[Python-Dev] Discussion related to memory leaks requested (original) (raw)

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: PyInitialize(); ... run empty python source file ... PyFinalize();

I've identified several suspect areas including dictionary maitenace in import.c:~ 414 /* Clear the modules dict. */ PyDictClear(modules); /* Restore the original builtins dict, to ensure that any user data gets cleared. */ dict = PyDictCopy(interp->builtins); if (dict == NULL) PyErrClear(); PyDictClear(interp->builtins); if (PyDictUpdate(interp->builtins, interp->builtinscopy)) PyErrClear(); PyXDECREF(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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