--- /dev/null
+++ libmalloc/libmalloc-715.140.5/src/legacy_malloc.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include "internal.h"
+
+/*
+ * For use by CheckFix: create a new zone whose behavior is, apart from
+ * the use of death-row and per-CPU magazines, that of Leopard.
+ */
+static MALLOC_NOINLINE void *
+legacy_valloc(szone_t *szone, size_t size)
+{
+	void *ptr;
+	size_t num_kernel_pages;
+
+	num_kernel_pages = round_large_page_quanta(size) >> large_vm_page_quanta_shift;
+	ptr = large_malloc(szone, num_kernel_pages, 0, TRUE);
+#if DEBUG_MALLOC
+	if (LOG(szone, ptr)) {
+		malloc_report(ASL_LEVEL_INFO, "legacy_valloc returned %p\n", ptr);
+	}
+#endif
+	return ptr;
+}
+
+malloc_zone_t *
+create_legacy_scalable_zone(size_t initial_size, unsigned debug_flags)
+{
+	malloc_zone_t *mzone = create_scalable_zone(initial_size, debug_flags);
+	szone_t *szone = (szone_t *)mzone;
+
+	if (!szone) {
+		return NULL;
+	}
+
+	mprotect(szone, sizeof(szone->basic_zone), PROT_READ | PROT_WRITE);
+	szone->basic_zone.valloc = (void *)legacy_valloc;
+	szone->basic_zone.free_definite_size = NULL;
+	mprotect(szone, sizeof(szone->basic_zone), PROT_READ);
+
+	return mzone;
+}