Re: Mixed .Net process dies without a trace: Fatal Execution Engine Error (7A103E78) (800703e9)

Wait, forgot to tell.
The sequence A-->B-->C doesn't kill the process immediately. The first 2 
times it works fine. But the 3rd time it dies...

----- Original Message ----- 
From: "Peter vd Weerd" <[email protected]>
To: <[email protected]>
Sent: Wednesday, December 16, 2009 12:05 AM
Subject: [ADVANCED-DOTNET] Mixed .Net process dies without a trace: Fatal 
Execution Engine Error (7A103E78) (800703e9)


Hi experts,

I have an COM-interop problem.
The host is a C++ COM-component (A), which loads a .Net object (B) that is 
comvisible.
A method in this .Net object is called and loads a different C++ 
COM-component (C).

So: A-->B-->C.

All the C++ COM-components are threadsave and support the freethreaded 
marshaler.
They are registered with threadingmode=both. The whole thing runs on a 
STA-thread.

In some situations, the application dies without a trace, and a msg is in 
the eventlog:
.NET Runtime version 2.0.50727.3082 - Fatal Execution Engine Error 
(7A103E78) (800703e9)

800703e9 means: stackoverflow.

When I run it from Visual studio, I stops in the call from B to C, indead 
with a stackoverflow, but I can't see any unmanaged code (DLL's are not 
written in MS C++).

So I used ADPlus in crash-mode to generate some dumps, and investigate 
there.
The last thing I can see there is a DebugBreak.
The stacktrace is below.
It looks like the CLR does some marshaling magic and peeks the msg queue. I 
didn't expect that because of the FT marshaller.
Furthermore, if I put a MessageBox in the .Net code, just before the call to 
C, everything works fine. So my feeling is that it has something to do with 
marshaling and timing.
But I can't get my finger on the right place.

Any idea's? Any pointers where to look? Thanks a lot.

Peter


The stacktrace is:
(By the way, igor is my 'A' component, the stack doesn't show any code of 
the 'C' component.
And although the method in C wasn't executed, there has been a lot of 
QueryInterfaces, AddRefs, etc in that 'C' component.)

037bc278 7a096467 037bc71c 79f7762b 3ab9eb41 ntdll!DbgBreakPoint
037bc728 7a096796 800703e9 7a103e78 00000000 
mscorwks!EEPolicy::LogFatalError+0x2b5
037bc740 7a103e83 800703e9 7a103e78 00000000 
mscorwks!EEPolicy::HandleFatalError+0x4d
037bc768 7a0bd9a9 3ab9ebd1 071f8a98 037becd4 
mscorwks!Thread::RestoreGuardPage+0xb7
037bc7b8 79f4c30c 037becd4 3ab9eb95 071f8a98 
mscorwks!ReleaseTransitionHelper+0x103
037bc7fc 79f4c370 037becd4 071f8a78 3ab9e459 mscorwks!SafeReleaseHelper+0x8c
037bc830 79faa892 037becd4 071f8a78 00000001 mscorwks!SafeRelease+0x2f
037bc848 79faa9ad 3ab9e411 00000001 071f8a78 
mscorwks!RCW::ReleaseAllInterfaces+0x48
037bc878 79faa9d9 071f8a78 3ab9e4c1 00000001 
mscorwks!RCW::ReleaseAllInterfacesCallBack+0xbd
037bc8a8 7a079480 16effb74 037bc8e4 7a0798e8 mscorwks!RCW::Cleanup+0x22
037bc8b4 7a0798e8 071f9100 3ab9e48d 037bc900 
mscorwks!RCWCleanupList::ReleaseRCWListRaw+0x16
037bc8e4 7a043f25 000a0800 000a0800 037bc910 
mscorwks!RCWCleanupList::ReleaseRCWListInCorrectCtx+0xdf
037bc8f4 77525834 16effa10 037bc914 037bc93c 
mscorwks!CtxEntry::EnterContextCallback+0x89
037bc910 77e799f4 0bd8ed80 0bd8e930 02020202 
ole32!CRemoteUnknown::DoCallback+0x7a
037bc92c 77ef421a 775257f9 037bc940 00000002 rpcrt4!Invoke+0x30
037bcd30 77ef4bf3 0bd845f8 0bd8f170 000d53b8 rpcrt4!NdrStubCall2+0x297
037bcd88 77600c15 0bd845f8 000d53b8 0bd8f170 
rpcrt4!CStdStubBuffer_Invoke+0xc6
037bcdc8 77600bbf 000d53b8 0bdb5ff4 00000000 ole32!SyncStubInvoke+0x33
037bce10 7752ad31 000d53b8 071e9428 0bd845f8 ole32!StubInvoke+0xa7
037bcee8 7752ac56 0bd8f170 00000000 0bd845f8 
ole32!CCtxComChnl::ContextInvoke+0xe3
037bcf04 7752b771 000d53b8 00000001 0bd845f8 ole32!MTAInvoke+0x1a
037bcf30 77600e1f 000d53b8 00000001 0bd845f8 ole32!STAInvoke+0x4a
037bcf64 77602df3 000d5360 0bd8f170 0bd845f8 ole32!AppInvoke+0x7e
037bd038 77600dd6 000d5360 0007b818 00000000 
ole32!ComInvokeWithLockAndIPID+0x2c2
037bd064 7752b7ab 000d5360 00000400 000cc000 ole32!ComInvoke+0x60
037bd078 7752b5e1 000d5360 037bd0f8 7752b54e ole32!ThreadDispatch+0x23
037bd090 7e418734 00080944 00056128 0000babe ole32!ThreadWndProc+0xfe
037bd0bc 7e418816 7752b54e 00080944 00000400 user32!InternalCallWinProc+0x28
037bd124 7e4189cd 00000000 7752b54e 00080944 
user32!UserCallWinProcCheckWow+0x150
037bd184 7e418a10 037bd1a8 00000000 037bd1c4 
user32!DispatchMessageWorker+0x306
037bd194 7752f2d0 037bd1a8 00000102 037bd208 user32!DispatchMessageW+0xf
037bd1c4 7752f10d 80010115 80010115 00000000 
ole32!CCliModalLoop::PeekRPCAndDDEMessage+0x4c
037bd1d8 77557237 037bd40c 00000001 037bd204 
ole32!CCliModalLoop::BlockFn+0x5e
037bd24c 79f9e14d 00000002 00000001 00000001 
ole32!CoWaitForMultipleHandles+0xcf
037bd26c 79f9e0b4 00000000 00000001 00000001 mscorwks!NT5WaitRoutine+0x51
037bd2d8 79f9e018 00000001 037bd40c 00000000 mscorwks!MsgWaitHelper+0xa5
037bd2f8 79f4c664 00000001 037bd40c 00000000 
mscorwks!Thread::DoAppropriateAptStateWait+0x28
037bd37c 79f4c6f9 00000001 037bd40c 00000000 
mscorwks!Thread::DoAppropriateWaitWorker+0x13c
037bd3cc 79f90c76 00000001 037bd40c 00000000 
mscorwks!Thread::DoAppropriateWait+0x40
037bd41c 79ef018c 00000001 0bd56d70 037bd47c mscorwks!Thread::JoinEx+0x86
037bd42c 7a079b7c 00000001 00000001 3ab9f815 mscorwks!Thread::Join+0x14
037bd47c 79faa55f 00000001 037bd4cc 79faa5c8 
mscorwks!RCWCleanupList::CleanupWrappersInCurrentCtxThread+0x15a
037bd488 79faa5c8 0721495c 037bd52c 3ab9f8a5 mscorwks!RCW::Initialize+0x78
037bd4cc 79faa25f 0721495c 037bd52c 3ab9f955 mscorwks!RCW::CreateRCW+0x84
037bd53c 79faa36d 00000000 037bd578 3ab9f9e1 
mscorwks!COMInterfaceMarshaler::CreateObjectRef+0x45
037bd588 79f9d0f8 3ab9f62d 037bdce4 037bdce4 
mscorwks!COMInterfaceMarshaler::FindOrCreateObjectRef+0xac
037bda44 79f9d294 072148e8 058e6918 00000001 
mscorwks!GetObjectRefFromComIP+0x1ec
037bda64 79f9d2fb 000c3940 072148e8 058e5bb0 
mscorwks!UnmarshalObjectFromInterface+0x19
037bda80 79fb5089 037bdce4 037bdcc8 79fb5079 
mscorwks!InterfaceMarshalerBase::ConvertSpaceNativeToCLR+0x30
037bda8c 79fb5079 037bdf70 037bdf60 3ab9f0a1 
mscorwks!DefaultMarshalOverrides<InterfaceMarshalerBase>::ReturnCLRFromNativeRetval+0xb
037bdcc8 79f139af 058da2d3 037bdf5c 037bdf74 mscorwks!RunML+0x9ac
037bdfa8 058da28e 0bd56d70 037bdffc 3987259a mscorwks!CLRToCOMWorker+0x25f
WARNING: Frame IP not in any known module. Following frames may be wrong.
037bdfe4 05a8313f 1200e4d0 1200ec7c 11f0d990 0x58da28e
037be11c 79f68c32 057a26cc 0bd56d70 00000000 0x5a8313f
037be20c 79f68deb 0bd56d70 037be404 037be47c 
mscorwks!COMToCLRWorkerBody+0x115
037be268 79f68f54 0bd56d70 037be404 037be47c 
mscorwks!COMToCLRWorkerDebuggerWrapper+0x37
037be43c 058da706 0bd56d70 037be47c 3987259a mscorwks!COMToCLRWorker+0x157
*** WARNING: Unable to verify checksum for igor022.dll
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for 
igor022.dll -
037be464 0a50defc 0ae26b88 037beecc 0add0020 0x58da706
037be49c 0a50e58c 0add0020 037beecc 037beecc igor022!taoDeleteFiles+0x47ac
037be4b4 0a510c1c 0ad99a74 037beecc 00000001 igor022!taoDeleteFiles+0x4e3c
037be504 0a4fcece 0ad319b0 037beecc 0ad319b0 igor022!taoDeleteFiles+0x74cc
037bf35c 0a4fca96 0ad306a8 00000000 00000002 igor022!PtrToInt+0xbbd2e
037bf4a8 0a4fc68f 0ad306a8 0a5f2148 00000003 igor022!PtrToInt+0xbb8f6
037bf500 0a5302f3 0ad306a8 0bad5ef0 00000003 igor022!PtrToInt+0xbb4ef



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