Use addr2line in Android

Let's say that logcat show you the following crash log (this is from one of my projects ):

 

Log Code
 

1. I/debug (31 ): **************************************** ********
2. I/debug (31): Build fingerprint: 'generic/SDK/generic: 2.3/grh55/79397: Eng/test-keys'
3. I/debug (31): PID: 378, TID: 386 >>>com. example. gltest <
   
4. I/debug (31): Signal 11 (SIGSEGV), Code 1 (segv_maperr), fault ADDR 00000000
5. I/debug (31): R0 001dbdc0 R1 00000001 R2 00000000 R3 00000000
6. I/debug (31): R4 00000000 R5 40a40000 R6 4051a424r7 42ddbee8
7. I/debug (31): R8 43661b24 R9 42ddbed0 10 42 ddbebc FP 41e462d8
8. I/debug (31): IP 00000001 SP 437919d0 LR 83a12f5d PC 8383deb4 CPSR 20000010
9. I/debug (31): #00 PC 0003deb4/data/COM. example. gltest/lib/libnativemaprender. So
   
10. I/debug (31): #01 PC 00039b76/data/COM. example. gltest/lib/libnativemaprender. So
    
11. I/debug (31): #02 PC 00017d34/system/lib/libdvm. So

I/DEBUG   (   31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***I/DEBUG   (   31): Build fingerprint: 'generic/sdk/generic:2.3/GRH55/79397:eng/test-keys'I/DEBUG   (   31): pid: 378, tid: 386  >>> com.example.gltest <<<I/DEBUG   (   31): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000000I/DEBUG   (   31):  r0 001dbdc0  r1 00000001  r2 00000000  r3 00000000I/DEBUG   (   31):  r4 00000000  r5 40a40000  r6 4051a480  r7 42ddbee8I/DEBUG   (   31):  r8 43661b24  r9 42ddbed0  10 42ddbebc  fp 41e462d8I/DEBUG   (   31):  ip 00000001  sp 436619d0  lr 83a12f5d  pc 8383deb4  cpsr 20000010I/DEBUG   (   31):          #00  pc 0003deb4  /data/data/com.example.gltest/lib/libnativemaprender.soI/DEBUG   (   31):          #01  pc 00039b76  /data/data/com.example.gltest/lib/libnativemaprender.soI/DEBUG   (   31):          #02  pc 00017d34  /system/lib/libdvm.so

 

Look at the last 3 lines; this is your callstack. 'pc' is the program counter, and the PC for stack frame #00 gives you the address where the crash occurred. this is the number to pass to addr2line.

I'm using ndk R5, so the executable I'm using is located$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin; Make sure that is in your
$PATH. The command to use looks like

CMD code
 

1. Arm-linux-androideabi-addr2line-C-f-e OBJ/local/armeabi/libxxx. So <address>

arm-linux-androideabi-addr2line -C -f -e obj/local/armeabi/libXXX.so <address>

Or, for the case above:

CMD code
 

1. Arm-linux-androideabi-addr2line-C-f-e OBJ/local/armeabi/libnativemaprender. So 0003deb4

arm-linux-androideabi-addr2line -C -f -e obj/local/armeabi/libnativemaprender.so 0003deb4

 

Which gives you the location of the crash.

Note:

• The-C flag is to demangle C ++ code
• Use the. So file under OBJ/local/armeabi, since this is the non-stripped version

Also, when using ndk R5 with a 2.3 AVD, it is actually possible to debug multithreaded code.

 

Refer:

Http://stackoverflow.com/questions/5314036/how-to-use-addr2line-in-android

Http://www.codexperiments.com/android/2010/08/tips-tricks-debugging-android-ndk-stack-traces/