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 24 import jdk.internal.misc.Unsafe; 25 26 /* 27 * @test 28 * @summary Test Unsafe.copyMemory 29 * @modules java.base/jdk.internal.misc 30 */ 31 public class CopyMemory extends CopyCommon { 32 private CopyMemory() { 33 } 34 35 /** 36 * Run positive tests 37 * 38 * @throws RuntimeException if an error is found 39 */ 40 private void testPositive() { 41 testSmallCopy(false); 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 illegal sizes 58 System.out.println("Testing negative size"); 59 try { 60 UNSAFE.copyMemory(null, buf, null, buf, -1); 61 throw new RuntimeException("copyMemory failed to throw IAE for size=-1"); 62 } catch (IllegalArgumentException e) { 63 // good 64 } 65 66 System.out.println("Testing negative srcOffset"); 67 try { 68 // Check that negative srcOffset throws an IAE 69 UNSAFE.copyMemory(arr, -1, arr, UNSAFE.arrayBaseOffset(arr.getClass()), 16); 70 throw new RuntimeException("copyMemory failed to throw IAE for srcOffset=-1"); 71 } catch (IllegalArgumentException e) { 72 // good 73 } 74 75 System.out.println("Testing negative destOffset"); 76 try { 77 // Check that negative dstOffset throws an IAE 78 UNSAFE.copyMemory(arr, UNSAFE.arrayBaseOffset(arr.getClass()), arr, -1, 16); 79 throw new RuntimeException("copyMemory failed to throw IAE for destOffset=-1"); 80 } catch (IllegalArgumentException e) { 81 // good 82 } 83 84 System.out.println("Testing reference array"); 85 try { 86 // Check that a reference array destination throws IAE 87 UNSAFE.copyMemory(null, buf, new Object[16], UNSAFE.arrayBaseOffset(Object[].class), 16); 88 throw new RuntimeException("copyMemory failed to throw IAE"); 89 } catch (IllegalArgumentException e) { 90 // good 91 } 92 93 // Check that invalid source & dest pointers throw IAEs (only relevant on 32-bit platforms) 94 if (UNSAFE.addressSize() == 4) { 95 long invalidPtr = (long)1 << 35; // Pick a random bit in upper 32 bits 96 97 try { 98 // Check that an invalid (not 32-bit clean) source pointer throws IAE 99 UNSAFE.copyMemory(null, invalidPtr, null, buf, 16); 100 throw new RuntimeException("copyMemory failed to throw IAE for srcOffset 0x" + 101 Long.toHexString(invalidPtr)); 102 } catch (IllegalArgumentException e) { 103 // good 104 } 105 106 try { 107 // Check that an invalid (not 32-bit clean) source pointer throws IAE 108 UNSAFE.copyMemory(null, buf, null, invalidPtr, 16); 109 throw new RuntimeException("copyMemory failed to throw IAE for destOffset 0x" + 110 Long.toHexString(invalidPtr)); 111 } catch (IllegalArgumentException e) { 112 // good 113 } 114 } 115 } finally { 116 if (bufRaw != 0) { 117 UNSAFE.freeMemory(bufRaw); 118 } 119 } 120 } 121 122 /** 123 * Run all tests 124 * 125 * @throws RuntimeException if an error is found 126 */ 127 private void test() { 128 testPositive(); 129 testNegative(); 130 } 131 132 public static void main(String[] args) { 133 CopyMemory cs = new CopyMemory(); 134 cs.test(); 135 } 136 }