void VM_Exit::doit() {

      CompileBroker::set_should_block();

      // Wait for a short period for threads in native to block. Any thread
      // still executing native code after the wait will be stopped at
      // native==>Java/VM barriers.
      // Among 16276 JCK tests, 94% of them come here without any threads still
      // running in native; the other 6% are quiescent within 250ms (Ultra 80).
      wait_for_threads_in_native_to_block();

      set_vm_exited();

      // cleanup globals resources before exiting. exit_globals() currently
      // cleans up outputStream resources and PerfMemory resources.
      exit_globals();

      // Check for exit hook
      exit_hook_t exit_hook = Arguments::exit_hook();
      if (exit_hook != NULL) {
        // exit hook should exit.
        exit_hook(_exit_code);
        // ... but if it didn't, we must do it here
        vm_direct_exit(_exit_code);
      } else {
        vm_direct_exit(_exit_code);
      }