| // 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 <stdlib.h> |
| #include <limits> |
| |
| #include "src/accessors.h" |
| #include "src/arguments-inl.h" |
| #include "src/counters.h" |
| #include "src/debug/debug.h" |
| #include "src/elements.h" |
| #include "src/isolate-inl.h" |
| #include "src/message-template.h" |
| #include "src/objects/hash-table-inl.h" |
| #include "src/objects/literal-objects-inl.h" |
| #include "src/objects/smi.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| RUNTIME_FUNCTION(Runtime_ThrowUnsupportedSuperError) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(0, args.length()); |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewReferenceError(MessageTemplate::kUnsupportedSuper)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ThrowConstructorNonCallableError) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(1, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, 0); |
| Handle<String> name(constructor->shared()->Name(), isolate); |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewTypeError(MessageTemplate::kConstructorNonCallable, name)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_ThrowStaticPrototypeError) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(0, args.length()); |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewTypeError(MessageTemplate::kStaticPrototype)); |
| } |
| |
| RUNTIME_FUNCTION(Runtime_ThrowSuperAlreadyCalledError) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(0, args.length()); |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewReferenceError(MessageTemplate::kSuperAlreadyCalled)); |
| } |
| |
| RUNTIME_FUNCTION(Runtime_ThrowSuperNotCalled) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(0, args.length()); |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewReferenceError(MessageTemplate::kSuperNotCalled)); |
| } |
| |
| namespace { |
| |
| Object* ThrowNotSuperConstructor(Isolate* isolate, Handle<Object> constructor, |
| Handle<JSFunction> function) { |
| Handle<String> super_name; |
| if (constructor->IsJSFunction()) { |
| super_name = handle(Handle<JSFunction>::cast(constructor)->shared()->Name(), |
| isolate); |
| } else if (constructor->IsOddball()) { |
| DCHECK(constructor->IsNull(isolate)); |
| super_name = isolate->factory()->null_string(); |
| } else { |
| super_name = Object::NoSideEffectsToString(isolate, constructor); |
| } |
| // null constructor |
| if (super_name->length() == 0) { |
| super_name = isolate->factory()->null_string(); |
| } |
| Handle<String> function_name(function->shared()->Name(), isolate); |
| // anonymous class |
| if (function_name->length() == 0) { |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, |
| NewTypeError(MessageTemplate::kNotSuperConstructorAnonymousClass, |
| super_name)); |
| } |
| THROW_NEW_ERROR_RETURN_FAILURE( |
| isolate, NewTypeError(MessageTemplate::kNotSuperConstructor, super_name, |
| function_name)); |
| } |
| |
| } // namespace |
| |
| RUNTIME_FUNCTION(Runtime_ThrowNotSuperConstructor) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(2, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, constructor, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 1); |
| return ThrowNotSuperConstructor(isolate, constructor, function); |
| } |
| |
| RUNTIME_FUNCTION(Runtime_HomeObjectSymbol) { |
| DCHECK_EQ(0, args.length()); |
| return ReadOnlyRoots(isolate).home_object_symbol(); |
| } |
| |
| namespace { |
| |
| template <typename Dictionary> |
| Handle<Name> KeyToName(Isolate* isolate, Handle<Object> key); |
| |
| template <> |
| Handle<Name> KeyToName<NameDictionary>(Isolate* isolate, Handle<Object> key) { |
| DCHECK(key->IsName()); |
| return Handle<Name>::cast(key); |
| } |
| |
| template <> |
| Handle<Name> KeyToName<NumberDictionary>(Isolate* isolate, Handle<Object> key) { |
| DCHECK(key->IsNumber()); |
| return isolate->factory()->NumberToString(key); |
| } |
| |
| inline void SetHomeObject(Isolate* isolate, JSFunction method, |
| JSObject home_object) { |
| if (method->shared()->needs_home_object()) { |
| const int kPropertyIndex = JSFunction::kMaybeHomeObjectDescriptorIndex; |
| CHECK_EQ(method->map()->instance_descriptors()->GetKey(kPropertyIndex), |
| ReadOnlyRoots(isolate).home_object_symbol()); |
| |
| FieldIndex field_index = |
| FieldIndex::ForDescriptor(method->map(), kPropertyIndex); |
| method->RawFastPropertyAtPut(field_index, home_object); |
| } |
| } |
| |
| // Gets |index|'th argument which may be a class constructor object, a class |
| // prototype object or a class method. In the latter case the following |
| // post-processing may be required: |
| // 1) set [[HomeObject]] slot to given |home_object| value if the method's |
| // shared function info indicates that the method requires that; |
| // 2) set method's name to a concatenation of |name_prefix| and |key| if the |
| // method's shared function info indicates that method does not have a |
| // shared name. |
| template <typename Dictionary> |
| MaybeHandle<Object> GetMethodAndSetHomeObjectAndName( |
| Isolate* isolate, Arguments& args, Smi index, Handle<JSObject> home_object, |
| Handle<String> name_prefix, Handle<Object> key) { |
| int int_index = index.value(); |
| |
| // Class constructor and prototype values do not require post processing. |
| if (int_index < ClassBoilerplate::kFirstDynamicArgumentIndex) { |
| return args.at<Object>(int_index); |
| } |
| |
| Handle<JSFunction> method = args.at<JSFunction>(int_index); |
| |
| SetHomeObject(isolate, *method, *home_object); |
| |
| if (!method->shared()->HasSharedName()) { |
| // TODO(ishell): method does not have a shared name at this point only if |
| // the key is a computed property name. However, the bytecode generator |
| // explicitly generates ToName bytecodes to ensure that the computed |
| // property name is properly converted to Name. So, we can actually be smart |
| // here and avoid converting Smi keys back to Name. |
| Handle<Name> name = KeyToName<Dictionary>(isolate, key); |
| if (!JSFunction::SetName(method, name, name_prefix)) { |
| return MaybeHandle<Object>(); |
| } |
| } |
| return method; |
| } |
| |
| // Gets |index|'th argument which may be a class constructor object, a class |
| // prototype object or a class method. In the latter case the following |
| // post-processing may be required: |
| // 1) set [[HomeObject]] slot to given |home_object| value if the method's |
| // shared function info indicates that the method requires that; |
| // This is a simplified version of GetMethodWithSharedNameAndSetHomeObject() |
| // function above that is used when it's guaranteed that the method has |
| // shared name. |
| Object* GetMethodWithSharedNameAndSetHomeObject(Isolate* isolate, |
| Arguments& args, Object* index, |
| JSObject home_object) { |
| DisallowHeapAllocation no_gc; |
| int int_index = Smi::ToInt(index); |
| |
| // Class constructor and prototype values do not require post processing. |
| if (int_index < ClassBoilerplate::kFirstDynamicArgumentIndex) { |
| return args[int_index]; |
| } |
| |
| Handle<JSFunction> method = args.at<JSFunction>(int_index); |
| |
| SetHomeObject(isolate, *method, home_object); |
| |
| DCHECK(method->shared()->HasSharedName()); |
| return *method; |
| } |
| |
| template <typename Dictionary> |
| Handle<Dictionary> ShallowCopyDictionaryTemplate( |
| Isolate* isolate, Handle<Dictionary> dictionary_template) { |
| Handle<Map> dictionary_map(dictionary_template->map(), isolate); |
| Handle<Dictionary> dictionary = |
| Handle<Dictionary>::cast(isolate->factory()->CopyFixedArrayWithMap( |
| dictionary_template, dictionary_map)); |
| // Clone all AccessorPairs in the dictionary. |
| int capacity = dictionary->Capacity(); |
| for (int i = 0; i < capacity; i++) { |
| Object* value = dictionary->ValueAt(i); |
| if (value->IsAccessorPair()) { |
| Handle<AccessorPair> pair(AccessorPair::cast(value), isolate); |
| pair = AccessorPair::Copy(isolate, pair); |
| dictionary->ValueAtPut(i, *pair); |
| } |
| } |
| return dictionary; |
| } |
| |
| template <typename Dictionary> |
| bool SubstituteValues(Isolate* isolate, Handle<Dictionary> dictionary, |
| Handle<JSObject> receiver, Arguments& args, |
| bool* install_name_accessor = nullptr) { |
| Handle<Name> name_string = isolate->factory()->name_string(); |
| |
| // Replace all indices with proper methods. |
| int capacity = dictionary->Capacity(); |
| ReadOnlyRoots roots(isolate); |
| for (int i = 0; i < capacity; i++) { |
| Object* maybe_key = dictionary->KeyAt(i); |
| if (!Dictionary::IsKey(roots, maybe_key)) continue; |
| if (install_name_accessor && *install_name_accessor && |
| (maybe_key == *name_string)) { |
| *install_name_accessor = false; |
| } |
| Handle<Object> key(maybe_key, isolate); |
| Handle<Object> value(dictionary->ValueAt(i), isolate); |
| if (value->IsAccessorPair()) { |
| Handle<AccessorPair> pair = Handle<AccessorPair>::cast(value); |
| Object* tmp = pair->getter(); |
| if (tmp->IsSmi()) { |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, result, |
| GetMethodAndSetHomeObjectAndName<Dictionary>( |
| isolate, args, Smi::cast(tmp), receiver, |
| isolate->factory()->get_string(), key), |
| false); |
| pair->set_getter(*result); |
| } |
| tmp = pair->setter(); |
| if (tmp->IsSmi()) { |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, result, |
| GetMethodAndSetHomeObjectAndName<Dictionary>( |
| isolate, args, Smi::cast(tmp), receiver, |
| isolate->factory()->set_string(), key), |
| false); |
| pair->set_setter(*result); |
| } |
| } else if (value->IsSmi()) { |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, result, |
| GetMethodAndSetHomeObjectAndName<Dictionary>( |
| isolate, args, Smi::cast(*value), receiver, |
| isolate->factory()->empty_string(), key), |
| false); |
| dictionary->ValueAtPut(i, *result); |
| } |
| } |
| return true; |
| } |
| |
| bool AddDescriptorsByTemplate( |
| Isolate* isolate, Handle<Map> map, |
| Handle<DescriptorArray> descriptors_template, |
| Handle<NumberDictionary> elements_dictionary_template, |
| Handle<JSObject> receiver, Arguments& args) { |
| int nof_descriptors = descriptors_template->number_of_descriptors(); |
| |
| Handle<DescriptorArray> descriptors = |
| DescriptorArray::Allocate(isolate, nof_descriptors, 0); |
| |
| Handle<NumberDictionary> elements_dictionary = |
| *elements_dictionary_template == |
| ReadOnlyRoots(isolate).empty_slow_element_dictionary() |
| ? elements_dictionary_template |
| : ShallowCopyDictionaryTemplate(isolate, |
| elements_dictionary_template); |
| |
| Handle<PropertyArray> property_array = |
| isolate->factory()->empty_property_array(); |
| if (FLAG_track_constant_fields) { |
| // If we store constants in instances, count the number of properties |
| // that must be in the instance and create the property array to |
| // hold the constants. |
| int count = 0; |
| for (int i = 0; i < nof_descriptors; i++) { |
| PropertyDetails details = descriptors_template->GetDetails(i); |
| if (details.location() == kDescriptor && details.kind() == kData) { |
| count++; |
| } |
| } |
| property_array = isolate->factory()->NewPropertyArray(count); |
| } |
| |
| // Read values from |descriptors_template| and store possibly post-processed |
| // values into "instantiated" |descriptors| array. |
| int field_index = 0; |
| for (int i = 0; i < nof_descriptors; i++) { |
| Object* value = descriptors_template->GetStrongValue(i); |
| if (value->IsAccessorPair()) { |
| Handle<AccessorPair> pair = AccessorPair::Copy( |
| isolate, handle(AccessorPair::cast(value), isolate)); |
| value = *pair; |
| } |
| DisallowHeapAllocation no_gc; |
| Name name = descriptors_template->GetKey(i); |
| DCHECK(name->IsUniqueName()); |
| PropertyDetails details = descriptors_template->GetDetails(i); |
| if (details.location() == kDescriptor) { |
| if (details.kind() == kData) { |
| if (value->IsSmi()) { |
| value = GetMethodWithSharedNameAndSetHomeObject(isolate, args, value, |
| *receiver); |
| } |
| details = |
| details.CopyWithRepresentation(value->OptimalRepresentation()); |
| } else { |
| DCHECK_EQ(kAccessor, details.kind()); |
| if (value->IsAccessorPair()) { |
| AccessorPair* pair = AccessorPair::cast(value); |
| Object* tmp = pair->getter(); |
| if (tmp->IsSmi()) { |
| pair->set_getter(GetMethodWithSharedNameAndSetHomeObject( |
| isolate, args, tmp, *receiver)); |
| } |
| tmp = pair->setter(); |
| if (tmp->IsSmi()) { |
| pair->set_setter(GetMethodWithSharedNameAndSetHomeObject( |
| isolate, args, tmp, *receiver)); |
| } |
| } |
| } |
| } else { |
| UNREACHABLE(); |
| } |
| DCHECK(value->FitsRepresentation(details.representation())); |
| // With constant field tracking, we store the values in the instance. |
| if (FLAG_track_constant_fields && details.location() == kDescriptor && |
| details.kind() == kData) { |
| details = PropertyDetails(details.kind(), details.attributes(), kField, |
| PropertyConstness::kConst, |
| details.representation(), field_index) |
| .set_pointer(details.pointer()); |
| |
| property_array->set(field_index, value); |
| field_index++; |
| descriptors->Set(i, name, MaybeObject::FromObject(FieldType::Any()), |
| details); |
| } else { |
| descriptors->Set(i, name, MaybeObject::FromObject(value), details); |
| } |
| } |
| |
| map->InitializeDescriptors(isolate, *descriptors, |
| LayoutDescriptor::FastPointerLayout()); |
| if (elements_dictionary->NumberOfElements() > 0) { |
| if (!SubstituteValues<NumberDictionary>(isolate, elements_dictionary, |
| receiver, args)) { |
| return false; |
| } |
| map->set_elements_kind(DICTIONARY_ELEMENTS); |
| } |
| |
| // Atomically commit the changes. |
| receiver->synchronized_set_map(*map); |
| if (elements_dictionary->NumberOfElements() > 0) { |
| receiver->set_elements(*elements_dictionary); |
| } |
| if (property_array->length() > 0) { |
| receiver->SetProperties(*property_array); |
| } |
| return true; |
| } |
| |
| bool AddDescriptorsByTemplate( |
| Isolate* isolate, Handle<Map> map, |
| Handle<NameDictionary> properties_dictionary_template, |
| Handle<NumberDictionary> elements_dictionary_template, |
| Handle<FixedArray> computed_properties, Handle<JSObject> receiver, |
| bool install_name_accessor, Arguments& args) { |
| int computed_properties_length = computed_properties->length(); |
| |
| // Shallow-copy properties template. |
| Handle<NameDictionary> properties_dictionary = |
| ShallowCopyDictionaryTemplate(isolate, properties_dictionary_template); |
| Handle<NumberDictionary> elements_dictionary = |
| ShallowCopyDictionaryTemplate(isolate, elements_dictionary_template); |
| |
| typedef ClassBoilerplate::ValueKind ValueKind; |
| typedef ClassBoilerplate::ComputedEntryFlags ComputedEntryFlags; |
| |
| // Merge computed properties with properties and elements dictionary |
| // templates. |
| int i = 0; |
| while (i < computed_properties_length) { |
| int flags = Smi::ToInt(computed_properties->get(i++)); |
| |
| ValueKind value_kind = ComputedEntryFlags::ValueKindBits::decode(flags); |
| int key_index = ComputedEntryFlags::KeyIndexBits::decode(flags); |
| Object* value = Smi::FromInt(key_index + 1); // Value follows name. |
| |
| Handle<Object> key = args.at<Object>(key_index); |
| DCHECK(key->IsName()); |
| uint32_t element; |
| Handle<Name> name = Handle<Name>::cast(key); |
| if (name->AsArrayIndex(&element)) { |
| ClassBoilerplate::AddToElementsTemplate( |
| isolate, elements_dictionary, element, key_index, value_kind, value); |
| |
| } else { |
| name = isolate->factory()->InternalizeName(name); |
| ClassBoilerplate::AddToPropertiesTemplate( |
| isolate, properties_dictionary, name, key_index, value_kind, value); |
| } |
| } |
| |
| // Replace all indices with proper methods. |
| if (!SubstituteValues<NameDictionary>(isolate, properties_dictionary, |
| receiver, args, |
| &install_name_accessor)) { |
| return false; |
| } |
| if (install_name_accessor) { |
| PropertyAttributes attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY); |
| PropertyDetails details(kAccessor, attribs, PropertyCellType::kNoCell); |
| Handle<NameDictionary> dict = NameDictionary::Add( |
| isolate, properties_dictionary, isolate->factory()->name_string(), |
| isolate->factory()->function_name_accessor(), details); |
| CHECK_EQ(*dict, *properties_dictionary); |
| } |
| |
| if (elements_dictionary->NumberOfElements() > 0) { |
| if (!SubstituteValues<NumberDictionary>(isolate, elements_dictionary, |
| receiver, args)) { |
| return false; |
| } |
| map->set_elements_kind(DICTIONARY_ELEMENTS); |
| } |
| |
| // Atomically commit the changes. |
| receiver->synchronized_set_map(*map); |
| receiver->set_raw_properties_or_hash(*properties_dictionary); |
| if (elements_dictionary->NumberOfElements() > 0) { |
| receiver->set_elements(*elements_dictionary); |
| } |
| return true; |
| } |
| |
| Handle<JSObject> CreateClassPrototype(Isolate* isolate) { |
| Factory* factory = isolate->factory(); |
| |
| const int kInobjectFields = 0; |
| |
| Handle<Map> map; |
| if (FLAG_track_constant_fields) { |
| // For constant tracking we want to avoid tha hassle of handling |
| // in-object properties, so create a map with no in-object |
| // properties. |
| |
| // TODO(ishell) Support caching of zero in-object properties map |
| // by ObjectLiteralMapFromCache(). |
| map = Map::Create(isolate, 0); |
| } else { |
| // Just use some JSObject map of certain size. |
| map = factory->ObjectLiteralMapFromCache(isolate->native_context(), |
| kInobjectFields); |
| } |
| |
| return factory->NewJSObjectFromMap(map); |
| } |
| |
| bool InitClassPrototype(Isolate* isolate, |
| Handle<ClassBoilerplate> class_boilerplate, |
| Handle<JSObject> prototype, |
| Handle<Object> prototype_parent, |
| Handle<JSFunction> constructor, Arguments& args) { |
| Handle<Map> map(prototype->map(), isolate); |
| map = Map::CopyDropDescriptors(isolate, map); |
| map->set_is_prototype_map(true); |
| Map::SetPrototype(isolate, map, prototype_parent); |
| constructor->set_prototype_or_initial_map(*prototype); |
| map->SetConstructor(*constructor); |
| Handle<FixedArray> computed_properties( |
| class_boilerplate->instance_computed_properties(), isolate); |
| Handle<NumberDictionary> elements_dictionary_template( |
| NumberDictionary::cast(class_boilerplate->instance_elements_template()), |
| isolate); |
| |
| Handle<Object> properties_template( |
| class_boilerplate->instance_properties_template(), isolate); |
| if (properties_template->IsNameDictionary()) { |
| Handle<NameDictionary> properties_dictionary_template = |
| Handle<NameDictionary>::cast(properties_template); |
| |
| map->set_is_dictionary_map(true); |
| map->set_is_migration_target(false); |
| map->set_may_have_interesting_symbols(true); |
| map->set_construction_counter(Map::kNoSlackTracking); |
| |
| // We care about name property only for class constructor. |
| const bool install_name_accessor = false; |
| |
| return AddDescriptorsByTemplate( |
| isolate, map, properties_dictionary_template, |
| elements_dictionary_template, computed_properties, prototype, |
| install_name_accessor, args); |
| } else { |
| Handle<DescriptorArray> descriptors_template = |
| Handle<DescriptorArray>::cast(properties_template); |
| |
| // The size of the prototype object is known at this point. |
| // So we can create it now and then add the rest instance methods to the |
| // map. |
| return AddDescriptorsByTemplate(isolate, map, descriptors_template, |
| elements_dictionary_template, prototype, |
| args); |
| } |
| } |
| |
| bool InitClassConstructor(Isolate* isolate, |
| Handle<ClassBoilerplate> class_boilerplate, |
| Handle<Object> constructor_parent, |
| Handle<JSFunction> constructor, Arguments& args) { |
| Handle<Map> map(constructor->map(), isolate); |
| map = Map::CopyDropDescriptors(isolate, map); |
| DCHECK(map->is_prototype_map()); |
| |
| if (!constructor_parent.is_null()) { |
| // Set map's prototype without enabling prototype setup mode for superclass |
| // because it does not make sense. |
| Map::SetPrototype(isolate, map, constructor_parent, false); |
| } |
| |
| Handle<NumberDictionary> elements_dictionary_template( |
| NumberDictionary::cast(class_boilerplate->static_elements_template()), |
| isolate); |
| Handle<FixedArray> computed_properties( |
| class_boilerplate->static_computed_properties(), isolate); |
| |
| Handle<Object> properties_template( |
| class_boilerplate->static_properties_template(), isolate); |
| |
| if (properties_template->IsNameDictionary()) { |
| Handle<NameDictionary> properties_dictionary_template = |
| Handle<NameDictionary>::cast(properties_template); |
| |
| map->set_is_dictionary_map(true); |
| map->InitializeDescriptors(isolate, |
| ReadOnlyRoots(isolate).empty_descriptor_array(), |
| LayoutDescriptor::FastPointerLayout()); |
| map->set_is_migration_target(false); |
| map->set_may_have_interesting_symbols(true); |
| map->set_construction_counter(Map::kNoSlackTracking); |
| |
| bool install_name_accessor = |
| class_boilerplate->install_class_name_accessor() != 0; |
| |
| return AddDescriptorsByTemplate( |
| isolate, map, properties_dictionary_template, |
| elements_dictionary_template, computed_properties, constructor, |
| install_name_accessor, args); |
| } else { |
| Handle<DescriptorArray> descriptors_template = |
| Handle<DescriptorArray>::cast(properties_template); |
| |
| return AddDescriptorsByTemplate(isolate, map, descriptors_template, |
| elements_dictionary_template, constructor, |
| args); |
| } |
| } |
| |
| MaybeHandle<Object> DefineClass(Isolate* isolate, |
| Handle<ClassBoilerplate> class_boilerplate, |
| Handle<Object> super_class, |
| Handle<JSFunction> constructor, |
| Arguments& args) { |
| Handle<Object> prototype_parent; |
| Handle<Object> constructor_parent; |
| |
| if (super_class->IsTheHole(isolate)) { |
| prototype_parent = isolate->initial_object_prototype(); |
| } else { |
| if (super_class->IsNull(isolate)) { |
| prototype_parent = isolate->factory()->null_value(); |
| } else if (super_class->IsConstructor()) { |
| DCHECK(!super_class->IsJSFunction() || |
| !IsResumableFunction( |
| Handle<JSFunction>::cast(super_class)->shared()->kind())); |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, prototype_parent, |
| Runtime::GetObjectProperty(isolate, super_class, |
| isolate->factory()->prototype_string()), |
| Object); |
| if (!prototype_parent->IsNull(isolate) && |
| !prototype_parent->IsJSReceiver()) { |
| THROW_NEW_ERROR( |
| isolate, NewTypeError(MessageTemplate::kPrototypeParentNotAnObject, |
| prototype_parent), |
| Object); |
| } |
| // Create new handle to avoid |constructor_parent| corruption because of |
| // |super_class| handle value overwriting via storing to |
| // args[ClassBoilerplate::kPrototypeArgumentIndex] below. |
| constructor_parent = handle(*super_class, isolate); |
| } else { |
| THROW_NEW_ERROR(isolate, |
| NewTypeError(MessageTemplate::kExtendsValueNotConstructor, |
| super_class), |
| Object); |
| } |
| } |
| |
| Handle<JSObject> prototype = CreateClassPrototype(isolate); |
| DCHECK_EQ(*constructor, args[ClassBoilerplate::kConstructorArgumentIndex]); |
| args.set_at(ClassBoilerplate::kPrototypeArgumentIndex, *prototype); |
| |
| if (!InitClassConstructor(isolate, class_boilerplate, constructor_parent, |
| constructor, args) || |
| !InitClassPrototype(isolate, class_boilerplate, prototype, |
| prototype_parent, constructor, args)) { |
| DCHECK(isolate->has_pending_exception()); |
| return MaybeHandle<Object>(); |
| } |
| if (FLAG_trace_maps) { |
| LOG(isolate, |
| MapEvent("InitialMap", Map(), constructor->map(), |
| "init class constructor", constructor->shared()->DebugName())); |
| LOG(isolate, MapEvent("InitialMap", Map(), prototype->map(), |
| "init class prototype")); |
| } |
| |
| return prototype; |
| } |
| |
| } // namespace |
| |
| RUNTIME_FUNCTION(Runtime_DefineClass) { |
| HandleScope scope(isolate); |
| DCHECK_LE(ClassBoilerplate::kFirstDynamicArgumentIndex, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(ClassBoilerplate, class_boilerplate, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, super_class, 2); |
| DCHECK_EQ(class_boilerplate->arguments_count(), args.length()); |
| |
| RETURN_RESULT_OR_FAILURE( |
| isolate, |
| DefineClass(isolate, class_boilerplate, super_class, constructor, args)); |
| } |
| |
| namespace { |
| |
| enum class SuperMode { kLoad, kStore }; |
| |
| MaybeHandle<JSReceiver> GetSuperHolder( |
| Isolate* isolate, Handle<Object> receiver, Handle<JSObject> home_object, |
| SuperMode mode, MaybeHandle<Name> maybe_name, uint32_t index) { |
| if (home_object->IsAccessCheckNeeded() && |
| !isolate->MayAccess(handle(isolate->context(), isolate), home_object)) { |
| isolate->ReportFailedAccessCheck(home_object); |
| RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, JSReceiver); |
| } |
| |
| PrototypeIterator iter(isolate, home_object); |
| Handle<Object> proto = PrototypeIterator::GetCurrent(iter); |
| if (!proto->IsJSReceiver()) { |
| MessageTemplate message = mode == SuperMode::kLoad |
| ? MessageTemplate::kNonObjectPropertyLoad |
| : MessageTemplate::kNonObjectPropertyStore; |
| Handle<Name> name; |
| if (!maybe_name.ToHandle(&name)) { |
| name = isolate->factory()->Uint32ToString(index); |
| } |
| THROW_NEW_ERROR(isolate, NewTypeError(message, name, proto), JSReceiver); |
| } |
| return Handle<JSReceiver>::cast(proto); |
| } |
| |
| MaybeHandle<Object> LoadFromSuper(Isolate* isolate, Handle<Object> receiver, |
| Handle<JSObject> home_object, |
| Handle<Name> name) { |
| Handle<JSReceiver> holder; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, holder, |
| GetSuperHolder(isolate, receiver, home_object, SuperMode::kLoad, name, 0), |
| Object); |
| LookupIterator it(receiver, name, holder); |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, result, Object::GetProperty(&it), Object); |
| return result; |
| } |
| |
| MaybeHandle<Object> LoadElementFromSuper(Isolate* isolate, |
| Handle<Object> receiver, |
| Handle<JSObject> home_object, |
| uint32_t index) { |
| Handle<JSReceiver> holder; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, holder, |
| GetSuperHolder(isolate, receiver, home_object, SuperMode::kLoad, |
| MaybeHandle<Name>(), index), |
| Object); |
| LookupIterator it(isolate, receiver, index, holder); |
| Handle<Object> result; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, result, Object::GetProperty(&it), Object); |
| return result; |
| } |
| |
| } // anonymous namespace |
| |
| RUNTIME_FUNCTION(Runtime_LoadFromSuper) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(3, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 2); |
| |
| RETURN_RESULT_OR_FAILURE(isolate, |
| LoadFromSuper(isolate, receiver, home_object, name)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_LoadKeyedFromSuper) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(3, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 2); |
| |
| uint32_t index = 0; |
| |
| if (key->ToArrayIndex(&index)) { |
| RETURN_RESULT_OR_FAILURE( |
| isolate, LoadElementFromSuper(isolate, receiver, home_object, index)); |
| } |
| |
| Handle<Name> name; |
| ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, name, |
| Object::ToName(isolate, key)); |
| // TODO(verwaest): Unify using LookupIterator. |
| if (name->AsArrayIndex(&index)) { |
| RETURN_RESULT_OR_FAILURE( |
| isolate, LoadElementFromSuper(isolate, receiver, home_object, index)); |
| } |
| RETURN_RESULT_OR_FAILURE(isolate, |
| LoadFromSuper(isolate, receiver, home_object, name)); |
| } |
| |
| namespace { |
| |
| MaybeHandle<Object> StoreToSuper(Isolate* isolate, Handle<JSObject> home_object, |
| Handle<Object> receiver, Handle<Name> name, |
| Handle<Object> value, |
| LanguageMode language_mode) { |
| Handle<JSReceiver> holder; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, holder, |
| GetSuperHolder(isolate, receiver, home_object, |
| SuperMode::kStore, name, 0), |
| Object); |
| LookupIterator it(receiver, name, holder); |
| MAYBE_RETURN( |
| Object::SetSuperProperty(&it, value, language_mode, StoreOrigin::kNamed), |
| MaybeHandle<Object>()); |
| return value; |
| } |
| |
| MaybeHandle<Object> StoreElementToSuper(Isolate* isolate, |
| Handle<JSObject> home_object, |
| Handle<Object> receiver, uint32_t index, |
| Handle<Object> value, |
| LanguageMode language_mode) { |
| Handle<JSReceiver> holder; |
| ASSIGN_RETURN_ON_EXCEPTION( |
| isolate, holder, |
| GetSuperHolder(isolate, receiver, home_object, SuperMode::kStore, |
| MaybeHandle<Name>(), index), |
| Object); |
| LookupIterator it(isolate, receiver, index, holder); |
| MAYBE_RETURN(Object::SetSuperProperty(&it, value, language_mode, |
| StoreOrigin::kMaybeKeyed), |
| MaybeHandle<Object>()); |
| return value; |
| } |
| |
| } // anonymous namespace |
| |
| RUNTIME_FUNCTION(Runtime_StoreToSuper_Strict) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(4, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 3); |
| |
| RETURN_RESULT_OR_FAILURE( |
| isolate, StoreToSuper(isolate, home_object, receiver, name, value, |
| LanguageMode::kStrict)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreToSuper_Sloppy) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(4, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Name, name, 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 3); |
| |
| RETURN_RESULT_OR_FAILURE( |
| isolate, StoreToSuper(isolate, home_object, receiver, name, value, |
| LanguageMode::kSloppy)); |
| } |
| |
| static MaybeHandle<Object> StoreKeyedToSuper( |
| Isolate* isolate, Handle<JSObject> home_object, Handle<Object> receiver, |
| Handle<Object> key, Handle<Object> value, LanguageMode language_mode) { |
| uint32_t index = 0; |
| |
| if (key->ToArrayIndex(&index)) { |
| return StoreElementToSuper(isolate, home_object, receiver, index, value, |
| language_mode); |
| } |
| Handle<Name> name; |
| ASSIGN_RETURN_ON_EXCEPTION(isolate, name, Object::ToName(isolate, key), |
| Object); |
| // TODO(verwaest): Unify using LookupIterator. |
| if (name->AsArrayIndex(&index)) { |
| return StoreElementToSuper(isolate, home_object, receiver, index, value, |
| language_mode); |
| } |
| return StoreToSuper(isolate, home_object, receiver, name, value, |
| language_mode); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreKeyedToSuper_Strict) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(4, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 3); |
| |
| RETURN_RESULT_OR_FAILURE( |
| isolate, StoreKeyedToSuper(isolate, home_object, receiver, key, value, |
| LanguageMode::kStrict)); |
| } |
| |
| |
| RUNTIME_FUNCTION(Runtime_StoreKeyedToSuper_Sloppy) { |
| HandleScope scope(isolate); |
| DCHECK_EQ(4, args.length()); |
| CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0); |
| CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1); |
| CONVERT_ARG_HANDLE_CHECKED(Object, key, 2); |
| CONVERT_ARG_HANDLE_CHECKED(Object, value, 3); |
| |
| RETURN_RESULT_OR_FAILURE( |
| isolate, StoreKeyedToSuper(isolate, home_object, receiver, key, value, |
| LanguageMode::kSloppy)); |
| } |
| |
| } // namespace internal |
| } // namespace v8 |
