if gp.preemptStop && gp.preempt && gp.stackguard0 == stackPreempt && asyncM == gp.m && asyncM.preemptGen.Load() == asyncGen {
				break
			}

			// Temporarily block state transitions.
			if !castogscanstatus(gp, _Grunning, _Gscanrunning) {
				break
			}

			// Request synchronous preemption.
			gp.preemptStop = true
			gp.preempt = true
			gp.stackguard0 = stackPreempt

// Stack growth is multiplicative, for constant amortized cost.
//
// g->atomicstatus will be Grunning or Gscanrunning upon entry.
// If the scheduler is trying to stop this g, then it will set preemptStop.
//
// This must be nowritebarrierrec because it can be called as part of
// stack growth from other nowritebarrierrec functions, but the
// compiler doesn't check this.
//
//go:nowritebarrierrec

		// This loop can theoretically run for a while, and because
		// it is holding timersLock it cannot be preempted.
		// If someone is trying to preempt us, just return.
		// We can clean the timers later.
		if gp.preemptStop {
			return
		}

		// Delete zombies from tail of heap. It requires no heap adjustments at all,
		// and doing so increases the chances that when we swap out a zombie

	schedlink    guintptr
	waitsince    int64      // approx time when the g become blocked
	waitreason   waitReason // if status==Gwaiting

	preempt       bool // preemption signal, duplicates stackguard0 = stackpreempt
	preemptStop   bool // transition to _Gpreempted on preemption; otherwise, just deschedule
	preemptShrink bool // shrink stack at synchronous safe point

	// asyncSafePoint is set if g is stopped at an asynchronous

	var trace traceLocker
	if !mp.isExtraInSig {
		trace = traceAcquire()
	}

	// 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)
		}
	}