On 3 Aug 2021, at 19:19, Konstantin Belousov <k...@freebsd.org> wrote: > > The branch main has been updated by kib: > > URL: > https://cgit.FreeBSD.org/src/commit/?id=49ad342cc10cba14b3a40ba26cf8bb2150e2925a > > commit 49ad342cc10cba14b3a40ba26cf8bb2150e2925a > Author: Konstantin Belousov <k...@freebsd.org> > AuthorDate: 2021-08-02 09:50:32 +0000 > Commit: Konstantin Belousov <k...@freebsd.org> > CommitDate: 2021-08-03 18:19:32 +0000 > > Add _Fork() > > Current POSIX standard requires fork() to be async-signal safe. Neither > our implementation, nor implementations in other operating systems are, > and practically it is impossible to make fork() async-signal safe without > too much efforts. Also, that would put undue requirement that all atfork > handlers should be async-signal safe as well, which contradicts its main > use. > > As result, Austin Group dropped the requirement, and added a new function > _Fork() that should be async-signal safe, but it does not call atfork > handlers. Basically, _Fork() can be implemented as a raw syscall. > > Release of glibc 2.34 added _Fork(), do the same for FreeBSD. > Clarify threading behavior for fork() in the manpage. > > Reviewed by: markj > Sponsored by: The FreeBSD Foundation > MFC after: 2 weeks > Differential revision: https://reviews.freebsd.org/D31378
This breaks the build on case-insensitive filesystems like macOS has, since _Fork.o for this C file and _fork.o for __sys_fork and _fork conflict, leading to either build failures (because _fork.o gets replaced and __sys_fork is undefined) or silently not including _Fork (because _Fork.o gets replaced) in the library, with it being non-deterministic based on whichever order the files happen to be built in, and potentially varying between the three different libraries as the .o, .pico and .nossppico files are independent. Jess _______________________________________________ dev-commits-src-main@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/dev-commits-src-main To unsubscribe, send any mail to "dev-commits-src-main-unsubscr...@freebsd.org"
