1 /*
   2  * Copyright (c) 2008, 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 4446672
  27  *
  28  * @summary converted from VM Testbase jit/regression/b4446672.
  29  * VM Testbase keywords: [jit, quick]
  30  *
  31  * @library /vmTestbase
  32  *          /test/lib
  33  * @run driver jdk.test.lib.FileInstaller . .
  34  * @run main/othervm jit.regression.b4446672.b4446672
  35  */
  36 
  37 package jit.regression.b4446672;
  38 
  39 import nsk.share.TestFailure;
  40 
  41 public class b4446672 {
  42 
  43   public static void main(String[] args) {
  44     new b4446672().run();
  45   }
  46 
  47   private void run() {
  48     new GCThread().start();
  49     new TestThreadStarter().start();
  50 
  51     while (!gcing) Thread.yield();
  52     while (!starting) Thread.yield();
  53       done = true;
  54     while (!testing) Thread.yield();
  55   }
  56 
  57   class TestThread extends Thread {
  58     public void run() {
  59       System.out.println ("TestThread.");
  60       testing = true;
  61     }
  62   }
  63 
  64   class TestThreadStarter extends Thread {
  65     public void run() {
  66       System.out.println ("TestThreadStarter.");
  67       starting=true;
  68       testThread.start();
  69     }
  70   }
  71 
  72   class GCThread extends Thread {
  73     public void run() {
  74       System.out.println ("GCThread run.");
  75       synchronized (testThread) {
  76         System.out.println ("GCThread synchronized.");
  77               while (!done) {
  78                 gcing=true;
  79                 yield();
  80                 System.gc();
  81               }
  82             }
  83         System.out.println ("GCThread done.");
  84     }
  85   }
  86 
  87   TestThread testThread = new TestThread();
  88   boolean done = false;
  89   boolean gcing = false;
  90   boolean testing = false;
  91   boolean starting = false;
  92 }