b0.Event("GoSyscallBegin", testgen.Seq(2), testgen.NoStack)
	b0.Event("GoDestroySyscall")

	// A new Go-created thread with the same ID appears and
	// starts running, then tries to steal the P from the
	// first thread. The stealing is interesting because if
	// the parser handles GoDestroySyscall wrong, then we
	// have a self-steal here potentially that doesn't make
	// sense.

	b0.Event("GoStart", trace.GoID(4), testgen.Seq(1))
	b0.Event("GoSyscallBegin", testgen.Seq(2), testgen.NoStack)
	b0.Event("GoDestroySyscall")
	b0.Event("GoCreateSyscall", trace.GoID(4))
	b0.Event("GoSyscallEnd")
	b0.Event("GoSyscallBegin", testgen.Seq(3), testgen.NoStack)
	b0.Event("GoDestroySyscall")

GoCreateSyscall dt=1 new_g=4
ProcStatus dt=1 p=0 pstatus=2
ProcStart dt=1 p=0 p_seq=1
GoSyscallEndBlocked dt=1
GoStart dt=1 g=4 g_seq=1
GoSyscallBegin dt=1 p_seq=2 stack=0
GoDestroySyscall dt=1
GoCreateSyscall dt=1 new_g=4
GoSyscallEnd dt=1
GoSyscallBegin dt=1 p_seq=3 stack=0
GoDestroySyscall dt=1
EventBatch gen=1 m=18446744073709551615 time=0 size=5
Frequency freq=15625000
EventBatch gen=1 m=18446744073709551615 time=0 size=1
Stacks

GoCreateSyscall dt=1 new_g=4
GoSyscallEndBlocked dt=1
ProcStatus dt=1 p=0 pstatus=2
ProcStart dt=1 p=0 p_seq=1
GoStatus dt=1 g=4 m=18446744073709551615 gstatus=1
GoStart dt=1 g=4 g_seq=1
GoSyscallBegin dt=1 p_seq=2 stack=0
GoDestroySyscall dt=1
EventBatch gen=1 m=0 time=0 size=13
ProcStatus dt=1 p=1 pstatus=2
ProcStart dt=1 p=1 p_seq=1
ProcSteal dt=1 p=0 p_seq=3 m=0
EventBatch gen=1 m=18446744073709551615 time=0 size=5
Frequency freq=15625000

		IsTimedEvent: true,
	},
	EvGoDestroy: event.Spec{
		Name:         "GoDestroy",
		Args:         []string{"dt"},
		IsTimedEvent: true,
	},
	EvGoDestroySyscall: event.Spec{
		Name:         "GoDestroySyscall",
		Args:         []string{"dt"},
		IsTimedEvent: true,
	},
	EvGoStop: event.Spec{
		Name:         "GoStop",
		Args:         []string{"dt", "reason_string", "stack"},
		IsTimedEvent: true,

}

// GoDestroySyscall indicates that a goroutine has transitioned from GoSyscall to dead.
//
// Must not have a P.
//
// This occurs when Go code returns back to C. On pthread platforms it occurs only when
// the C thread is destroyed.
func (tl traceLocker) GoDestroySyscall() {
	// N.B. If we trace a status here, we must never have a P, and we must be on a goroutine

	}

	// Return mp.curg to dead state.
	casgstatus(mp.curg, _Gsyscall, _Gdead)
	mp.curg.preemptStop = false
	sched.ngsys.Add(1)

	if !mp.isExtraInSig {
		if trace.ok() {
			trace.GoDestroySyscall()
			traceRelease(trace)
		}
	}

	// Trash syscalltick so that it doesn't line up with mp.old.syscalltick anymore.
	//