Mercurial > hg > graal-jvmci-8
diff agent/src/share/classes/sun/jvm/hotspot/runtime/ObjectMonitor.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
---|---|
date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/ObjectMonitor.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,130 @@ +/* + * Copyright 2001-2005 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 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.getCIntegerField("_count"); + waitersField = type.getCIntegerField("_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 long waiters() { return waitersField.getValue(addr); } + + public Address freeNext() { return addr.getAddressAt(FreeNextFieldOffset); } + // FIXME + // void set_queue(void* owner); + + public long count() { return countField.getValue(addr); } + // FIXME + // void set_count(intptr_t count); + + public long recursions() { return recursionsField.getValue(addr); } + + public OopHandle object() { + return addr.getOopHandleAt(objectFieldOffset); + } + + public long contentions() { + // refer to objectMonitor_xxx.inline.hpp - contentions definition. + // for Solaris and Linux, contentions is same as count. for Windows + // it is different (objectMonitor_win32.inline.hpp) + long count = count(); + if (VM.getVM().getOS().equals("win32")) { + // don't count the owner of the monitor + return count > 0? count - 1 : 0; + } else { + // Solaris and Linux + 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 CIntegerField countField; + private static CIntegerField waitersField; + private static CIntegerField recursionsField; + // FIXME: expose platform-dependent stuff +}