Link all global contexts into a weak list.

src/bootstrapper.cc

 // Copyright 2006-2008 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 1796 matching lines @@
     InstallJSFunctionResultCaches();
     InitializeNormalizedMapCaches();
     if (!InstallNatives()) return;
 
     MakeFunctionInstancePrototypeWritable();
 
     if (!ConfigureGlobalObjects(global_template)) return;
     i::Counters::contexts_created_from_scratch.Increment();
   }
 
+  // Add this context to the weak list of global contexts.
+  (*global_context_)->set(Context::NEXT_CONTEXT_LINK,
+                          Heap::global_contexts_list());
+  Heap::set_global_contexts_list(*global_context_);
+
   result_ = global_context_;
 }
 
 
 // Support for thread preemption.
 
 // Reserve space for statics needing saving and restoring.
 int Bootstrapper::ArchiveSpacePerThread() {
   return BootstrapperActive::ArchiveSpacePerThread();
 }
@@ skipping 31 matching lines @@
 }
 
 
 // Restore statics that are thread local.
 char* BootstrapperActive::RestoreState(char* from) {
   nesting_ = *reinterpret_cast<int*>(from);
   return from + sizeof(nesting_);
 }
 
 } }  // namespace v8::internal