lock(&profMemActiveLock)
	lock(&profMemFutureLock[index])
	mProf_FlushLocked(index)
	unlock(&profMemFutureLock[index])
	unlock(&profMemActiveLock)
}

// Called by malloc to record a profiled block.
func mProf_Malloc(mp *m, p unsafe.Pointer, size uintptr) {
	if mp.profStack == nil {
		// mp.profStack is nil if we happen to sample an allocation during the
		// initialization of mp. This case is rare, so we just ignore such

func profilealloc(mp *m, x unsafe.Pointer, size uintptr) {
	c := getMCache(mp)
	if c == nil {
		throw("profilealloc called without a P or outside bootstrapping")
	}
	c.nextSample = nextSample()
	mProf_Malloc(mp, x, size)
}

// nextSample returns the next sampling point for heap profiling. The goal is
// to sample allocations on average every MemProfileRate bytes, but with a