[gambit-list] Problem with FFI & Memory Corruption

Álvaro Castro-Castilla alvaro.castro.castilla at gmail.com
Sun Feb 12 08:43:49 EST 2012


Hi Taylor,

Do you plan on making full bindings for libxml2? I'd be interested in
packaging it as a Blackhole module when you are ready.
Also, when following your steps I got this error:
> (load "xml")
*** WARNING -- Could not find C function: "____20_xml_2e_o1"
*** ERROR IN (console)@1.1 -- /home/alvatar/gambit-xml/xml.o1: undefined
symbol: ___release_scmobj

Using gambit 4.6.3

Best regards,

Álvaro





On Fri, Feb 10, 2012 at 8:09 PM, Marc Feeley <feeley at iro.umontreal.ca>wrote:

>
> On 2012-02-10, at 2:01 PM, Taylor Venable wrote:
>
> > Thanks to Valgrind, I found my mistake. I made a vector with size two,
> then put three items into it. Specifically, the root node went into index
> 2, which is why that field of the xml-document was the one with the bug.
> That silly problem fixed, things seem to be working fine. But if anybody
> has a spare minute and would be willing to check over my code, I would
> still appreciate any feedback about whether I'm doing things the right way.
> Especially when it comes to memory management. Thanks!
>
> I'm glad you found the bug.  I looked at your code yesterday and all the
> allocations seem correct (use of ___STILL objects, and appropriate
> reference count management).  It seems I missed the "out of bound" index
> which was the problem.
>
> Marc
>
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