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1 /* |
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2 * Copyright (c) 2016, 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 * @test |
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26 * @bug 8161720 |
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27 * @modules java.base/jdk.internal.misc |
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28 * @run main/othervm -Xint UnsafeOffHeapBooleanTest 1 |
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29 * @run main/othervm -XX:+TieredCompilation -XX:TieredStopAtLevel=3 -Xbatch UnsafeOffHeapBooleanTest 20000 |
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30 * @run main/othervm -XX:-TieredCompilation -Xbatch UnsafeOffHeapBooleanTest 20000 |
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31 */ |
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32 |
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33 |
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34 import java.lang.reflect.Field; |
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35 import jdk.internal.misc.Unsafe; |
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36 |
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37 public class UnsafeOffHeapBooleanTest { |
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38 static boolean bool0 = false, bool1 = false, result = false; |
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39 static Unsafe UNSAFE = Unsafe.getUnsafe(); |
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40 static long offHeapMemory; |
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41 |
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42 public static void test() { |
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43 // Write two bytes to the off-heap memory location, both |
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44 // bytes correspond to the boolean value 'true'. |
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45 UNSAFE.putShort(null, offHeapMemory, (short)0x0204); |
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46 |
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47 // Read two bytes from the storage allocated above (as booleans). |
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48 bool0 = UNSAFE.getBoolean(null, offHeapMemory + 0); |
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49 bool1 = UNSAFE.getBoolean(null, offHeapMemory + 1); |
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50 result = bool0 & bool1; |
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51 } |
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52 |
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53 public static void main(String args[]) { |
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54 System.out.println("### Test started"); |
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55 |
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56 if (args.length != 1) { |
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57 throw new RuntimeException("### Test failure: test called with incorrect number of arguments"); |
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58 } |
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59 |
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60 // Allocate two bytes of storage. |
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61 offHeapMemory = UNSAFE.allocateMemory(2); |
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62 |
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63 try { |
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64 for (int i = 0; i < Integer.parseInt(args[0]); i++) { |
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65 test(); |
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66 } |
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67 |
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68 // Check if the two 'true' boolean values were normalized |
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69 // (i.e., reduced from the range 1...255 to 1). |
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70 if (!bool0 || !bool1 || !result) { |
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71 System.out.println("Some of the results below are wrong"); |
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72 System.out.println("bool0 is: " + bool0); |
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73 System.out.println("bool1 is: " + bool1); |
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74 System.out.println("bool0 & bool1 is: " + result); |
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75 System.out.println("==================================="); |
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76 throw new RuntimeException("### Test failed"); |
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77 } else { |
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78 System.out.println("Test generated correct results"); |
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79 System.out.println("bool0 is: " + bool0); |
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80 System.out.println("bool1 is: " + bool1); |
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81 System.out.println("bool0 & bool1 is: " + result); |
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82 System.out.println("==================================="); |
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83 } |
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84 } catch (NumberFormatException e) { |
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85 throw new RuntimeException("### Test failure: test called with incorrectly formatted parameter"); |
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86 } |
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87 |
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88 UNSAFE.freeMemory(offHeapMemory); |
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89 |
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90 System.out.println("### Test passed"); |
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91 } |
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92 } |