Message 282384 - Python tracker

Message282384

Author	serhiy.storchaka
Recipients	serhiy.storchaka, vstinner
Date	2016-12-05.05:52:57
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1480917178.12.0.704656166919.issue28870@psf.upfronthosting.co.za>
In-reply-to

Content
> What do you think of using alloca() instead of an "PyObject *small_stack[5];" which has a fixed size? alloca() is not in POSIX.1. I afraid it would make CPython less portable. > Note: About your patch, try to avoid _PyObject_CallArg1() if you care of the usage of the C stack, see issue #28858. I don't understand how can I avoid it. > How do you check the stack consumption of PyObject_CallFunctionObjArgs()? Using a script from issue28858.

Content

> What do you think of using alloca() instead of an "PyObject *small_stack[5];" which has a fixed size?

alloca() is not in POSIX.1. I afraid it would make CPython less portable.

> Note: About your patch, try to avoid _PyObject_CallArg1() if you care of the usage of the C stack, see issue #28858.

I don't understand how can I avoid it.

> How do you check the stack consumption of PyObject_CallFunctionObjArgs()?

Using a script from issue28858.

History
Date	User	Action	Args
2016-12-05 05:52:58	serhiy.storchaka	set	recipients: + serhiy.storchaka, vstinner
2016-12-05 05:52:58	serhiy.storchaka	set	messageid: <1480917178.12.0.704656166919.issue28870@psf.upfronthosting.co.za>
2016-12-05 05:52:58	serhiy.storchaka	link	issue28870 messages
2016-12-05 05:52:57	serhiy.storchaka	create