This is xnu-8019. See this file in:
OPTIONS/CONFIG_KASAN                   optional config_kasan
OPTIONS/CONFIG_UBSAN                   optional config_ubsan
OPTIONS/CONFIG_KCOV                    optional config_kcov
OPTIONS/CONFIG_KSANCOV                 optional config_ksancov
OPTIONS/CONFIG_STKSZ                   optional config_stksz

san/memory/kasan.c                     optional config_kasan
san/memory/kasan-fakestack.c           optional config_kasan
san/memory/kasan-test.c                optional config_kasan
san/memory/kasan-memintrinsics.c       optional config_kasan
san/memory/kasan_dynamic_blacklist.c   optional config_kasan
san/memory/kasan-report.c              optional config_kasan
san/memory/kasan-helper.c              optional config_kasan

san/memory/ubsan.c                     optional config_ubsan
san/memory/ubsan_log.c                 optional config_ubsan

san/coverage/kcov_ksancov.c            optional config_ksancov

san/coverage/kcov.c                    optional config_kcov

san/coverage/kcov_stksz.c              optional config_stksz