Allow eval to be overridden with a callable non-function object.

We simply need to remove early checks in the resolve eval runtime
functions. CallFunctionStub that follows will handle non-functions in
the right way.

Review URL: http://codereview.chromium.org/6591075

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7005 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/runtime.cc

@@ -7872,12 +7872,9 @@ static ObjectPair CompileGlobalEval(Handle<String> source,
 
 static ObjectPair Runtime_ResolvePossiblyDirectEval(Arguments args) {
   ASSERT(args.length() == 4);
-  if (!args[0]->IsJSFunction()) {
-    return MakePair(Top::ThrowIllegalOperation(), NULL);
-  }
 
   HandleScope scope;
-  Handle<JSFunction> callee = args.at<JSFunction>(0);
+  Handle<Object> callee = args.at<Object>(0);
   Handle<Object> receiver;  // Will be overwritten.
 
   // Compute the calling context.
@@ -7945,12 +7942,9 @@ static ObjectPair Runtime_ResolvePossiblyDirectEval(Arguments args) {
 
 static ObjectPair Runtime_ResolvePossiblyDirectEvalNoLookup(Arguments args) {
   ASSERT(args.length() == 4);
-  if (!args[0]->IsJSFunction()) {
-    return MakePair(Top::ThrowIllegalOperation(), NULL);
-  }
 
   HandleScope scope;
-  Handle<JSFunction> callee = args.at<JSFunction>(0);
+  Handle<Object> callee = args.at<Object>(0);
 
   // 'eval' is bound in the global context, but it may have been overwritten.
   // Compare it to the builtin 'GlobalEval' function to make sure.

test/mjsunit/override-eval-with-non-function.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.
+
+// When 'eval' is overridden with a non-function object we should
+// check whether the object is callable.
+
+function test() {
+  eval = /foo/;
+  assertEquals("foo", eval("foobar"));
+}
+
+test();