1 /* 2 * Copyright (c) 2011, 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 * @key stress gc 27 * 28 * @summary converted from VM Testbase gc/hashcode/HashCodeSimpleTest. 29 * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent, jrockit] 30 * VM Testbase readme: 31 * DESCRIPTION 32 * Hash code regressiontests. 33 * 34 * COMMENTS 35 * This test was ported from JRockit test suite. 36 * 37 * @library /vmTestbase 38 * /test/lib 39 * @run driver jdk.test.lib.FileInstaller . . 40 * @run main/othervm -XX:-UseGCOverheadLimit gc.hashcode.HashCodeSimpleTest.HashCodeSimpleTest 41 */ 42 43 package gc.hashcode.HashCodeSimpleTest; 44 45 import nsk.share.TestFailure; 46 import nsk.share.gc.GC; 47 import nsk.share.gc.ThreadedGCTest; 48 49 /** 50 * Hash code regressiontests. 51 */ 52 public class HashCodeSimpleTest extends ThreadedGCTest { 53 54 @Override 55 protected Runnable createRunnable(int i) { 56 57 58 59 /** 60 * Test verifies that VM provided hashcodes are constant over invocations. 61 * @return success if the test passes 62 * failure if some hashvalue has changed 63 */ 64 return new Runnable() { 65 long counter = 0; 66 67 68 @Override 69 public void run() { 70 71 Object object = new Object(); 72 int hashCode0 = object.hashCode(); 73 74 for (int i = 0; i < 100; i++) { 75 int hashCode = object.hashCode(); 76 77 if (hashCode != hashCode0) { 78 throw new TestFailure("Repeated hash code queries broken: " 79 + hashCode0 + "!=" + hashCode); 80 } 81 } 82 if (counter++ % 1000000 == 0) { 83 log.info(counter / 1000000 + " million hashcodes verified"); 84 } 85 86 87 } 88 }; 89 } 90 91 public static void main(String args[]) { 92 GC.runTest(new HashCodeSimpleTest(), args); 93 } 94 }