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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/serial/PostOrderDeserializer.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 4858c5e074e9
children 0d4b0e4263ee
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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.nodes.serial;
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26
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27 import com.oracle.truffle.api.nodes.Node;
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28 import com.oracle.truffle.api.nodes.NodeClass;
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29 import com.oracle.truffle.api.nodes.NodeFieldAccessor;
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30 import com.oracle.truffle.api.nodes.NodeFieldAccessor.NodeFieldKind;
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31 import com.oracle.truffle.api.source.SourceSection;
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32 import java.lang.reflect.Array;
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33 import java.lang.reflect.Field;
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34 import java.util.ArrayList;
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35 import java.util.List;
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36 import sun.misc.Unsafe;
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37
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38 /**
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39 * Experimental API. May change without notice.
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40 */
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41 public final class PostOrderDeserializer {
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42
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43 private static final Unsafe unsafe = loadUnsafe();
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44
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45 private final SerializerConstantPool cp;
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46
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47 private final HierarchicalStack stack = new HierarchicalStack();
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48
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49 /**
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50 * Constructs a new serializer using a custom {@link SerializerConstantPool} implementation. For
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51 * the {@link SerializerConstantPool} implementation at least the following methods must be
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52 * implemented:
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53 * <ul>
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54 * <li>{@link SerializerConstantPool#getInt(int)}</li>
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55 * <li>{@link SerializerConstantPool#getClass(int)}</li>
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56 * </ul>
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57 */
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58 public PostOrderDeserializer(SerializerConstantPool cp) {
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59 this.cp = cp;
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60 }
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61
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62 /**
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63 * Deserializes the byte stream and returns the deserialized Truffle AST node.
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64 *
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65 * @param bytes the trimmed byte array containing the serialized data
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66 * @param expectedType the expected root node type. Throws an exception if the root node is not
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67 * assignable from this type.
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68 * @return the deserialized Truffle AST represented by the root Node.
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69 *
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70 * @throws UnsupportedConstantPoolTypeException thrown if a type is encountered that is not
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71 * supported by the constant pool implementation.
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72 */
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73 @SuppressWarnings("unchecked")
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74 public <T extends Node> T deserialize(byte[] bytes, Class<T> expectedType) throws UnsupportedConstantPoolTypeException {
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75 VariableLengthIntBuffer buffer = new VariableLengthIntBuffer(bytes);
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76
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77 while (buffer.hasRemaining()) {
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78 int classCPI = buffer.get();
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79 if (classCPI == VariableLengthIntBuffer.NULL) {
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80 pushNode(null);
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81 } else {
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82 Class<?> clazz = cp.getClass(classCPI);
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83 if (clazz.isArray()) {
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84 int lengthCPI = buffer.get();
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85 if (lengthCPI == VariableLengthIntBuffer.NULL) {
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86 pushArray(null);
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87 } else {
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88 pushArray((Node[]) Array.newInstance(clazz.getComponentType(), cp.getInt(lengthCPI)));
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89 }
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90 } else {
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91 pushNode(invokeDeserialize(buffer, clazz.asSubclass(Node.class)));
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92 }
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93 }
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94 }
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95 T returnNode = (T) popNode(null, expectedType);
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96
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97 assert stack.dynamicStack.isEmpty();
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98
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99 return returnNode;
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100 }
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101
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102 private void pushNode(Node node) {
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103 stack.push(node);
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104 }
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105
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106 private void pushArray(Node[] array) {
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107 stack.pushStack(array);
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108 }
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109
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110 private Node[] popArray(Node parent, Class<?> expectedType) {
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111 Node[] array = (Node[]) stack.popStack();
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112 if (array != null) {
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113 assertType(array, expectedType);
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114 for (int i = 0; i < array.length; i++) {
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115 updateParent(parent, array[i]);
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116 }
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117 }
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118 return array;
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119 }
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120
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121 private Node popNode(Node parent, Class<?> expectedType) {
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122 Object o = stack.pop();
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123 assertType(o, expectedType);
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124 updateParent(parent, (Node) o);
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125 return (Node) o;
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126 }
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127
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128 private static void assertType(Object o, Class<?> expectedType) {
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129 if (o != null && !expectedType.isAssignableFrom(o.getClass())) {
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130 throw new AssertionError("Expected element type '" + expectedType.getName() + "' but was '" + o.getClass().getName() + "'.");
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131 }
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132 }
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133
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134 private Node invokeDeserialize(VariableLengthIntBuffer buffer, Class<? extends Node> nodeClass) throws UnsupportedConstantPoolTypeException {
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135 if (nodeClass == null) {
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136 return null;
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137 }
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138
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139 Object object;
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140 try {
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141 object = unsafe.allocateInstance(nodeClass);
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142 } catch (InstantiationException e) {
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143 throw new RuntimeException("Unable to allocate truffle node " + nodeClass, e);
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144 }
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diff changeset
145 if (!(object instanceof Node)) {
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diff changeset
146 throw new RuntimeException("Class is not a truffle node " + nodeClass);
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147 }
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148
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diff changeset
149 Node node = (Node) object;
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150
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151 NodeFieldAccessor[] nodeFields = NodeClass.get(nodeClass).getFields();
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152 deserializeChildrenFields(node, nodeFields);
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diff changeset
153 deserializeChildFields(node, nodeFields);
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diff changeset
154 deserializeDataFields(buffer, node, nodeFields);
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155
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156 return node;
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157 }
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158
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159 private void deserializeDataFields(VariableLengthIntBuffer buffer, Node nodeInstance, NodeFieldAccessor[] nodeFields) throws UnsupportedConstantPoolTypeException {
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160 for (int i = 0; i < nodeFields.length; i++) {
20129
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diff changeset
161 NodeFieldAccessor field = nodeFields[i];
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diff changeset
162 if (field.getKind() == NodeFieldKind.DATA) {
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163 Class<?> fieldClass = field.getType();
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164 long offset = getFieldOffset(field);
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165
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166 // source sections are not serialized
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167 // TODO add support for source sections
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168 if (field.getType().isAssignableFrom(SourceSection.class)) {
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169 continue;
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170 }
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171
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172 int cpi = buffer.get();
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parents:
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173 if (cpi == VariableLengthIntBuffer.NULL) {
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174 deserializeDataFieldsLengthNull(nodeInstance, fieldClass, offset);
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175 } else {
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176 deserializeDataFieldsDefault(nodeInstance, fieldClass, offset, cpi);
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177 }
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178 }
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parents:
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179 }
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180 }
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181
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182 private void deserializeDataFieldsDefault(Node nodeInstance, Class<?> fieldClass, long offset, int cpi) {
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183 if (fieldClass == int.class) {
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184 unsafe.putInt(nodeInstance, offset, cp.getInt(cpi));
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185 } else if (fieldClass == long.class) {
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186 unsafe.putLong(nodeInstance, offset, cp.getLong(cpi));
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187 } else if (fieldClass == float.class) {
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diff changeset
188 unsafe.putFloat(nodeInstance, offset, cp.getFloat(cpi));
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diff changeset
189 } else if (fieldClass == double.class) {
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diff changeset
190 unsafe.putDouble(nodeInstance, offset, cp.getDouble(cpi));
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diff changeset
191 } else if (fieldClass == byte.class) {
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diff changeset
192 unsafe.putByte(nodeInstance, offset, (byte) cp.getInt(cpi));
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diff changeset
193 } else if (fieldClass == short.class) {
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diff changeset
194 unsafe.putShort(nodeInstance, offset, (short) cp.getInt(cpi));
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195 } else if (fieldClass == char.class) {
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diff changeset
196 unsafe.putChar(nodeInstance, offset, (char) cp.getInt(cpi));
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diff changeset
197 } else if (fieldClass == boolean.class) {
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diff changeset
198 unsafe.putBoolean(nodeInstance, offset, cp.getInt(cpi) == 1 ? true : false);
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diff changeset
199 } else if (fieldClass == Integer.class) {
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diff changeset
200 unsafe.putObject(nodeInstance, offset, cp.getInt(cpi));
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Christian Wirth <christian.wirth@oracle.com>
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diff changeset
201 } else if (fieldClass == Long.class) {
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diff changeset
202 unsafe.putObject(nodeInstance, offset, cp.getLong(cpi));
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parents: 16067
diff changeset
203 } else if (fieldClass == Float.class) {
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diff changeset
204 unsafe.putObject(nodeInstance, offset, cp.getFloat(cpi));
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parents: 16067
diff changeset
205 } else if (fieldClass == Double.class) {
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parents: 16067
diff changeset
206 unsafe.putObject(nodeInstance, offset, cp.getDouble(cpi));
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parents: 16067
diff changeset
207 } else if (fieldClass == Byte.class) {
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diff changeset
208 unsafe.putObject(nodeInstance, offset, (byte) cp.getInt(cpi));
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
209 } else if (fieldClass == Short.class) {
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parents: 16067
diff changeset
210 unsafe.putObject(nodeInstance, offset, (short) cp.getInt(cpi));
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
211 } else if (fieldClass == Character.class) {
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parents: 16067
diff changeset
212 unsafe.putObject(nodeInstance, offset, (char) cp.getInt(cpi));
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parents: 16067
diff changeset
213 } else if (fieldClass == Boolean.class) {
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parents: 16067
diff changeset
214 unsafe.putObject(nodeInstance, offset, cp.getInt(cpi) == 1 ? Boolean.TRUE : Boolean.FALSE);
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parents: 16067
diff changeset
215 } else {
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parents: 16067
diff changeset
216 unsafe.putObject(nodeInstance, offset, cp.getObject(fieldClass, cpi));
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parents: 16067
diff changeset
217 }
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parents: 16067
diff changeset
218 }
45fff0246a43 extract methods in (de)serializer
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parents: 16067
diff changeset
219
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parents: 16067
diff changeset
220 private static void deserializeDataFieldsLengthNull(Node nodeInstance, Class<?> fieldClass, long offset) {
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parents: 16067
diff changeset
221 if (fieldClass == int.class) {
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parents: 16067
diff changeset
222 unsafe.putInt(nodeInstance, offset, 0);
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
223 } else if (fieldClass == long.class) {
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parents: 16067
diff changeset
224 unsafe.putLong(nodeInstance, offset, 0L);
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
225 } else if (fieldClass == float.class) {
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
226 unsafe.putFloat(nodeInstance, offset, 0.0F);
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
227 } else if (fieldClass == double.class) {
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
228 unsafe.putDouble(nodeInstance, offset, 0.0D);
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
229 } else if (fieldClass == byte.class) {
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
230 unsafe.putByte(nodeInstance, offset, (byte) 0);
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Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
231 } else if (fieldClass == short.class) {
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
232 unsafe.putShort(nodeInstance, offset, (short) 0);
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
233 } else if (fieldClass == char.class) {
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
234 unsafe.putChar(nodeInstance, offset, (char) 0);
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
235 } else if (fieldClass == boolean.class) {
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
236 unsafe.putBoolean(nodeInstance, offset, false);
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
237 } else {
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
238 unsafe.putObject(nodeInstance, offset, null);
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
239 }
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
240 }
45fff0246a43 extract methods in (de)serializer
Christian Wirth <christian.wirth@oracle.com>
parents: 16067
diff changeset
241
20129
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents: 18904
diff changeset
242 private void deserializeChildFields(Node parent, NodeFieldAccessor[] nodeFields) {
12388
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parents:
diff changeset
243 for (int i = nodeFields.length - 1; i >= 0; i--) {
20129
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents: 18904
diff changeset
244 NodeFieldAccessor field = nodeFields[i];
12388
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
245 if (field.getKind() == NodeFieldKind.CHILD) {
21985
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
246 unsafe.putObject(parent, getFieldOffset(field), popNode(parent, field.getType()));
12388
96c1d057a5ed Truffle: Added experimental serialization API.
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parents:
diff changeset
247 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
248 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
249 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
250
20129
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents: 18904
diff changeset
251 private void deserializeChildrenFields(Node parent, NodeFieldAccessor[] nodeFields) {
12388
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parents:
diff changeset
252 for (int i = nodeFields.length - 1; i >= 0; i--) {
20129
5b7db8941fd7 Truffle: make NodeClass and NodeField a top-level class.
Christian Humer <christian.humer@gmail.com>
parents: 18904
diff changeset
253 NodeFieldAccessor field = nodeFields[i];
12388
96c1d057a5ed Truffle: Added experimental serialization API.
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parents:
diff changeset
254 if (field.getKind() == NodeFieldKind.CHILDREN) {
21985
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
255 unsafe.putObject(parent, getFieldOffset(field), popArray(parent, field.getType()));
12388
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
256 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
257 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
258 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
259
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
260 private static Node updateParent(Node parent, Node child) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
261 if (child != null) {
20130
8dc73c226c63 Truffle: cache NodeClass lookup in Node.
Christian Humer <christian.humer@gmail.com>
parents: 20129
diff changeset
262 NodeClass nodeClass = NodeClass.get(child.getClass());
8dc73c226c63 Truffle: cache NodeClass lookup in Node.
Christian Humer <christian.humer@gmail.com>
parents: 20129
diff changeset
263 nodeClass.getNodeClassField().putObject(child, nodeClass);
8dc73c226c63 Truffle: cache NodeClass lookup in Node.
Christian Humer <christian.humer@gmail.com>
parents: 20129
diff changeset
264 nodeClass.getParentField().putObject(child, parent);
12388
96c1d057a5ed Truffle: Added experimental serialization API.
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parents:
diff changeset
265 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
266 return child;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
267 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
268
21985
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
269 static long getFieldOffset(NodeFieldAccessor field) {
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
270 if (field instanceof NodeFieldAccessor.AbstractUnsafeNodeFieldAccessor) {
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
271 return ((NodeFieldAccessor.AbstractUnsafeNodeFieldAccessor) field).getOffset();
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
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parents: 21951
diff changeset
272 } else {
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
273 try {
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
274 Field reflectionField = field.getDeclaringClass().getDeclaredField(field.getName());
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
275 return unsafe.objectFieldOffset(reflectionField);
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
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parents: 21951
diff changeset
276 } catch (NoSuchFieldException | SecurityException e) {
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
277 throw new RuntimeException(e);
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
278 }
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
279 }
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
280 }
4858c5e074e9 clean up NodeFieldAccessor (remove #getOffset())
Andreas Woess <andreas.woess@oracle.com>
parents: 21951
diff changeset
281
12388
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
282 private static Unsafe loadUnsafe() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
283 try {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
284 return Unsafe.getUnsafe();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
285 } catch (SecurityException e) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
286 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
287 try {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
288 Field theUnsafeInstance = Unsafe.class.getDeclaredField("theUnsafe");
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
289 theUnsafeInstance.setAccessible(true);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
290 return (Unsafe) theUnsafeInstance.get(Unsafe.class);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
291 } catch (Exception e) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
292 throw new RuntimeException("exception while trying to get Unsafe.theUnsafe via reflection:", e);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
293 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
294 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
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295
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
296 private static class HierarchicalStack {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
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297
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
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298 private static final Object NULL_STACK = new Object();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
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299
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
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300 private final List<Object> dynamicStack = new ArrayList<>();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
301
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
302 void pushStack(Object[] array) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
303 if (array == null) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
304 dynamicStack.add(NULL_STACK);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
305 } else {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
306 dynamicStack.add(new FixedSizeNodeStack(array));
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
307 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
308 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
309
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
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310 private FixedSizeNodeStack getTosStack() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
311 if (dynamicStack.isEmpty()) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
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312 return null;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
313 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
314 Object peekTos = dynamicStack.get(dynamicStack.size() - 1);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
315 if (peekTos != null && peekTos.getClass() == FixedSizeNodeStack.class) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
316 return (FixedSizeNodeStack) peekTos;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
317 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
318 return null;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
319 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
320
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
321 Object[] popStack() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
322 Object tos = dynamicStack.remove(dynamicStack.size() - 1);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
323 if (tos == NULL_STACK) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
324 return null;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
325 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
326 return ((FixedSizeNodeStack) tos).getArray();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
327 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
328
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
329 void push(Object o) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
330 FixedSizeNodeStack tosStack = getTosStack();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
331 if (tosStack != null && !tosStack.isFull()) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
332 tosStack.push(o);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
333 } else {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
334 dynamicStack.add(o);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
335 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
336 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
337
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
338 Object pop() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
339 FixedSizeNodeStack tosStack = getTosStack();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
340 Object value;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
341 if (tosStack != null) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
342 assert !tosStack.isEmpty();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
343 value = tosStack.pop();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
344 } else {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
345 value = dynamicStack.remove(dynamicStack.size() - 1);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
346 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
347 assert value != NULL_STACK;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
348 return value;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
349 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
350
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
351 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
352
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
353 private static class FixedSizeNodeStack {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
354
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
355 private final Object[] array;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
356
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
357 private int tos;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
358
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
359 FixedSizeNodeStack(Object[] array) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
360 this.array = array;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
361 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
362
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
363 boolean isFull() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
364 return tos == array.length;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
365 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
366
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
367 boolean isEmpty() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
368 return tos == 0;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
369 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
370
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
371 private void push(Object node) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
372 if (tos >= array.length) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
373 throw new ArrayIndexOutOfBoundsException();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
374 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
375 unsafe.putObject(array, Unsafe.ARRAY_OBJECT_BASE_OFFSET + Unsafe.ARRAY_OBJECT_INDEX_SCALE * (long) (tos++), node);
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
376 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
377
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
378 private Object pop() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
379 if (tos <= 0) {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
380 throw new ArrayIndexOutOfBoundsException();
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
381 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
382 return unsafe.getObject(array, Unsafe.ARRAY_OBJECT_BASE_OFFSET + Unsafe.ARRAY_OBJECT_INDEX_SCALE * (long) (--tos));
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
383 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
384
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
385 private Object[] getArray() {
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
386 return array;
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
387 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
388 }
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
389
96c1d057a5ed Truffle: Added experimental serialization API.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
390 }