《Advanced .NET Debugging》 读书笔记 Listing 6-8: Orphaned lock的示例

using System;
using System.Threading;
namespace Advanced.NET.Debugging.Chapter6
{
    class Abort
    {
        public void WorkerThread()
        {
            try
            {
                //
                // Do some work
                //
            }
            finally
            {
                // Do some cleanup while holding a lock
                lock (this)
                {
                }
            }
        }
   
        public static void Main(string[] args)
        {
            Abort abort = new Abort();
            Thread worker = new Thread(abort.WorkerThread);
            lock (abort)
            {
                worker.Start();
                Console.WriteLine("Acquired lock");
                Thread.Sleep(2000);
                Console.WriteLine("Aborting worker thread");
                worker.Abort();
            }
        }
    }
}

程序的问题在于， 主线程在锁定abort之后，尝试强行abort一个thread，而这个thread在被abort的时候将执finally内的lock方法。这个时候，主线程的aborrt方法将不会成功，因为abort对象已经被lock，所以finally块无法再将这个abort对象进行lock。

1. 双击运行程序 06Abort.exe

2. .loadby sos.dll mscorwks

3. .load sosex.dll

4. !dlk