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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Test ftrace direct functions against tracers
rmmod ftrace-direct ||:
if ! modprobe ftrace-direct ; then
echo "No ftrace-direct sample module - please make CONFIG_SAMPLE_FTRACE_DIRECT=m"
exit_unresolved;
fi
echo "Let the module run a little"
sleep 1
grep -q "my_direct_func: wakeing up" trace
rmmod ftrace-direct
test_tracer() {
tracer=$1
# tracer -> direct -> no direct > no tracer
echo $tracer > current_tracer
modprobe ftrace-direct
rmmod ftrace-direct
echo nop > current_tracer
# tracer -> direct -> no tracer > no direct
echo $tracer > current_tracer
modprobe ftrace-direct
echo nop > current_tracer
rmmod ftrace-direct
# direct -> tracer -> no tracer > no direct
modprobe ftrace-direct
echo $tracer > current_tracer
echo nop > current_tracer
rmmod ftrace-direct
# direct -> tracer -> no direct > no notracer
modprobe ftrace-direct
echo $tracer > current_tracer
rmmod ftrace-direct
echo nop > current_tracer
}
for t in `cat available_tracers`; do
if [ "$t" != "nop" ]; then
test_tracer $t
fi
done
echo nop > current_tracer
rmmod ftrace-direct ||:
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