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
17import java.lang.reflect.*;
18
19public class SigQuit implements Runnable {
20    private final static int sigquit;
21    private final static Method kill;
22    private final static int pid;
23
24    static {
25        int pidTemp = -1;
26        int sigquitTemp = -1;
27        Method killTemp = null;
28
29        try {
30            Class<?> osClass = Class.forName("android.system.Os");
31            Method getpid = osClass.getDeclaredMethod("getpid");
32            pidTemp = (Integer) getpid.invoke(null);
33
34            Class<?> osConstants = Class.forName("android.system.OsConstants");
35            Field sigquitField = osConstants.getDeclaredField("SIGQUIT");
36            sigquitTemp = (Integer) sigquitField.get(null);
37
38            killTemp = osClass.getDeclaredMethod("kill", int.class, int.class);
39        } catch (Exception e) {
40            if (!e.getClass().getName().equals("ErrnoException")) {
41                e.printStackTrace(System.out);
42            }
43        }
44
45        pid = pidTemp;
46        sigquit = sigquitTemp;
47        kill = killTemp;
48    }
49
50    public boolean perform() {
51        try {
52            kill.invoke(null, pid, sigquit);
53        } catch (Exception e) {
54            if (!e.getClass().getName().equals("ErrnoException")) {
55                e.printStackTrace(System.out);
56            }
57        }
58        return true;
59    }
60
61    public void run() {
62        long endTime = System.currentTimeMillis() + 5000;
63        System.out.println("Performing sigquits for 5 seconds");
64        while (System.currentTimeMillis() < endTime) {
65            perform();
66        }
67    }
68}
69