Mercurial > hg > graal-compiler
view test/compiler/membars/DekkerTest.java @ 17015:ffddcdca8e74
mx: support different name for jvm.cfg
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Tue, 02 Sep 2014 14:47:10 +0200 |
parents | fcf521c3fbc6 |
children | a5f0657a1666 |
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/* * Copyright 2013 SAP AG. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /** * @test * @bug 8007898 * @summary Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier(). * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:+StressGCM -XX:+StressLCM DekkerTest * @author Martin Doerr martin DOT doerr AT sap DOT com * * Run 3 times since the failure is intermittent. */ public class DekkerTest { /* Read After Write Test (basically a simple Dekker test with volatile variables) Derived from the original jcstress test, available at: http://hg.openjdk.java.net/code-tools/jcstress/file/6c339a5aa00d/ tests-custom/src/main/java/org/openjdk/jcstress/tests/volatiles/DekkerTest.java */ static final int ITERATIONS = 1000000; static class TestData { public volatile int a; public volatile int b; } static class ResultData { public int a; public int b; } TestData[] testDataArray; ResultData[] results; volatile boolean start; public DekkerTest() { testDataArray = new TestData[ITERATIONS]; results = new ResultData[ITERATIONS]; for (int i = 0; i < ITERATIONS; ++i) { testDataArray[i] = new TestData(); results[i] = new ResultData(); } start = false; } public void reset() { for (int i = 0; i < ITERATIONS; ++i) { testDataArray[i].a = 0; testDataArray[i].b = 0; results[i].a = 0; results[i].b = 0; } start = false; } int actor1(TestData t) { t.a = 1; return t.b; } int actor2(TestData t) { t.b = 1; return t.a; } class Runner1 extends Thread { public void run() { do {} while (!start); for (int i = 0; i < ITERATIONS; ++i) { results[i].a = actor1(testDataArray[i]); } } } class Runner2 extends Thread { public void run() { do {} while (!start); for (int i = 0; i < ITERATIONS; ++i) { results[i].b = actor2(testDataArray[i]); } } } void testRunner() { Thread thread1 = new Runner1(); Thread thread2 = new Runner2(); thread1.start(); thread2.start(); do {} while (!thread1.isAlive()); do {} while (!thread2.isAlive()); start = true; Thread.yield(); try { thread1.join(); thread2.join(); } catch (InterruptedException e) { System.out.println("interrupted!"); System.exit(1); } } boolean printResult() { int[] count = new int[4]; for (int i = 0; i < ITERATIONS; ++i) { int event_kind = (results[i].a << 1) + results[i].b; ++count[event_kind]; } if (count[0] == 0 && count[3] == 0) { System.out.println("[not interesting]"); return false; // not interesting } String error = (count[0] == 0) ? " ok" : " disallowed!"; System.out.println("[0,0] " + count[0] + error); System.out.println("[0,1] " + count[1]); System.out.println("[1,0] " + count[2]); System.out.println("[1,1] " + count[3]); return (count[0] != 0); } public static void main(String args[]) { DekkerTest test = new DekkerTest(); final int runs = 30; int failed = 0; for (int c = 0; c < runs; ++c) { test.testRunner(); if (test.printResult()) { failed++; } test.reset(); } if (failed > 0) { throw new InternalError("FAILED. Got " + failed + " failed ITERATIONS"); } System.out.println("PASSED."); } }