Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/ContiguousSpace.java @ 19491:4d66c000d253
Truffle/Instrumentation: more cleanup in Probe
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Wed, 18 Feb 2015 18:30:49 -0800 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2004, 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 ContiguousSpace extends CompactibleSpace { private static AddressField topField; 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("ContiguousSpace"); topField = type.getAddressField("_top"); } public ContiguousSpace(Address addr) { super(addr); } public Address top() { return topField.getValue(addr); } /** In bytes */ public long capacity() { return end().minus(bottom()); } /** In bytes */ public long used() { return top().minus(bottom()); } /** In bytes */ public long free() { return end().minus(top()); } /** In a contiguous space we have a more obvious bound on what parts contain objects. */ public MemRegion usedRegion() { return new MemRegion(bottom(), top()); } /** Returns regions of Space where live objects live */ public List/*<MemRegion>*/ getLiveRegions() { List res = new ArrayList(); res.add(new MemRegion(bottom(), top())); return res; } /** Testers */ public boolean contains(Address p) { return (bottom().lessThanOrEqual(p) && top().greaterThan(p)); } public void printOn(PrintStream tty) { tty.print(" [" + bottom() + "," + top() + "," + end() + ")"); super.printOn(tty); } }