Question

In my app i got crash report

Exception Type:  EXC_BAD_ACCESS (SIGBUS)

Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000

Crashed Thread:  7

In Thread 7 :


Thread 7 Crashed:

0   CoreFoundation                  0x3728ba96 0x37278000 + 80534

1   CFNetwork                       0x36617b84 0x36616000 + 7044

2   CFNetwork                       0x36617af6 0x36616000 + 6902

3   MusicBandApp                    0x0000bbfc 0x1000 + 44028

4   MusicBandApp                    0x0000b740 0x1000 + 42816

5   Foundation                      0x33b88382 0x33b6b000 + 119682

6   Foundation                      0x33bfa5c6 0x33b6b000 + 587206

7   libsystem_c.dylib               0x3579530a 0x35762000 + 209674

8   libsystem_c.dylib               0x35796bb4 0x35762000 + 215988

but can”t show particular crash file name & line number.

How can sybolicate this crash report.

Answer 1

We need a file called symbolitecrash to process this file. This file can be located in /Developer/Platforms/iPhoneOS.platform/Developer/Library/PrivateFrameworks/DTDeviceKit.framework/Versions/A/Resources

1. Open the Terminal.

2. Copy symbolitecrash file to the default location shown when the terminal is opened.

   eg. Terminal window :-

   Last login: Wed Jun 22 15:28:21 on ttys000
   UserMM:~ user$

   Here, the default location is the directory “user”.

3. Running this script with the -h option provides the minimal help:

   UserMM:~ user$ symbolitecrash -h

   usage:

   /usr/local/bin/symbolicatecrash [-Ah] [-o ] LOGFILE [SYMBOL_PATH …]

   Symbolicates a crashdump LOGFILE which may be “-” to refer to stdin. By default,

   all heuristics will be employed in an attempt to symbolicate all addresses.

   Additional symbol files can be found under specified directories.

   Options:

   -A Only symbolicate the application, not libraries

   -o If specified, the symbolicated log will be written to OUTPUT_FILE (defaults to stdout)

   -h Display this message

   -v Verbose

4. Place the .crash file in the same location where symbolitecrash file is copied.

5. To add symbols to the crash log you need the dSYM file generated by the linker when you compiled your application for AppStore. In other words, when you build for AppStore you should keep the dSYM package in a safe place backed up by Time Machine. This is very important. You should keep a copy of the dSYM for each version of your application ever shipped. If you have the package, translating code offsets to function names with line numbers has never been easier:

$ symbolicatecrash MiMo_2011-06-22-143801_Anands-Ipod.crash myApp.app.dSYM > myApp_2011-06-22-143801_Anands-Ipod1.crash

myApp_2011-06-22-143801_Anands-Ipod1.crash is the new crash file generated in the same location.

Here is the result:

Thread 0 Crashed:
0   libobjc.A.dylib           0x300c87ec objc_msgSend + 20
1   myApp                      0x00006434 -[BoardView setSelectedPiece:] (BoardView.m                              :321)