Is there a technique for finding JsVar memory leaks?

I am examining the nature of the problems I personally introduce into the code base and I find that too many of them relate to failure to jsvUnLock created JsVar instances. Is there a technique that others use to diagnose such leaks? Ideally, I'd like to see a list of JsVars with their times of creation and their times of last access. I'm pretty sure that data isn't available in a JsVar object but maybe in a debug build such a thing might be useful.