I'm testing my app, which has a lot of C++, in debug. Even though it's compiled in debug, and the C++ code is compiled by my own app (thus is compiled in debug mode also), I get crash backtraces like this:
09-23 19:16:32.672 14123 14123 F DEBUG : Build fingerprint: 'motorola/griffin/griffin:8.0.0/OPL27.76-71-2-3/3:user/release-keys'
09-23 19:16:32.672 14123 14123 F DEBUG : Revision: 'p3b0'
09-23 19:16:32.672 14123 14123 F DEBUG : ABI: 'arm64'
09-23 19:16:32.672 14123 14123 F DEBUG : pid: 14078, tid: 14078, name: my_flutter_app >>> com.sergio_lever.my_flutter_app <<<
09-23 19:16:32.672 14123 14123 F DEBUG : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
09-23 19:16:32.675 14123 14123 F DEBUG : Abort message: 'terminating with uncaught exception of type std::bad_optional_access: bad_optional_access'
09-23 19:16:32.675 14123 14123 F DEBUG : x0 0000000000000000 x1 00000000000036fe x2 0000000000000006 x3 0000000000000008
09-23 19:16:32.675 14123 14123 F DEBUG : x4 fefeff7ee760d21f x5 fefeff7ee760d21f x6 fefeff7ee760d21f x7 7f7f7f7fff7fff7f
09-23 19:16:32.675 14123 14123 F DEBUG : x8 0000000000000083 x9 18e2b086a928bab4 x10 0000000000000000 x11 0000000000000001
09-23 19:16:32.675 14123 14123 F DEBUG : x12 ffffffffffffffff x13 0000000000000001 x14 0024287419403a06 x15 0000260af954a2fc
09-23 19:16:32.675 14123 14123 F DEBUG : x16 0000007fb44632f8 x17 0000007fb44049d4 x18 0000007fe861da5c x19 00000000000036fe
09-23 19:16:32.675 14123 14123 F DEBUG : x20 00000000000036fe x21 0000007fe861d828 x22 ffffff80ffffffc8 x23 0000007fe861d8e0
09-23 19:16:32.676 14123 14123 F DEBUG : x24 0000007fe861d7c0 x25 0000007fe861d800 x26 0000000000000000 x27 0000000000000001
09-23 19:16:32.676 14123 14123 F DEBUG : x28 0000000000000001 x29 0000007fe861d730 x30 0000007fb43b8d24
09-23 19:16:32.676 14123 14123 F DEBUG : sp 0000007fe861d6f0 pc 0000007fb44049dc pstate 0000000060000000
09-23 19:16:32.682 14123 14123 F DEBUG :
09-23 19:16:32.682 14123 14123 F DEBUG : backtrace:
09-23 19:16:32.682 14123 14123 F DEBUG : #00 pc 00000000000699dc /system/lib64/libc.so (tgkill+8)
09-23 19:16:32.682 14123 14123 F DEBUG : #01 pc 000000000001dd20 /system/lib64/libc.so (abort+88)
09-23 19:16:32.682 14123 14123 F DEBUG : #02 pc 000000000009fffc /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0x3853000)
09-23 19:16:32.682 14123 14123 F DEBUG : #03 pc 00000000000a0154 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0x3853000)
09-23 19:16:32.682 14123 14123 F DEBUG : #04 pc 000000000009d044 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0x3853000)
09-23 19:16:32.682 14123 14123 F DEBUG : #05 pc 000000000009c914 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0x3853000)
09-23 19:16:32.682 14123 14123 F DEBUG : #06 pc 000000000009c870 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0x3853000)
09-23 19:16:32.682 14123 14123 F DEBUG : #07 pc 00000000007a25d0 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0xaef5000)
09-23 19:16:32.684 14123 14123 F DEBUG : #08 pc 00000000007a0ad4 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0xaef5000)
09-23 19:16:32.684 14123 14123 F DEBUG : #09 pc 00000000007a07e8 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0xaef5000)
09-23 19:16:32.684 14123 14123 F DEBUG : #10 pc 00000000007a0b50 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0xaef5000)
09-23 19:16:32.684 14123 14123 F DEBUG : #11 pc 00000000007a1890 /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/base.apk (offset 0xaef5000)
09-23 19:16:32.684 14123 14123 F DEBUG : #12 pc 000000000000c46c /data/app/com.sergio_lever.my_flutter_app-05UKts6YyVXBufMPQhp4Ew==/oat/arm64/base.odex (offset 0xa000)
09-23 19:16:33.509 1136 1136 E /system/bin/tombstoned: Tombstone written to: /data/tombstones//tombstone_00
I'm supposing that both on release and debug mode I get the same backtrace. So, if some user of the app sends me this backtrace (which I believe is sent through google play send feedback option when the app crashes), is there a way for me to find the actual names of the functions? Maybe looking at the offsets?
If it's possible, why wont logcat show the true names of the functions in the backtrace at least for my debug version of the app?
UPDATE:
I found ndk-stack utility, I tried:
adb logcat | $ANDROID_NDK_HOME/ndk-stack -sym $PWD/android/app/.cxx/cmake/debug/armeabi-v7a/
Android NDK site recommends
adb logcat | $NDK/ndk-stack -sym $PROJECT_PATH/obj/local/armeabi-v7a
but I did not find $PROJECT_PATH/obj/local/armeabi-v7a
The ndk-stack tool gives me this output:
Build fingerprint: 'motorola/griffin/griffin:8.0.0/OPL27.76-71-2-3/3:user/release-keys'
#00 0x00000000007b89b4 /data/app/com.sergio.my_flutter_app-P3kaX9v7DTNaKtQvm2Eotg==/base.apk (offset 0x4716000)
#01 0x00000000007b9ca0 /data/app/com.sergio.my_flutter_app-P3kaX9v7DTNaKtQvm2Eotg==/base.apk (offset 0x4716000)
#02 0x00000000007bb03c /data/app/com.sergio.my_flutter_app-P3kaX9v7DTNaKtQvm2Eotg==/base.apk (offset 0x4716000)
#03 0x00000000007baf78 /data/app/com.sergio.my_flutter_app-P3kaX9v7DTNaKtQvm2Eotg==/base.apk (offset 0x4716000)
#04 0x00000000007bac18 /data/app/com.sergio.my_flutter_app-P3kaX9v7DTNaKtQvm2Eotg==/base.apk (offset 0x4716000)
#05 0x000000000006637c /system/lib64/libc.so (_ZL15__pthread_startPv+36)
#06 0x000000000001f178 /system/lib64/libc.so (__start_thread+68)
Crash dump is completed
but this does not show the name of the functions in the backtrace.
Possible reason: there are no .o or .a files in $PWD/android/app/.cxx/cmake/debug/armeabi-v7a/
I also tried
adb logcat | $ANDROID_NDK_HOME/ndk-stack -sym $PWD/build/app/intermediates/merged_native_libs/debug/out/lib/armeabi-v7a
In that folder, indeed there exists my .so file so I think it's the right place. However I get the same output as before: no names for the backtrace functins.
from Is it possible to locate function names from a C++ backtrace from Android app?
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