Can't figure out what's wrong in my code

Question

I have a dump file which I managed to create, from my DLL which is created for any unhandled exception.

When I did something like int* tt = new int[4]; return int[n]; with n = 4, I would get the dump file, and could open it, and see at what line the error is caused. This was possible for both directly from a release exe, and a release DLL.

Now this was an easy error, and I only entered it to test my memory dump creation.

I now have a 900kb dump file, and the event log says the error comes from my .DLL, yet if I open the file, it does not display any source code.

The call stack is

KERNELBASE.dll!RaiseException() + 0x3d bytes
clr.dll!RaiseTheExceptionInternalOnly() + 0x18f bytes
clr.dll!IL_Throw() + 0xe2 bytes
000007fe81f65fd7()
00000000034d1610()
000000002d06ecb8()
436f93ce00050011()
436f93cf00110012()
000000002d06ec50()
00006d930c4f7680()
clr.dll!InlinedCallFrame::`vftable'()
000000002d06f3d8()

which does not help me at all to figure out where in the DLL my error is coming from. Another issue with debugging this is, it only happens on a live-PC, but never on my debugging system. Can anyone help me finding a way how to debug this? It seems to happen on the calling of the DLL, but: not every time, only like every 2nd time (sometimes on 1st try, sometimes on 5th). I am completely lost on what is happening here.

Edit: Updated the call stack with the Microsoft symbols loaded, but I still do not know where this may be coming from.

Answer 1

You need to load the symbols for kernelbase.dll. And possibly clr.dll.

Presumably you are using visual studio? Set it up to access symbols from the microsoft symbol server: http://msdn.microsoft.com/en-us/library/b8ttk8zy(v=vs.80).aspx

You may need to right click on items in the callstack and tell it to load symbols.

Additionally be sure to keep a copy of the pdb file for any releases of software you make.