| // Copyright 2014 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/runtime/runtime-utils.h" |
| |
| #include "src/arguments.h" |
| #include "src/bootstrapper.h" |
| #include "src/debug/debug.h" |
| #include "src/isolate-inl.h" |
| #include "src/messages.h" |
| #include "src/property-descriptor.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| MaybeHandle<Object> Runtime::GetObjectProperty(Isolate* isolate, |
| Handle<Object> object, |
| Handle<Object> key, |
| LanguageMode language_mode) { |
| if (object->IsUndefined() || object->IsNull()) { |
| THROW_NEW_ERROR( |
| isolate, |
| NewTypeError(MessageTemplate::kNonObjectPropertyLoad, key, object), |
| Object); |
| } |
| |
| bool success = false; |
| LookupIterator it = |
| LookupIterator::PropertyOrElement(isolate, object, key, &success); |
| if (!success) return MaybeHandle<Object>(); |
| |
| return Object::GetProperty(&it, language_mode); |
| } |
| |
| |
| static MaybeHandle<Object> KeyedGetObjectProperty(Isolate* isolate, |
| Handle<Object> receiver_obj, |
| Handle<Object> key_obj, |
| LanguageMode language_mode) { |
| // Fast cases for getting named properties of the receiver JSObject |
| // itself. |
| // |
| // The global proxy objects has to be excluded since LookupOwn on |
| // the global proxy object can return a valid result even though the |
| // global proxy object never has properties. This is the case |
| // because the global proxy object forwards everything to its hidden |
| // prototype including own lookups. |
| // |
| // Additionally, we need to make sure that we do not cache results |
| // for objects that require access checks. |
| if (receiver_obj->IsJSObject()) { |
| if (!receiver_obj->IsJSGlobalProxy() && |
| !receiver_obj->IsAccessCheckNeeded() && key_obj->IsName()) { |
| DisallowHeapAllocation no_allocation; |
| Handle<JSObject> receiver = Handle<JSObject>::cast(receiver_obj); |
| Handle<Name> key = Handle<Name>::cast(key_obj); |
| if (receiver->IsJSGlobalObject()) { |
| // Attempt dictionary lookup. |
| GlobalDictionary* dictionary = receiver->global_dictionary(); |
| int entry = dictionary->FindEntry(key); |
| if (entry != GlobalDictionary::kNotFound) { |
| DCHECK(dictionary->ValueAt(entry)->IsPropertyCell()); |
| PropertyCell* cell = PropertyCell::cast(dictionary->ValueAt(entry)); |
| if (cell->property_details().type() == DATA) { |
| Object* value = cell->value(); |
| if (!value->IsTheHole()) return Handle<Object>(value, isolate); |
| // If value is the hole (meaning, absent) do the general lookup. |
| } |
| } |
| } else if (!receiver->HasFastProperties()) { |
| // Attempt dictionary lookup. |
| NameDictionary* dictionary = receiver->property_dictionary(); |
| int entry = dictionary->FindEntry(key); |
| if ((entry != NameDictionary::kNotFound) && |
| (dictionary->DetailsAt(entry).type() == DATA)) { |
| Object* value = dictionary->ValueAt(entry); |
| return Handle<Object>(value, isolate); |
| } |
| } |
| } else if (key_obj->IsSmi()) { |
| // JSObject without a name key. If the key is a Smi, check for a |
| // definite out-of-bounds access to elements, which is a strong indicator |
| // that subsequent accesses will also call the runtime. Proactively |
| // transition elements to FAST_*_ELEMENTS to avoid excessive boxing of |
| // doubles for those future calls in the case that the elements would |
| // become FAST_DOUBLE_ELEMENTS. |
| Handle<JSObject> js_object = Handle<JSObject>::cast(receiver_obj); |
| ElementsKind elements_kind = js_object->GetElementsKind(); |
| if (IsFastDoubleElementsKind(elements_kind)) { |
| if (Smi::cast(*key_obj)->value() >= js_object->elements()->length()) { |
| elements_kind = IsFastHoleyElementsKind(elements_kind) |
| ? FAST_HOLEY_ELEMENTS |
| : FAST_ELEMENTS; |
| JSObject::TransitionElementsKind(js_object, elements_kind); |
| } |
| } else { |
| DCHECK(IsFastSmiOrObjectElementsKind(elements_kind) || |
| !IsFastElementsKind(elements_kind)); |
| } |
| } |
| } else if (receiver_obj->IsString() && key_obj->IsSmi()) { |
| // Fast case for string indexing using [] with a smi index. |
| Handle<String> str = Handle<String>::cast(receiver_obj); |
| int index = Handle<Smi>::cast(key_obj)->value(); |
| if (index >= 0 && index < str->length()) { |
| Factory* factory = isolate->factory(); |
| return factory->LookupSingleCharacterStringFromCode( |
| String::Flatten(str)->Get(index)); |
| } |
| } |
| |
| // Fall back to GetObjectProperty. |
| return Runtime::GetObjectProperty(isolate, receiver_obj, key_obj, |
| language_mode); |
| } |
| |
| |
| Maybe<bool> Runtime::DeleteObjectProperty(Isolate* isolate, |
| Handle<JSReceiver> receiver, |
| Handle<Object> key, |
| LanguageMode language_mode) { |
| bool success = false; |
| LookupIterator it = LookupIterator::PropertyOrElement( |
| isolate, receiver, key, &success, LookupIterator::HIDDEN); |
| if (!success) return Nothing<bool>(); |
| |
| return JSReceiver::DeleteProperty(&it, language_mode); |
| } |
| |
| |
| MaybeHandle<Object> Runtime::SetObjectProperty(Isolate* isolate, |
| Handle<Object> object, |
| Handle<Object> key, |
| Handle<Object> value, |
| LanguageMode language_mode) { |
| if (object->IsUndefined() || object->IsNull()) { |
| THROW_NEW_ERROR( |
| isolate, |
| NewTypeError(MessageTemplate::kNonObjectPropertyStore, key, object), |
| Object); |
| } |
| |
| // Check if the given key is an array index. |
| bool success = false; |
| LookupIterator it = |
| LookupIterator::PropertyOrElement(isolate, object, key, &success); |
| if (!success) return MaybeHandle<Object>(); |
| |
| MAYBE_RETURN_NULL(Object::SetProperty(&it, value, language_mode, |
| Object::MAY_BE_STORE_FROM_KEYED)); |
| return value; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_GetPrototype) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0); |
| Handle<Object> prototype; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, prototype, |
| Object::GetPrototype(isolate, obj)); |
| return *prototype; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_InternalSetPrototype) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(JSReceiver, obj, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1); |
| MAYBE_RETURN( |
| JSReceiver::SetPrototype(obj, prototype, false, Object::THROW_ON_ERROR), |
| isolate->heap()->exception()); |
| return *obj; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_SetPrototype) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(JSReceiver, obj, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1); |
| MAYBE_RETURN( |
| JSReceiver::SetPrototype(obj, prototype, true, Object::THROW_ON_ERROR), |
| isolate->heap()->exception()); |
| return *obj; |
| } |
| |
| |
| // Enumerator used as indices into the array returned from GetOwnProperty |
| enum PropertyDescriptorIndices { |
| IS_ACCESSOR_INDEX, |
| VALUE_INDEX, |
| GETTER_INDEX, |
| SETTER_INDEX, |
| WRITABLE_INDEX, |
| ENUMERABLE_INDEX, |
| CONFIGURABLE_INDEX, |
| DESCRIPTOR_SIZE |
| }; |
| |
| |
| MUST_USE_RESULT static MaybeHandle<Object> GetOwnProperty(Isolate* isolate, |
| Handle<JSObject> obj, |
| Handle<Name> name) { |
| Heap* heap = isolate->heap(); |
| Factory* factory = isolate->factory(); |
| |
| // Get attributes. |
| LookupIterator it = LookupIterator::PropertyOrElement(isolate, obj, name, |
| LookupIterator::HIDDEN); |
| Maybe<PropertyAttributes> maybe = JSObject::GetPropertyAttributes(&it); |
| |
| if (!maybe.IsJust()) return MaybeHandle<Object>(); |
| PropertyAttributes attrs = maybe.FromJust(); |
| if (attrs == ABSENT) return factory->undefined_value(); |
| |
| DCHECK(!isolate->has_pending_exception()); |
| Handle<FixedArray> elms = factory->NewFixedArray(DESCRIPTOR_SIZE); |
| elms->set(ENUMERABLE_INDEX, heap->ToBoolean((attrs & DONT_ENUM) == 0)); |
| elms->set(CONFIGURABLE_INDEX, heap->ToBoolean((attrs & DONT_DELETE) == 0)); |
| |
| bool is_accessor_pair = it.state() == LookupIterator::ACCESSOR && |
| it.GetAccessors()->IsAccessorPair(); |
| elms->set(IS_ACCESSOR_INDEX, heap->ToBoolean(is_accessor_pair)); |
| |
| if (is_accessor_pair) { |
| Handle<AccessorPair> accessors = |
| Handle<AccessorPair>::cast(it.GetAccessors()); |
| Handle<Object> getter(accessors->GetComponent(ACCESSOR_GETTER), isolate); |
| Handle<Object> setter(accessors->GetComponent(ACCESSOR_SETTER), isolate); |
| elms->set(GETTER_INDEX, *getter); |
| elms->set(SETTER_INDEX, *setter); |
| } else { |
| Handle<Object> value; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, value, Object::GetProperty(&it), |
| Object); |
| elms->set(WRITABLE_INDEX, heap->ToBoolean((attrs & READ_ONLY) == 0)); |
| elms->set(VALUE_INDEX, *value); |
| } |
| |
| return factory->NewJSArrayWithElements(elms); |
| } |
| |
| |
| // Returns an array with the property description: |
| // if args[1] is not a property on args[0] |
| // returns undefined |
| // if args[1] is a data property on args[0] |
| // [false, value, Writeable, Enumerable, Configurable] |
| // if args[1] is an accessor on args[0] |
| // [true, GetFunction, SetFunction, Enumerable, Configurable] |
| // TODO(jkummerow): Deprecated. Remove all callers and delete. |
| RUNTIME_FUNCTION(Runtime_GetOwnProperty_Legacy) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| GetOwnProperty(isolate, obj, name)); |
| return *result; |
| } |
| |
| |
| // ES6 19.1.2.6 |
| RUNTIME_FUNCTION(Runtime_GetOwnProperty) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, raw_name, 1); |
| // 1. Let obj be ? ToObject(O). |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, object, |
| Execution::ToObject(isolate, object)); |
| // 2. Let key be ? ToPropertyKey(P). |
| Handle<Name> key; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, key, |
| Object::ToName(isolate, raw_name)); |
| |
| // 3. Let desc be ? obj.[[GetOwnProperty]](key). |
| PropertyDescriptor desc; |
| Maybe<bool> found = JSReceiver::GetOwnPropertyDescriptor( |
| isolate, Handle<JSReceiver>::cast(object), key, &desc); |
| MAYBE_RETURN(found, isolate->heap()->exception()); |
| // 4. Return FromPropertyDescriptor(desc). |
| if (!found.FromJust()) return isolate->heap()->undefined_value(); |
| return *desc.ToObject(isolate); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_OptimizeObjectForAddingMultipleProperties) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0); |
| CONVERT_SMI_ARG_CHECKED(properties, 1); |
| // Conservative upper limit to prevent fuzz tests from going OOM. |
| RUNTIME_ASSERT(properties <= 100000); |
| if (object->HasFastProperties() && !object->IsJSGlobalProxy()) { |
| JSObject::NormalizeProperties(object, KEEP_INOBJECT_PROPERTIES, properties, |
| "OptimizeForAdding"); |
| } |
| return *object; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_LoadGlobalViaContext) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_SMI_ARG_CHECKED(slot, 0); |
| |
| // Go up context chain to the script context. |
| Handle<Context> script_context(isolate->context()->script_context(), isolate); |
| DCHECK(script_context->IsScriptContext()); |
| DCHECK(script_context->get(slot)->IsPropertyCell()); |
| |
| // Lookup the named property on the global object. |
| Handle<ScopeInfo> scope_info(script_context->scope_info(), isolate); |
| Handle<Name> name(scope_info->ContextSlotName(slot), isolate); |
| Handle<JSGlobalObject> global_object(script_context->global_object(), |
| isolate); |
| LookupIterator it(global_object, name, LookupIterator::HIDDEN); |
| |
| // Switch to fast mode only if there is a data property and it's not on |
| // a hidden prototype. |
| if (it.state() == LookupIterator::DATA && |
| it.GetHolder<Object>().is_identical_to(global_object)) { |
| // Now update the cell in the script context. |
| Handle<PropertyCell> cell = it.GetPropertyCell(); |
| script_context->set(slot, *cell); |
| } else { |
| // This is not a fast case, so keep this access in a slow mode. |
| // Store empty_property_cell here to release the outdated property cell. |
| script_context->set(slot, isolate->heap()->empty_property_cell()); |
| } |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, Object::GetProperty(&it)); |
| return *result; |
| } |
| |
| |
| namespace { |
| |
| Object* StoreGlobalViaContext(Isolate* isolate, int slot, Handle<Object> value, |
| LanguageMode language_mode) { |
| // Go up context chain to the script context. |
| Handle<Context> script_context(isolate->context()->script_context(), isolate); |
| DCHECK(script_context->IsScriptContext()); |
| DCHECK(script_context->get(slot)->IsPropertyCell()); |
| |
| // Lookup the named property on the global object. |
| Handle<ScopeInfo> scope_info(script_context->scope_info(), isolate); |
| Handle<Name> name(scope_info->ContextSlotName(slot), isolate); |
| Handle<JSGlobalObject> global_object(script_context->global_object(), |
| isolate); |
| LookupIterator it(global_object, name, LookupIterator::HIDDEN); |
| |
| // Switch to fast mode only if there is a data property and it's not on |
| // a hidden prototype. |
| if (it.state() == LookupIterator::DATA && |
| it.GetHolder<Object>().is_identical_to(global_object)) { |
| // Now update cell in the script context. |
| Handle<PropertyCell> cell = it.GetPropertyCell(); |
| script_context->set(slot, *cell); |
| } else { |
| // This is not a fast case, so keep this access in a slow mode. |
| // Store empty_property_cell here to release the outdated property cell. |
| script_context->set(slot, isolate->heap()->empty_property_cell()); |
| } |
| |
| MAYBE_RETURN(Object::SetProperty(&it, value, language_mode, |
| Object::CERTAINLY_NOT_STORE_FROM_KEYED), |
| isolate->heap()->exception()); |
| return *value; |
| } |
| |
| } // namespace |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreGlobalViaContext_Sloppy) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_SMI_ARG_CHECKED(slot, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 1); |
| |
| return StoreGlobalViaContext(isolate, slot, value, SLOPPY); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreGlobalViaContext_Strict) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_SMI_ARG_CHECKED(slot, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 1); |
| |
| return StoreGlobalViaContext(isolate, slot, value, STRICT); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_GetProperty) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| Runtime::GetObjectProperty(isolate, object, key, SLOPPY)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_GetPropertyStrong) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| Runtime::GetObjectProperty(isolate, object, key, STRONG)); |
| return *result; |
| } |
| |
| |
| // KeyedGetProperty is called from KeyedLoadIC::GenerateGeneric. |
| RUNTIME_FUNCTION(Runtime_KeyedGetProperty) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver_obj, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key_obj, 1); |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| KeyedGetObjectProperty(isolate, receiver_obj, key_obj, SLOPPY)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_KeyedGetPropertyStrong) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver_obj, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key_obj, 1); |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| KeyedGetObjectProperty(isolate, receiver_obj, key_obj, STRONG)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_AddNamedProperty) { |
| HandleScope scope(isolate); |
| RUNTIME_ASSERT(args.length() == 4); |
| |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 2); |
| CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3); |
| |
| #ifdef DEBUG |
| uint32_t index = 0; |
| DCHECK(!name->ToArrayIndex(&index)); |
| LookupIterator it(object, name, LookupIterator::OWN_SKIP_INTERCEPTOR); |
| Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it); |
| if (!maybe.IsJust()) return isolate->heap()->exception(); |
| RUNTIME_ASSERT(!it.IsFound()); |
| #endif |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| JSObject::SetOwnPropertyIgnoreAttributes(object, name, value, attrs)); |
| return *result; |
| } |
| |
| |
| // Adds an element to an array. |
| // This is used to create an indexed data property into an array. |
| RUNTIME_FUNCTION(Runtime_AddElement) { |
| HandleScope scope(isolate); |
| RUNTIME_ASSERT(args.length() == 3); |
| |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 2); |
| |
| uint32_t index = 0; |
| CHECK(key->ToArrayIndex(&index)); |
| |
| #ifdef DEBUG |
| LookupIterator it(isolate, object, index, |
| LookupIterator::OWN_SKIP_INTERCEPTOR); |
| Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it); |
| if (!maybe.IsJust()) return isolate->heap()->exception(); |
| RUNTIME_ASSERT(!it.IsFound()); |
| |
| if (object->IsJSArray()) { |
| Handle<JSArray> array = Handle<JSArray>::cast(object); |
| RUNTIME_ASSERT(!JSArray::WouldChangeReadOnlyLength(array, index)); |
| } |
| #endif |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| JSObject::SetOwnElementIgnoreAttributes(object, index, value, NONE)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_AppendElement) { |
| HandleScope scope(isolate); |
| RUNTIME_ASSERT(args.length() == 2); |
| |
| CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 1); |
| |
| uint32_t index; |
| CHECK(array->length()->ToArrayIndex(&index)); |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, JSObject::AddDataElement(array, index, value, NONE)); |
| JSObject::ValidateElements(array); |
| return *array; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_SetProperty) { |
| HandleScope scope(isolate); |
| RUNTIME_ASSERT(args.length() == 4); |
| |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 2); |
| CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode_arg, 3); |
| LanguageMode language_mode = language_mode_arg; |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| Runtime::SetObjectProperty(isolate, object, key, value, language_mode)); |
| return *result; |
| } |
| |
| |
| namespace { |
| |
| // ES6 section 12.5.4. |
| Object* DeleteProperty(Isolate* isolate, Handle<Object> object, |
| Handle<Object> key, LanguageMode language_mode) { |
| Handle<JSReceiver> receiver; |
| if (!JSReceiver::ToObject(isolate, object).ToHandle(&receiver)) { |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewTypeError(MessageTemplate::kUndefinedOrNullToObject)); |
| } |
| Maybe<bool> result = |
| Runtime::DeleteObjectProperty(isolate, receiver, key, language_mode); |
| MAYBE_RETURN(result, isolate->heap()->exception()); |
| return isolate->heap()->ToBoolean(result.FromJust()); |
| } |
| |
| } // namespace |
| |
| |
| RUNTIME_FUNCTION(Runtime_DeleteProperty_Sloppy) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); |
| return DeleteProperty(isolate, object, key, SLOPPY); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_DeleteProperty_Strict) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 1); |
| return DeleteProperty(isolate, object, key, STRICT); |
| } |
| |
| |
| static Object* HasOwnPropertyImplementation(Isolate* isolate, |
| Handle<JSObject> object, |
| Handle<Name> key) { |
| Maybe<bool> maybe = JSReceiver::HasOwnProperty(object, key); |
| if (!maybe.IsJust()) return isolate->heap()->exception(); |
| if (maybe.FromJust()) return isolate->heap()->true_value(); |
| // Handle hidden prototypes. If there's a hidden prototype above this thing |
| // then we have to check it for properties, because they are supposed to |
| // look like they are on this object. |
| PrototypeIterator iter(isolate, object); |
| if (!iter.IsAtEnd() && |
| PrototypeIterator::GetCurrent<HeapObject>(iter) |
| ->map() |
| ->is_hidden_prototype()) { |
| // TODO(verwaest): The recursion is not necessary for keys that are array |
| // indices. Removing this. |
| // Casting to JSObject is fine because JSProxies are never used as |
| // hidden prototypes. |
| return HasOwnPropertyImplementation( |
| isolate, PrototypeIterator::GetCurrent<JSObject>(iter), key); |
| } |
| RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate); |
| return isolate->heap()->false_value(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_HasOwnProperty) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0) |
| CONVERT_ARG_HANDLE_CHECKED(Name, key, 1); |
| |
| uint32_t index; |
| const bool key_is_array_index = key->AsArrayIndex(&index); |
| |
| // Only JS objects can have properties. |
| if (object->IsJSObject()) { |
| Handle<JSObject> js_obj = Handle<JSObject>::cast(object); |
| // Fast case: either the key is a real named property or it is not |
| // an array index and there are no interceptors or hidden |
| // prototypes. |
| // TODO(jkummerow): Make JSReceiver::HasOwnProperty fast enough to |
| // handle all cases directly (without this custom fast path). |
| Maybe<bool> maybe = Nothing<bool>(); |
| if (key_is_array_index) { |
| LookupIterator it(js_obj->GetIsolate(), js_obj, index, |
| LookupIterator::HIDDEN); |
| maybe = JSReceiver::HasProperty(&it); |
| } else { |
| maybe = JSObject::HasRealNamedProperty(js_obj, key); |
| } |
| if (!maybe.IsJust()) return isolate->heap()->exception(); |
| DCHECK(!isolate->has_pending_exception()); |
| if (maybe.FromJust()) { |
| return isolate->heap()->true_value(); |
| } |
| Map* map = js_obj->map(); |
| if (!key_is_array_index && !map->has_named_interceptor() && |
| !HeapObject::cast(map->prototype())->map()->is_hidden_prototype()) { |
| return isolate->heap()->false_value(); |
| } |
| // Slow case. |
| return HasOwnPropertyImplementation(isolate, Handle<JSObject>(js_obj), |
| Handle<Name>(key)); |
| } else if (object->IsString() && key_is_array_index) { |
| // Well, there is one exception: Handle [] on strings. |
| Handle<String> string = Handle<String>::cast(object); |
| if (index < static_cast<uint32_t>(string->length())) { |
| return isolate->heap()->true_value(); |
| } |
| } else if (object->IsJSProxy()) { |
| Maybe<bool> result = |
| JSReceiver::HasOwnProperty(Handle<JSProxy>::cast(object), key); |
| if (!result.IsJust()) return isolate->heap()->exception(); |
| return isolate->heap()->ToBoolean(result.FromJust()); |
| } |
| return isolate->heap()->false_value(); |
| } |
| |
| |
| // ES6 section 12.9.3, operator in. |
| RUNTIME_FUNCTION(Runtime_HasProperty) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 1); |
| |
| // Check that {object} is actually a receiver. |
| if (!object->IsJSReceiver()) { |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, |
| NewTypeError(MessageTemplate::kInvalidInOperatorUse, key, object)); |
| } |
| Handle<JSReceiver> receiver = Handle<JSReceiver>::cast(object); |
| |
| // Convert the {key} to a name. |
| Handle<Name> name; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, name, |
| Object::ToName(isolate, key)); |
| |
| // Lookup the {name} on {receiver}. |
| Maybe<bool> maybe = JSReceiver::HasProperty(receiver, name); |
| if (!maybe.IsJust()) return isolate->heap()->exception(); |
| return isolate->heap()->ToBoolean(maybe.FromJust()); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_PropertyIsEnumerable) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| |
| CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, key, 1); |
| |
| Maybe<PropertyAttributes> maybe = |
| JSReceiver::GetOwnPropertyAttributes(object, key); |
| if (!maybe.IsJust()) return isolate->heap()->exception(); |
| if (maybe.FromJust() == ABSENT) return isolate->heap()->false_value(); |
| return isolate->heap()->ToBoolean((maybe.FromJust() & DONT_ENUM) == 0); |
| } |
| |
| |
| // Returns either a FixedArray or, if the given object has an enum cache that |
| // contains all enumerable properties of the object and its prototypes have |
| // none, the map of the object. This is used to speed up the check for |
| // deletions during a for-in. |
| RUNTIME_FUNCTION(Runtime_GetPropertyNamesFast) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| |
| CONVERT_ARG_CHECKED(JSReceiver, raw_object, 0); |
| |
| if (raw_object->IsSimpleEnum()) return raw_object->map(); |
| |
| HandleScope scope(isolate); |
| Handle<JSReceiver> object(raw_object); |
| Handle<FixedArray> content; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, content, JSReceiver::GetKeys(object, JSReceiver::INCLUDE_PROTOS, |
| ENUMERABLE_STRINGS)); |
| |
| // Test again, since cache may have been built by preceding call. |
| if (object->IsSimpleEnum()) return object->map(); |
| |
| return *content; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_GetOwnPropertyKeys) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0); |
| CONVERT_SMI_ARG_CHECKED(filter_value, 1); |
| PropertyFilter filter = static_cast<PropertyFilter>(filter_value); |
| |
| Handle<FixedArray> keys; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, keys, JSReceiver::GetKeys(object, JSReceiver::OWN_ONLY, filter, |
| CONVERT_TO_STRING)); |
| |
| return *isolate->factory()->NewJSArrayWithElements(keys); |
| } |
| |
| |
| // Return information on whether an object has a named or indexed interceptor. |
| // args[0]: object |
| RUNTIME_FUNCTION(Runtime_GetInterceptorInfo) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 1); |
| if (!args[0]->IsJSObject()) { |
| return Smi::FromInt(0); |
| } |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0); |
| |
| int result = 0; |
| if (obj->HasNamedInterceptor()) result |= 2; |
| if (obj->HasIndexedInterceptor()) result |= 1; |
| |
| return Smi::FromInt(result); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToFastProperties) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| if (object->IsJSObject() && !object->IsJSGlobalObject()) { |
| JSObject::MigrateSlowToFast(Handle<JSObject>::cast(object), 0, |
| "RuntimeToFastProperties"); |
| } |
| return *object; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_AllocateHeapNumber) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 0); |
| return *isolate->factory()->NewHeapNumber(0); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_NewObject) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(JSFunction, target, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSReceiver, new_target, 1); |
| Handle<JSObject> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| JSObject::New(target, new_target)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_FinalizeInstanceSize) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 1); |
| |
| CONVERT_ARG_HANDLE_CHECKED(Map, initial_map, 0); |
| initial_map->CompleteInobjectSlackTracking(); |
| |
| return isolate->heap()->undefined_value(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_GlobalProxy) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(JSFunction, function, 0); |
| return function->context()->global_proxy(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_LookupAccessor) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 3); |
| CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| CONVERT_SMI_ARG_CHECKED(flag, 2); |
| AccessorComponent component = flag == 0 ? ACCESSOR_GETTER : ACCESSOR_SETTER; |
| if (!receiver->IsJSObject()) return isolate->heap()->undefined_value(); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, |
| JSObject::GetAccessor(Handle<JSObject>::cast(receiver), name, component)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_LoadMutableDouble) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Smi, index, 1); |
| RUNTIME_ASSERT((index->value() & 1) == 1); |
| FieldIndex field_index = |
| FieldIndex::ForLoadByFieldIndex(object->map(), index->value()); |
| if (field_index.is_inobject()) { |
| RUNTIME_ASSERT(field_index.property_index() < |
| object->map()->GetInObjectProperties()); |
| } else { |
| RUNTIME_ASSERT(field_index.outobject_array_index() < |
| object->properties()->length()); |
| } |
| return *JSObject::FastPropertyAt(object, Representation::Double(), |
| field_index); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_TryMigrateInstance) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| if (!object->IsJSObject()) return Smi::FromInt(0); |
| Handle<JSObject> js_object = Handle<JSObject>::cast(object); |
| if (!js_object->map()->is_deprecated()) return Smi::FromInt(0); |
| // This call must not cause lazy deopts, because it's called from deferred |
| // code where we can't handle lazy deopts for lack of a suitable bailout |
| // ID. So we just try migration and signal failure if necessary, |
| // which will also trigger a deopt. |
| if (!JSObject::TryMigrateInstance(js_object)) return Smi::FromInt(0); |
| return *object; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_IsJSGlobalProxy) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(Object, obj, 0); |
| return isolate->heap()->ToBoolean(obj->IsJSGlobalProxy()); |
| } |
| |
| |
| static bool IsValidAccessor(Handle<Object> obj) { |
| return obj->IsUndefined() || obj->IsCallable() || obj->IsNull(); |
| } |
| |
| |
| // Implements part of 8.12.9 DefineOwnProperty. |
| // There are 3 cases that lead here: |
| // Step 4b - define a new accessor property. |
| // Steps 9c & 12 - replace an existing data property with an accessor property. |
| // Step 12 - update an existing accessor property with an accessor or generic |
| // descriptor. |
| RUNTIME_FUNCTION(Runtime_DefineAccessorPropertyUnchecked) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 5); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0); |
| RUNTIME_ASSERT(!obj->IsNull()); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, getter, 2); |
| RUNTIME_ASSERT(IsValidAccessor(getter)); |
| CONVERT_ARG_HANDLE_CHECKED(Object, setter, 3); |
| RUNTIME_ASSERT(IsValidAccessor(setter)); |
| CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 4); |
| |
| RETURN_FAILURE_ON_EXCEPTION( |
| isolate, JSObject::DefineAccessor(obj, name, getter, setter, attrs)); |
| return isolate->heap()->undefined_value(); |
| } |
| |
| |
| // Implements part of 8.12.9 DefineOwnProperty. |
| // There are 3 cases that lead here: |
| // Step 4a - define a new data property. |
| // Steps 9b & 12 - replace an existing accessor property with a data property. |
| // Step 12 - update an existing data property with a data or generic |
| // descriptor. |
| RUNTIME_FUNCTION(Runtime_DefineDataPropertyUnchecked) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 4); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 2); |
| CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3); |
| |
| LookupIterator it = LookupIterator::PropertyOrElement(isolate, object, name, |
| LookupIterator::OWN); |
| if (it.state() == LookupIterator::ACCESS_CHECK && !it.HasAccess()) { |
| return isolate->heap()->undefined_value(); |
| } |
| |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, JSObject::DefineOwnPropertyIgnoreAttributes( |
| &it, value, attrs, JSObject::DONT_FORCE_FIELD)); |
| |
| return *result; |
| } |
| |
| |
| // Return property without being observable by accessors or interceptors. |
| RUNTIME_FUNCTION(Runtime_GetDataProperty) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| return *JSReceiver::GetDataProperty(object, name); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_HasFastPackedElements) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(HeapObject, obj, 0); |
| return isolate->heap()->ToBoolean( |
| IsFastPackedElementsKind(obj->map()->elements_kind())); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ValueOf) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(Object, obj, 0); |
| if (!obj->IsJSValue()) return obj; |
| return JSValue::cast(obj)->value(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_SetValueOf) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_CHECKED(Object, obj, 0); |
| CONVERT_ARG_CHECKED(Object, value, 1); |
| if (!obj->IsJSValue()) return value; |
| JSValue::cast(obj)->set_value(value); |
| return value; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_JSValueGetValue) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(JSValue, obj, 0); |
| return JSValue::cast(obj)->value(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ObjectEquals) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_CHECKED(Object, obj1, 0); |
| CONVERT_ARG_CHECKED(Object, obj2, 1); |
| return isolate->heap()->ToBoolean(obj1 == obj2); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_IsJSReceiver) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(Object, obj, 0); |
| return isolate->heap()->ToBoolean(obj->IsJSReceiver()); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_IsStrong) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(Object, obj, 0); |
| return isolate->heap()->ToBoolean(obj->IsJSReceiver() && |
| JSReceiver::cast(obj)->map()->is_strong()); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ClassOf) { |
| SealHandleScope shs(isolate); |
| DCHECK(args.length() == 1); |
| CONVERT_ARG_CHECKED(Object, obj, 0); |
| if (!obj->IsJSReceiver()) return isolate->heap()->null_value(); |
| return JSReceiver::cast(obj)->class_name(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_DefineGetterPropertyUnchecked) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 4); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| CONVERT_ARG_HANDLE_CHECKED(JSFunction, getter, 2); |
| CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3); |
| |
| RETURN_FAILURE_ON_EXCEPTION( |
| isolate, |
| JSObject::DefineAccessor(object, name, getter, |
| isolate->factory()->null_value(), attrs)); |
| return isolate->heap()->undefined_value(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_DefineSetterPropertyUnchecked) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 4); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 1); |
| CONVERT_ARG_HANDLE_CHECKED(JSFunction, setter, 2); |
| CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3); |
| |
| RETURN_FAILURE_ON_EXCEPTION( |
| isolate, |
| JSObject::DefineAccessor(object, name, isolate->factory()->null_value(), |
| setter, attrs)); |
| return isolate->heap()->undefined_value(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToObject) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| Handle<JSReceiver> receiver; |
| if (JSReceiver::ToObject(isolate, object).ToHandle(&receiver)) { |
| return *receiver; |
| } |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewTypeError(MessageTemplate::kUndefinedOrNullToObject)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToPrimitive) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| Object::ToPrimitive(input)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToPrimitive_Number) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, Object::ToPrimitive(input, ToPrimitiveHint::kNumber)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToPrimitive_String) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, result, Object::ToPrimitive(input, ToPrimitiveHint::kString)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToNumber) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, Object::ToNumber(input)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToInteger) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| Object::ToInteger(isolate, input)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToLength) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| Object::ToLength(isolate, input)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToString) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| Object::ToString(isolate, input)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ToName) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, input, 0); |
| Handle<Object> result; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, |
| Object::ToName(isolate, input)); |
| return *result; |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_Equals) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, x, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, y, 1); |
| Maybe<bool> result = Object::Equals(x, y); |
| if (!result.IsJust()) return isolate->heap()->exception(); |
| // TODO(bmeurer): Change this at some point to return true/false instead. |
| return Smi::FromInt(result.FromJust() ? EQUAL : NOT_EQUAL); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StrictEquals) { |
| SealHandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_CHECKED(Object, x, 0); |
| CONVERT_ARG_CHECKED(Object, y, 1); |
| // TODO(bmeurer): Change this at some point to return true/false instead. |
| return Smi::FromInt(x->StrictEquals(y) ? EQUAL : NOT_EQUAL); |
| } |
| |
| |
| // TODO(bmeurer): Kill this special wrapper and use TF compatible LessThan, |
| // GreaterThan, etc. which return true or false. |
| RUNTIME_FUNCTION(Runtime_Compare) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(3, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, x, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, y, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, ncr, 2); |
| Maybe<ComparisonResult> result = Object::Compare(x, y); |
| if (result.IsJust()) { |
| switch (result.FromJust()) { |
| case ComparisonResult::kLessThan: |
| return Smi::FromInt(LESS); |
| case ComparisonResult::kEqual: |
| return Smi::FromInt(EQUAL); |
| case ComparisonResult::kGreaterThan: |
| return Smi::FromInt(GREATER); |
| case ComparisonResult::kUndefined: |
| return *ncr; |
| } |
| UNREACHABLE(); |
| } |
| return isolate->heap()->exception(); |
| } |
| |
| |
| // TODO(bmeurer): Kill this special wrapper and use TF compatible LessThan, |
| // GreaterThan, etc. which return true or false. |
| RUNTIME_FUNCTION(Runtime_Compare_Strong) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(3, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, x, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, y, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, ncr, 2); |
| Maybe<ComparisonResult> result = Object::Compare(x, y, Strength::STRONG); |
| if (result.IsJust()) { |
| switch (result.FromJust()) { |
| case ComparisonResult::kLessThan: |
| return Smi::FromInt(LESS); |
| case ComparisonResult::kEqual: |
| return Smi::FromInt(EQUAL); |
| case ComparisonResult::kGreaterThan: |
| return Smi::FromInt(GREATER); |
| case ComparisonResult::kUndefined: |
| return *ncr; |
| } |
| UNREACHABLE(); |
| } |
| return isolate->heap()->exception(); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_InstanceOf) { |
| // ECMA-262, section 11.8.6, page 54. |
| HandleScope shs(isolate); |
| DCHECK_EQ(2, args.length()); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, callable, 1); |
| // {callable} must have a [[Call]] internal method. |
| if (!callable->IsCallable()) { |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, |
| NewTypeError(MessageTemplate::kInstanceofFunctionExpected, callable)); |
| } |
| // If {object} is not a receiver, return false. |
| if (!object->IsJSReceiver()) { |
| return isolate->heap()->false_value(); |
| } |
| // Check if {callable} is bound, if so, get [[BoundTargetFunction]] from it |
| // and use that instead of {callable}. |
| while (callable->IsJSBoundFunction()) { |
| callable = |
| handle(Handle<JSBoundFunction>::cast(callable)->bound_target_function(), |
| isolate); |
| } |
| DCHECK(callable->IsCallable()); |
| // Get the "prototype" of {callable}; raise an error if it's not a receiver. |
| Handle<Object> prototype; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, prototype, |
| Object::GetProperty(callable, isolate->factory()->prototype_string())); |
| if (!prototype->IsJSReceiver()) { |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, |
| NewTypeError(MessageTemplate::kInstanceofNonobjectProto, prototype)); |
| } |
| // Return whether or not {prototype} is in the prototype chain of {object}. |
| Maybe<bool> result = Object::HasInPrototypeChain(isolate, object, prototype); |
| MAYBE_RETURN(result, isolate->heap()->exception()); |
| return isolate->heap()->ToBoolean(result.FromJust()); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_HasInPrototypeChain) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, object, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1); |
| Maybe<bool> result = Object::HasInPrototypeChain(isolate, object, prototype); |
| MAYBE_RETURN(result, isolate->heap()->exception()); |
| return isolate->heap()->ToBoolean(result.FromJust()); |
| } |
| |
| |
| // ES6 section 7.4.7 CreateIterResultObject ( value, done ) |
| RUNTIME_FUNCTION(Runtime_CreateIterResultObject) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, done, 1); |
| return *isolate->factory()->NewJSIteratorResult(value, done); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_IsAccessCheckNeeded) { |
| SealHandleScope shs(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_CHECKED(Object, object, 0); |
| return isolate->heap()->ToBoolean(object->IsAccessCheckNeeded()); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ObjectDefineProperty) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 3); |
| CONVERT_ARG_HANDLE_CHECKED(Object, o, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, name, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, attributes, 2); |
| return JSReceiver::DefineProperty(isolate, o, name, attributes); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ObjectDefineProperties) { |
| HandleScope scope(isolate); |
| DCHECK(args.length() == 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, o, 0); |
| CONVERT_ARG_HANDLE_CHECKED(Object, properties, 1); |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| isolate, o, JSReceiver::DefineProperties(isolate, o, properties)); |
| return *o; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |