How do I read cover-user information

[veripoolbot]

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Author Name: Flemming Andersen
Original Redmine Issue: 1362 from https://www.veripool.org

Original Assignee: Flemming Andersen

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As part of measuring coverage and validation quality, I have now successfully added SVA cover points and an SVA bind file to the compilation of the Verilog design that I am currently working with.
I believe that I have also enabled the coverage by adding --assert and --coverage-user to the flags when I call verilator.

However, when I run the coverage enhanced design with test cases that should activate the cover points, I still do not see any generated coverage output.

Can somebody please tell me what I am missing:

1. Do I need to call a special coverage-user function in my sim_main.cpp module?
2. Where do I read the generated coverage data?
3. Something else?

Thanks,
Flemming

[veripoolbot]

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Original Redmine Comment
Author Name: Wilson Snyder (@wsnyder)
Original Date: 2018-10-18T03:09:27Z

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Perhaps you are missing the save of the coverage data? See the examples/tracing_c files it does coverage.

[veripoolbot]

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Original Redmine Comment
Author Name: Flemming Andersen
Original Date: 2018-10-18T23:37:46Z

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Thank you so much for pointing me to this example - that solved the generation issue!
I can now generate coverage both as inline SVA properties and properties bound through a bind file.

Running verilator_coverage I can also get the total statistic number, but no details.

Is there also a method/tool to create graphical visualization of the coverage points in the coverage.dat file?

[veripoolbot]

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Original Redmine Comment
Author Name: Wilson Snyder (@wsnyder)
Original Date: 2018-10-19T00:03:43Z

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Perhaps you forgot to give the --annotate option? At present output is always ASCII. Patches for improving to add e.g. HTML output would be welcome.

Closing as think no problem here, but ask more if needed.