bug 14365: do not touch high address space (initial stack, user_space_limit)

[Vitaliy Margolen]

John Reiser wrote:
> Attached is the patch for http://bugs.winehq.org/show_bug.cgi?id=14365
> do not touch high address space (initial stack, user_space_limit)
So what's wrong with what Wine doing now? The part you removed states what 
it's there for - to prevent needless allocation attempts at the end of the 
address space.

> 
> -- John Reiser, jreiser at BitWagon.com
> 
> --- wine-1.0/libs/wine/mmap.c	2008-06-17 07:07:31.000000000 -0700
> +++ po49996-2008-06-30/wine-1.0/libs/wine/mmap.c	2008-06-30 17:18:29.000000000 -0700
> @@ -233,7 +233,9 @@
>      return try_mmap_fixed( addr, size, PROT_NONE, flags, get_fdzero(), 0 );
>  #endif
>      ptr = mmap( addr, size, PROT_NONE, flags, get_fdzero(), 0 );
> -    if (ptr != addr && ptr != (void *)-1)  munmap( ptr, size );
> +    if (ptr != addr && ptr != (void *)-1) {
> +         munmap( ptr, size );
> +    }
>      return (ptr == addr);
>  }
What's the point of this change?


>  
> @@ -321,8 +323,8 @@
>      struct reserved_area *area;
>      struct list *ptr;
>  #if defined(__i386__) && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)  /* commented out until FreeBSD gets fixed */
> -    char stack;
> -    char * const stack_ptr = &stack;
> +    //char stack;
> +    //char * const stack_ptr = &stack - (10*1024*1024);  // 10M stack expansion
>      char *user_space_limit = (char *)0x7ffe0000;
No C++ comments please. If you removing something - remove it don't comment it.

Vitaliy.