content: /*
   * Copyright (C) 2015 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.Field;
  import java.lang.reflect.Method;
  import java.util.ArrayList;
  import java.util.List;
  
  class MyClassLoader extends ClassLoader {
    MyClassLoader() throws Exception {
      super(MyClassLoader.class.getClassLoader());
  
      // Some magic to get access to the pathList field of BaseDexClassLoader.
      ClassLoader loader = getClass().getClassLoader();
      Class<?> baseDexClassLoader = loader.getClass().getSuperclass();
      Field f = baseDexClassLoader.getDeclaredField("pathList");
      f.setAccessible(true);
      Object pathList = f.get(loader);
  
      // Some magic to get access to the dexField field of pathList.
      // Need to make a copy of the dex elements since we don't want an app image with pre-resolved
      // things.
      f = pathList.getClass().getDeclaredField("dexElements");
      f.setAccessible(true);
      Object[] dexElements = (Object[]) f.get(pathList);
      f = dexElements[0].getClass().getDeclaredField("dexFile");
      f.setAccessible(true);
      for (Object element : dexElements) {
        Object dexFile = f.get(element);
        // Make copy.
        Field fileNameField = dexFile.getClass().getDeclaredField("mFileName");
        fileNameField.setAccessible(true);
        dexFiles.add(dexFile.getClass().getDeclaredConstructor(String.class).newInstance(
          fileNameField.get(dexFile)));
      }
    }
  
    ArrayList<Object> dexFiles = new ArrayList<Object>();
    Field dexFileField;
  
    protected Class<?> loadClass(String className, boolean resolve) throws ClassNotFoundException {
      // Other classes may also get loaded, ignore those.
      if (className.equals("LoadedByMyClassLoader") || className.equals("FirstSeenByMyClassLoader")) {
        System.out.println("Request for " + className);
      }
  
      // We're only going to handle LoadedByMyClassLoader.
      if (className != "LoadedByMyClassLoader") {
        return getParent().loadClass(className);
      }
  
      // Mimic what DexPathList.findClass is doing.
      try {
        for (Object dexFile : dexFiles) {
          Method method = dexFile.getClass().getDeclaredMethod(
              "loadClassBinaryName", String.class, ClassLoader.class, List.class);
  
          if (dexFile != null) {
            Class clazz = (Class)method.invoke(dexFile, className, this, null);
            if (clazz != null) {
              return clazz;
            }
          }
        }
      } catch (Exception e) { /* Ignore */ }
      return null;
    }
  }
  
  class LoadedByMyClassLoader {
    /// CHECK-START: void LoadedByMyClassLoader.bar() inliner (before)
    /// CHECK:      LoadClass
    /// CHECK-NEXT: ClinitCheck
    /// CHECK-NEXT: InvokeStaticOrDirect
    /// CHECK-NEXT: LoadClass
    /// CHECK-NEXT: ClinitCheck
    /// CHECK-NEXT: StaticFieldGet
    /// CHECK-NEXT: LoadString
    /// CHECK-NEXT: NullCheck
    /// CHECK-NEXT: InvokeVirtual
  
    /// CHECK-START: void LoadedByMyClassLoader.bar() inliner (after)
    /// CHECK:      LoadClass
    /// CHECK-NEXT: ClinitCheck
                  /* We inlined FirstSeenByMyClassLoader.$inline$bar */
    /// CHECK-NEXT: LoadClass
    /// CHECK-NEXT: ClinitCheck
    /// CHECK-NEXT: StaticFieldGet
    /// CHECK-NEXT: LoadString
    /// CHECK-NEXT: NullCheck
    /// CHECK-NEXT: InvokeVirtual
  
    /// CHECK-START: void LoadedByMyClassLoader.bar() register (before)
                  /* Load and initialize FirstSeenByMyClassLoader */
    /// CHECK:      LoadClass gen_clinit_check:true
                  /* Load and initialize System */
    /// CHECK-NEXT: LoadClass gen_clinit_check:true
    /// CHECK-NEXT: StaticFieldGet
    // There may be HArmDexCacheArraysBase or HX86ComputeBaseMethodAddress here.
    /// CHECK:      LoadString
    /// CHECK-NEXT: NullCheck
    /// CHECK-NEXT: InvokeVirtual
    public static void bar() {
      FirstSeenByMyClassLoader.$inline$bar();
      System.out.println("In between the two calls.");
      FirstSeenByMyClassLoader.$noinline$bar();
    }
  }
  
  public class Main {
    public static void main(String[] args) throws Exception {
      MyClassLoader o = new MyClassLoader();
      Class foo = o.loadClass("LoadedByMyClassLoader");
      Method m = foo.getDeclaredMethod("bar");
      m.invoke(null);
    }
  }
  