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Empty Coverage File

Symptoms

BullseyeCoverage reports no measurements. The Coverage Browser and covhtml show empty regions only.

Coverage Browser

covhtml

Cause

There are two possible causes:

1. Coverage build was not enabled when the project was built.

2. All measurements are excluded.

Resolution

1. Verify that coverage build is enabled before rebuilding. Run the Coverage Browser and use the menu command Tools Options. In the Build tab under the Integration section, verify your compiler is selected. See also Integrating With Your Build Process.

2. Rebuild without any exclusions. Remove your coverage file to clear any exclusions. Remove the covselect command from your build process. Remove any covc.cfg files, for example $HOME/covc.cfg. After rebuilding, recreate your exclusions. See Excluding Code

   There are two recommendations for excluding code which both should be followed if possible.

   • Do not use covselect -a/--add. Instead, use the Coverage Browser to make exclusions and export them. Import those exclusions with covselect --import to apply them to a clean build. See Excluding Code for more details.

   • If the build invokes covselect, invoke it at the end rather than the beginning. Applying exclusions before building requires rebuilding in order to modify the exclusions and have them take effect. Exclusions applied after building can be adjusted without rebuilding.

Updated: 26 May 2020

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