David Fries writes:
> The structure is only made up of an 8 bit type "char", and it is
> aligned to a multiple of the struct rgb data size which is 3. How is
> that unaligned?
Sorry, I've miscomputed the alignment.
Andreas.
--
Andreas Schwab, sch...@linux-m68k.org
GPG Key fingerprint = 58CA
On Sat, Feb 22, 2014 at 08:49:38AM +0100, Andreas Schwab wrote:
> David Fries writes:
>
> > The attached program sets up and reads through the array with extra
> > padding at the of the array from 8 bytes to 0 bytes. Padding from 4
> > to 0 crashes.
>
> This program has undefined behaviour beca
> Before I file a bug report I wanted to check to see if my expectations
> are wrong or if this is a compiler bug. Is there anything that allows
> the compiler to generate instructions that would read beyond the end
> of an array potentially causing a crash if the page isn't accessible?
It's PR m
David Fries writes:
> The attached program sets up and reads through the array with extra
> padding at the of the array from 8 bytes to 0 bytes. Padding from 4
> to 0 crashes.
This program has undefined behaviour because you are using unaligned
pointers.
Andreas.
--
Andreas Schwab, sch...@li
I was using valgrind and found an out of bounds error reading 8
bytes off an array of 3 byte data structures where the extra 5 bytes
being read were out of the array bounds. I attached a program that
ends the array at the end of a page so reading beyond the end of the
array would cause a crash, an
