Message 62453 - Python tracker

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Author	arigo
Recipients	arigo, theller
Date	2008-02-16.08:52:10
SpamBayes Score	0.024465797
Marked as misclassified	No
Message-id	<1203151931.9.0.660514503135.issue2123@psf.upfronthosting.co.za>
In-reply-to

Content
We're finding such bugs because we are trying to reimplement ctypes in PyPy. I guess your last question was "is it impossible to construct this 'bug' without reading .contents?". The answer is that it doesn't change much; you can replace all the reads from .contents with reads from [0], and still see the issue. See attached y.py, where I've put the equivalent C code in comments.

We're finding such bugs because we are trying to reimplement ctypes in PyPy.

I guess your last question was "is it impossible to construct this 'bug'
without *reading* .contents?".  The answer is that it doesn't change
much; you can replace all the reads from .contents with reads from [0],
and still see the issue.  See attached y.py, where I've put the
equivalent C code in comments.

History
Date	User	Action	Args
2008-02-16 08:52:12	arigo	set	spambayes_score: 0.0244658 -> 0.024465797 recipients: + arigo, theller
2008-02-16 08:52:11	arigo	set	spambayes_score: 0.0244658 -> 0.0244658 messageid: <1203151931.9.0.660514503135.issue2123@psf.upfronthosting.co.za>
2008-02-16 08:52:11	arigo	link	issue2123 messages
2008-02-16 08:52:10	arigo	create