content: /*
   * 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();
          }
      }
  }
  