Update object.prototype.toString to conform ES11 standard (#4196)

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

jerry-core/ecma/builtin-objects/ecma-builtin-helpers.c

@@ -167,6 +167,18 @@ ecma_builtin_helper_object_to_string (const ecma_value_t this_arg) /**< this arg
       ecma_deref_object (obj_p);
       return ecma_builtin_helper_object_to_string_tag_helper (tag);
     }
+    else if (builtin_tag != LIT_MAGIC_STRING_ARGUMENTS_UL
+             && builtin_tag != LIT_MAGIC_STRING_FUNCTION_UL
+             && builtin_tag != LIT_MAGIC_STRING_ERROR_UL
+             && builtin_tag != LIT_MAGIC_STRING_BOOLEAN_UL
+             && builtin_tag != LIT_MAGIC_STRING_NUMBER_UL
+             && builtin_tag != LIT_MAGIC_STRING_STRING_UL
+             && builtin_tag != LIT_MAGIC_STRING_DATE_UL
+             && builtin_tag != LIT_MAGIC_STRING_REGEXP_UL
+             && builtin_tag != LIT_MAGIC_STRING_ARRAY_UL)
+    {
+      builtin_tag = LIT_MAGIC_STRING_OBJECT_UL;
+    }
 
     ecma_free_value (tag);
 #endif /* ENABLED (JERRY_ESNEXT) */

jerry-core/ecma/operations/ecma-objects.c

@@ -2670,6 +2670,19 @@ ecma_object_get_class_name (ecma_object_t *obj_p) /**< object */
     {
       return LIT_MAGIC_STRING_FUNCTION_UL;
     }
+#if ENABLED (JERRY_ESNEXT)
+    case ECMA_OBJECT_TYPE_PROXY:
+    {
+      ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
+
+      if (!ecma_is_value_null (proxy_obj_p->target) && ecma_is_value_object (proxy_obj_p->target))
+      {
+        ecma_object_t *target_obj_p = ecma_get_object_from_value (proxy_obj_p->target);
+        return ecma_object_get_class_name (target_obj_p);
+      }
+      return LIT_MAGIC_STRING_OBJECT_UL;
+    }
+#endif /* ENABLED (JERRY_ESNEXT) */
     default:
     {
       JERRY_ASSERT (type == ECMA_OBJECT_TYPE_GENERAL || type == ECMA_OBJECT_TYPE_PROXY);

tests/jerry/es.next/object-prototype-tostring.js

@@ -21,7 +21,7 @@ assert (Symbol.prototype[Symbol.toStringTag] === undefined);
 Symbol.prototype[Symbol.toStringTag] = "myStringTag1";
 assert (Object.prototype.toString.call (Symbol ()) === "[object myStringTag1]");
 Symbol.prototype[Symbol.toStringTag] = {};
-assert (Object.prototype.toString.call (Symbol ()) === "[object Symbol]");
+assert (Object.prototype.toString.call (Symbol ()) === "[object Object]");
 
 /* Math @@toStringTag */
 assert (Math[Symbol.toStringTag] === "Math");
@@ -32,7 +32,7 @@ assert (Math[Symbol.toStringTag] === undefined);
 Math[Symbol.toStringTag] = "myStringTag2";
 assert (Object.prototype.toString.call (Math) === "[object myStringTag2]");
 Math[Symbol.toStringTag] = {};
-assert (Object.prototype.toString.call (Math) === "[object Math]");
+assert (Object.prototype.toString.call (Math) === "[object Object]");
 
 /* ArrayBuffer.prototype @@toStringTag */
 assert (ArrayBuffer.prototype[Symbol.toStringTag] === "ArrayBuffer");
@@ -43,7 +43,7 @@ assert (ArrayBuffer.prototype[Symbol.toStringTag] === undefined);
 ArrayBuffer.prototype[Symbol.toStringTag] = "myStringTag3";
 assert (Object.prototype.toString.call (new ArrayBuffer ()) === "[object myStringTag3]");
 ArrayBuffer.prototype[Symbol.toStringTag] = {};
-assert (ArrayBuffer.prototype.toString.call (new ArrayBuffer ()) === "[object ArrayBuffer]");
+assert (ArrayBuffer.prototype.toString.call (new ArrayBuffer ()) === "[object Object]");
 
 /* Promise.prototype @@toStringTag */
 assert (Promise.prototype[Symbol.toStringTag] === "Promise");
@@ -54,7 +54,7 @@ assert (Promise.prototype[Symbol.toStringTag] === undefined);
 Promise.prototype[Symbol.toStringTag] = "myStringTag4";
 assert (Object.prototype.toString.call (new Promise (function () {})) === "[object myStringTag4]");
 Promise.prototype[Symbol.toStringTag] = {};
-assert (Promise.prototype.toString.call (new Promise (function () {})) === "[object Promise]");
+assert (Promise.prototype.toString.call (new Promise (function () {})) === "[object Object]");
 
 /* Map.prototype @@toStringTag */
 assert (Map.prototype[Symbol.toStringTag] === "Map");
@@ -67,7 +67,7 @@ Map.prototype[Symbol.toStringTag] = "myStringTag5";
 assert (Map.prototype.toString.call (new Map ()) === "[object myStringTag5]");
 assert (Object.prototype.toString.call (Map) === "[object Function]");
 Map.prototype[Symbol.toStringTag] = {};
-assert (Map.prototype.toString.call (new Map) === "[object Map]");
+assert (Map.prototype.toString.call (new Map) === "[object Object]");
 
 /* JSON @@toStringTag */
 assert (JSON[Symbol.toStringTag] === "JSON");
@@ -78,7 +78,7 @@ assert (JSON[Symbol.toStringTag] === undefined);
 JSON[Symbol.toStringTag] = "myStringTag6";
 assert (Map.prototype.toString.call (JSON) === "[object myStringTag6]");
 JSON[Symbol.toStringTag] = {};
-assert (Object.prototype.toString.call (JSON) === "[object JSON]");
+assert (Object.prototype.toString.call (JSON) === "[object Object]");
 
 var typedArrayTypes = ["Int8Array",
                        "Uint8Array",

tests/test262-esnext-excludelist.xml

@@ -806,9 +806,6 @@
   <test id="built-ins/Object/entries/order-after-define-property.js"><reason></reason></test>
   <test id="built-ins/Object/keys/order-after-define-property.js"><reason></reason></test>
   <test id="built-ins/Object/proto-from-ctor-realm.js"><reason></reason></test>
-  <test id="built-ins/Object/prototype/toString/proxy-function.js"><reason></reason></test>
-  <test id="built-ins/Object/prototype/toString/symbol-tag-non-str-bigint.js"><reason></reason></test>
-  <test id="built-ins/Object/prototype/toString/symbol-tag-non-str-builtin.js"><reason></reason></test>
   <test id="built-ins/Object/prototype/toString/symbol-tag-non-str-proxy-function.js"><reason></reason></test>
   <test id="built-ins/Object/subclass-object-arg.js"><reason></reason></test>
   <test id="built-ins/Promise/all/invoke-resolve-get-error.js"><reason>Test expects incorrect call order</reason></test>
@@ -8926,5 +8923,4 @@
   <test id="language/expressions/optional-chaining/short-circuiting.js"><reason></reason></test>
   <test id="language/expressions/optional-chaining/super-property-optional-call.js"><reason></reason></test>
   <!-- END - ES2020: Optional Chaining -->
-
 </excludeList>