Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCacheEntry.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | da91efe96a93 |
children |
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/* * 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); } }