1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 public class Main {
18 
19   private static class Child implements Runnable {
20     @Override
run()21     public void run() {
22       System.out.println("Child started");
23       // Enter native method and stay there, monitoring shutdown behavior.  Since we're a daemon,
24       // the process should shut down anyway, and we should be able to observe changes in the
25       // extended JNI environment.
26       monitorShutdown();
27     }
28   }
29 
main(String[] args)30   public static void main(String[] args) {
31     System.loadLibrary(args[0]);
32     System.out.println("Main Started");
33     Thread t = new Thread(new Child());
34     t.setDaemon(true);
35     t.start();
36     try {
37       Thread.sleep(400);
38     } catch (InterruptedException e) {
39       System.out.println("Unexpected interrupt");
40     }
41     System.out.println("Main Finished");
42   }
43 
monitorShutdown()44   private static native void monitorShutdown();
45 }
46