/*
* Copyright (c) 2001, 2012, 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.oops;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.utilities.*;
public class ConstantPoolCacheEntry {
private static long size;
private static long baseOffset;
private static CIntegerField indices;
private static AddressField f1;
private static CIntegerField f2;
private static CIntegerField flags;
private ConstantPoolCache cp;
private long offset;
static {
VM.registerVMInitializedObserver(new Observer() {
public void update(Observable o, Object data) {
initialize(VM.getVM().getTypeDataBase());
}
});
}
private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
Type type = db.lookupType("ConstantPoolCacheEntry");
size = type.getSize();
indices = type.getCIntegerField("_indices");
f1 = type.getAddressField ("_f1");
f2 = type.getCIntegerField("_f2");
flags = type.getCIntegerField("_flags");
type = db.lookupType("ConstantPoolCache");
baseOffset = type.getSize();
}
ConstantPoolCacheEntry(ConstantPoolCache cp, int index) {
this.cp = cp;
offset = baseOffset + index * size;
}
public int getConstantPoolIndex() {
if (Assert.ASSERTS_ENABLED) {
Assert.that((getIndices() & 0xFFFF) != 0, "must be main entry");
}
return (int) (getIndices() & 0xFFFF);
}
private long getIndices() {
return cp.getAddress().getCIntegerAt(indices.getOffset() + offset, indices.getSize(), indices.isUnsigned());
}
public Metadata getF1() {
return Metadata.instantiateWrapperFor(cp.getAddress().getAddressAt(f1.getOffset() + offset));
}
public int getF2() {
return cp.getAddress().getJIntAt(f1.getOffset() + offset);
}
public int getFlags() {
return cp.getAddress().getJIntAt(flags.getOffset() + offset);
}
static NamedFieldIdentifier f1FieldName = new NamedFieldIdentifier("_f1");
static NamedFieldIdentifier f2FieldName = new NamedFieldIdentifier("_f2");
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