1 /*
2  * Copyright (C) 2017 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 import java.lang.ref.WeakReference;
18 
19 public class Main {
20   static final class GcWatcher {
finalize()21     protected void finalize() throws Throwable {
22         watcher = new WeakReference<GcWatcher>(new GcWatcher());
23         ++finalizeCounter;
24     }
25   }
26   static WeakReference<GcWatcher> watcher = new WeakReference<GcWatcher>(new GcWatcher());
27   static Object o = new Object();
28   static int finalizeCounter = 0;
29 
main(String[] args)30   public static void main(String[] args) {
31     System.loadLibrary(args[0]);
32     backgroundProcessState();
33     try {
34         Runtime.getRuntime().gc();
35         for (int i = 0; i < 10; ++i) {
36             o = new Object();
37             Thread.sleep(1000);
38         }
39     } catch (Exception e) {}
40     System.out.println("Finalize count too large: " +
41             ((finalizeCounter >= 15) ? Integer.toString(finalizeCounter) : "false"));
42   }
43 
backgroundProcessState()44   private static native void backgroundProcessState();
45 }
46