--- /dev/null
+++ libmalloc/libmalloc-657.60.21/tests/reallocarray.c
@@ -0,0 +1,31 @@
+#include <stdlib.h>
+
+#include <malloc_private.h>
+
+#include <darwintest.h>
+
+T_DECL(reallocarray, "reallocarray(3)",
+	   T_META_TAG_VM_PREFERRED,
+	   T_META_RUN_CONCURRENTLY(true),
+	   T_META_CHECK_LEAKS(NO)){
+	void *ptr;
+	T_WITH_ERRNO; T_EXPECT_NOTNULL((ptr = reallocarray(NULL, 8, 8)), NULL);
+	T_WITH_ERRNO; T_EXPECT_NOTNULL(reallocarray(ptr, 8, 8), NULL);
+	T_EXPECT_NULL(reallocarray(NULL, SIZE_MAX >> 3, 1 << 5), NULL);
+	T_EXPECT_EQ(errno, ENOMEM, NULL);
+	T_EXPECT_NULL(reallocarray(ptr, SIZE_MAX >> 3, 1 << 5), NULL);
+	T_EXPECT_EQ(errno, ENOMEM, NULL);
+}
+
+T_DECL(reallocarrayf, "reallocarrayf(3)",
+	   T_META_TAG_VM_PREFERRED,
+	   T_META_RUN_CONCURRENTLY(true),
+	   T_META_CHECK_LEAKS(NO)){
+	void *ptr;
+	T_WITH_ERRNO; T_EXPECT_NOTNULL((ptr = reallocarrayf(NULL, 8, 8)), NULL);
+	T_WITH_ERRNO; T_EXPECT_NOTNULL(reallocarrayf(ptr, 8, 8), NULL);
+	T_EXPECT_NULL(reallocarrayf(NULL, SIZE_MAX >> 3, 1 << 5), NULL);
+	T_EXPECT_EQ(errno, ENOMEM, NULL);
+	T_EXPECT_NULL(reallocarrayf(ptr, SIZE_MAX >> 3, 1 << 5), NULL);
+	T_EXPECT_EQ(errno, ENOMEM, NULL);
+}