glibc/sysdeps/unix
Adhemerval Zanella Netto 2053c11331 linux: Add clone3 CLONE_CLEAR_SIGHAND optimization to posix_spawn
The clone3 flag resets all signal handlers of the child not set to
SIG_IGN to SIG_DFL.  It allows to skip most of the sigaction calls
to setup child signal handling, where previously a posix_spawn
had to issue 2 times NSIG sigaction calls (one to obtain the current
disposition and another to set either SIG_DFL or SIG_IGN).

With POSIX_SPAWN_SETSIGDEF the child will setup the signal for the case
where the disposition is SIG_IGN.

The code must handle the fallback where clone3 is not available. This is
done by splitting __clone_internal_fallback from __clone_internal.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-02-01 08:42:11 -03:00
..
alpha Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
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i386 Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
inet
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powerpc Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
sh Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
sysv/linux linux: Add clone3 CLONE_CLEAR_SIGHAND optimization to posix_spawn 2023-02-01 08:42:11 -03:00
x86_64 Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
Implies
Makefile Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
confstr.h
get_child_max.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
getlogin.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
getlogin_r.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
getpagesize.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
grantpt.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
ifreq.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
make-syscalls.sh
setxid.h
sockatmark.c Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
syscall-template.S Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
syscall.S Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00
syscalls.list misc: Add time64 alias for ioctl 2021-07-21 11:58:09 +02:00
sysdep.h Update copyright dates with scripts/update-copyrights 2023-01-06 21:14:39 +00:00