Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/ProfilingInfo.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) 2012, 2012, 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 * Provides access to the profiling information of one specific method. Every accessor method |
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27 * returns the information that is available at the time of invocation. If a method is invoked |
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28 * multiple times, it may return significantly different results for every invocation as the |
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29 * profiling information may be changed by other Java threads at any time. |
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30 */ |
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31 public interface ProfilingInfo { |
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32 |
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33 /** |
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34 * Returns the length of the bytecodes associated with this profile. |
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35 */ |
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36 int getCodeSize(); |
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37 |
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38 /** |
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39 * Returns an estimate of how often the branch at the given byte code was taken. |
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40 * |
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41 * @return The estimated probability, with 0.0 meaning never and 1.0 meaning always, or -1 if |
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42 * this information is not available. |
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43 */ |
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44 double getBranchTakenProbability(int bci); |
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45 |
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46 /** |
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47 * Returns an estimate of how often the switch cases are taken at the given BCI. The default |
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48 * case is stored as the last entry. |
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49 * |
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50 * @return A double value that contains the estimated probabilities, with 0.0 meaning never and |
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51 * 1.0 meaning always, or -1 if this information is not available. |
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52 */ |
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53 double[] getSwitchProbabilities(int bci); |
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54 |
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55 /** |
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56 * Returns the TypeProfile for the given BCI. |
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57 * |
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58 * @return Returns a JavaTypeProfile object, or null if not available. |
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59 */ |
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60 JavaTypeProfile getTypeProfile(int bci); |
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61 |
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62 /** |
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63 * Returns the MethodProfile for the given BCI. |
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64 * |
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65 * @return Returns a JavaMethodProfile object, or null if not available. |
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66 */ |
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67 JavaMethodProfile getMethodProfile(int bci); |
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68 |
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69 /** |
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70 * Returns information if the given BCI did ever throw an exception. |
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71 * |
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72 * @return {@link TriState#TRUE} if the instruction has thrown an exception at least once, |
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73 * {@link TriState#FALSE} if it never threw an exception, and {@link TriState#UNKNOWN} |
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74 * if this information was not recorded. |
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75 */ |
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76 TriState getExceptionSeen(int bci); |
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77 |
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78 /** |
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79 * Returns information if null was ever seen for the given BCI. This information is collected |
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80 * for the aastore, checkcast and instanceof bytecodes. |
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81 * |
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82 * @return {@link TriState#TRUE} if null was seen for the instruction, {@link TriState#FALSE} if |
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83 * null was NOT seen, and {@link TriState#UNKNOWN} if this information was not recorded. |
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84 */ |
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85 TriState getNullSeen(int bci); |
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86 |
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87 /** |
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88 * Returns an estimate how often the current BCI was executed. Avoid comparing execution counts |
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89 * to each other, as the returned value highly depends on the time of invocation. |
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90 * |
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91 * @return the estimated execution count or -1 if not available. |
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92 */ |
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93 int getExecutionCount(int bci); |
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94 |
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95 /** |
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96 * Returns how frequently a method was deoptimized for the given deoptimization reason. This |
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97 * only indicates how often the method did fall back to the interpreter for the execution and |
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98 * does not indicate how often it was recompiled. |
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99 * |
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100 * @param reason the reason for which the number of deoptimizations should be queried |
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101 * @return the number of times the compiled method deoptimized for the given reason. |
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102 */ |
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103 int getDeoptimizationCount(DeoptimizationReason reason); |
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104 |
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105 /** |
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106 * Records the size of the compiler intermediate representation (IR) associated with this |
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107 * method. |
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108 * |
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109 * @param irType the IR type for which the size is being recorded |
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110 * @param irSize the IR size to be recorded. The unit depends on the IR. |
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111 * @return whether recording this information for {@code irType} is supported |
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112 */ |
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113 boolean setCompilerIRSize(Class<?> irType, int irSize); |
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114 |
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115 /** |
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116 * Gets the size of the compiler intermediate representation (IR) associated with this method |
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117 * last recorded by {@link #setCompilerIRSize(Class, int)}. |
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118 * |
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119 * @param irType the IR type for which the size is being requested |
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120 * @return the requested IR size or -1 if it is unavailable for {@code irType} |
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121 */ |
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122 int getCompilerIRSize(Class<?> irType); |
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123 |
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124 /** |
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125 * Returns true if the profiling information can be assumed as sufficiently accurate. |
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126 * |
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127 * @return true if the profiling information was recorded often enough mature enough, false |
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128 * otherwise. |
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129 */ |
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130 boolean isMature(); |
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131 |
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132 /** |
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133 * Force data to be treated as mature if possible. |
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134 */ |
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135 void setMature(); |
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136 |
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137 /** |
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138 * Formats this profiling information to a string. |
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139 * |
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140 * @param method an optional method that augments the profile string returned |
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141 * @param sep the separator to use for each separate profile record |
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142 */ |
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143 default String toString(ResolvedJavaMethod method, String sep) { |
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144 StringBuilder buf = new StringBuilder(100); |
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145 if (method != null) { |
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146 buf.append(String.format("canBeStaticallyBound: %b%s", method.canBeStaticallyBound(), sep)); |
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147 } |
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148 for (int i = 0; i < getCodeSize(); i++) { |
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149 if (getExecutionCount(i) != -1) { |
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150 buf.append(String.format("executionCount@%d: %d%s", i, getExecutionCount(i), sep)); |
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151 } |
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152 |
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153 if (getBranchTakenProbability(i) != -1) { |
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154 buf.append(String.format("branchProbability@%d: %.6f%s", i, getBranchTakenProbability(i), sep)); |
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155 } |
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156 |
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157 double[] switchProbabilities = getSwitchProbabilities(i); |
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158 if (switchProbabilities != null) { |
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159 buf.append(String.format("switchProbabilities@%d:", i)); |
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160 for (int j = 0; j < switchProbabilities.length; j++) { |
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161 buf.append(String.format(" %.6f", switchProbabilities[j])); |
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162 } |
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163 buf.append(sep); |
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164 } |
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165 |
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166 if (getExceptionSeen(i) != TriState.UNKNOWN) { |
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167 buf.append(String.format("exceptionSeen@%d: %s%s", i, getExceptionSeen(i).name(), sep)); |
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168 } |
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169 |
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170 if (getNullSeen(i) != TriState.UNKNOWN) { |
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171 buf.append(String.format("nullSeen@%d: %s%s", i, getNullSeen(i).name(), sep)); |
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172 } |
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173 |
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174 JavaTypeProfile typeProfile = getTypeProfile(i); |
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175 MetaUtil.appendProfile(buf, typeProfile, i, "types", sep); |
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176 |
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177 JavaMethodProfile methodProfile = getMethodProfile(i); |
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178 MetaUtil.appendProfile(buf, methodProfile, i, "methods", sep); |
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179 } |
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180 |
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181 boolean firstDeoptReason = true; |
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182 for (DeoptimizationReason reason : DeoptimizationReason.values()) { |
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183 int count = getDeoptimizationCount(reason); |
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184 if (count > 0) { |
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185 if (firstDeoptReason) { |
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186 buf.append("deoptimization history").append(sep); |
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187 firstDeoptReason = false; |
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188 } |
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189 buf.append(String.format(" %s: %d%s", reason.name(), count, sep)); |
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190 } |
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191 } |
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192 if (buf.length() == 0) { |
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193 return ""; |
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194 } |
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195 String s = buf.toString(); |
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196 return s.substring(0, s.length() - sep.length()); |
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197 } |
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198 |
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199 } |