| /* |
| * Copyright (c) 2014, 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 8058744 |
| * @summary Invalid pattern-matching of address computations in raw unsafe |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @run main/othervm -Xbatch compiler.unsafe.UnsafeRaw |
| */ |
| |
| package compiler.unsafe; |
| |
| import jdk.internal.misc.Unsafe; |
| import jdk.test.lib.Utils; |
| |
| import java.util.Random; |
| |
| public class UnsafeRaw { |
| public static class Tests { |
| public static int int_index(Unsafe unsafe, long base, int index) throws Exception { |
| return unsafe.getInt(base + (index << 2)); |
| } |
| public static int long_index(Unsafe unsafe, long base, long index) throws Exception { |
| return unsafe.getInt(base + (index << 2)); |
| } |
| public static int int_index_back_ashift(Unsafe unsafe, long base, int index) throws Exception { |
| return unsafe.getInt(base + (index >> 2)); |
| } |
| public static int int_index_back_lshift(Unsafe unsafe, long base, int index) throws Exception { |
| return unsafe.getInt(base + (index >>> 2)); |
| } |
| public static int long_index_back_ashift(Unsafe unsafe, long base, long index) throws Exception { |
| return unsafe.getInt(base + (index >> 2)); |
| } |
| public static int long_index_back_lshift(Unsafe unsafe, long base, long index) throws Exception { |
| return unsafe.getInt(base + (index >>> 2)); |
| } |
| public static int int_const_12345678_index(Unsafe unsafe, long base) throws Exception { |
| int idx4 = 0x12345678; |
| return unsafe.getInt(base + idx4); |
| } |
| public static int long_const_1234567890abcdef_index(Unsafe unsafe, long base) throws Exception { |
| long idx5 = 0x1234567890abcdefL; |
| return unsafe.getInt(base + idx5); |
| } |
| public static int int_index_mul(Unsafe unsafe, long base, int index) throws Exception { |
| return unsafe.getInt(base + (index * 4)); |
| } |
| public static int long_index_mul(Unsafe unsafe, long base, long index) throws Exception { |
| return unsafe.getInt(base + (index * 4)); |
| } |
| public static int int_index_mul_scale_16(Unsafe unsafe, long base, int index) throws Exception { |
| return unsafe.getInt(base + (index * 16)); |
| } |
| public static int long_index_mul_scale_16(Unsafe unsafe, long base, long index) throws Exception { |
| return unsafe.getInt(base + (index * 16)); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| Unsafe unsafe = Unsafe.getUnsafe(); |
| final int array_size = 128; |
| final int element_size = 4; |
| final int magic = 0x12345678; |
| |
| Random rnd = Utils.getRandomInstance(); |
| |
| long array = unsafe.allocateMemory(array_size * element_size); // 128 ints |
| long addr = array + array_size * element_size / 2; // something in the middle to work with |
| unsafe.putInt(addr, magic); |
| for (int j = 0; j < 100000; j++) { |
| if (Tests.int_index(unsafe, addr, 0) != magic) throw new Exception(); |
| if (Tests.long_index(unsafe, addr, 0) != magic) throw new Exception(); |
| if (Tests.int_index_mul(unsafe, addr, 0) != magic) throw new Exception(); |
| if (Tests.long_index_mul(unsafe, addr, 0) != magic) throw new Exception(); |
| { |
| long idx1 = rnd.nextLong(); |
| long addr1 = addr - (idx1 << 2); |
| if (Tests.long_index(unsafe, addr1, idx1) != magic) throw new Exception(); |
| } |
| { |
| long idx2 = rnd.nextLong(); |
| long addr2 = addr - (idx2 >> 2); |
| if (Tests.long_index_back_ashift(unsafe, addr2, idx2) != magic) throw new Exception(); |
| } |
| { |
| long idx3 = rnd.nextLong(); |
| long addr3 = addr - (idx3 >>> 2); |
| if (Tests.long_index_back_lshift(unsafe, addr3, idx3) != magic) throw new Exception(); |
| } |
| { |
| long idx4 = 0x12345678; |
| long addr4 = addr - idx4; |
| if (Tests.int_const_12345678_index(unsafe, addr4) != magic) throw new Exception(); |
| } |
| { |
| long idx5 = 0x1234567890abcdefL; |
| long addr5 = addr - idx5; |
| if (Tests.long_const_1234567890abcdef_index(unsafe, addr5) != magic) throw new Exception(); |
| } |
| { |
| int idx6 = rnd.nextInt(); |
| long addr6 = addr - (idx6 >> 2); |
| if (Tests.int_index_back_ashift(unsafe, addr6, idx6) != magic) throw new Exception(); |
| } |
| { |
| int idx7 = rnd.nextInt(); |
| long addr7 = addr - (idx7 >>> 2); |
| if (Tests.int_index_back_lshift(unsafe, addr7, idx7) != magic) throw new Exception(); |
| } |
| { |
| int idx8 = rnd.nextInt(); |
| long addr8 = addr - (idx8 * 16); |
| if (Tests.int_index_mul_scale_16(unsafe, addr8, idx8) != magic) throw new Exception(); |
| } |
| { |
| long idx9 = rnd.nextLong(); |
| long addr9 = addr - (idx9 * 16); |
| if (Tests.long_index_mul_scale_16(unsafe, addr9, idx9) != magic) throw new Exception(); |
| } |
| } |
| } |
| } |