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annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/MetaUtil.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/MetaUtil.java@f137f1974f60
children
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1 /*
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2 * Copyright (c) 2012, 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.
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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.jvmci.meta;
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24
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25 import java.io.*;
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26 import java.util.*;
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27
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28 /**
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29 * Miscellaneous collection of utility methods used by {@code com.oracle.jvmci.meta} and its
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30 * clients.
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31 */
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32 public class MetaUtil {
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33
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34 private static class ClassInfo {
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35 public long totalSize;
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36 public long instanceCount;
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37
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38 @Override
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39 public String toString() {
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40 return "totalSize=" + totalSize + ", instanceCount=" + instanceCount;
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41 }
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42 }
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43
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44 /**
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45 * Returns the number of bytes occupied by this constant value or constant object and
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46 * recursively all values reachable from this value.
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47 *
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48 * @param constant the constant whose bytes should be measured
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49 * @param printTopN print total size and instance count of the top n classes is desired
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50 * @return the number of bytes occupied by this constant
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51 */
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52 public static long getMemorySizeRecursive(MetaAccessProvider access, ConstantReflectionProvider constantReflection, JavaConstant constant, PrintStream out, int printTopN) {
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53 Set<JavaConstant> marked = new HashSet<>();
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54 Deque<JavaConstant> stack = new ArrayDeque<>();
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55 if (constant.getKind() == Kind.Object && constant.isNonNull()) {
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56 marked.add(constant);
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57 }
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58 final HashMap<ResolvedJavaType, ClassInfo> histogram = new HashMap<>();
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59 stack.push(constant);
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60 long sum = 0;
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61 while (!stack.isEmpty()) {
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62 JavaConstant c = stack.pop();
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63 long memorySize = access.getMemorySize(constant);
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64 sum += memorySize;
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65 if (c.getKind() == Kind.Object && c.isNonNull()) {
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66 ResolvedJavaType clazz = access.lookupJavaType(c);
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67 if (!histogram.containsKey(clazz)) {
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68 histogram.put(clazz, new ClassInfo());
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69 }
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70 ClassInfo info = histogram.get(clazz);
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71 info.instanceCount++;
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72 info.totalSize += memorySize;
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73 ResolvedJavaType type = access.lookupJavaType(c);
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74 if (type.isArray()) {
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75 if (!type.getComponentType().isPrimitive()) {
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76 int length = constantReflection.readArrayLength(c);
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77 for (int i = 0; i < length; i++) {
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78 JavaConstant value = constantReflection.readArrayElement(c, i);
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79 pushConstant(marked, stack, value);
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80 }
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81 }
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82 } else {
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83 ResolvedJavaField[] instanceFields = type.getInstanceFields(true);
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84 for (ResolvedJavaField f : instanceFields) {
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85 if (f.getKind() == Kind.Object) {
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86 JavaConstant value = constantReflection.readFieldValue(f, c);
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87 pushConstant(marked, stack, value);
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88 }
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89 }
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90 }
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91 }
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92 }
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93 ArrayList<ResolvedJavaType> clazzes = new ArrayList<>();
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94 clazzes.addAll(histogram.keySet());
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95 Collections.sort(clazzes, new Comparator<ResolvedJavaType>() {
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96
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97 @Override
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98 public int compare(ResolvedJavaType o1, ResolvedJavaType o2) {
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99 long l1 = histogram.get(o1).totalSize;
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100 long l2 = histogram.get(o2).totalSize;
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101 if (l1 > l2) {
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102 return -1;
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103 } else if (l1 == l2) {
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104 return 0;
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105 } else {
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106 return 1;
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107 }
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108 }
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109 });
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110
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111 int z = 0;
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112 for (ResolvedJavaType c : clazzes) {
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113 if (z > printTopN) {
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114 break;
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115 }
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116 out.println("Class " + c + ", " + histogram.get(c));
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117 ++z;
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118 }
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119
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120 return sum;
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121 }
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122
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123 private static void pushConstant(Set<JavaConstant> marked, Deque<JavaConstant> stack, JavaConstant value) {
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124 if (value.isNonNull()) {
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125 if (!marked.contains(value)) {
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126 marked.add(value);
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127 stack.push(value);
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128 }
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129 }
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130 }
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131
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132 /**
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133 * Calls {@link JavaType#resolve(ResolvedJavaType)} on an array of types.
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134 */
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135 public static ResolvedJavaType[] resolveJavaTypes(JavaType[] types, ResolvedJavaType accessingClass) {
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136 ResolvedJavaType[] result = new ResolvedJavaType[types.length];
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137 for (int i = 0; i < result.length; i++) {
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138 result[i] = types[i].resolve(accessingClass);
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139 }
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140 return result;
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141 }
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142
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143 /**
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144 * Extends the functionality of {@link Class#getSimpleName()} to include a non-empty string for
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145 * anonymous and local classes.
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146 *
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147 * @param clazz the class for which the simple name is being requested
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148 * @param withEnclosingClass specifies if the returned name should be qualified with the name(s)
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149 * of the enclosing class/classes of {@code clazz} (if any). This option is ignored
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150 * if {@code clazz} denotes an anonymous or local class.
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151 * @return the simple name
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152 */
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153 public static String getSimpleName(Class<?> clazz, boolean withEnclosingClass) {
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154 final String simpleName = clazz.getSimpleName();
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155 if (simpleName.length() != 0) {
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156 if (withEnclosingClass) {
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157 String prefix = "";
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158 Class<?> enclosingClass = clazz;
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159 while ((enclosingClass = enclosingClass.getEnclosingClass()) != null) {
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160 prefix = enclosingClass.getSimpleName() + "." + prefix;
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161 }
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162 return prefix + simpleName;
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163 }
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164 return simpleName;
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165 }
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166 // Must be an anonymous or local class
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167 final String name = clazz.getName();
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168 int index = name.indexOf('$');
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169 if (index == -1) {
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170 return name;
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171 }
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172 index = name.lastIndexOf('.', index);
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173 if (index == -1) {
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174 return name;
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175 }
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176 return name.substring(index + 1);
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177 }
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178
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179 static String internalNameToJava(String name, boolean qualified, boolean classForNameCompatible) {
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180 switch (name.charAt(0)) {
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181 case 'L': {
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182 String result = name.substring(1, name.length() - 1).replace('/', '.');
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183 if (!qualified) {
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184 final int lastDot = result.lastIndexOf('.');
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185 if (lastDot != -1) {
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186 result = result.substring(lastDot + 1);
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187 }
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188 }
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189 return result;
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190 }
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191 case '[':
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192 return classForNameCompatible ? name.replace('/', '.') : internalNameToJava(name.substring(1), qualified, classForNameCompatible) + "[]";
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193 default:
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194 if (name.length() != 1) {
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195 throw new IllegalArgumentException("Illegal internal name: " + name);
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196 }
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197 return Kind.fromPrimitiveOrVoidTypeChar(name.charAt(0)).getJavaName();
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198 }
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199 }
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200
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201 /**
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202 * Turns an class name in internal format into a resolved Java type.
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203 */
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204 public static ResolvedJavaType classForName(String internal, MetaAccessProvider metaAccess, ClassLoader cl) {
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205 Kind k = Kind.fromTypeString(internal);
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206 try {
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207 String n = internalNameToJava(internal, true, true);
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208 return metaAccess.lookupJavaType(k.isPrimitive() ? k.toJavaClass() : Class.forName(n, true, cl));
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209 } catch (ClassNotFoundException cnfe) {
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210 throw new IllegalArgumentException("could not instantiate class described by " + internal, cnfe);
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211 }
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212 }
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213
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diff changeset
214 /**
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215 * Convenient shortcut for calling
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parents: 16488
diff changeset
216 * {@link #appendLocation(StringBuilder, ResolvedJavaMethod, int)} without having to supply a
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217 * {@link StringBuilder} instance and convert the result to a string.
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218 */
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219 public static String toLocation(ResolvedJavaMethod method, int bci) {
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220 return appendLocation(new StringBuilder(), method, bci).toString();
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221 }
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222
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223 /**
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224 * Appends a string representation of a location specified by a given method and bci to a given
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225 * {@link StringBuilder}. If a stack trace element with a non-null file name and non-negative
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226 * line number is {@linkplain ResolvedJavaMethod#asStackTraceElement(int) available} for the
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227 * given method, then the string returned is the {@link StackTraceElement#toString()} value of
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228 * the stack trace element, suffixed by the bci location. For example:
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229 *
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230 * <pre>
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231 * java.lang.String.valueOf(String.java:2930) [bci: 12]
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232 * </pre>
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233 *
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234 * Otherwise, the string returned is the value of applying {@link JavaMethod#format(String)}
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235 * with the format string {@code "%H.%n(%p)"}, suffixed by the bci location. For example:
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236 *
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237 * <pre>
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238 * java.lang.String.valueOf(int) [bci: 12]
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239 * </pre>
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240 *
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241 * @param sb
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242 * @param method
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243 * @param bci
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244 */
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245 public static StringBuilder appendLocation(StringBuilder sb, ResolvedJavaMethod method, int bci) {
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246 if (method != null) {
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247 StackTraceElement ste = method.asStackTraceElement(bci);
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248 if (ste.getFileName() != null && ste.getLineNumber() > 0) {
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249 sb.append(ste);
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250 } else {
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251 sb.append(method.format("%H.%n(%p)"));
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252 }
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253 } else {
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254 sb.append("Null method");
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255 }
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256 return sb.append(" [bci: ").append(bci).append(']');
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257 }
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258
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259 static void appendProfile(StringBuilder buf, AbstractJavaProfile<?, ?> profile, int bci, String type, String sep) {
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260 if (profile != null) {
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261 AbstractProfiledItem<?>[] pitems = profile.getItems();
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262 if (pitems != null) {
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263 buf.append(String.format("%s@%d:", type, bci));
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264 for (int j = 0; j < pitems.length; j++) {
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265 AbstractProfiledItem<?> pitem = pitems[j];
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266 buf.append(String.format(" %.6f (%s)%s", pitem.getProbability(), pitem.getItem(), sep));
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267 }
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268 if (profile.getNotRecordedProbability() != 0) {
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269 buf.append(String.format(" %.6f <other %s>%s", profile.getNotRecordedProbability(), type, sep));
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270 } else {
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271 buf.append(String.format(" <no other %s>%s", type, sep));
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272 }
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273 }
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274 }
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275 }
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276
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277 /**
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278 * Converts a Java source-language class name into the internal form.
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279 *
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280 * @param className the class name
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281 * @return the internal name form of the class name
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282 */
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283 public static String toInternalName(String className) {
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284 String prefix = "";
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285 String base = className;
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286 while (base.endsWith("[]")) {
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287 prefix += "[";
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288 base = base.substring(base.length() - 2);
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289 }
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290
16726
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291 switch (className) {
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292 case "boolean":
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293 return prefix + "Z";
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294 case "byte":
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295 return prefix + "B";
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296 case "short":
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297 return prefix + "S";
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298 case "char":
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299 return prefix + "C";
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300 case "int":
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301 return prefix + "I";
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302 case "float":
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303 return prefix + "F";
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304 case "long":
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305 return prefix + "J";
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306 case "double":
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307 return prefix + "D";
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diff changeset
308 case "void":
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309 return prefix + "V";
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310 default:
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diff changeset
311 return prefix + "L" + className.replace('.', '/') + ";";
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312 }
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313 }
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314
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diff changeset
315 /**
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316 * Prepends the String {@code indentation} to every line in String {@code lines}, including a
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317 * possibly non-empty line following the final newline.
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318 */
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319 public static String indent(String lines, String indentation) {
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diff changeset
320 if (lines.length() == 0) {
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321 return lines;
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322 }
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323 final String newLine = "\n";
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324 if (lines.endsWith(newLine)) {
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325 return indentation + (lines.substring(0, lines.length() - 1)).replace(newLine, newLine + indentation) + newLine;
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326 }
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327 return indentation + lines.replace(newLine, newLine + indentation);
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328 }
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329
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diff changeset
330 /**
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diff changeset
331 * Gets a string representation of an object based soley on its class and its
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diff changeset
332 * {@linkplain System#identityHashCode(Object) identity hash code}. This avoids and calls to
bd74da0a76f3 implemented toString() for classes that throw UnsupportedError for hashCode()
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diff changeset
333 * virtual methods on the object such as {@link Object#hashCode()}.
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diff changeset
334 */
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diff changeset
335 public static String identityHashCodeString(Object obj) {
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diff changeset
336 if (obj == null) {
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diff changeset
337 return "null";
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diff changeset
338 }
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diff changeset
339 return obj.getClass().getName() + "@" + System.identityHashCode(obj);
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diff changeset
340 }
5507
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
341 }