Quelle Test912.java
Sprache: JAVA
/*
* 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.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Base64;
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.intValue);
} 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();
// b/146170757
TestRecursiveClassPrepareEvents();
}
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." );
}
}
/**
* base64 encoded class / dex file for
* class Transform {
* public void sayHi ( ) {
* System . out . println ( " Goodbye " ) ;
* }
* }
*/
private static final byte [] DEX_BYTES = Base64.getDecoder().decode(
"ZGV4CjAzNQCLXSBQ5FiS3f16krSYZFF8xYZtFVp0GRXMAgAAcAAAAHhWNBIAAAAAAAAAACwCAAAO" +
"AAAAcAAAAAYAAACoAAAAAgAAAMAAAAABAAAA2AAAAAQAAADgAAAAAQAAAAABAACsAQAAIAEAAGIB" +
"AABqAQAAcwEAAIABAACXAQAAqwEAAL8BAADTAQAA4wEAAOYBAADqAQAA/gEAAAMCAAAMAgAAAgAA" +
"AAMAAAAEAAAABQAAAAYAAAAIAAAACAAAAAUAAAAAAAAACQAAAAUAAABcAQAABAABAAsAAAAAAAAA" +
"AAAAAAAAAAANAAAAAQABAAwAAAACAAAAAAAAAAAAAAAAAAAAAgAAAAAAAAAHAAAAAAAAAB4CAAAA" +
"AAAAAQABAAEAAAATAgAABAAAAHAQAwAAAA4AAwABAAIAAAAYAgAACQAAAGIAAAAbAQEAAABuIAIA" +
"EAAOAAAAAQAAAAMABjxpbml0PgAHR29vZGJ5ZQALTFRyYW5zZm9ybTsAFUxqYXZhL2lvL1ByaW50" +
"U3RyZWFtOwASTGphdmEvbGFuZy9PYmplY3Q7ABJMamF2YS9sYW5nL1N0cmluZzsAEkxqYXZhL2xh" +
"bmcvU3lzdGVtOwAOVHJhbnNmb3JtLmphdmEAAVYAAlZMABJlbWl0dGVyOiBqYWNrLTMuMzYAA291" +
"dAAHcHJpbnRsbgAFc2F5SGkAEQAHDgATAAcOhQAAAAEBAICABKACAQG4Ag0AAAAAAAAAAQAAAAAA" +
"AAABAAAADgAAAHAAAAACAAAABgAAAKgAAAADAAAAAgAAAMAAAAAEAAAAAQAAANgAAAAFAAAABAAA" +
"AOAAAAAGAAAAAQAAAAABAAABIAAAAgAAACABAAABEAAAAQAAAFwBAAACIAAADgAAAGIBAAADIAAA" +
"AgAAABMCAAAAIAAAAQAAAB4CAAAAEAAAAQAAACwCAAA=" );
private static void testClassVersion() throws Exception {
Class <?> class_loader_class = Class .forName("dalvik.system.InMemoryDexClassLoader" );
Constructor<?> ctor = class_loader_class.getConstructor(ByteBuffer.class , ClassLoader.class );
Class target = ((ClassLoader)ctor.newInstance(
ByteBuffer.wrap(DEX_BYTES), Test912.class .getClassLoader())).loadClass("Transform" );
System.out.println(Arrays.toString(getClassVersion(target)));
}
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" ,
"java.io.FileNotFoundException" , // b/63581208
"java.util.zip.ZipException" , // b/63581208
"sun.invoke.util.Wrapper" , // For "ClassEvents" thread in JIT/no-image config.
};
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 noopThread = new Thread ();
noopThread.start();
noopThread.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 native void runRecursiveClassPrepareEvents(Runnable forceLoad);
private static void TestRecursiveClassPrepareEvents() {
final int [] called = new int [] { 0 };
runRecursiveClassPrepareEvents(() -> {
if (called[0 ] == 2 ) {
return ;
} else {
called[0 ]++;
}
try {
System.out.println("class-prepare event START!" );
// Load a new class in a new class-loader.
Class <?> class_loader_class = Class .forName("dalvik.system.InMemoryDexClassLoader" );
Constructor<?> ctor = class_loader_class.getConstructor(ByteBuffer.class , ClassLoader.class );
Class <?> target = ((ClassLoader)ctor.newInstance(
ByteBuffer.wrap(DEX_BYTES), Test912.class .getClassLoader())).loadClass("Transform" );
target.newInstance();
} catch (Exception e) { }
System.out.println("class-prepare event END!" );
});
if (called[0 ] != 2 ) {
System.out.println("Failed to cause recursive Class prepare." );
}
}
private static class TestForNonInit {
public static double doubleValue = Math.random(); // So it can't be compile-time initialized.
}
@SuppressWarnings("RandomCast" )
private static class TestForInitFail {
public static int intValue = ((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 {
}
}
Messung V0.5 in Prozent C=89 H=92 G=90
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-06-29)
¤
*© Formatika GbR, Deutschland
2026-07-09