Message-ID: <3915881A.13BE1702@softhome.net>
Date: Sun, 07 May 2000 18:13:30 +0300
From: Laurynas Biveinis <lauras AT softhome DOT net>
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To: "Mark E." <snowball3 AT bigfoot DOT com>
CC: DJGPP Workers <djgpp-workers AT delorie DOT com>
Subject: Re: Perfomance of gc-simple
References: <3913BE88 DOT 44A89056 AT softhome DOT net> <39155472 DOT 28917 DOT 25EC84 AT localhost>
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Reply-To: djgpp-workers AT delorie DOT com

"Mark E." wrote:
> 
>   /* Now align the pointer.  */
>   aligned_ptr = (char *)((unsigned long)(unaligned_ptr + page_size) & ~(page_size -
> 1));
> 
>   /* Record location to pass to free() in unused allocated space.  */
>   *((char **)(aligned_ptr - ptr_size)) = unaligned_ptr;

Could it be that unused allocated space is too small to hold a pointer and it will be
corrupted?

Right now I'm playing with other (but similar) fix to ggc-page - allocating 
pointer with malloc, aligning it, and remembering two pointers - one for users, 
other for free().

Laurynas Biveinis