linux-kernel - Re: [PATCH 06/14] tools lib traceevent: Get rid of malloc_or_die() in find

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Message-ID: <20131209110350.GH1242@krava.brq.redhat.com>
Date:	Mon, 9 Dec 2013 12:03:50 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 06/14] tools lib traceevent: Get rid of malloc_or_die()
 in find_event()

On Mon, Dec 09, 2013 at 02:34:03PM +0900, Namhyung Kim wrote:
> Make it return -2 to distinguish malloc allocation failure.
> 
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/lib/traceevent/parse-filter.c | 17 ++++++++++++++---
>  1 file changed, 14 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
> index e9d17bfcdffd..06e5af9f8fc4 100644
> --- a/tools/lib/traceevent/parse-filter.c
> +++ b/tools/lib/traceevent/parse-filter.c
> @@ -301,7 +301,10 @@ find_event(struct pevent *pevent, struct event_list **events,
>  		sys_name = NULL;
>  	}
>  
> -	reg = malloc_or_die(strlen(event_name) + 3);
> +	reg = malloc(strlen(event_name) + 3);
> +	if (reg == NULL)
> +		return -2;
> +

I guess we dont need error defines or enums when this is just
static function, but at least please add some comment (description)
of return values like in pevent_filter_match function

jirka
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