1 /*

     2  * Copyright (c) 1997, 2016, 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 #include "precompiled.hpp"

    25 #include "oops/arrayOop.hpp"

    26 #include "oops/oop.inline.hpp"

    27 #include "unittest.hpp"

    28 #include "utilities/globalDefinitions.hpp"

    29 

    30 class arrayOopDescTest {

    31  public:

    32 

    33   static int header_size_in_bytes() {

    34     return arrayOopDesc::header_size_in_bytes();

    35   }

    36 };

    37 

    38 static bool check_max_length_overflow(BasicType type) {

    39   julong length = arrayOopDesc::max_array_length(type);

    40   julong bytes_per_element = type2aelembytes(type);

    41   julong bytes = length * bytes_per_element

    42           + arrayOopDescTest::header_size_in_bytes();

    43   return (julong) (size_t) bytes == bytes;

    44 }

    45 

    46 TEST(arrayOopDesc, boolean) {

    47   ASSERT_PRED1(check_max_length_overflow, T_BOOLEAN);

    48 }

    49 

    50 TEST(arrayOopDesc, char) {

    51   ASSERT_PRED1(check_max_length_overflow, T_CHAR);

    52 }

    53 

    54 TEST(arrayOopDesc, float) {

    55   ASSERT_PRED1(check_max_length_overflow, T_FLOAT);

    56 }

    57 

    58 TEST(arrayOopDesc, double) {

    59   ASSERT_PRED1(check_max_length_overflow, T_DOUBLE);

    60 }

    61 

    62 TEST(arrayOopDesc, byte) {

    63   ASSERT_PRED1(check_max_length_overflow, T_BYTE);

    64 }

    65 

    66 TEST(arrayOopDesc, short) {

    67   ASSERT_PRED1(check_max_length_overflow, T_SHORT);

    68 }

    69 

    70 TEST(arrayOopDesc, int) {

    71   ASSERT_PRED1(check_max_length_overflow, T_INT);

    72 }

    73 

    74 TEST(arrayOopDesc, long) {

    75   ASSERT_PRED1(check_max_length_overflow, T_LONG);

    76 }

    77 

    78 TEST(arrayOopDesc, object) {

    79   ASSERT_PRED1(check_max_length_overflow, T_OBJECT);

    80 }

    81 

    82 TEST(arrayOopDesc, array) {

    83   ASSERT_PRED1(check_max_length_overflow, T_ARRAY);

    84 }

    85 

    86 TEST(arrayOopDesc, narrowOop) {

    87   ASSERT_PRED1(check_max_length_overflow, T_NARROWOOP);

    88 }

    89 // T_VOID and T_ADDRESS are not supported by max_array_length()