Worked on stability improvements for the apache/brpc repository, focusing on resolving a race condition in aarch64 thread-local storage that impacted the bthread_id_unlock function. Addressed this concurrency issue by introducing the volatile keyword for thread-local variables in C++, preventing address caching across suspend points and eliminating sporadic failures observed in production environments. Applied low-level debugging and system programming skills to deliver a precise, minimal-impact fix that enhanced runtime stability and cross-architecture robustness. The work demonstrated careful attention to concurrency control and platform-specific behavior, contributing to improved code quality and reliability in a widely used system programming codebase.