[typedarrays] Check detached buffer at start of typed array methods

test/mjsunit/es6/typedarray-tostring.js

Index: test/mjsunit/es6/typedarray-tostring.js
diff --git a/test/mjsunit/es6/typedarray-tostring.js b/test/mjsunit/es6/typedarray-tostring.js
index 9d49cb1cc9a76b23c0e638f69bf71c42fa4e6e43..b3a2c68428ca02ce26a4dae8dc7760bba3622c7d 100644
--- a/test/mjsunit/es6/typedarray-tostring.js
+++ b/test/mjsunit/es6/typedarray-tostring.js
@@ -5,6 +5,8 @@
 // Array's toString should call the object's own join method, if one exists and
 // is callable. Otherwise, just use the original Object.toString function.
 
+// Flags: --allow-natives-syntax
+
 var typedArrayConstructors = [
   Uint8Array,
   Int8Array,
@@ -96,4 +98,10 @@ for (var constructor of typedArrayConstructors) {
 
     Number.prototype.toLocaleString = NumberToLocaleString;
   })();
+
+  // Detached Operation
+  var array = new constructor([1, 2, 3]);
+  %ArrayBufferNeuter(array.buffer);
+  assertThrows(() => array.join(), TypeError);
+  assertThrows(() => array.toLocalString(), TypeError);

[Camillo Bruni, 2017/04/03 08:18:14]

Please add the toString case as well (or a TODO if it still fails):
assertThrows(() => array.toString(), TypeError);

[Choongwoo Han, 2017/04/03 08:42:29]

Done.

 }