| /* |
| * Copyright (c) 2017, 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 8182036 |
| * @summary Load from initializing arraycopy uses wrong memory state |
| * |
| * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+StressGCM -XX:+StressLCM TestInitializingACLoadWithBadMem |
| * |
| */ |
| |
| import java.util.Arrays; |
| |
| public class TestInitializingACLoadWithBadMem { |
| static Object test_dummy; |
| static int test1() { |
| int[] src = new int[10]; |
| test_dummy = src; |
| int[] dst = new int[10]; |
| src[1] = 0x42; |
| // arraycopy generates a load from src/store to dst which must |
| // be after the store to src above. |
| System.arraycopy(src, 1, dst, 1, 9); |
| return dst[1]; |
| } |
| |
| static public void main(String[] args) { |
| int[] src = new int[10]; |
| for (int i = 0; i < 20000; i++) { |
| int res = test1(); |
| if (res != 0x42) { |
| throw new RuntimeException("bad result: " + res + " != " + 0x42); |
| } |
| } |
| } |
| } |