void LockManager::run() {
  deadlock_detector_->start();

  const std::uint64_t kMaxTryIncoming =
      static_cast<std::uint64_t>(FLAGS_max_try_incoming);
  const std::uint64_t kMaxTryInner =
      static_cast<std::uint64_t>(FLAGS_max_try_incoming);

  while (true) {
    for (std::uint64_t tries = 0; tries < kMaxTryIncoming; ++tries) {
      if (!incoming_requests_.empty()) {
        const LockRequest request = incoming_requests_.popOne();
        if (request.getRequestType() == RequestType::kReleaseLocks) {
          CHECK(releaseAllLocks(request.getTransactionId()))
              << "Unexpected condition occured.";

        } else if (acquireLock(request.getTransactionId(),
                               request.getResourceId(),
                               request.getAccessMode())) {
          LOG(INFO) << "Transaction "
                    << std::to_string(request.getTransactionId())
                    << " is waiting " + request.getResourceId().toString();

            inner_pending_requests_.push(request);
        } else {
            LOG(INFO) << "Transaction "
                      << std::to_string(request.getTransactionId())
                      << " acquired " + request.getResourceId().toString();

            permitted_requests_.push(request);
        }
      }
    }

    for (std::uint64_t tries = 0; tries < kMaxTryInner; ++tries) {
      if (!inner_pending_requests_.empty()) {
        const LockRequest request = inner_pending_requests_.front();

        if (acquireLock(request.getTransactionId(), request.getResourceId(),
                        request.getAccessMode())) {
          inner_pending_requests_.pop();
          permitted_requests_.push(request);
        }
      }
    }

    // Resolve deadlocks.
    killVictims();
  }
}
Esempio n. 2
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//============================================================================
//		NTimer::RemoveTimer : Remove a timer.
//----------------------------------------------------------------------------
void NTimer::RemoveTimer(NTimerID theTimer)
{	StLock					acquireLock(mLock);
	NTimerMapIterator		theIter;



	// Remove all timers
	if (theTimer == kNTimerAll)
		{
		for (theIter = mTimers.begin(); theIter != mTimers.end(); theIter++)
			NTargetTime::TimerDestroy(theIter->first);
		
		mTimers.clear();
		}
	
	
	
	// Remove a single timer
	else
		{
		theIter = mTimers.find(theTimer);
		NN_ASSERT(theIter != mTimers.end());

		if (theIter != mTimers.end())
			{
			NTargetTime::TimerDestroy(theIter->first);
			mTimers.erase(theIter);
			}
		}
}
Esempio n. 3
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int reportWork(const char *stateFileName, int fLock, int finishedBlockID)
{
		FILE *fState;

		if(acquireLock(fLock) == LOCK_FAIL) return REPORT_FAIL;

		if((fState = fopen(stateFileName, "r+")) == NULL)
		{
				mexPrintf("Unable to read stateFile\n");
				fState = NULL;
				return REPORT_FAIL;
		}

		int blockID;
		int state;
		int dummy;


		while (!feof(fState))
		{
				dummy = fscanf(fState,"%d\t%d\n",&blockID, &state);
				if(blockID == finishedBlockID) break;
		}


		int curPos = ftell(fState);
		fseek(fState, curPos - 2, SEEK_SET);
		fputs("2\n",fState);
		fclose(fState);

		while(releaseLock(fLock) != LOCK_SUCCESS) sleep(1);
		return REPORT_SUCCESS;
}
Esempio n. 4
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//============================================================================
//		NThreadPool::Resume : Resume the pool.
//----------------------------------------------------------------------------
void NThreadPool::Resume(void)
{	StLock						acquireLock(mLock);
	NThreadTaskListIterator		theIter;



	// Validate our state
	NN_ASSERT(mIsPaused);



	// Schedule the tasks
	//
	// The threads are blocked until we release the lock, so any sorting
	// of the task list will be deferred until the first thread can run.
	for (theIter = mTasksPending.begin(); theIter != mTasksPending.end(); theIter++)
		ScheduleTask(*theIter);



	// Update our state
	mIsPaused = false;
	
	mTasksPending.clear();
}
Esempio n. 5
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//============================================================================
//		NTimer::ResetTimer : Reset a timer.
//----------------------------------------------------------------------------
void NTimer::ResetTimer(NTime fireAfter, NTimerID theTimer)
{	StLock					acquireLock(mLock);
	NTimerMapIterator		theIter;



	// Adjust all timers
	if (theTimer == kNTimerAll)
		{
		for (theIter = mTimers.begin(); theIter != mTimers.end(); theIter++)
			NTargetTime::TimerReset(theIter->first, fireAfter);
		}
	
	
	
	// Adjust a single timer
	else
		{
		theIter = mTimers.find(theTimer);
		NN_ASSERT(theIter != mTimers.end());
		
		if (theIter != mTimers.end())
			NTargetTime::TimerReset(theIter->first, fireAfter);
		}
}
Esempio n. 6
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//============================================================================
//		NThreadPool::SetThreadLimit : Set the thread limit.
//----------------------------------------------------------------------------
void NThreadPool::SetThreadLimit(NIndex theValue)
{	StLock	acquireLock(mLock);



	// Set our state
	mThreadLimit = theValue;
}
Esempio n. 7
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//============================================================================
//		NThreadPool::GetThreadLimit : Get the thread limit.
//----------------------------------------------------------------------------
NIndex NThreadPool::GetThreadLimit(void) const
{	StLock	acquireLock(mLock);



	// Get our state
	return(mThreadLimit);
}
Esempio n. 8
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File: monitor.c Progetto: ahua/java
/*
 * Execute the MONITORENTER instruction
 */
void op_monitorenter() {
    Ref object = peekRef(); // don't pop in case gc runs
    Ref lock = getLock(object);
    if (lock == NULL) { return; } // roll back, gc done
    popRef(); // can pop now, no turning back
    pc++;
    acquireLock(thread, lock, 1);
}
Esempio n. 9
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//============================================================================
//		NMessageServer::GetStatus : Get the status.
//----------------------------------------------------------------------------
NMessageServerStatus NMessageServer::GetStatus(void) const
{	StLock	acquireLock(mLock);



	// Get the status
	return(mStatus);
}
Esempio n. 10
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//============================================================================
//		NMessageServer::DisconnectClient : Disconnect a client.
//----------------------------------------------------------------------------
void NMessageServer::DisconnectClient(NEntityID clientID)
{	StLock		acquireLock(mLock);



	// Disconnect the client
	ClientDisconnected(clientID);
	RemoveClient(      clientID);
}
Esempio n. 11
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/* virtual */ SysStatus
ServerFileVirtFSTmp<T>::handleXObjFree(XHandle xhandle)
{
    SysStatusUval rc;
    (void) ServerFile::handleXObjFree(xhandle);
    acquireLock();
    rc = DREF(obj)->_close(VClnt(xhandle)->userData(), VClnt(xhandle)->token);
    releaseLock();
    return rc;
}
Esempio n. 12
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/* virtual */ SysStatusUval
ServerFileVirtFSTmp<T>::_write(const char *buf, uval len, __XHANDLE xhandle)
{
    SysStatusUval rc;
    acquireLock();
    tassertMsg(len <= maxIOLoad, "len %ld too big for ppc call\n", len);
    rc = DREF(obj)->_write(buf, len, VClnt(xhandle)->userData(),
			   VClnt(xhandle)->token);
    releaseLock();
    return rc;
}
Esempio n. 13
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//============================================================================
//		NThreadPool::GetPendingTasks : Get the number of pending tasks.
//----------------------------------------------------------------------------
NIndex NThreadPool::GetPendingTasks(void) const
{	StLock		acquireLock(mLock);
	NIndex		numTasks;



	// Get the size
	numTasks = (NIndex) mTasks.size();

	return(numTasks);
}
Esempio n. 14
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//============================================================================
//		NTargetThread::ThreadSetName : Set the current thread name.
//----------------------------------------------------------------------------
void NTargetThread::ThreadSetName(const NString &theName)
{	StLock							acquireLock(gThreadNameLock);
	NThreadID			theID;



	// Get the state we need
	theID = ThreadGetID();

	gThreadNames[theID] = theName;
}
Esempio n. 15
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//============================================================================
//		NThreadPool::AddTask : Add a task to the pool.
//----------------------------------------------------------------------------
void NThreadPool::AddTask(NThreadTask *theTask)
{	StLock	acquireLock(mLock);



	// Add the task
	if (mIsPaused)
		mTasksPending.push_back(theTask);
	else
		ScheduleTask(theTask);
}
Esempio n. 16
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//============================================================================
//		NThreadPool::CancelTasks : Cancel the outstanding tasks.
//----------------------------------------------------------------------------
void NThreadPool::CancelTasks(void)
{	StLock							acquireLock(mLock);
	NThreadTaskListConstIterator	theIter;



	// Cancel the tasks
	for (theIter = mTasks.begin(); theIter != mTasks.end(); theIter++)
		delete *theIter;
	
	mTasks.clear();
}
Esempio n. 17
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//============================================================================
//		NMessageServer::SocketDidOpen : A socket has been opened.
//----------------------------------------------------------------------------
void NMessageServer::SocketDidOpen(NSocket *theSocket)
{	StLock		acquireLock(mLock);



	// Start the server
	if (theSocket == &mSocket)
		{
		NN_ASSERT(mStatus == kNServerStarting);

		mStatus = kNServerStarted;
		ServerStarted();
		}
}
Esempio n. 18
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//============================================================================
//		NTargetThread::ThreadGetName : Get the current thread name.
//----------------------------------------------------------------------------
NString NTargetThread::ThreadGetName(void)
{	StLock							acquireLock(gThreadNameLock);
	ThreadNameMapConstIterator		theIter;
	NString							theName;



	// Get the name
	theIter = gThreadNames.find(ThreadGetID());
	if (theIter != gThreadNames.end())
		theName = theIter->second;
	
	return(theName);
}
Esempio n. 19
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//============================================================================
//		NTimer::HasTimer : Do we have a timer?
//----------------------------------------------------------------------------
bool NTimer::HasTimer(NTimerID theTimer) const
{	StLock		acquireLock(mLock);
	bool		hasTimer;



	// Check our state
	if (theTimer == kNTimerAny)
		hasTimer = !mTimers.empty();
	else
		hasTimer = (mTimers.find(theTimer) != mTimers.end());
	
	return(hasTimer);
}
Esempio n. 20
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//============================================================================
//		NThreadPool::Pause : Pause the pool.
//----------------------------------------------------------------------------
void NThreadPool::Pause(void)
{	StLock	acquireLock(mLock);



	// Validate our state
	NN_ASSERT(!mIsPaused);
	NN_ASSERT(mTasksPending.empty());



	// Update our state
	mIsPaused = true;
}
Esempio n. 21
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//============================================================================
//		NMessageServer::GetPendingWrites : Get the amount of pending write data.
//----------------------------------------------------------------------------
NIndex NMessageServer::GetPendingWrites(void) const
{	StLock							acquireLock(mLock);
	NClientInfoMapConstIterator		theIter;
	NIndex							theSize;



	// Check the sockets
	theSize = 0;

	for (theIter = mClients.begin(); theIter != mClients.end(); theIter++)
		theSize += theIter->second.theSocket->GetPendingWrites();
	
	return(theSize);
}
Esempio n. 22
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//============================================================================
//		NTimer::AddTimer : Add a timer.
//----------------------------------------------------------------------------
NTimerID NTimer::AddTimer(const NTimerFunctor &theFunctor, NTime fireAfter, NTime fireEvery)
{	StLock		acquireLock(mLock);
	NTimerID	theID;



	// Create th etimer
	theID = NTargetTime::TimerCreate(theFunctor, fireAfter, fireEvery);
	if (theID != kNTimerNone)
		{
		NN_ASSERT(mTimers.find(theID) == mTimers.end());
		mTimers[theID] = theFunctor;
		}
	
	return(theID);
}
bool ApplicationLaunch::sendMessage(QString filename)
{
   if (acquireLock())
      return false;

   HWND hwndAppLaunch = NULL;
   do
   {
      hwndAppLaunch = ::FindWindowEx(HWND_MESSAGE, hwndAppLaunch, NULL, WINDOW_TITLE);
   } while (hwndAppLaunch == (HWND)winId()); // Ignore ourselves

   if (::IsWindow(hwndAppLaunch))
   {
      HWND hwnd = reinterpret_cast<HWND>(::SendMessage(hwndAppLaunch,
                                                       wmGetMainWindowHandle(),
                                                       0,
                                                       0));
      if (::IsWindow(hwnd))
      {
         HWND hwndPopup = ::GetLastActivePopup(hwnd);
         if (::IsWindow(hwndPopup))
            hwnd = hwndPopup;
         ::SetForegroundWindow(hwnd);
         if (::IsIconic(hwnd))
            ::ShowWindow(hwnd, SW_RESTORE);

         if (!filename.isEmpty())
         {
            QByteArray data = filename.toUtf8();

            COPYDATASTRUCT copydata;
            copydata.dwData = OPENFILE;
            copydata.lpData = data.data();
            copydata.cbData = data.size();

            HWND sender = (HWND)winId();

            ::SendMessage(hwndAppLaunch,
                          WM_COPYDATA,
                          reinterpret_cast<WPARAM>(sender),
                          reinterpret_cast<LPARAM>(&copydata));
         }
      }
   }

   return true;
}
Esempio n. 24
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/* virtual */ SysStatusUval
ServerFileVirtFSTmp<T>::_read(char *buf, uval len, __XHANDLE xhandle)
{
    SysStatus rc;
    acquireLock();
#ifdef TESTING_ITFC_WITH_OFFSET
    tassertMsg(len <= maxIOLoad, "len %ld too big for ppc call\n", len);
    rc = DREF(obj)->_readOff(buf, len, Clnt(xhandle)->filePosition,
			     VClnt(xhandle)->userData(),
			     VClnt(xhandle)->token);
    _IF_FAILURE_RET(rc);

    Clnt(xhandle)->filePosition += _SGETUVAL(rc);
    releaseLock();
    return rc;
#else
    passertMsg(Clnt(xhandle)->isSharingOffset == 0, "NIY\n");

    rc = DREF(obj)->_getMaxReadSize(bufsize, VClnt(xhandle)->token);
    if (_FAILURE(rc)) {
	releaseLock();
	return rc;
    }
    tassertMsg(bufsize <= maxIOLoad, "bufsize %ld too big for ppc call\n",
	       len);
    // using read interface where data is returned from beginging of file
    char *full_buf = (char*) AllocGlobal::alloc(bufsize);
    rc = DREF(obj)->_read(full_buf, bufsize,
			  VClnt(xhandle)->userData(), VClnt(xhandle)->token);
    _IF_FAILURE_RET(rc);

    uval length_read = _SGETUVAL(rc);
    if (length_read > 0 && Clnt(xhandle)->filePosition < length_read) {
	uval offset = Clnt(xhandle)->filePosition;
	if (len > length_read - offset) {
	    len = length_read - offset;
	}
	memcpy(buf, &full_buf[offset], len);
	Clnt(xhandle)->filePosition += len;
	releaseLock();
	return _SRETUVAL(len);
    } else {
	releaseLock();
	return _SERROR(2160, FileLinux::EndOfFile, 0);
    }
#endif
}
Esempio n. 25
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//============================================================================
//		NMessageServer::Start : Start the server.
//----------------------------------------------------------------------------
void NMessageServer::Start(void)
{	StLock		acquireLock(mLock);



	// Validate our parameters and state
	NN_ASSERT(mPort       != 0);
	NN_ASSERT(mMaxClients >= 1 && mMaxClients <= kNEntityClientsMax);

	NN_ASSERT(mStatus == kNServerStopped);



	// Start the server
	mStatus = kNServerStarting;

	mSocket.Open(mPort);
}
Esempio n. 26
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//============================================================================
//		NMessageServer::SocketHasConnection : The socket has a connection.
//----------------------------------------------------------------------------
NSocketConnectionFunctor NMessageServer::SocketHasConnection(NSocket *theSocket, NSocket *newSocket)
{	StLock							acquireLock(mLock);
	NSocketConnectionFunctor		theFunctor;



	// Validate our parameters and state
	NN_ASSERT(theSocket == &mSocket);
	
	NN_UNUSED(theSocket);



	// Get the functor
	if (mStatus == kNServerStarted)
		theFunctor = BindSelf(NMessageServer::ServerThread, newSocket);
	
	return(theFunctor);
}
Esempio n. 27
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void ThreadedScheduler::tick()
{
    //unsigned int num_popped = 0;
    //bool some_todo = true;
    //while (some_todo)
    //{
    //    Message message;
    //    some_todo = queue_.try_pop(message);
    //    if (some_todo)
    //    {
    //        handlePoppedMessage(message);
    //    }
    //    ++ num_popped;
    //    if (num_popped >= max_messages_per_tick_)
    //        some_todo = false;
    //}
    ScopedLock::ptr lock = acquireLock();
    tickGraphs();
    //std::cout << "ThreadedScheduler" << __FUNCTION__ << std::endl;
}
Esempio n. 28
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//============================================================================
//		NMessageServer::SendMessage : Send a message.
//----------------------------------------------------------------------------
void NMessageServer::SendMessage(const NNetworkMessage &theMsg)
{	StLock							acquireLock(mLock);
	NClientInfoMapConstIterator		theIter;
	NEntityID						dstID;



	// Get the state we need
	dstID = theMsg.GetDestination();



	// Send to self
	if (dstID == GetID())
		ReceivedMessage(theMsg);


	// Send to everyone
	else if (dstID == kNEntityEveryone)
		{
		ReceivedMessage(theMsg);

		for (theIter = mClients.begin(); theIter != mClients.end(); theIter++)
			(void) WriteMessage(theIter->second.theSocket, theMsg, false);
		}


	// Send to a client
	//
	// To handle tainted data, we check as well as assert.
	else
		{
		theIter = mClients.find(dstID);
		NN_ASSERT(theIter != mClients.end());

		if (theIter != mClients.end())
			(void) WriteMessage(theIter->second.theSocket, theMsg, false);
		}
}
Esempio n. 29
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/**
 * The rxapi main entry point.
 *
 * @param argc   The command line arguments
 * @param argv   The arguments
 *
 * @return The completion return code.
 */
int main(int argc, char *argv[])
{
    if (argc > 1)
    {
        printf("rxapi: no args allowed\n");
    }

    // a buffer for generating the name
    char lockFileName[PATH_MAX + 100];

    // the location of the lock file
    char pipePath[PATH_MAX];
    // determine the best place to put this
    SysServerLocalSocketConnectionManager::getServiceLocation(pipePath, sizeof(pipePath));
    snprintf(lockFileName, sizeof(lockFileName), "%s.lock", pipePath);
    printf("rxapi: lockfile path is %s\n", lockFileName);

    // see if we can get the lock file before proceeding. This is one
    // file per user.
    int fd;
    if ((fd = acquireLock(lockFileName)) == -1)
    {
        printf("rxapi: lockfile is locked by another rxapi instance; exiting\n");
        return EACCES;
    }
    printf("rxapi: lockfile lock acquired\n");

    struct sigaction sa;

    // handle kill -15
    (void) sigemptyset(&sa.sa_mask);
    (void) sigaddset(&sa.sa_mask, SIGTERM);
    sa.sa_flags = SA_RESTART;
    sa.sa_handler = Stop;
    if (sigaction(SIGTERM, &sa, NULL) == -1)
    {
        printf("rxapi: sigaction(SIGTERM) failed; exiting\n");
        exit(1);
    }

    // turn off SIGPIPE signals in case the other end of the
    // pipe terminates on us.
    signal(SIGPIPE, SIG_IGN);

    try
    {
        // create a connection object that will be the server target
        SysServerLocalSocketConnectionManager *c = new SysServerLocalSocketConnectionManager();
        // try to create the named pipe used for this server. If this fails, we
        // likely have an instance of the daemon already running, so just fail quietly.
        const char *service = SysServerLocalSocketConnectionManager::generateServiceName();
        printf("rxapi: service path is %s\n", service);
        if (!c->bind(service))
        {
            printf("rxapi: service is locked by another rxapi instance; exiting\n");
            delete c;
            return EACCES;
        }
        apiServer.initServer(c);              // start up the server
        printf("rxapi: service successfully started; listening\n");
        apiServer.listenForConnections();     // go into the message loop
    }
    catch (ServiceException *e)
    {
        delete e;  // just ignore errors
    }
    apiServer.terminateServer();     // shut everything down
    releaseLock(lockFileName, fd);   // release the exclusive lock
    printf("rxapi: service stopped and lockfile released; exiting\n");

    return 0;
}
Esempio n. 30
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File: invoke.c Progetto: ahua/java
/*
 * Execute the specified method. Return true if the method is executed,
 * false if it is rolled back for garbage collection.
 *
 * target: object for instance methods, class for static
 * method: the method to be run
 * offset: amount to increment program counter
 */
int executeMethod(Ref target, Ref method, int offset) {
/*
printf("[");
if (method[ENTRY_FLAGS].i & ACC_STATIC) { debugString(target[TYPE_NAME].s); }
else { debugString(method[ENTRY_OWNER].s[TYPE_NAME].s); }
printf(".");
debugString(method[ENTRY_NAME].s);
debugString(method[ENTRY_DESCRIPTOR].s);
printf("]\n");
*/
    // check for native method
    Int argcount = getInt(method, METHOD_ARG_COUNT);
    Int flags = getInt(method, ENTRY_FLAGS);
    if (flags & ACC_NATIVE) {
        return executeNativeMethod(target, method, offset);
    }

    // if synchronized, acquire the lock
    Ref lock = NULL;
    if (flags & ACC_SYNCHRONIZED) {
        lock = getLock(target);
        if (lock == NULL) { return FALSE; } // rollback, gc done
        acquireLock(thread, lock, 0);
        if (thread == NULL) { return FALSE; } // rollback, wait for lock 
    }

    // allocate space for new frame
    Int maxLocals = getInt(method, METHOD_MAX_LOCALS);
    Int maxStack = getInt(method, METHOD_MAX_STACK);
    int numWords = FRAME_LOCALS + 2*maxLocals + 2*maxStack;
    Ref newFrame = allocate(numWords, HEADER_STACK_FRAME);
    if (newFrame == NULL) { return FALSE; } // rollback, gc done

    // increment lock count now that instruction can't be rolled back
    if (flags & ACC_SYNCHRONIZED) {
        Int count = getInt(lock, LOCK_COUNT);
        setInt(lock, LOCK_COUNT, count + 1);
    }

    // initialise new frame
    int hash = (char*) newFrame - (char*) core;
    Ref frameType = getRef(frame, OBJECT_TYPE);
    setInt(newFrame, OBJECT_HASHCODE, hash);
    setRef(newFrame, OBJECT_LOCK, lock);
    setRef(newFrame, OBJECT_TYPE, frameType);
    setRef(newFrame, FRAME_RETURN_FRAME, frame);
    setRef(newFrame, FRAME_METHOD, method);
    setInt(newFrame, FRAME_RETURN_PC, pc + offset);
    setInt(newFrame, FRAME_PC, 0);
    setInt(newFrame, FRAME_SP, numWords * 4);

    // pop arguments off current stack and write to new frame
    int index = argcount;
    while (--index >= 0) {
        if (refOnStack()) { setLocalRef(index, popRef(), newFrame); }
        else { setLocalInt(index, popInt(), newFrame); }
    }

    // point current thread to new frame
    saveRegisters();
    setRef(thread, THREAD_FRAME, newFrame);
    loadRegisters();
    return TRUE;
}