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 * @test 26 * @bug 6663621 27 * @summary JVM crashes while trying to execute api/java_security/Signature/SignatureTests.html#initSign tests. 28 * 29 * @run main compiler.c2.IVTest 30 */ 31 32 package compiler.c2; 33 34 public class IVTest { 35 static int paddedSize; 36 padV15(byte[] padded)37 static void padV15(byte[] padded) { 38 int psSize = padded.length; 39 int k = 0; 40 while (psSize-- > 0) { 41 padded[k++] = (byte)0xff; 42 } 43 } 44 padV15_2(int paddedSize)45 static void padV15_2(int paddedSize) { 46 byte[] padded = new byte[paddedSize]; 47 int psSize = padded.length; 48 int k = 0; 49 while (psSize-- > 0) { 50 padded[k++] = (byte)0xff; 51 } 52 } 53 padV15_3()54 static void padV15_3() { 55 byte[] padded = new byte[paddedSize]; 56 int psSize = padded.length; 57 int k = 0; 58 while (psSize-- > 0) { 59 padded[k++] = (byte)0xff; 60 } 61 } 62 padV15_4()63 static void padV15_4() { 64 byte[] padded = new byte[paddedSize]; 65 int psSize = padded.length; 66 for (int k = 0;psSize > 0; psSize--) { 67 int i = padded.length - psSize; 68 padded[i] = (byte)0xff; 69 } 70 } 71 padV15_5()72 static void padV15_5() { 73 byte[] padded = new byte[paddedSize]; 74 int psSize = padded.length; 75 int k = psSize - 1; 76 for (int i = 0; i < psSize; i++) { 77 padded[k--] = (byte)0xff; 78 } 79 } 80 main(String argv[])81 public static void main(String argv[]) { 82 int bounds = 1024; 83 int lim = 500000; 84 long start = System.currentTimeMillis(); 85 for (int j = 0; j < lim; j++) { 86 paddedSize = j % bounds; 87 padV15(new byte[paddedSize]); 88 } 89 long end = System.currentTimeMillis(); 90 System.out.println(end - start); 91 start = System.currentTimeMillis(); 92 for (int j = 0; j < lim; j++) { 93 paddedSize = j % bounds; 94 padV15_2(paddedSize); 95 } 96 end = System.currentTimeMillis(); 97 System.out.println(end - start); 98 start = System.currentTimeMillis(); 99 for (int j = 0; j < lim; j++) { 100 paddedSize = j % bounds; 101 padV15_3(); 102 } 103 end = System.currentTimeMillis(); 104 System.out.println(end - start); 105 start = System.currentTimeMillis(); 106 for (int j = 0; j < lim; j++) { 107 paddedSize = j % bounds; 108 padV15_4(); 109 } 110 end = System.currentTimeMillis(); 111 System.out.println(end - start); 112 start = System.currentTimeMillis(); 113 for (int j = 0; j < lim; j++) { 114 paddedSize = j % bounds; 115 padV15_5(); 116 } 117 end = System.currentTimeMillis(); 118 System.out.println(end - start); 119 } 120 } 121