Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/CMSBitMap.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 |
---|---|
date | Thu, 21 Mar 2013 09:07:43 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2007, 2010, 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.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; public class CMSBitMap extends VMObject { private static AddressField bmStartWordField; private static CIntegerField bmWordSizeField; private static CIntegerField shifterField; //private static AddressField bmField; private static long virtualSpaceFieldOffset; public CMSBitMap(Address addr) { super(addr); } 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("CMSBitMap"); bmStartWordField = type.getAddressField("_bmStartWord"); bmWordSizeField = type.getCIntegerField("_bmWordSize"); shifterField = type.getCIntegerField("_shifter"); //bmField = type.getAddressField("_bm"); virtualSpaceFieldOffset = type.getField("_virtual_space").getOffset(); } public void printAll() { System.out.println("bmStartWord(): "+bmStartWord()); System.out.println("bmWordSize(): "+bmWordSize()); System.out.println("shifter(): "+shifter()); } public Address bmStartWord() { return bmStartWordField.getValue(addr); } public long bmWordSize() { return bmWordSizeField.getValue(addr); } public long shifter() { return shifterField.getValue(addr); } public VirtualSpace virtualSpace() { return (VirtualSpace) VMObjectFactory.newObject(VirtualSpace.class, addr.addOffsetTo(virtualSpaceFieldOffset)); } public BitMap bm() { BitMap bitMap = new BitMap((int) (bmWordSize() >> shifter() )); VirtualSpace vs = virtualSpace(); bitMap.set_map(vs.low()); return bitMap; } public Address getNextMarkedWordAddress(Address addr) { Address endWord = bmStartWord().addOffsetTo(bmWordSize()); int nextOffset = bm().getNextOneOffset(heapWordToOffset(addr), heapWordToOffset(endWord) ); Address nextAddr = offsetToHeapWord(nextOffset); return nextAddr; } int heapWordToOffset(Address addr) { int temp = (int)addr.minus(bmStartWord()) / (int) VM.getVM().getAddressSize(); int ret_val = temp >> shifter(); return ret_val; } Address offsetToHeapWord(int offset) { int temp = offset << shifter(); return bmStartWord().addOffsetTo(temp*VM.getVM().getAddressSize()); } boolean isMarked(Address addr) { BitMap bm = bm(); return bm.at(heapWordToOffset(addr)); } }