ret = syscall(SYS_fork);
if (libc.main_thread && !ret) {
pthread_t self = __pthread_self();
self->tid = self->pid = syscall(SYS_getpid);
ret = syscall(SYS_fork);
if (libc.main_thread && !ret) {
pthread_t self = __pthread_self();
self->tid = self->pid = syscall(SYS_getpid);