Commit 453553e1 authored by Masami Hiramatsu (Google)'s avatar Masami Hiramatsu (Google)
Browse files

selftests/ftrace: Add a testcase for multiple fprobe events 

Add a testcase for multiple fprobe events on the same function
so that it clears ftrace hash map correctly when removing the
events.

Link: https://lore.kernel.org/all/177669370353.132053.16801520791509406141.stgit@mhiramat.tok.corp.google.com/



Signed-off-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
parent 132001e9

tools/testing/selftests/ftrace/test.d/dynevent/add_remove_multiple_fprobe.tc

0 → 100644
+69 −0
Original line number Diff line number Diff line 
#!/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