// We can fix this by acquiring the goroutine's scan bit.
		w = w.writeGoStatus(gp.goid, -1, traceGoWaiting, gp.inMarkAssist, 0)
	}
	return w
}

// GoSysCall emits a GoSyscallBegin event.
//
// Must be called with a valid P.
func (tl traceLocker) GoSysCall() {
	// Scribble down the M that the P is currently attached to.
	pp := tl.mp.p.ptr()
	pp.trace.mSyscallID = int64(tl.mp.procid)

		Name:         "GoUnblock",
		Args:         []string{"dt", "g", "g_seq", "stack"},
		IsTimedEvent: true,
		StackIDs:     []int{3},
	},
	EvGoSyscallBegin: event.Spec{
		Name:         "GoSyscallBegin",
		Args:         []string{"dt", "p_seq", "stack"},
		IsTimedEvent: true,
		StackIDs:     []int{2},
	},
	EvGoSyscallEnd: event.Spec{
		Name:         "GoSyscallEnd",
		Args:         []string{"dt"},

ProcStart dt=549 p=0 p_seq=1
GoStart dt=211 g=18 g_seq=1
GoBlock dt=3533 reason_string=12 stack=21
GoStart dt=41 g=21 g_seq=1
GoBlock dt=150 reason_string=10 stack=22
GoStart dt=93 g=20 g_seq=1
GoSyscallBegin dt=51 p_seq=2 stack=23
GoSyscallEnd dt=400
GoBlock dt=582 reason_string=15 stack=25
GoStart dt=26 g=23 g_seq=1
HeapAlloc dt=50 heapalloc_value=1646592
UserRegionBegin dt=2921 task=5 name_string=31 stack=26