Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/runtime/ConcurrentLocksPrinter.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/ConcurrentLocksPrinter.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,87 @@ +/* + * 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); + } + } +}