1#!/bin/sh 2# 3# Ensure that strace can detach from stopped 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 37$STRACE -d -enone / > /dev/null 2> "$LOG" 38if grep -x "[^:]*strace: PTRACE_SEIZE doesn't work" "$LOG" > /dev/null; then 39 skip_ "PTRACE_SEIZE doesn't work" 40fi 41 42set -e 43 44rm -f "$LOG" 45./set_ptracer_any sleep $((2*$TIMEOUT_DURATION)) > "$LOG" & 46 47while ! [ -s "$LOG" ]; do 48 kill -0 $! 2> /dev/null || 49 fail_ 'set_ptracer_any sleep failed' 50 $SLEEP_A_BIT 51done 52 53tracee_pid=$! 54kill -STOP $tracee_pid 55 56cleanup() 57{ 58 set +e 59 kill $tracee_pid 60 kill -CONT $tracee_pid 61 wait $tracee_pid 2> /dev/null 62 return 0 63} 64 65rm -f "$LOG" 66$STRACE -p $tracee_pid 2> "$LOG" & 67 68while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do 69 kill -0 $! 2> /dev/null || { 70 cleanup 71 dump_log_and_fail_with "$STRACE -p failed to attach" 72 } 73 $SLEEP_A_BIT 74done 75 76while ! grep -F -e '--- stopped by ' "$LOG" > /dev/null; do 77 kill -0 $! 2> /dev/null || { 78 cleanup 79 dump_log_and_fail_with "$STRACE -p missed stop notifications" 80 } 81 $SLEEP_A_BIT 82done 83 84kill -INT $! 85wait $! 86 87grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || { 88 cleanup 89 dump_log_and_fail_with "$STRACE -p failed to detach" 90} 91 92if [ -f /proc/self/status ]; then 93 $SLEEP_A_BIT 94 test -d /proc/$tracee_pid || { 95 cleanup 96 dump_log_and_fail_with 'tracee died after detach' 97 } 98 grep '^State:.*T (stopped)' < /proc/$tracee_pid/status > /dev/null || { 99 grep '^State:' < /proc/$tracee_pid/status 100 cleanup 101 dump_log_and_fail_with 'tracee is not group-stopped after detach' 102 } 103fi 104 105cleanup 106exit 0 107