Software Diagnostics Library

Similar to unmanaged user space handled exceptions residue we can see similar one on raw stacks of .NET CLR threads. Here are some typical fragments (x86, CLR 4 has similar residue):

[...]
09c8e1e0  79ef2dee mscorwks!ExInfo::Init+0x41
09c8e1e4  00004000
09c8e1e8  79f088cc mscorwks!`string'
09c8e1ec  79f088c2 mscorwks!ExInfo::UnwindExInfo+0x14d
09c8e1f0  08f68728
09c8e1f4  95f5b898
09c8e1f8  09c8e1a4
09c8e1fc  09c8e92c
09c8e200  7a34d0d8 mscorwks!GetManagedNameForTypeInfo+0x22b02
09c8e204  79f091ee mscorwks!COMPlusCheckForAbort+0x15
09c8e208  00000000
09c8e20c  0aada664
09c8e210  0aaabff4
09c8e214  00000000
09c8e218  09c8eeec
09c8e21c  074c1f23
09c8e220  09c8ef0c
09c8e224  79f091cb mscorwks!JIT_EndCatch+0x16
09c8e228  09c8ef0c
09c8e22c  09c8eeec
09c8e230  074c1f23
09c8e234  09c8e25c
09c8e238  0009c108
09c8e23c  09c8e460
09c8e240  09c8e5c4
09c8e244  00071d88
09c8e248  08f68728
09c8e24c  79e734c4 mscorwks!ClrFlsSetValue+0x57
09c8e250  95f5b8e4
09c8e254  0aada634
09c8e258  08f68728
09c8e25c  0aada90c
09c8e260  0aaabff4
09c8e264  00000002
09c8e268  09c8e304
09c8e26c  0aada664
09c8e270  00000000
09c8e274  09c8ef0c
09c8e278  09c8e234
09c8e27c  074c1f13
09c8e280  00000000
09c8e284  08f688a0
09c8e288  09c8e234
09c8e28c  79f00c0b mscorwks!Thread::ReturnToContext+0x4e2
09c8e290  0aada90c
09c8e294  09c8eef4
09c8e298  09c8e2bc
09c8e29c  79f08eb8 mscorwks!EEJitManager::ResumeAtJitEH+0x28
09c8e2a0  09c8e460
09c8e2a4  074c1ed8
09c8e2a8  074b41a8
09c8e2ac  00000000
09c8e2b0  08f68728
09c8e2b4  00000000
09c8e2b8  09c8e410
09c8e2bc  09c8e3c8
09c8e2c0  79f08df5 mscorwks!COMPlusUnwindCallback+0x7c3
09c8e2c4  09c8e460
09c8e2c8  074b41a8
09c8e2cc  00000000
09c8e2d0  08f68728
09c8e2d4  00000000
09c8e2d8  0009c108
09c8e2dc  09c8e410
09c8e2e0  09c8e5c4
09c8e2e4  074b41a8
09c8e2e8  09c8e3a4
09c8e2ec  79e734c4 mscorwks!ClrFlsSetValue+0x57
09c8e2f0  95f5b984
09c8e2f4  0009c128
09c8e2f8  09c8e3a4
09c8e2fc  00000000
09c8e300  00000000
09c8e304  00000002
[...]
09c8e4e4  00000000
09c8e4e8  79f09160 mscorwks!_CT??_R0H+0x34b4
09c8e4ec  ffffffff
09c8e4f0  73792e2f msvcr80!_getptd+0x6
09c8e4f4  ffffffff
09c8e4f8  737b7a78 msvcr80!__FrameUnwindToState+0xd9
09c8e4fc  737b7a5e msvcr80!__FrameUnwindToState+0xbf
09c8e500  95f5bc05
09c8e504  e06d7363
09c8e508  1fffffff
09c8e50c  19930522
09c8e510  ffffffff
09c8e514  ffffffff
09c8e518  09c8e500
09c8e51c  09c8e554
09c8e520  09c8e5a8
09c8e524  73798cd9 msvcr80!_except_handler4
09c8e528  efbc0d3d
09c8e52c  fffffffe
09c8e530  737b7a5e msvcr80!__FrameUnwindToState+0xbf
09c8e534  737b89cb msvcr80!__InternalCxxFrameHandler+0x6d
09c8e538  09c8eab0
09c8e53c  09c8e6a0
09c8e540  79f09160 mscorwks!_CT??_R0H+0x34b4
09c8e544  ffffffff
09c8e548  00000000
09c8e54c  00000000
09c8e550  00000000
09c8e554  09c8e590
09c8e558  737b8af1 msvcr80!__CxxFrameHandler3+0x26
09c8e55c  09c8e600
09c8e560  09c8eab0
09c8e564  01010101
09c8e568  09000000
09c8e56c  09c8f160
09c8e570  07540c00
09c8e574  00071d88
09c8e578  08e65d48
09c8e57c  09c8e5ec
09c8e580  074c1ec8
09c8e584  00000024
09c8e588  00000001
09c8e58c  0009c108
09c8e590  08f68728
09c8e594  00000000
09c8e598  00000000
09c8e59c  09c8eb38
09c8e5a0  00000000
09c8e5a4  09c8e6a0
09c8e5a8  09c8f15c
09c8e5ac  09c8f15c
09c8e5b0  09c8eb38
09c8e5b4  95f5bf28
09c8e5b8  09c8e8f4
09c8e5bc  79e84bf2 mscorwks!Thread::StackWalkFrames+0xb8
09c8e5c0  08f68728
09c8e5c4  09c8ea40
09c8e5c8  79e84bf2 mscorwks!Thread::StackWalkFrames+0xb8
09c8e5cc  09c8e5ec
09c8e5d0  79f07d64 mscorwks!COMPlusUnwindCallback
09c8e5d4  09c8ea40
09c8e5d8  00000005
09c8e5dc  00000000
09c8e5e0  08f68728
09c8e5e4  08f688a0
09c8e5e8  08f68728
09c8e5ec  09c8ec20
09c8e5f0  00000000
09c8e5f4  09c8ecbc
09c8e5f8  09c8ecc0
09c8e5fc  09c8ecc4
09c8e600  09c8ecc8
09c8e604  09c8eccc
09c8e608  09c8ecd0
09c8e60c  09c8ecd4
09c8e610  09c8eeec
09c8e614  09c8ecd8
09c8e618  09c8ecd8
09c8e61c  00000024
09c8e620  00000000
09c8e624  0009c108
09c8e628  08f68728
09c8e62c  00000000
09c8e630  00000000
09c8e634  79e71ba4 mscorwks!Thread::CatchAtSafePoint
09c8e638  00000000
09c8e63c  79e71ba4 mscorwks!Thread::CatchAtSafePoint
09c8e640  09c8f15c
09c8e644  09c8f15c
09c8e648  00000000
09c8e64c  95f5bcc0
09c8e650  09c8e988
09c8e654  79e84bf2 mscorwks!Thread::StackWalkFrames+0xb8
09c8e658  09c8ea40
09c8e65c  79e84bf2 mscorwks!Thread::StackWalkFrames+0xb8
09c8e660  09c8e680
09c8e664  79f07957 mscorwks!COMPlusThrowCallback
09c8e668  09c8ea40
09c8e66c  00000000
09c8e670  00000000
09c8e674  0aada90c
09c8e678  09c8ea40
09c8e67c  79e84bff mscorwks!Thread::StackWalkFrames+0xc5
09c8e680  09c8ec20
09c8e684  00000000
09c8e688  09c8ecbc
09c8e68c  09c8ecc0
09c8e690  09c8ecc4
09c8e694  09c8ecc8
[...]
09c8e8f0  95f5b264
09c8e8f4  09c8e914
09c8e8f8  79f07d5e mscorwks!UnwindFrames+0x62
09c8e8fc  79f07d64 mscorwks!COMPlusUnwindCallback
09c8e900  09c8ea40
09c8e904  00000005
09c8e908  00000000
09c8e90c  09c8ef6c
09c8e910  08f68728
09c8e914  09c8e9a4
09c8e918  79f089cc mscorwks!COMPlusAfterUnwind+0x97
09c8e91c  08f68728
09c8e920  09c8ea40
09c8e924  00000001
09c8e928  00000000
09c8e92c  09c8ef6c
09c8e930  79f0a3d9 mscorwks!COMPlusNestedExceptionHandler
09c8e934  09c8f160
09c8e938  00000000
09c8e93c  00000000
09c8e940  cccccccc
[...]

Sometimes we can see ‘ExecuteHandler’ calls if they were not overwritten:

[...]
09d2e6e0  00000000
09d2e6e4  00000720
09d2e6e8  77c41039 ntdll!ExecuteHandler2+0x26
09d2e6ec  09d2e7c8
09d2e6f0  09d2eb60
09d2e6f4  09d2e7e4
09d2e6f8  09d2e7a4
09d2e6fc  09d2eb60
09d2e700  77c4104d ntdll!ExecuteHandler2+0x3a
09d2e704  09d2eb60
09d2e708  09d2e7b0
09d2e70c  77c4100b ntdll!ExecuteHandler+0x24
09d2e710  09d2e7c8
09d2e714  00000001
09d2e718  09d2e6b0
09d2e71c  09d2e7a4
09d2e720  09d2e784
09d2e724  76545ac9 kernel32!_except_handler4
[...]

If there are such traces they can be visible as Caller-n-Callee pattern:

0:011> !DumpStack
OS Thread Id: 0x3cc (11)
Current frame: ntdll!KiFastSystemCallRet
ChildEBP RetAddr  Caller, Callee
09d2e690 77c40690 ntdll!ZwWaitForMultipleObjects+0xc
09d2e694 76577e09 kernel32!WaitForMultipleObjectsEx+0x11d, calling ntdll!NtWaitForMultipleObjects
09d2e6d8 76578101 kernel32!WaitForMultipleObjectsEx+0x33, calling ntdll!RtlActivateActivationContextUnsafeFast
09d2e6e4 77c41039 ntdll!ExecuteHandler2+0×26
09d2e708 77c4100b ntdll!ExecuteHandler+0×24, calling ntdll!ExecuteHandler2
09d2e730 6baa516a clr!WaitForMultipleObjectsEx_SO_TOLERANT+0×56, calling kernel32!WaitForMultipleObjectsEx
09d2e794 6baa4f98 clr!Thread::DoAppropriateAptStateWait+0×4d, calling clr!WaitForMultipleObjectsEx_SO_TOLERANT
09d2e7b4 6baa4dd8 clr!Thread::DoAppropriateWaitWorker+0×17d, calling clr!Thread::DoAppropriateAptStateWait
09d2e848 6baa4e99 clr!Thread::DoAppropriateWait+0×60, calling clr!Thread::DoAppropriateWaitWorker
09d2e8b4 6baa4f17 clr!CLREvent::WaitEx+0×106, calling clr!Thread::DoAppropriateWait
09d2e8e0 6baa484b clr!CLRGetTickCount64+0×6b, calling clr!_allmul
09d2e908 6ba4d409 clr!CLREvent::Wait+0×19, calling clr!CLREvent::WaitEx
[…]

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

This entry was posted on Monday, October 17th, 2011 at 10:14 pm and is filed under .NET Debugging, Crash Dump Analysis, Crash Dump Patterns, Debugging. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.