diff options
Diffstat (limited to 'sysdeps/nptl')
| -rw-r--r-- | sysdeps/nptl/fork.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/sysdeps/nptl/fork.c b/sysdeps/nptl/fork.c index 72fa82a47b..db6d721fce 100644 --- a/sysdeps/nptl/fork.c +++ b/sysdeps/nptl/fork.c @@ -162,12 +162,20 @@ __libc_fork (void) #endif #ifdef __NR_set_robust_list - /* Initialize the robust mutex list which has been reset during - the fork. We do not check for errors since if it fails here - it failed at process start as well and noone could have used - robust mutexes. We also do not have to set - self->robust_head.futex_offset since we inherit the correct - value from the parent. */ + /* Initialize the robust mutex list setting in the kernel which has + been reset during the fork. We do not check for errors because if + it fails here, it must have failed at process startup as well and + nobody could have used robust mutexes. + Before we do that, we have to clear the list of robust mutexes + because we do not inherit ownership of mutexes from the parent. + We do not have to set self->robust_head.futex_offset since we do + inherit the correct value from the parent. We do not need to clear + the pending operation because it must have been zero when fork was + called. */ +# ifdef __PTHREAD_MUTEX_HAVE_PREV + self->robust_prev = &self->robust_head; +# endif + self->robust_head.list = &self->robust_head; # ifdef SHARED if (__builtin_expect (__libc_pthread_functions_init, 0)) PTHFCT_CALL (ptr_set_robust, (self)); |