void WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, NakedPtr<JSC::Exception>& returnedException)
{
if (isExecutionForbidden())
return;
initScriptIfNeeded();
ExecState* exec = m_workerGlobalScopeWrapper->globalExec();
JSLockHolder lock(exec);
JSC::evaluate(exec, sourceCode.jsSourceCode(), m_workerGlobalScopeWrapper->globalThis(), returnedException);
VM& vm = exec->vm();
if ((returnedException && isTerminatedExecutionException(returnedException)) || isTerminatingExecution()) {
forbidExecution();
return;
}
if (returnedException) {
String errorMessage;
int lineNumber = 0;
int columnNumber = 0;
String sourceURL = sourceCode.url().string();
if (m_workerGlobalScope->sanitizeScriptError(errorMessage, lineNumber, columnNumber, sourceURL, sourceCode.cachedScript())) {
vm.throwException(exec, createError(exec, errorMessage.impl()));
returnedException = vm.exception();
vm.clearException();
}
}
}
void JSEventListener::handleEvent(ScriptExecutionContext* scriptExecutionContext, Event* event)
{
ASSERT(scriptExecutionContext);
if (!scriptExecutionContext || scriptExecutionContext->isJSExecutionForbidden())
return;
VM& vm = scriptExecutionContext->vm();
JSLockHolder lock(vm);
auto scope = DECLARE_CATCH_SCOPE(vm);
// See https://dom.spec.whatwg.org/#dispatching-events spec on calling handleEvent.
// "If this throws an exception, report the exception." It should not propagate the
// exception.
JSObject* jsFunction = this->jsFunction(scriptExecutionContext);
if (!jsFunction)
return;
JSDOMGlobalObject* globalObject = toJSDOMGlobalObject(scriptExecutionContext, *m_isolatedWorld);
if (!globalObject)
return;
if (scriptExecutionContext->isDocument()) {
JSDOMWindow* window = jsCast<JSDOMWindow*>(globalObject);
if (!window->wrapped().isCurrentlyDisplayedInFrame())
return;
if (wasCreatedFromMarkup() && !scriptExecutionContext->contentSecurityPolicy()->allowInlineEventHandlers(sourceURL(), sourcePosition().m_line))
return;
// FIXME: Is this check needed for other contexts?
ScriptController& script = window->wrapped().frame()->script();
if (!script.canExecuteScripts(AboutToExecuteScript) || script.isPaused())
return;
}
ExecState* exec = globalObject->globalExec();
JSValue handleEventFunction = jsFunction;
CallData callData;
CallType callType = getCallData(handleEventFunction, callData);
// If jsFunction is not actually a function, see if it implements the EventListener interface and use that
if (callType == CallType::None) {
handleEventFunction = jsFunction->get(exec, Identifier::fromString(exec, "handleEvent"));
if (UNLIKELY(scope.exception())) {
auto* exception = scope.exception();
scope.clearException();
event->target()->uncaughtExceptionInEventHandler();
reportException(exec, exception);
return;
}
callType = getCallData(handleEventFunction, callData);
}
if (callType != CallType::None) {
Ref<JSEventListener> protectedThis(*this);
MarkedArgumentBuffer args;
args.append(toJS(exec, globalObject, event));
Event* savedEvent = globalObject->currentEvent();
globalObject->setCurrentEvent(event);
VMEntryScope entryScope(vm, vm.entryScope ? vm.entryScope->globalObject() : globalObject);
InspectorInstrumentationCookie cookie = JSMainThreadExecState::instrumentFunctionCall(scriptExecutionContext, callType, callData);
JSValue thisValue = handleEventFunction == jsFunction ? toJS(exec, globalObject, event->currentTarget()) : jsFunction;
NakedPtr<JSC::Exception> exception;
JSValue retval = scriptExecutionContext->isDocument()
? JSMainThreadExecState::profiledCall(exec, JSC::ProfilingReason::Other, handleEventFunction, callType, callData, thisValue, args, exception)
: JSC::profiledCall(exec, JSC::ProfilingReason::Other, handleEventFunction, callType, callData, thisValue, args, exception);
InspectorInstrumentation::didCallFunction(cookie, scriptExecutionContext);
globalObject->setCurrentEvent(savedEvent);
if (is<WorkerGlobalScope>(*scriptExecutionContext)) {
auto scriptController = downcast<WorkerGlobalScope>(*scriptExecutionContext).script();
bool terminatorCausedException = (scope.exception() && isTerminatedExecutionException(scope.exception()));
if (terminatorCausedException || scriptController->isTerminatingExecution())
scriptController->forbidExecution();
}
if (exception) {
event->target()->uncaughtExceptionInEventHandler();
reportException(exec, exception);
} else {
if (!retval.isUndefinedOrNull() && is<BeforeUnloadEvent>(*event))
downcast<BeforeUnloadEvent>(*event).setReturnValue(retval.toWTFString(exec));
if (m_isAttribute) {
if (retval.isFalse())
event->preventDefault();
}
}
}
}
