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Re: [Qemu-arm] [Qemu-devel] [PATCH] arm_gicv3: Add assert()s to tell Cov

From: Peter Maydell
Subject: Re: [Qemu-arm] [Qemu-devel] [PATCH] arm_gicv3: Add assert()s to tell Coverity that offsets are aligned
Date: Tue, 12 Jul 2016 08:55:00 +0100

On 12 July 2016 at 02:33, Shannon Zhao <address@hidden> wrote:
> On 2016/7/12 2:22, Peter Maydell wrote:
>> Coverity complains that the GICR_IPRIORITYR case in gicv3_readl()
>> can overflow an array, because it doesn't know that the offsets
>> passed to that function must be word aligned. Add some assert()s
>> which hopefully tell Coverity that this isn't possible.
>> Signed-off-by: Peter Maydell <address@hidden>
>> ---
>> I don't have any way to test this except getting it into master
>> and seeing if Coverity still complains, but if it does then
>> I'll happily just mark the error as a false positive...
> Since the codes are correct, maybe it could ignore the original complain
> at Coverity instead of adding the assert(). But anyway I'm fine with
> this patch.

Yeah, I was on the fence about just ignoring it. But
it's not really feasible for an analysis tool to
deduce that the unaligned case can't happen, so
a little assistance seemed in order.

-- PMM

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