var runtime.dumphdr
3 uses
runtime (current package)
heapdump.go#L668: var dumphdr = []byte("go1.7 heap dump\n")
heapdump.go#L680: dwrite(unsafe.Pointer(&dumphdr[0]), uintptr(len(dumphdr)))
The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)