#!/bin/bash

SCRIPTDIR="$(readlink -f $(dirname $(type -p $0)))"
ROOTDIR="$(readlink -f $SCRIPTDIR/../..)"
KPATCH="sudo $ROOTDIR/kpatch/kpatch"

set -o errexit

die() {
	echo "ERROR: $@" >&2
	exit 1
}

ko_to_test() {
	tmp=${1%.ko}-LOADED.test
	echo ${tmp##kpatch-}
}

test_replace() {
	$KPATCH load $1
	$KPATCH replace $2
	test1=$(ko_to_test $1)
	test2=$(ko_to_test $2)
	./$test1 && die "./$test1 succeeded after $1 was replaced by $2"
	./$test2 || die "./$test2 failed after $1 was replaced by $2"
	$KPATCH unload $2
}

# subset
test_replace kpatch-meminfo-cmdline.ko kpatch-cmdline-string.ko

# disjoint
test_replace kpatch-cmdline-string.ko kpatch-meminfo-string.ko
test_replace kpatch-meminfo-string.ko kpatch-cmdline-string.ko