From: Andrey Ryabinin <a.ryabinin@samsung.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Michal Marek <mmarek@suse.cz>,
Sasha Levin <sasha.levin@oracle.com>,
x86@kernel.org, linux-kbuild@vger.kernel.org,
linux-kernel@vger.kernel.org, "Theodore Ts'o" <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Dmitry Vyukov <dvyukov@google.com>,
Konstantin Khlebnikov <koct9i@gmail.com>
Subject: Re: [RFC PATCH] UBSan: run-time undefined behavior sanity checker
Date: Tue, 21 Oct 2014 14:09:14 +0400 [thread overview]
Message-ID: <544630CA.2000502@samsung.com> (raw)
In-Reply-To: <20141021094714.GR23531@worktop.programming.kicks-ass.net>
On 10/21/2014 01:47 PM, Peter Zijlstra wrote:
> On Mon, Oct 20, 2014 at 02:54:59PM +0400, Andrey Ryabinin wrote:
>>
>> UBSan uses compile-time instrumentation to catch undefined behavior (UB).
>> Compiler inserts code that perform certain kinds of
>> checks before operations that could cause UB.
>> If check fails (i.e. UB detected) __ubsan_handle_* function called.
>> to print error message.
>>
>> So the most of the work is done by compiler.
>> This patch just implements ubsan handlers printing errors.
>>
>> GCC supports this since 4.9, however upcoming GCC 5.0 has
>> more checkers implemented.
>
> It might be useful if you've got a link to the relevant GCC
> documentation of this new shiny stuf.
>
Documentation is very brief (look for fsanitize=undefined): https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html
GCC 4.9.1 doc: https://gcc.gnu.org/onlinedocs/gcc-4.9.1/gcc/Debugging-Options.html
And there is an article which might be interesting: http://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/
next prev parent reply other threads:[~2014-10-21 10:09 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-20 10:54 [RFC] UBSan: run-time undefined behavior sanity checker Andrey Ryabinin
2014-10-20 10:54 ` [RFC PATCH] " Andrey Ryabinin
2014-10-20 19:35 ` Sasha Levin
2014-10-21 8:03 ` Andrey Ryabinin
2014-10-24 8:31 ` y.gribov
2014-10-24 10:36 ` Andrey Ryabinin
2014-10-21 9:47 ` Peter Zijlstra
2014-10-21 10:09 ` Andrey Ryabinin [this message]
2014-10-24 10:30 ` Peter Zijlstra
2014-10-21 17:06 ` Randy Dunlap
2014-10-22 9:58 ` Rasmus Villemoes
2014-10-22 11:16 ` Andrey Ryabinin
2014-10-20 11:03 ` drivers: random: Shift out-of-bounds in _mix_pool_bytes Andrey Ryabinin
2014-10-20 12:49 ` Theodore Ts'o
2014-10-20 13:58 ` Andrey Ryabinin
2014-10-20 14:08 ` Theodore Ts'o
2014-10-20 14:09 ` Daniel Borkmann
2014-10-20 14:13 ` Sasha Levin
2014-10-20 14:16 ` Theodore Ts'o
2014-10-20 14:42 ` Andrey Ryabinin
2014-10-24 10:01 ` Peter Zijlstra
2014-10-24 10:16 ` Andrey Ryabinin
2014-10-24 13:23 ` Sasha Levin
2014-10-24 13:42 ` Peter Zijlstra
2014-10-24 15:04 ` Sasha Levin
2014-10-24 15:10 ` Dmitry Vyukov
2014-10-24 21:05 ` One Thousand Gnomes
2014-10-24 22:23 ` H. Peter Anvin
2014-10-24 22:09 ` Andreas Dilger
2014-10-24 22:22 ` H. Peter Anvin
2014-10-25 0:50 ` Sasha Levin
2014-10-25 20:30 ` One Thousand Gnomes
2014-10-25 20:49 ` Andrey Ryabinin
2014-10-20 11:07 ` kernel: clockevents: shift out-of-bounds Andrey Ryabinin
2014-10-24 10:25 ` Peter Zijlstra
2014-10-20 11:16 ` fs: ext4: mballoc: negative shift exponent Andrey Ryabinin
2014-10-20 11:23 ` jbd2: revoke: negative shift exponent in hash() Andrey Ryabinin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=544630CA.2000502@samsung.com \
--to=a.ryabinin@samsung.com \
--cc=adilger.kernel@dilger.ca \
--cc=akpm@linux-foundation.org \
--cc=dvyukov@google.com \
--cc=hpa@zytor.com \
--cc=koct9i@gmail.com \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=mmarek@suse.cz \
--cc=peterz@infradead.org \
--cc=sasha.levin@oracle.com \
--cc=tglx@linutronix.de \
--cc=tytso@mit.edu \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).