1 /* 2 * Copyright (c) 2014, 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 8058744 27 * @summary Invalid pattern-matching of address computations in raw unsafe 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @run main/othervm -Xbatch compiler.unsafe.UnsafeRaw 32 */ 33 34 package compiler.unsafe; 35 36 import jdk.internal.misc.Unsafe; 37 import jdk.test.lib.Utils; 38 39 import java.util.Random; 40 41 public class UnsafeRaw { 42 public static class Tests { int_index(Unsafe unsafe, long base, int index)43 public static int int_index(Unsafe unsafe, long base, int index) throws Exception { 44 return unsafe.getInt(base + (index << 2)); 45 } long_index(Unsafe unsafe, long base, long index)46 public static int long_index(Unsafe unsafe, long base, long index) throws Exception { 47 return unsafe.getInt(base + (index << 2)); 48 } int_index_back_ashift(Unsafe unsafe, long base, int index)49 public static int int_index_back_ashift(Unsafe unsafe, long base, int index) throws Exception { 50 return unsafe.getInt(base + (index >> 2)); 51 } int_index_back_lshift(Unsafe unsafe, long base, int index)52 public static int int_index_back_lshift(Unsafe unsafe, long base, int index) throws Exception { 53 return unsafe.getInt(base + (index >>> 2)); 54 } long_index_back_ashift(Unsafe unsafe, long base, long index)55 public static int long_index_back_ashift(Unsafe unsafe, long base, long index) throws Exception { 56 return unsafe.getInt(base + (index >> 2)); 57 } long_index_back_lshift(Unsafe unsafe, long base, long index)58 public static int long_index_back_lshift(Unsafe unsafe, long base, long index) throws Exception { 59 return unsafe.getInt(base + (index >>> 2)); 60 } int_const_12345678_index(Unsafe unsafe, long base)61 public static int int_const_12345678_index(Unsafe unsafe, long base) throws Exception { 62 int idx4 = 0x12345678; 63 return unsafe.getInt(base + idx4); 64 } long_const_1234567890abcdef_index(Unsafe unsafe, long base)65 public static int long_const_1234567890abcdef_index(Unsafe unsafe, long base) throws Exception { 66 long idx5 = 0x1234567890abcdefL; 67 return unsafe.getInt(base + idx5); 68 } int_index_mul(Unsafe unsafe, long base, int index)69 public static int int_index_mul(Unsafe unsafe, long base, int index) throws Exception { 70 return unsafe.getInt(base + (index * 4)); 71 } long_index_mul(Unsafe unsafe, long base, long index)72 public static int long_index_mul(Unsafe unsafe, long base, long index) throws Exception { 73 return unsafe.getInt(base + (index * 4)); 74 } int_index_mul_scale_16(Unsafe unsafe, long base, int index)75 public static int int_index_mul_scale_16(Unsafe unsafe, long base, int index) throws Exception { 76 return unsafe.getInt(base + (index * 16)); 77 } long_index_mul_scale_16(Unsafe unsafe, long base, long index)78 public static int long_index_mul_scale_16(Unsafe unsafe, long base, long index) throws Exception { 79 return unsafe.getInt(base + (index * 16)); 80 } 81 } 82 main(String[] args)83 public static void main(String[] args) throws Exception { 84 Unsafe unsafe = Unsafe.getUnsafe(); 85 final int array_size = 128; 86 final int element_size = 4; 87 final int magic = 0x12345678; 88 89 Random rnd = Utils.getRandomInstance(); 90 91 long array = unsafe.allocateMemory(array_size * element_size); // 128 ints 92 long addr = array + array_size * element_size / 2; // something in the middle to work with 93 unsafe.putInt(addr, magic); 94 for (int j = 0; j < 100000; j++) { 95 if (Tests.int_index(unsafe, addr, 0) != magic) throw new Exception(); 96 if (Tests.long_index(unsafe, addr, 0) != magic) throw new Exception(); 97 if (Tests.int_index_mul(unsafe, addr, 0) != magic) throw new Exception(); 98 if (Tests.long_index_mul(unsafe, addr, 0) != magic) throw new Exception(); 99 { 100 long idx1 = rnd.nextLong(); 101 long addr1 = addr - (idx1 << 2); 102 if (Tests.long_index(unsafe, addr1, idx1) != magic) throw new Exception(); 103 } 104 { 105 long idx2 = rnd.nextLong(); 106 long addr2 = addr - (idx2 >> 2); 107 if (Tests.long_index_back_ashift(unsafe, addr2, idx2) != magic) throw new Exception(); 108 } 109 { 110 long idx3 = rnd.nextLong(); 111 long addr3 = addr - (idx3 >>> 2); 112 if (Tests.long_index_back_lshift(unsafe, addr3, idx3) != magic) throw new Exception(); 113 } 114 { 115 long idx4 = 0x12345678; 116 long addr4 = addr - idx4; 117 if (Tests.int_const_12345678_index(unsafe, addr4) != magic) throw new Exception(); 118 } 119 { 120 long idx5 = 0x1234567890abcdefL; 121 long addr5 = addr - idx5; 122 if (Tests.long_const_1234567890abcdef_index(unsafe, addr5) != magic) throw new Exception(); 123 } 124 { 125 int idx6 = rnd.nextInt(); 126 long addr6 = addr - (idx6 >> 2); 127 if (Tests.int_index_back_ashift(unsafe, addr6, idx6) != magic) throw new Exception(); 128 } 129 { 130 int idx7 = rnd.nextInt(); 131 long addr7 = addr - (idx7 >>> 2); 132 if (Tests.int_index_back_lshift(unsafe, addr7, idx7) != magic) throw new Exception(); 133 } 134 { 135 int idx8 = rnd.nextInt(); 136 long addr8 = addr - (idx8 * 16); 137 if (Tests.int_index_mul_scale_16(unsafe, addr8, idx8) != magic) throw new Exception(); 138 } 139 { 140 long idx9 = rnd.nextLong(); 141 long addr9 = addr - (idx9 * 16); 142 if (Tests.long_index_mul_scale_16(unsafe, addr9, idx9) != magic) throw new Exception(); 143 } 144 } 145 } 146 } 147