The scheme employed in Babeltrace to break this cycle consists in the
"children" holding *reverse component references* to their parents. That
-is, in the context of CTF IR, that event classes hold a reference to
-their parent stream class and stream classes hold a reference to their
-parent trace.
+is, in the context of the trace IR, that event classes hold a reference
+to their parent stream class and stream classes hold a reference to
+their parent trace.
On the other hand, parents hold *claiming aggregation references* to
their children. A claiming aggregation reference means that the object
. Include the `logging.c` and `logging.h` in the `_SOURCES` variable
of your module's object in your module's root `Makefile.am`.
+. Add the log level initializing environment variable name to the
+ `log_level_env_var_names` array in `cli/babeltrace.c`.
+
[[logging-instrument-source]]
==== Instrument a C source file