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 

    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 

    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 

    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 

    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 

    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 

    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 }