1 /* Support routines for decoding "stabs" debugging information format.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 /* Support routines for reading and decoding debugging information in
25 the "stabs" format. This format is used with many systems that use
26 the a.out object file format, as well as some systems that use
27 COFF or ELF where the stabs data is placed in a special section.
28 Avoid placing any object file format specific code in this file. */
31 #include "gdb_string.h"
33 #include "gdb_obstack.h"
36 #include "expression.h"
39 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
41 #include "aout/aout64.h"
42 #include "gdb-stabs.h"
44 #include "complaints.h"
49 #include "cp-support.h"
53 /* Ask stabsread.h to define the vars it normally declares `extern'. */
56 #include "stabsread.h" /* Our own declarations */
59 extern void _initialize_stabsread (void);
61 /* The routines that read and process a complete stabs for a C struct or
62 C++ class pass lists of data member fields and lists of member function
63 fields in an instance of a field_info structure, as defined below.
64 This is part of some reorganization of low level C++ support and is
65 expected to eventually go away... (FIXME) */
71 struct nextfield
*next
;
73 /* This is the raw visibility from the stab. It is not checked
74 for being one of the visibilities we recognize, so code which
75 examines this field better be able to deal. */
81 struct next_fnfieldlist
83 struct next_fnfieldlist
*next
;
84 struct fn_fieldlist fn_fieldlist
;
90 read_one_struct_field (struct field_info
*, char **, char *,
91 struct type
*, struct objfile
*);
93 static struct type
*dbx_alloc_type (int[2], struct objfile
*);
95 static long read_huge_number (char **, int, int *, int);
97 static struct type
*error_type (char **, struct objfile
*);
100 patch_block_stabs (struct pending
*, struct pending_stabs
*,
103 static void fix_common_block (struct symbol
*, int);
105 static int read_type_number (char **, int *);
107 static struct type
*read_type (char **, struct objfile
*);
109 static struct type
*read_range_type (char **, int[2], int, struct objfile
*);
111 static struct type
*read_sun_builtin_type (char **, int[2], struct objfile
*);
113 static struct type
*read_sun_floating_type (char **, int[2],
116 static struct type
*read_enum_type (char **, struct type
*, struct objfile
*);
118 static struct type
*rs6000_builtin_type (int);
121 read_member_functions (struct field_info
*, char **, struct type
*,
125 read_struct_fields (struct field_info
*, char **, struct type
*,
129 read_baseclasses (struct field_info
*, char **, struct type
*,
133 read_tilde_fields (struct field_info
*, char **, struct type
*,
136 static int attach_fn_fields_to_type (struct field_info
*, struct type
*);
138 static int attach_fields_to_type (struct field_info
*, struct type
*,
141 static struct type
*read_struct_type (char **, struct type
*,
145 static struct type
*read_array_type (char **, struct type
*,
148 static struct field
*read_args (char **, int, struct objfile
*, int *, int *);
150 static void add_undefined_type (struct type
*, int[2]);
153 read_cpp_abbrev (struct field_info
*, char **, struct type
*,
156 static char *find_name_end (char *name
);
158 static int process_reference (char **string
);
160 void stabsread_clear_cache (void);
162 static const char vptr_name
[] = "_vptr$";
163 static const char vb_name
[] = "_vb$";
165 /* Define this as 1 if a pcc declaration of a char or short argument
166 gives the correct address. Otherwise assume pcc gives the
167 address of the corresponding int, which is not the same on a
168 big-endian machine. */
170 #if !defined (BELIEVE_PCC_PROMOTION)
171 #define BELIEVE_PCC_PROMOTION 0
175 invalid_cpp_abbrev_complaint (const char *arg1
)
177 complaint (&symfile_complaints
, _("invalid C++ abbreviation `%s'"), arg1
);
181 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
183 complaint (&symfile_complaints
,
184 _("register number %d too large (max %d) in symbol %s"),
185 regnum
, num_regs
- 1, sym
);
189 stabs_general_complaint (const char *arg1
)
191 complaint (&symfile_complaints
, "%s", arg1
);
194 /* Make a list of forward references which haven't been defined. */
196 static struct type
**undef_types
;
197 static int undef_types_allocated
;
198 static int undef_types_length
;
199 static struct symbol
*current_symbol
= NULL
;
201 /* Make a list of nameless types that are undefined.
202 This happens when another type is referenced by its number
203 before this type is actually defined. For instance "t(0,1)=k(0,2)"
204 and type (0,2) is defined only later. */
211 static struct nat
*noname_undefs
;
212 static int noname_undefs_allocated
;
213 static int noname_undefs_length
;
215 /* Check for and handle cretinous stabs symbol name continuation! */
216 #define STABS_CONTINUE(pp,objfile) \
218 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
219 *(pp) = next_symbol_text (objfile); \
223 /* Look up a dbx type-number pair. Return the address of the slot
224 where the type for that number-pair is stored.
225 The number-pair is in TYPENUMS.
227 This can be used for finding the type associated with that pair
228 or for associating a new type with the pair. */
230 static struct type
**
231 dbx_lookup_type (int typenums
[2])
233 int filenum
= typenums
[0];
234 int index
= typenums
[1];
237 struct header_file
*f
;
240 if (filenum
== -1) /* -1,-1 is for temporary types. */
243 if (filenum
< 0 || filenum
>= n_this_object_header_files
)
245 complaint (&symfile_complaints
,
246 _("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d."),
247 filenum
, index
, symnum
);
255 /* Caller wants address of address of type. We think
256 that negative (rs6k builtin) types will never appear as
257 "lvalues", (nor should they), so we stuff the real type
258 pointer into a temp, and return its address. If referenced,
259 this will do the right thing. */
260 static struct type
*temp_type
;
262 temp_type
= rs6000_builtin_type (index
);
266 /* Type is defined outside of header files.
267 Find it in this object file's type vector. */
268 if (index
>= type_vector_length
)
270 old_len
= type_vector_length
;
273 type_vector_length
= INITIAL_TYPE_VECTOR_LENGTH
;
274 type_vector
= (struct type
**)
275 xmalloc (type_vector_length
* sizeof (struct type
*));
277 while (index
>= type_vector_length
)
279 type_vector_length
*= 2;
281 type_vector
= (struct type
**)
282 xrealloc ((char *) type_vector
,
283 (type_vector_length
* sizeof (struct type
*)));
284 memset (&type_vector
[old_len
], 0,
285 (type_vector_length
- old_len
) * sizeof (struct type
*));
287 return (&type_vector
[index
]);
291 real_filenum
= this_object_header_files
[filenum
];
293 if (real_filenum
>= N_HEADER_FILES (current_objfile
))
295 struct type
*temp_type
;
296 struct type
**temp_type_p
;
298 warning (_("GDB internal error: bad real_filenum"));
301 temp_type
= init_type (TYPE_CODE_ERROR
, 0, 0, NULL
, NULL
);
302 temp_type_p
= (struct type
**) xmalloc (sizeof (struct type
*));
303 *temp_type_p
= temp_type
;
307 f
= HEADER_FILES (current_objfile
) + real_filenum
;
309 f_orig_length
= f
->length
;
310 if (index
>= f_orig_length
)
312 while (index
>= f
->length
)
316 f
->vector
= (struct type
**)
317 xrealloc ((char *) f
->vector
, f
->length
* sizeof (struct type
*));
318 memset (&f
->vector
[f_orig_length
], 0,
319 (f
->length
- f_orig_length
) * sizeof (struct type
*));
321 return (&f
->vector
[index
]);
325 /* Make sure there is a type allocated for type numbers TYPENUMS
326 and return the type object.
327 This can create an empty (zeroed) type object.
328 TYPENUMS may be (-1, -1) to return a new type object that is not
329 put into the type vector, and so may not be referred to by number. */
332 dbx_alloc_type (int typenums
[2], struct objfile
*objfile
)
334 struct type
**type_addr
;
336 if (typenums
[0] == -1)
338 return (alloc_type (objfile
));
341 type_addr
= dbx_lookup_type (typenums
);
343 /* If we are referring to a type not known at all yet,
344 allocate an empty type for it.
345 We will fill it in later if we find out how. */
348 *type_addr
= alloc_type (objfile
);
354 /* for all the stabs in a given stab vector, build appropriate types
355 and fix their symbols in given symbol vector. */
358 patch_block_stabs (struct pending
*symbols
, struct pending_stabs
*stabs
,
359 struct objfile
*objfile
)
369 /* for all the stab entries, find their corresponding symbols and
370 patch their types! */
372 for (ii
= 0; ii
< stabs
->count
; ++ii
)
374 name
= stabs
->stab
[ii
];
375 pp
= (char *) strchr (name
, ':');
379 pp
= (char *) strchr (pp
, ':');
381 sym
= find_symbol_in_list (symbols
, name
, pp
- name
);
384 /* FIXME-maybe: it would be nice if we noticed whether
385 the variable was defined *anywhere*, not just whether
386 it is defined in this compilation unit. But neither
387 xlc or GCC seem to need such a definition, and until
388 we do psymtabs (so that the minimal symbols from all
389 compilation units are available now), I'm not sure
390 how to get the information. */
392 /* On xcoff, if a global is defined and never referenced,
393 ld will remove it from the executable. There is then
394 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
395 sym
= (struct symbol
*)
396 obstack_alloc (&objfile
->objfile_obstack
,
397 sizeof (struct symbol
));
399 memset (sym
, 0, sizeof (struct symbol
));
400 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
401 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
402 DEPRECATED_SYMBOL_NAME (sym
) =
403 obsavestring (name
, pp
- name
, &objfile
->objfile_obstack
);
405 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
407 /* I don't think the linker does this with functions,
408 so as far as I know this is never executed.
409 But it doesn't hurt to check. */
411 lookup_function_type (read_type (&pp
, objfile
));
415 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
417 add_symbol_to_list (sym
, &global_symbols
);
422 if (*(pp
- 1) == 'F' || *(pp
- 1) == 'f')
425 lookup_function_type (read_type (&pp
, objfile
));
429 SYMBOL_TYPE (sym
) = read_type (&pp
, objfile
);
437 /* Read a number by which a type is referred to in dbx data,
438 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
439 Just a single number N is equivalent to (0,N).
440 Return the two numbers by storing them in the vector TYPENUMS.
441 TYPENUMS will then be used as an argument to dbx_lookup_type.
443 Returns 0 for success, -1 for error. */
446 read_type_number (char **pp
, int *typenums
)
452 typenums
[0] = read_huge_number (pp
, ',', &nbits
, 0);
455 typenums
[1] = read_huge_number (pp
, ')', &nbits
, 0);
462 typenums
[1] = read_huge_number (pp
, 0, &nbits
, 0);
470 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
471 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
472 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
473 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
475 /* Structure for storing pointers to reference definitions for fast lookup
476 during "process_later". */
485 #define MAX_CHUNK_REFS 100
486 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
487 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
489 static struct ref_map
*ref_map
;
491 /* Ptr to free cell in chunk's linked list. */
492 static int ref_count
= 0;
494 /* Number of chunks malloced. */
495 static int ref_chunk
= 0;
497 /* This file maintains a cache of stabs aliases found in the symbol
498 table. If the symbol table changes, this cache must be cleared
499 or we are left holding onto data in invalid obstacks. */
501 stabsread_clear_cache (void)
507 /* Create array of pointers mapping refids to symbols and stab strings.
508 Add pointers to reference definition symbols and/or their values as we
509 find them, using their reference numbers as our index.
510 These will be used later when we resolve references. */
512 ref_add (int refnum
, struct symbol
*sym
, char *stabs
, CORE_ADDR value
)
516 if (refnum
>= ref_count
)
517 ref_count
= refnum
+ 1;
518 if (ref_count
> ref_chunk
* MAX_CHUNK_REFS
)
520 int new_slots
= ref_count
- ref_chunk
* MAX_CHUNK_REFS
;
521 int new_chunks
= new_slots
/ MAX_CHUNK_REFS
+ 1;
522 ref_map
= (struct ref_map
*)
523 xrealloc (ref_map
, REF_MAP_SIZE (ref_chunk
+ new_chunks
));
524 memset (ref_map
+ ref_chunk
* MAX_CHUNK_REFS
, 0, new_chunks
* REF_CHUNK_SIZE
);
525 ref_chunk
+= new_chunks
;
527 ref_map
[refnum
].stabs
= stabs
;
528 ref_map
[refnum
].sym
= sym
;
529 ref_map
[refnum
].value
= value
;
532 /* Return defined sym for the reference REFNUM. */
534 ref_search (int refnum
)
536 if (refnum
< 0 || refnum
> ref_count
)
538 return ref_map
[refnum
].sym
;
541 /* Parse a reference id in STRING and return the resulting
542 reference number. Move STRING beyond the reference id. */
545 process_reference (char **string
)
553 /* Advance beyond the initial '#'. */
556 /* Read number as reference id. */
557 while (*p
&& isdigit (*p
))
559 refnum
= refnum
* 10 + *p
- '0';
566 /* If STRING defines a reference, store away a pointer to the reference
567 definition for later use. Return the reference number. */
570 symbol_reference_defined (char **string
)
575 refnum
= process_reference (&p
);
577 /* Defining symbols end in '=' */
580 /* Symbol is being defined here. */
586 /* Must be a reference. Either the symbol has already been defined,
587 or this is a forward reference to it. */
594 define_symbol (CORE_ADDR valu
, char *string
, int desc
, int type
,
595 struct objfile
*objfile
)
598 char *p
= (char *) find_name_end (string
);
603 /* We would like to eliminate nameless symbols, but keep their types.
604 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
605 to type 2, but, should not create a symbol to address that type. Since
606 the symbol will be nameless, there is no way any user can refer to it. */
610 /* Ignore syms with empty names. */
614 /* Ignore old-style symbols from cc -go */
624 /* If a nameless stab entry, all we need is the type, not the symbol.
625 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
626 nameless
= (p
== string
|| ((string
[0] == ' ') && (string
[1] == ':')));
628 current_symbol
= sym
= (struct symbol
*)
629 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
630 memset (sym
, 0, sizeof (struct symbol
));
632 switch (type
& N_TYPE
)
635 SYMBOL_SECTION (sym
) = SECT_OFF_TEXT (objfile
);
638 SYMBOL_SECTION (sym
) = SECT_OFF_DATA (objfile
);
641 SYMBOL_SECTION (sym
) = SECT_OFF_BSS (objfile
);
645 if (processing_gcc_compilation
)
647 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
648 number of bytes occupied by a type or object, which we ignore. */
649 SYMBOL_LINE (sym
) = desc
;
653 SYMBOL_LINE (sym
) = 0; /* unknown */
656 if (is_cplus_marker (string
[0]))
658 /* Special GNU C++ names. */
662 DEPRECATED_SYMBOL_NAME (sym
) = obsavestring ("this", strlen ("this"),
663 &objfile
->objfile_obstack
);
666 case 'v': /* $vtbl_ptr_type */
667 /* Was: DEPRECATED_SYMBOL_NAME (sym) = "vptr"; */
671 DEPRECATED_SYMBOL_NAME (sym
) = obsavestring ("eh_throw", strlen ("eh_throw"),
672 &objfile
->objfile_obstack
);
676 /* This was an anonymous type that was never fixed up. */
679 #ifdef STATIC_TRANSFORM_NAME
681 /* SunPRO (3.0 at least) static variable encoding. */
686 complaint (&symfile_complaints
, _("Unknown C++ symbol name `%s'"),
688 goto normal
; /* Do *something* with it */
694 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
695 SYMBOL_SET_NAMES (sym
, string
, p
- string
, objfile
);
699 /* Determine the type of name being defined. */
701 /* Getting GDB to correctly skip the symbol on an undefined symbol
702 descriptor and not ever dump core is a very dodgy proposition if
703 we do things this way. I say the acorn RISC machine can just
704 fix their compiler. */
705 /* The Acorn RISC machine's compiler can put out locals that don't
706 start with "234=" or "(3,4)=", so assume anything other than the
707 deftypes we know how to handle is a local. */
708 if (!strchr ("cfFGpPrStTvVXCR", *p
))
710 if (isdigit (*p
) || *p
== '(' || *p
== '-')
719 /* c is a special case, not followed by a type-number.
720 SYMBOL:c=iVALUE for an integer constant symbol.
721 SYMBOL:c=rVALUE for a floating constant symbol.
722 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
723 e.g. "b:c=e6,0" for "const b = blob1"
724 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
727 SYMBOL_CLASS (sym
) = LOC_CONST
;
728 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
729 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
730 add_symbol_to_list (sym
, &file_symbols
);
741 /* FIXME-if-picky-about-floating-accuracy: Should be using
742 target arithmetic to get the value. real.c in GCC
743 probably has the necessary code. */
745 /* FIXME: lookup_fundamental_type is a hack. We should be
746 creating a type especially for the type of float constants.
747 Problem is, what type should it be?
749 Also, what should the name of this type be? Should we
750 be using 'S' constants (see stabs.texinfo) instead? */
752 SYMBOL_TYPE (sym
) = lookup_fundamental_type (objfile
,
755 obstack_alloc (&objfile
->objfile_obstack
,
756 TYPE_LENGTH (SYMBOL_TYPE (sym
)));
757 store_typed_floating (dbl_valu
, SYMBOL_TYPE (sym
), d
);
758 SYMBOL_VALUE_BYTES (sym
) = dbl_valu
;
759 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
764 /* Defining integer constants this way is kind of silly,
765 since 'e' constants allows the compiler to give not
766 only the value, but the type as well. C has at least
767 int, long, unsigned int, and long long as constant
768 types; other languages probably should have at least
769 unsigned as well as signed constants. */
771 /* We just need one int constant type for all objfiles.
772 It doesn't depend on languages or anything (arguably its
773 name should be a language-specific name for a type of
774 that size, but I'm inclined to say that if the compiler
775 wants a nice name for the type, it can use 'e'). */
776 static struct type
*int_const_type
;
778 /* Yes, this is as long as a *host* int. That is because we
780 if (int_const_type
== NULL
)
782 init_type (TYPE_CODE_INT
,
783 sizeof (int) * HOST_CHAR_BIT
/ TARGET_CHAR_BIT
, 0,
785 (struct objfile
*) NULL
);
786 SYMBOL_TYPE (sym
) = int_const_type
;
787 SYMBOL_VALUE (sym
) = atoi (p
);
788 SYMBOL_CLASS (sym
) = LOC_CONST
;
792 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
793 can be represented as integral.
794 e.g. "b:c=e6,0" for "const b = blob1"
795 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
797 SYMBOL_CLASS (sym
) = LOC_CONST
;
798 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
802 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
807 /* If the value is too big to fit in an int (perhaps because
808 it is unsigned), or something like that, we silently get
809 a bogus value. The type and everything else about it is
810 correct. Ideally, we should be using whatever we have
811 available for parsing unsigned and long long values,
813 SYMBOL_VALUE (sym
) = atoi (p
);
818 SYMBOL_CLASS (sym
) = LOC_CONST
;
819 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
822 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
823 add_symbol_to_list (sym
, &file_symbols
);
827 /* The name of a caught exception. */
828 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
829 SYMBOL_CLASS (sym
) = LOC_LABEL
;
830 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
831 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
832 add_symbol_to_list (sym
, &local_symbols
);
836 /* A static function definition. */
837 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
838 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
839 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
840 add_symbol_to_list (sym
, &file_symbols
);
841 /* fall into process_function_types. */
843 process_function_types
:
844 /* Function result types are described as the result type in stabs.
845 We need to convert this to the function-returning-type-X type
846 in GDB. E.g. "int" is converted to "function returning int". */
847 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_FUNC
)
848 SYMBOL_TYPE (sym
) = lookup_function_type (SYMBOL_TYPE (sym
));
850 /* All functions in C++ have prototypes. Stabs does not offer an
851 explicit way to identify prototyped or unprototyped functions,
852 but both GCC and Sun CC emit stabs for the "call-as" type rather
853 than the "declared-as" type for unprototyped functions, so
854 we treat all functions as if they were prototyped. This is used
855 primarily for promotion when calling the function from GDB. */
856 TYPE_FLAGS (SYMBOL_TYPE (sym
)) |= TYPE_FLAG_PROTOTYPED
;
858 /* fall into process_prototype_types */
860 process_prototype_types
:
861 /* Sun acc puts declared types of arguments here. */
864 struct type
*ftype
= SYMBOL_TYPE (sym
);
869 /* Obtain a worst case guess for the number of arguments
870 by counting the semicolons. */
877 /* Allocate parameter information fields and fill them in. */
878 TYPE_FIELDS (ftype
) = (struct field
*)
879 TYPE_ALLOC (ftype
, nsemi
* sizeof (struct field
));
884 /* A type number of zero indicates the start of varargs.
885 FIXME: GDB currently ignores vararg functions. */
886 if (p
[0] == '0' && p
[1] == '\0')
888 ptype
= read_type (&p
, objfile
);
890 /* The Sun compilers mark integer arguments, which should
891 be promoted to the width of the calling conventions, with
892 a type which references itself. This type is turned into
893 a TYPE_CODE_VOID type by read_type, and we have to turn
894 it back into builtin_type_int here.
895 FIXME: Do we need a new builtin_type_promoted_int_arg ? */
896 if (TYPE_CODE (ptype
) == TYPE_CODE_VOID
)
897 ptype
= builtin_type_int
;
898 TYPE_FIELD_TYPE (ftype
, nparams
) = ptype
;
899 TYPE_FIELD_ARTIFICIAL (ftype
, nparams
++) = 0;
901 TYPE_NFIELDS (ftype
) = nparams
;
902 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
907 /* A global function definition. */
908 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
909 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
910 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
911 add_symbol_to_list (sym
, &global_symbols
);
912 goto process_function_types
;
915 /* For a class G (global) symbol, it appears that the
916 value is not correct. It is necessary to search for the
917 corresponding linker definition to find the value.
918 These definitions appear at the end of the namelist. */
919 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
920 SYMBOL_CLASS (sym
) = LOC_STATIC
;
921 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
922 /* Don't add symbol references to global_sym_chain.
923 Symbol references don't have valid names and wont't match up with
924 minimal symbols when the global_sym_chain is relocated.
925 We'll fixup symbol references when we fixup the defining symbol. */
926 if (DEPRECATED_SYMBOL_NAME (sym
) && DEPRECATED_SYMBOL_NAME (sym
)[0] != '#')
928 i
= hashname (DEPRECATED_SYMBOL_NAME (sym
));
929 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
930 global_sym_chain
[i
] = sym
;
932 add_symbol_to_list (sym
, &global_symbols
);
935 /* This case is faked by a conditional above,
936 when there is no code letter in the dbx data.
937 Dbx data never actually contains 'l'. */
940 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
941 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
942 SYMBOL_VALUE (sym
) = valu
;
943 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
944 add_symbol_to_list (sym
, &local_symbols
);
949 /* pF is a two-letter code that means a function parameter in Fortran.
950 The type-number specifies the type of the return value.
951 Translate it into a pointer-to-function type. */
955 = lookup_pointer_type
956 (lookup_function_type (read_type (&p
, objfile
)));
959 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
961 SYMBOL_CLASS (sym
) = LOC_ARG
;
962 SYMBOL_VALUE (sym
) = valu
;
963 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
964 add_symbol_to_list (sym
, &local_symbols
);
966 if (gdbarch_byte_order (current_gdbarch
) != BFD_ENDIAN_BIG
)
968 /* On little-endian machines, this crud is never necessary,
969 and, if the extra bytes contain garbage, is harmful. */
973 /* If it's gcc-compiled, if it says `short', believe it. */
974 if (processing_gcc_compilation
|| BELIEVE_PCC_PROMOTION
)
977 if (!BELIEVE_PCC_PROMOTION
)
979 /* This is the signed type which arguments get promoted to. */
980 static struct type
*pcc_promotion_type
;
981 /* This is the unsigned type which arguments get promoted to. */
982 static struct type
*pcc_unsigned_promotion_type
;
984 /* Call it "int" because this is mainly C lossage. */
985 if (pcc_promotion_type
== NULL
)
987 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
990 if (pcc_unsigned_promotion_type
== NULL
)
991 pcc_unsigned_promotion_type
=
992 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
993 TYPE_FLAG_UNSIGNED
, "unsigned int", NULL
);
995 /* If PCC says a parameter is a short or a char, it is
997 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) < TYPE_LENGTH (pcc_promotion_type
)
998 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_INT
)
1001 TYPE_UNSIGNED (SYMBOL_TYPE (sym
))
1002 ? pcc_unsigned_promotion_type
1003 : pcc_promotion_type
;
1009 /* acc seems to use P to declare the prototypes of functions that
1010 are referenced by this file. gdb is not prepared to deal
1011 with this extra information. FIXME, it ought to. */
1014 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1015 goto process_prototype_types
;
1020 /* Parameter which is in a register. */
1021 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1022 SYMBOL_CLASS (sym
) = LOC_REGPARM
;
1023 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
1024 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1025 + gdbarch_num_pseudo_regs (current_gdbarch
))
1027 reg_value_complaint (SYMBOL_VALUE (sym
),
1028 gdbarch_num_regs (current_gdbarch
)
1029 + gdbarch_num_pseudo_regs (current_gdbarch
),
1030 SYMBOL_PRINT_NAME (sym
));
1031 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
1033 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1034 add_symbol_to_list (sym
, &local_symbols
);
1038 /* Register variable (either global or local). */
1039 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1040 SYMBOL_CLASS (sym
) = LOC_REGISTER
;
1041 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
1042 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1043 + gdbarch_num_pseudo_regs (current_gdbarch
))
1045 reg_value_complaint (SYMBOL_VALUE (sym
),
1046 gdbarch_num_regs (current_gdbarch
)
1047 + gdbarch_num_pseudo_regs (current_gdbarch
),
1048 SYMBOL_PRINT_NAME (sym
));
1049 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
1051 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1052 if (within_function
)
1054 /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
1055 the same name to represent an argument passed in a
1056 register. GCC uses 'P' for the same case. So if we find
1057 such a symbol pair we combine it into one 'P' symbol.
1058 For Sun cc we need to do this regardless of
1059 stabs_argument_has_addr, because the compiler puts out
1060 the 'p' symbol even if it never saves the argument onto
1063 On most machines, we want to preserve both symbols, so
1064 that we can still get information about what is going on
1065 with the stack (VAX for computing args_printed, using
1066 stack slots instead of saved registers in backtraces,
1069 Note that this code illegally combines
1070 main(argc) struct foo argc; { register struct foo argc; }
1071 but this case is considered pathological and causes a warning
1072 from a decent compiler. */
1075 && local_symbols
->nsyms
> 0
1076 && gdbarch_stabs_argument_has_addr (current_gdbarch
,
1079 struct symbol
*prev_sym
;
1080 prev_sym
= local_symbols
->symbol
[local_symbols
->nsyms
- 1];
1081 if ((SYMBOL_CLASS (prev_sym
) == LOC_REF_ARG
1082 || SYMBOL_CLASS (prev_sym
) == LOC_ARG
)
1083 && strcmp (DEPRECATED_SYMBOL_NAME (prev_sym
),
1084 DEPRECATED_SYMBOL_NAME (sym
)) == 0)
1086 SYMBOL_CLASS (prev_sym
) = LOC_REGPARM
;
1087 /* Use the type from the LOC_REGISTER; that is the type
1088 that is actually in that register. */
1089 SYMBOL_TYPE (prev_sym
) = SYMBOL_TYPE (sym
);
1090 SYMBOL_VALUE (prev_sym
) = SYMBOL_VALUE (sym
);
1095 add_symbol_to_list (sym
, &local_symbols
);
1098 add_symbol_to_list (sym
, &file_symbols
);
1102 /* Static symbol at top level of file */
1103 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1104 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1105 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1106 #ifdef STATIC_TRANSFORM_NAME
1107 if (IS_STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
)))
1109 struct minimal_symbol
*msym
;
1110 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1113 DEPRECATED_SYMBOL_NAME (sym
) = STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
));
1114 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1118 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1119 add_symbol_to_list (sym
, &file_symbols
);
1123 /* In Ada, there is no distinction between typedef and non-typedef;
1124 any type declaration implicitly has the equivalent of a typedef,
1125 and thus 't' is in fact equivalent to 'Tt'.
1127 Therefore, for Ada units, we check the character immediately
1128 before the 't', and if we do not find a 'T', then make sure to
1129 create the associated symbol in the STRUCT_DOMAIN ('t' definitions
1130 will be stored in the VAR_DOMAIN). If the symbol was indeed
1131 defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
1132 elsewhere, so we don't need to take care of that.
1134 This is important to do, because of forward references:
1135 The cleanup of undefined types stored in undef_types only uses
1136 STRUCT_DOMAIN symbols to perform the replacement. */
1137 synonym
= (SYMBOL_LANGUAGE (sym
) == language_ada
&& p
[-2] != 'T');
1140 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1142 /* For a nameless type, we don't want a create a symbol, thus we
1143 did not use `sym'. Return without further processing. */
1147 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1148 SYMBOL_VALUE (sym
) = valu
;
1149 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1150 /* C++ vagaries: we may have a type which is derived from
1151 a base type which did not have its name defined when the
1152 derived class was output. We fill in the derived class's
1153 base part member's name here in that case. */
1154 if (TYPE_NAME (SYMBOL_TYPE (sym
)) != NULL
)
1155 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_STRUCT
1156 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_UNION
)
1157 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)))
1160 for (j
= TYPE_N_BASECLASSES (SYMBOL_TYPE (sym
)) - 1; j
>= 0; j
--)
1161 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) == 0)
1162 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym
), j
) =
1163 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym
), j
));
1166 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == NULL
)
1168 /* gcc-2.6 or later (when using -fvtable-thunks)
1169 emits a unique named type for a vtable entry.
1170 Some gdb code depends on that specific name. */
1171 extern const char vtbl_ptr_name
[];
1173 if ((TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_PTR
1174 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), vtbl_ptr_name
))
1175 || TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_FUNC
)
1177 /* If we are giving a name to a type such as "pointer to
1178 foo" or "function returning foo", we better not set
1179 the TYPE_NAME. If the program contains "typedef char
1180 *caddr_t;", we don't want all variables of type char
1181 * to print as caddr_t. This is not just a
1182 consequence of GDB's type management; PCC and GCC (at
1183 least through version 2.4) both output variables of
1184 either type char * or caddr_t with the type number
1185 defined in the 't' symbol for caddr_t. If a future
1186 compiler cleans this up it GDB is not ready for it
1187 yet, but if it becomes ready we somehow need to
1188 disable this check (without breaking the PCC/GCC2.4
1193 Fortunately, this check seems not to be necessary
1194 for anything except pointers or functions. */
1195 /* ezannoni: 2000-10-26. This seems to apply for
1196 versions of gcc older than 2.8. This was the original
1197 problem: with the following code gdb would tell that
1198 the type for name1 is caddr_t, and func is char()
1199 typedef char *caddr_t;
1211 /* Pascal accepts names for pointer types. */
1212 if (current_subfile
->language
== language_pascal
)
1214 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1218 TYPE_NAME (SYMBOL_TYPE (sym
)) = DEPRECATED_SYMBOL_NAME (sym
);
1221 add_symbol_to_list (sym
, &file_symbols
);
1225 /* Create the STRUCT_DOMAIN clone. */
1226 struct symbol
*struct_sym
= (struct symbol
*)
1227 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1230 SYMBOL_CLASS (struct_sym
) = LOC_TYPEDEF
;
1231 SYMBOL_VALUE (struct_sym
) = valu
;
1232 SYMBOL_DOMAIN (struct_sym
) = STRUCT_DOMAIN
;
1233 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1234 TYPE_NAME (SYMBOL_TYPE (sym
))
1235 = obconcat (&objfile
->objfile_obstack
, "", "",
1236 DEPRECATED_SYMBOL_NAME (sym
));
1237 add_symbol_to_list (struct_sym
, &file_symbols
);
1243 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1244 by 't' which means we are typedef'ing it as well. */
1245 synonym
= *p
== 't';
1250 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1252 /* For a nameless type, we don't want a create a symbol, thus we
1253 did not use `sym'. Return without further processing. */
1257 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
1258 SYMBOL_VALUE (sym
) = valu
;
1259 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
1260 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym
)) == 0)
1261 TYPE_TAG_NAME (SYMBOL_TYPE (sym
))
1262 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1263 add_symbol_to_list (sym
, &file_symbols
);
1267 /* Clone the sym and then modify it. */
1268 struct symbol
*typedef_sym
= (struct symbol
*)
1269 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
1270 *typedef_sym
= *sym
;
1271 SYMBOL_CLASS (typedef_sym
) = LOC_TYPEDEF
;
1272 SYMBOL_VALUE (typedef_sym
) = valu
;
1273 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
1274 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
1275 TYPE_NAME (SYMBOL_TYPE (sym
))
1276 = obconcat (&objfile
->objfile_obstack
, "", "", DEPRECATED_SYMBOL_NAME (sym
));
1277 add_symbol_to_list (typedef_sym
, &file_symbols
);
1282 /* Static symbol of local scope */
1283 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1284 SYMBOL_CLASS (sym
) = LOC_STATIC
;
1285 SYMBOL_VALUE_ADDRESS (sym
) = valu
;
1286 #ifdef STATIC_TRANSFORM_NAME
1287 if (IS_STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
)))
1289 struct minimal_symbol
*msym
;
1290 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, objfile
);
1293 DEPRECATED_SYMBOL_NAME (sym
) = STATIC_TRANSFORM_NAME (DEPRECATED_SYMBOL_NAME (sym
));
1294 SYMBOL_VALUE_ADDRESS (sym
) = SYMBOL_VALUE_ADDRESS (msym
);
1298 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1299 add_symbol_to_list (sym
, &local_symbols
);
1303 /* Reference parameter */
1304 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1305 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1306 SYMBOL_VALUE (sym
) = valu
;
1307 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1308 add_symbol_to_list (sym
, &local_symbols
);
1312 /* Reference parameter which is in a register. */
1313 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1314 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1315 SYMBOL_VALUE (sym
) = STAB_REG_TO_REGNUM (valu
);
1316 if (SYMBOL_VALUE (sym
) >= gdbarch_num_regs (current_gdbarch
)
1317 + gdbarch_num_pseudo_regs (current_gdbarch
))
1319 reg_value_complaint (SYMBOL_VALUE (sym
),
1320 gdbarch_num_regs (current_gdbarch
)
1321 + gdbarch_num_pseudo_regs (current_gdbarch
),
1322 SYMBOL_PRINT_NAME (sym
));
1323 SYMBOL_VALUE (sym
) = SP_REGNUM
; /* Known safe, though useless */
1325 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1326 add_symbol_to_list (sym
, &local_symbols
);
1330 /* This is used by Sun FORTRAN for "function result value".
1331 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1332 that Pascal uses it too, but when I tried it Pascal used
1333 "x:3" (local symbol) instead. */
1334 SYMBOL_TYPE (sym
) = read_type (&p
, objfile
);
1335 SYMBOL_CLASS (sym
) = LOC_LOCAL
;
1336 SYMBOL_VALUE (sym
) = valu
;
1337 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1338 add_symbol_to_list (sym
, &local_symbols
);
1342 SYMBOL_TYPE (sym
) = error_type (&p
, objfile
);
1343 SYMBOL_CLASS (sym
) = LOC_CONST
;
1344 SYMBOL_VALUE (sym
) = 0;
1345 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1346 add_symbol_to_list (sym
, &file_symbols
);
1350 /* Some systems pass variables of certain types by reference instead
1351 of by value, i.e. they will pass the address of a structure (in a
1352 register or on the stack) instead of the structure itself. */
1354 if (gdbarch_stabs_argument_has_addr (current_gdbarch
, SYMBOL_TYPE (sym
))
1355 && (SYMBOL_CLASS (sym
) == LOC_REGPARM
|| SYMBOL_CLASS (sym
) == LOC_ARG
))
1357 /* We have to convert LOC_REGPARM to LOC_REGPARM_ADDR (for
1358 variables passed in a register). */
1359 if (SYMBOL_CLASS (sym
) == LOC_REGPARM
)
1360 SYMBOL_CLASS (sym
) = LOC_REGPARM_ADDR
;
1361 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
1362 and subsequent arguments on SPARC, for example). */
1363 else if (SYMBOL_CLASS (sym
) == LOC_ARG
)
1364 SYMBOL_CLASS (sym
) = LOC_REF_ARG
;
1370 /* Skip rest of this symbol and return an error type.
1372 General notes on error recovery: error_type always skips to the
1373 end of the symbol (modulo cretinous dbx symbol name continuation).
1374 Thus code like this:
1376 if (*(*pp)++ != ';')
1377 return error_type (pp, objfile);
1379 is wrong because if *pp starts out pointing at '\0' (typically as the
1380 result of an earlier error), it will be incremented to point to the
1381 start of the next symbol, which might produce strange results, at least
1382 if you run off the end of the string table. Instead use
1385 return error_type (pp, objfile);
1391 foo = error_type (pp, objfile);
1395 And in case it isn't obvious, the point of all this hair is so the compiler
1396 can define new types and new syntaxes, and old versions of the
1397 debugger will be able to read the new symbol tables. */
1399 static struct type
*
1400 error_type (char **pp
, struct objfile
*objfile
)
1402 complaint (&symfile_complaints
, _("couldn't parse type; debugger out of date?"));
1405 /* Skip to end of symbol. */
1406 while (**pp
!= '\0')
1411 /* Check for and handle cretinous dbx symbol name continuation! */
1412 if ((*pp
)[-1] == '\\' || (*pp
)[-1] == '?')
1414 *pp
= next_symbol_text (objfile
);
1421 return (builtin_type_error
);
1425 /* Read type information or a type definition; return the type. Even
1426 though this routine accepts either type information or a type
1427 definition, the distinction is relevant--some parts of stabsread.c
1428 assume that type information starts with a digit, '-', or '(' in
1429 deciding whether to call read_type. */
1431 static struct type
*
1432 read_type (char **pp
, struct objfile
*objfile
)
1434 struct type
*type
= 0;
1437 char type_descriptor
;
1439 /* Size in bits of type if specified by a type attribute, or -1 if
1440 there is no size attribute. */
1443 /* Used to distinguish string and bitstring from char-array and set. */
1446 /* Used to distinguish vector from array. */
1449 /* Read type number if present. The type number may be omitted.
1450 for instance in a two-dimensional array declared with type
1451 "ar1;1;10;ar1;1;10;4". */
1452 if ((**pp
>= '0' && **pp
<= '9')
1456 if (read_type_number (pp
, typenums
) != 0)
1457 return error_type (pp
, objfile
);
1461 /* Type is not being defined here. Either it already
1462 exists, or this is a forward reference to it.
1463 dbx_alloc_type handles both cases. */
1464 type
= dbx_alloc_type (typenums
, objfile
);
1466 /* If this is a forward reference, arrange to complain if it
1467 doesn't get patched up by the time we're done
1469 if (TYPE_CODE (type
) == TYPE_CODE_UNDEF
)
1470 add_undefined_type (type
, typenums
);
1475 /* Type is being defined here. */
1477 Also skip the type descriptor - we get it below with (*pp)[-1]. */
1482 /* 'typenums=' not present, type is anonymous. Read and return
1483 the definition, but don't put it in the type vector. */
1484 typenums
[0] = typenums
[1] = -1;
1489 type_descriptor
= (*pp
)[-1];
1490 switch (type_descriptor
)
1494 enum type_code code
;
1496 /* Used to index through file_symbols. */
1497 struct pending
*ppt
;
1500 /* Name including "struct", etc. */
1504 char *from
, *to
, *p
, *q1
, *q2
;
1506 /* Set the type code according to the following letter. */
1510 code
= TYPE_CODE_STRUCT
;
1513 code
= TYPE_CODE_UNION
;
1516 code
= TYPE_CODE_ENUM
;
1520 /* Complain and keep going, so compilers can invent new
1521 cross-reference types. */
1522 complaint (&symfile_complaints
,
1523 _("Unrecognized cross-reference type `%c'"), (*pp
)[0]);
1524 code
= TYPE_CODE_STRUCT
;
1529 q1
= strchr (*pp
, '<');
1530 p
= strchr (*pp
, ':');
1532 return error_type (pp
, objfile
);
1533 if (q1
&& p
> q1
&& p
[1] == ':')
1535 int nesting_level
= 0;
1536 for (q2
= q1
; *q2
; q2
++)
1540 else if (*q2
== '>')
1542 else if (*q2
== ':' && nesting_level
== 0)
1547 return error_type (pp
, objfile
);
1550 (char *) obstack_alloc (&objfile
->objfile_obstack
, p
- *pp
+ 1);
1552 /* Copy the name. */
1558 /* Set the pointer ahead of the name which we just read, and
1563 /* If this type has already been declared, then reuse the same
1564 type, rather than allocating a new one. This saves some
1567 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
1568 for (i
= 0; i
< ppt
->nsyms
; i
++)
1570 struct symbol
*sym
= ppt
->symbol
[i
];
1572 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
1573 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
1574 && (TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
1575 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), type_name
) == 0)
1577 obstack_free (&objfile
->objfile_obstack
, type_name
);
1578 type
= SYMBOL_TYPE (sym
);
1579 if (typenums
[0] != -1)
1580 *dbx_lookup_type (typenums
) = type
;
1585 /* Didn't find the type to which this refers, so we must
1586 be dealing with a forward reference. Allocate a type
1587 structure for it, and keep track of it so we can
1588 fill in the rest of the fields when we get the full
1590 type
= dbx_alloc_type (typenums
, objfile
);
1591 TYPE_CODE (type
) = code
;
1592 TYPE_TAG_NAME (type
) = type_name
;
1593 INIT_CPLUS_SPECIFIC (type
);
1594 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
1596 add_undefined_type (type
, typenums
);
1600 case '-': /* RS/6000 built-in type */
1614 /* We deal with something like t(1,2)=(3,4)=... which
1615 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
1617 /* Allocate and enter the typedef type first.
1618 This handles recursive types. */
1619 type
= dbx_alloc_type (typenums
, objfile
);
1620 TYPE_CODE (type
) = TYPE_CODE_TYPEDEF
;
1622 struct type
*xtype
= read_type (pp
, objfile
);
1625 /* It's being defined as itself. That means it is "void". */
1626 TYPE_CODE (type
) = TYPE_CODE_VOID
;
1627 TYPE_LENGTH (type
) = 1;
1629 else if (type_size
>= 0 || is_string
)
1631 /* This is the absolute wrong way to construct types. Every
1632 other debug format has found a way around this problem and
1633 the related problems with unnecessarily stubbed types;
1634 someone motivated should attempt to clean up the issue
1635 here as well. Once a type pointed to has been created it
1636 should not be modified.
1638 Well, it's not *absolutely* wrong. Constructing recursive
1639 types (trees, linked lists) necessarily entails modifying
1640 types after creating them. Constructing any loop structure
1641 entails side effects. The Dwarf 2 reader does handle this
1642 more gracefully (it never constructs more than once
1643 instance of a type object, so it doesn't have to copy type
1644 objects wholesale), but it still mutates type objects after
1645 other folks have references to them.
1647 Keep in mind that this circularity/mutation issue shows up
1648 at the source language level, too: C's "incomplete types",
1649 for example. So the proper cleanup, I think, would be to
1650 limit GDB's type smashing to match exactly those required
1651 by the source language. So GDB could have a
1652 "complete_this_type" function, but never create unnecessary
1653 copies of a type otherwise. */
1654 replace_type (type
, xtype
);
1655 TYPE_NAME (type
) = NULL
;
1656 TYPE_TAG_NAME (type
) = NULL
;
1660 TYPE_FLAGS (type
) |= TYPE_FLAG_TARGET_STUB
;
1661 TYPE_TARGET_TYPE (type
) = xtype
;
1666 /* In the following types, we must be sure to overwrite any existing
1667 type that the typenums refer to, rather than allocating a new one
1668 and making the typenums point to the new one. This is because there
1669 may already be pointers to the existing type (if it had been
1670 forward-referenced), and we must change it to a pointer, function,
1671 reference, or whatever, *in-place*. */
1673 case '*': /* Pointer to another type */
1674 type1
= read_type (pp
, objfile
);
1675 type
= make_pointer_type (type1
, dbx_lookup_type (typenums
));
1678 case '&': /* Reference to another type */
1679 type1
= read_type (pp
, objfile
);
1680 type
= make_reference_type (type1
, dbx_lookup_type (typenums
));
1683 case 'f': /* Function returning another type */
1684 type1
= read_type (pp
, objfile
);
1685 type
= make_function_type (type1
, dbx_lookup_type (typenums
));
1688 case 'g': /* Prototyped function. (Sun) */
1690 /* Unresolved questions:
1692 - According to Sun's ``STABS Interface Manual'', for 'f'
1693 and 'F' symbol descriptors, a `0' in the argument type list
1694 indicates a varargs function. But it doesn't say how 'g'
1695 type descriptors represent that info. Someone with access
1696 to Sun's toolchain should try it out.
1698 - According to the comment in define_symbol (search for
1699 `process_prototype_types:'), Sun emits integer arguments as
1700 types which ref themselves --- like `void' types. Do we
1701 have to deal with that here, too? Again, someone with
1702 access to Sun's toolchain should try it out and let us
1705 const char *type_start
= (*pp
) - 1;
1706 struct type
*return_type
= read_type (pp
, objfile
);
1707 struct type
*func_type
1708 = make_function_type (return_type
, dbx_lookup_type (typenums
));
1711 struct type_list
*next
;
1715 while (**pp
&& **pp
!= '#')
1717 struct type
*arg_type
= read_type (pp
, objfile
);
1718 struct type_list
*new = alloca (sizeof (*new));
1719 new->type
= arg_type
;
1720 new->next
= arg_types
;
1728 complaint (&symfile_complaints
,
1729 _("Prototyped function type didn't end arguments with `#':\n%s"),
1733 /* If there is just one argument whose type is `void', then
1734 that's just an empty argument list. */
1736 && ! arg_types
->next
1737 && TYPE_CODE (arg_types
->type
) == TYPE_CODE_VOID
)
1740 TYPE_FIELDS (func_type
)
1741 = (struct field
*) TYPE_ALLOC (func_type
,
1742 num_args
* sizeof (struct field
));
1743 memset (TYPE_FIELDS (func_type
), 0, num_args
* sizeof (struct field
));
1746 struct type_list
*t
;
1748 /* We stuck each argument type onto the front of the list
1749 when we read it, so the list is reversed. Build the
1750 fields array right-to-left. */
1751 for (t
= arg_types
, i
= num_args
- 1; t
; t
= t
->next
, i
--)
1752 TYPE_FIELD_TYPE (func_type
, i
) = t
->type
;
1754 TYPE_NFIELDS (func_type
) = num_args
;
1755 TYPE_FLAGS (func_type
) |= TYPE_FLAG_PROTOTYPED
;
1761 case 'k': /* Const qualifier on some type (Sun) */
1762 type
= read_type (pp
, objfile
);
1763 type
= make_cv_type (1, TYPE_VOLATILE (type
), type
,
1764 dbx_lookup_type (typenums
));
1767 case 'B': /* Volatile qual on some type (Sun) */
1768 type
= read_type (pp
, objfile
);
1769 type
= make_cv_type (TYPE_CONST (type
), 1, type
,
1770 dbx_lookup_type (typenums
));
1774 if (isdigit (**pp
) || **pp
== '(' || **pp
== '-')
1775 { /* Member (class & variable) type */
1776 /* FIXME -- we should be doing smash_to_XXX types here. */
1778 struct type
*domain
= read_type (pp
, objfile
);
1779 struct type
*memtype
;
1782 /* Invalid member type data format. */
1783 return error_type (pp
, objfile
);
1786 memtype
= read_type (pp
, objfile
);
1787 type
= dbx_alloc_type (typenums
, objfile
);
1788 smash_to_memberptr_type (type
, domain
, memtype
);
1791 /* type attribute */
1794 /* Skip to the semicolon. */
1795 while (**pp
!= ';' && **pp
!= '\0')
1798 return error_type (pp
, objfile
);
1800 ++ * pp
; /* Skip the semicolon. */
1804 case 's': /* Size attribute */
1805 type_size
= atoi (attr
+ 1);
1810 case 'S': /* String attribute */
1811 /* FIXME: check to see if following type is array? */
1815 case 'V': /* Vector attribute */
1816 /* FIXME: check to see if following type is array? */
1821 /* Ignore unrecognized type attributes, so future compilers
1822 can invent new ones. */
1830 case '#': /* Method (class & fn) type */
1831 if ((*pp
)[0] == '#')
1833 /* We'll get the parameter types from the name. */
1834 struct type
*return_type
;
1837 return_type
= read_type (pp
, objfile
);
1838 if (*(*pp
)++ != ';')
1839 complaint (&symfile_complaints
,
1840 _("invalid (minimal) member type data format at symtab pos %d."),
1842 type
= allocate_stub_method (return_type
);
1843 if (typenums
[0] != -1)
1844 *dbx_lookup_type (typenums
) = type
;
1848 struct type
*domain
= read_type (pp
, objfile
);
1849 struct type
*return_type
;
1854 /* Invalid member type data format. */
1855 return error_type (pp
, objfile
);
1859 return_type
= read_type (pp
, objfile
);
1860 args
= read_args (pp
, ';', objfile
, &nargs
, &varargs
);
1862 return error_type (pp
, objfile
);
1863 type
= dbx_alloc_type (typenums
, objfile
);
1864 smash_to_method_type (type
, domain
, return_type
, args
,
1869 case 'r': /* Range type */
1870 type
= read_range_type (pp
, typenums
, type_size
, objfile
);
1871 if (typenums
[0] != -1)
1872 *dbx_lookup_type (typenums
) = type
;
1877 /* Sun ACC builtin int type */
1878 type
= read_sun_builtin_type (pp
, typenums
, objfile
);
1879 if (typenums
[0] != -1)
1880 *dbx_lookup_type (typenums
) = type
;
1884 case 'R': /* Sun ACC builtin float type */
1885 type
= read_sun_floating_type (pp
, typenums
, objfile
);
1886 if (typenums
[0] != -1)
1887 *dbx_lookup_type (typenums
) = type
;
1890 case 'e': /* Enumeration type */
1891 type
= dbx_alloc_type (typenums
, objfile
);
1892 type
= read_enum_type (pp
, type
, objfile
);
1893 if (typenums
[0] != -1)
1894 *dbx_lookup_type (typenums
) = type
;
1897 case 's': /* Struct type */
1898 case 'u': /* Union type */
1900 enum type_code type_code
= TYPE_CODE_UNDEF
;
1901 type
= dbx_alloc_type (typenums
, objfile
);
1902 switch (type_descriptor
)
1905 type_code
= TYPE_CODE_STRUCT
;
1908 type_code
= TYPE_CODE_UNION
;
1911 type
= read_struct_type (pp
, type
, type_code
, objfile
);
1915 case 'a': /* Array type */
1917 return error_type (pp
, objfile
);
1920 type
= dbx_alloc_type (typenums
, objfile
);
1921 type
= read_array_type (pp
, type
, objfile
);
1923 TYPE_CODE (type
) = TYPE_CODE_STRING
;
1925 TYPE_FLAGS (type
) |= TYPE_FLAG_VECTOR
;
1928 case 'S': /* Set or bitstring type */
1929 type1
= read_type (pp
, objfile
);
1930 type
= create_set_type ((struct type
*) NULL
, type1
);
1932 TYPE_CODE (type
) = TYPE_CODE_BITSTRING
;
1933 if (typenums
[0] != -1)
1934 *dbx_lookup_type (typenums
) = type
;
1938 --*pp
; /* Go back to the symbol in error */
1939 /* Particularly important if it was \0! */
1940 return error_type (pp
, objfile
);
1945 warning (_("GDB internal error, type is NULL in stabsread.c."));
1946 return error_type (pp
, objfile
);
1949 /* Size specified in a type attribute overrides any other size. */
1950 if (type_size
!= -1)
1951 TYPE_LENGTH (type
) = (type_size
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1956 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
1957 Return the proper type node for a given builtin type number. */
1959 static struct type
*
1960 rs6000_builtin_type (int typenum
)
1962 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
1963 #define NUMBER_RECOGNIZED 34
1964 /* This includes an empty slot for type number -0. */
1965 static struct type
*negative_types
[NUMBER_RECOGNIZED
+ 1];
1966 struct type
*rettype
= NULL
;
1968 if (typenum
>= 0 || typenum
< -NUMBER_RECOGNIZED
)
1970 complaint (&symfile_complaints
, _("Unknown builtin type %d"), typenum
);
1971 return builtin_type_error
;
1973 if (negative_types
[-typenum
] != NULL
)
1974 return negative_types
[-typenum
];
1976 #if TARGET_CHAR_BIT != 8
1977 #error This code wrong for TARGET_CHAR_BIT not 8
1978 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
1979 that if that ever becomes not true, the correct fix will be to
1980 make the size in the struct type to be in bits, not in units of
1987 /* The size of this and all the other types are fixed, defined
1988 by the debugging format. If there is a type called "int" which
1989 is other than 32 bits, then it should use a new negative type
1990 number (or avoid negative type numbers for that case).
1991 See stabs.texinfo. */
1992 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "int", NULL
);
1995 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "char", NULL
);
1998 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "short", NULL
);
2001 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "long", NULL
);
2004 rettype
= init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_UNSIGNED
,
2005 "unsigned char", NULL
);
2008 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "signed char", NULL
);
2011 rettype
= init_type (TYPE_CODE_INT
, 2, TYPE_FLAG_UNSIGNED
,
2012 "unsigned short", NULL
);
2015 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2016 "unsigned int", NULL
);
2019 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2022 rettype
= init_type (TYPE_CODE_INT
, 4, TYPE_FLAG_UNSIGNED
,
2023 "unsigned long", NULL
);
2026 rettype
= init_type (TYPE_CODE_VOID
, 1, 0, "void", NULL
);
2029 /* IEEE single precision (32 bit). */
2030 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "float", NULL
);
2033 /* IEEE double precision (64 bit). */
2034 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "double", NULL
);
2037 /* This is an IEEE double on the RS/6000, and different machines with
2038 different sizes for "long double" should use different negative
2039 type numbers. See stabs.texinfo. */
2040 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "long double", NULL
);
2043 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer", NULL
);
2046 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2050 rettype
= init_type (TYPE_CODE_FLT
, 4, 0, "short real", NULL
);
2053 rettype
= init_type (TYPE_CODE_FLT
, 8, 0, "real", NULL
);
2056 rettype
= init_type (TYPE_CODE_ERROR
, 0, 0, "stringptr", NULL
);
2059 rettype
= init_type (TYPE_CODE_CHAR
, 1, TYPE_FLAG_UNSIGNED
,
2063 rettype
= init_type (TYPE_CODE_BOOL
, 1, TYPE_FLAG_UNSIGNED
,
2067 rettype
= init_type (TYPE_CODE_BOOL
, 2, TYPE_FLAG_UNSIGNED
,
2071 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2075 rettype
= init_type (TYPE_CODE_BOOL
, 4, TYPE_FLAG_UNSIGNED
,
2079 /* Complex type consisting of two IEEE single precision values. */
2080 rettype
= init_type (TYPE_CODE_COMPLEX
, 8, 0, "complex", NULL
);
2081 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 4, 0, "float",
2085 /* Complex type consisting of two IEEE double precision values. */
2086 rettype
= init_type (TYPE_CODE_COMPLEX
, 16, 0, "double complex", NULL
);
2087 TYPE_TARGET_TYPE (rettype
) = init_type (TYPE_CODE_FLT
, 8, 0, "double",
2091 rettype
= init_type (TYPE_CODE_INT
, 1, 0, "integer*1", NULL
);
2094 rettype
= init_type (TYPE_CODE_INT
, 2, 0, "integer*2", NULL
);
2097 rettype
= init_type (TYPE_CODE_INT
, 4, 0, "integer*4", NULL
);
2100 rettype
= init_type (TYPE_CODE_CHAR
, 2, 0, "wchar", NULL
);
2103 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "long long", NULL
);
2106 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2107 "unsigned long long", NULL
);
2110 rettype
= init_type (TYPE_CODE_INT
, 8, TYPE_FLAG_UNSIGNED
,
2114 rettype
= init_type (TYPE_CODE_INT
, 8, 0, "integer*8", NULL
);
2117 negative_types
[-typenum
] = rettype
;
2121 /* This page contains subroutines of read_type. */
2123 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2126 update_method_name_from_physname (char **old_name
, char *physname
)
2130 method_name
= method_name_from_physname (physname
);
2132 if (method_name
== NULL
)
2134 complaint (&symfile_complaints
,
2135 _("Method has bad physname %s\n"), physname
);
2139 if (strcmp (*old_name
, method_name
) != 0)
2142 *old_name
= method_name
;
2145 xfree (method_name
);
2148 /* Read member function stabs info for C++ classes. The form of each member
2151 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2153 An example with two member functions is:
2155 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2157 For the case of overloaded operators, the format is op$::*.funcs, where
2158 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2159 name (such as `+=') and `.' marks the end of the operator name.
2161 Returns 1 for success, 0 for failure. */
2164 read_member_functions (struct field_info
*fip
, char **pp
, struct type
*type
,
2165 struct objfile
*objfile
)
2169 /* Total number of member functions defined in this class. If the class
2170 defines two `f' functions, and one `g' function, then this will have
2172 int total_length
= 0;
2176 struct next_fnfield
*next
;
2177 struct fn_field fn_field
;
2180 struct type
*look_ahead_type
;
2181 struct next_fnfieldlist
*new_fnlist
;
2182 struct next_fnfield
*new_sublist
;
2186 /* Process each list until we find something that is not a member function
2187 or find the end of the functions. */
2191 /* We should be positioned at the start of the function name.
2192 Scan forward to find the first ':' and if it is not the
2193 first of a "::" delimiter, then this is not a member function. */
2205 look_ahead_type
= NULL
;
2208 new_fnlist
= (struct next_fnfieldlist
*)
2209 xmalloc (sizeof (struct next_fnfieldlist
));
2210 make_cleanup (xfree
, new_fnlist
);
2211 memset (new_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2213 if ((*pp
)[0] == 'o' && (*pp
)[1] == 'p' && is_cplus_marker ((*pp
)[2]))
2215 /* This is a completely wierd case. In order to stuff in the
2216 names that might contain colons (the usual name delimiter),
2217 Mike Tiemann defined a different name format which is
2218 signalled if the identifier is "op$". In that case, the
2219 format is "op$::XXXX." where XXXX is the name. This is
2220 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2221 /* This lets the user type "break operator+".
2222 We could just put in "+" as the name, but that wouldn't
2224 static char opname
[32] = "op$";
2225 char *o
= opname
+ 3;
2227 /* Skip past '::'. */
2230 STABS_CONTINUE (pp
, objfile
);
2236 main_fn_name
= savestring (opname
, o
- opname
);
2242 main_fn_name
= savestring (*pp
, p
- *pp
);
2243 /* Skip past '::'. */
2246 new_fnlist
->fn_fieldlist
.name
= main_fn_name
;
2251 (struct next_fnfield
*) xmalloc (sizeof (struct next_fnfield
));
2252 make_cleanup (xfree
, new_sublist
);
2253 memset (new_sublist
, 0, sizeof (struct next_fnfield
));
2255 /* Check for and handle cretinous dbx symbol name continuation! */
2256 if (look_ahead_type
== NULL
)
2259 STABS_CONTINUE (pp
, objfile
);
2261 new_sublist
->fn_field
.type
= read_type (pp
, objfile
);
2264 /* Invalid symtab info for member function. */
2270 /* g++ version 1 kludge */
2271 new_sublist
->fn_field
.type
= look_ahead_type
;
2272 look_ahead_type
= NULL
;
2282 /* If this is just a stub, then we don't have the real name here. */
2284 if (TYPE_STUB (new_sublist
->fn_field
.type
))
2286 if (!TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
))
2287 TYPE_DOMAIN_TYPE (new_sublist
->fn_field
.type
) = type
;
2288 new_sublist
->fn_field
.is_stub
= 1;
2290 new_sublist
->fn_field
.physname
= savestring (*pp
, p
- *pp
);
2293 /* Set this member function's visibility fields. */
2296 case VISIBILITY_PRIVATE
:
2297 new_sublist
->fn_field
.is_private
= 1;
2299 case VISIBILITY_PROTECTED
:
2300 new_sublist
->fn_field
.is_protected
= 1;
2304 STABS_CONTINUE (pp
, objfile
);
2307 case 'A': /* Normal functions. */
2308 new_sublist
->fn_field
.is_const
= 0;
2309 new_sublist
->fn_field
.is_volatile
= 0;
2312 case 'B': /* `const' member functions. */
2313 new_sublist
->fn_field
.is_const
= 1;
2314 new_sublist
->fn_field
.is_volatile
= 0;
2317 case 'C': /* `volatile' member function. */
2318 new_sublist
->fn_field
.is_const
= 0;
2319 new_sublist
->fn_field
.is_volatile
= 1;
2322 case 'D': /* `const volatile' member function. */
2323 new_sublist
->fn_field
.is_const
= 1;
2324 new_sublist
->fn_field
.is_volatile
= 1;
2327 case '*': /* File compiled with g++ version 1 -- no info */
2332 complaint (&symfile_complaints
,
2333 _("const/volatile indicator missing, got '%c'"), **pp
);
2342 /* virtual member function, followed by index.
2343 The sign bit is set to distinguish pointers-to-methods
2344 from virtual function indicies. Since the array is
2345 in words, the quantity must be shifted left by 1
2346 on 16 bit machine, and by 2 on 32 bit machine, forcing
2347 the sign bit out, and usable as a valid index into
2348 the array. Remove the sign bit here. */
2349 new_sublist
->fn_field
.voffset
=
2350 (0x7fffffff & read_huge_number (pp
, ';', &nbits
, 0)) + 2;
2354 STABS_CONTINUE (pp
, objfile
);
2355 if (**pp
== ';' || **pp
== '\0')
2357 /* Must be g++ version 1. */
2358 new_sublist
->fn_field
.fcontext
= 0;
2362 /* Figure out from whence this virtual function came.
2363 It may belong to virtual function table of
2364 one of its baseclasses. */
2365 look_ahead_type
= read_type (pp
, objfile
);
2368 /* g++ version 1 overloaded methods. */
2372 new_sublist
->fn_field
.fcontext
= look_ahead_type
;
2381 look_ahead_type
= NULL
;
2387 /* static member function. */
2389 int slen
= strlen (main_fn_name
);
2391 new_sublist
->fn_field
.voffset
= VOFFSET_STATIC
;
2393 /* For static member functions, we can't tell if they
2394 are stubbed, as they are put out as functions, and not as
2396 GCC v2 emits the fully mangled name if
2397 dbxout.c:flag_minimal_debug is not set, so we have to
2398 detect a fully mangled physname here and set is_stub
2399 accordingly. Fully mangled physnames in v2 start with
2400 the member function name, followed by two underscores.
2401 GCC v3 currently always emits stubbed member functions,
2402 but with fully mangled physnames, which start with _Z. */
2403 if (!(strncmp (new_sublist
->fn_field
.physname
,
2404 main_fn_name
, slen
) == 0
2405 && new_sublist
->fn_field
.physname
[slen
] == '_'
2406 && new_sublist
->fn_field
.physname
[slen
+ 1] == '_'))
2408 new_sublist
->fn_field
.is_stub
= 1;
2415 complaint (&symfile_complaints
,
2416 _("member function type missing, got '%c'"), (*pp
)[-1]);
2417 /* Fall through into normal member function. */
2420 /* normal member function. */
2421 new_sublist
->fn_field
.voffset
= 0;
2422 new_sublist
->fn_field
.fcontext
= 0;
2426 new_sublist
->next
= sublist
;
2427 sublist
= new_sublist
;
2429 STABS_CONTINUE (pp
, objfile
);
2431 while (**pp
!= ';' && **pp
!= '\0');
2434 STABS_CONTINUE (pp
, objfile
);
2436 /* Skip GCC 3.X member functions which are duplicates of the callable
2437 constructor/destructor. */
2438 if (strcmp (main_fn_name
, "__base_ctor") == 0
2439 || strcmp (main_fn_name
, "__base_dtor") == 0
2440 || strcmp (main_fn_name
, "__deleting_dtor") == 0)
2442 xfree (main_fn_name
);
2447 int has_destructor
= 0, has_other
= 0;
2449 struct next_fnfield
*tmp_sublist
;
2451 /* Various versions of GCC emit various mostly-useless
2452 strings in the name field for special member functions.
2454 For stub methods, we need to defer correcting the name
2455 until we are ready to unstub the method, because the current
2456 name string is used by gdb_mangle_name. The only stub methods
2457 of concern here are GNU v2 operators; other methods have their
2458 names correct (see caveat below).
2460 For non-stub methods, in GNU v3, we have a complete physname.
2461 Therefore we can safely correct the name now. This primarily
2462 affects constructors and destructors, whose name will be
2463 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
2464 operators will also have incorrect names; for instance,
2465 "operator int" will be named "operator i" (i.e. the type is
2468 For non-stub methods in GNU v2, we have no easy way to
2469 know if we have a complete physname or not. For most
2470 methods the result depends on the platform (if CPLUS_MARKER
2471 can be `$' or `.', it will use minimal debug information, or
2472 otherwise the full physname will be included).
2474 Rather than dealing with this, we take a different approach.
2475 For v3 mangled names, we can use the full physname; for v2,
2476 we use cplus_demangle_opname (which is actually v2 specific),
2477 because the only interesting names are all operators - once again
2478 barring the caveat below. Skip this process if any method in the
2479 group is a stub, to prevent our fouling up the workings of
2482 The caveat: GCC 2.95.x (and earlier?) put constructors and
2483 destructors in the same method group. We need to split this
2484 into two groups, because they should have different names.
2485 So for each method group we check whether it contains both
2486 routines whose physname appears to be a destructor (the physnames
2487 for and destructors are always provided, due to quirks in v2
2488 mangling) and routines whose physname does not appear to be a
2489 destructor. If so then we break up the list into two halves.
2490 Even if the constructors and destructors aren't in the same group
2491 the destructor will still lack the leading tilde, so that also
2494 So, to summarize what we expect and handle here:
2496 Given Given Real Real Action
2497 method name physname physname method name
2499 __opi [none] __opi__3Foo operator int opname
2501 Foo _._3Foo _._3Foo ~Foo separate and
2503 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
2504 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
2507 tmp_sublist
= sublist
;
2508 while (tmp_sublist
!= NULL
)
2510 if (tmp_sublist
->fn_field
.is_stub
)
2512 if (tmp_sublist
->fn_field
.physname
[0] == '_'
2513 && tmp_sublist
->fn_field
.physname
[1] == 'Z')
2516 if (is_destructor_name (tmp_sublist
->fn_field
.physname
))
2521 tmp_sublist
= tmp_sublist
->next
;
2524 if (has_destructor
&& has_other
)
2526 struct next_fnfieldlist
*destr_fnlist
;
2527 struct next_fnfield
*last_sublist
;
2529 /* Create a new fn_fieldlist for the destructors. */
2531 destr_fnlist
= (struct next_fnfieldlist
*)
2532 xmalloc (sizeof (struct next_fnfieldlist
));
2533 make_cleanup (xfree
, destr_fnlist
);
2534 memset (destr_fnlist
, 0, sizeof (struct next_fnfieldlist
));
2535 destr_fnlist
->fn_fieldlist
.name
2536 = obconcat (&objfile
->objfile_obstack
, "", "~",
2537 new_fnlist
->fn_fieldlist
.name
);
2539 destr_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2540 obstack_alloc (&objfile
->objfile_obstack
,
2541 sizeof (struct fn_field
) * has_destructor
);
2542 memset (destr_fnlist
->fn_fieldlist
.fn_fields
, 0,
2543 sizeof (struct fn_field
) * has_destructor
);
2544 tmp_sublist
= sublist
;
2545 last_sublist
= NULL
;
2547 while (tmp_sublist
!= NULL
)
2549 if (!is_destructor_name (tmp_sublist
->fn_field
.physname
))
2551 tmp_sublist
= tmp_sublist
->next
;
2555 destr_fnlist
->fn_fieldlist
.fn_fields
[i
++]
2556 = tmp_sublist
->fn_field
;
2558 last_sublist
->next
= tmp_sublist
->next
;
2560 sublist
= tmp_sublist
->next
;
2561 last_sublist
= tmp_sublist
;
2562 tmp_sublist
= tmp_sublist
->next
;
2565 destr_fnlist
->fn_fieldlist
.length
= has_destructor
;
2566 destr_fnlist
->next
= fip
->fnlist
;
2567 fip
->fnlist
= destr_fnlist
;
2569 total_length
+= has_destructor
;
2570 length
-= has_destructor
;
2574 /* v3 mangling prevents the use of abbreviated physnames,
2575 so we can do this here. There are stubbed methods in v3
2577 - in -gstabs instead of -gstabs+
2578 - or for static methods, which are output as a function type
2579 instead of a method type. */
2581 update_method_name_from_physname (&new_fnlist
->fn_fieldlist
.name
,
2582 sublist
->fn_field
.physname
);
2584 else if (has_destructor
&& new_fnlist
->fn_fieldlist
.name
[0] != '~')
2586 new_fnlist
->fn_fieldlist
.name
=
2587 concat ("~", main_fn_name
, (char *)NULL
);
2588 xfree (main_fn_name
);
2592 char dem_opname
[256];
2594 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2595 dem_opname
, DMGL_ANSI
);
2597 ret
= cplus_demangle_opname (new_fnlist
->fn_fieldlist
.name
,
2600 new_fnlist
->fn_fieldlist
.name
2601 = obsavestring (dem_opname
, strlen (dem_opname
),
2602 &objfile
->objfile_obstack
);
2605 new_fnlist
->fn_fieldlist
.fn_fields
= (struct fn_field
*)
2606 obstack_alloc (&objfile
->objfile_obstack
,
2607 sizeof (struct fn_field
) * length
);
2608 memset (new_fnlist
->fn_fieldlist
.fn_fields
, 0,
2609 sizeof (struct fn_field
) * length
);
2610 for (i
= length
; (i
--, sublist
); sublist
= sublist
->next
)
2612 new_fnlist
->fn_fieldlist
.fn_fields
[i
] = sublist
->fn_field
;
2615 new_fnlist
->fn_fieldlist
.length
= length
;
2616 new_fnlist
->next
= fip
->fnlist
;
2617 fip
->fnlist
= new_fnlist
;
2619 total_length
+= length
;
2625 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2626 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
2627 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * nfn_fields
);
2628 memset (TYPE_FN_FIELDLISTS (type
), 0,
2629 sizeof (struct fn_fieldlist
) * nfn_fields
);
2630 TYPE_NFN_FIELDS (type
) = nfn_fields
;
2631 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
2637 /* Special GNU C++ name.
2639 Returns 1 for success, 0 for failure. "failure" means that we can't
2640 keep parsing and it's time for error_type(). */
2643 read_cpp_abbrev (struct field_info
*fip
, char **pp
, struct type
*type
,
2644 struct objfile
*objfile
)
2649 struct type
*context
;
2659 /* At this point, *pp points to something like "22:23=*22...",
2660 where the type number before the ':' is the "context" and
2661 everything after is a regular type definition. Lookup the
2662 type, find it's name, and construct the field name. */
2664 context
= read_type (pp
, objfile
);
2668 case 'f': /* $vf -- a virtual function table pointer */
2669 name
= type_name_no_tag (context
);
2674 fip
->list
->field
.name
=
2675 obconcat (&objfile
->objfile_obstack
, vptr_name
, name
, "");
2678 case 'b': /* $vb -- a virtual bsomethingorother */
2679 name
= type_name_no_tag (context
);
2682 complaint (&symfile_complaints
,
2683 _("C++ abbreviated type name unknown at symtab pos %d"),
2687 fip
->list
->field
.name
=
2688 obconcat (&objfile
->objfile_obstack
, vb_name
, name
, "");
2692 invalid_cpp_abbrev_complaint (*pp
);
2693 fip
->list
->field
.name
=
2694 obconcat (&objfile
->objfile_obstack
,
2695 "INVALID_CPLUSPLUS_ABBREV", "", "");
2699 /* At this point, *pp points to the ':'. Skip it and read the
2705 invalid_cpp_abbrev_complaint (*pp
);
2708 fip
->list
->field
.type
= read_type (pp
, objfile
);
2710 (*pp
)++; /* Skip the comma. */
2716 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
,
2721 /* This field is unpacked. */
2722 FIELD_BITSIZE (fip
->list
->field
) = 0;
2723 fip
->list
->visibility
= VISIBILITY_PRIVATE
;
2727 invalid_cpp_abbrev_complaint (*pp
);
2728 /* We have no idea what syntax an unrecognized abbrev would have, so
2729 better return 0. If we returned 1, we would need to at least advance
2730 *pp to avoid an infinite loop. */
2737 read_one_struct_field (struct field_info
*fip
, char **pp
, char *p
,
2738 struct type
*type
, struct objfile
*objfile
)
2740 fip
->list
->field
.name
=
2741 obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
2744 /* This means we have a visibility for a field coming. */
2748 fip
->list
->visibility
= *(*pp
)++;
2752 /* normal dbx-style format, no explicit visibility */
2753 fip
->list
->visibility
= VISIBILITY_PUBLIC
;
2756 fip
->list
->field
.type
= read_type (pp
, objfile
);
2761 /* Possible future hook for nested types. */
2764 fip
->list
->field
.bitpos
= (long) -2; /* nested type */
2774 /* Static class member. */
2775 SET_FIELD_PHYSNAME (fip
->list
->field
, savestring (*pp
, p
- *pp
));
2779 else if (**pp
!= ',')
2781 /* Bad structure-type format. */
2782 stabs_general_complaint ("bad structure-type format");
2786 (*pp
)++; /* Skip the comma. */
2790 FIELD_BITPOS (fip
->list
->field
) = read_huge_number (pp
, ',', &nbits
, 0);
2793 stabs_general_complaint ("bad structure-type format");
2796 FIELD_BITSIZE (fip
->list
->field
) = read_huge_number (pp
, ';', &nbits
, 0);
2799 stabs_general_complaint ("bad structure-type format");
2804 if (FIELD_BITPOS (fip
->list
->field
) == 0
2805 && FIELD_BITSIZE (fip
->list
->field
) == 0)
2807 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
2808 it is a field which has been optimized out. The correct stab for
2809 this case is to use VISIBILITY_IGNORE, but that is a recent
2810 invention. (2) It is a 0-size array. For example
2811 union { int num; char str[0]; } foo. Printing _("<no value>" for
2812 str in "p foo" is OK, since foo.str (and thus foo.str[3])
2813 will continue to work, and a 0-size array as a whole doesn't
2814 have any contents to print.
2816 I suspect this probably could also happen with gcc -gstabs (not
2817 -gstabs+) for static fields, and perhaps other C++ extensions.
2818 Hopefully few people use -gstabs with gdb, since it is intended
2819 for dbx compatibility. */
2821 /* Ignore this field. */
2822 fip
->list
->visibility
= VISIBILITY_IGNORE
;
2826 /* Detect an unpacked field and mark it as such.
2827 dbx gives a bit size for all fields.
2828 Note that forward refs cannot be packed,
2829 and treat enums as if they had the width of ints. */
2831 struct type
*field_type
= check_typedef (FIELD_TYPE (fip
->list
->field
));
2833 if (TYPE_CODE (field_type
) != TYPE_CODE_INT
2834 && TYPE_CODE (field_type
) != TYPE_CODE_RANGE
2835 && TYPE_CODE (field_type
) != TYPE_CODE_BOOL
2836 && TYPE_CODE (field_type
) != TYPE_CODE_ENUM
)
2838 FIELD_BITSIZE (fip
->list
->field
) = 0;
2840 if ((FIELD_BITSIZE (fip
->list
->field
)
2841 == TARGET_CHAR_BIT
* TYPE_LENGTH (field_type
)
2842 || (TYPE_CODE (field_type
) == TYPE_CODE_ENUM
2843 && FIELD_BITSIZE (fip
->list
->field
) == TARGET_INT_BIT
)
2846 FIELD_BITPOS (fip
->list
->field
) % 8 == 0)
2848 FIELD_BITSIZE (fip
->list
->field
) = 0;
2854 /* Read struct or class data fields. They have the form:
2856 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2858 At the end, we see a semicolon instead of a field.
2860 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2863 The optional VISIBILITY is one of:
2865 '/0' (VISIBILITY_PRIVATE)
2866 '/1' (VISIBILITY_PROTECTED)
2867 '/2' (VISIBILITY_PUBLIC)
2868 '/9' (VISIBILITY_IGNORE)
2870 or nothing, for C style fields with public visibility.
2872 Returns 1 for success, 0 for failure. */
2875 read_struct_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
2876 struct objfile
*objfile
)
2879 struct nextfield
*new;
2881 /* We better set p right now, in case there are no fields at all... */
2885 /* Read each data member type until we find the terminating ';' at the end of
2886 the data member list, or break for some other reason such as finding the
2887 start of the member function list. */
2888 /* Stab string for structure/union does not end with two ';' in
2889 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
2891 while (**pp
!= ';' && **pp
!= '\0')
2893 STABS_CONTINUE (pp
, objfile
);
2894 /* Get space to record the next field's data. */
2895 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
2896 make_cleanup (xfree
, new);
2897 memset (new, 0, sizeof (struct nextfield
));
2898 new->next
= fip
->list
;
2901 /* Get the field name. */
2904 /* If is starts with CPLUS_MARKER it is a special abbreviation,
2905 unless the CPLUS_MARKER is followed by an underscore, in
2906 which case it is just the name of an anonymous type, which we
2907 should handle like any other type name. */
2909 if (is_cplus_marker (p
[0]) && p
[1] != '_')
2911 if (!read_cpp_abbrev (fip
, pp
, type
, objfile
))
2916 /* Look for the ':' that separates the field name from the field
2917 values. Data members are delimited by a single ':', while member
2918 functions are delimited by a pair of ':'s. When we hit the member
2919 functions (if any), terminate scan loop and return. */
2921 while (*p
!= ':' && *p
!= '\0')
2928 /* Check to see if we have hit the member functions yet. */
2933 read_one_struct_field (fip
, pp
, p
, type
, objfile
);
2935 if (p
[0] == ':' && p
[1] == ':')
2937 /* (the deleted) chill the list of fields: the last entry (at
2938 the head) is a partially constructed entry which we now
2940 fip
->list
= fip
->list
->next
;
2945 /* The stabs for C++ derived classes contain baseclass information which
2946 is marked by a '!' character after the total size. This function is
2947 called when we encounter the baseclass marker, and slurps up all the
2948 baseclass information.
2950 Immediately following the '!' marker is the number of base classes that
2951 the class is derived from, followed by information for each base class.
2952 For each base class, there are two visibility specifiers, a bit offset
2953 to the base class information within the derived class, a reference to
2954 the type for the base class, and a terminating semicolon.
2956 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2958 Baseclass information marker __________________|| | | | | | |
2959 Number of baseclasses __________________________| | | | | | |
2960 Visibility specifiers (2) ________________________| | | | | |
2961 Offset in bits from start of class _________________| | | | |
2962 Type number for base class ___________________________| | | |
2963 Visibility specifiers (2) _______________________________| | |
2964 Offset in bits from start of class ________________________| |
2965 Type number of base class ____________________________________|
2967 Return 1 for success, 0 for (error-type-inducing) failure. */
2973 read_baseclasses (struct field_info
*fip
, char **pp
, struct type
*type
,
2974 struct objfile
*objfile
)
2977 struct nextfield
*new;
2985 /* Skip the '!' baseclass information marker. */
2989 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
2992 TYPE_N_BASECLASSES (type
) = read_huge_number (pp
, ',', &nbits
, 0);
2998 /* Some stupid compilers have trouble with the following, so break
2999 it up into simpler expressions. */
3000 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*)
3001 TYPE_ALLOC (type
, B_BYTES (TYPE_N_BASECLASSES (type
)));
3004 int num_bytes
= B_BYTES (TYPE_N_BASECLASSES (type
));
3007 pointer
= (char *) TYPE_ALLOC (type
, num_bytes
);
3008 TYPE_FIELD_VIRTUAL_BITS (type
) = (B_TYPE
*) pointer
;
3012 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), TYPE_N_BASECLASSES (type
));
3014 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
3016 new = (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3017 make_cleanup (xfree
, new);
3018 memset (new, 0, sizeof (struct nextfield
));
3019 new->next
= fip
->list
;
3021 FIELD_BITSIZE (new->field
) = 0; /* this should be an unpacked field! */
3023 STABS_CONTINUE (pp
, objfile
);
3027 /* Nothing to do. */
3030 SET_TYPE_FIELD_VIRTUAL (type
, i
);
3033 /* Unknown character. Complain and treat it as non-virtual. */
3035 complaint (&symfile_complaints
,
3036 _("Unknown virtual character `%c' for baseclass"), **pp
);
3041 new->visibility
= *(*pp
)++;
3042 switch (new->visibility
)
3044 case VISIBILITY_PRIVATE
:
3045 case VISIBILITY_PROTECTED
:
3046 case VISIBILITY_PUBLIC
:
3049 /* Bad visibility format. Complain and treat it as
3052 complaint (&symfile_complaints
,
3053 _("Unknown visibility `%c' for baseclass"),
3055 new->visibility
= VISIBILITY_PUBLIC
;
3062 /* The remaining value is the bit offset of the portion of the object
3063 corresponding to this baseclass. Always zero in the absence of
3064 multiple inheritance. */
3066 FIELD_BITPOS (new->field
) = read_huge_number (pp
, ',', &nbits
, 0);
3071 /* The last piece of baseclass information is the type of the
3072 base class. Read it, and remember it's type name as this
3075 new->field
.type
= read_type (pp
, objfile
);
3076 new->field
.name
= type_name_no_tag (new->field
.type
);
3078 /* skip trailing ';' and bump count of number of fields seen */
3087 /* The tail end of stabs for C++ classes that contain a virtual function
3088 pointer contains a tilde, a %, and a type number.
3089 The type number refers to the base class (possibly this class itself) which
3090 contains the vtable pointer for the current class.
3092 This function is called when we have parsed all the method declarations,
3093 so we can look for the vptr base class info. */
3096 read_tilde_fields (struct field_info
*fip
, char **pp
, struct type
*type
,
3097 struct objfile
*objfile
)
3101 STABS_CONTINUE (pp
, objfile
);
3103 /* If we are positioned at a ';', then skip it. */
3113 if (**pp
== '=' || **pp
== '+' || **pp
== '-')
3115 /* Obsolete flags that used to indicate the presence
3116 of constructors and/or destructors. */
3120 /* Read either a '%' or the final ';'. */
3121 if (*(*pp
)++ == '%')
3123 /* The next number is the type number of the base class
3124 (possibly our own class) which supplies the vtable for
3125 this class. Parse it out, and search that class to find
3126 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
3127 and TYPE_VPTR_FIELDNO. */
3132 t
= read_type (pp
, objfile
);
3134 while (*p
!= '\0' && *p
!= ';')
3140 /* Premature end of symbol. */
3144 TYPE_VPTR_BASETYPE (type
) = t
;
3145 if (type
== t
) /* Our own class provides vtbl ptr */
3147 for (i
= TYPE_NFIELDS (t
) - 1;
3148 i
>= TYPE_N_BASECLASSES (t
);
3151 char *name
= TYPE_FIELD_NAME (t
, i
);
3152 if (!strncmp (name
, vptr_name
, sizeof (vptr_name
) - 2)
3153 && is_cplus_marker (name
[sizeof (vptr_name
) - 2]))
3155 TYPE_VPTR_FIELDNO (type
) = i
;
3159 /* Virtual function table field not found. */
3160 complaint (&symfile_complaints
,
3161 _("virtual function table pointer not found when defining class `%s'"),
3167 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3178 attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
)
3182 for (n
= TYPE_NFN_FIELDS (type
);
3183 fip
->fnlist
!= NULL
;
3184 fip
->fnlist
= fip
->fnlist
->next
)
3186 --n
; /* Circumvent Sun3 compiler bug */
3187 TYPE_FN_FIELDLISTS (type
)[n
] = fip
->fnlist
->fn_fieldlist
;
3192 /* Create the vector of fields, and record how big it is.
3193 We need this info to record proper virtual function table information
3194 for this class's virtual functions. */
3197 attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3198 struct objfile
*objfile
)
3201 int non_public_fields
= 0;
3202 struct nextfield
*scan
;
3204 /* Count up the number of fields that we have, as well as taking note of
3205 whether or not there are any non-public fields, which requires us to
3206 allocate and build the private_field_bits and protected_field_bits
3209 for (scan
= fip
->list
; scan
!= NULL
; scan
= scan
->next
)
3212 if (scan
->visibility
!= VISIBILITY_PUBLIC
)
3214 non_public_fields
++;
3218 /* Now we know how many fields there are, and whether or not there are any
3219 non-public fields. Record the field count, allocate space for the
3220 array of fields, and create blank visibility bitfields if necessary. */
3222 TYPE_NFIELDS (type
) = nfields
;
3223 TYPE_FIELDS (type
) = (struct field
*)
3224 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3225 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3227 if (non_public_fields
)
3229 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3231 TYPE_FIELD_PRIVATE_BITS (type
) =
3232 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3233 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3235 TYPE_FIELD_PROTECTED_BITS (type
) =
3236 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3237 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3239 TYPE_FIELD_IGNORE_BITS (type
) =
3240 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3241 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3244 /* Copy the saved-up fields into the field vector. Start from the head
3245 of the list, adding to the tail of the field array, so that they end
3246 up in the same order in the array in which they were added to the list. */
3248 while (nfields
-- > 0)
3250 TYPE_FIELD (type
, nfields
) = fip
->list
->field
;
3251 switch (fip
->list
->visibility
)
3253 case VISIBILITY_PRIVATE
:
3254 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3257 case VISIBILITY_PROTECTED
:
3258 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3261 case VISIBILITY_IGNORE
:
3262 SET_TYPE_FIELD_IGNORE (type
, nfields
);
3265 case VISIBILITY_PUBLIC
:
3269 /* Unknown visibility. Complain and treat it as public. */
3271 complaint (&symfile_complaints
, _("Unknown visibility `%c' for field"),
3272 fip
->list
->visibility
);
3276 fip
->list
= fip
->list
->next
;
3282 /* Complain that the compiler has emitted more than one definition for the
3283 structure type TYPE. */
3285 complain_about_struct_wipeout (struct type
*type
)
3290 if (TYPE_TAG_NAME (type
))
3292 name
= TYPE_TAG_NAME (type
);
3293 switch (TYPE_CODE (type
))
3295 case TYPE_CODE_STRUCT
: kind
= "struct "; break;
3296 case TYPE_CODE_UNION
: kind
= "union "; break;
3297 case TYPE_CODE_ENUM
: kind
= "enum "; break;
3301 else if (TYPE_NAME (type
))
3303 name
= TYPE_NAME (type
);
3312 complaint (&symfile_complaints
,
3313 _("struct/union type gets multiply defined: %s%s"), kind
, name
);
3317 /* Read the description of a structure (or union type) and return an object
3318 describing the type.
3320 PP points to a character pointer that points to the next unconsumed token
3321 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
3322 *PP will point to "4a:1,0,32;;".
3324 TYPE points to an incomplete type that needs to be filled in.
3326 OBJFILE points to the current objfile from which the stabs information is
3327 being read. (Note that it is redundant in that TYPE also contains a pointer
3328 to this same objfile, so it might be a good idea to eliminate it. FIXME).
3331 static struct type
*
3332 read_struct_type (char **pp
, struct type
*type
, enum type_code type_code
,
3333 struct objfile
*objfile
)
3335 struct cleanup
*back_to
;
3336 struct field_info fi
;
3341 /* When describing struct/union/class types in stabs, G++ always drops
3342 all qualifications from the name. So if you've got:
3343 struct A { ... struct B { ... }; ... };
3344 then G++ will emit stabs for `struct A::B' that call it simply
3345 `struct B'. Obviously, if you've got a real top-level definition for
3346 `struct B', or other nested definitions, this is going to cause
3349 Obviously, GDB can't fix this by itself, but it can at least avoid
3350 scribbling on existing structure type objects when new definitions
3352 if (! (TYPE_CODE (type
) == TYPE_CODE_UNDEF
3353 || TYPE_STUB (type
)))
3355 complain_about_struct_wipeout (type
);
3357 /* It's probably best to return the type unchanged. */
3361 back_to
= make_cleanup (null_cleanup
, 0);
3363 INIT_CPLUS_SPECIFIC (type
);
3364 TYPE_CODE (type
) = type_code
;
3365 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3367 /* First comes the total size in bytes. */
3371 TYPE_LENGTH (type
) = read_huge_number (pp
, 0, &nbits
, 0);
3373 return error_type (pp
, objfile
);
3376 /* Now read the baseclasses, if any, read the regular C struct or C++
3377 class member fields, attach the fields to the type, read the C++
3378 member functions, attach them to the type, and then read any tilde
3379 field (baseclass specifier for the class holding the main vtable). */
3381 if (!read_baseclasses (&fi
, pp
, type
, objfile
)
3382 || !read_struct_fields (&fi
, pp
, type
, objfile
)
3383 || !attach_fields_to_type (&fi
, type
, objfile
)
3384 || !read_member_functions (&fi
, pp
, type
, objfile
)
3385 || !attach_fn_fields_to_type (&fi
, type
)
3386 || !read_tilde_fields (&fi
, pp
, type
, objfile
))
3388 type
= error_type (pp
, objfile
);
3391 do_cleanups (back_to
);
3395 /* Read a definition of an array type,
3396 and create and return a suitable type object.
3397 Also creates a range type which represents the bounds of that
3400 static struct type
*
3401 read_array_type (char **pp
, struct type
*type
,
3402 struct objfile
*objfile
)
3404 struct type
*index_type
, *element_type
, *range_type
;
3409 /* Format of an array type:
3410 "ar<index type>;lower;upper;<array_contents_type>".
3411 OS9000: "arlower,upper;<array_contents_type>".
3413 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3414 for these, produce a type like float[][]. */
3417 index_type
= read_type (pp
, objfile
);
3419 /* Improper format of array type decl. */
3420 return error_type (pp
, objfile
);
3424 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3429 lower
= read_huge_number (pp
, ';', &nbits
, 0);
3432 return error_type (pp
, objfile
);
3434 if (!(**pp
>= '0' && **pp
<= '9') && **pp
!= '-')
3439 upper
= read_huge_number (pp
, ';', &nbits
, 0);
3441 return error_type (pp
, objfile
);
3443 element_type
= read_type (pp
, objfile
);
3452 create_range_type ((struct type
*) NULL
, index_type
, lower
, upper
);
3453 type
= create_array_type (type
, element_type
, range_type
);
3459 /* Read a definition of an enumeration type,
3460 and create and return a suitable type object.
3461 Also defines the symbols that represent the values of the type. */
3463 static struct type
*
3464 read_enum_type (char **pp
, struct type
*type
,
3465 struct objfile
*objfile
)
3472 struct pending
**symlist
;
3473 struct pending
*osyms
, *syms
;
3476 int unsigned_enum
= 1;
3479 /* FIXME! The stabs produced by Sun CC merrily define things that ought
3480 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
3481 to do? For now, force all enum values to file scope. */
3482 if (within_function
)
3483 symlist
= &local_symbols
;
3486 symlist
= &file_symbols
;
3488 o_nsyms
= osyms
? osyms
->nsyms
: 0;
3490 /* The aix4 compiler emits an extra field before the enum members;
3491 my guess is it's a type of some sort. Just ignore it. */
3494 /* Skip over the type. */
3498 /* Skip over the colon. */
3502 /* Read the value-names and their values.
3503 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
3504 A semicolon or comma instead of a NAME means the end. */
3505 while (**pp
&& **pp
!= ';' && **pp
!= ',')
3507 STABS_CONTINUE (pp
, objfile
);
3511 name
= obsavestring (*pp
, p
- *pp
, &objfile
->objfile_obstack
);
3513 n
= read_huge_number (pp
, ',', &nbits
, 0);
3515 return error_type (pp
, objfile
);
3517 sym
= (struct symbol
*)
3518 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
3519 memset (sym
, 0, sizeof (struct symbol
));
3520 DEPRECATED_SYMBOL_NAME (sym
) = name
;
3521 SYMBOL_LANGUAGE (sym
) = current_subfile
->language
;
3522 SYMBOL_CLASS (sym
) = LOC_CONST
;
3523 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
3524 SYMBOL_VALUE (sym
) = n
;
3527 add_symbol_to_list (sym
, symlist
);
3532 (*pp
)++; /* Skip the semicolon. */
3534 /* Now fill in the fields of the type-structure. */
3536 TYPE_LENGTH (type
) = TARGET_INT_BIT
/ HOST_CHAR_BIT
;
3537 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
3538 TYPE_FLAGS (type
) &= ~TYPE_FLAG_STUB
;
3540 TYPE_FLAGS (type
) |= TYPE_FLAG_UNSIGNED
;
3541 TYPE_NFIELDS (type
) = nsyms
;
3542 TYPE_FIELDS (type
) = (struct field
*)
3543 TYPE_ALLOC (type
, sizeof (struct field
) * nsyms
);
3544 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nsyms
);
3546 /* Find the symbols for the values and put them into the type.
3547 The symbols can be found in the symlist that we put them on
3548 to cause them to be defined. osyms contains the old value
3549 of that symlist; everything up to there was defined by us. */
3550 /* Note that we preserve the order of the enum constants, so
3551 that in something like "enum {FOO, LAST_THING=FOO}" we print
3552 FOO, not LAST_THING. */
3554 for (syms
= *symlist
, n
= nsyms
- 1; syms
; syms
= syms
->next
)
3556 int last
= syms
== osyms
? o_nsyms
: 0;
3557 int j
= syms
->nsyms
;
3558 for (; --j
>= last
; --n
)
3560 struct symbol
*xsym
= syms
->symbol
[j
];
3561 SYMBOL_TYPE (xsym
) = type
;
3562 TYPE_FIELD_NAME (type
, n
) = DEPRECATED_SYMBOL_NAME (xsym
);
3563 TYPE_FIELD_BITPOS (type
, n
) = SYMBOL_VALUE (xsym
);
3564 TYPE_FIELD_BITSIZE (type
, n
) = 0;
3573 /* Sun's ACC uses a somewhat saner method for specifying the builtin
3574 typedefs in every file (for int, long, etc):
3576 type = b <signed> <width> <format type>; <offset>; <nbits>
3578 optional format type = c or b for char or boolean.
3579 offset = offset from high order bit to start bit of type.
3580 width is # bytes in object of this type, nbits is # bits in type.
3582 The width/offset stuff appears to be for small objects stored in
3583 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
3586 static struct type
*
3587 read_sun_builtin_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3592 enum type_code code
= TYPE_CODE_INT
;
3603 return error_type (pp
, objfile
);
3607 /* For some odd reason, all forms of char put a c here. This is strange
3608 because no other type has this honor. We can safely ignore this because
3609 we actually determine 'char'acterness by the number of bits specified in
3611 Boolean forms, e.g Fortran logical*X, put a b here. */
3615 else if (**pp
== 'b')
3617 code
= TYPE_CODE_BOOL
;
3621 /* The first number appears to be the number of bytes occupied
3622 by this type, except that unsigned short is 4 instead of 2.
3623 Since this information is redundant with the third number,
3624 we will ignore it. */
3625 read_huge_number (pp
, ';', &nbits
, 0);
3627 return error_type (pp
, objfile
);
3629 /* The second number is always 0, so ignore it too. */
3630 read_huge_number (pp
, ';', &nbits
, 0);
3632 return error_type (pp
, objfile
);
3634 /* The third number is the number of bits for this type. */
3635 type_bits
= read_huge_number (pp
, 0, &nbits
, 0);
3637 return error_type (pp
, objfile
);
3638 /* The type *should* end with a semicolon. If it are embedded
3639 in a larger type the semicolon may be the only way to know where
3640 the type ends. If this type is at the end of the stabstring we
3641 can deal with the omitted semicolon (but we don't have to like
3642 it). Don't bother to complain(), Sun's compiler omits the semicolon
3648 return init_type (TYPE_CODE_VOID
, 1,
3649 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3652 return init_type (code
,
3653 type_bits
/ TARGET_CHAR_BIT
,
3654 signed_type
? 0 : TYPE_FLAG_UNSIGNED
, (char *) NULL
,
3658 static struct type
*
3659 read_sun_floating_type (char **pp
, int typenums
[2], struct objfile
*objfile
)
3664 struct type
*rettype
;
3666 /* The first number has more details about the type, for example
3668 details
= read_huge_number (pp
, ';', &nbits
, 0);
3670 return error_type (pp
, objfile
);
3672 /* The second number is the number of bytes occupied by this type */
3673 nbytes
= read_huge_number (pp
, ';', &nbits
, 0);
3675 return error_type (pp
, objfile
);
3677 if (details
== NF_COMPLEX
|| details
== NF_COMPLEX16
3678 || details
== NF_COMPLEX32
)
3680 rettype
= init_type (TYPE_CODE_COMPLEX
, nbytes
, 0, NULL
, objfile
);
3681 TYPE_TARGET_TYPE (rettype
)
3682 = init_type (TYPE_CODE_FLT
, nbytes
/ 2, 0, NULL
, objfile
);
3686 return init_type (TYPE_CODE_FLT
, nbytes
, 0, NULL
, objfile
);
3689 /* Read a number from the string pointed to by *PP.
3690 The value of *PP is advanced over the number.
3691 If END is nonzero, the character that ends the
3692 number must match END, or an error happens;
3693 and that character is skipped if it does match.
3694 If END is zero, *PP is left pointing to that character.
3696 If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
3697 the number is represented in an octal representation, assume that
3698 it is represented in a 2's complement representation with a size of
3699 TWOS_COMPLEMENT_BITS.
3701 If the number fits in a long, set *BITS to 0 and return the value.
3702 If not, set *BITS to be the number of bits in the number and return 0.
3704 If encounter garbage, set *BITS to -1 and return 0. */
3707 read_huge_number (char **pp
, int end
, int *bits
, int twos_complement_bits
)
3719 int twos_complement_representation
= radix
== 8 && twos_complement_bits
> 0;
3727 /* Leading zero means octal. GCC uses this to output values larger
3728 than an int (because that would be hard in decimal). */
3735 upper_limit
= LONG_MAX
/ radix
;
3737 while ((c
= *p
++) >= '0' && c
< ('0' + radix
))
3739 if (n
<= upper_limit
)
3741 if (twos_complement_representation
)
3743 /* Octal, signed, twos complement representation. In this case,
3744 sn is the signed value, n is the corresponding absolute
3745 value. signed_bit is the position of the sign bit in the
3746 first three bits. */
3749 sign_bit
= (twos_complement_bits
% 3 + 2) % 3;
3750 sn
= c
- '0' - ((2 * (c
- '0')) | (2 << sign_bit
));
3763 /* unsigned representation */
3765 n
+= c
- '0'; /* FIXME this overflows anyway */
3771 /* This depends on large values being output in octal, which is
3778 /* Ignore leading zeroes. */
3782 else if (c
== '2' || c
== '3')
3808 /* Large decimal constants are an error (because it is hard to
3809 count how many bits are in them). */
3815 /* -0x7f is the same as 0x80. So deal with it by adding one to
3816 the number of bits. */
3826 if (twos_complement_representation
)
3831 /* It's *BITS which has the interesting information. */
3835 static struct type
*
3836 read_range_type (char **pp
, int typenums
[2], int type_size
,
3837 struct objfile
*objfile
)
3839 char *orig_pp
= *pp
;
3844 struct type
*result_type
;
3845 struct type
*index_type
= NULL
;
3847 /* First comes a type we are a subrange of.
3848 In C it is usually 0, 1 or the type being defined. */
3849 if (read_type_number (pp
, rangenums
) != 0)
3850 return error_type (pp
, objfile
);
3851 self_subrange
= (rangenums
[0] == typenums
[0] &&
3852 rangenums
[1] == typenums
[1]);
3857 index_type
= read_type (pp
, objfile
);
3860 /* A semicolon should now follow; skip it. */
3864 /* The remaining two operands are usually lower and upper bounds
3865 of the range. But in some special cases they mean something else. */
3866 n2
= read_huge_number (pp
, ';', &n2bits
, type_size
);
3867 n3
= read_huge_number (pp
, ';', &n3bits
, type_size
);
3869 if (n2bits
== -1 || n3bits
== -1)
3870 return error_type (pp
, objfile
);
3873 goto handle_true_range
;
3875 /* If limits are huge, must be large integral type. */
3876 if (n2bits
!= 0 || n3bits
!= 0)
3878 char got_signed
= 0;
3879 char got_unsigned
= 0;
3880 /* Number of bits in the type. */
3883 /* If a type size attribute has been specified, the bounds of
3884 the range should fit in this size. If the lower bounds needs
3885 more bits than the upper bound, then the type is signed. */
3886 if (n2bits
<= type_size
&& n3bits
<= type_size
)
3888 if (n2bits
== type_size
&& n2bits
> n3bits
)
3894 /* Range from 0 to <large number> is an unsigned large integral type. */
3895 else if ((n2bits
== 0 && n2
== 0) && n3bits
!= 0)
3900 /* Range from <large number> to <large number>-1 is a large signed
3901 integral type. Take care of the case where <large number> doesn't
3902 fit in a long but <large number>-1 does. */
3903 else if ((n2bits
!= 0 && n3bits
!= 0 && n2bits
== n3bits
+ 1)
3904 || (n2bits
!= 0 && n3bits
== 0
3905 && (n2bits
== sizeof (long) * HOST_CHAR_BIT
)
3912 if (got_signed
|| got_unsigned
)
3914 return init_type (TYPE_CODE_INT
, nbits
/ TARGET_CHAR_BIT
,
3915 got_unsigned
? TYPE_FLAG_UNSIGNED
: 0, NULL
,
3919 return error_type (pp
, objfile
);
3922 /* A type defined as a subrange of itself, with bounds both 0, is void. */
3923 if (self_subrange
&& n2
== 0 && n3
== 0)
3924 return init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
3926 /* If n3 is zero and n2 is positive, we want a floating type, and n2
3927 is the width in bytes.
3929 Fortran programs appear to use this for complex types also. To
3930 distinguish between floats and complex, g77 (and others?) seem
3931 to use self-subranges for the complexes, and subranges of int for
3934 Also note that for complexes, g77 sets n2 to the size of one of
3935 the member floats, not the whole complex beast. My guess is that
3936 this was to work well with pre-COMPLEX versions of gdb. */
3938 if (n3
== 0 && n2
> 0)
3940 struct type
*float_type
3941 = init_type (TYPE_CODE_FLT
, n2
, 0, NULL
, objfile
);
3945 struct type
*complex_type
=
3946 init_type (TYPE_CODE_COMPLEX
, 2 * n2
, 0, NULL
, objfile
);
3947 TYPE_TARGET_TYPE (complex_type
) = float_type
;
3948 return complex_type
;
3954 /* If the upper bound is -1, it must really be an unsigned int. */
3956 else if (n2
== 0 && n3
== -1)
3958 /* It is unsigned int or unsigned long. */
3959 /* GCC 2.3.3 uses this for long long too, but that is just a GDB 3.5
3960 compatibility hack. */
3961 return init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
3962 TYPE_FLAG_UNSIGNED
, NULL
, objfile
);
3965 /* Special case: char is defined (Who knows why) as a subrange of
3966 itself with range 0-127. */
3967 else if (self_subrange
&& n2
== 0 && n3
== 127)
3968 return init_type (TYPE_CODE_INT
, 1, TYPE_FLAG_NOSIGN
, NULL
, objfile
);
3970 /* We used to do this only for subrange of self or subrange of int. */
3973 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
3974 "unsigned long", and we already checked for that,
3975 so don't need to test for it here. */
3978 /* n3 actually gives the size. */
3979 return init_type (TYPE_CODE_INT
, -n3
, TYPE_FLAG_UNSIGNED
,
3982 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
3983 unsigned n-byte integer. But do require n to be a power of
3984 two; we don't want 3- and 5-byte integers flying around. */
3990 for (bytes
= 0; (bits
& 0xff) == 0xff; bytes
++)
3993 && ((bytes
- 1) & bytes
) == 0) /* "bytes is a power of two" */
3994 return init_type (TYPE_CODE_INT
, bytes
, TYPE_FLAG_UNSIGNED
, NULL
,
3998 /* I think this is for Convex "long long". Since I don't know whether
3999 Convex sets self_subrange, I also accept that particular size regardless
4000 of self_subrange. */
4001 else if (n3
== 0 && n2
< 0
4003 || n2
== -TARGET_LONG_LONG_BIT
/ TARGET_CHAR_BIT
))
4004 return init_type (TYPE_CODE_INT
, -n2
, 0, NULL
, objfile
);
4005 else if (n2
== -n3
- 1)
4008 return init_type (TYPE_CODE_INT
, 1, 0, NULL
, objfile
);
4010 return init_type (TYPE_CODE_INT
, 2, 0, NULL
, objfile
);
4011 if (n3
== 0x7fffffff)
4012 return init_type (TYPE_CODE_INT
, 4, 0, NULL
, objfile
);
4015 /* We have a real range type on our hands. Allocate space and
4016 return a real pointer. */
4020 index_type
= builtin_type_int
;
4022 index_type
= *dbx_lookup_type (rangenums
);
4023 if (index_type
== NULL
)
4025 /* Does this actually ever happen? Is that why we are worrying
4026 about dealing with it rather than just calling error_type? */
4028 static struct type
*range_type_index
;
4030 complaint (&symfile_complaints
,
4031 _("base type %d of range type is not defined"), rangenums
[1]);
4032 if (range_type_index
== NULL
)
4034 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ TARGET_CHAR_BIT
,
4035 0, "range type index type", NULL
);
4036 index_type
= range_type_index
;
4039 result_type
= create_range_type ((struct type
*) NULL
, index_type
, n2
, n3
);
4040 return (result_type
);
4043 /* Read in an argument list. This is a list of types, separated by commas
4044 and terminated with END. Return the list of types read in, or NULL
4045 if there is an error. */
4047 static struct field
*
4048 read_args (char **pp
, int end
, struct objfile
*objfile
, int *nargsp
,
4051 /* FIXME! Remove this arbitrary limit! */
4052 struct type
*types
[1024]; /* allow for fns of 1023 parameters */
4059 /* Invalid argument list: no ','. */
4062 STABS_CONTINUE (pp
, objfile
);
4063 types
[n
++] = read_type (pp
, objfile
);
4065 (*pp
)++; /* get past `end' (the ':' character) */
4067 if (TYPE_CODE (types
[n
- 1]) != TYPE_CODE_VOID
)
4075 rval
= (struct field
*) xmalloc (n
* sizeof (struct field
));
4076 memset (rval
, 0, n
* sizeof (struct field
));
4077 for (i
= 0; i
< n
; i
++)
4078 rval
[i
].type
= types
[i
];
4083 /* Common block handling. */
4085 /* List of symbols declared since the last BCOMM. This list is a tail
4086 of local_symbols. When ECOMM is seen, the symbols on the list
4087 are noted so their proper addresses can be filled in later,
4088 using the common block base address gotten from the assembler
4091 static struct pending
*common_block
;
4092 static int common_block_i
;
4094 /* Name of the current common block. We get it from the BCOMM instead of the
4095 ECOMM to match IBM documentation (even though IBM puts the name both places
4096 like everyone else). */
4097 static char *common_block_name
;
4099 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
4100 to remain after this function returns. */
4103 common_block_start (char *name
, struct objfile
*objfile
)
4105 if (common_block_name
!= NULL
)
4107 complaint (&symfile_complaints
,
4108 _("Invalid symbol data: common block within common block"));
4110 common_block
= local_symbols
;
4111 common_block_i
= local_symbols
? local_symbols
->nsyms
: 0;
4112 common_block_name
= obsavestring (name
, strlen (name
),
4113 &objfile
->objfile_obstack
);
4116 /* Process a N_ECOMM symbol. */
4119 common_block_end (struct objfile
*objfile
)
4121 /* Symbols declared since the BCOMM are to have the common block
4122 start address added in when we know it. common_block and
4123 common_block_i point to the first symbol after the BCOMM in
4124 the local_symbols list; copy the list and hang it off the
4125 symbol for the common block name for later fixup. */
4128 struct pending
*new = 0;
4129 struct pending
*next
;
4132 if (common_block_name
== NULL
)
4134 complaint (&symfile_complaints
, _("ECOMM symbol unmatched by BCOMM"));
4138 sym
= (struct symbol
*)
4139 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symbol
));
4140 memset (sym
, 0, sizeof (struct symbol
));
4141 /* Note: common_block_name already saved on objfile_obstack */
4142 DEPRECATED_SYMBOL_NAME (sym
) = common_block_name
;
4143 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
4145 /* Now we copy all the symbols which have been defined since the BCOMM. */
4147 /* Copy all the struct pendings before common_block. */
4148 for (next
= local_symbols
;
4149 next
!= NULL
&& next
!= common_block
;
4152 for (j
= 0; j
< next
->nsyms
; j
++)
4153 add_symbol_to_list (next
->symbol
[j
], &new);
4156 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
4157 NULL, it means copy all the local symbols (which we already did
4160 if (common_block
!= NULL
)
4161 for (j
= common_block_i
; j
< common_block
->nsyms
; j
++)
4162 add_symbol_to_list (common_block
->symbol
[j
], &new);
4164 SYMBOL_TYPE (sym
) = (struct type
*) new;
4166 /* Should we be putting local_symbols back to what it was?
4169 i
= hashname (DEPRECATED_SYMBOL_NAME (sym
));
4170 SYMBOL_VALUE_CHAIN (sym
) = global_sym_chain
[i
];
4171 global_sym_chain
[i
] = sym
;
4172 common_block_name
= NULL
;
4175 /* Add a common block's start address to the offset of each symbol
4176 declared to be in it (by being between a BCOMM/ECOMM pair that uses
4177 the common block name). */
4180 fix_common_block (struct symbol
*sym
, int valu
)
4182 struct pending
*next
= (struct pending
*) SYMBOL_TYPE (sym
);
4183 for (; next
; next
= next
->next
)
4186 for (j
= next
->nsyms
- 1; j
>= 0; j
--)
4187 SYMBOL_VALUE_ADDRESS (next
->symbol
[j
]) += valu
;
4193 /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
4194 See add_undefined_type for more details. */
4197 add_undefined_type_noname (struct type
*type
, int typenums
[2])
4201 nat
.typenums
[0] = typenums
[0];
4202 nat
.typenums
[1] = typenums
[1];
4205 if (noname_undefs_length
== noname_undefs_allocated
)
4207 noname_undefs_allocated
*= 2;
4208 noname_undefs
= (struct nat
*)
4209 xrealloc ((char *) noname_undefs
,
4210 noname_undefs_allocated
* sizeof (struct nat
));
4212 noname_undefs
[noname_undefs_length
++] = nat
;
4215 /* Add TYPE to the UNDEF_TYPES vector.
4216 See add_undefined_type for more details. */
4219 add_undefined_type_1 (struct type
*type
)
4221 if (undef_types_length
== undef_types_allocated
)
4223 undef_types_allocated
*= 2;
4224 undef_types
= (struct type
**)
4225 xrealloc ((char *) undef_types
,
4226 undef_types_allocated
* sizeof (struct type
*));
4228 undef_types
[undef_types_length
++] = type
;
4231 /* What about types defined as forward references inside of a small lexical
4233 /* Add a type to the list of undefined types to be checked through
4234 once this file has been read in.
4236 In practice, we actually maintain two such lists: The first list
4237 (UNDEF_TYPES) is used for types whose name has been provided, and
4238 concerns forward references (eg 'xs' or 'xu' forward references);
4239 the second list (NONAME_UNDEFS) is used for types whose name is
4240 unknown at creation time, because they were referenced through
4241 their type number before the actual type was declared.
4242 This function actually adds the given type to the proper list. */
4245 add_undefined_type (struct type
*type
, int typenums
[2])
4247 if (TYPE_TAG_NAME (type
) == NULL
)
4248 add_undefined_type_noname (type
, typenums
);
4250 add_undefined_type_1 (type
);
4253 /* Try to fix all undefined types pushed on the UNDEF_TYPES vector. */
4256 cleanup_undefined_types_noname (void)
4260 for (i
= 0; i
< noname_undefs_length
; i
++)
4262 struct nat nat
= noname_undefs
[i
];
4265 type
= dbx_lookup_type (nat
.typenums
);
4266 if (nat
.type
!= *type
&& TYPE_CODE (*type
) != TYPE_CODE_UNDEF
)
4267 replace_type (nat
.type
, *type
);
4270 noname_undefs_length
= 0;
4273 /* Go through each undefined type, see if it's still undefined, and fix it
4274 up if possible. We have two kinds of undefined types:
4276 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
4277 Fix: update array length using the element bounds
4278 and the target type's length.
4279 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
4280 yet defined at the time a pointer to it was made.
4281 Fix: Do a full lookup on the struct/union tag. */
4284 cleanup_undefined_types_1 (void)
4288 for (type
= undef_types
; type
< undef_types
+ undef_types_length
; type
++)
4290 switch (TYPE_CODE (*type
))
4293 case TYPE_CODE_STRUCT
:
4294 case TYPE_CODE_UNION
:
4295 case TYPE_CODE_ENUM
:
4297 /* Check if it has been defined since. Need to do this here
4298 as well as in check_typedef to deal with the (legitimate in
4299 C though not C++) case of several types with the same name
4300 in different source files. */
4301 if (TYPE_STUB (*type
))
4303 struct pending
*ppt
;
4305 /* Name of the type, without "struct" or "union" */
4306 char *typename
= TYPE_TAG_NAME (*type
);
4308 if (typename
== NULL
)
4310 complaint (&symfile_complaints
, _("need a type name"));
4313 for (ppt
= file_symbols
; ppt
; ppt
= ppt
->next
)
4315 for (i
= 0; i
< ppt
->nsyms
; i
++)
4317 struct symbol
*sym
= ppt
->symbol
[i
];
4319 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4320 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4321 && (TYPE_CODE (SYMBOL_TYPE (sym
)) ==
4323 && strcmp (DEPRECATED_SYMBOL_NAME (sym
), typename
) == 0)
4324 replace_type (*type
, SYMBOL_TYPE (sym
));
4333 complaint (&symfile_complaints
,
4334 _("forward-referenced types left unresolved, "
4342 undef_types_length
= 0;
4345 /* Try to fix all the undefined types we ecountered while processing
4349 cleanup_undefined_types (void)
4351 cleanup_undefined_types_1 ();
4352 cleanup_undefined_types_noname ();
4355 /* Scan through all of the global symbols defined in the object file,
4356 assigning values to the debugging symbols that need to be assigned
4357 to. Get these symbols from the minimal symbol table. */
4360 scan_file_globals (struct objfile
*objfile
)
4363 struct minimal_symbol
*msymbol
;
4364 struct symbol
*sym
, *prev
;
4365 struct objfile
*resolve_objfile
;
4367 /* SVR4 based linkers copy referenced global symbols from shared
4368 libraries to the main executable.
4369 If we are scanning the symbols for a shared library, try to resolve
4370 them from the minimal symbols of the main executable first. */
4372 if (symfile_objfile
&& objfile
!= symfile_objfile
)
4373 resolve_objfile
= symfile_objfile
;
4375 resolve_objfile
= objfile
;
4379 /* Avoid expensive loop through all minimal symbols if there are
4380 no unresolved symbols. */
4381 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4383 if (global_sym_chain
[hash
])
4386 if (hash
>= HASHSIZE
)
4389 for (msymbol
= resolve_objfile
->msymbols
;
4390 msymbol
&& DEPRECATED_SYMBOL_NAME (msymbol
) != NULL
;
4395 /* Skip static symbols. */
4396 switch (MSYMBOL_TYPE (msymbol
))
4408 /* Get the hash index and check all the symbols
4409 under that hash index. */
4411 hash
= hashname (DEPRECATED_SYMBOL_NAME (msymbol
));
4413 for (sym
= global_sym_chain
[hash
]; sym
;)
4415 if (DEPRECATED_SYMBOL_NAME (msymbol
)[0] == DEPRECATED_SYMBOL_NAME (sym
)[0] &&
4416 strcmp (DEPRECATED_SYMBOL_NAME (msymbol
) + 1, DEPRECATED_SYMBOL_NAME (sym
) + 1) == 0)
4418 /* Splice this symbol out of the hash chain and
4419 assign the value we have to it. */
4422 SYMBOL_VALUE_CHAIN (prev
) = SYMBOL_VALUE_CHAIN (sym
);
4426 global_sym_chain
[hash
] = SYMBOL_VALUE_CHAIN (sym
);
4429 /* Check to see whether we need to fix up a common block. */
4430 /* Note: this code might be executed several times for
4431 the same symbol if there are multiple references. */
4434 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4436 fix_common_block (sym
,
4437 SYMBOL_VALUE_ADDRESS (msymbol
));
4441 SYMBOL_VALUE_ADDRESS (sym
)
4442 = SYMBOL_VALUE_ADDRESS (msymbol
);
4444 SYMBOL_SECTION (sym
) = SYMBOL_SECTION (msymbol
);
4449 sym
= SYMBOL_VALUE_CHAIN (prev
);
4453 sym
= global_sym_chain
[hash
];
4459 sym
= SYMBOL_VALUE_CHAIN (sym
);
4463 if (resolve_objfile
== objfile
)
4465 resolve_objfile
= objfile
;
4468 /* Change the storage class of any remaining unresolved globals to
4469 LOC_UNRESOLVED and remove them from the chain. */
4470 for (hash
= 0; hash
< HASHSIZE
; hash
++)
4472 sym
= global_sym_chain
[hash
];
4476 sym
= SYMBOL_VALUE_CHAIN (sym
);
4478 /* Change the symbol address from the misleading chain value
4480 SYMBOL_VALUE_ADDRESS (prev
) = 0;
4482 /* Complain about unresolved common block symbols. */
4483 if (SYMBOL_CLASS (prev
) == LOC_STATIC
)
4484 SYMBOL_CLASS (prev
) = LOC_UNRESOLVED
;
4486 complaint (&symfile_complaints
,
4487 _("%s: common block `%s' from global_sym_chain unresolved"),
4488 objfile
->name
, DEPRECATED_SYMBOL_NAME (prev
));
4491 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4494 /* Initialize anything that needs initializing when starting to read
4495 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
4499 stabsread_init (void)
4503 /* Initialize anything that needs initializing when a completely new
4504 symbol file is specified (not just adding some symbols from another
4505 file, e.g. a shared library). */
4508 stabsread_new_init (void)
4510 /* Empty the hash table of global syms looking for values. */
4511 memset (global_sym_chain
, 0, sizeof (global_sym_chain
));
4514 /* Initialize anything that needs initializing at the same time as
4515 start_symtab() is called. */
4520 global_stabs
= NULL
; /* AIX COFF */
4521 /* Leave FILENUM of 0 free for builtin types and this file's types. */
4522 n_this_object_header_files
= 1;
4523 type_vector_length
= 0;
4524 type_vector
= (struct type
**) 0;
4526 /* FIXME: If common_block_name is not already NULL, we should complain(). */
4527 common_block_name
= NULL
;
4530 /* Call after end_symtab() */
4537 xfree (type_vector
);
4540 type_vector_length
= 0;
4541 previous_stab_code
= 0;
4545 finish_global_stabs (struct objfile
*objfile
)
4549 patch_block_stabs (global_symbols
, global_stabs
, objfile
);
4550 xfree (global_stabs
);
4551 global_stabs
= NULL
;
4555 /* Find the end of the name, delimited by a ':', but don't match
4556 ObjC symbols which look like -[Foo bar::]:bla. */
4558 find_name_end (char *name
)
4561 if (s
[0] == '-' || *s
== '+')
4563 /* Must be an ObjC method symbol. */
4566 error (_("invalid symbol name \"%s\""), name
);
4568 s
= strchr (s
, ']');
4571 error (_("invalid symbol name \"%s\""), name
);
4573 return strchr (s
, ':');
4577 return strchr (s
, ':');
4581 /* Initializer for this module */
4584 _initialize_stabsread (void)
4586 undef_types_allocated
= 20;
4587 undef_types_length
= 0;
4588 undef_types
= (struct type
**)
4589 xmalloc (undef_types_allocated
* sizeof (struct type
*));
4591 noname_undefs_allocated
= 20;
4592 noname_undefs_length
= 0;
4593 noname_undefs
= (struct nat
*)
4594 xmalloc (noname_undefs_allocated
* sizeof (struct nat
));