Re: libgcc double-free, backend won't die

Alvaro Herrera wrote:
> Craig James wrote:
>> Alvaro Herrera wrote:
>>> Craig James wrote:
>>>
>>>> Here is my guess -- and this is just a guess.  My functions use a
>>>> third-party library which, of necessity, uses malloc/free in the
>>>> ordinary way.  I suspect that there's a bug in the Postgres palloc()
>>>> code that's walking over memory that regular malloc() allocates.  The
>>>> third-party library (OpenBabel) has been tested pretty thoroughly by
>>>> me an others and has no memory corruption problems.  All malloc's are
>>>> freed properly.  Does that seem like a possibility?
>>> Not really.  palloc uses malloc underneath.
>> But some Postgres code could be walking off the end of a malloc'ed
>> block, even if palloc() is allocating and deallocating correctly.
>> Which is why I was hoping to use valgrind to see what's going on.
>
> I very much doubt it.  Since you've now shown that OpenBabel is
> multithreaded, then that's a much more likely cause.

Can you elaborate?  Are multithreaded libraries not allowed to be linked to Postgres?

Thanks,
Craig