This patchset provides the infrastructure for supporting dynamic
probing of libvirtd, using static DTrace markers. This can be
used by SystemTAP on Linux, or DTrace on Solaris/OS-X/BSD for
low overhead tracing.
The proof of concept provides a handful of markers wrt to network
client connections, security & auth. Obviously it can be expanded
to cover a huge area of our codebase for different tasks. The
hard bit is deciding what should be exposed as a probe point.
Ideally probes should not be changed/removed once added, since
this would break any user tracing scripts. So a little care needs
to be taken in placing probes to be robust against future code
re-factoring.
Daniel