ARM introduced atomic synchronization mechanisms, including LDREX/STREX, to ensure thread-safe operations in multi-threaded environments.In scenarios with simultaneous data access, LDREX/STREX prevent inconsistencies by using exclusive monitors.Atomicity is crucial in thread synchronization, helping avoid data races and state inconsistency in multithreaded systems.Exclusive monitors track exclusive memory accesses and ensure atomic updates in conjunction with LDREX/STREX instructions.