netdev - Re: [PATCH v4 perf,bpf 12/15] perf, bpf: enable annotation of bpf program

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Date:   Wed, 27 Feb 2019 14:21:47 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Song Liu <songliubraving@...com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        ast@...nel.org, daniel@...earbox.net, kernel-team@...com,
        peterz@...radead.org, acme@...hat.com, jolsa@...nel.org,
        namhyung@...nel.org
Subject: Re: [PATCH v4 perf,bpf 12/15] perf, bpf: enable annotation of bpf
 program

On Mon, Feb 25, 2019 at 04:20:16PM -0800, Song Liu wrote:

SNIP

> diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
> index 093352e93d50..0bc9ec69f38a 100644
> --- a/tools/perf/util/util.c
> +++ b/tools/perf/util/util.c
> @@ -506,3 +506,13 @@ const char *perf_tip(const char *dirpath)
>  
>  	return tip;
>  }
> +
> +void get_exec_path(char *tpath, size_t size)
> +{
> +	const char *path = "/proc/self/exe";
> +	ssize_t len;
> +
> +	len = readlink(path, tpath, size - 1);
> +	assert(len > 0);
> +	tpath[len] = 0;
> +}

we have now helper for that, please rebase this on top of
arnaldo's perf/core:

  94816add0005 perf tools: Add perf_exe() helper to find perf binary

jirka