// register extension functions and events. In this implementation we
// have a single extension function (to prove the API) that tests if class
// unloading is enabled or disabled. We also have a single extension event
// EXT_EVENT_CLASS_UNLOAD which is used to provide the JVMDI_EVENT_CLASS_UNLOAD
// event. The function and the event are registered here.
//

void JvmtiExtensions::register_extensions() {

  {- -------------------------------------------
  (1) (フィールドの初期化)
      ---------------------------------------- -}

      _ext_functions = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionFunctionInfo*>(1,true);
      _ext_events = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionEventInfo*>(1,true);

  {- -------------------------------------------
  (1) (以下が extension function の登録処理)
      ---------------------------------------- -}

      // register our extension function

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

      static jvmtiParamInfo func_params[] = {
        { (char*)"IsClassUnloadingEnabled", JVMTI_KIND_OUT,  JVMTI_TYPE_JBOOLEAN, JNI_FALSE }
      };
      static jvmtiExtensionFunctionInfo ext_func = {
        (jvmtiExtensionFunction)IsClassUnloadingEnabled,
        (char*)"com.sun.hotspot.functions.IsClassUnloadingEnabled",
        (char*)"Tell if class unloading is enabled (-noclassgc)",
        sizeof(func_params)/sizeof(func_params[0]),
        func_params,
        0,              // no non-universal errors
        NULL
      };

    {- -------------------------------------------
  (1.1) (フィールドの初期化)
        (_ext_functions に値をセット)
        ---------------------------------------- -}

      _ext_functions->append(&ext_func);

  {- -------------------------------------------
  (1) (以下が extension event の登録処理)
      ---------------------------------------- -}

      // register our extension event

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

      static jvmtiParamInfo event_params[] = {
        { (char*)"JNI Environment", JVMTI_KIND_IN, JVMTI_TYPE_JNIENV, JNI_FALSE },
        { (char*)"Thread", JVMTI_KIND_IN, JVMTI_TYPE_JTHREAD, JNI_FALSE },
        { (char*)"Class", JVMTI_KIND_IN, JVMTI_TYPE_JCLASS, JNI_FALSE }
      };
      static jvmtiExtensionEventInfo ext_event = {
        EXT_EVENT_CLASS_UNLOAD,
        (char*)"com.sun.hotspot.events.ClassUnload",
        (char*)"CLASS_UNLOAD event",
        sizeof(event_params)/sizeof(event_params[0]),
        event_params
      };

    {- -------------------------------------------
  (1.1) (フィールドの初期化)
        (_ext_events に値をセット)
        ---------------------------------------- -}

      _ext_events->append(&ext_event);
    }