PATCH: Malloc fails if MALLOC_ALIGNMENT > 2 * SIZE_SZ

H.J. Lu hjl.tools@gmail.com
Fri Aug 19 22:51:00 GMT 2011


On Fri, Aug 19, 2011 at 3:44 PM, Roland McGrath <roland@hack.frob.com> wrote:
> Can one of you explain how this avoids the problem mentioned in the removed
> comment, of malloc_get_state/malloc_set_state incompatibility on powerpc32?
>
> I think the main use case for this is an Emacs that was built (and dumped)
> using an older libc, and then run with a newer libc.  Is it verified that
> an existing powerpc32 Emacs binary is not broken by running against a libc
> with this change?
>

I can't comment on powerpc32.  Bit a target shouldn't define

MALLOC_ALIGNMENT > 2 * SIZE_SZ

if it will break binary compatibility.


-- 
H.J.



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