jdk8-mips64-public/hotspot: src/share/vm/oops/arrayOop.cpp@6fd81579526f

7102044: G1: VM crashes with assert(old_end != new_end) failed: don't call this otherwise
Summary: arrayOopDesc::max_array_length() should return a value that does not overflow a size_t if it is converted to bytes.
Reviewed-by: kvn, dholmes

     1 /*

     2  * Copyright (c) 1997, 2011, 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  */

    25 #include "precompiled.hpp"

    27 /////////////// Unit tests ///////////////

    29 #ifndef PRODUCT

    31 #include "oops/arrayOop.hpp"

    32 #include "utilities/globalDefinitions.hpp"

    34 bool arrayOopDesc::check_max_length_overflow(BasicType type) {

    35   julong length = max_array_length(type);

    36   julong bytes_per_element = type2aelembytes(type);

    37   julong bytes = length * bytes_per_element + header_size_in_bytes();

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

    39 }

    41 bool arrayOopDesc::test_max_array_length() {

    42   tty->print_cr("test_max_array_length");

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

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

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

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

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

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

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

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

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

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

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

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

    58   return true;

    59 }

    62 #endif //PRODUCT

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/oops/arrayOop.cpp@6fd81579526f

src/share/vm/oops/arrayOop.cpp