private void errorHandler()

in bytekit-core/src/main/java/com/alibaba/bytekit/asm/interceptor/InterceptorProcessor.java [192:228]
29 lines of code
8 McCabe index (conditional complexity)

    private void errorHandler(MethodProcessor methodProcessor, InsnList insnList) {
//      MethodInsnNode printStackTrace = new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/Throwable", "printStackTrace", "()V", false);
//      insnList.add(printStackTrace);
        // 第一个参数要求是 throwable ，或者一个exception ？
        // 有很多 binding 并不能使用的，因为location不生效
        BindingContext bindingContext = new BindingContext(null, methodProcessor, null);
        Type methodType = Type.getMethodType(this.exceptionHandlerConfig.getMethodDesc());
        Type[] argumentTypes = methodType.getArgumentTypes();
        List<Binding> bindings = this.exceptionHandlerConfig.getBindings();
        if(bindings.size() + 1 != argumentTypes.length) {
            throw new IllegalArgumentException("errorHandler bindings size do not match error method args size.");
        }
        if(!argumentTypes[0].equals(Type.getType(Throwable.class))) {
            throw new IllegalArgumentException("errorHandler method first arg type must be Throwable.");
        }
        // 组装好要调用的 static 函数的参数
        for(Binding binding: bindings) {
            if(binding.fromStack()) {
                throw new IllegalArgumentException("errorHandler binding can not load value from stack!");
            }
            binding.pushOntoStack(insnList, bindingContext);
            // 检查 回调函数的参数类型，看是否要box一下 ，检查是否原始类型就可以了。
            if(AsmOpUtils.needBox(binding.getType(bindingContext))) {
                AsmOpUtils.box(insnList, binding.getType(bindingContext));
            }
        }

        insnList.add(new MethodInsnNode(Opcodes.INVOKESTATIC, exceptionHandlerConfig.getOwner(), exceptionHandlerConfig.getMethodName(),
                exceptionHandlerConfig.getMethodDesc(), false));

        int size = methodType.getReturnType().getSize();
        if (size == 1) {
            AsmOpUtils.pop(insnList);
        } else if (size == 2) {
            AsmOpUtils.pop2(insnList);
        }
    }