Var JavascriptGeneratorFunction::EntryGeneratorFunctionImplementation(RecyclableObject* function, CallInfo callInfo, ...)
{
PROBE_STACK(function->GetScriptContext(), Js::Constants::MinStackDefault);
ARGUMENTS(stackArgs, callInfo);
Assert(!(callInfo.Flags & CallFlags_New));
ScriptContext* scriptContext = function->GetScriptContext();
JavascriptGeneratorFunction* generatorFunction = JavascriptGeneratorFunction::FromVar(function);
// InterpreterStackFrame takes a pointer to the args, so copy them to the recycler heap
// and use that buffer for this InterpreterStackFrame.
Field(Var)* argsHeapCopy = RecyclerNewArray(scriptContext->GetRecycler(), Field(Var), stackArgs.Info.Count);
CopyArray(argsHeapCopy, stackArgs.Info.Count, stackArgs.Values, stackArgs.Info.Count);
Arguments heapArgs(callInfo, (Var*)argsHeapCopy);
DynamicObject* prototype = scriptContext->GetLibrary()->CreateGeneratorConstructorPrototypeObject();
JavascriptGenerator* generator = scriptContext->GetLibrary()->CreateGenerator(heapArgs, generatorFunction->scriptFunction, prototype);
// Set the prototype from constructor
JavascriptOperators::OrdinaryCreateFromConstructor(function, generator, prototype, scriptContext);
// Call a next on the generator to execute till the beginning of the body
CALL_ENTRYPOINT(scriptContext->GetThreadContext(), generator->EntryNext, function, CallInfo(CallFlags_Value, 1), generator);
return generator;
}
Var JavascriptGeneratorFunction::EntryAsyncFunctionImplementation(RecyclableObject* function, CallInfo callInfo, ...)
{
PROBE_STACK(function->GetScriptContext(), Js::Constants::MinStackDefault);
ARGUMENTS(stackArgs, callInfo);
ScriptContext* scriptContext = function->GetScriptContext();
JavascriptLibrary* library = scriptContext->GetLibrary();
RecyclableObject* prototype = scriptContext->GetLibrary()->GetNull();
// InterpreterStackFrame takes a pointer to the args, so copy them to the recycler heap
// and use that buffer for this InterpreterStackFrame.
Var* argsHeapCopy = RecyclerNewArray(scriptContext->GetRecycler(), Var, stackArgs.Info.Count);
js_memcpy_s(argsHeapCopy, sizeof(Var) * stackArgs.Info.Count, stackArgs.Values, sizeof(Var) * stackArgs.Info.Count);
Arguments heapArgs(callInfo, argsHeapCopy);
JavascriptExceptionObject* e = nullptr;
JavascriptPromiseResolveOrRejectFunction* resolve;
JavascriptPromiseResolveOrRejectFunction* reject;
JavascriptPromiseAsyncSpawnExecutorFunction* executor =
library->CreatePromiseAsyncSpawnExecutorFunction(
JavascriptPromise::EntryJavascriptPromiseAsyncSpawnExecutorFunction,
scriptContext->GetLibrary()->CreateGenerator(heapArgs, JavascriptAsyncFunction::FromVar(function)->GetGeneratorVirtualScriptFunction(), prototype),
stackArgs[0]);
JavascriptPromise* promise = library->CreatePromise();
JavascriptPromise::InitializePromise(promise, &resolve, &reject, scriptContext);
try
{
CALL_FUNCTION(executor, CallInfo(CallFlags_Value, 3), library->GetUndefined(), resolve, reject);
}
catch (JavascriptExceptionObject* ex)
{
e = ex;
}
if (e != nullptr)
{
JavascriptPromise::TryRejectWithExceptionObject(e, reject, scriptContext);
}
return promise;
}
BoundFunction::BoundFunction(RecyclableObject* targetFunction, Var boundThis, Var* args, uint argsCount, DynamicType * type)
: JavascriptFunction(type, &functionInfo),
count(argsCount),
boundArgs(nullptr)
{
DebugOnly(VerifyEntryPoint());
this->targetFunction = targetFunction;
this->boundThis = boundThis;
if (argsCount != 0)
{
this->boundArgs = RecyclerNewArray(this->GetScriptContext()->GetRecycler(), Var, argsCount);
for (uint i = 0; i < argsCount; i++)
{
this->boundArgs[i] = args[i];
}
}
}
Var JavascriptGeneratorFunction::EntryGeneratorFunctionImplementation(RecyclableObject* function, CallInfo callInfo, ...)
{
PROBE_STACK(function->GetScriptContext(), Js::Constants::MinStackDefault);
ARGUMENTS(stackArgs, callInfo);
ScriptContext* scriptContext = function->GetScriptContext();
JavascriptGeneratorFunction* generatorFunction = JavascriptGeneratorFunction::FromVar(function);
// InterpreterStackFrame takes a pointer to the args, so copy them to the recycler heap
// and use that buffer for this InterpreterStackFrame.
Var* argsHeapCopy = RecyclerNewArray(scriptContext->GetRecycler(), Var, stackArgs.Info.Count);
js_memcpy_s(argsHeapCopy, sizeof(Var) * stackArgs.Info.Count, stackArgs.Values, sizeof(Var) * stackArgs.Info.Count);
Arguments heapArgs(callInfo, argsHeapCopy);
DynamicObject* prototype = scriptContext->GetLibrary()->CreateGeneratorConstructorPrototypeObject();
JavascriptGenerator* generator = scriptContext->GetLibrary()->CreateGenerator(heapArgs, generatorFunction->scriptFunction, prototype);
// Set the prototype from constructor
JavascriptOperators::OrdinaryCreateFromConstructor(function, generator, prototype, scriptContext);
Assert(!(callInfo.Flags & CallFlags_New));
return generator;
}
BoundFunction::BoundFunction(Arguments args, DynamicType * type)
: JavascriptFunction(type, &functionInfo),
count(0),
boundArgs(nullptr)
{
DebugOnly(VerifyEntryPoint());
AssertMsg(args.Info.Count > 0, "wrong number of args in BoundFunction");
ScriptContext *scriptContext = this->GetScriptContext();
targetFunction = RecyclableObject::FromVar(args[0]);
// Let proto be targetFunction.[[GetPrototypeOf]]().
RecyclableObject* proto = JavascriptOperators::GetPrototype(targetFunction);
if (proto != type->GetPrototype())
{
if (type->GetIsShared())
{
this->ChangeType();
type = this->GetDynamicType();
}
type->SetPrototype(proto);
}
// If targetFunction is proxy, need to make sure that traps are called in right order as per 19.2.3.2 in RC#4 dated April 3rd 2015.
// Here although we won't use value of length, this is just to make sure that we call traps involved with HasOwnProperty(Target, "length") and Get(Target, "length")
if (JavascriptProxy::Is(targetFunction))
{
if (JavascriptOperators::HasOwnProperty(targetFunction, PropertyIds::length, scriptContext) == TRUE)
{
int len = 0;
Var varLength;
if (targetFunction->GetProperty(targetFunction, PropertyIds::length, &varLength, nullptr, scriptContext))
{
len = JavascriptConversion::ToInt32(varLength, scriptContext);
}
}
GetTypeHandler()->EnsureObjectReady(this);
}
if (args.Info.Count > 1)
{
boundThis = args[1];
// function object and "this" arg
const uint countAccountedFor = 2;
count = args.Info.Count - countAccountedFor;
// Store the args excluding function obj and "this" arg
if (args.Info.Count > 2)
{
boundArgs = RecyclerNewArray(scriptContext->GetRecycler(), Var, count);
for (uint i=0; i<count; i++)
{
boundArgs[i] = args[i+countAccountedFor];
}
}
}
else
{
// If no "this" is passed, "undefined" is used
boundThis = scriptContext->GetLibrary()->GetUndefined();
}
}
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;
}
