use of org.objectweb.asm.commons.Method in project robolectric by robolectric.
the class ClassInstrumentor method generateStaticInitializerNotifierMethod.
private static MethodNode generateStaticInitializerNotifierMethod(MutableClass mutableClass) {
MethodNode methodNode = new MethodNode(Opcodes.ACC_STATIC, "<clinit>", "()V", "()V", null);
RobolectricGeneratorAdapter generator = new RobolectricGeneratorAdapter(methodNode);
generator.push(mutableClass.classType);
generator.invokeStatic(Type.getType(RobolectricInternals.class), new Method("classInitializing", "(Ljava/lang/Class;)V"));
generator.returnValue();
generator.endMethod();
return methodNode;
}
use of org.objectweb.asm.commons.Method in project robolectric by robolectric.
the class ProxyMaker method createProxyFactory.
<T> Factory createProxyFactory(Class<T> targetClass) {
Type targetType = Type.getType(targetClass);
String targetName = targetType.getInternalName();
String proxyName = targetName + "$GeneratedProxy";
Type proxyType = Type.getType("L" + proxyName.replace('.', '/') + ";");
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
writer.visit(V1_7, ACC_PUBLIC | ACC_SYNTHETIC | ACC_SUPER | ACC_FINAL, proxyName, null, targetName, null);
writer.visitField(ACC_PUBLIC | ACC_SYNTHETIC, TARGET_FIELD, targetType.getDescriptor(), null, null);
for (java.lang.reflect.Method method : targetClass.getMethods()) {
if (!shouldProxy(method))
continue;
Method proxyMethod = Method.getMethod(method);
GeneratorAdapter m = new GeneratorAdapter(ACC_PUBLIC | ACC_SYNTHETIC, Method.getMethod(method), null, null, writer);
m.loadThis();
m.getField(proxyType, TARGET_FIELD, targetType);
m.loadArgs();
String targetMethod = methodMapper.getName(targetClass.getName(), method.getName());
// In Java 8 we could use invokespecial here but not in 7, from jvm spec:
// If an invokespecial instruction names a method which is not an instance
// initialization method, then the type of the target reference on the operand
// stack must be assignment compatible with the current class (JLS ยง5.2).
m.visitMethodInsn(INVOKEVIRTUAL, targetName, targetMethod, proxyMethod.getDescriptor(), false);
m.returnValue();
m.endMethod();
}
writer.visitEnd();
byte[] bytecode = writer.toByteArray();
if (DEBUG) {
File file = new File("/tmp", targetClass.getCanonicalName() + "-DirectProxy.class");
System.out.println("Generated Direct Proxy: " + file.getAbsolutePath());
try (OutputStream out = new FileOutputStream(file)) {
out.write(bytecode);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
final Class<?> proxyClass = UNSAFE.defineAnonymousClass(targetClass, bytecode, null);
try {
final Field field = proxyClass.getDeclaredField(TARGET_FIELD);
return new Factory() {
@Override
public <E> E createProxy(Class<E> targetClass, E target) {
try {
Object proxy = UNSAFE.allocateInstance(proxyClass);
field.set(proxy, target);
return targetClass.cast(proxy);
} catch (Throwable t) {
throw new AssertionError(t);
}
}
};
} catch (NoSuchFieldException e) {
throw new AssertionError(e);
}
}
use of org.objectweb.asm.commons.Method in project eclipse.themes.darker by jinmingjian.
the class DarkerWeavingHook method transform.
public void transform(WovenClass wovenClass) {
byte[] bytes = wovenClass.getBytes();
ClassReader cr = new ClassReader(bytes);
ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
cr.accept(cw, 0);
Method md = Method.getMethod("org.eclipse.swt.graphics.Color getForeground ()");
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, md.getName(), md.getDescriptor(), null, null);
final GeneratorAdapter mg = new GeneratorAdapter(ACC_PUBLIC, md, mv);
final Label LABEL_SKIP_CALL_TO_SUPER = new Label();
final Label LABEL_LOOP_CMP = new Label();
final Label LABEL_LOOP_START = new Label();
mg.newInstance(Type.getType(Exception.class));
mg.dup();
mg.invokeConstructor(Type.getType(Exception.class), Method.getMethod("void <init> ()"));
mg.invokeVirtual(Type.getType(Exception.class), Method.getMethod("StackTraceElement[] getStackTrace ()"));
mg.storeLocal(1, Type.getType(StackTraceElement[].class));
mg.push(10);
mg.storeLocal(2, Type.getType(int.class));
mg.goTo(LABEL_LOOP_CMP);
mg.mark(LABEL_LOOP_START);
mg.loadLocal(1);
mg.loadLocal(2);
mg.arrayLoad(Type.getType(StackTraceElement.class));
mg.invokeVirtual(Type.getType(StackTraceElement.class), Method.getMethod("String getClassName ()"));
mg.push("Dialog");
mg.invokeVirtual(Type.getType(String.class), Method.getMethod("int indexOf (String)"));
mg.push(-1);
mg.ifICmp(GeneratorAdapter.EQ, LABEL_SKIP_CALL_TO_SUPER);
// //XXX: DEBUG
// mg.getStatic(Type.getType(System.class), "out", Type.getType(java.io.PrintStream.class));
// mg.push("2");
// mg.invokeVirtual(Type.getType(java.io.PrintStream.class), Method.getMethod("void println (String)"));
// //XXX: DEBUG
mg.loadThis();
mg.invokeConstructor(Type.getType("Lorg/eclipse/swt/widgets/Control;"), Method.getMethod("org.eclipse.swt.graphics.Color getForeground ()"));
mg.returnValue();
mg.mark(LABEL_SKIP_CALL_TO_SUPER);
mg.iinc(2, 1);
mg.mark(LABEL_LOOP_CMP);
mg.loadLocal(2);
mg.loadLocal(1);
mg.arrayLength();
mg.ifICmp(GeneratorAdapter.LT, LABEL_LOOP_START);
mg.loadThis();
mg.invokeVirtual(Type.getType("Lorg/eclipse/swt/custom/CLabel;"), Method.getMethod("org.eclipse.swt.widgets.Display getDisplay ()"));
mg.push(1);
mg.invokeVirtual(Type.getType("Lorg/eclipse/swt/widgets/Display;"), Method.getMethod("org.eclipse.swt.graphics.Color getSystemColor (int)"));
mg.returnValue();
mg.endMethod();
cw.visitEnd();
wovenClass.setBytes(cw.toByteArray());
}
use of org.objectweb.asm.commons.Method in project aries by apache.
the class ProxySubclassAdapter method visit.
/*
* This method visits the class to generate the new subclass.
*
* The following things happen here: 1. The class is renamed to a dynamic
* name 2. The existing class name is changed to be the superclass name so
* that the generated class extends the original class. 3. A private field
* is added to store an invocation handler 4. A constructor is added that
* takes an invocation handler as an argument 5. The constructor method
* instantiates an instance of the superclass 6. The constructor method sets
* the invocation handler so the invoke method can be called from all the
* subsequently rewritten methods 7. Add a getInvocationHandler() method 8.
* store a static Class object of the superclass so we can reflectively find
* methods later
*/
public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
LOGGER.debug(Constants.LOG_ENTRY, "visit", new Object[] { version, access, name, signature, superName, interfaces });
// store the superclass binary name
this.superclassBinaryName = name.replaceAll("/", "\\.");
try {
this.superclassClass = Class.forName(superclassBinaryName, false, loader);
} catch (ClassNotFoundException cnfe) {
throw new TypeNotPresentException(superclassBinaryName, cnfe);
}
// from the superclass anyway
if ((access & ACC_ABSTRACT) != 0) {
// If the super was abstract the subclass should not be!
access &= ~ACC_ABSTRACT;
}
cv.visit(ProxyUtils.getWeavingJavaVersion(), access, newClassName, signature, name, null);
// add a private field for the invocation handler
// this isn't static in case we have multiple instances of the same
// proxy
cv.visitField(ACC_PRIVATE, IH_FIELD, Type.getDescriptor(InvocationHandler.class), null, null);
// create a static adapter for generating a static initialiser method in
// the generated subclass
staticAdapter = new GeneratorAdapter(ACC_STATIC, new Method("<clinit>", Type.VOID_TYPE, NO_ARGS), null, null, cv);
// add a zero args constructor method
Method m = new Method("<init>", Type.VOID_TYPE, NO_ARGS);
GeneratorAdapter methodAdapter = new GeneratorAdapter(ACC_PUBLIC, m, null, null, cv);
// loadthis
methodAdapter.loadThis();
// List the constructors in the superclass.
Constructor<?>[] constructors = superclassClass.getDeclaredConstructors();
// Check that we've got at least one constructor, and get the 1st one in the list.
if (constructors.length > 0) {
// We now need to construct the proxy class as though it is going to invoke the superclasses constructor.
// We do this because we can no longer call the java.lang.Object() zero arg constructor as the JVM now throws a VerifyError.
// So what we do is build up the calling of the superclasses constructor using nulls and default values. This means that the
// class bytes can be verified by the JVM, and then in the ProxySubclassGenerator, we load the class without invoking the
// constructor.
Method constructor = Method.getMethod(constructors[0]);
Type[] argTypes = constructor.getArgumentTypes();
if (argTypes.length == 0) {
methodAdapter.invokeConstructor(Type.getType(superclassClass), new Method("<init>", Type.VOID_TYPE, NO_ARGS));
} else {
for (Type type : argTypes) {
switch(type.getSort()) {
case Type.ARRAY:
// We need to process any array or multidimentional arrays.
String elementDesc = type.getElementType().getDescriptor();
String typeDesc = type.getDescriptor();
// Iterate over the number of arrays and load 0 for each one. Keep a count of the number of
// arrays as we will need to run different code fo multi dimentional arrays.
int index = 0;
while (!elementDesc.equals(typeDesc)) {
typeDesc = typeDesc.substring(1);
methodAdapter.visitInsn(Opcodes.ICONST_0);
index++;
}
// If we're just a single array, then call the newArray method, otherwise use the MultiANewArray instruction.
if (index == 1) {
methodAdapter.newArray(type.getElementType());
} else {
methodAdapter.visitMultiANewArrayInsn(type.getDescriptor(), index);
}
break;
case Type.BOOLEAN:
methodAdapter.push(true);
break;
case Type.BYTE:
methodAdapter.push(Type.VOID_TYPE);
break;
case Type.CHAR:
methodAdapter.push(Type.VOID_TYPE);
break;
case Type.DOUBLE:
methodAdapter.push(0.0);
break;
case Type.FLOAT:
methodAdapter.push(0.0f);
break;
case Type.INT:
methodAdapter.push(0);
break;
case Type.LONG:
methodAdapter.push(0l);
break;
case Type.SHORT:
methodAdapter.push(0);
break;
default:
case Type.OBJECT:
methodAdapter.visitInsn(Opcodes.ACONST_NULL);
break;
}
}
methodAdapter.invokeConstructor(Type.getType(superclassClass), new Method("<init>", Type.VOID_TYPE, argTypes));
}
}
methodAdapter.returnValue();
methodAdapter.endMethod();
// add a method for getting the invocation handler
Method setter = new Method("setInvocationHandler", Type.VOID_TYPE, new Type[] { IH_TYPE });
m = new Method("getInvocationHandler", IH_TYPE, NO_ARGS);
methodAdapter = new GeneratorAdapter(ACC_PUBLIC | ACC_FINAL, m, null, null, cv);
// load this to get the field
methodAdapter.loadThis();
// get the ih field and return
methodAdapter.getField(newClassType, IH_FIELD, IH_TYPE);
methodAdapter.returnValue();
methodAdapter.endMethod();
// add a method for setting the invocation handler
methodAdapter = new GeneratorAdapter(ACC_PUBLIC | ACC_FINAL, setter, null, null, cv);
// load this to put the field
methodAdapter.loadThis();
// load the method arguments (i.e. the invocation handler) to the stack
methodAdapter.loadArgs();
// set the ih field using the method argument
methodAdapter.putField(newClassType, IH_FIELD, IH_TYPE);
methodAdapter.returnValue();
methodAdapter.endMethod();
// loop through the class hierarchy to get any needed methods off the
// supertypes
// start by finding the methods declared on the class of interest (the
// superclass of our dynamic subclass)
java.lang.reflect.Method[] observedMethods = superclassClass.getDeclaredMethods();
// add the methods to a set of observedMethods
ProxySubclassMethodHashSet<String> setOfObservedMethods = new ProxySubclassMethodHashSet<String>(observedMethods.length);
setOfObservedMethods.addMethodArray(observedMethods);
// get the next superclass in the hierarchy
Class<?> nextSuperClass = superclassClass.getSuperclass();
while (nextSuperClass != null) {
// set the fields for the current class
setCurrentAnalysisClassFields(nextSuperClass);
// add a static field and static initializer code to the generated
// subclass
// for each of the superclasses in the hierarchy
addClassStaticField(currentlyAnalysedClassName);
LOGGER.debug("Class currently being analysed: {} {}", currentlyAnalysedClassName, currentlyAnalysedClass);
// now find the methods declared on the current class and add them
// to a set of foundMethods
java.lang.reflect.Method[] foundMethods = currentlyAnalysedClass.getDeclaredMethods();
ProxySubclassMethodHashSet<String> setOfFoundMethods = new ProxySubclassMethodHashSet<String>(foundMethods.length);
setOfFoundMethods.addMethodArray(foundMethods);
// remove from the set of foundMethods any methods we saw on a
// subclass
// because we want to use the lowest level declaration of a method
setOfFoundMethods.removeAll(setOfObservedMethods);
try {
// read the current class and use a
// ProxySubclassHierarchyAdapter
// to process only methods on that class that are in the list
ClassLoader loader = currentlyAnalysedClass.getClassLoader();
if (loader == null) {
loader = this.loader;
}
InputStream is = loader.getResourceAsStream(currentlyAnalysedClass.getName().replaceAll("\\.", "/") + ".class");
if (is == null) {
// use SystemModuleClassLoader as fallback
ClassLoader classLoader = new SystemModuleClassLoader();
is = classLoader.getResourceAsStream(currentlyAnalysedClass.getName().replaceAll("\\.", "/") + ".class");
}
ClassReader cr = new ClassReader(is);
ClassVisitor hierarchyAdapter = new ProxySubclassHierarchyAdapter(this, setOfFoundMethods);
cr.accept(hierarchyAdapter, ClassReader.SKIP_DEBUG);
} catch (IOException e) {
throw new TypeNotPresentException(currentlyAnalysedClassName, e);
}
// now add the foundMethods to the overall list of observed methods
setOfObservedMethods.addAll(setOfFoundMethods);
// get the next class up in the hierarchy and go again
nextSuperClass = currentlyAnalysedClass.getSuperclass();
}
// we've finished looking at the superclass hierarchy
// set the fields for the immediate superclass of our dynamic subclass
setCurrentAnalysisClassFields(superclassClass);
// add the class static field
addClassStaticField(currentlyAnalysedClassName);
// we do the lowest class last because we are already visiting the class
// when in this adapter code
// now we are ready to visit all the methods on the lowest class
// which will happen by the ASM ClassVisitor implemented in this adapter
LOGGER.debug(Constants.LOG_EXIT, "visit");
}
use of org.objectweb.asm.commons.Method in project aries by apache.
the class AbstractWovenProxyMethodAdapter method writeDispatcher.
/**
* Write out the bytecode instructions necessary to do the dispatch.
* We know the dispatcher is non-null, and we need a try/catch around the
* invocation and listener calls.
*/
protected final void writeDispatcher() {
// Setup locals we will use in the dispatch
setupLocals();
// Write the try catch block
visitTryCatchBlock(beginTry, endTry, endTry, THROWABLE_INAME);
mark(beginTry);
// Start dispatching, get the target object and store it
loadThis();
getField(typeBeingWoven, DISPATCHER_FIELD, DISPATCHER_TYPE);
invokeInterface(DISPATCHER_TYPE, new Method("call", OBJECT_TYPE, NO_ARGS));
storeLocal(dispatchTarget);
// Pre-invoke, invoke, post-invoke, return
writePreInvoke();
// Start the real method
push(true);
storeLocal(inNormalMethod);
// Dispatch the method and store the result (null for void)
loadLocal(dispatchTarget);
checkCast(methodDeclaringType);
loadArgs();
if (isMethodDeclaringTypeInterface) {
invokeInterface(methodDeclaringType, currentTransformMethod);
} else {
invokeVirtual(methodDeclaringType, currentTransformMethod);
}
if (isVoid) {
visitInsn(ACONST_NULL);
}
storeLocal(normalResult);
// finish the real method and post-invoke
push(false);
storeLocal(inNormalMethod);
writePostInvoke();
// Return, with the return value if necessary
if (!!!isVoid) {
loadLocal(normalResult);
}
returnValue();
// End of our try, start of our catch
mark(endTry);
writeMethodCatchHandler();
}
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