| /* |
| * Copyright (c) 2001, 2014, 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 ObjectMonitor extends VMObject { |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
| heap = VM.getVM().getObjectHeap(); |
| Type type = db.lookupType("ObjectMonitor"); |
| sun.jvm.hotspot.types.Field f = type.getField("_header"); |
| headerFieldOffset = f.getOffset(); |
| f = type.getField("_object"); |
| objectFieldOffset = f.getOffset(); |
| f = type.getField("_owner"); |
| ownerFieldOffset = f.getOffset(); |
| f = type.getField("FreeNext"); |
| FreeNextFieldOffset = f.getOffset(); |
| countField = type.getJIntField("_count"); |
| waitersField = type.getJIntField("_waiters"); |
| recursionsField = type.getCIntegerField("_recursions"); |
| } |
| |
| public ObjectMonitor(Address addr) { |
| super(addr); |
| } |
| |
| public Mark header() { |
| return new Mark(addr.addOffsetTo(headerFieldOffset)); |
| } |
| |
| // FIXME |
| // void set_header(markOop hdr); |
| |
| // FIXME: must implement and delegate to platform-dependent implementation |
| // public boolean isBusy(); |
| public boolean isEntered(sun.jvm.hotspot.runtime.Thread current) { |
| Address o = owner(); |
| if (current.threadObjectAddress().equals(o) || |
| current.isLockOwned(o)) { |
| return true; |
| } |
| return false; |
| } |
| |
| public Address owner() { return addr.getAddressAt(ownerFieldOffset); } |
| // FIXME |
| // void set_owner(void* owner); |
| |
| public int waiters() { return waitersField.getValue(addr); } |
| |
| public Address freeNext() { return addr.getAddressAt(FreeNextFieldOffset); } |
| // FIXME |
| // void set_queue(void* owner); |
| |
| public int count() { return countField.getValue(addr); } |
| // FIXME |
| // void set_count(int count); |
| |
| public long recursions() { return recursionsField.getValue(addr); } |
| |
| public OopHandle object() { |
| return addr.getOopHandleAt(objectFieldOffset); |
| } |
| |
| // contentions is always equal to count |
| public int contentions() { |
| return count(); |
| } |
| |
| // FIXME |
| // void* object_addr(); |
| // void set_object(void* obj); |
| |
| // The following four either aren't expressed as typed fields in |
| // vmStructs.cpp because they aren't strongly typed in the VM, or |
| // would confuse the SA's type system. |
| private static ObjectHeap heap; |
| private static long headerFieldOffset; |
| private static long objectFieldOffset; |
| private static long ownerFieldOffset; |
| private static long FreeNextFieldOffset; |
| private static JIntField countField; |
| private static JIntField waitersField; |
| private static CIntegerField recursionsField; |
| // FIXME: expose platform-dependent stuff |
| } |