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diff --git a/src/mem/ruby/profiler/StoreTrace.hh b/src/mem/ruby/profiler/StoreTrace.hh
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+
+/*
+ * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
+ * 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;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * 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.
+ */
+
+/*
+ * $Id$
+ *
+ * Description:
+ *
+ */
+
+#ifndef StoreTrace_H
+#define StoreTrace_H
+
+#include "mem/ruby/common/Global.hh"
+#include "mem/ruby/config/RubyConfig.hh"
+#include "mem/ruby/common/Address.hh"
+#include "mem/ruby/common/Histogram.hh"
+
+class StoreTrace {
+public:
+  // Constructors
+  StoreTrace() { }
+  explicit StoreTrace(const Address& addr);
+
+  // Destructor
+  ~StoreTrace();
+
+  // Public Methods
+  void store(NodeID node);
+  void downgrade(NodeID node);
+  int getTotal() const { return m_total_samples; }
+  static void initSummary();
+  static void printSummary(ostream& out);
+  static void clearSummary();
+
+  void print(ostream& out) const;
+private:
+  // Private Methods
+
+  // Private copy constructor and assignment operator
+  //  StoreTrace(const StoreTrace& obj);
+  //  StoreTrace& operator=(const StoreTrace& obj);
+
+  // Class Members (s_ prefix)
+  static bool s_init;
+  static int64 s_total_samples; // Total number of store lifetimes of all lines
+  static Histogram* s_store_count_ptr;
+  static Histogram* s_store_first_to_stolen_ptr;
+  static Histogram* s_store_last_to_stolen_ptr;
+  static Histogram* s_store_first_to_last_ptr;
+
+  // Data Members (m_ prefix)
+
+  Address m_addr;
+  NodeID m_last_writer;
+  Time m_first_store;
+  Time m_last_store;
+  int m_stores_this_interval;
+
+  int64 m_total_samples; // Total number of store lifetimes of this line
+  Histogram m_store_count;
+  Histogram m_store_first_to_stolen;
+  Histogram m_store_last_to_stolen;
+  Histogram m_store_first_to_last;
+};
+
+bool node_less_then_eq(const StoreTrace* n1, const StoreTrace* n2);
+
+// Output operator declaration
+ostream& operator<<(ostream& out, const StoreTrace& obj);
+
+// ******************* Definitions *******************
+
+// Output operator definition
+extern inline
+ostream& operator<<(ostream& out, const StoreTrace& obj)
+{
+  obj.print(out);
+  out << flush;
+  return out;
+}
+
+#endif //StoreTrace_H