From: mhiramat@kernel.org (Masami Hiramatsu)
Date: Thu, 22 Feb 2018 00:01:58 +0900
Subject: [PATCH v2 16/17] selftests: ftrace: Add a testcase for $argN with
 kprobe_event
In-Reply-To: <151922484560.6217.1143686155616343906.stgit@devbox>
References: <151922484560.6217.1143686155616343906.stgit@devbox>
Message-ID: <151922531797.6217.2490233092090771101.stgit@devbox>
Content-Type: text/plain; charset="UTF-8"
Message-ID: <20180221150158.JRnrFagq5DL3EhbR_2JUJU1fiHwMJhvOXHWaLAb1X5I@z>

Add a testcase for array type with kprobe event.
This tests whether the traced data is correct or not.
If the kernel doesn't support array type, it skips
the test as UNSUPPORTED.

Signed-off-by: Masami Hiramatsu <mhiramat at kernel.org>
---
 .../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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