b2251a42aa
KCSAN is a tool to find concurrent memory access that may race each other. After a determined number of memory accesses a cell is created, this describes the current access. It will then delay for a short period to allow other CPUs a chance to race. If another CPU performs a memory access to an overlapping region during this delay the race is reported. This is a straight import of the NetBSD code, it will be adapted to FreeBSD in a future commit. Sponsored by: DARPA, AFRL