linux-kernel - Re: [PATCH v2 1/2] kunit: support failure from dynamic analysis tools

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Date:   Tue, 9 Feb 2021 14:21:35 -0800
From:   Daniel Latypov <dlatypov@...gle.com>
To:     Alan Maguire <alan.maguire@...cle.com>
Cc:     Brendan Higgins <brendanhiggins@...gle.com>,
        David Gow <davidgow@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        KUnit Development <kunit-dev@...glegroups.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Uriel Guajardo <urielguajardo@...gle.com>
Subject: Re: [PATCH v2 1/2] kunit: support failure from dynamic analysis tools

On Tue, Feb 9, 2021 at 2:12 PM Alan Maguire <alan.maguire@...cle.com> wrote:
>
> On Tue, 9 Feb 2021, Daniel Latypov wrote:
>
> > On Tue, Feb 9, 2021 at 9:26 AM Alan Maguire <alan.maguire@...cle.com> wrote:
> > >
> > > On Fri, 5 Feb 2021, Daniel Latypov wrote:
> > >
> > > > From: Uriel Guajardo <urielguajardo@...gle.com>
> > > >
> > > > 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
> > > >
> > >
> > > Thanks for doing this!
> > >
> > > > * Declare it as a function for nice __printf() warnings about mismatched
> > > > format strings even when KUnit is not enabled.
> > > >
> > >
> > > One thing I _think_ this assumes is that KUnit is builtin;
> > > don't we need an
> >
> > Ah, you're correct.
> > Also going to rename it to have two _ to match other functions used in
> > macros like __kunit_test_suites_init.
> >
>
> Great! If you're sending out an updated version with these
> changes, feel free to add
>
> Reviewed-by: Alan Maguire <alan.maguire@...cle.com>

Oops, there was a race in sending v3 and seeing this in my inbox.

If you could reply to the v3 that'd be great. I've already amended the
commit locally.
Thanks!