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cstackcallwin64

Call stack doesn't give a clue

We are having a 32Bit 'C' - Win32 Application that occasionally hangs

At the time of a Hang, (non Responsive state) the customer sent us the Dump When i opened the dump in Windbg, the call stack gives the following

wow64win!NtUserMessageCall+0xa
wow64win!whNT32NtUserMessageCallCB+0x32
wow64win!Wow64DoMessageThunk+0x8b
wow64win!whNtUserMessageCall+0x12e
wow64!Wow64SystemServiceEx+0xd7
wow64cpu!TurboDispatchJumpAddressEnd+0x2d
wow64!RunCpuSimulation+0xa
wow64!Wow64LdrpInitialize+0x42a
ntdll!LdrpInitializeProcess+0x17e3
ntdll! ?? ::FNODOBFM::`string'+0x28ff0
ntdll!LdrInitializeThunk+0xe

I am not getting a clue as the call stack is not pointing to our code.

PS :- The Hang situation is not just common for 64 bit systems.

Solution

  • you need switch to 32 bits in windbg, !wow64exts.sw, this print out real stack trace for wow64 target.