linux-kernel - [tip:perf/urgent] perf tools: Correct size computation in tracepoint_id_to

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Date:	Sun, 6 Dec 2009 09:24:44 GMT
From:	tip-bot for Julia Lawall <julia@...u.dk>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, acme@...hat.com, paulus@...ba.org,
	julia@...u.dk, hpa@...or.com, mingo@...hat.com,
	a.p.zijlstra@...llo.nl, efault@....de, fweisbec@...il.com,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/urgent] perf tools: Correct size computation in tracepoint_id_to_path()

Commit-ID:  59b4caeb797494043f5f3b98a610f5d9b75eefa3
Gitweb:     http://git.kernel.org/tip/59b4caeb797494043f5f3b98a610f5d9b75eefa3
Author:     Julia Lawall <julia@...u.dk>
AuthorDate: Sun, 6 Dec 2009 10:16:30 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Sun, 6 Dec 2009 10:21:59 +0100

perf tools: Correct size computation in tracepoint_id_to_path()

The size argument to zalloc should be the size of desired
structure, not the pointer to it.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@expression@
expression *x;
@@

x =
 <+...
-sizeof(x)
+sizeof(*x)
...+>// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
LKML-Reference: <Pine.LNX.4.64.0912061016120.20858@....diku.dk>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 tools/perf/util/parse-events.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 9e5dbd6..448a13b 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -197,7 +197,7 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config)
 			if (id == config) {
 				closedir(evt_dir);
 				closedir(sys_dir);
-				path = zalloc(sizeof(path));
+				path = zalloc(sizeof(*path));
 				path->system = malloc(MAX_EVENT_LENGTH);
 				if (!path->system) {
 					free(path);
--
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