/* static */ void
ArgumentsObject::MaybeForwardToCallObject(AbstractFramePtr frame, JSObject *obj,
ArgumentsData *data)
{
JSScript *script = frame.script();
if (frame.fun()->isHeavyweight() && script->argsObjAliasesFormals()) {
obj->initFixedSlot(MAYBE_CALL_SLOT, ObjectValue(frame.callObj()));
for (AliasedFormalIter fi(script); fi; fi++)
data->args[fi.frameIndex()] = JS::MagicValueUint32(fi.scopeSlot());
}
}
/* static */ void
ArgumentsObject::MaybeForwardToCallObject(AbstractFramePtr frame, ArgumentsObject* obj,
ArgumentsData* data)
{
JSScript* script = frame.script();
if (frame.callee()->needsCallObject() && script->argumentsAliasesFormals()) {
obj->initFixedSlot(MAYBE_CALL_SLOT, ObjectValue(frame.callObj()));
for (PositionalFormalParameterIter fi(script); fi; fi++) {
if (fi.closedOver())
data->args[fi.argumentSlot()] = MagicEnvSlotValue(fi.location().slot());
}
}
}
void
js::SetReturnValueForClosingGenerator(JSContext* cx, AbstractFramePtr frame)
{
CallObject& callObj = frame.callObj();
// Get the generator object stored on the scope chain and close it.
Shape* shape = callObj.lookup(cx, cx->names().dotGenerator);
GeneratorObject& genObj = callObj.getSlot(shape->slot()).toObject().as<GeneratorObject>();
genObj.setClosed();
// Return value is already set in GeneratorThrowOrClose.
if (genObj.is<StarGeneratorObject>())
return;
// Legacy generator .close() always returns |undefined|.
MOZ_ASSERT(genObj.is<LegacyGeneratorObject>());
frame.setReturnValue(UndefinedValue());
}
void
js::SetReturnValueForClosingGenerator(JSContext *cx, AbstractFramePtr frame)
{
CallObject &callObj = frame.callObj();
// Get the generator object stored on the scope chain and close it.
Shape *shape = callObj.lookup(cx, cx->names().dotGenerator);
GeneratorObject &genObj = callObj.getSlot(shape->slot()).toObject().as<GeneratorObject>();
genObj.setClosed();
Value v;
if (genObj.is<StarGeneratorObject>()) {
// The return value is stored in the .genrval slot.
shape = callObj.lookup(cx, cx->names().dotGenRVal);
v = callObj.getSlot(shape->slot());
} else {
// Legacy generator .close() always returns |undefined|.
MOZ_ASSERT(genObj.is<LegacyGeneratorObject>());
v = UndefinedValue();
}
frame.setReturnValue(v);
}
