如何显示当前内核模式上下文的用户模式堆栈？

Question

假设我在系统调用或从用户模式启动的 IOCTL 期间闯入内核调试器。我想查看完整的堆栈 - 从用户模式开始并切换到内核模式。

我知道一些片段：

• 我可以用!process 0 0 列出所有进程，并查看其中的线程。或者，使用!dml_proc 打瞌睡。
• 如果我知道当前的用户模式线程，我可以切换到它并查看整个开始：!thread <usermode_thread> 15。

但是我该如何将它们联系在一起呢？具体来说：

1. 我如何知道当前的用户模式线程？
2. 我可以通过编程方式检索它，这样我就可以拥有一个单行代码!thread <some_magic> 15？

Answer 1

WinDbg 在伪寄存器@$thread 中跟踪用户模式和内核模式中的当前线程，以及伪寄存器@$proc 中的当前进程。

查看当前线程堆栈：!thread @$thread 0x1f.
这是完整的堆栈，从 _RtlUserThreadStart 到最后一个 api，如果线程放弃执行，通常是 SwapContext()。

查看当前进程及其所有线程的堆栈：!process @$proc 0x1f

这是两个命令吐出的完整的当前线程堆栈

!proc @$proc 1f 以及 !thread @$thread 1f

第一个将打印特定进程的所有线程的调用堆栈
第二个将打印当前正在运行的特定线程的调用堆栈

您可以在 Threads 输出的第一行看到等待状态为 RUNNING

:\>head -2 sample.txt
kd> !process @$proc 0x17
PROCESS 84efc748  SessionId: 0  Cid: 0470    Peb: 7ffdc000  ParentCid: 01e8

:\>wc -l sample.txt
517 sample.txt

:\>grep THREAD  sample.txt
        THREAD 84efcb60  Cid 0470.0474  Teb: 7ffdf000 Win32Thread: ff9f1c00 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 84f166b8  Cid 0470.0478  Teb: 7ffde000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Alertable
        THREAD 85303820  Cid 0470.0490  Teb: 7ffd9000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 85307bb0  Cid 0470.0494  Teb: 7ffd8000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 853064e8  Cid 0470.0498  Teb: 7ffd7000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 84e71d48  Cid 0470.049c  Teb: 7ffd6000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 8530eb80  Cid 0470.04a8  Teb: 7ffda000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 85371030  Cid 0470.0538  Teb: 7ffd4000 Win32Thread: 00000000 WAIT: (WrQueue) UserMode Alertable
        THREAD 8538ea08  Cid 0470.0588  Teb: 7ffad000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 853d6310  Cid 0470.05a4  Teb: 7ffaa000 Win32Thread: 00000000 WAIT: (WrQueue) UserMode Alertable
        THREAD 8540fa78  Cid 0470.06bc  Teb: 7ffaf000 Win32Thread: 00000000 WAIT: (UserRequest) UserMode Non-Alertable
        THREAD 84173030  Cid 0470.0740  Teb: 7ffa6000 Win32Thread: 00000000 WAIT: (WrQueue) UserMode Non-Alertable
        THREAD 84f77990  Cid 0470.0174  Teb: 7ffdd000 Win32Thread: 00000000 RUNNING on processor 0
THREAD 84f77990  Cid 0470.0174  Teb: 7ffdd000 Win32Thread: 00000000 RUNNING on processor 0

:\>grep !thread sample.txt
kd> !thread @$thread 1f

:\>grep -A 2 !thread sample.txt
kd> !thread @$thread 1f
THREAD 84f77990  Cid 0470.0174  Teb: 7ffdd000 Win32Thread: 00000000 RUNNING on processor 0
Not impersonating

:\>

在 NtDeviceIoControlFile 上中断的当前正在运行的线程的完整调用堆栈

kd> !thread @$thread 1f
THREAD 84f77990  Cid 0470.0174  Teb: 7ffdd000 Win32Thread: 00000000 RUNNING on processor 0
Not impersonating
DeviceMap                 919b0008
Owning Process            84efc748       Image:         svchost.exe
Attached Process          N/A            Image:         N/A
Wait Start TickCount      49461          Ticks: 1 (0:00:00:00.010)
Context Switch Count      659            IdealProcessor: 0             
UserTime                  00:00:00.040
KernelTime                00:00:03.314
Win32 Start Address ntdll!TppWorkerThread (0x770403e7)
Stack Init 8c0e3fd0 Current 8c0e3bf8 Base 8c0e4000 Limit 8c0e1000 Call 00000000
Priority 8 BasePriority 8 PriorityDecrement 0 IoPriority 2 PagePriority 5

ChildEBP RetAddr  
8c0e3d04 8283787a nt!NtDeviceIoControlFile
8c0e3d04 770570b4 nt!KiFastCallEntry+0x12a (FPO: [0,3] TrapFrame @ 8c0e3d34)
0292f518 77055864 ntdll!KiFastSystemCallRet (FPO: [0,0,0])
0292f51c 76dd14c9 ntdll!ZwDeviceIoControlFile+0xc (FPO: [10,0,0])
0292f560 76dd15f9 NSI!NsiIoctl+0x5d (FPO: [Non-Fpo])
0292f584 76dd15c7 NSI!NsiEnumerateObjectsAllParametersEx+0x23 (FPO: [Non-Fpo])
0292f5d0 718718e2 NSI!NsiEnumerateObjectsAllParameters+0x79 (FPO: [Non-Fpo])
0292f620 71871858 ncsi!CNcsiNsiTable::AllocateAndGetTable+0x51 (FPO: [Non-Fpo])
0292f644 718717c6 ncsi!UpdateInterfaceStatsByFamily+0xb0 (FPO: [Non-Fpo])
0292f664 71871e49 ncsi!UpdateInterfaceStats+0x26 (FPO: [Non-Fpo])
0292f694 71871d4e ncsi!PassiveProbe+0x6f (FPO: [Non-Fpo])
0292f6f4 718715d5 ncsi!NcsiUpdateConnectivityStatusList+0x4a1 (FPO: [Non-Fpo])
0292f6f8 7704112c ncsi!NcsiUpdateConnectivityStatusListTimer+0x5 (FPO: [3,0,0])
0292f71c 77040842 ntdll!TppTimerpExecuteCallback+0x10f (FPO: [Non-Fpo])
0292f87c 756f3c45 ntdll!TppWorkerThread+0x572 (FPO: [Non-Fpo])
0292f888 770737f5 kernel32!BaseThreadInitThunk+0xe (FPO: [Non-Fpo])
0292f8c8 770737c8 ntdll!__RtlUserThreadStart+0x70 (FPO: [Non-Fpo])
0292f8e0 00000000 ntdll!_RtlUserThreadStart+0x1b (FPO: [Non-Fpo])