Further progress with LTTng on Beagle Bone Black. Having forced
userspace-rcu to ignore the dmb instruction (CONFIG_RCU_ARM_HAVE_DMB
undefined), lttng-tools installs in the no-kernel, no-user-space case. It also
installs in the just-user-space case, but there is something potentially wrong
with lttng-ust. Testing the lttng-modules cases will have to wait until I get
a new BBB kernel built that has CONFIG_TRACEPOINTS turned on.
The dmb instruction problem still stands.
lttng-userspace emits a long list of warnings during its make:
CC lttng-ust-malloc.lo
In file included from ../include/lttng/ust-tracepoint-event.h:367:0,
from ../include/lttng/tracepoint-event.h:62,
from ust_libc.h:93,
from lttng-ust-malloc.c:29:
././ust_libc.h: In function '__event_prepare_filter_stack__ust_libc___malloc':
././ust_libc.h:35:1: warning: cast from pointer to integer of different size
[-Wpointer-to-int-cast]
...
This recurs on five lines.
Despite this, sample user-space events are captured as expected. Babeltrace
also installs, and the trace looks okay.
Daniel U. Thibault
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