Message 339079 - Python tracker

Message339079

Author	vstinner
Recipients	pitrou, vstinner
Date	2019-03-28.23:01:42
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1553814102.98.0.064217796616.issue36465@roundup.psfhosted.org>
In-reply-to

Content
When Python is built in debug mode, PyObject gets 2 new fields: _ob_prev and _ob_next. These fields change the offset of following fields in the PyObject structure and so breaks the ABI. I propose to modify the debug build (Py_DEBUG) to not imply Py_TRACE_REFS anymore. Antoine Pitrou proposed this idea when the C API was discussed to get a stable ABI. Another more radical idea is to completely remove Py_TRACE_REFS special build.

Content

When Python is built in debug mode, PyObject gets 2 new fields: _ob_prev and _ob_next. These fields change the offset of following fields in the PyObject structure and so breaks the ABI.

I propose to modify the debug build (Py_DEBUG) to not imply Py_TRACE_REFS anymore. Antoine Pitrou proposed this idea when the C API was discussed to get a stable ABI.

Another more radical idea is to completely remove Py_TRACE_REFS special build.

History
Date	User	Action	Args
2019-03-28 23:01:42	vstinner	set	recipients: + vstinner, pitrou
2019-03-28 23:01:42	vstinner	set	messageid: <1553814102.98.0.064217796616.issue36465@roundup.psfhosted.org>
2019-03-28 23:01:42	vstinner	link	issue36465 messages
2019-03-28 23:01:42	vstinner	create