Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/runtime/PerfMemory.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/PerfMemory.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,109 @@ +/* + * Copyright 2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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; + } + } +}