| ## artd |
| |
| artd is a component of ART Service. It is a shim service to do tasks that |
| require elevated permissions that are not available to system_server, such as |
| manipulation of the file system and invoking dex2oat. It publishes a binder |
| interface that is internal to ART service's Java code. When it invokes other |
| binaries, it passes input and output files as FDs and drops capability before |
| exec. |
| |
| ### System properties |
| |
| artd can be controlled by the system properties listed below. Note that the list |
| doesn't include options passed to dex2oat and other processes. |
| |
| - `dalvik.vm.artd-verbose`: Log verbosity of the artd process. The syntax is the |
| same as the runtime's `-verbose` flag. |
| |
| ### The `--pre-reboot` flag |
| |
| artd can be run in Pre-reboot mode through the `--pre-reboot` flag. The |
| Pre-reboot mode is for generating outputs for Pre-reboot Dexopt. The flag does |
| not change the actual behavior, but only affects the service name, the log tag, |
| a few return checks, etc. Note that how artd addresses input files and output |
| files is solely determined by AIDL arguments and is **not** affected by the |
| `--pre-reboot` flag. |
