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annotate graal/com.oracle.graal.hotspot.test/src/com/oracle/graal/hotspot/test/WriteBarrierAdditionTest.java @ 21543:93c50cefb9e8

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moved GraalInternalError to com.oracle.jvmci.common and renamed it to JVMCIError (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Mon, 25 May 2015 23:30:34 +0200
parents 5e868236654f
children 5324104ac4f3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2013, 2015, 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 package com.oracle.graal.hotspot.test;
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24
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25 import static com.oracle.jvmci.common.UnsafeAccess.*;
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26
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27 import java.lang.ref.*;
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28
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29 import org.junit.*;
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30
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31 import sun.misc.*;
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32
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33 import com.oracle.graal.api.meta.*;
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34 import com.oracle.graal.compiler.test.*;
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35 import com.oracle.graal.debug.*;
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36 import com.oracle.graal.debug.Debug.Scope;
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37 import com.oracle.graal.hotspot.*;
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38 import com.oracle.graal.hotspot.jvmci.*;
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39 import com.oracle.graal.hotspot.nodes.*;
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40 import com.oracle.graal.hotspot.phases.*;
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41 import com.oracle.graal.hotspot.replacements.*;
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42 import com.oracle.graal.nodes.*;
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43 import com.oracle.graal.nodes.StructuredGraph.AllowAssumptions;
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44 import com.oracle.graal.nodes.extended.*;
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45 import com.oracle.graal.nodes.memory.HeapAccess.BarrierType;
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46 import com.oracle.graal.nodes.memory.*;
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47 import com.oracle.graal.nodes.spi.*;
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48 import com.oracle.graal.phases.*;
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49 import com.oracle.graal.phases.common.*;
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50 import com.oracle.graal.phases.common.inlining.*;
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51 import com.oracle.graal.phases.common.inlining.policy.*;
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52 import com.oracle.graal.phases.tiers.*;
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53
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54 /**
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55 * The following unit tests assert the presence of write barriers for both Serial and G1 GCs.
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56 * Normally, the tests check for compile time inserted barriers. However, there are the cases of
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57 * unsafe loads of the java.lang.ref.Reference.referent field where runtime checks have to be
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58 * performed also. For those cases, the unit tests check the presence of the compile-time inserted
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59 * barriers. Concerning the runtime checks, the results of variable inputs (object types and
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60 * offsets) passed as input parameters can be checked against printed output from the G1 write
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61 * barrier snippets. The runtime checks have been validated offline.
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62 */
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63 public class WriteBarrierAdditionTest extends GraalCompilerTest {
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64
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65 private static final HotSpotVMConfig config = HotSpotGraalRuntime.runtime().getConfig();
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66 private static final long referentOffset = HotSpotReplacementsUtil.referentOffset();
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67
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68 public static class Container {
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69
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70 public Container a;
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71 public Container b;
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72 }
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73
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74 /**
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75 * Expected 2 barriers for the Serial GC and 4 for G1 (2 pre + 2 post).
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76 */
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77 @Test
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78 public void test1() throws Exception {
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79 testHelper("test1Snippet", (config.useG1GC) ? 4 : 2);
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80 }
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81
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82 public static void test1Snippet() {
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83 Container main = new Container();
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84 Container temp1 = new Container();
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85 Container temp2 = new Container();
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86 main.a = temp1;
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87 main.b = temp2;
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88 }
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89
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90 /**
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91 * Expected 4 barriers for the Serial GC and 8 for G1 (4 pre + 4 post).
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92 */
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93 @Test
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94 public void test2() throws Exception {
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95 testHelper("test2Snippet", config.useG1GC ? 8 : 4);
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96 }
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97
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98 public static void test2Snippet(boolean test) {
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99 Container main = new Container();
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100 Container temp1 = new Container();
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101 Container temp2 = new Container();
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102 for (int i = 0; i < 10; i++) {
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103 if (test) {
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104 main.a = temp1;
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105 main.b = temp2;
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106 } else {
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107 main.a = temp2;
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108 main.b = temp1;
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109 }
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110 }
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111 }
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112
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113 /**
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114 * Expected 4 barriers for the Serial GC and 8 for G1 (4 pre + 4 post).
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115 */
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116 @Test
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117 public void test3() throws Exception {
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118 testHelper("test3Snippet", config.useG1GC ? 8 : 4);
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119 }
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120
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121 public static void test3Snippet() {
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122 Container[] main = new Container[10];
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123 Container temp1 = new Container();
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124 Container temp2 = new Container();
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125 for (int i = 0; i < 10; i++) {
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126 main[i].a = main[i].b = temp1;
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127 }
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128
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129 for (int i = 0; i < 10; i++) {
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130 main[i].a = main[i].b = temp2;
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131 }
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132 }
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133
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134 /**
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135 * Expected 2 barriers for the Serial GC and 5 for G1 (3 pre + 2 post) The (2 or 4) barriers are
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136 * emitted while initializing the fields of the WeakReference instance. The extra pre barrier of
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137 * G1 concerns the read of the referent field.
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138 */
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139 @Test
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140 public void test4() throws Exception {
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141 testHelper("test4Snippet", config.useG1GC ? 5 : 2);
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142 }
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143
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144 public static Object test4Snippet() {
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145 WeakReference<Object> weakRef = new WeakReference<>(new Object());
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146 return weakRef.get();
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147 }
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148
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149 static WeakReference<Object> wr = new WeakReference<>(new Object());
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150 static Container con = new Container();
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151
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152 /**
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153 * Expected 4 barriers for the Serial GC and 9 for G1 (1 ref + 4 pre + 4 post). In this test, we
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154 * load the correct offset of the WeakReference object so naturally we assert the presence of
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155 * the pre barrier.
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156 */
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157 @Test
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158 public void test5() throws Exception {
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159 testHelper("test5Snippet", config.useG1GC ? 1 : 0);
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160 }
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161
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162 public static Object test5Snippet() throws Exception {
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163 return unsafe.getObject(wr, config.useCompressedOops ? 12L : 16L);
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164 }
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165
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166 /**
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167 * The following test concerns the runtime checks of the unsafe loads. In this test, we unsafely
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168 * load the java.lang.ref.Reference.referent field so the pre barier has to be executed.
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169 */
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170 @Test
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171 public void test6() throws Exception {
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172 test2("testUnsafeLoad", unsafe, wr, new Long(referentOffset), null);
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173 }
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174
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175 /**
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176 * The following test concerns the runtime checks of the unsafe loads. In this test, we unsafely
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177 * load a matching offset of a wrong object so the pre barier must not be executed.
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178 */
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179 @Test
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180 public void test7() throws Exception {
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181 test2("testUnsafeLoad", unsafe, con, new Long(referentOffset), null);
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182 }
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183
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184 /**
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185 * The following test concerns the runtime checks of the unsafe loads. In this test, we unsafely
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186 * load a non-matching offset field of the java.lang.ref.Reference object so the pre barier must
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187 * not be executed.
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188 */
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189 @Test
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190 public void test8() throws Exception {
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191 test2("testUnsafeLoad", unsafe, wr, new Long(config.useCompressedOops ? 20 : 32), null);
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192 }
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193
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194 /**
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195 * The following test concerns the runtime checks of the unsafe loads. In this test, we unsafely
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196 * load a matching offset+disp field of the java.lang.ref.Reference object so the pre barier
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197 * must be executed.
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198 */
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199 @Test
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200 public void test10() throws Exception {
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201 test2("testUnsafeLoad", unsafe, wr, new Long(config.useCompressedOops ? 6 : 8), new Integer(config.useCompressedOops ? 6 : 8));
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202 }
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203
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204 /**
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205 * The following test concerns the runtime checks of the unsafe loads. In this test, we unsafely
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206 * load a non-matching offset+disp field of the java.lang.ref.Reference object so the pre barier
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207 * must not be executed.
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208 */
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209 @Test
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210 public void test9() throws Exception {
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211 test2("testUnsafeLoad", unsafe, wr, new Long(config.useCompressedOops ? 10 : 16), new Integer(config.useCompressedOops ? 10 : 16));
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212 }
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213
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214 static Object[] src = new Object[1];
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215 static Object[] dst = new Object[1];
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216
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217 static {
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218 for (int i = 0; i < src.length; i++) {
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219 src[i] = new Object();
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220 }
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221 for (int i = 0; i < dst.length; i++) {
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222 dst[i] = new Object();
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223 }
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224 }
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225
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226 public static void testArrayCopy(Object a, Object b, Object c) throws Exception {
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227 System.arraycopy(a, 0, b, 0, (int) c);
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228 }
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229
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230 @Test
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231 public void test11() throws Exception {
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232 test2("testArrayCopy", src, dst, dst.length);
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233 }
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234
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235 public static Object testUnsafeLoad(Unsafe theUnsafe, Object a, Object b, Object c) throws Exception {
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236 final int offset = (c == null ? 0 : ((Integer) c).intValue());
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237 final long displacement = (b == null ? 0 : ((Long) b).longValue());
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238 return theUnsafe.getObject(a, offset + displacement);
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239 }
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240
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241 private HotSpotInstalledCode getInstalledCode(String name, boolean withUnsafePrefix) throws Exception {
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242 final ResolvedJavaMethod javaMethod = withUnsafePrefix ? getResolvedJavaMethod(WriteBarrierAdditionTest.class, name, Unsafe.class, Object.class, Object.class, Object.class)
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243 : getResolvedJavaMethod(WriteBarrierAdditionTest.class, name, Object.class, Object.class, Object.class);
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244 final HotSpotInstalledCode installedCode = (HotSpotInstalledCode) getCode(javaMethod);
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245 return installedCode;
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246 }
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247
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248 private void testHelper(final String snippetName, final int expectedBarriers) throws Exception, SecurityException {
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249 ResolvedJavaMethod snippet = getResolvedJavaMethod(snippetName);
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250 try (Scope s = Debug.scope("WriteBarrierAdditionTest", snippet)) {
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251 StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);
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252 HighTierContext highContext = getDefaultHighTierContext();
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253 MidTierContext midContext = new MidTierContext(getProviders(), getCodeCache().getTarget(), OptimisticOptimizations.ALL, graph.method().getProfilingInfo(), null);
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254 new InliningPhase(new InlineEverythingPolicy(), new CanonicalizerPhase()).apply(graph, highContext);
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255 new CanonicalizerPhase().apply(graph, highContext);
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256 new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, highContext);
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257 new GuardLoweringPhase().apply(graph, midContext);
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258 new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.MID_TIER).apply(graph, midContext);
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259 new WriteBarrierAdditionPhase(config).apply(graph);
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260 Debug.dump(graph, "After Write Barrier Addition");
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261
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262 int barriers = 0;
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263 if (config.useG1GC) {
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264 barriers = graph.getNodes().filter(G1ReferentFieldReadBarrier.class).count() + graph.getNodes().filter(G1PreWriteBarrier.class).count() +
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265 graph.getNodes().filter(G1PostWriteBarrier.class).count();
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266 } else {
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267 barriers = graph.getNodes().filter(SerialWriteBarrier.class).count();
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268 }
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269 Assert.assertEquals(expectedBarriers, barriers);
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270 for (WriteNode write : graph.getNodes().filter(WriteNode.class)) {
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271 if (config.useG1GC) {
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272 if (write.getBarrierType() != BarrierType.NONE) {
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273 Assert.assertEquals(1, write.successors().count());
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274 Assert.assertTrue(write.next() instanceof G1PostWriteBarrier);
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275 Assert.assertTrue(write.predecessor() instanceof G1PreWriteBarrier);
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276 }
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277 } else {
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278 if (write.getBarrierType() != BarrierType.NONE) {
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279 Assert.assertEquals(1, write.successors().count());
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280 Assert.assertTrue(write.next() instanceof SerialWriteBarrier);
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281 }
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282 }
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283 }
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284
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285 for (ReadNode read : graph.getNodes().filter(ReadNode.class)) {
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286 if (read.getBarrierType() != BarrierType.NONE) {
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287 if (read.location() instanceof ConstantLocationNode) {
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288 Assert.assertEquals(referentOffset, ((ConstantLocationNode) (read.location())).getDisplacement());
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289 }
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290 Assert.assertTrue(config.useG1GC);
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291 Assert.assertEquals(BarrierType.PRECISE, read.getBarrierType());
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292 Assert.assertTrue(read.next() instanceof G1ReferentFieldReadBarrier);
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293 }
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294 }
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295 } catch (Throwable e) {
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296 throw Debug.handle(e);
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297 }
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298 }
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299
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300 private void test2(final String snippet, Object... args) throws Exception {
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301 HotSpotInstalledCode code = getInstalledCode(snippet, args[0] instanceof Unsafe);
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302 code.executeVarargs(args);
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303 }
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304 }