linux-kernel - [PATCH 2/3] selftests/ftrace: Fix eprobe syntax test case to check filter support

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Date:   Sat,  7 Jan 2023 22:32:27 +0900
From:   "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
To:     Shuah Khan <shuah@...nel.org>, Steven Rostedt <rostedt@...dmis.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: [PATCH 2/3] selftests/ftrace: Fix eprobe syntax test case to check filter support

From: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Fix eprobe syntax test case to check whether the kernel supports the filter
on eprobe for filter syntax test command. Without this fix, this test case
will fail if the kernel supports eprobe but doesn't support the filter on
eprobe.

Fixes: 9e14bae7d049 ("selftests/ftrace: Add eprobe syntax error testcase")
Cc: stable@...r.kernel.org
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
---
 .../test.d/dynevent/eprobes_syntax_errors.tc       |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/eprobes_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/eprobes_syntax_errors.tc
index fc1daac7f066..4f5e8c665156 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/eprobes_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/eprobes_syntax_errors.tc
@@ -22,6 +22,8 @@ check_error 'e:foo/^bar.1 syscalls/sys_enter_openat'	# BAD_EVENT_NAME
 check_error 'e:foo/bar syscalls/sys_enter_openat arg=^dfd'	# BAD_FETCH_ARG
 check_error 'e:foo/bar syscalls/sys_enter_openat ^arg=$foo'	# BAD_ATTACH_ARG
 
-check_error 'e:foo/bar syscalls/sys_enter_openat if ^'	# NO_EP_FILTER
+if grep -q '<attached-group>\.<attached-event>.*\[if <filter>\]' README; then
+  check_error 'e:foo/bar syscalls/sys_enter_openat if ^'	# NO_EP_FILTER
+fi
 
 exit 0