内存崩溃的BUG (4) 完成端口的问题？ 程序的BUG？

内存崩溃的BUG
内存崩溃的BUG (2)
内存崩溃的BUG (3)

连续三天在跟踪同个问题！！！！！！！！

今天重现了几次问题，都是下面的原因导致的。

首先要说下IOCP的实现

下面的发送包时的代码
-------------------------------------------------------------------------
PER_IO_CONTEXT* overlappedEx=new PER_IO_CONTEXT
overlappedEx->IOOperation= WRITE;
overlappedEx->wsabuf.buf= (char *)malloc( nLen );
if( NULL == overlappedEx->wsabuf.buf )
{
delete overlappedEx;
return -1;
}

if(WSASend(m_socket,&(overlappedEx->wsabuf), 0x01, &dwBytes, 0x00, &(overlappedEx->Overlapped), NULL ) == SOCKET_ERROR)
-------------------------------------------------------------------------


下面是完成端口通知时的处理代码
-------------------------------------------------------------------------
 while (m_bIsRun)
 {
  result = GetQueuedCompletionStatus(m_hCompletionPort,&iosize,&key,&overlapped,INFINITE);
  if ( 0 == key ) 
  {
   break;
  }
  if( NULL != overlappedEx )
  {
   if ( WRITE == overlappedEx->IOOperation )
   {   
    delete overlappedEx;
    continue;
   }
}

……
}
-------------------------------------------------------------------------

之后在     delete overlappedEx; 前面用 OutPutDebugString 打印了调试信息， 发现在 
 delete overlappedEx; 执行后

WSASend 里面还会访问到  overlappedEx 下面的  Overlapped，结果就在 WSASend 出错了

overlappedEx 的结构体定义如下：

struct PER_IO_CONTEXT
{
 WSAOVERLAPPED    Overlapped;
 WSABUF                      wsabuf;
 IO_OPERATION         IOOperation;
};


查了下 MSDN  WSASend 函数的说明，无头绪，明天继续