Add support for the global object in Object.keys (fixes issue 1150)

We do not currently handle the case where the JSGlobalProxy is passed
as argument to LocalKeys in runtime.cc.

Review URL: http://codereview.chromium.org/6516008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6762 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/runtime.cc

@@ -4212,6 +4212,14 @@ static MaybeObject* Runtime_LocalKeys(Arguments args) {
   CONVERT_CHECKED(JSObject, raw_object, args[0]);
   HandleScope scope;
   Handle<JSObject> object(raw_object);
+
+  if (object->IsJSGlobalProxy()) {
+    Handle<Object> proto(object->GetPrototype());
+    // If proxy is detached we simply return an empty array.
+    if (proto->IsNull()) return *Factory::NewJSArray(0);
+    object = Handle<JSObject>::cast(proto);
+  }
+
   Handle<FixedArray> contents = GetKeysInFixedArrayFor(object,
                                                        LOCAL_ONLY);
   // Some fast paths through GetKeysInFixedArrayFor reuse a cached

test/mjsunit/regress/regress-1150.js

+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test that Object.keys is working correctly on the global object.
+
+var a = 10;
+var global = (function () { return this; }) ();
+var keys = Object.keys(global);
+assertTrue(keys.indexOf("a") > 0);