linux-kernel - [PATCH v3 4/5] perf mem: Fill in the missing freeing a session after an error occur

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Message-Id: <1435751988-9886-1-git-send-email-treeze.taeung@gmail.com>
Date:	Wed,  1 Jul 2015 20:59:48 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	linux-kernel@...r.kernel.org, jolsa@...hat.com,
	namhyung@...nel.org, Ingo Molnar <mingo@...hat.com>,
	Taeung Song <treeze.taeung@...il.com>
Subject: [PATCH v3 4/5] perf mem: Fill in the missing freeing a session after an error occur

When an error occur a error value is just returned
without freeing the session. So allocating and freeing
session have to be matched as a pair even if an error occur.

Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
 commit_msg               |  5 +++++
 tools/perf/builtin-mem.c | 16 ++++++----------
 2 files changed, 11 insertions(+), 10 deletions(-)
 create mode 100644 commit_msg

diff --git a/commit_msg b/commit_msg
new file mode 100644
index 0000000..659c93f
--- /dev/null
+++ b/commit_msg
@@ -0,0 +1,5 @@
+perf kmem: Fill in the missing freeing a session after an error occur
+
+When an error occur a error value is just returned
+without freeing the session. So allocating and freeing
+session have to be matched as a pair even if an error occur.
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index da2ec06..80170aa 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -124,7 +124,6 @@ static int report_raw_events(struct perf_mem *mem)
 		.mode = PERF_DATA_MODE_READ,
 		.force = mem->force,
 	};
-	int err = -EINVAL;
 	int ret;
 	struct perf_session *session = perf_session__new(&file, false,
 							 &mem->tool);
@@ -135,24 +134,21 @@ static int report_raw_events(struct perf_mem *mem)
 	if (mem->cpu_list) {
 		ret = perf_session__cpu_bitmap(session, mem->cpu_list,
 					       mem->cpu_bitmap);
-		if (ret)
+		if (ret < 0)
 			goto out_delete;
 	}
 
-	if (symbol__init(&session->header.env) < 0)
-		return -1;
+	ret = symbol__init(&session->header.env);
+	if (ret < 0)
+		goto out_delete;
 
 	printf("# PID, TID, IP, ADDR, LOCAL WEIGHT, DSRC, SYMBOL\n");
 
-	err = perf_session__process_events(session);
-	if (err)
-		return err;
-
-	return 0;
+	ret = perf_session__process_events(session);
 
 out_delete:
 	perf_session__delete(session);
-	return err;
+	return ret;
 }
 
 static int report_events(int argc, const char **argv, struct perf_mem *mem)
-- 
1.9.1

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