linux-kernel - Re: [PROBLEM] perf report --gtk doesn't work

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Message-ID: <87ppk2p824.fsf@sejong.aot.lge.com>
Date:	Mon, 28 Apr 2014 10:16:35 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Pekka Enberg <penberg@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: Re: [PROBLEM] perf report --gtk doesn't work

Hi Pekka,

On Fri, 25 Apr 2014 14:09:45 +0300, Pekka Enberg wrote:
> Hello,
>
> I'm seeing the following with v3.15-rc2:
>
> $ ~/bin/perf report --gtk
> GTK browser requested but could not find libperf-gtk.so
>
> The library file is in $HOME/lib64 and perf attempts to look it up.
> However, printing out dlerror() output shows the following:
>
> [penberg@...alhost hornet]$ ~/bin/perf report --gtk
> /home/penberg/lib64/libperf-gtk.so: undefined symbol: sort_sym
> GTK browser requested but could not find libperf-gtk.so

Hmm.. strange.  On my system, it works perfectly..

>
> I'm not sure how this is supposed to work. sort_sym() is defined in
> the 'perf' executable so how is libperf-gtk.so going to see it?

I'm also not sure.. maybe linker finds the symbol in the executable in
case of dlopen()?

Thanks,
Namhyung
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