1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2021 Peter Holm 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# Trace random cc, c++ or make threads from a buildkernel 31# Test scenario idea by kib@ 32 33old=`sysctl -in kern.kill_on_debugger_exit` 34[ -z "$old" ] && exit 0 35trap "sysctl kern.kill_on_debugger_exit=$old" EXIT INT 36 37# Enable ptrace(2)d processes to continue 38sysctl kern.kill_on_debugger_exit=0 39./buildkernel.sh & kpid=$! 40while true; do 41 for i in `jot 8`; do 42 rpid=`ps -l | grep -vwE 'grep|RE|defunct' | \ 43 grep -E "(cc|c\+\+|make) " | \ 44 sort -R | head -1 | awk '{print $2}'` 45 [ -n "$rpid" ] && break 46 sleep 1 47 done 48 [ -z "$rpid" ] && break 49 kill -0 $rpid 2>/dev/null || continue 50 ps -lp $rpid | tail -1 51 echo "truss -f -o /dev/null -p $rpid" 52 truss -f -o /dev/null -p $rpid & tpid=$! 53 sleep `jot -r 1 5 10` 54 pkill -9 truss 55 wait $tpid 56done 57wait $kpid 58exit $? 59