diff --git a/libc/malloc_debug/DebugData.h b/libc/malloc_debug/DebugData.h
new file mode 100644
index 0000000..e023c51
--- /dev/null
+++ b/libc/malloc_debug/DebugData.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE
+ * COPYRIGHT OWNER 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.
+ */
+
+#ifndef DEBUG_MALLOC_DEBUGDATA_H
+#define DEBUG_MALLOC_DEBUGDATA_H
+
+#include <stdint.h>
+
+#include <memory>
+#include <vector>
+
+#include <private/bionic_macros.h>
+
+#include "BacktraceData.h"
+#include "Config.h"
+#include "FreeTrackData.h"
+#include "GuardData.h"
+#include "malloc_debug.h"
+#include "TrackData.h"
+
+class DebugData {
+ public:
+  DebugData() = default;
+  ~DebugData() = default;
+
+  bool Initialize();
+
+  static bool Disabled();
+
+  inline void* GetPointer(const Header* header) {
+    uintptr_t value = reinterpret_cast<uintptr_t>(header);
+    return reinterpret_cast<void*>(value + pointer_offset_);
+  }
+
+  Header* GetHeader(const void* pointer) {
+    uintptr_t value = reinterpret_cast<uintptr_t>(pointer);
+    return reinterpret_cast<Header*>(value - pointer_offset_);
+  }
+
+  BacktraceHeader* GetAllocBacktrace(const Header* header) {
+    uintptr_t value = reinterpret_cast<uintptr_t>(header);
+    return reinterpret_cast<BacktraceHeader*>(value + backtrace->alloc_offset());
+  }
+
+  BacktraceHeader* GetFreeBacktrace(const Header* header) {
+    uintptr_t value = reinterpret_cast<uintptr_t>(header);
+    return reinterpret_cast<BacktraceHeader*>(value + backtrace->free_offset());
+  }
+
+  uint8_t* GetFrontGuard(const Header* header) {
+    uintptr_t value = reinterpret_cast<uintptr_t>(header);
+    return reinterpret_cast<uint8_t*>(value + front_guard->offset());
+  }
+
+  uint8_t* GetRearGuard(const Header* header) {
+    uintptr_t value = reinterpret_cast<uintptr_t>(GetPointer(header));
+    return reinterpret_cast<uint8_t*>(value + header->real_size());
+  }
+
+  const Config& config() { return config_; }
+  size_t pointer_offset() { return pointer_offset_; }
+  bool need_header() { return need_header_; }
+  size_t extra_bytes() { return extra_bytes_; }
+
+  std::unique_ptr<BacktraceData> backtrace;
+  std::unique_ptr<TrackData> track;
+  std::unique_ptr<FrontGuardData> front_guard;
+  std::unique_ptr<RearGuardData> rear_guard;
+  std::unique_ptr<FreeTrackData> free_track;
+
+ private:
+  size_t extra_bytes_ = 0;
+
+  size_t pointer_offset_ = 0;
+  bool need_header_ = false;
+
+  Config config_;
+
+  DISALLOW_COPY_AND_ASSIGN(DebugData);
+};
+
+#endif // MALLOC_DEBUG_DEBUGDATA_H