--- /dev/null
+++ libmalloc/libmalloc-166.200.60/tests/MallocBench/Interpreter.cpp
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "CPUCount.h"
+#include "Interpreter.h"
+#include <assert.h>
+#include <cstddef>
+#include <cstdlib>
+#include <errno.h>
+#include <fcntl.h>
+#include <string>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <vector>
+
+#include "mbmalloc.h"
+
+Interpreter::Interpreter(const char* fileName, bool shouldFreeAllObjects)
+    : m_shouldFreeAllObjects(shouldFreeAllObjects)
+{
+    m_fd = open(fileName, O_RDWR, S_IRUSR | S_IWUSR);
+    if (m_fd == -1)
+        fprintf(stderr, "failed to open\n");
+
+    struct stat buf;
+    fstat(m_fd, &buf);
+
+    m_opCount = buf.st_size / sizeof(Op);
+    assert(m_opCount * sizeof(Op) == buf.st_size);
+
+    size_t maxSlot = 0;
+
+    std::vector<Op> ops(1024);
+    size_t remaining = m_opCount * sizeof(Op);
+    while (remaining) {
+        size_t bytes = std::min(remaining, ops.size() * sizeof(Op));
+        remaining -= bytes;
+        read(m_fd, ops.data(), bytes);
+
+        size_t opCount = bytes / sizeof(Op);
+        for (size_t i = 0; i < opCount; ++i) {
+            Op op = ops[i];
+            if (op.slot > maxSlot)
+                maxSlot = op.slot;
+        }
+    }
+
+    m_objects.resize(maxSlot + 1);
+}
+
+Interpreter::~Interpreter()
+{
+    int result = close(m_fd);
+    if (result == -1)
+        fprintf(stderr, "failed to close\n");
+}
+
+void Interpreter::run()
+{
+    std::vector<Op> ops(1024);
+    lseek(m_fd, 0, SEEK_SET);
+    size_t remaining = m_opCount * sizeof(Op);
+    while (remaining) {
+        size_t bytes = std::min(remaining, ops.size() * sizeof(Op));
+        remaining -= bytes;
+        read(m_fd, ops.data(), bytes);
+
+        size_t opCount = bytes / sizeof(Op);
+        for (size_t i = 0; i < opCount; ++i) {
+            Op op = ops[i];
+            switch (op.opcode) {
+            case op_malloc: {
+                m_objects[op.slot] = { mbmalloc(op.size), op.size };
+                assert(m_objects[op.slot].object);
+                bzero(m_objects[op.slot].object, op.size);
+                break;
+            }
+            case op_free: {
+                if (!m_objects[op.slot].object)
+                    continue;
+                mbfree(m_objects[op.slot].object, m_objects[op.slot].size);
+                m_objects[op.slot] = { 0, 0 };
+                break;
+            }
+            case op_realloc: {
+                if (!m_objects[op.slot].object)
+                    continue;
+                m_objects[op.slot] = { mbrealloc(m_objects[op.slot].object, m_objects[op.slot].size, op.size), op.size };
+                break;
+            }
+            default: {
+                fprintf(stderr, "bad opcode: %d\n", op.opcode);
+                abort();
+                break;
+            }
+            }
+        }
+    }
+
+    // A recording might not free all of its allocations.
+    if (!m_shouldFreeAllObjects)
+        return;
+
+    for (size_t i = 0; i < m_objects.size(); ++i) {
+        if (!m_objects[i].object)
+            continue;
+        mbfree(m_objects[i].object, m_objects[i].size);
+        m_objects[i] = { 0, 0 };
+    }
+}