• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/oops/arrayOop.cpp@624a0741915c (annotated)

src/share/vm/oops/arrayOop.cpp

Thu, 04 Apr 2019 17:56:29 +0800

author

aoqi

date

Thu, 04 Apr 2019 17:56:29 +0800

changeset 9572

624a0741915c

parent 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26
aoqi@0	27	/////////////// Unit tests ///////////////
aoqi@0	28
aoqi@0	29	#ifndef PRODUCT
aoqi@0	30
aoqi@0	31	#include "oops/arrayOop.hpp"
aoqi@0	32	#include "oops/oop.inline.hpp"
aoqi@0	33	#include "utilities/globalDefinitions.hpp"
aoqi@0	34
aoqi@0	35	bool arrayOopDesc::check_max_length_overflow(BasicType type) {
aoqi@0	36	julong length = max_array_length(type);
aoqi@0	37	julong bytes_per_element = type2aelembytes(type);
aoqi@0	38	julong bytes = length * bytes_per_element + header_size_in_bytes();
aoqi@0	39	return (julong)(size_t)bytes == bytes;
aoqi@0	40	}
aoqi@0	41
aoqi@0	42	void arrayOopDesc::test_max_array_length() {
aoqi@0	43	assert(check_max_length_overflow(T_BOOLEAN), "size_t overflow for boolean array");
aoqi@0	44	assert(check_max_length_overflow(T_CHAR), "size_t overflow for char array");
aoqi@0	45	assert(check_max_length_overflow(T_FLOAT), "size_t overflow for float array");
aoqi@0	46	assert(check_max_length_overflow(T_DOUBLE), "size_t overflow for double array");
aoqi@0	47	assert(check_max_length_overflow(T_BYTE), "size_t overflow for byte array");
aoqi@0	48	assert(check_max_length_overflow(T_SHORT), "size_t overflow for short array");
aoqi@0	49	assert(check_max_length_overflow(T_INT), "size_t overflow for int array");
aoqi@0	50	assert(check_max_length_overflow(T_LONG), "size_t overflow for long array");
aoqi@0	51	assert(check_max_length_overflow(T_OBJECT), "size_t overflow for object array");
aoqi@0	52	assert(check_max_length_overflow(T_ARRAY), "size_t overflow for array array");
aoqi@0	53	assert(check_max_length_overflow(T_NARROWOOP), "size_t overflow for narrowOop array");
aoqi@0	54
aoqi@0	55	// T_VOID and T_ADDRESS are not supported by max_array_length()
aoqi@0	56	}
aoqi@0	57
aoqi@0	58
aoqi@0	59	#endif //PRODUCT