[Cin] unaligned load in bctheme

[Andrew Randrianasulu]

вс, 4 дек. 2022 г., 17:51 Phyllis Smith <phylsmith2017 at gmail.com>:

>
> On 4 different systems I was only able to include in guicast/Makefile, the
>>> CFLAGS += $(-fsanitize=alignment) and set the LDFLAGS environment variable
>>> to -fsanitize=alignment in order to compile.  But when I ran bin/cin I
>>> never got any errors of the type "bctheme.C:458:15: runtime error: load of
>>> misaligned address".  This was Fedora 32, Ubuntu 16, Debian 32-bit 9.1, and
>>> Debian 11.0.  I only loaded a file, played a little of it, and added a
>>> plugin as a test (maybe there was something in particular I should have
>>> tried?)
>>>
>>
>>
>> no, it was right on startup on Slackware 15.0 (mostly) 32-bit over 64-bit
>> kernel....
>>
>> I'll try on ppc32 machine hopefully soon (ppc/sparc/alpha said to be much
>> more sensitive to such errors)
>>
>> That was Debian 11.0 32-bit that I tested it on, not 64 bit.
> If the patch fixes it for Slackware 15.0 and since it does not seem to add
> any problems for other distros, we can check it into GIT.
>


may be it only fires when I run 32-bit cingg over 64 bit kernel? Sorry I
still not performed any experimentation due to some coughing type of health
problems

  I just do not understand the patch at all because I don't know C code and
> can not tell if the code is better with essentially the same outcome.
>


Explanation I found on the web says it fixes it because memcpy from libc
and thus know how and where align things

https://hackaday.com/2022/05/10/data-alignment-across-architectures-the-good-the-bad-and-the-ugly/



>
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