linux-kernel - [PATCH] selftests/ftrace: check for do_sys

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Message-Id: <20201001085641.51130-1-colin.king@canonical.com>
Date:   Thu,  1 Oct 2020 09:56:41 +0100
From:   Colin King <colin.king@...onical.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>, Shuah Khan <shuah@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Tom Zanussi <zanussi@...nel.org>,
        linux-kselftest@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] selftests/ftrace: check for do_sys_openat2 in user-memory test

From: Colin Ian King <colin.king@...onical.com>

More recent libc implementations are now using openat/openat2 system
calls so also add do_sys_openat2 to the tracing so that the test
passes on these systems because do_sys_open may not be called.

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 .../testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc  | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc
index a30a9c07290d..cf1b4c3e9e6b 100644
--- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc
@@ -9,6 +9,8 @@ grep -A10 "fetcharg:" README | grep -q '\[u\]<offset>' || exit_unsupported
 :;: "user-memory access syntax and ustring working on user memory";:
 echo 'p:myevent do_sys_open path=+0($arg2):ustring path2=+u0($arg2):string' \
 	> kprobe_events
+echo 'p:myevent2 do_sys_openat2 path=+0($arg2):ustring path2=+u0($arg2):string' \
+	> kprobe_events
 
 grep myevent kprobe_events | \
 	grep -q 'path=+0($arg2):ustring path2=+u0($arg2):string'
-- 
2.27.0