EncodedJSValue doCallToJavaScript(void* executableAddress, ProtoCallFrame* protoCallFrame)
{
CodeBlock* codeBlock = protoCallFrame->codeBlock();
JSScope* scope = protoCallFrame->scope();
JSObject* callee = protoCallFrame->callee();
int argCountIncludingThis = protoCallFrame->argumentCountIncludingThis();
int argCount = protoCallFrame->argumentCount();
JSValue thisValue = protoCallFrame->thisValue();
JSStack& stack = scope->vm()->interpreter->stack();
CallFrame* newCallFrame = stack.pushFrame(codeBlock, scope, argCountIncludingThis, callee);
if (UNLIKELY(!newCallFrame)) {
JSGlobalObject* globalObject = scope->globalObject();
ExecState* exec = globalObject->globalExec();
return JSValue::encode(throwStackOverflowError(exec));
}
// Set the arguments for the callee:
newCallFrame->setThisValue(thisValue);
for (int i = 0; i < argCount; ++i)
newCallFrame->setArgument(i, protoCallFrame->argument(i));
JSValue result = execute(newCallFrame, executableAddress);
stack.popFrame(newCallFrame);
return JSValue::encode(result);
}
JSObject* JSScope::resolve(ExecState* exec, JSScope* scope, const Identifier& ident)
{
VM& vm = exec->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
ScopeChainIterator end = scope->end();
ScopeChainIterator it = scope->begin();
while (1) {
JSScope* scope = it.scope();
JSObject* object = it.get();
// Global scope.
if (++it == end) {
JSScope* globalScopeExtension = scope->globalObject(vm)->globalScopeExtension();
if (UNLIKELY(globalScopeExtension)) {
bool hasProperty = object->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty)
return object;
JSObject* extensionScopeObject = JSScope::objectAtScope(globalScopeExtension);
hasProperty = extensionScopeObject->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty)
return extensionScopeObject;
}
return object;
}
bool hasProperty = object->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty) {
bool unscopable = isUnscopable(exec, scope, object, ident);
ASSERT(!throwScope.exception() || !unscopable);
if (!unscopable)
return object;
}
}
}