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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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package sun.jvm.hotspot.gc.shared;

import java.io.*;
import java.util.*;

import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.gc.shared.*;
import sun.jvm.hotspot.memory.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.utilities.BitMapInterface;
import sun.jvm.hotspot.utilities.BitMapSegmented;
import sun.jvm.hotspot.utilities.Observable;
import sun.jvm.hotspot.utilities.Observer;

public abstract class CollectedHeap extends VMObject {
  private static long         reservedFieldOffset;

  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("CollectedHeap");

    reservedFieldOffset = type.getField("_reserved").getOffset();
  }

  public CollectedHeap(Address addr) {
    super(addr);
  }

  
Returns the lowest address of the heap.
/** Returns the lowest address of the heap. */
public Address start() { return reservedRegion().start(); } public abstract long capacity(); public abstract long used(); public MemRegion reservedRegion() { return new MemRegion(addr.addOffsetTo(reservedFieldOffset)); } public boolean isIn(Address a) { return isInReserved(a); } public boolean isInReserved(Address a) { return reservedRegion().contains(a); } public abstract CollectedHeapName kind(); public abstract void liveRegionsIterate(LiveRegionsClosure closure); public String oopAddressDescription(OopHandle handle) { return handle.toString(); } public OopHandle oop_load_at(OopHandle handle, long offset) { return handle.getOopHandleAt(offset); } public OopHandle oop_load_in_native(Address addr) { return addr.getOopHandleAt(0); } public void print() { printOn(System.out); } public void printOn(PrintStream tty) { MemRegion mr = reservedRegion(); tty.println("unknown subtype of CollectedHeap @ " + getAddress() + " (" + mr.start() + "," + mr.end() + ")"); } public BitMapInterface createBitMap(long bits) { return new BitMapSegmented(bits); } }