linux-kernel - Re: [PATCH] perf annotate: Don't prepend symfs path to build_id

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Date:   Fri, 9 Mar 2018 16:07:15 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Martin Vuille <jpmv27@....com>
Cc:     Arnaldo Carvalho de Melo <acme@...hat.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf annotate: Don't prepend symfs path to
 build_id_filename

Em Sun, Feb 11, 2018 at 02:19:37PM -0500, Martin Vuille escreveu:
> build_id_filename already contains symfs path if applicable, so
> don't prepend it a second time.

Where is the analysis that shows that that is the case? I looked here at
the implementation for dso__build_id_filename() and couldn't find where
was it that the symfs would be appended, can you clarify?

- Arnaldo
 
> Signed-off-by: Martin Vuille <jpmv27@....com>
> ---
>  tools/perf/util/annotate.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 28b233c3dcbe..425b7f0760ec 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -1381,7 +1381,7 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil
>  
>  	build_id_filename = dso__build_id_filename(dso, NULL, 0, false);
>  	if (build_id_filename) {
> -		__symbol__join_symfs(filename, filename_size, build_id_filename);
> +		scnprintf(filename, filename_size, "%s", build_id_filename);
>  		free(build_id_filename);
>  	} else {
>  		if (dso->has_build_id)
> -- 
> 2.13.6