Reliable user-space stack traces with SFrame

I wonder if it'd be practical to generate the SFrame data from the DWARF data on the fly in userspace, and then present it to the kernel - probably a lot of work the first time a particular executable was processed, but it'd be fairly easy to cache it.

I think it'd be pretty similar to the dlopen() scenario, except that instead of just pointing at existing SFrame data for the object it'd generate the data from another source first.