/* * Copyright (C) 2016 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.lang.reflect.*; public class SigQuit implements Runnable { private final static int sigquit; private final static Method kill; private final static int pid; static { int pidTemp = -1; int sigquitTemp = -1; Method killTemp = null; try { Class<?> osClass = Class.forName("android.system.Os"); Method getpid = osClass.getDeclaredMethod("getpid"); pidTemp = (Integer) getpid.invoke(null); Class<?> osConstants = Class.forName("android.system.OsConstants"); Field sigquitField = osConstants.getDeclaredField("SIGQUIT"); sigquitTemp = (Integer) sigquitField.get(null); killTemp = osClass.getDeclaredMethod("kill", int.class, int.class); } catch (Exception e) { if (!e.getClass().getName().equals("ErrnoException")) { e.printStackTrace(System.out); } } pid = pidTemp; sigquit = sigquitTemp; kill = killTemp; } public boolean perform() { try { kill.invoke(null, pid, sigquit); } catch (Exception e) { if (!e.getClass().getName().equals("ErrnoException")) { e.printStackTrace(System.out); } } return true; } public void run() { long endTime = System.currentTimeMillis() + 5000; System.out.println("Performing sigquits for 5 seconds"); while (System.currentTimeMillis() < endTime) { perform(); } } }