Introduce global contexts to represent lexical global scope(s).

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 4e0a86b318c2a8225cefe177bb4bce23269e0677..7dc4edf2e0e5d19e62d3c16edbc3d17fab321707 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -8738,6 +8738,24 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetConstructorDelegate) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_NewGlobalContext) {
+  NoHandleAllocation ha;
+  ASSERT(args.length() == 2);
+
+  CONVERT_ARG_CHECKED(JSFunction, function, 0);
+  CONVERT_ARG_CHECKED(ScopeInfo, scope_info, 1);
+  Object* result;
+  { MaybeObject* maybe_result =
+        isolate->heap()->AllocateGlobalContext(function, scope_info);
+    if (!maybe_result->ToObject(&result)) return maybe_result;

[Sven Panne, 2012/08/27 06:24:54]

Make result a Context*, use "...->To(&result)" and remove the cast below.

[rossberg, 2012/08/27 09:07:16]

Done (here and for NewFunctionContext below).

+  }
+
+  isolate->set_context(Context::cast(result));
+
+  return result;  // non-failure
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_NewFunctionContext) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 1);