| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/api/api-natives.h" |
| |
| #include "src/api/api-inl.h" |
| #include "src/common/message-template.h" |
| #include "src/execution/isolate-inl.h" |
| #include "src/objects/api-callbacks.h" |
| #include "src/objects/hash-table-inl.h" |
| #include "src/objects/lookup.h" |
| #include "src/objects/property-cell.h" |
| #include "src/objects/templates.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| namespace { |
| |
| class InvokeScope { |
| public: |
| explicit InvokeScope(Isolate* isolate) |
| : isolate_(isolate), save_context_(isolate) {} |
| ~InvokeScope() { |
| bool has_exception = isolate_->has_pending_exception(); |
| if (has_exception) { |
| isolate_->ReportPendingMessages(); |
| } else { |
| isolate_->clear_pending_message(); |
| } |
| } |
| |
| private: |
| Isolate* isolate_; |
| SaveContext save_context_; |
| }; |
| |
| MaybeHandle<JSObject> InstantiateObject(Isolate* isolate, |
| Handle<ObjectTemplateInfo> data, |
| Handle<JSReceiver> new_target, |
| bool is_prototype); |
| |
| MaybeHandle<JSFunction> InstantiateFunction( |
| Isolate* isolate, Handle<NativeContext> native_context, |
| Handle<FunctionTemplateInfo> data, |
| MaybeHandle<Name> maybe_name = MaybeHandle<Name>()); |
| |
| MaybeHandle<JSFunction> InstantiateFunction( |
| Isolate* isolate, Handle<FunctionTemplateInfo> data, |
| MaybeHandle<Name> maybe_name = MaybeHandle<Name>()) { |
| return InstantiateFunction(isolate, isolate->native_context(), data, |
| maybe_name); |
| } |
| |
| MaybeHandle<Object> Instantiate( |
| Isolate* isolate, Handle<Object> data, |
| MaybeHandle<Name> maybe_name = MaybeHandle<Name>()) { |
| if (data->IsFunctionTemplateInfo()) { |
| return InstantiateFunction( |
| isolate, Handle<FunctionTemplateInfo>::cast(data), maybe_name); |
| } else if (data->IsObjectTemplateInfo()) { |
| return InstantiateObject(isolate, Handle<ObjectTemplateInfo>::cast(data), |
| Handle<JSReceiver>(), false); |
| } else { |
| return data; |
| } |
| } |
| |
| MaybeHandle<Object> DefineAccessorProperty( |
| Isolate* isolate, Handle<JSObject> object, Handle<Name> name, |
| Handle<Object> getter, Handle<Object> setter, PropertyAttributes attributes, |
| bool force_instantiate) { |
| DCHECK(!getter->IsFunctionTemplateInfo() || |
| !FunctionTemplateInfo::cast(*getter).do_not_cache()); |
| DCHECK(!setter->IsFunctionTemplateInfo() || |
| !FunctionTemplateInfo::cast(*setter).do_not_cache()); |
| if (getter->IsFunctionTemplateInfo()) { |
| if (force_instantiate || |
| FunctionTemplateInfo::cast(*getter).BreakAtEntry()) { |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, getter, |
| InstantiateFunction(isolate, |
| Handle<FunctionTemplateInfo>::cast(getter)), |
| Object); |
| } |
| } |
| if (setter->IsFunctionTemplateInfo()) { |
| if (force_instantiate || |
| FunctionTemplateInfo::cast(*setter).BreakAtEntry()) { |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, setter, |
| InstantiateFunction(isolate, |
| Handle<FunctionTemplateInfo>::cast(setter)), |
| Object); |
| } |
| } |
| RETURN_ON_EXCEPTION( |
| isolate, |
| JSObject::DefineAccessor(object, name, getter, setter, attributes), |
| Object); |
| return object; |
| } |
| |
| MaybeHandle<Object> DefineDataProperty(Isolate* isolate, |
| Handle<JSObject> object, |
| Handle<Name> name, |
| Handle<Object> prop_data, |
| PropertyAttributes attributes) { |
| Handle<Object> value; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, value, |
| Instantiate(isolate, prop_data, name), Object); |
| |
| LookupIterator::Key key(isolate, name); |
| LookupIterator it(isolate, object, key, LookupIterator::OWN_SKIP_INTERCEPTOR); |
| |
| #ifdef DEBUG |
| Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it); |
| DCHECK(maybe.IsJust()); |
| if (it.IsFound()) { |
| THROW_NEW_ERROR( |
| isolate, |
| NewTypeError(MessageTemplate::kDuplicateTemplateProperty, name), |
| Object); |
| } |
| #endif |
| |
| MAYBE_RETURN_NULL(Object::AddDataProperty(&it, value, attributes, |
| Just(ShouldThrow::kThrowOnError), |
| StoreOrigin::kNamed)); |
| return value; |
| } |
| |
| void DisableAccessChecks(Isolate* isolate, Handle<JSObject> object) { |
| Handle<Map> old_map(object->map(), isolate); |
| // Copy map so it won't interfere constructor's initial map. |
| Handle<Map> new_map = Map::Copy(isolate, old_map, "DisableAccessChecks"); |
| new_map->set_is_access_check_needed(false); |
| JSObject::MigrateToMap(isolate, Handle<JSObject>::cast(object), new_map); |
| } |
| |
| void EnableAccessChecks(Isolate* isolate, Handle<JSObject> object) { |
| Handle<Map> old_map(object->map(), isolate); |
| // Copy map so it won't interfere constructor's initial map. |
| Handle<Map> new_map = Map::Copy(isolate, old_map, "EnableAccessChecks"); |
| new_map->set_is_access_check_needed(true); |
| new_map->set_may_have_interesting_symbols(true); |
| JSObject::MigrateToMap(isolate, object, new_map); |
| } |
| |
| class AccessCheckDisableScope { |
| public: |
| AccessCheckDisableScope(Isolate* isolate, Handle<JSObject> obj) |
| : isolate_(isolate), |
| disabled_(obj->map().is_access_check_needed()), |
| obj_(obj) { |
| if (disabled_) { |
| DisableAccessChecks(isolate_, obj_); |
| } |
| } |
| ~AccessCheckDisableScope() { |
| if (disabled_) { |
| EnableAccessChecks(isolate_, obj_); |
| } |
| } |
| |
| private: |
| Isolate* isolate_; |
| const bool disabled_; |
| Handle<JSObject> obj_; |
| }; |
| |
| Object GetIntrinsic(Isolate* isolate, v8::Intrinsic intrinsic) { |
| Handle<Context> native_context = isolate->native_context(); |
| DCHECK(!native_context.is_null()); |
| switch (intrinsic) { |
| #define GET_INTRINSIC_VALUE(name, iname) \ |
| case v8::k##name: \ |
| return native_context->iname(); |
| V8_INTRINSICS_LIST(GET_INTRINSIC_VALUE) |
| #undef GET_INTRINSIC_VALUE |
| } |
| return Object(); |
| } |
| |
| template <typename TemplateInfoT> |
| MaybeHandle<JSObject> ConfigureInstance(Isolate* isolate, Handle<JSObject> obj, |
| Handle<TemplateInfoT> data) { |
| HandleScope scope(isolate); |
| // Disable access checks while instantiating the object. |
| AccessCheckDisableScope access_check_scope(isolate, obj); |
| |
| // Walk the inheritance chain and copy all accessors to current object. |
| int max_number_of_properties = 0; |
| TemplateInfoT info = *data; |
| while (!info.is_null()) { |
| Object props = info.property_accessors(); |
| if (!props.IsUndefined(isolate)) { |
| max_number_of_properties += TemplateList::cast(props).length(); |
| } |
| info = info.GetParent(isolate); |
| } |
| |
| if (max_number_of_properties > 0) { |
| int valid_descriptors = 0; |
| // Use a temporary FixedArray to accumulate unique accessors. |
| Handle<FixedArray> array = |
| isolate->factory()->NewFixedArray(max_number_of_properties); |
| |
| for (Handle<TemplateInfoT> temp(*data, isolate); !temp->is_null(); |
| temp = handle(temp->GetParent(isolate), isolate)) { |
| // Accumulate accessors. |
| Object maybe_properties = temp->property_accessors(); |
| if (!maybe_properties.IsUndefined(isolate)) { |
| valid_descriptors = AccessorInfo::AppendUnique( |
| isolate, handle(maybe_properties, isolate), array, |
| valid_descriptors); |
| } |
| } |
| |
| // Install accumulated accessors. |
| for (int i = 0; i < valid_descriptors; i++) { |
| Handle<AccessorInfo> accessor(AccessorInfo::cast(array->get(i)), isolate); |
| Handle<Name> name(Name::cast(accessor->name()), isolate); |
| JSObject::SetAccessor(obj, name, accessor, |
| accessor->initial_property_attributes()) |
| .Assert(); |
| } |
| } |
| |
| Object maybe_property_list = data->property_list(); |
| if (maybe_property_list.IsUndefined(isolate)) return obj; |
| Handle<TemplateList> properties(TemplateList::cast(maybe_property_list), |
| isolate); |
| if (properties->length() == 0) return obj; |
| |
| int i = 0; |
| for (int c = 0; c < data->number_of_properties(); c++) { |
| auto name = handle(Name::cast(properties->get(i++)), isolate); |
| Object bit = properties->get(i++); |
| if (bit.IsSmi()) { |
| PropertyDetails details(Smi::cast(bit)); |
| PropertyAttributes attributes = details.attributes(); |
| PropertyKind kind = details.kind(); |
| |
| if (kind == kData) { |
| auto prop_data = handle(properties->get(i++), isolate); |
| RETURN_ON_EXCEPTION( |
| isolate, |
| DefineDataProperty(isolate, obj, name, prop_data, attributes), |
| JSObject); |
| } else { |
| auto getter = handle(properties->get(i++), isolate); |
| auto setter = handle(properties->get(i++), isolate); |
| RETURN_ON_EXCEPTION(isolate, |
| DefineAccessorProperty(isolate, obj, name, getter, |
| setter, attributes, false), |
| JSObject); |
| } |
| } else { |
| // Intrinsic data property --- Get appropriate value from the current |
| // context. |
| PropertyDetails details(Smi::cast(properties->get(i++))); |
| PropertyAttributes attributes = details.attributes(); |
| DCHECK_EQ(kData, details.kind()); |
| |
| v8::Intrinsic intrinsic = |
| static_cast<v8::Intrinsic>(Smi::ToInt(properties->get(i++))); |
| auto prop_data = handle(GetIntrinsic(isolate, intrinsic), isolate); |
| |
| RETURN_ON_EXCEPTION( |
| isolate, |
| DefineDataProperty(isolate, obj, name, prop_data, attributes), |
| JSObject); |
| } |
| } |
| return obj; |
| } |
| |
| // Whether or not to cache every instance: when we materialize a getter or |
| // setter from an lazy AccessorPair, we rely on this cache to be able to always |
| // return the same getter or setter. However, objects will be cloned anyways, |
| // so it's not observable if we didn't cache an instance. Furthermore, a badly |
| // behaved embedder might create an unlimited number of objects, so we limit |
| // the cache for those cases. |
| enum class CachingMode { kLimited, kUnlimited }; |
| |
| MaybeHandle<JSObject> ProbeInstantiationsCache( |
| Isolate* isolate, Handle<NativeContext> native_context, int serial_number, |
| CachingMode caching_mode) { |
| DCHECK_LE(1, serial_number); |
| if (serial_number <= TemplateInfo::kFastTemplateInstantiationsCacheSize) { |
| FixedArray fast_cache = |
| native_context->fast_template_instantiations_cache(); |
| Handle<Object> object{fast_cache.get(serial_number - 1), isolate}; |
| if (object->IsUndefined(isolate)) return {}; |
| return Handle<JSObject>::cast(object); |
| } |
| if (caching_mode == CachingMode::kUnlimited || |
| (serial_number <= TemplateInfo::kSlowTemplateInstantiationsCacheSize)) { |
| SimpleNumberDictionary slow_cache = |
| native_context->slow_template_instantiations_cache(); |
| InternalIndex entry = slow_cache.FindEntry(isolate, serial_number); |
| if (entry.is_found()) { |
| return handle(JSObject::cast(slow_cache.ValueAt(entry)), isolate); |
| } |
| } |
| return {}; |
| } |
| |
| void CacheTemplateInstantiation(Isolate* isolate, |
| Handle<NativeContext> native_context, |
| int serial_number, CachingMode caching_mode, |
| Handle<JSObject> object) { |
| DCHECK_LE(1, serial_number); |
| if (serial_number <= TemplateInfo::kFastTemplateInstantiationsCacheSize) { |
| Handle<FixedArray> fast_cache = |
| handle(native_context->fast_template_instantiations_cache(), isolate); |
| Handle<FixedArray> new_cache = |
| FixedArray::SetAndGrow(isolate, fast_cache, serial_number - 1, object); |
| if (*new_cache != *fast_cache) { |
| native_context->set_fast_template_instantiations_cache(*new_cache); |
| } |
| } else if (caching_mode == CachingMode::kUnlimited || |
| (serial_number <= |
| TemplateInfo::kSlowTemplateInstantiationsCacheSize)) { |
| Handle<SimpleNumberDictionary> cache = |
| handle(native_context->slow_template_instantiations_cache(), isolate); |
| auto new_cache = |
| SimpleNumberDictionary::Set(isolate, cache, serial_number, object); |
| if (*new_cache != *cache) { |
| native_context->set_slow_template_instantiations_cache(*new_cache); |
| } |
| } |
| } |
| |
| void UncacheTemplateInstantiation(Isolate* isolate, |
| Handle<NativeContext> native_context, |
| int serial_number, CachingMode caching_mode) { |
| DCHECK_LE(1, serial_number); |
| if (serial_number <= TemplateInfo::kFastTemplateInstantiationsCacheSize) { |
| FixedArray fast_cache = |
| native_context->fast_template_instantiations_cache(); |
| DCHECK(!fast_cache.get(serial_number - 1).IsUndefined(isolate)); |
| fast_cache.set_undefined(serial_number - 1); |
| } else if (caching_mode == CachingMode::kUnlimited || |
| (serial_number <= |
| TemplateInfo::kSlowTemplateInstantiationsCacheSize)) { |
| Handle<SimpleNumberDictionary> cache = |
| handle(native_context->slow_template_instantiations_cache(), isolate); |
| InternalIndex entry = cache->FindEntry(isolate, serial_number); |
| DCHECK(entry.is_found()); |
| cache = SimpleNumberDictionary::DeleteEntry(isolate, cache, entry); |
| native_context->set_slow_template_instantiations_cache(*cache); |
| } |
| } |
| |
| bool IsSimpleInstantiation(Isolate* isolate, ObjectTemplateInfo info, |
| JSReceiver new_target) { |
| DisallowHeapAllocation no_gc; |
| |
| if (!new_target.IsJSFunction()) return false; |
| JSFunction fun = JSFunction::cast(new_target); |
| if (fun.shared().function_data(kAcquireLoad) != info.constructor()) |
| return false; |
| if (info.immutable_proto()) return false; |
| return fun.context().native_context() == isolate->raw_native_context(); |
| } |
| |
| MaybeHandle<JSObject> InstantiateObject(Isolate* isolate, |
| Handle<ObjectTemplateInfo> info, |
| Handle<JSReceiver> new_target, |
| bool is_prototype) { |
| Handle<JSFunction> constructor; |
| int serial_number = info->serial_number(); |
| if (!new_target.is_null()) { |
| if (IsSimpleInstantiation(isolate, *info, *new_target)) { |
| constructor = Handle<JSFunction>::cast(new_target); |
| } else { |
| // Disable caching for subclass instantiation. |
| serial_number = 0; |
| } |
| } |
| // Fast path. |
| Handle<JSObject> result; |
| if (serial_number) { |
| if (ProbeInstantiationsCache(isolate, isolate->native_context(), |
| serial_number, CachingMode::kLimited) |
| .ToHandle(&result)) { |
| return isolate->factory()->CopyJSObject(result); |
| } |
| } |
| |
| if (constructor.is_null()) { |
| Object maybe_constructor_info = info->constructor(); |
| if (maybe_constructor_info.IsUndefined(isolate)) { |
| constructor = isolate->object_function(); |
| } else { |
| // Enter a new scope. Recursion could otherwise create a lot of handles. |
| HandleScope scope(isolate); |
| Handle<FunctionTemplateInfo> cons_templ( |
| FunctionTemplateInfo::cast(maybe_constructor_info), isolate); |
| Handle<JSFunction> tmp_constructor; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, tmp_constructor, |
| InstantiateFunction(isolate, cons_templ), |
| JSObject); |
| constructor = scope.CloseAndEscape(tmp_constructor); |
| } |
| |
| if (new_target.is_null()) new_target = constructor; |
| } |
| |
| Handle<JSObject> object; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, object, |
| JSObject::New(constructor, new_target, Handle<AllocationSite>::null()), |
| JSObject); |
| |
| if (is_prototype) JSObject::OptimizeAsPrototype(object); |
| |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, result, ConfigureInstance(isolate, object, info), JSObject); |
| if (info->immutable_proto()) { |
| JSObject::SetImmutableProto(object); |
| } |
| if (!is_prototype) { |
| // Keep prototypes in slow-mode. Let them be lazily turned fast later on. |
| // TODO(dcarney): is this necessary? |
| JSObject::MigrateSlowToFast(result, 0, "ApiNatives::InstantiateObject"); |
| // Don't cache prototypes. |
| if (serial_number) { |
| CacheTemplateInstantiation(isolate, isolate->native_context(), |
| serial_number, CachingMode::kLimited, result); |
| result = isolate->factory()->CopyJSObject(result); |
| } |
| } |
| |
| return result; |
| } |
| |
| namespace { |
| MaybeHandle<Object> GetInstancePrototype(Isolate* isolate, |
| Handle<Object> function_template) { |
| // Enter a new scope. Recursion could otherwise create a lot of handles. |
| HandleScope scope(isolate); |
| Handle<JSFunction> parent_instance; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, parent_instance, |
| InstantiateFunction( |
| isolate, Handle<FunctionTemplateInfo>::cast(function_template)), |
| JSFunction); |
| Handle<Object> instance_prototype; |
| // TODO(cbruni): decide what to do here. |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, instance_prototype, |
| JSObject::GetProperty(isolate, parent_instance, |
| isolate->factory()->prototype_string()), |
| JSFunction); |
| return scope.CloseAndEscape(instance_prototype); |
| } |
| } // namespace |
| |
| MaybeHandle<JSFunction> InstantiateFunction( |
| Isolate* isolate, Handle<NativeContext> native_context, |
| Handle<FunctionTemplateInfo> data, MaybeHandle<Name> maybe_name) { |
| int serial_number = data->serial_number(); |
| if (serial_number) { |
| Handle<JSObject> result; |
| if (ProbeInstantiationsCache(isolate, native_context, serial_number, |
| CachingMode::kUnlimited) |
| .ToHandle(&result)) { |
| return Handle<JSFunction>::cast(result); |
| } |
| } |
| Handle<Object> prototype; |
| if (!data->remove_prototype()) { |
| Handle<Object> prototype_templ(data->GetPrototypeTemplate(), isolate); |
| if (prototype_templ->IsUndefined(isolate)) { |
| Handle<Object> protoype_provider_templ( |
| data->GetPrototypeProviderTemplate(), isolate); |
| if (protoype_provider_templ->IsUndefined(isolate)) { |
| prototype = isolate->factory()->NewJSObject(isolate->object_function()); |
| } else { |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, prototype, |
| GetInstancePrototype(isolate, protoype_provider_templ), JSFunction); |
| } |
| } else { |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, prototype, |
| InstantiateObject(isolate, |
| Handle<ObjectTemplateInfo>::cast(prototype_templ), |
| Handle<JSReceiver>(), true), |
| JSFunction); |
| } |
| Handle<Object> parent(data->GetParentTemplate(), isolate); |
| if (!parent->IsUndefined(isolate)) { |
| Handle<Object> parent_prototype; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, parent_prototype, |
| GetInstancePrototype(isolate, parent), |
| JSFunction); |
| CHECK(parent_prototype->IsHeapObject()); |
| JSObject::ForceSetPrototype(Handle<JSObject>::cast(prototype), |
| Handle<HeapObject>::cast(parent_prototype)); |
| } |
| } |
| InstanceType function_type = |
| (!data->needs_access_check() && |
| data->GetNamedPropertyHandler().IsUndefined(isolate) && |
| data->GetIndexedPropertyHandler().IsUndefined(isolate)) |
| ? JS_API_OBJECT_TYPE |
| : JS_SPECIAL_API_OBJECT_TYPE; |
| |
| Handle<JSFunction> function = ApiNatives::CreateApiFunction( |
| isolate, native_context, data, prototype, function_type, maybe_name); |
| if (serial_number) { |
| // Cache the function. |
| CacheTemplateInstantiation(isolate, native_context, serial_number, |
| CachingMode::kUnlimited, function); |
| } |
| MaybeHandle<JSObject> result = ConfigureInstance(isolate, function, data); |
| if (result.is_null()) { |
| // Uncache on error. |
| if (serial_number) { |
| UncacheTemplateInstantiation(isolate, native_context, serial_number, |
| CachingMode::kUnlimited); |
| } |
| return MaybeHandle<JSFunction>(); |
| } |
| return function; |
| } |
| |
| void AddPropertyToPropertyList(Isolate* isolate, Handle<TemplateInfo> templ, |
| int length, Handle<Object>* data) { |
| Object maybe_list = templ->property_list(); |
| Handle<TemplateList> list; |
| if (maybe_list.IsUndefined(isolate)) { |
| list = TemplateList::New(isolate, length); |
| } else { |
| list = handle(TemplateList::cast(maybe_list), isolate); |
| } |
| templ->set_number_of_properties(templ->number_of_properties() + 1); |
| for (int i = 0; i < length; i++) { |
| Handle<Object> value = |
| data[i].is_null() |
| ? Handle<Object>::cast(isolate->factory()->undefined_value()) |
| : data[i]; |
| list = TemplateList::Add(isolate, list, value); |
| } |
| templ->set_property_list(*list); |
| } |
| |
| } // namespace |
| |
| MaybeHandle<JSFunction> ApiNatives::InstantiateFunction( |
| Isolate* isolate, Handle<NativeContext> native_context, |
| Handle<FunctionTemplateInfo> data, MaybeHandle<Name> maybe_name) { |
| InvokeScope invoke_scope(isolate); |
| return ::v8::internal::InstantiateFunction(isolate, native_context, data, |
| maybe_name); |
| } |
| |
| MaybeHandle<JSFunction> ApiNatives::InstantiateFunction( |
| Handle<FunctionTemplateInfo> data, MaybeHandle<Name> maybe_name) { |
| Isolate* isolate = data->GetIsolate(); |
| InvokeScope invoke_scope(isolate); |
| return ::v8::internal::InstantiateFunction(isolate, data, maybe_name); |
| } |
| |
| MaybeHandle<JSObject> ApiNatives::InstantiateObject( |
| Isolate* isolate, Handle<ObjectTemplateInfo> data, |
| Handle<JSReceiver> new_target) { |
| InvokeScope invoke_scope(isolate); |
| return ::v8::internal::InstantiateObject(isolate, data, new_target, false); |
| } |
| |
| MaybeHandle<JSObject> ApiNatives::InstantiateRemoteObject( |
| Handle<ObjectTemplateInfo> data) { |
| Isolate* isolate = data->GetIsolate(); |
| InvokeScope invoke_scope(isolate); |
| |
| Handle<FunctionTemplateInfo> constructor( |
| FunctionTemplateInfo::cast(data->constructor()), isolate); |
| Handle<Map> object_map = isolate->factory()->NewMap( |
| JS_SPECIAL_API_OBJECT_TYPE, |
| JSObject::kHeaderSize + |
| data->embedder_field_count() * kEmbedderDataSlotSize, |
| TERMINAL_FAST_ELEMENTS_KIND); |
| object_map->SetConstructor(*constructor); |
| object_map->set_is_access_check_needed(true); |
| object_map->set_may_have_interesting_symbols(true); |
| |
| Handle<JSObject> object = isolate->factory()->NewJSObjectFromMap(object_map); |
| JSObject::ForceSetPrototype(object, isolate->factory()->null_value()); |
| |
| return object; |
| } |
| |
| void ApiNatives::AddDataProperty(Isolate* isolate, Handle<TemplateInfo> info, |
| Handle<Name> name, Handle<Object> value, |
| PropertyAttributes attributes) { |
| PropertyDetails details(kData, attributes, PropertyCellType::kNoCell); |
| auto details_handle = handle(details.AsSmi(), isolate); |
| Handle<Object> data[] = {name, details_handle, value}; |
| AddPropertyToPropertyList(isolate, info, arraysize(data), data); |
| } |
| |
| void ApiNatives::AddDataProperty(Isolate* isolate, Handle<TemplateInfo> info, |
| Handle<Name> name, v8::Intrinsic intrinsic, |
| PropertyAttributes attributes) { |
| auto value = handle(Smi::FromInt(intrinsic), isolate); |
| auto intrinsic_marker = isolate->factory()->true_value(); |
| PropertyDetails details(kData, attributes, PropertyCellType::kNoCell); |
| auto details_handle = handle(details.AsSmi(), isolate); |
| Handle<Object> data[] = {name, intrinsic_marker, details_handle, value}; |
| AddPropertyToPropertyList(isolate, info, arraysize(data), data); |
| } |
| |
| void ApiNatives::AddAccessorProperty(Isolate* isolate, |
| Handle<TemplateInfo> info, |
| Handle<Name> name, |
| Handle<FunctionTemplateInfo> getter, |
| Handle<FunctionTemplateInfo> setter, |
| PropertyAttributes attributes) { |
| PropertyDetails details(kAccessor, attributes, PropertyCellType::kNoCell); |
| auto details_handle = handle(details.AsSmi(), isolate); |
| Handle<Object> data[] = {name, details_handle, getter, setter}; |
| AddPropertyToPropertyList(isolate, info, arraysize(data), data); |
| } |
| |
| void ApiNatives::AddNativeDataProperty(Isolate* isolate, |
| Handle<TemplateInfo> info, |
| Handle<AccessorInfo> property) { |
| Object maybe_list = info->property_accessors(); |
| Handle<TemplateList> list; |
| if (maybe_list.IsUndefined(isolate)) { |
| list = TemplateList::New(isolate, 1); |
| } else { |
| list = handle(TemplateList::cast(maybe_list), isolate); |
| } |
| list = TemplateList::Add(isolate, list, property); |
| info->set_property_accessors(*list); |
| } |
| |
| Handle<JSFunction> ApiNatives::CreateApiFunction( |
| Isolate* isolate, Handle<NativeContext> native_context, |
| Handle<FunctionTemplateInfo> obj, Handle<Object> prototype, |
| InstanceType type, MaybeHandle<Name> maybe_name) { |
| Handle<SharedFunctionInfo> shared = |
| FunctionTemplateInfo::GetOrCreateSharedFunctionInfo(isolate, obj, |
| maybe_name); |
| // To simplify things, API functions always have shared name. |
| DCHECK(shared->HasSharedName()); |
| |
| Handle<JSFunction> result = |
| isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, |
| native_context); |
| |
| if (obj->remove_prototype()) { |
| DCHECK(prototype.is_null()); |
| DCHECK(result->shared().IsApiFunction()); |
| DCHECK(!result->IsConstructor()); |
| DCHECK(!result->has_prototype_slot()); |
| return result; |
| } |
| |
| // Down from here is only valid for API functions that can be used as a |
| // constructor (don't set the "remove prototype" flag). |
| DCHECK(result->has_prototype_slot()); |
| |
| if (obj->read_only_prototype()) { |
| result->set_map(*isolate->sloppy_function_with_readonly_prototype_map()); |
| } |
| |
| if (prototype->IsTheHole(isolate)) { |
| prototype = isolate->factory()->NewFunctionPrototype(result); |
| } else if (obj->GetPrototypeProviderTemplate().IsUndefined(isolate)) { |
| JSObject::AddProperty(isolate, Handle<JSObject>::cast(prototype), |
| isolate->factory()->constructor_string(), result, |
| DONT_ENUM); |
| } |
| |
| int embedder_field_count = 0; |
| bool immutable_proto = false; |
| if (!obj->GetInstanceTemplate().IsUndefined(isolate)) { |
| Handle<ObjectTemplateInfo> GetInstanceTemplate = Handle<ObjectTemplateInfo>( |
| ObjectTemplateInfo::cast(obj->GetInstanceTemplate()), isolate); |
| embedder_field_count = GetInstanceTemplate->embedder_field_count(); |
| immutable_proto = GetInstanceTemplate->immutable_proto(); |
| } |
| |
| // JS_FUNCTION_TYPE requires information about the prototype slot. |
| DCHECK_NE(JS_FUNCTION_TYPE, type); |
| int instance_size = JSObject::GetHeaderSize(type) + |
| kEmbedderDataSlotSize * embedder_field_count; |
| |
| Handle<Map> map = isolate->factory()->NewMap(type, instance_size, |
| TERMINAL_FAST_ELEMENTS_KIND); |
| JSFunction::SetInitialMap(result, map, Handle<JSObject>::cast(prototype)); |
| |
| // Mark as undetectable if needed. |
| if (obj->undetectable()) { |
| // We only allow callable undetectable receivers here, since this whole |
| // undetectable business is only to support document.all, which is both |
| // undetectable and callable. If we ever see the need to have an object |
| // that is undetectable but not callable, we need to update the types.h |
| // to allow encoding this. |
| CHECK(!obj->GetInstanceCallHandler().IsUndefined(isolate)); |
| map->set_is_undetectable(true); |
| } |
| |
| // Mark as needs_access_check if needed. |
| if (obj->needs_access_check()) { |
| map->set_is_access_check_needed(true); |
| map->set_may_have_interesting_symbols(true); |
| } |
| |
| // Set interceptor information in the map. |
| if (!obj->GetNamedPropertyHandler().IsUndefined(isolate)) { |
| map->set_has_named_interceptor(true); |
| map->set_may_have_interesting_symbols(true); |
| } |
| if (!obj->GetIndexedPropertyHandler().IsUndefined(isolate)) { |
| map->set_has_indexed_interceptor(true); |
| } |
| |
| // Mark instance as callable in the map. |
| if (!obj->GetInstanceCallHandler().IsUndefined(isolate)) { |
| map->set_is_callable(true); |
| map->set_is_constructor(!obj->undetectable()); |
| } |
| |
| if (immutable_proto) map->set_is_immutable_proto(true); |
| |
| return result; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |
