The goal here is to do the whole thing on a fiber rather than how we were
doing it before. This just gets the counter registration going, but we
need to follow up with the parsing/lseek/etc code.
This doesn't start reading from the input stream, but does get things into
place until we actually start processing the recording. When we get a
record vfunc, we will do the input processing.
Also, I no longer wish to try to maintain support for no-polkit. If there
is truly a system where that is something we want to support, we can bring
back the shims as a compile time alternative.
Being able to manage asynchronous operations with libdex will drastically
simplify how we implement the profiler and instruments. We may eventually
do the same with libsysprof-analyze to parallelize some operations.
The goal here is to have a fairly small exposed API surface for profiling
similar to libsysprof-analyze where implementation details are hidden.
SysprofProfiler - Where you setup your recording
SysprofInstrument - What you add to a profiler to extract data
SysprofRecording - Represents an active recording w/ instruments
