Add code-coverage option to mach run, test-wpt and test-devtools #39916
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Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
This command can be used to generate a coverage report after running an instrumented servo binary. Cleaning up is currently left to the user. Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
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Also add a
./mach coverage-reportcommand to usecargo llvm-covto generate a coverage report from the raw profiles.The workflow is:
Note that
./mach test-wpt --coveragewill require lots of diskspace (multiple 100s of GBs) at the moment. Also note that./mach test-devtools --coveragewill not produce any coverage profiles yet, since the test runner kills the servo binary, which prevents writing the profile data at shutdown.Testing: Describe how this pull request is tested or why it doesn't require tests
Fixes: Link to an issue this pull requests fixes or remove this line if there is no issue