Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/AbstractJavaProfile.java @ 24155:88bd5f7522a1 jvmci-0.30
update hgignore and undo change to hotspot/.project
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 07 Jul 2017 15:08:58 +0200 |
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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 jdk.vm.ci.meta; |
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24 |
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25 /** |
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26 * This object holds probability information for a set of items that were profiled at a specific |
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27 * BCI. The precision of the supplied values may vary, but a runtime that provides this information |
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28 * should be aware that it will be used to guide performance-critical decisions like speculative |
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29 * inlining, etc. |
14906 | 30 * |
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31 * @param <T> a subclass of AbstractProfiledItem |
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32 * @param <U> the class of the items that are profiled at the specific BCI and for which |
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33 * probabilities are stored. E.g., a ResolvedJavaType or a ResolvedJavaMethod. |
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34 */ |
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35 public abstract class AbstractJavaProfile<T extends AbstractProfiledItem<U>, U> { |
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36 |
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37 private final double notRecordedProbability; |
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38 private final T[] pitems; |
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39 |
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40 /** |
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41 * |
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42 * @param notRecordedProbability |
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43 * @param pitems |
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44 */ |
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45 @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of the `pitems` array parameter") |
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46 public AbstractJavaProfile(double notRecordedProbability, T[] pitems) { |
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47 this.pitems = pitems; |
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49 this.notRecordedProbability = notRecordedProbability; |
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50 assert isSorted(); |
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51 assert totalProbablility() >= 0 && totalProbablility() <= 1.0001 : totalProbablility() + " " + this; |
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52 } |
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53 |
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54 private double totalProbablility() { |
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55 double total = notRecordedProbability; |
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56 for (T item : pitems) { |
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57 total += item.probability; |
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58 } |
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59 return total; |
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60 } |
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61 |
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62 /** |
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63 * Determines if an array of profiled items are sorted in descending order of their |
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64 * probabilities. |
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65 */ |
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66 private boolean isSorted() { |
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67 for (int i = 1; i < pitems.length; i++) { |
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68 if (pitems[i - 1].getProbability() < pitems[i].getProbability()) { |
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69 return false; |
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70 } |
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71 } |
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72 return true; |
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73 } |
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74 |
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75 /** |
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76 * Returns the estimated probability of all types that could not be recorded due to profiling |
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77 * limitations. |
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79 * @return double value ≥ 0.0 and ≤ 1.0 | |
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80 */ |
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81 public double getNotRecordedProbability() { |
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82 return notRecordedProbability; |
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83 } |
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84 |
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85 protected T[] getItems() { |
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86 return pitems; |
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87 } |
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88 |
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89 /** |
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90 * Searches for an entry of a given resolved Java type. |
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92 * @param type the type for which an entry should be searched |
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93 * @return the entry or null if no entry for this type can be found |
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94 */ |
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95 public T findEntry(ResolvedJavaType type) { |
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96 if (pitems != null) { |
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97 for (T pt : pitems) { |
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98 if (pt.getItem().equals(type)) { |
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99 return pt; |
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100 } |
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101 } |
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102 } |
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103 return null; |
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104 } |
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105 |
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106 @Override |
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107 public String toString() { |
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108 StringBuilder builder = new StringBuilder(); |
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109 builder.append(this.getClass().getName()); |
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110 builder.append("["); |
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111 if (pitems != null) { |
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112 for (T pt : pitems) { |
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113 builder.append(pt.toString()); |
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114 builder.append(", "); |
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115 } |
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116 } |
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117 builder.append(this.notRecordedProbability); |
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118 builder.append("]"); |
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119 return builder.toString(); |
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120 } |
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121 |
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122 public boolean isIncluded(U item) { |
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123 if (this.getNotRecordedProbability() > 0.0) { |
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124 return true; |
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125 } else { |
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126 for (int i = 0; i < getItems().length; i++) { |
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127 T pitem = getItems()[i]; |
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128 U curType = pitem.getItem(); |
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129 if (curType == item) { |
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130 return true; |
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131 } |
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132 } |
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133 } |
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134 return false; |
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135 } |
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136 |
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137 @Override |
14157 | 138 public boolean equals(Object obj) { |
139 if (obj == this) { | |
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140 return true; |
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141 } |
14157 | 142 if (!(obj instanceof AbstractJavaProfile)) { |
143 return false; | |
144 } | |
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145 AbstractJavaProfile<?, ?> that = (AbstractJavaProfile<?, ?>) obj; |
14157 | 146 if (that.notRecordedProbability != notRecordedProbability) { |
147 return false; | |
148 } | |
149 if (that.pitems.length != pitems.length) { | |
150 return false; | |
151 } | |
152 for (int i = 0; i < pitems.length; ++i) { | |
153 if (!pitems[i].equals(that.pitems[i])) { | |
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154 return false; |
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155 } |
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156 } |
14157 | 157 return true; |
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158 } |
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159 |
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160 @Override |
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161 public int hashCode() { |
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162 return (int) Double.doubleToLongBits(notRecordedProbability) + pitems.length * 13; |
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163 } |
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164 } |