linux-kernel - Re: [PATCH] selftests/kprobe: Update test for no event name syntax error

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Message-ID: <1c530e9b-3184-0113-d8ef-47548d7ab173@quicinc.com>
Date:   Mon, 18 Jul 2022 17:36:43 +0800
From:   Linyu Yuan <quic_linyyuan@...cinc.com>
To:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>
CC:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] selftests/kprobe: Update test for no event name syntax
 error

hi Masami,

On 7/18/2022 3:05 PM, Masami Hiramatsu (Google) wrote:
> From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
>
> The commit 208003254c32 ("selftests/kprobe: Do not test for GRP/
> without event failures") removed a syntax which is no more cause
> a syntax error (NO_EVENT_NAME error with GRP/).
> However, there are another case (NO_EVENT_NAME error without GRP/)
> which causes a same error. This adds a test for that case.
>
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> ---
>   .../ftrace/test.d/kprobe/kprobe_syntax_errors.tc   |    1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
> index 7c02509c71d0..9e85d3019ff0 100644
> --- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
> +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
> @@ -21,6 +21,7 @@ check_error 'p:^/bar vfs_read'		# NO_GROUP_NAME
>   check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read'	# GROUP_TOO_LONG
>   
>   check_error 'p:^foo.1/bar vfs_read'	# BAD_GROUP_NAME
> +check_error 'p:^ vfs_read'		# NO_EVENT_NAME

i think you fix the issue which exist from start, right ?

is there better comment than NO_EVENT_NAME  ?

>   check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read'	# EVENT_TOO_LONG
>   check_error 'p:foo/^bar.1 vfs_read'	# BAD_EVENT_NAME
>   
>