MESSAGE
| DATE | 2004-09-04 |
| FROM | Ruben Safir Secretary NYLXS
|
| SUBJECT | Re: [hangout] Re: Advocacy vs. Zealotry vs. Who Cares?!?
|
> > Actually it is. Even Visual Basic applications which leverage heavely
> > the MSFT installs new DLL's and replaces old ones willie nillie.
>
> Yeah, people get away with murder writing apps on Windows.
> There are so many bad Windows programmers.
>
> This isn't a fundamental weakness of Windows, is it?
Yes - IT IS.
The Kernel in Free Software has protections built into it to
prevent the loading and execution of a wide variety of
problems. It will flat out restrict access of users to a large
number of network and memory resources. You actually have
to use a programming exploit, or a bug. With MS products,
you can just exploit the functionality intentionally built into
the OS and the applications.
>
> > and XP. All processes are considered threads by the operating system. This
> > makes the process context slightly lighter than the traditional
> > heavyweight process model used in UNIX-like operating systems. As a
> > consequence of this everything-is-a-thread model, however, everything
> > sits in global memory address space. With the correct permissions and
> > the correct address, one program could twiddle another program's bits.
>
> This is total nonsense! Who wrote this?
>
Someone named Beagel, I believe...
> > Another consequence of this is data structures created by the kernel don't
> > sit at any fixed address. This means it is up to the user program to lock
> > down the associated memory before using any global data structures, such
> > as graphic contexts. You also must remember to unlock these structures
> > once you are done with them, or they may help cause memory fragmentation.
>
> This is fine. The alternative is memory fragmentation, as he said. I
> don't think Linux is any different in this regard. In fact, I can't
> think of an instance where you even GET ACCESS to any kernel structures
> in Linux.
Right - because these memory blocks on in users space limited in access to
processes, or you get a segmentation fault.
> So this is really not an apples-to-apples comparison.
Apple - we're not getting into Apple as well :-|
Ruben
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