Trace all method entries and exits, the exit also prints the return value, if it is of basic type

Related tags

Debugging Tools apktrace
Overview

apktrace

Trace all method entries and exits, the exit also prints the return value, if it is of basic type. The apk must have set the android:debuggable="true" flag.

By default it will trace all functions which match(prefixed) package_name.

asciicast

Updates

(07-02-2020 add native function highlighting)

Usage

>> python apktrace.py --help
usage: apktrace.py [-h] [-w 
   
    ] [-c] [-d] [--version]
                   package_name activity

Trace APK files easily

positional arguments:
  package_name          Package Name used to start Application
  activity              start activity of the Application

optional arguments:
  -h, --help            show this help message and exit
  -w 
    
     , --watchlist 
     
      
                        File containing classes to watch, (class per line)
  -c, --clear           Clear APK before start
  -d, --debug           Verbose mode
  -n, --native          Break on native method entry
  --version             Print apktrace version

In action:

()V, [00:12:33-103480] Method Exit, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> ()V, Retval: 0 [00:12:33-125597] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> onCreate(Landroid/os/Bundle;)V, [00:12:33-174525] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> calcOffset(IILjava/lang/String;)I, [00:12:33-175951] Method Exit, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> calcOffset(IILjava/lang/String;)I, Retval: 325 [00:12:33-224984] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> (Ljava/io/File;)V, [00:12:33-226337] Method Exit, Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> (Ljava/io/File;)V, Retval: 0 [00:12:33-227446] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> checkIfPinExists()Z, [00:12:33-230958] Method Exit, Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> checkIfPinExists()Z, Retval: 1 [00:12:34-578716] Method Exit, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> onCreate(Landroid/os/Bundle;)V, Retval: 0"> 
>> python apktrace.py -d com.example.firsttestapp .MainActivity
[apktrace] LOG   : start CMD "adb shell am start -D -n com.example.firsttestapp/.MainActivity"
[apktrace] LOG   : forward CMD   "adb forward tcp:33333 jdwp:14856"
[00:12:33-057312] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> 
       
        ()V, 
[00:12:33-103480] Method Exit,  Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> 
        
         ()V, Retval: 0
[00:12:33-125597] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> onCreate(Landroid/os/Bundle;)V, 
[00:12:33-174525] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> calcOffset(IILjava/lang/String;)I, 
[00:12:33-175951] Method Exit,  Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> calcOffset(IILjava/lang/String;)I, Retval: 325
[00:12:33-224984] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> 
         
          (Ljava/io/File;)V, 
[00:12:33-226337] Method Exit,  Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> 
          
           (Ljava/io/File;)V, Retval: 0
[00:12:33-227446] Method Entry, Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> checkIfPinExists()Z, 
[00:12:33-230958] Method Exit,  Thread: 10635 [main], Lcom/example/firsttestapp/PinHandling; -> checkIfPinExists()Z, Retval: 1
[00:12:34-578716] Method Exit,  Thread: 10635 [main], Lcom/example/firsttestapp/MainActivity; -> onCreate(Landroid/os/Bundle;)V, Retval: 0

TODO

  • there is a known Bug in the methodID size in the Rust implementation I wonder how this ever worked^^
  • move JdwpHandler in its own repository and use it as a git submodule, to allow easier usage also for other repositories, for example jdb++
  • implement the --watchlist argument (not possible see issue)
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