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0
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1 /*
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2 * Copyright 2002-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.tools.jcore;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.oops.*;
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30 import sun.jvm.hotspot.runtime.*;
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31
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32 public class ClassWriter implements /* imports */ ClassConstants
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33 {
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34 public static final boolean DEBUG = false;
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35
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36 protected void debugMessage(String message) {
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37 System.out.println(message);
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38 }
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39
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40 protected InstanceKlass klass;
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41 protected DataOutputStream dos;
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42 protected ConstantPool cpool;
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43 protected boolean is15Format;
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44
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45 // Map between class name to index of type CONSTANT_Class
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46 protected Map classToIndex = new HashMap();
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47
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48 // Map between any modified UTF-8 and it's constant pool index.
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49 protected Map utf8ToIndex = new HashMap();
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50
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51 // constant pool index for attribute names.
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52
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53 protected short _sourceFileIndex;
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54 protected short _innerClassesIndex;
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55 protected short _syntheticIndex;
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56 protected short _deprecatedIndex;
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57 protected short _constantValueIndex;
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58 protected short _codeIndex;
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59 protected short _exceptionsIndex;
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60 protected short _lineNumberTableIndex;
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61 protected short _localVariableTableIndex;
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62 protected short _signatureIndex;
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63
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64 protected static int extractHighShortFromInt(int val) {
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65 return (val >> 16) & 0xFFFF;
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66 }
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67
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68 protected static int extractLowShortFromInt(int val) {
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69 return val & 0xFFFF;
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70 }
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71
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72 public ClassWriter(InstanceKlass kls, OutputStream os) {
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73 klass = kls;
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74 dos = new DataOutputStream(os);
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75 cpool = klass.getConstants();
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76 is15Format = is15ClassFile();
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77 }
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78
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79 public void write() throws IOException {
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80 if (DEBUG) debugMessage("class name = " + klass.getName().asString());
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81
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82 // write magic
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83 dos.writeInt(0xCAFEBABE);
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84
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85 writeVersion(is15Format);
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86 writeConstantPool();
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87 writeClassAccessFlags();
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88 writeThisClass();
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89 writeSuperClass();
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90 writeInterfaces();
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91 writeFields();
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92 writeMethods();
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93 writeClassAttributes();
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94
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95 // flush output
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96 dos.flush();
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97 }
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98
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99 protected boolean is15ClassFile() {
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100 // if klass has generic signature, then it is 1.5 class file.
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101 if (klass.getGenericSignature() != null) {
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102 return true;
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103 }
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104
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105 // if atleast one method has generic signature
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106 // , then we have 1.5 class file.
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107 ObjArray methods = klass.getMethods();
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108 final int numMethods = (int) methods.getLength();
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109 for (int m = 0; m < numMethods; m++) {
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110 Method curMethod = (Method) methods.getObjAt(m);
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111 if (curMethod.getGenericSignature() != null) {
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112 return true;
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113 }
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114 }
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115
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116 // if atleast one field has non-zero generic signature index, then we have
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117 // 1.5 class file
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118 TypeArray fields = klass.getFields();
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119 final int numFields = (int) fields.getLength();
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120 for (int f = 0; f < numFields; f += InstanceKlass.NEXT_OFFSET) {
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121 short genSigIndex = fields.getShortAt(f + InstanceKlass.GENERIC_SIGNATURE_INDEX_OFFSET);
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122 if (genSigIndex != (short)0) return true;
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123 }
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124
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125 return false;
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126 }
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127
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128 protected void writeVersion(boolean is15Format) throws IOException {
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129 if (is15Format) {
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130 dos.writeShort(MINOR_VERSION);
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131 dos.writeShort(MAJOR_VERSION);
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132 } else {
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133 dos.writeShort(MINOR_VERSION_OLD);
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134 dos.writeShort(MAJOR_VERSION_OLD);
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135 }
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136 }
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137
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138 protected void writeConstantPool() throws IOException {
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139 final TypeArray tags = cpool.getTags();
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140 final long len = tags.getLength();
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141 dos.writeShort((short) len);
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142
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143 if (DEBUG) debugMessage("constant pool length = " + len);
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144
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145 int ci = 0; // constant pool index
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146
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147 // collect all modified UTF-8 Strings from Constant Pool
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148
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149 for (ci = 1; ci < len; ci++) {
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150 byte cpConstType = tags.getByteAt(ci);
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151 if(cpConstType == JVM_CONSTANT_Utf8) {
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152 Symbol sym = cpool.getSymbolAt(ci);
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153 utf8ToIndex.put(sym.asString(), new Short((short) ci));
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154 }
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155 else if(cpConstType == JVM_CONSTANT_Long ||
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156 cpConstType == JVM_CONSTANT_Double) {
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157 ci++;
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158 }
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159 }
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160
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161 // remember index of attribute name modified UTF-8 strings
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162
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163 // class attributes
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164 Short sourceFileIndex = (Short) utf8ToIndex.get("SourceFile");
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165 _sourceFileIndex = (sourceFileIndex != null)? sourceFileIndex.shortValue() : 0;
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166 if (DEBUG) debugMessage("SourceFile index = " + _sourceFileIndex);
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167
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168 Short innerClassesIndex = (Short) utf8ToIndex.get("InnerClasses");
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169 _innerClassesIndex = (innerClassesIndex != null)? innerClassesIndex.shortValue() : 0;
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170 if (DEBUG) debugMessage("InnerClasses index = " + _innerClassesIndex);
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171
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172 // field attributes
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173 Short constantValueIndex = (Short) utf8ToIndex.get("ConstantValue");
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174 _constantValueIndex = (constantValueIndex != null)?
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175 constantValueIndex.shortValue() : 0;
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176 if (DEBUG) debugMessage("ConstantValue index = " + _constantValueIndex);
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177
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178 Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic");
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179 _syntheticIndex = (syntheticIndex != null)? syntheticIndex.shortValue() : 0;
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180 if (DEBUG) debugMessage("Synthetic index = " + _syntheticIndex);
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181
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182 Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated");
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183 _deprecatedIndex = (deprecatedIndex != null)? deprecatedIndex.shortValue() : 0;
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184 if (DEBUG) debugMessage("Deprecated index = " + _deprecatedIndex);
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185
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186 // method attributes
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187 Short codeIndex = (Short) utf8ToIndex.get("Code");
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188 _codeIndex = (codeIndex != null)? codeIndex.shortValue() : 0;
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189 if (DEBUG) debugMessage("Code index = " + _codeIndex);
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190
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191 Short exceptionsIndex = (Short) utf8ToIndex.get("Exceptions");
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192 _exceptionsIndex = (exceptionsIndex != null)? exceptionsIndex.shortValue() : 0;
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193 if (DEBUG) debugMessage("Exceptions index = " + _exceptionsIndex);
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194
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195 // Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic");
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196 // Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated");
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197
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198 // Code attributes
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199 Short lineNumberTableIndex = (Short) utf8ToIndex.get("LineNumberTable");
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200 _lineNumberTableIndex = (lineNumberTableIndex != null)?
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201 lineNumberTableIndex.shortValue() : 0;
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202 if (DEBUG) debugMessage("LineNumberTable index = " + _lineNumberTableIndex);
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203
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204 Short localVariableTableIndex = (Short) utf8ToIndex.get("LocalVariableTable");
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205 _localVariableTableIndex = (localVariableTableIndex != null)?
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206 localVariableTableIndex.shortValue() : 0;
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207 if (DEBUG) debugMessage("LocalVariableTable index = " + _localVariableTableIndex);
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208
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209 Short signatureIdx = (Short) utf8ToIndex.get("Signature");
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210 _signatureIndex = (signatureIdx != null)? signatureIdx.shortValue() : 0;
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211 if (DEBUG) debugMessage("Signature index = " + _signatureIndex);
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212
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213 for(ci = 1; ci < len; ci++) {
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214 // write cp_info
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215 // write constant type
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216 byte cpConstType = tags.getByteAt(ci);
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217 switch(cpConstType) {
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218 case JVM_CONSTANT_Utf8: {
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219 dos.writeByte(cpConstType);
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220 Symbol sym = cpool.getSymbolAt(ci);
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221 dos.writeShort((short)sym.getLength());
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222 dos.write(sym.asByteArray());
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223 if (DEBUG) debugMessage("CP[" + ci + "] = modified UTF-8 " + sym.asString());
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224 break;
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225 }
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226
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227 case JVM_CONSTANT_Unicode:
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228 throw new IllegalArgumentException("Unicode constant!");
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229
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230 case JVM_CONSTANT_Integer:
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231 dos.writeByte(cpConstType);
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232 dos.writeInt(cpool.getIntAt(ci));
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233 if (DEBUG) debugMessage("CP[" + ci + "] = int " + cpool.getIntAt(ci));
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234 break;
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235
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236 case JVM_CONSTANT_Float:
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237 dos.writeByte(cpConstType);
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238 dos.writeFloat(cpool.getFloatAt(ci));
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239 if (DEBUG) debugMessage("CP[" + ci + "] = float " + cpool.getFloatAt(ci));
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240 break;
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241
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242 case JVM_CONSTANT_Long: {
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243 dos.writeByte(cpConstType);
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244 long l = cpool.getLongAt(ci);
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245 // long entries occupy two pool entries
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246 ci++;
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247 dos.writeLong(l);
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248 break;
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249 }
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250
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251 case JVM_CONSTANT_Double:
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252 dos.writeByte(cpConstType);
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253 dos.writeDouble(cpool.getDoubleAt(ci));
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254 // double entries occupy two pool entries
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255 ci++;
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256 break;
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257
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258 case JVM_CONSTANT_Class: {
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259 dos.writeByte(cpConstType);
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260 // Klass already resolved. ConstantPool constains klassOop.
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261 Klass refKls = (Klass) cpool.getObjAt(ci);
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262 String klassName = refKls.getName().asString();
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263
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264 Short s = (Short) utf8ToIndex.get(klassName);
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265 classToIndex.put(klassName, new Short((short)ci));
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266 dos.writeShort(s.shortValue());
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267 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s);
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268 break;
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269 }
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270
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271 // case JVM_CONSTANT_ClassIndex:
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272 case JVM_CONSTANT_UnresolvedClass: {
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273 dos.writeByte(JVM_CONSTANT_Class);
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274 String klassName = cpool.getSymbolAt(ci).asString();
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275
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276 Short s = (Short) utf8ToIndex.get(klassName);
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277 classToIndex.put(klassName, new Short((short) ci));
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278
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279 dos.writeShort(s.shortValue());
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280 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s);
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281 break;
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282 }
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283
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284 case JVM_CONSTANT_String: {
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285 dos.writeByte(cpConstType);
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286 String str = OopUtilities.stringOopToString(cpool.getObjAt(ci));
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287 Short s = (Short) utf8ToIndex.get(str);
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288 dos.writeShort(s.shortValue());
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289 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s);
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290 break;
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291 }
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292
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293 // case JVM_CONSTANT_StringIndex:
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294 case JVM_CONSTANT_UnresolvedString: {
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295 dos.writeByte(JVM_CONSTANT_String);
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296 String val = cpool.getSymbolAt(ci).asString();
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297
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298 Short s = (Short) utf8ToIndex.get(val);
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299 dos.writeShort(s.shortValue());
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300 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s);
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301 break;
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302 }
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303
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304 // all external, internal method/field references
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305 case JVM_CONSTANT_Fieldref:
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306 case JVM_CONSTANT_Methodref:
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307 case JVM_CONSTANT_InterfaceMethodref: {
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308 dos.writeByte(cpConstType);
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309 int value = cpool.getIntAt(ci);
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310 short klassIndex = (short) extractLowShortFromInt(value);
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311 short nameAndTypeIndex = (short) extractHighShortFromInt(value);
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312 dos.writeShort(klassIndex);
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313 dos.writeShort(nameAndTypeIndex);
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314 if (DEBUG) debugMessage("CP[" + ci + "] = ref klass = " +
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315 klassIndex + ", N&T = " + nameAndTypeIndex);
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316 break;
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317 }
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318
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319 case JVM_CONSTANT_NameAndType: {
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320 dos.writeByte(cpConstType);
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321 int value = cpool.getIntAt(ci);
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322 short nameIndex = (short) extractLowShortFromInt(value);
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323 short signatureIndex = (short) extractHighShortFromInt(value);
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324 dos.writeShort(nameIndex);
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325 dos.writeShort(signatureIndex);
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326 if (DEBUG) debugMessage("CP[" + ci + "] = N&T name = " + nameIndex
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327 + ", type = " + signatureIndex);
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328 break;
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329 }
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330 } // switch
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331 }
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332 }
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333
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334 protected void writeClassAccessFlags() throws IOException {
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335 int flags = (int)(klass.getAccessFlags() & JVM_RECOGNIZED_CLASS_MODIFIERS);
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336 dos.writeShort((short)flags);
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337 }
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338
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339 protected void writeThisClass() throws IOException {
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340 String klassName = klass.getName().asString();
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341 Short index = (Short) classToIndex.get(klassName);
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342 dos.writeShort(index.shortValue());
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343 if (DEBUG) debugMessage("this class = " + index);
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344 }
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345
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346 protected void writeSuperClass() throws IOException {
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347 Klass superKlass = klass.getSuper();
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348 if (superKlass != null) { // is not java.lang.Object
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349 String superName = superKlass.getName().asString();
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350 Short index = (Short) classToIndex.get(superName);
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351 if (DEBUG) debugMessage("super class = " + index);
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352 dos.writeShort(index.shortValue());
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353 } else {
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354 dos.writeShort(0); // no super class
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355 }
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356 }
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357 protected void writeInterfaces() throws IOException {
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358 ObjArray interfaces = klass.getLocalInterfaces();
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359 final int len = (int) interfaces.getLength();
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360
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361 if (DEBUG) debugMessage("number of interfaces = " + len);
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362
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363 // write interfaces count
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364 dos.writeShort((short) len);
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365 for (int i = 0; i < len; i++) {
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366 Klass k = (Klass) interfaces.getObjAt(i);
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367 Short index = (Short) classToIndex.get(k.getName().asString());
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368 dos.writeShort(index.shortValue());
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369 if (DEBUG) debugMessage("\t" + index);
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370 }
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371 }
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372
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373 protected void writeFields() throws IOException {
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374 TypeArray fields = klass.getFields();
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375 final int length = (int) fields.getLength();
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376
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377 // write number of fields
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378 dos.writeShort((short) (length / InstanceKlass.NEXT_OFFSET) );
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379
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380 if (DEBUG) debugMessage("number of fields = "
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381 + length/InstanceKlass.NEXT_OFFSET);
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382
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383 for (int index = 0; index < length; index += InstanceKlass.NEXT_OFFSET) {
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384 short accessFlags = fields.getShortAt(index + InstanceKlass.ACCESS_FLAGS_OFFSET);
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385 dos.writeShort(accessFlags & (short) JVM_RECOGNIZED_FIELD_MODIFIERS);
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386
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387 short nameIndex = fields.getShortAt(index + InstanceKlass.NAME_INDEX_OFFSET);
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388 dos.writeShort(nameIndex);
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389
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390 short signatureIndex = fields.getShortAt(index + InstanceKlass.SIGNATURE_INDEX_OFFSET);
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391 dos.writeShort(signatureIndex);
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392 if (DEBUG) debugMessage("\tfield name = " + nameIndex + ", signature = " + signatureIndex);
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393
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394 short fieldAttributeCount = 0;
|
|
|
395 boolean isSyn = isSynthetic(accessFlags);
|
|
|
396 if (isSyn)
|
|
|
397 fieldAttributeCount++;
|
|
|
398
|
|
|
399 short initvalIndex = fields.getShortAt(index + InstanceKlass.INITVAL_INDEX_OFFSET);
|
|
|
400 if (initvalIndex != 0)
|
|
|
401 fieldAttributeCount++;
|
|
|
402
|
|
|
403 short genSigIndex = fields.getShortAt(index + InstanceKlass.GENERIC_SIGNATURE_INDEX_OFFSET);
|
|
|
404 if (genSigIndex != 0)
|
|
|
405 fieldAttributeCount++;
|
|
|
406
|
|
|
407 dos.writeShort(fieldAttributeCount);
|
|
|
408
|
|
|
409 // write synthetic, if applicable
|
|
|
410 if (isSyn)
|
|
|
411 writeSynthetic();
|
|
|
412
|
|
|
413 if (initvalIndex != 0) {
|
|
|
414 dos.writeShort(_constantValueIndex);
|
|
|
415 dos.writeInt(2);
|
|
|
416 dos.writeShort(initvalIndex);
|
|
|
417 if (DEBUG) debugMessage("\tfield init value = " + initvalIndex);
|
|
|
418 }
|
|
|
419
|
|
|
420 if (genSigIndex != 0) {
|
|
|
421 dos.writeShort(_signatureIndex);
|
|
|
422 dos.writeInt(2);
|
|
|
423 dos.writeShort(genSigIndex);
|
|
|
424 if (DEBUG) debugMessage("\tfield generic signature index " + genSigIndex);
|
|
|
425 }
|
|
|
426 }
|
|
|
427 }
|
|
|
428
|
|
|
429 protected boolean isSynthetic(short accessFlags) {
|
|
|
430 return (accessFlags & (short) JVM_ACC_SYNTHETIC) != 0;
|
|
|
431 }
|
|
|
432
|
|
|
433 protected void writeSynthetic() throws IOException {
|
|
|
434 dos.writeShort(_syntheticIndex);
|
|
|
435 dos.writeInt(0);
|
|
|
436 }
|
|
|
437
|
|
|
438 protected void writeMethods() throws IOException {
|
|
|
439 ObjArray methods = klass.getMethods();
|
|
|
440 final int len = (int) methods.getLength();
|
|
|
441 // write number of methods
|
|
|
442 dos.writeShort((short) len);
|
|
|
443 if (DEBUG) debugMessage("number of methods = " + len);
|
|
|
444 for (int m = 0; m < len; m++) {
|
|
|
445 writeMethod((Method) methods.getObjAt(m));
|
|
|
446 }
|
|
|
447 }
|
|
|
448
|
|
|
449 protected void writeMethod(Method m) throws IOException {
|
|
|
450 long accessFlags = m.getAccessFlags();
|
|
|
451 dos.writeShort((short) (accessFlags & JVM_RECOGNIZED_METHOD_MODIFIERS));
|
|
|
452 dos.writeShort((short) m.getNameIndex());
|
|
|
453 dos.writeShort((short) m.getSignatureIndex());
|
|
|
454 if (DEBUG) debugMessage("\tmethod name = " + m.getNameIndex() + ", signature = "
|
|
|
455 + m.getSignatureIndex());
|
|
|
456
|
|
|
457 final boolean isNative = ((accessFlags & JVM_ACC_NATIVE) != 0);
|
|
|
458 final boolean isAbstract = ((accessFlags & JVM_ACC_ABSTRACT) != 0);
|
|
|
459
|
|
|
460 short methodAttributeCount = 0;
|
|
|
461
|
|
|
462 final boolean isSyn = isSynthetic((short)accessFlags);
|
|
|
463 if (isSyn)
|
|
|
464 methodAttributeCount++;
|
|
|
465
|
|
|
466 final boolean hasCheckedExceptions = m.hasCheckedExceptions();
|
|
|
467 if (hasCheckedExceptions)
|
|
|
468 methodAttributeCount++;
|
|
|
469
|
|
|
470 final boolean isCodeAvailable = (!isNative) && (!isAbstract);
|
|
|
471 if (isCodeAvailable)
|
|
|
472 methodAttributeCount++;
|
|
|
473
|
|
|
474 final boolean isGeneric = (m.getGenericSignature() != null);
|
|
|
475 if (isGeneric)
|
|
|
476 methodAttributeCount++;
|
|
|
477
|
|
|
478 dos.writeShort(methodAttributeCount);
|
|
|
479 if (DEBUG) debugMessage("\tmethod attribute count = " + methodAttributeCount);
|
|
|
480
|
|
|
481 if (isSyn) {
|
|
|
482 if (DEBUG) debugMessage("\tmethod is synthetic");
|
|
|
483 writeSynthetic();
|
|
|
484 }
|
|
|
485
|
|
|
486 if (hasCheckedExceptions) {
|
|
|
487 CheckedExceptionElement[] exceptions = m.getCheckedExceptions();
|
|
|
488 dos.writeShort(_exceptionsIndex);
|
|
|
489
|
|
|
490 int attrSize = 2 /* number_of_exceptions */ +
|
|
|
491 exceptions.length * 2 /* exception_index */;
|
|
|
492 dos.writeInt(attrSize);
|
|
|
493 dos.writeShort(exceptions.length);
|
|
|
494 if (DEBUG) debugMessage("\tmethod has " + exceptions.length
|
|
|
495 + " checked exception(s)");
|
|
|
496 for (int e = 0; e < exceptions.length; e++) {
|
|
|
497 short cpIndex = (short) exceptions[e].getClassCPIndex();
|
|
|
498 dos.writeShort(cpIndex);
|
|
|
499 }
|
|
|
500 }
|
|
|
501
|
|
|
502 if (isCodeAvailable) {
|
|
|
503 byte[] code = m.getByteCode();
|
|
|
504 short codeAttrCount = 0;
|
|
|
505 int codeSize = 2 /* max_stack */ +
|
|
|
506 2 /* max_locals */ +
|
|
|
507 4 /* code_length */ +
|
|
|
508 code.length /* code */ +
|
|
|
509 2 /* exp. table len. */ +
|
|
|
510 2 /* code attr. count */;
|
|
|
511
|
|
|
512 TypeArray exceptionTable = m.getExceptionTable();
|
|
|
513 final int exceptionTableLen = (int) exceptionTable.getLength();
|
|
|
514 if (exceptionTableLen != 0) {
|
|
|
515 if (DEBUG) debugMessage("\tmethod has exception table");
|
|
|
516 codeSize += (exceptionTableLen / 4) /* exception table is 4-tuple array */
|
|
|
517 * (2 /* start_pc */ +
|
|
|
518 2 /* end_pc */ +
|
|
|
519 2 /* handler_pc */ +
|
|
|
520 2 /* catch_type */);
|
|
|
521 }
|
|
|
522
|
|
|
523 boolean hasLineNumberTable = m.hasLineNumberTable();
|
|
|
524 LineNumberTableElement[] lineNumberTable = null;
|
|
|
525 int lineNumberAttrLen = 0;
|
|
|
526
|
|
|
527 if (hasLineNumberTable) {
|
|
|
528 if (DEBUG) debugMessage("\tmethod has line number table");
|
|
|
529 lineNumberTable = m.getLineNumberTable();
|
|
|
530 if (DEBUG) debugMessage("\t\tline table length = " + lineNumberTable.length);
|
|
|
531
|
|
|
532 lineNumberAttrLen = 2 /* line number table length */ +
|
|
|
533 lineNumberTable.length * (2 /* start_pc */ + 2 /* line_number */);
|
|
|
534
|
|
|
535 codeSize += 2 /* line number table attr index */ +
|
|
|
536 4 /* line number table attr length */ +
|
|
|
537 lineNumberAttrLen;
|
|
|
538
|
|
|
539 if (DEBUG) debugMessage("\t\tline number table attr size = " +
|
|
|
540 lineNumberAttrLen);
|
|
|
541
|
|
|
542 codeAttrCount++;
|
|
|
543 }
|
|
|
544
|
|
|
545 boolean hasLocalVariableTable = m.hasLocalVariableTable();
|
|
|
546 LocalVariableTableElement[] localVariableTable = null;
|
|
|
547 int localVarAttrLen = 0;
|
|
|
548
|
|
|
549 if (hasLocalVariableTable) {
|
|
|
550 if (DEBUG) debugMessage("\tmethod has local variable table");
|
|
|
551 localVariableTable = m.getLocalVariableTable();
|
|
|
552 if (DEBUG) debugMessage("\t\tlocal variable table length = "
|
|
|
553 + localVariableTable.length);
|
|
|
554 localVarAttrLen =
|
|
|
555 2 /* local variable table length */ +
|
|
|
556 localVariableTable.length * ( 2 /* start_pc */ +
|
|
|
557 2 /* length */ +
|
|
|
558 2 /* name_index */ +
|
|
|
559 2 /* signature_index */ +
|
|
|
560 2 /* variable index */ );
|
|
|
561
|
|
|
562 if (DEBUG) debugMessage("\t\tlocal variable attr size = " +
|
|
|
563 localVarAttrLen);
|
|
|
564
|
|
|
565 codeSize += 2 /* local variable table attr index */ +
|
|
|
566 4 /* local variable table attr length */ +
|
|
|
567 localVarAttrLen;
|
|
|
568
|
|
|
569 codeAttrCount++;
|
|
|
570 }
|
|
|
571
|
|
|
572 // fix ConstantPoolCache indices to ConstantPool indices.
|
|
|
573 rewriteByteCode(m, code);
|
|
|
574
|
|
|
575 // start writing Code
|
|
|
576
|
|
|
577 dos.writeShort(_codeIndex);
|
|
|
578
|
|
|
579 dos.writeInt(codeSize);
|
|
|
580 if (DEBUG) debugMessage("\tcode attribute length = " + codeSize);
|
|
|
581
|
|
|
582 dos.writeShort((short) m.getMaxStack());
|
|
|
583 if (DEBUG) debugMessage("\tmax stack = " + m.getMaxStack());
|
|
|
584
|
|
|
585 dos.writeShort((short) m.getMaxLocals());
|
|
|
586 if (DEBUG) debugMessage("\tmax locals = " + m.getMaxLocals());
|
|
|
587
|
|
|
588 dos.writeInt(code.length);
|
|
|
589 if (DEBUG) debugMessage("\tcode size = " + code.length);
|
|
|
590
|
|
|
591 dos.write(code);
|
|
|
592
|
|
|
593 // write exception table size
|
|
|
594 dos.writeShort((short) (exceptionTableLen / 4));
|
|
|
595 if (DEBUG) debugMessage("\texception table length = " + (exceptionTableLen / 4));
|
|
|
596
|
|
|
597 if (exceptionTableLen != 0) {
|
|
|
598 for (int e = 0; e < exceptionTableLen; e += 4) {
|
|
|
599 dos.writeShort((short) exceptionTable.getIntAt(e));
|
|
|
600 dos.writeShort((short) exceptionTable.getIntAt(e + 1));
|
|
|
601 dos.writeShort((short) exceptionTable.getIntAt(e + 2));
|
|
|
602 dos.writeShort((short) exceptionTable.getIntAt(e + 3));
|
|
|
603 }
|
|
|
604 }
|
|
|
605
|
|
|
606 dos.writeShort((short)codeAttrCount);
|
|
|
607 if (DEBUG) debugMessage("\tcode attribute count = " + codeAttrCount);
|
|
|
608
|
|
|
609 // write LineNumberTable, if available.
|
|
|
610 if (hasLineNumberTable) {
|
|
|
611 dos.writeShort(_lineNumberTableIndex);
|
|
|
612 dos.writeInt(lineNumberAttrLen);
|
|
|
613 dos.writeShort((short) lineNumberTable.length);
|
|
|
614 for (int l = 0; l < lineNumberTable.length; l++) {
|
|
|
615 dos.writeShort((short) lineNumberTable[l].getStartBCI());
|
|
|
616 dos.writeShort((short) lineNumberTable[l].getLineNumber());
|
|
|
617 }
|
|
|
618 }
|
|
|
619
|
|
|
620 // write LocalVariableTable, if available.
|
|
|
621 if (hasLocalVariableTable) {
|
|
|
622 dos.writeShort((short) _localVariableTableIndex);
|
|
|
623 dos.writeInt(localVarAttrLen);
|
|
|
624 dos.writeShort((short) localVariableTable.length);
|
|
|
625 for (int l = 0; l < localVariableTable.length; l++) {
|
|
|
626 dos.writeShort((short) localVariableTable[l].getStartBCI());
|
|
|
627 dos.writeShort((short) localVariableTable[l].getLength());
|
|
|
628 dos.writeShort((short) localVariableTable[l].getNameCPIndex());
|
|
|
629 dos.writeShort((short) localVariableTable[l].getDescriptorCPIndex());
|
|
|
630 dos.writeShort((short) localVariableTable[l].getSlot());
|
|
|
631 }
|
|
|
632 }
|
|
|
633 }
|
|
|
634
|
|
|
635 if (isGeneric) {
|
|
|
636 writeGenericSignature(m.getGenericSignature().asString());
|
|
|
637 }
|
|
|
638 }
|
|
|
639
|
|
|
640 protected void rewriteByteCode(Method m, byte[] code) {
|
|
|
641 ByteCodeRewriter r = new ByteCodeRewriter(m, cpool, code);
|
|
|
642 r.rewrite();
|
|
|
643 }
|
|
|
644
|
|
|
645 protected void writeGenericSignature(String signature) throws IOException {
|
|
|
646 dos.writeShort(_signatureIndex);
|
|
|
647 if (DEBUG) debugMessage("signature attribute = " + _signatureIndex);
|
|
|
648 dos.writeInt(2);
|
|
|
649 Short index = (Short) utf8ToIndex.get(signature);
|
|
|
650 dos.writeShort(index.shortValue());
|
|
|
651 if (DEBUG) debugMessage("generic signature = " + index);
|
|
|
652 }
|
|
|
653
|
|
|
654 protected void writeClassAttributes() throws IOException {
|
|
|
655 final long flags = klass.getAccessFlags();
|
|
|
656 final boolean isSyn = isSynthetic((short) flags);
|
|
|
657
|
|
|
658 // check for source file
|
|
|
659 short classAttributeCount = 0;
|
|
|
660
|
|
|
661 if (isSyn)
|
|
|
662 classAttributeCount++;
|
|
|
663
|
|
|
664 Symbol sourceFileName = klass.getSourceFileName();
|
|
|
665 if (sourceFileName != null)
|
|
|
666 classAttributeCount++;
|
|
|
667
|
|
|
668 Symbol genericSignature = klass.getGenericSignature();
|
|
|
669 if (genericSignature != null)
|
|
|
670 classAttributeCount++;
|
|
|
671
|
|
|
672 TypeArray innerClasses = klass.getInnerClasses();
|
|
|
673 final int numInnerClasses = (int) (innerClasses.getLength() / 4);
|
|
|
674 if (numInnerClasses != 0)
|
|
|
675 classAttributeCount++;
|
|
|
676
|
|
|
677 dos.writeShort(classAttributeCount);
|
|
|
678 if (DEBUG) debugMessage("class attribute count = " + classAttributeCount);
|
|
|
679
|
|
|
680 if (isSyn)
|
|
|
681 writeSynthetic();
|
|
|
682
|
|
|
683 // write SourceFile, if any
|
|
|
684 if (sourceFileName != null) {
|
|
|
685 dos.writeShort(_sourceFileIndex);
|
|
|
686 if (DEBUG) debugMessage("source file attribute = " + _sourceFileIndex);
|
|
|
687 dos.writeInt(2);
|
|
|
688 Short index = (Short) utf8ToIndex.get(sourceFileName.asString());
|
|
|
689 dos.writeShort(index.shortValue());
|
|
|
690 if (DEBUG) debugMessage("source file name = " + index);
|
|
|
691 }
|
|
|
692
|
|
|
693 // write Signature, if any
|
|
|
694 if (genericSignature != null) {
|
|
|
695 writeGenericSignature(genericSignature.asString());
|
|
|
696 }
|
|
|
697
|
|
|
698 // write inner classes, if any
|
|
|
699 if (numInnerClasses != 0) {
|
|
|
700 dos.writeShort(_innerClassesIndex);
|
|
|
701 final int innerAttrLen = 2 /* number_of_inner_classes */ +
|
|
|
702 numInnerClasses * (
|
|
|
703 2 /* inner_class_info_index */ +
|
|
|
704 2 /* outer_class_info_index */ +
|
|
|
705 2 /* inner_class_name_index */ +
|
|
|
706 2 /* inner_class_access_flags */);
|
|
|
707 dos.writeInt(innerAttrLen);
|
|
|
708
|
|
|
709 dos.writeShort(numInnerClasses);
|
|
|
710 if (DEBUG) debugMessage("class has " + numInnerClasses + " inner class entries");
|
|
|
711
|
|
|
712 for (int index = 0; index < numInnerClasses * 4; index++) {
|
|
|
713 dos.writeShort(innerClasses.getShortAt(index));
|
|
|
714 }
|
|
|
715 }
|
|
|
716 }
|
|
|
717 }
|
