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 /* Read type information or a type definition; return the type. Even
1468 though this routine accepts either type information or a type
1469 definition, the distinction is relevant--some parts of stabsread.c
1470 assume that type information starts with a digit, '-', or '(' in
1471 deciding whether to call read_type. */
1473 static struct type
*
1474 read_type (const char **pp
, struct objfile
*objfile
)
1476 struct type
*type
= 0;
1479 char type_descriptor
;
1481 /* Size in bits of type if specified by a type attribute, or -1 if
1482 there is no size attribute. */
1485 /* Used to distinguish string and bitstring from char-array and set. */
1488 /* Used to distinguish vector from array. */
1491 /* Read type number if present. The type number may be omitted.
1492 for instance in a two-dimensional array declared with type
1493 "ar1;1;10;ar1;1;10;4". */
1494 if ((**pp
>= '0' && **pp
<= '9')
1498 if (read_type_number (pp
, typenums
) != 0)
1499 return error_type (pp
, objfile
);
1503 /* Type is not being defined here. Either it already
1504 exists, or this is a forward reference to it.
1505 dbx_alloc_type handles both cases. */
1506 type
= dbx_alloc_type (typenums
, objfile
);
1508 /* If this is a forward reference, arrange to complain if it
1509 doesn't get patched up by the time we're done
1511 if (type
->code () == TYPE_CODE_UNDEF
)
1512 add_undefined_type (type
, typenums
);
1517 /* Type is being defined here. */
1519 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1524 /* 'typenums=' not present, type is anonymous. Read and return
1525 the definition, but don't put it in the type vector. */
1526 typenums
[0] = typenums
[1] = -1;
1531 type_descriptor
= (*pp
)[-1];
1532 switch (type_descriptor
)
1536 enum type_code code
;
1538 /* Used to index through file_symbols. */
1539 struct pending
*ppt
;
1542 /* Name including "struct", etc. */
1546 const char *from
, *p
, *q1
, *q2
;
1548 /* Set the type code according to the following letter. */
1552 code
= TYPE_CODE_STRUCT
;
1555 code
= TYPE_CODE_UNION
;
1558 code
= TYPE_CODE_ENUM
;
1562 /* Complain and keep going, so compilers can invent new
1563 cross-reference types. */
1564 complaint (_("Unrecognized cross-reference type `%c'"),
1566 code
= TYPE_CODE_STRUCT
;
1571 q1
= strchr (*pp
, '<');
1572 p
= strchr (*pp
, ':');
1574 return error_type (pp
, objfile
);
1575 if (q1
&& p
> q1
&& p
[1] == ':')
1577 int nesting_level
= 0;
1579 for (q2
= q1
; *q2
; q2
++)
1583 else if (*q2
== '>')
1585 else if (*q2
== ':' && nesting_level
== 0)
1590 return error_type (pp
, objfile
);
1593 if (get_current_subfile ()->language
== language_cplus
)
1595 std::string
name (*pp
, p
- *pp
);
1596 gdb::unique_xmalloc_ptr
<char> new_name
1597 = cp_canonicalize_string (name
.c_str ());
1598 if (new_name
!= nullptr)
1599 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1602 else if (get_current_subfile ()->language
== language_c
)
1604 std::string
name (*pp
, p
- *pp
);
1605 gdb::unique_xmalloc_ptr
<char> new_name
1606 = c_canonicalize_name (name
.c_str ());
1607 if (new_name
!= nullptr)
1608 type_name
= obstack_strdup (&objfile
->objfile_obstack
,
1611 if (type_name
== NULL
)
1613 char *to
= type_name
= (char *)
1614 obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1616 /* Copy the name. */
1623 /* Set the pointer ahead of the name which we just read, and
1628 /* If this type has already been declared, then reuse the same
1629 type, rather than allocating a new one. This saves some
1632 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
1633 for (i
= 0; i
< ppt
->nsyms
; i
++)
1635 struct symbol
*sym
= ppt
->symbol
[i
];
1637 if (sym
->aclass () == LOC_TYPEDEF
1638 && sym
->domain () == STRUCT_DOMAIN
1639 && (sym
->type ()->code () == code
)
1640 && strcmp (sym
->linkage_name (), type_name
) == 0)
1642 obstack_free (&objfile
->objfile_obstack
, type_name
);
1643 type
= sym
->type ();
1644 if (typenums
[0] != -1)
1645 *dbx_lookup_type (typenums
, objfile
) = type
;
1650 /* Didn't find the type to which this refers, so we must
1651 be dealing with a forward reference. Allocate a type
1652 structure for it, and keep track of it so we can
1653 fill in the rest of the fields when we get the full
1655 type
= dbx_alloc_type (typenums
, objfile
);
1656 type
->set_code (code
);
1657 type
->set_name (type_name
);
1658 INIT_CPLUS_SPECIFIC (type
);
1659 type
->set_is_stub (true);
1661 add_undefined_type (type
, typenums
);
1665 case '-': /* RS/6000 built-in type */
1679 /* We deal with something like t(1,2)=(3,4)=... which
1680 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1682 /* Allocate and enter the typedef type first.
1683 This handles recursive types. */
1684 type
= dbx_alloc_type (typenums
, objfile
);
1685 type
->set_code (TYPE_CODE_TYPEDEF
);
1687 struct type
*xtype
= read_type (pp
, objfile
);
1691 /* It's being defined as itself. That means it is "void". */
1692 type
->set_code (TYPE_CODE_VOID
);
1693 type
->set_length (1);
1695 else if (type_size
>= 0 || is_string
)
1697 /* This is the absolute wrong way to construct types. Every
1698 other debug format has found a way around this problem and
1699 the related problems with unnecessarily stubbed types;
1700 someone motivated should attempt to clean up the issue
1701 here as well. Once a type pointed to has been created it
1702 should not be modified.
1704 Well, it's not *absolutely* wrong. Constructing recursive
1705 types (trees, linked lists) necessarily entails modifying
1706 types after creating them. Constructing any loop structure
1707 entails side effects. The Dwarf 2 reader does handle this
1708 more gracefully (it never constructs more than once
1709 instance of a type object, so it doesn't have to copy type
1710 objects wholesale), but it still mutates type objects after
1711 other folks have references to them.
1713 Keep in mind that this circularity/mutation issue shows up
1714 at the source language level, too: C's "incomplete types",
1715 for example. So the proper cleanup, I think, would be to
1716 limit GDB's type smashing to match exactly those required
1717 by the source language. So GDB could have a
1718 "complete_this_type" function, but never create unnecessary
1719 copies of a type otherwise. */
1720 replace_type (type
, xtype
);
1721 type
->set_name (NULL
);
1725 type
->set_target_is_stub (true);
1726 type
->set_target_type (xtype
);
1731 /* In the following types, we must be sure to overwrite any existing
1732 type that the typenums refer to, rather than allocating a new one
1733 and making the typenums point to the new one. This is because there
1734 may already be pointers to the existing type (if it had been
1735 forward-referenced), and we must change it to a pointer, function,
1736 reference, or whatever, *in-place*. */
1738 case '*': /* Pointer to another type */
1739 type1
= read_type (pp
, objfile
);
1740 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
, objfile
));
1743 case '&': /* Reference to another type */
1744 type1
= read_type (pp
, objfile
);
1745 type
= make_reference_type (type1
, dbx_lookup_type (typenums
, objfile
),
1749 case 'f': /* Function returning another type */
1750 type1
= read_type (pp
, objfile
);
1751 type
= make_function_type (type1
, dbx_lookup_type (typenums
, objfile
));
1754 case 'g': /* Prototyped function. (Sun) */
1756 /* Unresolved questions:
1758 - According to Sun's ``STABS Interface Manual'', for 'f'
1759 and 'F' symbol descriptors, a `0' in the argument type list
1760 indicates a varargs function. But it doesn't say how 'g'
1761 type descriptors represent that info. Someone with access
1762 to Sun's toolchain should try it out.
1764 - According to the comment in define_symbol (search for
1765 `process_prototype_types:'), Sun emits integer arguments as
1766 types which ref themselves --- like `void' types. Do we
1767 have to deal with that here, too? Again, someone with
1768 access to Sun's toolchain should try it out and let us
1771 const char *type_start
= (*pp
) - 1;
1772 struct type
*return_type
= read_type (pp
, objfile
);
1773 struct type
*func_type
1774 = make_function_type (return_type
,
1775 dbx_lookup_type (typenums
, objfile
));
1778 struct type_list
*next
;
1782 while (**pp
&& **pp
!= '#')
1784 struct type
*arg_type
= read_type (pp
, objfile
);
1785 struct type_list
*newobj
= XALLOCA (struct type_list
);
1786 newobj
->type
= arg_type
;
1787 newobj
->next
= arg_types
;
1795 complaint (_("Prototyped function type didn't "
1796 "end arguments with `#':\n%s"),
1800 /* If there is just one argument whose type is `void', then
1801 that's just an empty argument list. */
1803 && ! arg_types
->next
1804 && arg_types
->type
->code () == TYPE_CODE_VOID
)
1807 func_type
->set_fields
1808 ((struct field
*) TYPE_ALLOC (func_type
,
1809 num_args
* sizeof (struct field
)));
1810 memset (func_type
->fields (), 0, num_args
* sizeof (struct field
));
1813 struct type_list
*t
;
1815 /* We stuck each argument type onto the front of the list
1816 when we read it, so the list is reversed. Build the
1817 fields array right-to-left. */
1818 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1819 func_type
->field (i
).set_type (t
->type
);
1821 func_type
->set_num_fields (num_args
);
1822 func_type
->set_is_prototyped (true);
1828 case 'k': /* Const qualifier on some type (Sun) */
1829 type
= read_type (pp
, objfile
);
1830 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1831 dbx_lookup_type (typenums
, objfile
));
1834 case 'B': /* Volatile qual on some type (Sun) */
1835 type
= read_type (pp
, objfile
);
1836 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1837 dbx_lookup_type (typenums
, objfile
));
1841 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1842 { /* Member (class & variable) type */
1843 /* FIXME -- we should be doing smash_to_XXX types here. */
1845 struct type
*domain
= read_type (pp
, objfile
);
1846 struct type
*memtype
;
1849 /* Invalid member type data format. */
1850 return error_type (pp
, objfile
);
1853 memtype
= read_type (pp
, objfile
);
1854 type
= dbx_alloc_type (typenums
, objfile
);
1855 smash_to_memberptr_type (type
, domain
, memtype
);
1858 /* type attribute */
1860 const char *attr
= *pp
;
1862 /* Skip to the semicolon. */
1863 while (**pp
!= ';' && **pp
!= '\0')
1866 return error_type (pp
, objfile
);
1868 ++ * pp
; /* Skip the semicolon. */
1872 case 's': /* Size attribute */
1873 type_size
= atoi (attr
+ 1);
1878 case 'S': /* String attribute */
1879 /* FIXME: check to see if following type is array? */
1883 case 'V': /* Vector attribute */
1884 /* FIXME: check to see if following type is array? */
1889 /* Ignore unrecognized type attributes, so future compilers
1890 can invent new ones. */
1898 case '#': /* Method (class & fn) type */
1899 if ((*pp
)[0] == '#')
1901 /* We'll get the parameter types from the name. */
1902 struct type
*return_type
;
1905 return_type
= read_type (pp
, objfile
);
1906 if (*(*pp
)++ != ';')
1907 complaint (_("invalid (minimal) member type "
1908 "data format at symtab pos %d."),
1910 type
= allocate_stub_method (return_type
);
1911 if (typenums
[0] != -1)
1912 *dbx_lookup_type (typenums
, objfile
) = type
;
1916 struct type
*domain
= read_type (pp
, objfile
);
1917 struct type
*return_type
;
1922 /* Invalid member type data format. */
1923 return error_type (pp
, objfile
);
1927 return_type
= read_type (pp
, objfile
);
1928 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1930 return error_type (pp
, objfile
);
1931 type
= dbx_alloc_type (typenums
, objfile
);
1932 smash_to_method_type (type
, domain
, return_type
, args
,
1937 case 'r': /* Range type */
1938 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1939 if (typenums
[0] != -1)
1940 *dbx_lookup_type (typenums
, objfile
) = type
;
1945 /* Sun ACC builtin int type */
1946 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1947 if (typenums
[0] != -1)
1948 *dbx_lookup_type (typenums
, objfile
) = type
;
1952 case 'R': /* Sun ACC builtin float type */
1953 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1954 if (typenums
[0] != -1)
1955 *dbx_lookup_type (typenums
, objfile
) = type
;
1958 case 'e': /* Enumeration type */
1959 type
= dbx_alloc_type (typenums
, objfile
);
1960 type
= read_enum_type (pp
, type
, objfile
);
1961 if (typenums
[0] != -1)
1962 *dbx_lookup_type (typenums
, objfile
) = type
;
1965 case 's': /* Struct type */
1966 case 'u': /* Union type */
1968 enum type_code type_code
= TYPE_CODE_UNDEF
;
1969 type
= dbx_alloc_type (typenums
, objfile
);
1970 switch (type_descriptor
)
1973 type_code
= TYPE_CODE_STRUCT
;
1976 type_code
= TYPE_CODE_UNION
;
1979 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1983 case 'a': /* Array type */
1985 return error_type (pp
, objfile
);
1988 type
= dbx_alloc_type (typenums
, objfile
);
1989 type
= read_array_type (pp
, type
, objfile
);
1991 type
->set_code (TYPE_CODE_STRING
);
1993 make_vector_type (type
);
1996 case 'S': /* Set type */
1997 type1
= read_type (pp
, objfile
);
1998 type
= create_set_type (NULL
, type1
);
1999 if (typenums
[0] != -1)
2000 *dbx_lookup_type (typenums
, objfile
) = type
;
2004 --*pp
; /* Go back to the symbol in error. */
2005 /* Particularly important if it was \0! */
2006 return error_type (pp
, objfile
);
2011 warning (_("GDB internal error, type is NULL in stabsread.c."));
2012 return error_type (pp
, objfile
);
2015 /* Size specified in a type attribute overrides any other size. */
2016 if (type_size
!= -1)
2017 type
->set_length ((type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
);
2022 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2023 Return the proper type node for a given builtin type number. */
2025 static const registry
<objfile
>::key
<struct type
*,
2026 gdb::noop_deleter
<struct type
*>>
2027 rs6000_builtin_type_data
;
2029 static struct type
*
2030 rs6000_builtin_type (int typenum
, struct objfile
*objfile
)
2032 struct type
**negative_types
= rs6000_builtin_type_data
.get (objfile
);
2034 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2035 #define NUMBER_RECOGNIZED 34
2036 struct type
*rettype
= NULL
;
2038 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
2040 complaint (_("Unknown builtin type %d"), typenum
);
2041 return objfile_type (objfile
)->builtin_error
;
2044 if (!negative_types
)
2046 /* This includes an empty slot for type number -0. */
2047 negative_types
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2048 NUMBER_RECOGNIZED
+ 1, struct type
*);
2049 rs6000_builtin_type_data
.set (objfile
, negative_types
);
2052 if (negative_types
[-typenum
] != NULL
)
2053 return negative_types
[-typenum
];
2055 #if TARGET_CHAR_BIT != 8
2056 #error This code wrong for TARGET_CHAR_BIT not 8
2057 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2058 that if that ever becomes not true, the correct fix will be to
2059 make the size in the struct type to be in bits, not in units of
2066 /* The size of this and all the other types are fixed, defined
2067 by the debugging format. If there is a type called "int" which
2068 is other than 32 bits, then it should use a new negative type
2069 number (or avoid negative type numbers for that case).
2070 See stabs.texinfo. */
2071 rettype
= init_integer_type (objfile
, 32, 0, "int");
2074 rettype
= init_integer_type (objfile
, 8, 0, "char");
2075 rettype
->set_has_no_signedness (true);
2078 rettype
= init_integer_type (objfile
, 16, 0, "short");
2081 rettype
= init_integer_type (objfile
, 32, 0, "long");
2084 rettype
= init_integer_type (objfile
, 8, 1, "unsigned char");
2087 rettype
= init_integer_type (objfile
, 8, 0, "signed char");
2090 rettype
= init_integer_type (objfile
, 16, 1, "unsigned short");
2093 rettype
= init_integer_type (objfile
, 32, 1, "unsigned int");
2096 rettype
= init_integer_type (objfile
, 32, 1, "unsigned");
2099 rettype
= init_integer_type (objfile
, 32, 1, "unsigned long");
2102 rettype
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
2105 /* IEEE single precision (32 bit). */
2106 rettype
= init_float_type (objfile
, 32, "float",
2107 floatformats_ieee_single
);
2110 /* IEEE double precision (64 bit). */
2111 rettype
= init_float_type (objfile
, 64, "double",
2112 floatformats_ieee_double
);
2115 /* This is an IEEE double on the RS/6000, and different machines with
2116 different sizes for "long double" should use different negative
2117 type numbers. See stabs.texinfo. */
2118 rettype
= init_float_type (objfile
, 64, "long double",
2119 floatformats_ieee_double
);
2122 rettype
= init_integer_type (objfile
, 32, 0, "integer");
2125 rettype
= init_boolean_type (objfile
, 32, 1, "boolean");
2128 rettype
= init_float_type (objfile
, 32, "short real",
2129 floatformats_ieee_single
);
2132 rettype
= init_float_type (objfile
, 64, "real",
2133 floatformats_ieee_double
);
2136 rettype
= init_type (objfile
, TYPE_CODE_ERROR
, 0, "stringptr");
2139 rettype
= init_character_type (objfile
, 8, 1, "character");
2142 rettype
= init_boolean_type (objfile
, 8, 1, "logical*1");
2145 rettype
= init_boolean_type (objfile
, 16, 1, "logical*2");
2148 rettype
= init_boolean_type (objfile
, 32, 1, "logical*4");
2151 rettype
= init_boolean_type (objfile
, 32, 1, "logical");
2154 /* Complex type consisting of two IEEE single precision values. */
2155 rettype
= init_complex_type ("complex",
2156 rs6000_builtin_type (12, objfile
));
2159 /* Complex type consisting of two IEEE double precision values. */
2160 rettype
= init_complex_type ("double complex",
2161 rs6000_builtin_type (13, objfile
));
2164 rettype
= init_integer_type (objfile
, 8, 0, "integer*1");
2167 rettype
= init_integer_type (objfile
, 16, 0, "integer*2");
2170 rettype
= init_integer_type (objfile
, 32, 0, "integer*4");
2173 rettype
= init_character_type (objfile
, 16, 0, "wchar");
2176 rettype
= init_integer_type (objfile
, 64, 0, "long long");
2179 rettype
= init_integer_type (objfile
, 64, 1, "unsigned long long");
2182 rettype
= init_integer_type (objfile
, 64, 1, "logical*8");
2185 rettype
= init_integer_type (objfile
, 64, 0, "integer*8");
2188 negative_types
[-typenum
] = rettype
;
2192 /* This page contains subroutines of read_type. */
2194 /* Wrapper around method_name_from_physname to flag a complaint
2195 if there is an error. */
2198 stabs_method_name_from_physname (const char *physname
)
2202 method_name
= method_name_from_physname (physname
);
2204 if (method_name
== NULL
)
2206 complaint (_("Method has bad physname %s\n"), physname
);
2213 /* Read member function stabs info for C++ classes. The form of each member
2216 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2218 An example with two member functions is:
2220 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2222 For the case of overloaded operators, the format is op$::*.funcs, where
2223 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2224 name (such as `+=') and `.' marks the end of the operator name.
2226 Returns 1 for success, 0 for failure. */
2229 read_member_functions (struct stab_field_info
*fip
, const char **pp
,
2230 struct type
*type
, struct objfile
*objfile
)
2237 struct next_fnfield
*next
;
2238 struct fn_field fn_field
;
2241 struct type
*look_ahead_type
;
2242 struct next_fnfieldlist
*new_fnlist
;
2243 struct next_fnfield
*new_sublist
;
2247 /* Process each list until we find something that is not a member function
2248 or find the end of the functions. */
2252 /* We should be positioned at the start of the function name.
2253 Scan forward to find the first ':' and if it is not the
2254 first of a "::" delimiter, then this is not a member function. */
2266 look_ahead_type
= NULL
;
2269 new_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfieldlist
);
2271 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2273 /* This is a completely wierd case. In order to stuff in the
2274 names that might contain colons (the usual name delimiter),
2275 Mike Tiemann defined a different name format which is
2276 signalled if the identifier is "op$". In that case, the
2277 format is "op$::XXXX." where XXXX is the name. This is
2278 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2279 /* This lets the user type "break operator+".
2280 We could just put in "+" as the name, but that wouldn't
2282 static char opname
[32] = "op$";
2283 char *o
= opname
+ 3;
2285 /* Skip past '::'. */
2288 STABS_CONTINUE (pp
, objfile
);
2294 main_fn_name
= savestring (opname
, o
- opname
);
2300 main_fn_name
= savestring (*pp
, p
- *pp
);
2301 /* Skip past '::'. */
2304 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2308 new_sublist
= OBSTACK_ZALLOC (&fip
->obstack
, struct next_fnfield
);
2310 /* Check for and handle cretinous dbx symbol name continuation! */
2311 if (look_ahead_type
== NULL
)
2314 STABS_CONTINUE (pp
, objfile
);
2316 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2319 /* Invalid symtab info for member function. */
2325 /* g++ version 1 kludge */
2326 new_sublist
->fn_field
.type
= look_ahead_type
;
2327 look_ahead_type
= NULL
;
2337 /* These are methods, not functions. */
2338 if (new_sublist
->fn_field
.type
->code () == TYPE_CODE_FUNC
)
2339 new_sublist
->fn_field
.type
->set_code (TYPE_CODE_METHOD
);
2341 /* If this is just a stub, then we don't have the real name here. */
2342 if (new_sublist
->fn_field
.type
->is_stub ())
2344 if (!TYPE_SELF_TYPE (new_sublist
->fn_field
.type
))
2345 set_type_self_type (new_sublist
->fn_field
.type
, type
);
2346 new_sublist
->fn_field
.is_stub
= 1;
2349 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2352 /* Set this member function's visibility fields. */
2355 case VISIBILITY_PRIVATE
:
2356 new_sublist
->fn_field
.is_private
= 1;
2358 case VISIBILITY_PROTECTED
:
2359 new_sublist
->fn_field
.is_protected
= 1;
2363 STABS_CONTINUE (pp
, objfile
);
2366 case 'A': /* Normal functions. */
2367 new_sublist
->fn_field
.is_const
= 0;
2368 new_sublist
->fn_field
.is_volatile
= 0;
2371 case 'B': /* `const' member functions. */
2372 new_sublist
->fn_field
.is_const
= 1;
2373 new_sublist
->fn_field
.is_volatile
= 0;
2376 case 'C': /* `volatile' member function. */
2377 new_sublist
->fn_field
.is_const
= 0;
2378 new_sublist
->fn_field
.is_volatile
= 1;
2381 case 'D': /* `const volatile' member function. */
2382 new_sublist
->fn_field
.is_const
= 1;
2383 new_sublist
->fn_field
.is_volatile
= 1;
2386 case '*': /* File compiled with g++ version 1 --
2392 complaint (_("const/volatile indicator missing, got '%c'"),
2402 /* virtual member function, followed by index.
2403 The sign bit is set to distinguish pointers-to-methods
2404 from virtual function indicies. Since the array is
2405 in words, the quantity must be shifted left by 1
2406 on 16 bit machine, and by 2 on 32 bit machine, forcing
2407 the sign bit out, and usable as a valid index into
2408 the array. Remove the sign bit here. */
2409 new_sublist
->fn_field
.voffset
=
2410 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2414 STABS_CONTINUE (pp
, objfile
);
2415 if (**pp
== ';' || **pp
== '\0')
2417 /* Must be g++ version 1. */
2418 new_sublist
->fn_field
.fcontext
= 0;
2422 /* Figure out from whence this virtual function came.
2423 It may belong to virtual function table of
2424 one of its baseclasses. */
2425 look_ahead_type
= read_type (pp
, objfile
);
2428 /* g++ version 1 overloaded methods. */
2432 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2441 look_ahead_type
= NULL
;
2447 /* static member function. */
2449 int slen
= strlen (main_fn_name
);
2451 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2453 /* For static member functions, we can't tell if they
2454 are stubbed, as they are put out as functions, and not as
2456 GCC v2 emits the fully mangled name if
2457 dbxout.c:flag_minimal_debug is not set, so we have to
2458 detect a fully mangled physname here and set is_stub
2459 accordingly. Fully mangled physnames in v2 start with
2460 the member function name, followed by two underscores.
2461 GCC v3 currently always emits stubbed member functions,
2462 but with fully mangled physnames, which start with _Z. */
2463 if (!(strncmp (new_sublist
->fn_field
.physname
,
2464 main_fn_name
, slen
) == 0
2465 && new_sublist
->fn_field
.physname
[slen
] == '_'
2466 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2468 new_sublist
->fn_field
.is_stub
= 1;
2475 complaint (_("member function type missing, got '%c'"),
2477 /* Normal member function. */
2481 /* normal member function. */
2482 new_sublist
->fn_field
.voffset
= 0;
2483 new_sublist
->fn_field
.fcontext
= 0;
2487 new_sublist
->next
= sublist
;
2488 sublist
= new_sublist
;
2490 STABS_CONTINUE (pp
, objfile
);
2492 while (**pp
!= ';' && **pp
!= '\0');
2495 STABS_CONTINUE (pp
, objfile
);
2497 /* Skip GCC 3.X member functions which are duplicates of the callable
2498 constructor/destructor. */
2499 if (strcmp_iw (main_fn_name
, "__base_ctor ") == 0
2500 || strcmp_iw (main_fn_name
, "__base_dtor ") == 0
2501 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2503 xfree (main_fn_name
);
2507 int has_destructor
= 0, has_other
= 0;
2509 struct next_fnfield
*tmp_sublist
;
2511 /* Various versions of GCC emit various mostly-useless
2512 strings in the name field for special member functions.
2514 For stub methods, we need to defer correcting the name
2515 until we are ready to unstub the method, because the current
2516 name string is used by gdb_mangle_name. The only stub methods
2517 of concern here are GNU v2 operators; other methods have their
2518 names correct (see caveat below).
2520 For non-stub methods, in GNU v3, we have a complete physname.
2521 Therefore we can safely correct the name now. This primarily
2522 affects constructors and destructors, whose name will be
2523 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2524 operators will also have incorrect names; for instance,
2525 "operator int" will be named "operator i" (i.e. the type is
2528 For non-stub methods in GNU v2, we have no easy way to
2529 know if we have a complete physname or not. For most
2530 methods the result depends on the platform (if CPLUS_MARKER
2531 can be `$' or `.', it will use minimal debug information, or
2532 otherwise the full physname will be included).
2534 Rather than dealing with this, we take a different approach.
2535 For v3 mangled names, we can use the full physname; for v2,
2536 we use cplus_demangle_opname (which is actually v2 specific),
2537 because the only interesting names are all operators - once again
2538 barring the caveat below. Skip this process if any method in the
2539 group is a stub, to prevent our fouling up the workings of
2542 The caveat: GCC 2.95.x (and earlier?) put constructors and
2543 destructors in the same method group. We need to split this
2544 into two groups, because they should have different names.
2545 So for each method group we check whether it contains both
2546 routines whose physname appears to be a destructor (the physnames
2547 for and destructors are always provided, due to quirks in v2
2548 mangling) and routines whose physname does not appear to be a
2549 destructor. If so then we break up the list into two halves.
2550 Even if the constructors and destructors aren't in the same group
2551 the destructor will still lack the leading tilde, so that also
2554 So, to summarize what we expect and handle here:
2556 Given Given Real Real Action
2557 method name physname physname method name
2559 __opi [none] __opi__3Foo operator int opname
2561 Foo _._3Foo _._3Foo ~Foo separate and
2563 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2564 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2567 tmp_sublist
= sublist
;
2568 while (tmp_sublist
!= NULL
)
2570 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2571 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2574 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2579 tmp_sublist
= tmp_sublist
->next
;
2582 if (has_destructor
&& has_other
)
2584 struct next_fnfieldlist
*destr_fnlist
;
2585 struct next_fnfield
*last_sublist
;
2587 /* Create a new fn_fieldlist for the destructors. */
2589 destr_fnlist
= OBSTACK_ZALLOC (&fip
->obstack
,
2590 struct next_fnfieldlist
);
2592 destr_fnlist
->fn_fieldlist
.name
2593 = obconcat (&objfile
->objfile_obstack
, "~",
2594 new_fnlist
->fn_fieldlist
.name
, (char *) NULL
);
2596 destr_fnlist
->fn_fieldlist
.fn_fields
=
2597 XOBNEWVEC (&objfile
->objfile_obstack
,
2598 struct fn_field
, has_destructor
);
2599 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2600 sizeof (struct fn_field
) * has_destructor
);
2601 tmp_sublist
= sublist
;
2602 last_sublist
= NULL
;
2604 while (tmp_sublist
!= NULL
)
2606 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2608 tmp_sublist
= tmp_sublist
->next
;
2612 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2613 = tmp_sublist
->fn_field
;
2615 last_sublist
->next
= tmp_sublist
->next
;
2617 sublist
= tmp_sublist
->next
;
2618 last_sublist
= tmp_sublist
;
2619 tmp_sublist
= tmp_sublist
->next
;
2622 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2623 destr_fnlist
->next
= fip
->fnlist
;
2624 fip
->fnlist
= destr_fnlist
;
2626 length
-= has_destructor
;
2630 /* v3 mangling prevents the use of abbreviated physnames,
2631 so we can do this here. There are stubbed methods in v3
2633 - in -gstabs instead of -gstabs+
2634 - or for static methods, which are output as a function type
2635 instead of a method type. */
2636 char *new_method_name
=
2637 stabs_method_name_from_physname (sublist
->fn_field
.physname
);
2639 if (new_method_name
!= NULL
2640 && strcmp (new_method_name
,
2641 new_fnlist
->fn_fieldlist
.name
) != 0)
2643 new_fnlist
->fn_fieldlist
.name
= new_method_name
;
2644 xfree (main_fn_name
);
2647 xfree (new_method_name
);
2649 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2651 new_fnlist
->fn_fieldlist
.name
=
2652 obconcat (&objfile
->objfile_obstack
,
2653 "~", main_fn_name
, (char *)NULL
);
2654 xfree (main_fn_name
);
2657 new_fnlist
->fn_fieldlist
.fn_fields
2658 = OBSTACK_CALLOC (&objfile
->objfile_obstack
, length
, fn_field
);
2659 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2661 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2664 new_fnlist
->fn_fieldlist
.length
= length
;
2665 new_fnlist
->next
= fip
->fnlist
;
2666 fip
->fnlist
= new_fnlist
;
2673 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2674 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2675 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2676 memset (TYPE_FN_FIELDLISTS (type
), 0,
2677 sizeof (struct fn_fieldlist
) * nfn_fields
);
2678 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2684 /* Special GNU C++ name.
2686 Returns 1 for success, 0 for failure. "failure" means that we can't
2687 keep parsing and it's time for error_type(). */
2690 read_cpp_abbrev (struct stab_field_info
*fip
, const char **pp
,
2691 struct type
*type
, struct objfile
*objfile
)
2696 struct type
*context
;
2706 /* At this point, *pp points to something like "22:23=*22...",
2707 where the type number before the ':' is the "context" and
2708 everything after is a regular type definition. Lookup the
2709 type, find it's name, and construct the field name. */
2711 context
= read_type (pp
, objfile
);
2715 case 'f': /* $vf -- a virtual function table pointer */
2716 name
= context
->name ();
2721 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2722 vptr_name
, name
, (char *) NULL
));
2725 case 'b': /* $vb -- a virtual bsomethingorother */
2726 name
= context
->name ();
2729 complaint (_("C++ abbreviated type name "
2730 "unknown at symtab pos %d"),
2734 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2735 vb_name
, name
, (char *) NULL
));
2739 invalid_cpp_abbrev_complaint (*pp
);
2740 fip
->list
->field
.set_name (obconcat (&objfile
->objfile_obstack
,
2741 "INVALID_CPLUSPLUS_ABBREV",
2746 /* At this point, *pp points to the ':'. Skip it and read the
2752 invalid_cpp_abbrev_complaint (*pp
);
2755 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2757 (*pp
)++; /* Skip the comma. */
2764 fip
->list
->field
.set_loc_bitpos (read_huge_number (pp
, ';', &nbits
, 0));
2768 /* This field is unpacked. */
2769 FIELD_BITSIZE (fip
->list
->field
) = 0;
2770 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2774 invalid_cpp_abbrev_complaint (*pp
);
2775 /* We have no idea what syntax an unrecognized abbrev would have, so
2776 better return 0. If we returned 1, we would need to at least advance
2777 *pp to avoid an infinite loop. */
2784 read_one_struct_field (struct stab_field_info
*fip
, const char **pp
,
2785 const char *p
, struct type
*type
,
2786 struct objfile
*objfile
)
2788 struct gdbarch
*gdbarch
= objfile
->arch ();
2790 fip
->list
->field
.set_name
2791 (obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
));
2794 /* This means we have a visibility for a field coming. */
2798 fip
->list
->visibility
= *(*pp
)++;
2802 /* normal dbx-style format, no explicit visibility */
2803 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2806 fip
->list
->field
.set_type (read_type (pp
, objfile
));
2811 /* Possible future hook for nested types. */
2814 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2824 /* Static class member. */
2825 fip
->list
->field
.set_loc_physname (savestring (*pp
, p
- *pp
));
2829 else if (**pp
!= ',')
2831 /* Bad structure-type format. */
2832 stabs_general_complaint ("bad structure-type format");
2836 (*pp
)++; /* Skip the comma. */
2841 fip
->list
->field
.set_loc_bitpos (read_huge_number (pp
, ',', &nbits
, 0));
2844 stabs_general_complaint ("bad structure-type format");
2847 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2850 stabs_general_complaint ("bad structure-type format");
2855 if (fip
->list
->field
.loc_bitpos () == 0
2856 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2858 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2859 it is a field which has been optimized out. The correct stab for
2860 this case is to use VISIBILITY_IGNORE, but that is a recent
2861 invention. (2) It is a 0-size array. For example
2862 union { int num; char str[0]; } foo. Printing _("<no value>" for
2863 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2864 will continue to work, and a 0-size array as a whole doesn't
2865 have any contents to print.
2867 I suspect this probably could also happen with gcc -gstabs (not
2868 -gstabs+) for static fields, and perhaps other C++ extensions.
2869 Hopefully few people use -gstabs with gdb, since it is intended
2870 for dbx compatibility. */
2872 /* Ignore this field. */
2873 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2877 /* Detect an unpacked field and mark it as such.
2878 dbx gives a bit size for all fields.
2879 Note that forward refs cannot be packed,
2880 and treat enums as if they had the width of ints. */
2882 struct type
*field_type
= check_typedef (fip
->list
->field
.type ());
2884 if (field_type
->code () != TYPE_CODE_INT
2885 && field_type
->code () != TYPE_CODE_RANGE
2886 && field_type
->code () != TYPE_CODE_BOOL
2887 && field_type
->code () != TYPE_CODE_ENUM
)
2889 FIELD_BITSIZE (fip
->list
->field
) = 0;
2891 if ((FIELD_BITSIZE (fip
->list
->field
)
2892 == TARGET_CHAR_BIT
* field_type
->length ()
2893 || (field_type
->code () == TYPE_CODE_ENUM
2894 && FIELD_BITSIZE (fip
->list
->field
)
2895 == gdbarch_int_bit (gdbarch
))
2898 fip
->list
->field
.loc_bitpos () % 8 == 0)
2900 FIELD_BITSIZE (fip
->list
->field
) = 0;
2906 /* Read struct or class data fields. They have the form:
2908 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2910 At the end, we see a semicolon instead of a field.
2912 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2915 The optional VISIBILITY is one of:
2917 '/0' (VISIBILITY_PRIVATE)
2918 '/1' (VISIBILITY_PROTECTED)
2919 '/2' (VISIBILITY_PUBLIC)
2920 '/9' (VISIBILITY_IGNORE)
2922 or nothing, for C style fields with public visibility.
2924 Returns 1 for success, 0 for failure. */
2927 read_struct_fields (struct stab_field_info
*fip
, const char **pp
,
2928 struct type
*type
, struct objfile
*objfile
)
2931 struct stabs_nextfield
*newobj
;
2933 /* We better set p right now, in case there are no fields at all... */
2937 /* Read each data member type until we find the terminating ';' at the end of
2938 the data member list, or break for some other reason such as finding the
2939 start of the member function list. */
2940 /* Stab string for structure/union does not end with two ';' in
2941 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2943 while (**pp
!= ';' && **pp
!= '\0')
2945 STABS_CONTINUE (pp
, objfile
);
2946 /* Get space to record the next field's data. */
2947 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct stabs_nextfield
);
2949 newobj
->next
= fip
->list
;
2952 /* Get the field name. */
2955 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2956 unless the CPLUS_MARKER is followed by an underscore, in
2957 which case it is just the name of an anonymous type, which we
2958 should handle like any other type name. */
2960 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2962 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2967 /* Look for the ':' that separates the field name from the field
2968 values. Data members are delimited by a single ':', while member
2969 functions are delimited by a pair of ':'s. When we hit the member
2970 functions (if any), terminate scan loop and return. */
2972 while (*p
!= ':' && *p
!= '\0')
2979 /* Check to see if we have hit the member functions yet. */
2984 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2986 if (p
[0] == ':' && p
[1] == ':')
2988 /* (the deleted) chill the list of fields: the last entry (at
2989 the head) is a partially constructed entry which we now
2991 fip
->list
= fip
->list
->next
;
2996 /* The stabs for C++ derived classes contain baseclass information which
2997 is marked by a '!' character after the total size. This function is
2998 called when we encounter the baseclass marker, and slurps up all the
2999 baseclass information.
3001 Immediately following the '!' marker is the number of base classes that
3002 the class is derived from, followed by information for each base class.
3003 For each base class, there are two visibility specifiers, a bit offset
3004 to the base class information within the derived class, a reference to
3005 the type for the base class, and a terminating semicolon.
3007 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3009 Baseclass information marker __________________|| | | | | | |
3010 Number of baseclasses __________________________| | | | | | |
3011 Visibility specifiers (2) ________________________| | | | | |
3012 Offset in bits from start of class _________________| | | | |
3013 Type number for base class ___________________________| | | |
3014 Visibility specifiers (2) _______________________________| | |
3015 Offset in bits from start of class ________________________| |
3016 Type number of base class ____________________________________|
3018 Return 1 for success, 0 for (error-type-inducing) failure. */
3024 read_baseclasses (struct stab_field_info
*fip
, const char **pp
,
3025 struct type
*type
, struct objfile
*objfile
)
3028 struct stabs_nextfield
*newobj
;
3036 /* Skip the '!' baseclass information marker. */
3040 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3044 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
3050 /* Some stupid compilers have trouble with the following, so break
3051 it up into simpler expressions. */
3052 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3053 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3056 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3059 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3060 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3064 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3066 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3068 newobj
= OBSTACK_ZALLOC (&fip
->obstack
, struct stabs_nextfield
);
3070 newobj
->next
= fip
->list
;
3072 FIELD_BITSIZE (newobj
->field
) = 0; /* This should be an unpacked
3075 STABS_CONTINUE (pp
, objfile
);
3079 /* Nothing to do. */
3082 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3085 /* Unknown character. Complain and treat it as non-virtual. */
3087 complaint (_("Unknown virtual character `%c' for baseclass"),
3093 newobj
->visibility
= *(*pp
)++;
3094 switch (newobj
->visibility
)
3096 case VISIBILITY_PRIVATE
:
3097 case VISIBILITY_PROTECTED
:
3098 case VISIBILITY_PUBLIC
:
3101 /* Bad visibility format. Complain and treat it as
3104 complaint (_("Unknown visibility `%c' for baseclass"),
3105 newobj
->visibility
);
3106 newobj
->visibility
= VISIBILITY_PUBLIC
;
3113 /* The remaining value is the bit offset of the portion of the object
3114 corresponding to this baseclass. Always zero in the absence of
3115 multiple inheritance. */
3117 newobj
->field
.set_loc_bitpos (read_huge_number (pp
, ',', &nbits
, 0));
3122 /* The last piece of baseclass information is the type of the
3123 base class. Read it, and remember it's type name as this
3126 newobj
->field
.set_type (read_type (pp
, objfile
));
3127 newobj
->field
.set_name (newobj
->field
.type ()->name ());
3129 /* Skip trailing ';' and bump count of number of fields seen. */
3138 /* The tail end of stabs for C++ classes that contain a virtual function
3139 pointer contains a tilde, a %, and a type number.
3140 The type number refers to the base class (possibly this class itself) which
3141 contains the vtable pointer for the current class.
3143 This function is called when we have parsed all the method declarations,
3144 so we can look for the vptr base class info. */
3147 read_tilde_fields (struct stab_field_info
*fip
, const char **pp
,
3148 struct type
*type
, struct objfile
*objfile
)
3152 STABS_CONTINUE (pp
, objfile
);
3154 /* If we are positioned at a ';', then skip it. */
3164 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3166 /* Obsolete flags that used to indicate the presence
3167 of constructors and/or destructors. */
3171 /* Read either a '%' or the final ';'. */
3172 if (*(*pp
)++ == '%')
3174 /* The next number is the type number of the base class
3175 (possibly our own class) which supplies the vtable for
3176 this class. Parse it out, and search that class to find
3177 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3178 and TYPE_VPTR_FIELDNO. */
3183 t
= read_type (pp
, objfile
);
3185 while (*p
!= '\0' && *p
!= ';')
3191 /* Premature end of symbol. */
3195 set_type_vptr_basetype (type
, t
);
3196 if (type
== t
) /* Our own class provides vtbl ptr. */
3198 for (i
= t
->num_fields () - 1;
3199 i
>= TYPE_N_BASECLASSES (t
);
3202 const char *name
= t
->field (i
).name ();
3204 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3205 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3207 set_type_vptr_fieldno (type
, i
);
3211 /* Virtual function table field not found. */
3212 complaint (_("virtual function table pointer "
3213 "not found when defining class `%s'"),
3219 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
3230 attach_fn_fields_to_type (struct stab_field_info
*fip
, struct type
*type
)
3234 for (n
= TYPE_NFN_FIELDS (type
);
3235 fip
->fnlist
!= NULL
;
3236 fip
->fnlist
= fip
->fnlist
->next
)
3238 --n
; /* Circumvent Sun3 compiler bug. */
3239 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3244 /* Create the vector of fields, and record how big it is.
3245 We need this info to record proper virtual function table information
3246 for this class's virtual functions. */
3249 attach_fields_to_type (struct stab_field_info
*fip
, struct type
*type
,
3250 struct objfile
*objfile
)
3253 int non_public_fields
= 0;
3254 struct stabs_nextfield
*scan
;
3256 /* Count up the number of fields that we have, as well as taking note of
3257 whether or not there are any non-public fields, which requires us to
3258 allocate and build the private_field_bits and protected_field_bits
3261 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3264 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3266 non_public_fields
++;
3270 /* Now we know how many fields there are, and whether or not there are any
3271 non-public fields. Record the field count, allocate space for the
3272 array of fields, and create blank visibility bitfields if necessary. */
3274 type
->set_num_fields (nfields
);
3277 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
));
3278 memset (type
->fields (), 0, sizeof (struct field
) * nfields
);
3280 if (non_public_fields
)
3282 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3284 TYPE_FIELD_PRIVATE_BITS (type
) =
3285 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3286 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3288 TYPE_FIELD_PROTECTED_BITS (type
) =
3289 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3290 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3292 TYPE_FIELD_IGNORE_BITS (type
) =
3293 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3294 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3297 /* Copy the saved-up fields into the field vector. Start from the
3298 head of the list, adding to the tail of the field array, so that
3299 they end up in the same order in the array in which they were
3300 added to the list. */
3302 while (nfields
-- > 0)
3304 type
->field (nfields
) = fip
->list
->field
;
3305 switch (fip
->list
->visibility
)
3307 case VISIBILITY_PRIVATE
:
3308 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3311 case VISIBILITY_PROTECTED
:
3312 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3315 case VISIBILITY_IGNORE
:
3316 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3319 case VISIBILITY_PUBLIC
:
3323 /* Unknown visibility. Complain and treat it as public. */
3325 complaint (_("Unknown visibility `%c' for field"),
3326 fip
->list
->visibility
);
3330 fip
->list
= fip
->list
->next
;
3336 /* Complain that the compiler has emitted more than one definition for the
3337 structure type TYPE. */
3339 complain_about_struct_wipeout (struct type
*type
)
3341 const char *name
= "";
3342 const char *kind
= "";
3346 name
= type
->name ();
3347 switch (type
->code ())
3349 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3350 case TYPE_CODE_UNION
: kind
= "union "; break;
3351 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3361 complaint (_("struct/union type gets multiply defined: %s%s"), kind
, name
);
3364 /* Set the length for all variants of a same main_type, which are
3365 connected in the closed chain.
3367 This is something that needs to be done when a type is defined *after*
3368 some cross references to this type have already been read. Consider
3369 for instance the following scenario where we have the following two
3372 .stabs "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
3373 .stabs "dummy:T(0,23)=s16x:(0,1),0,3[...]"
3375 A stubbed version of type dummy is created while processing the first
3376 stabs entry. The length of that type is initially set to zero, since
3377 it is unknown at this point. Also, a "constant" variation of type
3378 "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
3381 The second stabs entry allows us to replace the stubbed definition
3382 with the real definition. However, we still need to adjust the length
3383 of the "constant" variation of that type, as its length was left
3384 untouched during the main type replacement... */
3387 set_length_in_type_chain (struct type
*type
)
3389 struct type
*ntype
= TYPE_CHAIN (type
);
3391 while (ntype
!= type
)
3393 if (ntype
->length () == 0)
3394 ntype
->set_length (type
->length ());
3396 complain_about_struct_wipeout (ntype
);
3397 ntype
= TYPE_CHAIN (ntype
);
3401 /* Read the description of a structure (or union type) and return an object
3402 describing the type.
3404 PP points to a character pointer that points to the next unconsumed token
3405 in the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3406 *PP will point to "4a:1,0,32;;".
3408 TYPE points to an incomplete type that needs to be filled in.
3410 OBJFILE points to the current objfile from which the stabs information is
3411 being read. (Note that it is redundant in that TYPE also contains a pointer
3412 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3415 static struct type
*
3416 read_struct_type (const char **pp
, struct type
*type
, enum type_code type_code
,
3417 struct objfile
*objfile
)
3419 struct stab_field_info fi
;
3421 /* When describing struct/union/class types in stabs, G++ always drops
3422 all qualifications from the name. So if you've got:
3423 struct A { ... struct B { ... }; ... };
3424 then G++ will emit stabs for `struct A::B' that call it simply
3425 `struct B'. Obviously, if you've got a real top-level definition for
3426 `struct B', or other nested definitions, this is going to cause
3429 Obviously, GDB can't fix this by itself, but it can at least avoid
3430 scribbling on existing structure type objects when new definitions
3432 if (! (type
->code () == TYPE_CODE_UNDEF
3433 || type
->is_stub ()))
3435 complain_about_struct_wipeout (type
);
3437 /* It's probably best to return the type unchanged. */
3441 INIT_CPLUS_SPECIFIC (type
);
3442 type
->set_code (type_code
);
3443 type
->set_is_stub (false);
3445 /* First comes the total size in bytes. */
3450 type
->set_length (read_huge_number (pp
, 0, &nbits
, 0));
3452 return error_type (pp
, objfile
);
3453 set_length_in_type_chain (type
);
3456 /* Now read the baseclasses, if any, read the regular C struct or C++
3457 class member fields, attach the fields to the type, read the C++
3458 member functions, attach them to the type, and then read any tilde
3459 field (baseclass specifier for the class holding the main vtable). */
3461 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3462 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3463 || !attach_fields_to_type (&fi
, type
, objfile
)
3464 || !read_member_functions (&fi
, pp
, type
, objfile
)
3465 || !attach_fn_fields_to_type (&fi
, type
)
3466 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3468 type
= error_type (pp
, objfile
);
3474 /* Read a definition of an array type,
3475 and create and return a suitable type object.
3476 Also creates a range type which represents the bounds of that
3479 static struct type
*
3480 read_array_type (const char **pp
, struct type
*type
,
3481 struct objfile
*objfile
)
3483 struct type
*index_type
, *element_type
, *range_type
;
3488 /* Format of an array type:
3489 "ar<index type>;lower;upper;<array_contents_type>".
3490 OS9000: "arlower,upper;<array_contents_type>".
3492 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3493 for these, produce a type like float[][]. */
3496 index_type
= read_type (pp
, objfile
);
3498 /* Improper format of array type decl. */
3499 return error_type (pp
, objfile
);
3503 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3508 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3511 return error_type (pp
, objfile
);
3513 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3518 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3520 return error_type (pp
, objfile
);
3522 element_type
= read_type (pp
, objfile
);
3531 create_static_range_type (NULL
, index_type
, lower
, upper
);
3532 type
= create_array_type (type
, element_type
, range_type
);
3538 /* Read a definition of an enumeration type,
3539 and create and return a suitable type object.
3540 Also defines the symbols that represent the values of the type. */
3542 static struct type
*
3543 read_enum_type (const char **pp
, struct type
*type
,
3544 struct objfile
*objfile
)
3546 struct gdbarch
*gdbarch
= objfile
->arch ();
3552 struct pending
**symlist
;
3553 struct pending
*osyms
, *syms
;
3556 int unsigned_enum
= 1;
3559 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3560 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3561 to do? For now, force all enum values to file scope. */
3562 if (within_function
)
3563 symlist
= get_local_symbols ();
3566 symlist
= get_file_symbols ();
3568 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3570 /* The aix4 compiler emits an extra field before the enum members;
3571 my guess is it's a type of some sort. Just ignore it. */
3574 /* Skip over the type. */
3578 /* Skip over the colon. */
3582 /* Read the value-names and their values.
3583 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3584 A semicolon or comma instead of a NAME means the end. */
3585 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3587 STABS_CONTINUE (pp
, objfile
);
3591 name
= obstack_strndup (&objfile
->objfile_obstack
, *pp
, p
- *pp
);
3593 n
= read_huge_number (pp
, ',', &nbits
, 0);
3595 return error_type (pp
, objfile
);
3597 sym
= new (&objfile
->objfile_obstack
) symbol
;
3598 sym
->set_linkage_name (name
);
3599 sym
->set_language (get_current_subfile ()->language
,
3600 &objfile
->objfile_obstack
);
3601 sym
->set_aclass_index (LOC_CONST
);
3602 sym
->set_domain (VAR_DOMAIN
);
3603 sym
->set_value_longest (n
);
3606 add_symbol_to_list (sym
, symlist
);
3611 (*pp
)++; /* Skip the semicolon. */
3613 /* Now fill in the fields of the type-structure. */
3615 type
->set_length (gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
);
3616 set_length_in_type_chain (type
);
3617 type
->set_code (TYPE_CODE_ENUM
);
3618 type
->set_is_stub (false);
3620 type
->set_is_unsigned (true);
3621 type
->set_num_fields (nsyms
);
3624 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
));
3625 memset (type
->fields (), 0, sizeof (struct field
) * nsyms
);
3627 /* Find the symbols for the values and put them into the type.
3628 The symbols can be found in the symlist that we put them on
3629 to cause them to be defined. osyms contains the old value
3630 of that symlist; everything up to there was defined by us. */
3631 /* Note that we preserve the order of the enum constants, so
3632 that in something like "enum {FOO, LAST_THING=FOO}" we print
3633 FOO, not LAST_THING. */
3635 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3637 int last
= syms
== osyms
? o_nsyms
: 0;
3638 int j
= syms
->nsyms
;
3640 for (; --j
>= last
; --n
)
3642 struct symbol
*xsym
= syms
->symbol
[j
];
3644 xsym
->set_type (type
);
3645 type
->field (n
).set_name (xsym
->linkage_name ());
3646 type
->field (n
).set_loc_enumval (xsym
->value_longest ());
3647 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3656 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3657 typedefs in every file (for int, long, etc):
3659 type = b <signed> <width> <format type>; <offset>; <nbits>
3661 optional format type = c or b for char or boolean.
3662 offset = offset from high order bit to start bit of type.
3663 width is # bytes in object of this type, nbits is # bits in type.
3665 The width/offset stuff appears to be for small objects stored in
3666 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3669 static struct type
*
3670 read_sun_builtin_type (const char **pp
, int typenums
[2], struct objfile
*objfile
)
3675 int boolean_type
= 0;
3686 return error_type (pp
, objfile
);
3690 /* For some odd reason, all forms of char put a c here. This is strange
3691 because no other type has this honor. We can safely ignore this because
3692 we actually determine 'char'acterness by the number of bits specified in
3694 Boolean forms, e.g Fortran logical*X, put a b here. */
3698 else if (**pp
== 'b')
3704 /* The first number appears to be the number of bytes occupied
3705 by this type, except that unsigned short is 4 instead of 2.
3706 Since this information is redundant with the third number,
3707 we will ignore it. */
3708 read_huge_number (pp
, ';', &nbits
, 0);
3710 return error_type (pp
, objfile
);
3712 /* The second number is always 0, so ignore it too. */
3713 read_huge_number (pp
, ';', &nbits
, 0);
3715 return error_type (pp
, objfile
);
3717 /* The third number is the number of bits for this type. */
3718 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3720 return error_type (pp
, objfile
);
3721 /* The type *should* end with a semicolon. If it are embedded
3722 in a larger type the semicolon may be the only way to know where
3723 the type ends. If this type is at the end of the stabstring we
3724 can deal with the omitted semicolon (but we don't have to like
3725 it). Don't bother to complain(), Sun's compiler omits the semicolon
3732 struct type
*type
= init_type (objfile
, TYPE_CODE_VOID
,
3733 TARGET_CHAR_BIT
, NULL
);
3735 type
->set_is_unsigned (true);
3741 return init_boolean_type (objfile
, type_bits
, unsigned_type
, NULL
);
3743 return init_integer_type (objfile
, type_bits
, unsigned_type
, NULL
);
3746 static struct type
*
3747 read_sun_floating_type (const char **pp
, int typenums
[2],
3748 struct objfile
*objfile
)
3753 struct type
*rettype
;
3755 /* The first number has more details about the type, for example
3757 details
= read_huge_number (pp
, ';', &nbits
, 0);
3759 return error_type (pp
, objfile
);
3761 /* The second number is the number of bytes occupied by this type. */
3762 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3764 return error_type (pp
, objfile
);
3766 nbits
= nbytes
* TARGET_CHAR_BIT
;
3768 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3769 || details
== NF_COMPLEX32
)
3771 rettype
= dbx_init_float_type (objfile
, nbits
/ 2);
3772 return init_complex_type (NULL
, rettype
);
3775 return dbx_init_float_type (objfile
, nbits
);
3778 /* Read a number from the string pointed to by *PP.
3779 The value of *PP is advanced over the number.
3780 If END is nonzero, the character that ends the
3781 number must match END, or an error happens;
3782 and that character is skipped if it does match.
3783 If END is zero, *PP is left pointing to that character.
3785 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3786 the number is represented in an octal representation, assume that
3787 it is represented in a 2's complement representation with a size of
3788 TWOS_COMPLEMENT_BITS.
3790 If the number fits in a long, set *BITS to 0 and return the value.
3791 If not, set *BITS to be the number of bits in the number and return 0.
3793 If encounter garbage, set *BITS to -1 and return 0. */
3796 read_huge_number (const char **pp
, int end
, int *bits
,
3797 int twos_complement_bits
)
3799 const char *p
= *pp
;
3808 int twos_complement_representation
= 0;
3816 /* Leading zero means octal. GCC uses this to output values larger
3817 than an int (because that would be hard in decimal). */
3824 /* Skip extra zeros. */
3828 if (sign
> 0 && radix
== 8 && twos_complement_bits
> 0)
3830 /* Octal, possibly signed. Check if we have enough chars for a
3836 while ((c
= *p1
) >= '0' && c
< '8')
3840 if (len
> twos_complement_bits
/ 3
3841 || (twos_complement_bits
% 3 == 0
3842 && len
== twos_complement_bits
/ 3))
3844 /* Ok, we have enough characters for a signed value, check
3845 for signedness by testing if the sign bit is set. */
3846 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3848 if (c
& (1 << sign_bit
))
3850 /* Definitely signed. */
3851 twos_complement_representation
= 1;
3857 upper_limit
= LONG_MAX
/ radix
;
3859 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3861 if (n
<= upper_limit
)
3863 if (twos_complement_representation
)
3865 /* Octal, signed, twos complement representation. In
3866 this case, n is the corresponding absolute value. */
3869 long sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3881 /* unsigned representation */
3883 n
+= c
- '0'; /* FIXME this overflows anyway. */
3889 /* This depends on large values being output in octal, which is
3896 /* Ignore leading zeroes. */
3900 else if (c
== '2' || c
== '3')
3921 if (radix
== 8 && twos_complement_bits
> 0 && nbits
> twos_complement_bits
)
3923 /* We were supposed to parse a number with maximum
3924 TWOS_COMPLEMENT_BITS bits, but something went wrong. */
3935 /* Large decimal constants are an error (because it is hard to
3936 count how many bits are in them). */
3942 /* -0x7f is the same as 0x80. So deal with it by adding one to
3943 the number of bits. Two's complement represention octals
3944 can't have a '-' in front. */
3945 if (sign
== -1 && !twos_complement_representation
)
3956 /* It's *BITS which has the interesting information. */
3960 static struct type
*
3961 read_range_type (const char **pp
, int typenums
[2], int type_size
,
3962 struct objfile
*objfile
)
3964 struct gdbarch
*gdbarch
= objfile
->arch ();
3965 const char *orig_pp
= *pp
;
3970 struct type
*result_type
;
3971 struct type
*index_type
= NULL
;
3973 /* First comes a type we are a subrange of.
3974 In C it is usually 0, 1 or the type being defined. */
3975 if (read_type_number (pp
, rangenums
) != 0)
3976 return error_type (pp
, objfile
);
3977 self_subrange
= (rangenums
[0] == typenums
[0] &&
3978 rangenums
[1] == typenums
[1]);
3983 index_type
= read_type (pp
, objfile
);
3986 /* A semicolon should now follow; skip it. */
3990 /* The remaining two operands are usually lower and upper bounds
3991 of the range. But in some special cases they mean something else. */
3992 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3993 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3995 if (n2bits
== -1 || n3bits
== -1)
3996 return error_type (pp
, objfile
);
3999 goto handle_true_range
;
4001 /* If limits are huge, must be large integral type. */
4002 if (n2bits
!= 0 || n3bits
!= 0)
4004 char got_signed
= 0;
4005 char got_unsigned
= 0;
4006 /* Number of bits in the type. */
4009 /* If a type size attribute has been specified, the bounds of
4010 the range should fit in this size. If the lower bounds needs
4011 more bits than the upper bound, then the type is signed. */
4012 if (n2bits
<= type_size
&& n3bits
<= type_size
)
4014 if (n2bits
== type_size
&& n2bits
> n3bits
)
4020 /* Range from 0 to <large number> is an unsigned large integral type. */
4021 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
4026 /* Range from <large number> to <large number>-1 is a large signed
4027 integral type. Take care of the case where <large number> doesn't
4028 fit in a long but <large number>-1 does. */
4029 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
4030 || (n2bits
!= 0 && n3bits
== 0
4031 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
4038 if (got_signed
|| got_unsigned
)
4039 return init_integer_type (objfile
, nbits
, got_unsigned
, NULL
);
4041 return error_type (pp
, objfile
);
4044 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4045 if (self_subrange
&& n2
== 0 && n3
== 0)
4046 return init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
4048 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4049 is the width in bytes.
4051 Fortran programs appear to use this for complex types also. To
4052 distinguish between floats and complex, g77 (and others?) seem
4053 to use self-subranges for the complexes, and subranges of int for
4056 Also note that for complexes, g77 sets n2 to the size of one of
4057 the member floats, not the whole complex beast. My guess is that
4058 this was to work well with pre-COMPLEX versions of gdb. */
4060 if (n3
== 0 && n2
> 0)
4062 struct type
*float_type
4063 = dbx_init_float_type (objfile
, n2
* TARGET_CHAR_BIT
);
4066 return init_complex_type (NULL
, float_type
);
4071 /* If the upper bound is -1, it must really be an unsigned integral. */
4073 else if (n2
== 0 && n3
== -1)
4075 int bits
= type_size
;
4079 /* We don't know its size. It is unsigned int or unsigned
4080 long. GCC 2.3.3 uses this for long long too, but that is
4081 just a GDB 3.5 compatibility hack. */
4082 bits
= gdbarch_int_bit (gdbarch
);
4085 return init_integer_type (objfile
, bits
, 1, NULL
);
4088 /* Special case: char is defined (Who knows why) as a subrange of
4089 itself with range 0-127. */
4090 else if (self_subrange
&& n2
== 0 && n3
== 127)
4092 struct type
*type
= init_integer_type (objfile
, TARGET_CHAR_BIT
,
4094 type
->set_has_no_signedness (true);
4097 /* We used to do this only for subrange of self or subrange of int. */
4100 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4101 "unsigned long", and we already checked for that,
4102 so don't need to test for it here. */
4105 /* n3 actually gives the size. */
4106 return init_integer_type (objfile
, -n3
* TARGET_CHAR_BIT
, 1, NULL
);
4108 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4109 unsigned n-byte integer. But do require n to be a power of
4110 two; we don't want 3- and 5-byte integers flying around. */
4116 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
4119 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
4120 return init_integer_type (objfile
, bytes
* TARGET_CHAR_BIT
, 1, NULL
);
4123 /* I think this is for Convex "long long". Since I don't know whether
4124 Convex sets self_subrange, I also accept that particular size regardless
4125 of self_subrange. */
4126 else if (n3
== 0 && n2
< 0
4128 || n2
== -gdbarch_long_long_bit
4129 (gdbarch
) / TARGET_CHAR_BIT
))
4130 return init_integer_type (objfile
, -n2
* TARGET_CHAR_BIT
, 0, NULL
);
4131 else if (n2
== -n3
- 1)
4134 return init_integer_type (objfile
, 8, 0, NULL
);
4136 return init_integer_type (objfile
, 16, 0, NULL
);
4137 if (n3
== 0x7fffffff)
4138 return init_integer_type (objfile
, 32, 0, NULL
);
4141 /* We have a real range type on our hands. Allocate space and
4142 return a real pointer. */
4146 index_type
= objfile_type (objfile
)->builtin_int
;
4148 index_type
= *dbx_lookup_type (rangenums
, objfile
);
4149 if (index_type
== NULL
)
4151 /* Does this actually ever happen? Is that why we are worrying
4152 about dealing with it rather than just calling error_type? */
4154 complaint (_("base type %d of range type is not defined"), rangenums
[1]);
4156 index_type
= objfile_type (objfile
)->builtin_int
;
4160 = create_static_range_type (NULL
, index_type
, n2
, n3
);
4161 return (result_type
);
4164 /* Read in an argument list. This is a list of types, separated by commas
4165 and terminated with END. Return the list of types read in, or NULL
4166 if there is an error. */
4168 static struct field
*
4169 read_args (const char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4172 /* FIXME! Remove this arbitrary limit! */
4173 struct type
*types
[1024]; /* Allow for fns of 1023 parameters. */
4180 /* Invalid argument list: no ','. */
4183 STABS_CONTINUE (pp
, objfile
);
4184 types
[n
++] = read_type (pp
, objfile
);
4186 (*pp
)++; /* get past `end' (the ':' character). */
4190 /* We should read at least the THIS parameter here. Some broken stabs
4191 output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
4192 have been present ";-16,(0,43)" reference instead. This way the
4193 excessive ";" marker prematurely stops the parameters parsing. */
4195 complaint (_("Invalid (empty) method arguments"));
4198 else if (types
[n
- 1]->code () != TYPE_CODE_VOID
)
4206 rval
= XCNEWVEC (struct field
, n
);
4207 for (i
= 0; i
< n
; i
++)
4208 rval
[i
].set_type (types
[i
]);
4213 /* Common block handling. */
4215 /* List of symbols declared since the last BCOMM. This list is a tail
4216 of local_symbols. When ECOMM is seen, the symbols on the list
4217 are noted so their proper addresses can be filled in later,
4218 using the common block base address gotten from the assembler
4221 static struct pending
*common_block
;
4222 static int common_block_i
;
4224 /* Name of the current common block. We get it from the BCOMM instead of the
4225 ECOMM to match IBM documentation (even though IBM puts the name both places
4226 like everyone else). */
4227 static char *common_block_name
;
4229 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4230 to remain after this function returns. */
4233 common_block_start (const char *name
, struct objfile
*objfile
)
4235 if (common_block_name
!= NULL
)
4237 complaint (_("Invalid symbol data: common block within common block"));
4239 common_block
= *get_local_symbols ();
4240 common_block_i
= common_block
? common_block
->nsyms
: 0;
4241 common_block_name
= obstack_strdup (&objfile
->objfile_obstack
, name
);
4244 /* Process a N_ECOMM symbol. */
4247 common_block_end (struct objfile
*objfile
)
4249 /* Symbols declared since the BCOMM are to have the common block
4250 start address added in when we know it. common_block and
4251 common_block_i point to the first symbol after the BCOMM in
4252 the local_symbols list; copy the list and hang it off the
4253 symbol for the common block name for later fixup. */
4256 struct pending
*newobj
= 0;
4257 struct pending
*next
;
4260 if (common_block_name
== NULL
)
4262 complaint (_("ECOMM symbol unmatched by BCOMM"));
4266 sym
= new (&objfile
->objfile_obstack
) symbol
;
4267 /* Note: common_block_name already saved on objfile_obstack. */
4268 sym
->set_linkage_name (common_block_name
);
4269 sym
->set_aclass_index (LOC_BLOCK
);
4271 /* Now we copy all the symbols which have been defined since the BCOMM. */
4273 /* Copy all the struct pendings before common_block. */
4274 for (next
= *get_local_symbols ();
4275 next
!= NULL
&& next
!= common_block
;
4278 for (j
= 0; j
< next
->nsyms
; j
++)
4279 add_symbol_to_list (next
->symbol
[j
], &newobj
);
4282 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4283 NULL, it means copy all the local symbols (which we already did
4286 if (common_block
!= NULL
)
4287 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4288 add_symbol_to_list (common_block
->symbol
[j
], &newobj
);
4290 sym
->set_type ((struct type
*) newobj
);
4292 /* Should we be putting local_symbols back to what it was?
4295 i
= hashname (sym
->linkage_name ());
4296 sym
->set_value_chain (global_sym_chain
[i
]);
4297 global_sym_chain
[i
] = sym
;
4298 common_block_name
= NULL
;
4301 /* Add a common block's start address to the offset of each symbol
4302 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4303 the common block name). */
4306 fix_common_block (struct symbol
*sym
, CORE_ADDR valu
, int section_index
)
4308 struct pending
*next
= (struct pending
*) sym
->type ();
4310 for (; next
; next
= next
->next
)
4314 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4316 next
->symbol
[j
]->set_value_address
4317 (next
->symbol
[j
]->value_address () + valu
);
4318 next
->symbol
[j
]->set_section_index (section_index
);
4325 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4326 See add_undefined_type for more details. */
4329 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4333 nat
.typenums
[0] = typenums
[0];
4334 nat
.typenums
[1] = typenums
[1];
4337 if (noname_undefs_length
== noname_undefs_allocated
)
4339 noname_undefs_allocated
*= 2;
4340 noname_undefs
= (struct nat
*)
4341 xrealloc ((char *) noname_undefs
,
4342 noname_undefs_allocated
* sizeof (struct nat
));
4344 noname_undefs
[noname_undefs_length
++] = nat
;
4347 /* Add TYPE to the UNDEF_TYPES vector.
4348 See add_undefined_type for more details. */
4351 add_undefined_type_1 (struct type
*type
)
4353 if (undef_types_length
== undef_types_allocated
)
4355 undef_types_allocated
*= 2;
4356 undef_types
= (struct type
**)
4357 xrealloc ((char *) undef_types
,
4358 undef_types_allocated
* sizeof (struct type
*));
4360 undef_types
[undef_types_length
++] = type
;
4363 /* What about types defined as forward references inside of a small lexical
4365 /* Add a type to the list of undefined types to be checked through
4366 once this file has been read in.
4368 In practice, we actually maintain two such lists: The first list
4369 (UNDEF_TYPES) is used for types whose name has been provided, and
4370 concerns forward references (eg 'xs' or 'xu' forward references);
4371 the second list (NONAME_UNDEFS) is used for types whose name is
4372 unknown at creation time, because they were referenced through
4373 their type number before the actual type was declared.
4374 This function actually adds the given type to the proper list. */
4377 add_undefined_type (struct type
*type
, int typenums
[2])
4379 if (type
->name () == NULL
)
4380 add_undefined_type_noname (type
, typenums
);
4382 add_undefined_type_1 (type
);
4385 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4388 cleanup_undefined_types_noname (struct objfile
*objfile
)
4392 for (i
= 0; i
< noname_undefs_length
; i
++)
4394 struct nat nat
= noname_undefs
[i
];
4397 type
= dbx_lookup_type (nat
.typenums
, objfile
);
4398 if (nat
.type
!= *type
&& (*type
)->code () != TYPE_CODE_UNDEF
)
4400 /* The instance flags of the undefined type are still unset,
4401 and needs to be copied over from the reference type.
4402 Since replace_type expects them to be identical, we need
4403 to set these flags manually before hand. */
4404 nat
.type
->set_instance_flags ((*type
)->instance_flags ());
4405 replace_type (nat
.type
, *type
);
4409 noname_undefs_length
= 0;
4412 /* Go through each undefined type, see if it's still undefined, and fix it
4413 up if possible. We have two kinds of undefined types:
4415 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4416 Fix: update array length using the element bounds
4417 and the target type's length.
4418 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4419 yet defined at the time a pointer to it was made.
4420 Fix: Do a full lookup on the struct/union tag. */
4423 cleanup_undefined_types_1 (void)
4427 /* Iterate over every undefined type, and look for a symbol whose type
4428 matches our undefined type. The symbol matches if:
4429 1. It is a typedef in the STRUCT domain;
4430 2. It has the same name, and same type code;
4431 3. The instance flags are identical.
4433 It is important to check the instance flags, because we have seen
4434 examples where the debug info contained definitions such as:
4436 "foo_t:t30=B31=xefoo_t:"
4438 In this case, we have created an undefined type named "foo_t" whose
4439 instance flags is null (when processing "xefoo_t"), and then created
4440 another type with the same name, but with different instance flags
4441 ('B' means volatile). I think that the definition above is wrong,
4442 since the same type cannot be volatile and non-volatile at the same
4443 time, but we need to be able to cope with it when it happens. The
4444 approach taken here is to treat these two types as different. */
4446 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4448 switch ((*type
)->code ())
4451 case TYPE_CODE_STRUCT
:
4452 case TYPE_CODE_UNION
:
4453 case TYPE_CODE_ENUM
:
4455 /* Check if it has been defined since. Need to do this here
4456 as well as in check_typedef to deal with the (legitimate in
4457 C though not C++) case of several types with the same name
4458 in different source files. */
4459 if ((*type
)->is_stub ())
4461 struct pending
*ppt
;
4463 /* Name of the type, without "struct" or "union". */
4464 const char *type_name
= (*type
)->name ();
4466 if (type_name
== NULL
)
4468 complaint (_("need a type name"));
4471 for (ppt
= *get_file_symbols (); ppt
; ppt
= ppt
->next
)
4473 for (i
= 0; i
< ppt
->nsyms
; i
++)
4475 struct symbol
*sym
= ppt
->symbol
[i
];
4477 if (sym
->aclass () == LOC_TYPEDEF
4478 && sym
->domain () == STRUCT_DOMAIN
4479 && (sym
->type ()->code () == (*type
)->code ())
4480 && ((*type
)->instance_flags ()
4481 == sym
->type ()->instance_flags ())
4482 && strcmp (sym
->linkage_name (), type_name
) == 0)
4483 replace_type (*type
, sym
->type ());
4492 complaint (_("forward-referenced types left unresolved, "
4500 undef_types_length
= 0;
4503 /* Try to fix all the undefined types we encountered while processing
4507 cleanup_undefined_stabs_types (struct objfile
*objfile
)
4509 cleanup_undefined_types_1 ();
4510 cleanup_undefined_types_noname (objfile
);
4513 /* See stabsread.h. */
4516 scan_file_globals (struct objfile
*objfile
)
4519 struct symbol
*sym
, *prev
;
4520 struct objfile
*resolve_objfile
;
4522 /* SVR4 based linkers copy referenced global symbols from shared
4523 libraries to the main executable.
4524 If we are scanning the symbols for a shared library, try to resolve
4525 them from the minimal symbols of the main executable first. */
4527 if (current_program_space
->symfile_object_file
4528 && objfile
!= current_program_space
->symfile_object_file
)
4529 resolve_objfile
= current_program_space
->symfile_object_file
;
4531 resolve_objfile
= objfile
;
4535 /* Avoid expensive loop through all minimal symbols if there are
4536 no unresolved symbols. */
4537 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4539 if (global_sym_chain
[hash
])
4542 if (hash
>= HASHSIZE
)
4545 for (minimal_symbol
*msymbol
: resolve_objfile
->msymbols ())
4549 /* Skip static symbols. */
4550 switch (msymbol
->type ())
4562 /* Get the hash index and check all the symbols
4563 under that hash index. */
4565 hash
= hashname (msymbol
->linkage_name ());
4567 for (sym
= global_sym_chain
[hash
]; sym
;)
4569 if (strcmp (msymbol
->linkage_name (), sym
->linkage_name ()) == 0)
4571 /* Splice this symbol out of the hash chain and
4572 assign the value we have to it. */
4575 prev
->set_value_chain (sym
->value_chain ());
4579 global_sym_chain
[hash
] = sym
->value_chain ();
4582 /* Check to see whether we need to fix up a common block. */
4583 /* Note: this code might be executed several times for
4584 the same symbol if there are multiple references. */
4587 if (sym
->aclass () == LOC_BLOCK
)
4589 (sym
, msymbol
->value_address (resolve_objfile
),
4590 msymbol
->section_index ());
4592 sym
->set_value_address
4593 (msymbol
->value_address (resolve_objfile
));
4594 sym
->set_section_index (msymbol
->section_index ());
4599 sym
= prev
->value_chain ();
4603 sym
= global_sym_chain
[hash
];
4609 sym
= sym
->value_chain ();
4613 if (resolve_objfile
== objfile
)
4615 resolve_objfile
= objfile
;
4618 /* Change the storage class of any remaining unresolved globals to
4619 LOC_UNRESOLVED and remove them from the chain. */
4620 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4622 sym
= global_sym_chain
[hash
];
4626 sym
= sym
->value_chain ();
4628 /* Change the symbol address from the misleading chain value
4630 prev
->set_value_address (0);
4632 /* Complain about unresolved common block symbols. */
4633 if (prev
->aclass () == LOC_STATIC
)
4634 prev
->set_aclass_index (LOC_UNRESOLVED
);
4636 complaint (_("%s: common block `%s' from "
4637 "global_sym_chain unresolved"),
4638 objfile_name (objfile
), prev
->print_name ());
4641 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4644 /* Initialize anything that needs initializing when starting to read
4645 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4649 stabsread_init (void)
4653 /* Initialize anything that needs initializing when a completely new
4654 symbol file is specified (not just adding some symbols from another
4655 file, e.g. a shared library). */
4658 stabsread_new_init (void)
4660 /* Empty the hash table of global syms looking for values. */
4661 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4664 /* Initialize anything that needs initializing at the same time as
4665 start_compunit_symtab() is called. */
4670 global_stabs
= NULL
; /* AIX COFF */
4671 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4672 n_this_object_header_files
= 1;
4673 type_vector_length
= 0;
4674 type_vector
= (struct type
**) 0;
4675 within_function
= 0;
4677 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4678 common_block_name
= NULL
;
4681 /* Call after end_compunit_symtab(). */
4688 xfree (type_vector
);
4691 type_vector_length
= 0;
4692 previous_stab_code
= 0;
4696 finish_global_stabs (struct objfile
*objfile
)
4700 patch_block_stabs (*get_global_symbols (), global_stabs
, objfile
);
4701 xfree (global_stabs
);
4702 global_stabs
= NULL
;
4706 /* Find the end of the name, delimited by a ':', but don't match
4707 ObjC symbols which look like -[Foo bar::]:bla. */
4709 find_name_end (const char *name
)
4711 const char *s
= name
;
4713 if (s
[0] == '-' || *s
== '+')
4715 /* Must be an ObjC method symbol. */
4718 error (_("invalid symbol name \"%s\""), name
);
4720 s
= strchr (s
, ']');
4723 error (_("invalid symbol name \"%s\""), name
);
4725 return strchr (s
, ':');
4729 return strchr (s
, ':');
4733 /* See stabsread.h. */
4736 hashname (const char *name
)
4738 return fast_hash (name
, strlen (name
)) % HASHSIZE
;
4741 /* Initializer for this module. */
4743 void _initialize_stabsread ();
4745 _initialize_stabsread ()
4747 undef_types_allocated
= 20;
4748 undef_types_length
= 0;
4749 undef_types
= XNEWVEC (struct type
*, undef_types_allocated
);
4751 noname_undefs_allocated
= 20;
4752 noname_undefs_length
= 0;
4753 noname_undefs
= XNEWVEC (struct nat
, noname_undefs_allocated
);
4755 stab_register_index
= register_symbol_register_impl (LOC_REGISTER
,
4756 &stab_register_funcs
);
4757 stab_regparm_index
= register_symbol_register_impl (LOC_REGPARM_ADDR
,
4758 &stab_register_funcs
);