J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 5086470 6358247 |
| 27 | * @summary Basic Test for ThreadInfo.getLockedMonitors() |
| 28 | * - a stack frame acquires no monitor |
| 29 | * - a stack frame acquires one or more monitors |
| 30 | * - a stack frame blocks on Object.wait |
| 31 | * and the monitor waiting is not locked. |
| 32 | * LockingThread is the class that creates threads |
| 33 | * and do the checking. |
| 34 | * |
| 35 | * @author Mandy Chung |
| 36 | * |
| 37 | * @build Barrier |
| 38 | * @build LockingThread |
| 39 | * @build ThreadDump |
| 40 | * @run main LockedMonitors |
| 41 | */ |
| 42 | |
| 43 | import java.lang.management.*; |
| 44 | import java.util.*; |
| 45 | |
| 46 | public class LockedMonitors { |
| 47 | public static void main(String[] argv) throws Exception { |
| 48 | ThreadMXBean mbean = ManagementFactory.getThreadMXBean(); |
| 49 | if (!mbean.isObjectMonitorUsageSupported()) { |
| 50 | System.out.println("Monitoring of object monitor usage is not supported"); |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | // Start the thread and print the thread dump |
| 55 | LockingThread.startLockingThreads(); |
| 56 | ThreadDump.threadDump(); |
| 57 | |
| 58 | ThreadInfo[] tinfos; |
| 59 | long[] ids = LockingThread.getThreadIds(); |
| 60 | |
| 61 | // Dump all threads with locked monitors |
| 62 | tinfos = mbean.dumpAllThreads(true, false); |
| 63 | LockingThread.checkLockedMonitors(tinfos); |
| 64 | |
| 65 | // Dump all threads with locked monitors and locked synchronizers |
| 66 | tinfos = mbean.dumpAllThreads(true, true); |
| 67 | LockingThread.checkLockedMonitors(tinfos); |
| 68 | |
| 69 | // Test getThreadInfo with locked monitors |
| 70 | tinfos = mbean.getThreadInfo(ids, true, false); |
| 71 | if (tinfos.length != ids.length) { |
| 72 | throw new RuntimeException("Number of ThreadInfo objects = " + |
| 73 | tinfos.length + " not matched. Expected: " + ids.length); |
| 74 | } |
| 75 | LockingThread.checkLockedMonitors(tinfos); |
| 76 | |
| 77 | // Test getThreadInfo with locked monitors and locked synchronizers |
| 78 | tinfos = mbean.getThreadInfo(ids, true, true); |
| 79 | if (tinfos.length != ids.length) { |
| 80 | throw new RuntimeException("Number of ThreadInfo objects = " + |
| 81 | tinfos.length + " not matched. Expected: " + ids.length); |
| 82 | } |
| 83 | LockingThread.checkLockedMonitors(tinfos); |
| 84 | |
| 85 | System.out.println("Test passed"); |
| 86 | } |
| 87 | } |