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|
#!/bin/sh
#
# Ensure that strace can detach from stopped processes.
#
# Copyright (c) 2013-2015 Dmitry V. Levin <ldv@strace.io>
# Copyright (c) 2014-2021 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0-or-later
. "${srcdir=.}/init.sh"
. "${srcdir=.}/PTRACE_SEIZE.sh"
run_prog_skip_if_failed \
kill -0 $$
check_prog sleep
trap - TERM
sleep $TIMEOUT_DURATION &
kill -TERM $!
wait $!
expected_rc=$?
set -e
> "$LOG"
../set_ptracer_any sleep $((2*$TIMEOUT_DURATION)) > "$LOG" &
while ! [ -s "$LOG" ]; do
kill -0 $! 2> /dev/null ||
fail_ 'set_ptracer_any sleep failed'
$SLEEP_A_BIT
done
tracee_pid=$!
kill -STOP $tracee_pid
cleanup()
{
set +e
kill $tracee_pid
kill -CONT $tracee_pid
wait $tracee_pid 2> /dev/null
return 0
}
> "$LOG"
$STRACE -p $tracee_pid 2> "$LOG" &
while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do
kill -0 $! 2> /dev/null || {
cleanup
dump_log_and_fail_with "$STRACE -p failed to attach"
}
$SLEEP_A_BIT
done
while ! grep -F -e '--- stopped by ' "$LOG" > /dev/null; do
kill -0 $! 2> /dev/null || {
cleanup
dump_log_and_fail_with "$STRACE -p missed stop notifications"
}
$SLEEP_A_BIT
done
kill -TERM $!
wait $! && rc=0 || rc=$?
grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || {
cleanup
dump_log_and_fail_with "$STRACE -p failed to detach"
}
[ "$rc" = "$expected_rc" ] || {
cleanup
dump_log_and_fail_with "$STRACE -p failed to terminate itself"
}
if [ -f /proc/self/status ]; then
$SLEEP_A_BIT
test -d /proc/$tracee_pid || {
cleanup
dump_log_and_fail_with 'tracee died after detach'
}
grep_pid_status "$tracee_pid" '^State:.*T (stopped)' > /dev/null || {
grep_pid_status "$tracee_pid" '^State:'
cleanup
dump_log_and_fail_with 'tracee is not group-stopped after detach'
}
fi
cleanup
exit 0
|
