[issue13405] Add DTrace probes

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> Notice too, that the data I am showing is the extra memory I am using
> for the dtrace stack helper, not all python memory (if you check the
> dtrace script, I only contabilize "PyMem_Malloc()" when called from
> "PyCode_New()").
> 
> DTrace allows me to be quirurgic.

I am not disputing the flexibility of dtrace. However, it is also
platform-specific, and needs you to learn a dedicated programming
language and API.

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