RUBY_UBF_IO        25 ext/-test-/gvl/call_without_gvl/call_without_gvl.c     rb_thread_call_without_gvl(native_sleep_callback, &timeval, RUBY_UBF_IO, NULL);
RUBY_UBF_IO       214 ext/readline/readline.c     rb_thread_call_without_gvl2(getc_func, &data, RUBY_UBF_IO, NULL);
RUBY_UBF_IO      1127 ext/socket/ancdata.c     return (ssize_t)rb_thread_call_without_gvl(nogvl_sendmsg_func, &args, RUBY_UBF_IO, 0);
RUBY_UBF_IO      1359 ext/socket/ancdata.c     return (ssize_t)rb_thread_call_without_gvl(nogvl_recvmsg_func, &args, RUBY_UBF_IO, 0);
RUBY_UBF_IO       309 ext/socket/raddrinfo.c         ret = (int)(VALUE)rb_thread_call_without_gvl(nogvl_getaddrinfo, &arg, RUBY_UBF_IO, 0);
RUBY_UBF_IO       379 ext/socket/raddrinfo.c     ret = (int)(VALUE)rb_thread_call_without_gvl(nogvl_getnameinfo, &arg, RUBY_UBF_IO, 0);
RUBY_UBF_IO       998 io.c           						RUBY_UBF_IO, NULL);
RUBY_UBF_IO      1060 io.c           					     RUBY_UBF_IO, NULL);
RUBY_UBF_IO      4177 io.c               return (int)(intptr_t)rb_thread_call_without_gvl(nogvl_close, &fd, RUBY_UBF_IO, 0);
RUBY_UBF_IO      4194 io.c               return (int)(intptr_t)rb_thread_call_without_gvl(nogvl_fclose, file, RUBY_UBF_IO, 0);
RUBY_UBF_IO      5417 io.c               fd = (int)(VALUE)rb_thread_call_without_gvl(sysopen_func, data, RUBY_UBF_IO, 0);
RUBY_UBF_IO      10675 io.c               rb_thread_call_without_gvl(nogvl_copy_stream_func, (void*)stp, RUBY_UBF_IO, 0);
RUBY_UBF_IO      2335 process.c                      rb_thread_call_without_gvl2(open_func, (void *)&open_data, RUBY_UBF_IO, 0);
RUBY_UBF_IO      1293 thread.c           if (ubf == RUBY_UBF_IO || ubf == RUBY_UBF_PROCESS) {