Added new target support to Promise (#3707)

JerryScript-DCO-1.0-Signed-off-by: bence gabor kis kisbg@inf.u-szeged.hu

jerry-core/api/jerry.c

@@ -1616,7 +1616,17 @@ jerry_create_promise (void)
   jerry_assert_api_available ();
 
 #if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
-  return ecma_op_create_promise_object (ECMA_VALUE_EMPTY, ECMA_PROMISE_EXECUTOR_EMPTY);
+  ecma_object_t * old_new_target_p = JERRY_CONTEXT (current_new_target);
+
+  if (old_new_target_p == NULL)
+  {
+    JERRY_CONTEXT (current_new_target) = ecma_builtin_get (ECMA_BUILTIN_ID_PROMISE);
+  }
+
+  ecma_value_t promise_value =  ecma_op_create_promise_object (ECMA_VALUE_EMPTY, ECMA_PROMISE_EXECUTOR_EMPTY);
+
+  JERRY_CONTEXT (current_new_target) = old_new_target_p;
+  return promise_value;
 #else /* !ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
   return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Promise not supported.")));
 #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */

jerry-core/ecma/operations/ecma-promise-object.c

@@ -493,11 +493,20 @@ ecma_value_t
 ecma_op_create_promise_object (ecma_value_t executor, /**< the executor function or object */
                                ecma_promise_executor_type_t type) /**< indicates the type of executor */
 {
+  JERRY_ASSERT (JERRY_CONTEXT (current_new_target) != NULL);
   /* 3. */
-  ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_PROMISE_PROTOTYPE);
+  ecma_object_t *proto_p = ecma_op_get_prototype_from_constructor (JERRY_CONTEXT (current_new_target),
-  ecma_object_t *object_p = ecma_create_object (prototype_obj_p,
+                                                                   ECMA_BUILTIN_ID_PROMISE_PROTOTYPE);
+
+  if (JERRY_UNLIKELY (proto_p == NULL))
+  {
+    return ECMA_VALUE_ERROR;
+  }
+
+  ecma_object_t *object_p = ecma_create_object (proto_p,
                                                 sizeof (ecma_promise_object_t),
                                                 ECMA_OBJECT_TYPE_CLASS);
+  ecma_deref_object (proto_p);
   ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;
   ext_object_p->u.class_prop.class_id = LIT_MAGIC_STRING_PROMISE_UL;
   ext_object_p->u.class_prop.u.value = ECMA_VALUE_UNDEFINED;

tests/jerry/es2015/promise-new-target.js

@@ -0,0 +1,26 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+try {
+  Reflect.construct (Promise);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+class MyPromise extends Promise {};
+
+var p1= new MyPromise(function(){});
+assert(Object.getPrototypeOf(p1) == MyPromise.prototype)