linux-kernel - Re: [PATCH v2 8/8] kallsyms: Add self-test facility

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Date:   Sat, 17 Sep 2022 20:40:49 +0800
From:   "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
To:     Kees Cook <keescook@...omium.org>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Petr Mladek <pmladek@...e.com>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        <live-patching@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Masahiro Yamada" <masahiroy@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Luis Chamberlain" <mcgrof@...nel.org>,
        <linux-modules@...r.kernel.org>
Subject: Re: [PATCH v2 8/8] kallsyms: Add self-test facility



On 2022/9/17 16:07, Kees Cook wrote:
> 
> 
> On September 9, 2022 2:00:16 PM GMT+01:00, Zhen Lei <thunder.leizhen@...wei.com> wrote:
>> Add some test cases to test the function and performance of some kallsyms
>> interfaces, such as kallsyms_lookup_name. It also calculates the
>> compression rate of the kallsyms compression algorithm for the current
>> symbol set.
>>
>> Start self-test automatically after system startup.

if CONFIG_KALLSYMS_SELFTEST=y

> 
> I wonder if this would be better implemented as a kunit test? Shouldn't be too hard to convert. Take a look at things like lib/overflow_kunit.c, etc.

Yes, I can try to define one for each type of symbol, such as: bss, data, weak, static.
In addition, we can use kallsyms_offsets[] to do a full test.

> 
> -Kees
> 

-- 
Regards,
  Zhen Lei