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.
CallFrame* callFrame = CallFrame::create(reinterpret_cast<Register*>(thisObject->m_registers));
if (!thisObject->isTornOff() && (callFrame->codeBlock()->usesArguments() || callFrame->codeBlock()->usesEval())) {
slot.setCustom(thisObject, DontEnum, argumentsGetter);
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;
}
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, thisObject->getArgumentsGetter());
return true;
}
}
if (thisObject->symbolTableGet(propertyName, slot))
return true;
if (JSValue value = thisObject->getDirect(exec->vm(), propertyName)) {
slot.setValue(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;
}
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());
}
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]);
}
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);
}
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);
}
