GlobalCollectionCardCleaner.cpp

/*******************************************************************************
 * Copyright (c) 1991, 2014 IBM Corp. and others
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] http://openjdk.java.net/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
 *******************************************************************************/

#include "j9.h"
#include "j9cfg.h"
#include "j9port.h"
#include "modronopt.h"

#include "GlobalCollectionCardCleaner.hpp"

#include "CycleState.hpp"
#include "EnvironmentVLHGC.hpp"
#include "GlobalMarkingScheme.hpp"

void
MM_GlobalCollectionCardCleaner::clean(MM_EnvironmentBase *envModron, void *lowAddress, void *highAddress, Card *cardToClean)
{
	MM_EnvironmentVLHGC* env = MM_EnvironmentVLHGC::getEnvironment(envModron);
	Assert_MM_true(MM_CycleState::CT_GLOBAL_GARBAGE_COLLECTION == env->_cycleState->_collectionType);
	Assert_MM_true(NULL != _markingScheme);
	
	Card fromState = *cardToClean;
	Assert_MM_false(CARD_CLEAN == fromState);
	Card toState = CARD_CLEAN;
	*cardToClean = toState;
	
	_markingScheme->scanObjectsInRange(env, lowAddress, highAddress);
}