2 /* Internal type definitions for GDB.
4 Copyright (C) 1992-2020 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #if !defined (GDBTYPES_H)
26 /* * \page gdbtypes GDB Types
28 GDB represents all the different kinds of types in programming
29 languages using a common representation defined in gdbtypes.h.
31 The main data structure is main_type; it consists of a code (such
32 as #TYPE_CODE_ENUM for enumeration types), a number of
33 generally-useful fields such as the printable name, and finally a
34 field main_type::type_specific that is a union of info specific to
35 particular languages or other special cases (such as calling
38 The available type codes are defined in enum #type_code. The enum
39 includes codes both for types that are common across a variety
40 of languages, and for types that are language-specific.
42 Most accesses to type fields go through macros such as
43 #TYPE_CODE(thistype) and #TYPE_FN_FIELD_CONST(thisfn, n). These are
44 written such that they can be used as both rvalues and lvalues.
48 #include "gdbsupport/array-view.h"
49 #include "gdbsupport/offset-type.h"
50 #include "gdbsupport/enum-flags.h"
51 #include "gdbsupport/underlying.h"
52 #include "gdbsupport/print-utils.h"
54 #include "gdb_obstack.h"
56 /* Forward declarations for prototypes. */
59 struct value_print_options
;
61 struct dwarf2_per_cu_data
;
62 struct dwarf2_per_objfile
;
64 /* These declarations are DWARF-specific as some of the gdbtypes.h data types
65 are already DWARF-specific. */
67 /* * Offset relative to the start of its containing CU (compilation
69 DEFINE_OFFSET_TYPE (cu_offset
, unsigned int);
71 /* * Offset relative to the start of its .debug_info or .debug_types
73 DEFINE_OFFSET_TYPE (sect_offset
, uint64_t);
76 sect_offset_str (sect_offset offset
)
78 return hex_string (to_underlying (offset
));
81 /* Some macros for char-based bitfields. */
83 #define B_SET(a,x) ((a)[(x)>>3] |= (1 << ((x)&7)))
84 #define B_CLR(a,x) ((a)[(x)>>3] &= ~(1 << ((x)&7)))
85 #define B_TST(a,x) ((a)[(x)>>3] & (1 << ((x)&7)))
86 #define B_TYPE unsigned char
87 #define B_BYTES(x) ( 1 + ((x)>>3) )
88 #define B_CLRALL(a,x) memset ((a), 0, B_BYTES(x))
90 /* * Different kinds of data types are distinguished by the `code'
95 TYPE_CODE_BITSTRING
= -1, /**< Deprecated */
96 TYPE_CODE_UNDEF
= 0, /**< Not used; catches errors */
97 TYPE_CODE_PTR
, /**< Pointer type */
99 /* * Array type with lower & upper bounds.
101 Regardless of the language, GDB represents multidimensional
102 array types the way C does: as arrays of arrays. So an
103 instance of a GDB array type T can always be seen as a series
104 of instances of TYPE_TARGET_TYPE (T) laid out sequentially in
107 Row-major languages like C lay out multi-dimensional arrays so
108 that incrementing the rightmost index in a subscripting
109 expression results in the smallest change in the address of the
110 element referred to. Column-major languages like Fortran lay
111 them out so that incrementing the leftmost index results in the
114 This means that, in column-major languages, working our way
115 from type to target type corresponds to working through indices
116 from right to left, not left to right. */
119 TYPE_CODE_STRUCT
, /**< C struct or Pascal record */
120 TYPE_CODE_UNION
, /**< C union or Pascal variant part */
121 TYPE_CODE_ENUM
, /**< Enumeration type */
122 TYPE_CODE_FLAGS
, /**< Bit flags type */
123 TYPE_CODE_FUNC
, /**< Function type */
124 TYPE_CODE_INT
, /**< Integer type */
126 /* * Floating type. This is *NOT* a complex type. */
129 /* * Void type. The length field specifies the length (probably
130 always one) which is used in pointer arithmetic involving
131 pointers to this type, but actually dereferencing such a
132 pointer is invalid; a void type has no length and no actual
133 representation in memory or registers. A pointer to a void
134 type is a generic pointer. */
137 TYPE_CODE_SET
, /**< Pascal sets */
138 TYPE_CODE_RANGE
, /**< Range (integers within spec'd bounds). */
140 /* * A string type which is like an array of character but prints
141 differently. It does not contain a length field as Pascal
142 strings (for many Pascals, anyway) do; if we want to deal with
143 such strings, we should use a new type code. */
146 /* * Unknown type. The length field is valid if we were able to
147 deduce that much about the type, or 0 if we don't even know
152 TYPE_CODE_METHOD
, /**< Method type */
154 /* * Pointer-to-member-function type. This describes how to access a
155 particular member function of a class (possibly a virtual
156 member function). The representation may vary between different
160 /* * Pointer-to-member type. This is the offset within a class to
161 some particular data member. The only currently supported
162 representation uses an unbiased offset, with -1 representing
163 NULL; this is used by the Itanium C++ ABI (used by GCC on all
167 TYPE_CODE_REF
, /**< C++ Reference types */
169 TYPE_CODE_RVALUE_REF
, /**< C++ rvalue reference types */
171 TYPE_CODE_CHAR
, /**< *real* character type */
173 /* * Boolean type. 0 is false, 1 is true, and other values are
174 non-boolean (e.g. FORTRAN "logical" used as unsigned int). */
178 TYPE_CODE_COMPLEX
, /**< Complex float */
182 TYPE_CODE_NAMESPACE
, /**< C++ namespace. */
184 TYPE_CODE_DECFLOAT
, /**< Decimal floating point. */
186 TYPE_CODE_MODULE
, /**< Fortran module. */
188 /* * Internal function type. */
189 TYPE_CODE_INTERNAL_FUNCTION
,
191 /* * Methods implemented in extension languages. */
195 /* * Some bits for the type's instance_flags word. See the macros
196 below for documentation on each bit. */
198 enum type_instance_flag_value
: unsigned
200 TYPE_INSTANCE_FLAG_CONST
= (1 << 0),
201 TYPE_INSTANCE_FLAG_VOLATILE
= (1 << 1),
202 TYPE_INSTANCE_FLAG_CODE_SPACE
= (1 << 2),
203 TYPE_INSTANCE_FLAG_DATA_SPACE
= (1 << 3),
204 TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1
= (1 << 4),
205 TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2
= (1 << 5),
206 TYPE_INSTANCE_FLAG_NOTTEXT
= (1 << 6),
207 TYPE_INSTANCE_FLAG_RESTRICT
= (1 << 7),
208 TYPE_INSTANCE_FLAG_ATOMIC
= (1 << 8)
211 DEF_ENUM_FLAGS_TYPE (enum type_instance_flag_value
, type_instance_flags
);
213 /* * A compiler may supply dwarf instrumentation
214 that indicates the desired endian interpretation of the variable
215 differs from the native endian representation. */
217 #define TYPE_ENDIANITY_NOT_DEFAULT(t) (TYPE_MAIN_TYPE (t)->flag_endianity_not_default)
219 /* * FIXME drow/2002-06-03: Only used for methods, but applies as well
222 #define TYPE_VARARGS(t) ((t)->has_varargs ())
224 /* * Identify a vector type. Gcc is handling this by adding an extra
225 attribute to the array type. We slurp that in as a new flag of a
226 type. This is used only in dwarf2read.c. */
227 #define TYPE_VECTOR(t) (TYPE_MAIN_TYPE (t)->flag_vector)
229 /* * The debugging formats (especially STABS) do not contain enough
230 information to represent all Ada types---especially those whose
231 size depends on dynamic quantities. Therefore, the GNAT Ada
232 compiler includes extra information in the form of additional type
233 definitions connected by naming conventions. This flag indicates
234 that the type is an ordinary (unencoded) GDB type that has been
235 created from the necessary run-time information, and does not need
236 further interpretation. Optionally marks ordinary, fixed-size GDB
239 #define TYPE_FIXED_INSTANCE(t) (TYPE_MAIN_TYPE (t)->flag_fixed_instance)
241 /* * This debug target supports TYPE_STUB(t). In the unsupported case
242 we have to rely on NFIELDS to be zero etc., see TYPE_IS_OPAQUE().
243 TYPE_STUB(t) with !TYPE_STUB_SUPPORTED(t) may exist if we only
244 guessed the TYPE_STUB(t) value (see dwarfread.c). */
246 #define TYPE_STUB_SUPPORTED(t) (TYPE_MAIN_TYPE (t)->flag_stub_supported)
248 /* * Not textual. By default, GDB treats all single byte integers as
249 characters (or elements of strings) unless this flag is set. */
251 #define TYPE_NOTTEXT(t) (TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_NOTTEXT)
253 /* * Used only for TYPE_CODE_FUNC where it specifies the real function
254 address is returned by this function call. TYPE_TARGET_TYPE
255 determines the final returned function type to be presented to
258 #define TYPE_GNU_IFUNC(t) (TYPE_MAIN_TYPE (t)->flag_gnu_ifunc)
260 /* * Type owner. If TYPE_OBJFILE_OWNED is true, the type is owned by
261 the objfile retrieved as TYPE_OBJFILE. Otherwise, the type is
262 owned by an architecture; TYPE_OBJFILE is NULL in this case. */
264 #define TYPE_OBJFILE_OWNED(t) (TYPE_MAIN_TYPE (t)->flag_objfile_owned)
265 #define TYPE_OWNER(t) TYPE_MAIN_TYPE(t)->owner
266 #define TYPE_OBJFILE(t) (TYPE_OBJFILE_OWNED(t)? TYPE_OWNER(t).objfile : NULL)
268 /* * True if this type was declared using the "class" keyword. This is
269 only valid for C++ structure and enum types. If false, a structure
270 was declared as a "struct"; if true it was declared "class". For
271 enum types, this is true when "enum class" or "enum struct" was
272 used to declare the type.. */
274 #define TYPE_DECLARED_CLASS(t) (TYPE_MAIN_TYPE (t)->flag_declared_class)
276 /* * True if this type is a "flag" enum. A flag enum is one where all
277 the values are pairwise disjoint when "and"ed together. This
278 affects how enum values are printed. */
280 #define TYPE_FLAG_ENUM(t) (TYPE_MAIN_TYPE (t)->flag_flag_enum)
282 /* * Constant type. If this is set, the corresponding type has a
285 #define TYPE_CONST(t) ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_CONST) != 0)
287 /* * Volatile type. If this is set, the corresponding type has a
288 volatile modifier. */
290 #define TYPE_VOLATILE(t) \
291 ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_VOLATILE) != 0)
293 /* * Restrict type. If this is set, the corresponding type has a
294 restrict modifier. */
296 #define TYPE_RESTRICT(t) \
297 ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_RESTRICT) != 0)
299 /* * Atomic type. If this is set, the corresponding type has an
302 #define TYPE_ATOMIC(t) \
303 ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_ATOMIC) != 0)
305 /* * True if this type represents either an lvalue or lvalue reference type. */
307 #define TYPE_IS_REFERENCE(t) \
308 ((t)->code () == TYPE_CODE_REF || (t)->code () == TYPE_CODE_RVALUE_REF)
310 /* * True if this type is allocatable. */
311 #define TYPE_IS_ALLOCATABLE(t) \
312 ((t)->dyn_prop (DYN_PROP_ALLOCATED) != NULL)
314 /* * True if this type has variant parts. */
315 #define TYPE_HAS_VARIANT_PARTS(t) \
316 ((t)->dyn_prop (DYN_PROP_VARIANT_PARTS) != nullptr)
318 /* * True if this type has a dynamic length. */
319 #define TYPE_HAS_DYNAMIC_LENGTH(t) \
320 ((t)->dyn_prop (DYN_PROP_BYTE_SIZE) != nullptr)
322 /* * Instruction-space delimited type. This is for Harvard architectures
323 which have separate instruction and data address spaces (and perhaps
326 GDB usually defines a flat address space that is a superset of the
327 architecture's two (or more) address spaces, but this is an extension
328 of the architecture's model.
330 If TYPE_INSTANCE_FLAG_CODE_SPACE is set, an object of the corresponding type
331 resides in instruction memory, even if its address (in the extended
332 flat address space) does not reflect this.
334 Similarly, if TYPE_INSTANCE_FLAG_DATA_SPACE is set, then an object of the
335 corresponding type resides in the data memory space, even if
336 this is not indicated by its (flat address space) address.
338 If neither flag is set, the default space for functions / methods
339 is instruction space, and for data objects is data memory. */
341 #define TYPE_CODE_SPACE(t) \
342 ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_CODE_SPACE) != 0)
344 #define TYPE_DATA_SPACE(t) \
345 ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_DATA_SPACE) != 0)
347 /* * Address class flags. Some environments provide for pointers
348 whose size is different from that of a normal pointer or address
349 types where the bits are interpreted differently than normal
350 addresses. The TYPE_INSTANCE_FLAG_ADDRESS_CLASS_n flags may be used in
351 target specific ways to represent these different types of address
354 #define TYPE_ADDRESS_CLASS_1(t) (TYPE_INSTANCE_FLAGS(t) \
355 & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1)
356 #define TYPE_ADDRESS_CLASS_2(t) (TYPE_INSTANCE_FLAGS(t) \
357 & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2)
358 #define TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL \
359 (TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2)
360 #define TYPE_ADDRESS_CLASS_ALL(t) (TYPE_INSTANCE_FLAGS(t) \
361 & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
363 /* * Information about a single discriminant. */
365 struct discriminant_range
367 /* * The range of values for the variant. This is an inclusive
371 /* * Return true if VALUE is contained in this range. IS_UNSIGNED
372 is true if this should be an unsigned comparison; false for
374 bool contains (ULONGEST value
, bool is_unsigned
) const
377 return value
>= low
&& value
<= high
;
378 LONGEST valuel
= (LONGEST
) value
;
379 return valuel
>= (LONGEST
) low
&& valuel
<= (LONGEST
) high
;
385 /* * A single variant. A variant has a list of discriminant values.
386 When the discriminator matches one of these, the variant is
387 enabled. Each variant controls zero or more fields; and may also
388 control other variant parts as well. This struct corresponds to
389 DW_TAG_variant in DWARF. */
391 struct variant
: allocate_on_obstack
393 /* * The discriminant ranges for this variant. */
394 gdb::array_view
<discriminant_range
> discriminants
;
396 /* * The fields controlled by this variant. This is inclusive on
397 the low end and exclusive on the high end. A variant may not
398 control any fields, in which case the two values will be equal.
399 These are indexes into the type's array of fields. */
403 /* * Variant parts controlled by this variant. */
404 gdb::array_view
<variant_part
> parts
;
406 /* * Return true if this is the default variant. The default
407 variant can be recognized because it has no associated
409 bool is_default () const
411 return discriminants
.empty ();
414 /* * Return true if this variant matches VALUE. IS_UNSIGNED is true
415 if this should be an unsigned comparison; false for signed. */
416 bool matches (ULONGEST value
, bool is_unsigned
) const;
419 /* * A variant part. Each variant part has an optional discriminant
420 and holds an array of variants. This struct corresponds to
421 DW_TAG_variant_part in DWARF. */
423 struct variant_part
: allocate_on_obstack
425 /* * The index of the discriminant field in the outer type. This is
426 an index into the type's array of fields. If this is -1, there
427 is no discriminant, and only the default variant can be
428 considered to be selected. */
429 int discriminant_index
;
431 /* * True if this discriminant is unsigned; false if signed. This
432 comes from the type of the discriminant. */
435 /* * The variants that are controlled by this variant part. Note
436 that these will always be sorted by field number. */
437 gdb::array_view
<variant
> variants
;
441 enum dynamic_prop_kind
443 PROP_UNDEFINED
, /* Not defined. */
444 PROP_CONST
, /* Constant. */
445 PROP_ADDR_OFFSET
, /* Address offset. */
446 PROP_LOCEXPR
, /* Location expression. */
447 PROP_LOCLIST
, /* Location list. */
448 PROP_VARIANT_PARTS
, /* Variant parts. */
449 PROP_TYPE
, /* Type. */
452 union dynamic_prop_data
454 /* Storage for constant property. */
458 /* Storage for dynamic property. */
462 /* Storage of variant parts for a type. A type with variant parts
463 has all its fields "linearized" -- stored in a single field
464 array, just as if they had all been declared that way. The
465 variant parts are attached via a dynamic property, and then are
466 used to control which fields end up in the final type during
467 dynamic type resolution. */
469 const gdb::array_view
<variant_part
> *variant_parts
;
471 /* Once a variant type is resolved, we may want to be able to go
472 from the resolved type to the original type. In this case we
473 rewrite the property's kind and set this field. */
475 struct type
*original_type
;
478 /* * Used to store a dynamic property. */
482 dynamic_prop_kind
kind () const
487 void set_undefined ()
489 m_kind
= PROP_UNDEFINED
;
492 LONGEST
const_val () const
494 gdb_assert (m_kind
== PROP_CONST
);
496 return m_data
.const_val
;
499 void set_const_val (LONGEST const_val
)
502 m_data
.const_val
= const_val
;
507 gdb_assert (m_kind
== PROP_LOCEXPR
508 || m_kind
== PROP_LOCLIST
509 || m_kind
== PROP_ADDR_OFFSET
);
514 void set_locexpr (void *baton
)
516 m_kind
= PROP_LOCEXPR
;
517 m_data
.baton
= baton
;
520 void set_loclist (void *baton
)
522 m_kind
= PROP_LOCLIST
;
523 m_data
.baton
= baton
;
526 void set_addr_offset (void *baton
)
528 m_kind
= PROP_ADDR_OFFSET
;
529 m_data
.baton
= baton
;
532 const gdb::array_view
<variant_part
> *variant_parts () const
534 gdb_assert (m_kind
== PROP_VARIANT_PARTS
);
536 return m_data
.variant_parts
;
539 void set_variant_parts (gdb::array_view
<variant_part
> *variant_parts
)
541 m_kind
= PROP_VARIANT_PARTS
;
542 m_data
.variant_parts
= variant_parts
;
545 struct type
*original_type () const
547 gdb_assert (m_kind
== PROP_TYPE
);
549 return m_data
.original_type
;
552 void set_original_type (struct type
*original_type
)
555 m_data
.original_type
= original_type
;
558 /* Determine which field of the union dynamic_prop.data is used. */
559 enum dynamic_prop_kind m_kind
;
561 /* Storage for dynamic or static value. */
562 union dynamic_prop_data m_data
;
565 /* Compare two dynamic_prop objects for equality. dynamic_prop
566 instances are equal iff they have the same type and storage. */
567 extern bool operator== (const dynamic_prop
&l
, const dynamic_prop
&r
);
569 /* Compare two dynamic_prop objects for inequality. */
570 static inline bool operator!= (const dynamic_prop
&l
, const dynamic_prop
&r
)
575 /* * Define a type's dynamic property node kind. */
576 enum dynamic_prop_node_kind
578 /* A property providing a type's data location.
579 Evaluating this field yields to the location of an object's data. */
580 DYN_PROP_DATA_LOCATION
,
582 /* A property representing DW_AT_allocated. The presence of this attribute
583 indicates that the object of the type can be allocated/deallocated. */
586 /* A property representing DW_AT_associated. The presence of this attribute
587 indicated that the object of the type can be associated. */
590 /* A property providing an array's byte stride. */
591 DYN_PROP_BYTE_STRIDE
,
593 /* A property holding variant parts. */
594 DYN_PROP_VARIANT_PARTS
,
596 /* A property holding the size of the type. */
600 /* * List for dynamic type attributes. */
601 struct dynamic_prop_list
603 /* The kind of dynamic prop in this node. */
604 enum dynamic_prop_node_kind prop_kind
;
606 /* The dynamic property itself. */
607 struct dynamic_prop prop
;
609 /* A pointer to the next dynamic property. */
610 struct dynamic_prop_list
*next
;
613 /* * Determine which field of the union main_type.fields[x].loc is
618 FIELD_LOC_KIND_BITPOS
, /**< bitpos */
619 FIELD_LOC_KIND_ENUMVAL
, /**< enumval */
620 FIELD_LOC_KIND_PHYSADDR
, /**< physaddr */
621 FIELD_LOC_KIND_PHYSNAME
, /**< physname */
622 FIELD_LOC_KIND_DWARF_BLOCK
/**< dwarf_block */
625 /* * A discriminant to determine which field in the
626 main_type.type_specific union is being used, if any.
628 For types such as TYPE_CODE_FLT, the use of this
629 discriminant is really redundant, as we know from the type code
630 which field is going to be used. As such, it would be possible to
631 reduce the size of this enum in order to save a bit or two for
632 other fields of struct main_type. But, since we still have extra
633 room , and for the sake of clarity and consistency, we treat all fields
634 of the union the same way. */
636 enum type_specific_kind
639 TYPE_SPECIFIC_CPLUS_STUFF
,
640 TYPE_SPECIFIC_GNAT_STUFF
,
641 TYPE_SPECIFIC_FLOATFORMAT
,
642 /* Note: This is used by TYPE_CODE_FUNC and TYPE_CODE_METHOD. */
644 TYPE_SPECIFIC_SELF_TYPE
649 struct objfile
*objfile
;
650 struct gdbarch
*gdbarch
;
655 /* * Position of this field, counting in bits from start of
656 containing structure. For big-endian targets, it is the bit
657 offset to the MSB. For little-endian targets, it is the bit
658 offset to the LSB. */
665 /* * For a static field, if TYPE_FIELD_STATIC_HAS_ADDR then
666 physaddr is the location (in the target) of the static
667 field. Otherwise, physname is the mangled label of the
671 const char *physname
;
673 /* * The field location can be computed by evaluating the
674 following DWARF block. Its DATA is allocated on
675 objfile_obstack - no CU load is needed to access it. */
677 struct dwarf2_locexpr_baton
*dwarf_block
;
682 struct type
*type () const
687 void set_type (struct type
*type
)
692 union field_location loc
;
694 /* * For a function or member type, this is 1 if the argument is
695 marked artificial. Artificial arguments should not be shown
696 to the user. For TYPE_CODE_RANGE it is set if the specific
697 bound is not defined. */
699 unsigned int artificial
: 1;
701 /* * Discriminant for union field_location. */
703 ENUM_BITFIELD(field_loc_kind
) loc_kind
: 3;
705 /* * Size of this field, in bits, or zero if not packed.
706 If non-zero in an array type, indicates the element size in
707 bits (used only in Ada at the moment).
708 For an unpacked field, the field's type's length
709 says how many bytes the field occupies. */
711 unsigned int bitsize
: 28;
713 /* * In a struct or union type, type of this field.
714 - In a function or member type, type of this argument.
715 - In an array type, the domain-type of the array. */
719 /* * Name of field, value or argument.
720 NULL for range bounds, array domains, and member function
728 ULONGEST
bit_stride () const
730 if (this->flag_is_byte_stride
)
731 return this->stride
.const_val () * 8;
733 return this->stride
.const_val ();
736 /* * Low bound of range. */
738 struct dynamic_prop low
;
740 /* * High bound of range. */
742 struct dynamic_prop high
;
744 /* The stride value for this range. This can be stored in bits or bytes
745 based on the value of BYTE_STRIDE_P. It is optional to have a stride
746 value, if this range has no stride value defined then this will be set
747 to the constant zero. */
749 struct dynamic_prop stride
;
751 /* * The bias. Sometimes a range value is biased before storage.
752 The bias is added to the stored bits to form the true value. */
756 /* True if HIGH range bound contains the number of elements in the
757 subrange. This affects how the final high bound is computed. */
759 unsigned int flag_upper_bound_is_count
: 1;
761 /* True if LOW or/and HIGH are resolved into a static bound from
764 unsigned int flag_bound_evaluated
: 1;
766 /* If this is true this STRIDE is in bytes, otherwise STRIDE is in bits. */
768 unsigned int flag_is_byte_stride
: 1;
771 /* Compare two range_bounds objects for equality. Simply does
772 memberwise comparison. */
773 extern bool operator== (const range_bounds
&l
, const range_bounds
&r
);
775 /* Compare two range_bounds objects for inequality. */
776 static inline bool operator!= (const range_bounds
&l
, const range_bounds
&r
)
783 /* * CPLUS_STUFF is for TYPE_CODE_STRUCT. It is initialized to
784 point to cplus_struct_default, a default static instance of a
785 struct cplus_struct_type. */
787 struct cplus_struct_type
*cplus_stuff
;
789 /* * GNAT_STUFF is for types for which the GNAT Ada compiler
790 provides additional information. */
792 struct gnat_aux_type
*gnat_stuff
;
794 /* * FLOATFORMAT is for TYPE_CODE_FLT. It is a pointer to a
795 floatformat object that describes the floating-point value
796 that resides within the type. */
798 const struct floatformat
*floatformat
;
800 /* * For TYPE_CODE_FUNC and TYPE_CODE_METHOD types. */
802 struct func_type
*func_stuff
;
804 /* * For types that are pointer to member types (TYPE_CODE_METHODPTR,
805 TYPE_CODE_MEMBERPTR), SELF_TYPE is the type that this pointer
808 struct type
*self_type
;
811 /* * Main structure representing a type in GDB.
813 This structure is space-critical. Its layout has been tweaked to
814 reduce the space used. */
818 /* * Code for kind of type. */
820 ENUM_BITFIELD(type_code
) code
: 8;
822 /* * Flags about this type. These fields appear at this location
823 because they packs nicely here. See the TYPE_* macros for
824 documentation about these fields. */
826 unsigned int m_flag_unsigned
: 1;
827 unsigned int m_flag_nosign
: 1;
828 unsigned int m_flag_stub
: 1;
829 unsigned int m_flag_target_stub
: 1;
830 unsigned int m_flag_prototyped
: 1;
831 unsigned int m_flag_varargs
: 1;
832 unsigned int flag_vector
: 1;
833 unsigned int flag_stub_supported
: 1;
834 unsigned int flag_gnu_ifunc
: 1;
835 unsigned int flag_fixed_instance
: 1;
836 unsigned int flag_objfile_owned
: 1;
837 unsigned int flag_endianity_not_default
: 1;
839 /* * True if this type was declared with "class" rather than
842 unsigned int flag_declared_class
: 1;
844 /* * True if this is an enum type with disjoint values. This
845 affects how the enum is printed. */
847 unsigned int flag_flag_enum
: 1;
849 /* * A discriminant telling us which field of the type_specific
850 union is being used for this type, if any. */
852 ENUM_BITFIELD(type_specific_kind
) type_specific_field
: 3;
854 /* * Number of fields described for this type. This field appears
855 at this location because it packs nicely here. */
859 /* * Name of this type, or NULL if none.
861 This is used for printing only. For looking up a name, look for
862 a symbol in the VAR_DOMAIN. This is generally allocated in the
863 objfile's obstack. However coffread.c uses malloc. */
867 /* * Every type is now associated with a particular objfile, and the
868 type is allocated on the objfile_obstack for that objfile. One
869 problem however, is that there are times when gdb allocates new
870 types while it is not in the process of reading symbols from a
871 particular objfile. Fortunately, these happen when the type
872 being created is a derived type of an existing type, such as in
873 lookup_pointer_type(). So we can just allocate the new type
874 using the same objfile as the existing type, but to do this we
875 need a backpointer to the objfile from the existing type. Yes
876 this is somewhat ugly, but without major overhaul of the internal
877 type system, it can't be avoided for now. */
879 union type_owner owner
;
881 /* * For a pointer type, describes the type of object pointed to.
882 - For an array type, describes the type of the elements.
883 - For a function or method type, describes the type of the return value.
884 - For a range type, describes the type of the full range.
885 - For a complex type, describes the type of each coordinate.
886 - For a special record or union type encoding a dynamic-sized type
887 in GNAT, a memoized pointer to a corresponding static version of
889 - Unused otherwise. */
891 struct type
*target_type
;
893 /* * For structure and union types, a description of each field.
894 For set and pascal array types, there is one "field",
895 whose type is the domain type of the set or array.
896 For range types, there are two "fields",
897 the minimum and maximum values (both inclusive).
898 For enum types, each possible value is described by one "field".
899 For a function or method type, a "field" for each parameter.
900 For C++ classes, there is one field for each base class (if it is
901 a derived class) plus one field for each class data member. Member
902 functions are recorded elsewhere.
904 Using a pointer to a separate array of fields
905 allows all types to have the same size, which is useful
906 because we can allocate the space for a type before
907 we know what to put in it. */
911 struct field
*fields
;
913 /* * Union member used for range types. */
915 struct range_bounds
*bounds
;
917 /* If this is a scalar type, then this is its corresponding
919 struct type
*complex_type
;
923 /* * Slot to point to additional language-specific fields of this
926 union type_specific type_specific
;
928 /* * Contains all dynamic type properties. */
929 struct dynamic_prop_list
*dyn_prop_list
;
932 /* * Number of bits allocated for alignment. */
934 #define TYPE_ALIGN_BITS 8
936 /* * A ``struct type'' describes a particular instance of a type, with
937 some particular qualification. */
941 /* Get the type code of this type.
943 Note that the code can be TYPE_CODE_TYPEDEF, so if you want the real
944 type, you need to do `check_typedef (type)->code ()`. */
945 type_code
code () const
947 return this->main_type
->code
;
950 /* Set the type code of this type. */
951 void set_code (type_code code
)
953 this->main_type
->code
= code
;
956 /* Get the name of this type. */
957 const char *name () const
959 return this->main_type
->name
;
962 /* Set the name of this type. */
963 void set_name (const char *name
)
965 this->main_type
->name
= name
;
968 /* Get the number of fields of this type. */
969 int num_fields () const
971 return this->main_type
->nfields
;
974 /* Set the number of fields of this type. */
975 void set_num_fields (int num_fields
)
977 this->main_type
->nfields
= num_fields
;
980 /* Get the fields array of this type. */
981 struct field
*fields () const
983 return this->main_type
->flds_bnds
.fields
;
986 /* Get the field at index IDX. */
987 struct field
&field (int idx
) const
989 return this->fields ()[idx
];
992 /* Set the fields array of this type. */
993 void set_fields (struct field
*fields
)
995 this->main_type
->flds_bnds
.fields
= fields
;
998 type
*index_type () const
1000 return this->field (0).type ();
1003 void set_index_type (type
*index_type
)
1005 this->field (0).set_type (index_type
);
1008 /* Get the bounds bounds of this type. The type must be a range type. */
1009 range_bounds
*bounds () const
1011 switch (this->code ())
1013 case TYPE_CODE_RANGE
:
1014 return this->main_type
->flds_bnds
.bounds
;
1016 case TYPE_CODE_ARRAY
:
1017 case TYPE_CODE_STRING
:
1018 return this->index_type ()->bounds ();
1021 gdb_assert_not_reached
1022 ("type::bounds called on type with invalid code");
1026 /* Set the bounds of this type. The type must be a range type. */
1027 void set_bounds (range_bounds
*bounds
)
1029 gdb_assert (this->code () == TYPE_CODE_RANGE
);
1031 this->main_type
->flds_bnds
.bounds
= bounds
;
1034 ULONGEST
bit_stride () const
1036 return this->bounds ()->bit_stride ();
1039 /* Unsigned integer type. If this is not set for a TYPE_CODE_INT,
1040 the type is signed (unless TYPE_NOSIGN is set). */
1042 bool is_unsigned () const
1044 return this->main_type
->m_flag_unsigned
;
1047 void set_is_unsigned (bool is_unsigned
)
1049 this->main_type
->m_flag_unsigned
= is_unsigned
;
1052 /* No sign for this type. In C++, "char", "signed char", and
1053 "unsigned char" are distinct types; so we need an extra flag to
1054 indicate the absence of a sign! */
1056 bool has_no_signedness () const
1058 return this->main_type
->m_flag_nosign
;
1061 void set_has_no_signedness (bool has_no_signedness
)
1063 this->main_type
->m_flag_nosign
= has_no_signedness
;
1066 /* This appears in a type's flags word if it is a stub type (e.g.,
1067 if someone referenced a type that wasn't defined in a source file
1068 via (struct sir_not_appearing_in_this_film *)). */
1070 bool is_stub () const
1072 return this->main_type
->m_flag_stub
;
1075 void set_is_stub (bool is_stub
)
1077 this->main_type
->m_flag_stub
= is_stub
;
1080 /* The target type of this type is a stub type, and this type needs
1081 to be updated if it gets un-stubbed in check_typedef. Used for
1082 arrays and ranges, in which TYPE_LENGTH of the array/range gets set
1083 based on the TYPE_LENGTH of the target type. Also, set for
1084 TYPE_CODE_TYPEDEF. */
1086 bool target_is_stub () const
1088 return this->main_type
->m_flag_target_stub
;
1091 void set_target_is_stub (bool target_is_stub
)
1093 this->main_type
->m_flag_target_stub
= target_is_stub
;
1096 /* This is a function type which appears to have a prototype. We
1097 need this for function calls in order to tell us if it's necessary
1098 to coerce the args, or to just do the standard conversions. This
1099 is used with a short field. */
1101 bool is_prototyped () const
1103 return this->main_type
->m_flag_prototyped
;
1106 void set_is_prototyped (bool is_prototyped
)
1108 this->main_type
->m_flag_prototyped
= is_prototyped
;
1111 bool has_varargs () const
1113 return this->main_type
->m_flag_varargs
;
1116 void set_has_varargs (bool has_varargs
)
1118 this->main_type
->m_flag_varargs
= has_varargs
;
1121 /* * Return the dynamic property of the requested KIND from this type's
1122 list of dynamic properties. */
1123 dynamic_prop
*dyn_prop (dynamic_prop_node_kind kind
) const;
1125 /* * Given a dynamic property PROP of a given KIND, add this dynamic
1126 property to this type.
1128 This function assumes that this type is objfile-owned. */
1129 void add_dyn_prop (dynamic_prop_node_kind kind
, dynamic_prop prop
);
1131 /* * Remove dynamic property of kind KIND from this type, if it exists. */
1132 void remove_dyn_prop (dynamic_prop_node_kind kind
);
1134 /* * Type that is a pointer to this type.
1135 NULL if no such pointer-to type is known yet.
1136 The debugger may add the address of such a type
1137 if it has to construct one later. */
1139 struct type
*pointer_type
;
1141 /* * C++: also need a reference type. */
1143 struct type
*reference_type
;
1145 /* * A C++ rvalue reference type added in C++11. */
1147 struct type
*rvalue_reference_type
;
1149 /* * Variant chain. This points to a type that differs from this
1150 one only in qualifiers and length. Currently, the possible
1151 qualifiers are const, volatile, code-space, data-space, and
1152 address class. The length may differ only when one of the
1153 address class flags are set. The variants are linked in a
1154 circular ring and share MAIN_TYPE. */
1158 /* * The alignment for this type. Zero means that the alignment was
1159 not specified in the debug info. Note that this is stored in a
1160 funny way: as the log base 2 (plus 1) of the alignment; so a
1161 value of 1 means the alignment is 1, and a value of 9 means the
1162 alignment is 256. */
1164 unsigned align_log2
: TYPE_ALIGN_BITS
;
1166 /* * Flags specific to this instance of the type, indicating where
1169 For TYPE_CODE_TYPEDEF the flags of the typedef type should be
1170 binary or-ed with the target type, with a special case for
1171 address class and space class. For example if this typedef does
1172 not specify any new qualifiers, TYPE_INSTANCE_FLAGS is 0 and the
1173 instance flags are completely inherited from the target type. No
1174 qualifiers can be cleared by the typedef. See also
1176 unsigned instance_flags
: 9;
1178 /* * Length of storage for a value of this type. The value is the
1179 expression in host bytes of what sizeof(type) would return. This
1180 size includes padding. For example, an i386 extended-precision
1181 floating point value really only occupies ten bytes, but most
1182 ABI's declare its size to be 12 bytes, to preserve alignment.
1183 A `struct type' representing such a floating-point type would
1184 have a `length' value of 12, even though the last two bytes are
1187 Since this field is expressed in host bytes, its value is appropriate
1188 to pass to memcpy and such (it is assumed that GDB itself always runs
1189 on an 8-bits addressable architecture). However, when using it for
1190 target address arithmetic (e.g. adding it to a target address), the
1191 type_length_units function should be used in order to get the length
1192 expressed in target addressable memory units. */
1196 /* * Core type, shared by a group of qualified types. */
1198 struct main_type
*main_type
;
1204 /* * The overloaded name.
1205 This is generally allocated in the objfile's obstack.
1206 However stabsread.c sometimes uses malloc. */
1210 /* * The number of methods with this name. */
1214 /* * The list of methods. */
1216 struct fn_field
*fn_fields
;
1223 /* * If is_stub is clear, this is the mangled name which we can look
1224 up to find the address of the method (FIXME: it would be cleaner
1225 to have a pointer to the struct symbol here instead).
1227 If is_stub is set, this is the portion of the mangled name which
1228 specifies the arguments. For example, "ii", if there are two int
1229 arguments, or "" if there are no arguments. See gdb_mangle_name
1230 for the conversion from this format to the one used if is_stub is
1233 const char *physname
;
1235 /* * The function type for the method.
1237 (This comment used to say "The return value of the method", but
1238 that's wrong. The function type is expected here, i.e. something
1239 with TYPE_CODE_METHOD, and *not* the return-value type). */
1243 /* * For virtual functions. First baseclass that defines this
1244 virtual function. */
1246 struct type
*fcontext
;
1250 unsigned int is_const
:1;
1251 unsigned int is_volatile
:1;
1252 unsigned int is_private
:1;
1253 unsigned int is_protected
:1;
1254 unsigned int is_artificial
:1;
1256 /* * A stub method only has some fields valid (but they are enough
1257 to reconstruct the rest of the fields). */
1259 unsigned int is_stub
:1;
1261 /* * True if this function is a constructor, false otherwise. */
1263 unsigned int is_constructor
: 1;
1265 /* * True if this function is deleted, false otherwise. */
1267 unsigned int is_deleted
: 1;
1269 /* * DW_AT_defaulted attribute for this function. The value is one
1270 of the DW_DEFAULTED constants. */
1272 ENUM_BITFIELD (dwarf_defaulted_attribute
) defaulted
: 2;
1276 unsigned int dummy
:6;
1278 /* * Index into that baseclass's virtual function table, minus 2;
1279 else if static: VOFFSET_STATIC; else: 0. */
1281 unsigned int voffset
:16;
1283 #define VOFFSET_STATIC 1
1289 /* * Unqualified name to be prefixed by owning class qualified
1294 /* * Type this typedef named NAME represents. */
1298 /* * True if this field was declared protected, false otherwise. */
1299 unsigned int is_protected
: 1;
1301 /* * True if this field was declared private, false otherwise. */
1302 unsigned int is_private
: 1;
1305 /* * C++ language-specific information for TYPE_CODE_STRUCT and
1306 TYPE_CODE_UNION nodes. */
1308 struct cplus_struct_type
1310 /* * Number of base classes this type derives from. The
1311 baseclasses are stored in the first N_BASECLASSES fields
1312 (i.e. the `fields' field of the struct type). The only fields
1313 of struct field that are used are: type, name, loc.bitpos. */
1315 short n_baseclasses
;
1317 /* * Field number of the virtual function table pointer in VPTR_BASETYPE.
1318 All access to this field must be through TYPE_VPTR_FIELDNO as one
1319 thing it does is check whether the field has been initialized.
1320 Initially TYPE_RAW_CPLUS_SPECIFIC has the value of cplus_struct_default,
1321 which for portability reasons doesn't initialize this field.
1322 TYPE_VPTR_FIELDNO returns -1 for this case.
1324 If -1, we were unable to find the virtual function table pointer in
1325 initial symbol reading, and get_vptr_fieldno should be called to find
1326 it if possible. get_vptr_fieldno will update this field if possible.
1327 Otherwise the value is left at -1.
1329 Unused if this type does not have virtual functions. */
1333 /* * Number of methods with unique names. All overloaded methods
1334 with the same name count only once. */
1338 /* * Number of template arguments. */
1340 unsigned short n_template_arguments
;
1342 /* * One if this struct is a dynamic class, as defined by the
1343 Itanium C++ ABI: if it requires a virtual table pointer,
1344 because it or any of its base classes have one or more virtual
1345 member functions or virtual base classes. Minus one if not
1346 dynamic. Zero if not yet computed. */
1350 /* * The calling convention for this type, fetched from the
1351 DW_AT_calling_convention attribute. The value is one of the
1354 ENUM_BITFIELD (dwarf_calling_convention
) calling_convention
: 8;
1356 /* * The base class which defined the virtual function table pointer. */
1358 struct type
*vptr_basetype
;
1360 /* * For derived classes, the number of base classes is given by
1361 n_baseclasses and virtual_field_bits is a bit vector containing
1362 one bit per base class. If the base class is virtual, the
1363 corresponding bit will be set.
1368 class C : public B, public virtual A {};
1370 B is a baseclass of C; A is a virtual baseclass for C.
1371 This is a C++ 2.0 language feature. */
1373 B_TYPE
*virtual_field_bits
;
1375 /* * For classes with private fields, the number of fields is
1376 given by nfields and private_field_bits is a bit vector
1377 containing one bit per field.
1379 If the field is private, the corresponding bit will be set. */
1381 B_TYPE
*private_field_bits
;
1383 /* * For classes with protected fields, the number of fields is
1384 given by nfields and protected_field_bits is a bit vector
1385 containing one bit per field.
1387 If the field is private, the corresponding bit will be set. */
1389 B_TYPE
*protected_field_bits
;
1391 /* * For classes with fields to be ignored, either this is
1392 optimized out or this field has length 0. */
1394 B_TYPE
*ignore_field_bits
;
1396 /* * For classes, structures, and unions, a description of each
1397 field, which consists of an overloaded name, followed by the
1398 types of arguments that the method expects, and then the name
1399 after it has been renamed to make it distinct.
1401 fn_fieldlists points to an array of nfn_fields of these. */
1403 struct fn_fieldlist
*fn_fieldlists
;
1405 /* * typedefs defined inside this class. typedef_field points to
1406 an array of typedef_field_count elements. */
1408 struct decl_field
*typedef_field
;
1410 unsigned typedef_field_count
;
1412 /* * The nested types defined by this type. nested_types points to
1413 an array of nested_types_count elements. */
1415 struct decl_field
*nested_types
;
1417 unsigned nested_types_count
;
1419 /* * The template arguments. This is an array with
1420 N_TEMPLATE_ARGUMENTS elements. This is NULL for non-template
1423 struct symbol
**template_arguments
;
1426 /* * Struct used to store conversion rankings. */
1432 /* * When two conversions are of the same type and therefore have
1433 the same rank, subrank is used to differentiate the two.
1435 Eg: Two derived-class-pointer to base-class-pointer conversions
1436 would both have base pointer conversion rank, but the
1437 conversion with the shorter distance to the ancestor is
1438 preferable. 'subrank' would be used to reflect that. */
1443 /* * Used for ranking a function for overload resolution. */
1445 typedef std::vector
<rank
> badness_vector
;
1447 /* * GNAT Ada-specific information for various Ada types. */
1449 struct gnat_aux_type
1451 /* * Parallel type used to encode information about dynamic types
1452 used in Ada (such as variant records, variable-size array,
1454 struct type
* descriptive_type
;
1457 /* * For TYPE_CODE_FUNC and TYPE_CODE_METHOD types. */
1461 /* * The calling convention for targets supporting multiple ABIs.
1462 Right now this is only fetched from the Dwarf-2
1463 DW_AT_calling_convention attribute. The value is one of the
1466 ENUM_BITFIELD (dwarf_calling_convention
) calling_convention
: 8;
1468 /* * Whether this function normally returns to its caller. It is
1469 set from the DW_AT_noreturn attribute if set on the
1470 DW_TAG_subprogram. */
1472 unsigned int is_noreturn
: 1;
1474 /* * Only those DW_TAG_call_site's in this function that have
1475 DW_AT_call_tail_call set are linked in this list. Function
1476 without its tail call list complete
1477 (DW_AT_call_all_tail_calls or its superset
1478 DW_AT_call_all_calls) has TAIL_CALL_LIST NULL, even if some
1479 DW_TAG_call_site's exist in such function. */
1481 struct call_site
*tail_call_list
;
1483 /* * For method types (TYPE_CODE_METHOD), the aggregate type that
1484 contains the method. */
1486 struct type
*self_type
;
1489 /* struct call_site_parameter can be referenced in callees by several ways. */
1491 enum call_site_parameter_kind
1493 /* * Use field call_site_parameter.u.dwarf_reg. */
1494 CALL_SITE_PARAMETER_DWARF_REG
,
1496 /* * Use field call_site_parameter.u.fb_offset. */
1497 CALL_SITE_PARAMETER_FB_OFFSET
,
1499 /* * Use field call_site_parameter.u.param_offset. */
1500 CALL_SITE_PARAMETER_PARAM_OFFSET
1503 struct call_site_target
1505 union field_location loc
;
1507 /* * Discriminant for union field_location. */
1509 ENUM_BITFIELD(field_loc_kind
) loc_kind
: 3;
1512 union call_site_parameter_u
1514 /* * DW_TAG_formal_parameter's DW_AT_location's DW_OP_regX
1515 as DWARF register number, for register passed
1520 /* * Offset from the callee's frame base, for stack passed
1521 parameters. This equals offset from the caller's stack
1524 CORE_ADDR fb_offset
;
1526 /* * Offset relative to the start of this PER_CU to
1527 DW_TAG_formal_parameter which is referenced by both
1528 caller and the callee. */
1530 cu_offset param_cu_off
;
1533 struct call_site_parameter
1535 ENUM_BITFIELD (call_site_parameter_kind
) kind
: 2;
1537 union call_site_parameter_u u
;
1539 /* * DW_TAG_formal_parameter's DW_AT_call_value. It is never NULL. */
1541 const gdb_byte
*value
;
1544 /* * DW_TAG_formal_parameter's DW_AT_call_data_value.
1545 It may be NULL if not provided by DWARF. */
1547 const gdb_byte
*data_value
;
1548 size_t data_value_size
;
1551 /* * A place where a function gets called from, represented by
1552 DW_TAG_call_site. It can be looked up from symtab->call_site_htab. */
1556 /* * Address of the first instruction after this call. It must be
1557 the first field as we overload core_addr_hash and core_addr_eq
1562 /* * List successor with head in FUNC_TYPE.TAIL_CALL_LIST. */
1564 struct call_site
*tail_call_next
;
1566 /* * Describe DW_AT_call_target. Missing attribute uses
1567 FIELD_LOC_KIND_DWARF_BLOCK with FIELD_DWARF_BLOCK == NULL. */
1569 struct call_site_target target
;
1571 /* * Size of the PARAMETER array. */
1573 unsigned parameter_count
;
1575 /* * CU of the function where the call is located. It gets used
1576 for DWARF blocks execution in the parameter array below. */
1578 dwarf2_per_cu_data
*per_cu
;
1580 /* objfile of the function where the call is located. */
1582 dwarf2_per_objfile
*per_objfile
;
1584 /* * Describe DW_TAG_call_site's DW_TAG_formal_parameter. */
1586 struct call_site_parameter parameter
[1];
1589 /* * The default value of TYPE_CPLUS_SPECIFIC(T) points to this shared
1590 static structure. */
1592 extern const struct cplus_struct_type cplus_struct_default
;
1594 extern void allocate_cplus_struct_type (struct type
*);
1596 #define INIT_CPLUS_SPECIFIC(type) \
1597 (TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_CPLUS_STUFF, \
1598 TYPE_RAW_CPLUS_SPECIFIC (type) = (struct cplus_struct_type*) \
1599 &cplus_struct_default)
1601 #define ALLOCATE_CPLUS_STRUCT_TYPE(type) allocate_cplus_struct_type (type)
1603 #define HAVE_CPLUS_STRUCT(type) \
1604 (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_CPLUS_STUFF \
1605 && TYPE_RAW_CPLUS_SPECIFIC (type) != &cplus_struct_default)
1607 #define INIT_NONE_SPECIFIC(type) \
1608 (TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_NONE, \
1609 TYPE_MAIN_TYPE (type)->type_specific = {})
1611 extern const struct gnat_aux_type gnat_aux_default
;
1613 extern void allocate_gnat_aux_type (struct type
*);
1615 #define INIT_GNAT_SPECIFIC(type) \
1616 (TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_GNAT_STUFF, \
1617 TYPE_GNAT_SPECIFIC (type) = (struct gnat_aux_type *) &gnat_aux_default)
1618 #define ALLOCATE_GNAT_AUX_TYPE(type) allocate_gnat_aux_type (type)
1619 /* * A macro that returns non-zero if the type-specific data should be
1620 read as "gnat-stuff". */
1621 #define HAVE_GNAT_AUX_INFO(type) \
1622 (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_GNAT_STUFF)
1624 /* * True if TYPE is known to be an Ada type of some kind. */
1625 #define ADA_TYPE_P(type) \
1626 (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_GNAT_STUFF \
1627 || (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_NONE \
1628 && TYPE_FIXED_INSTANCE (type)))
1630 #define INIT_FUNC_SPECIFIC(type) \
1631 (TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_FUNC, \
1632 TYPE_MAIN_TYPE (type)->type_specific.func_stuff = (struct func_type *) \
1633 TYPE_ZALLOC (type, \
1634 sizeof (*TYPE_MAIN_TYPE (type)->type_specific.func_stuff)))
1636 #define TYPE_INSTANCE_FLAGS(thistype) (thistype)->instance_flags
1637 #define TYPE_MAIN_TYPE(thistype) (thistype)->main_type
1638 #define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type
1639 #define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
1640 #define TYPE_REFERENCE_TYPE(thistype) (thistype)->reference_type
1641 #define TYPE_RVALUE_REFERENCE_TYPE(thistype) (thistype)->rvalue_reference_type
1642 #define TYPE_CHAIN(thistype) (thistype)->chain
1643 /* * Note that if thistype is a TYPEDEF type, you have to call check_typedef.
1644 But check_typedef does set the TYPE_LENGTH of the TYPEDEF type,
1645 so you only have to call check_typedef once. Since allocate_value
1646 calls check_typedef, TYPE_LENGTH (VALUE_TYPE (X)) is safe. */
1647 #define TYPE_LENGTH(thistype) (thistype)->length
1649 /* * Return the alignment of the type in target addressable memory
1650 units, or 0 if no alignment was specified. */
1651 #define TYPE_RAW_ALIGN(thistype) type_raw_align (thistype)
1653 /* * Return the alignment of the type in target addressable memory
1654 units, or 0 if no alignment was specified. */
1655 extern unsigned type_raw_align (struct type
*);
1657 /* * Return the alignment of the type in target addressable memory
1658 units. Return 0 if the alignment cannot be determined; but note
1659 that this makes an effort to compute the alignment even it it was
1660 not specified in the debug info. */
1661 extern unsigned type_align (struct type
*);
1663 /* * Set the alignment of the type. The alignment must be a power of
1664 2. Returns false if the given value does not fit in the available
1665 space in struct type. */
1666 extern bool set_type_align (struct type
*, ULONGEST
);
1668 /* Property accessors for the type data location. */
1669 #define TYPE_DATA_LOCATION(thistype) \
1670 ((thistype)->dyn_prop (DYN_PROP_DATA_LOCATION))
1671 #define TYPE_DATA_LOCATION_BATON(thistype) \
1672 TYPE_DATA_LOCATION (thistype)->data.baton
1673 #define TYPE_DATA_LOCATION_ADDR(thistype) \
1674 (TYPE_DATA_LOCATION (thistype)->const_val ())
1675 #define TYPE_DATA_LOCATION_KIND(thistype) \
1676 (TYPE_DATA_LOCATION (thistype)->kind ())
1677 #define TYPE_DYNAMIC_LENGTH(thistype) \
1678 ((thistype)->dyn_prop (DYN_PROP_BYTE_SIZE))
1680 /* Property accessors for the type allocated/associated. */
1681 #define TYPE_ALLOCATED_PROP(thistype) \
1682 ((thistype)->dyn_prop (DYN_PROP_ALLOCATED))
1683 #define TYPE_ASSOCIATED_PROP(thistype) \
1684 ((thistype)->dyn_prop (DYN_PROP_ASSOCIATED))
1688 #define TYPE_SELF_TYPE(thistype) internal_type_self_type (thistype)
1689 /* Do not call this, use TYPE_SELF_TYPE. */
1690 extern struct type
*internal_type_self_type (struct type
*);
1691 extern void set_type_self_type (struct type
*, struct type
*);
1693 extern int internal_type_vptr_fieldno (struct type
*);
1694 extern void set_type_vptr_fieldno (struct type
*, int);
1695 extern struct type
*internal_type_vptr_basetype (struct type
*);
1696 extern void set_type_vptr_basetype (struct type
*, struct type
*);
1697 #define TYPE_VPTR_FIELDNO(thistype) internal_type_vptr_fieldno (thistype)
1698 #define TYPE_VPTR_BASETYPE(thistype) internal_type_vptr_basetype (thistype)
1700 #define TYPE_NFN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields
1701 #define TYPE_SPECIFIC_FIELD(thistype) \
1702 TYPE_MAIN_TYPE(thistype)->type_specific_field
1703 /* We need this tap-dance with the TYPE_RAW_SPECIFIC because of the case
1704 where we're trying to print an Ada array using the C language.
1705 In that case, there is no "cplus_stuff", but the C language assumes
1706 that there is. What we do, in that case, is pretend that there is
1707 an implicit one which is the default cplus stuff. */
1708 #define TYPE_CPLUS_SPECIFIC(thistype) \
1709 (!HAVE_CPLUS_STRUCT(thistype) \
1710 ? (struct cplus_struct_type*)&cplus_struct_default \
1711 : TYPE_RAW_CPLUS_SPECIFIC(thistype))
1712 #define TYPE_RAW_CPLUS_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.cplus_stuff
1713 #define TYPE_CPLUS_CALLING_CONVENTION(thistype) \
1714 TYPE_MAIN_TYPE(thistype)->type_specific.cplus_stuff->calling_convention
1715 #define TYPE_FLOATFORMAT(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.floatformat
1716 #define TYPE_GNAT_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.gnat_stuff
1717 #define TYPE_DESCRIPTIVE_TYPE(thistype) TYPE_GNAT_SPECIFIC(thistype)->descriptive_type
1718 #define TYPE_CALLING_CONVENTION(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.func_stuff->calling_convention
1719 #define TYPE_NO_RETURN(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.func_stuff->is_noreturn
1720 #define TYPE_TAIL_CALL_LIST(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.func_stuff->tail_call_list
1721 #define TYPE_BASECLASS(thistype,index) ((thistype)->field (index).type ())
1722 #define TYPE_N_BASECLASSES(thistype) TYPE_CPLUS_SPECIFIC(thistype)->n_baseclasses
1723 #define TYPE_BASECLASS_NAME(thistype,index) TYPE_FIELD_NAME(thistype, index)
1724 #define TYPE_BASECLASS_BITPOS(thistype,index) TYPE_FIELD_BITPOS(thistype,index)
1725 #define BASETYPE_VIA_PUBLIC(thistype, index) \
1726 ((!TYPE_FIELD_PRIVATE(thistype, index)) && (!TYPE_FIELD_PROTECTED(thistype, index)))
1727 #define TYPE_CPLUS_DYNAMIC(thistype) TYPE_CPLUS_SPECIFIC (thistype)->is_dynamic
1729 #define BASETYPE_VIA_VIRTUAL(thistype, index) \
1730 (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
1731 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (index)))
1733 #define FIELD_NAME(thisfld) ((thisfld).name)
1734 #define FIELD_LOC_KIND(thisfld) ((thisfld).loc_kind)
1735 #define FIELD_BITPOS_LVAL(thisfld) ((thisfld).loc.bitpos)
1736 #define FIELD_BITPOS(thisfld) (FIELD_BITPOS_LVAL (thisfld) + 0)
1737 #define FIELD_ENUMVAL_LVAL(thisfld) ((thisfld).loc.enumval)
1738 #define FIELD_ENUMVAL(thisfld) (FIELD_ENUMVAL_LVAL (thisfld) + 0)
1739 #define FIELD_STATIC_PHYSNAME(thisfld) ((thisfld).loc.physname)
1740 #define FIELD_STATIC_PHYSADDR(thisfld) ((thisfld).loc.physaddr)
1741 #define FIELD_DWARF_BLOCK(thisfld) ((thisfld).loc.dwarf_block)
1742 #define SET_FIELD_BITPOS(thisfld, bitpos) \
1743 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_BITPOS, \
1744 FIELD_BITPOS_LVAL (thisfld) = (bitpos))
1745 #define SET_FIELD_ENUMVAL(thisfld, enumval) \
1746 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_ENUMVAL, \
1747 FIELD_ENUMVAL_LVAL (thisfld) = (enumval))
1748 #define SET_FIELD_PHYSNAME(thisfld, name) \
1749 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_PHYSNAME, \
1750 FIELD_STATIC_PHYSNAME (thisfld) = (name))
1751 #define SET_FIELD_PHYSADDR(thisfld, addr) \
1752 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_PHYSADDR, \
1753 FIELD_STATIC_PHYSADDR (thisfld) = (addr))
1754 #define SET_FIELD_DWARF_BLOCK(thisfld, addr) \
1755 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_DWARF_BLOCK, \
1756 FIELD_DWARF_BLOCK (thisfld) = (addr))
1757 #define FIELD_ARTIFICIAL(thisfld) ((thisfld).artificial)
1758 #define FIELD_BITSIZE(thisfld) ((thisfld).bitsize)
1760 #define TYPE_FIELD_NAME(thistype, n) FIELD_NAME((thistype)->field (n))
1761 #define TYPE_FIELD_LOC_KIND(thistype, n) FIELD_LOC_KIND ((thistype)->field (n))
1762 #define TYPE_FIELD_BITPOS(thistype, n) FIELD_BITPOS ((thistype)->field (n))
1763 #define TYPE_FIELD_ENUMVAL(thistype, n) FIELD_ENUMVAL ((thistype)->field (n))
1764 #define TYPE_FIELD_STATIC_PHYSNAME(thistype, n) FIELD_STATIC_PHYSNAME ((thistype)->field (n))
1765 #define TYPE_FIELD_STATIC_PHYSADDR(thistype, n) FIELD_STATIC_PHYSADDR ((thistype)->field (n))
1766 #define TYPE_FIELD_DWARF_BLOCK(thistype, n) FIELD_DWARF_BLOCK ((thistype)->field (n))
1767 #define TYPE_FIELD_ARTIFICIAL(thistype, n) FIELD_ARTIFICIAL((thistype)->field (n))
1768 #define TYPE_FIELD_BITSIZE(thistype, n) FIELD_BITSIZE((thistype)->field (n))
1769 #define TYPE_FIELD_PACKED(thistype, n) (FIELD_BITSIZE((thistype)->field (n))!=0)
1771 #define TYPE_FIELD_PRIVATE_BITS(thistype) \
1772 TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits
1773 #define TYPE_FIELD_PROTECTED_BITS(thistype) \
1774 TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits
1775 #define TYPE_FIELD_IGNORE_BITS(thistype) \
1776 TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits
1777 #define TYPE_FIELD_VIRTUAL_BITS(thistype) \
1778 TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits
1779 #define SET_TYPE_FIELD_PRIVATE(thistype, n) \
1780 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n))
1781 #define SET_TYPE_FIELD_PROTECTED(thistype, n) \
1782 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n))
1783 #define SET_TYPE_FIELD_IGNORE(thistype, n) \
1784 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n))
1785 #define SET_TYPE_FIELD_VIRTUAL(thistype, n) \
1786 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n))
1787 #define TYPE_FIELD_PRIVATE(thistype, n) \
1788 (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits == NULL ? 0 \
1789 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n)))
1790 #define TYPE_FIELD_PROTECTED(thistype, n) \
1791 (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits == NULL ? 0 \
1792 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n)))
1793 #define TYPE_FIELD_IGNORE(thistype, n) \
1794 (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits == NULL ? 0 \
1795 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n)))
1796 #define TYPE_FIELD_VIRTUAL(thistype, n) \
1797 (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
1798 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n)))
1800 #define TYPE_FN_FIELDLISTS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists
1801 #define TYPE_FN_FIELDLIST(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n]
1802 #define TYPE_FN_FIELDLIST1(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].fn_fields
1803 #define TYPE_FN_FIELDLIST_NAME(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].name
1804 #define TYPE_FN_FIELDLIST_LENGTH(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].length
1806 #define TYPE_N_TEMPLATE_ARGUMENTS(thistype) \
1807 TYPE_CPLUS_SPECIFIC (thistype)->n_template_arguments
1808 #define TYPE_TEMPLATE_ARGUMENTS(thistype) \
1809 TYPE_CPLUS_SPECIFIC (thistype)->template_arguments
1810 #define TYPE_TEMPLATE_ARGUMENT(thistype, n) \
1811 TYPE_CPLUS_SPECIFIC (thistype)->template_arguments[n]
1813 #define TYPE_FN_FIELD(thisfn, n) (thisfn)[n]
1814 #define TYPE_FN_FIELD_PHYSNAME(thisfn, n) (thisfn)[n].physname
1815 #define TYPE_FN_FIELD_TYPE(thisfn, n) (thisfn)[n].type
1816 #define TYPE_FN_FIELD_ARGS(thisfn, n) (((thisfn)[n].type)->fields ())
1817 #define TYPE_FN_FIELD_CONST(thisfn, n) ((thisfn)[n].is_const)
1818 #define TYPE_FN_FIELD_VOLATILE(thisfn, n) ((thisfn)[n].is_volatile)
1819 #define TYPE_FN_FIELD_PRIVATE(thisfn, n) ((thisfn)[n].is_private)
1820 #define TYPE_FN_FIELD_PROTECTED(thisfn, n) ((thisfn)[n].is_protected)
1821 #define TYPE_FN_FIELD_ARTIFICIAL(thisfn, n) ((thisfn)[n].is_artificial)
1822 #define TYPE_FN_FIELD_STUB(thisfn, n) ((thisfn)[n].is_stub)
1823 #define TYPE_FN_FIELD_CONSTRUCTOR(thisfn, n) ((thisfn)[n].is_constructor)
1824 #define TYPE_FN_FIELD_FCONTEXT(thisfn, n) ((thisfn)[n].fcontext)
1825 #define TYPE_FN_FIELD_VOFFSET(thisfn, n) ((thisfn)[n].voffset-2)
1826 #define TYPE_FN_FIELD_VIRTUAL_P(thisfn, n) ((thisfn)[n].voffset > 1)
1827 #define TYPE_FN_FIELD_STATIC_P(thisfn, n) ((thisfn)[n].voffset == VOFFSET_STATIC)
1828 #define TYPE_FN_FIELD_DEFAULTED(thisfn, n) ((thisfn)[n].defaulted)
1829 #define TYPE_FN_FIELD_DELETED(thisfn, n) ((thisfn)[n].is_deleted)
1831 /* Accessors for typedefs defined by a class. */
1832 #define TYPE_TYPEDEF_FIELD_ARRAY(thistype) \
1833 TYPE_CPLUS_SPECIFIC (thistype)->typedef_field
1834 #define TYPE_TYPEDEF_FIELD(thistype, n) \
1835 TYPE_CPLUS_SPECIFIC (thistype)->typedef_field[n]
1836 #define TYPE_TYPEDEF_FIELD_NAME(thistype, n) \
1837 TYPE_TYPEDEF_FIELD (thistype, n).name
1838 #define TYPE_TYPEDEF_FIELD_TYPE(thistype, n) \
1839 TYPE_TYPEDEF_FIELD (thistype, n).type
1840 #define TYPE_TYPEDEF_FIELD_COUNT(thistype) \
1841 TYPE_CPLUS_SPECIFIC (thistype)->typedef_field_count
1842 #define TYPE_TYPEDEF_FIELD_PROTECTED(thistype, n) \
1843 TYPE_TYPEDEF_FIELD (thistype, n).is_protected
1844 #define TYPE_TYPEDEF_FIELD_PRIVATE(thistype, n) \
1845 TYPE_TYPEDEF_FIELD (thistype, n).is_private
1847 #define TYPE_NESTED_TYPES_ARRAY(thistype) \
1848 TYPE_CPLUS_SPECIFIC (thistype)->nested_types
1849 #define TYPE_NESTED_TYPES_FIELD(thistype, n) \
1850 TYPE_CPLUS_SPECIFIC (thistype)->nested_types[n]
1851 #define TYPE_NESTED_TYPES_FIELD_NAME(thistype, n) \
1852 TYPE_NESTED_TYPES_FIELD (thistype, n).name
1853 #define TYPE_NESTED_TYPES_FIELD_TYPE(thistype, n) \
1854 TYPE_NESTED_TYPES_FIELD (thistype, n).type
1855 #define TYPE_NESTED_TYPES_COUNT(thistype) \
1856 TYPE_CPLUS_SPECIFIC (thistype)->nested_types_count
1857 #define TYPE_NESTED_TYPES_FIELD_PROTECTED(thistype, n) \
1858 TYPE_NESTED_TYPES_FIELD (thistype, n).is_protected
1859 #define TYPE_NESTED_TYPES_FIELD_PRIVATE(thistype, n) \
1860 TYPE_NESTED_TYPES_FIELD (thistype, n).is_private
1862 #define TYPE_IS_OPAQUE(thistype) \
1863 ((((thistype)->code () == TYPE_CODE_STRUCT) \
1864 || ((thistype)->code () == TYPE_CODE_UNION)) \
1865 && ((thistype)->num_fields () == 0) \
1866 && (!HAVE_CPLUS_STRUCT (thistype) \
1867 || TYPE_NFN_FIELDS (thistype) == 0) \
1868 && ((thistype)->is_stub () || !TYPE_STUB_SUPPORTED (thistype)))
1870 /* * A helper macro that returns the name of a type or "unnamed type"
1871 if the type has no name. */
1873 #define TYPE_SAFE_NAME(type) \
1874 (type->name () != nullptr ? type->name () : _("<unnamed type>"))
1876 /* * A helper macro that returns the name of an error type. If the
1877 type has a name, it is used; otherwise, a default is used. */
1879 #define TYPE_ERROR_NAME(type) \
1880 (type->name () ? type->name () : _("<error type>"))
1882 /* Given TYPE, return its floatformat. */
1883 const struct floatformat
*floatformat_from_type (const struct type
*type
);
1887 /* Integral types. */
1889 /* Implicit size/sign (based on the architecture's ABI). */
1890 struct type
*builtin_void
;
1891 struct type
*builtin_char
;
1892 struct type
*builtin_short
;
1893 struct type
*builtin_int
;
1894 struct type
*builtin_long
;
1895 struct type
*builtin_signed_char
;
1896 struct type
*builtin_unsigned_char
;
1897 struct type
*builtin_unsigned_short
;
1898 struct type
*builtin_unsigned_int
;
1899 struct type
*builtin_unsigned_long
;
1900 struct type
*builtin_bfloat16
;
1901 struct type
*builtin_half
;
1902 struct type
*builtin_float
;
1903 struct type
*builtin_double
;
1904 struct type
*builtin_long_double
;
1905 struct type
*builtin_complex
;
1906 struct type
*builtin_double_complex
;
1907 struct type
*builtin_string
;
1908 struct type
*builtin_bool
;
1909 struct type
*builtin_long_long
;
1910 struct type
*builtin_unsigned_long_long
;
1911 struct type
*builtin_decfloat
;
1912 struct type
*builtin_decdouble
;
1913 struct type
*builtin_declong
;
1915 /* "True" character types.
1916 We use these for the '/c' print format, because c_char is just a
1917 one-byte integral type, which languages less laid back than C
1918 will print as ... well, a one-byte integral type. */
1919 struct type
*builtin_true_char
;
1920 struct type
*builtin_true_unsigned_char
;
1922 /* Explicit sizes - see C9X <intypes.h> for naming scheme. The "int0"
1923 is for when an architecture needs to describe a register that has
1925 struct type
*builtin_int0
;
1926 struct type
*builtin_int8
;
1927 struct type
*builtin_uint8
;
1928 struct type
*builtin_int16
;
1929 struct type
*builtin_uint16
;
1930 struct type
*builtin_int24
;
1931 struct type
*builtin_uint24
;
1932 struct type
*builtin_int32
;
1933 struct type
*builtin_uint32
;
1934 struct type
*builtin_int64
;
1935 struct type
*builtin_uint64
;
1936 struct type
*builtin_int128
;
1937 struct type
*builtin_uint128
;
1939 /* Wide character types. */
1940 struct type
*builtin_char16
;
1941 struct type
*builtin_char32
;
1942 struct type
*builtin_wchar
;
1944 /* Pointer types. */
1946 /* * `pointer to data' type. Some target platforms use an implicitly
1947 {sign,zero} -extended 32-bit ABI pointer on a 64-bit ISA. */
1948 struct type
*builtin_data_ptr
;
1950 /* * `pointer to function (returning void)' type. Harvard
1951 architectures mean that ABI function and code pointers are not
1952 interconvertible. Similarly, since ANSI, C standards have
1953 explicitly said that pointers to functions and pointers to data
1954 are not interconvertible --- that is, you can't cast a function
1955 pointer to void * and back, and expect to get the same value.
1956 However, all function pointer types are interconvertible, so void
1957 (*) () can server as a generic function pointer. */
1959 struct type
*builtin_func_ptr
;
1961 /* * `function returning pointer to function (returning void)' type.
1962 The final void return type is not significant for it. */
1964 struct type
*builtin_func_func
;
1966 /* Special-purpose types. */
1968 /* * This type is used to represent a GDB internal function. */
1970 struct type
*internal_fn
;
1972 /* * This type is used to represent an xmethod. */
1973 struct type
*xmethod
;
1976 /* * Return the type table for the specified architecture. */
1978 extern const struct builtin_type
*builtin_type (struct gdbarch
*gdbarch
);
1980 /* * Per-objfile types used by symbol readers. */
1984 /* Basic types based on the objfile architecture. */
1985 struct type
*builtin_void
;
1986 struct type
*builtin_char
;
1987 struct type
*builtin_short
;
1988 struct type
*builtin_int
;
1989 struct type
*builtin_long
;
1990 struct type
*builtin_long_long
;
1991 struct type
*builtin_signed_char
;
1992 struct type
*builtin_unsigned_char
;
1993 struct type
*builtin_unsigned_short
;
1994 struct type
*builtin_unsigned_int
;
1995 struct type
*builtin_unsigned_long
;
1996 struct type
*builtin_unsigned_long_long
;
1997 struct type
*builtin_half
;
1998 struct type
*builtin_float
;
1999 struct type
*builtin_double
;
2000 struct type
*builtin_long_double
;
2002 /* * This type is used to represent symbol addresses. */
2003 struct type
*builtin_core_addr
;
2005 /* * This type represents a type that was unrecognized in symbol
2007 struct type
*builtin_error
;
2009 /* * Types used for symbols with no debug information. */
2010 struct type
*nodebug_text_symbol
;
2011 struct type
*nodebug_text_gnu_ifunc_symbol
;
2012 struct type
*nodebug_got_plt_symbol
;
2013 struct type
*nodebug_data_symbol
;
2014 struct type
*nodebug_unknown_symbol
;
2015 struct type
*nodebug_tls_symbol
;
2018 /* * Return the type table for the specified objfile. */
2020 extern const struct objfile_type
*objfile_type (struct objfile
*objfile
);
2022 /* Explicit floating-point formats. See "floatformat.h". */
2023 extern const struct floatformat
*floatformats_ieee_half
[BFD_ENDIAN_UNKNOWN
];
2024 extern const struct floatformat
*floatformats_ieee_single
[BFD_ENDIAN_UNKNOWN
];
2025 extern const struct floatformat
*floatformats_ieee_double
[BFD_ENDIAN_UNKNOWN
];
2026 extern const struct floatformat
*floatformats_ieee_double_littlebyte_bigword
[BFD_ENDIAN_UNKNOWN
];
2027 extern const struct floatformat
*floatformats_i387_ext
[BFD_ENDIAN_UNKNOWN
];
2028 extern const struct floatformat
*floatformats_m68881_ext
[BFD_ENDIAN_UNKNOWN
];
2029 extern const struct floatformat
*floatformats_arm_ext
[BFD_ENDIAN_UNKNOWN
];
2030 extern const struct floatformat
*floatformats_ia64_spill
[BFD_ENDIAN_UNKNOWN
];
2031 extern const struct floatformat
*floatformats_ia64_quad
[BFD_ENDIAN_UNKNOWN
];
2032 extern const struct floatformat
*floatformats_vax_f
[BFD_ENDIAN_UNKNOWN
];
2033 extern const struct floatformat
*floatformats_vax_d
[BFD_ENDIAN_UNKNOWN
];
2034 extern const struct floatformat
*floatformats_ibm_long_double
[BFD_ENDIAN_UNKNOWN
];
2035 extern const struct floatformat
*floatformats_bfloat16
[BFD_ENDIAN_UNKNOWN
];
2037 /* Allocate space for storing data associated with a particular
2038 type. We ensure that the space is allocated using the same
2039 mechanism that was used to allocate the space for the type
2040 structure itself. I.e. if the type is on an objfile's
2041 objfile_obstack, then the space for data associated with that type
2042 will also be allocated on the objfile_obstack. If the type is
2043 associated with a gdbarch, then the space for data associated with that
2044 type will also be allocated on the gdbarch_obstack.
2046 If a type is not associated with neither an objfile or a gdbarch then
2047 you should not use this macro to allocate space for data, instead you
2048 should call xmalloc directly, and ensure the memory is correctly freed
2049 when it is no longer needed. */
2051 #define TYPE_ALLOC(t,size) \
2052 (obstack_alloc ((TYPE_OBJFILE_OWNED (t) \
2053 ? &TYPE_OBJFILE (t)->objfile_obstack \
2054 : gdbarch_obstack (TYPE_OWNER (t).gdbarch)), \
2058 /* See comment on TYPE_ALLOC. */
2060 #define TYPE_ZALLOC(t,size) (memset (TYPE_ALLOC (t, size), 0, size))
2062 /* Use alloc_type to allocate a type owned by an objfile. Use
2063 alloc_type_arch to allocate a type owned by an architecture. Use
2064 alloc_type_copy to allocate a type with the same owner as a
2065 pre-existing template type, no matter whether objfile or
2067 extern struct type
*alloc_type (struct objfile
*);
2068 extern struct type
*alloc_type_arch (struct gdbarch
*);
2069 extern struct type
*alloc_type_copy (const struct type
*);
2071 /* * Return the type's architecture. For types owned by an
2072 architecture, that architecture is returned. For types owned by an
2073 objfile, that objfile's architecture is returned. */
2075 extern struct gdbarch
*get_type_arch (const struct type
*);
2077 /* * This returns the target type (or NULL) of TYPE, also skipping
2080 extern struct type
*get_target_type (struct type
*type
);
2082 /* Return the equivalent of TYPE_LENGTH, but in number of target
2083 addressable memory units of the associated gdbarch instead of bytes. */
2085 extern unsigned int type_length_units (struct type
*type
);
2087 /* * Helper function to construct objfile-owned types. */
2089 extern struct type
*init_type (struct objfile
*, enum type_code
, int,
2091 extern struct type
*init_integer_type (struct objfile
*, int, int,
2093 extern struct type
*init_character_type (struct objfile
*, int, int,
2095 extern struct type
*init_boolean_type (struct objfile
*, int, int,
2097 extern struct type
*init_float_type (struct objfile
*, int, const char *,
2098 const struct floatformat
**,
2099 enum bfd_endian
= BFD_ENDIAN_UNKNOWN
);
2100 extern struct type
*init_decfloat_type (struct objfile
*, int, const char *);
2101 extern struct type
*init_complex_type (const char *, struct type
*);
2102 extern struct type
*init_pointer_type (struct objfile
*, int, const char *,
2105 /* Helper functions to construct architecture-owned types. */
2106 extern struct type
*arch_type (struct gdbarch
*, enum type_code
, int,
2108 extern struct type
*arch_integer_type (struct gdbarch
*, int, int,
2110 extern struct type
*arch_character_type (struct gdbarch
*, int, int,
2112 extern struct type
*arch_boolean_type (struct gdbarch
*, int, int,
2114 extern struct type
*arch_float_type (struct gdbarch
*, int, const char *,
2115 const struct floatformat
**);
2116 extern struct type
*arch_decfloat_type (struct gdbarch
*, int, const char *);
2117 extern struct type
*arch_pointer_type (struct gdbarch
*, int, const char *,
2120 /* Helper functions to construct a struct or record type. An
2121 initially empty type is created using arch_composite_type().
2122 Fields are then added using append_composite_type_field*(). A union
2123 type has its size set to the largest field. A struct type has each
2124 field packed against the previous. */
2126 extern struct type
*arch_composite_type (struct gdbarch
*gdbarch
,
2127 const char *name
, enum type_code code
);
2128 extern void append_composite_type_field (struct type
*t
, const char *name
,
2129 struct type
*field
);
2130 extern void append_composite_type_field_aligned (struct type
*t
,
2134 struct field
*append_composite_type_field_raw (struct type
*t
, const char *name
,
2135 struct type
*field
);
2137 /* Helper functions to construct a bit flags type. An initially empty
2138 type is created using arch_flag_type(). Flags are then added using
2139 append_flag_type_field() and append_flag_type_flag(). */
2140 extern struct type
*arch_flags_type (struct gdbarch
*gdbarch
,
2141 const char *name
, int bit
);
2142 extern void append_flags_type_field (struct type
*type
,
2143 int start_bitpos
, int nr_bits
,
2144 struct type
*field_type
, const char *name
);
2145 extern void append_flags_type_flag (struct type
*type
, int bitpos
,
2148 extern void make_vector_type (struct type
*array_type
);
2149 extern struct type
*init_vector_type (struct type
*elt_type
, int n
);
2151 extern struct type
*lookup_reference_type (struct type
*, enum type_code
);
2152 extern struct type
*lookup_lvalue_reference_type (struct type
*);
2153 extern struct type
*lookup_rvalue_reference_type (struct type
*);
2156 extern struct type
*make_reference_type (struct type
*, struct type
**,
2159 extern struct type
*make_cv_type (int, int, struct type
*, struct type
**);
2161 extern struct type
*make_restrict_type (struct type
*);
2163 extern struct type
*make_unqualified_type (struct type
*);
2165 extern struct type
*make_atomic_type (struct type
*);
2167 extern void replace_type (struct type
*, struct type
*);
2169 extern int address_space_name_to_int (struct gdbarch
*, const char *);
2171 extern const char *address_space_int_to_name (struct gdbarch
*, int);
2173 extern struct type
*make_type_with_address_space (struct type
*type
,
2174 int space_identifier
);
2176 extern struct type
*lookup_memberptr_type (struct type
*, struct type
*);
2178 extern struct type
*lookup_methodptr_type (struct type
*);
2180 extern void smash_to_method_type (struct type
*type
, struct type
*self_type
,
2181 struct type
*to_type
, struct field
*args
,
2182 int nargs
, int varargs
);
2184 extern void smash_to_memberptr_type (struct type
*, struct type
*,
2187 extern void smash_to_methodptr_type (struct type
*, struct type
*);
2189 extern struct type
*allocate_stub_method (struct type
*);
2191 extern const char *type_name_or_error (struct type
*type
);
2195 /* The field of the element, or NULL if no element was found. */
2196 struct field
*field
;
2198 /* The bit offset of the element in the parent structure. */
2202 /* Given a type TYPE, lookup the field and offset of the component named
2205 TYPE can be either a struct or union, or a pointer or reference to
2206 a struct or union. If it is a pointer or reference, its target
2207 type is automatically used. Thus '.' and '->' are interchangable,
2208 as specified for the definitions of the expression element types
2209 STRUCTOP_STRUCT and STRUCTOP_PTR.
2211 If NOERR is nonzero, the returned structure will have field set to
2212 NULL if there is no component named NAME.
2214 If the component NAME is a field in an anonymous substructure of
2215 TYPE, the returned offset is a "global" offset relative to TYPE
2216 rather than an offset within the substructure. */
2218 extern struct_elt
lookup_struct_elt (struct type
*, const char *, int);
2220 /* Given a type TYPE, lookup the type of the component named NAME.
2222 TYPE can be either a struct or union, or a pointer or reference to
2223 a struct or union. If it is a pointer or reference, its target
2224 type is automatically used. Thus '.' and '->' are interchangable,
2225 as specified for the definitions of the expression element types
2226 STRUCTOP_STRUCT and STRUCTOP_PTR.
2228 If NOERR is nonzero, return NULL if there is no component named
2231 extern struct type
*lookup_struct_elt_type (struct type
*, const char *, int);
2233 extern struct type
*make_pointer_type (struct type
*, struct type
**);
2235 extern struct type
*lookup_pointer_type (struct type
*);
2237 extern struct type
*make_function_type (struct type
*, struct type
**);
2239 extern struct type
*lookup_function_type (struct type
*);
2241 extern struct type
*lookup_function_type_with_arguments (struct type
*,
2245 extern struct type
*create_static_range_type (struct type
*, struct type
*,
2249 extern struct type
*create_array_type_with_stride
2250 (struct type
*, struct type
*, struct type
*,
2251 struct dynamic_prop
*, unsigned int);
2253 extern struct type
*create_range_type (struct type
*, struct type
*,
2254 const struct dynamic_prop
*,
2255 const struct dynamic_prop
*,
2258 /* Like CREATE_RANGE_TYPE but also sets up a stride. When BYTE_STRIDE_P
2259 is true the value in STRIDE is a byte stride, otherwise STRIDE is a bit
2262 extern struct type
* create_range_type_with_stride
2263 (struct type
*result_type
, struct type
*index_type
,
2264 const struct dynamic_prop
*low_bound
,
2265 const struct dynamic_prop
*high_bound
, LONGEST bias
,
2266 const struct dynamic_prop
*stride
, bool byte_stride_p
);
2268 extern struct type
*create_array_type (struct type
*, struct type
*,
2271 extern struct type
*lookup_array_range_type (struct type
*, LONGEST
, LONGEST
);
2273 extern struct type
*create_string_type (struct type
*, struct type
*,
2275 extern struct type
*lookup_string_range_type (struct type
*, LONGEST
, LONGEST
);
2277 extern struct type
*create_set_type (struct type
*, struct type
*);
2279 extern struct type
*lookup_unsigned_typename (const struct language_defn
*,
2282 extern struct type
*lookup_signed_typename (const struct language_defn
*,
2285 extern void get_unsigned_type_max (struct type
*, ULONGEST
*);
2287 extern void get_signed_type_minmax (struct type
*, LONGEST
*, LONGEST
*);
2289 /* * Resolve all dynamic values of a type e.g. array bounds to static values.
2290 ADDR specifies the location of the variable the type is bound to.
2291 If TYPE has no dynamic properties return TYPE; otherwise a new type with
2292 static properties is returned. */
2293 extern struct type
*resolve_dynamic_type
2294 (struct type
*type
, gdb::array_view
<const gdb_byte
> valaddr
,
2297 /* * Predicate if the type has dynamic values, which are not resolved yet. */
2298 extern int is_dynamic_type (struct type
*type
);
2300 extern struct type
*check_typedef (struct type
*);
2302 extern void check_stub_method_group (struct type
*, int);
2304 extern char *gdb_mangle_name (struct type
*, int, int);
2306 extern struct type
*lookup_typename (const struct language_defn
*,
2307 const char *, const struct block
*, int);
2309 extern struct type
*lookup_template_type (const char *, struct type
*,
2310 const struct block
*);
2312 extern int get_vptr_fieldno (struct type
*, struct type
**);
2314 extern int get_discrete_bounds (struct type
*, LONGEST
*, LONGEST
*);
2316 extern int get_array_bounds (struct type
*type
, LONGEST
*low_bound
,
2317 LONGEST
*high_bound
);
2319 extern int discrete_position (struct type
*type
, LONGEST val
, LONGEST
*pos
);
2321 extern int class_types_same_p (const struct type
*, const struct type
*);
2323 extern int is_ancestor (struct type
*, struct type
*);
2325 extern int is_public_ancestor (struct type
*, struct type
*);
2327 extern int is_unique_ancestor (struct type
*, struct value
*);
2329 /* Overload resolution */
2331 /* * Badness if parameter list length doesn't match arg list length. */
2332 extern const struct rank LENGTH_MISMATCH_BADNESS
;
2334 /* * Dummy badness value for nonexistent parameter positions. */
2335 extern const struct rank TOO_FEW_PARAMS_BADNESS
;
2336 /* * Badness if no conversion among types. */
2337 extern const struct rank INCOMPATIBLE_TYPE_BADNESS
;
2339 /* * Badness of an exact match. */
2340 extern const struct rank EXACT_MATCH_BADNESS
;
2342 /* * Badness of integral promotion. */
2343 extern const struct rank INTEGER_PROMOTION_BADNESS
;
2344 /* * Badness of floating promotion. */
2345 extern const struct rank FLOAT_PROMOTION_BADNESS
;
2346 /* * Badness of converting a derived class pointer
2347 to a base class pointer. */
2348 extern const struct rank BASE_PTR_CONVERSION_BADNESS
;
2349 /* * Badness of integral conversion. */
2350 extern const struct rank INTEGER_CONVERSION_BADNESS
;
2351 /* * Badness of floating conversion. */
2352 extern const struct rank FLOAT_CONVERSION_BADNESS
;
2353 /* * Badness of integer<->floating conversions. */
2354 extern const struct rank INT_FLOAT_CONVERSION_BADNESS
;
2355 /* * Badness of conversion of pointer to void pointer. */
2356 extern const struct rank VOID_PTR_CONVERSION_BADNESS
;
2357 /* * Badness of conversion to boolean. */
2358 extern const struct rank BOOL_CONVERSION_BADNESS
;
2359 /* * Badness of converting derived to base class. */
2360 extern const struct rank BASE_CONVERSION_BADNESS
;
2361 /* * Badness of converting from non-reference to reference. Subrank
2362 is the type of reference conversion being done. */
2363 extern const struct rank REFERENCE_CONVERSION_BADNESS
;
2364 extern const struct rank REFERENCE_SEE_THROUGH_BADNESS
;
2365 /* * Conversion to rvalue reference. */
2366 #define REFERENCE_CONVERSION_RVALUE 1
2367 /* * Conversion to const lvalue reference. */
2368 #define REFERENCE_CONVERSION_CONST_LVALUE 2
2370 /* * Badness of converting integer 0 to NULL pointer. */
2371 extern const struct rank NULL_POINTER_CONVERSION
;
2372 /* * Badness of cv-conversion. Subrank is a flag describing the conversions
2374 extern const struct rank CV_CONVERSION_BADNESS
;
2375 #define CV_CONVERSION_CONST 1
2376 #define CV_CONVERSION_VOLATILE 2
2378 /* Non-standard conversions allowed by the debugger */
2380 /* * Converting a pointer to an int is usually OK. */
2381 extern const struct rank NS_POINTER_CONVERSION_BADNESS
;
2383 /* * Badness of converting a (non-zero) integer constant
2385 extern const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS
;
2387 extern struct rank
sum_ranks (struct rank a
, struct rank b
);
2388 extern int compare_ranks (struct rank a
, struct rank b
);
2390 extern int compare_badness (const badness_vector
&,
2391 const badness_vector
&);
2393 extern badness_vector
rank_function (gdb::array_view
<type
*> parms
,
2394 gdb::array_view
<value
*> args
);
2396 extern struct rank
rank_one_type (struct type
*, struct type
*,
2399 extern void recursive_dump_type (struct type
*, int);
2401 extern int field_is_static (struct field
*);
2405 extern void print_scalar_formatted (const gdb_byte
*, struct type
*,
2406 const struct value_print_options
*,
2407 int, struct ui_file
*);
2409 extern int can_dereference (struct type
*);
2411 extern int is_integral_type (struct type
*);
2413 extern int is_floating_type (struct type
*);
2415 extern int is_scalar_type (struct type
*type
);
2417 extern int is_scalar_type_recursive (struct type
*);
2419 extern int class_or_union_p (const struct type
*);
2421 extern void maintenance_print_type (const char *, int);
2423 extern htab_t
create_copied_types_hash (struct objfile
*objfile
);
2425 extern struct type
*copy_type_recursive (struct objfile
*objfile
,
2427 htab_t copied_types
);
2429 extern struct type
*copy_type (const struct type
*type
);
2431 extern bool types_equal (struct type
*, struct type
*);
2433 extern bool types_deeply_equal (struct type
*, struct type
*);
2435 extern int type_not_allocated (const struct type
*type
);
2437 extern int type_not_associated (const struct type
*type
);
2439 /* * When the type includes explicit byte ordering, return that.
2440 Otherwise, the byte ordering from gdbarch_byte_order for
2441 get_type_arch is returned. */
2443 extern enum bfd_endian
type_byte_order (const struct type
*type
);
2445 /* A flag to enable printing of debugging information of C++
2448 extern unsigned int overload_debug
;
2450 #endif /* GDBTYPES_H */