Question How can I debug my Android native C++ library for Unity3D?

I have created a JUCE based audio library in C++ (originally as a windows DLL)

I have successfully built it into an AAR library with Android Studio

I can successfully run it in a Unity3D build for Android.

I can get the debugger messages back to LogCat

However, I really need to step through some part of the native C++ code with a managed debugger. ( I know how use a debugger for the c# for unity on android)

I've searched for days but cannot find an answer.

Unity3D 2018.3.11f1

Android Studio 3.4.1 Build #AI-183.6156.11.34.5522156, built on May 1, 2019 JRE: 1.8.0_152-release-1343-b01 amd64 JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o Windows 10 10.0

 

Thanks.

I know how to set the symbols but can you elaborate on "if those were separated from library files" I'm not sure what you're suggesting

 

OK, thanks again. I'm with you now. They're not stripped.

However, I do have another question if you have the patience for it.

When my exported app comes into Android Studio, the native code is the .aar so I'm a little confused how I should set breakpoints?

Should I bring my library into the exported app? or the exported app into the library? etc.

 

OK, I built the AAR. (I know it a zip too - but a good tip!)

So I just need to copy the source files into the exported project into the /libs folder? sorry if this seems obvious, just a complete android nube except for vanilla builds.

 

I really appreciate your replies and I'm so sorry for seeming dumber...


so I have two projects open - my Unity-export app & my c++native library

what am dragging and where am I dropping it?

e.g drag my source folder from the library to the libs folder of the export app, etc

 

OK, I get you now!

I've done that, but it doesn't hit the breakpoint I set - although I know from the logcat that it must have past that point (a Debug.Log() command from unity to the native code prints successfully)

EDIT: my error, I was setting the wrong path for the symbols.

It works now.

Thanks so much for your help @Tomas1856

 

@garrilla amazing you got this working! Could you share what the path to your symbols was? I seem to have the same setup as you describe. I want to attach the native debugger to my native DLL in my Unity project running on Android. I'm unsure where to point it to for symbols.

 

1) go into 'edit configurations' of your lib (this is is the drop down menu next to the build-hammer)

2) under 'debugger' add a Symbol Directory - then select 'armeabi-v7a' by navigating to

[my root path to my lib]\Builds\Android\lib\build\intermediates\cmake\debug_\obj\armeabi-v7a

hope that helps

 

your post give me courage

i'm almost give up on similar issue

that i want to break il2cpp files on android studio

i read this post https://forum.unity.com/threads/debugging-android-il2cpp-builds.493296/#post-3210398

but its not work for me

i try breakpoint but lldb didn't match the source code

and try to command `image list`

and there no il2cpp.so

my extra setting is below

rename libil2cpp.so.debug to libil2cpp.so and replace to

\AndroidStudio\appname\src\main\jniLibs\armeabi-v7a\libil2cpp.so

so symbolic file be involved

and specify symbol Directories in Edit Configuration to above directory

how do i debug il2cpp file on lldb of android studio?


@JoshPeterson @Tomas1856

 

it's great news

but we are in live service using 2018.4.10f version for 1 year

so i'm afraid to update to 2010 version

at this time. i didn't touch the directories. and specify symbol directories outside android studio where ilil2cpp.so.debug file exist
and change il2cpp.so.debug to il2cpp.so

run this setup has same result

'image list' not showing libil2cpp.so and libmain.so, libunity.so

lookup some symbol is nothing to print @Tomas1856

 

yes. the path inside symbol directories is where libil2cpp.so live and libil2cpp.so is copied from libil2cpp.so.debug



`target symbols add <path_to_symbol> to force symbol load`



add symbols forced has error

2 settings not work. thanks

@Tomas1856

 

i create simple project for 2020.1.0 to test debugging on android with new feature

and it's seem to have same issue



find some function name that generated by il2cpp and copy then paste to lldb

i test it on x86 android device (windows environment)

Sorry if I bothered you. But please help me as I have to solve this problem. thanks

@Tomas1856

 

i'm using LDPlayer(https://en.ldplayer.net/) that run on windows. (ie. running device of Virtual Device highlight)

is it emulator?

(our serivce is mobile mmorpg. lots of player are playing game on LDPlayer for long period connected)

i didn't select x86 for building apk



but i read this https://commonsware.com/blog/2013/11/21/libhoudini-what-it-means-for-developers.html

so i think arm binary can run on x86




can't i debug that environment?

if i change device to real mobile device, then i can break some function?

thanks

@Tomas1856

 

great thank a lot your concern

i will do step by step

 

Thanks for clarification

yes. that's the reason. i do it same thing as you do and it's not like your result

@Tomas1856

 

Hi I made unity native audio plugin with the juce library. it works well in mac and windows. I want to export it for android. this thread seems to contain a lot of awesome information. I have learnt that i have to build the plugin as a shared library inorder to use it in an android application. could anyone provide information on how i can build a shared library for android from my juce plugin project?

 

I do those steps by using unity 2022.3.22f1, and android studio 2023. set symbol directories to android\unityLibrary\symbols but I can't breakpoints c++ file, and use image list cmd in lldb,there are not show any libunity or libmain, libil2cpp. If I target add symbols by manual, they just say there is no module.
any suggestion???