| /* |
| * Copyright (c) 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.runtime; |
| |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.types.*; |
| |
| public class PerfMemory { |
| private static AddressField startField; |
| private static AddressField endField; |
| private static AddressField topField; |
| private static CIntegerField capacityField; |
| private static AddressField prologueField; |
| private static JIntField initializedField; |
| |
| 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("PerfMemory"); |
| startField = type.getAddressField("_start"); |
| endField = type.getAddressField("_end"); |
| topField = type.getAddressField("_top"); |
| capacityField = type.getCIntegerField("_capacity"); |
| prologueField = type.getAddressField("_prologue"); |
| initializedField = type.getJIntField("_initialized"); |
| } |
| |
| // Accessors |
| public static Address start() { |
| return startField.getValue(); |
| } |
| |
| public static Address end() { |
| return endField.getValue(); |
| } |
| |
| public static Address top() { |
| return topField.getValue(); |
| } |
| |
| public static long capacity() { |
| return capacityField.getValue(); |
| } |
| |
| public static boolean initialized() { |
| return ((int) initializedField.getValue()) != 0; |
| } |
| |
| public static PerfDataPrologue prologue() { |
| return (PerfDataPrologue) VMObjectFactory.newObject( |
| PerfDataPrologue.class, prologueField.getValue()); |
| } |
| |
| public static boolean contains(Address addr) { |
| return start() != null && |
| addr.minus(start()) >= 0 && |
| end().minus(addr) > 0; |
| } |
| |
| // an interface supplied to iterate PerfDataEntries |
| public static interface PerfDataEntryVisitor { |
| // returns false to stop the iteration |
| public boolean visit(PerfDataEntry pde); |
| } |
| |
| public static void iterate(PerfDataEntryVisitor visitor) { |
| PerfDataPrologue header = prologue(); |
| int off = header.entryOffset(); |
| int num = header.numEntries(); |
| Address addr = header.getAddress(); |
| |
| for (int i = 0; i < num; i++) { |
| PerfDataEntry pde = (PerfDataEntry) VMObjectFactory.newObject( |
| PerfDataEntry.class, addr.addOffsetTo(off)); |
| off += pde.entryLength(); |
| if (visitor.visit(pde) == false) return; |
| } |
| } |
| } |