[tip:perf/core] perf tests: Do not use sizeof on pointer type

From: tip-bot for Vaishali Thakkar
Date: Sun May 01 2016 - 03:42:34 EST

Commit-ID: ca7ce82a280a65c377c24c95c29b1dec6e80b428
Gitweb: http://git.kernel.org/tip/ca7ce82a280a65c377c24c95c29b1dec6e80b428
Author: Vaishali Thakkar <vaishali.thakkar@xxxxxxxxxx>
AuthorDate: Thu, 28 Apr 2016 22:16:57 +0530
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 28 Apr 2016 15:37:52 -0300

perf tests: Do not use sizeof on pointer type

Using sizeof on a malloced pointer type will return the wordsize which
can often cause one to allocate a buffer much smaller than it is needed.
So, here do not use sizeof on pointer type.

Note that this has no effect on runtime because 'dsos' is a pointer to a

Problem found using Coccinelle.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1461862017-23358-1-git-send-email-vaishali.thakkar@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
tools/perf/tests/dso-data.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/dso-data.c b/tools/perf/tests/dso-data.c
index dc673ff..8cf0d9e 100644
--- a/tools/perf/tests/dso-data.c
+++ b/tools/perf/tests/dso-data.c
@@ -202,7 +202,7 @@ static int dsos__create(int cnt, int size)
int i;

- dsos = malloc(sizeof(dsos) * cnt);
+ dsos = malloc(sizeof(*dsos) * cnt);
TEST_ASSERT_VAL("failed to alloc dsos array", dsos);

for (i = 0; i < cnt; i++) {