Hi:
I've implemented machine-readable output in the form of JSON, XML and HTML into libdtrace, and by extension dtrace(1) using libxo. The goal is not to replace linking to libdtrace in any way when one wishes to build a custom application around it, but rather to supplement it (as it would now also support this form of output by default) and act as a middle-ground between linking directly to libdtrace and parsing the pretty-printed dtrace(1) output that is available today (but not replace it).
In order to get it to work, you can simply run dtrace(1) as normal, but add -x oformat=json|xml|html|plain.
I've posted the patch up for review if anyone wants to take a look or try it out [1] and posted a hacked up Python program (by no means good Python code) as an example of how this might be used [2]. I would appreciate any feedback you might have.
As this patch is still in its early stages however, there isn't much documentation available for it. I aim to address this soon.
[1]: https://reviews.freebsd.org/D41745 [2]: https://reviews.freebsd.org/D41745 -- Domagoj
