1#/bin/ksh -p 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License (the "License"). 7# You may not use this file except in compliance with the License. 8# 9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10# or http://www.opensolaris.org/os/licensing. 11# See the License for the specific language governing permissions 12# and limitations under the License. 13# 14# When distributing Covered Code, include this CDDL HEADER in each 15# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16# If applicable, add the following below this CDDL HEADER, with the 17# fields enclosed by brackets "[]" replaced with your own identifying 18# information: Portions Copyright [yyyy] [name of copyright owner] 19# 20# CDDL HEADER END 21# 22 23# 24# Copyright 2007 Sun Microsystems, Inc. All rights reserved. 25# Use is subject to license terms. 26# 27 28# 29# This script verifies that user-land stacks can be walked safely 30# when the trapstat(8) utility is running. An arbitrary program, w(1), 31# is started once a second to ensure stacks can be walked at all stages 32# of the process lifecycle. 33# 34 35script() 36{ 37 $dtrace -o $dtraceout -s /dev/stdin <<EOF 38 fbt::: 39 { 40 @[ustackdepth] = count(); 41 } 42EOF 43} 44 45run_commands() 46{ 47 cnt=0 48 49 while [ $cnt -lt 10 ]; do 50 w > /dev/null 51 sleep 1 52 cnt=$(($cnt+1)) 53 done 54} 55 56if [ $# != 1 ]; then 57 echo expected one argument: '<'dtrace-path'>' 58 exit 2 59fi 60 61dtrace=$1 62dtraceout=/tmp/dtrace.out.$$ 63script 2>/dev/null & 64timeout=15 65 66# 67# Sleep while the above script fires into life. To guard against dtrace dying 68# and us sleeping forever we allow 15 secs for this to happen. This should be 69# enough for even the slowest systems. 70# 71while [ ! -f $dtraceout ]; do 72 sleep 1 73 timeout=$(($timeout-1)) 74 if [ $timeout -eq 0 ]; then 75 echo "dtrace failed to start. Exiting." 76 exit 1 77 fi 78done 79 80run_commands & 81trapstat -t 1 10 82status=$? 83 84rm $dtraceout 85 86exit $status 87