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Java example source code file (VirtualSpace.java)
The VirtualSpace.java Java example source code/* * Copyright (c) 2000, 2002, 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.runtime; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; public class VirtualSpace extends VMObject { private static AddressField lowField; private static AddressField highField; private static AddressField lowBoundaryField; private static AddressField highBoundaryField; 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("VirtualSpace"); lowField = type.getAddressField("_low"); highField = type.getAddressField("_high"); lowBoundaryField = type.getAddressField("_low_boundary"); highBoundaryField = type.getAddressField("_high_boundary"); } public VirtualSpace(Address addr) { super(addr); } public Address low() { return lowField.getValue(addr); } public Address high() { return highField.getValue(addr); } public Address lowBoundary() { return lowBoundaryField.getValue(addr); } public Address highBoundary() { return highBoundaryField.getValue(addr); } /** Testers (all sizes are byte sizes) */ public long committedSize() { return high().minus(low()); } public long reservedSize() { return highBoundary().minus(lowBoundary()); } public long uncommittedSize() { return reservedSize() - committedSize(); } public boolean contains(Address addr) { return (low().lessThanOrEqual(addr) && addr.lessThan(high())); } } Other Java examples (source code examples)Here is a short list of links related to this Java VirtualSpace.java source code file: |
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