From: Luc Pelletier <lucp.at.work@gmail.com>
To: David Marchand <david.marchand@redhat.com>
Cc: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
"Richardson, Bruce" <bruce.richardson@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Li, Xiaoyun" <xiaoyun.li@intel.com>,
"stable@dpdk.org" <stable@dpdk.org>,
Aaron Conole <aconole@redhat.com>,
Owen Hilyard <ohilyard@iol.unh.edu>
Subject: Re: [PATCH v7] eal: fix rte_memcpy strict aliasing/alignment bugs
Date: Fri, 8 Apr 2022 09:47:59 -0400 [thread overview]
Message-ID: <CAFeRdtBMSnE34nNsANg0hmXva5dEsT=Zujf+MoO2d04Cwd8GjA@mail.gmail.com> (raw)
In-Reply-To: <CAJFAV8yxK-qqQtNLrNFqyo1T+6qTSGfotSGufgR1SOY1muMzdg@mail.gmail.com>
Hi David,
Le jeu. 7 avr. 2022 à 11:24, David Marchand
<david.marchand@redhat.com> a écrit :
> > As a side note, we probably need to check other similar places in DPDK code.
>
> What would be the best way to detect those problematic places?
As far as I'm aware, there is no silver bullet to detect all strict
aliasing violations. A good summary of the different options are
described here:
https://gist.github.com/shafik/848ae25ee209f698763cffee272a58f8#catching-strict-aliasing-violations
However, this is not 100% and might still miss some strict aliasing violations.
The bottom line is that anywhere there's a cast to something other
than void* or char*, it could be a strict aliasing violation. So,
doing an exhaustive search throughout the code base for casts seems
like the only (tedious, time-consuming) solution.
next prev parent reply other threads:[~2022-04-08 13:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-15 19:41 [PATCH] eal: fix unaligned loads/stores in rte_memcpy_generic Luc Pelletier
2022-01-15 21:39 ` [PATCH v2] " Luc Pelletier
2022-01-15 22:13 ` Stephen Hemminger
2022-01-16 14:09 ` Luc Pelletier
2022-01-16 16:32 ` Stephen Hemminger
2022-01-16 14:13 ` [PATCH v3] " Luc Pelletier
2022-01-16 14:33 ` Luc Pelletier
2022-01-16 16:34 ` Stephen Hemminger
2022-01-16 17:59 ` Morten Brørup
2022-01-16 20:33 ` [PATCH v4] " Luc Pelletier
2022-01-17 15:37 ` [PATCH v5] " Luc Pelletier
2022-02-04 16:42 ` Luc Pelletier
2022-02-04 17:16 ` Ananyev, Konstantin
2022-02-08 16:53 ` Thomas Monjalon
2022-02-09 15:05 ` Luc Pelletier
2022-02-10 14:04 ` Ananyev, Konstantin
2022-02-10 16:56 ` Luc Pelletier
2022-02-11 15:51 ` Ananyev, Konstantin
2022-02-13 22:31 ` Luc Pelletier
2022-02-14 13:41 ` Ananyev, Konstantin
2022-02-25 15:51 ` [PATCH v6] eal: fix rte_memcpy strict aliasing/alignment bugs Luc Pelletier
2022-02-25 16:38 ` [PATCH v7] " Luc Pelletier
2022-03-10 14:55 ` Ananyev, Konstantin
2022-04-07 15:24 ` David Marchand
2022-04-07 15:32 ` David Marchand
2022-04-07 15:40 ` David Marchand
2022-05-13 19:15 ` Luc Pelletier
2022-05-19 16:41 ` David Marchand
2022-04-08 13:47 ` Luc Pelletier [this message]
2022-05-19 16:47 ` David Marchand
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