#include "CallFrame.h"
#include "ExceptionHelpers.h"
#include "FunctionPrototype.h"
+#include "GetterSetter.h"
+#include "JSArray.h"
#include "JSGlobalObject.h"
#include "JSNotAnObject.h"
#include "Interpreter.h"
}
ASSERT_CLASS_FITS_IN_CELL(JSFunction);
+ASSERT_HAS_TRIVIAL_DESTRUCTOR(JSFunction);
-const ClassInfo JSFunction::s_info = { "Function", &Base::s_info, 0, 0 };
+const ClassInfo JSFunction::s_info = { "Function", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSFunction) };
bool JSFunction::isHostFunctionNonInline() const
{
return isHostFunction();
}
-JSFunction::JSFunction(VPtrStealingHackType)
- : Base(VPtrStealingHack)
+JSFunction* JSFunction::create(ExecState* exec, JSGlobalObject* globalObject, int length, const Identifier& name, NativeFunction nativeFunction, Intrinsic intrinsic, NativeFunction nativeConstructor)
{
+ NativeExecutable* executable;
+#if !ENABLE(JIT)
+ UNUSED_PARAM(intrinsic);
+#else
+ if (intrinsic != NoIntrinsic && exec->globalData().canUseJIT()) {
+ ASSERT(nativeConstructor == callHostFunctionAsConstructor);
+ executable = exec->globalData().getHostFunction(nativeFunction, intrinsic);
+ } else
+#endif
+ executable = exec->globalData().getHostFunction(nativeFunction, nativeConstructor);
+
+ JSFunction* function = new (NotNull, allocateCell<JSFunction>(*exec->heap())) JSFunction(exec, globalObject, globalObject->functionStructure());
+ // Can't do this during initialization because getHostFunction might do a GC allocation.
+ function->finishCreation(exec, executable, length, name);
+ return function;
}
-JSFunction::JSFunction(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, int length, const Identifier& name, NativeExecutable* thunk)
- : Base(globalObject, structure)
- , m_executable(exec->globalData(), this, thunk)
- , m_scopeChain(exec->globalData(), this, globalObject->globalScopeChain())
-{
- ASSERT(inherits(&s_info));
- putDirect(exec->globalData(), exec->globalData().propertyNames->name, jsString(exec, name.isNull() ? "" : name.ustring()), DontDelete | ReadOnly | DontEnum);
- putDirect(exec->globalData(), exec->propertyNames().length, jsNumber(length), DontDelete | ReadOnly | DontEnum);
-}
-
-JSFunction::JSFunction(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, int length, const Identifier& name, NativeFunction func)
- : Base(globalObject, structure)
+JSFunction::JSFunction(ExecState* exec, JSGlobalObject* globalObject, Structure* structure)
+ : Base(exec->globalData(), structure)
+ , m_executable()
, m_scopeChain(exec->globalData(), this, globalObject->globalScopeChain())
{
- ASSERT(inherits(&s_info));
-
- // Can't do this during initialization because getHostFunction might do a GC allocation.
- m_executable.set(exec->globalData(), this, exec->globalData().getHostFunction(func));
-
- putDirect(exec->globalData(), exec->globalData().propertyNames->name, jsString(exec, name.isNull() ? "" : name.ustring()), DontDelete | ReadOnly | DontEnum);
- putDirect(exec->globalData(), exec->propertyNames().length, jsNumber(length), DontDelete | ReadOnly | DontEnum);
}
JSFunction::JSFunction(ExecState* exec, FunctionExecutable* executable, ScopeChainNode* scopeChainNode)
- : Base(scopeChainNode->globalObject.get(), scopeChainNode->globalObject->functionStructure())
+ : Base(exec->globalData(), scopeChainNode->globalObject->functionStructure())
, m_executable(exec->globalData(), this, executable)
, m_scopeChain(exec->globalData(), this, scopeChainNode)
{
- ASSERT(inherits(&s_info));
- const Identifier& name = static_cast<FunctionExecutable*>(m_executable.get())->name();
- putDirect(exec->globalData(), exec->globalData().propertyNames->name, jsString(exec, name.isNull() ? "" : name.ustring()), DontDelete | ReadOnly | DontEnum);
}
-JSFunction::~JSFunction()
+void JSFunction::finishCreation(ExecState* exec, NativeExecutable* executable, int length, const Identifier& name)
{
- ASSERT(vptr() == JSGlobalData::jsFunctionVPtr);
+ Base::finishCreation(exec->globalData());
+ ASSERT(inherits(&s_info));
+ m_executable.set(exec->globalData(), this, executable);
+ putDirect(exec->globalData(), exec->globalData().propertyNames->name, jsString(exec, name.isNull() ? "" : name.ustring()), DontDelete | ReadOnly | DontEnum);
+ putDirect(exec->globalData(), exec->propertyNames().length, jsNumber(length), DontDelete | ReadOnly | DontEnum);
}
-static const char* StrictModeCallerAccessError = "Cannot access caller property of a strict mode function";
-static const char* StrictModeArgumentsAccessError = "Cannot access arguments property of a strict mode function";
-
-static void createDescriptorForThrowingProperty(ExecState* exec, PropertyDescriptor& descriptor, const char* message)
+void JSFunction::finishCreation(ExecState* exec, FunctionExecutable* executable, ScopeChainNode* scopeChainNode)
{
- JSValue thrower = createTypeErrorFunction(exec, message);
- descriptor.setAccessorDescriptor(thrower, thrower, DontEnum | DontDelete | Getter | Setter);
+ Base::finishCreation(exec->globalData());
+ ASSERT(inherits(&s_info));
+
+ // Switching the structure here is only safe if we currently have the function structure!
+ ASSERT(structure() == scopeChainNode->globalObject->functionStructure());
+ setStructure(exec->globalData(), scopeChainNode->globalObject->namedFunctionStructure());
+ putDirectOffset(exec->globalData(), scopeChainNode->globalObject->functionNameOffset(), executable->nameValue());
}
const UString& JSFunction::name(ExecState* exec)
{
JSValue displayName = getDirect(exec->globalData(), exec->globalData().propertyNames->displayName);
- if (displayName && isJSString(&exec->globalData(), displayName))
+ if (displayName && isJSString(displayName))
return asString(displayName)->tryGetValue();
return UString();
if (!explicitName.isEmpty())
return explicitName;
- return name(exec);
+ const UString actualName = name(exec);
+ if (!actualName.isEmpty() || isHostFunction())
+ return actualName;
+
+ return jsExecutable()->inferredName().ustring();
+}
+
+const SourceCode* JSFunction::sourceCode() const
+{
+ if (isHostFunction())
+ return 0;
+ return &jsExecutable()->source();
}
-void JSFunction::visitChildren(SlotVisitor& visitor)
+void JSFunction::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
- ASSERT_GC_OBJECT_INHERITS(this, &s_info);
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
- ASSERT(structure()->typeInfo().overridesVisitChildren());
- Base::visitChildren(visitor);
+ ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
+ Base::visitChildren(thisObject, visitor);
- visitor.append(&m_scopeChain);
- if (m_executable)
- visitor.append(&m_executable);
+ visitor.append(&thisObject->m_scopeChain);
+ if (thisObject->m_executable)
+ visitor.append(&thisObject->m_executable);
}
-CallType JSFunction::getCallData(CallData& callData)
+CallType JSFunction::getCallData(JSCell* cell, CallData& callData)
{
- if (isHostFunction()) {
- callData.native.function = nativeFunction();
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ if (thisObject->isHostFunction()) {
+ callData.native.function = thisObject->nativeFunction();
return CallTypeHost;
}
- callData.js.functionExecutable = jsExecutable();
- callData.js.scopeChain = scope();
+ callData.js.functionExecutable = thisObject->jsExecutable();
+ callData.js.scopeChain = thisObject->scope();
return CallTypeJS;
}
JSValue JSFunction::argumentsGetter(ExecState* exec, JSValue slotBase, const Identifier&)
{
- JSFunction* thisObj = asFunction(slotBase);
+ JSFunction* thisObj = jsCast<JSFunction*>(slotBase);
ASSERT(!thisObj->isHostFunction());
- return exec->interpreter()->retrieveArguments(exec, thisObj);
+ return exec->interpreter()->retrieveArgumentsFromVMCode(exec, thisObj);
}
JSValue JSFunction::callerGetter(ExecState* exec, JSValue slotBase, const Identifier&)
{
- JSFunction* thisObj = asFunction(slotBase);
+ JSFunction* thisObj = jsCast<JSFunction*>(slotBase);
ASSERT(!thisObj->isHostFunction());
- return exec->interpreter()->retrieveCaller(exec, thisObj);
+ JSValue caller = exec->interpreter()->retrieveCallerFromVMCode(exec, thisObj);
+
+ // See ES5.1 15.3.5.4 - Function.caller may not be used to retrieve a strict caller.
+ if (!caller.isObject() || !asObject(caller)->inherits(&JSFunction::s_info))
+ return caller;
+ JSFunction* function = jsCast<JSFunction*>(caller);
+ if (function->isHostFunction() || !function->jsExecutable()->isStrictMode())
+ return caller;
+ return throwTypeError(exec, "Function.caller used to retrieve strict caller");
}
JSValue JSFunction::lengthGetter(ExecState*, JSValue slotBase, const Identifier&)
{
- JSFunction* thisObj = asFunction(slotBase);
+ JSFunction* thisObj = jsCast<JSFunction*>(slotBase);
ASSERT(!thisObj->isHostFunction());
return jsNumber(thisObj->jsExecutable()->parameterCount());
}
-static inline WriteBarrierBase<Unknown>* createPrototypeProperty(JSGlobalData& globalData, JSGlobalObject* globalObject, JSFunction* function)
+bool JSFunction::getOwnPropertySlot(JSCell* cell, ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
- ASSERT(!function->isHostFunction());
-
- ExecState* exec = globalObject->globalExec();
- if (WriteBarrierBase<Unknown>* location = function->getDirectLocation(globalData, exec->propertyNames().prototype))
- return location;
- JSObject* prototype = constructEmptyObject(exec, globalObject->emptyObjectStructure());
- prototype->putDirect(globalData, exec->propertyNames().constructor, function, DontEnum);
- function->putDirect(globalData, exec->propertyNames().prototype, prototype, DontDelete | DontEnum);
- return function->getDirectLocation(exec->globalData(), exec->propertyNames().prototype);
-}
-
-void JSFunction::preventExtensions(JSGlobalData& globalData)
-{
- if (!isHostFunction())
- createPrototypeProperty(globalData, scope()->globalObject.get(), this);
- JSObject::preventExtensions(globalData);
-}
-
-bool JSFunction::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
-{
- if (isHostFunction())
- return Base::getOwnPropertySlot(exec, propertyName, slot);
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ if (thisObject->isHostFunction())
+ return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot);
if (propertyName == exec->propertyNames().prototype) {
- WriteBarrierBase<Unknown>* location = getDirectLocation(exec->globalData(), propertyName);
+ WriteBarrierBase<Unknown>* location = thisObject->getDirectLocation(exec->globalData(), propertyName);
- if (!location)
- location = createPrototypeProperty(exec->globalData(), scope()->globalObject.get(), this);
+ 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(this, location->get(), offsetForLocation(location));
+ slot.setValue(thisObject, location->get(), thisObject->offsetForLocation(location));
}
if (propertyName == exec->propertyNames().arguments) {
- if (jsExecutable()->isStrictMode()) {
- throwTypeError(exec, "Can't access arguments object of a strict mode function");
- slot.setValue(jsNull());
- return true;
+ 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(this, argumentsGetter);
+ slot.setCacheableCustom(thisObject, argumentsGetter);
return true;
}
if (propertyName == exec->propertyNames().length) {
- slot.setCacheableCustom(this, lengthGetter);
+ slot.setCacheableCustom(thisObject, lengthGetter);
return true;
}
if (propertyName == exec->propertyNames().caller) {
- if (jsExecutable()->isStrictMode()) {
- throwTypeError(exec, StrictModeCallerAccessError);
- slot.setValue(jsNull());
- return true;
+ 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(this, callerGetter);
+ slot.setCacheableCustom(thisObject, callerGetter);
return true;
}
- return Base::getOwnPropertySlot(exec, propertyName, slot);
+ return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
-bool JSFunction::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
+bool JSFunction::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
{
- if (isHostFunction())
- return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
+ JSFunction* thisObject = jsCast<JSFunction*>(object);
+ if (thisObject->isHostFunction())
+ return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor);
if (propertyName == exec->propertyNames().prototype) {
PropertySlot slot;
- getOwnPropertySlot(exec, propertyName, slot);
- return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
+ thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot);
+ return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor);
}
if (propertyName == exec->propertyNames().arguments) {
- if (jsExecutable()->isStrictMode())
- createDescriptorForThrowingProperty(exec, descriptor, StrictModeArgumentsAccessError);
- else
- descriptor.setDescriptor(exec->interpreter()->retrieveArguments(exec, this), ReadOnly | DontEnum | DontDelete);
+ if (thisObject->jsExecutable()->isStrictMode()) {
+ bool result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor);
+ if (!result) {
+ thisObject->putDirectAccessor(exec->globalData(), 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(jsExecutable()->parameterCount()), ReadOnly | DontEnum | DontDelete);
+ descriptor.setDescriptor(jsNumber(thisObject->jsExecutable()->parameterCount()), ReadOnly | DontEnum | DontDelete);
return true;
}
if (propertyName == exec->propertyNames().caller) {
- if (jsExecutable()->isStrictMode())
- createDescriptorForThrowingProperty(exec, descriptor, StrictModeCallerAccessError);
- else
- descriptor.setDescriptor(exec->interpreter()->retrieveCaller(exec, this), ReadOnly | DontEnum | DontDelete);
+ if (thisObject->jsExecutable()->isStrictMode()) {
+ bool result = Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor);
+ if (!result) {
+ thisObject->putDirectAccessor(exec->globalData(), 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(exec, propertyName, descriptor);
+ return Base::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor);
}
-void JSFunction::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
+void JSFunction::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
- if (!isHostFunction() && (mode == IncludeDontEnumProperties)) {
+ JSFunction* thisObject = jsCast<JSFunction*>(object);
+ if (!thisObject->isHostFunction() && (mode == IncludeDontEnumProperties)) {
// Make sure prototype has been reified.
PropertySlot slot;
- getOwnPropertySlot(exec, exec->propertyNames().prototype, slot);
+ thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, exec->propertyNames().prototype, slot);
propertyNames.add(exec->propertyNames().arguments);
- propertyNames.add(exec->propertyNames().callee);
propertyNames.add(exec->propertyNames().caller);
propertyNames.add(exec->propertyNames().length);
}
- Base::getOwnPropertyNames(exec, propertyNames, mode);
+ Base::getOwnPropertyNames(thisObject, exec, propertyNames, mode);
}
-void JSFunction::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
+void JSFunction::put(JSCell* cell, ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
- if (isHostFunction()) {
- Base::put(exec, propertyName, value, slot);
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ if (thisObject->isHostFunction()) {
+ Base::put(thisObject, exec, propertyName, value, slot);
return;
}
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;
- getOwnPropertySlot(exec, propertyName, slot);
+ thisObject->methodTable()->getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
- if (jsExecutable()->isStrictMode()) {
- if (propertyName == exec->propertyNames().arguments) {
- throwTypeError(exec, StrictModeArgumentsAccessError);
- return;
- }
- if (propertyName == exec->propertyNames().caller) {
- throwTypeError(exec, StrictModeCallerAccessError);
- return;
- }
+ if (thisObject->jsExecutable()->isStrictMode() && (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().caller)) {
+ // This will trigger the property to be reified, if this is not already the case!
+ bool okay = thisObject->hasProperty(exec, propertyName);
+ ASSERT_UNUSED(okay, okay);
+ Base::put(thisObject, exec, propertyName, value, slot);
+ return;
}
- if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length)
+ if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length || propertyName == exec->propertyNames().caller) {
+ if (slot.isStrictMode())
+ throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
return;
- Base::put(exec, propertyName, value, slot);
+ }
+ Base::put(thisObject, exec, propertyName, value, slot);
}
-bool JSFunction::deleteProperty(ExecState* exec, const Identifier& propertyName)
+bool JSFunction::deleteProperty(JSCell* cell, ExecState* exec, const Identifier& propertyName)
{
- if (isHostFunction())
- return Base::deleteProperty(exec, propertyName);
- if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length)
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ // For non-host functions, don't let these properties by deleted - except by DefineOwnProperty.
+ if (!thisObject->isHostFunction() && !exec->globalData().isInDefineOwnProperty()
+ && (propertyName == exec->propertyNames().arguments
+ || propertyName == exec->propertyNames().length
+ || propertyName == exec->propertyNames().prototype
+ || propertyName == exec->propertyNames().caller))
+ return false;
+ return Base::deleteProperty(thisObject, exec, propertyName);
+}
+
+bool JSFunction::defineOwnProperty(JSObject* object, ExecState* exec, const Identifier& 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);
+ 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->globalData(), 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->globalData(), 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
+ return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException);
+
+ if (descriptor.configurablePresent() && descriptor.configurable()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to configurable attribute of unconfigurable property."));
+ return false;
+ }
+ if (descriptor.enumerablePresent() && descriptor.enumerable()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change enumerable attribute of unconfigurable property."));
+ return false;
+ }
+ if (descriptor.isAccessorDescriptor()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change access mechanism for an unconfigurable property."));
+ return false;
+ }
+ if (descriptor.writablePresent() && descriptor.writable()) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change writable attribute of unconfigurable property."));
return false;
- return Base::deleteProperty(exec, propertyName);
+ }
+ if (!valueCheck) {
+ if (throwException)
+ throwError(exec, createTypeError(exec, "Attempting to change value of a readonly property."));
+ return false;
+ }
+ return true;
}
// ECMA 13.2.2 [[Construct]]
-ConstructType JSFunction::getConstructData(ConstructData& constructData)
+ConstructType JSFunction::getConstructData(JSCell* cell, ConstructData& constructData)
{
- if (isHostFunction())
- return ConstructTypeNone;
- constructData.js.functionExecutable = jsExecutable();
- constructData.js.scopeChain = scope();
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ if (thisObject->isHostFunction()) {
+ constructData.native.function = thisObject->nativeConstructor();
+ return ConstructTypeHost;
+ }
+ constructData.js.functionExecutable = thisObject->jsExecutable();
+ constructData.js.scopeChain = thisObject->scope();
return ConstructTypeJS;
}
+
+
+UString getCalculatedDisplayName(CallFrame* callFrame, JSObject* object)
+{
+ if (JSFunction* function = jsDynamicCast<JSFunction*>(object))
+ return function->calculatedDisplayName(callFrame);
+ if (InternalFunction* function = jsDynamicCast<InternalFunction*>(object))
+ return function->calculatedDisplayName(callFrame);
+ return callFrame->globalData().propertyNames->emptyIdentifier.ustring();
+}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff