Feature: enable native code debugging via LLDB

[davinctor]

Wix Goodness Squad Event

Description

To enable debug native (C/C++) code was added required changes to Android.mk file and build.gradles.

Changes

• Added required to build.gradle and Android.mk config to enable native debugging with LLDB;
• Fixed some warnings;

Screenshots / GIFs

Live demo of native code debug setup

output.mp4

Live debugging demo session

Test code

To enable native code debugging please put NATIVE_DEBUG_ON=TRUE line to the end of android/local.properties file:

NATIVE_DEBUG_ON=TRUE

[karol-bisztyga]

Hey! Thanks for your work! I just wanted to run this locally on my machine and couldn't set any breakpoints in c++, did it maybe happen to you as well? I'm using Android Studio 4.1

[davinctor]

@karol-bisztyga Maybe it's because something is not installed from Android tools.

Also, check please the first video where you have to enable Java+Native (or Native) debugging.

[davinctor]

@karol-bisztyga ping me if you have any troubles with debugging in Android Studio, will try to help.
BTW, I am using Android Studio v4.1.1

[karol-bisztyga]

I upgraded to studio 4.1.1, also have all those tools installed but the problem persists - I cannot set a breakpoint in c++ code, only java. I, obviously, went for dual debugger(native + java)(native alone doesn't work as well but it doesn't really make any difference as setting to native I still can set breakpoints in java code, they'd probably never be hit I guess).

[davinctor]

@karol-bisztyga I want to describe steps to do in order to archive the results on the video:

1. cd react-native-reanimated
2. npm i (or yarn)
3. cd Example
4. npm i (or yarn)
5. Open Android Studio and open react-native-reanimated/Example/android folder
6. Run gradle sync
7. Switch to Project view for project structure
8. Expand ReanimatedExample folder and go to the react-native-reanimated project (Example) dependency.

So you should run Example project and inside it, you could debug and modify react-native-reanimated dependency.

The video with steps.

I know some steps are obvious and provided just to be clear.
Now you can use Android Studio to add some breakpoints.

[Szymon20000]

Amazing Job! It was a problem that we could not solve for a long time.
Thank you!

[karol-bisztyga]

Good job, sorry, I couldn't merge this as it sadly didn't work on my environment :( I hard reset android studio and still cannot get this running but 2 people from the team fired it up so it must be just a matter of my local problems.

[davinctor]

@karol-bisztyga Leave a reply here please when you will be able to fix the issue with your local environment. Could be pretty useful!

[Ygl12337]

@karol-bisztyga Hi，Did you solve the problem ？I also encountered the same problem

[Ygl12337]

@karol-bisztyga Hi，Did you solve the problem ？I also encountered the same problem

I have solved！！
Just add "set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g")" in CMakeLists