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,但是没有办法显示托管函数,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

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 }
1.2、example_7_1_2(特别说明,这个项目是 net 7.0)

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 }
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
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。
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。
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。
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。

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
+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。
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。
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 ... 15 warning: 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。
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
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。
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
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。
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。
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。
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。
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。
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。

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
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】
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。
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
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
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。
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,今天这篇文章是第七篇。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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