rb_generic_ivar_table  735 include/ruby/intern.h struct st_table* rb_generic_ivar_table(VALUE);
rb_generic_ivar_table  539 marshal.c      #define has_ivars(obj, ivtbl) ((ivtbl = rb_generic_ivar_table(obj)) != 0 || \
rb_generic_ivar_table 2276 time.c                 st_delete(rb_generic_ivar_table(str), (st_data_t*)&id_submicro, 0);