- executed - this line of code was hit during execution
- instrumented - this line of code was part of the compilation unit, but not executed
- missing - in a source file, but not compiled.
- ignored - not an executable line, or a line we don't care about
Coverage is calculated as exe / (inst + miss). In general, lines that are in
miss should be ignored, but our exclusion rules are not good enough.
Buildbots are currently on the experimental waterfall. The coverage figures they calculate come from running some subset of the chromium testing suite.
Also,
- Coverage dashboard
- Example coverage summary
- the coverage is calculated at directory and file level, and the directory structure is navigable via the Subdirectories table.
TODO
Sometimes a line of code should never be reached (e.g., NOTREACHED()). These
can be marked in the source with // COV_NF_LINE. Note that this syntax is
exact.