1 /* 2 * Copyright (c) 2018, Red Hat, Inc. 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 * @summary Test GC state load commoning works 27 * @requires vm.flavor == "server" 28 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:-TieredCompilation -XX:+UseShenandoahGC 29 * -XX:+UnlockExperimentalVMOptions -XX:-ShenandoahCommonGCStateLoads 30 * TestExpandedWBLostNullCheckDep 31 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:-TieredCompilation -XX:+UseShenandoahGC 32 * -XX:+UnlockExperimentalVMOptions -XX:+ShenandoahCommonGCStateLoads 33 * TestExpandedWBLostNullCheckDep 34 */ 35 36 public class TestCommonGCLoads { 37 38 Object d = new Object(); 39 40 Target t1 = new Target(); 41 Target t2 = new Target(); 42 Target t3 = new Target(); 43 Target t4 = new Target(); 44 Target t5 = new Target(); 45 46 static void test() { 47 t1.field = d; 48 t2.field = d; 49 t3.field = d; 50 t4.field = d; 51 t5.field = d; 52 } 53 54 static public void main(String[] args) { 55 for (int i = 0; i < 100_000; i++) { 56 test(); 57 } 58 } 59 }