//
//go:linkname readMetricNames runtime/metrics_test.runtime_readMetricNames
func readMetricNames() []string {
	metricsLock()
	initMetrics()
	n := len(metrics)
	metricsUnlock()

	list := make([]string, 0, n)

	metricsLock()
	for name := range metrics {
		list = append(list, name)
	}
	metricsUnlock()

	return list
}

func ReadMetricsSlow(memStats *MemStats, samplesp unsafe.Pointer, len, cap int) {
	stw := stopTheWorld(stwForTestReadMetricsSlow)

	// Initialize the metrics beforehand because this could
	// allocate and skew the stats.
	metricsLock()
	initMetrics()

	systemstack(func() {
		// Donate the racectx to g0. readMetricsLocked calls into the race detector
		// via map access.
		getg().racectx = getg().m.curg.racectx