ClonedArguments* ClonedArguments::createWithInlineFrame(ExecState* myFrame, ExecState* targetFrame, InlineCallFrame* inlineCallFrame, ArgumentsMode mode)
{
VM& vm = myFrame->vm();
JSFunction* callee;
if (inlineCallFrame)
callee = jsCast<JSFunction*>(inlineCallFrame->calleeRecovery.recover(targetFrame));
else
callee = jsCast<JSFunction*>(targetFrame->jsCallee());
ClonedArguments* result = nullptr;
unsigned length = 0; // Initialize because VC needs it.
switch (mode) {
case ArgumentsMode::Cloned: {
if (inlineCallFrame) {
if (inlineCallFrame->argumentCountRegister.isValid())
length = targetFrame->r(inlineCallFrame->argumentCountRegister).unboxedInt32();
else
length = inlineCallFrame->arguments.size();
length--;
result = createEmpty(myFrame, callee, length);
for (unsigned i = length; i--;)
result->initializeIndex(vm, i, inlineCallFrame->arguments[i + 1].recover(targetFrame));
} else {
length = targetFrame->argumentCount();
result = createEmpty(myFrame, callee, length);
for (unsigned i = length; i--;)
result->initializeIndex(vm, i, targetFrame->uncheckedArgument(i));
}
break;
}
case ArgumentsMode::FakeValues: {
result = createEmpty(myFrame, callee, 0);
break;
} }
ASSERT(myFrame->lexicalGlobalObject()->clonedArgumentsStructure() == result->structure());
ASSERT(!result->structure(vm)->needsSlowPutIndexing() || shouldUseSlowPut(result->structure(vm)->indexingType()));
return result;
}
ClonedArguments* ClonedArguments::createByCopyingFrom(
ExecState* exec, Structure* structure, Register* argumentStart, unsigned length,
JSFunction* callee)
{
VM& vm = exec->vm();
ClonedArguments* result = createEmpty(vm, structure, callee, length);
for (unsigned i = length; i--;)
result->initializeIndex(vm, i, argumentStart[i].jsValue());
ASSERT(!result->structure(vm)->needsSlowPutIndexing() || shouldUseSlowPut(result->structure(vm)->indexingType()));
return result;
}
