[Python-Dev] Discussion related to memory leaks requested
Benjamin Peterson
benjamin at python.org
Thu Jan 14 00:42:24 EST 2016
This is a "well-known" issue. Parts of the interpreter (and especially,
extension modules) cheerfully stash objects in global variables with no
way to clean them up. Fixing this is a large project, which probably
involves implementing PEP 489.
On Wed, Jan 13, 2016, at 11:32, Matthew Paulson wrote:
> Hi:
>
> I've spent some time performing memory leak analysis while using Python
> in an embedded configuration.
>
> The pattern is:
>
> Py_Initialize();
>
> ... run empty python source file ...
>
> Py_Finalize();
>
>
> I've identified several suspect areas including dictionary maitenace in
> import.c:~ 414
>
> /* Clear the modules dict. */
> PyDict_Clear(modules);
> /* Restore the original builtins dict, to ensure that any
> user data gets cleared. */
> dict = PyDict_Copy(interp->builtins);
> if (dict == NULL)
> PyErr_Clear();
> PyDict_Clear(interp->builtins);
> if (PyDict_Update(interp->builtins, interp->builtins_copy))
> PyErr_Clear();
> Py_XDECREF(dict);
> /* Clear module dict copies stored in the interpreter state */
>
>
> Is there someone in the group that would like to discuss this topic.
> There seems to be other leaks as well. I'm new to Python-dev, but
> willing to help or work with someone who is more familiar with these
> areas than I.
>
> Thanks,
>
> Matt
>
>
> --
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