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Diffstat (limited to 'agent/src/share/classes/sun/jvm/hotspot/memory/AdaptiveFreeList.java')
-rw-r--r-- | agent/src/share/classes/sun/jvm/hotspot/memory/AdaptiveFreeList.java | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/agent/src/share/classes/sun/jvm/hotspot/memory/AdaptiveFreeList.java b/agent/src/share/classes/sun/jvm/hotspot/memory/AdaptiveFreeList.java new file mode 100644 index 000000000..19dca2610 --- /dev/null +++ b/agent/src/share/classes/sun/jvm/hotspot/memory/AdaptiveFreeList.java @@ -0,0 +1,77 @@ +/* + * @(#)AdaptiveFreeList.java + * + * Copyright (c) 2000, 2014, 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.Observable; +import java.util.Observer; + +import sun.jvm.hotspot.debugger.Address; +import sun.jvm.hotspot.runtime.VM; +import sun.jvm.hotspot.runtime.VMObject; +import sun.jvm.hotspot.types.CIntegerField; +import sun.jvm.hotspot.types.Type; +import sun.jvm.hotspot.types.TypeDataBase; + +public class AdaptiveFreeList 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("AdaptiveFreeList<FreeChunk>"); + sizeField = type.getCIntegerField("_size"); + countField = type.getCIntegerField("_count"); + headerSize = type.getSize(); + } + + // Fields + private static CIntegerField sizeField; + private static CIntegerField countField; + private static long headerSize; + + //Constructor + public AdaptiveFreeList(Address address) { + super(address); + } + + // Accessors + public long size() { + return sizeField.getValue(addr); + } + + public long count() { + return countField.getValue(addr); + } + + public static long sizeOf() { + return headerSize; + } +} |