var runtime.extram

4 uses

	runtime (current package)
		proc.go#L1998: var extram uintptr
		proc.go#L2013: 		old := atomic.Loaduintptr(&extram)
		proc.go#L2029: 		if atomic.Casuintptr(&extram, old, locked) {
		proc.go#L2039: 	atomic.Storeuintptr(&extram, uintptr(unsafe.Pointer(mp)))