linux-kernel - [PATCH v8 34/35] selftests/ftrace: Add a test case for repeating register/unregister fprobe

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Date: Mon, 26 Feb 2024 00:21:15 +0900
From: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
To: Alexei Starovoitov <alexei.starovoitov@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Florent Revest <revest@...omium.org>
Cc: linux-trace-kernel@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	bpf <bpf@...r.kernel.org>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Jiri Olsa <jolsa@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Alan Maguire <alan.maguire@...cle.com>,
	Mark Rutland <mark.rutland@....com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Guo Ren <guoren@...nel.org>
Subject: [PATCH v8 34/35] selftests/ftrace: Add a test case for repeating register/unregister fprobe

From: Masami Hiramatsu (Google) <mhiramat@...nel.org>

This test case repeats define and undefine the fprobe dynamic event to
ensure that the fprobe does not cause any issue with such operations.

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
---
 .../test.d/dynevent/add_remove_fprobe_repeat.tc    |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe_repeat.tc

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe_repeat.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe_repeat.tc
new file mode 100644
index 000000000000..b4ad09237e2a
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_fprobe_repeat.tc
@@ -0,0 +1,19 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Generic dynamic event - Repeating 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
+REPEAT_TIMES=64
+
+for i in `seq 1 $REPEAT_TIMES`; do
+  echo "f:myevent $PLACE" >> dynamic_events
+  grep -q myevent dynamic_events
+  test -d events/fprobes/myevent
+  echo > dynamic_events
+done
+
+clear_trace