Mercurial > jdk8-mips64-public > hotspot / annotate
test/serviceability/threads/TestFalseDeadLock.java@dbb05f6d93c4 (annotated)
test/serviceability/threads/TestFalseDeadLock.java
Mon, 28 Jul 2014 15:06:38 -0700
- author
- fzhinkin
- date
- Mon, 28 Jul 2014 15:06:38 -0700
- changeset 6997
- dbb05f6d93c4
- parent 0
- f90c822e73f8
- permissions
- -rw-r--r--
8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | */ |
| aoqi@0 | 23 | |
| aoqi@0 | 24 | import java.lang.management.ManagementFactory; |
| aoqi@0 | 25 | import java.lang.management.ThreadMXBean; |
| aoqi@0 | 26 | import java.util.Random; |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | /* |
| aoqi@0 | 29 | * @test |
| aoqi@0 | 30 | * @bug 8016304 |
| aoqi@0 | 31 | * @summary Make sure no deadlock is reported for this program which has no deadlocks. |
| aoqi@0 | 32 | * @run main/othervm TestFalseDeadLock |
| aoqi@0 | 33 | */ |
| aoqi@0 | 34 | |
| aoqi@0 | 35 | /* |
| aoqi@0 | 36 | * This test will not provoke the bug every time it is run since the bug is intermittent. |
| aoqi@0 | 37 | * The test has a fixed running time of 5 seconds. |
| aoqi@0 | 38 | */ |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | public class TestFalseDeadLock { |
| aoqi@0 | 41 | private static ThreadMXBean bean; |
| aoqi@0 | 42 | private static volatile boolean running = true; |
| aoqi@0 | 43 | private static volatile boolean found = false; |
| aoqi@0 | 44 | |
| aoqi@0 | 45 | public static void main(String[] args) throws Exception { |
| aoqi@0 | 46 | bean = ManagementFactory.getThreadMXBean(); |
| aoqi@0 | 47 | Thread[] threads = new Thread[500]; |
| aoqi@0 | 48 | for (int i = 0; i < threads.length; i++) { |
| aoqi@0 | 49 | Test t = new Test(); |
| aoqi@0 | 50 | threads[i] = new Thread(t); |
| aoqi@0 | 51 | threads[i].start(); |
| aoqi@0 | 52 | } |
| aoqi@0 | 53 | try { |
| aoqi@0 | 54 | Thread.sleep(5000); |
| aoqi@0 | 55 | } catch (InterruptedException ex) { |
| aoqi@0 | 56 | } |
| aoqi@0 | 57 | running = false; |
| aoqi@0 | 58 | for (Thread t : threads) { |
| aoqi@0 | 59 | t.join(); |
| aoqi@0 | 60 | } |
| aoqi@0 | 61 | if (found) { |
| aoqi@0 | 62 | throw new Exception("Deadlock reported, but there is no deadlock."); |
| aoqi@0 | 63 | } |
| aoqi@0 | 64 | } |
| aoqi@0 | 65 | |
| aoqi@0 | 66 | public static class Test implements Runnable { |
| aoqi@0 | 67 | public void run() { |
| aoqi@0 | 68 | Random r = new Random(); |
| aoqi@0 | 69 | while (running) { |
| aoqi@0 | 70 | try { |
| aoqi@0 | 71 | synchronized (this) { |
| aoqi@0 | 72 | wait(r.nextInt(1000) + 1); |
| aoqi@0 | 73 | } |
| aoqi@0 | 74 | } catch (InterruptedException ex) { |
| aoqi@0 | 75 | } |
| aoqi@0 | 76 | recurse(2000); |
| aoqi@0 | 77 | } |
| aoqi@0 | 78 | if (bean.findDeadlockedThreads() != null) { |
| aoqi@0 | 79 | System.out.println("FOUND!"); |
| aoqi@0 | 80 | found = true; |
| aoqi@0 | 81 | } |
| aoqi@0 | 82 | } |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | private void recurse(int i) { |
| aoqi@0 | 85 | if (!running) { |
| aoqi@0 | 86 | // It is important for the test to call println here |
| aoqi@0 | 87 | // since there are locks inside that path. |
| aoqi@0 | 88 | System.out.println("Hullo"); |
| aoqi@0 | 89 | } |
| aoqi@0 | 90 | else if (i > 0) { |
| aoqi@0 | 91 | recurse(i - 1); |
| aoqi@0 | 92 | } |
| aoqi@0 | 93 | } |
| aoqi@0 | 94 | } |
| aoqi@0 | 95 | } |
