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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Test ftrace direct functions against kprobes

rmmod ftrace-direct ||:
if ! modprobe ftrace-direct ; then
  echo "No ftrace-direct sample module - please build with CONFIG_SAMPLE_FTRACE_DIRECT=m"
  exit_unresolved;
fi

if [ ! -f kprobe_events ]; then
	echo "No kprobe_events file -please build CONFIG_KPROBE_EVENTS"
	exit_unresolved;
fi

echo "Let the module run a little"
sleep 1

grep -q "my_direct_func: wakeing up" trace

rmmod ftrace-direct

echo 'p:kwake wake_up_process task=$arg1' > kprobe_events

start_direct() {
	echo > trace
	modprobe ftrace-direct
	sleep 1
	grep -q "my_direct_func: wakeing up" trace
}

stop_direct() {
	rmmod ftrace-direct
}

enable_probe() {
	echo > trace
	echo 1 > events/kprobes/kwake/enable
	sleep 1
	grep -q "kwake:" trace
}

disable_probe() {
	echo 0 > events/kprobes/kwake/enable
}

# probe -> direct -> no direct > no probe
enable_probe
start_direct
stop_direct
disable_probe

# probe -> direct -> no probe > no direct
enable_probe
start_direct
disable_probe
stop_direct

# direct -> probe -> no probe > no direct
start_direct
enable_probe
disable_probe
stop_direct

# direct -> probe -> no direct > no noprobe
start_direct
enable_probe
stop_direct
disable_probe

echo > kprobe_events