Tarpaulin

Spec sheet

Purpose

Tarpaulin is a code coverage reporting tool for Rust projects using the Cargo build system.Read 5 Oct 2026 · github.com

Platforms

Linux uses Ptrace by default, which works only on x86_64, while LLVM instrumentation is available; Mac and Windows use LLVM instrumentation by default.Read 5 Oct 2026 · github.com

Security

The Docker instructions use seccomp=unconfined and also describe adjusting the seccomp policy to allow the personality syscall.Read 5 Oct 2026 · github.com

Support

The README welcomes issues, feature requests, and pull requests, and points users to troubleshooting guidance.Read 5 Oct 2026 · github.com

License

Tarpaulin is licensed under both MIT and Apache License 2.0.Read 5 Oct 2026 · github.com

Accuracy

The README cautions that results may have minor inaccuracies and that unusual combinations of packages and build features can cause issues.Read 5 Oct 2026 · github.com

Backend caveats

The README warns that LLVM coverage may not return data when tests exit with a nonzero code and has limitations with thread safety and fork-like system calls.Read 5 Oct 2026 · github.com

Branch coverage

The CLI help labels branch coverage as not implemented.Read 5 Oct 2026 · github.com

CI integrations

The README documents CI use with Travis CI, CircleCI, Jenkins, Codeship, Semaphore, Azure Pipelines, GitHub Actions, and GitLab Pipelines; it says Jenkins is the only one tested among Circle, Semaphore, Jenkins, and Codeship metadata support.Read 5 Oct 2026 · github.com

Coverage

The README describes line coverage as working and warns that results may contain minor inaccuracies.Read 5 Oct 2026 · github.com

Coverage services

The README describes uploading coverage to Coveralls or Codecov.Read 5 Oct 2026 · github.com

Docker

Docker images allow Tarpaulin to run on systems with Docker, and the README notes that required project dependencies may need to be installed in the image.Read 5 Oct 2026 · github.com

Filtering

It supports including or excluding files from coverage results and configurable coverage runs through a TOML file.Read 5 Oct 2026 · github.com

Installation

Tarpaulin is a command-line program installed with Cargo, and the README also mentions Nix and cargo-binstall installation options.Read 5 Oct 2026 · github.com

Linux limit

The default Linux Ptrace backend only works on x86_64; the README says users can switch to LLVM instrumentation with --engine llvm.Read 5 Oct 2026 · github.com

LLVM limitations

LLVM coverage may omit data when tests exit nonzero and has thread-safety and fork-related limitations.Read 5 Oct 2026 · github.com

Operating systems

The README describes use on Linux, Mac, and Windows, and says Tarpaulin can also run in Docker.Read 5 Oct 2026 · github.com

Release signing

The GitHub release page says the 0.37.4 tag and its associated commit were signed with a verified committer signature.Read 5 Oct 2026 · github.com

Reports

Tarpaulin can generate HTML, JSON, stdout, XML, and LCOV coverage reports.Read 5 Oct 2026 · github.com

Test targets

It can collect coverage for tests, doctests, benchmarks, examples, libraries, and binaries.Read 5 Oct 2026 · github.com

Where Specifiction places it

• Test Coverage Tools#24 of 276.9