@Override
public void visitInsn(int opcode) {
if ((newInvokeReplacer != null) && (opcode == DUP)) {
return; // skip dup after new
}
super.visitInsn(opcode);
}
@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
// [*]
// Fix all Foo.<field> to FooClone.<field>
if (owner.equals(wd.superReference)) {
owner = wd.thisReference;
}
super.visitFieldInsn(opcode, owner, name, desc);
}
@Override
public void visitTypeInsn(int opcode, String type) {
if (opcode == NEW) {
InvokeInfo invokeInfo = new InvokeInfo(type, INIT, StringPool.EMPTY);
for (InvokeAspect aspect : aspects) {
InvokeReplacer ir = aspect.pointcut(invokeInfo);
if (ir != null) {
newInvokeReplacer = ir;
// new pointcut found, skip the new instruction and the following dup.
// and then go to the invokespecial
return;
}
}
}
super.visitTypeInsn(opcode, type);
}
/** Invoked on INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE or INVOKEDYNAMIC. */
@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc) {
// replace NEW.<init>
if ((newInvokeReplacer != null) && (opcode == INVOKESPECIAL)) {
String exOwner = owner;
owner = newInvokeReplacer.getOwner();
name = newInvokeReplacer.getMethodName();
desc = changeReturnType(desc, 'L' + exOwner + ';');
super.visitMethodInsn(INVOKESTATIC, owner, name, desc);
newInvokeReplacer = null;
return;
}
InvokeInfo invokeInfo = new InvokeInfo(owner, name, desc);
// [*]
// creating FooClone.<init>; inside the FOO constructor
// replace the very first invokespecial <init> call (SUB.<init>)
// to targets subclass with target (FOO.<init>).
if (methodInfo.getMethodName().equals(INIT)) {
if ((firstSuperCtorInitCalled == false)
&& (opcode == INVOKESPECIAL)
&& name.equals(INIT)
&& owner.equals(wd.nextSupername)) {
firstSuperCtorInitCalled = true;
owner = wd.superReference;
super.visitMethodInsn(opcode, owner, name, desc);
return;
}
}
// detection of super calls
if ((opcode == INVOKESPECIAL)
&& (owner.equals(wd.nextSupername) && (name.equals(INIT) == false))) {
throw new ProxettaException(
"Super call detected in class "
+ methodInfo.getClassname()
+ " method: "
+ methodInfo.getSignature()
+ "\nProxetta can't handle super calls due to VM limitations.");
}
InvokeReplacer ir = null;
// find first matching aspect
for (InvokeAspect aspect : aspects) {
ir = aspect.pointcut(invokeInfo);
if (ir != null) {
break;
}
}
if (ir == null) {
super.visitMethodInsn(opcode, owner, name, desc);
return;
}
wd.proxyApplied = true;
String exOwner = owner;
owner = ir.getOwner();
name = ir.getMethodName();
switch (opcode) {
case INVOKEINTERFACE:
desc = prependArgument(desc, AsmUtil.L_SIGNATURE_JAVA_LANG_OBJECT);
break;
case INVOKEVIRTUAL:
desc = prependArgument(desc, AsmUtil.L_SIGNATURE_JAVA_LANG_OBJECT);
break;
case INVOKESTATIC:
break;
default:
throw new ProxettaException("Unsupported opcode: " + opcode);
}
// additional arguments
if (ir.isPassOwnerName()) {
desc = appendArgument(desc, AsmUtil.L_SIGNATURE_JAVA_LANG_STRING);
super.visitLdcInsn(exOwner);
}
if (ir.isPassMethodName()) {
desc = appendArgument(desc, AsmUtil.L_SIGNATURE_JAVA_LANG_STRING);
super.visitLdcInsn(methodInfo.getMethodName());
}
if (ir.isPassMethodSignature()) {
desc = appendArgument(desc, AsmUtil.L_SIGNATURE_JAVA_LANG_STRING);
super.visitLdcInsn(methodInfo.getSignature());
}
if (ir.isPassTargetClass()) {
desc = appendArgument(desc, AsmUtil.L_SIGNATURE_JAVA_LANG_CLASS);
super.mv.visitLdcInsn(Type.getType('L' + wd.superReference + ';'));
}
if (ir.isPassThis()) {
desc = appendArgument(desc, AsmUtil.L_SIGNATURE_JAVA_LANG_OBJECT);
super.mv.visitVarInsn(ALOAD, 0);
}
super.visitMethodInsn(INVOKESTATIC, owner, name, desc);
}