1 /*

     2  * Copyright (c) 1997, 2010, 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 4017728 4079849 6788196

    27  * @summary Check for correct Array Bounds check in read of FileInputStream and

    28  * RandomAccessFile

    29  */

    30 

    31 import java.io.*;

    32 

    33 /*

    34  * The test calls the read(byte buf[] , int off , int len) of

    35  * FileInputStream with different values of off and len to see if the

    36  * IndexOutOfBoundsException is thrown.  The read(...) method calls

    37  * readBytes(...) in native code(io_util.c).  The read(...) method in

    38  * RandomAccessFile also calls the same native method.  So one should

    39  * see similar results.

    40  */

    41 

    42 public class ReadBytesBounds {

    43 

    44     static final FileInputStream fis;

    45     static final RandomAccessFile raf;

    46     static final byte[] b = new byte[32];

    47 

    48     static {

    49         try {

    50             String dir = System.getProperty("test.src", ".");

    51             File testFile = new File(dir, "input.txt");

    52             fis = new FileInputStream(testFile);

    53             raf = new RandomAccessFile(testFile , "r");

    54         } catch (Throwable t) {

    55             throw new Error(t);

    56         }

    57     }

    58 

    59     public static void main(String argv[]) throws Throwable {

    60         try {

    61             testRead(-1, -1, false);

    62             testRead(-1,  0, false);

    63             testRead( 0, -1, false);

    64             testRead( 0, 33, false);

    65             testRead(33,  0, false);

    66             testRead(33,  4, false);

    67             testRead( 0, 32, true);

    68             testRead(32,  0, true);

    69             testRead(32,  4, false);

    70             testRead( 4, 16, true);

    71             testRead( 1, 31, true);

    72             testRead( 0,  0, true);

    73             testRead(31,  Integer.MAX_VALUE, false);

    74             testRead( 0,  Integer.MAX_VALUE, false);

    75             testRead(-1,  Integer.MAX_VALUE, false);

    76             testRead(-4,  Integer.MIN_VALUE, false);

    77             testRead( 0,  Integer.MIN_VALUE, false);

    78         } finally {

    79             fis.close();

    80             raf.close();

    81         }

    82     }

    83 

    84     static void testRead(int off, int len, boolean expected) throws Throwable {

    85         System.err.printf("off=%d len=%d expected=%b%n", off, len, expected);

    86         boolean result;

    87         try {

    88             fis.read(b, off, len);

    89             raf.read(b, off, len);

    90             result = true;

    91         } catch (IndexOutOfBoundsException e) {

    92             result = false;

    93         }

    94 

    95         if (result != expected) {

    96             throw new RuntimeException

    97                 (String.format("Unexpected result off=%d len=%d expected=%b",

    98                                off, len, expected));

    99         }

   100     }

   101 }