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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later OR copyleft-next-0.3.1
# Copyright (C) 2023 Luis Chamberlain <mcgrof@kernel.org>
#
# This is a stress test script for kallsyms through find_symbol()
set -e
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
test_reqs()
{
if ! which modprobe 2> /dev/null > /dev/null; then
echo "$0: You need modprobe installed" >&2
exit $ksft_skip
fi
if ! which kmod 2> /dev/null > /dev/null; then
echo "$0: You need kmod installed" >&2
exit $ksft_skip
fi
if ! which perf 2> /dev/null > /dev/null; then
echo "$0: You need perf installed" >&2
exit $ksft_skip
fi
uid=$(id -u)
if [ $uid -ne 0 ]; then
echo $msg must be run as root >&2
exit $ksft_skip
fi
}
load_mod()
{
local STATS="-e duration_time"
STATS="$STATS -e user_time"
STATS="$STATS -e system_time"
STATS="$STATS -e page-faults"
local MOD=$1
local ARCH="$(uname -m)"
case "${ARCH}" in
x86_64)
perf stat $STATS $MODPROBE $MOD
;;
*)
time $MODPROBE $MOD
exit 1
;;
esac
}
remove_all()
{
$MODPROBE -r test_kallsyms_b
for i in a b c d; do
$MODPROBE -r test_kallsyms_$i
done
}
test_reqs
MODPROBE=$(</proc/sys/kernel/modprobe)
remove_all
load_mod test_kallsyms_b
remove_all
# Now pollute the namespace
$MODPROBE test_kallsyms_c
load_mod test_kallsyms_b
# Now pollute the namespace with twice the number of symbols than the last time
remove_all
$MODPROBE test_kallsyms_c
$MODPROBE test_kallsyms_d
load_mod test_kallsyms_b
exit 0
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