linux-kernel - Re: [PATCH perf/core 5/8] perf probe: Allow to use filter on --del command

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Date:	Wed, 22 Apr 2015 22:56:57 +0900
From:	Namhyung Kim <namhyung@...nel.org>
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>, Jiri Olsa <jolsa@...hat.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH perf/core 5/8] perf probe: Allow to use filter on --del
 command

On Tue, Apr 21, 2015 at 08:42:06PM +0900, Masami Hiramatsu wrote:
> -int del_perf_probe_events(struct strlist *dellist)
> +int del_perf_probe_events(struct strfilter *filter)
>  {
> -	int ret = -1, ret2, ufd = -1, kfd = -1;
> -	char buf[128];
> -	const char *group, *event;
> -	char *p, *str;
> -	struct str_node *ent;
> +	int ret = 0, ufd = -1, kfd = -1;
>  	struct strlist *namelist = NULL, *unamelist = NULL;
> +	char *str = strfilter__string(filter);

You may want to check the return value here - or in the
strfilter__string() ?

Thanks,
Namhyung


> +
> +	pr_debug("Filter: \'%s\'\n", str);

[SNIP]
> +char *strfilter__string(struct strfilter *filter)
> +{
> +	int len;
> +	char *ret = NULL;
> +
> +	len = strfilter_node__sprint(filter->root, NULL);
> +	if (len < 0)
> +		return NULL;
> +
> +	ret = malloc(len + 1);

Here?

> +	strfilter_node__sprint(filter->root, ret);
> +
> +	return ret;
> +}
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