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
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aicache.c	Fix incorrect double-checked locking related to _res_hconf.initialized.	2016-08-18 20:53:37 +02:00
cache.c
connections.c
dbg_log.c
dbg_log.h
Depend
gai.c
getgrgid_r.c
getgrnam_r.c
gethstbyad_r.c
gethstbynm3_r.c
getpwnam_r.c
getpwuid_r.c
getsrvbynm_r.c
getsrvbypt_r.c
grpcache.c
hstcache.c
initgrcache.c
Makefile
mem.c
netgroupcache.c
nscd_conf.c
nscd_getai.c
nscd_getgr_r.c
nscd_gethst_r.c
nscd_getpw_r.c
nscd_getserv_r.c
nscd_helper.c
nscd_initgroups.c
nscd_netgroup.c
nscd_proto.h
nscd_setup_thread.c
nscd_stat.c
nscd-client.h
nscd.c
nscd.conf
nscd.h
nscd.init
nscd.service
nscd.tmpfiles
pwdcache.c
res_hconf.c
selinux.c
selinux.h
servicescache.c