Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/oops/ConstantPoolCacheEntry.java @ 4629:29da09bf4930
Fix a problem with having a MemoryCheckpoint that is also a ControlSplit (InvokeWithException), the ANY_LOCATION can not be this control split in both branches because it may lead to scheduling problems : make ExceptionObject a MemoryCheckpoint
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Fri, 17 Feb 2012 13:54:39 +0100 |
parents | 0a8e0d4345b3 |
children | da91efe96a93 |
line wrap: on
line source
/* * Copyright (c) 2001, 2010, 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 sun.jvm.hotspot.types.OopField 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.getOopField ("_f1"); f2 = type.getCIntegerField("_f2"); flags = type.getCIntegerField("_flags"); type = db.lookupType("constantPoolCacheOopDesc"); baseOffset = type.getSize(); } ConstantPoolCacheEntry(ConstantPoolCache cp, int index) { this.cp = cp; offset = baseOffset + index * size; } public int getConstantPoolIndex() { if (Assert.ASSERTS_ENABLED) { Assert.that(!isSecondaryEntry(), "must not be a secondary CP entry"); } return (int) (getIndices() & 0xFFFF); } public boolean isSecondaryEntry() { return (getIndices() & 0xFFFF) == 0; } public int getMainEntryIndex() { if (Assert.ASSERTS_ENABLED) { Assert.that(isSecondaryEntry(), "must be a secondary CP entry"); } return (int) (getIndices() >>> 16); } private long getIndices() { return cp.getHandle().getCIntegerAt(indices.getOffset() + offset, indices.getSize(), indices.isUnsigned()); } public Oop getF1() { return cp.getHeap().newOop(cp.getHandle().getOopHandleAt(f1.getOffset() + offset)); } public int getF2() { return cp.getHandle().getJIntAt(f1.getOffset() + offset); } public int getFlags() { return cp.getHandle().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(OopVisitor 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); } }