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annotate test/compiler/7190310/Test7190310.java @ 7606:bf623b2d5508

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8006204: please JTREGify test/compiler/7190310/Test7190310.java Summary: Add proper jtreg annotations in the preceding comment, including an explicit timeout. Reviewed-by: kvn, twisti Contributed-by: david.r.chase@oracle.com
author kvn
date Wed, 16 Jan 2013 14:55:18 -0800
parents 09aad8452938
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 /*
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26 * @test
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27 * @bug 7190310
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28 * @summary Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops
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29 * @run main/othervm/timeout=600 -Xbatch Test7190310
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30 */
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31
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32 /*
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33 * Note bug exhibits as infinite loop, timeout is helpful.
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34 * It should normally finish pretty quickly, but on some especially slow machines
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35 * it may not. The companion _unsafe test lacks a timeout, but that is okay.
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36 */
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37
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38 import java.lang.ref.*;
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39
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40 public class Test7190310 {
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41 private static Object str = new Object() {
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42 public String toString() {
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43 return "The Object";
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44 }
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45
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46 protected void finalize() throws Throwable {
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47 System.out.println("The Object is being finalized");
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48 super.finalize();
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49 }
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50 };
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51 private final static ReferenceQueue<Object> rq =
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52 new ReferenceQueue<Object>();
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53 private final static WeakReference<Object> wr =
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54 new WeakReference<Object>(str, rq);
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55
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56 public static void main(String[] args)
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57 throws InterruptedException {
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58 Thread reader = new Thread() {
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59 public void run() {
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60 while (wr.get() != null) {
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61 }
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62 System.out.println("wr.get() returned null");
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63 }
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64 };
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65
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66 Thread queueReader = new Thread() {
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67 public void run() {
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68 try {
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69 Reference<? extends Object> ref = rq.remove();
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70 System.out.println(ref);
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71 System.out.println("queueReader returned, ref==wr is "
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72 + (ref == wr));
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73 } catch (InterruptedException e) {
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74 System.err.println("Sleep interrupted - exiting");
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75 }
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76 }
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77 };
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78
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79 reader.start();
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80 queueReader.start();
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81
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82 Thread.sleep(1000);
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83 str = null;
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84 System.gc();
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85 }
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86 }
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87