log-test

An utility for testing the behavior of android_logger crate.

Build

1. Setup cargo-ndk

   cargo install cargo-ndk
   rustup target add x86_64-linux-android
   

2. Build with cargo ndk:

   ANDROID_NDK_HOME=/usr/lib/android-sdk/ndk/27.1.12297006 cargo ndk -t x86_64 build --release
   

Run on emulator

1. Grab a Cuttlefish virtual device + Android build from Android CI. Select the last green aosp_cf_x86_64_phone trunk_staging-userdebug build and open "Artifacts" link, download:

   • aosp_cf_x86_64_phone-img-BUILDNUMBER.zip
   • cvd-host_package.tar.gz

2. Unpack both archives & start the emulator.

   cd $(mktemp -d)
   unzip ~/Downloads/aosp_cf_x86_64_phone-img-*.zip
   tar xf ~/Downloads/cvd-host_package.tar.gz
   HOME=$PWD bin/launch_cvd
   

   Once emulator launches, adb should detect it on 0.0.0.0:6520 automatically. Shut down the launch_cvd command to exit the emulator.

3. Upload & run:

   adb push ./target/x86_64-linux-android/release/log-test /data/local/tmp/
   adb shell /data/local/tmp/log-test
   

Test interaction with Android system properties

See logd README in AOSP for details.

# default: should print info+ logs in `adb logcat -s log_test`
# hint: use `adb logcat -v color` is awesome too
adb shell /data/local/tmp/log-test

# should print trace+ logs in `adb logcat -s log_test`
adb shell setprop log.tag V
adb shell /data/local/tmp/log-test

# should print warn+ logs in `adb logcat -s log_test`
adb shell setprop log.tag.log_test W
adb shell /data/local/tmp/log-test