This is xnu-8019. See this file in:
Directory listing for xnu-8019//tests/ktrace
kdebug_coproc_tests.c
kdebug_tests.c
kpc_tests.c
kperf_backtracing_tests.c
kperf_helpers.c
kperf_helpers.h
kperf_tests.c
ktrace_helpers.h
ktrace_meta.h