rr-debugger

The rr-debugger skill provides deterministic debugging using the rr tool, which offers record-replay debugging capabilities. This skill is primarily useful for debugging crashes, AddressSanitizer (ASAN) faults, and situations where reverse execution is needed. By allowing the capture of a program's execution trace, users can replay the program’s state at any point in time, enabling the analysis of crashes and faults that occur during runtime. With rr-debugger, users can step backward through execution, making it easier to identify the exact cause of issues in a program.

The skill includes powerful reverse execution commands such as reverse-next, reverse-step, and reverse-continue, which help users backtrack in the execution of their program. It also supports extracting crash traces, both for regular crashes and ASAN-related faults. This functionality is enhanced with standard gdb commands for inspecting variables, memory, and source code. Users can automate crash trace extraction through a provided script, making the debugging process more efficient and less error-prone. The rr-debugger is essential for developers looking to debug complex issues that occur in programs, particularly when reverse debugging is crucial for identifying faults that traditional debugging cannot easily uncover.