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 = jsCast<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); thisObject->putDirect(exec->globalData(), exec->propertyNames().prototype, prototype, DontDelete | DontEnum); 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->putDirectAccessor(exec->globalData(), 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().caller) { if (thisObject->jsExecutable()->isStrictMode()) { bool result = Base::getOwnPropertySlot(thisObject, exec, propertyName, slot); if (!result) { thisObject->putDirectAccessor(exec->globalData(), 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::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); }
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); }