5 A tracing _domain_ is the official term the LTTng project uses to
6 designate a tracer category.
8 There are currently four known domains:
12 * `java.util.logging` (JUL)
15 Different tracers expose common features in their own interfaces, but,
16 from a user's perspective, you still need to target a specific type of
17 tracer to perform some actions. For example, since both kernel and user
18 space tracers support named tracepoints (probes manually inserted in
19 source code), you need to specify which one is concerned when enabling
20 an event because both domains could have existing events with the same
23 Some features are reserved for some domains. Dynamic function entry/return
24 instrumentation, for example, is currently only supported in the kernel
25 domain, but support for other domains could be added in the future.