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annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/VirtualObject.java @ 21743:b54b13157d4b

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removed BytecodeDisassemblerProvider
author Doug Simon <doug.simon@oracle.com>
date Fri, 05 Jun 2015 10:50:00 +0200
parents f5b549811bac
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2010, 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.code;
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24
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25 import com.oracle.jvmci.meta.ResolvedJavaField;
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26 import com.oracle.jvmci.meta.JavaValue;
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27 import com.oracle.jvmci.meta.Kind;
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28 import com.oracle.jvmci.meta.AbstractValue;
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29 import com.oracle.jvmci.meta.Value;
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30 import com.oracle.jvmci.meta.ResolvedJavaType;
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31 import com.oracle.jvmci.meta.LIRKind;
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32 import java.util.*;
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33
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34 /**
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35 * An instance of this class represents an object whose allocation was removed by escape analysis.
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36 * The information stored in the {@link VirtualObject} is used during deoptimization to recreate the
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37 * object.
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38 */
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39 public final class VirtualObject extends AbstractValue implements JavaValue {
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40
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41 private final ResolvedJavaType type;
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42 private Value[] values;
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43 private final int id;
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44
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45 /**
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46 * Creates a new {@link VirtualObject} for the given type, with the given fields. If
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47 * {@code type} is an instance class then {@code values} provides the values for the fields
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48 * returned by {@link ResolvedJavaType#getInstanceFields(boolean) getInstanceFields(true)}. If
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49 * {@code type} is an array then the length of the values array determines the reallocated array
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50 * length.
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51 *
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52 * @param type the type of the object whose allocation was removed during compilation. This can
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53 * be either an instance of an array type.
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54 * @param values an array containing all the values to be stored into the object when it is
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55 * recreated
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56 * @param id a unique id that identifies the object within the debug information for one
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57 * position in the compiled code.
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58 * @return a new {@link VirtualObject} instance.
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59 */
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60 public static VirtualObject get(ResolvedJavaType type, Value[] values, int id) {
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61 return new VirtualObject(type, values, id);
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62 }
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63
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64 private VirtualObject(ResolvedJavaType type, Value[] values, int id) {
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65 super(LIRKind.reference(Kind.Object));
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66 this.type = type;
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67 this.values = values;
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68 this.id = id;
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69 }
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70
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71 private static StringBuilder appendValue(StringBuilder buf, Value value, Set<VirtualObject> visited) {
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72 if (value instanceof VirtualObject) {
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73 VirtualObject vo = (VirtualObject) value;
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74 buf.append("vobject:").append(vo.type.toJavaName(false)).append(':').append(vo.id);
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75 if (!visited.contains(vo)) {
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76 visited.add(vo);
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77 buf.append('{');
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78 if (vo.values == null) {
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79 buf.append("<uninitialized>");
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80 } else {
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81 if (vo.type.isArray()) {
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82 for (int i = 0; i < vo.values.length; i++) {
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83 if (i != 0) {
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84 buf.append(',');
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85 }
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86 buf.append(i).append('=');
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87 appendValue(buf, vo.values[i], visited);
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88 }
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89 } else {
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90 ResolvedJavaField[] fields = vo.type.getInstanceFields(true);
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91 assert fields.length == vo.values.length : vo.type + ", fields=" + Arrays.toString(fields) + ", values=" + Arrays.toString(vo.values);
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92 for (int i = 0; i < vo.values.length; i++) {
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93 if (i != 0) {
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94 buf.append(',');
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95 }
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96 buf.append(fields[i].getName()).append('=');
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97 appendValue(buf, vo.values[i], visited);
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98 }
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99 }
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100 }
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101 buf.append('}');
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102 }
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103 } else {
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104 buf.append(value);
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105 }
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106 return buf;
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107 }
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108
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109 @Override
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110 public String toString() {
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111 Set<VirtualObject> visited = Collections.newSetFromMap(new IdentityHashMap<VirtualObject, Boolean>());
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112 return appendValue(new StringBuilder(), this, visited).toString();
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113 }
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114
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115 /**
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116 * Returns the type of the object whose allocation was removed during compilation. This can be
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117 * either an instance of an array type.
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118 */
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119 public ResolvedJavaType getType() {
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120 return type;
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121 }
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122
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123 /**
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124 * Returns an array containing all the values to be stored into the object when it is recreated.
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125 */
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126 public Value[] getValues() {
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127 return values;
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128 }
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129
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130 /**
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131 * Returns the unique id that identifies the object within the debug information for one
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132 * position in the compiled code.
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133 */
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2463eb24b644 Cleanup of Graal API: Rename methods so that it follows the getXxx naming convention and so that they are similar to the names of the java.lang.reflect classes. Remove unused methods.
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134 public int getId() {
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135 return id;
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136 }
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137
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138 private static boolean checkValues(ResolvedJavaType type, Value[] values) {
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139 if (values != null) {
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140 if (!type.isArray()) {
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141 ResolvedJavaField[] fields = type.getInstanceFields(true);
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142 int fieldIndex = 0;
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143 for (int i = 0; i < values.length; i++) {
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144 ResolvedJavaField field = fields[fieldIndex++];
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145 Kind valKind = values[i].getKind().getStackKind();
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146 if (field.getKind() == Kind.Object) {
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147 assert values[i].getLIRKind().isReference(0) : field + ": " + valKind + " != " + field.getKind();
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148 } else {
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149 if ((valKind == Kind.Double || valKind == Kind.Long) && field.getKind() == Kind.Int) {
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150 assert fields[fieldIndex].getKind() == Kind.Int;
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151 fieldIndex++;
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152 } else {
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153 assert valKind == field.getKind().getStackKind() : field + ": " + valKind + " != " + field.getKind();
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154 }
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155 }
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156 }
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157 assert fields.length == fieldIndex : type + ": fields=" + Arrays.toString(fields) + ", field values=" + Arrays.toString(values);
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158 } else {
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159 Kind componentKind = type.getComponentType().getKind().getStackKind();
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160 if (componentKind == Kind.Object) {
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161 for (int i = 0; i < values.length; i++) {
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162 assert values[i].getLIRKind().isReference(0) : values[i].getKind() + " != " + componentKind;
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163 }
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164 } else {
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165 for (int i = 0; i < values.length; i++) {
18111
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Andreas Woess <andreas.woess@jku.at>
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166 assert values[i].getKind() == componentKind || componentKind.getBitCount() >= values[i].getKind().getBitCount() ||
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167 (componentKind == Kind.Int && values[i].getKind().getBitCount() >= Kind.Int.getBitCount()) : values[i].getKind() + " != " + componentKind;
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168 }
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169 }
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170 }
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171 }
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172 return true;
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173 }
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174
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175 /**
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176 * Overwrites the current set of values with a new one.
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Roland Schatz <roland.schatz@oracle.com>
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177 *
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178 * @param values an array containing all the values to be stored into the object when it is
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179 * recreated.
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180 */
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181 public void setValues(Value[] values) {
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182 assert checkValues(type, values);
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183 this.values = values;
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184 }
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185
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186 @Override
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187 public int hashCode() {
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188 return getLIRKind().hashCode() + type.hashCode();
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189 }
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190
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191 @Override
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192 public boolean equals(Object o) {
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193 if (o == this) {
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194 return true;
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195 }
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b6617d13ea44 Dropping Ci* prefixes. Some additional renamings in the api.code interface.
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diff changeset
196 if (o instanceof VirtualObject) {
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197 VirtualObject l = (VirtualObject) o;
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198 if (!l.type.equals(type) || l.values.length != values.length) {
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199 return false;
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200 }
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201 for (int i = 0; i < values.length; i++) {
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202 /*
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203 * Virtual objects can form cycles. Calling equals() could therefore lead to
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204 * infinite recursion.
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205 */
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206 if (!same(values[i], l.values[i])) {
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207 return false;
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208 }
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209 }
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210 return true;
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211 }
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212 return false;
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213 }
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214
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215 private static boolean same(Object o1, Object o2) {
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216 return o1 == o2;
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217 }
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218 }