Enable incremental code flushing.

src/contexts.cc

 // 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
@@ skipping 233 matching lines @@
   ASSERT(IsNativeContext());
 #ifdef DEBUG
   if (FLAG_enable_slow_asserts) {
     Object* element = get(OPTIMIZED_FUNCTIONS_LIST);
     while (!element->IsUndefined()) {
       CHECK(element != function);
       element = JSFunction::cast(element)->next_function_link();
     }
   }
 
-  CHECK(function->next_function_link()->IsUndefined());
-
   // Check that the context belongs to the weak native contexts list.
   bool found = false;
   Object* context = GetHeap()->native_contexts_list();
   while (!context->IsUndefined()) {
     if (context == this) {
       found = true;
       break;
     }
     context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK);
   }
   CHECK(found);
 #endif
+
+  // If the function link field is already used then the function was
+  // enqueued as a code flushing candidate and we remove it now.
+  if (!function->next_function_link()->IsUndefined()) {
+    CodeFlusher* flusher = GetHeap()->mark_compact_collector()->code_flusher();
+    flusher->EvictCandidate(function);
+  }
+
+  ASSERT(function->next_function_link()->IsUndefined());
+
   function->set_next_function_link(get(OPTIMIZED_FUNCTIONS_LIST));
   set(OPTIMIZED_FUNCTIONS_LIST, function);
 }
 
 
 void Context::RemoveOptimizedFunction(JSFunction* function) {
   ASSERT(IsNativeContext());
   Object* element = get(OPTIMIZED_FUNCTIONS_LIST);
   JSFunction* prev = NULL;
   while (!element->IsUndefined()) {
@@ skipping 56 matching lines @@
   // During bootstrapping we allow all objects to pass as global
   // objects. This is necessary to fix circular dependencies.
   Isolate* isolate = Isolate::Current();
   return isolate->heap()->gc_state() != Heap::NOT_IN_GC ||
       isolate->bootstrapper()->IsActive() ||
       object->IsGlobalObject();
 }
 #endif
 
 } }  // namespace v8::internal