[tip:perf/core] perf tools: Fix memory leak when synthesizing thread records

[tip-bot for Namhyung Kim <tipbot@zytor.com>]

Commit-ID:  574799bfdbc3a13e0b5e2f6af34b761bde743a9a
Gitweb:     http://git.kernel.org/tip/574799bfdbc3a13e0b5e2f6af34b761bde743a9a
Author:     Namhyung Kim <namhyung@kernel.org>
AuthorDate: Mon, 17 Mar 2014 10:45:49 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 18 Mar 2014 18:17:01 -0300

perf tools: Fix memory leak when synthesizing thread records

Checking default guest machine should be done before allocating event
structures otherwise it'll leak memory.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Link: http://lkml.kernel.org/r/87ob15tx6a.fsf@sejong.aot.lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/event.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index ebb48a6..9d12aa6 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -446,6 +446,9 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
 	union perf_event *comm_event, *mmap_event, *fork_event;
 	int err = -1;
 
+	if (machine__is_default_guest(machine))
+		return 0;
+
 	comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 	if (comm_event == NULL)
 		goto out;
@@ -458,9 +461,6 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
 	if (fork_event == NULL)
 		goto out_free_mmap;
 
-	if (machine__is_default_guest(machine))
-		return 0;
-
 	snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 	proc = opendir(proc_path);