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Re: __memcpy_sse2_unaligned on non-8-byte aligned pointer
- From: OndÅej BÃlka <neleai at seznam dot cz>
- To: Stephan Bergmann <sbergman at redhat dot com>
- Cc: libc-help at sourceware dot org
- Date: Thu, 9 Jul 2015 11:06:35 +0200
- Subject: Re: __memcpy_sse2_unaligned on non-8-byte aligned pointer
- Authentication-results: sourceware.org; auth=none
- References: <559A7308 dot 4040007 at redhat dot com> <20150709073837 dot GA22236 at domone> <559E281A dot 6040907 at redhat dot com>
On Thu, Jul 09, 2015 at 09:51:54AM +0200, Stephan Bergmann wrote:
> On 07/09/2015 09:38 AM, OndÅej BÃlka wrote:
> >Could you check with valgrind first? This is probably just a invalid src
> >pointer. Basically all string functions use these loads
> >so alignment checking so it would be bigger problem.
>
> I cannot reproduce that problem myself. All I've got is that
> third-party crash report, from which I'm trying to draw conclusions.
Then ask to reproducible example with valgrind, I am 99.9% sure that it
will find problem. If alignment checking caused that then it needed to
be enabled shortly before crash as 40% of calls are unaligned.