if (notifyExit) {  return; }
  public void activate() throws VM_PragmaUninterruptible   {    if (active == true) {      if (notifyExit) {	// handled in thresholdReached	return;      }      VM.sysWriteln("***VM_TraceWriter.activate() active == true!  PID ",		    ((VM_TraceWriter)this).getPid(),"***");      VM.shutdown(VM.exitStatusMiscTrouble);    }    if(VM_HardwarePerformanceMonitors.verbose>=2)VM.sysWriteln("VM_TraceWriter.activate()");    active = true;    VM_Thread org = tq.dequeue();    if (VM.VerifyAssertions) VM._assert(org != null);    org.schedule();  }