/*

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

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.*;

public class MethodCounters extends Metadata {

  public MethodCounters(Address addr) {

    super(addr);

  }

  static {

    VM.registerVMInitializedObserver(new Observer() {

        public void update(Observable o, Object data) {

          initialize(VM.getVM().getTypeDataBase());

        }

      });

  }

  private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {

    Type type      = db.lookupType("MethodCounters");

    if (!VM.getVM().isCore()) {

      invocationCounter        = new CIntField(type.getCIntegerField("_invocation_counter"), 0);

      backedgeCounter          = new CIntField(type.getCIntegerField("_backedge_counter"), 0);

    }

  }

  private static CIntField interpreterInvocationCountField;

  private static CIntField interpreterThrowoutCountField;

  private static CIntField invocationCounter;

  private static CIntField backedgeCounter;

  public int interpreterInvocationCount() {

  }

  public int interpreterThrowoutCount() {

  }

  public long getInvocationCounter() {

    if (Assert.ASSERTS_ENABLED) {

      Assert.that(!VM.getVM().isCore(), "must not be used in core build");

    }

    return invocationCounter.getValue(this);

  }

  public long getBackedgeCounter() {

    if (Assert.ASSERTS_ENABLED) {

      Assert.that(!VM.getVM().isCore(), "must not be used in core build");

    }

    return backedgeCounter.getValue(this);

  }

  public void printValueOn(PrintStream tty) {

  }

}