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view agent/src/share/classes/sun/jvm/hotspot/utilities/BasicHashtableEntry.java @ 8790:7f0cb32dd233
8004241: NPG: Metaspace occupies more memory than specified by -XX:MaxMetaspaceSize option
Summary: Enforce MaxMetaspaceSize for both metaspace parts, check MaxMetaspaceSize against "reserved", not "capacity"
Reviewed-by: jmasa, johnc
author | mgerdin |
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date | Thu, 21 Mar 2013 09:07:43 +0100 |
parents | b9a9ed0f8eeb |
children |
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/* * Copyright (c) 2003, 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.utilities; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.oops.Oop; import sun.jvm.hotspot.oops.ObjectHeap; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.runtime.*; public class BasicHashtableEntry extends VMObject { 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("BasicHashtableEntry<mtInternal>"); hashField = type.getCIntegerField("_hash"); nextField = type.getAddressField("_next"); } // Fields private static CIntegerField hashField; private static AddressField nextField; // Accessors public long hash() { return hashField.getValue(addr) & 0xFFFFFFFFL; } private long nextAddressValue() { Debugger dbg = VM.getVM().getDebugger(); Address nextValue = nextField.getValue(addr); return (nextValue != null) ? dbg.getAddressValue(nextValue) : 0L; } public boolean isShared() { return (nextAddressValue() & 1L) != 0; } public BasicHashtableEntry next() { Address nextValue = nextField.getValue(addr); Address next = (nextValue != null)? nextValue.andWithMask(-2L) : null; // using this.getClass so that return type will be as expected in // subclass context. But, because we can't use covariant return type // caller has to use this next and cast the result to correct type. return (BasicHashtableEntry) VMObjectFactory.newObject(this.getClass(), next); } public BasicHashtableEntry(Address addr) { super(addr); } }