BOOL DynamicObject::CallToPrimitiveFunction(Var toPrimitiveFunction, PropertyId propertyId, Var* result, ScriptContext * requestContext)
{
if (JavascriptConversion::IsCallable(toPrimitiveFunction))
{
RecyclableObject* toStringFunction = RecyclableObject::FromVar(toPrimitiveFunction);
ThreadContext * threadContext = requestContext->GetThreadContext();
Var aResult = threadContext->ExecuteImplicitCall(toStringFunction, ImplicitCall_ToPrimitive, [=]() -> Js::Var
{
// Stack object should have a pre-op bail on implicit call. We shouldn't see them here.
Assert(!ThreadContext::IsOnStack(this) || threadContext->HasNoSideEffect(toStringFunction));
return toStringFunction->GetEntryPoint()(toStringFunction, CallInfo(CallFlags_Value, 1), this);
});
if (!aResult)
{
// There was an implicit call and implicit calls are disabled. This would typically cause a bailout.
Assert(threadContext->IsDisableImplicitCall());
*result = requestContext->GetLibrary()->GetNull();
return true;
}
if (JavascriptOperators::GetTypeId(aResult) <= TypeIds_LastToPrimitiveType)
{
*result = aResult;
return true;
}
}
return false;
}
Var JavascriptWeakMap::NewInstance(RecyclableObject* function, CallInfo callInfo, ...)
{
PROBE_STACK(function->GetScriptContext(), Js::Constants::MinStackDefault);
ARGUMENTS(args, callInfo);
ScriptContext* scriptContext = function->GetScriptContext();
JavascriptLibrary* library = scriptContext->GetLibrary();
Var newTarget = callInfo.Flags & CallFlags_NewTarget ? args.Values[args.Info.Count] : args[0];
bool isCtorSuperCall = (callInfo.Flags & CallFlags_New) && newTarget != nullptr && RecyclableObject::Is(newTarget);
Assert(isCtorSuperCall || !(callInfo.Flags & CallFlags_New) || args[0] == nullptr);
CHAKRATEL_LANGSTATS_INC_BUILTINCOUNT(WeakMapCount);
JavascriptWeakMap* weakMapObject = nullptr;
if (callInfo.Flags & CallFlags_New)
{
weakMapObject = library->CreateWeakMap();
}
else
{
JavascriptError::ThrowTypeErrorVar(scriptContext, JSERR_NeedObjectOfType, _u("WeakMap"), _u("WeakMap"));
}
Assert(weakMapObject != nullptr);
Var iterable = (args.Info.Count > 1) ? args[1] : library->GetUndefined();
RecyclableObject* iter = nullptr;
RecyclableObject* adder = nullptr;
if (JavascriptConversion::CheckObjectCoercible(iterable, scriptContext))
{
iter = JavascriptOperators::GetIterator(iterable, scriptContext);
Var adderVar = JavascriptOperators::GetProperty(weakMapObject, PropertyIds::set, scriptContext);
if (!JavascriptConversion::IsCallable(adderVar))
{
JavascriptError::ThrowTypeError(scriptContext, JSERR_NeedFunction);
}
adder = RecyclableObject::FromVar(adderVar);
}
if (iter != nullptr)
{
Var nextItem;
Var undefined = library->GetUndefined();
while (JavascriptOperators::IteratorStepAndValue(iter, scriptContext, &nextItem))
{
if (!JavascriptOperators::IsObject(nextItem))
{
JavascriptError::ThrowTypeError(scriptContext, JSERR_NeedObject);
}
RecyclableObject* obj = RecyclableObject::FromVar(nextItem);
Var key, value;
if (!JavascriptOperators::GetItem(obj, 0u, &key, scriptContext))
{
key = undefined;
}
if (!JavascriptOperators::GetItem(obj, 1u, &value, scriptContext))
{
value = undefined;
}
adder->GetEntryPoint()(adder, CallInfo(CallFlags_Value, 3), weakMapObject, key, value);
}
}
return isCtorSuperCall ?
JavascriptOperators::OrdinaryCreateFromConstructor(RecyclableObject::FromVar(newTarget), weakMapObject, nullptr, scriptContext) :
weakMapObject;
}
Var BoundFunction::NewInstance(RecyclableObject* function, CallInfo callInfo, ...)
{
RUNTIME_ARGUMENTS(args, callInfo);
ScriptContext* scriptContext = function->GetScriptContext();
if (args.Info.Count == 0)
{
JavascriptError::ThrowTypeError(scriptContext, JSERR_NeedFunction /* TODO-ERROR: get arg name - args[0] */);
}
BoundFunction *boundFunction = (BoundFunction *) function;
Var targetFunction = boundFunction->targetFunction;
//
// var o = new boundFunction()
// a new object should be created using the actual function object
//
Var newVarInstance = nullptr;
if (callInfo.Flags & CallFlags_New)
{
if (JavascriptProxy::Is(targetFunction))
{
JavascriptProxy* proxy = JavascriptProxy::FromVar(targetFunction);
Arguments proxyArgs(CallInfo(CallFlags_New, 1), &targetFunction);
args.Values[0] = newVarInstance = proxy->ConstructorTrap(proxyArgs, scriptContext, 0);
}
else
{
args.Values[0] = newVarInstance = JavascriptOperators::NewScObjectNoCtor(targetFunction, scriptContext);
}
}
Js::Arguments actualArgs = args;
if (boundFunction->count > 0)
{
BOOL isCrossSiteObject = boundFunction->IsCrossSiteObject();
// OACR thinks that this can change between here and the check in the for loop below
const unsigned int argCount = args.Info.Count;
if ((boundFunction->count + argCount) > CallInfo::kMaxCountArgs)
{
JavascriptError::ThrowRangeError(scriptContext, JSERR_ArgListTooLarge);
}
Var *newValues = RecyclerNewArray(scriptContext->GetRecycler(), Var, boundFunction->count + argCount);
uint index = 0;
//
// For [[Construct]] use the newly created var instance
// For [[Call]] use the "this" to which bind bound it.
//
if (callInfo.Flags & CallFlags_New)
{
newValues[index++] = args[0];
}
else
{
newValues[index++] = boundFunction->boundThis;
}
// Copy the bound args
if (!isCrossSiteObject)
{
for (uint i = 0; i < boundFunction->count; i++)
{
newValues[index++] = boundFunction->boundArgs[i];
}
}
else
{
// it is possible that the bound arguments are not marshalled yet.
for (uint i = 0; i < boundFunction->count; i++)
{
newValues[index++] = CrossSite::MarshalVar(scriptContext, boundFunction->boundArgs[i]);
}
}
// Copy the extra args
for (uint i=1; i<argCount; i++)
{
newValues[index++] = args[i];
}
actualArgs = Arguments(args.Info, newValues);
actualArgs.Info.Count = boundFunction->count + argCount;
}
else
{
if (!(callInfo.Flags & CallFlags_New))
{
actualArgs.Values[0] = boundFunction->boundThis;
}
}
RecyclableObject* actualFunction = RecyclableObject::FromVar(targetFunction);
Var aReturnValue = JavascriptFunction::CallFunction<true>(actualFunction, actualFunction->GetEntryPoint(), actualArgs);
//
// [[Construct]] and call returned a non-object
// return the newly created var instance
//
if ((callInfo.Flags & CallFlags_New) && !JavascriptOperators::IsObject(aReturnValue))
{
aReturnValue = newVarInstance;
}
return aReturnValue;
}