dtrace discuss - Jul 2005 - Creating new dtrace providers for kernel code

s there a document/web page that describes what is necessary to create a new
dtrace provider for the kernel?

Are there any obligations with respect to interface stability and documentation
for providers in the kernel?

Looking at the guide, I only happened upon documentation for creating user
programs with dtrace hooks in them.

Darren
This message posted from opensolaris.org

> Is there a document/web page that describes what is
> necessary to create a new dtrace provider for the
> kernel?
Yes, it''s described in Chapter 22 of the Dynamic Tracing Guide (the sdt
provider)
http://docs.sun.com/app/docs/doc/817-6223

You just #include <sys/sdt.h>, and add DTRACE_PROBEn(probename, args...);
calls to your source.  Note that *unlike* userland providers, there
isn''t a "provider" argument;  all non-Solaris static probes
in the kernel end up in the "sdt" provider.
> Are there any obligations with respect to interface
> stability and documentation for providers in the
> kernel?
No;  your probes will always be "unstable", and they''re
scopable by your module name, so the namespace issues aren''t large.

Cheers,
- jonathan
This message posted from opensolaris.org