def from_user_conf(cls, target:Target, consumer:Consumer, user_conf:FtraceConf=None) -> 'ExekallFtraceCollector':
base_conf = cls._get_consumer_conf(consumer)
consumer_cls = get_method_class(consumer)
merged_src = 'user+{}'.format(consumer_cls.__qualname__)
return super().from_user_conf(
target,
base_conf, user_conf,
merged_src=merged_src
)
def _get_consumer_conf(consumer):
attr = 'ftrace_conf'
consumer_cls = get_method_class(consumer)
conf = getattr(consumer_cls, attr, FtraceConf())
# This is not strictly speaking forbidden but in the current situation,
# there is no legitimate use case where it could happen, and it is very
# likely that it comes from a design issue in the class
if not conf['events'] and issubclass(consumer_cls, TestBundle):
raise ValueError(
f"Empty events list in {consumer_cls.__qualname__}.{attr}")
return conf