var runtime.freemark

5 uses

	runtime (current package)
		heapdump.go#L471: var freemark [_PageSize / 8]bool
		heapdump.go#L484: 		if n > uintptr(len(freemark)) {
		heapdump.go#L490: 				freemark[freeIndex] = true
		heapdump.go#L495: 			if freemark[j] {
		heapdump.go#L496: 				freemark[j] = false