| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| 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"); |
| static NamedFieldIdentifier flagsFieldName = new NamedFieldIdentifier("_flags"); |
| |
| public void iterateFields(MetadataVisitor visitor) { |
| visitor.doOop(new OopField(f1FieldName, f1.getOffset() + offset, true), true); |
| visitor.doInt(new IntField(f2FieldName, f2.getOffset() + offset, true), true); |
| visitor.doInt(new IntField(flagsFieldName, flags.getOffset() + offset, true), true); |
| } |
| } |