Re: [PATCH v4 1/2] kunit: support failure from dynamic analysis tools

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On 4/2/21 2:55 AM, Brendan Higgins wrote:
On Thu, Mar 11, 2021 at 7:23 AM Daniel Latypov <dlatypov@xxxxxxxxxx> wrote:

From: Uriel Guajardo <urielguajardo@xxxxxxxxxx>

Add a kunit_fail_current_test() function to fail the currently running
test, if any, with an error message.

This is largely intended for dynamic analysis tools like UBSAN and for
fakes.
E.g. say I had a fake ops struct for testing and I wanted my `free`
function to complain if it was called with an invalid argument, or
caught a double-free. Most return void and have no normal means of
signalling failure (e.g. super_operations, iommu_ops, etc.).

Key points:
* Always update current->kunit_test so anyone can use it.
   * commit 83c4e7a0363b ("KUnit: KASAN Integration") only updated it for
   CONFIG_KASAN=y

* Create a new header <kunit/test-bug.h> so non-test code doesn't have
to include all of <kunit/test.h> (e.g. lib/ubsan.c)

* Forward the file and line number to make it easier to track down
failures

* Declare the helper function for nice __printf() warnings about mismatched
format strings even when KUnit is not enabled.

Example output from kunit_fail_current_test("message"):
[15:19:34] [FAILED] example_simple_test
[15:19:34]     # example_simple_test: initializing
[15:19:34]     # example_simple_test: lib/kunit/kunit-example-test.c:24: message
[15:19:34]     not ok 1 - example_simple_test

Co-developed-by: Daniel Latypov <dlatypov@xxxxxxxxxx>
Signed-off-by: Daniel Latypov <dlatypov@xxxxxxxxxx>
Signed-off-by: Uriel Guajardo <urielguajardo@xxxxxxxxxx>
Reviewed-by: Alan Maguire <alan.maguire@xxxxxxxxxx>

Reviewed-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>


Please run checkpatch on your patches in the future. I am seeing
a few checkpatch readability type improvements that can be made.

Please make changes and send v2 with Brendan's Reviewed-by.

thanks,
-- Shuah



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