* ruby.h
rb_objc_undef_method
rb_eval_string_protect
rb_eval_string_wrap
rb_catch
rb_catch_obj
ruby_init_stack
ruby_init_stack
rb_cISeq
rb_cEnv
ruby_native_thread_p
rb_add_event_hook
rb_remove_event_hook

* intern.h
rb_ary_print_on
rb_clear_cache
rb_clear_cache_by_class
rb_mark_end_proc
rb_gc_mark_threads
rb_thread_fd_close
rb_thread_signal_raise
rb_thread_main
ruby_set_stack_size
ruby_stack_check
ruby_stack_length
rb_gc_finalize_deferred
rb_gc_call_finalizer_at_exit
rb_gets
rb_symname_p
rb_sym_interned_p
rb_gc_mark_symbols
rb_sym_all_symbols
rb_reg_nth_defined
rb_set_kcode
rb_get_kcode
rb_trap_exec
rb_str_tmp_new
rb_str_free
rb_str_shared_replace
rb_str_locktmp
rb_str_unlocktmp
rb_str_dup_frozen
rb_str_sublen
rb_str_freeze
rb_str_plus
rb_str_hash_cmp
rb_str_comparable
rb_unblock_function_t
rb_blocking_function_t
rb_barrier_new
rb_barrier_wait
rb_barrier_release
rb_mark_generic_ivar
rb_mark_generic_ivar_tbl
rb_free_generic_ivar
Init_stack
rb_frame_method_id_and_class