{
   PoclReleaseEvent_1
   Helgrind:Race
   ...
   fun:POclReleaseEvent
   ...
   fun:start_thread
   fun:clone
}
{
   DubiousLock
   Helgrind:Misc
   ...
   fun:__pthread_cond_wait_common
   ...
   fun:pthread_scheduler_get_work
   fun:pocl_pthread_driver_thread
   ...
   fun:start_thread
   fun:clone
}
