[Python-Dev] PyEval_GetFrame() revisited
Fri, 14 Mar 2003 17:35:56 +0100
here has been this patch to the threadstate, which
allows to override the tstate's frame access.
I just saw the part of the patch that modifies
f = PyFrame_New(
! PyEval_GetGlobals(), /*globals*/
where the PyEval_GetGLobals is used instead of
Well, this unfortunately is not sufficient
for this module, since pyexpat still *has* direct
access to tstate->frame, in a much worse way:
pyexpat does read and write the frame variable!
In line 326, function call_with_frame, pyexpat
creates a new frame, assigns it to tstate->frame
and later on assigns f_f_back to it.
Reason why I'm thinking about this:
In order to simplify Stackless, I thought to remove
the frame variable, and let it be accessed always
via my current tasklet, which holds the frame.
Looking for the number of necessary patches, I stumbled
over PyExpat, and thought I should better keep my
hands off. Too bad.
Does it make sense to think about an API for
modifying the frame? Or are we at a dead end here?
cheers - chris
Christian Tismer :^) <mailto:email@example.com>
Mission Impossible 5oftware : Have a break! Take a ride on Python's
Johannes-Niemeyer-Weg 9a : *Starship* http://starship.python.net/
14109 Berlin : PGP key -> http://wwwkeys.pgp.net/
work +49 30 89 09 53 34 home +49 30 802 86 56 pager +49 173 24 18 776
PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04
whom do you want to sponsor today? http://www.stackless.com/