}

type STWReason int

const (
	STWUnknown                 STWReason = 0
	STWGCMarkTermination       STWReason = 1
	STWGCSweepTermination      STWReason = 2
	STWWriteHeapDump           STWReason = 3
	STWGoroutineProfile        STWReason = 4
	STWGoroutineProfileCleanup STWReason = 5
	STWAllGoroutinesStackTrace STWReason = 6
	STWReadMemStats            STWReason = 7
	STWAllThreadsSyscall       STWReason = 8

		}
	case oldtrace.EvGCStart:
		mappedType = go122.EvGCBegin
	case oldtrace.EvGCDone:
		mappedType = go122.EvGCEnd
	case oldtrace.EvSTWStart:
		sid := it.builtinToStringID[sSTWUnknown+it.trace.STWReason(ev.Args[0])]
		it.lastStwReason = sid
		mappedType = go122.EvSTWBegin
		mappedArgs = timedEventArgs{uint64(sid)}
	case oldtrace.EvSTWDone:
		mappedType = go122.EvSTWEnd

	return gp.atomicstatus.CompareAndSwap(_Gpreempted, _Gwaiting)
}

// stwReason is an enumeration of reasons the world is stopping.
type stwReason uint8

// Reasons to stop-the-world.
//
// Avoid reusing reasons and add new ones instead.
const (
	stwUnknown                     stwReason = iota // "unknown"
	stwGCMarkTerm                                   // "GC mark termination"

	// N.B. Only one GC can be running at a time, so this is naturally
	// serialized by the caller.
	trace.seqGC++
}

// STWStart traces a STWBegin event.
func (tl traceLocker) STWStart(reason stwReason) {
	// Although the current P may be in _Pgcstop here, we model the P as running during the STW. This deviates from the
	// runtime's state tracking, but it's more accurate and doesn't result in any loss of information.