feat(init): spawn service over IPC with per-client allowance refunded on child death; up to 4 death watchers; spawntest on test image

crates/init/src/selftest.rs

@@ -121,12 +121,13 @@ fn timer_is_on_time(events: CapSlot) -> Result<(), &'static str> {
     Ok(())
 }
 
-/// Runs the test, reports, and halts the machine.
-pub fn run(storage: &mut Storage, scratch: &mut [u8]) -> ! {
-    match run_phases(storage, scratch) {
-        Ok(()) => libkos::println!("SMPTEST PASS"),
-        Err(why) => libkos::println!("SMPTEST FAIL: {}", why),
-    }
+/// Runs the hart checks; on failure reports and halts the machine, else
+/// returns so the spawn test can run (and report the whole result).
+pub fn run(storage: &mut Storage, scratch: &mut [u8]) {
+    let Err(why) = run_phases(storage, scratch) else {
+        return;
+    };
+    libkos::println!("SMPTEST FAIL: {}", why);
     match crate::devices::system_control() {
         Some(control) => syscall::halt(control),
         None => {