/* Abstraction of GNU v3 abi.
Contributed by Jim Blandy <jimb@redhat.com>
- Copyright 2001, 2002 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "value.h"
#include "cp-abi.h"
+#include "cp-support.h"
#include "demangle.h"
#include "gdb_assert.h"
+#include "gdb_string.h"
static struct cp_abi_ops gnu_v3_abi_ops;
struct minimal_symbol *vtable_symbol;
const char *vtable_symbol_name;
const char *class_name;
- struct symbol *class_symbol;
struct type *run_time_type;
struct type *base_type;
LONGEST offset_to_top;
class_name = vtable_symbol_name + 11;
/* Try to look up the class name as a type name. */
- class_symbol = lookup_symbol (class_name, 0, STRUCT_NAMESPACE, 0, 0);
- if (! class_symbol)
- {
- warning ("can't find class named `%s', as given by C++ RTTI", class_name);
- return NULL;
- }
-
- /* Make sure the type symbol is sane. (An earlier version of this
- code would find constructor functions, who have the same name as
- the class.) */
- if (SYMBOL_CLASS (class_symbol) != LOC_TYPEDEF
- || TYPE_CODE (SYMBOL_TYPE (class_symbol)) != TYPE_CODE_CLASS)
- {
- warning ("C++ RTTI gives a class name of `%s', but that isn't a type name",
- class_name);
- return NULL;
- }
-
- /* This is the object's run-time type! */
- run_time_type = SYMBOL_TYPE (class_symbol);
+ /* FIXME: chastain/2003-11-26: block=NULL is bogus. See pr gdb/1465. */
+ run_time_type = cp_lookup_rtti_type (class_name, NULL);
+ if (run_time_type == NULL)
+ return NULL;
/* Get the offset from VALUE to the top of the complete object.
NOTE: this is the reverse of the meaning of *TOP_P. */
type now. */
if (TYPE_VPTR_FIELDNO (vfn_base) < 0)
fill_in_vptr_fieldno (vfn_base);
+ if (TYPE_VPTR_FIELDNO (vfn_base) < 0)
+ error ("Could not find virtual table pointer for class \"%s\".",
+ TYPE_TAG_NAME (vfn_base) ? TYPE_TAG_NAME (vfn_base) : "<unknown>");
/* Now that we know which base class is defining our virtual
function, cast our value to that baseclass. This takes care of
to (the address of)(ARG) + OFFSET.
-1 is returned on error. */
-int
+static int
gnuv3_baseclass_offset (struct type *type, int index, char *valaddr,
CORE_ADDR address)
{
v3 C++ ABI Section 2.4.I.2.b. Fortunately the ABI guarantees that the
vtable pointer will be located at the beginning of the object, so we can
bypass the casting. Verify that the TYPE_VPTR_FIELDNO is in fact at the
- start of whichever baseclass it resides in, as a sanity measure. */
+ start of whichever baseclass it resides in, as a sanity measure - iff
+ we have debugging information for that baseclass. */
vbasetype = TYPE_VPTR_BASETYPE (type);
- if (TYPE_FIELD_BITPOS (vbasetype, TYPE_VPTR_FIELDNO (vbasetype)) != 0)
+ if (TYPE_VPTR_FIELDNO (vbasetype) < 0)
+ fill_in_vptr_fieldno (vbasetype);
+
+ if (TYPE_VPTR_FIELDNO (vbasetype) >= 0
+ && TYPE_FIELD_BITPOS (vbasetype, TYPE_VPTR_FIELDNO (vbasetype)) != 0)
error ("Illegal vptr offset in class %s",
TYPE_NAME (vbasetype) ? TYPE_NAME (vbasetype) : "<unknown>");
static void
init_gnuv3_ops (void)
{
- vtable_type_gdbarch_data = register_gdbarch_data (build_gdb_vtable_type, 0);
+ vtable_type_gdbarch_data = register_gdbarch_data (build_gdb_vtable_type);
gnu_v3_abi_ops.shortname = "gnu-v3";
gnu_v3_abi_ops.longname = "GNU G++ Version 3 ABI";
gnu_v3_abi_ops.baseclass_offset = gnuv3_baseclass_offset;
}
+extern initialize_file_ftype _initialize_gnu_v3_abi; /* -Wmissing-prototypes */
void
_initialize_gnu_v3_abi (void)
{
init_gnuv3_ops ();
- register_cp_abi (gnu_v3_abi_ops);
+ register_cp_abi (&gnu_v3_abi_ops);
}