pthread_cancel doesn't really work properly. It was only being used in
bees to bring threads to a stop if the BeesContext is destroyed early.
It is frequently implicated in core dump reports because of the fragility
of the C++ iostream / C stdio / library infrastructure, particularly
surrounding upgrades on the host running bees. The pthread_cancel call
itself often simply fails even when it doesn't call terminate().
Defer creation of the status and progress threads until after the
BeesContext::start method is invoked. At that point, the existing
ask-threads-nicely-to-stop code is up and running, and normal condvars
can be used to bring bees to a stop, without having to resort to
pthread_cancel.
Since we're deleting half of the BeesContext constructor in this change,
let's remove the other half too, and put an end to the deprecated support
for multiple BeesContexts sharing a process. It's still possible to run
multiple BeesContexts, but they will not share a FD cache. This will
allow the FD cache's keys to become smaller and hopefully save some
memory later on.
Fixes: #171
Signed-off-by: Zygo Blaxell <bees@furryterror.org>
Move pthread_setname_np to the same place we do pthread_getname_np.
Detect errors in pthread_getname_np--but don't throw an exception
because we would call ourself recursively from the exception handler
when it tries to log the exception.
Fix the order of set_name and the first BEESNOTE/BEESLOG call in threads,
closing small time intervals where logs have the wrong thread name,
and that wrong name becomes persistent for the thread.
Make the main thread's name "bees" because Linux kernel stack traces use
the pthread name of the main thread instead of the name of the process.
Anonymous threads get the process name (usually "bees"). We should not
have any such threads, but we do. This appears to occur mostly during
exception stack unwinding. GCC/pthread bug?
Fixes: https://github.com/Zygo/bees/issues/51
Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit adds log levels to the output. In systemd, it makes colored
lines, otherwise it's probably just a number. Bees is very chatty, so
this paves the road for log level filtering.
Signed-off-by: Kai Krakow <kai@kaishome.de>
