I am debugging a huge NDK project in Android Studio, the app crashes at semingly random times with message similar to

A/libc: Fatal Signal 11 (SIGSEGV), code 1, fault addr 0x30 in fid 22993 (Thread-99505)    

The numbers are different at times but the error is similar, and sometimes the Run tab in Android studio doesn't even show any error at all and the program just crashes with the message Application terminated

By looking around I have found that android should generate some kind of crash log similar to ones shown here

https://source.android.com/devices/tech/debug/native-crash

But I do not understand how to get them, or whether there is some setting in Android Studio that allows me to view them

How do I get crash reports like these from Android Studio?

Android Studio version 3.0.1 in Apple macbook

1 Answers

2
Alex Cohn On Best Solutions

Instead of the Run tab, look at the Logcat. Don't set the filter to your app only. There is a good chance that you will see a stack trace, like

I/DEBUG   (   31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG   (   31): Build fingerprint: 'generic/google_sdk/generic/:2.2/FRF91/43546:eng/test-keys'
I/DEBUG   (   31): pid: 351, tid: 351  >>> /data/local/ndk-tests/crasher <<<
I/DEBUG   (   31): signal 11 (SIGSEGV), fault addr 0d9f00d8
I/DEBUG   (   31):  r0 0000af88  r1 0000a008  r2 baadf00d  r3 0d9f00d8
I/DEBUG   (   31):  r4 00000004  r5 0000a008  r6 0000af88  r7 00013c44
I/DEBUG   (   31):  r8 00000000  r9 00000000  10 00000000  fp 00000000
I/DEBUG   (   31):  ip 0000959c  sp be956cc8  lr 00008403  pc 0000841e  cpsr 60000030
I/DEBUG   (   31):          #00  pc 0000841e  /data/local/ndk-tests/crasher
I/DEBUG   (   31):          #01  pc 000083fe  /data/local/ndk-tests/crasher
I/DEBUG   (   31):          #02  pc 000083f6  /data/local/ndk-tests/crasher
I/DEBUG   (   31):          #03  pc 000191ac  /system/lib/libc.so
I/DEBUG   (   31):          #04  pc 000083ea  /data/local/ndk-tests/crasher
I/DEBUG   (   31):          #05  pc 00008458  /data/local/ndk-tests/crasher
I/DEBUG   (   31):          #06  pc 0000d362  /system/lib/libc.so
I/DEBUG   (   31):

Android NDK includes a command ndk-stack that can help match the addresses with actual source files of your code, which is based on the addr2line utility in NDK toolchain.

Further instructions for understanding the stack trace: https://developer.android.com/studio/debug/stacktraces

From comments:
You may find the 'unstripped' libraries under app/build/intermediates/transforms/mergeJniLibs