Message 226363 - Python tracker

➜

This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author	vstinner
Recipients	David.Edelsohn, serhiy.storchaka, vstinner
Date	2014-09-04.15:46:09
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1409845570.99.0.729089959618.issue22336@psf.upfronthosting.co.za>
In-reply-to

Content
The PyMem_Malloc(size) function has a well defined behaviour: if size is 0, a pointer different than NULL is returned. It looks like ckalloc(size) returns NULL if the size is NULL: see issue #21951 (bug on AIX). Moreover, memory allocated by ckalloc() is not traced by the new tracemalloc module! Attached patch replaces calls to ckalloc() and ckfree() with PyMem_Malloc() and PyMem_Free(). It may fix the issue #21951 on AIX. There is still a call to ckfree() in Tkapp_SplitList(). This memory block is allocated internally by Tcl, not directly by _tkinter.c.

The PyMem_Malloc(size) function has a well defined behaviour: if size is 0, a pointer different than NULL is returned. It looks like ckalloc(size) returns NULL if the size is NULL: see issue #21951 (bug on AIX).

Moreover, memory allocated by ckalloc() is not traced by the new tracemalloc module!

Attached patch replaces calls to ckalloc() and ckfree() with PyMem_Malloc() and PyMem_Free(). It may fix the issue #21951 on AIX.

There is still a call to ckfree() in Tkapp_SplitList(). This memory block is allocated internally by Tcl, not directly by _tkinter.c.

History
Date	User	Action	Args
2014-09-04 15:46:11	vstinner	set	recipients: + vstinner, serhiy.storchaka, David.Edelsohn
2014-09-04 15:46:10	vstinner	set	messageid: <1409845570.99.0.729089959618.issue22336@psf.upfronthosting.co.za>
2014-09-04 15:46:10	vstinner	link	issue22336 messages
2014-09-04 15:46:10	vstinner	create