From: Remy Horton <remy.horton@intel.com>
To: Panu Matilainen <pmatilai@redhat.com>, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 8/8] drivers/net/ixgbe: Fix uninitialized warning
Date: Fri, 11 Mar 2016 09:22:20 +0000 [thread overview]
Message-ID: <56E28E4C.20502@intel.com> (raw)
In-Reply-To: <56E18CA5.4090200@redhat.com>
On 10/03/2016 15:03, Panu Matilainen wrote:
> On 03/10/2016 04:45 PM, Remy Horton wrote:
[...]
>> In two minds about this. It is a logical impossibility, but these days
>> optimising compilers are getting very aggressive. For instance GCC has a
>> delightfully-named -fdelete-null-pointer-checks option, which caused
>> security holes..
>
> Indeed, that's why silencing a false positive (assuming it actually is
> one) by throwing some more NULL-checks for the allegedly impossible
> makes me a bit nervous. Besides compiler optimizations going crazy, I've
> seen such extra NULL-checks turn into actual bugs when surroundings
> subtly change.
It cuts both ways. To anyone who is not an active compiler engineer,
fixing a warning being /more/ likley to screw things up is quite a big
thing. Do we want to turn off warnings or turn off optimisations.. :)
..Remy
next prev parent reply other threads:[~2016-03-11 9:23 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-25 18:48 [dpdk-dev] [PATCH 0/8] Various fixes to compile with gcc6 Aaron Conole
2016-02-25 18:48 ` [dpdk-dev] [PATCH 1/8] lpm: Fix pointer aliasing issues Aaron Conole
2016-02-25 21:30 ` Bruce Richardson
2016-02-25 22:00 ` Aaron Conole
2016-03-22 20:02 ` Thomas Monjalon
2016-03-22 20:47 ` Aaron Conole
2016-02-25 18:48 ` [dpdk-dev] [PATCH 2/8] app/test/test: Fix missing brackets Aaron Conole
2016-03-10 13:25 ` Panu Matilainen
2016-03-18 1:05 ` Zhang, Helin
2016-02-25 18:48 ` [dpdk-dev] [PATCH 3/8] drivers/net/e1000: " Aaron Conole
2016-02-26 1:02 ` Lu, Wenzhuo
2016-02-26 13:13 ` Aaron Conole
2016-03-01 11:02 ` Panu Matilainen
2016-03-22 20:06 ` Thomas Monjalon
2016-03-18 1:03 ` Zhang, Helin
2016-02-25 18:48 ` [dpdk-dev] [PATCH 4/8] drivers/net/e1000: Fix missing lsc interrupt check brackets Aaron Conole
2016-03-10 13:27 ` Panu Matilainen
2016-03-18 0:55 ` Zhang, Helin
2016-02-25 18:48 ` [dpdk-dev] [PATCH 5/8] drivers/net/ixgbe: Fix vlan filter missing brackets Aaron Conole
2016-03-10 13:28 ` Panu Matilainen
2016-03-18 0:45 ` Zhang, Helin
2016-02-25 18:48 ` [dpdk-dev] [PATCH 6/8] drivers/net/e1000/igb: Signed left shift operator Aaron Conole
2016-03-10 13:29 ` Panu Matilainen
2016-03-18 0:54 ` Zhang, Helin
2016-02-25 18:48 ` [dpdk-dev] [PATCH 7/8] drivers/net/ixgbe: " Aaron Conole
2016-03-10 13:30 ` Panu Matilainen
2016-03-18 0:43 ` Zhang, Helin
2016-02-25 18:48 ` [dpdk-dev] [PATCH 8/8] drivers/net/ixgbe: Fix uninitialized warning Aaron Conole
2016-03-10 13:42 ` Panu Matilainen
2016-03-10 14:45 ` Remy Horton
2016-03-10 15:03 ` Panu Matilainen
2016-03-11 9:22 ` Remy Horton [this message]
2016-03-18 0:53 ` Zhang, Helin
2016-03-17 15:39 ` [dpdk-dev] [PATCH 0/8] Various fixes to compile with gcc6 Thomas Monjalon
2016-03-17 15:45 ` Thomas Monjalon
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