Date: Wed, 7 Jan 2004 09:43:17 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Jens Schweikhardt <schweikh@schweikhardt.net> Cc: current@freebsd.org Subject: Re: strace hangs waiting for lock Message-ID: <20040107154316.GO38169@dan.emsphone.com> In-Reply-To: <20040106204306.GA2675@schweikhardt.net> References: <20040106204306.GA2675@schweikhardt.net>
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In the last episode (Jan 06), Jens Schweikhardt said: > it appears the devel/strace port's strace utility does not work > anymore (haven't tried for a long time, so this could be long > standing issue). To reproduce: > > schweikh@hal9000:~ 1 $ strace -V > strace -- version 4.5.1 > schweikh@hal9000:~ $ uname -a > FreeBSD hal9000.schweikhardt.net 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Mon Dec 22 15:03:45 CET 2003 toor@hal9000.schweikhardt.net:/usr/obj/usr/src/sys/HAL9000 i386 > schweikh@hal9000:~ $ strace ls # does nothing, just waits. > ^C It's intermittent on my machine. Sometimes it works, sometimes it doesn't. Sounds like there's a race being lost somewhere. Stracing an existing process with -p always works for me. <plug> If you're using strace because truss doesn't decode what you want, try applying the patches in PR 52190. It adds support for 8 more common syscalls. </plug> http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/52190 -- Dan Nelson dnelson@allantgroup.com
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