go/src/runtime/mcheckmark.go

type checkmarksMap …

var useCheckmark …

// startCheckmarks prepares for the checkmarks phase.
//
// The world must be stopped.
func startCheckmarks() { … }

// endCheckmarks ends the checkmarks phase.
func endCheckmarks() { … }

// setCheckmark throws if marking object is a checkmarks violation,
// and otherwise sets obj's checkmark. It returns true if obj was
// already checkmarked.
func setCheckmark(obj, base, off uintptr, mbits markBits) bool { … }