linux-kernel - Re: [PATCH v2 20/21] gcc-plugins: enable GCC_PLUGINS for COMPILE

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Message-ID: <CAGXu5jLTzqe3MVZnY+SOrreUBUZZOsEDsZNuS66ZxXjRzywv3A@mail.gmail.com>
Date:   Tue, 10 Apr 2018 00:00:03 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-kbuild <linux-kbuild@...r.kernel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Ulf Magnusson <ulfalizer@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        "Luis R . Rodriguez" <mcgrof@...nel.org>,
        Nicolas Pitre <nico@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 20/21] gcc-plugins: enable GCC_PLUGINS for COMPILE_TEST

On Mon, Apr 9, 2018 at 11:15 PM, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
> Can you explain a bit more about GCC_PLUGIN_RANDSTRUCT_PERFORMANCE?
>
> IIUC, this option reduces the randomization.

Correct: I don't want to do COMPILE_TEST buids with
GCC_PLUGIN_RANDSTRUCT_PERFORMANCE since it is effectively a subset of
the GCC_PLUGIN_RANDSTRUCT possibilities. So, ..._PERFORMANCE shouldn't
be enabled for COMPILE_TEST, as that would reduce the coverage for
buid tests.

-Kees

-- 
Kees Cook
Pixel Security