Dmitry V. Levin
38a34c9349
Before this change, all files that exist since 20th century had copyright headers, while most files that appeared later didn't. This change fixes the inconsistency by adding missing copyright headers. It doesn't mean that copyright headers became maintained. In my view, git history provides much better information on this subject and is much more accurate than copyright headers.
107 lines
3.0 KiB
Bash
Executable File
107 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Ensure that strace can detach from stopped processes.
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#
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# Copyright (c) 2013-2015 Dmitry V. Levin <ldv@altlinux.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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. "${srcdir=.}/init.sh"
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run_prog_skip_if_failed \
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kill -0 $$
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check_prog sleep
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$STRACE -d -enone / > /dev/null 2> "$LOG"
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if grep -x "[^:]*strace: PTRACE_SEIZE doesn't work" "$LOG" > /dev/null; then
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skip_ "PTRACE_SEIZE doesn't work"
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fi
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set -e
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rm -f "$LOG"
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./set_ptracer_any sleep $((2*$TIMEOUT_DURATION)) > "$LOG" &
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while ! [ -s "$LOG" ]; do
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kill -0 $! 2> /dev/null ||
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fail_ 'set_ptracer_any sleep failed'
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$SLEEP_A_BIT
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done
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tracee_pid=$!
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kill -STOP $tracee_pid
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cleanup()
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{
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set +e
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kill $tracee_pid
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kill -CONT $tracee_pid
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wait $tracee_pid 2> /dev/null
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return 0
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}
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rm -f "$LOG"
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$STRACE -p $tracee_pid 2> "$LOG" &
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while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do
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kill -0 $! 2> /dev/null || {
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cleanup
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dump_log_and_fail_with "$STRACE -p failed to attach"
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}
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$SLEEP_A_BIT
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done
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while ! grep -F -e '--- stopped by ' "$LOG" > /dev/null; do
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kill -0 $! 2> /dev/null || {
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cleanup
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dump_log_and_fail_with "$STRACE -p missed stop notifications"
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}
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$SLEEP_A_BIT
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done
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kill -INT $!
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wait $!
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grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || {
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cleanup
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dump_log_and_fail_with "$STRACE -p failed to detach"
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}
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if [ -f /proc/self/status ]; then
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$SLEEP_A_BIT
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test -d /proc/$tracee_pid || {
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cleanup
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dump_log_and_fail_with 'tracee died after detach'
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}
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grep '^State:.*T (stopped)' < /proc/$tracee_pid/status > /dev/null || {
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grep '^State:' < /proc/$tracee_pid/status
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cleanup
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dump_log_and_fail_with 'tracee is not group-stopped after detach'
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}
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fi
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cleanup
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exit 0
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