| /* |
| * 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 |