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Message-ID: <20150224225458.GB3042@home.goodmis.org>
Date: Tue, 24 Feb 2015 17:54:58 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Jiri Olsa <jolsa@...nel.org>
Cc: linux-kernel@...r.kernel.org, Wang Nan <wangnan0@...wei.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Namhyung Kim <namhyung@...il.com>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
Tom Zanussi <tzanussi@...il.com>
Subject: Re: [PATCH 09/11] tools lib traceevent: Add alias field to struct
format_field
On Fri, Feb 20, 2015 at 11:17:06PM +0100, Jiri Olsa wrote:
> ---
> tools/lib/traceevent/event-parse.c | 1 +
> tools/lib/traceevent/event-parse.h | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
> index afe20ed9fac8..b35664cc1edc 100644
> --- a/tools/lib/traceevent/event-parse.c
> +++ b/tools/lib/traceevent/event-parse.c
> @@ -6236,6 +6236,7 @@ static void free_format_fields(struct format_field *field)
> next = field->next;
> free(field->type);
> free(field->name);
> + free(field->alias);
Hmm, didn't we say that if there's no need for the alias that the alias will
simply be a pointer to name? If that's the case we need:
if (field->alias != field->name)
free(field->alias);
free(field->name);
Otherwise it will be a double free.
-- Steve
> free(field);
> field = next;
> }
> diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
> index 5b4efc062320..8490a4afffa2 100644
> --- a/tools/lib/traceevent/event-parse.h
> +++ b/tools/lib/traceevent/event-parse.h
> @@ -187,6 +187,7 @@ struct format_field {
> struct event_format *event;
> char *type;
> char *name;
> + char *alias;
> int offset;
> int size;
--
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