1 /* Support routines for manipulating internal types for GDB.
3 Copyright (C) 1992-2020 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 "dwarf2/loc.h"
41 #include "floatformat.h"
44 /* Initialize BADNESS constants. */
46 const struct rank LENGTH_MISMATCH_BADNESS
= {100,0};
48 const struct rank TOO_FEW_PARAMS_BADNESS
= {100,0};
49 const struct rank INCOMPATIBLE_TYPE_BADNESS
= {100,0};
51 const struct rank EXACT_MATCH_BADNESS
= {0,0};
53 const struct rank INTEGER_PROMOTION_BADNESS
= {1,0};
54 const struct rank FLOAT_PROMOTION_BADNESS
= {1,0};
55 const struct rank BASE_PTR_CONVERSION_BADNESS
= {1,0};
56 const struct rank CV_CONVERSION_BADNESS
= {1, 0};
57 const struct rank INTEGER_CONVERSION_BADNESS
= {2,0};
58 const struct rank FLOAT_CONVERSION_BADNESS
= {2,0};
59 const struct rank INT_FLOAT_CONVERSION_BADNESS
= {2,0};
60 const struct rank VOID_PTR_CONVERSION_BADNESS
= {2,0};
61 const struct rank BOOL_CONVERSION_BADNESS
= {3,0};
62 const struct rank BASE_CONVERSION_BADNESS
= {2,0};
63 const struct rank REFERENCE_CONVERSION_BADNESS
= {2,0};
64 const struct rank REFERENCE_SEE_THROUGH_BADNESS
= {0,1};
65 const struct rank NULL_POINTER_CONVERSION_BADNESS
= {2,0};
66 const struct rank NS_POINTER_CONVERSION_BADNESS
= {10,0};
67 const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS
= {3,0};
69 /* Floatformat pairs. */
70 const struct floatformat
*floatformats_ieee_half
[BFD_ENDIAN_UNKNOWN
] = {
71 &floatformat_ieee_half_big
,
72 &floatformat_ieee_half_little
74 const struct floatformat
*floatformats_ieee_single
[BFD_ENDIAN_UNKNOWN
] = {
75 &floatformat_ieee_single_big
,
76 &floatformat_ieee_single_little
78 const struct floatformat
*floatformats_ieee_double
[BFD_ENDIAN_UNKNOWN
] = {
79 &floatformat_ieee_double_big
,
80 &floatformat_ieee_double_little
82 const struct floatformat
*floatformats_ieee_double_littlebyte_bigword
[BFD_ENDIAN_UNKNOWN
] = {
83 &floatformat_ieee_double_big
,
84 &floatformat_ieee_double_littlebyte_bigword
86 const struct floatformat
*floatformats_i387_ext
[BFD_ENDIAN_UNKNOWN
] = {
87 &floatformat_i387_ext
,
90 const struct floatformat
*floatformats_m68881_ext
[BFD_ENDIAN_UNKNOWN
] = {
91 &floatformat_m68881_ext
,
92 &floatformat_m68881_ext
94 const struct floatformat
*floatformats_arm_ext
[BFD_ENDIAN_UNKNOWN
] = {
95 &floatformat_arm_ext_big
,
96 &floatformat_arm_ext_littlebyte_bigword
98 const struct floatformat
*floatformats_ia64_spill
[BFD_ENDIAN_UNKNOWN
] = {
99 &floatformat_ia64_spill_big
,
100 &floatformat_ia64_spill_little
102 const struct floatformat
*floatformats_ia64_quad
[BFD_ENDIAN_UNKNOWN
] = {
103 &floatformat_ia64_quad_big
,
104 &floatformat_ia64_quad_little
106 const struct floatformat
*floatformats_vax_f
[BFD_ENDIAN_UNKNOWN
] = {
110 const struct floatformat
*floatformats_vax_d
[BFD_ENDIAN_UNKNOWN
] = {
114 const struct floatformat
*floatformats_ibm_long_double
[BFD_ENDIAN_UNKNOWN
] = {
115 &floatformat_ibm_long_double_big
,
116 &floatformat_ibm_long_double_little
119 /* Should opaque types be resolved? */
121 static bool opaque_type_resolution
= true;
123 /* See gdbtypes.h. */
125 unsigned int overload_debug
= 0;
127 /* A flag to enable strict type checking. */
129 static bool strict_type_checking
= true;
131 /* A function to show whether opaque types are resolved. */
134 show_opaque_type_resolution (struct ui_file
*file
, int from_tty
,
135 struct cmd_list_element
*c
,
138 fprintf_filtered (file
, _("Resolution of opaque struct/class/union types "
139 "(if set before loading symbols) is %s.\n"),
143 /* A function to show whether C++ overload debugging is enabled. */
146 show_overload_debug (struct ui_file
*file
, int from_tty
,
147 struct cmd_list_element
*c
, const char *value
)
149 fprintf_filtered (file
, _("Debugging of C++ overloading is %s.\n"),
153 /* A function to show the status of strict type checking. */
156 show_strict_type_checking (struct ui_file
*file
, int from_tty
,
157 struct cmd_list_element
*c
, const char *value
)
159 fprintf_filtered (file
, _("Strict type checking is %s.\n"), value
);
163 /* Allocate a new OBJFILE-associated type structure and fill it
164 with some defaults. Space for the type structure is allocated
165 on the objfile's objfile_obstack. */
168 alloc_type (struct objfile
*objfile
)
172 gdb_assert (objfile
!= NULL
);
174 /* Alloc the structure and start off with all fields zeroed. */
175 type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct type
);
176 TYPE_MAIN_TYPE (type
) = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
178 OBJSTAT (objfile
, n_types
++);
180 TYPE_OBJFILE_OWNED (type
) = 1;
181 TYPE_OWNER (type
).objfile
= objfile
;
183 /* Initialize the fields that might not be zero. */
185 type
->set_code (TYPE_CODE_UNDEF
);
186 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
191 /* Allocate a new GDBARCH-associated type structure and fill it
192 with some defaults. Space for the type structure is allocated
193 on the obstack associated with GDBARCH. */
196 alloc_type_arch (struct gdbarch
*gdbarch
)
200 gdb_assert (gdbarch
!= NULL
);
202 /* Alloc the structure and start off with all fields zeroed. */
204 type
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct type
);
205 TYPE_MAIN_TYPE (type
) = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct main_type
);
207 TYPE_OBJFILE_OWNED (type
) = 0;
208 TYPE_OWNER (type
).gdbarch
= gdbarch
;
210 /* Initialize the fields that might not be zero. */
212 type
->set_code (TYPE_CODE_UNDEF
);
213 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
218 /* If TYPE is objfile-associated, allocate a new type structure
219 associated with the same objfile. If TYPE is gdbarch-associated,
220 allocate a new type structure associated with the same gdbarch. */
223 alloc_type_copy (const struct type
*type
)
225 if (TYPE_OBJFILE_OWNED (type
))
226 return alloc_type (TYPE_OWNER (type
).objfile
);
228 return alloc_type_arch (TYPE_OWNER (type
).gdbarch
);
231 /* If TYPE is gdbarch-associated, return that architecture.
232 If TYPE is objfile-associated, return that objfile's architecture. */
235 get_type_arch (const struct type
*type
)
237 struct gdbarch
*arch
;
239 if (TYPE_OBJFILE_OWNED (type
))
240 arch
= TYPE_OWNER (type
).objfile
->arch ();
242 arch
= TYPE_OWNER (type
).gdbarch
;
244 /* The ARCH can be NULL if TYPE is associated with neither an objfile nor
245 a gdbarch, however, this is very rare, and even then, in most cases
246 that get_type_arch is called, we assume that a non-NULL value is
248 gdb_assert (arch
!= NULL
);
252 /* See gdbtypes.h. */
255 get_target_type (struct type
*type
)
259 type
= TYPE_TARGET_TYPE (type
);
261 type
= check_typedef (type
);
267 /* See gdbtypes.h. */
270 type_length_units (struct type
*type
)
272 struct gdbarch
*arch
= get_type_arch (type
);
273 int unit_size
= gdbarch_addressable_memory_unit_size (arch
);
275 return TYPE_LENGTH (type
) / unit_size
;
278 /* Alloc a new type instance structure, fill it with some defaults,
279 and point it at OLDTYPE. Allocate the new type instance from the
280 same place as OLDTYPE. */
283 alloc_type_instance (struct type
*oldtype
)
287 /* Allocate the structure. */
289 if (! TYPE_OBJFILE_OWNED (oldtype
))
290 type
= GDBARCH_OBSTACK_ZALLOC (get_type_arch (oldtype
), struct type
);
292 type
= OBSTACK_ZALLOC (&TYPE_OBJFILE (oldtype
)->objfile_obstack
,
295 TYPE_MAIN_TYPE (type
) = TYPE_MAIN_TYPE (oldtype
);
297 TYPE_CHAIN (type
) = type
; /* Chain back to itself for now. */
302 /* Clear all remnants of the previous type at TYPE, in preparation for
303 replacing it with something else. Preserve owner information. */
306 smash_type (struct type
*type
)
308 int objfile_owned
= TYPE_OBJFILE_OWNED (type
);
309 union type_owner owner
= TYPE_OWNER (type
);
311 memset (TYPE_MAIN_TYPE (type
), 0, sizeof (struct main_type
));
313 /* Restore owner information. */
314 TYPE_OBJFILE_OWNED (type
) = objfile_owned
;
315 TYPE_OWNER (type
) = owner
;
317 /* For now, delete the rings. */
318 TYPE_CHAIN (type
) = type
;
320 /* For now, leave the pointer/reference types alone. */
323 /* Lookup a pointer to a type TYPE. TYPEPTR, if nonzero, points
324 to a pointer to memory where the pointer type should be stored.
325 If *TYPEPTR is zero, update it to point to the pointer type we return.
326 We allocate new memory if needed. */
329 make_pointer_type (struct type
*type
, struct type
**typeptr
)
331 struct type
*ntype
; /* New type */
334 ntype
= TYPE_POINTER_TYPE (type
);
339 return ntype
; /* Don't care about alloc,
340 and have new type. */
341 else if (*typeptr
== 0)
343 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
348 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
350 ntype
= alloc_type_copy (type
);
354 else /* We have storage, but need to reset it. */
357 chain
= TYPE_CHAIN (ntype
);
359 TYPE_CHAIN (ntype
) = chain
;
362 TYPE_TARGET_TYPE (ntype
) = type
;
363 TYPE_POINTER_TYPE (type
) = ntype
;
365 /* FIXME! Assumes the machine has only one representation for pointers! */
368 = gdbarch_ptr_bit (get_type_arch (type
)) / TARGET_CHAR_BIT
;
369 ntype
->set_code (TYPE_CODE_PTR
);
371 /* Mark pointers as unsigned. The target converts between pointers
372 and addresses (CORE_ADDRs) using gdbarch_pointer_to_address and
373 gdbarch_address_to_pointer. */
374 TYPE_UNSIGNED (ntype
) = 1;
376 /* Update the length of all the other variants of this type. */
377 chain
= TYPE_CHAIN (ntype
);
378 while (chain
!= ntype
)
380 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
381 chain
= TYPE_CHAIN (chain
);
387 /* Given a type TYPE, return a type of pointers to that type.
388 May need to construct such a type if this is the first use. */
391 lookup_pointer_type (struct type
*type
)
393 return make_pointer_type (type
, (struct type
**) 0);
396 /* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero,
397 points to a pointer to memory where the reference type should be
398 stored. If *TYPEPTR is zero, update it to point to the reference
399 type we return. We allocate new memory if needed. REFCODE denotes
400 the kind of reference type to lookup (lvalue or rvalue reference). */
403 make_reference_type (struct type
*type
, struct type
**typeptr
,
404 enum type_code refcode
)
406 struct type
*ntype
; /* New type */
407 struct type
**reftype
;
410 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
412 ntype
= (refcode
== TYPE_CODE_REF
? TYPE_REFERENCE_TYPE (type
)
413 : TYPE_RVALUE_REFERENCE_TYPE (type
));
418 return ntype
; /* Don't care about alloc,
419 and have new type. */
420 else if (*typeptr
== 0)
422 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
427 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
429 ntype
= alloc_type_copy (type
);
433 else /* We have storage, but need to reset it. */
436 chain
= TYPE_CHAIN (ntype
);
438 TYPE_CHAIN (ntype
) = chain
;
441 TYPE_TARGET_TYPE (ntype
) = type
;
442 reftype
= (refcode
== TYPE_CODE_REF
? &TYPE_REFERENCE_TYPE (type
)
443 : &TYPE_RVALUE_REFERENCE_TYPE (type
));
447 /* FIXME! Assume the machine has only one representation for
448 references, and that it matches the (only) representation for
451 TYPE_LENGTH (ntype
) =
452 gdbarch_ptr_bit (get_type_arch (type
)) / TARGET_CHAR_BIT
;
453 ntype
->set_code (refcode
);
457 /* Update the length of all the other variants of this type. */
458 chain
= TYPE_CHAIN (ntype
);
459 while (chain
!= ntype
)
461 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
462 chain
= TYPE_CHAIN (chain
);
468 /* Same as above, but caller doesn't care about memory allocation
472 lookup_reference_type (struct type
*type
, enum type_code refcode
)
474 return make_reference_type (type
, (struct type
**) 0, refcode
);
477 /* Lookup the lvalue reference type for the type TYPE. */
480 lookup_lvalue_reference_type (struct type
*type
)
482 return lookup_reference_type (type
, TYPE_CODE_REF
);
485 /* Lookup the rvalue reference type for the type TYPE. */
488 lookup_rvalue_reference_type (struct type
*type
)
490 return lookup_reference_type (type
, TYPE_CODE_RVALUE_REF
);
493 /* Lookup a function type that returns type TYPE. TYPEPTR, if
494 nonzero, points to a pointer to memory where the function type
495 should be stored. If *TYPEPTR is zero, update it to point to the
496 function type we return. We allocate new memory if needed. */
499 make_function_type (struct type
*type
, struct type
**typeptr
)
501 struct type
*ntype
; /* New type */
503 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
505 ntype
= alloc_type_copy (type
);
509 else /* We have storage, but need to reset it. */
515 TYPE_TARGET_TYPE (ntype
) = type
;
517 TYPE_LENGTH (ntype
) = 1;
518 ntype
->set_code (TYPE_CODE_FUNC
);
520 INIT_FUNC_SPECIFIC (ntype
);
525 /* Given a type TYPE, return a type of functions that return that type.
526 May need to construct such a type if this is the first use. */
529 lookup_function_type (struct type
*type
)
531 return make_function_type (type
, (struct type
**) 0);
534 /* Given a type TYPE and argument types, return the appropriate
535 function type. If the final type in PARAM_TYPES is NULL, make a
539 lookup_function_type_with_arguments (struct type
*type
,
541 struct type
**param_types
)
543 struct type
*fn
= make_function_type (type
, (struct type
**) 0);
548 if (param_types
[nparams
- 1] == NULL
)
551 TYPE_VARARGS (fn
) = 1;
553 else if (check_typedef (param_types
[nparams
- 1])->code ()
557 /* Caller should have ensured this. */
558 gdb_assert (nparams
== 0);
559 TYPE_PROTOTYPED (fn
) = 1;
562 TYPE_PROTOTYPED (fn
) = 1;
565 fn
->set_num_fields (nparams
);
567 = (struct field
*) TYPE_ZALLOC (fn
, nparams
* sizeof (struct field
));
568 for (i
= 0; i
< nparams
; ++i
)
569 TYPE_FIELD_TYPE (fn
, i
) = param_types
[i
];
574 /* Identify address space identifier by name --
575 return the integer flag defined in gdbtypes.h. */
578 address_space_name_to_int (struct gdbarch
*gdbarch
,
579 const char *space_identifier
)
583 /* Check for known address space delimiters. */
584 if (!strcmp (space_identifier
, "code"))
585 return TYPE_INSTANCE_FLAG_CODE_SPACE
;
586 else if (!strcmp (space_identifier
, "data"))
587 return TYPE_INSTANCE_FLAG_DATA_SPACE
;
588 else if (gdbarch_address_class_name_to_type_flags_p (gdbarch
)
589 && gdbarch_address_class_name_to_type_flags (gdbarch
,
594 error (_("Unknown address space specifier: \"%s\""), space_identifier
);
597 /* Identify address space identifier by integer flag as defined in
598 gdbtypes.h -- return the string version of the adress space name. */
601 address_space_int_to_name (struct gdbarch
*gdbarch
, int space_flag
)
603 if (space_flag
& TYPE_INSTANCE_FLAG_CODE_SPACE
)
605 else if (space_flag
& TYPE_INSTANCE_FLAG_DATA_SPACE
)
607 else if ((space_flag
& TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
608 && gdbarch_address_class_type_flags_to_name_p (gdbarch
))
609 return gdbarch_address_class_type_flags_to_name (gdbarch
, space_flag
);
614 /* Create a new type with instance flags NEW_FLAGS, based on TYPE.
616 If STORAGE is non-NULL, create the new type instance there.
617 STORAGE must be in the same obstack as TYPE. */
620 make_qualified_type (struct type
*type
, int new_flags
,
621 struct type
*storage
)
628 if (TYPE_INSTANCE_FLAGS (ntype
) == new_flags
)
630 ntype
= TYPE_CHAIN (ntype
);
632 while (ntype
!= type
);
634 /* Create a new type instance. */
636 ntype
= alloc_type_instance (type
);
639 /* If STORAGE was provided, it had better be in the same objfile
640 as TYPE. Otherwise, we can't link it into TYPE's cv chain:
641 if one objfile is freed and the other kept, we'd have
642 dangling pointers. */
643 gdb_assert (TYPE_OBJFILE (type
) == TYPE_OBJFILE (storage
));
646 TYPE_MAIN_TYPE (ntype
) = TYPE_MAIN_TYPE (type
);
647 TYPE_CHAIN (ntype
) = ntype
;
650 /* Pointers or references to the original type are not relevant to
652 TYPE_POINTER_TYPE (ntype
) = (struct type
*) 0;
653 TYPE_REFERENCE_TYPE (ntype
) = (struct type
*) 0;
655 /* Chain the new qualified type to the old type. */
656 TYPE_CHAIN (ntype
) = TYPE_CHAIN (type
);
657 TYPE_CHAIN (type
) = ntype
;
659 /* Now set the instance flags and return the new type. */
660 TYPE_INSTANCE_FLAGS (ntype
) = new_flags
;
662 /* Set length of new type to that of the original type. */
663 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
668 /* Make an address-space-delimited variant of a type -- a type that
669 is identical to the one supplied except that it has an address
670 space attribute attached to it (such as "code" or "data").
672 The space attributes "code" and "data" are for Harvard
673 architectures. The address space attributes are for architectures
674 which have alternately sized pointers or pointers with alternate
678 make_type_with_address_space (struct type
*type
, int space_flag
)
680 int new_flags
= ((TYPE_INSTANCE_FLAGS (type
)
681 & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
682 | TYPE_INSTANCE_FLAG_DATA_SPACE
683 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
))
686 return make_qualified_type (type
, new_flags
, NULL
);
689 /* Make a "c-v" variant of a type -- a type that is identical to the
690 one supplied except that it may have const or volatile attributes
691 CNST is a flag for setting the const attribute
692 VOLTL is a flag for setting the volatile attribute
693 TYPE is the base type whose variant we are creating.
695 If TYPEPTR and *TYPEPTR are non-zero, then *TYPEPTR points to
696 storage to hold the new qualified type; *TYPEPTR and TYPE must be
697 in the same objfile. Otherwise, allocate fresh memory for the new
698 type whereever TYPE lives. If TYPEPTR is non-zero, set it to the
699 new type we construct. */
702 make_cv_type (int cnst
, int voltl
,
704 struct type
**typeptr
)
706 struct type
*ntype
; /* New type */
708 int new_flags
= (TYPE_INSTANCE_FLAGS (type
)
709 & ~(TYPE_INSTANCE_FLAG_CONST
710 | TYPE_INSTANCE_FLAG_VOLATILE
));
713 new_flags
|= TYPE_INSTANCE_FLAG_CONST
;
716 new_flags
|= TYPE_INSTANCE_FLAG_VOLATILE
;
718 if (typeptr
&& *typeptr
!= NULL
)
720 /* TYPE and *TYPEPTR must be in the same objfile. We can't have
721 a C-V variant chain that threads across objfiles: if one
722 objfile gets freed, then the other has a broken C-V chain.
724 This code used to try to copy over the main type from TYPE to
725 *TYPEPTR if they were in different objfiles, but that's
726 wrong, too: TYPE may have a field list or member function
727 lists, which refer to types of their own, etc. etc. The
728 whole shebang would need to be copied over recursively; you
729 can't have inter-objfile pointers. The only thing to do is
730 to leave stub types as stub types, and look them up afresh by
731 name each time you encounter them. */
732 gdb_assert (TYPE_OBJFILE (*typeptr
) == TYPE_OBJFILE (type
));
735 ntype
= make_qualified_type (type
, new_flags
,
736 typeptr
? *typeptr
: NULL
);
744 /* Make a 'restrict'-qualified version of TYPE. */
747 make_restrict_type (struct type
*type
)
749 return make_qualified_type (type
,
750 (TYPE_INSTANCE_FLAGS (type
)
751 | TYPE_INSTANCE_FLAG_RESTRICT
),
755 /* Make a type without const, volatile, or restrict. */
758 make_unqualified_type (struct type
*type
)
760 return make_qualified_type (type
,
761 (TYPE_INSTANCE_FLAGS (type
)
762 & ~(TYPE_INSTANCE_FLAG_CONST
763 | TYPE_INSTANCE_FLAG_VOLATILE
764 | TYPE_INSTANCE_FLAG_RESTRICT
)),
768 /* Make a '_Atomic'-qualified version of TYPE. */
771 make_atomic_type (struct type
*type
)
773 return make_qualified_type (type
,
774 (TYPE_INSTANCE_FLAGS (type
)
775 | TYPE_INSTANCE_FLAG_ATOMIC
),
779 /* Replace the contents of ntype with the type *type. This changes the
780 contents, rather than the pointer for TYPE_MAIN_TYPE (ntype); thus
781 the changes are propogated to all types in the TYPE_CHAIN.
783 In order to build recursive types, it's inevitable that we'll need
784 to update types in place --- but this sort of indiscriminate
785 smashing is ugly, and needs to be replaced with something more
786 controlled. TYPE_MAIN_TYPE is a step in this direction; it's not
787 clear if more steps are needed. */
790 replace_type (struct type
*ntype
, struct type
*type
)
794 /* These two types had better be in the same objfile. Otherwise,
795 the assignment of one type's main type structure to the other
796 will produce a type with references to objects (names; field
797 lists; etc.) allocated on an objfile other than its own. */
798 gdb_assert (TYPE_OBJFILE (ntype
) == TYPE_OBJFILE (type
));
800 *TYPE_MAIN_TYPE (ntype
) = *TYPE_MAIN_TYPE (type
);
802 /* The type length is not a part of the main type. Update it for
803 each type on the variant chain. */
807 /* Assert that this element of the chain has no address-class bits
808 set in its flags. Such type variants might have type lengths
809 which are supposed to be different from the non-address-class
810 variants. This assertion shouldn't ever be triggered because
811 symbol readers which do construct address-class variants don't
812 call replace_type(). */
813 gdb_assert (TYPE_ADDRESS_CLASS_ALL (chain
) == 0);
815 TYPE_LENGTH (chain
) = TYPE_LENGTH (type
);
816 chain
= TYPE_CHAIN (chain
);
818 while (ntype
!= chain
);
820 /* Assert that the two types have equivalent instance qualifiers.
821 This should be true for at least all of our debug readers. */
822 gdb_assert (TYPE_INSTANCE_FLAGS (ntype
) == TYPE_INSTANCE_FLAGS (type
));
825 /* Implement direct support for MEMBER_TYPE in GNU C++.
826 May need to construct such a type if this is the first use.
827 The TYPE is the type of the member. The DOMAIN is the type
828 of the aggregate that the member belongs to. */
831 lookup_memberptr_type (struct type
*type
, struct type
*domain
)
835 mtype
= alloc_type_copy (type
);
836 smash_to_memberptr_type (mtype
, domain
, type
);
840 /* Return a pointer-to-method type, for a method of type TO_TYPE. */
843 lookup_methodptr_type (struct type
*to_type
)
847 mtype
= alloc_type_copy (to_type
);
848 smash_to_methodptr_type (mtype
, to_type
);
852 /* Allocate a stub method whose return type is TYPE. This apparently
853 happens for speed of symbol reading, since parsing out the
854 arguments to the method is cpu-intensive, the way we are doing it.
855 So, we will fill in arguments later. This always returns a fresh
859 allocate_stub_method (struct type
*type
)
863 mtype
= alloc_type_copy (type
);
864 mtype
->set_code (TYPE_CODE_METHOD
);
865 TYPE_LENGTH (mtype
) = 1;
866 TYPE_STUB (mtype
) = 1;
867 TYPE_TARGET_TYPE (mtype
) = type
;
868 /* TYPE_SELF_TYPE (mtype) = unknown yet */
872 /* See gdbtypes.h. */
875 operator== (const dynamic_prop
&l
, const dynamic_prop
&r
)
877 if (l
.kind
!= r
.kind
)
885 return l
.data
.const_val
== r
.data
.const_val
;
886 case PROP_ADDR_OFFSET
:
889 return l
.data
.baton
== r
.data
.baton
;
890 case PROP_VARIANT_PARTS
:
891 return l
.data
.variant_parts
== r
.data
.variant_parts
;
893 return l
.data
.original_type
== r
.data
.original_type
;
896 gdb_assert_not_reached ("unhandled dynamic_prop kind");
899 /* See gdbtypes.h. */
902 operator== (const range_bounds
&l
, const range_bounds
&r
)
904 #define FIELD_EQ(FIELD) (l.FIELD == r.FIELD)
906 return (FIELD_EQ (low
)
908 && FIELD_EQ (flag_upper_bound_is_count
)
909 && FIELD_EQ (flag_bound_evaluated
)
915 /* Create a range type with a dynamic range from LOW_BOUND to
916 HIGH_BOUND, inclusive. See create_range_type for further details. */
919 create_range_type (struct type
*result_type
, struct type
*index_type
,
920 const struct dynamic_prop
*low_bound
,
921 const struct dynamic_prop
*high_bound
,
924 /* The INDEX_TYPE should be a type capable of holding the upper and lower
925 bounds, as such a zero sized, or void type makes no sense. */
926 gdb_assert (index_type
->code () != TYPE_CODE_VOID
);
927 gdb_assert (TYPE_LENGTH (index_type
) > 0);
929 if (result_type
== NULL
)
930 result_type
= alloc_type_copy (index_type
);
931 result_type
->set_code (TYPE_CODE_RANGE
);
932 TYPE_TARGET_TYPE (result_type
) = index_type
;
933 if (TYPE_STUB (index_type
))
934 TYPE_TARGET_STUB (result_type
) = 1;
936 TYPE_LENGTH (result_type
) = TYPE_LENGTH (check_typedef (index_type
));
938 TYPE_RANGE_DATA (result_type
) = (struct range_bounds
*)
939 TYPE_ZALLOC (result_type
, sizeof (struct range_bounds
));
940 TYPE_RANGE_DATA (result_type
)->low
= *low_bound
;
941 TYPE_RANGE_DATA (result_type
)->high
= *high_bound
;
942 TYPE_RANGE_DATA (result_type
)->bias
= bias
;
944 /* Initialize the stride to be a constant, the value will already be zero
945 thanks to the use of TYPE_ZALLOC above. */
946 TYPE_RANGE_DATA (result_type
)->stride
.kind
= PROP_CONST
;
948 if (low_bound
->kind
== PROP_CONST
&& low_bound
->data
.const_val
>= 0)
949 TYPE_UNSIGNED (result_type
) = 1;
951 /* Ada allows the declaration of range types whose upper bound is
952 less than the lower bound, so checking the lower bound is not
953 enough. Make sure we do not mark a range type whose upper bound
954 is negative as unsigned. */
955 if (high_bound
->kind
== PROP_CONST
&& high_bound
->data
.const_val
< 0)
956 TYPE_UNSIGNED (result_type
) = 0;
958 TYPE_ENDIANITY_NOT_DEFAULT (result_type
)
959 = TYPE_ENDIANITY_NOT_DEFAULT (index_type
);
964 /* See gdbtypes.h. */
967 create_range_type_with_stride (struct type
*result_type
,
968 struct type
*index_type
,
969 const struct dynamic_prop
*low_bound
,
970 const struct dynamic_prop
*high_bound
,
972 const struct dynamic_prop
*stride
,
975 result_type
= create_range_type (result_type
, index_type
, low_bound
,
978 gdb_assert (stride
!= nullptr);
979 TYPE_RANGE_DATA (result_type
)->stride
= *stride
;
980 TYPE_RANGE_DATA (result_type
)->flag_is_byte_stride
= byte_stride_p
;
987 /* Create a range type using either a blank type supplied in
988 RESULT_TYPE, or creating a new type, inheriting the objfile from
991 Indices will be of type INDEX_TYPE, and will range from LOW_BOUND
992 to HIGH_BOUND, inclusive.
994 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
995 sure it is TYPE_CODE_UNDEF before we bash it into a range type? */
998 create_static_range_type (struct type
*result_type
, struct type
*index_type
,
999 LONGEST low_bound
, LONGEST high_bound
)
1001 struct dynamic_prop low
, high
;
1003 low
.kind
= PROP_CONST
;
1004 low
.data
.const_val
= low_bound
;
1006 high
.kind
= PROP_CONST
;
1007 high
.data
.const_val
= high_bound
;
1009 result_type
= create_range_type (result_type
, index_type
, &low
, &high
, 0);
1014 /* Predicate tests whether BOUNDS are static. Returns 1 if all bounds values
1015 are static, otherwise returns 0. */
1018 has_static_range (const struct range_bounds
*bounds
)
1020 /* If the range doesn't have a defined stride then its stride field will
1021 be initialized to the constant 0. */
1022 return (bounds
->low
.kind
== PROP_CONST
1023 && bounds
->high
.kind
== PROP_CONST
1024 && bounds
->stride
.kind
== PROP_CONST
);
1028 /* Set *LOWP and *HIGHP to the lower and upper bounds of discrete type
1029 TYPE. Return 1 if type is a range type, 0 if it is discrete (and
1030 bounds will fit in LONGEST), or -1 otherwise. */
1033 get_discrete_bounds (struct type
*type
, LONGEST
*lowp
, LONGEST
*highp
)
1035 type
= check_typedef (type
);
1036 switch (type
->code ())
1038 case TYPE_CODE_RANGE
:
1039 *lowp
= TYPE_LOW_BOUND (type
);
1040 *highp
= TYPE_HIGH_BOUND (type
);
1042 case TYPE_CODE_ENUM
:
1043 if (TYPE_NFIELDS (type
) > 0)
1045 /* The enums may not be sorted by value, so search all
1049 *lowp
= *highp
= TYPE_FIELD_ENUMVAL (type
, 0);
1050 for (i
= 0; i
< TYPE_NFIELDS (type
); i
++)
1052 if (TYPE_FIELD_ENUMVAL (type
, i
) < *lowp
)
1053 *lowp
= TYPE_FIELD_ENUMVAL (type
, i
);
1054 if (TYPE_FIELD_ENUMVAL (type
, i
) > *highp
)
1055 *highp
= TYPE_FIELD_ENUMVAL (type
, i
);
1058 /* Set unsigned indicator if warranted. */
1061 TYPE_UNSIGNED (type
) = 1;
1070 case TYPE_CODE_BOOL
:
1075 if (TYPE_LENGTH (type
) > sizeof (LONGEST
)) /* Too big */
1077 if (!TYPE_UNSIGNED (type
))
1079 *lowp
= -(1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1));
1080 *highp
= -*lowp
- 1;
1084 case TYPE_CODE_CHAR
:
1086 /* This round-about calculation is to avoid shifting by
1087 TYPE_LENGTH (type) * TARGET_CHAR_BIT, which will not work
1088 if TYPE_LENGTH (type) == sizeof (LONGEST). */
1089 *highp
= 1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1);
1090 *highp
= (*highp
- 1) | *highp
;
1097 /* Assuming TYPE is a simple, non-empty array type, compute its upper
1098 and lower bound. Save the low bound into LOW_BOUND if not NULL.
1099 Save the high bound into HIGH_BOUND if not NULL.
1101 Return 1 if the operation was successful. Return zero otherwise,
1102 in which case the values of LOW_BOUND and HIGH_BOUNDS are unmodified.
1104 We now simply use get_discrete_bounds call to get the values
1105 of the low and high bounds.
1106 get_discrete_bounds can return three values:
1107 1, meaning that index is a range,
1108 0, meaning that index is a discrete type,
1109 or -1 for failure. */
1112 get_array_bounds (struct type
*type
, LONGEST
*low_bound
, LONGEST
*high_bound
)
1114 struct type
*index
= TYPE_INDEX_TYPE (type
);
1122 res
= get_discrete_bounds (index
, &low
, &high
);
1126 /* Check if the array bounds are undefined. */
1128 && ((low_bound
&& TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type
))
1129 || (high_bound
&& TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type
))))
1141 /* Assuming that TYPE is a discrete type and VAL is a valid integer
1142 representation of a value of this type, save the corresponding
1143 position number in POS.
1145 Its differs from VAL only in the case of enumeration types. In
1146 this case, the position number of the value of the first listed
1147 enumeration literal is zero; the position number of the value of
1148 each subsequent enumeration literal is one more than that of its
1149 predecessor in the list.
1151 Return 1 if the operation was successful. Return zero otherwise,
1152 in which case the value of POS is unmodified.
1156 discrete_position (struct type
*type
, LONGEST val
, LONGEST
*pos
)
1158 if (type
->code () == TYPE_CODE_ENUM
)
1162 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
1164 if (val
== TYPE_FIELD_ENUMVAL (type
, i
))
1170 /* Invalid enumeration value. */
1180 /* If the array TYPE has static bounds calculate and update its
1181 size, then return true. Otherwise return false and leave TYPE
1185 update_static_array_size (struct type
*type
)
1187 gdb_assert (type
->code () == TYPE_CODE_ARRAY
);
1189 struct type
*range_type
= TYPE_INDEX_TYPE (type
);
1191 if (type
->dyn_prop (DYN_PROP_BYTE_STRIDE
) == nullptr
1192 && has_static_range (TYPE_RANGE_DATA (range_type
))
1193 && (!type_not_associated (type
)
1194 && !type_not_allocated (type
)))
1196 LONGEST low_bound
, high_bound
;
1198 struct type
*element_type
;
1200 /* If the array itself doesn't provide a stride value then take
1201 whatever stride the range provides. Don't update BIT_STRIDE as
1202 we don't want to place the stride value from the range into this
1203 arrays bit size field. */
1204 stride
= TYPE_FIELD_BITSIZE (type
, 0);
1206 stride
= TYPE_BIT_STRIDE (range_type
);
1208 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
1209 low_bound
= high_bound
= 0;
1210 element_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1211 /* Be careful when setting the array length. Ada arrays can be
1212 empty arrays with the high_bound being smaller than the low_bound.
1213 In such cases, the array length should be zero. */
1214 if (high_bound
< low_bound
)
1215 TYPE_LENGTH (type
) = 0;
1216 else if (stride
!= 0)
1218 /* Ensure that the type length is always positive, even in the
1219 case where (for example in Fortran) we have a negative
1220 stride. It is possible to have a single element array with a
1221 negative stride in Fortran (this doesn't mean anything
1222 special, it's still just a single element array) so do
1223 consider that case when touching this code. */
1224 LONGEST element_count
= std::abs (high_bound
- low_bound
+ 1);
1226 = ((std::abs (stride
) * element_count
) + 7) / 8;
1229 TYPE_LENGTH (type
) =
1230 TYPE_LENGTH (element_type
) * (high_bound
- low_bound
+ 1);
1238 /* Create an array type using either a blank type supplied in
1239 RESULT_TYPE, or creating a new type, inheriting the objfile from
1242 Elements will be of type ELEMENT_TYPE, the indices will be of type
1245 BYTE_STRIDE_PROP, when not NULL, provides the array's byte stride.
1246 This byte stride property is added to the resulting array type
1247 as a DYN_PROP_BYTE_STRIDE. As a consequence, the BYTE_STRIDE_PROP
1248 argument can only be used to create types that are objfile-owned
1249 (see add_dyn_prop), meaning that either this function must be called
1250 with an objfile-owned RESULT_TYPE, or an objfile-owned RANGE_TYPE.
1252 BIT_STRIDE is taken into account only when BYTE_STRIDE_PROP is NULL.
1253 If BIT_STRIDE is not zero, build a packed array type whose element
1254 size is BIT_STRIDE. Otherwise, ignore this parameter.
1256 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1257 sure it is TYPE_CODE_UNDEF before we bash it into an array
1261 create_array_type_with_stride (struct type
*result_type
,
1262 struct type
*element_type
,
1263 struct type
*range_type
,
1264 struct dynamic_prop
*byte_stride_prop
,
1265 unsigned int bit_stride
)
1267 if (byte_stride_prop
!= NULL
1268 && byte_stride_prop
->kind
== PROP_CONST
)
1270 /* The byte stride is actually not dynamic. Pretend we were
1271 called with bit_stride set instead of byte_stride_prop.
1272 This will give us the same result type, while avoiding
1273 the need to handle this as a special case. */
1274 bit_stride
= byte_stride_prop
->data
.const_val
* 8;
1275 byte_stride_prop
= NULL
;
1278 if (result_type
== NULL
)
1279 result_type
= alloc_type_copy (range_type
);
1281 result_type
->set_code (TYPE_CODE_ARRAY
);
1282 TYPE_TARGET_TYPE (result_type
) = element_type
;
1284 result_type
->set_num_fields (1);
1285 TYPE_FIELDS (result_type
) =
1286 (struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
));
1287 TYPE_INDEX_TYPE (result_type
) = range_type
;
1288 if (byte_stride_prop
!= NULL
)
1289 result_type
->add_dyn_prop (DYN_PROP_BYTE_STRIDE
, *byte_stride_prop
);
1290 else if (bit_stride
> 0)
1291 TYPE_FIELD_BITSIZE (result_type
, 0) = bit_stride
;
1293 if (!update_static_array_size (result_type
))
1295 /* This type is dynamic and its length needs to be computed
1296 on demand. In the meantime, avoid leaving the TYPE_LENGTH
1297 undefined by setting it to zero. Although we are not expected
1298 to trust TYPE_LENGTH in this case, setting the size to zero
1299 allows us to avoid allocating objects of random sizes in case
1300 we accidently do. */
1301 TYPE_LENGTH (result_type
) = 0;
1304 /* TYPE_TARGET_STUB will take care of zero length arrays. */
1305 if (TYPE_LENGTH (result_type
) == 0)
1306 TYPE_TARGET_STUB (result_type
) = 1;
1311 /* Same as create_array_type_with_stride but with no bit_stride
1312 (BIT_STRIDE = 0), thus building an unpacked array. */
1315 create_array_type (struct type
*result_type
,
1316 struct type
*element_type
,
1317 struct type
*range_type
)
1319 return create_array_type_with_stride (result_type
, element_type
,
1320 range_type
, NULL
, 0);
1324 lookup_array_range_type (struct type
*element_type
,
1325 LONGEST low_bound
, LONGEST high_bound
)
1327 struct type
*index_type
;
1328 struct type
*range_type
;
1330 if (TYPE_OBJFILE_OWNED (element_type
))
1331 index_type
= objfile_type (TYPE_OWNER (element_type
).objfile
)->builtin_int
;
1333 index_type
= builtin_type (get_type_arch (element_type
))->builtin_int
;
1334 range_type
= create_static_range_type (NULL
, index_type
,
1335 low_bound
, high_bound
);
1337 return create_array_type (NULL
, element_type
, range_type
);
1340 /* Create a string type using either a blank type supplied in
1341 RESULT_TYPE, or creating a new type. String types are similar
1342 enough to array of char types that we can use create_array_type to
1343 build the basic type and then bash it into a string type.
1345 For fixed length strings, the range type contains 0 as the lower
1346 bound and the length of the string minus one as the upper bound.
1348 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1349 sure it is TYPE_CODE_UNDEF before we bash it into a string
1353 create_string_type (struct type
*result_type
,
1354 struct type
*string_char_type
,
1355 struct type
*range_type
)
1357 result_type
= create_array_type (result_type
,
1360 result_type
->set_code (TYPE_CODE_STRING
);
1365 lookup_string_range_type (struct type
*string_char_type
,
1366 LONGEST low_bound
, LONGEST high_bound
)
1368 struct type
*result_type
;
1370 result_type
= lookup_array_range_type (string_char_type
,
1371 low_bound
, high_bound
);
1372 result_type
->set_code (TYPE_CODE_STRING
);
1377 create_set_type (struct type
*result_type
, struct type
*domain_type
)
1379 if (result_type
== NULL
)
1380 result_type
= alloc_type_copy (domain_type
);
1382 result_type
->set_code (TYPE_CODE_SET
);
1383 result_type
->set_num_fields (1);
1384 TYPE_FIELDS (result_type
)
1385 = (struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
));
1387 if (!TYPE_STUB (domain_type
))
1389 LONGEST low_bound
, high_bound
, bit_length
;
1391 if (get_discrete_bounds (domain_type
, &low_bound
, &high_bound
) < 0)
1392 low_bound
= high_bound
= 0;
1393 bit_length
= high_bound
- low_bound
+ 1;
1394 TYPE_LENGTH (result_type
)
1395 = (bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1397 TYPE_UNSIGNED (result_type
) = 1;
1399 TYPE_FIELD_TYPE (result_type
, 0) = domain_type
;
1404 /* Convert ARRAY_TYPE to a vector type. This may modify ARRAY_TYPE
1405 and any array types nested inside it. */
1408 make_vector_type (struct type
*array_type
)
1410 struct type
*inner_array
, *elt_type
;
1413 /* Find the innermost array type, in case the array is
1414 multi-dimensional. */
1415 inner_array
= array_type
;
1416 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
1417 inner_array
= TYPE_TARGET_TYPE (inner_array
);
1419 elt_type
= TYPE_TARGET_TYPE (inner_array
);
1420 if (elt_type
->code () == TYPE_CODE_INT
)
1422 flags
= TYPE_INSTANCE_FLAGS (elt_type
) | TYPE_INSTANCE_FLAG_NOTTEXT
;
1423 elt_type
= make_qualified_type (elt_type
, flags
, NULL
);
1424 TYPE_TARGET_TYPE (inner_array
) = elt_type
;
1427 TYPE_VECTOR (array_type
) = 1;
1431 init_vector_type (struct type
*elt_type
, int n
)
1433 struct type
*array_type
;
1435 array_type
= lookup_array_range_type (elt_type
, 0, n
- 1);
1436 make_vector_type (array_type
);
1440 /* Internal routine called by TYPE_SELF_TYPE to return the type that TYPE
1441 belongs to. In c++ this is the class of "this", but TYPE_THIS_TYPE is too
1442 confusing. "self" is a common enough replacement for "this".
1443 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1444 TYPE_CODE_METHOD. */
1447 internal_type_self_type (struct type
*type
)
1449 switch (type
->code ())
1451 case TYPE_CODE_METHODPTR
:
1452 case TYPE_CODE_MEMBERPTR
:
1453 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1455 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1456 return TYPE_MAIN_TYPE (type
)->type_specific
.self_type
;
1457 case TYPE_CODE_METHOD
:
1458 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1460 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1461 return TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
;
1463 gdb_assert_not_reached ("bad type");
1467 /* Set the type of the class that TYPE belongs to.
1468 In c++ this is the class of "this".
1469 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1470 TYPE_CODE_METHOD. */
1473 set_type_self_type (struct type
*type
, struct type
*self_type
)
1475 switch (type
->code ())
1477 case TYPE_CODE_METHODPTR
:
1478 case TYPE_CODE_MEMBERPTR
:
1479 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1480 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_SELF_TYPE
;
1481 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1482 TYPE_MAIN_TYPE (type
)->type_specific
.self_type
= self_type
;
1484 case TYPE_CODE_METHOD
:
1485 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1486 INIT_FUNC_SPECIFIC (type
);
1487 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1488 TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
= self_type
;
1491 gdb_assert_not_reached ("bad type");
1495 /* Smash TYPE to be a type of pointers to members of SELF_TYPE with type
1496 TO_TYPE. A member pointer is a wierd thing -- it amounts to a
1497 typed offset into a struct, e.g. "an int at offset 8". A MEMBER
1498 TYPE doesn't include the offset (that's the value of the MEMBER
1499 itself), but does include the structure type into which it points
1502 When "smashing" the type, we preserve the objfile that the old type
1503 pointed to, since we aren't changing where the type is actually
1507 smash_to_memberptr_type (struct type
*type
, struct type
*self_type
,
1508 struct type
*to_type
)
1511 type
->set_code (TYPE_CODE_MEMBERPTR
);
1512 TYPE_TARGET_TYPE (type
) = to_type
;
1513 set_type_self_type (type
, self_type
);
1514 /* Assume that a data member pointer is the same size as a normal
1517 = gdbarch_ptr_bit (get_type_arch (to_type
)) / TARGET_CHAR_BIT
;
1520 /* Smash TYPE to be a type of pointer to methods type TO_TYPE.
1522 When "smashing" the type, we preserve the objfile that the old type
1523 pointed to, since we aren't changing where the type is actually
1527 smash_to_methodptr_type (struct type
*type
, struct type
*to_type
)
1530 type
->set_code (TYPE_CODE_METHODPTR
);
1531 TYPE_TARGET_TYPE (type
) = to_type
;
1532 set_type_self_type (type
, TYPE_SELF_TYPE (to_type
));
1533 TYPE_LENGTH (type
) = cplus_method_ptr_size (to_type
);
1536 /* Smash TYPE to be a type of method of SELF_TYPE with type TO_TYPE.
1537 METHOD just means `function that gets an extra "this" argument'.
1539 When "smashing" the type, we preserve the objfile that the old type
1540 pointed to, since we aren't changing where the type is actually
1544 smash_to_method_type (struct type
*type
, struct type
*self_type
,
1545 struct type
*to_type
, struct field
*args
,
1546 int nargs
, int varargs
)
1549 type
->set_code (TYPE_CODE_METHOD
);
1550 TYPE_TARGET_TYPE (type
) = to_type
;
1551 set_type_self_type (type
, self_type
);
1552 TYPE_FIELDS (type
) = args
;
1553 type
->set_num_fields (nargs
);
1555 TYPE_VARARGS (type
) = 1;
1556 TYPE_LENGTH (type
) = 1; /* In practice, this is never needed. */
1559 /* A wrapper of TYPE_NAME which calls error if the type is anonymous.
1560 Since GCC PR debug/47510 DWARF provides associated information to detect the
1561 anonymous class linkage name from its typedef.
1563 Parameter TYPE should not yet have CHECK_TYPEDEF applied, this function will
1567 type_name_or_error (struct type
*type
)
1569 struct type
*saved_type
= type
;
1571 struct objfile
*objfile
;
1573 type
= check_typedef (type
);
1575 name
= type
->name ();
1579 name
= saved_type
->name ();
1580 objfile
= TYPE_OBJFILE (saved_type
);
1581 error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
1582 name
? name
: "<anonymous>",
1583 objfile
? objfile_name (objfile
) : "<arch>");
1586 /* Lookup a typedef or primitive type named NAME, visible in lexical
1587 block BLOCK. If NOERR is nonzero, return zero if NAME is not
1588 suitably defined. */
1591 lookup_typename (const struct language_defn
*language
,
1593 const struct block
*block
, int noerr
)
1597 sym
= lookup_symbol_in_language (name
, block
, VAR_DOMAIN
,
1598 language
->la_language
, NULL
).symbol
;
1599 if (sym
!= NULL
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
1600 return SYMBOL_TYPE (sym
);
1604 error (_("No type named %s."), name
);
1608 lookup_unsigned_typename (const struct language_defn
*language
,
1611 char *uns
= (char *) alloca (strlen (name
) + 10);
1613 strcpy (uns
, "unsigned ");
1614 strcpy (uns
+ 9, name
);
1615 return lookup_typename (language
, uns
, NULL
, 0);
1619 lookup_signed_typename (const struct language_defn
*language
, const char *name
)
1622 char *uns
= (char *) alloca (strlen (name
) + 8);
1624 strcpy (uns
, "signed ");
1625 strcpy (uns
+ 7, name
);
1626 t
= lookup_typename (language
, uns
, NULL
, 1);
1627 /* If we don't find "signed FOO" just try again with plain "FOO". */
1630 return lookup_typename (language
, name
, NULL
, 0);
1633 /* Lookup a structure type named "struct NAME",
1634 visible in lexical block BLOCK. */
1637 lookup_struct (const char *name
, const struct block
*block
)
1641 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1645 error (_("No struct type named %s."), name
);
1647 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_STRUCT
)
1649 error (_("This context has class, union or enum %s, not a struct."),
1652 return (SYMBOL_TYPE (sym
));
1655 /* Lookup a union type named "union NAME",
1656 visible in lexical block BLOCK. */
1659 lookup_union (const char *name
, const struct block
*block
)
1664 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1667 error (_("No union type named %s."), name
);
1669 t
= SYMBOL_TYPE (sym
);
1671 if (t
->code () == TYPE_CODE_UNION
)
1674 /* If we get here, it's not a union. */
1675 error (_("This context has class, struct or enum %s, not a union."),
1679 /* Lookup an enum type named "enum NAME",
1680 visible in lexical block BLOCK. */
1683 lookup_enum (const char *name
, const struct block
*block
)
1687 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1690 error (_("No enum type named %s."), name
);
1692 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_ENUM
)
1694 error (_("This context has class, struct or union %s, not an enum."),
1697 return (SYMBOL_TYPE (sym
));
1700 /* Lookup a template type named "template NAME<TYPE>",
1701 visible in lexical block BLOCK. */
1704 lookup_template_type (const char *name
, struct type
*type
,
1705 const struct block
*block
)
1708 char *nam
= (char *)
1709 alloca (strlen (name
) + strlen (type
->name ()) + 4);
1713 strcat (nam
, type
->name ());
1714 strcat (nam
, " >"); /* FIXME, extra space still introduced in gcc? */
1716 sym
= lookup_symbol (nam
, block
, VAR_DOMAIN
, 0).symbol
;
1720 error (_("No template type named %s."), name
);
1722 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_STRUCT
)
1724 error (_("This context has class, union or enum %s, not a struct."),
1727 return (SYMBOL_TYPE (sym
));
1730 /* See gdbtypes.h. */
1733 lookup_struct_elt (struct type
*type
, const char *name
, int noerr
)
1739 type
= check_typedef (type
);
1740 if (type
->code () != TYPE_CODE_PTR
1741 && type
->code () != TYPE_CODE_REF
)
1743 type
= TYPE_TARGET_TYPE (type
);
1746 if (type
->code () != TYPE_CODE_STRUCT
1747 && type
->code () != TYPE_CODE_UNION
)
1749 std::string type_name
= type_to_string (type
);
1750 error (_("Type %s is not a structure or union type."),
1751 type_name
.c_str ());
1754 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1756 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1758 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1760 return {&TYPE_FIELD (type
, i
), TYPE_FIELD_BITPOS (type
, i
)};
1762 else if (!t_field_name
|| *t_field_name
== '\0')
1765 = lookup_struct_elt (TYPE_FIELD_TYPE (type
, i
), name
, 1);
1766 if (elt
.field
!= NULL
)
1768 elt
.offset
+= TYPE_FIELD_BITPOS (type
, i
);
1774 /* OK, it's not in this class. Recursively check the baseclasses. */
1775 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1777 struct_elt elt
= lookup_struct_elt (TYPE_BASECLASS (type
, i
), name
, 1);
1778 if (elt
.field
!= NULL
)
1783 return {nullptr, 0};
1785 std::string type_name
= type_to_string (type
);
1786 error (_("Type %s has no component named %s."), type_name
.c_str (), name
);
1789 /* See gdbtypes.h. */
1792 lookup_struct_elt_type (struct type
*type
, const char *name
, int noerr
)
1794 struct_elt elt
= lookup_struct_elt (type
, name
, noerr
);
1795 if (elt
.field
!= NULL
)
1796 return FIELD_TYPE (*elt
.field
);
1801 /* Store in *MAX the largest number representable by unsigned integer type
1805 get_unsigned_type_max (struct type
*type
, ULONGEST
*max
)
1809 type
= check_typedef (type
);
1810 gdb_assert (type
->code () == TYPE_CODE_INT
&& TYPE_UNSIGNED (type
));
1811 gdb_assert (TYPE_LENGTH (type
) <= sizeof (ULONGEST
));
1813 /* Written this way to avoid overflow. */
1814 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1815 *max
= ((((ULONGEST
) 1 << (n
- 1)) - 1) << 1) | 1;
1818 /* Store in *MIN, *MAX the smallest and largest numbers representable by
1819 signed integer type TYPE. */
1822 get_signed_type_minmax (struct type
*type
, LONGEST
*min
, LONGEST
*max
)
1826 type
= check_typedef (type
);
1827 gdb_assert (type
->code () == TYPE_CODE_INT
&& !TYPE_UNSIGNED (type
));
1828 gdb_assert (TYPE_LENGTH (type
) <= sizeof (LONGEST
));
1830 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1831 *min
= -((ULONGEST
) 1 << (n
- 1));
1832 *max
= ((ULONGEST
) 1 << (n
- 1)) - 1;
1835 /* Internal routine called by TYPE_VPTR_FIELDNO to return the value of
1836 cplus_stuff.vptr_fieldno.
1838 cplus_stuff is initialized to cplus_struct_default which does not
1839 set vptr_fieldno to -1 for portability reasons (IWBN to use C99
1840 designated initializers). We cope with that here. */
1843 internal_type_vptr_fieldno (struct type
*type
)
1845 type
= check_typedef (type
);
1846 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1847 || type
->code () == TYPE_CODE_UNION
);
1848 if (!HAVE_CPLUS_STRUCT (type
))
1850 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
;
1853 /* Set the value of cplus_stuff.vptr_fieldno. */
1856 set_type_vptr_fieldno (struct type
*type
, int fieldno
)
1858 type
= check_typedef (type
);
1859 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1860 || type
->code () == TYPE_CODE_UNION
);
1861 if (!HAVE_CPLUS_STRUCT (type
))
1862 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1863 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
= fieldno
;
1866 /* Internal routine called by TYPE_VPTR_BASETYPE to return the value of
1867 cplus_stuff.vptr_basetype. */
1870 internal_type_vptr_basetype (struct type
*type
)
1872 type
= check_typedef (type
);
1873 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1874 || type
->code () == TYPE_CODE_UNION
);
1875 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_CPLUS_STUFF
);
1876 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
;
1879 /* Set the value of cplus_stuff.vptr_basetype. */
1882 set_type_vptr_basetype (struct type
*type
, struct type
*basetype
)
1884 type
= check_typedef (type
);
1885 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1886 || type
->code () == TYPE_CODE_UNION
);
1887 if (!HAVE_CPLUS_STRUCT (type
))
1888 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1889 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
= basetype
;
1892 /* Lookup the vptr basetype/fieldno values for TYPE.
1893 If found store vptr_basetype in *BASETYPEP if non-NULL, and return
1894 vptr_fieldno. Also, if found and basetype is from the same objfile,
1896 If not found, return -1 and ignore BASETYPEP.
1897 Callers should be aware that in some cases (for example,
1898 the type or one of its baseclasses is a stub type and we are
1899 debugging a .o file, or the compiler uses DWARF-2 and is not GCC),
1900 this function will not be able to find the
1901 virtual function table pointer, and vptr_fieldno will remain -1 and
1902 vptr_basetype will remain NULL or incomplete. */
1905 get_vptr_fieldno (struct type
*type
, struct type
**basetypep
)
1907 type
= check_typedef (type
);
1909 if (TYPE_VPTR_FIELDNO (type
) < 0)
1913 /* We must start at zero in case the first (and only) baseclass
1914 is virtual (and hence we cannot share the table pointer). */
1915 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
1917 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
1919 struct type
*basetype
;
1921 fieldno
= get_vptr_fieldno (baseclass
, &basetype
);
1924 /* If the type comes from a different objfile we can't cache
1925 it, it may have a different lifetime. PR 2384 */
1926 if (TYPE_OBJFILE (type
) == TYPE_OBJFILE (basetype
))
1928 set_type_vptr_fieldno (type
, fieldno
);
1929 set_type_vptr_basetype (type
, basetype
);
1932 *basetypep
= basetype
;
1943 *basetypep
= TYPE_VPTR_BASETYPE (type
);
1944 return TYPE_VPTR_FIELDNO (type
);
1949 stub_noname_complaint (void)
1951 complaint (_("stub type has NULL name"));
1954 /* Return nonzero if TYPE has a DYN_PROP_BYTE_STRIDE dynamic property
1955 attached to it, and that property has a non-constant value. */
1958 array_type_has_dynamic_stride (struct type
*type
)
1960 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
1962 return (prop
!= NULL
&& prop
->kind
!= PROP_CONST
);
1965 /* Worker for is_dynamic_type. */
1968 is_dynamic_type_internal (struct type
*type
, int top_level
)
1970 type
= check_typedef (type
);
1972 /* We only want to recognize references at the outermost level. */
1973 if (top_level
&& type
->code () == TYPE_CODE_REF
)
1974 type
= check_typedef (TYPE_TARGET_TYPE (type
));
1976 /* Types that have a dynamic TYPE_DATA_LOCATION are considered
1977 dynamic, even if the type itself is statically defined.
1978 From a user's point of view, this may appear counter-intuitive;
1979 but it makes sense in this context, because the point is to determine
1980 whether any part of the type needs to be resolved before it can
1982 if (TYPE_DATA_LOCATION (type
) != NULL
1983 && (TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCEXPR
1984 || TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCLIST
))
1987 if (TYPE_ASSOCIATED_PROP (type
))
1990 if (TYPE_ALLOCATED_PROP (type
))
1993 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
1994 if (prop
!= nullptr && prop
->kind
!= PROP_TYPE
)
1997 if (TYPE_HAS_DYNAMIC_LENGTH (type
))
2000 switch (type
->code ())
2002 case TYPE_CODE_RANGE
:
2004 /* A range type is obviously dynamic if it has at least one
2005 dynamic bound. But also consider the range type to be
2006 dynamic when its subtype is dynamic, even if the bounds
2007 of the range type are static. It allows us to assume that
2008 the subtype of a static range type is also static. */
2009 return (!has_static_range (TYPE_RANGE_DATA (type
))
2010 || is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0));
2013 case TYPE_CODE_STRING
:
2014 /* Strings are very much like an array of characters, and can be
2015 treated as one here. */
2016 case TYPE_CODE_ARRAY
:
2018 gdb_assert (TYPE_NFIELDS (type
) == 1);
2020 /* The array is dynamic if either the bounds are dynamic... */
2021 if (is_dynamic_type_internal (TYPE_INDEX_TYPE (type
), 0))
2023 /* ... or the elements it contains have a dynamic contents... */
2024 if (is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0))
2026 /* ... or if it has a dynamic stride... */
2027 if (array_type_has_dynamic_stride (type
))
2032 case TYPE_CODE_STRUCT
:
2033 case TYPE_CODE_UNION
:
2037 bool is_cplus
= HAVE_CPLUS_STRUCT (type
);
2039 for (i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
2041 /* Static fields can be ignored here. */
2042 if (field_is_static (&TYPE_FIELD (type
, i
)))
2044 /* If the field has dynamic type, then so does TYPE. */
2045 if (is_dynamic_type_internal (TYPE_FIELD_TYPE (type
, i
), 0))
2047 /* If the field is at a fixed offset, then it is not
2049 if (TYPE_FIELD_LOC_KIND (type
, i
) != FIELD_LOC_KIND_DWARF_BLOCK
)
2051 /* Do not consider C++ virtual base types to be dynamic
2052 due to the field's offset being dynamic; these are
2053 handled via other means. */
2054 if (is_cplus
&& BASETYPE_VIA_VIRTUAL (type
, i
))
2065 /* See gdbtypes.h. */
2068 is_dynamic_type (struct type
*type
)
2070 return is_dynamic_type_internal (type
, 1);
2073 static struct type
*resolve_dynamic_type_internal
2074 (struct type
*type
, struct property_addr_info
*addr_stack
, int top_level
);
2076 /* Given a dynamic range type (dyn_range_type) and a stack of
2077 struct property_addr_info elements, return a static version
2080 static struct type
*
2081 resolve_dynamic_range (struct type
*dyn_range_type
,
2082 struct property_addr_info
*addr_stack
)
2085 struct type
*static_range_type
, *static_target_type
;
2086 const struct dynamic_prop
*prop
;
2087 struct dynamic_prop low_bound
, high_bound
, stride
;
2089 gdb_assert (dyn_range_type
->code () == TYPE_CODE_RANGE
);
2091 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->low
;
2092 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2094 low_bound
.kind
= PROP_CONST
;
2095 low_bound
.data
.const_val
= value
;
2099 low_bound
.kind
= PROP_UNDEFINED
;
2100 low_bound
.data
.const_val
= 0;
2103 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->high
;
2104 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2106 high_bound
.kind
= PROP_CONST
;
2107 high_bound
.data
.const_val
= value
;
2109 if (TYPE_RANGE_DATA (dyn_range_type
)->flag_upper_bound_is_count
)
2110 high_bound
.data
.const_val
2111 = low_bound
.data
.const_val
+ high_bound
.data
.const_val
- 1;
2115 high_bound
.kind
= PROP_UNDEFINED
;
2116 high_bound
.data
.const_val
= 0;
2119 bool byte_stride_p
= TYPE_RANGE_DATA (dyn_range_type
)->flag_is_byte_stride
;
2120 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->stride
;
2121 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2123 stride
.kind
= PROP_CONST
;
2124 stride
.data
.const_val
= value
;
2126 /* If we have a bit stride that is not an exact number of bytes then
2127 I really don't think this is going to work with current GDB, the
2128 array indexing code in GDB seems to be pretty heavily tied to byte
2129 offsets right now. Assuming 8 bits in a byte. */
2130 struct gdbarch
*gdbarch
= get_type_arch (dyn_range_type
);
2131 int unit_size
= gdbarch_addressable_memory_unit_size (gdbarch
);
2132 if (!byte_stride_p
&& (value
% (unit_size
* 8)) != 0)
2133 error (_("bit strides that are not a multiple of the byte size "
2134 "are currently not supported"));
2138 stride
.kind
= PROP_UNDEFINED
;
2139 stride
.data
.const_val
= 0;
2140 byte_stride_p
= true;
2144 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (dyn_range_type
),
2146 LONGEST bias
= TYPE_RANGE_DATA (dyn_range_type
)->bias
;
2147 static_range_type
= create_range_type_with_stride
2148 (copy_type (dyn_range_type
), static_target_type
,
2149 &low_bound
, &high_bound
, bias
, &stride
, byte_stride_p
);
2150 TYPE_RANGE_DATA (static_range_type
)->flag_bound_evaluated
= 1;
2151 return static_range_type
;
2154 /* Resolves dynamic bound values of an array or string type TYPE to static
2155 ones. ADDR_STACK is a stack of struct property_addr_info to be used if
2156 needed during the dynamic resolution. */
2158 static struct type
*
2159 resolve_dynamic_array_or_string (struct type
*type
,
2160 struct property_addr_info
*addr_stack
)
2163 struct type
*elt_type
;
2164 struct type
*range_type
;
2165 struct type
*ary_dim
;
2166 struct dynamic_prop
*prop
;
2167 unsigned int bit_stride
= 0;
2169 /* For dynamic type resolution strings can be treated like arrays of
2171 gdb_assert (type
->code () == TYPE_CODE_ARRAY
2172 || type
->code () == TYPE_CODE_STRING
);
2174 type
= copy_type (type
);
2177 range_type
= check_typedef (TYPE_INDEX_TYPE (elt_type
));
2178 range_type
= resolve_dynamic_range (range_type
, addr_stack
);
2180 /* Resolve allocated/associated here before creating a new array type, which
2181 will update the length of the array accordingly. */
2182 prop
= TYPE_ALLOCATED_PROP (type
);
2183 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2185 TYPE_DYN_PROP_ADDR (prop
) = value
;
2186 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2188 prop
= TYPE_ASSOCIATED_PROP (type
);
2189 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2191 TYPE_DYN_PROP_ADDR (prop
) = value
;
2192 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2195 ary_dim
= check_typedef (TYPE_TARGET_TYPE (elt_type
));
2197 if (ary_dim
!= NULL
&& ary_dim
->code () == TYPE_CODE_ARRAY
)
2198 elt_type
= resolve_dynamic_array_or_string (ary_dim
, addr_stack
);
2200 elt_type
= TYPE_TARGET_TYPE (type
);
2202 prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
2205 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2207 type
->remove_dyn_prop (DYN_PROP_BYTE_STRIDE
);
2208 bit_stride
= (unsigned int) (value
* 8);
2212 /* Could be a bug in our code, but it could also happen
2213 if the DWARF info is not correct. Issue a warning,
2214 and assume no byte/bit stride (leave bit_stride = 0). */
2215 warning (_("cannot determine array stride for type %s"),
2216 type
->name () ? type
->name () : "<no name>");
2220 bit_stride
= TYPE_FIELD_BITSIZE (type
, 0);
2222 return create_array_type_with_stride (type
, elt_type
, range_type
, NULL
,
2226 /* Resolve dynamic bounds of members of the union TYPE to static
2227 bounds. ADDR_STACK is a stack of struct property_addr_info
2228 to be used if needed during the dynamic resolution. */
2230 static struct type
*
2231 resolve_dynamic_union (struct type
*type
,
2232 struct property_addr_info
*addr_stack
)
2234 struct type
*resolved_type
;
2236 unsigned int max_len
= 0;
2238 gdb_assert (type
->code () == TYPE_CODE_UNION
);
2240 resolved_type
= copy_type (type
);
2241 TYPE_FIELDS (resolved_type
)
2242 = (struct field
*) TYPE_ALLOC (resolved_type
,
2243 TYPE_NFIELDS (resolved_type
)
2244 * sizeof (struct field
));
2245 memcpy (TYPE_FIELDS (resolved_type
),
2247 TYPE_NFIELDS (resolved_type
) * sizeof (struct field
));
2248 for (i
= 0; i
< TYPE_NFIELDS (resolved_type
); ++i
)
2252 if (field_is_static (&TYPE_FIELD (type
, i
)))
2255 t
= resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2257 TYPE_FIELD_TYPE (resolved_type
, i
) = t
;
2258 if (TYPE_LENGTH (t
) > max_len
)
2259 max_len
= TYPE_LENGTH (t
);
2262 TYPE_LENGTH (resolved_type
) = max_len
;
2263 return resolved_type
;
2266 /* See gdbtypes.h. */
2269 variant::matches (ULONGEST value
, bool is_unsigned
) const
2271 for (const discriminant_range
&range
: discriminants
)
2272 if (range
.contains (value
, is_unsigned
))
2278 compute_variant_fields_inner (struct type
*type
,
2279 struct property_addr_info
*addr_stack
,
2280 const variant_part
&part
,
2281 std::vector
<bool> &flags
);
2283 /* A helper function to determine which variant fields will be active.
2284 This handles both the variant's direct fields, and any variant
2285 parts embedded in this variant. TYPE is the type we're examining.
2286 ADDR_STACK holds information about the concrete object. VARIANT is
2287 the current variant to be handled. FLAGS is where the results are
2288 stored -- this function sets the Nth element in FLAGS if the
2289 corresponding field is enabled. ENABLED is whether this variant is
2293 compute_variant_fields_recurse (struct type
*type
,
2294 struct property_addr_info
*addr_stack
,
2295 const variant
&variant
,
2296 std::vector
<bool> &flags
,
2299 for (int field
= variant
.first_field
; field
< variant
.last_field
; ++field
)
2300 flags
[field
] = enabled
;
2302 for (const variant_part
&new_part
: variant
.parts
)
2305 compute_variant_fields_inner (type
, addr_stack
, new_part
, flags
);
2308 for (const auto &sub_variant
: new_part
.variants
)
2309 compute_variant_fields_recurse (type
, addr_stack
, sub_variant
,
2315 /* A helper function to determine which variant fields will be active.
2316 This evaluates the discriminant, decides which variant (if any) is
2317 active, and then updates FLAGS to reflect which fields should be
2318 available. TYPE is the type we're examining. ADDR_STACK holds
2319 information about the concrete object. VARIANT is the current
2320 variant to be handled. FLAGS is where the results are stored --
2321 this function sets the Nth element in FLAGS if the corresponding
2322 field is enabled. */
2325 compute_variant_fields_inner (struct type
*type
,
2326 struct property_addr_info
*addr_stack
,
2327 const variant_part
&part
,
2328 std::vector
<bool> &flags
)
2330 /* Evaluate the discriminant. */
2331 gdb::optional
<ULONGEST
> discr_value
;
2332 if (part
.discriminant_index
!= -1)
2334 int idx
= part
.discriminant_index
;
2336 if (TYPE_FIELD_LOC_KIND (type
, idx
) != FIELD_LOC_KIND_BITPOS
)
2337 error (_("Cannot determine struct field location"
2338 " (invalid location kind)"));
2340 if (addr_stack
->valaddr
.data () != NULL
)
2341 discr_value
= unpack_field_as_long (type
, addr_stack
->valaddr
.data (),
2345 CORE_ADDR addr
= (addr_stack
->addr
2346 + (TYPE_FIELD_BITPOS (type
, idx
)
2347 / TARGET_CHAR_BIT
));
2349 LONGEST bitsize
= TYPE_FIELD_BITSIZE (type
, idx
);
2350 LONGEST size
= bitsize
/ 8;
2352 size
= TYPE_LENGTH (TYPE_FIELD_TYPE (type
, idx
));
2354 gdb_byte bits
[sizeof (ULONGEST
)];
2355 read_memory (addr
, bits
, size
);
2357 LONGEST bitpos
= (TYPE_FIELD_BITPOS (type
, idx
)
2360 discr_value
= unpack_bits_as_long (TYPE_FIELD_TYPE (type
, idx
),
2361 bits
, bitpos
, bitsize
);
2365 /* Go through each variant and see which applies. */
2366 const variant
*default_variant
= nullptr;
2367 const variant
*applied_variant
= nullptr;
2368 for (const auto &variant
: part
.variants
)
2370 if (variant
.is_default ())
2371 default_variant
= &variant
;
2372 else if (discr_value
.has_value ()
2373 && variant
.matches (*discr_value
, part
.is_unsigned
))
2375 applied_variant
= &variant
;
2379 if (applied_variant
== nullptr)
2380 applied_variant
= default_variant
;
2382 for (const auto &variant
: part
.variants
)
2383 compute_variant_fields_recurse (type
, addr_stack
, variant
,
2384 flags
, applied_variant
== &variant
);
2387 /* Determine which variant fields are available in TYPE. The enabled
2388 fields are stored in RESOLVED_TYPE. ADDR_STACK holds information
2389 about the concrete object. PARTS describes the top-level variant
2390 parts for this type. */
2393 compute_variant_fields (struct type
*type
,
2394 struct type
*resolved_type
,
2395 struct property_addr_info
*addr_stack
,
2396 const gdb::array_view
<variant_part
> &parts
)
2398 /* Assume all fields are included by default. */
2399 std::vector
<bool> flags (TYPE_NFIELDS (resolved_type
), true);
2401 /* Now disable fields based on the variants that control them. */
2402 for (const auto &part
: parts
)
2403 compute_variant_fields_inner (type
, addr_stack
, part
, flags
);
2405 resolved_type
->set_num_fields
2406 (std::count (flags
.begin (), flags
.end (), true));
2407 TYPE_FIELDS (resolved_type
)
2408 = (struct field
*) TYPE_ALLOC (resolved_type
,
2409 TYPE_NFIELDS (resolved_type
)
2410 * sizeof (struct field
));
2412 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
2417 TYPE_FIELD (resolved_type
, out
) = TYPE_FIELD (type
, i
);
2422 /* Resolve dynamic bounds of members of the struct TYPE to static
2423 bounds. ADDR_STACK is a stack of struct property_addr_info to
2424 be used if needed during the dynamic resolution. */
2426 static struct type
*
2427 resolve_dynamic_struct (struct type
*type
,
2428 struct property_addr_info
*addr_stack
)
2430 struct type
*resolved_type
;
2432 unsigned resolved_type_bit_length
= 0;
2434 gdb_assert (type
->code () == TYPE_CODE_STRUCT
);
2435 gdb_assert (TYPE_NFIELDS (type
) > 0);
2437 resolved_type
= copy_type (type
);
2439 dynamic_prop
*variant_prop
= resolved_type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
2440 if (variant_prop
!= nullptr && variant_prop
->kind
== PROP_VARIANT_PARTS
)
2442 compute_variant_fields (type
, resolved_type
, addr_stack
,
2443 *variant_prop
->data
.variant_parts
);
2444 /* We want to leave the property attached, so that the Rust code
2445 can tell whether the type was originally an enum. */
2446 variant_prop
->kind
= PROP_TYPE
;
2447 variant_prop
->data
.original_type
= type
;
2451 TYPE_FIELDS (resolved_type
)
2452 = (struct field
*) TYPE_ALLOC (resolved_type
,
2453 TYPE_NFIELDS (resolved_type
)
2454 * sizeof (struct field
));
2455 memcpy (TYPE_FIELDS (resolved_type
),
2457 TYPE_NFIELDS (resolved_type
) * sizeof (struct field
));
2460 for (i
= 0; i
< TYPE_NFIELDS (resolved_type
); ++i
)
2462 unsigned new_bit_length
;
2463 struct property_addr_info pinfo
;
2465 if (field_is_static (&TYPE_FIELD (resolved_type
, i
)))
2468 if (TYPE_FIELD_LOC_KIND (resolved_type
, i
) == FIELD_LOC_KIND_DWARF_BLOCK
)
2470 struct dwarf2_property_baton baton
;
2472 = lookup_pointer_type (TYPE_FIELD_TYPE (resolved_type
, i
));
2473 baton
.locexpr
= *TYPE_FIELD_DWARF_BLOCK (resolved_type
, i
);
2475 struct dynamic_prop prop
;
2476 prop
.kind
= PROP_LOCEXPR
;
2477 prop
.data
.baton
= &baton
;
2480 if (dwarf2_evaluate_property (&prop
, nullptr, addr_stack
, &addr
,
2482 SET_FIELD_BITPOS (TYPE_FIELD (resolved_type
, i
),
2483 TARGET_CHAR_BIT
* (addr
- addr_stack
->addr
));
2486 /* As we know this field is not a static field, the field's
2487 field_loc_kind should be FIELD_LOC_KIND_BITPOS. Verify
2488 this is the case, but only trigger a simple error rather
2489 than an internal error if that fails. While failing
2490 that verification indicates a bug in our code, the error
2491 is not severe enough to suggest to the user he stops
2492 his debugging session because of it. */
2493 if (TYPE_FIELD_LOC_KIND (resolved_type
, i
) != FIELD_LOC_KIND_BITPOS
)
2494 error (_("Cannot determine struct field location"
2495 " (invalid location kind)"));
2497 pinfo
.type
= check_typedef (TYPE_FIELD_TYPE (resolved_type
, i
));
2498 pinfo
.valaddr
= addr_stack
->valaddr
;
2501 + (TYPE_FIELD_BITPOS (resolved_type
, i
) / TARGET_CHAR_BIT
));
2502 pinfo
.next
= addr_stack
;
2504 TYPE_FIELD_TYPE (resolved_type
, i
)
2505 = resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2507 gdb_assert (TYPE_FIELD_LOC_KIND (resolved_type
, i
)
2508 == FIELD_LOC_KIND_BITPOS
);
2510 new_bit_length
= TYPE_FIELD_BITPOS (resolved_type
, i
);
2511 if (TYPE_FIELD_BITSIZE (resolved_type
, i
) != 0)
2512 new_bit_length
+= TYPE_FIELD_BITSIZE (resolved_type
, i
);
2514 new_bit_length
+= (TYPE_LENGTH (TYPE_FIELD_TYPE (resolved_type
, i
))
2517 /* Normally, we would use the position and size of the last field
2518 to determine the size of the enclosing structure. But GCC seems
2519 to be encoding the position of some fields incorrectly when
2520 the struct contains a dynamic field that is not placed last.
2521 So we compute the struct size based on the field that has
2522 the highest position + size - probably the best we can do. */
2523 if (new_bit_length
> resolved_type_bit_length
)
2524 resolved_type_bit_length
= new_bit_length
;
2527 /* The length of a type won't change for fortran, but it does for C and Ada.
2528 For fortran the size of dynamic fields might change over time but not the
2529 type length of the structure. If we adapt it, we run into problems
2530 when calculating the element offset for arrays of structs. */
2531 if (current_language
->la_language
!= language_fortran
)
2532 TYPE_LENGTH (resolved_type
)
2533 = (resolved_type_bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2535 /* The Ada language uses this field as a cache for static fixed types: reset
2536 it as RESOLVED_TYPE must have its own static fixed type. */
2537 TYPE_TARGET_TYPE (resolved_type
) = NULL
;
2539 return resolved_type
;
2542 /* Worker for resolved_dynamic_type. */
2544 static struct type
*
2545 resolve_dynamic_type_internal (struct type
*type
,
2546 struct property_addr_info
*addr_stack
,
2549 struct type
*real_type
= check_typedef (type
);
2550 struct type
*resolved_type
= nullptr;
2551 struct dynamic_prop
*prop
;
2554 if (!is_dynamic_type_internal (real_type
, top_level
))
2557 gdb::optional
<CORE_ADDR
> type_length
;
2558 prop
= TYPE_DYNAMIC_LENGTH (type
);
2560 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2561 type_length
= value
;
2563 if (type
->code () == TYPE_CODE_TYPEDEF
)
2565 resolved_type
= copy_type (type
);
2566 TYPE_TARGET_TYPE (resolved_type
)
2567 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
), addr_stack
,
2572 /* Before trying to resolve TYPE, make sure it is not a stub. */
2575 switch (type
->code ())
2579 struct property_addr_info pinfo
;
2581 pinfo
.type
= check_typedef (TYPE_TARGET_TYPE (type
));
2583 if (addr_stack
->valaddr
.data () != NULL
)
2584 pinfo
.addr
= extract_typed_address (addr_stack
->valaddr
.data (),
2587 pinfo
.addr
= read_memory_typed_address (addr_stack
->addr
, type
);
2588 pinfo
.next
= addr_stack
;
2590 resolved_type
= copy_type (type
);
2591 TYPE_TARGET_TYPE (resolved_type
)
2592 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
),
2597 case TYPE_CODE_STRING
:
2598 /* Strings are very much like an array of characters, and can be
2599 treated as one here. */
2600 case TYPE_CODE_ARRAY
:
2601 resolved_type
= resolve_dynamic_array_or_string (type
, addr_stack
);
2604 case TYPE_CODE_RANGE
:
2605 resolved_type
= resolve_dynamic_range (type
, addr_stack
);
2608 case TYPE_CODE_UNION
:
2609 resolved_type
= resolve_dynamic_union (type
, addr_stack
);
2612 case TYPE_CODE_STRUCT
:
2613 resolved_type
= resolve_dynamic_struct (type
, addr_stack
);
2618 if (resolved_type
== nullptr)
2621 if (type_length
.has_value ())
2623 TYPE_LENGTH (resolved_type
) = *type_length
;
2624 resolved_type
->remove_dyn_prop (DYN_PROP_BYTE_SIZE
);
2627 /* Resolve data_location attribute. */
2628 prop
= TYPE_DATA_LOCATION (resolved_type
);
2630 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2632 TYPE_DYN_PROP_ADDR (prop
) = value
;
2633 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2636 return resolved_type
;
2639 /* See gdbtypes.h */
2642 resolve_dynamic_type (struct type
*type
,
2643 gdb::array_view
<const gdb_byte
> valaddr
,
2646 struct property_addr_info pinfo
2647 = {check_typedef (type
), valaddr
, addr
, NULL
};
2649 return resolve_dynamic_type_internal (type
, &pinfo
, 1);
2652 /* See gdbtypes.h */
2655 type::dyn_prop (dynamic_prop_node_kind prop_kind
) const
2657 dynamic_prop_list
*node
= this->main_type
->dyn_prop_list
;
2659 while (node
!= NULL
)
2661 if (node
->prop_kind
== prop_kind
)
2668 /* See gdbtypes.h */
2671 type::add_dyn_prop (dynamic_prop_node_kind prop_kind
, dynamic_prop prop
)
2673 struct dynamic_prop_list
*temp
;
2675 gdb_assert (TYPE_OBJFILE_OWNED (this));
2677 temp
= XOBNEW (&TYPE_OBJFILE (this)->objfile_obstack
,
2678 struct dynamic_prop_list
);
2679 temp
->prop_kind
= prop_kind
;
2681 temp
->next
= this->main_type
->dyn_prop_list
;
2683 this->main_type
->dyn_prop_list
= temp
;
2686 /* See gdbtypes.h. */
2689 type::remove_dyn_prop (dynamic_prop_node_kind kind
)
2691 struct dynamic_prop_list
*prev_node
, *curr_node
;
2693 curr_node
= this->main_type
->dyn_prop_list
;
2696 while (NULL
!= curr_node
)
2698 if (curr_node
->prop_kind
== kind
)
2700 /* Update the linked list but don't free anything.
2701 The property was allocated on objstack and it is not known
2702 if we are on top of it. Nevertheless, everything is released
2703 when the complete objstack is freed. */
2704 if (NULL
== prev_node
)
2705 this->main_type
->dyn_prop_list
= curr_node
->next
;
2707 prev_node
->next
= curr_node
->next
;
2712 prev_node
= curr_node
;
2713 curr_node
= curr_node
->next
;
2717 /* Find the real type of TYPE. This function returns the real type,
2718 after removing all layers of typedefs, and completing opaque or stub
2719 types. Completion changes the TYPE argument, but stripping of
2722 Instance flags (e.g. const/volatile) are preserved as typedefs are
2723 stripped. If necessary a new qualified form of the underlying type
2726 NOTE: This will return a typedef if TYPE_TARGET_TYPE for the typedef has
2727 not been computed and we're either in the middle of reading symbols, or
2728 there was no name for the typedef in the debug info.
2730 NOTE: Lookup of opaque types can throw errors for invalid symbol files.
2731 QUITs in the symbol reading code can also throw.
2732 Thus this function can throw an exception.
2734 If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
2737 If this is a stubbed struct (i.e. declared as struct foo *), see if
2738 we can find a full definition in some other file. If so, copy this
2739 definition, so we can use it in future. There used to be a comment
2740 (but not any code) that if we don't find a full definition, we'd
2741 set a flag so we don't spend time in the future checking the same
2742 type. That would be a mistake, though--we might load in more
2743 symbols which contain a full definition for the type. */
2746 check_typedef (struct type
*type
)
2748 struct type
*orig_type
= type
;
2749 /* While we're removing typedefs, we don't want to lose qualifiers.
2750 E.g., const/volatile. */
2751 int instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2755 while (type
->code () == TYPE_CODE_TYPEDEF
)
2757 if (!TYPE_TARGET_TYPE (type
))
2762 /* It is dangerous to call lookup_symbol if we are currently
2763 reading a symtab. Infinite recursion is one danger. */
2764 if (currently_reading_symtab
)
2765 return make_qualified_type (type
, instance_flags
, NULL
);
2767 name
= type
->name ();
2768 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or
2769 VAR_DOMAIN as appropriate? */
2772 stub_noname_complaint ();
2773 return make_qualified_type (type
, instance_flags
, NULL
);
2775 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2777 TYPE_TARGET_TYPE (type
) = SYMBOL_TYPE (sym
);
2778 else /* TYPE_CODE_UNDEF */
2779 TYPE_TARGET_TYPE (type
) = alloc_type_arch (get_type_arch (type
));
2781 type
= TYPE_TARGET_TYPE (type
);
2783 /* Preserve the instance flags as we traverse down the typedef chain.
2785 Handling address spaces/classes is nasty, what do we do if there's a
2787 E.g., what if an outer typedef marks the type as class_1 and an inner
2788 typedef marks the type as class_2?
2789 This is the wrong place to do such error checking. We leave it to
2790 the code that created the typedef in the first place to flag the
2791 error. We just pick the outer address space (akin to letting the
2792 outer cast in a chain of casting win), instead of assuming
2793 "it can't happen". */
2795 const int ALL_SPACES
= (TYPE_INSTANCE_FLAG_CODE_SPACE
2796 | TYPE_INSTANCE_FLAG_DATA_SPACE
);
2797 const int ALL_CLASSES
= TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
;
2798 int new_instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2800 /* Treat code vs data spaces and address classes separately. */
2801 if ((instance_flags
& ALL_SPACES
) != 0)
2802 new_instance_flags
&= ~ALL_SPACES
;
2803 if ((instance_flags
& ALL_CLASSES
) != 0)
2804 new_instance_flags
&= ~ALL_CLASSES
;
2806 instance_flags
|= new_instance_flags
;
2810 /* If this is a struct/class/union with no fields, then check
2811 whether a full definition exists somewhere else. This is for
2812 systems where a type definition with no fields is issued for such
2813 types, instead of identifying them as stub types in the first
2816 if (TYPE_IS_OPAQUE (type
)
2817 && opaque_type_resolution
2818 && !currently_reading_symtab
)
2820 const char *name
= type
->name ();
2821 struct type
*newtype
;
2825 stub_noname_complaint ();
2826 return make_qualified_type (type
, instance_flags
, NULL
);
2828 newtype
= lookup_transparent_type (name
);
2832 /* If the resolved type and the stub are in the same
2833 objfile, then replace the stub type with the real deal.
2834 But if they're in separate objfiles, leave the stub
2835 alone; we'll just look up the transparent type every time
2836 we call check_typedef. We can't create pointers between
2837 types allocated to different objfiles, since they may
2838 have different lifetimes. Trying to copy NEWTYPE over to
2839 TYPE's objfile is pointless, too, since you'll have to
2840 move over any other types NEWTYPE refers to, which could
2841 be an unbounded amount of stuff. */
2842 if (TYPE_OBJFILE (newtype
) == TYPE_OBJFILE (type
))
2843 type
= make_qualified_type (newtype
,
2844 TYPE_INSTANCE_FLAGS (type
),
2850 /* Otherwise, rely on the stub flag being set for opaque/stubbed
2852 else if (TYPE_STUB (type
) && !currently_reading_symtab
)
2854 const char *name
= type
->name ();
2855 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or VAR_DOMAIN
2861 stub_noname_complaint ();
2862 return make_qualified_type (type
, instance_flags
, NULL
);
2864 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2867 /* Same as above for opaque types, we can replace the stub
2868 with the complete type only if they are in the same
2870 if (TYPE_OBJFILE (SYMBOL_TYPE (sym
)) == TYPE_OBJFILE (type
))
2871 type
= make_qualified_type (SYMBOL_TYPE (sym
),
2872 TYPE_INSTANCE_FLAGS (type
),
2875 type
= SYMBOL_TYPE (sym
);
2879 if (TYPE_TARGET_STUB (type
))
2881 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
2883 if (TYPE_STUB (target_type
) || TYPE_TARGET_STUB (target_type
))
2885 /* Nothing we can do. */
2887 else if (type
->code () == TYPE_CODE_RANGE
)
2889 TYPE_LENGTH (type
) = TYPE_LENGTH (target_type
);
2890 TYPE_TARGET_STUB (type
) = 0;
2892 else if (type
->code () == TYPE_CODE_ARRAY
2893 && update_static_array_size (type
))
2894 TYPE_TARGET_STUB (type
) = 0;
2897 type
= make_qualified_type (type
, instance_flags
, NULL
);
2899 /* Cache TYPE_LENGTH for future use. */
2900 TYPE_LENGTH (orig_type
) = TYPE_LENGTH (type
);
2905 /* Parse a type expression in the string [P..P+LENGTH). If an error
2906 occurs, silently return a void type. */
2908 static struct type
*
2909 safe_parse_type (struct gdbarch
*gdbarch
, char *p
, int length
)
2911 struct ui_file
*saved_gdb_stderr
;
2912 struct type
*type
= NULL
; /* Initialize to keep gcc happy. */
2914 /* Suppress error messages. */
2915 saved_gdb_stderr
= gdb_stderr
;
2916 gdb_stderr
= &null_stream
;
2918 /* Call parse_and_eval_type() without fear of longjmp()s. */
2921 type
= parse_and_eval_type (p
, length
);
2923 catch (const gdb_exception_error
&except
)
2925 type
= builtin_type (gdbarch
)->builtin_void
;
2928 /* Stop suppressing error messages. */
2929 gdb_stderr
= saved_gdb_stderr
;
2934 /* Ugly hack to convert method stubs into method types.
2936 He ain't kiddin'. This demangles the name of the method into a
2937 string including argument types, parses out each argument type,
2938 generates a string casting a zero to that type, evaluates the
2939 string, and stuffs the resulting type into an argtype vector!!!
2940 Then it knows the type of the whole function (including argument
2941 types for overloading), which info used to be in the stab's but was
2942 removed to hack back the space required for them. */
2945 check_stub_method (struct type
*type
, int method_id
, int signature_id
)
2947 struct gdbarch
*gdbarch
= get_type_arch (type
);
2949 char *mangled_name
= gdb_mangle_name (type
, method_id
, signature_id
);
2950 char *demangled_name
= gdb_demangle (mangled_name
,
2951 DMGL_PARAMS
| DMGL_ANSI
);
2952 char *argtypetext
, *p
;
2953 int depth
= 0, argcount
= 1;
2954 struct field
*argtypes
;
2957 /* Make sure we got back a function string that we can use. */
2959 p
= strchr (demangled_name
, '(');
2963 if (demangled_name
== NULL
|| p
== NULL
)
2964 error (_("Internal: Cannot demangle mangled name `%s'."),
2967 /* Now, read in the parameters that define this type. */
2972 if (*p
== '(' || *p
== '<')
2976 else if (*p
== ')' || *p
== '>')
2980 else if (*p
== ',' && depth
== 0)
2988 /* If we read one argument and it was ``void'', don't count it. */
2989 if (startswith (argtypetext
, "(void)"))
2992 /* We need one extra slot, for the THIS pointer. */
2994 argtypes
= (struct field
*)
2995 TYPE_ALLOC (type
, (argcount
+ 1) * sizeof (struct field
));
2998 /* Add THIS pointer for non-static methods. */
2999 f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3000 if (TYPE_FN_FIELD_STATIC_P (f
, signature_id
))
3004 argtypes
[0].type
= lookup_pointer_type (type
);
3008 if (*p
!= ')') /* () means no args, skip while. */
3013 if (depth
<= 0 && (*p
== ',' || *p
== ')'))
3015 /* Avoid parsing of ellipsis, they will be handled below.
3016 Also avoid ``void'' as above. */
3017 if (strncmp (argtypetext
, "...", p
- argtypetext
) != 0
3018 && strncmp (argtypetext
, "void", p
- argtypetext
) != 0)
3020 argtypes
[argcount
].type
=
3021 safe_parse_type (gdbarch
, argtypetext
, p
- argtypetext
);
3024 argtypetext
= p
+ 1;
3027 if (*p
== '(' || *p
== '<')
3031 else if (*p
== ')' || *p
== '>')
3040 TYPE_FN_FIELD_PHYSNAME (f
, signature_id
) = mangled_name
;
3042 /* Now update the old "stub" type into a real type. */
3043 mtype
= TYPE_FN_FIELD_TYPE (f
, signature_id
);
3044 /* MTYPE may currently be a function (TYPE_CODE_FUNC).
3045 We want a method (TYPE_CODE_METHOD). */
3046 smash_to_method_type (mtype
, type
, TYPE_TARGET_TYPE (mtype
),
3047 argtypes
, argcount
, p
[-2] == '.');
3048 TYPE_STUB (mtype
) = 0;
3049 TYPE_FN_FIELD_STUB (f
, signature_id
) = 0;
3051 xfree (demangled_name
);
3054 /* This is the external interface to check_stub_method, above. This
3055 function unstubs all of the signatures for TYPE's METHOD_ID method
3056 name. After calling this function TYPE_FN_FIELD_STUB will be
3057 cleared for each signature and TYPE_FN_FIELDLIST_NAME will be
3060 This function unfortunately can not die until stabs do. */
3063 check_stub_method_group (struct type
*type
, int method_id
)
3065 int len
= TYPE_FN_FIELDLIST_LENGTH (type
, method_id
);
3066 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3068 for (int j
= 0; j
< len
; j
++)
3070 if (TYPE_FN_FIELD_STUB (f
, j
))
3071 check_stub_method (type
, method_id
, j
);
3075 /* Ensure it is in .rodata (if available) by working around GCC PR 44690. */
3076 const struct cplus_struct_type cplus_struct_default
= { };
3079 allocate_cplus_struct_type (struct type
*type
)
3081 if (HAVE_CPLUS_STRUCT (type
))
3082 /* Structure was already allocated. Nothing more to do. */
3085 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_CPLUS_STUFF
;
3086 TYPE_RAW_CPLUS_SPECIFIC (type
) = (struct cplus_struct_type
*)
3087 TYPE_ALLOC (type
, sizeof (struct cplus_struct_type
));
3088 *(TYPE_RAW_CPLUS_SPECIFIC (type
)) = cplus_struct_default
;
3089 set_type_vptr_fieldno (type
, -1);
3092 const struct gnat_aux_type gnat_aux_default
=
3095 /* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
3096 and allocate the associated gnat-specific data. The gnat-specific
3097 data is also initialized to gnat_aux_default. */
3100 allocate_gnat_aux_type (struct type
*type
)
3102 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_GNAT_STUFF
;
3103 TYPE_GNAT_SPECIFIC (type
) = (struct gnat_aux_type
*)
3104 TYPE_ALLOC (type
, sizeof (struct gnat_aux_type
));
3105 *(TYPE_GNAT_SPECIFIC (type
)) = gnat_aux_default
;
3108 /* Helper function to initialize a newly allocated type. Set type code
3109 to CODE and initialize the type-specific fields accordingly. */
3112 set_type_code (struct type
*type
, enum type_code code
)
3114 type
->set_code (code
);
3118 case TYPE_CODE_STRUCT
:
3119 case TYPE_CODE_UNION
:
3120 case TYPE_CODE_NAMESPACE
:
3121 INIT_CPLUS_SPECIFIC (type
);
3124 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_FLOATFORMAT
;
3126 case TYPE_CODE_FUNC
:
3127 INIT_FUNC_SPECIFIC (type
);
3132 /* Helper function to verify floating-point format and size.
3133 BIT is the type size in bits; if BIT equals -1, the size is
3134 determined by the floatformat. Returns size to be used. */
3137 verify_floatformat (int bit
, const struct floatformat
*floatformat
)
3139 gdb_assert (floatformat
!= NULL
);
3142 bit
= floatformat
->totalsize
;
3144 gdb_assert (bit
>= 0);
3145 gdb_assert (bit
>= floatformat
->totalsize
);
3150 /* Return the floating-point format for a floating-point variable of
3153 const struct floatformat
*
3154 floatformat_from_type (const struct type
*type
)
3156 gdb_assert (type
->code () == TYPE_CODE_FLT
);
3157 gdb_assert (TYPE_FLOATFORMAT (type
));
3158 return TYPE_FLOATFORMAT (type
);
3161 /* Helper function to initialize the standard scalar types.
3163 If NAME is non-NULL, then it is used to initialize the type name.
3164 Note that NAME is not copied; it is required to have a lifetime at
3165 least as long as OBJFILE. */
3168 init_type (struct objfile
*objfile
, enum type_code code
, int bit
,
3173 type
= alloc_type (objfile
);
3174 set_type_code (type
, code
);
3175 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
3176 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
3177 type
->set_name (name
);
3182 /* Allocate a TYPE_CODE_ERROR type structure associated with OBJFILE,
3183 to use with variables that have no debug info. NAME is the type
3186 static struct type
*
3187 init_nodebug_var_type (struct objfile
*objfile
, const char *name
)
3189 return init_type (objfile
, TYPE_CODE_ERROR
, 0, name
);
3192 /* Allocate a TYPE_CODE_INT type structure associated with OBJFILE.
3193 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3194 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3197 init_integer_type (struct objfile
*objfile
,
3198 int bit
, int unsigned_p
, const char *name
)
3202 t
= init_type (objfile
, TYPE_CODE_INT
, bit
, name
);
3204 TYPE_UNSIGNED (t
) = 1;
3209 /* Allocate a TYPE_CODE_CHAR type structure associated with OBJFILE.
3210 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3211 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3214 init_character_type (struct objfile
*objfile
,
3215 int bit
, int unsigned_p
, const char *name
)
3219 t
= init_type (objfile
, TYPE_CODE_CHAR
, bit
, name
);
3221 TYPE_UNSIGNED (t
) = 1;
3226 /* Allocate a TYPE_CODE_BOOL type structure associated with OBJFILE.
3227 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3228 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3231 init_boolean_type (struct objfile
*objfile
,
3232 int bit
, int unsigned_p
, const char *name
)
3236 t
= init_type (objfile
, TYPE_CODE_BOOL
, bit
, name
);
3238 TYPE_UNSIGNED (t
) = 1;
3243 /* Allocate a TYPE_CODE_FLT type structure associated with OBJFILE.
3244 BIT is the type size in bits; if BIT equals -1, the size is
3245 determined by the floatformat. NAME is the type name. Set the
3246 TYPE_FLOATFORMAT from FLOATFORMATS. BYTE_ORDER is the byte order
3247 to use. If it is BFD_ENDIAN_UNKNOWN (the default), then the byte
3248 order of the objfile's architecture is used. */
3251 init_float_type (struct objfile
*objfile
,
3252 int bit
, const char *name
,
3253 const struct floatformat
**floatformats
,
3254 enum bfd_endian byte_order
)
3256 if (byte_order
== BFD_ENDIAN_UNKNOWN
)
3258 struct gdbarch
*gdbarch
= objfile
->arch ();
3259 byte_order
= gdbarch_byte_order (gdbarch
);
3261 const struct floatformat
*fmt
= floatformats
[byte_order
];
3264 bit
= verify_floatformat (bit
, fmt
);
3265 t
= init_type (objfile
, TYPE_CODE_FLT
, bit
, name
);
3266 TYPE_FLOATFORMAT (t
) = fmt
;
3271 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with OBJFILE.
3272 BIT is the type size in bits. NAME is the type name. */
3275 init_decfloat_type (struct objfile
*objfile
, int bit
, const char *name
)
3279 t
= init_type (objfile
, TYPE_CODE_DECFLOAT
, bit
, name
);
3283 /* Allocate a TYPE_CODE_COMPLEX type structure. NAME is the type
3284 name. TARGET_TYPE is the component type. */
3287 init_complex_type (const char *name
, struct type
*target_type
)
3291 gdb_assert (target_type
->code () == TYPE_CODE_INT
3292 || target_type
->code () == TYPE_CODE_FLT
);
3294 if (TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
== nullptr)
3296 if (name
== nullptr)
3299 = (char *) TYPE_ALLOC (target_type
,
3300 strlen (target_type
->name ())
3301 + strlen ("_Complex ") + 1);
3302 strcpy (new_name
, "_Complex ");
3303 strcat (new_name
, target_type
->name ());
3307 t
= alloc_type_copy (target_type
);
3308 set_type_code (t
, TYPE_CODE_COMPLEX
);
3309 TYPE_LENGTH (t
) = 2 * TYPE_LENGTH (target_type
);
3312 TYPE_TARGET_TYPE (t
) = target_type
;
3313 TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
= t
;
3316 return TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
;
3319 /* Allocate a TYPE_CODE_PTR type structure associated with OBJFILE.
3320 BIT is the pointer type size in bits. NAME is the type name.
3321 TARGET_TYPE is the pointer target type. Always sets the pointer type's
3322 TYPE_UNSIGNED flag. */
3325 init_pointer_type (struct objfile
*objfile
,
3326 int bit
, const char *name
, struct type
*target_type
)
3330 t
= init_type (objfile
, TYPE_CODE_PTR
, bit
, name
);
3331 TYPE_TARGET_TYPE (t
) = target_type
;
3332 TYPE_UNSIGNED (t
) = 1;
3336 /* See gdbtypes.h. */
3339 type_raw_align (struct type
*type
)
3341 if (type
->align_log2
!= 0)
3342 return 1 << (type
->align_log2
- 1);
3346 /* See gdbtypes.h. */
3349 type_align (struct type
*type
)
3351 /* Check alignment provided in the debug information. */
3352 unsigned raw_align
= type_raw_align (type
);
3356 /* Allow the architecture to provide an alignment. */
3357 struct gdbarch
*arch
= get_type_arch (type
);
3358 ULONGEST align
= gdbarch_type_align (arch
, type
);
3362 switch (type
->code ())
3365 case TYPE_CODE_FUNC
:
3366 case TYPE_CODE_FLAGS
:
3368 case TYPE_CODE_RANGE
:
3370 case TYPE_CODE_ENUM
:
3372 case TYPE_CODE_RVALUE_REF
:
3373 case TYPE_CODE_CHAR
:
3374 case TYPE_CODE_BOOL
:
3375 case TYPE_CODE_DECFLOAT
:
3376 case TYPE_CODE_METHODPTR
:
3377 case TYPE_CODE_MEMBERPTR
:
3378 align
= type_length_units (check_typedef (type
));
3381 case TYPE_CODE_ARRAY
:
3382 case TYPE_CODE_COMPLEX
:
3383 case TYPE_CODE_TYPEDEF
:
3384 align
= type_align (TYPE_TARGET_TYPE (type
));
3387 case TYPE_CODE_STRUCT
:
3388 case TYPE_CODE_UNION
:
3390 int number_of_non_static_fields
= 0;
3391 for (unsigned i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
3393 if (!field_is_static (&TYPE_FIELD (type
, i
)))
3395 number_of_non_static_fields
++;
3396 ULONGEST f_align
= type_align (TYPE_FIELD_TYPE (type
, i
));
3399 /* Don't pretend we know something we don't. */
3403 if (f_align
> align
)
3407 /* A struct with no fields, or with only static fields has an
3409 if (number_of_non_static_fields
== 0)
3415 case TYPE_CODE_STRING
:
3416 /* Not sure what to do here, and these can't appear in C or C++
3420 case TYPE_CODE_VOID
:
3424 case TYPE_CODE_ERROR
:
3425 case TYPE_CODE_METHOD
:
3430 if ((align
& (align
- 1)) != 0)
3432 /* Not a power of 2, so pass. */
3439 /* See gdbtypes.h. */
3442 set_type_align (struct type
*type
, ULONGEST align
)
3444 /* Must be a power of 2. Zero is ok. */
3445 gdb_assert ((align
& (align
- 1)) == 0);
3447 unsigned result
= 0;
3454 if (result
>= (1 << TYPE_ALIGN_BITS
))
3457 type
->align_log2
= result
;
3462 /* Queries on types. */
3465 can_dereference (struct type
*t
)
3467 /* FIXME: Should we return true for references as well as
3469 t
= check_typedef (t
);
3472 && t
->code () == TYPE_CODE_PTR
3473 && TYPE_TARGET_TYPE (t
)->code () != TYPE_CODE_VOID
);
3477 is_integral_type (struct type
*t
)
3479 t
= check_typedef (t
);
3482 && ((t
->code () == TYPE_CODE_INT
)
3483 || (t
->code () == TYPE_CODE_ENUM
)
3484 || (t
->code () == TYPE_CODE_FLAGS
)
3485 || (t
->code () == TYPE_CODE_CHAR
)
3486 || (t
->code () == TYPE_CODE_RANGE
)
3487 || (t
->code () == TYPE_CODE_BOOL
)));
3491 is_floating_type (struct type
*t
)
3493 t
= check_typedef (t
);
3496 && ((t
->code () == TYPE_CODE_FLT
)
3497 || (t
->code () == TYPE_CODE_DECFLOAT
)));
3500 /* Return true if TYPE is scalar. */
3503 is_scalar_type (struct type
*type
)
3505 type
= check_typedef (type
);
3507 switch (type
->code ())
3509 case TYPE_CODE_ARRAY
:
3510 case TYPE_CODE_STRUCT
:
3511 case TYPE_CODE_UNION
:
3513 case TYPE_CODE_STRING
:
3520 /* Return true if T is scalar, or a composite type which in practice has
3521 the memory layout of a scalar type. E.g., an array or struct with only
3522 one scalar element inside it, or a union with only scalar elements. */
3525 is_scalar_type_recursive (struct type
*t
)
3527 t
= check_typedef (t
);
3529 if (is_scalar_type (t
))
3531 /* Are we dealing with an array or string of known dimensions? */
3532 else if ((t
->code () == TYPE_CODE_ARRAY
3533 || t
->code () == TYPE_CODE_STRING
) && TYPE_NFIELDS (t
) == 1
3534 && TYPE_INDEX_TYPE(t
)->code () == TYPE_CODE_RANGE
)
3536 LONGEST low_bound
, high_bound
;
3537 struct type
*elt_type
= check_typedef (TYPE_TARGET_TYPE (t
));
3539 get_discrete_bounds (TYPE_INDEX_TYPE (t
), &low_bound
, &high_bound
);
3541 return high_bound
== low_bound
&& is_scalar_type_recursive (elt_type
);
3543 /* Are we dealing with a struct with one element? */
3544 else if (t
->code () == TYPE_CODE_STRUCT
&& TYPE_NFIELDS (t
) == 1)
3545 return is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, 0));
3546 else if (t
->code () == TYPE_CODE_UNION
)
3548 int i
, n
= TYPE_NFIELDS (t
);
3550 /* If all elements of the union are scalar, then the union is scalar. */
3551 for (i
= 0; i
< n
; i
++)
3552 if (!is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, i
)))
3561 /* Return true is T is a class or a union. False otherwise. */
3564 class_or_union_p (const struct type
*t
)
3566 return (t
->code () == TYPE_CODE_STRUCT
3567 || t
->code () == TYPE_CODE_UNION
);
3570 /* A helper function which returns true if types A and B represent the
3571 "same" class type. This is true if the types have the same main
3572 type, or the same name. */
3575 class_types_same_p (const struct type
*a
, const struct type
*b
)
3577 return (TYPE_MAIN_TYPE (a
) == TYPE_MAIN_TYPE (b
)
3578 || (a
->name () && b
->name ()
3579 && !strcmp (a
->name (), b
->name ())));
3582 /* If BASE is an ancestor of DCLASS return the distance between them.
3583 otherwise return -1;
3587 class B: public A {};
3588 class C: public B {};
3591 distance_to_ancestor (A, A, 0) = 0
3592 distance_to_ancestor (A, B, 0) = 1
3593 distance_to_ancestor (A, C, 0) = 2
3594 distance_to_ancestor (A, D, 0) = 3
3596 If PUBLIC is 1 then only public ancestors are considered,
3597 and the function returns the distance only if BASE is a public ancestor
3601 distance_to_ancestor (A, D, 1) = -1. */
3604 distance_to_ancestor (struct type
*base
, struct type
*dclass
, int is_public
)
3609 base
= check_typedef (base
);
3610 dclass
= check_typedef (dclass
);
3612 if (class_types_same_p (base
, dclass
))
3615 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
); i
++)
3617 if (is_public
&& ! BASETYPE_VIA_PUBLIC (dclass
, i
))
3620 d
= distance_to_ancestor (base
, TYPE_BASECLASS (dclass
, i
), is_public
);
3628 /* Check whether BASE is an ancestor or base class or DCLASS
3629 Return 1 if so, and 0 if not.
3630 Note: If BASE and DCLASS are of the same type, this function
3631 will return 1. So for some class A, is_ancestor (A, A) will
3635 is_ancestor (struct type
*base
, struct type
*dclass
)
3637 return distance_to_ancestor (base
, dclass
, 0) >= 0;
3640 /* Like is_ancestor, but only returns true when BASE is a public
3641 ancestor of DCLASS. */
3644 is_public_ancestor (struct type
*base
, struct type
*dclass
)
3646 return distance_to_ancestor (base
, dclass
, 1) >= 0;
3649 /* A helper function for is_unique_ancestor. */
3652 is_unique_ancestor_worker (struct type
*base
, struct type
*dclass
,
3654 const gdb_byte
*valaddr
, int embedded_offset
,
3655 CORE_ADDR address
, struct value
*val
)
3659 base
= check_typedef (base
);
3660 dclass
= check_typedef (dclass
);
3662 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
) && count
< 2; ++i
)
3667 iter
= check_typedef (TYPE_BASECLASS (dclass
, i
));
3669 this_offset
= baseclass_offset (dclass
, i
, valaddr
, embedded_offset
,
3672 if (class_types_same_p (base
, iter
))
3674 /* If this is the first subclass, set *OFFSET and set count
3675 to 1. Otherwise, if this is at the same offset as
3676 previous instances, do nothing. Otherwise, increment
3680 *offset
= this_offset
;
3683 else if (this_offset
== *offset
)
3691 count
+= is_unique_ancestor_worker (base
, iter
, offset
,
3693 embedded_offset
+ this_offset
,
3700 /* Like is_ancestor, but only returns true if BASE is a unique base
3701 class of the type of VAL. */
3704 is_unique_ancestor (struct type
*base
, struct value
*val
)
3708 return is_unique_ancestor_worker (base
, value_type (val
), &offset
,
3709 value_contents_for_printing (val
),
3710 value_embedded_offset (val
),
3711 value_address (val
), val
) == 1;
3714 /* See gdbtypes.h. */
3717 type_byte_order (const struct type
*type
)
3719 bfd_endian byteorder
= gdbarch_byte_order (get_type_arch (type
));
3720 if (TYPE_ENDIANITY_NOT_DEFAULT (type
))
3722 if (byteorder
== BFD_ENDIAN_BIG
)
3723 return BFD_ENDIAN_LITTLE
;
3726 gdb_assert (byteorder
== BFD_ENDIAN_LITTLE
);
3727 return BFD_ENDIAN_BIG
;
3735 /* Overload resolution. */
3737 /* Return the sum of the rank of A with the rank of B. */
3740 sum_ranks (struct rank a
, struct rank b
)
3743 c
.rank
= a
.rank
+ b
.rank
;
3744 c
.subrank
= a
.subrank
+ b
.subrank
;
3748 /* Compare rank A and B and return:
3750 1 if a is better than b
3751 -1 if b is better than a. */
3754 compare_ranks (struct rank a
, struct rank b
)
3756 if (a
.rank
== b
.rank
)
3758 if (a
.subrank
== b
.subrank
)
3760 if (a
.subrank
< b
.subrank
)
3762 if (a
.subrank
> b
.subrank
)
3766 if (a
.rank
< b
.rank
)
3769 /* a.rank > b.rank */
3773 /* Functions for overload resolution begin here. */
3775 /* Compare two badness vectors A and B and return the result.
3776 0 => A and B are identical
3777 1 => A and B are incomparable
3778 2 => A is better than B
3779 3 => A is worse than B */
3782 compare_badness (const badness_vector
&a
, const badness_vector
&b
)
3786 short found_pos
= 0; /* any positives in c? */
3787 short found_neg
= 0; /* any negatives in c? */
3789 /* differing sizes => incomparable */
3790 if (a
.size () != b
.size ())
3793 /* Subtract b from a */
3794 for (i
= 0; i
< a
.size (); i
++)
3796 tmp
= compare_ranks (b
[i
], a
[i
]);
3806 return 1; /* incomparable */
3808 return 3; /* A > B */
3814 return 2; /* A < B */
3816 return 0; /* A == B */
3820 /* Rank a function by comparing its parameter types (PARMS), to the
3821 types of an argument list (ARGS). Return the badness vector. This
3822 has ARGS.size() + 1 entries. */
3825 rank_function (gdb::array_view
<type
*> parms
,
3826 gdb::array_view
<value
*> args
)
3828 /* add 1 for the length-match rank. */
3830 bv
.reserve (1 + args
.size ());
3832 /* First compare the lengths of the supplied lists.
3833 If there is a mismatch, set it to a high value. */
3835 /* pai/1997-06-03 FIXME: when we have debug info about default
3836 arguments and ellipsis parameter lists, we should consider those
3837 and rank the length-match more finely. */
3839 bv
.push_back ((args
.size () != parms
.size ())
3840 ? LENGTH_MISMATCH_BADNESS
3841 : EXACT_MATCH_BADNESS
);
3843 /* Now rank all the parameters of the candidate function. */
3844 size_t min_len
= std::min (parms
.size (), args
.size ());
3846 for (size_t i
= 0; i
< min_len
; i
++)
3847 bv
.push_back (rank_one_type (parms
[i
], value_type (args
[i
]),
3850 /* If more arguments than parameters, add dummy entries. */
3851 for (size_t i
= min_len
; i
< args
.size (); i
++)
3852 bv
.push_back (TOO_FEW_PARAMS_BADNESS
);
3857 /* Compare the names of two integer types, assuming that any sign
3858 qualifiers have been checked already. We do it this way because
3859 there may be an "int" in the name of one of the types. */
3862 integer_types_same_name_p (const char *first
, const char *second
)
3864 int first_p
, second_p
;
3866 /* If both are shorts, return 1; if neither is a short, keep
3868 first_p
= (strstr (first
, "short") != NULL
);
3869 second_p
= (strstr (second
, "short") != NULL
);
3870 if (first_p
&& second_p
)
3872 if (first_p
|| second_p
)
3875 /* Likewise for long. */
3876 first_p
= (strstr (first
, "long") != NULL
);
3877 second_p
= (strstr (second
, "long") != NULL
);
3878 if (first_p
&& second_p
)
3880 if (first_p
|| second_p
)
3883 /* Likewise for char. */
3884 first_p
= (strstr (first
, "char") != NULL
);
3885 second_p
= (strstr (second
, "char") != NULL
);
3886 if (first_p
&& second_p
)
3888 if (first_p
|| second_p
)
3891 /* They must both be ints. */
3895 /* Compares type A to type B. Returns true if they represent the same
3896 type, false otherwise. */
3899 types_equal (struct type
*a
, struct type
*b
)
3901 /* Identical type pointers. */
3902 /* However, this still doesn't catch all cases of same type for b
3903 and a. The reason is that builtin types are different from
3904 the same ones constructed from the object. */
3908 /* Resolve typedefs */
3909 if (a
->code () == TYPE_CODE_TYPEDEF
)
3910 a
= check_typedef (a
);
3911 if (b
->code () == TYPE_CODE_TYPEDEF
)
3912 b
= check_typedef (b
);
3914 /* If after resolving typedefs a and b are not of the same type
3915 code then they are not equal. */
3916 if (a
->code () != b
->code ())
3919 /* If a and b are both pointers types or both reference types then
3920 they are equal of the same type iff the objects they refer to are
3921 of the same type. */
3922 if (a
->code () == TYPE_CODE_PTR
3923 || a
->code () == TYPE_CODE_REF
)
3924 return types_equal (TYPE_TARGET_TYPE (a
),
3925 TYPE_TARGET_TYPE (b
));
3927 /* Well, damnit, if the names are exactly the same, I'll say they
3928 are exactly the same. This happens when we generate method
3929 stubs. The types won't point to the same address, but they
3930 really are the same. */
3932 if (a
->name () && b
->name ()
3933 && strcmp (a
->name (), b
->name ()) == 0)
3936 /* Check if identical after resolving typedefs. */
3940 /* Two function types are equal if their argument and return types
3942 if (a
->code () == TYPE_CODE_FUNC
)
3946 if (TYPE_NFIELDS (a
) != TYPE_NFIELDS (b
))
3949 if (!types_equal (TYPE_TARGET_TYPE (a
), TYPE_TARGET_TYPE (b
)))
3952 for (i
= 0; i
< TYPE_NFIELDS (a
); ++i
)
3953 if (!types_equal (TYPE_FIELD_TYPE (a
, i
), TYPE_FIELD_TYPE (b
, i
)))
3962 /* Deep comparison of types. */
3964 /* An entry in the type-equality bcache. */
3966 struct type_equality_entry
3968 type_equality_entry (struct type
*t1
, struct type
*t2
)
3974 struct type
*type1
, *type2
;
3977 /* A helper function to compare two strings. Returns true if they are
3978 the same, false otherwise. Handles NULLs properly. */
3981 compare_maybe_null_strings (const char *s
, const char *t
)
3983 if (s
== NULL
|| t
== NULL
)
3985 return strcmp (s
, t
) == 0;
3988 /* A helper function for check_types_worklist that checks two types for
3989 "deep" equality. Returns true if the types are considered the
3990 same, false otherwise. */
3993 check_types_equal (struct type
*type1
, struct type
*type2
,
3994 std::vector
<type_equality_entry
> *worklist
)
3996 type1
= check_typedef (type1
);
3997 type2
= check_typedef (type2
);
4002 if (type1
->code () != type2
->code ()
4003 || TYPE_LENGTH (type1
) != TYPE_LENGTH (type2
)
4004 || TYPE_UNSIGNED (type1
) != TYPE_UNSIGNED (type2
)
4005 || TYPE_NOSIGN (type1
) != TYPE_NOSIGN (type2
)
4006 || TYPE_ENDIANITY_NOT_DEFAULT (type1
) != TYPE_ENDIANITY_NOT_DEFAULT (type2
)
4007 || TYPE_VARARGS (type1
) != TYPE_VARARGS (type2
)
4008 || TYPE_VECTOR (type1
) != TYPE_VECTOR (type2
)
4009 || TYPE_NOTTEXT (type1
) != TYPE_NOTTEXT (type2
)
4010 || TYPE_INSTANCE_FLAGS (type1
) != TYPE_INSTANCE_FLAGS (type2
)
4011 || TYPE_NFIELDS (type1
) != TYPE_NFIELDS (type2
))
4014 if (!compare_maybe_null_strings (type1
->name (), type2
->name ()))
4016 if (!compare_maybe_null_strings (type1
->name (), type2
->name ()))
4019 if (type1
->code () == TYPE_CODE_RANGE
)
4021 if (*TYPE_RANGE_DATA (type1
) != *TYPE_RANGE_DATA (type2
))
4028 for (i
= 0; i
< TYPE_NFIELDS (type1
); ++i
)
4030 const struct field
*field1
= &TYPE_FIELD (type1
, i
);
4031 const struct field
*field2
= &TYPE_FIELD (type2
, i
);
4033 if (FIELD_ARTIFICIAL (*field1
) != FIELD_ARTIFICIAL (*field2
)
4034 || FIELD_BITSIZE (*field1
) != FIELD_BITSIZE (*field2
)
4035 || FIELD_LOC_KIND (*field1
) != FIELD_LOC_KIND (*field2
))
4037 if (!compare_maybe_null_strings (FIELD_NAME (*field1
),
4038 FIELD_NAME (*field2
)))
4040 switch (FIELD_LOC_KIND (*field1
))
4042 case FIELD_LOC_KIND_BITPOS
:
4043 if (FIELD_BITPOS (*field1
) != FIELD_BITPOS (*field2
))
4046 case FIELD_LOC_KIND_ENUMVAL
:
4047 if (FIELD_ENUMVAL (*field1
) != FIELD_ENUMVAL (*field2
))
4050 case FIELD_LOC_KIND_PHYSADDR
:
4051 if (FIELD_STATIC_PHYSADDR (*field1
)
4052 != FIELD_STATIC_PHYSADDR (*field2
))
4055 case FIELD_LOC_KIND_PHYSNAME
:
4056 if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1
),
4057 FIELD_STATIC_PHYSNAME (*field2
)))
4060 case FIELD_LOC_KIND_DWARF_BLOCK
:
4062 struct dwarf2_locexpr_baton
*block1
, *block2
;
4064 block1
= FIELD_DWARF_BLOCK (*field1
);
4065 block2
= FIELD_DWARF_BLOCK (*field2
);
4066 if (block1
->per_cu
!= block2
->per_cu
4067 || block1
->size
!= block2
->size
4068 || memcmp (block1
->data
, block2
->data
, block1
->size
) != 0)
4073 internal_error (__FILE__
, __LINE__
, _("Unsupported field kind "
4074 "%d by check_types_equal"),
4075 FIELD_LOC_KIND (*field1
));
4078 worklist
->emplace_back (FIELD_TYPE (*field1
), FIELD_TYPE (*field2
));
4082 if (TYPE_TARGET_TYPE (type1
) != NULL
)
4084 if (TYPE_TARGET_TYPE (type2
) == NULL
)
4087 worklist
->emplace_back (TYPE_TARGET_TYPE (type1
),
4088 TYPE_TARGET_TYPE (type2
));
4090 else if (TYPE_TARGET_TYPE (type2
) != NULL
)
4096 /* Check types on a worklist for equality. Returns false if any pair
4097 is not equal, true if they are all considered equal. */
4100 check_types_worklist (std::vector
<type_equality_entry
> *worklist
,
4103 while (!worklist
->empty ())
4107 struct type_equality_entry entry
= std::move (worklist
->back ());
4108 worklist
->pop_back ();
4110 /* If the type pair has already been visited, we know it is
4112 cache
->insert (&entry
, sizeof (entry
), &added
);
4116 if (!check_types_equal (entry
.type1
, entry
.type2
, worklist
))
4123 /* Return true if types TYPE1 and TYPE2 are equal, as determined by a
4124 "deep comparison". Otherwise return false. */
4127 types_deeply_equal (struct type
*type1
, struct type
*type2
)
4129 std::vector
<type_equality_entry
> worklist
;
4131 gdb_assert (type1
!= NULL
&& type2
!= NULL
);
4133 /* Early exit for the simple case. */
4137 gdb::bcache
cache (nullptr, nullptr);
4138 worklist
.emplace_back (type1
, type2
);
4139 return check_types_worklist (&worklist
, &cache
);
4142 /* Allocated status of type TYPE. Return zero if type TYPE is allocated.
4143 Otherwise return one. */
4146 type_not_allocated (const struct type
*type
)
4148 struct dynamic_prop
*prop
= TYPE_ALLOCATED_PROP (type
);
4150 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
4151 && !TYPE_DYN_PROP_ADDR (prop
));
4154 /* Associated status of type TYPE. Return zero if type TYPE is associated.
4155 Otherwise return one. */
4158 type_not_associated (const struct type
*type
)
4160 struct dynamic_prop
*prop
= TYPE_ASSOCIATED_PROP (type
);
4162 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
4163 && !TYPE_DYN_PROP_ADDR (prop
));
4166 /* rank_one_type helper for when PARM's type code is TYPE_CODE_PTR. */
4169 rank_one_type_parm_ptr (struct type
*parm
, struct type
*arg
, struct value
*value
)
4171 struct rank rank
= {0,0};
4173 switch (arg
->code ())
4177 /* Allowed pointer conversions are:
4178 (a) pointer to void-pointer conversion. */
4179 if (TYPE_TARGET_TYPE (parm
)->code () == TYPE_CODE_VOID
)
4180 return VOID_PTR_CONVERSION_BADNESS
;
4182 /* (b) pointer to ancestor-pointer conversion. */
4183 rank
.subrank
= distance_to_ancestor (TYPE_TARGET_TYPE (parm
),
4184 TYPE_TARGET_TYPE (arg
),
4186 if (rank
.subrank
>= 0)
4187 return sum_ranks (BASE_PTR_CONVERSION_BADNESS
, rank
);
4189 return INCOMPATIBLE_TYPE_BADNESS
;
4190 case TYPE_CODE_ARRAY
:
4192 struct type
*t1
= TYPE_TARGET_TYPE (parm
);
4193 struct type
*t2
= TYPE_TARGET_TYPE (arg
);
4195 if (types_equal (t1
, t2
))
4197 /* Make sure they are CV equal. */
4198 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4199 rank
.subrank
|= CV_CONVERSION_CONST
;
4200 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4201 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4202 if (rank
.subrank
!= 0)
4203 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4204 return EXACT_MATCH_BADNESS
;
4206 return INCOMPATIBLE_TYPE_BADNESS
;
4208 case TYPE_CODE_FUNC
:
4209 return rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
);
4211 if (value
!= NULL
&& value_type (value
)->code () == TYPE_CODE_INT
)
4213 if (value_as_long (value
) == 0)
4215 /* Null pointer conversion: allow it to be cast to a pointer.
4216 [4.10.1 of C++ standard draft n3290] */
4217 return NULL_POINTER_CONVERSION_BADNESS
;
4221 /* If type checking is disabled, allow the conversion. */
4222 if (!strict_type_checking
)
4223 return NS_INTEGER_POINTER_CONVERSION_BADNESS
;
4227 case TYPE_CODE_ENUM
:
4228 case TYPE_CODE_FLAGS
:
4229 case TYPE_CODE_CHAR
:
4230 case TYPE_CODE_RANGE
:
4231 case TYPE_CODE_BOOL
:
4233 return INCOMPATIBLE_TYPE_BADNESS
;
4237 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ARRAY. */
4240 rank_one_type_parm_array (struct type
*parm
, struct type
*arg
, struct value
*value
)
4242 switch (arg
->code ())
4245 case TYPE_CODE_ARRAY
:
4246 return rank_one_type (TYPE_TARGET_TYPE (parm
),
4247 TYPE_TARGET_TYPE (arg
), NULL
);
4249 return INCOMPATIBLE_TYPE_BADNESS
;
4253 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FUNC. */
4256 rank_one_type_parm_func (struct type
*parm
, struct type
*arg
, struct value
*value
)
4258 switch (arg
->code ())
4260 case TYPE_CODE_PTR
: /* funcptr -> func */
4261 return rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
);
4263 return INCOMPATIBLE_TYPE_BADNESS
;
4267 /* rank_one_type helper for when PARM's type code is TYPE_CODE_INT. */
4270 rank_one_type_parm_int (struct type
*parm
, struct type
*arg
, struct value
*value
)
4272 switch (arg
->code ())
4275 if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4277 /* Deal with signed, unsigned, and plain chars and
4278 signed and unsigned ints. */
4279 if (TYPE_NOSIGN (parm
))
4281 /* This case only for character types. */
4282 if (TYPE_NOSIGN (arg
))
4283 return EXACT_MATCH_BADNESS
; /* plain char -> plain char */
4284 else /* signed/unsigned char -> plain char */
4285 return INTEGER_CONVERSION_BADNESS
;
4287 else if (TYPE_UNSIGNED (parm
))
4289 if (TYPE_UNSIGNED (arg
))
4291 /* unsigned int -> unsigned int, or
4292 unsigned long -> unsigned long */
4293 if (integer_types_same_name_p (parm
->name (),
4295 return EXACT_MATCH_BADNESS
;
4296 else if (integer_types_same_name_p (arg
->name (),
4298 && integer_types_same_name_p (parm
->name (),
4300 /* unsigned int -> unsigned long */
4301 return INTEGER_PROMOTION_BADNESS
;
4303 /* unsigned long -> unsigned int */
4304 return INTEGER_CONVERSION_BADNESS
;
4308 if (integer_types_same_name_p (arg
->name (),
4310 && integer_types_same_name_p (parm
->name (),
4312 /* signed long -> unsigned int */
4313 return INTEGER_CONVERSION_BADNESS
;
4315 /* signed int/long -> unsigned int/long */
4316 return INTEGER_CONVERSION_BADNESS
;
4319 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
4321 if (integer_types_same_name_p (parm
->name (),
4323 return EXACT_MATCH_BADNESS
;
4324 else if (integer_types_same_name_p (arg
->name (),
4326 && integer_types_same_name_p (parm
->name (),
4328 return INTEGER_PROMOTION_BADNESS
;
4330 return INTEGER_CONVERSION_BADNESS
;
4333 return INTEGER_CONVERSION_BADNESS
;
4335 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4336 return INTEGER_PROMOTION_BADNESS
;
4338 return INTEGER_CONVERSION_BADNESS
;
4339 case TYPE_CODE_ENUM
:
4340 case TYPE_CODE_FLAGS
:
4341 case TYPE_CODE_CHAR
:
4342 case TYPE_CODE_RANGE
:
4343 case TYPE_CODE_BOOL
:
4344 if (TYPE_DECLARED_CLASS (arg
))
4345 return INCOMPATIBLE_TYPE_BADNESS
;
4346 return INTEGER_PROMOTION_BADNESS
;
4348 return INT_FLOAT_CONVERSION_BADNESS
;
4350 return NS_POINTER_CONVERSION_BADNESS
;
4352 return INCOMPATIBLE_TYPE_BADNESS
;
4356 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ENUM. */
4359 rank_one_type_parm_enum (struct type
*parm
, struct type
*arg
, struct value
*value
)
4361 switch (arg
->code ())
4364 case TYPE_CODE_CHAR
:
4365 case TYPE_CODE_RANGE
:
4366 case TYPE_CODE_BOOL
:
4367 case TYPE_CODE_ENUM
:
4368 if (TYPE_DECLARED_CLASS (parm
) || TYPE_DECLARED_CLASS (arg
))
4369 return INCOMPATIBLE_TYPE_BADNESS
;
4370 return INTEGER_CONVERSION_BADNESS
;
4372 return INT_FLOAT_CONVERSION_BADNESS
;
4374 return INCOMPATIBLE_TYPE_BADNESS
;
4378 /* rank_one_type helper for when PARM's type code is TYPE_CODE_CHAR. */
4381 rank_one_type_parm_char (struct type
*parm
, struct type
*arg
, struct value
*value
)
4383 switch (arg
->code ())
4385 case TYPE_CODE_RANGE
:
4386 case TYPE_CODE_BOOL
:
4387 case TYPE_CODE_ENUM
:
4388 if (TYPE_DECLARED_CLASS (arg
))
4389 return INCOMPATIBLE_TYPE_BADNESS
;
4390 return INTEGER_CONVERSION_BADNESS
;
4392 return INT_FLOAT_CONVERSION_BADNESS
;
4394 if (TYPE_LENGTH (arg
) > TYPE_LENGTH (parm
))
4395 return INTEGER_CONVERSION_BADNESS
;
4396 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4397 return INTEGER_PROMOTION_BADNESS
;
4399 case TYPE_CODE_CHAR
:
4400 /* Deal with signed, unsigned, and plain chars for C++ and
4401 with int cases falling through from previous case. */
4402 if (TYPE_NOSIGN (parm
))
4404 if (TYPE_NOSIGN (arg
))
4405 return EXACT_MATCH_BADNESS
;
4407 return INTEGER_CONVERSION_BADNESS
;
4409 else if (TYPE_UNSIGNED (parm
))
4411 if (TYPE_UNSIGNED (arg
))
4412 return EXACT_MATCH_BADNESS
;
4414 return INTEGER_PROMOTION_BADNESS
;
4416 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
4417 return EXACT_MATCH_BADNESS
;
4419 return INTEGER_CONVERSION_BADNESS
;
4421 return INCOMPATIBLE_TYPE_BADNESS
;
4425 /* rank_one_type helper for when PARM's type code is TYPE_CODE_RANGE. */
4428 rank_one_type_parm_range (struct type
*parm
, struct type
*arg
, struct value
*value
)
4430 switch (arg
->code ())
4433 case TYPE_CODE_CHAR
:
4434 case TYPE_CODE_RANGE
:
4435 case TYPE_CODE_BOOL
:
4436 case TYPE_CODE_ENUM
:
4437 return INTEGER_CONVERSION_BADNESS
;
4439 return INT_FLOAT_CONVERSION_BADNESS
;
4441 return INCOMPATIBLE_TYPE_BADNESS
;
4445 /* rank_one_type helper for when PARM's type code is TYPE_CODE_BOOL. */
4448 rank_one_type_parm_bool (struct type
*parm
, struct type
*arg
, struct value
*value
)
4450 switch (arg
->code ())
4452 /* n3290 draft, section 4.12.1 (conv.bool):
4454 "A prvalue of arithmetic, unscoped enumeration, pointer, or
4455 pointer to member type can be converted to a prvalue of type
4456 bool. A zero value, null pointer value, or null member pointer
4457 value is converted to false; any other value is converted to
4458 true. A prvalue of type std::nullptr_t can be converted to a
4459 prvalue of type bool; the resulting value is false." */
4461 case TYPE_CODE_CHAR
:
4462 case TYPE_CODE_ENUM
:
4464 case TYPE_CODE_MEMBERPTR
:
4466 return BOOL_CONVERSION_BADNESS
;
4467 case TYPE_CODE_RANGE
:
4468 return INCOMPATIBLE_TYPE_BADNESS
;
4469 case TYPE_CODE_BOOL
:
4470 return EXACT_MATCH_BADNESS
;
4472 return INCOMPATIBLE_TYPE_BADNESS
;
4476 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FLOAT. */
4479 rank_one_type_parm_float (struct type
*parm
, struct type
*arg
, struct value
*value
)
4481 switch (arg
->code ())
4484 if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4485 return FLOAT_PROMOTION_BADNESS
;
4486 else if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4487 return EXACT_MATCH_BADNESS
;
4489 return FLOAT_CONVERSION_BADNESS
;
4491 case TYPE_CODE_BOOL
:
4492 case TYPE_CODE_ENUM
:
4493 case TYPE_CODE_RANGE
:
4494 case TYPE_CODE_CHAR
:
4495 return INT_FLOAT_CONVERSION_BADNESS
;
4497 return INCOMPATIBLE_TYPE_BADNESS
;
4501 /* rank_one_type helper for when PARM's type code is TYPE_CODE_COMPLEX. */
4504 rank_one_type_parm_complex (struct type
*parm
, struct type
*arg
, struct value
*value
)
4506 switch (arg
->code ())
4507 { /* Strictly not needed for C++, but... */
4509 return FLOAT_PROMOTION_BADNESS
;
4510 case TYPE_CODE_COMPLEX
:
4511 return EXACT_MATCH_BADNESS
;
4513 return INCOMPATIBLE_TYPE_BADNESS
;
4517 /* rank_one_type helper for when PARM's type code is TYPE_CODE_STRUCT. */
4520 rank_one_type_parm_struct (struct type
*parm
, struct type
*arg
, struct value
*value
)
4522 struct rank rank
= {0, 0};
4524 switch (arg
->code ())
4526 case TYPE_CODE_STRUCT
:
4527 /* Check for derivation */
4528 rank
.subrank
= distance_to_ancestor (parm
, arg
, 0);
4529 if (rank
.subrank
>= 0)
4530 return sum_ranks (BASE_CONVERSION_BADNESS
, rank
);
4533 return INCOMPATIBLE_TYPE_BADNESS
;
4537 /* rank_one_type helper for when PARM's type code is TYPE_CODE_SET. */
4540 rank_one_type_parm_set (struct type
*parm
, struct type
*arg
, struct value
*value
)
4542 switch (arg
->code ())
4546 return rank_one_type (TYPE_FIELD_TYPE (parm
, 0),
4547 TYPE_FIELD_TYPE (arg
, 0), NULL
);
4549 return INCOMPATIBLE_TYPE_BADNESS
;
4553 /* Compare one type (PARM) for compatibility with another (ARG).
4554 * PARM is intended to be the parameter type of a function; and
4555 * ARG is the supplied argument's type. This function tests if
4556 * the latter can be converted to the former.
4557 * VALUE is the argument's value or NULL if none (or called recursively)
4559 * Return 0 if they are identical types;
4560 * Otherwise, return an integer which corresponds to how compatible
4561 * PARM is to ARG. The higher the return value, the worse the match.
4562 * Generally the "bad" conversions are all uniformly assigned a 100. */
4565 rank_one_type (struct type
*parm
, struct type
*arg
, struct value
*value
)
4567 struct rank rank
= {0,0};
4569 /* Resolve typedefs */
4570 if (parm
->code () == TYPE_CODE_TYPEDEF
)
4571 parm
= check_typedef (parm
);
4572 if (arg
->code () == TYPE_CODE_TYPEDEF
)
4573 arg
= check_typedef (arg
);
4575 if (TYPE_IS_REFERENCE (parm
) && value
!= NULL
)
4577 if (VALUE_LVAL (value
) == not_lval
)
4579 /* Rvalues should preferably bind to rvalue references or const
4580 lvalue references. */
4581 if (parm
->code () == TYPE_CODE_RVALUE_REF
)
4582 rank
.subrank
= REFERENCE_CONVERSION_RVALUE
;
4583 else if (TYPE_CONST (TYPE_TARGET_TYPE (parm
)))
4584 rank
.subrank
= REFERENCE_CONVERSION_CONST_LVALUE
;
4586 return INCOMPATIBLE_TYPE_BADNESS
;
4587 return sum_ranks (rank
, REFERENCE_CONVERSION_BADNESS
);
4591 /* It's illegal to pass an lvalue as an rvalue. */
4592 if (parm
->code () == TYPE_CODE_RVALUE_REF
)
4593 return INCOMPATIBLE_TYPE_BADNESS
;
4597 if (types_equal (parm
, arg
))
4599 struct type
*t1
= parm
;
4600 struct type
*t2
= arg
;
4602 /* For pointers and references, compare target type. */
4603 if (parm
->code () == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (parm
))
4605 t1
= TYPE_TARGET_TYPE (parm
);
4606 t2
= TYPE_TARGET_TYPE (arg
);
4609 /* Make sure they are CV equal, too. */
4610 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4611 rank
.subrank
|= CV_CONVERSION_CONST
;
4612 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4613 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4614 if (rank
.subrank
!= 0)
4615 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4616 return EXACT_MATCH_BADNESS
;
4619 /* See through references, since we can almost make non-references
4622 if (TYPE_IS_REFERENCE (arg
))
4623 return (sum_ranks (rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
),
4624 REFERENCE_SEE_THROUGH_BADNESS
));
4625 if (TYPE_IS_REFERENCE (parm
))
4626 return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
),
4627 REFERENCE_SEE_THROUGH_BADNESS
));
4629 /* Debugging only. */
4630 fprintf_filtered (gdb_stderr
,
4631 "------ Arg is %s [%d], parm is %s [%d]\n",
4632 arg
->name (), arg
->code (),
4633 parm
->name (), parm
->code ());
4635 /* x -> y means arg of type x being supplied for parameter of type y. */
4637 switch (parm
->code ())
4640 return rank_one_type_parm_ptr (parm
, arg
, value
);
4641 case TYPE_CODE_ARRAY
:
4642 return rank_one_type_parm_array (parm
, arg
, value
);
4643 case TYPE_CODE_FUNC
:
4644 return rank_one_type_parm_func (parm
, arg
, value
);
4646 return rank_one_type_parm_int (parm
, arg
, value
);
4647 case TYPE_CODE_ENUM
:
4648 return rank_one_type_parm_enum (parm
, arg
, value
);
4649 case TYPE_CODE_CHAR
:
4650 return rank_one_type_parm_char (parm
, arg
, value
);
4651 case TYPE_CODE_RANGE
:
4652 return rank_one_type_parm_range (parm
, arg
, value
);
4653 case TYPE_CODE_BOOL
:
4654 return rank_one_type_parm_bool (parm
, arg
, value
);
4656 return rank_one_type_parm_float (parm
, arg
, value
);
4657 case TYPE_CODE_COMPLEX
:
4658 return rank_one_type_parm_complex (parm
, arg
, value
);
4659 case TYPE_CODE_STRUCT
:
4660 return rank_one_type_parm_struct (parm
, arg
, value
);
4662 return rank_one_type_parm_set (parm
, arg
, value
);
4664 return INCOMPATIBLE_TYPE_BADNESS
;
4665 } /* switch (arg->code ()) */
4668 /* End of functions for overload resolution. */
4670 /* Routines to pretty-print types. */
4673 print_bit_vector (B_TYPE
*bits
, int nbits
)
4677 for (bitno
= 0; bitno
< nbits
; bitno
++)
4679 if ((bitno
% 8) == 0)
4681 puts_filtered (" ");
4683 if (B_TST (bits
, bitno
))
4684 printf_filtered (("1"));
4686 printf_filtered (("0"));
4690 /* Note the first arg should be the "this" pointer, we may not want to
4691 include it since we may get into a infinitely recursive
4695 print_args (struct field
*args
, int nargs
, int spaces
)
4701 for (i
= 0; i
< nargs
; i
++)
4703 printfi_filtered (spaces
, "[%d] name '%s'\n", i
,
4704 args
[i
].name
!= NULL
? args
[i
].name
: "<NULL>");
4705 recursive_dump_type (args
[i
].type
, spaces
+ 2);
4711 field_is_static (struct field
*f
)
4713 /* "static" fields are the fields whose location is not relative
4714 to the address of the enclosing struct. It would be nice to
4715 have a dedicated flag that would be set for static fields when
4716 the type is being created. But in practice, checking the field
4717 loc_kind should give us an accurate answer. */
4718 return (FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSNAME
4719 || FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSADDR
);
4723 dump_fn_fieldlists (struct type
*type
, int spaces
)
4729 printfi_filtered (spaces
, "fn_fieldlists ");
4730 gdb_print_host_address (TYPE_FN_FIELDLISTS (type
), gdb_stdout
);
4731 printf_filtered ("\n");
4732 for (method_idx
= 0; method_idx
< TYPE_NFN_FIELDS (type
); method_idx
++)
4734 f
= TYPE_FN_FIELDLIST1 (type
, method_idx
);
4735 printfi_filtered (spaces
+ 2, "[%d] name '%s' (",
4737 TYPE_FN_FIELDLIST_NAME (type
, method_idx
));
4738 gdb_print_host_address (TYPE_FN_FIELDLIST_NAME (type
, method_idx
),
4740 printf_filtered (_(") length %d\n"),
4741 TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
));
4742 for (overload_idx
= 0;
4743 overload_idx
< TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
);
4746 printfi_filtered (spaces
+ 4, "[%d] physname '%s' (",
4748 TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
));
4749 gdb_print_host_address (TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
),
4751 printf_filtered (")\n");
4752 printfi_filtered (spaces
+ 8, "type ");
4753 gdb_print_host_address (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4755 printf_filtered ("\n");
4757 recursive_dump_type (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4760 printfi_filtered (spaces
+ 8, "args ");
4761 gdb_print_host_address (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4763 printf_filtered ("\n");
4764 print_args (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4765 TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f
, overload_idx
)),
4767 printfi_filtered (spaces
+ 8, "fcontext ");
4768 gdb_print_host_address (TYPE_FN_FIELD_FCONTEXT (f
, overload_idx
),
4770 printf_filtered ("\n");
4772 printfi_filtered (spaces
+ 8, "is_const %d\n",
4773 TYPE_FN_FIELD_CONST (f
, overload_idx
));
4774 printfi_filtered (spaces
+ 8, "is_volatile %d\n",
4775 TYPE_FN_FIELD_VOLATILE (f
, overload_idx
));
4776 printfi_filtered (spaces
+ 8, "is_private %d\n",
4777 TYPE_FN_FIELD_PRIVATE (f
, overload_idx
));
4778 printfi_filtered (spaces
+ 8, "is_protected %d\n",
4779 TYPE_FN_FIELD_PROTECTED (f
, overload_idx
));
4780 printfi_filtered (spaces
+ 8, "is_stub %d\n",
4781 TYPE_FN_FIELD_STUB (f
, overload_idx
));
4782 printfi_filtered (spaces
+ 8, "defaulted %d\n",
4783 TYPE_FN_FIELD_DEFAULTED (f
, overload_idx
));
4784 printfi_filtered (spaces
+ 8, "is_deleted %d\n",
4785 TYPE_FN_FIELD_DELETED (f
, overload_idx
));
4786 printfi_filtered (spaces
+ 8, "voffset %u\n",
4787 TYPE_FN_FIELD_VOFFSET (f
, overload_idx
));
4793 print_cplus_stuff (struct type
*type
, int spaces
)
4795 printfi_filtered (spaces
, "vptr_fieldno %d\n", TYPE_VPTR_FIELDNO (type
));
4796 printfi_filtered (spaces
, "vptr_basetype ");
4797 gdb_print_host_address (TYPE_VPTR_BASETYPE (type
), gdb_stdout
);
4798 puts_filtered ("\n");
4799 if (TYPE_VPTR_BASETYPE (type
) != NULL
)
4800 recursive_dump_type (TYPE_VPTR_BASETYPE (type
), spaces
+ 2);
4802 printfi_filtered (spaces
, "n_baseclasses %d\n",
4803 TYPE_N_BASECLASSES (type
));
4804 printfi_filtered (spaces
, "nfn_fields %d\n",
4805 TYPE_NFN_FIELDS (type
));
4806 if (TYPE_N_BASECLASSES (type
) > 0)
4808 printfi_filtered (spaces
, "virtual_field_bits (%d bits at *",
4809 TYPE_N_BASECLASSES (type
));
4810 gdb_print_host_address (TYPE_FIELD_VIRTUAL_BITS (type
),
4812 printf_filtered (")");
4814 print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type
),
4815 TYPE_N_BASECLASSES (type
));
4816 puts_filtered ("\n");
4818 if (TYPE_NFIELDS (type
) > 0)
4820 if (TYPE_FIELD_PRIVATE_BITS (type
) != NULL
)
4822 printfi_filtered (spaces
,
4823 "private_field_bits (%d bits at *",
4824 TYPE_NFIELDS (type
));
4825 gdb_print_host_address (TYPE_FIELD_PRIVATE_BITS (type
),
4827 printf_filtered (")");
4828 print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type
),
4829 TYPE_NFIELDS (type
));
4830 puts_filtered ("\n");
4832 if (TYPE_FIELD_PROTECTED_BITS (type
) != NULL
)
4834 printfi_filtered (spaces
,
4835 "protected_field_bits (%d bits at *",
4836 TYPE_NFIELDS (type
));
4837 gdb_print_host_address (TYPE_FIELD_PROTECTED_BITS (type
),
4839 printf_filtered (")");
4840 print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type
),
4841 TYPE_NFIELDS (type
));
4842 puts_filtered ("\n");
4845 if (TYPE_NFN_FIELDS (type
) > 0)
4847 dump_fn_fieldlists (type
, spaces
);
4850 printfi_filtered (spaces
, "calling_convention %d\n",
4851 TYPE_CPLUS_CALLING_CONVENTION (type
));
4854 /* Print the contents of the TYPE's type_specific union, assuming that
4855 its type-specific kind is TYPE_SPECIFIC_GNAT_STUFF. */
4858 print_gnat_stuff (struct type
*type
, int spaces
)
4860 struct type
*descriptive_type
= TYPE_DESCRIPTIVE_TYPE (type
);
4862 if (descriptive_type
== NULL
)
4863 printfi_filtered (spaces
+ 2, "no descriptive type\n");
4866 printfi_filtered (spaces
+ 2, "descriptive type\n");
4867 recursive_dump_type (descriptive_type
, spaces
+ 4);
4871 static struct obstack dont_print_type_obstack
;
4874 recursive_dump_type (struct type
*type
, int spaces
)
4879 obstack_begin (&dont_print_type_obstack
, 0);
4881 if (TYPE_NFIELDS (type
) > 0
4882 || (HAVE_CPLUS_STRUCT (type
) && TYPE_NFN_FIELDS (type
) > 0))
4884 struct type
**first_dont_print
4885 = (struct type
**) obstack_base (&dont_print_type_obstack
);
4887 int i
= (struct type
**)
4888 obstack_next_free (&dont_print_type_obstack
) - first_dont_print
;
4892 if (type
== first_dont_print
[i
])
4894 printfi_filtered (spaces
, "type node ");
4895 gdb_print_host_address (type
, gdb_stdout
);
4896 printf_filtered (_(" <same as already seen type>\n"));
4901 obstack_ptr_grow (&dont_print_type_obstack
, type
);
4904 printfi_filtered (spaces
, "type node ");
4905 gdb_print_host_address (type
, gdb_stdout
);
4906 printf_filtered ("\n");
4907 printfi_filtered (spaces
, "name '%s' (",
4908 type
->name () ? type
->name () : "<NULL>");
4909 gdb_print_host_address (type
->name (), gdb_stdout
);
4910 printf_filtered (")\n");
4911 printfi_filtered (spaces
, "code 0x%x ", type
->code ());
4912 switch (type
->code ())
4914 case TYPE_CODE_UNDEF
:
4915 printf_filtered ("(TYPE_CODE_UNDEF)");
4918 printf_filtered ("(TYPE_CODE_PTR)");
4920 case TYPE_CODE_ARRAY
:
4921 printf_filtered ("(TYPE_CODE_ARRAY)");
4923 case TYPE_CODE_STRUCT
:
4924 printf_filtered ("(TYPE_CODE_STRUCT)");
4926 case TYPE_CODE_UNION
:
4927 printf_filtered ("(TYPE_CODE_UNION)");
4929 case TYPE_CODE_ENUM
:
4930 printf_filtered ("(TYPE_CODE_ENUM)");
4932 case TYPE_CODE_FLAGS
:
4933 printf_filtered ("(TYPE_CODE_FLAGS)");
4935 case TYPE_CODE_FUNC
:
4936 printf_filtered ("(TYPE_CODE_FUNC)");
4939 printf_filtered ("(TYPE_CODE_INT)");
4942 printf_filtered ("(TYPE_CODE_FLT)");
4944 case TYPE_CODE_VOID
:
4945 printf_filtered ("(TYPE_CODE_VOID)");
4948 printf_filtered ("(TYPE_CODE_SET)");
4950 case TYPE_CODE_RANGE
:
4951 printf_filtered ("(TYPE_CODE_RANGE)");
4953 case TYPE_CODE_STRING
:
4954 printf_filtered ("(TYPE_CODE_STRING)");
4956 case TYPE_CODE_ERROR
:
4957 printf_filtered ("(TYPE_CODE_ERROR)");
4959 case TYPE_CODE_MEMBERPTR
:
4960 printf_filtered ("(TYPE_CODE_MEMBERPTR)");
4962 case TYPE_CODE_METHODPTR
:
4963 printf_filtered ("(TYPE_CODE_METHODPTR)");
4965 case TYPE_CODE_METHOD
:
4966 printf_filtered ("(TYPE_CODE_METHOD)");
4969 printf_filtered ("(TYPE_CODE_REF)");
4971 case TYPE_CODE_CHAR
:
4972 printf_filtered ("(TYPE_CODE_CHAR)");
4974 case TYPE_CODE_BOOL
:
4975 printf_filtered ("(TYPE_CODE_BOOL)");
4977 case TYPE_CODE_COMPLEX
:
4978 printf_filtered ("(TYPE_CODE_COMPLEX)");
4980 case TYPE_CODE_TYPEDEF
:
4981 printf_filtered ("(TYPE_CODE_TYPEDEF)");
4983 case TYPE_CODE_NAMESPACE
:
4984 printf_filtered ("(TYPE_CODE_NAMESPACE)");
4987 printf_filtered ("(UNKNOWN TYPE CODE)");
4990 puts_filtered ("\n");
4991 printfi_filtered (spaces
, "length %s\n", pulongest (TYPE_LENGTH (type
)));
4992 if (TYPE_OBJFILE_OWNED (type
))
4994 printfi_filtered (spaces
, "objfile ");
4995 gdb_print_host_address (TYPE_OWNER (type
).objfile
, gdb_stdout
);
4999 printfi_filtered (spaces
, "gdbarch ");
5000 gdb_print_host_address (TYPE_OWNER (type
).gdbarch
, gdb_stdout
);
5002 printf_filtered ("\n");
5003 printfi_filtered (spaces
, "target_type ");
5004 gdb_print_host_address (TYPE_TARGET_TYPE (type
), gdb_stdout
);
5005 printf_filtered ("\n");
5006 if (TYPE_TARGET_TYPE (type
) != NULL
)
5008 recursive_dump_type (TYPE_TARGET_TYPE (type
), spaces
+ 2);
5010 printfi_filtered (spaces
, "pointer_type ");
5011 gdb_print_host_address (TYPE_POINTER_TYPE (type
), gdb_stdout
);
5012 printf_filtered ("\n");
5013 printfi_filtered (spaces
, "reference_type ");
5014 gdb_print_host_address (TYPE_REFERENCE_TYPE (type
), gdb_stdout
);
5015 printf_filtered ("\n");
5016 printfi_filtered (spaces
, "type_chain ");
5017 gdb_print_host_address (TYPE_CHAIN (type
), gdb_stdout
);
5018 printf_filtered ("\n");
5019 printfi_filtered (spaces
, "instance_flags 0x%x",
5020 TYPE_INSTANCE_FLAGS (type
));
5021 if (TYPE_CONST (type
))
5023 puts_filtered (" TYPE_CONST");
5025 if (TYPE_VOLATILE (type
))
5027 puts_filtered (" TYPE_VOLATILE");
5029 if (TYPE_CODE_SPACE (type
))
5031 puts_filtered (" TYPE_CODE_SPACE");
5033 if (TYPE_DATA_SPACE (type
))
5035 puts_filtered (" TYPE_DATA_SPACE");
5037 if (TYPE_ADDRESS_CLASS_1 (type
))
5039 puts_filtered (" TYPE_ADDRESS_CLASS_1");
5041 if (TYPE_ADDRESS_CLASS_2 (type
))
5043 puts_filtered (" TYPE_ADDRESS_CLASS_2");
5045 if (TYPE_RESTRICT (type
))
5047 puts_filtered (" TYPE_RESTRICT");
5049 if (TYPE_ATOMIC (type
))
5051 puts_filtered (" TYPE_ATOMIC");
5053 puts_filtered ("\n");
5055 printfi_filtered (spaces
, "flags");
5056 if (TYPE_UNSIGNED (type
))
5058 puts_filtered (" TYPE_UNSIGNED");
5060 if (TYPE_NOSIGN (type
))
5062 puts_filtered (" TYPE_NOSIGN");
5064 if (TYPE_ENDIANITY_NOT_DEFAULT (type
))
5066 puts_filtered (" TYPE_ENDIANITY_NOT_DEFAULT");
5068 if (TYPE_STUB (type
))
5070 puts_filtered (" TYPE_STUB");
5072 if (TYPE_TARGET_STUB (type
))
5074 puts_filtered (" TYPE_TARGET_STUB");
5076 if (TYPE_PROTOTYPED (type
))
5078 puts_filtered (" TYPE_PROTOTYPED");
5080 if (TYPE_VARARGS (type
))
5082 puts_filtered (" TYPE_VARARGS");
5084 /* This is used for things like AltiVec registers on ppc. Gcc emits
5085 an attribute for the array type, which tells whether or not we
5086 have a vector, instead of a regular array. */
5087 if (TYPE_VECTOR (type
))
5089 puts_filtered (" TYPE_VECTOR");
5091 if (TYPE_FIXED_INSTANCE (type
))
5093 puts_filtered (" TYPE_FIXED_INSTANCE");
5095 if (TYPE_STUB_SUPPORTED (type
))
5097 puts_filtered (" TYPE_STUB_SUPPORTED");
5099 if (TYPE_NOTTEXT (type
))
5101 puts_filtered (" TYPE_NOTTEXT");
5103 puts_filtered ("\n");
5104 printfi_filtered (spaces
, "nfields %d ", TYPE_NFIELDS (type
));
5105 gdb_print_host_address (TYPE_FIELDS (type
), gdb_stdout
);
5106 puts_filtered ("\n");
5107 for (idx
= 0; idx
< TYPE_NFIELDS (type
); idx
++)
5109 if (type
->code () == TYPE_CODE_ENUM
)
5110 printfi_filtered (spaces
+ 2,
5111 "[%d] enumval %s type ",
5112 idx
, plongest (TYPE_FIELD_ENUMVAL (type
, idx
)));
5114 printfi_filtered (spaces
+ 2,
5115 "[%d] bitpos %s bitsize %d type ",
5116 idx
, plongest (TYPE_FIELD_BITPOS (type
, idx
)),
5117 TYPE_FIELD_BITSIZE (type
, idx
));
5118 gdb_print_host_address (TYPE_FIELD_TYPE (type
, idx
), gdb_stdout
);
5119 printf_filtered (" name '%s' (",
5120 TYPE_FIELD_NAME (type
, idx
) != NULL
5121 ? TYPE_FIELD_NAME (type
, idx
)
5123 gdb_print_host_address (TYPE_FIELD_NAME (type
, idx
), gdb_stdout
);
5124 printf_filtered (")\n");
5125 if (TYPE_FIELD_TYPE (type
, idx
) != NULL
)
5127 recursive_dump_type (TYPE_FIELD_TYPE (type
, idx
), spaces
+ 4);
5130 if (type
->code () == TYPE_CODE_RANGE
)
5132 printfi_filtered (spaces
, "low %s%s high %s%s\n",
5133 plongest (TYPE_LOW_BOUND (type
)),
5134 TYPE_LOW_BOUND_UNDEFINED (type
) ? " (undefined)" : "",
5135 plongest (TYPE_HIGH_BOUND (type
)),
5136 TYPE_HIGH_BOUND_UNDEFINED (type
)
5137 ? " (undefined)" : "");
5140 switch (TYPE_SPECIFIC_FIELD (type
))
5142 case TYPE_SPECIFIC_CPLUS_STUFF
:
5143 printfi_filtered (spaces
, "cplus_stuff ");
5144 gdb_print_host_address (TYPE_CPLUS_SPECIFIC (type
),
5146 puts_filtered ("\n");
5147 print_cplus_stuff (type
, spaces
);
5150 case TYPE_SPECIFIC_GNAT_STUFF
:
5151 printfi_filtered (spaces
, "gnat_stuff ");
5152 gdb_print_host_address (TYPE_GNAT_SPECIFIC (type
), gdb_stdout
);
5153 puts_filtered ("\n");
5154 print_gnat_stuff (type
, spaces
);
5157 case TYPE_SPECIFIC_FLOATFORMAT
:
5158 printfi_filtered (spaces
, "floatformat ");
5159 if (TYPE_FLOATFORMAT (type
) == NULL
5160 || TYPE_FLOATFORMAT (type
)->name
== NULL
)
5161 puts_filtered ("(null)");
5163 puts_filtered (TYPE_FLOATFORMAT (type
)->name
);
5164 puts_filtered ("\n");
5167 case TYPE_SPECIFIC_FUNC
:
5168 printfi_filtered (spaces
, "calling_convention %d\n",
5169 TYPE_CALLING_CONVENTION (type
));
5170 /* tail_call_list is not printed. */
5173 case TYPE_SPECIFIC_SELF_TYPE
:
5174 printfi_filtered (spaces
, "self_type ");
5175 gdb_print_host_address (TYPE_SELF_TYPE (type
), gdb_stdout
);
5176 puts_filtered ("\n");
5181 obstack_free (&dont_print_type_obstack
, NULL
);
5184 /* Trivial helpers for the libiberty hash table, for mapping one
5187 struct type_pair
: public allocate_on_obstack
5189 type_pair (struct type
*old_
, struct type
*newobj_
)
5190 : old (old_
), newobj (newobj_
)
5193 struct type
* const old
, * const newobj
;
5197 type_pair_hash (const void *item
)
5199 const struct type_pair
*pair
= (const struct type_pair
*) item
;
5201 return htab_hash_pointer (pair
->old
);
5205 type_pair_eq (const void *item_lhs
, const void *item_rhs
)
5207 const struct type_pair
*lhs
= (const struct type_pair
*) item_lhs
;
5208 const struct type_pair
*rhs
= (const struct type_pair
*) item_rhs
;
5210 return lhs
->old
== rhs
->old
;
5213 /* Allocate the hash table used by copy_type_recursive to walk
5214 types without duplicates. We use OBJFILE's obstack, because
5215 OBJFILE is about to be deleted. */
5218 create_copied_types_hash (struct objfile
*objfile
)
5220 return htab_create_alloc_ex (1, type_pair_hash
, type_pair_eq
,
5221 NULL
, &objfile
->objfile_obstack
,
5222 hashtab_obstack_allocate
,
5223 dummy_obstack_deallocate
);
5226 /* Recursively copy (deep copy) a dynamic attribute list of a type. */
5228 static struct dynamic_prop_list
*
5229 copy_dynamic_prop_list (struct obstack
*objfile_obstack
,
5230 struct dynamic_prop_list
*list
)
5232 struct dynamic_prop_list
*copy
= list
;
5233 struct dynamic_prop_list
**node_ptr
= ©
;
5235 while (*node_ptr
!= NULL
)
5237 struct dynamic_prop_list
*node_copy
;
5239 node_copy
= ((struct dynamic_prop_list
*)
5240 obstack_copy (objfile_obstack
, *node_ptr
,
5241 sizeof (struct dynamic_prop_list
)));
5242 node_copy
->prop
= (*node_ptr
)->prop
;
5243 *node_ptr
= node_copy
;
5245 node_ptr
= &node_copy
->next
;
5251 /* Recursively copy (deep copy) TYPE, if it is associated with
5252 OBJFILE. Return a new type owned by the gdbarch associated with the type, a
5253 saved type if we have already visited TYPE (using COPIED_TYPES), or TYPE if
5254 it is not associated with OBJFILE. */
5257 copy_type_recursive (struct objfile
*objfile
,
5259 htab_t copied_types
)
5262 struct type
*new_type
;
5264 if (! TYPE_OBJFILE_OWNED (type
))
5267 /* This type shouldn't be pointing to any types in other objfiles;
5268 if it did, the type might disappear unexpectedly. */
5269 gdb_assert (TYPE_OBJFILE (type
) == objfile
);
5271 struct type_pair
pair (type
, nullptr);
5273 slot
= htab_find_slot (copied_types
, &pair
, INSERT
);
5275 return ((struct type_pair
*) *slot
)->newobj
;
5277 new_type
= alloc_type_arch (get_type_arch (type
));
5279 /* We must add the new type to the hash table immediately, in case
5280 we encounter this type again during a recursive call below. */
5281 struct type_pair
*stored
5282 = new (&objfile
->objfile_obstack
) struct type_pair (type
, new_type
);
5286 /* Copy the common fields of types. For the main type, we simply
5287 copy the entire thing and then update specific fields as needed. */
5288 *TYPE_MAIN_TYPE (new_type
) = *TYPE_MAIN_TYPE (type
);
5289 TYPE_OBJFILE_OWNED (new_type
) = 0;
5290 TYPE_OWNER (new_type
).gdbarch
= get_type_arch (type
);
5293 new_type
->set_name (xstrdup (type
->name ()));
5295 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
5296 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5298 /* Copy the fields. */
5299 if (TYPE_NFIELDS (type
))
5303 nfields
= TYPE_NFIELDS (type
);
5304 TYPE_FIELDS (new_type
) = (struct field
*)
5305 TYPE_ZALLOC (new_type
, nfields
* sizeof (struct field
));
5306 for (i
= 0; i
< nfields
; i
++)
5308 TYPE_FIELD_ARTIFICIAL (new_type
, i
) =
5309 TYPE_FIELD_ARTIFICIAL (type
, i
);
5310 TYPE_FIELD_BITSIZE (new_type
, i
) = TYPE_FIELD_BITSIZE (type
, i
);
5311 if (TYPE_FIELD_TYPE (type
, i
))
5312 TYPE_FIELD_TYPE (new_type
, i
)
5313 = copy_type_recursive (objfile
, TYPE_FIELD_TYPE (type
, i
),
5315 if (TYPE_FIELD_NAME (type
, i
))
5316 TYPE_FIELD_NAME (new_type
, i
) =
5317 xstrdup (TYPE_FIELD_NAME (type
, i
));
5318 switch (TYPE_FIELD_LOC_KIND (type
, i
))
5320 case FIELD_LOC_KIND_BITPOS
:
5321 SET_FIELD_BITPOS (TYPE_FIELD (new_type
, i
),
5322 TYPE_FIELD_BITPOS (type
, i
));
5324 case FIELD_LOC_KIND_ENUMVAL
:
5325 SET_FIELD_ENUMVAL (TYPE_FIELD (new_type
, i
),
5326 TYPE_FIELD_ENUMVAL (type
, i
));
5328 case FIELD_LOC_KIND_PHYSADDR
:
5329 SET_FIELD_PHYSADDR (TYPE_FIELD (new_type
, i
),
5330 TYPE_FIELD_STATIC_PHYSADDR (type
, i
));
5332 case FIELD_LOC_KIND_PHYSNAME
:
5333 SET_FIELD_PHYSNAME (TYPE_FIELD (new_type
, i
),
5334 xstrdup (TYPE_FIELD_STATIC_PHYSNAME (type
,
5338 internal_error (__FILE__
, __LINE__
,
5339 _("Unexpected type field location kind: %d"),
5340 TYPE_FIELD_LOC_KIND (type
, i
));
5345 /* For range types, copy the bounds information. */
5346 if (type
->code () == TYPE_CODE_RANGE
)
5348 TYPE_RANGE_DATA (new_type
) = (struct range_bounds
*)
5349 TYPE_ALLOC (new_type
, sizeof (struct range_bounds
));
5350 *TYPE_RANGE_DATA (new_type
) = *TYPE_RANGE_DATA (type
);
5353 if (type
->main_type
->dyn_prop_list
!= NULL
)
5354 new_type
->main_type
->dyn_prop_list
5355 = copy_dynamic_prop_list (&objfile
->objfile_obstack
,
5356 type
->main_type
->dyn_prop_list
);
5359 /* Copy pointers to other types. */
5360 if (TYPE_TARGET_TYPE (type
))
5361 TYPE_TARGET_TYPE (new_type
) =
5362 copy_type_recursive (objfile
,
5363 TYPE_TARGET_TYPE (type
),
5366 /* Maybe copy the type_specific bits.
5368 NOTE drow/2005-12-09: We do not copy the C++-specific bits like
5369 base classes and methods. There's no fundamental reason why we
5370 can't, but at the moment it is not needed. */
5372 switch (TYPE_SPECIFIC_FIELD (type
))
5374 case TYPE_SPECIFIC_NONE
:
5376 case TYPE_SPECIFIC_FUNC
:
5377 INIT_FUNC_SPECIFIC (new_type
);
5378 TYPE_CALLING_CONVENTION (new_type
) = TYPE_CALLING_CONVENTION (type
);
5379 TYPE_NO_RETURN (new_type
) = TYPE_NO_RETURN (type
);
5380 TYPE_TAIL_CALL_LIST (new_type
) = NULL
;
5382 case TYPE_SPECIFIC_FLOATFORMAT
:
5383 TYPE_FLOATFORMAT (new_type
) = TYPE_FLOATFORMAT (type
);
5385 case TYPE_SPECIFIC_CPLUS_STUFF
:
5386 INIT_CPLUS_SPECIFIC (new_type
);
5388 case TYPE_SPECIFIC_GNAT_STUFF
:
5389 INIT_GNAT_SPECIFIC (new_type
);
5391 case TYPE_SPECIFIC_SELF_TYPE
:
5392 set_type_self_type (new_type
,
5393 copy_type_recursive (objfile
, TYPE_SELF_TYPE (type
),
5397 gdb_assert_not_reached ("bad type_specific_kind");
5403 /* Make a copy of the given TYPE, except that the pointer & reference
5404 types are not preserved.
5406 This function assumes that the given type has an associated objfile.
5407 This objfile is used to allocate the new type. */
5410 copy_type (const struct type
*type
)
5412 struct type
*new_type
;
5414 gdb_assert (TYPE_OBJFILE_OWNED (type
));
5416 new_type
= alloc_type_copy (type
);
5417 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
5418 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5419 memcpy (TYPE_MAIN_TYPE (new_type
), TYPE_MAIN_TYPE (type
),
5420 sizeof (struct main_type
));
5421 if (type
->main_type
->dyn_prop_list
!= NULL
)
5422 new_type
->main_type
->dyn_prop_list
5423 = copy_dynamic_prop_list (&TYPE_OBJFILE (type
) -> objfile_obstack
,
5424 type
->main_type
->dyn_prop_list
);
5429 /* Helper functions to initialize architecture-specific types. */
5431 /* Allocate a type structure associated with GDBARCH and set its
5432 CODE, LENGTH, and NAME fields. */
5435 arch_type (struct gdbarch
*gdbarch
,
5436 enum type_code code
, int bit
, const char *name
)
5440 type
= alloc_type_arch (gdbarch
);
5441 set_type_code (type
, code
);
5442 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
5443 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
5446 type
->set_name (gdbarch_obstack_strdup (gdbarch
, name
));
5451 /* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
5452 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5453 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5456 arch_integer_type (struct gdbarch
*gdbarch
,
5457 int bit
, int unsigned_p
, const char *name
)
5461 t
= arch_type (gdbarch
, TYPE_CODE_INT
, bit
, name
);
5463 TYPE_UNSIGNED (t
) = 1;
5468 /* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
5469 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5470 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5473 arch_character_type (struct gdbarch
*gdbarch
,
5474 int bit
, int unsigned_p
, const char *name
)
5478 t
= arch_type (gdbarch
, TYPE_CODE_CHAR
, bit
, name
);
5480 TYPE_UNSIGNED (t
) = 1;
5485 /* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
5486 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5487 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5490 arch_boolean_type (struct gdbarch
*gdbarch
,
5491 int bit
, int unsigned_p
, const char *name
)
5495 t
= arch_type (gdbarch
, TYPE_CODE_BOOL
, bit
, name
);
5497 TYPE_UNSIGNED (t
) = 1;
5502 /* Allocate a TYPE_CODE_FLT type structure associated with GDBARCH.
5503 BIT is the type size in bits; if BIT equals -1, the size is
5504 determined by the floatformat. NAME is the type name. Set the
5505 TYPE_FLOATFORMAT from FLOATFORMATS. */
5508 arch_float_type (struct gdbarch
*gdbarch
,
5509 int bit
, const char *name
,
5510 const struct floatformat
**floatformats
)
5512 const struct floatformat
*fmt
= floatformats
[gdbarch_byte_order (gdbarch
)];
5515 bit
= verify_floatformat (bit
, fmt
);
5516 t
= arch_type (gdbarch
, TYPE_CODE_FLT
, bit
, name
);
5517 TYPE_FLOATFORMAT (t
) = fmt
;
5522 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with GDBARCH.
5523 BIT is the type size in bits. NAME is the type name. */
5526 arch_decfloat_type (struct gdbarch
*gdbarch
, int bit
, const char *name
)
5530 t
= arch_type (gdbarch
, TYPE_CODE_DECFLOAT
, bit
, name
);
5534 /* Allocate a TYPE_CODE_PTR type structure associated with GDBARCH.
5535 BIT is the pointer type size in bits. NAME is the type name.
5536 TARGET_TYPE is the pointer target type. Always sets the pointer type's
5537 TYPE_UNSIGNED flag. */
5540 arch_pointer_type (struct gdbarch
*gdbarch
,
5541 int bit
, const char *name
, struct type
*target_type
)
5545 t
= arch_type (gdbarch
, TYPE_CODE_PTR
, bit
, name
);
5546 TYPE_TARGET_TYPE (t
) = target_type
;
5547 TYPE_UNSIGNED (t
) = 1;
5551 /* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
5552 NAME is the type name. BIT is the size of the flag word in bits. */
5555 arch_flags_type (struct gdbarch
*gdbarch
, const char *name
, int bit
)
5559 type
= arch_type (gdbarch
, TYPE_CODE_FLAGS
, bit
, name
);
5560 TYPE_UNSIGNED (type
) = 1;
5561 type
->set_num_fields (0);
5562 /* Pre-allocate enough space assuming every field is one bit. */
5564 = (struct field
*) TYPE_ZALLOC (type
, bit
* sizeof (struct field
));
5569 /* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5570 position BITPOS is called NAME. Pass NAME as "" for fields that
5571 should not be printed. */
5574 append_flags_type_field (struct type
*type
, int start_bitpos
, int nr_bits
,
5575 struct type
*field_type
, const char *name
)
5577 int type_bitsize
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
5578 int field_nr
= TYPE_NFIELDS (type
);
5580 gdb_assert (type
->code () == TYPE_CODE_FLAGS
);
5581 gdb_assert (TYPE_NFIELDS (type
) + 1 <= type_bitsize
);
5582 gdb_assert (start_bitpos
>= 0 && start_bitpos
< type_bitsize
);
5583 gdb_assert (nr_bits
>= 1 && nr_bits
<= type_bitsize
);
5584 gdb_assert (name
!= NULL
);
5586 TYPE_FIELD_NAME (type
, field_nr
) = xstrdup (name
);
5587 TYPE_FIELD_TYPE (type
, field_nr
) = field_type
;
5588 SET_FIELD_BITPOS (TYPE_FIELD (type
, field_nr
), start_bitpos
);
5589 TYPE_FIELD_BITSIZE (type
, field_nr
) = nr_bits
;
5590 type
->set_num_fields (type
->num_fields () + 1);
5593 /* Special version of append_flags_type_field to add a flag field.
5594 Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5595 position BITPOS is called NAME. */
5598 append_flags_type_flag (struct type
*type
, int bitpos
, const char *name
)
5600 struct gdbarch
*gdbarch
= get_type_arch (type
);
5602 append_flags_type_field (type
, bitpos
, 1,
5603 builtin_type (gdbarch
)->builtin_bool
,
5607 /* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
5608 specified by CODE) associated with GDBARCH. NAME is the type name. */
5611 arch_composite_type (struct gdbarch
*gdbarch
, const char *name
,
5612 enum type_code code
)
5616 gdb_assert (code
== TYPE_CODE_STRUCT
|| code
== TYPE_CODE_UNION
);
5617 t
= arch_type (gdbarch
, code
, 0, NULL
);
5619 INIT_CPLUS_SPECIFIC (t
);
5623 /* Add new field with name NAME and type FIELD to composite type T.
5624 Do not set the field's position or adjust the type's length;
5625 the caller should do so. Return the new field. */
5628 append_composite_type_field_raw (struct type
*t
, const char *name
,
5633 t
->set_num_fields (TYPE_NFIELDS (t
) + 1);
5634 TYPE_FIELDS (t
) = XRESIZEVEC (struct field
, TYPE_FIELDS (t
),
5636 f
= &(TYPE_FIELDS (t
)[TYPE_NFIELDS (t
) - 1]);
5637 memset (f
, 0, sizeof f
[0]);
5638 FIELD_TYPE (f
[0]) = field
;
5639 FIELD_NAME (f
[0]) = name
;
5643 /* Add new field with name NAME and type FIELD to composite type T.
5644 ALIGNMENT (if non-zero) specifies the minimum field alignment. */
5647 append_composite_type_field_aligned (struct type
*t
, const char *name
,
5648 struct type
*field
, int alignment
)
5650 struct field
*f
= append_composite_type_field_raw (t
, name
, field
);
5652 if (t
->code () == TYPE_CODE_UNION
)
5654 if (TYPE_LENGTH (t
) < TYPE_LENGTH (field
))
5655 TYPE_LENGTH (t
) = TYPE_LENGTH (field
);
5657 else if (t
->code () == TYPE_CODE_STRUCT
)
5659 TYPE_LENGTH (t
) = TYPE_LENGTH (t
) + TYPE_LENGTH (field
);
5660 if (TYPE_NFIELDS (t
) > 1)
5662 SET_FIELD_BITPOS (f
[0],
5663 (FIELD_BITPOS (f
[-1])
5664 + (TYPE_LENGTH (FIELD_TYPE (f
[-1]))
5665 * TARGET_CHAR_BIT
)));
5671 alignment
*= TARGET_CHAR_BIT
;
5672 left
= FIELD_BITPOS (f
[0]) % alignment
;
5676 SET_FIELD_BITPOS (f
[0], FIELD_BITPOS (f
[0]) + (alignment
- left
));
5677 TYPE_LENGTH (t
) += (alignment
- left
) / TARGET_CHAR_BIT
;
5684 /* Add new field with name NAME and type FIELD to composite type T. */
5687 append_composite_type_field (struct type
*t
, const char *name
,
5690 append_composite_type_field_aligned (t
, name
, field
, 0);
5693 static struct gdbarch_data
*gdbtypes_data
;
5695 const struct builtin_type
*
5696 builtin_type (struct gdbarch
*gdbarch
)
5698 return (const struct builtin_type
*) gdbarch_data (gdbarch
, gdbtypes_data
);
5702 gdbtypes_post_init (struct gdbarch
*gdbarch
)
5704 struct builtin_type
*builtin_type
5705 = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct builtin_type
);
5708 builtin_type
->builtin_void
5709 = arch_type (gdbarch
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5710 builtin_type
->builtin_char
5711 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5712 !gdbarch_char_signed (gdbarch
), "char");
5713 TYPE_NOSIGN (builtin_type
->builtin_char
) = 1;
5714 builtin_type
->builtin_signed_char
5715 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5717 builtin_type
->builtin_unsigned_char
5718 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5719 1, "unsigned char");
5720 builtin_type
->builtin_short
5721 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5723 builtin_type
->builtin_unsigned_short
5724 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5725 1, "unsigned short");
5726 builtin_type
->builtin_int
5727 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5729 builtin_type
->builtin_unsigned_int
5730 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5732 builtin_type
->builtin_long
5733 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5735 builtin_type
->builtin_unsigned_long
5736 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5737 1, "unsigned long");
5738 builtin_type
->builtin_long_long
5739 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5741 builtin_type
->builtin_unsigned_long_long
5742 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5743 1, "unsigned long long");
5744 builtin_type
->builtin_half
5745 = arch_float_type (gdbarch
, gdbarch_half_bit (gdbarch
),
5746 "half", gdbarch_half_format (gdbarch
));
5747 builtin_type
->builtin_float
5748 = arch_float_type (gdbarch
, gdbarch_float_bit (gdbarch
),
5749 "float", gdbarch_float_format (gdbarch
));
5750 builtin_type
->builtin_double
5751 = arch_float_type (gdbarch
, gdbarch_double_bit (gdbarch
),
5752 "double", gdbarch_double_format (gdbarch
));
5753 builtin_type
->builtin_long_double
5754 = arch_float_type (gdbarch
, gdbarch_long_double_bit (gdbarch
),
5755 "long double", gdbarch_long_double_format (gdbarch
));
5756 builtin_type
->builtin_complex
5757 = init_complex_type ("complex", builtin_type
->builtin_float
);
5758 builtin_type
->builtin_double_complex
5759 = init_complex_type ("double complex", builtin_type
->builtin_double
);
5760 builtin_type
->builtin_string
5761 = arch_type (gdbarch
, TYPE_CODE_STRING
, TARGET_CHAR_BIT
, "string");
5762 builtin_type
->builtin_bool
5763 = arch_type (gdbarch
, TYPE_CODE_BOOL
, TARGET_CHAR_BIT
, "bool");
5765 /* The following three are about decimal floating point types, which
5766 are 32-bits, 64-bits and 128-bits respectively. */
5767 builtin_type
->builtin_decfloat
5768 = arch_decfloat_type (gdbarch
, 32, "_Decimal32");
5769 builtin_type
->builtin_decdouble
5770 = arch_decfloat_type (gdbarch
, 64, "_Decimal64");
5771 builtin_type
->builtin_declong
5772 = arch_decfloat_type (gdbarch
, 128, "_Decimal128");
5774 /* "True" character types. */
5775 builtin_type
->builtin_true_char
5776 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 0, "true character");
5777 builtin_type
->builtin_true_unsigned_char
5778 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 1, "true character");
5780 /* Fixed-size integer types. */
5781 builtin_type
->builtin_int0
5782 = arch_integer_type (gdbarch
, 0, 0, "int0_t");
5783 builtin_type
->builtin_int8
5784 = arch_integer_type (gdbarch
, 8, 0, "int8_t");
5785 builtin_type
->builtin_uint8
5786 = arch_integer_type (gdbarch
, 8, 1, "uint8_t");
5787 builtin_type
->builtin_int16
5788 = arch_integer_type (gdbarch
, 16, 0, "int16_t");
5789 builtin_type
->builtin_uint16
5790 = arch_integer_type (gdbarch
, 16, 1, "uint16_t");
5791 builtin_type
->builtin_int24
5792 = arch_integer_type (gdbarch
, 24, 0, "int24_t");
5793 builtin_type
->builtin_uint24
5794 = arch_integer_type (gdbarch
, 24, 1, "uint24_t");
5795 builtin_type
->builtin_int32
5796 = arch_integer_type (gdbarch
, 32, 0, "int32_t");
5797 builtin_type
->builtin_uint32
5798 = arch_integer_type (gdbarch
, 32, 1, "uint32_t");
5799 builtin_type
->builtin_int64
5800 = arch_integer_type (gdbarch
, 64, 0, "int64_t");
5801 builtin_type
->builtin_uint64
5802 = arch_integer_type (gdbarch
, 64, 1, "uint64_t");
5803 builtin_type
->builtin_int128
5804 = arch_integer_type (gdbarch
, 128, 0, "int128_t");
5805 builtin_type
->builtin_uint128
5806 = arch_integer_type (gdbarch
, 128, 1, "uint128_t");
5807 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_int8
) |=
5808 TYPE_INSTANCE_FLAG_NOTTEXT
;
5809 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_uint8
) |=
5810 TYPE_INSTANCE_FLAG_NOTTEXT
;
5812 /* Wide character types. */
5813 builtin_type
->builtin_char16
5814 = arch_integer_type (gdbarch
, 16, 1, "char16_t");
5815 builtin_type
->builtin_char32
5816 = arch_integer_type (gdbarch
, 32, 1, "char32_t");
5817 builtin_type
->builtin_wchar
5818 = arch_integer_type (gdbarch
, gdbarch_wchar_bit (gdbarch
),
5819 !gdbarch_wchar_signed (gdbarch
), "wchar_t");
5821 /* Default data/code pointer types. */
5822 builtin_type
->builtin_data_ptr
5823 = lookup_pointer_type (builtin_type
->builtin_void
);
5824 builtin_type
->builtin_func_ptr
5825 = lookup_pointer_type (lookup_function_type (builtin_type
->builtin_void
));
5826 builtin_type
->builtin_func_func
5827 = lookup_function_type (builtin_type
->builtin_func_ptr
);
5829 /* This type represents a GDB internal function. */
5830 builtin_type
->internal_fn
5831 = arch_type (gdbarch
, TYPE_CODE_INTERNAL_FUNCTION
, 0,
5832 "<internal function>");
5834 /* This type represents an xmethod. */
5835 builtin_type
->xmethod
5836 = arch_type (gdbarch
, TYPE_CODE_XMETHOD
, 0, "<xmethod>");
5838 return builtin_type
;
5841 /* This set of objfile-based types is intended to be used by symbol
5842 readers as basic types. */
5844 static const struct objfile_key
<struct objfile_type
,
5845 gdb::noop_deleter
<struct objfile_type
>>
5848 const struct objfile_type
*
5849 objfile_type (struct objfile
*objfile
)
5851 struct gdbarch
*gdbarch
;
5852 struct objfile_type
*objfile_type
= objfile_type_data
.get (objfile
);
5855 return objfile_type
;
5857 objfile_type
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
5858 1, struct objfile_type
);
5860 /* Use the objfile architecture to determine basic type properties. */
5861 gdbarch
= objfile
->arch ();
5864 objfile_type
->builtin_void
5865 = init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5866 objfile_type
->builtin_char
5867 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5868 !gdbarch_char_signed (gdbarch
), "char");
5869 TYPE_NOSIGN (objfile_type
->builtin_char
) = 1;
5870 objfile_type
->builtin_signed_char
5871 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5873 objfile_type
->builtin_unsigned_char
5874 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5875 1, "unsigned char");
5876 objfile_type
->builtin_short
5877 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5879 objfile_type
->builtin_unsigned_short
5880 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5881 1, "unsigned short");
5882 objfile_type
->builtin_int
5883 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5885 objfile_type
->builtin_unsigned_int
5886 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5888 objfile_type
->builtin_long
5889 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5891 objfile_type
->builtin_unsigned_long
5892 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5893 1, "unsigned long");
5894 objfile_type
->builtin_long_long
5895 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5897 objfile_type
->builtin_unsigned_long_long
5898 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5899 1, "unsigned long long");
5900 objfile_type
->builtin_float
5901 = init_float_type (objfile
, gdbarch_float_bit (gdbarch
),
5902 "float", gdbarch_float_format (gdbarch
));
5903 objfile_type
->builtin_double
5904 = init_float_type (objfile
, gdbarch_double_bit (gdbarch
),
5905 "double", gdbarch_double_format (gdbarch
));
5906 objfile_type
->builtin_long_double
5907 = init_float_type (objfile
, gdbarch_long_double_bit (gdbarch
),
5908 "long double", gdbarch_long_double_format (gdbarch
));
5910 /* This type represents a type that was unrecognized in symbol read-in. */
5911 objfile_type
->builtin_error
5912 = init_type (objfile
, TYPE_CODE_ERROR
, 0, "<unknown type>");
5914 /* The following set of types is used for symbols with no
5915 debug information. */
5916 objfile_type
->nodebug_text_symbol
5917 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5918 "<text variable, no debug info>");
5919 objfile_type
->nodebug_text_gnu_ifunc_symbol
5920 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5921 "<text gnu-indirect-function variable, no debug info>");
5922 TYPE_GNU_IFUNC (objfile_type
->nodebug_text_gnu_ifunc_symbol
) = 1;
5923 objfile_type
->nodebug_got_plt_symbol
5924 = init_pointer_type (objfile
, gdbarch_addr_bit (gdbarch
),
5925 "<text from jump slot in .got.plt, no debug info>",
5926 objfile_type
->nodebug_text_symbol
);
5927 objfile_type
->nodebug_data_symbol
5928 = init_nodebug_var_type (objfile
, "<data variable, no debug info>");
5929 objfile_type
->nodebug_unknown_symbol
5930 = init_nodebug_var_type (objfile
, "<variable (not text or data), no debug info>");
5931 objfile_type
->nodebug_tls_symbol
5932 = init_nodebug_var_type (objfile
, "<thread local variable, no debug info>");
5934 /* NOTE: on some targets, addresses and pointers are not necessarily
5938 - gdb's `struct type' always describes the target's
5940 - gdb's `struct value' objects should always hold values in
5942 - gdb's CORE_ADDR values are addresses in the unified virtual
5943 address space that the assembler and linker work with. Thus,
5944 since target_read_memory takes a CORE_ADDR as an argument, it
5945 can access any memory on the target, even if the processor has
5946 separate code and data address spaces.
5948 In this context, objfile_type->builtin_core_addr is a bit odd:
5949 it's a target type for a value the target will never see. It's
5950 only used to hold the values of (typeless) linker symbols, which
5951 are indeed in the unified virtual address space. */
5953 objfile_type
->builtin_core_addr
5954 = init_integer_type (objfile
, gdbarch_addr_bit (gdbarch
), 1,
5957 objfile_type_data
.set (objfile
, objfile_type
);
5958 return objfile_type
;
5961 void _initialize_gdbtypes ();
5963 _initialize_gdbtypes ()
5965 gdbtypes_data
= gdbarch_data_register_post_init (gdbtypes_post_init
);
5967 add_setshow_zuinteger_cmd ("overload", no_class
, &overload_debug
,
5968 _("Set debugging of C++ overloading."),
5969 _("Show debugging of C++ overloading."),
5970 _("When enabled, ranking of the "
5971 "functions is displayed."),
5973 show_overload_debug
,
5974 &setdebuglist
, &showdebuglist
);
5976 /* Add user knob for controlling resolution of opaque types. */
5977 add_setshow_boolean_cmd ("opaque-type-resolution", class_support
,
5978 &opaque_type_resolution
,
5979 _("Set resolution of opaque struct/class/union"
5980 " types (if set before loading symbols)."),
5981 _("Show resolution of opaque struct/class/union"
5982 " types (if set before loading symbols)."),
5984 show_opaque_type_resolution
,
5985 &setlist
, &showlist
);
5987 /* Add an option to permit non-strict type checking. */
5988 add_setshow_boolean_cmd ("type", class_support
,
5989 &strict_type_checking
,
5990 _("Set strict type checking."),
5991 _("Show strict type checking."),
5993 show_strict_type_checking
,
5994 &setchecklist
, &showchecklist
);