1 /*
2  * Copyright (C) 2016 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 /**
18  * Test that daemon threads that call into a JNI env after the runtime is shutdown do not crash.
19  */
20 public class Main {
21 
22     public final static int THREAD_COUNT = 4;
23 
main(String[] args)24     public static void main(String[] args) throws Exception {
25         System.loadLibrary(args[0]);
26 
27         for (int i = 0; i < THREAD_COUNT; i++) {
28             Thread t = new Thread(new DaemonRunnable());
29             t.setDaemon(true);
30             t.start();
31         }
32         // Give threads time to start and become stuck in waitAndCallIntoJniEnv.
33         Thread.sleep(1000);
34         destroyJavaVMAndExit();
35     }
36 
waitAndCallIntoJniEnv()37     static native void waitAndCallIntoJniEnv();
destroyJavaVMAndExit()38     static native void destroyJavaVMAndExit();
39 
40     private static class DaemonRunnable implements Runnable {
run()41         public void run() {
42             for (;;) {
43                 waitAndCallIntoJniEnv();
44             }
45         }
46     }
47 }
48