diff --git a/src/offsets.h b/src/offsets.h
new file mode 100644
index 0000000..33f395f
--- /dev/null
+++ b/src/offsets.h
@@ -0,0 +1,49 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+// Author: cshapiro@google.com (Carl Shapiro)
+
+#ifndef ART_SRC_OFFSETS_H_
+#define ART_SRC_OFFSETS_H_
+
+#include <iostream>  // NOLINT
+#include "src/globals.h"
+
+namespace art {
+
+// Allow the meaning of offsets to be strongly typed
+class Offset {
+ public:
+  explicit Offset(size_t val) : val_(val) {}
+  int32_t Int32Value() const {
+    return static_cast<int32_t>(val_);
+  }
+  uint32_t Uint32Value() const {
+    return static_cast<uint32_t>(val_);
+  }
+ protected:
+  size_t val_;
+};
+std::ostream& operator<<(std::ostream& os, const Offset& offs);
+
+// Offsets relative to the current frame
+class FrameOffset : public Offset {
+ public:
+  explicit FrameOffset(size_t val) : Offset(val) {}
+  bool operator>(FrameOffset other) const { return val_ > other.val_; }
+  bool operator<(FrameOffset other) const { return val_ < other.val_; }
+};
+
+// Offsets relative to the current running thread
+class ThreadOffset : public Offset {
+ public:
+  explicit ThreadOffset(size_t val) : Offset(val) {}
+};
+
+// Offsets relative to an object
+class MemberOffset : public Offset {
+ public:
+  explicit MemberOffset(size_t val) : Offset(val) {}
+};
+
+}  // namespace art
+
+#endif  // ART_SRC_OFFSETS_H_