63 lines
2.0 KiB
Java
63 lines
2.0 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8255466
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* @summary unsafe access to static field causes crash
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* @modules java.base/jdk.internal.misc
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*
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* @run main/othervm -Xcomp -XX:CompileCommand=compileonly,TestUnsafeStaticFieldAccess::* TestUnsafeStaticFieldAccess
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*
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*/
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import jdk.internal.misc.Unsafe;
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import java.lang.reflect.Field;
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public class TestUnsafeStaticFieldAccess {
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private static final Unsafe UNSAFE = Unsafe.getUnsafe();
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private static final long offset;
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private static volatile Class<?> clazz;
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private static int field;
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static {
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long o = 0;
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for (Field f : TestUnsafeStaticFieldAccess.class.getDeclaredFields()) {
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if (f.getName().equals("field")) {
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o = UNSAFE.staticFieldOffset(f);
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break;
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}
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}
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offset = o;
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clazz = TestUnsafeStaticFieldAccess.class;
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}
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public static void main(String[] args) {
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for (int i = 0; i < 12000; i++) {
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UNSAFE.getInt(clazz, offset);
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}
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}
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}
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