Use InternalArray in Object.defineProperties to avoid issues with overwriten...

Use InternalArray in Object.defineProperties to avoid issues with overwriten properties on Array.prototype

TEST=mjsunit/regress/regress-1625
BUG=v8:1625
Review URL: http://codereview.chromium.org/7631039

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8964 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/v8natives.js

@@ -1015,24 +1015,27 @@ function ObjectDefineProperty(obj, p, attributes) {
 }
 
 
+function GetOwnEnumerablePropertyNames(properties) {
+  var names = new InternalArray();
+  for (var key in properties) {
+    if (%HasLocalProperty(properties, key)) {
+      names.push(key);
+    }
+  }
+  return names;
+}
+
+
 // ES5 section 15.2.3.7.
 function ObjectDefineProperties(obj, properties) {
   if (!IS_SPEC_OBJECT(obj))
     throw MakeTypeError("obj_ctor_property_non_object", ["defineProperties"]);
   var props = ToObject(properties);
-  var key_values = [];
-  for (var key in props) {
-    if (%HasLocalProperty(props, key)) {
-      key_values.push(key);
-      var value = props[key];
-      var desc = ToPropertyDescriptor(value);
-      key_values.push(desc);
-    }
-  }
-  for (var i = 0; i < key_values.length; i += 2) {
-    var key = key_values[i];
-    var desc = key_values[i + 1];
-    DefineOwnProperty(obj, key, desc, true);
+  var names = GetOwnEnumerablePropertyNames(props);
+  for (var i = 0; i < names.length; i++) {
+    var name = names[i];
+    var desc = ToPropertyDescriptor(props[name]);
+    DefineOwnProperty(obj, name, desc, true);
   }
   return obj;
 }

test/mjsunit/regress/regress-1625.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 overwriting Array.prototype.push does not make
+// Object.defineProperties misbehave.
+
+Array.prototype.push = 1;
+var desc = {foo: {value: 10}, bar: {get: function() {return 42; }}};
+var obj = {};
+var x = Object.defineProperties(obj, desc);
+assertEquals(x.foo, 10);
+assertEquals(x.bar, 42);