// Make sure that gp has had its stack written out to the goroutine
			// profile, exactly as it was when the goroutine profiler first
			// stopped the world.
			systemstack(func() {
				tryRecordGoroutineProfileWB(gp)
			})
		}
		trace := traceAcquire()
		if trace.ok() {
			lostP := oldp != gp.m.p.ptr() || gp.m.syscalltick != gp.m.p.ptr().syscalltick
			systemstack(func() {