1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 /** 26 * @test 27 * @bug 8185164 28 * @summary Verifies the JVMTI GetOwnedMonitorInfo API does not show up any monitor at MonitorContendedEnter JVMTI event. 29 * @modules jdk.jdi 30 * @compile GetOwnedMonitorInfoTest.java 31 * @run main/othervm/native -agentlib:GetOwnedMonitorInfoTest GetOwnedMonitorInfoTest 32 */ 33 34 import java.io.PrintStream; 35 36 public class GetOwnedMonitorInfoTest { 37 38 static { 39 try { 40 System.loadLibrary("GetOwnedMonitorInfoTest"); 41 } catch (UnsatisfiedLinkError ule) { 42 System.err.println("Could not load GetOwnedMonitorInfoTest library"); 43 System.err.println("java.library.path: " 44 + System.getProperty("java.library.path")); 45 throw ule; 46 } 47 } 48 49 private static native int check(); 50 private static native boolean hasEventPosted(); 51 52 public static void main(String[] args) throws Exception { 53 final GetOwnedMonitorInfoTest lock = new GetOwnedMonitorInfoTest(); 54 55 Thread t1 = new Thread(() -> { 56 synchronized (lock) { 57 System.out.println("Thread in sync section: " 58 + Thread.currentThread().getName()); 59 } 60 }); 61 62 // Make sure t1 contends on the monitor. 63 synchronized (lock) { 64 System.out.println("Main starting worker thread."); 65 t1.start(); 66 67 // Wait for the MonitorContendedEnter event 68 while (!hasEventPosted()) { 69 System.out.println("Main waiting for event."); 70 Thread.sleep(100); 71 } 72 } 73 74 t1.join(); 75 76 if (check() != 0) { 77 throw new RuntimeException("FAILED status returned from the agent"); 78 } 79 } 80 }