ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#/bin/ksh -p
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# CDDL HEADER START
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# The contents of this file are subject to the terms of the
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# Common Development and Distribution License (the "License").
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# You may not use this file except in compliance with the License.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# or http://www.opensolaris.org/os/licensing.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# See the License for the specific language governing permissions
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# and limitations under the License.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# When distributing Covered Code, include this CDDL HEADER in each
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# If applicable, add the following below this CDDL HEADER, with the
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# fields enclosed by brackets "[]" replaced with your own identifying
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# information: Portions Copyright [yyyy] [name of copyright owner]
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# CDDL HEADER END
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# Copyright 2007 Sun Microsystems, Inc. All rights reserved.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# Use is subject to license terms.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# ident "%Z%%M% %I% %E% SMI"
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# This script verifies that user-land stacks can be walked safely
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# when the trapstat(1M) utility is running. An arbitrary program, w(1),
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# is started once a second to ensure stacks can be walked at all stages
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# of the process lifecycle.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamscript()
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam{
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam $dtrace -o $dtraceout -s /dev/stdin <<EOF
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam fbt:::
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam {
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam @[ustackdepth] = count();
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam }
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamEOF
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam}
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamrun_commands()
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam{
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam cnt=0
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam while [ $cnt -lt 10 ]; do
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam w > /dev/null
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam sleep 1
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam cnt=$(($cnt+1))
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam done
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam}
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamif [ $# != 1 ]; then
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam echo expected one argument: '<'dtrace-path'>'
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam exit 2
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamfi
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamdtrace=$1
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamdtraceout=/tmp/dtrace.out.$$
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamscript 2>/dev/null &
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamtimeout=15
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# Sleep while the above script fires into life. To guard against dtrace dying
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# and us sleeping forever we allow 15 secs for this to happen. This should be
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam# enough for even the slowest systems.
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam#
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamwhile [ ! -f $dtraceout ]; do
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam sleep 1
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam timeout=$(($timeout-1))
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam if [ $timeout -eq 0 ]; then
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam echo "dtrace failed to start. Exiting."
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam exit 1
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam fi
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamdone
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamrun_commands &
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamtrapstat -t 1 10
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamstatus=$?
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamrm $dtraceout
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslam
ac20c57d6652cecf7859e3346336b9a48e5d5f82jhaslamexit $status