Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/CMSCollector.java @ 17504:709018897c81
8031695: CHA ignores default methods during analysis leading to incorrect code generation
Reviewed-by: jrose, acorn, hseigel, lfoltan
author | vlivanov |
---|---|
date | Thu, 23 Jan 2014 01:23:23 +0400 |
parents | 55fb97c4c58d |
children | 4ca6dc0799b6 |
line wrap: on
line source
/* * Copyright (c) 2007, 2013, 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.*; public class CMSCollector extends VMObject { private static long markBitMapFieldOffset; public CMSCollector(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("CMSCollector"); markBitMapFieldOffset = type.getField("_markBitMap").getOffset(); } //Accessing mark bitmap public CMSBitMap markBitMap() { return (CMSBitMap) VMObjectFactory.newObject( CMSBitMap.class, addr.addOffsetTo(markBitMapFieldOffset)); } public long blockSizeUsingPrintezisBits(Address addr) { CMSBitMap markBitMap = markBitMap(); long addressSize = VM.getVM().getAddressSize(); if ( markBitMap.isMarked(addr) && markBitMap.isMarked(addr.addOffsetTo(1*addressSize)) ) { Address nextOneAddr = markBitMap.getNextMarkedWordAddress(addr.addOffsetTo(2*addressSize)); //return size in bytes long size = (nextOneAddr.addOffsetTo(1*addressSize)).minus(addr); return size; } else { //missing Printezis marks return -1; } } }