1#!/bin/sh 2# 3# Ensure that strace can detach from sleeping processes. 4# 5# Copyright (c) 2013-2015 Dmitry V. Levin <ldv@altlinux.org> 6# All rights reserved. 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# 3. The name of the author may not be used to endorse or promote products 17# derived from this software without specific prior written permission. 18# 19# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30. "${srcdir=.}/init.sh" 31 32run_prog_skip_if_failed \ 33 kill -0 $$ 34 35check_prog sleep 36 37set -e 38 39rm -f "$LOG" 40./set_ptracer_any sleep $((2*$TIMEOUT_DURATION)) > "$LOG" & 41 42while ! [ -s "$LOG" ]; do 43 kill -0 $! 2> /dev/null || 44 fail_ 'set_ptracer_any sleep failed' 45 $SLEEP_A_BIT 46done 47 48tracee_pid=$! 49 50cleanup() 51{ 52 set +e 53 kill $tracee_pid 54 wait $tracee_pid 2> /dev/null 55 return 0 56} 57 58rm -f "$LOG" 59$STRACE -p $tracee_pid 2> "$LOG" & 60 61while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do 62 kill -0 $! 2> /dev/null || { 63 cleanup 64 dump_log_and_fail_with "$STRACE -p failed to attach" 65 } 66 $SLEEP_A_BIT 67done 68 69kill -INT $! 70wait $! 71 72grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || { 73 cleanup 74 dump_log_and_fail_with "$STRACE -p failed to detach" 75} 76 77if [ -f /proc/self/status ]; then 78 $SLEEP_A_BIT 79 test -d /proc/$tracee_pid || { 80 cleanup 81 dump_log_and_fail_with 'tracee died after detach' 82 } 83 grep '^State:.*S (sleeping)' < /proc/$tracee_pid/status > /dev/null || { 84 grep '^State:' < /proc/$tracee_pid/status 85 cleanup 86 dump_log_and_fail_with 'tracee is not sleeping after detach' 87 } 88fi 89 90cleanup 91exit 0 92