Writing a code coverage tool

How would using an asm library make it easier to write a code coverage tool? Or are you talking about JVM code?

The original poster's article seems to be talking about a method that could be adapted to another language other than Java.

(I wrote this article a while ago).

I'm not sure what you mean. If you're referring to the implementation, it's around three hundred lines [0], including the unfortunate problem I mention with visiting expressions, which doesn't seem like a lot.

Maybe you mean the instrumented code, but that doesn't matter -- it's meant to be generated, executed and thrown away. You would never have to look at it.

[0]: https://github.com/isbadawi/coverage-example