[Zope-dev] Re: [ZODB-Dev] Re: BTrees strangeness (was Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

[Tres Seaver]

Casey Duncan wrote:
> On Mon, 17 May 2004 19:00:16 +0200
> Dieter Maurer <dieter at handshake.de> wrote:
> 
> 
>>Chris McDonough wrote at 2004-5-15 13:04 -0400:
>>
>>>...
>>>Dieter, do you think you can read this patch and give a thumbs up or
>>>down on it?
>>
>>The patch looks good.
>>
>>
>>>On a different subject, the publisher probably shouldn't pass around
>>>traceback objects (e.g. when it calls into err_hook) as Tres believes
>>>that may be a memory leak waiting to happen.
>>
>>The traceback is vital for error analysis.
>>
>>It may not be necessary that ZPublisher touches the traceback
>>but we will definitely need access to it during error handling.

Because the traceback contains stack frames, passing it through another 
stack frame (via a function call) is inherently tricky:  the called 
function must *not* raise another exception.

> Perhaps the traceback can be passed as a string to avoid leaks?
> Furthermore why can't the traceback be retrieved later from
> sys.exc_info()?

+1;  I don't want untrusted code handling tracebacks anyway.

Tres.
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Tres Seaver                                tseaver at zope.com
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