if threading is enabled for the runtime internally, but disabled for
user code, throw PNSE

change the sample to do some work asynchronously using setTimeout
instead of blocking

Binds enable, start, disable methods defaulting to non-streaming FILE mode

overlapped io events

…eFilePath option

two ways of retreiving the collected traces instead of exposing the
emscripten VFS directly.

Probably the Blob one is enough.  Is there any reason to also provide
a data URI?

update the sample to use URL.createObjectURL (session.getTraceBlob())
to create the download link

Expose the emscripten stack allocation API

64 bit integers are awkward to work with in JavaScript.

The EventPipe session ID is derived from a pointer address, so even
though it is nominally a 64-bit value, in practice the top bits are
zero.

Use a 32-bit int to represent the session ID on the javascript side
and convert to 64-bit in C when calling down to the EventPipe APIs

give the sample profiler some non-empty samples to collect

Just use consecutive integers to uniquify the session traces.  Dont'
need a fancy timestamp in the VFS (which would also not be unique if
you create sessions below the timestamp resolution)

Pass up to 7 additional arguments to the callback function

ensures the closure is created once