[dtrace-discuss] Can dtrace match on parameter type on entry?

[Darren Reed]

As dtrace uses C type information stored in the object
files, which we can use with args[#] and printing, is
it possible to use this for matching?  (via an enhancement.)

So, could it be possible to do:

dtrace -n 'fbt:::entry/mblk_t* == 0x3a0a0a0a0a0/{}'

What this would do is:
* find all of the functions that have an "mblk_t *" in
  their parameter list;
* find out which positions in the parameter list the
  mblk_t* is and
* match against all parameters that are mblk_t*'s with
  0x3a0a0a0a0a0.

Thoughts?
Am I crazy for imagining this?
Or is it already an RFE somewhere?

Darren