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annotate test/compiler/6778657/Test.java @ 20218:828056cf311f

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8040792: G1: Memory usage calculation uses sizeof(this) instead of sizeof(classname) Summary: A few locations in the code use sizeof(this) which returns the size of the pointer instead of sizeof(classname) which returns the size of the sum of its members. This change fixes these errors and adds a few tests. Reviewed-by: mgerdin, brutisso
author tschatzl
date Mon, 21 Jul 2014 09:40:19 +0200
parents c18cbe5936b8
children
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1 /*
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2 * Copyright (c) 2008, 2009, 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 /*
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26 * @test
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27 * @bug 6778657
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28 * @summary Casts in SharedRuntime::f2i, f2l, d2i and d2l rely on undefined C++ behaviour
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29 */
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31 public class Test {
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32 public static void check_f2i(int expect) {
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33 float check = expect;
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34 check *= 2;
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35 int actual = (int) check;
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36 if (actual != expect)
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37 throw new RuntimeException("expecting " + expect + ", got " + actual);
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38 }
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39
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40 public static void check_f2l(long expect) {
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41 float check = expect;
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42 check *= 2;
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43 long actual = (long) check;
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44 if (actual != expect)
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45 throw new RuntimeException("expecting " + expect + ", got " + actual);
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46 }
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48 public static void check_d2i(int expect) {
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49 double check = expect;
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50 check *= 2;
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51 int actual = (int) check;
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52 if (actual != expect)
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53 throw new RuntimeException("expecting " + expect + ", got " + actual);
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54 }
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56 public static void check_d2l(long expect) {
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57 double check = expect;
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58 check *= 2;
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59 long actual = (long) check;
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60 if (actual != expect)
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61 throw new RuntimeException("expecting " + expect + ", got " + actual);
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62 }
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64 public static void main(String[] args) {
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65 check_f2i(Integer.MAX_VALUE);
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66 check_f2i(Integer.MIN_VALUE);
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67 check_f2l(Long.MAX_VALUE);
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68 check_f2l(Long.MIN_VALUE);
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69 check_d2i(Integer.MAX_VALUE);
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70 check_d2i(Integer.MIN_VALUE);
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71 check_d2l(Long.MAX_VALUE);
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72 check_d2l(Long.MIN_VALUE);
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73 }
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74 }
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75