Archive for September 7th, 2011

Crash Dump Analysis Patterns (Part 148)

Wednesday, September 7th, 2011

Whereas Stack Trace Collection pattern covers all thread stack traces from a memory dump Stack Trace Set pattern covers only unique non-duplicated thread stack traces differing for example, in stack frame modules and function names. In user process memory dumps it is !uniqstack WinDbg command (don’t forget that command has optional parameters, for example, -v to simulate verbose ~*kv output):

0:000> ~
.  0  Id: f00.f04 Suspend: 0 Teb: 7efdd000 Unfrozen
   1  Id: f00.f18 Suspend: 1 Teb: 7efda000 Unfrozen
   2  Id: f00.f1c Suspend: 1 Teb: 7efd7000 Unfrozen

0:000> ~*kc

.  0  Id: f00.f04 Suspend: 0 Teb: 7efdd000 Unfrozen

ntdll!NtWaitForMultipleObjects
KERNELBASE!WaitForMultipleObjectsEx
kernel32!WaitForMultipleObjectsExImplementation
kernel32!WaitForMultipleObjects
kernel32!WerpReportFaultInternal
kernel32!WerpReportFault
kernel32!BasepReportFault
kernel32!UnhandledExceptionFilter
ntdll!__RtlUserThreadStart
ntdll!_EH4_CallFilterFunc
ntdll!_except_handler4
ntdll!ExecuteHandler2
ntdll!ExecuteHandler
ntdll!KiUserExceptionDispatcher
KERNELBASE!DebugBreak
ApplicationK!main
ApplicationK!__tmainCRTStartup
kernel32!BaseThreadInitThunk
ntdll!__RtlUserThreadStart
ntdll!_RtlUserThreadStart

   1  Id: f00.f18 Suspend: 1 Teb: 7efda000 Unfrozen

ntdll!NtDelayExecution
KERNELBASE!SleepEx
KERNELBASE!Sleep
kernel32!WerpReportFault
kernel32!BasepReportFault
kernel32!UnhandledExceptionFilter
ntdll!__RtlUserThreadStart
ntdll!_EH4_CallFilterFunc
ntdll!_except_handler4
ntdll!ExecuteHandler2
ntdll!ExecuteHandler
ntdll!KiUserExceptionDispatcher
ApplicationK!thread_two
ApplicationK!_callthreadstart
ApplicationK!_threadstart
kernel32!BaseThreadInitThunk
ntdll!__RtlUserThreadStart
ntdll!_RtlUserThreadStart

   2  Id: f00.f1c Suspend: 1 Teb: 7efd7000 Unfrozen

ntdll!NtDelayExecution
KERNELBASE!SleepEx
KERNELBASE!Sleep
kernel32!WerpReportFault
kernel32!BasepReportFault
kernel32!UnhandledExceptionFilter
ntdll!__RtlUserThreadStart
ntdll!_EH4_CallFilterFunc
ntdll!_except_handler4
ntdll!ExecuteHandler2
ntdll!ExecuteHandler
ntdll!KiUserExceptionDispatcher
ApplicationK!thread_two
ApplicationK!_callthreadstart
ApplicationK!_threadstart
kernel32!BaseThreadInitThunk
ntdll!__RtlUserThreadStart
ntdll!_RtlUserThreadStart

0:000> !uniqstack
Processing 3 threads, please wait

.  0  Id: f00.f04 Suspend: 0 Teb: 7efdd000 Unfrozen
      Start: ApplicationK!mainCRTStartup (013a137c)
      Priority: 0  Priority class: 32  Affinity: 3
ChildEBP RetAddr 
0037f1a4 770d0bdd ntdll!NtWaitForMultipleObjects+0x15
0037f240 7529162d KERNELBASE!WaitForMultipleObjectsEx+0x100
0037f288 75291921 kernel32!WaitForMultipleObjectsExImplementation+0xe0
0037f2a4 752b9b2d kernel32!WaitForMultipleObjects+0x18
0037f310 752b9bca kernel32!WerpReportFaultInternal+0x186
0037f324 752b98f8 kernel32!WerpReportFault+0x70
0037f334 752b9875 kernel32!BasepReportFault+0x20
0037f3c0 77b10df7 kernel32!UnhandledExceptionFilter+0x1af
0037f3c8 77b10cd4 ntdll!__RtlUserThreadStart+0x62
0037f3dc 77b10b71 ntdll!_EH4_CallFilterFunc+0x12
0037f404 77ae6ac9 ntdll!_except_handler4+0x8e
0037f428 77ae6a9b ntdll!ExecuteHandler2+0x26
0037f4d8 77ab010f ntdll!ExecuteHandler+0x24
0037f4d8 770d280c ntdll!KiUserExceptionDispatcher+0xf
0037f824 013a1035 KERNELBASE!DebugBreak+0x2
0037f828 013a1325 ApplicationK!main+0x25
0037f870 75293677 ApplicationK!__tmainCRTStartup+0xfb
0037f87c 77ad9f02 kernel32!BaseThreadInitThunk+0xe
0037f8bc 77ad9ed5 ntdll!__RtlUserThreadStart+0x70
0037f8d4 00000000 ntdll!_RtlUserThreadStart+0x1b

.  1  Id: f00.f18 Suspend: 1 Teb: 7efda000 Unfrozen
      Start: ApplicationK!_threadstart (013a10d1)
      Priority: 0  Priority class: 32  Affinity: 3
ChildEBP RetAddr 
0080f9ac 770d31bb ntdll!NtDelayExecution+0x15
0080fa14 770d3a8b KERNELBASE!SleepEx+0x65
0080fa24 752d28dd KERNELBASE!Sleep+0xf
0080fa38 752b98f8 kernel32!WerpReportFault+0x3f
0080fa48 752b9875 kernel32!BasepReportFault+0x20
0080fad4 77b10df7 kernel32!UnhandledExceptionFilter+0x1af
0080fadc 77b10cd4 ntdll!__RtlUserThreadStart+0x62
0080faf0 77b10b71 ntdll!_EH4_CallFilterFunc+0x12
0080fb18 77ae6ac9 ntdll!_except_handler4+0x8e
0080fb3c 77ae6a9b ntdll!ExecuteHandler2+0x26
0080fbec 77ab010f ntdll!ExecuteHandler+0x24
0080fbec 013a1000 ntdll!KiUserExceptionDispatcher+0xf
0080ff38 013a10ab ApplicationK!thread_two
0080ff70 013a1147 ApplicationK!_callthreadstart+0x1b
0080ff78 75293677 ApplicationK!_threadstart+0x76
0080ff84 77ad9f02 kernel32!BaseThreadInitThunk+0xe
0080ffc4 77ad9ed5 ntdll!__RtlUserThreadStart+0x70
0080ffdc 00000000 ntdll!_RtlUserThreadStart+0x1b

Total threads: 3
Duplicate callstacks: 1(windbg thread #s follow):
2

Generally, any property can be chosen to form such a set from a collection of stack traces.

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

Icons for Memory Dump Analysis Patterns (Part 98)

Wednesday, September 7th, 2011

Today we introduce an icon for Missing Component (general) pattern:

B/W

Color

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

MVC Worldview and The Origin of Economic Order

Wednesday, September 7th, 2011

A few weeks ago when I was asked about my opinion whether the current economic crisis will deepen an idea came to me that Cloud Computing is the last Model piece of MVC (Model-View-Controller) where View is Social Media such as Facebook, LinkedIn, Twitter, etc. and Controller is Internet itself. With the final piece of the puzzle the World needs new MVC Revolution in order to get back on track.