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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/58065] ARM MALLOC_ABI_ALIGNMENT is wrong
Date: Sat, 03 Aug 2013 22:46:00 -0000	[thread overview]
Message-ID: <bug-58065-4-p6wDJ9vJHN@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-58065-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58065

David Abdurachmanov <david.abdurachmanov at gmail dot com> changed:

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                 CC|                            |david.abdurachmanov at gmail dot c
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--- Comment #5 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
malloc() [glibc implementation] default alignment is sizeof(long double) or 2 *
sizeof(size_t) if I remember correctly, which is 8 bytes for ARMv7. I think,
based on C and C++ standard you have to make sure that alignment is good for
whatever primitive type, which means alignment size being the size of the
biggest primitive type (long double).

Reference bug ticket(9 years old):
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15795

Quote from C standard (identical or similar exist in C++):

The pointer returned if the allocation succeeds is suitably aligned so that
it may be assigned to a pointer to any type of object and then used to
access such an object or an array of such objects in the space allocated
(until the space is explicitly deallocated).


  parent reply	other threads:[~2013-08-03 22:46 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-02 22:35 [Bug target/58065] New: " bernd.edlinger at hotmail dot de
2013-08-02 22:36 ` [Bug target/58065] " bernd.edlinger at hotmail dot de
2013-08-02 22:38 ` bernd.edlinger at hotmail dot de
2013-08-02 22:39 ` bernd.edlinger at hotmail dot de
2013-08-02 22:43 ` bernd.edlinger at hotmail dot de
2013-08-03 22:46 ` david.abdurachmanov at gmail dot com [this message]
2013-08-05 20:38 ` ramana at gcc dot gnu.org
2013-08-07  7:37 ` bernd.edlinger at hotmail dot de
2013-09-05 12:28 ` clyon at gcc dot gnu.org

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