diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/register-atfork.c')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/register-atfork.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/register-atfork.c b/nptl/sysdeps/unix/sysv/linux/register-atfork.c index 231fc9b091..bd103295fb 100644 --- a/nptl/sysdeps/unix/sysv/linux/register-atfork.c +++ b/nptl/sysdeps/unix/sysv/linux/register-atfork.c @@ -21,6 +21,7 @@ #include <stdlib.h> #include <string.h> #include <fork.h> +#include <atomic.h> /* Lock to protect allocation and deallocation of fork handlers. */ @@ -97,8 +98,7 @@ __register_atfork (prepare, parent, child, dso_handle) newp->child_handler = child; newp->dso_handle = dso_handle; - newp->next = __fork_handlers; - __fork_handlers = newp; + __linkin_atfork (newp); } /* Release the lock. */ @@ -109,6 +109,17 @@ __register_atfork (prepare, parent, child, dso_handle) libc_hidden_def (__register_atfork) +void +attribute_hidden +__linkin_atfork (struct fork_handler *newp) +{ + do + newp->next = __fork_handlers; + while (catomic_compare_and_exchange_bool_acq (&__fork_handlers, + newp, newp->next) != 0); +} + + libc_freeres_fn (free_mem) { /* Get the lock to not conflict with running forks. */ |