Date: Wed, 20 Feb 2008 16:10:04 GMT From: Volker <volker@vwsoft.com> To: freebsd-i386@FreeBSD.org Subject: Re: i386/120872: fstat exit on signall 11 Message-ID: <200802201610.m1KGA419033049@freefall.freebsd.org>
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The following reply was made to PR i386/120872; it has been noted by GNATS. From: Volker <volker@vwsoft.com> To: Dmitry Andrianov <666.root@gmail.com> Cc: bug-followup@FreeBSD.org Subject: Re: i386/120872: fstat exit on signall 11 Date: Wed, 20 Feb 2008 17:03:24 +0100 On 02/20/08 16:33, Dmitry Andrianov wrote: > Possibly, followings lines to you it will be helped something: > > root@zingel:~$ fstat -M test.c > Segmentation fault: 11 > root@zingel:~$ ls -al test.c > -rw-r--r-- 1 root wheel 142B Jan 30 14:13 test.c > root@zingel:~$ perl -e "print 'A' x45" > test1.c > root@zingel:~$ fstat -M test1.c > Segmentation fault: 11 > root@zingel:~$ ls -la test1.c > -rw-r--r-- 1 root wheel 142B Feb 20 17:53 test1.c > root@zingel:~$ cat > test2.c > AAABBBCCCC > ^C > root@zingel:~$ fstat -M test2.c > fstat: cannot read IdlePTD > root@zingel:~$ ls -la test2.c > -rw-r--r-- 1 root wheel 11B Feb 20 17:55 test2.c > root@zingel:~$ Dmitry, I still don't get the picutre. Can you try to explain what you are going to try? The -M parameter requires a core dump file to be given. If given, fstat tries to list you all opened files of a process at the time the process was getting killed. I agree, it's not nice to have it failing with a segfault but while looking at the code, I'm not quite sure if the error message can be changed easily. fstat needs to check if the file given as -M (core) is really a core dump file before it's getting processed. That's an extra sanity check that would be needed to suppress that message and fail with a better message earlier. I'll leave this to the developers if they'll implement that extra check and if it's possible to check that at all. PS: Please followup to the PR
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