我的应用程序出现崩溃,并在错误信息中显示以下的调用堆栈(来自WinDbg):
ntdll!ZwWaitForMultipleObjects+0xa
KERNELBASE!WaitForMultipleObjectsEx+0xe8
kernel32!WaitForMultipleObjectsExImplementation+0xb3
clr!WaitForMultipleObjectsEx_SO_TOLERANT+0x91
clr!Thread::DoAppropriateAptStateWait+0x56
clr!Thread::DoAppropriateWaitWorker+0x1b1
clr!Thread::DoAppropriateWait+0x73
clr!CLREvent::WaitEx+0xc1
clr!CLREventWaitWithTry+0x5c
clr! ?? ::FNODOBFM::`string'+0x6286a
clr!AssemblySecurityDescriptor::UpgradePEFileEvidenceToAssemblyEvidence+0x11d
clr!Assembly::ExecuteMainMethod+0xcb
clr!SystemDomain::ExecuteMainMethod+0x452
clr!ExecuteEXE+0x43
clr!CorExeMainInternal+0xc4
clr!CorExeMain+0x15
mscoreei!CorExeMain+0x41
mscoree!CorExeMain_Exported+0x57
kernel32!BaseThreadInitThunk+0xd
ntdll!RtlUserThreadStart+0x1d
这是一个托管应用程序,据WinDbg显示,该应用程序有61个进程/线程在运行。在WinDbg中,当输入!threads时,它会显示未找到导出线程。它没有说这是什么错误引起的(在Visual Studio 2010中,它说是NullReferenceException)。
我已经被搞疯了,我以为这与USB串口控制器有关,但我把它放到另一个应用程序中,它仍然会崩溃(虽然不像之前那样严重,而是大约80%)。
这个异常/错误完全让我无法理解,我无法找出如何修复它。
更新:使用.loadby sos clr:
0:000> !threads
ThreadCount: 23
UnstartedThread: 0
BackgroundThread: 17
PendingThread: 0
DeadThread: 4
Hosted Runtime: no
PreEmptive Lock
ID OSID ThreadOBJ State GC GC Alloc Context Domain Count APT Exception
0 1 1678 00000000023dbfe0 201a228 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 MTA
2 2 1b4 000000000243a230 b228 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 MTA (Finalizer)
XXXX 4 0000000004039010 19820 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 MTA
XXXX 5 0000000004099f50 19820 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 Ukn
7 6 148c 00000000024bc5f0 228 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 Ukn
9 7 19bc 00000000040e1420 b028 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 MTA
4 8 1ba8 00000000040a4ff0 228 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 Ukn
10 9 17f8 00000000040ab760 8b228 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 MTA
11 a 10a0 00000000040b4890 87028 Enabled 000000000f411ff0:000000000f4120e0 00000000004a5510 0 STA System.ServiceModel.CommunicationObjectFaultedException (000000000f403608)
XXXX 3 00000000040b58a0 19820 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 Ukn
XXXX b 0000000007e03220 19820 Enabled 0000000000000000:0000000000000000 00000000004a5510 0 Ukn
26 c b48 0000000007eee6b0 2000228 Enabled 000000000f417780:000000000f4180e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f35c0f8)
27 d 22c 0000000007e149c0 80228 Enabled 000000000f3d18f8:000000000f3d20e0 00000000004a5510 1 Ukn System.NullReferenceException (000000000f35a0f8)
40 16 116c 0000000027db3db0 80228 Enabled 000000000f419300:000000000f41a0e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f34c0f8)
38 17 18c8 0000000027db44c0 2000228 Enabled 000000000f4054d8:000000000f4060e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f34a0f8)
37 15 a78 0000000027db36a0 2000228 Enabled 000000000f40bac8:000000000f40c0e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f3540f8)
41 13 112c 0000000027db2880 2000228 Enabled 000000000f415c00:000000000f4160e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f34e0f8)
30 f 938 000000000415b590 80228 Enabled 000000000f4081f0:000000000f40a0e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f3520f8)
36 14 4f0 0000000027db2f90 80228 Enabled 000000000f412f70:000000000f4140e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f3500f8)
28 10 88c 0000000007ef2500 2000228 Enabled 000000000f3e9238:000000000f3ea0e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f35e0f8)
31 11 180c 0000000027aac5a0 80228 Enabled 000000000f41bb28:000000000f41c0e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f3580f8)
33 12 1b2c 0000000027db2170 2000228 Enabled 000000000f3bb238:000000000f3bc0e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f3560f8)
29 e 1968 0000000007eeca60 2000228 Enabled 000000000f3e2cc8:000000000f3e40e0 00000000004a5510 0 Ukn System.NullReferenceException (000000000f3600f8)
*** WARNING: Unable to verify checksum for System.ni.dll
*** WARNING: Unable to verify checksum for System.Transactions.ni.dll
捕获了通信异常(当WCF主机未启动时发生,并且在断开硬件连接时可能会发生)。我怀疑这不是导致崩溃的原因,因为在Visual Studio中它总是崩溃并显示NullReferenceException,但没有可用的CallStack / Disassembly。
例如,当我查看线程OSID 22C(其中一个NullReferenceException)时,CallStack如下:
ntdll!ZwWaitForSingleObject+0xa
KERNELBASE!WaitForSingleObjectEx+0x79
clr!Thread::LeaveRuntimeNoThrow+0x7c
clr!Thread::LeaveRuntimeNoThrow+0xec
clr!CLREvent::WaitEx+0x5e
clr!Thread::WaitSuspendEventsHelper+0xcf
clr!Thread::WaitSuspendEvents+0x11
clr! ?? ::FNODOBFM::`string'+0x628f1
clr!Thread::RareDisablePreemptiveGC+0xfa
clr!GCHolderEEInterface<0,1,0>::~GCHolderEEInterface<0,1,0>+0x19
clr!Debugger::SendLogMessage+0xb7
clr!DebugDebugger::Log+0x223
System_ni+0x2b5f71
System_ni+0x243c3a
System_ni+0x714851
System_ni+0x70d7a7
System_Transactions_ni!_dyn_tls_init_callback <PERF> (System_Transactions_ni+0x738ec)
System_Transactions_ni!_dyn_tls_init_callback <PERF> (System_Transactions_ni+0x72b13)
clr!CallDescrWorker+0x84
clr!CallDescrWorkerWithHandler+0xa9
0:027> ~40
40 Id: 1278.116c Suspend: 0 Teb: 000007ff`ffbfa000 Unfrozen
Start: Loading symbols for 00000000`709b0000 msvcr100.dll -> msvcr100.dll
msvcr100!endthreadex+0x60 (00000000`709d1dbc)
Priority: 0 Priority class: 32 Affinity: f
0:027> !pe
Exception object: 000000000f35a0f8
Exception type: System.NullReferenceException
Message: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
InnerException: <none>
StackTrace (generated):
SP IP Function
000000002759FC60 0000000000000001 mscorlib_ni!System.StubHelpers.StubHelpers.CheckCollectedDelegateMDA(IntPtr)+0x2
StackTraceString: <none>
HResult: 80004003
!threads
命令,您是否在运行该命令之前先加载了 SOS?(通过.loadby sos clr
用于 .NET4 或.loadby sos mscorwks
用于 .NET2)? - Iridium!pe
和!clrstack -a
来显示带有参数(包括传递给MDA的IntPtr
)的调用堆栈。 - Iridium