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