@Override
public void generateMethods(Object classVisitor) {
assert classVisitor instanceof ClassVisitor;
ClassVisitor cv = (ClassVisitor) classVisitor;
// generated by compiling the class:
// class foo { public ClassLoader getFrameworkClassLoader() { return
// getClass().getClassLoader(); } }
// and then running ASMifier on it:
// java -classpath asm-debug-all-5.0.2.jar:. org.objectweb.asm.util.ASMifier foo
MethodVisitor mv =
cv.visitMethod(
ACC_PUBLIC, "getFrameworkClassLoader", "()Ljava/lang/ClassLoader;", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(
INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;", false);
mv.visitMethodInsn(
INVOKEVIRTUAL,
"java/lang/Class",
"getClassLoader",
"()Ljava/lang/ClassLoader;",
false);
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
// generated code ends.
}
@Test
public void testInstrumentationModernClassFile() throws Exception {
ClassVisitor classVisitor =
TypeConstantAdjustment.INSTANCE.wrap(
mock(TypeDescription.class),
this.classVisitor,
mock(Implementation.Context.class),
mock(TypePool.class),
new FieldList.Empty<FieldDescription.InDefinedShape>(),
new MethodList.Empty<MethodDescription>(),
IGNORED,
IGNORED);
classVisitor.visit(
ClassFileVersion.JAVA_V5.getMinorMajorVersion(), FOOBAR, FOO, BAR, QUX, new String[] {BAZ});
assertThat(
classVisitor.visitMethod(FOOBAR, FOO, BAR, QUX, new String[] {BAZ}), is(methodVisitor));
verify(this.classVisitor)
.visit(
ClassFileVersion.JAVA_V5.getMinorMajorVersion(),
FOOBAR,
FOO,
BAR,
QUX,
new String[] {BAZ});
verify(this.classVisitor).visitMethod(FOOBAR, FOO, BAR, QUX, new String[] {BAZ});
verifyNoMoreInteractions(this.classVisitor);
verifyZeroInteractions(methodVisitor);
}
T createRootGenerator(AstNode node, String name, Generator.Block block) throws Exception {
ClassVisitor type_builder =
defineClass(Opcodes.ACC_FINAL | Opcodes.ACC_PUBLIC, name, Computation.class);
type_builder.visitSource(node.getFileName(), null);
RootGenerator generator = new RootGenerator(node, this, type_builder, name);
block.invoke(generator);
generator.generateSwitchBlock(true);
return doMagic(name);
}
@Override
public void visitEnd() {
// add fields
for (ThreadLocalVar tlv : threadLocalVars) {
super.visitField(Opcodes.ACC_PUBLIC, tlv.getName(), tlv.getTypeAsDesc(), null, null);
}
super.visitEnd();
}
public String getNewStaticConstant(String type, String name_prefix) {
ClassVisitor cv = getClassVisitor();
String realName;
synchronized (this) {
realName = "__" + constants++;
}
// declare the field
cv.visitField(ACC_PRIVATE | ACC_STATIC | ACC_FINAL, realName, type, null, null).visitEnd();
return realName;
}
private FunctionGenerator createFunctionGenerator(
AstNode node,
String name,
boolean has_original,
String root_prefix,
Set<String> owner_externals)
throws NoSuchMethodException, NoSuchFieldException, SecurityException {
ClassVisitor type_builder = defineClass(Opcodes.ACC_FINAL, name, Computation.class);
type_builder.visitSource(node.getFileName(), null);
return new FunctionGenerator(
node, this, type_builder, has_original, name, root_prefix, owner_externals);
}
public String getNewField(String type, String name, Object init) {
ClassVisitor cv = getClassVisitor();
// declare the field
cv.visitField(ACC_PRIVATE, name, type, null, null).visitEnd();
if (init != null) {
initMethod.aload(THIS);
initMethod.ldc(init);
initMethod.putfield(getClassname(), name, type);
}
return name;
}
T createReplGenerator(AstNode node, String name, ReplGenerator.Block block) throws Exception {
ClassVisitor type_builder =
defineClass(Opcodes.ACC_FINAL | Opcodes.ACC_PUBLIC, name, Computation.class);
type_builder.visitSource(node.getFileName(), null);
ReplGenerator generator = new ReplGenerator(node, this, type_builder, name);
block.invoke(
generator,
generator.getRootFrame(),
generator.getCurrentFrame(),
generator.getUpdateCurrent(),
generator.getEscapeValue(),
generator.getPrintValue());
generator.generateSwitchBlock(true);
return doMagic(name);
}
@Override
public void visitInnerClass(String name, String outerName, String innerName, int access) {
// logger.debug(String.format("[Inner Class] Name: %s, outerName: %s, innerName: %s,
// templateName: %s, newName: %s.",
// name, outerName, innerName, templateName, newName));
if (name.startsWith(set.precompiled.slash)) {
// outerName = outerName.replace(precompiled.slash, generated.slash);
name = name.replace(set.precompiled.slash, set.generated.slash);
int i = name.lastIndexOf('$');
outerName = name.substring(0, i);
super.visitInnerClass(name, outerName, innerName, access);
} else {
super.visitInnerClass(name, outerName, innerName, access);
}
}
@Override
@SuppressWarnings("CallToThreadDumpStack")
public void visitEnd() {
classEntry.setRequiresInstrumentation(false);
db.recordSuspendableMethods(className, classEntry);
if (methods != null && !methods.isEmpty()) {
if (alreadyInstrumented && !forceInstrumentation) {
for (MethodNode mn : methods) mn.accept(makeOutMV(mn));
} else {
if (!alreadyInstrumented) {
super.visitAnnotation(ALREADY_INSTRUMENTED_NAME, true);
classEntry.setInstrumented(true);
}
for (MethodNode mn : methods) {
final MethodVisitor outMV = makeOutMV(mn);
try {
InstrumentMethod im = new InstrumentMethod(db, className, mn);
if (db.isDebug())
db.log(
LogLevel.INFO, "About to instrument method %s#%s%s", className, mn.name, mn.desc);
if (im.collectCodeBlocks()) {
if (mn.name.charAt(0) == '<')
throw new UnableToInstrumentException(
"special method", className, mn.name, mn.desc);
im.accept(outMV, hasAnnotation(mn));
} else mn.accept(outMV);
} catch (AnalyzerException ex) {
ex.printStackTrace();
throw new InternalError(ex.getMessage());
}
}
}
} else {
// if we don't have any suspendable methods, but our superclass is instrumented, we mark this
// class as instrumented, too.
if (!alreadyInstrumented && classEntry.getSuperName() != null) {
ClassEntry superClass = db.getClassEntry(classEntry.getSuperName());
if (superClass != null && superClass.isInstrumented()) {
super.visitAnnotation(ALREADY_INSTRUMENTED_NAME, true);
classEntry.setInstrumented(true);
}
}
}
super.visitEnd();
}
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
this.className = name;
this.classEntry = db.getOrCreateClassEntry(className, superName);
classEntry.setInterfaces(interfaces);
forceInstrumentation |= classEntry.requiresInstrumentation();
// need atleast 1.5 for annotations to work
if (version < Opcodes.V1_5) version = Opcodes.V1_5;
// When Java allows adding interfaces in retransformation, we can mark the class with an
// interface, which makes checking whether it's instrumented faster (with instanceof)
// if(classEntry.requiresInstrumentation() && !contains(interfaces, SUSPENDABLE_NAME)) {
// System.out.println("XX: Marking " + className + " as " + SUSPENDABLE_NAME);
// interfaces = add(interfaces, SUSPENDABLE_NAME);
// }
super.visit(version, access, name, signature, superName, interfaces);
}
@SuppressWarnings("unchecked")
public void visitEnd() {
// add all the fields of the class we're going to merge.
for (Iterator<?> it = classToMerge.fields.iterator(); it.hasNext(); ) {
((FieldNode) it.next()).accept(this);
}
// add all the methods that we to include.
for (Iterator<?> it = classToMerge.methods.iterator(); it.hasNext(); ) {
MethodNode mn = (MethodNode) it.next();
// skip the init.
if (mn.name.equals("<init>")) continue;
String[] exceptions = new String[mn.exceptions.size()];
mn.exceptions.toArray(exceptions);
MethodVisitor mv =
cv.visitMethod(mn.access | Modifier.FINAL, mn.name, mn.desc, mn.signature, exceptions);
mn.instructions.resetLabels();
// mn.accept(new RemappingMethodAdapter(mn.access, mn.desc, mv, new
// SimpleRemapper("org.apache.drill.exec.compile.ExampleTemplate", "Bunky")));
ClassSet top = set;
while (top.parent != null) top = top.parent;
mn.accept(
new RemappingMethodAdapter(
mn.access,
mn.desc,
mv,
new SimpleRemapper(top.precompiled.slash, top.generated.slash)));
}
super.visitEnd();
}
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
if (superName != null) {
this.nameOfSuper = superName.replaceAll("/", ".");
try {
reader = new ClassReader(superName);
ClassVisitor visitor = new MethodGetterVisitor(Opcodes.ASM5, superMethods);
reader.accept(visitor, ClassReader.EXPAND_FRAMES);
} catch (IOException e) {
}
}
if (null != interfaces && interfaces.length == 1) {
this.interfaces = interfaces;
try {
reader = new ClassReader(interfaces[0]);
ClassVisitor visitor = new MethodGetterVisitor(Opcodes.ASM5, interfaceMethods);
reader.accept(visitor, ClassReader.EXPAND_FRAMES);
} catch (IOException e) {
}
}
super.visit(version, access, name, signature, superName, interfaces);
}
@Override
public void visitInnerClass(String name, String outerName,
String innerName, int access) {
// TODO should innerName be changed?
super.visitInnerClass(remapper.mapType(name), outerName == null ? null
: remapper.mapType(outerName), innerName, access);
}
public String getNewConstant(String type, String name_prefix, Object init) {
ClassVisitor cv = getClassVisitor();
String realName = getNewConstantName();
// declare the field
cv.visitField(ACC_PRIVATE, realName, type, null, null).visitEnd();
if (init != null) {
initMethod.aload(THIS);
initMethod.ldc(init);
initMethod.putfield(getClassname(), realName, type);
}
return realName;
}
@Override
public void visit(int version, int access, String name, String signature,
String superName, String[] interfaces) {
this.className = name;
super.visit(version, access, remapper.mapType(name), remapper
.mapSignature(signature, false), remapper.mapType(superName),
interfaces == null ? null : remapper.mapTypes(interfaces));
}
private FieldVisitor declareStaticField(ClassVisitor visitor, String name, Class<?> fieldClass) {
return visitor.visitField(
ACC_PRIVATE | ACC_FINAL | ACC_STATIC | ACC_SYNTHETIC,
name,
Type.getDescriptor(fieldClass),
null,
null);
}
@Override
public void visitEnd() {
for (Map.Entry<Handle, Handle> entry : lambdaAccessToImplMethods.entrySet()) {
Handle accessMethod = entry.getKey();
Handle implMethod = entry.getValue();
Bytecode.generateDelegateMethod(cv, ACC_STATIC | ACC_SYNTHETIC, accessMethod, implMethod);
}
super.visitEnd();
}
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
super.visit(version, access, name, FOO, superName, interfaces);
}
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
className = name;
super.visit(version, access, name, signature, superName, interfaces);
}
public void visitField(FieldNode fieldNode) {
cv.visitField(
fieldNode.getModifiers(),
fieldNode.getName(),
BytecodeHelper.getTypeDescription(fieldNode.getType()),
null, // fieldValue, //br all the sudden that one cannot init the field here. init is done
// in static initializer and instance initializer.
null);
}
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
originClassName = name;
super.visit(version, access, shadowClassName, signature, superName, interfaces);
}
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
super.visit(version, access, name, signature, superName, interfaces);
this.classname = name;
}
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
System.out.println(name + " extends " + superName + " {");
super.visit(version, access, name, signature, superName, interfaces);
}
private MethodVisitor declareMethod(
ClassVisitor visitor,
String methodName,
String methodDescriptor,
String methodSignature,
int access) {
MethodVisitor methodVisitor =
visitor.visitMethod(access, methodName, methodDescriptor, methodSignature, NO_EXCEPTIONS);
methodVisitor.visitCode();
return methodVisitor;
}
// GroovyClassVisitor interface
// -------------------------------------------------------------------------
public void visitClass(ClassNode classNode) {
try {
this.classNode = classNode;
this.internalClassName = BytecodeHelper.getClassInternalName(classNode);
// System.out.println("Generating class: " + classNode.getName());
this.internalBaseClassName = BytecodeHelper.getClassInternalName(classNode.getSuperClass());
cv.visit(
Opcodes.V1_3,
classNode.getModifiers(),
internalClassName,
(String) null,
internalBaseClassName,
BytecodeHelper.getClassInternalNames(classNode.getInterfaces()));
classNode.visitContents(this);
for (Iterator iter = innerClasses.iterator(); iter.hasNext(); ) {
ClassNode innerClass = (ClassNode) iter.next();
ClassNode innerClassType = innerClass;
String innerClassInternalName = BytecodeHelper.getClassInternalName(innerClassType);
String outerClassName = internalClassName; // default for inner classes
MethodNode enclosingMethod = innerClass.getEnclosingMethod();
if (enclosingMethod != null) {
// local inner classes do not specify the outer class name
outerClassName = null;
}
cv.visitInnerClass(
innerClassInternalName,
outerClassName,
innerClassType.getName(),
innerClass.getModifiers());
}
cv.visitEnd();
} catch (GroovyRuntimeException e) {
e.setModule(classNode.getModule());
throw e;
}
}
/** {@inheritDoc} */
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
// Retrieve the class name
className = name;
super.visit(version, access, name, signature, superName, interfaces);
}
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
this.ownClassSpec = name;
this.classFileFormatVersion = version;
super.visit(version, access, name, signature, superName, interfaces);
}
public SkinnyMethodAdapter(
ClassVisitor cv,
int flags,
String name,
String signature,
String something,
String[] exceptions) {
super(flags);
setMethodVisitor(cv.visitMethod(flags, name, signature, something, exceptions));
this.cv = cv;
this.name = name;
}
private void declareClass(
ClassVisitor visitor,
Collection<String> interfaceInternalNames,
Type generatedType,
Type superclassType) {
visitor.visit(
V1_6,
ACC_PUBLIC,
generatedType.getInternalName(),
null,
superclassType.getInternalName(),
Iterables.toArray(interfaceInternalNames, String.class));
}