Question

我看到了终结器线程的以下调用堆栈。在终结器中调用WaitForSingleObject是否正常？无论如何，我可以确定它是否没有陷入僵局或等待很长时间？

0:009> k
Child-SP          RetAddr           Call Site
00000000`0a56e5c8 000007fe`fd5010dc ntdll!NtWaitForSingleObject+0xa
00000000`0a56e5d0 000007fe`fdfabeb5 KERNELBASE!WaitForSingleObjectEx+0x79
00000000`0a56e670 000007fe`fe04a576 rpcrt4!UTIL_GetOverlappedResultEx+0x45
00000000`0a56e6b0 000007fe`fdfaf0dd rpcrt4!WS_SyncRecv+0xf6
00000000`0a56e720 000007fe`fdfe7a29 rpcrt4!OSF_CCONNECTION::TransSendReceive+0x18d
00000000`0a56e780 000007fe`fdfa7f61 rpcrt4!OSF_CCONNECTION::SendBindPacket+0xa5c
00000000`0a56e930 000007fe`fdfa8e27 rpcrt4!OSF_CCONNECTION::ActuallyDoBinding+0xc1
00000000`0a56e9d0 000007fe`fdfa8bb6 rpcrt4!OSF_CCONNECTION::OpenConnectionAndBind+0x207
00000000`0a56ea90 000007fe`fdfa8acd rpcrt4!OSF_CCALL::BindToServer+0xc6
00000000`0a56eb40 000007fe`fdfadaeb rpcrt4!OSF_BINDING_HANDLE::InitCCallWithAssociation+0xa5
00000000`0a56eba0 000007fe`fdfad9d0 rpcrt4!OSF_BINDING_HANDLE::AllocateCCall+0x102
00000000`0a56ecd0 000007fe`fdfc74eb rpcrt4!OSF_BINDING_HANDLE::NegotiateTransferSyntax+0x30
00000000`0a56ed20 000007fe`ff462271 rpcrt4!I_RpcNegotiateTransferSyntax+0x9f
00000000`0a56edb0 000007fe`ff45d185 ole32!CRpcChannelBuffer::NegotiateSyntax+0x69 
00000000`0a56ee20 000007fe`fe05ba22 ole32!NdrExtNegotiateTransferSyntax+0xe5 
00000000`0a56ee60 000007fe`fe05cbbb rpcrt4!Ndr64pClientSetupTransferSyntax+0x453
00000000`0a56eec0 000007fe`ff4621d0 rpcrt4!NdrpClientCall3+0xcb
00000000`0a56f180 000007fe`ff31d8a2 ole32!ObjectStublessClient+0x11d 
00000000`0a56f510 000007fe`ff321bb3 ole32!ObjectStubless+0x42 
00000000`0a56f560 000007fe`ff321b22 ole32!RemoteReleaseRifRefHelper+0x57 
00000000`0a56f5b0 000007fe`ff3217eb ole32!RemoteReleaseRifRef+0xca 
00000000`0a56f620 000007fe`ff321417 ole32!CStdMarshal::DisconnectCliIPIDs+0x4c2 
00000000`0a56f720 000007fe`ff3194fa ole32!CStdMarshal::Disconnect+0x40c 
00000000`0a56f780 000007fe`ff319428 ole32!CStdIdentity::~CStdIdentity+0xa6 [d:\w7rtm\com\ole32\com\dcomrem\stdid.cxx @ 312]
00000000`0a56f7b0 000007fe`ff319b49 ole32!CStdIdentity::`scalar deleting destructor'+0x14
00000000`0a56f7e0 000007fe`f2a79f94 ole32!CStdIdentity::CInternalUnk::Release+0xdc [d:\w7rtm\com\ole32\com\dcomrem\stdid.cxx @ 767]
00000000`0a56f810 000007fe`f2ba8bea clr!SafeReleasePreemp+0x74
00000000`0a56f860 000007fe`f2ba8acc clr!RCW::ReleaseAllInterfaces+0xda
00000000`0a56f8b0 000007fe`f2ba8c14 clr!RCW::ReleaseAllInterfacesCallBack+0x54
00000000`0a56f930 000007fe`f2ba937e clr!RCW::Cleanup+0x25
00000000`0a56f980 000007fe`f2ba9214 clr!RCWCleanupList::ReleaseRCWListRaw+0x16
00000000`0a56f9b0 000007fe`f2bb005a clr!RCWCleanupList::ReleaseRCWListInCorrectCtx+0x94
00000000`0a56f9f0 000007fe`f2be326e clr!RCWCleanupList::CleanupAllWrappers+0xe5
00000000`0a56fa70 000007fe`f2be319f clr!SyncBlockCache::CleanupSyncBlocks+0xc2
00000000`0a56fae0 000007fe`f2be47c7 clr!Thread::DoExtraWorkForFinalizer+0xdc
00000000`0a56fb10 000007fe`f2a5458c clr!SVR::GCHeap::FinalizerThreadWorker+0x78
00000000`0a56fb50 000007fe`f2a5451a clr!Frame::Pop+0x50
00000000`0a56fb90 000007fe`f2a54491 clr!COMCustomAttribute::PopSecurityContextFrame+0x192
00000000`0a56fc90 000007fe`f2b31bfe clr!COMCustomAttribute::PopSecurityContextFrame+0xbd
00000000`0a56fd20 000007fe`f2b45020 clr!ManagedThreadBase_NoADTransition+0x3f
00000000`0a56fd80 000007fe`f2ab33de clr!SVR::GCHeap::FinalizerThreadStart+0xb4
00000000`0a56fdc0 00000000`772459ed clr!Thread::intermediateThreadProc+0x7d
00000000`0a56fe80 00000000`7747c541 kernel32!BaseThreadInitThunk+0xd
00000000`0a56feb0 00000000`00000000 ntdll!RtlUserThreadStart+0x1d

0:009> !CLRStack
OS Thread Id: 0x1338 (6)
        Child SP               IP Call Site
000000000b67fcd8 00000000774a12fa [DebuggerU2MCatchHandlerFrame: 000000000b67fcd8]

Answer 1

这是一个终结工作者，它被阻止进行RPC响应。在这种情况下，如果线程没有等待超过几毫秒（取决于COM服务器响应请求所需的时间），这是正常的。但是如果我们等待的时间更长，那么您可能想要调查响应数据包发生了什么。

如果问题可以重新生成，那么在用户模式下无法理解您可能想要在正在运行的系统上使用livekd检查相同线程的线程的滴答计数

Answer 2

这是终结器被阻止的指示。如果使用COM在Excel和C＃之间进行交互，这是一个非常简单的示例。你有一个Excel模块正在成为C＃的成员变量，然后问题可能出现，因为该模块的控制权在GC的手中，但是excel将等待它被C＃释放。简单的方法是在清除非托管代码之前清除C＃组件中的任何非托管代码。

这是终结器被阻止的迹象

2 个答案: