linux-kernel - [tip:perf/core] perf evsel: Do not call pevent_free

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Date:	Thu, 6 Nov 2014 21:32:29 -0800
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	jolsa@...nel.org, acme@...hat.com, hpa@...or.com,
	tglx@...utronix.de, fweisbec@...il.com, a.p.zijlstra@...llo.nl,
	dsahern@...il.com, linux-kernel@...r.kernel.org,
	rostedt@...dmis.org, cjashfor@...ux.vnet.ibm.com, mingo@...nel.org,
	namhyung@...nel.org, paulus@...ba.org
Subject: [tip:perf/core] perf evsel:
  Do not call pevent_free_format when deleting tracepoint

Commit-ID:  daa01794a4a36a1da1b09a529adec0c8c0b94ab2
Gitweb:     http://git.kernel.org/tip/daa01794a4a36a1da1b09a529adec0c8c0b94ab2
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Tue, 4 Nov 2014 11:55:38 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 6 Nov 2014 17:47:14 -0300

perf evsel: Do not call pevent_free_format when deleting tracepoint

The libtraceevent library's main handle 'struct pevent' holds pointers
of every event that was added to it via functions:

  pevent_parse_format
  pevent_parse_event

We can't release struct event_format (call pevent_free_format)
separately, because that breaks that pointers array mentioned above and
another add_event call could end up with segfault.

All added events are released within the handle cleanup in pevent_free.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/r/1415098538-1512-1-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/evsel.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 2f9e680..12b4396 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -853,8 +853,6 @@ void perf_evsel__exit(struct perf_evsel *evsel)
 	perf_evsel__free_id(evsel);
 	close_cgroup(evsel->cgrp);
 	zfree(&evsel->group_name);
-	if (evsel->tp_format)
-		pevent_free_format(evsel->tp_format);
 	zfree(&evsel->name);
 	perf_evsel__object.fini(evsel);
 }
--
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