nkh-lab / ndk-dlopen

Android Studio example project for testing native libraries dynamic loading

ndk-dlopen

Android Studio example project for testing native libraries dynamic loading by using:

• dlopen()/dlsym()/dlclose()
• boost::dll::import_alias()

Environment

• Android Studio
• CMake 3.12 (for boost-cmake)

Dependencies

Git submodule projects:

• boost-cmake: Used CMake adapted boost (https://github.com/Orphis/boost-cmake).

Project setup

1. Clone main git project:

git clone https://github.com/nkh-lab/ndk-dlopen.git

2. Clone submodule projects:

git submodule update --init

Build and run

1. Open project in Android Studio
2. Build and run on emulator
3. Expected application output in logcat:

2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: dlopen(/data/app/~~n2LWrvrFpbL8tiBLY82sVg==/com.example.dlopen-MRIG2JQE0v9GAY3DxRNsTA==/lib/x86/libplugin.so): OK
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: pcount_c(): 1
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: pcount_c(): 2
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: pcount_c(): 3
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: pcount_cpp(): 1
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: pcount_cpp(): 2
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: pcount_cpp(): 3
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: (*pcount_alias)(): 4
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: (*pcount_alias)(): 5
2022-01-17 16:43:58.548 8779-8779/com.example.dlopen I/native-lib.cpp: (*pcount_alias)(): 6
2022-01-17 16:43:58.549 8779-8779/com.example.dlopen I/native-lib.cpp: boost_alias_count(): 1
2022-01-17 16:43:58.549 8779-8779/com.example.dlopen I/native-lib.cpp: boost_alias_count(): 2
2022-01-17 16:43:58.549 8779-8779/com.example.dlopen I/native-lib.cpp: boost_alias_count(): 3
2022-01-17 16:43:58.549 8779-8779/com.example.dlopen W/native-lib.cpp: dlopen(libaudioflinger.so): NOK