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.
   */
  
  package art;
  
  import java.lang.ref.Reference;
  import java.lang.reflect.Constructor;
  import java.lang.reflect.Proxy;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Comparator;
  
  public class Test912 {
    public static void run() throws Exception {
      doTest();
    }
  
    public static void doTest() throws Exception {
      testClass("java.lang.Object");
      testClass("java.lang.String");
      testClass("java.lang.Math");
      testClass("java.util.List");
  
      testClass(getProxyClass());
  
      testClass(int.class);
      testClass(double[].class);
  
      testClassType(int.class);
      testClassType(getProxyClass());
      testClassType(Runnable.class);
      testClassType(String.class);
      testClassType(ArrayList.class);
  
      testClassType(int[].class);
      testClassType(Runnable[].class);
      testClassType(String[].class);
  
      testClassFields(Integer.class);
      testClassFields(int.class);
      testClassFields(String[].class);
  
      testClassMethods(Integer.class);
      testClassMethods(int.class);
      testClassMethods(String[].class);
  
      testClassStatus(int.class);
      testClassStatus(String[].class);
      testClassStatus(Object.class);
      testClassStatus(TestForNonInit.class);
      try {
        System.out.println(TestForInitFail.dummy);
      } catch (ExceptionInInitializerError e) {
      }
      testClassStatus(TestForInitFail.class);
  
      testInterfaces(int.class);
      testInterfaces(String[].class);
      testInterfaces(Object.class);
      testInterfaces(InfA.class);
      testInterfaces(InfB.class);
      testInterfaces(InfC.class);
      testInterfaces(ClassA.class);
      testInterfaces(ClassB.class);
      testInterfaces(ClassC.class);
  
      testClassLoader(String.class);
      testClassLoader(String[].class);
      testClassLoader(InfA.class);
      testClassLoader(getProxyClass());
  
      testClassLoaderClasses();
  
      System.out.println();
  
      testClassVersion();
  
      System.out.println();
  
      // Use a dedicated thread to have a well-defined current thread.
      Thread classEventsThread = new Thread("ClassEvents") {
        @Override
        public void run() {
          try {
            testClassEvents();
          } catch (Exception e) {
            throw new RuntimeException(e);
          }
        }
      };
      classEventsThread.start();
      classEventsThread.join();
    }
  
    private static void testClass(String className) throws Exception {
      Class<?> base = Class.forName(className);
      testClass(base);
    }
  
    private static void testClass(Class<?> base) throws Exception {
      String[] result = getClassSignature(base);
      System.out.println(Arrays.toString(result));
      int mod = getClassModifiers(base);
      if (mod != base.getModifiers()) {
        throw new RuntimeException("Unexpected modifiers: " + base.getModifiers() + " vs " + mod);
      }
      System.out.println(Integer.toHexString(mod));
    }
  
    private static void testClassType(Class<?> c) throws Exception {
      boolean isInterface = isInterface(c);
      boolean isArray = isArrayClass(c);
      boolean isModifiable = isModifiableClass(c);
      System.out.println(c.getName() + " interface=" + isInterface + " array=" + isArray +
          " modifiable=" + isModifiable);
    }
  
    private static void testClassFields(Class<?> c) throws Exception {
      System.out.println(Arrays.toString(getClassFields(c)));
    }
  
    private static void testClassMethods(Class<?> c) throws Exception {
      System.out.println(Arrays.toString(getClassMethods(c)));
    }
  
    private static void testClassStatus(Class<?> c) {
      System.out.println(c + " " + Integer.toBinaryString(getClassStatus(c)));
    }
  
    private static void testInterfaces(Class<?> c) {
      System.out.println(c + " " + Arrays.toString(getImplementedInterfaces(c)));
    }
  
    private static boolean IsBootClassLoader(ClassLoader l) {
      // Hacky check for Android's fake boot classloader.
      return l.getClass().getName().equals("java.lang.BootClassLoader");
    }
  
    private static void testClassLoader(Class<?> c) {
      Object cl = getClassLoader(c);
      System.out.println(c + " " + (cl != null ? cl.getClass().getName() : "null"));
      if (cl == null) {
        if (c.getClassLoader() != null && !IsBootClassLoader(c.getClassLoader())) {
          throw new RuntimeException("Expected " + c.getClassLoader() + ", but got null.");
        }
      } else {
        if (!(cl instanceof ClassLoader)) {
          throw new RuntimeException("Unexpected \"classloader\": " + cl + " (" + cl.getClass() +
              ")");
        }
        if (cl != c.getClassLoader()) {
          throw new RuntimeException("Unexpected classloader: " + c.getClassLoader() + " vs " + cl);
        }
      }
    }
  
    private static void testClassLoaderClasses() throws Exception {
      System.out.println();
      System.out.println("boot <- (B) <- (A,C)");
      ClassLoader cl1 = DexData.create2(DexData.create1());
      Class.forName("B", false, cl1);
      Class.forName("A", false, cl1);
      printClassLoaderClasses(cl1);
  
      System.out.println();
      System.out.println("boot <- (B) <- (A, List)");
      ClassLoader cl2 = DexData.create2(DexData.create1());
      Class.forName("A", false, cl2);
      Class.forName("java.util.List", false, cl2);
      Class.forName("B", false, cl2.getParent());
      printClassLoaderClasses(cl2);
  
      System.out.println();
      System.out.println("boot <- 1+2 (A,B)");
      ClassLoader cl3 = DexData.create12();
      Class.forName("B", false, cl3);
      Class.forName("A", false, cl3);
      printClassLoaderClasses(cl3);
  
      // Check that the boot classloader dumps something non-empty.
      ClassLoader boot = ClassLoader.getSystemClassLoader().getParent();
      while (boot.getParent() != null) {
        boot = boot.getParent();
      }
  
      Class<?>[] bootClasses = getClassLoaderClasses(boot);
      if (bootClasses.length == 0) {
        throw new RuntimeException("No classes initiated by boot classloader.");
      }
      // Check that at least java.util.List is loaded.
      boolean foundList = false;
      for (Class<?> c : bootClasses) {
        if (c == java.util.List.class) {
          foundList = true;
          break;
        }
      }
      if (!foundList) {
        System.out.println(Arrays.toString(bootClasses));
        throw new RuntimeException("Could not find class java.util.List.");
      }
    }
  
    private static void testClassVersion() {
      System.out.println(Arrays.toString(getClassVersion(Main.class)));
    }
  
    private static void testClassEvents() throws Exception {
      ClassLoader cl = Main.class.getClassLoader();
      while (cl.getParent() != null) {
        cl = cl.getParent();
      }
      final ClassLoader boot = cl;
  
      // The JIT may deeply inline and load some classes. Preload these for test determinism.
      final String PRELOAD_FOR_JIT[] = {
          "java.nio.charset.CoderMalfunctionError",
          "java.util.NoSuchElementException"
      };
      for (String s : PRELOAD_FOR_JIT) {
        Class.forName(s);
      }
  
      Runnable r = new Runnable() {
        @Override
        public void run() {
          try {
            ClassLoader cl6 = DexData.create12();
            System.out.println("C, true");
            Class.forName("C", true, cl6);
            printClassLoadMessages();
          } catch (Exception e) {
            throw new RuntimeException(e);
          }
        }
      };
  
      Thread dummyThread = new Thread();
      dummyThread.start();
      dummyThread.join();
  
      enableClassLoadPreparePrintEvents(true, Thread.currentThread());
  
      ClassLoader cl1 = DexData.create12();
      System.out.println("B, false");
      Class.forName("B", false, cl1);
      printClassLoadMessages();
  
      ClassLoader cl2 = DexData.create12();
      System.out.println("B, true");
      Class.forName("B", true, cl2);
      printClassLoadMessages();
  
      ClassLoader cl3 = DexData.create12();
      System.out.println("C, false");
      Class.forName("C", false, cl3);
      printClassLoadMessages();
      System.out.println("A, false");
      Class.forName("A", false, cl3);
      printClassLoadMessages();
  
      ClassLoader cl4 = DexData.create12();
      System.out.println("C, true");
      Class.forName("C", true, cl4);
      printClassLoadMessages();
      System.out.println("A, true");
      Class.forName("A", true, cl4);
      printClassLoadMessages();
  
      ClassLoader cl5 = DexData.create12();
      System.out.println("A, true");
      Class.forName("A", true, cl5);
      printClassLoadMessages();
      System.out.println("C, true");
      Class.forName("C", true, cl5);
      printClassLoadMessages();
  
      enableClassLoadPreparePrintEvents(false, null);
  
      Thread t = new Thread(r, "TestRunner");
      enableClassLoadPreparePrintEvents(true, t);
      t.start();
      t.join();
      enableClassLoadPreparePrintEvents(false, null);
  
      enableClassLoadPreparePrintEvents(true, Thread.currentThread());
  
      // Check creation of arrays and proxies.
      Proxy.getProxyClass(Main.class.getClassLoader(), new Class[] { Comparable.class, I0.class });
      Class.forName("[Lart.Test912;");
      printClassLoadMessages();
  
      enableClassLoadPreparePrintEvents(false, null);
  
      testClassLoadPrepareEquality();
    }
  
    private static void testClassLoadPrepareEquality() throws Exception {
      setEqualityEventStorageClass(ClassF.class);
  
      enableClassLoadPrepareEqualityEvents(true);
  
      Class.forName("art.Test912$ClassE");
  
      enableClassLoadPrepareEqualityEvents(false);
    }
  
    private static void printClassLoaderClasses(ClassLoader cl) {
      for (;;) {
        if (cl == null || !cl.getClass().getName().startsWith("dalvik.system")) {
          break;
        }
  
        Class<?> classes[] = getClassLoaderClasses(cl);
        Arrays.sort(classes, new ClassNameComparator());
        System.out.println(Arrays.toString(classes));
  
        cl = cl.getParent();
      }
    }
  
    private static void printClassLoadMessages() {
      for (String s : getClassLoadMessages()) {
        System.out.println(s);
      }
    }
  
    private static native boolean isModifiableClass(Class<?> c);
    private static native String[] getClassSignature(Class<?> c);
  
    private static native boolean isInterface(Class<?> c);
    private static native boolean isArrayClass(Class<?> c);
  
    private static native int getClassModifiers(Class<?> c);
  
    private static native Object[] getClassFields(Class<?> c);
    private static native Object[] getClassMethods(Class<?> c);
    private static native Class<?>[] getImplementedInterfaces(Class<?> c);
  
    private static native int getClassStatus(Class<?> c);
  
    private static native Object getClassLoader(Class<?> c);
  
    private static native Class<?>[] getClassLoaderClasses(ClassLoader cl);
  
    private static native int[] getClassVersion(Class<?> c);
  
    private static native void enableClassLoadPreparePrintEvents(boolean b, Thread filter);
    private static native String[] getClassLoadMessages();
  
    private static native void setEqualityEventStorageClass(Class<?> c);
    private static native void enableClassLoadPrepareEqualityEvents(boolean b);
  
    private static class TestForNonInit {
      public static double dummy = Math.random();  // So it can't be compile-time initialized.
    }
  
    private static class TestForInitFail {
      public static int dummy = ((int)Math.random())/0;  // So it throws when initializing.
    }
  
    public static interface InfA {
    }
    public static interface InfB extends InfA {
    }
    public static interface InfC extends InfB {
    }
  
    public abstract static class ClassA implements InfA {
    }
    public abstract static class ClassB extends ClassA implements InfB {
    }
    public abstract static class ClassC implements InfA, InfC {
    }
  
    public static class ClassE {
      public void foo() {
      }
      public void bar() {
      }
    }
  
    public static class ClassF {
      public static Object STATIC = null;
      public static Reference<Object> WEAK = null;
    }
  
    private static class ClassNameComparator implements Comparator<Class<?>> {
      public int compare(Class<?> c1, Class<?> c2) {
        return c1.getName().compareTo(c2.getName());
      }
    }
  
    // See run-test 910 for an explanation.
  
    private static Class<?> proxyClass = null;
  
    private static Class<?> getProxyClass() throws Exception {
      if (proxyClass != null) {
        return proxyClass;
      }
  
      for (int i = 1; i <= 21; i++) {
        proxyClass = createProxyClass(i);
        String name = proxyClass.getName();
        if (name.equals("$Proxy20")) {
          return proxyClass;
        }
      }
      return proxyClass;
    }
  
    private static Class<?> createProxyClass(int i) throws Exception {
      int count = Integer.bitCount(i);
      Class<?>[] input = new Class<?>[count + 1];
      input[0] = Runnable.class;
      int inputIndex = 1;
      int bitIndex = 0;
      while (i != 0) {
          if ((i & 1) != 0) {
              input[inputIndex++] = Class.forName("art.Test912$I" + bitIndex);
          }
          i >>>= 1;
          bitIndex++;
      }
      return Proxy.getProxyClass(Test912.class.getClassLoader(), input);
    }
  
    // Need this for the proxy naming.
    public static interface I0 {
    }
    public static interface I1 {
    }
    public static interface I2 {
    }
    public static interface I3 {
    }
    public static interface I4 {
    }
  }
  