/*
* Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package sun.jvm.hotspot.gc.z;
import sun.jvm.hotspot.debugger.Address;
import sun.jvm.hotspot.runtime.VM;
import sun.jvm.hotspot.runtime.VMObject;
import sun.jvm.hotspot.types.AddressField;
import sun.jvm.hotspot.types.Type;
import sun.jvm.hotspot.types.TypeDataBase;
public class ZGranuleMapForPageTable extends VMObject {
private static AddressField mapField;
static {
VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase()));
}
static private synchronized void initialize(TypeDataBase db) {
Type type = db.lookupType("ZGranuleMapForPageTable");
mapField = type.getAddressField("_map");
}
public ZGranuleMapForPageTable(Address addr) {
super(addr);
}
private Address map() {
return mapField.getValue(addr);
}
public long size() {
return ZGlobals.ZAddressOffsetMax >> ZGlobals.ZGranuleSizeShift;
}
private long index_for_addr(Address addr) {
long index = ZAddress.offset(addr) >> ZGlobals.ZGranuleSizeShift;
return index;
}
Address at(long index) {
return map().getAddressAt(index * VM.getVM().getBytesPerLong());
}
Address get(Address addr) {
long index = index_for_addr(addr);
return at(index);
}
public class Iterator {
/**代码未完, 请加载全部代码(NowJava.com).**/