--- /dev/null
+++ libmalloc/libmalloc-792.41.1/tools/malloc_replay.h
@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 2018 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 __MALLOC_REPLAY_H
+#define __MALLOC_REPLAY_H
+
+#include "trace.h"
+#include <vector>
+
+//
+//Our file format
+//
+
+// Definitions for the event chunk.
+#define MALLOC_EVENTS_TAG	(uint32_t)0xe001e001
+#define MALLOC_EVENTS_V_MAJOR	1
+#define MALLOC_EVENTS_V_MINOR	1
+
+enum operation {
+    op_malloc = 0x01,
+    op_free = 0x02,
+    op_realloc = 0x03,
+    op_memalign = 0x04,
+    op_calloc = 0x05,
+    op_valloc = 0x06,
+};
+
+static const int operation_count = op_valloc;
+static const char *mcall_names[] = {"malloc", "free", "realloc", "memalign", "calloc", "valloc"};
+
+static inline const char *
+mcall_to_name(int call_num) {
+	if (call_num > 0 && call_num <= operation_count) {
+		return mcall_names[call_num - 1];
+	}
+	return NULL;
+}
+
+enum flags {
+    flag_stacks     = 0x00000001,
+    flag_timestamps = 0x00000002
+};
+
+struct compressed_header {
+    uint16_t version;
+    uint64_t flags;
+} __attribute__((packed));
+
+struct compressed_operation {
+	uint8_t opcode;
+	uint8_t core;
+	uint32_t body[];
+}__attribute__((packed));
+
+struct compressed_alloc {
+    uint64_t address;
+    uint32_t size;
+} __attribute__((packed));
+
+struct compressed_calloc {
+    uint64_t address;
+    uint32_t count;
+    uint32_t size;
+} __attribute__((packed));
+
+struct compressed_memalign {
+    uint64_t address;
+    uint32_t alignment;
+    uint32_t size;
+} __attribute__((packed));
+
+struct compressed_free {
+    uint64_t address;
+} __attribute__((packed));
+
+struct compressed_realloc {
+    uint64_t oldAddress;
+    uint64_t newAddress;
+    uint32_t size;
+} __attribute__((packed));
+
+struct compressed_stack_key {
+    uint64_t stackKey;
+} __attribute__((packed));
+
+struct compressed_time {
+    uint64_t timestamp;
+} __attribute__((packed));
+
+
+//
+//Our allocator to allocate from a specific zone.
+//
+extern malloc_zone_t* s_zone;
+
+template <class T>
+class ReplayAllocator {
+public:
+    // type definitions
+    typedef T        value_type;
+    typedef T*       pointer;
+    typedef const T* const_pointer;
+    typedef T&       reference;
+    typedef const T& const_reference;
+    typedef std::size_t    size_type;
+    typedef std::ptrdiff_t difference_type;
+
+    // rebind allocator to type U
+    template <class U>
+    struct rebind {
+        typedef ReplayAllocator<U> other;
+    };
+
+    // return address of values
+    pointer address (reference value) const
+	{
+        return &value;
+    }
+    const_pointer address (const_reference value) const
+	{
+        return &value;
+    }
+
+    /* constructors and destructor
+     * - nothing to do because the allocator has no state
+     */
+    ReplayAllocator() throw() { }
+    ReplayAllocator(const ReplayAllocator&) throw() { }
+    template <class U>
+    ReplayAllocator (const ReplayAllocator<U>&) throw() { }
+    ~ReplayAllocator() throw() { }
+
+    // return maximum number of elements that can be allocated
+    size_type max_size () const throw()
+	{
+        return std::numeric_limits<std::size_t>::max() / sizeof(T);
+    }
+
+    // allocate but don't initialize num elements of type T
+    pointer allocate (size_type num, const void* = 0)
+	{
+        return (pointer)malloc_zone_malloc(s_zone, num * sizeof(T));
+    }
+
+    // initialize elements of allocated storage p with value value
+    void construct (pointer p, const T& value)
+	{
+        // initialize memory with placement new
+        new((void*)p)T(value);
+    }
+
+    // destroy elements of initialized storage p
+    void destroy (pointer p)
+	{
+        // destroy objects by calling their destructor
+        p->~T();
+    }
+
+    // deallocate storage p of deleted elements
+    void deallocate (pointer p, size_type num)
+	{
+        malloc_zone_free(s_zone, p);
+    }
+};
+
+template <class T1, class T2>
+bool operator== (const ReplayAllocator<T1>&,
+                 const ReplayAllocator<T2>&) throw()
+{
+    return true;
+}
+template <class T1, class T2>
+bool operator!= (const ReplayAllocator<T1>&,
+                 const ReplayAllocator<T2>&) throw()
+{
+    return false;
+}
+
+typedef struct replay_malloc_magazine {
+    uint64_t baseAddress;
+    uint64_t extent;
+    uint32_t pages_dirty;
+} *replay_malloc_magazine_t;
+
+typedef struct replay_malloc_zone {
+    const char* name;
+    std::vector<replay_malloc_magazine, ReplayAllocator<replay_malloc_magazine> > magazines;
+} *replay_malloc_zone_t;
+
+
+#endif // __MALLOC_REPLAY_H