| /* |
| * Copyright (c) 2015, 2016, 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 8136473 |
| * @summary Mismatched stores on same slice possible with Unsafe.Put*Unaligned methods |
| * @modules java.base/jdk.internal.misc:+open |
| * |
| * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation |
| * compiler.intrinsics.unsafe.TestUnsafeUnalignedMismatchedAccesses |
| * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation |
| * -XX:+UnlockDiagnosticVMOptions -XX:-UseUnalignedAccesses |
| * compiler.intrinsics.unsafe.TestUnsafeUnalignedMismatchedAccesses |
| */ |
| |
| package compiler.intrinsics.unsafe; |
| |
| import jdk.internal.misc.Unsafe; |
| |
| import java.lang.reflect.Field; |
| |
| public class TestUnsafeUnalignedMismatchedAccesses { |
| |
| private static final Unsafe UNSAFE; |
| |
| static { |
| try { |
| Field unsafeField = Unsafe.class.getDeclaredField("theUnsafe"); |
| unsafeField.setAccessible(true); |
| UNSAFE = (Unsafe) unsafeField.get(null); |
| } |
| catch (Exception e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| static void test1(byte[] array) { |
| array[0] = 0; |
| UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET, 0); |
| array[0] = 0; |
| } |
| |
| static void test2(byte[] array) { |
| array[0] = 0; |
| UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+1, 0); |
| array[0] = 0; |
| } |
| |
| static void test3(byte[] array) { |
| array[0] = 0; |
| UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+2, 0); |
| array[0] = 0; |
| } |
| |
| static void test4(byte[] array) { |
| array[0] = 0; |
| UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+3, 0); |
| array[0] = 0; |
| } |
| |
| static void test5(byte[] array) { |
| array[0] = 0; |
| UNSAFE.putInt(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET, 0); |
| array[0] = 0; |
| } |
| |
| // unaligned access and non escaping allocation |
| static void test6() { |
| byte[] array = new byte[10]; |
| UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+1, -1); |
| array[0] = 0; |
| } |
| |
| // unaligned access and non escaping allocation |
| static int test7() { |
| byte[] array = new byte[10]; |
| UNSAFE.putIntUnaligned(array, UNSAFE.ARRAY_BYTE_BASE_OFFSET+1, -1); |
| array[0] = 0; |
| array[2] = 0; |
| return array[0] + array[1] + array[2] + array[3] + array[4]; |
| } |
| |
| // unaligned access with vectorization |
| static void test8(int[] src1, int[] src2, int[] dst) { |
| for (int i = 0; i < dst.length-1; i++) { |
| int res = src1[i] + src2[i]; |
| UNSAFE.putIntUnaligned(dst, UNSAFE.ARRAY_INT_BASE_OFFSET + i*4+1, res); |
| } |
| } |
| |
| static public void main(String[] args) throws Exception { |
| byte[] byte_array = new byte[100]; |
| int[] int_array = new int[100]; |
| Object[] obj_array = new Object[100]; |
| TestUnsafeUnalignedMismatchedAccesses test = new TestUnsafeUnalignedMismatchedAccesses(); |
| for (int i = 0; i < 20000; i++) { |
| test1(byte_array); |
| test2(byte_array); |
| test3(byte_array); |
| test4(byte_array); |
| test5(byte_array); |
| test6(); |
| test7(); |
| test8(int_array, int_array, int_array); |
| } |
| } |
| } |