--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/oops/RetData.java	Sun Sep 11 14:48:24 2011 -0700
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.oops;
+
+import java.io.*;
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+import sun.jvm.hotspot.utilities.*;
+
+// RetData
+//
+// A RetData is used to access profiling information for a ret bytecode.
+// It is composed of a count of the number of times that the ret has
+// been executed, followed by a series of triples of the form
+// (bci, count, di) which count the number of times that some bci was the
+// target of the ret and cache a corresponding data displacement.
+public class RetData extends CounterData {
+
+  static final int   bci0Offset = counterCellCount;
+  static final int     count0Offset = bci0Offset + 1;
+  static final int     displacement0Offset = count0Offset + 1;
+  static final int     retRowCellCount = (displacement0Offset + 1) - bci0Offset;
+
+  public RetData(DataLayout layout) {
+    super(layout);
+    //assert(layout.tag() == DataLayout.retDataTag, "wrong type");
+  }
+
+  static final int noBci = -1; // value of bci when bci1/2 are not in use.
+
+  static int staticCellCount() {
+    return counterCellCount + MethodData.BciProfileWidth * retRowCellCount;
+  }
+
+  public int cellCount() {
+    return staticCellCount();
+  }
+
+  static int rowLimit() {
+    return MethodData.BciProfileWidth;
+  }
+  static int bciCellIndex(int row) {
+    return bci0Offset + row * retRowCellCount;
+  }
+  static int bciCountCellIndex(int row) {
+    return count0Offset + row * retRowCellCount;
+  }
+  static int bciDisplacementCellIndex(int row) {
+    return displacement0Offset + row * retRowCellCount;
+  }
+
+  // Direct accessors
+  int bci(int row) {
+    return intAt(bciCellIndex(row));
+  }
+  int bciCount(int row) {
+    return uintAt(bciCountCellIndex(row));
+  }
+  int bciDisplacement(int row) {
+    return intAt(bciDisplacementCellIndex(row));
+  }
+
+  // Code generation support
+  static int bciOffset(int row) {
+    return cellOffset(bciCellIndex(row));
+  }
+  static int bciCountOffset(int row) {
+    return cellOffset(bciCountCellIndex(row));
+  }
+  static int bciDisplacementOffset(int row) {
+    return cellOffset(bciDisplacementCellIndex(row));
+  }
+
+  public void printDataOn(PrintStream st) {
+    printShared(st, "RetData");
+    int row;
+    int entries = 0;
+    for (row = 0; row < rowLimit(); row++) {
+      if (bci(row) != noBci)  entries++;
+    }
+    st.println("count(" + count() + ") entries(" + entries + ")");
+    for (row = 0; row < rowLimit(); row++) {
+      if (bci(row) != noBci) {
+        tab(st);
+        st.println(" bci(" + bci(row) + ": count(" + bciCount(row) + ") displacement(" + bciDisplacement(row) + "))");
+      }
+    }
+  }
+}