[Python-Dev] Proposal to drop f_tstate (original) (raw)

Christian Tismer tismer@tismer.com
Thu, 12 Jun 2003 19:35:44 +0200

Guido van Rossum wrote:

Therefore, I hereby propose to remove this frame field, in order to save space. ...

I notice that all the places that use ftstate are functions that get a frame passed in. What makes you believe that those always run in the same thread where the frame was created? Schluck! I assumed that ftstate was just some cache, and one would never try to look into a different thread. This was a wrong assumption. I don't know that it is. I just don't know that it isn't, either.

It is in fact possible to call PyTraceBack_Here with any frame, and this could theoretically be from a different thread.

So I'd better not touch anything. No big deal.

Sorry, I will und my changes, ASAP.

Where did you make any changes?

Oh, just in my Stackless trunk. I reverted my stuff to the last version.

thanks & cheers - chris

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