ptos: thread: Bugcheck if root thread killed

Signed-off-by: Chloe M. <chloe@mensia.org>

service/ptos/ps/thread.c

@@ -11,6 +11,7 @@
 #include <hal/thread.h>
 #include <hal/prim.h>
 #include <hal/kpcr.h>
+#include <ke/bugcheck.h>
 #include <ex/pool.h>
 #include <atomic.h>
 
@@ -54,9 +55,22 @@ NO_RETURN VOID
 PsExitThread(ULONG ExitCode)
 {
     KPCR *Kpcr;
+    THREAD *CurrentThread;
+    PROCESS *CurrentProcess;
 
     Kpcr = HalKpcrCurrent();
-    KeSchedEnqueue(&ReaperQueue, Kpcr->CurrentThread);
+    CurrentThread = Kpcr->CurrentThread;
+    CurrentProcess = CurrentThread->Parent;
+
+    /* Cannot kill the root thread */
+    if (CurrentThread->Tid == 1 && CurrentProcess->Pid == 1) {
+        KeBugCheck(
+            BUGCHECK_SYSTEMPROC_KILLED,
+            "crts.sys terminated\n"
+        );
+    }
+
+    KeSchedEnqueue(&ReaperQueue, CurrentThread);
     Kpcr->CurrentThread = NULL;
     HalThreadYield();