Date: Mon, 4 Nov 2013 16:56:43 +0800 From: John Luk <john.37@gmail.com> To: Mark Johnston <markj@freebsd.org>, freebsd-dtrace@freebsd.org Subject: Re: dtrace showed matched probes but nothing in output on FreeBSD 9.1-RELEASE Message-ID: <CAHkCX6iT2MKMRwQDQrWLLjMXx9kiiYneT4J_qirxn1EwshmGng@mail.gmail.com> In-Reply-To: <CAHkCX6h312PJvukGo_MNowNpENDLT=hvmXymZRsDFW%2BtzYNPug@mail.gmail.com> References: <CAHkCX6j1H4cxeb255gdH_cLop5Lv0xJABbuma%2B835gNNq-Nshg@mail.gmail.com> <20131103235936.GB15661@raichu> <CAHkCX6g1jUirMDP4T7W%2BrP6P8JV5wF-Wsa984op_HP1WftSitA@mail.gmail.com> <20131104043519.GB8007@raichu> <CAHkCX6h312PJvukGo_MNowNpENDLT=hvmXymZRsDFW%2BtzYNPug@mail.gmail.com>
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EDIT:Apologies for miss-sent mail. Great! Seems that we're on the right way, I got the output below: # dtrace -s ufunc.d -c ./a.out a.out dtrace: script 'ufunc.d' matched 5 probes ^C foo 1 foo1 1 main 1 through the inet_makeaddr was missing. I applied the patch with: patch < libproc_sym_lookup-9.1.diff Thanks again for your patch, Mark :) Cheers, spin6lock 2013/11/4 John Luk <john.37@gmail.com>: > Great! Seems that we're on the right way, I got the output below: > > # dtrace -s ufunc.d -c ./a.out a.out > dtrace: script 'ufunc.d' matched 5 probes > ^C > > foo 1 > foo1 1 > main 1 > > through the inet_makeaddr was missing. I applied the patch with: > > patch < libproc_sym_lookup-9.1.diff > > Thanks again for your patch, Mark :) > > Cheers, > spin6lock > > > 2013/11/4 Mark Johnston <markj@freebsd.org>: >> On Mon, Nov 04, 2013 at 12:11:55PM +0800, John Luk wrote: >>> Thanks, Mark. But I still got nothing :( >>> The line number of your patch wasn't match with mine, I patched it >>> on hand. Was it because I was on an older version of src? The head >>> of proc_sym.c shows: >>> >>> $FreeBSD: release/9.1.0/lib/libproc/proc_sym.c 211184 2010-08-11 >>> 17:33:26Z rpaulo >>> >>> And the patch of mine is include below, is it correct? >> >> Sorry, I missed that you were on 9.1. The patch you pasted had a mistake >> in it; can you instead try applying the patch here: >> >> http://people.freebsd.org/~markj/patches/libproc_sym_lookup-9.1.diff >> >> I created it against the 9.1 tree, so it should apply cleanly. I built and >> installed the patched 9.1 libproc on a machine running head, and got the >> expected behaviour: >> >> mark@raichu: ~/src/dtrace/ufunc $ sudo dtrace -s ufunc.d -c ./test test >> dtrace: script 'ufunc.d' matched 9 probes >> dtrace: pid 11555 has exited >> >> __do_global_dtors_aux 1 >> foo 1 >> foo1 1 >> inet_makeaddr 1 >> main 1 >> >> mark@raichu: ~/src/dtrace/ufunc $ >> >> I don't think that this will be the final patch; checking for ET_EXEC to >> determine whether to add a relocation offset seems a bit dubious; I'm >> pretty sure it won't work for position-independent executables. >> >> Thanks, >> -Mark >> >>> >>> [...] >>>
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