Time Travel Debugging for Linux C/C++ and Java ¦ Undo

Built for Linux C/C++ Developers

Root cause your hardest bugs in hours, not weeks

Low-overhead time travel debugging for millions of lines of code

100% compatible with GDB so no need to learn a new tool – just a handful of new commands. Also available as a Visual Studio Code extension.

Resolve customer issues within hours by quickly getting a reproducer

Save time on diagnosing concurrency bugs caused by multithreading

Troubleshoot frustrating flaky tests producing inconsistent results

Get started in under 2 minutes.
No extra steps required. Debug instantly.

What is Time Travel Debugging?

Record a process. Replay the recording. Resolve the issue.

Reconstruct and examine the full state of the program at any point in time.

Step back in the execution history to inspect the code flow to see what happened.

Record

Record the bug (on-demand or in automated test), capturing the full program execution in a single binary file. No code or build changes are required thanks to Undo’s just-in-time binary instrumentation.

Replay

Any question you have can be answered from a recording. No more “how did that happen?”. Recordings are portable, so they can be replayed outside of the original environment and shared with your team.

Resolve

Examine the full state of the program at any point. Go back and forward in time with ease. Trace from symptom to root cause in one cycle – without having to repeatedly restart your debug session or recompile.

Undo Bug Bounty

Think you can outsmart Undo?

Submit a recording of a bug we can’t solve with Undo and WIN a fully paid conference visit of your choice – up to $3,000!

Step 1: Capture your bug in a recording using Undo. If you don’t have it, use the free trial.
Step 2: Upload your recording below.

Need help to create a recording? No problem. Just book a quick call with one of engineers who can show you how to do it.

Upload recordingBook call with engineer

Competition T&Cs apply

Solve your Hardest Bugs – Fast

Diagnose memory corruptions, race conditions, and other complex intermittent bugs within days, not weeks or months
Quickly rewind to the point of failure in the debugger to understand the root cause
Run, step the program backward or forward, or jump immediately to any point in the execution history to see what happened – without having to restart the process again

No extra set up steps required.
Get started in 2 minutes.

Watch the Demo

Understand Code You Didn’t Write

Unfamiliar with the codebase? No problem! You don’t have to have it all in your head. Even for experienced developers, bugs in multi-million line codebases always involve something unfamiliar.

A recording captures the whole execution history – every line of code in every thread, every variable, every I/O. Rewind and fast-forward time to see how state changes and why the code behaves the way it does.

Get a picture of code flow by exploring how the code is executed dynamically
See exactly what happened and how it happened
Understand subtle interactions amongst complex components, custom data structures, and confusing locking schemes