/* Support routines for manipulating internal types for GDB.
- Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 1992-2014 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdb_string.h"
+#include <string.h>
#include "bfd.h"
#include "symtab.h"
#include "symfile.h"
#include "demangle.h"
#include "complaints.h"
#include "gdbcmd.h"
-#include "wrapper.h"
#include "cp-abi.h"
#include "gdb_assert.h"
#include "hashtab.h"
-
+#include "exceptions.h"
+#include "cp-support.h"
+#include "bcache.h"
+#include "dwarf2loc.h"
/* Initialize BADNESS constants. */
const struct rank FLOAT_CONVERSION_BADNESS = {2,0};
const struct rank INT_FLOAT_CONVERSION_BADNESS = {2,0};
const struct rank VOID_PTR_CONVERSION_BADNESS = {2,0};
-const struct rank BOOL_PTR_CONVERSION_BADNESS = {3,0};
+const struct rank BOOL_CONVERSION_BADNESS = {3,0};
const struct rank BASE_CONVERSION_BADNESS = {2,0};
const struct rank REFERENCE_CONVERSION_BADNESS = {2,0};
-
+const struct rank NULL_POINTER_CONVERSION_BADNESS = {2,0};
const struct rank NS_POINTER_CONVERSION_BADNESS = {10,0};
+const struct rank NS_INTEGER_POINTER_CONVERSION_BADNESS = {3,0};
/* Floatformat pairs. */
const struct floatformat *floatformats_ieee_half[BFD_ENDIAN_UNKNOWN] = {
&floatformat_vax_d
};
const struct floatformat *floatformats_ibm_long_double[BFD_ENDIAN_UNKNOWN] = {
- &floatformat_ibm_long_double,
- &floatformat_ibm_long_double
+ &floatformat_ibm_long_double_big,
+ &floatformat_ibm_long_double_little
};
+/* Should opaque types be resolved? */
+
+static int opaque_type_resolution = 1;
+
+/* A flag to enable printing of debugging information of C++
+ overloading. */
+
+unsigned int overload_debug = 0;
+
+/* A flag to enable strict type checking. */
+
+static int strict_type_checking = 1;
+
+/* A function to show whether opaque types are resolved. */
-int opaque_type_resolution = 1;
static void
show_opaque_type_resolution (struct ui_file *file, int from_tty,
struct cmd_list_element *c,
value);
}
-int overload_debug = 0;
+/* A function to show whether C++ overload debugging is enabled. */
+
static void
show_overload_debug (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
value);
}
-struct extra
- {
- char str[128];
- int len;
- }; /* Maximum extension is 128! FIXME */
-
-static void print_bit_vector (B_TYPE *, int);
-static void print_arg_types (struct field *, int, int);
-static void dump_fn_fieldlists (struct type *, int);
-static void print_cplus_stuff (struct type *, int);
+/* A function to show the status of strict type checking. */
+static void
+show_strict_type_checking (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Strict type checking is %s.\n"), value);
+}
+\f
/* Allocate a new OBJFILE-associated type structure and fill it
with some defaults. Space for the type structure is allocated
on the objfile's objfile_obstack. */
/* Alloc the structure and start off with all fields zeroed. */
- type = XZALLOC (struct type);
- TYPE_MAIN_TYPE (type) = XZALLOC (struct main_type);
+ type = XCNEW (struct type);
+ TYPE_MAIN_TYPE (type) = XCNEW (struct main_type);
TYPE_OBJFILE_OWNED (type) = 0;
TYPE_OWNER (type).gdbarch = gdbarch;
return TYPE_OWNER (type).gdbarch;
}
+/* See gdbtypes.h. */
+
+struct type *
+get_target_type (struct type *type)
+{
+ if (type != NULL)
+ {
+ type = TYPE_TARGET_TYPE (type);
+ if (type != NULL)
+ type = check_typedef (type);
+ }
+
+ return type;
+}
/* Alloc a new type instance structure, fill it with some defaults,
and point it at OLDTYPE. Allocate the new type instance from the
/* Allocate the structure. */
if (! TYPE_OBJFILE_OWNED (oldtype))
- type = XZALLOC (struct type);
+ type = XCNEW (struct type);
else
type = OBSTACK_ZALLOC (&TYPE_OBJFILE (oldtype)->objfile_obstack,
struct type);
/* Clear all remnants of the previous type at TYPE, in preparation for
replacing it with something else. Preserve owner information. */
+
static void
smash_type (struct type *type)
{
TYPE_TARGET_TYPE (ntype) = type;
TYPE_POINTER_TYPE (type) = ntype;
- /* FIXME! Assume the machine has only one representation for
- pointers! */
+ /* FIXME! Assumes the machine has only one representation for pointers! */
TYPE_LENGTH (ntype)
= gdbarch_ptr_bit (get_type_arch (type)) / TARGET_CHAR_BIT;
gdbarch_address_to_pointer. */
TYPE_UNSIGNED (ntype) = 1;
- if (!TYPE_POINTER_TYPE (type)) /* Remember it, if don't have one. */
- TYPE_POINTER_TYPE (type) = ntype;
-
/* Update the length of all the other variants of this type. */
chain = TYPE_CHAIN (ntype);
while (chain != ntype)
return ntype;
}
-
/* Given a type TYPE, return a type of functions that return that type.
May need to construct such a type if this is the first use. */
return make_function_type (type, (struct type **) 0);
}
+/* Given a type TYPE and argument types, return the appropriate
+ function type. If the final type in PARAM_TYPES is NULL, make a
+ varargs function. */
+
+struct type *
+lookup_function_type_with_arguments (struct type *type,
+ int nparams,
+ struct type **param_types)
+{
+ struct type *fn = make_function_type (type, (struct type **) 0);
+ int i;
+
+ if (nparams > 0)
+ {
+ if (param_types[nparams - 1] == NULL)
+ {
+ --nparams;
+ TYPE_VARARGS (fn) = 1;
+ }
+ else if (TYPE_CODE (check_typedef (param_types[nparams - 1]))
+ == TYPE_CODE_VOID)
+ {
+ --nparams;
+ /* Caller should have ensured this. */
+ gdb_assert (nparams == 0);
+ TYPE_PROTOTYPED (fn) = 1;
+ }
+ }
+
+ TYPE_NFIELDS (fn) = nparams;
+ TYPE_FIELDS (fn) = TYPE_ZALLOC (fn, nparams * sizeof (struct field));
+ for (i = 0; i < nparams; ++i)
+ TYPE_FIELD_TYPE (fn, i) = param_types[i];
+
+ return fn;
+}
+
/* Identify address space identifier by name --
return the integer flag defined in gdbtypes.h. */
-extern int
+
+int
address_space_name_to_int (struct gdbarch *gdbarch, char *space_identifier)
{
int type_flags;
in the same objfile. Otherwise, allocate fresh memory for the new
type whereever TYPE lives. If TYPEPTR is non-zero, set it to the
new type we construct. */
+
struct type *
make_cv_type (int cnst, int voltl,
struct type *type,
return ntype;
}
+/* Make a 'restrict'-qualified version of TYPE. */
+
+struct type *
+make_restrict_type (struct type *type)
+{
+ return make_qualified_type (type,
+ (TYPE_INSTANCE_FLAGS (type)
+ | TYPE_INSTANCE_FLAG_RESTRICT),
+ NULL);
+}
+
/* Replace the contents of ntype with the type *type. This changes the
contents, rather than the pointer for TYPE_MAIN_TYPE (ntype); thus
the changes are propogated to all types in the TYPE_CHAIN.
smashing is ugly, and needs to be replaced with something more
controlled. TYPE_MAIN_TYPE is a step in this direction; it's not
clear if more steps are needed. */
+
void
replace_type (struct type *ntype, struct type *type)
{
entries. */
int i;
- *lowp = *highp = TYPE_FIELD_BITPOS (type, 0);
+ *lowp = *highp = TYPE_FIELD_ENUMVAL (type, 0);
for (i = 0; i < TYPE_NFIELDS (type); i++)
{
- if (TYPE_FIELD_BITPOS (type, i) < *lowp)
- *lowp = TYPE_FIELD_BITPOS (type, i);
- if (TYPE_FIELD_BITPOS (type, i) > *highp)
- *highp = TYPE_FIELD_BITPOS (type, i);
+ if (TYPE_FIELD_ENUMVAL (type, i) < *lowp)
+ *lowp = TYPE_FIELD_ENUMVAL (type, i);
+ if (TYPE_FIELD_ENUMVAL (type, i) > *highp)
+ *highp = TYPE_FIELD_ENUMVAL (type, i);
}
/* Set unsigned indicator if warranted. */
Elements will be of type ELEMENT_TYPE, the indices will be of type
RANGE_TYPE.
+ If BIT_STRIDE is not zero, build a packed array type whose element
+ size is BIT_STRIDE. Otherwise, ignore this parameter.
+
FIXME: Maybe we should check the TYPE_CODE of RESULT_TYPE to make
sure it is TYPE_CODE_UNDEF before we bash it into an array
type? */
struct type *
-create_array_type (struct type *result_type,
- struct type *element_type,
- struct type *range_type)
+create_array_type_with_stride (struct type *result_type,
+ struct type *element_type,
+ struct type *range_type,
+ unsigned int bit_stride)
{
LONGEST low_bound, high_bound;
In such cases, the array length should be zero. */
if (high_bound < low_bound)
TYPE_LENGTH (result_type) = 0;
+ else if (bit_stride > 0)
+ TYPE_LENGTH (result_type) =
+ (bit_stride * (high_bound - low_bound + 1) + 7) / 8;
else
TYPE_LENGTH (result_type) =
TYPE_LENGTH (element_type) * (high_bound - low_bound + 1);
(struct field *) TYPE_ZALLOC (result_type, sizeof (struct field));
TYPE_INDEX_TYPE (result_type) = range_type;
TYPE_VPTR_FIELDNO (result_type) = -1;
+ if (bit_stride > 0)
+ TYPE_FIELD_BITSIZE (result_type, 0) = bit_stride;
/* TYPE_FLAG_TARGET_STUB will take care of zero length arrays. */
if (TYPE_LENGTH (result_type) == 0)
return result_type;
}
+/* Same as create_array_type_with_stride but with no bit_stride
+ (BIT_STRIDE = 0), thus building an unpacked array. */
+
+struct type *
+create_array_type (struct type *result_type,
+ struct type *element_type,
+ struct type *range_type)
+{
+ return create_array_type_with_stride (result_type, element_type,
+ range_type, 0);
+}
+
struct type *
lookup_array_range_type (struct type *element_type,
- int low_bound, int high_bound)
+ LONGEST low_bound, LONGEST high_bound)
{
struct gdbarch *gdbarch = get_type_arch (element_type);
struct type *index_type = builtin_type (gdbarch)->builtin_int;
struct type *
lookup_string_range_type (struct type *string_char_type,
- int low_bound, int high_bound)
+ LONGEST low_bound, LONGEST high_bound)
{
struct type *result_type;
/* Return a typename for a struct/union/enum type without "struct ",
"union ", or "enum ". If the type has a NULL name, return NULL. */
-char *
+const char *
type_name_no_tag (const struct type *type)
{
if (TYPE_TAG_NAME (type) != NULL)
name = type_name_no_tag (saved_type);
objfile = TYPE_OBJFILE (saved_type);
error (_("Invalid anonymous type %s [in module %s], GCC PR debug/47510 bug?"),
- name ? name : "<anonymous>", objfile ? objfile->name : "<arch>");
+ name ? name : "<anonymous>",
+ objfile ? objfile_name (objfile) : "<arch>");
}
/* Lookup a typedef or primitive type named NAME, visible in lexical
const struct block *block, int noerr)
{
struct symbol *sym;
- struct type *tmp;
+ struct type *type;
sym = lookup_symbol (name, block, VAR_DOMAIN, 0);
- if (sym == NULL || SYMBOL_CLASS (sym) != LOC_TYPEDEF)
- {
- tmp = language_lookup_primitive_type_by_name (language, gdbarch, name);
- if (tmp)
- {
- return tmp;
- }
- else if (!tmp && noerr)
- {
- return NULL;
- }
- else
- {
- error (_("No type named %s."), name);
- }
- }
- return (SYMBOL_TYPE (sym));
+ if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
+ return SYMBOL_TYPE (sym);
+
+ type = language_lookup_primitive_type_by_name (language, gdbarch, name);
+ if (type)
+ return type;
+
+ if (noerr)
+ return NULL;
+ error (_("No type named %s."), name);
}
struct type *
lookup_unsigned_typename (const struct language_defn *language,
- struct gdbarch *gdbarch, char *name)
+ struct gdbarch *gdbarch, const char *name)
{
char *uns = alloca (strlen (name) + 10);
struct type *
lookup_signed_typename (const struct language_defn *language,
- struct gdbarch *gdbarch, char *name)
+ struct gdbarch *gdbarch, const char *name)
{
struct type *t;
char *uns = alloca (strlen (name) + 8);
visible in lexical block BLOCK. */
struct type *
-lookup_struct (const char *name, struct block *block)
+lookup_struct (const char *name, const struct block *block)
{
struct symbol *sym;
visible in lexical block BLOCK. */
struct type *
-lookup_union (const char *name, struct block *block)
+lookup_union (const char *name, const struct block *block)
{
struct symbol *sym;
struct type *t;
name);
}
-
/* Lookup an enum type named "enum NAME",
visible in lexical block BLOCK. */
struct type *
-lookup_enum (const char *name, struct block *block)
+lookup_enum (const char *name, const struct block *block)
{
struct symbol *sym;
struct type *
lookup_template_type (char *name, struct type *type,
- struct block *block)
+ const struct block *block)
{
struct symbol *sym;
char *nam = (char *)
If NAME is the name of a baseclass type, return that type. */
struct type *
-lookup_struct_elt_type (struct type *type, char *name, int noerr)
+lookup_struct_elt_type (struct type *type, const char *name, int noerr)
{
int i;
char *typename;
for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
{
- char *t_field_name = TYPE_FIELD_NAME (type, i);
+ const char *t_field_name = TYPE_FIELD_NAME (type, i);
if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
{
error (_("Type %s has no component named %s."), typename, name);
}
+/* Store in *MAX the largest number representable by unsigned integer type
+ TYPE. */
+
+void
+get_unsigned_type_max (struct type *type, ULONGEST *max)
+{
+ unsigned int n;
+
+ CHECK_TYPEDEF (type);
+ gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && TYPE_UNSIGNED (type));
+ gdb_assert (TYPE_LENGTH (type) <= sizeof (ULONGEST));
+
+ /* Written this way to avoid overflow. */
+ n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
+ *max = ((((ULONGEST) 1 << (n - 1)) - 1) << 1) | 1;
+}
+
+/* Store in *MIN, *MAX the smallest and largest numbers representable by
+ signed integer type TYPE. */
+
+void
+get_signed_type_minmax (struct type *type, LONGEST *min, LONGEST *max)
+{
+ unsigned int n;
+
+ CHECK_TYPEDEF (type);
+ gdb_assert (TYPE_CODE (type) == TYPE_CODE_INT && !TYPE_UNSIGNED (type));
+ gdb_assert (TYPE_LENGTH (type) <= sizeof (LONGEST));
+
+ n = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
+ *min = -((ULONGEST) 1 << (n - 1));
+ *max = ((ULONGEST) 1 << (n - 1)) - 1;
+}
+
/* Lookup the vptr basetype/fieldno values for TYPE.
If found store vptr_basetype in *BASETYPEP if non-NULL, and return
vptr_fieldno. Also, if found and basetype is from the same objfile,
not been computed and we're either in the middle of reading symbols, or
there was no name for the typedef in the debug info.
+ NOTE: Lookup of opaque types can throw errors for invalid symbol files.
+ QUITs in the symbol reading code can also throw.
+ Thus this function can throw an exception.
+
If TYPE is a TYPE_CODE_TYPEDEF, its length is updated to the length of
the target type.
{
if (!TYPE_TARGET_TYPE (type))
{
- char *name;
+ const char *name;
struct symbol *sym;
/* It is dangerous to call lookup_symbol if we are currently
&& opaque_type_resolution
&& !currently_reading_symtab)
{
- char *name = type_name_no_tag (type);
+ const char *name = type_name_no_tag (type);
struct type *newtype;
if (name == NULL)
types. */
else if (TYPE_STUB (type) && !currently_reading_symtab)
{
- char *name = type_name_no_tag (type);
+ const char *name = type_name_no_tag (type);
/* FIXME: shouldn't we separately check the TYPE_NAME and the
TYPE_TAG_NAME, and look in STRUCT_DOMAIN and/or VAR_DOMAIN
as appropriate? (this code was written before TYPE_NAME and
safe_parse_type (struct gdbarch *gdbarch, char *p, int length)
{
struct ui_file *saved_gdb_stderr;
- struct type *type;
+ struct type *type = NULL; /* Initialize to keep gcc happy. */
+ volatile struct gdb_exception except;
/* Suppress error messages. */
saved_gdb_stderr = gdb_stderr;
gdb_stderr = ui_file_new ();
/* Call parse_and_eval_type() without fear of longjmp()s. */
- if (!gdb_parse_and_eval_type (p, length, &type))
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ type = parse_and_eval_type (p, length);
+ }
+
+ if (except.reason < 0)
type = builtin_type (gdbarch)->builtin_void;
/* Stop suppressing error messages. */
struct gdbarch *gdbarch = get_type_arch (type);
struct fn_field *f;
char *mangled_name = gdb_mangle_name (type, method_id, signature_id);
- char *demangled_name = cplus_demangle (mangled_name,
- DMGL_PARAMS | DMGL_ANSI);
+ char *demangled_name = gdb_demangle (mangled_name,
+ DMGL_PARAMS | DMGL_ANSI);
char *argtypetext, *p;
int depth = 0, argcount = 1;
struct field *argtypes;
/* Set the TYPE's type-specific kind to TYPE_SPECIFIC_GNAT_STUFF,
and allocate the associated gnat-specific data. The gnat-specific
data is also initialized to gnat_aux_default. */
+
void
allocate_gnat_aux_type (struct type *type)
{
*(TYPE_GNAT_SPECIFIC (type)) = gnat_aux_default;
}
-
/* Helper function to initialize the standard scalar types.
- If NAME is non-NULL, then we make a copy of the string pointed
- to by name in the objfile_obstack for that objfile, and initialize
- the type name to that copy. There are places (mipsread.c in particular),
- where init_type is called with a NULL value for NAME). */
+ If NAME is non-NULL, then it is used to initialize the type name.
+ Note that NAME is not copied; it is required to have a lifetime at
+ least as long as OBJFILE. */
struct type *
init_type (enum type_code code, int length, int flags,
- char *name, struct objfile *objfile)
+ const char *name, struct objfile *objfile)
{
struct type *type;
if (flags & TYPE_FLAG_GNU_IFUNC)
TYPE_GNU_IFUNC (type) = 1;
- if (name)
- TYPE_NAME (type) = obsavestring (name, strlen (name),
- &objfile->objfile_obstack);
+ TYPE_NAME (type) = name;
/* C++ fancies. */
}
return type;
}
+\f
+/* Queries on types. */
int
can_dereference (struct type *t)
case TYPE_CODE_UNION:
case TYPE_CODE_SET:
case TYPE_CODE_STRING:
- case TYPE_CODE_BITSTRING:
return 0;
default:
return 1;
}
\f
+/* Overload resolution. */
/* Return the sum of the rank of A with the rank of B. */
struct badness_vector *
rank_function (struct type **parms, int nparms,
- struct type **args, int nargs)
+ struct value **args, int nargs)
{
int i;
struct badness_vector *bv;
/* Now rank all the parameters of the candidate function. */
for (i = 1; i <= min_len; i++)
- bv->rank[i] = rank_one_type (parms[i-1], args[i-1]);
+ bv->rank[i] = rank_one_type (parms[i - 1], value_type (args[i - 1]),
+ args[i - 1]);
/* If more arguments than parameters, add dummy entries. */
for (i = min_len + 1; i <= nargs; i++)
/* Compares type A to type B returns 1 if the represent the same type
0 otherwise. */
-static int
+int
types_equal (struct type *a, struct type *b)
{
/* Identical type pointers. */
if (a == b)
return 1;
+ /* Two function types are equal if their argument and return types
+ are equal. */
+ if (TYPE_CODE (a) == TYPE_CODE_FUNC)
+ {
+ int i;
+
+ if (TYPE_NFIELDS (a) != TYPE_NFIELDS (b))
+ return 0;
+
+ if (!types_equal (TYPE_TARGET_TYPE (a), TYPE_TARGET_TYPE (b)))
+ return 0;
+
+ for (i = 0; i < TYPE_NFIELDS (a); ++i)
+ if (!types_equal (TYPE_FIELD_TYPE (a, i), TYPE_FIELD_TYPE (b, i)))
+ return 0;
+
+ return 1;
+ }
+
return 0;
}
+\f
+/* Deep comparison of types. */
+
+/* An entry in the type-equality bcache. */
+
+typedef struct type_equality_entry
+{
+ struct type *type1, *type2;
+} type_equality_entry_d;
+
+DEF_VEC_O (type_equality_entry_d);
+
+/* A helper function to compare two strings. Returns 1 if they are
+ the same, 0 otherwise. Handles NULLs properly. */
+
+static int
+compare_maybe_null_strings (const char *s, const char *t)
+{
+ if (s == NULL && t != NULL)
+ return 0;
+ else if (s != NULL && t == NULL)
+ return 0;
+ else if (s == NULL && t== NULL)
+ return 1;
+ return strcmp (s, t) == 0;
+}
+
+/* A helper function for check_types_worklist that checks two types for
+ "deep" equality. Returns non-zero if the types are considered the
+ same, zero otherwise. */
+
+static int
+check_types_equal (struct type *type1, struct type *type2,
+ VEC (type_equality_entry_d) **worklist)
+{
+ CHECK_TYPEDEF (type1);
+ CHECK_TYPEDEF (type2);
+
+ if (type1 == type2)
+ return 1;
+
+ if (TYPE_CODE (type1) != TYPE_CODE (type2)
+ || TYPE_LENGTH (type1) != TYPE_LENGTH (type2)
+ || TYPE_UNSIGNED (type1) != TYPE_UNSIGNED (type2)
+ || TYPE_NOSIGN (type1) != TYPE_NOSIGN (type2)
+ || TYPE_VARARGS (type1) != TYPE_VARARGS (type2)
+ || TYPE_VECTOR (type1) != TYPE_VECTOR (type2)
+ || TYPE_NOTTEXT (type1) != TYPE_NOTTEXT (type2)
+ || TYPE_INSTANCE_FLAGS (type1) != TYPE_INSTANCE_FLAGS (type2)
+ || TYPE_NFIELDS (type1) != TYPE_NFIELDS (type2))
+ return 0;
+
+ if (!compare_maybe_null_strings (TYPE_TAG_NAME (type1),
+ TYPE_TAG_NAME (type2)))
+ return 0;
+ if (!compare_maybe_null_strings (TYPE_NAME (type1), TYPE_NAME (type2)))
+ return 0;
+
+ if (TYPE_CODE (type1) == TYPE_CODE_RANGE)
+ {
+ if (memcmp (TYPE_RANGE_DATA (type1), TYPE_RANGE_DATA (type2),
+ sizeof (*TYPE_RANGE_DATA (type1))) != 0)
+ return 0;
+ }
+ else
+ {
+ int i;
+
+ for (i = 0; i < TYPE_NFIELDS (type1); ++i)
+ {
+ const struct field *field1 = &TYPE_FIELD (type1, i);
+ const struct field *field2 = &TYPE_FIELD (type2, i);
+ struct type_equality_entry entry;
+
+ if (FIELD_ARTIFICIAL (*field1) != FIELD_ARTIFICIAL (*field2)
+ || FIELD_BITSIZE (*field1) != FIELD_BITSIZE (*field2)
+ || FIELD_LOC_KIND (*field1) != FIELD_LOC_KIND (*field2))
+ return 0;
+ if (!compare_maybe_null_strings (FIELD_NAME (*field1),
+ FIELD_NAME (*field2)))
+ return 0;
+ switch (FIELD_LOC_KIND (*field1))
+ {
+ case FIELD_LOC_KIND_BITPOS:
+ if (FIELD_BITPOS (*field1) != FIELD_BITPOS (*field2))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_ENUMVAL:
+ if (FIELD_ENUMVAL (*field1) != FIELD_ENUMVAL (*field2))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_PHYSADDR:
+ if (FIELD_STATIC_PHYSADDR (*field1)
+ != FIELD_STATIC_PHYSADDR (*field2))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_PHYSNAME:
+ if (!compare_maybe_null_strings (FIELD_STATIC_PHYSNAME (*field1),
+ FIELD_STATIC_PHYSNAME (*field2)))
+ return 0;
+ break;
+ case FIELD_LOC_KIND_DWARF_BLOCK:
+ {
+ struct dwarf2_locexpr_baton *block1, *block2;
+
+ block1 = FIELD_DWARF_BLOCK (*field1);
+ block2 = FIELD_DWARF_BLOCK (*field2);
+ if (block1->per_cu != block2->per_cu
+ || block1->size != block2->size
+ || memcmp (block1->data, block2->data, block1->size) != 0)
+ return 0;
+ }
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, _("Unsupported field kind "
+ "%d by check_types_equal"),
+ FIELD_LOC_KIND (*field1));
+ }
+
+ entry.type1 = FIELD_TYPE (*field1);
+ entry.type2 = FIELD_TYPE (*field2);
+ VEC_safe_push (type_equality_entry_d, *worklist, &entry);
+ }
+ }
+
+ if (TYPE_TARGET_TYPE (type1) != NULL)
+ {
+ struct type_equality_entry entry;
+
+ if (TYPE_TARGET_TYPE (type2) == NULL)
+ return 0;
+
+ entry.type1 = TYPE_TARGET_TYPE (type1);
+ entry.type2 = TYPE_TARGET_TYPE (type2);
+ VEC_safe_push (type_equality_entry_d, *worklist, &entry);
+ }
+ else if (TYPE_TARGET_TYPE (type2) != NULL)
+ return 0;
+
+ return 1;
+}
+
+/* Check types on a worklist for equality. Returns zero if any pair
+ is not equal, non-zero if they are all considered equal. */
+
+static int
+check_types_worklist (VEC (type_equality_entry_d) **worklist,
+ struct bcache *cache)
+{
+ while (!VEC_empty (type_equality_entry_d, *worklist))
+ {
+ struct type_equality_entry entry;
+ int added;
+
+ entry = *VEC_last (type_equality_entry_d, *worklist);
+ VEC_pop (type_equality_entry_d, *worklist);
+
+ /* If the type pair has already been visited, we know it is
+ ok. */
+ bcache_full (&entry, sizeof (entry), cache, &added);
+ if (!added)
+ continue;
+
+ if (check_types_equal (entry.type1, entry.type2, worklist) == 0)
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Return non-zero if types TYPE1 and TYPE2 are equal, as determined by a
+ "deep comparison". Otherwise return zero. */
+
+int
+types_deeply_equal (struct type *type1, struct type *type2)
+{
+ volatile struct gdb_exception except;
+ int result = 0;
+ struct bcache *cache;
+ VEC (type_equality_entry_d) *worklist = NULL;
+ struct type_equality_entry entry;
+
+ gdb_assert (type1 != NULL && type2 != NULL);
+
+ /* Early exit for the simple case. */
+ if (type1 == type2)
+ return 1;
+
+ cache = bcache_xmalloc (NULL, NULL);
+ entry.type1 = type1;
+ entry.type2 = type2;
+ VEC_safe_push (type_equality_entry_d, worklist, &entry);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ result = check_types_worklist (&worklist, cache);
+ }
+ /* check_types_worklist calls several nested helper functions,
+ some of which can raise a GDB Exception, so we just check
+ and rethrow here. If there is a GDB exception, a comparison
+ is not capable (or trusted), so exit. */
+ bcache_xfree (cache);
+ VEC_free (type_equality_entry_d, worklist);
+ /* Rethrow if there was a problem. */
+ if (except.reason < 0)
+ throw_exception (except);
+
+ return result;
+}
+\f
/* Compare one type (PARM) for compatibility with another (ARG).
* PARM is intended to be the parameter type of a function; and
* ARG is the supplied argument's type. This function tests if
* the latter can be converted to the former.
+ * VALUE is the argument's value or NULL if none (or called recursively)
*
* Return 0 if they are identical types;
* Otherwise, return an integer which corresponds to how compatible
* Generally the "bad" conversions are all uniformly assigned a 100. */
struct rank
-rank_one_type (struct type *parm, struct type *arg)
+rank_one_type (struct type *parm, struct type *arg, struct value *value)
{
struct rank rank = {0,0};
/* See through references, since we can almost make non-references
references. */
if (TYPE_CODE (arg) == TYPE_CODE_REF)
- return (sum_ranks (rank_one_type (parm, TYPE_TARGET_TYPE (arg)),
+ return (sum_ranks (rank_one_type (parm, TYPE_TARGET_TYPE (arg), NULL),
REFERENCE_CONVERSION_BADNESS));
if (TYPE_CODE (parm) == TYPE_CODE_REF)
- return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm), arg),
+ return (sum_ranks (rank_one_type (TYPE_TARGET_TYPE (parm), arg, NULL),
REFERENCE_CONVERSION_BADNESS));
if (overload_debug)
/* Debugging only. */
return EXACT_MATCH_BADNESS;
return INCOMPATIBLE_TYPE_BADNESS;
case TYPE_CODE_FUNC:
- return rank_one_type (TYPE_TARGET_TYPE (parm), arg);
+ return rank_one_type (TYPE_TARGET_TYPE (parm), arg, NULL);
case TYPE_CODE_INT:
+ if (value != NULL && TYPE_CODE (value_type (value)) == TYPE_CODE_INT)
+ {
+ if (value_as_long (value) == 0)
+ {
+ /* Null pointer conversion: allow it to be cast to a pointer.
+ [4.10.1 of C++ standard draft n3290] */
+ return NULL_POINTER_CONVERSION_BADNESS;
+ }
+ else
+ {
+ /* If type checking is disabled, allow the conversion. */
+ if (!strict_type_checking)
+ return NS_INTEGER_POINTER_CONVERSION_BADNESS;
+ }
+ }
+ /* fall through */
case TYPE_CODE_ENUM:
case TYPE_CODE_FLAGS:
case TYPE_CODE_CHAR:
case TYPE_CODE_PTR:
case TYPE_CODE_ARRAY:
return rank_one_type (TYPE_TARGET_TYPE (parm),
- TYPE_TARGET_TYPE (arg));
+ TYPE_TARGET_TYPE (arg), NULL);
default:
return INCOMPATIBLE_TYPE_BADNESS;
}
switch (TYPE_CODE (arg))
{
case TYPE_CODE_PTR: /* funcptr -> func */
- return rank_one_type (parm, TYPE_TARGET_TYPE (arg));
+ return rank_one_type (parm, TYPE_TARGET_TYPE (arg), NULL);
default:
return INCOMPATIBLE_TYPE_BADNESS;
}
case TYPE_CODE_BOOL:
switch (TYPE_CODE (arg))
{
+ /* n3290 draft, section 4.12.1 (conv.bool):
+
+ "A prvalue of arithmetic, unscoped enumeration, pointer, or
+ pointer to member type can be converted to a prvalue of type
+ bool. A zero value, null pointer value, or null member pointer
+ value is converted to false; any other value is converted to
+ true. A prvalue of type std::nullptr_t can be converted to a
+ prvalue of type bool; the resulting value is false." */
case TYPE_CODE_INT:
case TYPE_CODE_CHAR:
- case TYPE_CODE_RANGE:
case TYPE_CODE_ENUM:
case TYPE_CODE_FLT:
- return INCOMPATIBLE_TYPE_BADNESS;
+ case TYPE_CODE_MEMBERPTR:
case TYPE_CODE_PTR:
- return BOOL_PTR_CONVERSION_BADNESS;
+ return BOOL_CONVERSION_BADNESS;
+ case TYPE_CODE_RANGE:
+ return INCOMPATIBLE_TYPE_BADNESS;
case TYPE_CODE_BOOL:
return EXACT_MATCH_BADNESS;
default:
/* Not in C++ */
case TYPE_CODE_SET:
return rank_one_type (TYPE_FIELD_TYPE (parm, 0),
- TYPE_FIELD_TYPE (arg, 0));
+ TYPE_FIELD_TYPE (arg, 0), NULL);
default:
return INCOMPATIBLE_TYPE_BADNESS;
}
} /* switch (TYPE_CODE (arg)) */
}
-
/* End of functions for overload resolution. */
+\f
+/* Routines to pretty-print types. */
static void
print_bit_vector (B_TYPE *bits, int nbits)
TYPE_N_BASECLASSES (type));
printfi_filtered (spaces, "nfn_fields %d\n",
TYPE_NFN_FIELDS (type));
- printfi_filtered (spaces, "nfn_fields_total %d\n",
- TYPE_NFN_FIELDS_TOTAL (type));
if (TYPE_N_BASECLASSES (type) > 0)
{
printfi_filtered (spaces, "virtual_field_bits (%d bits at *",
case TYPE_CODE_STRING:
printf_filtered ("(TYPE_CODE_STRING)");
break;
- case TYPE_CODE_BITSTRING:
- printf_filtered ("(TYPE_CODE_BITSTRING)");
- break;
case TYPE_CODE_ERROR:
printf_filtered ("(TYPE_CODE_ERROR)");
break;
{
puts_filtered (" TYPE_FLAG_ADDRESS_CLASS_2");
}
+ if (TYPE_RESTRICT (type))
+ {
+ puts_filtered (" TYPE_FLAG_RESTRICT");
+ }
puts_filtered ("\n");
printfi_filtered (spaces, "flags");
puts_filtered ("\n");
for (idx = 0; idx < TYPE_NFIELDS (type); idx++)
{
- printfi_filtered (spaces + 2,
- "[%d] bitpos %d bitsize %d type ",
- idx, TYPE_FIELD_BITPOS (type, idx),
- TYPE_FIELD_BITSIZE (type, idx));
+ if (TYPE_CODE (type) == TYPE_CODE_ENUM)
+ printfi_filtered (spaces + 2,
+ "[%d] enumval %s type ",
+ idx, plongest (TYPE_FIELD_ENUMVAL (type, idx)));
+ else
+ printfi_filtered (spaces + 2,
+ "[%d] bitpos %d bitsize %d type ",
+ idx, TYPE_FIELD_BITPOS (type, idx),
+ TYPE_FIELD_BITSIZE (type, idx));
gdb_print_host_address (TYPE_FIELD_TYPE (type, idx), gdb_stdout);
printf_filtered (" name '%s' (",
TYPE_FIELD_NAME (type, idx) != NULL
if (spaces == 0)
obstack_free (&dont_print_type_obstack, NULL);
}
-
+\f
/* Trivial helpers for the libiberty hash table, for mapping one
type to another. */
int i, nfields;
nfields = TYPE_NFIELDS (type);
- TYPE_FIELDS (new_type) = XCALLOC (nfields, struct field);
+ TYPE_FIELDS (new_type) = XCNEWVEC (struct field, nfields);
for (i = 0; i < nfields; i++)
{
TYPE_FIELD_ARTIFICIAL (new_type, i) =
SET_FIELD_BITPOS (TYPE_FIELD (new_type, i),
TYPE_FIELD_BITPOS (type, i));
break;
+ case FIELD_LOC_KIND_ENUMVAL:
+ SET_FIELD_ENUMVAL (TYPE_FIELD (new_type, i),
+ TYPE_FIELD_ENUMVAL (type, i));
+ break;
case FIELD_LOC_KIND_PHYSADDR:
SET_FIELD_PHYSADDR (TYPE_FIELD (new_type, i),
TYPE_FIELD_STATIC_PHYSADDR (type, i));
return new_type;
}
-
-
+\f
/* Helper functions to initialize architecture-specific types. */
/* Allocate a type structure associated with GDBARCH and set its
CODE, LENGTH, and NAME fields. */
+
struct type *
arch_type (struct gdbarch *gdbarch,
enum type_code code, int length, char *name)
/* Allocate a TYPE_CODE_INT type structure associated with GDBARCH.
BIT is the type size in bits. If UNSIGNED_P is non-zero, set
the type's TYPE_UNSIGNED flag. NAME is the type name. */
+
struct type *
arch_integer_type (struct gdbarch *gdbarch,
int bit, int unsigned_p, char *name)
/* Allocate a TYPE_CODE_CHAR type structure associated with GDBARCH.
BIT is the type size in bits. If UNSIGNED_P is non-zero, set
the type's TYPE_UNSIGNED flag. NAME is the type name. */
+
struct type *
arch_character_type (struct gdbarch *gdbarch,
int bit, int unsigned_p, char *name)
/* Allocate a TYPE_CODE_BOOL type structure associated with GDBARCH.
BIT is the type size in bits. If UNSIGNED_P is non-zero, set
the type's TYPE_UNSIGNED flag. NAME is the type name. */
+
struct type *
arch_boolean_type (struct gdbarch *gdbarch,
int bit, int unsigned_p, char *name)
BIT is the type size in bits; if BIT equals -1, the size is
determined by the floatformat. NAME is the type name. Set the
TYPE_FLOATFORMAT from FLOATFORMATS. */
+
struct type *
arch_float_type (struct gdbarch *gdbarch,
int bit, char *name, const struct floatformat **floatformats)
/* Allocate a TYPE_CODE_COMPLEX type structure associated with GDBARCH.
NAME is the type name. TARGET_TYPE is the component float type. */
+
struct type *
arch_complex_type (struct gdbarch *gdbarch,
char *name, struct type *target_type)
/* Allocate a TYPE_CODE_FLAGS type structure associated with GDBARCH.
NAME is the type name. LENGTH is the size of the flag word in bytes. */
+
struct type *
arch_flags_type (struct gdbarch *gdbarch, char *name, int length)
{
/* Add field to TYPE_CODE_FLAGS type TYPE to indicate the bit at
position BITPOS is called NAME. */
+
void
append_flags_type_flag (struct type *type, int bitpos, char *name)
{
if (name)
{
TYPE_FIELD_NAME (type, bitpos) = xstrdup (name);
- TYPE_FIELD_BITPOS (type, bitpos) = bitpos;
+ SET_FIELD_BITPOS (TYPE_FIELD (type, bitpos), bitpos);
}
else
{
/* Don't show this field to the user. */
- TYPE_FIELD_BITPOS (type, bitpos) = -1;
+ SET_FIELD_BITPOS (TYPE_FIELD (type, bitpos), -1);
}
}
/* Allocate a TYPE_CODE_STRUCT or TYPE_CODE_UNION type structure (as
specified by CODE) associated with GDBARCH. NAME is the type name. */
+
struct type *
arch_composite_type (struct gdbarch *gdbarch, char *name, enum type_code code)
{
/* Add new field with name NAME and type FIELD to composite type T.
Do not set the field's position or adjust the type's length;
the caller should do so. Return the new field. */
+
struct field *
append_composite_type_field_raw (struct type *t, char *name,
struct type *field)
/* Add new field with name NAME and type FIELD to composite type T.
ALIGNMENT (if non-zero) specifies the minimum field alignment. */
+
void
append_composite_type_field_aligned (struct type *t, char *name,
struct type *field, int alignment)
TYPE_LENGTH (t) = TYPE_LENGTH (t) + TYPE_LENGTH (field);
if (TYPE_NFIELDS (t) > 1)
{
- FIELD_BITPOS (f[0]) = (FIELD_BITPOS (f[-1])
- + (TYPE_LENGTH (FIELD_TYPE (f[-1]))
- * TARGET_CHAR_BIT));
+ SET_FIELD_BITPOS (f[0],
+ (FIELD_BITPOS (f[-1])
+ + (TYPE_LENGTH (FIELD_TYPE (f[-1]))
+ * TARGET_CHAR_BIT)));
if (alignment)
{
if (left)
{
- FIELD_BITPOS (f[0]) += (alignment - left);
+ SET_FIELD_BITPOS (f[0], FIELD_BITPOS (f[0]) + (alignment - left));
TYPE_LENGTH (t) += (alignment - left) / TARGET_CHAR_BIT;
}
}
}
/* Add new field with name NAME and type FIELD to composite type T. */
+
void
append_composite_type_field (struct type *t, char *name,
struct type *field)
append_composite_type_field_aligned (t, name, field, 0);
}
-
static struct gdbarch_data *gdbtypes_data;
const struct builtin_type *
return builtin_type;
}
-
/* This set of objfile-based types is intended to be used by symbol
readers as basic types. */
"<thread local variable, no debug info>", objfile);
/* NOTE: on some targets, addresses and pointers are not necessarily
- the same --- for example, on the D10V, pointers are 16 bits long,
- but addresses are 32 bits long. See doc/gdbint.texinfo,
- ``Pointers Are Not Always Addresses''.
+ the same.
The upshot is:
- gdb's `struct type' always describes the target's
can access any memory on the target, even if the processor has
separate code and data address spaces.
- So, for example:
- - If v is a value holding a D10V code pointer, its contents are
- in target form: a big-endian address left-shifted two bits.
- - If p is a D10V pointer type, TYPE_LENGTH (p) == 2, just as
- sizeof (void *) == 2 on the target.
-
In this context, objfile_type->builtin_core_addr is a bit odd:
it's a target type for a value the target will never see. It's
only used to hold the values of (typeless) linker symbols, which
return objfile_type;
}
+extern initialize_file_ftype _initialize_gdbtypes;
-extern void _initialize_gdbtypes (void);
void
_initialize_gdbtypes (void)
{
gdbtypes_data = gdbarch_data_register_post_init (gdbtypes_post_init);
objfile_type_data = register_objfile_data ();
- add_setshow_zinteger_cmd ("overload", no_class, &overload_debug,
- _("Set debugging of C++ overloading."),
- _("Show debugging of C++ overloading."),
- _("When enabled, ranking of the "
- "functions is displayed."),
- NULL,
- show_overload_debug,
- &setdebuglist, &showdebuglist);
+ add_setshow_zuinteger_cmd ("overload", no_class, &overload_debug,
+ _("Set debugging of C++ overloading."),
+ _("Show debugging of C++ overloading."),
+ _("When enabled, ranking of the "
+ "functions is displayed."),
+ NULL,
+ show_overload_debug,
+ &setdebuglist, &showdebuglist);
/* Add user knob for controlling resolution of opaque types. */
add_setshow_boolean_cmd ("opaque-type-resolution", class_support,
NULL, NULL,
show_opaque_type_resolution,
&setlist, &showlist);
+
+ /* Add an option to permit non-strict type checking. */
+ add_setshow_boolean_cmd ("type", class_support,
+ &strict_type_checking,
+ _("Set strict type checking."),
+ _("Show strict type checking."),
+ NULL, NULL,
+ show_strict_type_checking,
+ &setchecklist, &showchecklist);
}
projects / deliverable / binutils-gdb.git / blobdiff