This is xnu-11215.1.10. See this file in:
Directory listing for xnu-11215.1.10//osfmk/kdp
Makefile
core_exclude.h
core_notes.h
kdp.c
kdp.h
kdp_callout.h
kdp_common.c
kdp_common.h
kdp_core.c
kdp_core.h
kdp_dyld.h
kdp_en_debugger.h
kdp_internal.h
kdp_out_stage.h
kdp_private.h
kdp_protocol.h
kdp_serial.c
kdp_serial.h
kdp_udp.c
kdp_udp.h
ml/
output_stages/
processor_core.c
processor_core.h
sk_core.c
sk_core.h
user_core.c