1 /* 2 * Copyright (c) 1997, 2008, 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 /** 26 * @test 27 * @bug 6663621 28 * @summary JVM crashes while trying to execute api/java_security/Signature/SignatureTests.html#initSign tests. 29 */ 30 31 public class IVTest { 32 static int paddedSize; 33 34 static void padV15(byte[] padded) { 35 int psSize = padded.length; 36 int k = 0; 37 while (psSize-- > 0) { 38 padded[k++] = (byte)0xff; 39 } 40 } 41 42 static void padV15_2(int paddedSize) { 43 byte[] padded = new byte[paddedSize]; 44 int psSize = padded.length; 45 int k = 0; 46 while (psSize-- > 0) { 47 padded[k++] = (byte)0xff; 48 } 49 } 50 51 static void padV15_3() { 52 byte[] padded = new byte[paddedSize]; 53 int psSize = padded.length; 54 int k = 0; 55 while (psSize-- > 0) { 56 padded[k++] = (byte)0xff; 57 } 58 } 59 60 static void padV15_4() { 61 byte[] padded = new byte[paddedSize]; 62 int psSize = padded.length; 63 for (int k = 0;psSize > 0; psSize--) { 64 int i = padded.length - psSize; 65 padded[i] = (byte)0xff; 66 } 67 } 68 69 static void padV15_5() { 70 byte[] padded = new byte[paddedSize]; 71 int psSize = padded.length; 72 int k = psSize - 1; 73 for (int i = 0; i < psSize; i++) { 74 padded[k--] = (byte)0xff; 75 } 76 } 77 78 public static void main(String argv[]) { 79 int bounds = 1024; 80 int lim = 500000; 81 long start = System.currentTimeMillis(); 82 for (int j = 0; j < lim; j++) { 83 paddedSize = j % bounds; 84 padV15(new byte[paddedSize]); 85 } 86 long end = System.currentTimeMillis(); 87 System.out.println(end - start); 88 start = System.currentTimeMillis(); 89 for (int j = 0; j < lim; j++) { 90 paddedSize = j % bounds; 91 padV15_2(paddedSize); 92 } 93 end = System.currentTimeMillis(); 94 System.out.println(end - start); 95 start = System.currentTimeMillis(); 96 for (int j = 0; j < lim; j++) { 97 paddedSize = j % bounds; 98 padV15_3(); 99 } 100 end = System.currentTimeMillis(); 101 System.out.println(end - start); 102 start = System.currentTimeMillis(); 103 for (int j = 0; j < lim; j++) { 104 paddedSize = j % bounds; 105 padV15_4(); 106 } 107 end = System.currentTimeMillis(); 108 System.out.println(end - start); 109 start = System.currentTimeMillis(); 110 for (int j = 0; j < lim; j++) { 111 paddedSize = j % bounds; 112 padV15_5(); 113 } 114 end = System.currentTimeMillis(); 115 System.out.println(end - start); 116 } 117 }