001/*
002 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 *  This file is licensed to You under the Eclipse Public License (EPL);
005 *  You may not use this file except in compliance with the License. You
006 *  may obtain a copy of the License at
007 *
008 *      http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 *  See the COPYRIGHT.txt file distributed with this work for information
011 *  regarding copyright ownership.
012 */
013package org.mmtk.utility;
014
015import org.mmtk.utility.options.*;
016
017import org.vmmagic.unboxed.*;
018import org.vmmagic.pragma.*;
019
020/*
021 */
022@Uninterruptible abstract class CycleDetector {
023
024  static {
025    Options.cycleFilterThreshold = new CycleFilterThreshold();
026    Options.cycleMetaDataLimit = new CycleMetaDataLimit();
027    Options.cycleTriggerThreshold = new CycleTriggerThreshold();
028  }
029
030  abstract boolean collectCycles(boolean primary, boolean time);
031  abstract void possibleCycleRoot(ObjectReference object);
032}