On Tue, Jun 21, 2016 at 6:06 AM, Florian Weimer <fweimer@redhat.com> wrote:
On 06/21/2016 03:00 PM, H.J. Lu wrote:
MALLOC_ALIGNMENT is potentially larger. malloc/tst-malloc-thread-fail
tests
for alignment. To my knowledge, it passes on all regularly tested
architectures after commit dea39b13e2958a7f0e75b5594a06d97d61cc439f.
MALLOC_ALIGNMENT is kind of mapped to the malloc alignment of
a psABI. Shouldn't ld.so malloc have the same alignment of libc malloc?
I don't see why. MALLOC_ALIGNMENT has to match both the ABI constraint and
the malloc/malloc.c implementation constraint (which requires a minimum
alignment of 2 * sizeof (size_t)).
My understanding is since the minimum constraint of malloc alignment
<= ABI alignment, MALLOC_ALIGNMENT == ABI alignment. Do you
have a glibc platform where it isn't true?