1 /* Support routines for manipulating internal types for GDB.
3 Copyright (C) 1992-2022 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"
40 #include "dwarf2/read.h"
42 #include "floatformat.h"
45 #include "gmp-utils.h"
47 /* Initialize BADNESS constants. */
49 const struct rank LENGTH_MISMATCH_BADNESS
= {100,0};
51 const struct rank TOO_FEW_PARAMS_BADNESS
= {100,0};
52 const struct rank INCOMPATIBLE_TYPE_BADNESS
= {100,0};
54 const struct rank EXACT_MATCH_BADNESS
= {0,0};
56 const struct rank INTEGER_PROMOTION_BADNESS
= {1,0};
57 const struct rank FLOAT_PROMOTION_BADNESS
= {1,0};
58 const struct rank BASE_PTR_CONVERSION_BADNESS
= {1,0};
59 const struct rank CV_CONVERSION_BADNESS
= {1, 0};
60 const struct rank INTEGER_CONVERSION_BADNESS
= {2,0};
61 const struct rank FLOAT_CONVERSION_BADNESS
= {2,0};
62 const struct rank INT_FLOAT_CONVERSION_BADNESS
= {2,0};
63 const struct rank VOID_PTR_CONVERSION_BADNESS
= {2,0};
64 const struct rank BOOL_CONVERSION_BADNESS
= {3,0};
65 const struct rank BASE_CONVERSION_BADNESS
= {2,0};
66 const struct rank REFERENCE_CONVERSION_BADNESS
= {2,0};
67 const struct rank REFERENCE_SEE_THROUGH_BADNESS
= {0,1};
68 const struct rank NULL_POINTER_CONVERSION_BADNESS
= {2,0};
69 const struct rank NS_POINTER_CONVERSION_BADNESS
= {10,0};
70 const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS
= {3,0};
72 /* Floatformat pairs. */
73 const struct floatformat
*floatformats_ieee_half
[BFD_ENDIAN_UNKNOWN
] = {
74 &floatformat_ieee_half_big
,
75 &floatformat_ieee_half_little
77 const struct floatformat
*floatformats_ieee_single
[BFD_ENDIAN_UNKNOWN
] = {
78 &floatformat_ieee_single_big
,
79 &floatformat_ieee_single_little
81 const struct floatformat
*floatformats_ieee_double
[BFD_ENDIAN_UNKNOWN
] = {
82 &floatformat_ieee_double_big
,
83 &floatformat_ieee_double_little
85 const struct floatformat
*floatformats_ieee_double_littlebyte_bigword
[BFD_ENDIAN_UNKNOWN
] = {
86 &floatformat_ieee_double_big
,
87 &floatformat_ieee_double_littlebyte_bigword
89 const struct floatformat
*floatformats_i387_ext
[BFD_ENDIAN_UNKNOWN
] = {
90 &floatformat_i387_ext
,
93 const struct floatformat
*floatformats_m68881_ext
[BFD_ENDIAN_UNKNOWN
] = {
94 &floatformat_m68881_ext
,
95 &floatformat_m68881_ext
97 const struct floatformat
*floatformats_arm_ext
[BFD_ENDIAN_UNKNOWN
] = {
98 &floatformat_arm_ext_big
,
99 &floatformat_arm_ext_littlebyte_bigword
101 const struct floatformat
*floatformats_ia64_spill
[BFD_ENDIAN_UNKNOWN
] = {
102 &floatformat_ia64_spill_big
,
103 &floatformat_ia64_spill_little
105 const struct floatformat
*floatformats_ia64_quad
[BFD_ENDIAN_UNKNOWN
] = {
106 &floatformat_ia64_quad_big
,
107 &floatformat_ia64_quad_little
109 const struct floatformat
*floatformats_vax_f
[BFD_ENDIAN_UNKNOWN
] = {
113 const struct floatformat
*floatformats_vax_d
[BFD_ENDIAN_UNKNOWN
] = {
117 const struct floatformat
*floatformats_ibm_long_double
[BFD_ENDIAN_UNKNOWN
] = {
118 &floatformat_ibm_long_double_big
,
119 &floatformat_ibm_long_double_little
121 const struct floatformat
*floatformats_bfloat16
[BFD_ENDIAN_UNKNOWN
] = {
122 &floatformat_bfloat16_big
,
123 &floatformat_bfloat16_little
126 /* Should opaque types be resolved? */
128 static bool opaque_type_resolution
= true;
130 /* See gdbtypes.h. */
132 unsigned int overload_debug
= 0;
134 /* A flag to enable strict type checking. */
136 static bool strict_type_checking
= true;
138 /* A function to show whether opaque types are resolved. */
141 show_opaque_type_resolution (struct ui_file
*file
, int from_tty
,
142 struct cmd_list_element
*c
,
145 fprintf_filtered (file
, _("Resolution of opaque struct/class/union types "
146 "(if set before loading symbols) is %s.\n"),
150 /* A function to show whether C++ overload debugging is enabled. */
153 show_overload_debug (struct ui_file
*file
, int from_tty
,
154 struct cmd_list_element
*c
, const char *value
)
156 fprintf_filtered (file
, _("Debugging of C++ overloading is %s.\n"),
160 /* A function to show the status of strict type checking. */
163 show_strict_type_checking (struct ui_file
*file
, int from_tty
,
164 struct cmd_list_element
*c
, const char *value
)
166 fprintf_filtered (file
, _("Strict type checking is %s.\n"), value
);
170 /* Allocate a new OBJFILE-associated type structure and fill it
171 with some defaults. Space for the type structure is allocated
172 on the objfile's objfile_obstack. */
175 alloc_type (struct objfile
*objfile
)
179 gdb_assert (objfile
!= NULL
);
181 /* Alloc the structure and start off with all fields zeroed. */
182 type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct type
);
183 TYPE_MAIN_TYPE (type
) = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
185 OBJSTAT (objfile
, n_types
++);
187 type
->set_owner (objfile
);
189 /* Initialize the fields that might not be zero. */
191 type
->set_code (TYPE_CODE_UNDEF
);
192 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
197 /* Allocate a new GDBARCH-associated type structure and fill it
198 with some defaults. Space for the type structure is allocated
199 on the obstack associated with GDBARCH. */
202 alloc_type_arch (struct gdbarch
*gdbarch
)
206 gdb_assert (gdbarch
!= NULL
);
208 /* Alloc the structure and start off with all fields zeroed. */
210 type
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct type
);
211 TYPE_MAIN_TYPE (type
) = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct main_type
);
213 type
->set_owner (gdbarch
);
215 /* Initialize the fields that might not be zero. */
217 type
->set_code (TYPE_CODE_UNDEF
);
218 TYPE_CHAIN (type
) = type
; /* Chain back to itself. */
223 /* If TYPE is objfile-associated, allocate a new type structure
224 associated with the same objfile. If TYPE is gdbarch-associated,
225 allocate a new type structure associated with the same gdbarch. */
228 alloc_type_copy (const struct type
*type
)
230 if (type
->is_objfile_owned ())
231 return alloc_type (type
->objfile_owner ());
233 return alloc_type_arch (type
->arch_owner ());
236 /* See gdbtypes.h. */
241 struct gdbarch
*arch
;
243 if (this->is_objfile_owned ())
244 arch
= this->objfile_owner ()->arch ();
246 arch
= this->arch_owner ();
248 /* The ARCH can be NULL if TYPE is associated with neither an objfile nor
249 a gdbarch, however, this is very rare, and even then, in most cases
250 that type::arch is called, we assume that a non-NULL value is
252 gdb_assert (arch
!= nullptr);
256 /* See gdbtypes.h. */
259 get_target_type (struct type
*type
)
263 type
= TYPE_TARGET_TYPE (type
);
265 type
= check_typedef (type
);
271 /* See gdbtypes.h. */
274 type_length_units (struct type
*type
)
276 int unit_size
= gdbarch_addressable_memory_unit_size (type
->arch ());
278 return TYPE_LENGTH (type
) / unit_size
;
281 /* Alloc a new type instance structure, fill it with some defaults,
282 and point it at OLDTYPE. Allocate the new type instance from the
283 same place as OLDTYPE. */
286 alloc_type_instance (struct type
*oldtype
)
290 /* Allocate the structure. */
292 if (!oldtype
->is_objfile_owned ())
293 type
= GDBARCH_OBSTACK_ZALLOC (oldtype
->arch_owner (), struct type
);
295 type
= OBSTACK_ZALLOC (&oldtype
->objfile_owner ()->objfile_obstack
,
298 TYPE_MAIN_TYPE (type
) = TYPE_MAIN_TYPE (oldtype
);
300 TYPE_CHAIN (type
) = type
; /* Chain back to itself for now. */
305 /* Clear all remnants of the previous type at TYPE, in preparation for
306 replacing it with something else. Preserve owner information. */
309 smash_type (struct type
*type
)
311 bool objfile_owned
= type
->is_objfile_owned ();
312 objfile
*objfile
= type
->objfile_owner ();
313 gdbarch
*arch
= type
->arch_owner ();
315 memset (TYPE_MAIN_TYPE (type
), 0, sizeof (struct main_type
));
317 /* Restore owner information. */
319 type
->set_owner (objfile
);
321 type
->set_owner (arch
);
323 /* For now, delete the rings. */
324 TYPE_CHAIN (type
) = type
;
326 /* For now, leave the pointer/reference types alone. */
329 /* Lookup a pointer to a type TYPE. TYPEPTR, if nonzero, points
330 to a pointer to memory where the pointer type should be stored.
331 If *TYPEPTR is zero, update it to point to the pointer type we return.
332 We allocate new memory if needed. */
335 make_pointer_type (struct type
*type
, struct type
**typeptr
)
337 struct type
*ntype
; /* New type */
340 ntype
= TYPE_POINTER_TYPE (type
);
345 return ntype
; /* Don't care about alloc,
346 and have new type. */
347 else if (*typeptr
== 0)
349 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
354 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
356 ntype
= alloc_type_copy (type
);
360 else /* We have storage, but need to reset it. */
363 chain
= TYPE_CHAIN (ntype
);
365 TYPE_CHAIN (ntype
) = chain
;
368 TYPE_TARGET_TYPE (ntype
) = type
;
369 TYPE_POINTER_TYPE (type
) = ntype
;
371 /* FIXME! Assumes the machine has only one representation for pointers! */
373 TYPE_LENGTH (ntype
) = gdbarch_ptr_bit (type
->arch ()) / TARGET_CHAR_BIT
;
374 ntype
->set_code (TYPE_CODE_PTR
);
376 /* Mark pointers as unsigned. The target converts between pointers
377 and addresses (CORE_ADDRs) using gdbarch_pointer_to_address and
378 gdbarch_address_to_pointer. */
379 ntype
->set_is_unsigned (true);
381 /* Update the length of all the other variants of this type. */
382 chain
= TYPE_CHAIN (ntype
);
383 while (chain
!= ntype
)
385 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
386 chain
= TYPE_CHAIN (chain
);
392 /* Given a type TYPE, return a type of pointers to that type.
393 May need to construct such a type if this is the first use. */
396 lookup_pointer_type (struct type
*type
)
398 return make_pointer_type (type
, (struct type
**) 0);
401 /* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero,
402 points to a pointer to memory where the reference type should be
403 stored. If *TYPEPTR is zero, update it to point to the reference
404 type we return. We allocate new memory if needed. REFCODE denotes
405 the kind of reference type to lookup (lvalue or rvalue reference). */
408 make_reference_type (struct type
*type
, struct type
**typeptr
,
409 enum type_code refcode
)
411 struct type
*ntype
; /* New type */
412 struct type
**reftype
;
415 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
417 ntype
= (refcode
== TYPE_CODE_REF
? TYPE_REFERENCE_TYPE (type
)
418 : TYPE_RVALUE_REFERENCE_TYPE (type
));
423 return ntype
; /* Don't care about alloc,
424 and have new type. */
425 else if (*typeptr
== 0)
427 *typeptr
= ntype
; /* Tracking alloc, and have new type. */
432 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
434 ntype
= alloc_type_copy (type
);
438 else /* We have storage, but need to reset it. */
441 chain
= TYPE_CHAIN (ntype
);
443 TYPE_CHAIN (ntype
) = chain
;
446 TYPE_TARGET_TYPE (ntype
) = type
;
447 reftype
= (refcode
== TYPE_CODE_REF
? &TYPE_REFERENCE_TYPE (type
)
448 : &TYPE_RVALUE_REFERENCE_TYPE (type
));
452 /* FIXME! Assume the machine has only one representation for
453 references, and that it matches the (only) representation for
456 TYPE_LENGTH (ntype
) = gdbarch_ptr_bit (type
->arch ()) / TARGET_CHAR_BIT
;
457 ntype
->set_code (refcode
);
461 /* Update the length of all the other variants of this type. */
462 chain
= TYPE_CHAIN (ntype
);
463 while (chain
!= ntype
)
465 TYPE_LENGTH (chain
) = TYPE_LENGTH (ntype
);
466 chain
= TYPE_CHAIN (chain
);
472 /* Same as above, but caller doesn't care about memory allocation
476 lookup_reference_type (struct type
*type
, enum type_code refcode
)
478 return make_reference_type (type
, (struct type
**) 0, refcode
);
481 /* Lookup the lvalue reference type for the type TYPE. */
484 lookup_lvalue_reference_type (struct type
*type
)
486 return lookup_reference_type (type
, TYPE_CODE_REF
);
489 /* Lookup the rvalue reference type for the type TYPE. */
492 lookup_rvalue_reference_type (struct type
*type
)
494 return lookup_reference_type (type
, TYPE_CODE_RVALUE_REF
);
497 /* Lookup a function type that returns type TYPE. TYPEPTR, if
498 nonzero, points to a pointer to memory where the function type
499 should be stored. If *TYPEPTR is zero, update it to point to the
500 function type we return. We allocate new memory if needed. */
503 make_function_type (struct type
*type
, struct type
**typeptr
)
505 struct type
*ntype
; /* New type */
507 if (typeptr
== 0 || *typeptr
== 0) /* We'll need to allocate one. */
509 ntype
= alloc_type_copy (type
);
513 else /* We have storage, but need to reset it. */
519 TYPE_TARGET_TYPE (ntype
) = type
;
521 TYPE_LENGTH (ntype
) = 1;
522 ntype
->set_code (TYPE_CODE_FUNC
);
524 INIT_FUNC_SPECIFIC (ntype
);
529 /* Given a type TYPE, return a type of functions that return that type.
530 May need to construct such a type if this is the first use. */
533 lookup_function_type (struct type
*type
)
535 return make_function_type (type
, (struct type
**) 0);
538 /* Given a type TYPE and argument types, return the appropriate
539 function type. If the final type in PARAM_TYPES is NULL, make a
543 lookup_function_type_with_arguments (struct type
*type
,
545 struct type
**param_types
)
547 struct type
*fn
= make_function_type (type
, (struct type
**) 0);
552 if (param_types
[nparams
- 1] == NULL
)
555 fn
->set_has_varargs (true);
557 else if (check_typedef (param_types
[nparams
- 1])->code ()
561 /* Caller should have ensured this. */
562 gdb_assert (nparams
== 0);
563 fn
->set_is_prototyped (true);
566 fn
->set_is_prototyped (true);
569 fn
->set_num_fields (nparams
);
571 ((struct field
*) TYPE_ZALLOC (fn
, nparams
* sizeof (struct field
)));
572 for (i
= 0; i
< nparams
; ++i
)
573 fn
->field (i
).set_type (param_types
[i
]);
578 /* Identify address space identifier by name -- return a
579 type_instance_flags. */
582 address_space_name_to_type_instance_flags (struct gdbarch
*gdbarch
,
583 const char *space_identifier
)
585 type_instance_flags type_flags
;
587 /* Check for known address space delimiters. */
588 if (!strcmp (space_identifier
, "code"))
589 return TYPE_INSTANCE_FLAG_CODE_SPACE
;
590 else if (!strcmp (space_identifier
, "data"))
591 return TYPE_INSTANCE_FLAG_DATA_SPACE
;
592 else if (gdbarch_address_class_name_to_type_flags_p (gdbarch
)
593 && gdbarch_address_class_name_to_type_flags (gdbarch
,
598 error (_("Unknown address space specifier: \"%s\""), space_identifier
);
601 /* Identify address space identifier by type_instance_flags and return
602 the string version of the adress space name. */
605 address_space_type_instance_flags_to_name (struct gdbarch
*gdbarch
,
606 type_instance_flags space_flag
)
608 if (space_flag
& TYPE_INSTANCE_FLAG_CODE_SPACE
)
610 else if (space_flag
& TYPE_INSTANCE_FLAG_DATA_SPACE
)
612 else if ((space_flag
& TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
613 && gdbarch_address_class_type_flags_to_name_p (gdbarch
))
614 return gdbarch_address_class_type_flags_to_name (gdbarch
, space_flag
);
619 /* Create a new type with instance flags NEW_FLAGS, based on TYPE.
621 If STORAGE is non-NULL, create the new type instance there.
622 STORAGE must be in the same obstack as TYPE. */
625 make_qualified_type (struct type
*type
, type_instance_flags new_flags
,
626 struct type
*storage
)
633 if (ntype
->instance_flags () == new_flags
)
635 ntype
= TYPE_CHAIN (ntype
);
637 while (ntype
!= type
);
639 /* Create a new type instance. */
641 ntype
= alloc_type_instance (type
);
644 /* If STORAGE was provided, it had better be in the same objfile
645 as TYPE. Otherwise, we can't link it into TYPE's cv chain:
646 if one objfile is freed and the other kept, we'd have
647 dangling pointers. */
648 gdb_assert (type
->objfile_owner () == storage
->objfile_owner ());
651 TYPE_MAIN_TYPE (ntype
) = TYPE_MAIN_TYPE (type
);
652 TYPE_CHAIN (ntype
) = ntype
;
655 /* Pointers or references to the original type are not relevant to
657 TYPE_POINTER_TYPE (ntype
) = (struct type
*) 0;
658 TYPE_REFERENCE_TYPE (ntype
) = (struct type
*) 0;
660 /* Chain the new qualified type to the old type. */
661 TYPE_CHAIN (ntype
) = TYPE_CHAIN (type
);
662 TYPE_CHAIN (type
) = ntype
;
664 /* Now set the instance flags and return the new type. */
665 ntype
->set_instance_flags (new_flags
);
667 /* Set length of new type to that of the original type. */
668 TYPE_LENGTH (ntype
) = TYPE_LENGTH (type
);
673 /* Make an address-space-delimited variant of a type -- a type that
674 is identical to the one supplied except that it has an address
675 space attribute attached to it (such as "code" or "data").
677 The space attributes "code" and "data" are for Harvard
678 architectures. The address space attributes are for architectures
679 which have alternately sized pointers or pointers with alternate
683 make_type_with_address_space (struct type
*type
,
684 type_instance_flags space_flag
)
686 type_instance_flags new_flags
= ((type
->instance_flags ()
687 & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
688 | TYPE_INSTANCE_FLAG_DATA_SPACE
689 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
))
692 return make_qualified_type (type
, new_flags
, NULL
);
695 /* Make a "c-v" variant of a type -- a type that is identical to the
696 one supplied except that it may have const or volatile attributes
697 CNST is a flag for setting the const attribute
698 VOLTL is a flag for setting the volatile attribute
699 TYPE is the base type whose variant we are creating.
701 If TYPEPTR and *TYPEPTR are non-zero, then *TYPEPTR points to
702 storage to hold the new qualified type; *TYPEPTR and TYPE must be
703 in the same objfile. Otherwise, allocate fresh memory for the new
704 type whereever TYPE lives. If TYPEPTR is non-zero, set it to the
705 new type we construct. */
708 make_cv_type (int cnst
, int voltl
,
710 struct type
**typeptr
)
712 struct type
*ntype
; /* New type */
714 type_instance_flags new_flags
= (type
->instance_flags ()
715 & ~(TYPE_INSTANCE_FLAG_CONST
716 | TYPE_INSTANCE_FLAG_VOLATILE
));
719 new_flags
|= TYPE_INSTANCE_FLAG_CONST
;
722 new_flags
|= TYPE_INSTANCE_FLAG_VOLATILE
;
724 if (typeptr
&& *typeptr
!= NULL
)
726 /* TYPE and *TYPEPTR must be in the same objfile. We can't have
727 a C-V variant chain that threads across objfiles: if one
728 objfile gets freed, then the other has a broken C-V chain.
730 This code used to try to copy over the main type from TYPE to
731 *TYPEPTR if they were in different objfiles, but that's
732 wrong, too: TYPE may have a field list or member function
733 lists, which refer to types of their own, etc. etc. The
734 whole shebang would need to be copied over recursively; you
735 can't have inter-objfile pointers. The only thing to do is
736 to leave stub types as stub types, and look them up afresh by
737 name each time you encounter them. */
738 gdb_assert ((*typeptr
)->objfile_owner () == type
->objfile_owner ());
741 ntype
= make_qualified_type (type
, new_flags
,
742 typeptr
? *typeptr
: NULL
);
750 /* Make a 'restrict'-qualified version of TYPE. */
753 make_restrict_type (struct type
*type
)
755 return make_qualified_type (type
,
756 (type
->instance_flags ()
757 | TYPE_INSTANCE_FLAG_RESTRICT
),
761 /* Make a type without const, volatile, or restrict. */
764 make_unqualified_type (struct type
*type
)
766 return make_qualified_type (type
,
767 (type
->instance_flags ()
768 & ~(TYPE_INSTANCE_FLAG_CONST
769 | TYPE_INSTANCE_FLAG_VOLATILE
770 | TYPE_INSTANCE_FLAG_RESTRICT
)),
774 /* Make a '_Atomic'-qualified version of TYPE. */
777 make_atomic_type (struct type
*type
)
779 return make_qualified_type (type
,
780 (type
->instance_flags ()
781 | TYPE_INSTANCE_FLAG_ATOMIC
),
785 /* Replace the contents of ntype with the type *type. This changes the
786 contents, rather than the pointer for TYPE_MAIN_TYPE (ntype); thus
787 the changes are propogated to all types in the TYPE_CHAIN.
789 In order to build recursive types, it's inevitable that we'll need
790 to update types in place --- but this sort of indiscriminate
791 smashing is ugly, and needs to be replaced with something more
792 controlled. TYPE_MAIN_TYPE is a step in this direction; it's not
793 clear if more steps are needed. */
796 replace_type (struct type
*ntype
, struct type
*type
)
800 /* These two types had better be in the same objfile. Otherwise,
801 the assignment of one type's main type structure to the other
802 will produce a type with references to objects (names; field
803 lists; etc.) allocated on an objfile other than its own. */
804 gdb_assert (ntype
->objfile_owner () == type
->objfile_owner ());
806 *TYPE_MAIN_TYPE (ntype
) = *TYPE_MAIN_TYPE (type
);
808 /* The type length is not a part of the main type. Update it for
809 each type on the variant chain. */
813 /* Assert that this element of the chain has no address-class bits
814 set in its flags. Such type variants might have type lengths
815 which are supposed to be different from the non-address-class
816 variants. This assertion shouldn't ever be triggered because
817 symbol readers which do construct address-class variants don't
818 call replace_type(). */
819 gdb_assert (TYPE_ADDRESS_CLASS_ALL (chain
) == 0);
821 TYPE_LENGTH (chain
) = TYPE_LENGTH (type
);
822 chain
= TYPE_CHAIN (chain
);
824 while (ntype
!= chain
);
826 /* Assert that the two types have equivalent instance qualifiers.
827 This should be true for at least all of our debug readers. */
828 gdb_assert (ntype
->instance_flags () == type
->instance_flags ());
831 /* Implement direct support for MEMBER_TYPE in GNU C++.
832 May need to construct such a type if this is the first use.
833 The TYPE is the type of the member. The DOMAIN is the type
834 of the aggregate that the member belongs to. */
837 lookup_memberptr_type (struct type
*type
, struct type
*domain
)
841 mtype
= alloc_type_copy (type
);
842 smash_to_memberptr_type (mtype
, domain
, type
);
846 /* Return a pointer-to-method type, for a method of type TO_TYPE. */
849 lookup_methodptr_type (struct type
*to_type
)
853 mtype
= alloc_type_copy (to_type
);
854 smash_to_methodptr_type (mtype
, to_type
);
858 /* Allocate a stub method whose return type is TYPE. This apparently
859 happens for speed of symbol reading, since parsing out the
860 arguments to the method is cpu-intensive, the way we are doing it.
861 So, we will fill in arguments later. This always returns a fresh
865 allocate_stub_method (struct type
*type
)
869 mtype
= alloc_type_copy (type
);
870 mtype
->set_code (TYPE_CODE_METHOD
);
871 TYPE_LENGTH (mtype
) = 1;
872 mtype
->set_is_stub (true);
873 TYPE_TARGET_TYPE (mtype
) = type
;
874 /* TYPE_SELF_TYPE (mtype) = unknown yet */
878 /* See gdbtypes.h. */
881 operator== (const dynamic_prop
&l
, const dynamic_prop
&r
)
883 if (l
.kind () != r
.kind ())
891 return l
.const_val () == r
.const_val ();
892 case PROP_ADDR_OFFSET
:
895 return l
.baton () == r
.baton ();
896 case PROP_VARIANT_PARTS
:
897 return l
.variant_parts () == r
.variant_parts ();
899 return l
.original_type () == r
.original_type ();
902 gdb_assert_not_reached ("unhandled dynamic_prop kind");
905 /* See gdbtypes.h. */
908 operator== (const range_bounds
&l
, const range_bounds
&r
)
910 #define FIELD_EQ(FIELD) (l.FIELD == r.FIELD)
912 return (FIELD_EQ (low
)
914 && FIELD_EQ (flag_upper_bound_is_count
)
915 && FIELD_EQ (flag_bound_evaluated
)
921 /* Create a range type with a dynamic range from LOW_BOUND to
922 HIGH_BOUND, inclusive. See create_range_type for further details. */
925 create_range_type (struct type
*result_type
, struct type
*index_type
,
926 const struct dynamic_prop
*low_bound
,
927 const struct dynamic_prop
*high_bound
,
930 /* The INDEX_TYPE should be a type capable of holding the upper and lower
931 bounds, as such a zero sized, or void type makes no sense. */
932 gdb_assert (index_type
->code () != TYPE_CODE_VOID
);
933 gdb_assert (TYPE_LENGTH (index_type
) > 0);
935 if (result_type
== NULL
)
936 result_type
= alloc_type_copy (index_type
);
937 result_type
->set_code (TYPE_CODE_RANGE
);
938 TYPE_TARGET_TYPE (result_type
) = index_type
;
939 if (index_type
->is_stub ())
940 result_type
->set_target_is_stub (true);
942 TYPE_LENGTH (result_type
) = TYPE_LENGTH (check_typedef (index_type
));
945 = (struct range_bounds
*) TYPE_ZALLOC (result_type
, sizeof (range_bounds
));
946 bounds
->low
= *low_bound
;
947 bounds
->high
= *high_bound
;
949 bounds
->stride
.set_const_val (0);
951 result_type
->set_bounds (bounds
);
953 if (index_type
->code () == TYPE_CODE_FIXED_POINT
)
954 result_type
->set_is_unsigned (index_type
->is_unsigned ());
955 /* Note that the signed-ness of a range type can't simply be copied
956 from the underlying type. Consider a case where the underlying
957 type is 'int', but the range type can hold 0..65535, and where
958 the range is further specified to fit into 16 bits. In this
959 case, if we copy the underlying type's sign, then reading some
960 range values will cause an unwanted sign extension. So, we have
961 some heuristics here instead. */
962 else if (low_bound
->kind () == PROP_CONST
&& low_bound
->const_val () >= 0)
963 result_type
->set_is_unsigned (true);
964 /* Ada allows the declaration of range types whose upper bound is
965 less than the lower bound, so checking the lower bound is not
966 enough. Make sure we do not mark a range type whose upper bound
967 is negative as unsigned. */
968 if (high_bound
->kind () == PROP_CONST
&& high_bound
->const_val () < 0)
969 result_type
->set_is_unsigned (false);
971 result_type
->set_endianity_is_not_default
972 (index_type
->endianity_is_not_default ());
977 /* See gdbtypes.h. */
980 create_range_type_with_stride (struct type
*result_type
,
981 struct type
*index_type
,
982 const struct dynamic_prop
*low_bound
,
983 const struct dynamic_prop
*high_bound
,
985 const struct dynamic_prop
*stride
,
988 result_type
= create_range_type (result_type
, index_type
, low_bound
,
991 gdb_assert (stride
!= nullptr);
992 result_type
->bounds ()->stride
= *stride
;
993 result_type
->bounds ()->flag_is_byte_stride
= byte_stride_p
;
1000 /* Create a range type using either a blank type supplied in
1001 RESULT_TYPE, or creating a new type, inheriting the objfile from
1004 Indices will be of type INDEX_TYPE, and will range from LOW_BOUND
1005 to HIGH_BOUND, inclusive.
1007 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1008 sure it is TYPE_CODE_UNDEF before we bash it into a range type? */
1011 create_static_range_type (struct type
*result_type
, struct type
*index_type
,
1012 LONGEST low_bound
, LONGEST high_bound
)
1014 struct dynamic_prop low
, high
;
1016 low
.set_const_val (low_bound
);
1017 high
.set_const_val (high_bound
);
1019 result_type
= create_range_type (result_type
, index_type
, &low
, &high
, 0);
1024 /* Predicate tests whether BOUNDS are static. Returns 1 if all bounds values
1025 are static, otherwise returns 0. */
1028 has_static_range (const struct range_bounds
*bounds
)
1030 /* If the range doesn't have a defined stride then its stride field will
1031 be initialized to the constant 0. */
1032 return (bounds
->low
.kind () == PROP_CONST
1033 && bounds
->high
.kind () == PROP_CONST
1034 && bounds
->stride
.kind () == PROP_CONST
);
1037 /* See gdbtypes.h. */
1039 gdb::optional
<LONGEST
>
1040 get_discrete_low_bound (struct type
*type
)
1042 type
= check_typedef (type
);
1043 switch (type
->code ())
1045 case TYPE_CODE_RANGE
:
1047 /* This function only works for ranges with a constant low bound. */
1048 if (type
->bounds ()->low
.kind () != PROP_CONST
)
1051 LONGEST low
= type
->bounds ()->low
.const_val ();
1053 if (TYPE_TARGET_TYPE (type
)->code () == TYPE_CODE_ENUM
)
1055 gdb::optional
<LONGEST
> low_pos
1056 = discrete_position (TYPE_TARGET_TYPE (type
), low
);
1058 if (low_pos
.has_value ())
1065 case TYPE_CODE_ENUM
:
1067 if (type
->num_fields () > 0)
1069 /* The enums may not be sorted by value, so search all
1071 LONGEST low
= type
->field (0).loc_enumval ();
1073 for (int i
= 0; i
< type
->num_fields (); i
++)
1075 if (type
->field (i
).loc_enumval () < low
)
1076 low
= type
->field (i
).loc_enumval ();
1079 /* Set unsigned indicator if warranted. */
1081 type
->set_is_unsigned (true);
1089 case TYPE_CODE_BOOL
:
1093 if (TYPE_LENGTH (type
) > sizeof (LONGEST
)) /* Too big */
1096 if (!type
->is_unsigned ())
1097 return -(1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1));
1100 case TYPE_CODE_CHAR
:
1108 /* See gdbtypes.h. */
1110 gdb::optional
<LONGEST
>
1111 get_discrete_high_bound (struct type
*type
)
1113 type
= check_typedef (type
);
1114 switch (type
->code ())
1116 case TYPE_CODE_RANGE
:
1118 /* This function only works for ranges with a constant high bound. */
1119 if (type
->bounds ()->high
.kind () != PROP_CONST
)
1122 LONGEST high
= type
->bounds ()->high
.const_val ();
1124 if (TYPE_TARGET_TYPE (type
)->code () == TYPE_CODE_ENUM
)
1126 gdb::optional
<LONGEST
> high_pos
1127 = discrete_position (TYPE_TARGET_TYPE (type
), high
);
1129 if (high_pos
.has_value ())
1136 case TYPE_CODE_ENUM
:
1138 if (type
->num_fields () > 0)
1140 /* The enums may not be sorted by value, so search all
1142 LONGEST high
= type
->field (0).loc_enumval ();
1144 for (int i
= 0; i
< type
->num_fields (); i
++)
1146 if (type
->field (i
).loc_enumval () > high
)
1147 high
= type
->field (i
).loc_enumval ();
1156 case TYPE_CODE_BOOL
:
1160 if (TYPE_LENGTH (type
) > sizeof (LONGEST
)) /* Too big */
1163 if (!type
->is_unsigned ())
1165 LONGEST low
= -(1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1));
1170 case TYPE_CODE_CHAR
:
1172 /* This round-about calculation is to avoid shifting by
1173 TYPE_LENGTH (type) * TARGET_CHAR_BIT, which will not work
1174 if TYPE_LENGTH (type) == sizeof (LONGEST). */
1175 LONGEST high
= 1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1);
1176 return (high
- 1) | high
;
1184 /* See gdbtypes.h. */
1187 get_discrete_bounds (struct type
*type
, LONGEST
*lowp
, LONGEST
*highp
)
1189 gdb::optional
<LONGEST
> low
= get_discrete_low_bound (type
);
1190 if (!low
.has_value ())
1193 gdb::optional
<LONGEST
> high
= get_discrete_high_bound (type
);
1194 if (!high
.has_value ())
1203 /* See gdbtypes.h */
1206 get_array_bounds (struct type
*type
, LONGEST
*low_bound
, LONGEST
*high_bound
)
1208 struct type
*index
= type
->index_type ();
1215 if (!get_discrete_bounds (index
, &low
, &high
))
1227 /* Assuming that TYPE is a discrete type and VAL is a valid integer
1228 representation of a value of this type, save the corresponding
1229 position number in POS.
1231 Its differs from VAL only in the case of enumeration types. In
1232 this case, the position number of the value of the first listed
1233 enumeration literal is zero; the position number of the value of
1234 each subsequent enumeration literal is one more than that of its
1235 predecessor in the list.
1237 Return 1 if the operation was successful. Return zero otherwise,
1238 in which case the value of POS is unmodified.
1241 gdb::optional
<LONGEST
>
1242 discrete_position (struct type
*type
, LONGEST val
)
1244 if (type
->code () == TYPE_CODE_RANGE
)
1245 type
= TYPE_TARGET_TYPE (type
);
1247 if (type
->code () == TYPE_CODE_ENUM
)
1251 for (i
= 0; i
< type
->num_fields (); i
+= 1)
1253 if (val
== type
->field (i
).loc_enumval ())
1257 /* Invalid enumeration value. */
1264 /* If the array TYPE has static bounds calculate and update its
1265 size, then return true. Otherwise return false and leave TYPE
1269 update_static_array_size (struct type
*type
)
1271 gdb_assert (type
->code () == TYPE_CODE_ARRAY
);
1273 struct type
*range_type
= type
->index_type ();
1275 if (type
->dyn_prop (DYN_PROP_BYTE_STRIDE
) == nullptr
1276 && has_static_range (range_type
->bounds ())
1277 && (!type_not_associated (type
)
1278 && !type_not_allocated (type
)))
1280 LONGEST low_bound
, high_bound
;
1282 struct type
*element_type
;
1284 stride
= type
->bit_stride ();
1286 if (!get_discrete_bounds (range_type
, &low_bound
, &high_bound
))
1287 low_bound
= high_bound
= 0;
1289 element_type
= check_typedef (TYPE_TARGET_TYPE (type
));
1290 /* Be careful when setting the array length. Ada arrays can be
1291 empty arrays with the high_bound being smaller than the low_bound.
1292 In such cases, the array length should be zero. */
1293 if (high_bound
< low_bound
)
1294 TYPE_LENGTH (type
) = 0;
1295 else if (stride
!= 0)
1297 /* Ensure that the type length is always positive, even in the
1298 case where (for example in Fortran) we have a negative
1299 stride. It is possible to have a single element array with a
1300 negative stride in Fortran (this doesn't mean anything
1301 special, it's still just a single element array) so do
1302 consider that case when touching this code. */
1303 LONGEST element_count
= std::abs (high_bound
- low_bound
+ 1);
1305 = ((std::abs (stride
) * element_count
) + 7) / 8;
1308 TYPE_LENGTH (type
) =
1309 TYPE_LENGTH (element_type
) * (high_bound
- low_bound
+ 1);
1311 /* If this array's element is itself an array with a bit stride,
1312 then we want to update this array's bit stride to reflect the
1313 size of the sub-array. Otherwise, we'll end up using the
1314 wrong size when trying to find elements of the outer
1316 if (element_type
->code () == TYPE_CODE_ARRAY
1317 && TYPE_LENGTH (element_type
) != 0
1318 && TYPE_FIELD_BITSIZE (element_type
, 0) != 0
1319 && get_array_bounds (element_type
, &low_bound
, &high_bound
)
1320 && high_bound
>= low_bound
)
1321 TYPE_FIELD_BITSIZE (type
, 0)
1322 = ((high_bound
- low_bound
+ 1)
1323 * TYPE_FIELD_BITSIZE (element_type
, 0));
1331 /* Create an array type using either a blank type supplied in
1332 RESULT_TYPE, or creating a new type, inheriting the objfile from
1335 Elements will be of type ELEMENT_TYPE, the indices will be of type
1338 BYTE_STRIDE_PROP, when not NULL, provides the array's byte stride.
1339 This byte stride property is added to the resulting array type
1340 as a DYN_PROP_BYTE_STRIDE. As a consequence, the BYTE_STRIDE_PROP
1341 argument can only be used to create types that are objfile-owned
1342 (see add_dyn_prop), meaning that either this function must be called
1343 with an objfile-owned RESULT_TYPE, or an objfile-owned RANGE_TYPE.
1345 BIT_STRIDE is taken into account only when BYTE_STRIDE_PROP is NULL.
1346 If BIT_STRIDE is not zero, build a packed array type whose element
1347 size is BIT_STRIDE. Otherwise, ignore this parameter.
1349 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1350 sure it is TYPE_CODE_UNDEF before we bash it into an array
1354 create_array_type_with_stride (struct type
*result_type
,
1355 struct type
*element_type
,
1356 struct type
*range_type
,
1357 struct dynamic_prop
*byte_stride_prop
,
1358 unsigned int bit_stride
)
1360 if (byte_stride_prop
!= NULL
1361 && byte_stride_prop
->kind () == PROP_CONST
)
1363 /* The byte stride is actually not dynamic. Pretend we were
1364 called with bit_stride set instead of byte_stride_prop.
1365 This will give us the same result type, while avoiding
1366 the need to handle this as a special case. */
1367 bit_stride
= byte_stride_prop
->const_val () * 8;
1368 byte_stride_prop
= NULL
;
1371 if (result_type
== NULL
)
1372 result_type
= alloc_type_copy (range_type
);
1374 result_type
->set_code (TYPE_CODE_ARRAY
);
1375 TYPE_TARGET_TYPE (result_type
) = element_type
;
1377 result_type
->set_num_fields (1);
1378 result_type
->set_fields
1379 ((struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
)));
1380 result_type
->set_index_type (range_type
);
1381 if (byte_stride_prop
!= NULL
)
1382 result_type
->add_dyn_prop (DYN_PROP_BYTE_STRIDE
, *byte_stride_prop
);
1383 else if (bit_stride
> 0)
1384 TYPE_FIELD_BITSIZE (result_type
, 0) = bit_stride
;
1386 if (!update_static_array_size (result_type
))
1388 /* This type is dynamic and its length needs to be computed
1389 on demand. In the meantime, avoid leaving the TYPE_LENGTH
1390 undefined by setting it to zero. Although we are not expected
1391 to trust TYPE_LENGTH in this case, setting the size to zero
1392 allows us to avoid allocating objects of random sizes in case
1393 we accidently do. */
1394 TYPE_LENGTH (result_type
) = 0;
1397 /* TYPE_TARGET_STUB will take care of zero length arrays. */
1398 if (TYPE_LENGTH (result_type
) == 0)
1399 result_type
->set_target_is_stub (true);
1404 /* Same as create_array_type_with_stride but with no bit_stride
1405 (BIT_STRIDE = 0), thus building an unpacked array. */
1408 create_array_type (struct type
*result_type
,
1409 struct type
*element_type
,
1410 struct type
*range_type
)
1412 return create_array_type_with_stride (result_type
, element_type
,
1413 range_type
, NULL
, 0);
1417 lookup_array_range_type (struct type
*element_type
,
1418 LONGEST low_bound
, LONGEST high_bound
)
1420 struct type
*index_type
;
1421 struct type
*range_type
;
1423 if (element_type
->is_objfile_owned ())
1424 index_type
= objfile_type (element_type
->objfile_owner ())->builtin_int
;
1426 index_type
= builtin_type (element_type
->arch_owner ())->builtin_int
;
1428 range_type
= create_static_range_type (NULL
, index_type
,
1429 low_bound
, high_bound
);
1431 return create_array_type (NULL
, element_type
, range_type
);
1434 /* Create a string type using either a blank type supplied in
1435 RESULT_TYPE, or creating a new type. String types are similar
1436 enough to array of char types that we can use create_array_type to
1437 build the basic type and then bash it into a string type.
1439 For fixed length strings, the range type contains 0 as the lower
1440 bound and the length of the string minus one as the upper bound.
1442 FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
1443 sure it is TYPE_CODE_UNDEF before we bash it into a string
1447 create_string_type (struct type
*result_type
,
1448 struct type
*string_char_type
,
1449 struct type
*range_type
)
1451 result_type
= create_array_type (result_type
,
1454 result_type
->set_code (TYPE_CODE_STRING
);
1459 lookup_string_range_type (struct type
*string_char_type
,
1460 LONGEST low_bound
, LONGEST high_bound
)
1462 struct type
*result_type
;
1464 result_type
= lookup_array_range_type (string_char_type
,
1465 low_bound
, high_bound
);
1466 result_type
->set_code (TYPE_CODE_STRING
);
1471 create_set_type (struct type
*result_type
, struct type
*domain_type
)
1473 if (result_type
== NULL
)
1474 result_type
= alloc_type_copy (domain_type
);
1476 result_type
->set_code (TYPE_CODE_SET
);
1477 result_type
->set_num_fields (1);
1478 result_type
->set_fields
1479 ((struct field
*) TYPE_ZALLOC (result_type
, sizeof (struct field
)));
1481 if (!domain_type
->is_stub ())
1483 LONGEST low_bound
, high_bound
, bit_length
;
1485 if (!get_discrete_bounds (domain_type
, &low_bound
, &high_bound
))
1486 low_bound
= high_bound
= 0;
1488 bit_length
= high_bound
- low_bound
+ 1;
1489 TYPE_LENGTH (result_type
)
1490 = (bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
1492 result_type
->set_is_unsigned (true);
1494 result_type
->field (0).set_type (domain_type
);
1499 /* Convert ARRAY_TYPE to a vector type. This may modify ARRAY_TYPE
1500 and any array types nested inside it. */
1503 make_vector_type (struct type
*array_type
)
1505 struct type
*inner_array
, *elt_type
;
1507 /* Find the innermost array type, in case the array is
1508 multi-dimensional. */
1509 inner_array
= array_type
;
1510 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
1511 inner_array
= TYPE_TARGET_TYPE (inner_array
);
1513 elt_type
= TYPE_TARGET_TYPE (inner_array
);
1514 if (elt_type
->code () == TYPE_CODE_INT
)
1516 type_instance_flags flags
1517 = elt_type
->instance_flags () | TYPE_INSTANCE_FLAG_NOTTEXT
;
1518 elt_type
= make_qualified_type (elt_type
, flags
, NULL
);
1519 TYPE_TARGET_TYPE (inner_array
) = elt_type
;
1522 array_type
->set_is_vector (true);
1526 init_vector_type (struct type
*elt_type
, int n
)
1528 struct type
*array_type
;
1530 array_type
= lookup_array_range_type (elt_type
, 0, n
- 1);
1531 make_vector_type (array_type
);
1535 /* Internal routine called by TYPE_SELF_TYPE to return the type that TYPE
1536 belongs to. In c++ this is the class of "this", but TYPE_THIS_TYPE is too
1537 confusing. "self" is a common enough replacement for "this".
1538 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1539 TYPE_CODE_METHOD. */
1542 internal_type_self_type (struct type
*type
)
1544 switch (type
->code ())
1546 case TYPE_CODE_METHODPTR
:
1547 case TYPE_CODE_MEMBERPTR
:
1548 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1550 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1551 return TYPE_MAIN_TYPE (type
)->type_specific
.self_type
;
1552 case TYPE_CODE_METHOD
:
1553 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1555 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1556 return TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
;
1558 gdb_assert_not_reached ("bad type");
1562 /* Set the type of the class that TYPE belongs to.
1563 In c++ this is the class of "this".
1564 TYPE must be one of TYPE_CODE_METHODPTR, TYPE_CODE_MEMBERPTR, or
1565 TYPE_CODE_METHOD. */
1568 set_type_self_type (struct type
*type
, struct type
*self_type
)
1570 switch (type
->code ())
1572 case TYPE_CODE_METHODPTR
:
1573 case TYPE_CODE_MEMBERPTR
:
1574 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1575 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_SELF_TYPE
;
1576 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_SELF_TYPE
);
1577 TYPE_MAIN_TYPE (type
)->type_specific
.self_type
= self_type
;
1579 case TYPE_CODE_METHOD
:
1580 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_NONE
)
1581 INIT_FUNC_SPECIFIC (type
);
1582 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FUNC
);
1583 TYPE_MAIN_TYPE (type
)->type_specific
.func_stuff
->self_type
= self_type
;
1586 gdb_assert_not_reached ("bad type");
1590 /* Smash TYPE to be a type of pointers to members of SELF_TYPE with type
1591 TO_TYPE. A member pointer is a wierd thing -- it amounts to a
1592 typed offset into a struct, e.g. "an int at offset 8". A MEMBER
1593 TYPE doesn't include the offset (that's the value of the MEMBER
1594 itself), but does include the structure type into which it points
1597 When "smashing" the type, we preserve the objfile that the old type
1598 pointed to, since we aren't changing where the type is actually
1602 smash_to_memberptr_type (struct type
*type
, struct type
*self_type
,
1603 struct type
*to_type
)
1606 type
->set_code (TYPE_CODE_MEMBERPTR
);
1607 TYPE_TARGET_TYPE (type
) = to_type
;
1608 set_type_self_type (type
, self_type
);
1609 /* Assume that a data member pointer is the same size as a normal
1611 TYPE_LENGTH (type
) = gdbarch_ptr_bit (to_type
->arch ()) / TARGET_CHAR_BIT
;
1614 /* Smash TYPE to be a type of pointer to methods type TO_TYPE.
1616 When "smashing" the type, we preserve the objfile that the old type
1617 pointed to, since we aren't changing where the type is actually
1621 smash_to_methodptr_type (struct type
*type
, struct type
*to_type
)
1624 type
->set_code (TYPE_CODE_METHODPTR
);
1625 TYPE_TARGET_TYPE (type
) = to_type
;
1626 set_type_self_type (type
, TYPE_SELF_TYPE (to_type
));
1627 TYPE_LENGTH (type
) = cplus_method_ptr_size (to_type
);
1630 /* Smash TYPE to be a type of method of SELF_TYPE with type TO_TYPE.
1631 METHOD just means `function that gets an extra "this" argument'.
1633 When "smashing" the type, we preserve the objfile that the old type
1634 pointed to, since we aren't changing where the type is actually
1638 smash_to_method_type (struct type
*type
, struct type
*self_type
,
1639 struct type
*to_type
, struct field
*args
,
1640 int nargs
, int varargs
)
1643 type
->set_code (TYPE_CODE_METHOD
);
1644 TYPE_TARGET_TYPE (type
) = to_type
;
1645 set_type_self_type (type
, self_type
);
1646 type
->set_fields (args
);
1647 type
->set_num_fields (nargs
);
1649 type
->set_has_varargs (true);
1650 TYPE_LENGTH (type
) = 1; /* In practice, this is never needed. */
1653 /* A wrapper of TYPE_NAME which calls error if the type is anonymous.
1654 Since GCC PR debug/47510 DWARF provides associated information to detect the
1655 anonymous class linkage name from its typedef.
1657 Parameter TYPE should not yet have CHECK_TYPEDEF applied, this function will
1661 type_name_or_error (struct type
*type
)
1663 struct type
*saved_type
= type
;
1665 struct objfile
*objfile
;
1667 type
= check_typedef (type
);
1669 name
= type
->name ();
1673 name
= saved_type
->name ();
1674 objfile
= saved_type
->objfile_owner ();
1675 error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
1676 name
? name
: "<anonymous>",
1677 objfile
? objfile_name (objfile
) : "<arch>");
1680 /* Lookup a typedef or primitive type named NAME, visible in lexical
1681 block BLOCK. If NOERR is nonzero, return zero if NAME is not
1682 suitably defined. */
1685 lookup_typename (const struct language_defn
*language
,
1687 const struct block
*block
, int noerr
)
1691 sym
= lookup_symbol_in_language (name
, block
, VAR_DOMAIN
,
1692 language
->la_language
, NULL
).symbol
;
1693 if (sym
!= NULL
&& sym
->aclass () == LOC_TYPEDEF
)
1694 return SYMBOL_TYPE (sym
);
1698 error (_("No type named %s."), name
);
1702 lookup_unsigned_typename (const struct language_defn
*language
,
1705 char *uns
= (char *) alloca (strlen (name
) + 10);
1707 strcpy (uns
, "unsigned ");
1708 strcpy (uns
+ 9, name
);
1709 return lookup_typename (language
, uns
, NULL
, 0);
1713 lookup_signed_typename (const struct language_defn
*language
, const char *name
)
1716 char *uns
= (char *) alloca (strlen (name
) + 8);
1718 strcpy (uns
, "signed ");
1719 strcpy (uns
+ 7, name
);
1720 t
= lookup_typename (language
, uns
, NULL
, 1);
1721 /* If we don't find "signed FOO" just try again with plain "FOO". */
1724 return lookup_typename (language
, name
, NULL
, 0);
1727 /* Lookup a structure type named "struct NAME",
1728 visible in lexical block BLOCK. */
1731 lookup_struct (const char *name
, const struct block
*block
)
1735 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1739 error (_("No struct type named %s."), name
);
1741 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_STRUCT
)
1743 error (_("This context has class, union or enum %s, not a struct."),
1746 return (SYMBOL_TYPE (sym
));
1749 /* Lookup a union type named "union NAME",
1750 visible in lexical block BLOCK. */
1753 lookup_union (const char *name
, const struct block
*block
)
1758 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1761 error (_("No union type named %s."), name
);
1763 t
= SYMBOL_TYPE (sym
);
1765 if (t
->code () == TYPE_CODE_UNION
)
1768 /* If we get here, it's not a union. */
1769 error (_("This context has class, struct or enum %s, not a union."),
1773 /* Lookup an enum type named "enum NAME",
1774 visible in lexical block BLOCK. */
1777 lookup_enum (const char *name
, const struct block
*block
)
1781 sym
= lookup_symbol (name
, block
, STRUCT_DOMAIN
, 0).symbol
;
1784 error (_("No enum type named %s."), name
);
1786 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_ENUM
)
1788 error (_("This context has class, struct or union %s, not an enum."),
1791 return (SYMBOL_TYPE (sym
));
1794 /* Lookup a template type named "template NAME<TYPE>",
1795 visible in lexical block BLOCK. */
1798 lookup_template_type (const char *name
, struct type
*type
,
1799 const struct block
*block
)
1802 char *nam
= (char *)
1803 alloca (strlen (name
) + strlen (type
->name ()) + 4);
1807 strcat (nam
, type
->name ());
1808 strcat (nam
, " >"); /* FIXME, extra space still introduced in gcc? */
1810 sym
= lookup_symbol (nam
, block
, VAR_DOMAIN
, 0).symbol
;
1814 error (_("No template type named %s."), name
);
1816 if (SYMBOL_TYPE (sym
)->code () != TYPE_CODE_STRUCT
)
1818 error (_("This context has class, union or enum %s, not a struct."),
1821 return (SYMBOL_TYPE (sym
));
1824 /* See gdbtypes.h. */
1827 lookup_struct_elt (struct type
*type
, const char *name
, int noerr
)
1833 type
= check_typedef (type
);
1834 if (type
->code () != TYPE_CODE_PTR
1835 && type
->code () != TYPE_CODE_REF
)
1837 type
= TYPE_TARGET_TYPE (type
);
1840 if (type
->code () != TYPE_CODE_STRUCT
1841 && type
->code () != TYPE_CODE_UNION
)
1843 std::string type_name
= type_to_string (type
);
1844 error (_("Type %s is not a structure or union type."),
1845 type_name
.c_str ());
1848 for (i
= type
->num_fields () - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1850 const char *t_field_name
= type
->field (i
).name ();
1852 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1854 return {&type
->field (i
), type
->field (i
).loc_bitpos ()};
1856 else if (!t_field_name
|| *t_field_name
== '\0')
1859 = lookup_struct_elt (type
->field (i
).type (), name
, 1);
1860 if (elt
.field
!= NULL
)
1862 elt
.offset
+= type
->field (i
).loc_bitpos ();
1868 /* OK, it's not in this class. Recursively check the baseclasses. */
1869 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1871 struct_elt elt
= lookup_struct_elt (TYPE_BASECLASS (type
, i
), name
, 1);
1872 if (elt
.field
!= NULL
)
1877 return {nullptr, 0};
1879 std::string type_name
= type_to_string (type
);
1880 error (_("Type %s has no component named %s."), type_name
.c_str (), name
);
1883 /* See gdbtypes.h. */
1886 lookup_struct_elt_type (struct type
*type
, const char *name
, int noerr
)
1888 struct_elt elt
= lookup_struct_elt (type
, name
, noerr
);
1889 if (elt
.field
!= NULL
)
1890 return elt
.field
->type ();
1895 /* Return the largest number representable by unsigned integer type TYPE. */
1898 get_unsigned_type_max (struct type
*type
)
1902 type
= check_typedef (type
);
1903 gdb_assert (type
->code () == TYPE_CODE_INT
&& type
->is_unsigned ());
1904 gdb_assert (TYPE_LENGTH (type
) <= sizeof (ULONGEST
));
1906 /* Written this way to avoid overflow. */
1907 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1908 return ((((ULONGEST
) 1 << (n
- 1)) - 1) << 1) | 1;
1911 /* Store in *MIN, *MAX the smallest and largest numbers representable by
1912 signed integer type TYPE. */
1915 get_signed_type_minmax (struct type
*type
, LONGEST
*min
, LONGEST
*max
)
1919 type
= check_typedef (type
);
1920 gdb_assert (type
->code () == TYPE_CODE_INT
&& !type
->is_unsigned ());
1921 gdb_assert (TYPE_LENGTH (type
) <= sizeof (LONGEST
));
1923 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1924 *min
= -((ULONGEST
) 1 << (n
- 1));
1925 *max
= ((ULONGEST
) 1 << (n
- 1)) - 1;
1928 /* Return the largest value representable by pointer type TYPE. */
1931 get_pointer_type_max (struct type
*type
)
1935 type
= check_typedef (type
);
1936 gdb_assert (type
->code () == TYPE_CODE_PTR
);
1937 gdb_assert (TYPE_LENGTH (type
) <= sizeof (CORE_ADDR
));
1939 n
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
1940 return ((((CORE_ADDR
) 1 << (n
- 1)) - 1) << 1) | 1;
1943 /* Internal routine called by TYPE_VPTR_FIELDNO to return the value of
1944 cplus_stuff.vptr_fieldno.
1946 cplus_stuff is initialized to cplus_struct_default which does not
1947 set vptr_fieldno to -1 for portability reasons (IWBN to use C99
1948 designated initializers). We cope with that here. */
1951 internal_type_vptr_fieldno (struct type
*type
)
1953 type
= check_typedef (type
);
1954 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1955 || type
->code () == TYPE_CODE_UNION
);
1956 if (!HAVE_CPLUS_STRUCT (type
))
1958 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
;
1961 /* Set the value of cplus_stuff.vptr_fieldno. */
1964 set_type_vptr_fieldno (struct type
*type
, int fieldno
)
1966 type
= check_typedef (type
);
1967 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1968 || type
->code () == TYPE_CODE_UNION
);
1969 if (!HAVE_CPLUS_STRUCT (type
))
1970 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1971 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_fieldno
= fieldno
;
1974 /* Internal routine called by TYPE_VPTR_BASETYPE to return the value of
1975 cplus_stuff.vptr_basetype. */
1978 internal_type_vptr_basetype (struct type
*type
)
1980 type
= check_typedef (type
);
1981 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1982 || type
->code () == TYPE_CODE_UNION
);
1983 gdb_assert (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_CPLUS_STUFF
);
1984 return TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
;
1987 /* Set the value of cplus_stuff.vptr_basetype. */
1990 set_type_vptr_basetype (struct type
*type
, struct type
*basetype
)
1992 type
= check_typedef (type
);
1993 gdb_assert (type
->code () == TYPE_CODE_STRUCT
1994 || type
->code () == TYPE_CODE_UNION
);
1995 if (!HAVE_CPLUS_STRUCT (type
))
1996 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
1997 TYPE_RAW_CPLUS_SPECIFIC (type
)->vptr_basetype
= basetype
;
2000 /* Lookup the vptr basetype/fieldno values for TYPE.
2001 If found store vptr_basetype in *BASETYPEP if non-NULL, and return
2002 vptr_fieldno. Also, if found and basetype is from the same objfile,
2004 If not found, return -1 and ignore BASETYPEP.
2005 Callers should be aware that in some cases (for example,
2006 the type or one of its baseclasses is a stub type and we are
2007 debugging a .o file, or the compiler uses DWARF-2 and is not GCC),
2008 this function will not be able to find the
2009 virtual function table pointer, and vptr_fieldno will remain -1 and
2010 vptr_basetype will remain NULL or incomplete. */
2013 get_vptr_fieldno (struct type
*type
, struct type
**basetypep
)
2015 type
= check_typedef (type
);
2017 if (TYPE_VPTR_FIELDNO (type
) < 0)
2021 /* We must start at zero in case the first (and only) baseclass
2022 is virtual (and hence we cannot share the table pointer). */
2023 for (i
= 0; i
< TYPE_N_BASECLASSES (type
); i
++)
2025 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
2027 struct type
*basetype
;
2029 fieldno
= get_vptr_fieldno (baseclass
, &basetype
);
2032 /* If the type comes from a different objfile we can't cache
2033 it, it may have a different lifetime. PR 2384 */
2034 if (type
->objfile_owner () == basetype
->objfile_owner ())
2036 set_type_vptr_fieldno (type
, fieldno
);
2037 set_type_vptr_basetype (type
, basetype
);
2040 *basetypep
= basetype
;
2051 *basetypep
= TYPE_VPTR_BASETYPE (type
);
2052 return TYPE_VPTR_FIELDNO (type
);
2057 stub_noname_complaint (void)
2059 complaint (_("stub type has NULL name"));
2062 /* Return nonzero if TYPE has a DYN_PROP_BYTE_STRIDE dynamic property
2063 attached to it, and that property has a non-constant value. */
2066 array_type_has_dynamic_stride (struct type
*type
)
2068 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
2070 return (prop
!= NULL
&& prop
->kind () != PROP_CONST
);
2073 /* Worker for is_dynamic_type. */
2076 is_dynamic_type_internal (struct type
*type
, int top_level
)
2078 type
= check_typedef (type
);
2080 /* We only want to recognize references at the outermost level. */
2081 if (top_level
&& type
->code () == TYPE_CODE_REF
)
2082 type
= check_typedef (TYPE_TARGET_TYPE (type
));
2084 /* Types that have a dynamic TYPE_DATA_LOCATION are considered
2085 dynamic, even if the type itself is statically defined.
2086 From a user's point of view, this may appear counter-intuitive;
2087 but it makes sense in this context, because the point is to determine
2088 whether any part of the type needs to be resolved before it can
2090 if (TYPE_DATA_LOCATION (type
) != NULL
2091 && (TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCEXPR
2092 || TYPE_DATA_LOCATION_KIND (type
) == PROP_LOCLIST
))
2095 if (TYPE_ASSOCIATED_PROP (type
))
2098 if (TYPE_ALLOCATED_PROP (type
))
2101 struct dynamic_prop
*prop
= type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
2102 if (prop
!= nullptr && prop
->kind () != PROP_TYPE
)
2105 if (TYPE_HAS_DYNAMIC_LENGTH (type
))
2108 switch (type
->code ())
2110 case TYPE_CODE_RANGE
:
2112 /* A range type is obviously dynamic if it has at least one
2113 dynamic bound. But also consider the range type to be
2114 dynamic when its subtype is dynamic, even if the bounds
2115 of the range type are static. It allows us to assume that
2116 the subtype of a static range type is also static. */
2117 return (!has_static_range (type
->bounds ())
2118 || is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0));
2121 case TYPE_CODE_STRING
:
2122 /* Strings are very much like an array of characters, and can be
2123 treated as one here. */
2124 case TYPE_CODE_ARRAY
:
2126 gdb_assert (type
->num_fields () == 1);
2128 /* The array is dynamic if either the bounds are dynamic... */
2129 if (is_dynamic_type_internal (type
->index_type (), 0))
2131 /* ... or the elements it contains have a dynamic contents... */
2132 if (is_dynamic_type_internal (TYPE_TARGET_TYPE (type
), 0))
2134 /* ... or if it has a dynamic stride... */
2135 if (array_type_has_dynamic_stride (type
))
2140 case TYPE_CODE_STRUCT
:
2141 case TYPE_CODE_UNION
:
2145 bool is_cplus
= HAVE_CPLUS_STRUCT (type
);
2147 for (i
= 0; i
< type
->num_fields (); ++i
)
2149 /* Static fields can be ignored here. */
2150 if (field_is_static (&type
->field (i
)))
2152 /* If the field has dynamic type, then so does TYPE. */
2153 if (is_dynamic_type_internal (type
->field (i
).type (), 0))
2155 /* If the field is at a fixed offset, then it is not
2157 if (type
->field (i
).loc_kind () != FIELD_LOC_KIND_DWARF_BLOCK
)
2159 /* Do not consider C++ virtual base types to be dynamic
2160 due to the field's offset being dynamic; these are
2161 handled via other means. */
2162 if (is_cplus
&& BASETYPE_VIA_VIRTUAL (type
, i
))
2173 /* See gdbtypes.h. */
2176 is_dynamic_type (struct type
*type
)
2178 return is_dynamic_type_internal (type
, 1);
2181 static struct type
*resolve_dynamic_type_internal
2182 (struct type
*type
, struct property_addr_info
*addr_stack
, int top_level
);
2184 /* Given a dynamic range type (dyn_range_type) and a stack of
2185 struct property_addr_info elements, return a static version
2188 When RESOLVE_P is true then the returned static range is created by
2189 actually evaluating any dynamic properties within the range type, while
2190 when RESOLVE_P is false the returned static range has all of the bounds
2191 and stride information set to undefined. The RESOLVE_P set to false
2192 case will be used when evaluating a dynamic array that is not
2193 allocated, or not associated, i.e. the bounds information might not be
2196 static struct type
*
2197 resolve_dynamic_range (struct type
*dyn_range_type
,
2198 struct property_addr_info
*addr_stack
,
2199 bool resolve_p
= true)
2202 struct type
*static_range_type
, *static_target_type
;
2203 struct dynamic_prop low_bound
, high_bound
, stride
;
2205 gdb_assert (dyn_range_type
->code () == TYPE_CODE_RANGE
);
2207 const struct dynamic_prop
*prop
= &dyn_range_type
->bounds ()->low
;
2208 if (resolve_p
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2209 low_bound
.set_const_val (value
);
2211 low_bound
.set_undefined ();
2213 prop
= &dyn_range_type
->bounds ()->high
;
2214 if (resolve_p
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2216 high_bound
.set_const_val (value
);
2218 if (dyn_range_type
->bounds ()->flag_upper_bound_is_count
)
2219 high_bound
.set_const_val
2220 (low_bound
.const_val () + high_bound
.const_val () - 1);
2223 high_bound
.set_undefined ();
2225 bool byte_stride_p
= dyn_range_type
->bounds ()->flag_is_byte_stride
;
2226 prop
= &dyn_range_type
->bounds ()->stride
;
2227 if (resolve_p
&& dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2229 stride
.set_const_val (value
);
2231 /* If we have a bit stride that is not an exact number of bytes then
2232 I really don't think this is going to work with current GDB, the
2233 array indexing code in GDB seems to be pretty heavily tied to byte
2234 offsets right now. Assuming 8 bits in a byte. */
2235 struct gdbarch
*gdbarch
= dyn_range_type
->arch ();
2236 int unit_size
= gdbarch_addressable_memory_unit_size (gdbarch
);
2237 if (!byte_stride_p
&& (value
% (unit_size
* 8)) != 0)
2238 error (_("bit strides that are not a multiple of the byte size "
2239 "are currently not supported"));
2243 stride
.set_undefined ();
2244 byte_stride_p
= true;
2248 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (dyn_range_type
),
2250 LONGEST bias
= dyn_range_type
->bounds ()->bias
;
2251 static_range_type
= create_range_type_with_stride
2252 (copy_type (dyn_range_type
), static_target_type
,
2253 &low_bound
, &high_bound
, bias
, &stride
, byte_stride_p
);
2254 static_range_type
->bounds ()->flag_bound_evaluated
= 1;
2255 return static_range_type
;
2258 /* Resolves dynamic bound values of an array or string type TYPE to static
2259 ones. ADDR_STACK is a stack of struct property_addr_info to be used if
2260 needed during the dynamic resolution.
2262 When RESOLVE_P is true then the dynamic properties of TYPE are
2263 evaluated, otherwise the dynamic properties of TYPE are not evaluated,
2264 instead we assume the array is not allocated/associated yet. */
2266 static struct type
*
2267 resolve_dynamic_array_or_string (struct type
*type
,
2268 struct property_addr_info
*addr_stack
,
2269 bool resolve_p
= true)
2272 struct type
*elt_type
;
2273 struct type
*range_type
;
2274 struct type
*ary_dim
;
2275 struct dynamic_prop
*prop
;
2276 unsigned int bit_stride
= 0;
2278 /* For dynamic type resolution strings can be treated like arrays of
2280 gdb_assert (type
->code () == TYPE_CODE_ARRAY
2281 || type
->code () == TYPE_CODE_STRING
);
2283 type
= copy_type (type
);
2285 /* Resolve the allocated and associated properties before doing anything
2286 else. If an array is not allocated or not associated then (at least
2287 for Fortran) there is no guarantee that the data to define the upper
2288 bound, lower bound, or stride will be correct. If RESOLVE_P is
2289 already false at this point then this is not the first dimension of
2290 the array and a more outer dimension has already marked this array as
2291 not allocated/associated, as such we just ignore this property. This
2292 is fine as GDB only checks the allocated/associated on the outer most
2293 dimension of the array. */
2294 prop
= TYPE_ALLOCATED_PROP (type
);
2295 if (prop
!= NULL
&& resolve_p
2296 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2298 prop
->set_const_val (value
);
2303 prop
= TYPE_ASSOCIATED_PROP (type
);
2304 if (prop
!= NULL
&& resolve_p
2305 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2307 prop
->set_const_val (value
);
2312 range_type
= check_typedef (type
->index_type ());
2313 range_type
= resolve_dynamic_range (range_type
, addr_stack
, resolve_p
);
2315 ary_dim
= check_typedef (TYPE_TARGET_TYPE (type
));
2316 if (ary_dim
!= NULL
&& ary_dim
->code () == TYPE_CODE_ARRAY
)
2317 elt_type
= resolve_dynamic_array_or_string (ary_dim
, addr_stack
, resolve_p
);
2319 elt_type
= TYPE_TARGET_TYPE (type
);
2321 prop
= type
->dyn_prop (DYN_PROP_BYTE_STRIDE
);
2322 if (prop
!= NULL
&& resolve_p
)
2324 if (dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2326 type
->remove_dyn_prop (DYN_PROP_BYTE_STRIDE
);
2327 bit_stride
= (unsigned int) (value
* 8);
2331 /* Could be a bug in our code, but it could also happen
2332 if the DWARF info is not correct. Issue a warning,
2333 and assume no byte/bit stride (leave bit_stride = 0). */
2334 warning (_("cannot determine array stride for type %s"),
2335 type
->name () ? type
->name () : "<no name>");
2339 bit_stride
= TYPE_FIELD_BITSIZE (type
, 0);
2341 return create_array_type_with_stride (type
, elt_type
, range_type
, NULL
,
2345 /* Resolve dynamic bounds of members of the union TYPE to static
2346 bounds. ADDR_STACK is a stack of struct property_addr_info
2347 to be used if needed during the dynamic resolution. */
2349 static struct type
*
2350 resolve_dynamic_union (struct type
*type
,
2351 struct property_addr_info
*addr_stack
)
2353 struct type
*resolved_type
;
2355 unsigned int max_len
= 0;
2357 gdb_assert (type
->code () == TYPE_CODE_UNION
);
2359 resolved_type
= copy_type (type
);
2360 resolved_type
->set_fields
2362 TYPE_ALLOC (resolved_type
,
2363 resolved_type
->num_fields () * sizeof (struct field
)));
2364 memcpy (resolved_type
->fields (),
2366 resolved_type
->num_fields () * sizeof (struct field
));
2367 for (i
= 0; i
< resolved_type
->num_fields (); ++i
)
2371 if (field_is_static (&type
->field (i
)))
2374 t
= resolve_dynamic_type_internal (resolved_type
->field (i
).type (),
2376 resolved_type
->field (i
).set_type (t
);
2378 struct type
*real_type
= check_typedef (t
);
2379 if (TYPE_LENGTH (real_type
) > max_len
)
2380 max_len
= TYPE_LENGTH (real_type
);
2383 TYPE_LENGTH (resolved_type
) = max_len
;
2384 return resolved_type
;
2387 /* See gdbtypes.h. */
2390 variant::matches (ULONGEST value
, bool is_unsigned
) const
2392 for (const discriminant_range
&range
: discriminants
)
2393 if (range
.contains (value
, is_unsigned
))
2399 compute_variant_fields_inner (struct type
*type
,
2400 struct property_addr_info
*addr_stack
,
2401 const variant_part
&part
,
2402 std::vector
<bool> &flags
);
2404 /* A helper function to determine which variant fields will be active.
2405 This handles both the variant's direct fields, and any variant
2406 parts embedded in this variant. TYPE is the type we're examining.
2407 ADDR_STACK holds information about the concrete object. VARIANT is
2408 the current variant to be handled. FLAGS is where the results are
2409 stored -- this function sets the Nth element in FLAGS if the
2410 corresponding field is enabled. ENABLED is whether this variant is
2414 compute_variant_fields_recurse (struct type
*type
,
2415 struct property_addr_info
*addr_stack
,
2416 const variant
&variant
,
2417 std::vector
<bool> &flags
,
2420 for (int field
= variant
.first_field
; field
< variant
.last_field
; ++field
)
2421 flags
[field
] = enabled
;
2423 for (const variant_part
&new_part
: variant
.parts
)
2426 compute_variant_fields_inner (type
, addr_stack
, new_part
, flags
);
2429 for (const auto &sub_variant
: new_part
.variants
)
2430 compute_variant_fields_recurse (type
, addr_stack
, sub_variant
,
2436 /* A helper function to determine which variant fields will be active.
2437 This evaluates the discriminant, decides which variant (if any) is
2438 active, and then updates FLAGS to reflect which fields should be
2439 available. TYPE is the type we're examining. ADDR_STACK holds
2440 information about the concrete object. VARIANT is the current
2441 variant to be handled. FLAGS is where the results are stored --
2442 this function sets the Nth element in FLAGS if the corresponding
2443 field is enabled. */
2446 compute_variant_fields_inner (struct type
*type
,
2447 struct property_addr_info
*addr_stack
,
2448 const variant_part
&part
,
2449 std::vector
<bool> &flags
)
2451 /* Evaluate the discriminant. */
2452 gdb::optional
<ULONGEST
> discr_value
;
2453 if (part
.discriminant_index
!= -1)
2455 int idx
= part
.discriminant_index
;
2457 if (type
->field (idx
).loc_kind () != FIELD_LOC_KIND_BITPOS
)
2458 error (_("Cannot determine struct field location"
2459 " (invalid location kind)"));
2461 if (addr_stack
->valaddr
.data () != NULL
)
2462 discr_value
= unpack_field_as_long (type
, addr_stack
->valaddr
.data (),
2466 CORE_ADDR addr
= (addr_stack
->addr
2467 + (type
->field (idx
).loc_bitpos ()
2468 / TARGET_CHAR_BIT
));
2470 LONGEST bitsize
= TYPE_FIELD_BITSIZE (type
, idx
);
2471 LONGEST size
= bitsize
/ 8;
2473 size
= TYPE_LENGTH (type
->field (idx
).type ());
2475 gdb_byte bits
[sizeof (ULONGEST
)];
2476 read_memory (addr
, bits
, size
);
2478 LONGEST bitpos
= (type
->field (idx
).loc_bitpos ()
2481 discr_value
= unpack_bits_as_long (type
->field (idx
).type (),
2482 bits
, bitpos
, bitsize
);
2486 /* Go through each variant and see which applies. */
2487 const variant
*default_variant
= nullptr;
2488 const variant
*applied_variant
= nullptr;
2489 for (const auto &variant
: part
.variants
)
2491 if (variant
.is_default ())
2492 default_variant
= &variant
;
2493 else if (discr_value
.has_value ()
2494 && variant
.matches (*discr_value
, part
.is_unsigned
))
2496 applied_variant
= &variant
;
2500 if (applied_variant
== nullptr)
2501 applied_variant
= default_variant
;
2503 for (const auto &variant
: part
.variants
)
2504 compute_variant_fields_recurse (type
, addr_stack
, variant
,
2505 flags
, applied_variant
== &variant
);
2508 /* Determine which variant fields are available in TYPE. The enabled
2509 fields are stored in RESOLVED_TYPE. ADDR_STACK holds information
2510 about the concrete object. PARTS describes the top-level variant
2511 parts for this type. */
2514 compute_variant_fields (struct type
*type
,
2515 struct type
*resolved_type
,
2516 struct property_addr_info
*addr_stack
,
2517 const gdb::array_view
<variant_part
> &parts
)
2519 /* Assume all fields are included by default. */
2520 std::vector
<bool> flags (resolved_type
->num_fields (), true);
2522 /* Now disable fields based on the variants that control them. */
2523 for (const auto &part
: parts
)
2524 compute_variant_fields_inner (type
, addr_stack
, part
, flags
);
2526 resolved_type
->set_num_fields
2527 (std::count (flags
.begin (), flags
.end (), true));
2528 resolved_type
->set_fields
2530 TYPE_ALLOC (resolved_type
,
2531 resolved_type
->num_fields () * sizeof (struct field
)));
2534 for (int i
= 0; i
< type
->num_fields (); ++i
)
2539 resolved_type
->field (out
) = type
->field (i
);
2544 /* Resolve dynamic bounds of members of the struct TYPE to static
2545 bounds. ADDR_STACK is a stack of struct property_addr_info to
2546 be used if needed during the dynamic resolution. */
2548 static struct type
*
2549 resolve_dynamic_struct (struct type
*type
,
2550 struct property_addr_info
*addr_stack
)
2552 struct type
*resolved_type
;
2554 unsigned resolved_type_bit_length
= 0;
2556 gdb_assert (type
->code () == TYPE_CODE_STRUCT
);
2558 resolved_type
= copy_type (type
);
2560 dynamic_prop
*variant_prop
= resolved_type
->dyn_prop (DYN_PROP_VARIANT_PARTS
);
2561 if (variant_prop
!= nullptr && variant_prop
->kind () == PROP_VARIANT_PARTS
)
2563 compute_variant_fields (type
, resolved_type
, addr_stack
,
2564 *variant_prop
->variant_parts ());
2565 /* We want to leave the property attached, so that the Rust code
2566 can tell whether the type was originally an enum. */
2567 variant_prop
->set_original_type (type
);
2571 resolved_type
->set_fields
2573 TYPE_ALLOC (resolved_type
,
2574 resolved_type
->num_fields () * sizeof (struct field
)));
2575 if (type
->num_fields () > 0)
2576 memcpy (resolved_type
->fields (),
2578 resolved_type
->num_fields () * sizeof (struct field
));
2581 for (i
= 0; i
< resolved_type
->num_fields (); ++i
)
2583 unsigned new_bit_length
;
2584 struct property_addr_info pinfo
;
2586 if (field_is_static (&resolved_type
->field (i
)))
2589 if (resolved_type
->field (i
).loc_kind () == FIELD_LOC_KIND_DWARF_BLOCK
)
2591 struct dwarf2_property_baton baton
;
2593 = lookup_pointer_type (resolved_type
->field (i
).type ());
2594 baton
.locexpr
= *resolved_type
->field (i
).loc_dwarf_block ();
2596 struct dynamic_prop prop
;
2597 prop
.set_locexpr (&baton
);
2600 if (dwarf2_evaluate_property (&prop
, nullptr, addr_stack
, &addr
,
2602 resolved_type
->field (i
).set_loc_bitpos
2603 (TARGET_CHAR_BIT
* (addr
- addr_stack
->addr
));
2606 /* As we know this field is not a static field, the field's
2607 field_loc_kind should be FIELD_LOC_KIND_BITPOS. Verify
2608 this is the case, but only trigger a simple error rather
2609 than an internal error if that fails. While failing
2610 that verification indicates a bug in our code, the error
2611 is not severe enough to suggest to the user he stops
2612 his debugging session because of it. */
2613 if (resolved_type
->field (i
).loc_kind () != FIELD_LOC_KIND_BITPOS
)
2614 error (_("Cannot determine struct field location"
2615 " (invalid location kind)"));
2617 pinfo
.type
= check_typedef (resolved_type
->field (i
).type ());
2618 size_t offset
= resolved_type
->field (i
).loc_bitpos () / TARGET_CHAR_BIT
;
2619 pinfo
.valaddr
= addr_stack
->valaddr
;
2620 if (!pinfo
.valaddr
.empty ())
2621 pinfo
.valaddr
= pinfo
.valaddr
.slice (offset
);
2622 pinfo
.addr
= addr_stack
->addr
+ offset
;
2623 pinfo
.next
= addr_stack
;
2625 resolved_type
->field (i
).set_type
2626 (resolve_dynamic_type_internal (resolved_type
->field (i
).type (),
2628 gdb_assert (resolved_type
->field (i
).loc_kind ()
2629 == FIELD_LOC_KIND_BITPOS
);
2631 new_bit_length
= resolved_type
->field (i
).loc_bitpos ();
2632 if (TYPE_FIELD_BITSIZE (resolved_type
, i
) != 0)
2633 new_bit_length
+= TYPE_FIELD_BITSIZE (resolved_type
, i
);
2636 struct type
*real_type
2637 = check_typedef (resolved_type
->field (i
).type ());
2639 new_bit_length
+= (TYPE_LENGTH (real_type
) * TARGET_CHAR_BIT
);
2642 /* Normally, we would use the position and size of the last field
2643 to determine the size of the enclosing structure. But GCC seems
2644 to be encoding the position of some fields incorrectly when
2645 the struct contains a dynamic field that is not placed last.
2646 So we compute the struct size based on the field that has
2647 the highest position + size - probably the best we can do. */
2648 if (new_bit_length
> resolved_type_bit_length
)
2649 resolved_type_bit_length
= new_bit_length
;
2652 /* The length of a type won't change for fortran, but it does for C and Ada.
2653 For fortran the size of dynamic fields might change over time but not the
2654 type length of the structure. If we adapt it, we run into problems
2655 when calculating the element offset for arrays of structs. */
2656 if (current_language
->la_language
!= language_fortran
)
2657 TYPE_LENGTH (resolved_type
)
2658 = (resolved_type_bit_length
+ TARGET_CHAR_BIT
- 1) / TARGET_CHAR_BIT
;
2660 /* The Ada language uses this field as a cache for static fixed types: reset
2661 it as RESOLVED_TYPE must have its own static fixed type. */
2662 TYPE_TARGET_TYPE (resolved_type
) = NULL
;
2664 return resolved_type
;
2667 /* Worker for resolved_dynamic_type. */
2669 static struct type
*
2670 resolve_dynamic_type_internal (struct type
*type
,
2671 struct property_addr_info
*addr_stack
,
2674 struct type
*real_type
= check_typedef (type
);
2675 struct type
*resolved_type
= nullptr;
2676 struct dynamic_prop
*prop
;
2679 if (!is_dynamic_type_internal (real_type
, top_level
))
2682 gdb::optional
<CORE_ADDR
> type_length
;
2683 prop
= TYPE_DYNAMIC_LENGTH (type
);
2685 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2686 type_length
= value
;
2688 if (type
->code () == TYPE_CODE_TYPEDEF
)
2690 resolved_type
= copy_type (type
);
2691 TYPE_TARGET_TYPE (resolved_type
)
2692 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
), addr_stack
,
2697 /* Before trying to resolve TYPE, make sure it is not a stub. */
2700 switch (type
->code ())
2704 struct property_addr_info pinfo
;
2706 pinfo
.type
= check_typedef (TYPE_TARGET_TYPE (type
));
2708 if (addr_stack
->valaddr
.data () != NULL
)
2709 pinfo
.addr
= extract_typed_address (addr_stack
->valaddr
.data (),
2712 pinfo
.addr
= read_memory_typed_address (addr_stack
->addr
, type
);
2713 pinfo
.next
= addr_stack
;
2715 resolved_type
= copy_type (type
);
2716 TYPE_TARGET_TYPE (resolved_type
)
2717 = resolve_dynamic_type_internal (TYPE_TARGET_TYPE (type
),
2722 case TYPE_CODE_STRING
:
2723 /* Strings are very much like an array of characters, and can be
2724 treated as one here. */
2725 case TYPE_CODE_ARRAY
:
2726 resolved_type
= resolve_dynamic_array_or_string (type
, addr_stack
);
2729 case TYPE_CODE_RANGE
:
2730 resolved_type
= resolve_dynamic_range (type
, addr_stack
);
2733 case TYPE_CODE_UNION
:
2734 resolved_type
= resolve_dynamic_union (type
, addr_stack
);
2737 case TYPE_CODE_STRUCT
:
2738 resolved_type
= resolve_dynamic_struct (type
, addr_stack
);
2743 if (resolved_type
== nullptr)
2746 if (type_length
.has_value ())
2748 TYPE_LENGTH (resolved_type
) = *type_length
;
2749 resolved_type
->remove_dyn_prop (DYN_PROP_BYTE_SIZE
);
2752 /* Resolve data_location attribute. */
2753 prop
= TYPE_DATA_LOCATION (resolved_type
);
2755 && dwarf2_evaluate_property (prop
, NULL
, addr_stack
, &value
))
2757 /* Start of Fortran hack. See comment in f-lang.h for what is going
2759 if (current_language
->la_language
== language_fortran
2760 && resolved_type
->code () == TYPE_CODE_ARRAY
)
2761 value
= fortran_adjust_dynamic_array_base_address_hack (resolved_type
,
2763 /* End of Fortran hack. */
2764 prop
->set_const_val (value
);
2767 return resolved_type
;
2770 /* See gdbtypes.h */
2773 resolve_dynamic_type (struct type
*type
,
2774 gdb::array_view
<const gdb_byte
> valaddr
,
2777 struct property_addr_info pinfo
2778 = {check_typedef (type
), valaddr
, addr
, NULL
};
2780 return resolve_dynamic_type_internal (type
, &pinfo
, 1);
2783 /* See gdbtypes.h */
2786 type::dyn_prop (dynamic_prop_node_kind prop_kind
) const
2788 dynamic_prop_list
*node
= this->main_type
->dyn_prop_list
;
2790 while (node
!= NULL
)
2792 if (node
->prop_kind
== prop_kind
)
2799 /* See gdbtypes.h */
2802 type::add_dyn_prop (dynamic_prop_node_kind prop_kind
, dynamic_prop prop
)
2804 struct dynamic_prop_list
*temp
;
2806 gdb_assert (this->is_objfile_owned ());
2808 temp
= XOBNEW (&this->objfile_owner ()->objfile_obstack
,
2809 struct dynamic_prop_list
);
2810 temp
->prop_kind
= prop_kind
;
2812 temp
->next
= this->main_type
->dyn_prop_list
;
2814 this->main_type
->dyn_prop_list
= temp
;
2817 /* See gdbtypes.h. */
2820 type::remove_dyn_prop (dynamic_prop_node_kind kind
)
2822 struct dynamic_prop_list
*prev_node
, *curr_node
;
2824 curr_node
= this->main_type
->dyn_prop_list
;
2827 while (NULL
!= curr_node
)
2829 if (curr_node
->prop_kind
== kind
)
2831 /* Update the linked list but don't free anything.
2832 The property was allocated on objstack and it is not known
2833 if we are on top of it. Nevertheless, everything is released
2834 when the complete objstack is freed. */
2835 if (NULL
== prev_node
)
2836 this->main_type
->dyn_prop_list
= curr_node
->next
;
2838 prev_node
->next
= curr_node
->next
;
2843 prev_node
= curr_node
;
2844 curr_node
= curr_node
->next
;
2848 /* Find the real type of TYPE. This function returns the real type,
2849 after removing all layers of typedefs, and completing opaque or stub
2850 types. Completion changes the TYPE argument, but stripping of
2853 Instance flags (e.g. const/volatile) are preserved as typedefs are
2854 stripped. If necessary a new qualified form of the underlying type
2857 NOTE: This will return a typedef if TYPE_TARGET_TYPE for the typedef has
2858 not been computed and we're either in the middle of reading symbols, or
2859 there was no name for the typedef in the debug info.
2861 NOTE: Lookup of opaque types can throw errors for invalid symbol files.
2862 QUITs in the symbol reading code can also throw.
2863 Thus this function can throw an exception.
2865 If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
2868 If this is a stubbed struct (i.e. declared as struct foo *), see if
2869 we can find a full definition in some other file. If so, copy this
2870 definition, so we can use it in future. There used to be a comment
2871 (but not any code) that if we don't find a full definition, we'd
2872 set a flag so we don't spend time in the future checking the same
2873 type. That would be a mistake, though--we might load in more
2874 symbols which contain a full definition for the type. */
2877 check_typedef (struct type
*type
)
2879 struct type
*orig_type
= type
;
2883 /* While we're removing typedefs, we don't want to lose qualifiers.
2884 E.g., const/volatile. */
2885 type_instance_flags instance_flags
= type
->instance_flags ();
2887 while (type
->code () == TYPE_CODE_TYPEDEF
)
2889 if (!TYPE_TARGET_TYPE (type
))
2894 /* It is dangerous to call lookup_symbol if we are currently
2895 reading a symtab. Infinite recursion is one danger. */
2896 if (currently_reading_symtab
)
2897 return make_qualified_type (type
, instance_flags
, NULL
);
2899 name
= type
->name ();
2900 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or
2901 VAR_DOMAIN as appropriate? */
2904 stub_noname_complaint ();
2905 return make_qualified_type (type
, instance_flags
, NULL
);
2907 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
2909 TYPE_TARGET_TYPE (type
) = SYMBOL_TYPE (sym
);
2910 else /* TYPE_CODE_UNDEF */
2911 TYPE_TARGET_TYPE (type
) = alloc_type_arch (type
->arch ());
2913 type
= TYPE_TARGET_TYPE (type
);
2915 /* Preserve the instance flags as we traverse down the typedef chain.
2917 Handling address spaces/classes is nasty, what do we do if there's a
2919 E.g., what if an outer typedef marks the type as class_1 and an inner
2920 typedef marks the type as class_2?
2921 This is the wrong place to do such error checking. We leave it to
2922 the code that created the typedef in the first place to flag the
2923 error. We just pick the outer address space (akin to letting the
2924 outer cast in a chain of casting win), instead of assuming
2925 "it can't happen". */
2927 const type_instance_flags ALL_SPACES
2928 = (TYPE_INSTANCE_FLAG_CODE_SPACE
2929 | TYPE_INSTANCE_FLAG_DATA_SPACE
);
2930 const type_instance_flags ALL_CLASSES
2931 = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
;
2933 type_instance_flags new_instance_flags
= type
->instance_flags ();
2935 /* Treat code vs data spaces and address classes separately. */
2936 if ((instance_flags
& ALL_SPACES
) != 0)
2937 new_instance_flags
&= ~ALL_SPACES
;
2938 if ((instance_flags
& ALL_CLASSES
) != 0)
2939 new_instance_flags
&= ~ALL_CLASSES
;
2941 instance_flags
|= new_instance_flags
;
2945 /* If this is a struct/class/union with no fields, then check
2946 whether a full definition exists somewhere else. This is for
2947 systems where a type definition with no fields is issued for such
2948 types, instead of identifying them as stub types in the first
2951 if (TYPE_IS_OPAQUE (type
)
2952 && opaque_type_resolution
2953 && !currently_reading_symtab
)
2955 const char *name
= type
->name ();
2956 struct type
*newtype
;
2960 stub_noname_complaint ();
2961 return make_qualified_type (type
, instance_flags
, NULL
);
2963 newtype
= lookup_transparent_type (name
);
2967 /* If the resolved type and the stub are in the same
2968 objfile, then replace the stub type with the real deal.
2969 But if they're in separate objfiles, leave the stub
2970 alone; we'll just look up the transparent type every time
2971 we call check_typedef. We can't create pointers between
2972 types allocated to different objfiles, since they may
2973 have different lifetimes. Trying to copy NEWTYPE over to
2974 TYPE's objfile is pointless, too, since you'll have to
2975 move over any other types NEWTYPE refers to, which could
2976 be an unbounded amount of stuff. */
2977 if (newtype
->objfile_owner () == type
->objfile_owner ())
2978 type
= make_qualified_type (newtype
, type
->instance_flags (), type
);
2983 /* Otherwise, rely on the stub flag being set for opaque/stubbed
2985 else if (type
->is_stub () && !currently_reading_symtab
)
2987 const char *name
= type
->name ();
2988 /* FIXME: shouldn't we look in STRUCT_DOMAIN and/or VAR_DOMAIN
2994 stub_noname_complaint ();
2995 return make_qualified_type (type
, instance_flags
, NULL
);
2997 sym
= lookup_symbol (name
, 0, STRUCT_DOMAIN
, 0).symbol
;
3000 /* Same as above for opaque types, we can replace the stub
3001 with the complete type only if they are in the same
3003 if (SYMBOL_TYPE (sym
)->objfile_owner () == type
->objfile_owner ())
3004 type
= make_qualified_type (SYMBOL_TYPE (sym
),
3005 type
->instance_flags (), type
);
3007 type
= SYMBOL_TYPE (sym
);
3011 if (type
->target_is_stub ())
3013 struct type
*target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
3015 if (target_type
->is_stub () || target_type
->target_is_stub ())
3017 /* Nothing we can do. */
3019 else if (type
->code () == TYPE_CODE_RANGE
)
3021 TYPE_LENGTH (type
) = TYPE_LENGTH (target_type
);
3022 type
->set_target_is_stub (false);
3024 else if (type
->code () == TYPE_CODE_ARRAY
3025 && update_static_array_size (type
))
3026 type
->set_target_is_stub (false);
3029 type
= make_qualified_type (type
, instance_flags
, NULL
);
3031 /* Cache TYPE_LENGTH for future use. */
3032 TYPE_LENGTH (orig_type
) = TYPE_LENGTH (type
);
3037 /* Parse a type expression in the string [P..P+LENGTH). If an error
3038 occurs, silently return a void type. */
3040 static struct type
*
3041 safe_parse_type (struct gdbarch
*gdbarch
, const char *p
, int length
)
3043 struct ui_file
*saved_gdb_stderr
;
3044 struct type
*type
= NULL
; /* Initialize to keep gcc happy. */
3046 /* Suppress error messages. */
3047 saved_gdb_stderr
= gdb_stderr
;
3048 gdb_stderr
= &null_stream
;
3050 /* Call parse_and_eval_type() without fear of longjmp()s. */
3053 type
= parse_and_eval_type (p
, length
);
3055 catch (const gdb_exception_error
&except
)
3057 type
= builtin_type (gdbarch
)->builtin_void
;
3060 /* Stop suppressing error messages. */
3061 gdb_stderr
= saved_gdb_stderr
;
3066 /* Ugly hack to convert method stubs into method types.
3068 He ain't kiddin'. This demangles the name of the method into a
3069 string including argument types, parses out each argument type,
3070 generates a string casting a zero to that type, evaluates the
3071 string, and stuffs the resulting type into an argtype vector!!!
3072 Then it knows the type of the whole function (including argument
3073 types for overloading), which info used to be in the stab's but was
3074 removed to hack back the space required for them. */
3077 check_stub_method (struct type
*type
, int method_id
, int signature_id
)
3079 struct gdbarch
*gdbarch
= type
->arch ();
3081 char *mangled_name
= gdb_mangle_name (type
, method_id
, signature_id
);
3082 gdb::unique_xmalloc_ptr
<char> demangled_name
3083 = gdb_demangle (mangled_name
, DMGL_PARAMS
| DMGL_ANSI
);
3084 char *argtypetext
, *p
;
3085 int depth
= 0, argcount
= 1;
3086 struct field
*argtypes
;
3089 /* Make sure we got back a function string that we can use. */
3091 p
= strchr (demangled_name
.get (), '(');
3095 if (demangled_name
== NULL
|| p
== NULL
)
3096 error (_("Internal: Cannot demangle mangled name `%s'."),
3099 /* Now, read in the parameters that define this type. */
3104 if (*p
== '(' || *p
== '<')
3108 else if (*p
== ')' || *p
== '>')
3112 else if (*p
== ',' && depth
== 0)
3120 /* If we read one argument and it was ``void'', don't count it. */
3121 if (startswith (argtypetext
, "(void)"))
3124 /* We need one extra slot, for the THIS pointer. */
3126 argtypes
= (struct field
*)
3127 TYPE_ALLOC (type
, (argcount
+ 1) * sizeof (struct field
));
3130 /* Add THIS pointer for non-static methods. */
3131 f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3132 if (TYPE_FN_FIELD_STATIC_P (f
, signature_id
))
3136 argtypes
[0].set_type (lookup_pointer_type (type
));
3140 if (*p
!= ')') /* () means no args, skip while. */
3145 if (depth
<= 0 && (*p
== ',' || *p
== ')'))
3147 /* Avoid parsing of ellipsis, they will be handled below.
3148 Also avoid ``void'' as above. */
3149 if (strncmp (argtypetext
, "...", p
- argtypetext
) != 0
3150 && strncmp (argtypetext
, "void", p
- argtypetext
) != 0)
3152 argtypes
[argcount
].set_type
3153 (safe_parse_type (gdbarch
, argtypetext
, p
- argtypetext
));
3156 argtypetext
= p
+ 1;
3159 if (*p
== '(' || *p
== '<')
3163 else if (*p
== ')' || *p
== '>')
3172 TYPE_FN_FIELD_PHYSNAME (f
, signature_id
) = mangled_name
;
3174 /* Now update the old "stub" type into a real type. */
3175 mtype
= TYPE_FN_FIELD_TYPE (f
, signature_id
);
3176 /* MTYPE may currently be a function (TYPE_CODE_FUNC).
3177 We want a method (TYPE_CODE_METHOD). */
3178 smash_to_method_type (mtype
, type
, TYPE_TARGET_TYPE (mtype
),
3179 argtypes
, argcount
, p
[-2] == '.');
3180 mtype
->set_is_stub (false);
3181 TYPE_FN_FIELD_STUB (f
, signature_id
) = 0;
3184 /* This is the external interface to check_stub_method, above. This
3185 function unstubs all of the signatures for TYPE's METHOD_ID method
3186 name. After calling this function TYPE_FN_FIELD_STUB will be
3187 cleared for each signature and TYPE_FN_FIELDLIST_NAME will be
3190 This function unfortunately can not die until stabs do. */
3193 check_stub_method_group (struct type
*type
, int method_id
)
3195 int len
= TYPE_FN_FIELDLIST_LENGTH (type
, method_id
);
3196 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
3198 for (int j
= 0; j
< len
; j
++)
3200 if (TYPE_FN_FIELD_STUB (f
, j
))
3201 check_stub_method (type
, method_id
, j
);
3205 /* Ensure it is in .rodata (if available) by working around GCC PR 44690. */
3206 const struct cplus_struct_type cplus_struct_default
= { };
3209 allocate_cplus_struct_type (struct type
*type
)
3211 if (HAVE_CPLUS_STRUCT (type
))
3212 /* Structure was already allocated. Nothing more to do. */
3215 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_CPLUS_STUFF
;
3216 TYPE_RAW_CPLUS_SPECIFIC (type
) = (struct cplus_struct_type
*)
3217 TYPE_ALLOC (type
, sizeof (struct cplus_struct_type
));
3218 *(TYPE_RAW_CPLUS_SPECIFIC (type
)) = cplus_struct_default
;
3219 set_type_vptr_fieldno (type
, -1);
3222 const struct gnat_aux_type gnat_aux_default
=
3225 /* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
3226 and allocate the associated gnat-specific data. The gnat-specific
3227 data is also initialized to gnat_aux_default. */
3230 allocate_gnat_aux_type (struct type
*type
)
3232 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_GNAT_STUFF
;
3233 TYPE_GNAT_SPECIFIC (type
) = (struct gnat_aux_type
*)
3234 TYPE_ALLOC (type
, sizeof (struct gnat_aux_type
));
3235 *(TYPE_GNAT_SPECIFIC (type
)) = gnat_aux_default
;
3238 /* Helper function to initialize a newly allocated type. Set type code
3239 to CODE and initialize the type-specific fields accordingly. */
3242 set_type_code (struct type
*type
, enum type_code code
)
3244 type
->set_code (code
);
3248 case TYPE_CODE_STRUCT
:
3249 case TYPE_CODE_UNION
:
3250 case TYPE_CODE_NAMESPACE
:
3251 INIT_CPLUS_SPECIFIC (type
);
3254 TYPE_SPECIFIC_FIELD (type
) = TYPE_SPECIFIC_FLOATFORMAT
;
3256 case TYPE_CODE_FUNC
:
3257 INIT_FUNC_SPECIFIC (type
);
3259 case TYPE_CODE_FIXED_POINT
:
3260 INIT_FIXED_POINT_SPECIFIC (type
);
3265 /* Helper function to verify floating-point format and size.
3266 BIT is the type size in bits; if BIT equals -1, the size is
3267 determined by the floatformat. Returns size to be used. */
3270 verify_floatformat (int bit
, const struct floatformat
*floatformat
)
3272 gdb_assert (floatformat
!= NULL
);
3275 bit
= floatformat
->totalsize
;
3277 gdb_assert (bit
>= 0);
3278 gdb_assert (bit
>= floatformat
->totalsize
);
3283 /* Return the floating-point format for a floating-point variable of
3286 const struct floatformat
*
3287 floatformat_from_type (const struct type
*type
)
3289 gdb_assert (type
->code () == TYPE_CODE_FLT
);
3290 gdb_assert (TYPE_FLOATFORMAT (type
));
3291 return TYPE_FLOATFORMAT (type
);
3294 /* Helper function to initialize the standard scalar types.
3296 If NAME is non-NULL, then it is used to initialize the type name.
3297 Note that NAME is not copied; it is required to have a lifetime at
3298 least as long as OBJFILE. */
3301 init_type (struct objfile
*objfile
, enum type_code code
, int bit
,
3306 type
= alloc_type (objfile
);
3307 set_type_code (type
, code
);
3308 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
3309 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
3310 type
->set_name (name
);
3315 /* Allocate a TYPE_CODE_ERROR type structure associated with OBJFILE,
3316 to use with variables that have no debug info. NAME is the type
3319 static struct type
*
3320 init_nodebug_var_type (struct objfile
*objfile
, const char *name
)
3322 return init_type (objfile
, TYPE_CODE_ERROR
, 0, name
);
3325 /* Allocate a TYPE_CODE_INT type structure associated with OBJFILE.
3326 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3327 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3330 init_integer_type (struct objfile
*objfile
,
3331 int bit
, int unsigned_p
, const char *name
)
3335 t
= init_type (objfile
, TYPE_CODE_INT
, bit
, name
);
3337 t
->set_is_unsigned (true);
3339 TYPE_SPECIFIC_FIELD (t
) = TYPE_SPECIFIC_INT
;
3340 TYPE_MAIN_TYPE (t
)->type_specific
.int_stuff
.bit_size
= bit
;
3341 TYPE_MAIN_TYPE (t
)->type_specific
.int_stuff
.bit_offset
= 0;
3346 /* Allocate a TYPE_CODE_CHAR type structure associated with OBJFILE.
3347 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3348 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3351 init_character_type (struct objfile
*objfile
,
3352 int bit
, int unsigned_p
, const char *name
)
3356 t
= init_type (objfile
, TYPE_CODE_CHAR
, bit
, name
);
3358 t
->set_is_unsigned (true);
3363 /* Allocate a TYPE_CODE_BOOL type structure associated with OBJFILE.
3364 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
3365 the type's TYPE_UNSIGNED flag. NAME is the type name. */
3368 init_boolean_type (struct objfile
*objfile
,
3369 int bit
, int unsigned_p
, const char *name
)
3373 t
= init_type (objfile
, TYPE_CODE_BOOL
, bit
, name
);
3375 t
->set_is_unsigned (true);
3377 TYPE_SPECIFIC_FIELD (t
) = TYPE_SPECIFIC_INT
;
3378 TYPE_MAIN_TYPE (t
)->type_specific
.int_stuff
.bit_size
= bit
;
3379 TYPE_MAIN_TYPE (t
)->type_specific
.int_stuff
.bit_offset
= 0;
3384 /* Allocate a TYPE_CODE_FLT type structure associated with OBJFILE.
3385 BIT is the type size in bits; if BIT equals -1, the size is
3386 determined by the floatformat. NAME is the type name. Set the
3387 TYPE_FLOATFORMAT from FLOATFORMATS. BYTE_ORDER is the byte order
3388 to use. If it is BFD_ENDIAN_UNKNOWN (the default), then the byte
3389 order of the objfile's architecture is used. */
3392 init_float_type (struct objfile
*objfile
,
3393 int bit
, const char *name
,
3394 const struct floatformat
**floatformats
,
3395 enum bfd_endian byte_order
)
3397 if (byte_order
== BFD_ENDIAN_UNKNOWN
)
3399 struct gdbarch
*gdbarch
= objfile
->arch ();
3400 byte_order
= gdbarch_byte_order (gdbarch
);
3402 const struct floatformat
*fmt
= floatformats
[byte_order
];
3405 bit
= verify_floatformat (bit
, fmt
);
3406 t
= init_type (objfile
, TYPE_CODE_FLT
, bit
, name
);
3407 TYPE_FLOATFORMAT (t
) = fmt
;
3412 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with OBJFILE.
3413 BIT is the type size in bits. NAME is the type name. */
3416 init_decfloat_type (struct objfile
*objfile
, int bit
, const char *name
)
3420 t
= init_type (objfile
, TYPE_CODE_DECFLOAT
, bit
, name
);
3424 /* Return true if init_complex_type can be called with TARGET_TYPE. */
3427 can_create_complex_type (struct type
*target_type
)
3429 return (target_type
->code () == TYPE_CODE_INT
3430 || target_type
->code () == TYPE_CODE_FLT
);
3433 /* Allocate a TYPE_CODE_COMPLEX type structure. NAME is the type
3434 name. TARGET_TYPE is the component type. */
3437 init_complex_type (const char *name
, struct type
*target_type
)
3441 gdb_assert (can_create_complex_type (target_type
));
3443 if (TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
== nullptr)
3445 if (name
== nullptr && target_type
->name () != nullptr)
3448 = (char *) TYPE_ALLOC (target_type
,
3449 strlen (target_type
->name ())
3450 + strlen ("_Complex ") + 1);
3451 strcpy (new_name
, "_Complex ");
3452 strcat (new_name
, target_type
->name ());
3456 t
= alloc_type_copy (target_type
);
3457 set_type_code (t
, TYPE_CODE_COMPLEX
);
3458 TYPE_LENGTH (t
) = 2 * TYPE_LENGTH (target_type
);
3461 TYPE_TARGET_TYPE (t
) = target_type
;
3462 TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
= t
;
3465 return TYPE_MAIN_TYPE (target_type
)->flds_bnds
.complex_type
;
3468 /* Allocate a TYPE_CODE_PTR type structure associated with OBJFILE.
3469 BIT is the pointer type size in bits. NAME is the type name.
3470 TARGET_TYPE is the pointer target type. Always sets the pointer type's
3471 TYPE_UNSIGNED flag. */
3474 init_pointer_type (struct objfile
*objfile
,
3475 int bit
, const char *name
, struct type
*target_type
)
3479 t
= init_type (objfile
, TYPE_CODE_PTR
, bit
, name
);
3480 TYPE_TARGET_TYPE (t
) = target_type
;
3481 t
->set_is_unsigned (true);
3485 /* Allocate a TYPE_CODE_FIXED_POINT type structure associated with OBJFILE.
3486 BIT is the pointer type size in bits.
3487 UNSIGNED_P should be nonzero if the type is unsigned.
3488 NAME is the type name. */
3491 init_fixed_point_type (struct objfile
*objfile
,
3492 int bit
, int unsigned_p
, const char *name
)
3496 t
= init_type (objfile
, TYPE_CODE_FIXED_POINT
, bit
, name
);
3498 t
->set_is_unsigned (true);
3503 /* See gdbtypes.h. */
3506 type_raw_align (struct type
*type
)
3508 if (type
->align_log2
!= 0)
3509 return 1 << (type
->align_log2
- 1);
3513 /* See gdbtypes.h. */
3516 type_align (struct type
*type
)
3518 /* Check alignment provided in the debug information. */
3519 unsigned raw_align
= type_raw_align (type
);
3523 /* Allow the architecture to provide an alignment. */
3524 ULONGEST align
= gdbarch_type_align (type
->arch (), type
);
3528 switch (type
->code ())
3531 case TYPE_CODE_FUNC
:
3532 case TYPE_CODE_FLAGS
:
3534 case TYPE_CODE_RANGE
:
3536 case TYPE_CODE_ENUM
:
3538 case TYPE_CODE_RVALUE_REF
:
3539 case TYPE_CODE_CHAR
:
3540 case TYPE_CODE_BOOL
:
3541 case TYPE_CODE_DECFLOAT
:
3542 case TYPE_CODE_METHODPTR
:
3543 case TYPE_CODE_MEMBERPTR
:
3544 align
= type_length_units (check_typedef (type
));
3547 case TYPE_CODE_ARRAY
:
3548 case TYPE_CODE_COMPLEX
:
3549 case TYPE_CODE_TYPEDEF
:
3550 align
= type_align (TYPE_TARGET_TYPE (type
));
3553 case TYPE_CODE_STRUCT
:
3554 case TYPE_CODE_UNION
:
3556 int number_of_non_static_fields
= 0;
3557 for (unsigned i
= 0; i
< type
->num_fields (); ++i
)
3559 if (!field_is_static (&type
->field (i
)))
3561 number_of_non_static_fields
++;
3562 ULONGEST f_align
= type_align (type
->field (i
).type ());
3565 /* Don't pretend we know something we don't. */
3569 if (f_align
> align
)
3573 /* A struct with no fields, or with only static fields has an
3575 if (number_of_non_static_fields
== 0)
3581 case TYPE_CODE_STRING
:
3582 /* Not sure what to do here, and these can't appear in C or C++
3586 case TYPE_CODE_VOID
:
3590 case TYPE_CODE_ERROR
:
3591 case TYPE_CODE_METHOD
:
3596 if ((align
& (align
- 1)) != 0)
3598 /* Not a power of 2, so pass. */
3605 /* See gdbtypes.h. */
3608 set_type_align (struct type
*type
, ULONGEST align
)
3610 /* Must be a power of 2. Zero is ok. */
3611 gdb_assert ((align
& (align
- 1)) == 0);
3613 unsigned result
= 0;
3620 if (result
>= (1 << TYPE_ALIGN_BITS
))
3623 type
->align_log2
= result
;
3628 /* Queries on types. */
3631 can_dereference (struct type
*t
)
3633 /* FIXME: Should we return true for references as well as
3635 t
= check_typedef (t
);
3638 && t
->code () == TYPE_CODE_PTR
3639 && TYPE_TARGET_TYPE (t
)->code () != TYPE_CODE_VOID
);
3643 is_integral_type (struct type
*t
)
3645 t
= check_typedef (t
);
3648 && !is_fixed_point_type (t
)
3649 && ((t
->code () == TYPE_CODE_INT
)
3650 || (t
->code () == TYPE_CODE_ENUM
)
3651 || (t
->code () == TYPE_CODE_FLAGS
)
3652 || (t
->code () == TYPE_CODE_CHAR
)
3653 || (t
->code () == TYPE_CODE_RANGE
)
3654 || (t
->code () == TYPE_CODE_BOOL
)));
3658 is_floating_type (struct type
*t
)
3660 t
= check_typedef (t
);
3663 && ((t
->code () == TYPE_CODE_FLT
)
3664 || (t
->code () == TYPE_CODE_DECFLOAT
)));
3667 /* Return true if TYPE is scalar. */
3670 is_scalar_type (struct type
*type
)
3672 type
= check_typedef (type
);
3674 if (is_fixed_point_type (type
))
3675 return 0; /* Implemented as a scalar, but more like a floating point. */
3677 switch (type
->code ())
3679 case TYPE_CODE_ARRAY
:
3680 case TYPE_CODE_STRUCT
:
3681 case TYPE_CODE_UNION
:
3683 case TYPE_CODE_STRING
:
3690 /* Return true if T is scalar, or a composite type which in practice has
3691 the memory layout of a scalar type. E.g., an array or struct with only
3692 one scalar element inside it, or a union with only scalar elements. */
3695 is_scalar_type_recursive (struct type
*t
)
3697 t
= check_typedef (t
);
3699 if (is_scalar_type (t
))
3701 /* Are we dealing with an array or string of known dimensions? */
3702 else if ((t
->code () == TYPE_CODE_ARRAY
3703 || t
->code () == TYPE_CODE_STRING
) && t
->num_fields () == 1
3704 && t
->index_type ()->code () == TYPE_CODE_RANGE
)
3706 LONGEST low_bound
, high_bound
;
3707 struct type
*elt_type
= check_typedef (TYPE_TARGET_TYPE (t
));
3709 if (get_discrete_bounds (t
->index_type (), &low_bound
, &high_bound
))
3710 return (high_bound
== low_bound
3711 && is_scalar_type_recursive (elt_type
));
3715 /* Are we dealing with a struct with one element? */
3716 else if (t
->code () == TYPE_CODE_STRUCT
&& t
->num_fields () == 1)
3717 return is_scalar_type_recursive (t
->field (0).type ());
3718 else if (t
->code () == TYPE_CODE_UNION
)
3720 int i
, n
= t
->num_fields ();
3722 /* If all elements of the union are scalar, then the union is scalar. */
3723 for (i
= 0; i
< n
; i
++)
3724 if (!is_scalar_type_recursive (t
->field (i
).type ()))
3733 /* Return true is T is a class or a union. False otherwise. */
3736 class_or_union_p (const struct type
*t
)
3738 return (t
->code () == TYPE_CODE_STRUCT
3739 || t
->code () == TYPE_CODE_UNION
);
3742 /* A helper function which returns true if types A and B represent the
3743 "same" class type. This is true if the types have the same main
3744 type, or the same name. */
3747 class_types_same_p (const struct type
*a
, const struct type
*b
)
3749 return (TYPE_MAIN_TYPE (a
) == TYPE_MAIN_TYPE (b
)
3750 || (a
->name () && b
->name ()
3751 && !strcmp (a
->name (), b
->name ())));
3754 /* If BASE is an ancestor of DCLASS return the distance between them.
3755 otherwise return -1;
3759 class B: public A {};
3760 class C: public B {};
3763 distance_to_ancestor (A, A, 0) = 0
3764 distance_to_ancestor (A, B, 0) = 1
3765 distance_to_ancestor (A, C, 0) = 2
3766 distance_to_ancestor (A, D, 0) = 3
3768 If PUBLIC is 1 then only public ancestors are considered,
3769 and the function returns the distance only if BASE is a public ancestor
3773 distance_to_ancestor (A, D, 1) = -1. */
3776 distance_to_ancestor (struct type
*base
, struct type
*dclass
, int is_public
)
3781 base
= check_typedef (base
);
3782 dclass
= check_typedef (dclass
);
3784 if (class_types_same_p (base
, dclass
))
3787 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
); i
++)
3789 if (is_public
&& ! BASETYPE_VIA_PUBLIC (dclass
, i
))
3792 d
= distance_to_ancestor (base
, TYPE_BASECLASS (dclass
, i
), is_public
);
3800 /* Check whether BASE is an ancestor or base class or DCLASS
3801 Return 1 if so, and 0 if not.
3802 Note: If BASE and DCLASS are of the same type, this function
3803 will return 1. So for some class A, is_ancestor (A, A) will
3807 is_ancestor (struct type
*base
, struct type
*dclass
)
3809 return distance_to_ancestor (base
, dclass
, 0) >= 0;
3812 /* Like is_ancestor, but only returns true when BASE is a public
3813 ancestor of DCLASS. */
3816 is_public_ancestor (struct type
*base
, struct type
*dclass
)
3818 return distance_to_ancestor (base
, dclass
, 1) >= 0;
3821 /* A helper function for is_unique_ancestor. */
3824 is_unique_ancestor_worker (struct type
*base
, struct type
*dclass
,
3826 const gdb_byte
*valaddr
, int embedded_offset
,
3827 CORE_ADDR address
, struct value
*val
)
3831 base
= check_typedef (base
);
3832 dclass
= check_typedef (dclass
);
3834 for (i
= 0; i
< TYPE_N_BASECLASSES (dclass
) && count
< 2; ++i
)
3839 iter
= check_typedef (TYPE_BASECLASS (dclass
, i
));
3841 this_offset
= baseclass_offset (dclass
, i
, valaddr
, embedded_offset
,
3844 if (class_types_same_p (base
, iter
))
3846 /* If this is the first subclass, set *OFFSET and set count
3847 to 1. Otherwise, if this is at the same offset as
3848 previous instances, do nothing. Otherwise, increment
3852 *offset
= this_offset
;
3855 else if (this_offset
== *offset
)
3863 count
+= is_unique_ancestor_worker (base
, iter
, offset
,
3865 embedded_offset
+ this_offset
,
3872 /* Like is_ancestor, but only returns true if BASE is a unique base
3873 class of the type of VAL. */
3876 is_unique_ancestor (struct type
*base
, struct value
*val
)
3880 return is_unique_ancestor_worker (base
, value_type (val
), &offset
,
3881 value_contents_for_printing (val
).data (),
3882 value_embedded_offset (val
),
3883 value_address (val
), val
) == 1;
3886 /* See gdbtypes.h. */
3889 type_byte_order (const struct type
*type
)
3891 bfd_endian byteorder
= gdbarch_byte_order (type
->arch ());
3892 if (type
->endianity_is_not_default ())
3894 if (byteorder
== BFD_ENDIAN_BIG
)
3895 return BFD_ENDIAN_LITTLE
;
3898 gdb_assert (byteorder
== BFD_ENDIAN_LITTLE
);
3899 return BFD_ENDIAN_BIG
;
3907 /* Overload resolution. */
3909 /* Return the sum of the rank of A with the rank of B. */
3912 sum_ranks (struct rank a
, struct rank b
)
3915 c
.rank
= a
.rank
+ b
.rank
;
3916 c
.subrank
= a
.subrank
+ b
.subrank
;
3920 /* Compare rank A and B and return:
3922 1 if a is better than b
3923 -1 if b is better than a. */
3926 compare_ranks (struct rank a
, struct rank b
)
3928 if (a
.rank
== b
.rank
)
3930 if (a
.subrank
== b
.subrank
)
3932 if (a
.subrank
< b
.subrank
)
3934 if (a
.subrank
> b
.subrank
)
3938 if (a
.rank
< b
.rank
)
3941 /* a.rank > b.rank */
3945 /* Functions for overload resolution begin here. */
3947 /* Compare two badness vectors A and B and return the result.
3948 0 => A and B are identical
3949 1 => A and B are incomparable
3950 2 => A is better than B
3951 3 => A is worse than B */
3954 compare_badness (const badness_vector
&a
, const badness_vector
&b
)
3958 short found_pos
= 0; /* any positives in c? */
3959 short found_neg
= 0; /* any negatives in c? */
3961 /* differing sizes => incomparable */
3962 if (a
.size () != b
.size ())
3965 /* Subtract b from a */
3966 for (i
= 0; i
< a
.size (); i
++)
3968 tmp
= compare_ranks (b
[i
], a
[i
]);
3978 return 1; /* incomparable */
3980 return 3; /* A > B */
3986 return 2; /* A < B */
3988 return 0; /* A == B */
3992 /* Rank a function by comparing its parameter types (PARMS), to the
3993 types of an argument list (ARGS). Return the badness vector. This
3994 has ARGS.size() + 1 entries. */
3997 rank_function (gdb::array_view
<type
*> parms
,
3998 gdb::array_view
<value
*> args
)
4000 /* add 1 for the length-match rank. */
4002 bv
.reserve (1 + args
.size ());
4004 /* First compare the lengths of the supplied lists.
4005 If there is a mismatch, set it to a high value. */
4007 /* pai/1997-06-03 FIXME: when we have debug info about default
4008 arguments and ellipsis parameter lists, we should consider those
4009 and rank the length-match more finely. */
4011 bv
.push_back ((args
.size () != parms
.size ())
4012 ? LENGTH_MISMATCH_BADNESS
4013 : EXACT_MATCH_BADNESS
);
4015 /* Now rank all the parameters of the candidate function. */
4016 size_t min_len
= std::min (parms
.size (), args
.size ());
4018 for (size_t i
= 0; i
< min_len
; i
++)
4019 bv
.push_back (rank_one_type (parms
[i
], value_type (args
[i
]),
4022 /* If more arguments than parameters, add dummy entries. */
4023 for (size_t i
= min_len
; i
< args
.size (); i
++)
4024 bv
.push_back (TOO_FEW_PARAMS_BADNESS
);
4029 /* Compare the names of two integer types, assuming that any sign
4030 qualifiers have been checked already. We do it this way because
4031 there may be an "int" in the name of one of the types. */
4034 integer_types_same_name_p (const char *first
, const char *second
)
4036 int first_p
, second_p
;
4038 /* If both are shorts, return 1; if neither is a short, keep
4040 first_p
= (strstr (first
, "short") != NULL
);
4041 second_p
= (strstr (second
, "short") != NULL
);
4042 if (first_p
&& second_p
)
4044 if (first_p
|| second_p
)
4047 /* Likewise for long. */
4048 first_p
= (strstr (first
, "long") != NULL
);
4049 second_p
= (strstr (second
, "long") != NULL
);
4050 if (first_p
&& second_p
)
4052 if (first_p
|| second_p
)
4055 /* Likewise for char. */
4056 first_p
= (strstr (first
, "char") != NULL
);
4057 second_p
= (strstr (second
, "char") != NULL
);
4058 if (first_p
&& second_p
)
4060 if (first_p
|| second_p
)
4063 /* They must both be ints. */
4067 /* Compares type A to type B. Returns true if they represent the same
4068 type, false otherwise. */
4071 types_equal (struct type
*a
, struct type
*b
)
4073 /* Identical type pointers. */
4074 /* However, this still doesn't catch all cases of same type for b
4075 and a. The reason is that builtin types are different from
4076 the same ones constructed from the object. */
4080 /* Resolve typedefs */
4081 if (a
->code () == TYPE_CODE_TYPEDEF
)
4082 a
= check_typedef (a
);
4083 if (b
->code () == TYPE_CODE_TYPEDEF
)
4084 b
= check_typedef (b
);
4086 /* Check if identical after resolving typedefs. */
4090 /* If after resolving typedefs a and b are not of the same type
4091 code then they are not equal. */
4092 if (a
->code () != b
->code ())
4095 /* If a and b are both pointers types or both reference types then
4096 they are equal of the same type iff the objects they refer to are
4097 of the same type. */
4098 if (a
->code () == TYPE_CODE_PTR
4099 || a
->code () == TYPE_CODE_REF
)
4100 return types_equal (TYPE_TARGET_TYPE (a
),
4101 TYPE_TARGET_TYPE (b
));
4103 /* Well, damnit, if the names are exactly the same, I'll say they
4104 are exactly the same. This happens when we generate method
4105 stubs. The types won't point to the same address, but they
4106 really are the same. */
4108 if (a
->name () && b
->name ()
4109 && strcmp (a
->name (), b
->name ()) == 0)
4112 /* Two function types are equal if their argument and return types
4114 if (a
->code () == TYPE_CODE_FUNC
)
4118 if (a
->num_fields () != b
->num_fields ())
4121 if (!types_equal (TYPE_TARGET_TYPE (a
), TYPE_TARGET_TYPE (b
)))
4124 for (i
= 0; i
< a
->num_fields (); ++i
)
4125 if (!types_equal (a
->field (i
).type (), b
->field (i
).type ()))
4134 /* Deep comparison of types. */
4136 /* An entry in the type-equality bcache. */
4138 struct type_equality_entry
4140 type_equality_entry (struct type
*t1
, struct type
*t2
)
4146 struct type
*type1
, *type2
;
4149 /* A helper function to compare two strings. Returns true if they are
4150 the same, false otherwise. Handles NULLs properly. */
4153 compare_maybe_null_strings (const char *s
, const char *t
)
4155 if (s
== NULL
|| t
== NULL
)
4157 return strcmp (s
, t
) == 0;
4160 /* A helper function for check_types_worklist that checks two types for
4161 "deep" equality. Returns true if the types are considered the
4162 same, false otherwise. */
4165 check_types_equal (struct type
*type1
, struct type
*type2
,
4166 std::vector
<type_equality_entry
> *worklist
)
4168 type1
= check_typedef (type1
);
4169 type2
= check_typedef (type2
);
4174 if (type1
->code () != type2
->code ()
4175 || TYPE_LENGTH (type1
) != TYPE_LENGTH (type2
)
4176 || type1
->is_unsigned () != type2
->is_unsigned ()
4177 || type1
->has_no_signedness () != type2
->has_no_signedness ()
4178 || type1
->endianity_is_not_default () != type2
->endianity_is_not_default ()
4179 || type1
->has_varargs () != type2
->has_varargs ()
4180 || type1
->is_vector () != type2
->is_vector ()
4181 || TYPE_NOTTEXT (type1
) != TYPE_NOTTEXT (type2
)
4182 || type1
->instance_flags () != type2
->instance_flags ()
4183 || type1
->num_fields () != type2
->num_fields ())
4186 if (!compare_maybe_null_strings (type1
->name (), type2
->name ()))
4188 if (!compare_maybe_null_strings (type1
->name (), type2
->name ()))
4191 if (type1
->code () == TYPE_CODE_RANGE
)
4193 if (*type1
->bounds () != *type2
->bounds ())
4200 for (i
= 0; i
< type1
->num_fields (); ++i
)
4202 const struct field
*field1
= &type1
->field (i
);
4203 const struct field
*field2
= &type2
->field (i
);
4205 if (FIELD_ARTIFICIAL (*field1
) != FIELD_ARTIFICIAL (*field2
)
4206 || FIELD_BITSIZE (*field1
) != FIELD_BITSIZE (*field2
)
4207 || field1
->loc_kind () != field2
->loc_kind ())
4209 if (!compare_maybe_null_strings (field1
->name (), field2
->name ()))
4211 switch (field1
->loc_kind ())
4213 case FIELD_LOC_KIND_BITPOS
:
4214 if (field1
->loc_bitpos () != field2
->loc_bitpos ())
4217 case FIELD_LOC_KIND_ENUMVAL
:
4218 if (field1
->loc_enumval () != field2
->loc_enumval ())
4220 /* Don't compare types of enum fields, because they don't
4223 case FIELD_LOC_KIND_PHYSADDR
:
4224 if (field1
->loc_physaddr () != field2
->loc_physaddr ())
4227 case FIELD_LOC_KIND_PHYSNAME
:
4228 if (!compare_maybe_null_strings (field1
->loc_physname (),
4229 field2
->loc_physname ()))
4232 case FIELD_LOC_KIND_DWARF_BLOCK
:
4234 struct dwarf2_locexpr_baton
*block1
, *block2
;
4236 block1
= field1
->loc_dwarf_block ();
4237 block2
= field2
->loc_dwarf_block ();
4238 if (block1
->per_cu
!= block2
->per_cu
4239 || block1
->size
!= block2
->size
4240 || memcmp (block1
->data
, block2
->data
, block1
->size
) != 0)
4245 internal_error (__FILE__
, __LINE__
, _("Unsupported field kind "
4246 "%d by check_types_equal"),
4247 field1
->loc_kind ());
4250 worklist
->emplace_back (field1
->type (), field2
->type ());
4254 if (TYPE_TARGET_TYPE (type1
) != NULL
)
4256 if (TYPE_TARGET_TYPE (type2
) == NULL
)
4259 worklist
->emplace_back (TYPE_TARGET_TYPE (type1
),
4260 TYPE_TARGET_TYPE (type2
));
4262 else if (TYPE_TARGET_TYPE (type2
) != NULL
)
4268 /* Check types on a worklist for equality. Returns false if any pair
4269 is not equal, true if they are all considered equal. */
4272 check_types_worklist (std::vector
<type_equality_entry
> *worklist
,
4275 while (!worklist
->empty ())
4279 struct type_equality_entry entry
= std::move (worklist
->back ());
4280 worklist
->pop_back ();
4282 /* If the type pair has already been visited, we know it is
4284 cache
->insert (&entry
, sizeof (entry
), &added
);
4288 if (!check_types_equal (entry
.type1
, entry
.type2
, worklist
))
4295 /* Return true if types TYPE1 and TYPE2 are equal, as determined by a
4296 "deep comparison". Otherwise return false. */
4299 types_deeply_equal (struct type
*type1
, struct type
*type2
)
4301 std::vector
<type_equality_entry
> worklist
;
4303 gdb_assert (type1
!= NULL
&& type2
!= NULL
);
4305 /* Early exit for the simple case. */
4310 worklist
.emplace_back (type1
, type2
);
4311 return check_types_worklist (&worklist
, &cache
);
4314 /* Allocated status of type TYPE. Return zero if type TYPE is allocated.
4315 Otherwise return one. */
4318 type_not_allocated (const struct type
*type
)
4320 struct dynamic_prop
*prop
= TYPE_ALLOCATED_PROP (type
);
4322 return (prop
!= nullptr && prop
->kind () == PROP_CONST
4323 && prop
->const_val () == 0);
4326 /* Associated status of type TYPE. Return zero if type TYPE is associated.
4327 Otherwise return one. */
4330 type_not_associated (const struct type
*type
)
4332 struct dynamic_prop
*prop
= TYPE_ASSOCIATED_PROP (type
);
4334 return (prop
!= nullptr && prop
->kind () == PROP_CONST
4335 && prop
->const_val () == 0);
4338 /* rank_one_type helper for when PARM's type code is TYPE_CODE_PTR. */
4341 rank_one_type_parm_ptr (struct type
*parm
, struct type
*arg
, struct value
*value
)
4343 struct rank rank
= {0,0};
4345 switch (arg
->code ())
4349 /* Allowed pointer conversions are:
4350 (a) pointer to void-pointer conversion. */
4351 if (TYPE_TARGET_TYPE (parm
)->code () == TYPE_CODE_VOID
)
4352 return VOID_PTR_CONVERSION_BADNESS
;
4354 /* (b) pointer to ancestor-pointer conversion. */
4355 rank
.subrank
= distance_to_ancestor (TYPE_TARGET_TYPE (parm
),
4356 TYPE_TARGET_TYPE (arg
),
4358 if (rank
.subrank
>= 0)
4359 return sum_ranks (BASE_PTR_CONVERSION_BADNESS
, rank
);
4361 return INCOMPATIBLE_TYPE_BADNESS
;
4362 case TYPE_CODE_ARRAY
:
4364 struct type
*t1
= TYPE_TARGET_TYPE (parm
);
4365 struct type
*t2
= TYPE_TARGET_TYPE (arg
);
4367 if (types_equal (t1
, t2
))
4369 /* Make sure they are CV equal. */
4370 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4371 rank
.subrank
|= CV_CONVERSION_CONST
;
4372 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4373 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4374 if (rank
.subrank
!= 0)
4375 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4376 return EXACT_MATCH_BADNESS
;
4378 return INCOMPATIBLE_TYPE_BADNESS
;
4380 case TYPE_CODE_FUNC
:
4381 return rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
);
4383 if (value
!= NULL
&& value_type (value
)->code () == TYPE_CODE_INT
)
4385 if (value_as_long (value
) == 0)
4387 /* Null pointer conversion: allow it to be cast to a pointer.
4388 [4.10.1 of C++ standard draft n3290] */
4389 return NULL_POINTER_CONVERSION_BADNESS
;
4393 /* If type checking is disabled, allow the conversion. */
4394 if (!strict_type_checking
)
4395 return NS_INTEGER_POINTER_CONVERSION_BADNESS
;
4399 case TYPE_CODE_ENUM
:
4400 case TYPE_CODE_FLAGS
:
4401 case TYPE_CODE_CHAR
:
4402 case TYPE_CODE_RANGE
:
4403 case TYPE_CODE_BOOL
:
4405 return INCOMPATIBLE_TYPE_BADNESS
;
4409 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ARRAY. */
4412 rank_one_type_parm_array (struct type
*parm
, struct type
*arg
, struct value
*value
)
4414 switch (arg
->code ())
4417 case TYPE_CODE_ARRAY
:
4418 return rank_one_type (TYPE_TARGET_TYPE (parm
),
4419 TYPE_TARGET_TYPE (arg
), NULL
);
4421 return INCOMPATIBLE_TYPE_BADNESS
;
4425 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FUNC. */
4428 rank_one_type_parm_func (struct type
*parm
, struct type
*arg
, struct value
*value
)
4430 switch (arg
->code ())
4432 case TYPE_CODE_PTR
: /* funcptr -> func */
4433 return rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
);
4435 return INCOMPATIBLE_TYPE_BADNESS
;
4439 /* rank_one_type helper for when PARM's type code is TYPE_CODE_INT. */
4442 rank_one_type_parm_int (struct type
*parm
, struct type
*arg
, struct value
*value
)
4444 switch (arg
->code ())
4447 if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4449 /* Deal with signed, unsigned, and plain chars and
4450 signed and unsigned ints. */
4451 if (parm
->has_no_signedness ())
4453 /* This case only for character types. */
4454 if (arg
->has_no_signedness ())
4455 return EXACT_MATCH_BADNESS
; /* plain char -> plain char */
4456 else /* signed/unsigned char -> plain char */
4457 return INTEGER_CONVERSION_BADNESS
;
4459 else if (parm
->is_unsigned ())
4461 if (arg
->is_unsigned ())
4463 /* unsigned int -> unsigned int, or
4464 unsigned long -> unsigned long */
4465 if (integer_types_same_name_p (parm
->name (),
4467 return EXACT_MATCH_BADNESS
;
4468 else if (integer_types_same_name_p (arg
->name (),
4470 && integer_types_same_name_p (parm
->name (),
4472 /* unsigned int -> unsigned long */
4473 return INTEGER_PROMOTION_BADNESS
;
4475 /* unsigned long -> unsigned int */
4476 return INTEGER_CONVERSION_BADNESS
;
4480 if (integer_types_same_name_p (arg
->name (),
4482 && integer_types_same_name_p (parm
->name (),
4484 /* signed long -> unsigned int */
4485 return INTEGER_CONVERSION_BADNESS
;
4487 /* signed int/long -> unsigned int/long */
4488 return INTEGER_CONVERSION_BADNESS
;
4491 else if (!arg
->has_no_signedness () && !arg
->is_unsigned ())
4493 if (integer_types_same_name_p (parm
->name (),
4495 return EXACT_MATCH_BADNESS
;
4496 else if (integer_types_same_name_p (arg
->name (),
4498 && integer_types_same_name_p (parm
->name (),
4500 return INTEGER_PROMOTION_BADNESS
;
4502 return INTEGER_CONVERSION_BADNESS
;
4505 return INTEGER_CONVERSION_BADNESS
;
4507 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4508 return INTEGER_PROMOTION_BADNESS
;
4510 return INTEGER_CONVERSION_BADNESS
;
4511 case TYPE_CODE_ENUM
:
4512 case TYPE_CODE_FLAGS
:
4513 case TYPE_CODE_CHAR
:
4514 case TYPE_CODE_RANGE
:
4515 case TYPE_CODE_BOOL
:
4516 if (arg
->is_declared_class ())
4517 return INCOMPATIBLE_TYPE_BADNESS
;
4518 return INTEGER_PROMOTION_BADNESS
;
4520 return INT_FLOAT_CONVERSION_BADNESS
;
4522 return NS_POINTER_CONVERSION_BADNESS
;
4524 return INCOMPATIBLE_TYPE_BADNESS
;
4528 /* rank_one_type helper for when PARM's type code is TYPE_CODE_ENUM. */
4531 rank_one_type_parm_enum (struct type
*parm
, struct type
*arg
, struct value
*value
)
4533 switch (arg
->code ())
4536 case TYPE_CODE_CHAR
:
4537 case TYPE_CODE_RANGE
:
4538 case TYPE_CODE_BOOL
:
4539 case TYPE_CODE_ENUM
:
4540 if (parm
->is_declared_class () || arg
->is_declared_class ())
4541 return INCOMPATIBLE_TYPE_BADNESS
;
4542 return INTEGER_CONVERSION_BADNESS
;
4544 return INT_FLOAT_CONVERSION_BADNESS
;
4546 return INCOMPATIBLE_TYPE_BADNESS
;
4550 /* rank_one_type helper for when PARM's type code is TYPE_CODE_CHAR. */
4553 rank_one_type_parm_char (struct type
*parm
, struct type
*arg
, struct value
*value
)
4555 switch (arg
->code ())
4557 case TYPE_CODE_RANGE
:
4558 case TYPE_CODE_BOOL
:
4559 case TYPE_CODE_ENUM
:
4560 if (arg
->is_declared_class ())
4561 return INCOMPATIBLE_TYPE_BADNESS
;
4562 return INTEGER_CONVERSION_BADNESS
;
4564 return INT_FLOAT_CONVERSION_BADNESS
;
4566 if (TYPE_LENGTH (arg
) > TYPE_LENGTH (parm
))
4567 return INTEGER_CONVERSION_BADNESS
;
4568 else if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4569 return INTEGER_PROMOTION_BADNESS
;
4571 case TYPE_CODE_CHAR
:
4572 /* Deal with signed, unsigned, and plain chars for C++ and
4573 with int cases falling through from previous case. */
4574 if (parm
->has_no_signedness ())
4576 if (arg
->has_no_signedness ())
4577 return EXACT_MATCH_BADNESS
;
4579 return INTEGER_CONVERSION_BADNESS
;
4581 else if (parm
->is_unsigned ())
4583 if (arg
->is_unsigned ())
4584 return EXACT_MATCH_BADNESS
;
4586 return INTEGER_PROMOTION_BADNESS
;
4588 else if (!arg
->has_no_signedness () && !arg
->is_unsigned ())
4589 return EXACT_MATCH_BADNESS
;
4591 return INTEGER_CONVERSION_BADNESS
;
4593 return INCOMPATIBLE_TYPE_BADNESS
;
4597 /* rank_one_type helper for when PARM's type code is TYPE_CODE_RANGE. */
4600 rank_one_type_parm_range (struct type
*parm
, struct type
*arg
, struct value
*value
)
4602 switch (arg
->code ())
4605 case TYPE_CODE_CHAR
:
4606 case TYPE_CODE_RANGE
:
4607 case TYPE_CODE_BOOL
:
4608 case TYPE_CODE_ENUM
:
4609 return INTEGER_CONVERSION_BADNESS
;
4611 return INT_FLOAT_CONVERSION_BADNESS
;
4613 return INCOMPATIBLE_TYPE_BADNESS
;
4617 /* rank_one_type helper for when PARM's type code is TYPE_CODE_BOOL. */
4620 rank_one_type_parm_bool (struct type
*parm
, struct type
*arg
, struct value
*value
)
4622 switch (arg
->code ())
4624 /* n3290 draft, section 4.12.1 (conv.bool):
4626 "A prvalue of arithmetic, unscoped enumeration, pointer, or
4627 pointer to member type can be converted to a prvalue of type
4628 bool. A zero value, null pointer value, or null member pointer
4629 value is converted to false; any other value is converted to
4630 true. A prvalue of type std::nullptr_t can be converted to a
4631 prvalue of type bool; the resulting value is false." */
4633 case TYPE_CODE_CHAR
:
4634 case TYPE_CODE_ENUM
:
4636 case TYPE_CODE_MEMBERPTR
:
4638 return BOOL_CONVERSION_BADNESS
;
4639 case TYPE_CODE_RANGE
:
4640 return INCOMPATIBLE_TYPE_BADNESS
;
4641 case TYPE_CODE_BOOL
:
4642 return EXACT_MATCH_BADNESS
;
4644 return INCOMPATIBLE_TYPE_BADNESS
;
4648 /* rank_one_type helper for when PARM's type code is TYPE_CODE_FLOAT. */
4651 rank_one_type_parm_float (struct type
*parm
, struct type
*arg
, struct value
*value
)
4653 switch (arg
->code ())
4656 if (TYPE_LENGTH (arg
) < TYPE_LENGTH (parm
))
4657 return FLOAT_PROMOTION_BADNESS
;
4658 else if (TYPE_LENGTH (arg
) == TYPE_LENGTH (parm
))
4659 return EXACT_MATCH_BADNESS
;
4661 return FLOAT_CONVERSION_BADNESS
;
4663 case TYPE_CODE_BOOL
:
4664 case TYPE_CODE_ENUM
:
4665 case TYPE_CODE_RANGE
:
4666 case TYPE_CODE_CHAR
:
4667 return INT_FLOAT_CONVERSION_BADNESS
;
4669 return INCOMPATIBLE_TYPE_BADNESS
;
4673 /* rank_one_type helper for when PARM's type code is TYPE_CODE_COMPLEX. */
4676 rank_one_type_parm_complex (struct type
*parm
, struct type
*arg
, struct value
*value
)
4678 switch (arg
->code ())
4679 { /* Strictly not needed for C++, but... */
4681 return FLOAT_PROMOTION_BADNESS
;
4682 case TYPE_CODE_COMPLEX
:
4683 return EXACT_MATCH_BADNESS
;
4685 return INCOMPATIBLE_TYPE_BADNESS
;
4689 /* rank_one_type helper for when PARM's type code is TYPE_CODE_STRUCT. */
4692 rank_one_type_parm_struct (struct type
*parm
, struct type
*arg
, struct value
*value
)
4694 struct rank rank
= {0, 0};
4696 switch (arg
->code ())
4698 case TYPE_CODE_STRUCT
:
4699 /* Check for derivation */
4700 rank
.subrank
= distance_to_ancestor (parm
, arg
, 0);
4701 if (rank
.subrank
>= 0)
4702 return sum_ranks (BASE_CONVERSION_BADNESS
, rank
);
4705 return INCOMPATIBLE_TYPE_BADNESS
;
4709 /* rank_one_type helper for when PARM's type code is TYPE_CODE_SET. */
4712 rank_one_type_parm_set (struct type
*parm
, struct type
*arg
, struct value
*value
)
4714 switch (arg
->code ())
4718 return rank_one_type (parm
->field (0).type (),
4719 arg
->field (0).type (), NULL
);
4721 return INCOMPATIBLE_TYPE_BADNESS
;
4725 /* Compare one type (PARM) for compatibility with another (ARG).
4726 * PARM is intended to be the parameter type of a function; and
4727 * ARG is the supplied argument's type. This function tests if
4728 * the latter can be converted to the former.
4729 * VALUE is the argument's value or NULL if none (or called recursively)
4731 * Return 0 if they are identical types;
4732 * Otherwise, return an integer which corresponds to how compatible
4733 * PARM is to ARG. The higher the return value, the worse the match.
4734 * Generally the "bad" conversions are all uniformly assigned a 100. */
4737 rank_one_type (struct type
*parm
, struct type
*arg
, struct value
*value
)
4739 struct rank rank
= {0,0};
4741 /* Resolve typedefs */
4742 if (parm
->code () == TYPE_CODE_TYPEDEF
)
4743 parm
= check_typedef (parm
);
4744 if (arg
->code () == TYPE_CODE_TYPEDEF
)
4745 arg
= check_typedef (arg
);
4747 if (TYPE_IS_REFERENCE (parm
) && value
!= NULL
)
4749 if (VALUE_LVAL (value
) == not_lval
)
4751 /* Rvalues should preferably bind to rvalue references or const
4752 lvalue references. */
4753 if (parm
->code () == TYPE_CODE_RVALUE_REF
)
4754 rank
.subrank
= REFERENCE_CONVERSION_RVALUE
;
4755 else if (TYPE_CONST (TYPE_TARGET_TYPE (parm
)))
4756 rank
.subrank
= REFERENCE_CONVERSION_CONST_LVALUE
;
4758 return INCOMPATIBLE_TYPE_BADNESS
;
4759 return sum_ranks (rank
, REFERENCE_CONVERSION_BADNESS
);
4763 /* It's illegal to pass an lvalue as an rvalue. */
4764 if (parm
->code () == TYPE_CODE_RVALUE_REF
)
4765 return INCOMPATIBLE_TYPE_BADNESS
;
4769 if (types_equal (parm
, arg
))
4771 struct type
*t1
= parm
;
4772 struct type
*t2
= arg
;
4774 /* For pointers and references, compare target type. */
4775 if (parm
->is_pointer_or_reference ())
4777 t1
= TYPE_TARGET_TYPE (parm
);
4778 t2
= TYPE_TARGET_TYPE (arg
);
4781 /* Make sure they are CV equal, too. */
4782 if (TYPE_CONST (t1
) != TYPE_CONST (t2
))
4783 rank
.subrank
|= CV_CONVERSION_CONST
;
4784 if (TYPE_VOLATILE (t1
) != TYPE_VOLATILE (t2
))
4785 rank
.subrank
|= CV_CONVERSION_VOLATILE
;
4786 if (rank
.subrank
!= 0)
4787 return sum_ranks (CV_CONVERSION_BADNESS
, rank
);
4788 return EXACT_MATCH_BADNESS
;
4791 /* See through references, since we can almost make non-references
4794 if (TYPE_IS_REFERENCE (arg
))
4795 return (sum_ranks (rank_one_type (parm
, TYPE_TARGET_TYPE (arg
), NULL
),
4796 REFERENCE_SEE_THROUGH_BADNESS
));
4797 if (TYPE_IS_REFERENCE (parm
))
4798 return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm
), arg
, NULL
),
4799 REFERENCE_SEE_THROUGH_BADNESS
));
4802 /* Debugging only. */
4803 fprintf_filtered (gdb_stderr
,
4804 "------ Arg is %s [%d], parm is %s [%d]\n",
4805 arg
->name (), arg
->code (),
4806 parm
->name (), parm
->code ());
4809 /* x -> y means arg of type x being supplied for parameter of type y. */
4811 switch (parm
->code ())
4814 return rank_one_type_parm_ptr (parm
, arg
, value
);
4815 case TYPE_CODE_ARRAY
:
4816 return rank_one_type_parm_array (parm
, arg
, value
);
4817 case TYPE_CODE_FUNC
:
4818 return rank_one_type_parm_func (parm
, arg
, value
);
4820 return rank_one_type_parm_int (parm
, arg
, value
);
4821 case TYPE_CODE_ENUM
:
4822 return rank_one_type_parm_enum (parm
, arg
, value
);
4823 case TYPE_CODE_CHAR
:
4824 return rank_one_type_parm_char (parm
, arg
, value
);
4825 case TYPE_CODE_RANGE
:
4826 return rank_one_type_parm_range (parm
, arg
, value
);
4827 case TYPE_CODE_BOOL
:
4828 return rank_one_type_parm_bool (parm
, arg
, value
);
4830 return rank_one_type_parm_float (parm
, arg
, value
);
4831 case TYPE_CODE_COMPLEX
:
4832 return rank_one_type_parm_complex (parm
, arg
, value
);
4833 case TYPE_CODE_STRUCT
:
4834 return rank_one_type_parm_struct (parm
, arg
, value
);
4836 return rank_one_type_parm_set (parm
, arg
, value
);
4838 return INCOMPATIBLE_TYPE_BADNESS
;
4839 } /* switch (arg->code ()) */
4842 /* End of functions for overload resolution. */
4844 /* Routines to pretty-print types. */
4847 print_bit_vector (B_TYPE
*bits
, int nbits
)
4851 for (bitno
= 0; bitno
< nbits
; bitno
++)
4853 if ((bitno
% 8) == 0)
4855 puts_filtered (" ");
4857 if (B_TST (bits
, bitno
))
4858 printf_filtered (("1"));
4860 printf_filtered (("0"));
4864 /* Note the first arg should be the "this" pointer, we may not want to
4865 include it since we may get into a infinitely recursive
4869 print_args (struct field
*args
, int nargs
, int spaces
)
4875 for (i
= 0; i
< nargs
; i
++)
4878 ("%*s[%d] name '%s'\n", spaces
, "", i
,
4879 args
[i
].name () != NULL
? args
[i
].name () : "<NULL>");
4880 recursive_dump_type (args
[i
].type (), spaces
+ 2);
4886 field_is_static (struct field
*f
)
4888 /* "static" fields are the fields whose location is not relative
4889 to the address of the enclosing struct. It would be nice to
4890 have a dedicated flag that would be set for static fields when
4891 the type is being created. But in practice, checking the field
4892 loc_kind should give us an accurate answer. */
4893 return (f
->loc_kind () == FIELD_LOC_KIND_PHYSNAME
4894 || f
->loc_kind () == FIELD_LOC_KIND_PHYSADDR
);
4898 dump_fn_fieldlists (struct type
*type
, int spaces
)
4904 printf_filtered ("%*sfn_fieldlists %s\n", spaces
, "",
4905 host_address_to_string (TYPE_FN_FIELDLISTS (type
)));
4906 for (method_idx
= 0; method_idx
< TYPE_NFN_FIELDS (type
); method_idx
++)
4908 f
= TYPE_FN_FIELDLIST1 (type
, method_idx
);
4910 ("%*s[%d] name '%s' (%s) length %d\n", spaces
+ 2, "",
4912 TYPE_FN_FIELDLIST_NAME (type
, method_idx
),
4913 host_address_to_string (TYPE_FN_FIELDLIST_NAME (type
, method_idx
)),
4914 TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
));
4915 for (overload_idx
= 0;
4916 overload_idx
< TYPE_FN_FIELDLIST_LENGTH (type
, method_idx
);
4920 ("%*s[%d] physname '%s' (%s)\n",
4921 spaces
+ 4, "", overload_idx
,
4922 TYPE_FN_FIELD_PHYSNAME (f
, overload_idx
),
4923 host_address_to_string (TYPE_FN_FIELD_PHYSNAME (f
,
4926 ("%*stype %s\n", spaces
+ 8, "",
4927 host_address_to_string (TYPE_FN_FIELD_TYPE (f
, overload_idx
)));
4929 recursive_dump_type (TYPE_FN_FIELD_TYPE (f
, overload_idx
),
4933 ("%*sargs %s\n", spaces
+ 8, "",
4934 host_address_to_string (TYPE_FN_FIELD_ARGS (f
, overload_idx
)));
4935 print_args (TYPE_FN_FIELD_ARGS (f
, overload_idx
),
4936 TYPE_FN_FIELD_TYPE (f
, overload_idx
)->num_fields (),
4939 ("%*sfcontext %s\n", spaces
+ 8, "",
4940 host_address_to_string (TYPE_FN_FIELD_FCONTEXT (f
,
4943 printf_filtered ("%*sis_const %d\n", spaces
+ 8, "",
4944 TYPE_FN_FIELD_CONST (f
, overload_idx
));
4945 printf_filtered ("%*sis_volatile %d\n", spaces
+ 8, "",
4946 TYPE_FN_FIELD_VOLATILE (f
, overload_idx
));
4947 printf_filtered ("%*sis_private %d\n", spaces
+ 8, "",
4948 TYPE_FN_FIELD_PRIVATE (f
, overload_idx
));
4949 printf_filtered ("%*sis_protected %d\n", spaces
+ 8, "",
4950 TYPE_FN_FIELD_PROTECTED (f
, overload_idx
));
4951 printf_filtered ("%*sis_stub %d\n", spaces
+ 8, "",
4952 TYPE_FN_FIELD_STUB (f
, overload_idx
));
4953 printf_filtered ("%*sdefaulted %d\n", spaces
+ 8, "",
4954 TYPE_FN_FIELD_DEFAULTED (f
, overload_idx
));
4955 printf_filtered ("%*sis_deleted %d\n", spaces
+ 8, "",
4956 TYPE_FN_FIELD_DELETED (f
, overload_idx
));
4957 printf_filtered ("%*svoffset %u\n", spaces
+ 8, "",
4958 TYPE_FN_FIELD_VOFFSET (f
, overload_idx
));
4964 print_cplus_stuff (struct type
*type
, int spaces
)
4966 printf_filtered ("%*svptr_fieldno %d\n", spaces
, "",
4967 TYPE_VPTR_FIELDNO (type
));
4968 printf_filtered ("%*svptr_basetype %s\n", spaces
, "",
4969 host_address_to_string (TYPE_VPTR_BASETYPE (type
)));
4970 if (TYPE_VPTR_BASETYPE (type
) != NULL
)
4971 recursive_dump_type (TYPE_VPTR_BASETYPE (type
), spaces
+ 2);
4973 printf_filtered ("%*sn_baseclasses %d\n", spaces
, "",
4974 TYPE_N_BASECLASSES (type
));
4975 printf_filtered ("%*snfn_fields %d\n", spaces
, "",
4976 TYPE_NFN_FIELDS (type
));
4977 if (TYPE_N_BASECLASSES (type
) > 0)
4980 ("%*svirtual_field_bits (%d bits at *%s)",
4981 spaces
, "", TYPE_N_BASECLASSES (type
),
4982 host_address_to_string (TYPE_FIELD_VIRTUAL_BITS (type
)));
4984 print_bit_vector (TYPE_FIELD_VIRTUAL_BITS (type
),
4985 TYPE_N_BASECLASSES (type
));
4986 puts_filtered ("\n");
4988 if (type
->num_fields () > 0)
4990 if (TYPE_FIELD_PRIVATE_BITS (type
) != NULL
)
4993 ("%*sprivate_field_bits (%d bits at *%s)",
4994 spaces
, "", type
->num_fields (),
4995 host_address_to_string (TYPE_FIELD_PRIVATE_BITS (type
)));
4996 print_bit_vector (TYPE_FIELD_PRIVATE_BITS (type
),
4997 type
->num_fields ());
4998 puts_filtered ("\n");
5000 if (TYPE_FIELD_PROTECTED_BITS (type
) != NULL
)
5003 ("%*sprotected_field_bits (%d bits at *%s",
5004 spaces
, "", type
->num_fields (),
5005 host_address_to_string (TYPE_FIELD_PROTECTED_BITS (type
)));
5006 print_bit_vector (TYPE_FIELD_PROTECTED_BITS (type
),
5007 type
->num_fields ());
5008 puts_filtered ("\n");
5011 if (TYPE_NFN_FIELDS (type
) > 0)
5013 dump_fn_fieldlists (type
, spaces
);
5016 printf_filtered ("%*scalling_convention %d\n", spaces
, "",
5017 TYPE_CPLUS_CALLING_CONVENTION (type
));
5020 /* Print the contents of the TYPE's type_specific union, assuming that
5021 its type-specific kind is TYPE_SPECIFIC_GNAT_STUFF. */
5024 print_gnat_stuff (struct type
*type
, int spaces
)
5026 struct type
*descriptive_type
= TYPE_DESCRIPTIVE_TYPE (type
);
5028 if (descriptive_type
== NULL
)
5029 printf_filtered ("%*sno descriptive type\n", spaces
+ 2, "");
5032 printf_filtered ("%*sdescriptive type\n", spaces
+ 2, "");
5033 recursive_dump_type (descriptive_type
, spaces
+ 4);
5037 /* Print the contents of the TYPE's type_specific union, assuming that
5038 its type-specific kind is TYPE_SPECIFIC_FIXED_POINT. */
5041 print_fixed_point_type_info (struct type
*type
, int spaces
)
5043 printf_filtered ("%*sscaling factor: %s\n", spaces
+ 2, "",
5044 type
->fixed_point_scaling_factor ().str ().c_str ());
5047 static struct obstack dont_print_type_obstack
;
5049 /* Print the dynamic_prop PROP. */
5052 dump_dynamic_prop (dynamic_prop
const& prop
)
5054 switch (prop
.kind ())
5057 printf_filtered ("%s", plongest (prop
.const_val ()));
5059 case PROP_UNDEFINED
:
5060 printf_filtered ("(undefined)");
5064 printf_filtered ("(dynamic)");
5067 gdb_assert_not_reached ("unhandled prop kind");
5073 recursive_dump_type (struct type
*type
, int spaces
)
5078 obstack_begin (&dont_print_type_obstack
, 0);
5080 if (type
->num_fields () > 0
5081 || (HAVE_CPLUS_STRUCT (type
) && TYPE_NFN_FIELDS (type
) > 0))
5083 struct type
**first_dont_print
5084 = (struct type
**) obstack_base (&dont_print_type_obstack
);
5086 int i
= (struct type
**)
5087 obstack_next_free (&dont_print_type_obstack
) - first_dont_print
;
5091 if (type
== first_dont_print
[i
])
5093 printf_filtered ("%*stype node %s", spaces
, "",
5094 host_address_to_string (type
));
5095 printf_filtered (_(" <same as already seen type>\n"));
5100 obstack_ptr_grow (&dont_print_type_obstack
, type
);
5103 printf_filtered ("%*stype node %s\n", spaces
, "",
5104 host_address_to_string (type
));
5105 printf_filtered ("%*sname '%s' (%s)\n", spaces
, "",
5106 type
->name () ? type
->name () : "<NULL>",
5107 host_address_to_string (type
->name ()));
5108 printf_filtered ("%*scode 0x%x ", spaces
, "", type
->code ());
5109 switch (type
->code ())
5111 case TYPE_CODE_UNDEF
:
5112 printf_filtered ("(TYPE_CODE_UNDEF)");
5115 printf_filtered ("(TYPE_CODE_PTR)");
5117 case TYPE_CODE_ARRAY
:
5118 printf_filtered ("(TYPE_CODE_ARRAY)");
5120 case TYPE_CODE_STRUCT
:
5121 printf_filtered ("(TYPE_CODE_STRUCT)");
5123 case TYPE_CODE_UNION
:
5124 printf_filtered ("(TYPE_CODE_UNION)");
5126 case TYPE_CODE_ENUM
:
5127 printf_filtered ("(TYPE_CODE_ENUM)");
5129 case TYPE_CODE_FLAGS
:
5130 printf_filtered ("(TYPE_CODE_FLAGS)");
5132 case TYPE_CODE_FUNC
:
5133 printf_filtered ("(TYPE_CODE_FUNC)");
5136 printf_filtered ("(TYPE_CODE_INT)");
5139 printf_filtered ("(TYPE_CODE_FLT)");
5141 case TYPE_CODE_VOID
:
5142 printf_filtered ("(TYPE_CODE_VOID)");
5145 printf_filtered ("(TYPE_CODE_SET)");
5147 case TYPE_CODE_RANGE
:
5148 printf_filtered ("(TYPE_CODE_RANGE)");
5150 case TYPE_CODE_STRING
:
5151 printf_filtered ("(TYPE_CODE_STRING)");
5153 case TYPE_CODE_ERROR
:
5154 printf_filtered ("(TYPE_CODE_ERROR)");
5156 case TYPE_CODE_MEMBERPTR
:
5157 printf_filtered ("(TYPE_CODE_MEMBERPTR)");
5159 case TYPE_CODE_METHODPTR
:
5160 printf_filtered ("(TYPE_CODE_METHODPTR)");
5162 case TYPE_CODE_METHOD
:
5163 printf_filtered ("(TYPE_CODE_METHOD)");
5166 printf_filtered ("(TYPE_CODE_REF)");
5168 case TYPE_CODE_CHAR
:
5169 printf_filtered ("(TYPE_CODE_CHAR)");
5171 case TYPE_CODE_BOOL
:
5172 printf_filtered ("(TYPE_CODE_BOOL)");
5174 case TYPE_CODE_COMPLEX
:
5175 printf_filtered ("(TYPE_CODE_COMPLEX)");
5177 case TYPE_CODE_TYPEDEF
:
5178 printf_filtered ("(TYPE_CODE_TYPEDEF)");
5180 case TYPE_CODE_NAMESPACE
:
5181 printf_filtered ("(TYPE_CODE_NAMESPACE)");
5183 case TYPE_CODE_FIXED_POINT
:
5184 printf_filtered ("(TYPE_CODE_FIXED_POINT)");
5187 printf_filtered ("(UNKNOWN TYPE CODE)");
5190 puts_filtered ("\n");
5191 printf_filtered ("%*slength %s\n", spaces
, "",
5192 pulongest (TYPE_LENGTH (type
)));
5193 if (type
->is_objfile_owned ())
5194 printf_filtered ("%*sobjfile %s\n", spaces
, "",
5195 host_address_to_string (type
->objfile_owner ()));
5197 printf_filtered ("%*sgdbarch %s\n", spaces
, "",
5198 host_address_to_string (type
->arch_owner ()));
5199 printf_filtered ("%*starget_type %s\n", spaces
, "",
5200 host_address_to_string (TYPE_TARGET_TYPE (type
)));
5201 if (TYPE_TARGET_TYPE (type
) != NULL
)
5203 recursive_dump_type (TYPE_TARGET_TYPE (type
), spaces
+ 2);
5205 printf_filtered ("%*spointer_type %s\n", spaces
, "",
5206 host_address_to_string (TYPE_POINTER_TYPE (type
)));
5207 printf_filtered ("%*sreference_type %s\n", spaces
, "",
5208 host_address_to_string (TYPE_REFERENCE_TYPE (type
)));
5209 printf_filtered ("%*stype_chain %s\n", spaces
, "",
5210 host_address_to_string (TYPE_CHAIN (type
)));
5211 printf_filtered ("%*sinstance_flags 0x%x", spaces
, "",
5212 (unsigned) type
->instance_flags ());
5213 if (TYPE_CONST (type
))
5215 puts_filtered (" TYPE_CONST");
5217 if (TYPE_VOLATILE (type
))
5219 puts_filtered (" TYPE_VOLATILE");
5221 if (TYPE_CODE_SPACE (type
))
5223 puts_filtered (" TYPE_CODE_SPACE");
5225 if (TYPE_DATA_SPACE (type
))
5227 puts_filtered (" TYPE_DATA_SPACE");
5229 if (TYPE_ADDRESS_CLASS_1 (type
))
5231 puts_filtered (" TYPE_ADDRESS_CLASS_1");
5233 if (TYPE_ADDRESS_CLASS_2 (type
))
5235 puts_filtered (" TYPE_ADDRESS_CLASS_2");
5237 if (TYPE_RESTRICT (type
))
5239 puts_filtered (" TYPE_RESTRICT");
5241 if (TYPE_ATOMIC (type
))
5243 puts_filtered (" TYPE_ATOMIC");
5245 puts_filtered ("\n");
5247 printf_filtered ("%*sflags", spaces
, "");
5248 if (type
->is_unsigned ())
5250 puts_filtered (" TYPE_UNSIGNED");
5252 if (type
->has_no_signedness ())
5254 puts_filtered (" TYPE_NOSIGN");
5256 if (type
->endianity_is_not_default ())
5258 puts_filtered (" TYPE_ENDIANITY_NOT_DEFAULT");
5260 if (type
->is_stub ())
5262 puts_filtered (" TYPE_STUB");
5264 if (type
->target_is_stub ())
5266 puts_filtered (" TYPE_TARGET_STUB");
5268 if (type
->is_prototyped ())
5270 puts_filtered (" TYPE_PROTOTYPED");
5272 if (type
->has_varargs ())
5274 puts_filtered (" TYPE_VARARGS");
5276 /* This is used for things like AltiVec registers on ppc. Gcc emits
5277 an attribute for the array type, which tells whether or not we
5278 have a vector, instead of a regular array. */
5279 if (type
->is_vector ())
5281 puts_filtered (" TYPE_VECTOR");
5283 if (type
->is_fixed_instance ())
5285 puts_filtered (" TYPE_FIXED_INSTANCE");
5287 if (type
->stub_is_supported ())
5289 puts_filtered (" TYPE_STUB_SUPPORTED");
5291 if (TYPE_NOTTEXT (type
))
5293 puts_filtered (" TYPE_NOTTEXT");
5295 puts_filtered ("\n");
5296 printf_filtered ("%*snfields %d ", spaces
, "", type
->num_fields ());
5297 if (TYPE_ASSOCIATED_PROP (type
) != nullptr
5298 || TYPE_ALLOCATED_PROP (type
) != nullptr)
5300 printf_filtered ("%*s", spaces
, "");
5301 if (TYPE_ASSOCIATED_PROP (type
) != nullptr)
5303 printf_filtered ("associated ");
5304 dump_dynamic_prop (*TYPE_ASSOCIATED_PROP (type
));
5306 if (TYPE_ALLOCATED_PROP (type
) != nullptr)
5308 if (TYPE_ASSOCIATED_PROP (type
) != nullptr)
5309 printf_filtered (" ");
5310 printf_filtered ("allocated ");
5311 dump_dynamic_prop (*TYPE_ALLOCATED_PROP (type
));
5313 printf_filtered ("\n");
5315 printf_filtered ("%s\n", host_address_to_string (type
->fields ()));
5316 for (idx
= 0; idx
< type
->num_fields (); idx
++)
5318 if (type
->code () == TYPE_CODE_ENUM
)
5319 printf_filtered ("%*s[%d] enumval %s type ", spaces
+ 2, "",
5320 idx
, plongest (type
->field (idx
).loc_enumval ()));
5322 printf_filtered ("%*s[%d] bitpos %s bitsize %d type ", spaces
+ 2, "",
5323 idx
, plongest (type
->field (idx
).loc_bitpos ()),
5324 TYPE_FIELD_BITSIZE (type
, idx
));
5325 printf_filtered ("%s name '%s' (%s)\n",
5326 host_address_to_string (type
->field (idx
).type ()),
5327 type
->field (idx
).name () != NULL
5328 ? type
->field (idx
).name ()
5330 host_address_to_string (type
->field (idx
).name ()));
5331 if (type
->field (idx
).type () != NULL
)
5333 recursive_dump_type (type
->field (idx
).type (), spaces
+ 4);
5336 if (type
->code () == TYPE_CODE_RANGE
)
5338 printf_filtered ("%*slow ", spaces
, "");
5339 dump_dynamic_prop (type
->bounds ()->low
);
5340 printf_filtered (" high ");
5341 dump_dynamic_prop (type
->bounds ()->high
);
5342 printf_filtered ("\n");
5345 switch (TYPE_SPECIFIC_FIELD (type
))
5347 case TYPE_SPECIFIC_CPLUS_STUFF
:
5348 printf_filtered ("%*scplus_stuff %s\n", spaces
, "",
5349 host_address_to_string (TYPE_CPLUS_SPECIFIC (type
)));
5350 print_cplus_stuff (type
, spaces
);
5353 case TYPE_SPECIFIC_GNAT_STUFF
:
5354 printf_filtered ("%*sgnat_stuff %s\n", spaces
, "",
5355 host_address_to_string (TYPE_GNAT_SPECIFIC (type
)));
5356 print_gnat_stuff (type
, spaces
);
5359 case TYPE_SPECIFIC_FLOATFORMAT
:
5360 printf_filtered ("%*sfloatformat ", spaces
, "");
5361 if (TYPE_FLOATFORMAT (type
) == NULL
5362 || TYPE_FLOATFORMAT (type
)->name
== NULL
)
5363 puts_filtered ("(null)");
5365 puts_filtered (TYPE_FLOATFORMAT (type
)->name
);
5366 puts_filtered ("\n");
5369 case TYPE_SPECIFIC_FUNC
:
5370 printf_filtered ("%*scalling_convention %d\n", spaces
, "",
5371 TYPE_CALLING_CONVENTION (type
));
5372 /* tail_call_list is not printed. */
5375 case TYPE_SPECIFIC_SELF_TYPE
:
5376 printf_filtered ("%*sself_type %s\n", spaces
, "",
5377 host_address_to_string (TYPE_SELF_TYPE (type
)));
5380 case TYPE_SPECIFIC_FIXED_POINT
:
5381 printf_filtered ("%*sfixed_point_info ", spaces
, "");
5382 print_fixed_point_type_info (type
, spaces
);
5383 puts_filtered ("\n");
5386 case TYPE_SPECIFIC_INT
:
5387 if (type
->bit_size_differs_p ())
5389 unsigned bit_size
= type
->bit_size ();
5390 unsigned bit_off
= type
->bit_offset ();
5391 printf_filtered ("%*s bit size = %u, bit offset = %u\n", spaces
, "",
5398 obstack_free (&dont_print_type_obstack
, NULL
);
5401 /* Trivial helpers for the libiberty hash table, for mapping one
5404 struct type_pair
: public allocate_on_obstack
5406 type_pair (struct type
*old_
, struct type
*newobj_
)
5407 : old (old_
), newobj (newobj_
)
5410 struct type
* const old
, * const newobj
;
5414 type_pair_hash (const void *item
)
5416 const struct type_pair
*pair
= (const struct type_pair
*) item
;
5418 return htab_hash_pointer (pair
->old
);
5422 type_pair_eq (const void *item_lhs
, const void *item_rhs
)
5424 const struct type_pair
*lhs
= (const struct type_pair
*) item_lhs
;
5425 const struct type_pair
*rhs
= (const struct type_pair
*) item_rhs
;
5427 return lhs
->old
== rhs
->old
;
5430 /* Allocate the hash table used by copy_type_recursive to walk
5431 types without duplicates. We use OBJFILE's obstack, because
5432 OBJFILE is about to be deleted. */
5435 create_copied_types_hash (struct objfile
*objfile
)
5437 return htab_up (htab_create_alloc_ex (1, type_pair_hash
, type_pair_eq
,
5438 NULL
, &objfile
->objfile_obstack
,
5439 hashtab_obstack_allocate
,
5440 dummy_obstack_deallocate
));
5443 /* Recursively copy (deep copy) a dynamic attribute list of a type. */
5445 static struct dynamic_prop_list
*
5446 copy_dynamic_prop_list (struct obstack
*objfile_obstack
,
5447 struct dynamic_prop_list
*list
)
5449 struct dynamic_prop_list
*copy
= list
;
5450 struct dynamic_prop_list
**node_ptr
= ©
;
5452 while (*node_ptr
!= NULL
)
5454 struct dynamic_prop_list
*node_copy
;
5456 node_copy
= ((struct dynamic_prop_list
*)
5457 obstack_copy (objfile_obstack
, *node_ptr
,
5458 sizeof (struct dynamic_prop_list
)));
5459 node_copy
->prop
= (*node_ptr
)->prop
;
5460 *node_ptr
= node_copy
;
5462 node_ptr
= &node_copy
->next
;
5468 /* Recursively copy (deep copy) TYPE, if it is associated with
5469 OBJFILE. Return a new type owned by the gdbarch associated with the type, a
5470 saved type if we have already visited TYPE (using COPIED_TYPES), or TYPE if
5471 it is not associated with OBJFILE. */
5474 copy_type_recursive (struct objfile
*objfile
,
5476 htab_t copied_types
)
5479 struct type
*new_type
;
5481 if (!type
->is_objfile_owned ())
5484 /* This type shouldn't be pointing to any types in other objfiles;
5485 if it did, the type might disappear unexpectedly. */
5486 gdb_assert (type
->objfile_owner () == objfile
);
5488 struct type_pair
pair (type
, nullptr);
5490 slot
= htab_find_slot (copied_types
, &pair
, INSERT
);
5492 return ((struct type_pair
*) *slot
)->newobj
;
5494 new_type
= alloc_type_arch (type
->arch ());
5496 /* We must add the new type to the hash table immediately, in case
5497 we encounter this type again during a recursive call below. */
5498 struct type_pair
*stored
5499 = new (&objfile
->objfile_obstack
) struct type_pair (type
, new_type
);
5503 /* Copy the common fields of types. For the main type, we simply
5504 copy the entire thing and then update specific fields as needed. */
5505 *TYPE_MAIN_TYPE (new_type
) = *TYPE_MAIN_TYPE (type
);
5507 new_type
->set_owner (type
->arch ());
5510 new_type
->set_name (xstrdup (type
->name ()));
5512 new_type
->set_instance_flags (type
->instance_flags ());
5513 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5515 /* Copy the fields. */
5516 if (type
->num_fields ())
5520 nfields
= type
->num_fields ();
5521 new_type
->set_fields
5523 TYPE_ZALLOC (new_type
, nfields
* sizeof (struct field
)));
5525 for (i
= 0; i
< nfields
; i
++)
5527 TYPE_FIELD_ARTIFICIAL (new_type
, i
) =
5528 TYPE_FIELD_ARTIFICIAL (type
, i
);
5529 TYPE_FIELD_BITSIZE (new_type
, i
) = TYPE_FIELD_BITSIZE (type
, i
);
5530 if (type
->field (i
).type ())
5531 new_type
->field (i
).set_type
5532 (copy_type_recursive (objfile
, type
->field (i
).type (),
5534 if (type
->field (i
).name ())
5535 new_type
->field (i
).set_name (xstrdup (type
->field (i
).name ()));
5537 switch (type
->field (i
).loc_kind ())
5539 case FIELD_LOC_KIND_BITPOS
:
5540 new_type
->field (i
).set_loc_bitpos (type
->field (i
).loc_bitpos ());
5542 case FIELD_LOC_KIND_ENUMVAL
:
5543 new_type
->field (i
).set_loc_enumval (type
->field (i
).loc_enumval ());
5545 case FIELD_LOC_KIND_PHYSADDR
:
5546 new_type
->field (i
).set_loc_physaddr
5547 (type
->field (i
).loc_physaddr ());
5549 case FIELD_LOC_KIND_PHYSNAME
:
5550 new_type
->field (i
).set_loc_physname
5551 (xstrdup (type
->field (i
).loc_physname ()));
5553 case FIELD_LOC_KIND_DWARF_BLOCK
:
5554 new_type
->field (i
).set_loc_dwarf_block
5555 (type
->field (i
).loc_dwarf_block ());
5558 internal_error (__FILE__
, __LINE__
,
5559 _("Unexpected type field location kind: %d"),
5560 type
->field (i
).loc_kind ());
5565 /* For range types, copy the bounds information. */
5566 if (type
->code () == TYPE_CODE_RANGE
)
5568 range_bounds
*bounds
5569 = ((struct range_bounds
*) TYPE_ALLOC
5570 (new_type
, sizeof (struct range_bounds
)));
5572 *bounds
= *type
->bounds ();
5573 new_type
->set_bounds (bounds
);
5576 if (type
->main_type
->dyn_prop_list
!= NULL
)
5577 new_type
->main_type
->dyn_prop_list
5578 = copy_dynamic_prop_list (&objfile
->objfile_obstack
,
5579 type
->main_type
->dyn_prop_list
);
5582 /* Copy pointers to other types. */
5583 if (TYPE_TARGET_TYPE (type
))
5584 TYPE_TARGET_TYPE (new_type
) =
5585 copy_type_recursive (objfile
,
5586 TYPE_TARGET_TYPE (type
),
5589 /* Maybe copy the type_specific bits.
5591 NOTE drow/2005-12-09: We do not copy the C++-specific bits like
5592 base classes and methods. There's no fundamental reason why we
5593 can't, but at the moment it is not needed. */
5595 switch (TYPE_SPECIFIC_FIELD (type
))
5597 case TYPE_SPECIFIC_NONE
:
5599 case TYPE_SPECIFIC_FUNC
:
5600 INIT_FUNC_SPECIFIC (new_type
);
5601 TYPE_CALLING_CONVENTION (new_type
) = TYPE_CALLING_CONVENTION (type
);
5602 TYPE_NO_RETURN (new_type
) = TYPE_NO_RETURN (type
);
5603 TYPE_TAIL_CALL_LIST (new_type
) = NULL
;
5605 case TYPE_SPECIFIC_FLOATFORMAT
:
5606 TYPE_FLOATFORMAT (new_type
) = TYPE_FLOATFORMAT (type
);
5608 case TYPE_SPECIFIC_CPLUS_STUFF
:
5609 INIT_CPLUS_SPECIFIC (new_type
);
5611 case TYPE_SPECIFIC_GNAT_STUFF
:
5612 INIT_GNAT_SPECIFIC (new_type
);
5614 case TYPE_SPECIFIC_SELF_TYPE
:
5615 set_type_self_type (new_type
,
5616 copy_type_recursive (objfile
, TYPE_SELF_TYPE (type
),
5619 case TYPE_SPECIFIC_FIXED_POINT
:
5620 INIT_FIXED_POINT_SPECIFIC (new_type
);
5621 new_type
->fixed_point_info ().scaling_factor
5622 = type
->fixed_point_info ().scaling_factor
;
5624 case TYPE_SPECIFIC_INT
:
5625 TYPE_SPECIFIC_FIELD (new_type
) = TYPE_SPECIFIC_INT
;
5626 TYPE_MAIN_TYPE (new_type
)->type_specific
.int_stuff
5627 = TYPE_MAIN_TYPE (type
)->type_specific
.int_stuff
;
5631 gdb_assert_not_reached ("bad type_specific_kind");
5637 /* Make a copy of the given TYPE, except that the pointer & reference
5638 types are not preserved.
5640 This function assumes that the given type has an associated objfile.
5641 This objfile is used to allocate the new type. */
5644 copy_type (const struct type
*type
)
5646 struct type
*new_type
;
5648 gdb_assert (type
->is_objfile_owned ());
5650 new_type
= alloc_type_copy (type
);
5651 new_type
->set_instance_flags (type
->instance_flags ());
5652 TYPE_LENGTH (new_type
) = TYPE_LENGTH (type
);
5653 memcpy (TYPE_MAIN_TYPE (new_type
), TYPE_MAIN_TYPE (type
),
5654 sizeof (struct main_type
));
5655 if (type
->main_type
->dyn_prop_list
!= NULL
)
5656 new_type
->main_type
->dyn_prop_list
5657 = copy_dynamic_prop_list (&type
->objfile_owner ()->objfile_obstack
,
5658 type
->main_type
->dyn_prop_list
);
5663 /* Helper functions to initialize architecture-specific types. */
5665 /* Allocate a type structure associated with GDBARCH and set its
5666 CODE, LENGTH, and NAME fields. */
5669 arch_type (struct gdbarch
*gdbarch
,
5670 enum type_code code
, int bit
, const char *name
)
5674 type
= alloc_type_arch (gdbarch
);
5675 set_type_code (type
, code
);
5676 gdb_assert ((bit
% TARGET_CHAR_BIT
) == 0);
5677 TYPE_LENGTH (type
) = bit
/ TARGET_CHAR_BIT
;
5680 type
->set_name (gdbarch_obstack_strdup (gdbarch
, name
));
5685 /* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
5686 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5687 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5690 arch_integer_type (struct gdbarch
*gdbarch
,
5691 int bit
, int unsigned_p
, const char *name
)
5695 t
= arch_type (gdbarch
, TYPE_CODE_INT
, bit
, name
);
5697 t
->set_is_unsigned (true);
5702 /* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
5703 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5704 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5707 arch_character_type (struct gdbarch
*gdbarch
,
5708 int bit
, int unsigned_p
, const char *name
)
5712 t
= arch_type (gdbarch
, TYPE_CODE_CHAR
, bit
, name
);
5714 t
->set_is_unsigned (true);
5719 /* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
5720 BIT is the type size in bits. If UNSIGNED_P is non-zero, set
5721 the type's TYPE_UNSIGNED flag. NAME is the type name. */
5724 arch_boolean_type (struct gdbarch
*gdbarch
,
5725 int bit
, int unsigned_p
, const char *name
)
5729 t
= arch_type (gdbarch
, TYPE_CODE_BOOL
, bit
, name
);
5731 t
->set_is_unsigned (true);
5736 /* Allocate a TYPE_CODE_FLT type structure associated with GDBARCH.
5737 BIT is the type size in bits; if BIT equals -1, the size is
5738 determined by the floatformat. NAME is the type name. Set the
5739 TYPE_FLOATFORMAT from FLOATFORMATS. */
5742 arch_float_type (struct gdbarch
*gdbarch
,
5743 int bit
, const char *name
,
5744 const struct floatformat
**floatformats
)
5746 const struct floatformat
*fmt
= floatformats
[gdbarch_byte_order (gdbarch
)];
5749 bit
= verify_floatformat (bit
, fmt
);
5750 t
= arch_type (gdbarch
, TYPE_CODE_FLT
, bit
, name
);
5751 TYPE_FLOATFORMAT (t
) = fmt
;
5756 /* Allocate a TYPE_CODE_DECFLOAT type structure associated with GDBARCH.
5757 BIT is the type size in bits. NAME is the type name. */
5760 arch_decfloat_type (struct gdbarch
*gdbarch
, int bit
, const char *name
)
5764 t
= arch_type (gdbarch
, TYPE_CODE_DECFLOAT
, bit
, name
);
5768 /* Allocate a TYPE_CODE_PTR type structure associated with GDBARCH.
5769 BIT is the pointer type size in bits. NAME is the type name.
5770 TARGET_TYPE is the pointer target type. Always sets the pointer type's
5771 TYPE_UNSIGNED flag. */
5774 arch_pointer_type (struct gdbarch
*gdbarch
,
5775 int bit
, const char *name
, struct type
*target_type
)
5779 t
= arch_type (gdbarch
, TYPE_CODE_PTR
, bit
, name
);
5780 TYPE_TARGET_TYPE (t
) = target_type
;
5781 t
->set_is_unsigned (true);
5785 /* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
5786 NAME is the type name. BIT is the size of the flag word in bits. */
5789 arch_flags_type (struct gdbarch
*gdbarch
, const char *name
, int bit
)
5793 type
= arch_type (gdbarch
, TYPE_CODE_FLAGS
, bit
, name
);
5794 type
->set_is_unsigned (true);
5795 type
->set_num_fields (0);
5796 /* Pre-allocate enough space assuming every field is one bit. */
5798 ((struct field
*) TYPE_ZALLOC (type
, bit
* sizeof (struct field
)));
5803 /* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5804 position BITPOS is called NAME. Pass NAME as "" for fields that
5805 should not be printed. */
5808 append_flags_type_field (struct type
*type
, int start_bitpos
, int nr_bits
,
5809 struct type
*field_type
, const char *name
)
5811 int type_bitsize
= TYPE_LENGTH (type
) * TARGET_CHAR_BIT
;
5812 int field_nr
= type
->num_fields ();
5814 gdb_assert (type
->code () == TYPE_CODE_FLAGS
);
5815 gdb_assert (type
->num_fields () + 1 <= type_bitsize
);
5816 gdb_assert (start_bitpos
>= 0 && start_bitpos
< type_bitsize
);
5817 gdb_assert (nr_bits
>= 1 && (start_bitpos
+ nr_bits
) <= type_bitsize
);
5818 gdb_assert (name
!= NULL
);
5820 type
->set_num_fields (type
->num_fields () + 1);
5821 type
->field (field_nr
).set_name (xstrdup (name
));
5822 type
->field (field_nr
).set_type (field_type
);
5823 type
->field (field_nr
).set_loc_bitpos (start_bitpos
);
5824 TYPE_FIELD_BITSIZE (type
, field_nr
) = nr_bits
;
5827 /* Special version of append_flags_type_field to add a flag field.
5828 Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
5829 position BITPOS is called NAME. */
5832 append_flags_type_flag (struct type
*type
, int bitpos
, const char *name
)
5834 append_flags_type_field (type
, bitpos
, 1,
5835 builtin_type (type
->arch ())->builtin_bool
,
5839 /* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
5840 specified by CODE) associated with GDBARCH. NAME is the type name. */
5843 arch_composite_type (struct gdbarch
*gdbarch
, const char *name
,
5844 enum type_code code
)
5848 gdb_assert (code
== TYPE_CODE_STRUCT
|| code
== TYPE_CODE_UNION
);
5849 t
= arch_type (gdbarch
, code
, 0, NULL
);
5851 INIT_CPLUS_SPECIFIC (t
);
5855 /* Add new field with name NAME and type FIELD to composite type T.
5856 Do not set the field's position or adjust the type's length;
5857 the caller should do so. Return the new field. */
5860 append_composite_type_field_raw (struct type
*t
, const char *name
,
5865 t
->set_num_fields (t
->num_fields () + 1);
5866 t
->set_fields (XRESIZEVEC (struct field
, t
->fields (),
5868 f
= &t
->field (t
->num_fields () - 1);
5869 memset (f
, 0, sizeof f
[0]);
5870 f
[0].set_type (field
);
5871 f
[0].set_name (name
);
5875 /* Add new field with name NAME and type FIELD to composite type T.
5876 ALIGNMENT (if non-zero) specifies the minimum field alignment. */
5879 append_composite_type_field_aligned (struct type
*t
, const char *name
,
5880 struct type
*field
, int alignment
)
5882 struct field
*f
= append_composite_type_field_raw (t
, name
, field
);
5884 if (t
->code () == TYPE_CODE_UNION
)
5886 if (TYPE_LENGTH (t
) < TYPE_LENGTH (field
))
5887 TYPE_LENGTH (t
) = TYPE_LENGTH (field
);
5889 else if (t
->code () == TYPE_CODE_STRUCT
)
5891 TYPE_LENGTH (t
) = TYPE_LENGTH (t
) + TYPE_LENGTH (field
);
5892 if (t
->num_fields () > 1)
5895 (f
[-1].loc_bitpos () + (TYPE_LENGTH (f
[-1].type ()) * TARGET_CHAR_BIT
));
5901 alignment
*= TARGET_CHAR_BIT
;
5902 left
= f
[0].loc_bitpos () % alignment
;
5906 f
->set_loc_bitpos (f
[0].loc_bitpos () + (alignment
- left
));
5907 TYPE_LENGTH (t
) += (alignment
- left
) / TARGET_CHAR_BIT
;
5914 /* Add new field with name NAME and type FIELD to composite type T. */
5917 append_composite_type_field (struct type
*t
, const char *name
,
5920 append_composite_type_field_aligned (t
, name
, field
, 0);
5925 /* We manage the lifetimes of fixed_point_type_info objects by
5926 attaching them to the objfile. Currently, these objects are
5927 modified during construction, and GMP does not provide a way to
5928 hash the contents of an mpq_t; so it's a bit of a pain to hash-cons
5929 them. If we did do this, they could be moved to the per-BFD and
5930 shared across objfiles. */
5931 typedef std::vector
<std::unique_ptr
<fixed_point_type_info
>>
5932 fixed_point_type_storage
;
5934 /* Key used for managing the storage of fixed-point type info. */
5935 static const struct objfile_key
<fixed_point_type_storage
>
5936 fixed_point_objfile_key
;
5938 /* See gdbtypes.h. */
5941 allocate_fixed_point_type_info (struct type
*type
)
5943 std::unique_ptr
<fixed_point_type_info
> up (new fixed_point_type_info
);
5944 fixed_point_type_info
*info
;
5946 if (type
->is_objfile_owned ())
5948 fixed_point_type_storage
*storage
5949 = fixed_point_objfile_key
.get (type
->objfile_owner ());
5950 if (storage
== nullptr)
5951 storage
= fixed_point_objfile_key
.emplace (type
->objfile_owner ());
5953 storage
->push_back (std::move (up
));
5957 /* We just leak the memory, because that's what we do generally
5958 for non-objfile-attached types. */
5959 info
= up
.release ();
5962 type
->set_fixed_point_info (info
);
5965 /* See gdbtypes.h. */
5968 is_fixed_point_type (struct type
*type
)
5970 while (check_typedef (type
)->code () == TYPE_CODE_RANGE
)
5971 type
= TYPE_TARGET_TYPE (check_typedef (type
));
5972 type
= check_typedef (type
);
5974 return type
->code () == TYPE_CODE_FIXED_POINT
;
5977 /* See gdbtypes.h. */
5980 type::fixed_point_type_base_type ()
5982 struct type
*type
= this;
5984 while (check_typedef (type
)->code () == TYPE_CODE_RANGE
)
5985 type
= TYPE_TARGET_TYPE (check_typedef (type
));
5986 type
= check_typedef (type
);
5988 gdb_assert (type
->code () == TYPE_CODE_FIXED_POINT
);
5992 /* See gdbtypes.h. */
5995 type::fixed_point_scaling_factor ()
5997 struct type
*type
= this->fixed_point_type_base_type ();
5999 return type
->fixed_point_info ().scaling_factor
;
6004 static struct gdbarch_data
*gdbtypes_data
;
6006 const struct builtin_type
*
6007 builtin_type (struct gdbarch
*gdbarch
)
6009 return (const struct builtin_type
*) gdbarch_data (gdbarch
, gdbtypes_data
);
6013 gdbtypes_post_init (struct gdbarch
*gdbarch
)
6015 struct builtin_type
*builtin_type
6016 = GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct builtin_type
);
6019 builtin_type
->builtin_void
6020 = arch_type (gdbarch
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
6021 builtin_type
->builtin_char
6022 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
6023 !gdbarch_char_signed (gdbarch
), "char");
6024 builtin_type
->builtin_char
->set_has_no_signedness (true);
6025 builtin_type
->builtin_signed_char
6026 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
6028 builtin_type
->builtin_unsigned_char
6029 = arch_integer_type (gdbarch
, TARGET_CHAR_BIT
,
6030 1, "unsigned char");
6031 builtin_type
->builtin_short
6032 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
6034 builtin_type
->builtin_unsigned_short
6035 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
6036 1, "unsigned short");
6037 builtin_type
->builtin_int
6038 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
6040 builtin_type
->builtin_unsigned_int
6041 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
6043 builtin_type
->builtin_long
6044 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
6046 builtin_type
->builtin_unsigned_long
6047 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
6048 1, "unsigned long");
6049 builtin_type
->builtin_long_long
6050 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
6052 builtin_type
->builtin_unsigned_long_long
6053 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
6054 1, "unsigned long long");
6055 builtin_type
->builtin_half
6056 = arch_float_type (gdbarch
, gdbarch_half_bit (gdbarch
),
6057 "half", gdbarch_half_format (gdbarch
));
6058 builtin_type
->builtin_float
6059 = arch_float_type (gdbarch
, gdbarch_float_bit (gdbarch
),
6060 "float", gdbarch_float_format (gdbarch
));
6061 builtin_type
->builtin_bfloat16
6062 = arch_float_type (gdbarch
, gdbarch_bfloat16_bit (gdbarch
),
6063 "bfloat16", gdbarch_bfloat16_format (gdbarch
));
6064 builtin_type
->builtin_double
6065 = arch_float_type (gdbarch
, gdbarch_double_bit (gdbarch
),
6066 "double", gdbarch_double_format (gdbarch
));
6067 builtin_type
->builtin_long_double
6068 = arch_float_type (gdbarch
, gdbarch_long_double_bit (gdbarch
),
6069 "long double", gdbarch_long_double_format (gdbarch
));
6070 builtin_type
->builtin_complex
6071 = init_complex_type ("complex", builtin_type
->builtin_float
);
6072 builtin_type
->builtin_double_complex
6073 = init_complex_type ("double complex", builtin_type
->builtin_double
);
6074 builtin_type
->builtin_string
6075 = arch_type (gdbarch
, TYPE_CODE_STRING
, TARGET_CHAR_BIT
, "string");
6076 builtin_type
->builtin_bool
6077 = arch_boolean_type (gdbarch
, TARGET_CHAR_BIT
, 1, "bool");
6079 /* The following three are about decimal floating point types, which
6080 are 32-bits, 64-bits and 128-bits respectively. */
6081 builtin_type
->builtin_decfloat
6082 = arch_decfloat_type (gdbarch
, 32, "_Decimal32");
6083 builtin_type
->builtin_decdouble
6084 = arch_decfloat_type (gdbarch
, 64, "_Decimal64");
6085 builtin_type
->builtin_declong
6086 = arch_decfloat_type (gdbarch
, 128, "_Decimal128");
6088 /* "True" character types. */
6089 builtin_type
->builtin_true_char
6090 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 0, "true character");
6091 builtin_type
->builtin_true_unsigned_char
6092 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 1, "true character");
6094 /* Fixed-size integer types. */
6095 builtin_type
->builtin_int0
6096 = arch_integer_type (gdbarch
, 0, 0, "int0_t");
6097 builtin_type
->builtin_int8
6098 = arch_integer_type (gdbarch
, 8, 0, "int8_t");
6099 builtin_type
->builtin_uint8
6100 = arch_integer_type (gdbarch
, 8, 1, "uint8_t");
6101 builtin_type
->builtin_int16
6102 = arch_integer_type (gdbarch
, 16, 0, "int16_t");
6103 builtin_type
->builtin_uint16
6104 = arch_integer_type (gdbarch
, 16, 1, "uint16_t");
6105 builtin_type
->builtin_int24
6106 = arch_integer_type (gdbarch
, 24, 0, "int24_t");
6107 builtin_type
->builtin_uint24
6108 = arch_integer_type (gdbarch
, 24, 1, "uint24_t");
6109 builtin_type
->builtin_int32
6110 = arch_integer_type (gdbarch
, 32, 0, "int32_t");
6111 builtin_type
->builtin_uint32
6112 = arch_integer_type (gdbarch
, 32, 1, "uint32_t");
6113 builtin_type
->builtin_int64
6114 = arch_integer_type (gdbarch
, 64, 0, "int64_t");
6115 builtin_type
->builtin_uint64
6116 = arch_integer_type (gdbarch
, 64, 1, "uint64_t");
6117 builtin_type
->builtin_int128
6118 = arch_integer_type (gdbarch
, 128, 0, "int128_t");
6119 builtin_type
->builtin_uint128
6120 = arch_integer_type (gdbarch
, 128, 1, "uint128_t");
6122 builtin_type
->builtin_int8
->set_instance_flags
6123 (builtin_type
->builtin_int8
->instance_flags ()
6124 | TYPE_INSTANCE_FLAG_NOTTEXT
);
6126 builtin_type
->builtin_uint8
->set_instance_flags
6127 (builtin_type
->builtin_uint8
->instance_flags ()
6128 | TYPE_INSTANCE_FLAG_NOTTEXT
);
6130 /* Wide character types. */
6131 builtin_type
->builtin_char16
6132 = arch_integer_type (gdbarch
, 16, 1, "char16_t");
6133 builtin_type
->builtin_char32
6134 = arch_integer_type (gdbarch
, 32, 1, "char32_t");
6135 builtin_type
->builtin_wchar
6136 = arch_integer_type (gdbarch
, gdbarch_wchar_bit (gdbarch
),
6137 !gdbarch_wchar_signed (gdbarch
), "wchar_t");
6139 /* Default data/code pointer types. */
6140 builtin_type
->builtin_data_ptr
6141 = lookup_pointer_type (builtin_type
->builtin_void
);
6142 builtin_type
->builtin_func_ptr
6143 = lookup_pointer_type (lookup_function_type (builtin_type
->builtin_void
));
6144 builtin_type
->builtin_func_func
6145 = lookup_function_type (builtin_type
->builtin_func_ptr
);
6147 /* This type represents a GDB internal function. */
6148 builtin_type
->internal_fn
6149 = arch_type (gdbarch
, TYPE_CODE_INTERNAL_FUNCTION
, 0,
6150 "<internal function>");
6152 /* This type represents an xmethod. */
6153 builtin_type
->xmethod
6154 = arch_type (gdbarch
, TYPE_CODE_XMETHOD
, 0, "<xmethod>");
6156 return builtin_type
;
6159 /* This set of objfile-based types is intended to be used by symbol
6160 readers as basic types. */
6162 static const struct objfile_key
<struct objfile_type
,
6163 gdb::noop_deleter
<struct objfile_type
>>
6166 const struct objfile_type
*
6167 objfile_type (struct objfile
*objfile
)
6169 struct gdbarch
*gdbarch
;
6170 struct objfile_type
*objfile_type
= objfile_type_data
.get (objfile
);
6173 return objfile_type
;
6175 objfile_type
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
6176 1, struct objfile_type
);
6178 /* Use the objfile architecture to determine basic type properties. */
6179 gdbarch
= objfile
->arch ();
6182 objfile_type
->builtin_void
6183 = init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, "void");
6184 objfile_type
->builtin_char
6185 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
6186 !gdbarch_char_signed (gdbarch
), "char");
6187 objfile_type
->builtin_char
->set_has_no_signedness (true);
6188 objfile_type
->builtin_signed_char
6189 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
6191 objfile_type
->builtin_unsigned_char
6192 = init_integer_type (objfile
, TARGET_CHAR_BIT
,
6193 1, "unsigned char");
6194 objfile_type
->builtin_short
6195 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
6197 objfile_type
->builtin_unsigned_short
6198 = init_integer_type (objfile
, gdbarch_short_bit (gdbarch
),
6199 1, "unsigned short");
6200 objfile_type
->builtin_int
6201 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
6203 objfile_type
->builtin_unsigned_int
6204 = init_integer_type (objfile
, gdbarch_int_bit (gdbarch
),
6206 objfile_type
->builtin_long
6207 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
6209 objfile_type
->builtin_unsigned_long
6210 = init_integer_type (objfile
, gdbarch_long_bit (gdbarch
),
6211 1, "unsigned long");
6212 objfile_type
->builtin_long_long
6213 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
6215 objfile_type
->builtin_unsigned_long_long
6216 = init_integer_type (objfile
, gdbarch_long_long_bit (gdbarch
),
6217 1, "unsigned long long");
6218 objfile_type
->builtin_float
6219 = init_float_type (objfile
, gdbarch_float_bit (gdbarch
),
6220 "float", gdbarch_float_format (gdbarch
));
6221 objfile_type
->builtin_double
6222 = init_float_type (objfile
, gdbarch_double_bit (gdbarch
),
6223 "double", gdbarch_double_format (gdbarch
));
6224 objfile_type
->builtin_long_double
6225 = init_float_type (objfile
, gdbarch_long_double_bit (gdbarch
),
6226 "long double", gdbarch_long_double_format (gdbarch
));
6228 /* This type represents a type that was unrecognized in symbol read-in. */
6229 objfile_type
->builtin_error
6230 = init_type (objfile
, TYPE_CODE_ERROR
, 0, "<unknown type>");
6232 /* The following set of types is used for symbols with no
6233 debug information. */
6234 objfile_type
->nodebug_text_symbol
6235 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
6236 "<text variable, no debug info>");
6238 objfile_type
->nodebug_text_gnu_ifunc_symbol
6239 = init_type (objfile
, TYPE_CODE_FUNC
, TARGET_CHAR_BIT
,
6240 "<text gnu-indirect-function variable, no debug info>");
6241 objfile_type
->nodebug_text_gnu_ifunc_symbol
->set_is_gnu_ifunc (true);
6243 objfile_type
->nodebug_got_plt_symbol
6244 = init_pointer_type (objfile
, gdbarch_addr_bit (gdbarch
),
6245 "<text from jump slot in .got.plt, no debug info>",
6246 objfile_type
->nodebug_text_symbol
);
6247 objfile_type
->nodebug_data_symbol
6248 = init_nodebug_var_type (objfile
, "<data variable, no debug info>");
6249 objfile_type
->nodebug_unknown_symbol
6250 = init_nodebug_var_type (objfile
, "<variable (not text or data), no debug info>");
6251 objfile_type
->nodebug_tls_symbol
6252 = init_nodebug_var_type (objfile
, "<thread local variable, no debug info>");
6254 /* NOTE: on some targets, addresses and pointers are not necessarily
6258 - gdb's `struct type' always describes the target's
6260 - gdb's `struct value' objects should always hold values in
6262 - gdb's CORE_ADDR values are addresses in the unified virtual
6263 address space that the assembler and linker work with. Thus,
6264 since target_read_memory takes a CORE_ADDR as an argument, it
6265 can access any memory on the target, even if the processor has
6266 separate code and data address spaces.
6268 In this context, objfile_type->builtin_core_addr is a bit odd:
6269 it's a target type for a value the target will never see. It's
6270 only used to hold the values of (typeless) linker symbols, which
6271 are indeed in the unified virtual address space. */
6273 objfile_type
->builtin_core_addr
6274 = init_integer_type (objfile
, gdbarch_addr_bit (gdbarch
), 1,
6277 objfile_type_data
.set (objfile
, objfile_type
);
6278 return objfile_type
;
6281 /* See gdbtypes.h. */
6284 call_site::pc () const
6286 compunit_symtab
*cust
= this->per_objfile
->get_symtab (this->per_cu
);
6288 = this->per_objfile
->objfile
->section_offsets
[cust
->block_line_section ()];
6289 return m_unrelocated_pc
+ delta
;
6292 void _initialize_gdbtypes ();
6294 _initialize_gdbtypes ()
6296 gdbtypes_data
= gdbarch_data_register_post_init (gdbtypes_post_init
);
6298 add_setshow_zuinteger_cmd ("overload", no_class
, &overload_debug
,
6299 _("Set debugging of C++ overloading."),
6300 _("Show debugging of C++ overloading."),
6301 _("When enabled, ranking of the "
6302 "functions is displayed."),
6304 show_overload_debug
,
6305 &setdebuglist
, &showdebuglist
);
6307 /* Add user knob for controlling resolution of opaque types. */
6308 add_setshow_boolean_cmd ("opaque-type-resolution", class_support
,
6309 &opaque_type_resolution
,
6310 _("Set resolution of opaque struct/class/union"
6311 " types (if set before loading symbols)."),
6312 _("Show resolution of opaque struct/class/union"
6313 " types (if set before loading symbols)."),
6315 show_opaque_type_resolution
,
6316 &setlist
, &showlist
);
6318 /* Add an option to permit non-strict type checking. */
6319 add_setshow_boolean_cmd ("type", class_support
,
6320 &strict_type_checking
,
6321 _("Set strict type checking."),
6322 _("Show strict type checking."),
6324 show_strict_type_checking
,
6325 &setchecklist
, &showchecklist
);