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 fn
->field (i
).set_type (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
);
1041 if (TYPE_TARGET_TYPE (type
)->code () == TYPE_CODE_ENUM
)
1043 if (!discrete_position (TYPE_TARGET_TYPE (type
), *lowp
, lowp
)
1044 || ! discrete_position (TYPE_TARGET_TYPE (type
), *highp
, highp
))
1048 case TYPE_CODE_ENUM
:
1049 if (type
->num_fields () > 0)
1051 /* The enums may not be sorted by value, so search all
1055 *lowp
= *highp
= TYPE_FIELD_ENUMVAL (type
, 0);
1056 for (i
= 0; i
< type
->num_fields (); i
++)
1058 if (TYPE_FIELD_ENUMVAL (type
, i
) < *lowp
)
1059 *lowp
= TYPE_FIELD_ENUMVAL (type
, i
);
1060 if (TYPE_FIELD_ENUMVAL (type
, i
) > *highp
)
1061 *highp
= TYPE_FIELD_ENUMVAL (type
, i
);
1064 /* Set unsigned indicator if warranted. */
1067 TYPE_UNSIGNED (type
) = 1;
1076 case TYPE_CODE_BOOL
:
1081 if (TYPE_LENGTH (type
) > sizeof (LONGEST
)) /* Too big */
1083 if (!TYPE_UNSIGNED (type
))
1085 *lowp
= -(1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1));
1086 *highp
= -*lowp
- 1;
1090 case TYPE_CODE_CHAR
:
1092 /* This round-about calculation is to avoid shifting by
1093 TYPE_LENGTH (type) * TARGET_CHAR_BIT, which will not work
1094 if TYPE_LENGTH (type) == sizeof (LONGEST). */
1095 *highp
= 1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1);
1096 *highp
= (*highp
- 1) | *highp
;
1103 /* Assuming TYPE is a simple, non-empty array type, compute its upper
1104 and lower bound. Save the low bound into LOW_BOUND if not NULL.
1105 Save the high bound into HIGH_BOUND if not NULL.
1107 Return 1 if the operation was successful. Return zero otherwise,
1108 in which case the values of LOW_BOUND and HIGH_BOUNDS are unmodified.
1110 We now simply use get_discrete_bounds call to get the values
1111 of the low and high bounds.
1112 get_discrete_bounds can return three values:
1113 1, meaning that index is a range,
1114 0, meaning that index is a discrete type,
1115 or -1 for failure. */
1118 get_array_bounds (struct type
*type
, LONGEST
*low_bound
, LONGEST
*high_bound
)
1120 struct type
*index
= type
->index_type ();
1128 res
= get_discrete_bounds (index
, &low
, &high
);
1132 /* Check if the array bounds are undefined. */
1134 && ((low_bound
&& TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type
))
1135 || (high_bound
&& TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type
))))
1147 /* Assuming that TYPE is a discrete type and VAL is a valid integer
1148 representation of a value of this type, save the corresponding
1149 position number in POS.
1151 Its differs from VAL only in the case of enumeration types. In
1152 this case, the position number of the value of the first listed
1153 enumeration literal is zero; the position number of the value of
1154 each subsequent enumeration literal is one more than that of its
1155 predecessor in the list.
1157 Return 1 if the operation was successful. Return zero otherwise,
1158 in which case the value of POS is unmodified.
1162 discrete_position (struct type
*type
, LONGEST val
, LONGEST
*pos
)
1164 if (type
->code () == TYPE_CODE_RANGE
)
1165 type
= TYPE_TARGET_TYPE (type
);
1167 if (type
->code () == TYPE_CODE_ENUM
)
1171 for (i
= 0; i
< type
->num_fields (); i
+= 1)
1173 if (val
== TYPE_FIELD_ENUMVAL (type
, i
))
1179 /* Invalid enumeration value. */
1189 /* If the array TYPE has static bounds calculate and update its
1190 size, then return true. Otherwise return false and leave TYPE
1194 update_static_array_size (struct type
*type
)
1196 gdb_assert (type
->code () == TYPE_CODE_ARRAY
);
1198 struct type
*range_type
= type
->index_type ();
1200 if (type
->dyn_prop (DYN_PROP_BYTE_STRIDE
) == nullptr
1201 && has_static_range (TYPE_RANGE_DATA (range_type
))
1202 && (!type_not_associated (type
)
1203 && !type_not_allocated (type
)))
1205 LONGEST low_bound
, high_bound
;
1207 struct type
*element_type
;
1209 /* If the array itself doesn't provide a stride value then take
1210 whatever stride the range provides. Don't update BIT_STRIDE as
1211 we don't want to place the stride value from the range into this
1212 arrays bit size field. */
1213 stride
= TYPE_FIELD_BITSIZE (type
, 0);
1215 stride
= TYPE_BIT_STRIDE (range_type
);
1217 if (get_discrete_bounds (range_type
, &low_bound
, &high_bound
) < 0)
1218 low_bound
= high_bound
= 0;
1219 element_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1220 /* Be careful when setting the array length. Ada arrays can be
1221 empty arrays with the high_bound being smaller than the low_bound.
1222 In such cases, the array length should be zero. */
1223 if (high_bound
< low_bound
)
1224 TYPE_LENGTH (type
) = 0;
1225 else if (stride
!= 0)
1227 /* Ensure that the type length is always positive, even in the
1228 case where (for example in Fortran) we have a negative
1229 stride. It is possible to have a single element array with a
1230 negative stride in Fortran (this doesn't mean anything
1231 special, it's still just a single element array) so do
1232 consider that case when touching this code. */
1233 LONGEST element_count
= std::abs (high_bound
- low_bound
+ 1);
1235 = ((std::abs (stride
) * element_count
) + 7) / 8;
1238 TYPE_LENGTH (type
) =
1239 TYPE_LENGTH (element_type
) * (high_bound
- low_bound
+ 1);
1247 /* Create an array type using either a blank type supplied in
1248 RESULT_TYPE, or creating a new type, inheriting the objfile from
1251 Elements will be of type ELEMENT_TYPE, the indices will be of type
1254 BYTE_STRIDE_PROP, when not NULL, provides the array's byte stride.
1255 This byte stride property is added to the resulting array type
1256 as a DYN_PROP_BYTE_STRIDE. As a consequence, the BYTE_STRIDE_PROP
1257 argument can only be used to create types that are objfile-owned
1258 (see add_dyn_prop), meaning that either this function must be called
1259 with an objfile-owned RESULT_TYPE, or an objfile-owned RANGE_TYPE.
1261 BIT_STRIDE is taken into account only when BYTE_STRIDE_PROP is NULL.
1262 If BIT_STRIDE is not zero, build a packed array type whose element
1263 size is BIT_STRIDE. Otherwise, ignore this parameter.
1265 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1266 sure it is TYPE_CODE_UNDEF before we bash it into an array
1270 create_array_type_with_stride (struct type
*result_type
,
1271 struct type
*element_type
,
1272 struct type
*range_type
,
1273 struct dynamic_prop
*byte_stride_prop
,
1274 unsigned int bit_stride
)
1276 if (byte_stride_prop
!= NULL
1277 && byte_stride_prop
->kind
== PROP_CONST
)
1279 /* The byte stride is actually not dynamic. Pretend we were
1280 called with bit_stride set instead of byte_stride_prop.
1281 This will give us the same result type, while avoiding
1282 the need to handle this as a special case. */
1283 bit_stride
= byte_stride_prop
->data
.const_val
* 8;
1284 byte_stride_prop
= NULL
;
1287 if (result_type
== NULL
)
1288 result_type
= alloc_type_copy (range_type
);
1290 result_type
->set_code (TYPE_CODE_ARRAY
);
1291 TYPE_TARGET_TYPE (result_type
) = element_type
;
1293 result_type
->set_num_fields (1);
1294 result_type
->set_fields
1295 ((struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
)));
1296 result_type
->set_index_type (range_type
);
1297 if (byte_stride_prop
!= NULL
)
1298 result_type
->add_dyn_prop (DYN_PROP_BYTE_STRIDE
, *byte_stride_prop
);
1299 else if (bit_stride
> 0)
1300 TYPE_FIELD_BITSIZE (result_type
, 0) = bit_stride
;
1302 if (!update_static_array_size (result_type
))
1304 /* This type is dynamic and its length needs to be computed
1305 on demand. In the meantime, avoid leaving the TYPE_LENGTH
1306 undefined by setting it to zero. Although we are not expected
1307 to trust TYPE_LENGTH in this case, setting the size to zero
1308 allows us to avoid allocating objects of random sizes in case
1309 we accidently do. */
1310 TYPE_LENGTH (result_type
) = 0;
1313 /* TYPE_TARGET_STUB will take care of zero length arrays. */
1314 if (TYPE_LENGTH (result_type
) == 0)
1315 TYPE_TARGET_STUB (result_type
) = 1;
1320 /* Same as create_array_type_with_stride but with no bit_stride
1321 (BIT_STRIDE = 0), thus building an unpacked array. */
1324 create_array_type (struct type
*result_type
,
1325 struct type
*element_type
,
1326 struct type
*range_type
)
1328 return create_array_type_with_stride (result_type
, element_type
,
1329 range_type
, NULL
, 0);
1333 lookup_array_range_type (struct type
*element_type
,
1334 LONGEST low_bound
, LONGEST high_bound
)
1336 struct type
*index_type
;
1337 struct type
*range_type
;
1339 if (TYPE_OBJFILE_OWNED (element_type
))
1340 index_type
= objfile_type (TYPE_OWNER (element_type
).objfile
)->builtin_int
;
1342 index_type
= builtin_type (get_type_arch (element_type
))->builtin_int
;
1343 range_type
= create_static_range_type (NULL
, index_type
,
1344 low_bound
, high_bound
);
1346 return create_array_type (NULL
, element_type
, range_type
);
1349 /* Create a string type using either a blank type supplied in
1350 RESULT_TYPE, or creating a new type. String types are similar
1351 enough to array of char types that we can use create_array_type to
1352 build the basic type and then bash it into a string type.
1354 For fixed length strings, the range type contains 0 as the lower
1355 bound and the length of the string minus one as the upper bound.
1357 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1358 sure it is TYPE_CODE_UNDEF before we bash it into a string
1362 create_string_type (struct type
*result_type
,
1363 struct type
*string_char_type
,
1364 struct type
*range_type
)
1366 result_type
= create_array_type (result_type
,
1369 result_type
->set_code (TYPE_CODE_STRING
);
1374 lookup_string_range_type (struct type
*string_char_type
,
1375 LONGEST low_bound
, LONGEST high_bound
)
1377 struct type
*result_type
;
1379 result_type
= lookup_array_range_type (string_char_type
,
1380 low_bound
, high_bound
);
1381 result_type
->set_code (TYPE_CODE_STRING
);
1386 create_set_type (struct type
*result_type
, struct type
*domain_type
)
1388 if (result_type
== NULL
)
1389 result_type
= alloc_type_copy (domain_type
);
1391 result_type
->set_code (TYPE_CODE_SET
);
1392 result_type
->set_num_fields (1);
1393 result_type
->set_fields
1394 ((struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
)));
1396 if (!TYPE_STUB (domain_type
))
1398 LONGEST low_bound
, high_bound
, bit_length
;
1400 if (get_discrete_bounds (domain_type
, &low_bound
, &high_bound
) < 0)
1401 low_bound
= high_bound
= 0;
1402 bit_length
= high_bound
- low_bound
+ 1;
1403 TYPE_LENGTH (result_type
)
1404 = (bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1406 TYPE_UNSIGNED (result_type
) = 1;
1408 result_type
->field (0).set_type (domain_type
);
1413 /* Convert ARRAY_TYPE to a vector type. This may modify ARRAY_TYPE
1414 and any array types nested inside it. */
1417 make_vector_type (struct type
*array_type
)
1419 struct type
*inner_array
, *elt_type
;
1422 /* Find the innermost array type, in case the array is
1423 multi-dimensional. */
1424 inner_array
= array_type
;
1425 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
1426 inner_array
= TYPE_TARGET_TYPE (inner_array
);
1428 elt_type
= TYPE_TARGET_TYPE (inner_array
);
1429 if (elt_type
->code () == TYPE_CODE_INT
)
1431 flags
= TYPE_INSTANCE_FLAGS (elt_type
) | TYPE_INSTANCE_FLAG_NOTTEXT
;
1432 elt_type
= make_qualified_type (elt_type
, flags
, NULL
);
1433 TYPE_TARGET_TYPE (inner_array
) = elt_type
;
1436 TYPE_VECTOR (array_type
) = 1;
1440 init_vector_type (struct type
*elt_type
, int n
)
1442 struct type
*array_type
;
1444 array_type
= lookup_array_range_type (elt_type
, 0, n
- 1);
1445 make_vector_type (array_type
);
1449 /* Internal routine called by TYPE_SELF_TYPE to return the type that TYPE
1450 belongs to. In c++ this is the class of "this", but TYPE_THIS_TYPE is too
1451 confusing. "self" is a common enough replacement for "this".
1452 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1453 TYPE_CODE_METHOD. */
1456 internal_type_self_type (struct type
*type
)
1458 switch (type
->code ())
1460 case TYPE_CODE_METHODPTR
:
1461 case TYPE_CODE_MEMBERPTR
:
1462 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1464 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1465 return TYPE_MAIN_TYPE (type
)->type_specific
.self_type
;
1466 case TYPE_CODE_METHOD
:
1467 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1469 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1470 return TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
;
1472 gdb_assert_not_reached ("bad type");
1476 /* Set the type of the class that TYPE belongs to.
1477 In c++ this is the class of "this".
1478 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1479 TYPE_CODE_METHOD. */
1482 set_type_self_type (struct type
*type
, struct type
*self_type
)
1484 switch (type
->code ())
1486 case TYPE_CODE_METHODPTR
:
1487 case TYPE_CODE_MEMBERPTR
:
1488 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1489 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_SELF_TYPE
;
1490 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1491 TYPE_MAIN_TYPE (type
)->type_specific
.self_type
= self_type
;
1493 case TYPE_CODE_METHOD
:
1494 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1495 INIT_FUNC_SPECIFIC (type
);
1496 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1497 TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
= self_type
;
1500 gdb_assert_not_reached ("bad type");
1504 /* Smash TYPE to be a type of pointers to members of SELF_TYPE with type
1505 TO_TYPE. A member pointer is a wierd thing -- it amounts to a
1506 typed offset into a struct, e.g. "an int at offset 8". A MEMBER
1507 TYPE doesn't include the offset (that's the value of the MEMBER
1508 itself), but does include the structure type into which it points
1511 When "smashing" the type, we preserve the objfile that the old type
1512 pointed to, since we aren't changing where the type is actually
1516 smash_to_memberptr_type (struct type
*type
, struct type
*self_type
,
1517 struct type
*to_type
)
1520 type
->set_code (TYPE_CODE_MEMBERPTR
);
1521 TYPE_TARGET_TYPE (type
) = to_type
;
1522 set_type_self_type (type
, self_type
);
1523 /* Assume that a data member pointer is the same size as a normal
1526 = gdbarch_ptr_bit (get_type_arch (to_type
)) / TARGET_CHAR_BIT
;
1529 /* Smash TYPE to be a type of pointer to methods type TO_TYPE.
1531 When "smashing" the type, we preserve the objfile that the old type
1532 pointed to, since we aren't changing where the type is actually
1536 smash_to_methodptr_type (struct type
*type
, struct type
*to_type
)
1539 type
->set_code (TYPE_CODE_METHODPTR
);
1540 TYPE_TARGET_TYPE (type
) = to_type
;
1541 set_type_self_type (type
, TYPE_SELF_TYPE (to_type
));
1542 TYPE_LENGTH (type
) = cplus_method_ptr_size (to_type
);
1545 /* Smash TYPE to be a type of method of SELF_TYPE with type TO_TYPE.
1546 METHOD just means `function that gets an extra "this" argument'.
1548 When "smashing" the type, we preserve the objfile that the old type
1549 pointed to, since we aren't changing where the type is actually
1553 smash_to_method_type (struct type
*type
, struct type
*self_type
,
1554 struct type
*to_type
, struct field
*args
,
1555 int nargs
, int varargs
)
1558 type
->set_code (TYPE_CODE_METHOD
);
1559 TYPE_TARGET_TYPE (type
) = to_type
;
1560 set_type_self_type (type
, self_type
);
1561 type
->set_fields (args
);
1562 type
->set_num_fields (nargs
);
1564 TYPE_VARARGS (type
) = 1;
1565 TYPE_LENGTH (type
) = 1; /* In practice, this is never needed. */
1568 /* A wrapper of TYPE_NAME which calls error if the type is anonymous.
1569 Since GCC PR debug/47510 DWARF provides associated information to detect the
1570 anonymous class linkage name from its typedef.
1572 Parameter TYPE should not yet have CHECK_TYPEDEF applied, this function will
1576 type_name_or_error (struct type
*type
)
1578 struct type
*saved_type
= type
;
1580 struct objfile
*objfile
;
1582 type
= check_typedef (type
);
1584 name
= type
->name ();
1588 name
= saved_type
->name ();
1589 objfile
= TYPE_OBJFILE (saved_type
);
1590 error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
1591 name
? name
: "<anonymous>",
1592 objfile
? objfile_name (objfile
) : "<arch>");
1595 /* Lookup a typedef or primitive type named NAME, visible in lexical
1596 block BLOCK. If NOERR is nonzero, return zero if NAME is not
1597 suitably defined. */
1600 lookup_typename (const struct language_defn
*language
,
1602 const struct block
*block
, int noerr
)
1606 sym
= lookup_symbol_in_language (name
, block
, VAR_DOMAIN
,
1607 language
->la_language
, NULL
).symbol
;
1608 if (sym
!= NULL
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
1609 return SYMBOL_TYPE (sym
);
1613 error (_("No type named %s."), name
);
1617 lookup_unsigned_typename (const struct language_defn
*language
,
1620 char *uns
= (char *) alloca (strlen (name
) + 10);
1622 strcpy (uns
, "unsigned ");
1623 strcpy (uns
+ 9, name
);
1624 return lookup_typename (language
, uns
, NULL
, 0);
1628 lookup_signed_typename (const struct language_defn
*language
, const char *name
)
1631 char *uns
= (char *) alloca (strlen (name
) + 8);
1633 strcpy (uns
, "signed ");
1634 strcpy (uns
+ 7, name
);
1635 t
= lookup_typename (language
, uns
, NULL
, 1);
1636 /* If we don't find "signed FOO" just try again with plain "FOO". */
1639 return lookup_typename (language
, name
, NULL
, 0);
1642 /* Lookup a structure type named "struct NAME",
1643 visible in lexical block BLOCK. */
1646 lookup_struct (const char *name
, const struct block
*block
)
1650 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1654 error (_("No struct type named %s."), name
);
1656 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_STRUCT
)
1658 error (_("This context has class, union or enum %s, not a struct."),
1661 return (SYMBOL_TYPE (sym
));
1664 /* Lookup a union type named "union NAME",
1665 visible in lexical block BLOCK. */
1668 lookup_union (const char *name
, const struct block
*block
)
1673 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1676 error (_("No union type named %s."), name
);
1678 t
= SYMBOL_TYPE (sym
);
1680 if (t
->code () == TYPE_CODE_UNION
)
1683 /* If we get here, it's not a union. */
1684 error (_("This context has class, struct or enum %s, not a union."),
1688 /* Lookup an enum type named "enum NAME",
1689 visible in lexical block BLOCK. */
1692 lookup_enum (const char *name
, const struct block
*block
)
1696 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1699 error (_("No enum type named %s."), name
);
1701 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_ENUM
)
1703 error (_("This context has class, struct or union %s, not an enum."),
1706 return (SYMBOL_TYPE (sym
));
1709 /* Lookup a template type named "template NAME<TYPE>",
1710 visible in lexical block BLOCK. */
1713 lookup_template_type (const char *name
, struct type
*type
,
1714 const struct block
*block
)
1717 char *nam
= (char *)
1718 alloca (strlen (name
) + strlen (type
->name ()) + 4);
1722 strcat (nam
, type
->name ());
1723 strcat (nam
, " >"); /* FIXME, extra space still introduced in gcc? */
1725 sym
= lookup_symbol (nam
, block
, VAR_DOMAIN
, 0).symbol
;
1729 error (_("No template type named %s."), name
);
1731 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_STRUCT
)
1733 error (_("This context has class, union or enum %s, not a struct."),
1736 return (SYMBOL_TYPE (sym
));
1739 /* See gdbtypes.h. */
1742 lookup_struct_elt (struct type
*type
, const char *name
, int noerr
)
1748 type
= check_typedef (type
);
1749 if (type
->code () != TYPE_CODE_PTR
1750 && type
->code () != TYPE_CODE_REF
)
1752 type
= TYPE_TARGET_TYPE (type
);
1755 if (type
->code () != TYPE_CODE_STRUCT
1756 && type
->code () != TYPE_CODE_UNION
)
1758 std::string type_name
= type_to_string (type
);
1759 error (_("Type %s is not a structure or union type."),
1760 type_name
.c_str ());
1763 for (i
= type
->num_fields () - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1765 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1767 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1769 return {&type
->field (i
), TYPE_FIELD_BITPOS (type
, i
)};
1771 else if (!t_field_name
|| *t_field_name
== '\0')
1774 = lookup_struct_elt (TYPE_FIELD_TYPE (type
, i
), name
, 1);
1775 if (elt
.field
!= NULL
)
1777 elt
.offset
+= TYPE_FIELD_BITPOS (type
, i
);
1783 /* OK, it's not in this class. Recursively check the baseclasses. */
1784 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1786 struct_elt elt
= lookup_struct_elt (TYPE_BASECLASS (type
, i
), name
, 1);
1787 if (elt
.field
!= NULL
)
1792 return {nullptr, 0};
1794 std::string type_name
= type_to_string (type
);
1795 error (_("Type %s has no component named %s."), type_name
.c_str (), name
);
1798 /* See gdbtypes.h. */
1801 lookup_struct_elt_type (struct type
*type
, const char *name
, int noerr
)
1803 struct_elt elt
= lookup_struct_elt (type
, name
, noerr
);
1804 if (elt
.field
!= NULL
)
1805 return FIELD_TYPE (*elt
.field
);
1810 /* Store in *MAX the largest number representable by unsigned integer type
1814 get_unsigned_type_max (struct type
*type
, ULONGEST
*max
)
1818 type
= check_typedef (type
);
1819 gdb_assert (type
->code () == TYPE_CODE_INT
&& TYPE_UNSIGNED (type
));
1820 gdb_assert (TYPE_LENGTH (type
) <= sizeof (ULONGEST
));
1822 /* Written this way to avoid overflow. */
1823 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1824 *max
= ((((ULONGEST
) 1 << (n
- 1)) - 1) << 1) | 1;
1827 /* Store in *MIN, *MAX the smallest and largest numbers representable by
1828 signed integer type TYPE. */
1831 get_signed_type_minmax (struct type
*type
, LONGEST
*min
, LONGEST
*max
)
1835 type
= check_typedef (type
);
1836 gdb_assert (type
->code () == TYPE_CODE_INT
&& !TYPE_UNSIGNED (type
));
1837 gdb_assert (TYPE_LENGTH (type
) <= sizeof (LONGEST
));
1839 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1840 *min
= -((ULONGEST
) 1 << (n
- 1));
1841 *max
= ((ULONGEST
) 1 << (n
- 1)) - 1;
1844 /* Internal routine called by TYPE_VPTR_FIELDNO to return the value of
1845 cplus_stuff.vptr_fieldno.
1847 cplus_stuff is initialized to cplus_struct_default which does not
1848 set vptr_fieldno to -1 for portability reasons (IWBN to use C99
1849 designated initializers). We cope with that here. */
1852 internal_type_vptr_fieldno (struct type
*type
)
1854 type
= check_typedef (type
);
1855 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1856 || type
->code () == TYPE_CODE_UNION
);
1857 if (!HAVE_CPLUS_STRUCT (type
))
1859 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
;
1862 /* Set the value of cplus_stuff.vptr_fieldno. */
1865 set_type_vptr_fieldno (struct type
*type
, int fieldno
)
1867 type
= check_typedef (type
);
1868 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1869 || type
->code () == TYPE_CODE_UNION
);
1870 if (!HAVE_CPLUS_STRUCT (type
))
1871 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1872 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
= fieldno
;
1875 /* Internal routine called by TYPE_VPTR_BASETYPE to return the value of
1876 cplus_stuff.vptr_basetype. */
1879 internal_type_vptr_basetype (struct type
*type
)
1881 type
= check_typedef (type
);
1882 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1883 || type
->code () == TYPE_CODE_UNION
);
1884 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_CPLUS_STUFF
);
1885 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
;
1888 /* Set the value of cplus_stuff.vptr_basetype. */
1891 set_type_vptr_basetype (struct type
*type
, struct type
*basetype
)
1893 type
= check_typedef (type
);
1894 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1895 || type
->code () == TYPE_CODE_UNION
);
1896 if (!HAVE_CPLUS_STRUCT (type
))
1897 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1898 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
= basetype
;
1901 /* Lookup the vptr basetype/fieldno values for TYPE.
1902 If found store vptr_basetype in *BASETYPEP if non-NULL, and return
1903 vptr_fieldno. Also, if found and basetype is from the same objfile,
1905 If not found, return -1 and ignore BASETYPEP.
1906 Callers should be aware that in some cases (for example,
1907 the type or one of its baseclasses is a stub type and we are
1908 debugging a .o file, or the compiler uses DWARF-2 and is not GCC),
1909 this function will not be able to find the
1910 virtual function table pointer, and vptr_fieldno will remain -1 and
1911 vptr_basetype will remain NULL or incomplete. */
1914 get_vptr_fieldno (struct type
*type
, struct type
**basetypep
)
1916 type
= check_typedef (type
);
1918 if (TYPE_VPTR_FIELDNO (type
) < 0)
1922 /* We must start at zero in case the first (and only) baseclass
1923 is virtual (and hence we cannot share the table pointer). */
1924 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
1926 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
1928 struct type
*basetype
;
1930 fieldno
= get_vptr_fieldno (baseclass
, &basetype
);
1933 /* If the type comes from a different objfile we can't cache
1934 it, it may have a different lifetime. PR 2384 */
1935 if (TYPE_OBJFILE (type
) == TYPE_OBJFILE (basetype
))
1937 set_type_vptr_fieldno (type
, fieldno
);
1938 set_type_vptr_basetype (type
, basetype
);
1941 *basetypep
= basetype
;
1952 *basetypep
= TYPE_VPTR_BASETYPE (type
);
1953 return TYPE_VPTR_FIELDNO (type
);
1958 stub_noname_complaint (void)
1960 complaint (_("stub type has NULL name"));
1963 /* Return nonzero if TYPE has a DYN_PROP_BYTE_STRIDE dynamic property
1964 attached to it, and that property has a non-constant value. */
1967 array_type_has_dynamic_stride (struct type
*type
)
1969 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
1971 return (prop
!= NULL
&& prop
->kind
!= PROP_CONST
);
1974 /* Worker for is_dynamic_type. */
1977 is_dynamic_type_internal (struct type
*type
, int top_level
)
1979 type
= check_typedef (type
);
1981 /* We only want to recognize references at the outermost level. */
1982 if (top_level
&& type
->code () == TYPE_CODE_REF
)
1983 type
= check_typedef (TYPE_TARGET_TYPE (type
));
1985 /* Types that have a dynamic TYPE_DATA_LOCATION are considered
1986 dynamic, even if the type itself is statically defined.
1987 From a user's point of view, this may appear counter-intuitive;
1988 but it makes sense in this context, because the point is to determine
1989 whether any part of the type needs to be resolved before it can
1991 if (TYPE_DATA_LOCATION (type
) != NULL
1992 && (TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCEXPR
1993 || TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCLIST
))
1996 if (TYPE_ASSOCIATED_PROP (type
))
1999 if (TYPE_ALLOCATED_PROP (type
))
2002 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
2003 if (prop
!= nullptr && prop
->kind
!= PROP_TYPE
)
2006 if (TYPE_HAS_DYNAMIC_LENGTH (type
))
2009 switch (type
->code ())
2011 case TYPE_CODE_RANGE
:
2013 /* A range type is obviously dynamic if it has at least one
2014 dynamic bound. But also consider the range type to be
2015 dynamic when its subtype is dynamic, even if the bounds
2016 of the range type are static. It allows us to assume that
2017 the subtype of a static range type is also static. */
2018 return (!has_static_range (TYPE_RANGE_DATA (type
))
2019 || is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0));
2022 case TYPE_CODE_STRING
:
2023 /* Strings are very much like an array of characters, and can be
2024 treated as one here. */
2025 case TYPE_CODE_ARRAY
:
2027 gdb_assert (type
->num_fields () == 1);
2029 /* The array is dynamic if either the bounds are dynamic... */
2030 if (is_dynamic_type_internal (type
->index_type (), 0))
2032 /* ... or the elements it contains have a dynamic contents... */
2033 if (is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0))
2035 /* ... or if it has a dynamic stride... */
2036 if (array_type_has_dynamic_stride (type
))
2041 case TYPE_CODE_STRUCT
:
2042 case TYPE_CODE_UNION
:
2046 bool is_cplus
= HAVE_CPLUS_STRUCT (type
);
2048 for (i
= 0; i
< type
->num_fields (); ++i
)
2050 /* Static fields can be ignored here. */
2051 if (field_is_static (&type
->field (i
)))
2053 /* If the field has dynamic type, then so does TYPE. */
2054 if (is_dynamic_type_internal (TYPE_FIELD_TYPE (type
, i
), 0))
2056 /* If the field is at a fixed offset, then it is not
2058 if (TYPE_FIELD_LOC_KIND (type
, i
) != FIELD_LOC_KIND_DWARF_BLOCK
)
2060 /* Do not consider C++ virtual base types to be dynamic
2061 due to the field's offset being dynamic; these are
2062 handled via other means. */
2063 if (is_cplus
&& BASETYPE_VIA_VIRTUAL (type
, i
))
2074 /* See gdbtypes.h. */
2077 is_dynamic_type (struct type
*type
)
2079 return is_dynamic_type_internal (type
, 1);
2082 static struct type
*resolve_dynamic_type_internal
2083 (struct type
*type
, struct property_addr_info
*addr_stack
, int top_level
);
2085 /* Given a dynamic range type (dyn_range_type) and a stack of
2086 struct property_addr_info elements, return a static version
2089 static struct type
*
2090 resolve_dynamic_range (struct type
*dyn_range_type
,
2091 struct property_addr_info
*addr_stack
)
2094 struct type
*static_range_type
, *static_target_type
;
2095 const struct dynamic_prop
*prop
;
2096 struct dynamic_prop low_bound
, high_bound
, stride
;
2098 gdb_assert (dyn_range_type
->code () == TYPE_CODE_RANGE
);
2100 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->low
;
2101 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2103 low_bound
.kind
= PROP_CONST
;
2104 low_bound
.data
.const_val
= value
;
2108 low_bound
.kind
= PROP_UNDEFINED
;
2109 low_bound
.data
.const_val
= 0;
2112 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->high
;
2113 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2115 high_bound
.kind
= PROP_CONST
;
2116 high_bound
.data
.const_val
= value
;
2118 if (TYPE_RANGE_DATA (dyn_range_type
)->flag_upper_bound_is_count
)
2119 high_bound
.data
.const_val
2120 = low_bound
.data
.const_val
+ high_bound
.data
.const_val
- 1;
2124 high_bound
.kind
= PROP_UNDEFINED
;
2125 high_bound
.data
.const_val
= 0;
2128 bool byte_stride_p
= TYPE_RANGE_DATA (dyn_range_type
)->flag_is_byte_stride
;
2129 prop
= &TYPE_RANGE_DATA (dyn_range_type
)->stride
;
2130 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2132 stride
.kind
= PROP_CONST
;
2133 stride
.data
.const_val
= value
;
2135 /* If we have a bit stride that is not an exact number of bytes then
2136 I really don't think this is going to work with current GDB, the
2137 array indexing code in GDB seems to be pretty heavily tied to byte
2138 offsets right now. Assuming 8 bits in a byte. */
2139 struct gdbarch
*gdbarch
= get_type_arch (dyn_range_type
);
2140 int unit_size
= gdbarch_addressable_memory_unit_size (gdbarch
);
2141 if (!byte_stride_p
&& (value
% (unit_size
* 8)) != 0)
2142 error (_("bit strides that are not a multiple of the byte size "
2143 "are currently not supported"));
2147 stride
.kind
= PROP_UNDEFINED
;
2148 stride
.data
.const_val
= 0;
2149 byte_stride_p
= true;
2153 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (dyn_range_type
),
2155 LONGEST bias
= TYPE_RANGE_DATA (dyn_range_type
)->bias
;
2156 static_range_type
= create_range_type_with_stride
2157 (copy_type (dyn_range_type
), static_target_type
,
2158 &low_bound
, &high_bound
, bias
, &stride
, byte_stride_p
);
2159 TYPE_RANGE_DATA (static_range_type
)->flag_bound_evaluated
= 1;
2160 return static_range_type
;
2163 /* Resolves dynamic bound values of an array or string type TYPE to static
2164 ones. ADDR_STACK is a stack of struct property_addr_info to be used if
2165 needed during the dynamic resolution. */
2167 static struct type
*
2168 resolve_dynamic_array_or_string (struct type
*type
,
2169 struct property_addr_info
*addr_stack
)
2172 struct type
*elt_type
;
2173 struct type
*range_type
;
2174 struct type
*ary_dim
;
2175 struct dynamic_prop
*prop
;
2176 unsigned int bit_stride
= 0;
2178 /* For dynamic type resolution strings can be treated like arrays of
2180 gdb_assert (type
->code () == TYPE_CODE_ARRAY
2181 || type
->code () == TYPE_CODE_STRING
);
2183 type
= copy_type (type
);
2186 range_type
= check_typedef (elt_type
->index_type ());
2187 range_type
= resolve_dynamic_range (range_type
, addr_stack
);
2189 /* Resolve allocated/associated here before creating a new array type, which
2190 will update the length of the array accordingly. */
2191 prop
= TYPE_ALLOCATED_PROP (type
);
2192 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2194 TYPE_DYN_PROP_ADDR (prop
) = value
;
2195 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2197 prop
= TYPE_ASSOCIATED_PROP (type
);
2198 if (prop
!= NULL
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2200 TYPE_DYN_PROP_ADDR (prop
) = value
;
2201 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2204 ary_dim
= check_typedef (TYPE_TARGET_TYPE (elt_type
));
2206 if (ary_dim
!= NULL
&& ary_dim
->code () == TYPE_CODE_ARRAY
)
2207 elt_type
= resolve_dynamic_array_or_string (ary_dim
, addr_stack
);
2209 elt_type
= TYPE_TARGET_TYPE (type
);
2211 prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
2214 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2216 type
->remove_dyn_prop (DYN_PROP_BYTE_STRIDE
);
2217 bit_stride
= (unsigned int) (value
* 8);
2221 /* Could be a bug in our code, but it could also happen
2222 if the DWARF info is not correct. Issue a warning,
2223 and assume no byte/bit stride (leave bit_stride = 0). */
2224 warning (_("cannot determine array stride for type %s"),
2225 type
->name () ? type
->name () : "<no name>");
2229 bit_stride
= TYPE_FIELD_BITSIZE (type
, 0);
2231 return create_array_type_with_stride (type
, elt_type
, range_type
, NULL
,
2235 /* Resolve dynamic bounds of members of the union TYPE to static
2236 bounds. ADDR_STACK is a stack of struct property_addr_info
2237 to be used if needed during the dynamic resolution. */
2239 static struct type
*
2240 resolve_dynamic_union (struct type
*type
,
2241 struct property_addr_info
*addr_stack
)
2243 struct type
*resolved_type
;
2245 unsigned int max_len
= 0;
2247 gdb_assert (type
->code () == TYPE_CODE_UNION
);
2249 resolved_type
= copy_type (type
);
2250 resolved_type
->set_fields
2252 TYPE_ALLOC (resolved_type
,
2253 resolved_type
->num_fields () * sizeof (struct field
)));
2254 memcpy (resolved_type
->fields (),
2256 resolved_type
->num_fields () * sizeof (struct field
));
2257 for (i
= 0; i
< resolved_type
->num_fields (); ++i
)
2261 if (field_is_static (&type
->field (i
)))
2264 t
= resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2266 resolved_type
->field (i
).set_type (t
);
2267 if (TYPE_LENGTH (t
) > max_len
)
2268 max_len
= TYPE_LENGTH (t
);
2271 TYPE_LENGTH (resolved_type
) = max_len
;
2272 return resolved_type
;
2275 /* See gdbtypes.h. */
2278 variant::matches (ULONGEST value
, bool is_unsigned
) const
2280 for (const discriminant_range
&range
: discriminants
)
2281 if (range
.contains (value
, is_unsigned
))
2287 compute_variant_fields_inner (struct type
*type
,
2288 struct property_addr_info
*addr_stack
,
2289 const variant_part
&part
,
2290 std::vector
<bool> &flags
);
2292 /* A helper function to determine which variant fields will be active.
2293 This handles both the variant's direct fields, and any variant
2294 parts embedded in this variant. TYPE is the type we're examining.
2295 ADDR_STACK holds information about the concrete object. VARIANT is
2296 the current variant to be handled. FLAGS is where the results are
2297 stored -- this function sets the Nth element in FLAGS if the
2298 corresponding field is enabled. ENABLED is whether this variant is
2302 compute_variant_fields_recurse (struct type
*type
,
2303 struct property_addr_info
*addr_stack
,
2304 const variant
&variant
,
2305 std::vector
<bool> &flags
,
2308 for (int field
= variant
.first_field
; field
< variant
.last_field
; ++field
)
2309 flags
[field
] = enabled
;
2311 for (const variant_part
&new_part
: variant
.parts
)
2314 compute_variant_fields_inner (type
, addr_stack
, new_part
, flags
);
2317 for (const auto &sub_variant
: new_part
.variants
)
2318 compute_variant_fields_recurse (type
, addr_stack
, sub_variant
,
2324 /* A helper function to determine which variant fields will be active.
2325 This evaluates the discriminant, decides which variant (if any) is
2326 active, and then updates FLAGS to reflect which fields should be
2327 available. TYPE is the type we're examining. ADDR_STACK holds
2328 information about the concrete object. VARIANT is the current
2329 variant to be handled. FLAGS is where the results are stored --
2330 this function sets the Nth element in FLAGS if the corresponding
2331 field is enabled. */
2334 compute_variant_fields_inner (struct type
*type
,
2335 struct property_addr_info
*addr_stack
,
2336 const variant_part
&part
,
2337 std::vector
<bool> &flags
)
2339 /* Evaluate the discriminant. */
2340 gdb::optional
<ULONGEST
> discr_value
;
2341 if (part
.discriminant_index
!= -1)
2343 int idx
= part
.discriminant_index
;
2345 if (TYPE_FIELD_LOC_KIND (type
, idx
) != FIELD_LOC_KIND_BITPOS
)
2346 error (_("Cannot determine struct field location"
2347 " (invalid location kind)"));
2349 if (addr_stack
->valaddr
.data () != NULL
)
2350 discr_value
= unpack_field_as_long (type
, addr_stack
->valaddr
.data (),
2354 CORE_ADDR addr
= (addr_stack
->addr
2355 + (TYPE_FIELD_BITPOS (type
, idx
)
2356 / TARGET_CHAR_BIT
));
2358 LONGEST bitsize
= TYPE_FIELD_BITSIZE (type
, idx
);
2359 LONGEST size
= bitsize
/ 8;
2361 size
= TYPE_LENGTH (TYPE_FIELD_TYPE (type
, idx
));
2363 gdb_byte bits
[sizeof (ULONGEST
)];
2364 read_memory (addr
, bits
, size
);
2366 LONGEST bitpos
= (TYPE_FIELD_BITPOS (type
, idx
)
2369 discr_value
= unpack_bits_as_long (TYPE_FIELD_TYPE (type
, idx
),
2370 bits
, bitpos
, bitsize
);
2374 /* Go through each variant and see which applies. */
2375 const variant
*default_variant
= nullptr;
2376 const variant
*applied_variant
= nullptr;
2377 for (const auto &variant
: part
.variants
)
2379 if (variant
.is_default ())
2380 default_variant
= &variant
;
2381 else if (discr_value
.has_value ()
2382 && variant
.matches (*discr_value
, part
.is_unsigned
))
2384 applied_variant
= &variant
;
2388 if (applied_variant
== nullptr)
2389 applied_variant
= default_variant
;
2391 for (const auto &variant
: part
.variants
)
2392 compute_variant_fields_recurse (type
, addr_stack
, variant
,
2393 flags
, applied_variant
== &variant
);
2396 /* Determine which variant fields are available in TYPE. The enabled
2397 fields are stored in RESOLVED_TYPE. ADDR_STACK holds information
2398 about the concrete object. PARTS describes the top-level variant
2399 parts for this type. */
2402 compute_variant_fields (struct type
*type
,
2403 struct type
*resolved_type
,
2404 struct property_addr_info
*addr_stack
,
2405 const gdb::array_view
<variant_part
> &parts
)
2407 /* Assume all fields are included by default. */
2408 std::vector
<bool> flags (resolved_type
->num_fields (), true);
2410 /* Now disable fields based on the variants that control them. */
2411 for (const auto &part
: parts
)
2412 compute_variant_fields_inner (type
, addr_stack
, part
, flags
);
2414 resolved_type
->set_num_fields
2415 (std::count (flags
.begin (), flags
.end (), true));
2416 resolved_type
->set_fields
2418 TYPE_ALLOC (resolved_type
,
2419 resolved_type
->num_fields () * sizeof (struct field
)));
2422 for (int i
= 0; i
< type
->num_fields (); ++i
)
2427 resolved_type
->field (out
) = type
->field (i
);
2432 /* Resolve dynamic bounds of members of the struct TYPE to static
2433 bounds. ADDR_STACK is a stack of struct property_addr_info to
2434 be used if needed during the dynamic resolution. */
2436 static struct type
*
2437 resolve_dynamic_struct (struct type
*type
,
2438 struct property_addr_info
*addr_stack
)
2440 struct type
*resolved_type
;
2442 unsigned resolved_type_bit_length
= 0;
2444 gdb_assert (type
->code () == TYPE_CODE_STRUCT
);
2445 gdb_assert (type
->num_fields () > 0);
2447 resolved_type
= copy_type (type
);
2449 dynamic_prop
*variant_prop
= resolved_type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
2450 if (variant_prop
!= nullptr && variant_prop
->kind
== PROP_VARIANT_PARTS
)
2452 compute_variant_fields (type
, resolved_type
, addr_stack
,
2453 *variant_prop
->data
.variant_parts
);
2454 /* We want to leave the property attached, so that the Rust code
2455 can tell whether the type was originally an enum. */
2456 variant_prop
->kind
= PROP_TYPE
;
2457 variant_prop
->data
.original_type
= type
;
2461 resolved_type
->set_fields
2463 TYPE_ALLOC (resolved_type
,
2464 resolved_type
->num_fields () * sizeof (struct field
)));
2465 memcpy (resolved_type
->fields (),
2467 resolved_type
->num_fields () * sizeof (struct field
));
2470 for (i
= 0; i
< resolved_type
->num_fields (); ++i
)
2472 unsigned new_bit_length
;
2473 struct property_addr_info pinfo
;
2475 if (field_is_static (&resolved_type
->field (i
)))
2478 if (TYPE_FIELD_LOC_KIND (resolved_type
, i
) == FIELD_LOC_KIND_DWARF_BLOCK
)
2480 struct dwarf2_property_baton baton
;
2482 = lookup_pointer_type (TYPE_FIELD_TYPE (resolved_type
, i
));
2483 baton
.locexpr
= *TYPE_FIELD_DWARF_BLOCK (resolved_type
, i
);
2485 struct dynamic_prop prop
;
2486 prop
.kind
= PROP_LOCEXPR
;
2487 prop
.data
.baton
= &baton
;
2490 if (dwarf2_evaluate_property (&prop
, nullptr, addr_stack
, &addr
,
2492 SET_FIELD_BITPOS (resolved_type
->field (i
),
2493 TARGET_CHAR_BIT
* (addr
- addr_stack
->addr
));
2496 /* As we know this field is not a static field, the field's
2497 field_loc_kind should be FIELD_LOC_KIND_BITPOS. Verify
2498 this is the case, but only trigger a simple error rather
2499 than an internal error if that fails. While failing
2500 that verification indicates a bug in our code, the error
2501 is not severe enough to suggest to the user he stops
2502 his debugging session because of it. */
2503 if (TYPE_FIELD_LOC_KIND (resolved_type
, i
) != FIELD_LOC_KIND_BITPOS
)
2504 error (_("Cannot determine struct field location"
2505 " (invalid location kind)"));
2507 pinfo
.type
= check_typedef (TYPE_FIELD_TYPE (resolved_type
, i
));
2508 pinfo
.valaddr
= addr_stack
->valaddr
;
2511 + (TYPE_FIELD_BITPOS (resolved_type
, i
) / TARGET_CHAR_BIT
));
2512 pinfo
.next
= addr_stack
;
2514 resolved_type
->field (i
).set_type
2515 (resolve_dynamic_type_internal (TYPE_FIELD_TYPE (resolved_type
, i
),
2517 gdb_assert (TYPE_FIELD_LOC_KIND (resolved_type
, i
)
2518 == FIELD_LOC_KIND_BITPOS
);
2520 new_bit_length
= TYPE_FIELD_BITPOS (resolved_type
, i
);
2521 if (TYPE_FIELD_BITSIZE (resolved_type
, i
) != 0)
2522 new_bit_length
+= TYPE_FIELD_BITSIZE (resolved_type
, i
);
2524 new_bit_length
+= (TYPE_LENGTH (TYPE_FIELD_TYPE (resolved_type
, i
))
2527 /* Normally, we would use the position and size of the last field
2528 to determine the size of the enclosing structure. But GCC seems
2529 to be encoding the position of some fields incorrectly when
2530 the struct contains a dynamic field that is not placed last.
2531 So we compute the struct size based on the field that has
2532 the highest position + size - probably the best we can do. */
2533 if (new_bit_length
> resolved_type_bit_length
)
2534 resolved_type_bit_length
= new_bit_length
;
2537 /* The length of a type won't change for fortran, but it does for C and Ada.
2538 For fortran the size of dynamic fields might change over time but not the
2539 type length of the structure. If we adapt it, we run into problems
2540 when calculating the element offset for arrays of structs. */
2541 if (current_language
->la_language
!= language_fortran
)
2542 TYPE_LENGTH (resolved_type
)
2543 = (resolved_type_bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2545 /* The Ada language uses this field as a cache for static fixed types: reset
2546 it as RESOLVED_TYPE must have its own static fixed type. */
2547 TYPE_TARGET_TYPE (resolved_type
) = NULL
;
2549 return resolved_type
;
2552 /* Worker for resolved_dynamic_type. */
2554 static struct type
*
2555 resolve_dynamic_type_internal (struct type
*type
,
2556 struct property_addr_info
*addr_stack
,
2559 struct type
*real_type
= check_typedef (type
);
2560 struct type
*resolved_type
= nullptr;
2561 struct dynamic_prop
*prop
;
2564 if (!is_dynamic_type_internal (real_type
, top_level
))
2567 gdb::optional
<CORE_ADDR
> type_length
;
2568 prop
= TYPE_DYNAMIC_LENGTH (type
);
2570 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2571 type_length
= value
;
2573 if (type
->code () == TYPE_CODE_TYPEDEF
)
2575 resolved_type
= copy_type (type
);
2576 TYPE_TARGET_TYPE (resolved_type
)
2577 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
), addr_stack
,
2582 /* Before trying to resolve TYPE, make sure it is not a stub. */
2585 switch (type
->code ())
2589 struct property_addr_info pinfo
;
2591 pinfo
.type
= check_typedef (TYPE_TARGET_TYPE (type
));
2593 if (addr_stack
->valaddr
.data () != NULL
)
2594 pinfo
.addr
= extract_typed_address (addr_stack
->valaddr
.data (),
2597 pinfo
.addr
= read_memory_typed_address (addr_stack
->addr
, type
);
2598 pinfo
.next
= addr_stack
;
2600 resolved_type
= copy_type (type
);
2601 TYPE_TARGET_TYPE (resolved_type
)
2602 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
),
2607 case TYPE_CODE_STRING
:
2608 /* Strings are very much like an array of characters, and can be
2609 treated as one here. */
2610 case TYPE_CODE_ARRAY
:
2611 resolved_type
= resolve_dynamic_array_or_string (type
, addr_stack
);
2614 case TYPE_CODE_RANGE
:
2615 resolved_type
= resolve_dynamic_range (type
, addr_stack
);
2618 case TYPE_CODE_UNION
:
2619 resolved_type
= resolve_dynamic_union (type
, addr_stack
);
2622 case TYPE_CODE_STRUCT
:
2623 resolved_type
= resolve_dynamic_struct (type
, addr_stack
);
2628 if (resolved_type
== nullptr)
2631 if (type_length
.has_value ())
2633 TYPE_LENGTH (resolved_type
) = *type_length
;
2634 resolved_type
->remove_dyn_prop (DYN_PROP_BYTE_SIZE
);
2637 /* Resolve data_location attribute. */
2638 prop
= TYPE_DATA_LOCATION (resolved_type
);
2640 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2642 TYPE_DYN_PROP_ADDR (prop
) = value
;
2643 TYPE_DYN_PROP_KIND (prop
) = PROP_CONST
;
2646 return resolved_type
;
2649 /* See gdbtypes.h */
2652 resolve_dynamic_type (struct type
*type
,
2653 gdb::array_view
<const gdb_byte
> valaddr
,
2656 struct property_addr_info pinfo
2657 = {check_typedef (type
), valaddr
, addr
, NULL
};
2659 return resolve_dynamic_type_internal (type
, &pinfo
, 1);
2662 /* See gdbtypes.h */
2665 type::dyn_prop (dynamic_prop_node_kind prop_kind
) const
2667 dynamic_prop_list
*node
= this->main_type
->dyn_prop_list
;
2669 while (node
!= NULL
)
2671 if (node
->prop_kind
== prop_kind
)
2678 /* See gdbtypes.h */
2681 type::add_dyn_prop (dynamic_prop_node_kind prop_kind
, dynamic_prop prop
)
2683 struct dynamic_prop_list
*temp
;
2685 gdb_assert (TYPE_OBJFILE_OWNED (this));
2687 temp
= XOBNEW (&TYPE_OBJFILE (this)->objfile_obstack
,
2688 struct dynamic_prop_list
);
2689 temp
->prop_kind
= prop_kind
;
2691 temp
->next
= this->main_type
->dyn_prop_list
;
2693 this->main_type
->dyn_prop_list
= temp
;
2696 /* See gdbtypes.h. */
2699 type::remove_dyn_prop (dynamic_prop_node_kind kind
)
2701 struct dynamic_prop_list
*prev_node
, *curr_node
;
2703 curr_node
= this->main_type
->dyn_prop_list
;
2706 while (NULL
!= curr_node
)
2708 if (curr_node
->prop_kind
== kind
)
2710 /* Update the linked list but don't free anything.
2711 The property was allocated on objstack and it is not known
2712 if we are on top of it. Nevertheless, everything is released
2713 when the complete objstack is freed. */
2714 if (NULL
== prev_node
)
2715 this->main_type
->dyn_prop_list
= curr_node
->next
;
2717 prev_node
->next
= curr_node
->next
;
2722 prev_node
= curr_node
;
2723 curr_node
= curr_node
->next
;
2727 /* Find the real type of TYPE. This function returns the real type,
2728 after removing all layers of typedefs, and completing opaque or stub
2729 types. Completion changes the TYPE argument, but stripping of
2732 Instance flags (e.g. const/volatile) are preserved as typedefs are
2733 stripped. If necessary a new qualified form of the underlying type
2736 NOTE: This will return a typedef if TYPE_TARGET_TYPE for the typedef has
2737 not been computed and we're either in the middle of reading symbols, or
2738 there was no name for the typedef in the debug info.
2740 NOTE: Lookup of opaque types can throw errors for invalid symbol files.
2741 QUITs in the symbol reading code can also throw.
2742 Thus this function can throw an exception.
2744 If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
2747 If this is a stubbed struct (i.e. declared as struct foo *), see if
2748 we can find a full definition in some other file. If so, copy this
2749 definition, so we can use it in future. There used to be a comment
2750 (but not any code) that if we don't find a full definition, we'd
2751 set a flag so we don't spend time in the future checking the same
2752 type. That would be a mistake, though--we might load in more
2753 symbols which contain a full definition for the type. */
2756 check_typedef (struct type
*type
)
2758 struct type
*orig_type
= type
;
2759 /* While we're removing typedefs, we don't want to lose qualifiers.
2760 E.g., const/volatile. */
2761 int instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2765 while (type
->code () == TYPE_CODE_TYPEDEF
)
2767 if (!TYPE_TARGET_TYPE (type
))
2772 /* It is dangerous to call lookup_symbol if we are currently
2773 reading a symtab. Infinite recursion is one danger. */
2774 if (currently_reading_symtab
)
2775 return make_qualified_type (type
, instance_flags
, NULL
);
2777 name
= type
->name ();
2778 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or
2779 VAR_DOMAIN as appropriate? */
2782 stub_noname_complaint ();
2783 return make_qualified_type (type
, instance_flags
, NULL
);
2785 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2787 TYPE_TARGET_TYPE (type
) = SYMBOL_TYPE (sym
);
2788 else /* TYPE_CODE_UNDEF */
2789 TYPE_TARGET_TYPE (type
) = alloc_type_arch (get_type_arch (type
));
2791 type
= TYPE_TARGET_TYPE (type
);
2793 /* Preserve the instance flags as we traverse down the typedef chain.
2795 Handling address spaces/classes is nasty, what do we do if there's a
2797 E.g., what if an outer typedef marks the type as class_1 and an inner
2798 typedef marks the type as class_2?
2799 This is the wrong place to do such error checking. We leave it to
2800 the code that created the typedef in the first place to flag the
2801 error. We just pick the outer address space (akin to letting the
2802 outer cast in a chain of casting win), instead of assuming
2803 "it can't happen". */
2805 const int ALL_SPACES
= (TYPE_INSTANCE_FLAG_CODE_SPACE
2806 | TYPE_INSTANCE_FLAG_DATA_SPACE
);
2807 const int ALL_CLASSES
= TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
;
2808 int new_instance_flags
= TYPE_INSTANCE_FLAGS (type
);
2810 /* Treat code vs data spaces and address classes separately. */
2811 if ((instance_flags
& ALL_SPACES
) != 0)
2812 new_instance_flags
&= ~ALL_SPACES
;
2813 if ((instance_flags
& ALL_CLASSES
) != 0)
2814 new_instance_flags
&= ~ALL_CLASSES
;
2816 instance_flags
|= new_instance_flags
;
2820 /* If this is a struct/class/union with no fields, then check
2821 whether a full definition exists somewhere else. This is for
2822 systems where a type definition with no fields is issued for such
2823 types, instead of identifying them as stub types in the first
2826 if (TYPE_IS_OPAQUE (type
)
2827 && opaque_type_resolution
2828 && !currently_reading_symtab
)
2830 const char *name
= type
->name ();
2831 struct type
*newtype
;
2835 stub_noname_complaint ();
2836 return make_qualified_type (type
, instance_flags
, NULL
);
2838 newtype
= lookup_transparent_type (name
);
2842 /* If the resolved type and the stub are in the same
2843 objfile, then replace the stub type with the real deal.
2844 But if they're in separate objfiles, leave the stub
2845 alone; we'll just look up the transparent type every time
2846 we call check_typedef. We can't create pointers between
2847 types allocated to different objfiles, since they may
2848 have different lifetimes. Trying to copy NEWTYPE over to
2849 TYPE's objfile is pointless, too, since you'll have to
2850 move over any other types NEWTYPE refers to, which could
2851 be an unbounded amount of stuff. */
2852 if (TYPE_OBJFILE (newtype
) == TYPE_OBJFILE (type
))
2853 type
= make_qualified_type (newtype
,
2854 TYPE_INSTANCE_FLAGS (type
),
2860 /* Otherwise, rely on the stub flag being set for opaque/stubbed
2862 else if (TYPE_STUB (type
) && !currently_reading_symtab
)
2864 const char *name
= type
->name ();
2865 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or VAR_DOMAIN
2871 stub_noname_complaint ();
2872 return make_qualified_type (type
, instance_flags
, NULL
);
2874 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2877 /* Same as above for opaque types, we can replace the stub
2878 with the complete type only if they are in the same
2880 if (TYPE_OBJFILE (SYMBOL_TYPE (sym
)) == TYPE_OBJFILE (type
))
2881 type
= make_qualified_type (SYMBOL_TYPE (sym
),
2882 TYPE_INSTANCE_FLAGS (type
),
2885 type
= SYMBOL_TYPE (sym
);
2889 if (TYPE_TARGET_STUB (type
))
2891 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
2893 if (TYPE_STUB (target_type
) || TYPE_TARGET_STUB (target_type
))
2895 /* Nothing we can do. */
2897 else if (type
->code () == TYPE_CODE_RANGE
)
2899 TYPE_LENGTH (type
) = TYPE_LENGTH (target_type
);
2900 TYPE_TARGET_STUB (type
) = 0;
2902 else if (type
->code () == TYPE_CODE_ARRAY
2903 && update_static_array_size (type
))
2904 TYPE_TARGET_STUB (type
) = 0;
2907 type
= make_qualified_type (type
, instance_flags
, NULL
);
2909 /* Cache TYPE_LENGTH for future use. */
2910 TYPE_LENGTH (orig_type
) = TYPE_LENGTH (type
);
2915 /* Parse a type expression in the string [P..P+LENGTH). If an error
2916 occurs, silently return a void type. */
2918 static struct type
*
2919 safe_parse_type (struct gdbarch
*gdbarch
, char *p
, int length
)
2921 struct ui_file
*saved_gdb_stderr
;
2922 struct type
*type
= NULL
; /* Initialize to keep gcc happy. */
2924 /* Suppress error messages. */
2925 saved_gdb_stderr
= gdb_stderr
;
2926 gdb_stderr
= &null_stream
;
2928 /* Call parse_and_eval_type() without fear of longjmp()s. */
2931 type
= parse_and_eval_type (p
, length
);
2933 catch (const gdb_exception_error
&except
)
2935 type
= builtin_type (gdbarch
)->builtin_void
;
2938 /* Stop suppressing error messages. */
2939 gdb_stderr
= saved_gdb_stderr
;
2944 /* Ugly hack to convert method stubs into method types.
2946 He ain't kiddin'. This demangles the name of the method into a
2947 string including argument types, parses out each argument type,
2948 generates a string casting a zero to that type, evaluates the
2949 string, and stuffs the resulting type into an argtype vector!!!
2950 Then it knows the type of the whole function (including argument
2951 types for overloading), which info used to be in the stab's but was
2952 removed to hack back the space required for them. */
2955 check_stub_method (struct type
*type
, int method_id
, int signature_id
)
2957 struct gdbarch
*gdbarch
= get_type_arch (type
);
2959 char *mangled_name
= gdb_mangle_name (type
, method_id
, signature_id
);
2960 char *demangled_name
= gdb_demangle (mangled_name
,
2961 DMGL_PARAMS
| DMGL_ANSI
);
2962 char *argtypetext
, *p
;
2963 int depth
= 0, argcount
= 1;
2964 struct field
*argtypes
;
2967 /* Make sure we got back a function string that we can use. */
2969 p
= strchr (demangled_name
, '(');
2973 if (demangled_name
== NULL
|| p
== NULL
)
2974 error (_("Internal: Cannot demangle mangled name `%s'."),
2977 /* Now, read in the parameters that define this type. */
2982 if (*p
== '(' || *p
== '<')
2986 else if (*p
== ')' || *p
== '>')
2990 else if (*p
== ',' && depth
== 0)
2998 /* If we read one argument and it was ``void'', don't count it. */
2999 if (startswith (argtypetext
, "(void)"))
3002 /* We need one extra slot, for the THIS pointer. */
3004 argtypes
= (struct field
*)
3005 TYPE_ALLOC (type
, (argcount
+ 1) * sizeof (struct field
));
3008 /* Add THIS pointer for non-static methods. */
3009 f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3010 if (TYPE_FN_FIELD_STATIC_P (f
, signature_id
))
3014 argtypes
[0].set_type (lookup_pointer_type (type
));
3018 if (*p
!= ')') /* () means no args, skip while. */
3023 if (depth
<= 0 && (*p
== ',' || *p
== ')'))
3025 /* Avoid parsing of ellipsis, they will be handled below.
3026 Also avoid ``void'' as above. */
3027 if (strncmp (argtypetext
, "...", p
- argtypetext
) != 0
3028 && strncmp (argtypetext
, "void", p
- argtypetext
) != 0)
3030 argtypes
[argcount
].set_type
3031 (safe_parse_type (gdbarch
, argtypetext
, p
- argtypetext
));
3034 argtypetext
= p
+ 1;
3037 if (*p
== '(' || *p
== '<')
3041 else if (*p
== ')' || *p
== '>')
3050 TYPE_FN_FIELD_PHYSNAME (f
, signature_id
) = mangled_name
;
3052 /* Now update the old "stub" type into a real type. */
3053 mtype
= TYPE_FN_FIELD_TYPE (f
, signature_id
);
3054 /* MTYPE may currently be a function (TYPE_CODE_FUNC).
3055 We want a method (TYPE_CODE_METHOD). */
3056 smash_to_method_type (mtype
, type
, TYPE_TARGET_TYPE (mtype
),
3057 argtypes
, argcount
, p
[-2] == '.');
3058 TYPE_STUB (mtype
) = 0;
3059 TYPE_FN_FIELD_STUB (f
, signature_id
) = 0;
3061 xfree (demangled_name
);
3064 /* This is the external interface to check_stub_method, above. This
3065 function unstubs all of the signatures for TYPE's METHOD_ID method
3066 name. After calling this function TYPE_FN_FIELD_STUB will be
3067 cleared for each signature and TYPE_FN_FIELDLIST_NAME will be
3070 This function unfortunately can not die until stabs do. */
3073 check_stub_method_group (struct type
*type
, int method_id
)
3075 int len
= TYPE_FN_FIELDLIST_LENGTH (type
, method_id
);
3076 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3078 for (int j
= 0; j
< len
; j
++)
3080 if (TYPE_FN_FIELD_STUB (f
, j
))
3081 check_stub_method (type
, method_id
, j
);
3085 /* Ensure it is in .rodata (if available) by working around GCC PR 44690. */
3086 const struct cplus_struct_type cplus_struct_default
= { };
3089 allocate_cplus_struct_type (struct type
*type
)
3091 if (HAVE_CPLUS_STRUCT (type
))
3092 /* Structure was already allocated. Nothing more to do. */
3095 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_CPLUS_STUFF
;
3096 TYPE_RAW_CPLUS_SPECIFIC (type
) = (struct cplus_struct_type
*)
3097 TYPE_ALLOC (type
, sizeof (struct cplus_struct_type
));
3098 *(TYPE_RAW_CPLUS_SPECIFIC (type
)) = cplus_struct_default
;
3099 set_type_vptr_fieldno (type
, -1);
3102 const struct gnat_aux_type gnat_aux_default
=
3105 /* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
3106 and allocate the associated gnat-specific data. The gnat-specific
3107 data is also initialized to gnat_aux_default. */
3110 allocate_gnat_aux_type (struct type
*type
)
3112 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_GNAT_STUFF
;
3113 TYPE_GNAT_SPECIFIC (type
) = (struct gnat_aux_type
*)
3114 TYPE_ALLOC (type
, sizeof (struct gnat_aux_type
));
3115 *(TYPE_GNAT_SPECIFIC (type
)) = gnat_aux_default
;
3118 /* Helper function to initialize a newly allocated type. Set type code
3119 to CODE and initialize the type-specific fields accordingly. */
3122 set_type_code (struct type
*type
, enum type_code code
)
3124 type
->set_code (code
);
3128 case TYPE_CODE_STRUCT
:
3129 case TYPE_CODE_UNION
:
3130 case TYPE_CODE_NAMESPACE
:
3131 INIT_CPLUS_SPECIFIC (type
);
3134 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_FLOATFORMAT
;
3136 case TYPE_CODE_FUNC
:
3137 INIT_FUNC_SPECIFIC (type
);
3142 /* Helper function to verify floating-point format and size.
3143 BIT is the type size in bits; if BIT equals -1, the size is
3144 determined by the floatformat. Returns size to be used. */
3147 verify_floatformat (int bit
, const struct floatformat
*floatformat
)
3149 gdb_assert (floatformat
!= NULL
);
3152 bit
= floatformat
->totalsize
;
3154 gdb_assert (bit
>= 0);
3155 gdb_assert (bit
>= floatformat
->totalsize
);
3160 /* Return the floating-point format for a floating-point variable of
3163 const struct floatformat
*
3164 floatformat_from_type (const struct type
*type
)
3166 gdb_assert (type
->code () == TYPE_CODE_FLT
);
3167 gdb_assert (TYPE_FLOATFORMAT (type
));
3168 return TYPE_FLOATFORMAT (type
);
3171 /* Helper function to initialize the standard scalar types.
3173 If NAME is non-NULL, then it is used to initialize the type name.
3174 Note that NAME is not copied; it is required to have a lifetime at
3175 least as long as OBJFILE. */
3178 init_type (struct objfile
*objfile
, enum type_code code
, int bit
,
3183 type
= alloc_type (objfile
);
3184 set_type_code (type
, code
);
3185 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
3186 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
3187 type
->set_name (name
);
3192 /* Allocate a TYPE_CODE_ERROR type structure associated with OBJFILE,
3193 to use with variables that have no debug info. NAME is the type
3196 static struct type
*
3197 init_nodebug_var_type (struct objfile
*objfile
, const char *name
)
3199 return init_type (objfile
, TYPE_CODE_ERROR
, 0, name
);
3202 /* Allocate a TYPE_CODE_INT type structure associated with OBJFILE.
3203 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3204 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3207 init_integer_type (struct objfile
*objfile
,
3208 int bit
, int unsigned_p
, const char *name
)
3212 t
= init_type (objfile
, TYPE_CODE_INT
, bit
, name
);
3214 TYPE_UNSIGNED (t
) = 1;
3219 /* Allocate a TYPE_CODE_CHAR type structure associated with OBJFILE.
3220 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3221 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3224 init_character_type (struct objfile
*objfile
,
3225 int bit
, int unsigned_p
, const char *name
)
3229 t
= init_type (objfile
, TYPE_CODE_CHAR
, bit
, name
);
3231 TYPE_UNSIGNED (t
) = 1;
3236 /* Allocate a TYPE_CODE_BOOL type structure associated with OBJFILE.
3237 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3238 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3241 init_boolean_type (struct objfile
*objfile
,
3242 int bit
, int unsigned_p
, const char *name
)
3246 t
= init_type (objfile
, TYPE_CODE_BOOL
, bit
, name
);
3248 TYPE_UNSIGNED (t
) = 1;
3253 /* Allocate a TYPE_CODE_FLT type structure associated with OBJFILE.
3254 BIT is the type size in bits; if BIT equals -1, the size is
3255 determined by the floatformat. NAME is the type name. Set the
3256 TYPE_FLOATFORMAT from FLOATFORMATS. BYTE_ORDER is the byte order
3257 to use. If it is BFD_ENDIAN_UNKNOWN (the default), then the byte
3258 order of the objfile's architecture is used. */
3261 init_float_type (struct objfile
*objfile
,
3262 int bit
, const char *name
,
3263 const struct floatformat
**floatformats
,
3264 enum bfd_endian byte_order
)
3266 if (byte_order
== BFD_ENDIAN_UNKNOWN
)
3268 struct gdbarch
*gdbarch
= objfile
->arch ();
3269 byte_order
= gdbarch_byte_order (gdbarch
);
3271 const struct floatformat
*fmt
= floatformats
[byte_order
];
3274 bit
= verify_floatformat (bit
, fmt
);
3275 t
= init_type (objfile
, TYPE_CODE_FLT
, bit
, name
);
3276 TYPE_FLOATFORMAT (t
) = fmt
;
3281 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with OBJFILE.
3282 BIT is the type size in bits. NAME is the type name. */
3285 init_decfloat_type (struct objfile
*objfile
, int bit
, const char *name
)
3289 t
= init_type (objfile
, TYPE_CODE_DECFLOAT
, bit
, name
);
3293 /* Allocate a TYPE_CODE_COMPLEX type structure. NAME is the type
3294 name. TARGET_TYPE is the component type. */
3297 init_complex_type (const char *name
, struct type
*target_type
)
3301 gdb_assert (target_type
->code () == TYPE_CODE_INT
3302 || target_type
->code () == TYPE_CODE_FLT
);
3304 if (TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
== nullptr)
3306 if (name
== nullptr)
3309 = (char *) TYPE_ALLOC (target_type
,
3310 strlen (target_type
->name ())
3311 + strlen ("_Complex ") + 1);
3312 strcpy (new_name
, "_Complex ");
3313 strcat (new_name
, target_type
->name ());
3317 t
= alloc_type_copy (target_type
);
3318 set_type_code (t
, TYPE_CODE_COMPLEX
);
3319 TYPE_LENGTH (t
) = 2 * TYPE_LENGTH (target_type
);
3322 TYPE_TARGET_TYPE (t
) = target_type
;
3323 TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
= t
;
3326 return TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
;
3329 /* Allocate a TYPE_CODE_PTR type structure associated with OBJFILE.
3330 BIT is the pointer type size in bits. NAME is the type name.
3331 TARGET_TYPE is the pointer target type. Always sets the pointer type's
3332 TYPE_UNSIGNED flag. */
3335 init_pointer_type (struct objfile
*objfile
,
3336 int bit
, const char *name
, struct type
*target_type
)
3340 t
= init_type (objfile
, TYPE_CODE_PTR
, bit
, name
);
3341 TYPE_TARGET_TYPE (t
) = target_type
;
3342 TYPE_UNSIGNED (t
) = 1;
3346 /* See gdbtypes.h. */
3349 type_raw_align (struct type
*type
)
3351 if (type
->align_log2
!= 0)
3352 return 1 << (type
->align_log2
- 1);
3356 /* See gdbtypes.h. */
3359 type_align (struct type
*type
)
3361 /* Check alignment provided in the debug information. */
3362 unsigned raw_align
= type_raw_align (type
);
3366 /* Allow the architecture to provide an alignment. */
3367 struct gdbarch
*arch
= get_type_arch (type
);
3368 ULONGEST align
= gdbarch_type_align (arch
, type
);
3372 switch (type
->code ())
3375 case TYPE_CODE_FUNC
:
3376 case TYPE_CODE_FLAGS
:
3378 case TYPE_CODE_RANGE
:
3380 case TYPE_CODE_ENUM
:
3382 case TYPE_CODE_RVALUE_REF
:
3383 case TYPE_CODE_CHAR
:
3384 case TYPE_CODE_BOOL
:
3385 case TYPE_CODE_DECFLOAT
:
3386 case TYPE_CODE_METHODPTR
:
3387 case TYPE_CODE_MEMBERPTR
:
3388 align
= type_length_units (check_typedef (type
));
3391 case TYPE_CODE_ARRAY
:
3392 case TYPE_CODE_COMPLEX
:
3393 case TYPE_CODE_TYPEDEF
:
3394 align
= type_align (TYPE_TARGET_TYPE (type
));
3397 case TYPE_CODE_STRUCT
:
3398 case TYPE_CODE_UNION
:
3400 int number_of_non_static_fields
= 0;
3401 for (unsigned i
= 0; i
< type
->num_fields (); ++i
)
3403 if (!field_is_static (&type
->field (i
)))
3405 number_of_non_static_fields
++;
3406 ULONGEST f_align
= type_align (TYPE_FIELD_TYPE (type
, i
));
3409 /* Don't pretend we know something we don't. */
3413 if (f_align
> align
)
3417 /* A struct with no fields, or with only static fields has an
3419 if (number_of_non_static_fields
== 0)
3425 case TYPE_CODE_STRING
:
3426 /* Not sure what to do here, and these can't appear in C or C++
3430 case TYPE_CODE_VOID
:
3434 case TYPE_CODE_ERROR
:
3435 case TYPE_CODE_METHOD
:
3440 if ((align
& (align
- 1)) != 0)
3442 /* Not a power of 2, so pass. */
3449 /* See gdbtypes.h. */
3452 set_type_align (struct type
*type
, ULONGEST align
)
3454 /* Must be a power of 2. Zero is ok. */
3455 gdb_assert ((align
& (align
- 1)) == 0);
3457 unsigned result
= 0;
3464 if (result
>= (1 << TYPE_ALIGN_BITS
))
3467 type
->align_log2
= result
;
3472 /* Queries on types. */
3475 can_dereference (struct type
*t
)
3477 /* FIXME: Should we return true for references as well as
3479 t
= check_typedef (t
);
3482 && t
->code () == TYPE_CODE_PTR
3483 && TYPE_TARGET_TYPE (t
)->code () != TYPE_CODE_VOID
);
3487 is_integral_type (struct type
*t
)
3489 t
= check_typedef (t
);
3492 && ((t
->code () == TYPE_CODE_INT
)
3493 || (t
->code () == TYPE_CODE_ENUM
)
3494 || (t
->code () == TYPE_CODE_FLAGS
)
3495 || (t
->code () == TYPE_CODE_CHAR
)
3496 || (t
->code () == TYPE_CODE_RANGE
)
3497 || (t
->code () == TYPE_CODE_BOOL
)));
3501 is_floating_type (struct type
*t
)
3503 t
= check_typedef (t
);
3506 && ((t
->code () == TYPE_CODE_FLT
)
3507 || (t
->code () == TYPE_CODE_DECFLOAT
)));
3510 /* Return true if TYPE is scalar. */
3513 is_scalar_type (struct type
*type
)
3515 type
= check_typedef (type
);
3517 switch (type
->code ())
3519 case TYPE_CODE_ARRAY
:
3520 case TYPE_CODE_STRUCT
:
3521 case TYPE_CODE_UNION
:
3523 case TYPE_CODE_STRING
:
3530 /* Return true if T is scalar, or a composite type which in practice has
3531 the memory layout of a scalar type. E.g., an array or struct with only
3532 one scalar element inside it, or a union with only scalar elements. */
3535 is_scalar_type_recursive (struct type
*t
)
3537 t
= check_typedef (t
);
3539 if (is_scalar_type (t
))
3541 /* Are we dealing with an array or string of known dimensions? */
3542 else if ((t
->code () == TYPE_CODE_ARRAY
3543 || t
->code () == TYPE_CODE_STRING
) && t
->num_fields () == 1
3544 && t
->index_type ()->code () == TYPE_CODE_RANGE
)
3546 LONGEST low_bound
, high_bound
;
3547 struct type
*elt_type
= check_typedef (TYPE_TARGET_TYPE (t
));
3549 get_discrete_bounds (t
->index_type (), &low_bound
, &high_bound
);
3551 return high_bound
== low_bound
&& is_scalar_type_recursive (elt_type
);
3553 /* Are we dealing with a struct with one element? */
3554 else if (t
->code () == TYPE_CODE_STRUCT
&& t
->num_fields () == 1)
3555 return is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, 0));
3556 else if (t
->code () == TYPE_CODE_UNION
)
3558 int i
, n
= t
->num_fields ();
3560 /* If all elements of the union are scalar, then the union is scalar. */
3561 for (i
= 0; i
< n
; i
++)
3562 if (!is_scalar_type_recursive (TYPE_FIELD_TYPE (t
, i
)))
3571 /* Return true is T is a class or a union. False otherwise. */
3574 class_or_union_p (const struct type
*t
)
3576 return (t
->code () == TYPE_CODE_STRUCT
3577 || t
->code () == TYPE_CODE_UNION
);
3580 /* A helper function which returns true if types A and B represent the
3581 "same" class type. This is true if the types have the same main
3582 type, or the same name. */
3585 class_types_same_p (const struct type
*a
, const struct type
*b
)
3587 return (TYPE_MAIN_TYPE (a
) == TYPE_MAIN_TYPE (b
)
3588 || (a
->name () && b
->name ()
3589 && !strcmp (a
->name (), b
->name ())));
3592 /* If BASE is an ancestor of DCLASS return the distance between them.
3593 otherwise return -1;
3597 class B: public A {};
3598 class C: public B {};
3601 distance_to_ancestor (A, A, 0) = 0
3602 distance_to_ancestor (A, B, 0) = 1
3603 distance_to_ancestor (A, C, 0) = 2
3604 distance_to_ancestor (A, D, 0) = 3
3606 If PUBLIC is 1 then only public ancestors are considered,
3607 and the function returns the distance only if BASE is a public ancestor
3611 distance_to_ancestor (A, D, 1) = -1. */
3614 distance_to_ancestor (struct type
*base
, struct type
*dclass
, int is_public
)
3619 base
= check_typedef (base
);
3620 dclass
= check_typedef (dclass
);
3622 if (class_types_same_p (base
, dclass
))
3625 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
); i
++)
3627 if (is_public
&& ! BASETYPE_VIA_PUBLIC (dclass
, i
))
3630 d
= distance_to_ancestor (base
, TYPE_BASECLASS (dclass
, i
), is_public
);
3638 /* Check whether BASE is an ancestor or base class or DCLASS
3639 Return 1 if so, and 0 if not.
3640 Note: If BASE and DCLASS are of the same type, this function
3641 will return 1. So for some class A, is_ancestor (A, A) will
3645 is_ancestor (struct type
*base
, struct type
*dclass
)
3647 return distance_to_ancestor (base
, dclass
, 0) >= 0;
3650 /* Like is_ancestor, but only returns true when BASE is a public
3651 ancestor of DCLASS. */
3654 is_public_ancestor (struct type
*base
, struct type
*dclass
)
3656 return distance_to_ancestor (base
, dclass
, 1) >= 0;
3659 /* A helper function for is_unique_ancestor. */
3662 is_unique_ancestor_worker (struct type
*base
, struct type
*dclass
,
3664 const gdb_byte
*valaddr
, int embedded_offset
,
3665 CORE_ADDR address
, struct value
*val
)
3669 base
= check_typedef (base
);
3670 dclass
= check_typedef (dclass
);
3672 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
) && count
< 2; ++i
)
3677 iter
= check_typedef (TYPE_BASECLASS (dclass
, i
));
3679 this_offset
= baseclass_offset (dclass
, i
, valaddr
, embedded_offset
,
3682 if (class_types_same_p (base
, iter
))
3684 /* If this is the first subclass, set *OFFSET and set count
3685 to 1. Otherwise, if this is at the same offset as
3686 previous instances, do nothing. Otherwise, increment
3690 *offset
= this_offset
;
3693 else if (this_offset
== *offset
)
3701 count
+= is_unique_ancestor_worker (base
, iter
, offset
,
3703 embedded_offset
+ this_offset
,
3710 /* Like is_ancestor, but only returns true if BASE is a unique base
3711 class of the type of VAL. */
3714 is_unique_ancestor (struct type
*base
, struct value
*val
)
3718 return is_unique_ancestor_worker (base
, value_type (val
), &offset
,
3719 value_contents_for_printing (val
),
3720 value_embedded_offset (val
),
3721 value_address (val
), val
) == 1;
3724 /* See gdbtypes.h. */
3727 type_byte_order (const struct type
*type
)
3729 bfd_endian byteorder
= gdbarch_byte_order (get_type_arch (type
));
3730 if (TYPE_ENDIANITY_NOT_DEFAULT (type
))
3732 if (byteorder
== BFD_ENDIAN_BIG
)
3733 return BFD_ENDIAN_LITTLE
;
3736 gdb_assert (byteorder
== BFD_ENDIAN_LITTLE
);
3737 return BFD_ENDIAN_BIG
;
3745 /* Overload resolution. */
3747 /* Return the sum of the rank of A with the rank of B. */
3750 sum_ranks (struct rank a
, struct rank b
)
3753 c
.rank
= a
.rank
+ b
.rank
;
3754 c
.subrank
= a
.subrank
+ b
.subrank
;
3758 /* Compare rank A and B and return:
3760 1 if a is better than b
3761 -1 if b is better than a. */
3764 compare_ranks (struct rank a
, struct rank b
)
3766 if (a
.rank
== b
.rank
)
3768 if (a
.subrank
== b
.subrank
)
3770 if (a
.subrank
< b
.subrank
)
3772 if (a
.subrank
> b
.subrank
)
3776 if (a
.rank
< b
.rank
)
3779 /* a.rank > b.rank */
3783 /* Functions for overload resolution begin here. */
3785 /* Compare two badness vectors A and B and return the result.
3786 0 => A and B are identical
3787 1 => A and B are incomparable
3788 2 => A is better than B
3789 3 => A is worse than B */
3792 compare_badness (const badness_vector
&a
, const badness_vector
&b
)
3796 short found_pos
= 0; /* any positives in c? */
3797 short found_neg
= 0; /* any negatives in c? */
3799 /* differing sizes => incomparable */
3800 if (a
.size () != b
.size ())
3803 /* Subtract b from a */
3804 for (i
= 0; i
< a
.size (); i
++)
3806 tmp
= compare_ranks (b
[i
], a
[i
]);
3816 return 1; /* incomparable */
3818 return 3; /* A > B */
3824 return 2; /* A < B */
3826 return 0; /* A == B */
3830 /* Rank a function by comparing its parameter types (PARMS), to the
3831 types of an argument list (ARGS). Return the badness vector. This
3832 has ARGS.size() + 1 entries. */
3835 rank_function (gdb::array_view
<type
*> parms
,
3836 gdb::array_view
<value
*> args
)
3838 /* add 1 for the length-match rank. */
3840 bv
.reserve (1 + args
.size ());
3842 /* First compare the lengths of the supplied lists.
3843 If there is a mismatch, set it to a high value. */
3845 /* pai/1997-06-03 FIXME: when we have debug info about default
3846 arguments and ellipsis parameter lists, we should consider those
3847 and rank the length-match more finely. */
3849 bv
.push_back ((args
.size () != parms
.size ())
3850 ? LENGTH_MISMATCH_BADNESS
3851 : EXACT_MATCH_BADNESS
);
3853 /* Now rank all the parameters of the candidate function. */
3854 size_t min_len
= std::min (parms
.size (), args
.size ());
3856 for (size_t i
= 0; i
< min_len
; i
++)
3857 bv
.push_back (rank_one_type (parms
[i
], value_type (args
[i
]),
3860 /* If more arguments than parameters, add dummy entries. */
3861 for (size_t i
= min_len
; i
< args
.size (); i
++)
3862 bv
.push_back (TOO_FEW_PARAMS_BADNESS
);
3867 /* Compare the names of two integer types, assuming that any sign
3868 qualifiers have been checked already. We do it this way because
3869 there may be an "int" in the name of one of the types. */
3872 integer_types_same_name_p (const char *first
, const char *second
)
3874 int first_p
, second_p
;
3876 /* If both are shorts, return 1; if neither is a short, keep
3878 first_p
= (strstr (first
, "short") != NULL
);
3879 second_p
= (strstr (second
, "short") != NULL
);
3880 if (first_p
&& second_p
)
3882 if (first_p
|| second_p
)
3885 /* Likewise for long. */
3886 first_p
= (strstr (first
, "long") != NULL
);
3887 second_p
= (strstr (second
, "long") != NULL
);
3888 if (first_p
&& second_p
)
3890 if (first_p
|| second_p
)
3893 /* Likewise for char. */
3894 first_p
= (strstr (first
, "char") != NULL
);
3895 second_p
= (strstr (second
, "char") != NULL
);
3896 if (first_p
&& second_p
)
3898 if (first_p
|| second_p
)
3901 /* They must both be ints. */
3905 /* Compares type A to type B. Returns true if they represent the same
3906 type, false otherwise. */
3909 types_equal (struct type
*a
, struct type
*b
)
3911 /* Identical type pointers. */
3912 /* However, this still doesn't catch all cases of same type for b
3913 and a. The reason is that builtin types are different from
3914 the same ones constructed from the object. */
3918 /* Resolve typedefs */
3919 if (a
->code () == TYPE_CODE_TYPEDEF
)
3920 a
= check_typedef (a
);
3921 if (b
->code () == TYPE_CODE_TYPEDEF
)
3922 b
= check_typedef (b
);
3924 /* If after resolving typedefs a and b are not of the same type
3925 code then they are not equal. */
3926 if (a
->code () != b
->code ())
3929 /* If a and b are both pointers types or both reference types then
3930 they are equal of the same type iff the objects they refer to are
3931 of the same type. */
3932 if (a
->code () == TYPE_CODE_PTR
3933 || a
->code () == TYPE_CODE_REF
)
3934 return types_equal (TYPE_TARGET_TYPE (a
),
3935 TYPE_TARGET_TYPE (b
));
3937 /* Well, damnit, if the names are exactly the same, I'll say they
3938 are exactly the same. This happens when we generate method
3939 stubs. The types won't point to the same address, but they
3940 really are the same. */
3942 if (a
->name () && b
->name ()
3943 && strcmp (a
->name (), b
->name ()) == 0)
3946 /* Check if identical after resolving typedefs. */
3950 /* Two function types are equal if their argument and return types
3952 if (a
->code () == TYPE_CODE_FUNC
)
3956 if (a
->num_fields () != b
->num_fields ())
3959 if (!types_equal (TYPE_TARGET_TYPE (a
), TYPE_TARGET_TYPE (b
)))
3962 for (i
= 0; i
< a
->num_fields (); ++i
)
3963 if (!types_equal (TYPE_FIELD_TYPE (a
, i
), TYPE_FIELD_TYPE (b
, i
)))
3972 /* Deep comparison of types. */
3974 /* An entry in the type-equality bcache. */
3976 struct type_equality_entry
3978 type_equality_entry (struct type
*t1
, struct type
*t2
)
3984 struct type
*type1
, *type2
;
3987 /* A helper function to compare two strings. Returns true if they are
3988 the same, false otherwise. Handles NULLs properly. */
3991 compare_maybe_null_strings (const char *s
, const char *t
)
3993 if (s
== NULL
|| t
== NULL
)
3995 return strcmp (s
, t
) == 0;
3998 /* A helper function for check_types_worklist that checks two types for
3999 "deep" equality. Returns true if the types are considered the
4000 same, false otherwise. */
4003 check_types_equal (struct type
*type1
, struct type
*type2
,
4004 std::vector
<type_equality_entry
> *worklist
)
4006 type1
= check_typedef (type1
);
4007 type2
= check_typedef (type2
);
4012 if (type1
->code () != type2
->code ()
4013 || TYPE_LENGTH (type1
) != TYPE_LENGTH (type2
)
4014 || TYPE_UNSIGNED (type1
) != TYPE_UNSIGNED (type2
)
4015 || TYPE_NOSIGN (type1
) != TYPE_NOSIGN (type2
)
4016 || TYPE_ENDIANITY_NOT_DEFAULT (type1
) != TYPE_ENDIANITY_NOT_DEFAULT (type2
)
4017 || TYPE_VARARGS (type1
) != TYPE_VARARGS (type2
)
4018 || TYPE_VECTOR (type1
) != TYPE_VECTOR (type2
)
4019 || TYPE_NOTTEXT (type1
) != TYPE_NOTTEXT (type2
)
4020 || TYPE_INSTANCE_FLAGS (type1
) != TYPE_INSTANCE_FLAGS (type2
)
4021 || type1
->num_fields () != type2
->num_fields ())
4024 if (!compare_maybe_null_strings (type1
->name (), type2
->name ()))
4026 if (!compare_maybe_null_strings (type1
->name (), type2
->name ()))
4029 if (type1
->code () == TYPE_CODE_RANGE
)
4031 if (*TYPE_RANGE_DATA (type1
) != *TYPE_RANGE_DATA (type2
))
4038 for (i
= 0; i
< type1
->num_fields (); ++i
)
4040 const struct field
*field1
= &type1
->field (i
);
4041 const struct field
*field2
= &type2
->field (i
);
4043 if (FIELD_ARTIFICIAL (*field1
) != FIELD_ARTIFICIAL (*field2
)
4044 || FIELD_BITSIZE (*field1
) != FIELD_BITSIZE (*field2
)
4045 || FIELD_LOC_KIND (*field1
) != FIELD_LOC_KIND (*field2
))
4047 if (!compare_maybe_null_strings (FIELD_NAME (*field1
),
4048 FIELD_NAME (*field2
)))
4050 switch (FIELD_LOC_KIND (*field1
))
4052 case FIELD_LOC_KIND_BITPOS
:
4053 if (FIELD_BITPOS (*field1
) != FIELD_BITPOS (*field2
))
4056 case FIELD_LOC_KIND_ENUMVAL
:
4057 if (FIELD_ENUMVAL (*field1
) != FIELD_ENUMVAL (*field2
))
4060 case FIELD_LOC_KIND_PHYSADDR
:
4061 if (FIELD_STATIC_PHYSADDR (*field1
)
4062 != FIELD_STATIC_PHYSADDR (*field2
))
4065 case FIELD_LOC_KIND_PHYSNAME
:
4066 if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1
),
4067 FIELD_STATIC_PHYSNAME (*field2
)))
4070 case FIELD_LOC_KIND_DWARF_BLOCK
:
4072 struct dwarf2_locexpr_baton
*block1
, *block2
;
4074 block1
= FIELD_DWARF_BLOCK (*field1
);
4075 block2
= FIELD_DWARF_BLOCK (*field2
);
4076 if (block1
->per_cu
!= block2
->per_cu
4077 || block1
->size
!= block2
->size
4078 || memcmp (block1
->data
, block2
->data
, block1
->size
) != 0)
4083 internal_error (__FILE__
, __LINE__
, _("Unsupported field kind "
4084 "%d by check_types_equal"),
4085 FIELD_LOC_KIND (*field1
));
4088 worklist
->emplace_back (FIELD_TYPE (*field1
), FIELD_TYPE (*field2
));
4092 if (TYPE_TARGET_TYPE (type1
) != NULL
)
4094 if (TYPE_TARGET_TYPE (type2
) == NULL
)
4097 worklist
->emplace_back (TYPE_TARGET_TYPE (type1
),
4098 TYPE_TARGET_TYPE (type2
));
4100 else if (TYPE_TARGET_TYPE (type2
) != NULL
)
4106 /* Check types on a worklist for equality. Returns false if any pair
4107 is not equal, true if they are all considered equal. */
4110 check_types_worklist (std::vector
<type_equality_entry
> *worklist
,
4113 while (!worklist
->empty ())
4117 struct type_equality_entry entry
= std::move (worklist
->back ());
4118 worklist
->pop_back ();
4120 /* If the type pair has already been visited, we know it is
4122 cache
->insert (&entry
, sizeof (entry
), &added
);
4126 if (!check_types_equal (entry
.type1
, entry
.type2
, worklist
))
4133 /* Return true if types TYPE1 and TYPE2 are equal, as determined by a
4134 "deep comparison". Otherwise return false. */
4137 types_deeply_equal (struct type
*type1
, struct type
*type2
)
4139 std::vector
<type_equality_entry
> worklist
;
4141 gdb_assert (type1
!= NULL
&& type2
!= NULL
);
4143 /* Early exit for the simple case. */
4147 gdb::bcache
cache (nullptr, nullptr);
4148 worklist
.emplace_back (type1
, type2
);
4149 return check_types_worklist (&worklist
, &cache
);
4152 /* Allocated status of type TYPE. Return zero if type TYPE is allocated.
4153 Otherwise return one. */
4156 type_not_allocated (const struct type
*type
)
4158 struct dynamic_prop
*prop
= TYPE_ALLOCATED_PROP (type
);
4160 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
4161 && !TYPE_DYN_PROP_ADDR (prop
));
4164 /* Associated status of type TYPE. Return zero if type TYPE is associated.
4165 Otherwise return one. */
4168 type_not_associated (const struct type
*type
)
4170 struct dynamic_prop
*prop
= TYPE_ASSOCIATED_PROP (type
);
4172 return (prop
&& TYPE_DYN_PROP_KIND (prop
) == PROP_CONST
4173 && !TYPE_DYN_PROP_ADDR (prop
));
4176 /* rank_one_type helper for when PARM's type code is TYPE_CODE_PTR. */
4179 rank_one_type_parm_ptr (struct type
*parm
, struct type
*arg
, struct value
*value
)
4181 struct rank rank
= {0,0};
4183 switch (arg
->code ())
4187 /* Allowed pointer conversions are:
4188 (a) pointer to void-pointer conversion. */
4189 if (TYPE_TARGET_TYPE (parm
)->code () == TYPE_CODE_VOID
)
4190 return VOID_PTR_CONVERSION_BADNESS
;
4192 /* (b) pointer to ancestor-pointer conversion. */
4193 rank
.subrank
= distance_to_ancestor (TYPE_TARGET_TYPE (parm
),
4194 TYPE_TARGET_TYPE (arg
),
4196 if (rank
.subrank
>= 0)
4197 return sum_ranks (BASE_PTR_CONVERSION_BADNESS
, rank
);
4199 return INCOMPATIBLE_TYPE_BADNESS
;
4200 case TYPE_CODE_ARRAY
:
4202 struct type
*t1
= TYPE_TARGET_TYPE (parm
);
4203 struct type
*t2
= TYPE_TARGET_TYPE (arg
);
4205 if (types_equal (t1
, t2
))
4207 /* Make sure they are CV equal. */
4208 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4209 rank
.subrank
|= CV_CONVERSION_CONST
;
4210 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4211 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4212 if (rank
.subrank
!= 0)
4213 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4214 return EXACT_MATCH_BADNESS
;
4216 return INCOMPATIBLE_TYPE_BADNESS
;
4218 case TYPE_CODE_FUNC
:
4219 return rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
);
4221 if (value
!= NULL
&& value_type (value
)->code () == TYPE_CODE_INT
)
4223 if (value_as_long (value
) == 0)
4225 /* Null pointer conversion: allow it to be cast to a pointer.
4226 [4.10.1 of C++ standard draft n3290] */
4227 return NULL_POINTER_CONVERSION_BADNESS
;
4231 /* If type checking is disabled, allow the conversion. */
4232 if (!strict_type_checking
)
4233 return NS_INTEGER_POINTER_CONVERSION_BADNESS
;
4237 case TYPE_CODE_ENUM
:
4238 case TYPE_CODE_FLAGS
:
4239 case TYPE_CODE_CHAR
:
4240 case TYPE_CODE_RANGE
:
4241 case TYPE_CODE_BOOL
:
4243 return INCOMPATIBLE_TYPE_BADNESS
;
4247 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ARRAY. */
4250 rank_one_type_parm_array (struct type
*parm
, struct type
*arg
, struct value
*value
)
4252 switch (arg
->code ())
4255 case TYPE_CODE_ARRAY
:
4256 return rank_one_type (TYPE_TARGET_TYPE (parm
),
4257 TYPE_TARGET_TYPE (arg
), NULL
);
4259 return INCOMPATIBLE_TYPE_BADNESS
;
4263 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FUNC. */
4266 rank_one_type_parm_func (struct type
*parm
, struct type
*arg
, struct value
*value
)
4268 switch (arg
->code ())
4270 case TYPE_CODE_PTR
: /* funcptr -> func */
4271 return rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
);
4273 return INCOMPATIBLE_TYPE_BADNESS
;
4277 /* rank_one_type helper for when PARM's type code is TYPE_CODE_INT. */
4280 rank_one_type_parm_int (struct type
*parm
, struct type
*arg
, struct value
*value
)
4282 switch (arg
->code ())
4285 if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4287 /* Deal with signed, unsigned, and plain chars and
4288 signed and unsigned ints. */
4289 if (TYPE_NOSIGN (parm
))
4291 /* This case only for character types. */
4292 if (TYPE_NOSIGN (arg
))
4293 return EXACT_MATCH_BADNESS
; /* plain char -> plain char */
4294 else /* signed/unsigned char -> plain char */
4295 return INTEGER_CONVERSION_BADNESS
;
4297 else if (TYPE_UNSIGNED (parm
))
4299 if (TYPE_UNSIGNED (arg
))
4301 /* unsigned int -> unsigned int, or
4302 unsigned long -> unsigned long */
4303 if (integer_types_same_name_p (parm
->name (),
4305 return EXACT_MATCH_BADNESS
;
4306 else if (integer_types_same_name_p (arg
->name (),
4308 && integer_types_same_name_p (parm
->name (),
4310 /* unsigned int -> unsigned long */
4311 return INTEGER_PROMOTION_BADNESS
;
4313 /* unsigned long -> unsigned int */
4314 return INTEGER_CONVERSION_BADNESS
;
4318 if (integer_types_same_name_p (arg
->name (),
4320 && integer_types_same_name_p (parm
->name (),
4322 /* signed long -> unsigned int */
4323 return INTEGER_CONVERSION_BADNESS
;
4325 /* signed int/long -> unsigned int/long */
4326 return INTEGER_CONVERSION_BADNESS
;
4329 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
4331 if (integer_types_same_name_p (parm
->name (),
4333 return EXACT_MATCH_BADNESS
;
4334 else if (integer_types_same_name_p (arg
->name (),
4336 && integer_types_same_name_p (parm
->name (),
4338 return INTEGER_PROMOTION_BADNESS
;
4340 return INTEGER_CONVERSION_BADNESS
;
4343 return INTEGER_CONVERSION_BADNESS
;
4345 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4346 return INTEGER_PROMOTION_BADNESS
;
4348 return INTEGER_CONVERSION_BADNESS
;
4349 case TYPE_CODE_ENUM
:
4350 case TYPE_CODE_FLAGS
:
4351 case TYPE_CODE_CHAR
:
4352 case TYPE_CODE_RANGE
:
4353 case TYPE_CODE_BOOL
:
4354 if (TYPE_DECLARED_CLASS (arg
))
4355 return INCOMPATIBLE_TYPE_BADNESS
;
4356 return INTEGER_PROMOTION_BADNESS
;
4358 return INT_FLOAT_CONVERSION_BADNESS
;
4360 return NS_POINTER_CONVERSION_BADNESS
;
4362 return INCOMPATIBLE_TYPE_BADNESS
;
4366 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ENUM. */
4369 rank_one_type_parm_enum (struct type
*parm
, struct type
*arg
, struct value
*value
)
4371 switch (arg
->code ())
4374 case TYPE_CODE_CHAR
:
4375 case TYPE_CODE_RANGE
:
4376 case TYPE_CODE_BOOL
:
4377 case TYPE_CODE_ENUM
:
4378 if (TYPE_DECLARED_CLASS (parm
) || TYPE_DECLARED_CLASS (arg
))
4379 return INCOMPATIBLE_TYPE_BADNESS
;
4380 return INTEGER_CONVERSION_BADNESS
;
4382 return INT_FLOAT_CONVERSION_BADNESS
;
4384 return INCOMPATIBLE_TYPE_BADNESS
;
4388 /* rank_one_type helper for when PARM's type code is TYPE_CODE_CHAR. */
4391 rank_one_type_parm_char (struct type
*parm
, struct type
*arg
, struct value
*value
)
4393 switch (arg
->code ())
4395 case TYPE_CODE_RANGE
:
4396 case TYPE_CODE_BOOL
:
4397 case TYPE_CODE_ENUM
:
4398 if (TYPE_DECLARED_CLASS (arg
))
4399 return INCOMPATIBLE_TYPE_BADNESS
;
4400 return INTEGER_CONVERSION_BADNESS
;
4402 return INT_FLOAT_CONVERSION_BADNESS
;
4404 if (TYPE_LENGTH (arg
) > TYPE_LENGTH (parm
))
4405 return INTEGER_CONVERSION_BADNESS
;
4406 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4407 return INTEGER_PROMOTION_BADNESS
;
4409 case TYPE_CODE_CHAR
:
4410 /* Deal with signed, unsigned, and plain chars for C++ and
4411 with int cases falling through from previous case. */
4412 if (TYPE_NOSIGN (parm
))
4414 if (TYPE_NOSIGN (arg
))
4415 return EXACT_MATCH_BADNESS
;
4417 return INTEGER_CONVERSION_BADNESS
;
4419 else if (TYPE_UNSIGNED (parm
))
4421 if (TYPE_UNSIGNED (arg
))
4422 return EXACT_MATCH_BADNESS
;
4424 return INTEGER_PROMOTION_BADNESS
;
4426 else if (!TYPE_NOSIGN (arg
) && !TYPE_UNSIGNED (arg
))
4427 return EXACT_MATCH_BADNESS
;
4429 return INTEGER_CONVERSION_BADNESS
;
4431 return INCOMPATIBLE_TYPE_BADNESS
;
4435 /* rank_one_type helper for when PARM's type code is TYPE_CODE_RANGE. */
4438 rank_one_type_parm_range (struct type
*parm
, struct type
*arg
, struct value
*value
)
4440 switch (arg
->code ())
4443 case TYPE_CODE_CHAR
:
4444 case TYPE_CODE_RANGE
:
4445 case TYPE_CODE_BOOL
:
4446 case TYPE_CODE_ENUM
:
4447 return INTEGER_CONVERSION_BADNESS
;
4449 return INT_FLOAT_CONVERSION_BADNESS
;
4451 return INCOMPATIBLE_TYPE_BADNESS
;
4455 /* rank_one_type helper for when PARM's type code is TYPE_CODE_BOOL. */
4458 rank_one_type_parm_bool (struct type
*parm
, struct type
*arg
, struct value
*value
)
4460 switch (arg
->code ())
4462 /* n3290 draft, section 4.12.1 (conv.bool):
4464 "A prvalue of arithmetic, unscoped enumeration, pointer, or
4465 pointer to member type can be converted to a prvalue of type
4466 bool. A zero value, null pointer value, or null member pointer
4467 value is converted to false; any other value is converted to
4468 true. A prvalue of type std::nullptr_t can be converted to a
4469 prvalue of type bool; the resulting value is false." */
4471 case TYPE_CODE_CHAR
:
4472 case TYPE_CODE_ENUM
:
4474 case TYPE_CODE_MEMBERPTR
:
4476 return BOOL_CONVERSION_BADNESS
;
4477 case TYPE_CODE_RANGE
:
4478 return INCOMPATIBLE_TYPE_BADNESS
;
4479 case TYPE_CODE_BOOL
:
4480 return EXACT_MATCH_BADNESS
;
4482 return INCOMPATIBLE_TYPE_BADNESS
;
4486 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FLOAT. */
4489 rank_one_type_parm_float (struct type
*parm
, struct type
*arg
, struct value
*value
)
4491 switch (arg
->code ())
4494 if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4495 return FLOAT_PROMOTION_BADNESS
;
4496 else if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4497 return EXACT_MATCH_BADNESS
;
4499 return FLOAT_CONVERSION_BADNESS
;
4501 case TYPE_CODE_BOOL
:
4502 case TYPE_CODE_ENUM
:
4503 case TYPE_CODE_RANGE
:
4504 case TYPE_CODE_CHAR
:
4505 return INT_FLOAT_CONVERSION_BADNESS
;
4507 return INCOMPATIBLE_TYPE_BADNESS
;
4511 /* rank_one_type helper for when PARM's type code is TYPE_CODE_COMPLEX. */
4514 rank_one_type_parm_complex (struct type
*parm
, struct type
*arg
, struct value
*value
)
4516 switch (arg
->code ())
4517 { /* Strictly not needed for C++, but... */
4519 return FLOAT_PROMOTION_BADNESS
;
4520 case TYPE_CODE_COMPLEX
:
4521 return EXACT_MATCH_BADNESS
;
4523 return INCOMPATIBLE_TYPE_BADNESS
;
4527 /* rank_one_type helper for when PARM's type code is TYPE_CODE_STRUCT. */
4530 rank_one_type_parm_struct (struct type
*parm
, struct type
*arg
, struct value
*value
)
4532 struct rank rank
= {0, 0};
4534 switch (arg
->code ())
4536 case TYPE_CODE_STRUCT
:
4537 /* Check for derivation */
4538 rank
.subrank
= distance_to_ancestor (parm
, arg
, 0);
4539 if (rank
.subrank
>= 0)
4540 return sum_ranks (BASE_CONVERSION_BADNESS
, rank
);
4543 return INCOMPATIBLE_TYPE_BADNESS
;
4547 /* rank_one_type helper for when PARM's type code is TYPE_CODE_SET. */
4550 rank_one_type_parm_set (struct type
*parm
, struct type
*arg
, struct value
*value
)
4552 switch (arg
->code ())
4556 return rank_one_type (TYPE_FIELD_TYPE (parm
, 0),
4557 TYPE_FIELD_TYPE (arg
, 0), NULL
);
4559 return INCOMPATIBLE_TYPE_BADNESS
;
4563 /* Compare one type (PARM) for compatibility with another (ARG).
4564 * PARM is intended to be the parameter type of a function; and
4565 * ARG is the supplied argument's type. This function tests if
4566 * the latter can be converted to the former.
4567 * VALUE is the argument's value or NULL if none (or called recursively)
4569 * Return 0 if they are identical types;
4570 * Otherwise, return an integer which corresponds to how compatible
4571 * PARM is to ARG. The higher the return value, the worse the match.
4572 * Generally the "bad" conversions are all uniformly assigned a 100. */
4575 rank_one_type (struct type
*parm
, struct type
*arg
, struct value
*value
)
4577 struct rank rank
= {0,0};
4579 /* Resolve typedefs */
4580 if (parm
->code () == TYPE_CODE_TYPEDEF
)
4581 parm
= check_typedef (parm
);
4582 if (arg
->code () == TYPE_CODE_TYPEDEF
)
4583 arg
= check_typedef (arg
);
4585 if (TYPE_IS_REFERENCE (parm
) && value
!= NULL
)
4587 if (VALUE_LVAL (value
) == not_lval
)
4589 /* Rvalues should preferably bind to rvalue references or const
4590 lvalue references. */
4591 if (parm
->code () == TYPE_CODE_RVALUE_REF
)
4592 rank
.subrank
= REFERENCE_CONVERSION_RVALUE
;
4593 else if (TYPE_CONST (TYPE_TARGET_TYPE (parm
)))
4594 rank
.subrank
= REFERENCE_CONVERSION_CONST_LVALUE
;
4596 return INCOMPATIBLE_TYPE_BADNESS
;
4597 return sum_ranks (rank
, REFERENCE_CONVERSION_BADNESS
);
4601 /* It's illegal to pass an lvalue as an rvalue. */
4602 if (parm
->code () == TYPE_CODE_RVALUE_REF
)
4603 return INCOMPATIBLE_TYPE_BADNESS
;
4607 if (types_equal (parm
, arg
))
4609 struct type
*t1
= parm
;
4610 struct type
*t2
= arg
;
4612 /* For pointers and references, compare target type. */
4613 if (parm
->code () == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (parm
))
4615 t1
= TYPE_TARGET_TYPE (parm
);
4616 t2
= TYPE_TARGET_TYPE (arg
);
4619 /* Make sure they are CV equal, too. */
4620 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4621 rank
.subrank
|= CV_CONVERSION_CONST
;
4622 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4623 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4624 if (rank
.subrank
!= 0)
4625 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4626 return EXACT_MATCH_BADNESS
;
4629 /* See through references, since we can almost make non-references
4632 if (TYPE_IS_REFERENCE (arg
))
4633 return (sum_ranks (rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
),
4634 REFERENCE_SEE_THROUGH_BADNESS
));
4635 if (TYPE_IS_REFERENCE (parm
))
4636 return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
),
4637 REFERENCE_SEE_THROUGH_BADNESS
));
4639 /* Debugging only. */
4640 fprintf_filtered (gdb_stderr
,
4641 "------ Arg is %s [%d], parm is %s [%d]\n",
4642 arg
->name (), arg
->code (),
4643 parm
->name (), parm
->code ());
4645 /* x -> y means arg of type x being supplied for parameter of type y. */
4647 switch (parm
->code ())
4650 return rank_one_type_parm_ptr (parm
, arg
, value
);
4651 case TYPE_CODE_ARRAY
:
4652 return rank_one_type_parm_array (parm
, arg
, value
);
4653 case TYPE_CODE_FUNC
:
4654 return rank_one_type_parm_func (parm
, arg
, value
);
4656 return rank_one_type_parm_int (parm
, arg
, value
);
4657 case TYPE_CODE_ENUM
:
4658 return rank_one_type_parm_enum (parm
, arg
, value
);
4659 case TYPE_CODE_CHAR
:
4660 return rank_one_type_parm_char (parm
, arg
, value
);
4661 case TYPE_CODE_RANGE
:
4662 return rank_one_type_parm_range (parm
, arg
, value
);
4663 case TYPE_CODE_BOOL
:
4664 return rank_one_type_parm_bool (parm
, arg
, value
);
4666 return rank_one_type_parm_float (parm
, arg
, value
);
4667 case TYPE_CODE_COMPLEX
:
4668 return rank_one_type_parm_complex (parm
, arg
, value
);
4669 case TYPE_CODE_STRUCT
:
4670 return rank_one_type_parm_struct (parm
, arg
, value
);
4672 return rank_one_type_parm_set (parm
, arg
, value
);
4674 return INCOMPATIBLE_TYPE_BADNESS
;
4675 } /* switch (arg->code ()) */
4678 /* End of functions for overload resolution. */
4680 /* Routines to pretty-print types. */
4683 print_bit_vector (B_TYPE
*bits
, int nbits
)
4687 for (bitno
= 0; bitno
< nbits
; bitno
++)
4689 if ((bitno
% 8) == 0)
4691 puts_filtered (" ");
4693 if (B_TST (bits
, bitno
))
4694 printf_filtered (("1"));
4696 printf_filtered (("0"));
4700 /* Note the first arg should be the "this" pointer, we may not want to
4701 include it since we may get into a infinitely recursive
4705 print_args (struct field
*args
, int nargs
, int spaces
)
4711 for (i
= 0; i
< nargs
; i
++)
4713 printfi_filtered (spaces
, "[%d] name '%s'\n", i
,
4714 args
[i
].name
!= NULL
? args
[i
].name
: "<NULL>");
4715 recursive_dump_type (args
[i
].type (), spaces
+ 2);
4721 field_is_static (struct field
*f
)
4723 /* "static" fields are the fields whose location is not relative
4724 to the address of the enclosing struct. It would be nice to
4725 have a dedicated flag that would be set for static fields when
4726 the type is being created. But in practice, checking the field
4727 loc_kind should give us an accurate answer. */
4728 return (FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSNAME
4729 || FIELD_LOC_KIND (*f
) == FIELD_LOC_KIND_PHYSADDR
);
4733 dump_fn_fieldlists (struct type
*type
, int spaces
)
4739 printfi_filtered (spaces
, "fn_fieldlists ");
4740 gdb_print_host_address (TYPE_FN_FIELDLISTS (type
), gdb_stdout
);
4741 printf_filtered ("\n");
4742 for (method_idx
= 0; method_idx
< TYPE_NFN_FIELDS (type
); method_idx
++)
4744 f
= TYPE_FN_FIELDLIST1 (type
, method_idx
);
4745 printfi_filtered (spaces
+ 2, "[%d] name '%s' (",
4747 TYPE_FN_FIELDLIST_NAME (type
, method_idx
));
4748 gdb_print_host_address (TYPE_FN_FIELDLIST_NAME (type
, method_idx
),
4750 printf_filtered (_(") length %d\n"),
4751 TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
));
4752 for (overload_idx
= 0;
4753 overload_idx
< TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
);
4756 printfi_filtered (spaces
+ 4, "[%d] physname '%s' (",
4758 TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
));
4759 gdb_print_host_address (TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
),
4761 printf_filtered (")\n");
4762 printfi_filtered (spaces
+ 8, "type ");
4763 gdb_print_host_address (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4765 printf_filtered ("\n");
4767 recursive_dump_type (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4770 printfi_filtered (spaces
+ 8, "args ");
4771 gdb_print_host_address (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4773 printf_filtered ("\n");
4774 print_args (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4775 TYPE_FN_FIELD_TYPE (f
, overload_idx
)->num_fields (),
4777 printfi_filtered (spaces
+ 8, "fcontext ");
4778 gdb_print_host_address (TYPE_FN_FIELD_FCONTEXT (f
, overload_idx
),
4780 printf_filtered ("\n");
4782 printfi_filtered (spaces
+ 8, "is_const %d\n",
4783 TYPE_FN_FIELD_CONST (f
, overload_idx
));
4784 printfi_filtered (spaces
+ 8, "is_volatile %d\n",
4785 TYPE_FN_FIELD_VOLATILE (f
, overload_idx
));
4786 printfi_filtered (spaces
+ 8, "is_private %d\n",
4787 TYPE_FN_FIELD_PRIVATE (f
, overload_idx
));
4788 printfi_filtered (spaces
+ 8, "is_protected %d\n",
4789 TYPE_FN_FIELD_PROTECTED (f
, overload_idx
));
4790 printfi_filtered (spaces
+ 8, "is_stub %d\n",
4791 TYPE_FN_FIELD_STUB (f
, overload_idx
));
4792 printfi_filtered (spaces
+ 8, "defaulted %d\n",
4793 TYPE_FN_FIELD_DEFAULTED (f
, overload_idx
));
4794 printfi_filtered (spaces
+ 8, "is_deleted %d\n",
4795 TYPE_FN_FIELD_DELETED (f
, overload_idx
));
4796 printfi_filtered (spaces
+ 8, "voffset %u\n",
4797 TYPE_FN_FIELD_VOFFSET (f
, overload_idx
));
4803 print_cplus_stuff (struct type
*type
, int spaces
)
4805 printfi_filtered (spaces
, "vptr_fieldno %d\n", TYPE_VPTR_FIELDNO (type
));
4806 printfi_filtered (spaces
, "vptr_basetype ");
4807 gdb_print_host_address (TYPE_VPTR_BASETYPE (type
), gdb_stdout
);
4808 puts_filtered ("\n");
4809 if (TYPE_VPTR_BASETYPE (type
) != NULL
)
4810 recursive_dump_type (TYPE_VPTR_BASETYPE (type
), spaces
+ 2);
4812 printfi_filtered (spaces
, "n_baseclasses %d\n",
4813 TYPE_N_BASECLASSES (type
));
4814 printfi_filtered (spaces
, "nfn_fields %d\n",
4815 TYPE_NFN_FIELDS (type
));
4816 if (TYPE_N_BASECLASSES (type
) > 0)
4818 printfi_filtered (spaces
, "virtual_field_bits (%d bits at *",
4819 TYPE_N_BASECLASSES (type
));
4820 gdb_print_host_address (TYPE_FIELD_VIRTUAL_BITS (type
),
4822 printf_filtered (")");
4824 print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type
),
4825 TYPE_N_BASECLASSES (type
));
4826 puts_filtered ("\n");
4828 if (type
->num_fields () > 0)
4830 if (TYPE_FIELD_PRIVATE_BITS (type
) != NULL
)
4832 printfi_filtered (spaces
,
4833 "private_field_bits (%d bits at *",
4834 type
->num_fields ());
4835 gdb_print_host_address (TYPE_FIELD_PRIVATE_BITS (type
),
4837 printf_filtered (")");
4838 print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type
),
4839 type
->num_fields ());
4840 puts_filtered ("\n");
4842 if (TYPE_FIELD_PROTECTED_BITS (type
) != NULL
)
4844 printfi_filtered (spaces
,
4845 "protected_field_bits (%d bits at *",
4846 type
->num_fields ());
4847 gdb_print_host_address (TYPE_FIELD_PROTECTED_BITS (type
),
4849 printf_filtered (")");
4850 print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type
),
4851 type
->num_fields ());
4852 puts_filtered ("\n");
4855 if (TYPE_NFN_FIELDS (type
) > 0)
4857 dump_fn_fieldlists (type
, spaces
);
4860 printfi_filtered (spaces
, "calling_convention %d\n",
4861 TYPE_CPLUS_CALLING_CONVENTION (type
));
4864 /* Print the contents of the TYPE's type_specific union, assuming that
4865 its type-specific kind is TYPE_SPECIFIC_GNAT_STUFF. */
4868 print_gnat_stuff (struct type
*type
, int spaces
)
4870 struct type
*descriptive_type
= TYPE_DESCRIPTIVE_TYPE (type
);
4872 if (descriptive_type
== NULL
)
4873 printfi_filtered (spaces
+ 2, "no descriptive type\n");
4876 printfi_filtered (spaces
+ 2, "descriptive type\n");
4877 recursive_dump_type (descriptive_type
, spaces
+ 4);
4881 static struct obstack dont_print_type_obstack
;
4884 recursive_dump_type (struct type
*type
, int spaces
)
4889 obstack_begin (&dont_print_type_obstack
, 0);
4891 if (type
->num_fields () > 0
4892 || (HAVE_CPLUS_STRUCT (type
) && TYPE_NFN_FIELDS (type
) > 0))
4894 struct type
**first_dont_print
4895 = (struct type
**) obstack_base (&dont_print_type_obstack
);
4897 int i
= (struct type
**)
4898 obstack_next_free (&dont_print_type_obstack
) - first_dont_print
;
4902 if (type
== first_dont_print
[i
])
4904 printfi_filtered (spaces
, "type node ");
4905 gdb_print_host_address (type
, gdb_stdout
);
4906 printf_filtered (_(" <same as already seen type>\n"));
4911 obstack_ptr_grow (&dont_print_type_obstack
, type
);
4914 printfi_filtered (spaces
, "type node ");
4915 gdb_print_host_address (type
, gdb_stdout
);
4916 printf_filtered ("\n");
4917 printfi_filtered (spaces
, "name '%s' (",
4918 type
->name () ? type
->name () : "<NULL>");
4919 gdb_print_host_address (type
->name (), gdb_stdout
);
4920 printf_filtered (")\n");
4921 printfi_filtered (spaces
, "code 0x%x ", type
->code ());
4922 switch (type
->code ())
4924 case TYPE_CODE_UNDEF
:
4925 printf_filtered ("(TYPE_CODE_UNDEF)");
4928 printf_filtered ("(TYPE_CODE_PTR)");
4930 case TYPE_CODE_ARRAY
:
4931 printf_filtered ("(TYPE_CODE_ARRAY)");
4933 case TYPE_CODE_STRUCT
:
4934 printf_filtered ("(TYPE_CODE_STRUCT)");
4936 case TYPE_CODE_UNION
:
4937 printf_filtered ("(TYPE_CODE_UNION)");
4939 case TYPE_CODE_ENUM
:
4940 printf_filtered ("(TYPE_CODE_ENUM)");
4942 case TYPE_CODE_FLAGS
:
4943 printf_filtered ("(TYPE_CODE_FLAGS)");
4945 case TYPE_CODE_FUNC
:
4946 printf_filtered ("(TYPE_CODE_FUNC)");
4949 printf_filtered ("(TYPE_CODE_INT)");
4952 printf_filtered ("(TYPE_CODE_FLT)");
4954 case TYPE_CODE_VOID
:
4955 printf_filtered ("(TYPE_CODE_VOID)");
4958 printf_filtered ("(TYPE_CODE_SET)");
4960 case TYPE_CODE_RANGE
:
4961 printf_filtered ("(TYPE_CODE_RANGE)");
4963 case TYPE_CODE_STRING
:
4964 printf_filtered ("(TYPE_CODE_STRING)");
4966 case TYPE_CODE_ERROR
:
4967 printf_filtered ("(TYPE_CODE_ERROR)");
4969 case TYPE_CODE_MEMBERPTR
:
4970 printf_filtered ("(TYPE_CODE_MEMBERPTR)");
4972 case TYPE_CODE_METHODPTR
:
4973 printf_filtered ("(TYPE_CODE_METHODPTR)");
4975 case TYPE_CODE_METHOD
:
4976 printf_filtered ("(TYPE_CODE_METHOD)");
4979 printf_filtered ("(TYPE_CODE_REF)");
4981 case TYPE_CODE_CHAR
:
4982 printf_filtered ("(TYPE_CODE_CHAR)");
4984 case TYPE_CODE_BOOL
:
4985 printf_filtered ("(TYPE_CODE_BOOL)");
4987 case TYPE_CODE_COMPLEX
:
4988 printf_filtered ("(TYPE_CODE_COMPLEX)");
4990 case TYPE_CODE_TYPEDEF
:
4991 printf_filtered ("(TYPE_CODE_TYPEDEF)");
4993 case TYPE_CODE_NAMESPACE
:
4994 printf_filtered ("(TYPE_CODE_NAMESPACE)");
4997 printf_filtered ("(UNKNOWN TYPE CODE)");
5000 puts_filtered ("\n");
5001 printfi_filtered (spaces
, "length %s\n", pulongest (TYPE_LENGTH (type
)));
5002 if (TYPE_OBJFILE_OWNED (type
))
5004 printfi_filtered (spaces
, "objfile ");
5005 gdb_print_host_address (TYPE_OWNER (type
).objfile
, gdb_stdout
);
5009 printfi_filtered (spaces
, "gdbarch ");
5010 gdb_print_host_address (TYPE_OWNER (type
).gdbarch
, gdb_stdout
);
5012 printf_filtered ("\n");
5013 printfi_filtered (spaces
, "target_type ");
5014 gdb_print_host_address (TYPE_TARGET_TYPE (type
), gdb_stdout
);
5015 printf_filtered ("\n");
5016 if (TYPE_TARGET_TYPE (type
) != NULL
)
5018 recursive_dump_type (TYPE_TARGET_TYPE (type
), spaces
+ 2);
5020 printfi_filtered (spaces
, "pointer_type ");
5021 gdb_print_host_address (TYPE_POINTER_TYPE (type
), gdb_stdout
);
5022 printf_filtered ("\n");
5023 printfi_filtered (spaces
, "reference_type ");
5024 gdb_print_host_address (TYPE_REFERENCE_TYPE (type
), gdb_stdout
);
5025 printf_filtered ("\n");
5026 printfi_filtered (spaces
, "type_chain ");
5027 gdb_print_host_address (TYPE_CHAIN (type
), gdb_stdout
);
5028 printf_filtered ("\n");
5029 printfi_filtered (spaces
, "instance_flags 0x%x",
5030 TYPE_INSTANCE_FLAGS (type
));
5031 if (TYPE_CONST (type
))
5033 puts_filtered (" TYPE_CONST");
5035 if (TYPE_VOLATILE (type
))
5037 puts_filtered (" TYPE_VOLATILE");
5039 if (TYPE_CODE_SPACE (type
))
5041 puts_filtered (" TYPE_CODE_SPACE");
5043 if (TYPE_DATA_SPACE (type
))
5045 puts_filtered (" TYPE_DATA_SPACE");
5047 if (TYPE_ADDRESS_CLASS_1 (type
))
5049 puts_filtered (" TYPE_ADDRESS_CLASS_1");
5051 if (TYPE_ADDRESS_CLASS_2 (type
))
5053 puts_filtered (" TYPE_ADDRESS_CLASS_2");
5055 if (TYPE_RESTRICT (type
))
5057 puts_filtered (" TYPE_RESTRICT");
5059 if (TYPE_ATOMIC (type
))
5061 puts_filtered (" TYPE_ATOMIC");
5063 puts_filtered ("\n");
5065 printfi_filtered (spaces
, "flags");
5066 if (TYPE_UNSIGNED (type
))
5068 puts_filtered (" TYPE_UNSIGNED");
5070 if (TYPE_NOSIGN (type
))
5072 puts_filtered (" TYPE_NOSIGN");
5074 if (TYPE_ENDIANITY_NOT_DEFAULT (type
))
5076 puts_filtered (" TYPE_ENDIANITY_NOT_DEFAULT");
5078 if (TYPE_STUB (type
))
5080 puts_filtered (" TYPE_STUB");
5082 if (TYPE_TARGET_STUB (type
))
5084 puts_filtered (" TYPE_TARGET_STUB");
5086 if (TYPE_PROTOTYPED (type
))
5088 puts_filtered (" TYPE_PROTOTYPED");
5090 if (TYPE_VARARGS (type
))
5092 puts_filtered (" TYPE_VARARGS");
5094 /* This is used for things like AltiVec registers on ppc. Gcc emits
5095 an attribute for the array type, which tells whether or not we
5096 have a vector, instead of a regular array. */
5097 if (TYPE_VECTOR (type
))
5099 puts_filtered (" TYPE_VECTOR");
5101 if (TYPE_FIXED_INSTANCE (type
))
5103 puts_filtered (" TYPE_FIXED_INSTANCE");
5105 if (TYPE_STUB_SUPPORTED (type
))
5107 puts_filtered (" TYPE_STUB_SUPPORTED");
5109 if (TYPE_NOTTEXT (type
))
5111 puts_filtered (" TYPE_NOTTEXT");
5113 puts_filtered ("\n");
5114 printfi_filtered (spaces
, "nfields %d ", type
->num_fields ());
5115 gdb_print_host_address (type
->fields (), gdb_stdout
);
5116 puts_filtered ("\n");
5117 for (idx
= 0; idx
< type
->num_fields (); idx
++)
5119 if (type
->code () == TYPE_CODE_ENUM
)
5120 printfi_filtered (spaces
+ 2,
5121 "[%d] enumval %s type ",
5122 idx
, plongest (TYPE_FIELD_ENUMVAL (type
, idx
)));
5124 printfi_filtered (spaces
+ 2,
5125 "[%d] bitpos %s bitsize %d type ",
5126 idx
, plongest (TYPE_FIELD_BITPOS (type
, idx
)),
5127 TYPE_FIELD_BITSIZE (type
, idx
));
5128 gdb_print_host_address (TYPE_FIELD_TYPE (type
, idx
), gdb_stdout
);
5129 printf_filtered (" name '%s' (",
5130 TYPE_FIELD_NAME (type
, idx
) != NULL
5131 ? TYPE_FIELD_NAME (type
, idx
)
5133 gdb_print_host_address (TYPE_FIELD_NAME (type
, idx
), gdb_stdout
);
5134 printf_filtered (")\n");
5135 if (TYPE_FIELD_TYPE (type
, idx
) != NULL
)
5137 recursive_dump_type (TYPE_FIELD_TYPE (type
, idx
), spaces
+ 4);
5140 if (type
->code () == TYPE_CODE_RANGE
)
5142 printfi_filtered (spaces
, "low %s%s high %s%s\n",
5143 plongest (TYPE_LOW_BOUND (type
)),
5144 TYPE_LOW_BOUND_UNDEFINED (type
) ? " (undefined)" : "",
5145 plongest (TYPE_HIGH_BOUND (type
)),
5146 TYPE_HIGH_BOUND_UNDEFINED (type
)
5147 ? " (undefined)" : "");
5150 switch (TYPE_SPECIFIC_FIELD (type
))
5152 case TYPE_SPECIFIC_CPLUS_STUFF
:
5153 printfi_filtered (spaces
, "cplus_stuff ");
5154 gdb_print_host_address (TYPE_CPLUS_SPECIFIC (type
),
5156 puts_filtered ("\n");
5157 print_cplus_stuff (type
, spaces
);
5160 case TYPE_SPECIFIC_GNAT_STUFF
:
5161 printfi_filtered (spaces
, "gnat_stuff ");
5162 gdb_print_host_address (TYPE_GNAT_SPECIFIC (type
), gdb_stdout
);
5163 puts_filtered ("\n");
5164 print_gnat_stuff (type
, spaces
);
5167 case TYPE_SPECIFIC_FLOATFORMAT
:
5168 printfi_filtered (spaces
, "floatformat ");
5169 if (TYPE_FLOATFORMAT (type
) == NULL
5170 || TYPE_FLOATFORMAT (type
)->name
== NULL
)
5171 puts_filtered ("(null)");
5173 puts_filtered (TYPE_FLOATFORMAT (type
)->name
);
5174 puts_filtered ("\n");
5177 case TYPE_SPECIFIC_FUNC
:
5178 printfi_filtered (spaces
, "calling_convention %d\n",
5179 TYPE_CALLING_CONVENTION (type
));
5180 /* tail_call_list is not printed. */
5183 case TYPE_SPECIFIC_SELF_TYPE
:
5184 printfi_filtered (spaces
, "self_type ");
5185 gdb_print_host_address (TYPE_SELF_TYPE (type
), gdb_stdout
);
5186 puts_filtered ("\n");
5191 obstack_free (&dont_print_type_obstack
, NULL
);
5194 /* Trivial helpers for the libiberty hash table, for mapping one
5197 struct type_pair
: public allocate_on_obstack
5199 type_pair (struct type
*old_
, struct type
*newobj_
)
5200 : old (old_
), newobj (newobj_
)
5203 struct type
* const old
, * const newobj
;
5207 type_pair_hash (const void *item
)
5209 const struct type_pair
*pair
= (const struct type_pair
*) item
;
5211 return htab_hash_pointer (pair
->old
);
5215 type_pair_eq (const void *item_lhs
, const void *item_rhs
)
5217 const struct type_pair
*lhs
= (const struct type_pair
*) item_lhs
;
5218 const struct type_pair
*rhs
= (const struct type_pair
*) item_rhs
;
5220 return lhs
->old
== rhs
->old
;
5223 /* Allocate the hash table used by copy_type_recursive to walk
5224 types without duplicates. We use OBJFILE's obstack, because
5225 OBJFILE is about to be deleted. */
5228 create_copied_types_hash (struct objfile
*objfile
)
5230 return htab_create_alloc_ex (1, type_pair_hash
, type_pair_eq
,
5231 NULL
, &objfile
->objfile_obstack
,
5232 hashtab_obstack_allocate
,
5233 dummy_obstack_deallocate
);
5236 /* Recursively copy (deep copy) a dynamic attribute list of a type. */
5238 static struct dynamic_prop_list
*
5239 copy_dynamic_prop_list (struct obstack
*objfile_obstack
,
5240 struct dynamic_prop_list
*list
)
5242 struct dynamic_prop_list
*copy
= list
;
5243 struct dynamic_prop_list
**node_ptr
= ©
;
5245 while (*node_ptr
!= NULL
)
5247 struct dynamic_prop_list
*node_copy
;
5249 node_copy
= ((struct dynamic_prop_list
*)
5250 obstack_copy (objfile_obstack
, *node_ptr
,
5251 sizeof (struct dynamic_prop_list
)));
5252 node_copy
->prop
= (*node_ptr
)->prop
;
5253 *node_ptr
= node_copy
;
5255 node_ptr
= &node_copy
->next
;
5261 /* Recursively copy (deep copy) TYPE, if it is associated with
5262 OBJFILE. Return a new type owned by the gdbarch associated with the type, a
5263 saved type if we have already visited TYPE (using COPIED_TYPES), or TYPE if
5264 it is not associated with OBJFILE. */
5267 copy_type_recursive (struct objfile
*objfile
,
5269 htab_t copied_types
)
5272 struct type
*new_type
;
5274 if (! TYPE_OBJFILE_OWNED (type
))
5277 /* This type shouldn't be pointing to any types in other objfiles;
5278 if it did, the type might disappear unexpectedly. */
5279 gdb_assert (TYPE_OBJFILE (type
) == objfile
);
5281 struct type_pair
pair (type
, nullptr);
5283 slot
= htab_find_slot (copied_types
, &pair
, INSERT
);
5285 return ((struct type_pair
*) *slot
)->newobj
;
5287 new_type
= alloc_type_arch (get_type_arch (type
));
5289 /* We must add the new type to the hash table immediately, in case
5290 we encounter this type again during a recursive call below. */
5291 struct type_pair
*stored
5292 = new (&objfile
->objfile_obstack
) struct type_pair (type
, new_type
);
5296 /* Copy the common fields of types. For the main type, we simply
5297 copy the entire thing and then update specific fields as needed. */
5298 *TYPE_MAIN_TYPE (new_type
) = *TYPE_MAIN_TYPE (type
);
5299 TYPE_OBJFILE_OWNED (new_type
) = 0;
5300 TYPE_OWNER (new_type
).gdbarch
= get_type_arch (type
);
5303 new_type
->set_name (xstrdup (type
->name ()));
5305 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
5306 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5308 /* Copy the fields. */
5309 if (type
->num_fields ())
5313 nfields
= type
->num_fields ();
5314 new_type
->set_fields
5316 TYPE_ZALLOC (new_type
, nfields
* sizeof (struct field
)));
5318 for (i
= 0; i
< nfields
; i
++)
5320 TYPE_FIELD_ARTIFICIAL (new_type
, i
) =
5321 TYPE_FIELD_ARTIFICIAL (type
, i
);
5322 TYPE_FIELD_BITSIZE (new_type
, i
) = TYPE_FIELD_BITSIZE (type
, i
);
5323 if (TYPE_FIELD_TYPE (type
, i
))
5324 new_type
->field (i
).set_type
5325 (copy_type_recursive (objfile
, TYPE_FIELD_TYPE (type
, i
),
5327 if (TYPE_FIELD_NAME (type
, i
))
5328 TYPE_FIELD_NAME (new_type
, i
) =
5329 xstrdup (TYPE_FIELD_NAME (type
, i
));
5330 switch (TYPE_FIELD_LOC_KIND (type
, i
))
5332 case FIELD_LOC_KIND_BITPOS
:
5333 SET_FIELD_BITPOS (new_type
->field (i
),
5334 TYPE_FIELD_BITPOS (type
, i
));
5336 case FIELD_LOC_KIND_ENUMVAL
:
5337 SET_FIELD_ENUMVAL (new_type
->field (i
),
5338 TYPE_FIELD_ENUMVAL (type
, i
));
5340 case FIELD_LOC_KIND_PHYSADDR
:
5341 SET_FIELD_PHYSADDR (new_type
->field (i
),
5342 TYPE_FIELD_STATIC_PHYSADDR (type
, i
));
5344 case FIELD_LOC_KIND_PHYSNAME
:
5345 SET_FIELD_PHYSNAME (new_type
->field (i
),
5346 xstrdup (TYPE_FIELD_STATIC_PHYSNAME (type
,
5350 internal_error (__FILE__
, __LINE__
,
5351 _("Unexpected type field location kind: %d"),
5352 TYPE_FIELD_LOC_KIND (type
, i
));
5357 /* For range types, copy the bounds information. */
5358 if (type
->code () == TYPE_CODE_RANGE
)
5360 TYPE_RANGE_DATA (new_type
) = (struct range_bounds
*)
5361 TYPE_ALLOC (new_type
, sizeof (struct range_bounds
));
5362 *TYPE_RANGE_DATA (new_type
) = *TYPE_RANGE_DATA (type
);
5365 if (type
->main_type
->dyn_prop_list
!= NULL
)
5366 new_type
->main_type
->dyn_prop_list
5367 = copy_dynamic_prop_list (&objfile
->objfile_obstack
,
5368 type
->main_type
->dyn_prop_list
);
5371 /* Copy pointers to other types. */
5372 if (TYPE_TARGET_TYPE (type
))
5373 TYPE_TARGET_TYPE (new_type
) =
5374 copy_type_recursive (objfile
,
5375 TYPE_TARGET_TYPE (type
),
5378 /* Maybe copy the type_specific bits.
5380 NOTE drow/2005-12-09: We do not copy the C++-specific bits like
5381 base classes and methods. There's no fundamental reason why we
5382 can't, but at the moment it is not needed. */
5384 switch (TYPE_SPECIFIC_FIELD (type
))
5386 case TYPE_SPECIFIC_NONE
:
5388 case TYPE_SPECIFIC_FUNC
:
5389 INIT_FUNC_SPECIFIC (new_type
);
5390 TYPE_CALLING_CONVENTION (new_type
) = TYPE_CALLING_CONVENTION (type
);
5391 TYPE_NO_RETURN (new_type
) = TYPE_NO_RETURN (type
);
5392 TYPE_TAIL_CALL_LIST (new_type
) = NULL
;
5394 case TYPE_SPECIFIC_FLOATFORMAT
:
5395 TYPE_FLOATFORMAT (new_type
) = TYPE_FLOATFORMAT (type
);
5397 case TYPE_SPECIFIC_CPLUS_STUFF
:
5398 INIT_CPLUS_SPECIFIC (new_type
);
5400 case TYPE_SPECIFIC_GNAT_STUFF
:
5401 INIT_GNAT_SPECIFIC (new_type
);
5403 case TYPE_SPECIFIC_SELF_TYPE
:
5404 set_type_self_type (new_type
,
5405 copy_type_recursive (objfile
, TYPE_SELF_TYPE (type
),
5409 gdb_assert_not_reached ("bad type_specific_kind");
5415 /* Make a copy of the given TYPE, except that the pointer & reference
5416 types are not preserved.
5418 This function assumes that the given type has an associated objfile.
5419 This objfile is used to allocate the new type. */
5422 copy_type (const struct type
*type
)
5424 struct type
*new_type
;
5426 gdb_assert (TYPE_OBJFILE_OWNED (type
));
5428 new_type
= alloc_type_copy (type
);
5429 TYPE_INSTANCE_FLAGS (new_type
) = TYPE_INSTANCE_FLAGS (type
);
5430 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5431 memcpy (TYPE_MAIN_TYPE (new_type
), TYPE_MAIN_TYPE (type
),
5432 sizeof (struct main_type
));
5433 if (type
->main_type
->dyn_prop_list
!= NULL
)
5434 new_type
->main_type
->dyn_prop_list
5435 = copy_dynamic_prop_list (&TYPE_OBJFILE (type
) -> objfile_obstack
,
5436 type
->main_type
->dyn_prop_list
);
5441 /* Helper functions to initialize architecture-specific types. */
5443 /* Allocate a type structure associated with GDBARCH and set its
5444 CODE, LENGTH, and NAME fields. */
5447 arch_type (struct gdbarch
*gdbarch
,
5448 enum type_code code
, int bit
, const char *name
)
5452 type
= alloc_type_arch (gdbarch
);
5453 set_type_code (type
, code
);
5454 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
5455 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
5458 type
->set_name (gdbarch_obstack_strdup (gdbarch
, name
));
5463 /* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
5464 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5465 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5468 arch_integer_type (struct gdbarch
*gdbarch
,
5469 int bit
, int unsigned_p
, const char *name
)
5473 t
= arch_type (gdbarch
, TYPE_CODE_INT
, bit
, name
);
5475 TYPE_UNSIGNED (t
) = 1;
5480 /* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
5481 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5482 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5485 arch_character_type (struct gdbarch
*gdbarch
,
5486 int bit
, int unsigned_p
, const char *name
)
5490 t
= arch_type (gdbarch
, TYPE_CODE_CHAR
, bit
, name
);
5492 TYPE_UNSIGNED (t
) = 1;
5497 /* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
5498 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5499 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5502 arch_boolean_type (struct gdbarch
*gdbarch
,
5503 int bit
, int unsigned_p
, const char *name
)
5507 t
= arch_type (gdbarch
, TYPE_CODE_BOOL
, bit
, name
);
5509 TYPE_UNSIGNED (t
) = 1;
5514 /* Allocate a TYPE_CODE_FLT type structure associated with GDBARCH.
5515 BIT is the type size in bits; if BIT equals -1, the size is
5516 determined by the floatformat. NAME is the type name. Set the
5517 TYPE_FLOATFORMAT from FLOATFORMATS. */
5520 arch_float_type (struct gdbarch
*gdbarch
,
5521 int bit
, const char *name
,
5522 const struct floatformat
**floatformats
)
5524 const struct floatformat
*fmt
= floatformats
[gdbarch_byte_order (gdbarch
)];
5527 bit
= verify_floatformat (bit
, fmt
);
5528 t
= arch_type (gdbarch
, TYPE_CODE_FLT
, bit
, name
);
5529 TYPE_FLOATFORMAT (t
) = fmt
;
5534 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with GDBARCH.
5535 BIT is the type size in bits. NAME is the type name. */
5538 arch_decfloat_type (struct gdbarch
*gdbarch
, int bit
, const char *name
)
5542 t
= arch_type (gdbarch
, TYPE_CODE_DECFLOAT
, bit
, name
);
5546 /* Allocate a TYPE_CODE_PTR type structure associated with GDBARCH.
5547 BIT is the pointer type size in bits. NAME is the type name.
5548 TARGET_TYPE is the pointer target type. Always sets the pointer type's
5549 TYPE_UNSIGNED flag. */
5552 arch_pointer_type (struct gdbarch
*gdbarch
,
5553 int bit
, const char *name
, struct type
*target_type
)
5557 t
= arch_type (gdbarch
, TYPE_CODE_PTR
, bit
, name
);
5558 TYPE_TARGET_TYPE (t
) = target_type
;
5559 TYPE_UNSIGNED (t
) = 1;
5563 /* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
5564 NAME is the type name. BIT is the size of the flag word in bits. */
5567 arch_flags_type (struct gdbarch
*gdbarch
, const char *name
, int bit
)
5571 type
= arch_type (gdbarch
, TYPE_CODE_FLAGS
, bit
, name
);
5572 TYPE_UNSIGNED (type
) = 1;
5573 type
->set_num_fields (0);
5574 /* Pre-allocate enough space assuming every field is one bit. */
5576 ((struct field
*) TYPE_ZALLOC (type
, bit
* sizeof (struct field
)));
5581 /* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5582 position BITPOS is called NAME. Pass NAME as "" for fields that
5583 should not be printed. */
5586 append_flags_type_field (struct type
*type
, int start_bitpos
, int nr_bits
,
5587 struct type
*field_type
, const char *name
)
5589 int type_bitsize
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
5590 int field_nr
= type
->num_fields ();
5592 gdb_assert (type
->code () == TYPE_CODE_FLAGS
);
5593 gdb_assert (type
->num_fields () + 1 <= type_bitsize
);
5594 gdb_assert (start_bitpos
>= 0 && start_bitpos
< type_bitsize
);
5595 gdb_assert (nr_bits
>= 1 && nr_bits
<= type_bitsize
);
5596 gdb_assert (name
!= NULL
);
5598 TYPE_FIELD_NAME (type
, field_nr
) = xstrdup (name
);
5599 type
->field (field_nr
).set_type (field_type
);
5600 SET_FIELD_BITPOS (type
->field (field_nr
), start_bitpos
);
5601 TYPE_FIELD_BITSIZE (type
, field_nr
) = nr_bits
;
5602 type
->set_num_fields (type
->num_fields () + 1);
5605 /* Special version of append_flags_type_field to add a flag field.
5606 Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5607 position BITPOS is called NAME. */
5610 append_flags_type_flag (struct type
*type
, int bitpos
, const char *name
)
5612 struct gdbarch
*gdbarch
= get_type_arch (type
);
5614 append_flags_type_field (type
, bitpos
, 1,
5615 builtin_type (gdbarch
)->builtin_bool
,
5619 /* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
5620 specified by CODE) associated with GDBARCH. NAME is the type name. */
5623 arch_composite_type (struct gdbarch
*gdbarch
, const char *name
,
5624 enum type_code code
)
5628 gdb_assert (code
== TYPE_CODE_STRUCT
|| code
== TYPE_CODE_UNION
);
5629 t
= arch_type (gdbarch
, code
, 0, NULL
);
5631 INIT_CPLUS_SPECIFIC (t
);
5635 /* Add new field with name NAME and type FIELD to composite type T.
5636 Do not set the field's position or adjust the type's length;
5637 the caller should do so. Return the new field. */
5640 append_composite_type_field_raw (struct type
*t
, const char *name
,
5645 t
->set_num_fields (t
->num_fields () + 1);
5646 t
->set_fields (XRESIZEVEC (struct field
, t
->fields (),
5648 f
= &t
->field (t
->num_fields () - 1);
5649 memset (f
, 0, sizeof f
[0]);
5650 f
[0].set_type (field
);
5651 FIELD_NAME (f
[0]) = name
;
5655 /* Add new field with name NAME and type FIELD to composite type T.
5656 ALIGNMENT (if non-zero) specifies the minimum field alignment. */
5659 append_composite_type_field_aligned (struct type
*t
, const char *name
,
5660 struct type
*field
, int alignment
)
5662 struct field
*f
= append_composite_type_field_raw (t
, name
, field
);
5664 if (t
->code () == TYPE_CODE_UNION
)
5666 if (TYPE_LENGTH (t
) < TYPE_LENGTH (field
))
5667 TYPE_LENGTH (t
) = TYPE_LENGTH (field
);
5669 else if (t
->code () == TYPE_CODE_STRUCT
)
5671 TYPE_LENGTH (t
) = TYPE_LENGTH (t
) + TYPE_LENGTH (field
);
5672 if (t
->num_fields () > 1)
5674 SET_FIELD_BITPOS (f
[0],
5675 (FIELD_BITPOS (f
[-1])
5676 + (TYPE_LENGTH (FIELD_TYPE (f
[-1]))
5677 * TARGET_CHAR_BIT
)));
5683 alignment
*= TARGET_CHAR_BIT
;
5684 left
= FIELD_BITPOS (f
[0]) % alignment
;
5688 SET_FIELD_BITPOS (f
[0], FIELD_BITPOS (f
[0]) + (alignment
- left
));
5689 TYPE_LENGTH (t
) += (alignment
- left
) / TARGET_CHAR_BIT
;
5696 /* Add new field with name NAME and type FIELD to composite type T. */
5699 append_composite_type_field (struct type
*t
, const char *name
,
5702 append_composite_type_field_aligned (t
, name
, field
, 0);
5705 static struct gdbarch_data
*gdbtypes_data
;
5707 const struct builtin_type
*
5708 builtin_type (struct gdbarch
*gdbarch
)
5710 return (const struct builtin_type
*) gdbarch_data (gdbarch
, gdbtypes_data
);
5714 gdbtypes_post_init (struct gdbarch
*gdbarch
)
5716 struct builtin_type
*builtin_type
5717 = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct builtin_type
);
5720 builtin_type
->builtin_void
5721 = arch_type (gdbarch
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5722 builtin_type
->builtin_char
5723 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5724 !gdbarch_char_signed (gdbarch
), "char");
5725 TYPE_NOSIGN (builtin_type
->builtin_char
) = 1;
5726 builtin_type
->builtin_signed_char
5727 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5729 builtin_type
->builtin_unsigned_char
5730 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
5731 1, "unsigned char");
5732 builtin_type
->builtin_short
5733 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5735 builtin_type
->builtin_unsigned_short
5736 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
5737 1, "unsigned short");
5738 builtin_type
->builtin_int
5739 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5741 builtin_type
->builtin_unsigned_int
5742 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
5744 builtin_type
->builtin_long
5745 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5747 builtin_type
->builtin_unsigned_long
5748 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
5749 1, "unsigned long");
5750 builtin_type
->builtin_long_long
5751 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5753 builtin_type
->builtin_unsigned_long_long
5754 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
5755 1, "unsigned long long");
5756 builtin_type
->builtin_half
5757 = arch_float_type (gdbarch
, gdbarch_half_bit (gdbarch
),
5758 "half", gdbarch_half_format (gdbarch
));
5759 builtin_type
->builtin_float
5760 = arch_float_type (gdbarch
, gdbarch_float_bit (gdbarch
),
5761 "float", gdbarch_float_format (gdbarch
));
5762 builtin_type
->builtin_double
5763 = arch_float_type (gdbarch
, gdbarch_double_bit (gdbarch
),
5764 "double", gdbarch_double_format (gdbarch
));
5765 builtin_type
->builtin_long_double
5766 = arch_float_type (gdbarch
, gdbarch_long_double_bit (gdbarch
),
5767 "long double", gdbarch_long_double_format (gdbarch
));
5768 builtin_type
->builtin_complex
5769 = init_complex_type ("complex", builtin_type
->builtin_float
);
5770 builtin_type
->builtin_double_complex
5771 = init_complex_type ("double complex", builtin_type
->builtin_double
);
5772 builtin_type
->builtin_string
5773 = arch_type (gdbarch
, TYPE_CODE_STRING
, TARGET_CHAR_BIT
, "string");
5774 builtin_type
->builtin_bool
5775 = arch_type (gdbarch
, TYPE_CODE_BOOL
, TARGET_CHAR_BIT
, "bool");
5777 /* The following three are about decimal floating point types, which
5778 are 32-bits, 64-bits and 128-bits respectively. */
5779 builtin_type
->builtin_decfloat
5780 = arch_decfloat_type (gdbarch
, 32, "_Decimal32");
5781 builtin_type
->builtin_decdouble
5782 = arch_decfloat_type (gdbarch
, 64, "_Decimal64");
5783 builtin_type
->builtin_declong
5784 = arch_decfloat_type (gdbarch
, 128, "_Decimal128");
5786 /* "True" character types. */
5787 builtin_type
->builtin_true_char
5788 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 0, "true character");
5789 builtin_type
->builtin_true_unsigned_char
5790 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 1, "true character");
5792 /* Fixed-size integer types. */
5793 builtin_type
->builtin_int0
5794 = arch_integer_type (gdbarch
, 0, 0, "int0_t");
5795 builtin_type
->builtin_int8
5796 = arch_integer_type (gdbarch
, 8, 0, "int8_t");
5797 builtin_type
->builtin_uint8
5798 = arch_integer_type (gdbarch
, 8, 1, "uint8_t");
5799 builtin_type
->builtin_int16
5800 = arch_integer_type (gdbarch
, 16, 0, "int16_t");
5801 builtin_type
->builtin_uint16
5802 = arch_integer_type (gdbarch
, 16, 1, "uint16_t");
5803 builtin_type
->builtin_int24
5804 = arch_integer_type (gdbarch
, 24, 0, "int24_t");
5805 builtin_type
->builtin_uint24
5806 = arch_integer_type (gdbarch
, 24, 1, "uint24_t");
5807 builtin_type
->builtin_int32
5808 = arch_integer_type (gdbarch
, 32, 0, "int32_t");
5809 builtin_type
->builtin_uint32
5810 = arch_integer_type (gdbarch
, 32, 1, "uint32_t");
5811 builtin_type
->builtin_int64
5812 = arch_integer_type (gdbarch
, 64, 0, "int64_t");
5813 builtin_type
->builtin_uint64
5814 = arch_integer_type (gdbarch
, 64, 1, "uint64_t");
5815 builtin_type
->builtin_int128
5816 = arch_integer_type (gdbarch
, 128, 0, "int128_t");
5817 builtin_type
->builtin_uint128
5818 = arch_integer_type (gdbarch
, 128, 1, "uint128_t");
5819 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_int8
) |=
5820 TYPE_INSTANCE_FLAG_NOTTEXT
;
5821 TYPE_INSTANCE_FLAGS (builtin_type
->builtin_uint8
) |=
5822 TYPE_INSTANCE_FLAG_NOTTEXT
;
5824 /* Wide character types. */
5825 builtin_type
->builtin_char16
5826 = arch_integer_type (gdbarch
, 16, 1, "char16_t");
5827 builtin_type
->builtin_char32
5828 = arch_integer_type (gdbarch
, 32, 1, "char32_t");
5829 builtin_type
->builtin_wchar
5830 = arch_integer_type (gdbarch
, gdbarch_wchar_bit (gdbarch
),
5831 !gdbarch_wchar_signed (gdbarch
), "wchar_t");
5833 /* Default data/code pointer types. */
5834 builtin_type
->builtin_data_ptr
5835 = lookup_pointer_type (builtin_type
->builtin_void
);
5836 builtin_type
->builtin_func_ptr
5837 = lookup_pointer_type (lookup_function_type (builtin_type
->builtin_void
));
5838 builtin_type
->builtin_func_func
5839 = lookup_function_type (builtin_type
->builtin_func_ptr
);
5841 /* This type represents a GDB internal function. */
5842 builtin_type
->internal_fn
5843 = arch_type (gdbarch
, TYPE_CODE_INTERNAL_FUNCTION
, 0,
5844 "<internal function>");
5846 /* This type represents an xmethod. */
5847 builtin_type
->xmethod
5848 = arch_type (gdbarch
, TYPE_CODE_XMETHOD
, 0, "<xmethod>");
5850 return builtin_type
;
5853 /* This set of objfile-based types is intended to be used by symbol
5854 readers as basic types. */
5856 static const struct objfile_key
<struct objfile_type
,
5857 gdb::noop_deleter
<struct objfile_type
>>
5860 const struct objfile_type
*
5861 objfile_type (struct objfile
*objfile
)
5863 struct gdbarch
*gdbarch
;
5864 struct objfile_type
*objfile_type
= objfile_type_data
.get (objfile
);
5867 return objfile_type
;
5869 objfile_type
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
5870 1, struct objfile_type
);
5872 /* Use the objfile architecture to determine basic type properties. */
5873 gdbarch
= objfile
->arch ();
5876 objfile_type
->builtin_void
5877 = init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
5878 objfile_type
->builtin_char
5879 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5880 !gdbarch_char_signed (gdbarch
), "char");
5881 TYPE_NOSIGN (objfile_type
->builtin_char
) = 1;
5882 objfile_type
->builtin_signed_char
5883 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5885 objfile_type
->builtin_unsigned_char
5886 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
5887 1, "unsigned char");
5888 objfile_type
->builtin_short
5889 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5891 objfile_type
->builtin_unsigned_short
5892 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
5893 1, "unsigned short");
5894 objfile_type
->builtin_int
5895 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5897 objfile_type
->builtin_unsigned_int
5898 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
5900 objfile_type
->builtin_long
5901 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5903 objfile_type
->builtin_unsigned_long
5904 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
5905 1, "unsigned long");
5906 objfile_type
->builtin_long_long
5907 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5909 objfile_type
->builtin_unsigned_long_long
5910 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
5911 1, "unsigned long long");
5912 objfile_type
->builtin_float
5913 = init_float_type (objfile
, gdbarch_float_bit (gdbarch
),
5914 "float", gdbarch_float_format (gdbarch
));
5915 objfile_type
->builtin_double
5916 = init_float_type (objfile
, gdbarch_double_bit (gdbarch
),
5917 "double", gdbarch_double_format (gdbarch
));
5918 objfile_type
->builtin_long_double
5919 = init_float_type (objfile
, gdbarch_long_double_bit (gdbarch
),
5920 "long double", gdbarch_long_double_format (gdbarch
));
5922 /* This type represents a type that was unrecognized in symbol read-in. */
5923 objfile_type
->builtin_error
5924 = init_type (objfile
, TYPE_CODE_ERROR
, 0, "<unknown type>");
5926 /* The following set of types is used for symbols with no
5927 debug information. */
5928 objfile_type
->nodebug_text_symbol
5929 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5930 "<text variable, no debug info>");
5931 objfile_type
->nodebug_text_gnu_ifunc_symbol
5932 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
5933 "<text gnu-indirect-function variable, no debug info>");
5934 TYPE_GNU_IFUNC (objfile_type
->nodebug_text_gnu_ifunc_symbol
) = 1;
5935 objfile_type
->nodebug_got_plt_symbol
5936 = init_pointer_type (objfile
, gdbarch_addr_bit (gdbarch
),
5937 "<text from jump slot in .got.plt, no debug info>",
5938 objfile_type
->nodebug_text_symbol
);
5939 objfile_type
->nodebug_data_symbol
5940 = init_nodebug_var_type (objfile
, "<data variable, no debug info>");
5941 objfile_type
->nodebug_unknown_symbol
5942 = init_nodebug_var_type (objfile
, "<variable (not text or data), no debug info>");
5943 objfile_type
->nodebug_tls_symbol
5944 = init_nodebug_var_type (objfile
, "<thread local variable, no debug info>");
5946 /* NOTE: on some targets, addresses and pointers are not necessarily
5950 - gdb's `struct type' always describes the target's
5952 - gdb's `struct value' objects should always hold values in
5954 - gdb's CORE_ADDR values are addresses in the unified virtual
5955 address space that the assembler and linker work with. Thus,
5956 since target_read_memory takes a CORE_ADDR as an argument, it
5957 can access any memory on the target, even if the processor has
5958 separate code and data address spaces.
5960 In this context, objfile_type->builtin_core_addr is a bit odd:
5961 it's a target type for a value the target will never see. It's
5962 only used to hold the values of (typeless) linker symbols, which
5963 are indeed in the unified virtual address space. */
5965 objfile_type
->builtin_core_addr
5966 = init_integer_type (objfile
, gdbarch_addr_bit (gdbarch
), 1,
5969 objfile_type_data
.set (objfile
, objfile_type
);
5970 return objfile_type
;
5973 void _initialize_gdbtypes ();
5975 _initialize_gdbtypes ()
5977 gdbtypes_data
= gdbarch_data_register_post_init (gdbtypes_post_init
);
5979 add_setshow_zuinteger_cmd ("overload", no_class
, &overload_debug
,
5980 _("Set debugging of C++ overloading."),
5981 _("Show debugging of C++ overloading."),
5982 _("When enabled, ranking of the "
5983 "functions is displayed."),
5985 show_overload_debug
,
5986 &setdebuglist
, &showdebuglist
);
5988 /* Add user knob for controlling resolution of opaque types. */
5989 add_setshow_boolean_cmd ("opaque-type-resolution", class_support
,
5990 &opaque_type_resolution
,
5991 _("Set resolution of opaque struct/class/union"
5992 " types (if set before loading symbols)."),
5993 _("Show resolution of opaque struct/class/union"
5994 " types (if set before loading symbols)."),
5996 show_opaque_type_resolution
,
5997 &setlist
, &showlist
);
5999 /* Add an option to permit non-strict type checking. */
6000 add_setshow_boolean_cmd ("type", class_support
,
6001 &strict_type_checking
,
6002 _("Set strict type checking."),
6003 _("Show strict type checking."),
6005 show_strict_type_checking
,
6006 &setchecklist
, &showchecklist
);