/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.mmtk.plan.generational.immix;
import static org.mmtk.policy.immix.ImmixConstants.MARK_LINE_AT_SCAN_TIME;
import org.mmtk.plan.generational.GenCollector;
import org.mmtk.plan.generational.GenMatureTraceLocal;
import org.mmtk.plan.Trace;
import org.mmtk.policy.Space;
import org.vmmagic.unboxed.*;
import org.vmmagic.pragma.*;
/**
* This class implements the core functionality for a transitive
* closure over the heap graph, specifically in a generational immix
* collector.
*/
@Uninterruptible
public final class GenImmixMatureTraceLocal extends GenMatureTraceLocal{
/**
* @param global the global trace class to use
* @param plan the state of the generational collector
*/
public GenImmixMatureTraceLocal(Trace global, GenCollector plan) {
super(GenImmix.SCAN_IMMIX, global, plan);
}
@Override
@Inline
public ObjectReference traceObject(ObjectReference object) {
if (object.isNull()) return object;
if (Space.isInSpace(GenImmix.IMMIX, object)) {
return GenImmix.immixSpace.fastTraceObject(this, object);
}
return super.traceObject(object);
}
@Override
public boolean isLive(ObjectReference object) {
if (object.isNull()) return false;
if (Space.isInSpace(GenImmix.IMMIX, object)) {
return GenImmix.immixSpace.isLive(object);
}
return super.isLive(object);
}
@Override
public boolean willNotMoveInCurrentCollection(ObjectReference object) {
if (Space.isInSpace(GenImmix.IMMIX, object)) {
return true;
}
return super.willNotMoveInCurrentCollection(object);
}
@Inline
@Override
protected void scanObject(ObjectReference object) {
super.scanObject(object);
if (MARK_LINE_AT_SCAN_TIME && Space.isInSpace(GenImmix.IMMIX, object))
GenImmix.immixSpace.markLines(object);
}
}