/* Internal type definitions for GDB.
- Copyright (C) 1992-2020 Free Software Foundation, Inc.
+ Copyright (C) 1992-2021 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
#include "hashtab.h"
#include "gdbsupport/array-view.h"
+#include "gdbsupport/gdb_optional.h"
#include "gdbsupport/offset-type.h"
#include "gdbsupport/enum-flags.h"
#include "gdbsupport/underlying.h"
#include "gdbsupport/print-utils.h"
#include "dwarf2.h"
#include "gdb_obstack.h"
+#include "gmp-utils.h"
/* Forward declarations for prototypes. */
struct field;
TYPE_CODE_INTERNAL_FUNCTION,
/* * Methods implemented in extension languages. */
- TYPE_CODE_XMETHOD
+ TYPE_CODE_XMETHOD,
+
+ /* * Fixed Point type. */
+ TYPE_CODE_FIXED_POINT,
};
/* * Some bits for the type's instance_flags word. See the macros
/* * Not textual. By default, GDB treats all single byte integers as
characters (or elements of strings) unless this flag is set. */
-#define TYPE_NOTTEXT(t) (TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_NOTTEXT)
-
-/* * Type owner. If TYPE_OBJFILE_OWNED is true, the type is owned by
- the objfile retrieved as TYPE_OBJFILE. Otherwise, the type is
- owned by an architecture; TYPE_OBJFILE is NULL in this case. */
-
-#define TYPE_OBJFILE_OWNED(t) (TYPE_MAIN_TYPE (t)->flag_objfile_owned)
-#define TYPE_OWNER(t) TYPE_MAIN_TYPE(t)->owner
-#define TYPE_OBJFILE(t) (TYPE_OBJFILE_OWNED(t)? TYPE_OWNER(t).objfile : NULL)
-
-/* * True if this type was declared using the "class" keyword. This is
- only valid for C++ structure and enum types. If false, a structure
- was declared as a "struct"; if true it was declared "class". For
- enum types, this is true when "enum class" or "enum struct" was
- used to declare the type.. */
-
-#define TYPE_DECLARED_CLASS(t) (TYPE_MAIN_TYPE (t)->flag_declared_class)
-
-/* * True if this type is a "flag" enum. A flag enum is one where all
- the values are pairwise disjoint when "and"ed together. This
- affects how enum values are printed. */
-
-#define TYPE_FLAG_ENUM(t) (TYPE_MAIN_TYPE (t)->flag_flag_enum)
+#define TYPE_NOTTEXT(t) (((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_NOTTEXT)
/* * Constant type. If this is set, the corresponding type has a
const modifier. */
-#define TYPE_CONST(t) ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_CONST) != 0)
+#define TYPE_CONST(t) ((((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_CONST) != 0)
/* * Volatile type. If this is set, the corresponding type has a
volatile modifier. */
#define TYPE_VOLATILE(t) \
- ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_VOLATILE) != 0)
+ ((((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_VOLATILE) != 0)
/* * Restrict type. If this is set, the corresponding type has a
restrict modifier. */
#define TYPE_RESTRICT(t) \
- ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_RESTRICT) != 0)
+ ((((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_RESTRICT) != 0)
/* * Atomic type. If this is set, the corresponding type has an
_Atomic modifier. */
#define TYPE_ATOMIC(t) \
- ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_ATOMIC) != 0)
+ ((((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_ATOMIC) != 0)
/* * True if this type represents either an lvalue or lvalue reference type. */
is instruction space, and for data objects is data memory. */
#define TYPE_CODE_SPACE(t) \
- ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_CODE_SPACE) != 0)
+ ((((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_CODE_SPACE) != 0)
#define TYPE_DATA_SPACE(t) \
- ((TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_DATA_SPACE) != 0)
+ ((((t)->instance_flags ()) & TYPE_INSTANCE_FLAG_DATA_SPACE) != 0)
/* * Address class flags. Some environments provide for pointers
whose size is different from that of a normal pointer or address
target specific ways to represent these different types of address
classes. */
-#define TYPE_ADDRESS_CLASS_1(t) (TYPE_INSTANCE_FLAGS(t) \
- & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1)
-#define TYPE_ADDRESS_CLASS_2(t) (TYPE_INSTANCE_FLAGS(t) \
+#define TYPE_ADDRESS_CLASS_1(t) (((t)->instance_flags ()) \
+ & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1)
+#define TYPE_ADDRESS_CLASS_2(t) (((t)->instance_flags ()) \
& TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2)
#define TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL \
(TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2)
-#define TYPE_ADDRESS_CLASS_ALL(t) (TYPE_INSTANCE_FLAGS(t) \
+#define TYPE_ADDRESS_CLASS_ALL(t) (((t)->instance_flags ()) \
& TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
/* * Information about a single discriminant. */
PROP_LOCLIST, /* Location list. */
PROP_VARIANT_PARTS, /* Variant parts. */
PROP_TYPE, /* Type. */
+ PROP_VARIABLE_NAME, /* Variable name. */
};
union dynamic_prop_data
rewrite the property's kind and set this field. */
struct type *original_type;
+
+ /* Name of a variable to look up; the variable holds the value of
+ this property. */
+
+ const char *variable_name;
};
/* * Used to store a dynamic property. */
m_data.original_type = original_type;
}
+ /* Return the name of the variable that holds this property's value.
+ Only valid for PROP_VARIABLE_NAME. */
+ const char *variable_name () const
+ {
+ gdb_assert (m_kind == PROP_VARIABLE_NAME);
+ return m_data.variable_name;
+ }
+
+ /* Set the name of the variable that holds this property's value,
+ and set this property to be of kind PROP_VARIABLE_NAME. */
+ void set_variable_name (const char *name)
+ {
+ m_kind = PROP_VARIABLE_NAME;
+ m_data.variable_name = name;
+ }
+
/* Determine which field of the union dynamic_prop.data is used. */
enum dynamic_prop_kind m_kind;
TYPE_SPECIFIC_FLOATFORMAT,
/* Note: This is used by TYPE_CODE_FUNC and TYPE_CODE_METHOD. */
TYPE_SPECIFIC_FUNC,
- TYPE_SPECIFIC_SELF_TYPE
+ TYPE_SPECIFIC_SELF_TYPE,
+ TYPE_SPECIFIC_INT,
+ TYPE_SPECIFIC_FIXED_POINT,
};
union type_owner
is a member of. */
struct type *self_type;
+
+ /* * For TYPE_CODE_FIXED_POINT types, the info necessary to decode
+ values of that type. */
+ struct fixed_point_type_info *fixed_point_info;
+
+ /* * An integer-like scalar type may be stored in just part of its
+ enclosing storage bytes. This structure describes this
+ situation. */
+ struct
+ {
+ /* * The bit size of the integer. This can be 0. For integers
+ that fill their storage (the ordinary case), this field holds
+ the byte size times 8. */
+ unsigned short bit_size;
+ /* * The bit offset of the integer. This is ordinarily 0, and can
+ only be non-zero if the bit size is less than the storage
+ size. */
+ unsigned short bit_offset;
+ } int_stuff;
};
/* * Main structure representing a type in GDB.
unsigned int m_flag_stub_supported : 1;
unsigned int m_flag_gnu_ifunc : 1;
unsigned int m_flag_fixed_instance : 1;
- unsigned int flag_objfile_owned : 1;
+ unsigned int m_flag_objfile_owned : 1;
unsigned int m_flag_endianity_not_default : 1;
/* * True if this type was declared with "class" rather than
"struct". */
- unsigned int flag_declared_class : 1;
+ unsigned int m_flag_declared_class : 1;
/* * True if this is an enum type with disjoint values. This
affects how the enum is printed. */
- unsigned int flag_flag_enum : 1;
+ unsigned int m_flag_flag_enum : 1;
/* * A discriminant telling us which field of the type_specific
union is being used for this type, if any. */
this is somewhat ugly, but without major overhaul of the internal
type system, it can't be avoided for now. */
- union type_owner owner;
+ union type_owner m_owner;
/* * For a pointer type, describes the type of object pointed to.
- For an array type, describes the type of the elements.
this->main_type->m_flag_endianity_not_default = endianity_is_not_default;
}
+
+ /* True if this type was declared using the "class" keyword. This is
+ only valid for C++ structure and enum types. If false, a structure
+ was declared as a "struct"; if true it was declared "class". For
+ enum types, this is true when "enum class" or "enum struct" was
+ used to declare the type. */
+
+ bool is_declared_class () const
+ {
+ return this->main_type->m_flag_declared_class;
+ }
+
+ void set_is_declared_class (bool is_declared_class) const
+ {
+ this->main_type->m_flag_declared_class = is_declared_class;
+ }
+
+ /* True if this type is a "flag" enum. A flag enum is one where all
+ the values are pairwise disjoint when "and"ed together. This
+ affects how enum values are printed. */
+
+ bool is_flag_enum () const
+ {
+ return this->main_type->m_flag_flag_enum;
+ }
+
+ void set_is_flag_enum (bool is_flag_enum)
+ {
+ this->main_type->m_flag_flag_enum = is_flag_enum;
+ }
+
+ /* * Assuming that THIS is a TYPE_CODE_FIXED_POINT, return a reference
+ to this type's fixed_point_info. */
+
+ struct fixed_point_type_info &fixed_point_info () const
+ {
+ gdb_assert (this->code () == TYPE_CODE_FIXED_POINT);
+ gdb_assert (this->main_type->type_specific.fixed_point_info != nullptr);
+
+ return *this->main_type->type_specific.fixed_point_info;
+ }
+
+ /* * Assuming that THIS is a TYPE_CODE_FIXED_POINT, set this type's
+ fixed_point_info to INFO. */
+
+ void set_fixed_point_info (struct fixed_point_type_info *info) const
+ {
+ gdb_assert (this->code () == TYPE_CODE_FIXED_POINT);
+
+ this->main_type->type_specific.fixed_point_info = info;
+ }
+
+ /* * Assuming that THIS is a TYPE_CODE_FIXED_POINT, return its base type.
+
+ In other words, this returns the type after having peeled all
+ intermediate type layers (such as TYPE_CODE_RANGE, for instance).
+ The TYPE_CODE of the type returned is guaranteed to be
+ a TYPE_CODE_FIXED_POINT. */
+
+ struct type *fixed_point_type_base_type ();
+
+ /* * Assuming that THIS is a TYPE_CODE_FIXED_POINT, return its scaling
+ factor. */
+
+ const gdb_mpq &fixed_point_scaling_factor ();
+
/* * Return the dynamic property of the requested KIND from this type's
list of dynamic properties. */
dynamic_prop *dyn_prop (dynamic_prop_node_kind kind) const;
/* * Remove dynamic property of kind KIND from this type, if it exists. */
void remove_dyn_prop (dynamic_prop_node_kind kind);
+ /* Return true if this type is owned by an objfile. Return false if it is
+ owned by an architecture. */
+ bool is_objfile_owned () const
+ {
+ return this->main_type->m_flag_objfile_owned;
+ }
+
+ /* Set the owner of the type to be OBJFILE. */
+ void set_owner (objfile *objfile)
+ {
+ gdb_assert (objfile != nullptr);
+
+ this->main_type->m_owner.objfile = objfile;
+ this->main_type->m_flag_objfile_owned = true;
+ }
+
+ /* Set the owner of the type to be ARCH. */
+ void set_owner (gdbarch *arch)
+ {
+ gdb_assert (arch != nullptr);
+
+ this->main_type->m_owner.gdbarch = arch;
+ this->main_type->m_flag_objfile_owned = false;
+ }
+
+ /* Return the objfile owner of this type.
+
+ Return nullptr if this type is not objfile-owned. */
+ struct objfile *objfile_owner () const
+ {
+ if (!this->is_objfile_owned ())
+ return nullptr;
+
+ return this->main_type->m_owner.objfile;
+ }
+
+ /* Return the gdbarch owner of this type.
+
+ Return nullptr if this type is not gdbarch-owned. */
+ gdbarch *arch_owner () const
+ {
+ if (this->is_objfile_owned ())
+ return nullptr;
+
+ return this->main_type->m_owner.gdbarch;
+ }
+
+ /* Return the type's architecture. For types owned by an
+ architecture, that architecture is returned. For types owned by an
+ objfile, that objfile's architecture is returned.
+
+ The return value is always non-nullptr. */
+ gdbarch *arch () const;
+
+ /* * Return true if this is an integer type whose logical (bit) size
+ differs from its storage size; false otherwise. Always return
+ false for non-integer (i.e., non-TYPE_SPECIFIC_INT) types. */
+ bool bit_size_differs_p () const
+ {
+ return (main_type->type_specific_field == TYPE_SPECIFIC_INT
+ && main_type->type_specific.int_stuff.bit_size != 8 * length);
+ }
+
+ /* * Return the logical (bit) size for this integer type. Only
+ valid for integer (TYPE_SPECIFIC_INT) types. */
+ unsigned short bit_size () const
+ {
+ gdb_assert (main_type->type_specific_field == TYPE_SPECIFIC_INT);
+ return main_type->type_specific.int_stuff.bit_size;
+ }
+
+ /* * Return the bit offset for this integer type. Only valid for
+ integer (TYPE_SPECIFIC_INT) types. */
+ unsigned short bit_offset () const
+ {
+ gdb_assert (main_type->type_specific_field == TYPE_SPECIFIC_INT);
+ return main_type->type_specific.int_stuff.bit_offset;
+ }
+
/* * Type that is a pointer to this type.
NULL if no such pointer-to type is known yet.
The debugger may add the address of such a type
struct call_site_parameter parameter[1];
};
+/* The type-specific info for TYPE_CODE_FIXED_POINT types. */
+
+struct fixed_point_type_info
+{
+ /* The fixed point type's scaling factor. */
+ gdb_mpq scaling_factor;
+};
+
/* * The default value of TYPE_CPLUS_SPECIFIC(T) points to this shared
static structure. */
TYPE_ZALLOC (type, \
sizeof (*TYPE_MAIN_TYPE (type)->type_specific.func_stuff)))
-#define TYPE_INSTANCE_FLAGS(thistype) ((thistype)->instance_flags ())
+/* "struct fixed_point_type_info" has a field that has a destructor.
+ See allocate_fixed_point_type_info to understand how this is
+ handled. */
+#define INIT_FIXED_POINT_SPECIFIC(type) \
+ (TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_FIXED_POINT, \
+ allocate_fixed_point_type_info (type))
+
#define TYPE_MAIN_TYPE(thistype) (thistype)->main_type
#define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type
#define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
when it is no longer needed. */
#define TYPE_ALLOC(t,size) \
- (obstack_alloc ((TYPE_OBJFILE_OWNED (t) \
- ? &TYPE_OBJFILE (t)->objfile_obstack \
- : gdbarch_obstack (TYPE_OWNER (t).gdbarch)), \
- size))
+ (obstack_alloc (((t)->is_objfile_owned () \
+ ? &((t)->objfile_owner ()->objfile_obstack) \
+ : gdbarch_obstack ((t)->arch_owner ())), \
+ size))
/* See comment on TYPE_ALLOC. */
extern struct type *alloc_type_arch (struct gdbarch *);
extern struct type *alloc_type_copy (const struct type *);
-/* * Return the type's architecture. For types owned by an
- architecture, that architecture is returned. For types owned by an
- objfile, that objfile's architecture is returned. */
-
-extern struct gdbarch *get_type_arch (const struct type *);
-
/* * This returns the target type (or NULL) of TYPE, also skipping
past typedefs. */
const struct floatformat **,
enum bfd_endian = BFD_ENDIAN_UNKNOWN);
extern struct type *init_decfloat_type (struct objfile *, int, const char *);
+extern bool can_create_complex_type (struct type *);
extern struct type *init_complex_type (const char *, struct type *);
extern struct type *init_pointer_type (struct objfile *, int, const char *,
struct type *);
+extern struct type *init_fixed_point_type (struct objfile *, int, int,
+ const char *);
/* Helper functions to construct architecture-owned types. */
extern struct type *arch_type (struct gdbarch *, enum type_code, int,
extern struct type *make_reference_type (struct type *, struct type **,
- enum type_code);
+ enum type_code);
extern struct type *make_cv_type (int, int, struct type *, struct type **);
extern void replace_type (struct type *, struct type *);
-extern type_instance_flags address_space_name_to_int (struct gdbarch *,
- const char *);
+extern type_instance_flags address_space_name_to_type_instance_flags
+ (struct gdbarch *, const char *);
-extern const char *address_space_int_to_name (struct gdbarch *,
- type_instance_flags);
+extern const char *address_space_type_instance_flags_to_name
+ (struct gdbarch *, type_instance_flags);
extern struct type *make_type_with_address_space
(struct type *type, type_instance_flags space_identifier);
extern int get_vptr_fieldno (struct type *, struct type **);
-extern int get_discrete_bounds (struct type *, LONGEST *, LONGEST *);
+/* Set *LOWP and *HIGHP to the lower and upper bounds of discrete type
+ TYPE.
+
+ Return true if the two bounds are available, false otherwise. */
+
+extern bool get_discrete_bounds (struct type *type, LONGEST *lowp,
+ LONGEST *highp);
+
+/* If TYPE's low bound is a known constant, return it, else return nullopt. */
+
+extern gdb::optional<LONGEST> get_discrete_low_bound (struct type *type);
+
+/* If TYPE's high bound is a known constant, return it, else return nullopt. */
-extern int get_array_bounds (struct type *type, LONGEST *low_bound,
- LONGEST *high_bound);
+extern gdb::optional<LONGEST> get_discrete_high_bound (struct type *type);
-extern int discrete_position (struct type *type, LONGEST val, LONGEST *pos);
+/* Assuming TYPE is a simple, non-empty array type, compute its upper
+ and lower bound. Save the low bound into LOW_BOUND if not NULL.
+ Save the high bound into HIGH_BOUND if not NULL.
+
+ Return true if the operation was successful. Return false otherwise,
+ in which case the values of LOW_BOUND and HIGH_BOUNDS are unmodified. */
+
+extern bool get_array_bounds (struct type *type, LONGEST *low_bound,
+ LONGEST *high_bound);
+
+extern gdb::optional<LONGEST> discrete_position (struct type *type,
+ LONGEST val);
extern int class_types_same_p (const struct type *, const struct type *);
extern void maintenance_print_type (const char *, int);
-extern htab_t create_copied_types_hash (struct objfile *objfile);
+extern htab_up create_copied_types_hash (struct objfile *objfile);
extern struct type *copy_type_recursive (struct objfile *objfile,
struct type *type,
extern int type_not_associated (const struct type *type);
+/* Return True if TYPE is a TYPE_CODE_FIXED_POINT or if TYPE is
+ a range type whose base type is a TYPE_CODE_FIXED_POINT. */
+extern bool is_fixed_point_type (struct type *type);
+
+/* Allocate a fixed-point type info for TYPE. This should only be
+ called by INIT_FIXED_POINT_SPECIFIC. */
+extern void allocate_fixed_point_type_info (struct type *type);
+
/* * When the type includes explicit byte ordering, return that.
- Otherwise, the byte ordering from gdbarch_byte_order for
- get_type_arch is returned. */
-
+ Otherwise, the byte ordering from gdbarch_byte_order for
+ the type's arch is returned. */
+
extern enum bfd_endian type_byte_order (const struct type *type);
/* A flag to enable printing of debugging information of C++
projects / deliverable / binutils-gdb.git / blobdiff