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view agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/HeapRegionSetBase.java @ 4830:0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
Summary: Extend the jmap -heap output for G1 to include some more G1-specific information.
Reviewed-by: brutisso, johnc, poonam
author | tonyp |
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date | Wed, 18 Jan 2012 10:30:12 -0500 |
parents | |
children | 720b6a76dd9d |
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/* * Copyright (c) 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.gc_implementation.g1; import java.util.Iterator; 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.runtime.VMObjectFactory; import sun.jvm.hotspot.types.AddressField; import sun.jvm.hotspot.types.CIntegerField; import sun.jvm.hotspot.types.Type; import sun.jvm.hotspot.types.TypeDataBase; // Mirror class for HeapRegionSetBase. Represents a group of regions. public class HeapRegionSetBase extends VMObject { // size_t _length; static private CIntegerField lengthField; // size_t _region_num; static private CIntegerField regionNumField; // size_t _total_used_bytes; static private CIntegerField totalUsedBytesField; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } static private synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("HeapRegionSetBase"); lengthField = type.getCIntegerField("_length"); regionNumField = type.getCIntegerField("_region_num"); totalUsedBytesField = type.getCIntegerField("_total_used_bytes"); } public long length() { return lengthField.getValue(addr); } public long regionNum() { return regionNumField.getValue(addr); } public long totalUsedBytes() { return totalUsedBytesField.getValue(addr); } public HeapRegionSetBase(Address addr) { super(addr); } }