linux-kernel - Re: [PATCH] perf, tools: Handle events including .c and .o

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Date:   Sun, 18 Sep 2016 11:03:27 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>, wangnan0@...wei.com,
        sukadev@...ux.vnet.ibm.com
Subject: Re: [PATCH] perf, tools: Handle events including .c and .o

On Sat, Sep 17, 2016 at 06:02:46PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> This is a generic bug fix, but it helps with Sukadev's JSON event tree
> where such events can happen.
> 
> Any event inclduing a .c/.o/.bpf currently triggers BPF compilation or loading
> and then an error.  This can happen for some Intel JSON events, which cannot
> be used.
> 
> Fix the scanner to only match for .o or .c or .bpf at the end.
> This will prevent loading multiple BPF scripts separated with comma,
> but I assume this is acceptable.
> 
> Cc: wangnan0@...wei.com
> Cc: sukadev@...ux.vnet.ibm.com
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  tools/perf/util/parse-events.l | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
> index 7a2519435da0..64ca26e4ed2d 100644
> --- a/tools/perf/util/parse-events.l
> +++ b/tools/perf/util/parse-events.l
> @@ -162,8 +162,8 @@ modifier_bp	[rwx]{1,3}
>  		}
>  
>  {event_pmu}	|
> -{bpf_object}	|
> -{bpf_source}	|
> +({bpf_object}$)	|
> +({bpf_source}$)	|

why are the () braces necessary? anyway:

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka

>  {event}		{
>  			BEGIN(INITIAL);
>  			REWIND(1);
> -- 
> 2.5.5
>