From: | Andres Freund <andres(at)anarazel(dot)de> |
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To: | pgsql-hackers(at)postgresql(dot)org |
Cc: | Peter Geoghegan <peter(at)2ndquadrant(dot)com>, "Soules, Craig" <craig(dot)soules(at)hp(dot)com> |
Subject: | Re: Issues with C++ exception handling in an FDW |
Date: | 2012-01-31 19:01:05 |
Message-ID: | 201201312001.06000.andres@anarazel.de |
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Lists: | pgsql-hackers |
On Tuesday, January 31, 2012 07:52:52 PM Peter Geoghegan wrote:
> On 30 January 2012 23:04, Soules, Craig <craig(dot)soules(at)hp(dot)com> wrote:
> > When there are no errors everything works flawlessly, however, we noticed
> > that even throwing an exception in the C++ layer was causing an
> > immediate segmentation fault. Even when encapsulated in a try { }
> > catch(...) { } block.
> >
> > If anyone has seen anything like this, any pointers or suggestions would
> > be much appreciated. I have followed all of the recommendations in the
> > PostgreSQL documentation, with no luck. I am not overloading the
> > _init() functions in either shared library (another potential source of
> > errors I have read about).
>
> I suggest that you generalise from the example of PLV8. The basic
> problem is that the effect of longjmp()ing over an area of the stack
> with a C++ non-POD type is undefined. I don't think you can even use
> structs, as they have implicit destructors in C++.
The PODness of a struct depends on its contents.
Andres
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