1/* 2 * Copyright (c) 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 24import jdk.internal.misc.Unsafe; 25 26/* 27 * @test 28 * @summary Test Unsafe.copySwapMemory 29 * @modules java.base/jdk.internal.misc 30 */ 31public class CopySwap extends CopyCommon { 32 private CopySwap() { 33 } 34 35 /** 36 * Run positive tests 37 * 38 * @throws RuntimeException if an error is found 39 */ 40 private void testPositive() { 41 testSmallCopy(true); 42 } 43 44 /** 45 * Run negative tests, testing corner cases and the various exceptions 46 * 47 * @throws RuntimeException if an error is found 48 */ 49 private void testNegative() { 50 long bufRaw = 0; 51 52 try { 53 bufRaw = UNSAFE.allocateMemory(1024); 54 long buf = CopyCommon.alignUp(bufRaw, CopyCommon.BASE_ALIGNMENT); 55 short[] arr = new short[16]; 56 57 // Check various illegal element sizes 58 for (int elemSize = 2; elemSize <= 8; elemSize <<= 1) { 59 long[] illegalSizes = { -1, 1, elemSize - 1, elemSize + 1, elemSize * 2 - 1 }; 60 for (long size : illegalSizes) { 61 try { 62 // Check that illegal elemSize throws an IAE 63 UNSAFE.copySwapMemory(null, buf, null, buf, size, elemSize); 64 throw new RuntimeException("copySwapMemory failed to throw IAE for size=" + size + " elemSize=" + elemSize); 65 } catch (IllegalArgumentException e) { 66 // good 67 } 68 } 69 } 70 71 try { 72 // Check that negative srcOffset throws an IAE 73 UNSAFE.copySwapMemory(arr, -1, arr, UNSAFE.arrayBaseOffset(arr.getClass()), 16, 2); 74 throw new RuntimeException("copySwapMemory failed to throw IAE for srcOffset=-1"); 75 } catch (IllegalArgumentException e) { 76 // good 77 } 78 79 try { 80 // Check that negative dstOffset throws an IAE 81 UNSAFE.copySwapMemory(arr, UNSAFE.arrayBaseOffset(arr.getClass()), arr, -1, 16, 2); 82 throw new RuntimeException("copySwapMemory failed to throw IAE for destOffset=-1"); 83 } catch (IllegalArgumentException e) { 84 // good 85 } 86 87 long illegalElemSizes[] = { 0, 1, 3, 5, 6, 7, 9, 10, -1 }; 88 for (long elemSize : illegalElemSizes) { 89 try { 90 // Check that elemSize 1 throws an IAE 91 UNSAFE.copySwapMemory(null, buf, null, buf, 16, elemSize); 92 throw new RuntimeException("copySwapMemory failed to throw NPE"); 93 } catch (IllegalArgumentException e) { 94 // good 95 } 96 } 97 98 try { 99 // Check that a reference array destination throws IAE 100 UNSAFE.copySwapMemory(null, buf, new Object[16], UNSAFE.arrayBaseOffset(Object[].class), 16, 8); 101 throw new RuntimeException("copySwapMemory failed to throw NPE"); 102 } catch (IllegalArgumentException e) { 103 // good 104 } 105 106 // Check that invalid source & dest pointers throw IAEs (only relevant on 32-bit platforms) 107 if (UNSAFE.addressSize() == 4) { 108 long invalidPtr = (long)1 << 35; // Pick a random bit in upper 32 bits 109 110 try { 111 // Check that an invalid (not 32-bit clean) source pointer throws IAE 112 UNSAFE.copySwapMemory(null, invalidPtr, null, buf, 16, 2); 113 throw new RuntimeException("copySwapMemory failed to throw IAE for srcOffset 0x" + 114 Long.toHexString(invalidPtr)); 115 } catch (IllegalArgumentException e) { 116 // good 117 } 118 119 try { 120 // Check that an invalid (not 32-bit clean) source pointer throws IAE 121 UNSAFE.copySwapMemory(null, buf, null, invalidPtr, 16, 2); 122 throw new RuntimeException("copySwapMemory failed to throw IAE for destOffset 0x" + 123 Long.toHexString(invalidPtr)); 124 } catch (IllegalArgumentException e) { 125 // good 126 } 127 } 128 } finally { 129 if (bufRaw != 0) { 130 UNSAFE.freeMemory(bufRaw); 131 } 132 } 133 } 134 135 /** 136 * Run all tests 137 * 138 * @throws RuntimeException if an error is found 139 */ 140 private void test() { 141 testPositive(); 142 testNegative(); 143 } 144 145 public static void main(String[] args) { 146 CopySwap cs = new CopySwap(); 147 cs.test(); 148 } 149} 150