1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. 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 * @bug 8142386 27 * @summary Unsafe access to an array is wrongly marked as mismatched 28 * @modules java.base/jdk.internal.misc 29 * 30 * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:-TieredCompilation 31 * compiler.intrinsics.unsafe.TestUnsafeMismatchedArrayFieldAccess 32 */ 33 34 package compiler.intrinsics.unsafe; 35 36 import jdk.internal.misc.Unsafe; 37 38 public class TestUnsafeMismatchedArrayFieldAccess { 39 40 private static final Unsafe UNSAFE = Unsafe.getUnsafe(); 41 42 static { 43 try { 44 array_offset = UNSAFE.objectFieldOffset(TestUnsafeMismatchedArrayFieldAccess.class.getDeclaredField("array")); 45 } 46 catch (Exception e) { 47 throw new AssertionError(e); 48 } 49 } 50 51 int[] array; 52 static final long array_offset; 53 54 void m() { 55 UNSAFE.getReference(this, array_offset); 56 } 57 58 static public void main(String[] args) { 59 TestUnsafeMismatchedArrayFieldAccess test = new TestUnsafeMismatchedArrayFieldAccess(); 60 61 for (int i = 0; i < 20000; i++) { 62 test.m(); 63 } 64 } 65 }