1#!/bin/sh
2#
3# Ensure that strace can detach from running 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
38set -e
39
40../set_ptracer_any sh -c "echo > $LOG; while :; do :; done" > /dev/null &
41
42while ! [ -s "$LOG" ]; do
43	kill -0 $! 2> /dev/null ||
44		fail_ 'set_ptracer_any sh failed'
45	$SLEEP_A_BIT
46done
47
48tracee_pid=$!
49
50cleanup()
51{
52	set +e
53	kill $tracee_pid
54	wait $tracee_pid 2> /dev/null
55	return 0
56}
57
58$STRACE -p $tracee_pid 2> "$LOG" &
59
60while ! grep -F "Process $tracee_pid attached" "$LOG" > /dev/null; do
61	kill -0 $! 2> /dev/null || {
62		cleanup
63		dump_log_and_fail_with "$STRACE -p failed to attach"
64	}
65	$SLEEP_A_BIT
66done
67
68kill -INT $!
69wait $!
70
71grep -F "Process $tracee_pid detached" "$LOG" > /dev/null || {
72		cleanup
73		dump_log_and_fail_with "$STRACE -p failed to detach"
74	}
75
76if [ -f /proc/self/status ]; then
77	$SLEEP_A_BIT
78	test -d /proc/$tracee_pid || {
79		cleanup
80		dump_log_and_fail_with 'tracee died after detach'
81	}
82	grep_pid_status "$tracee_pid" '^State:.*R (running)' > /dev/null || {
83		grep_pid_status "$tracee_pid" '^State:'
84		cleanup
85		dump_log_and_fail_with 'tracee is not running after detach'
86	}
87fi
88
89cleanup
90exit 0
91