1 /* Support routines for manipulating internal types for GDB.
3 Copyright (C) 1992-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
29 #include "expression.h"
34 #include "complaints.h"
37 #include "gdb_assert.h"
39 #include "exceptions.h"
40 #include "cp-support.h"
42 #include "dwarf2loc.h"
45 /* Initialize BADNESS constants. */
47 const struct rank LENGTH_MISMATCH_BADNESS = {100,0};
49 const struct rank TOO_FEW_PARAMS_BADNESS = {100,0};
50 const struct rank INCOMPATIBLE_TYPE_BADNESS = {100,0};
52 const struct rank EXACT_MATCH_BADNESS = {0,0};
54 const struct rank INTEGER_PROMOTION_BADNESS = {1,0};
55 const struct rank FLOAT_PROMOTION_BADNESS = {1,0};
56 const struct rank BASE_PTR_CONVERSION_BADNESS = {1,0};
57 const struct rank INTEGER_CONVERSION_BADNESS = {2,0};
58 const struct rank FLOAT_CONVERSION_BADNESS = {2,0};
59 const struct rank INT_FLOAT_CONVERSION_BADNESS = {2,0};
60 const struct rank VOID_PTR_CONVERSION_BADNESS = {2,0};
61 const struct rank BOOL_CONVERSION_BADNESS = {3,0};
62 const struct rank BASE_CONVERSION_BADNESS = {2,0};
63 const struct rank REFERENCE_CONVERSION_BADNESS = {2,0};
64 const struct rank NULL_POINTER_CONVERSION_BADNESS = {2,0};
65 const struct rank NS_POINTER_CONVERSION_BADNESS = {10,0};
66 const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS = {3,0};
68 /* Floatformat pairs. */
69 const struct floatformat *floatformats_ieee_half[BFD_ENDIAN_UNKNOWN] = {
70 &floatformat_ieee_half_big,
71 &floatformat_ieee_half_little
73 const struct floatformat *floatformats_ieee_single[BFD_ENDIAN_UNKNOWN] = {
74 &floatformat_ieee_single_big,
75 &floatformat_ieee_single_little
77 const struct floatformat *floatformats_ieee_double[BFD_ENDIAN_UNKNOWN] = {
78 &floatformat_ieee_double_big,
79 &floatformat_ieee_double_little
81 const struct floatformat *floatformats_ieee_double_littlebyte_bigword[BFD_ENDIAN_UNKNOWN] = {
82 &floatformat_ieee_double_big,
83 &floatformat_ieee_double_littlebyte_bigword
85 const struct floatformat *floatformats_i387_ext[BFD_ENDIAN_UNKNOWN] = {
86 &floatformat_i387_ext,
89 const struct floatformat *floatformats_m68881_ext[BFD_ENDIAN_UNKNOWN] = {
90 &floatformat_m68881_ext,
91 &floatformat_m68881_ext
93 const struct floatformat *floatformats_arm_ext[BFD_ENDIAN_UNKNOWN] = {
94 &floatformat_arm_ext_big,
95 &floatformat_arm_ext_littlebyte_bigword
97 const struct floatformat *floatformats_ia64_spill[BFD_ENDIAN_UNKNOWN] = {
98 &floatformat_ia64_spill_big,
99 &floatformat_ia64_spill_little
101 const struct floatformat *floatformats_ia64_quad[BFD_ENDIAN_UNKNOWN] = {
102 &floatformat_ia64_quad_big,
103 &floatformat_ia64_quad_little
105 const struct floatformat *floatformats_vax_f[BFD_ENDIAN_UNKNOWN] = {
109 const struct floatformat *floatformats_vax_d[BFD_ENDIAN_UNKNOWN] = {
113 const struct floatformat *floatformats_ibm_long_double[BFD_ENDIAN_UNKNOWN] = {
114 &floatformat_ibm_long_double_big,
115 &floatformat_ibm_long_double_little
118 /* Should opaque types be resolved? */
120 static int opaque_type_resolution = 1;
122 /* A flag to enable printing of debugging information of C++
125 unsigned int overload_debug = 0;
127 /* A flag to enable strict type checking. */
129 static int strict_type_checking = 1;
131 /* A function to show whether opaque types are resolved. */
134 show_opaque_type_resolution (struct ui_file *file, int from_tty,
135 struct cmd_list_element *c,
138 fprintf_filtered (file, _("Resolution of opaque struct/class/union types "
139 "(if set before loading symbols) is %s.\n"),
143 /* A function to show whether C++ overload debugging is enabled. */
146 show_overload_debug (struct ui_file *file, int from_tty,
147 struct cmd_list_element *c, const char *value)
149 fprintf_filtered (file, _("Debugging of C++ overloading is %s.\n"),
153 /* A function to show the status of strict type checking. */
156 show_strict_type_checking (struct ui_file *file, int from_tty,
157 struct cmd_list_element *c, const char *value)
159 fprintf_filtered (file, _("Strict type checking is %s.\n"), value);
163 /* Allocate a new OBJFILE-associated type structure and fill it
164 with some defaults. Space for the type structure is allocated
165 on the objfile's objfile_obstack. */
168 alloc_type (struct objfile *objfile)
172 gdb_assert (objfile != NULL);
174 /* Alloc the structure and start off with all fields zeroed. */
175 type = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct type);
176 TYPE_MAIN_TYPE (type) = OBSTACK_ZALLOC (&objfile->objfile_obstack,
178 OBJSTAT (objfile, n_types++);
180 TYPE_OBJFILE_OWNED (type) = 1;
181 TYPE_OWNER (type).objfile = objfile;
183 /* Initialize the fields that might not be zero. */
185 TYPE_CODE (type) = TYPE_CODE_UNDEF;
186 TYPE_VPTR_FIELDNO (type) = -1;
187 TYPE_CHAIN (type) = type; /* Chain back to itself. */
192 /* Allocate a new GDBARCH-associated type structure and fill it
193 with some defaults. Space for the type structure is allocated
197 alloc_type_arch (struct gdbarch *gdbarch)
201 gdb_assert (gdbarch != NULL);
203 /* Alloc the structure and start off with all fields zeroed. */
205 type = XCNEW (struct type);
206 TYPE_MAIN_TYPE (type) = XCNEW (struct main_type);
208 TYPE_OBJFILE_OWNED (type) = 0;
209 TYPE_OWNER (type).gdbarch = gdbarch;
211 /* Initialize the fields that might not be zero. */
213 TYPE_CODE (type) = TYPE_CODE_UNDEF;
214 TYPE_VPTR_FIELDNO (type) = -1;
215 TYPE_CHAIN (type) = type; /* Chain back to itself. */
220 /* If TYPE is objfile-associated, allocate a new type structure
221 associated with the same objfile. If TYPE is gdbarch-associated,
222 allocate a new type structure associated with the same gdbarch. */
225 alloc_type_copy (const struct type *type)
227 if (TYPE_OBJFILE_OWNED (type))
228 return alloc_type (TYPE_OWNER (type).objfile);
230 return alloc_type_arch (TYPE_OWNER (type).gdbarch);
233 /* If TYPE is gdbarch-associated, return that architecture.
234 If TYPE is objfile-associated, return that objfile's architecture. */
237 get_type_arch (const struct type *type)
239 if (TYPE_OBJFILE_OWNED (type))
240 return get_objfile_arch (TYPE_OWNER (type).objfile);
242 return TYPE_OWNER (type).gdbarch;
245 /* See gdbtypes.h. */
248 get_target_type (struct type *type)
252 type = TYPE_TARGET_TYPE (type);
254 type = check_typedef (type);
260 /* Alloc a new type instance structure, fill it with some defaults,
261 and point it at OLDTYPE. Allocate the new type instance from the
262 same place as OLDTYPE. */
265 alloc_type_instance (struct type *oldtype)
269 /* Allocate the structure. */
271 if (! TYPE_OBJFILE_OWNED (oldtype))
272 type = XCNEW (struct type);
274 type = OBSTACK_ZALLOC (&TYPE_OBJFILE (oldtype)->objfile_obstack,
277 TYPE_MAIN_TYPE (type) = TYPE_MAIN_TYPE (oldtype);
279 TYPE_CHAIN (type) = type; /* Chain back to itself for now. */
284 /* Clear all remnants of the previous type at TYPE, in preparation for
285 replacing it with something else. Preserve owner information. */
288 smash_type (struct type *type)
290 int objfile_owned = TYPE_OBJFILE_OWNED (type);
291 union type_owner owner = TYPE_OWNER (type);
293 memset (TYPE_MAIN_TYPE (type), 0, sizeof (struct main_type));
295 /* Restore owner information. */
296 TYPE_OBJFILE_OWNED (type) = objfile_owned;
297 TYPE_OWNER (type) = owner;
299 /* For now, delete the rings. */
300 TYPE_CHAIN (type) = type;
302 /* For now, leave the pointer/reference types alone. */
305 /* Lookup a pointer to a type TYPE. TYPEPTR, if nonzero, points
306 to a pointer to memory where the pointer type should be stored.
307 If *TYPEPTR is zero, update it to point to the pointer type we return.
308 We allocate new memory if needed. */
311 make_pointer_type (struct type *type, struct type **typeptr)
313 struct type *ntype; /* New type */
316 ntype = TYPE_POINTER_TYPE (type);
321 return ntype; /* Don't care about alloc,
322 and have new type. */
323 else if (*typeptr == 0)
325 *typeptr = ntype; /* Tracking alloc, and have new type. */
330 if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */
332 ntype = alloc_type_copy (type);
336 else /* We have storage, but need to reset it. */
339 chain = TYPE_CHAIN (ntype);
341 TYPE_CHAIN (ntype) = chain;
344 TYPE_TARGET_TYPE (ntype) = type;
345 TYPE_POINTER_TYPE (type) = ntype;
347 /* FIXME! Assumes the machine has only one representation for pointers! */
350 = gdbarch_ptr_bit (get_type_arch (type)) / TARGET_CHAR_BIT;
351 TYPE_CODE (ntype) = TYPE_CODE_PTR;
353 /* Mark pointers as unsigned. The target converts between pointers
354 and addresses (CORE_ADDRs) using gdbarch_pointer_to_address and
355 gdbarch_address_to_pointer. */
356 TYPE_UNSIGNED (ntype) = 1;
358 /* Update the length of all the other variants of this type. */
359 chain = TYPE_CHAIN (ntype);
360 while (chain != ntype)
362 TYPE_LENGTH (chain) = TYPE_LENGTH (ntype);
363 chain = TYPE_CHAIN (chain);
369 /* Given a type TYPE, return a type of pointers to that type.
370 May need to construct such a type if this is the first use. */
373 lookup_pointer_type (struct type *type)
375 return make_pointer_type (type, (struct type **) 0);
378 /* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero,
379 points to a pointer to memory where the reference type should be
380 stored. If *TYPEPTR is zero, update it to point to the reference
381 type we return. We allocate new memory if needed. */
384 make_reference_type (struct type *type, struct type **typeptr)
386 struct type *ntype; /* New type */
389 ntype = TYPE_REFERENCE_TYPE (type);
394 return ntype; /* Don't care about alloc,
395 and have new type. */
396 else if (*typeptr == 0)
398 *typeptr = ntype; /* Tracking alloc, and have new type. */
403 if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */
405 ntype = alloc_type_copy (type);
409 else /* We have storage, but need to reset it. */
412 chain = TYPE_CHAIN (ntype);
414 TYPE_CHAIN (ntype) = chain;
417 TYPE_TARGET_TYPE (ntype) = type;
418 TYPE_REFERENCE_TYPE (type) = ntype;
420 /* FIXME! Assume the machine has only one representation for
421 references, and that it matches the (only) representation for
424 TYPE_LENGTH (ntype) =
425 gdbarch_ptr_bit (get_type_arch (type)) / TARGET_CHAR_BIT;
426 TYPE_CODE (ntype) = TYPE_CODE_REF;
428 if (!TYPE_REFERENCE_TYPE (type)) /* Remember it, if don't have one. */
429 TYPE_REFERENCE_TYPE (type) = ntype;
431 /* Update the length of all the other variants of this type. */
432 chain = TYPE_CHAIN (ntype);
433 while (chain != ntype)
435 TYPE_LENGTH (chain) = TYPE_LENGTH (ntype);
436 chain = TYPE_CHAIN (chain);
442 /* Same as above, but caller doesn't care about memory allocation
446 lookup_reference_type (struct type *type)
448 return make_reference_type (type, (struct type **) 0);
451 /* Lookup a function type that returns type TYPE. TYPEPTR, if
452 nonzero, points to a pointer to memory where the function type
453 should be stored. If *TYPEPTR is zero, update it to point to the
454 function type we return. We allocate new memory if needed. */
457 make_function_type (struct type *type, struct type **typeptr)
459 struct type *ntype; /* New type */
461 if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */
463 ntype = alloc_type_copy (type);
467 else /* We have storage, but need to reset it. */
473 TYPE_TARGET_TYPE (ntype) = type;
475 TYPE_LENGTH (ntype) = 1;
476 TYPE_CODE (ntype) = TYPE_CODE_FUNC;
478 INIT_FUNC_SPECIFIC (ntype);
483 /* Given a type TYPE, return a type of functions that return that type.
484 May need to construct such a type if this is the first use. */
487 lookup_function_type (struct type *type)
489 return make_function_type (type, (struct type **) 0);
492 /* Given a type TYPE and argument types, return the appropriate
493 function type. If the final type in PARAM_TYPES is NULL, make a
497 lookup_function_type_with_arguments (struct type *type,
499 struct type **param_types)
501 struct type *fn = make_function_type (type, (struct type **) 0);
506 if (param_types[nparams - 1] == NULL)
509 TYPE_VARARGS (fn) = 1;
511 else if (TYPE_CODE (check_typedef (param_types[nparams - 1]))
515 /* Caller should have ensured this. */
516 gdb_assert (nparams == 0);
517 TYPE_PROTOTYPED (fn) = 1;
521 TYPE_NFIELDS (fn) = nparams;
522 TYPE_FIELDS (fn) = TYPE_ZALLOC (fn, nparams * sizeof (struct field));
523 for (i = 0; i < nparams; ++i)
524 TYPE_FIELD_TYPE (fn, i) = param_types[i];
529 /* Identify address space identifier by name --
530 return the integer flag defined in gdbtypes.h. */
533 address_space_name_to_int (struct gdbarch *gdbarch, char *space_identifier)
537 /* Check for known address space delimiters. */
538 if (!strcmp (space_identifier, "code"))
539 return TYPE_INSTANCE_FLAG_CODE_SPACE;
540 else if (!strcmp (space_identifier, "data"))
541 return TYPE_INSTANCE_FLAG_DATA_SPACE;
542 else if (gdbarch_address_class_name_to_type_flags_p (gdbarch)
543 && gdbarch_address_class_name_to_type_flags (gdbarch,
548 error (_("Unknown address space specifier: \"%s\""), space_identifier);
551 /* Identify address space identifier by integer flag as defined in
552 gdbtypes.h -- return the string version of the adress space name. */
555 address_space_int_to_name (struct gdbarch *gdbarch, int space_flag)
557 if (space_flag & TYPE_INSTANCE_FLAG_CODE_SPACE)
559 else if (space_flag & TYPE_INSTANCE_FLAG_DATA_SPACE)
561 else if ((space_flag & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
562 && gdbarch_address_class_type_flags_to_name_p (gdbarch))
563 return gdbarch_address_class_type_flags_to_name (gdbarch, space_flag);
568 /* Create a new type with instance flags NEW_FLAGS, based on TYPE.
570 If STORAGE is non-NULL, create the new type instance there.
571 STORAGE must be in the same obstack as TYPE. */
574 make_qualified_type (struct type *type, int new_flags,
575 struct type *storage)
582 if (TYPE_INSTANCE_FLAGS (ntype) == new_flags)
584 ntype = TYPE_CHAIN (ntype);
586 while (ntype != type);
588 /* Create a new type instance. */
590 ntype = alloc_type_instance (type);
593 /* If STORAGE was provided, it had better be in the same objfile
594 as TYPE. Otherwise, we can't link it into TYPE's cv chain:
595 if one objfile is freed and the other kept, we'd have
596 dangling pointers. */
597 gdb_assert (TYPE_OBJFILE (type) == TYPE_OBJFILE (storage));
600 TYPE_MAIN_TYPE (ntype) = TYPE_MAIN_TYPE (type);
601 TYPE_CHAIN (ntype) = ntype;
604 /* Pointers or references to the original type are not relevant to
606 TYPE_POINTER_TYPE (ntype) = (struct type *) 0;
607 TYPE_REFERENCE_TYPE (ntype) = (struct type *) 0;
609 /* Chain the new qualified type to the old type. */
610 TYPE_CHAIN (ntype) = TYPE_CHAIN (type);
611 TYPE_CHAIN (type) = ntype;
613 /* Now set the instance flags and return the new type. */
614 TYPE_INSTANCE_FLAGS (ntype) = new_flags;
616 /* Set length of new type to that of the original type. */
617 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
622 /* Make an address-space-delimited variant of a type -- a type that
623 is identical to the one supplied except that it has an address
624 space attribute attached to it (such as "code" or "data").
626 The space attributes "code" and "data" are for Harvard
627 architectures. The address space attributes are for architectures
628 which have alternately sized pointers or pointers with alternate
632 make_type_with_address_space (struct type *type, int space_flag)
634 int new_flags = ((TYPE_INSTANCE_FLAGS (type)
635 & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
636 | TYPE_INSTANCE_FLAG_DATA_SPACE
637 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL))
640 return make_qualified_type (type, new_flags, NULL);
643 /* Make a "c-v" variant of a type -- a type that is identical to the
644 one supplied except that it may have const or volatile attributes
645 CNST is a flag for setting the const attribute
646 VOLTL is a flag for setting the volatile attribute
647 TYPE is the base type whose variant we are creating.
649 If TYPEPTR and *TYPEPTR are non-zero, then *TYPEPTR points to
650 storage to hold the new qualified type; *TYPEPTR and TYPE must be
651 in the same objfile. Otherwise, allocate fresh memory for the new
652 type whereever TYPE lives. If TYPEPTR is non-zero, set it to the
653 new type we construct. */
656 make_cv_type (int cnst, int voltl,
658 struct type **typeptr)
660 struct type *ntype; /* New type */
662 int new_flags = (TYPE_INSTANCE_FLAGS (type)
663 & ~(TYPE_INSTANCE_FLAG_CONST
664 | TYPE_INSTANCE_FLAG_VOLATILE));
667 new_flags |= TYPE_INSTANCE_FLAG_CONST;
670 new_flags |= TYPE_INSTANCE_FLAG_VOLATILE;
672 if (typeptr && *typeptr != NULL)
674 /* TYPE and *TYPEPTR must be in the same objfile. We can't have
675 a C-V variant chain that threads across objfiles: if one
676 objfile gets freed, then the other has a broken C-V chain.
678 This code used to try to copy over the main type from TYPE to
679 *TYPEPTR if they were in different objfiles, but that's
680 wrong, too: TYPE may have a field list or member function
681 lists, which refer to types of their own, etc. etc. The
682 whole shebang would need to be copied over recursively; you
683 can't have inter-objfile pointers. The only thing to do is
684 to leave stub types as stub types, and look them up afresh by
685 name each time you encounter them. */
686 gdb_assert (TYPE_OBJFILE (*typeptr) == TYPE_OBJFILE (type));
689 ntype = make_qualified_type (type, new_flags,
690 typeptr ? *typeptr : NULL);
698 /* Make a 'restrict'-qualified version of TYPE. */
701 make_restrict_type (struct type *type)
703 return make_qualified_type (type,
704 (TYPE_INSTANCE_FLAGS (type)
705 | TYPE_INSTANCE_FLAG_RESTRICT),
709 /* Replace the contents of ntype with the type *type. This changes the
710 contents, rather than the pointer for TYPE_MAIN_TYPE (ntype); thus
711 the changes are propogated to all types in the TYPE_CHAIN.
713 In order to build recursive types, it's inevitable that we'll need
714 to update types in place --- but this sort of indiscriminate
715 smashing is ugly, and needs to be replaced with something more
716 controlled. TYPE_MAIN_TYPE is a step in this direction; it's not
717 clear if more steps are needed. */
720 replace_type (struct type *ntype, struct type *type)
724 /* These two types had better be in the same objfile. Otherwise,
725 the assignment of one type's main type structure to the other
726 will produce a type with references to objects (names; field
727 lists; etc.) allocated on an objfile other than its own. */
728 gdb_assert (TYPE_OBJFILE (ntype) == TYPE_OBJFILE (ntype));
730 *TYPE_MAIN_TYPE (ntype) = *TYPE_MAIN_TYPE (type);
732 /* The type length is not a part of the main type. Update it for
733 each type on the variant chain. */
737 /* Assert that this element of the chain has no address-class bits
738 set in its flags. Such type variants might have type lengths
739 which are supposed to be different from the non-address-class
740 variants. This assertion shouldn't ever be triggered because
741 symbol readers which do construct address-class variants don't
742 call replace_type(). */
743 gdb_assert (TYPE_ADDRESS_CLASS_ALL (chain) == 0);
745 TYPE_LENGTH (chain) = TYPE_LENGTH (type);
746 chain = TYPE_CHAIN (chain);
748 while (ntype != chain);
750 /* Assert that the two types have equivalent instance qualifiers.
751 This should be true for at least all of our debug readers. */
752 gdb_assert (TYPE_INSTANCE_FLAGS (ntype) == TYPE_INSTANCE_FLAGS (type));
755 /* Implement direct support for MEMBER_TYPE in GNU C++.
756 May need to construct such a type if this is the first use.
757 The TYPE is the type of the member. The DOMAIN is the type
758 of the aggregate that the member belongs to. */
761 lookup_memberptr_type (struct type *type, struct type *domain)
765 mtype = alloc_type_copy (type);
766 smash_to_memberptr_type (mtype, domain, type);
770 /* Return a pointer-to-method type, for a method of type TO_TYPE. */
773 lookup_methodptr_type (struct type *to_type)
777 mtype = alloc_type_copy (to_type);
778 smash_to_methodptr_type (mtype, to_type);
782 /* Allocate a stub method whose return type is TYPE. This apparently
783 happens for speed of symbol reading, since parsing out the
784 arguments to the method is cpu-intensive, the way we are doing it.
785 So, we will fill in arguments later. This always returns a fresh
789 allocate_stub_method (struct type *type)
793 mtype = alloc_type_copy (type);
794 TYPE_CODE (mtype) = TYPE_CODE_METHOD;
795 TYPE_LENGTH (mtype) = 1;
796 TYPE_STUB (mtype) = 1;
797 TYPE_TARGET_TYPE (mtype) = type;
798 /* _DOMAIN_TYPE (mtype) = unknown yet */
802 /* Create a range type with a dynamic range from LOW_BOUND to
803 HIGH_BOUND, inclusive. See create_range_type for further details. */
806 create_range_type (struct type *result_type, struct type *index_type,
807 const struct dynamic_prop *low_bound,
808 const struct dynamic_prop *high_bound)
810 if (result_type == NULL)
811 result_type = alloc_type_copy (index_type);
812 TYPE_CODE (result_type) = TYPE_CODE_RANGE;
813 TYPE_TARGET_TYPE (result_type) = index_type;
814 if (TYPE_STUB (index_type))
815 TYPE_TARGET_STUB (result_type) = 1;
817 TYPE_LENGTH (result_type) = TYPE_LENGTH (check_typedef (index_type));
819 TYPE_RANGE_DATA (result_type) = (struct range_bounds *)
820 TYPE_ZALLOC (result_type, sizeof (struct range_bounds));
821 TYPE_RANGE_DATA (result_type)->low = *low_bound;
822 TYPE_RANGE_DATA (result_type)->high = *high_bound;
824 if (low_bound->kind == PROP_CONST && low_bound->data.const_val >= 0)
825 TYPE_UNSIGNED (result_type) = 1;
830 /* Create a range type using either a blank type supplied in
831 RESULT_TYPE, or creating a new type, inheriting the objfile from
834 Indices will be of type INDEX_TYPE, and will range from LOW_BOUND
835 to HIGH_BOUND, inclusive.
837 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
838 sure it is TYPE_CODE_UNDEF before we bash it into a range type? */
841 create_static_range_type (struct type *result_type, struct type *index_type,
842 LONGEST low_bound, LONGEST high_bound)
844 struct dynamic_prop low, high;
846 low.kind = PROP_CONST;
847 low.data.const_val = low_bound;
849 high.kind = PROP_CONST;
850 high.data.const_val = high_bound;
852 result_type = create_range_type (result_type, index_type, &low, &high);
857 /* Predicate tests whether BOUNDS are static. Returns 1 if all bounds values
858 are static, otherwise returns 0. */
861 has_static_range (const struct range_bounds *bounds)
863 return (bounds->low.kind == PROP_CONST
864 && bounds->high.kind == PROP_CONST);
868 /* Set *LOWP and *HIGHP to the lower and upper bounds of discrete type
869 TYPE. Return 1 if type is a range type, 0 if it is discrete (and
870 bounds will fit in LONGEST), or -1 otherwise. */
873 get_discrete_bounds (struct type *type, LONGEST *lowp, LONGEST *highp)
875 CHECK_TYPEDEF (type);
876 switch (TYPE_CODE (type))
878 case TYPE_CODE_RANGE:
879 *lowp = TYPE_LOW_BOUND (type);
880 *highp = TYPE_HIGH_BOUND (type);
883 if (TYPE_NFIELDS (type) > 0)
885 /* The enums may not be sorted by value, so search all
889 *lowp = *highp = TYPE_FIELD_ENUMVAL (type, 0);
890 for (i = 0; i < TYPE_NFIELDS (type); i++)
892 if (TYPE_FIELD_ENUMVAL (type, i) < *lowp)
893 *lowp = TYPE_FIELD_ENUMVAL (type, i);
894 if (TYPE_FIELD_ENUMVAL (type, i) > *highp)
895 *highp = TYPE_FIELD_ENUMVAL (type, i);
898 /* Set unsigned indicator if warranted. */
901 TYPE_UNSIGNED (type) = 1;
915 if (TYPE_LENGTH (type) > sizeof (LONGEST)) /* Too big */
917 if (!TYPE_UNSIGNED (type))
919 *lowp = -(1 << (TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1));
923 /* ... fall through for unsigned ints ... */
926 /* This round-about calculation is to avoid shifting by
927 TYPE_LENGTH (type) * TARGET_CHAR_BIT, which will not work
928 if TYPE_LENGTH (type) == sizeof (LONGEST). */
929 *highp = 1 << (TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1);
930 *highp = (*highp - 1) | *highp;
937 /* Assuming TYPE is a simple, non-empty array type, compute its upper
938 and lower bound. Save the low bound into LOW_BOUND if not NULL.
939 Save the high bound into HIGH_BOUND if not NULL.
941 Return 1 if the operation was successful. Return zero otherwise,
942 in which case the values of LOW_BOUND and HIGH_BOUNDS are unmodified.
944 We now simply use get_discrete_bounds call to get the values
945 of the low and high bounds.
946 get_discrete_bounds can return three values:
947 1, meaning that index is a range,
948 0, meaning that index is a discrete type,
949 or -1 for failure. */
952 get_array_bounds (struct type *type, LONGEST *low_bound, LONGEST *high_bound)
954 struct type *index = TYPE_INDEX_TYPE (type);
962 res = get_discrete_bounds (index, &low, &high);
966 /* Check if the array bounds are undefined. */
968 && ((low_bound && TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
969 || (high_bound && TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))))
981 /* Create an array type using either a blank type supplied in
982 RESULT_TYPE, or creating a new type, inheriting the objfile from
985 Elements will be of type ELEMENT_TYPE, the indices will be of type
988 If BIT_STRIDE is not zero, build a packed array type whose element
989 size is BIT_STRIDE. Otherwise, ignore this parameter.
991 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
992 sure it is TYPE_CODE_UNDEF before we bash it into an array
996 create_array_type_with_stride (struct type *result_type,
997 struct type *element_type,
998 struct type *range_type,
999 unsigned int bit_stride)
1001 if (result_type == NULL)
1002 result_type = alloc_type_copy (range_type);
1004 TYPE_CODE (result_type) = TYPE_CODE_ARRAY;
1005 TYPE_TARGET_TYPE (result_type) = element_type;
1006 if (has_static_range (TYPE_RANGE_DATA (range_type)))
1008 LONGEST low_bound, high_bound;
1010 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
1011 low_bound = high_bound = 0;
1012 CHECK_TYPEDEF (element_type);
1013 /* Be careful when setting the array length. Ada arrays can be
1014 empty arrays with the high_bound being smaller than the low_bound.
1015 In such cases, the array length should be zero. */
1016 if (high_bound < low_bound)
1017 TYPE_LENGTH (result_type) = 0;
1018 else if (bit_stride > 0)
1019 TYPE_LENGTH (result_type) =
1020 (bit_stride * (high_bound - low_bound + 1) + 7) / 8;
1022 TYPE_LENGTH (result_type) =
1023 TYPE_LENGTH (element_type) * (high_bound - low_bound + 1);
1027 /* This type is dynamic and its length needs to be computed
1028 on demand. In the meantime, avoid leaving the TYPE_LENGTH
1029 undefined by setting it to zero. Although we are not expected
1030 to trust TYPE_LENGTH in this case, setting the size to zero
1031 allows us to avoid allocating objects of random sizes in case
1032 we accidently do. */
1033 TYPE_LENGTH (result_type) = 0;
1036 TYPE_NFIELDS (result_type) = 1;
1037 TYPE_FIELDS (result_type) =
1038 (struct field *) TYPE_ZALLOC (result_type, sizeof (struct field));
1039 TYPE_INDEX_TYPE (result_type) = range_type;
1040 TYPE_VPTR_FIELDNO (result_type) = -1;
1042 TYPE_FIELD_BITSIZE (result_type, 0) = bit_stride;
1044 /* TYPE_FLAG_TARGET_STUB will take care of zero length arrays. */
1045 if (TYPE_LENGTH (result_type) == 0)
1046 TYPE_TARGET_STUB (result_type) = 1;
1051 /* Same as create_array_type_with_stride but with no bit_stride
1052 (BIT_STRIDE = 0), thus building an unpacked array. */
1055 create_array_type (struct type *result_type,
1056 struct type *element_type,
1057 struct type *range_type)
1059 return create_array_type_with_stride (result_type, element_type,
1064 lookup_array_range_type (struct type *element_type,
1065 LONGEST low_bound, LONGEST high_bound)
1067 struct gdbarch *gdbarch = get_type_arch (element_type);
1068 struct type *index_type = builtin_type (gdbarch)->builtin_int;
1069 struct type *range_type
1070 = create_static_range_type (NULL, index_type, low_bound, high_bound);
1072 return create_array_type (NULL, element_type, range_type);
1075 /* Create a string type using either a blank type supplied in
1076 RESULT_TYPE, or creating a new type. String types are similar
1077 enough to array of char types that we can use create_array_type to
1078 build the basic type and then bash it into a string type.
1080 For fixed length strings, the range type contains 0 as the lower
1081 bound and the length of the string minus one as the upper bound.
1083 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1084 sure it is TYPE_CODE_UNDEF before we bash it into a string
1088 create_string_type (struct type *result_type,
1089 struct type *string_char_type,
1090 struct type *range_type)
1092 result_type = create_array_type (result_type,
1095 TYPE_CODE (result_type) = TYPE_CODE_STRING;
1100 lookup_string_range_type (struct type *string_char_type,
1101 LONGEST low_bound, LONGEST high_bound)
1103 struct type *result_type;
1105 result_type = lookup_array_range_type (string_char_type,
1106 low_bound, high_bound);
1107 TYPE_CODE (result_type) = TYPE_CODE_STRING;
1112 create_set_type (struct type *result_type, struct type *domain_type)
1114 if (result_type == NULL)
1115 result_type = alloc_type_copy (domain_type);
1117 TYPE_CODE (result_type) = TYPE_CODE_SET;
1118 TYPE_NFIELDS (result_type) = 1;
1119 TYPE_FIELDS (result_type) = TYPE_ZALLOC (result_type, sizeof (struct field));
1121 if (!TYPE_STUB (domain_type))
1123 LONGEST low_bound, high_bound, bit_length;
1125 if (get_discrete_bounds (domain_type, &low_bound, &high_bound) < 0)
1126 low_bound = high_bound = 0;
1127 bit_length = high_bound - low_bound + 1;
1128 TYPE_LENGTH (result_type)
1129 = (bit_length + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
1131 TYPE_UNSIGNED (result_type) = 1;
1133 TYPE_FIELD_TYPE (result_type, 0) = domain_type;
1138 /* Convert ARRAY_TYPE to a vector type. This may modify ARRAY_TYPE
1139 and any array types nested inside it. */
1142 make_vector_type (struct type *array_type)
1144 struct type *inner_array, *elt_type;
1147 /* Find the innermost array type, in case the array is
1148 multi-dimensional. */
1149 inner_array = array_type;
1150 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
1151 inner_array = TYPE_TARGET_TYPE (inner_array);
1153 elt_type = TYPE_TARGET_TYPE (inner_array);
1154 if (TYPE_CODE (elt_type) == TYPE_CODE_INT)
1156 flags = TYPE_INSTANCE_FLAGS (elt_type) | TYPE_INSTANCE_FLAG_NOTTEXT;
1157 elt_type = make_qualified_type (elt_type, flags, NULL);
1158 TYPE_TARGET_TYPE (inner_array) = elt_type;
1161 TYPE_VECTOR (array_type) = 1;
1165 init_vector_type (struct type *elt_type, int n)
1167 struct type *array_type;
1169 array_type = lookup_array_range_type (elt_type, 0, n - 1);
1170 make_vector_type (array_type);
1174 /* Smash TYPE to be a type of pointers to members of DOMAIN with type
1175 TO_TYPE. A member pointer is a wierd thing -- it amounts to a
1176 typed offset into a struct, e.g. "an int at offset 8". A MEMBER
1177 TYPE doesn't include the offset (that's the value of the MEMBER
1178 itself), but does include the structure type into which it points
1181 When "smashing" the type, we preserve the objfile that the old type
1182 pointed to, since we aren't changing where the type is actually
1186 smash_to_memberptr_type (struct type *type, struct type *domain,
1187 struct type *to_type)
1190 TYPE_TARGET_TYPE (type) = to_type;
1191 TYPE_DOMAIN_TYPE (type) = domain;
1192 /* Assume that a data member pointer is the same size as a normal
1195 = gdbarch_ptr_bit (get_type_arch (to_type)) / TARGET_CHAR_BIT;
1196 TYPE_CODE (type) = TYPE_CODE_MEMBERPTR;
1199 /* Smash TYPE to be a type of pointer to methods type TO_TYPE.
1201 When "smashing" the type, we preserve the objfile that the old type
1202 pointed to, since we aren't changing where the type is actually
1206 smash_to_methodptr_type (struct type *type, struct type *to_type)
1209 TYPE_TARGET_TYPE (type) = to_type;
1210 TYPE_DOMAIN_TYPE (type) = TYPE_DOMAIN_TYPE (to_type);
1211 TYPE_LENGTH (type) = cplus_method_ptr_size (to_type);
1212 TYPE_CODE (type) = TYPE_CODE_METHODPTR;
1215 /* Smash TYPE to be a type of method of DOMAIN with type TO_TYPE.
1216 METHOD just means `function that gets an extra "this" argument'.
1218 When "smashing" the type, we preserve the objfile that the old type
1219 pointed to, since we aren't changing where the type is actually
1223 smash_to_method_type (struct type *type, struct type *domain,
1224 struct type *to_type, struct field *args,
1225 int nargs, int varargs)
1228 TYPE_TARGET_TYPE (type) = to_type;
1229 TYPE_DOMAIN_TYPE (type) = domain;
1230 TYPE_FIELDS (type) = args;
1231 TYPE_NFIELDS (type) = nargs;
1233 TYPE_VARARGS (type) = 1;
1234 TYPE_LENGTH (type) = 1; /* In practice, this is never needed. */
1235 TYPE_CODE (type) = TYPE_CODE_METHOD;
1238 /* Return a typename for a struct/union/enum type without "struct ",
1239 "union ", or "enum ". If the type has a NULL name, return NULL. */
1242 type_name_no_tag (const struct type *type)
1244 if (TYPE_TAG_NAME (type) != NULL)
1245 return TYPE_TAG_NAME (type);
1247 /* Is there code which expects this to return the name if there is
1248 no tag name? My guess is that this is mainly used for C++ in
1249 cases where the two will always be the same. */
1250 return TYPE_NAME (type);
1253 /* A wrapper of type_name_no_tag which calls error if the type is anonymous.
1254 Since GCC PR debug/47510 DWARF provides associated information to detect the
1255 anonymous class linkage name from its typedef.
1257 Parameter TYPE should not yet have CHECK_TYPEDEF applied, this function will
1261 type_name_no_tag_or_error (struct type *type)
1263 struct type *saved_type = type;
1265 struct objfile *objfile;
1267 CHECK_TYPEDEF (type);
1269 name = type_name_no_tag (type);
1273 name = type_name_no_tag (saved_type);
1274 objfile = TYPE_OBJFILE (saved_type);
1275 error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
1276 name ? name : "<anonymous>",
1277 objfile ? objfile_name (objfile) : "<arch>");
1280 /* Lookup a typedef or primitive type named NAME, visible in lexical
1281 block BLOCK. If NOERR is nonzero, return zero if NAME is not
1282 suitably defined. */
1285 lookup_typename (const struct language_defn *language,
1286 struct gdbarch *gdbarch, const char *name,
1287 const struct block *block, int noerr)
1292 sym = lookup_symbol (name, block, VAR_DOMAIN, 0);
1293 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1294 return SYMBOL_TYPE (sym);
1296 type = language_lookup_primitive_type_by_name (language, gdbarch, name);
1302 error (_("No type named %s."), name);
1306 lookup_unsigned_typename (const struct language_defn *language,
1307 struct gdbarch *gdbarch, const char *name)
1309 char *uns = alloca (strlen (name) + 10);
1311 strcpy (uns, "unsigned ");
1312 strcpy (uns + 9, name);
1313 return lookup_typename (language, gdbarch, uns, (struct block *) NULL, 0);
1317 lookup_signed_typename (const struct language_defn *language,
1318 struct gdbarch *gdbarch, const char *name)
1321 char *uns = alloca (strlen (name) + 8);
1323 strcpy (uns, "signed ");
1324 strcpy (uns + 7, name);
1325 t = lookup_typename (language, gdbarch, uns, (struct block *) NULL, 1);
1326 /* If we don't find "signed FOO" just try again with plain "FOO". */
1329 return lookup_typename (language, gdbarch, name, (struct block *) NULL, 0);
1332 /* Lookup a structure type named "struct NAME",
1333 visible in lexical block BLOCK. */
1336 lookup_struct (const char *name, const struct block *block)
1340 sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
1344 error (_("No struct type named %s."), name);
1346 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
1348 error (_("This context has class, union or enum %s, not a struct."),
1351 return (SYMBOL_TYPE (sym));
1354 /* Lookup a union type named "union NAME",
1355 visible in lexical block BLOCK. */
1358 lookup_union (const char *name, const struct block *block)
1363 sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
1366 error (_("No union type named %s."), name);
1368 t = SYMBOL_TYPE (sym);
1370 if (TYPE_CODE (t) == TYPE_CODE_UNION)
1373 /* If we get here, it's not a union. */
1374 error (_("This context has class, struct or enum %s, not a union."),
1378 /* Lookup an enum type named "enum NAME",
1379 visible in lexical block BLOCK. */
1382 lookup_enum (const char *name, const struct block *block)
1386 sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
1389 error (_("No enum type named %s."), name);
1391 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_ENUM)
1393 error (_("This context has class, struct or union %s, not an enum."),
1396 return (SYMBOL_TYPE (sym));
1399 /* Lookup a template type named "template NAME<TYPE>",
1400 visible in lexical block BLOCK. */
1403 lookup_template_type (char *name, struct type *type,
1404 const struct block *block)
1407 char *nam = (char *)
1408 alloca (strlen (name) + strlen (TYPE_NAME (type)) + 4);
1412 strcat (nam, TYPE_NAME (type));
1413 strcat (nam, " >"); /* FIXME, extra space still introduced in gcc? */
1415 sym = lookup_symbol (nam, block, VAR_DOMAIN, 0);
1419 error (_("No template type named %s."), name);
1421 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
1423 error (_("This context has class, union or enum %s, not a struct."),
1426 return (SYMBOL_TYPE (sym));
1429 /* Given a type TYPE, lookup the type of the component of type named
1432 TYPE can be either a struct or union, or a pointer or reference to
1433 a struct or union. If it is a pointer or reference, its target
1434 type is automatically used. Thus '.' and '->' are interchangable,
1435 as specified for the definitions of the expression element types
1436 STRUCTOP_STRUCT and STRUCTOP_PTR.
1438 If NOERR is nonzero, return zero if NAME is not suitably defined.
1439 If NAME is the name of a baseclass type, return that type. */
1442 lookup_struct_elt_type (struct type *type, const char *name, int noerr)
1449 CHECK_TYPEDEF (type);
1450 if (TYPE_CODE (type) != TYPE_CODE_PTR
1451 && TYPE_CODE (type) != TYPE_CODE_REF)
1453 type = TYPE_TARGET_TYPE (type);
1456 if (TYPE_CODE (type) != TYPE_CODE_STRUCT
1457 && TYPE_CODE (type) != TYPE_CODE_UNION)
1459 typename = type_to_string (type);
1460 make_cleanup (xfree, typename);
1461 error (_("Type %s is not a structure or union type."), typename);
1465 /* FIXME: This change put in by Michael seems incorrect for the case
1466 where the structure tag name is the same as the member name.
1467 I.e. when doing "ptype bell->bar" for "struct foo { int bar; int
1468 foo; } bell;" Disabled by fnf. */
1472 typename = type_name_no_tag (type);
1473 if (typename != NULL && strcmp (typename, name) == 0)
1478 for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
1480 const char *t_field_name = TYPE_FIELD_NAME (type, i);
1482 if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
1484 return TYPE_FIELD_TYPE (type, i);
1486 else if (!t_field_name || *t_field_name == '\0')
1488 struct type *subtype
1489 = lookup_struct_elt_type (TYPE_FIELD_TYPE (type, i), name, 1);
1491 if (subtype != NULL)
1496 /* OK, it's not in this class. Recursively check the baseclasses. */
1497 for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
1501 t = lookup_struct_elt_type (TYPE_BASECLASS (type, i), name, 1);
1513 typename = type_to_string (type);
1514 make_cleanup (xfree, typename);
1515 error (_("Type %s has no component named %s."), typename, name);
1518 /* Store in *MAX the largest number representable by unsigned integer type
1522 get_unsigned_type_max (struct type *type, ULONGEST *max)
1526 CHECK_TYPEDEF (type);
1527 gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && TYPE_UNSIGNED (type));
1528 gdb_assert (TYPE_LENGTH (type) <= sizeof (ULONGEST));
1530 /* Written this way to avoid overflow. */
1531 n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
1532 *max = ((((ULONGEST) 1 << (n - 1)) - 1) << 1) | 1;
1535 /* Store in *MIN, *MAX the smallest and largest numbers representable by
1536 signed integer type TYPE. */
1539 get_signed_type_minmax (struct type *type, LONGEST *min, LONGEST *max)
1543 CHECK_TYPEDEF (type);
1544 gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && !TYPE_UNSIGNED (type));
1545 gdb_assert (TYPE_LENGTH (type) <= sizeof (LONGEST));
1547 n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
1548 *min = -((ULONGEST) 1 << (n - 1));
1549 *max = ((ULONGEST) 1 << (n - 1)) - 1;
1552 /* Lookup the vptr basetype/fieldno values for TYPE.
1553 If found store vptr_basetype in *BASETYPEP if non-NULL, and return
1554 vptr_fieldno. Also, if found and basetype is from the same objfile,
1556 If not found, return -1 and ignore BASETYPEP.
1557 Callers should be aware that in some cases (for example,
1558 the type or one of its baseclasses is a stub type and we are
1559 debugging a .o file, or the compiler uses DWARF-2 and is not GCC),
1560 this function will not be able to find the
1561 virtual function table pointer, and vptr_fieldno will remain -1 and
1562 vptr_basetype will remain NULL or incomplete. */
1565 get_vptr_fieldno (struct type *type, struct type **basetypep)
1567 CHECK_TYPEDEF (type);
1569 if (TYPE_VPTR_FIELDNO (type) < 0)
1573 /* We must start at zero in case the first (and only) baseclass
1574 is virtual (and hence we cannot share the table pointer). */
1575 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
1577 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
1579 struct type *basetype;
1581 fieldno = get_vptr_fieldno (baseclass, &basetype);
1584 /* If the type comes from a different objfile we can't cache
1585 it, it may have a different lifetime. PR 2384 */
1586 if (TYPE_OBJFILE (type) == TYPE_OBJFILE (basetype))
1588 TYPE_VPTR_FIELDNO (type) = fieldno;
1589 TYPE_VPTR_BASETYPE (type) = basetype;
1592 *basetypep = basetype;
1603 *basetypep = TYPE_VPTR_BASETYPE (type);
1604 return TYPE_VPTR_FIELDNO (type);
1609 stub_noname_complaint (void)
1611 complaint (&symfile_complaints, _("stub type has NULL name"));
1614 /* See gdbtypes.h. */
1617 is_dynamic_type (struct type *type)
1619 type = check_typedef (type);
1621 if (TYPE_CODE (type) == TYPE_CODE_REF)
1622 type = check_typedef (TYPE_TARGET_TYPE (type));
1624 switch (TYPE_CODE (type))
1626 case TYPE_CODE_ARRAY:
1628 const struct type *range_type;
1630 gdb_assert (TYPE_NFIELDS (type) == 1);
1631 range_type = TYPE_INDEX_TYPE (type);
1632 if (!has_static_range (TYPE_RANGE_DATA (range_type)))
1635 return is_dynamic_type (TYPE_TARGET_TYPE (type));
1644 /* Resolves dynamic bound values of an array type TYPE to static ones.
1645 ADDRESS might be needed to resolve the subrange bounds, it is the location
1646 of the associated array. */
1648 static struct type *
1649 resolve_dynamic_bounds (struct type *type, CORE_ADDR addr)
1652 struct type *elt_type;
1653 struct type *range_type;
1654 struct type *ary_dim;
1655 const struct dynamic_prop *prop;
1656 const struct dwarf2_locexpr_baton *baton;
1657 struct dynamic_prop low_bound, high_bound;
1659 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
1661 struct type *copy = copy_type (type);
1663 TYPE_TARGET_TYPE (copy)
1664 = resolve_dynamic_bounds (TYPE_TARGET_TYPE (type), addr);
1669 if (TYPE_CODE (type) == TYPE_CODE_REF)
1671 struct type *copy = copy_type (type);
1672 CORE_ADDR target_addr = read_memory_typed_address (addr, type);
1674 TYPE_TARGET_TYPE (copy)
1675 = resolve_dynamic_bounds (TYPE_TARGET_TYPE (type), target_addr);
1679 gdb_assert (TYPE_CODE (type) == TYPE_CODE_ARRAY);
1682 range_type = check_typedef (TYPE_INDEX_TYPE (elt_type));
1684 prop = &TYPE_RANGE_DATA (range_type)->low;
1685 if (dwarf2_evaluate_property (prop, addr, &value))
1687 low_bound.kind = PROP_CONST;
1688 low_bound.data.const_val = value;
1692 low_bound.kind = PROP_UNDEFINED;
1693 low_bound.data.const_val = 0;
1696 prop = &TYPE_RANGE_DATA (range_type)->high;
1697 if (dwarf2_evaluate_property (prop, addr, &value))
1699 high_bound.kind = PROP_CONST;
1700 high_bound.data.const_val = value;
1702 if (TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count)
1703 high_bound.data.const_val
1704 = low_bound.data.const_val + high_bound.data.const_val - 1;
1708 high_bound.kind = PROP_UNDEFINED;
1709 high_bound.data.const_val = 0;
1712 ary_dim = check_typedef (TYPE_TARGET_TYPE (elt_type));
1714 if (ary_dim != NULL && TYPE_CODE (ary_dim) == TYPE_CODE_ARRAY)
1715 elt_type = resolve_dynamic_bounds (TYPE_TARGET_TYPE (type), addr);
1717 elt_type = TYPE_TARGET_TYPE (type);
1719 range_type = create_range_type (NULL,
1720 TYPE_TARGET_TYPE (range_type),
1721 &low_bound, &high_bound);
1722 TYPE_RANGE_DATA (range_type)->flag_bound_evaluated = 1;
1723 return create_array_type (copy_type (type),
1728 /* See gdbtypes.h */
1731 resolve_dynamic_type (struct type *type, CORE_ADDR addr)
1733 struct type *real_type = check_typedef (type);
1734 struct type *resolved_type;
1736 if (!is_dynamic_type (real_type))
1739 resolved_type = resolve_dynamic_bounds (type, addr);
1741 return resolved_type;
1744 /* Find the real type of TYPE. This function returns the real type,
1745 after removing all layers of typedefs, and completing opaque or stub
1746 types. Completion changes the TYPE argument, but stripping of
1749 Instance flags (e.g. const/volatile) are preserved as typedefs are
1750 stripped. If necessary a new qualified form of the underlying type
1753 NOTE: This will return a typedef if TYPE_TARGET_TYPE for the typedef has
1754 not been computed and we're either in the middle of reading symbols, or
1755 there was no name for the typedef in the debug info.
1757 NOTE: Lookup of opaque types can throw errors for invalid symbol files.
1758 QUITs in the symbol reading code can also throw.
1759 Thus this function can throw an exception.
1761 If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
1764 If this is a stubbed struct (i.e. declared as struct foo *), see if
1765 we can find a full definition in some other file. If so, copy this
1766 definition, so we can use it in future. There used to be a comment
1767 (but not any code) that if we don't find a full definition, we'd
1768 set a flag so we don't spend time in the future checking the same
1769 type. That would be a mistake, though--we might load in more
1770 symbols which contain a full definition for the type. */
1773 check_typedef (struct type *type)
1775 struct type *orig_type = type;
1776 /* While we're removing typedefs, we don't want to lose qualifiers.
1777 E.g., const/volatile. */
1778 int instance_flags = TYPE_INSTANCE_FLAGS (type);
1782 while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
1784 if (!TYPE_TARGET_TYPE (type))
1789 /* It is dangerous to call lookup_symbol if we are currently
1790 reading a symtab. Infinite recursion is one danger. */
1791 if (currently_reading_symtab)
1792 return make_qualified_type (type, instance_flags, NULL);
1794 name = type_name_no_tag (type);
1795 /* FIXME: shouldn't we separately check the TYPE_NAME and
1796 the TYPE_TAG_NAME, and look in STRUCT_DOMAIN and/or
1797 VAR_DOMAIN as appropriate? (this code was written before
1798 TYPE_NAME and TYPE_TAG_NAME were separate). */
1801 stub_noname_complaint ();
1802 return make_qualified_type (type, instance_flags, NULL);
1804 sym = lookup_symbol (name, 0, STRUCT_DOMAIN, 0);
1806 TYPE_TARGET_TYPE (type) = SYMBOL_TYPE (sym);
1807 else /* TYPE_CODE_UNDEF */
1808 TYPE_TARGET_TYPE (type) = alloc_type_arch (get_type_arch (type));
1810 type = TYPE_TARGET_TYPE (type);
1812 /* Preserve the instance flags as we traverse down the typedef chain.
1814 Handling address spaces/classes is nasty, what do we do if there's a
1816 E.g., what if an outer typedef marks the type as class_1 and an inner
1817 typedef marks the type as class_2?
1818 This is the wrong place to do such error checking. We leave it to
1819 the code that created the typedef in the first place to flag the
1820 error. We just pick the outer address space (akin to letting the
1821 outer cast in a chain of casting win), instead of assuming
1822 "it can't happen". */
1824 const int ALL_SPACES = (TYPE_INSTANCE_FLAG_CODE_SPACE
1825 | TYPE_INSTANCE_FLAG_DATA_SPACE);
1826 const int ALL_CLASSES = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL;
1827 int new_instance_flags = TYPE_INSTANCE_FLAGS (type);
1829 /* Treat code vs data spaces and address classes separately. */
1830 if ((instance_flags & ALL_SPACES) != 0)
1831 new_instance_flags &= ~ALL_SPACES;
1832 if ((instance_flags & ALL_CLASSES) != 0)
1833 new_instance_flags &= ~ALL_CLASSES;
1835 instance_flags |= new_instance_flags;
1839 /* If this is a struct/class/union with no fields, then check
1840 whether a full definition exists somewhere else. This is for
1841 systems where a type definition with no fields is issued for such
1842 types, instead of identifying them as stub types in the first
1845 if (TYPE_IS_OPAQUE (type)
1846 && opaque_type_resolution
1847 && !currently_reading_symtab)
1849 const char *name = type_name_no_tag (type);
1850 struct type *newtype;
1854 stub_noname_complaint ();
1855 return make_qualified_type (type, instance_flags, NULL);
1857 newtype = lookup_transparent_type (name);
1861 /* If the resolved type and the stub are in the same
1862 objfile, then replace the stub type with the real deal.
1863 But if they're in separate objfiles, leave the stub
1864 alone; we'll just look up the transparent type every time
1865 we call check_typedef. We can't create pointers between
1866 types allocated to different objfiles, since they may
1867 have different lifetimes. Trying to copy NEWTYPE over to
1868 TYPE's objfile is pointless, too, since you'll have to
1869 move over any other types NEWTYPE refers to, which could
1870 be an unbounded amount of stuff. */
1871 if (TYPE_OBJFILE (newtype) == TYPE_OBJFILE (type))
1872 type = make_qualified_type (newtype,
1873 TYPE_INSTANCE_FLAGS (type),
1879 /* Otherwise, rely on the stub flag being set for opaque/stubbed
1881 else if (TYPE_STUB (type) && !currently_reading_symtab)
1883 const char *name = type_name_no_tag (type);
1884 /* FIXME: shouldn't we separately check the TYPE_NAME and the
1885 TYPE_TAG_NAME, and look in STRUCT_DOMAIN and/or VAR_DOMAIN
1886 as appropriate? (this code was written before TYPE_NAME and
1887 TYPE_TAG_NAME were separate). */
1892 stub_noname_complaint ();
1893 return make_qualified_type (type, instance_flags, NULL);
1895 sym = lookup_symbol (name, 0, STRUCT_DOMAIN, 0);
1898 /* Same as above for opaque types, we can replace the stub
1899 with the complete type only if they are in the same
1901 if (TYPE_OBJFILE (SYMBOL_TYPE(sym)) == TYPE_OBJFILE (type))
1902 type = make_qualified_type (SYMBOL_TYPE (sym),
1903 TYPE_INSTANCE_FLAGS (type),
1906 type = SYMBOL_TYPE (sym);
1910 if (TYPE_TARGET_STUB (type))
1912 struct type *range_type;
1913 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1915 if (TYPE_STUB (target_type) || TYPE_TARGET_STUB (target_type))
1917 /* Nothing we can do. */
1919 else if (TYPE_CODE (type) == TYPE_CODE_RANGE)
1921 TYPE_LENGTH (type) = TYPE_LENGTH (target_type);
1922 TYPE_TARGET_STUB (type) = 0;
1926 type = make_qualified_type (type, instance_flags, NULL);
1928 /* Cache TYPE_LENGTH for future use. */
1929 TYPE_LENGTH (orig_type) = TYPE_LENGTH (type);
1934 /* Parse a type expression in the string [P..P+LENGTH). If an error
1935 occurs, silently return a void type. */
1937 static struct type *
1938 safe_parse_type (struct gdbarch *gdbarch, char *p, int length)
1940 struct ui_file *saved_gdb_stderr;
1941 struct type *type = NULL; /* Initialize to keep gcc happy. */
1942 volatile struct gdb_exception except;
1944 /* Suppress error messages. */
1945 saved_gdb_stderr = gdb_stderr;
1946 gdb_stderr = ui_file_new ();
1948 /* Call parse_and_eval_type() without fear of longjmp()s. */
1949 TRY_CATCH (except, RETURN_MASK_ERROR)
1951 type = parse_and_eval_type (p, length);
1954 if (except.reason < 0)
1955 type = builtin_type (gdbarch)->builtin_void;
1957 /* Stop suppressing error messages. */
1958 ui_file_delete (gdb_stderr);
1959 gdb_stderr = saved_gdb_stderr;
1964 /* Ugly hack to convert method stubs into method types.
1966 He ain't kiddin'. This demangles the name of the method into a
1967 string including argument types, parses out each argument type,
1968 generates a string casting a zero to that type, evaluates the
1969 string, and stuffs the resulting type into an argtype vector!!!
1970 Then it knows the type of the whole function (including argument
1971 types for overloading), which info used to be in the stab's but was
1972 removed to hack back the space required for them. */
1975 check_stub_method (struct type *type, int method_id, int signature_id)
1977 struct gdbarch *gdbarch = get_type_arch (type);
1979 char *mangled_name = gdb_mangle_name (type, method_id, signature_id);
1980 char *demangled_name = gdb_demangle (mangled_name,
1981 DMGL_PARAMS | DMGL_ANSI);
1982 char *argtypetext, *p;
1983 int depth = 0, argcount = 1;
1984 struct field *argtypes;
1987 /* Make sure we got back a function string that we can use. */
1989 p = strchr (demangled_name, '(');
1993 if (demangled_name == NULL || p == NULL)
1994 error (_("Internal: Cannot demangle mangled name `%s'."),
1997 /* Now, read in the parameters that define this type. */
2002 if (*p == '(' || *p == '<')
2006 else if (*p == ')' || *p == '>')
2010 else if (*p == ',' && depth == 0)
2018 /* If we read one argument and it was ``void'', don't count it. */
2019 if (strncmp (argtypetext, "(void)", 6) == 0)
2022 /* We need one extra slot, for the THIS pointer. */
2024 argtypes = (struct field *)
2025 TYPE_ALLOC (type, (argcount + 1) * sizeof (struct field));
2028 /* Add THIS pointer for non-static methods. */
2029 f = TYPE_FN_FIELDLIST1 (type, method_id);
2030 if (TYPE_FN_FIELD_STATIC_P (f, signature_id))
2034 argtypes[0].type = lookup_pointer_type (type);
2038 if (*p != ')') /* () means no args, skip while. */
2043 if (depth <= 0 && (*p == ',' || *p == ')'))
2045 /* Avoid parsing of ellipsis, they will be handled below.
2046 Also avoid ``void'' as above. */
2047 if (strncmp (argtypetext, "...", p - argtypetext) != 0
2048 && strncmp (argtypetext, "void", p - argtypetext) != 0)
2050 argtypes[argcount].type =
2051 safe_parse_type (gdbarch, argtypetext, p - argtypetext);
2054 argtypetext = p + 1;
2057 if (*p == '(' || *p == '<')
2061 else if (*p == ')' || *p == '>')
2070 TYPE_FN_FIELD_PHYSNAME (f, signature_id) = mangled_name;
2072 /* Now update the old "stub" type into a real type. */
2073 mtype = TYPE_FN_FIELD_TYPE (f, signature_id);
2074 TYPE_DOMAIN_TYPE (mtype) = type;
2075 TYPE_FIELDS (mtype) = argtypes;
2076 TYPE_NFIELDS (mtype) = argcount;
2077 TYPE_STUB (mtype) = 0;
2078 TYPE_FN_FIELD_STUB (f, signature_id) = 0;
2080 TYPE_VARARGS (mtype) = 1;
2082 xfree (demangled_name);
2085 /* This is the external interface to check_stub_method, above. This
2086 function unstubs all of the signatures for TYPE's METHOD_ID method
2087 name. After calling this function TYPE_FN_FIELD_STUB will be
2088 cleared for each signature and TYPE_FN_FIELDLIST_NAME will be
2091 This function unfortunately can not die until stabs do. */
2094 check_stub_method_group (struct type *type, int method_id)
2096 int len = TYPE_FN_FIELDLIST_LENGTH (type, method_id);
2097 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
2098 int j, found_stub = 0;
2100 for (j = 0; j < len; j++)
2101 if (TYPE_FN_FIELD_STUB (f, j))
2104 check_stub_method (type, method_id, j);
2107 /* GNU v3 methods with incorrect names were corrected when we read
2108 in type information, because it was cheaper to do it then. The
2109 only GNU v2 methods with incorrect method names are operators and
2110 destructors; destructors were also corrected when we read in type
2113 Therefore the only thing we need to handle here are v2 operator
2115 if (found_stub && strncmp (TYPE_FN_FIELD_PHYSNAME (f, 0), "_Z", 2) != 0)
2118 char dem_opname[256];
2120 ret = cplus_demangle_opname (TYPE_FN_FIELDLIST_NAME (type,
2122 dem_opname, DMGL_ANSI);
2124 ret = cplus_demangle_opname (TYPE_FN_FIELDLIST_NAME (type,
2128 TYPE_FN_FIELDLIST_NAME (type, method_id) = xstrdup (dem_opname);
2132 /* Ensure it is in .rodata (if available) by workarounding GCC PR 44690. */
2133 const struct cplus_struct_type cplus_struct_default = { };
2136 allocate_cplus_struct_type (struct type *type)
2138 if (HAVE_CPLUS_STRUCT (type))
2139 /* Structure was already allocated. Nothing more to do. */
2142 TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_CPLUS_STUFF;
2143 TYPE_RAW_CPLUS_SPECIFIC (type) = (struct cplus_struct_type *)
2144 TYPE_ALLOC (type, sizeof (struct cplus_struct_type));
2145 *(TYPE_RAW_CPLUS_SPECIFIC (type)) = cplus_struct_default;
2148 const struct gnat_aux_type gnat_aux_default =
2151 /* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
2152 and allocate the associated gnat-specific data. The gnat-specific
2153 data is also initialized to gnat_aux_default. */
2156 allocate_gnat_aux_type (struct type *type)
2158 TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_GNAT_STUFF;
2159 TYPE_GNAT_SPECIFIC (type) = (struct gnat_aux_type *)
2160 TYPE_ALLOC (type, sizeof (struct gnat_aux_type));
2161 *(TYPE_GNAT_SPECIFIC (type)) = gnat_aux_default;
2164 /* Helper function to initialize the standard scalar types.
2166 If NAME is non-NULL, then it is used to initialize the type name.
2167 Note that NAME is not copied; it is required to have a lifetime at
2168 least as long as OBJFILE. */
2171 init_type (enum type_code code, int length, int flags,
2172 const char *name, struct objfile *objfile)
2176 type = alloc_type (objfile);
2177 TYPE_CODE (type) = code;
2178 TYPE_LENGTH (type) = length;
2180 gdb_assert (!(flags & (TYPE_FLAG_MIN - 1)));
2181 if (flags & TYPE_FLAG_UNSIGNED)
2182 TYPE_UNSIGNED (type) = 1;
2183 if (flags & TYPE_FLAG_NOSIGN)
2184 TYPE_NOSIGN (type) = 1;
2185 if (flags & TYPE_FLAG_STUB)
2186 TYPE_STUB (type) = 1;
2187 if (flags & TYPE_FLAG_TARGET_STUB)
2188 TYPE_TARGET_STUB (type) = 1;
2189 if (flags & TYPE_FLAG_STATIC)
2190 TYPE_STATIC (type) = 1;
2191 if (flags & TYPE_FLAG_PROTOTYPED)
2192 TYPE_PROTOTYPED (type) = 1;
2193 if (flags & TYPE_FLAG_INCOMPLETE)
2194 TYPE_INCOMPLETE (type) = 1;
2195 if (flags & TYPE_FLAG_VARARGS)
2196 TYPE_VARARGS (type) = 1;
2197 if (flags & TYPE_FLAG_VECTOR)
2198 TYPE_VECTOR (type) = 1;
2199 if (flags & TYPE_FLAG_STUB_SUPPORTED)
2200 TYPE_STUB_SUPPORTED (type) = 1;
2201 if (flags & TYPE_FLAG_FIXED_INSTANCE)
2202 TYPE_FIXED_INSTANCE (type) = 1;
2203 if (flags & TYPE_FLAG_GNU_IFUNC)
2204 TYPE_GNU_IFUNC (type) = 1;
2206 TYPE_NAME (type) = name;
2210 if (name && strcmp (name, "char") == 0)
2211 TYPE_NOSIGN (type) = 1;
2215 case TYPE_CODE_STRUCT:
2216 case TYPE_CODE_UNION:
2217 case TYPE_CODE_NAMESPACE:
2218 INIT_CPLUS_SPECIFIC (type);
2221 TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_FLOATFORMAT;
2223 case TYPE_CODE_FUNC:
2224 INIT_FUNC_SPECIFIC (type);
2230 /* Queries on types. */
2233 can_dereference (struct type *t)
2235 /* FIXME: Should we return true for references as well as
2240 && TYPE_CODE (t) == TYPE_CODE_PTR
2241 && TYPE_CODE (TYPE_TARGET_TYPE (t)) != TYPE_CODE_VOID);
2245 is_integral_type (struct type *t)
2250 && ((TYPE_CODE (t) == TYPE_CODE_INT)
2251 || (TYPE_CODE (t) == TYPE_CODE_ENUM)
2252 || (TYPE_CODE (t) == TYPE_CODE_FLAGS)
2253 || (TYPE_CODE (t) == TYPE_CODE_CHAR)
2254 || (TYPE_CODE (t) == TYPE_CODE_RANGE)
2255 || (TYPE_CODE (t) == TYPE_CODE_BOOL)));
2258 /* Return true if TYPE is scalar. */
2261 is_scalar_type (struct type *type)
2263 CHECK_TYPEDEF (type);
2265 switch (TYPE_CODE (type))
2267 case TYPE_CODE_ARRAY:
2268 case TYPE_CODE_STRUCT:
2269 case TYPE_CODE_UNION:
2271 case TYPE_CODE_STRING:
2278 /* Return true if T is scalar, or a composite type which in practice has
2279 the memory layout of a scalar type. E.g., an array or struct with only
2280 one scalar element inside it, or a union with only scalar elements. */
2283 is_scalar_type_recursive (struct type *t)
2287 if (is_scalar_type (t))
2289 /* Are we dealing with an array or string of known dimensions? */
2290 else if ((TYPE_CODE (t) == TYPE_CODE_ARRAY
2291 || TYPE_CODE (t) == TYPE_CODE_STRING) && TYPE_NFIELDS (t) == 1
2292 && TYPE_CODE (TYPE_INDEX_TYPE (t)) == TYPE_CODE_RANGE)
2294 LONGEST low_bound, high_bound;
2295 struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (t));
2297 get_discrete_bounds (TYPE_INDEX_TYPE (t), &low_bound, &high_bound);
2299 return high_bound == low_bound && is_scalar_type_recursive (elt_type);
2301 /* Are we dealing with a struct with one element? */
2302 else if (TYPE_CODE (t) == TYPE_CODE_STRUCT && TYPE_NFIELDS (t) == 1)
2303 return is_scalar_type_recursive (TYPE_FIELD_TYPE (t, 0));
2304 else if (TYPE_CODE (t) == TYPE_CODE_UNION)
2306 int i, n = TYPE_NFIELDS (t);
2308 /* If all elements of the union are scalar, then the union is scalar. */
2309 for (i = 0; i < n; i++)
2310 if (!is_scalar_type_recursive (TYPE_FIELD_TYPE (t, i)))
2319 /* A helper function which returns true if types A and B represent the
2320 "same" class type. This is true if the types have the same main
2321 type, or the same name. */
2324 class_types_same_p (const struct type *a, const struct type *b)
2326 return (TYPE_MAIN_TYPE (a) == TYPE_MAIN_TYPE (b)
2327 || (TYPE_NAME (a) && TYPE_NAME (b)
2328 && !strcmp (TYPE_NAME (a), TYPE_NAME (b))));
2331 /* If BASE is an ancestor of DCLASS return the distance between them.
2332 otherwise return -1;
2336 class B: public A {};
2337 class C: public B {};
2340 distance_to_ancestor (A, A, 0) = 0
2341 distance_to_ancestor (A, B, 0) = 1
2342 distance_to_ancestor (A, C, 0) = 2
2343 distance_to_ancestor (A, D, 0) = 3
2345 If PUBLIC is 1 then only public ancestors are considered,
2346 and the function returns the distance only if BASE is a public ancestor
2350 distance_to_ancestor (A, D, 1) = -1. */
2353 distance_to_ancestor (struct type *base, struct type *dclass, int public)
2358 CHECK_TYPEDEF (base);
2359 CHECK_TYPEDEF (dclass);
2361 if (class_types_same_p (base, dclass))
2364 for (i = 0; i < TYPE_N_BASECLASSES (dclass); i++)
2366 if (public && ! BASETYPE_VIA_PUBLIC (dclass, i))
2369 d = distance_to_ancestor (base, TYPE_BASECLASS (dclass, i), public);
2377 /* Check whether BASE is an ancestor or base class or DCLASS
2378 Return 1 if so, and 0 if not.
2379 Note: If BASE and DCLASS are of the same type, this function
2380 will return 1. So for some class A, is_ancestor (A, A) will
2384 is_ancestor (struct type *base, struct type *dclass)
2386 return distance_to_ancestor (base, dclass, 0) >= 0;
2389 /* Like is_ancestor, but only returns true when BASE is a public
2390 ancestor of DCLASS. */
2393 is_public_ancestor (struct type *base, struct type *dclass)
2395 return distance_to_ancestor (base, dclass, 1) >= 0;
2398 /* A helper function for is_unique_ancestor. */
2401 is_unique_ancestor_worker (struct type *base, struct type *dclass,
2403 const gdb_byte *valaddr, int embedded_offset,
2404 CORE_ADDR address, struct value *val)
2408 CHECK_TYPEDEF (base);
2409 CHECK_TYPEDEF (dclass);
2411 for (i = 0; i < TYPE_N_BASECLASSES (dclass) && count < 2; ++i)
2416 iter = check_typedef (TYPE_BASECLASS (dclass, i));
2418 this_offset = baseclass_offset (dclass, i, valaddr, embedded_offset,
2421 if (class_types_same_p (base, iter))
2423 /* If this is the first subclass, set *OFFSET and set count
2424 to 1. Otherwise, if this is at the same offset as
2425 previous instances, do nothing. Otherwise, increment
2429 *offset = this_offset;
2432 else if (this_offset == *offset)
2440 count += is_unique_ancestor_worker (base, iter, offset,
2442 embedded_offset + this_offset,
2449 /* Like is_ancestor, but only returns true if BASE is a unique base
2450 class of the type of VAL. */
2453 is_unique_ancestor (struct type *base, struct value *val)
2457 return is_unique_ancestor_worker (base, value_type (val), &offset,
2458 value_contents_for_printing (val),
2459 value_embedded_offset (val),
2460 value_address (val), val) == 1;
2464 /* Overload resolution. */
2466 /* Return the sum of the rank of A with the rank of B. */
2469 sum_ranks (struct rank a, struct rank b)
2472 c.rank = a.rank + b.rank;
2473 c.subrank = a.subrank + b.subrank;
2477 /* Compare rank A and B and return:
2479 1 if a is better than b
2480 -1 if b is better than a. */
2483 compare_ranks (struct rank a, struct rank b)
2485 if (a.rank == b.rank)
2487 if (a.subrank == b.subrank)
2489 if (a.subrank < b.subrank)
2491 if (a.subrank > b.subrank)
2495 if (a.rank < b.rank)
2498 /* a.rank > b.rank */
2502 /* Functions for overload resolution begin here. */
2504 /* Compare two badness vectors A and B and return the result.
2505 0 => A and B are identical
2506 1 => A and B are incomparable
2507 2 => A is better than B
2508 3 => A is worse than B */
2511 compare_badness (struct badness_vector *a, struct badness_vector *b)
2515 short found_pos = 0; /* any positives in c? */
2516 short found_neg = 0; /* any negatives in c? */
2518 /* differing lengths => incomparable */
2519 if (a->length != b->length)
2522 /* Subtract b from a */
2523 for (i = 0; i < a->length; i++)
2525 tmp = compare_ranks (b->rank[i], a->rank[i]);
2535 return 1; /* incomparable */
2537 return 3; /* A > B */
2543 return 2; /* A < B */
2545 return 0; /* A == B */
2549 /* Rank a function by comparing its parameter types (PARMS, length
2550 NPARMS), to the types of an argument list (ARGS, length NARGS).
2551 Return a pointer to a badness vector. This has NARGS + 1
2554 struct badness_vector *
2555 rank_function (struct type **parms, int nparms,
2556 struct value **args, int nargs)
2559 struct badness_vector *bv;
2560 int min_len = nparms < nargs ? nparms : nargs;
2562 bv = xmalloc (sizeof (struct badness_vector));
2563 bv->length = nargs + 1; /* add 1 for the length-match rank. */
2564 bv->rank = xmalloc ((nargs + 1) * sizeof (int));
2566 /* First compare the lengths of the supplied lists.
2567 If there is a mismatch, set it to a high value. */
2569 /* pai/1997-06-03 FIXME: when we have debug info about default
2570 arguments and ellipsis parameter lists, we should consider those
2571 and rank the length-match more finely. */
2573 LENGTH_MATCH (bv) = (nargs != nparms)
2574 ? LENGTH_MISMATCH_BADNESS
2575 : EXACT_MATCH_BADNESS;
2577 /* Now rank all the parameters of the candidate function. */
2578 for (i = 1; i <= min_len; i++)
2579 bv->rank[i] = rank_one_type (parms[i - 1], value_type (args[i - 1]),
2582 /* If more arguments than parameters, add dummy entries. */
2583 for (i = min_len + 1; i <= nargs; i++)
2584 bv->rank[i] = TOO_FEW_PARAMS_BADNESS;
2589 /* Compare the names of two integer types, assuming that any sign
2590 qualifiers have been checked already. We do it this way because
2591 there may be an "int" in the name of one of the types. */
2594 integer_types_same_name_p (const char *first, const char *second)
2596 int first_p, second_p;
2598 /* If both are shorts, return 1; if neither is a short, keep
2600 first_p = (strstr (first, "short") != NULL);
2601 second_p = (strstr (second, "short") != NULL);
2602 if (first_p && second_p)
2604 if (first_p || second_p)
2607 /* Likewise for long. */
2608 first_p = (strstr (first, "long") != NULL);
2609 second_p = (strstr (second, "long") != NULL);
2610 if (first_p && second_p)
2612 if (first_p || second_p)
2615 /* Likewise for char. */
2616 first_p = (strstr (first, "char") != NULL);
2617 second_p = (strstr (second, "char") != NULL);
2618 if (first_p && second_p)
2620 if (first_p || second_p)
2623 /* They must both be ints. */
2627 /* Compares type A to type B returns 1 if the represent the same type
2631 types_equal (struct type *a, struct type *b)
2633 /* Identical type pointers. */
2634 /* However, this still doesn't catch all cases of same type for b
2635 and a. The reason is that builtin types are different from
2636 the same ones constructed from the object. */
2640 /* Resolve typedefs */
2641 if (TYPE_CODE (a) == TYPE_CODE_TYPEDEF)
2642 a = check_typedef (a);
2643 if (TYPE_CODE (b) == TYPE_CODE_TYPEDEF)
2644 b = check_typedef (b);
2646 /* If after resolving typedefs a and b are not of the same type
2647 code then they are not equal. */
2648 if (TYPE_CODE (a) != TYPE_CODE (b))
2651 /* If a and b are both pointers types or both reference types then
2652 they are equal of the same type iff the objects they refer to are
2653 of the same type. */
2654 if (TYPE_CODE (a) == TYPE_CODE_PTR
2655 || TYPE_CODE (a) == TYPE_CODE_REF)
2656 return types_equal (TYPE_TARGET_TYPE (a),
2657 TYPE_TARGET_TYPE (b));
2659 /* Well, damnit, if the names are exactly the same, I'll say they
2660 are exactly the same. This happens when we generate method
2661 stubs. The types won't point to the same address, but they
2662 really are the same. */
2664 if (TYPE_NAME (a) && TYPE_NAME (b)
2665 && strcmp (TYPE_NAME (a), TYPE_NAME (b)) == 0)
2668 /* Check if identical after resolving typedefs. */
2672 /* Two function types are equal if their argument and return types
2674 if (TYPE_CODE (a) == TYPE_CODE_FUNC)
2678 if (TYPE_NFIELDS (a) != TYPE_NFIELDS (b))
2681 if (!types_equal (TYPE_TARGET_TYPE (a), TYPE_TARGET_TYPE (b)))
2684 for (i = 0; i < TYPE_NFIELDS (a); ++i)
2685 if (!types_equal (TYPE_FIELD_TYPE (a, i), TYPE_FIELD_TYPE (b, i)))
2694 /* Deep comparison of types. */
2696 /* An entry in the type-equality bcache. */
2698 typedef struct type_equality_entry
2700 struct type *type1, *type2;
2701 } type_equality_entry_d;
2703 DEF_VEC_O (type_equality_entry_d);
2705 /* A helper function to compare two strings. Returns 1 if they are
2706 the same, 0 otherwise. Handles NULLs properly. */
2709 compare_maybe_null_strings (const char *s, const char *t)
2711 if (s == NULL && t != NULL)
2713 else if (s != NULL && t == NULL)
2715 else if (s == NULL && t== NULL)
2717 return strcmp (s, t) == 0;
2720 /* A helper function for check_types_worklist that checks two types for
2721 "deep" equality. Returns non-zero if the types are considered the
2722 same, zero otherwise. */
2725 check_types_equal (struct type *type1, struct type *type2,
2726 VEC (type_equality_entry_d) **worklist)
2728 CHECK_TYPEDEF (type1);
2729 CHECK_TYPEDEF (type2);
2734 if (TYPE_CODE (type1) != TYPE_CODE (type2)
2735 || TYPE_LENGTH (type1) != TYPE_LENGTH (type2)
2736 || TYPE_UNSIGNED (type1) != TYPE_UNSIGNED (type2)
2737 || TYPE_NOSIGN (type1) != TYPE_NOSIGN (type2)
2738 || TYPE_VARARGS (type1) != TYPE_VARARGS (type2)
2739 || TYPE_VECTOR (type1) != TYPE_VECTOR (type2)
2740 || TYPE_NOTTEXT (type1) != TYPE_NOTTEXT (type2)
2741 || TYPE_INSTANCE_FLAGS (type1) != TYPE_INSTANCE_FLAGS (type2)
2742 || TYPE_NFIELDS (type1) != TYPE_NFIELDS (type2))
2745 if (!compare_maybe_null_strings (TYPE_TAG_NAME (type1),
2746 TYPE_TAG_NAME (type2)))
2748 if (!compare_maybe_null_strings (TYPE_NAME (type1), TYPE_NAME (type2)))
2751 if (TYPE_CODE (type1) == TYPE_CODE_RANGE)
2753 if (memcmp (TYPE_RANGE_DATA (type1), TYPE_RANGE_DATA (type2),
2754 sizeof (*TYPE_RANGE_DATA (type1))) != 0)
2761 for (i = 0; i < TYPE_NFIELDS (type1); ++i)
2763 const struct field *field1 = &TYPE_FIELD (type1, i);
2764 const struct field *field2 = &TYPE_FIELD (type2, i);
2765 struct type_equality_entry entry;
2767 if (FIELD_ARTIFICIAL (*field1) != FIELD_ARTIFICIAL (*field2)
2768 || FIELD_BITSIZE (*field1) != FIELD_BITSIZE (*field2)
2769 || FIELD_LOC_KIND (*field1) != FIELD_LOC_KIND (*field2))
2771 if (!compare_maybe_null_strings (FIELD_NAME (*field1),
2772 FIELD_NAME (*field2)))
2774 switch (FIELD_LOC_KIND (*field1))
2776 case FIELD_LOC_KIND_BITPOS:
2777 if (FIELD_BITPOS (*field1) != FIELD_BITPOS (*field2))
2780 case FIELD_LOC_KIND_ENUMVAL:
2781 if (FIELD_ENUMVAL (*field1) != FIELD_ENUMVAL (*field2))
2784 case FIELD_LOC_KIND_PHYSADDR:
2785 if (FIELD_STATIC_PHYSADDR (*field1)
2786 != FIELD_STATIC_PHYSADDR (*field2))
2789 case FIELD_LOC_KIND_PHYSNAME:
2790 if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1),
2791 FIELD_STATIC_PHYSNAME (*field2)))
2794 case FIELD_LOC_KIND_DWARF_BLOCK:
2796 struct dwarf2_locexpr_baton *block1, *block2;
2798 block1 = FIELD_DWARF_BLOCK (*field1);
2799 block2 = FIELD_DWARF_BLOCK (*field2);
2800 if (block1->per_cu != block2->per_cu
2801 || block1->size != block2->size
2802 || memcmp (block1->data, block2->data, block1->size) != 0)
2807 internal_error (__FILE__, __LINE__, _("Unsupported field kind "
2808 "%d by check_types_equal"),
2809 FIELD_LOC_KIND (*field1));
2812 entry.type1 = FIELD_TYPE (*field1);
2813 entry.type2 = FIELD_TYPE (*field2);
2814 VEC_safe_push (type_equality_entry_d, *worklist, &entry);
2818 if (TYPE_TARGET_TYPE (type1) != NULL)
2820 struct type_equality_entry entry;
2822 if (TYPE_TARGET_TYPE (type2) == NULL)
2825 entry.type1 = TYPE_TARGET_TYPE (type1);
2826 entry.type2 = TYPE_TARGET_TYPE (type2);
2827 VEC_safe_push (type_equality_entry_d, *worklist, &entry);
2829 else if (TYPE_TARGET_TYPE (type2) != NULL)
2835 /* Check types on a worklist for equality. Returns zero if any pair
2836 is not equal, non-zero if they are all considered equal. */
2839 check_types_worklist (VEC (type_equality_entry_d) **worklist,
2840 struct bcache *cache)
2842 while (!VEC_empty (type_equality_entry_d, *worklist))
2844 struct type_equality_entry entry;
2847 entry = *VEC_last (type_equality_entry_d, *worklist);
2848 VEC_pop (type_equality_entry_d, *worklist);
2850 /* If the type pair has already been visited, we know it is
2852 bcache_full (&entry, sizeof (entry), cache, &added);
2856 if (check_types_equal (entry.type1, entry.type2, worklist) == 0)
2863 /* Return non-zero if types TYPE1 and TYPE2 are equal, as determined by a
2864 "deep comparison". Otherwise return zero. */
2867 types_deeply_equal (struct type *type1, struct type *type2)
2869 volatile struct gdb_exception except;
2871 struct bcache *cache;
2872 VEC (type_equality_entry_d) *worklist = NULL;
2873 struct type_equality_entry entry;
2875 gdb_assert (type1 != NULL && type2 != NULL);
2877 /* Early exit for the simple case. */
2881 cache = bcache_xmalloc (NULL, NULL);
2883 entry.type1 = type1;
2884 entry.type2 = type2;
2885 VEC_safe_push (type_equality_entry_d, worklist, &entry);
2887 TRY_CATCH (except, RETURN_MASK_ALL)
2889 result = check_types_worklist (&worklist, cache);
2891 /* check_types_worklist calls several nested helper functions,
2892 some of which can raise a GDB Exception, so we just check
2893 and rethrow here. If there is a GDB exception, a comparison
2894 is not capable (or trusted), so exit. */
2895 bcache_xfree (cache);
2896 VEC_free (type_equality_entry_d, worklist);
2897 /* Rethrow if there was a problem. */
2898 if (except.reason < 0)
2899 throw_exception (except);
2904 /* Compare one type (PARM) for compatibility with another (ARG).
2905 * PARM is intended to be the parameter type of a function; and
2906 * ARG is the supplied argument's type. This function tests if
2907 * the latter can be converted to the former.
2908 * VALUE is the argument's value or NULL if none (or called recursively)
2910 * Return 0 if they are identical types;
2911 * Otherwise, return an integer which corresponds to how compatible
2912 * PARM is to ARG. The higher the return value, the worse the match.
2913 * Generally the "bad" conversions are all uniformly assigned a 100. */
2916 rank_one_type (struct type *parm, struct type *arg, struct value *value)
2918 struct rank rank = {0,0};
2920 if (types_equal (parm, arg))
2921 return EXACT_MATCH_BADNESS;
2923 /* Resolve typedefs */
2924 if (TYPE_CODE (parm) == TYPE_CODE_TYPEDEF)
2925 parm = check_typedef (parm);
2926 if (TYPE_CODE (arg) == TYPE_CODE_TYPEDEF)
2927 arg = check_typedef (arg);
2929 /* See through references, since we can almost make non-references
2931 if (TYPE_CODE (arg) == TYPE_CODE_REF)
2932 return (sum_ranks (rank_one_type (parm, TYPE_TARGET_TYPE (arg), NULL),
2933 REFERENCE_CONVERSION_BADNESS));
2934 if (TYPE_CODE (parm) == TYPE_CODE_REF)
2935 return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm), arg, NULL),
2936 REFERENCE_CONVERSION_BADNESS));
2938 /* Debugging only. */
2939 fprintf_filtered (gdb_stderr,
2940 "------ Arg is %s [%d], parm is %s [%d]\n",
2941 TYPE_NAME (arg), TYPE_CODE (arg),
2942 TYPE_NAME (parm), TYPE_CODE (parm));
2944 /* x -> y means arg of type x being supplied for parameter of type y. */
2946 switch (TYPE_CODE (parm))
2949 switch (TYPE_CODE (arg))
2953 /* Allowed pointer conversions are:
2954 (a) pointer to void-pointer conversion. */
2955 if (TYPE_CODE (TYPE_TARGET_TYPE (parm)) == TYPE_CODE_VOID)
2956 return VOID_PTR_CONVERSION_BADNESS;
2958 /* (b) pointer to ancestor-pointer conversion. */
2959 rank.subrank = distance_to_ancestor (TYPE_TARGET_TYPE (parm),
2960 TYPE_TARGET_TYPE (arg),
2962 if (rank.subrank >= 0)
2963 return sum_ranks (BASE_PTR_CONVERSION_BADNESS, rank);
2965 return INCOMPATIBLE_TYPE_BADNESS;
2966 case TYPE_CODE_ARRAY:
2967 if (types_equal (TYPE_TARGET_TYPE (parm),
2968 TYPE_TARGET_TYPE (arg)))
2969 return EXACT_MATCH_BADNESS;
2970 return INCOMPATIBLE_TYPE_BADNESS;
2971 case TYPE_CODE_FUNC:
2972 return rank_one_type (TYPE_TARGET_TYPE (parm), arg, NULL);
2974 if (value != NULL && TYPE_CODE (value_type (value)) == TYPE_CODE_INT)
2976 if (value_as_long (value) == 0)
2978 /* Null pointer conversion: allow it to be cast to a pointer.
2979 [4.10.1 of C++ standard draft n3290] */
2980 return NULL_POINTER_CONVERSION_BADNESS;
2984 /* If type checking is disabled, allow the conversion. */
2985 if (!strict_type_checking)
2986 return NS_INTEGER_POINTER_CONVERSION_BADNESS;
2990 case TYPE_CODE_ENUM:
2991 case TYPE_CODE_FLAGS:
2992 case TYPE_CODE_CHAR:
2993 case TYPE_CODE_RANGE:
2994 case TYPE_CODE_BOOL:
2996 return INCOMPATIBLE_TYPE_BADNESS;
2998 case TYPE_CODE_ARRAY:
2999 switch (TYPE_CODE (arg))
3002 case TYPE_CODE_ARRAY:
3003 return rank_one_type (TYPE_TARGET_TYPE (parm),
3004 TYPE_TARGET_TYPE (arg), NULL);
3006 return INCOMPATIBLE_TYPE_BADNESS;
3008 case TYPE_CODE_FUNC:
3009 switch (TYPE_CODE (arg))
3011 case TYPE_CODE_PTR: /* funcptr -> func */
3012 return rank_one_type (parm, TYPE_TARGET_TYPE (arg), NULL);
3014 return INCOMPATIBLE_TYPE_BADNESS;
3017 switch (TYPE_CODE (arg))
3020 if (TYPE_LENGTH (arg) == TYPE_LENGTH (parm))
3022 /* Deal with signed, unsigned, and plain chars and
3023 signed and unsigned ints. */
3024 if (TYPE_NOSIGN (parm))
3026 /* This case only for character types. */
3027 if (TYPE_NOSIGN (arg))
3028 return EXACT_MATCH_BADNESS; /* plain char -> plain char */
3029 else /* signed/unsigned char -> plain char */
3030 return INTEGER_CONVERSION_BADNESS;
3032 else if (TYPE_UNSIGNED (parm))
3034 if (TYPE_UNSIGNED (arg))
3036 /* unsigned int -> unsigned int, or
3037 unsigned long -> unsigned long */
3038 if (integer_types_same_name_p (TYPE_NAME (parm),
3040 return EXACT_MATCH_BADNESS;
3041 else if (integer_types_same_name_p (TYPE_NAME (arg),
3043 && integer_types_same_name_p (TYPE_NAME (parm),
3045 /* unsigned int -> unsigned long */
3046 return INTEGER_PROMOTION_BADNESS;
3048 /* unsigned long -> unsigned int */
3049 return INTEGER_CONVERSION_BADNESS;
3053 if (integer_types_same_name_p (TYPE_NAME (arg),
3055 && integer_types_same_name_p (TYPE_NAME (parm),
3057 /* signed long -> unsigned int */
3058 return INTEGER_CONVERSION_BADNESS;
3060 /* signed int/long -> unsigned int/long */
3061 return INTEGER_CONVERSION_BADNESS;
3064 else if (!TYPE_NOSIGN (arg) && !TYPE_UNSIGNED (arg))
3066 if (integer_types_same_name_p (TYPE_NAME (parm),
3068 return EXACT_MATCH_BADNESS;
3069 else if (integer_types_same_name_p (TYPE_NAME (arg),
3071 && integer_types_same_name_p (TYPE_NAME (parm),
3073 return INTEGER_PROMOTION_BADNESS;
3075 return INTEGER_CONVERSION_BADNESS;
3078 return INTEGER_CONVERSION_BADNESS;
3080 else if (TYPE_LENGTH (arg) < TYPE_LENGTH (parm))
3081 return INTEGER_PROMOTION_BADNESS;
3083 return INTEGER_CONVERSION_BADNESS;
3084 case TYPE_CODE_ENUM:
3085 case TYPE_CODE_FLAGS:
3086 case TYPE_CODE_CHAR:
3087 case TYPE_CODE_RANGE:
3088 case TYPE_CODE_BOOL:
3089 if (TYPE_DECLARED_CLASS (arg))
3090 return INCOMPATIBLE_TYPE_BADNESS;
3091 return INTEGER_PROMOTION_BADNESS;
3093 return INT_FLOAT_CONVERSION_BADNESS;
3095 return NS_POINTER_CONVERSION_BADNESS;
3097 return INCOMPATIBLE_TYPE_BADNESS;
3100 case TYPE_CODE_ENUM:
3101 switch (TYPE_CODE (arg))
3104 case TYPE_CODE_CHAR:
3105 case TYPE_CODE_RANGE:
3106 case TYPE_CODE_BOOL:
3107 case TYPE_CODE_ENUM:
3108 if (TYPE_DECLARED_CLASS (parm) || TYPE_DECLARED_CLASS (arg))
3109 return INCOMPATIBLE_TYPE_BADNESS;
3110 return INTEGER_CONVERSION_BADNESS;
3112 return INT_FLOAT_CONVERSION_BADNESS;
3114 return INCOMPATIBLE_TYPE_BADNESS;
3117 case TYPE_CODE_CHAR:
3118 switch (TYPE_CODE (arg))
3120 case TYPE_CODE_RANGE:
3121 case TYPE_CODE_BOOL:
3122 case TYPE_CODE_ENUM:
3123 if (TYPE_DECLARED_CLASS (arg))
3124 return INCOMPATIBLE_TYPE_BADNESS;
3125 return INTEGER_CONVERSION_BADNESS;
3127 return INT_FLOAT_CONVERSION_BADNESS;
3129 if (TYPE_LENGTH (arg) > TYPE_LENGTH (parm))
3130 return INTEGER_CONVERSION_BADNESS;
3131 else if (TYPE_LENGTH (arg) < TYPE_LENGTH (parm))
3132 return INTEGER_PROMOTION_BADNESS;
3133 /* >>> !! else fall through !! <<< */
3134 case TYPE_CODE_CHAR:
3135 /* Deal with signed, unsigned, and plain chars for C++ and
3136 with int cases falling through from previous case. */
3137 if (TYPE_NOSIGN (parm))
3139 if (TYPE_NOSIGN (arg))
3140 return EXACT_MATCH_BADNESS;
3142 return INTEGER_CONVERSION_BADNESS;
3144 else if (TYPE_UNSIGNED (parm))
3146 if (TYPE_UNSIGNED (arg))
3147 return EXACT_MATCH_BADNESS;
3149 return INTEGER_PROMOTION_BADNESS;
3151 else if (!TYPE_NOSIGN (arg) && !TYPE_UNSIGNED (arg))
3152 return EXACT_MATCH_BADNESS;
3154 return INTEGER_CONVERSION_BADNESS;
3156 return INCOMPATIBLE_TYPE_BADNESS;
3159 case TYPE_CODE_RANGE:
3160 switch (TYPE_CODE (arg))
3163 case TYPE_CODE_CHAR:
3164 case TYPE_CODE_RANGE:
3165 case TYPE_CODE_BOOL:
3166 case TYPE_CODE_ENUM:
3167 return INTEGER_CONVERSION_BADNESS;
3169 return INT_FLOAT_CONVERSION_BADNESS;
3171 return INCOMPATIBLE_TYPE_BADNESS;
3174 case TYPE_CODE_BOOL:
3175 switch (TYPE_CODE (arg))
3177 /* n3290 draft, section 4.12.1 (conv.bool):
3179 "A prvalue of arithmetic, unscoped enumeration, pointer, or
3180 pointer to member type can be converted to a prvalue of type
3181 bool. A zero value, null pointer value, or null member pointer
3182 value is converted to false; any other value is converted to
3183 true. A prvalue of type std::nullptr_t can be converted to a
3184 prvalue of type bool; the resulting value is false." */
3186 case TYPE_CODE_CHAR:
3187 case TYPE_CODE_ENUM:
3189 case TYPE_CODE_MEMBERPTR:
3191 return BOOL_CONVERSION_BADNESS;
3192 case TYPE_CODE_RANGE:
3193 return INCOMPATIBLE_TYPE_BADNESS;
3194 case TYPE_CODE_BOOL:
3195 return EXACT_MATCH_BADNESS;
3197 return INCOMPATIBLE_TYPE_BADNESS;
3201 switch (TYPE_CODE (arg))
3204 if (TYPE_LENGTH (arg) < TYPE_LENGTH (parm))
3205 return FLOAT_PROMOTION_BADNESS;
3206 else if (TYPE_LENGTH (arg) == TYPE_LENGTH (parm))
3207 return EXACT_MATCH_BADNESS;
3209 return FLOAT_CONVERSION_BADNESS;
3211 case TYPE_CODE_BOOL:
3212 case TYPE_CODE_ENUM:
3213 case TYPE_CODE_RANGE:
3214 case TYPE_CODE_CHAR:
3215 return INT_FLOAT_CONVERSION_BADNESS;
3217 return INCOMPATIBLE_TYPE_BADNESS;
3220 case TYPE_CODE_COMPLEX:
3221 switch (TYPE_CODE (arg))
3222 { /* Strictly not needed for C++, but... */
3224 return FLOAT_PROMOTION_BADNESS;
3225 case TYPE_CODE_COMPLEX:
3226 return EXACT_MATCH_BADNESS;
3228 return INCOMPATIBLE_TYPE_BADNESS;
3231 case TYPE_CODE_STRUCT:
3232 /* currently same as TYPE_CODE_CLASS. */
3233 switch (TYPE_CODE (arg))
3235 case TYPE_CODE_STRUCT:
3236 /* Check for derivation */
3237 rank.subrank = distance_to_ancestor (parm, arg, 0);
3238 if (rank.subrank >= 0)
3239 return sum_ranks (BASE_CONVERSION_BADNESS, rank);
3240 /* else fall through */
3242 return INCOMPATIBLE_TYPE_BADNESS;
3245 case TYPE_CODE_UNION:
3246 switch (TYPE_CODE (arg))
3248 case TYPE_CODE_UNION:
3250 return INCOMPATIBLE_TYPE_BADNESS;
3253 case TYPE_CODE_MEMBERPTR:
3254 switch (TYPE_CODE (arg))
3257 return INCOMPATIBLE_TYPE_BADNESS;
3260 case TYPE_CODE_METHOD:
3261 switch (TYPE_CODE (arg))
3265 return INCOMPATIBLE_TYPE_BADNESS;
3269 switch (TYPE_CODE (arg))
3273 return INCOMPATIBLE_TYPE_BADNESS;
3278 switch (TYPE_CODE (arg))
3282 return rank_one_type (TYPE_FIELD_TYPE (parm, 0),
3283 TYPE_FIELD_TYPE (arg, 0), NULL);
3285 return INCOMPATIBLE_TYPE_BADNESS;
3288 case TYPE_CODE_VOID:
3290 return INCOMPATIBLE_TYPE_BADNESS;
3291 } /* switch (TYPE_CODE (arg)) */
3294 /* End of functions for overload resolution. */
3296 /* Routines to pretty-print types. */
3299 print_bit_vector (B_TYPE *bits, int nbits)
3303 for (bitno = 0; bitno < nbits; bitno++)
3305 if ((bitno % 8) == 0)
3307 puts_filtered (" ");
3309 if (B_TST (bits, bitno))
3310 printf_filtered (("1"));
3312 printf_filtered (("0"));
3316 /* Note the first arg should be the "this" pointer, we may not want to
3317 include it since we may get into a infinitely recursive
3321 print_arg_types (struct field *args, int nargs, int spaces)
3327 for (i = 0; i < nargs; i++)
3328 recursive_dump_type (args[i].type, spaces + 2);
3333 field_is_static (struct field *f)
3335 /* "static" fields are the fields whose location is not relative
3336 to the address of the enclosing struct. It would be nice to
3337 have a dedicated flag that would be set for static fields when
3338 the type is being created. But in practice, checking the field
3339 loc_kind should give us an accurate answer. */
3340 return (FIELD_LOC_KIND (*f) == FIELD_LOC_KIND_PHYSNAME
3341 || FIELD_LOC_KIND (*f) == FIELD_LOC_KIND_PHYSADDR);
3345 dump_fn_fieldlists (struct type *type, int spaces)
3351 printfi_filtered (spaces, "fn_fieldlists ");
3352 gdb_print_host_address (TYPE_FN_FIELDLISTS (type), gdb_stdout);
3353 printf_filtered ("\n");
3354 for (method_idx = 0; method_idx < TYPE_NFN_FIELDS (type); method_idx++)
3356 f = TYPE_FN_FIELDLIST1 (type, method_idx);
3357 printfi_filtered (spaces + 2, "[%d] name '%s' (",
3359 TYPE_FN_FIELDLIST_NAME (type, method_idx));
3360 gdb_print_host_address (TYPE_FN_FIELDLIST_NAME (type, method_idx),
3362 printf_filtered (_(") length %d\n"),
3363 TYPE_FN_FIELDLIST_LENGTH (type, method_idx));
3364 for (overload_idx = 0;
3365 overload_idx < TYPE_FN_FIELDLIST_LENGTH (type, method_idx);
3368 printfi_filtered (spaces + 4, "[%d] physname '%s' (",
3370 TYPE_FN_FIELD_PHYSNAME (f, overload_idx));
3371 gdb_print_host_address (TYPE_FN_FIELD_PHYSNAME (f, overload_idx),
3373 printf_filtered (")\n");
3374 printfi_filtered (spaces + 8, "type ");
3375 gdb_print_host_address (TYPE_FN_FIELD_TYPE (f, overload_idx),
3377 printf_filtered ("\n");
3379 recursive_dump_type (TYPE_FN_FIELD_TYPE (f, overload_idx),
3382 printfi_filtered (spaces + 8, "args ");
3383 gdb_print_host_address (TYPE_FN_FIELD_ARGS (f, overload_idx),
3385 printf_filtered ("\n");
3387 print_arg_types (TYPE_FN_FIELD_ARGS (f, overload_idx),
3388 TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f,
3391 printfi_filtered (spaces + 8, "fcontext ");
3392 gdb_print_host_address (TYPE_FN_FIELD_FCONTEXT (f, overload_idx),
3394 printf_filtered ("\n");
3396 printfi_filtered (spaces + 8, "is_const %d\n",
3397 TYPE_FN_FIELD_CONST (f, overload_idx));
3398 printfi_filtered (spaces + 8, "is_volatile %d\n",
3399 TYPE_FN_FIELD_VOLATILE (f, overload_idx));
3400 printfi_filtered (spaces + 8, "is_private %d\n",
3401 TYPE_FN_FIELD_PRIVATE (f, overload_idx));
3402 printfi_filtered (spaces + 8, "is_protected %d\n",
3403 TYPE_FN_FIELD_PROTECTED (f, overload_idx));
3404 printfi_filtered (spaces + 8, "is_stub %d\n",
3405 TYPE_FN_FIELD_STUB (f, overload_idx));
3406 printfi_filtered (spaces + 8, "voffset %u\n",
3407 TYPE_FN_FIELD_VOFFSET (f, overload_idx));
3413 print_cplus_stuff (struct type *type, int spaces)
3415 printfi_filtered (spaces, "n_baseclasses %d\n",
3416 TYPE_N_BASECLASSES (type));
3417 printfi_filtered (spaces, "nfn_fields %d\n",
3418 TYPE_NFN_FIELDS (type));
3419 if (TYPE_N_BASECLASSES (type) > 0)
3421 printfi_filtered (spaces, "virtual_field_bits (%d bits at *",
3422 TYPE_N_BASECLASSES (type));
3423 gdb_print_host_address (TYPE_FIELD_VIRTUAL_BITS (type),
3425 printf_filtered (")");
3427 print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type),
3428 TYPE_N_BASECLASSES (type));
3429 puts_filtered ("\n");
3431 if (TYPE_NFIELDS (type) > 0)
3433 if (TYPE_FIELD_PRIVATE_BITS (type) != NULL)
3435 printfi_filtered (spaces,
3436 "private_field_bits (%d bits at *",
3437 TYPE_NFIELDS (type));
3438 gdb_print_host_address (TYPE_FIELD_PRIVATE_BITS (type),
3440 printf_filtered (")");
3441 print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type),
3442 TYPE_NFIELDS (type));
3443 puts_filtered ("\n");
3445 if (TYPE_FIELD_PROTECTED_BITS (type) != NULL)
3447 printfi_filtered (spaces,
3448 "protected_field_bits (%d bits at *",
3449 TYPE_NFIELDS (type));
3450 gdb_print_host_address (TYPE_FIELD_PROTECTED_BITS (type),
3452 printf_filtered (")");
3453 print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type),
3454 TYPE_NFIELDS (type));
3455 puts_filtered ("\n");
3458 if (TYPE_NFN_FIELDS (type) > 0)
3460 dump_fn_fieldlists (type, spaces);
3464 /* Print the contents of the TYPE's type_specific union, assuming that
3465 its type-specific kind is TYPE_SPECIFIC_GNAT_STUFF. */
3468 print_gnat_stuff (struct type *type, int spaces)
3470 struct type *descriptive_type = TYPE_DESCRIPTIVE_TYPE (type);
3472 recursive_dump_type (descriptive_type, spaces + 2);
3475 static struct obstack dont_print_type_obstack;
3478 recursive_dump_type (struct type *type, int spaces)
3483 obstack_begin (&dont_print_type_obstack, 0);
3485 if (TYPE_NFIELDS (type) > 0
3486 || (HAVE_CPLUS_STRUCT (type) && TYPE_NFN_FIELDS (type) > 0))
3488 struct type **first_dont_print
3489 = (struct type **) obstack_base (&dont_print_type_obstack);
3491 int i = (struct type **)
3492 obstack_next_free (&dont_print_type_obstack) - first_dont_print;
3496 if (type == first_dont_print[i])
3498 printfi_filtered (spaces, "type node ");
3499 gdb_print_host_address (type, gdb_stdout);
3500 printf_filtered (_(" <same as already seen type>\n"));
3505 obstack_ptr_grow (&dont_print_type_obstack, type);
3508 printfi_filtered (spaces, "type node ");
3509 gdb_print_host_address (type, gdb_stdout);
3510 printf_filtered ("\n");
3511 printfi_filtered (spaces, "name '%s' (",
3512 TYPE_NAME (type) ? TYPE_NAME (type) : "<NULL>");
3513 gdb_print_host_address (TYPE_NAME (type), gdb_stdout);
3514 printf_filtered (")\n");
3515 printfi_filtered (spaces, "tagname '%s' (",
3516 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : "<NULL>");
3517 gdb_print_host_address (TYPE_TAG_NAME (type), gdb_stdout);
3518 printf_filtered (")\n");
3519 printfi_filtered (spaces, "code 0x%x ", TYPE_CODE (type));
3520 switch (TYPE_CODE (type))
3522 case TYPE_CODE_UNDEF:
3523 printf_filtered ("(TYPE_CODE_UNDEF)");
3526 printf_filtered ("(TYPE_CODE_PTR)");
3528 case TYPE_CODE_ARRAY:
3529 printf_filtered ("(TYPE_CODE_ARRAY)");
3531 case TYPE_CODE_STRUCT:
3532 printf_filtered ("(TYPE_CODE_STRUCT)");
3534 case TYPE_CODE_UNION:
3535 printf_filtered ("(TYPE_CODE_UNION)");
3537 case TYPE_CODE_ENUM:
3538 printf_filtered ("(TYPE_CODE_ENUM)");
3540 case TYPE_CODE_FLAGS:
3541 printf_filtered ("(TYPE_CODE_FLAGS)");
3543 case TYPE_CODE_FUNC:
3544 printf_filtered ("(TYPE_CODE_FUNC)");
3547 printf_filtered ("(TYPE_CODE_INT)");
3550 printf_filtered ("(TYPE_CODE_FLT)");
3552 case TYPE_CODE_VOID:
3553 printf_filtered ("(TYPE_CODE_VOID)");
3556 printf_filtered ("(TYPE_CODE_SET)");
3558 case TYPE_CODE_RANGE:
3559 printf_filtered ("(TYPE_CODE_RANGE)");
3561 case TYPE_CODE_STRING:
3562 printf_filtered ("(TYPE_CODE_STRING)");
3564 case TYPE_CODE_ERROR:
3565 printf_filtered ("(TYPE_CODE_ERROR)");
3567 case TYPE_CODE_MEMBERPTR:
3568 printf_filtered ("(TYPE_CODE_MEMBERPTR)");
3570 case TYPE_CODE_METHODPTR:
3571 printf_filtered ("(TYPE_CODE_METHODPTR)");
3573 case TYPE_CODE_METHOD:
3574 printf_filtered ("(TYPE_CODE_METHOD)");
3577 printf_filtered ("(TYPE_CODE_REF)");
3579 case TYPE_CODE_CHAR:
3580 printf_filtered ("(TYPE_CODE_CHAR)");
3582 case TYPE_CODE_BOOL:
3583 printf_filtered ("(TYPE_CODE_BOOL)");
3585 case TYPE_CODE_COMPLEX:
3586 printf_filtered ("(TYPE_CODE_COMPLEX)");
3588 case TYPE_CODE_TYPEDEF:
3589 printf_filtered ("(TYPE_CODE_TYPEDEF)");
3591 case TYPE_CODE_NAMESPACE:
3592 printf_filtered ("(TYPE_CODE_NAMESPACE)");
3595 printf_filtered ("(UNKNOWN TYPE CODE)");
3598 puts_filtered ("\n");
3599 printfi_filtered (spaces, "length %d\n", TYPE_LENGTH (type));
3600 if (TYPE_OBJFILE_OWNED (type))
3602 printfi_filtered (spaces, "objfile ");
3603 gdb_print_host_address (TYPE_OWNER (type).objfile, gdb_stdout);
3607 printfi_filtered (spaces, "gdbarch ");
3608 gdb_print_host_address (TYPE_OWNER (type).gdbarch, gdb_stdout);
3610 printf_filtered ("\n");
3611 printfi_filtered (spaces, "target_type ");
3612 gdb_print_host_address (TYPE_TARGET_TYPE (type), gdb_stdout);
3613 printf_filtered ("\n");
3614 if (TYPE_TARGET_TYPE (type) != NULL)
3616 recursive_dump_type (TYPE_TARGET_TYPE (type), spaces + 2);
3618 printfi_filtered (spaces, "pointer_type ");
3619 gdb_print_host_address (TYPE_POINTER_TYPE (type), gdb_stdout);
3620 printf_filtered ("\n");
3621 printfi_filtered (spaces, "reference_type ");
3622 gdb_print_host_address (TYPE_REFERENCE_TYPE (type), gdb_stdout);
3623 printf_filtered ("\n");
3624 printfi_filtered (spaces, "type_chain ");
3625 gdb_print_host_address (TYPE_CHAIN (type), gdb_stdout);
3626 printf_filtered ("\n");
3627 printfi_filtered (spaces, "instance_flags 0x%x",
3628 TYPE_INSTANCE_FLAGS (type));
3629 if (TYPE_CONST (type))
3631 puts_filtered (" TYPE_FLAG_CONST");
3633 if (TYPE_VOLATILE (type))
3635 puts_filtered (" TYPE_FLAG_VOLATILE");
3637 if (TYPE_CODE_SPACE (type))
3639 puts_filtered (" TYPE_FLAG_CODE_SPACE");
3641 if (TYPE_DATA_SPACE (type))
3643 puts_filtered (" TYPE_FLAG_DATA_SPACE");
3645 if (TYPE_ADDRESS_CLASS_1 (type))
3647 puts_filtered (" TYPE_FLAG_ADDRESS_CLASS_1");
3649 if (TYPE_ADDRESS_CLASS_2 (type))
3651 puts_filtered (" TYPE_FLAG_ADDRESS_CLASS_2");
3653 if (TYPE_RESTRICT (type))
3655 puts_filtered (" TYPE_FLAG_RESTRICT");
3657 puts_filtered ("\n");
3659 printfi_filtered (spaces, "flags");
3660 if (TYPE_UNSIGNED (type))
3662 puts_filtered (" TYPE_FLAG_UNSIGNED");
3664 if (TYPE_NOSIGN (type))
3666 puts_filtered (" TYPE_FLAG_NOSIGN");
3668 if (TYPE_STUB (type))
3670 puts_filtered (" TYPE_FLAG_STUB");
3672 if (TYPE_TARGET_STUB (type))
3674 puts_filtered (" TYPE_FLAG_TARGET_STUB");
3676 if (TYPE_STATIC (type))
3678 puts_filtered (" TYPE_FLAG_STATIC");
3680 if (TYPE_PROTOTYPED (type))
3682 puts_filtered (" TYPE_FLAG_PROTOTYPED");
3684 if (TYPE_INCOMPLETE (type))
3686 puts_filtered (" TYPE_FLAG_INCOMPLETE");
3688 if (TYPE_VARARGS (type))
3690 puts_filtered (" TYPE_FLAG_VARARGS");
3692 /* This is used for things like AltiVec registers on ppc. Gcc emits
3693 an attribute for the array type, which tells whether or not we
3694 have a vector, instead of a regular array. */
3695 if (TYPE_VECTOR (type))
3697 puts_filtered (" TYPE_FLAG_VECTOR");
3699 if (TYPE_FIXED_INSTANCE (type))
3701 puts_filtered (" TYPE_FIXED_INSTANCE");
3703 if (TYPE_STUB_SUPPORTED (type))
3705 puts_filtered (" TYPE_STUB_SUPPORTED");
3707 if (TYPE_NOTTEXT (type))
3709 puts_filtered (" TYPE_NOTTEXT");
3711 puts_filtered ("\n");
3712 printfi_filtered (spaces, "nfields %d ", TYPE_NFIELDS (type));
3713 gdb_print_host_address (TYPE_FIELDS (type), gdb_stdout);
3714 puts_filtered ("\n");
3715 for (idx = 0; idx < TYPE_NFIELDS (type); idx++)
3717 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
3718 printfi_filtered (spaces + 2,
3719 "[%d] enumval %s type ",
3720 idx, plongest (TYPE_FIELD_ENUMVAL (type, idx)));
3722 printfi_filtered (spaces + 2,
3723 "[%d] bitpos %d bitsize %d type ",
3724 idx, TYPE_FIELD_BITPOS (type, idx),
3725 TYPE_FIELD_BITSIZE (type, idx));
3726 gdb_print_host_address (TYPE_FIELD_TYPE (type, idx), gdb_stdout);
3727 printf_filtered (" name '%s' (",
3728 TYPE_FIELD_NAME (type, idx) != NULL
3729 ? TYPE_FIELD_NAME (type, idx)
3731 gdb_print_host_address (TYPE_FIELD_NAME (type, idx), gdb_stdout);
3732 printf_filtered (")\n");
3733 if (TYPE_FIELD_TYPE (type, idx) != NULL)
3735 recursive_dump_type (TYPE_FIELD_TYPE (type, idx), spaces + 4);
3738 if (TYPE_CODE (type) == TYPE_CODE_RANGE)
3740 printfi_filtered (spaces, "low %s%s high %s%s\n",
3741 plongest (TYPE_LOW_BOUND (type)),
3742 TYPE_LOW_BOUND_UNDEFINED (type) ? " (undefined)" : "",
3743 plongest (TYPE_HIGH_BOUND (type)),
3744 TYPE_HIGH_BOUND_UNDEFINED (type)
3745 ? " (undefined)" : "");
3747 printfi_filtered (spaces, "vptr_basetype ");
3748 gdb_print_host_address (TYPE_VPTR_BASETYPE (type), gdb_stdout);
3749 puts_filtered ("\n");
3750 if (TYPE_VPTR_BASETYPE (type) != NULL)
3752 recursive_dump_type (TYPE_VPTR_BASETYPE (type), spaces + 2);
3754 printfi_filtered (spaces, "vptr_fieldno %d\n",
3755 TYPE_VPTR_FIELDNO (type));
3757 switch (TYPE_SPECIFIC_FIELD (type))
3759 case TYPE_SPECIFIC_CPLUS_STUFF:
3760 printfi_filtered (spaces, "cplus_stuff ");
3761 gdb_print_host_address (TYPE_CPLUS_SPECIFIC (type),
3763 puts_filtered ("\n");
3764 print_cplus_stuff (type, spaces);
3767 case TYPE_SPECIFIC_GNAT_STUFF:
3768 printfi_filtered (spaces, "gnat_stuff ");
3769 gdb_print_host_address (TYPE_GNAT_SPECIFIC (type), gdb_stdout);
3770 puts_filtered ("\n");
3771 print_gnat_stuff (type, spaces);
3774 case TYPE_SPECIFIC_FLOATFORMAT:
3775 printfi_filtered (spaces, "floatformat ");
3776 if (TYPE_FLOATFORMAT (type) == NULL)
3777 puts_filtered ("(null)");
3780 puts_filtered ("{ ");
3781 if (TYPE_FLOATFORMAT (type)[0] == NULL
3782 || TYPE_FLOATFORMAT (type)[0]->name == NULL)
3783 puts_filtered ("(null)");
3785 puts_filtered (TYPE_FLOATFORMAT (type)[0]->name);
3787 puts_filtered (", ");
3788 if (TYPE_FLOATFORMAT (type)[1] == NULL
3789 || TYPE_FLOATFORMAT (type)[1]->name == NULL)
3790 puts_filtered ("(null)");
3792 puts_filtered (TYPE_FLOATFORMAT (type)[1]->name);
3794 puts_filtered (" }");
3796 puts_filtered ("\n");
3799 case TYPE_SPECIFIC_FUNC:
3800 printfi_filtered (spaces, "calling_convention %d\n",
3801 TYPE_CALLING_CONVENTION (type));
3802 /* tail_call_list is not printed. */
3807 obstack_free (&dont_print_type_obstack, NULL);
3810 /* Trivial helpers for the libiberty hash table, for mapping one
3815 struct type *old, *new;
3819 type_pair_hash (const void *item)
3821 const struct type_pair *pair = item;
3823 return htab_hash_pointer (pair->old);
3827 type_pair_eq (const void *item_lhs, const void *item_rhs)
3829 const struct type_pair *lhs = item_lhs, *rhs = item_rhs;
3831 return lhs->old == rhs->old;
3834 /* Allocate the hash table used by copy_type_recursive to walk
3835 types without duplicates. We use OBJFILE's obstack, because
3836 OBJFILE is about to be deleted. */
3839 create_copied_types_hash (struct objfile *objfile)
3841 return htab_create_alloc_ex (1, type_pair_hash, type_pair_eq,
3842 NULL, &objfile->objfile_obstack,
3843 hashtab_obstack_allocate,
3844 dummy_obstack_deallocate);
3847 /* Recursively copy (deep copy) TYPE, if it is associated with
3848 OBJFILE. Return a new type allocated using malloc, a saved type if
3849 we have already visited TYPE (using COPIED_TYPES), or TYPE if it is
3850 not associated with OBJFILE. */
3853 copy_type_recursive (struct objfile *objfile,
3855 htab_t copied_types)
3857 struct type_pair *stored, pair;
3859 struct type *new_type;
3861 if (! TYPE_OBJFILE_OWNED (type))
3864 /* This type shouldn't be pointing to any types in other objfiles;
3865 if it did, the type might disappear unexpectedly. */
3866 gdb_assert (TYPE_OBJFILE (type) == objfile);
3869 slot = htab_find_slot (copied_types, &pair, INSERT);
3871 return ((struct type_pair *) *slot)->new;
3873 new_type = alloc_type_arch (get_type_arch (type));
3875 /* We must add the new type to the hash table immediately, in case
3876 we encounter this type again during a recursive call below. */
3878 = obstack_alloc (&objfile->objfile_obstack, sizeof (struct type_pair));
3880 stored->new = new_type;
3883 /* Copy the common fields of types. For the main type, we simply
3884 copy the entire thing and then update specific fields as needed. */
3885 *TYPE_MAIN_TYPE (new_type) = *TYPE_MAIN_TYPE (type);
3886 TYPE_OBJFILE_OWNED (new_type) = 0;
3887 TYPE_OWNER (new_type).gdbarch = get_type_arch (type);
3889 if (TYPE_NAME (type))
3890 TYPE_NAME (new_type) = xstrdup (TYPE_NAME (type));
3891 if (TYPE_TAG_NAME (type))
3892 TYPE_TAG_NAME (new_type) = xstrdup (TYPE_TAG_NAME (type));
3894 TYPE_INSTANCE_FLAGS (new_type) = TYPE_INSTANCE_FLAGS (type);
3895 TYPE_LENGTH (new_type) = TYPE_LENGTH (type);
3897 /* Copy the fields. */
3898 if (TYPE_NFIELDS (type))
3902 nfields = TYPE_NFIELDS (type);
3903 TYPE_FIELDS (new_type) = XCNEWVEC (struct field, nfields);
3904 for (i = 0; i < nfields; i++)
3906 TYPE_FIELD_ARTIFICIAL (new_type, i) =
3907 TYPE_FIELD_ARTIFICIAL (type, i);
3908 TYPE_FIELD_BITSIZE (new_type, i) = TYPE_FIELD_BITSIZE (type, i);
3909 if (TYPE_FIELD_TYPE (type, i))
3910 TYPE_FIELD_TYPE (new_type, i)
3911 = copy_type_recursive (objfile, TYPE_FIELD_TYPE (type, i),
3913 if (TYPE_FIELD_NAME (type, i))
3914 TYPE_FIELD_NAME (new_type, i) =
3915 xstrdup (TYPE_FIELD_NAME (type, i));
3916 switch (TYPE_FIELD_LOC_KIND (type, i))
3918 case FIELD_LOC_KIND_BITPOS:
3919 SET_FIELD_BITPOS (TYPE_FIELD (new_type, i),
3920 TYPE_FIELD_BITPOS (type, i));
3922 case FIELD_LOC_KIND_ENUMVAL:
3923 SET_FIELD_ENUMVAL (TYPE_FIELD (new_type, i),
3924 TYPE_FIELD_ENUMVAL (type, i));
3926 case FIELD_LOC_KIND_PHYSADDR:
3927 SET_FIELD_PHYSADDR (TYPE_FIELD (new_type, i),
3928 TYPE_FIELD_STATIC_PHYSADDR (type, i));
3930 case FIELD_LOC_KIND_PHYSNAME:
3931 SET_FIELD_PHYSNAME (TYPE_FIELD (new_type, i),
3932 xstrdup (TYPE_FIELD_STATIC_PHYSNAME (type,
3936 internal_error (__FILE__, __LINE__,
3937 _("Unexpected type field location kind: %d"),
3938 TYPE_FIELD_LOC_KIND (type, i));
3943 /* For range types, copy the bounds information. */
3944 if (TYPE_CODE (type) == TYPE_CODE_RANGE)
3946 TYPE_RANGE_DATA (new_type) = xmalloc (sizeof (struct range_bounds));
3947 *TYPE_RANGE_DATA (new_type) = *TYPE_RANGE_DATA (type);
3950 /* Copy pointers to other types. */
3951 if (TYPE_TARGET_TYPE (type))
3952 TYPE_TARGET_TYPE (new_type) =
3953 copy_type_recursive (objfile,
3954 TYPE_TARGET_TYPE (type),
3956 if (TYPE_VPTR_BASETYPE (type))
3957 TYPE_VPTR_BASETYPE (new_type) =
3958 copy_type_recursive (objfile,
3959 TYPE_VPTR_BASETYPE (type),
3961 /* Maybe copy the type_specific bits.
3963 NOTE drow/2005-12-09: We do not copy the C++-specific bits like
3964 base classes and methods. There's no fundamental reason why we
3965 can't, but at the moment it is not needed. */
3967 if (TYPE_CODE (type) == TYPE_CODE_FLT)
3968 TYPE_FLOATFORMAT (new_type) = TYPE_FLOATFORMAT (type);
3969 else if (TYPE_CODE (type) == TYPE_CODE_STRUCT
3970 || TYPE_CODE (type) == TYPE_CODE_UNION
3971 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
3972 INIT_CPLUS_SPECIFIC (new_type);
3977 /* Make a copy of the given TYPE, except that the pointer & reference
3978 types are not preserved.
3980 This function assumes that the given type has an associated objfile.
3981 This objfile is used to allocate the new type. */
3984 copy_type (const struct type *type)
3986 struct type *new_type;
3988 gdb_assert (TYPE_OBJFILE_OWNED (type));
3990 new_type = alloc_type_copy (type);
3991 TYPE_INSTANCE_FLAGS (new_type) = TYPE_INSTANCE_FLAGS (type);
3992 TYPE_LENGTH (new_type) = TYPE_LENGTH (type);
3993 memcpy (TYPE_MAIN_TYPE (new_type), TYPE_MAIN_TYPE (type),
3994 sizeof (struct main_type));
3999 /* Helper functions to initialize architecture-specific types. */
4001 /* Allocate a type structure associated with GDBARCH and set its
4002 CODE, LENGTH, and NAME fields. */
4005 arch_type (struct gdbarch *gdbarch,
4006 enum type_code code, int length, char *name)
4010 type = alloc_type_arch (gdbarch);
4011 TYPE_CODE (type) = code;
4012 TYPE_LENGTH (type) = length;
4015 TYPE_NAME (type) = xstrdup (name);
4020 /* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
4021 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
4022 the type's TYPE_UNSIGNED flag. NAME is the type name. */
4025 arch_integer_type (struct gdbarch *gdbarch,
4026 int bit, int unsigned_p, char *name)
4030 t = arch_type (gdbarch, TYPE_CODE_INT, bit / TARGET_CHAR_BIT, name);
4032 TYPE_UNSIGNED (t) = 1;
4033 if (name && strcmp (name, "char") == 0)
4034 TYPE_NOSIGN (t) = 1;
4039 /* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
4040 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
4041 the type's TYPE_UNSIGNED flag. NAME is the type name. */
4044 arch_character_type (struct gdbarch *gdbarch,
4045 int bit, int unsigned_p, char *name)
4049 t = arch_type (gdbarch, TYPE_CODE_CHAR, bit / TARGET_CHAR_BIT, name);
4051 TYPE_UNSIGNED (t) = 1;
4056 /* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
4057 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
4058 the type's TYPE_UNSIGNED flag. NAME is the type name. */
4061 arch_boolean_type (struct gdbarch *gdbarch,
4062 int bit, int unsigned_p, char *name)
4066 t = arch_type (gdbarch, TYPE_CODE_BOOL, bit / TARGET_CHAR_BIT, name);
4068 TYPE_UNSIGNED (t) = 1;
4073 /* Allocate a TYPE_CODE_FLT type structure associated with GDBARCH.
4074 BIT is the type size in bits; if BIT equals -1, the size is
4075 determined by the floatformat. NAME is the type name. Set the
4076 TYPE_FLOATFORMAT from FLOATFORMATS. */
4079 arch_float_type (struct gdbarch *gdbarch,
4080 int bit, char *name, const struct floatformat **floatformats)
4086 gdb_assert (floatformats != NULL);
4087 gdb_assert (floatformats[0] != NULL && floatformats[1] != NULL);
4088 bit = floatformats[0]->totalsize;
4090 gdb_assert (bit >= 0);
4092 t = arch_type (gdbarch, TYPE_CODE_FLT, bit / TARGET_CHAR_BIT, name);
4093 TYPE_FLOATFORMAT (t) = floatformats;
4097 /* Allocate a TYPE_CODE_COMPLEX type structure associated with GDBARCH.
4098 NAME is the type name. TARGET_TYPE is the component float type. */
4101 arch_complex_type (struct gdbarch *gdbarch,
4102 char *name, struct type *target_type)
4106 t = arch_type (gdbarch, TYPE_CODE_COMPLEX,
4107 2 * TYPE_LENGTH (target_type), name);
4108 TYPE_TARGET_TYPE (t) = target_type;
4112 /* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
4113 NAME is the type name. LENGTH is the size of the flag word in bytes. */
4116 arch_flags_type (struct gdbarch *gdbarch, char *name, int length)
4118 int nfields = length * TARGET_CHAR_BIT;
4121 type = arch_type (gdbarch, TYPE_CODE_FLAGS, length, name);
4122 TYPE_UNSIGNED (type) = 1;
4123 TYPE_NFIELDS (type) = nfields;
4124 TYPE_FIELDS (type) = TYPE_ZALLOC (type, nfields * sizeof (struct field));
4129 /* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
4130 position BITPOS is called NAME. */
4133 append_flags_type_flag (struct type *type, int bitpos, char *name)
4135 gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLAGS);
4136 gdb_assert (bitpos < TYPE_NFIELDS (type));
4137 gdb_assert (bitpos >= 0);
4141 TYPE_FIELD_NAME (type, bitpos) = xstrdup (name);
4142 SET_FIELD_BITPOS (TYPE_FIELD (type, bitpos), bitpos);
4146 /* Don't show this field to the user. */
4147 SET_FIELD_BITPOS (TYPE_FIELD (type, bitpos), -1);
4151 /* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
4152 specified by CODE) associated with GDBARCH. NAME is the type name. */
4155 arch_composite_type (struct gdbarch *gdbarch, char *name, enum type_code code)
4159 gdb_assert (code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION);
4160 t = arch_type (gdbarch, code, 0, NULL);
4161 TYPE_TAG_NAME (t) = name;
4162 INIT_CPLUS_SPECIFIC (t);
4166 /* Add new field with name NAME and type FIELD to composite type T.
4167 Do not set the field's position or adjust the type's length;
4168 the caller should do so. Return the new field. */
4171 append_composite_type_field_raw (struct type *t, char *name,
4176 TYPE_NFIELDS (t) = TYPE_NFIELDS (t) + 1;
4177 TYPE_FIELDS (t) = xrealloc (TYPE_FIELDS (t),
4178 sizeof (struct field) * TYPE_NFIELDS (t));
4179 f = &(TYPE_FIELDS (t)[TYPE_NFIELDS (t) - 1]);
4180 memset (f, 0, sizeof f[0]);
4181 FIELD_TYPE (f[0]) = field;
4182 FIELD_NAME (f[0]) = name;
4186 /* Add new field with name NAME and type FIELD to composite type T.
4187 ALIGNMENT (if non-zero) specifies the minimum field alignment. */
4190 append_composite_type_field_aligned (struct type *t, char *name,
4191 struct type *field, int alignment)
4193 struct field *f = append_composite_type_field_raw (t, name, field);
4195 if (TYPE_CODE (t) == TYPE_CODE_UNION)
4197 if (TYPE_LENGTH (t) < TYPE_LENGTH (field))
4198 TYPE_LENGTH (t) = TYPE_LENGTH (field);
4200 else if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
4202 TYPE_LENGTH (t) = TYPE_LENGTH (t) + TYPE_LENGTH (field);
4203 if (TYPE_NFIELDS (t) > 1)
4205 SET_FIELD_BITPOS (f[0],
4206 (FIELD_BITPOS (f[-1])
4207 + (TYPE_LENGTH (FIELD_TYPE (f[-1]))
4208 * TARGET_CHAR_BIT)));
4214 alignment *= TARGET_CHAR_BIT;
4215 left = FIELD_BITPOS (f[0]) % alignment;
4219 SET_FIELD_BITPOS (f[0], FIELD_BITPOS (f[0]) + (alignment - left));
4220 TYPE_LENGTH (t) += (alignment - left) / TARGET_CHAR_BIT;
4227 /* Add new field with name NAME and type FIELD to composite type T. */
4230 append_composite_type_field (struct type *t, char *name,
4233 append_composite_type_field_aligned (t, name, field, 0);
4236 static struct gdbarch_data *gdbtypes_data;
4238 const struct builtin_type *
4239 builtin_type (struct gdbarch *gdbarch)
4241 return gdbarch_data (gdbarch, gdbtypes_data);
4245 gdbtypes_post_init (struct gdbarch *gdbarch)
4247 struct builtin_type *builtin_type
4248 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_type);
4251 builtin_type->builtin_void
4252 = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
4253 builtin_type->builtin_char
4254 = arch_integer_type (gdbarch, TARGET_CHAR_BIT,
4255 !gdbarch_char_signed (gdbarch), "char");
4256 builtin_type->builtin_signed_char
4257 = arch_integer_type (gdbarch, TARGET_CHAR_BIT,
4259 builtin_type->builtin_unsigned_char
4260 = arch_integer_type (gdbarch, TARGET_CHAR_BIT,
4261 1, "unsigned char");
4262 builtin_type->builtin_short
4263 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch),
4265 builtin_type->builtin_unsigned_short
4266 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch),
4267 1, "unsigned short");
4268 builtin_type->builtin_int
4269 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
4271 builtin_type->builtin_unsigned_int
4272 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
4274 builtin_type->builtin_long
4275 = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
4277 builtin_type->builtin_unsigned_long
4278 = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
4279 1, "unsigned long");
4280 builtin_type->builtin_long_long
4281 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch),
4283 builtin_type->builtin_unsigned_long_long
4284 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch),
4285 1, "unsigned long long");
4286 builtin_type->builtin_float
4287 = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
4288 "float", gdbarch_float_format (gdbarch));
4289 builtin_type->builtin_double
4290 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
4291 "double", gdbarch_double_format (gdbarch));
4292 builtin_type->builtin_long_double
4293 = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
4294 "long double", gdbarch_long_double_format (gdbarch));
4295 builtin_type->builtin_complex
4296 = arch_complex_type (gdbarch, "complex",
4297 builtin_type->builtin_float);
4298 builtin_type->builtin_double_complex
4299 = arch_complex_type (gdbarch, "double complex",
4300 builtin_type->builtin_double);
4301 builtin_type->builtin_string
4302 = arch_type (gdbarch, TYPE_CODE_STRING, 1, "string");
4303 builtin_type->builtin_bool
4304 = arch_type (gdbarch, TYPE_CODE_BOOL, 1, "bool");
4306 /* The following three are about decimal floating point types, which
4307 are 32-bits, 64-bits and 128-bits respectively. */
4308 builtin_type->builtin_decfloat
4309 = arch_type (gdbarch, TYPE_CODE_DECFLOAT, 32 / 8, "_Decimal32");
4310 builtin_type->builtin_decdouble
4311 = arch_type (gdbarch, TYPE_CODE_DECFLOAT, 64 / 8, "_Decimal64");
4312 builtin_type->builtin_declong
4313 = arch_type (gdbarch, TYPE_CODE_DECFLOAT, 128 / 8, "_Decimal128");
4315 /* "True" character types. */
4316 builtin_type->builtin_true_char
4317 = arch_character_type (gdbarch, TARGET_CHAR_BIT, 0, "true character");
4318 builtin_type->builtin_true_unsigned_char
4319 = arch_character_type (gdbarch, TARGET_CHAR_BIT, 1, "true character");
4321 /* Fixed-size integer types. */
4322 builtin_type->builtin_int0
4323 = arch_integer_type (gdbarch, 0, 0, "int0_t");
4324 builtin_type->builtin_int8
4325 = arch_integer_type (gdbarch, 8, 0, "int8_t");
4326 builtin_type->builtin_uint8
4327 = arch_integer_type (gdbarch, 8, 1, "uint8_t");
4328 builtin_type->builtin_int16
4329 = arch_integer_type (gdbarch, 16, 0, "int16_t");
4330 builtin_type->builtin_uint16
4331 = arch_integer_type (gdbarch, 16, 1, "uint16_t");
4332 builtin_type->builtin_int32
4333 = arch_integer_type (gdbarch, 32, 0, "int32_t");
4334 builtin_type->builtin_uint32
4335 = arch_integer_type (gdbarch, 32, 1, "uint32_t");
4336 builtin_type->builtin_int64
4337 = arch_integer_type (gdbarch, 64, 0, "int64_t");
4338 builtin_type->builtin_uint64
4339 = arch_integer_type (gdbarch, 64, 1, "uint64_t");
4340 builtin_type->builtin_int128
4341 = arch_integer_type (gdbarch, 128, 0, "int128_t");
4342 builtin_type->builtin_uint128
4343 = arch_integer_type (gdbarch, 128, 1, "uint128_t");
4344 TYPE_INSTANCE_FLAGS (builtin_type->builtin_int8) |=
4345 TYPE_INSTANCE_FLAG_NOTTEXT;
4346 TYPE_INSTANCE_FLAGS (builtin_type->builtin_uint8) |=
4347 TYPE_INSTANCE_FLAG_NOTTEXT;
4349 /* Wide character types. */
4350 builtin_type->builtin_char16
4351 = arch_integer_type (gdbarch, 16, 0, "char16_t");
4352 builtin_type->builtin_char32
4353 = arch_integer_type (gdbarch, 32, 0, "char32_t");
4356 /* Default data/code pointer types. */
4357 builtin_type->builtin_data_ptr
4358 = lookup_pointer_type (builtin_type->builtin_void);
4359 builtin_type->builtin_func_ptr
4360 = lookup_pointer_type (lookup_function_type (builtin_type->builtin_void));
4361 builtin_type->builtin_func_func
4362 = lookup_function_type (builtin_type->builtin_func_ptr);
4364 /* This type represents a GDB internal function. */
4365 builtin_type->internal_fn
4366 = arch_type (gdbarch, TYPE_CODE_INTERNAL_FUNCTION, 0,
4367 "<internal function>");
4369 return builtin_type;
4372 /* This set of objfile-based types is intended to be used by symbol
4373 readers as basic types. */
4375 static const struct objfile_data *objfile_type_data;
4377 const struct objfile_type *
4378 objfile_type (struct objfile *objfile)
4380 struct gdbarch *gdbarch;
4381 struct objfile_type *objfile_type
4382 = objfile_data (objfile, objfile_type_data);
4385 return objfile_type;
4387 objfile_type = OBSTACK_CALLOC (&objfile->objfile_obstack,
4388 1, struct objfile_type);
4390 /* Use the objfile architecture to determine basic type properties. */
4391 gdbarch = get_objfile_arch (objfile);
4394 objfile_type->builtin_void
4395 = init_type (TYPE_CODE_VOID, 1,
4399 objfile_type->builtin_char
4400 = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
4402 | (gdbarch_char_signed (gdbarch) ? 0 : TYPE_FLAG_UNSIGNED)),
4404 objfile_type->builtin_signed_char
4405 = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
4407 "signed char", objfile);
4408 objfile_type->builtin_unsigned_char
4409 = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
4411 "unsigned char", objfile);
4412 objfile_type->builtin_short
4413 = init_type (TYPE_CODE_INT,
4414 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
4415 0, "short", objfile);
4416 objfile_type->builtin_unsigned_short
4417 = init_type (TYPE_CODE_INT,
4418 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
4419 TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
4420 objfile_type->builtin_int
4421 = init_type (TYPE_CODE_INT,
4422 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
4424 objfile_type->builtin_unsigned_int
4425 = init_type (TYPE_CODE_INT,
4426 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
4427 TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
4428 objfile_type->builtin_long
4429 = init_type (TYPE_CODE_INT,
4430 gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT,
4431 0, "long", objfile);
4432 objfile_type->builtin_unsigned_long
4433 = init_type (TYPE_CODE_INT,
4434 gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT,
4435 TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
4436 objfile_type->builtin_long_long
4437 = init_type (TYPE_CODE_INT,
4438 gdbarch_long_long_bit (gdbarch) / TARGET_CHAR_BIT,
4439 0, "long long", objfile);
4440 objfile_type->builtin_unsigned_long_long
4441 = init_type (TYPE_CODE_INT,
4442 gdbarch_long_long_bit (gdbarch) / TARGET_CHAR_BIT,
4443 TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
4445 objfile_type->builtin_float
4446 = init_type (TYPE_CODE_FLT,
4447 gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
4448 0, "float", objfile);
4449 TYPE_FLOATFORMAT (objfile_type->builtin_float)
4450 = gdbarch_float_format (gdbarch);
4451 objfile_type->builtin_double
4452 = init_type (TYPE_CODE_FLT,
4453 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
4454 0, "double", objfile);
4455 TYPE_FLOATFORMAT (objfile_type->builtin_double)
4456 = gdbarch_double_format (gdbarch);
4457 objfile_type->builtin_long_double
4458 = init_type (TYPE_CODE_FLT,
4459 gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
4460 0, "long double", objfile);
4461 TYPE_FLOATFORMAT (objfile_type->builtin_long_double)
4462 = gdbarch_long_double_format (gdbarch);
4464 /* This type represents a type that was unrecognized in symbol read-in. */
4465 objfile_type->builtin_error
4466 = init_type (TYPE_CODE_ERROR, 0, 0, "<unknown type>", objfile);
4468 /* The following set of types is used for symbols with no
4469 debug information. */
4470 objfile_type->nodebug_text_symbol
4471 = init_type (TYPE_CODE_FUNC, 1, 0,
4472 "<text variable, no debug info>", objfile);
4473 TYPE_TARGET_TYPE (objfile_type->nodebug_text_symbol)
4474 = objfile_type->builtin_int;
4475 objfile_type->nodebug_text_gnu_ifunc_symbol
4476 = init_type (TYPE_CODE_FUNC, 1, TYPE_FLAG_GNU_IFUNC,
4477 "<text gnu-indirect-function variable, no debug info>",
4479 TYPE_TARGET_TYPE (objfile_type->nodebug_text_gnu_ifunc_symbol)
4480 = objfile_type->nodebug_text_symbol;
4481 objfile_type->nodebug_got_plt_symbol
4482 = init_type (TYPE_CODE_PTR, gdbarch_addr_bit (gdbarch) / 8, 0,
4483 "<text from jump slot in .got.plt, no debug info>",
4485 TYPE_TARGET_TYPE (objfile_type->nodebug_got_plt_symbol)
4486 = objfile_type->nodebug_text_symbol;
4487 objfile_type->nodebug_data_symbol
4488 = init_type (TYPE_CODE_INT,
4489 gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT, 0,
4490 "<data variable, no debug info>", objfile);
4491 objfile_type->nodebug_unknown_symbol
4492 = init_type (TYPE_CODE_INT, 1, 0,
4493 "<variable (not text or data), no debug info>", objfile);
4494 objfile_type->nodebug_tls_symbol
4495 = init_type (TYPE_CODE_INT,
4496 gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT, 0,
4497 "<thread local variable, no debug info>", objfile);
4499 /* NOTE: on some targets, addresses and pointers are not necessarily
4503 - gdb's `struct type' always describes the target's
4505 - gdb's `struct value' objects should always hold values in
4507 - gdb's CORE_ADDR values are addresses in the unified virtual
4508 address space that the assembler and linker work with. Thus,
4509 since target_read_memory takes a CORE_ADDR as an argument, it
4510 can access any memory on the target, even if the processor has
4511 separate code and data address spaces.
4513 In this context, objfile_type->builtin_core_addr is a bit odd:
4514 it's a target type for a value the target will never see. It's
4515 only used to hold the values of (typeless) linker symbols, which
4516 are indeed in the unified virtual address space. */
4518 objfile_type->builtin_core_addr
4519 = init_type (TYPE_CODE_INT,
4520 gdbarch_addr_bit (gdbarch) / 8,
4521 TYPE_FLAG_UNSIGNED, "__CORE_ADDR", objfile);
4523 set_objfile_data (objfile, objfile_type_data, objfile_type);
4524 return objfile_type;
4527 extern initialize_file_ftype _initialize_gdbtypes;
4530 _initialize_gdbtypes (void)
4532 gdbtypes_data = gdbarch_data_register_post_init (gdbtypes_post_init);
4533 objfile_type_data = register_objfile_data ();
4535 add_setshow_zuinteger_cmd ("overload", no_class, &overload_debug,
4536 _("Set debugging of C++ overloading."),
4537 _("Show debugging of C++ overloading."),
4538 _("When enabled, ranking of the "
4539 "functions is displayed."),
4541 show_overload_debug,
4542 &setdebuglist, &showdebuglist);
4544 /* Add user knob for controlling resolution of opaque types. */
4545 add_setshow_boolean_cmd ("opaque-type-resolution", class_support,
4546 &opaque_type_resolution,
4547 _("Set resolution of opaque struct/class/union"
4548 " types (if set before loading symbols)."),
4549 _("Show resolution of opaque struct/class/union"
4550 " types (if set before loading symbols)."),
4552 show_opaque_type_resolution,
4553 &setlist, &showlist);
4555 /* Add an option to permit non-strict type checking. */
4556 add_setshow_boolean_cmd ("type", class_support,
4557 &strict_type_checking,
4558 _("Set strict type checking."),
4559 _("Show strict type checking."),
4561 show_strict_type_checking,
4562 &setchecklist, &showchecklist);