diff options
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/kern_event.c | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c index c3b37f5..8692808 100644 --- a/sys/kern/kern_event.c +++ b/sys/kern/kern_event.c @@ -28,6 +28,8 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include "opt_ktrace.h" + #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> @@ -57,6 +59,9 @@ __FBSDID("$FreeBSD$"); #include <sys/syscallsubr.h> #include <sys/taskqueue.h> #include <sys/uio.h> +#ifdef KTRACE +#include <sys/ktrace.h> +#endif #include <vm/uma.h> @@ -560,6 +565,12 @@ kevent(struct thread *td, struct kevent_args *uap) kevent_copyout, kevent_copyin}; int error; +#ifdef KTRACE + struct uio ktruio; + struct iovec ktriov; + struct uio *ktruioin = NULL; + struct uio *ktruioout = NULL; +#endif if (uap->timeout != NULL) { error = copyin(uap->timeout, &ts, sizeof(ts)); @@ -569,8 +580,33 @@ kevent(struct thread *td, struct kevent_args *uap) } else tsp = NULL; - return (kern_kevent(td, uap->fd, uap->nchanges, uap->nevents, - &k_ops, tsp)); +#ifdef KTRACE + if (KTRPOINT(td, KTR_GENIO)) { + ktriov.iov_base = uap->changelist; + ktriov.iov_len = uap->nchanges * sizeof(struct kevent); + ktruio = (struct uio){ .uio_iov = &ktriov, .uio_iovcnt = 1, + .uio_segflg = UIO_USERSPACE, .uio_rw = UIO_READ, + .uio_td = td }; + ktruioin = cloneuio(&ktruio); + ktriov.iov_base = uap->eventlist; + ktriov.iov_len = uap->nevents * sizeof(struct kevent); + ktruioout = cloneuio(&ktruio); + } +#endif + + error = kern_kevent(td, uap->fd, uap->nchanges, uap->nevents, + &k_ops, tsp); + +#ifdef KTRACE + if (ktruioin != NULL) { + ktruioin->uio_resid = uap->nchanges * sizeof(struct kevent); + ktrgenio(uap->fd, UIO_WRITE, ktruioin, 0); + ktruioout->uio_resid = td->td_retval[0] * sizeof(struct kevent); + ktrgenio(uap->fd, UIO_READ, ktruioout, error); + } +#endif + + return (error); } /* |
