What do I do when my program crashes with exception 0xc0000005 at address 0

Question

My Delphi program runs as an NT service and has been running fine for more than 2 months and then it stops suddenly and generates a crash dump      Faulting application name  tca shctisvc ip exe  version  7 1 0 1843  time stamp  0x2a425e19 Faulting module name  unknown  version  0 0 0 0  time stamp  0x00000000 Exception code  0xc0000005 Fault offset  0x00000000     There were no real addresses to work from based on information in the Windows event log  I was able to load the mini dump into WinDbg and it said there was an exception but found problems with the stack frames  A different tool  Viewminidump  was able to show me stacks of the running threads   Where do I begin to resolve this issue

User · Answer

I was getting the same issue with a different application,

Faulting application name: javaw.exe, version: 8.0.51.16, time stamp: 0x55763d32
Faulting module name: mscorwks.dll, version: 2.0.50727.5485, time stamp: 0x53a11d6c
Exception code: 0xc0000005
Fault offset: 0x0000000000501090
Faulting process id: 0x2960
Faulting application start time: 0x01d0c39a93c695f2
Faulting application path: C:\Program Files\Java\jre1.8.0_51\bin\javaw.exe
Faulting module path:C:\Windows\Microsoft.NET\Framework64\v2.0.50727\mscorwks.dll

I was using the The Enhanced Mitigation Experience Toolkit (EMET) from Microsoft and I found by disabling the EMET features on javaw.exe in my case as this was the faulting application, it enabled my application to run successfully. Make sure you don't have any similar software with security protections on memory.

User · Answer

Problems with the stack frames could indicate stack corruption  a truely horrible beast   optimisation  or mixing frameworks such as C C   C  Delphi and other craziness as that - there is no absolute standard with respect to stack frames    Some languages do not even have them     So  I suggest getting slightly annoyed with the stack frame issues  ignoring it  and then just use Remy s answer

User · Answer

Exception code 0xc0000005 is an Access Violation   An AV at fault offset 0x00000000 means that something in your service s code is accessing a nil pointer   You will just have to debug the service while it is running to find out what it is accessing   If you cannot run it inside a debugger  then at least install a third-party exception logger framework  such as EurekaLog or MadExcept  to find out what your service was doing at the time of the AV

[delphi] What do I do when my program crashes with exception 0xc0000005 at address 0?

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