address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) {

  {- -------------------------------------------
  (1) (変数宣言など)
      ---------------------------------------- -}

      address entry;

  {- -------------------------------------------
  (1) 探索する関数名(以下の jni_name)を作成する.
      (os::print_jni_name_prefix_on() や os::print_jni_name_suffix_on() の部分については, 
       引数に応じて付けるかどうかを決定)
      ---------------------------------------- -}

      // Compute complete JNI name for style
      stringStream st;
      if (os_style) os::print_jni_name_prefix_on(&st, args_size);
      st.print_raw(pure_name);
      st.print_raw(long_name);
      if (os_style) os::print_jni_name_suffix_on(&st, args_size);
      char* jni_name = st.as_string();

  {- -------------------------------------------
  (1) もし, 対象のクラスがシステムクラスであれば, 
      まず lookup_special_native() で特別な(対応付けがハードコーディングされた)関数かどうかを調べ, 
      それで駄目なら os::dll_lookup() で調べる.

      どちらかで探索対象の関数が見つかれば, ここでリターン.

      (なお, in_base_library はデバッグ用)
      ---------------------------------------- -}

      // If the loader is null we have a system class, so we attempt a lookup in
      // the native Java library. This takes care of any bootstrapping problems.
      // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find
      // gets found the first time around - otherwise an infinite loop can occure. This is
      // another VM/library dependency
      Handle loader(THREAD,
                    instanceKlass::cast(method->method_holder())->class_loader());
      if (loader.is_null()) {
        entry = lookup_special_native(jni_name);
        if (entry == NULL) {
           entry = (address) os::dll_lookup(os::native_java_library(), jni_name);
        }
        if (entry != NULL) {
          in_base_library = true;
          return entry;
        }
      }

  {- -------------------------------------------
  (1) 次に, Java の ClassLoader オブジェクトの findNative() メソッドを呼び出して探索を行う.
      ---------------------------------------- -}

      // Otherwise call static method findNative in ClassLoader
      KlassHandle   klass (THREAD, SystemDictionary::ClassLoader_klass());
      Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL);

      JavaValue result(T_LONG);
      JavaCalls::call_static(&result,
                             klass,
                             vmSymbols::findNative_name(),
                             vmSymbols::classloader_string_long_signature(),
                             // Arguments
                             loader,
                             name_arg,
                             CHECK_NULL);
      entry = (address) (intptr_t) result.get_jlong();

  {- -------------------------------------------
  (1) もしまだ探索対象が見つかっていなければ,
      JVMTI agent としてロードしたライブラリ内を os::dll_lookup() で探索する.

      探索対象の関数が見つかれば, ここでリターン.
      ---------------------------------------- -}

      if (entry == NULL) {
        // findNative didn't find it, if there are any agent libraries look in them
        AgentLibrary* agent;
        for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
          entry = (address) os::dll_lookup(agent->os_lib(), jni_name);
          if (entry != NULL) {
            return entry;
          }
        }
      }

  {- -------------------------------------------
  (1) 以上の探索処理の結果をリターン.
      ---------------------------------------- -}

      return entry;
    }