On Fri, Jun 24, 2022 at 8:12 AM 'Daniel Latypov' via KUnit Development kunit-dev@googlegroups.com wrote:
Now that kunit.py's --kunitconfig is repeatable, let's create a file to hold the various options needed to enable coverage under UML.
This can be used like so: $ ./tools/testing/kunit/kunit.py run \ --kunitconfig=tools/testing/kunit/configs/all_tests_uml.config \ --kunitconfig=tools/testing/kunit/configs/coverage_uml.config \ --make_options=CC=/usr/bin/gcc-6
which on my system is enough to get coverage working [1].
This is still a clunky command, but far better than before.
[1] at the time of this commit, I get: Overall coverage rate: lines......: 11.6% (34112 of 295033 lines) functions..: 15.3% (3721 of 24368 functions)
Signed-off-by: Daniel Latypov dlatypov@google.com
Looks good to me: depending on whether or not we do something like [1], we should add a pci_uml.config as well.
Alas, I don't have a working gcc 6 install anymore, so I wasn't able to test the coverage here, but I at least got an encouraging-looking error, and the change looks very sensible, so:
Reviewed-by: David Gow davidgow@google.com
Cheers, -- David
[1] https://lore.kernel.org/linux-kselftest/20220622035326.759935-1-davidgow@goo...
Documentation/dev-tools/kunit/running_tips.rst | 3 +-- tools/testing/kunit/configs/coverage_uml.config | 11 +++++++++++ 2 files changed, 12 insertions(+), 2 deletions(-) create mode 100644 tools/testing/kunit/configs/coverage_uml.config
diff --git a/Documentation/dev-tools/kunit/running_tips.rst b/Documentation/dev-tools/kunit/running_tips.rst index c36f6760087d..205ea21c9cca 100644 --- a/Documentation/dev-tools/kunit/running_tips.rst +++ b/Documentation/dev-tools/kunit/running_tips.rst @@ -123,8 +123,7 @@ Putting it together into a copy-pastable sequence of commands: .. code-block:: bash
# Append coverage options to the current config
$ echo -e "CONFIG_DEBUG_KERNEL=y\nCONFIG_DEBUG_INFO=y\nCONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y\nCONFIG_GCOV=y" >> .kunit/.kunitconfig$ ./tools/testing/kunit/kunit.py run
$ ./tools/testing/kunit/kunit.py run --kunitconfig=.kunit/ --kunitconfig=tools/testing/kunit/configs/coverage_uml.config # Extract the coverage information from the build dir (.kunit/) $ lcov -t "my_kunit_tests" -o coverage.info -c -d .kunit/diff --git a/tools/testing/kunit/configs/coverage_uml.config b/tools/testing/kunit/configs/coverage_uml.config new file mode 100644 index 000000000000..bacb77664fa8 --- /dev/null +++ b/tools/testing/kunit/configs/coverage_uml.config @@ -0,0 +1,11 @@ +# This config fragment enables coverage on UML, which is different from the +# normal gcov used in other arches (no debugfs). +# Example usage: +# ./tools/testing/kunit/kunit.py run \ +# --kunitconfig=tools/testing/kunit/configs/all_tests_uml.config \ +# --kunitconfig=tools/testing/kunit/configs/coverage_uml.config
+CONFIG_DEBUG_KERNEL=y +CONFIG_DEBUG_INFO=y +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_GCOV=y
2.37.0.rc0.104.g0611611a94-goog
-- You received this message because you are subscribed to the Google Groups "KUnit Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to kunit-dev+unsubscribe@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/kunit-dev/20220624001247.3255978-2-dlatypo....