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.io.File;
  import java.lang.reflect.Method;
  import java.util.Arrays;
  
  public class Main {
    public static void main(String[] args) throws Exception {
      // Check whether we get the BootClassLoader (not null).
      ClassLoader bootClassLoader = Object.class.getClassLoader();
      if (bootClassLoader == null) {
        throw new IllegalStateException("Expected non-null classloader for Object");
      }
  
      // Try to load libarttest(d) with the BootClassLoader. First construct the filename.
      String libName = System.mapLibraryName(args[0]);
      Method libPathsMethod = Runtime.class.getDeclaredMethod("getLibPaths");
      libPathsMethod.setAccessible(true);
      String[] libPaths = (String[])libPathsMethod.invoke(Runtime.getRuntime());
      String fileName = null;
      for (String p : libPaths) {
        String candidate = p + libName;
        if (new File(candidate).exists()) {
            fileName = candidate;
            break;
        }
      }
      if (fileName == null) {
        throw new IllegalStateException("Didn't find " + libName + " in " +
            Arrays.toString(libPaths));
      }
  
      // Then call an internal function that accepts the classloader. Do not use load(), as it
      // is deprecated and only there for backwards compatibility, and prints a warning to the
      // log that we'd have to strip (it contains the pid).
      Method m = Runtime.class.getDeclaredMethod("doLoad", String.class, ClassLoader.class);
      m.setAccessible(true);
      Object result = m.invoke(Runtime.getRuntime(), fileName, bootClassLoader);
      if (result != null) {
        throw new IllegalStateException(result.toString());
      }
  
      System.out.println("Success.");
    }
  }
  