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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Generic dynamic event - add/remove tracepoint probe events on module
# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README
rmmod trace-events-sample ||:
if ! modprobe trace-events-sample ; then
echo "No trace-events sample module - please make CONFIG_SAMPLE_TRACE_EVENTS=m"
exit_unresolved;
fi
trap "rmmod trace-events-sample" EXIT
echo 0 > events/enable
echo > dynamic_events
TRACEPOINT1=foo_bar
TRACEPOINT2=foo_bar_with_cond
echo "t:myevent1 $TRACEPOINT1" >> dynamic_events
echo "t:myevent2 $TRACEPOINT2" >> dynamic_events
grep -q myevent1 dynamic_events
grep -q myevent2 dynamic_events
test -d events/tracepoints/myevent1
test -d events/tracepoints/myevent2
echo "-:myevent2" >> dynamic_events
grep -q myevent1 dynamic_events
! grep -q myevent2 dynamic_events
echo > dynamic_events
clear_trace
:;: "Try to put a probe on a tracepoint in non-loaded module" ;:
rmmod trace-events-sample
echo "t:myevent1 $TRACEPOINT1" >> dynamic_events
echo "t:myevent2 $TRACEPOINT2" >> dynamic_events
grep -q myevent1 dynamic_events
grep -q myevent2 dynamic_events
test -d events/tracepoints/myevent1
test -d events/tracepoints/myevent2
echo 1 > events/tracepoints/enable
modprobe trace-events-sample
sleep 2
grep -q "myevent1" trace
grep -q "myevent2" trace
rmmod trace-events-sample
trap "" EXIT
echo 0 > events/tracepoints/enable
echo > dynamic_events
clear_trace
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