linux-kernel - Re: [PATCH V2 06/15] perf tools: fix parse_events_terms() freeing local variable on error path

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Date:	Fri, 28 Jun 2013 15:57:36 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Adrian Hunter <adrian.hunter@...el.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH V2 06/15] perf tools: fix parse_events_terms() freeing
 local variable on error path

On Fri, Jun 28, 2013 at 07:41:55AM -0600, David Ahern wrote:
> On 6/28/13 12:32 AM, Adrian Hunter wrote:
> 
> >>Seems like you can just fix parse_events__free_terms to do the right thing
> >>and not call free(terms) -- ie., no need for a separate "only" function.
> >> From there only test_term() needs to do the free(terms) and since it mallocs
> >>the memory there it is nicely symmetrical.
> >
> >There are 2 more calls to parse_events__free_terms in util/parse-events.y
> >
> 
> Right and both look like stack case uses. I don't see the need for
> __free_terms to free the list so no need for an _only version.

there's also another one in pmu_alias_terms function
which uses on stack list_head

jirka
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