Mercurial > hg > truffle
annotate test/compiler/7190310/Test7190310_unsafe.java @ 17726:085b304a1cc5
8027754: Enable loop optimizations for loops with MathExact inside
Reviewed-by: kvn, iveresov
author | rbackman |
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date | Thu, 23 Jan 2014 12:08:28 +0100 |
parents | 09aad8452938 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 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 /* |
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26 * @test |
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27 * @bug 7190310 |
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28 * @summary Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops |
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29 * @run main/othervm -Xbatch Test7190310_unsafe |
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30 */ |
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31 |
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32 import java.lang.ref.*; |
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33 import java.lang.reflect.*; |
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34 import sun.misc.Unsafe; |
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35 |
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36 public class Test7190310_unsafe { |
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37 |
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38 static class TestObject { |
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39 public String toString() { |
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40 return "TestObject"; |
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41 } |
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42 }; |
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43 |
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44 private static TestObject str = new TestObject(); |
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45 private static final WeakReference ref = new WeakReference(str); |
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46 |
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47 private TestObject obj; |
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48 |
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49 public static void main(String[] args) throws Exception { |
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50 Class c = Test7190310_unsafe.class.getClassLoader().loadClass("sun.misc.Unsafe"); |
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51 Field f = c.getDeclaredField("theUnsafe"); |
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52 f.setAccessible(true); |
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53 Unsafe unsafe = (Unsafe)f.get(c); |
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54 |
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55 f = Reference.class.getDeclaredField("referent"); |
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56 f.setAccessible(true); |
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57 long referent_offset = unsafe.objectFieldOffset(f); |
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58 |
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59 Test7190310_unsafe t = new Test7190310_unsafe(); |
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60 TestObject o = new TestObject(); |
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61 t.obj = o; |
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62 |
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63 // Warmup (compile methods) |
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64 System.err.println("Warmup"); |
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65 Object obj = null; |
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66 for (int i = 0; i < 11000; i++) { |
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67 obj = getRef0(ref); |
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68 } |
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69 for (int i = 0; i < 11000; i++) { |
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70 obj = getRef1(unsafe, ref, referent_offset); |
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71 } |
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72 for (int i = 0; i < 11000; i++) { |
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73 obj = getRef2(unsafe, ref, referent_offset); |
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74 } |
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75 for (int i = 0; i < 11000; i++) { |
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76 obj = getRef3(unsafe, ref, referent_offset); |
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77 } |
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78 for (int i = 0; i < 11000; i++) { |
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79 obj = getRef4(unsafe, t, referent_offset); |
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80 } |
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81 |
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82 // Access verification |
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83 System.err.println("Verification"); |
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84 if (!verifyGet(referent_offset, unsafe)) { |
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85 System.exit(97); |
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86 } |
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87 |
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88 obj = getRef3(unsafe, t, referent_offset); |
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89 if (obj != o) { |
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90 System.out.println("FAILED: unsafe.getObject(Object, " + referent_offset + ") " + obj + " != " + o); |
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91 System.exit(97); |
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92 } |
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93 obj = getRef4(unsafe, t, referent_offset); |
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94 if (obj != o) { |
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95 System.out.println("FAILED: unsafe.getObject(Test7190310, " + referent_offset + ") " + obj + " != " + o); |
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96 System.exit(97); |
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97 } |
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98 } |
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99 |
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100 static boolean verifyGet(long referent_offset, Unsafe unsafe) throws Exception { |
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101 // Access verification |
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102 System.out.println("referent: " + str); |
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103 Object obj = getRef0(ref); |
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104 if (obj != str) { |
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105 System.out.println("FAILED: weakRef.get() " + obj + " != " + str); |
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106 return false; |
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107 } |
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108 obj = getRef1(unsafe, ref, referent_offset); |
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109 if (obj != str) { |
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110 System.out.println("FAILED: unsafe.getObject(weakRef, " + referent_offset + ") " + obj + " != " + str); |
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111 return false; |
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112 } |
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113 obj = getRef2(unsafe, ref, referent_offset); |
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114 if (obj != str) { |
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115 System.out.println("FAILED: unsafe.getObject(abstRef, " + referent_offset + ") " + obj + " != " + str); |
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116 return false; |
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117 } |
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118 obj = getRef3(unsafe, ref, referent_offset); |
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119 if (obj != str) { |
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120 System.out.println("FAILED: unsafe.getObject(Object, " + referent_offset + ") " + obj + " != " + str); |
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121 return false; |
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122 } |
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123 return true; |
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124 } |
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125 |
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126 static Object getRef0(WeakReference ref) throws Exception { |
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127 return ref.get(); |
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128 } |
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129 static Object getRef1(Unsafe unsafe, WeakReference ref, long referent_offset) throws Exception { |
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130 return unsafe.getObject(ref, referent_offset); |
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131 } |
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132 static Object getRef2(Unsafe unsafe, Reference ref, long referent_offset) throws Exception { |
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133 return unsafe.getObject(ref, referent_offset); |
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134 } |
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135 static Object getRef3(Unsafe unsafe, Object ref, long referent_offset) throws Exception { |
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136 return unsafe.getObject(ref, referent_offset); |
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137 } |
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138 static Object getRef4(Unsafe unsafe, Test7190310_unsafe ref, long referent_offset) throws Exception { |
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139 return unsafe.getObject(ref, referent_offset); |
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140 } |
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141 } |
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142 |