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

src/runtime/runtime-typedarray.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/elements.h"
 #include "src/factory.h"
 #include "src/messages.h"
@@ skipping 342 matching lines @@
   return Smi::FromInt(FLAG_typed_array_max_size_in_heap);
 }
 
 
 RUNTIME_FUNCTION(Runtime_IsTypedArray) {
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   return isolate->heap()->ToBoolean(args[0]->IsJSTypedArray());
 }
 
+RUNTIME_FUNCTION(Runtime_WasNeutered) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(1, args.length());
+  return isolate->heap()->ToBoolean(JSTypedArray::cast(args[0])->WasNeutered());
+}
 
 RUNTIME_FUNCTION(Runtime_IsSharedTypedArray) {
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   return isolate->heap()->ToBoolean(
       args[0]->IsJSTypedArray() &&
       JSTypedArray::cast(args[0])->GetBuffer()->is_shared());
 }
 
 
@@ skipping 19 matching lines @@
     return isolate->heap()->false_value();
   }
 
   Handle<JSTypedArray> obj(JSTypedArray::cast(args[0]));
   return isolate->heap()->ToBoolean(obj->GetBuffer()->is_shared() &&
                                     obj->type() == kExternalInt32Array);
 }
 
 }  // namespace internal
 }  // namespace v8