BullseyeCoverage

BullseyeCoverage instruments C and C++ code to measure how thoroughly tests exercise it. It is best suited to developers and testers working on mission-critical or embedded software. Its detailed coverage metrics are a strength, but the perpetual license, host-specific licensing and reported runtime overhead deserve consideration.

Overview

The tool focuses on C and C++, covering standard versions from C90 and C++98 through the latest versions, as well as compiler extensions. Function coverage shows whether functions run; condition/decision coverage examines decision logic in more detail than statement or branch counts. That depth can help teams assess test completeness, though it is more specialized than a broad, multi-language coverage tool.

Key features

Reports and merged results

Coverage Browser offers interactive inspection, while reports can be generated in HTML, text, or annotated source code. XML, Cobertura, and CSV formats support export and downstream handling, and results from multiple computers can be merged. This suits teams consolidating coverage across machines without relying on one report format.

Compiler and tool compatibility

Supported tools include Visual Studio, Clang, GCC, Xcode, CMake, Eclipse, and embedded development tools such as Code Composer Studio. Integrations or support also involve Teamscale, MathWorks Embedded Coder, and TICS. This range makes BullseyeCoverage relevant to varied C/C++ build environments, including embedded workflows.

Instrumentation trade-offs

The maker reports instrumented execution time rising to 1.3–1.9× and code and data size rising to 1.4×; build-time increases vary by compiler. These costs matter for constrained targets and slow test cycles, so teams should weigh the richer coverage view against their performance and storage budgets.

Pricing

Evaluation license

The Evaluation license costs nothing. It is fully functional but temporary, expires at the end of the evaluation period, and must be requested by email. It gives teams a way to assess the product before committing, but is not a continuing free tier.

BullseyeCoverage license

The BullseyeCoverage license uses custom pricing and is a perpetual license, with optional maintenance and renewal. Licensing is based on the maximum number of users at one time, and each host operating system is licensed separately; discounts apply for 10 or more users. A continuous integration system counts as one user. Technical support is included with every purchase.

The license agreement includes an anti-virus warranty and a 90-day warranty that the software will substantially perform according to its documentation. Teams budgeting for multiple host operating systems should account for separate licenses.

Platforms

BullseyeCoverage supports Windows, Linux desktop and server, macOS, and embedded systems. The license terms distinguish host operating systems, making the supported environment relevant to both deployment and licensing decisions.

Who it's for

This is a focused choice for C/C++ developers and testers who need function and condition/decision coverage, especially on mission-critical or embedded systems. Genuen offers a Tool Qualification Kit supporting processes for DO-178B/C, ISO 26262, and IEC 62304; teams working under those standards may find that qualification support relevant. It is less suitable for teams seeking coverage across languages beyond C and C++.

Pros and cons

Pros: Function and condition/decision metrics provide more detail than statement or branch coverage alone.

Pros: Multiple report and export formats, plus mergeable results from multiple computers, support varied review and aggregation workflows.

Pros: Compatibility with mainstream and embedded development tools suits a range of C/C++ environments.

Cons: The reported execution-time and code/data-size increases can be consequential on constrained targets or lengthy test runs.

Cons: The paid license has custom pricing, and separate host operating systems require separate licenses.

Cons: Its language focus excludes teams that need one coverage tool for other languages.

Alternatives

For open-source projects seeking a free coverage option, Coveralls is free for open-source and public repositories. ReportGenerator has a free open-source basic plan and a 10-day full-access trial, making it worth considering when those terms fit. Codecov offers a free Developer plan with up to 250 private repository uploads and unlimited public repositories, a different fit for teams whose needs align with those quotas.

OpenClover is a free option with no license tiers, keys, or usage limits. gcov is free but requires GCC-compiled code and coverage instrumentation. SimpleCov is a free, MIT-licensed Ruby coverage tool; cargo-llvm-cov is free and open source for Rust; and Coverage.py is an open-source Python coverage tool with an enterprise subscription available through Tidelift. For more choices, see Test Coverage Tools.

Verdict

BullseyeCoverage is a strong fit for C/C++ teams that need detailed function and condition/decision coverage across desktop, server, or embedded environments. Its report flexibility and tool compatibility are compelling, particularly for mission-critical work. Look elsewhere if you need broader language coverage, cannot absorb the reported instrumentation overhead, or need a clearly priced license with no separate host operating system charges.