MixedObjectDeclarationOrderIterator.cpp

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 * Copyright (c) 1991, 2020 IBM Corp. and others
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 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
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 *
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 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
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/**
 * @file
 * @ingroup GC_Structs
 */

#include "j9.h"
#include "j9cfg.h"

#include "MixedObjectDeclarationOrderIterator.hpp"

/**
 * Gets the next slot (by declaration order) in the object containing an object reference.
 * @return the next slot in the object containing an object reference
 * @return NULL if there are no more such slots
 */
GC_SlotObject *
GC_MixedObjectDeclarationOrderIterator::nextSlot()
{
	if (NULL == _fieldShape) {
		return NULL;
	}

	_slotObject.writeAddressToSlot((fomrobject_t*)((uintptr_t)_objectPtr + _walkState.fieldOffsetWalkState.result.offset + J9JAVAVM_OBJECT_HEADER_SIZE(_javaVM)));
	_index = _walkState.referenceIndexOffset + _walkState.classIndexAdjust + _walkState.fieldOffsetWalkState.result.index - 1;
	_fieldShape = _javaVM->internalVMFunctions->fullTraversalFieldOffsetsNextDo(&_walkState);
	return &_slotObject;
}