3 commits

Author	SHA1	Message	Date
Ondřej Surý	2484a3702a	Add tracing probes to the isc_job unit ... Add tracing probes to isc_job unit: * libisc:job_cb_before - before the job callback is called * libisc:job_cb_after - after the job callback is called	2023-08-21 18:39:53 +02:00
Ondřej Surý	dcd60215ac	Add tracing probes to the custom isc_rwlock implementation ... Add tracing probes to ISC own isc_rwlock implementation to allow fine-grained tracing. The pthread rwlock already has probes inside glibc, and it's difficult to add probes to headers included from the other libraries.	2023-08-21 18:39:53 +02:00
Ondřej Surý	784d055809	Add support for User Statically Defined Tracing (USDT) probes ... This adds support for User Statically Defined Tracing (USDT). On Linux, this uses the header from SystemTap and dtrace utility, but the support is universal as long as dtrace is available. Also add the required infrastructure to add probes to libisc, libdns and libns libraries, where most of the probes will be.	2023-08-21 18:39:53 +02:00