JSObject::MigrateToMap(object, transition_map);
} else if (object->HasFastProperties() && old_map->CanHaveMoreTransitions()) {
// Create a new descriptor array with fully-frozen properties
- int num_descriptors = old_map->NumberOfOwnDescriptors();
- Handle<DescriptorArray> new_descriptors =
- DescriptorArray::CopyUpToAddAttributes(
- handle(old_map->instance_descriptors()), num_descriptors, FROZEN);
- Handle<Map> new_map = Map::CopyReplaceDescriptors(
- old_map, new_descriptors, INSERT_TRANSITION,
- isolate->factory()->frozen_symbol());
- new_map->freeze();
- new_map->set_is_extensible(false);
- new_map->set_elements_kind(DICTIONARY_ELEMENTS);
+ Handle<Map> new_map = Map::CopyForFreeze(old_map);
JSObject::MigrateToMap(object, new_map);
} else {
// Slow path: need to normalize properties for safety
Handle<Map> Map::CopyReplaceDescriptors(Handle<Map> map,
Handle<DescriptorArray> descriptors,
TransitionFlag flag,
- SimpleTransitionFlag simple_flag) {
- return CopyReplaceDescriptors(
- map, descriptors, flag, Handle<Name>::null(), simple_flag);
-}
-
-
-Handle<Map> Map::CopyReplaceDescriptors(Handle<Map> map,
- Handle<DescriptorArray> descriptors,
- TransitionFlag flag,
- Handle<Name> name,
+ MaybeHandle<Name> maybe_name,
SimpleTransitionFlag simple_flag) {
ASSERT(descriptors->IsSortedNoDuplicates());
result->InitializeDescriptors(*descriptors);
if (flag == INSERT_TRANSITION && map->CanHaveMoreTransitions()) {
+ Handle<Name> name;
+ CHECK(maybe_name.ToHandle(&name));
Handle<TransitionArray> transitions = TransitionArray::CopyInsert(
map, name, result, simple_flag);
map->set_transitions(*transitions);
int number_of_own_descriptors = map->NumberOfOwnDescriptors();
Handle<DescriptorArray> new_descriptors =
DescriptorArray::CopyUpTo(descriptors, number_of_own_descriptors);
- return CopyReplaceDescriptors(map, new_descriptors, OMIT_TRANSITION);
+ return CopyReplaceDescriptors(
+ map, new_descriptors, OMIT_TRANSITION, MaybeHandle<Name>());
}
}
+Handle<Map> Map::CopyForFreeze(Handle<Map> map) {
+ int num_descriptors = map->NumberOfOwnDescriptors();
+ Isolate* isolate = map->GetIsolate();
+ Handle<DescriptorArray> new_desc = DescriptorArray::CopyUpToAddAttributes(
+ handle(map->instance_descriptors(), isolate), num_descriptors, FROZEN);
+ Handle<Map> new_map = Map::CopyReplaceDescriptors(
+ map, new_desc, INSERT_TRANSITION, isolate->factory()->frozen_symbol());
+ new_map->freeze();
+ new_map->set_is_extensible(false);
+ new_map->set_elements_kind(DICTIONARY_ELEMENTS);
+ return new_map;
+}
+
+
Handle<Map> Map::CopyAddDescriptor(Handle<Map> map,
Descriptor* descriptor,
TransitionFlag flag) {
static Handle<Map> CurrentMapForDeprecatedInternal(Handle<Map> map);
static Handle<Map> CopyDropDescriptors(Handle<Map> map);
- static Handle<Map> CopyReplaceDescriptors(
- Handle<Map> map,
- Handle<DescriptorArray> descriptors,
- TransitionFlag flag,
- Handle<Name> name,
- SimpleTransitionFlag simple_flag = FULL_TRANSITION);
- static Handle<Map> CopyReplaceDescriptors(
- Handle<Map> map,
- Handle<DescriptorArray> descriptors,
- TransitionFlag flag,
- SimpleTransitionFlag simple_flag = FULL_TRANSITION);
static Handle<Map> CopyInsertDescriptor(Handle<Map> map,
Descriptor* descriptor,
TransitionFlag flag);
static Handle<Map> CopyForObserved(Handle<Map> map);
+ static Handle<Map> CopyForFreeze(Handle<Map> map);
+
static Handle<Map> CopyNormalized(Handle<Map> map,
PropertyNormalizationMode mode,
NormalizedMapSharingMode sharing);
static Handle<Map> CopyAddDescriptor(Handle<Map> map,
Descriptor* descriptor,
TransitionFlag flag);
+ static Handle<Map> CopyReplaceDescriptors(
+ Handle<Map> map,
+ Handle<DescriptorArray> descriptors,
+ TransitionFlag flag,
+ MaybeHandle<Name> maybe_name,
+ SimpleTransitionFlag simple_flag = FULL_TRANSITION);
// Zaps the contents of backing data structures. Note that the
// heap verifier (i.e. VerifyMarkingVisitor) relies on zapping of objects