JSValue* JSActivation::argumentsGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
JSActivation* thisObj = static_cast<JSActivation*>(slot.slotBase());
if (!thisObj->d()->argumentsObject)
thisObj->d()->argumentsObject = thisObj->createArgumentsObject(exec);
return thisObj->d()->argumentsObject;
}
JSValue JSActivation::argumentsGetter(ExecState*, JSValue slotBase, const Identifier&)
{
JSActivation* activation = asActivation(slotBase);
CallFrame* callFrame = CallFrame::create(activation->d()->registers);
int argumentsRegister = activation->d()->functionExecutable->generatedBytecode().argumentsRegister();
if (!callFrame->uncheckedR(argumentsRegister).jsValue()) {
JSValue arguments = JSValue(new (callFrame) Arguments(callFrame));
callFrame->uncheckedR(argumentsRegister) = arguments;
callFrame->uncheckedR(unmodifiedArgumentsRegister(argumentsRegister)) = arguments;
}
ASSERT(callFrame->uncheckedR(argumentsRegister).jsValue().inherits(&Arguments::info));
return callFrame->uncheckedR(argumentsRegister).jsValue();
}
void JSActivation::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
JSActivation* thisObject = jsCast<JSActivation*>(cell);
ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
if (thisObject->symbolTablePut(exec, propertyName, value, slot.isStrictMode()))
return;
// We don't call through to JSObject because __proto__ and getter/setter
// properties are non-standard extensions that other implementations do not
// expose in the activation object.
ASSERT(!thisObject->hasGetterSetterProperties());
thisObject->putOwnDataProperty(exec->vm(), propertyName, value, slot);
}
void JSActivation::put(JSCell* cell, ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
{
JSActivation* thisObject = static_cast<JSActivation*>(cell);
ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
if (thisObject->symbolTablePut(exec->globalData(), propertyName, value))
return;
// We don't call through to JSObject because __proto__ and getter/setter
// properties are non-standard extensions that other implementations do not
// expose in the activation object.
ASSERT(!thisObject->hasGetterSetterProperties());
thisObject->putDirect(exec->globalData(), propertyName, value, 0, true, slot);
}
// FIXME: Make this function honor ReadOnly (const) and DontEnum
void JSActivation::putDirectVirtual(JSObject* object, ExecState* exec, PropertyName propertyName, JSValue value, unsigned attributes)
{
JSActivation* thisObject = jsCast<JSActivation*>(object);
ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
if (thisObject->symbolTablePutWithAttributes(exec->globalData(), propertyName, value, attributes))
return;
// We don't call through to JSObject because __proto__ and getter/setter
// properties are non-standard extensions that other implementations do not
// expose in the activation object.
ASSERT(!thisObject->hasGetterSetterProperties());
JSObject::putDirectVirtual(thisObject, exec, propertyName, value, attributes);
}
void JSActivation::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
JSActivation* thisObject = jsCast<JSActivation*>(object);
SymbolTable::const_iterator end = thisObject->symbolTable().end();
for (SymbolTable::const_iterator it = thisObject->symbolTable().begin(); it != end; ++it) {
if (it->second.getAttributes() & DontEnum && mode != IncludeDontEnumProperties)
continue;
if (it->second.getIndex() >= thisObject->m_numCapturedVars)
continue;
propertyNames.add(Identifier(exec, it->first.get()));
}
// Skip the JSVariableObject implementation of getOwnPropertyNames
JSObject::getOwnPropertyNames(thisObject, exec, propertyNames, mode);
}
void JSActivation::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
JSActivation* thisObject = jsCast<JSActivation*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
Base::visitChildren(thisObject, visitor);
// No need to mark our registers if they're still in the JSStack.
if (!thisObject->isTornOff())
return;
for (int i = 0; i < thisObject->symbolTable()->captureCount(); ++i)
visitor.append(&thisObject->storage()[i]);
}
bool JSActivation::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
{
JSActivation* thisObject = jsCast<JSActivation*>(object);
if (propertyName == exec->propertyNames().arguments) {
// Defend against the inspector asking for the arguments object after it has been optimized out.
if (!thisObject->isTornOff()) {
slot.setCustom(thisObject, DontEnum, thisObject->getArgumentsGetter());
return true;
}
}
if (thisObject->symbolTableGet(propertyName, slot))
return true;
unsigned attributes;
if (JSValue value = thisObject->getDirect(exec->vm(), propertyName, attributes)) {
slot.setValue(thisObject, attributes, value);
return true;
}
// We don't call through to JSObject because there's no way to give an
// activation object getter properties or a prototype.
ASSERT(!thisObject->hasGetterSetterProperties());
ASSERT(thisObject->prototype().isNull());
return false;
}
void JSActivation::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
JSActivation* thisObject = static_cast<JSActivation*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
Base::visitChildren(thisObject, visitor);
// No need to mark our registers if they're still in the RegisterFile.
WriteBarrier<Unknown>* registerArray = thisObject->m_registerArray.get();
if (!registerArray)
return;
visitor.appendValues(registerArray, thisObject->m_numParametersMinusThis);
// Skip the call frame, which sits between the parameters and vars.
visitor.appendValues(registerArray + thisObject->m_numParametersMinusThis + RegisterFile::CallFrameHeaderSize, thisObject->m_numCapturedVars);
}
void JSActivation::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
JSActivation* thisObject = jsCast<JSActivation*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info);
COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
Base::visitChildren(thisObject, visitor);
// No need to mark our registers if they're still in the RegisterFile.
WriteBarrier<Unknown>* registerArray = thisObject->m_registerArray.get();
if (!registerArray)
return;
visitor.appendValues(registerArray, thisObject->m_numCapturedArgs);
// Skip 'this' and call frame.
visitor.appendValues(registerArray + CallFrame::offsetFor(thisObject->m_numCapturedArgs + 1), thisObject->m_numCapturedVars);
}
JSValue JSActivation::argumentsGetter(ExecState*, JSValue slotBase, PropertyName)
{
JSActivation* activation = jsCast<JSActivation*>(slotBase);
if (activation->isTornOff())
return jsUndefined();
CallFrame* callFrame = CallFrame::create(reinterpret_cast<Register*>(activation->m_registers));
int argumentsRegister = callFrame->codeBlock()->argumentsRegister();
if (JSValue arguments = callFrame->uncheckedR(argumentsRegister).jsValue())
return arguments;
int realArgumentsRegister = unmodifiedArgumentsRegister(argumentsRegister);
JSValue arguments = JSValue(Arguments::create(callFrame->vm(), callFrame));
callFrame->uncheckedR(argumentsRegister) = arguments;
callFrame->uncheckedR(realArgumentsRegister) = arguments;
ASSERT(callFrame->uncheckedR(realArgumentsRegister).jsValue().inherits(Arguments::info()));
return callFrame->uncheckedR(realArgumentsRegister).jsValue();
}
bool JSActivation::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor)
{
JSActivation* thisObject = jsCast<JSActivation*>(object);
if (propertyName == exec->propertyNames().arguments) {
// Defend against the inspector asking for the arguments object after it has been optimized out.
if (!thisObject->isTornOff()) {
PropertySlot slot(thisObject);
JSActivation::getOwnPropertySlot(thisObject, exec, propertyName, slot);
descriptor.setDescriptor(slot.getValue(exec, propertyName), DontEnum);
return true;
}
}
if (thisObject->symbolTableGet(propertyName, descriptor))
return true;
return Base::getOwnPropertyDescriptor(object, exec, propertyName, descriptor);
}
EncodedJSValue JSActivation::argumentsGetter(ExecState*, EncodedJSValue slotBase, EncodedJSValue, PropertyName)
{
JSActivation* activation = jsCast<JSActivation*>(JSValue::decode(slotBase));
CallFrame* callFrame = CallFrame::create(reinterpret_cast<Register*>(activation->m_registers));
ASSERT(!activation->isTornOff() && (callFrame->codeBlock()->usesArguments() || callFrame->codeBlock()->usesEval()));
if (activation->isTornOff() || !(callFrame->codeBlock()->usesArguments() || callFrame->codeBlock()->usesEval()))
return JSValue::encode(jsUndefined());
VirtualRegister argumentsRegister = callFrame->codeBlock()->argumentsRegister();
if (JSValue arguments = callFrame->uncheckedR(argumentsRegister.offset()).jsValue())
return JSValue::encode(arguments);
int realArgumentsRegister = unmodifiedArgumentsRegister(argumentsRegister).offset();
JSValue arguments = JSValue(Arguments::create(callFrame->vm(), callFrame));
callFrame->uncheckedR(argumentsRegister.offset()) = arguments;
callFrame->uncheckedR(realArgumentsRegister) = arguments;
ASSERT(callFrame->uncheckedR(realArgumentsRegister).jsValue().inherits(Arguments::info()));
return JSValue::encode(callFrame->uncheckedR(realArgumentsRegister).jsValue());
}
JSValue JSActivation::argumentsGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
JSActivation* activation = asActivation(slot.slotBase());
if (activation->d()->functionExecutable->usesArguments()) {
PropertySlot slot;
activation->symbolTableGet(exec->propertyNames().arguments, slot);
return slot.getValue(exec, exec->propertyNames().arguments);
}
CallFrame* callFrame = CallFrame::create(activation->d()->registers);
Arguments* arguments = callFrame->optionalCalleeArguments();
if (!arguments) {
arguments = new (callFrame) Arguments(callFrame);
arguments->copyRegisters();
callFrame->setCalleeArguments(arguments);
}
ASSERT(arguments->inherits(&Arguments::info));
return arguments;
}
void JSActivation::getOwnNonIndexPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
JSActivation* thisObject = jsCast<JSActivation*>(object);
if (mode == IncludeDontEnumProperties && !thisObject->isTornOff())
propertyNames.add(exec->propertyNames().arguments);
{
ConcurrentJITLocker locker(thisObject->symbolTable()->m_lock);
SymbolTable::Map::iterator end = thisObject->symbolTable()->end(locker);
for (SymbolTable::Map::iterator it = thisObject->symbolTable()->begin(locker); it != end; ++it) {
if (it->value.getAttributes() & DontEnum && mode != IncludeDontEnumProperties)
continue;
if (!thisObject->isValid(it->value))
continue;
propertyNames.add(Identifier(exec, it->key.get()));
}
}
// Skip the JSVariableObject implementation of getOwnNonIndexPropertyNames
JSObject::getOwnNonIndexPropertyNames(thisObject, exec, propertyNames, mode);
}
bool JSActivation::getOwnPropertySlot(JSCell* cell, ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
{
JSActivation* thisObject = static_cast<JSActivation*>(cell);
if (propertyName == exec->propertyNames().arguments) {
slot.setCustom(thisObject, thisObject->getArgumentsGetter());
return true;
}
if (thisObject->symbolTableGet(propertyName, slot))
return true;
if (WriteBarrierBase<Unknown>* location = thisObject->getDirectLocation(exec->globalData(), propertyName)) {
slot.setValue(location->get());
return true;
}
// We don't call through to JSObject because there's no way to give an
// activation object getter properties or a prototype.
ASSERT(!thisObject->hasGetterSetterProperties());
ASSERT(thisObject->prototype().isNull());
return false;
}
