From c213b29d14aaf2f4523d638abc762eaaa873cf83 Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <alan.coopersmith@oracle.com>
Date: Sat, 21 Mar 2015 08:58:04 -0700
Subject: [PATCH] Add xallocarray() helper macro

Uses reallocarray to perform integer overflow detection when allocating
an array, using NULL as the previous pointer to force a new allocation.

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
---
 include/os.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/os.h b/include/os.h
index ffa5f3923..263374185 100644
--- a/include/os.h
+++ b/include/os.h
@@ -74,6 +74,8 @@ typedef struct _NewClientRec *NewClientPtr;
 
 #define xstrdup(s) Xstrdup(s)
 #define xnfstrdup(s) XNFstrdup(s)
+
+#define xallocarray(num, size) reallocarray(NULL, (num), (size))
 #endif
 
 #include <stdio.h>