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     */
013    package org.mmtk.plan.semispace.gctrace;
014    
015    import org.mmtk.plan.semispace.SSConstraints;
016    
017    import org.vmmagic.pragma.*;
018    
019    /**
020     * GCTrace constants.
021     */
022    @Uninterruptible
023    public class GCTraceConstraints extends SSConstraints {
024      @Override
025      public boolean needsObjectReferenceWriteBarrier() { return true; }
026      @Override
027      public boolean generateGCTrace() { return true; }
028    }