1/*
2 * Copyright (C) 2011 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 java.lang.reflect.Method;
18import java.util.ArrayList;
19import java.util.List;
20
21public class Main {
22
23    public static void main(String[] args) throws Exception {
24
25        int alloc1 = 1;
26        try {
27            List<byte[]> l = new ArrayList<byte[]>();
28            while (true) {
29                // Allocate a MB at a time
30                l.add(new byte[1048576]);
31                alloc1++;
32            }
33        } catch (OutOfMemoryError e) {
34        }
35        // Expand the heap to the maximum size.
36        // Reflective equivalent of: dalvik.system.VMRuntime.getRuntime().clearGrowthLimit();
37        Class<?> vm_runtime = Class.forName("dalvik.system.VMRuntime");
38        Method get_runtime = vm_runtime.getDeclaredMethod("getRuntime");
39        Object runtime = get_runtime.invoke(null);
40        Method clear_growth_limit = vm_runtime.getDeclaredMethod("clearGrowthLimit");
41        clear_growth_limit.invoke(runtime);
42
43        int alloc2 = 1;
44        try {
45            List<byte[]> l = new ArrayList<byte[]>();
46            while (true) {
47                // Allocate a MB at a time
48                l.add(new byte[1048576]);
49                alloc2++;
50            }
51        } catch (OutOfMemoryError e2) {
52            if (alloc1 > alloc2) {
53                System.out.println("ERROR: Allocated less memory after growth" +
54                    "limit cleared (" + alloc1 + " MBs > " + alloc2 + " MBs");
55                System.exit(1);
56            }
57        }
58        System.out.println("Test complete");
59    }
60}
61