UST enable channel not working as expected with respect to already running apps
Events are not traced if we enable a disabled channel after UST application has been started.
How to reproduce:
lttng create; lttng enable-event -u -a; lttng start
lttng disable-channel -u channel0
#console 1 -- before end of 10 seconds
lttng enable-channel -u channel0
#wait until hello completes
Expected result: all hello events are traced.
Actual result: 0 event traced.