How to debug Rust apps on Android with CLion

Say you've built and deployed a Rust library on Android following these steps. In order to debug via rust-gdb or graphically with CLion do the following:

• Stop gradle from stripping your Rust .so files of debug symbols by adding packagingOptions.doNotStrip "**/*.so" to app/build.gradle

• Push the gdbserver binary from Android NDK's prebuild directory to the device:

~/Android/Sdk/ndk-bundle/prebuilt/android-x86_64/gdbserver$ ~/Android/Sdk/platform-tools/adb push gdbserver /data/local/tmp
~/Android/Sdk/platform-tools/adb shell "chmod 777 /data/local/tmp/gdbserver"

• Restart adbd as root:

~/Android/Sdk/platform-tools/adb root

• Forward a port that you will use for gdbserver:

~/Android/Sdk/platform-tools/adb forward tcp:1337 tcp:1337

• Attach gdbserver to the process you wish to debug:

~/Android/Sdk/platform-tools/adb shell
generic_x86_64:/ # su
generic_x86_64:/ # set enforce 0
generic_x86_64:/ # /data/local/tmp/gdbserver :1337 --attach $(ps -A | grep your.android.application.id | awk '{print $2}')

• Either run rust-gdb or set up CLion's "Remote GDB" configuration with:

target remote tcp:localhost:1337

• Enjoy!