bool JSFunction::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot& slot) { JSFunction* thisObject = jsCast<JSFunction*>(cell); if (thisObject->isHostFunction()) return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (propertyName == exec->propertyNames().prototype) { JSGlobalData& globalData = exec->globalData(); PropertyOffset offset = thisObject->getDirectOffset(globalData, propertyName); if (!isValidOffset(offset)) { JSObject* prototype = constructEmptyObject(exec); prototype->putDirect(globalData, exec->propertyNames().constructor, thisObject, DontEnum); thisObject->putDirect(globalData, exec->propertyNames().prototype, prototype, DontDelete | DontEnum); offset = thisObject->getDirectOffset(globalData, exec->propertyNames().prototype); ASSERT(isValidOffset(offset)); } slot.setValue(thisObject, thisObject->getDirect(offset), offset); } if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, argumentsGetter); return true; } if (propertyName == exec->propertyNames().length) { slot.setCacheableCustom(thisObject, lengthGetter); return true; } if (propertyName == exec->propertyNames().name) { slot.setCacheableCustom(thisObject, nameGetter); return true; } if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, callerGetter); return true; } return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); }
bool JSFunction::getOwnPropertySlot(JSCell* cell, ExecState* exec, const Identifier& propertyName, PropertySlot& slot) { JSFunction* thisObject = static_cast<JSFunction*>(cell); if (thisObject->isHostFunction()) return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (propertyName == exec->propertyNames().prototype) { WriteBarrierBase<Unknown>* location = thisObject->getDirectLocation(exec->globalData(), propertyName); if (!location) { JSObject* prototype = constructEmptyObject(exec, thisObject->globalObject()->emptyObjectStructure()); prototype->putDirect(exec->globalData(), exec->propertyNames().constructor, thisObject, DontEnum); PutPropertySlot slot; thisObject->putDirect(exec->globalData(), exec->propertyNames().prototype, prototype, DontDelete | DontEnum, false, slot); location = thisObject->getDirectLocation(exec->globalData(), exec->propertyNames().prototype); } slot.setValue(thisObject, location->get(), thisObject->offsetForLocation(location)); } if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->initializeGetterSetterProperty(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Getter | Setter); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, argumentsGetter); return true; } if (propertyName == exec->propertyNames().length) { slot.setCacheableCustom(thisObject, lengthGetter); return true; } if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->initializeGetterSetterProperty(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Getter | Setter); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, callerGetter); return true; } return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); }
bool JSFunction::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor) { JSFunction* thisObject = jsCast<JSFunction*>(object); if (thisObject->isHostFunction()) return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); if (propertyName == exec->propertyNames().prototype) { PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot); return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); } if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); ASSERT(result); } return result; } descriptor.setDescriptor(exec->interpreter()->retrieveArgumentsFromVMCode(exec, thisObject), ReadOnly | DontEnum | DontDelete); return true; } if (propertyName == exec->propertyNames().length) { descriptor.setDescriptor(jsNumber(thisObject->jsExecutable()->parameterCount()), ReadOnly | DontEnum | DontDelete); return true; } if (propertyName == exec->propertyNames().name) { descriptor.setDescriptor(thisObject->jsExecutable()->nameValue(), ReadOnly | DontEnum | DontDelete); return true; } if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); ASSERT(result); } return result; } descriptor.setDescriptor(exec->interpreter()->retrieveCallerFromVMCode(exec, thisObject), ReadOnly | DontEnum | DontDelete); return true; } return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor); }
static EncodedJSValue JSC_HOST_CALL arrayBufferProtoFuncSlice(ExecState* exec) { JSFunction* callee = jsCast<JSFunction*>(exec->callee()); JSArrayBuffer* thisObject = jsDynamicCast<JSArrayBuffer*>(exec->thisValue()); if (!thisObject) return throwVMError(exec, createTypeError(exec, ASCIILiteral("Receiver of slice must be an array buffer."))); if (!exec->argumentCount()) return throwVMError(exec, createTypeError(exec, ASCIILiteral("Slice requires at least one argument."))); int32_t begin = exec->argument(0).toInt32(exec); if (exec->hadException()) return JSValue::encode(jsUndefined()); int32_t end; if (exec->argumentCount() >= 2) { end = exec->uncheckedArgument(1).toInt32(exec); if (exec->hadException()) return JSValue::encode(jsUndefined()); } else end = thisObject->impl()->byteLength(); RefPtr<ArrayBuffer> newBuffer = thisObject->impl()->slice(begin, end); if (!newBuffer) return throwVMError(exec, createOutOfMemoryError(exec)); Structure* structure = callee->globalObject()->arrayBufferStructure(); JSArrayBuffer* result = JSArrayBuffer::create(exec->vm(), structure, newBuffer); return JSValue::encode(result); }
EncodedJSValue JSC_HOST_CALL JSPromisePrototypeFuncThen(ExecState* exec) { JSPromise* thisObject = jsDynamicCast<JSPromise*>(exec->thisValue()); if (!thisObject) return throwVMError(exec, createTypeError(exec, "Receiver of then must be a Promise")); JSValue fulfillCallback = exec->argument(0); if (!fulfillCallback.isUndefined()) { CallData callData; CallType callType = getCallData(fulfillCallback, callData); if (callType == CallTypeNone) return throwVMError(exec, createTypeError(exec, "Expected function or undefined as as first argument")); } JSValue rejectCallback = exec->argument(1); if (!rejectCallback.isUndefined()) { CallData callData; CallType callType = getCallData(rejectCallback, callData); if (callType == CallTypeNone) return throwVMError(exec, createTypeError(exec, "Expected function or undefined as as second argument")); } JSFunction* callee = jsCast<JSFunction*>(exec->callee()); JSGlobalObject* globalObject = callee->globalObject(); // 1. Let promise be a new promise. JSPromise* promise = JSPromise::createWithResolver(exec->vm(), globalObject); // 2. Let resolver be promise's associated resolver. JSPromiseResolver* resolver = promise->resolver(); // 3. Let fulfillWrapper be a promise wrapper callback for resolver and fulfillCallback if fulfillCallback is // not omitted and a promise callback for resolver and its fulfill algorithm otherwise. InternalFunction* fulfillWrapper = wrapCallback(exec, globalObject, fulfillCallback, resolver, JSPromiseCallback::Fulfill); // 4. Let rejectWrapper be a promise wrapper callback for resolver and rejectCallback if rejectCallback is // not omitted and a promise callback for resolver and its reject algorithm otherwise. InternalFunction* rejectWrapper = wrapCallback(exec, globalObject, rejectCallback, resolver, JSPromiseCallback::Reject); // 5. Append fulfillWrapper and rejectWrapper to the context object. thisObject->appendCallbacks(exec, fulfillWrapper, rejectWrapper); // 6. Return promise. return JSValue::encode(promise); }
bool JSFunction::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor, bool throwException) { JSFunction* thisObject = jsCast<JSFunction*>(object); if (thisObject->isHostFunction()) return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); if (propertyName == exec->propertyNames().prototype) { // Make sure prototype has been reified, such that it can only be overwritten // following the rules set out in ECMA-262 8.12.9. PropertySlot slot; thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot); thisObject->m_allocationProfile.clear(); thisObject->m_allocationProfileWatchpoint.notifyWrite(); return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); } bool valueCheck; if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { if (!Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor)) thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); } valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), exec->interpreter()->retrieveArgumentsFromVMCode(exec, thisObject)); } else if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { if (!Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor)) thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec), DontDelete | DontEnum | Accessor); return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); } valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), exec->interpreter()->retrieveCallerFromVMCode(exec, thisObject)); } else if (propertyName == exec->propertyNames().length) valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), jsNumber(thisObject->jsExecutable()->parameterCount())); else if (propertyName == exec->propertyNames().name) valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), thisObject->jsExecutable()->nameValue()); else return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException); if (descriptor.configurablePresent() && descriptor.configurable()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to configurable attribute of unconfigurable property."))); return false; } if (descriptor.enumerablePresent() && descriptor.enumerable()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change enumerable attribute of unconfigurable property."))); return false; } if (descriptor.isAccessorDescriptor()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change access mechanism for an unconfigurable property."))); return false; } if (descriptor.writablePresent() && descriptor.writable()) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change writable attribute of unconfigurable property."))); return false; } if (!valueCheck) { if (throwException) throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change value of a readonly property."))); return false; } return true; }
bool JSFunction::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot) { JSFunction* thisObject = jsCast<JSFunction*>(object); if (thisObject->isHostOrBuiltinFunction()) return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (propertyName == exec->propertyNames().prototype) { VM& vm = exec->vm(); unsigned attributes; PropertyOffset offset = thisObject->getDirectOffset(vm, propertyName, attributes); if (!isValidOffset(offset)) { JSObject* prototype = constructEmptyObject(exec); prototype->putDirect(vm, exec->propertyNames().constructor, thisObject, DontEnum); thisObject->putDirect(vm, exec->propertyNames().prototype, prototype, DontDelete | DontEnum); offset = thisObject->getDirectOffset(vm, exec->propertyNames().prototype, attributes); ASSERT(isValidOffset(offset)); } slot.setValue(thisObject, attributes, thisObject->getDirect(offset), offset); } if (propertyName == exec->propertyNames().arguments) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec->vm()), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, ReadOnly | DontEnum | DontDelete, argumentsGetter); return true; } if (propertyName == exec->propertyNames().length) { slot.setCacheableCustom(thisObject, ReadOnly | DontEnum | DontDelete, lengthGetter); return true; } if (propertyName == exec->propertyNames().name) { slot.setCacheableCustom(thisObject, ReadOnly | DontEnum | DontDelete, nameGetter); return true; } if (propertyName == exec->propertyNames().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec->vm()), DontDelete | DontEnum | Accessor); result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); ASSERT(result); } return result; } slot.setCacheableCustom(thisObject, ReadOnly | DontEnum | DontDelete, callerGetter); return true; } return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); }