Message 416901 - Python tracker

Message416901

Author	socketpair
Recipients	Yonatan Goldschmidt, gregory.p.smith, izbyshev, koobs, pablogsal, ronaldoussoren, socketpair
Date	2022-04-06.21:16:41
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1649279801.15.0.388971157914.issue35823@roundup.psfhosted.org>
In-reply-to

Content
See #47245. https://github.com/bminor/glibc/blob/master/sysdeps/unix/sysv/linux/spawni.c#L309 In short - do not use vfork(). Use clone(CLONE_VM \| CLONE_VFORK). And build separate stack. Current implementation is heavily broken. Another guy has failed: https://bugzilla.kernel.org/show_bug.cgi?id=215813. Please comment calling vfork() as soon as possible in order to fallback to fork() implementation. Until you (or me?) write good vfork children code.

Content

See #47245.

https://github.com/bminor/glibc/blob/master/sysdeps/unix/sysv/linux/spawni.c#L309

In short - do not use vfork(). Use clone(CLONE_VM | CLONE_VFORK). And build separate stack.

Current implementation is heavily broken.

Another guy has failed: https://bugzilla.kernel.org/show_bug.cgi?id=215813.


Please comment calling vfork() as soon as possible in order to fallback to fork() implementation. Until you (or me?) write good vfork children code.

History
Date	User	Action	Args
2022-04-06 21:16:41	socketpair	set	recipients: + socketpair, gregory.p.smith, ronaldoussoren, koobs, izbyshev, pablogsal, Yonatan Goldschmidt
2022-04-06 21:16:41	socketpair	set	messageid: <1649279801.15.0.388971157914.issue35823@roundup.psfhosted.org>
2022-04-06 21:16:41	socketpair	link	issue35823 messages
2022-04-06 21:16:41	socketpair	create