Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/java_lang_Class.java @ 5981:4bec1b1f7b33
7156960: Incorrect copyright headers in parts of the Serviceability agent
Summary: Errant files added as part of 7088955 fix. The Copyright information now corrected with gpl-header template
Reviewed-by: sla, ohair, mbykov
author | minqi |
---|---|
date | Wed, 28 Mar 2012 14:27:38 -0700 |
parents | e6b1331a51d2 |
children | da91efe96a93 |
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/* * Copyright (c) 2011, 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.memory.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.Type; import sun.jvm.hotspot.types.TypeDataBase; import sun.jvm.hotspot.utilities.*; import sun.jvm.hotspot.jdi.JVMTIThreadState; /** A utility class encapsulating useful oop operations */ // initialize fields for java.lang.Class public class java_lang_Class { // java.lang.Class fields static OopField klassField; static IntField oopSizeField; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { // klass and oop_size are HotSpot magic fields and hence we can't // find them from InstanceKlass for java.lang.Class. Type jlc = db.lookupType("java_lang_Class"); int klassOffset = (int) jlc.getCIntegerField("_klass_offset").getValue(); if (VM.getVM().isCompressedOopsEnabled()) { klassField = new NarrowOopField(new NamedFieldIdentifier("klass"), klassOffset, true); } else { klassField = new OopField(new NamedFieldIdentifier("klass"), klassOffset, true); } int oopSizeOffset = (int) jlc.getCIntegerField("_oop_size_offset").getValue(); oopSizeField = new IntField(new NamedFieldIdentifier("oop_size"), oopSizeOffset, true); } /** get klassOop field at offset hc_klass_offset from a java.lang.Class object */ public static Klass asKlass(Oop aClass) { return (Klass) java_lang_Class.klassField.getValue(aClass); } /** get oop_size field at offset oop_size_offset from a java.lang.Class object */ public static long getOopSize(Oop aClass) { return java_lang_Class.oopSizeField.getValue(aClass); } }