Fix new ArrayBuffer(length) for variaous input (#1959)

Currently new ArrayBuffer(length) does not conform to ES2017.
Major JS implementations follow ES2017 for ArrayBuffer(length).

For example, new ArrayBuffer(length) should not throw RangeError
for length = NaN, undefined, negative number, floating point, and so on.

JerryScript-DCO-1.0-Signed-off-by: Sanggyu Lee sg5.lee@samsung.com

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

@@ -75,15 +75,14 @@ ecma_op_create_arraybuffer_object (const ecma_value_t *arguments_list_p, /**< li
 {
   JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);
 
-  uint32_t length = 0;
+  ecma_number_t length_num = 0;
 
   if (arguments_list_len > 0)
   {
-    ecma_number_t num;
 
     if (ecma_is_value_number (arguments_list_p[0]))
     {
-      num = ecma_get_number_from_value (arguments_list_p[0]);
+      length_num = ecma_get_number_from_value (arguments_list_p[0]);
     }
     else
     {
@@ -94,21 +93,27 @@ ecma_op_create_arraybuffer_object (const ecma_value_t *arguments_list_p, /**< li
         return to_number_value;
       }
 
-      num = ecma_get_number_from_value (to_number_value);
+      length_num = ecma_get_number_from_value (to_number_value);
 
       ecma_free_value (to_number_value);
     }
 
-    length = ecma_number_to_uint32 (num);
+    if (ecma_number_is_nan (length_num))
+    {
+      length_num = 0;
+    }
 
-    if (num != ((ecma_number_t) length)
-        || length > (UINT32_MAX - sizeof (ecma_extended_object_t) - JMEM_ALIGNMENT + 1))
+    const uint32_t maximum_size_in_byte = UINT32_MAX - sizeof (ecma_extended_object_t) - JMEM_ALIGNMENT + 1;
+
+    if (length_num <= -1.0 || length_num > (double) maximum_size_in_byte + 0.5)
     {
       return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid ArrayBuffer length."));
     }
   }
 
-  return ecma_make_object_value (ecma_arraybuffer_new_object (length));
+  uint32_t length_uint32 = ecma_number_to_uint32 (length_num);
+
+  return ecma_make_object_value (ecma_arraybuffer_new_object (length_uint32));
 } /* ecma_op_create_arraybuffer_object */
 
 /**

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-001.js

@@ -15,3 +15,4 @@
 
 var a = new ArrayBuffer();
 assert(typeof a === 'object');
+assert(a.byteLength === 0);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-002.js

@@ -15,3 +15,4 @@
 
 var a = new ArrayBuffer(5);
 assert(typeof a === 'object');
+assert(a.byteLength === 5);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-003.js

@@ -15,3 +15,4 @@
 
 var a = new ArrayBuffer("5");
 assert(typeof a === 'object');
+assert(a.byteLength === 5);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-006.js

@@ -13,15 +13,5 @@
  * limitations under the License.
  */
 
-var name = "";
-
-try
-{
-  var a = new ArrayBuffer(5.5);
-}
-catch (e)
-{
-  name = e.name;
-}
-
-assert(name === "RangeError");
+var a = new ArrayBuffer(5.5);
+assert(a.byteLength === 5);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-007.js

@@ -13,15 +13,5 @@
  * limitations under the License.
  */
 
-var name = "";
-
-try
-{
-  var a = new ArrayBuffer("string");
-}
-catch (e)
-{
-  name = e.name;
-}
-
-assert(name === "RangeError");
+var a = new ArrayBuffer("string");
+assert(a.byteLength === 0);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-008.js

@@ -13,15 +13,6 @@
  * limitations under the License.
  */
 
-var name = "";
 var obj = {};
-try
-{
-  var a = new ArrayBuffer(obj);
-}
-catch (e)
-{
-  name = e.name;
-}
-
-assert(name === "RangeError");
+var a = new ArrayBuffer(obj);
+assert(a.byteLength === 0);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-009.js

@@ -0,0 +1,17 @@
+/* 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.
+ */
+
+var a = new ArrayBuffer(undefined);
+assert(a.byteLength === 0);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-010.js

@@ -0,0 +1,17 @@
+/* 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.
+ */
+
+var a = new ArrayBuffer(NaN);
+assert(a.byteLength === 0);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-011.js

@@ -0,0 +1,20 @@
+/* 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.
+ */
+
+var a = new ArrayBuffer(-0.3);
+assert(a.byteLength === 0);
+
+var b = new ArrayBuffer(-0.9);
+assert(b.byteLength === 0);

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-012.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.
+ */
+
+var name = "";
+try
+{
+  var a = new ArrayBuffer(-1.9);
+}
+catch (e)
+{
+  name = e.name;
+}
+
+assert(name === "RangeError");

tests/jerry-test-suite/es2015/24/24.01/24.01.02/24.01.02-013.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.
+ */
+
+var name = "";
+try
+{
+  var a = new ArrayBuffer(Math.pow(2, 32) - 1);
+}
+catch (e)
+{
+  name = e.name;
+}
+
+assert(name === "RangeError");