1 /* Support routines for manipulating internal types for GDB.
3 Copyright (C) 1992-2019 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"
41 #include "floatformat.h"
43 /* Initialize BADNESS constants. */
45 const struct rank LENGTH_MISMATCH_BADNESS
= {100,0};
47 const struct rank TOO_FEW_PARAMS_BADNESS
= {100,0};
48 const struct rank INCOMPATIBLE_TYPE_BADNESS
= {100,0};
50 const struct rank EXACT_MATCH_BADNESS
= {0,0};
52 const struct rank INTEGER_PROMOTION_BADNESS
= {1,0};
53 const struct rank FLOAT_PROMOTION_BADNESS
= {1,0};
54 const struct rank BASE_PTR_CONVERSION_BADNESS
= {1,0};
55 const struct rank CV_CONVERSION_BADNESS
= {1, 0};
56 const struct rank INTEGER_CONVERSION_BADNESS
= {2,0};
57 const struct rank FLOAT_CONVERSION_BADNESS
= {2,0};
58 const struct rank INT_FLOAT_CONVERSION_BADNESS
= {2,0};
59 const struct rank VOID_PTR_CONVERSION_BADNESS
= {2,0};
60 const struct rank BOOL_CONVERSION_BADNESS
= {3,0};
61 const struct rank BASE_CONVERSION_BADNESS
= {2,0};
62 const struct rank REFERENCE_CONVERSION_BADNESS
= {2,0};
63 const struct rank NULL_POINTER_CONVERSION_BADNESS
= {2,0};
64 const struct rank NS_POINTER_CONVERSION_BADNESS
= {10,0};
65 const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS
= {3,0};
67 /* Floatformat pairs. */
68 const struct floatformat
*floatformats_ieee_half
[BFD_ENDIAN_UNKNOWN
] = {
69 &floatformat_ieee_half_big
,
70 &floatformat_ieee_half_little
72 const struct floatformat
*floatformats_ieee_single
[BFD_ENDIAN_UNKNOWN
] = {
73 &floatformat_ieee_single_big
,
74 &floatformat_ieee_single_little
76 const struct floatformat
*floatformats_ieee_double
[BFD_ENDIAN_UNKNOWN
] = {
77 &floatformat_ieee_double_big
,
78 &floatformat_ieee_double_little
80 const struct floatformat
*floatformats_ieee_double_littlebyte_bigword
[BFD_ENDIAN_UNKNOWN
] = {
81 &floatformat_ieee_double_big
,
82 &floatformat_ieee_double_littlebyte_bigword
84 const struct floatformat
*floatformats_i387_ext
[BFD_ENDIAN_UNKNOWN
] = {
85 &floatformat_i387_ext
,
88 const struct floatformat
*floatformats_m68881_ext
[BFD_ENDIAN_UNKNOWN
] = {
89 &floatformat_m68881_ext
,
90 &floatformat_m68881_ext
92 const struct floatformat
*floatformats_arm_ext
[BFD_ENDIAN_UNKNOWN
] = {
93 &floatformat_arm_ext_big
,
94 &floatformat_arm_ext_littlebyte_bigword
96 const struct floatformat
*floatformats_ia64_spill
[BFD_ENDIAN_UNKNOWN
] = {
97 &floatformat_ia64_spill_big
,
98 &floatformat_ia64_spill_little
100 const struct floatformat
*floatformats_ia64_quad
[BFD_ENDIAN_UNKNOWN
] = {
101 &floatformat_ia64_quad_big
,
102 &floatformat_ia64_quad_little
104 const struct floatformat
*floatformats_vax_f
[BFD_ENDIAN_UNKNOWN
] = {
108 const struct floatformat
*floatformats_vax_d
[BFD_ENDIAN_UNKNOWN
] = {
112 const struct floatformat
*floatformats_ibm_long_double
[BFD_ENDIAN_UNKNOWN
] = {
113 &floatformat_ibm_long_double_big
,
114 &floatformat_ibm_long_double_little
117 /* Should opaque types be resolved? */
119 static int opaque_type_resolution
= 1;
121 /* A flag to enable printing of debugging information of C++
124 unsigned int overload_debug
= 0;
126 /* A flag to enable strict type checking. */
128 static int strict_type_checking
= 1;
130 /* A function to show whether opaque types are resolved. */
133 show_opaque_type_resolution (struct ui_file
*file
, int from_tty
,
134 struct cmd_list_element
*c
,
137 fprintf_filtered (file
, _("Resolution of opaque struct/class/union types "
138 "(if set before loading symbols) is %s.\n"),
142 /* A function to show whether C++ overload debugging is enabled. */
145 show_overload_debug (struct ui_file
*file
, int from_tty
,
146 struct cmd_list_element
*c
, const char *value
)
148 fprintf_filtered (file
, _("Debugging of C++ overloading is %s.\n"),
152 /* A function to show the status of strict type checking. */
155 show_strict_type_checking (struct ui_file
*file
, int from_tty
,
156 struct cmd_list_element
*c
, const char *value
)
158 fprintf_filtered (file
, _("Strict type checking is %s.\n"), value
);
162 /* Allocate a new OBJFILE-associated type structure and fill it
163 with some defaults. Space for the type structure is allocated
164 on the objfile's objfile_obstack. */
167 alloc_type (struct objfile
*objfile
)
171 gdb_assert (objfile
!= NULL
);
173 /* Alloc the structure and start off with all fields zeroed. */
174 type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct type
);
175 TYPE_MAIN_TYPE (type
) = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
177 OBJSTAT (objfile
, n_types
++);
179 TYPE_OBJFILE_OWNED (type
) = 1;
180 TYPE_OWNER (type
).objfile
= objfile
;
182 /* Initialize the fields that might not be zero. */
184 TYPE_CODE (type
) = TYPE_CODE_UNDEF
;
185 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
190 /* Allocate a new GDBARCH-associated type structure and fill it
191 with some defaults. Space for the type structure is allocated
192 on the obstack associated with GDBARCH. */
195 alloc_type_arch (struct gdbarch
*gdbarch
)
199 gdb_assert (gdbarch
!= NULL
);
201 /* Alloc the structure and start off with all fields zeroed. */
203 type
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct type
);
204 TYPE_MAIN_TYPE (type
) = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct main_type
);
206 TYPE_OBJFILE_OWNED (type
) = 0;
207 TYPE_OWNER (type
).gdbarch
= gdbarch
;
209 /* Initialize the fields that might not be zero. */
211 TYPE_CODE (type
) = TYPE_CODE_UNDEF
;
212 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
217 /* If TYPE is objfile-associated, allocate a new type structure
218 associated with the same objfile. If TYPE is gdbarch-associated,
219 allocate a new type structure associated with the same gdbarch. */
222 alloc_type_copy (const struct type
*type
)
224 if (TYPE_OBJFILE_OWNED (type
))
225 return alloc_type (TYPE_OWNER (type
).objfile
);
227 return alloc_type_arch (TYPE_OWNER (type
).gdbarch
);
230 /* If TYPE is gdbarch-associated, return that architecture.
231 If TYPE is objfile-associated, return that objfile's architecture. */
234 get_type_arch (const struct type
*type
)
236 struct gdbarch
*arch
;
238 if (TYPE_OBJFILE_OWNED (type
))
239 arch
= get_objfile_arch (TYPE_OWNER (type
).objfile
);
241 arch
= TYPE_OWNER (type
).gdbarch
;
243 /* The ARCH can be NULL if TYPE is associated with neither an objfile nor
244 a gdbarch, however, this is very rare, and even then, in most cases
245 that get_type_arch is called, we assume that a non-NULL value is
247 gdb_assert (arch
!= NULL
);
251 /* See gdbtypes.h. */
254 get_target_type (struct type
*type
)
258 type
= TYPE_TARGET_TYPE (type
);
260 type
= check_typedef (type
);
266 /* See gdbtypes.h. */
269 type_length_units (struct type
*type
)
271 struct gdbarch
*arch
= get_type_arch (type
);
272 int unit_size
= gdbarch_addressable_memory_unit_size (arch
);
274 return TYPE_LENGTH (type
) / unit_size
;
277 /* Alloc a new type instance structure, fill it with some defaults,
278 and point it at OLDTYPE. Allocate the new type instance from the
279 same place as OLDTYPE. */
282 alloc_type_instance (struct type
*oldtype
)
286 /* Allocate the structure. */
288 if (! TYPE_OBJFILE_OWNED (oldtype
))
289 type
= GDBARCH_OBSTACK_ZALLOC (get_type_arch (oldtype
), struct type
);
291 type
= OBSTACK_ZALLOC (&TYPE_OBJFILE (oldtype
)->objfile_obstack
,
294 TYPE_MAIN_TYPE (type
) = TYPE_MAIN_TYPE (oldtype
);
296 TYPE_CHAIN (type
) = type
; /* Chain back to itself for now. */
301 /* Clear all remnants of the previous type at TYPE, in preparation for
302 replacing it with something else. Preserve owner information. */
305 smash_type (struct type
*type
)
307 int objfile_owned
= TYPE_OBJFILE_OWNED (type
);
308 union type_owner owner
= TYPE_OWNER (type
);
310 memset (TYPE_MAIN_TYPE (type
), 0, sizeof (struct main_type
));
312 /* Restore owner information. */
313 TYPE_OBJFILE_OWNED (type
) = objfile_owned
;
314 TYPE_OWNER (type
) = owner
;
316 /* For now, delete the rings. */
317 TYPE_CHAIN (type
) = type
;
319 /* For now, leave the pointer/reference types alone. */
322 /* Lookup a pointer to a type TYPE. TYPEPTR, if nonzero, points
323 to a pointer to memory where the pointer type should be stored.
324 If *TYPEPTR is zero, update it to point to the pointer type we return.
325 We allocate new memory if needed. */
328 make_pointer_type (struct type
*type
, struct type
**typeptr
)
330 struct type
*ntype
; /* New type */
333 ntype
= TYPE_POINTER_TYPE (type
);
338 return ntype
; /* Don't care about alloc,
339 and have new type. */
340 else if (*typeptr
== 0)
342 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
347 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
349 ntype
= alloc_type_copy (type
);
353 else /* We have storage, but need to reset it. */
356 chain
= TYPE_CHAIN (ntype
);
358 TYPE_CHAIN (ntype
) = chain
;
361 TYPE_TARGET_TYPE (ntype
) = type
;
362 TYPE_POINTER_TYPE (type
) = ntype
;
364 /* FIXME! Assumes the machine has only one representation for pointers! */
367 = gdbarch_ptr_bit (get_type_arch (type
)) / TARGET_CHAR_BIT
;
368 TYPE_CODE (ntype
) = TYPE_CODE_PTR
;
370 /* Mark pointers as unsigned. The target converts between pointers
371 and addresses (CORE_ADDRs) using gdbarch_pointer_to_address and
372 gdbarch_address_to_pointer. */
373 TYPE_UNSIGNED (ntype
) = 1;
375 /* Update the length of all the other variants of this type. */
376 chain
= TYPE_CHAIN (ntype
);
377 while (chain
!= ntype
)
379 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
380 chain
= TYPE_CHAIN (chain
);
386 /* Given a type TYPE, return a type of pointers to that type.
387 May need to construct such a type if this is the first use. */
390 lookup_pointer_type (struct type
*type
)
392 return make_pointer_type (type
, (struct type
**) 0);
395 /* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero,
396 points to a pointer to memory where the reference type should be
397 stored. If *TYPEPTR is zero, update it to point to the reference
398 type we return. We allocate new memory if needed. REFCODE denotes
399 the kind of reference type to lookup (lvalue or rvalue reference). */
402 make_reference_type (struct type
*type
, struct type
**typeptr
,
403 enum type_code refcode
)
405 struct type
*ntype
; /* New type */
406 struct type
**reftype
;
409 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
411 ntype
= (refcode
== TYPE_CODE_REF
? TYPE_REFERENCE_TYPE (type
)
412 : TYPE_RVALUE_REFERENCE_TYPE (type
));
417 return ntype
; /* Don't care about alloc,
418 and have new type. */
419 else if (*typeptr
== 0)
421 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
426 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
428 ntype
= alloc_type_copy (type
);
432 else /* We have storage, but need to reset it. */
435 chain
= TYPE_CHAIN (ntype
);
437 TYPE_CHAIN (ntype
) = chain
;
440 TYPE_TARGET_TYPE (ntype
) = type
;
441 reftype
= (refcode
== TYPE_CODE_REF
? &TYPE_REFERENCE_TYPE (type
)
442 : &TYPE_RVALUE_REFERENCE_TYPE (type
));
446 /* FIXME! Assume the machine has only one representation for
447 references, and that it matches the (only) representation for
450 TYPE_LENGTH (ntype
) =
451 gdbarch_ptr_bit (get_type_arch (type
)) / TARGET_CHAR_BIT
;
452 TYPE_CODE (ntype
) = refcode
;
456 /* Update the length of all the other variants of this type. */
457 chain
= TYPE_CHAIN (ntype
);
458 while (chain
!= ntype
)
460 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
461 chain
= TYPE_CHAIN (chain
);
467 /* Same as above, but caller doesn't care about memory allocation
471 lookup_reference_type (struct type
*type
, enum type_code refcode
)
473 return make_reference_type (type
, (struct type
**) 0, refcode
);
476 /* Lookup the lvalue reference type for the type TYPE. */
479 lookup_lvalue_reference_type (struct type
*type
)
481 return lookup_reference_type (type
, TYPE_CODE_REF
);
484 /* Lookup the rvalue reference type for the type TYPE. */
487 lookup_rvalue_reference_type (struct type
*type
)
489 return lookup_reference_type (type
, TYPE_CODE_RVALUE_REF
);
492 /* Lookup a function type that returns type TYPE. TYPEPTR, if
493 nonzero, points to a pointer to memory where the function type
494 should be stored. If *TYPEPTR is zero, update it to point to the
495 function type we return. We allocate new memory if needed. */
498 make_function_type (struct type
*type
, struct type
**typeptr
)
500 struct type
*ntype
; /* New type */
502 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
504 ntype
= alloc_type_copy (type
);
508 else /* We have storage, but need to reset it. */
514 TYPE_TARGET_TYPE (ntype
) = type
;
516 TYPE_LENGTH (ntype
) = 1;
517 TYPE_CODE (ntype
) = TYPE_CODE_FUNC
;
519 INIT_FUNC_SPECIFIC (ntype
);
524 /* Given a type TYPE, return a type of functions that return that type.
525 May need to construct such a type if this is the first use. */
528 lookup_function_type (struct type
*type
)
530 return make_function_type (type
, (struct type
**) 0);
533 /* Given a type TYPE and argument types, return the appropriate
534 function type. If the final type in PARAM_TYPES is NULL, make a
538 lookup_function_type_with_arguments (struct type
*type
,
540 struct type
**param_types
)
542 struct type
*fn
= make_function_type (type
, (struct type
**) 0);
547 if (param_types
[nparams
- 1] == NULL
)
550 TYPE_VARARGS (fn
) = 1;
552 else if (TYPE_CODE (check_typedef (param_types
[nparams
- 1]))
556 /* Caller should have ensured this. */
557 gdb_assert (nparams
== 0);
558 TYPE_PROTOTYPED (fn
) = 1;
561 TYPE_PROTOTYPED (fn
) = 1;
564 TYPE_NFIELDS (fn
) = nparams
;
566 = (struct field
*) TYPE_ZALLOC (fn
, nparams
* sizeof (struct field
));
567 for (i
= 0; i
< nparams
; ++i
)
568 TYPE_FIELD_TYPE (fn
, i
) = param_types
[i
];
573 /* Identify address space identifier by name --
574 return the integer flag defined in gdbtypes.h. */
577 address_space_name_to_int (struct gdbarch
*gdbarch
, char *space_identifier
)
581 /* Check for known address space delimiters. */
582 if (!strcmp (space_identifier
, "code"))
583 return TYPE_INSTANCE_FLAG_CODE_SPACE
;
584 else if (!strcmp (space_identifier
, "data"))
585 return TYPE_INSTANCE_FLAG_DATA_SPACE
;
586 else if (gdbarch_address_class_name_to_type_flags_p (gdbarch
)
587 && gdbarch_address_class_name_to_type_flags (gdbarch
,
592 error (_("Unknown address space specifier: \"%s\""), space_identifier
);
595 /* Identify address space identifier by integer flag as defined in
596 gdbtypes.h -- return the string version of the adress space name. */
599 address_space_int_to_name (struct gdbarch
*gdbarch
, int space_flag
)
601 if (space_flag
& TYPE_INSTANCE_FLAG_CODE_SPACE
)
603 else if (space_flag
& TYPE_INSTANCE_FLAG_DATA_SPACE
)
605 else if ((space_flag
& TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
606 && gdbarch_address_class_type_flags_to_name_p (gdbarch
))
607 return gdbarch_address_class_type_flags_to_name (gdbarch
, space_flag
);
612 /* Create a new type with instance flags NEW_FLAGS, based on TYPE.
614 If STORAGE is non-NULL, create the new type instance there.
615 STORAGE must be in the same obstack as TYPE. */
618 make_qualified_type (struct type
*type
, int new_flags
,
619 struct type
*storage
)
626 if (TYPE_INSTANCE_FLAGS (ntype
) == new_flags
)
628 ntype
= TYPE_CHAIN (ntype
);
630 while (ntype
!= type
);
632 /* Create a new type instance. */
634 ntype
= alloc_type_instance (type
);
637 /* If STORAGE was provided, it had better be in the same objfile
638 as TYPE. Otherwise, we can't link it into TYPE's cv chain:
639 if one objfile is freed and the other kept, we'd have
640 dangling pointers. */
641 gdb_assert (TYPE_OBJFILE (type
) == TYPE_OBJFILE (storage
));
644 TYPE_MAIN_TYPE (ntype
) = TYPE_MAIN_TYPE (type
);
645 TYPE_CHAIN (ntype
) = ntype
;
648 /* Pointers or references to the original type are not relevant to
650 TYPE_POINTER_TYPE (ntype
) = (struct type
*) 0;
651 TYPE_REFERENCE_TYPE (ntype
) = (struct type
*) 0;
653 /* Chain the new qualified type to the old type. */
654 TYPE_CHAIN (ntype
) = TYPE_CHAIN (type
);
655 TYPE_CHAIN (type
) = ntype
;
657 /* Now set the instance flags and return the new type. */
658 TYPE_INSTANCE_FLAGS (ntype
) = new_flags
;
660 /* Set length of new type to that of the original type. */
661 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
666 /* Make an address-space-delimited variant of a type -- a type that
667 is identical to the one supplied except that it has an address
668 space attribute attached to it (such as "code" or "data").
670 The space attributes "code" and "data" are for Harvard
671 architectures. The address space attributes are for architectures
672 which have alternately sized pointers or pointers with alternate
676 make_type_with_address_space (struct type
*type
, int space_flag
)
678 int new_flags
= ((TYPE_INSTANCE_FLAGS (type
)
679 & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
680 | TYPE_INSTANCE_FLAG_DATA_SPACE
681 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
))
684 return make_qualified_type (type
, new_flags
, NULL
);
687 /* Make a "c-v" variant of a type -- a type that is identical to the
688 one supplied except that it may have const or volatile attributes
689 CNST is a flag for setting the const attribute
690 VOLTL is a flag for setting the volatile attribute
691 TYPE is the base type whose variant we are creating.
693 If TYPEPTR and *TYPEPTR are non-zero, then *TYPEPTR points to
694 storage to hold the new qualified type; *TYPEPTR and TYPE must be
695 in the same objfile. Otherwise, allocate fresh memory for the new
696 type whereever TYPE lives. If TYPEPTR is non-zero, set it to the
697 new type we construct. */
700 make_cv_type (int cnst
, int voltl
,
702 struct type
**typeptr
)
704 struct type
*ntype
; /* New type */
706 int new_flags
= (TYPE_INSTANCE_FLAGS (type
)
707 & ~(TYPE_INSTANCE_FLAG_CONST
708 | TYPE_INSTANCE_FLAG_VOLATILE
));
711 new_flags
|= TYPE_INSTANCE_FLAG_CONST
;
714 new_flags
|= TYPE_INSTANCE_FLAG_VOLATILE
;
716 if (typeptr
&& *typeptr
!= NULL
)
718 /* TYPE and *TYPEPTR must be in the same objfile. We can't have
719 a C-V variant chain that threads across objfiles: if one
720 objfile gets freed, then the other has a broken C-V chain.
722 This code used to try to copy over the main type from TYPE to
723 *TYPEPTR if they were in different objfiles, but that's
724 wrong, too: TYPE may have a field list or member function
725 lists, which refer to types of their own, etc. etc. The
726 whole shebang would need to be copied over recursively; you
727 can't have inter-objfile pointers. The only thing to do is
728 to leave stub types as stub types, and look them up afresh by
729 name each time you encounter them. */
730 gdb_assert (TYPE_OBJFILE (*typeptr
) == TYPE_OBJFILE (type
));
733 ntype
= make_qualified_type (type
, new_flags
,
734 typeptr
? *typeptr
: NULL
);
742 /* Make a 'restrict'-qualified version of TYPE. */
745 make_restrict_type (struct type
*type
)
747 return make_qualified_type (type
,
748 (TYPE_INSTANCE_FLAGS (type
)
749 | TYPE_INSTANCE_FLAG_RESTRICT
),
753 /* Make a type without const, volatile, or restrict. */
756 make_unqualified_type (struct type
*type
)
758 return make_qualified_type (type
,
759 (TYPE_INSTANCE_FLAGS (type
)
760 & ~(TYPE_INSTANCE_FLAG_CONST
761 | TYPE_INSTANCE_FLAG_VOLATILE
762 | TYPE_INSTANCE_FLAG_RESTRICT
)),
766 /* Make a '_Atomic'-qualified version of TYPE. */
769 make_atomic_type (struct type
*type
)
771 return make_qualified_type (type
,
772 (TYPE_INSTANCE_FLAGS (type
)
773 | TYPE_INSTANCE_FLAG_ATOMIC
),
777 /* Replace the contents of ntype with the type *type. This changes the
778 contents, rather than the pointer for TYPE_MAIN_TYPE (ntype); thus
779 the changes are propogated to all types in the TYPE_CHAIN.
781 In order to build recursive types, it's inevitable that we'll need
782 to update types in place --- but this sort of indiscriminate
783 smashing is ugly, and needs to be replaced with something more
784 controlled. TYPE_MAIN_TYPE is a step in this direction; it's not
785 clear if more steps are needed. */
788 replace_type (struct type
*ntype
, struct type
*type
)
792 /* These two types had better be in the same objfile. Otherwise,
793 the assignment of one type's main type structure to the other
794 will produce a type with references to objects (names; field
795 lists; etc.) allocated on an objfile other than its own. */
796 gdb_assert (TYPE_OBJFILE (ntype
) == TYPE_OBJFILE (type
));
798 *TYPE_MAIN_TYPE (ntype
) = *TYPE_MAIN_TYPE (type
);
800 /* The type length is not a part of the main type. Update it for
801 each type on the variant chain. */
805 /* Assert that this element of the chain has no address-class bits
806 set in its flags. Such type variants might have type lengths
807 which are supposed to be different from the non-address-class
808 variants. This assertion shouldn't ever be triggered because
809 symbol readers which do construct address-class variants don't
810 call replace_type(). */
811 gdb_assert (TYPE_ADDRESS_CLASS_ALL (chain
) == 0);
813 TYPE_LENGTH (chain
) = TYPE_LENGTH (type
);
814 chain
= TYPE_CHAIN (chain
);
816 while (ntype
!= chain
);
818 /* Assert that the two types have equivalent instance qualifiers.
819 This should be true for at least all of our debug readers. */
820 gdb_assert (TYPE_INSTANCE_FLAGS (ntype
) == TYPE_INSTANCE_FLAGS (type
));
823 /* Implement direct support for MEMBER_TYPE in GNU C++.
824 May need to construct such a type if this is the first use.
825 The TYPE is the type of the member. The DOMAIN is the type
826 of the aggregate that the member belongs to. */
829 lookup_memberptr_type (struct type
*type
, struct type
*domain
)
833 mtype
= alloc_type_copy (type
);
834 smash_to_memberptr_type (mtype
, domain
, type
);
838 /* Return a pointer-to-method type, for a method of type TO_TYPE. */
841 lookup_methodptr_type (struct type
*to_type
)
845 mtype
= alloc_type_copy (to_type
);
846 smash_to_methodptr_type (mtype
, to_type
);
850 /* Allocate a stub method whose return type is TYPE. This apparently
851 happens for speed of symbol reading, since parsing out the
852 arguments to the method is cpu-intensive, the way we are doing it.
853 So, we will fill in arguments later. This always returns a fresh
857 allocate_stub_method (struct type
*type
)
861 mtype
= alloc_type_copy (type
);
862 TYPE_CODE (mtype
) = TYPE_CODE_METHOD
;
863 TYPE_LENGTH (mtype
) = 1;
864 TYPE_STUB (mtype
) = 1;
865 TYPE_TARGET_TYPE (mtype
) = type
;
866 /* TYPE_SELF_TYPE (mtype) = unknown yet */
870 /* See gdbtypes.h. */
873 operator== (const dynamic_prop
&l
, const dynamic_prop
&r
)
875 if (l
.kind
!= r
.kind
)
883 return l
.data
.const_val
== r
.data
.const_val
;
884 case PROP_ADDR_OFFSET
:
887 return l
.data
.baton
== r
.data
.baton
;
890 gdb_assert_not_reached ("unhandled dynamic_prop kind");
893 /* See gdbtypes.h. */
896 operator== (const range_bounds
&l
, const range_bounds
&r
)
898 #define FIELD_EQ(FIELD) (l.FIELD == r.FIELD)
900 return (FIELD_EQ (low
)
902 && FIELD_EQ (flag_upper_bound_is_count
)
903 && FIELD_EQ (flag_bound_evaluated
));
908 /* Create a range type with a dynamic range from LOW_BOUND to
909 HIGH_BOUND, inclusive. See create_range_type for further details. */
912 create_range_type (struct type
*result_type
, struct type
*index_type
,
913 const struct dynamic_prop
*low_bound
,
914 const struct dynamic_prop
*high_bound
)
916 if (result_type
== NULL
)
917 result_type
= alloc_type_copy (index_type
);
918 TYPE_CODE (result_type
) = TYPE_CODE_RANGE
;
919 TYPE_TARGET_TYPE (result_type
) = index_type
;
920 if (TYPE_STUB (index_type
))
921 TYPE_TARGET_STUB (result_type
) = 1;
923 TYPE_LENGTH (result_type
) = TYPE_LENGTH (check_typedef (index_type
));
925 TYPE_RANGE_DATA (result_type
) = (struct range_bounds
*)
926 TYPE_ZALLOC (result_type
, sizeof (struct range_bounds
));
927 TYPE_RANGE_DATA (result_type
)->low
= *low_bound
;
928 TYPE_RANGE_DATA (result_type
)->high
= *high_bound
;
930 if (low_bound
->kind
== PROP_CONST
&& low_bound
->data
.const_val
>= 0)
931 TYPE_UNSIGNED (result_type
) = 1;
933 /* Ada allows the declaration of range types whose upper bound is
934 less than the lower bound, so checking the lower bound is not
935 enough. Make sure we do not mark a range type whose upper bound
936 is negative as unsigned. */
937 if (high_bound
->kind
== PROP_CONST
&& high_bound
->data
.const_val
< 0)
938 TYPE_UNSIGNED (result_type
) = 0;
943 /* Create a range type using either a blank type supplied in
944 RESULT_TYPE, or creating a new type, inheriting the objfile from
947 Indices will be of type INDEX_TYPE, and will range from LOW_BOUND
948 to HIGH_BOUND, inclusive.
950 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
951 sure it is TYPE_CODE_UNDEF before we bash it into a range type? */
954 create_static_range_type (struct type
*result_type
, struct type
*index_type
,
955 LONGEST low_bound
, LONGEST high_bound
)
957 struct dynamic_prop low
, high
;
959 low
.kind
= PROP_CONST
;
960 low
.data
.const_val
= low_bound
;
962 high
.kind
= PROP_CONST
;
963 high
.data
.const_val
= high_bound
;
965 result_type
= create_range_type (result_type
, index_type
, &low
, &high
);
970 /* Predicate tests whether BOUNDS are static. Returns 1 if all bounds values
971 are static, otherwise returns 0. */
974 has_static_range (const struct range_bounds
*bounds
)
976 return (bounds
->low
.kind
== PROP_CONST
977 && bounds
->high
.kind
== PROP_CONST
);
981 /* Set *LOWP and *HIGHP to the lower and upper bounds of discrete type
982 TYPE. Return 1 if type is a range type, 0 if it is discrete (and
983 bounds will fit in LONGEST), or -1 otherwise. */
986 get_discrete_bounds (struct type
*type
, LONGEST
*lowp
, LONGEST
*highp
)
988 type
= check_typedef (type
);
989 switch (TYPE_CODE (type
))
991 case TYPE_CODE_RANGE
:
992 *lowp
= TYPE_LOW_BOUND (type
);
993 *highp
= TYPE_HIGH_BOUND (type
);
996 if (TYPE_NFIELDS (type
) > 0)
998 /* The enums may not be sorted by value, so search all
1002 *lowp
= *highp
= TYPE_FIELD_ENUMVAL (type
, 0);
1003 for (i
= 0; i
< TYPE_NFIELDS (type
); i
++)
1005 if (TYPE_FIELD_ENUMVAL (type
, i
) < *lowp
)
1006 *lowp
= TYPE_FIELD_ENUMVAL (type
, i
);
1007 if (TYPE_FIELD_ENUMVAL (type
, i
) > *highp
)
1008 *highp
= TYPE_FIELD_ENUMVAL (type
, i
);
1011 /* Set unsigned indicator if warranted. */
1014 TYPE_UNSIGNED (type
) = 1;
1023 case TYPE_CODE_BOOL
:
1028 if (TYPE_LENGTH (type
) > sizeof (LONGEST
)) /* Too big */
1030 if (!TYPE_UNSIGNED (type
))
1032 *lowp
= -(1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1));
1033 *highp
= -*lowp
- 1;
1037 case TYPE_CODE_CHAR
:
1039 /* This round-about calculation is to avoid shifting by
1040 TYPE_LENGTH (type) * TARGET_CHAR_BIT, which will not work
1041 if TYPE_LENGTH (type) == sizeof (LONGEST). */
1042 *highp
= 1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1);
1043 *highp
= (*highp
- 1) | *highp
;
1050 /* Assuming TYPE is a simple, non-empty array type, compute its upper
1051 and lower bound. Save the low bound into LOW_BOUND if not NULL.
1052 Save the high bound into HIGH_BOUND if not NULL.
1054 Return 1 if the operation was successful. Return zero otherwise,
1055 in which case the values of LOW_BOUND and HIGH_BOUNDS are unmodified.
1057 We now simply use get_discrete_bounds call to get the values
1058 of the low and high bounds.
1059 get_discrete_bounds can return three values:
1060 1, meaning that index is a range,
1061 0, meaning that index is a discrete type,
1062 or -1 for failure. */
1065 get_array_bounds (struct type
*type
, LONGEST
*low_bound
, LONGEST
*high_bound
)
1067 struct type
*index
= TYPE_INDEX_TYPE (type
);
1075 res
= get_discrete_bounds (index
, &low
, &high
);
1079 /* Check if the array bounds are undefined. */
1081 && ((low_bound
&& TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type
))
1082 || (high_bound
&& TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type
))))
1094 /* Assuming that TYPE is a discrete type and VAL is a valid integer
1095 representation of a value of this type, save the corresponding
1096 position number in POS.
1098 Its differs from VAL only in the case of enumeration types. In
1099 this case, the position number of the value of the first listed
1100 enumeration literal is zero; the position number of the value of
1101 each subsequent enumeration literal is one more than that of its
1102 predecessor in the list.
1104 Return 1 if the operation was successful. Return zero otherwise,
1105 in which case the value of POS is unmodified.
1109 discrete_position (struct type
*type
, LONGEST val
, LONGEST
*pos
)
1111 if (TYPE_CODE (type
) == TYPE_CODE_ENUM
)
1115 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
1117 if (val
== TYPE_FIELD_ENUMVAL (type
, i
))
1123 /* Invalid enumeration value. */
1133 /* Create an array type using either a blank type supplied in
1134 RESULT_TYPE, or creating a new type, inheriting the objfile from
1137 Elements will be of type ELEMENT_TYPE, the indices will be of type
1140 BYTE_STRIDE_PROP, when not NULL, provides the array's byte stride.
1141 This byte stride property is added to the resulting array type
1142 as a DYN_PROP_BYTE_STRIDE. As a consequence, the BYTE_STRIDE_PROP
1143 argument can only be used to create types that are objfile-owned
1144 (see add_dyn_prop), meaning that either this function must be called
1145 with an objfile-owned RESULT_TYPE, or an objfile-owned RANGE_TYPE.
1147 BIT_STRIDE is taken into account only when BYTE_STRIDE_PROP is NULL.
1148 If BIT_STRIDE is not zero, build a packed array type whose element
1149 size is BIT_STRIDE. Otherwise, ignore this parameter.
1151 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1152 sure it is TYPE_CODE_UNDEF before we bash it into an array
1156 create_array_type_with_stride (struct type
*result_type
,
1157 struct type
*element_type
,
1158 struct type
*range_type
,
1159 struct dynamic_prop
*byte_stride_prop
,
1160 unsigned int bit_stride
)
1162 if (byte_stride_prop
!= NULL
1163 && byte_stride_prop
->kind
== PROP_CONST
)
1165 /* The byte stride is actually not dynamic. Pretend we were
1166 called with bit_stride set instead of byte_stride_prop.
1167 This will give us the same result type, while avoiding
1168 the need to handle this as a special case. */
1169 bit_stride
= byte_stride_prop
->data
.const_val
* 8;
1170 byte_stride_prop
= NULL
;
1173 if (result_type
== NULL
)
1174 result_type
= alloc_type_copy (range_type
);
1176 TYPE_CODE (result_type
) = TYPE_CODE_ARRAY
;
1177 TYPE_TARGET_TYPE (result_type
) = element_type
;
1178 if (byte_stride_prop
== NULL
1179 && has_static_range (TYPE_RANGE_DATA (range_type
))
1180 && (!type_not_associated (result_type
)
1181 && !type_not_allocated (result_type
)))
1183 LONGEST low_bound
, high_bound
;
1185 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
1186 low_bound
= high_bound
= 0;
1187 element_type
= check_typedef (element_type
);
1188 /* Be careful when setting the array length. Ada arrays can be
1189 empty arrays with the high_bound being smaller than the low_bound.
1190 In such cases, the array length should be zero. */
1191 if (high_bound
< low_bound
)
1192 TYPE_LENGTH (result_type
) = 0;
1193 else if (bit_stride
> 0)
1194 TYPE_LENGTH (result_type
) =
1195 (bit_stride
* (high_bound
- low_bound
+ 1) + 7) / 8;
1197 TYPE_LENGTH (result_type
) =
1198 TYPE_LENGTH (element_type
) * (high_bound
- low_bound
+ 1);
1202 /* This type is dynamic and its length needs to be computed
1203 on demand. In the meantime, avoid leaving the TYPE_LENGTH
1204 undefined by setting it to zero. Although we are not expected
1205 to trust TYPE_LENGTH in this case, setting the size to zero
1206 allows us to avoid allocating objects of random sizes in case
1207 we accidently do. */
1208 TYPE_LENGTH (result_type
) = 0;
1211 TYPE_NFIELDS (result_type
) = 1;
1212 TYPE_FIELDS (result_type
) =
1213 (struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
));
1214 TYPE_INDEX_TYPE (result_type
) = range_type
;
1215 if (byte_stride_prop
!= NULL
)
1216 add_dyn_prop (DYN_PROP_BYTE_STRIDE
, *byte_stride_prop
, result_type
);
1217 else if (bit_stride
> 0)
1218 TYPE_FIELD_BITSIZE (result_type
, 0) = bit_stride
;
1220 /* TYPE_TARGET_STUB will take care of zero length arrays. */
1221 if (TYPE_LENGTH (result_type
) == 0)
1222 TYPE_TARGET_STUB (result_type
) = 1;
1227 /* Same as create_array_type_with_stride but with no bit_stride
1228 (BIT_STRIDE = 0), thus building an unpacked array. */
1231 create_array_type (struct type
*result_type
,
1232 struct type
*element_type
,
1233 struct type
*range_type
)
1235 return create_array_type_with_stride (result_type
, element_type
,
1236 range_type
, NULL
, 0);
1240 lookup_array_range_type (struct type
*element_type
,
1241 LONGEST low_bound
, LONGEST high_bound
)
1243 struct type
*index_type
;
1244 struct type
*range_type
;
1246 if (TYPE_OBJFILE_OWNED (element_type
))
1247 index_type
= objfile_type (TYPE_OWNER (element_type
).objfile
)->builtin_int
;
1249 index_type
= builtin_type (get_type_arch (element_type
))->builtin_int
;
1250 range_type
= create_static_range_type (NULL
, index_type
,
1251 low_bound
, high_bound
);
1253 return create_array_type (NULL
, element_type
, range_type
);
1256 /* Create a string type using either a blank type supplied in
1257 RESULT_TYPE, or creating a new type. String types are similar
1258 enough to array of char types that we can use create_array_type to
1259 build the basic type and then bash it into a string type.
1261 For fixed length strings, the range type contains 0 as the lower
1262 bound and the length of the string minus one as the upper bound.
1264 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1265 sure it is TYPE_CODE_UNDEF before we bash it into a string
1269 create_string_type (struct type
*result_type
,
1270 struct type
*string_char_type
,
1271 struct type
*range_type
)
1273 result_type
= create_array_type (result_type
,
1276 TYPE_CODE (result_type
) = TYPE_CODE_STRING
;
1281 lookup_string_range_type (struct type
*string_char_type
,
1282 LONGEST low_bound
, LONGEST high_bound
)
1284 struct type
*result_type
;
1286 result_type
= lookup_array_range_type (string_char_type
,
1287 low_bound
, high_bound
);
1288 TYPE_CODE (result_type
) = TYPE_CODE_STRING
;
1293 create_set_type (struct type
*result_type
, struct type
*domain_type
)
1295 if (result_type
== NULL
)
1296 result_type
= alloc_type_copy (domain_type
);
1298 TYPE_CODE (result_type
) = TYPE_CODE_SET
;
1299 TYPE_NFIELDS (result_type
) = 1;
1300 TYPE_FIELDS (result_type
)
1301 = (struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
));
1303 if (!TYPE_STUB (domain_type
))
1305 LONGEST low_bound
, high_bound
, bit_length
;
1307 if (get_discrete_bounds (domain_type
, &low_bound
, &high_bound
) < 0)
1308 low_bound
= high_bound
= 0;
1309 bit_length
= high_bound
- low_bound
+ 1;
1310 TYPE_LENGTH (result_type
)
1311 = (bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1313 TYPE_UNSIGNED (result_type
) = 1;
1315 TYPE_FIELD_TYPE (result_type
, 0) = domain_type
;
1320 /* Convert ARRAY_TYPE to a vector type. This may modify ARRAY_TYPE
1321 and any array types nested inside it. */
1324 make_vector_type (struct type
*array_type
)
1326 struct type
*inner_array
, *elt_type
;
1329 /* Find the innermost array type, in case the array is
1330 multi-dimensional. */
1331 inner_array
= array_type
;
1332 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
1333 inner_array
= TYPE_TARGET_TYPE (inner_array
);
1335 elt_type
= TYPE_TARGET_TYPE (inner_array
);
1336 if (TYPE_CODE (elt_type
) == TYPE_CODE_INT
)
1338 flags
= TYPE_INSTANCE_FLAGS (elt_type
) | TYPE_INSTANCE_FLAG_NOTTEXT
;
1339 elt_type
= make_qualified_type (elt_type
, flags
, NULL
);
1340 TYPE_TARGET_TYPE (inner_array
) = elt_type
;
1343 TYPE_VECTOR (array_type
) = 1;
1347 init_vector_type (struct type
*elt_type
, int n
)
1349 struct type
*array_type
;
1351 array_type
= lookup_array_range_type (elt_type
, 0, n
- 1);
1352 make_vector_type (array_type
);
1356 /* Internal routine called by TYPE_SELF_TYPE to return the type that TYPE
1357 belongs to. In c++ this is the class of "this", but TYPE_THIS_TYPE is too
1358 confusing. "self" is a common enough replacement for "this".
1359 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1360 TYPE_CODE_METHOD. */
1363 internal_type_self_type (struct type
*type
)
1365 switch (TYPE_CODE (type
))
1367 case TYPE_CODE_METHODPTR
:
1368 case TYPE_CODE_MEMBERPTR
:
1369 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1371 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1372 return TYPE_MAIN_TYPE (type
)->type_specific
.self_type
;
1373 case TYPE_CODE_METHOD
:
1374 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1376 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1377 return TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
;
1379 gdb_assert_not_reached ("bad type");
1383 /* Set the type of the class that TYPE belongs to.
1384 In c++ this is the class of "this".
1385 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1386 TYPE_CODE_METHOD. */
1389 set_type_self_type (struct type
*type
, struct type
*self_type
)
1391 switch (TYPE_CODE (type
))
1393 case TYPE_CODE_METHODPTR
:
1394 case TYPE_CODE_MEMBERPTR
:
1395 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1396 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_SELF_TYPE
;
1397 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1398 TYPE_MAIN_TYPE (type
)->type_specific
.self_type
= self_type
;
1400 case TYPE_CODE_METHOD
:
1401 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1402 INIT_FUNC_SPECIFIC (type
);
1403 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1404 TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
= self_type
;
1407 gdb_assert_not_reached ("bad type");
1411 /* Smash TYPE to be a type of pointers to members of SELF_TYPE with type
1412 TO_TYPE. A member pointer is a wierd thing -- it amounts to a
1413 typed offset into a struct, e.g. "an int at offset 8". A MEMBER
1414 TYPE doesn't include the offset (that's the value of the MEMBER
1415 itself), but does include the structure type into which it points
1418 When "smashing" the type, we preserve the objfile that the old type
1419 pointed to, since we aren't changing where the type is actually
1423 smash_to_memberptr_type (struct type
*type
, struct type
*self_type
,
1424 struct type
*to_type
)
1427 TYPE_CODE (type
) = TYPE_CODE_MEMBERPTR
;
1428 TYPE_TARGET_TYPE (type
) = to_type
;
1429 set_type_self_type (type
, self_type
);
1430 /* Assume that a data member pointer is the same size as a normal
1433 = gdbarch_ptr_bit (get_type_arch (to_type
)) / TARGET_CHAR_BIT
;
1436 /* Smash TYPE to be a type of pointer to methods type TO_TYPE.
1438 When "smashing" the type, we preserve the objfile that the old type
1439 pointed to, since we aren't changing where the type is actually
1443 smash_to_methodptr_type (struct type
*type
, struct type
*to_type
)
1446 TYPE_CODE (type
) = TYPE_CODE_METHODPTR
;
1447 TYPE_TARGET_TYPE (type
) = to_type
;
1448 set_type_self_type (type
, TYPE_SELF_TYPE (to_type
));
1449 TYPE_LENGTH (type
) = cplus_method_ptr_size (to_type
);
1452 /* Smash TYPE to be a type of method of SELF_TYPE with type TO_TYPE.
1453 METHOD just means `function that gets an extra "this" argument'.
1455 When "smashing" the type, we preserve the objfile that the old type
1456 pointed to, since we aren't changing where the type is actually
1460 smash_to_method_type (struct type
*type
, struct type
*self_type
,
1461 struct type
*to_type
, struct field
*args
,
1462 int nargs
, int varargs
)
1465 TYPE_CODE (type
) = TYPE_CODE_METHOD
;
1466 TYPE_TARGET_TYPE (type
) = to_type
;
1467 set_type_self_type (type
, self_type
);
1468 TYPE_FIELDS (type
) = args
;
1469 TYPE_NFIELDS (type
) = nargs
;
1471 TYPE_VARARGS (type
) = 1;
1472 TYPE_LENGTH (type
) = 1; /* In practice, this is never needed. */
1475 /* A wrapper of TYPE_NAME which calls error if the type is anonymous.
1476 Since GCC PR debug/47510 DWARF provides associated information to detect the
1477 anonymous class linkage name from its typedef.
1479 Parameter TYPE should not yet have CHECK_TYPEDEF applied, this function will
1483 type_name_or_error (struct type
*type
)
1485 struct type
*saved_type
= type
;
1487 struct objfile
*objfile
;
1489 type
= check_typedef (type
);
1491 name
= TYPE_NAME (type
);
1495 name
= TYPE_NAME (saved_type
);
1496 objfile
= TYPE_OBJFILE (saved_type
);
1497 error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
1498 name
? name
: "<anonymous>",
1499 objfile
? objfile_name (objfile
) : "<arch>");
1502 /* Lookup a typedef or primitive type named NAME, visible in lexical
1503 block BLOCK. If NOERR is nonzero, return zero if NAME is not
1504 suitably defined. */
1507 lookup_typename (const struct language_defn
*language
,
1508 struct gdbarch
*gdbarch
, const char *name
,
1509 const struct block
*block
, int noerr
)
1513 sym
= lookup_symbol_in_language (name
, block
, VAR_DOMAIN
,
1514 language
->la_language
, NULL
).symbol
;
1515 if (sym
!= NULL
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
1516 return SYMBOL_TYPE (sym
);
1520 error (_("No type named %s."), name
);
1524 lookup_unsigned_typename (const struct language_defn
*language
,
1525 struct gdbarch
*gdbarch
, const char *name
)
1527 char *uns
= (char *) alloca (strlen (name
) + 10);
1529 strcpy (uns
, "unsigned ");
1530 strcpy (uns
+ 9, name
);
1531 return lookup_typename (language
, gdbarch
, uns
, NULL
, 0);
1535 lookup_signed_typename (const struct language_defn
*language
,
1536 struct gdbarch
*gdbarch
, const char *name
)
1539 char *uns
= (char *) alloca (strlen (name
) + 8);
1541 strcpy (uns
, "signed ");
1542 strcpy (uns
+ 7, name
);
1543 t
= lookup_typename (language
, gdbarch
, uns
, NULL
, 1);
1544 /* If we don't find "signed FOO" just try again with plain "FOO". */
1547 return lookup_typename (language
, gdbarch
, name
, NULL
, 0);
1550 /* Lookup a structure type named "struct NAME",
1551 visible in lexical block BLOCK. */
1554 lookup_struct (const char *name
, const struct block
*block
)
1558 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1562 error (_("No struct type named %s."), name
);
1564 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_STRUCT
)
1566 error (_("This context has class, union or enum %s, not a struct."),
1569 return (SYMBOL_TYPE (sym
));
1572 /* Lookup a union type named "union NAME",
1573 visible in lexical block BLOCK. */
1576 lookup_union (const char *name
, const struct block
*block
)
1581 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1584 error (_("No union type named %s."), name
);
1586 t
= SYMBOL_TYPE (sym
);
1588 if (TYPE_CODE (t
) == TYPE_CODE_UNION
)
1591 /* If we get here, it's not a union. */
1592 error (_("This context has class, struct or enum %s, not a union."),
1596 /* Lookup an enum type named "enum NAME",
1597 visible in lexical block BLOCK. */
1600 lookup_enum (const char *name
, const struct block
*block
)
1604 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1607 error (_("No enum type named %s."), name
);
1609 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_ENUM
)
1611 error (_("This context has class, struct or union %s, not an enum."),
1614 return (SYMBOL_TYPE (sym
));
1617 /* Lookup a template type named "template NAME<TYPE>",
1618 visible in lexical block BLOCK. */
1621 lookup_template_type (char *name
, struct type
*type
,
1622 const struct block
*block
)
1625 char *nam
= (char *)
1626 alloca (strlen (name
) + strlen (TYPE_NAME (type
)) + 4);
1630 strcat (nam
, TYPE_NAME (type
));
1631 strcat (nam
, " >"); /* FIXME, extra space still introduced in gcc? */
1633 sym
= lookup_symbol (nam
, block
, VAR_DOMAIN
, 0).symbol
;
1637 error (_("No template type named %s."), name
);
1639 if (TYPE_CODE (SYMBOL_TYPE (sym
)) != TYPE_CODE_STRUCT
)
1641 error (_("This context has class, union or enum %s, not a struct."),
1644 return (SYMBOL_TYPE (sym
));
1647 /* See gdbtypes.h. */
1650 lookup_struct_elt (struct type
*type
, const char *name
, int noerr
)
1656 type
= check_typedef (type
);
1657 if (TYPE_CODE (type
) != TYPE_CODE_PTR
1658 && TYPE_CODE (type
) != TYPE_CODE_REF
)
1660 type
= TYPE_TARGET_TYPE (type
);
1663 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
1664 && TYPE_CODE (type
) != TYPE_CODE_UNION
)
1666 std::string type_name
= type_to_string (type
);
1667 error (_("Type %s is not a structure or union type."),
1668 type_name
.c_str ());
1671 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1673 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1675 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1677 return {&TYPE_FIELD (type
, i
), TYPE_FIELD_BITPOS (type
, i
)};
1679 else if (!t_field_name
|| *t_field_name
== '\0')
1682 = lookup_struct_elt (TYPE_FIELD_TYPE (type
, i
), name
, 1);
1683 if (elt
.field
!= NULL
)
1685 elt
.offset
+= TYPE_FIELD_BITPOS (type
, i
);
1691 /* OK, it's not in this class. Recursively check the baseclasses. */
1692 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1694 struct_elt elt
= lookup_struct_elt (TYPE_BASECLASS (type
, i
), name
, 1);
1695 if (elt
.field
!= NULL
)
1700 return {nullptr, 0};
1702 std::string type_name
= type_to_string (type
);
1703 error (_("Type %s has no component named %s."), type_name
.c_str (), name
);
1706 /* See gdbtypes.h. */
1709 lookup_struct_elt_type (struct type
*type
, const char *name
, int noerr
)
1711 struct_elt elt
= lookup_struct_elt (type
, name
, noerr
);
1712 if (elt
.field
!= NULL
)
1713 return FIELD_TYPE (*elt
.field
);
1718 /* Store in *MAX the largest number representable by unsigned integer type
1722 get_unsigned_type_max (struct type
*type
, ULONGEST
*max
)
1726 type
= check_typedef (type
);
1727 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_INT
&& TYPE_UNSIGNED (type
));
1728 gdb_assert (TYPE_LENGTH (type
) <= sizeof (ULONGEST
));
1730 /* Written this way to avoid overflow. */
1731 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1732 *max
= ((((ULONGEST
) 1 << (n
- 1)) - 1) << 1) | 1;
1735 /* Store in *MIN, *MAX the smallest and largest numbers representable by
1736 signed integer type TYPE. */
1739 get_signed_type_minmax (struct type
*type
, LONGEST
*min
, LONGEST
*max
)
1743 type
= check_typedef (type
);
1744 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_INT
&& !TYPE_UNSIGNED (type
));
1745 gdb_assert (TYPE_LENGTH (type
) <= sizeof (LONGEST
));
1747 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1748 *min
= -((ULONGEST
) 1 << (n
- 1));
1749 *max
= ((ULONGEST
) 1 << (n
- 1)) - 1;
1752 /* Internal routine called by TYPE_VPTR_FIELDNO to return the value of
1753 cplus_stuff.vptr_fieldno.
1755 cplus_stuff is initialized to cplus_struct_default which does not
1756 set vptr_fieldno to -1 for portability reasons (IWBN to use C99
1757 designated initializers). We cope with that here. */
1760 internal_type_vptr_fieldno (struct type
*type
)
1762 type
= check_typedef (type
);
1763 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1764 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1765 if (!HAVE_CPLUS_STRUCT (type
))
1767 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
;
1770 /* Set the value of cplus_stuff.vptr_fieldno. */
1773 set_type_vptr_fieldno (struct type
*type
, int fieldno
)
1775 type
= check_typedef (type
);
1776 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1777 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1778 if (!HAVE_CPLUS_STRUCT (type
))
1779 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1780 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
= fieldno
;
1783 /* Internal routine called by TYPE_VPTR_BASETYPE to return the value of
1784 cplus_stuff.vptr_basetype. */
1787 internal_type_vptr_basetype (struct type
*type
)
1789 type
= check_typedef (type
);
1790 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1791 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1792 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_CPLUS_STUFF
);
1793 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
;
1796 /* Set the value of cplus_stuff.vptr_basetype. */
1799 set_type_vptr_basetype (struct type
*type
, struct type
*basetype
)
1801 type
= check_typedef (type
);
1802 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
1803 || TYPE_CODE (type
) == TYPE_CODE_UNION
);
1804 if (!HAVE_CPLUS_STRUCT (type
))
1805 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1806 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
= basetype
;
1809 /* Lookup the vptr basetype/fieldno values for TYPE.
1810 If found store vptr_basetype in *BASETYPEP if non-NULL, and return
1811 vptr_fieldno. Also, if found and basetype is from the same objfile,
1813 If not found, return -1 and ignore BASETYPEP.
1814 Callers should be aware that in some cases (for example,
1815 the type or one of its baseclasses is a stub type and we are
1816 debugging a .o file, or the compiler uses DWARF-2 and is not GCC),
1817 this function will not be able to find the
1818 virtual function table pointer, and vptr_fieldno will remain -1 and
1819 vptr_basetype will remain NULL or incomplete. */
1822 get_vptr_fieldno (struct type
*type
, struct type
**basetypep
)
1824 type
= check_typedef (type
);
1826 if (TYPE_VPTR_FIELDNO (type
) < 0)
1830 /* We must start at zero in case the first (and only) baseclass
1831 is virtual (and hence we cannot share the table pointer). */
1832 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
1834 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
1836 struct type
*basetype
;
1838 fieldno
= get_vptr_fieldno (baseclass
, &basetype
);
1841 /* If the type comes from a different objfile we can't cache
1842 it, it may have a different lifetime. PR 2384 */
1843 if (TYPE_OBJFILE (type
) == TYPE_OBJFILE (basetype
))
1845 set_type_vptr_fieldno (type
, fieldno
);
1846 set_type_vptr_basetype (type
, basetype
);
1849 *basetypep
= basetype
;
1860 *basetypep
= TYPE_VPTR_BASETYPE (type
);
1861 return TYPE_VPTR_FIELDNO (type
);
1866 stub_noname_complaint (void)
1868 complaint (_("stub type has NULL name"));
1871 /* Return nonzero if TYPE has a DYN_PROP_BYTE_STRIDE dynamic property
1872 attached to it, and that property has a non-constant value. */
1875 array_type_has_dynamic_stride (struct type
*type
)
1877 struct dynamic_prop
*prop
= get_dyn_prop (DYN_PROP_BYTE_STRIDE
, type
);
1879 return (prop
!= NULL
&& prop
->kind
!= PROP_CONST
);
1882 /* Worker for is_dynamic_type. */
1885 is_dynamic_type_internal (struct type
*type
, int top_level
)
1887 type
= check_typedef (type
);
1889 /* We only want to recognize references at the outermost level. */
1890 if (top_level
&& TYPE_CODE (type
) == TYPE_CODE_REF
)
1891 type
= check_typedef (TYPE_TARGET_TYPE (type
));
1893 /* Types that have a dynamic TYPE_DATA_LOCATION are considered
1894 dynamic, even if the type itself is statically defined.
1895 From a user's point of view, this may appear counter-intuitive;
1896 but it makes sense in this context, because the point is to determine
1897 whether any part of the type needs to be resolved before it can
1899 if (TYPE_DATA_LOCATION (type
) != NULL
1900 && (TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCEXPR
1901 || TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCLIST
))
1904 if (TYPE_ASSOCIATED_PROP (type
))
1907 if (TYPE_ALLOCATED_PROP (type
))
1910 switch (TYPE_CODE (type
))
1912 case TYPE_CODE_RANGE
:
1914 /* A range type is obviously dynamic if it has at least one
1915 dynamic bound. But also consider the range type to be
1916 dynamic when its subtype is dynamic, even if the bounds
1917 of the range type are static. It allows us to assume that
1918 the subtype of a static range type is also static. */
1919 return (!has_static_range (TYPE_RANGE_DATA (type
))
1920 || is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0));
1923 case TYPE_CODE_ARRAY
:
1925 gdb_assert (TYPE_NFIELDS (type
) == 1);
1927 /* The array is dynamic if either the bounds are dynamic... */
1928 if (is_dynamic_type_internal (TYPE_INDEX_TYPE (type
), 0))
1930 /* ... or the elements it contains have a dynamic contents... */
1931 if (is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0))
1933 /* ... or if it has a dynamic stride... */
1934 if (array_type_has_dynamic_stride (type
))
1939 case TYPE_CODE_STRUCT
:
1940 case TYPE_CODE_UNION
:
1944 for (i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
1945 if (!field_is_static (&TYPE_FIELD (type
, i
))
1946 && is_dynamic_type_internal (TYPE_FIELD_TYPE (type
, i
), 0))
1955 /* See gdbtypes.h. */
1958 is_dynamic_type (struct type
*type
)
1960 return is_dynamic_type_internal (type
, 1);
1963 static struct type
*resolve_dynamic_type_internal
1964 (struct type
*type
, struct property_addr_info
*addr_stack
, int top_level
);
1966 /* Given a dynamic range type (dyn_range_type) and a stack of
1967 struct property_addr_info elements, return a static version
1970 static struct type
*
1971 resolve_dynamic_range (struct type
*dyn_range_type
,
1972 struct property_addr_info
*addr_stack
)
1975 struct type
*static_range_type
, *static_target_type
;
1976 const struct dynamic_prop
*prop
;
1977 struct dynamic_prop low_bound
, high_bound
;
1979 gdb_assert (TYPE_CODE (dyn_range_type
) == TYPE_CODE_RANGE
);
1981 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->low
;
1982 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
1984 low_bound
.kind
= PROP_CONST
;
1985 low_bound
.data
.const_val
= value
;
1989 low_bound
.kind
= PROP_UNDEFINED
;
1990 low_bound
.data
.const_val
= 0;
1993 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->high
;
1994 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
1996 high_bound
.kind
= PROP_CONST
;
1997 high_bound
.data
.const_val
= value
;
1999 if (TYPE_RANGE_DATA (dyn_range_type
)->flag_upper_bound_is_count
)
2000 high_bound
.data
.const_val
2001 = low_bound
.data
.const_val
+ high_bound
.data
.const_val
- 1;
2005 high_bound
.kind
= PROP_UNDEFINED
;
2006 high_bound
.data
.const_val
= 0;
2010 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (dyn_range_type
),
2012 static_range_type
= create_range_type (copy_type (dyn_range_type
),
2014 &low_bound
, &high_bound
);
2015 TYPE_RANGE_DATA (static_range_type
)->flag_bound_evaluated
= 1;
2016 return static_range_type
;
2019 /* Resolves dynamic bound values of an array type TYPE to static ones.
2020 ADDR_STACK is a stack of struct property_addr_info to be used
2021 if needed during the dynamic resolution. */
2023 static struct type
*
2024 resolve_dynamic_array (struct type
*type
,
2025 struct property_addr_info
*addr_stack
)
2028 struct type
*elt_type
;
2029 struct type
*range_type
;
2030 struct type
*ary_dim
;
2031 struct dynamic_prop
*prop
;
2032 unsigned int bit_stride
= 0;
2034 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_ARRAY
);
2036 type
= copy_type (type
);
2039 range_type
= check_typedef (TYPE_INDEX_TYPE (elt_type
));
2040 range_type
= resolve_dynamic_range (range_type
, addr_stack
);
2042 /* Resolve allocated/associated here before creating a new array type, which
2043 will update the length of the array accordingly. */
2044 prop
= TYPE_ALLOCATED_PROP (type
);
2045 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2047 TYPE_DYN_PROP_ADDR (prop
) = value
;
2048 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2050 prop
= TYPE_ASSOCIATED_PROP (type
);
2051 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2053 TYPE_DYN_PROP_ADDR (prop
) = value
;
2054 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2057 ary_dim
= check_typedef (TYPE_TARGET_TYPE (elt_type
));
2059 if (ary_dim
!= NULL
&& TYPE_CODE (ary_dim
) == TYPE_CODE_ARRAY
)
2060 elt_type
= resolve_dynamic_array (ary_dim
, addr_stack
);
2062 elt_type
= TYPE_TARGET_TYPE (type
);
2064 prop
= get_dyn_prop (DYN_PROP_BYTE_STRIDE
, type
);
2068 = dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
);
2072 remove_dyn_prop (DYN_PROP_BYTE_STRIDE
, type
);
2073 bit_stride
= (unsigned int) (value
* 8);
2077 /* Could be a bug in our code, but it could also happen
2078 if the DWARF info is not correct. Issue a warning,
2079 and assume no byte/bit stride (leave bit_stride = 0). */
2080 warning (_("cannot determine array stride for type %s"),
2081 TYPE_NAME (type
) ? TYPE_NAME (type
) : "<no name>");
2085 bit_stride
= TYPE_FIELD_BITSIZE (type
, 0);
2087 return create_array_type_with_stride (type
, elt_type
, range_type
, NULL
,
2091 /* Resolve dynamic bounds of members of the union TYPE to static
2092 bounds. ADDR_STACK is a stack of struct property_addr_info
2093 to be used if needed during the dynamic resolution. */
2095 static struct type
*
2096 resolve_dynamic_union (struct type
*type
,
2097 struct property_addr_info
*addr_stack
)
2099 struct type
*resolved_type
;
2101 unsigned int max_len
= 0;
2103 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
2105 resolved_type
= copy_type (type
);
2106 TYPE_FIELDS (resolved_type
)
2107 = (struct field
*) TYPE_ALLOC (resolved_type
,
2108 TYPE_NFIELDS (resolved_type
)
2109 * sizeof (struct field
));
2110 memcpy (TYPE_FIELDS (resolved_type
),
2112 TYPE_NFIELDS (resolved_type
) * sizeof (struct field
));
2113 for (i
= 0; i
< TYPE_NFIELDS (resolved_type
); ++i
)
2117 if (field_is_static (&TYPE_FIELD (type
, i
)))
2120 t
= resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2122 TYPE_FIELD_TYPE (resolved_type
, i
) = t
;
2123 if (TYPE_LENGTH (t
) > max_len
)
2124 max_len
= TYPE_LENGTH (t
);
2127 TYPE_LENGTH (resolved_type
) = max_len
;
2128 return resolved_type
;
2131 /* Resolve dynamic bounds of members of the struct TYPE to static
2132 bounds. ADDR_STACK is a stack of struct property_addr_info to
2133 be used if needed during the dynamic resolution. */
2135 static struct type
*
2136 resolve_dynamic_struct (struct type
*type
,
2137 struct property_addr_info
*addr_stack
)
2139 struct type
*resolved_type
;
2141 unsigned resolved_type_bit_length
= 0;
2143 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_STRUCT
);
2144 gdb_assert (TYPE_NFIELDS (type
) > 0);
2146 resolved_type
= copy_type (type
);
2147 TYPE_FIELDS (resolved_type
)
2148 = (struct field
*) TYPE_ALLOC (resolved_type
,
2149 TYPE_NFIELDS (resolved_type
)
2150 * sizeof (struct field
));
2151 memcpy (TYPE_FIELDS (resolved_type
),
2153 TYPE_NFIELDS (resolved_type
) * sizeof (struct field
));
2154 for (i
= 0; i
< TYPE_NFIELDS (resolved_type
); ++i
)
2156 unsigned new_bit_length
;
2157 struct property_addr_info pinfo
;
2159 if (field_is_static (&TYPE_FIELD (type
, i
)))
2162 /* As we know this field is not a static field, the field's
2163 field_loc_kind should be FIELD_LOC_KIND_BITPOS. Verify
2164 this is the case, but only trigger a simple error rather
2165 than an internal error if that fails. While failing
2166 that verification indicates a bug in our code, the error
2167 is not severe enough to suggest to the user he stops
2168 his debugging session because of it. */
2169 if (TYPE_FIELD_LOC_KIND (type
, i
) != FIELD_LOC_KIND_BITPOS
)
2170 error (_("Cannot determine struct field location"
2171 " (invalid location kind)"));
2173 pinfo
.type
= check_typedef (TYPE_FIELD_TYPE (type
, i
));
2174 pinfo
.valaddr
= addr_stack
->valaddr
;
2177 + (TYPE_FIELD_BITPOS (resolved_type
, i
) / TARGET_CHAR_BIT
));
2178 pinfo
.next
= addr_stack
;
2180 TYPE_FIELD_TYPE (resolved_type
, i
)
2181 = resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2183 gdb_assert (TYPE_FIELD_LOC_KIND (resolved_type
, i
)
2184 == FIELD_LOC_KIND_BITPOS
);
2186 new_bit_length
= TYPE_FIELD_BITPOS (resolved_type
, i
);
2187 if (TYPE_FIELD_BITSIZE (resolved_type
, i
) != 0)
2188 new_bit_length
+= TYPE_FIELD_BITSIZE (resolved_type
, i
);
2190 new_bit_length
+= (TYPE_LENGTH (TYPE_FIELD_TYPE (resolved_type
, i
))
2193 /* Normally, we would use the position and size of the last field
2194 to determine the size of the enclosing structure. But GCC seems
2195 to be encoding the position of some fields incorrectly when
2196 the struct contains a dynamic field that is not placed last.
2197 So we compute the struct size based on the field that has
2198 the highest position + size - probably the best we can do. */
2199 if (new_bit_length
> resolved_type_bit_length
)
2200 resolved_type_bit_length
= new_bit_length
;
2203 /* The length of a type won't change for fortran, but it does for C and Ada.
2204 For fortran the size of dynamic fields might change over time but not the
2205 type length of the structure. If we adapt it, we run into problems
2206 when calculating the element offset for arrays of structs. */
2207 if (current_language
->la_language
!= language_fortran
)
2208 TYPE_LENGTH (resolved_type
)
2209 = (resolved_type_bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2211 /* The Ada language uses this field as a cache for static fixed types: reset
2212 it as RESOLVED_TYPE must have its own static fixed type. */
2213 TYPE_TARGET_TYPE (resolved_type
) = NULL
;
2215 return resolved_type
;
2218 /* Worker for resolved_dynamic_type. */
2220 static struct type
*
2221 resolve_dynamic_type_internal (struct type
*type
,
2222 struct property_addr_info
*addr_stack
,
2225 struct type
*real_type
= check_typedef (type
);
2226 struct type
*resolved_type
= type
;
2227 struct dynamic_prop
*prop
;
2230 if (!is_dynamic_type_internal (real_type
, top_level
))
2233 if (TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
2235 resolved_type
= copy_type (type
);
2236 TYPE_TARGET_TYPE (resolved_type
)
2237 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
), addr_stack
,
2242 /* Before trying to resolve TYPE, make sure it is not a stub. */
2245 switch (TYPE_CODE (type
))
2249 struct property_addr_info pinfo
;
2251 pinfo
.type
= check_typedef (TYPE_TARGET_TYPE (type
));
2252 pinfo
.valaddr
= NULL
;
2253 if (addr_stack
->valaddr
!= NULL
)
2254 pinfo
.addr
= extract_typed_address (addr_stack
->valaddr
, type
);
2256 pinfo
.addr
= read_memory_typed_address (addr_stack
->addr
, type
);
2257 pinfo
.next
= addr_stack
;
2259 resolved_type
= copy_type (type
);
2260 TYPE_TARGET_TYPE (resolved_type
)
2261 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
),
2266 case TYPE_CODE_ARRAY
:
2267 resolved_type
= resolve_dynamic_array (type
, addr_stack
);
2270 case TYPE_CODE_RANGE
:
2271 resolved_type
= resolve_dynamic_range (type
, addr_stack
);
2274 case TYPE_CODE_UNION
:
2275 resolved_type
= resolve_dynamic_union (type
, addr_stack
);
2278 case TYPE_CODE_STRUCT
:
2279 resolved_type
= resolve_dynamic_struct (type
, addr_stack
);
2284 /* Resolve data_location attribute. */
2285 prop
= TYPE_DATA_LOCATION (resolved_type
);
2287 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2289 TYPE_DYN_PROP_ADDR (prop
) = value
;
2290 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2293 return resolved_type
;
2296 /* See gdbtypes.h */
2299 resolve_dynamic_type (struct type
*type
, const gdb_byte
*valaddr
,
2302 struct property_addr_info pinfo
2303 = {check_typedef (type
), valaddr
, addr
, NULL
};
2305 return resolve_dynamic_type_internal (type
, &pinfo
, 1);
2308 /* See gdbtypes.h */
2310 struct dynamic_prop
*
2311 get_dyn_prop (enum dynamic_prop_node_kind prop_kind
, const struct type
*type
)
2313 struct dynamic_prop_list
*node
= TYPE_DYN_PROP_LIST (type
);
2315 while (node
!= NULL
)
2317 if (node
->prop_kind
== prop_kind
)
2324 /* See gdbtypes.h */
2327 add_dyn_prop (enum dynamic_prop_node_kind prop_kind
, struct dynamic_prop prop
,
2330 struct dynamic_prop_list
*temp
;
2332 gdb_assert (TYPE_OBJFILE_OWNED (type
));
2334 temp
= XOBNEW (&TYPE_OBJFILE (type
)->objfile_obstack
,
2335 struct dynamic_prop_list
);
2336 temp
->prop_kind
= prop_kind
;
2338 temp
->next
= TYPE_DYN_PROP_LIST (type
);
2340 TYPE_DYN_PROP_LIST (type
) = temp
;
2343 /* Remove dynamic property from TYPE in case it exists. */
2346 remove_dyn_prop (enum dynamic_prop_node_kind prop_kind
,
2349 struct dynamic_prop_list
*prev_node
, *curr_node
;
2351 curr_node
= TYPE_DYN_PROP_LIST (type
);
2354 while (NULL
!= curr_node
)
2356 if (curr_node
->prop_kind
== prop_kind
)
2358 /* Update the linked list but don't free anything.
2359 The property was allocated on objstack and it is not known
2360 if we are on top of it. Nevertheless, everything is released
2361 when the complete objstack is freed. */
2362 if (NULL
== prev_node
)
2363 TYPE_DYN_PROP_LIST (type
) = curr_node
->next
;
2365 prev_node
->next
= curr_node
->next
;
2370 prev_node
= curr_node
;
2371 curr_node
= curr_node
->next
;
2375 /* Find the real type of TYPE. This function returns the real type,
2376 after removing all layers of typedefs, and completing opaque or stub
2377 types. Completion changes the TYPE argument, but stripping of
2380 Instance flags (e.g. const/volatile) are preserved as typedefs are
2381 stripped. If necessary a new qualified form of the underlying type
2384 NOTE: This will return a typedef if TYPE_TARGET_TYPE for the typedef has
2385 not been computed and we're either in the middle of reading symbols, or
2386 there was no name for the typedef in the debug info.
2388 NOTE: Lookup of opaque types can throw errors for invalid symbol files.
2389 QUITs in the symbol reading code can also throw.
2390 Thus this function can throw an exception.
2392 If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
2395 If this is a stubbed struct (i.e. declared as struct foo *), see if
2396 we can find a full definition in some other file. If so, copy this
2397 definition, so we can use it in future. There used to be a comment
2398 (but not any code) that if we don't find a full definition, we'd
2399 set a flag so we don't spend time in the future checking the same
2400 type. That would be a mistake, though--we might load in more
2401 symbols which contain a full definition for the type. */
2404 check_typedef (struct type
*type
)
2406 struct type
*orig_type
= type
;
2407 /* While we're removing typedefs, we don't want to lose qualifiers.
2408 E.g., const/volatile. */
2409 int instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2413 while (TYPE_CODE (type
) == TYPE_CODE_TYPEDEF
)
2415 if (!TYPE_TARGET_TYPE (type
))
2420 /* It is dangerous to call lookup_symbol if we are currently
2421 reading a symtab. Infinite recursion is one danger. */
2422 if (currently_reading_symtab
)
2423 return make_qualified_type (type
, instance_flags
, NULL
);
2425 name
= TYPE_NAME (type
);
2426 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or
2427 VAR_DOMAIN as appropriate? */
2430 stub_noname_complaint ();
2431 return make_qualified_type (type
, instance_flags
, NULL
);
2433 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2435 TYPE_TARGET_TYPE (type
) = SYMBOL_TYPE (sym
);
2436 else /* TYPE_CODE_UNDEF */
2437 TYPE_TARGET_TYPE (type
) = alloc_type_arch (get_type_arch (type
));
2439 type
= TYPE_TARGET_TYPE (type
);
2441 /* Preserve the instance flags as we traverse down the typedef chain.
2443 Handling address spaces/classes is nasty, what do we do if there's a
2445 E.g., what if an outer typedef marks the type as class_1 and an inner
2446 typedef marks the type as class_2?
2447 This is the wrong place to do such error checking. We leave it to
2448 the code that created the typedef in the first place to flag the
2449 error. We just pick the outer address space (akin to letting the
2450 outer cast in a chain of casting win), instead of assuming
2451 "it can't happen". */
2453 const int ALL_SPACES
= (TYPE_INSTANCE_FLAG_CODE_SPACE
2454 | TYPE_INSTANCE_FLAG_DATA_SPACE
);
2455 const int ALL_CLASSES
= TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
;
2456 int new_instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2458 /* Treat code vs data spaces and address classes separately. */
2459 if ((instance_flags
& ALL_SPACES
) != 0)
2460 new_instance_flags
&= ~ALL_SPACES
;
2461 if ((instance_flags
& ALL_CLASSES
) != 0)
2462 new_instance_flags
&= ~ALL_CLASSES
;
2464 instance_flags
|= new_instance_flags
;
2468 /* If this is a struct/class/union with no fields, then check
2469 whether a full definition exists somewhere else. This is for
2470 systems where a type definition with no fields is issued for such
2471 types, instead of identifying them as stub types in the first
2474 if (TYPE_IS_OPAQUE (type
)
2475 && opaque_type_resolution
2476 && !currently_reading_symtab
)
2478 const char *name
= TYPE_NAME (type
);
2479 struct type
*newtype
;
2483 stub_noname_complaint ();
2484 return make_qualified_type (type
, instance_flags
, NULL
);
2486 newtype
= lookup_transparent_type (name
);
2490 /* If the resolved type and the stub are in the same
2491 objfile, then replace the stub type with the real deal.
2492 But if they're in separate objfiles, leave the stub
2493 alone; we'll just look up the transparent type every time
2494 we call check_typedef. We can't create pointers between
2495 types allocated to different objfiles, since they may
2496 have different lifetimes. Trying to copy NEWTYPE over to
2497 TYPE's objfile is pointless, too, since you'll have to
2498 move over any other types NEWTYPE refers to, which could
2499 be an unbounded amount of stuff. */
2500 if (TYPE_OBJFILE (newtype
) == TYPE_OBJFILE (type
))
2501 type
= make_qualified_type (newtype
,
2502 TYPE_INSTANCE_FLAGS (type
),
2508 /* Otherwise, rely on the stub flag being set for opaque/stubbed
2510 else if (TYPE_STUB (type
) && !currently_reading_symtab
)
2512 const char *name
= TYPE_NAME (type
);
2513 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or VAR_DOMAIN
2519 stub_noname_complaint ();
2520 return make_qualified_type (type
, instance_flags
, NULL
);
2522 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2525 /* Same as above for opaque types, we can replace the stub
2526 with the complete type only if they are in the same
2528 if (TYPE_OBJFILE (SYMBOL_TYPE(sym
)) == TYPE_OBJFILE (type
))
2529 type
= make_qualified_type (SYMBOL_TYPE (sym
),
2530 TYPE_INSTANCE_FLAGS (type
),
2533 type
= SYMBOL_TYPE (sym
);
2537 if (TYPE_TARGET_STUB (type
))
2539 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
2541 if (TYPE_STUB (target_type
) || TYPE_TARGET_STUB (target_type
))
2543 /* Nothing we can do. */
2545 else if (TYPE_CODE (type
) == TYPE_CODE_RANGE
)
2547 TYPE_LENGTH (type
) = TYPE_LENGTH (target_type
);
2548 TYPE_TARGET_STUB (type
) = 0;
2552 type
= make_qualified_type (type
, instance_flags
, NULL
);
2554 /* Cache TYPE_LENGTH for future use. */
2555 TYPE_LENGTH (orig_type
) = TYPE_LENGTH (type
);
2560 /* Parse a type expression in the string [P..P+LENGTH). If an error
2561 occurs, silently return a void type. */
2563 static struct type
*
2564 safe_parse_type (struct gdbarch
*gdbarch
, char *p
, int length
)
2566 struct ui_file
*saved_gdb_stderr
;
2567 struct type
*type
= NULL
; /* Initialize to keep gcc happy. */
2569 /* Suppress error messages. */
2570 saved_gdb_stderr
= gdb_stderr
;
2571 gdb_stderr
= &null_stream
;
2573 /* Call parse_and_eval_type() without fear of longjmp()s. */
2576 type
= parse_and_eval_type (p
, length
);
2578 catch (const gdb_exception_error
&except
)
2580 type
= builtin_type (gdbarch
)->builtin_void
;
2583 /* Stop suppressing error messages. */
2584 gdb_stderr
= saved_gdb_stderr
;
2589 /* Ugly hack to convert method stubs into method types.
2591 He ain't kiddin'. This demangles the name of the method into a
2592 string including argument types, parses out each argument type,
2593 generates a string casting a zero to that type, evaluates the
2594 string, and stuffs the resulting type into an argtype vector!!!
2595 Then it knows the type of the whole function (including argument
2596 types for overloading), which info used to be in the stab's but was
2597 removed to hack back the space required for them. */
2600 check_stub_method (struct type
*type
, int method_id
, int signature_id
)
2602 struct gdbarch
*gdbarch
= get_type_arch (type
);
2604 char *mangled_name
= gdb_mangle_name (type
, method_id
, signature_id
);
2605 char *demangled_name
= gdb_demangle (mangled_name
,
2606 DMGL_PARAMS
| DMGL_ANSI
);
2607 char *argtypetext
, *p
;
2608 int depth
= 0, argcount
= 1;
2609 struct field
*argtypes
;
2612 /* Make sure we got back a function string that we can use. */
2614 p
= strchr (demangled_name
, '(');
2618 if (demangled_name
== NULL
|| p
== NULL
)
2619 error (_("Internal: Cannot demangle mangled name `%s'."),
2622 /* Now, read in the parameters that define this type. */
2627 if (*p
== '(' || *p
== '<')
2631 else if (*p
== ')' || *p
== '>')
2635 else if (*p
== ',' && depth
== 0)
2643 /* If we read one argument and it was ``void'', don't count it. */
2644 if (startswith (argtypetext
, "(void)"))
2647 /* We need one extra slot, for the THIS pointer. */
2649 argtypes
= (struct field
*)
2650 TYPE_ALLOC (type
, (argcount
+ 1) * sizeof (struct field
));
2653 /* Add THIS pointer for non-static methods. */
2654 f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
2655 if (TYPE_FN_FIELD_STATIC_P (f
, signature_id
))
2659 argtypes
[0].type
= lookup_pointer_type (type
);
2663 if (*p
!= ')') /* () means no args, skip while. */
2668 if (depth
<= 0 && (*p
== ',' || *p
== ')'))
2670 /* Avoid parsing of ellipsis, they will be handled below.
2671 Also avoid ``void'' as above. */
2672 if (strncmp (argtypetext
, "...", p
- argtypetext
) != 0
2673 && strncmp (argtypetext
, "void", p
- argtypetext
) != 0)
2675 argtypes
[argcount
].type
=
2676 safe_parse_type (gdbarch
, argtypetext
, p
- argtypetext
);
2679 argtypetext
= p
+ 1;
2682 if (*p
== '(' || *p
== '<')
2686 else if (*p
== ')' || *p
== '>')
2695 TYPE_FN_FIELD_PHYSNAME (f
, signature_id
) = mangled_name
;
2697 /* Now update the old "stub" type into a real type. */
2698 mtype
= TYPE_FN_FIELD_TYPE (f
, signature_id
);
2699 /* MTYPE may currently be a function (TYPE_CODE_FUNC).
2700 We want a method (TYPE_CODE_METHOD). */
2701 smash_to_method_type (mtype
, type
, TYPE_TARGET_TYPE (mtype
),
2702 argtypes
, argcount
, p
[-2] == '.');
2703 TYPE_STUB (mtype
) = 0;
2704 TYPE_FN_FIELD_STUB (f
, signature_id
) = 0;
2706 xfree (demangled_name
);
2709 /* This is the external interface to check_stub_method, above. This
2710 function unstubs all of the signatures for TYPE's METHOD_ID method
2711 name. After calling this function TYPE_FN_FIELD_STUB will be
2712 cleared for each signature and TYPE_FN_FIELDLIST_NAME will be
2715 This function unfortunately can not die until stabs do. */
2718 check_stub_method_group (struct type
*type
, int method_id
)
2720 int len
= TYPE_FN_FIELDLIST_LENGTH (type
, method_id
);
2721 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
2723 for (int j
= 0; j
< len
; j
++)
2725 if (TYPE_FN_FIELD_STUB (f
, j
))
2726 check_stub_method (type
, method_id
, j
);
2730 /* Ensure it is in .rodata (if available) by workarounding GCC PR 44690. */
2731 const struct cplus_struct_type cplus_struct_default
= { };
2734 allocate_cplus_struct_type (struct type
*type
)
2736 if (HAVE_CPLUS_STRUCT (type
))
2737 /* Structure was already allocated. Nothing more to do. */
2740 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_CPLUS_STUFF
;
2741 TYPE_RAW_CPLUS_SPECIFIC (type
) = (struct cplus_struct_type
*)
2742 TYPE_ALLOC (type
, sizeof (struct cplus_struct_type
));
2743 *(TYPE_RAW_CPLUS_SPECIFIC (type
)) = cplus_struct_default
;
2744 set_type_vptr_fieldno (type
, -1);
2747 const struct gnat_aux_type gnat_aux_default
=
2750 /* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
2751 and allocate the associated gnat-specific data. The gnat-specific
2752 data is also initialized to gnat_aux_default. */
2755 allocate_gnat_aux_type (struct type
*type
)
2757 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_GNAT_STUFF
;
2758 TYPE_GNAT_SPECIFIC (type
) = (struct gnat_aux_type
*)
2759 TYPE_ALLOC (type
, sizeof (struct gnat_aux_type
));
2760 *(TYPE_GNAT_SPECIFIC (type
)) = gnat_aux_default
;
2763 /* Helper function to initialize a newly allocated type. Set type code
2764 to CODE and initialize the type-specific fields accordingly. */
2767 set_type_code (struct type
*type
, enum type_code code
)
2769 TYPE_CODE (type
) = code
;
2773 case TYPE_CODE_STRUCT
:
2774 case TYPE_CODE_UNION
:
2775 case TYPE_CODE_NAMESPACE
:
2776 INIT_CPLUS_SPECIFIC (type
);
2779 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_FLOATFORMAT
;
2781 case TYPE_CODE_FUNC
:
2782 INIT_FUNC_SPECIFIC (type
);
2787 /* Helper function to verify floating-point format and size.
2788 BIT is the type size in bits; if BIT equals -1, the size is
2789 determined by the floatformat. Returns size to be used. */
2792 verify_floatformat (int bit
, const struct floatformat
*floatformat
)
2794 gdb_assert (floatformat
!= NULL
);
2797 bit
= floatformat
->totalsize
;
2799 gdb_assert (bit
>= 0);
2800 gdb_assert (bit
>= floatformat
->totalsize
);
2805 /* Return the floating-point format for a floating-point variable of
2808 const struct floatformat
*
2809 floatformat_from_type (const struct type
*type
)
2811 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_FLT
);
2812 gdb_assert (TYPE_FLOATFORMAT (type
));
2813 return TYPE_FLOATFORMAT (type
);
2816 /* Helper function to initialize the standard scalar types.
2818 If NAME is non-NULL, then it is used to initialize the type name.
2819 Note that NAME is not copied; it is required to have a lifetime at
2820 least as long as OBJFILE. */
2823 init_type (struct objfile
*objfile
, enum type_code code
, int bit
,
2828 type
= alloc_type (objfile
);
2829 set_type_code (type
, code
);
2830 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
2831 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
2832 TYPE_NAME (type
) = name
;
2837 /* Allocate a TYPE_CODE_ERROR type structure associated with OBJFILE,
2838 to use with variables that have no debug info. NAME is the type
2841 static struct type
*
2842 init_nodebug_var_type (struct objfile
*objfile
, const char *name
)
2844 return init_type (objfile
, TYPE_CODE_ERROR
, 0, name
);
2847 /* Allocate a TYPE_CODE_INT type structure associated with OBJFILE.
2848 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
2849 the type's TYPE_UNSIGNED flag. NAME is the type name. */
2852 init_integer_type (struct objfile
*objfile
,
2853 int bit
, int unsigned_p
, const char *name
)
2857 t
= init_type (objfile
, TYPE_CODE_INT
, bit
, name
);
2859 TYPE_UNSIGNED (t
) = 1;
2864 /* Allocate a TYPE_CODE_CHAR type structure associated with OBJFILE.
2865 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
2866 the type's TYPE_UNSIGNED flag. NAME is the type name. */
2869 init_character_type (struct objfile
*objfile
,
2870 int bit
, int unsigned_p
, const char *name
)
2874 t
= init_type (objfile
, TYPE_CODE_CHAR
, bit
, name
);
2876 TYPE_UNSIGNED (t
) = 1;
2881 /* Allocate a TYPE_CODE_BOOL type structure associated with OBJFILE.
2882 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
2883 the type's TYPE_UNSIGNED flag. NAME is the type name. */
2886 init_boolean_type (struct objfile
*objfile
,
2887 int bit
, int unsigned_p
, const char *name
)
2891 t
= init_type (objfile
, TYPE_CODE_BOOL
, bit
, name
);
2893 TYPE_UNSIGNED (t
) = 1;
2898 /* Allocate a TYPE_CODE_FLT type structure associated with OBJFILE.
2899 BIT is the type size in bits; if BIT equals -1, the size is
2900 determined by the floatformat. NAME is the type name. Set the
2901 TYPE_FLOATFORMAT from FLOATFORMATS. */
2904 init_float_type (struct objfile
*objfile
,
2905 int bit
, const char *name
,
2906 const struct floatformat
**floatformats
)
2908 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2909 const struct floatformat
*fmt
= floatformats
[gdbarch_byte_order (gdbarch
)];
2912 bit
= verify_floatformat (bit
, fmt
);
2913 t
= init_type (objfile
, TYPE_CODE_FLT
, bit
, name
);
2914 TYPE_FLOATFORMAT (t
) = fmt
;
2919 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with OBJFILE.
2920 BIT is the type size in bits. NAME is the type name. */
2923 init_decfloat_type (struct objfile
*objfile
, int bit
, const char *name
)
2927 t
= init_type (objfile
, TYPE_CODE_DECFLOAT
, bit
, name
);
2931 /* Allocate a TYPE_CODE_COMPLEX type structure associated with OBJFILE.
2932 NAME is the type name. TARGET_TYPE is the component float type. */
2935 init_complex_type (struct objfile
*objfile
,
2936 const char *name
, struct type
*target_type
)
2940 t
= init_type (objfile
, TYPE_CODE_COMPLEX
,
2941 2 * TYPE_LENGTH (target_type
) * TARGET_CHAR_BIT
, name
);
2942 TYPE_TARGET_TYPE (t
) = target_type
;
2946 /* Allocate a TYPE_CODE_PTR type structure associated with OBJFILE.
2947 BIT is the pointer type size in bits. NAME is the type name.
2948 TARGET_TYPE is the pointer target type. Always sets the pointer type's
2949 TYPE_UNSIGNED flag. */
2952 init_pointer_type (struct objfile
*objfile
,
2953 int bit
, const char *name
, struct type
*target_type
)
2957 t
= init_type (objfile
, TYPE_CODE_PTR
, bit
, name
);
2958 TYPE_TARGET_TYPE (t
) = target_type
;
2959 TYPE_UNSIGNED (t
) = 1;
2963 /* See gdbtypes.h. */
2966 type_raw_align (struct type
*type
)
2968 if (type
->align_log2
!= 0)
2969 return 1 << (type
->align_log2
- 1);
2973 /* See gdbtypes.h. */
2976 type_align (struct type
*type
)
2978 /* Check alignment provided in the debug information. */
2979 unsigned raw_align
= type_raw_align (type
);
2983 /* Allow the architecture to provide an alignment. */
2984 struct gdbarch
*arch
= get_type_arch (type
);
2985 ULONGEST align
= gdbarch_type_align (arch
, type
);
2989 switch (TYPE_CODE (type
))
2992 case TYPE_CODE_FUNC
:
2993 case TYPE_CODE_FLAGS
:
2995 case TYPE_CODE_RANGE
:
2997 case TYPE_CODE_ENUM
:
2999 case TYPE_CODE_RVALUE_REF
:
3000 case TYPE_CODE_CHAR
:
3001 case TYPE_CODE_BOOL
:
3002 case TYPE_CODE_DECFLOAT
:
3003 case TYPE_CODE_METHODPTR
:
3004 case TYPE_CODE_MEMBERPTR
:
3005 align
= type_length_units (check_typedef (type
));
3008 case TYPE_CODE_ARRAY
:
3009 case TYPE_CODE_COMPLEX
:
3010 case TYPE_CODE_TYPEDEF
:
3011 align
= type_align (TYPE_TARGET_TYPE (type
));
3014 case TYPE_CODE_STRUCT
:
3015 case TYPE_CODE_UNION
:
3017 if (TYPE_NFIELDS (type
) == 0)
3019 /* An empty struct has alignment 1. */
3023 for (unsigned i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
3025 if (!field_is_static (&TYPE_FIELD (type
, i
)))
3027 ULONGEST f_align
= type_align (TYPE_FIELD_TYPE (type
, i
));
3030 /* Don't pretend we know something we don't. */
3034 if (f_align
> align
)
3042 case TYPE_CODE_STRING
:
3043 /* Not sure what to do here, and these can't appear in C or C++
3047 case TYPE_CODE_VOID
:
3051 case TYPE_CODE_ERROR
:
3052 case TYPE_CODE_METHOD
:
3057 if ((align
& (align
- 1)) != 0)
3059 /* Not a power of 2, so pass. */
3066 /* See gdbtypes.h. */
3069 set_type_align (struct type
*type
, ULONGEST align
)
3071 /* Must be a power of 2. Zero is ok. */
3072 gdb_assert ((align
& (align
- 1)) == 0);
3074 unsigned result
= 0;
3081 if (result
>= (1 << TYPE_ALIGN_BITS
))
3084 type
->align_log2
= result
;
3089 /* Queries on types. */
3092 can_dereference (struct type
*t
)
3094 /* FIXME: Should we return true for references as well as
3096 t
= check_typedef (t
);
3099 && TYPE_CODE (t
) == TYPE_CODE_PTR
3100 && TYPE_CODE (TYPE_TARGET_TYPE (t
)) != TYPE_CODE_VOID
);
3104 is_integral_type (struct type
*t
)
3106 t
= check_typedef (t
);
3109 && ((TYPE_CODE (t
) == TYPE_CODE_INT
)
3110 || (TYPE_CODE (t
) == TYPE_CODE_ENUM
)
3111 || (TYPE_CODE (t
) == TYPE_CODE_FLAGS
)
3112 || (TYPE_CODE (t
) == TYPE_CODE_CHAR
)
3113 || (TYPE_CODE (t
) == TYPE_CODE_RANGE
)
3114 || (TYPE_CODE (t
) == TYPE_CODE_BOOL
)));
3118 is_floating_type (struct type
*t
)
3120 t
= check_typedef (t
);
3123 && ((TYPE_CODE (t
) == TYPE_CODE_FLT
)
3124 || (TYPE_CODE (t
) == TYPE_CODE_DECFLOAT
)));
3127 /* Return true if TYPE is scalar. */
3130 is_scalar_type (struct type
*type
)
3132 type
= check_typedef (type
);
3134 switch (TYPE_CODE (type
))
3136 case TYPE_CODE_ARRAY
:
3137 case TYPE_CODE_STRUCT
:
3138 case TYPE_CODE_UNION
:
3140 case TYPE_CODE_STRING
:
3147 /* Return true if T is scalar, or a composite type which in practice has
3148 the memory layout of a scalar type. E.g., an array or struct with only
3149 one scalar element inside it, or a union with only scalar elements. */
3152 is_scalar_type_recursive (struct type
*t
)
3154 t
= check_typedef (t
);
3156 if (is_scalar_type (t
))
3158 /* Are we dealing with an array or string of known dimensions? */
3159 else if ((TYPE_CODE (t
) == TYPE_CODE_ARRAY
3160 || TYPE_CODE (t
) == TYPE_CODE_STRING
) && TYPE_NFIELDS (t
) == 1
3161 && TYPE_CODE (TYPE_INDEX_TYPE (t
)) == TYPE_CODE_RANGE
)
3163 LONGEST low_bound
, high_bound
;
3164 struct type
*elt_type
= check_typedef (TYPE_TARGET_TYPE (t
));
3166 get_discrete_bounds (TYPE_INDEX_TYPE (t
), &low_bound
, &high_bound
);
3168 return high_bound
== low_bound
&& is_scalar_type_recursive (elt_type
);
3170 /* Are we dealing with a struct with one element? */
3171 else if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
&& TYPE_NFIELDS (t
) == 1)
3172 return is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, 0));
3173 else if (TYPE_CODE (t
) == TYPE_CODE_UNION
)
3175 int i
, n
= TYPE_NFIELDS (t
);
3177 /* If all elements of the union are scalar, then the union is scalar. */
3178 for (i
= 0; i
< n
; i
++)
3179 if (!is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, i
)))
3188 /* Return true is T is a class or a union. False otherwise. */
3191 class_or_union_p (const struct type
*t
)
3193 return (TYPE_CODE (t
) == TYPE_CODE_STRUCT
3194 || TYPE_CODE (t
) == TYPE_CODE_UNION
);
3197 /* A helper function which returns true if types A and B represent the
3198 "same" class type. This is true if the types have the same main
3199 type, or the same name. */
3202 class_types_same_p (const struct type
*a
, const struct type
*b
)
3204 return (TYPE_MAIN_TYPE (a
) == TYPE_MAIN_TYPE (b
)
3205 || (TYPE_NAME (a
) && TYPE_NAME (b
)
3206 && !strcmp (TYPE_NAME (a
), TYPE_NAME (b
))));
3209 /* If BASE is an ancestor of DCLASS return the distance between them.
3210 otherwise return -1;
3214 class B: public A {};
3215 class C: public B {};
3218 distance_to_ancestor (A, A, 0) = 0
3219 distance_to_ancestor (A, B, 0) = 1
3220 distance_to_ancestor (A, C, 0) = 2
3221 distance_to_ancestor (A, D, 0) = 3
3223 If PUBLIC is 1 then only public ancestors are considered,
3224 and the function returns the distance only if BASE is a public ancestor
3228 distance_to_ancestor (A, D, 1) = -1. */
3231 distance_to_ancestor (struct type
*base
, struct type
*dclass
, int is_public
)
3236 base
= check_typedef (base
);
3237 dclass
= check_typedef (dclass
);
3239 if (class_types_same_p (base
, dclass
))
3242 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
); i
++)
3244 if (is_public
&& ! BASETYPE_VIA_PUBLIC (dclass
, i
))
3247 d
= distance_to_ancestor (base
, TYPE_BASECLASS (dclass
, i
), is_public
);
3255 /* Check whether BASE is an ancestor or base class or DCLASS
3256 Return 1 if so, and 0 if not.
3257 Note: If BASE and DCLASS are of the same type, this function
3258 will return 1. So for some class A, is_ancestor (A, A) will
3262 is_ancestor (struct type
*base
, struct type
*dclass
)
3264 return distance_to_ancestor (base
, dclass
, 0) >= 0;
3267 /* Like is_ancestor, but only returns true when BASE is a public
3268 ancestor of DCLASS. */
3271 is_public_ancestor (struct type
*base
, struct type
*dclass
)
3273 return distance_to_ancestor (base
, dclass
, 1) >= 0;
3276 /* A helper function for is_unique_ancestor. */
3279 is_unique_ancestor_worker (struct type
*base
, struct type
*dclass
,
3281 const gdb_byte
*valaddr
, int embedded_offset
,
3282 CORE_ADDR address
, struct value
*val
)
3286 base
= check_typedef (base
);
3287 dclass
= check_typedef (dclass
);
3289 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
) && count
< 2; ++i
)
3294 iter
= check_typedef (TYPE_BASECLASS (dclass
, i
));
3296 this_offset
= baseclass_offset (dclass
, i
, valaddr
, embedded_offset
,
3299 if (class_types_same_p (base
, iter
))
3301 /* If this is the first subclass, set *OFFSET and set count
3302 to 1. Otherwise, if this is at the same offset as
3303 previous instances, do nothing. Otherwise, increment
3307 *offset
= this_offset
;
3310 else if (this_offset
== *offset
)
3318 count
+= is_unique_ancestor_worker (base
, iter
, offset
,
3320 embedded_offset
+ this_offset
,
3327 /* Like is_ancestor, but only returns true if BASE is a unique base
3328 class of the type of VAL. */
3331 is_unique_ancestor (struct type
*base
, struct value
*val
)
3335 return is_unique_ancestor_worker (base
, value_type (val
), &offset
,
3336 value_contents_for_printing (val
),
3337 value_embedded_offset (val
),
3338 value_address (val
), val
) == 1;
3342 /* Overload resolution. */
3344 /* Return the sum of the rank of A with the rank of B. */
3347 sum_ranks (struct rank a
, struct rank b
)
3350 c
.rank
= a
.rank
+ b
.rank
;
3351 c
.subrank
= a
.subrank
+ b
.subrank
;
3355 /* Compare rank A and B and return:
3357 1 if a is better than b
3358 -1 if b is better than a. */
3361 compare_ranks (struct rank a
, struct rank b
)
3363 if (a
.rank
== b
.rank
)
3365 if (a
.subrank
== b
.subrank
)
3367 if (a
.subrank
< b
.subrank
)
3369 if (a
.subrank
> b
.subrank
)
3373 if (a
.rank
< b
.rank
)
3376 /* a.rank > b.rank */
3380 /* Functions for overload resolution begin here. */
3382 /* Compare two badness vectors A and B and return the result.
3383 0 => A and B are identical
3384 1 => A and B are incomparable
3385 2 => A is better than B
3386 3 => A is worse than B */
3389 compare_badness (const badness_vector
&a
, const badness_vector
&b
)
3393 short found_pos
= 0; /* any positives in c? */
3394 short found_neg
= 0; /* any negatives in c? */
3396 /* differing sizes => incomparable */
3397 if (a
.size () != b
.size ())
3400 /* Subtract b from a */
3401 for (i
= 0; i
< a
.size (); i
++)
3403 tmp
= compare_ranks (b
[i
], a
[i
]);
3413 return 1; /* incomparable */
3415 return 3; /* A > B */
3421 return 2; /* A < B */
3423 return 0; /* A == B */
3427 /* Rank a function by comparing its parameter types (PARMS), to the
3428 types of an argument list (ARGS). Return the badness vector. This
3429 has ARGS.size() + 1 entries. */
3432 rank_function (gdb::array_view
<type
*> parms
,
3433 gdb::array_view
<value
*> args
)
3435 /* add 1 for the length-match rank. */
3437 bv
.reserve (1 + args
.size ());
3439 /* First compare the lengths of the supplied lists.
3440 If there is a mismatch, set it to a high value. */
3442 /* pai/1997-06-03 FIXME: when we have debug info about default
3443 arguments and ellipsis parameter lists, we should consider those
3444 and rank the length-match more finely. */
3446 bv
.push_back ((args
.size () != parms
.size ())
3447 ? LENGTH_MISMATCH_BADNESS
3448 : EXACT_MATCH_BADNESS
);
3450 /* Now rank all the parameters of the candidate function. */
3451 size_t min_len
= std::min (parms
.size (), args
.size ());
3453 for (size_t i
= 0; i
< min_len
; i
++)
3454 bv
.push_back (rank_one_type (parms
[i
], value_type (args
[i
]),
3457 /* If more arguments than parameters, add dummy entries. */
3458 for (size_t i
= min_len
; i
< args
.size (); i
++)
3459 bv
.push_back (TOO_FEW_PARAMS_BADNESS
);
3464 /* Compare the names of two integer types, assuming that any sign
3465 qualifiers have been checked already. We do it this way because
3466 there may be an "int" in the name of one of the types. */
3469 integer_types_same_name_p (const char *first
, const char *second
)
3471 int first_p
, second_p
;
3473 /* If both are shorts, return 1; if neither is a short, keep
3475 first_p
= (strstr (first
, "short") != NULL
);
3476 second_p
= (strstr (second
, "short") != NULL
);
3477 if (first_p
&& second_p
)
3479 if (first_p
|| second_p
)
3482 /* Likewise for long. */
3483 first_p
= (strstr (first
, "long") != NULL
);
3484 second_p
= (strstr (second
, "long") != NULL
);
3485 if (first_p
&& second_p
)
3487 if (first_p
|| second_p
)
3490 /* Likewise for char. */
3491 first_p
= (strstr (first
, "char") != NULL
);
3492 second_p
= (strstr (second
, "char") != NULL
);
3493 if (first_p
&& second_p
)
3495 if (first_p
|| second_p
)
3498 /* They must both be ints. */
3502 /* Compares type A to type B. Returns true if they represent the same
3503 type, false otherwise. */
3506 types_equal (struct type
*a
, struct type
*b
)
3508 /* Identical type pointers. */
3509 /* However, this still doesn't catch all cases of same type for b
3510 and a. The reason is that builtin types are different from
3511 the same ones constructed from the object. */
3515 /* Resolve typedefs */
3516 if (TYPE_CODE (a
) == TYPE_CODE_TYPEDEF
)
3517 a
= check_typedef (a
);
3518 if (TYPE_CODE (b
) == TYPE_CODE_TYPEDEF
)
3519 b
= check_typedef (b
);
3521 /* If after resolving typedefs a and b are not of the same type
3522 code then they are not equal. */
3523 if (TYPE_CODE (a
) != TYPE_CODE (b
))
3526 /* If a and b are both pointers types or both reference types then
3527 they are equal of the same type iff the objects they refer to are
3528 of the same type. */
3529 if (TYPE_CODE (a
) == TYPE_CODE_PTR
3530 || TYPE_CODE (a
) == TYPE_CODE_REF
)
3531 return types_equal (TYPE_TARGET_TYPE (a
),
3532 TYPE_TARGET_TYPE (b
));
3534 /* Well, damnit, if the names are exactly the same, I'll say they
3535 are exactly the same. This happens when we generate method
3536 stubs. The types won't point to the same address, but they
3537 really are the same. */
3539 if (TYPE_NAME (a
) && TYPE_NAME (b
)
3540 && strcmp (TYPE_NAME (a
), TYPE_NAME (b
)) == 0)
3543 /* Check if identical after resolving typedefs. */
3547 /* Two function types are equal if their argument and return types
3549 if (TYPE_CODE (a
) == TYPE_CODE_FUNC
)
3553 if (TYPE_NFIELDS (a
) != TYPE_NFIELDS (b
))
3556 if (!types_equal (TYPE_TARGET_TYPE (a
), TYPE_TARGET_TYPE (b
)))
3559 for (i
= 0; i
< TYPE_NFIELDS (a
); ++i
)
3560 if (!types_equal (TYPE_FIELD_TYPE (a
, i
), TYPE_FIELD_TYPE (b
, i
)))
3569 /* Deep comparison of types. */
3571 /* An entry in the type-equality bcache. */
3573 struct type_equality_entry
3575 type_equality_entry (struct type
*t1
, struct type
*t2
)
3581 struct type
*type1
, *type2
;
3584 /* A helper function to compare two strings. Returns true if they are
3585 the same, false otherwise. Handles NULLs properly. */
3588 compare_maybe_null_strings (const char *s
, const char *t
)
3590 if (s
== NULL
|| t
== NULL
)
3592 return strcmp (s
, t
) == 0;
3595 /* A helper function for check_types_worklist that checks two types for
3596 "deep" equality. Returns true if the types are considered the
3597 same, false otherwise. */
3600 check_types_equal (struct type
*type1
, struct type
*type2
,
3601 std::vector
<type_equality_entry
> *worklist
)
3603 type1
= check_typedef (type1
);
3604 type2
= check_typedef (type2
);
3609 if (TYPE_CODE (type1
) != TYPE_CODE (type2
)
3610 || TYPE_LENGTH (type1
) != TYPE_LENGTH (type2
)
3611 || TYPE_UNSIGNED (type1
) != TYPE_UNSIGNED (type2
)
3612 || TYPE_NOSIGN (type1
) != TYPE_NOSIGN (type2
)
3613 || TYPE_VARARGS (type1
) != TYPE_VARARGS (type2
)
3614 || TYPE_VECTOR (type1
) != TYPE_VECTOR (type2
)
3615 || TYPE_NOTTEXT (type1
) != TYPE_NOTTEXT (type2
)
3616 || TYPE_INSTANCE_FLAGS (type1
) != TYPE_INSTANCE_FLAGS (type2
)
3617 || TYPE_NFIELDS (type1
) != TYPE_NFIELDS (type2
))
3620 if (!compare_maybe_null_strings (TYPE_NAME (type1
), TYPE_NAME (type2
)))
3622 if (!compare_maybe_null_strings (TYPE_NAME (type1
), TYPE_NAME (type2
)))
3625 if (TYPE_CODE (type1
) == TYPE_CODE_RANGE
)
3627 if (*TYPE_RANGE_DATA (type1
) != *TYPE_RANGE_DATA (type2
))
3634 for (i
= 0; i
< TYPE_NFIELDS (type1
); ++i
)
3636 const struct field
*field1
= &TYPE_FIELD (type1
, i
);
3637 const struct field
*field2
= &TYPE_FIELD (type2
, i
);
3639 if (FIELD_ARTIFICIAL (*field1
) != FIELD_ARTIFICIAL (*field2
)
3640 || FIELD_BITSIZE (*field1
) != FIELD_BITSIZE (*field2
)
3641 || FIELD_LOC_KIND (*field1
) != FIELD_LOC_KIND (*field2
))
3643 if (!compare_maybe_null_strings (FIELD_NAME (*field1
),
3644 FIELD_NAME (*field2
)))
3646 switch (FIELD_LOC_KIND (*field1
))
3648 case FIELD_LOC_KIND_BITPOS
:
3649 if (FIELD_BITPOS (*field1
) != FIELD_BITPOS (*field2
))
3652 case FIELD_LOC_KIND_ENUMVAL
:
3653 if (FIELD_ENUMVAL (*field1
) != FIELD_ENUMVAL (*field2
))
3656 case FIELD_LOC_KIND_PHYSADDR
:
3657 if (FIELD_STATIC_PHYSADDR (*field1
)
3658 != FIELD_STATIC_PHYSADDR (*field2
))
3661 case FIELD_LOC_KIND_PHYSNAME
:
3662 if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1
),
3663 FIELD_STATIC_PHYSNAME (*field2
)))
3666 case FIELD_LOC_KIND_DWARF_BLOCK
:
3668 struct dwarf2_locexpr_baton
*block1
, *block2
;
3670 block1
= FIELD_DWARF_BLOCK (*field1
);
3671 block2
= FIELD_DWARF_BLOCK (*field2
);
3672 if (block1
->per_cu
!= block2
->per_cu
3673 || block1
->size
!= block2
->size
3674 || memcmp (block1
->data
, block2
->data
, block1
->size
) != 0)
3679 internal_error (__FILE__
, __LINE__
, _("Unsupported field kind "
3680 "%d by check_types_equal"),
3681 FIELD_LOC_KIND (*field1
));
3684 worklist
->emplace_back (FIELD_TYPE (*field1
), FIELD_TYPE (*field2
));
3688 if (TYPE_TARGET_TYPE (type1
) != NULL
)
3690 if (TYPE_TARGET_TYPE (type2
) == NULL
)
3693 worklist
->emplace_back (TYPE_TARGET_TYPE (type1
),
3694 TYPE_TARGET_TYPE (type2
));
3696 else if (TYPE_TARGET_TYPE (type2
) != NULL
)
3702 /* Check types on a worklist for equality. Returns false if any pair
3703 is not equal, true if they are all considered equal. */
3706 check_types_worklist (std::vector
<type_equality_entry
> *worklist
,
3707 struct bcache
*cache
)
3709 while (!worklist
->empty ())
3713 struct type_equality_entry entry
= std::move (worklist
->back ());
3714 worklist
->pop_back ();
3716 /* If the type pair has already been visited, we know it is
3718 cache
->insert (&entry
, sizeof (entry
), &added
);
3722 if (!check_types_equal (entry
.type1
, entry
.type2
, worklist
))
3729 /* Return true if types TYPE1 and TYPE2 are equal, as determined by a
3730 "deep comparison". Otherwise return false. */
3733 types_deeply_equal (struct type
*type1
, struct type
*type2
)
3735 std::vector
<type_equality_entry
> worklist
;
3737 gdb_assert (type1
!= NULL
&& type2
!= NULL
);
3739 /* Early exit for the simple case. */
3743 struct bcache
cache (nullptr, nullptr);
3744 worklist
.emplace_back (type1
, type2
);
3745 return check_types_worklist (&worklist
, &cache
);
3748 /* Allocated status of type TYPE. Return zero if type TYPE is allocated.
3749 Otherwise return one. */
3752 type_not_allocated (const struct type
*type
)
3754 struct dynamic_prop
*prop
= TYPE_ALLOCATED_PROP (type
);
3756 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
3757 && !TYPE_DYN_PROP_ADDR (prop
));
3760 /* Associated status of type TYPE. Return zero if type TYPE is associated.
3761 Otherwise return one. */
3764 type_not_associated (const struct type
*type
)
3766 struct dynamic_prop
*prop
= TYPE_ASSOCIATED_PROP (type
);
3768 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
3769 && !TYPE_DYN_PROP_ADDR (prop
));
3772 /* rank_one_type helper for when PARM's type code is TYPE_CODE_PTR. */
3775 rank_one_type_parm_ptr (struct type
*parm
, struct type
*arg
, struct value
*value
)
3777 struct rank rank
= {0,0};
3779 switch (TYPE_CODE (arg
))
3783 /* Allowed pointer conversions are:
3784 (a) pointer to void-pointer conversion. */
3785 if (TYPE_CODE (TYPE_TARGET_TYPE (parm
)) == TYPE_CODE_VOID
)
3786 return VOID_PTR_CONVERSION_BADNESS
;
3788 /* (b) pointer to ancestor-pointer conversion. */
3789 rank
.subrank
= distance_to_ancestor (TYPE_TARGET_TYPE (parm
),
3790 TYPE_TARGET_TYPE (arg
),
3792 if (rank
.subrank
>= 0)
3793 return sum_ranks (BASE_PTR_CONVERSION_BADNESS
, rank
);
3795 return INCOMPATIBLE_TYPE_BADNESS
;
3796 case TYPE_CODE_ARRAY
:
3798 struct type
*t1
= TYPE_TARGET_TYPE (parm
);
3799 struct type
*t2
= TYPE_TARGET_TYPE (arg
);
3801 if (types_equal (t1
, t2
))
3803 /* Make sure they are CV equal. */
3804 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
3805 rank
.subrank
|= CV_CONVERSION_CONST
;
3806 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
3807 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
3808 if (rank
.subrank
!= 0)
3809 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
3810 return EXACT_MATCH_BADNESS
;
3812 return INCOMPATIBLE_TYPE_BADNESS
;
3814 case TYPE_CODE_FUNC
:
3815 return rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
);
3817 if (value
!= NULL
&& TYPE_CODE (value_type (value
)) == TYPE_CODE_INT
)
3819 if (value_as_long (value
) == 0)
3821 /* Null pointer conversion: allow it to be cast to a pointer.
3822 [4.10.1 of C++ standard draft n3290] */
3823 return NULL_POINTER_CONVERSION_BADNESS
;
3827 /* If type checking is disabled, allow the conversion. */
3828 if (!strict_type_checking
)
3829 return NS_INTEGER_POINTER_CONVERSION_BADNESS
;
3833 case TYPE_CODE_ENUM
:
3834 case TYPE_CODE_FLAGS
:
3835 case TYPE_CODE_CHAR
:
3836 case TYPE_CODE_RANGE
:
3837 case TYPE_CODE_BOOL
:
3839 return INCOMPATIBLE_TYPE_BADNESS
;
3843 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ARRAY. */
3846 rank_one_type_parm_array (struct type
*parm
, struct type
*arg
, struct value
*value
)
3848 switch (TYPE_CODE (arg
))
3851 case TYPE_CODE_ARRAY
:
3852 return rank_one_type (TYPE_TARGET_TYPE (parm
),
3853 TYPE_TARGET_TYPE (arg
), NULL
);
3855 return INCOMPATIBLE_TYPE_BADNESS
;
3859 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FUNC. */
3862 rank_one_type_parm_func (struct type
*parm
, struct type
*arg
, struct value
*value
)
3864 switch (TYPE_CODE (arg
))
3866 case TYPE_CODE_PTR
: /* funcptr -> func */
3867 return rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
);
3869 return INCOMPATIBLE_TYPE_BADNESS
;
3873 /* rank_one_type helper for when PARM's type code is TYPE_CODE_INT. */
3876 rank_one_type_parm_int (struct type
*parm
, struct type
*arg
, struct value
*value
)
3878 switch (TYPE_CODE (arg
))
3881 if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
3883 /* Deal with signed, unsigned, and plain chars and
3884 signed and unsigned ints. */
3885 if (TYPE_NOSIGN (parm
))
3887 /* This case only for character types. */
3888 if (TYPE_NOSIGN (arg
))
3889 return EXACT_MATCH_BADNESS
; /* plain char -> plain char */
3890 else /* signed/unsigned char -> plain char */
3891 return INTEGER_CONVERSION_BADNESS
;
3893 else if (TYPE_UNSIGNED (parm
))
3895 if (TYPE_UNSIGNED (arg
))
3897 /* unsigned int -> unsigned int, or
3898 unsigned long -> unsigned long */
3899 if (integer_types_same_name_p (TYPE_NAME (parm
),
3901 return EXACT_MATCH_BADNESS
;
3902 else if (integer_types_same_name_p (TYPE_NAME (arg
),
3904 && integer_types_same_name_p (TYPE_NAME (parm
),
3906 /* unsigned int -> unsigned long */
3907 return INTEGER_PROMOTION_BADNESS
;
3909 /* unsigned long -> unsigned int */
3910 return INTEGER_CONVERSION_BADNESS
;
3914 if (integer_types_same_name_p (TYPE_NAME (arg
),
3916 && integer_types_same_name_p (TYPE_NAME (parm
),
3918 /* signed long -> unsigned int */
3919 return INTEGER_CONVERSION_BADNESS
;
3921 /* signed int/long -> unsigned int/long */
3922 return INTEGER_CONVERSION_BADNESS
;
3925 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
3927 if (integer_types_same_name_p (TYPE_NAME (parm
),
3929 return EXACT_MATCH_BADNESS
;
3930 else if (integer_types_same_name_p (TYPE_NAME (arg
),
3932 && integer_types_same_name_p (TYPE_NAME (parm
),
3934 return INTEGER_PROMOTION_BADNESS
;
3936 return INTEGER_CONVERSION_BADNESS
;
3939 return INTEGER_CONVERSION_BADNESS
;
3941 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
3942 return INTEGER_PROMOTION_BADNESS
;
3944 return INTEGER_CONVERSION_BADNESS
;
3945 case TYPE_CODE_ENUM
:
3946 case TYPE_CODE_FLAGS
:
3947 case TYPE_CODE_CHAR
:
3948 case TYPE_CODE_RANGE
:
3949 case TYPE_CODE_BOOL
:
3950 if (TYPE_DECLARED_CLASS (arg
))
3951 return INCOMPATIBLE_TYPE_BADNESS
;
3952 return INTEGER_PROMOTION_BADNESS
;
3954 return INT_FLOAT_CONVERSION_BADNESS
;
3956 return NS_POINTER_CONVERSION_BADNESS
;
3958 return INCOMPATIBLE_TYPE_BADNESS
;
3962 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ENUM. */
3965 rank_one_type_parm_enum (struct type
*parm
, struct type
*arg
, struct value
*value
)
3967 switch (TYPE_CODE (arg
))
3970 case TYPE_CODE_CHAR
:
3971 case TYPE_CODE_RANGE
:
3972 case TYPE_CODE_BOOL
:
3973 case TYPE_CODE_ENUM
:
3974 if (TYPE_DECLARED_CLASS (parm
) || TYPE_DECLARED_CLASS (arg
))
3975 return INCOMPATIBLE_TYPE_BADNESS
;
3976 return INTEGER_CONVERSION_BADNESS
;
3978 return INT_FLOAT_CONVERSION_BADNESS
;
3980 return INCOMPATIBLE_TYPE_BADNESS
;
3984 /* rank_one_type helper for when PARM's type code is TYPE_CODE_CHAR. */
3987 rank_one_type_parm_char (struct type
*parm
, struct type
*arg
, struct value
*value
)
3989 switch (TYPE_CODE (arg
))
3991 case TYPE_CODE_RANGE
:
3992 case TYPE_CODE_BOOL
:
3993 case TYPE_CODE_ENUM
:
3994 if (TYPE_DECLARED_CLASS (arg
))
3995 return INCOMPATIBLE_TYPE_BADNESS
;
3996 return INTEGER_CONVERSION_BADNESS
;
3998 return INT_FLOAT_CONVERSION_BADNESS
;
4000 if (TYPE_LENGTH (arg
) > TYPE_LENGTH (parm
))
4001 return INTEGER_CONVERSION_BADNESS
;
4002 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4003 return INTEGER_PROMOTION_BADNESS
;
4005 case TYPE_CODE_CHAR
:
4006 /* Deal with signed, unsigned, and plain chars for C++ and
4007 with int cases falling through from previous case. */
4008 if (TYPE_NOSIGN (parm
))
4010 if (TYPE_NOSIGN (arg
))
4011 return EXACT_MATCH_BADNESS
;
4013 return INTEGER_CONVERSION_BADNESS
;
4015 else if (TYPE_UNSIGNED (parm
))
4017 if (TYPE_UNSIGNED (arg
))
4018 return EXACT_MATCH_BADNESS
;
4020 return INTEGER_PROMOTION_BADNESS
;
4022 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
4023 return EXACT_MATCH_BADNESS
;
4025 return INTEGER_CONVERSION_BADNESS
;
4027 return INCOMPATIBLE_TYPE_BADNESS
;
4031 /* rank_one_type helper for when PARM's type code is TYPE_CODE_RANGE. */
4034 rank_one_type_parm_range (struct type
*parm
, struct type
*arg
, struct value
*value
)
4036 switch (TYPE_CODE (arg
))
4039 case TYPE_CODE_CHAR
:
4040 case TYPE_CODE_RANGE
:
4041 case TYPE_CODE_BOOL
:
4042 case TYPE_CODE_ENUM
:
4043 return INTEGER_CONVERSION_BADNESS
;
4045 return INT_FLOAT_CONVERSION_BADNESS
;
4047 return INCOMPATIBLE_TYPE_BADNESS
;
4051 /* rank_one_type helper for when PARM's type code is TYPE_CODE_BOOL. */
4054 rank_one_type_parm_bool (struct type
*parm
, struct type
*arg
, struct value
*value
)
4056 switch (TYPE_CODE (arg
))
4058 /* n3290 draft, section 4.12.1 (conv.bool):
4060 "A prvalue of arithmetic, unscoped enumeration, pointer, or
4061 pointer to member type can be converted to a prvalue of type
4062 bool. A zero value, null pointer value, or null member pointer
4063 value is converted to false; any other value is converted to
4064 true. A prvalue of type std::nullptr_t can be converted to a
4065 prvalue of type bool; the resulting value is false." */
4067 case TYPE_CODE_CHAR
:
4068 case TYPE_CODE_ENUM
:
4070 case TYPE_CODE_MEMBERPTR
:
4072 return BOOL_CONVERSION_BADNESS
;
4073 case TYPE_CODE_RANGE
:
4074 return INCOMPATIBLE_TYPE_BADNESS
;
4075 case TYPE_CODE_BOOL
:
4076 return EXACT_MATCH_BADNESS
;
4078 return INCOMPATIBLE_TYPE_BADNESS
;
4082 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FLOAT. */
4085 rank_one_type_parm_float (struct type
*parm
, struct type
*arg
, struct value
*value
)
4087 switch (TYPE_CODE (arg
))
4090 if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4091 return FLOAT_PROMOTION_BADNESS
;
4092 else if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4093 return EXACT_MATCH_BADNESS
;
4095 return FLOAT_CONVERSION_BADNESS
;
4097 case TYPE_CODE_BOOL
:
4098 case TYPE_CODE_ENUM
:
4099 case TYPE_CODE_RANGE
:
4100 case TYPE_CODE_CHAR
:
4101 return INT_FLOAT_CONVERSION_BADNESS
;
4103 return INCOMPATIBLE_TYPE_BADNESS
;
4107 /* rank_one_type helper for when PARM's type code is TYPE_CODE_COMPLEX. */
4110 rank_one_type_parm_complex (struct type
*parm
, struct type
*arg
, struct value
*value
)
4112 switch (TYPE_CODE (arg
))
4113 { /* Strictly not needed for C++, but... */
4115 return FLOAT_PROMOTION_BADNESS
;
4116 case TYPE_CODE_COMPLEX
:
4117 return EXACT_MATCH_BADNESS
;
4119 return INCOMPATIBLE_TYPE_BADNESS
;
4123 /* rank_one_type helper for when PARM's type code is TYPE_CODE_STRUCT. */
4126 rank_one_type_parm_struct (struct type
*parm
, struct type
*arg
, struct value
*value
)
4128 struct rank rank
= {0, 0};
4130 switch (TYPE_CODE (arg
))
4132 case TYPE_CODE_STRUCT
:
4133 /* Check for derivation */
4134 rank
.subrank
= distance_to_ancestor (parm
, arg
, 0);
4135 if (rank
.subrank
>= 0)
4136 return sum_ranks (BASE_CONVERSION_BADNESS
, rank
);
4139 return INCOMPATIBLE_TYPE_BADNESS
;
4143 /* rank_one_type helper for when PARM's type code is TYPE_CODE_SET. */
4146 rank_one_type_parm_set (struct type
*parm
, struct type
*arg
, struct value
*value
)
4148 switch (TYPE_CODE (arg
))
4152 return rank_one_type (TYPE_FIELD_TYPE (parm
, 0),
4153 TYPE_FIELD_TYPE (arg
, 0), NULL
);
4155 return INCOMPATIBLE_TYPE_BADNESS
;
4159 /* Compare one type (PARM) for compatibility with another (ARG).
4160 * PARM is intended to be the parameter type of a function; and
4161 * ARG is the supplied argument's type. This function tests if
4162 * the latter can be converted to the former.
4163 * VALUE is the argument's value or NULL if none (or called recursively)
4165 * Return 0 if they are identical types;
4166 * Otherwise, return an integer which corresponds to how compatible
4167 * PARM is to ARG. The higher the return value, the worse the match.
4168 * Generally the "bad" conversions are all uniformly assigned a 100. */
4171 rank_one_type (struct type
*parm
, struct type
*arg
, struct value
*value
)
4173 struct rank rank
= {0,0};
4175 /* Resolve typedefs */
4176 if (TYPE_CODE (parm
) == TYPE_CODE_TYPEDEF
)
4177 parm
= check_typedef (parm
);
4178 if (TYPE_CODE (arg
) == TYPE_CODE_TYPEDEF
)
4179 arg
= check_typedef (arg
);
4181 if (TYPE_IS_REFERENCE (parm
) && value
!= NULL
)
4183 if (VALUE_LVAL (value
) == not_lval
)
4185 /* Rvalues should preferably bind to rvalue references or const
4186 lvalue references. */
4187 if (TYPE_CODE (parm
) == TYPE_CODE_RVALUE_REF
)
4188 rank
.subrank
= REFERENCE_CONVERSION_RVALUE
;
4189 else if (TYPE_CONST (TYPE_TARGET_TYPE (parm
)))
4190 rank
.subrank
= REFERENCE_CONVERSION_CONST_LVALUE
;
4192 return INCOMPATIBLE_TYPE_BADNESS
;
4193 return sum_ranks (rank
, REFERENCE_CONVERSION_BADNESS
);
4197 /* Lvalues should prefer lvalue overloads. */
4198 if (TYPE_CODE (parm
) == TYPE_CODE_RVALUE_REF
)
4200 rank
.subrank
= REFERENCE_CONVERSION_RVALUE
;
4201 return sum_ranks (rank
, REFERENCE_CONVERSION_BADNESS
);
4206 if (types_equal (parm
, arg
))
4208 struct type
*t1
= parm
;
4209 struct type
*t2
= arg
;
4211 /* For pointers and references, compare target type. */
4212 if (TYPE_CODE (parm
) == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (parm
))
4214 t1
= TYPE_TARGET_TYPE (parm
);
4215 t2
= TYPE_TARGET_TYPE (arg
);
4218 /* Make sure they are CV equal, too. */
4219 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4220 rank
.subrank
|= CV_CONVERSION_CONST
;
4221 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4222 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4223 if (rank
.subrank
!= 0)
4224 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4225 return EXACT_MATCH_BADNESS
;
4228 /* See through references, since we can almost make non-references
4231 if (TYPE_IS_REFERENCE (arg
))
4232 return (sum_ranks (rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
),
4233 REFERENCE_CONVERSION_BADNESS
));
4234 if (TYPE_IS_REFERENCE (parm
))
4235 return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
),
4236 REFERENCE_CONVERSION_BADNESS
));
4238 /* Debugging only. */
4239 fprintf_filtered (gdb_stderr
,
4240 "------ Arg is %s [%d], parm is %s [%d]\n",
4241 TYPE_NAME (arg
), TYPE_CODE (arg
),
4242 TYPE_NAME (parm
), TYPE_CODE (parm
));
4244 /* x -> y means arg of type x being supplied for parameter of type y. */
4246 switch (TYPE_CODE (parm
))
4249 return rank_one_type_parm_ptr (parm
, arg
, value
);
4250 case TYPE_CODE_ARRAY
:
4251 return rank_one_type_parm_array (parm
, arg
, value
);
4252 case TYPE_CODE_FUNC
:
4253 return rank_one_type_parm_func (parm
, arg
, value
);
4255 return rank_one_type_parm_int (parm
, arg
, value
);
4256 case TYPE_CODE_ENUM
:
4257 return rank_one_type_parm_enum (parm
, arg
, value
);
4258 case TYPE_CODE_CHAR
:
4259 return rank_one_type_parm_char (parm
, arg
, value
);
4260 case TYPE_CODE_RANGE
:
4261 return rank_one_type_parm_range (parm
, arg
, value
);
4262 case TYPE_CODE_BOOL
:
4263 return rank_one_type_parm_bool (parm
, arg
, value
);
4265 return rank_one_type_parm_float (parm
, arg
, value
);
4266 case TYPE_CODE_COMPLEX
:
4267 return rank_one_type_parm_complex (parm
, arg
, value
);
4268 case TYPE_CODE_STRUCT
:
4269 return rank_one_type_parm_struct (parm
, arg
, value
);
4271 return rank_one_type_parm_set (parm
, arg
, value
);
4273 return INCOMPATIBLE_TYPE_BADNESS
;
4274 } /* switch (TYPE_CODE (arg)) */
4277 /* End of functions for overload resolution. */
4279 /* Routines to pretty-print types. */
4282 print_bit_vector (B_TYPE
*bits
, int nbits
)
4286 for (bitno
= 0; bitno
< nbits
; bitno
++)
4288 if ((bitno
% 8) == 0)
4290 puts_filtered (" ");
4292 if (B_TST (bits
, bitno
))
4293 printf_filtered (("1"));
4295 printf_filtered (("0"));
4299 /* Note the first arg should be the "this" pointer, we may not want to
4300 include it since we may get into a infinitely recursive
4304 print_args (struct field
*args
, int nargs
, int spaces
)
4310 for (i
= 0; i
< nargs
; i
++)
4312 printfi_filtered (spaces
, "[%d] name '%s'\n", i
,
4313 args
[i
].name
!= NULL
? args
[i
].name
: "<NULL>");
4314 recursive_dump_type (args
[i
].type
, spaces
+ 2);
4320 field_is_static (struct field
*f
)
4322 /* "static" fields are the fields whose location is not relative
4323 to the address of the enclosing struct. It would be nice to
4324 have a dedicated flag that would be set for static fields when
4325 the type is being created. But in practice, checking the field
4326 loc_kind should give us an accurate answer. */
4327 return (FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSNAME
4328 || FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSADDR
);
4332 dump_fn_fieldlists (struct type
*type
, int spaces
)
4338 printfi_filtered (spaces
, "fn_fieldlists ");
4339 gdb_print_host_address (TYPE_FN_FIELDLISTS (type
), gdb_stdout
);
4340 printf_filtered ("\n");
4341 for (method_idx
= 0; method_idx
< TYPE_NFN_FIELDS (type
); method_idx
++)
4343 f
= TYPE_FN_FIELDLIST1 (type
, method_idx
);
4344 printfi_filtered (spaces
+ 2, "[%d] name '%s' (",
4346 TYPE_FN_FIELDLIST_NAME (type
, method_idx
));
4347 gdb_print_host_address (TYPE_FN_FIELDLIST_NAME (type
, method_idx
),
4349 printf_filtered (_(") length %d\n"),
4350 TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
));
4351 for (overload_idx
= 0;
4352 overload_idx
< TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
);
4355 printfi_filtered (spaces
+ 4, "[%d] physname '%s' (",
4357 TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
));
4358 gdb_print_host_address (TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
),
4360 printf_filtered (")\n");
4361 printfi_filtered (spaces
+ 8, "type ");
4362 gdb_print_host_address (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4364 printf_filtered ("\n");
4366 recursive_dump_type (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4369 printfi_filtered (spaces
+ 8, "args ");
4370 gdb_print_host_address (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4372 printf_filtered ("\n");
4373 print_args (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4374 TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f
, overload_idx
)),
4376 printfi_filtered (spaces
+ 8, "fcontext ");
4377 gdb_print_host_address (TYPE_FN_FIELD_FCONTEXT (f
, overload_idx
),
4379 printf_filtered ("\n");
4381 printfi_filtered (spaces
+ 8, "is_const %d\n",
4382 TYPE_FN_FIELD_CONST (f
, overload_idx
));
4383 printfi_filtered (spaces
+ 8, "is_volatile %d\n",
4384 TYPE_FN_FIELD_VOLATILE (f
, overload_idx
));
4385 printfi_filtered (spaces
+ 8, "is_private %d\n",
4386 TYPE_FN_FIELD_PRIVATE (f
, overload_idx
));
4387 printfi_filtered (spaces
+ 8, "is_protected %d\n",
4388 TYPE_FN_FIELD_PROTECTED (f
, overload_idx
));
4389 printfi_filtered (spaces
+ 8, "is_stub %d\n",
4390 TYPE_FN_FIELD_STUB (f
, overload_idx
));
4391 printfi_filtered (spaces
+ 8, "voffset %u\n",
4392 TYPE_FN_FIELD_VOFFSET (f
, overload_idx
));
4398 print_cplus_stuff (struct type
*type
, int spaces
)
4400 printfi_filtered (spaces
, "vptr_fieldno %d\n", TYPE_VPTR_FIELDNO (type
));
4401 printfi_filtered (spaces
, "vptr_basetype ");
4402 gdb_print_host_address (TYPE_VPTR_BASETYPE (type
), gdb_stdout
);
4403 puts_filtered ("\n");
4404 if (TYPE_VPTR_BASETYPE (type
) != NULL
)
4405 recursive_dump_type (TYPE_VPTR_BASETYPE (type
), spaces
+ 2);
4407 printfi_filtered (spaces
, "n_baseclasses %d\n",
4408 TYPE_N_BASECLASSES (type
));
4409 printfi_filtered (spaces
, "nfn_fields %d\n",
4410 TYPE_NFN_FIELDS (type
));
4411 if (TYPE_N_BASECLASSES (type
) > 0)
4413 printfi_filtered (spaces
, "virtual_field_bits (%d bits at *",
4414 TYPE_N_BASECLASSES (type
));
4415 gdb_print_host_address (TYPE_FIELD_VIRTUAL_BITS (type
),
4417 printf_filtered (")");
4419 print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type
),
4420 TYPE_N_BASECLASSES (type
));
4421 puts_filtered ("\n");
4423 if (TYPE_NFIELDS (type
) > 0)
4425 if (TYPE_FIELD_PRIVATE_BITS (type
) != NULL
)
4427 printfi_filtered (spaces
,
4428 "private_field_bits (%d bits at *",
4429 TYPE_NFIELDS (type
));
4430 gdb_print_host_address (TYPE_FIELD_PRIVATE_BITS (type
),
4432 printf_filtered (")");
4433 print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type
),
4434 TYPE_NFIELDS (type
));
4435 puts_filtered ("\n");
4437 if (TYPE_FIELD_PROTECTED_BITS (type
) != NULL
)
4439 printfi_filtered (spaces
,
4440 "protected_field_bits (%d bits at *",
4441 TYPE_NFIELDS (type
));
4442 gdb_print_host_address (TYPE_FIELD_PROTECTED_BITS (type
),
4444 printf_filtered (")");
4445 print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type
),
4446 TYPE_NFIELDS (type
));
4447 puts_filtered ("\n");
4450 if (TYPE_NFN_FIELDS (type
) > 0)
4452 dump_fn_fieldlists (type
, spaces
);
4456 /* Print the contents of the TYPE's type_specific union, assuming that
4457 its type-specific kind is TYPE_SPECIFIC_GNAT_STUFF. */
4460 print_gnat_stuff (struct type
*type
, int spaces
)
4462 struct type
*descriptive_type
= TYPE_DESCRIPTIVE_TYPE (type
);
4464 if (descriptive_type
== NULL
)
4465 printfi_filtered (spaces
+ 2, "no descriptive type\n");
4468 printfi_filtered (spaces
+ 2, "descriptive type\n");
4469 recursive_dump_type (descriptive_type
, spaces
+ 4);
4473 static struct obstack dont_print_type_obstack
;
4476 recursive_dump_type (struct type
*type
, int spaces
)
4481 obstack_begin (&dont_print_type_obstack
, 0);
4483 if (TYPE_NFIELDS (type
) > 0
4484 || (HAVE_CPLUS_STRUCT (type
) && TYPE_NFN_FIELDS (type
) > 0))
4486 struct type
**first_dont_print
4487 = (struct type
**) obstack_base (&dont_print_type_obstack
);
4489 int i
= (struct type
**)
4490 obstack_next_free (&dont_print_type_obstack
) - first_dont_print
;
4494 if (type
== first_dont_print
[i
])
4496 printfi_filtered (spaces
, "type node ");
4497 gdb_print_host_address (type
, gdb_stdout
);
4498 printf_filtered (_(" <same as already seen type>\n"));
4503 obstack_ptr_grow (&dont_print_type_obstack
, type
);
4506 printfi_filtered (spaces
, "type node ");
4507 gdb_print_host_address (type
, gdb_stdout
);
4508 printf_filtered ("\n");
4509 printfi_filtered (spaces
, "name '%s' (",
4510 TYPE_NAME (type
) ? TYPE_NAME (type
) : "<NULL>");
4511 gdb_print_host_address (TYPE_NAME (type
), gdb_stdout
);
4512 printf_filtered (")\n");
4513 printfi_filtered (spaces
, "code 0x%x ", TYPE_CODE (type
));
4514 switch (TYPE_CODE (type
))
4516 case TYPE_CODE_UNDEF
:
4517 printf_filtered ("(TYPE_CODE_UNDEF)");
4520 printf_filtered ("(TYPE_CODE_PTR)");
4522 case TYPE_CODE_ARRAY
:
4523 printf_filtered ("(TYPE_CODE_ARRAY)");
4525 case TYPE_CODE_STRUCT
:
4526 printf_filtered ("(TYPE_CODE_STRUCT)");
4528 case TYPE_CODE_UNION
:
4529 printf_filtered ("(TYPE_CODE_UNION)");
4531 case TYPE_CODE_ENUM
:
4532 printf_filtered ("(TYPE_CODE_ENUM)");
4534 case TYPE_CODE_FLAGS
:
4535 printf_filtered ("(TYPE_CODE_FLAGS)");
4537 case TYPE_CODE_FUNC
:
4538 printf_filtered ("(TYPE_CODE_FUNC)");
4541 printf_filtered ("(TYPE_CODE_INT)");
4544 printf_filtered ("(TYPE_CODE_FLT)");
4546 case TYPE_CODE_VOID
:
4547 printf_filtered ("(TYPE_CODE_VOID)");
4550 printf_filtered ("(TYPE_CODE_SET)");
4552 case TYPE_CODE_RANGE
:
4553 printf_filtered ("(TYPE_CODE_RANGE)");
4555 case TYPE_CODE_STRING
:
4556 printf_filtered ("(TYPE_CODE_STRING)");
4558 case TYPE_CODE_ERROR
:
4559 printf_filtered ("(TYPE_CODE_ERROR)");
4561 case TYPE_CODE_MEMBERPTR
:
4562 printf_filtered ("(TYPE_CODE_MEMBERPTR)");
4564 case TYPE_CODE_METHODPTR
:
4565 printf_filtered ("(TYPE_CODE_METHODPTR)");
4567 case TYPE_CODE_METHOD
:
4568 printf_filtered ("(TYPE_CODE_METHOD)");
4571 printf_filtered ("(TYPE_CODE_REF)");
4573 case TYPE_CODE_CHAR
:
4574 printf_filtered ("(TYPE_CODE_CHAR)");
4576 case TYPE_CODE_BOOL
:
4577 printf_filtered ("(TYPE_CODE_BOOL)");
4579 case TYPE_CODE_COMPLEX
:
4580 printf_filtered ("(TYPE_CODE_COMPLEX)");
4582 case TYPE_CODE_TYPEDEF
:
4583 printf_filtered ("(TYPE_CODE_TYPEDEF)");
4585 case TYPE_CODE_NAMESPACE
:
4586 printf_filtered ("(TYPE_CODE_NAMESPACE)");
4589 printf_filtered ("(UNKNOWN TYPE CODE)");
4592 puts_filtered ("\n");
4593 printfi_filtered (spaces
, "length %s\n", pulongest (TYPE_LENGTH (type
)));
4594 if (TYPE_OBJFILE_OWNED (type
))
4596 printfi_filtered (spaces
, "objfile ");
4597 gdb_print_host_address (TYPE_OWNER (type
).objfile
, gdb_stdout
);
4601 printfi_filtered (spaces
, "gdbarch ");
4602 gdb_print_host_address (TYPE_OWNER (type
).gdbarch
, gdb_stdout
);
4604 printf_filtered ("\n");
4605 printfi_filtered (spaces
, "target_type ");
4606 gdb_print_host_address (TYPE_TARGET_TYPE (type
), gdb_stdout
);
4607 printf_filtered ("\n");
4608 if (TYPE_TARGET_TYPE (type
) != NULL
)
4610 recursive_dump_type (TYPE_TARGET_TYPE (type
), spaces
+ 2);
4612 printfi_filtered (spaces
, "pointer_type ");
4613 gdb_print_host_address (TYPE_POINTER_TYPE (type
), gdb_stdout
);
4614 printf_filtered ("\n");
4615 printfi_filtered (spaces
, "reference_type ");
4616 gdb_print_host_address (TYPE_REFERENCE_TYPE (type
), gdb_stdout
);
4617 printf_filtered ("\n");
4618 printfi_filtered (spaces
, "type_chain ");
4619 gdb_print_host_address (TYPE_CHAIN (type
), gdb_stdout
);
4620 printf_filtered ("\n");
4621 printfi_filtered (spaces
, "instance_flags 0x%x",
4622 TYPE_INSTANCE_FLAGS (type
));
4623 if (TYPE_CONST (type
))
4625 puts_filtered (" TYPE_CONST");
4627 if (TYPE_VOLATILE (type
))
4629 puts_filtered (" TYPE_VOLATILE");
4631 if (TYPE_CODE_SPACE (type
))
4633 puts_filtered (" TYPE_CODE_SPACE");
4635 if (TYPE_DATA_SPACE (type
))
4637 puts_filtered (" TYPE_DATA_SPACE");
4639 if (TYPE_ADDRESS_CLASS_1 (type
))
4641 puts_filtered (" TYPE_ADDRESS_CLASS_1");
4643 if (TYPE_ADDRESS_CLASS_2 (type
))
4645 puts_filtered (" TYPE_ADDRESS_CLASS_2");
4647 if (TYPE_RESTRICT (type
))
4649 puts_filtered (" TYPE_RESTRICT");
4651 if (TYPE_ATOMIC (type
))
4653 puts_filtered (" TYPE_ATOMIC");
4655 puts_filtered ("\n");
4657 printfi_filtered (spaces
, "flags");
4658 if (TYPE_UNSIGNED (type
))
4660 puts_filtered (" TYPE_UNSIGNED");
4662 if (TYPE_NOSIGN (type
))
4664 puts_filtered (" TYPE_NOSIGN");
4666 if (TYPE_STUB (type
))
4668 puts_filtered (" TYPE_STUB");
4670 if (TYPE_TARGET_STUB (type
))
4672 puts_filtered (" TYPE_TARGET_STUB");
4674 if (TYPE_PROTOTYPED (type
))
4676 puts_filtered (" TYPE_PROTOTYPED");
4678 if (TYPE_INCOMPLETE (type
))
4680 puts_filtered (" TYPE_INCOMPLETE");
4682 if (TYPE_VARARGS (type
))
4684 puts_filtered (" TYPE_VARARGS");
4686 /* This is used for things like AltiVec registers on ppc. Gcc emits
4687 an attribute for the array type, which tells whether or not we
4688 have a vector, instead of a regular array. */
4689 if (TYPE_VECTOR (type
))
4691 puts_filtered (" TYPE_VECTOR");
4693 if (TYPE_FIXED_INSTANCE (type
))
4695 puts_filtered (" TYPE_FIXED_INSTANCE");
4697 if (TYPE_STUB_SUPPORTED (type
))
4699 puts_filtered (" TYPE_STUB_SUPPORTED");
4701 if (TYPE_NOTTEXT (type
))
4703 puts_filtered (" TYPE_NOTTEXT");
4705 puts_filtered ("\n");
4706 printfi_filtered (spaces
, "nfields %d ", TYPE_NFIELDS (type
));
4707 gdb_print_host_address (TYPE_FIELDS (type
), gdb_stdout
);
4708 puts_filtered ("\n");
4709 for (idx
= 0; idx
< TYPE_NFIELDS (type
); idx
++)
4711 if (TYPE_CODE (type
) == TYPE_CODE_ENUM
)
4712 printfi_filtered (spaces
+ 2,
4713 "[%d] enumval %s type ",
4714 idx
, plongest (TYPE_FIELD_ENUMVAL (type
, idx
)));
4716 printfi_filtered (spaces
+ 2,
4717 "[%d] bitpos %s bitsize %d type ",
4718 idx
, plongest (TYPE_FIELD_BITPOS (type
, idx
)),
4719 TYPE_FIELD_BITSIZE (type
, idx
));
4720 gdb_print_host_address (TYPE_FIELD_TYPE (type
, idx
), gdb_stdout
);
4721 printf_filtered (" name '%s' (",
4722 TYPE_FIELD_NAME (type
, idx
) != NULL
4723 ? TYPE_FIELD_NAME (type
, idx
)
4725 gdb_print_host_address (TYPE_FIELD_NAME (type
, idx
), gdb_stdout
);
4726 printf_filtered (")\n");
4727 if (TYPE_FIELD_TYPE (type
, idx
) != NULL
)
4729 recursive_dump_type (TYPE_FIELD_TYPE (type
, idx
), spaces
+ 4);
4732 if (TYPE_CODE (type
) == TYPE_CODE_RANGE
)
4734 printfi_filtered (spaces
, "low %s%s high %s%s\n",
4735 plongest (TYPE_LOW_BOUND (type
)),
4736 TYPE_LOW_BOUND_UNDEFINED (type
) ? " (undefined)" : "",
4737 plongest (TYPE_HIGH_BOUND (type
)),
4738 TYPE_HIGH_BOUND_UNDEFINED (type
)
4739 ? " (undefined)" : "");
4742 switch (TYPE_SPECIFIC_FIELD (type
))
4744 case TYPE_SPECIFIC_CPLUS_STUFF
:
4745 printfi_filtered (spaces
, "cplus_stuff ");
4746 gdb_print_host_address (TYPE_CPLUS_SPECIFIC (type
),
4748 puts_filtered ("\n");
4749 print_cplus_stuff (type
, spaces
);
4752 case TYPE_SPECIFIC_GNAT_STUFF
:
4753 printfi_filtered (spaces
, "gnat_stuff ");
4754 gdb_print_host_address (TYPE_GNAT_SPECIFIC (type
), gdb_stdout
);
4755 puts_filtered ("\n");
4756 print_gnat_stuff (type
, spaces
);
4759 case TYPE_SPECIFIC_FLOATFORMAT
:
4760 printfi_filtered (spaces
, "floatformat ");
4761 if (TYPE_FLOATFORMAT (type
) == NULL
4762 || TYPE_FLOATFORMAT (type
)->name
== NULL
)
4763 puts_filtered ("(null)");
4765 puts_filtered (TYPE_FLOATFORMAT (type
)->name
);
4766 puts_filtered ("\n");
4769 case TYPE_SPECIFIC_FUNC
:
4770 printfi_filtered (spaces
, "calling_convention %d\n",
4771 TYPE_CALLING_CONVENTION (type
));
4772 /* tail_call_list is not printed. */
4775 case TYPE_SPECIFIC_SELF_TYPE
:
4776 printfi_filtered (spaces
, "self_type ");
4777 gdb_print_host_address (TYPE_SELF_TYPE (type
), gdb_stdout
);
4778 puts_filtered ("\n");
4783 obstack_free (&dont_print_type_obstack
, NULL
);
4786 /* Trivial helpers for the libiberty hash table, for mapping one
4789 struct type_pair
: public allocate_on_obstack
4791 type_pair (struct type
*old_
, struct type
*newobj_
)
4792 : old (old_
), newobj (newobj_
)
4795 struct type
* const old
, * const newobj
;
4799 type_pair_hash (const void *item
)
4801 const struct type_pair
*pair
= (const struct type_pair
*) item
;
4803 return htab_hash_pointer (pair
->old
);
4807 type_pair_eq (const void *item_lhs
, const void *item_rhs
)
4809 const struct type_pair
*lhs
= (const struct type_pair
*) item_lhs
;
4810 const struct type_pair
*rhs
= (const struct type_pair
*) item_rhs
;
4812 return lhs
->old
== rhs
->old
;
4815 /* Allocate the hash table used by copy_type_recursive to walk
4816 types without duplicates. We use OBJFILE's obstack, because
4817 OBJFILE is about to be deleted. */
4820 create_copied_types_hash (struct objfile
*objfile
)
4822 return htab_create_alloc_ex (1, type_pair_hash
, type_pair_eq
,
4823 NULL
, &objfile
->objfile_obstack
,
4824 hashtab_obstack_allocate
,
4825 dummy_obstack_deallocate
);
4828 /* Recursively copy (deep copy) a dynamic attribute list of a type. */
4830 static struct dynamic_prop_list
*
4831 copy_dynamic_prop_list (struct obstack
*objfile_obstack
,
4832 struct dynamic_prop_list
*list
)
4834 struct dynamic_prop_list
*copy
= list
;
4835 struct dynamic_prop_list
**node_ptr
= ©
;
4837 while (*node_ptr
!= NULL
)
4839 struct dynamic_prop_list
*node_copy
;
4841 node_copy
= ((struct dynamic_prop_list
*)
4842 obstack_copy (objfile_obstack
, *node_ptr
,
4843 sizeof (struct dynamic_prop_list
)));
4844 node_copy
->prop
= (*node_ptr
)->prop
;
4845 *node_ptr
= node_copy
;
4847 node_ptr
= &node_copy
->next
;
4853 /* Recursively copy (deep copy) TYPE, if it is associated with
4854 OBJFILE. Return a new type owned by the gdbarch associated with the type, a
4855 saved type if we have already visited TYPE (using COPIED_TYPES), or TYPE if
4856 it is not associated with OBJFILE. */
4859 copy_type_recursive (struct objfile
*objfile
,
4861 htab_t copied_types
)
4864 struct type
*new_type
;
4866 if (! TYPE_OBJFILE_OWNED (type
))
4869 /* This type shouldn't be pointing to any types in other objfiles;
4870 if it did, the type might disappear unexpectedly. */
4871 gdb_assert (TYPE_OBJFILE (type
) == objfile
);
4873 struct type_pair
pair (type
, nullptr);
4875 slot
= htab_find_slot (copied_types
, &pair
, INSERT
);
4877 return ((struct type_pair
*) *slot
)->newobj
;
4879 new_type
= alloc_type_arch (get_type_arch (type
));
4881 /* We must add the new type to the hash table immediately, in case
4882 we encounter this type again during a recursive call below. */
4883 struct type_pair
*stored
4884 = new (&objfile
->objfile_obstack
) struct type_pair (type
, new_type
);
4888 /* Copy the common fields of types. For the main type, we simply
4889 copy the entire thing and then update specific fields as needed. */
4890 *TYPE_MAIN_TYPE (new_type
) = *TYPE_MAIN_TYPE (type
);
4891 TYPE_OBJFILE_OWNED (new_type
) = 0;
4892 TYPE_OWNER (new_type
).gdbarch
= get_type_arch (type
);
4894 if (TYPE_NAME (type
))
4895 TYPE_NAME (new_type
) = xstrdup (TYPE_NAME (type
));
4897 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
4898 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
4900 /* Copy the fields. */
4901 if (TYPE_NFIELDS (type
))
4905 nfields
= TYPE_NFIELDS (type
);
4906 TYPE_FIELDS (new_type
) = (struct field
*)
4907 TYPE_ZALLOC (new_type
, nfields
* sizeof (struct field
));
4908 for (i
= 0; i
< nfields
; i
++)
4910 TYPE_FIELD_ARTIFICIAL (new_type
, i
) =
4911 TYPE_FIELD_ARTIFICIAL (type
, i
);
4912 TYPE_FIELD_BITSIZE (new_type
, i
) = TYPE_FIELD_BITSIZE (type
, i
);
4913 if (TYPE_FIELD_TYPE (type
, i
))
4914 TYPE_FIELD_TYPE (new_type
, i
)
4915 = copy_type_recursive (objfile
, TYPE_FIELD_TYPE (type
, i
),
4917 if (TYPE_FIELD_NAME (type
, i
))
4918 TYPE_FIELD_NAME (new_type
, i
) =
4919 xstrdup (TYPE_FIELD_NAME (type
, i
));
4920 switch (TYPE_FIELD_LOC_KIND (type
, i
))
4922 case FIELD_LOC_KIND_BITPOS
:
4923 SET_FIELD_BITPOS (TYPE_FIELD (new_type
, i
),
4924 TYPE_FIELD_BITPOS (type
, i
));
4926 case FIELD_LOC_KIND_ENUMVAL
:
4927 SET_FIELD_ENUMVAL (TYPE_FIELD (new_type
, i
),
4928 TYPE_FIELD_ENUMVAL (type
, i
));
4930 case FIELD_LOC_KIND_PHYSADDR
:
4931 SET_FIELD_PHYSADDR (TYPE_FIELD (new_type
, i
),
4932 TYPE_FIELD_STATIC_PHYSADDR (type
, i
));
4934 case FIELD_LOC_KIND_PHYSNAME
:
4935 SET_FIELD_PHYSNAME (TYPE_FIELD (new_type
, i
),
4936 xstrdup (TYPE_FIELD_STATIC_PHYSNAME (type
,
4940 internal_error (__FILE__
, __LINE__
,
4941 _("Unexpected type field location kind: %d"),
4942 TYPE_FIELD_LOC_KIND (type
, i
));
4947 /* For range types, copy the bounds information. */
4948 if (TYPE_CODE (type
) == TYPE_CODE_RANGE
)
4950 TYPE_RANGE_DATA (new_type
) = (struct range_bounds
*)
4951 TYPE_ALLOC (new_type
, sizeof (struct range_bounds
));
4952 *TYPE_RANGE_DATA (new_type
) = *TYPE_RANGE_DATA (type
);
4955 if (TYPE_DYN_PROP_LIST (type
) != NULL
)
4956 TYPE_DYN_PROP_LIST (new_type
)
4957 = copy_dynamic_prop_list (&objfile
->objfile_obstack
,
4958 TYPE_DYN_PROP_LIST (type
));
4961 /* Copy pointers to other types. */
4962 if (TYPE_TARGET_TYPE (type
))
4963 TYPE_TARGET_TYPE (new_type
) =
4964 copy_type_recursive (objfile
,
4965 TYPE_TARGET_TYPE (type
),
4968 /* Maybe copy the type_specific bits.
4970 NOTE drow/2005-12-09: We do not copy the C++-specific bits like
4971 base classes and methods. There's no fundamental reason why we
4972 can't, but at the moment it is not needed. */
4974 switch (TYPE_SPECIFIC_FIELD (type
))
4976 case TYPE_SPECIFIC_NONE
:
4978 case TYPE_SPECIFIC_FUNC
:
4979 INIT_FUNC_SPECIFIC (new_type
);
4980 TYPE_CALLING_CONVENTION (new_type
) = TYPE_CALLING_CONVENTION (type
);
4981 TYPE_NO_RETURN (new_type
) = TYPE_NO_RETURN (type
);
4982 TYPE_TAIL_CALL_LIST (new_type
) = NULL
;
4984 case TYPE_SPECIFIC_FLOATFORMAT
:
4985 TYPE_FLOATFORMAT (new_type
) = TYPE_FLOATFORMAT (type
);
4987 case TYPE_SPECIFIC_CPLUS_STUFF
:
4988 INIT_CPLUS_SPECIFIC (new_type
);
4990 case TYPE_SPECIFIC_GNAT_STUFF
:
4991 INIT_GNAT_SPECIFIC (new_type
);
4993 case TYPE_SPECIFIC_SELF_TYPE
:
4994 set_type_self_type (new_type
,
4995 copy_type_recursive (objfile
, TYPE_SELF_TYPE (type
),
4999 gdb_assert_not_reached ("bad type_specific_kind");
5005 /* Make a copy of the given TYPE, except that the pointer & reference
5006 types are not preserved.
5008 This function assumes that the given type has an associated objfile.
5009 This objfile is used to allocate the new type. */
5012 copy_type (const struct type
*type
)
5014 struct type
*new_type
;
5016 gdb_assert (TYPE_OBJFILE_OWNED (type
));
5018 new_type
= alloc_type_copy (type
);
5019 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
5020 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5021 memcpy (TYPE_MAIN_TYPE (new_type
), TYPE_MAIN_TYPE (type
),
5022 sizeof (struct main_type
));
5023 if (TYPE_DYN_PROP_LIST (type
) != NULL
)
5024 TYPE_DYN_PROP_LIST (new_type
)
5025 = copy_dynamic_prop_list (&TYPE_OBJFILE (type
) -> objfile_obstack
,
5026 TYPE_DYN_PROP_LIST (type
));
5031 /* Helper functions to initialize architecture-specific types. */
5033 /* Allocate a type structure associated with GDBARCH and set its
5034 CODE, LENGTH, and NAME fields. */
5037 arch_type (struct gdbarch
*gdbarch
,
5038 enum type_code code
, int bit
, const char *name
)
5042 type
= alloc_type_arch (gdbarch
);
5043 set_type_code (type
, code
);
5044 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
5045 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
5048 TYPE_NAME (type
) = gdbarch_obstack_strdup (gdbarch
, name
);
5053 /* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
5054 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5055 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5058 arch_integer_type (struct gdbarch
*gdbarch
,
5059 int bit
, int unsigned_p
, const char *name
)
5063 t
= arch_type (gdbarch
, TYPE_CODE_INT
, bit
, name
);
5065 TYPE_UNSIGNED (t
) = 1;
5070 /* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
5071 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5072 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5075 arch_character_type (struct gdbarch
*gdbarch
,
5076 int bit
, int unsigned_p
, const char *name
)
5080 t
= arch_type (gdbarch
, TYPE_CODE_CHAR
, bit
, name
);
5082 TYPE_UNSIGNED (t
) = 1;
5087 /* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
5088 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5089 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5092 arch_boolean_type (struct gdbarch
*gdbarch
,
5093 int bit
, int unsigned_p
, const char *name
)
5097 t
= arch_type (gdbarch
, TYPE_CODE_BOOL
, bit
, name
);
5099 TYPE_UNSIGNED (t
) = 1;
5104 /* Allocate a TYPE_CODE_FLT type structure associated with GDBARCH.
5105 BIT is the type size in bits; if BIT equals -1, the size is
5106 determined by the floatformat. NAME is the type name. Set the
5107 TYPE_FLOATFORMAT from FLOATFORMATS. */
5110 arch_float_type (struct gdbarch
*gdbarch
,
5111 int bit
, const char *name
,
5112 const struct floatformat
**floatformats
)
5114 const struct floatformat
*fmt
= floatformats
[gdbarch_byte_order (gdbarch
)];
5117 bit
= verify_floatformat (bit
, fmt
);
5118 t
= arch_type (gdbarch
, TYPE_CODE_FLT
, bit
, name
);
5119 TYPE_FLOATFORMAT (t
) = fmt
;
5124 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with GDBARCH.
5125 BIT is the type size in bits. NAME is the type name. */
5128 arch_decfloat_type (struct gdbarch
*gdbarch
, int bit
, const char *name
)
5132 t
= arch_type (gdbarch
, TYPE_CODE_DECFLOAT
, bit
, name
);
5136 /* Allocate a TYPE_CODE_COMPLEX type structure associated with GDBARCH.
5137 NAME is the type name. TARGET_TYPE is the component float type. */
5140 arch_complex_type (struct gdbarch
*gdbarch
,
5141 const char *name
, struct type
*target_type
)
5145 t
= arch_type (gdbarch
, TYPE_CODE_COMPLEX
,
5146 2 * TYPE_LENGTH (target_type
) * TARGET_CHAR_BIT
, name
);
5147 TYPE_TARGET_TYPE (t
) = target_type
;
5151 /* Allocate a TYPE_CODE_PTR type structure associated with GDBARCH.
5152 BIT is the pointer type size in bits. NAME is the type name.
5153 TARGET_TYPE is the pointer target type. Always sets the pointer type's
5154 TYPE_UNSIGNED flag. */
5157 arch_pointer_type (struct gdbarch
*gdbarch
,
5158 int bit
, const char *name
, struct type
*target_type
)
5162 t
= arch_type (gdbarch
, TYPE_CODE_PTR
, bit
, name
);
5163 TYPE_TARGET_TYPE (t
) = target_type
;
5164 TYPE_UNSIGNED (t
) = 1;
5168 /* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
5169 NAME is the type name. BIT is the size of the flag word in bits. */
5172 arch_flags_type (struct gdbarch
*gdbarch
, const char *name
, int bit
)
5176 type
= arch_type (gdbarch
, TYPE_CODE_FLAGS
, bit
, name
);
5177 TYPE_UNSIGNED (type
) = 1;
5178 TYPE_NFIELDS (type
) = 0;
5179 /* Pre-allocate enough space assuming every field is one bit. */
5181 = (struct field
*) TYPE_ZALLOC (type
, bit
* sizeof (struct field
));
5186 /* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5187 position BITPOS is called NAME. Pass NAME as "" for fields that
5188 should not be printed. */
5191 append_flags_type_field (struct type
*type
, int start_bitpos
, int nr_bits
,
5192 struct type
*field_type
, const char *name
)
5194 int type_bitsize
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
5195 int field_nr
= TYPE_NFIELDS (type
);
5197 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_FLAGS
);
5198 gdb_assert (TYPE_NFIELDS (type
) + 1 <= type_bitsize
);
5199 gdb_assert (start_bitpos
>= 0 && start_bitpos
< type_bitsize
);
5200 gdb_assert (nr_bits
>= 1 && nr_bits
<= type_bitsize
);
5201 gdb_assert (name
!= NULL
);
5203 TYPE_FIELD_NAME (type
, field_nr
) = xstrdup (name
);
5204 TYPE_FIELD_TYPE (type
, field_nr
) = field_type
;
5205 SET_FIELD_BITPOS (TYPE_FIELD (type
, field_nr
), start_bitpos
);
5206 TYPE_FIELD_BITSIZE (type
, field_nr
) = nr_bits
;
5207 ++TYPE_NFIELDS (type
);
5210 /* Special version of append_flags_type_field to add a flag field.
5211 Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5212 position BITPOS is called NAME. */
5215 append_flags_type_flag (struct type
*type
, int bitpos
, const char *name
)
5217 struct gdbarch
*gdbarch
= get_type_arch (type
);
5219 append_flags_type_field (type
, bitpos
, 1,
5220 builtin_type (gdbarch
)->builtin_bool
,
5224 /* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
5225 specified by CODE) associated with GDBARCH. NAME is the type name. */
5228 arch_composite_type (struct gdbarch
*gdbarch
, const char *name
,
5229 enum type_code code
)
5233 gdb_assert (code
== TYPE_CODE_STRUCT
|| code
== TYPE_CODE_UNION
);
5234 t
= arch_type (gdbarch
, code
, 0, NULL
);
5235 TYPE_NAME (t
) = name
;
5236 INIT_CPLUS_SPECIFIC (t
);
5240 /* Add new field with name NAME and type FIELD to composite type T.
5241 Do not set the field's position or adjust the type's length;
5242 the caller should do so. Return the new field. */
5245 append_composite_type_field_raw (struct type
*t
, const char *name
,
5250 TYPE_NFIELDS (t
) = TYPE_NFIELDS (t
) + 1;
5251 TYPE_FIELDS (t
) = XRESIZEVEC (struct field
, TYPE_FIELDS (t
),
5253 f
= &(TYPE_FIELDS (t
)[TYPE_NFIELDS (t
) - 1]);
5254 memset (f
, 0, sizeof f
[0]);
5255 FIELD_TYPE (f
[0]) = field
;
5256 FIELD_NAME (f
[0]) = name
;
5260 /* Add new field with name NAME and type FIELD to composite type T.
5261 ALIGNMENT (if non-zero) specifies the minimum field alignment. */
5264 append_composite_type_field_aligned (struct type
*t
, const char *name
,
5265 struct type
*field
, int alignment
)
5267 struct field
*f
= append_composite_type_field_raw (t
, name
, field
);
5269 if (TYPE_CODE (t
) == TYPE_CODE_UNION
)
5271 if (TYPE_LENGTH (t
) < TYPE_LENGTH (field
))
5272 TYPE_LENGTH (t
) = TYPE_LENGTH (field
);
5274 else if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
5276 TYPE_LENGTH (t
) = TYPE_LENGTH (t
) + TYPE_LENGTH (field
);
5277 if (TYPE_NFIELDS (t
) > 1)
5279 SET_FIELD_BITPOS (f
[0],
5280 (FIELD_BITPOS (f
[-1])
5281 + (TYPE_LENGTH (FIELD_TYPE (f
[-1]))
5282 * TARGET_CHAR_BIT
)));
5288 alignment
*= TARGET_CHAR_BIT
;
5289 left
= FIELD_BITPOS (f
[0]) % alignment
;
5293 SET_FIELD_BITPOS (f
[0], FIELD_BITPOS (f
[0]) + (alignment
- left
));
5294 TYPE_LENGTH (t
) += (alignment
- left
) / TARGET_CHAR_BIT
;
5301 /* Add new field with name NAME and type FIELD to composite type T. */
5304 append_composite_type_field (struct type
*t
, const char *name
,
5307 append_composite_type_field_aligned (t
, name
, field
, 0);
5310 static struct gdbarch_data
*gdbtypes_data
;
5312 const struct builtin_type
*
5313 builtin_type (struct gdbarch
*gdbarch
)
5315 return (const struct builtin_type
*) gdbarch_data (gdbarch
, gdbtypes_data
);
5319 gdbtypes_post_init (struct gdbarch
*gdbarch
)
5321 struct builtin_type
*builtin_type
5322 = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct builtin_type
);
5325 builtin_type
->builtin_void
5326 = arch_type (gdbarch
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5327 builtin_type
->builtin_char
5328 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5329 !gdbarch_char_signed (gdbarch
), "char");
5330 TYPE_NOSIGN (builtin_type
->builtin_char
) = 1;
5331 builtin_type
->builtin_signed_char
5332 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5334 builtin_type
->builtin_unsigned_char
5335 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5336 1, "unsigned char");
5337 builtin_type
->builtin_short
5338 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5340 builtin_type
->builtin_unsigned_short
5341 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5342 1, "unsigned short");
5343 builtin_type
->builtin_int
5344 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5346 builtin_type
->builtin_unsigned_int
5347 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5349 builtin_type
->builtin_long
5350 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5352 builtin_type
->builtin_unsigned_long
5353 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5354 1, "unsigned long");
5355 builtin_type
->builtin_long_long
5356 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5358 builtin_type
->builtin_unsigned_long_long
5359 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5360 1, "unsigned long long");
5361 builtin_type
->builtin_float
5362 = arch_float_type (gdbarch
, gdbarch_float_bit (gdbarch
),
5363 "float", gdbarch_float_format (gdbarch
));
5364 builtin_type
->builtin_double
5365 = arch_float_type (gdbarch
, gdbarch_double_bit (gdbarch
),
5366 "double", gdbarch_double_format (gdbarch
));
5367 builtin_type
->builtin_long_double
5368 = arch_float_type (gdbarch
, gdbarch_long_double_bit (gdbarch
),
5369 "long double", gdbarch_long_double_format (gdbarch
));
5370 builtin_type
->builtin_complex
5371 = arch_complex_type (gdbarch
, "complex",
5372 builtin_type
->builtin_float
);
5373 builtin_type
->builtin_double_complex
5374 = arch_complex_type (gdbarch
, "double complex",
5375 builtin_type
->builtin_double
);
5376 builtin_type
->builtin_string
5377 = arch_type (gdbarch
, TYPE_CODE_STRING
, TARGET_CHAR_BIT
, "string");
5378 builtin_type
->builtin_bool
5379 = arch_type (gdbarch
, TYPE_CODE_BOOL
, TARGET_CHAR_BIT
, "bool");
5381 /* The following three are about decimal floating point types, which
5382 are 32-bits, 64-bits and 128-bits respectively. */
5383 builtin_type
->builtin_decfloat
5384 = arch_decfloat_type (gdbarch
, 32, "_Decimal32");
5385 builtin_type
->builtin_decdouble
5386 = arch_decfloat_type (gdbarch
, 64, "_Decimal64");
5387 builtin_type
->builtin_declong
5388 = arch_decfloat_type (gdbarch
, 128, "_Decimal128");
5390 /* "True" character types. */
5391 builtin_type
->builtin_true_char
5392 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 0, "true character");
5393 builtin_type
->builtin_true_unsigned_char
5394 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 1, "true character");
5396 /* Fixed-size integer types. */
5397 builtin_type
->builtin_int0
5398 = arch_integer_type (gdbarch
, 0, 0, "int0_t");
5399 builtin_type
->builtin_int8
5400 = arch_integer_type (gdbarch
, 8, 0, "int8_t");
5401 builtin_type
->builtin_uint8
5402 = arch_integer_type (gdbarch
, 8, 1, "uint8_t");
5403 builtin_type
->builtin_int16
5404 = arch_integer_type (gdbarch
, 16, 0, "int16_t");
5405 builtin_type
->builtin_uint16
5406 = arch_integer_type (gdbarch
, 16, 1, "uint16_t");
5407 builtin_type
->builtin_int24
5408 = arch_integer_type (gdbarch
, 24, 0, "int24_t");
5409 builtin_type
->builtin_uint24
5410 = arch_integer_type (gdbarch
, 24, 1, "uint24_t");
5411 builtin_type
->builtin_int32
5412 = arch_integer_type (gdbarch
, 32, 0, "int32_t");
5413 builtin_type
->builtin_uint32
5414 = arch_integer_type (gdbarch
, 32, 1, "uint32_t");
5415 builtin_type
->builtin_int64
5416 = arch_integer_type (gdbarch
, 64, 0, "int64_t");
5417 builtin_type
->builtin_uint64
5418 = arch_integer_type (gdbarch
, 64, 1, "uint64_t");
5419 builtin_type
->builtin_int128
5420 = arch_integer_type (gdbarch
, 128, 0, "int128_t");
5421 builtin_type
->builtin_uint128
5422 = arch_integer_type (gdbarch
, 128, 1, "uint128_t");
5423 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_int8
) |=
5424 TYPE_INSTANCE_FLAG_NOTTEXT
;
5425 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_uint8
) |=
5426 TYPE_INSTANCE_FLAG_NOTTEXT
;
5428 /* Wide character types. */
5429 builtin_type
->builtin_char16
5430 = arch_integer_type (gdbarch
, 16, 1, "char16_t");
5431 builtin_type
->builtin_char32
5432 = arch_integer_type (gdbarch
, 32, 1, "char32_t");
5433 builtin_type
->builtin_wchar
5434 = arch_integer_type (gdbarch
, gdbarch_wchar_bit (gdbarch
),
5435 !gdbarch_wchar_signed (gdbarch
), "wchar_t");
5437 /* Default data/code pointer types. */
5438 builtin_type
->builtin_data_ptr
5439 = lookup_pointer_type (builtin_type
->builtin_void
);
5440 builtin_type
->builtin_func_ptr
5441 = lookup_pointer_type (lookup_function_type (builtin_type
->builtin_void
));
5442 builtin_type
->builtin_func_func
5443 = lookup_function_type (builtin_type
->builtin_func_ptr
);
5445 /* This type represents a GDB internal function. */
5446 builtin_type
->internal_fn
5447 = arch_type (gdbarch
, TYPE_CODE_INTERNAL_FUNCTION
, 0,
5448 "<internal function>");
5450 /* This type represents an xmethod. */
5451 builtin_type
->xmethod
5452 = arch_type (gdbarch
, TYPE_CODE_XMETHOD
, 0, "<xmethod>");
5454 return builtin_type
;
5457 /* This set of objfile-based types is intended to be used by symbol
5458 readers as basic types. */
5460 static const struct objfile_data
*objfile_type_data
;
5462 const struct objfile_type
*
5463 objfile_type (struct objfile
*objfile
)
5465 struct gdbarch
*gdbarch
;
5466 struct objfile_type
*objfile_type
5467 = (struct objfile_type
*) objfile_data (objfile
, objfile_type_data
);
5470 return objfile_type
;
5472 objfile_type
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
5473 1, struct objfile_type
);
5475 /* Use the objfile architecture to determine basic type properties. */
5476 gdbarch
= get_objfile_arch (objfile
);
5479 objfile_type
->builtin_void
5480 = init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5481 objfile_type
->builtin_char
5482 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5483 !gdbarch_char_signed (gdbarch
), "char");
5484 TYPE_NOSIGN (objfile_type
->builtin_char
) = 1;
5485 objfile_type
->builtin_signed_char
5486 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5488 objfile_type
->builtin_unsigned_char
5489 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5490 1, "unsigned char");
5491 objfile_type
->builtin_short
5492 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5494 objfile_type
->builtin_unsigned_short
5495 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5496 1, "unsigned short");
5497 objfile_type
->builtin_int
5498 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5500 objfile_type
->builtin_unsigned_int
5501 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5503 objfile_type
->builtin_long
5504 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5506 objfile_type
->builtin_unsigned_long
5507 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5508 1, "unsigned long");
5509 objfile_type
->builtin_long_long
5510 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5512 objfile_type
->builtin_unsigned_long_long
5513 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5514 1, "unsigned long long");
5515 objfile_type
->builtin_float
5516 = init_float_type (objfile
, gdbarch_float_bit (gdbarch
),
5517 "float", gdbarch_float_format (gdbarch
));
5518 objfile_type
->builtin_double
5519 = init_float_type (objfile
, gdbarch_double_bit (gdbarch
),
5520 "double", gdbarch_double_format (gdbarch
));
5521 objfile_type
->builtin_long_double
5522 = init_float_type (objfile
, gdbarch_long_double_bit (gdbarch
),
5523 "long double", gdbarch_long_double_format (gdbarch
));
5525 /* This type represents a type that was unrecognized in symbol read-in. */
5526 objfile_type
->builtin_error
5527 = init_type (objfile
, TYPE_CODE_ERROR
, 0, "<unknown type>");
5529 /* The following set of types is used for symbols with no
5530 debug information. */
5531 objfile_type
->nodebug_text_symbol
5532 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5533 "<text variable, no debug info>");
5534 objfile_type
->nodebug_text_gnu_ifunc_symbol
5535 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5536 "<text gnu-indirect-function variable, no debug info>");
5537 TYPE_GNU_IFUNC (objfile_type
->nodebug_text_gnu_ifunc_symbol
) = 1;
5538 objfile_type
->nodebug_got_plt_symbol
5539 = init_pointer_type (objfile
, gdbarch_addr_bit (gdbarch
),
5540 "<text from jump slot in .got.plt, no debug info>",
5541 objfile_type
->nodebug_text_symbol
);
5542 objfile_type
->nodebug_data_symbol
5543 = init_nodebug_var_type (objfile
, "<data variable, no debug info>");
5544 objfile_type
->nodebug_unknown_symbol
5545 = init_nodebug_var_type (objfile
, "<variable (not text or data), no debug info>");
5546 objfile_type
->nodebug_tls_symbol
5547 = init_nodebug_var_type (objfile
, "<thread local variable, no debug info>");
5549 /* NOTE: on some targets, addresses and pointers are not necessarily
5553 - gdb's `struct type' always describes the target's
5555 - gdb's `struct value' objects should always hold values in
5557 - gdb's CORE_ADDR values are addresses in the unified virtual
5558 address space that the assembler and linker work with. Thus,
5559 since target_read_memory takes a CORE_ADDR as an argument, it
5560 can access any memory on the target, even if the processor has
5561 separate code and data address spaces.
5563 In this context, objfile_type->builtin_core_addr is a bit odd:
5564 it's a target type for a value the target will never see. It's
5565 only used to hold the values of (typeless) linker symbols, which
5566 are indeed in the unified virtual address space. */
5568 objfile_type
->builtin_core_addr
5569 = init_integer_type (objfile
, gdbarch_addr_bit (gdbarch
), 1,
5572 set_objfile_data (objfile
, objfile_type_data
, objfile_type
);
5573 return objfile_type
;
5577 _initialize_gdbtypes (void)
5579 gdbtypes_data
= gdbarch_data_register_post_init (gdbtypes_post_init
);
5580 objfile_type_data
= register_objfile_data ();
5582 add_setshow_zuinteger_cmd ("overload", no_class
, &overload_debug
,
5583 _("Set debugging of C++ overloading."),
5584 _("Show debugging of C++ overloading."),
5585 _("When enabled, ranking of the "
5586 "functions is displayed."),
5588 show_overload_debug
,
5589 &setdebuglist
, &showdebuglist
);
5591 /* Add user knob for controlling resolution of opaque types. */
5592 add_setshow_boolean_cmd ("opaque-type-resolution", class_support
,
5593 &opaque_type_resolution
,
5594 _("Set resolution of opaque struct/class/union"
5595 " types (if set before loading symbols)."),
5596 _("Show resolution of opaque struct/class/union"
5597 " types (if set before loading symbols)."),
5599 show_opaque_type_resolution
,
5600 &setlist
, &showlist
);
5602 /* Add an option to permit non-strict type checking. */
5603 add_setshow_boolean_cmd ("type", class_support
,
5604 &strict_type_checking
,
5605 _("Set strict type checking."),
5606 _("Show strict type checking."),
5608 show_strict_type_checking
,
5609 &setchecklist
, &showchecklist
);