Re: [PATCH 0/1] MR9090: ntdll: Use Mach COW for write watches support on macOS.

[Tim Clem (＠tclem)]

Tim Clem (@tclem) commented about dlls/ntdll/unix/virtual.c:
> +        {
> +            ERR( "mach_vm_region failed: %d\n", kr );
> +            break;
> +        }
> +
> +        if (region_address > current_address) 
> +        {
> +            ERR( "trying to register unmapped region\n" );
> +            break;
> +        }
> +
> +        assert( info.protection == mach_prot );
> +
> +        region_size = (mach_vm_size_t)host_page_size;
> +        kr = mach_vm_protect( mach_task_self(), current_address, region_size, 0,
> +                              mach_prot | VM_PROT_COPY );
> Is there a reason to do this page by page? Can you not just do one mach_vm_protect for the whole range?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9090#note_117444