Date: Sun, 12 Sep 2010 15:40:54 +0000 From: Alexander Best <arundel@freebsd.org> To: Mateusz Guzik <mjguzik@gmail.com> Cc: Yuri <yuri@rawbw.com>, Jilles Tjoelker <jilles@stack.nl>, freebsd-hackers@freebsd.org Subject: Re: Why I can't trace linux process's childs with truss? Message-ID: <20100912154054.GA42409@freebsd.org> In-Reply-To: <AANLkTikiWs9O%2B8%2BmwOaE4nVovT0yDQ3GvPO7E9H_MWkW@mail.gmail.com> References: <4C8A81D9.5020905@rawbw.com> <20100910194600.GB60815@stack.nl> <20100912130801.GA23538@freebsd.org> <AANLkTikiWs9O%2B8%2BmwOaE4nVovT0yDQ3GvPO7E9H_MWkW@mail.gmail.com>
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On Sun Sep 12 10, Mateusz Guzik wrote: > On Sun, Sep 12, 2010 at 3:08 PM, Alexander Best <arundel@freebsd.org> wrote: > > there's a PR related to this "issue" [1]. so is truss missing this > > functionality or is this in fact a feature, because truss musn't be used on > > any non freebsd executable? > > > > Actually truss handles linux processes just fine, except for their children. :) > Linux process can create a child using linux_clone syscall, but truss does not > handle that case and this can be the problem that Yuri reported (since > no log was > provided, I can only guess). > > This trivial patch should fix this: > http://student.agh.edu.pl/~mjguzik/truss-linux-forks.patch > > Tested on this simple program: > http://student.agh.edu.pl/~mjguzik/fork.c > > If it still does not work, log generated by truss would be helfpul. looking good. could be post that patch as followup to yuri's PR? hope it gets committed soon. :) cheers. alex > > Regards, > -- > Mateusz Guzik -- a13x
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