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rr aspires to be your primary C/C++ debugging tool for Linux, replacing — well, enhancing — gdb. You record a failure once, then debug the recording, deterministically, as many times as you want. The same execution is replayed every time. rr also provides efficient reverse execution under gdb. Set breakpoints and data watchpoints and quickly reverse-execute to where they were hit. rr works on real applications and is used by many developers to fix real bugs. It makes debugging hard bugs much easier, but also speeds up debugging of easy bugs.
Features
- Low overhead compared to other similar tools, especially on mostly-single-threaded workloads
- Documentation available
- Supports recording and replay of all kinds of applications: Firefox, Chrome, QEMU, LibreOffice, Go programs, etc.
- Record, replay and debug multiple-process workloads, including entire containers
- Works with gdb scripting and IDE integration
- Durable, compact traces that can be ported between machines
- Chaos mode to make intermittent bugs more reproducible
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