Fix Bug in Process.c to print the exit statement in process_exit instead of exit syscall to handle unexpected/bad exits

src/userprog/process.c

@@ -217,6 +217,8 @@ process_exit (void)
   struct thread *cur = thread_current ();
   uint32_t *pd;
 
+  printf ("%s: exit(%d)\n", cur->name, cur->exit_status);
+
   /* Destroy the current process's page directory and switch back
      to the kernel-only page directory. */
   pd = cur->pagedir;