Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.3 KiB
Bash
Executable File
53 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
|
|
# perf trace exit race
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
# Check that the last events of a perf trace'd subprocess are not
|
|
# lost. Specifically, trace the exiting syscall of "true" 10 times and ensure
|
|
# the output contains 10 correct lines.
|
|
|
|
# shellcheck source=lib/probe.sh
|
|
. "$(dirname $0)"/lib/probe.sh
|
|
|
|
skip_if_no_perf_trace || exit 2
|
|
[ "$(id -u)" = 0 ] || exit 2
|
|
|
|
if [ "$1" = "-v" ]; then
|
|
verbose="1"
|
|
fi
|
|
|
|
iter=10
|
|
regexp=" +[0-9]+\.[0-9]+ [0-9]+ syscalls:sys_enter_exit_group\(\)$"
|
|
|
|
trace_shutdown_race() {
|
|
for _ in $(seq $iter); do
|
|
perf trace --no-comm -e syscalls:sys_enter_exit_group true 2>>$file
|
|
done
|
|
result="$(grep -c -E "$regexp" $file)"
|
|
[ $result = $iter ]
|
|
}
|
|
|
|
|
|
file=$(mktemp /tmp/temporary_file.XXXXX)
|
|
|
|
# Do not use whatever ~/.perfconfig file, it may change the output
|
|
# via trace.{show_timestamp,show_prefix,etc}
|
|
export PERF_CONFIG=/dev/null
|
|
|
|
trace_shutdown_race
|
|
err=$?
|
|
|
|
if [ $err != 0 ] && [ "${verbose}" = "1" ]; then
|
|
lines_not_matching=$(mktemp /tmp/temporary_file.XXXXX)
|
|
if grep -v -E "$regexp" $file > $lines_not_matching ; then
|
|
echo "Lines not matching the expected regexp: '$regexp':"
|
|
cat $lines_not_matching
|
|
else
|
|
echo "Missing output, expected $iter but only got $result"
|
|
fi
|
|
rm -f $lines_not_matching
|
|
fi
|
|
|
|
rm -f ${file}
|
|
exit $err
|