gen-postmortem-metadata.py: fix code generator

tools/gen-postmortem-metadata.py

Index: tools/gen-postmortem-metadata.py
diff --git a/tools/gen-postmortem-metadata.py b/tools/gen-postmortem-metadata.py
index f59cfd3033c6f04503a3513c233296498ffd4be7..355b76bdd433a1f2f03b40754a90807975768bb8 100644
--- a/tools/gen-postmortem-metadata.py
+++ b/tools/gen-postmortem-metadata.py
@@ -78,14 +78,17 @@ consts_misc = [
     { 'name': 'SmiValueShift',          'value': 'kSmiTagSize' },
     { 'name': 'PointerSizeLog2',        'value': 'kPointerSizeLog2' },
 
-    { 'name': 'prop_idx_transitions',
-        'value': 'DescriptorArray::kTransitionsIndex' },
+    { 'name': 'prop_idx_elements_transitions',
+        'value': 'TransitionArray::kElementsTransitionIndex' },
+    { 'name': 'prop_idx_prototype_transitions',
+        'value': 'TransitionArray::kPrototypeTransitionsIndex' },
     { 'name': 'prop_idx_first',
-        'value': 'DescriptorArray::kFirstIndex' },
+        'value': 'TransitionArray::kFirstIndex' },

[Toon Verwaest, 2012/08/21 13:29:46]

All these changes change the semantics of the fields. Is this on purpose? Do we
care about transitions rather than descriptors now?

+
     { 'name': 'prop_type_field',
         'value': 'FIELD' },
     { 'name': 'prop_type_first_phantom',
-        'value': 'MAP_TRANSITION' },
+        'value': 'Code::MAP_TRANSITION' },
     { 'name': 'prop_type_mask',
         'value': 'PropertyDetails::TypeField::kMask' },
 
@@ -107,7 +110,7 @@ extras_accessors = [
     'JSObject, elements, Object, kElementsOffset',
     'FixedArray, data, uintptr_t, kHeaderSize',
     'Map, instance_attributes, int, kInstanceAttributesOffset',
-    'Map, instance_descriptors, int, kInstanceDescriptorsOrBitField3Offset',
+    'Map, instance_descriptors, uintptr_t, kTransitionsOrBackPointerOffset',

[Toon Verwaest, 2012/08/21 13:29:46]

This field does not contain the instance_descriptors but rather either the
transition array or the back pointer. If it contains a transition array, that
array will store the descriptors.

     'Map, inobject_properties, int, kInObjectPropertiesOffset',
     'Map, instance_size, int, kInstanceSizeOffset',
     'HeapNumber, value, double, kValueOffset',