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selftests: tracing: Add tprobe enable/disable testcase

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Commit 2867495dea ("tracing: tprobe-events: Register tracepoint when
enable tprobe event") caused regression bug and tprobe did not work.
To prevent similar problems, add a testcase which enables/disables a
tprobe and check the results.

Link: https://lore.kernel.org/r/176252610176.214996.3978515319000806265.stgit@devnote2
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Masami Hiramatsu (Google) 2025-11-07 23:35:01 +09:00 committed by Shuah Khan
parent d9e6269e33
commit a1ca238936
1 changed files with 40 additions and 0 deletions
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40
tools/testing/selftests/ftrace/test.d/dynevent/enable_disable_tprobe.tc Normal file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Generic dynamic event - enable/disable tracepoint probe events
# requires: dynamic_events "t[:[<group>/][<event>]] <tracepoint> [<args>]":README
echo 0 > events/enable
echo > dynamic_events
TRACEPOINT=sched_switch
ENABLEFILE=events/tracepoints/myprobe/enable
:;: "Add tracepoint event on $TRACEPOINT" ;:
echo "t:myprobe ${TRACEPOINT}" >> dynamic_events
:;: "Check enable/disable to ensure it works" ;:
echo 1 > $ENABLEFILE
grep -q $TRACEPOINT trace
echo 0 > $ENABLEFILE
echo > trace
! grep -q $TRACEPOINT trace
:;: "Repeat enable/disable to ensure it works" ;:
echo 1 > $ENABLEFILE
grep -q $TRACEPOINT trace
echo 0 > $ENABLEFILE
echo > trace
! grep -q $TRACEPOINT trace
exit 0