how to input string and read string result from ManticoreWASM

[dengliangjun]

I am not only a manticore fresher but also a wasm fresher.
my wasm function require a string parameter, in fact string parameter become two parameters, the first is addr and the second is length of string, according to wasm/wat.
my source code and wat code like bellow code demonstrated.
void testString(std::string) -> fun $testString (type 6)(I32 I32)
I use ManticoreWASM to load wasm, invoke testString function with argument_generate function.
is there anyone know how to pass a string parameter or arraybuffer to ManticoreWASM.
thanks indeed.