Process weak references between optimized JSFunctions on scavenges.

src/incremental-marking.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 812 matching lines @@
       // TODO(gc) switch to static visitor instead of normal visitor.
       if (map == global_context_map) {
         // Global contexts have weak fields.
         Context* ctx = Context::cast(obj);
 
         // We will mark cache black with a separate pass
         // when we finish marking.
         MarkObjectGreyDoNotEnqueue(ctx->normalized_map_cache());
 
         VisitGlobalContext(ctx, &marking_visitor);
+      } else if (map->instance_type() == JS_FUNCTION_TYPE) {
+        marking_visitor.VisitPointers(
+            HeapObject::RawField(obj, JSFunction::kPropertiesOffset),
+            HeapObject::RawField(obj, JSFunction::kCodeEntryOffset));
+
+        marking_visitor.VisitCodeEntry(
+            obj->address() + JSFunction::kCodeEntryOffset);
+
+        marking_visitor.VisitPointers(
+            HeapObject::RawField(obj,
+                                 JSFunction::kCodeEntryOffset + kPointerSize),
+            HeapObject::RawField(obj,
+                                 JSFunction::kNonWeakFieldsEndOffset));
       } else {
         obj->IterateBody(map->instance_type(), size, &marking_visitor);
       }
 
       MarkBit obj_mark_bit = Marking::MarkBitFrom(obj);
       SLOW_ASSERT(Marking::IsGrey(obj_mark_bit) ||
                   (obj->IsFiller() && Marking::IsWhite(obj_mark_bit)));
       Marking::MarkBlack(obj_mark_bit);
       MemoryChunk::IncrementLiveBytesFromGC(obj->address(), size);
     }
@@ skipping 92 matching lines @@
   allocation_marking_factor_ = kInitialAllocationMarkingFactor;
   bytes_scanned_ = 0;
 }
 
 
 int64_t IncrementalMarking::SpaceLeftInOldSpace() {
   return heap_->MaxOldGenerationSize() - heap_->PromotedSpaceSize();
 }
 
 } }  // namespace v8::internal