+class ObjectConstructorGetPrototypeOfFunctor {
+public:
+ ObjectConstructorGetPrototypeOfFunctor(JSObject* object)
+ : m_hasSkippedFirstFrame(false)
+ , m_object(object)
+ , m_result(JSValue::encode(jsUndefined()))
+ {
+ }
+
+ EncodedJSValue result() const { return m_result; }
+
+ StackVisitor::Status operator()(StackVisitor& visitor)
+ {
+ if (!m_hasSkippedFirstFrame) {
+ m_hasSkippedFirstFrame = true;
+ return StackVisitor::Continue;
+ }
+
+ if (m_object->allowsAccessFrom(visitor->callFrame()))
+ m_result = JSValue::encode(m_object->prototype());
+ return StackVisitor::Done;
+ }
+
+private:
+ bool m_hasSkippedFirstFrame;
+ JSObject* m_object;
+ EncodedJSValue m_result;
+};
+
+EncodedJSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState* exec)
+{
+ JSObject* object = exec->argument(0).toObject(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ ObjectConstructorGetPrototypeOfFunctor functor(object);
+ exec->iterate(functor);
+ return functor.result();
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorSetPrototypeOf(ExecState* exec)
+{
+ JSValue objectValue = exec->argument(0);
+ if (objectValue.isUndefinedOrNull())
+ return throwVMTypeError(exec);
+
+ JSValue protoValue = exec->argument(1);
+ if (!protoValue.isObject() && !protoValue.isNull())
+ return throwVMTypeError(exec);
+
+ JSObject* object = objectValue.toObject(exec);
+ if (exec->hadException())
+ return JSValue::encode(objectValue);
+
+ if (!checkProtoSetterAccessAllowed(exec, object))
+ return JSValue::encode(objectValue);
+
+ if (!object->isExtensible())
+ return throwVMError(exec, createTypeError(exec, StrictModeReadonlyPropertyWriteError));
+
+ if (!object->setPrototypeWithCycleCheck(exec, protoValue)) {
+ exec->vm().throwException(exec, createError(exec, ASCIILiteral("cyclic __proto__ value")));
+ return JSValue::encode(jsUndefined());
+ }
+
+ return JSValue::encode(objectValue);
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState* exec)
+{
+ JSObject* object = exec->argument(0).toObject(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ auto propertyName = exec->argument(1).toPropertyKey(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ PropertyDescriptor descriptor;
+ if (!object->getOwnPropertyDescriptor(exec, propertyName, descriptor))
+ return JSValue::encode(jsUndefined());
+ if (exec->hadException())
+ return JSValue::encode(jsUndefined());
+
+ JSObject* description = constructEmptyObject(exec);
+ if (!descriptor.isAccessorDescriptor()) {
+ description->putDirect(exec->vm(), exec->propertyNames().value, descriptor.value() ? descriptor.value() : jsUndefined(), 0);
+ description->putDirect(exec->vm(), exec->propertyNames().writable, jsBoolean(descriptor.writable()), 0);
+ } else {
+ ASSERT(descriptor.getter());
+ ASSERT(descriptor.setter());
+ description->putDirect(exec->vm(), exec->propertyNames().get, descriptor.getter(), 0);
+ description->putDirect(exec->vm(), exec->propertyNames().set, descriptor.setter(), 0);
+ }
+
+ description->putDirect(exec->vm(), exec->propertyNames().enumerable, jsBoolean(descriptor.enumerable()), 0);
+ description->putDirect(exec->vm(), exec->propertyNames().configurable, jsBoolean(descriptor.configurable()), 0);
+
+ return JSValue::encode(description);
+}
+
+// FIXME: Use the enumeration cache.
+EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState* exec)
+{
+ JSObject* object = exec->argument(0).toObject(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ PropertyNameArray properties(exec);
+ object->methodTable(exec->vm())->getOwnPropertyNames(object, exec, properties, EnumerationMode(DontEnumPropertiesMode::Include));
+ JSArray* names = constructEmptyArray(exec, 0);
+ size_t numProperties = properties.size();
+ for (size_t i = 0; i < numProperties; i++)
+ names->push(exec, jsOwnedString(exec, properties[i].string()));
+ return JSValue::encode(names);
+}
+
+// FIXME: Use the enumeration cache.
+EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertySymbols(ExecState* exec)
+{
+ JSObject* object = exec->argument(0).toObject(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ PropertyNameArray properties(exec);
+ object->methodTable(exec->vm())->getOwnPropertyNames(object, exec, properties, EnumerationMode(DontEnumPropertiesMode::Include, SymbolPropertiesMode::Include));
+ JSArray* names = constructEmptyArray(exec, 0);
+ size_t numProperties = properties.size();
+ for (size_t i = 0; i < numProperties; i++) {
+ auto impl = properties[i].impl();
+ if (impl->isSymbol() && !exec->propertyNames().isPrivateName(*impl))
+ names->push(exec, Symbol::create(exec->vm(), static_cast<SymbolImpl&>(*impl)));
+ }
+ return JSValue::encode(names);
+}
+
+// FIXME: Use the enumeration cache.
+EncodedJSValue JSC_HOST_CALL objectConstructorKeys(ExecState* exec)
+{
+ JSObject* object = exec->argument(0).toObject(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ PropertyNameArray properties(exec);
+ object->methodTable(exec->vm())->getOwnPropertyNames(object, exec, properties, EnumerationMode());
+ JSArray* keys = constructEmptyArray(exec, 0);
+ size_t numProperties = properties.size();
+ for (size_t i = 0; i < numProperties; i++)
+ keys->push(exec, jsOwnedString(exec, properties[i].string()));
+ return JSValue::encode(keys);
+}
+
+// ES5 8.10.5 ToPropertyDescriptor
+static bool toPropertyDescriptor(ExecState* exec, JSValue in, PropertyDescriptor& desc)
+{
+ if (!in.isObject()) {
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Property description must be an object.")));
+ return false;
+ }
+ JSObject* description = asObject(in);
+
+ PropertySlot enumerableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().enumerable, enumerableSlot)) {
+ desc.setEnumerable(enumerableSlot.getValue(exec, exec->propertyNames().enumerable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot configurableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().configurable, configurableSlot)) {
+ desc.setConfigurable(configurableSlot.getValue(exec, exec->propertyNames().configurable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ JSValue value;
+ PropertySlot valueSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().value, valueSlot)) {
+ desc.setValue(valueSlot.getValue(exec, exec->propertyNames().value));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot writableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().writable, writableSlot)) {
+ desc.setWritable(writableSlot.getValue(exec, exec->propertyNames().writable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot getSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().get, getSlot)) {
+ JSValue get = getSlot.getValue(exec, exec->propertyNames().get);
+ if (exec->hadException())
+ return false;
+ if (!get.isUndefined()) {
+ CallData callData;
+ if (getCallData(get, callData) == CallTypeNone) {
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Getter must be a function.")));
+ return false;
+ }
+ }
+ desc.setGetter(get);
+ }
+
+ PropertySlot setSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().set, setSlot)) {
+ JSValue set = setSlot.getValue(exec, exec->propertyNames().set);
+ if (exec->hadException())
+ return false;
+ if (!set.isUndefined()) {
+ CallData callData;
+ if (getCallData(set, callData) == CallTypeNone) {
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Setter must be a function.")));
+ return false;
+ }
+ }
+ desc.setSetter(set);
+ }
+
+ if (!desc.isAccessorDescriptor())
+ return true;
+
+ if (desc.value()) {
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Invalid property. 'value' present on property with getter or setter.")));
+ return false;
+ }
+
+ if (desc.writablePresent()) {
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Invalid property. 'writable' present on property with getter or setter.")));
+ return false;
+ }
+ return true;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Properties can only be defined on Objects.")));
+ JSObject* O = asObject(exec->argument(0));
+ auto propertyName = exec->argument(1).toPropertyKey(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ PropertyDescriptor descriptor;
+ if (!toPropertyDescriptor(exec, exec->argument(2), descriptor))
+ return JSValue::encode(jsNull());
+ ASSERT((descriptor.attributes() & Accessor) || (!descriptor.isAccessorDescriptor()));
+ ASSERT(!exec->hadException());
+ O->methodTable(exec->vm())->defineOwnProperty(O, exec, propertyName, descriptor, true);
+ return JSValue::encode(O);
+}
+
+static JSValue defineProperties(ExecState* exec, JSObject* object, JSObject* properties)
+{
+ PropertyNameArray propertyNames(exec);
+ asObject(properties)->methodTable(exec->vm())->getOwnPropertyNames(asObject(properties), exec, propertyNames, EnumerationMode(DontEnumPropertiesMode::Exclude, SymbolPropertiesMode::Include));
+ size_t numProperties = propertyNames.size();
+ Vector<PropertyDescriptor> descriptors;
+ MarkedArgumentBuffer markBuffer;
+ for (size_t i = 0; i < numProperties; i++) {
+ JSValue prop = properties->get(exec, propertyNames[i]);
+ if (exec->hadException())
+ return jsNull();
+ PropertyDescriptor descriptor;
+ if (!toPropertyDescriptor(exec, prop, descriptor))
+ return jsNull();
+ descriptors.append(descriptor);
+ // Ensure we mark all the values that we're accumulating
+ if (descriptor.isDataDescriptor() && descriptor.value())
+ markBuffer.append(descriptor.value());
+ if (descriptor.isAccessorDescriptor()) {
+ if (descriptor.getter())
+ markBuffer.append(descriptor.getter());
+ if (descriptor.setter())
+ markBuffer.append(descriptor.setter());
+ }
+ }
+ for (size_t i = 0; i < numProperties; i++) {
+ Identifier propertyName = propertyNames[i];
+ if (exec->propertyNames().isPrivateName(propertyName))
+ continue;
+ object->methodTable(exec->vm())->defineOwnProperty(object, exec, propertyName, descriptors[i], true);
+ if (exec->hadException())
+ return jsNull();
+ }
+ return object;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Properties can only be defined on Objects.")));
+ return JSValue::encode(defineProperties(exec, asObject(exec->argument(0)), exec->argument(1).toObject(exec)));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorCreate(ExecState* exec)
+{
+ JSValue proto = exec->argument(0);
+ if (!proto.isObject() && !proto.isNull())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Object prototype may only be an Object or null.")));
+ JSObject* newObject = proto.isObject()
+ ? constructEmptyObject(exec, asObject(proto))
+ : constructEmptyObject(exec, exec->lexicalGlobalObject()->nullPrototypeObjectStructure());
+ if (exec->argument(1).isUndefined())
+ return JSValue::encode(newObject);
+ if (!exec->argument(1).isObject())
+ return throwVMError(exec, createTypeError(exec, ASCIILiteral("Property descriptor list must be an Object.")));
+ return JSValue::encode(defineProperties(exec, newObject, asObject(exec->argument(1))));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorSeal(ExecState* exec)
+{
+ // 1. If Type(O) is not Object, return O.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return JSValue::encode(obj);
+ JSObject* object = asObject(obj);
+
+ if (isJSFinalObject(object)) {
+ object->seal(exec->vm());
+ return JSValue::encode(obj);
+ }
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable(exec->vm())->getOwnPropertyNames(object, exec, properties, EnumerationMode(DontEnumPropertiesMode::Include, SymbolPropertiesMode::Include));
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ Identifier propertyName = *iter;
+ if (exec->propertyNames().isPrivateName(propertyName))
+ continue;
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->getOwnPropertyDescriptor(exec, propertyName, desc))
+ continue;
+ // b. If desc.[[Configurable]] is true, set desc.[[Configurable]] to false.
+ desc.setConfigurable(false);
+ // c. Call the [[DefineOwnProperty]] internal method of O with P, desc, and true as arguments.
+ object->methodTable(exec->vm())->defineOwnProperty(object, exec, propertyName, desc, true);
+ if (exec->hadException())
+ return JSValue::encode(obj);
+ }
+
+ // 3. Set the [[Extensible]] internal property of O to false.
+ object->preventExtensions(exec->vm());
+
+ // 4. Return O.
+ return JSValue::encode(obj);
+}
+
+JSObject* objectConstructorFreeze(ExecState* exec, JSObject* object)
+{
+ if (isJSFinalObject(object) && !hasIndexedProperties(object->indexingType())) {
+ object->freeze(exec->vm());
+ return object;
+ }
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable(exec->vm())->getOwnPropertyNames(object, exec, properties, EnumerationMode(DontEnumPropertiesMode::Include, SymbolPropertiesMode::Include));
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ Identifier propertyName = *iter;
+ if (exec->propertyNames().isPrivateName(propertyName))
+ continue;
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->getOwnPropertyDescriptor(exec, propertyName, desc))
+ continue;
+ // b. If IsDataDescriptor(desc) is true, then
+ // i. If desc.[[Writable]] is true, set desc.[[Writable]] to false.
+ if (desc.isDataDescriptor())
+ desc.setWritable(false);
+ // c. If desc.[[Configurable]] is true, set desc.[[Configurable]] to false.
+ desc.setConfigurable(false);
+ // d. Call the [[DefineOwnProperty]] internal method of O with P, desc, and true as arguments.
+ object->methodTable(exec->vm())->defineOwnProperty(object, exec, propertyName, desc, true);
+ if (exec->hadException())
+ return object;
+ }
+
+ // 3. Set the [[Extensible]] internal property of O to false.
+ object->preventExtensions(exec->vm());
+
+ // 4. Return O.
+ return object;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorFreeze(ExecState* exec)
+{
+ // 1. If Type(O) is not Object, return O.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return JSValue::encode(obj);
+ return JSValue::encode(objectConstructorFreeze(exec, asObject(obj)));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorPreventExtensions(ExecState* exec)
+{
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return JSValue::encode(obj);
+ asObject(obj)->preventExtensions(exec->vm());
+ return JSValue::encode(obj);
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorIsSealed(ExecState* exec)
+{
+ // 1. If Type(O) is not Object, return true.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return JSValue::encode(jsBoolean(true));
+ JSObject* object = asObject(obj);
+
+ if (isJSFinalObject(object))
+ return JSValue::encode(jsBoolean(object->isSealed(exec->vm())));
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable(exec->vm())->getOwnPropertyNames(object, exec, properties, EnumerationMode(DontEnumPropertiesMode::Include, SymbolPropertiesMode::Include));
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ Identifier propertyName = *iter;
+ if (exec->propertyNames().isPrivateName(propertyName))
+ continue;
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->getOwnPropertyDescriptor(exec, propertyName, desc))
+ continue;
+ // b. If desc.[[Configurable]] is true, then return false.
+ if (desc.configurable())
+ return JSValue::encode(jsBoolean(false));
+ }
+
+ // 3. If the [[Extensible]] internal property of O is false, then return true.
+ // 4. Otherwise, return false.
+ return JSValue::encode(jsBoolean(!object->isExtensible()));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorIsFrozen(ExecState* exec)
+{
+ // 1. If Type(O) is not Object, return true.
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return JSValue::encode(jsBoolean(true));
+ JSObject* object = asObject(obj);
+
+ if (isJSFinalObject(object))
+ return JSValue::encode(jsBoolean(object->isFrozen(exec->vm())));
+
+ // 2. For each named own property name P of O,
+ PropertyNameArray properties(exec);
+ object->methodTable(exec->vm())->getOwnPropertyNames(object, exec, properties, EnumerationMode(DontEnumPropertiesMode::Include, SymbolPropertiesMode::Include));
+ PropertyNameArray::const_iterator end = properties.end();
+ for (PropertyNameArray::const_iterator iter = properties.begin(); iter != end; ++iter) {
+ Identifier propertyName = *iter;
+ if (exec->propertyNames().isPrivateName(propertyName))
+ continue;
+ // a. Let desc be the result of calling the [[GetOwnProperty]] internal method of O with P.
+ PropertyDescriptor desc;
+ if (!object->getOwnPropertyDescriptor(exec, propertyName, desc))
+ continue;
+ // b. If IsDataDescriptor(desc) is true then
+ // i. If desc.[[Writable]] is true, return false. c. If desc.[[Configurable]] is true, then return false.
+ if ((desc.isDataDescriptor() && desc.writable()) || desc.configurable())
+ return JSValue::encode(jsBoolean(false));
+ }
+
+ // 3. If the [[Extensible]] internal property of O is false, then return true.
+ // 4. Otherwise, return false.
+ return JSValue::encode(jsBoolean(!object->isExtensible()));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorIsExtensible(ExecState* exec)
+{
+ JSValue obj = exec->argument(0);
+ if (!obj.isObject())
+ return JSValue::encode(jsBoolean(false));
+ return JSValue::encode(jsBoolean(asObject(obj)->isExtensible()));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorIs(ExecState* exec)
+{
+ return JSValue::encode(jsBoolean(sameValue(exec, exec->argument(0), exec->argument(1))));
+}
+
projects / apple / javascriptcore.git / blobdiff