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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Generic dynamic event - add/remove fprobe events
# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]":README
echo 0 > events/enable
echo > dynamic_events
PLACE=$FUNCTION_FORK
PLACE2="kmem_cache_free"
PLACE3="schedule_timeout"
# Some functions may have BPF programs attached, therefore
# count already enabled_functions before tests start
ocnt=`cat enabled_functions | wc -l`
echo "f:myevent1 $PLACE" >> dynamic_events
echo "f:myevent2 $PLACE%return" >> dynamic_events
# add another event
echo "f:myevent3 $PLACE2" >> dynamic_events
grep -q myevent1 dynamic_events
grep -q myevent2 dynamic_events
grep -q myevent3 dynamic_events
test -d events/fprobes/myevent1
test -d events/fprobes/myevent2
echo 1 > events/fprobes/myevent1/enable
# Make sure the event is attached and is the only one
grep -q $PLACE enabled_functions
cnt=`cat enabled_functions | wc -l`
if [ $cnt -ne $((ocnt + 1)) ]; then
exit_fail
fi
echo 1 > events/fprobes/myevent2/enable
# It should till be the only attached function
cnt=`cat enabled_functions | wc -l`
if [ $cnt -ne $((ocnt + 1)) ]; then
exit_fail
fi
echo 1 > events/fprobes/myevent3/enable
# If the function is different, the attached function should be increased
grep -q $PLACE2 enabled_functions
cnt=`cat enabled_functions | wc -l`
if [ $cnt -ne $((ocnt + 2)) ]; then
exit_fail
fi
echo 0 > events/fprobes/myevent2/enable
echo "-:myevent2" >> dynamic_events
grep -q myevent1 dynamic_events
! grep -q myevent2 dynamic_events
# should still have 2 left
cnt=`cat enabled_functions | wc -l`
if [ $cnt -ne $((ocnt + 2)) ]; then
exit_fail
fi
echo 0 > events/fprobes/enable
echo > dynamic_events
# Should have none left
cnt=`cat enabled_functions | wc -l`
if [ $cnt -ne $ocnt ]; then
exit_fail
fi
echo "f:myevent4 $PLACE" >> dynamic_events
echo 1 > events/fprobes/myevent4/enable
# Should only have one enabled
cnt=`cat enabled_functions | wc -l`
if [ $cnt -ne $((ocnt + 1)) ]; then
exit_fail
fi
echo 0 > events/fprobes/enable
echo > dynamic_events
# Should have none left
cnt=`cat enabled_functions | wc -l`
if [ $cnt -ne $ocnt ]; then
exit_fail
fi
clear_trace
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