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annotate graal/com.oracle.graal.compiler.test/src/com/oracle/graal/compiler/test/ProfilingInfoTest.java @ 13771:8576dbd00554

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Merge
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Mon, 27 Jan 2014 15:28:50 -0800
parents af344056124f
children 86ec7f6f71b3
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1 /*
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2 * Copyright (c) 2013, 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.compiler.test;
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24
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25 import java.io.*;
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26 import java.lang.reflect.*;
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27
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28 import org.junit.*;
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29
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30 import com.oracle.graal.api.meta.*;
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31 import com.oracle.graal.api.meta.ProfilingInfo.TriState;
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32
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33 /**
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34 * Tests profiling information provided by the runtime.
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35 * <p>
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36 * NOTE: These tests are actually not very robust. The problem is that only partial profiling
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37 * information may be gathered for any given method. For example, HotSpot's advanced compilation
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38 * policy can decide to only gather partial profiles in a first level compilation (see
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39 * AdvancedThresholdPolicy::common(...) in advancedThresholdPolicy.cpp). Because of this,
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40 * occasionally tests for {@link ProfilingInfo#getNullSeen(int)} can fail since HotSpot only set's
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41 * the null_seen bit when doing full profiling.
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42 */
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43 public class ProfilingInfoTest extends GraalCompilerTest {
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44
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45 private static final int N = 10;
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46 private static final double DELTA = 1d / Integer.MAX_VALUE;
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47
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48 @Test
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49 public void testBranchTakenProbability() {
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50 ProfilingInfo info = profile("branchProbabilitySnippet", 0);
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51 Assert.assertEquals(0.0, info.getBranchTakenProbability(1), DELTA);
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52 Assert.assertEquals(N, info.getExecutionCount(1));
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53 Assert.assertEquals(-1.0, info.getBranchTakenProbability(8), DELTA);
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54 Assert.assertEquals(0, info.getExecutionCount(8));
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55
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56 info = profile("branchProbabilitySnippet", 1);
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57 Assert.assertEquals(1.0, info.getBranchTakenProbability(1), DELTA);
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58 Assert.assertEquals(N, info.getExecutionCount(1));
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59 Assert.assertEquals(0.0, info.getBranchTakenProbability(8), DELTA);
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60 Assert.assertEquals(N, info.getExecutionCount(8));
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61
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62 info = profile("branchProbabilitySnippet", 2);
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63 Assert.assertEquals(1.0, info.getBranchTakenProbability(1), DELTA);
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64 Assert.assertEquals(N, info.getExecutionCount(1));
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65 Assert.assertEquals(1.0, info.getBranchTakenProbability(8), DELTA);
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66 Assert.assertEquals(N, info.getExecutionCount(8));
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67
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68 continueProfiling(3 * N, "branchProbabilitySnippet", 0);
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69 Assert.assertEquals(0.25, info.getBranchTakenProbability(1), DELTA);
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70 Assert.assertEquals(4 * N, info.getExecutionCount(1));
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71 Assert.assertEquals(1.0, info.getBranchTakenProbability(8), DELTA);
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72 Assert.assertEquals(N, info.getExecutionCount(8));
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73
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74 resetProfile("branchProbabilitySnippet");
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75 Assert.assertEquals(-1.0, info.getBranchTakenProbability(1), DELTA);
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76 Assert.assertEquals(0, info.getExecutionCount(1));
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77 Assert.assertEquals(-1.0, info.getBranchTakenProbability(8), DELTA);
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78 Assert.assertEquals(0, info.getExecutionCount(8));
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79 }
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80
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81 public static int branchProbabilitySnippet(int value) {
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82 if (value == 0) {
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83 return -1;
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84 } else if (value == 1) {
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85 return -2;
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86 } else {
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87 return -3;
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88 }
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89 }
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90
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91 @Test
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92 public void testSwitchProbabilities() {
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93 ProfilingInfo info = profile("switchProbabilitySnippet", 0);
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94 Assert.assertArrayEquals(new double[]{1.0, 0.0, 0.0}, info.getSwitchProbabilities(1), DELTA);
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95
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96 info = profile("switchProbabilitySnippet", 1);
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97 Assert.assertArrayEquals(new double[]{0.0, 1.0, 0.0}, info.getSwitchProbabilities(1), DELTA);
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98
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99 info = profile("switchProbabilitySnippet", 2);
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100 Assert.assertArrayEquals(new double[]{0.0, 0.0, 1.0}, info.getSwitchProbabilities(1), DELTA);
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101
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102 resetProfile("switchProbabilitySnippet");
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103 Assert.assertNull(info.getSwitchProbabilities(1));
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104 }
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105
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106 public static int switchProbabilitySnippet(int value) {
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107 switch (value) {
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108 case 0:
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109 return -1;
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110 case 1:
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111 return -2;
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112 default:
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113 return -3;
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114 }
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115 }
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116
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117 @Test
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118 public void testProfileInvokeVirtual() {
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119 testTypeProfile("invokeVirtualSnippet", 1);
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120 }
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121
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122 public static int invokeVirtualSnippet(Object obj) {
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123 return obj.hashCode();
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124 }
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125
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126 @Test
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127 public void testTypeProfileInvokeInterface() {
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128 testTypeProfile("invokeInterfaceSnippet", 1);
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129 }
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130
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131 public static int invokeInterfaceSnippet(CharSequence a) {
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132 return a.length();
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133 }
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134
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135 @Test
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136 public void testTypeProfileCheckCast() {
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137 testTypeProfile("checkCastSnippet", 1);
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138 }
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139
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140 public static Serializable checkCastSnippet(Object obj) {
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141 try {
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142 return (Serializable) obj;
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143 } catch (ClassCastException e) {
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144 return null;
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145 }
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146 }
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147
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148 @Test
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149 public void testTypeProfileInstanceOf() {
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150 testTypeProfile("instanceOfSnippet", 1);
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151 }
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152
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153 public static boolean instanceOfSnippet(Object obj) {
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154 return obj instanceof Serializable;
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155 }
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156
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157 private void testTypeProfile(String testSnippet, int bci) {
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158 ResolvedJavaType stringType = getMetaAccess().lookupJavaType(String.class);
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159 ResolvedJavaType stringBuilderType = getMetaAccess().lookupJavaType(StringBuilder.class);
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160
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161 ProfilingInfo info = profile(testSnippet, "ABC");
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162 JavaTypeProfile typeProfile = info.getTypeProfile(bci);
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163 Assert.assertEquals(0.0, typeProfile.getNotRecordedProbability(), DELTA);
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164 Assert.assertEquals(1, typeProfile.getTypes().length);
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165 Assert.assertEquals(stringType, typeProfile.getTypes()[0].getType());
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166 Assert.assertEquals(1.0, typeProfile.getTypes()[0].getProbability(), DELTA);
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167
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168 continueProfiling(testSnippet, new StringBuilder());
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169 typeProfile = info.getTypeProfile(bci);
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170 Assert.assertEquals(0.0, typeProfile.getNotRecordedProbability(), DELTA);
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171 Assert.assertEquals(2, typeProfile.getTypes().length);
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172 Assert.assertEquals(stringType, typeProfile.getTypes()[0].getType());
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173 Assert.assertEquals(stringBuilderType, typeProfile.getTypes()[1].getType());
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174 Assert.assertEquals(0.5, typeProfile.getTypes()[0].getProbability(), DELTA);
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175 Assert.assertEquals(0.5, typeProfile.getTypes()[1].getProbability(), DELTA);
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176
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177 resetProfile(testSnippet);
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178 typeProfile = info.getTypeProfile(bci);
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179 Assert.assertNull(typeProfile);
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180 }
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181
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182 @Test
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183 public void testExceptionSeen() {
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184 // NullPointerException
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185 ProfilingInfo info = profile("nullPointerExceptionSnippet", 5);
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186 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(1));
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187
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188 info = profile("nullPointerExceptionSnippet", (Object) null);
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189 Assert.assertEquals(TriState.TRUE, info.getExceptionSeen(1));
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190
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191 resetProfile("nullPointerExceptionSnippet");
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192 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(1));
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193
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194 // ArrayOutOfBoundsException
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195 info = profile("arrayIndexOutOfBoundsExceptionSnippet", new int[1]);
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196 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(2));
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197
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198 info = profile("arrayIndexOutOfBoundsExceptionSnippet", new int[0]);
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199 Assert.assertEquals(TriState.TRUE, info.getExceptionSeen(2));
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200
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201 resetProfile("arrayIndexOutOfBoundsExceptionSnippet");
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202 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(2));
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203
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204 // CheckCastException
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205 info = profile("checkCastExceptionSnippet", "ABC");
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206 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(1));
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207
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208 info = profile("checkCastExceptionSnippet", 5);
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209 Assert.assertEquals(TriState.TRUE, info.getExceptionSeen(1));
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210
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diff changeset
211 resetProfile("checkCastExceptionSnippet");
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diff changeset
212 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(1));
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213
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214 // Invoke with exception
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215 info = profile("invokeWithExceptionSnippet", false);
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diff changeset
216 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(1));
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217
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218 info = profile("invokeWithExceptionSnippet", true);
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diff changeset
219 Assert.assertEquals(TriState.TRUE, info.getExceptionSeen(1));
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220
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diff changeset
221 resetProfile("invokeWithExceptionSnippet");
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diff changeset
222 Assert.assertEquals(TriState.FALSE, info.getExceptionSeen(1));
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223 }
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224
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225 public static int nullPointerExceptionSnippet(Object obj) {
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226 try {
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diff changeset
227 return obj.hashCode();
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diff changeset
228 } catch (NullPointerException e) {
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229 return 1;
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230 }
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231 }
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232
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diff changeset
233 public static int arrayIndexOutOfBoundsExceptionSnippet(int[] array) {
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diff changeset
234 try {
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235 return array[0];
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236 } catch (ArrayIndexOutOfBoundsException e) {
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237 return 1;
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238 }
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239 }
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240
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241 public static int checkCastExceptionSnippet(Object obj) {
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diff changeset
242 try {
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243 return ((String) obj).length();
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diff changeset
244 } catch (ClassCastException e) {
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diff changeset
245 return 1;
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diff changeset
246 }
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diff changeset
247 }
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248
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249 public static int invokeWithExceptionSnippet(boolean doThrow) {
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250 try {
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251 return throwException(doThrow);
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252 } catch (IllegalArgumentException e) {
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253 return 1;
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254 }
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255 }
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256
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257 private static int throwException(boolean doThrow) {
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258 if (doThrow) {
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259 throw new IllegalArgumentException();
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260 } else {
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261 return 1;
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262 }
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263 }
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264
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diff changeset
265 @Test
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266 public void testNullSeen() {
9926
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267 testNullSeen("instanceOfSnippet");
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268 testNullSeen("checkCastSnippet");
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269 }
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270
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271 private void testNullSeen(String snippet) {
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272 ProfilingInfo info = profile(snippet, 1);
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273 Assert.assertEquals(TriState.FALSE, info.getNullSeen(1));
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274
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275 continueProfiling(snippet, "ABC");
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276 Assert.assertEquals(TriState.FALSE, info.getNullSeen(1));
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277
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278 continueProfiling(snippet, new Object());
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279 Assert.assertEquals(TriState.FALSE, info.getNullSeen(1));
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280
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281 if (TriState.TRUE == info.getNullSeen(1)) {
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282 // See the javadoc comment for ProfilingInfoTest.
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283 continueProfiling(snippet, (Object) null);
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284 Assert.assertEquals(TriState.TRUE, info.getNullSeen(1));
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285
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286 continueProfiling(snippet, 0.0);
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287 Assert.assertEquals(TriState.TRUE, info.getNullSeen(1));
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288
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289 continueProfiling(snippet, new Object());
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290 Assert.assertEquals(TriState.TRUE, info.getNullSeen(1));
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291 }
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292
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293 resetProfile(snippet);
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294 Assert.assertEquals(TriState.FALSE, info.getNullSeen(1));
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295 }
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296
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297 private ProfilingInfo profile(String methodName, Object... args) {
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298 return profile(true, N, methodName, args);
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299 }
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300
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301 private void continueProfiling(String methodName, Object... args) {
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302 profile(false, N, methodName, args);
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303 }
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304
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305 private void continueProfiling(int executions, String methodName, Object... args) {
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306 profile(false, executions, methodName, args);
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307 }
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308
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309 private ProfilingInfo profile(boolean resetProfile, int executions, String methodName, Object... args) {
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310 Method method = getMethod(methodName);
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311 Assert.assertTrue(Modifier.isStatic(method.getModifiers()));
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312
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313 ResolvedJavaMethod javaMethod = getMetaAccess().lookupJavaMethod(method);
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314 if (resetProfile) {
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315 javaMethod.reprofile();
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316 }
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317
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318 for (int i = 0; i < executions; ++i) {
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319 try {
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320 method.invoke(null, args);
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321 } catch (Throwable e) {
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322 Assert.fail("method should not throw an exception: " + e.toString());
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323 }
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324 }
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325
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326 ProfilingInfo info = javaMethod.getProfilingInfo();
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327 // The execution counts are low so force maturity
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328 info.setMature();
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329 return info;
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330 }
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331
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332 private void resetProfile(String methodName) {
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333 ResolvedJavaMethod javaMethod = getMetaAccess().lookupJavaMethod(getMethod(methodName));
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334 javaMethod.reprofile();
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335 }
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336 }