1178476Sjb#/bin/ksh -p
2178476Sjb#
3178476Sjb# CDDL HEADER START
4178476Sjb#
5178476Sjb# The contents of this file are subject to the terms of the
6178476Sjb# Common Development and Distribution License (the "License").
7178476Sjb# You may not use this file except in compliance with the License.
8178476Sjb#
9178476Sjb# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10178476Sjb# or http://www.opensolaris.org/os/licensing.
11178476Sjb# See the License for the specific language governing permissions
12178476Sjb# and limitations under the License.
13178476Sjb#
14178476Sjb# When distributing Covered Code, include this CDDL HEADER in each
15178476Sjb# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16178476Sjb# If applicable, add the following below this CDDL HEADER, with the
17178476Sjb# fields enclosed by brackets "[]" replaced with your own identifying
18178476Sjb# information: Portions Copyright [yyyy] [name of copyright owner]
19178476Sjb#
20178476Sjb# CDDL HEADER END
21178476Sjb#
22178476Sjb
23178476Sjb#
24178476Sjb# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
25178476Sjb# Use is subject to license terms.
26178476Sjb#
27178476Sjb# ident	"%Z%%M%	%I%	%E% SMI"
28178476Sjb
29178476Sjb#
30178476Sjb# This script verifies that user-land stacks can be walked safely
31178476Sjb# when the trapstat(1M) utility is running. An arbitrary program, w(1),
32178476Sjb# is started once a second to ensure stacks can be walked at all stages
33178476Sjb# of the process lifecycle.
34178476Sjb#
35178476Sjb
36178476Sjbscript()
37178476Sjb{
38178476Sjb        $dtrace -o $dtraceout -s /dev/stdin <<EOF
39178476Sjb        fbt:::
40178476Sjb        {
41178476Sjb                @[ustackdepth] = count();
42178476Sjb        }
43178476SjbEOF
44178476Sjb}
45178476Sjb
46178476Sjbrun_commands()
47178476Sjb{
48178476Sjb	cnt=0
49178476Sjb
50178476Sjb	while [ $cnt -lt 10 ]; do
51178476Sjb		w > /dev/null
52178476Sjb		sleep 1
53178476Sjb		cnt=$(($cnt+1))	
54178476Sjb	done
55178476Sjb}
56178476Sjb
57178476Sjbif [ $# != 1 ]; then
58178476Sjb        echo expected one argument: '<'dtrace-path'>'
59178476Sjb        exit 2
60178476Sjbfi
61178476Sjb
62178476Sjbdtrace=$1
63178476Sjbdtraceout=/tmp/dtrace.out.$$
64178476Sjbscript 2>/dev/null &
65178476Sjbtimeout=15
66178476Sjb
67178476Sjb#
68178476Sjb# Sleep while the above script fires into life. To guard against dtrace dying
69178476Sjb# and us sleeping forever we allow 15 secs for this to happen. This should be
70178476Sjb# enough for even the slowest systems.
71178476Sjb#
72178476Sjbwhile [ ! -f $dtraceout ]; do
73178476Sjb        sleep 1
74178476Sjb        timeout=$(($timeout-1))
75178476Sjb        if [ $timeout -eq 0 ]; then
76178476Sjb                echo "dtrace failed to start. Exiting."
77178476Sjb                exit 1
78178476Sjb        fi
79178476Sjbdone
80178476Sjb
81178476Sjbrun_commands &
82178476Sjbtrapstat -t 1 10
83178476Sjbstatus=$?
84178476Sjb
85178476Sjbrm $dtraceout
86178476Sjb
87178476Sjbexit $status
88