#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Generic dynamic event - add/remove multiple fprobe events on the same function
# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]":README enabled_functions

echo 0 > events/enable
echo > dynamic_events

PLACE=vfs_read
PLACE2=vfs_open

:;: 'Ensure no other ftrace user' ;:
test `cat enabled_functions | wc -l` -eq 0 || exit_unresolved

:;: 'Test case 1: leave entry event' ;:
:;: 'Add entry and exit events on the same place' ;:
echo "f:event1 ${PLACE}" >> dynamic_events
echo "f:event2 ${PLACE}%return" >> dynamic_events

:;: 'Enable both of them' ;:
echo 1 > events/fprobes/enable
test `cat enabled_functions | wc -l` -eq 1

:;: 'Disable and remove exit event' ;:
echo 0 > events/fprobes/event2/enable
echo -:event2 >> dynamic_events

:;: 'Disable and remove all events' ;:
echo 0 > events/fprobes/enable
echo > dynamic_events

:;: 'Add another event' ;:
echo "f:event3 ${PLACE2}%return" > dynamic_events
echo 1 > events/fprobes/enable
test `cat enabled_functions | wc -l` -eq 1

:;: 'No other ftrace user' ;:
echo 0 > events/fprobes/enable
echo > dynamic_events
test `cat enabled_functions | wc -l` -eq 0

:;: 'Test case 2: leave exit event' ;:
:;: 'Add entry and exit events on the same place' ;:
echo "f:event1 ${PLACE}" >> dynamic_events
echo "f:event2 ${PLACE}%return" >> dynamic_events

:;: 'Enable both of them' ;:
echo 1 > events/fprobes/enable
test `cat enabled_functions | wc -l` -eq 1

:;: 'Disable and remove entry event' ;:
echo 0 > events/fprobes/event1/enable
echo -:event1 >> dynamic_events

:;: 'Disable and remove all events' ;:
echo 0 > events/fprobes/enable
echo > dynamic_events

:;: 'Add another event' ;:
echo "f:event3 ${PLACE2}" > dynamic_events
echo 1 > events/fprobes/enable
test `cat enabled_functions | wc -l` -eq 1

:;: 'No other ftrace user' ;:
echo 0 > events/fprobes/enable
echo > dynamic_events
test `cat enabled_functions | wc -l` -eq 0

clear_trace