Battle of the garbage collectors, or ARGGHHHHHH!!!!

Cem Karan cfkaran2 at
Mon Apr 24 20:53:12 EDT 2017

On Apr 24, 2017, at 6:59 PM, Terry Reedy <tjreedy at> wrote:

> On 4/24/2017 6:24 PM, CFK wrote:
>> TLDR version: the bdwgc garbage collector ( and
>> python's collector are not playing nice with one another, and I need to
>> make them work with each other.
>> Long version: I'm trying to write bindings for python via ctypes to control
>> a library written in C that uses the bdwgc garbage collector (
>>  The bindings mostly work, except for when
>> either bdwgc or python's garbage collector decide to get into an argument
>> over what is garbage and what isn't, in which case I get a segfault because
>> one or the other collector has already reaped the memory.  I need the two
>> sides to play nice with one another.  I can think of two solutions:
>> First, I can replace Python's garbage collector via the functions described
>> at
>> so that they use the bdwgc functions instead.  However, this leads me to a
>> whole series of questions:
>>    1. Has anyone done anything like this before?
> I know that experiments have been done.
> Have you tried searching 'Python bdwgc garbage collection' or similar?

I did google around a bit, but the results I found weren't relevant.  I was hoping someone else on the list had tried, and simply hadn't gotten around to posting about it anywhere yet.

Cem Karan

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