🎯 If you have an if statement like if (a || b) , statement coverage is satisfied if the whole line runs. Bullseye, however, will tell you if you've tested the case where a is true, where b is true, and where both are false. This prevents "hidden" bugs in complex logic from slipping through to production. How Bullseye Works
You run your test suite normally (unit tests, integration tests, fuzzing). As the binary executes, the probes increment counters in shared memory or a .cov data file. Bullseye is remarkably low-overhead—typically 10-30% slowdown, making it viable for large test suites.
This keeps your "bullseye" metric focused on testable logic , not boilerplate. bullseye code coverage
During the build process, Bullseye modifies your source code (at the intermediate level) to insert "probes."
After the test run, you use the Bullseye tools to analyze the .cov file. 🎯 If you have an if statement like
Use Bullseye as a necessary but insufficient condition for quality.
Create a toolchain file bullseye-toolchain.cmake : How Bullseye Works You run your test suite
Bullseye generates a detailed report, often viewable in a dedicated browser or exported to HTML/XML, highlighting exactly which conditions were missed. Benefits for Development Teams
The Bullseye code coverage analysis reveals areas of the codebase that require additional testing. By focusing on improving test coverage for these areas, we can increase the overall reliability and quality of the codebase.