1f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)/* 2f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * ProGuard -- shrinking, optimization, obfuscation, and preverification 3f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * of Java bytecode. 4f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * 5f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu) 6f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * 7f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * This program is free software; you can redistribute it and/or modify it 8f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * under the terms of the GNU General Public License as published by the Free 9f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * Software Foundation; either version 2 of the License, or (at your option) 10f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * any later version. 11f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * 12f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * This program is distributed in the hope that it will be useful, but WITHOUT 13f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * more details. 161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * 171320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * You should have received a copy of the GNU General Public License along 181320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * with this program; if not, write to the Free Software Foundation, Inc., 191320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci */ 211320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tuccipackage proguard.optimize; 221320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 231320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciimport proguard.classfile.*; 241320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciimport proguard.classfile.attribute.*; 251320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciimport proguard.classfile.attribute.annotation.*; 261320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciimport proguard.classfile.attribute.preverification.*; 271320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciimport proguard.classfile.attribute.visitor.AttributeVisitor; 281320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciimport proguard.classfile.util.ClassUtil; 291320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 301320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/** 311320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * This AttributeVisitor delegates its call to another AttributeVisitor, and 321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * prints out the code if the other visitor has changed it. 331320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci * 34f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) * @author Eric Lafortune 35f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) */ 36f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)public class ChangedCodePrinter 37f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)implements AttributeVisitor 38f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles){ 39f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) private final AttributeVisitor attributeVisitor; 40f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 41f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 42f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) public ChangedCodePrinter(AttributeVisitor attributeVisitor) 43f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) { 44f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) this.attributeVisitor = attributeVisitor; 45f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 46f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 47f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 48f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) // Implementations for AttributeVisitor. 49f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 50f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 51f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) public void visitUnknownAttribute(Clazz clazz, UnknownAttribute unknownAttribute) 52f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) { 53f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) attributeVisitor.visitUnknownAttribute(clazz, unknownAttribute); 54f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 55f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 56f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 57f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) public void visitBootstrapMethodsAttribute(Clazz clazz, BootstrapMethodsAttribute bootstrapMethodsAttribute) 58f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) { 59f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) attributeVisitor.visitBootstrapMethodsAttribute(clazz, bootstrapMethodsAttribute); 60f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 61f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 62f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 63f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) public void visitSourceFileAttribute(Clazz clazz, SourceFileAttribute sourceFileAttribute) 64f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) { 65f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) attributeVisitor.visitSourceFileAttribute(clazz, sourceFileAttribute); 66f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 67f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 68f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 69f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) public void visitSourceDirAttribute(Clazz clazz, SourceDirAttribute sourceDirAttribute) 70f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) { 71f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) attributeVisitor.visitSourceDirAttribute(clazz, sourceDirAttribute); 72f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 73f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 74f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 75f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) public void visitInnerClassesAttribute(Clazz clazz, InnerClassesAttribute innerClassesAttribute) 761320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci { 771320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci attributeVisitor.visitInnerClassesAttribute(clazz, innerClassesAttribute); 78f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) } 79f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 80f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) 81 public void visitEnclosingMethodAttribute(Clazz clazz, EnclosingMethodAttribute enclosingMethodAttribute) 82 { 83 attributeVisitor.visitEnclosingMethodAttribute(clazz, enclosingMethodAttribute); 84 } 85 86 87 public void visitDeprecatedAttribute(Clazz clazz, DeprecatedAttribute deprecatedAttribute) 88 { 89 attributeVisitor.visitDeprecatedAttribute(clazz, deprecatedAttribute); 90 } 91 92 93 public void visitSyntheticAttribute(Clazz clazz, SyntheticAttribute syntheticAttribute) 94 { 95 attributeVisitor.visitSyntheticAttribute(clazz, syntheticAttribute); 96 } 97 98 99 public void visitSignatureAttribute(Clazz clazz, SignatureAttribute syntheticAttribute) 100 { 101 attributeVisitor.visitSignatureAttribute(clazz, syntheticAttribute); 102 } 103 104 105 public void visitDeprecatedAttribute(Clazz clazz, Field field, DeprecatedAttribute deprecatedAttribute) 106 { 107 attributeVisitor.visitDeprecatedAttribute(clazz, field, deprecatedAttribute); 108 } 109 110 111 public void visitSyntheticAttribute(Clazz clazz, Field field, SyntheticAttribute syntheticAttribute) 112 { 113 attributeVisitor.visitSyntheticAttribute(clazz, field, syntheticAttribute); 114 } 115 116 117 public void visitSignatureAttribute(Clazz clazz, Field field, SignatureAttribute syntheticAttribute) 118 { 119 attributeVisitor.visitSignatureAttribute(clazz, field, syntheticAttribute); 120 } 121 122 123 public void visitDeprecatedAttribute(Clazz clazz, Method method, DeprecatedAttribute deprecatedAttribute) 124 { 125 attributeVisitor.visitDeprecatedAttribute(clazz, method, deprecatedAttribute); 126 } 127 128 129 public void visitSyntheticAttribute(Clazz clazz, Method method, SyntheticAttribute syntheticAttribute) 130 { 131 attributeVisitor.visitSyntheticAttribute(clazz, method, syntheticAttribute); 132 } 133 134 135 public void visitSignatureAttribute(Clazz clazz, Method method, SignatureAttribute syntheticAttribute) 136 { 137 attributeVisitor.visitSignatureAttribute(clazz, method, syntheticAttribute); 138 } 139 140 141 public void visitConstantValueAttribute(Clazz clazz, Field field, ConstantValueAttribute constantValueAttribute) 142 { 143 attributeVisitor.visitConstantValueAttribute(clazz, field, constantValueAttribute); 144 } 145 146 147 public void visitExceptionsAttribute(Clazz clazz, Method method, ExceptionsAttribute exceptionsAttribute) 148 { 149 attributeVisitor.visitExceptionsAttribute(clazz, method, exceptionsAttribute); 150 } 151 152 153 public void visitStackMapAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapAttribute stackMapAttribute) 154 { 155 attributeVisitor.visitStackMapAttribute(clazz, method, codeAttribute, stackMapAttribute); 156 } 157 158 159 public void visitStackMapTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapTableAttribute stackMapTableAttribute) 160 { 161 attributeVisitor.visitStackMapTableAttribute(clazz, method, codeAttribute, stackMapTableAttribute); 162 } 163 164 165 public void visitLineNumberTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberTableAttribute lineNumberTableAttribute) 166 { 167 attributeVisitor.visitLineNumberTableAttribute(clazz, method, codeAttribute, lineNumberTableAttribute); 168 } 169 170 171 public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute) 172 { 173 attributeVisitor.visitLocalVariableTableAttribute(clazz, method, codeAttribute, localVariableTableAttribute); 174 } 175 176 177 public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute) 178 { 179 attributeVisitor.visitLocalVariableTypeTableAttribute(clazz, method, codeAttribute, localVariableTypeTableAttribute); 180 } 181 182 183 public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute) 184 { 185 attributeVisitor.visitRuntimeVisibleAnnotationsAttribute(clazz, runtimeVisibleAnnotationsAttribute); 186 } 187 188 189 public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute) 190 { 191 attributeVisitor.visitRuntimeInvisibleAnnotationsAttribute(clazz, runtimeInvisibleAnnotationsAttribute); 192 } 193 194 195 public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, Field field, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute) 196 { 197 attributeVisitor.visitRuntimeVisibleAnnotationsAttribute(clazz, field, runtimeVisibleAnnotationsAttribute); 198 } 199 200 201 public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, Field field, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute) 202 { 203 attributeVisitor.visitRuntimeInvisibleAnnotationsAttribute(clazz, field, runtimeInvisibleAnnotationsAttribute); 204 } 205 206 207 public void visitRuntimeVisibleAnnotationsAttribute(Clazz clazz, Method method, RuntimeVisibleAnnotationsAttribute runtimeVisibleAnnotationsAttribute) 208 { 209 attributeVisitor.visitRuntimeVisibleAnnotationsAttribute(clazz, method, runtimeVisibleAnnotationsAttribute); 210 } 211 212 213 public void visitRuntimeInvisibleAnnotationsAttribute(Clazz clazz, Method method, RuntimeInvisibleAnnotationsAttribute runtimeInvisibleAnnotationsAttribute) 214 { 215 attributeVisitor.visitRuntimeInvisibleAnnotationsAttribute(clazz, method, runtimeInvisibleAnnotationsAttribute); 216 } 217 218 219 public void visitRuntimeVisibleParameterAnnotationsAttribute(Clazz clazz, Method method, RuntimeVisibleParameterAnnotationsAttribute runtimeVisibleParameterAnnotationsAttribute) 220 { 221 attributeVisitor.visitRuntimeVisibleParameterAnnotationsAttribute(clazz, method, runtimeVisibleParameterAnnotationsAttribute); 222 } 223 224 225 public void visitRuntimeInvisibleParameterAnnotationsAttribute(Clazz clazz, Method method, RuntimeInvisibleParameterAnnotationsAttribute runtimeInvisibleParameterAnnotationsAttribute) 226 { 227 attributeVisitor.visitRuntimeInvisibleParameterAnnotationsAttribute(clazz, method, runtimeInvisibleParameterAnnotationsAttribute); 228 } 229 230 231 public void visitAnnotationDefaultAttribute(Clazz clazz, Method method, AnnotationDefaultAttribute annotationDefaultAttribute) 232 { 233 attributeVisitor.visitAnnotationDefaultAttribute(clazz, method, annotationDefaultAttribute); 234 } 235 236 237 public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute) 238 { 239 byte[] code = codeAttribute.code; 240 byte[] oldCode = new byte[code.length]; 241 242 // Copy the current code. 243 System.arraycopy(code, 0, oldCode, 0, codeAttribute.u4codeLength); 244 245 // Delegate to the real visitor. 246 attributeVisitor.visitCodeAttribute(clazz, method, codeAttribute); 247 248 // Check if the code has changed. 249 if (codeHasChanged(codeAttribute, oldCode)) 250 { 251 printChangedCode(clazz, method, codeAttribute, oldCode); 252 } 253 } 254 255 256 // Small utility methods. 257 258 private boolean codeHasChanged(CodeAttribute codeAttribute, byte[] oldCode) 259 { 260 if (oldCode.length != codeAttribute.u4codeLength) 261 { 262 return true; 263 } 264 265 for (int index = 0; index < codeAttribute.u4codeLength; index++) 266 { 267 if (oldCode[index] != codeAttribute.code[index]) 268 { 269 return true; 270 } 271 } 272 273 return false; 274 } 275 276 277 private void printChangedCode(Clazz clazz, 278 Method method, 279 CodeAttribute codeAttribute, 280 byte[] oldCode) 281 { 282 System.out.println("Class "+ClassUtil.externalClassName(clazz.getName())); 283 System.out.println("Method "+ClassUtil.externalFullMethodDescription(clazz.getName(), 284 0, 285 method.getName(clazz), 286 method.getDescriptor(clazz))); 287 288 for (int index = 0; index < codeAttribute.u4codeLength; index++) 289 { 290 System.out.println( 291 (oldCode[index] == codeAttribute.code[index]? " -- ":" => ")+ 292 index+": "+ 293 Integer.toHexString(0x100|oldCode[index] &0xff).substring(1)+" "+ 294 Integer.toHexString(0x100|codeAttribute.code[index]&0xff).substring(1)); 295 } 296 } 297} 298