4 _CORE_RWLock_Obtain_for_reading corerwlockobtainread.c:68 4 _Heap_Allocate_aligned_with_boundary heapallocate.c:200 8 _Heap_Extend heap.inl:108 12 _Heap_Walk heapwalk.c:233 4 _POSIX_Threads_Sporadic_budget_callout pthread.c:149 16 _POSIX_signals_Unblock_thread psignalunblockthread.c:108 12 _Timer_server_Body timerserver.c:345 4 killinfo killinfo.c:189 4 killinfo killinfo.c:268