test/912-classes/src/art/Test912.java - platform/art - Git at Google

 /*
  * 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 {
     art.Main.bindAgentJNIForClass(Test912.class);
     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 {
   }
 }
	/*
	* 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 {
	art.Main.bindAgentJNIForClass(Test912.class);
	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 {
	}
	}