Link all global contexts into a weak list.

src/objects-visiting.h

 // Copyright 2006-2009 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
@@ skipping 32 matching lines @@
 
 // Base class for all static visitors.
 class StaticVisitorBase : public AllStatic {
  public:
   enum VisitorId {
     kVisitSeqAsciiString = 0,
     kVisitSeqTwoByteString,
     kVisitShortcutCandidate,
     kVisitByteArray,
     kVisitFixedArray,
+    kVisitGlobalContext,
 
     // For data objects, JS objects and structs along with generic visitor which
     // can visit object of any size we provide visitors specialized by
     // object size in words.
     // Ids of specialized visitors are declared in a linear order (without
     // holes) starting from the id of visitor specialized for 2 words objects
     // (base visitor id) and ending with the id of generic visitor.
     // Method GetVisitorIdForSize depends on this ordering to calculate visitor
     // id of specialized visitor from given instance size, base visitor id and
     // generic visitor's id.
@@ skipping 193 matching lines @@
     table_.Register(kVisitConsString,
                     &FixedBodyVisitor<StaticVisitor,
                                       ConsString::BodyDescriptor,
                                       int>::Visit);
 
     table_.Register(kVisitFixedArray,
                     &FlexibleBodyVisitor<StaticVisitor,
                                          FixedArray::BodyDescriptor,
                                          int>::Visit);
 
+    table_.Register(kVisitGlobalContext,
+                    &FixedBodyVisitor<StaticVisitor,
+                                      Context::ScavengeBodyDescriptor,
+                                      int>::Visit);
+
     table_.Register(kVisitByteArray, &VisitByteArray);
 
     table_.Register(kVisitSharedFunctionInfo,
                     &FixedBodyVisitor<StaticVisitor,
                                       SharedFunctionInfo::BodyDescriptor,
                                       int>::Visit);
 
     table_.Register(kVisitSeqAsciiString, &VisitSeqAsciiString);
 
     table_.Register(kVisitSeqTwoByteString, &VisitSeqTwoByteString);
@@ skipping 107 matching lines @@
 
   for (; !it.done(); it.next()) {
     it.rinfo()->template Visit<StaticVisitor>();
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_VISITING_H_