Re: [PATCH -tip v2 1/2] [CLEANUP] perf-probe: Expand given path to absolute path

[Arnaldo Carvalho de Melo <acme@ghostprotocols.net>]

Em Thu, Dec 26, 2013 at 09:14:46AM -0500, David Ahern escreveu:
> On 12/26/13, 12:41 AM, Masami Hiramatsu wrote:
> >@@ -180,7 +181,20 @@ static int opt_set_target(const struct option *opt, const char *str,
> >  		else
> >  			return ret;
> >
> >-		params.target = str;
> >+		/* Expand given path to absolute path, except for modulename */
> >+		if (params.uprobes || strchr(str, '/')) {
> >+			tmp = realpath(str, NULL);
> >+			if (!tmp) {
> >+				pr_warning("Failed to find the path of %s.\n",
> >+					   str);
> 
> That error message will be misleading if it is generated. How about:
>     Failed to get the absolute path of %s: %d\n", str, errno.

Changed it to:

 pr_warning("Failed to get the absolute path of %s: %m\n", str);

 
> >+				return ret;
> >+			}
> >+		} else {
> >+			tmp = strdup(str);
> >+			if (!tmp)
> >+				return -ENOMEM;
> >+		}
> >+		params.target = tmp;
> 
> When is params.target freed?

> David