--- /dev/null
+++ libmalloc/libmalloc-409.81.2/src/vm.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2016 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@
+ */
+
+
+#ifndef __VM_H
+#define __VM_H
+
+static inline bool
+mvm_aslr_enabled(void)
+{
+	return _dyld_get_image_slide((const struct mach_header *)_NSGetMachExecuteHeader()) != 0;
+}
+
+MALLOC_NOEXPORT
+void
+mvm_aslr_init(void);
+
+MALLOC_NOEXPORT
+void *
+mvm_allocate_pages(size_t size, unsigned char align, uint32_t debug_flags, int vm_page_label);
+
+MALLOC_NOEXPORT
+void
+mvm_deallocate_pages(void *addr, size_t size, unsigned debug_flags);
+
+MALLOC_NOEXPORT
+int
+mvm_madvise_free(void *szone, void *r, uintptr_t pgLo, uintptr_t pgHi, uintptr_t *last, boolean_t scribble);
+
+MALLOC_NOEXPORT
+void
+mvm_protect(void *address, size_t size, unsigned protection, unsigned debug_flags);
+
+#if CONFIG_DEFERRED_RECLAIM
+MALLOC_NOEXPORT
+kern_return_t
+mvm_deferred_reclaim_init(void);
+
+MALLOC_NOEXPORT
+bool
+mvm_reclaim_mark_used(uint64_t id, mach_vm_address_t ptr, uint32_t size, unsigned int debug_flags);
+
+MALLOC_NOEXPORT
+uint64_t
+mvm_reclaim_mark_free(vm_address_t ptr, uint32_t size, unsigned int debug_flags);
+
+MALLOC_NOEXPORT
+bool
+mvm_reclaim_is_available(uint64_t id);
+#endif // CONFIG_DEFERRED_RECLAIM
+
+#endif // __VM_H