为什么我程序停止在KeWaitForSingleObject处了

KSEMAPHORE  gstartiosem;
KSEMAPHORE  gdothreadsem;
KSEMAPHORE  gcmdcpltsem;
PCOMMAND gpcmdinthrd = NULL;
VOID fThreadPrint(IN PVOID pContex)
{
 OsPrint(("in thread "));
 KeReleaseSemaphore(&gdothreadsem, 0, 1, 0);
 while(1)
 {
  OsPrint(("wait cmd in"));
  KeWaitForSingleObject(&gstartiosem, Executive, KernelMode, FALSE, NULL);
  ldm_queue_cmd(gpcmdinthrd);
  OsPrint(("cmd cmplt"));
  KeReleaseSemaphore(&gcmdcpltsem, 0, 1, 0);
 }
 //PsTerminateSystemThread(STATUS_SUCCESS);
}
void CreateThread()
{
 HANDLE hThread;
 KeInitializeSemaphore(&gdothreadsem, 1, 1);
 KeInitializeSemaphore(&gstartiosem, 1, 1);
 KeInitializeSemaphore(&gcmdcpltsem, 1 ,1);
 KeWaitForSingleObject(&gdothreadsem, Executive, KernelMode, FALSE, NULL);
 KeWaitForSingleObject(&gstartiosem, Executive, KernelMode, FALSE, NULL);
 KeWaitForSingleObject(&gcmdcpltsem, Executive, KernelMode, FALSE, NULL);
 OsPrint(("create thread"));
 PsCreateSystemThread(&hThread, 0, NULL, NULL, NULL, fThreadPrint, NULL);
 KeWaitForSingleObject(&gdothreadsem, Executive, KernelMode, FALSE, NULL);
 ZwClose(hThread);
 OsPrint(("exit main thread"));
}
然后我在一个函数里等待命令然后唤醒线程，这里是不断的会被调用的。
  gpcmdinthrd = pCmd;
  KeReleaseSemaphore(&gstartiosem, 0, 1, 0);
  OsPrint(("wait gcmdcpltsem"));
  KeWaitForSingleObject(&gcmdcpltsem, Executive, KernelMode, FALSE, NULL);
 OsPrint(("return in OsSendCommand"));
 
我在Windbg下调试打印时，发现这个线程只运行了一遍，第二遍时就卡在了 KeWaitForSingleObject(&gcmdcpltsem, Executive, KernelMode, FALSE, NULL);这里
拜托各位帮我看看怎么回事
急求解啊

求回复，求帮助

没劲