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 import java.lang.reflect.*; 18 19 public 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
