Date: Fri, 09 Oct 2009 21:27:21 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Mel Flynn <mel.flynn+fbsd.hackers@mailing.thruhere.net> Cc: freebsd-hackers@freebsd.org Subject: Re: Running a program through gdb without "interfering" Message-ID: <86skdss6zq.fsf@ds4.des.no> In-Reply-To: <200910091650.04231.mel.flynn%2Bfbsd.hackers@mailing.thruhere.net> (Mel Flynn's message of "Fri, 9 Oct 2009 16:50:04 %2B0200") References: <200910090015.24175.mel.flynn%2Bfbsd.hackers@mailing.thruhere.net> <86skds7vqi.fsf@ds4.des.no> <200910091650.04231.mel.flynn%2Bfbsd.hackers@mailing.thruhere.net>
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Mel Flynn <mel.flynn+fbsd.hackers@mailing.thruhere.net> writes: > Dag-Erling Sm=C3=B8rgrav <des@des.no> writes: > > Yes, just run "gdb /path/to/program" and type "run". > Not what I was looking for. The segfaults are random and the only way to= =20 > somewhat reliably reproduce it is to have portmaster invoke it as it's=20 > PM_SU_CMD. And no, running that same command again doesn't trigger the=20 > segfault, so it's "something environmental". Hence I'm looking for someth= ing=20 > like: > gdb -batch -x script_with_run_cmd.gdb -exec /usr/local/bin/sudo $argv > > where somehow I need $argv to be passed as arguments to sudo. I'm thinkin= g i=20 > should just wrap it and mktemp(1) a new command script for gdb to use wit= h set=20 > args $*, but if anyone has a more clever idea, I'd love to hear it. Why look for a clever option, when the simple one will do just fine? :>gdb-script-$$ echo "set args $@" >>gdb-script-$$ echo "run" >>gdb-script-$$ gdb -batch -x gdb-script-$$ /usr/local/bin/sudo > It still segfaults and doesn't dump: > Oct 9 04:34:18 smell kernel: pid 39476 (sudo), uid 0: exited on signal 11 > Oct 9 04:36:32 smell kernel: pid 79657 (sudo), uid 0: exited on signal 11 > Oct 9 04:36:43 smell kernel: pid 82390 (sudo), uid 0: exited on signal 11 > Oct 9 04:51:46 smell kernel: pid 3601 (sudo), uid 0: exited on signal 11 > > find / -name '*.core' in the jail does not yield anything.=20 Add 'ulimit -c unlimited' somewhere in the script before it invokes sudo. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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