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

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.

--
Alvaro Herrera http://www.amazon.com/gp/registry/5ZYLFMCVHXC
"When the proper man does nothing (wu-wei),
his thought is felt ten thousand miles." (Lao Tse)