// Fast mappings from enumerations to string IDs that are prepopulated
	// in the trace.
	markWorkerLabels [2][len(gcMarkWorkerModeStrings)]traceArg
	goStopReasons    [2][len(traceGoStopReasonStrings)]traceArg
	goBlockReasons   [2][len(traceBlockReasonStrings)]traceArg

	// enabled indicates whether tracing is enabled, but it is only an optimization,

// distinct by name may *not* be distinct by value.
type traceGoStopReason uint8

const (
	traceGoStopGeneric traceGoStopReason = iota
	traceGoStopGoSched
	traceGoStopPreempted
)

var traceGoStopReasonStrings = [...]string{
	traceGoStopGeneric:   "unspecified",
	traceGoStopGoSched:   "runtime.Gosched",
	traceGoStopPreempted: "preempted",
}

// traceEnabled returns true if the trace is currently enabled.
//