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view agent/src/share/classes/sun/jvm/hotspot/runtime/ObjectMonitor.java @ 12704:0e998f0daddf
Code cache: make sure we collect statistics even if the compiler is not recognized
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 07 Nov 2013 11:17:23 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2001, 2005, 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.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 }