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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultVirtualFrame.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 9c8c0937da41
children
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1 /*
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2 * Copyright (c) 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. 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.impl;
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26
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27 import com.oracle.truffle.api.TruffleRuntime;
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28 import com.oracle.truffle.api.frame.FrameDescriptor;
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29 import com.oracle.truffle.api.frame.FrameSlot;
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30 import com.oracle.truffle.api.frame.FrameSlotKind;
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31 import com.oracle.truffle.api.frame.FrameSlotTypeException;
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32 import com.oracle.truffle.api.frame.MaterializedFrame;
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33 import com.oracle.truffle.api.frame.VirtualFrame;
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34 import java.util.Arrays;
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35
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36 /**
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37 * This is an implementation-specific class. Do not use or instantiate it. Instead, use
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38 * {@link TruffleRuntime#createVirtualFrame(Object[], FrameDescriptor)} to create a
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39 * {@link VirtualFrame}.
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40 */
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41 final class DefaultVirtualFrame implements VirtualFrame {
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42
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43 private final FrameDescriptor descriptor;
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44 private final Object[] arguments;
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45 private Object[] locals;
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46 private byte[] tags;
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47
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48 DefaultVirtualFrame(FrameDescriptor descriptor, Object[] arguments) {
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49 this.descriptor = descriptor;
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50 this.arguments = arguments;
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51 this.locals = new Object[descriptor.getSize()];
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52 Arrays.fill(locals, descriptor.getDefaultValue());
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53 this.tags = new byte[descriptor.getSize()];
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54 }
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55
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56 @Override
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57 public Object[] getArguments() {
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58 return arguments;
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59 }
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60
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61 @Override
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62 public MaterializedFrame materialize() {
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63 return new DefaultMaterializedFrame(this);
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64 }
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65
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66 @Override
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67 public Object getObject(FrameSlot slot) throws FrameSlotTypeException {
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68 verifyGet(slot, FrameSlotKind.Object);
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69 return locals[slot.getIndex()];
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70 }
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72 @Override
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73 public void setObject(FrameSlot slot, Object value) {
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74 verifySet(slot, FrameSlotKind.Object);
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75 locals[slot.getIndex()] = value;
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76 }
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78 @Override
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79 public byte getByte(FrameSlot slot) throws FrameSlotTypeException {
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80 verifyGet(slot, FrameSlotKind.Byte);
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81 return (byte) locals[slot.getIndex()];
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82 }
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83
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84 @Override
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85 public void setByte(FrameSlot slot, byte value) {
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86 verifySet(slot, FrameSlotKind.Byte);
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87 locals[slot.getIndex()] = value;
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88 }
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89
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90 @Override
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91 public boolean getBoolean(FrameSlot slot) throws FrameSlotTypeException {
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92 verifyGet(slot, FrameSlotKind.Boolean);
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93 return (boolean) locals[slot.getIndex()];
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94 }
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96 @Override
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97 public void setBoolean(FrameSlot slot, boolean value) {
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98 verifySet(slot, FrameSlotKind.Boolean);
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99 locals[slot.getIndex()] = value;
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100 }
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102 @Override
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103 public int getInt(FrameSlot slot) throws FrameSlotTypeException {
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104 verifyGet(slot, FrameSlotKind.Int);
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105 return (int) locals[slot.getIndex()];
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106 }
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107
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108 @Override
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109 public void setInt(FrameSlot slot, int value) {
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110 verifySet(slot, FrameSlotKind.Int);
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111 locals[slot.getIndex()] = value;
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112 }
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113
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114 @Override
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115 public long getLong(FrameSlot slot) throws FrameSlotTypeException {
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116 verifyGet(slot, FrameSlotKind.Long);
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117 return (long) locals[slot.getIndex()];
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118 }
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119
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120 @Override
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121 public void setLong(FrameSlot slot, long value) {
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122 verifySet(slot, FrameSlotKind.Long);
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123 locals[slot.getIndex()] = value;
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124 }
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125
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126 @Override
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127 public float getFloat(FrameSlot slot) throws FrameSlotTypeException {
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128 verifyGet(slot, FrameSlotKind.Float);
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129 return (float) locals[slot.getIndex()];
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130 }
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131
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132 @Override
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133 public void setFloat(FrameSlot slot, float value) {
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134 verifySet(slot, FrameSlotKind.Float);
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135 locals[slot.getIndex()] = value;
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136 }
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137
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138 @Override
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139 public double getDouble(FrameSlot slot) throws FrameSlotTypeException {
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140 verifyGet(slot, FrameSlotKind.Double);
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141 return (double) locals[slot.getIndex()];
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142 }
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143
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144 @Override
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145 public void setDouble(FrameSlot slot, double value) {
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146 verifySet(slot, FrameSlotKind.Double);
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147 locals[slot.getIndex()] = value;
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148 }
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149
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150 @Override
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151 public FrameDescriptor getFrameDescriptor() {
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152 return this.descriptor;
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153 }
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154
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155 @Override
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156 public Object getValue(FrameSlot slot) {
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157 int slotIndex = getSlotIndexChecked(slot);
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158 return locals[slotIndex];
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159 }
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160
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161 private int getSlotIndexChecked(FrameSlot slot) {
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162 int slotIndex = slot.getIndex();
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163 if (slotIndex >= tags.length) {
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164 if (!resize()) {
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165 throw new IllegalArgumentException(String.format("The frame slot '%s' is not known by the frame descriptor.", slot));
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166 }
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167 }
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168 return slotIndex;
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169 }
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170
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171 private void verifySet(FrameSlot slot, FrameSlotKind accessKind) {
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172 int slotIndex = getSlotIndexChecked(slot);
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173 tags[slotIndex] = (byte) accessKind.ordinal();
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174 }
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175
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176 private void verifyGet(FrameSlot slot, FrameSlotKind accessKind) throws FrameSlotTypeException {
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177 int slotIndex = getSlotIndexChecked(slot);
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178 byte tag = tags[slotIndex];
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179 if (accessKind == FrameSlotKind.Object ? tag != 0 : tag != accessKind.ordinal()) {
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180 throw new FrameSlotTypeException();
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181 }
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182 }
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183
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184 private boolean resize() {
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185 int oldSize = tags.length;
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186 int newSize = descriptor.getSize();
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187 if (newSize > oldSize) {
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188 locals = Arrays.copyOf(locals, newSize);
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189 Arrays.fill(locals, oldSize, newSize, descriptor.getDefaultValue());
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190 tags = Arrays.copyOf(tags, newSize);
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191 return true;
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192 }
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193 return false;
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194 }
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195
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196 private byte getTag(FrameSlot slot) {
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197 int slotIndex = getSlotIndexChecked(slot);
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198 return tags[slotIndex];
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199 }
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200
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201 @Override
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202 public boolean isObject(FrameSlot slot) {
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203 return getTag(slot) == FrameSlotKind.Object.ordinal();
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204 }
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205
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206 @Override
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207 public boolean isByte(FrameSlot slot) {
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208 return getTag(slot) == FrameSlotKind.Byte.ordinal();
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209 }
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210
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211 @Override
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Andreas Woess <andreas.woess@jku.at>
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212 public boolean isBoolean(FrameSlot slot) {
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213 return getTag(slot) == FrameSlotKind.Boolean.ordinal();
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214 }
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215
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216 @Override
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Andreas Woess <andreas.woess@jku.at>
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217 public boolean isInt(FrameSlot slot) {
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218 return getTag(slot) == FrameSlotKind.Int.ordinal();
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219 }
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220
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221 @Override
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Andreas Woess <andreas.woess@jku.at>
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222 public boolean isLong(FrameSlot slot) {
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223 return getTag(slot) == FrameSlotKind.Long.ordinal();
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Andreas Woess <andreas.woess@jku.at>
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224 }
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225
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226 @Override
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227 public boolean isFloat(FrameSlot slot) {
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228 return getTag(slot) == FrameSlotKind.Float.ordinal();
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229 }
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230
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231 @Override
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Andreas Woess <andreas.woess@jku.at>
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232 public boolean isDouble(FrameSlot slot) {
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233 return getTag(slot) == FrameSlotKind.Double.ordinal();
9952
5d91b0b67cba Introduce Frame.isInitialized in the Truffle API.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9330
diff changeset
234 }
7267
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
235 }