var runtime.freemark

5 uses

	runtime (current package)
		heapdump.go#L474: var freemark [_PageSize / 8]bool
		heapdump.go#L487: 		if n > uintptr(len(freemark)) {
		heapdump.go#L493: 				freemark[freeIndex] = true
		heapdump.go#L498: 			if freemark[j] {
		heapdump.go#L499: 				freemark[j] = false