util: add an ARRAY_SIZE helper.
Bug: None
Test: `make tests` pass
Change-Id: Iecd2015b7ff96cdd78ff61c905ad065e272c2885
diff --git a/test/libminijail_test.cpp b/test/libminijail_test.cpp
index 6499a37..e457c24 100644
--- a/test/libminijail_test.cpp
+++ b/test/libminijail_test.cpp
@@ -19,6 +19,7 @@
#include <libminijail.h>
#include <android-base/logging.h>
+#include <android-base/macros.h>
const uid_t kSystemUid = 1000U;
@@ -114,7 +115,7 @@
minijail* j = minijail_new();
minijail_change_user(j, "system");
minijail_change_group(j, "system");
- size_t num_groups = sizeof(groups) / sizeof(groups[0]);
+ size_t num_groups = arraysize(groups);
minijail_set_supplementary_gids(j, num_groups, groups);
minijail_use_caps(j, CAP_TO_MASK(CAP_SETUID) | CAP_TO_MASK(CAP_SETGID));
minijail_enter(j);