#include "config.h"
#include "JSFunction.h"
+#include "Arguments.h"
#include "CodeBlock.h"
#include "CommonIdentifiers.h"
#include "CallFrame.h"
+#include "ExceptionHelpers.h"
#include "FunctionPrototype.h"
+#include "GetterSetter.h"
+#include "JSArray.h"
+#include "JSBoundFunction.h"
+#include "JSFunctionInlines.h"
#include "JSGlobalObject.h"
+#include "JSNameScope.h"
+#include "JSNotAnObject.h"
#include "Interpreter.h"
+#include "ObjectConstructor.h"
#include "ObjectPrototype.h"
+#include "JSCInlines.h"
#include "Parser.h"
#include "PropertyNameArray.h"
-#include "ScopeChainMark.h"
-
-using namespace WTF;
-using namespace Unicode;
+#include "StackVisitor.h"
namespace JSC {
-ASSERT_CLASS_FITS_IN_CELL(JSFunction);
+EncodedJSValue JSC_HOST_CALL callHostFunctionAsConstructor(ExecState* exec)
+{
+ return throwVMError(exec, createNotAConstructorError(exec, exec->callee()));
+}
-const ClassInfo JSFunction::info = { "Function", &InternalFunction::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(NonNullPassRefPtr<Structure> structure)
- : Base(structure)
- , m_executable(adoptRef(new VPtrHackExecutable()))
+JSFunction* JSFunction::create(VM& vm, JSGlobalObject* globalObject, int length, const String& name, NativeFunction nativeFunction, Intrinsic intrinsic, NativeFunction nativeConstructor)
{
+ NativeExecutable* executable;
+#if !ENABLE(JIT)
+ UNUSED_PARAM(intrinsic);
+#else
+ if (intrinsic != NoIntrinsic && vm.canUseJIT()) {
+ ASSERT(nativeConstructor == callHostFunctionAsConstructor);
+ executable = vm.getHostFunction(nativeFunction, intrinsic);
+ } else
+#endif
+ executable = vm.getHostFunction(nativeFunction, nativeConstructor);
+
+ JSFunction* function = new (NotNull, allocateCell<JSFunction>(vm.heap)) JSFunction(vm, globalObject, globalObject->functionStructure());
+ // Can't do this during initialization because getHostFunction might do a GC allocation.
+ function->finishCreation(vm, executable, length, name);
+ return function;
}
-JSFunction::JSFunction(ExecState* exec, NonNullPassRefPtr<Structure> structure, int length, const Identifier& name, NativeFunction func)
- : Base(&exec->globalData(), structure, name)
-#if ENABLE(JIT)
- , m_executable(adoptRef(new NativeExecutable(exec)))
-#endif
+void JSFunction::destroy(JSCell* cell)
{
-#if ENABLE(JIT)
- setNativeFunction(func);
- putDirect(exec->propertyNames().length, jsNumber(exec, length), DontDelete | ReadOnly | DontEnum);
-#else
- UNUSED_PARAM(length);
- UNUSED_PARAM(func);
- ASSERT_NOT_REACHED();
-#endif
+ static_cast<JSFunction*>(cell)->JSFunction::~JSFunction();
}
-JSFunction::JSFunction(ExecState* exec, NonNullPassRefPtr<FunctionExecutable> executable, ScopeChainNode* scopeChainNode)
- : Base(&exec->globalData(), exec->lexicalGlobalObject()->functionStructure(), executable->name())
- , m_executable(executable)
+JSFunction::JSFunction(VM& vm, JSGlobalObject* globalObject, Structure* structure)
+ : Base(vm, structure)
+ , m_executable()
+ , m_scope(vm, this, globalObject)
+ // We initialize blind so that changes to the prototype after function creation but before
+ // the optimizer kicks in don't disable optimizations. Once the optimizer kicks in, the
+ // watchpoint will start watching and any changes will both force deoptimization and disable
+ // future attempts to optimize. This is necessary because we are guaranteed that the
+ // allocation profile is changed exactly once prior to optimizations kicking in. We could be
+ // smarter and count the number of times the prototype is clobbered and only optimize if it
+ // was clobbered exactly once, but that seems like overkill. In almost all cases it will be
+ // clobbered once, and if it's clobbered more than once, that will probably only occur
+ // before we started optimizing, anyway.
+ , m_allocationProfileWatchpoint(ClearWatchpoint)
{
- setScopeChain(scopeChainNode);
}
-JSFunction::~JSFunction()
+void JSFunction::finishCreation(VM& vm, NativeExecutable* executable, int length, const String& name)
{
- ASSERT(vptr() == JSGlobalData::jsFunctionVPtr);
-
- // JIT code for other functions may have had calls linked directly to the code for this function; these links
- // are based on a check for the this pointer value for this JSFunction - which will no longer be valid once
- // this memory is freed and may be reused (potentially for another, different JSFunction).
- if (!isHostFunction()) {
-#if ENABLE(JIT_OPTIMIZE_CALL)
- ASSERT(m_executable);
- if (jsExecutable()->isGenerated())
- jsExecutable()->generatedBytecode().unlinkCallers();
-#endif
- scopeChain().~ScopeChain(); // FIXME: Don't we need to do this in the interpreter too?
- }
+ Base::finishCreation(vm);
+ ASSERT(inherits(info()));
+ m_executable.set(vm, this, executable);
+ putDirect(vm, vm.propertyNames->name, jsString(&vm, name), DontDelete | ReadOnly | DontEnum);
+ putDirect(vm, vm.propertyNames->length, jsNumber(length), DontDelete | ReadOnly | DontEnum);
}
-void JSFunction::markChildren(MarkStack& markStack)
+void JSFunction::addNameScopeIfNeeded(VM& vm)
{
- Base::markChildren(markStack);
- if (!isHostFunction()) {
- jsExecutable()->markAggregate(markStack);
- scopeChain().markAggregate(markStack);
- }
+ FunctionExecutable* executable = jsCast<FunctionExecutable*>(m_executable.get());
+ if (!functionNameIsInScope(executable->name(), executable->functionMode()))
+ return;
+ if (!functionNameScopeIsDynamic(executable->usesEval(), executable->isStrictMode()))
+ return;
+ m_scope.set(vm, this, JSNameScope::create(vm, m_scope->globalObject(), executable->name(), this, ReadOnly | DontDelete, m_scope.get()));
}
-CallType JSFunction::getCallData(CallData& callData)
+JSFunction* JSFunction::createBuiltinFunction(VM& vm, FunctionExecutable* executable, JSGlobalObject* globalObject)
{
- if (isHostFunction()) {
- callData.native.function = nativeFunction();
+ JSFunction* function = create(vm, executable, globalObject);
+ function->putDirect(vm, vm.propertyNames->name, jsString(&vm, executable->name().string()), DontDelete | ReadOnly | DontEnum);
+ function->putDirect(vm, vm.propertyNames->length, jsNumber(executable->parameterCount()), DontDelete | ReadOnly | DontEnum);
+ return function;
+}
+
+ObjectAllocationProfile* JSFunction::createAllocationProfile(ExecState* exec, size_t inlineCapacity)
+{
+ VM& vm = exec->vm();
+ JSObject* prototype = jsDynamicCast<JSObject*>(get(exec, vm.propertyNames->prototype));
+ if (!prototype)
+ prototype = globalObject()->objectPrototype();
+ m_allocationProfile.initialize(globalObject()->vm(), this, prototype, inlineCapacity);
+ return &m_allocationProfile;
+}
+
+String JSFunction::name(ExecState* exec)
+{
+ return get(exec, exec->vm().propertyNames->name).toWTFString(exec);
+}
+
+String JSFunction::displayName(ExecState* exec)
+{
+ JSValue displayName = getDirect(exec->vm(), exec->vm().propertyNames->displayName);
+
+ if (displayName && isJSString(displayName))
+ return asString(displayName)->tryGetValue();
+
+ return String();
+}
+
+const String JSFunction::calculatedDisplayName(ExecState* exec)
+{
+ const String explicitName = displayName(exec);
+
+ if (!explicitName.isEmpty())
+ return explicitName;
+
+ const String actualName = name(exec);
+ if (!actualName.isEmpty() || isHostOrBuiltinFunction())
+ return actualName;
+
+ return jsExecutable()->inferredName().string();
+}
+
+const SourceCode* JSFunction::sourceCode() const
+{
+ if (isHostOrBuiltinFunction())
+ return 0;
+ return &jsExecutable()->source();
+}
+
+void JSFunction::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ ASSERT_GC_OBJECT_INHERITS(thisObject, info());
+ COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
+ ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
+ Base::visitChildren(thisObject, visitor);
+
+ visitor.append(&thisObject->m_scope);
+ visitor.append(&thisObject->m_executable);
+ thisObject->m_allocationProfile.visitAggregate(visitor);
+}
+
+CallType JSFunction::getCallData(JSCell* cell, CallData& callData)
+{
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ if (thisObject->isHostFunction()) {
+ callData.native.function = thisObject->nativeFunction();
return CallTypeHost;
}
- callData.js.functionExecutable = jsExecutable();
- callData.js.scopeChain = scopeChain().node();
+ callData.js.functionExecutable = thisObject->jsExecutable();
+ callData.js.scope = thisObject->scope();
return CallTypeJS;
}
-JSValue JSFunction::call(ExecState* exec, JSValue thisValue, const ArgList& args)
+class RetrieveArgumentsFunctor {
+public:
+ RetrieveArgumentsFunctor(JSFunction* functionObj)
+ : m_targetCallee(jsDynamicCast<JSObject*>(functionObj))
+ , m_result(jsNull())
+ {
+ }
+
+ JSValue result() const { return m_result; }
+
+ StackVisitor::Status operator()(StackVisitor& visitor)
+ {
+ JSObject* callee = visitor->callee();
+ if (callee != m_targetCallee)
+ return StackVisitor::Continue;
+
+ m_result = JSValue(visitor->createArguments());
+ return StackVisitor::Done;
+ }
+
+private:
+ JSObject* m_targetCallee;
+ JSValue m_result;
+};
+
+static JSValue retrieveArguments(ExecState* exec, JSFunction* functionObj)
{
- ASSERT(!isHostFunction());
- return exec->interpreter()->execute(jsExecutable(), exec, this, thisValue.toThisObject(exec), args, scopeChain().node(), exec->exceptionSlot());
+ RetrieveArgumentsFunctor functor(functionObj);
+ exec->iterate(functor);
+ return functor.result();
}
-JSValue JSFunction::argumentsGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
+EncodedJSValue JSFunction::argumentsGetter(ExecState* exec, JSObject* slotBase, EncodedJSValue, PropertyName)
{
- JSFunction* thisObj = asFunction(slot.slotBase());
+ JSFunction* thisObj = jsCast<JSFunction*>(slotBase);
ASSERT(!thisObj->isHostFunction());
- return exec->interpreter()->retrieveArguments(exec, thisObj);
+
+ return JSValue::encode(retrieveArguments(exec, thisObj));
}
-JSValue JSFunction::callerGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
+class RetrieveCallerFunctionFunctor {
+public:
+ RetrieveCallerFunctionFunctor(JSFunction* functionObj)
+ : m_targetCallee(jsDynamicCast<JSObject*>(functionObj))
+ , m_hasFoundFrame(false)
+ , m_hasSkippedToCallerFrame(false)
+ , m_result(jsNull())
+ {
+ }
+
+ JSValue result() const { return m_result; }
+
+ StackVisitor::Status operator()(StackVisitor& visitor)
+ {
+ JSObject* callee = visitor->callee();
+
+ if (callee && callee->inherits(JSBoundFunction::info()))
+ return StackVisitor::Continue;
+
+ if (!m_hasFoundFrame && (callee != m_targetCallee))
+ return StackVisitor::Continue;
+
+ m_hasFoundFrame = true;
+ if (!m_hasSkippedToCallerFrame) {
+ m_hasSkippedToCallerFrame = true;
+ return StackVisitor::Continue;
+ }
+
+ if (callee)
+ m_result = callee;
+ return StackVisitor::Done;
+ }
+
+private:
+ JSObject* m_targetCallee;
+ bool m_hasFoundFrame;
+ bool m_hasSkippedToCallerFrame;
+ JSValue m_result;
+};
+
+static JSValue retrieveCallerFunction(ExecState* exec, JSFunction* functionObj)
+{
+ RetrieveCallerFunctionFunctor functor(functionObj);
+ exec->iterate(functor);
+ return functor.result();
+}
+
+EncodedJSValue JSFunction::callerGetter(ExecState* exec, JSObject* slotBase, EncodedJSValue, PropertyName)
{
- JSFunction* thisObj = asFunction(slot.slotBase());
+ JSFunction* thisObj = jsCast<JSFunction*>(slotBase);
ASSERT(!thisObj->isHostFunction());
- return exec->interpreter()->retrieveCaller(exec, thisObj);
+ JSValue caller = retrieveCallerFunction(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::info()))
+ return JSValue::encode(caller);
+ JSFunction* function = jsCast<JSFunction*>(caller);
+ if (function->isHostOrBuiltinFunction() || !function->jsExecutable()->isStrictMode())
+ return JSValue::encode(caller);
+ return JSValue::encode(throwTypeError(exec, ASCIILiteral("Function.caller used to retrieve strict caller")));
}
-JSValue JSFunction::lengthGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
+EncodedJSValue JSFunction::lengthGetter(ExecState*, JSObject* slotBase, EncodedJSValue, PropertyName)
{
- JSFunction* thisObj = asFunction(slot.slotBase());
+ JSFunction* thisObj = jsCast<JSFunction*>(slotBase);
ASSERT(!thisObj->isHostFunction());
- return jsNumber(exec, thisObj->jsExecutable()->parameterCount());
+ return JSValue::encode(jsNumber(thisObj->jsExecutable()->parameterCount()));
}
-bool JSFunction::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
+EncodedJSValue JSFunction::nameGetter(ExecState*, JSObject* slotBase, EncodedJSValue, PropertyName)
{
- if (isHostFunction())
- return Base::getOwnPropertySlot(exec, propertyName, slot);
+ JSFunction* thisObj = jsCast<JSFunction*>(slotBase);
+ ASSERT(!thisObj->isHostFunction());
+ return JSValue::encode(thisObj->jsExecutable()->nameValue());
+}
- if (propertyName == exec->propertyNames().prototype) {
- JSValue* location = getDirectLocation(propertyName);
+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 (!location) {
- JSObject* prototype = new (exec) JSObject(scopeChain().globalObject()->emptyObjectStructure());
- prototype->putDirect(exec->propertyNames().constructor, this, DontEnum);
- putDirect(exec->propertyNames().prototype, prototype, DontDelete);
- location = getDirectLocation(propertyName);
+ 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.setValueSlot(this, location, offsetForLocation(location));
+ slot.setValue(thisObject, attributes, thisObject->getDirect(offset), offset);
}
if (propertyName == exec->propertyNames().arguments) {
- slot.setCustom(this, argumentsGetter);
+ 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.setCustom(this, lengthGetter);
+ 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) {
- slot.setCustom(this, callerGetter);
+ 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(exec, propertyName, slot);
+ return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
- bool JSFunction::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
- {
- if (isHostFunction())
- return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
-
- if (propertyName == exec->propertyNames().prototype) {
- PropertySlot slot;
- getOwnPropertySlot(exec, propertyName, slot);
- return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
- }
-
- if (propertyName == exec->propertyNames().arguments) {
- descriptor.setDescriptor(exec->interpreter()->retrieveArguments(exec, this), ReadOnly | DontEnum | DontDelete);
- return true;
- }
-
- if (propertyName == exec->propertyNames().length) {
- descriptor.setDescriptor(jsNumber(exec, jsExecutable()->parameterCount()), ReadOnly | DontEnum | DontDelete);
- return true;
- }
-
- if (propertyName == exec->propertyNames().caller) {
- descriptor.setDescriptor(exec->interpreter()->retrieveCaller(exec, this), ReadOnly | DontEnum | DontDelete);
- return true;
- }
-
- return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
- }
-
-void JSFunction::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
+void JSFunction::getOwnNonIndexPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
- if (!isHostFunction() && (mode == IncludeDontEnumProperties)) {
- propertyNames.add(exec->propertyNames().arguments);
- propertyNames.add(exec->propertyNames().callee);
- propertyNames.add(exec->propertyNames().caller);
- propertyNames.add(exec->propertyNames().length);
+ JSFunction* thisObject = jsCast<JSFunction*>(object);
+ if (!thisObject->isHostOrBuiltinFunction() && (mode == IncludeDontEnumProperties)) {
+ VM& vm = exec->vm();
+ // Make sure prototype has been reified.
+ PropertySlot slot(thisObject);
+ thisObject->methodTable(vm)->getOwnPropertySlot(thisObject, exec, vm.propertyNames->prototype, slot);
+
+ propertyNames.add(vm.propertyNames->arguments);
+ propertyNames.add(vm.propertyNames->caller);
+ propertyNames.add(vm.propertyNames->length);
+ propertyNames.add(vm.propertyNames->name);
}
- Base::getOwnPropertyNames(exec, propertyNames, mode);
+ Base::getOwnNonIndexPropertyNames(thisObject, exec, propertyNames, mode);
}
-void JSFunction::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
+void JSFunction::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
- if (isHostFunction()) {
- Base::put(exec, propertyName, value, slot);
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ if (thisObject->isHostOrBuiltinFunction()) {
+ 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(thisObject);
+ thisObject->methodTable(exec->vm())->getOwnPropertySlot(thisObject, exec, propertyName, slot);
+ thisObject->m_allocationProfile.clear();
+ thisObject->m_allocationProfileWatchpoint.fireAll();
+ // Don't allow this to be cached, since a [[Put]] must clear m_allocationProfile.
+ PutPropertySlot dontCache(thisObject);
+ Base::put(thisObject, exec, propertyName, value, dontCache);
+ 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().name || 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(JSCell* cell, ExecState* exec, PropertyName propertyName)
+{
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ // For non-host functions, don't let these properties by deleted - except by DefineOwnProperty.
+ if (!thisObject->isHostOrBuiltinFunction() && !exec->vm().isInDefineOwnProperty()
+ && (propertyName == exec->propertyNames().arguments
+ || propertyName == exec->propertyNames().length
+ || propertyName == exec->propertyNames().name
+ || propertyName == exec->propertyNames().prototype
+ || propertyName == exec->propertyNames().caller))
+ return false;
+ return Base::deleteProperty(thisObject, exec, propertyName);
}
-bool JSFunction::deleteProperty(ExecState* exec, const Identifier& propertyName)
+bool JSFunction::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName propertyName, const PropertyDescriptor& descriptor, bool throwException)
{
- if (isHostFunction())
- return Base::deleteProperty(exec, propertyName);
- if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length)
+ JSFunction* thisObject = jsCast<JSFunction*>(object);
+ if (thisObject->isHostOrBuiltinFunction())
+ 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);
+ thisObject->methodTable(exec->vm())->getOwnPropertySlot(thisObject, exec, propertyName, slot);
+ thisObject->m_allocationProfile.clear();
+ thisObject->m_allocationProfileWatchpoint.fireAll();
+ return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException);
+ }
+
+ bool valueCheck;
+ if (propertyName == exec->propertyNames().arguments) {
+ if (thisObject->jsExecutable()->isStrictMode()) {
+ PropertySlot slot(thisObject);
+ if (!Base::getOwnPropertySlot(thisObject, exec, propertyName, slot))
+ thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec->vm()), DontDelete | DontEnum | Accessor);
+ return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException);
+ }
+ valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), retrieveArguments(exec, thisObject));
+ } else if (propertyName == exec->propertyNames().caller) {
+ if (thisObject->jsExecutable()->isStrictMode()) {
+ PropertySlot slot(thisObject);
+ if (!Base::getOwnPropertySlot(thisObject, exec, propertyName, slot))
+ thisObject->putDirectAccessor(exec, propertyName, thisObject->globalObject()->throwTypeErrorGetterSetter(exec->vm()), DontDelete | DontEnum | Accessor);
+ return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException);
+ }
+ valueCheck = !descriptor.value() || sameValue(exec, descriptor.value(), retrieveCallerFunction(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)
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Attempting to configurable attribute of unconfigurable property.")));
+ return false;
+ }
+ if (descriptor.enumerablePresent() && descriptor.enumerable()) {
+ if (throwException)
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Attempting to change enumerable attribute of unconfigurable property.")));
+ return false;
+ }
+ if (descriptor.isAccessorDescriptor()) {
+ if (throwException)
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Attempting to change access mechanism for an unconfigurable property.")));
+ return false;
+ }
+ if (descriptor.writablePresent() && descriptor.writable()) {
+ if (throwException)
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Attempting to change writable attribute of unconfigurable property.")));
+ return false;
+ }
+ if (!valueCheck) {
+ if (throwException)
+ exec->vm().throwException(exec, createTypeError(exec, ASCIILiteral("Attempting to change value of a readonly property.")));
return false;
- return Base::deleteProperty(exec, propertyName);
+ }
+ 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 = scopeChain().node();
+ JSFunction* thisObject = jsCast<JSFunction*>(cell);
+ if (thisObject->isHostFunction()) {
+ constructData.native.function = thisObject->nativeConstructor();
+ return ConstructTypeHost;
+ }
+ constructData.js.functionExecutable = thisObject->jsExecutable();
+ constructData.js.scope = thisObject->scope();
return ConstructTypeJS;
}
-JSObject* JSFunction::construct(ExecState* exec, const ArgList& args)
+String getCalculatedDisplayName(CallFrame* callFrame, JSObject* object)
{
- ASSERT(!isHostFunction());
- Structure* structure;
- JSValue prototype = get(exec, exec->propertyNames().prototype);
- if (prototype.isObject())
- structure = asObject(prototype)->inheritorID();
- else
- structure = exec->lexicalGlobalObject()->emptyObjectStructure();
- JSObject* thisObj = new (exec) JSObject(structure);
-
- JSValue result = exec->interpreter()->execute(jsExecutable(), exec, this, thisObj, args, scopeChain().node(), exec->exceptionSlot());
- if (exec->hadException() || !result.isObject())
- return thisObj;
- return asObject(result);
+ if (JSFunction* function = jsDynamicCast<JSFunction*>(object))
+ return function->calculatedDisplayName(callFrame);
+ if (InternalFunction* function = jsDynamicCast<InternalFunction*>(object))
+ return function->calculatedDisplayName(callFrame);
+ return "";
}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff