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annotate src/share/vm/oops/arrayOop.cpp @ 4708:3c648b9ad052

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7121373: Clean up CollectedHeap::is_in Summary: Fixed G1CollectedHeap::is_in, added tests, cleaned up comments and made Space::is_in pure virtual. Reviewed-by: brutisso, tonyp, jcoomes
author stefank
date Wed, 14 Dec 2011 12:15:26 +0100
parents 6fd81579526f
children 0382d2b469b2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26
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27 /////////////// Unit tests ///////////////
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29 #ifndef PRODUCT
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30
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31 #include "oops/arrayOop.hpp"
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32 #include "utilities/globalDefinitions.hpp"
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33
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34 bool arrayOopDesc::check_max_length_overflow(BasicType type) {
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35 julong length = max_array_length(type);
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36 julong bytes_per_element = type2aelembytes(type);
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37 julong bytes = length * bytes_per_element + header_size_in_bytes();
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38 return (julong)(size_t)bytes == bytes;
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39 }
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40
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41 void arrayOopDesc::test_max_array_length() {
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42 assert(check_max_length_overflow(T_BOOLEAN), "size_t overflow for boolean array");
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43 assert(check_max_length_overflow(T_CHAR), "size_t overflow for char array");
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44 assert(check_max_length_overflow(T_FLOAT), "size_t overflow for float array");
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45 assert(check_max_length_overflow(T_DOUBLE), "size_t overflow for double array");
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46 assert(check_max_length_overflow(T_BYTE), "size_t overflow for byte array");
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47 assert(check_max_length_overflow(T_SHORT), "size_t overflow for short array");
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48 assert(check_max_length_overflow(T_INT), "size_t overflow for int array");
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49 assert(check_max_length_overflow(T_LONG), "size_t overflow for long array");
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50 assert(check_max_length_overflow(T_OBJECT), "size_t overflow for object array");
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51 assert(check_max_length_overflow(T_ARRAY), "size_t overflow for array array");
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52 assert(check_max_length_overflow(T_NARROWOOP), "size_t overflow for narrowOop array");
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53
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54 // T_VOID and T_ADDRESS are not supported by max_array_length()
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55 }
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56
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57
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58 #endif //PRODUCT