1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause 5# 6# Copyright (c) 2020 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# A variation of systrace.sh 31# "Fatal trap 12: page fault while in kernel mode" seen: 32# https://people.freebsd.org/~pho/stress/log/mark142.txt 33 34[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 35. ../default.cfg 36dtrace -n 'dtrace:::BEGIN { exit(0); }' > /dev/null 2>&1 || exit 0 37 38echo "gvim or top should be running at this point" 39for i in `jot 2`; do 40 sleep 4 & pid=$! 41 dtrace -w -n 'fbt::kern_ioctl:entry {\ 42 @io[execname,probefunc] = count(); }' -p $pid > /dev/null 2>&1 43 wait $pid 44 kldstat | grep -q dtraceall.ko && kldunload dtraceall.ko 45 mount -t tmpfs dummy $mntpoint && umount $mntpoint 46done 47kldstat | grep -q tmpfs && kldunload tmpfs.ko 48exit 0 49