llvm-cov
Toolllvm-cov is a command-line tool distributed with LLVM that reads coverage instrumentation data and produces coverage reports. It is the reporting component of LLVM's source-based code coverage workflow.
First seen 7/28/2026
Last seen 7/28/2026
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WIKI
llvm-cov
Overview
llvm-cov is a command-line utility shipped with LLVM that converts raw profile data produced by LLVM's instrumentation-based coverage passes into human-readable coverage reports (text, HTML, and JSON formats). It works in conjunction with the instrumentation emitted by compilers such as clang and rustc when source-based code coverage is enabled.
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2 connectionsllvm-cov is a tool distributed as part of the LLVM project, as indicated by the version string referencing llvm version.
llvm-cov generates coverage reports based on the Source-Based Code Coverage technique documented by Clang.
CITATIONS
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[1] llvm-cov is a tool generated by and shipped with LLVM that produces source-based code coverage reports. Coverage Report
[2] The coverage report links to the official LLVM documentation on interpreting source-based code coverage reports at clang.llvm.org. Coverage Report
[3] The llvm-cov binary used to generate the example report identifies its LLVM version as 21.1.8-rust-1.94.0-stable. Coverage Report
[4] cargo-llvm-cov is a Cargo subcommand that wraps LLVM source-based code coverage, including the -C instrument-coverage rustc flag, and provides a high-level driver around llvm-cov. taiki-e/cargo-llvm-cov