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view agent/src/share/classes/sun/jvm/hotspot/memory/LoaderConstraintEntry.java @ 12704:0e998f0daddf
Code cache: make sure we collect statistics even if the compiler is not recognized
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 07 Nov 2013 11:17:23 +0100 |
parents | 1d1603768966 |
children |
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/* * Copyright (c) 2003, 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.memory; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.utilities.*; public class LoaderConstraintEntry extends sun.jvm.hotspot.utilities.HashtableEntry { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("LoaderConstraintEntry"); nameField = type.getAddressField("_name"); numLoadersField = type.getCIntegerField("_num_loaders"); maxLoadersField = type.getCIntegerField("_max_loaders"); loadersField = type.getAddressField("_loaders"); } // Fields private static AddressField nameField; private static CIntegerField numLoadersField; private static CIntegerField maxLoadersField; private static AddressField loadersField; // Accessors public Symbol name() { return Symbol.create(nameField.getValue(addr)); } public int numLoaders() { return (int) numLoadersField.getValue(addr); } public int maxLoaders() { return (int) maxLoadersField.getValue(addr); } public Oop initiatingLoader(int i) { if (Assert.ASSERTS_ENABLED) { Assert.that(i >= 0 && i < numLoaders(), "invalid index"); } Address loaders = loadersField.getValue(addr); OopHandle loader = loaders.addOffsetToAsOopHandle(i * VM.getVM().getOopSize()); return VM.getVM().getObjectHeap().newOop(loader); } public LoaderConstraintEntry(Address addr) { super(addr); } /* covariant return type :-( public LoaderConstraintEntry next() { return (LoaderConstraintEntry) super.next(); } For now, let the caller cast it .. */ }