Merge 6168:6800 from bleeding_edge to experimental/gc branch.

src/handles.cc

Index: src/handles.cc
===================================================================
--- src/handles.cc	(revision 6800)
+++ src/handles.cc	(working copy)
@@ -280,16 +280,27 @@
 }
 
 
-Handle<Object> IgnoreAttributesAndSetLocalProperty(
+Handle<Object> SetLocalPropertyIgnoreAttributes(
     Handle<JSObject> object,
     Handle<String> key,
     Handle<Object> value,
     PropertyAttributes attributes) {
   CALL_HEAP_FUNCTION(object->
-      IgnoreAttributesAndSetLocalProperty(*key, *value, attributes), Object);
+      SetLocalPropertyIgnoreAttributes(*key, *value, attributes), Object);
 }
 
 
+void SetLocalPropertyNoThrow(Handle<JSObject> object,
+                             Handle<String> key,
+                             Handle<Object> value,
+                             PropertyAttributes attributes) {
+  ASSERT(!Top::has_pending_exception());
+  CHECK(!SetLocalPropertyIgnoreAttributes(
+        object, key, value, attributes).is_null());
+  CHECK(!Top::has_pending_exception());
+}
+
+
 Handle<Object> SetPropertyWithInterceptor(Handle<JSObject> object,
                                           Handle<String> key,
                                           Handle<Object> value,
@@ -422,6 +433,15 @@
 }
 
 
+Handle<Object> SetOwnElement(Handle<JSObject> object,
+                             uint32_t index,
+                             Handle<Object> value) {
+  ASSERT(!object->HasPixelElements());
+  ASSERT(!object->HasExternalArrayElements());
+  CALL_HEAP_FUNCTION(object->SetElement(index, *value, false), Object);
+}
+
+
 Handle<JSObject> Copy(Handle<JSObject> obj) {
   CALL_HEAP_FUNCTION(Heap::CopyJSObject(*obj), JSObject);
 }
@@ -799,6 +819,7 @@
                               ClearExceptionFlag flag) {
   // Compile the source information to a code object.
   ASSERT(info->IsOptimizing() || !info->shared_info()->is_compiled());
+  ASSERT(!Top::has_pending_exception());
   bool result = Compiler::CompileLazy(info);
   ASSERT(result != Top::has_pending_exception());
   if (!result && flag == CLEAR_EXCEPTION) Top::clear_pending_exception();
@@ -864,7 +885,7 @@
                                            int expected_additional_properties,
                                            bool condition) {
   object_ = object;
-  if (condition && object_->HasFastProperties()) {
+  if (condition && object_->HasFastProperties() && !object->IsJSGlobalProxy()) {
     // Normalize the properties of object to avoid n^2 behavior
     // when extending the object multiple properties. Indicate the number of
     // properties to be added.