Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/runtime/ConcurrentLocksPrinter.java @ 774:f1f3a2719a55
6843580: JavaThread.getStackBase throws sun.jvm.hotspot.WrongTypeException invoked by jstack
Reviewed-by: phh, dice, never, swamyv
author | xlu |
---|---|
date | Fri, 22 May 2009 16:40:38 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 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.io.*; import java.util.*; import sun.jvm.hotspot.memory.*; import sun.jvm.hotspot.oops.*; public class ConcurrentLocksPrinter { private Map locksMap = new HashMap(); // <JavaThread, List<Oop>> public ConcurrentLocksPrinter() { fillLocks(); } public void print(JavaThread jthread, PrintStream tty) { List locks = (List) locksMap.get(jthread); tty.println("Locked ownable synchronizers:"); if (locks == null || locks.isEmpty()) { tty.println(" - None"); } else { for (Iterator itr = locks.iterator(); itr.hasNext();) { Oop oop = (Oop) itr.next(); tty.println(" - <" + oop.getHandle() + ">, (a " + oop.getKlass().getName().asString() + ")"); } } } //-- Internals only below this point private JavaThread getOwnerThread(Oop oop) { Oop threadOop = OopUtilities.abstractOwnableSynchronizerGetOwnerThread(oop); if (threadOop == null) { return null; } else { return OopUtilities.threadOopGetJavaThread(threadOop); } } private void fillLocks() { VM vm = VM.getVM(); SystemDictionary sysDict = vm.getSystemDictionary(); Klass absOwnSyncKlass = sysDict.getAbstractOwnableSynchronizerKlass(); ObjectHeap heap = vm.getObjectHeap(); // may be not loaded at all if (absOwnSyncKlass != null) { heap.iterateObjectsOfKlass(new DefaultHeapVisitor() { public boolean doObj(Oop oop) { JavaThread thread = getOwnerThread(oop); if (thread != null) { List locks = (List) locksMap.get(thread); if (locks == null) { locks = new LinkedList(); locksMap.put(thread, locks); } locks.add(oop); } return false; } }, absOwnSyncKlass, true); } } }