--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/memory/Generation.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2000-2005 Sun Microsystems, Inc.  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.memory;
+
+import java.io.*;
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.types.*;
+import sun.jvm.hotspot.runtime.*;
+
+/** <P> The (supported) Generation hierarchy currently looks like this: </P>
+
+    <ul>
+    <li> Generation
+      <ul>
+      <li> CardGeneration
+        <ul>
+        <li> OneContigSpaceCardGeneration
+          <ul>
+          <li> CompactingPermGenGen
+          <li> TenuredGeneration
+          </ul>
+        </ul>
+      <li> DefNewGeneration
+      </ul>
+    </ul>
+*/
+
+
+public abstract class Generation extends VMObject {
+  private static long          reservedFieldOffset;
+  private static long          virtualSpaceFieldOffset;
+  private static CIntegerField levelField;
+  protected static final int  K = 1024;
+  // Fields for class StatRecord
+  private static Field         statRecordField;
+  private static CIntegerField invocationField;
+
+  // constants from Name enum
+  private static int NAME_DEF_NEW;
+  private static int NAME_PAR_NEW;
+  private static int NAME_MARK_SWEEP_COMPACT;
+  private static int NAME_CONCURRENT_MARK_SWEEP;
+  private static int NAME_OTHER;
+
+  static {
+    VM.registerVMInitializedObserver(new Observer() {
+        public void update(Observable o, Object data) {
+          initialize(VM.getVM().getTypeDataBase());
+        }
+      });
+  }
+
+  private static synchronized void initialize(TypeDataBase db) {
+    Type type = db.lookupType("Generation");
+
+    reservedFieldOffset     = type.getField("_reserved").getOffset();
+    virtualSpaceFieldOffset = type.getField("_virtual_space").getOffset();
+    levelField              = type.getCIntegerField("_level");
+    // StatRecord
+    statRecordField         = type.getField("_stat_record");
+    type                    = db.lookupType("Generation::StatRecord");
+    invocationField         = type.getCIntegerField("invocations");
+
+    // constants from Generation::Name
+    NAME_DEF_NEW = db.lookupIntConstant("Generation::DefNew").intValue();
+    NAME_PAR_NEW = db.lookupIntConstant("Generation::ParNew").intValue();
+    NAME_MARK_SWEEP_COMPACT = db.lookupIntConstant("Generation::MarkSweepCompact").intValue();
+    NAME_CONCURRENT_MARK_SWEEP = db.lookupIntConstant("Generation::ConcurrentMarkSweep").intValue();
+    NAME_OTHER = db.lookupIntConstant("Generation::Other").intValue();
+  }
+
+  public Generation(Address addr) {
+    super(addr);
+  }
+
+  public static class Name {
+    public static final Name DEF_NEW = new Name("DefNew");
+    public static final Name PAR_NEW = new Name("ParNew");
+    public static final Name MARK_SWEEP_COMPACT = new Name("MarkSweepCompact");
+    public static final Name CONCURRENT_MARK_SWEEP = new Name("ConcurrentMarkSweep");
+    public static final Name OTHER = new Name("Other");
+
+    private Name(String value) {
+      this.value = value;
+    }
+
+    private String value;
+    public String toString() {
+      return value;
+    }
+  }
+
+  public Generation.Name kind() {
+    return Generation.Name.OTHER;
+  }
+
+  static Generation.Name nameForEnum(int value) {
+     if (value == NAME_DEF_NEW) {
+        return Name.DEF_NEW;
+     } else if (value == NAME_PAR_NEW) {
+        return Name.PAR_NEW;
+     } else if (value == NAME_MARK_SWEEP_COMPACT) {
+        return Name.MARK_SWEEP_COMPACT;
+     } else if (value == NAME_CONCURRENT_MARK_SWEEP) {
+        return Name.CONCURRENT_MARK_SWEEP;
+     } else if (value == NAME_OTHER) {
+        return Name.OTHER;
+     } else {
+        throw new RuntimeException("should not reach here");
+     }
+  }
+
+  public GenerationSpec spec() {
+    return ((GenCollectedHeap) VM.getVM().getUniverse().heap()).spec(level());
+  }
+
+  public int level() {
+    return (int) levelField.getValue(addr);
+  }
+
+  public int invocations() {
+    return getStatRecord().getInvocations();
+  }
+
+  /** The maximum number of object bytes the generation can currently
+      hold. */
+  public abstract long capacity();
+
+  /** The number of used bytes in the gen. */
+  public abstract long used();
+
+  /** The number of free bytes in the gen. */
+  public abstract long free();
+
+  /** The largest number of contiguous free words in the generation,
+      including expansion. (VM's version assumes it is called at a
+      safepoint.)  */
+  public abstract long contiguousAvailable();
+
+  public MemRegion reserved() {
+    return new MemRegion(addr.addOffsetTo(reservedFieldOffset));
+  }
+
+  /** Returns a region guaranteed to contain all the objects in the
+      generation. */
+  public MemRegion usedRegion() {
+    return reserved();
+  }
+
+  /* Returns "TRUE" iff "p" points into an allocated object in the
+     generation. */
+  public boolean isIn(Address p) {
+    GenerationIsInClosure blk = new GenerationIsInClosure(p);
+    spaceIterate(blk);
+    return (blk.space() != null);
+  }
+
+  /** Returns "TRUE" iff "p" points into the reserved area of the
+     generation. */
+  public boolean isInReserved(Address p) {
+    return reserved().contains(p);
+  }
+
+  protected VirtualSpace virtualSpace() {
+    return (VirtualSpace) VMObjectFactory.newObject(VirtualSpace.class, addr.addOffsetTo(virtualSpaceFieldOffset));
+  }
+
+  public abstract String name();
+
+  /** Equivalent to spaceIterate(blk, false) */
+  public void spaceIterate(SpaceClosure blk) {
+    spaceIterate(blk, false);
+  }
+
+  /** Iteration - do not use for time critical operations */
+  public abstract void spaceIterate(SpaceClosure blk, boolean usedOnly);
+
+  public void print() { printOn(System.out); }
+  public abstract void printOn(PrintStream tty);
+
+  public static class StatRecord extends VMObject {
+    public StatRecord(Address addr) {
+      super(addr);
+    }
+
+    public int getInvocations() {
+      return (int) invocationField.getValue(addr);
+    }
+
+  }
+
+  private StatRecord getStatRecord() {
+    return (StatRecord) VMObjectFactory.newObject(Generation.StatRecord.class, addr.addOffsetTo(statRecordField.getOffset()));
+  }
+}