/*
* Copyright (c) 2015, 2017, 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.
*
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package sun.jvm.hotspot.compiler;
import sun.jvm.hotspot.debugger.Address;
import sun.jvm.hotspot.runtime.VM;
import sun.jvm.hotspot.types.CIntegerField;
import sun.jvm.hotspot.types.Type;
import sun.jvm.hotspot.types.TypeDataBase;
import java.util.Observable;
import java.util.Observer;
public class ImmutableOopMapPair {
private static CIntegerField pcOffsetField;
private static CIntegerField oopmapOffsetField;
private static long classSize;
static {
VM.registerVMInitializedObserver(new Observer() {
public void update(Observable o, Object data) {
initialize(VM.getVM().getTypeDataBase());
}
});
}
private final Address address;
public ImmutableOopMapPair(Address address) {
this.address = address;
}
public static long classSize() {
return classSize;
}
public int getPC() {
return (int) pcOffsetField.getValue(address);
}
public int getOffset() {
return (int) oopmapOffsetField.getValue(address);
}
private static void initialize(TypeDataBase db) {
Type type = db.lookupType("ImmutableOopMapPair");
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