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()