linux-kernel - Re: [PATCH] perf report: Provide libtraceevent with a kernel symbol resolver

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Message-ID: <20180115100611.GB14646@krava>
Date:   Mon, 15 Jan 2018 11:06:11 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Wang YanQing <udknight@...il.com>, acme@...nel.org,
        peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf report: Provide libtraceevent with a kernel symbol
 resolver

On Mon, Jan 15, 2018 at 12:47:32PM +0800, Wang YanQing wrote:
> So that beautifiers wanting to resolve kernel function addresses to
> names can do its work, and when we use "perf report" for output of
> "perf kmem record", we will get kernel symbol output.
> 
> Signed-off-by: Wang YanQing <udknight@...il.com>
> ---
>  tools/perf/builtin-report.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index dd4df9a..7b65100 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -1317,6 +1317,15 @@ int cmd_report(int argc, const char **argv)
>  		report.range_num = 1;
>  	}
>  
> +	if (session->tevent.pevent &&
> +	    pevent_set_function_resolver(session->tevent.pevent,
> +					 machine__resolve_kernel_addr,
> +					 &session->machines.host) < 0) {
> +		pr_err("%s: failed to set libtraceevent function resolver\n",
> +		       __func__);
> +		return -1;
> +	}

why not calling the wrapper trace_event__register_resolver?

jirka

> +
>  	sort__setup_elide(stdout);
>  
>  	ret = __cmd_report(&report);
> -- 
> 1.8.5.6.2.g3d8a54e.dirty
>