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# ident "%Z%%M% %I% %E% SMI" 28 29# 30# This script verifies that user-land stacks can be walked safely 31# when the trapstat(1M) utility is running. An arbitrary program, w(1), 32# is started once a second to ensure stacks can be walked at all stages 33# of the process lifecycle. 34# 35 36script() 37{ 38 $dtrace -o $dtraceout -s /dev/stdin <<EOF 39 fbt::: 40 { 41 @[ustackdepth] = count(); 42 } 43EOF 44} 45 46run_commands() 47{ 48 cnt=0 49 50 while [ $cnt -lt 10 ]; do 51 w > /dev/null 52 sleep 1 53 cnt=$(($cnt+1)) 54 done 55} 56 57if [ $# != 1 ]; then 58 echo expected one argument: '<'dtrace-path'>' 59 exit 2 60fi 61 62dtrace=$1 63dtraceout=/tmp/dtrace.out.$$ 64script 2>/dev/null & 65timeout=15 66 67# 68# Sleep while the above script fires into life. To guard against dtrace dying 69# and us sleeping forever we allow 15 secs for this to happen. This should be 70# enough for even the slowest systems. 71# 72while [ ! -f $dtraceout ]; do 73 sleep 1 74 timeout=$(($timeout-1)) 75 if [ $timeout -eq 0 ]; then 76 echo "dtrace failed to start. Exiting." 77 exit 1 78 fi 79done 80 81run_commands & 82trapstat -t 1 10 83status=$? 84 85rm $dtraceout 86 87exit $status 88