ruby-104/ruby/eval.c

910     rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
911     /* check if prev_cfp can be accessible */
912     if ((void *)(th->stack + th->stack_size) == (void *)(prev_cfp)) {
915     return prev_cfp;
921     rb_control_frame_t *prev_cfp = previous_frame(GET_THREAD());
922     if (!prev_cfp) return 0;
923     return frame_called_id(prev_cfp);
929     rb_control_frame_t *prev_cfp = previous_frame(GET_THREAD());
930     if (!prev_cfp) return 0;
931     return frame_func_id(prev_cfp);
1351     rb_control_frame_t *prev_cfp = previous_frame(GET_THREAD());
1354     if (cref->nd_next || (prev_cfp && prev_cfp->me)) {