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58 lines
2.1 KiB
Bash
Executable file
58 lines
2.1 KiB
Bash
Executable file
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2021 Peter Holm
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Trace random cc, c++ or make threads from a buildkernel
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# Test scenario idea by kib@
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old=`sysctl -in kern.kill_on_debugger_exit`
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[ -z "$old" ] && exit 0
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trap "sysctl kern.kill_on_debugger_exit=$old" EXIT INT
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# Enable ptrace(2)d processes to continue
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sysctl kern.kill_on_debugger_exit=0
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./buildkernel.sh & kpid=$!
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while true; do
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for i in `jot 8`; do
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rpid=`ps -l | grep -vwE 'grep|RE|defunct' | \
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grep -E "(cc|c\+\+|make) " | \
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sort -R | head -1 | awk '{print $2}'`
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[ -n "$rpid" ] && break
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sleep 1
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done
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[ -z "$rpid" ] && break
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kill -0 $rpid 2>/dev/null || continue
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ps -lp $rpid | tail -1
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echo "truss -f -o /dev/null -p $rpid"
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truss -f -o /dev/null -p $rpid & tpid=$!
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sleep `jot -r 1 5 10`
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pkill -9 truss
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wait $tpid
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done
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wait $kpid
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exit $?
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