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annotate src/share/vm/oops/arrayOop.cpp @ 17716:cdb71841f4bc

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6498581: ThreadInterruptTest3 produces wrong output on Windows Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set. Reviewed-by: acorn, kvn Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
author minqi
date Wed, 26 Feb 2014 15:20:41 -0800
parents 0382d2b469b2
children
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1 /*
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2 * Copyright (c) 1997, 2012, 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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28
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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 "oops/oop.inline.hpp"
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33 #include "utilities/globalDefinitions.hpp"
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34
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35 bool arrayOopDesc::check_max_length_overflow(BasicType type) {
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36 julong length = max_array_length(type);
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37 julong bytes_per_element = type2aelembytes(type);
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38 julong bytes = length * bytes_per_element + header_size_in_bytes();
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39 return (julong)(size_t)bytes == bytes;
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40 }
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41
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42 void arrayOopDesc::test_max_array_length() {
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43 assert(check_max_length_overflow(T_BOOLEAN), "size_t overflow for boolean array");
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44 assert(check_max_length_overflow(T_CHAR), "size_t overflow for char array");
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45 assert(check_max_length_overflow(T_FLOAT), "size_t overflow for float array");
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46 assert(check_max_length_overflow(T_DOUBLE), "size_t overflow for double array");
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47 assert(check_max_length_overflow(T_BYTE), "size_t overflow for byte array");
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48 assert(check_max_length_overflow(T_SHORT), "size_t overflow for short array");
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49 assert(check_max_length_overflow(T_INT), "size_t overflow for int array");
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50 assert(check_max_length_overflow(T_LONG), "size_t overflow for long array");
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51 assert(check_max_length_overflow(T_OBJECT), "size_t overflow for object array");
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52 assert(check_max_length_overflow(T_ARRAY), "size_t overflow for array array");
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53 assert(check_max_length_overflow(T_NARROWOOP), "size_t overflow for narrowOop array");
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54
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55 // T_VOID and T_ADDRESS are not supported by max_array_length()
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56 }
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57
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58
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59 #endif //PRODUCT