194     auto &activeTimers = activeThreadTimers[tid];  in popLastActiveTimer()  local
195     assert(!activeTimers.empty() && "expected active timer");  in popLastActiveTimer()
196     return activeTimers.pop_back_val();  in popLastActiveTimer()
212     auto &activeTimers = activeThreadTimers[tid];  in getTimer()  local
214     if (activeTimers.empty()) {  in getTimer()
221       parentTimer = activeTimers.back();  in getTimer()
225     activeTimers.push_back(timer);  in getTimer()
257   auto &activeTimers = activeThreadTimers[tid];  in runAfterPipeline()  local
258   assert(!activeTimers.empty() && "expected active timer");  in runAfterPipeline()
259   activeTimers.pop_back();  in runAfterPipeline()
268   assert(activeTimers.empty() && "expected parent timer to be root");  in runAfterPipeline()