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diff --git a/src/base/annotate.hh b/src/base/annotate.hh
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+/*
+ * Copyright (c) 2006 The Regents of The University of Michigan
+ * 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.
+ *
+ * Authors: Ali Saidi
+ */
+
+#ifndef __BASE__ANNOTATE_HH__
+#define __BASE__ANNOTATE_HH__
+
+#include "sim/host.hh"
+
+#include <string>
+#include <list>
+#include <map>
+
+
+class System;
+
+namespace Annotate {
+
+
+class Annotate {
+
+  protected:
+    struct AnnotateData {
+        Tick time;
+        std::string system;
+        Addr stack;
+        uint32_t stateMachine;
+        uint32_t curState;
+        uint32_t waitMachine;
+        uint32_t waitState;
+    };
+
+    std::list<AnnotateData*> data;
+    std::map<System*, std::string> nameCache;
+
+  public:
+   Annotate();
+   void add(System *sys, Addr stack, uint32_t sm, uint32_t st, uint32_t
+           wm, uint32_t ws);
+   void dump();
+};
+
+extern Annotate annotations;
+} //namespace Annotate
+
+#endif //__BASE__ANNOTATE_HH__
+