1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986-2023 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 "gdbsupport/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
;
64 struct stabs_nextfield
66 struct stabs_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 stabs_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 int read_type_number (const char **, int *);
112 static struct type
*read_type (const char **, struct objfile
*);
114 static struct type
*read_range_type (const char **, int[2],
115 int, struct objfile
*);
117 static struct type
*read_sun_builtin_type (const char **,
118 int[2], struct objfile
*);
120 static struct type
*read_sun_floating_type (const char **, int[2],
123 static struct type
*read_enum_type (const char **, struct type
*, struct objfile
*);
125 static struct type
*rs6000_builtin_type (int, struct objfile
*);
128 read_member_functions (struct stab_field_info
*, const char **, struct type
*,
132 read_struct_fields (struct stab_field_info
*, const char **, struct type
*,
136 read_baseclasses (struct stab_field_info
*, const char **, struct type
*,
140 read_tilde_fields (struct stab_field_info
*, const char **, struct type
*,
143 static int attach_fn_fields_to_type (struct stab_field_info
*, struct type
*);
145 static int attach_fields_to_type (struct stab_field_info
*, struct type
*,
148 static struct type
*read_struct_type (const char **, struct type
*,
152 static struct type
*read_array_type (const char **, struct type
*,
155 static struct field
*read_args (const char **, int, struct objfile
*,
158 static void add_undefined_type (struct type
*, int[2]);
161 read_cpp_abbrev (struct stab_field_info
*, const char **, struct type
*,
164 static const char *find_name_end (const char *name
);
166 static int process_reference (const char **string
);
168 void stabsread_clear_cache (void);
170 static const char vptr_name
[] = "_vptr$";
171 static const char vb_name
[] = "_vb$";
174 invalid_cpp_abbrev_complaint (const char *arg1
)
176 complaint (_("invalid C++ abbreviation `%s'"), arg1
);
180 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
182 complaint (_("bad register number %d (max %d) in symbol %s"),
183 regnum
, num_regs
- 1, sym
);
187 stabs_general_complaint (const char *arg1
)
189 complaint ("%s", arg1
);
192 /* Make a list of forward references which haven't been defined. */
194 static struct type
**undef_types
;
195 static int undef_types_allocated
;
196 static int undef_types_length
;
197 static struct symbol
*current_symbol
= NULL
;
199 /* Make a list of nameless types that are undefined.
200 This happens when another type is referenced by its number
201 before this type is actually defined. For instance "t(0,1)=k(0,2)"
202 and type (0,2) is defined only later. */
209 static struct nat
*noname_undefs
;
210 static int noname_undefs_allocated
;
211 static int noname_undefs_length
;
213 /* Check for and handle cretinous stabs symbol name continuation! */
214 #define STABS_CONTINUE(pp,objfile) \
216 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
217 *(pp) = next_symbol_text (objfile); \
220 /* Vector of types defined so far, indexed by their type numbers.
221 (In newer sun systems, dbx uses a pair of numbers in parens,
222 as in "(SUBFILENUM,NUMWITHINSUBFILE)".
223 Then these numbers must be translated through the type_translations
224 hash table to get the index into the type vector.) */
226 static struct type
**type_vector
;
228 /* Number of elements allocated for type_vector currently. */
230 static int type_vector_length
;
232 /* Initial size of type vector. Is realloc'd larger if needed, and
233 realloc'd down to the size actually used, when completed. */
235 #define INITIAL_TYPE_VECTOR_LENGTH 160
238 /* Look up a dbx type-number pair. Return the address of the slot
239 where the type for that number-pair is stored.
240 The number-pair is in TYPENUMS.
242 This can be used for finding the type associated with that pair
243 or for associating a new type with the pair. */
245 static struct type
**
246 dbx_lookup_type (int typenums
[2], struct objfile
*objfile
)
248 int filenum
= typenums
[0];
249 int index
= typenums
[1];
252 struct header_file
*f
;
255 if (filenum
== -1) /* -1,-1 is for temporary types. */
258 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
260 complaint (_("Invalid symbol data: type number "
261 "(%d,%d) out of range at symtab pos %d."),
262 filenum
, index
, symnum
);
270 /* Caller wants address of address of type. We think
271 that negative (rs6k builtin) types will never appear as
272 "lvalues", (nor should they), so we stuff the real type
273 pointer into a temp, and return its address. If referenced,
274 this will do the right thing. */
275 static struct type
*temp_type
;
277 temp_type
= rs6000_builtin_type (index
, objfile
);
281 /* Type is defined outside of header files.
282 Find it in this object file's type vector. */
283 if (index
>= type_vector_length
)
285 old_len
= type_vector_length
;
288 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
289 type_vector
= XNEWVEC (struct type
*, type_vector_length
);
291 while (index
>= type_vector_length
)
293 type_vector_length
*= 2;
295 type_vector
= (struct type
**)
296 xrealloc ((char *) type_vector
,
297 (type_vector_length
* sizeof (struct type
*)));
298 memset (&type_vector
[old_len
], 0,
299 (type_vector_length
- old_len
) * sizeof (struct type
*));
301 return (&type_vector
[index
]);
305 real_filenum
= this_object_header_files
[filenum
];
307 if (real_filenum
>= N_HEADER_FILES (objfile
))
309 static struct type
*temp_type
;
311 warning (_("GDB internal error: bad real_filenum"));
314 temp_type
= objfile_type (objfile
)->builtin_error
;
318 f
= HEADER_FILES (objfile
) + real_filenum
;
320 f_orig_length
= f
->length
;
321 if (index
>= f_orig_length
)
323 while (index
>= f
->length
)
327 f
->vector
= (struct type
**)
328 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
329 memset (&f
->vector
[f_orig_length
], 0,
330 (f
->length
- f_orig_length
) * sizeof (struct type
*));
332 return (&f
->vector
[index
]);
336 /* Make sure there is a type allocated for type numbers TYPENUMS
337 and return the type object.
338 This can create an empty (zeroed) type object.
339 TYPENUMS may be (-1, -1) to return a new type object that is not
340 put into the type vector, and so may not be referred to by number. */
343 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
345 struct type
**type_addr
;
347 if (typenums
[0] == -1)
349 return (alloc_type (objfile
));
352 type_addr
= dbx_lookup_type (typenums
, objfile
);
354 /* If we are referring to a type not known at all yet,
355 allocate an empty type for it.
356 We will fill it in later if we find out how. */
359 *type_addr
= alloc_type (objfile
);
365 /* Allocate a floating-point type of size BITS. */
368 dbx_init_float_type (struct objfile
*objfile
, int bits
)
370 struct gdbarch
*gdbarch
= objfile
->arch ();
371 const struct floatformat
**format
;
374 format
= gdbarch_floatformat_for_type (gdbarch
, NULL
, bits
);
376 type
= init_float_type (objfile
, bits
, NULL
, format
);
378 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, NULL
);
383 /* for all the stabs in a given stab vector, build appropriate types
384 and fix their symbols in given symbol vector. */
387 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
388 struct objfile
*objfile
)
397 /* for all the stab entries, find their corresponding symbols and
398 patch their types! */
400 for (ii
= 0; ii
< stabs
->count
; ++ii
)
402 name
= stabs
->stab
[ii
];
403 pp
= (char *) strchr (name
, ':');
404 gdb_assert (pp
); /* Must find a ':' or game's over. */
408 pp
= (char *) strchr (pp
, ':');
410 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
413 /* FIXME-maybe: it would be nice if we noticed whether
414 the variable was defined *anywhere*, not just whether
415 it is defined in this compilation unit. But neither
416 xlc or GCC seem to need such a definition, and until
417 we do psymtabs (so that the minimal symbols from all
418 compilation units are available now), I'm not sure
419 how to get the information. */
421 /* On xcoff, if a global is defined and never referenced,
422 ld will remove it from the executable. There is then
423 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
424 sym
= new (&objfile
->objfile_obstack
) symbol
;
425 sym
->set_domain (VAR_DOMAIN
);
426 sym
->set_aclass_index (LOC_OPTIMIZED_OUT
);
427 sym
->set_linkage_name
428 (obstack_strndup (&objfile
->objfile_obstack
, name
, pp
- name
));
430 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
432 /* I don't think the linker does this with functions,
433 so as far as I know this is never executed.
434 But it doesn't hurt to check. */
436 (lookup_function_type (read_type (&pp
, objfile
)));
440 sym
->set_type (read_type (&pp
, objfile
));
442 add_symbol_to_list (sym
, get_global_symbols ());
447 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
450 (lookup_function_type (read_type (&pp
, objfile
)));
454 sym
->set_type (read_type (&pp
, objfile
));
462 /* Read a number by which a type is referred to in dbx data,
463 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
464 Just a single number N is equivalent to (0,N).
465 Return the two numbers by storing them in the vector TYPENUMS.
466 TYPENUMS will then be used as an argument to dbx_lookup_type.
468 Returns 0 for success, -1 for error. */
471 read_type_number (const char **pp
, int *typenums
)
478 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
481 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
488 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
496 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
497 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
498 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
499 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
501 /* Structure for storing pointers to reference definitions for fast lookup
502 during "process_later". */
511 #define MAX_CHUNK_REFS 100
512 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
513 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
515 static struct ref_map
*ref_map
;
517 /* Ptr to free cell in chunk's linked list. */
518 static int ref_count
= 0;
520 /* Number of chunks malloced. */
521 static int ref_chunk
= 0;
523 /* This file maintains a cache of stabs aliases found in the symbol
524 table. If the symbol table changes, this cache must be cleared
525 or we are left holding onto data in invalid obstacks. */
527 stabsread_clear_cache (void)
533 /* Create array of pointers mapping refids to symbols and stab strings.
534 Add pointers to reference definition symbols and/or their values as we
535 find them, using their reference numbers as our index.
536 These will be used later when we resolve references. */
538 ref_add (int refnum
, struct symbol
*sym
, const char *stabs
, CORE_ADDR value
)
542 if (refnum
>= ref_count
)
543 ref_count
= refnum
+ 1;
544 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
546 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
547 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
549 ref_map
= (struct ref_map
*)
550 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
551 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0,
552 new_chunks
* REF_CHUNK_SIZE
);
553 ref_chunk
+= new_chunks
;
555 ref_map
[refnum
].stabs
= stabs
;
556 ref_map
[refnum
].sym
= sym
;
557 ref_map
[refnum
].value
= value
;
560 /* Return defined sym for the reference REFNUM. */
562 ref_search (int refnum
)
564 if (refnum
< 0 || refnum
> ref_count
)
566 return ref_map
[refnum
].sym
;
569 /* Parse a reference id in STRING and return the resulting
570 reference number. Move STRING beyond the reference id. */
573 process_reference (const char **string
)
581 /* Advance beyond the initial '#'. */
584 /* Read number as reference id. */
585 while (*p
&& isdigit (*p
))
587 refnum
= refnum
* 10 + *p
- '0';
594 /* If STRING defines a reference, store away a pointer to the reference
595 definition for later use. Return the reference number. */
598 symbol_reference_defined (const char **string
)
600 const char *p
= *string
;
603 refnum
= process_reference (&p
);
605 /* Defining symbols end in '='. */
608 /* Symbol is being defined here. */
614 /* Must be a reference. Either the symbol has already been defined,
615 or this is a forward reference to it. */
622 stab_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
624 int regno
= gdbarch_stab_reg_to_regnum (gdbarch
, sym
->value_longest ());
626 if (regno
< 0 || regno
>= gdbarch_num_cooked_regs (gdbarch
))
628 reg_value_complaint (regno
, gdbarch_num_cooked_regs (gdbarch
),
631 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless. */
637 static const struct symbol_register_ops stab_register_funcs
= {
641 /* The "aclass" indices for computed symbols. */
643 static int stab_register_index
;
644 static int stab_regparm_index
;
647 define_symbol (CORE_ADDR valu
, const char *string
, int desc
, int type
,
648 struct objfile
*objfile
)
650 struct gdbarch
*gdbarch
= objfile
->arch ();
652 const char *p
= find_name_end (string
);
657 /* We would like to eliminate nameless symbols, but keep their types.
658 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
659 to type 2, but, should not create a symbol to address that type. Since
660 the symbol will be nameless, there is no way any user can refer to it. */
664 /* Ignore syms with empty names. */
668 /* Ignore old-style symbols from cc -go. */
679 _("Bad stabs string '%s'"), string
);
684 /* If a nameless stab entry, all we need is the type, not the symbol.
685 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
686 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
688 current_symbol
= sym
= new (&objfile
->objfile_obstack
) symbol
;
690 if (processing_gcc_compilation
)
692 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
693 number of bytes occupied by a type or object, which we ignore. */
694 sym
->set_line (desc
);
698 sym
->set_line (0); /* unknown */
701 sym
->set_language (get_current_subfile ()->language
,
702 &objfile
->objfile_obstack
);
704 if (is_cplus_marker (string
[0]))
706 /* Special GNU C++ names. */
710 sym
->set_linkage_name ("this");
713 case 'v': /* $vtbl_ptr_type */
717 sym
->set_linkage_name ("eh_throw");
721 /* This was an anonymous type that was never fixed up. */
725 complaint (_("Unknown C++ symbol name `%s'"),
727 goto normal
; /* Do *something* with it. */
733 gdb::unique_xmalloc_ptr
<char> new_name
;
735 if (sym
->language () == language_cplus
)
737 std::string
name (string
, p
- string
);
738 new_name
= cp_canonicalize_string (name
.c_str ());
740 else if (sym
->language () == language_c
)
742 std::string
name (string
, p
- string
);
743 new_name
= c_canonicalize_name (name
.c_str ());
745 if (new_name
!= nullptr)
746 sym
->compute_and_set_names (new_name
.get (), true, objfile
->per_bfd
);
748 sym
->compute_and_set_names (gdb::string_view (string
, p
- string
), true,
751 if (sym
->language () == language_cplus
)
752 cp_scan_for_anonymous_namespaces (get_buildsym_compunit (), sym
,
758 /* Determine the type of name being defined. */
760 /* Getting GDB to correctly skip the symbol on an undefined symbol
761 descriptor and not ever dump core is a very dodgy proposition if
762 we do things this way. I say the acorn RISC machine can just
763 fix their compiler. */
764 /* The Acorn RISC machine's compiler can put out locals that don't
765 start with "234=" or "(3,4)=", so assume anything other than the
766 deftypes we know how to handle is a local. */
767 if (!strchr ("cfFGpPrStTvVXCR", *p
))
769 if (isdigit (*p
) || *p
== '(' || *p
== '-')
778 /* c is a special case, not followed by a type-number.
779 SYMBOL:c=iVALUE for an integer constant symbol.
780 SYMBOL:c=rVALUE for a floating constant symbol.
781 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
782 e.g. "b:c=e6,0" for "const b = blob1"
783 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
786 sym
->set_aclass_index (LOC_CONST
);
787 sym
->set_type (error_type (&p
, objfile
));
788 sym
->set_domain (VAR_DOMAIN
);
789 add_symbol_to_list (sym
, get_file_symbols ());
798 struct type
*dbl_type
;
800 dbl_type
= objfile_type (objfile
)->builtin_double
;
802 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
803 dbl_type
->length ());
805 target_float_from_string (dbl_valu
, dbl_type
, std::string (p
));
807 sym
->set_type (dbl_type
);
808 sym
->set_value_bytes (dbl_valu
);
809 sym
->set_aclass_index (LOC_CONST_BYTES
);
814 /* Defining integer constants this way is kind of silly,
815 since 'e' constants allows the compiler to give not
816 only the value, but the type as well. C has at least
817 int, long, unsigned int, and long long as constant
818 types; other languages probably should have at least
819 unsigned as well as signed constants. */
821 sym
->set_type (objfile_type (objfile
)->builtin_long
);
822 sym
->set_value_longest (atoi (p
));
823 sym
->set_aclass_index (LOC_CONST
);
829 sym
->set_type (objfile_type (objfile
)->builtin_char
);
830 sym
->set_value_longest (atoi (p
));
831 sym
->set_aclass_index (LOC_CONST
);
837 struct type
*range_type
;
840 gdb_byte
*string_local
= (gdb_byte
*) alloca (strlen (p
));
841 gdb_byte
*string_value
;
843 if (quote
!= '\'' && quote
!= '"')
845 sym
->set_aclass_index (LOC_CONST
);
846 sym
->set_type (error_type (&p
, objfile
));
847 sym
->set_domain (VAR_DOMAIN
);
848 add_symbol_to_list (sym
, get_file_symbols ());
852 /* Find matching quote, rejecting escaped quotes. */
853 while (*p
&& *p
!= quote
)
855 if (*p
== '\\' && p
[1] == quote
)
857 string_local
[ind
] = (gdb_byte
) quote
;
863 string_local
[ind
] = (gdb_byte
) (*p
);
870 sym
->set_aclass_index (LOC_CONST
);
871 sym
->set_type (error_type (&p
, objfile
));
872 sym
->set_domain (VAR_DOMAIN
);
873 add_symbol_to_list (sym
, get_file_symbols ());
877 /* NULL terminate the string. */
878 string_local
[ind
] = 0;
880 = create_static_range_type (NULL
,
881 objfile_type (objfile
)->builtin_int
,
884 (create_array_type (NULL
, objfile_type (objfile
)->builtin_char
,
887 = (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, ind
+ 1);
888 memcpy (string_value
, string_local
, ind
+ 1);
891 sym
->set_value_bytes (string_value
);
892 sym
->set_aclass_index (LOC_CONST_BYTES
);
897 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
898 can be represented as integral.
899 e.g. "b:c=e6,0" for "const b = blob1"
900 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
902 sym
->set_aclass_index (LOC_CONST
);
903 sym
->set_type (read_type (&p
, objfile
));
907 sym
->set_type (error_type (&p
, objfile
));
912 /* If the value is too big to fit in an int (perhaps because
913 it is unsigned), or something like that, we silently get
914 a bogus value. The type and everything else about it is
915 correct. Ideally, we should be using whatever we have
916 available for parsing unsigned and long long values,
918 sym
->set_value_longest (atoi (p
));
923 sym
->set_aclass_index (LOC_CONST
);
924 sym
->set_type (error_type (&p
, objfile
));
927 sym
->set_domain (VAR_DOMAIN
);
928 add_symbol_to_list (sym
, get_file_symbols ());
932 /* The name of a caught exception. */
933 sym
->set_type (read_type (&p
, objfile
));
934 sym
->set_aclass_index (LOC_LABEL
);
935 sym
->set_domain (VAR_DOMAIN
);
936 sym
->set_value_address (valu
);
937 add_symbol_to_list (sym
, get_local_symbols ());
941 /* A static function definition. */
942 sym
->set_type (read_type (&p
, objfile
));
943 sym
->set_aclass_index (LOC_BLOCK
);
944 sym
->set_domain (VAR_DOMAIN
);
945 add_symbol_to_list (sym
, get_file_symbols ());
946 /* fall into process_function_types. */
948 process_function_types
:
949 /* Function result types are described as the result type in stabs.
950 We need to convert this to the function-returning-type-X type
951 in GDB. E.g. "int" is converted to "function returning int". */
952 if (sym
->type ()->code () != TYPE_CODE_FUNC
)
953 sym
->set_type (lookup_function_type (sym
->type ()));
955 /* All functions in C++ have prototypes. Stabs does not offer an
956 explicit way to identify prototyped or unprototyped functions,
957 but both GCC and Sun CC emit stabs for the "call-as" type rather
958 than the "declared-as" type for unprototyped functions, so
959 we treat all functions as if they were prototyped. This is used
960 primarily for promotion when calling the function from GDB. */
961 sym
->type ()->set_is_prototyped (true);
963 /* fall into process_prototype_types. */
965 process_prototype_types
:
966 /* Sun acc puts declared types of arguments here. */
969 struct type
*ftype
= sym
->type ();
974 /* Obtain a worst case guess for the number of arguments
975 by counting the semicolons. */
982 /* Allocate parameter information fields and fill them in. */
985 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
)));
990 /* A type number of zero indicates the start of varargs.
991 FIXME: GDB currently ignores vararg functions. */
992 if (p
[0] == '0' && p
[1] == '\0')
994 ptype
= read_type (&p
, objfile
);
996 /* The Sun compilers mark integer arguments, which should
997 be promoted to the width of the calling conventions, with
998 a type which references itself. This type is turned into
999 a TYPE_CODE_VOID type by read_type, and we have to turn
1000 it back into builtin_int here.
1001 FIXME: Do we need a new builtin_promoted_int_arg ? */
1002 if (ptype
->code () == TYPE_CODE_VOID
)
1003 ptype
= objfile_type (objfile
)->builtin_int
;
1004 ftype
->field (nparams
).set_type (ptype
);
1005 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
1007 ftype
->set_num_fields (nparams
);
1008 ftype
->set_is_prototyped (true);
1013 /* A global function definition. */
1014 sym
->set_type (read_type (&p
, objfile
));
1015 sym
->set_aclass_index (LOC_BLOCK
);
1016 sym
->set_domain (VAR_DOMAIN
);
1017 add_symbol_to_list (sym
, get_global_symbols ());
1018 goto process_function_types
;
1021 /* For a class G (global) symbol, it appears that the
1022 value is not correct. It is necessary to search for the
1023 corresponding linker definition to find the value.
1024 These definitions appear at the end of the namelist. */
1025 sym
->set_type (read_type (&p
, objfile
));
1026 sym
->set_aclass_index (LOC_STATIC
);
1027 sym
->set_domain (VAR_DOMAIN
);
1028 /* Don't add symbol references to global_sym_chain.
1029 Symbol references don't have valid names and wont't match up with
1030 minimal symbols when the global_sym_chain is relocated.
1031 We'll fixup symbol references when we fixup the defining symbol. */
1032 if (sym
->linkage_name () && sym
->linkage_name ()[0] != '#')
1034 i
= hashname (sym
->linkage_name ());
1035 sym
->set_value_chain (global_sym_chain
[i
]);
1036 global_sym_chain
[i
] = sym
;
1038 add_symbol_to_list (sym
, get_global_symbols ());
1041 /* This case is faked by a conditional above,
1042 when there is no code letter in the dbx data.
1043 Dbx data never actually contains 'l'. */
1046 sym
->set_type (read_type (&p
, objfile
));
1047 sym
->set_aclass_index (LOC_LOCAL
);
1048 sym
->set_value_longest (valu
);
1049 sym
->set_domain (VAR_DOMAIN
);
1050 add_symbol_to_list (sym
, get_local_symbols ());
1055 /* pF is a two-letter code that means a function parameter in Fortran.
1056 The type-number specifies the type of the return value.
1057 Translate it into a pointer-to-function type. */
1061 (lookup_pointer_type
1062 (lookup_function_type (read_type (&p
, objfile
))));
1065 sym
->set_type (read_type (&p
, objfile
));
1067 sym
->set_aclass_index (LOC_ARG
);
1068 sym
->set_value_longest (valu
);
1069 sym
->set_domain (VAR_DOMAIN
);
1070 sym
->set_is_argument (1);
1071 add_symbol_to_list (sym
, get_local_symbols ());
1073 if (gdbarch_byte_order (gdbarch
) != BFD_ENDIAN_BIG
)
1075 /* On little-endian machines, this crud is never necessary,
1076 and, if the extra bytes contain garbage, is harmful. */
1080 /* If it's gcc-compiled, if it says `short', believe it. */
1081 if (processing_gcc_compilation
1082 || gdbarch_believe_pcc_promotion (gdbarch
))
1085 if (!gdbarch_believe_pcc_promotion (gdbarch
))
1087 /* If PCC says a parameter is a short or a char, it is
1089 if (sym
->type ()->length ()
1090 < gdbarch_int_bit (gdbarch
) / TARGET_CHAR_BIT
1091 && sym
->type ()->code () == TYPE_CODE_INT
)
1094 (sym
->type ()->is_unsigned ()
1095 ? objfile_type (objfile
)->builtin_unsigned_int
1096 : objfile_type (objfile
)->builtin_int
);
1103 /* acc seems to use P to declare the prototypes of functions that
1104 are referenced by this file. gdb is not prepared to deal
1105 with this extra information. FIXME, it ought to. */
1108 sym
->set_type (read_type (&p
, objfile
));
1109 goto process_prototype_types
;
1114 /* Parameter which is in a register. */
1115 sym
->set_type (read_type (&p
, objfile
));
1116 sym
->set_aclass_index (stab_register_index
);
1117 sym
->set_is_argument (1);
1118 sym
->set_value_longest (valu
);
1119 sym
->set_domain (VAR_DOMAIN
);
1120 add_symbol_to_list (sym
, get_local_symbols ());
1124 /* Register variable (either global or local). */
1125 sym
->set_type (read_type (&p
, objfile
));
1126 sym
->set_aclass_index (stab_register_index
);
1127 sym
->set_value_longest (valu
);
1128 sym
->set_domain (VAR_DOMAIN
);
1129 if (within_function
)
1131 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1132 the same name to represent an argument passed in a
1133 register. GCC uses 'P' for the same case. So if we find
1134 such a symbol pair we combine it into one 'P' symbol.
1135 For Sun cc we need to do this regardless of stabs_argument_has_addr, because the compiler puts out
1136 the 'p' symbol even if it never saves the argument onto
1139 On most machines, we want to preserve both symbols, so
1140 that we can still get information about what is going on
1141 with the stack (VAX for computing args_printed, using
1142 stack slots instead of saved registers in backtraces,
1145 Note that this code illegally combines
1146 main(argc) struct foo argc; { register struct foo argc; }
1147 but this case is considered pathological and causes a warning
1148 from a decent compiler. */
1150 struct pending
*local_symbols
= *get_local_symbols ();
1152 && local_symbols
->nsyms
> 0
1153 && gdbarch_stabs_argument_has_addr (gdbarch
, sym
->type ()))
1155 struct symbol
*prev_sym
;
1157 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1158 if ((prev_sym
->aclass () == LOC_REF_ARG
1159 || prev_sym
->aclass () == LOC_ARG
)
1160 && strcmp (prev_sym
->linkage_name (),
1161 sym
->linkage_name ()) == 0)
1163 prev_sym
->set_aclass_index (stab_register_index
);
1164 /* Use the type from the LOC_REGISTER; that is the type
1165 that is actually in that register. */
1166 prev_sym
->set_type (sym
->type ());
1167 prev_sym
->set_value_longest (sym
->value_longest ());
1172 add_symbol_to_list (sym
, get_local_symbols ());
1175 add_symbol_to_list (sym
, get_file_symbols ());
1179 /* Static symbol at top level of file. */
1180 sym
->set_type (read_type (&p
, objfile
));
1181 sym
->set_aclass_index (LOC_STATIC
);
1182 sym
->set_value_address (valu
);
1183 sym
->set_domain (VAR_DOMAIN
);
1184 add_symbol_to_list (sym
, get_file_symbols ());
1188 /* In Ada, there is no distinction between typedef and non-typedef;
1189 any type declaration implicitly has the equivalent of a typedef,
1190 and thus 't' is in fact equivalent to 'Tt'.
1192 Therefore, for Ada units, we check the character immediately
1193 before the 't', and if we do not find a 'T', then make sure to
1194 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1195 will be stored in the VAR_DOMAIN). If the symbol was indeed
1196 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1197 elsewhere, so we don't need to take care of that.
1199 This is important to do, because of forward references:
1200 The cleanup of undefined types stored in undef_types only uses
1201 STRUCT_DOMAIN symbols to perform the replacement. */
1202 synonym
= (sym
->language () == language_ada
&& p
[-2] != 'T');
1205 sym
->set_type (read_type (&p
, objfile
));
1207 /* For a nameless type, we don't want a create a symbol, thus we
1208 did not use `sym'. Return without further processing. */
1212 sym
->set_aclass_index (LOC_TYPEDEF
);
1213 sym
->set_value_longest (valu
);
1214 sym
->set_domain (VAR_DOMAIN
);
1215 /* C++ vagaries: we may have a type which is derived from
1216 a base type which did not have its name defined when the
1217 derived class was output. We fill in the derived class's
1218 base part member's name here in that case. */
1219 if (sym
->type ()->name () != NULL
)
1220 if ((sym
->type ()->code () == TYPE_CODE_STRUCT
1221 || sym
->type ()->code () == TYPE_CODE_UNION
)
1222 && TYPE_N_BASECLASSES (sym
->type ()))
1226 for (j
= TYPE_N_BASECLASSES (sym
->type ()) - 1; j
>= 0; j
--)
1227 if (TYPE_BASECLASS_NAME (sym
->type (), j
) == 0)
1228 sym
->type ()->field (j
).set_name
1229 (TYPE_BASECLASS (sym
->type (), j
)->name ());
1232 if (sym
->type ()->name () == NULL
)
1234 if ((sym
->type ()->code () == TYPE_CODE_PTR
1235 && strcmp (sym
->linkage_name (), vtbl_ptr_name
))
1236 || sym
->type ()->code () == TYPE_CODE_FUNC
)
1238 /* If we are giving a name to a type such as "pointer to
1239 foo" or "function returning foo", we better not set
1240 the TYPE_NAME. If the program contains "typedef char
1241 *caddr_t;", we don't want all variables of type char
1242 * to print as caddr_t. This is not just a
1243 consequence of GDB's type management; PCC and GCC (at
1244 least through version 2.4) both output variables of
1245 either type char * or caddr_t with the type number
1246 defined in the 't' symbol for caddr_t. If a future
1247 compiler cleans this up it GDB is not ready for it
1248 yet, but if it becomes ready we somehow need to
1249 disable this check (without breaking the PCC/GCC2.4
1254 Fortunately, this check seems not to be necessary
1255 for anything except pointers or functions. */
1256 /* ezannoni: 2000-10-26. This seems to apply for
1257 versions of gcc older than 2.8. This was the original
1258 problem: with the following code gdb would tell that
1259 the type for name1 is caddr_t, and func is char().
1261 typedef char *caddr_t;
1273 /* Pascal accepts names for pointer types. */
1274 if (get_current_subfile ()->language
== language_pascal
)
1275 sym
->type ()->set_name (sym
->linkage_name ());
1278 sym
->type ()->set_name (sym
->linkage_name ());
1281 add_symbol_to_list (sym
, get_file_symbols ());
1285 /* Create the STRUCT_DOMAIN clone. */
1286 struct symbol
*struct_sym
= new (&objfile
->objfile_obstack
) symbol
;
1289 struct_sym
->set_aclass_index (LOC_TYPEDEF
);
1290 struct_sym
->set_value_longest (valu
);
1291 struct_sym
->set_domain (STRUCT_DOMAIN
);
1292 if (sym
->type ()->name () == 0)
1293 sym
->type ()->set_name
1294 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1296 add_symbol_to_list (struct_sym
, get_file_symbols ());
1302 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1303 by 't' which means we are typedef'ing it as well. */
1304 synonym
= *p
== 't';
1309 sym
->set_type (read_type (&p
, objfile
));
1311 /* For a nameless type, we don't want a create a symbol, thus we
1312 did not use `sym'. Return without further processing. */
1316 sym
->set_aclass_index (LOC_TYPEDEF
);
1317 sym
->set_value_longest (valu
);
1318 sym
->set_domain (STRUCT_DOMAIN
);
1319 if (sym
->type ()->name () == 0)
1320 sym
->type ()->set_name
1321 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1323 add_symbol_to_list (sym
, get_file_symbols ());
1327 /* Clone the sym and then modify it. */
1328 struct symbol
*typedef_sym
= new (&objfile
->objfile_obstack
) symbol
;
1330 *typedef_sym
= *sym
;
1331 typedef_sym
->set_aclass_index (LOC_TYPEDEF
);
1332 typedef_sym
->set_value_longest (valu
);
1333 typedef_sym
->set_domain (VAR_DOMAIN
);
1334 if (sym
->type ()->name () == 0)
1335 sym
->type ()->set_name
1336 (obconcat (&objfile
->objfile_obstack
, sym
->linkage_name (),
1338 add_symbol_to_list (typedef_sym
, get_file_symbols ());
1343 /* Static symbol of local scope. */
1344 sym
->set_type (read_type (&p
, objfile
));
1345 sym
->set_aclass_index (LOC_STATIC
);
1346 sym
->set_value_address (valu
);
1347 sym
->set_domain (VAR_DOMAIN
);
1348 add_symbol_to_list (sym
, get_local_symbols ());
1352 /* Reference parameter */
1353 sym
->set_type (read_type (&p
, objfile
));
1354 sym
->set_aclass_index (LOC_REF_ARG
);
1355 sym
->set_is_argument (1);
1356 sym
->set_value_longest (valu
);
1357 sym
->set_domain (VAR_DOMAIN
);
1358 add_symbol_to_list (sym
, get_local_symbols ());
1362 /* Reference parameter which is in a register. */
1363 sym
->set_type (read_type (&p
, objfile
));
1364 sym
->set_aclass_index (stab_regparm_index
);
1365 sym
->set_is_argument (1);
1366 sym
->set_value_longest (valu
);
1367 sym
->set_domain (VAR_DOMAIN
);
1368 add_symbol_to_list (sym
, get_local_symbols ());
1372 /* This is used by Sun FORTRAN for "function result value".
1373 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1374 that Pascal uses it too, but when I tried it Pascal used
1375 "x:3" (local symbol) instead. */
1376 sym
->set_type (read_type (&p
, objfile
));
1377 sym
->set_aclass_index (LOC_LOCAL
);
1378 sym
->set_value_longest (valu
);
1379 sym
->set_domain (VAR_DOMAIN
);
1380 add_symbol_to_list (sym
, get_local_symbols ());
1384 sym
->set_type (error_type (&p
, objfile
));
1385 sym
->set_aclass_index (LOC_CONST
);
1386 sym
->set_value_longest (0);
1387 sym
->set_domain (VAR_DOMAIN
);
1388 add_symbol_to_list (sym
, get_file_symbols ());
1392 /* Some systems pass variables of certain types by reference instead
1393 of by value, i.e. they will pass the address of a structure (in a
1394 register or on the stack) instead of the structure itself. */
1396 if (gdbarch_stabs_argument_has_addr (gdbarch
, sym
->type ())
1397 && sym
->is_argument ())
1399 /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
1400 variables passed in a register). */
1401 if (sym
->aclass () == LOC_REGISTER
)
1402 sym
->set_aclass_index (LOC_REGPARM_ADDR
);
1403 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1404 and subsequent arguments on SPARC, for example). */
1405 else if (sym
->aclass () == LOC_ARG
)
1406 sym
->set_aclass_index (LOC_REF_ARG
);
1412 /* Skip rest of this symbol and return an error type.
1414 General notes on error recovery: error_type always skips to the
1415 end of the symbol (modulo cretinous dbx symbol name continuation).
1416 Thus code like this:
1418 if (*(*pp)++ != ';')
1419 return error_type (pp, objfile);
1421 is wrong because if *pp starts out pointing at '\0' (typically as the
1422 result of an earlier error), it will be incremented to point to the
1423 start of the next symbol, which might produce strange results, at least
1424 if you run off the end of the string table. Instead use
1427 return error_type (pp, objfile);
1433 foo = error_type (pp, objfile);
1437 And in case it isn't obvious, the point of all this hair is so the compiler
1438 can define new types and new syntaxes, and old versions of the
1439 debugger will be able to read the new symbol tables. */
1441 static struct type
*
1442 error_type (const char **pp
, struct objfile
*objfile
)
1444 complaint (_("couldn't parse type; debugger out of date?"));
1447 /* Skip to end of symbol. */
1448 while (**pp
!= '\0')
1453 /* Check for and handle cretinous dbx symbol name continuation! */
1454 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1456 *pp
= next_symbol_text (objfile
);
1463 return objfile_type (objfile
)->builtin_error
;
1467 /* Allocate a stub method whose return type is TYPE. This apparently
1468 happens for speed of symbol reading, since parsing out the
1469 arguments to the method is cpu-intensive, the way we are doing it.
1470 So, we will fill in arguments later. This always returns a fresh
1473 static struct type
*
1474 allocate_stub_method (struct type
*type
)
1478 mtype
= alloc_type_copy (type
);
1479 mtype
->set_code (TYPE_CODE_METHOD
);
1480 mtype
->set_length (1);
1481 mtype
->set_is_stub (true);
1482 mtype
->set_target_type (type
);
1483 /* TYPE_SELF_TYPE (mtype) = unknown yet */
1487 /* Read type information or a type definition; return the type. Even
1488 though this routine accepts either type information or a type
1489 definition, the distinction is relevant--some parts of stabsread.c
1490 assume that type information starts with a digit, '-', or '(' in
1491 deciding whether to call read_type. */
1493 static struct type
*
1494 read_type (const char **pp
, struct objfile
*objfile
)
1496 struct type
*type
= 0;
1499 char type_descriptor
;
1501 /* Size in bits of type if specified by a type attribute, or -1 if
1502 there is no size attribute. */
1505 /* Used to distinguish string and bitstring from char-array and set. */
1508 /* Used to distinguish vector from array. */
1511 /* Read type number if present. The type number may be omitted.
1512 for instance in a two-dimensional array declared with type
1513 "ar1;1;10;ar1;1;10;4". */
1514 if ((**pp
>= '0' && **pp
<= '9')
1518 if (read_type_number (pp
, typenums
) != 0)
1519 return error_type (pp
, objfile
);
1523 /* Type is not being defined here. Either it already
1524 exists, or this is a forward reference to it.
1525 dbx_alloc_type handles both cases. */
1526 type
= dbx_alloc_type (typenums
, objfile
);
1528 /* If this is a forward reference, arrange to complain if it
1529 doesn't get patched up by the time we're done
1531 if (type
->code () == TYPE_CODE_UNDEF
)
1532 add_undefined_type (type
, typenums
);
1537 /* Type is being defined here. */
1539 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1544 /* 'typenums=' not present, type is anonymous. Read and return
1545 the definition, but don't put it in the type vector. */
1546 typenums
[0] = typenums
[1] = -1;
1551 type_descriptor
= (*pp
)[-1];
1552 switch (type_descriptor
)
1556 enum type_code code
;
1558 /* Used to index through file_symbols. */
1559 struct pending
*ppt
;
1562 /* Name including "struct", etc. */
1566 const char *from
, *p
, *q1
, *q2
;
1568 /* Set the type code according to the following letter. */
1572 code
= TYPE_CODE_STRUCT
;
1575 code
= TYPE_CODE_UNION
;
1578 code
= TYPE_CODE_ENUM
;
1582 /* Complain and keep going, so compilers can invent new
1583 cross-reference types. */
1584 complaint (_("Unrecognized cross-reference type `%c'"),
1586 code
= TYPE_CODE_STRUCT
;
1591 q1
= strchr (*pp
, '<');
1592 p
= strchr (*pp
, ':');
1594 return error_type (pp
, objfile
);
1595 if (q1
&& p
> q1
&& p
[1] == ':')
1597 int nesting_level
= 0;
1599 for (q2
= q1
; *q2
; q2
++)
1603 else if (*q2
== '>')
1605 else if (*q2
== ':' && nesting_level
== 0)
1610 return error_type (pp
, objfile
);
1613 if (get_current_subfile ()->language
== language_cplus
)
1615 std::string
name (*pp
, p
- *pp
);
1616 gdb::unique_xmalloc_ptr
<char> new_name
1617 = cp_canonicalize_string (name
.c_str ());
1618 if (new_name
!= nullptr)
1619 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1622 else if (get_current_subfile ()->language
== language_c
)
1624 std::string
name (*pp
, p
- *pp
);
1625 gdb::unique_xmalloc_ptr
<char> new_name
1626 = c_canonicalize_name (name
.c_str ());
1627 if (new_name
!= nullptr)
1628 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1631 if (type_name
== NULL
)
1633 char *to
= type_name
= (char *)
1634 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1636 /* Copy the name. */
1643 /* Set the pointer ahead of the name which we just read, and
1648 /* If this type has already been declared, then reuse the same
1649 type, rather than allocating a new one. This saves some
1652 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1653 for (i
= 0; i
< ppt
->nsyms
; i
++)
1655 struct symbol
*sym
= ppt
->symbol
[i
];
1657 if (sym
->aclass () == LOC_TYPEDEF
1658 && sym
->domain () == STRUCT_DOMAIN
1659 && (sym
->type ()->code () == code
)
1660 && strcmp (sym
->linkage_name (), type_name
) == 0)
1662 obstack_free (&objfile
->objfile_obstack
, type_name
);
1663 type
= sym
->type ();
1664 if (typenums
[0] != -1)
1665 *dbx_lookup_type (typenums
, objfile
) = type
;
1670 /* Didn't find the type to which this refers, so we must
1671 be dealing with a forward reference. Allocate a type
1672 structure for it, and keep track of it so we can
1673 fill in the rest of the fields when we get the full
1675 type
= dbx_alloc_type (typenums
, objfile
);
1676 type
->set_code (code
);
1677 type
->set_name (type_name
);
1678 INIT_CPLUS_SPECIFIC (type
);
1679 type
->set_is_stub (true);
1681 add_undefined_type (type
, typenums
);
1685 case '-': /* RS/6000 built-in type */
1699 /* We deal with something like t(1,2)=(3,4)=... which
1700 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1702 /* Allocate and enter the typedef type first.
1703 This handles recursive types. */
1704 type
= dbx_alloc_type (typenums
, objfile
);
1705 type
->set_code (TYPE_CODE_TYPEDEF
);
1707 struct type
*xtype
= read_type (pp
, objfile
);
1711 /* It's being defined as itself. That means it is "void". */
1712 type
->set_code (TYPE_CODE_VOID
);
1713 type
->set_length (1);
1715 else if (type_size
>= 0 || is_string
)
1717 /* This is the absolute wrong way to construct types. Every
1718 other debug format has found a way around this problem and
1719 the related problems with unnecessarily stubbed types;
1720 someone motivated should attempt to clean up the issue
1721 here as well. Once a type pointed to has been created it
1722 should not be modified.
1724 Well, it's not *absolutely* wrong. Constructing recursive
1725 types (trees, linked lists) necessarily entails modifying
1726 types after creating them. Constructing any loop structure
1727 entails side effects. The Dwarf 2 reader does handle this
1728 more gracefully (it never constructs more than once
1729 instance of a type object, so it doesn't have to copy type
1730 objects wholesale), but it still mutates type objects after
1731 other folks have references to them.
1733 Keep in mind that this circularity/mutation issue shows up
1734 at the source language level, too: C's "incomplete types",
1735 for example. So the proper cleanup, I think, would be to
1736 limit GDB's type smashing to match exactly those required
1737 by the source language. So GDB could have a
1738 "complete_this_type" function, but never create unnecessary
1739 copies of a type otherwise. */
1740 replace_type (type
, xtype
);
1741 type
->set_name (NULL
);
1745 type
->set_target_is_stub (true);
1746 type
->set_target_type (xtype
);
1751 /* In the following types, we must be sure to overwrite any existing
1752 type that the typenums refer to, rather than allocating a new one
1753 and making the typenums point to the new one. This is because there
1754 may already be pointers to the existing type (if it had been
1755 forward-referenced), and we must change it to a pointer, function,
1756 reference, or whatever, *in-place*. */
1758 case '*': /* Pointer to another type */
1759 type1
= read_type (pp
, objfile
);
1760 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1763 case '&': /* Reference to another type */
1764 type1
= read_type (pp
, objfile
);
1765 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1769 case 'f': /* Function returning another type */
1770 type1
= read_type (pp
, objfile
);
1771 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1774 case 'g': /* Prototyped function. (Sun) */
1776 /* Unresolved questions:
1778 - According to Sun's ``STABS Interface Manual'', for 'f'
1779 and 'F' symbol descriptors, a `0' in the argument type list
1780 indicates a varargs function. But it doesn't say how 'g'
1781 type descriptors represent that info. Someone with access
1782 to Sun's toolchain should try it out.
1784 - According to the comment in define_symbol (search for
1785 `process_prototype_types:'), Sun emits integer arguments as
1786 types which ref themselves --- like `void' types. Do we
1787 have to deal with that here, too? Again, someone with
1788 access to Sun's toolchain should try it out and let us
1791 const char *type_start
= (*pp
) - 1;
1792 struct type
*return_type
= read_type (pp
, objfile
);
1793 struct type
*func_type
1794 = make_function_type (return_type
,
1795 dbx_lookup_type (typenums
, objfile
));
1798 struct type_list
*next
;
1802 while (**pp
&& **pp
!= '#')
1804 struct type
*arg_type
= read_type (pp
, objfile
);
1805 struct type_list
*newobj
= XALLOCA (struct type_list
);
1806 newobj
->type
= arg_type
;
1807 newobj
->next
= arg_types
;
1815 complaint (_("Prototyped function type didn't "
1816 "end arguments with `#':\n%s"),
1820 /* If there is just one argument whose type is `void', then
1821 that's just an empty argument list. */
1823 && ! arg_types
->next
1824 && arg_types
->type
->code () == TYPE_CODE_VOID
)
1827 func_type
->set_fields
1828 ((struct field
*) TYPE_ALLOC (func_type
,
1829 num_args
* sizeof (struct field
)));
1830 memset (func_type
->fields (), 0, num_args
* sizeof (struct field
));
1833 struct type_list
*t
;
1835 /* We stuck each argument type onto the front of the list
1836 when we read it, so the list is reversed. Build the
1837 fields array right-to-left. */
1838 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1839 func_type
->field (i
).set_type (t
->type
);
1841 func_type
->set_num_fields (num_args
);
1842 func_type
->set_is_prototyped (true);
1848 case 'k': /* Const qualifier on some type (Sun) */
1849 type
= read_type (pp
, objfile
);
1850 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1851 dbx_lookup_type (typenums
, objfile
));
1854 case 'B': /* Volatile qual on some type (Sun) */
1855 type
= read_type (pp
, objfile
);
1856 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1857 dbx_lookup_type (typenums
, objfile
));
1861 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1862 { /* Member (class & variable) type */
1863 /* FIXME -- we should be doing smash_to_XXX types here. */
1865 struct type
*domain
= read_type (pp
, objfile
);
1866 struct type
*memtype
;
1869 /* Invalid member type data format. */
1870 return error_type (pp
, objfile
);
1873 memtype
= read_type (pp
, objfile
);
1874 type
= dbx_alloc_type (typenums
, objfile
);
1875 smash_to_memberptr_type (type
, domain
, memtype
);
1878 /* type attribute */
1880 const char *attr
= *pp
;
1882 /* Skip to the semicolon. */
1883 while (**pp
!= ';' && **pp
!= '\0')
1886 return error_type (pp
, objfile
);
1888 ++ * pp
; /* Skip the semicolon. */
1892 case 's': /* Size attribute */
1893 type_size
= atoi (attr
+ 1);
1898 case 'S': /* String attribute */
1899 /* FIXME: check to see if following type is array? */
1903 case 'V': /* Vector attribute */
1904 /* FIXME: check to see if following type is array? */
1909 /* Ignore unrecognized type attributes, so future compilers
1910 can invent new ones. */
1918 case '#': /* Method (class & fn) type */
1919 if ((*pp
)[0] == '#')
1921 /* We'll get the parameter types from the name. */
1922 struct type
*return_type
;
1925 return_type
= read_type (pp
, objfile
);
1926 if (*(*pp
)++ != ';')
1927 complaint (_("invalid (minimal) member type "
1928 "data format at symtab pos %d."),
1930 type
= allocate_stub_method (return_type
);
1931 if (typenums
[0] != -1)
1932 *dbx_lookup_type (typenums
, objfile
) = type
;
1936 struct type
*domain
= read_type (pp
, objfile
);
1937 struct type
*return_type
;
1942 /* Invalid member type data format. */
1943 return error_type (pp
, objfile
);
1947 return_type
= read_type (pp
, objfile
);
1948 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1950 return error_type (pp
, objfile
);
1951 type
= dbx_alloc_type (typenums
, objfile
);
1952 smash_to_method_type (type
, domain
, return_type
, args
,
1957 case 'r': /* Range type */
1958 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1959 if (typenums
[0] != -1)
1960 *dbx_lookup_type (typenums
, objfile
) = type
;
1965 /* Sun ACC builtin int type */
1966 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1967 if (typenums
[0] != -1)
1968 *dbx_lookup_type (typenums
, objfile
) = type
;
1972 case 'R': /* Sun ACC builtin float type */
1973 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1974 if (typenums
[0] != -1)
1975 *dbx_lookup_type (typenums
, objfile
) = type
;
1978 case 'e': /* Enumeration type */
1979 type
= dbx_alloc_type (typenums
, objfile
);
1980 type
= read_enum_type (pp
, type
, objfile
);
1981 if (typenums
[0] != -1)
1982 *dbx_lookup_type (typenums
, objfile
) = type
;
1985 case 's': /* Struct type */
1986 case 'u': /* Union type */
1988 enum type_code type_code
= TYPE_CODE_UNDEF
;
1989 type
= dbx_alloc_type (typenums
, objfile
);
1990 switch (type_descriptor
)
1993 type_code
= TYPE_CODE_STRUCT
;
1996 type_code
= TYPE_CODE_UNION
;
1999 type
= read_struct_type (pp
, type
, type_code
, objfile
);
2003 case 'a': /* Array type */
2005 return error_type (pp
, objfile
);
2008 type
= dbx_alloc_type (typenums
, objfile
);
2009 type
= read_array_type (pp
, type
, objfile
);
2011 type
->set_code (TYPE_CODE_STRING
);
2013 make_vector_type (type
);
2016 case 'S': /* Set type */
2017 type1
= read_type (pp
, objfile
);
2018 type
= create_set_type (NULL
, type1
);
2019 if (typenums
[0] != -1)
2020 *dbx_lookup_type (typenums
, objfile
) = type
;
2024 --*pp
; /* Go back to the symbol in error. */
2025 /* Particularly important if it was \0! */
2026 return error_type (pp
, objfile
);
2031 warning (_("GDB internal error, type is NULL in stabsread.c."));
2032 return error_type (pp
, objfile
);
2035 /* Size specified in a type attribute overrides any other size. */
2036 if (type_size
!= -1)
2037 type
->set_length ((type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
);
2042 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2043 Return the proper type node for a given builtin type number. */
2045 static const registry
<objfile
>::key
<struct type
*,
2046 gdb::noop_deleter
<struct type
*>>
2047 rs6000_builtin_type_data
;
2049 static struct type
*
2050 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2052 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2054 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2055 #define NUMBER_RECOGNIZED 34
2056 struct type
*rettype
= NULL
;
2058 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2060 complaint (_("Unknown builtin type %d"), typenum
);
2061 return objfile_type (objfile
)->builtin_error
;
2064 if (!negative_types
)
2066 /* This includes an empty slot for type number -0. */
2067 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2068 NUMBER_RECOGNIZED
+ 1, struct type
*);
2069 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2072 if (negative_types
[-typenum
] != NULL
)
2073 return negative_types
[-typenum
];
2075 #if TARGET_CHAR_BIT != 8
2076 #error This code wrong for TARGET_CHAR_BIT not 8
2077 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2078 that if that ever becomes not true, the correct fix will be to
2079 make the size in the struct type to be in bits, not in units of
2086 /* The size of this and all the other types are fixed, defined
2087 by the debugging format. If there is a type called "int" which
2088 is other than 32 bits, then it should use a new negative type
2089 number (or avoid negative type numbers for that case).
2090 See stabs.texinfo. */
2091 rettype
= init_integer_type (objfile
, 32, 0, "int");
2094 rettype
= init_integer_type (objfile
, 8, 0, "char");
2095 rettype
->set_has_no_signedness (true);
2098 rettype
= init_integer_type (objfile
, 16, 0, "short");
2101 rettype
= init_integer_type (objfile
, 32, 0, "long");
2104 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2107 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2110 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2113 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2116 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2119 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2122 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2125 /* IEEE single precision (32 bit). */
2126 rettype
= init_float_type (objfile
, 32, "float",
2127 floatformats_ieee_single
);
2130 /* IEEE double precision (64 bit). */
2131 rettype
= init_float_type (objfile
, 64, "double",
2132 floatformats_ieee_double
);
2135 /* This is an IEEE double on the RS/6000, and different machines with
2136 different sizes for "long double" should use different negative
2137 type numbers. See stabs.texinfo. */
2138 rettype
= init_float_type (objfile
, 64, "long double",
2139 floatformats_ieee_double
);
2142 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2145 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2148 rettype
= init_float_type (objfile
, 32, "short real",
2149 floatformats_ieee_single
);
2152 rettype
= init_float_type (objfile
, 64, "real",
2153 floatformats_ieee_double
);
2156 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2159 rettype
= init_character_type (objfile
, 8, 1, "character");
2162 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2165 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2168 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2171 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2174 /* Complex type consisting of two IEEE single precision values. */
2175 rettype
= init_complex_type ("complex",
2176 rs6000_builtin_type (12, objfile
));
2179 /* Complex type consisting of two IEEE double precision values. */
2180 rettype
= init_complex_type ("double complex",
2181 rs6000_builtin_type (13, objfile
));
2184 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2187 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2190 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2193 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2196 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2199 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2202 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2205 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2208 negative_types
[-typenum
] = rettype
;
2212 /* This page contains subroutines of read_type. */
2214 /* Wrapper around method_name_from_physname to flag a complaint
2215 if there is an error. */
2218 stabs_method_name_from_physname (const char *physname
)
2222 method_name
= method_name_from_physname (physname
);
2224 if (method_name
== NULL
)
2226 complaint (_("Method has bad physname %s\n"), physname
);
2233 /* Read member function stabs info for C++ classes. The form of each member
2236 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2238 An example with two member functions is:
2240 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2242 For the case of overloaded operators, the format is op$::*.funcs, where
2243 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2244 name (such as `+=') and `.' marks the end of the operator name.
2246 Returns 1 for success, 0 for failure. */
2249 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2250 struct type
*type
, struct objfile
*objfile
)
2257 struct next_fnfield
*next
;
2258 struct fn_field fn_field
;
2261 struct type
*look_ahead_type
;
2262 struct next_fnfieldlist
*new_fnlist
;
2263 struct next_fnfield
*new_sublist
;
2267 /* Process each list until we find something that is not a member function
2268 or find the end of the functions. */
2272 /* We should be positioned at the start of the function name.
2273 Scan forward to find the first ':' and if it is not the
2274 first of a "::" delimiter, then this is not a member function. */
2286 look_ahead_type
= NULL
;
2289 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2291 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2293 /* This is a completely wierd case. In order to stuff in the
2294 names that might contain colons (the usual name delimiter),
2295 Mike Tiemann defined a different name format which is
2296 signalled if the identifier is "op$". In that case, the
2297 format is "op$::XXXX." where XXXX is the name. This is
2298 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2299 /* This lets the user type "break operator+".
2300 We could just put in "+" as the name, but that wouldn't
2302 static char opname
[32] = "op$";
2303 char *o
= opname
+ 3;
2305 /* Skip past '::'. */
2308 STABS_CONTINUE (pp
, objfile
);
2314 main_fn_name
= savestring (opname
, o
- opname
);
2320 main_fn_name
= savestring (*pp
, p
- *pp
);
2321 /* Skip past '::'. */
2324 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2328 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2330 /* Check for and handle cretinous dbx symbol name continuation! */
2331 if (look_ahead_type
== NULL
)
2334 STABS_CONTINUE (pp
, objfile
);
2336 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2339 /* Invalid symtab info for member function. */
2345 /* g++ version 1 kludge */
2346 new_sublist
->fn_field
.type
= look_ahead_type
;
2347 look_ahead_type
= NULL
;
2357 /* These are methods, not functions. */
2358 if (new_sublist
->fn_field
.type
->code () == TYPE_CODE_FUNC
)
2359 new_sublist
->fn_field
.type
->set_code (TYPE_CODE_METHOD
);
2361 /* If this is just a stub, then we don't have the real name here. */
2362 if (new_sublist
->fn_field
.type
->is_stub ())
2364 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2365 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2366 new_sublist
->fn_field
.is_stub
= 1;
2369 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2372 /* Set this member function's visibility fields. */
2375 case VISIBILITY_PRIVATE
:
2376 new_sublist
->fn_field
.is_private
= 1;
2378 case VISIBILITY_PROTECTED
:
2379 new_sublist
->fn_field
.is_protected
= 1;
2383 STABS_CONTINUE (pp
, objfile
);
2386 case 'A': /* Normal functions. */
2387 new_sublist
->fn_field
.is_const
= 0;
2388 new_sublist
->fn_field
.is_volatile
= 0;
2391 case 'B': /* `const' member functions. */
2392 new_sublist
->fn_field
.is_const
= 1;
2393 new_sublist
->fn_field
.is_volatile
= 0;
2396 case 'C': /* `volatile' member function. */
2397 new_sublist
->fn_field
.is_const
= 0;
2398 new_sublist
->fn_field
.is_volatile
= 1;
2401 case 'D': /* `const volatile' member function. */
2402 new_sublist
->fn_field
.is_const
= 1;
2403 new_sublist
->fn_field
.is_volatile
= 1;
2406 case '*': /* File compiled with g++ version 1 --
2412 complaint (_("const/volatile indicator missing, got '%c'"),
2422 /* virtual member function, followed by index.
2423 The sign bit is set to distinguish pointers-to-methods
2424 from virtual function indicies. Since the array is
2425 in words, the quantity must be shifted left by 1
2426 on 16 bit machine, and by 2 on 32 bit machine, forcing
2427 the sign bit out, and usable as a valid index into
2428 the array. Remove the sign bit here. */
2429 new_sublist
->fn_field
.voffset
=
2430 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2434 STABS_CONTINUE (pp
, objfile
);
2435 if (**pp
== ';' || **pp
== '\0')
2437 /* Must be g++ version 1. */
2438 new_sublist
->fn_field
.fcontext
= 0;
2442 /* Figure out from whence this virtual function came.
2443 It may belong to virtual function table of
2444 one of its baseclasses. */
2445 look_ahead_type
= read_type (pp
, objfile
);
2448 /* g++ version 1 overloaded methods. */
2452 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2461 look_ahead_type
= NULL
;
2467 /* static member function. */
2469 int slen
= strlen (main_fn_name
);
2471 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2473 /* For static member functions, we can't tell if they
2474 are stubbed, as they are put out as functions, and not as
2476 GCC v2 emits the fully mangled name if
2477 dbxout.c:flag_minimal_debug is not set, so we have to
2478 detect a fully mangled physname here and set is_stub
2479 accordingly. Fully mangled physnames in v2 start with
2480 the member function name, followed by two underscores.
2481 GCC v3 currently always emits stubbed member functions,
2482 but with fully mangled physnames, which start with _Z. */
2483 if (!(strncmp (new_sublist
->fn_field
.physname
,
2484 main_fn_name
, slen
) == 0
2485 && new_sublist
->fn_field
.physname
[slen
] == '_'
2486 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2488 new_sublist
->fn_field
.is_stub
= 1;
2495 complaint (_("member function type missing, got '%c'"),
2497 /* Normal member function. */
2501 /* normal member function. */
2502 new_sublist
->fn_field
.voffset
= 0;
2503 new_sublist
->fn_field
.fcontext
= 0;
2507 new_sublist
->next
= sublist
;
2508 sublist
= new_sublist
;
2510 STABS_CONTINUE (pp
, objfile
);
2512 while (**pp
!= ';' && **pp
!= '\0');
2515 STABS_CONTINUE (pp
, objfile
);
2517 /* Skip GCC 3.X member functions which are duplicates of the callable
2518 constructor/destructor. */
2519 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2520 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2521 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2523 xfree (main_fn_name
);
2527 int has_destructor
= 0, has_other
= 0;
2529 struct next_fnfield
*tmp_sublist
;
2531 /* Various versions of GCC emit various mostly-useless
2532 strings in the name field for special member functions.
2534 For stub methods, we need to defer correcting the name
2535 until we are ready to unstub the method, because the current
2536 name string is used by gdb_mangle_name. The only stub methods
2537 of concern here are GNU v2 operators; other methods have their
2538 names correct (see caveat below).
2540 For non-stub methods, in GNU v3, we have a complete physname.
2541 Therefore we can safely correct the name now. This primarily
2542 affects constructors and destructors, whose name will be
2543 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2544 operators will also have incorrect names; for instance,
2545 "operator int" will be named "operator i" (i.e. the type is
2548 For non-stub methods in GNU v2, we have no easy way to
2549 know if we have a complete physname or not. For most
2550 methods the result depends on the platform (if CPLUS_MARKER
2551 can be `$' or `.', it will use minimal debug information, or
2552 otherwise the full physname will be included).
2554 Rather than dealing with this, we take a different approach.
2555 For v3 mangled names, we can use the full physname; for v2,
2556 we use cplus_demangle_opname (which is actually v2 specific),
2557 because the only interesting names are all operators - once again
2558 barring the caveat below. Skip this process if any method in the
2559 group is a stub, to prevent our fouling up the workings of
2562 The caveat: GCC 2.95.x (and earlier?) put constructors and
2563 destructors in the same method group. We need to split this
2564 into two groups, because they should have different names.
2565 So for each method group we check whether it contains both
2566 routines whose physname appears to be a destructor (the physnames
2567 for and destructors are always provided, due to quirks in v2
2568 mangling) and routines whose physname does not appear to be a
2569 destructor. If so then we break up the list into two halves.
2570 Even if the constructors and destructors aren't in the same group
2571 the destructor will still lack the leading tilde, so that also
2574 So, to summarize what we expect and handle here:
2576 Given Given Real Real Action
2577 method name physname physname method name
2579 __opi [none] __opi__3Foo operator int opname
2581 Foo _._3Foo _._3Foo ~Foo separate and
2583 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2584 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2587 tmp_sublist
= sublist
;
2588 while (tmp_sublist
!= NULL
)
2590 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2591 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2594 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2599 tmp_sublist
= tmp_sublist
->next
;
2602 if (has_destructor
&& has_other
)
2604 struct next_fnfieldlist
*destr_fnlist
;
2605 struct next_fnfield
*last_sublist
;
2607 /* Create a new fn_fieldlist for the destructors. */
2609 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2610 struct next_fnfieldlist
);
2612 destr_fnlist
->fn_fieldlist
.name
2613 = obconcat (&objfile
->objfile_obstack
, "~",
2614 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2616 destr_fnlist
->fn_fieldlist
.fn_fields
=
2617 XOBNEWVEC (&objfile
->objfile_obstack
,
2618 struct fn_field
, has_destructor
);
2619 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2620 sizeof (struct fn_field
) * has_destructor
);
2621 tmp_sublist
= sublist
;
2622 last_sublist
= NULL
;
2624 while (tmp_sublist
!= NULL
)
2626 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2628 tmp_sublist
= tmp_sublist
->next
;
2632 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2633 = tmp_sublist
->fn_field
;
2635 last_sublist
->next
= tmp_sublist
->next
;
2637 sublist
= tmp_sublist
->next
;
2638 last_sublist
= tmp_sublist
;
2639 tmp_sublist
= tmp_sublist
->next
;
2642 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2643 destr_fnlist
->next
= fip
->fnlist
;
2644 fip
->fnlist
= destr_fnlist
;
2646 length
-= has_destructor
;
2650 /* v3 mangling prevents the use of abbreviated physnames,
2651 so we can do this here. There are stubbed methods in v3
2653 - in -gstabs instead of -gstabs+
2654 - or for static methods, which are output as a function type
2655 instead of a method type. */
2656 char *new_method_name
=
2657 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2659 if (new_method_name
!= NULL
2660 && strcmp (new_method_name
,
2661 new_fnlist
->fn_fieldlist
.name
) != 0)
2663 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2664 xfree (main_fn_name
);
2667 xfree (new_method_name
);
2669 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2671 new_fnlist
->fn_fieldlist
.name
=
2672 obconcat (&objfile
->objfile_obstack
,
2673 "~", main_fn_name
, (char *)NULL
);
2674 xfree (main_fn_name
);
2677 new_fnlist
->fn_fieldlist
.fn_fields
2678 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2679 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2681 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2684 new_fnlist
->fn_fieldlist
.length
= length
;
2685 new_fnlist
->next
= fip
->fnlist
;
2686 fip
->fnlist
= new_fnlist
;
2693 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2694 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2695 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2696 memset (TYPE_FN_FIELDLISTS (type
), 0,
2697 sizeof (struct fn_fieldlist
) * nfn_fields
);
2698 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2704 /* Special GNU C++ name.
2706 Returns 1 for success, 0 for failure. "failure" means that we can't
2707 keep parsing and it's time for error_type(). */
2710 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2711 struct type
*type
, struct objfile
*objfile
)
2716 struct type
*context
;
2726 /* At this point, *pp points to something like "22:23=*22...",
2727 where the type number before the ':' is the "context" and
2728 everything after is a regular type definition. Lookup the
2729 type, find it's name, and construct the field name. */
2731 context
= read_type (pp
, objfile
);
2735 case 'f': /* $vf -- a virtual function table pointer */
2736 name
= context
->name ();
2741 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2742 vptr_name
, name
, (char *) NULL
));
2745 case 'b': /* $vb -- a virtual bsomethingorother */
2746 name
= context
->name ();
2749 complaint (_("C++ abbreviated type name "
2750 "unknown at symtab pos %d"),
2754 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2755 vb_name
, name
, (char *) NULL
));
2759 invalid_cpp_abbrev_complaint (*pp
);
2760 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2761 "INVALID_CPLUSPLUS_ABBREV",
2766 /* At this point, *pp points to the ':'. Skip it and read the
2772 invalid_cpp_abbrev_complaint (*pp
);
2775 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2777 (*pp
)++; /* Skip the comma. */
2784 fip
->list
->field
.set_loc_bitpos (read_huge_number (pp
, ';', &nbits
, 0));
2788 /* This field is unpacked. */
2789 FIELD_BITSIZE (fip
->list
->field
) = 0;
2790 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2794 invalid_cpp_abbrev_complaint (*pp
);
2795 /* We have no idea what syntax an unrecognized abbrev would have, so
2796 better return 0. If we returned 1, we would need to at least advance
2797 *pp to avoid an infinite loop. */
2804 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2805 const char *p
, struct type
*type
,
2806 struct objfile
*objfile
)
2808 struct gdbarch
*gdbarch
= objfile
->arch ();
2810 fip
->list
->field
.set_name
2811 (obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
));
2814 /* This means we have a visibility for a field coming. */
2818 fip
->list
->visibility
= *(*pp
)++;
2822 /* normal dbx-style format, no explicit visibility */
2823 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2826 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2831 /* Possible future hook for nested types. */
2834 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2844 /* Static class member. */
2845 fip
->list
->field
.set_loc_physname (savestring (*pp
, p
- *pp
));
2849 else if (**pp
!= ',')
2851 /* Bad structure-type format. */
2852 stabs_general_complaint ("bad structure-type format");
2856 (*pp
)++; /* Skip the comma. */
2861 fip
->list
->field
.set_loc_bitpos (read_huge_number (pp
, ',', &nbits
, 0));
2864 stabs_general_complaint ("bad structure-type format");
2867 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2870 stabs_general_complaint ("bad structure-type format");
2875 if (fip
->list
->field
.loc_bitpos () == 0
2876 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2878 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2879 it is a field which has been optimized out. The correct stab for
2880 this case is to use VISIBILITY_IGNORE, but that is a recent
2881 invention. (2) It is a 0-size array. For example
2882 union { int num; char str[0]; } foo. Printing _("<no value>" for
2883 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2884 will continue to work, and a 0-size array as a whole doesn't
2885 have any contents to print.
2887 I suspect this probably could also happen with gcc -gstabs (not
2888 -gstabs+) for static fields, and perhaps other C++ extensions.
2889 Hopefully few people use -gstabs with gdb, since it is intended
2890 for dbx compatibility. */
2892 /* Ignore this field. */
2893 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2897 /* Detect an unpacked field and mark it as such.
2898 dbx gives a bit size for all fields.
2899 Note that forward refs cannot be packed,
2900 and treat enums as if they had the width of ints. */
2902 struct type
*field_type
= check_typedef (fip
->list
->field
.type ());
2904 if (field_type
->code () != TYPE_CODE_INT
2905 && field_type
->code () != TYPE_CODE_RANGE
2906 && field_type
->code () != TYPE_CODE_BOOL
2907 && field_type
->code () != TYPE_CODE_ENUM
)
2909 FIELD_BITSIZE (fip
->list
->field
) = 0;
2911 if ((FIELD_BITSIZE (fip
->list
->field
)
2912 == TARGET_CHAR_BIT
* field_type
->length ()
2913 || (field_type
->code () == TYPE_CODE_ENUM
2914 && FIELD_BITSIZE (fip
->list
->field
)
2915 == gdbarch_int_bit (gdbarch
))
2918 fip
->list
->field
.loc_bitpos () % 8 == 0)
2920 FIELD_BITSIZE (fip
->list
->field
) = 0;
2926 /* Read struct or class data fields. They have the form:
2928 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2930 At the end, we see a semicolon instead of a field.
2932 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2935 The optional VISIBILITY is one of:
2937 '/0' (VISIBILITY_PRIVATE)
2938 '/1' (VISIBILITY_PROTECTED)
2939 '/2' (VISIBILITY_PUBLIC)
2940 '/9' (VISIBILITY_IGNORE)
2942 or nothing, for C style fields with public visibility.
2944 Returns 1 for success, 0 for failure. */
2947 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2948 struct type
*type
, struct objfile
*objfile
)
2951 struct stabs_nextfield
*newobj
;
2953 /* We better set p right now, in case there are no fields at all... */
2957 /* Read each data member type until we find the terminating ';' at the end of
2958 the data member list, or break for some other reason such as finding the
2959 start of the member function list. */
2960 /* Stab string for structure/union does not end with two ';' in
2961 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2963 while (**pp
!= ';' && **pp
!= '\0')
2965 STABS_CONTINUE (pp
, objfile
);
2966 /* Get space to record the next field's data. */
2967 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct stabs_nextfield
);
2969 newobj
->next
= fip
->list
;
2972 /* Get the field name. */
2975 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2976 unless the CPLUS_MARKER is followed by an underscore, in
2977 which case it is just the name of an anonymous type, which we
2978 should handle like any other type name. */
2980 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2982 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2987 /* Look for the ':' that separates the field name from the field
2988 values. Data members are delimited by a single ':', while member
2989 functions are delimited by a pair of ':'s. When we hit the member
2990 functions (if any), terminate scan loop and return. */
2992 while (*p
!= ':' && *p
!= '\0')
2999 /* Check to see if we have hit the member functions yet. */
3004 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
3006 if (p
[0] == ':' && p
[1] == ':')
3008 /* (the deleted) chill the list of fields: the last entry (at
3009 the head) is a partially constructed entry which we now
3011 fip
->list
= fip
->list
->next
;
3015 /* The stabs for C++ derived classes contain baseclass information which
3016 is marked by a '!' character after the total size. This function is
3017 called when we encounter the baseclass marker, and slurps up all the
3018 baseclass information.
3020 Immediately following the '!' marker is the number of base classes that
3021 the class is derived from, followed by information for each base class.
3022 For each base class, there are two visibility specifiers, a bit offset
3023 to the base class information within the derived class, a reference to
3024 the type for the base class, and a terminating semicolon.
3026 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3028 Baseclass information marker __________________|| | | | | | |
3029 Number of baseclasses __________________________| | | | | | |
3030 Visibility specifiers (2) ________________________| | | | | |
3031 Offset in bits from start of class _________________| | | | |
3032 Type number for base class ___________________________| | | |
3033 Visibility specifiers (2) _______________________________| | |
3034 Offset in bits from start of class ________________________| |
3035 Type number of base class ____________________________________|
3037 Return 1 for success, 0 for (error-type-inducing) failure. */
3042 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3043 struct type
*type
, struct objfile
*objfile
)
3046 struct stabs_nextfield
*newobj
;
3054 /* Skip the '!' baseclass information marker. */
3058 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3062 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3068 /* Some stupid compilers have trouble with the following, so break
3069 it up into simpler expressions. */
3070 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3071 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3074 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3077 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3078 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3082 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3084 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3086 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct stabs_nextfield
);
3088 newobj
->next
= fip
->list
;
3090 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3093 STABS_CONTINUE (pp
, objfile
);
3097 /* Nothing to do. */
3100 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3103 /* Unknown character. Complain and treat it as non-virtual. */
3105 complaint (_("Unknown virtual character `%c' for baseclass"),
3111 newobj
->visibility
= *(*pp
)++;
3112 switch (newobj
->visibility
)
3114 case VISIBILITY_PRIVATE
:
3115 case VISIBILITY_PROTECTED
:
3116 case VISIBILITY_PUBLIC
:
3119 /* Bad visibility format. Complain and treat it as
3122 complaint (_("Unknown visibility `%c' for baseclass"),
3123 newobj
->visibility
);
3124 newobj
->visibility
= VISIBILITY_PUBLIC
;
3131 /* The remaining value is the bit offset of the portion of the object
3132 corresponding to this baseclass. Always zero in the absence of
3133 multiple inheritance. */
3135 newobj
->field
.set_loc_bitpos (read_huge_number (pp
, ',', &nbits
, 0));
3140 /* The last piece of baseclass information is the type of the
3141 base class. Read it, and remember it's type name as this
3144 newobj
->field
.set_type (read_type (pp
, objfile
));
3145 newobj
->field
.set_name (newobj
->field
.type ()->name ());
3147 /* Skip trailing ';' and bump count of number of fields seen. */
3156 /* The tail end of stabs for C++ classes that contain a virtual function
3157 pointer contains a tilde, a %, and a type number.
3158 The type number refers to the base class (possibly this class itself) which
3159 contains the vtable pointer for the current class.
3161 This function is called when we have parsed all the method declarations,
3162 so we can look for the vptr base class info. */
3165 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3166 struct type
*type
, struct objfile
*objfile
)
3170 STABS_CONTINUE (pp
, objfile
);
3172 /* If we are positioned at a ';', then skip it. */
3182 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3184 /* Obsolete flags that used to indicate the presence
3185 of constructors and/or destructors. */
3189 /* Read either a '%' or the final ';'. */
3190 if (*(*pp
)++ == '%')
3192 /* The next number is the type number of the base class
3193 (possibly our own class) which supplies the vtable for
3194 this class. Parse it out, and search that class to find
3195 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3196 and TYPE_VPTR_FIELDNO. */
3201 t
= read_type (pp
, objfile
);
3203 while (*p
!= '\0' && *p
!= ';')
3209 /* Premature end of symbol. */
3213 set_type_vptr_basetype (type
, t
);
3214 if (type
== t
) /* Our own class provides vtbl ptr. */
3216 for (i
= t
->num_fields () - 1;
3217 i
>= TYPE_N_BASECLASSES (t
);
3220 const char *name
= t
->field (i
).name ();
3222 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3223 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3225 set_type_vptr_fieldno (type
, i
);
3229 /* Virtual function table field not found. */
3230 complaint (_("virtual function table pointer "
3231 "not found when defining class `%s'"),
3237 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3248 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3252 for (n
= TYPE_NFN_FIELDS (type
);
3253 fip
->fnlist
!= NULL
;
3254 fip
->fnlist
= fip
->fnlist
->next
)
3256 --n
; /* Circumvent Sun3 compiler bug. */
3257 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3262 /* Create the vector of fields, and record how big it is.
3263 We need this info to record proper virtual function table information
3264 for this class's virtual functions. */
3267 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3268 struct objfile
*objfile
)
3271 int non_public_fields
= 0;
3272 struct stabs_nextfield
*scan
;
3274 /* Count up the number of fields that we have, as well as taking note of
3275 whether or not there are any non-public fields, which requires us to
3276 allocate and build the private_field_bits and protected_field_bits
3279 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3282 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3284 non_public_fields
++;
3288 /* Now we know how many fields there are, and whether or not there are any
3289 non-public fields. Record the field count, allocate space for the
3290 array of fields, and create blank visibility bitfields if necessary. */
3292 type
->set_num_fields (nfields
);
3295 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
));
3296 memset (type
->fields (), 0, sizeof (struct field
) * nfields
);
3298 if (non_public_fields
)
3300 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3302 TYPE_FIELD_PRIVATE_BITS (type
) =
3303 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3304 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3306 TYPE_FIELD_PROTECTED_BITS (type
) =
3307 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3308 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3310 TYPE_FIELD_IGNORE_BITS (type
) =
3311 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3312 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3315 /* Copy the saved-up fields into the field vector. Start from the
3316 head of the list, adding to the tail of the field array, so that
3317 they end up in the same order in the array in which they were
3318 added to the list. */
3320 while (nfields
-- > 0)
3322 type
->field (nfields
) = fip
->list
->field
;
3323 switch (fip
->list
->visibility
)
3325 case VISIBILITY_PRIVATE
:
3326 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3329 case VISIBILITY_PROTECTED
:
3330 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3333 case VISIBILITY_IGNORE
:
3334 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3337 case VISIBILITY_PUBLIC
:
3341 /* Unknown visibility. Complain and treat it as public. */
3343 complaint (_("Unknown visibility `%c' for field"),
3344 fip
->list
->visibility
);
3348 fip
->list
= fip
->list
->next
;
3354 /* Complain that the compiler has emitted more than one definition for the
3355 structure type TYPE. */
3357 complain_about_struct_wipeout (struct type
*type
)
3359 const char *name
= "";
3360 const char *kind
= "";
3364 name
= type
->name ();
3365 switch (type
->code ())
3367 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3368 case TYPE_CODE_UNION
: kind
= "union "; break;
3369 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3379 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3382 /* Set the length for all variants of a same main_type, which are
3383 connected in the closed chain.
3385 This is something that needs to be done when a type is defined *after*
3386 some cross references to this type have already been read. Consider
3387 for instance the following scenario where we have the following two
3390 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3391 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3393 A stubbed version of type dummy is created while processing the first
3394 stabs entry. The length of that type is initially set to zero, since
3395 it is unknown at this point. Also, a "constant" variation of type
3396 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3399 The second stabs entry allows us to replace the stubbed definition
3400 with the real definition. However, we still need to adjust the length
3401 of the "constant" variation of that type, as its length was left
3402 untouched during the main type replacement... */
3405 set_length_in_type_chain (struct type
*type
)
3407 struct type
*ntype
= TYPE_CHAIN (type
);
3409 while (ntype
!= type
)
3411 if (ntype
->length () == 0)
3412 ntype
->set_length (type
->length ());
3414 complain_about_struct_wipeout (ntype
);
3415 ntype
= TYPE_CHAIN (ntype
);
3419 /* Read the description of a structure (or union type) and return an object
3420 describing the type.
3422 PP points to a character pointer that points to the next unconsumed token
3423 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3424 *PP will point to "4a:1,0,32;;".
3426 TYPE points to an incomplete type that needs to be filled in.
3428 OBJFILE points to the current objfile from which the stabs information is
3429 being read. (Note that it is redundant in that TYPE also contains a pointer
3430 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3433 static struct type
*
3434 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3435 struct objfile
*objfile
)
3437 struct stab_field_info fi
;
3439 /* When describing struct/union/class types in stabs, G++ always drops
3440 all qualifications from the name. So if you've got:
3441 struct A { ... struct B { ... }; ... };
3442 then G++ will emit stabs for `struct A::B' that call it simply
3443 `struct B'. Obviously, if you've got a real top-level definition for
3444 `struct B', or other nested definitions, this is going to cause
3447 Obviously, GDB can't fix this by itself, but it can at least avoid
3448 scribbling on existing structure type objects when new definitions
3450 if (! (type
->code () == TYPE_CODE_UNDEF
3451 || type
->is_stub ()))
3453 complain_about_struct_wipeout (type
);
3455 /* It's probably best to return the type unchanged. */
3459 INIT_CPLUS_SPECIFIC (type
);
3460 type
->set_code (type_code
);
3461 type
->set_is_stub (false);
3463 /* First comes the total size in bytes. */
3468 type
->set_length (read_huge_number (pp
, 0, &nbits
, 0));
3470 return error_type (pp
, objfile
);
3471 set_length_in_type_chain (type
);
3474 /* Now read the baseclasses, if any, read the regular C struct or C++
3475 class member fields, attach the fields to the type, read the C++
3476 member functions, attach them to the type, and then read any tilde
3477 field (baseclass specifier for the class holding the main vtable). */
3479 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3480 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3481 || !attach_fields_to_type (&fi
, type
, objfile
)
3482 || !read_member_functions (&fi
, pp
, type
, objfile
)
3483 || !attach_fn_fields_to_type (&fi
, type
)
3484 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3486 type
= error_type (pp
, objfile
);
3492 /* Read a definition of an array type,
3493 and create and return a suitable type object.
3494 Also creates a range type which represents the bounds of that
3497 static struct type
*
3498 read_array_type (const char **pp
, struct type
*type
,
3499 struct objfile
*objfile
)
3501 struct type
*index_type
, *element_type
, *range_type
;
3506 /* Format of an array type:
3507 "ar<index type>;lower;upper;<array_contents_type>".
3508 OS9000: "arlower,upper;<array_contents_type>".
3510 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3511 for these, produce a type like float[][]. */
3514 index_type
= read_type (pp
, objfile
);
3516 /* Improper format of array type decl. */
3517 return error_type (pp
, objfile
);
3521 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3526 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3529 return error_type (pp
, objfile
);
3531 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3536 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3538 return error_type (pp
, objfile
);
3540 element_type
= read_type (pp
, objfile
);
3549 create_static_range_type (NULL
, index_type
, lower
, upper
);
3550 type
= create_array_type (type
, element_type
, range_type
);
3556 /* Read a definition of an enumeration type,
3557 and create and return a suitable type object.
3558 Also defines the symbols that represent the values of the type. */
3560 static struct type
*
3561 read_enum_type (const char **pp
, struct type
*type
,
3562 struct objfile
*objfile
)
3564 struct gdbarch
*gdbarch
= objfile
->arch ();
3570 struct pending
**symlist
;
3571 struct pending
*osyms
, *syms
;
3574 int unsigned_enum
= 1;
3577 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3578 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3579 to do? For now, force all enum values to file scope. */
3580 if (within_function
)
3581 symlist
= get_local_symbols ();
3584 symlist
= get_file_symbols ();
3586 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3588 /* The aix4 compiler emits an extra field before the enum members;
3589 my guess is it's a type of some sort. Just ignore it. */
3592 /* Skip over the type. */
3596 /* Skip over the colon. */
3600 /* Read the value-names and their values.
3601 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3602 A semicolon or comma instead of a NAME means the end. */
3603 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3605 STABS_CONTINUE (pp
, objfile
);
3609 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3611 n
= read_huge_number (pp
, ',', &nbits
, 0);
3613 return error_type (pp
, objfile
);
3615 sym
= new (&objfile
->objfile_obstack
) symbol
;
3616 sym
->set_linkage_name (name
);
3617 sym
->set_language (get_current_subfile ()->language
,
3618 &objfile
->objfile_obstack
);
3619 sym
->set_aclass_index (LOC_CONST
);
3620 sym
->set_domain (VAR_DOMAIN
);
3621 sym
->set_value_longest (n
);
3624 add_symbol_to_list (sym
, symlist
);
3629 (*pp
)++; /* Skip the semicolon. */
3631 /* Now fill in the fields of the type-structure. */
3633 type
->set_length (gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
);
3634 set_length_in_type_chain (type
);
3635 type
->set_code (TYPE_CODE_ENUM
);
3636 type
->set_is_stub (false);
3638 type
->set_is_unsigned (true);
3639 type
->set_num_fields (nsyms
);
3642 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
));
3643 memset (type
->fields (), 0, sizeof (struct field
) * nsyms
);
3645 /* Find the symbols for the values and put them into the type.
3646 The symbols can be found in the symlist that we put them on
3647 to cause them to be defined. osyms contains the old value
3648 of that symlist; everything up to there was defined by us. */
3649 /* Note that we preserve the order of the enum constants, so
3650 that in something like "enum {FOO, LAST_THING=FOO}" we print
3651 FOO, not LAST_THING. */
3653 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3655 int last
= syms
== osyms
? o_nsyms
: 0;
3656 int j
= syms
->nsyms
;
3658 for (; --j
>= last
; --n
)
3660 struct symbol
*xsym
= syms
->symbol
[j
];
3662 xsym
->set_type (type
);
3663 type
->field (n
).set_name (xsym
->linkage_name ());
3664 type
->field (n
).set_loc_enumval (xsym
->value_longest ());
3665 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3674 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3675 typedefs in every file (for int, long, etc):
3677 type = b <signed> <width> <format type>; <offset>; <nbits>
3679 optional format type = c or b for char or boolean.
3680 offset = offset from high order bit to start bit of type.
3681 width is # bytes in object of this type, nbits is # bits in type.
3683 The width/offset stuff appears to be for small objects stored in
3684 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3687 static struct type
*
3688 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3693 int boolean_type
= 0;
3704 return error_type (pp
, objfile
);
3708 /* For some odd reason, all forms of char put a c here. This is strange
3709 because no other type has this honor. We can safely ignore this because
3710 we actually determine 'char'acterness by the number of bits specified in
3712 Boolean forms, e.g Fortran logical*X, put a b here. */
3716 else if (**pp
== 'b')
3722 /* The first number appears to be the number of bytes occupied
3723 by this type, except that unsigned short is 4 instead of 2.
3724 Since this information is redundant with the third number,
3725 we will ignore it. */
3726 read_huge_number (pp
, ';', &nbits
, 0);
3728 return error_type (pp
, objfile
);
3730 /* The second number is always 0, so ignore it too. */
3731 read_huge_number (pp
, ';', &nbits
, 0);
3733 return error_type (pp
, objfile
);
3735 /* The third number is the number of bits for this type. */
3736 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3738 return error_type (pp
, objfile
);
3739 /* The type *should* end with a semicolon. If it are embedded
3740 in a larger type the semicolon may be the only way to know where
3741 the type ends. If this type is at the end of the stabstring we
3742 can deal with the omitted semicolon (but we don't have to like
3743 it). Don't bother to complain(), Sun's compiler omits the semicolon
3750 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3751 TARGET_CHAR_BIT
, NULL
);
3753 type
->set_is_unsigned (true);
3759 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3761 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3764 static struct type
*
3765 read_sun_floating_type (const char **pp
, int typenums
[2],
3766 struct objfile
*objfile
)
3771 struct type
*rettype
;
3773 /* The first number has more details about the type, for example
3775 details
= read_huge_number (pp
, ';', &nbits
, 0);
3777 return error_type (pp
, objfile
);
3779 /* The second number is the number of bytes occupied by this type. */
3780 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3782 return error_type (pp
, objfile
);
3784 nbits
= nbytes
* TARGET_CHAR_BIT
;
3786 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3787 || details
== NF_COMPLEX32
)
3789 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3790 return init_complex_type (NULL
, rettype
);
3793 return dbx_init_float_type (objfile
, nbits
);
3796 /* Read a number from the string pointed to by *PP.
3797 The value of *PP is advanced over the number.
3798 If END is nonzero, the character that ends the
3799 number must match END, or an error happens;
3800 and that character is skipped if it does match.
3801 If END is zero, *PP is left pointing to that character.
3803 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3804 the number is represented in an octal representation, assume that
3805 it is represented in a 2's complement representation with a size of
3806 TWOS_COMPLEMENT_BITS.
3808 If the number fits in a long, set *BITS to 0 and return the value.
3809 If not, set *BITS to be the number of bits in the number and return 0.
3811 If encounter garbage, set *BITS to -1 and return 0. */
3814 read_huge_number (const char **pp
, int end
, int *bits
,
3815 int twos_complement_bits
)
3817 const char *p
= *pp
;
3826 int twos_complement_representation
= 0;
3834 /* Leading zero means octal. GCC uses this to output values larger
3835 than an int (because that would be hard in decimal). */
3842 /* Skip extra zeros. */
3846 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3848 /* Octal, possibly signed. Check if we have enough chars for a
3854 while ((c
= *p1
) >= '0' && c
< '8')
3858 if (len
> twos_complement_bits
/ 3
3859 || (twos_complement_bits
% 3 == 0
3860 && len
== twos_complement_bits
/ 3))
3862 /* Ok, we have enough characters for a signed value, check
3863 for signedness by testing if the sign bit is set. */
3864 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3866 if (c
& (1 << sign_bit
))
3868 /* Definitely signed. */
3869 twos_complement_representation
= 1;
3875 upper_limit
= LONG_MAX
/ radix
;
3877 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3879 if (n
<= upper_limit
)
3881 if (twos_complement_representation
)
3883 /* Octal, signed, twos complement representation. In
3884 this case, n is the corresponding absolute value. */
3887 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3899 /* unsigned representation */
3901 n
+= c
- '0'; /* FIXME this overflows anyway. */
3907 /* This depends on large values being output in octal, which is
3914 /* Ignore leading zeroes. */
3918 else if (c
== '2' || c
== '3')
3939 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3941 /* We were supposed to parse a number with maximum
3942 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3953 /* Large decimal constants are an error (because it is hard to
3954 count how many bits are in them). */
3960 /* -0x7f is the same as 0x80. So deal with it by adding one to
3961 the number of bits. Two's complement represention octals
3962 can't have a '-' in front. */
3963 if (sign
== -1 && !twos_complement_representation
)
3974 /* It's *BITS which has the interesting information. */
3978 static struct type
*
3979 read_range_type (const char **pp
, int typenums
[2], int type_size
,
3980 struct objfile
*objfile
)
3982 struct gdbarch
*gdbarch
= objfile
->arch ();
3983 const char *orig_pp
= *pp
;
3988 struct type
*result_type
;
3989 struct type
*index_type
= NULL
;
3991 /* First comes a type we are a subrange of.
3992 In C it is usually 0, 1 or the type being defined. */
3993 if (read_type_number (pp
, rangenums
) != 0)
3994 return error_type (pp
, objfile
);
3995 self_subrange
= (rangenums
[0] == typenums
[0] &&
3996 rangenums
[1] == typenums
[1]);
4001 index_type
= read_type (pp
, objfile
);
4004 /* A semicolon should now follow; skip it. */
4008 /* The remaining two operands are usually lower and upper bounds
4009 of the range. But in some special cases they mean something else. */
4010 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
4011 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
4013 if (n2bits
== -1 || n3bits
== -1)
4014 return error_type (pp
, objfile
);
4017 goto handle_true_range
;
4019 /* If limits are huge, must be large integral type. */
4020 if (n2bits
!= 0 || n3bits
!= 0)
4022 char got_signed
= 0;
4023 char got_unsigned
= 0;
4024 /* Number of bits in the type. */
4027 /* If a type size attribute has been specified, the bounds of
4028 the range should fit in this size. If the lower bounds needs
4029 more bits than the upper bound, then the type is signed. */
4030 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4032 if (n2bits
== type_size
&& n2bits
> n3bits
)
4038 /* Range from 0 to <large number> is an unsigned large integral type. */
4039 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4044 /* Range from <large number> to <large number>-1 is a large signed
4045 integral type. Take care of the case where <large number> doesn't
4046 fit in a long but <large number>-1 does. */
4047 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4048 || (n2bits
!= 0 && n3bits
== 0
4049 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4056 if (got_signed
|| got_unsigned
)
4057 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4059 return error_type (pp
, objfile
);
4062 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4063 if (self_subrange
&& n2
== 0 && n3
== 0)
4064 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4066 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4067 is the width in bytes.
4069 Fortran programs appear to use this for complex types also. To
4070 distinguish between floats and complex, g77 (and others?) seem
4071 to use self-subranges for the complexes, and subranges of int for
4074 Also note that for complexes, g77 sets n2 to the size of one of
4075 the member floats, not the whole complex beast. My guess is that
4076 this was to work well with pre-COMPLEX versions of gdb. */
4078 if (n3
== 0 && n2
> 0)
4080 struct type
*float_type
4081 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4084 return init_complex_type (NULL
, float_type
);
4089 /* If the upper bound is -1, it must really be an unsigned integral. */
4091 else if (n2
== 0 && n3
== -1)
4093 int bits
= type_size
;
4097 /* We don't know its size. It is unsigned int or unsigned
4098 long. GCC 2.3.3 uses this for long long too, but that is
4099 just a GDB 3.5 compatibility hack. */
4100 bits
= gdbarch_int_bit (gdbarch
);
4103 return init_integer_type (objfile
, bits
, 1, NULL
);
4106 /* Special case: char is defined (Who knows why) as a subrange of
4107 itself with range 0-127. */
4108 else if (self_subrange
&& n2
== 0 && n3
== 127)
4110 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4112 type
->set_has_no_signedness (true);
4115 /* We used to do this only for subrange of self or subrange of int. */
4118 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4119 "unsigned long", and we already checked for that,
4120 so don't need to test for it here. */
4123 /* n3 actually gives the size. */
4124 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4126 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4127 unsigned n-byte integer. But do require n to be a power of
4128 two; we don't want 3- and 5-byte integers flying around. */
4134 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4137 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4138 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4141 /* I think this is for Convex "long long". Since I don't know whether
4142 Convex sets self_subrange, I also accept that particular size regardless
4143 of self_subrange. */
4144 else if (n3
== 0 && n2
< 0
4146 || n2
== -gdbarch_long_long_bit
4147 (gdbarch
) / TARGET_CHAR_BIT
))
4148 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4149 else if (n2
== -n3
- 1)
4152 return init_integer_type (objfile
, 8, 0, NULL
);
4154 return init_integer_type (objfile
, 16, 0, NULL
);
4155 if (n3
== 0x7fffffff)
4156 return init_integer_type (objfile
, 32, 0, NULL
);
4159 /* We have a real range type on our hands. Allocate space and
4160 return a real pointer. */
4164 index_type
= objfile_type (objfile
)->builtin_int
;
4166 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4167 if (index_type
== NULL
)
4169 /* Does this actually ever happen? Is that why we are worrying
4170 about dealing with it rather than just calling error_type? */
4172 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4174 index_type
= objfile_type (objfile
)->builtin_int
;
4178 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4179 return (result_type
);
4182 /* Read in an argument list. This is a list of types, separated by commas
4183 and terminated with END. Return the list of types read in, or NULL
4184 if there is an error. */
4186 static struct field
*
4187 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4190 /* FIXME! Remove this arbitrary limit! */
4191 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4198 /* Invalid argument list: no ','. */
4201 STABS_CONTINUE (pp
, objfile
);
4202 types
[n
++] = read_type (pp
, objfile
);
4204 (*pp
)++; /* get past `end' (the ':' character). */
4208 /* We should read at least the THIS parameter here. Some broken stabs
4209 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4210 have been present ";-16,(0,43)" reference instead. This way the
4211 excessive ";" marker prematurely stops the parameters parsing. */
4213 complaint (_("Invalid (empty) method arguments"));
4216 else if (types
[n
- 1]->code () != TYPE_CODE_VOID
)
4224 rval
= XCNEWVEC (struct field
, n
);
4225 for (i
= 0; i
< n
; i
++)
4226 rval
[i
].set_type (types
[i
]);
4231 /* Common block handling. */
4233 /* List of symbols declared since the last BCOMM. This list is a tail
4234 of local_symbols. When ECOMM is seen, the symbols on the list
4235 are noted so their proper addresses can be filled in later,
4236 using the common block base address gotten from the assembler
4239 static struct pending
*common_block
;
4240 static int common_block_i
;
4242 /* Name of the current common block. We get it from the BCOMM instead of the
4243 ECOMM to match IBM documentation (even though IBM puts the name both places
4244 like everyone else). */
4245 static char *common_block_name
;
4247 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4248 to remain after this function returns. */
4251 common_block_start (const char *name
, struct objfile
*objfile
)
4253 if (common_block_name
!= NULL
)
4255 complaint (_("Invalid symbol data: common block within common block"));
4257 common_block
= *get_local_symbols ();
4258 common_block_i
= common_block
? common_block
->nsyms
: 0;
4259 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4262 /* Process a N_ECOMM symbol. */
4265 common_block_end (struct objfile
*objfile
)
4267 /* Symbols declared since the BCOMM are to have the common block
4268 start address added in when we know it. common_block and
4269 common_block_i point to the first symbol after the BCOMM in
4270 the local_symbols list; copy the list and hang it off the
4271 symbol for the common block name for later fixup. */
4274 struct pending
*newobj
= 0;
4275 struct pending
*next
;
4278 if (common_block_name
== NULL
)
4280 complaint (_("ECOMM symbol unmatched by BCOMM"));
4284 sym
= new (&objfile
->objfile_obstack
) symbol
;
4285 /* Note: common_block_name already saved on objfile_obstack. */
4286 sym
->set_linkage_name (common_block_name
);
4287 sym
->set_aclass_index (LOC_BLOCK
);
4289 /* Now we copy all the symbols which have been defined since the BCOMM. */
4291 /* Copy all the struct pendings before common_block. */
4292 for (next
= *get_local_symbols ();
4293 next
!= NULL
&& next
!= common_block
;
4296 for (j
= 0; j
< next
->nsyms
; j
++)
4297 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4300 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4301 NULL, it means copy all the local symbols (which we already did
4304 if (common_block
!= NULL
)
4305 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4306 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4308 sym
->set_type ((struct type
*) newobj
);
4310 /* Should we be putting local_symbols back to what it was?
4313 i
= hashname (sym
->linkage_name ());
4314 sym
->set_value_chain (global_sym_chain
[i
]);
4315 global_sym_chain
[i
] = sym
;
4316 common_block_name
= NULL
;
4319 /* Add a common block's start address to the offset of each symbol
4320 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4321 the common block name). */
4324 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
, int section_index
)
4326 struct pending
*next
= (struct pending
*) sym
->type ();
4328 for (; next
; next
= next
->next
)
4332 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4334 next
->symbol
[j
]->set_value_address
4335 (next
->symbol
[j
]->value_address () + valu
);
4336 next
->symbol
[j
]->set_section_index (section_index
);
4343 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4344 See add_undefined_type for more details. */
4347 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4351 nat
.typenums
[0] = typenums
[0];
4352 nat
.typenums
[1] = typenums
[1];
4355 if (noname_undefs_length
== noname_undefs_allocated
)
4357 noname_undefs_allocated
*= 2;
4358 noname_undefs
= (struct nat
*)
4359 xrealloc ((char *) noname_undefs
,
4360 noname_undefs_allocated
* sizeof (struct nat
));
4362 noname_undefs
[noname_undefs_length
++] = nat
;
4365 /* Add TYPE to the UNDEF_TYPES vector.
4366 See add_undefined_type for more details. */
4369 add_undefined_type_1 (struct type
*type
)
4371 if (undef_types_length
== undef_types_allocated
)
4373 undef_types_allocated
*= 2;
4374 undef_types
= (struct type
**)
4375 xrealloc ((char *) undef_types
,
4376 undef_types_allocated
* sizeof (struct type
*));
4378 undef_types
[undef_types_length
++] = type
;
4381 /* What about types defined as forward references inside of a small lexical
4383 /* Add a type to the list of undefined types to be checked through
4384 once this file has been read in.
4386 In practice, we actually maintain two such lists: The first list
4387 (UNDEF_TYPES) is used for types whose name has been provided, and
4388 concerns forward references (eg 'xs' or 'xu' forward references);
4389 the second list (NONAME_UNDEFS) is used for types whose name is
4390 unknown at creation time, because they were referenced through
4391 their type number before the actual type was declared.
4392 This function actually adds the given type to the proper list. */
4395 add_undefined_type (struct type
*type
, int typenums
[2])
4397 if (type
->name () == NULL
)
4398 add_undefined_type_noname (type
, typenums
);
4400 add_undefined_type_1 (type
);
4403 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4406 cleanup_undefined_types_noname (struct objfile
*objfile
)
4410 for (i
= 0; i
< noname_undefs_length
; i
++)
4412 struct nat nat
= noname_undefs
[i
];
4415 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4416 if (nat
.type
!= *type
&& (*type
)->code () != TYPE_CODE_UNDEF
)
4418 /* The instance flags of the undefined type are still unset,
4419 and needs to be copied over from the reference type.
4420 Since replace_type expects them to be identical, we need
4421 to set these flags manually before hand. */
4422 nat
.type
->set_instance_flags ((*type
)->instance_flags ());
4423 replace_type (nat
.type
, *type
);
4427 noname_undefs_length
= 0;
4430 /* Go through each undefined type, see if it's still undefined, and fix it
4431 up if possible. We have two kinds of undefined types:
4433 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4434 Fix: update array length using the element bounds
4435 and the target type's length.
4436 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4437 yet defined at the time a pointer to it was made.
4438 Fix: Do a full lookup on the struct/union tag. */
4441 cleanup_undefined_types_1 (void)
4445 /* Iterate over every undefined type, and look for a symbol whose type
4446 matches our undefined type. The symbol matches if:
4447 1. It is a typedef in the STRUCT domain;
4448 2. It has the same name, and same type code;
4449 3. The instance flags are identical.
4451 It is important to check the instance flags, because we have seen
4452 examples where the debug info contained definitions such as:
4454 "foo_t:t30=B31=xefoo_t:"
4456 In this case, we have created an undefined type named "foo_t" whose
4457 instance flags is null (when processing "xefoo_t"), and then created
4458 another type with the same name, but with different instance flags
4459 ('B' means volatile). I think that the definition above is wrong,
4460 since the same type cannot be volatile and non-volatile at the same
4461 time, but we need to be able to cope with it when it happens. The
4462 approach taken here is to treat these two types as different. */
4464 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4466 switch ((*type
)->code ())
4469 case TYPE_CODE_STRUCT
:
4470 case TYPE_CODE_UNION
:
4471 case TYPE_CODE_ENUM
:
4473 /* Check if it has been defined since. Need to do this here
4474 as well as in check_typedef to deal with the (legitimate in
4475 C though not C++) case of several types with the same name
4476 in different source files. */
4477 if ((*type
)->is_stub ())
4479 struct pending
*ppt
;
4481 /* Name of the type, without "struct" or "union". */
4482 const char *type_name
= (*type
)->name ();
4484 if (type_name
== NULL
)
4486 complaint (_("need a type name"));
4489 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4491 for (i
= 0; i
< ppt
->nsyms
; i
++)
4493 struct symbol
*sym
= ppt
->symbol
[i
];
4495 if (sym
->aclass () == LOC_TYPEDEF
4496 && sym
->domain () == STRUCT_DOMAIN
4497 && (sym
->type ()->code () == (*type
)->code ())
4498 && ((*type
)->instance_flags ()
4499 == sym
->type ()->instance_flags ())
4500 && strcmp (sym
->linkage_name (), type_name
) == 0)
4501 replace_type (*type
, sym
->type ());
4510 complaint (_("forward-referenced types left unresolved, "
4518 undef_types_length
= 0;
4521 /* Try to fix all the undefined types we encountered while processing
4525 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4527 cleanup_undefined_types_1 ();
4528 cleanup_undefined_types_noname (objfile
);
4531 /* See stabsread.h. */
4534 scan_file_globals (struct objfile
*objfile
)
4537 struct symbol
*sym
, *prev
;
4538 struct objfile
*resolve_objfile
;
4540 /* SVR4 based linkers copy referenced global symbols from shared
4541 libraries to the main executable.
4542 If we are scanning the symbols for a shared library, try to resolve
4543 them from the minimal symbols of the main executable first. */
4545 if (current_program_space
->symfile_object_file
4546 && objfile
!= current_program_space
->symfile_object_file
)
4547 resolve_objfile
= current_program_space
->symfile_object_file
;
4549 resolve_objfile
= objfile
;
4553 /* Avoid expensive loop through all minimal symbols if there are
4554 no unresolved symbols. */
4555 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4557 if (global_sym_chain
[hash
])
4560 if (hash
>= HASHSIZE
)
4563 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4567 /* Skip static symbols. */
4568 switch (msymbol
->type ())
4580 /* Get the hash index and check all the symbols
4581 under that hash index. */
4583 hash
= hashname (msymbol
->linkage_name ());
4585 for (sym
= global_sym_chain
[hash
]; sym
;)
4587 if (strcmp (msymbol
->linkage_name (), sym
->linkage_name ()) == 0)
4589 /* Splice this symbol out of the hash chain and
4590 assign the value we have to it. */
4593 prev
->set_value_chain (sym
->value_chain ());
4597 global_sym_chain
[hash
] = sym
->value_chain ();
4600 /* Check to see whether we need to fix up a common block. */
4601 /* Note: this code might be executed several times for
4602 the same symbol if there are multiple references. */
4605 if (sym
->aclass () == LOC_BLOCK
)
4607 (sym
, msymbol
->value_address (resolve_objfile
),
4608 msymbol
->section_index ());
4610 sym
->set_value_address
4611 (msymbol
->value_address (resolve_objfile
));
4612 sym
->set_section_index (msymbol
->section_index ());
4617 sym
= prev
->value_chain ();
4621 sym
= global_sym_chain
[hash
];
4627 sym
= sym
->value_chain ();
4631 if (resolve_objfile
== objfile
)
4633 resolve_objfile
= objfile
;
4636 /* Change the storage class of any remaining unresolved globals to
4637 LOC_UNRESOLVED and remove them from the chain. */
4638 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4640 sym
= global_sym_chain
[hash
];
4644 sym
= sym
->value_chain ();
4646 /* Change the symbol address from the misleading chain value
4648 prev
->set_value_address (0);
4650 /* Complain about unresolved common block symbols. */
4651 if (prev
->aclass () == LOC_STATIC
)
4652 prev
->set_aclass_index (LOC_UNRESOLVED
);
4654 complaint (_("%s: common block `%s' from "
4655 "global_sym_chain unresolved"),
4656 objfile_name (objfile
), prev
->print_name ());
4659 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4662 /* Initialize anything that needs initializing when starting to read
4663 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4667 stabsread_init (void)
4671 /* Initialize anything that needs initializing when a completely new
4672 symbol file is specified (not just adding some symbols from another
4673 file, e.g. a shared library). */
4676 stabsread_new_init (void)
4678 /* Empty the hash table of global syms looking for values. */
4679 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4682 /* Initialize anything that needs initializing at the same time as
4683 start_compunit_symtab() is called. */
4688 global_stabs
= NULL
; /* AIX COFF */
4689 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4690 n_this_object_header_files
= 1;
4691 type_vector_length
= 0;
4692 type_vector
= (struct type
**) 0;
4693 within_function
= 0;
4695 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4696 common_block_name
= NULL
;
4699 /* Call after end_compunit_symtab(). */
4706 xfree (type_vector
);
4709 type_vector_length
= 0;
4710 previous_stab_code
= 0;
4714 finish_global_stabs (struct objfile
*objfile
)
4718 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4719 xfree (global_stabs
);
4720 global_stabs
= NULL
;
4724 /* Find the end of the name, delimited by a ':', but don't match
4725 ObjC symbols which look like -[Foo bar::]:bla. */
4727 find_name_end (const char *name
)
4729 const char *s
= name
;
4731 if (s
[0] == '-' || *s
== '+')
4733 /* Must be an ObjC method symbol. */
4736 error (_("invalid symbol name \"%s\""), name
);
4738 s
= strchr (s
, ']');
4741 error (_("invalid symbol name \"%s\""), name
);
4743 return strchr (s
, ':');
4747 return strchr (s
, ':');
4751 /* See stabsread.h. */
4754 hashname (const char *name
)
4756 return fast_hash (name
, strlen (name
)) % HASHSIZE
;
4759 /* Initializer for this module. */
4761 void _initialize_stabsread ();
4763 _initialize_stabsread ()
4765 undef_types_allocated
= 20;
4766 undef_types_length
= 0;
4767 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4769 noname_undefs_allocated
= 20;
4770 noname_undefs_length
= 0;
4771 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4773 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4774 &stab_register_funcs
);
4775 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4776 &stab_register_funcs
);