1 /* Support routines for manipulating internal types for GDB.
3 Copyright (C) 1992-2015 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/>. */
28 #include "expression.h"
33 #include "complaints.h"
37 #include "cp-support.h"
39 #include "dwarf2loc.h"
42 /* Initialize BADNESS constants. */
44 const struct rank LENGTH_MISMATCH_BADNESS = {100,0};
46 const struct rank TOO_FEW_PARAMS_BADNESS = {100,0};
47 const struct rank INCOMPATIBLE_TYPE_BADNESS = {100,0};
49 const struct rank EXACT_MATCH_BADNESS = {0,0};
51 const struct rank INTEGER_PROMOTION_BADNESS = {1,0};
52 const struct rank FLOAT_PROMOTION_BADNESS = {1,0};
53 const struct rank BASE_PTR_CONVERSION_BADNESS = {1,0};
54 const struct rank INTEGER_CONVERSION_BADNESS = {2,0};
55 const struct rank FLOAT_CONVERSION_BADNESS = {2,0};
56 const struct rank INT_FLOAT_CONVERSION_BADNESS = {2,0};
57 const struct rank VOID_PTR_CONVERSION_BADNESS = {2,0};
58 const struct rank BOOL_CONVERSION_BADNESS = {3,0};
59 const struct rank BASE_CONVERSION_BADNESS = {2,0};
60 const struct rank REFERENCE_CONVERSION_BADNESS = {2,0};
61 const struct rank NULL_POINTER_CONVERSION_BADNESS = {2,0};
62 const struct rank NS_POINTER_CONVERSION_BADNESS = {10,0};
63 const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS = {3,0};
65 /* Floatformat pairs. */
66 const struct floatformat *floatformats_ieee_half[BFD_ENDIAN_UNKNOWN] = {
67 &floatformat_ieee_half_big,
68 &floatformat_ieee_half_little
70 const struct floatformat *floatformats_ieee_single[BFD_ENDIAN_UNKNOWN] = {
71 &floatformat_ieee_single_big,
72 &floatformat_ieee_single_little
74 const struct floatformat *floatformats_ieee_double[BFD_ENDIAN_UNKNOWN] = {
75 &floatformat_ieee_double_big,
76 &floatformat_ieee_double_little
78 const struct floatformat *floatformats_ieee_double_littlebyte_bigword[BFD_ENDIAN_UNKNOWN] = {
79 &floatformat_ieee_double_big,
80 &floatformat_ieee_double_littlebyte_bigword
82 const struct floatformat *floatformats_i387_ext[BFD_ENDIAN_UNKNOWN] = {
83 &floatformat_i387_ext,
86 const struct floatformat *floatformats_m68881_ext[BFD_ENDIAN_UNKNOWN] = {
87 &floatformat_m68881_ext,
88 &floatformat_m68881_ext
90 const struct floatformat *floatformats_arm_ext[BFD_ENDIAN_UNKNOWN] = {
91 &floatformat_arm_ext_big,
92 &floatformat_arm_ext_littlebyte_bigword
94 const struct floatformat *floatformats_ia64_spill[BFD_ENDIAN_UNKNOWN] = {
95 &floatformat_ia64_spill_big,
96 &floatformat_ia64_spill_little
98 const struct floatformat *floatformats_ia64_quad[BFD_ENDIAN_UNKNOWN] = {
99 &floatformat_ia64_quad_big,
100 &floatformat_ia64_quad_little
102 const struct floatformat *floatformats_vax_f[BFD_ENDIAN_UNKNOWN] = {
106 const struct floatformat *floatformats_vax_d[BFD_ENDIAN_UNKNOWN] = {
110 const struct floatformat *floatformats_ibm_long_double[BFD_ENDIAN_UNKNOWN] = {
111 &floatformat_ibm_long_double_big,
112 &floatformat_ibm_long_double_little
115 /* Should opaque types be resolved? */
117 static int opaque_type_resolution = 1;
119 /* A flag to enable printing of debugging information of C++
122 unsigned int overload_debug = 0;
124 /* A flag to enable strict type checking. */
126 static int strict_type_checking = 1;
128 /* A function to show whether opaque types are resolved. */
131 show_opaque_type_resolution (struct ui_file *file, int from_tty,
132 struct cmd_list_element *c,
135 fprintf_filtered (file, _("Resolution of opaque struct/class/union types "
136 "(if set before loading symbols) is %s.\n"),
140 /* A function to show whether C++ overload debugging is enabled. */
143 show_overload_debug (struct ui_file *file, int from_tty,
144 struct cmd_list_element *c, const char *value)
146 fprintf_filtered (file, _("Debugging of C++ overloading is %s.\n"),
150 /* A function to show the status of strict type checking. */
153 show_strict_type_checking (struct ui_file *file, int from_tty,
154 struct cmd_list_element *c, const char *value)
156 fprintf_filtered (file, _("Strict type checking is %s.\n"), value);
160 /* Allocate a new OBJFILE-associated type structure and fill it
161 with some defaults. Space for the type structure is allocated
162 on the objfile's objfile_obstack. */
165 alloc_type (struct objfile *objfile)
169 gdb_assert (objfile != NULL);
171 /* Alloc the structure and start off with all fields zeroed. */
172 type = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct type);
173 TYPE_MAIN_TYPE (type) = OBSTACK_ZALLOC (&objfile->objfile_obstack,
175 OBJSTAT (objfile, n_types++);
177 TYPE_OBJFILE_OWNED (type) = 1;
178 TYPE_OWNER (type).objfile = objfile;
180 /* Initialize the fields that might not be zero. */
182 TYPE_CODE (type) = TYPE_CODE_UNDEF;
183 TYPE_CHAIN (type) = type; /* Chain back to itself. */
188 /* Allocate a new GDBARCH-associated type structure and fill it
189 with some defaults. Space for the type structure is allocated
193 alloc_type_arch (struct gdbarch *gdbarch)
197 gdb_assert (gdbarch != NULL);
199 /* Alloc the structure and start off with all fields zeroed. */
201 type = XCNEW (struct type);
202 TYPE_MAIN_TYPE (type) = XCNEW (struct main_type);
204 TYPE_OBJFILE_OWNED (type) = 0;
205 TYPE_OWNER (type).gdbarch = gdbarch;
207 /* Initialize the fields that might not be zero. */
209 TYPE_CODE (type) = TYPE_CODE_UNDEF;
210 TYPE_CHAIN (type) = type; /* Chain back to itself. */
215 /* If TYPE is objfile-associated, allocate a new type structure
216 associated with the same objfile. If TYPE is gdbarch-associated,
217 allocate a new type structure associated with the same gdbarch. */
220 alloc_type_copy (const struct type *type)
222 if (TYPE_OBJFILE_OWNED (type))
223 return alloc_type (TYPE_OWNER (type).objfile);
225 return alloc_type_arch (TYPE_OWNER (type).gdbarch);
228 /* If TYPE is gdbarch-associated, return that architecture.
229 If TYPE is objfile-associated, return that objfile's architecture. */
232 get_type_arch (const struct type *type)
234 if (TYPE_OBJFILE_OWNED (type))
235 return get_objfile_arch (TYPE_OWNER (type).objfile);
237 return TYPE_OWNER (type).gdbarch;
240 /* See gdbtypes.h. */
243 get_target_type (struct type *type)
247 type = TYPE_TARGET_TYPE (type);
249 type = check_typedef (type);
255 /* Alloc a new type instance structure, fill it with some defaults,
256 and point it at OLDTYPE. Allocate the new type instance from the
257 same place as OLDTYPE. */
260 alloc_type_instance (struct type *oldtype)
264 /* Allocate the structure. */
266 if (! TYPE_OBJFILE_OWNED (oldtype))
267 type = XCNEW (struct type);
269 type = OBSTACK_ZALLOC (&TYPE_OBJFILE (oldtype)->objfile_obstack,
272 TYPE_MAIN_TYPE (type) = TYPE_MAIN_TYPE (oldtype);
274 TYPE_CHAIN (type) = type; /* Chain back to itself for now. */
279 /* Clear all remnants of the previous type at TYPE, in preparation for
280 replacing it with something else. Preserve owner information. */
283 smash_type (struct type *type)
285 int objfile_owned = TYPE_OBJFILE_OWNED (type);
286 union type_owner owner = TYPE_OWNER (type);
288 memset (TYPE_MAIN_TYPE (type), 0, sizeof (struct main_type));
290 /* Restore owner information. */
291 TYPE_OBJFILE_OWNED (type) = objfile_owned;
292 TYPE_OWNER (type) = owner;
294 /* For now, delete the rings. */
295 TYPE_CHAIN (type) = type;
297 /* For now, leave the pointer/reference types alone. */
300 /* Lookup a pointer to a type TYPE. TYPEPTR, if nonzero, points
301 to a pointer to memory where the pointer type should be stored.
302 If *TYPEPTR is zero, update it to point to the pointer type we return.
303 We allocate new memory if needed. */
306 make_pointer_type (struct type *type, struct type **typeptr)
308 struct type *ntype; /* New type */
311 ntype = TYPE_POINTER_TYPE (type);
316 return ntype; /* Don't care about alloc,
317 and have new type. */
318 else if (*typeptr == 0)
320 *typeptr = ntype; /* Tracking alloc, and have new type. */
325 if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */
327 ntype = alloc_type_copy (type);
331 else /* We have storage, but need to reset it. */
334 chain = TYPE_CHAIN (ntype);
336 TYPE_CHAIN (ntype) = chain;
339 TYPE_TARGET_TYPE (ntype) = type;
340 TYPE_POINTER_TYPE (type) = ntype;
342 /* FIXME! Assumes the machine has only one representation for pointers! */
345 = gdbarch_ptr_bit (get_type_arch (type)) / TARGET_CHAR_BIT;
346 TYPE_CODE (ntype) = TYPE_CODE_PTR;
348 /* Mark pointers as unsigned. The target converts between pointers
349 and addresses (CORE_ADDRs) using gdbarch_pointer_to_address and
350 gdbarch_address_to_pointer. */
351 TYPE_UNSIGNED (ntype) = 1;
353 /* Update the length of all the other variants of this type. */
354 chain = TYPE_CHAIN (ntype);
355 while (chain != ntype)
357 TYPE_LENGTH (chain) = TYPE_LENGTH (ntype);
358 chain = TYPE_CHAIN (chain);
364 /* Given a type TYPE, return a type of pointers to that type.
365 May need to construct such a type if this is the first use. */
368 lookup_pointer_type (struct type *type)
370 return make_pointer_type (type, (struct type **) 0);
373 /* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero,
374 points to a pointer to memory where the reference type should be
375 stored. If *TYPEPTR is zero, update it to point to the reference
376 type we return. We allocate new memory if needed. */
379 make_reference_type (struct type *type, struct type **typeptr)
381 struct type *ntype; /* New type */
384 ntype = TYPE_REFERENCE_TYPE (type);
389 return ntype; /* Don't care about alloc,
390 and have new type. */
391 else if (*typeptr == 0)
393 *typeptr = ntype; /* Tracking alloc, and have new type. */
398 if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */
400 ntype = alloc_type_copy (type);
404 else /* We have storage, but need to reset it. */
407 chain = TYPE_CHAIN (ntype);
409 TYPE_CHAIN (ntype) = chain;
412 TYPE_TARGET_TYPE (ntype) = type;
413 TYPE_REFERENCE_TYPE (type) = ntype;
415 /* FIXME! Assume the machine has only one representation for
416 references, and that it matches the (only) representation for
419 TYPE_LENGTH (ntype) =
420 gdbarch_ptr_bit (get_type_arch (type)) / TARGET_CHAR_BIT;
421 TYPE_CODE (ntype) = TYPE_CODE_REF;
423 if (!TYPE_REFERENCE_TYPE (type)) /* Remember it, if don't have one. */
424 TYPE_REFERENCE_TYPE (type) = ntype;
426 /* Update the length of all the other variants of this type. */
427 chain = TYPE_CHAIN (ntype);
428 while (chain != ntype)
430 TYPE_LENGTH (chain) = TYPE_LENGTH (ntype);
431 chain = TYPE_CHAIN (chain);
437 /* Same as above, but caller doesn't care about memory allocation
441 lookup_reference_type (struct type *type)
443 return make_reference_type (type, (struct type **) 0);
446 /* Lookup a function type that returns type TYPE. TYPEPTR, if
447 nonzero, points to a pointer to memory where the function type
448 should be stored. If *TYPEPTR is zero, update it to point to the
449 function type we return. We allocate new memory if needed. */
452 make_function_type (struct type *type, struct type **typeptr)
454 struct type *ntype; /* New type */
456 if (typeptr == 0 || *typeptr == 0) /* We'll need to allocate one. */
458 ntype = alloc_type_copy (type);
462 else /* We have storage, but need to reset it. */
468 TYPE_TARGET_TYPE (ntype) = type;
470 TYPE_LENGTH (ntype) = 1;
471 TYPE_CODE (ntype) = TYPE_CODE_FUNC;
473 INIT_FUNC_SPECIFIC (ntype);
478 /* Given a type TYPE, return a type of functions that return that type.
479 May need to construct such a type if this is the first use. */
482 lookup_function_type (struct type *type)
484 return make_function_type (type, (struct type **) 0);
487 /* Given a type TYPE and argument types, return the appropriate
488 function type. If the final type in PARAM_TYPES is NULL, make a
492 lookup_function_type_with_arguments (struct type *type,
494 struct type **param_types)
496 struct type *fn = make_function_type (type, (struct type **) 0);
501 if (param_types[nparams - 1] == NULL)
504 TYPE_VARARGS (fn) = 1;
506 else if (TYPE_CODE (check_typedef (param_types[nparams - 1]))
510 /* Caller should have ensured this. */
511 gdb_assert (nparams == 0);
512 TYPE_PROTOTYPED (fn) = 1;
516 TYPE_NFIELDS (fn) = nparams;
517 TYPE_FIELDS (fn) = TYPE_ZALLOC (fn, nparams * sizeof (struct field));
518 for (i = 0; i < nparams; ++i)
519 TYPE_FIELD_TYPE (fn, i) = param_types[i];
524 /* Identify address space identifier by name --
525 return the integer flag defined in gdbtypes.h. */
528 address_space_name_to_int (struct gdbarch *gdbarch, char *space_identifier)
532 /* Check for known address space delimiters. */
533 if (!strcmp (space_identifier, "code"))
534 return TYPE_INSTANCE_FLAG_CODE_SPACE;
535 else if (!strcmp (space_identifier, "data"))
536 return TYPE_INSTANCE_FLAG_DATA_SPACE;
537 else if (gdbarch_address_class_name_to_type_flags_p (gdbarch)
538 && gdbarch_address_class_name_to_type_flags (gdbarch,
543 error (_("Unknown address space specifier: \"%s\""), space_identifier);
546 /* Identify address space identifier by integer flag as defined in
547 gdbtypes.h -- return the string version of the adress space name. */
550 address_space_int_to_name (struct gdbarch *gdbarch, int space_flag)
552 if (space_flag & TYPE_INSTANCE_FLAG_CODE_SPACE)
554 else if (space_flag & TYPE_INSTANCE_FLAG_DATA_SPACE)
556 else if ((space_flag & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
557 && gdbarch_address_class_type_flags_to_name_p (gdbarch))
558 return gdbarch_address_class_type_flags_to_name (gdbarch, space_flag);
563 /* Create a new type with instance flags NEW_FLAGS, based on TYPE.
565 If STORAGE is non-NULL, create the new type instance there.
566 STORAGE must be in the same obstack as TYPE. */
569 make_qualified_type (struct type *type, int new_flags,
570 struct type *storage)
577 if (TYPE_INSTANCE_FLAGS (ntype) == new_flags)
579 ntype = TYPE_CHAIN (ntype);
581 while (ntype != type);
583 /* Create a new type instance. */
585 ntype = alloc_type_instance (type);
588 /* If STORAGE was provided, it had better be in the same objfile
589 as TYPE. Otherwise, we can't link it into TYPE's cv chain:
590 if one objfile is freed and the other kept, we'd have
591 dangling pointers. */
592 gdb_assert (TYPE_OBJFILE (type) == TYPE_OBJFILE (storage));
595 TYPE_MAIN_TYPE (ntype) = TYPE_MAIN_TYPE (type);
596 TYPE_CHAIN (ntype) = ntype;
599 /* Pointers or references to the original type are not relevant to
601 TYPE_POINTER_TYPE (ntype) = (struct type *) 0;
602 TYPE_REFERENCE_TYPE (ntype) = (struct type *) 0;
604 /* Chain the new qualified type to the old type. */
605 TYPE_CHAIN (ntype) = TYPE_CHAIN (type);
606 TYPE_CHAIN (type) = ntype;
608 /* Now set the instance flags and return the new type. */
609 TYPE_INSTANCE_FLAGS (ntype) = new_flags;
611 /* Set length of new type to that of the original type. */
612 TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
617 /* Make an address-space-delimited variant of a type -- a type that
618 is identical to the one supplied except that it has an address
619 space attribute attached to it (such as "code" or "data").
621 The space attributes "code" and "data" are for Harvard
622 architectures. The address space attributes are for architectures
623 which have alternately sized pointers or pointers with alternate
627 make_type_with_address_space (struct type *type, int space_flag)
629 int new_flags = ((TYPE_INSTANCE_FLAGS (type)
630 & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
631 | TYPE_INSTANCE_FLAG_DATA_SPACE
632 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL))
635 return make_qualified_type (type, new_flags, NULL);
638 /* Make a "c-v" variant of a type -- a type that is identical to the
639 one supplied except that it may have const or volatile attributes
640 CNST is a flag for setting the const attribute
641 VOLTL is a flag for setting the volatile attribute
642 TYPE is the base type whose variant we are creating.
644 If TYPEPTR and *TYPEPTR are non-zero, then *TYPEPTR points to
645 storage to hold the new qualified type; *TYPEPTR and TYPE must be
646 in the same objfile. Otherwise, allocate fresh memory for the new
647 type whereever TYPE lives. If TYPEPTR is non-zero, set it to the
648 new type we construct. */
651 make_cv_type (int cnst, int voltl,
653 struct type **typeptr)
655 struct type *ntype; /* New type */
657 int new_flags = (TYPE_INSTANCE_FLAGS (type)
658 & ~(TYPE_INSTANCE_FLAG_CONST
659 | TYPE_INSTANCE_FLAG_VOLATILE));
662 new_flags |= TYPE_INSTANCE_FLAG_CONST;
665 new_flags |= TYPE_INSTANCE_FLAG_VOLATILE;
667 if (typeptr && *typeptr != NULL)
669 /* TYPE and *TYPEPTR must be in the same objfile. We can't have
670 a C-V variant chain that threads across objfiles: if one
671 objfile gets freed, then the other has a broken C-V chain.
673 This code used to try to copy over the main type from TYPE to
674 *TYPEPTR if they were in different objfiles, but that's
675 wrong, too: TYPE may have a field list or member function
676 lists, which refer to types of their own, etc. etc. The
677 whole shebang would need to be copied over recursively; you
678 can't have inter-objfile pointers. The only thing to do is
679 to leave stub types as stub types, and look them up afresh by
680 name each time you encounter them. */
681 gdb_assert (TYPE_OBJFILE (*typeptr) == TYPE_OBJFILE (type));
684 ntype = make_qualified_type (type, new_flags,
685 typeptr ? *typeptr : NULL);
693 /* Make a 'restrict'-qualified version of TYPE. */
696 make_restrict_type (struct type *type)
698 return make_qualified_type (type,
699 (TYPE_INSTANCE_FLAGS (type)
700 | TYPE_INSTANCE_FLAG_RESTRICT),
704 /* Make a type without const, volatile, or restrict. */
707 make_unqualified_type (struct type *type)
709 return make_qualified_type (type,
710 (TYPE_INSTANCE_FLAGS (type)
711 & ~(TYPE_INSTANCE_FLAG_CONST
712 | TYPE_INSTANCE_FLAG_VOLATILE
713 | TYPE_INSTANCE_FLAG_RESTRICT)),
717 /* Make a '_Atomic'-qualified version of TYPE. */
720 make_atomic_type (struct type *type)
722 return make_qualified_type (type,
723 (TYPE_INSTANCE_FLAGS (type)
724 | TYPE_INSTANCE_FLAG_ATOMIC),
728 /* Replace the contents of ntype with the type *type. This changes the
729 contents, rather than the pointer for TYPE_MAIN_TYPE (ntype); thus
730 the changes are propogated to all types in the TYPE_CHAIN.
732 In order to build recursive types, it's inevitable that we'll need
733 to update types in place --- but this sort of indiscriminate
734 smashing is ugly, and needs to be replaced with something more
735 controlled. TYPE_MAIN_TYPE is a step in this direction; it's not
736 clear if more steps are needed. */
739 replace_type (struct type *ntype, struct type *type)
743 /* These two types had better be in the same objfile. Otherwise,
744 the assignment of one type's main type structure to the other
745 will produce a type with references to objects (names; field
746 lists; etc.) allocated on an objfile other than its own. */
747 gdb_assert (TYPE_OBJFILE (ntype) == TYPE_OBJFILE (ntype));
749 *TYPE_MAIN_TYPE (ntype) = *TYPE_MAIN_TYPE (type);
751 /* The type length is not a part of the main type. Update it for
752 each type on the variant chain. */
756 /* Assert that this element of the chain has no address-class bits
757 set in its flags. Such type variants might have type lengths
758 which are supposed to be different from the non-address-class
759 variants. This assertion shouldn't ever be triggered because
760 symbol readers which do construct address-class variants don't
761 call replace_type(). */
762 gdb_assert (TYPE_ADDRESS_CLASS_ALL (chain) == 0);
764 TYPE_LENGTH (chain) = TYPE_LENGTH (type);
765 chain = TYPE_CHAIN (chain);
767 while (ntype != chain);
769 /* Assert that the two types have equivalent instance qualifiers.
770 This should be true for at least all of our debug readers. */
771 gdb_assert (TYPE_INSTANCE_FLAGS (ntype) == TYPE_INSTANCE_FLAGS (type));
774 /* Implement direct support for MEMBER_TYPE in GNU C++.
775 May need to construct such a type if this is the first use.
776 The TYPE is the type of the member. The DOMAIN is the type
777 of the aggregate that the member belongs to. */
780 lookup_memberptr_type (struct type *type, struct type *domain)
784 mtype = alloc_type_copy (type);
785 smash_to_memberptr_type (mtype, domain, type);
789 /* Return a pointer-to-method type, for a method of type TO_TYPE. */
792 lookup_methodptr_type (struct type *to_type)
796 mtype = alloc_type_copy (to_type);
797 smash_to_methodptr_type (mtype, to_type);
801 /* Allocate a stub method whose return type is TYPE. This apparently
802 happens for speed of symbol reading, since parsing out the
803 arguments to the method is cpu-intensive, the way we are doing it.
804 So, we will fill in arguments later. This always returns a fresh
808 allocate_stub_method (struct type *type)
812 mtype = alloc_type_copy (type);
813 TYPE_CODE (mtype) = TYPE_CODE_METHOD;
814 TYPE_LENGTH (mtype) = 1;
815 TYPE_STUB (mtype) = 1;
816 TYPE_TARGET_TYPE (mtype) = type;
817 /* TYPE_SELF_TYPE (mtype) = unknown yet */
821 /* Create a range type with a dynamic range from LOW_BOUND to
822 HIGH_BOUND, inclusive. See create_range_type for further details. */
825 create_range_type (struct type *result_type, struct type *index_type,
826 const struct dynamic_prop *low_bound,
827 const struct dynamic_prop *high_bound)
829 if (result_type == NULL)
830 result_type = alloc_type_copy (index_type);
831 TYPE_CODE (result_type) = TYPE_CODE_RANGE;
832 TYPE_TARGET_TYPE (result_type) = index_type;
833 if (TYPE_STUB (index_type))
834 TYPE_TARGET_STUB (result_type) = 1;
836 TYPE_LENGTH (result_type) = TYPE_LENGTH (check_typedef (index_type));
838 TYPE_RANGE_DATA (result_type) = (struct range_bounds *)
839 TYPE_ZALLOC (result_type, sizeof (struct range_bounds));
840 TYPE_RANGE_DATA (result_type)->low = *low_bound;
841 TYPE_RANGE_DATA (result_type)->high = *high_bound;
843 if (low_bound->kind == PROP_CONST && low_bound->data.const_val >= 0)
844 TYPE_UNSIGNED (result_type) = 1;
846 /* Ada allows the declaration of range types whose upper bound is
847 less than the lower bound, so checking the lower bound is not
848 enough. Make sure we do not mark a range type whose upper bound
849 is negative as unsigned. */
850 if (high_bound->kind == PROP_CONST && high_bound->data.const_val < 0)
851 TYPE_UNSIGNED (result_type) = 0;
856 /* Create a range type using either a blank type supplied in
857 RESULT_TYPE, or creating a new type, inheriting the objfile from
860 Indices will be of type INDEX_TYPE, and will range from LOW_BOUND
861 to HIGH_BOUND, inclusive.
863 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
864 sure it is TYPE_CODE_UNDEF before we bash it into a range type? */
867 create_static_range_type (struct type *result_type, struct type *index_type,
868 LONGEST low_bound, LONGEST high_bound)
870 struct dynamic_prop low, high;
872 low.kind = PROP_CONST;
873 low.data.const_val = low_bound;
875 high.kind = PROP_CONST;
876 high.data.const_val = high_bound;
878 result_type = create_range_type (result_type, index_type, &low, &high);
883 /* Predicate tests whether BOUNDS are static. Returns 1 if all bounds values
884 are static, otherwise returns 0. */
887 has_static_range (const struct range_bounds *bounds)
889 return (bounds->low.kind == PROP_CONST
890 && bounds->high.kind == PROP_CONST);
894 /* Set *LOWP and *HIGHP to the lower and upper bounds of discrete type
895 TYPE. Return 1 if type is a range type, 0 if it is discrete (and
896 bounds will fit in LONGEST), or -1 otherwise. */
899 get_discrete_bounds (struct type *type, LONGEST *lowp, LONGEST *highp)
901 CHECK_TYPEDEF (type);
902 switch (TYPE_CODE (type))
904 case TYPE_CODE_RANGE:
905 *lowp = TYPE_LOW_BOUND (type);
906 *highp = TYPE_HIGH_BOUND (type);
909 if (TYPE_NFIELDS (type) > 0)
911 /* The enums may not be sorted by value, so search all
915 *lowp = *highp = TYPE_FIELD_ENUMVAL (type, 0);
916 for (i = 0; i < TYPE_NFIELDS (type); i++)
918 if (TYPE_FIELD_ENUMVAL (type, i) < *lowp)
919 *lowp = TYPE_FIELD_ENUMVAL (type, i);
920 if (TYPE_FIELD_ENUMVAL (type, i) > *highp)
921 *highp = TYPE_FIELD_ENUMVAL (type, i);
924 /* Set unsigned indicator if warranted. */
927 TYPE_UNSIGNED (type) = 1;
941 if (TYPE_LENGTH (type) > sizeof (LONGEST)) /* Too big */
943 if (!TYPE_UNSIGNED (type))
945 *lowp = -(1 << (TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1));
949 /* ... fall through for unsigned ints ... */
952 /* This round-about calculation is to avoid shifting by
953 TYPE_LENGTH (type) * TARGET_CHAR_BIT, which will not work
954 if TYPE_LENGTH (type) == sizeof (LONGEST). */
955 *highp = 1 << (TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1);
956 *highp = (*highp - 1) | *highp;
963 /* Assuming TYPE is a simple, non-empty array type, compute its upper
964 and lower bound. Save the low bound into LOW_BOUND if not NULL.
965 Save the high bound into HIGH_BOUND if not NULL.
967 Return 1 if the operation was successful. Return zero otherwise,
968 in which case the values of LOW_BOUND and HIGH_BOUNDS are unmodified.
970 We now simply use get_discrete_bounds call to get the values
971 of the low and high bounds.
972 get_discrete_bounds can return three values:
973 1, meaning that index is a range,
974 0, meaning that index is a discrete type,
975 or -1 for failure. */
978 get_array_bounds (struct type *type, LONGEST *low_bound, LONGEST *high_bound)
980 struct type *index = TYPE_INDEX_TYPE (type);
988 res = get_discrete_bounds (index, &low, &high);
992 /* Check if the array bounds are undefined. */
994 && ((low_bound && TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
995 || (high_bound && TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))))
1007 /* Create an array type using either a blank type supplied in
1008 RESULT_TYPE, or creating a new type, inheriting the objfile from
1011 Elements will be of type ELEMENT_TYPE, the indices will be of type
1014 If BIT_STRIDE is not zero, build a packed array type whose element
1015 size is BIT_STRIDE. Otherwise, ignore this parameter.
1017 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1018 sure it is TYPE_CODE_UNDEF before we bash it into an array
1022 create_array_type_with_stride (struct type *result_type,
1023 struct type *element_type,
1024 struct type *range_type,
1025 unsigned int bit_stride)
1027 if (result_type == NULL)
1028 result_type = alloc_type_copy (range_type);
1030 TYPE_CODE (result_type) = TYPE_CODE_ARRAY;
1031 TYPE_TARGET_TYPE (result_type) = element_type;
1032 if (has_static_range (TYPE_RANGE_DATA (range_type)))
1034 LONGEST low_bound, high_bound;
1036 if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0)
1037 low_bound = high_bound = 0;
1038 CHECK_TYPEDEF (element_type);
1039 /* Be careful when setting the array length. Ada arrays can be
1040 empty arrays with the high_bound being smaller than the low_bound.
1041 In such cases, the array length should be zero. */
1042 if (high_bound < low_bound)
1043 TYPE_LENGTH (result_type) = 0;
1044 else if (bit_stride > 0)
1045 TYPE_LENGTH (result_type) =
1046 (bit_stride * (high_bound - low_bound + 1) + 7) / 8;
1048 TYPE_LENGTH (result_type) =
1049 TYPE_LENGTH (element_type) * (high_bound - low_bound + 1);
1053 /* This type is dynamic and its length needs to be computed
1054 on demand. In the meantime, avoid leaving the TYPE_LENGTH
1055 undefined by setting it to zero. Although we are not expected
1056 to trust TYPE_LENGTH in this case, setting the size to zero
1057 allows us to avoid allocating objects of random sizes in case
1058 we accidently do. */
1059 TYPE_LENGTH (result_type) = 0;
1062 TYPE_NFIELDS (result_type) = 1;
1063 TYPE_FIELDS (result_type) =
1064 (struct field *) TYPE_ZALLOC (result_type, sizeof (struct field));
1065 TYPE_INDEX_TYPE (result_type) = range_type;
1067 TYPE_FIELD_BITSIZE (result_type, 0) = bit_stride;
1069 /* TYPE_FLAG_TARGET_STUB will take care of zero length arrays. */
1070 if (TYPE_LENGTH (result_type) == 0)
1071 TYPE_TARGET_STUB (result_type) = 1;
1076 /* Same as create_array_type_with_stride but with no bit_stride
1077 (BIT_STRIDE = 0), thus building an unpacked array. */
1080 create_array_type (struct type *result_type,
1081 struct type *element_type,
1082 struct type *range_type)
1084 return create_array_type_with_stride (result_type, element_type,
1089 lookup_array_range_type (struct type *element_type,
1090 LONGEST low_bound, LONGEST high_bound)
1092 struct gdbarch *gdbarch = get_type_arch (element_type);
1093 struct type *index_type = builtin_type (gdbarch)->builtin_int;
1094 struct type *range_type
1095 = create_static_range_type (NULL, index_type, low_bound, high_bound);
1097 return create_array_type (NULL, element_type, range_type);
1100 /* Create a string type using either a blank type supplied in
1101 RESULT_TYPE, or creating a new type. String types are similar
1102 enough to array of char types that we can use create_array_type to
1103 build the basic type and then bash it into a string type.
1105 For fixed length strings, the range type contains 0 as the lower
1106 bound and the length of the string minus one as the upper bound.
1108 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1109 sure it is TYPE_CODE_UNDEF before we bash it into a string
1113 create_string_type (struct type *result_type,
1114 struct type *string_char_type,
1115 struct type *range_type)
1117 result_type = create_array_type (result_type,
1120 TYPE_CODE (result_type) = TYPE_CODE_STRING;
1125 lookup_string_range_type (struct type *string_char_type,
1126 LONGEST low_bound, LONGEST high_bound)
1128 struct type *result_type;
1130 result_type = lookup_array_range_type (string_char_type,
1131 low_bound, high_bound);
1132 TYPE_CODE (result_type) = TYPE_CODE_STRING;
1137 create_set_type (struct type *result_type, struct type *domain_type)
1139 if (result_type == NULL)
1140 result_type = alloc_type_copy (domain_type);
1142 TYPE_CODE (result_type) = TYPE_CODE_SET;
1143 TYPE_NFIELDS (result_type) = 1;
1144 TYPE_FIELDS (result_type) = TYPE_ZALLOC (result_type, sizeof (struct field));
1146 if (!TYPE_STUB (domain_type))
1148 LONGEST low_bound, high_bound, bit_length;
1150 if (get_discrete_bounds (domain_type, &low_bound, &high_bound) < 0)
1151 low_bound = high_bound = 0;
1152 bit_length = high_bound - low_bound + 1;
1153 TYPE_LENGTH (result_type)
1154 = (bit_length + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
1156 TYPE_UNSIGNED (result_type) = 1;
1158 TYPE_FIELD_TYPE (result_type, 0) = domain_type;
1163 /* Convert ARRAY_TYPE to a vector type. This may modify ARRAY_TYPE
1164 and any array types nested inside it. */
1167 make_vector_type (struct type *array_type)
1169 struct type *inner_array, *elt_type;
1172 /* Find the innermost array type, in case the array is
1173 multi-dimensional. */
1174 inner_array = array_type;
1175 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY)
1176 inner_array = TYPE_TARGET_TYPE (inner_array);
1178 elt_type = TYPE_TARGET_TYPE (inner_array);
1179 if (TYPE_CODE (elt_type) == TYPE_CODE_INT)
1181 flags = TYPE_INSTANCE_FLAGS (elt_type) | TYPE_INSTANCE_FLAG_NOTTEXT;
1182 elt_type = make_qualified_type (elt_type, flags, NULL);
1183 TYPE_TARGET_TYPE (inner_array) = elt_type;
1186 TYPE_VECTOR (array_type) = 1;
1190 init_vector_type (struct type *elt_type, int n)
1192 struct type *array_type;
1194 array_type = lookup_array_range_type (elt_type, 0, n - 1);
1195 make_vector_type (array_type);
1199 /* Internal routine called by TYPE_SELF_TYPE to return the type that TYPE
1200 belongs to. In c++ this is the class of "this", but TYPE_THIS_TYPE is too
1201 confusing. "self" is a common enough replacement for "this".
1202 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1203 TYPE_CODE_METHOD. */
1206 internal_type_self_type (struct type *type)
1208 switch (TYPE_CODE (type))
1210 case TYPE_CODE_METHODPTR:
1211 case TYPE_CODE_MEMBERPTR:
1212 if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_NONE)
1214 gdb_assert (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_SELF_TYPE);
1215 return TYPE_MAIN_TYPE (type)->type_specific.self_type;
1216 case TYPE_CODE_METHOD:
1217 if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_NONE)
1219 gdb_assert (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_FUNC);
1220 return TYPE_MAIN_TYPE (type)->type_specific.func_stuff->self_type;
1222 gdb_assert_not_reached ("bad type");
1226 /* Set the type of the class that TYPE belongs to.
1227 In c++ this is the class of "this".
1228 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1229 TYPE_CODE_METHOD. */
1232 set_type_self_type (struct type *type, struct type *self_type)
1234 switch (TYPE_CODE (type))
1236 case TYPE_CODE_METHODPTR:
1237 case TYPE_CODE_MEMBERPTR:
1238 if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_NONE)
1239 TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_SELF_TYPE;
1240 gdb_assert (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_SELF_TYPE);
1241 TYPE_MAIN_TYPE (type)->type_specific.self_type = self_type;
1243 case TYPE_CODE_METHOD:
1244 if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_NONE)
1245 INIT_FUNC_SPECIFIC (type);
1246 gdb_assert (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_FUNC);
1247 TYPE_MAIN_TYPE (type)->type_specific.func_stuff->self_type = self_type;
1250 gdb_assert_not_reached ("bad type");
1254 /* Smash TYPE to be a type of pointers to members of SELF_TYPE with type
1255 TO_TYPE. A member pointer is a wierd thing -- it amounts to a
1256 typed offset into a struct, e.g. "an int at offset 8". A MEMBER
1257 TYPE doesn't include the offset (that's the value of the MEMBER
1258 itself), but does include the structure type into which it points
1261 When "smashing" the type, we preserve the objfile that the old type
1262 pointed to, since we aren't changing where the type is actually
1266 smash_to_memberptr_type (struct type *type, struct type *self_type,
1267 struct type *to_type)
1270 TYPE_CODE (type) = TYPE_CODE_MEMBERPTR;
1271 TYPE_TARGET_TYPE (type) = to_type;
1272 set_type_self_type (type, self_type);
1273 /* Assume that a data member pointer is the same size as a normal
1276 = gdbarch_ptr_bit (get_type_arch (to_type)) / TARGET_CHAR_BIT;
1279 /* Smash TYPE to be a type of pointer to methods type TO_TYPE.
1281 When "smashing" the type, we preserve the objfile that the old type
1282 pointed to, since we aren't changing where the type is actually
1286 smash_to_methodptr_type (struct type *type, struct type *to_type)
1289 TYPE_CODE (type) = TYPE_CODE_METHODPTR;
1290 TYPE_TARGET_TYPE (type) = to_type;
1291 set_type_self_type (type, TYPE_SELF_TYPE (to_type));
1292 TYPE_LENGTH (type) = cplus_method_ptr_size (to_type);
1295 /* Smash TYPE to be a type of method of SELF_TYPE with type TO_TYPE.
1296 METHOD just means `function that gets an extra "this" argument'.
1298 When "smashing" the type, we preserve the objfile that the old type
1299 pointed to, since we aren't changing where the type is actually
1303 smash_to_method_type (struct type *type, struct type *self_type,
1304 struct type *to_type, struct field *args,
1305 int nargs, int varargs)
1308 TYPE_CODE (type) = TYPE_CODE_METHOD;
1309 TYPE_TARGET_TYPE (type) = to_type;
1310 set_type_self_type (type, self_type);
1311 TYPE_FIELDS (type) = args;
1312 TYPE_NFIELDS (type) = nargs;
1314 TYPE_VARARGS (type) = 1;
1315 TYPE_LENGTH (type) = 1; /* In practice, this is never needed. */
1318 /* Return a typename for a struct/union/enum type without "struct ",
1319 "union ", or "enum ". If the type has a NULL name, return NULL. */
1322 type_name_no_tag (const struct type *type)
1324 if (TYPE_TAG_NAME (type) != NULL)
1325 return TYPE_TAG_NAME (type);
1327 /* Is there code which expects this to return the name if there is
1328 no tag name? My guess is that this is mainly used for C++ in
1329 cases where the two will always be the same. */
1330 return TYPE_NAME (type);
1333 /* A wrapper of type_name_no_tag which calls error if the type is anonymous.
1334 Since GCC PR debug/47510 DWARF provides associated information to detect the
1335 anonymous class linkage name from its typedef.
1337 Parameter TYPE should not yet have CHECK_TYPEDEF applied, this function will
1341 type_name_no_tag_or_error (struct type *type)
1343 struct type *saved_type = type;
1345 struct objfile *objfile;
1347 CHECK_TYPEDEF (type);
1349 name = type_name_no_tag (type);
1353 name = type_name_no_tag (saved_type);
1354 objfile = TYPE_OBJFILE (saved_type);
1355 error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
1356 name ? name : "<anonymous>",
1357 objfile ? objfile_name (objfile) : "<arch>");
1360 /* Lookup a typedef or primitive type named NAME, visible in lexical
1361 block BLOCK. If NOERR is nonzero, return zero if NAME is not
1362 suitably defined. */
1365 lookup_typename (const struct language_defn *language,
1366 struct gdbarch *gdbarch, const char *name,
1367 const struct block *block, int noerr)
1372 sym = lookup_symbol_in_language (name, block, VAR_DOMAIN,
1373 language->la_language, NULL);
1374 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1375 return SYMBOL_TYPE (sym);
1379 error (_("No type named %s."), name);
1383 lookup_unsigned_typename (const struct language_defn *language,
1384 struct gdbarch *gdbarch, const char *name)
1386 char *uns = alloca (strlen (name) + 10);
1388 strcpy (uns, "unsigned ");
1389 strcpy (uns + 9, name);
1390 return lookup_typename (language, gdbarch, uns, (struct block *) NULL, 0);
1394 lookup_signed_typename (const struct language_defn *language,
1395 struct gdbarch *gdbarch, const char *name)
1398 char *uns = alloca (strlen (name) + 8);
1400 strcpy (uns, "signed ");
1401 strcpy (uns + 7, name);
1402 t = lookup_typename (language, gdbarch, uns, (struct block *) NULL, 1);
1403 /* If we don't find "signed FOO" just try again with plain "FOO". */
1406 return lookup_typename (language, gdbarch, name, (struct block *) NULL, 0);
1409 /* Lookup a structure type named "struct NAME",
1410 visible in lexical block BLOCK. */
1413 lookup_struct (const char *name, const struct block *block)
1417 sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
1421 error (_("No struct type named %s."), name);
1423 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
1425 error (_("This context has class, union or enum %s, not a struct."),
1428 return (SYMBOL_TYPE (sym));
1431 /* Lookup a union type named "union NAME",
1432 visible in lexical block BLOCK. */
1435 lookup_union (const char *name, const struct block *block)
1440 sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
1443 error (_("No union type named %s."), name);
1445 t = SYMBOL_TYPE (sym);
1447 if (TYPE_CODE (t) == TYPE_CODE_UNION)
1450 /* If we get here, it's not a union. */
1451 error (_("This context has class, struct or enum %s, not a union."),
1455 /* Lookup an enum type named "enum NAME",
1456 visible in lexical block BLOCK. */
1459 lookup_enum (const char *name, const struct block *block)
1463 sym = lookup_symbol (name, block, STRUCT_DOMAIN, 0);
1466 error (_("No enum type named %s."), name);
1468 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_ENUM)
1470 error (_("This context has class, struct or union %s, not an enum."),
1473 return (SYMBOL_TYPE (sym));
1476 /* Lookup a template type named "template NAME<TYPE>",
1477 visible in lexical block BLOCK. */
1480 lookup_template_type (char *name, struct type *type,
1481 const struct block *block)
1484 char *nam = (char *)
1485 alloca (strlen (name) + strlen (TYPE_NAME (type)) + 4);
1489 strcat (nam, TYPE_NAME (type));
1490 strcat (nam, " >"); /* FIXME, extra space still introduced in gcc? */
1492 sym = lookup_symbol (nam, block, VAR_DOMAIN, 0);
1496 error (_("No template type named %s."), name);
1498 if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
1500 error (_("This context has class, union or enum %s, not a struct."),
1503 return (SYMBOL_TYPE (sym));
1506 /* Given a type TYPE, lookup the type of the component of type named
1509 TYPE can be either a struct or union, or a pointer or reference to
1510 a struct or union. If it is a pointer or reference, its target
1511 type is automatically used. Thus '.' and '->' are interchangable,
1512 as specified for the definitions of the expression element types
1513 STRUCTOP_STRUCT and STRUCTOP_PTR.
1515 If NOERR is nonzero, return zero if NAME is not suitably defined.
1516 If NAME is the name of a baseclass type, return that type. */
1519 lookup_struct_elt_type (struct type *type, const char *name, int noerr)
1526 CHECK_TYPEDEF (type);
1527 if (TYPE_CODE (type) != TYPE_CODE_PTR
1528 && TYPE_CODE (type) != TYPE_CODE_REF)
1530 type = TYPE_TARGET_TYPE (type);
1533 if (TYPE_CODE (type) != TYPE_CODE_STRUCT
1534 && TYPE_CODE (type) != TYPE_CODE_UNION)
1536 type_name = type_to_string (type);
1537 make_cleanup (xfree, type_name);
1538 error (_("Type %s is not a structure or union type."), type_name);
1542 /* FIXME: This change put in by Michael seems incorrect for the case
1543 where the structure tag name is the same as the member name.
1544 I.e. when doing "ptype bell->bar" for "struct foo { int bar; int
1545 foo; } bell;" Disabled by fnf. */
1549 type_name = type_name_no_tag (type);
1550 if (type_name != NULL && strcmp (type_name, name) == 0)
1555 for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
1557 const char *t_field_name = TYPE_FIELD_NAME (type, i);
1559 if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
1561 return TYPE_FIELD_TYPE (type, i);
1563 else if (!t_field_name || *t_field_name == '\0')
1565 struct type *subtype
1566 = lookup_struct_elt_type (TYPE_FIELD_TYPE (type, i), name, 1);
1568 if (subtype != NULL)
1573 /* OK, it's not in this class. Recursively check the baseclasses. */
1574 for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
1578 t = lookup_struct_elt_type (TYPE_BASECLASS (type, i), name, 1);
1590 type_name = type_to_string (type);
1591 make_cleanup (xfree, type_name);
1592 error (_("Type %s has no component named %s."), type_name, name);
1595 /* Store in *MAX the largest number representable by unsigned integer type
1599 get_unsigned_type_max (struct type *type, ULONGEST *max)
1603 CHECK_TYPEDEF (type);
1604 gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && TYPE_UNSIGNED (type));
1605 gdb_assert (TYPE_LENGTH (type) <= sizeof (ULONGEST));
1607 /* Written this way to avoid overflow. */
1608 n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
1609 *max = ((((ULONGEST) 1 << (n - 1)) - 1) << 1) | 1;
1612 /* Store in *MIN, *MAX the smallest and largest numbers representable by
1613 signed integer type TYPE. */
1616 get_signed_type_minmax (struct type *type, LONGEST *min, LONGEST *max)
1620 CHECK_TYPEDEF (type);
1621 gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && !TYPE_UNSIGNED (type));
1622 gdb_assert (TYPE_LENGTH (type) <= sizeof (LONGEST));
1624 n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
1625 *min = -((ULONGEST) 1 << (n - 1));
1626 *max = ((ULONGEST) 1 << (n - 1)) - 1;
1629 /* Internal routine called by TYPE_VPTR_FIELDNO to return the value of
1630 cplus_stuff.vptr_fieldno.
1632 cplus_stuff is initialized to cplus_struct_default which does not
1633 set vptr_fieldno to -1 for portability reasons (IWBN to use C99
1634 designated initializers). We cope with that here. */
1637 internal_type_vptr_fieldno (struct type *type)
1639 CHECK_TYPEDEF (type);
1640 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1641 || TYPE_CODE (type) == TYPE_CODE_UNION);
1642 if (!HAVE_CPLUS_STRUCT (type))
1644 return TYPE_RAW_CPLUS_SPECIFIC (type)->vptr_fieldno;
1647 /* Set the value of cplus_stuff.vptr_fieldno. */
1650 set_type_vptr_fieldno (struct type *type, int fieldno)
1652 CHECK_TYPEDEF (type);
1653 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1654 || TYPE_CODE (type) == TYPE_CODE_UNION);
1655 if (!HAVE_CPLUS_STRUCT (type))
1656 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1657 TYPE_RAW_CPLUS_SPECIFIC (type)->vptr_fieldno = fieldno;
1660 /* Internal routine called by TYPE_VPTR_BASETYPE to return the value of
1661 cplus_stuff.vptr_basetype. */
1664 internal_type_vptr_basetype (struct type *type)
1666 CHECK_TYPEDEF (type);
1667 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1668 || TYPE_CODE (type) == TYPE_CODE_UNION);
1669 gdb_assert (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_CPLUS_STUFF);
1670 return TYPE_RAW_CPLUS_SPECIFIC (type)->vptr_basetype;
1673 /* Set the value of cplus_stuff.vptr_basetype. */
1676 set_type_vptr_basetype (struct type *type, struct type *basetype)
1678 CHECK_TYPEDEF (type);
1679 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
1680 || TYPE_CODE (type) == TYPE_CODE_UNION);
1681 if (!HAVE_CPLUS_STRUCT (type))
1682 ALLOCATE_CPLUS_STRUCT_TYPE (type);
1683 TYPE_RAW_CPLUS_SPECIFIC (type)->vptr_basetype = basetype;
1686 /* Lookup the vptr basetype/fieldno values for TYPE.
1687 If found store vptr_basetype in *BASETYPEP if non-NULL, and return
1688 vptr_fieldno. Also, if found and basetype is from the same objfile,
1690 If not found, return -1 and ignore BASETYPEP.
1691 Callers should be aware that in some cases (for example,
1692 the type or one of its baseclasses is a stub type and we are
1693 debugging a .o file, or the compiler uses DWARF-2 and is not GCC),
1694 this function will not be able to find the
1695 virtual function table pointer, and vptr_fieldno will remain -1 and
1696 vptr_basetype will remain NULL or incomplete. */
1699 get_vptr_fieldno (struct type *type, struct type **basetypep)
1701 CHECK_TYPEDEF (type);
1703 if (TYPE_VPTR_FIELDNO (type) < 0)
1707 /* We must start at zero in case the first (and only) baseclass
1708 is virtual (and hence we cannot share the table pointer). */
1709 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
1711 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
1713 struct type *basetype;
1715 fieldno = get_vptr_fieldno (baseclass, &basetype);
1718 /* If the type comes from a different objfile we can't cache
1719 it, it may have a different lifetime. PR 2384 */
1720 if (TYPE_OBJFILE (type) == TYPE_OBJFILE (basetype))
1722 set_type_vptr_fieldno (type, fieldno);
1723 set_type_vptr_basetype (type, basetype);
1726 *basetypep = basetype;
1737 *basetypep = TYPE_VPTR_BASETYPE (type);
1738 return TYPE_VPTR_FIELDNO (type);
1743 stub_noname_complaint (void)
1745 complaint (&symfile_complaints, _("stub type has NULL name"));
1748 /* Worker for is_dynamic_type. */
1751 is_dynamic_type_internal (struct type *type, int top_level)
1753 type = check_typedef (type);
1755 /* We only want to recognize references at the outermost level. */
1756 if (top_level && TYPE_CODE (type) == TYPE_CODE_REF)
1757 type = check_typedef (TYPE_TARGET_TYPE (type));
1759 /* Types that have a dynamic TYPE_DATA_LOCATION are considered
1760 dynamic, even if the type itself is statically defined.
1761 From a user's point of view, this may appear counter-intuitive;
1762 but it makes sense in this context, because the point is to determine
1763 whether any part of the type needs to be resolved before it can
1765 if (TYPE_DATA_LOCATION (type) != NULL
1766 && (TYPE_DATA_LOCATION_KIND (type) == PROP_LOCEXPR
1767 || TYPE_DATA_LOCATION_KIND (type) == PROP_LOCLIST))
1770 switch (TYPE_CODE (type))
1772 case TYPE_CODE_RANGE:
1774 /* A range type is obviously dynamic if it has at least one
1775 dynamic bound. But also consider the range type to be
1776 dynamic when its subtype is dynamic, even if the bounds
1777 of the range type are static. It allows us to assume that
1778 the subtype of a static range type is also static. */
1779 return (!has_static_range (TYPE_RANGE_DATA (type))
1780 || is_dynamic_type_internal (TYPE_TARGET_TYPE (type), 0));
1783 case TYPE_CODE_ARRAY:
1785 gdb_assert (TYPE_NFIELDS (type) == 1);
1787 /* The array is dynamic if either the bounds are dynamic,
1788 or the elements it contains have a dynamic contents. */
1789 if (is_dynamic_type_internal (TYPE_INDEX_TYPE (type), 0))
1791 return is_dynamic_type_internal (TYPE_TARGET_TYPE (type), 0);
1794 case TYPE_CODE_STRUCT:
1795 case TYPE_CODE_UNION:
1799 for (i = 0; i < TYPE_NFIELDS (type); ++i)
1800 if (!field_is_static (&TYPE_FIELD (type, i))
1801 && is_dynamic_type_internal (TYPE_FIELD_TYPE (type, i), 0))
1810 /* See gdbtypes.h. */
1813 is_dynamic_type (struct type *type)
1815 return is_dynamic_type_internal (type, 1);
1818 static struct type *resolve_dynamic_type_internal
1819 (struct type *type, struct property_addr_info *addr_stack, int top_level);
1821 /* Given a dynamic range type (dyn_range_type) and a stack of
1822 struct property_addr_info elements, return a static version
1825 static struct type *
1826 resolve_dynamic_range (struct type *dyn_range_type,
1827 struct property_addr_info *addr_stack)
1830 struct type *static_range_type, *static_target_type;
1831 const struct dynamic_prop *prop;
1832 const struct dwarf2_locexpr_baton *baton;
1833 struct dynamic_prop low_bound, high_bound;
1835 gdb_assert (TYPE_CODE (dyn_range_type) == TYPE_CODE_RANGE);
1837 prop = &TYPE_RANGE_DATA (dyn_range_type)->low;
1838 if (dwarf2_evaluate_property (prop, addr_stack, &value))
1840 low_bound.kind = PROP_CONST;
1841 low_bound.data.const_val = value;
1845 low_bound.kind = PROP_UNDEFINED;
1846 low_bound.data.const_val = 0;
1849 prop = &TYPE_RANGE_DATA (dyn_range_type)->high;
1850 if (dwarf2_evaluate_property (prop, addr_stack, &value))
1852 high_bound.kind = PROP_CONST;
1853 high_bound.data.const_val = value;
1855 if (TYPE_RANGE_DATA (dyn_range_type)->flag_upper_bound_is_count)
1856 high_bound.data.const_val
1857 = low_bound.data.const_val + high_bound.data.const_val - 1;
1861 high_bound.kind = PROP_UNDEFINED;
1862 high_bound.data.const_val = 0;
1866 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (dyn_range_type),
1868 static_range_type = create_range_type (copy_type (dyn_range_type),
1870 &low_bound, &high_bound);
1871 TYPE_RANGE_DATA (static_range_type)->flag_bound_evaluated = 1;
1872 return static_range_type;
1875 /* Resolves dynamic bound values of an array type TYPE to static ones.
1876 ADDR_STACK is a stack of struct property_addr_info to be used
1877 if needed during the dynamic resolution. */
1879 static struct type *
1880 resolve_dynamic_array (struct type *type,
1881 struct property_addr_info *addr_stack)
1884 struct type *elt_type;
1885 struct type *range_type;
1886 struct type *ary_dim;
1888 gdb_assert (TYPE_CODE (type) == TYPE_CODE_ARRAY);
1891 range_type = check_typedef (TYPE_INDEX_TYPE (elt_type));
1892 range_type = resolve_dynamic_range (range_type, addr_stack);
1894 ary_dim = check_typedef (TYPE_TARGET_TYPE (elt_type));
1896 if (ary_dim != NULL && TYPE_CODE (ary_dim) == TYPE_CODE_ARRAY)
1897 elt_type = resolve_dynamic_array (TYPE_TARGET_TYPE (type), addr_stack);
1899 elt_type = TYPE_TARGET_TYPE (type);
1901 return create_array_type_with_stride (copy_type (type),
1902 elt_type, range_type,
1903 TYPE_FIELD_BITSIZE (type, 0));
1906 /* Resolve dynamic bounds of members of the union TYPE to static
1907 bounds. ADDR_STACK is a stack of struct property_addr_info
1908 to be used if needed during the dynamic resolution. */
1910 static struct type *
1911 resolve_dynamic_union (struct type *type,
1912 struct property_addr_info *addr_stack)
1914 struct type *resolved_type;
1916 unsigned int max_len = 0;
1918 gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION);
1920 resolved_type = copy_type (type);
1921 TYPE_FIELDS (resolved_type)
1922 = TYPE_ALLOC (resolved_type,
1923 TYPE_NFIELDS (resolved_type) * sizeof (struct field));
1924 memcpy (TYPE_FIELDS (resolved_type),
1926 TYPE_NFIELDS (resolved_type) * sizeof (struct field));
1927 for (i = 0; i < TYPE_NFIELDS (resolved_type); ++i)
1931 if (field_is_static (&TYPE_FIELD (type, i)))
1934 t = resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type, i),
1936 TYPE_FIELD_TYPE (resolved_type, i) = t;
1937 if (TYPE_LENGTH (t) > max_len)
1938 max_len = TYPE_LENGTH (t);
1941 TYPE_LENGTH (resolved_type) = max_len;
1942 return resolved_type;
1945 /* Resolve dynamic bounds of members of the struct TYPE to static
1946 bounds. ADDR_STACK is a stack of struct property_addr_info to
1947 be used if needed during the dynamic resolution. */
1949 static struct type *
1950 resolve_dynamic_struct (struct type *type,
1951 struct property_addr_info *addr_stack)
1953 struct type *resolved_type;
1955 unsigned resolved_type_bit_length = 0;
1957 gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT);
1958 gdb_assert (TYPE_NFIELDS (type) > 0);
1960 resolved_type = copy_type (type);
1961 TYPE_FIELDS (resolved_type)
1962 = TYPE_ALLOC (resolved_type,
1963 TYPE_NFIELDS (resolved_type) * sizeof (struct field));
1964 memcpy (TYPE_FIELDS (resolved_type),
1966 TYPE_NFIELDS (resolved_type) * sizeof (struct field));
1967 for (i = 0; i < TYPE_NFIELDS (resolved_type); ++i)
1969 unsigned new_bit_length;
1970 struct property_addr_info pinfo;
1972 if (field_is_static (&TYPE_FIELD (type, i)))
1975 /* As we know this field is not a static field, the field's
1976 field_loc_kind should be FIELD_LOC_KIND_BITPOS. Verify
1977 this is the case, but only trigger a simple error rather
1978 than an internal error if that fails. While failing
1979 that verification indicates a bug in our code, the error
1980 is not severe enough to suggest to the user he stops
1981 his debugging session because of it. */
1982 if (TYPE_FIELD_LOC_KIND (type, i) != FIELD_LOC_KIND_BITPOS)
1983 error (_("Cannot determine struct field location"
1984 " (invalid location kind)"));
1986 pinfo.type = check_typedef (TYPE_FIELD_TYPE (type, i));
1987 pinfo.addr = addr_stack->addr;
1988 pinfo.next = addr_stack;
1990 TYPE_FIELD_TYPE (resolved_type, i)
1991 = resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type, i),
1993 gdb_assert (TYPE_FIELD_LOC_KIND (resolved_type, i)
1994 == FIELD_LOC_KIND_BITPOS);
1996 new_bit_length = TYPE_FIELD_BITPOS (resolved_type, i);
1997 if (TYPE_FIELD_BITSIZE (resolved_type, i) != 0)
1998 new_bit_length += TYPE_FIELD_BITSIZE (resolved_type, i);
2000 new_bit_length += (TYPE_LENGTH (TYPE_FIELD_TYPE (resolved_type, i))
2003 /* Normally, we would use the position and size of the last field
2004 to determine the size of the enclosing structure. But GCC seems
2005 to be encoding the position of some fields incorrectly when
2006 the struct contains a dynamic field that is not placed last.
2007 So we compute the struct size based on the field that has
2008 the highest position + size - probably the best we can do. */
2009 if (new_bit_length > resolved_type_bit_length)
2010 resolved_type_bit_length = new_bit_length;
2013 TYPE_LENGTH (resolved_type)
2014 = (resolved_type_bit_length + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
2016 /* The Ada language uses this field as a cache for static fixed types: reset
2017 it as RESOLVED_TYPE must have its own static fixed type. */
2018 TYPE_TARGET_TYPE (resolved_type) = NULL;
2020 return resolved_type;
2023 /* Worker for resolved_dynamic_type. */
2025 static struct type *
2026 resolve_dynamic_type_internal (struct type *type,
2027 struct property_addr_info *addr_stack,
2030 struct type *real_type = check_typedef (type);
2031 struct type *resolved_type = type;
2032 struct dynamic_prop *prop;
2035 if (!is_dynamic_type_internal (real_type, top_level))
2038 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2040 resolved_type = copy_type (type);
2041 TYPE_TARGET_TYPE (resolved_type)
2042 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type), addr_stack,
2047 /* Before trying to resolve TYPE, make sure it is not a stub. */
2050 switch (TYPE_CODE (type))
2054 struct property_addr_info pinfo;
2056 pinfo.type = check_typedef (TYPE_TARGET_TYPE (type));
2057 pinfo.addr = read_memory_typed_address (addr_stack->addr, type);
2058 pinfo.next = addr_stack;
2060 resolved_type = copy_type (type);
2061 TYPE_TARGET_TYPE (resolved_type)
2062 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type),
2067 case TYPE_CODE_ARRAY:
2068 resolved_type = resolve_dynamic_array (type, addr_stack);
2071 case TYPE_CODE_RANGE:
2072 resolved_type = resolve_dynamic_range (type, addr_stack);
2075 case TYPE_CODE_UNION:
2076 resolved_type = resolve_dynamic_union (type, addr_stack);
2079 case TYPE_CODE_STRUCT:
2080 resolved_type = resolve_dynamic_struct (type, addr_stack);
2085 /* Resolve data_location attribute. */
2086 prop = TYPE_DATA_LOCATION (resolved_type);
2087 if (prop != NULL && dwarf2_evaluate_property (prop, addr_stack, &value))
2089 TYPE_DYN_PROP_ADDR (prop) = value;
2090 TYPE_DYN_PROP_KIND (prop) = PROP_CONST;
2093 return resolved_type;
2096 /* See gdbtypes.h */
2099 resolve_dynamic_type (struct type *type, CORE_ADDR addr)
2101 struct property_addr_info pinfo = {check_typedef (type), addr, NULL};
2103 return resolve_dynamic_type_internal (type, &pinfo, 1);
2106 /* See gdbtypes.h */
2108 struct dynamic_prop *
2109 get_dyn_prop (enum dynamic_prop_node_kind prop_kind, const struct type *type)
2111 struct dynamic_prop_list *node = TYPE_DYN_PROP_LIST (type);
2113 while (node != NULL)
2115 if (node->prop_kind == prop_kind)
2122 /* See gdbtypes.h */
2125 add_dyn_prop (enum dynamic_prop_node_kind prop_kind, struct dynamic_prop prop,
2126 struct type *type, struct objfile *objfile)
2128 struct dynamic_prop_list *temp;
2130 gdb_assert (TYPE_OBJFILE_OWNED (type));
2132 temp = obstack_alloc (&objfile->objfile_obstack,
2133 sizeof (struct dynamic_prop_list));
2134 temp->prop_kind = prop_kind;
2136 temp->next = TYPE_DYN_PROP_LIST (type);
2138 TYPE_DYN_PROP_LIST (type) = temp;
2142 /* Find the real type of TYPE. This function returns the real type,
2143 after removing all layers of typedefs, and completing opaque or stub
2144 types. Completion changes the TYPE argument, but stripping of
2147 Instance flags (e.g. const/volatile) are preserved as typedefs are
2148 stripped. If necessary a new qualified form of the underlying type
2151 NOTE: This will return a typedef if TYPE_TARGET_TYPE for the typedef has
2152 not been computed and we're either in the middle of reading symbols, or
2153 there was no name for the typedef in the debug info.
2155 NOTE: Lookup of opaque types can throw errors for invalid symbol files.
2156 QUITs in the symbol reading code can also throw.
2157 Thus this function can throw an exception.
2159 If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
2162 If this is a stubbed struct (i.e. declared as struct foo *), see if
2163 we can find a full definition in some other file. If so, copy this
2164 definition, so we can use it in future. There used to be a comment
2165 (but not any code) that if we don't find a full definition, we'd
2166 set a flag so we don't spend time in the future checking the same
2167 type. That would be a mistake, though--we might load in more
2168 symbols which contain a full definition for the type. */
2171 check_typedef (struct type *type)
2173 struct type *orig_type = type;
2174 /* While we're removing typedefs, we don't want to lose qualifiers.
2175 E.g., const/volatile. */
2176 int instance_flags = TYPE_INSTANCE_FLAGS (type);
2180 while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2182 if (!TYPE_TARGET_TYPE (type))
2187 /* It is dangerous to call lookup_symbol if we are currently
2188 reading a symtab. Infinite recursion is one danger. */
2189 if (currently_reading_symtab)
2190 return make_qualified_type (type, instance_flags, NULL);
2192 name = type_name_no_tag (type);
2193 /* FIXME: shouldn't we separately check the TYPE_NAME and
2194 the TYPE_TAG_NAME, and look in STRUCT_DOMAIN and/or
2195 VAR_DOMAIN as appropriate? (this code was written before
2196 TYPE_NAME and TYPE_TAG_NAME were separate). */
2199 stub_noname_complaint ();
2200 return make_qualified_type (type, instance_flags, NULL);
2202 sym = lookup_symbol (name, 0, STRUCT_DOMAIN, 0);
2204 TYPE_TARGET_TYPE (type) = SYMBOL_TYPE (sym);
2205 else /* TYPE_CODE_UNDEF */
2206 TYPE_TARGET_TYPE (type) = alloc_type_arch (get_type_arch (type));
2208 type = TYPE_TARGET_TYPE (type);
2210 /* Preserve the instance flags as we traverse down the typedef chain.
2212 Handling address spaces/classes is nasty, what do we do if there's a
2214 E.g., what if an outer typedef marks the type as class_1 and an inner
2215 typedef marks the type as class_2?
2216 This is the wrong place to do such error checking. We leave it to
2217 the code that created the typedef in the first place to flag the
2218 error. We just pick the outer address space (akin to letting the
2219 outer cast in a chain of casting win), instead of assuming
2220 "it can't happen". */
2222 const int ALL_SPACES = (TYPE_INSTANCE_FLAG_CODE_SPACE
2223 | TYPE_INSTANCE_FLAG_DATA_SPACE);
2224 const int ALL_CLASSES = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL;
2225 int new_instance_flags = TYPE_INSTANCE_FLAGS (type);
2227 /* Treat code vs data spaces and address classes separately. */
2228 if ((instance_flags & ALL_SPACES) != 0)
2229 new_instance_flags &= ~ALL_SPACES;
2230 if ((instance_flags & ALL_CLASSES) != 0)
2231 new_instance_flags &= ~ALL_CLASSES;
2233 instance_flags |= new_instance_flags;
2237 /* If this is a struct/class/union with no fields, then check
2238 whether a full definition exists somewhere else. This is for
2239 systems where a type definition with no fields is issued for such
2240 types, instead of identifying them as stub types in the first
2243 if (TYPE_IS_OPAQUE (type)
2244 && opaque_type_resolution
2245 && !currently_reading_symtab)
2247 const char *name = type_name_no_tag (type);
2248 struct type *newtype;
2252 stub_noname_complaint ();
2253 return make_qualified_type (type, instance_flags, NULL);
2255 newtype = lookup_transparent_type (name);
2259 /* If the resolved type and the stub are in the same
2260 objfile, then replace the stub type with the real deal.
2261 But if they're in separate objfiles, leave the stub
2262 alone; we'll just look up the transparent type every time
2263 we call check_typedef. We can't create pointers between
2264 types allocated to different objfiles, since they may
2265 have different lifetimes. Trying to copy NEWTYPE over to
2266 TYPE's objfile is pointless, too, since you'll have to
2267 move over any other types NEWTYPE refers to, which could
2268 be an unbounded amount of stuff. */
2269 if (TYPE_OBJFILE (newtype) == TYPE_OBJFILE (type))
2270 type = make_qualified_type (newtype,
2271 TYPE_INSTANCE_FLAGS (type),
2277 /* Otherwise, rely on the stub flag being set for opaque/stubbed
2279 else if (TYPE_STUB (type) && !currently_reading_symtab)
2281 const char *name = type_name_no_tag (type);
2282 /* FIXME: shouldn't we separately check the TYPE_NAME and the
2283 TYPE_TAG_NAME, and look in STRUCT_DOMAIN and/or VAR_DOMAIN
2284 as appropriate? (this code was written before TYPE_NAME and
2285 TYPE_TAG_NAME were separate). */
2290 stub_noname_complaint ();
2291 return make_qualified_type (type, instance_flags, NULL);
2293 sym = lookup_symbol (name, 0, STRUCT_DOMAIN, 0);
2296 /* Same as above for opaque types, we can replace the stub
2297 with the complete type only if they are in the same
2299 if (TYPE_OBJFILE (SYMBOL_TYPE(sym)) == TYPE_OBJFILE (type))
2300 type = make_qualified_type (SYMBOL_TYPE (sym),
2301 TYPE_INSTANCE_FLAGS (type),
2304 type = SYMBOL_TYPE (sym);
2308 if (TYPE_TARGET_STUB (type))
2310 struct type *range_type;
2311 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
2313 if (TYPE_STUB (target_type) || TYPE_TARGET_STUB (target_type))
2315 /* Nothing we can do. */
2317 else if (TYPE_CODE (type) == TYPE_CODE_RANGE)
2319 TYPE_LENGTH (type) = TYPE_LENGTH (target_type);
2320 TYPE_TARGET_STUB (type) = 0;
2324 type = make_qualified_type (type, instance_flags, NULL);
2326 /* Cache TYPE_LENGTH for future use. */
2327 TYPE_LENGTH (orig_type) = TYPE_LENGTH (type);
2332 /* Parse a type expression in the string [P..P+LENGTH). If an error
2333 occurs, silently return a void type. */
2335 static struct type *
2336 safe_parse_type (struct gdbarch *gdbarch, char *p, int length)
2338 struct ui_file *saved_gdb_stderr;
2339 struct type *type = NULL; /* Initialize to keep gcc happy. */
2341 /* Suppress error messages. */
2342 saved_gdb_stderr = gdb_stderr;
2343 gdb_stderr = ui_file_new ();
2345 /* Call parse_and_eval_type() without fear of longjmp()s. */
2348 type = parse_and_eval_type (p, length);
2350 CATCH (except, RETURN_MASK_ERROR)
2352 type = builtin_type (gdbarch)->builtin_void;
2356 /* Stop suppressing error messages. */
2357 ui_file_delete (gdb_stderr);
2358 gdb_stderr = saved_gdb_stderr;
2363 /* Ugly hack to convert method stubs into method types.
2365 He ain't kiddin'. This demangles the name of the method into a
2366 string including argument types, parses out each argument type,
2367 generates a string casting a zero to that type, evaluates the
2368 string, and stuffs the resulting type into an argtype vector!!!
2369 Then it knows the type of the whole function (including argument
2370 types for overloading), which info used to be in the stab's but was
2371 removed to hack back the space required for them. */
2374 check_stub_method (struct type *type, int method_id, int signature_id)
2376 struct gdbarch *gdbarch = get_type_arch (type);
2378 char *mangled_name = gdb_mangle_name (type, method_id, signature_id);
2379 char *demangled_name = gdb_demangle (mangled_name,
2380 DMGL_PARAMS | DMGL_ANSI);
2381 char *argtypetext, *p;
2382 int depth = 0, argcount = 1;
2383 struct field *argtypes;
2386 /* Make sure we got back a function string that we can use. */
2388 p = strchr (demangled_name, '(');
2392 if (demangled_name == NULL || p == NULL)
2393 error (_("Internal: Cannot demangle mangled name `%s'."),
2396 /* Now, read in the parameters that define this type. */
2401 if (*p == '(' || *p == '<')
2405 else if (*p == ')' || *p == '>')
2409 else if (*p == ',' && depth == 0)
2417 /* If we read one argument and it was ``void'', don't count it. */
2418 if (startswith (argtypetext, "(void)"))
2421 /* We need one extra slot, for the THIS pointer. */
2423 argtypes = (struct field *)
2424 TYPE_ALLOC (type, (argcount + 1) * sizeof (struct field));
2427 /* Add THIS pointer for non-static methods. */
2428 f = TYPE_FN_FIELDLIST1 (type, method_id);
2429 if (TYPE_FN_FIELD_STATIC_P (f, signature_id))
2433 argtypes[0].type = lookup_pointer_type (type);
2437 if (*p != ')') /* () means no args, skip while. */
2442 if (depth <= 0 && (*p == ',' || *p == ')'))
2444 /* Avoid parsing of ellipsis, they will be handled below.
2445 Also avoid ``void'' as above. */
2446 if (strncmp (argtypetext, "...", p - argtypetext) != 0
2447 && strncmp (argtypetext, "void", p - argtypetext) != 0)
2449 argtypes[argcount].type =
2450 safe_parse_type (gdbarch, argtypetext, p - argtypetext);
2453 argtypetext = p + 1;
2456 if (*p == '(' || *p == '<')
2460 else if (*p == ')' || *p == '>')
2469 TYPE_FN_FIELD_PHYSNAME (f, signature_id) = mangled_name;
2471 /* Now update the old "stub" type into a real type. */
2472 mtype = TYPE_FN_FIELD_TYPE (f, signature_id);
2473 /* MTYPE may currently be a function (TYPE_CODE_FUNC).
2474 We want a method (TYPE_CODE_METHOD). */
2475 smash_to_method_type (mtype, type, TYPE_TARGET_TYPE (mtype),
2476 argtypes, argcount, p[-2] == '.');
2477 TYPE_STUB (mtype) = 0;
2478 TYPE_FN_FIELD_STUB (f, signature_id) = 0;
2480 xfree (demangled_name);
2483 /* This is the external interface to check_stub_method, above. This
2484 function unstubs all of the signatures for TYPE's METHOD_ID method
2485 name. After calling this function TYPE_FN_FIELD_STUB will be
2486 cleared for each signature and TYPE_FN_FIELDLIST_NAME will be
2489 This function unfortunately can not die until stabs do. */
2492 check_stub_method_group (struct type *type, int method_id)
2494 int len = TYPE_FN_FIELDLIST_LENGTH (type, method_id);
2495 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
2496 int j, found_stub = 0;
2498 for (j = 0; j < len; j++)
2499 if (TYPE_FN_FIELD_STUB (f, j))
2502 check_stub_method (type, method_id, j);
2505 /* GNU v3 methods with incorrect names were corrected when we read
2506 in type information, because it was cheaper to do it then. The
2507 only GNU v2 methods with incorrect method names are operators and
2508 destructors; destructors were also corrected when we read in type
2511 Therefore the only thing we need to handle here are v2 operator
2513 if (found_stub && !startswith (TYPE_FN_FIELD_PHYSNAME (f, 0), "_Z"))
2516 char dem_opname[256];
2518 ret = cplus_demangle_opname (TYPE_FN_FIELDLIST_NAME (type,
2520 dem_opname, DMGL_ANSI);
2522 ret = cplus_demangle_opname (TYPE_FN_FIELDLIST_NAME (type,
2526 TYPE_FN_FIELDLIST_NAME (type, method_id) = xstrdup (dem_opname);
2530 /* Ensure it is in .rodata (if available) by workarounding GCC PR 44690. */
2531 const struct cplus_struct_type cplus_struct_default = { };
2534 allocate_cplus_struct_type (struct type *type)
2536 if (HAVE_CPLUS_STRUCT (type))
2537 /* Structure was already allocated. Nothing more to do. */
2540 TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_CPLUS_STUFF;
2541 TYPE_RAW_CPLUS_SPECIFIC (type) = (struct cplus_struct_type *)
2542 TYPE_ALLOC (type, sizeof (struct cplus_struct_type));
2543 *(TYPE_RAW_CPLUS_SPECIFIC (type)) = cplus_struct_default;
2544 set_type_vptr_fieldno (type, -1);
2547 const struct gnat_aux_type gnat_aux_default =
2550 /* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
2551 and allocate the associated gnat-specific data. The gnat-specific
2552 data is also initialized to gnat_aux_default. */
2555 allocate_gnat_aux_type (struct type *type)
2557 TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_GNAT_STUFF;
2558 TYPE_GNAT_SPECIFIC (type) = (struct gnat_aux_type *)
2559 TYPE_ALLOC (type, sizeof (struct gnat_aux_type));
2560 *(TYPE_GNAT_SPECIFIC (type)) = gnat_aux_default;
2563 /* Helper function to initialize the standard scalar types.
2565 If NAME is non-NULL, then it is used to initialize the type name.
2566 Note that NAME is not copied; it is required to have a lifetime at
2567 least as long as OBJFILE. */
2570 init_type (enum type_code code, int length, int flags,
2571 const char *name, struct objfile *objfile)
2575 type = alloc_type (objfile);
2576 TYPE_CODE (type) = code;
2577 TYPE_LENGTH (type) = length;
2579 gdb_assert (!(flags & (TYPE_FLAG_MIN - 1)));
2580 if (flags & TYPE_FLAG_UNSIGNED)
2581 TYPE_UNSIGNED (type) = 1;
2582 if (flags & TYPE_FLAG_NOSIGN)
2583 TYPE_NOSIGN (type) = 1;
2584 if (flags & TYPE_FLAG_STUB)
2585 TYPE_STUB (type) = 1;
2586 if (flags & TYPE_FLAG_TARGET_STUB)
2587 TYPE_TARGET_STUB (type) = 1;
2588 if (flags & TYPE_FLAG_STATIC)
2589 TYPE_STATIC (type) = 1;
2590 if (flags & TYPE_FLAG_PROTOTYPED)
2591 TYPE_PROTOTYPED (type) = 1;
2592 if (flags & TYPE_FLAG_INCOMPLETE)
2593 TYPE_INCOMPLETE (type) = 1;
2594 if (flags & TYPE_FLAG_VARARGS)
2595 TYPE_VARARGS (type) = 1;
2596 if (flags & TYPE_FLAG_VECTOR)
2597 TYPE_VECTOR (type) = 1;
2598 if (flags & TYPE_FLAG_STUB_SUPPORTED)
2599 TYPE_STUB_SUPPORTED (type) = 1;
2600 if (flags & TYPE_FLAG_FIXED_INSTANCE)
2601 TYPE_FIXED_INSTANCE (type) = 1;
2602 if (flags & TYPE_FLAG_GNU_IFUNC)
2603 TYPE_GNU_IFUNC (type) = 1;
2605 TYPE_NAME (type) = name;
2609 if (name && strcmp (name, "char") == 0)
2610 TYPE_NOSIGN (type) = 1;
2614 case TYPE_CODE_STRUCT:
2615 case TYPE_CODE_UNION:
2616 case TYPE_CODE_NAMESPACE:
2617 INIT_CPLUS_SPECIFIC (type);
2620 TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_FLOATFORMAT;
2622 case TYPE_CODE_FUNC:
2623 INIT_FUNC_SPECIFIC (type);
2629 /* Queries on types. */
2632 can_dereference (struct type *t)
2634 /* FIXME: Should we return true for references as well as
2639 && TYPE_CODE (t) == TYPE_CODE_PTR
2640 && TYPE_CODE (TYPE_TARGET_TYPE (t)) != TYPE_CODE_VOID);
2644 is_integral_type (struct type *t)
2649 && ((TYPE_CODE (t) == TYPE_CODE_INT)
2650 || (TYPE_CODE (t) == TYPE_CODE_ENUM)
2651 || (TYPE_CODE (t) == TYPE_CODE_FLAGS)
2652 || (TYPE_CODE (t) == TYPE_CODE_CHAR)
2653 || (TYPE_CODE (t) == TYPE_CODE_RANGE)
2654 || (TYPE_CODE (t) == TYPE_CODE_BOOL)));
2657 /* Return true if TYPE is scalar. */
2660 is_scalar_type (struct type *type)
2662 CHECK_TYPEDEF (type);
2664 switch (TYPE_CODE (type))
2666 case TYPE_CODE_ARRAY:
2667 case TYPE_CODE_STRUCT:
2668 case TYPE_CODE_UNION:
2670 case TYPE_CODE_STRING:
2677 /* Return true if T is scalar, or a composite type which in practice has
2678 the memory layout of a scalar type. E.g., an array or struct with only
2679 one scalar element inside it, or a union with only scalar elements. */
2682 is_scalar_type_recursive (struct type *t)
2686 if (is_scalar_type (t))
2688 /* Are we dealing with an array or string of known dimensions? */
2689 else if ((TYPE_CODE (t) == TYPE_CODE_ARRAY
2690 || TYPE_CODE (t) == TYPE_CODE_STRING) && TYPE_NFIELDS (t) == 1
2691 && TYPE_CODE (TYPE_INDEX_TYPE (t)) == TYPE_CODE_RANGE)
2693 LONGEST low_bound, high_bound;
2694 struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (t));
2696 get_discrete_bounds (TYPE_INDEX_TYPE (t), &low_bound, &high_bound);
2698 return high_bound == low_bound && is_scalar_type_recursive (elt_type);
2700 /* Are we dealing with a struct with one element? */
2701 else if (TYPE_CODE (t) == TYPE_CODE_STRUCT && TYPE_NFIELDS (t) == 1)
2702 return is_scalar_type_recursive (TYPE_FIELD_TYPE (t, 0));
2703 else if (TYPE_CODE (t) == TYPE_CODE_UNION)
2705 int i, n = TYPE_NFIELDS (t);
2707 /* If all elements of the union are scalar, then the union is scalar. */
2708 for (i = 0; i < n; i++)
2709 if (!is_scalar_type_recursive (TYPE_FIELD_TYPE (t, i)))
2718 /* Return true is T is a class or a union. False otherwise. */
2721 class_or_union_p (const struct type *t)
2723 return (TYPE_CODE (t) == TYPE_CODE_STRUCT
2724 || TYPE_CODE (t) == TYPE_CODE_UNION);
2727 /* A helper function which returns true if types A and B represent the
2728 "same" class type. This is true if the types have the same main
2729 type, or the same name. */
2732 class_types_same_p (const struct type *a, const struct type *b)
2734 return (TYPE_MAIN_TYPE (a) == TYPE_MAIN_TYPE (b)
2735 || (TYPE_NAME (a) && TYPE_NAME (b)
2736 && !strcmp (TYPE_NAME (a), TYPE_NAME (b))));
2739 /* If BASE is an ancestor of DCLASS return the distance between them.
2740 otherwise return -1;
2744 class B: public A {};
2745 class C: public B {};
2748 distance_to_ancestor (A, A, 0) = 0
2749 distance_to_ancestor (A, B, 0) = 1
2750 distance_to_ancestor (A, C, 0) = 2
2751 distance_to_ancestor (A, D, 0) = 3
2753 If PUBLIC is 1 then only public ancestors are considered,
2754 and the function returns the distance only if BASE is a public ancestor
2758 distance_to_ancestor (A, D, 1) = -1. */
2761 distance_to_ancestor (struct type *base, struct type *dclass, int is_public)
2766 CHECK_TYPEDEF (base);
2767 CHECK_TYPEDEF (dclass);
2769 if (class_types_same_p (base, dclass))
2772 for (i = 0; i < TYPE_N_BASECLASSES (dclass); i++)
2774 if (is_public && ! BASETYPE_VIA_PUBLIC (dclass, i))
2777 d = distance_to_ancestor (base, TYPE_BASECLASS (dclass, i), is_public);
2785 /* Check whether BASE is an ancestor or base class or DCLASS
2786 Return 1 if so, and 0 if not.
2787 Note: If BASE and DCLASS are of the same type, this function
2788 will return 1. So for some class A, is_ancestor (A, A) will
2792 is_ancestor (struct type *base, struct type *dclass)
2794 return distance_to_ancestor (base, dclass, 0) >= 0;
2797 /* Like is_ancestor, but only returns true when BASE is a public
2798 ancestor of DCLASS. */
2801 is_public_ancestor (struct type *base, struct type *dclass)
2803 return distance_to_ancestor (base, dclass, 1) >= 0;
2806 /* A helper function for is_unique_ancestor. */
2809 is_unique_ancestor_worker (struct type *base, struct type *dclass,
2811 const gdb_byte *valaddr, int embedded_offset,
2812 CORE_ADDR address, struct value *val)
2816 CHECK_TYPEDEF (base);
2817 CHECK_TYPEDEF (dclass);
2819 for (i = 0; i < TYPE_N_BASECLASSES (dclass) && count < 2; ++i)
2824 iter = check_typedef (TYPE_BASECLASS (dclass, i));
2826 this_offset = baseclass_offset (dclass, i, valaddr, embedded_offset,
2829 if (class_types_same_p (base, iter))
2831 /* If this is the first subclass, set *OFFSET and set count
2832 to 1. Otherwise, if this is at the same offset as
2833 previous instances, do nothing. Otherwise, increment
2837 *offset = this_offset;
2840 else if (this_offset == *offset)
2848 count += is_unique_ancestor_worker (base, iter, offset,
2850 embedded_offset + this_offset,
2857 /* Like is_ancestor, but only returns true if BASE is a unique base
2858 class of the type of VAL. */
2861 is_unique_ancestor (struct type *base, struct value *val)
2865 return is_unique_ancestor_worker (base, value_type (val), &offset,
2866 value_contents_for_printing (val),
2867 value_embedded_offset (val),
2868 value_address (val), val) == 1;
2872 /* Overload resolution. */
2874 /* Return the sum of the rank of A with the rank of B. */
2877 sum_ranks (struct rank a, struct rank b)
2880 c.rank = a.rank + b.rank;
2881 c.subrank = a.subrank + b.subrank;
2885 /* Compare rank A and B and return:
2887 1 if a is better than b
2888 -1 if b is better than a. */
2891 compare_ranks (struct rank a, struct rank b)
2893 if (a.rank == b.rank)
2895 if (a.subrank == b.subrank)
2897 if (a.subrank < b.subrank)
2899 if (a.subrank > b.subrank)
2903 if (a.rank < b.rank)
2906 /* a.rank > b.rank */
2910 /* Functions for overload resolution begin here. */
2912 /* Compare two badness vectors A and B and return the result.
2913 0 => A and B are identical
2914 1 => A and B are incomparable
2915 2 => A is better than B
2916 3 => A is worse than B */
2919 compare_badness (struct badness_vector *a, struct badness_vector *b)
2923 short found_pos = 0; /* any positives in c? */
2924 short found_neg = 0; /* any negatives in c? */
2926 /* differing lengths => incomparable */
2927 if (a->length != b->length)
2930 /* Subtract b from a */
2931 for (i = 0; i < a->length; i++)
2933 tmp = compare_ranks (b->rank[i], a->rank[i]);
2943 return 1; /* incomparable */
2945 return 3; /* A > B */
2951 return 2; /* A < B */
2953 return 0; /* A == B */
2957 /* Rank a function by comparing its parameter types (PARMS, length
2958 NPARMS), to the types of an argument list (ARGS, length NARGS).
2959 Return a pointer to a badness vector. This has NARGS + 1
2962 struct badness_vector *
2963 rank_function (struct type **parms, int nparms,
2964 struct value **args, int nargs)
2967 struct badness_vector *bv;
2968 int min_len = nparms < nargs ? nparms : nargs;
2970 bv = xmalloc (sizeof (struct badness_vector));
2971 bv->length = nargs + 1; /* add 1 for the length-match rank. */
2972 bv->rank = XNEWVEC (struct rank, nargs + 1);
2974 /* First compare the lengths of the supplied lists.
2975 If there is a mismatch, set it to a high value. */
2977 /* pai/1997-06-03 FIXME: when we have debug info about default
2978 arguments and ellipsis parameter lists, we should consider those
2979 and rank the length-match more finely. */
2981 LENGTH_MATCH (bv) = (nargs != nparms)
2982 ? LENGTH_MISMATCH_BADNESS
2983 : EXACT_MATCH_BADNESS;
2985 /* Now rank all the parameters of the candidate function. */
2986 for (i = 1; i <= min_len; i++)
2987 bv->rank[i] = rank_one_type (parms[i - 1], value_type (args[i - 1]),
2990 /* If more arguments than parameters, add dummy entries. */
2991 for (i = min_len + 1; i <= nargs; i++)
2992 bv->rank[i] = TOO_FEW_PARAMS_BADNESS;
2997 /* Compare the names of two integer types, assuming that any sign
2998 qualifiers have been checked already. We do it this way because
2999 there may be an "int" in the name of one of the types. */
3002 integer_types_same_name_p (const char *first, const char *second)
3004 int first_p, second_p;
3006 /* If both are shorts, return 1; if neither is a short, keep
3008 first_p = (strstr (first, "short") != NULL);
3009 second_p = (strstr (second, "short") != NULL);
3010 if (first_p && second_p)
3012 if (first_p || second_p)
3015 /* Likewise for long. */
3016 first_p = (strstr (first, "long") != NULL);
3017 second_p = (strstr (second, "long") != NULL);
3018 if (first_p && second_p)
3020 if (first_p || second_p)
3023 /* Likewise for char. */
3024 first_p = (strstr (first, "char") != NULL);
3025 second_p = (strstr (second, "char") != NULL);
3026 if (first_p && second_p)
3028 if (first_p || second_p)
3031 /* They must both be ints. */
3035 /* Compares type A to type B returns 1 if the represent the same type
3039 types_equal (struct type *a, struct type *b)
3041 /* Identical type pointers. */
3042 /* However, this still doesn't catch all cases of same type for b
3043 and a. The reason is that builtin types are different from
3044 the same ones constructed from the object. */
3048 /* Resolve typedefs */
3049 if (TYPE_CODE (a) == TYPE_CODE_TYPEDEF)
3050 a = check_typedef (a);
3051 if (TYPE_CODE (b) == TYPE_CODE_TYPEDEF)
3052 b = check_typedef (b);
3054 /* If after resolving typedefs a and b are not of the same type
3055 code then they are not equal. */
3056 if (TYPE_CODE (a) != TYPE_CODE (b))
3059 /* If a and b are both pointers types or both reference types then
3060 they are equal of the same type iff the objects they refer to are
3061 of the same type. */
3062 if (TYPE_CODE (a) == TYPE_CODE_PTR
3063 || TYPE_CODE (a) == TYPE_CODE_REF)
3064 return types_equal (TYPE_TARGET_TYPE (a),
3065 TYPE_TARGET_TYPE (b));
3067 /* Well, damnit, if the names are exactly the same, I'll say they
3068 are exactly the same. This happens when we generate method
3069 stubs. The types won't point to the same address, but they
3070 really are the same. */
3072 if (TYPE_NAME (a) && TYPE_NAME (b)
3073 && strcmp (TYPE_NAME (a), TYPE_NAME (b)) == 0)
3076 /* Check if identical after resolving typedefs. */
3080 /* Two function types are equal if their argument and return types
3082 if (TYPE_CODE (a) == TYPE_CODE_FUNC)
3086 if (TYPE_NFIELDS (a) != TYPE_NFIELDS (b))
3089 if (!types_equal (TYPE_TARGET_TYPE (a), TYPE_TARGET_TYPE (b)))
3092 for (i = 0; i < TYPE_NFIELDS (a); ++i)
3093 if (!types_equal (TYPE_FIELD_TYPE (a, i), TYPE_FIELD_TYPE (b, i)))
3102 /* Deep comparison of types. */
3104 /* An entry in the type-equality bcache. */
3106 typedef struct type_equality_entry
3108 struct type *type1, *type2;
3109 } type_equality_entry_d;
3111 DEF_VEC_O (type_equality_entry_d);
3113 /* A helper function to compare two strings. Returns 1 if they are
3114 the same, 0 otherwise. Handles NULLs properly. */
3117 compare_maybe_null_strings (const char *s, const char *t)
3119 if (s == NULL && t != NULL)
3121 else if (s != NULL && t == NULL)
3123 else if (s == NULL && t== NULL)
3125 return strcmp (s, t) == 0;
3128 /* A helper function for check_types_worklist that checks two types for
3129 "deep" equality. Returns non-zero if the types are considered the
3130 same, zero otherwise. */
3133 check_types_equal (struct type *type1, struct type *type2,
3134 VEC (type_equality_entry_d) **worklist)
3136 CHECK_TYPEDEF (type1);
3137 CHECK_TYPEDEF (type2);
3142 if (TYPE_CODE (type1) != TYPE_CODE (type2)
3143 || TYPE_LENGTH (type1) != TYPE_LENGTH (type2)
3144 || TYPE_UNSIGNED (type1) != TYPE_UNSIGNED (type2)
3145 || TYPE_NOSIGN (type1) != TYPE_NOSIGN (type2)
3146 || TYPE_VARARGS (type1) != TYPE_VARARGS (type2)
3147 || TYPE_VECTOR (type1) != TYPE_VECTOR (type2)
3148 || TYPE_NOTTEXT (type1) != TYPE_NOTTEXT (type2)
3149 || TYPE_INSTANCE_FLAGS (type1) != TYPE_INSTANCE_FLAGS (type2)
3150 || TYPE_NFIELDS (type1) != TYPE_NFIELDS (type2))
3153 if (!compare_maybe_null_strings (TYPE_TAG_NAME (type1),
3154 TYPE_TAG_NAME (type2)))
3156 if (!compare_maybe_null_strings (TYPE_NAME (type1), TYPE_NAME (type2)))
3159 if (TYPE_CODE (type1) == TYPE_CODE_RANGE)
3161 if (memcmp (TYPE_RANGE_DATA (type1), TYPE_RANGE_DATA (type2),
3162 sizeof (*TYPE_RANGE_DATA (type1))) != 0)
3169 for (i = 0; i < TYPE_NFIELDS (type1); ++i)
3171 const struct field *field1 = &TYPE_FIELD (type1, i);
3172 const struct field *field2 = &TYPE_FIELD (type2, i);
3173 struct type_equality_entry entry;
3175 if (FIELD_ARTIFICIAL (*field1) != FIELD_ARTIFICIAL (*field2)
3176 || FIELD_BITSIZE (*field1) != FIELD_BITSIZE (*field2)
3177 || FIELD_LOC_KIND (*field1) != FIELD_LOC_KIND (*field2))
3179 if (!compare_maybe_null_strings (FIELD_NAME (*field1),
3180 FIELD_NAME (*field2)))
3182 switch (FIELD_LOC_KIND (*field1))
3184 case FIELD_LOC_KIND_BITPOS:
3185 if (FIELD_BITPOS (*field1) != FIELD_BITPOS (*field2))
3188 case FIELD_LOC_KIND_ENUMVAL:
3189 if (FIELD_ENUMVAL (*field1) != FIELD_ENUMVAL (*field2))
3192 case FIELD_LOC_KIND_PHYSADDR:
3193 if (FIELD_STATIC_PHYSADDR (*field1)
3194 != FIELD_STATIC_PHYSADDR (*field2))
3197 case FIELD_LOC_KIND_PHYSNAME:
3198 if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1),
3199 FIELD_STATIC_PHYSNAME (*field2)))
3202 case FIELD_LOC_KIND_DWARF_BLOCK:
3204 struct dwarf2_locexpr_baton *block1, *block2;
3206 block1 = FIELD_DWARF_BLOCK (*field1);
3207 block2 = FIELD_DWARF_BLOCK (*field2);
3208 if (block1->per_cu != block2->per_cu
3209 || block1->size != block2->size
3210 || memcmp (block1->data, block2->data, block1->size) != 0)
3215 internal_error (__FILE__, __LINE__, _("Unsupported field kind "
3216 "%d by check_types_equal"),
3217 FIELD_LOC_KIND (*field1));
3220 entry.type1 = FIELD_TYPE (*field1);
3221 entry.type2 = FIELD_TYPE (*field2);
3222 VEC_safe_push (type_equality_entry_d, *worklist, &entry);
3226 if (TYPE_TARGET_TYPE (type1) != NULL)
3228 struct type_equality_entry entry;
3230 if (TYPE_TARGET_TYPE (type2) == NULL)
3233 entry.type1 = TYPE_TARGET_TYPE (type1);
3234 entry.type2 = TYPE_TARGET_TYPE (type2);
3235 VEC_safe_push (type_equality_entry_d, *worklist, &entry);
3237 else if (TYPE_TARGET_TYPE (type2) != NULL)
3243 /* Check types on a worklist for equality. Returns zero if any pair
3244 is not equal, non-zero if they are all considered equal. */
3247 check_types_worklist (VEC (type_equality_entry_d) **worklist,
3248 struct bcache *cache)
3250 while (!VEC_empty (type_equality_entry_d, *worklist))
3252 struct type_equality_entry entry;
3255 entry = *VEC_last (type_equality_entry_d, *worklist);
3256 VEC_pop (type_equality_entry_d, *worklist);
3258 /* If the type pair has already been visited, we know it is
3260 bcache_full (&entry, sizeof (entry), cache, &added);
3264 if (check_types_equal (entry.type1, entry.type2, worklist) == 0)
3271 /* Return non-zero if types TYPE1 and TYPE2 are equal, as determined by a
3272 "deep comparison". Otherwise return zero. */
3275 types_deeply_equal (struct type *type1, struct type *type2)
3277 struct gdb_exception except = exception_none;
3279 struct bcache *cache;
3280 VEC (type_equality_entry_d) *worklist = NULL;
3281 struct type_equality_entry entry;
3283 gdb_assert (type1 != NULL && type2 != NULL);
3285 /* Early exit for the simple case. */
3289 cache = bcache_xmalloc (NULL, NULL);
3291 entry.type1 = type1;
3292 entry.type2 = type2;
3293 VEC_safe_push (type_equality_entry_d, worklist, &entry);
3295 /* check_types_worklist calls several nested helper functions, some
3296 of which can raise a GDB exception, so we just check and rethrow
3297 here. If there is a GDB exception, a comparison is not capable
3298 (or trusted), so exit. */
3301 result = check_types_worklist (&worklist, cache);
3303 CATCH (ex, RETURN_MASK_ALL)
3309 bcache_xfree (cache);
3310 VEC_free (type_equality_entry_d, worklist);
3312 /* Rethrow if there was a problem. */
3313 if (except.reason < 0)
3314 throw_exception (except);
3319 /* Compare one type (PARM) for compatibility with another (ARG).
3320 * PARM is intended to be the parameter type of a function; and
3321 * ARG is the supplied argument's type. This function tests if
3322 * the latter can be converted to the former.
3323 * VALUE is the argument's value or NULL if none (or called recursively)
3325 * Return 0 if they are identical types;
3326 * Otherwise, return an integer which corresponds to how compatible
3327 * PARM is to ARG. The higher the return value, the worse the match.
3328 * Generally the "bad" conversions are all uniformly assigned a 100. */
3331 rank_one_type (struct type *parm, struct type *arg, struct value *value)
3333 struct rank rank = {0,0};
3335 if (types_equal (parm, arg))
3336 return EXACT_MATCH_BADNESS;
3338 /* Resolve typedefs */
3339 if (TYPE_CODE (parm) == TYPE_CODE_TYPEDEF)
3340 parm = check_typedef (parm);
3341 if (TYPE_CODE (arg) == TYPE_CODE_TYPEDEF)
3342 arg = check_typedef (arg);
3344 /* See through references, since we can almost make non-references
3346 if (TYPE_CODE (arg) == TYPE_CODE_REF)
3347 return (sum_ranks (rank_one_type (parm, TYPE_TARGET_TYPE (arg), NULL),
3348 REFERENCE_CONVERSION_BADNESS));
3349 if (TYPE_CODE (parm) == TYPE_CODE_REF)
3350 return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm), arg, NULL),
3351 REFERENCE_CONVERSION_BADNESS));
3353 /* Debugging only. */
3354 fprintf_filtered (gdb_stderr,
3355 "------ Arg is %s [%d], parm is %s [%d]\n",
3356 TYPE_NAME (arg), TYPE_CODE (arg),
3357 TYPE_NAME (parm), TYPE_CODE (parm));
3359 /* x -> y means arg of type x being supplied for parameter of type y. */
3361 switch (TYPE_CODE (parm))
3364 switch (TYPE_CODE (arg))
3368 /* Allowed pointer conversions are:
3369 (a) pointer to void-pointer conversion. */
3370 if (TYPE_CODE (TYPE_TARGET_TYPE (parm)) == TYPE_CODE_VOID)
3371 return VOID_PTR_CONVERSION_BADNESS;
3373 /* (b) pointer to ancestor-pointer conversion. */
3374 rank.subrank = distance_to_ancestor (TYPE_TARGET_TYPE (parm),
3375 TYPE_TARGET_TYPE (arg),
3377 if (rank.subrank >= 0)
3378 return sum_ranks (BASE_PTR_CONVERSION_BADNESS, rank);
3380 return INCOMPATIBLE_TYPE_BADNESS;
3381 case TYPE_CODE_ARRAY:
3382 if (types_equal (TYPE_TARGET_TYPE (parm),
3383 TYPE_TARGET_TYPE (arg)))
3384 return EXACT_MATCH_BADNESS;
3385 return INCOMPATIBLE_TYPE_BADNESS;
3386 case TYPE_CODE_FUNC:
3387 return rank_one_type (TYPE_TARGET_TYPE (parm), arg, NULL);
3389 if (value != NULL && TYPE_CODE (value_type (value)) == TYPE_CODE_INT)
3391 if (value_as_long (value) == 0)
3393 /* Null pointer conversion: allow it to be cast to a pointer.
3394 [4.10.1 of C++ standard draft n3290] */
3395 return NULL_POINTER_CONVERSION_BADNESS;
3399 /* If type checking is disabled, allow the conversion. */
3400 if (!strict_type_checking)
3401 return NS_INTEGER_POINTER_CONVERSION_BADNESS;
3405 case TYPE_CODE_ENUM:
3406 case TYPE_CODE_FLAGS:
3407 case TYPE_CODE_CHAR:
3408 case TYPE_CODE_RANGE:
3409 case TYPE_CODE_BOOL:
3411 return INCOMPATIBLE_TYPE_BADNESS;
3413 case TYPE_CODE_ARRAY:
3414 switch (TYPE_CODE (arg))
3417 case TYPE_CODE_ARRAY:
3418 return rank_one_type (TYPE_TARGET_TYPE (parm),
3419 TYPE_TARGET_TYPE (arg), NULL);
3421 return INCOMPATIBLE_TYPE_BADNESS;
3423 case TYPE_CODE_FUNC:
3424 switch (TYPE_CODE (arg))
3426 case TYPE_CODE_PTR: /* funcptr -> func */
3427 return rank_one_type (parm, TYPE_TARGET_TYPE (arg), NULL);
3429 return INCOMPATIBLE_TYPE_BADNESS;
3432 switch (TYPE_CODE (arg))
3435 if (TYPE_LENGTH (arg) == TYPE_LENGTH (parm))
3437 /* Deal with signed, unsigned, and plain chars and
3438 signed and unsigned ints. */
3439 if (TYPE_NOSIGN (parm))
3441 /* This case only for character types. */
3442 if (TYPE_NOSIGN (arg))
3443 return EXACT_MATCH_BADNESS; /* plain char -> plain char */
3444 else /* signed/unsigned char -> plain char */
3445 return INTEGER_CONVERSION_BADNESS;
3447 else if (TYPE_UNSIGNED (parm))
3449 if (TYPE_UNSIGNED (arg))
3451 /* unsigned int -> unsigned int, or
3452 unsigned long -> unsigned long */
3453 if (integer_types_same_name_p (TYPE_NAME (parm),
3455 return EXACT_MATCH_BADNESS;
3456 else if (integer_types_same_name_p (TYPE_NAME (arg),
3458 && integer_types_same_name_p (TYPE_NAME (parm),
3460 /* unsigned int -> unsigned long */
3461 return INTEGER_PROMOTION_BADNESS;
3463 /* unsigned long -> unsigned int */
3464 return INTEGER_CONVERSION_BADNESS;
3468 if (integer_types_same_name_p (TYPE_NAME (arg),
3470 && integer_types_same_name_p (TYPE_NAME (parm),
3472 /* signed long -> unsigned int */
3473 return INTEGER_CONVERSION_BADNESS;
3475 /* signed int/long -> unsigned int/long */
3476 return INTEGER_CONVERSION_BADNESS;
3479 else if (!TYPE_NOSIGN (arg) && !TYPE_UNSIGNED (arg))
3481 if (integer_types_same_name_p (TYPE_NAME (parm),
3483 return EXACT_MATCH_BADNESS;
3484 else if (integer_types_same_name_p (TYPE_NAME (arg),
3486 && integer_types_same_name_p (TYPE_NAME (parm),
3488 return INTEGER_PROMOTION_BADNESS;
3490 return INTEGER_CONVERSION_BADNESS;
3493 return INTEGER_CONVERSION_BADNESS;
3495 else if (TYPE_LENGTH (arg) < TYPE_LENGTH (parm))
3496 return INTEGER_PROMOTION_BADNESS;
3498 return INTEGER_CONVERSION_BADNESS;
3499 case TYPE_CODE_ENUM:
3500 case TYPE_CODE_FLAGS:
3501 case TYPE_CODE_CHAR:
3502 case TYPE_CODE_RANGE:
3503 case TYPE_CODE_BOOL:
3504 if (TYPE_DECLARED_CLASS (arg))
3505 return INCOMPATIBLE_TYPE_BADNESS;
3506 return INTEGER_PROMOTION_BADNESS;
3508 return INT_FLOAT_CONVERSION_BADNESS;
3510 return NS_POINTER_CONVERSION_BADNESS;
3512 return INCOMPATIBLE_TYPE_BADNESS;
3515 case TYPE_CODE_ENUM:
3516 switch (TYPE_CODE (arg))
3519 case TYPE_CODE_CHAR:
3520 case TYPE_CODE_RANGE:
3521 case TYPE_CODE_BOOL:
3522 case TYPE_CODE_ENUM:
3523 if (TYPE_DECLARED_CLASS (parm) || TYPE_DECLARED_CLASS (arg))
3524 return INCOMPATIBLE_TYPE_BADNESS;
3525 return INTEGER_CONVERSION_BADNESS;
3527 return INT_FLOAT_CONVERSION_BADNESS;
3529 return INCOMPATIBLE_TYPE_BADNESS;
3532 case TYPE_CODE_CHAR:
3533 switch (TYPE_CODE (arg))
3535 case TYPE_CODE_RANGE:
3536 case TYPE_CODE_BOOL:
3537 case TYPE_CODE_ENUM:
3538 if (TYPE_DECLARED_CLASS (arg))
3539 return INCOMPATIBLE_TYPE_BADNESS;
3540 return INTEGER_CONVERSION_BADNESS;
3542 return INT_FLOAT_CONVERSION_BADNESS;
3544 if (TYPE_LENGTH (arg) > TYPE_LENGTH (parm))
3545 return INTEGER_CONVERSION_BADNESS;
3546 else if (TYPE_LENGTH (arg) < TYPE_LENGTH (parm))
3547 return INTEGER_PROMOTION_BADNESS;
3548 /* >>> !! else fall through !! <<< */
3549 case TYPE_CODE_CHAR:
3550 /* Deal with signed, unsigned, and plain chars for C++ and
3551 with int cases falling through from previous case. */
3552 if (TYPE_NOSIGN (parm))
3554 if (TYPE_NOSIGN (arg))
3555 return EXACT_MATCH_BADNESS;
3557 return INTEGER_CONVERSION_BADNESS;
3559 else if (TYPE_UNSIGNED (parm))
3561 if (TYPE_UNSIGNED (arg))
3562 return EXACT_MATCH_BADNESS;
3564 return INTEGER_PROMOTION_BADNESS;
3566 else if (!TYPE_NOSIGN (arg) && !TYPE_UNSIGNED (arg))
3567 return EXACT_MATCH_BADNESS;
3569 return INTEGER_CONVERSION_BADNESS;
3571 return INCOMPATIBLE_TYPE_BADNESS;
3574 case TYPE_CODE_RANGE:
3575 switch (TYPE_CODE (arg))
3578 case TYPE_CODE_CHAR:
3579 case TYPE_CODE_RANGE:
3580 case TYPE_CODE_BOOL:
3581 case TYPE_CODE_ENUM:
3582 return INTEGER_CONVERSION_BADNESS;
3584 return INT_FLOAT_CONVERSION_BADNESS;
3586 return INCOMPATIBLE_TYPE_BADNESS;
3589 case TYPE_CODE_BOOL:
3590 switch (TYPE_CODE (arg))
3592 /* n3290 draft, section 4.12.1 (conv.bool):
3594 "A prvalue of arithmetic, unscoped enumeration, pointer, or
3595 pointer to member type can be converted to a prvalue of type
3596 bool. A zero value, null pointer value, or null member pointer
3597 value is converted to false; any other value is converted to
3598 true. A prvalue of type std::nullptr_t can be converted to a
3599 prvalue of type bool; the resulting value is false." */
3601 case TYPE_CODE_CHAR:
3602 case TYPE_CODE_ENUM:
3604 case TYPE_CODE_MEMBERPTR:
3606 return BOOL_CONVERSION_BADNESS;
3607 case TYPE_CODE_RANGE:
3608 return INCOMPATIBLE_TYPE_BADNESS;
3609 case TYPE_CODE_BOOL:
3610 return EXACT_MATCH_BADNESS;
3612 return INCOMPATIBLE_TYPE_BADNESS;
3616 switch (TYPE_CODE (arg))
3619 if (TYPE_LENGTH (arg) < TYPE_LENGTH (parm))
3620 return FLOAT_PROMOTION_BADNESS;
3621 else if (TYPE_LENGTH (arg) == TYPE_LENGTH (parm))
3622 return EXACT_MATCH_BADNESS;
3624 return FLOAT_CONVERSION_BADNESS;
3626 case TYPE_CODE_BOOL:
3627 case TYPE_CODE_ENUM:
3628 case TYPE_CODE_RANGE:
3629 case TYPE_CODE_CHAR:
3630 return INT_FLOAT_CONVERSION_BADNESS;
3632 return INCOMPATIBLE_TYPE_BADNESS;
3635 case TYPE_CODE_COMPLEX:
3636 switch (TYPE_CODE (arg))
3637 { /* Strictly not needed for C++, but... */
3639 return FLOAT_PROMOTION_BADNESS;
3640 case TYPE_CODE_COMPLEX:
3641 return EXACT_MATCH_BADNESS;
3643 return INCOMPATIBLE_TYPE_BADNESS;
3646 case TYPE_CODE_STRUCT:
3647 switch (TYPE_CODE (arg))
3649 case TYPE_CODE_STRUCT:
3650 /* Check for derivation */
3651 rank.subrank = distance_to_ancestor (parm, arg, 0);
3652 if (rank.subrank >= 0)
3653 return sum_ranks (BASE_CONVERSION_BADNESS, rank);
3654 /* else fall through */
3656 return INCOMPATIBLE_TYPE_BADNESS;
3659 case TYPE_CODE_UNION:
3660 switch (TYPE_CODE (arg))
3662 case TYPE_CODE_UNION:
3664 return INCOMPATIBLE_TYPE_BADNESS;
3667 case TYPE_CODE_MEMBERPTR:
3668 switch (TYPE_CODE (arg))
3671 return INCOMPATIBLE_TYPE_BADNESS;
3674 case TYPE_CODE_METHOD:
3675 switch (TYPE_CODE (arg))
3679 return INCOMPATIBLE_TYPE_BADNESS;
3683 switch (TYPE_CODE (arg))
3687 return INCOMPATIBLE_TYPE_BADNESS;
3692 switch (TYPE_CODE (arg))
3696 return rank_one_type (TYPE_FIELD_TYPE (parm, 0),
3697 TYPE_FIELD_TYPE (arg, 0), NULL);
3699 return INCOMPATIBLE_TYPE_BADNESS;
3702 case TYPE_CODE_VOID:
3704 return INCOMPATIBLE_TYPE_BADNESS;
3705 } /* switch (TYPE_CODE (arg)) */
3708 /* End of functions for overload resolution. */
3710 /* Routines to pretty-print types. */
3713 print_bit_vector (B_TYPE *bits, int nbits)
3717 for (bitno = 0; bitno < nbits; bitno++)
3719 if ((bitno % 8) == 0)
3721 puts_filtered (" ");
3723 if (B_TST (bits, bitno))
3724 printf_filtered (("1"));
3726 printf_filtered (("0"));
3730 /* Note the first arg should be the "this" pointer, we may not want to
3731 include it since we may get into a infinitely recursive
3735 print_args (struct field *args, int nargs, int spaces)
3741 for (i = 0; i < nargs; i++)
3743 printfi_filtered (spaces, "[%d] name '%s'\n", i,
3744 args[i].name != NULL ? args[i].name : "<NULL>");
3745 recursive_dump_type (args[i].type, spaces + 2);
3751 field_is_static (struct field *f)
3753 /* "static" fields are the fields whose location is not relative
3754 to the address of the enclosing struct. It would be nice to
3755 have a dedicated flag that would be set for static fields when
3756 the type is being created. But in practice, checking the field
3757 loc_kind should give us an accurate answer. */
3758 return (FIELD_LOC_KIND (*f) == FIELD_LOC_KIND_PHYSNAME
3759 || FIELD_LOC_KIND (*f) == FIELD_LOC_KIND_PHYSADDR);
3763 dump_fn_fieldlists (struct type *type, int spaces)
3769 printfi_filtered (spaces, "fn_fieldlists ");
3770 gdb_print_host_address (TYPE_FN_FIELDLISTS (type), gdb_stdout);
3771 printf_filtered ("\n");
3772 for (method_idx = 0; method_idx < TYPE_NFN_FIELDS (type); method_idx++)
3774 f = TYPE_FN_FIELDLIST1 (type, method_idx);
3775 printfi_filtered (spaces + 2, "[%d] name '%s' (",
3777 TYPE_FN_FIELDLIST_NAME (type, method_idx));
3778 gdb_print_host_address (TYPE_FN_FIELDLIST_NAME (type, method_idx),
3780 printf_filtered (_(") length %d\n"),
3781 TYPE_FN_FIELDLIST_LENGTH (type, method_idx));
3782 for (overload_idx = 0;
3783 overload_idx < TYPE_FN_FIELDLIST_LENGTH (type, method_idx);
3786 printfi_filtered (spaces + 4, "[%d] physname '%s' (",
3788 TYPE_FN_FIELD_PHYSNAME (f, overload_idx));
3789 gdb_print_host_address (TYPE_FN_FIELD_PHYSNAME (f, overload_idx),
3791 printf_filtered (")\n");
3792 printfi_filtered (spaces + 8, "type ");
3793 gdb_print_host_address (TYPE_FN_FIELD_TYPE (f, overload_idx),
3795 printf_filtered ("\n");
3797 recursive_dump_type (TYPE_FN_FIELD_TYPE (f, overload_idx),
3800 printfi_filtered (spaces + 8, "args ");
3801 gdb_print_host_address (TYPE_FN_FIELD_ARGS (f, overload_idx),
3803 printf_filtered ("\n");
3804 print_args (TYPE_FN_FIELD_ARGS (f, overload_idx),
3805 TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f, overload_idx)),
3807 printfi_filtered (spaces + 8, "fcontext ");
3808 gdb_print_host_address (TYPE_FN_FIELD_FCONTEXT (f, overload_idx),
3810 printf_filtered ("\n");
3812 printfi_filtered (spaces + 8, "is_const %d\n",
3813 TYPE_FN_FIELD_CONST (f, overload_idx));
3814 printfi_filtered (spaces + 8, "is_volatile %d\n",
3815 TYPE_FN_FIELD_VOLATILE (f, overload_idx));
3816 printfi_filtered (spaces + 8, "is_private %d\n",
3817 TYPE_FN_FIELD_PRIVATE (f, overload_idx));
3818 printfi_filtered (spaces + 8, "is_protected %d\n",
3819 TYPE_FN_FIELD_PROTECTED (f, overload_idx));
3820 printfi_filtered (spaces + 8, "is_stub %d\n",
3821 TYPE_FN_FIELD_STUB (f, overload_idx));
3822 printfi_filtered (spaces + 8, "voffset %u\n",
3823 TYPE_FN_FIELD_VOFFSET (f, overload_idx));
3829 print_cplus_stuff (struct type *type, int spaces)
3831 printfi_filtered (spaces, "vptr_fieldno %d\n", TYPE_VPTR_FIELDNO (type));
3832 printfi_filtered (spaces, "vptr_basetype ");
3833 gdb_print_host_address (TYPE_VPTR_BASETYPE (type), gdb_stdout);
3834 puts_filtered ("\n");
3835 if (TYPE_VPTR_BASETYPE (type) != NULL)
3836 recursive_dump_type (TYPE_VPTR_BASETYPE (type), spaces + 2);
3838 printfi_filtered (spaces, "n_baseclasses %d\n",
3839 TYPE_N_BASECLASSES (type));
3840 printfi_filtered (spaces, "nfn_fields %d\n",
3841 TYPE_NFN_FIELDS (type));
3842 if (TYPE_N_BASECLASSES (type) > 0)
3844 printfi_filtered (spaces, "virtual_field_bits (%d bits at *",
3845 TYPE_N_BASECLASSES (type));
3846 gdb_print_host_address (TYPE_FIELD_VIRTUAL_BITS (type),
3848 printf_filtered (")");
3850 print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type),
3851 TYPE_N_BASECLASSES (type));
3852 puts_filtered ("\n");
3854 if (TYPE_NFIELDS (type) > 0)
3856 if (TYPE_FIELD_PRIVATE_BITS (type) != NULL)
3858 printfi_filtered (spaces,
3859 "private_field_bits (%d bits at *",
3860 TYPE_NFIELDS (type));
3861 gdb_print_host_address (TYPE_FIELD_PRIVATE_BITS (type),
3863 printf_filtered (")");
3864 print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type),
3865 TYPE_NFIELDS (type));
3866 puts_filtered ("\n");
3868 if (TYPE_FIELD_PROTECTED_BITS (type) != NULL)
3870 printfi_filtered (spaces,
3871 "protected_field_bits (%d bits at *",
3872 TYPE_NFIELDS (type));
3873 gdb_print_host_address (TYPE_FIELD_PROTECTED_BITS (type),
3875 printf_filtered (")");
3876 print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type),
3877 TYPE_NFIELDS (type));
3878 puts_filtered ("\n");
3881 if (TYPE_NFN_FIELDS (type) > 0)
3883 dump_fn_fieldlists (type, spaces);
3887 /* Print the contents of the TYPE's type_specific union, assuming that
3888 its type-specific kind is TYPE_SPECIFIC_GNAT_STUFF. */
3891 print_gnat_stuff (struct type *type, int spaces)
3893 struct type *descriptive_type = TYPE_DESCRIPTIVE_TYPE (type);
3895 if (descriptive_type == NULL)
3896 printfi_filtered (spaces + 2, "no descriptive type\n");
3899 printfi_filtered (spaces + 2, "descriptive type\n");
3900 recursive_dump_type (descriptive_type, spaces + 4);
3904 static struct obstack dont_print_type_obstack;
3907 recursive_dump_type (struct type *type, int spaces)
3912 obstack_begin (&dont_print_type_obstack, 0);
3914 if (TYPE_NFIELDS (type) > 0
3915 || (HAVE_CPLUS_STRUCT (type) && TYPE_NFN_FIELDS (type) > 0))
3917 struct type **first_dont_print
3918 = (struct type **) obstack_base (&dont_print_type_obstack);
3920 int i = (struct type **)
3921 obstack_next_free (&dont_print_type_obstack) - first_dont_print;
3925 if (type == first_dont_print[i])
3927 printfi_filtered (spaces, "type node ");
3928 gdb_print_host_address (type, gdb_stdout);
3929 printf_filtered (_(" <same as already seen type>\n"));
3934 obstack_ptr_grow (&dont_print_type_obstack, type);
3937 printfi_filtered (spaces, "type node ");
3938 gdb_print_host_address (type, gdb_stdout);
3939 printf_filtered ("\n");
3940 printfi_filtered (spaces, "name '%s' (",
3941 TYPE_NAME (type) ? TYPE_NAME (type) : "<NULL>");
3942 gdb_print_host_address (TYPE_NAME (type), gdb_stdout);
3943 printf_filtered (")\n");
3944 printfi_filtered (spaces, "tagname '%s' (",
3945 TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : "<NULL>");
3946 gdb_print_host_address (TYPE_TAG_NAME (type), gdb_stdout);
3947 printf_filtered (")\n");
3948 printfi_filtered (spaces, "code 0x%x ", TYPE_CODE (type));
3949 switch (TYPE_CODE (type))
3951 case TYPE_CODE_UNDEF:
3952 printf_filtered ("(TYPE_CODE_UNDEF)");
3955 printf_filtered ("(TYPE_CODE_PTR)");
3957 case TYPE_CODE_ARRAY:
3958 printf_filtered ("(TYPE_CODE_ARRAY)");
3960 case TYPE_CODE_STRUCT:
3961 printf_filtered ("(TYPE_CODE_STRUCT)");
3963 case TYPE_CODE_UNION:
3964 printf_filtered ("(TYPE_CODE_UNION)");
3966 case TYPE_CODE_ENUM:
3967 printf_filtered ("(TYPE_CODE_ENUM)");
3969 case TYPE_CODE_FLAGS:
3970 printf_filtered ("(TYPE_CODE_FLAGS)");
3972 case TYPE_CODE_FUNC:
3973 printf_filtered ("(TYPE_CODE_FUNC)");
3976 printf_filtered ("(TYPE_CODE_INT)");
3979 printf_filtered ("(TYPE_CODE_FLT)");
3981 case TYPE_CODE_VOID:
3982 printf_filtered ("(TYPE_CODE_VOID)");
3985 printf_filtered ("(TYPE_CODE_SET)");
3987 case TYPE_CODE_RANGE:
3988 printf_filtered ("(TYPE_CODE_RANGE)");
3990 case TYPE_CODE_STRING:
3991 printf_filtered ("(TYPE_CODE_STRING)");
3993 case TYPE_CODE_ERROR:
3994 printf_filtered ("(TYPE_CODE_ERROR)");
3996 case TYPE_CODE_MEMBERPTR:
3997 printf_filtered ("(TYPE_CODE_MEMBERPTR)");
3999 case TYPE_CODE_METHODPTR:
4000 printf_filtered ("(TYPE_CODE_METHODPTR)");
4002 case TYPE_CODE_METHOD:
4003 printf_filtered ("(TYPE_CODE_METHOD)");
4006 printf_filtered ("(TYPE_CODE_REF)");
4008 case TYPE_CODE_CHAR:
4009 printf_filtered ("(TYPE_CODE_CHAR)");
4011 case TYPE_CODE_BOOL:
4012 printf_filtered ("(TYPE_CODE_BOOL)");
4014 case TYPE_CODE_COMPLEX:
4015 printf_filtered ("(TYPE_CODE_COMPLEX)");
4017 case TYPE_CODE_TYPEDEF:
4018 printf_filtered ("(TYPE_CODE_TYPEDEF)");
4020 case TYPE_CODE_NAMESPACE:
4021 printf_filtered ("(TYPE_CODE_NAMESPACE)");
4024 printf_filtered ("(UNKNOWN TYPE CODE)");
4027 puts_filtered ("\n");
4028 printfi_filtered (spaces, "length %d\n", TYPE_LENGTH (type));
4029 if (TYPE_OBJFILE_OWNED (type))
4031 printfi_filtered (spaces, "objfile ");
4032 gdb_print_host_address (TYPE_OWNER (type).objfile, gdb_stdout);
4036 printfi_filtered (spaces, "gdbarch ");
4037 gdb_print_host_address (TYPE_OWNER (type).gdbarch, gdb_stdout);
4039 printf_filtered ("\n");
4040 printfi_filtered (spaces, "target_type ");
4041 gdb_print_host_address (TYPE_TARGET_TYPE (type), gdb_stdout);
4042 printf_filtered ("\n");
4043 if (TYPE_TARGET_TYPE (type) != NULL)
4045 recursive_dump_type (TYPE_TARGET_TYPE (type), spaces + 2);
4047 printfi_filtered (spaces, "pointer_type ");
4048 gdb_print_host_address (TYPE_POINTER_TYPE (type), gdb_stdout);
4049 printf_filtered ("\n");
4050 printfi_filtered (spaces, "reference_type ");
4051 gdb_print_host_address (TYPE_REFERENCE_TYPE (type), gdb_stdout);
4052 printf_filtered ("\n");
4053 printfi_filtered (spaces, "type_chain ");
4054 gdb_print_host_address (TYPE_CHAIN (type), gdb_stdout);
4055 printf_filtered ("\n");
4056 printfi_filtered (spaces, "instance_flags 0x%x",
4057 TYPE_INSTANCE_FLAGS (type));
4058 if (TYPE_CONST (type))
4060 puts_filtered (" TYPE_FLAG_CONST");
4062 if (TYPE_VOLATILE (type))
4064 puts_filtered (" TYPE_FLAG_VOLATILE");
4066 if (TYPE_CODE_SPACE (type))
4068 puts_filtered (" TYPE_FLAG_CODE_SPACE");
4070 if (TYPE_DATA_SPACE (type))
4072 puts_filtered (" TYPE_FLAG_DATA_SPACE");
4074 if (TYPE_ADDRESS_CLASS_1 (type))
4076 puts_filtered (" TYPE_FLAG_ADDRESS_CLASS_1");
4078 if (TYPE_ADDRESS_CLASS_2 (type))
4080 puts_filtered (" TYPE_FLAG_ADDRESS_CLASS_2");
4082 if (TYPE_RESTRICT (type))
4084 puts_filtered (" TYPE_FLAG_RESTRICT");
4086 if (TYPE_ATOMIC (type))
4088 puts_filtered (" TYPE_FLAG_ATOMIC");
4090 puts_filtered ("\n");
4092 printfi_filtered (spaces, "flags");
4093 if (TYPE_UNSIGNED (type))
4095 puts_filtered (" TYPE_FLAG_UNSIGNED");
4097 if (TYPE_NOSIGN (type))
4099 puts_filtered (" TYPE_FLAG_NOSIGN");
4101 if (TYPE_STUB (type))
4103 puts_filtered (" TYPE_FLAG_STUB");
4105 if (TYPE_TARGET_STUB (type))
4107 puts_filtered (" TYPE_FLAG_TARGET_STUB");
4109 if (TYPE_STATIC (type))
4111 puts_filtered (" TYPE_FLAG_STATIC");
4113 if (TYPE_PROTOTYPED (type))
4115 puts_filtered (" TYPE_FLAG_PROTOTYPED");
4117 if (TYPE_INCOMPLETE (type))
4119 puts_filtered (" TYPE_FLAG_INCOMPLETE");
4121 if (TYPE_VARARGS (type))
4123 puts_filtered (" TYPE_FLAG_VARARGS");
4125 /* This is used for things like AltiVec registers on ppc. Gcc emits
4126 an attribute for the array type, which tells whether or not we
4127 have a vector, instead of a regular array. */
4128 if (TYPE_VECTOR (type))
4130 puts_filtered (" TYPE_FLAG_VECTOR");
4132 if (TYPE_FIXED_INSTANCE (type))
4134 puts_filtered (" TYPE_FIXED_INSTANCE");
4136 if (TYPE_STUB_SUPPORTED (type))
4138 puts_filtered (" TYPE_STUB_SUPPORTED");
4140 if (TYPE_NOTTEXT (type))
4142 puts_filtered (" TYPE_NOTTEXT");
4144 puts_filtered ("\n");
4145 printfi_filtered (spaces, "nfields %d ", TYPE_NFIELDS (type));
4146 gdb_print_host_address (TYPE_FIELDS (type), gdb_stdout);
4147 puts_filtered ("\n");
4148 for (idx = 0; idx < TYPE_NFIELDS (type); idx++)
4150 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
4151 printfi_filtered (spaces + 2,
4152 "[%d] enumval %s type ",
4153 idx, plongest (TYPE_FIELD_ENUMVAL (type, idx)));
4155 printfi_filtered (spaces + 2,
4156 "[%d] bitpos %d bitsize %d type ",
4157 idx, TYPE_FIELD_BITPOS (type, idx),
4158 TYPE_FIELD_BITSIZE (type, idx));
4159 gdb_print_host_address (TYPE_FIELD_TYPE (type, idx), gdb_stdout);
4160 printf_filtered (" name '%s' (",
4161 TYPE_FIELD_NAME (type, idx) != NULL
4162 ? TYPE_FIELD_NAME (type, idx)
4164 gdb_print_host_address (TYPE_FIELD_NAME (type, idx), gdb_stdout);
4165 printf_filtered (")\n");
4166 if (TYPE_FIELD_TYPE (type, idx) != NULL)
4168 recursive_dump_type (TYPE_FIELD_TYPE (type, idx), spaces + 4);
4171 if (TYPE_CODE (type) == TYPE_CODE_RANGE)
4173 printfi_filtered (spaces, "low %s%s high %s%s\n",
4174 plongest (TYPE_LOW_BOUND (type)),
4175 TYPE_LOW_BOUND_UNDEFINED (type) ? " (undefined)" : "",
4176 plongest (TYPE_HIGH_BOUND (type)),
4177 TYPE_HIGH_BOUND_UNDEFINED (type)
4178 ? " (undefined)" : "");
4181 switch (TYPE_SPECIFIC_FIELD (type))
4183 case TYPE_SPECIFIC_CPLUS_STUFF:
4184 printfi_filtered (spaces, "cplus_stuff ");
4185 gdb_print_host_address (TYPE_CPLUS_SPECIFIC (type),
4187 puts_filtered ("\n");
4188 print_cplus_stuff (type, spaces);
4191 case TYPE_SPECIFIC_GNAT_STUFF:
4192 printfi_filtered (spaces, "gnat_stuff ");
4193 gdb_print_host_address (TYPE_GNAT_SPECIFIC (type), gdb_stdout);
4194 puts_filtered ("\n");
4195 print_gnat_stuff (type, spaces);
4198 case TYPE_SPECIFIC_FLOATFORMAT:
4199 printfi_filtered (spaces, "floatformat ");
4200 if (TYPE_FLOATFORMAT (type) == NULL)
4201 puts_filtered ("(null)");
4204 puts_filtered ("{ ");
4205 if (TYPE_FLOATFORMAT (type)[0] == NULL
4206 || TYPE_FLOATFORMAT (type)[0]->name == NULL)
4207 puts_filtered ("(null)");
4209 puts_filtered (TYPE_FLOATFORMAT (type)[0]->name);
4211 puts_filtered (", ");
4212 if (TYPE_FLOATFORMAT (type)[1] == NULL
4213 || TYPE_FLOATFORMAT (type)[1]->name == NULL)
4214 puts_filtered ("(null)");
4216 puts_filtered (TYPE_FLOATFORMAT (type)[1]->name);
4218 puts_filtered (" }");
4220 puts_filtered ("\n");
4223 case TYPE_SPECIFIC_FUNC:
4224 printfi_filtered (spaces, "calling_convention %d\n",
4225 TYPE_CALLING_CONVENTION (type));
4226 /* tail_call_list is not printed. */
4229 case TYPE_SPECIFIC_SELF_TYPE:
4230 printfi_filtered (spaces, "self_type ");
4231 gdb_print_host_address (TYPE_SELF_TYPE (type), gdb_stdout);
4232 puts_filtered ("\n");
4237 obstack_free (&dont_print_type_obstack, NULL);
4240 /* Trivial helpers for the libiberty hash table, for mapping one
4245 struct type *old, *newobj;
4249 type_pair_hash (const void *item)
4251 const struct type_pair *pair = item;
4253 return htab_hash_pointer (pair->old);
4257 type_pair_eq (const void *item_lhs, const void *item_rhs)
4259 const struct type_pair *lhs = item_lhs, *rhs = item_rhs;
4261 return lhs->old == rhs->old;
4264 /* Allocate the hash table used by copy_type_recursive to walk
4265 types without duplicates. We use OBJFILE's obstack, because
4266 OBJFILE is about to be deleted. */
4269 create_copied_types_hash (struct objfile *objfile)
4271 return htab_create_alloc_ex (1, type_pair_hash, type_pair_eq,
4272 NULL, &objfile->objfile_obstack,
4273 hashtab_obstack_allocate,
4274 dummy_obstack_deallocate);
4277 /* Recursively copy (deep copy) a dynamic attribute list of a type. */
4279 static struct dynamic_prop_list *
4280 copy_dynamic_prop_list (struct obstack *objfile_obstack,
4281 struct dynamic_prop_list *list)
4283 struct dynamic_prop_list *copy = list;
4284 struct dynamic_prop_list **node_ptr = ©
4286 while (*node_ptr != NULL)
4288 struct dynamic_prop_list *node_copy;
4290 node_copy = obstack_copy (objfile_obstack, *node_ptr,
4291 sizeof (struct dynamic_prop_list));
4292 node_copy->prop = (*node_ptr)->prop;
4293 *node_ptr = node_copy;
4295 node_ptr = &node_copy->next;
4301 /* Recursively copy (deep copy) TYPE, if it is associated with
4302 OBJFILE. Return a new type allocated using malloc, a saved type if
4303 we have already visited TYPE (using COPIED_TYPES), or TYPE if it is
4304 not associated with OBJFILE. */
4307 copy_type_recursive (struct objfile *objfile,
4309 htab_t copied_types)
4311 struct type_pair *stored, pair;
4313 struct type *new_type;
4315 if (! TYPE_OBJFILE_OWNED (type))
4318 /* This type shouldn't be pointing to any types in other objfiles;
4319 if it did, the type might disappear unexpectedly. */
4320 gdb_assert (TYPE_OBJFILE (type) == objfile);
4323 slot = htab_find_slot (copied_types, &pair, INSERT);
4325 return ((struct type_pair *) *slot)->newobj;
4327 new_type = alloc_type_arch (get_type_arch (type));
4329 /* We must add the new type to the hash table immediately, in case
4330 we encounter this type again during a recursive call below. */
4332 = obstack_alloc (&objfile->objfile_obstack, sizeof (struct type_pair));
4334 stored->newobj = new_type;
4337 /* Copy the common fields of types. For the main type, we simply
4338 copy the entire thing and then update specific fields as needed. */
4339 *TYPE_MAIN_TYPE (new_type) = *TYPE_MAIN_TYPE (type);
4340 TYPE_OBJFILE_OWNED (new_type) = 0;
4341 TYPE_OWNER (new_type).gdbarch = get_type_arch (type);
4343 if (TYPE_NAME (type))
4344 TYPE_NAME (new_type) = xstrdup (TYPE_NAME (type));
4345 if (TYPE_TAG_NAME (type))
4346 TYPE_TAG_NAME (new_type) = xstrdup (TYPE_TAG_NAME (type));
4348 TYPE_INSTANCE_FLAGS (new_type) = TYPE_INSTANCE_FLAGS (type);
4349 TYPE_LENGTH (new_type) = TYPE_LENGTH (type);
4351 /* Copy the fields. */
4352 if (TYPE_NFIELDS (type))
4356 nfields = TYPE_NFIELDS (type);
4357 TYPE_FIELDS (new_type) = XCNEWVEC (struct field, nfields);
4358 for (i = 0; i < nfields; i++)
4360 TYPE_FIELD_ARTIFICIAL (new_type, i) =
4361 TYPE_FIELD_ARTIFICIAL (type, i);
4362 TYPE_FIELD_BITSIZE (new_type, i) = TYPE_FIELD_BITSIZE (type, i);
4363 if (TYPE_FIELD_TYPE (type, i))
4364 TYPE_FIELD_TYPE (new_type, i)
4365 = copy_type_recursive (objfile, TYPE_FIELD_TYPE (type, i),
4367 if (TYPE_FIELD_NAME (type, i))
4368 TYPE_FIELD_NAME (new_type, i) =
4369 xstrdup (TYPE_FIELD_NAME (type, i));
4370 switch (TYPE_FIELD_LOC_KIND (type, i))
4372 case FIELD_LOC_KIND_BITPOS:
4373 SET_FIELD_BITPOS (TYPE_FIELD (new_type, i),
4374 TYPE_FIELD_BITPOS (type, i));
4376 case FIELD_LOC_KIND_ENUMVAL:
4377 SET_FIELD_ENUMVAL (TYPE_FIELD (new_type, i),
4378 TYPE_FIELD_ENUMVAL (type, i));
4380 case FIELD_LOC_KIND_PHYSADDR:
4381 SET_FIELD_PHYSADDR (TYPE_FIELD (new_type, i),
4382 TYPE_FIELD_STATIC_PHYSADDR (type, i));
4384 case FIELD_LOC_KIND_PHYSNAME:
4385 SET_FIELD_PHYSNAME (TYPE_FIELD (new_type, i),
4386 xstrdup (TYPE_FIELD_STATIC_PHYSNAME (type,
4390 internal_error (__FILE__, __LINE__,
4391 _("Unexpected type field location kind: %d"),
4392 TYPE_FIELD_LOC_KIND (type, i));
4397 /* For range types, copy the bounds information. */
4398 if (TYPE_CODE (type) == TYPE_CODE_RANGE)
4400 TYPE_RANGE_DATA (new_type) = xmalloc (sizeof (struct range_bounds));
4401 *TYPE_RANGE_DATA (new_type) = *TYPE_RANGE_DATA (type);
4404 if (TYPE_DYN_PROP_LIST (type) != NULL)
4405 TYPE_DYN_PROP_LIST (new_type)
4406 = copy_dynamic_prop_list (&objfile->objfile_obstack,
4407 TYPE_DYN_PROP_LIST (type));
4410 /* Copy pointers to other types. */
4411 if (TYPE_TARGET_TYPE (type))
4412 TYPE_TARGET_TYPE (new_type) =
4413 copy_type_recursive (objfile,
4414 TYPE_TARGET_TYPE (type),
4417 /* Maybe copy the type_specific bits.
4419 NOTE drow/2005-12-09: We do not copy the C++-specific bits like
4420 base classes and methods. There's no fundamental reason why we
4421 can't, but at the moment it is not needed. */
4423 switch (TYPE_SPECIFIC_FIELD (type))
4425 case TYPE_SPECIFIC_NONE:
4427 case TYPE_SPECIFIC_FUNC:
4428 INIT_FUNC_SPECIFIC (new_type);
4429 TYPE_CALLING_CONVENTION (new_type) = TYPE_CALLING_CONVENTION (type);
4430 TYPE_NO_RETURN (new_type) = TYPE_NO_RETURN (type);
4431 TYPE_TAIL_CALL_LIST (new_type) = NULL;
4433 case TYPE_SPECIFIC_FLOATFORMAT:
4434 TYPE_FLOATFORMAT (new_type) = TYPE_FLOATFORMAT (type);
4436 case TYPE_SPECIFIC_CPLUS_STUFF:
4437 INIT_CPLUS_SPECIFIC (new_type);
4439 case TYPE_SPECIFIC_GNAT_STUFF:
4440 INIT_GNAT_SPECIFIC (new_type);
4442 case TYPE_SPECIFIC_SELF_TYPE:
4443 set_type_self_type (new_type,
4444 copy_type_recursive (objfile, TYPE_SELF_TYPE (type),
4448 gdb_assert_not_reached ("bad type_specific_kind");
4454 /* Make a copy of the given TYPE, except that the pointer & reference
4455 types are not preserved.
4457 This function assumes that the given type has an associated objfile.
4458 This objfile is used to allocate the new type. */
4461 copy_type (const struct type *type)
4463 struct type *new_type;
4465 gdb_assert (TYPE_OBJFILE_OWNED (type));
4467 new_type = alloc_type_copy (type);
4468 TYPE_INSTANCE_FLAGS (new_type) = TYPE_INSTANCE_FLAGS (type);
4469 TYPE_LENGTH (new_type) = TYPE_LENGTH (type);
4470 memcpy (TYPE_MAIN_TYPE (new_type), TYPE_MAIN_TYPE (type),
4471 sizeof (struct main_type));
4472 if (TYPE_DYN_PROP_LIST (type) != NULL)
4473 TYPE_DYN_PROP_LIST (new_type)
4474 = copy_dynamic_prop_list (&TYPE_OBJFILE (type) -> objfile_obstack,
4475 TYPE_DYN_PROP_LIST (type));
4480 /* Helper functions to initialize architecture-specific types. */
4482 /* Allocate a type structure associated with GDBARCH and set its
4483 CODE, LENGTH, and NAME fields. */
4486 arch_type (struct gdbarch *gdbarch,
4487 enum type_code code, int length, char *name)
4491 type = alloc_type_arch (gdbarch);
4492 TYPE_CODE (type) = code;
4493 TYPE_LENGTH (type) = length;
4496 TYPE_NAME (type) = xstrdup (name);
4501 /* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
4502 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
4503 the type's TYPE_UNSIGNED flag. NAME is the type name. */
4506 arch_integer_type (struct gdbarch *gdbarch,
4507 int bit, int unsigned_p, char *name)
4511 t = arch_type (gdbarch, TYPE_CODE_INT, bit / TARGET_CHAR_BIT, name);
4513 TYPE_UNSIGNED (t) = 1;
4514 if (name && strcmp (name, "char") == 0)
4515 TYPE_NOSIGN (t) = 1;
4520 /* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
4521 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
4522 the type's TYPE_UNSIGNED flag. NAME is the type name. */
4525 arch_character_type (struct gdbarch *gdbarch,
4526 int bit, int unsigned_p, char *name)
4530 t = arch_type (gdbarch, TYPE_CODE_CHAR, bit / TARGET_CHAR_BIT, name);
4532 TYPE_UNSIGNED (t) = 1;
4537 /* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
4538 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
4539 the type's TYPE_UNSIGNED flag. NAME is the type name. */
4542 arch_boolean_type (struct gdbarch *gdbarch,
4543 int bit, int unsigned_p, char *name)
4547 t = arch_type (gdbarch, TYPE_CODE_BOOL, bit / TARGET_CHAR_BIT, name);
4549 TYPE_UNSIGNED (t) = 1;
4554 /* Allocate a TYPE_CODE_FLT type structure associated with GDBARCH.
4555 BIT is the type size in bits; if BIT equals -1, the size is
4556 determined by the floatformat. NAME is the type name. Set the
4557 TYPE_FLOATFORMAT from FLOATFORMATS. */
4560 arch_float_type (struct gdbarch *gdbarch,
4561 int bit, char *name, const struct floatformat **floatformats)
4567 gdb_assert (floatformats != NULL);
4568 gdb_assert (floatformats[0] != NULL && floatformats[1] != NULL);
4569 bit = floatformats[0]->totalsize;
4571 gdb_assert (bit >= 0);
4573 t = arch_type (gdbarch, TYPE_CODE_FLT, bit / TARGET_CHAR_BIT, name);
4574 TYPE_FLOATFORMAT (t) = floatformats;
4578 /* Allocate a TYPE_CODE_COMPLEX type structure associated with GDBARCH.
4579 NAME is the type name. TARGET_TYPE is the component float type. */
4582 arch_complex_type (struct gdbarch *gdbarch,
4583 char *name, struct type *target_type)
4587 t = arch_type (gdbarch, TYPE_CODE_COMPLEX,
4588 2 * TYPE_LENGTH (target_type), name);
4589 TYPE_TARGET_TYPE (t) = target_type;
4593 /* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
4594 NAME is the type name. LENGTH is the size of the flag word in bytes. */
4597 arch_flags_type (struct gdbarch *gdbarch, char *name, int length)
4599 int nfields = length * TARGET_CHAR_BIT;
4602 type = arch_type (gdbarch, TYPE_CODE_FLAGS, length, name);
4603 TYPE_UNSIGNED (type) = 1;
4604 TYPE_NFIELDS (type) = nfields;
4605 TYPE_FIELDS (type) = TYPE_ZALLOC (type, nfields * sizeof (struct field));
4610 /* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
4611 position BITPOS is called NAME. */
4614 append_flags_type_flag (struct type *type, int bitpos, char *name)
4616 gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLAGS);
4617 gdb_assert (bitpos < TYPE_NFIELDS (type));
4618 gdb_assert (bitpos >= 0);
4622 TYPE_FIELD_NAME (type, bitpos) = xstrdup (name);
4623 SET_FIELD_BITPOS (TYPE_FIELD (type, bitpos), bitpos);
4627 /* Don't show this field to the user. */
4628 SET_FIELD_BITPOS (TYPE_FIELD (type, bitpos), -1);
4632 /* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
4633 specified by CODE) associated with GDBARCH. NAME is the type name. */
4636 arch_composite_type (struct gdbarch *gdbarch, char *name, enum type_code code)
4640 gdb_assert (code == TYPE_CODE_STRUCT || code == TYPE_CODE_UNION);
4641 t = arch_type (gdbarch, code, 0, NULL);
4642 TYPE_TAG_NAME (t) = name;
4643 INIT_CPLUS_SPECIFIC (t);
4647 /* Add new field with name NAME and type FIELD to composite type T.
4648 Do not set the field's position or adjust the type's length;
4649 the caller should do so. Return the new field. */
4652 append_composite_type_field_raw (struct type *t, char *name,
4657 TYPE_NFIELDS (t) = TYPE_NFIELDS (t) + 1;
4658 TYPE_FIELDS (t) = xrealloc (TYPE_FIELDS (t),
4659 sizeof (struct field) * TYPE_NFIELDS (t));
4660 f = &(TYPE_FIELDS (t)[TYPE_NFIELDS (t) - 1]);
4661 memset (f, 0, sizeof f[0]);
4662 FIELD_TYPE (f[0]) = field;
4663 FIELD_NAME (f[0]) = name;
4667 /* Add new field with name NAME and type FIELD to composite type T.
4668 ALIGNMENT (if non-zero) specifies the minimum field alignment. */
4671 append_composite_type_field_aligned (struct type *t, char *name,
4672 struct type *field, int alignment)
4674 struct field *f = append_composite_type_field_raw (t, name, field);
4676 if (TYPE_CODE (t) == TYPE_CODE_UNION)
4678 if (TYPE_LENGTH (t) < TYPE_LENGTH (field))
4679 TYPE_LENGTH (t) = TYPE_LENGTH (field);
4681 else if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
4683 TYPE_LENGTH (t) = TYPE_LENGTH (t) + TYPE_LENGTH (field);
4684 if (TYPE_NFIELDS (t) > 1)
4686 SET_FIELD_BITPOS (f[0],
4687 (FIELD_BITPOS (f[-1])
4688 + (TYPE_LENGTH (FIELD_TYPE (f[-1]))
4689 * TARGET_CHAR_BIT)));
4695 alignment *= TARGET_CHAR_BIT;
4696 left = FIELD_BITPOS (f[0]) % alignment;
4700 SET_FIELD_BITPOS (f[0], FIELD_BITPOS (f[0]) + (alignment - left));
4701 TYPE_LENGTH (t) += (alignment - left) / TARGET_CHAR_BIT;
4708 /* Add new field with name NAME and type FIELD to composite type T. */
4711 append_composite_type_field (struct type *t, char *name,
4714 append_composite_type_field_aligned (t, name, field, 0);
4717 static struct gdbarch_data *gdbtypes_data;
4719 const struct builtin_type *
4720 builtin_type (struct gdbarch *gdbarch)
4722 return gdbarch_data (gdbarch, gdbtypes_data);
4726 gdbtypes_post_init (struct gdbarch *gdbarch)
4728 struct builtin_type *builtin_type
4729 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_type);
4732 builtin_type->builtin_void
4733 = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
4734 builtin_type->builtin_char
4735 = arch_integer_type (gdbarch, TARGET_CHAR_BIT,
4736 !gdbarch_char_signed (gdbarch), "char");
4737 builtin_type->builtin_signed_char
4738 = arch_integer_type (gdbarch, TARGET_CHAR_BIT,
4740 builtin_type->builtin_unsigned_char
4741 = arch_integer_type (gdbarch, TARGET_CHAR_BIT,
4742 1, "unsigned char");
4743 builtin_type->builtin_short
4744 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch),
4746 builtin_type->builtin_unsigned_short
4747 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch),
4748 1, "unsigned short");
4749 builtin_type->builtin_int
4750 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
4752 builtin_type->builtin_unsigned_int
4753 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
4755 builtin_type->builtin_long
4756 = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
4758 builtin_type->builtin_unsigned_long
4759 = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
4760 1, "unsigned long");
4761 builtin_type->builtin_long_long
4762 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch),
4764 builtin_type->builtin_unsigned_long_long
4765 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch),
4766 1, "unsigned long long");
4767 builtin_type->builtin_float
4768 = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
4769 "float", gdbarch_float_format (gdbarch));
4770 builtin_type->builtin_double
4771 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
4772 "double", gdbarch_double_format (gdbarch));
4773 builtin_type->builtin_long_double
4774 = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
4775 "long double", gdbarch_long_double_format (gdbarch));
4776 builtin_type->builtin_complex
4777 = arch_complex_type (gdbarch, "complex",
4778 builtin_type->builtin_float);
4779 builtin_type->builtin_double_complex
4780 = arch_complex_type (gdbarch, "double complex",
4781 builtin_type->builtin_double);
4782 builtin_type->builtin_string
4783 = arch_type (gdbarch, TYPE_CODE_STRING, 1, "string");
4784 builtin_type->builtin_bool
4785 = arch_type (gdbarch, TYPE_CODE_BOOL, 1, "bool");
4787 /* The following three are about decimal floating point types, which
4788 are 32-bits, 64-bits and 128-bits respectively. */
4789 builtin_type->builtin_decfloat
4790 = arch_type (gdbarch, TYPE_CODE_DECFLOAT, 32 / 8, "_Decimal32");
4791 builtin_type->builtin_decdouble
4792 = arch_type (gdbarch, TYPE_CODE_DECFLOAT, 64 / 8, "_Decimal64");
4793 builtin_type->builtin_declong
4794 = arch_type (gdbarch, TYPE_CODE_DECFLOAT, 128 / 8, "_Decimal128");
4796 /* "True" character types. */
4797 builtin_type->builtin_true_char
4798 = arch_character_type (gdbarch, TARGET_CHAR_BIT, 0, "true character");
4799 builtin_type->builtin_true_unsigned_char
4800 = arch_character_type (gdbarch, TARGET_CHAR_BIT, 1, "true character");
4802 /* Fixed-size integer types. */
4803 builtin_type->builtin_int0
4804 = arch_integer_type (gdbarch, 0, 0, "int0_t");
4805 builtin_type->builtin_int8
4806 = arch_integer_type (gdbarch, 8, 0, "int8_t");
4807 builtin_type->builtin_uint8
4808 = arch_integer_type (gdbarch, 8, 1, "uint8_t");
4809 builtin_type->builtin_int16
4810 = arch_integer_type (gdbarch, 16, 0, "int16_t");
4811 builtin_type->builtin_uint16
4812 = arch_integer_type (gdbarch, 16, 1, "uint16_t");
4813 builtin_type->builtin_int32
4814 = arch_integer_type (gdbarch, 32, 0, "int32_t");
4815 builtin_type->builtin_uint32
4816 = arch_integer_type (gdbarch, 32, 1, "uint32_t");
4817 builtin_type->builtin_int64
4818 = arch_integer_type (gdbarch, 64, 0, "int64_t");
4819 builtin_type->builtin_uint64
4820 = arch_integer_type (gdbarch, 64, 1, "uint64_t");
4821 builtin_type->builtin_int128
4822 = arch_integer_type (gdbarch, 128, 0, "int128_t");
4823 builtin_type->builtin_uint128
4824 = arch_integer_type (gdbarch, 128, 1, "uint128_t");
4825 TYPE_INSTANCE_FLAGS (builtin_type->builtin_int8) |=
4826 TYPE_INSTANCE_FLAG_NOTTEXT;
4827 TYPE_INSTANCE_FLAGS (builtin_type->builtin_uint8) |=
4828 TYPE_INSTANCE_FLAG_NOTTEXT;
4830 /* Wide character types. */
4831 builtin_type->builtin_char16
4832 = arch_integer_type (gdbarch, 16, 0, "char16_t");
4833 builtin_type->builtin_char32
4834 = arch_integer_type (gdbarch, 32, 0, "char32_t");
4837 /* Default data/code pointer types. */
4838 builtin_type->builtin_data_ptr
4839 = lookup_pointer_type (builtin_type->builtin_void);
4840 builtin_type->builtin_func_ptr
4841 = lookup_pointer_type (lookup_function_type (builtin_type->builtin_void));
4842 builtin_type->builtin_func_func
4843 = lookup_function_type (builtin_type->builtin_func_ptr);
4845 /* This type represents a GDB internal function. */
4846 builtin_type->internal_fn
4847 = arch_type (gdbarch, TYPE_CODE_INTERNAL_FUNCTION, 0,
4848 "<internal function>");
4850 /* This type represents an xmethod. */
4851 builtin_type->xmethod
4852 = arch_type (gdbarch, TYPE_CODE_XMETHOD, 0, "<xmethod>");
4854 return builtin_type;
4857 /* This set of objfile-based types is intended to be used by symbol
4858 readers as basic types. */
4860 static const struct objfile_data *objfile_type_data;
4862 const struct objfile_type *
4863 objfile_type (struct objfile *objfile)
4865 struct gdbarch *gdbarch;
4866 struct objfile_type *objfile_type
4867 = objfile_data (objfile, objfile_type_data);
4870 return objfile_type;
4872 objfile_type = OBSTACK_CALLOC (&objfile->objfile_obstack,
4873 1, struct objfile_type);
4875 /* Use the objfile architecture to determine basic type properties. */
4876 gdbarch = get_objfile_arch (objfile);
4879 objfile_type->builtin_void
4880 = init_type (TYPE_CODE_VOID, 1,
4884 objfile_type->builtin_char
4885 = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
4887 | (gdbarch_char_signed (gdbarch) ? 0 : TYPE_FLAG_UNSIGNED)),
4889 objfile_type->builtin_signed_char
4890 = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
4892 "signed char", objfile);
4893 objfile_type->builtin_unsigned_char
4894 = init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
4896 "unsigned char", objfile);
4897 objfile_type->builtin_short
4898 = init_type (TYPE_CODE_INT,
4899 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
4900 0, "short", objfile);
4901 objfile_type->builtin_unsigned_short
4902 = init_type (TYPE_CODE_INT,
4903 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
4904 TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
4905 objfile_type->builtin_int
4906 = init_type (TYPE_CODE_INT,
4907 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
4909 objfile_type->builtin_unsigned_int
4910 = init_type (TYPE_CODE_INT,
4911 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
4912 TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
4913 objfile_type->builtin_long
4914 = init_type (TYPE_CODE_INT,
4915 gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT,
4916 0, "long", objfile);
4917 objfile_type->builtin_unsigned_long
4918 = init_type (TYPE_CODE_INT,
4919 gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT,
4920 TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
4921 objfile_type->builtin_long_long
4922 = init_type (TYPE_CODE_INT,
4923 gdbarch_long_long_bit (gdbarch) / TARGET_CHAR_BIT,
4924 0, "long long", objfile);
4925 objfile_type->builtin_unsigned_long_long
4926 = init_type (TYPE_CODE_INT,
4927 gdbarch_long_long_bit (gdbarch) / TARGET_CHAR_BIT,
4928 TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
4930 objfile_type->builtin_float
4931 = init_type (TYPE_CODE_FLT,
4932 gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
4933 0, "float", objfile);
4934 TYPE_FLOATFORMAT (objfile_type->builtin_float)
4935 = gdbarch_float_format (gdbarch);
4936 objfile_type->builtin_double
4937 = init_type (TYPE_CODE_FLT,
4938 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
4939 0, "double", objfile);
4940 TYPE_FLOATFORMAT (objfile_type->builtin_double)
4941 = gdbarch_double_format (gdbarch);
4942 objfile_type->builtin_long_double
4943 = init_type (TYPE_CODE_FLT,
4944 gdbarch_long_double_bit (gdbarch) / TARGET_CHAR_BIT,
4945 0, "long double", objfile);
4946 TYPE_FLOATFORMAT (objfile_type->builtin_long_double)
4947 = gdbarch_long_double_format (gdbarch);
4949 /* This type represents a type that was unrecognized in symbol read-in. */
4950 objfile_type->builtin_error
4951 = init_type (TYPE_CODE_ERROR, 0, 0, "<unknown type>", objfile);
4953 /* The following set of types is used for symbols with no
4954 debug information. */
4955 objfile_type->nodebug_text_symbol
4956 = init_type (TYPE_CODE_FUNC, 1, 0,
4957 "<text variable, no debug info>", objfile);
4958 TYPE_TARGET_TYPE (objfile_type->nodebug_text_symbol)
4959 = objfile_type->builtin_int;
4960 objfile_type->nodebug_text_gnu_ifunc_symbol
4961 = init_type (TYPE_CODE_FUNC, 1, TYPE_FLAG_GNU_IFUNC,
4962 "<text gnu-indirect-function variable, no debug info>",
4964 TYPE_TARGET_TYPE (objfile_type->nodebug_text_gnu_ifunc_symbol)
4965 = objfile_type->nodebug_text_symbol;
4966 objfile_type->nodebug_got_plt_symbol
4967 = init_type (TYPE_CODE_PTR, gdbarch_addr_bit (gdbarch) / 8, 0,
4968 "<text from jump slot in .got.plt, no debug info>",
4970 TYPE_TARGET_TYPE (objfile_type->nodebug_got_plt_symbol)
4971 = objfile_type->nodebug_text_symbol;
4972 objfile_type->nodebug_data_symbol
4973 = init_type (TYPE_CODE_INT,
4974 gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT, 0,
4975 "<data variable, no debug info>", objfile);
4976 objfile_type->nodebug_unknown_symbol
4977 = init_type (TYPE_CODE_INT, 1, 0,
4978 "<variable (not text or data), no debug info>", objfile);
4979 objfile_type->nodebug_tls_symbol
4980 = init_type (TYPE_CODE_INT,
4981 gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT, 0,
4982 "<thread local variable, no debug info>", objfile);
4984 /* NOTE: on some targets, addresses and pointers are not necessarily
4988 - gdb's `struct type' always describes the target's
4990 - gdb's `struct value' objects should always hold values in
4992 - gdb's CORE_ADDR values are addresses in the unified virtual
4993 address space that the assembler and linker work with. Thus,
4994 since target_read_memory takes a CORE_ADDR as an argument, it
4995 can access any memory on the target, even if the processor has
4996 separate code and data address spaces.
4998 In this context, objfile_type->builtin_core_addr is a bit odd:
4999 it's a target type for a value the target will never see. It's
5000 only used to hold the values of (typeless) linker symbols, which
5001 are indeed in the unified virtual address space. */
5003 objfile_type->builtin_core_addr
5004 = init_type (TYPE_CODE_INT,
5005 gdbarch_addr_bit (gdbarch) / 8,
5006 TYPE_FLAG_UNSIGNED, "__CORE_ADDR", objfile);
5008 set_objfile_data (objfile, objfile_type_data, objfile_type);
5009 return objfile_type;
5012 extern initialize_file_ftype _initialize_gdbtypes;
5015 _initialize_gdbtypes (void)
5017 gdbtypes_data = gdbarch_data_register_post_init (gdbtypes_post_init);
5018 objfile_type_data = register_objfile_data ();
5020 add_setshow_zuinteger_cmd ("overload", no_class, &overload_debug,
5021 _("Set debugging of C++ overloading."),
5022 _("Show debugging of C++ overloading."),
5023 _("When enabled, ranking of the "
5024 "functions is displayed."),
5026 show_overload_debug,
5027 &setdebuglist, &showdebuglist);
5029 /* Add user knob for controlling resolution of opaque types. */
5030 add_setshow_boolean_cmd ("opaque-type-resolution", class_support,
5031 &opaque_type_resolution,
5032 _("Set resolution of opaque struct/class/union"
5033 " types (if set before loading symbols)."),
5034 _("Show resolution of opaque struct/class/union"
5035 " types (if set before loading symbols)."),
5037 show_opaque_type_resolution,
5038 &setlist, &showlist);
5040 /* Add an option to permit non-strict type checking. */
5041 add_setshow_boolean_cmd ("type", class_support,
5042 &strict_type_checking,
5043 _("Set strict type checking."),
5044 _("Show strict type checking."),
5046 show_strict_type_checking,
5047 &setchecklist, &showchecklist);