[issue13405] Add DTrace probes

[Jesús Cea Avión]

Jesús Cea Avión <jcea at jcea.es> added the comment:

Code ready for commit.

Please, review.

After the first commit, I will try to make it compatible with MacOS and FreeBSD. Current target is Solaris and derivatives (OpenIndiana, for instance)

Stan Cox, if you want systemtap compatibility at this moment, please provide a patch. The first patch doesn't need "ustack" compatibility. In fact, MacOS dtrace, for instance, seems not to have "ustack" support at all (according to Google), so the feature is very convenient but optional.

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