testgen.Main(gen)
}

func gen(t *testgen.Trace) {
	g := t.Generation(1)

	// One goroutine is exiting with a syscall. It already
	// acquired a new P.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoSyscall)
	b0.Event("ProcStatus", trace.ProcID(1), go122.ProcIdle)
	b0.Event("ProcStart", trace.ProcID(1), testgen.Seq(1))
	b0.Event("GoSyscallEndBlocked")

	// special state indicates this to the parser, so it
	// doesn't try to find a GoSyscallEndBlocked that
	// corresponds with the ProcSteal.
	traceProcSyscallAbandoned
)

// writeGoStatus emits a GoStatus event as well as any active ranges on the goroutine.
func (w traceWriter) writeGoStatus(goid uint64, mid int64, status traceGoStatus, markAssist bool, stackID uint64) traceWriter {

	b0.Event("GoCreateSyscall", trace.GoID(4))
	b0.Event("GoSyscallEndBlocked")
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcIdle)
	b0.Event("ProcStart", trace.ProcID(0), testgen.Seq(1))
	b0.Event("GoStatus", trace.GoID(4), trace.NoThread, go122.GoRunnable)
	b0.Event("GoStart", trace.GoID(4), testgen.Seq(1))
	b0.Event("GoSyscallBegin", testgen.Seq(2), testgen.NoStack)
	b0.Event("GoDestroySyscall")

	// In the latter, we're a goroutine in a syscall.
	goStatus := traceGoRunning
	procStatus := traceProcRunning
	if inSyscall {
		goStatus = traceGoSyscall
		procStatus = traceProcSyscallAbandoned
	}
	w := tl.eventWriter(goStatus, procStatus)

	// Emit the status of the P we're stealing. We may have *just* done this when creating the event

UserRegionEnd dt=4 task=16 name_string=35 stack=28
GoDestroy dt=3
ProcStop dt=28
EventBatch gen=1 m=18446744073709551615 time=2753926855140 size=56
GoStatus dt=74 g=2 m=18446744073709551615 gstatus=4
GoStatus dt=3 g=3 m=18446744073709551615 gstatus=4
GoStatus dt=1 g=4 m=18446744073709551615 gstatus=4
GoStatus dt=1 g=17 m=18446744073709551615 gstatus=4
EventBatch gen=1 m=18446744073709551615 time=2753926855560 size=1759
Stacks
Stack id=45 nframes=3

	// Coroutines. Added in Go 1.23.
	go122.EvGoSwitch:        (*ordering).advanceGoSwitch,
	go122.EvGoSwitchDestroy: (*ordering).advanceGoSwitch,
	go122.EvGoCreateBlocked: (*ordering).advanceGoCreate,

	// GoStatus event with a stack. Added in Go 1.23.
	go122.EvGoStatusStack: (*ordering).advanceGoStatus,

	// Experimental events.

	// Experimental heap span events. Added in Go 1.23.

	case "stack":
		u = b.gen.Stack(arg.([]trace.StackFrame))
	case "seq":
		u = uint64(arg.(Seq))
	case "pstatus":
		u = uint64(arg.(go122.ProcStatus))
	case "gstatus":
		u = uint64(arg.(go122.GoStatus))
	case "g":
		u = uint64(arg.(trace.GoID))
	case "m":
		u = uint64(arg.(trace.ThreadID))
	case "p":
		u = uint64(arg.(trace.ProcID))
	case "string":
		u = b.gen.String(arg.(string))
	case "task":

		mappedArgs = timedEventArgs{ev.Args[0], ^uint64(0), uint64(go122.GoWaiting)}
		delete(it.createdPreInit, GoID(ev.Args[0]))
	case oldtrace.EvGoInSyscall:
		mappedType = go122.EvGoStatus
		// In the new tracer, GoStatus with GoSyscall knows what thread the
		// syscall is on. In the old tracer, EvGoInSyscall doesn't contain that
		// information and all we can do here is specify NoThread.

ProcStop dt=33
ProcStart dt=1506 p=6 p_seq=10
ProcStop dt=26
ProcStart dt=18634 p=7 p_seq=33
ProcStop dt=34
EventBatch gen=1 m=18446744073709551615 time=7689672466616 size=28
GoStatus dt=61 g=2 m=18446744073709551615 gstatus=4
GoStatus dt=3 g=5 m=18446744073709551615 gstatus=4
EventBatch gen=1 m=18446744073709551615 time=7689672467258 size=4540
Stacks
Stack id=86 nframes=7
	pc=4754167 func=24 file=25 line=736

	//		traceRelease(trace)
	//	}
	//
	// More precisely, if we readgstatus for a gp while another goroutine is in the problem
	// window and that goroutine didn't observe that tracing had begun, then we might write
	// a GoStatus(GoWaiting) event for that goroutine, but it won't trace an event marking
	// the transition from GoWaiting to GoRunnable. The trace will then be broken, because
	// future events will be emitted assuming the tracer sees GoRunnable.