+ pid_t ret;
+ sigset_t set;
+ __fork_handler(-1);
+ __block_all_sigs(&set);
+#ifdef SYS_fork
+ ret = __syscall(SYS_fork);
+#else
+ ret = __syscall(SYS_clone, SIGCHLD, 0);
+#endif
+ if (!ret) {
+ pthread_t self = __pthread_self();
+ self->tid = __syscall(SYS_gettid);
+ self->robust_list.off = 0;
+ self->robust_list.pending = 0;
+ self->next = self->prev = self;
+ __thread_list_lock = 0;
+ libc.threads_minus_1 = 0;
+ }
+ __restore_sigs(&set);
+ __fork_handler(!ret);
+ return __syscall_ret(ret);