1 /* 2 * Copyright (c) 2005, 2018, 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 * @test 26 * @bug 6224859 27 * @summary JDWP: Mixing application suspends and debugger suspends can cause hangs 28 * @comment converted from test/jdk/com/sun/jdi/MixedSuspendTest.sh 29 * 30 * @library /test/lib 31 * @run main/othervm MixedSuspendTest 32 */ 33 34 import lib.jdb.JdbCommand; 35 import lib.jdb.JdbTest; 36 37 class MixedSuspendTarg extends Thread { 38 39 static volatile boolean started = true; 40 static String lock = "startLock"; 41 main(String[] args)42 public static void main(String[] args){ 43 System.out.println("Howdy from MixedSuspendTarg"); 44 45 MixedSuspendTarg mytarg = new MixedSuspendTarg(); 46 47 synchronized(lock) { 48 mytarg.start(); 49 try { 50 lock.wait(); 51 } catch(InterruptedException ee) { 52 } 53 } 54 mytarg.suspend(); 55 bkpt(); 56 System.out.println("Debuggee: resuming thread"); 57 58 // If the bug occurs, this resume hangs in the back-end 59 mytarg.resume(); 60 System.out.println("Debuggee: resumed thread"); 61 synchronized(lock) { 62 started = false; 63 } 64 System.out.println("Debuggee: exitting, started = " + started); 65 } 66 run()67 public void run() { 68 synchronized(lock) { 69 lock.notifyAll(); 70 } 71 while (true) { 72 synchronized(lock) { 73 if (!started) { 74 break; 75 } 76 int i = 0; 77 } 78 } 79 80 System.out.println("Debuggee: end of thread"); 81 } 82 bkpt()83 static void bkpt() { 84 //System.out.println("bkpt reached, thread = " + this.getName()); 85 int i = 0; // @1 breakpoint 86 } 87 } 88 89 public class MixedSuspendTest extends JdbTest { main(String argv[])90 public static void main(String argv[]) { 91 new MixedSuspendTest().run(); 92 } 93 MixedSuspendTest()94 private MixedSuspendTest() { 95 super(DEBUGGEE_CLASS); 96 } 97 98 private static final String DEBUGGEE_CLASS = MixedSuspendTarg.class.getName(); 99 100 @Override runCases()101 protected void runCases() { 102 setBreakpointsFromTestSource("MixedSuspendTest.java", 1); 103 jdb.command(JdbCommand.run()); 104 jdb.command(JdbCommand.cont().allowExit()); 105 106 // This test fails by timing out. 107 } 108 } 109