創(chuàng)建死鎖程序

    using System;

using System.Threading;





namespace ConsoleApplication1

{

    class Program

    {

        static void Main()

        {

            new Program().Test1();

        }



        private void Test1()

        {

            lock (this)

            {

                Console.WriteLine("Enter Test1");

                new Thread(() =>

                    {

                        Thread.Sleep(2000);

                        Test2();

                    }).Start();

                Console.ReadKey();

                Console.WriteLine("Exit Test1");

            }

        }



        private void Test2()

        {

            lock (this)

            {

                Console.WriteLine("Test2");

            }

        }

    }

}
  

運(yùn)行程序后（不要點(diǎn)擊鍵盤）創(chuàng)建.dump文件

使用WinDbg進(jìn)行分析

執(zhí)行~*e!clrstack查看所有持有和等待鎖的線程（的下一條要執(zhí)行的代碼）

    0:000> ~*e!clrstack

OS Thread Id: 0x26d4 (0)

        Child SP               IP Call Site

000000000045ea38 000007ffe9ab2c5a [InlinedCallFrame: 000000000045ea38] Microsoft.Win32.Win32Native.ReadConsoleInput(IntPtr, InputRecord ByRef, Int32, Int32 ByRef)

000000000045ea38 000007ffd1e3f64e [InlinedCallFrame: 000000000045ea38] Microsoft.Win32.Win32Native.ReadConsoleInput(IntPtr, InputRecord ByRef, Int32, Int32 ByRef)

000000000045e9f0 000007ffd1e3f64e DomainNeutralILStubClass.IL_STUB_PInvoke(IntPtr, InputRecord ByRef, Int32, Int32 ByRef)

000000000045eb30 000007ffd1ea9961 System.Console.ReadKey(Boolean)

000000000045ec50 000007ff7b5501b1 ConsoleApplication1.Program.Test1() [f:\Documents\Visual Studio 2012\Projects\2012test\ConsoleApplication1\Program.cs @ 25]

000000000045ecc0 000007ff7b5500a8 ConsoleApplication1.Program.Main() [f:\Documents\Visual Studio 2012\Projects\2012test\ConsoleApplication1\Program.cs @ 11]

000000000045efd0 000007ffdac338f3 [GCFrame: 000000000045efd0] 

OS Thread Id: 0x2b74 (1)

Unable to walk the managed stack. The current thread is likely not a 

managed thread. You can run !threads to get a list of managed threads in

the process

Failed to start stack walk: 80070057

OS Thread Id: 0x2a60 (2)

        Child SP               IP Call Site

000000001af8f8c8 000007ffe9ab319b [DebuggerU2MCatchHandlerFrame: 000000001af8f8c8] 

OS Thread Id: 0x1978 (3)

Unable to walk the managed stack. The current thread is likely not a 

managed thread. You can run !threads to get a list of managed threads in

the process

Failed to start stack walk: 80070057

OS Thread Id: 0x242c (4)

        Child SP               IP Call Site

000000001ba6e9d8 000007ffe9ab319b [GCFrame: 000000001ba6e9d8] 

000000001ba6eb18 000007ffe9ab319b [GCFrame: 000000001ba6eb18] 

000000001ba6eb58 000007ffe9ab319b [HelperMethodFrame_1OBJ: 000000001ba6eb58] System.Threading.Monitor.Enter(System.Object)

000000001ba6ec50 000007ff7b550300 ConsoleApplication1.Program.Test2() [f:\Documents\Visual Studio 2012\Projects\2012test\ConsoleApplication1\Program.cs @ 33]

000000001ba6ecb0 000007ffd16afb65 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)

000000001ba6ee10 000007ffd16af8c9 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)

000000001ba6ee40 000007ffd16af887 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)

000000001ba6ee90 000007ffd16c2fe1 System.Threading.ThreadHelper.ThreadStart()

000000001ba6f1a8 000007ffdac338f3 [GCFrame: 000000001ba6f1a8] 

000000001ba6f4d8 000007ffdac338f3 [DebuggerU2MCatchHandlerFrame: 000000001ba6f4d8] 


  

執(zhí)行!runaway查看占有鎖的線程運(yùn)行了多長(zhǎng)時(shí)間

    0:000> !runaway

 User Mode Time

  Thread       Time

   4:242c      0 days 0:00:00.000

   3:1978      0 days 0:00:00.000

   2:2a60      0 days 0:00:00.000

   1:2b74      0 days 0:00:00.000

   0:26d4      0 days 0:00:00.000


  

執(zhí)行.time看進(jìn)程運(yùn)行了多長(zhǎng)時(shí)間

    0:000> .time

Debug session time: Mon May 20 17:22:13.000 2013 (UTC + 8:00)

System Uptime: 0 days 7:14:13.190

Process Uptime: 0 days 0:00:11.000

  Kernel time: 0 days 0:00:00.000

  User time: 0 days 0:00:00.000


  

執(zhí)行!threads看所有的線程統(tǒng)計(jì)情況

    0:000> !threads

ThreadCount:      3

UnstartedThread:  0

BackgroundThread: 1

PendingThread:    0

DeadThread:       0

Hosted Runtime:   no

                                                                                                        Lock  

       ID OSID ThreadOBJ           State GC Mode     GC Alloc Context                  Domain           Count Apt Exception

   0    1 26d4 00000000004fe850    2a020 Preemptive  0000000002826698:0000000002827FD0 00000000004d2ab0 2     MTA 

   2    2 2a60 00000000005056a0    2b220 Preemptive  0000000000000000:0000000000000000 00000000004d2ab0 0     MTA (Finalizer) 

   4    3 242c 000000000052aca0  202b020 Preemptive  0000000002828010:0000000002829FD0 00000000004d2ab0 0     MTA 


  

可看到線程0有兩個(gè)鎖

執(zhí)行!syncblk查看哪些線程拿到了鎖

    0:000> !syncblk

Index SyncBlock MonitorHeld Recursion Owning Thread Info  SyncBlock Owner

    2 000000000052b978            3         1 00000000004fe850 26d4   0   0000000002822e88 ConsoleApplication1.Program

-----------------------------

Total           2

CCW             0

RCW             0

ComClassFactory 0

Free            0


  

可看到線程“00000000004fe850?”拿到了鎖，再通過!threads命令得到其線程邏輯號(hào)為0，即可切換至該線程，并通過!clrstack打印出其運(yùn)行堆棧。

備注

• ? 若表現(xiàn)為界面死掉，就直接找UI線程（STA線程就一個(gè)）
• ? 堆棧分為本地堆棧與托管堆棧，線程號(hào)也有本地線程號(hào)與托管線程號(hào)
• ? 可使用!dso (DumpStackObjects)查看當(dāng)前堆棧的所有對(duì)象
• ? 可使用?!analyze -v 分析掛掉線程的詳細(xì)情形，錯(cuò)誤原因

使用WinDbg分析死鎖