Date: Fri, 30 May 2003 15:10:58 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Christopher Nehren <apeiron@comcast.net> Cc: current@freebsd.org Subject: Re: programs not running under strace Message-ID: <20030530201058.GA56916@dan.emsphone.com> In-Reply-To: <1054321418.46113.9.camel@prophecy.dyndns.org> References: <1054321418.46113.9.camel@prophecy.dyndns.org>
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In the last episode (May 30), Christopher Nehren said: > I've been having problems recently with strace. Here's example output > (no, nothing is left out): > > % strace /bin/ls > > And it doesn't print anything. I've tried building it without my CPUTYPE > /etc/make.conf variable (set to athlon-tbird; no other variables are > defined in make.conf except for the BDECFLAGS and some Perl stuff), > and I still get the same results. I'd like to be able to provide more > information, but I would probably use strace to do this in a normal > circumstance. :-) If someone can direct me to how I can retrieve more > information on the issue, I would be more than happy to employ it. If you hit ^T, does it print [iowait]? If so, I'm seeing the same thing :) It's intermittent, though. If I ru "ps axl | grep strace", I get: 75838 v5 S+ 0:00.01 strace ls 75839 v5 TL+ 0:00.00 strace ls It looks like strace forked a child, and it's hanging before it's able to run ls. If I kill -CONT 75839, the child exec's ls and strace traces it just fine. -- Dan Nelson dnelson@allantgroup.com
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