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annotate graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/AbstractJavaProfile.java @ 14157:8c4a3d9308a7

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fixed FindBugs bugs
author twisti
date Wed, 12 Mar 2014 12:40:45 -0700
parents 89cbd0119dc5
children f3a5036cc13c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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.api.meta;
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24
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25 import java.io.*;
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26
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27 /**
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28 * This object holds probability information for a set of items that were profiled at a specific
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29 * BCI. The precision of the supplied values may vary, but a runtime that provides this information
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30 * should be aware that it will be used to guide performance-critical decisions like speculative
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31 * inlining, etc.
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32 *
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33 * @param <T> a subclass of AbstractProfiledItem
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34 * @param <U> the class of the items that are profiled at the specific BCI and for which
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35 * probabilities are stored. E.g., a ResolvedJavaType or a ResolvedJavaMethod.
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36 */
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37 public abstract class AbstractJavaProfile<T extends AbstractProfiledItem<U>, U> implements Serializable {
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38
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39 private static final long serialVersionUID = 5493379044459116749L;
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40
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41 private final double notRecordedProbability;
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42 private final T[] pitems;
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43
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44 public AbstractJavaProfile(double notRecordedProbability, T[] pitems) {
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45 this.pitems = pitems;
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46 assert !Double.isNaN(notRecordedProbability);
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47 this.notRecordedProbability = notRecordedProbability;
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48 assert isSorted();
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49 }
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50
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51 /**
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52 * Determines if an array of profiled items are sorted in descending order of their
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53 * probabilities.
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54 */
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55 private boolean isSorted() {
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56 for (int i = 1; i < pitems.length; i++) {
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57 if (pitems[i - 1].getProbability() < pitems[i].getProbability()) {
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58 return false;
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59 }
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60 }
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61 return true;
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62 }
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63
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64 /**
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65 * Returns the estimated probability of all types that could not be recorded due to profiling
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66 * limitations.
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67 *
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68 * @return double value >= 0.0 and <= 1.0
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69 */
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70 public double getNotRecordedProbability() {
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71 return notRecordedProbability;
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72 }
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73
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74 protected T[] getItems() {
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75 return pitems;
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76 }
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77
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78 /**
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79 * Searches for an entry of a given resolved Java type.
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80 *
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81 * @param type the type for which an entry should be searched
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82 * @return the entry or null if no entry for this type can be found
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83 */
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84 public T findEntry(ResolvedJavaType type) {
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85 if (pitems != null) {
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86 for (T pt : pitems) {
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87 if (pt.getItem() == type) {
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88 return pt;
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89 }
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90 }
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91 }
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92 return null;
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93 }
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94
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95 @Override
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96 public String toString() {
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97 StringBuilder builder = new StringBuilder();
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98 builder.append(this.getClass().getName());
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99 builder.append("[");
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100 if (pitems != null) {
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101 for (T pt : pitems) {
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102 builder.append(pt.toString());
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103 builder.append(", ");
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104 }
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105 }
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106 builder.append(this.notRecordedProbability);
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107 builder.append("]");
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108 return builder.toString();
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109 }
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110
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111 public boolean isIncluded(U item) {
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112 if (this.getNotRecordedProbability() > 0.0) {
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113 return true;
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114 } else {
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115 for (int i = 0; i < getItems().length; i++) {
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116 T pitem = getItems()[i];
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117 U curType = pitem.getItem();
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118 if (curType == item) {
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119 return true;
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120 }
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121 }
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122 }
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123 return false;
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124 }
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125
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126 @Override
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127 public boolean equals(Object obj) {
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128 if (obj == this) {
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129 return true;
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130 }
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131 if (!(obj instanceof AbstractJavaProfile)) {
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132 return false;
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133 }
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134 AbstractJavaProfile that = (AbstractJavaProfile) obj;
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135 if (that.notRecordedProbability != notRecordedProbability) {
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136 return false;
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137 }
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138 if (that.pitems.length != pitems.length) {
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139 return false;
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140 }
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141 for (int i = 0; i < pitems.length; ++i) {
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142 if (!pitems[i].equals(that.pitems[i])) {
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143 return false;
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144 }
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145 }
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146 return true;
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147 }
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148
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149 @Override
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150 public int hashCode() {
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151 return (int) Double.doubleToLongBits(notRecordedProbability) + pitems.length * 13;
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152 }
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153 }