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# Copyright (c) 2014-2017 The strace developers. 7# All rights reserved. 8# 9# Redistribution and use in source and binary forms, with or without 10# modification, are permitted provided that the following conditions 11# are met: 12# 1. Redistributions of source code must retain the above copyright 13# notice, this list of conditions and the following disclaimer. 14# 2. Redistributions in binary form must reproduce the above copyright 15# notice, this list of conditions and the following disclaimer in the 16# documentation and/or other materials provided with the distribution. 17# 3. The name of the author may not be used to endorse or promote products 18# derived from this software without specific prior written permission. 19# 20# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31. "${srcdir=.}/init.sh" 32 33run_prog_skip_if_failed \ 34 kill -0 $$ 35 36check_prog sleep 37 38$STRACE -d -enone / > /dev/null 2> "$LOG" 39if grep -x "[^:]*strace: PTRACE_SEIZE doesn't work" "$LOG" > /dev/null; then 40 skip_ "PTRACE_SEIZE doesn't work" 41fi 42 43set -e 44 45> "$LOG" 46../set_ptracer_any sleep $((2*$TIMEOUT_DURATION)) > "$LOG" & 47 48while ! [ -s "$LOG" ]; do 49 kill -0 $! 2> /dev/null || 50 fail_ 'set_ptracer_any sleep failed' 51 $SLEEP_A_BIT 52done 53 54tracee_pid=$! 55kill -STOP $tracee_pid 56 57cleanup() 58{ 59 set +e 60 kill $tracee_pid 61 kill -CONT $tracee_pid 62 wait $tracee_pid 2> /dev/null 63 return 0 64} 65 66> "$LOG" 67$STRACE -p $tracee_pid 2> "$LOG" & 68 69while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do 70 kill -0 $! 2> /dev/null || { 71 cleanup 72 dump_log_and_fail_with "$STRACE -p failed to attach" 73 } 74 $SLEEP_A_BIT 75done 76 77while ! grep -F -e '--- stopped by ' "$LOG" > /dev/null; do 78 kill -0 $! 2> /dev/null || { 79 cleanup 80 dump_log_and_fail_with "$STRACE -p missed stop notifications" 81 } 82 $SLEEP_A_BIT 83done 84 85kill -INT $! 86wait $! 87 88grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || { 89 cleanup 90 dump_log_and_fail_with "$STRACE -p failed to detach" 91} 92 93if [ -f /proc/self/status ]; then 94 $SLEEP_A_BIT 95 test -d /proc/$tracee_pid || { 96 cleanup 97 dump_log_and_fail_with 'tracee died after detach' 98 } 99 grep_pid_status "$tracee_pid" '^State:.*T (stopped)' > /dev/null || { 100 grep_pid_status "$tracee_pid" '^State:' 101 cleanup 102 dump_log_and_fail_with 'tracee is not group-stopped after detach' 103 } 104fi 105 106cleanup 107exit 0 108