Net 高级调试之七:线程操作相关命令介绍

一、简介

今天是《Net 高级调试》的第七篇文章。上一篇文章我们说了值类型,引用类型,数组等的内存表现形式。有了这个基础,我们可以更好的了解我们的程序在运行时的状态,内存里有什么东西,它们的结构组成是什么样子的,对我们调试程序是更有帮助的。今天,我们要说一些和线程有关的话题,虽然和线程相关,但是不是多线程的知识,不是线程安全的知识。今天我们讨论的是如何查看线程,它的表现形式,以及线程的调用栈,调用栈,又分为托管线程的调用栈和非托管线程的调用栈,这些也是我们高级调试必须掌握的。有了这些基础,我们就知道了程序的开始端点,调试的起点我们就找到了。虽然这些都是基础,如果这些掌握不好,以后的高级调试的道路,也不好走。当然了,第一次看视频或者看书,是很迷糊的,不知道如何操作,还是那句老话,一遍不行,那就再来一遍,还不行,那就再来一遍,俗话说的好,书读千遍,其意自现。

如果在没有说明的情况下,所有代码的测试环境都是 Net Framewok 4.8,但是,有时候为了查看源码,可能需要使用 Net Core 的项目,我会在项目章节里进行说明。好了,废话不多说,开始我们今天的调试工作。

调试环境我需要进行说明,以防大家不清楚,具体情况我已经罗列出来。

操作系统:Windows Professional 10
**          调试工具:Windbg Preview(可以去Microsoft Store 去下载)**
**          开发工具:Visual Studio 2022**
**          Net 版本:Net Framework 4.8**
**          CoreCLR源码:源码下载**
二、基础知识

1、线程类相关介绍

1.1、简介

在高级调试的过程中,很难不和 线程、线程栈 打交道,所以好好的学习并掌握有关线程操作的命令是很有必要的。

2、获取 线程列表 的命令

2.1、查看线程列表。

可以使用【!t】命令获取所有的托管线程。

2.2、使用 Net 7.0 查看线程列表

可以使用【!t】命令获取所有的托管线程,如果我们想查看 CLR 的线程对象的结构就只能使用开源版本了,这里使用Net 7.0。

3、查看非托管线程栈

Windbg 是随 Windows 成长起来的非托管调试器,它自带的命令只能查看非托管调用栈,因为 C# 中的线程栈是托管函数,而托管函数是一种运行时编译的,所以这个命令往往看不到托管部分。

3.1、使用 k 命令查看非托管线程栈

【k】命令可以查看线程栈,但是么有办法展示托管函数,作为补充,可以使用【!clrstack】命令。

3.2、使用 kb 命令查看线程栈。

很多时候我们需要获取非托管函数的参数,这个时候我们可以使用【kb】命令。

3.3、查看托管函数栈

SOS 提供了一个专门查看托管函数调用栈的命令,毕竟只有 JIT更熟悉托管函数,也知道编译后的机器码放在什么位置。

这个命令就是【!clrstack】。

!clrstack -a:这个命令表示将线程栈中的所有局部变量和参数全部输出。

!clrstack -p:这个命令表示将线程栈中的参数全部输出。

!clrstack -l:这个命令表示将线程栈中的所有局部变量全部输出。

我们还可以查看所有托管线程栈,可以使用【~*e】命令。

3.4、查看托管和非托管合体

使用【!dumpstack】命令查看托管和非托管的线程栈**。**

3.5、执行所有线程的 DumpStack。

如果我们想查看所有线程的线程栈,可以使用【!EEStack】,也可以使用【~*e !dumpstack】,结果是一样的。
三、测试过程

废话不多说,这一节是具体的调试操作的过程,又可以说是眼见为实的过程,在开始之前,我还是要啰嗦两句,这一节分为两个部分,第一部分是测试的源码部分,没有代码,当然就谈不上测试了,调试必须有载体。第二部分就是根据具体的代码来证实我们学到的知识,是具体的眼见为实。

1、测试源码

1.1、Example_7_1_1

复制代码
 1 namespace Example_7_1_1
 2 {
 3     internal class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7             int a = 10;
 8             int b = 11;
 9             Test(12);
10             Console.ReadLine();
11         }
12 
13         private static void Test(int c)
14         {
15             Task.Run(() => { Run1(); });
16             Task.Run(() => { Run2(); });
17             Task.Run(() => { Run3(); });
18         }
19 
20         private static void Run1()
21         {
22             Console.WriteLine($"tid={Environment.CurrentManagedThreadId},Run1 正在运行");
23             Console.ReadLine();
24             Console.WriteLine($"tid={Environment.CurrentManagedThreadId},Run1 结束运行");
25         }
26 
27         private static void Run2()
28         {
29             Console.WriteLine($"tid={Environment.CurrentManagedThreadId},Run2 正在运行");
30             Console.ReadLine();
31             Console.WriteLine($"tid={Environment.CurrentManagedThreadId},Run2 结束运行");
32         }
33 
34         private static void Run3()
35         {
36             Console.WriteLine($"tid={Environment.CurrentManagedThreadId},Run3 正在运行");
37             Console.ReadLine();
38             Console.WriteLine($"tid={Environment.CurrentManagedThreadId},Run3 结束运行");
39         }
40     }
41 }

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1.2、Example_7_1_2(特别说明,这个项目是 Net 7.0)

复制代码
 1 namespace Example_7_1_2
 2 {
 3     internal class Program
 4     {
 5         static void Main(string[] args)
 6         {
 7             Console.WriteLine("Hello, World!");
 8             Debugger.Break();
 9         }
10     }
11 }

View Code

2、眼见为实

项目的所有操作都是一样的,所以就在这里说明一下,但是每个测试例子,都需要重新启动,并加载相应的应用程序,加载方法都是一样的。流程如下:我们编译项目,打开 Windbg,点击【文件】----》【launch executable】附加程序,打开调试器的界面,程序已经处于中断状态。我们需要使用【g】命令,继续运行程序,然后到达指定地点停止后,我们可以点击【break】按钮,就可以调试程序了。有时候可能需要切换到主线程,可以使用【~0s】命令。

2.1、使用 【!t】命令查看进程中有多少个托管线程。 测试源码:Example_7_1_1

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 1 0:012> !t
 2 ThreadCount:      6
 3 UnstartedThread:  0
 4 BackgroundThread: 5
 5 PendingThread:    0
 6 DeadThread:       0
 7 Hosted Runtime:   no
 8                                                                          Lock  
 9        ID OSID ThreadOBJ    State GC Mode     GC Alloc Context  Domain   Count Apt Exception
10    0    1 2ef4 00c73930     2a020 Preemptive  02B94F38:00000000 00c6d758 1     MTA 
11    5    2 39c0 00cb0728     2b220 Preemptive  00000000:00000000 00c6d758 0     MTA (Finalizer) 
12    9    3 17dc 00cdc010   3029220 Preemptive  02B9C6C8:00000000 00c6d758 0     MTA (Threadpool Worker) 
13   10    4  a18 00cdc9b8   3029220 Preemptive  02B98350:00000000 00c6d758 0     MTA (Threadpool Worker) 
14   11    5 31d0 00cdd360   3029220 Preemptive  02B9A350:00000000 00c6d758 0     MTA (Threadpool Worker) 
15   13    6  9a0 00ce05c0   1029220 Preemptive  02B9E1E8:00000000 00c6d758 0     MTA (Threadpool Worker) 

ThreadCount:有多少个托管线程,这个进程里面有6个。

UnstartedThread:已经创建,但是还没有使用的线程,当前数量是0。

BackgroundThread:后台线程的数量,这个进程里面有5个。

PendingThread:阻塞的线程的数量,当前这个进程是0个阻塞的线程。

DeadThread:当一个线程完成任务,但是还没有被回收,这个阶段的线程就是死线程,也就是说这个线程对象底层的数据结构的 OSID 已经销毁。

以上就是介绍的主要名称,下面接着介绍,列表的每一项。我们使用 C# Thread 类型声明一个线程的时候,其实在操作系统和CLR都有一个数据结构相对应,有了 OSID我们才可以在任务管理器中看到线程对象。

第一列,没有标题,是 WindbgThreadId,Windbg 自己的给 Thread 打了一个标记,便于以后使用,也可以区分托管线程和非托管线程。

第二列 ID:是托管线程,也就是我们 Thread 类型的标识符 Id,就是 这段代码的值:Environment.CurrentManagedThreadId
              第三列 OSID:操作系统线程的 ID,
              第四列 ThreadOBJ:CLR 底层的 Thread 线程对象,可以使用【dp】命令观察其中的内容,我们查看托管线程 ID=3 的【00cdc010】内容,红色标注就是托管线程的ID,就是3。

复制代码
1 0:012> dp 00cdc010
2 00cdc010  72074bd4 03029220 00000000 055ff680
3 00cdc020  00000000 00c6d758 00000000 00000003
4 00cdc030  00cdc034 00cdc034 00cdc034 00000000
5 00cdc040  00000000 baad0000 00c6ed50 0094f000
6 00cdc050  02b9c6c8 02b9dfe8 00003d10 00000000
7 00cdc060  00000000 00000000 00000000 00000000
8 00cdc070  00000000 baadf00d 70ad2c60 00cdc850
9 00cdc080  00000000 00000000 00000000 00000000

第五列 State:CLR 层面的线程状态,03029220就是托管线程的状态。我们可以点进去或者使用【!threadstate】命令查看线程状态详情,当前就是托管线程是3的状态。

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1 0:012> !ThreadState 3029220
2     Legal to Join(可以执行 join 操作)
3     Background(是后台线程)
4     CLR Owns(是CLR 拥有的线程)
5     In Multi Threaded Apartment(是MTA模式)
6     Fully initialized(已经完全初始化)
7     Thread Pool Worker Thread(是线程池线程)
8     Interruptible(可执行中断操作)

第六列 GC Mode:表示当前的线程有没有操作托管堆的权限。
              第七列 GC Alloc Context:缓冲区的开始节点和结束节点,每个线程在托管堆中分配一个对象,都有一个缓冲区,这个就是确定了缓冲区起始和结束。
              第八列 Domain:表示当前线程所属于的域。
              第九列 Lock Count:表示当前的线程有多少个托管锁。
              第十列 Apt:表示线程是 STA(线程串行模式,WPF、WinForm) 模式还是 MTA (多线程并行模式)模式。
              第十一列 Exception:在当前线程上发生了异常,会把这个异常和这个线程关联起来。
              Finalizer 表示当前是终结器线程,Threadpool Worker 表示线程是线程池的线程。

2.2、如何查看 CLR Thread 的结构,也就是查看 ThreadOBJ 的结构。

测试源码:Example_7_1_2(Net 7.0项目

如果我们想在 Net Framework 环境下查看 CLR 线程对象的结构是很难的,因为他是不开源的,所以我们只能新建 Net 7.0 的项目。

输出所有的线程列表。

复制代码
 1 0:000> !t
 2 ThreadCount:      3
 3 UnstartedThread:  0
 4 BackgroundThread: 2
 5 PendingThread:    0
 6 DeadThread:       0
 7 Hosted Runtime:   no
 8                                                                                                             Lock  
 9  DBG   ID     OSID ThreadOBJ           State GC Mode     GC Alloc Context                  Domain           Count Apt Exception
10    0    1      624 00000199DFD0CAE0    2a020 Preemptive  00000199E440AD60:00000199E440C750 00000199dfd02dd0 -00001 MTA 
11    5    2     1344 00000199DFD51DD0    21220 Preemptive  0000000000000000:0000000000000000 00000199dfd02dd0 -00001 Ukn (Finalizer) 
12    6    3     3b40 000001DA763B15E0    2b220 Preemptive  0000000000000000:0000000000000000 00000199dfd02dd0 -00001 MTA 

然后,我们使用【dt】命令,查看线程的结构。

复制代码
  1 0:000> dt coreclr!Thread 00000199DFD0CAE0
  2    +0x000 m_stackLocalAllocator : (null) 
  3    =00007ffd`027a8af0 m_DetachCount    : 0n0
  4    =00007ffd`027a8af4 m_ActiveDetachCount : 0n0
  5    +0x008 m_State          : Volatile<enum Thread::ThreadState>
  6    +0x00c m_fPreemptiveGCDisabled : Volatile<unsigned long>
  7    +0x010 m_pFrame         : 0x0000008a`24f7e478 Frame
  8    +0x018 m_pDomain        : 0x00000199`dfd02dd0 AppDomain
  9    +0x020 m_ThreadId       : 1
 10    +0x028 m_pHead          : 0x00000199`dfd0cb10 LockEntry
 11    +0x030 m_embeddedEntry  : LockEntry
 12    +0x050 m_pBlockingLock  : VolatilePtr<DeadlockAwareLock,DeadlockAwareLock *>
 13    +0x058 m_alloc_context  : gc_alloc_context
 14    +0x090 m_thAllocContextObj : TypeHandle
 15    +0x098 m_pTEB           : 0x0000008a`24c20000 _NT_TIB
 16    +0x0a0 m_pRCWStack      : 0x00000199`dfd0d710 RCWStackHeader
 17    +0x0a8 m_ThreadTasks    : 0 (No matching name)
 18    +0x0ac m_StateNC        : 100 ( TSNC_ExistInThreadStore )
 19    +0x0b0 m_dwForbidSuspendThread : Volatile<long>
 20    +0x0b4 m_dwHashCodeSeed : 0xdfca504a
 21    +0x0b8 m_pLoadLimiter   : (null) 
 22    +0x0c0 m_AbortType      : 0
 23    +0x0c8 m_AbortEndTime   : 0xffffffff`ffffffff
 24    +0x0d0 m_RudeAbortEndTime : 0xffffffff`ffffffff
 25    +0x0d8 m_fRudeAbortInitiated : 0n0
 26    +0x0dc m_AbortController : 0n0
 27    +0x0e0 m_AbortRequestLock : 0n0
 28    +0x0e4 m_ThrewControlForThread : 0
 29    +0x0e8 m_OSContext      : 0x00000199`dfd0d210 _CONTEXT
 30    +0x0f0 m_pPendingTypeLoad : (null) 
 31    +0x0f8 m_Link           : SLink
 32    +0x100 m_dwLastError    : 0
 33    +0x108 m_CacheStackBase : 0x0000008a`24f80000 Void
 34    +0x110 m_CacheStackLimit : 0x0000008a`24e00000 Void
 35    +0x118 m_CacheStackSufficientExecutionLimit : 0x0000008a`24e20000
 36    +0x120 m_CacheStackStackAllocNonRiskyExecutionLimit : 0x0000008a`24e80000
 37    +0x128 m_pvHJRetAddr    : 0xcccccccc`cccccccc Void
 38    +0x130 m_ppvHJRetAddrPtr : 0xcccccccc`cccccccc  -> ???? 
 39    +0x138 m_HijackedFunction : 0xbaadf00d`baadf00d MethodDesc
 40    +0x140 m_UserInterrupt  : 0n0
 41    +0x148 m_DebugSuspendEvent : CLREvent
 42    +0x158 m_EventWait      : CLREvent
 43    +0x168 m_WaitEventLink  : WaitEventLink
 44    +0x198 m_ThreadHandle   : 0x00000000`000001e0 Void
 45    +0x1a0 m_ThreadHandleForClose : 0xffffffff`ffffffff Void
 46    +0x1a8 m_ThreadHandleForResume : 0xffffffff`ffffffff Void
 47    +0x1b0 m_WeOwnThreadHandle : 0n1
 48    +0x1b8 m_OSThreadId     : 0x624
 49    +0x1c0 m_ExposedObject  : 0x00000199`dfc411f8 OBJECTHANDLE__
 50    +0x1c8 m_StrongHndToExposedObject : 0x00000199`dfc413f8 OBJECTHANDLE__
 51    +0x1d0 m_Priority       : 0x80000000
 52    +0x1d4 m_ExternalRefCount : 1
 53    +0x1d8 m_TraceCallCount : 0n0
 54    +0x1e0 m_LastThrownObjectHandle : (null) 
 55    +0x1e8 m_ltoIsUnhandled : 0n0
 56    +0x1f0 m_ExceptionState : ThreadExceptionState
 57    +0x398 m_debuggerFilterContext : (null) 
 58    +0x3a0 m_pProfilerFilterContext : (null) 
 59    +0x3a8 m_hijackLock     : Volatile<long>
 60    +0x3b0 m_hCurrNotification : 0xbaadf00d`baadf00d OBJECTHANDLE__
 61    +0x3b8 m_fInteropDebuggingHijacked : 0n0
 62    +0x3bc m_profilerCallbackState : 0
 63    +0x3c0 m_dwProfilerEvacuationCounters : [33] Volatile<unsigned long>
 64    +0x444 m_workerThreadPoolCompletionCount : 0
 65    =00007ffd`027b3cc0 s_workerThreadPoolCompletionCountOverflow : 0
 66    +0x448 m_ioThreadPoolCompletionCount : 0
 67    =00007ffd`027b3cc8 s_ioThreadPoolCompletionCountOverflow : 0
 68    +0x44c m_monitorLockContentionCount : 0
 69    =00007ffd`027a8ad8 s_monitorLockContentionCountOverflow : 0
 70    +0x450 m_PreventAsync   : 0n0
 71    =00007ffd`027a6204 m_DebugWillSyncCount : 0n-1
 72    +0x458 m_pSavedRedirectContext : (null) 
 73    +0x460 m_pOSContextBuffer : (null) 
 74    +0x468 m_ThreadLocalBlock : ThreadLocalBlock
 75    +0x490 m_tailCallTls    : TailCallTls
 76    +0x4a0 m_dwAVInRuntimeImplOkayCount : 0
 77    +0x4a8 m_pExceptionDuringStartup : (null) 
 78    +0x4b0 m_debuggerActivePatchSkipper : VolatilePtr<DebuggerPatchSkip,DebuggerPatchSkip *>
 79    +0x4b8 m_fAllowProfilerCallbacks : 0n1
 80    +0x4c0 m_pIOCompletionContext : 0x00000199`dfd0da40 Void
 81    +0x4c8 m_dwThreadHandleBeingUsed : Volatile<long>
 82    =00007ffd`027a8ad0 s_fCleanFinalizedThread : 0n0
 83    +0x4d0 m_pCreatingThrowableForException : (null) 
 84    +0x4d8 m_dwIndexClauseForCatch : 0
 85    +0x4e0 m_sfEstablisherOfActualHandlerFrame : StackFrame
 86    +0x4e8 DebugBlockingInfo : ThreadDebugBlockingInfo
 87    +0x4f0 m_fDisableComObjectEagerCleanup : 0
 88    +0x4f1 m_fHasDeadThreadBeenConsideredForGCTrigger : 0
 89    +0x4f4 m_random         : CLRRandom
 90    +0x5e0 m_uliInitializeSpyCookie : _ULARGE_INTEGER 0x0
 91    +0x5e8 m_fInitializeSpyRegistered : 0
 92    +0x5f0 m_pLastSTACtxCookie : (null) 
 93    +0x5f8 m_fGCSpecial     : 0
 94    +0x600 m_pGCFrame       : 0x0000008a`24f7e790 GCFrame
 95    +0x608 m_wCPUGroup      : 0
 96    +0x610 m_pAffinityMask  : 0
 97    +0x618 m_pAllLoggedTypes : (null) 
 98    +0x620 m_gcModeOnSuspension : Volatile<unsigned long>
 99    +0x624 m_activityId     : _GUID {00000000-0000-0000-0000-000000000000}
100    +0x634 m_HijackReturnKind : ff ( RT_Illegal )
101    =00007ffd`027a8b40 dead_threads_non_alloc_bytes : 0
102    +0x638 m_currentPrepareCodeConfig : (null) 
103    +0x640 m_isInForbidSuspendForDebuggerRegion : 0
104    =00007ffd`027ba3d0 s_pfnQueueUserAPC2Proc : (null) 
105    +0x641 m_hasPendingActivation : 0

View Code

+0x020 m_ThreadId : 1表示托管线程的ID。因为我打印的是 ThreadOBJ 为00000199DFD0CAE0 线程的结构。m 表示Management 托管的。

我们可以继续看看 GC Alloc Context,在输出的结构中有这样一行代码:+0x058 m_alloc_context : gc_alloc_context,蓝色的字体,可以点击,相当于执行【dx】命令。

复制代码
1 0:000> dx -r1 (*((coreclr!gc_alloc_context *)0x199dfd0cb38))
2 (*((coreclr!gc_alloc_context *)0x199dfd0cb38))                 [Type: gc_alloc_context]
3     [+0x000] alloc_ptr        : 0x199e440ad60 : 0x0 [Type: unsigned char *]
4     [+0x008] alloc_limit      : 0x199e440c750 : 0x0 [Type: unsigned char *]
5     [+0x010] alloc_bytes      : 50920 [Type: __int64](小对象堆的大小)
6     [+0x018] alloc_bytes_uoh  : 17416 [Type: __int64](大对象堆的大小)
7     [+0x020] gc_reserved_1    : 0x0 [Type: void *]
8     [+0x028] gc_reserved_2    : 0x0 [Type: void *]
9     [+0x030] alloc_count      : 0 [Type: int]

2.3、使用 Windbg 的【k】命令查看非托管函数。

测试源码:Example_7_1_1

这里操作需要切换到主线程上,执行命令【~0s】,然后使用【k】命令。

复制代码
 1 0:010> ~0s
 2 eax=00000000 ebx=00000090 ecx=00000000 edx=00000000 esi=00f3f444 edi=00000000
 3 eip=77c310fc esp=00f3f32c ebp=00f3f38c iopl=0         nv up ei pl nz na po nc
 4 cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00000202
 5 ntdll!NtReadFile+0xc:
 6 77c310fc c22400          ret     24h
 7 
 8 
 9 0:000> k
10  # ChildEBP RetAddr      
11 00 00f3f38c 75dbf25c     ntdll!NtReadFile+0xc
12 01 00f3f38c 70f79b71     KERNELBASE!ReadFile+0xec
13 02 00f3f3fc 716ab275     mscorlib_ni+0x4b9b71
14 03 00f3f428 716ab17b     ...
15WARNING: Frame IP not in any known module. Following frames may be wrong.(无法显示托管函数)16 09 00f3f4b8 71faf036     0x2e9088e
17 0a 00f3f4c4 71fb22da     clr!CallDescrWorkerInternal+0x34
18 0b 00f3f518 71fb859b     clr!CallDescrWorkerWithHandler+0x6b
19 0c 00f3f588 7215b11b     clr!MethodDescCallSite::CallTargetWorker+0x16a
20 0d 00f3f6ac 7215b7fa     clr!RunMain+0x1b3
21 0e 00f3f918 7215b727     clr!Assembly::ExecuteMainMethod+0xf7
22 0f 00f3fdfc 7215b8a8     clr!SystemDomain::ExecuteMainMethod+0x5ef
23 10 00f3fe54 7215b9ce     clr!ExecuteEXE+0x4c
24 11 00f3fe94 72157305     clr!_CorExeMainInternal+0xdc
25 12 00f3fed0 7275fa84     clr!_CorExeMain+0x4d
26 13 00f3ff08 7285e81e     mscoreei!_CorExeMain+0xd6
27 14 00f3ff18 72864338     MSCOREE!ShellShim__CorExeMain+0x9e
28 15 00f3ff30 7636f989     MSCOREE!_CorExeMain_Exported+0x8
29 16 00f3ff30 77c27084     KERNEL32!BaseThreadInitThunk+0x19
30 17 00f3ff8c 77c27054     ntdll!__RtlUserThreadStart+0x2f
31 18 00f3ff9c 00000000     ntdll!_RtlUserThreadStart+0x1b

但是我们可以使用 SOS的【!clrstack】命令显示托管函数。

复制代码
 1 0:000> !clrstack
 2 OS Thread Id: 0xc08 (0)
 3 Child SP       IP Call Site
 4 00f3f3ac 77c310fc [InlinedCallFrame: 00f3f3ac] 
 5 00f3f3a8 70f79b71 DomainNeutralILStubClass.IL_STUB_PInvoke(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr)
 6 00f3f3ac 716ab275 [InlinedCallFrame: 00f3f3ac] Microsoft.Win32.Win32Native.ReadFile(..., Int32, Int32 ByRef, IntPtr)
 7 00f3f410 716ab275 System.IO.__ConsoleStream.ReadFileNative(.., Int32 ByRef) [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 205]
 8 00f3f444 716ab17b System.IO.__ConsoleStream.Read(Byte[], Int32, Int32) [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 134]
 9 00f3f464 70f5e6a3 System.IO.StreamReader.ReadBuffer() [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 595]
10 00f3f474 70f5eb5b System.IO.StreamReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 748]
11 00f3f490 717f3786 System.IO.TextReader+SyncTextReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\textreader.cs @ 363]
12 00f3f4a0 71651845 System.Console.ReadLine() [f:\dd\ndp\clr\src\BCL\system\console.cs @ 1984]
13 00f3f4a8 02e9088e Example_7_1_1.Program.Main(System.String[]) [E:\Visual Studio 2022\...\Example_7_1_1\Program.cs @ 13]
14 00f3f62c 71faf036 [GCFrame: 00f3f62c] 

2.4、使用【kb】命令查看线程栈,提取 ntdll!NtReadFile 的第一个参数。

测试源码:Example_7_1_1

复制代码
 1 0:000> kb
 2  # ChildEBP RetAddr      Args to Child              
 3 00 00f3f38c 75dbf25c     00000090 00000000 00000000 ntdll!NtReadFile+0xc
 4 01 00f3f38c 70f79b71     00000090 02f35d18 00000100 KERNELBASE!ReadFile+0xec
 5 02 00f3f3fc 716ab275     00000000 00f3f444 00000100 mscorlib_ni+0x4b9b71
 6 03 00f3f428 716ab17b     00f3f444 00000000 00000001 mscorlib_ni!System.IO.__ConsoleStream.ReadFileNative+0x89 [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 205] 
 7 04 00f3f454 70f5e6a3     00000100 00000000 02f3a210 mscorlib_ni!System.IO.__ConsoleStream.Read+0x9f [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 134] 
 8 05 00f3f46c 70f5eb5b     00000001 00000000 00f3f55c mscorlib_ni!System.IO.StreamReader.ReadBuffer+0x33 [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 595] 
 9 06 00f3f488 717f3786     00000000 00f3f4d0 00f3f4a0 mscorlib_ni!System.IO.StreamReader.ReadLine+0xe3 [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 748] 
10 07 00f3f498 71651845     00f3f4b8 02e9088e 00000000 mscorlib_ni!System.IO.TextReader.SyncTextReader.ReadLine+0x1a [f:\dd\ndp\clr\src\BCL\system\io\textreader.cs @ 363] 
11 08 00f3f4a0 02e9088e     00000000 0000000b 0000000a mscorlib_ni!System.Console.ReadLine+0x15 [f:\dd\ndp\clr\src\BCL\system\console.cs @ 1984] 
12 WARNING: Frame IP not in any known module. Following frames may be wrong.
13 09 00f3f4b8 71faf036     0116a628 00f3f518 71fb22da 0x2e9088e
14 0a 00f3f4c4 71fb22da     00f3f55c 00f3f508 720a23d0 clr!CallDescrWorkerInternal+0x34
15 0b 00f3f518 71fb859b     00f3f570 02f324bc 00000000 clr!CallDescrWorkerWithHandler+0x6b
16 0c 00f3f588 7215b11b     00f3f664 6a38df42 02d04d78 clr!MethodDescCallSite::CallTargetWorker+0x16a
17 0d 00f3f6ac 7215b7fa     00f3f6f0 00000000 6a38d0f6 clr!RunMain+0x1b3
18 0e 00f3f918 7215b727     00000000 6a38d412 00b70000 clr!Assembly::ExecuteMainMethod+0xf7
19 0f 00f3fdfc 7215b8a8     6a38d7ba 00000000 00000000 clr!SystemDomain::ExecuteMainMethod+0x5ef
20 10 00f3fe54 7215b9ce     6a38d77a 00000000 721572e0 clr!ExecuteEXE+0x4c
21 11 00f3fe94 72157305     6a38d73e 00000000 721572e0 clr!_CorExeMainInternal+0xdc
22 12 00f3fed0 7275fa84     8ee8ef1f 72864330 7275fa20 clr!_CorExeMain+0x4d
23 13 00f3ff08 7285e81e     72864330 72750000 00f3ff30 mscoreei!_CorExeMain+0xd6
24 14 00f3ff18 72864338     72864330 7636f989 00c95000 MSCOREE!ShellShim__CorExeMain+0x9e
25 15 00f3ff30 7636f989     00c95000 7636f970 00f3ff8c MSCOREE!_CorExeMain_Exported+0x8
26 16 00f3ff30 77c27084     00c95000 281a60a3 00000000 KERNEL32!BaseThreadInitThunk+0x19
27 17 00f3ff8c 77c27054     ffffffff 77c462ae 00000000 ntdll!__RtlUserThreadStart+0x2f
28 18 00f3ff9c 00000000     00000000 00000000 00000000 ntdll!_RtlUserThreadStart+0x1b

ntdll!NtReadFile 方法的第一个参数是一个 Handle,我们可以使用【!handle】命令+ f 参数显示详情。Console.ReadLine()方法底层就是 File 的句柄。

复制代码
 1 0:000> !handle 00000090 f
 2 Handle 90
 3   Type             File
 4   Attributes       0
 5   GrantedAccess    0x12019f:
 6          ReadControl,Synch
 7          Read/List,Write/Add,Append/SubDir/CreatePipe,ReadEA,WriteEA,ReadAttr,WriteAttr
 8   HandleCount      2
 9   PointerCount     65531
10   No Object Specific Information available

2.5、我们使用【!clrstack】命令查看托管函数。

测试源码:Example_7_1_1

!clrstack 执行效果

复制代码
 1 0:000> !clrstack
 2 OS Thread Id: 0xc08 (0)
 3 Child SP       IP Call Site
 4 00f3f3ac 77c310fc [InlinedCallFrame: 00f3f3ac] 
 5 00f3f3a8 70f79b71 DomainNeutralILStubClass.IL_STUB_PInvoke(..., Byte*, Int32, Int32 ByRef, IntPtr)
 6 00f3f3ac 716ab275 [InlinedCallFrame: 00f3f3ac] Microsoft.Win32.Win32Native.ReadFile(... Byte*, Int32, Int32 ByRef, IntPtr)
 7 00f3f410 716ab275 System.IO.__ConsoleStream.ReadFileNative(.. Int32 ByRef) [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 205]
 8 00f3f444 716ab17b System.IO.__ConsoleStream.Read(Byte[], Int32, Int32) [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 134]
 9 00f3f464 70f5e6a3 System.IO.StreamReader.ReadBuffer() [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 595]
10 00f3f474 70f5eb5b System.IO.StreamReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 748]
11 00f3f490 717f3786 System.IO.TextReader+SyncTextReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\textreader.cs @ 363]
12 00f3f4a0 71651845 System.Console.ReadLine() [f:\dd\ndp\clr\src\BCL\system\console.cs @ 1984]
13 00f3f4a8 02e9088e Example_7_1_1.Program.Main(System.String[]) [E:\Visual Studio 2022\...\Example_7_1_1\Program.cs @ 13]
14 00f3f62c 71faf036 [GCFrame: 00f3f62c] 

!clrstack -a:显示所有参数和局部变量,关注红色标注的。

复制代码
 1 0:000> !clrstack -a
 2 OS Thread Id: 0xc08 (0)
 3 Child SP       IP Call Site
 4 00f3f3ac 77c310fc [InlinedCallFrame: 00f3f3ac] 
 5 00f3f3a8 70f79b71 DomainNeutralILStubClass.IL_STUB_PInvoke(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr)
 6     PARAMETERS:
 7         <no data>
 8         <no data>
 9         <no data>
10         <no data>
11         <no data>
12 ...(内容太多,就省略了,也没用)
13 
14 00f3f4a8 02e9088e Example_7_1_1.Program.Main(System.String[]) [E:\Visual Studio 2022\..\Example_7_1_1\Program.cs @ 13]
15     PARAMETERS:(参数)
16         args (0x00f3f4b4) = 0x02f324bc(参数)
17 LOCALS:(局部变量)18         0x00f3f4b0 = 0x0000000a
19         0x00f3f4ac = 0x0000000b
20 
21 00f3f62c 71faf036 [GCFrame: 00f3f62c] 

!clrstack -l:显示所有局部变量,关注红色标注的。

复制代码
 1 0:000> !clrstack -l
 2 OS Thread Id: 0xc08 (0)
 3 Child SP       IP Call Site
 4 00f3f3ac 77c310fc [InlinedCallFrame: 00f3f3ac] 
 5 00f3f3a8 70f79b71 DomainNeutralILStubClass.IL_STUB_PInvoke(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr)
 6 ...(内容太多,就省略了,也没用)
 7 
 8 00f3f4a8 02e9088e Example_7_1_1.Program.Main(System.String[]) [E:\Visual Studio 2022\...\Example_7_1_1\Program.cs @ 13]
 9 LOCALS:(只有局部变量)10         0x00f3f4b0 = 0x0000000a
11         0x00f3f4ac = 0x0000000b
12 
13 00f3f62c 71faf036 [GCFrame: 00f3f62c] 

!clrstack -p:显示所有参数,关注红色标注的。

复制代码
 1 0:000> !clrstack -p
 2 OS Thread Id: 0xc08 (0)
 3 Child SP       IP Call Site
 4 00f3f3ac 77c310fc [InlinedCallFrame: 00f3f3ac] 
 5 00f3f3a8 70f79b71 DomainNeutralILStubClass.IL_STUB_PInvoke(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr)
 6     PARAMETERS:
 7         <no data>
 8         <no data>
 9         <no data>
10         <no data>
11         <no data>
12 
13 ...(内容太多,就省略了,也没用)
14 
15 00f3f4a8 02e9088e Example_7_1_1.Program.Main(System.String[]) [E:\Visual Studio 2022\...\Example_7_1_1\Program.cs @ 13]
16     PARAMETERS:(只有参数)
17         args (0x00f3f4b4) = 0x02f324bc
18 
19 00f3f62c 71faf036 [GCFrame: 00f3f62c] 

2.6、使用【~*e】查看所有托管线程栈。

测试源码:Example_7_1_1

~ 命令输出所有线程列表。

复制代码
 1 0:000> ~
 2 .  0  Id: 2074.c08 Suspend: 1 Teb: 00c98000 Unfrozen
 3    1  Id: 2074.2cdc Suspend: 1 Teb: 00c9b000 Unfrozen
 4    2  Id: 2074.3bec Suspend: 1 Teb: 00c9e000 Unfrozen
 5    3  Id: 2074.1a34 Suspend: 1 Teb: 00ca1000 Unfrozen
 6    4  Id: 2074.3858 Suspend: 1 Teb: 00ca4000 Unfrozen
 7    5  Id: 2074.379c Suspend: 1 Teb: 00ca7000 Unfrozen
 8    6  Id: 2074.3088 Suspend: 1 Teb: 00caa000 Unfrozen
 9    7  Id: 2074.2c54 Suspend: 1 Teb: 00cad000 Unfrozen
10    8  Id: 2074.20dc Suspend: 1 Teb: 00cb0000 Unfrozen
11    9  Id: 2074.2014 Suspend: 1 Teb: 00cb3000 Unfrozen
12 # 10  Id: 2074.187c Suspend: 1 Teb: 00cc2000 Unfrozen
13   11  Id: 2074.2b64 Suspend: 1 Teb: 00cb9000 Unfrozen
14   12  Id: 2074.1358 Suspend: 1 Teb: 00cbc000 Unfrozen
15   13  Id: 2074.6e8 Suspend: 1 Teb: 00cbf000 Unfrozen

~* 命令,显示所有线程列表和入口函数。

复制代码
 1 0:000> ~*
 2 .  0  Id: 2074.c08 Suspend: 1 Teb: 00c98000 Unfrozen
 3       Start: 00402bca
 4       Priority: 0  Priority class: 32  Affinity: f
 5    1  Id: 2074.2cdc Suspend: 1 Teb: 00c9b000 Unfrozen
 6       Start: ntdll!TppWorkerThread (77c10c90)
 7       Priority: 0  Priority class: 32  Affinity: f
 8    2  Id: 2074.3bec Suspend: 1 Teb: 00c9e000 Unfrozen
 9       Start: ntdll!TppWorkerThread (77c10c90)
10       Priority: 0  Priority class: 32  Affinity: f
11    3  Id: 2074.1a34 Suspend: 1 Teb: 00ca1000 Unfrozen
12       Start: ntdll!TppWorkerThread (77c10c90)
13       Priority: 0  Priority class: 32  Affinity: f
14    4  Id: 2074.3858 Suspend: 1 Teb: 00ca4000 Unfrozen
15       Start: clr!DebuggerRCThread::ThreadProcStatic (721565d0)
16       Priority: 0  Priority class: 32  Affinity: f
17    5  Id: 2074.379c Suspend: 1 Teb: 00ca7000 Unfrozen
18       Start: clr!Thread::intermediateThreadProc (72074b60)
19       Priority: 2  Priority class: 32  Affinity: f
20    6  Id: 2074.3088 Suspend: 1 Teb: 00caa000 Unfrozen
21       Start: combase!CRpcThreadCache::RpcWorkerThreadEntry (7731bcc0)
22       Priority: 0  Priority class: 32  Affinity: f
23    7  Id: 2074.2c54 Suspend: 1 Teb: 00cad000 Unfrozen
24       Start: ntdll!TppWorkerThread (77c10c90)
25       Priority: 0  Priority class: 32  Affinity: f
26    8  Id: 2074.20dc Suspend: 1 Teb: 00cb0000 Unfrozen
27       Start: ntdll!TppWorkerThread (77c10c90)
28       Priority: 0  Priority class: 32  Affinity: f
29    9  Id: 2074.2014 Suspend: 1 Teb: 00cb3000 Unfrozen
30       Start: clr!Thread::intermediateThreadProc (72074b60)
31       Priority: 0  Priority class: 32  Affinity: f
32 # 10  Id: 2074.187c Suspend: 1 Teb: 00cc2000 Unfrozen
33       Start: ntdll!DbgUiRemoteBreakin (77c6cee0)
34       Priority: 0  Priority class: 32  Affinity: f
35   11  Id: 2074.2b64 Suspend: 1 Teb: 00cb9000 Unfrozen
36       Start: clr!Thread::intermediateThreadProc (72074b60)
37       Priority: 0  Priority class: 32  Affinity: f
38   12  Id: 2074.1358 Suspend: 1 Teb: 00cbc000 Unfrozen
39       Start: clr!Thread::intermediateThreadProc (72074b60)
40       Priority: 0  Priority class: 32  Affinity: f
41   13  Id: 2074.6e8 Suspend: 1 Teb: 00cbf000 Unfrozen
42       Start: clr!Thread::intermediateThreadProc (72074b60)
43       Priority: 0  Priority class: 32  Affinity: f

~*e !clrstack 命令执行的结果,内容太多,折叠了。

复制代码
  1 0:000> ~*e !clrstack
  2 OS Thread Id: 0xc08 (0)
  3 Child SP       IP Call Site
  4 00f3f3ac 77c310fc [InlinedCallFrame: 00f3f3ac] 
  5 00f3f3a8 70f79b71 DomainNeutralILStubClass.IL_STUB_PInvoke(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr)
  6 00f3f3ac 716ab275 [InlinedCallFrame: 00f3f3ac] Microsoft.Win32.Win32Native.ReadFile(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr)
  7 00f3f410 716ab275 System.IO.__ConsoleStream.ReadFileNative(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte[], Int32, Int32, Boolean, Boolean, Int32 ByRef) [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 205]
  8 00f3f444 716ab17b System.IO.__ConsoleStream.Read(Byte[], Int32, Int32) [f:\dd\ndp\clr\src\BCL\system\io\__consolestream.cs @ 134]
  9 00f3f464 70f5e6a3 System.IO.StreamReader.ReadBuffer() [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 595]
 10 00f3f474 70f5eb5b System.IO.StreamReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\streamreader.cs @ 748]
 11 00f3f490 717f3786 System.IO.TextReader+SyncTextReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\textreader.cs @ 363]
 12 00f3f4a0 71651845 System.Console.ReadLine() [f:\dd\ndp\clr\src\BCL\system\console.cs @ 1984]
 13 00f3f4a8 02e9088e Example_7_1_1.Program.Main(System.String[]) [E:\Visual Studio 2022\Source\Projects\AdvancedDebug.NetFramework.Test\Example_7_1_1\Program.cs @ 13]
 14 00f3f62c 71faf036 [GCFrame: 00f3f62c] 
 15 OS Thread Id: 0x2cdc (1)
 16 Unable to walk the managed stack. The current thread is likely not a 
 17 managed thread. You can run !threads to get a list of managed threads in
 18 the process
 19 Failed to start stack walk: 80070057
 20 OS Thread Id: 0x3bec (2)
 21 Unable to walk the managed stack. The current thread is likely not a 
 22 managed thread. You can run !threads to get a list of managed threads in
 23 the process
 24 Failed to start stack walk: 80070057
 25 OS Thread Id: 0x1a34 (3)
 26 Unable to walk the managed stack. The current thread is likely not a 
 27 managed thread. You can run !threads to get a list of managed threads in
 28 the process
 29 Failed to start stack walk: 80070057
 30 OS Thread Id: 0x3858 (4)
 31 Unable to walk the managed stack. The current thread is likely not a 
 32 managed thread. You can run !threads to get a list of managed threads in
 33 the process
 34 Failed to start stack walk: 80070057
 35 OS Thread Id: 0x379c (5)
 36 Child SP       IP Call Site
 37 050cfd48 77c3166c [DebuggerU2MCatchHandlerFrame: 050cfd48] 
 38 OS Thread Id: 0x3088 (6)
 39 Unable to walk the managed stack. The current thread is likely not a 
 40 managed thread. You can run !threads to get a list of managed threads in
 41 the process
 42 Failed to start stack walk: 80070057
 43 OS Thread Id: 0x2c54 (7)
 44 Unable to walk the managed stack. The current thread is likely not a 
 45 managed thread. You can run !threads to get a list of managed threads in
 46 the process
 47 Failed to start stack walk: 80070057
 48 OS Thread Id: 0x20dc (8)
 49 Unable to walk the managed stack. The current thread is likely not a 
 50 managed thread. You can run !threads to get a list of managed threads in
 51 the process
 52 Failed to start stack walk: 80070057
 53 OS Thread Id: 0x2014 (9)
 54 Child SP       IP Call Site
 55 0596f060 77c3166c [GCFrame: 0596f060] 
 56 0596f1b0 77c3166c [HelperMethodFrame: 0596f1b0] System.Threading.Monitor.Enter(System.Object)
 57 0596f220 717f377b System.IO.TextReader+SyncTextReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\textreader.cs @ 363]
 58 0596f230 71651845 System.Console.ReadLine() [f:\dd\ndp\clr\src\BCL\system\console.cs @ 1984]
 59 0596f238 02e90b59 Example_7_1_1.Program.Run1() [E:\Visual Studio 2022\Source\Projects\AdvancedDebug.NetFramework.Test\Example_7_1_1\Program.cs @ 26]
 60 0596f274 02e90a94 Example_7_1_1.Program+c.b__1_0() [E:\Visual Studio 2022\Source\Projects\AdvancedDebug.NetFramework.Test\Example_7_1_1\Program.cs @ 18]
 61 0596f280 70f1d4bb System.Threading.Tasks.Task.InnerInvoke() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2884]
 62 0596f28c 70f1b731 System.Threading.Tasks.Task.Execute() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2498]
 63 0596f2b0 70f1b6fc System.Threading.Tasks.Task.ExecutionContextCallback(System.Object) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2861]
 64 0596f2b4 70eb8604 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 980]
 65 0596f320 70eb8537 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 928]
 66 0596f334 70f1b4b2 System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2827]
 67 0596f398 70f1b357 System.Threading.Tasks.Task.ExecuteEntry(Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2767]
 68 0596f3a8 70f1b29d System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2704]
 69 0596f3ac 70e8eb7d System.Threading.ThreadPoolWorkQueue.Dispatch() [f:\dd\ndp\clr\src\BCL\system\threading\threadpool.cs @ 820]
 70 0596f3fc 70e8e9db System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() [f:\dd\ndp\clr\src\BCL\system\threading\threadpool.cs @ 1161]
 71 0596f61c 71faf036 [DebuggerU2MCatchHandlerFrame: 0596f61c] 
 72 OS Thread Id: 0x187c (10)
 73 Unable to walk the managed stack. The current thread is likely not a 
 74 managed thread. You can run !threads to get a list of managed threads in
 75 the process
 76 Failed to start stack walk: 80070057
 77 OS Thread Id: 0x2b64 (11)
 78 Child SP       IP Call Site
 79 05b2f018 77c3166c [GCFrame: 05b2f018] 
 80 05b2f0f8 77c3166c [HelperMethodFrame_1OBJ: 05b2f0f8] System.Threading.Monitor.Enter(System.Object)
 81 05b2f170 717f377b System.IO.TextReader+SyncTextReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\textreader.cs @ 363]
 82 05b2f180 71651845 System.Console.ReadLine() [f:\dd\ndp\clr\src\BCL\system\console.cs @ 1984]
 83 05b2f188 02e90c31 Example_7_1_1.Program.Run2() [E:\Visual Studio 2022\Source\Projects\AdvancedDebug.NetFramework.Test\Example_7_1_1\Program.cs @ 33]
 84 05b2f1c4 02e90acc Example_7_1_1.Program+c.b__1_1() [E:\Visual Studio 2022\Source\Projects\AdvancedDebug.NetFramework.Test\Example_7_1_1\Program.cs @ 19]
 85 05b2f1d0 70f1d4bb System.Threading.Tasks.Task.InnerInvoke() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2884]
 86 05b2f1dc 70f1b731 System.Threading.Tasks.Task.Execute() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2498]
 87 05b2f200 70f1b6fc System.Threading.Tasks.Task.ExecutionContextCallback(System.Object) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2861]
 88 05b2f204 70eb8604 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 980]
 89 05b2f270 70eb8537 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 928]
 90 05b2f284 70f1b4b2 System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2827]
 91 05b2f2e8 70f1b357 System.Threading.Tasks.Task.ExecuteEntry(Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2767]
 92 05b2f2f8 70f1b29d System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2704]
 93 05b2f2fc 70e8eb7d System.Threading.ThreadPoolWorkQueue.Dispatch() [f:\dd\ndp\clr\src\BCL\system\threading\threadpool.cs @ 820]
 94 05b2f34c 70e8e9db System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() [f:\dd\ndp\clr\src\BCL\system\threading\threadpool.cs @ 1161]
 95 05b2f56c 71faf036 [DebuggerU2MCatchHandlerFrame: 05b2f56c] 
 96 OS Thread Id: 0x1358 (12)
 97 Child SP       IP Call Site
 98 05c6f480 77c3166c [GCFrame: 05c6f480] 
 99 05c6f5d0 77c3166c [HelperMethodFrame: 05c6f5d0] System.Threading.Monitor.Enter(System.Object)
100 05c6f640 717f377b System.IO.TextReader+SyncTextReader.ReadLine() [f:\dd\ndp\clr\src\BCL\system\io\textreader.cs @ 363]
101 05c6f650 71651845 System.Console.ReadLine() [f:\dd\ndp\clr\src\BCL\system\console.cs @ 1984]
102 05c6f658 02e90d41 Example_7_1_1.Program.Run3() [E:\Visual Studio 2022\Source\Projects\AdvancedDebug.NetFramework.Test\Example_7_1_1\Program.cs @ 40]
103 05c6f694 02e90cb4 Example_7_1_1.Program+c.b__1_2() [E:\Visual Studio 2022\Source\Projects\AdvancedDebug.NetFramework.Test\Example_7_1_1\Program.cs @ 20]
104 05c6f6a0 70f1d4bb System.Threading.Tasks.Task.InnerInvoke() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2884]
105 05c6f6ac 70f1b731 System.Threading.Tasks.Task.Execute() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2498]
106 05c6f6d0 70f1b6fc System.Threading.Tasks.Task.ExecutionContextCallback(System.Object) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2861]
107 05c6f6d4 70eb8604 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 980]
108 05c6f740 70eb8537 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\executioncontext.cs @ 928]
109 05c6f754 70f1b4b2 System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2827]
110 05c6f7b8 70f1b357 System.Threading.Tasks.Task.ExecuteEntry(Boolean) [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2767]
111 05c6f7c8 70f1b29d System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() [f:\dd\ndp\clr\src\BCL\system\threading\Tasks\Task.cs @ 2704]
112 05c6f7cc 70e8eb7d System.Threading.ThreadPoolWorkQueue.Dispatch() [f:\dd\ndp\clr\src\BCL\system\threading\threadpool.cs @ 820]
113 05c6f81c 70e8e9db System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() [f:\dd\ndp\clr\src\BCL\system\threading\threadpool.cs @ 1161]
114 05c6fa3c 71faf036 [DebuggerU2MCatchHandlerFrame: 05c6fa3c] 
115 OS Thread Id: 0x6e8 (13)
116 Child SP       IP Call Site
117 GetFrameContext failed: 1
118 00000000 00000000 

View Code

2.7、使用【!dumpstack】命令查看托管和非托管的线程栈。

测试源码:Example_7_1_1

需要切换到主线程,然后执行命令【!dumpstack】

复制代码
 1 0:000> !dumpstack
 2 OS Thread Id: 0x710 (0)
 3 Current frame: ntdll!NtReadFile+0xc
 4 ChildEBP RetAddr  Caller, Callee
 5 00daef38 75dbf25c KERNELBASE!ReadFile+0xec, calling ntdll!NtReadFile
 ......
66 00daf7d0 71fb9704 clr!Alloc+0x142, calling clr!_EH_epilog3
67 00daf7d8 71fc3cbc clr!HndLogSetEvent+0x15, calling clr!GCEventEnabledSetGCHandle
68 00daf9b0 77c052fe ntdll!RtlAllocateHeap+0x3e, calling ntdll!RtlpAllocateHeapInternal
69 00daf9d0 7213ca2c clr!EEStartupHelper+0xabb, calling clr!_EH_epilog3
70 00daf9d4 7213b55b clr!EEStartup+0xb8, calling clr!_SEH_epilog4
71 00dafa0c 7215b8a8 clr!ExecuteEXE+0x4c, calling clr!SystemDomain::ExecuteMainMethod
72 00dafa64 7215b9ce clr!_CorExeMainInternal+0xdc, calling clr!ExecuteEXE
73 00dafaa4 72157305 clr!_CorExeMain+0x4d, calling clr!_CorExeMainInternal
74 00dafae0 7275fa84 mscoreei!_CorExeMain+0xd6
75 00dafafc 7636f4c4 KERNEL32!GetProcAddressStub+0x14, calling KERNELBASE!GetProcAddressForCaller
76 00dafb18 7285e81e MSCOREE!ShellShim__CorExeMain+0x9e
77 00dafb28 72864338 MSCOREE!_CorExeMain_Exported+0x8, calling MSCOREE!ShellShim__CorExeMain
78 00dafb30 7636f989 KERNEL32!BaseThreadInitThunk+0x19
79 00dafb40 77c27084 ntdll!__RtlUserThreadStart+0x2f
80 00dafb9c 77c27054 ntdll!_RtlUserThreadStart+0x1b, calling ntdll!__RtlUserThreadStart

我们可以使用【!dumpstack -ee】只查看托管栈。

复制代码
 1 0:000> !dumpstack -ee
 2 OS Thread Id: 0x710 (0)
 3 Current frame: 
 4 ChildEBP RetAddr  Caller, Callee
 5 00daef9c 70f79b71 (MethodDesc 70c438c4 +0x69 DomainNeutralILStubClass.IL_STUB_PInvoke(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr))
 6 00daefc8 70f79b71 (MethodDesc 70c438c4 +0x69 DomainNeutralILStubClass.IL_STUB_PInvoke(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte*, Int32, Int32 ByRef, IntPtr))
 7 00daf00c 716ab275 (MethodDesc 70cf7a24 +0x89 System.IO.__ConsoleStream.ReadFileNative(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte[], Int32, Int32, Boolean, Boolean, Int32 ByRef))
 8 00daf038 716ab17b (MethodDesc 70cf7a4c +0x9f System.IO.__ConsoleStream.Read(Byte[], Int32, Int32))
 9 00daf064 70f5e6a3 (MethodDesc 70c2d964 +0x33 System.IO.StreamReader.ReadBuffer())
10 00daf07c 70f5eb5b (MethodDesc 70c2d96c +0xe3 System.IO.StreamReader.ReadLine())
11 00daf098 717f3786 (MethodDesc 70d22100 +0x1a System.IO.TextReader+SyncTextReader.ReadLine())
12 00daf0a8 71651845 (MethodDesc 70c19e00 +0x15 System.Console.ReadLine())
13 00daf0b0 0144088e (MethodDesc 01184d78 +0x46 Example_7_1_1.Program.Main(System.String[]))

2.8、使用【!eestack】和【~*e !dumpstack】查看所有的线程栈。

测试源码:Example_7_1_1

复制代码
1 0:000> !eestack
2 ---------------------------------------------
3 Thread   0
4 Current frame: ntdll!NtReadFile+0xc
5 ChildEBP RetAddr  Caller, Callee
6 。。。。
7 内容太多,省略了。

~*e !dumpstack执行效果

复制代码
1 0:000> ~*e !dumpstack
2 OS Thread Id: 0x710 (0)
3 Current frame: ntdll!NtReadFile+0xc
4 ChildEBP RetAddr  Caller, Callee
5 00daef38 75dbf25c KERNELBASE!ReadFile+0xec, calling ntdll!NtReadFile
6 ......
7 内容太多,省略了。

eestack 命令,可以增加参数,比如:-short,我们可以使用 SOS 的帮助命令查看某个命令的解释,比如:eestack。

复制代码
 1 0:010> !sos.help eestack
 2 -------------------------------------------------------------------------------
 3 !EEStack [-short] [-EE]
 4 
 5 This command runs !DumpStack on all threads in the process. The -EE option is 
 6 passed directly to !DumpStack. The -short option tries to narrow down the 
 7 output to "interesting" threads only, which is defined by
 8 
 9 1) The thread has taken a lock.(可以显示具有锁的线程)
10 2) The thread has been "hijacked" in order to allow a garbage collection.(可以显示被"劫持"的线程)
11 3) The thread is currently in managed code.(可以显示托管线程)
12 
13 See the documentation for !DumpStack for more info.

四、总结

终于写完了,今天这篇文章是第六篇。我们了解了线程和线程调用栈,那调试起来我们就知道如何开始了,知道如何查找参数和局部变量,知道线程栈地址,哦我们可以输出线程栈的内容,对值类型和引用类型了解的也更深入了,当然对线程了解也更深入了,终于做到知其一也知其二了。其实这些知识是相互作用的,不是独立的,任何一个环节的调试,都需要很多技巧。好了,不说了,不忘初心,继续努力,希望老天不要辜负努力的人。

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