Hi Yicong,
On 28 May 2015 at 17:09, Yicong Huang <hengha....@gmail.com> wrote:
> To achieve this purpose, here are my plans:
> 1. Write a builtin RPython module 'criticalsection', because I thought only
> builtin RPython module could be used for existed builtin RPython module
> 2. For the list of builtin functions that we might block, add the code in
> the begining of those functions, e.g.
>
> def epoll:
> if criticalsection.isInCriticalSection() and
> criticalsection.block('select.epoll')
> return None
> ... the original code...
How about this pure Python solution, which would give the equivalent
level of security (i.e., okish against naive code, but no hard
security against a motivated attacker):
def just_returns_none(*args, **kwds):
return None
def enter_critical_section():
socket.epoll = just_returns_none
original_socket_epoll = socket.epoll
def leave_criticial_section():
socket.epoll = original_socket_epoll
A bientôt,
Armin.
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