strace/tests/attach-f-p.test

#!/bin/sh
#
# Check that -f -p attaches to threads properly.
#
# Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
#    derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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. "${srcdir=.}/init.sh"

# strace -f -p is implemented using /proc/$pid/task/
[ -d /proc/self/task/ ] ||
	framework_skip_ '/proc/self/task/ is not available'
run_prog_skip_if_failed \
	kill -0 $$
run_prog ./attach-f-p > /dev/null 3>&1

./set_ptracer_any sh -c "exec ./attach-f-p > $EXP 3> $OUT" > /dev/null &
tracee_pid=$!

while ! [ -s "$OUT" ]; do
	kill -0 $tracee_pid 2> /dev/null ||
		fail_ 'set_ptracer_any sleep failed'
done

run_strace -a32 -f -echdir -esignal=none -p $tracee_pid
match_diff "$LOG" "$EXP"
rm -f "$EXP" "$OUT"