Added JS script monitoring thread to prevent bad scripts from hanging the gui.

src/drivers/Qt/QtScriptManager.cpp

@@ -131,12 +131,12 @@ bool EmuScriptObject::paused()
 	return FCEUI_EmulationPaused() != 0;
 }
 //----------------------------------------------------
-int EmuScriptObject::framecount()
+int EmuScriptObject::frameCount()
 {
 	return FCEUMOV_GetFrame();
 }
 //----------------------------------------------------
-int EmuScriptObject::lagcount()
+int EmuScriptObject::lagCount()
 {
 	return FCEUI_GetLagCount();
 }
@@ -146,7 +146,7 @@ bool EmuScriptObject::lagged()
 	return FCEUI_GetLagged();
 }
 //----------------------------------------------------
-void EmuScriptObject::setlagflag(bool flag)
+void EmuScriptObject::setLagFlag(bool flag)
 {
 	FCEUI_SetLagFlag(flag);
 }
@@ -200,14 +200,14 @@ void EmuScriptObject::speedMode(const QString& mode)
 	FCEUD_SetEmulationSpeed(speed);
 }
 //----------------------------------------------------
-void EmuScriptObject::registerBefore(const QJSValue& func)
+void EmuScriptObject::registerBeforeFrame(const QJSValue& func)
 {
-	script->registerBefore(func);
+	script->registerBeforeEmuFrame(func);
 }
 //----------------------------------------------------
-void EmuScriptObject::registerAfter(const QJSValue& func)
+void EmuScriptObject::registerAfterFrame(const QJSValue& func)
 {
-	script->registerAfter(func);
+	script->registerAfterEmuFrame(func);
 }
 //----------------------------------------------------
 void EmuScriptObject::registerStop(const QJSValue& func)
@@ -278,7 +278,7 @@ static void addressReadCallback(unsigned int address, unsigned int value, void *
 		{
 			QJSValueList args = { address, value };
 
-			func->call(args);
+			mem->getScript()->runFunc( *func, args);
 		}
 	}
 }
@@ -295,7 +295,7 @@ static void addressWriteCallback(unsigned int address, unsigned int value, void
 		{
 			QJSValueList args = { address, value };
 
-			func->call(args);
+			mem->getScript()->runFunc( *func, args);
 		}
 	}
 }
@@ -312,7 +312,7 @@ static void addressExecCallback(unsigned int address, unsigned int value, void *
 		{
 			QJSValueList args = { address, value };
 
-			func->call(args);
+			mem->getScript()->runFunc( *func, args);
 		}
 	}
 }
@@ -699,6 +699,11 @@ void QtScriptInstance::shutdownEngine()
 		delete onScriptStopCallback;
 		onScriptStopCallback = nullptr;
 	}
+	if (onGuiUpdateCallback != nullptr)
+	{
+		delete onGuiUpdateCallback;
+		onGuiUpdateCallback = nullptr;
+	}
 
 	if (engine != nullptr)
 	{
@@ -849,7 +854,7 @@ void QtScriptInstance::loadUI(const QString& uiFilePath)
 #endif
 }
 //----------------------------------------------------
-void QtScriptInstance::registerBefore(const QJSValue& func)
+void QtScriptInstance::registerBeforeEmuFrame(const QJSValue& func)
 {
 	if (onFrameBeginCallback != nullptr)
 	{
@@ -858,7 +863,7 @@ void QtScriptInstance::registerBefore(const QJSValue& func)
 	onFrameBeginCallback = new QJSValue(func);
 }
 //----------------------------------------------------
-void QtScriptInstance::registerAfter(const QJSValue& func)
+void QtScriptInstance::registerAfterEmuFrame(const QJSValue& func)
 {
 	if (onFrameFinishCallback != nullptr)
 	{
@@ -876,6 +881,15 @@ void QtScriptInstance::registerStop(const QJSValue& func)
 	onScriptStopCallback = new QJSValue(func);
 }
 //----------------------------------------------------
+void QtScriptInstance::registerGuiUpdate(const QJSValue& func)
+{
+	if (onGuiUpdateCallback != nullptr)
+	{
+		delete onGuiUpdateCallback;
+	}
+	onGuiUpdateCallback = new QJSValue(func);
+}
+//----------------------------------------------------
 void QtScriptInstance::print(const QString& msg)
 {
 	if (dialog)
@@ -933,6 +947,26 @@ void QtScriptInstance::printSymbols(QJSValue& val, int iter)
 	}
 }
 //----------------------------------------------------
+int  QtScriptInstance::runFunc(QJSValue &func, const QJSValueList& args)
+{
+	int retval = 0;
+	auto state = getExecutionState();
+
+	state->start();
+
+	QJSValue callResult = func.call(args);
+
+	state->stop();
+
+	if (callResult.isError())
+	{
+		retval = -1;
+		running = false;
+		print(callResult.toString());
+	}
+	return retval;
+}
+//----------------------------------------------------
 int  QtScriptInstance::call(const QString& funcName, const QJSValueList& args)
 {
 	if (engine == nullptr)
@@ -947,19 +981,10 @@ int  QtScriptInstance::call(const QString& funcName, const QJSValueList& args)
 	QJSValue func = engine->globalObject().property(funcName);
 
 	FCEU_WRAPPER_LOCK();
-	QJSValue callResult = func.call(args);
+	int retval = runFunc(func, args);
 	FCEU_WRAPPER_UNLOCK();
 
-	if (callResult.isError())
+	return retval;
-	{
-		print(callResult.toString());
-	}
-	else
-	{
-		//printf("Script Call Success!\n");
-	}
-
-	return 0;
 }
 //----------------------------------------------------
 void QtScriptInstance::stopRunning()
@@ -969,12 +994,7 @@ void QtScriptInstance::stopRunning()
 	{
 		if (onScriptStopCallback != nullptr && onScriptStopCallback->isCallable())
 		{
-			QJSValue callResult = onScriptStopCallback->call();
+			runFunc( *onScriptStopCallback );
-
-			if (callResult.isError())
-			{
-				print(callResult.toString());
-			}
 		}
 		running = false;
 
@@ -987,13 +1007,7 @@ void QtScriptInstance::onFrameBegin()
 {
 	if (running && onFrameBeginCallback != nullptr && onFrameBeginCallback->isCallable())
 	{
-		QJSValue callResult = onFrameBeginCallback->call();
+		runFunc( *onFrameBeginCallback );
-
-		if (callResult.isError())
-		{
-			print(callResult.toString());
-			running = false;
-		}
 	}
 }
 //----------------------------------------------------
@@ -1001,14 +1015,59 @@ void QtScriptInstance::onFrameFinish()
 {
 	if (running && onFrameFinishCallback != nullptr && onFrameFinishCallback->isCallable())
 	{
-		QJSValue callResult = onFrameFinishCallback->call();
+		runFunc( *onFrameFinishCallback );
-
+	}
-		if (callResult.isError())
+}
+//----------------------------------------------------
+void QtScriptInstance::onGuiUpdate()
 {
-			print(callResult.toString());
+	if (running && onGuiUpdateCallback != nullptr && onGuiUpdateCallback->isCallable())
-			running = false;
+	{
+		runFunc( *onGuiUpdateCallback );
 	}
 }
+//----------------------------------------------------
+ScriptExecutionState* QtScriptInstance::getExecutionState()
+{
+	ScriptExecutionState* state;
+
+	if (onEmulationThread())
+	{
+		state = &emuFuncState;
+	}
+	else
+	{
+		state = &guiFuncState;
+	}
+	return state;
+}
+//----------------------------------------------------
+void QtScriptInstance::checkForHang()
+{
+	static constexpr uint64_t funcTimeoutMs = 1000;
+
+	if ( guiFuncState.isRunning() )
+	{
+		uint64_t timeRunningMs = guiFuncState.timeRunning();
+
+		if (timeRunningMs > funcTimeoutMs)
+		{
+			printf("Interrupted GUI Thread Script Function\n");
+			engine->setInterrupted(true);
+		}
+	}
+
+	if ( emuFuncState.isRunning() )
+	{
+		uint64_t timeRunningMs = emuFuncState.timeRunning();
+
+		if (timeRunningMs > funcTimeoutMs)
+		{
+			printf("Interrupted Emulation Thread Script Function\n");
+			engine->setInterrupted(true);
+		}
+	}
+
 }
 //----------------------------------------------------
 QString QtScriptInstance::openFileBrowser(const QString& initialPath)
@@ -1069,10 +1128,19 @@ QtScriptManager::QtScriptManager(QObject* parent)
 	: QObject(parent)
 {
 	_instance = this;
+	monitorThread = new ScriptMonitorThread_t();
+	monitorThread->start();
+
+	periodicUpdateTimer = new QTimer(this);
+	connect( periodicUpdateTimer, &QTimer::timeout, this, &QtScriptManager::guiUpdate );
+	periodicUpdateTimer->start(50); // ~20hz
 }
 //----------------------------------------------------
 QtScriptManager::~QtScriptManager()
 {
+	monitorThread->requestInterruption();
+	monitorThread->wait();
+
 	_instance = nullptr;
 	//printf("QtScriptManager destroyed\n");
 }
@@ -1096,11 +1164,13 @@ void QtScriptManager::destroy(void)
 //----------------------------------------------------
 void QtScriptManager::addScriptInstance(QtScriptInstance* script)
 {
+	FCEU::autoScopedLock autoLock(scriptListMutex);
 	scriptList.push_back(script);
 }
 //----------------------------------------------------
 void QtScriptManager::removeScriptInstance(QtScriptInstance* script)
 {
+	FCEU::autoScopedLock autoLock(scriptListMutex);
 	auto it = scriptList.begin();
 
 	while (it != scriptList.end())
@@ -1136,6 +1206,41 @@ void QtScriptManager::frameFinishedUpdate()
 	FCEU_WRAPPER_UNLOCK();
 }
 //----------------------------------------------------
+void QtScriptManager::guiUpdate()
+{
+	FCEU_WRAPPER_LOCK();
+	for (auto script : scriptList)
+	{
+		script->onGuiUpdate();
+	}
+	FCEU_WRAPPER_UNLOCK();
+}
+//----------------------------------------------------
+//---- Qt Script Monitor Thread
+//----------------------------------------------------
+ScriptMonitorThread_t::ScriptMonitorThread_t(QObject *parent)
+	: QThread(parent)
+{
+}
+//----------------------------------------------------
+void ScriptMonitorThread_t::run()
+{
+	//printf("Script Monitor Thread is Running...\n");
+	QtScriptManager* manager = QtScriptManager::getInstance();
+
+	while (!isInterruptionRequested())
+	{
+		manager->scriptListMutex.lock();
+		for (auto script : manager->scriptList)
+		{
+			script->checkForHang();
+		}
+		manager->scriptListMutex.unlock();
+		msleep(100);
+	}
+	//printf("Script Monitor Thread is Stopping...\n");
+}
+//----------------------------------------------------
 //---- Qt Script Dialog Window
 //----------------------------------------------------
 QScriptDialog_t::QScriptDialog_t(QWidget *parent)

src/drivers/Qt/QtScriptManager.h

@@ -26,8 +26,10 @@
 #include <QTreeWidget>
 #include <QTreeWidgetItem>
 #include <QJSEngine>
+#include <QThread>
 
 #include "Qt/main.h"
+#include "utils/mutex.h"
 #include "utils/timeStamp.h"
 
 class QScriptDialog_t;
@@ -85,13 +87,13 @@ public slots:
 	Q_INVOKABLE  void pause();
 	Q_INVOKABLE  void unpause();
 	Q_INVOKABLE  bool paused();
-	Q_INVOKABLE  int  framecount();
+	Q_INVOKABLE  int  frameCount();
-	Q_INVOKABLE  int  lagcount();
+	Q_INVOKABLE  int  lagCount();
 	Q_INVOKABLE  bool lagged();
-	Q_INVOKABLE  void setlagflag(bool flag);
+	Q_INVOKABLE  void setLagFlag(bool flag);
 	Q_INVOKABLE  bool emulating();
-	Q_INVOKABLE  void registerBefore(const QJSValue& func);
+	Q_INVOKABLE  void registerBeforeFrame(const QJSValue& func);
-	Q_INVOKABLE  void registerAfter(const QJSValue& func);
+	Q_INVOKABLE  void registerAfterFrame(const QJSValue& func);
 	Q_INVOKABLE  void registerStop(const QJSValue& func);
 	Q_INVOKABLE  void message(const QString& msg);
 	Q_INVOKABLE  void speedMode(const QString& mode);
@@ -113,6 +115,7 @@ public:
 	void setDialog(QScriptDialog_t* _dialog){ dialog = _dialog; }
 	void reset();
 
+	QtScriptInstance* getScript(){ return script; }
 	QJSValue* getReadFunc(int address) { return readFunc[address]; }
 	QJSValue* getWriteFunc(int address) { return writeFunc[address]; }
 	QJSValue* getExecFunc(int address) { return execFunc[address]; }
@@ -161,6 +164,36 @@ public slots:
 };
 } // JS
 
+class ScriptExecutionState
+{
+	public:
+		void start()
+		{
+			startTime.readNew();
+			executing = true;
+		}
+		void stop()
+		{
+			executing = false;
+		}
+		bool isRunning(){ return executing; }
+
+		uint64_t timeRunning()
+		{
+			FCEU::timeStampRecord now, diff;
+
+			now.readNew();
+
+			diff = now - startTime;
+
+			return diff.toMilliSeconds();
+		}
+
+	private:
+		bool executing = false;
+		FCEU::timeStampRecord startTime;
+};
+
 class QtScriptInstance : public QObject
 {
 	Q_OBJECT
@@ -177,6 +210,9 @@ public:
 	int  call(const QString& funcName, const QJSValueList& args = QJSValueList());
 	void onFrameBegin();
 	void onFrameFinish();
+	void onGuiUpdate();
+	void checkForHang();
+	int  runFunc(QJSValue &func, const QJSValueList& args = QJSValueList());
 
 	int  throwError(QJSValue::ErrorType errorType, const QString &message = QString());
 
@@ -189,6 +225,8 @@ private:
 	void printSymbols(QJSValue& val, int iter = 0);
 	void loadObjectChildren(QJSValue& jsObject, QObject* obj);
 
+	ScriptExecutionState* getExecutionState();
+
 	QJSEngine* engine = nullptr;
 	QScriptDialog_t* dialog = nullptr;
 	JS::EmuScriptObject* emu = nullptr;
@@ -197,19 +235,34 @@ private:
 	QJSValue *onFrameBeginCallback = nullptr;
 	QJSValue *onFrameFinishCallback = nullptr;
 	QJSValue *onScriptStopCallback = nullptr;
+	QJSValue *onGuiUpdateCallback = nullptr;
+	ScriptExecutionState guiFuncState;
+	ScriptExecutionState emuFuncState;
 	bool running = false;
 
 public slots:
 	Q_INVOKABLE  void print(const QString& msg);
 	Q_INVOKABLE  void loadUI(const QString& uiFilePath);
 	Q_INVOKABLE  QString openFileBrowser(const QString& initialPath = QString());
-	Q_INVOKABLE  void registerBefore(const QJSValue& func);
+	Q_INVOKABLE  void registerBeforeEmuFrame(const QJSValue& func);
-	Q_INVOKABLE  void registerAfter(const QJSValue& func);
+	Q_INVOKABLE  void registerAfterEmuFrame(const QJSValue& func);
 	Q_INVOKABLE  void registerStop(const QJSValue& func);
+	Q_INVOKABLE  void registerGuiUpdate(const QJSValue& func);
 	Q_INVOKABLE  bool onGuiThread();
 	Q_INVOKABLE  bool onEmulationThread();
 };
 
+class  ScriptMonitorThread_t : public QThread
+{
+	Q_OBJECT
+
+	protected:
+		void run( void ) override;
+
+	public:
+		ScriptMonitorThread_t( QObject *parent = 0 );
+};
+
 class QtScriptManager : public QObject
 {
 	Q_OBJECT
@@ -228,12 +281,17 @@ public:
 private:
 	static QtScriptManager* _instance;
 
+	FCEU::mutex scriptListMutex;
 	QList<QtScriptInstance*> scriptList;
-	FCEU::timeStampRecord lastFrameUpdate;
+	QTimer  *periodicUpdateTimer = nullptr;
+	ScriptMonitorThread_t *monitorThread = nullptr;
+
+	friend class ScriptMonitorThread_t; 
 
 public slots:
 	void frameBeginUpdate();
 	void frameFinishedUpdate();
+	void guiUpdate();
 };
 
 class JsPropertyItem : public QTreeWidgetItem