1 <!doctype html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 <html> 3 <head> 4 <meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> 5 <meta http-equiv="content-style-type" content="text/css"> 6 <link rel="stylesheet" type="text/css" href="../style.css"> 7 <title>ReTrace Introduction</title> 8 </head> 9 <body> 10 11 <script type="text/javascript" language="JavaScript"> 12 <!-- 13 if (window.self==window.top) 14 document.write('<a class="largebutton" target="_top" href="../../index.html#manual/retrace/introduction.html">ProGuard index</a> <a class="largebutton" target="_top" href="http://www.saikoa.com/dexguard">DexGuard</a> <a class="largebutton" target="_top" href="http://www.saikoa.com/">Saikoa</a> <a class="largebutton" target="other" href="http://sourceforge.net/projects/proguard/">Sourceforge</a>') 15 //--> 16 </script> 17 <noscript> 18 <a class="largebutton" target="_top" href="../../index.html#manual/retrace/introduction.html">ProGuard index</a> 19 <a class="largebutton" target="_top" href="http://www.saikoa.com/dexguard">DexGuard</a> 20 <a class="largebutton" target="_top" href="http://www.saikoa.com/">Saikoa</a> 21 <a class="largebutton" target="other" href="http://sourceforge.net/projects/proguard/">Sourceforge</a> 22 </noscript> 23 24 <h2>Introduction</h2> 25 26 <b>ReTrace</b> is a companion tool for <b>ProGuard</b> that 'de-obfuscates' 27 stack traces. 28 <p> 29 When an obfuscated program throws an exception, the resulting stack trace 30 typically isn't very informative. Class names and method names have been 31 replaced by short meaningless strings. Source file names and line numbers are 32 missing altogether. While this may be intentional, it can also be inconvenient 33 when debugging problems. 34 <p> 35 36 <table class="diagram" align="center"> 37 38 <tr> 39 <td rowspan="1" class="lightblock">Original code</td> 40 <td class="transparentblock">- <b>ProGuard</b> →</td> 41 <td rowspan="1" class="lightblock">Obfuscated code</td> 42 </tr> 43 44 <tr> 45 <td rowspan="3" class="transparentblock"></td> 46 <td class="transparentblock">↓</td> 47 <td class="transparentblock">↓</td> 48 </tr> 49 50 <tr> 51 <td class="whiteblock">Mapping file</td> 52 <td class="transparentblock">↓</td> 53 </tr> 54 55 <tr> 56 <td class="transparentblock">↓</td> 57 <td class="transparentblock">↓</td> 58 </tr> 59 60 <tr> 61 <td class="whiteblock">Readable stack trace</td> 62 <td class="transparentblock">← <b>ReTrace</b> -</td> 63 <td class="whiteblock">Obfuscated stack trace</td> 64 </tr> 65 66 </table> 67 <p> 68 ReTrace can read an obfuscated stack trace and restore it to what it would 69 look like without obfuscation. The restoration is based on the mapping file 70 that ProGuard can write out during obfuscation. The mapping file links the 71 original class names and class member names to their obfuscated names. 72 73 <hr /> 74 <address> 75 Copyright © 2002-2014 76 <a target="other" href="http://www.lafortune.eu/">Eric Lafortune</a> @ <a target="top" href="http://www.saikoa.com/">Saikoa</a>. 77 </address> 78 </body> 79 </html> 80 81
