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我在這裏用ASM掙扎着創建一個可以刪除無法訪問的代碼的訪問者。現在,該代碼是一樣的ASM 4.0指南中提供的,那就是:如何使用bytebuddy來檢測不可達代碼?
public class RemoveDeadCodeAdapter extends MethodVisitor {
String owner;
MethodVisitor next;
public RemoveDeadCodeAdapter(String owner, int access, String name,
String desc, MethodVisitor mv) {
super(Opcodes.ASM4, new MethodNode(access, name, desc, null, null));
this.owner = owner;
next = mv;
}
@Override public void visitEnd() {
MethodNode mn = (MethodNode) mv;
Analyzer<BasicValue> a =
new Analyzer<BasicValue>(new BasicInterpreter());
try {
a.analyze(owner, mn);
Frame<BasicValue>[] frames = a.getFrames();
AbstractInsnNode[] insns = mn.instructions.toArray();
for (int i = 0; i < frames.length; ++i) {
if (frames[i] == null && !(insns[i] instanceof LabelNode)) {
mn.instructions.remove(insns[i]);
}
}
} catch (AnalyzerException ignored) {
}
mn.accept(next);
}
}
所以,問題是:有沒有辦法跟Bytebuddy實現這一目標?因爲Bytebuddy似乎很容易工作。如果是的話,有人可以告訴我該過程是什麼?