This is xnu-8019. See this file in:
# Blanket ignore non-sanitized functions
fun:ksancov_*
fun:kcov_*
fun:dtrace_*

# Exclude KSANCOV itself
src:./san/coverage/kcov.c
src:./san/coverage/kcov_ksancov.c
src:./san/coverage/kcov_stksz.c

# Calls from sanitizer hook back to kernel.
fun:_disable_preemption
fun:_enable_preemption
fun:current_thread
fun:ml_at_interrupt_context
fun:get_interrupt_level
fun:get_active_thread
fun:cpu_datap
fun:cpu_number
fun:get_cpu_number
fun:pmap_in_ppl
fun:get_preemption_level