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Adds new tracing API to trace fd, timer, signal and immediate events
on specific trace points: attach, before handler and dettach.
This can be used in combination with the event tag to keep track
of the currently executed event for purpose of debugging.
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Pavel Březina <pbrezina@redhat.com>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Adds a new API to set and get an uint64_t tag on fd, timer, signal and
immediate events. This can be used to assign a unique and known id to
the event to allow easy tracking of such event.
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Pavel Březina <pbrezina@redhat.com>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Samba doesn't use it anymore and we don't want to
invite new users of that api without further discussion.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Sat Jan 12 03:12:09 CET 2019 on sn-devel-144
This allows to specify wrapper tevent_contexts, which adds the ability
to run functions before and after the event handler functions.
This can be used to implement impersonation hooks
or advanced debugging/profiling hooks.
We'll undo the 0.9.36 ABI change on the 0.9.37 release
at the end of this patchset.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
As side effect this avoids tricks with an extra
tevent_common_timed_deny_destructor().
We'll undo the 0.9.36 ABI change on the 0.9.37 release
at the end of this patchset.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This will be a quicker way to time out sending sockets in messaging_dgm. Right
now cleanup of out-sockets is a bit coarse. The ideal would be to kill a socket
after being idle n seconds. This would mean to free and re-install a timer on
every packet. tevent_update_timer will be quite a bit cheaper.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Such events were used before we had immediate events.
It's likely that there're a lot of this events
and we need to add new ones in fifo order.
The tricky part is that tevent_common_add_timer()
should not use the optimization as it's used
by broken Samba versions, which don't use
tevent_common_loop_timer_delay() in source3/lib/events.c.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
As new timestamps typically get higher:-)
it's better to traverse the existing list from
the tail.
This is not completely optimal, but it should be better
than before.
A second optimization could be done for zero timestamps,
we would just remember the last_zero_timer,
but that would change the internal ABI.
Normally thatshould not be a poblem, but the Samba's
source3/lib/events.c abuses tevent_internal.h
from the current source tree, even if an external tevent.h
is used. The other problem is that it makes use of
tevent_common_add_timer() without using
tevent_common_loop_timer_delay().
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
We should debug a message before and after running the handler.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
