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| author | Daniel Latypov <dlatypov@google.com> | 2021-04-14 15:22:56 -0700 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2021-05-21 13:25:45 -0600 |
| commit | 11dbc62a73a7da9f3697e8ce83d07503c11dcabb (patch) | |
| tree | 460a3b8d3d7ef1b4c0f1c97c292e75cb1e1053b4 /Documentation/dev-tools/kunit/index.rst | |
| parent | d07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff) | |
Documentation: kunit: add tips for running KUnit
This is long overdue.
There are several things that aren't nailed down (in-tree
.kunitconfig's), or partially broken (GCOV on UML), but having them
documented, warts and all, is better than having nothing.
This covers a bunch of the more recent features
* kunit_filter_glob
* kunit.py run --kunitconfig
* slightly more detail on building tests as modules
* CONFIG_KUNIT_DEBUGFS
By my count, the only headline features now not mentioned are the KASAN
integration and KernelCI json output support (kunit.py run --json).
And then it also discusses how to get code coverage reports under UML
and non-UML since this is a question people have repeatedly asked.
Non-UML coverage collection is no different from normal, but we should
probably explicitly call this out.
As for UML, I was able to get it working again with two small hacks.*
E.g. with CONFIG_KUNIT=y && CONFIG_KUNIT_ALL_TESTS=y
Overall coverage rate:
lines......: 15.1% (18294 of 120776 lines)
functions..: 16.8% (1860 of 11050 functions)
Note: this doesn't document --alltests since this is not stable yet.
Hopefully being run more frequently as part of KernelCI will help...
*Using gcc/gcov-6 and not using uml_abort() in os_dump_core().
I've documented these hacks in "Notes" but left TODOs for
brendanhiggins@google.com who tracked down the runtime issue in GCC.
To be clear: these are not issues specific to KUnit, but rather to UML.
Signed-off-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'Documentation/dev-tools/kunit/index.rst')
| -rw-r--r-- | Documentation/dev-tools/kunit/index.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/dev-tools/kunit/index.rst b/Documentation/dev-tools/kunit/index.rst index 848478838347..7f7cf8d2ab20 100644 --- a/Documentation/dev-tools/kunit/index.rst +++ b/Documentation/dev-tools/kunit/index.rst @@ -14,6 +14,7 @@ KUnit - Unit Testing for the Linux Kernel style faq tips + running_tips What is KUnit? ============== |