Re: [LTP] [Patch] Fix mtest06 failure: caught unexpected signal - 11 --- exiting

[Subrata Modak <subrata@linux.vnet.ibm.com>]

I think we missed this as well.

Regards--
Subrata

On Tue, 2010-08-17 at 07:57 +0200, Liang, RenXiu wrote:
> In mtest06/mmap1.c, when handling the signal 11 in sig_handler, it
> doesn't cover another two race conditions:
> one is si_code equals "SEGV_MAPERR" but si_address does not equal to
> map_address;
> and one is si_code equals to "SEGV_ACCERR"; see below error log:
> 
> <<<test_start>>>
> tag=mtest06 stime=1270902396
> cmdline="  mmap1 -x 0.05"
> contacts=""
> analysis=exit
> initiation_status="ok"
> <<<test_output>>>
> mmap1       0  INFO  :  pid[5456]: map, change contents, unmap files
> 1000 times
> mmap1       0  INFO  :  created thread[1216369840]
> mmap1       0  INFO  :  pid[5456] - read contents of memory 0x48002000
> 1000 times
> mmap1       0  INFO  :  page fault occurred at 0x48002000
> mmap1       0  INFO  :  page fault occurred at 0x48002000
> mmap1       0  INFO  :  page fault occurred at 0x48002000
> mmap1       0  INFO  :  page fault occurred at 0x48002000
> ......
> mmap1       0  INFO  :  page fault occurred at 0x48002000
> mmap1       0  INFO  :  page fault occurred at 0x48002000
> caught unexpected signal - 11 --- exiting
> <<<execution_status>>>
> duration=1 termination_type=exited termination_id=255 corefile=no
> cutime=0 cstime=4
> <<<test_end>>>
> 
> After cover all the three race conditions in one case in
> sig_handler(), run mtest06 repeatedly, test will not fail by catching
> signal 11.
> 
> See attached patch.
> 
> Thanks,
> Renxiu
> 
> 
> 
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