linux-kernel - [tip:perf/core] perf stat: Fix cmd_stat to release cpu

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Message-ID: <tip-544c2ae7b1a794ad0bc5ec24d832ab5658d5aef6@git.kernel.org>
Date:	Thu, 10 Dec 2015 00:16:24 -0800
From:	tip-bot for Masami Hiramatsu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, mingo@...nel.org, jolsa@...hat.com,
	adrian.hunter@...el.com, acme@...hat.com, a.p.zijlstra@...llo.nl,
	namhyung@...nel.org, linux-kernel@...r.kernel.org,
	masami.hiramatsu.pt@...achi.com, tglx@...utronix.de
Subject: [tip:perf/core] perf stat: Fix cmd_stat to release cpu_map

Commit-ID:  544c2ae7b1a794ad0bc5ec24d832ab5658d5aef6
Gitweb:     http://git.kernel.org/tip/544c2ae7b1a794ad0bc5ec24d832ab5658d5aef6
Author:     Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
AuthorDate: Wed, 9 Dec 2015 11:11:27 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 9 Dec 2015 13:41:59 -0300

perf stat: Fix cmd_stat to release cpu_map

Fix cmd_stat() to release cpu_map objects (aggr_map and
cpus_aggr_map) afterwards.

refcnt debugger shows that the cmd_stat initializes cpu_map
but not puts it.
  ----
  # ./perf stat -v ls
  ....
  REFCNT: BUG: Unreclaimed objects found.
  ==== [0] ====
  Unreclaimed cpu_map@...9339c0
  Refcount +1 => 1 at
    ./perf(cpu_map__empty_new+0x6d) [0x4e64bd]
    ./perf(cmd_stat+0x5fe) [0x43594e]
    ./perf() [0x47b785]
    ./perf(main+0x617) [0x422587]
    /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f2dff420af5]
    ./perf() [0x4226fd]
  REFCNT: Total 1 objects are not reclaimed.
    "cpu_map" leaks 1 objects
  ----

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/20151209021127.10245.93697.stgit@localhost.localdomain
[ Remove NULL checks before calling the put operation, it checks it already ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-stat.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index e74712d..25a95f4 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1094,6 +1094,14 @@ static int perf_stat_init_aggr_mode(void)
 	return cpus_aggr_map ? 0 : -ENOMEM;
 }
 
+static void perf_stat__exit_aggr_mode(void)
+{
+	cpu_map__put(aggr_map);
+	cpu_map__put(cpus_aggr_map);
+	aggr_map = NULL;
+	cpus_aggr_map = NULL;
+}
+
 /*
  * Add default attributes, if there were no attributes specified or
  * if -d/--detailed, -d -d or -d -d -d is used:
@@ -1442,6 +1450,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (!forever && status != -1 && !interval)
 		print_counters(NULL, argc, argv);
 
+	perf_stat__exit_aggr_mode();
 	perf_evlist__free_stats(evsel_list);
 out:
 	perf_evlist__delete(evsel_list);
--
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