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From:   Francis Laniel <flaniel@linux.microsoft.com>
To:     linux-trace-kernel@vger.kernel.org
Cc:     Masami Hiramatsu <mhiramat@kernel.org>, stable@vger.kernel.org,
        Francis Laniel <flaniel@linux.microsoft.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Shuah Khan <shuah@kernel.org>, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org
Subject: [PATCH v5 2/2] selftests/ftrace: Add new test case which checks non unique symbol
Date:   Wed, 18 Oct 2023 17:40:30 +0300
Message-Id: <20231018144030.86885-3-flaniel@linux.microsoft.com>
In-Reply-To: <20231018144030.86885-1-flaniel@linux.microsoft.com>
References: <20231018144030.86885-1-flaniel@linux.microsoft.com>
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If name_show() is non unique, this test will try to install a kprobe on this
function which should fail returning EADDRNOTAVAIL.
On kernel where name_show() is not unique, this test is skipped.

Signed-off-by: Francis Laniel <flaniel@linux.microsoft.com>
---
 .../ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc  | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc

diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc
new file mode 100644
index 000000000000..bc9514428dba
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc
@@ -0,0 +1,13 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Test failure of registering kprobe on non unique symbol
+# requires: kprobe_events
+
+SYMBOL='name_show'
+
+# We skip this test on kernel where SYMBOL is unique or does not exist.
+if [ "$(grep -c -E "[[:alnum:]]+ t ${SYMBOL}" /proc/kallsyms)" -le '1' ]; then
+	exit_unsupported
+fi
+
+! echo "p:test_non_unique ${SYMBOL}" > kprobe_events
--
2.34.1