Wed, 22 Jan 2014 12:37:28 -0800
Added tag jdk8u5-b05 for changeset b90de55aca30
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright 2013 SAP AG. 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 | /** |
aoqi@0 | 25 | * @test |
aoqi@0 | 26 | * @bug 8007898 |
aoqi@0 | 27 | * @summary Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier(). |
aoqi@0 | 28 | * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest |
aoqi@0 | 29 | * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest |
aoqi@0 | 30 | * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest |
aoqi@0 | 31 | * @author Martin Doerr martin DOT doerr AT sap DOT com |
aoqi@0 | 32 | * |
aoqi@0 | 33 | * Run 3 times since the failure is intermittent. |
aoqi@0 | 34 | */ |
aoqi@0 | 35 | |
aoqi@0 | 36 | public class DekkerTest { |
aoqi@0 | 37 | |
aoqi@0 | 38 | /* |
aoqi@0 | 39 | Read After Write Test (basically a simple Dekker test with volatile variables) |
aoqi@0 | 40 | Derived from the original jcstress test, available at: |
aoqi@0 | 41 | http://hg.openjdk.java.net/code-tools/jcstress/file/6c339a5aa00d/ |
aoqi@0 | 42 | tests-custom/src/main/java/org/openjdk/jcstress/tests/volatiles/DekkerTest.java |
aoqi@0 | 43 | */ |
aoqi@0 | 44 | |
aoqi@0 | 45 | static final int ITERATIONS = 1000000; |
aoqi@0 | 46 | |
aoqi@0 | 47 | static class TestData { |
aoqi@0 | 48 | public volatile int a; |
aoqi@0 | 49 | public volatile int b; |
aoqi@0 | 50 | } |
aoqi@0 | 51 | |
aoqi@0 | 52 | static class ResultData { |
aoqi@0 | 53 | public int a; |
aoqi@0 | 54 | public int b; |
aoqi@0 | 55 | } |
aoqi@0 | 56 | |
aoqi@0 | 57 | TestData[] testDataArray; |
aoqi@0 | 58 | ResultData[] results; |
aoqi@0 | 59 | |
aoqi@0 | 60 | volatile boolean start; |
aoqi@0 | 61 | |
aoqi@0 | 62 | public DekkerTest() { |
aoqi@0 | 63 | testDataArray = new TestData[ITERATIONS]; |
aoqi@0 | 64 | results = new ResultData[ITERATIONS]; |
aoqi@0 | 65 | for (int i = 0; i < ITERATIONS; ++i) { |
aoqi@0 | 66 | testDataArray[i] = new TestData(); |
aoqi@0 | 67 | results[i] = new ResultData(); |
aoqi@0 | 68 | } |
aoqi@0 | 69 | start = false; |
aoqi@0 | 70 | } |
aoqi@0 | 71 | |
aoqi@0 | 72 | public void reset() { |
aoqi@0 | 73 | for (int i = 0; i < ITERATIONS; ++i) { |
aoqi@0 | 74 | testDataArray[i].a = 0; |
aoqi@0 | 75 | testDataArray[i].b = 0; |
aoqi@0 | 76 | results[i].a = 0; |
aoqi@0 | 77 | results[i].b = 0; |
aoqi@0 | 78 | } |
aoqi@0 | 79 | start = false; |
aoqi@0 | 80 | } |
aoqi@0 | 81 | |
aoqi@0 | 82 | int actor1(TestData t) { |
aoqi@0 | 83 | t.a = 1; |
aoqi@0 | 84 | return t.b; |
aoqi@0 | 85 | } |
aoqi@0 | 86 | |
aoqi@0 | 87 | int actor2(TestData t) { |
aoqi@0 | 88 | t.b = 1; |
aoqi@0 | 89 | return t.a; |
aoqi@0 | 90 | } |
aoqi@0 | 91 | |
aoqi@0 | 92 | class Runner1 extends Thread { |
aoqi@0 | 93 | public void run() { |
aoqi@0 | 94 | do {} while (!start); |
aoqi@0 | 95 | for (int i = 0; i < ITERATIONS; ++i) { |
aoqi@0 | 96 | results[i].a = actor1(testDataArray[i]); |
aoqi@0 | 97 | } |
aoqi@0 | 98 | } |
aoqi@0 | 99 | } |
aoqi@0 | 100 | |
aoqi@0 | 101 | class Runner2 extends Thread { |
aoqi@0 | 102 | public void run() { |
aoqi@0 | 103 | do {} while (!start); |
aoqi@0 | 104 | for (int i = 0; i < ITERATIONS; ++i) { |
aoqi@0 | 105 | results[i].b = actor2(testDataArray[i]); |
aoqi@0 | 106 | } |
aoqi@0 | 107 | } |
aoqi@0 | 108 | } |
aoqi@0 | 109 | |
aoqi@0 | 110 | void testRunner() { |
aoqi@0 | 111 | Thread thread1 = new Runner1(); |
aoqi@0 | 112 | Thread thread2 = new Runner2(); |
aoqi@0 | 113 | thread1.start(); |
aoqi@0 | 114 | thread2.start(); |
aoqi@0 | 115 | do {} while (!thread1.isAlive()); |
aoqi@0 | 116 | do {} while (!thread2.isAlive()); |
aoqi@0 | 117 | start = true; |
aoqi@0 | 118 | Thread.yield(); |
aoqi@0 | 119 | try { |
aoqi@0 | 120 | thread1.join(); |
aoqi@0 | 121 | thread2.join(); |
aoqi@0 | 122 | } catch (InterruptedException e) { |
aoqi@0 | 123 | System.out.println("interrupted!"); |
aoqi@0 | 124 | System.exit(1); |
aoqi@0 | 125 | } |
aoqi@0 | 126 | } |
aoqi@0 | 127 | |
aoqi@0 | 128 | boolean printResult() { |
aoqi@0 | 129 | int[] count = new int[4]; |
aoqi@0 | 130 | for (int i = 0; i < ITERATIONS; ++i) { |
aoqi@0 | 131 | int event_kind = (results[i].a << 1) + results[i].b; |
aoqi@0 | 132 | ++count[event_kind]; |
aoqi@0 | 133 | } |
aoqi@0 | 134 | if (count[0] == 0 && count[3] == 0) { |
aoqi@0 | 135 | System.out.println("[not interesting]"); |
aoqi@0 | 136 | return false; // not interesting |
aoqi@0 | 137 | } |
aoqi@0 | 138 | String error = (count[0] == 0) ? " ok" : " disallowed!"; |
aoqi@0 | 139 | System.out.println("[0,0] " + count[0] + error); |
aoqi@0 | 140 | System.out.println("[0,1] " + count[1]); |
aoqi@0 | 141 | System.out.println("[1,0] " + count[2]); |
aoqi@0 | 142 | System.out.println("[1,1] " + count[3]); |
aoqi@0 | 143 | return (count[0] != 0); |
aoqi@0 | 144 | } |
aoqi@0 | 145 | |
aoqi@0 | 146 | public static void main(String args[]) { |
aoqi@0 | 147 | DekkerTest test = new DekkerTest(); |
aoqi@0 | 148 | final int runs = 30; |
aoqi@0 | 149 | int failed = 0; |
aoqi@0 | 150 | for (int c = 0; c < runs; ++c) { |
aoqi@0 | 151 | test.testRunner(); |
aoqi@0 | 152 | if (test.printResult()) { |
aoqi@0 | 153 | failed++; |
aoqi@0 | 154 | } |
aoqi@0 | 155 | test.reset(); |
aoqi@0 | 156 | } |
aoqi@0 | 157 | if (failed > 0) { |
aoqi@0 | 158 | throw new InternalError("FAILED. Got " + failed + " failed ITERATIONS"); |
aoqi@0 | 159 | } |
aoqi@0 | 160 | System.out.println("PASSED."); |
aoqi@0 | 161 | } |
aoqi@0 | 162 | |
aoqi@0 | 163 | } |