linux-kernel - Re: [PATCH perf/core 2/2] perf-probe: Check the orphaned -x option

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Date:	Wed, 1 Apr 2015 13:11:04 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>, namhyung@...nel.org,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH perf/core  2/2] perf-probe: Check the orphaned -x option

On Wed, Apr 01, 2015 at 07:25:42PM +0900, Masami Hiramatsu wrote:
> To avoid probing in unintended binary, the orphaned -x option
> must be checked and warned.
> 
> Without this patch, following command sets up the probe in
> the kernel.
>   -----
>   # perf probe -a strcpy -x ./perf
>   Added new event:
>     probe:strcpy         (on strcpy)
> 
>   You can now use it in all perf tools, such as:
> 
>           perf record -e probe:strcpy -aR sleep 1
>   -----
> 
> But in this case, it seems that the user may want to probe
> in the perf binary. With this patch, perf-probe correctly
> handles the orphaned -x.
>   -----
>   # perf probe -a strcpy -x ./perf
>     Error: -x/-m must follow the probe definitions.
>   ...
>   -----
> 
> Reported-by: Jiri Olsa <jolsa@...hat.com>

works nicely, thanks a lot!

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

jirka
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