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 }