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Unix Dweeb

Undo releases Live Recorder 5.0 for Linux debugging

Jun 28, 20192 mins
LinuxTechnology Industry

Debugging on multi-process systems just got significantly easier with the release of Live Recorder 5.0 from Undo.

Linux debugging has taken a giant step forward with the release of Live Recorder 5.0 from Undo.

Just released on Wednesday, this product makes debugging on multi-process systems significantly easier. Based on flight recorder technology, it delves more deeply into processes to provide insight into what’s going on within each process. This includes memory, threads, program flow, service calls and more. To make this possible, Live Recorder 5.0’s record, replay and debugging capabilities have been enhanced with the ability to:

  • Record the exact order in which processes altered shared memory variables. It is even possible to zero in on specific variables and skip backward to the last line of code in any process that altered the variable.
  • Expose potential defects by randomizing thread execution to help reveal race conditions, crashes and other multi-threading defects.
  • Record and replay the execution of individual Kubernetes and Docker containers to help resolve defects faster in microservices environments.

The Undo Live Recorder enables engineering teams to record and replay the execution of any software program — no matter how complex — and to diagnose and fix the root cause of any issue in test or production.

Depending on your license, Live Recorder can be used on the command line with the live-record command that is somewhat similar to strace though, instead of printing system calls and signals, it creates an “Undo recording”. Captured failings in recordings can then be debugged (far more effective than grappling with core dumps!). These recordings can also be can be shared with other members of the staff and can be replayed with the reversible debugger to further investigate the cause of the crash or other problem.

The Undo Engine is supported on the following Linux distributions:

  • Red Hat Enterprise Linux 6.8, 6.9, 6.10, 7.4, 7.5, 7.6 and 8.0
  • Fedora 28, 29 and 30
  • SuSE Linux Enterprise Server 12.3, 12.4 and 15
  • Ubuntu 16.04 LTS, 18.04 LTS, 18.10 and 19.04

Undo is a fast-growing, venture-backed technology start-up based in San Francisco and Cambridge, UK. They claim that the Live Recorder provides 100% certainty about the factors that led to any software failure — even in the most complex software environments.

Unix Dweeb

Sandra Henry-Stocker has been administering Unix systems for more than 30 years. She describes herself as "USL" (Unix as a second language) but remembers enough English to write books and buy groceries. She lives in the mountains in Virginia where, when not working with or writing about Unix, she's chasing the bears away from her bird feeders.

The opinions expressed in this blog are those of Sandra Henry-Stocker and do not necessarily represent those of IDG Communications, Inc., its parent, subsidiary or affiliated companies.

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