1 /* Support routines for decoding "stabs" debugging information format.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* Support routines for reading and decoding debugging information in
24 the "stabs" format. This format is used with many systems that use
25 the a.out object file format, as well as some systems that use
26 COFF or ELF where the stabs data is placed in a special section.
27 Avoid placing any object file format specific code in this file. */
30 #include "gdb_string.h"
32 #include "gdb_obstack.h"
35 #include "expression.h"
38 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
40 #include "aout/aout64.h"
41 #include "gdb-stabs.h"
43 #include "complaints.h"
48 #include "cp-support.h"
52 /* Ask stabsread.h to define the vars it normally declares `extern'. */
55 #include "stabsread.h" /* Our own declarations */
58 extern void _initialize_stabsread (void);
60 /* The routines that read and process a complete stabs for a C struct or
61 C++ class pass lists of data member fields and lists of member function
62 fields in an instance of a field_info structure, as defined below.
63 This is part of some reorganization of low level C++ support and is
64 expected to eventually go away... (FIXME) */
70 struct nextfield *next;
72 /* This is the raw visibility from the stab. It is not checked
73 for being one of the visibilities we recognize, so code which
74 examines this field better be able to deal. */
80 struct next_fnfieldlist
82 struct next_fnfieldlist *next;
83 struct fn_fieldlist fn_fieldlist;
89 read_one_struct_field (struct field_info *, char **, char *,
90 struct type *, struct objfile *);
92 static char *get_substring (char **, int);
94 static struct type *dbx_alloc_type (int[2], struct objfile *);
96 static long read_huge_number (char **, int, int *);
98 static struct type *error_type (char **, struct objfile *);
101 patch_block_stabs (struct pending *, struct pending_stabs *,
104 static void fix_common_block (struct symbol *, int);
106 static int read_type_number (char **, int *);
108 static struct type *read_range_type (char **, int[2], struct objfile *);
110 static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);
112 static struct type *read_sun_floating_type (char **, int[2],
115 static struct type *read_enum_type (char **, struct type *, struct objfile *);
117 static struct type *rs6000_builtin_type (int);
120 read_member_functions (struct field_info *, char **, struct type *,
124 read_struct_fields (struct field_info *, char **, struct type *,
128 read_baseclasses (struct field_info *, char **, struct type *,
132 read_tilde_fields (struct field_info *, char **, struct type *,
135 static int attach_fn_fields_to_type (struct field_info *, struct type *);
138 attach_fields_to_type (struct field_info *, struct type *, struct objfile *);
140 static struct type *read_struct_type (char **, struct type *,
144 static struct type *read_array_type (char **, struct type *,
147 static struct field *read_args (char **, int, struct objfile *, int *, int *);
150 read_cpp_abbrev (struct field_info *, char **, struct type *,
153 /* new functions added for cfront support */
156 copy_cfront_struct_fields (struct field_info *, struct type *,
159 static char *get_cfront_method_physname (char *);
162 read_cfront_baseclasses (struct field_info *, char **,
163 struct type *, struct objfile *);
166 read_cfront_static_fields (struct field_info *, char **,
167 struct type *, struct objfile *);
169 read_cfront_member_functions (struct field_info *, char **,
170 struct type *, struct objfile *);
172 static char *find_name_end (char *name);
174 /* end new functions added for cfront support */
177 add_live_range (struct objfile *, struct symbol *, CORE_ADDR, CORE_ADDR);
179 static int resolve_live_range (struct objfile *, struct symbol *, char *);
181 static int process_reference (char **string);
183 static CORE_ADDR ref_search_value (int refnum);
186 resolve_symbol_reference (struct objfile *, struct symbol *, char *);
188 void stabsread_clear_cache (void);
190 static const char vptr_name[] = "_vptr$";
191 static const char vb_name[] = "_vb$";
193 /* Define this as 1 if a pcc declaration of a char or short argument
194 gives the correct address. Otherwise assume pcc gives the
195 address of the corresponding int, which is not the same on a
196 big-endian machine. */
198 #if !defined (BELIEVE_PCC_PROMOTION)
199 #define BELIEVE_PCC_PROMOTION 0
201 #if !defined (BELIEVE_PCC_PROMOTION_TYPE)
202 #define BELIEVE_PCC_PROMOTION_TYPE 0
206 invalid_cpp_abbrev_complaint (const char *arg1)
208 complaint (&symfile_complaints, "invalid C++ abbreviation `%s'", arg1);
212 reg_value_complaint (int arg1, int arg2, const char *arg3)
214 complaint (&symfile_complaints,
215 "register number %d too large (max %d) in symbol %s", arg1, arg2,
220 stabs_general_complaint (const char *arg1)
222 complaint (&symfile_complaints, "%s", arg1);
226 lrs_general_complaint (const char *arg1)
228 complaint (&symfile_complaints, "%s", arg1);
231 /* Make a list of forward references which haven't been defined. */
233 static struct type **undef_types;
234 static int undef_types_allocated;
235 static int undef_types_length;
236 static struct symbol *current_symbol = NULL;
238 /* Check for and handle cretinous stabs symbol name continuation! */
239 #define STABS_CONTINUE(pp,objfile) \
241 if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
242 *(pp) = next_symbol_text (objfile); \
246 /* Look up a dbx type-number pair. Return the address of the slot
247 where the type for that number-pair is stored.
248 The number-pair is in TYPENUMS.
250 This can be used for finding the type associated with that pair
251 or for associating a new type with the pair. */
254 dbx_lookup_type (int typenums[2])
256 register int filenum = typenums[0];
257 register int index = typenums[1];
259 register int real_filenum;
260 register struct header_file *f;
263 if (filenum == -1) /* -1,-1 is for temporary types. */
266 if (filenum < 0 || filenum >= n_this_object_header_files)
268 complaint (&symfile_complaints,
269 "Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.",
270 filenum, index, symnum);
278 /* Caller wants address of address of type. We think
279 that negative (rs6k builtin) types will never appear as
280 "lvalues", (nor should they), so we stuff the real type
281 pointer into a temp, and return its address. If referenced,
282 this will do the right thing. */
283 static struct type *temp_type;
285 temp_type = rs6000_builtin_type (index);
289 /* Type is defined outside of header files.
290 Find it in this object file's type vector. */
291 if (index >= type_vector_length)
293 old_len = type_vector_length;
296 type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
297 type_vector = (struct type **)
298 xmalloc (type_vector_length * sizeof (struct type *));
300 while (index >= type_vector_length)
302 type_vector_length *= 2;
304 type_vector = (struct type **)
305 xrealloc ((char *) type_vector,
306 (type_vector_length * sizeof (struct type *)));
307 memset (&type_vector[old_len], 0,
308 (type_vector_length - old_len) * sizeof (struct type *));
310 return (&type_vector[index]);
314 real_filenum = this_object_header_files[filenum];
316 if (real_filenum >= N_HEADER_FILES (current_objfile))
318 struct type *temp_type;
319 struct type **temp_type_p;
321 warning ("GDB internal error: bad real_filenum");
324 temp_type = init_type (TYPE_CODE_ERROR, 0, 0, NULL, NULL);
325 temp_type_p = (struct type **) xmalloc (sizeof (struct type *));
326 *temp_type_p = temp_type;
330 f = HEADER_FILES (current_objfile) + real_filenum;
332 f_orig_length = f->length;
333 if (index >= f_orig_length)
335 while (index >= f->length)
339 f->vector = (struct type **)
340 xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
341 memset (&f->vector[f_orig_length], 0,
342 (f->length - f_orig_length) * sizeof (struct type *));
344 return (&f->vector[index]);
348 /* Make sure there is a type allocated for type numbers TYPENUMS
349 and return the type object.
350 This can create an empty (zeroed) type object.
351 TYPENUMS may be (-1, -1) to return a new type object that is not
352 put into the type vector, and so may not be referred to by number. */
355 dbx_alloc_type (int typenums[2], struct objfile *objfile)
357 register struct type **type_addr;
359 if (typenums[0] == -1)
361 return (alloc_type (objfile));
364 type_addr = dbx_lookup_type (typenums);
366 /* If we are referring to a type not known at all yet,
367 allocate an empty type for it.
368 We will fill it in later if we find out how. */
371 *type_addr = alloc_type (objfile);
377 /* for all the stabs in a given stab vector, build appropriate types
378 and fix their symbols in given symbol vector. */
381 patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
382 struct objfile *objfile)
392 /* for all the stab entries, find their corresponding symbols and
393 patch their types! */
395 for (ii = 0; ii < stabs->count; ++ii)
397 name = stabs->stab[ii];
398 pp = (char *) strchr (name, ':');
402 pp = (char *) strchr (pp, ':');
404 sym = find_symbol_in_list (symbols, name, pp - name);
407 /* FIXME-maybe: it would be nice if we noticed whether
408 the variable was defined *anywhere*, not just whether
409 it is defined in this compilation unit. But neither
410 xlc or GCC seem to need such a definition, and until
411 we do psymtabs (so that the minimal symbols from all
412 compilation units are available now), I'm not sure
413 how to get the information. */
415 /* On xcoff, if a global is defined and never referenced,
416 ld will remove it from the executable. There is then
417 a N_GSYM stab for it, but no regular (C_EXT) symbol. */
418 sym = (struct symbol *)
419 obstack_alloc (&objfile->symbol_obstack,
420 sizeof (struct symbol));
422 memset (sym, 0, sizeof (struct symbol));
423 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
424 SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
426 obsavestring (name, pp - name, &objfile->symbol_obstack);
428 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
430 /* I don't think the linker does this with functions,
431 so as far as I know this is never executed.
432 But it doesn't hurt to check. */
434 lookup_function_type (read_type (&pp, objfile));
438 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
440 add_symbol_to_list (sym, &global_symbols);
445 if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
448 lookup_function_type (read_type (&pp, objfile));
452 SYMBOL_TYPE (sym) = read_type (&pp, objfile);
460 /* Read a number by which a type is referred to in dbx data,
461 or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
462 Just a single number N is equivalent to (0,N).
463 Return the two numbers by storing them in the vector TYPENUMS.
464 TYPENUMS will then be used as an argument to dbx_lookup_type.
466 Returns 0 for success, -1 for error. */
469 read_type_number (register char **pp, register int *typenums)
475 typenums[0] = read_huge_number (pp, ',', &nbits);
478 typenums[1] = read_huge_number (pp, ')', &nbits);
485 typenums[1] = read_huge_number (pp, 0, &nbits);
493 #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
494 #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
495 #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
496 #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
498 #define CFRONT_VISIBILITY_PRIVATE '2' /* Stabs character for private field */
499 #define CFRONT_VISIBILITY_PUBLIC '1' /* Stabs character for public field */
501 /* This code added to support parsing of ARM/Cfront stabs strings */
503 /* Get substring from string up to char c, advance string pointer past
507 get_substring (char **p, int c)
522 /* Physname gets strcat'd onto sname in order to recreate the mangled
523 name (see funtion gdb_mangle_name in gdbtypes.c). For cfront, make
524 the physname look like that of g++ - take out the initial mangling
525 eg: for sname="a" and fname="foo__1aFPFs_i" return "FPFs_i" */
528 get_cfront_method_physname (char *fname)
531 /* FIXME would like to make this generic for g++ too, but
532 that is already handled in read_member_funcctions */
535 /* search ahead to find the start of the mangled suffix */
536 if (*p == '_' && *(p + 1) == '_') /* compiler generated; probably a ctor/dtor */
538 while (p && (unsigned) ((p + 1) - fname) < strlen (fname) && *(p + 1) != '_')
540 if (!(p && *p == '_' && *(p + 1) == '_'))
541 error ("Invalid mangled function name %s", fname);
542 p += 2; /* advance past '__' */
544 /* struct name length and name of type should come next; advance past it */
547 len = len * 10 + (*p - '0');
556 msg_unknown_complaint (const char *arg1)
558 complaint (&symfile_complaints, "Unsupported token in stabs string %s", arg1);
561 /* Read base classes within cfront class definition.
562 eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;;
565 A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;;
570 read_cfront_baseclasses (struct field_info *fip, char **pp, struct type *type,
571 struct objfile *objfile)
576 struct nextfield *new;
578 if (**pp == ';') /* no base classes; return */
584 /* first count base classes so we can allocate space before parsing */
585 for (p = *pp; p && *p && *p != ';'; p++)
590 bnum++; /* add one more for last one */
592 /* now parse the base classes until we get to the start of the methods
593 (code extracted and munged from read_baseclasses) */
594 ALLOCATE_CPLUS_STRUCT_TYPE (type);
595 TYPE_N_BASECLASSES (type) = bnum;
599 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
602 pointer = (char *) TYPE_ALLOC (type, num_bytes);
603 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
605 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
607 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
609 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
610 make_cleanup (xfree, new);
611 memset (new, 0, sizeof (struct nextfield));
612 new->next = fip->list;
614 FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */
616 STABS_CONTINUE (pp, objfile);
618 /* virtual? eg: v2@Bvir */
621 SET_TYPE_FIELD_VIRTUAL (type, i);
625 /* access? eg: 2@Bvir */
626 /* Note: protected inheritance not supported in cfront */
629 case CFRONT_VISIBILITY_PRIVATE:
630 new->visibility = VISIBILITY_PRIVATE;
632 case CFRONT_VISIBILITY_PUBLIC:
633 new->visibility = VISIBILITY_PUBLIC;
636 /* Bad visibility format. Complain and treat it as
639 complaint (&symfile_complaints,
640 "Unknown visibility `%c' for baseclass",
642 new->visibility = VISIBILITY_PUBLIC;
646 /* "@" comes next - eg: @Bvir */
649 msg_unknown_complaint (*pp);
655 /* Set the bit offset of the portion of the object corresponding
656 to this baseclass. Always zero in the absence of
657 multiple inheritance. */
658 /* Unable to read bit position from stabs;
659 Assuming no multiple inheritance for now FIXME! */
660 /* We may have read this in the structure definition;
661 now we should fixup the members to be the actual base classes */
662 FIELD_BITPOS (new->field) = 0;
664 /* Get the base class name and type */
666 char *bname; /* base class name */
667 struct symbol *bsym; /* base class */
669 p1 = strchr (*pp, ' ');
670 p2 = strchr (*pp, ';');
672 bname = get_substring (pp, ' ');
674 bname = get_substring (pp, ';');
675 if (!bname || !*bname)
677 msg_unknown_complaint (*pp);
680 /* FIXME! attach base info to type */
681 bsym = lookup_symbol (bname, 0, STRUCT_NAMESPACE, 0, 0); /*demangled_name */
684 new->field.type = SYMBOL_TYPE (bsym);
685 new->field.name = type_name_no_tag (new->field.type);
689 complaint (&symfile_complaints, "Unable to find base type for %s",
695 /* If more base classes to parse, loop again.
696 We ate the last ' ' or ';' in get_substring,
697 so on exit we will have skipped the trailing ';' */
698 /* if invalid, return 0; add code to detect - FIXME! */
703 /* read cfront member functions.
704 pp points to string starting with list of functions
705 eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;;
706 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
707 A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;;
708 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
712 read_cfront_member_functions (struct field_info *fip, char **pp,
713 struct type *type, struct objfile *objfile)
715 /* This code extracted from read_member_functions
716 so as to do the similar thing for our funcs */
720 /* Total number of member functions defined in this class. If the class
721 defines two `f' functions, and one `g' function, then this will have
723 int total_length = 0;
727 struct next_fnfield *next;
728 struct fn_field fn_field;
731 struct type *look_ahead_type;
732 struct next_fnfieldlist *new_fnlist;
733 struct next_fnfield *new_sublist;
736 struct symbol *ref_func = 0;
738 /* Process each list until we find the end of the member functions.
739 eg: p = "__ct__1AFv foo__1AFv ;;;" */
741 STABS_CONTINUE (pp, objfile); /* handle \\ */
743 while (**pp != ';' && (fname = get_substring (pp, ' '), fname))
746 int sublist_count = 0;
748 if (fname[0] == '*') /* static member */
754 ref_func = lookup_symbol (fname, 0, VAR_NAMESPACE, 0, 0); /* demangled name */
757 complaint (&symfile_complaints,
758 "Unable to find function symbol for %s", fname);
762 look_ahead_type = NULL;
765 new_fnlist = (struct next_fnfieldlist *)
766 xmalloc (sizeof (struct next_fnfieldlist));
767 make_cleanup (xfree, new_fnlist);
768 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
770 /* The following is code to work around cfront generated stabs.
771 The stabs contains full mangled name for each field.
772 We try to demangle the name and extract the field name out of it. */
774 char *dem, *dem_p, *dem_args;
776 dem = cplus_demangle (fname, DMGL_ANSI | DMGL_PARAMS);
779 dem_p = strrchr (dem, ':');
780 if (dem_p != 0 && *(dem_p - 1) == ':')
782 /* get rid of args */
783 dem_args = strchr (dem_p, '(');
784 if (dem_args == NULL)
785 dem_len = strlen (dem_p);
787 dem_len = dem_args - dem_p;
789 obsavestring (dem_p, dem_len, &objfile->type_obstack);
794 obsavestring (fname, strlen (fname), &objfile->type_obstack);
796 } /* end of code for cfront work around */
798 new_fnlist->fn_fieldlist.name = main_fn_name;
800 /*-------------------------------------------------*/
801 /* Set up the sublists
802 Sublists are stuff like args, static, visibility, etc.
803 so in ARM, we have to set that info some other way.
804 Multiple sublists happen if overloading
805 eg: foo::26=##1;:;2A.;
806 In g++, we'd loop here thru all the sublists... */
809 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
810 make_cleanup (xfree, new_sublist);
811 memset (new_sublist, 0, sizeof (struct next_fnfield));
813 /* eat 1; from :;2A.; */
814 new_sublist->fn_field.type = SYMBOL_TYPE (ref_func); /* normally takes a read_type */
815 /* Make this type look like a method stub for gdb */
816 TYPE_FLAGS (new_sublist->fn_field.type) |= TYPE_FLAG_STUB;
817 TYPE_CODE (new_sublist->fn_field.type) = TYPE_CODE_METHOD;
819 /* If this is just a stub, then we don't have the real name here. */
820 if (TYPE_STUB (new_sublist->fn_field.type))
822 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
823 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
824 new_sublist->fn_field.is_stub = 1;
827 /* physname used later in mangling; eg PFs_i,5 for foo__1aFPFs_i
828 physname gets strcat'd in order to recreate the onto mangled name */
829 pname = get_cfront_method_physname (fname);
830 new_sublist->fn_field.physname = savestring (pname, strlen (pname));
833 /* Set this member function's visibility fields.
834 Unable to distinguish access from stabs definition!
835 Assuming public for now. FIXME!
836 (for private, set new_sublist->fn_field.is_private = 1,
837 for public, set new_sublist->fn_field.is_protected = 1) */
839 /* Unable to distinguish const/volatile from stabs definition!
840 Assuming normal for now. FIXME! */
842 new_sublist->fn_field.is_const = 0;
843 new_sublist->fn_field.is_volatile = 0; /* volatile not implemented in cfront */
845 /* Set virtual/static function info
846 How to get vtable offsets ?
847 Assuming normal for now FIXME!!
848 For vtables, figure out from whence this virtual function came.
849 It may belong to virtual function table of
850 one of its baseclasses.
852 new_sublist -> fn_field.voffset = vtable offset,
853 new_sublist -> fn_field.fcontext = look_ahead_type;
854 where look_ahead_type is type of baseclass */
856 new_sublist->fn_field.voffset = VOFFSET_STATIC;
857 else /* normal member function. */
858 new_sublist->fn_field.voffset = 0;
859 new_sublist->fn_field.fcontext = 0;
862 /* Prepare new sublist */
863 new_sublist->next = sublist;
864 sublist = new_sublist;
867 /* In g++, we loop thu sublists - now we set from functions. */
868 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
869 obstack_alloc (&objfile->type_obstack,
870 sizeof (struct fn_field) * length);
871 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
872 sizeof (struct fn_field) * length);
873 for (i = length; (i--, sublist); sublist = sublist->next)
875 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
878 new_fnlist->fn_fieldlist.length = length;
879 new_fnlist->next = fip->fnlist;
880 fip->fnlist = new_fnlist;
882 total_length += length;
883 STABS_CONTINUE (pp, objfile); /* handle \\ */
888 /* type should already have space */
889 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
890 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
891 memset (TYPE_FN_FIELDLISTS (type), 0,
892 sizeof (struct fn_fieldlist) * nfn_fields);
893 TYPE_NFN_FIELDS (type) = nfn_fields;
894 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
897 /* end of scope for reading member func */
901 /* Skip trailing ';' and bump count of number of fields seen */
909 /* This routine fixes up partial cfront types that were created
910 while parsing the stabs. The main need for this function is
911 to add information such as methods to classes.
912 Examples of "p": "sA;;__ct__1AFv foo__1AFv ;;;" */
914 resolve_cfront_continuation (struct objfile *objfile, struct symbol *sym,
917 struct symbol *ref_sym = 0;
919 /* snarfed from read_struct_type */
920 struct field_info fi;
922 struct cleanup *back_to;
924 /* Need to make sure that fi isn't gunna conflict with struct
925 in case struct already had some fnfs */
928 back_to = make_cleanup (null_cleanup, 0);
930 /* We only accept structs, classes and unions at the moment.
931 Other continuation types include t (typedef), r (long dbl), ...
932 We may want to add support for them as well;
933 right now they are handled by duplicating the symbol information
934 into the type information (see define_symbol) */
935 if (*p != 's' /* structs */
936 && *p != 'c' /* class */
937 && *p != 'u') /* union */
938 return 0; /* only handle C++ types */
941 /* Get symbol typs name and validate
942 eg: p = "A;;__ct__1AFv foo__1AFv ;;;" */
943 sname = get_substring (&p, ';');
944 if (!sname || strcmp (sname, SYMBOL_NAME (sym)))
945 error ("Internal error: base symbol type name does not match\n");
947 /* Find symbol's internal gdb reference using demangled_name.
948 This is the real sym that we want;
949 sym was a temp hack to make debugger happy */
950 ref_sym = lookup_symbol (SYMBOL_NAME (sym), 0, STRUCT_NAMESPACE, 0, 0);
951 type = SYMBOL_TYPE (ref_sym);
954 /* Now read the baseclasses, if any, read the regular C struct or C++
955 class member fields, attach the fields to the type, read the C++
956 member functions, attach them to the type, and then read any tilde
957 field (baseclass specifier for the class holding the main vtable). */
959 if (!read_cfront_baseclasses (&fi, &p, type, objfile)
960 /* g++ does this next, but cfront already did this:
961 || !read_struct_fields (&fi, &p, type, objfile) */
962 || !copy_cfront_struct_fields (&fi, type, objfile)
963 || !read_cfront_member_functions (&fi, &p, type, objfile)
964 || !read_cfront_static_fields (&fi, &p, type, objfile)
965 || !attach_fields_to_type (&fi, type, objfile)
966 || !attach_fn_fields_to_type (&fi, type)
967 /* g++ does this next, but cfront doesn't seem to have this:
968 || !read_tilde_fields (&fi, &p, type, objfile) */
971 type = error_type (&p, objfile);
974 do_cleanups (back_to);
977 /* End of code added to support parsing of ARM/Cfront stabs strings */
980 /* This routine fixes up symbol references/aliases to point to the original
981 symbol definition. Returns 0 on failure, non-zero on success. */
984 resolve_symbol_reference (struct objfile *objfile, struct symbol *sym, char *p)
987 struct symbol *ref_sym = 0;
988 struct alias_list *alias;
990 /* If this is not a symbol reference return now. */
994 /* Use "#<num>" as the name; we'll fix the name later.
995 We stored the original symbol name as "#<id>=<name>"
996 so we can now search for "#<id>" to resolving the reference.
997 We'll fix the names later by removing the "#<id>" or "#<id>=" */
999 /*---------------------------------------------------------*/
1000 /* Get the reference id number, and
1001 advance p past the names so we can parse the rest.
1002 eg: id=2 for p : "2=", "2=z:r(0,1)" "2:r(0,1);l(#5,#6),l(#7,#4)" */
1003 /*---------------------------------------------------------*/
1005 /* This gets reference name from string. sym may not have a name. */
1007 /* Get the reference number associated with the reference id in the
1008 gdb stab string. From that reference number, get the main/primary
1009 symbol for this alias. */
1010 refnum = process_reference (&p);
1011 ref_sym = ref_search (refnum);
1014 lrs_general_complaint ("symbol for reference not found");
1018 /* Parse the stab of the referencing symbol
1019 now that we have the referenced symbol.
1020 Add it as a new symbol and a link back to the referenced symbol.
1021 eg: p : "=", "=z:r(0,1)" ":r(0,1);l(#5,#6),l(#7,#4)" */
1024 /* If the stab symbol table and string contain:
1025 RSYM 0 5 00000000 868 #15=z:r(0,1)
1026 LBRAC 0 0 00000000 899 #5=
1027 SLINE 0 16 00000003 923 #6=
1028 Then the same symbols can be later referenced by:
1029 RSYM 0 5 00000000 927 #15:r(0,1);l(#5,#6)
1030 This is used in live range splitting to:
1031 1) specify that a symbol (#15) is actually just a new storage
1032 class for a symbol (#15=z) which was previously defined.
1033 2) specify that the beginning and ending ranges for a symbol
1034 (#15) are the values of the beginning (#5) and ending (#6)
1037 /* Read number as reference id.
1038 eg: p : "=", "=z:r(0,1)" ":r(0,1);l(#5,#6),l(#7,#4)" */
1039 /* FIXME! Might I want to use SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
1040 in case of "l(0,0)"? */
1042 /*--------------------------------------------------*/
1043 /* Add this symbol to the reference list. */
1044 /*--------------------------------------------------*/
1046 alias = (struct alias_list *) obstack_alloc (&objfile->type_obstack,
1047 sizeof (struct alias_list));
1050 lrs_general_complaint ("Unable to allocate alias list memory");
1057 if (!SYMBOL_ALIASES (ref_sym))
1059 SYMBOL_ALIASES (ref_sym) = alias;
1063 struct alias_list *temp;
1065 /* Get to the end of the list. */
1066 for (temp = SYMBOL_ALIASES (ref_sym);
1073 /* Want to fix up name so that other functions (eg. valops)
1074 will correctly print the name.
1075 Don't add_symbol_to_list so that lookup_symbol won't find it.
1076 nope... needed for fixups. */
1077 SYMBOL_NAME (sym) = SYMBOL_NAME (ref_sym);
1083 /* Structure for storing pointers to reference definitions for fast lookup
1084 during "process_later". */
1093 #define MAX_CHUNK_REFS 100
1094 #define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
1095 #define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)
1097 static struct ref_map *ref_map;
1099 /* Ptr to free cell in chunk's linked list. */
1100 static int ref_count = 0;
1102 /* Number of chunks malloced. */
1103 static int ref_chunk = 0;
1105 /* This file maintains a cache of stabs aliases found in the symbol
1106 table. If the symbol table changes, this cache must be cleared
1107 or we are left holding onto data in invalid obstacks. */
1109 stabsread_clear_cache (void)
1115 /* Create array of pointers mapping refids to symbols and stab strings.
1116 Add pointers to reference definition symbols and/or their values as we
1117 find them, using their reference numbers as our index.
1118 These will be used later when we resolve references. */
1120 ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
1124 if (refnum >= ref_count)
1125 ref_count = refnum + 1;
1126 if (ref_count > ref_chunk * MAX_CHUNK_REFS)
1128 int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
1129 int new_chunks = new_slots / MAX_CHUNK_REFS + 1;
1130 ref_map = (struct ref_map *)
1131 xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
1132 memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0, new_chunks * REF_CHUNK_SIZE);
1133 ref_chunk += new_chunks;
1135 ref_map[refnum].stabs = stabs;
1136 ref_map[refnum].sym = sym;
1137 ref_map[refnum].value = value;
1140 /* Return defined sym for the reference REFNUM. */
1142 ref_search (int refnum)
1144 if (refnum < 0 || refnum > ref_count)
1146 return ref_map[refnum].sym;
1149 /* Return value for the reference REFNUM. */
1152 ref_search_value (int refnum)
1154 if (refnum < 0 || refnum > ref_count)
1156 return ref_map[refnum].value;
1159 /* Parse a reference id in STRING and return the resulting
1160 reference number. Move STRING beyond the reference id. */
1163 process_reference (char **string)
1168 if (**string != '#')
1171 /* Advance beyond the initial '#'. */
1174 /* Read number as reference id. */
1175 while (*p && isdigit (*p))
1177 refnum = refnum * 10 + *p - '0';
1184 /* If STRING defines a reference, store away a pointer to the reference
1185 definition for later use. Return the reference number. */
1188 symbol_reference_defined (char **string)
1193 refnum = process_reference (&p);
1195 /* Defining symbols end in '=' */
1198 /* Symbol is being defined here. */
1204 /* Must be a reference. Either the symbol has already been defined,
1205 or this is a forward reference to it. */
1213 define_symbol (CORE_ADDR valu, char *string, int desc, int type,
1214 struct objfile *objfile)
1216 register struct symbol *sym;
1217 char *p = (char *) find_name_end (string);
1222 /* We would like to eliminate nameless symbols, but keep their types.
1223 E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
1224 to type 2, but, should not create a symbol to address that type. Since
1225 the symbol will be nameless, there is no way any user can refer to it. */
1229 /* Ignore syms with empty names. */
1233 /* Ignore old-style symbols from cc -go */
1240 p = strchr (p, ':');
1243 /* If a nameless stab entry, all we need is the type, not the symbol.
1244 e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
1245 nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
1247 current_symbol = sym = (struct symbol *)
1248 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
1249 memset (sym, 0, sizeof (struct symbol));
1251 switch (type & N_TYPE)
1254 SYMBOL_SECTION (sym) = SECT_OFF_TEXT (objfile);
1257 SYMBOL_SECTION (sym) = SECT_OFF_DATA (objfile);
1260 SYMBOL_SECTION (sym) = SECT_OFF_BSS (objfile);
1264 if (processing_gcc_compilation)
1266 /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
1267 number of bytes occupied by a type or object, which we ignore. */
1268 SYMBOL_LINE (sym) = desc;
1272 SYMBOL_LINE (sym) = 0; /* unknown */
1275 if (is_cplus_marker (string[0]))
1277 /* Special GNU C++ names. */
1281 SYMBOL_NAME (sym) = obsavestring ("this", strlen ("this"),
1282 &objfile->symbol_obstack);
1285 case 'v': /* $vtbl_ptr_type */
1286 /* Was: SYMBOL_NAME (sym) = "vptr"; */
1290 SYMBOL_NAME (sym) = obsavestring ("eh_throw", strlen ("eh_throw"),
1291 &objfile->symbol_obstack);
1295 /* This was an anonymous type that was never fixed up. */
1298 #ifdef STATIC_TRANSFORM_NAME
1300 /* SunPRO (3.0 at least) static variable encoding. */
1305 complaint (&symfile_complaints, "Unknown C++ symbol name `%s'",
1307 goto normal; /* Do *something* with it */
1310 else if (string[0] == '#')
1312 /* Special GNU C extension for referencing symbols. */
1316 /* If STRING defines a new reference id, then add it to the
1317 reference map. Else it must be referring to a previously
1318 defined symbol, so add it to the alias list of the previously
1321 refnum = symbol_reference_defined (&s);
1323 ref_add (refnum, sym, string, SYMBOL_VALUE (sym));
1324 else if (!resolve_symbol_reference (objfile, sym, string))
1327 /* S..P contains the name of the symbol. We need to store
1328 the correct name into SYMBOL_NAME. */
1334 SYMBOL_NAME (sym) = (char *)
1335 obstack_alloc (&objfile->symbol_obstack, nlen);
1336 strncpy (SYMBOL_NAME (sym), s, nlen);
1337 SYMBOL_NAME (sym)[nlen] = '\0';
1338 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
1341 /* FIXME! Want SYMBOL_NAME (sym) = 0;
1342 Get error if leave name 0. So give it something. */
1345 SYMBOL_NAME (sym) = (char *)
1346 obstack_alloc (&objfile->symbol_obstack, nlen);
1347 strncpy (SYMBOL_NAME (sym), string, nlen);
1348 SYMBOL_NAME (sym)[nlen] = '\0';
1349 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
1352 /* Advance STRING beyond the reference id. */
1358 SYMBOL_LANGUAGE (sym) = current_subfile->language;
1359 SYMBOL_NAME (sym) = (char *)
1360 obstack_alloc (&objfile->symbol_obstack, ((p - string) + 1));
1361 /* Open-coded memcpy--saves function call time. */
1362 /* FIXME: Does it really? Try replacing with simple strcpy and
1363 try it on an executable with a large symbol table. */
1364 /* FIXME: considering that gcc can open code memcpy anyway, I
1365 doubt it. xoxorich. */
1367 register char *p1 = string;
1368 register char *p2 = SYMBOL_NAME (sym);
1376 /* If this symbol is from a C++ compilation, then attempt to cache the
1377 demangled form for future reference. This is a typical time versus
1378 space tradeoff, that was decided in favor of time because it sped up
1379 C++ symbol lookups by a factor of about 20. */
1381 SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
1385 /* Determine the type of name being defined. */
1387 /* Getting GDB to correctly skip the symbol on an undefined symbol
1388 descriptor and not ever dump core is a very dodgy proposition if
1389 we do things this way. I say the acorn RISC machine can just
1390 fix their compiler. */
1391 /* The Acorn RISC machine's compiler can put out locals that don't
1392 start with "234=" or "(3,4)=", so assume anything other than the
1393 deftypes we know how to handle is a local. */
1394 if (!strchr ("cfFGpPrStTvVXCR", *p))
1396 if (isdigit (*p) || *p == '(' || *p == '-')
1405 /* c is a special case, not followed by a type-number.
1406 SYMBOL:c=iVALUE for an integer constant symbol.
1407 SYMBOL:c=rVALUE for a floating constant symbol.
1408 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
1409 e.g. "b:c=e6,0" for "const b = blob1"
1410 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
1413 SYMBOL_CLASS (sym) = LOC_CONST;
1414 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1415 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1416 add_symbol_to_list (sym, &file_symbols);
1424 double d = atof (p);
1427 /* FIXME-if-picky-about-floating-accuracy: Should be using
1428 target arithmetic to get the value. real.c in GCC
1429 probably has the necessary code. */
1431 /* FIXME: lookup_fundamental_type is a hack. We should be
1432 creating a type especially for the type of float constants.
1433 Problem is, what type should it be?
1435 Also, what should the name of this type be? Should we
1436 be using 'S' constants (see stabs.texinfo) instead? */
1438 SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile,
1441 obstack_alloc (&objfile->symbol_obstack,
1442 TYPE_LENGTH (SYMBOL_TYPE (sym)));
1443 store_typed_floating (dbl_valu, SYMBOL_TYPE (sym), d);
1444 SYMBOL_VALUE_BYTES (sym) = dbl_valu;
1445 SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
1450 /* Defining integer constants this way is kind of silly,
1451 since 'e' constants allows the compiler to give not
1452 only the value, but the type as well. C has at least
1453 int, long, unsigned int, and long long as constant
1454 types; other languages probably should have at least
1455 unsigned as well as signed constants. */
1457 /* We just need one int constant type for all objfiles.
1458 It doesn't depend on languages or anything (arguably its
1459 name should be a language-specific name for a type of
1460 that size, but I'm inclined to say that if the compiler
1461 wants a nice name for the type, it can use 'e'). */
1462 static struct type *int_const_type;
1464 /* Yes, this is as long as a *host* int. That is because we
1466 if (int_const_type == NULL)
1468 init_type (TYPE_CODE_INT,
1469 sizeof (int) * HOST_CHAR_BIT / TARGET_CHAR_BIT, 0,
1471 (struct objfile *) NULL);
1472 SYMBOL_TYPE (sym) = int_const_type;
1473 SYMBOL_VALUE (sym) = atoi (p);
1474 SYMBOL_CLASS (sym) = LOC_CONST;
1478 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
1479 can be represented as integral.
1480 e.g. "b:c=e6,0" for "const b = blob1"
1481 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
1483 SYMBOL_CLASS (sym) = LOC_CONST;
1484 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1488 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1493 /* If the value is too big to fit in an int (perhaps because
1494 it is unsigned), or something like that, we silently get
1495 a bogus value. The type and everything else about it is
1496 correct. Ideally, we should be using whatever we have
1497 available for parsing unsigned and long long values,
1499 SYMBOL_VALUE (sym) = atoi (p);
1504 SYMBOL_CLASS (sym) = LOC_CONST;
1505 SYMBOL_TYPE (sym) = error_type (&p, objfile);
1508 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1509 add_symbol_to_list (sym, &file_symbols);
1513 /* The name of a caught exception. */
1514 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1515 SYMBOL_CLASS (sym) = LOC_LABEL;
1516 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1517 SYMBOL_VALUE_ADDRESS (sym) = valu;
1518 add_symbol_to_list (sym, &local_symbols);
1522 /* A static function definition. */
1523 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1524 SYMBOL_CLASS (sym) = LOC_BLOCK;
1525 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1526 add_symbol_to_list (sym, &file_symbols);
1527 /* fall into process_function_types. */
1529 process_function_types:
1530 /* Function result types are described as the result type in stabs.
1531 We need to convert this to the function-returning-type-X type
1532 in GDB. E.g. "int" is converted to "function returning int". */
1533 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
1534 SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
1536 /* All functions in C++ have prototypes. Stabs does not offer an
1537 explicit way to identify prototyped or unprototyped functions,
1538 but both GCC and Sun CC emit stabs for the "call-as" type rather
1539 than the "declared-as" type for unprototyped functions, so
1540 we treat all functions as if they were prototyped. This is used
1541 primarily for promotion when calling the function from GDB. */
1542 TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED;
1544 /* fall into process_prototype_types */
1546 process_prototype_types:
1547 /* Sun acc puts declared types of arguments here. */
1550 struct type *ftype = SYMBOL_TYPE (sym);
1555 /* Obtain a worst case guess for the number of arguments
1556 by counting the semicolons. */
1563 /* Allocate parameter information fields and fill them in. */
1564 TYPE_FIELDS (ftype) = (struct field *)
1565 TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
1570 /* A type number of zero indicates the start of varargs.
1571 FIXME: GDB currently ignores vararg functions. */
1572 if (p[0] == '0' && p[1] == '\0')
1574 ptype = read_type (&p, objfile);
1576 /* The Sun compilers mark integer arguments, which should
1577 be promoted to the width of the calling conventions, with
1578 a type which references itself. This type is turned into
1579 a TYPE_CODE_VOID type by read_type, and we have to turn
1580 it back into builtin_type_int here.
1581 FIXME: Do we need a new builtin_type_promoted_int_arg ? */
1582 if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
1583 ptype = builtin_type_int;
1584 TYPE_FIELD_TYPE (ftype, nparams) = ptype;
1585 TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
1587 TYPE_NFIELDS (ftype) = nparams;
1588 TYPE_FLAGS (ftype) |= TYPE_FLAG_PROTOTYPED;
1593 /* A global function definition. */
1594 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1595 SYMBOL_CLASS (sym) = LOC_BLOCK;
1596 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1597 add_symbol_to_list (sym, &global_symbols);
1598 goto process_function_types;
1601 /* For a class G (global) symbol, it appears that the
1602 value is not correct. It is necessary to search for the
1603 corresponding linker definition to find the value.
1604 These definitions appear at the end of the namelist. */
1605 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1606 SYMBOL_CLASS (sym) = LOC_STATIC;
1607 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1608 /* Don't add symbol references to global_sym_chain.
1609 Symbol references don't have valid names and wont't match up with
1610 minimal symbols when the global_sym_chain is relocated.
1611 We'll fixup symbol references when we fixup the defining symbol. */
1612 if (SYMBOL_NAME (sym) && SYMBOL_NAME (sym)[0] != '#')
1614 i = hashname (SYMBOL_NAME (sym));
1615 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
1616 global_sym_chain[i] = sym;
1618 add_symbol_to_list (sym, &global_symbols);
1621 /* This case is faked by a conditional above,
1622 when there is no code letter in the dbx data.
1623 Dbx data never actually contains 'l'. */
1626 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1627 SYMBOL_CLASS (sym) = LOC_LOCAL;
1628 SYMBOL_VALUE (sym) = valu;
1629 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1630 add_symbol_to_list (sym, &local_symbols);
1635 /* pF is a two-letter code that means a function parameter in Fortran.
1636 The type-number specifies the type of the return value.
1637 Translate it into a pointer-to-function type. */
1641 = lookup_pointer_type
1642 (lookup_function_type (read_type (&p, objfile)));
1645 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1647 /* Normally this is a parameter, a LOC_ARG. On the i960, it
1648 can also be a LOC_LOCAL_ARG depending on symbol type. */
1649 #ifndef DBX_PARM_SYMBOL_CLASS
1650 #define DBX_PARM_SYMBOL_CLASS(type) LOC_ARG
1653 SYMBOL_CLASS (sym) = DBX_PARM_SYMBOL_CLASS (type);
1654 SYMBOL_VALUE (sym) = valu;
1655 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1656 add_symbol_to_list (sym, &local_symbols);
1658 if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG)
1660 /* On little-endian machines, this crud is never necessary,
1661 and, if the extra bytes contain garbage, is harmful. */
1665 /* If it's gcc-compiled, if it says `short', believe it. */
1666 if (processing_gcc_compilation || BELIEVE_PCC_PROMOTION)
1669 if (!BELIEVE_PCC_PROMOTION)
1671 /* This is the signed type which arguments get promoted to. */
1672 static struct type *pcc_promotion_type;
1673 /* This is the unsigned type which arguments get promoted to. */
1674 static struct type *pcc_unsigned_promotion_type;
1676 /* Call it "int" because this is mainly C lossage. */
1677 if (pcc_promotion_type == NULL)
1678 pcc_promotion_type =
1679 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
1682 if (pcc_unsigned_promotion_type == NULL)
1683 pcc_unsigned_promotion_type =
1684 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
1685 TYPE_FLAG_UNSIGNED, "unsigned int", NULL);
1687 if (BELIEVE_PCC_PROMOTION_TYPE)
1689 /* This is defined on machines (e.g. sparc) where we
1690 should believe the type of a PCC 'short' argument,
1691 but shouldn't believe the address (the address is the
1692 address of the corresponding int).
1694 My guess is that this correction, as opposed to
1695 changing the parameter to an 'int' (as done below,
1696 for PCC on most machines), is the right thing to do
1697 on all machines, but I don't want to risk breaking
1698 something that already works. On most PCC machines,
1699 the sparc problem doesn't come up because the calling
1700 function has to zero the top bytes (not knowing
1701 whether the called function wants an int or a short),
1702 so there is little practical difference between an
1703 int and a short (except perhaps what happens when the
1704 GDB user types "print short_arg = 0x10000;").
1706 Hacked for SunOS 4.1 by gnu@cygnus.com. In 4.1, the
1707 compiler actually produces the correct address (we
1708 don't need to fix it up). I made this code adapt so
1709 that it will offset the symbol if it was pointing at
1710 an int-aligned location and not otherwise. This way
1711 you can use the same gdb for 4.0.x and 4.1 systems.
1713 If the parameter is shorter than an int, and is
1714 integral (e.g. char, short, or unsigned equivalent),
1715 and is claimed to be passed on an integer boundary,
1716 don't believe it! Offset the parameter's address to
1717 the tail-end of that integer. */
1719 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type)
1720 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT
1721 && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (pcc_promotion_type))
1723 SYMBOL_VALUE (sym) += TYPE_LENGTH (pcc_promotion_type)
1724 - TYPE_LENGTH (SYMBOL_TYPE (sym));
1730 /* If PCC says a parameter is a short or a char,
1731 it is really an int. */
1732 if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type)
1733 && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
1736 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
1737 ? pcc_unsigned_promotion_type
1738 : pcc_promotion_type;
1745 /* acc seems to use P to declare the prototypes of functions that
1746 are referenced by this file. gdb is not prepared to deal
1747 with this extra information. FIXME, it ought to. */
1750 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1751 goto process_prototype_types;
1756 /* Parameter which is in a register. */
1757 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1758 SYMBOL_CLASS (sym) = LOC_REGPARM;
1759 SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
1760 if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS)
1762 reg_value_complaint (SYMBOL_VALUE (sym),
1763 NUM_REGS + NUM_PSEUDO_REGS,
1764 SYMBOL_SOURCE_NAME (sym));
1765 SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
1767 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1768 add_symbol_to_list (sym, &local_symbols);
1772 /* Register variable (either global or local). */
1773 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1774 SYMBOL_CLASS (sym) = LOC_REGISTER;
1775 SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
1776 if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS)
1778 reg_value_complaint (SYMBOL_VALUE (sym),
1779 NUM_REGS + NUM_PSEUDO_REGS,
1780 SYMBOL_SOURCE_NAME (sym));
1781 SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
1783 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1784 if (within_function)
1786 /* Sun cc uses a pair of symbols, one 'p' and one 'r' with the same
1787 name to represent an argument passed in a register.
1788 GCC uses 'P' for the same case. So if we find such a symbol pair
1789 we combine it into one 'P' symbol. For Sun cc we need to do this
1790 regardless of REG_STRUCT_HAS_ADDR, because the compiler puts out
1791 the 'p' symbol even if it never saves the argument onto the stack.
1793 On most machines, we want to preserve both symbols, so that
1794 we can still get information about what is going on with the
1795 stack (VAX for computing args_printed, using stack slots instead
1796 of saved registers in backtraces, etc.).
1798 Note that this code illegally combines
1799 main(argc) struct foo argc; { register struct foo argc; }
1800 but this case is considered pathological and causes a warning
1801 from a decent compiler. */
1804 && local_symbols->nsyms > 0
1805 #ifndef USE_REGISTER_NOT_ARG
1806 && REG_STRUCT_HAS_ADDR_P ()
1807 && REG_STRUCT_HAS_ADDR (processing_gcc_compilation,
1809 && (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1810 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION
1811 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_SET
1812 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_BITSTRING)
1816 struct symbol *prev_sym;
1817 prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
1818 if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
1819 || SYMBOL_CLASS (prev_sym) == LOC_ARG)
1820 && STREQ (SYMBOL_NAME (prev_sym), SYMBOL_NAME (sym)))
1822 SYMBOL_CLASS (prev_sym) = LOC_REGPARM;
1823 /* Use the type from the LOC_REGISTER; that is the type
1824 that is actually in that register. */
1825 SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
1826 SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
1831 add_symbol_to_list (sym, &local_symbols);
1834 add_symbol_to_list (sym, &file_symbols);
1838 /* Static symbol at top level of file */
1839 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1840 SYMBOL_CLASS (sym) = LOC_STATIC;
1841 SYMBOL_VALUE_ADDRESS (sym) = valu;
1842 #ifdef STATIC_TRANSFORM_NAME
1843 if (IS_STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym)))
1845 struct minimal_symbol *msym;
1846 msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile);
1849 SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym));
1850 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
1854 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1855 add_symbol_to_list (sym, &file_symbols);
1860 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1862 /* For a nameless type, we don't want a create a symbol, thus we
1863 did not use `sym'. Return without further processing. */
1867 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1868 SYMBOL_VALUE (sym) = valu;
1869 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1870 /* C++ vagaries: we may have a type which is derived from
1871 a base type which did not have its name defined when the
1872 derived class was output. We fill in the derived class's
1873 base part member's name here in that case. */
1874 if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
1875 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
1876 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
1877 && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
1880 for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
1881 if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
1882 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
1883 type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
1886 if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
1888 /* gcc-2.6 or later (when using -fvtable-thunks)
1889 emits a unique named type for a vtable entry.
1890 Some gdb code depends on that specific name. */
1891 extern const char vtbl_ptr_name[];
1893 if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
1894 && strcmp (SYMBOL_NAME (sym), vtbl_ptr_name))
1895 || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
1897 /* If we are giving a name to a type such as "pointer to
1898 foo" or "function returning foo", we better not set
1899 the TYPE_NAME. If the program contains "typedef char
1900 *caddr_t;", we don't want all variables of type char
1901 * to print as caddr_t. This is not just a
1902 consequence of GDB's type management; PCC and GCC (at
1903 least through version 2.4) both output variables of
1904 either type char * or caddr_t with the type number
1905 defined in the 't' symbol for caddr_t. If a future
1906 compiler cleans this up it GDB is not ready for it
1907 yet, but if it becomes ready we somehow need to
1908 disable this check (without breaking the PCC/GCC2.4
1913 Fortunately, this check seems not to be necessary
1914 for anything except pointers or functions. */
1915 /* ezannoni: 2000-10-26. This seems to apply for
1916 versions of gcc older than 2.8. This was the original
1917 problem: with the following code gdb would tell that
1918 the type for name1 is caddr_t, and func is char()
1919 typedef char *caddr_t;
1931 /* Pascal accepts names for pointer types. */
1932 if (current_subfile->language == language_pascal)
1934 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NAME (sym);
1938 TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NAME (sym);
1941 add_symbol_to_list (sym, &file_symbols);
1945 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1946 by 't' which means we are typedef'ing it as well. */
1947 synonym = *p == 't';
1951 /* The semantics of C++ state that "struct foo { ... }" also defines
1952 a typedef for "foo". Unfortunately, cfront never makes the typedef
1953 when translating C++ into C. We make the typedef here so that
1954 "ptype foo" works as expected for cfront translated code. */
1955 else if ((current_subfile->language == language_cplus)
1956 || (current_subfile->language == language_objc))
1959 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1961 /* For a nameless type, we don't want a create a symbol, thus we
1962 did not use `sym'. Return without further processing. */
1966 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
1967 SYMBOL_VALUE (sym) = valu;
1968 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
1969 if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
1970 TYPE_TAG_NAME (SYMBOL_TYPE (sym))
1971 = obconcat (&objfile->type_obstack, "", "", SYMBOL_NAME (sym));
1972 add_symbol_to_list (sym, &file_symbols);
1976 /* Clone the sym and then modify it. */
1977 register struct symbol *typedef_sym = (struct symbol *)
1978 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
1979 *typedef_sym = *sym;
1980 SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF;
1981 SYMBOL_VALUE (typedef_sym) = valu;
1982 SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
1983 if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
1984 TYPE_NAME (SYMBOL_TYPE (sym))
1985 = obconcat (&objfile->type_obstack, "", "", SYMBOL_NAME (sym));
1986 add_symbol_to_list (typedef_sym, &file_symbols);
1991 /* Static symbol of local scope */
1992 SYMBOL_TYPE (sym) = read_type (&p, objfile);
1993 SYMBOL_CLASS (sym) = LOC_STATIC;
1994 SYMBOL_VALUE_ADDRESS (sym) = valu;
1995 #ifdef STATIC_TRANSFORM_NAME
1996 if (IS_STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym)))
1998 struct minimal_symbol *msym;
1999 msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile);
2002 SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym));
2003 SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
2007 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2008 add_symbol_to_list (sym, &local_symbols);
2012 /* Reference parameter */
2013 SYMBOL_TYPE (sym) = read_type (&p, objfile);
2014 SYMBOL_CLASS (sym) = LOC_REF_ARG;
2015 SYMBOL_VALUE (sym) = valu;
2016 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2017 add_symbol_to_list (sym, &local_symbols);
2021 /* Reference parameter which is in a register. */
2022 SYMBOL_TYPE (sym) = read_type (&p, objfile);
2023 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
2024 SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
2025 if (SYMBOL_VALUE (sym) >= NUM_REGS + NUM_PSEUDO_REGS)
2027 reg_value_complaint (SYMBOL_VALUE (sym),
2028 NUM_REGS + NUM_PSEUDO_REGS,
2029 SYMBOL_SOURCE_NAME (sym));
2030 SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
2032 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2033 add_symbol_to_list (sym, &local_symbols);
2037 /* This is used by Sun FORTRAN for "function result value".
2038 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
2039 that Pascal uses it too, but when I tried it Pascal used
2040 "x:3" (local symbol) instead. */
2041 SYMBOL_TYPE (sym) = read_type (&p, objfile);
2042 SYMBOL_CLASS (sym) = LOC_LOCAL;
2043 SYMBOL_VALUE (sym) = valu;
2044 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2045 add_symbol_to_list (sym, &local_symbols);
2048 /* New code added to support cfront stabs strings.
2049 Note: case 'P' already handled above */
2051 /* Cfront type continuation coming up!
2052 Find the original definition and add to it.
2053 We'll have to do this for the typedef too,
2054 since we cloned the symbol to define a type in read_type.
2055 Stabs info examples:
2057 foo__1CFv :ZtF (first def foo__1CFv:F(0,3);(0,24))
2058 C:ZsC;;__ct__1CFv func1__1CFv func2__1CFv ... ;;;
2059 where C is the name of the class.
2060 Unfortunately, we can't lookup the original symbol yet 'cuz
2061 we haven't finished reading all the symbols.
2062 Instead, we save it for processing later */
2063 process_later (sym, p, resolve_cfront_continuation);
2064 SYMBOL_TYPE (sym) = error_type (&p, objfile); /* FIXME! change later */
2065 SYMBOL_CLASS (sym) = LOC_CONST;
2066 SYMBOL_VALUE (sym) = 0;
2067 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2068 /* Don't add to list - we'll delete it later when
2069 we add the continuation to the real sym */
2071 /* End of new code added to support cfront stabs strings */
2074 SYMBOL_TYPE (sym) = error_type (&p, objfile);
2075 SYMBOL_CLASS (sym) = LOC_CONST;
2076 SYMBOL_VALUE (sym) = 0;
2077 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
2078 add_symbol_to_list (sym, &file_symbols);
2082 /* When passing structures to a function, some systems sometimes pass
2083 the address in a register, not the structure itself. */
2085 if (REG_STRUCT_HAS_ADDR_P ()
2086 && REG_STRUCT_HAS_ADDR (processing_gcc_compilation, SYMBOL_TYPE (sym))
2087 && (SYMBOL_CLASS (sym) == LOC_REGPARM || SYMBOL_CLASS (sym) == LOC_ARG))
2089 struct type *symbol_type = check_typedef (SYMBOL_TYPE (sym));
2091 if ((TYPE_CODE (symbol_type) == TYPE_CODE_STRUCT)
2092 || (TYPE_CODE (symbol_type) == TYPE_CODE_UNION)
2093 || (TYPE_CODE (symbol_type) == TYPE_CODE_BITSTRING)
2094 || (TYPE_CODE (symbol_type) == TYPE_CODE_SET))
2096 /* If REG_STRUCT_HAS_ADDR yields non-zero we have to convert
2097 LOC_REGPARM to LOC_REGPARM_ADDR for structures and unions. */
2098 if (SYMBOL_CLASS (sym) == LOC_REGPARM)
2099 SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
2100 /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
2101 and subsequent arguments on the sparc, for example). */
2102 else if (SYMBOL_CLASS (sym) == LOC_ARG)
2103 SYMBOL_CLASS (sym) = LOC_REF_ARG;
2107 /* Is there more to parse? For example LRS/alias information? */
2108 while (*p && *p == ';')
2111 if (*p && p[0] == 'l' && p[1] == '(')
2113 /* GNU extensions for live range splitting may be appended to
2114 the end of the stab string. eg. "l(#1,#2);l(#3,#5)" */
2116 /* Resolve the live range and add it to SYM's live range list. */
2117 if (!resolve_live_range (objfile, sym, p))
2120 /* Find end of live range info. */
2121 p = strchr (p, ')');
2122 if (!*p || *p != ')')
2124 lrs_general_complaint ("live range format not recognized");
2133 /* Add the live range found in P to the symbol SYM in objfile OBJFILE. Returns
2134 non-zero on success, zero otherwise. */
2137 resolve_live_range (struct objfile *objfile, struct symbol *sym, char *p)
2140 CORE_ADDR start, end;
2142 /* Sanity check the beginning of the stabs string. */
2143 if (!*p || *p != 'l')
2145 lrs_general_complaint ("live range string 1");
2150 if (!*p || *p != '(')
2152 lrs_general_complaint ("live range string 2");
2157 /* Get starting value of range and advance P past the reference id.
2159 ?!? In theory, the process_reference should never fail, but we should
2160 catch that case just in case the compiler scrogged the stabs. */
2161 refnum = process_reference (&p);
2162 start = ref_search_value (refnum);
2165 lrs_general_complaint ("Live range symbol not found 1");
2169 if (!*p || *p != ',')
2171 lrs_general_complaint ("live range string 3");
2176 /* Get ending value of range and advance P past the reference id.
2178 ?!? In theory, the process_reference should never fail, but we should
2179 catch that case just in case the compiler scrogged the stabs. */
2180 refnum = process_reference (&p);
2181 end = ref_search_value (refnum);
2184 lrs_general_complaint ("Live range symbol not found 2");
2188 if (!*p || *p != ')')
2190 lrs_general_complaint ("live range string 4");
2194 /* Now that we know the bounds of the range, add it to the
2196 add_live_range (objfile, sym, start, end);
2201 /* Add a new live range defined by START and END to the symbol SYM
2202 in objfile OBJFILE. */
2205 add_live_range (struct objfile *objfile, struct symbol *sym, CORE_ADDR start,
2208 struct range_list *r, *rs;
2212 lrs_general_complaint ("end of live range follows start");
2216 /* Alloc new live range structure. */
2217 r = (struct range_list *)
2218 obstack_alloc (&objfile->type_obstack,
2219 sizeof (struct range_list));
2224 /* Append this range to the symbol's range list. */
2225 if (!SYMBOL_RANGES (sym))
2226 SYMBOL_RANGES (sym) = r;
2229 /* Get the last range for the symbol. */
2230 for (rs = SYMBOL_RANGES (sym); rs->next; rs = rs->next)
2237 /* Skip rest of this symbol and return an error type.
2239 General notes on error recovery: error_type always skips to the
2240 end of the symbol (modulo cretinous dbx symbol name continuation).
2241 Thus code like this:
2243 if (*(*pp)++ != ';')
2244 return error_type (pp, objfile);
2246 is wrong because if *pp starts out pointing at '\0' (typically as the
2247 result of an earlier error), it will be incremented to point to the
2248 start of the next symbol, which might produce strange results, at least
2249 if you run off the end of the string table. Instead use
2252 return error_type (pp, objfile);
2258 foo = error_type (pp, objfile);
2262 And in case it isn't obvious, the point of all this hair is so the compiler
2263 can define new types and new syntaxes, and old versions of the
2264 debugger will be able to read the new symbol tables. */
2266 static struct type *
2267 error_type (char **pp, struct objfile *objfile)
2269 complaint (&symfile_complaints, "couldn't parse type; debugger out of date?");
2272 /* Skip to end of symbol. */
2273 while (**pp != '\0')
2278 /* Check for and handle cretinous dbx symbol name continuation! */
2279 if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
2281 *pp = next_symbol_text (objfile);
2288 return (builtin_type_error);
2292 /* Read type information or a type definition; return the type. Even
2293 though this routine accepts either type information or a type
2294 definition, the distinction is relevant--some parts of stabsread.c
2295 assume that type information starts with a digit, '-', or '(' in
2296 deciding whether to call read_type. */
2299 read_type (register char **pp, struct objfile *objfile)
2301 register struct type *type = 0;
2304 char type_descriptor;
2306 /* Size in bits of type if specified by a type attribute, or -1 if
2307 there is no size attribute. */
2310 /* Used to distinguish string and bitstring from char-array and set. */
2313 /* Used to distinguish vector from array. */
2316 /* Read type number if present. The type number may be omitted.
2317 for instance in a two-dimensional array declared with type
2318 "ar1;1;10;ar1;1;10;4". */
2319 if ((**pp >= '0' && **pp <= '9')
2323 if (read_type_number (pp, typenums) != 0)
2324 return error_type (pp, objfile);
2326 /* Type is not being defined here. Either it already exists,
2327 or this is a forward reference to it. dbx_alloc_type handles
2330 return dbx_alloc_type (typenums, objfile);
2332 /* Type is being defined here. */
2334 Also skip the type descriptor - we get it below with (*pp)[-1]. */
2339 /* 'typenums=' not present, type is anonymous. Read and return
2340 the definition, but don't put it in the type vector. */
2341 typenums[0] = typenums[1] = -1;
2346 type_descriptor = (*pp)[-1];
2347 switch (type_descriptor)
2351 enum type_code code;
2353 /* Used to index through file_symbols. */
2354 struct pending *ppt;
2357 /* Name including "struct", etc. */
2361 char *from, *to, *p, *q1, *q2;
2363 /* Set the type code according to the following letter. */
2367 code = TYPE_CODE_STRUCT;
2370 code = TYPE_CODE_UNION;
2373 code = TYPE_CODE_ENUM;
2377 /* Complain and keep going, so compilers can invent new
2378 cross-reference types. */
2379 complaint (&symfile_complaints,
2380 "Unrecognized cross-reference type `%c'", (*pp)[0]);
2381 code = TYPE_CODE_STRUCT;
2386 q1 = strchr (*pp, '<');
2387 p = strchr (*pp, ':');
2389 return error_type (pp, objfile);
2390 if (q1 && p > q1 && p[1] == ':')
2392 int nesting_level = 0;
2393 for (q2 = q1; *q2; q2++)
2397 else if (*q2 == '>')
2399 else if (*q2 == ':' && nesting_level == 0)
2404 return error_type (pp, objfile);
2407 (char *) obstack_alloc (&objfile->type_obstack, p - *pp + 1);
2409 /* Copy the name. */
2415 /* Set the pointer ahead of the name which we just read, and
2420 /* Now check to see whether the type has already been
2421 declared. This was written for arrays of cross-referenced
2422 types before we had TYPE_CODE_TARGET_STUBBED, so I'm pretty
2423 sure it is not necessary anymore. But it might be a good
2424 idea, to save a little memory. */
2426 for (ppt = file_symbols; ppt; ppt = ppt->next)
2427 for (i = 0; i < ppt->nsyms; i++)
2429 struct symbol *sym = ppt->symbol[i];
2431 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
2432 && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
2433 && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
2434 && STREQ (SYMBOL_NAME (sym), type_name))
2436 obstack_free (&objfile->type_obstack, type_name);
2437 type = SYMBOL_TYPE (sym);
2442 /* Didn't find the type to which this refers, so we must
2443 be dealing with a forward reference. Allocate a type
2444 structure for it, and keep track of it so we can
2445 fill in the rest of the fields when we get the full
2447 type = dbx_alloc_type (typenums, objfile);
2448 TYPE_CODE (type) = code;
2449 TYPE_TAG_NAME (type) = type_name;
2450 INIT_CPLUS_SPECIFIC (type);
2451 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
2453 add_undefined_type (type);
2457 case '-': /* RS/6000 built-in type */
2471 /* We deal with something like t(1,2)=(3,4)=... which
2472 the Lucid compiler and recent gcc versions (post 2.7.3) use. */
2474 /* Allocate and enter the typedef type first.
2475 This handles recursive types. */
2476 type = dbx_alloc_type (typenums, objfile);
2477 TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
2479 struct type *xtype = read_type (pp, objfile);
2482 /* It's being defined as itself. That means it is "void". */
2483 TYPE_CODE (type) = TYPE_CODE_VOID;
2484 TYPE_LENGTH (type) = 1;
2486 else if (type_size >= 0 || is_string)
2488 /* This is the absolute wrong way to construct types. Every
2489 other debug format has found a way around this problem and
2490 the related problems with unnecessarily stubbed types;
2491 someone motivated should attempt to clean up the issue
2492 here as well. Once a type pointed to has been created it
2493 should not be modified.
2495 Well, it's not *absolutely* wrong. Constructing recursive
2496 types (trees, linked lists) necessarily entails modifying
2497 types after creating them. Constructing any loop structure
2498 entails side effects. The Dwarf 2 reader does handle this
2499 more gracefully (it never constructs more than once
2500 instance of a type object, so it doesn't have to copy type
2501 objects wholesale), but it still mutates type objects after
2502 other folks have references to them.
2504 Keep in mind that this circularity/mutation issue shows up
2505 at the source language level, too: C's "incomplete types",
2506 for example. So the proper cleanup, I think, would be to
2507 limit GDB's type smashing to match exactly those required
2508 by the source language. So GDB could have a
2509 "complete_this_type" function, but never create unnecessary
2510 copies of a type otherwise. */
2511 replace_type (type, xtype);
2512 TYPE_NAME (type) = NULL;
2513 TYPE_TAG_NAME (type) = NULL;
2517 TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
2518 TYPE_TARGET_TYPE (type) = xtype;
2523 /* In the following types, we must be sure to overwrite any existing
2524 type that the typenums refer to, rather than allocating a new one
2525 and making the typenums point to the new one. This is because there
2526 may already be pointers to the existing type (if it had been
2527 forward-referenced), and we must change it to a pointer, function,
2528 reference, or whatever, *in-place*. */
2530 case '*': /* Pointer to another type */
2531 type1 = read_type (pp, objfile);
2532 type = make_pointer_type (type1, dbx_lookup_type (typenums));
2535 case '&': /* Reference to another type */
2536 type1 = read_type (pp, objfile);
2537 type = make_reference_type (type1, dbx_lookup_type (typenums));
2540 case 'f': /* Function returning another type */
2541 type1 = read_type (pp, objfile);
2542 type = make_function_type (type1, dbx_lookup_type (typenums));
2545 case 'g': /* Prototyped function. (Sun) */
2547 /* Unresolved questions:
2549 - According to Sun's ``STABS Interface Manual'', for 'f'
2550 and 'F' symbol descriptors, a `0' in the argument type list
2551 indicates a varargs function. But it doesn't say how 'g'
2552 type descriptors represent that info. Someone with access
2553 to Sun's toolchain should try it out.
2555 - According to the comment in define_symbol (search for
2556 `process_prototype_types:'), Sun emits integer arguments as
2557 types which ref themselves --- like `void' types. Do we
2558 have to deal with that here, too? Again, someone with
2559 access to Sun's toolchain should try it out and let us
2562 const char *type_start = (*pp) - 1;
2563 struct type *return_type = read_type (pp, objfile);
2564 struct type *func_type
2565 = make_function_type (return_type, dbx_lookup_type (typenums));
2568 struct type_list *next;
2572 while (**pp && **pp != '#')
2574 struct type *arg_type = read_type (pp, objfile);
2575 struct type_list *new = alloca (sizeof (*new));
2576 new->type = arg_type;
2577 new->next = arg_types;
2585 complaint (&symfile_complaints,
2586 "Prototyped function type didn't end arguments with `#':\n%s",
2590 /* If there is just one argument whose type is `void', then
2591 that's just an empty argument list. */
2593 && ! arg_types->next
2594 && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
2597 TYPE_FIELDS (func_type)
2598 = (struct field *) TYPE_ALLOC (func_type,
2599 num_args * sizeof (struct field));
2600 memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
2603 struct type_list *t;
2605 /* We stuck each argument type onto the front of the list
2606 when we read it, so the list is reversed. Build the
2607 fields array right-to-left. */
2608 for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
2609 TYPE_FIELD_TYPE (func_type, i) = t->type;
2611 TYPE_NFIELDS (func_type) = num_args;
2612 TYPE_FLAGS (func_type) |= TYPE_FLAG_PROTOTYPED;
2618 case 'k': /* Const qualifier on some type (Sun) */
2619 type = read_type (pp, objfile);
2620 type = make_cv_type (1, TYPE_VOLATILE (type), type,
2621 dbx_lookup_type (typenums));
2624 case 'B': /* Volatile qual on some type (Sun) */
2625 type = read_type (pp, objfile);
2626 type = make_cv_type (TYPE_CONST (type), 1, type,
2627 dbx_lookup_type (typenums));
2631 if (isdigit (**pp) || **pp == '(' || **pp == '-')
2632 { /* Member (class & variable) type */
2633 /* FIXME -- we should be doing smash_to_XXX types here. */
2635 struct type *domain = read_type (pp, objfile);
2636 struct type *memtype;
2639 /* Invalid member type data format. */
2640 return error_type (pp, objfile);
2643 memtype = read_type (pp, objfile);
2644 type = dbx_alloc_type (typenums, objfile);
2645 smash_to_member_type (type, domain, memtype);
2648 /* type attribute */
2651 /* Skip to the semicolon. */
2652 while (**pp != ';' && **pp != '\0')
2655 return error_type (pp, objfile);
2657 ++ * pp; /* Skip the semicolon. */
2661 case 's': /* Size attribute */
2662 type_size = atoi (attr + 1);
2667 case 'S': /* String attribute */
2668 /* FIXME: check to see if following type is array? */
2672 case 'V': /* Vector attribute */
2673 /* FIXME: check to see if following type is array? */
2678 /* Ignore unrecognized type attributes, so future compilers
2679 can invent new ones. */
2687 case '#': /* Method (class & fn) type */
2688 if ((*pp)[0] == '#')
2690 /* We'll get the parameter types from the name. */
2691 struct type *return_type;
2694 return_type = read_type (pp, objfile);
2695 if (*(*pp)++ != ';')
2696 complaint (&symfile_complaints,
2697 "invalid (minimal) member type data format at symtab pos %d.",
2699 type = allocate_stub_method (return_type);
2700 if (typenums[0] != -1)
2701 *dbx_lookup_type (typenums) = type;
2705 struct type *domain = read_type (pp, objfile);
2706 struct type *return_type;
2711 /* Invalid member type data format. */
2712 return error_type (pp, objfile);
2716 return_type = read_type (pp, objfile);
2717 args = read_args (pp, ';', objfile, &nargs, &varargs);
2718 type = dbx_alloc_type (typenums, objfile);
2719 smash_to_method_type (type, domain, return_type, args,
2724 case 'r': /* Range type */
2725 type = read_range_type (pp, typenums, objfile);
2726 if (typenums[0] != -1)
2727 *dbx_lookup_type (typenums) = type;
2732 /* Sun ACC builtin int type */
2733 type = read_sun_builtin_type (pp, typenums, objfile);
2734 if (typenums[0] != -1)
2735 *dbx_lookup_type (typenums) = type;
2739 case 'R': /* Sun ACC builtin float type */
2740 type = read_sun_floating_type (pp, typenums, objfile);
2741 if (typenums[0] != -1)
2742 *dbx_lookup_type (typenums) = type;
2745 case 'e': /* Enumeration type */
2746 type = dbx_alloc_type (typenums, objfile);
2747 type = read_enum_type (pp, type, objfile);
2748 if (typenums[0] != -1)
2749 *dbx_lookup_type (typenums) = type;
2752 case 's': /* Struct type */
2753 case 'u': /* Union type */
2755 enum type_code type_code = TYPE_CODE_UNDEF;
2756 type = dbx_alloc_type (typenums, objfile);
2757 switch (type_descriptor)
2760 type_code = TYPE_CODE_STRUCT;
2763 type_code = TYPE_CODE_UNION;
2766 type = read_struct_type (pp, type, type_code, objfile);
2770 case 'a': /* Array type */
2772 return error_type (pp, objfile);
2775 type = dbx_alloc_type (typenums, objfile);
2776 type = read_array_type (pp, type, objfile);
2778 TYPE_CODE (type) = TYPE_CODE_STRING;
2780 TYPE_FLAGS (type) |= TYPE_FLAG_VECTOR;
2783 case 'S': /* Set or bitstring type */
2784 type1 = read_type (pp, objfile);
2785 type = create_set_type ((struct type *) NULL, type1);
2787 TYPE_CODE (type) = TYPE_CODE_BITSTRING;
2788 if (typenums[0] != -1)
2789 *dbx_lookup_type (typenums) = type;
2793 --*pp; /* Go back to the symbol in error */
2794 /* Particularly important if it was \0! */
2795 return error_type (pp, objfile);
2800 warning ("GDB internal error, type is NULL in stabsread.c\n");
2801 return error_type (pp, objfile);
2804 /* Size specified in a type attribute overrides any other size. */
2805 if (type_size != -1)
2806 TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2811 /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
2812 Return the proper type node for a given builtin type number. */
2814 static struct type *
2815 rs6000_builtin_type (int typenum)
2817 /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
2818 #define NUMBER_RECOGNIZED 34
2819 /* This includes an empty slot for type number -0. */
2820 static struct type *negative_types[NUMBER_RECOGNIZED + 1];
2821 struct type *rettype = NULL;
2823 if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
2825 complaint (&symfile_complaints, "Unknown builtin type %d", typenum);
2826 return builtin_type_error;
2828 if (negative_types[-typenum] != NULL)
2829 return negative_types[-typenum];
2831 #if TARGET_CHAR_BIT != 8
2832 #error This code wrong for TARGET_CHAR_BIT not 8
2833 /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
2834 that if that ever becomes not true, the correct fix will be to
2835 make the size in the struct type to be in bits, not in units of
2842 /* The size of this and all the other types are fixed, defined
2843 by the debugging format. If there is a type called "int" which
2844 is other than 32 bits, then it should use a new negative type
2845 number (or avoid negative type numbers for that case).
2846 See stabs.texinfo. */
2847 rettype = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
2850 rettype = init_type (TYPE_CODE_INT, 1, 0, "char", NULL);
2853 rettype = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
2856 rettype = init_type (TYPE_CODE_INT, 4, 0, "long", NULL);
2859 rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
2860 "unsigned char", NULL);
2863 rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", NULL);
2866 rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
2867 "unsigned short", NULL);
2870 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2871 "unsigned int", NULL);
2874 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2877 rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
2878 "unsigned long", NULL);
2881 rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
2884 /* IEEE single precision (32 bit). */
2885 rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
2888 /* IEEE double precision (64 bit). */
2889 rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
2892 /* This is an IEEE double on the RS/6000, and different machines with
2893 different sizes for "long double" should use different negative
2894 type numbers. See stabs.texinfo. */
2895 rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", NULL);
2898 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", NULL);
2901 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2905 rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", NULL);
2908 rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", NULL);
2911 rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", NULL);
2914 rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
2918 rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
2922 rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
2926 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2930 rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
2934 /* Complex type consisting of two IEEE single precision values. */
2935 rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", NULL);
2936 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
2940 /* Complex type consisting of two IEEE double precision values. */
2941 rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
2942 TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
2946 rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", NULL);
2949 rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", NULL);
2952 rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", NULL);
2955 rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", NULL);
2958 rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", NULL);
2961 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2962 "unsigned long long", NULL);
2965 rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
2969 rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", NULL);
2972 negative_types[-typenum] = rettype;
2976 /* This page contains subroutines of read_type. */
2978 /* Replace *OLD_NAME with the method name portion of PHYSNAME. */
2981 update_method_name_from_physname (char **old_name, char *physname)
2985 method_name = method_name_from_physname (physname);
2987 if (method_name == NULL)
2988 error ("bad physname %s\n", physname);
2990 if (strcmp (*old_name, method_name) != 0)
2993 *old_name = method_name;
2996 xfree (method_name);
2999 /* Read member function stabs info for C++ classes. The form of each member
3002 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
3004 An example with two member functions is:
3006 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
3008 For the case of overloaded operators, the format is op$::*.funcs, where
3009 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
3010 name (such as `+=') and `.' marks the end of the operator name.
3012 Returns 1 for success, 0 for failure. */
3015 read_member_functions (struct field_info *fip, char **pp, struct type *type,
3016 struct objfile *objfile)
3020 /* Total number of member functions defined in this class. If the class
3021 defines two `f' functions, and one `g' function, then this will have
3023 int total_length = 0;
3027 struct next_fnfield *next;
3028 struct fn_field fn_field;
3031 struct type *look_ahead_type;
3032 struct next_fnfieldlist *new_fnlist;
3033 struct next_fnfield *new_sublist;
3037 /* Process each list until we find something that is not a member function
3038 or find the end of the functions. */
3042 /* We should be positioned at the start of the function name.
3043 Scan forward to find the first ':' and if it is not the
3044 first of a "::" delimiter, then this is not a member function. */
3056 look_ahead_type = NULL;
3059 new_fnlist = (struct next_fnfieldlist *)
3060 xmalloc (sizeof (struct next_fnfieldlist));
3061 make_cleanup (xfree, new_fnlist);
3062 memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
3064 if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
3066 /* This is a completely wierd case. In order to stuff in the
3067 names that might contain colons (the usual name delimiter),
3068 Mike Tiemann defined a different name format which is
3069 signalled if the identifier is "op$". In that case, the
3070 format is "op$::XXXX." where XXXX is the name. This is
3071 used for names like "+" or "=". YUUUUUUUK! FIXME! */
3072 /* This lets the user type "break operator+".
3073 We could just put in "+" as the name, but that wouldn't
3075 static char opname[32] = "op$";
3076 char *o = opname + 3;
3078 /* Skip past '::'. */
3081 STABS_CONTINUE (pp, objfile);
3087 main_fn_name = savestring (opname, o - opname);
3093 main_fn_name = savestring (*pp, p - *pp);
3094 /* Skip past '::'. */
3097 new_fnlist->fn_fieldlist.name = main_fn_name;
3102 (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
3103 make_cleanup (xfree, new_sublist);
3104 memset (new_sublist, 0, sizeof (struct next_fnfield));
3106 /* Check for and handle cretinous dbx symbol name continuation! */
3107 if (look_ahead_type == NULL)
3110 STABS_CONTINUE (pp, objfile);
3112 new_sublist->fn_field.type = read_type (pp, objfile);
3115 /* Invalid symtab info for member function. */
3121 /* g++ version 1 kludge */
3122 new_sublist->fn_field.type = look_ahead_type;
3123 look_ahead_type = NULL;
3133 /* If this is just a stub, then we don't have the real name here. */
3135 if (TYPE_STUB (new_sublist->fn_field.type))
3137 if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
3138 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
3139 new_sublist->fn_field.is_stub = 1;
3141 new_sublist->fn_field.physname = savestring (*pp, p - *pp);
3144 /* Set this member function's visibility fields. */
3147 case VISIBILITY_PRIVATE:
3148 new_sublist->fn_field.is_private = 1;
3150 case VISIBILITY_PROTECTED:
3151 new_sublist->fn_field.is_protected = 1;
3155 STABS_CONTINUE (pp, objfile);
3158 case 'A': /* Normal functions. */
3159 new_sublist->fn_field.is_const = 0;
3160 new_sublist->fn_field.is_volatile = 0;
3163 case 'B': /* `const' member functions. */
3164 new_sublist->fn_field.is_const = 1;
3165 new_sublist->fn_field.is_volatile = 0;
3168 case 'C': /* `volatile' member function. */
3169 new_sublist->fn_field.is_const = 0;
3170 new_sublist->fn_field.is_volatile = 1;
3173 case 'D': /* `const volatile' member function. */
3174 new_sublist->fn_field.is_const = 1;
3175 new_sublist->fn_field.is_volatile = 1;
3178 case '*': /* File compiled with g++ version 1 -- no info */
3183 complaint (&symfile_complaints,
3184 "const/volatile indicator missing, got '%c'", **pp);
3193 /* virtual member function, followed by index.
3194 The sign bit is set to distinguish pointers-to-methods
3195 from virtual function indicies. Since the array is
3196 in words, the quantity must be shifted left by 1
3197 on 16 bit machine, and by 2 on 32 bit machine, forcing
3198 the sign bit out, and usable as a valid index into
3199 the array. Remove the sign bit here. */
3200 new_sublist->fn_field.voffset =
3201 (0x7fffffff & read_huge_number (pp, ';', &nbits)) + 2;
3205 STABS_CONTINUE (pp, objfile);
3206 if (**pp == ';' || **pp == '\0')
3208 /* Must be g++ version 1. */
3209 new_sublist->fn_field.fcontext = 0;
3213 /* Figure out from whence this virtual function came.
3214 It may belong to virtual function table of
3215 one of its baseclasses. */
3216 look_ahead_type = read_type (pp, objfile);
3219 /* g++ version 1 overloaded methods. */
3223 new_sublist->fn_field.fcontext = look_ahead_type;
3232 look_ahead_type = NULL;
3238 /* static member function. */
3240 int slen = strlen (main_fn_name);
3242 new_sublist->fn_field.voffset = VOFFSET_STATIC;
3244 /* For static member functions, we can't tell if they
3245 are stubbed, as they are put out as functions, and not as
3247 GCC v2 emits the fully mangled name if
3248 dbxout.c:flag_minimal_debug is not set, so we have to
3249 detect a fully mangled physname here and set is_stub
3250 accordingly. Fully mangled physnames in v2 start with
3251 the member function name, followed by two underscores.
3252 GCC v3 currently always emits stubbed member functions,
3253 but with fully mangled physnames, which start with _Z. */
3254 if (!(strncmp (new_sublist->fn_field.physname,
3255 main_fn_name, slen) == 0
3256 && new_sublist->fn_field.physname[slen] == '_'
3257 && new_sublist->fn_field.physname[slen + 1] == '_'))
3259 new_sublist->fn_field.is_stub = 1;
3266 complaint (&symfile_complaints,
3267 "member function type missing, got '%c'", (*pp)[-1]);
3268 /* Fall through into normal member function. */
3271 /* normal member function. */
3272 new_sublist->fn_field.voffset = 0;
3273 new_sublist->fn_field.fcontext = 0;
3277 new_sublist->next = sublist;
3278 sublist = new_sublist;
3280 STABS_CONTINUE (pp, objfile);
3282 while (**pp != ';' && **pp != '\0');
3285 STABS_CONTINUE (pp, objfile);
3287 /* Skip GCC 3.X member functions which are duplicates of the callable
3288 constructor/destructor. */
3289 if (strcmp (main_fn_name, "__base_ctor") == 0
3290 || strcmp (main_fn_name, "__base_dtor") == 0
3291 || strcmp (main_fn_name, "__deleting_dtor") == 0)
3293 xfree (main_fn_name);
3298 int has_destructor = 0, has_other = 0;
3300 struct next_fnfield *tmp_sublist;
3302 /* Various versions of GCC emit various mostly-useless
3303 strings in the name field for special member functions.
3305 For stub methods, we need to defer correcting the name
3306 until we are ready to unstub the method, because the current
3307 name string is used by gdb_mangle_name. The only stub methods
3308 of concern here are GNU v2 operators; other methods have their
3309 names correct (see caveat below).
3311 For non-stub methods, in GNU v3, we have a complete physname.
3312 Therefore we can safely correct the name now. This primarily
3313 affects constructors and destructors, whose name will be
3314 __comp_ctor or __comp_dtor instead of Foo or ~Foo. Cast
3315 operators will also have incorrect names; for instance,
3316 "operator int" will be named "operator i" (i.e. the type is
3319 For non-stub methods in GNU v2, we have no easy way to
3320 know if we have a complete physname or not. For most
3321 methods the result depends on the platform (if CPLUS_MARKER
3322 can be `$' or `.', it will use minimal debug information, or
3323 otherwise the full physname will be included).
3325 Rather than dealing with this, we take a different approach.
3326 For v3 mangled names, we can use the full physname; for v2,
3327 we use cplus_demangle_opname (which is actually v2 specific),
3328 because the only interesting names are all operators - once again
3329 barring the caveat below. Skip this process if any method in the
3330 group is a stub, to prevent our fouling up the workings of
3333 The caveat: GCC 2.95.x (and earlier?) put constructors and
3334 destructors in the same method group. We need to split this
3335 into two groups, because they should have different names.
3336 So for each method group we check whether it contains both
3337 routines whose physname appears to be a destructor (the physnames
3338 for and destructors are always provided, due to quirks in v2
3339 mangling) and routines whose physname does not appear to be a
3340 destructor. If so then we break up the list into two halves.
3341 Even if the constructors and destructors aren't in the same group
3342 the destructor will still lack the leading tilde, so that also
3345 So, to summarize what we expect and handle here:
3347 Given Given Real Real Action
3348 method name physname physname method name
3350 __opi [none] __opi__3Foo operator int opname
3352 Foo _._3Foo _._3Foo ~Foo separate and
3354 operator i _ZN3FoocviEv _ZN3FoocviEv operator int demangle
3355 __comp_ctor _ZN3FooC1ERKS_ _ZN3FooC1ERKS_ Foo demangle
3358 tmp_sublist = sublist;
3359 while (tmp_sublist != NULL)
3361 if (tmp_sublist->fn_field.is_stub)
3363 if (tmp_sublist->fn_field.physname[0] == '_'
3364 && tmp_sublist->fn_field.physname[1] == 'Z')
3367 if (is_destructor_name (tmp_sublist->fn_field.physname))
3372 tmp_sublist = tmp_sublist->next;
3375 if (has_destructor && has_other)
3377 struct next_fnfieldlist *destr_fnlist;
3378 struct next_fnfield *last_sublist;
3380 /* Create a new fn_fieldlist for the destructors. */
3382 destr_fnlist = (struct next_fnfieldlist *)
3383 xmalloc (sizeof (struct next_fnfieldlist));
3384 make_cleanup (xfree, destr_fnlist);
3385 memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
3386 destr_fnlist->fn_fieldlist.name
3387 = obconcat (&objfile->type_obstack, "", "~",
3388 new_fnlist->fn_fieldlist.name);
3390 destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
3391 obstack_alloc (&objfile->type_obstack,
3392 sizeof (struct fn_field) * has_destructor);
3393 memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
3394 sizeof (struct fn_field) * has_destructor);
3395 tmp_sublist = sublist;
3396 last_sublist = NULL;
3398 while (tmp_sublist != NULL)
3400 if (!is_destructor_name (tmp_sublist->fn_field.physname))
3402 tmp_sublist = tmp_sublist->next;
3406 destr_fnlist->fn_fieldlist.fn_fields[i++]
3407 = tmp_sublist->fn_field;
3409 last_sublist->next = tmp_sublist->next;
3411 sublist = tmp_sublist->next;
3412 last_sublist = tmp_sublist;
3413 tmp_sublist = tmp_sublist->next;
3416 destr_fnlist->fn_fieldlist.length = has_destructor;
3417 destr_fnlist->next = fip->fnlist;
3418 fip->fnlist = destr_fnlist;
3420 total_length += has_destructor;
3421 length -= has_destructor;
3425 /* v3 mangling prevents the use of abbreviated physnames,
3426 so we can do this here. There are stubbed methods in v3
3428 - in -gstabs instead of -gstabs+
3429 - or for static methods, which are output as a function type
3430 instead of a method type. */
3432 update_method_name_from_physname (&new_fnlist->fn_fieldlist.name,
3433 sublist->fn_field.physname);
3435 else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
3437 new_fnlist->fn_fieldlist.name = concat ("~", main_fn_name, NULL);
3438 xfree (main_fn_name);
3442 char dem_opname[256];
3444 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
3445 dem_opname, DMGL_ANSI);
3447 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
3450 new_fnlist->fn_fieldlist.name
3451 = obsavestring (dem_opname, strlen (dem_opname),
3452 &objfile->type_obstack);
3455 new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
3456 obstack_alloc (&objfile->type_obstack,
3457 sizeof (struct fn_field) * length);
3458 memset (new_fnlist->fn_fieldlist.fn_fields, 0,
3459 sizeof (struct fn_field) * length);
3460 for (i = length; (i--, sublist); sublist = sublist->next)
3462 new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
3465 new_fnlist->fn_fieldlist.length = length;
3466 new_fnlist->next = fip->fnlist;
3467 fip->fnlist = new_fnlist;
3469 total_length += length;
3475 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3476 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
3477 TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
3478 memset (TYPE_FN_FIELDLISTS (type), 0,
3479 sizeof (struct fn_fieldlist) * nfn_fields);
3480 TYPE_NFN_FIELDS (type) = nfn_fields;
3481 TYPE_NFN_FIELDS_TOTAL (type) = total_length;
3487 /* Special GNU C++ name.
3489 Returns 1 for success, 0 for failure. "failure" means that we can't
3490 keep parsing and it's time for error_type(). */
3493 read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
3494 struct objfile *objfile)
3499 struct type *context;
3509 /* At this point, *pp points to something like "22:23=*22...",
3510 where the type number before the ':' is the "context" and
3511 everything after is a regular type definition. Lookup the
3512 type, find it's name, and construct the field name. */
3514 context = read_type (pp, objfile);
3518 case 'f': /* $vf -- a virtual function table pointer */
3519 name = type_name_no_tag (context);
3524 fip->list->field.name =
3525 obconcat (&objfile->type_obstack, vptr_name, name, "");
3528 case 'b': /* $vb -- a virtual bsomethingorother */
3529 name = type_name_no_tag (context);
3532 complaint (&symfile_complaints,
3533 "C++ abbreviated type name unknown at symtab pos %d",
3537 fip->list->field.name =
3538 obconcat (&objfile->type_obstack, vb_name, name, "");
3542 invalid_cpp_abbrev_complaint (*pp);
3543 fip->list->field.name =
3544 obconcat (&objfile->type_obstack,
3545 "INVALID_CPLUSPLUS_ABBREV", "", "");
3549 /* At this point, *pp points to the ':'. Skip it and read the
3555 invalid_cpp_abbrev_complaint (*pp);
3558 fip->list->field.type = read_type (pp, objfile);
3560 (*pp)++; /* Skip the comma. */
3566 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ';', &nbits);
3570 /* This field is unpacked. */
3571 FIELD_BITSIZE (fip->list->field) = 0;
3572 fip->list->visibility = VISIBILITY_PRIVATE;
3576 invalid_cpp_abbrev_complaint (*pp);
3577 /* We have no idea what syntax an unrecognized abbrev would have, so
3578 better return 0. If we returned 1, we would need to at least advance
3579 *pp to avoid an infinite loop. */
3586 read_one_struct_field (struct field_info *fip, char **pp, char *p,
3587 struct type *type, struct objfile *objfile)
3589 /* The following is code to work around cfront generated stabs.
3590 The stabs contains full mangled name for each field.
3591 We try to demangle the name and extract the field name out of it.
3593 if (ARM_DEMANGLING && current_subfile->language == language_cplus)
3599 dem = cplus_demangle (*pp, DMGL_ANSI | DMGL_PARAMS);
3602 dem_p = strrchr (dem, ':');
3603 if (dem_p != 0 && *(dem_p - 1) == ':')
3605 FIELD_NAME (fip->list->field) =
3606 obsavestring (dem_p, strlen (dem_p), &objfile->type_obstack);
3610 FIELD_NAME (fip->list->field) =
3611 obsavestring (*pp, p - *pp, &objfile->type_obstack);
3615 /* end of code for cfront work around */
3618 fip->list->field.name =
3619 obsavestring (*pp, p - *pp, &objfile->type_obstack);
3622 /* This means we have a visibility for a field coming. */
3626 fip->list->visibility = *(*pp)++;
3630 /* normal dbx-style format, no explicit visibility */
3631 fip->list->visibility = VISIBILITY_PUBLIC;
3634 fip->list->field.type = read_type (pp, objfile);
3639 /* Possible future hook for nested types. */
3642 fip->list->field.bitpos = (long) -2; /* nested type */
3652 /* Static class member. */
3653 SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
3657 else if (**pp != ',')
3659 /* Bad structure-type format. */
3660 stabs_general_complaint ("bad structure-type format");
3664 (*pp)++; /* Skip the comma. */
3668 FIELD_BITPOS (fip->list->field) = read_huge_number (pp, ',', &nbits);
3671 stabs_general_complaint ("bad structure-type format");
3674 FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits);
3677 stabs_general_complaint ("bad structure-type format");
3682 if (FIELD_BITPOS (fip->list->field) == 0
3683 && FIELD_BITSIZE (fip->list->field) == 0)
3685 /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
3686 it is a field which has been optimized out. The correct stab for
3687 this case is to use VISIBILITY_IGNORE, but that is a recent
3688 invention. (2) It is a 0-size array. For example
3689 union { int num; char str[0]; } foo. Printing "<no value>" for
3690 str in "p foo" is OK, since foo.str (and thus foo.str[3])
3691 will continue to work, and a 0-size array as a whole doesn't
3692 have any contents to print.
3694 I suspect this probably could also happen with gcc -gstabs (not
3695 -gstabs+) for static fields, and perhaps other C++ extensions.
3696 Hopefully few people use -gstabs with gdb, since it is intended
3697 for dbx compatibility. */
3699 /* Ignore this field. */
3700 fip->list->visibility = VISIBILITY_IGNORE;
3704 /* Detect an unpacked field and mark it as such.
3705 dbx gives a bit size for all fields.
3706 Note that forward refs cannot be packed,
3707 and treat enums as if they had the width of ints. */
3709 struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));
3711 if (TYPE_CODE (field_type) != TYPE_CODE_INT
3712 && TYPE_CODE (field_type) != TYPE_CODE_RANGE
3713 && TYPE_CODE (field_type) != TYPE_CODE_BOOL
3714 && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
3716 FIELD_BITSIZE (fip->list->field) = 0;
3718 if ((FIELD_BITSIZE (fip->list->field)
3719 == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
3720 || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
3721 && FIELD_BITSIZE (fip->list->field) == TARGET_INT_BIT)
3724 FIELD_BITPOS (fip->list->field) % 8 == 0)
3726 FIELD_BITSIZE (fip->list->field) = 0;
3732 /* Read struct or class data fields. They have the form:
3734 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
3736 At the end, we see a semicolon instead of a field.
3738 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
3741 The optional VISIBILITY is one of:
3743 '/0' (VISIBILITY_PRIVATE)
3744 '/1' (VISIBILITY_PROTECTED)
3745 '/2' (VISIBILITY_PUBLIC)
3746 '/9' (VISIBILITY_IGNORE)
3748 or nothing, for C style fields with public visibility.
3750 Returns 1 for success, 0 for failure. */
3753 read_struct_fields (struct field_info *fip, char **pp, struct type *type,
3754 struct objfile *objfile)
3757 struct nextfield *new;
3759 /* We better set p right now, in case there are no fields at all... */
3763 /* Read each data member type until we find the terminating ';' at the end of
3764 the data member list, or break for some other reason such as finding the
3765 start of the member function list. */
3766 /* Stab string for structure/union does not end with two ';' in
3767 SUN C compiler 5.3 i.e. F6U2, hence check for end of string. */
3769 while (**pp != ';' && **pp != '\0')
3771 STABS_CONTINUE (pp, objfile);
3772 /* Get space to record the next field's data. */
3773 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3774 make_cleanup (xfree, new);
3775 memset (new, 0, sizeof (struct nextfield));
3776 new->next = fip->list;
3779 /* Get the field name. */
3782 /* If is starts with CPLUS_MARKER it is a special abbreviation,
3783 unless the CPLUS_MARKER is followed by an underscore, in
3784 which case it is just the name of an anonymous type, which we
3785 should handle like any other type name. */
3787 if (is_cplus_marker (p[0]) && p[1] != '_')
3789 if (!read_cpp_abbrev (fip, pp, type, objfile))
3794 /* Look for the ':' that separates the field name from the field
3795 values. Data members are delimited by a single ':', while member
3796 functions are delimited by a pair of ':'s. When we hit the member
3797 functions (if any), terminate scan loop and return. */
3799 while (*p != ':' && *p != '\0')
3806 /* Check to see if we have hit the member functions yet. */
3811 read_one_struct_field (fip, pp, p, type, objfile);
3813 if (p[0] == ':' && p[1] == ':')
3815 /* (the deleted) chill the list of fields: the last entry (at
3816 the head) is a partially constructed entry which we now
3818 fip->list = fip->list->next;
3823 /* The stabs for C++ derived classes contain baseclass information which
3824 is marked by a '!' character after the total size. This function is
3825 called when we encounter the baseclass marker, and slurps up all the
3826 baseclass information.
3828 Immediately following the '!' marker is the number of base classes that
3829 the class is derived from, followed by information for each base class.
3830 For each base class, there are two visibility specifiers, a bit offset
3831 to the base class information within the derived class, a reference to
3832 the type for the base class, and a terminating semicolon.
3834 A typical example, with two base classes, would be "!2,020,19;0264,21;".
3836 Baseclass information marker __________________|| | | | | | |
3837 Number of baseclasses __________________________| | | | | | |
3838 Visibility specifiers (2) ________________________| | | | | |
3839 Offset in bits from start of class _________________| | | | |
3840 Type number for base class ___________________________| | | |
3841 Visibility specifiers (2) _______________________________| | |
3842 Offset in bits from start of class ________________________| |
3843 Type number of base class ____________________________________|
3845 Return 1 for success, 0 for (error-type-inducing) failure. */
3851 read_baseclasses (struct field_info *fip, char **pp, struct type *type,
3852 struct objfile *objfile)
3855 struct nextfield *new;
3863 /* Skip the '!' baseclass information marker. */
3867 ALLOCATE_CPLUS_STRUCT_TYPE (type);
3870 TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits);
3876 /* Some stupid compilers have trouble with the following, so break
3877 it up into simpler expressions. */
3878 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
3879 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
3882 int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
3885 pointer = (char *) TYPE_ALLOC (type, num_bytes);
3886 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
3890 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
3892 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
3894 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
3895 make_cleanup (xfree, new);
3896 memset (new, 0, sizeof (struct nextfield));
3897 new->next = fip->list;
3899 FIELD_BITSIZE (new->field) = 0; /* this should be an unpacked field! */
3901 STABS_CONTINUE (pp, objfile);
3905 /* Nothing to do. */
3908 SET_TYPE_FIELD_VIRTUAL (type, i);
3911 /* Unknown character. Complain and treat it as non-virtual. */
3913 complaint (&symfile_complaints,
3914 "Unknown virtual character `%c' for baseclass", **pp);
3919 new->visibility = *(*pp)++;
3920 switch (new->visibility)
3922 case VISIBILITY_PRIVATE:
3923 case VISIBILITY_PROTECTED:
3924 case VISIBILITY_PUBLIC:
3927 /* Bad visibility format. Complain and treat it as
3930 complaint (&symfile_complaints,
3931 "Unknown visibility `%c' for baseclass",
3933 new->visibility = VISIBILITY_PUBLIC;
3940 /* The remaining value is the bit offset of the portion of the object
3941 corresponding to this baseclass. Always zero in the absence of
3942 multiple inheritance. */
3944 FIELD_BITPOS (new->field) = read_huge_number (pp, ',', &nbits);
3949 /* The last piece of baseclass information is the type of the
3950 base class. Read it, and remember it's type name as this
3953 new->field.type = read_type (pp, objfile);
3954 new->field.name = type_name_no_tag (new->field.type);
3956 /* skip trailing ';' and bump count of number of fields seen */
3965 /* The tail end of stabs for C++ classes that contain a virtual function
3966 pointer contains a tilde, a %, and a type number.
3967 The type number refers to the base class (possibly this class itself) which
3968 contains the vtable pointer for the current class.
3970 This function is called when we have parsed all the method declarations,
3971 so we can look for the vptr base class info. */
3974 read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
3975 struct objfile *objfile)
3979 STABS_CONTINUE (pp, objfile);
3981 /* If we are positioned at a ';', then skip it. */
3991 if (**pp == '=' || **pp == '+' || **pp == '-')
3993 /* Obsolete flags that used to indicate the presence
3994 of constructors and/or destructors. */
3998 /* Read either a '%' or the final ';'. */
3999 if (*(*pp)++ == '%')
4001 /* The next number is the type number of the base class
4002 (possibly our own class) which supplies the vtable for
4003 this class. Parse it out, and search that class to find
4004 its vtable pointer, and install those into TYPE_VPTR_BASETYPE
4005 and TYPE_VPTR_FIELDNO. */
4010 t = read_type (pp, objfile);
4012 while (*p != '\0' && *p != ';')
4018 /* Premature end of symbol. */
4022 TYPE_VPTR_BASETYPE (type) = t;
4023 if (type == t) /* Our own class provides vtbl ptr */
4025 for (i = TYPE_NFIELDS (t) - 1;
4026 i >= TYPE_N_BASECLASSES (t);
4029 char *name = TYPE_FIELD_NAME (t, i);
4030 if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
4031 && is_cplus_marker (name[sizeof (vptr_name) - 2]))
4033 TYPE_VPTR_FIELDNO (type) = i;
4037 /* Virtual function table field not found. */
4038 complaint (&symfile_complaints,
4039 "virtual function table pointer not found when defining class `%s'",
4045 TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
4056 attach_fn_fields_to_type (struct field_info *fip, register struct type *type)
4060 for (n = TYPE_NFN_FIELDS (type);
4061 fip->fnlist != NULL;
4062 fip->fnlist = fip->fnlist->next)
4064 --n; /* Circumvent Sun3 compiler bug */
4065 TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
4070 /* read cfront class static data.
4071 pp points to string starting with the list of static data
4072 eg: A:ZcA;1@Bpub v2@Bvirpri;__ct__1AFv func__1AFv *sfunc__1AFv ;as__1A ;;
4075 A:ZcA;;foopri__1AFv foopro__1AFv __ct__1AFv __ct__1AFRC1A foopub__1AFv ;;;
4080 read_cfront_static_fields (struct field_info *fip, char **pp, struct type *type,
4081 struct objfile *objfile)
4083 struct nextfield *new;
4086 struct symbol *ref_static = 0;
4088 if (**pp == ';') /* no static data; return */
4094 /* Process each field in the list until we find the terminating ";" */
4096 /* eg: p = "as__1A ;;;" */
4097 STABS_CONTINUE (pp, objfile); /* handle \\ */
4098 while (**pp != ';' && (sname = get_substring (pp, ' '), sname))
4100 ref_static = lookup_symbol (sname, 0, VAR_NAMESPACE, 0, 0); /*demangled_name */
4103 complaint (&symfile_complaints,
4104 "Unable to find symbol for static data field %s", sname);
4107 stype = SYMBOL_TYPE (ref_static);
4109 /* allocate a new fip */
4110 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4111 make_cleanup (xfree, new);
4112 memset (new, 0, sizeof (struct nextfield));
4113 new->next = fip->list;
4116 /* set visibility */
4117 /* FIXME! no way to tell visibility from stabs??? */
4118 new->visibility = VISIBILITY_PUBLIC;
4120 /* set field info into fip */
4121 fip->list->field.type = stype;
4123 /* set bitpos & bitsize */
4124 SET_FIELD_PHYSNAME (fip->list->field, savestring (sname, strlen (sname)));
4126 /* set name field */
4127 /* The following is code to work around cfront generated stabs.
4128 The stabs contains full mangled name for each field.
4129 We try to demangle the name and extract the field name out of it.
4134 dem = cplus_demangle (sname, DMGL_ANSI | DMGL_PARAMS);
4137 dem_p = strrchr (dem, ':');
4138 if (dem_p != 0 && *(dem_p - 1) == ':')
4140 fip->list->field.name =
4141 obsavestring (dem_p, strlen (dem_p), &objfile->type_obstack);
4145 fip->list->field.name =
4146 obsavestring (sname, strlen (sname), &objfile->type_obstack);
4148 } /* end of code for cfront work around */
4149 } /* loop again for next static field */
4153 /* Copy structure fields to fip so attach_fields_to_type will work.
4154 type has already been created with the initial instance data fields.
4155 Now we want to be able to add the other members to the class,
4156 so we want to add them back to the fip and reattach them again
4157 once we have collected all the class members. */
4160 copy_cfront_struct_fields (struct field_info *fip, struct type *type,
4161 struct objfile *objfile)
4163 int nfields = TYPE_NFIELDS (type);
4165 struct nextfield *new;
4167 /* Copy the fields into the list of fips and reset the types
4168 to remove the old fields */
4170 for (i = 0; i < nfields; i++)
4172 /* allocate a new fip */
4173 new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
4174 make_cleanup (xfree, new);
4175 memset (new, 0, sizeof (struct nextfield));
4176 new->next = fip->list;
4179 /* copy field info into fip */
4180 new->field = TYPE_FIELD (type, i);
4181 /* set visibility */
4182 if (TYPE_FIELD_PROTECTED (type, i))
4183 new->visibility = VISIBILITY_PROTECTED;
4184 else if (TYPE_FIELD_PRIVATE (type, i))
4185 new->visibility = VISIBILITY_PRIVATE;
4187 new->visibility = VISIBILITY_PUBLIC;
4189 /* Now delete the fields from the type since we will be
4190 allocing new space once we get the rest of the fields
4191 in attach_fields_to_type.
4192 The pointer TYPE_FIELDS(type) is left dangling but should
4193 be freed later by objstack_free */
4194 TYPE_FIELDS (type) = 0;
4195 TYPE_NFIELDS (type) = 0;
4200 /* Create the vector of fields, and record how big it is.
4201 We need this info to record proper virtual function table information
4202 for this class's virtual functions. */
4205 attach_fields_to_type (struct field_info *fip, register struct type *type,
4206 struct objfile *objfile)
4208 register int nfields = 0;
4209 register int non_public_fields = 0;
4210 register struct nextfield *scan;
4212 /* Count up the number of fields that we have, as well as taking note of
4213 whether or not there are any non-public fields, which requires us to
4214 allocate and build the private_field_bits and protected_field_bits
4217 for (scan = fip->list; scan != NULL; scan = scan->next)
4220 if (scan->visibility != VISIBILITY_PUBLIC)
4222 non_public_fields++;
4226 /* Now we know how many fields there are, and whether or not there are any
4227 non-public fields. Record the field count, allocate space for the
4228 array of fields, and create blank visibility bitfields if necessary. */
4230 TYPE_NFIELDS (type) = nfields;
4231 TYPE_FIELDS (type) = (struct field *)
4232 TYPE_ALLOC (type, sizeof (struct field) * nfields);
4233 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
4235 if (non_public_fields)
4237 ALLOCATE_CPLUS_STRUCT_TYPE (type);
4239 TYPE_FIELD_PRIVATE_BITS (type) =
4240 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4241 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
4243 TYPE_FIELD_PROTECTED_BITS (type) =
4244 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4245 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
4247 TYPE_FIELD_IGNORE_BITS (type) =
4248 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
4249 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
4252 /* Copy the saved-up fields into the field vector. Start from the head
4253 of the list, adding to the tail of the field array, so that they end
4254 up in the same order in the array in which they were added to the list. */
4256 while (nfields-- > 0)
4258 TYPE_FIELD (type, nfields) = fip->list->field;
4259 switch (fip->list->visibility)
4261 case VISIBILITY_PRIVATE:
4262 SET_TYPE_FIELD_PRIVATE (type, nfields);
4265 case VISIBILITY_PROTECTED:
4266 SET_TYPE_FIELD_PROTECTED (type, nfields);
4269 case VISIBILITY_IGNORE:
4270 SET_TYPE_FIELD_IGNORE (type, nfields);
4273 case VISIBILITY_PUBLIC:
4277 /* Unknown visibility. Complain and treat it as public. */
4279 complaint (&symfile_complaints, "Unknown visibility `%c' for field",
4280 fip->list->visibility);
4284 fip->list = fip->list->next;
4290 /* Complain that the compiler has emitted more than one definition for the
4291 structure type TYPE. */
4293 complain_about_struct_wipeout (struct type *type)
4298 if (TYPE_TAG_NAME (type))
4300 name = TYPE_TAG_NAME (type);
4301 switch (TYPE_CODE (type))
4303 case TYPE_CODE_STRUCT: kind = "struct "; break;
4304 case TYPE_CODE_UNION: kind = "union "; break;
4305 case TYPE_CODE_ENUM: kind = "enum "; break;
4309 else if (TYPE_NAME (type))
4311 name = TYPE_NAME (type);
4320 complaint (&symfile_complaints,
4321 "struct/union type gets multiply defined: %s%s", kind, name);
4325 /* Read the description of a structure (or union type) and return an object
4326 describing the type.
4328 PP points to a character pointer that points to the next unconsumed token
4329 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
4330 *PP will point to "4a:1,0,32;;".
4332 TYPE points to an incomplete type that needs to be filled in.
4334 OBJFILE points to the current objfile from which the stabs information is
4335 being read. (Note that it is redundant in that TYPE also contains a pointer
4336 to this same objfile, so it might be a good idea to eliminate it. FIXME).
4339 static struct type *
4340 read_struct_type (char **pp, struct type *type, enum type_code type_code,
4341 struct objfile *objfile)
4343 struct cleanup *back_to;
4344 struct field_info fi;
4349 /* When describing struct/union/class types in stabs, G++ always drops
4350 all qualifications from the name. So if you've got:
4351 struct A { ... struct B { ... }; ... };
4352 then G++ will emit stabs for `struct A::B' that call it simply
4353 `struct B'. Obviously, if you've got a real top-level definition for
4354 `struct B', or other nested definitions, this is going to cause
4357 Obviously, GDB can't fix this by itself, but it can at least avoid
4358 scribbling on existing structure type objects when new definitions
4360 if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
4361 || TYPE_STUB (type)))
4363 complain_about_struct_wipeout (type);
4365 /* It's probably best to return the type unchanged. */
4369 back_to = make_cleanup (null_cleanup, 0);
4371 INIT_CPLUS_SPECIFIC (type);
4372 TYPE_CODE (type) = type_code;
4373 TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
4375 /* First comes the total size in bytes. */
4379 TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits);
4381 return error_type (pp, objfile);
4384 /* Now read the baseclasses, if any, read the regular C struct or C++
4385 class member fields, attach the fields to the type, read the C++
4386 member functions, attach them to the type, and then read any tilde
4387 field (baseclass specifier for the class holding the main vtable). */
4389 if (!read_baseclasses (&fi, pp, type, objfile)
4390 || !read_struct_fields (&fi, pp, type, objfile)
4391 || !attach_fields_to_type (&fi, type, objfile)
4392 || !read_member_functions (&fi, pp, type, objfile)
4393 || !attach_fn_fields_to_type (&fi, type)
4394 || !read_tilde_fields (&fi, pp, type, objfile))
4396 type = error_type (pp, objfile);
4399 do_cleanups (back_to);
4403 /* Read a definition of an array type,
4404 and create and return a suitable type object.
4405 Also creates a range type which represents the bounds of that
4408 static struct type *
4409 read_array_type (register char **pp, register struct type *type,
4410 struct objfile *objfile)
4412 struct type *index_type, *element_type, *range_type;
4417 /* Format of an array type:
4418 "ar<index type>;lower;upper;<array_contents_type>".
4419 OS9000: "arlower,upper;<array_contents_type>".
4421 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
4422 for these, produce a type like float[][]. */
4425 index_type = read_type (pp, objfile);
4427 /* Improper format of array type decl. */
4428 return error_type (pp, objfile);
4432 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
4437 lower = read_huge_number (pp, ';', &nbits);
4440 return error_type (pp, objfile);
4442 if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
4447 upper = read_huge_number (pp, ';', &nbits);
4449 return error_type (pp, objfile);
4451 element_type = read_type (pp, objfile);
4460 create_range_type ((struct type *) NULL, index_type, lower, upper);
4461 type = create_array_type (type, element_type, range_type);
4467 /* Read a definition of an enumeration type,
4468 and create and return a suitable type object.
4469 Also defines the symbols that represent the values of the type. */
4471 static struct type *
4472 read_enum_type (register char **pp, register struct type *type,
4473 struct objfile *objfile)
4478 register struct symbol *sym;
4480 struct pending **symlist;
4481 struct pending *osyms, *syms;
4484 int unsigned_enum = 1;
4487 /* FIXME! The stabs produced by Sun CC merrily define things that ought
4488 to be file-scope, between N_FN entries, using N_LSYM. What's a mother
4489 to do? For now, force all enum values to file scope. */
4490 if (within_function)
4491 symlist = &local_symbols;
4494 symlist = &file_symbols;
4496 o_nsyms = osyms ? osyms->nsyms : 0;
4498 /* The aix4 compiler emits an extra field before the enum members;
4499 my guess is it's a type of some sort. Just ignore it. */
4502 /* Skip over the type. */
4506 /* Skip over the colon. */
4510 /* Read the value-names and their values.
4511 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
4512 A semicolon or comma instead of a NAME means the end. */
4513 while (**pp && **pp != ';' && **pp != ',')
4515 STABS_CONTINUE (pp, objfile);
4519 name = obsavestring (*pp, p - *pp, &objfile->symbol_obstack);
4521 n = read_huge_number (pp, ',', &nbits);
4523 return error_type (pp, objfile);
4525 sym = (struct symbol *)
4526 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
4527 memset (sym, 0, sizeof (struct symbol));
4528 SYMBOL_NAME (sym) = name;
4529 SYMBOL_LANGUAGE (sym) = current_subfile->language;
4530 SYMBOL_CLASS (sym) = LOC_CONST;
4531 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
4532 SYMBOL_VALUE (sym) = n;
4535 add_symbol_to_list (sym, symlist);
4540 (*pp)++; /* Skip the semicolon. */
4542 /* Now fill in the fields of the type-structure. */
4544 TYPE_LENGTH (type) = TARGET_INT_BIT / HOST_CHAR_BIT;
4545 TYPE_CODE (type) = TYPE_CODE_ENUM;
4546 TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
4548 TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
4549 TYPE_NFIELDS (type) = nsyms;
4550 TYPE_FIELDS (type) = (struct field *)
4551 TYPE_ALLOC (type, sizeof (struct field) * nsyms);
4552 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
4554 /* Find the symbols for the values and put them into the type.
4555 The symbols can be found in the symlist that we put them on
4556 to cause them to be defined. osyms contains the old value
4557 of that symlist; everything up to there was defined by us. */
4558 /* Note that we preserve the order of the enum constants, so
4559 that in something like "enum {FOO, LAST_THING=FOO}" we print
4560 FOO, not LAST_THING. */
4562 for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
4564 int last = syms == osyms ? o_nsyms : 0;
4565 int j = syms->nsyms;
4566 for (; --j >= last; --n)
4568 struct symbol *xsym = syms->symbol[j];
4569 SYMBOL_TYPE (xsym) = type;
4570 TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym);
4571 TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
4572 TYPE_FIELD_BITSIZE (type, n) = 0;
4581 /* Sun's ACC uses a somewhat saner method for specifying the builtin
4582 typedefs in every file (for int, long, etc):
4584 type = b <signed> <width> <format type>; <offset>; <nbits>
4586 optional format type = c or b for char or boolean.
4587 offset = offset from high order bit to start bit of type.
4588 width is # bytes in object of this type, nbits is # bits in type.
4590 The width/offset stuff appears to be for small objects stored in
4591 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
4594 static struct type *
4595 read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
4600 enum type_code code = TYPE_CODE_INT;
4611 return error_type (pp, objfile);
4615 /* For some odd reason, all forms of char put a c here. This is strange
4616 because no other type has this honor. We can safely ignore this because
4617 we actually determine 'char'acterness by the number of bits specified in
4619 Boolean forms, e.g Fortran logical*X, put a b here. */
4623 else if (**pp == 'b')
4625 code = TYPE_CODE_BOOL;
4629 /* The first number appears to be the number of bytes occupied
4630 by this type, except that unsigned short is 4 instead of 2.
4631 Since this information is redundant with the third number,
4632 we will ignore it. */
4633 read_huge_number (pp, ';', &nbits);
4635 return error_type (pp, objfile);
4637 /* The second number is always 0, so ignore it too. */
4638 read_huge_number (pp, ';', &nbits);
4640 return error_type (pp, objfile);
4642 /* The third number is the number of bits for this type. */
4643 type_bits = read_huge_number (pp, 0, &nbits);
4645 return error_type (pp, objfile);
4646 /* The type *should* end with a semicolon. If it are embedded
4647 in a larger type the semicolon may be the only way to know where
4648 the type ends. If this type is at the end of the stabstring we
4649 can deal with the omitted semicolon (but we don't have to like
4650 it). Don't bother to complain(), Sun's compiler omits the semicolon
4656 return init_type (TYPE_CODE_VOID, 1,
4657 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
4660 return init_type (code,
4661 type_bits / TARGET_CHAR_BIT,
4662 signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
4666 static struct type *
4667 read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
4672 struct type *rettype;
4674 /* The first number has more details about the type, for example
4676 details = read_huge_number (pp, ';', &nbits);
4678 return error_type (pp, objfile);
4680 /* The second number is the number of bytes occupied by this type */
4681 nbytes = read_huge_number (pp, ';', &nbits);
4683 return error_type (pp, objfile);
4685 if (details == NF_COMPLEX || details == NF_COMPLEX16
4686 || details == NF_COMPLEX32)
4688 rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
4689 TYPE_TARGET_TYPE (rettype)
4690 = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
4694 return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
4697 /* Read a number from the string pointed to by *PP.
4698 The value of *PP is advanced over the number.
4699 If END is nonzero, the character that ends the
4700 number must match END, or an error happens;
4701 and that character is skipped if it does match.
4702 If END is zero, *PP is left pointing to that character.
4704 If the number fits in a long, set *BITS to 0 and return the value.
4705 If not, set *BITS to be the number of bits in the number and return 0.
4707 If encounter garbage, set *BITS to -1 and return 0. */
4710 read_huge_number (char **pp, int end, int *bits)
4727 /* Leading zero means octal. GCC uses this to output values larger
4728 than an int (because that would be hard in decimal). */
4735 upper_limit = LONG_MAX / radix;
4737 while ((c = *p++) >= '0' && c < ('0' + radix))
4739 if (n <= upper_limit)
4742 n += c - '0'; /* FIXME this overflows anyway */
4747 /* This depends on large values being output in octal, which is
4754 /* Ignore leading zeroes. */
4758 else if (c == '2' || c == '3')
4784 /* Large decimal constants are an error (because it is hard to
4785 count how many bits are in them). */
4791 /* -0x7f is the same as 0x80. So deal with it by adding one to
4792 the number of bits. */
4804 /* It's *BITS which has the interesting information. */
4808 static struct type *
4809 read_range_type (char **pp, int typenums[2], struct objfile *objfile)
4811 char *orig_pp = *pp;
4816 struct type *result_type;
4817 struct type *index_type = NULL;
4819 /* First comes a type we are a subrange of.
4820 In C it is usually 0, 1 or the type being defined. */
4821 if (read_type_number (pp, rangenums) != 0)
4822 return error_type (pp, objfile);
4823 self_subrange = (rangenums[0] == typenums[0] &&
4824 rangenums[1] == typenums[1]);
4829 index_type = read_type (pp, objfile);
4832 /* A semicolon should now follow; skip it. */
4836 /* The remaining two operands are usually lower and upper bounds
4837 of the range. But in some special cases they mean something else. */
4838 n2 = read_huge_number (pp, ';', &n2bits);
4839 n3 = read_huge_number (pp, ';', &n3bits);
4841 if (n2bits == -1 || n3bits == -1)
4842 return error_type (pp, objfile);
4845 goto handle_true_range;
4847 /* If limits are huge, must be large integral type. */
4848 if (n2bits != 0 || n3bits != 0)
4850 char got_signed = 0;
4851 char got_unsigned = 0;
4852 /* Number of bits in the type. */
4855 /* Range from 0 to <large number> is an unsigned large integral type. */
4856 if ((n2bits == 0 && n2 == 0) && n3bits != 0)
4861 /* Range from <large number> to <large number>-1 is a large signed
4862 integral type. Take care of the case where <large number> doesn't
4863 fit in a long but <large number>-1 does. */
4864 else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
4865 || (n2bits != 0 && n3bits == 0
4866 && (n2bits == sizeof (long) * HOST_CHAR_BIT)
4873 if (got_signed || got_unsigned)
4875 return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
4876 got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
4880 return error_type (pp, objfile);
4883 /* A type defined as a subrange of itself, with bounds both 0, is void. */
4884 if (self_subrange && n2 == 0 && n3 == 0)
4885 return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
4887 /* If n3 is zero and n2 is positive, we want a floating type, and n2
4888 is the width in bytes.
4890 Fortran programs appear to use this for complex types also. To
4891 distinguish between floats and complex, g77 (and others?) seem
4892 to use self-subranges for the complexes, and subranges of int for
4895 Also note that for complexes, g77 sets n2 to the size of one of
4896 the member floats, not the whole complex beast. My guess is that
4897 this was to work well with pre-COMPLEX versions of gdb. */
4899 if (n3 == 0 && n2 > 0)
4901 struct type *float_type
4902 = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
4906 struct type *complex_type =
4907 init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);
4908 TYPE_TARGET_TYPE (complex_type) = float_type;
4909 return complex_type;
4915 /* If the upper bound is -1, it must really be an unsigned int. */
4917 else if (n2 == 0 && n3 == -1)
4919 /* It is unsigned int or unsigned long. */
4920 /* GCC 2.3.3 uses this for long long too, but that is just a GDB 3.5
4921 compatibility hack. */
4922 return init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
4923 TYPE_FLAG_UNSIGNED, NULL, objfile);
4926 /* Special case: char is defined (Who knows why) as a subrange of
4927 itself with range 0-127. */
4928 else if (self_subrange && n2 == 0 && n3 == 127)
4929 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4931 /* We used to do this only for subrange of self or subrange of int. */
4934 /* -1 is used for the upper bound of (4 byte) "unsigned int" and
4935 "unsigned long", and we already checked for that,
4936 so don't need to test for it here. */
4939 /* n3 actually gives the size. */
4940 return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
4943 /* Is n3 == 2**(8n)-1 for some integer n? Then it's an
4944 unsigned n-byte integer. But do require n to be a power of
4945 two; we don't want 3- and 5-byte integers flying around. */
4951 for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
4954 && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
4955 return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
4959 /* I think this is for Convex "long long". Since I don't know whether
4960 Convex sets self_subrange, I also accept that particular size regardless
4961 of self_subrange. */
4962 else if (n3 == 0 && n2 < 0
4964 || n2 == -TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT))
4965 return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
4966 else if (n2 == -n3 - 1)
4969 return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
4971 return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
4972 if (n3 == 0x7fffffff)
4973 return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
4976 /* We have a real range type on our hands. Allocate space and
4977 return a real pointer. */
4981 index_type = builtin_type_int;
4983 index_type = *dbx_lookup_type (rangenums);
4984 if (index_type == NULL)
4986 /* Does this actually ever happen? Is that why we are worrying
4987 about dealing with it rather than just calling error_type? */
4989 static struct type *range_type_index;
4991 complaint (&symfile_complaints,
4992 "base type %d of range type is not defined", rangenums[1]);
4993 if (range_type_index == NULL)
4995 init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
4996 0, "range type index type", NULL);
4997 index_type = range_type_index;
5000 result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
5001 return (result_type);
5004 /* Read in an argument list. This is a list of types, separated by commas
5005 and terminated with END. Return the list of types read in, or (struct type
5006 **)-1 if there is an error. */
5008 static struct field *
5009 read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
5012 /* FIXME! Remove this arbitrary limit! */
5013 struct type *types[1024]; /* allow for fns of 1023 parameters */
5020 /* Invalid argument list: no ','. */
5021 return (struct field *) -1;
5023 STABS_CONTINUE (pp, objfile);
5024 types[n++] = read_type (pp, objfile);
5026 (*pp)++; /* get past `end' (the ':' character) */
5028 if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
5036 rval = (struct field *) xmalloc (n * sizeof (struct field));
5037 memset (rval, 0, n * sizeof (struct field));
5038 for (i = 0; i < n; i++)
5039 rval[i].type = types[i];
5044 /* Common block handling. */
5046 /* List of symbols declared since the last BCOMM. This list is a tail
5047 of local_symbols. When ECOMM is seen, the symbols on the list
5048 are noted so their proper addresses can be filled in later,
5049 using the common block base address gotten from the assembler
5052 static struct pending *common_block;
5053 static int common_block_i;
5055 /* Name of the current common block. We get it from the BCOMM instead of the
5056 ECOMM to match IBM documentation (even though IBM puts the name both places
5057 like everyone else). */
5058 static char *common_block_name;
5060 /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
5061 to remain after this function returns. */
5064 common_block_start (char *name, struct objfile *objfile)
5066 if (common_block_name != NULL)
5068 complaint (&symfile_complaints,
5069 "Invalid symbol data: common block within common block");
5071 common_block = local_symbols;
5072 common_block_i = local_symbols ? local_symbols->nsyms : 0;
5073 common_block_name = obsavestring (name, strlen (name),
5074 &objfile->symbol_obstack);
5077 /* Process a N_ECOMM symbol. */
5080 common_block_end (struct objfile *objfile)
5082 /* Symbols declared since the BCOMM are to have the common block
5083 start address added in when we know it. common_block and
5084 common_block_i point to the first symbol after the BCOMM in
5085 the local_symbols list; copy the list and hang it off the
5086 symbol for the common block name for later fixup. */
5089 struct pending *new = 0;
5090 struct pending *next;
5093 if (common_block_name == NULL)
5095 complaint (&symfile_complaints, "ECOMM symbol unmatched by BCOMM");
5099 sym = (struct symbol *)
5100 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
5101 memset (sym, 0, sizeof (struct symbol));
5102 /* Note: common_block_name already saved on symbol_obstack */
5103 SYMBOL_NAME (sym) = common_block_name;
5104 SYMBOL_CLASS (sym) = LOC_BLOCK;
5106 /* Now we copy all the symbols which have been defined since the BCOMM. */
5108 /* Copy all the struct pendings before common_block. */
5109 for (next = local_symbols;
5110 next != NULL && next != common_block;
5113 for (j = 0; j < next->nsyms; j++)
5114 add_symbol_to_list (next->symbol[j], &new);
5117 /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
5118 NULL, it means copy all the local symbols (which we already did
5121 if (common_block != NULL)
5122 for (j = common_block_i; j < common_block->nsyms; j++)
5123 add_symbol_to_list (common_block->symbol[j], &new);
5125 SYMBOL_TYPE (sym) = (struct type *) new;
5127 /* Should we be putting local_symbols back to what it was?
5130 i = hashname (SYMBOL_NAME (sym));
5131 SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
5132 global_sym_chain[i] = sym;
5133 common_block_name = NULL;
5136 /* Add a common block's start address to the offset of each symbol
5137 declared to be in it (by being between a BCOMM/ECOMM pair that uses
5138 the common block name). */
5141 fix_common_block (struct symbol *sym, int valu)
5143 struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
5144 for (; next; next = next->next)
5147 for (j = next->nsyms - 1; j >= 0; j--)
5148 SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
5154 /* What about types defined as forward references inside of a small lexical
5156 /* Add a type to the list of undefined types to be checked through
5157 once this file has been read in. */
5160 add_undefined_type (struct type *type)
5162 if (undef_types_length == undef_types_allocated)
5164 undef_types_allocated *= 2;
5165 undef_types = (struct type **)
5166 xrealloc ((char *) undef_types,
5167 undef_types_allocated * sizeof (struct type *));
5169 undef_types[undef_types_length++] = type;
5172 /* Go through each undefined type, see if it's still undefined, and fix it
5173 up if possible. We have two kinds of undefined types:
5175 TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
5176 Fix: update array length using the element bounds
5177 and the target type's length.
5178 TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
5179 yet defined at the time a pointer to it was made.
5180 Fix: Do a full lookup on the struct/union tag. */
5182 cleanup_undefined_types (void)
5186 for (type = undef_types; type < undef_types + undef_types_length; type++)
5188 switch (TYPE_CODE (*type))
5191 case TYPE_CODE_STRUCT:
5192 case TYPE_CODE_UNION:
5193 case TYPE_CODE_ENUM:
5195 /* Check if it has been defined since. Need to do this here
5196 as well as in check_typedef to deal with the (legitimate in
5197 C though not C++) case of several types with the same name
5198 in different source files. */
5199 if (TYPE_STUB (*type))
5201 struct pending *ppt;
5203 /* Name of the type, without "struct" or "union" */
5204 char *typename = TYPE_TAG_NAME (*type);
5206 if (typename == NULL)
5208 complaint (&symfile_complaints, "need a type name");
5211 for (ppt = file_symbols; ppt; ppt = ppt->next)
5213 for (i = 0; i < ppt->nsyms; i++)
5215 struct symbol *sym = ppt->symbol[i];
5217 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
5218 && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
5219 && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
5221 && STREQ (SYMBOL_NAME (sym), typename))
5222 replace_type (*type, SYMBOL_TYPE (sym));
5231 complaint (&symfile_complaints,
5232 "GDB internal error. cleanup_undefined_types with bad type %d.",
5239 undef_types_length = 0;
5242 /* Scan through all of the global symbols defined in the object file,
5243 assigning values to the debugging symbols that need to be assigned
5244 to. Get these symbols from the minimal symbol table. */
5247 scan_file_globals (struct objfile *objfile)
5250 struct minimal_symbol *msymbol;
5251 struct symbol *sym, *prev, *rsym;
5252 struct objfile *resolve_objfile;
5254 /* SVR4 based linkers copy referenced global symbols from shared
5255 libraries to the main executable.
5256 If we are scanning the symbols for a shared library, try to resolve
5257 them from the minimal symbols of the main executable first. */
5259 if (symfile_objfile && objfile != symfile_objfile)
5260 resolve_objfile = symfile_objfile;
5262 resolve_objfile = objfile;
5266 /* Avoid expensive loop through all minimal symbols if there are
5267 no unresolved symbols. */
5268 for (hash = 0; hash < HASHSIZE; hash++)
5270 if (global_sym_chain[hash])
5273 if (hash >= HASHSIZE)
5276 for (msymbol = resolve_objfile->msymbols;
5277 msymbol && SYMBOL_NAME (msymbol) != NULL;
5282 /* Skip static symbols. */
5283 switch (MSYMBOL_TYPE (msymbol))
5295 /* Get the hash index and check all the symbols
5296 under that hash index. */
5298 hash = hashname (SYMBOL_NAME (msymbol));
5300 for (sym = global_sym_chain[hash]; sym;)
5302 if (SYMBOL_NAME (msymbol)[0] == SYMBOL_NAME (sym)[0] &&
5303 STREQ (SYMBOL_NAME (msymbol) + 1, SYMBOL_NAME (sym) + 1))
5306 struct alias_list *aliases;
5308 /* Splice this symbol out of the hash chain and
5309 assign the value we have to it. */
5312 SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
5316 global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
5319 /* Check to see whether we need to fix up a common block. */
5320 /* Note: this code might be executed several times for
5321 the same symbol if there are multiple references. */
5323 /* If symbol has aliases, do minimal symbol fixups for each.
5324 These live aliases/references weren't added to
5325 global_sym_chain hash but may also need to be fixed up. */
5326 /* FIXME: Maybe should have added aliases to the global chain, resolved symbol name, then treated aliases as normal
5327 symbols? Still, we wouldn't want to add_to_list. */
5328 /* Now do the same for each alias of this symbol */
5330 aliases = SYMBOL_ALIASES (sym);
5333 if (SYMBOL_CLASS (rsym) == LOC_BLOCK)
5335 fix_common_block (rsym,
5336 SYMBOL_VALUE_ADDRESS (msymbol));
5340 SYMBOL_VALUE_ADDRESS (rsym)
5341 = SYMBOL_VALUE_ADDRESS (msymbol);
5343 SYMBOL_SECTION (rsym) = SYMBOL_SECTION (msymbol);
5346 rsym = aliases->sym;
5347 aliases = aliases->next;
5356 sym = SYMBOL_VALUE_CHAIN (prev);
5360 sym = global_sym_chain[hash];
5366 sym = SYMBOL_VALUE_CHAIN (sym);
5370 if (resolve_objfile == objfile)
5372 resolve_objfile = objfile;
5375 /* Change the storage class of any remaining unresolved globals to
5376 LOC_UNRESOLVED and remove them from the chain. */
5377 for (hash = 0; hash < HASHSIZE; hash++)
5379 sym = global_sym_chain[hash];
5383 sym = SYMBOL_VALUE_CHAIN (sym);
5385 /* Change the symbol address from the misleading chain value
5387 SYMBOL_VALUE_ADDRESS (prev) = 0;
5389 /* Complain about unresolved common block symbols. */
5390 if (SYMBOL_CLASS (prev) == LOC_STATIC)
5391 SYMBOL_CLASS (prev) = LOC_UNRESOLVED;
5393 complaint (&symfile_complaints,
5394 "%s: common block `%s' from global_sym_chain unresolved",
5395 objfile->name, SYMBOL_NAME (prev));
5398 memset (global_sym_chain, 0, sizeof (global_sym_chain));
5401 /* Initialize anything that needs initializing when starting to read
5402 a fresh piece of a symbol file, e.g. reading in the stuff corresponding
5406 stabsread_init (void)
5410 /* Initialize anything that needs initializing when a completely new
5411 symbol file is specified (not just adding some symbols from another
5412 file, e.g. a shared library). */
5415 stabsread_new_init (void)
5417 /* Empty the hash table of global syms looking for values. */
5418 memset (global_sym_chain, 0, sizeof (global_sym_chain));
5421 /* Initialize anything that needs initializing at the same time as
5422 start_symtab() is called. */
5427 global_stabs = NULL; /* AIX COFF */
5428 /* Leave FILENUM of 0 free for builtin types and this file's types. */
5429 n_this_object_header_files = 1;
5430 type_vector_length = 0;
5431 type_vector = (struct type **) 0;
5433 /* FIXME: If common_block_name is not already NULL, we should complain(). */
5434 common_block_name = NULL;
5437 /* Call after end_symtab() */
5444 xfree (type_vector);
5447 type_vector_length = 0;
5448 previous_stab_code = 0;
5452 finish_global_stabs (struct objfile *objfile)
5456 patch_block_stabs (global_symbols, global_stabs, objfile);
5457 xfree (global_stabs);
5458 global_stabs = NULL;
5462 /* Find the end of the name, delimited by a ':', but don't match
5463 ObjC symbols which look like -[Foo bar::]:bla. */
5465 find_name_end (char *name)
5468 if (s[0] == '-' || *s == '+')
5470 /* Must be an ObjC method symbol. */
5473 error ("invalid symbol name \"%s\"", name);
5475 s = strchr (s, ']');
5478 error ("invalid symbol name \"%s\"", name);
5480 return strchr (s, ':');
5484 return strchr (s, ':');
5488 /* Initializer for this module */
5491 _initialize_stabsread (void)
5493 undef_types_allocated = 20;
5494 undef_types_length = 0;
5495 undef_types = (struct type **)
5496 xmalloc (undef_types_allocated * sizeof (struct type *));