1 files changed, 37 insertions, 0 deletions
diff --git a/malloc/reallocarray.c b/malloc/reallocarray.c
new file mode 100644
index 0000000000..07562c30c9
--- /dev/null
+++ b/malloc/reallocarray.c
@@ -0,0 +1,37 @@
+/* Change the size of an allocated block.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <malloc.h>
+#include <malloc/malloc-internal.h>
+
+void *
+__libc_reallocarray (void *optr, size_t nmemb, size_t elem_size)
+{
+  size_t bytes;
+  if (check_mul_overflow_size_t (nmemb, elem_size, &bytes))
+    {
+      __set_errno (ENOMEM);
+      return 0;
+    }
+  else
+    return realloc (optr, bytes);
+}
+libc_hidden_def (__libc_reallocarray)
+
+weak_alias (__libc_reallocarray, reallocarray)