Re: Issues with C++ exception handling in an FDW

On Tuesday, January 31, 2012 07:52:52 PM Peter Geoghegan wrote:
> On 30 January 2012 23:04, Soules, Craig <craig.soules@hp.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