Make cells pointing to JSObjects weak in optimized code.

tools/v8heapconst.py

 # Copyright 2013 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 208 matching lines @@
   ("OLD_POINTER_SPACE", 0x080d1): "UninitializedValue",
   ("OLD_POINTER_SPACE", 0x080e1): "NoInterceptorResultSentinel",
   ("OLD_POINTER_SPACE", 0x080f1): "ArgumentsMarker",
   ("OLD_POINTER_SPACE", 0x08101): "NumberStringCache",
   ("OLD_POINTER_SPACE", 0x08909): "SingleCharacterStringCache",
   ("OLD_POINTER_SPACE", 0x08d11): "StringSplitCache",
   ("OLD_POINTER_SPACE", 0x09119): "RegExpMultipleCache",
   ("OLD_POINTER_SPACE", 0x09521): "TerminationException",
   ("OLD_POINTER_SPACE", 0x09531): "MessageListeners",
   ("OLD_POINTER_SPACE", 0x0954d): "CodeStubs",
-  ("OLD_POINTER_SPACE", 0x0a9d9): "NonMonomorphicCache",
-  ("OLD_POINTER_SPACE", 0x0afed): "PolymorphicCodeCache",
-  ("OLD_POINTER_SPACE", 0x0aff5): "NativesSourceCache",
-  ("OLD_POINTER_SPACE", 0x0b03d): "EmptyScript",
-  ("OLD_POINTER_SPACE", 0x0b075): "IntrinsicFunctionNames",
-  ("OLD_POINTER_SPACE", 0x0e091): "ObservationState",
-  ("OLD_POINTER_SPACE", 0x0e09d): "FrozenSymbol",
-  ("OLD_POINTER_SPACE", 0x0e0a9): "ElementsTransitionSymbol",
-  ("OLD_POINTER_SPACE", 0x0e0b5): "EmptySlowElementDictionary",
-  ("OLD_POINTER_SPACE", 0x0e251): "ObservedSymbol",
-  ("OLD_POINTER_SPACE", 0x29861): "StringTable",
+  ("OLD_POINTER_SPACE", 0x10485): "NonMonomorphicCache",
+  ("OLD_POINTER_SPACE", 0x10a99): "PolymorphicCodeCache",
+  ("OLD_POINTER_SPACE", 0x10aa1): "NativesSourceCache",
+  ("OLD_POINTER_SPACE", 0x10aed): "EmptyScript",
+  ("OLD_POINTER_SPACE", 0x10b25): "IntrinsicFunctionNames",
+  ("OLD_POINTER_SPACE", 0x13b41): "ObservationState",
+  ("OLD_POINTER_SPACE", 0x13b4d): "FrozenSymbol",
+  ("OLD_POINTER_SPACE", 0x13b5d): "ElementsTransitionSymbol",
+  ("OLD_POINTER_SPACE", 0x13b6d): "EmptySlowElementDictionary",
+  ("OLD_POINTER_SPACE", 0x13d09): "ObservedSymbol",
+  ("OLD_POINTER_SPACE", 0x32325): "StringTable",
   ("OLD_DATA_SPACE", 0x08099): "EmptyDescriptorArray",
   ("OLD_DATA_SPACE", 0x080a1): "EmptyFixedArray",
   ("OLD_DATA_SPACE", 0x080a9): "NanValue",
   ("OLD_DATA_SPACE", 0x08141): "EmptyByteArray",
-  ("OLD_DATA_SPACE", 0x08269): "EmptyExternalByteArray",
-  ("OLD_DATA_SPACE", 0x08275): "EmptyExternalUnsignedByteArray",
-  ("OLD_DATA_SPACE", 0x08281): "EmptyExternalShortArray",
-  ("OLD_DATA_SPACE", 0x0828d): "EmptyExternalUnsignedShortArray",
-  ("OLD_DATA_SPACE", 0x08299): "EmptyExternalIntArray",
-  ("OLD_DATA_SPACE", 0x082a5): "EmptyExternalUnsignedIntArray",
-  ("OLD_DATA_SPACE", 0x082b1): "EmptyExternalFloatArray",
-  ("OLD_DATA_SPACE", 0x082bd): "EmptyExternalDoubleArray",
-  ("OLD_DATA_SPACE", 0x082c9): "EmptyExternalPixelArray",
-  ("OLD_DATA_SPACE", 0x082d5): "InfinityValue",
-  ("OLD_DATA_SPACE", 0x082e1): "MinusZeroValue",
-  ("CODE_SPACE", 0x111a1): "JsConstructEntryCode",
-  ("CODE_SPACE", 0x18bc1): "JsEntryCode",
+  ("OLD_DATA_SPACE", 0x08279): "EmptyExternalByteArray",
+  ("OLD_DATA_SPACE", 0x08285): "EmptyExternalUnsignedByteArray",
+  ("OLD_DATA_SPACE", 0x08291): "EmptyExternalShortArray",
+  ("OLD_DATA_SPACE", 0x0829d): "EmptyExternalUnsignedShortArray",
+  ("OLD_DATA_SPACE", 0x082a9): "EmptyExternalIntArray",
+  ("OLD_DATA_SPACE", 0x082b5): "EmptyExternalUnsignedIntArray",
+  ("OLD_DATA_SPACE", 0x082c1): "EmptyExternalFloatArray",
+  ("OLD_DATA_SPACE", 0x082cd): "EmptyExternalDoubleArray",
+  ("OLD_DATA_SPACE", 0x082d9): "EmptyExternalPixelArray",
+  ("OLD_DATA_SPACE", 0x082e5): "InfinityValue",
+  ("OLD_DATA_SPACE", 0x082f1): "MinusZeroValue",
+  ("CODE_SPACE", 0x14181): "JsConstructEntryCode",
+  ("CODE_SPACE", 0x15c61): "JsEntryCode",
 }