UDB

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

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About

UDB is ranked #18 of 27 in debuggers on Inferse. It runs on Browser extension, Linux. There is no free plan. A free trial is offered.

Compared on debuggers

Free plan: Noundo.io
Supported languages: C, C++undo.io
Target platforms: Linuxundo.io
Remote debugging: Yesundo.io
Conditional breakpoints: Yesundo.io
Exception breakpoints: Yesundo.io
Time-travel debugging: Yesundo.io
Core dump debugging: Yesundo.io

Facts

Purpose: UDB is an interactive time travel debugger for Linux C/C++ that records program execution so developers can replay it and inspect state.undo.io · 3 Oct 2026
Debugging: UDB supports forward and reverse execution with variable and memory inspection, scripting, conditional breakpoints, and watchpoints.undo.io · 3 Oct 2026
Workflow: Users can launch a program in UDB or attach it to a running process.undo.io · 3 Oct 2026
GDB compatibility: Undo says UDB is 100% compatible with GDB and adds a handful of commands for time travel debugging.undo.io · 3 Oct 2026
IDE integrations: The product page names Visual Studio Code, CLion, Eclipse, and Emacs integrations; the Eclipse guide labels that integration experimental.undo.io · 3 Oct 2026
AI debugging: UDB's explain command lets an AI coding assistant drive the debugger using an Undo recording to investigate a problem.undo.io · 3 Oct 2026
Setup: Undo says UDB requires no compilation or build changes and no kernel or system configuration.undo.io · 3 Oct 2026
Supported environment: The documented engine requires 64-bit Linux and supports 32-bit and 64-bit x86 processes with standard license configurations; ARM support is opt-in.docs.undo.io · 3 Oct 2026
Operating system limit: The engine does not support non-Linux operating systems such as Windows or macOS.docs.undo.io · 3 Oct 2026
Kernel-space limit: UDB supports user-space code only, not kernel-space code.undo.io · 3 Oct 2026
Trial: Undo offers a free trial, but the pages opened here do not state its duration.undo.io · 3 Oct 2026
Security and evaluation: Undo says customers can evaluate UDB within their firewall without sending anything externally.undo.io · 3 Oct 2026
Team support: The enterprise team package includes white-glove support with direct access to Undo's engineering team.undo.io · 3 Oct 2026
Intended users: Undo describes UDB as suited to individual developers and highlights race conditions, deadlocks, memory corruption, segfaults, and stack corruption as debugging use cases.undo.io · 3 Oct 2026