linux-kernel - [tip:perf/core] perf ui/gtk: Fix segmentation fault on perf_hpp__for_each

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Date:	Mon, 12 Aug 2013 03:23:42 -0700
From:	tip-bot for Namhyung Kim <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, paulus@...ba.org,
	hpa@...or.com, mingo@...nel.org, andi@...stfloor.org,
	a.p.zijlstra@...llo.nl, penberg@...nel.org, namhyung.kim@....com,
	namhyung@...nel.org, jolsa@...hat.com, hch@...radead.org,
	tglx@...utronix.de
Subject: [tip:perf/core] perf ui/gtk:
  Fix segmentation fault on perf_hpp__for_each_format loop

Commit-ID:  d50bf78ff69297d3f60aa778c272acc8e5f59a19
Gitweb:     http://git.kernel.org/tip/d50bf78ff69297d3f60aa778c272acc8e5f59a19
Author:     Namhyung Kim <namhyung.kim@....com>
AuthorDate: Tue, 6 Aug 2013 14:14:13 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 7 Aug 2013 17:35:39 -0300

perf ui/gtk: Fix segmentation fault on perf_hpp__for_each_format loop

The commit 2b8bfa6bb8a7 ("perf tools: Centralize default columns init in
perf_hpp__init") moves initialization of common overhead column to
perf_hpp__init() but forgot about the gtk code.

So the gtk code added the same column to the list twice causing infinite
loop when iterating it by perf_hpp__for_each_format loop.  When I run
perf report --gtk, I can see following messages indefinitely.

  (perf:11687): Gtk-CRITICAL **: IA__gtk_main_quit: assertion 'main_loops != NULL' failed
  perf: Segmentation fault

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Reviewed-by: Pekka Enberg <penberg@...nel.org>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1375766056-19377-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/ui/gtk/hists.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index cb2ed198..2ca66cc 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -109,8 +109,6 @@ __HPP_COLOR_PERCENT_FN(overhead_guest_us, period_guest_us)
 
 void perf_gtk__init_hpp(void)
 {
-	perf_hpp__column_enable(PERF_HPP__OVERHEAD);
-
 	perf_hpp__init();
 
 	perf_hpp__format[PERF_HPP__OVERHEAD].color =
--
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