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
17import dalvik.system.VMRuntime;
18import java.lang.ref.WeakReference;
19import java.lang.reflect.Method;
20
21public class Main {
22    public static void main(String[] args) {
23        try {
24            // Allocate a large object.
25            byte[] arr = new byte[128 * 1024];
26            // Allocate a non movable object.
27            byte[] arr2 = (byte[])VMRuntime.getRuntime().newNonMovableArray(Byte.TYPE, 200);
28            // Put the array in a weak reference so that IsMarked is called by the GC.
29            WeakReference weakRef = new WeakReference(arr2);
30            // Do a GC.
31            Runtime.getRuntime().gc();
32            arr[0] = 1;
33            arr2[0] = 1;
34            System.out.println(arr.length + " " + arr2.length + " " + (weakRef.get() != null));
35        } catch (Exception e) {
36            System.out.println(e);
37        }
38    }
39}
40