From: Kees Cook <keescook@google.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Randy Dunlap <rdunlap@infradead.org>,
Olof Johansson <olof@lixom.net>, Mark Brown <broonie@kernel.org>,
info@kernelci.org, Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Will Deacon <will.deacon@arm.com>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
LKML <linux-kernel@vger.kernel.org>,
Linux-Next <linux-next@vger.kernel.org>,
Fengguang Wu <fengguang.wu@intel.com>,
Andrew Donnellan <andrew.donnellan@au1.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Laura Abbott <labbott@redhat.com>,
"x86@kernel.org" <x86@kernel.org>,
PaX Team <pageexec@freemail.hu>, Emese Revfy <re.emese@gmail.com>
Subject: Re: enabling COMPILE_TEST support for GCC plugins in v4.11
Date: Fri, 9 Dec 2016 11:13:20 -0800 [thread overview]
Message-ID: <CAGXu5jKtoN+uUa5zCmHR0=s8907kS3x30xMNc+s-On0_nyGiHg@mail.gmail.com> (raw)
In-Reply-To: <5572017.jUy2fe8FTb@wuerfel>
On Fri, Dec 9, 2016 at 3:33 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Thursday, December 8, 2016 11:00:42 AM CET Kees Cook wrote:
>> Hi,
>>
>> I'd like to get the GCC plugins building under
>> allyesconfig/allmodconfig for -next soon (with the intention of
>> landing the change in v4.11). Specifically, I intend to revert
>> a519167e753e ("gcc-plugins: disable under COMPILE_TEST").
>>
>> Right now the plugins are only supported on x86, arm, and arm64,
>> though powerpc may happen in either v4.10 or v4.11 as well. This means
>> that the autobuilders for these architectures need to have the "gcc
>> plugin development" package installed which contains the GCC headers
>> needed for the plugins. For Debian/Ubuntu, this is gcc-$N-plugin-dev
>> (and for cross compilers: gcc-$N-plugin-dev-$arch-linux-$abi). For
>> Fedora, it is gcc-plugin-devel (though I'm not sure the naming for
>> cross compilers). Manual builds of compilers should already have these
>> headers installed.
>>
>> The "noisy" plugin, cyc_complexity, is just an example, and I have
>> disabled it (which is pending[1] for v4.10). The remaining ones
>> (sancov and latent_entropy) are what I'm hoping to see tested
>> tree-wide (with the expectation that more are coming down the road:
>> initify, randstruct, structleak, constify, ...)
>>
>> IIUC, the 0day builder already has the headers installed. I tried to
>> look through linux-next to find all the other folks that do
>> autobuilding on these architectures; apologies if I've missed anyone.
>>
>> If you have a moment, applying 215e2aa6c024[1] and reverting
>> a519167e753e for an allyesconfig/allmodconfig build should let you
>> know if things are working correctly with headers installed. If anyone
>> sees any problems, please let me know and I can queue up fixes.
>>
>> Thanks!
>>
>> -Kees
>>
>> [1] http://git.kernel.org/cgit/linux/kernel/git/kees/linux.git/commit/?h=for-next/gcc-plugins&id=215e2aa6c024d27cdbe88e2ea88cb59dcab588eb
>
> This is what I got on x86-64 with a gcc-7.0.0 snapshot:
>
> In file included from /git/arm-soc/scripts/gcc-plugins/gcc-common.h:42:0,
> from <stdin>:1:
> /home/arnd/cross-gcc/lib/gcc/x86_64-linux/7.0.0/plugin/include/emit-rtl.h:371:41: error: use of enum ‘memmodel’ without previous declaration
> extern bool need_atomic_barrier_p (enum memmodel, bool);
> ^
> In file included from /git/arm-soc/scripts/gcc-plugins/gcc-common.h:94:0,
> from <stdin>:1:
> /home/arnd/cross-gcc/lib/gcc/x86_64-linux/7.0.0/plugin/include/tree-ssanames.h:70:40: error: use of enum ‘value_range_type’ without previous declaration
> extern void set_range_info (tree, enum value_range_type, const wide_int_ref &,
> ^
> /home/arnd/cross-gcc/lib/gcc/x86_64-linux/7.0.0/plugin/include/tree-ssanames.h:73:13: error: use of enum ‘value_range_type’ without previous declaration
> extern enum value_range_type get_range_info (const_tree, wide_int *,
> ^
> /home/arnd/cross-gcc/lib/gcc/x86_64-linux/7.0.0/plugin/include/tree-ssanames.h:98:55: error: use of enum ‘value_range_type’ without previous declaration
> extern void duplicate_ssa_name_range_info (tree, enum value_range_type,
> ^
> Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?
> scripts/Makefile.gcc-plugins:51: recipe for target 'gcc-plugins-check' failed
>
> I manually fixed up the gcc header files to include the ones with the
> definition for now, to address those, but I don't know if that change is
> correct.
What was needed?
-Kees
--
Kees Cook
Nexus Security
next prev parent reply other threads:[~2016-12-09 19:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-08 19:00 enabling COMPILE_TEST support for GCC plugins in v4.11 Kees Cook
2016-12-09 1:52 ` Paul Gortmaker
2016-12-09 4:15 ` Kees Cook
2017-06-23 5:43 ` Michael Ellerman
2017-06-23 18:35 ` Kees Cook
2017-06-23 21:16 ` Tony Breeds
2016-12-09 10:40 ` Arnd Bergmann
2016-12-09 19:12 ` Kees Cook
2016-12-09 19:40 ` Linus Torvalds
2017-06-23 0:18 ` Kees Cook
2016-12-10 16:45 ` Emese Revfy
2016-12-16 21:05 ` Kees Cook
2016-12-09 11:33 ` Arnd Bergmann
2016-12-09 19:13 ` Kees Cook [this message]
2016-12-09 20:35 ` Arnd Bergmann
2016-12-09 21:08 ` kugan
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