[ksh93-integration-discuss] Re: [ast-users] ksh(88|93)/libast and memory alignment...

[Roland Mainz]

Glenn Fowler wrote:
> On Tue, 25 Jul 2006 05:25:28 +0200 Roland Mainz wrote:
> > I just found
> > http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6277643 which
> > is about the current Solaris /usr/bin/ksh (a ksh88 derivate).
> 
> > The description says this:
> > -- snip --
> > ksh fails to maintain 8-byte alignment in its "stak" allocator, but
> > allocates objects containing long long types from it.  This can cause
> > crashes and
> > violates the ABI.
> > -- snip --
> > I am not sure whether this applies to ksh93/libast or not... can anyone
> > who is familar with the libast memory allocator check that, please ?
> 
> the ksh88 derivative must have extended the code to typedef number as 'long long'
> and failed to add 'long long' to the stak alignment union _u_
> 
> ksh93 and -last (v)malloc align to ALIGN_BOUND in the generated src/lib/libast/align.h
> which uses the alignment of a struct that contains the largest int and float types
> among others -- 16 on sgi, 8 on sparc, 4, on i386

AFAIK 64bit sparc needs 16byte alignment, too... or not... Chris ?

----

Bye,
Roland

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