Debugging Multithreaded C++ and C Programs with GDB and Pthreads - GDB Tutorial

Learn to debug multithreaded C and C++ programs using GDB and pthreads in this comprehensive 15-minute tutorial. Master the challenging task of debugging concurrent applications where threads interact in complex, timing-dependent ways that can lead to elusive bugs like deadlocks, data races, and missed signals. Explore how GDB interfaces with pthreads through hands-on demonstrations using a controlled demo program. Discover techniques for identifying and managing individual threads, controlling their scheduling, and examining both shared memory and thread-local state. Practice using pthread_setname_np to name threads for easier identification and debugging workflows. Master essential GDB commands including info threads, thread switching, stepi, continue, and set scheduler-locking to manage execution at a granular level. Understand how to enable and utilize GDB's scheduler-locking mode to prevent unintended thread switching during debugging sessions. Learn to diagnose common concurrency issues such as deadlocks, blocking behavior, and race conditions by inspecting internal program state. Develop skills for analyzing shared memory, mutexes, and thread-local storage in multithreaded environments. Practice handling signals like SIGINT within the context of multithreaded debugging scenarios. Gain experience debugging spinners, race conditions, and other parallel programming challenges. Build confidence in isolating specific threads and controlling their execution to identify root causes of threading issues. Acquire best practices for working with applications involving parallel programming, synchronization primitives, and concurrent data structures. Suitable for software engineers, systems programmers, and computer science students with existing knowledge of C/C++, build tools, and basic GDB usage who want to advance their debugging capabilities for concurrent applications.