/*

 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "precompiled.hpp"

/////////////// Unit tests ///////////////

#ifndef PRODUCT

#include "oops/arrayOop.hpp"

#include "oops/oop.inline.hpp"

#include "utilities/globalDefinitions.hpp"

bool arrayOopDesc::check_max_length_overflow(BasicType type) {

  julong length = max_array_length(type);

  julong bytes_per_element = type2aelembytes(type);

  julong bytes = length * bytes_per_element + header_size_in_bytes();

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

}

void arrayOopDesc::test_max_array_length() {

  assert(check_max_length_overflow(T_BOOLEAN), "size_t overflow for boolean array");

  assert(check_max_length_overflow(T_CHAR), "size_t overflow for char array");

  assert(check_max_length_overflow(T_FLOAT), "size_t overflow for float array");

  assert(check_max_length_overflow(T_DOUBLE), "size_t overflow for double array");

  assert(check_max_length_overflow(T_BYTE), "size_t overflow for byte array");

  assert(check_max_length_overflow(T_SHORT), "size_t overflow for short array");

  assert(check_max_length_overflow(T_INT), "size_t overflow for int array");

  assert(check_max_length_overflow(T_LONG), "size_t overflow for long array");

  assert(check_max_length_overflow(T_OBJECT), "size_t overflow for object array");

  assert(check_max_length_overflow(T_ARRAY), "size_t overflow for array array");

  assert(check_max_length_overflow(T_NARROWOOP), "size_t overflow for narrowOop array");

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

}

#endif //PRODUCT