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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/PrimitiveValueProfile.java @ 22501:a63bda98cfdb

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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
author Christian Humer <christian.humer@oracle.com>
date Wed, 16 Dec 2015 16:38:13 +0100
parents dc83cc1f94f2
children
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1 /*
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2 * Copyright (c) 2014, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.utilities;
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26
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27 import com.oracle.truffle.api.CompilerDirectives;
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28 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
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29
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30 import java.util.Objects;
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31
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32 /**
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33 * @deprecated use {@link com.oracle.truffle.api.profiles.PrimitiveValueProfile} instead
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34 */
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35 @Deprecated
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36 @SuppressWarnings("deprecation")
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37 public class PrimitiveValueProfile extends ValueProfile {
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38
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39 private static final Object UNINITIALIZED = new Object();
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40 private static final Object GENERIC = new Object();
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41
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42 @CompilationFinal private Object cachedValue = UNINITIALIZED;
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43
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44 PrimitiveValueProfile() {
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45 }
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46
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47 @SuppressWarnings("unchecked")
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48 @Override
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49 public <T> T profile(T v) {
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50 Object value = v;
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51 Object snapshot = this.cachedValue;
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52 if (snapshot != GENERIC) {
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53 if (snapshot instanceof Byte) {
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54 if (value instanceof Byte && (byte) snapshot == (byte) value) {
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55 return (T) snapshot;
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56 }
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57 } else if (snapshot instanceof Short) {
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58 if (value instanceof Short && (short) snapshot == (short) value) {
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59 return (T) snapshot;
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60 }
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61 } else if (snapshot instanceof Integer) {
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62 if (value instanceof Integer && (int) snapshot == (int) value) {
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63 return (T) snapshot;
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64 }
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65 } else if (snapshot instanceof Long) {
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66 if (value instanceof Long && (long) snapshot == (long) value) {
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67 return (T) snapshot;
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68 }
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69 } else if (snapshot instanceof Float) {
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70 if (value instanceof Float && exactCompare((float) snapshot, (float) value)) {
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71 return (T) snapshot;
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72 }
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73 } else if (snapshot instanceof Double) {
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74 if (value instanceof Double && exactCompare((double) snapshot, (double) value)) {
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75 return (T) snapshot;
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76 }
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77 } else if (snapshot instanceof Boolean) {
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78 if (value instanceof Boolean && (boolean) snapshot == (boolean) value) {
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79 return (T) snapshot;
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80 }
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81 } else if (snapshot instanceof Character) {
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82 if (value instanceof Character && (char) snapshot == (char) value) {
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83 return (T) snapshot;
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84 }
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85 } else if (snapshot == value) {
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86 return (T) snapshot;
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87 }
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88 cacheMiss(value);
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89 }
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90 return (T) value;
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91 }
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92
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93 public byte profile(byte value) {
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94 Object snapshot = this.cachedValue;
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95 if (snapshot != GENERIC) {
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96 if (snapshot instanceof Byte && (byte) snapshot == value) {
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97 return (byte) snapshot;
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98 } else {
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99 cacheMiss(value);
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100 }
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101 }
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102 return value;
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103 }
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104
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105 public short profile(short value) {
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106 Object snapshot = this.cachedValue;
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107 if (snapshot != GENERIC) {
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108 if (snapshot instanceof Short && (short) snapshot == value) {
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109 return (short) snapshot;
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110 } else {
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111 cacheMiss(value);
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112 }
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113 }
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114 return value;
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115 }
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116
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117 public int profile(int value) {
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118 Object snapshot = this.cachedValue;
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119 if (snapshot != GENERIC) {
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120 if (snapshot instanceof Integer && (int) snapshot == value) {
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121 return (int) snapshot;
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122 } else {
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123 cacheMiss(value);
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124 }
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125 }
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126 return value;
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127 }
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128
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129 public long profile(long value) {
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130 Object snapshot = this.cachedValue;
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131 if (snapshot != GENERIC) {
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132 if (snapshot instanceof Long && (long) snapshot == value) {
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133 return (long) snapshot;
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134 } else {
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135 cacheMiss(value);
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136 }
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137 }
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138 return value;
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139 }
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140
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141 public float profile(float value) {
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142 Object snapshot = this.cachedValue;
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143 if (snapshot != GENERIC) {
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144 if (snapshot instanceof Float && exactCompare((float) snapshot, value)) {
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145 return (float) snapshot;
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146 } else {
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147 cacheMiss(value);
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148 }
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149 }
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150 return value;
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151 }
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152
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153 public double profile(double value) {
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154 Object snapshot = this.cachedValue;
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155 if (snapshot != GENERIC) {
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156 if (snapshot instanceof Double && exactCompare((double) snapshot, value)) {
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157 return (double) snapshot;
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158 } else {
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159 cacheMiss(value);
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160 }
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161 }
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162 return value;
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163 }
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164
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165 public boolean profile(boolean value) {
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166 Object snapshot = this.cachedValue;
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167 if (snapshot != GENERIC) {
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168 if (snapshot instanceof Boolean && (boolean) snapshot == value) {
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169 return (boolean) snapshot;
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170 } else {
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171 cacheMiss(value);
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172 }
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173 }
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174 return value;
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175 }
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176
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177 public char profile(char value) {
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178 Object snapshot = this.cachedValue;
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179 if (snapshot != GENERIC) {
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180 if (snapshot instanceof Character && (char) snapshot == value) {
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181 return (char) snapshot;
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182 } else {
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183 cacheMiss(value);
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184 }
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185 }
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186 return value;
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187 }
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188
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189 public boolean isGeneric() {
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190 return cachedValue == GENERIC;
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191 }
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192
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193 public boolean isUninitialized() {
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194 return cachedValue == UNINITIALIZED;
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195 }
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196
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197 public Object getCachedValue() {
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198 return cachedValue;
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199 }
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200
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201 @Override
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202 public String toString() {
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203 return String.format("%s(%s)@%x", getClass().getSimpleName(), formatValue(), hashCode());
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204 }
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205
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206 private void cacheMiss(Object value) {
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207 // TODO should we try to handle this more atomically?
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208 CompilerDirectives.transferToInterpreterAndInvalidate();
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209 if (cachedValue == UNINITIALIZED) {
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210 cachedValue = value;
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211 } else {
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212 cachedValue = GENERIC;
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213 }
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214 }
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215
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216 public static boolean exactCompare(float a, float b) {
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217 /*
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218 * -0.0 == 0.0, but you can tell the difference through other means, so we need to
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219 * differentiate.
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220 */
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221 return Float.floatToRawIntBits(a) == Float.floatToRawIntBits(b);
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222 }
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223
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224 public static boolean exactCompare(double a, double b) {
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225 /*
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226 * -0.0 == 0.0, but you can tell the difference through other means, so we need to
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parents:
diff changeset
227 * differentiate.
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Chris Seaton <chris.seaton@oracle.com>
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diff changeset
228 */
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229 return Double.doubleToRawLongBits(a) == Double.doubleToRawLongBits(b);
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230 }
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231
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Chris Seaton <chris.seaton@oracle.com>
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diff changeset
232 private String formatValue() {
19592
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233 Object snapshot = this.cachedValue;
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diff changeset
234 if (snapshot == null) {
18164
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235 return "null";
19592
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236 } else if (snapshot == UNINITIALIZED) {
18164
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237 return "uninitialized";
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238 } else if (snapshot == GENERIC) {
18164
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diff changeset
239 return "generic";
19592
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diff changeset
240 } else if (snapshot instanceof Byte || snapshot instanceof Short || snapshot instanceof Integer || snapshot instanceof Long || snapshot instanceof Float || snapshot instanceof Double ||
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diff changeset
241 snapshot instanceof Boolean || snapshot instanceof Character) {
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diff changeset
242 return String.format("%s=%s", snapshot.getClass().getSimpleName(), snapshot);
18164
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parents:
diff changeset
243 } else {
19592
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244 return String.format("%s@%x", snapshot.getClass().getSimpleName(), Objects.hash(snapshot));
18164
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diff changeset
245 }
53afdc71b311 Truffle: added PrimitiveValueProfile.
Chris Seaton <chris.seaton@oracle.com>
parents:
diff changeset
246 }
53afdc71b311 Truffle: added PrimitiveValueProfile.
Chris Seaton <chris.seaton@oracle.com>
parents:
diff changeset
247 }