linux-kernel - [PATCH v2 18/32] selftests/ftrace: Add kprobe profile testcase

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Message-Id: <153443746121.23257.10702848396185197484.stgit@devbox>
Date:   Fri, 17 Aug 2018 01:37:41 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Shuah Khan <shuah@...nel.org>, Steven Rostedt <rostedt@...dmis.org>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 18/32] selftests/ftrace: Add kprobe profile testcase

Add a testcase for testing kprobe_profile interface
which provides per-kprobe event hit/misshit counts.

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
 .../selftests/ftrace/test.d/kprobe/profile.tc      |   15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/profile.tc

diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/profile.tc b/tools/testing/selftests/ftrace/test.d/kprobe/profile.tc
new file mode 100644
index 000000000000..0384b525cdee
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/profile.tc
@@ -0,0 +1,15 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Kprobe dynamic event - adding and removing
+
+[ -f kprobe_events ] || exit_unsupported # this is configurable
+
+! grep -q 'myevent' kprobe_profile
+echo p:myevent _do_fork > kprobe_events
+grep -q 'myevent[[:space:]]*0[[:space:]]*0$' kprobe_profile
+echo 1 > events/kprobes/myevent/enable
+( echo "forked" )
+grep -q 'myevent[[:space:]]*[[:digit:]]*[[:space:]]*0$' kprobe_profile
+echo 0 > events/kprobes/myevent/enable
+echo > kprobe_events
+! grep -q 'myevent' kprobe_profile