From mboxrd@z Thu Jan  1 00:00:00 1970
From: mhiramat@kernel.org (Masami Hiramatsu)
Date: Sat, 17 Mar 2018 21:50:54 +0900
Subject: [PATCH v6 18/21] selftests: ftrace: Add a testcase for $argN with
 kprobe_event
In-Reply-To: <152129024033.31874.15800253385376959274.stgit@devbox>
References: <152129024033.31874.15800253385376959274.stgit@devbox>
Message-ID: <152129105459.31874.15978479654038019110.stgit@devbox>
Content-Type: text/plain; charset="UTF-8"
Message-ID: <20180317125054.6uJgjLt55cw3-9_B1xZppiaQUT-pigLlXUS4_VQIkRU@z>

Add a testcase for $argN with kprobe event.
This tests whether the traced data is correct or not.
If the kernel doesn't support $argN (depends on arch),
it skips the test as UNSUPPORTED.

Signed-off-by: Masami Hiramatsu <mhiramat at kernel.org>
---
 Changes in v5:
  - Fix description.
---
 .../ftrace/test.d/kprobe/kprobe_args_argN.tc       |   25 ++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc

diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc
new file mode 100644
index 000000000000..d5c5c8c3a51e
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_argN.tc
@@ -0,0 +1,25 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Kprobe event argN argument
+
+[ -f kprobe_events ] || exit_unsupported # this is configurable
+
+grep -q "arg<N>" README || exit_unsupported # version issue
+
+echo 0 > events/enable
+echo > kprobe_events
+
+: "Test bad pattern : arg0 is not allowed"
+! echo 'p:testprobe create_trace_kprobe $arg0' > kprobe_events
+
+: "Test get argument"
+echo 'p:testprobe create_trace_kprobe $arg1' > kprobe_events
+echo 1 > events/kprobes/testprobe/enable
+! echo test >> kprobe_events
+tail -n 1 trace | grep -qe "testprobe.* arg1=0x1"
+
+! echo test test test >> kprobe_events
+tail -n 1 trace | grep -qe "testprobe.* arg1=0x3"
+
+echo 0 > events/enable
+echo > kprobe_events

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