| /* |
| * Copyright (c) 2020, Oracle and/or its affiliates. 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 8255466 |
| * @summary unsafe access to static field causes crash |
| * @modules java.base/jdk.internal.misc |
| * |
| * @run main/othervm -Xcomp -XX:CompileCommand=compileonly,TestUnsafeStaticFieldAccess::* TestUnsafeStaticFieldAccess |
| * |
| */ |
| |
| import jdk.internal.misc.Unsafe; |
| import java.lang.reflect.Field; |
| |
| public class TestUnsafeStaticFieldAccess { |
| private static final Unsafe UNSAFE = Unsafe.getUnsafe(); |
| private static final long offset; |
| private static volatile Class<?> clazz; |
| |
| private static int field; |
| |
| static { |
| long o = 0; |
| for (Field f : TestUnsafeStaticFieldAccess.class.getDeclaredFields()) { |
| if (f.getName().equals("field")) { |
| o = UNSAFE.staticFieldOffset(f); |
| break; |
| } |
| } |
| offset = o; |
| clazz = TestUnsafeStaticFieldAccess.class; |
| } |
| |
| |
| public static void main(String[] args) { |
| for (int i = 0; i < 12000; i++) { |
| UNSAFE.getInt(clazz, offset); |
| } |
| } |
| } |