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6f9d4f595e
glibc/sysdeps/posix
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Torvald Riegel 6f9d4f595e Fix incorrect double-checked locking related to _res_hconf.initialized. 
_res_hconf.initialized was not suitable for use in a multi-threaded
environment due to the lack of atomics and memory barriers.  Use of it was
also unnecessary because _res_hconf_init did the right thing by using
__libc_once.  This patch fixes the glibc-internal uses by just calling
_res_hconf_init unconditionally, and switches to a release MO atomic store
for _res_hconf.initialized to fix the glibc side of the synchronization
problem (which will maintain backward compatibility, but cannot fix the
lack of acquire MO on any glibc-external loads).

	[BZ #20477]
	* resolv/res_hconf.c (do_init): Use atomic access.
	* resolv/res_hconf.h: Add comments.
	* nscd/aicache.c (addhstaiX): Call _res_hconf_init unconditionally.
	* nss/getXXbyYY_r.c (REENTRANT_NAME): Likewise.
	* sysdeps/posix/getaddrinfo.c (gaih_inet): Likewise.
2016-08-18 20:53:37 +02:00
..
alarm.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
clock_getres.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
clock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
closedir.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ctermid.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
cuserid.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dirfd.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dirstream.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dl-fileid.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dup2.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dup.c posix: New Linux posix_spawn{p} implementation 2016-03-07 11:53:47 +07:00
euidaccess.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fdopendir.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
flock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fpathconf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
gai_strerror-strs.h * sysdeps/posix/gai_strerror.c: Complete rewrite. Avoid relocations. 2005-12-20 17:53:00 +00:00
gai_strerror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
getaddrinfo.c Fix incorrect double-checked locking related to _res_hconf.initialized. 2016-08-18 20:53:37 +02:00
getcwd.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
getdtsz.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
gethostname.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
getpagesize.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
gettimeofday.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isatty.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
isfdtype.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
killpg.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
libc_fatal.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Makefile NPTL: Refactor named semaphore code to use shm-directory.h 2014-12-12 15:01:30 -08:00
mkfifo.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
mkfifoat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
nice.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
open64.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
opendir.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pathconf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pause.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
posix_fallocate64.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
posix_fallocate.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pread64.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pread.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
preadv64.c * misc/Makefile (routines): Add preadv, preadv64, pwritev, pwritev64. 2009-04-03 19:57:16 +00:00
preadv.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
profil.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pwrite64.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pwrite.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pwritev64.c * misc/Makefile (routines): Add preadv, preadv64, pwritev, pwritev64. 2009-04-03 19:57:16 +00:00
pwritev.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
raise.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
readdir_r.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
readdir.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
readv.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
remove.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
rename.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
rewinddir.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
seekdir.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
shm_open.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
shm_unlink.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
shm-directory.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
shm-directory.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigblock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigignore.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigintr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
signal.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigpause.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigset.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigsetmask.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigsuspend.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigwait.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sleep.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
spawni.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sprofil.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Subdirs Make sysdeps/posix bring in login subdir. 2015-07-23 17:04:22 -07:00
sysconf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
system.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sysv_signal.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
telldir.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tempname.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
time.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
timespec_get.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
truncate.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ttyname_r.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ttyname.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ulimit.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
usleep.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
utime.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
utimes.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
wait3.c Remove union wait [BZ #19613] 2016-04-14 08:54:57 +02:00
wait.c Remove union wait [BZ #19613] 2016-04-14 08:54:57 +02:00
waitid.c Fix flag test in waitid compatibility layer 2016-03-13 21:44:09 +01:00
writev.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00