private static void inheritAnnotations(final CtClass theClass, final CtMethod theMethod)
throws NotFoundException {
if (hasMethod(theClass, theMethod)) {
CtMethod aOtherMethod = theClass.getMethod(theMethod.getName(), theMethod.getSignature());
// method we're probably overriding or implementing in the case of an abstract method.
AnnotationsAttribute annotationsAttribute =
(AnnotationsAttribute)
aOtherMethod.getMethodInfo().getAttribute(AnnotationsAttribute.visibleTag);
if (annotationsAttribute != null) {
ConstPool cp = theClass.getClassFile().getConstPool();
AnnotationsAttribute attr = new AnnotationsAttribute(cp, AnnotationsAttribute.visibleTag);
for (Object obj : annotationsAttribute.getAnnotations()) {
Annotation a = (Annotation) obj;
Annotation theAnnotation = new Annotation(a.getTypeName(), cp);
if (a.getMemberNames() != null) {
for (Object aName : a.getMemberNames()) {
theAnnotation.addMemberValue(aName.toString(), a.getMemberValue(aName.toString()));
}
}
attr.setAnnotation(theAnnotation);
}
theMethod.getMethodInfo().addAttribute(attr);
}
}
}
/**
* Similar to main method but is not static
*
* @param args command line parameters
* @throws Exception if something fails during the execution
*/
public void doIt2(String[] args) throws Exception {
// Se carga la clase para la que se quiere modificar sus bytecodes
ClassPool pool = ClassPool.getDefault();
CtClass cc = pool.get("com.jzb.ja.Clase1");
// Se puede iterar imprimiendo los metodos, y su signatura, contenidos en la clase
for (CtMethod mm : cc.getMethods()) {
System.out.println(mm.getName() + " " + mm.getMethodInfo().getDescriptor());
}
// Se puede buscar un metodo en concreto...
CtMethod mr = cc.getMethod("diHola", "(Ljava/lang/String;)Ljava/lang/String;");
// ... Borrarlo...
cc.removeMethod(mr);
// .. Y volver a escribir su .class moficado en una carpeta raiz
cc.writeFile("c:\\tmp");
// Posteriormente, tanto por este codigo de creación dinamica, o porque se usa
// el fichero .class generado antes, se obtiene un error de "Metodo No Existe"
Class c1 = cc.toClass();
Clase1 o1 = (Clase1) c1.newInstance();
System.out.println(o1.sumaUno(2));
System.out.println(o1.diHola("Pepe"));
}
/* 66: */
/* 67: */ private boolean matchClass(String name, ClassPool pool) /* 68: */ {
/* 69: 84 */ if (this.classname.equals(name)) {
/* 70: 85 */ return true;
/* 71: */ }
/* 72: */ try
/* 73: */ {
/* 74: 88 */ CtClass clazz = pool.get(name);
/* 75: 89 */ CtClass declClazz = pool.get(this.classname);
/* 76: 90 */ if (clazz.subtypeOf(declClazz)) {
/* 77: */ try
/* 78: */ {
/* 79: 92 */ CtMethod m = clazz.getMethod(this.methodname, this.methodDescriptor);
/* 80: 93 */ return m.getDeclaringClass().getName().equals(this.classname);
/* 81: */ }
/* 82: */ catch (NotFoundException e)
/* 83: */ {
/* 84: 97 */ return true;
/* 85: */ }
/* 86: */ }
/* 87: */ }
/* 88: */ catch (NotFoundException e)
/* 89: */ {
/* 90:101 */ return false;
/* 91: */ }
/* 92:104 */ return false;
/* 93: */ }
private static boolean hasMethod(final CtClass theClass, final CtMethod theMethod) {
try {
return theClass.getMethod(theMethod.getName(), theMethod.getSignature()) != null;
} catch (NotFoundException e) {
return false;
}
}
@Test
public void testSetter() throws Exception {
CtClass mock = new WicketMockClassFactory(Date.class).getMock();
assertNotNull(
mock.getMethod(
"setSeconds",
Descriptor.ofMethod(
voidType, new CtClass[] {ClassPool.getDefault().get(Object.class.getName())})));
}
private void initExtraHarvest() {
try {
CtClass terraForming =
HookManager.getInstance()
.getClassPool()
.get("com.wurmonline.server.behaviours.Terraforming");
CtClass[] paramTypes = {
HookManager.getInstance().getClassPool().get("com.wurmonline.server.creatures.Creature"),
CtPrimitiveType.intType,
CtPrimitiveType.intType,
CtPrimitiveType.booleanType,
CtPrimitiveType.intType,
CtPrimitiveType.floatType,
HookManager.getInstance().getClassPool().get("com.wurmonline.server.items.Item")
};
CtMethod method =
terraForming.getMethod(
"harvest", Descriptor.ofMethod(CtPrimitiveType.booleanType, paramTypes));
MethodInfo methodInfo = method.getMethodInfo();
CodeAttribute codeAttribute = methodInfo.getCodeAttribute();
CodeIterator codeIterator = codeAttribute.iterator();
LocalVariableAttribute attr =
(LocalVariableAttribute) codeAttribute.getAttribute(LocalVariableAttribute.tag);
int quantityIndex = -1;
for (int i = 0; i < attr.tableLength(); i++) {
if ("quantity".equals(attr.variableName(i))) {
quantityIndex = attr.index(i);
}
}
if (quantityIndex == -1) {
throw new HookException("Quantity variable can not be resolved");
}
while (codeIterator.hasNext()) {
int pos = codeIterator.next();
int op = codeIterator.byteAt(pos);
if (op == CodeIterator.ISTORE) {
int fieldRefIdx = codeIterator.byteAt(pos + 1);
if (quantityIndex == fieldRefIdx) {
Bytecode bytecode = new Bytecode(codeIterator.get().getConstPool());
bytecode.addIconst(extraHarvest);
bytecode.add(Bytecode.IADD);
codeIterator.insertAt(pos, bytecode.get());
break;
}
}
}
} catch (NotFoundException | BadBytecode e) {
throw new HookException(e);
}
}
@Override
public void compile(HookCompiler compiler, CtClass c, Side side)
throws NotFoundException, CannotCompileException {
compiler.replaceDouble(
c.getMethod("tick", "()V"),
-64,
EntryFactory.getClassEntry(getClass()),
"getOutOfWorldDepth",
"this");
}
@Test(expected = NotFoundException.class)
public void testFinalField() throws Exception {
CtClass mock = new WicketMockClassFactory(FieldContainer.class).getMock();
mock.getMethod("setField", Descriptor.ofMethod(voidType, new CtClass[] {intType}));
}
@Test(expected = Test.None.class)
public void testField() throws Exception {
CtClass mock = new WicketMockClassFactory(FieldContainer.class).getMock();
mock.getMethod("getNonFinalField", Descriptor.ofMethod(OBJECT_CLASS, new CtClass[] {}));
mock.getMethod("setNonFinalField", Descriptor.ofMethod(voidType, new CtClass[] {intType}));
}
private URL computeResourceURL(Method method) throws NotFoundException, URISyntaxException {
List<ResourceFileEntry> filesSimpleNames = new ArrayList<ResourceFileEntry>();
boolean computeExtensions = false;
CtMethod m = ctClass.getMethod(method.getName(), getDescriptor(method));
MethodInfo minfo = m.getMethodInfo2();
AnnotationsAttribute attr =
(AnnotationsAttribute) minfo.getAttribute(AnnotationsAttribute.invisibleTag);
if (attr != null) {
Annotation an = attr.getAnnotation(Source.class.getName());
if (an != null) {
MemberValue[] mvArray = ((ArrayMemberValue) an.getMemberValue("value")).getValue();
if (mvArray != null) {
for (MemberValue mv : mvArray) {
StringMemberValue smv = (StringMemberValue) mv;
filesSimpleNames.add(new ResourceFileEntry(smv.getValue(), m));
}
}
}
}
if (filesSimpleNames.isEmpty()) {
// no @Source annotation detected
filesSimpleNames.add(new ResourceFileEntry(method.getName(), m));
computeExtensions = true;
}
List<URL> existingFiles = new ArrayList<URL>();
for (ResourceFileEntry resourceEntry : filesSimpleNames) {
String resourceName = resourceEntry.resourceName;
CtClass declaringClass = resourceEntry.resourceMethod.getDeclaringClass();
String baseDir = declaringClass.getPackageName().replaceAll("\\.", "/") + "/";
String fileName =
(resourceName.startsWith(baseDir)) ? resourceName : baseDir + resourceName;
if (computeExtensions) {
String[] extensions = getResourceDefaultExtensions(method);
for (String extension : extensions) {
String possibleFile = fileName + extension;
URL url = GwtPatcher.class.getClassLoader().getResource(possibleFile);
if (url != null) {
existingFiles.add(url);
}
}
} else {
URL url = GwtPatcher.class.getClassLoader().getResource(fileName);
if (url != null) {
existingFiles.add(url);
}
}
}
if (existingFiles.isEmpty()) {
throw new RuntimeException(
"No resource file found for method "
+ ctClass.getSimpleName()
+ "."
+ method.getName()
+ "()");
} else if (existingFiles.size() > 1) {
throw new RuntimeException(
"Too many resource files found for method "
+ ctClass.getSimpleName()
+ "."
+ method.getName()
+ "()");
}
return existingFiles.get(0);
}
// @Deprecated
// @Test
public void interceptor()
throws NotFoundException, CannotCompileException, IllegalAccessException,
InstantiationException, IOException, ClassNotFoundException, NoSuchMethodException {
AroundInterceptor aroundInterceptor =
new AroundInterceptor() {
@Override
public void before(Object target, Object[] args) {
logger.info("BEFORE target:" + target + " args:" + Arrays.toString(args));
}
@Override
public void after(Object target, Object[] args, Object result, Throwable throwable) {
logger.info(
"AFTER target: "
+ target
+ " args:"
+ Arrays.toString(args)
+ " result:"
+ result
+ " throwable:"
+ throwable);
}
};
int interceptorId = INTERCEPTOR_REGISTRY_ADAPTOR.addInterceptor(aroundInterceptor);
final ClassPool classPool = new ClassPool(true);
CtClass throwable = classPool.get(Throwable.class.getName());
CtClass ctClass = classPool.get("com.baidu.oped.apm.profiler.interceptor.JavaAssistTestObject");
final CtMethod hello = ctClass.getMethod("hello", "(Ljava/lang/String;)Ljava/lang/String;");
logger.debug("longName:{}", hello.getLongName());
logger.debug("name:{}", hello.getName());
String interceptorClassName = AroundInterceptor.class.getName();
CtClass interceptor = classPool.get(interceptorClassName);
hello.addLocalVariable("interceptor", interceptor);
CtClass object = classPool.get(Object.class.getName());
hello.addLocalVariable("result", object);
// hello.insertBefore("{ System.out.println(\"BEFORE\"); }");
hello.insertBefore(
"{"
+ "interceptor = ("
+ interceptorClassName
+ ") "
+ InterceptorRegistry.class.getName()
+ ".getSimpleInterceptor("
+ interceptorId
+ ");"
+ "interceptor.before(this, $args);"
+ "}");
// hello.addCatch("{" +
//// " interceptor.after(ctx);"+
//// " AroundInterceptor a = (AroundInterceptor) " +
// InterceptorRegistry.class.getName() + ".getStaticInterceptor(\"a\");"+
// " throw $e;" +
// "}", throwable);
// hello.insertAfter("{" +
// "interceptor.after(this, $args, ($w)$_, null); " +
// "}");
// hello.setBody(generatedAroundInterceptor("TestObject", "hello"));
// hello.setBody("{ System.out.println(\"ddd\"); }", ClassMap map );
// hello.insertBefore(" System.out.println(\" BEFORE + \");");
// hello.insertAfter(" System.out.println($_);");
// hello.insertAfter(" System.out.println($r);");
// hello.insertAfter(" System.out.println($w);");
// hello.insertAfter(" System.out.println($sig);");
// hello.insertAfter(" System.out.println($type);");
// hello.insertAfter(" System.out.println($class);");
// hello.instrument(new ExprEditor() {
// public void edit(MethodCall m)
// throws CannotCompileException
// {
// try {
// System.out.println("method call" + m.getMethod().getName());
// } catch (NotFoundException e) {
// e.printStackTrace(); //To change body of catch statement use File | Settings
// | File Templates.
// }
// String code = generatedAroundInterceptor("TestObject", "hello");
// m.replace(code);
// }
// });
// hello.addCatch("System.out.println(\"catch\"); throw $e;", throwable);
// hello.setName("__hello");
// CtMethod method = CtNewMethod.make("public void hello() { try {__hello(); }
// catch(Throwable th){throw th;}}", ctClass);
// CtMethod method = CtNewMethod.make("public void hello() {
// System.out.println(\"ddd\"); } catch(Throwable th){throw th;}}", ctClass);
// ctClass.addMethod(method);
// ctClass.freeze();
// ctClass.writeFile("./debug");
// ctClass.debugWriteFile("./debug");
Loader loader = LoaderUtils.createLoader(classPool);
loader.delegateLoadingOf("com.baidu.oped.apm.bootstrap.");
Class aClass = loader.loadClass(ctClass.getName());
Object testObject = aClass.newInstance();
Method helloMethod = testObject.getClass().getDeclaredMethod("hello", String.class);
try {
helloMethod.invoke(testObject, "hello~~");
} catch (Exception e) {
Assert.fail(e.getMessage());
}
// o.hello();
}
/** Generate Javassist Proxy Classes */
private static <T> void generateProxyClass(
Class<T> primaryInterface, String superClassName, String methodBody) throws Exception {
String newClassName = superClassName.replaceAll("(.+)\\.(\\w+)", "$1.Hikari$2");
CtClass superCt = classPool.getCtClass(superClassName);
CtClass targetCt = classPool.makeClass(newClassName, superCt);
targetCt.setModifiers(Modifier.FINAL);
System.out.println("Generating " + newClassName);
targetCt.setModifiers(Modifier.PUBLIC);
// Make a set of method signatures we inherit implementation for, so we don't generate delegates
// for these
Set<String> superSigs = new HashSet<>();
for (CtMethod method : superCt.getMethods()) {
if ((method.getModifiers() & Modifier.FINAL) == Modifier.FINAL) {
superSigs.add(method.getName() + method.getSignature());
}
}
Set<String> methods = new HashSet<>();
Set<Class<?>> interfaces = getAllInterfaces(primaryInterface);
for (Class<?> intf : interfaces) {
CtClass intfCt = classPool.getCtClass(intf.getName());
targetCt.addInterface(intfCt);
for (CtMethod intfMethod : intfCt.getDeclaredMethods()) {
final String signature = intfMethod.getName() + intfMethod.getSignature();
// don't generate delegates for methods we override
if (superSigs.contains(signature)) {
continue;
}
// Ignore already added methods that come from other interfaces
if (methods.contains(signature)) {
continue;
}
// Ignore default methods (only for Jre8 or later)
if (isDefaultMethod(intf, intfCt, intfMethod)) {
continue;
}
// Track what methods we've added
methods.add(signature);
// Clone the method we want to inject into
CtMethod method = CtNewMethod.copy(intfMethod, targetCt, null);
String modifiedBody = methodBody;
// If the super-Proxy has concrete methods (non-abstract), transform the call into a simple
// super.method() call
CtMethod superMethod = superCt.getMethod(intfMethod.getName(), intfMethod.getSignature());
if ((superMethod.getModifiers() & Modifier.ABSTRACT) != Modifier.ABSTRACT) {
modifiedBody = modifiedBody.replace("((cast) ", "");
modifiedBody = modifiedBody.replace("delegate", "super");
modifiedBody = modifiedBody.replace("super)", "super");
}
modifiedBody = modifiedBody.replace("cast", primaryInterface.getName());
// Generate a method that simply invokes the same method on the delegate
if (isThrowsSqlException(intfMethod)) {
modifiedBody = modifiedBody.replace("method", method.getName());
} else {
modifiedBody =
"{ return ((cast) delegate).method($$); }"
.replace("method", method.getName())
.replace("cast", primaryInterface.getName());
}
if (method.getReturnType() == CtClass.voidType) {
modifiedBody = modifiedBody.replace("return", "");
}
method.setBody(modifiedBody);
targetCt.addMethod(method);
}
}
targetCt.writeFile("target/classes");
}
