* [PATCH v4 2/2] selftests/ftrace: Add new test case which checks non unique symbol
[not found] <20230825140519.34297-1-flaniel@linux.microsoft.com>
@ 2023-08-25 14:05 ` Francis Laniel
0 siblings, 0 replies; only message in thread
From: Francis Laniel @ 2023-08-25 14:05 UTC (permalink / raw)
To: linux-kernel
Cc: Masami Hiramatsu, linux-trace-kernel, Francis Laniel,
Steven Rostedt, Shuah Khan, linux-kselftest
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
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