// gState for it.
	gs, ok := g.gStates[goID]
	if !ok {
		gs = newGState[trace.GoID](goID)
		g.gStates[goID] = gs
	}

	// Try to augment the name of the goroutine.
	gs.augmentName(st.Stack)

	// Handle the goroutine state transition.
	from, to := st.Goroutine()
	if from == to {
		// Filter out no-op events.
		return
	}
	if from.Executing() && !to.Executing() {

		executing:    R(noResource),
		activeRanges: make(map[string]activeRange),
	}
}

// augmentName attempts to use stk to augment the name of the goroutine
// with stack information. This stack must be related to the goroutine
// in some way, but it doesn't really matter which stack.
func (gs *gState[R]) augmentName(stk trace.Stack) {
	if gs.named {
		return
	}
	if stk == trace.NoStack {
		return
	}

	// gState for it.
	gs, ok := g.gStates[goID]
	if !ok {
		gs = newGState[trace.ThreadID](goID)
		g.gStates[goID] = gs
	}
	// If we haven't already named this goroutine, try to name it.
	gs.augmentName(st.Stack)

	// Handle the goroutine state transition.
	from, to := st.Goroutine()
	if from == to {
		// Filter out no-op events.
		return
	}
	if from.Executing() && !to.Executing() {

	// gState for it.
	gs, ok := g.gStates[goID]
	if !ok {
		gs = newGState[trace.ProcID](goID)
		g.gStates[goID] = gs
	}
	// If we haven't already named this goroutine, try to name it.
	gs.augmentName(st.Stack)

	// Handle the goroutine state transition.
	from, to := st.Goroutine()
	if from == to {
		// Filter out no-op events.
		return
	}
	if from == trace.GoRunning && !to.Executing() {