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Re: Memory corruption on amd64 FreeBSD

From: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
To: Tobias Schl?ter <tobias dot schlueter at physik dot uni-muenchen dot de>
Cc: fortran at gcc dot gnu dot org
Date: Wed, 1 Sep 2004 13:48:50 -0700
Subject: Re: Memory corruption on amd64 FreeBSD
References: <20040901003759.GA2421@troutmask.apl.washington.edu> <41361B16.1060805@physik.uni-muenchen.de>

On Wed, Sep 01, 2004 at 08:55:18PM +0200, Tobias Schl?ter wrote:
> 
> Actually, m->marker doesn't seem to be used anywhere, but I might have missed
> something. You could try the appended patch to see if some memory is freed
> twice. (This patch catches the case where the magic number is not overwritten,
> but other memory in the structure is overwritten, after it has been freed.)
> This would be a compiler error then, because this gfc_internal_free only deals
> with temporaries.
> 
> Also, an out-of-bounds array access could be the problem here.
> 

I tried your patch.  It had no effect.  The segfault still occurs.

-- 
Steve

References:
- Memory corruption on amd64 FreeBSD
  - From: Steve Kargl
- Re: Memory corruption on amd64 FreeBSD
  - From: Tobias Schlüter

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