Are LIBC probes part of the ABI?

[Wilco Dijkstra]

Hi,

Various patches have recently removed LIBC probes. I couldn't find a script
or similar that lists these in the binary. Are probes created dynamically and
therefore removing a probe is no different from not executing one?

Some malloc improvements were backported in November. This included
removal of a few probes, so I think the answer is yes, but I'd like to be sure.

Wilco