baksmali.java revision e2684fa2191e04f27faba763f2bcc19593513b25
1/* 2 * [The "BSD licence"] 3 * Copyright (c) 2009 Ben Gruver 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29package org.jf.baksmali; 30 31import org.antlr.stringtemplate.StringTemplate; 32import org.antlr.stringtemplate.StringTemplateGroup; 33import org.jf.baksmali.Adaptors.ClassDefinition; 34import org.jf.baksmali.Renderers.*; 35import org.jf.dexlib.DexFile; 36import org.jf.dexlib.ClassDefItem; 37import org.jf.dexlib.StringIdItem; 38import org.jf.dexlib.Util.Deodexerant; 39import org.jf.dexlib.Util.DeodexUtil; 40 41import java.io.*; 42 43public class baksmali { 44 public static boolean noParameterRegisters = false; 45 public static boolean useLocalsDirective = false; 46 public static boolean useIndexedLabels = false; 47 public static DeodexUtil deodexUtil = null; 48 49 public static void disassembleDexFile(DexFile dexFile, Deodexerant deodexerant, String outputDirectory, 50 boolean noParameterRegisters, boolean useLocalsDirective, 51 boolean useIndexedLabels) 52 { 53 baksmali.noParameterRegisters = noParameterRegisters; 54 baksmali.useLocalsDirective = useLocalsDirective; 55 baksmali.useIndexedLabels = useIndexedLabels; 56 57 if (deodexerant != null) { 58 baksmali.deodexUtil = new DeodexUtil(deodexerant); 59 } 60 61 File outputDirectoryFile = new File(outputDirectory); 62 if (!outputDirectoryFile.exists()) { 63 if (!outputDirectoryFile.mkdirs()) { 64 System.err.println("Can't create the output directory " + outputDirectory); 65 System.exit(1); 66 } 67 } 68 69 //load and initialize the templates 70 InputStream templateStream = baksmali.class.getClassLoader().getResourceAsStream("templates/baksmali.stg"); 71 StringTemplateGroup templates = new StringTemplateGroup(new InputStreamReader(templateStream)); 72 templates.registerRenderer(Long.class, new LongRenderer()); 73 templates.registerRenderer(Integer.class, new IntegerRenderer()); 74 templates.registerRenderer(Short.class, new ShortRenderer()); 75 templates.registerRenderer(Byte.class, new ByteRenderer()); 76 templates.registerRenderer(Float.class, new FloatRenderer()); 77 templates.registerRenderer(Character.class, new CharRenderer()); 78 templates.registerRenderer(StringIdItem.class, new StringIdItemRenderer()); 79 80 81 for (ClassDefItem classDefItem: dexFile.ClassDefsSection.getItems()) { 82 /** 83 * The path for the disassembly file is based on the package name 84 * The class descriptor will look something like: 85 * Ljava/lang/Object; 86 * Where the there is leading 'L' and a trailing ';', and the parts of the 87 * package name are separated by '/' 88 */ 89 90 String classDescriptor = classDefItem.getClassType().getTypeDescriptor(); 91 92 //validate that the descriptor is formatted like we expect 93 if (classDescriptor.charAt(0) != 'L' || 94 classDescriptor.charAt(classDescriptor.length()-1) != ';') { 95 System.err.println("Unrecognized class descriptor - " + classDescriptor + " - skipping class"); 96 continue; 97 } 98 99 //trim off the leading L and trailing ; 100 classDescriptor = classDescriptor.substring(1, classDescriptor.length()-1); 101 102 //trim off the leading 'L' and trailing ';', and get the individual package elements 103 String[] pathElements = classDescriptor.split("/"); 104 105 //build the path to the smali file to generate for this class 106 StringBuilder smaliPath = new StringBuilder(outputDirectory); 107 for (String pathElement: pathElements) { 108 smaliPath.append(File.separatorChar); 109 smaliPath.append(pathElement); 110 } 111 smaliPath.append(".smali"); 112 113 File smaliFile = new File(smaliPath.toString()); 114 115 //create and initialize the top level string template 116 ClassDefinition classDefinition = new ClassDefinition(templates, classDefItem); 117 118 StringTemplate smaliFileST = classDefinition.makeTemplate(); 119 120 //generate the disassembly 121 String output = smaliFileST.toString(); 122 123 //write the disassembly 124 FileWriter writer = null; 125 try 126 { 127 File smaliParent = smaliFile.getParentFile(); 128 if (!smaliParent.exists()) { 129 if (!smaliParent.mkdirs()) { 130 System.err.println("Unable to create directory " + smaliParent.toString() + " - skipping class"); 131 continue; 132 } 133 } 134 135 if (!smaliFile.exists()){ 136 if (!smaliFile.createNewFile()) { 137 System.err.println("Unable to create file " + smaliFile.toString() + " - skipping class"); 138 continue; 139 } 140 } 141 142 writer = new FileWriter(smaliFile); 143 writer.write(output); 144 } catch (Throwable ex) { 145 System.err.println("\n\nError occured while disassembling class " + classDescriptor.replace('/', '.') + " - skipping class"); 146 ex.printStackTrace(); 147 } 148 finally 149 { 150 if (writer != null) { 151 try { 152 writer.close(); 153 } catch (Throwable ex) { 154 System.err.println("\n\nError occured while closing file " + smaliFile.toString()); 155 ex.printStackTrace(); 156 } 157 } 158 } 159 } 160 } 161} 162