func runtime.writeheapdump_m 2 uses runtime (current package) heapdump.go#L35: writeheapdump_m(fd, &m) heapdump.go#L693: func writeheapdump_m(fd uintptr, m *MemStats) {
The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)