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Re: 32-bit glibc bug with SSIZE_MAX
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From: |
Eric Blake |
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Subject: |
Re: 32-bit glibc bug with SSIZE_MAX |
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Date: |
Wed, 13 Jul 2016 07:38:14 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 07/13/2016 06:12 AM, Eric Blake wrote:
>> +The macro @code{SSIZE_MAX} has the wrong type,
>> +albeit with the correct value:
>> +glibc 2.24.
>> address@hidden
>
> Only 32-bit glibc is buggy; 64-bit glibc is okay.
Worse, it's platform-dependent. On 32-bit s390, SSIZE_MAX is the correct
type, but SIZE_MAX is broken (unsigned int, even though size_t is
unsigned long).
>
> I suppose we should do a similar patch for 64-bit OSX, which has
> <stdint.h> declaring SIZE_MAX with the wrong type (unsigned long long,
> while size_t is merely unsigned long). But at least there, we already
> have a replacement stdint.h.
>
I'll push a followup doc patch later today to cover the additional
corner cases.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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