| /* |
| * Copyright (c) 2020, Red Hat, Inc. 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 8237837 8244721 |
| * @summary Shenandoah: assert(mem == __null) failed: only one safepoint |
| * @key gc |
| * @requires vm.flavor == "server" |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * |
| * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xcomp -XX:CompileOnly=BarrierInInfiniteLoop::test1 |
| * -XX:CompileOnly=BarrierInInfiniteLoop::test2 -XX:CompileOnly=BarrierInInfiniteLoop::test3 -XX:CompileCommand=quiet BarrierInInfiniteLoop |
| * |
| */ |
| |
| public class BarrierInInfiniteLoop { |
| private static Object field1 = new Object(); |
| private static Object field2 = new Object(); |
| private static int field3; |
| |
| public static void main(String[] args) { |
| test1(false); |
| test2(false, false); |
| test3(false); |
| } |
| |
| private static void test1(boolean flag) { |
| if (flag) { |
| for (;;) { |
| field1 = field2; |
| } |
| } |
| } |
| |
| private static void test2(boolean flag1, boolean flag2) { |
| if (flag1) { |
| for (;;) { |
| for (;;) { |
| if (flag2) { |
| break; |
| } |
| field1 = field2; |
| } |
| } |
| } |
| } |
| |
| private static void test3(boolean flag) { |
| if (flag) { |
| for (;;) { |
| for (;;) { |
| field3 = 42; |
| if (field1 == field2) { |
| break; |
| } |
| } |
| } |
| } |
| } |
| } |