linux-kernel - [PATCH v6 7/8] selftests/ftrace: add kprobe test cases for VFS type "%pd" and "%pD"

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Date: Fri, 15 Mar 2024 14:55:39 +0800
From: Ye Bin <yebin10@...wei.com>
To: <rostedt@...dmis.org>, <mhiramat@...nel.org>,
	<mathieu.desnoyers@...icios.com>, <linux-trace-kernel@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, <yebin10@...wei.com>
Subject: [PATCH v6 7/8] selftests/ftrace: add kprobe test cases for VFS type "%pd" and "%pD"

This patch adds test cases for new print format type "%pd/%pD".The test cases
test the following items:
1. Test README if add "%pd/%pD" type;
2. Test "%pd" type for dput();
3. Test "%pD" type for vfs_read();

This test case require enable CONFIG_HAVE_FUNCTION_ARG_ACCESS_API configuration.

Signed-off-by: Ye Bin <yebin10@...wei.com>
---
 .../ftrace/test.d/kprobe/kprobe_args_vfs.tc   | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_vfs.tc

diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_vfs.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_vfs.tc
new file mode 100644
index 000000000000..8bea9a75a331
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_vfs.tc
@@ -0,0 +1,43 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Kprobe event VFS type argument
+# requires: kprobe_events "%pd/%pD":README
+
+: "Test argument %pd/%pD in README"
+grep -q "%pd/%pD" README
+
+: "Test argument %pd with name"
+echo 'p:testprobe dput name=$arg1:%pd' > kprobe_events
+echo 1 > events/kprobes/testprobe/enable
+grep -q "1" events/kprobes/testprobe/enable
+echo 0 > events/kprobes/testprobe/enable
+grep "dput" trace | grep -q "enable"
+echo "" > kprobe_events
+echo "" > trace
+
+: "Test argument %pd without name"
+echo 'p:testprobe dput $arg1:%pd' > kprobe_events
+echo 1 > events/kprobes/testprobe/enable
+grep -q "1" events/kprobes/testprobe/enable
+echo 0 > events/kprobes/testprobe/enable
+grep "dput" trace | grep -q "enable"
+echo "" > kprobe_events
+echo "" > trace
+
+: "Test argument %pD with name"
+echo 'p:testprobe vfs_read name=$arg1:%pD' > kprobe_events
+echo 1 > events/kprobes/testprobe/enable
+grep -q "1" events/kprobes/testprobe/enable
+echo 0 > events/kprobes/testprobe/enable
+grep "vfs_read" trace | grep -q "enable"
+echo "" > kprobe_events
+echo "" > trace
+
+: "Test argument %pD without name"
+echo 'p:testprobe vfs_read $arg1:%pD' > kprobe_events
+echo 1 > events/kprobes/testprobe/enable
+grep -q "1"  events/kprobes/testprobe/enable
+echo 0 > events/kprobes/testprobe/enable
+grep "vfs_read" trace | grep -q "enable"
+echo "" > kprobe_events
+echo "" > trace
-- 
2.31.1