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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Test ftrace direct functions against kprobes
# requires: kprobe_events
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
echo "Let the module run a little"
sleep 1
grep -q "my_direct_func: waking 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: waking 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
}
test_kprobes() {
# 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
}
test_kprobes
# Now do this with a second registered direct function
echo "Running with another ftrace direct function"
modprobe ftrace-direct-too
test_kprobes
rmmod ftrace-direct-too
echo > kprobe_events
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