_minimal_symbol msym
;
1194 msym
= lookup_minimal_symbol (sym
->linkage_name (), NULL
, objfile
);
1195 if (msym
.minsym
!= NULL
)
1197 const char *new_name
= gdbarch_static_transform_name
1198 (gdbarch
, sym
->linkage_name ());
1200 sym
->set_linkage_name (new_name
);
1201 SET_SYMBOL_VALUE_ADDRESS (sym
,
1202 BMSYMBOL_VALUE_ADDRESS (msym
));
1205 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1206 add_symbol_to_list (sym
, get_file_symbols ());
1210 /* In Ada, there is no distinction between typedef and non-typedef;
1211 any type declaration implicitly has the equivalent of a typedef,
1212 and thus 't' is in fact equivalent to 'Tt'.
1214 Therefore, for Ada units, we check the character immediately
1215 before the 't', and if we do not find a 'T', then make sure to
1216 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1217 will be stored in the VAR_DOMAIN). If the symbol was indeed
1218 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1219 elsewhere, so we don't need to take care of that.
1221 This is important to do, because of forward references:
1222 The cleanup of undefined types stored in undef_types only uses
1223 STRUCT_DOMAIN symbols to perform the replacement. */
1224 synonym
= (sym
->language () == language_ada
&& p
[-2] != 'T');
1227 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1229 /* For a nameless type, we don't want a create a symbol, thus we
1230 did not use `sym'. Return without further processing. */
1234 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1235 SYMBOL_VALUE (sym
) = valu
;
1236 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1237 /* C++ vagaries: we may have a type which is derived from
1238 a base type which did not have its name defined when the
1239 derived class was output. We fill in the derived class's
1240 base part member's name here in that case. */
1241 if (SYMBOL_TYPE (sym
)->name () != NULL
)
1242 if ((SYMBOL_TYPE (sym
)->code () == TYPE_CODE_STRUCT
1243 || SYMBOL_TYPE (sym
)->code () == TYPE_CODE_UNION
)
1244 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1248 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1249 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1250 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1251 TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
)->name ();
1254 if (SYMBOL_TYPE (sym
)->name () == NULL
)
1256 if ((SYMBOL_TYPE (sym
)->code () == TYPE_CODE_PTR
1257 && strcmp (sym
->linkage_name (), vtbl_ptr_name
))
1258 || SYMBOL_TYPE (sym
)->code () == TYPE_CODE_FUNC
)
1260 /* If we are giving a name to a type such as "pointer to
1261 foo" or "function returning foo", we better not set
1262 the TYPE_NAME. If the program contains "typedef char
1263 *caddr_t;", we don't want all variables of type char
1264 * to print as caddr_t. This is not just a
1265 consequence of GDB's type management; PCC and GCC (at
1266 least through version 2.4) both output variables of
1267 either type char * or caddr_t with the type number
1268 defined in the 't' symbol for caddr_t. If a future
1269 compiler cleans this up it GDB is not ready for it
1270 yet, but if it becomes ready we somehow need to
1271 disable this check (without breaking the PCC/GCC2.4
1276 Fortunately, this check seems not to be necessary
1277 for anything except pointers or functions. */
1278 /* ezannoni: 2000-10-26. This seems to apply for
1279 versions of gcc older than 2.8. This was the original
1280 problem: with the following code gdb would tell that
1281 the type for name1 is caddr_t, and func is char().
1283 typedef char *caddr_t;
1295 /* Pascal accepts names for pointer types. */
1296 if (get_current_subfile ()->language
== language_pascal
)
1297 SYMBOL_TYPE (sym
)->set_name (sym
->linkage_name ());
1300 SYMBOL_TYPE (sym
)->set_name (sym
->linkage_name ());
1303 add_symbol_to_list (sym
, get_file_symbols ());
1307 /* Create the STRUCT_DOMAIN clone. */
1308 struct symbol
*struct_sym
= new (&objfile
->objfile_obstack
) symbol
;
1311 SYMBOL_ACLASS_INDEX (struct_sym
) = LOC_TYPEDEF
;
1312 SYMBOL_VALUE (struct_sym
) = valu
;
1313 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1314 if (SYMBOL_TYPE (sym
)->name () == 0)
1315 SYMBOL_TYPE (sym
)->set_name
1316 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1318 add_symbol_to_list (struct_sym
, get_file_symbols ());
1324 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1325 by 't' which means we are typedef'ing it as well. */
1326 synonym
= *p
== 't';
1331 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1333 /* For a nameless type, we don't want a create a symbol, thus we
1334 did not use `sym'. Return without further processing. */
1338 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
1339 SYMBOL_VALUE (sym
) = valu
;
1340 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1341 if (SYMBOL_TYPE (sym
)->name () == 0)
1342 SYMBOL_TYPE (sym
)->set_name
1343 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1345 add_symbol_to_list (sym
, get_file_symbols ());
1349 /* Clone the sym and then modify it. */
1350 struct symbol
*typedef_sym
= new (&objfile
->objfile_obstack
) symbol
;
1352 *typedef_sym
= *sym
;
1353 SYMBOL_ACLASS_INDEX (typedef_sym
) = LOC_TYPEDEF
;
1354 SYMBOL_VALUE (typedef_sym
) = valu
;
1355 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1356 if (SYMBOL_TYPE (sym
)->name () == 0)
1357 SYMBOL_TYPE (sym
)->set_name
1358 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1360 add_symbol_to_list (typedef_sym
, get_file_symbols ());
1365 /* Static symbol of local scope. */
1366 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1367 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
1368 SET_SYMBOL_VALUE_ADDRESS (sym
, valu
);
1369 if (gdbarch_static_transform_name_p (gdbarch
)
1370 && gdbarch_static_transform_name (gdbarch
, sym
->linkage_name ())
1371 != sym
->linkage_name ())
1373 struct bound_minimal_symbol msym
;
1375 msym
= lookup_minimal_symbol (sym
->linkage_name (), NULL
, objfile
);
1376 if (msym
.minsym
!= NULL
)
1378 const char *new_name
= gdbarch_static_transform_name
1379 (gdbarch
, sym
->linkage_name ());
1381 sym
->set_linkage_name (new_name
);
1382 SET_SYMBOL_VALUE_ADDRESS (sym
, BMSYMBOL_VALUE_ADDRESS (msym
));
1385 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1386 add_symbol_to_list (sym
, get_local_symbols ());
1390 /* Reference parameter */
1391 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1392 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1393 SYMBOL_IS_ARGUMENT (sym
) = 1;
1394 SYMBOL_VALUE (sym
) = valu
;
1395 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1396 add_symbol_to_list (sym
, get_local_symbols ());
1400 /* Reference parameter which is in a register. */
1401 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1402 SYMBOL_ACLASS_INDEX (sym
) = stab_regparm_index
;
1403 SYMBOL_IS_ARGUMENT (sym
) = 1;
1404 SYMBOL_VALUE (sym
) = valu
;
1405 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1406 add_symbol_to_list (sym
, get_local_symbols ());
1410 /* This is used by Sun FORTRAN for "function result value".
1411 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1412 that Pascal uses it too, but when I tried it Pascal used
1413 "x:3" (local symbol) instead. */
1414 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1415 SYMBOL_ACLASS_INDEX (sym
) = LOC_LOCAL
;
1416 SYMBOL_VALUE (sym
) = valu
;
1417 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1418 add_symbol_to_list (sym
, get_local_symbols ());
1422 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1423 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
1424 SYMBOL_VALUE (sym
) = 0;
1425 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1426 add_symbol_to_list (sym
, get_file_symbols ());
1430 /* Some systems pass variables of certain types by reference instead
1431 of by value, i.e. they will pass the address of a structure (in a
1432 register or on the stack) instead of the structure itself. */
1434 if (gdbarch_stabs_argument_has_addr (gdbarch
, SYMBOL_TYPE (sym
))
1435 && SYMBOL_IS_ARGUMENT (sym
))
1437 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1438 variables passed in a register). */
1439 if (SYMBOL_CLASS (sym
) == LOC_REGISTER
)
1440 SYMBOL_ACLASS_INDEX (sym
) = LOC_REGPARM_ADDR
;
1441 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1442 and subsequent arguments on SPARC, for example). */
1443 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1444 SYMBOL_ACLASS_INDEX (sym
) = LOC_REF_ARG
;
1450 /* Skip rest of this symbol and return an error type.
1452 General notes on error recovery: error_type always skips to the
1453 end of the symbol (modulo cretinous dbx symbol name continuation).
1454 Thus code like this:
1456 if (*(*pp)++ != ';')
1457 return error_type (pp, objfile);
1459 is wrong because if *pp starts out pointing at '\0' (typically as the
1460 result of an earlier error), it will be incremented to point to the
1461 start of the next symbol, which might produce strange results, at least
1462 if you run off the end of the string table. Instead use
1465 return error_type (pp, objfile);
1471 foo = error_type (pp, objfile);
1475 And in case it isn't obvious, the point of all this hair is so the compiler
1476 can define new types and new syntaxes, and old versions of the
1477 debugger will be able to read the new symbol tables. */
1479 static struct type
*
1480 error_type (const char **pp
, struct objfile
*objfile
)
1482 complaint (_("couldn't parse type; debugger out of date?"));
1485 /* Skip to end of symbol. */
1486 while (**pp
!= '\0')
1491 /* Check for and handle cretinous dbx symbol name continuation! */
1492 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1494 *pp
= next_symbol_text (objfile
);
1501 return objfile_type (objfile
)->builtin_error
;
1505 /* Read type information or a type definition; return the type. Even
1506 though this routine accepts either type information or a type
1507 definition, the distinction is relevant--some parts of stabsread.c
1508 assume that type information starts with a digit, '-', or '(' in
1509 deciding whether to call read_type. */
1511 static struct type
*
1512 read_type (const char **pp
, struct objfile
*objfile
)
1514 struct type
*type
= 0;
1517 char type_descriptor
;
1519 /* Size in bits of type if specified by a type attribute, or -1 if
1520 there is no size attribute. */
1523 /* Used to distinguish string and bitstring from char-array and set. */
1526 /* Used to distinguish vector from array. */
1529 /* Read type number if present. The type number may be omitted.
1530 for instance in a two-dimensional array declared with type
1531 "ar1;1;10;ar1;1;10;4". */
1532 if ((**pp
>= '0' && **pp
<= '9')
1536 if (read_type_number (pp
, typenums
) != 0)
1537 return error_type (pp
, objfile
);
1541 /* Type is not being defined here. Either it already
1542 exists, or this is a forward reference to it.
1543 dbx_alloc_type handles both cases. */
1544 type
= dbx_alloc_type (typenums
, objfile
);
1546 /* If this is a forward reference, arrange to complain if it
1547 doesn't get patched up by the time we're done
1549 if (type
->code () == TYPE_CODE_UNDEF
)
1550 add_undefined_type (type
, typenums
);
1555 /* Type is being defined here. */
1557 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1562 /* 'typenums=' not present, type is anonymous. Read and return
1563 the definition, but don't put it in the type vector. */
1564 typenums
[0] = typenums
[1] = -1;
1569 type_descriptor
= (*pp
)[-1];
1570 switch (type_descriptor
)
1574 enum type_code code
;
1576 /* Used to index through file_symbols. */
1577 struct pending
*ppt
;
1580 /* Name including "struct", etc. */
1584 const char *from
, *p
, *q1
, *q2
;
1586 /* Set the type code according to the following letter. */
1590 code
= TYPE_CODE_STRUCT
;
1593 code
= TYPE_CODE_UNION
;
1596 code
= TYPE_CODE_ENUM
;
1600 /* Complain and keep going, so compilers can invent new
1601 cross-reference types. */
1602 complaint (_("Unrecognized cross-reference type `%c'"),
1604 code
= TYPE_CODE_STRUCT
;
1609 q1
= strchr (*pp
, '<');
1610 p
= strchr (*pp
, ':');
1612 return error_type (pp
, objfile
);
1613 if (q1
&& p
> q1
&& p
[1] == ':')
1615 int nesting_level
= 0;
1617 for (q2
= q1
; *q2
; q2
++)
1621 else if (*q2
== '>')
1623 else if (*q2
== ':' && nesting_level
== 0)
1628 return error_type (pp
, objfile
);
1631 if (get_current_subfile ()->language
== language_cplus
)
1633 char *name
= (char *) alloca (p
- *pp
+ 1);
1635 memcpy (name
, *pp
, p
- *pp
);
1636 name
[p
- *pp
] = '\0';
1638 gdb::unique_xmalloc_ptr
<char> new_name
= cp_canonicalize_string (name
);
1639 if (new_name
!= nullptr)
1640 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1643 if (type_name
== NULL
)
1645 char *to
= type_name
= (char *)
1646 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1648 /* Copy the name. */
1655 /* Set the pointer ahead of the name which we just read, and
1660 /* If this type has already been declared, then reuse the same
1661 type, rather than allocating a new one. This saves some
1664 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1665 for (i
= 0; i
< ppt
->nsyms
; i
++)
1667 struct symbol
*sym
= ppt
->symbol
[i
];
1669 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1670 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1671 && (SYMBOL_TYPE (sym
)->code () == code
)
1672 && strcmp (sym
->linkage_name (), type_name
) == 0)
1674 obstack_free (&objfile
->objfile_obstack
, type_name
);
1675 type
= SYMBOL_TYPE (sym
);
1676 if (typenums
[0] != -1)
1677 *dbx_lookup_type (typenums
, objfile
) = type
;
1682 /* Didn't find the type to which this refers, so we must
1683 be dealing with a forward reference. Allocate a type
1684 structure for it, and keep track of it so we can
1685 fill in the rest of the fields when we get the full
1687 type
= dbx_alloc_type (typenums
, objfile
);
1688 type
->set_code (code
);
1689 type
->set_name (type_name
);
1690 INIT_CPLUS_SPECIFIC (type
);
1691 TYPE_STUB (type
) = 1;
1693 add_undefined_type (type
, typenums
);
1697 case '-': /* RS/6000 built-in type */
1711 /* We deal with something like t(1,2)=(3,4)=... which
1712 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1714 /* Allocate and enter the typedef type first.
1715 This handles recursive types. */
1716 type
= dbx_alloc_type (typenums
, objfile
);
1717 type
->set_code (TYPE_CODE_TYPEDEF
);
1719 struct type
*xtype
= read_type (pp
, objfile
);
1723 /* It's being defined as itself. That means it is "void". */
1724 type
->set_code (TYPE_CODE_VOID
);
1725 TYPE_LENGTH (type
) = 1;
1727 else if (type_size
>= 0 || is_string
)
1729 /* This is the absolute wrong way to construct types. Every
1730 other debug format has found a way around this problem and
1731 the related problems with unnecessarily stubbed types;
1732 someone motivated should attempt to clean up the issue
1733 here as well. Once a type pointed to has been created it
1734 should not be modified.
1736 Well, it's not *absolutely* wrong. Constructing recursive
1737 types (trees, linked lists) necessarily entails modifying
1738 types after creating them. Constructing any loop structure
1739 entails side effects. The Dwarf 2 reader does handle this
1740 more gracefully (it never constructs more than once
1741 instance of a type object, so it doesn't have to copy type
1742 objects wholesale), but it still mutates type objects after
1743 other folks have references to them.
1745 Keep in mind that this circularity/mutation issue shows up
1746 at the source language level, too: C's "incomplete types",
1747 for example. So the proper cleanup, I think, would be to
1748 limit GDB's type smashing to match exactly those required
1749 by the source language. So GDB could have a
1750 "complete_this_type" function, but never create unnecessary
1751 copies of a type otherwise. */
1752 replace_type (type
, xtype
);
1753 type
->set_name (NULL
);
1757 TYPE_TARGET_STUB (type
) = 1;
1758 TYPE_TARGET_TYPE (type
) = xtype
;
1763 /* In the following types, we must be sure to overwrite any existing
1764 type that the typenums refer to, rather than allocating a new one
1765 and making the typenums point to the new one. This is because there
1766 may already be pointers to the existing type (if it had been
1767 forward-referenced), and we must change it to a pointer, function,
1768 reference, or whatever, *in-place*. */
1770 case '*': /* Pointer to another type */
1771 type1
= read_type (pp
, objfile
);
1772 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1775 case '&': /* Reference to another type */
1776 type1
= read_type (pp
, objfile
);
1777 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1781 case 'f': /* Function returning another type */
1782 type1
= read_type (pp
, objfile
);
1783 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1786 case 'g': /* Prototyped function. (Sun) */
1788 /* Unresolved questions:
1790 - According to Sun's ``STABS Interface Manual'', for 'f'
1791 and 'F' symbol descriptors, a `0' in the argument type list
1792 indicates a varargs function. But it doesn't say how 'g'
1793 type descriptors represent that info. Someone with access
1794 to Sun's toolchain should try it out.
1796 - According to the comment in define_symbol (search for
1797 `process_prototype_types:'), Sun emits integer arguments as
1798 types which ref themselves --- like `void' types. Do we
1799 have to deal with that here, too? Again, someone with
1800 access to Sun's toolchain should try it out and let us
1803 const char *type_start
= (*pp
) - 1;
1804 struct type
*return_type
= read_type (pp
, objfile
);
1805 struct type
*func_type
1806 = make_function_type (return_type
,
1807 dbx_lookup_type (typenums
, objfile
));
1810 struct type_list
*next
;
1814 while (**pp
&& **pp
!= '#')
1816 struct type
*arg_type
= read_type (pp
, objfile
);
1817 struct type_list
*newobj
= XALLOCA (struct type_list
);
1818 newobj
->type
= arg_type
;
1819 newobj
->next
= arg_types
;
1827 complaint (_("Prototyped function type didn't "
1828 "end arguments with `#':\n%s"),
1832 /* If there is just one argument whose type is `void', then
1833 that's just an empty argument list. */
1835 && ! arg_types
->next
1836 && arg_types
->type
->code () == TYPE_CODE_VOID
)
1839 TYPE_FIELDS (func_type
)
1840 = (struct field
*) TYPE_ALLOC (func_type
,
1841 num_args
* sizeof (struct field
));
1842 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1845 struct type_list
*t
;
1847 /* We stuck each argument type onto the front of the list
1848 when we read it, so the list is reversed. Build the
1849 fields array right-to-left. */
1850 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1851 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1853 func_type
->set_num_fields (num_args
);
1854 TYPE_PROTOTYPED (func_type
) = 1;
1860 case 'k': /* Const qualifier on some type (Sun) */
1861 type
= read_type (pp
, objfile
);
1862 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1863 dbx_lookup_type (typenums
, objfile
));
1866 case 'B': /* Volatile qual on some type (Sun) */
1867 type
= read_type (pp
, objfile
);
1868 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1869 dbx_lookup_type (typenums
, objfile
));
1873 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1874 { /* Member (class & variable) type */
1875 /* FIXME -- we should be doing smash_to_XXX types here. */
1877 struct type
*domain
= read_type (pp
, objfile
);
1878 struct type
*memtype
;
1881 /* Invalid member type data format. */
1882 return error_type (pp
, objfile
);
1885 memtype
= read_type (pp
, objfile
);
1886 type
= dbx_alloc_type (typenums
, objfile
);
1887 smash_to_memberptr_type (type
, domain
, memtype
);
1890 /* type attribute */
1892 const char *attr
= *pp
;
1894 /* Skip to the semicolon. */
1895 while (**pp
!= ';' && **pp
!= '\0')
1898 return error_type (pp
, objfile
);
1900 ++ * pp
; /* Skip the semicolon. */
1904 case 's': /* Size attribute */
1905 type_size
= atoi (attr
+ 1);
1910 case 'S': /* String attribute */
1911 /* FIXME: check to see if following type is array? */
1915 case 'V': /* Vector attribute */
1916 /* FIXME: check to see if following type is array? */
1921 /* Ignore unrecognized type attributes, so future compilers
1922 can invent new ones. */
1930 case '#': /* Method (class & fn) type */
1931 if ((*pp
)[0] == '#')
1933 /* We'll get the parameter types from the name. */
1934 struct type
*return_type
;
1937 return_type
= read_type (pp
, objfile
);
1938 if (*(*pp
)++ != ';')
1939 complaint (_("invalid (minimal) member type "
1940 "data format at symtab pos %d."),
1942 type
= allocate_stub_method (return_type
);
1943 if (typenums
[0] != -1)
1944 *dbx_lookup_type (typenums
, objfile
) = type
;
1948 struct type
*domain
= read_type (pp
, objfile
);
1949 struct type
*return_type
;
1954 /* Invalid member type data format. */
1955 return error_type (pp
, objfile
);
1959 return_type
= read_type (pp
, objfile
);
1960 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1962 return error_type (pp
, objfile
);
1963 type
= dbx_alloc_type (typenums
, objfile
);
1964 smash_to_method_type (type
, domain
, return_type
, args
,
1969 case 'r': /* Range type */
1970 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1971 if (typenums
[0] != -1)
1972 *dbx_lookup_type (typenums
, objfile
) = type
;
1977 /* Sun ACC builtin int type */
1978 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1979 if (typenums
[0] != -1)
1980 *dbx_lookup_type (typenums
, objfile
) = type
;
1984 case 'R': /* Sun ACC builtin float type */
1985 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1986 if (typenums
[0] != -1)
1987 *dbx_lookup_type (typenums
, objfile
) = type
;
1990 case 'e': /* Enumeration type */
1991 type
= dbx_alloc_type (typenums
, objfile
);
1992 type
= read_enum_type (pp
, type
, objfile
);
1993 if (typenums
[0] != -1)
1994 *dbx_lookup_type (typenums
, objfile
) = type
;
1997 case 's': /* Struct type */
1998 case 'u': /* Union type */
2000 enum type_code type_code
= TYPE_CODE_UNDEF
;
2001 type
= dbx_alloc_type (typenums
, objfile
);
2002 switch (type_descriptor
)
2005 type_code
= TYPE_CODE_STRUCT
;
2008 type_code
= TYPE_CODE_UNION
;
2011 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2015 case 'a': /* Array type */
2017 return error_type (pp
, objfile
);
2020 type
= dbx_alloc_type (typenums
, objfile
);
2021 type
= read_array_type (pp
, type
, objfile
);
2023 type
->set_code (TYPE_CODE_STRING
);
2025 make_vector_type (type
);
2028 case 'S': /* Set type */
2029 type1
= read_type (pp
, objfile
);
2030 type
= create_set_type (NULL
, type1
);
2031 if (typenums
[0] != -1)
2032 *dbx_lookup_type (typenums
, objfile
) = type
;
2036 --*pp
; /* Go back to the symbol in error. */
2037 /* Particularly important if it was \0! */
2038 return error_type (pp
, objfile
);
2043 warning (_("GDB internal error, type is NULL in stabsread.c."));
2044 return error_type (pp
, objfile
);
2047 /* Size specified in a type attribute overrides any other size. */
2048 if (type_size
!= -1)
2049 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2054 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2055 Return the proper type node for a given builtin type number. */
2057 static const struct objfile_key
<struct type
*,
2058 gdb::noop_deleter
<struct type
*>>
2059 rs6000_builtin_type_data
;
2061 static struct type
*
2062 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2064 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2066 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2067 #define NUMBER_RECOGNIZED 34
2068 struct type
*rettype
= NULL
;
2070 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2072 complaint (_("Unknown builtin type %d"), typenum
);
2073 return objfile_type (objfile
)->builtin_error
;
2076 if (!negative_types
)
2078 /* This includes an empty slot for type number -0. */
2079 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2080 NUMBER_RECOGNIZED
+ 1, struct type
*);
2081 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2084 if (negative_types
[-typenum
] != NULL
)
2085 return negative_types
[-typenum
];
2087 #if TARGET_CHAR_BIT != 8
2088 #error This code wrong for TARGET_CHAR_BIT not 8
2089 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2090 that if that ever becomes not true, the correct fix will be to
2091 make the size in the struct type to be in bits, not in units of
2098 /* The size of this and all the other types are fixed, defined
2099 by the debugging format. If there is a type called "int" which
2100 is other than 32 bits, then it should use a new negative type
2101 number (or avoid negative type numbers for that case).
2102 See stabs.texinfo. */
2103 rettype
= init_integer_type (objfile
, 32, 0, "int");
2106 rettype
= init_integer_type (objfile
, 8, 0, "char");
2107 TYPE_NOSIGN (rettype
) = 1;
2110 rettype
= init_integer_type (objfile
, 16, 0, "short");
2113 rettype
= init_integer_type (objfile
, 32, 0, "long");
2116 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2119 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2122 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2125 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2128 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2131 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2134 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2137 /* IEEE single precision (32 bit). */
2138 rettype
= init_float_type (objfile
, 32, "float",
2139 floatformats_ieee_single
);
2142 /* IEEE double precision (64 bit). */
2143 rettype
= init_float_type (objfile
, 64, "double",
2144 floatformats_ieee_double
);
2147 /* This is an IEEE double on the RS/6000, and different machines with
2148 different sizes for "long double" should use different negative
2149 type numbers. See stabs.texinfo. */
2150 rettype
= init_float_type (objfile
, 64, "long double",
2151 floatformats_ieee_double
);
2154 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2157 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2160 rettype
= init_float_type (objfile
, 32, "short real",
2161 floatformats_ieee_single
);
2164 rettype
= init_float_type (objfile
, 64, "real",
2165 floatformats_ieee_double
);
2168 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2171 rettype
= init_character_type (objfile
, 8, 1, "character");
2174 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2177 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2180 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2183 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2186 /* Complex type consisting of two IEEE single precision values. */
2187 rettype
= init_complex_type ("complex",
2188 rs6000_builtin_type (12, objfile
));
2191 /* Complex type consisting of two IEEE double precision values. */
2192 rettype
= init_complex_type ("double complex",
2193 rs6000_builtin_type (13, objfile
));
2196 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2199 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2202 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2205 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2208 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2211 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2214 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2217 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2220 negative_types
[-typenum
] = rettype
;
2224 /* This page contains subroutines of read_type. */
2226 /* Wrapper around method_name_from_physname to flag a complaint
2227 if there is an error. */
2230 stabs_method_name_from_physname (const char *physname
)
2234 method_name
= method_name_from_physname (physname
);
2236 if (method_name
== NULL
)
2238 complaint (_("Method has bad physname %s\n"), physname
);
2245 /* Read member function stabs info for C++ classes. The form of each member
2248 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2250 An example with two member functions is:
2252 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2254 For the case of overloaded operators, the format is op$::*.funcs, where
2255 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2256 name (such as `+=') and `.' marks the end of the operator name.
2258 Returns 1 for success, 0 for failure. */
2261 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2262 struct type
*type
, struct objfile
*objfile
)
2269 struct next_fnfield
*next
;
2270 struct fn_field fn_field
;
2273 struct type
*look_ahead_type
;
2274 struct next_fnfieldlist
*new_fnlist
;
2275 struct next_fnfield
*new_sublist
;
2279 /* Process each list until we find something that is not a member function
2280 or find the end of the functions. */
2284 /* We should be positioned at the start of the function name.
2285 Scan forward to find the first ':' and if it is not the
2286 first of a "::" delimiter, then this is not a member function. */
2298 look_ahead_type
= NULL
;
2301 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2303 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2305 /* This is a completely wierd case. In order to stuff in the
2306 names that might contain colons (the usual name delimiter),
2307 Mike Tiemann defined a different name format which is
2308 signalled if the identifier is "op$". In that case, the
2309 format is "op$::XXXX." where XXXX is the name. This is
2310 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2311 /* This lets the user type "break operator+".
2312 We could just put in "+" as the name, but that wouldn't
2314 static char opname
[32] = "op$";
2315 char *o
= opname
+ 3;
2317 /* Skip past '::'. */
2320 STABS_CONTINUE (pp
, objfile
);
2326 main_fn_name
= savestring (opname
, o
- opname
);
2332 main_fn_name
= savestring (*pp
, p
- *pp
);
2333 /* Skip past '::'. */
2336 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2340 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2342 /* Check for and handle cretinous dbx symbol name continuation! */
2343 if (look_ahead_type
== NULL
)
2346 STABS_CONTINUE (pp
, objfile
);
2348 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2351 /* Invalid symtab info for member function. */
2357 /* g++ version 1 kludge */
2358 new_sublist
->fn_field
.type
= look_ahead_type
;
2359 look_ahead_type
= NULL
;
2369 /* These are methods, not functions. */
2370 if (new_sublist
->fn_field
.type
->code () == TYPE_CODE_FUNC
)
2371 new_sublist
->fn_field
.type
->set_code (TYPE_CODE_METHOD
);
2373 gdb_assert (new_sublist
->fn_field
.type
->code ()
2374 == TYPE_CODE_METHOD
);
2376 /* If this is just a stub, then we don't have the real name here. */
2377 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2379 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2380 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2381 new_sublist
->fn_field
.is_stub
= 1;
2384 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2387 /* Set this member function's visibility fields. */
2390 case VISIBILITY_PRIVATE
:
2391 new_sublist
->fn_field
.is_private
= 1;
2393 case VISIBILITY_PROTECTED
:
2394 new_sublist
->fn_field
.is_protected
= 1;
2398 STABS_CONTINUE (pp
, objfile
);
2401 case 'A': /* Normal functions. */
2402 new_sublist
->fn_field
.is_const
= 0;
2403 new_sublist
->fn_field
.is_volatile
= 0;
2406 case 'B': /* `const' member functions. */
2407 new_sublist
->fn_field
.is_const
= 1;
2408 new_sublist
->fn_field
.is_volatile
= 0;
2411 case 'C': /* `volatile' member function. */
2412 new_sublist
->fn_field
.is_const
= 0;
2413 new_sublist
->fn_field
.is_volatile
= 1;
2416 case 'D': /* `const volatile' member function. */
2417 new_sublist
->fn_field
.is_const
= 1;
2418 new_sublist
->fn_field
.is_volatile
= 1;
2421 case '*': /* File compiled with g++ version 1 --
2427 complaint (_("const/volatile indicator missing, got '%c'"),
2437 /* virtual member function, followed by index.
2438 The sign bit is set to distinguish pointers-to-methods
2439 from virtual function indicies. Since the array is
2440 in words, the quantity must be shifted left by 1
2441 on 16 bit machine, and by 2 on 32 bit machine, forcing
2442 the sign bit out, and usable as a valid index into
2443 the array. Remove the sign bit here. */
2444 new_sublist
->fn_field
.voffset
=
2445 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2449 STABS_CONTINUE (pp
, objfile
);
2450 if (**pp
== ';' || **pp
== '\0')
2452 /* Must be g++ version 1. */
2453 new_sublist
->fn_field
.fcontext
= 0;
2457 /* Figure out from whence this virtual function came.
2458 It may belong to virtual function table of
2459 one of its baseclasses. */
2460 look_ahead_type
= read_type (pp
, objfile
);
2463 /* g++ version 1 overloaded methods. */
2467 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2476 look_ahead_type
= NULL
;
2482 /* static member function. */
2484 int slen
= strlen (main_fn_name
);
2486 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2488 /* For static member functions, we can't tell if they
2489 are stubbed, as they are put out as functions, and not as
2491 GCC v2 emits the fully mangled name if
2492 dbxout.c:flag_minimal_debug is not set, so we have to
2493 detect a fully mangled physname here and set is_stub
2494 accordingly. Fully mangled physnames in v2 start with
2495 the member function name, followed by two underscores.
2496 GCC v3 currently always emits stubbed member functions,
2497 but with fully mangled physnames, which start with _Z. */
2498 if (!(strncmp (new_sublist
->fn_field
.physname
,
2499 main_fn_name
, slen
) == 0
2500 && new_sublist
->fn_field
.physname
[slen
] == '_'
2501 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2503 new_sublist
->fn_field
.is_stub
= 1;
2510 complaint (_("member function type missing, got '%c'"),
2512 /* Normal member function. */
2516 /* normal member function. */
2517 new_sublist
->fn_field
.voffset
= 0;
2518 new_sublist
->fn_field
.fcontext
= 0;
2522 new_sublist
->next
= sublist
;
2523 sublist
= new_sublist
;
2525 STABS_CONTINUE (pp
, objfile
);
2527 while (**pp
!= ';' && **pp
!= '\0');
2530 STABS_CONTINUE (pp
, objfile
);
2532 /* Skip GCC 3.X member functions which are duplicates of the callable
2533 constructor/destructor. */
2534 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2535 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2536 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2538 xfree (main_fn_name
);
2542 int has_destructor
= 0, has_other
= 0;
2544 struct next_fnfield
*tmp_sublist
;
2546 /* Various versions of GCC emit various mostly-useless
2547 strings in the name field for special member functions.
2549 For stub methods, we need to defer correcting the name
2550 until we are ready to unstub the method, because the current
2551 name string is used by gdb_mangle_name. The only stub methods
2552 of concern here are GNU v2 operators; other methods have their
2553 names correct (see caveat below).
2555 For non-stub methods, in GNU v3, we have a complete physname.
2556 Therefore we can safely correct the name now. This primarily
2557 affects constructors and destructors, whose name will be
2558 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2559 operators will also have incorrect names; for instance,
2560 "operator int" will be named "operator i" (i.e. the type is
2563 For non-stub methods in GNU v2, we have no easy way to
2564 know if we have a complete physname or not. For most
2565 methods the result depends on the platform (if CPLUS_MARKER
2566 can be `$' or `.', it will use minimal debug information, or
2567 otherwise the full physname will be included).
2569 Rather than dealing with this, we take a different approach.
2570 For v3 mangled names, we can use the full physname; for v2,
2571 we use cplus_demangle_opname (which is actually v2 specific),
2572 because the only interesting names are all operators - once again
2573 barring the caveat below. Skip this process if any method in the
2574 group is a stub, to prevent our fouling up the workings of
2577 The caveat: GCC 2.95.x (and earlier?) put constructors and
2578 destructors in the same method group. We need to split this
2579 into two groups, because they should have different names.
2580 So for each method group we check whether it contains both
2581 routines whose physname appears to be a destructor (the physnames
2582 for and destructors are always provided, due to quirks in v2
2583 mangling) and routines whose physname does not appear to be a
2584 destructor. If so then we break up the list into two halves.
2585 Even if the constructors and destructors aren't in the same group
2586 the destructor will still lack the leading tilde, so that also
2589 So, to summarize what we expect and handle here:
2591 Given Given Real Real Action
2592 method name physname physname method name
2594 __opi [none] __opi__3Foo operator int opname
2596 Foo _._3Foo _._3Foo ~Foo separate and
2598 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2599 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2602 tmp_sublist
= sublist
;
2603 while (tmp_sublist
!= NULL
)
2605 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2606 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2609 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2614 tmp_sublist
= tmp_sublist
->next
;
2617 if (has_destructor
&& has_other
)
2619 struct next_fnfieldlist
*destr_fnlist
;
2620 struct next_fnfield
*last_sublist
;
2622 /* Create a new fn_fieldlist for the destructors. */
2624 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2625 struct next_fnfieldlist
);
2627 destr_fnlist
->fn_fieldlist
.name
2628 = obconcat (&objfile
->objfile_obstack
, "~",
2629 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2631 destr_fnlist
->fn_fieldlist
.fn_fields
=
2632 XOBNEWVEC (&objfile
->objfile_obstack
,
2633 struct fn_field
, has_destructor
);
2634 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2635 sizeof (struct fn_field
) * has_destructor
);
2636 tmp_sublist
= sublist
;
2637 last_sublist
= NULL
;
2639 while (tmp_sublist
!= NULL
)
2641 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2643 tmp_sublist
= tmp_sublist
->next
;
2647 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2648 = tmp_sublist
->fn_field
;
2650 last_sublist
->next
= tmp_sublist
->next
;
2652 sublist
= tmp_sublist
->next
;
2653 last_sublist
= tmp_sublist
;
2654 tmp_sublist
= tmp_sublist
->next
;
2657 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2658 destr_fnlist
->next
= fip
->fnlist
;
2659 fip
->fnlist
= destr_fnlist
;
2661 length
-= has_destructor
;
2665 /* v3 mangling prevents the use of abbreviated physnames,
2666 so we can do this here. There are stubbed methods in v3
2668 - in -gstabs instead of -gstabs+
2669 - or for static methods, which are output as a function type
2670 instead of a method type. */
2671 char *new_method_name
=
2672 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2674 if (new_method_name
!= NULL
2675 && strcmp (new_method_name
,
2676 new_fnlist
->fn_fieldlist
.name
) != 0)
2678 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2679 xfree (main_fn_name
);
2682 xfree (new_method_name
);
2684 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2686 new_fnlist
->fn_fieldlist
.name
=
2687 obconcat (&objfile
->objfile_obstack
,
2688 "~", main_fn_name
, (char *)NULL
);
2689 xfree (main_fn_name
);
2692 new_fnlist
->fn_fieldlist
.fn_fields
2693 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2694 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2696 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2699 new_fnlist
->fn_fieldlist
.length
= length
;
2700 new_fnlist
->next
= fip
->fnlist
;
2701 fip
->fnlist
= new_fnlist
;
2708 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2709 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2710 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2711 memset (TYPE_FN_FIELDLISTS (type
), 0,
2712 sizeof (struct fn_fieldlist
) * nfn_fields
);
2713 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2719 /* Special GNU C++ name.
2721 Returns 1 for success, 0 for failure. "failure" means that we can't
2722 keep parsing and it's time for error_type(). */
2725 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2726 struct type
*type
, struct objfile
*objfile
)
2731 struct type
*context
;
2741 /* At this point, *pp points to something like "22:23=*22...",
2742 where the type number before the ':' is the "context" and
2743 everything after is a regular type definition. Lookup the
2744 type, find it's name, and construct the field name. */
2746 context
= read_type (pp
, objfile
);
2750 case 'f': /* $vf -- a virtual function table pointer */
2751 name
= context
->name ();
2756 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2757 vptr_name
, name
, (char *) NULL
);
2760 case 'b': /* $vb -- a virtual bsomethingorother */
2761 name
= context
->name ();
2764 complaint (_("C++ abbreviated type name "
2765 "unknown at symtab pos %d"),
2769 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
, vb_name
,
2770 name
, (char *) NULL
);
2774 invalid_cpp_abbrev_complaint (*pp
);
2775 fip
->list
->field
.name
= obconcat (&objfile
->objfile_obstack
,
2776 "INVALID_CPLUSPLUS_ABBREV",
2781 /* At this point, *pp points to the ':'. Skip it and read the
2787 invalid_cpp_abbrev_complaint (*pp
);
2790 fip
->list
->field
.type
= read_type (pp
, objfile
);
2792 (*pp
)++; /* Skip the comma. */
2799 SET_FIELD_BITPOS (fip
->list
->field
,
2800 read_huge_number (pp
, ';', &nbits
, 0));
2804 /* This field is unpacked. */
2805 FIELD_BITSIZE (fip
->list
->field
) = 0;
2806 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2810 invalid_cpp_abbrev_complaint (*pp
);
2811 /* We have no idea what syntax an unrecognized abbrev would have, so
2812 better return 0. If we returned 1, we would need to at least advance
2813 *pp to avoid an infinite loop. */
2820 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2821 const char *p
, struct type
*type
,
2822 struct objfile
*objfile
)
2824 struct gdbarch
*gdbarch
= objfile
->arch ();
2826 fip
->list
->field
.name
2827 = obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
2830 /* This means we have a visibility for a field coming. */
2834 fip
->list
->visibility
= *(*pp
)++;
2838 /* normal dbx-style format, no explicit visibility */
2839 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2842 fip
->list
->field
.type
= read_type (pp
, objfile
);
2847 /* Possible future hook for nested types. */
2850 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2860 /* Static class member. */
2861 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2865 else if (**pp
!= ',')
2867 /* Bad structure-type format. */
2868 stabs_general_complaint ("bad structure-type format");
2872 (*pp
)++; /* Skip the comma. */
2877 SET_FIELD_BITPOS (fip
->list
->field
,
2878 read_huge_number (pp
, ',', &nbits
, 0));
2881 stabs_general_complaint ("bad structure-type format");
2884 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2887 stabs_general_complaint ("bad structure-type format");
2892 if (FIELD_BITPOS (fip
->list
->field
) == 0
2893 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2895 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2896 it is a field which has been optimized out. The correct stab for
2897 this case is to use VISIBILITY_IGNORE, but that is a recent
2898 invention. (2) It is a 0-size array. For example
2899 union { int num; char str[0]; } foo. Printing _("<no value>" for
2900 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2901 will continue to work, and a 0-size array as a whole doesn't
2902 have any contents to print.
2904 I suspect this probably could also happen with gcc -gstabs (not
2905 -gstabs+) for static fields, and perhaps other C++ extensions.
2906 Hopefully few people use -gstabs with gdb, since it is intended
2907 for dbx compatibility. */
2909 /* Ignore this field. */
2910 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2914 /* Detect an unpacked field and mark it as such.
2915 dbx gives a bit size for all fields.
2916 Note that forward refs cannot be packed,
2917 and treat enums as if they had the width of ints. */
2919 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2921 if (field_type
->code () != TYPE_CODE_INT
2922 && field_type
->code () != TYPE_CODE_RANGE
2923 && field_type
->code () != TYPE_CODE_BOOL
2924 && field_type
->code () != TYPE_CODE_ENUM
)
2926 FIELD_BITSIZE (fip
->list
->field
) = 0;
2928 if ((FIELD_BITSIZE (fip
->list
->field
)
2929 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2930 || (field_type
->code () == TYPE_CODE_ENUM
2931 && FIELD_BITSIZE (fip
->list
->field
)
2932 == gdbarch_int_bit (gdbarch
))
2935 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2937 FIELD_BITSIZE (fip
->list
->field
) = 0;
2943 /* Read struct or class data fields. They have the form:
2945 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2947 At the end, we see a semicolon instead of a field.
2949 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2952 The optional VISIBILITY is one of:
2954 '/0' (VISIBILITY_PRIVATE)
2955 '/1' (VISIBILITY_PROTECTED)
2956 '/2' (VISIBILITY_PUBLIC)
2957 '/9' (VISIBILITY_IGNORE)
2959 or nothing, for C style fields with public visibility.
2961 Returns 1 for success, 0 for failure. */
2964 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2965 struct type
*type
, struct objfile
*objfile
)
2968 struct nextfield
*newobj
;
2970 /* We better set p right now, in case there are no fields at all... */
2974 /* Read each data member type until we find the terminating ';' at the end of
2975 the data member list, or break for some other reason such as finding the
2976 start of the member function list. */
2977 /* Stab string for structure/union does not end with two ';' in
2978 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2980 while (**pp
!= ';' && **pp
!= '\0')
2982 STABS_CONTINUE (pp
, objfile
);
2983 /* Get space to record the next field's data. */
2984 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
2986 newobj
->next
= fip
->list
;
2989 /* Get the field name. */
2992 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2993 unless the CPLUS_MARKER is followed by an underscore, in
2994 which case it is just the name of an anonymous type, which we
2995 should handle like any other type name. */
2997 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2999 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
3004 /* Look for the ':' that separates the field name from the field
3005 values. Data members are delimited by a single ':', while member
3006 functions are delimited by a pair of ':'s. When we hit the member
3007 functions (if any), terminate scan loop and return. */
3009 while (*p
!= ':' && *p
!= '\0')
3016 /* Check to see if we have hit the member functions yet. */
3021 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3023 if (p
[0] == ':' && p
[1] == ':')
3025 /* (the deleted) chill the list of fields: the last entry (at
3026 the head) is a partially constructed entry which we now
3028 fip
->list
= fip
->list
->next
;
3033 /* The stabs for C++ derived classes contain baseclass information which
3034 is marked by a '!' character after the total size. This function is
3035 called when we encounter the baseclass marker, and slurps up all the
3036 baseclass information.
3038 Immediately following the '!' marker is the number of base classes that
3039 the class is derived from, followed by information for each base class.
3040 For each base class, there are two visibility specifiers, a bit offset
3041 to the base class information within the derived class, a reference to
3042 the type for the base class, and a terminating semicolon.
3044 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3046 Baseclass information marker __________________|| | | | | | |
3047 Number of baseclasses __________________________| | | | | | |
3048 Visibility specifiers (2) ________________________| | | | | |
3049 Offset in bits from start of class _________________| | | | |
3050 Type number for base class ___________________________| | | |
3051 Visibility specifiers (2) _______________________________| | |
3052 Offset in bits from start of class ________________________| |
3053 Type number of base class ____________________________________|
3055 Return 1 for success, 0 for (error-type-inducing) failure. */
3061 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3062 struct type
*type
, struct objfile
*objfile
)
3065 struct nextfield
*newobj
;
3073 /* Skip the '!' baseclass information marker. */
3077 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3081 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3087 /* Some stupid compilers have trouble with the following, so break
3088 it up into simpler expressions. */
3089 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3090 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3093 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3096 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3097 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3101 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3103 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3105 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct nextfield
);
3107 newobj
->next
= fip
->list
;
3109 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3112 STABS_CONTINUE (pp
, objfile
);
3116 /* Nothing to do. */
3119 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3122 /* Unknown character. Complain and treat it as non-virtual. */
3124 complaint (_("Unknown virtual character `%c' for baseclass"),
3130 newobj
->visibility
= *(*pp
)++;
3131 switch (newobj
->visibility
)
3133 case VISIBILITY_PRIVATE
:
3134 case VISIBILITY_PROTECTED
:
3135 case VISIBILITY_PUBLIC
:
3138 /* Bad visibility format. Complain and treat it as
3141 complaint (_("Unknown visibility `%c' for baseclass"),
3142 newobj
->visibility
);
3143 newobj
->visibility
= VISIBILITY_PUBLIC
;
3150 /* The remaining value is the bit offset of the portion of the object
3151 corresponding to this baseclass. Always zero in the absence of
3152 multiple inheritance. */
3154 SET_FIELD_BITPOS (newobj
->field
, read_huge_number (pp
, ',', &nbits
, 0));
3159 /* The last piece of baseclass information is the type of the
3160 base class. Read it, and remember it's type name as this
3163 newobj
->field
.type
= read_type (pp
, objfile
);
3164 newobj
->field
.name
= newobj
->field
.type
->name ();
3166 /* Skip trailing ';' and bump count of number of fields seen. */
3175 /* The tail end of stabs for C++ classes that contain a virtual function
3176 pointer contains a tilde, a %, and a type number.
3177 The type number refers to the base class (possibly this class itself) which
3178 contains the vtable pointer for the current class.
3180 This function is called when we have parsed all the method declarations,
3181 so we can look for the vptr base class info. */
3184 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3185 struct type
*type
, struct objfile
*objfile
)
3189 STABS_CONTINUE (pp
, objfile
);
3191 /* If we are positioned at a ';', then skip it. */
3201 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3203 /* Obsolete flags that used to indicate the presence
3204 of constructors and/or destructors. */
3208 /* Read either a '%' or the final ';'. */
3209 if (*(*pp
)++ == '%')
3211 /* The next number is the type number of the base class
3212 (possibly our own class) which supplies the vtable for
3213 this class. Parse it out, and search that class to find
3214 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3215 and TYPE_VPTR_FIELDNO. */
3220 t
= read_type (pp
, objfile
);
3222 while (*p
!= '\0' && *p
!= ';')
3228 /* Premature end of symbol. */
3232 set_type_vptr_basetype (type
, t
);
3233 if (type
== t
) /* Our own class provides vtbl ptr. */
3235 for (i
= t
->num_fields () - 1;
3236 i
>= TYPE_N_BASECLASSES (t
);
3239 const char *name
= TYPE_FIELD_NAME (t
, i
);
3241 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3242 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3244 set_type_vptr_fieldno (type
, i
);
3248 /* Virtual function table field not found. */
3249 complaint (_("virtual function table pointer "
3250 "not found when defining class `%s'"),
3256 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3267 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3271 for (n
= TYPE_NFN_FIELDS (type
);
3272 fip
->fnlist
!= NULL
;
3273 fip
->fnlist
= fip
->fnlist
->next
)
3275 --n
; /* Circumvent Sun3 compiler bug. */
3276 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3281 /* Create the vector of fields, and record how big it is.
3282 We need this info to record proper virtual function table information
3283 for this class's virtual functions. */
3286 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3287 struct objfile
*objfile
)
3290 int non_public_fields
= 0;
3291 struct nextfield
*scan
;
3293 /* Count up the number of fields that we have, as well as taking note of
3294 whether or not there are any non-public fields, which requires us to
3295 allocate and build the private_field_bits and protected_field_bits
3298 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3301 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3303 non_public_fields
++;
3307 /* Now we know how many fields there are, and whether or not there are any
3308 non-public fields. Record the field count, allocate space for the
3309 array of fields, and create blank visibility bitfields if necessary. */
3311 type
->set_num_fields (nfields
);
3312 TYPE_FIELDS (type
) = (struct field
*)
3313 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3314 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3316 if (non_public_fields
)
3318 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3320 TYPE_FIELD_PRIVATE_BITS (type
) =
3321 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3322 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3324 TYPE_FIELD_PROTECTED_BITS (type
) =
3325 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3326 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3328 TYPE_FIELD_IGNORE_BITS (type
) =
3329 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3330 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3333 /* Copy the saved-up fields into the field vector. Start from the
3334 head of the list, adding to the tail of the field array, so that
3335 they end up in the same order in the array in which they were
3336 added to the list. */
3338 while (nfields
-- > 0)
3340 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3341 switch (fip
->list
->visibility
)
3343 case VISIBILITY_PRIVATE
:
3344 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3347 case VISIBILITY_PROTECTED
:
3348 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3351 case VISIBILITY_IGNORE
:
3352 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3355 case VISIBILITY_PUBLIC
:
3359 /* Unknown visibility. Complain and treat it as public. */
3361 complaint (_("Unknown visibility `%c' for field"),
3362 fip
->list
->visibility
);
3366 fip
->list
= fip
->list
->next
;
3372 /* Complain that the compiler has emitted more than one definition for the
3373 structure type TYPE. */
3375 complain_about_struct_wipeout (struct type
*type
)
3377 const char *name
= "";
3378 const char *kind
= "";
3382 name
= type
->name ();
3383 switch (type
->code ())
3385 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3386 case TYPE_CODE_UNION
: kind
= "union "; break;
3387 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3397 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3400 /* Set the length for all variants of a same main_type, which are
3401 connected in the closed chain.
3403 This is something that needs to be done when a type is defined *after*
3404 some cross references to this type have already been read. Consider
3405 for instance the following scenario where we have the following two
3408 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3409 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3411 A stubbed version of type dummy is created while processing the first
3412 stabs entry. The length of that type is initially set to zero, since
3413 it is unknown at this point. Also, a "constant" variation of type
3414 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3417 The second stabs entry allows us to replace the stubbed definition
3418 with the real definition. However, we still need to adjust the length
3419 of the "constant" variation of that type, as its length was left
3420 untouched during the main type replacement... */
3423 set_length_in_type_chain (struct type
*type
)
3425 struct type
*ntype
= TYPE_CHAIN (type
);
3427 while (ntype
!= type
)
3429 if (TYPE_LENGTH(ntype
) == 0)
3430 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
3432 complain_about_struct_wipeout (ntype
);
3433 ntype
= TYPE_CHAIN (ntype
);
3437 /* Read the description of a structure (or union type) and return an object
3438 describing the type.
3440 PP points to a character pointer that points to the next unconsumed token
3441 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3442 *PP will point to "4a:1,0,32;;".
3444 TYPE points to an incomplete type that needs to be filled in.
3446 OBJFILE points to the current objfile from which the stabs information is
3447 being read. (Note that it is redundant in that TYPE also contains a pointer
3448 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3451 static struct type
*
3452 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3453 struct objfile
*objfile
)
3455 struct stab_field_info fi
;
3457 /* When describing struct/union/class types in stabs, G++ always drops
3458 all qualifications from the name. So if you've got:
3459 struct A { ... struct B { ... }; ... };
3460 then G++ will emit stabs for `struct A::B' that call it simply
3461 `struct B'. Obviously, if you've got a real top-level definition for
3462 `struct B', or other nested definitions, this is going to cause
3465 Obviously, GDB can't fix this by itself, but it can at least avoid
3466 scribbling on existing structure type objects when new definitions
3468 if (! (type
->code () == TYPE_CODE_UNDEF
3469 || TYPE_STUB (type
)))
3471 complain_about_struct_wipeout (type
);
3473 /* It's probably best to return the type unchanged. */
3477 INIT_CPLUS_SPECIFIC (type
);
3478 type
->set_code (type_code
);
3479 TYPE_STUB (type
) = 0;
3481 /* First comes the total size in bytes. */
3486 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3488 return error_type (pp
, objfile
);
3489 set_length_in_type_chain (type
);
3492 /* Now read the baseclasses, if any, read the regular C struct or C++
3493 class member fields, attach the fields to the type, read the C++
3494 member functions, attach them to the type, and then read any tilde
3495 field (baseclass specifier for the class holding the main vtable). */
3497 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3498 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3499 || !attach_fields_to_type (&fi
, type
, objfile
)
3500 || !read_member_functions (&fi
, pp
, type
, objfile
)
3501 || !attach_fn_fields_to_type (&fi
, type
)
3502 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3504 type
= error_type (pp
, objfile
);
3510 /* Read a definition of an array type,
3511 and create and return a suitable type object.
3512 Also creates a range type which represents the bounds of that
3515 static struct type
*
3516 read_array_type (const char **pp
, struct type
*type
,
3517 struct objfile
*objfile
)
3519 struct type
*index_type
, *element_type
, *range_type
;
3524 /* Format of an array type:
3525 "ar<index type>;lower;upper;<array_contents_type>".
3526 OS9000: "arlower,upper;<array_contents_type>".
3528 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3529 for these, produce a type like float[][]. */
3532 index_type
= read_type (pp
, objfile
);
3534 /* Improper format of array type decl. */
3535 return error_type (pp
, objfile
);
3539 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3544 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3547 return error_type (pp
, objfile
);
3549 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3554 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3556 return error_type (pp
, objfile
);
3558 element_type
= read_type (pp
, objfile
);
3567 create_static_range_type (NULL
, index_type
, lower
, upper
);
3568 type
= create_array_type (type
, element_type
, range_type
);
3574 /* Read a definition of an enumeration type,
3575 and create and return a suitable type object.
3576 Also defines the symbols that represent the values of the type. */
3578 static struct type
*
3579 read_enum_type (const char **pp
, struct type
*type
,
3580 struct objfile
*objfile
)
3582 struct gdbarch
*gdbarch
= objfile
->arch ();
3588 struct pending
**symlist
;
3589 struct pending
*osyms
, *syms
;
3592 int unsigned_enum
= 1;
3595 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3596 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3597 to do? For now, force all enum values to file scope. */
3598 if (within_function
)
3599 symlist
= get_local_symbols ();
3602 symlist
= get_file_symbols ();
3604 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3606 /* The aix4 compiler emits an extra field before the enum members;
3607 my guess is it's a type of some sort. Just ignore it. */
3610 /* Skip over the type. */
3614 /* Skip over the colon. */
3618 /* Read the value-names and their values.
3619 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3620 A semicolon or comma instead of a NAME means the end. */
3621 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3623 STABS_CONTINUE (pp
, objfile
);
3627 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3629 n
= read_huge_number (pp
, ',', &nbits
, 0);
3631 return error_type (pp
, objfile
);
3633 sym
= new (&objfile
->objfile_obstack
) symbol
;
3634 sym
->set_linkage_name (name
);
3635 sym
->set_language (get_current_subfile ()->language
,
3636 &objfile
->objfile_obstack
);
3637 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
3638 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3639 SYMBOL_VALUE (sym
) = n
;
3642 add_symbol_to_list (sym
, symlist
);
3647 (*pp
)++; /* Skip the semicolon. */
3649 /* Now fill in the fields of the type-structure. */
3651 TYPE_LENGTH (type
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
3652 set_length_in_type_chain (type
);
3653 type
->set_code (TYPE_CODE_ENUM
);
3654 TYPE_STUB (type
) = 0;
3656 TYPE_UNSIGNED (type
) = 1;
3657 type
->set_num_fields (nsyms
);
3658 TYPE_FIELDS (type
) = (struct field
*)
3659 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3660 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3662 /* Find the symbols for the values and put them into the type.
3663 The symbols can be found in the symlist that we put them on
3664 to cause them to be defined. osyms contains the old value
3665 of that symlist; everything up to there was defined by us. */
3666 /* Note that we preserve the order of the enum constants, so
3667 that in something like "enum {FOO, LAST_THING=FOO}" we print
3668 FOO, not LAST_THING. */
3670 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3672 int last
= syms
== osyms
? o_nsyms
: 0;
3673 int j
= syms
->nsyms
;
3675 for (; --j
>= last
; --n
)
3677 struct symbol
*xsym
= syms
->symbol
[j
];
3679 SYMBOL_TYPE (xsym
) = type
;
3680 TYPE_FIELD_NAME (type
, n
) = xsym
->linkage_name ();
3681 SET_FIELD_ENUMVAL (TYPE_FIELD (type
, n
), SYMBOL_VALUE (xsym
));
3682 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3691 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3692 typedefs in every file (for int, long, etc):
3694 type = b <signed> <width> <format type>; <offset>; <nbits>
3696 optional format type = c or b for char or boolean.
3697 offset = offset from high order bit to start bit of type.
3698 width is # bytes in object of this type, nbits is # bits in type.
3700 The width/offset stuff appears to be for small objects stored in
3701 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3704 static struct type
*
3705 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3710 int boolean_type
= 0;
3721 return error_type (pp
, objfile
);
3725 /* For some odd reason, all forms of char put a c here. This is strange
3726 because no other type has this honor. We can safely ignore this because
3727 we actually determine 'char'acterness by the number of bits specified in
3729 Boolean forms, e.g Fortran logical*X, put a b here. */
3733 else if (**pp
== 'b')
3739 /* The first number appears to be the number of bytes occupied
3740 by this type, except that unsigned short is 4 instead of 2.
3741 Since this information is redundant with the third number,
3742 we will ignore it. */
3743 read_huge_number (pp
, ';', &nbits
, 0);
3745 return error_type (pp
, objfile
);
3747 /* The second number is always 0, so ignore it too. */
3748 read_huge_number (pp
, ';', &nbits
, 0);
3750 return error_type (pp
, objfile
);
3752 /* The third number is the number of bits for this type. */
3753 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3755 return error_type (pp
, objfile
);
3756 /* The type *should* end with a semicolon. If it are embedded
3757 in a larger type the semicolon may be the only way to know where
3758 the type ends. If this type is at the end of the stabstring we
3759 can deal with the omitted semicolon (but we don't have to like
3760 it). Don't bother to complain(), Sun's compiler omits the semicolon
3767 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3768 TARGET_CHAR_BIT
, NULL
);
3770 TYPE_UNSIGNED (type
) = 1;
3775 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3777 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3780 static struct type
*
3781 read_sun_floating_type (const char **pp
, int typenums
[2],
3782 struct objfile
*objfile
)
3787 struct type
*rettype
;
3789 /* The first number has more details about the type, for example
3791 details
= read_huge_number (pp
, ';', &nbits
, 0);
3793 return error_type (pp
, objfile
);
3795 /* The second number is the number of bytes occupied by this type. */
3796 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3798 return error_type (pp
, objfile
);
3800 nbits
= nbytes
* TARGET_CHAR_BIT
;
3802 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3803 || details
== NF_COMPLEX32
)
3805 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3806 return init_complex_type (NULL
, rettype
);
3809 return dbx_init_float_type (objfile
, nbits
);
3812 /* Read a number from the string pointed to by *PP.
3813 The value of *PP is advanced over the number.
3814 If END is nonzero, the character that ends the
3815 number must match END, or an error happens;
3816 and that character is skipped if it does match.
3817 If END is zero, *PP is left pointing to that character.
3819 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3820 the number is represented in an octal representation, assume that
3821 it is represented in a 2's complement representation with a size of
3822 TWOS_COMPLEMENT_BITS.
3824 If the number fits in a long, set *BITS to 0 and return the value.
3825 If not, set *BITS to be the number of bits in the number and return 0.
3827 If encounter garbage, set *BITS to -1 and return 0. */
3830 read_huge_number (const char **pp
, int end
, int *bits
,
3831 int twos_complement_bits
)
3833 const char *p
= *pp
;
3842 int twos_complement_representation
= 0;
3850 /* Leading zero means octal. GCC uses this to output values larger
3851 than an int (because that would be hard in decimal). */
3858 /* Skip extra zeros. */
3862 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3864 /* Octal, possibly signed. Check if we have enough chars for a
3870 while ((c
= *p1
) >= '0' && c
< '8')
3874 if (len
> twos_complement_bits
/ 3
3875 || (twos_complement_bits
% 3 == 0
3876 && len
== twos_complement_bits
/ 3))
3878 /* Ok, we have enough characters for a signed value, check
3879 for signedness by testing if the sign bit is set. */
3880 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3882 if (c
& (1 << sign_bit
))
3884 /* Definitely signed. */
3885 twos_complement_representation
= 1;
3891 upper_limit
= LONG_MAX
/ radix
;
3893 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3895 if (n
<= upper_limit
)
3897 if (twos_complement_representation
)
3899 /* Octal, signed, twos complement representation. In
3900 this case, n is the corresponding absolute value. */
3903 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3915 /* unsigned representation */
3917 n
+= c
- '0'; /* FIXME this overflows anyway. */
3923 /* This depends on large values being output in octal, which is
3930 /* Ignore leading zeroes. */
3934 else if (c
== '2' || c
== '3')
3955 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3957 /* We were supposed to parse a number with maximum
3958 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3969 /* Large decimal constants are an error (because it is hard to
3970 count how many bits are in them). */
3976 /* -0x7f is the same as 0x80. So deal with it by adding one to
3977 the number of bits. Two's complement represention octals
3978 can't have a '-' in front. */
3979 if (sign
== -1 && !twos_complement_representation
)
3990 /* It's *BITS which has the interesting information. */
3994 static struct type
*
3995 read_range_type (const char **pp
, int typenums
[2], int type_size
,
3996 struct objfile
*objfile
)
3998 struct gdbarch
*gdbarch
= objfile
->arch ();
3999 const char *orig_pp
= *pp
;
4004 struct type
*result_type
;
4005 struct type
*index_type
= NULL
;
4007 /* First comes a type we are a subrange of.
4008 In C it is usually 0, 1 or the type being defined. */
4009 if (read_type_number (pp
, rangenums
) != 0)
4010 return error_type (pp
, objfile
);
4011 self_subrange
= (rangenums
[0] == typenums
[0] &&
4012 rangenums
[1] == typenums
[1]);
4017 index_type
= read_type (pp
, objfile
);
4020 /* A semicolon should now follow; skip it. */
4024 /* The remaining two operands are usually lower and upper bounds
4025 of the range. But in some special cases they mean something else. */
4026 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4027 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4029 if (n2bits
== -1 || n3bits
== -1)
4030 return error_type (pp
, objfile
);
4033 goto handle_true_range
;
4035 /* If limits are huge, must be large integral type. */
4036 if (n2bits
!= 0 || n3bits
!= 0)
4038 char got_signed
= 0;
4039 char got_unsigned
= 0;
4040 /* Number of bits in the type. */
4043 /* If a type size attribute has been specified, the bounds of
4044 the range should fit in this size. If the lower bounds needs
4045 more bits than the upper bound, then the type is signed. */
4046 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4048 if (n2bits
== type_size
&& n2bits
> n3bits
)
4054 /* Range from 0 to <large number> is an unsigned large integral type. */
4055 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4060 /* Range from <large number> to <large number>-1 is a large signed
4061 integral type. Take care of the case where <large number> doesn't
4062 fit in a long but <large number>-1 does. */
4063 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4064 || (n2bits
!= 0 && n3bits
== 0
4065 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4072 if (got_signed
|| got_unsigned
)
4073 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4075 return error_type (pp
, objfile
);
4078 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4079 if (self_subrange
&& n2
== 0 && n3
== 0)
4080 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4082 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4083 is the width in bytes.
4085 Fortran programs appear to use this for complex types also. To
4086 distinguish between floats and complex, g77 (and others?) seem
4087 to use self-subranges for the complexes, and subranges of int for
4090 Also note that for complexes, g77 sets n2 to the size of one of
4091 the member floats, not the whole complex beast. My guess is that
4092 this was to work well with pre-COMPLEX versions of gdb. */
4094 if (n3
== 0 && n2
> 0)
4096 struct type
*float_type
4097 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4100 return init_complex_type (NULL
, float_type
);
4105 /* If the upper bound is -1, it must really be an unsigned integral. */
4107 else if (n2
== 0 && n3
== -1)
4109 int bits
= type_size
;
4113 /* We don't know its size. It is unsigned int or unsigned
4114 long. GCC 2.3.3 uses this for long long too, but that is
4115 just a GDB 3.5 compatibility hack. */
4116 bits
= gdbarch_int_bit (gdbarch
);
4119 return init_integer_type (objfile
, bits
, 1, NULL
);
4122 /* Special case: char is defined (Who knows why) as a subrange of
4123 itself with range 0-127. */
4124 else if (self_subrange
&& n2
== 0 && n3
== 127)
4126 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4128 TYPE_NOSIGN (type
) = 1;
4131 /* We used to do this only for subrange of self or subrange of int. */
4134 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4135 "unsigned long", and we already checked for that,
4136 so don't need to test for it here. */
4139 /* n3 actually gives the size. */
4140 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4142 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4143 unsigned n-byte integer. But do require n to be a power of
4144 two; we don't want 3- and 5-byte integers flying around. */
4150 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4153 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4154 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4157 /* I think this is for Convex "long long". Since I don't know whether
4158 Convex sets self_subrange, I also accept that particular size regardless
4159 of self_subrange. */
4160 else if (n3
== 0 && n2
< 0
4162 || n2
== -gdbarch_long_long_bit
4163 (gdbarch
) / TARGET_CHAR_BIT
))
4164 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4165 else if (n2
== -n3
- 1)
4168 return init_integer_type (objfile
, 8, 0, NULL
);
4170 return init_integer_type (objfile
, 16, 0, NULL
);
4171 if (n3
== 0x7fffffff)
4172 return init_integer_type (objfile
, 32, 0, NULL
);
4175 /* We have a real range type on our hands. Allocate space and
4176 return a real pointer. */
4180 index_type
= objfile_type (objfile
)->builtin_int
;
4182 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4183 if (index_type
== NULL
)
4185 /* Does this actually ever happen? Is that why we are worrying
4186 about dealing with it rather than just calling error_type? */
4188 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4190 index_type
= objfile_type (objfile
)->builtin_int
;
4194 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4195 return (result_type
);
4198 /* Read in an argument list. This is a list of types, separated by commas
4199 and terminated with END. Return the list of types read in, or NULL
4200 if there is an error. */
4202 static struct field
*
4203 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4206 /* FIXME! Remove this arbitrary limit! */
4207 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4214 /* Invalid argument list: no ','. */
4217 STABS_CONTINUE (pp
, objfile
);
4218 types
[n
++] = read_type (pp
, objfile
);
4220 (*pp
)++; /* get past `end' (the ':' character). */
4224 /* We should read at least the THIS parameter here. Some broken stabs
4225 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4226 have been present ";-16,(0,43)" reference instead. This way the
4227 excessive ";" marker prematurely stops the parameters parsing. */
4229 complaint (_("Invalid (empty) method arguments"));
4232 else if (types
[n
- 1]->code () != TYPE_CODE_VOID
)
4240 rval
= XCNEWVEC (struct field
, n
);
4241 for (i
= 0; i
< n
; i
++)
4242 rval
[i
].type
= types
[i
];
4247 /* Common block handling. */
4249 /* List of symbols declared since the last BCOMM. This list is a tail
4250 of local_symbols. When ECOMM is seen, the symbols on the list
4251 are noted so their proper addresses can be filled in later,
4252 using the common block base address gotten from the assembler
4255 static struct pending
*common_block
;
4256 static int common_block_i
;
4258 /* Name of the current common block. We get it from the BCOMM instead of the
4259 ECOMM to match IBM documentation (even though IBM puts the name both places
4260 like everyone else). */
4261 static char *common_block_name
;
4263 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4264 to remain after this function returns. */
4267 common_block_start (const char *name
, struct objfile
*objfile
)
4269 if (common_block_name
!= NULL
)
4271 complaint (_("Invalid symbol data: common block within common block"));
4273 common_block
= *get_local_symbols ();
4274 common_block_i
= common_block
? common_block
->nsyms
: 0;
4275 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4278 /* Process a N_ECOMM symbol. */
4281 common_block_end (struct objfile
*objfile
)
4283 /* Symbols declared since the BCOMM are to have the common block
4284 start address added in when we know it. common_block and
4285 common_block_i point to the first symbol after the BCOMM in
4286 the local_symbols list; copy the list and hang it off the
4287 symbol for the common block name for later fixup. */
4290 struct pending
*newobj
= 0;
4291 struct pending
*next
;
4294 if (common_block_name
== NULL
)
4296 complaint (_("ECOMM symbol unmatched by BCOMM"));
4300 sym
= new (&objfile
->objfile_obstack
) symbol
;
4301 /* Note: common_block_name already saved on objfile_obstack. */
4302 sym
->set_linkage_name (common_block_name
);
4303 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
4305 /* Now we copy all the symbols which have been defined since the BCOMM. */
4307 /* Copy all the struct pendings before common_block. */
4308 for (next
= *get_local_symbols ();
4309 next
!= NULL
&& next
!= common_block
;
4312 for (j
= 0; j
< next
->nsyms
; j
++)
4313 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4316 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4317 NULL, it means copy all the local symbols (which we already did
4320 if (common_block
!= NULL
)
4321 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4322 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4324 SYMBOL_TYPE (sym
) = (struct type
*) newobj
;
4326 /* Should we be putting local_symbols back to what it was?
4329 i
= hashname (sym
->linkage_name ());
4330 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4331 global_sym_chain
[i
] = sym
;
4332 common_block_name
= NULL
;
4335 /* Add a common block's start address to the offset of each symbol
4336 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4337 the common block name). */
4340 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
)
4342 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4344 for (; next
; next
= next
->next
)
4348 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4349 SET_SYMBOL_VALUE_ADDRESS (next
->symbol
[j
],
4350 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
])
4357 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4358 See add_undefined_type for more details. */
4361 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4365 nat
.typenums
[0] = typenums
[0];
4366 nat
.typenums
[1] = typenums
[1];
4369 if (noname_undefs_length
== noname_undefs_allocated
)
4371 noname_undefs_allocated
*= 2;
4372 noname_undefs
= (struct nat
*)
4373 xrealloc ((char *) noname_undefs
,
4374 noname_undefs_allocated
* sizeof (struct nat
));
4376 noname_undefs
[noname_undefs_length
++] = nat
;
4379 /* Add TYPE to the UNDEF_TYPES vector.
4380 See add_undefined_type for more details. */
4383 add_undefined_type_1 (struct type
*type
)
4385 if (undef_types_length
== undef_types_allocated
)
4387 undef_types_allocated
*= 2;
4388 undef_types
= (struct type
**)
4389 xrealloc ((char *) undef_types
,
4390 undef_types_allocated
* sizeof (struct type
*));
4392 undef_types
[undef_types_length
++] = type
;
4395 /* What about types defined as forward references inside of a small lexical
4397 /* Add a type to the list of undefined types to be checked through
4398 once this file has been read in.
4400 In practice, we actually maintain two such lists: The first list
4401 (UNDEF_TYPES) is used for types whose name has been provided, and
4402 concerns forward references (eg 'xs' or 'xu' forward references);
4403 the second list (NONAME_UNDEFS) is used for types whose name is
4404 unknown at creation time, because they were referenced through
4405 their type number before the actual type was declared.
4406 This function actually adds the given type to the proper list. */
4409 add_undefined_type (struct type
*type
, int typenums
[2])
4411 if (type
->name () == NULL
)
4412 add_undefined_type_noname (type
, typenums
);
4414 add_undefined_type_1 (type
);
4417 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4420 cleanup_undefined_types_noname (struct objfile
*objfile
)
4424 for (i
= 0; i
< noname_undefs_length
; i
++)
4426 struct nat nat
= noname_undefs
[i
];
4429 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4430 if (nat
.type
!= *type
&& (*type
)->code () != TYPE_CODE_UNDEF
)
4432 /* The instance flags of the undefined type are still unset,
4433 and needs to be copied over from the reference type.
4434 Since replace_type expects them to be identical, we need
4435 to set these flags manually before hand. */
4436 TYPE_INSTANCE_FLAGS (nat
.type
) = TYPE_INSTANCE_FLAGS (*type
);
4437 replace_type (nat
.type
, *type
);
4441 noname_undefs_length
= 0;
4444 /* Go through each undefined type, see if it's still undefined, and fix it
4445 up if possible. We have two kinds of undefined types:
4447 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4448 Fix: update array length using the element bounds
4449 and the target type's length.
4450 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4451 yet defined at the time a pointer to it was made.
4452 Fix: Do a full lookup on the struct/union tag. */
4455 cleanup_undefined_types_1 (void)
4459 /* Iterate over every undefined type, and look for a symbol whose type
4460 matches our undefined type. The symbol matches if:
4461 1. It is a typedef in the STRUCT domain;
4462 2. It has the same name, and same type code;
4463 3. The instance flags are identical.
4465 It is important to check the instance flags, because we have seen
4466 examples where the debug info contained definitions such as:
4468 "foo_t:t30=B31=xefoo_t:"
4470 In this case, we have created an undefined type named "foo_t" whose
4471 instance flags is null (when processing "xefoo_t"), and then created
4472 another type with the same name, but with different instance flags
4473 ('B' means volatile). I think that the definition above is wrong,
4474 since the same type cannot be volatile and non-volatile at the same
4475 time, but we need to be able to cope with it when it happens. The
4476 approach taken here is to treat these two types as different. */
4478 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4480 switch ((*type
)->code ())
4483 case TYPE_CODE_STRUCT
:
4484 case TYPE_CODE_UNION
:
4485 case TYPE_CODE_ENUM
:
4487 /* Check if it has been defined since. Need to do this here
4488 as well as in check_typedef to deal with the (legitimate in
4489 C though not C++) case of several types with the same name
4490 in different source files. */
4491 if (TYPE_STUB (*type
))
4493 struct pending
*ppt
;
4495 /* Name of the type, without "struct" or "union". */
4496 const char *type_name
= (*type
)->name ();
4498 if (type_name
== NULL
)
4500 complaint (_("need a type name"));
4503 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4505 for (i
= 0; i
< ppt
->nsyms
; i
++)
4507 struct symbol
*sym
= ppt
->symbol
[i
];
4509 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4510 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4511 && (SYMBOL_TYPE (sym
)->code () ==
4513 && (TYPE_INSTANCE_FLAGS (*type
) ==
4514 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym
)))
4515 && strcmp (sym
->linkage_name (), type_name
) == 0)
4516 replace_type (*type
, SYMBOL_TYPE (sym
));
4525 complaint (_("forward-referenced types left unresolved, "
4533 undef_types_length
= 0;
4536 /* Try to fix all the undefined types we encountered while processing
4540 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4542 cleanup_undefined_types_1 ();
4543 cleanup_undefined_types_noname (objfile
);
4546 /* See stabsread.h. */
4549 scan_file_globals (struct objfile
*objfile
)
4552 struct symbol
*sym
, *prev
;
4553 struct objfile
*resolve_objfile
;
4555 /* SVR4 based linkers copy referenced global symbols from shared
4556 libraries to the main executable.
4557 If we are scanning the symbols for a shared library, try to resolve
4558 them from the minimal symbols of the main executable first. */
4560 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4561 resolve_objfile
= symfile_objfile
;
4563 resolve_objfile
= objfile
;
4567 /* Avoid expensive loop through all minimal symbols if there are
4568 no unresolved symbols. */
4569 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4571 if (global_sym_chain
[hash
])
4574 if (hash
>= HASHSIZE
)
4577 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4581 /* Skip static symbols. */
4582 switch (MSYMBOL_TYPE (msymbol
))
4594 /* Get the hash index and check all the symbols
4595 under that hash index. */
4597 hash
= hashname (msymbol
->linkage_name ());
4599 for (sym
= global_sym_chain
[hash
]; sym
;)
4601 if (strcmp (msymbol
->linkage_name (), sym
->linkage_name ()) == 0)
4603 /* Splice this symbol out of the hash chain and
4604 assign the value we have to it. */
4607 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4611 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4614 /* Check to see whether we need to fix up a common block. */
4615 /* Note: this code might be executed several times for
4616 the same symbol if there are multiple references. */
4619 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4621 fix_common_block (sym
,
4622 MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4627 SET_SYMBOL_VALUE_ADDRESS
4628 (sym
, MSYMBOL_VALUE_ADDRESS (resolve_objfile
,
4631 SYMBOL_SECTION (sym
) = MSYMBOL_SECTION (msymbol
);
4636 sym
= SYMBOL_VALUE_CHAIN (prev
);
4640 sym
= global_sym_chain
[hash
];
4646 sym
= SYMBOL_VALUE_CHAIN (sym
);
4650 if (resolve_objfile
== objfile
)
4652 resolve_objfile
= objfile
;
4655 /* Change the storage class of any remaining unresolved globals to
4656 LOC_UNRESOLVED and remove them from the chain. */
4657 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4659 sym
= global_sym_chain
[hash
];
4663 sym
= SYMBOL_VALUE_CHAIN (sym
);
4665 /* Change the symbol address from the misleading chain value
4667 SET_SYMBOL_VALUE_ADDRESS (prev
, 0);
4669 /* Complain about unresolved common block symbols. */
4670 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4671 SYMBOL_ACLASS_INDEX (prev
) = LOC_UNRESOLVED
;
4673 complaint (_("%s: common block `%s' from "
4674 "global_sym_chain unresolved"),
4675 objfile_name (objfile
), prev
->print_name ());
4678 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4681 /* Initialize anything that needs initializing when starting to read
4682 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4686 stabsread_init (void)
4690 /* Initialize anything that needs initializing when a completely new
4691 symbol file is specified (not just adding some symbols from another
4692 file, e.g. a shared library). */
4695 stabsread_new_init (void)
4697 /* Empty the hash table of global syms looking for values. */
4698 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4701 /* Initialize anything that needs initializing at the same time as
4702 start_symtab() is called. */
4707 global_stabs
= NULL
; /* AIX COFF */
4708 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4709 n_this_object_header_files
= 1;
4710 type_vector_length
= 0;
4711 type_vector
= (struct type
**) 0;
4712 within_function
= 0;
4714 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4715 common_block_name
= NULL
;
4718 /* Call after end_symtab(). */
4725 xfree (type_vector
);
4728 type_vector_length
= 0;
4729 previous_stab_code
= 0;
4733 finish_global_stabs (struct objfile
*objfile
)
4737 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4738 xfree (global_stabs
);
4739 global_stabs
= NULL
;
4743 /* Find the end of the name, delimited by a ':', but don't match
4744 ObjC symbols which look like -[Foo bar::]:bla. */
4746 find_name_end (const char *name
)
4748 const char *s
= name
;
4750 if (s
[0] == '-' || *s
== '+')
4752 /* Must be an ObjC method symbol. */
4755 error (_("invalid symbol name \"%s\""), name
);
4757 s
= strchr (s
, ']');
4760 error (_("invalid symbol name \"%s\""), name
);
4762 return strchr (s
, ':');
4766 return strchr (s
, ':');
4770 /* See stabsread.h. */
4773 hashname (const char *name
)
4775 return fast_hash (name
, strlen (name
)) % HASHSIZE
;
4778 /* Initializer for this module. */
4780 void _initialize_stabsread ();
4782 _initialize_stabsread ()
4784 undef_types_allocated
= 20;
4785 undef_types_length
= 0;
4786 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4788 noname_undefs_allocated
= 20;
4789 noname_undefs_length
= 0;
4790 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4792 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4793 &stab_register_funcs
);
4794 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4795 &stab_register_funcs
);