/* Abstraction of GNU v2 abi.
- Copyright (C) 2001, 2002, 2003, 2005, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2001-2020 Free Software Foundation, Inc.
Contributed by Daniel Berlin <dberlin@redhat.com>
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdb_string.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "value.h"
#include "demangle.h"
+#include "gdb-demangle.h"
#include "cp-abi.h"
#include "cp-support.h"
-#include "gnu-v2-abi.h"
-
#include <ctype.h>
struct cp_abi_ops gnu_v2_abi_ops;
gnuv2_is_destructor_name (const char *name)
{
if ((name[0] == '_' && is_cplus_marker (name[1]) && name[2] == '_')
- || strncmp (name, "__dt__", 6) == 0)
+ || startswith (name, "__dt__"))
return complete_object_dtor;
else
- return 0;
+ return (enum dtor_kinds) 0;
}
static enum ctor_kinds
{
if ((name[0] == '_' && name[1] == '_'
&& (isdigit (name[2]) || strchr ("Qt", name[2])))
- || strncmp (name, "__ct__", 6) == 0)
+ || startswith (name, "__ct__"))
return complete_object_ctor;
else
- return 0;
+ return (enum ctor_kinds) 0;
}
static int
static int
gnuv2_is_operator_name (const char *name)
{
- return strncmp (name, "operator", 8) == 0;
+ return startswith (name, CP_OPERATOR_STR);
}
\f
struct value *entry;
struct value *vfn;
struct value *vtbl;
- struct value *vi = value_from_longest (builtin_type_int,
- (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j));
+ LONGEST vi = (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j);
struct type *fcontext = TYPE_FN_FIELD_FCONTEXT (f, j);
struct type *context;
struct type *context_vptr_basetype;
if (TYPE_TARGET_TYPE (context) != type1)
{
struct value *tmp = value_cast (context, value_addr (arg1));
+
arg1 = value_ind (tmp);
type1 = check_typedef (value_type (arg1));
}
context_vptr_basetype);
/* With older versions of g++, the vtbl field pointed to an array
- of structures. Nowadays it points directly to the structure. */
- if (TYPE_CODE (value_type (vtbl)) == TYPE_CODE_PTR
- && TYPE_CODE (TYPE_TARGET_TYPE (value_type (vtbl))) == TYPE_CODE_ARRAY)
+ of structures. Nowadays it points directly to the structure. */
+ if (value_type (vtbl)->code () == TYPE_CODE_PTR
+ && TYPE_TARGET_TYPE (value_type (vtbl))->code () == TYPE_CODE_ARRAY)
{
/* Handle the case where the vtbl field points to an
- array of structures. */
+ array of structures. */
vtbl = value_ind (vtbl);
/* Index into the virtual function table. This is hard-coded because
}
else
{
- /* Handle the case where the vtbl field points directly to a structure. */
- vtbl = value_add (vtbl, vi);
+ /* Handle the case where the vtbl field points directly to a
+ structure. */
+ vtbl = value_ptradd (vtbl, vi);
entry = value_ind (vtbl);
}
entry_type = check_typedef (value_type (entry));
- if (TYPE_CODE (entry_type) == TYPE_CODE_STRUCT)
+ if (entry_type->code () == TYPE_CODE_STRUCT)
{
- /* Move the `this' pointer according to the virtual function table. */
- set_value_offset (arg1, value_offset (arg1) + value_as_long (value_field (entry, 0)));
+ /* Move the `this' pointer according to the virtual function table. */
+ set_value_offset (arg1, value_offset (arg1)
+ + value_as_long (value_field (entry, 0)));
if (!value_lazy (arg1))
{
vfn = value_field (entry, 2);
}
- else if (TYPE_CODE (entry_type) == TYPE_CODE_PTR)
+ else if (entry_type->code () == TYPE_CODE_PTR)
vfn = entry;
else
error (_("I'm confused: virtual function table has bad type"));
/* Reinstantiate the function pointer with the correct type. */
- deprecated_set_value_type (vfn, lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j)));
+ deprecated_set_value_type (vfn,
+ lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j)));
*arg1p = arg1;
return vfn;
static struct type *
-gnuv2_value_rtti_type (struct value *v, int *full, int *top, int *using_enc)
+gnuv2_value_rtti_type (struct value *v, int *full, LONGEST *top, int *using_enc)
{
struct type *known_type;
struct type *rtti_type;
- CORE_ADDR coreptr;
- struct value *vp;
- long top_offset = 0;
- char rtti_type_name[256];
CORE_ADDR vtbl;
- struct minimal_symbol *minsym;
- struct symbol *sym;
+ struct bound_minimal_symbol minsym;
char *demangled_name, *p;
+ const char *linkage_name;
struct type *btype;
struct type *known_type_vptr_basetype;
int known_type_vptr_fieldno;
if (using_enc)
*using_enc = 0;
- /* Get declared type */
+ /* Get declared type. */
known_type = value_type (v);
- CHECK_TYPEDEF (known_type);
- /* RTTI works only or class objects */
- if (TYPE_CODE (known_type) != TYPE_CODE_CLASS)
+ known_type = check_typedef (known_type);
+ /* RTTI works only or class objects. */
+ if (known_type->code () != TYPE_CODE_STRUCT)
return NULL;
/* Plan on this changing in the future as i get around to setting
return NULL;
/* Make sure our basetype and known type match, otherwise, cast
- so we can get at the vtable properly.
- */
+ so we can get at the vtable properly. */
btype = known_type_vptr_basetype;
- CHECK_TYPEDEF (btype);
+ btype = check_typedef (btype);
if (btype != known_type )
{
v = value_cast (btype, v);
if (using_enc)
*using_enc=1;
}
- /*
- We can't use value_ind here, because it would want to use RTTI, and
- we'd waste a bunch of time figuring out we already know the type.
- Besides, we don't care about the type, just the actual pointer
- */
- if (VALUE_ADDRESS (value_field (v, known_type_vptr_fieldno)) == 0)
+ /* We can't use value_ind here, because it would want to use RTTI, and
+ we'd waste a bunch of time figuring out we already know the type.
+ Besides, we don't care about the type, just the actual pointer. */
+ if (value_address (value_field (v, known_type_vptr_fieldno)) == 0)
return NULL;
vtbl = value_as_address (value_field (v, known_type_vptr_fieldno));
- /* Try to find a symbol that is the vtable */
+ /* Try to find a symbol that is the vtable. */
minsym=lookup_minimal_symbol_by_pc(vtbl);
- if (minsym==NULL
- || (demangled_name=DEPRECATED_SYMBOL_NAME (minsym))==NULL
- || !is_vtable_name (demangled_name))
+ if (minsym.minsym==NULL
+ || (linkage_name=minsym.minsym->linkage_name ())==NULL
+ || !is_vtable_name (linkage_name))
return NULL;
- /* If we just skip the prefix, we get screwed by namespaces */
- demangled_name=cplus_demangle(demangled_name,DMGL_PARAMS|DMGL_ANSI);
+ /* If we just skip the prefix, we get screwed by namespaces. */
+ demangled_name=gdb_demangle(linkage_name,DMGL_PARAMS|DMGL_ANSI);
p = strchr (demangled_name, ' ');
if (p)
*p = '\0';
- /* Lookup the type for the name */
- /* FIXME: chastain/2003-11-26: block=NULL is bogus. See pr gdb/1465. */
+ /* Lookup the type for the name. */
+ /* FIXME: chastain/2003-11-26: block=NULL is bogus. See pr gdb/1465. */
rtti_type = cp_lookup_rtti_type (demangled_name, NULL);
if (rtti_type == NULL)
return NULL;
if (TYPE_N_BASECLASSES(rtti_type) > 1 && full && (*full) != 1)
{
if (top)
- *top=TYPE_BASECLASS_BITPOS(rtti_type,TYPE_VPTR_FIELDNO(rtti_type))/8;
+ *top = TYPE_BASECLASS_BITPOS (rtti_type,
+ TYPE_VPTR_FIELDNO(rtti_type)) / 8;
if (top && ((*top) >0))
{
if (TYPE_LENGTH(rtti_type) > TYPE_LENGTH(known_type))
vb_match (struct type *type, int index, struct type *basetype)
{
struct type *fieldtype;
- char *name = TYPE_FIELD_NAME (type, index);
- char *field_class_name = NULL;
+ const char *name = TYPE_FIELD_NAME (type, index);
+ const char *field_class_name = NULL;
if (*name != '_')
return 0;
it is for this baseclass. */
fieldtype = TYPE_FIELD_TYPE (type, index);
if (fieldtype == NULL
- || TYPE_CODE (fieldtype) != TYPE_CODE_PTR)
+ || fieldtype->code () != TYPE_CODE_PTR)
/* "Can't happen". */
return 0;
if (TYPE_TARGET_TYPE (fieldtype) == basetype)
return 1;
- if (TYPE_NAME (basetype) != NULL
- && TYPE_NAME (TYPE_TARGET_TYPE (fieldtype)) != NULL
- && strcmp (TYPE_NAME (basetype),
- TYPE_NAME (TYPE_TARGET_TYPE (fieldtype))) == 0)
+ if (basetype->name () != NULL
+ && TYPE_TARGET_TYPE (fieldtype)->name () != NULL
+ && strcmp (basetype->name (),
+ TYPE_TARGET_TYPE (fieldtype)->name ()) == 0)
return 1;
return 0;
}
-/* Compute the offset of the baseclass which is
- the INDEXth baseclass of class TYPE,
- for value at VALADDR (in host) at ADDRESS (in target).
- The result is the offset of the baseclass value relative
- to (the address of)(ARG) + OFFSET.
-
- -1 is returned on error. */
+/* Compute the offset of the baseclass which is the INDEXth baseclass
+ of class TYPE, for value at VALADDR (in host) at ADDRESS (in
+ target). The result is the offset of the baseclass value relative
+ to (the address of)(ARG) + OFFSET. */
-int
+static int
gnuv2_baseclass_offset (struct type *type, int index,
- const bfd_byte *valaddr, CORE_ADDR address)
+ const bfd_byte *valaddr, LONGEST embedded_offset,
+ CORE_ADDR address, const struct value *val)
{
struct type *basetype = TYPE_BASECLASS (type, index);
if (BASETYPE_VIA_VIRTUAL (type, index))
{
/* Must hunt for the pointer to this virtual baseclass. */
- int i, len = TYPE_NFIELDS (type);
+ int i, len = type->num_fields ();
int n_baseclasses = TYPE_N_BASECLASSES (type);
/* First look for the virtual baseclass pointer
{
if (vb_match (type, i, basetype))
{
- CORE_ADDR addr
- = unpack_pointer (TYPE_FIELD_TYPE (type, i),
- valaddr + (TYPE_FIELD_BITPOS (type, i) / 8));
+ struct type *field_type;
+ LONGEST field_offset;
+ int field_length;
+ CORE_ADDR addr;
- return addr - (LONGEST) address;
+ field_type = check_typedef (TYPE_FIELD_TYPE (type, i));
+ field_offset = TYPE_FIELD_BITPOS (type, i) / 8;
+ field_length = TYPE_LENGTH (field_type);
+
+ if (!value_bytes_available (val, embedded_offset + field_offset,
+ field_length))
+ throw_error (NOT_AVAILABLE_ERROR,
+ _("Virtual baseclass pointer is not available"));
+
+ addr = unpack_pointer (field_type,
+ valaddr + embedded_offset + field_offset);
+
+ return addr - (LONGEST) address + embedded_offset;
}
}
/* Not in the fields, so try looking through the baseclasses. */
for (i = index + 1; i < n_baseclasses; i++)
{
+ /* Don't go through baseclass_offset, as that wraps
+ exceptions, thus, inner exceptions would be wrapped more
+ than once. */
int boffset =
- baseclass_offset (type, i, valaddr, address);
+ gnuv2_baseclass_offset (type, i, valaddr,
+ embedded_offset, address, val);
+
if (boffset)
return boffset;
}
- /* Not found. */
- return -1;
+
+ error (_("Baseclass offset not found"));
}
/* Baseclass is easily computed. */
gnu_v2_abi_ops.baseclass_offset = gnuv2_baseclass_offset;
}
-extern initialize_file_ftype _initialize_gnu_v2_abi; /* -Wmissing-prototypes */
-
+void _initialize_gnu_v2_abi ();
void
-_initialize_gnu_v2_abi (void)
+_initialize_gnu_v2_abi ()
{
init_gnuv2_ops ();
register_cp_abi (&gnu_v2_abi_ops);
- set_cp_abi_as_auto_default (gnu_v2_abi_ops.shortname);
}
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