const runtime.isSbrkPlatform

4 uses

	runtime (current package)
		malloc.go#L355: 	randomizeHeapBase = goexperiment.RandomizedHeapBase64 && goarch.PtrSize == 8 && !isSbrkPlatform && !raceenabled && !msanenabled && !asanenabled
		malloc.go#L505: 	if isSbrkPlatform {
		mem.go#L190: 	if isSbrkPlatform {
		mem_nonsbrk.go#L11: const isSbrkPlatform = false