ClonedArguments* ClonedArguments::createEmpty(
VM& vm, Structure* structure, JSFunction* callee, unsigned length)
{
unsigned vectorLength = length;
if (vectorLength > MAX_STORAGE_VECTOR_LENGTH)
return 0;
Butterfly* butterfly;
if (UNLIKELY(structure->needsSlowPutIndexing())) {
butterfly = createArrayStorageButterfly(vm, nullptr, structure, length, vectorLength);
butterfly->arrayStorage()->m_numValuesInVector = vectorLength;
} else {
void* temp = vm.heap.tryAllocateAuxiliary(nullptr, Butterfly::totalSize(0, structure->outOfLineCapacity(), true, vectorLength * sizeof(EncodedJSValue)));
if (!temp)
return 0;
butterfly = Butterfly::fromBase(temp, 0, structure->outOfLineCapacity());
butterfly->setVectorLength(vectorLength);
butterfly->setPublicLength(length);
for (unsigned i = length; i < vectorLength; ++i)
butterfly->contiguous()[i].clear();
}
ClonedArguments* result =
new (NotNull, allocateCell<ClonedArguments>(vm.heap))
ClonedArguments(vm, structure, butterfly);
result->finishCreation(vm);
result->m_callee.set(vm, result, callee);
result->putDirect(vm, clonedArgumentsLengthPropertyOffset, jsNumber(length));
return result;
}
ClonedArguments* ClonedArguments::createEmpty(
VM& vm, Structure* structure, JSFunction* callee)
{
ClonedArguments* result =
new (NotNull, allocateCell<ClonedArguments>(vm.heap))
ClonedArguments(vm, structure);
result->finishCreation(vm);
result->m_callee.set(vm, result, callee);
return result;
}
