TAILIEUCHUNG - Memory Dump Analysis Anthology- P10

Memory Dump Analysis Anthology- P10: This is a revised, edited, cross-referenced and thematically organized volume of selected blog posts about crash dump analysis and debugging written in 2006 - 2007 for software engineers developing and maintaining products on Windows platforms, technical support and escalation engineers dealing with complex software issues and general Windows users. | Hidden Exception 271 HIDDEN EXCEPTION Another pattern that occurs frequently is called Hidden Exception. It manifests itself when we run analyze -v command and we don t see an exception or we see only a breakpoint hit. In this case manual analysis is required. Sometimes this happens because of another pattern Multiple Exceptions page 255 . In other cases an exception happens and it is handled by an exception handler dismissing it and a process continues its execution slowly accumulating corruption inside its data leading to a new crash or hang. Sometimes we see a process hanging during its termination like the case shown below. We have a process dump with only one thread 0 000 kv ChildEBP RetAddr 0096fcdc 7c822124 ntdll KiFastSystemCallRet 0096fce0 77e6baa8 ntdll NtWaitForSingleObject 0xc 0096fd50 77e6ba12 kernel32 WaitForSingleObjectEx 0xac 0096fd64 67f016ce kernel32 WaitForSingleObject 0x12 0096fd78 7c82257a component DllInitialize 0xc2 0096fd98 7c8118b0 ntdll LdrpCallInitRoutine 0x14 0096fe34 77e52fea ntdll LdrShutdownProcess 0x130 0096ff20 77e5304d kernel32 _ExitProcess 0x43 0096ff34 77bcade4 kernel32 ExitProcess 0x14 0096ff40 77bcaefb msvcrt __crtExitProcess 0x32 0096ff70 77bcaf6d msvcrt _cinit 0xd2 0096ff84 77bcb555 msvcrt _exit 0x11 0096ffb8 77e66063 msvcrt _endthreadex 0xc8 0096ffec 00000000 kernel32 BaseThreadStart 0x34 We can look at its raw stack and try to find the following address KiUserExceptionDispatcher This function calls RtlDispatchException 0 000 teb TEB at 7ffdc000 ExceptionList 0096fd40 StackBase 00970000 StackLimit 0096a000 SubSystemTib 00000000 FiberData 00001e00 ArbitraryUserPointer 00000000 Self 7ffdc000 EnvironmentPointer 00000000 ClientId 00000858 000008c0 Please purchase PDF Split-Merge on to remove this watermark 272 PART 3 Crash Dump Analysis Patterns RpcHandle 00000000 Tls Storage 00000000 PEB Address 7ffdd000 LastErrorValue 0 LastStatusValue C0000135 Count Owned Locks 0 HardErrorMode 0 0 000 dds 0096a000 00970000 .

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