Date: Fri, 17 Feb 2017 14:14:31 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 217174] dtrace does not cleanup probes Message-ID: <bug-217174-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217174 Bug ID: 217174 Summary: dtrace does not cleanup probes Product: Base System Version: 10.3-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: daniel.genis@gmx.de Created attachment 180077 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D180077&action= =3Dedit DTrace script causing problem Running and stopping a DTrace script, may leave a "ftcleanup" process behin= d in "DL" state, ps afux output: root 820 0.0 0.0 0 16 - DL 1:43PM 0:00.01 [ftcleanup] Perl scripts (for some reason) notice this and show the following warning afterwards: WARNING: number of probes fixed does not match the number of defined probes= (16 !=3D 18, respectively) WARNING: some probes might not fire or your program might crash This is reproducible on 10.3-STABLE and 10.3-RELEASE, and may take two or t= hree attempts if it doesn't occur on the first attempt. How to reproduce: 1. Execute attached dtracte script. 2. Stop executed dtrace script. 3. Check ps afux for kernel ftcleanup process 4. Repeat above until bug is triggered (2-3 times total should be enough) Any perl script subsequently will print the following warning on stderr, li= ke this script for example: ``` #!/usr/local/bin/perl print "Test"; ``` WARNING: number of probes fixed does not match the number of defined probes= (16 !=3D 18, respectively) WARNING: some probes might not fire or your program might crash I can also reproduce this with other dtrace scripts, like this one: https://gist.github.com/genisd/72db1d98b64d9d7127570fff7d4b89f6 I don't know how big the implications are. One of our automation scripts di= es due to the stderr output (it checks on that). --=20 You are receiving this mail because: You are the assignee for the bug.=
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