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These are handy shortcuts to .frame command. .f+ shifts the current frame index down the stack trace and .f- shifts it up towards the top. More information can be found in WinDbg help.

Here is an example from notepad process stack trace:

0:000> kn
 # ChildEBP RetAddr
00 001bfcfc 761ef837 ntdll!KiFastSystemCallRet
01 001bfd00 761ef86a USER32!NtUserGetMessage+0xc
02 001bfd1c 00c31418 USER32!GetMessageW+0x33
03 001bfd5c 00c3195d notepad!WinMain+0xec
04 001bfdec 76364911 notepad!_initterm_e+0x1a1
05 001bfdf8 76fde4b6 kernel32!BaseThreadInitThunk+0xe
06 001bfe38 76fde489 ntdll!__RtlUserThreadStart+0x23
07 001bfe50 00000000 ntdll!_RtlUserThreadStart+0x1b
0:000> .f+
01 001bfd00 761ef86a USER32!NtUserGetMessage+0xc
0:000> .f+
02 001bfd1c 00c31418 USER32!GetMessageW+0x33
0:000> .f+
03 001bfd5c 00c3195d notepad!WinMain+0xec
0:000> .f+
04 001bfdec 76364911 notepad!_initterm_e+0x1a1
0:000> .f-
03 001bfd5c 00c3195d notepad!WinMain+0xec
0:000> .f-
02 001bfd1c 00c31418 USER32!GetMessageW+0x33
0:000> .f-
01 001bfd00 761ef86a USER32!NtUserGetMessage+0xc
0:000> .f-
00 001bfcfc 761ef837 ntdll!KiFastSystemCallRet
0:000> .f-
         ^ Current frame index underflow '.f-'

- Dmitry Vostokov @ DumpAnalysis.org -

           

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This entry was posted on Monday, July 28th, 2008 at 12:31 am and is filed under Crash Dump Analysis, Debugging, WinDbg Tips and Tricks. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.