[Python-Dev] Some news from my sandbox project
victor.stinner at haypocalc.com
Sun Sep 19 12:19:44 CEST 2010
Le dimanche 19 septembre 2010 01:05:45, Greg Ewing a écrit :
> I don't follow. Trusted functions such as proxy() shouldn't
> be sharing a __builtins__ dict with sandboxed code.
> So give each program its own copy of __builtins__.
By "program" you mean a "process"? proxy() and untrusted functions are
executed in the same process and the same interpreter. Untrusted code calls
(indrectly) proxy(): should I create a new copy of __builtins__ for each
frame? I don't know how to do that in Python (without modify the Python
interpreter) and I suppose that it will make Python slower. The frame
mechanism is already slow (create a new frame to call a Python function is
much slower than calling a function in C).
pysandbox creates a new separated namespace for untrusted functions, but
__builtins__ "namespace" (dict) is shared between Python and pysandbox
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