--- /dev/null
+++ libmalloc/libmalloc-715.100.22/include/malloc/_ptrcheck.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2023 Apple Computer, 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 _MALLOC_UNDERSCORE_PTRCHECK_H_
+#define _MALLOC_UNDERSCORE_PTRCHECK_H_
+
+#if __has_include(<ptrcheck.h>)
+#include <ptrcheck.h>
+#else
+#define __has_ptrcheck 0
+#define __single
+#define __unsafe_indexable
+#define __counted_by(N)
+#define __counted_by_or_null(N)
+#define __sized_by(N)
+#define __sized_by_or_null(N)
+#define __ended_by(E)
+#define __terminated_by(T)
+#define __null_terminated
+#define __ptrcheck_abi_assume_single()
+#endif
+
+#endif /* _MALLOC_UNDERSCORE_PTRCHECK_H_ */