Add additional postmortem debugging metadata

tools/gen-postmortem-metadata.py

 #!/usr/bin/env python
 
 #
 # Copyright 2012 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.
@@ skipping 50 matching lines @@
 
     { 'name': 'StringEncodingMask',     'value': 'kStringEncodingMask' },
     { 'name': 'TwoByteStringTag',       'value': 'kTwoByteStringTag' },
     { 'name': 'AsciiStringTag',         'value': 'kOneByteStringTag' },
 
     { 'name': 'StringRepresentationMask',
         'value': 'kStringRepresentationMask' },
     { 'name': 'SeqStringTag',           'value': 'kSeqStringTag' },
     { 'name': 'ConsStringTag',          'value': 'kConsStringTag' },
     { 'name': 'ExternalStringTag',      'value': 'kExternalStringTag' },
+    { 'name': 'SlicedStringTag',        'value': 'kSlicedStringTag' },
 
     { 'name': 'FailureTag',             'value': 'kFailureTag' },
     { 'name': 'FailureTagMask',         'value': 'kFailureTagMask' },
     { 'name': 'HeapObjectTag',          'value': 'kHeapObjectTag' },
     { 'name': 'HeapObjectTagMask',      'value': 'kHeapObjectTagMask' },
     { 'name': 'SmiTag',                 'value': 'kSmiTag' },
     { 'name': 'SmiTagMask',             'value': 'kSmiTagMask' },
     { 'name': 'SmiValueShift',          'value': 'kSmiTagSize' },
     { 'name': 'SmiShiftSize',           'value': 'kSmiShiftSize' },
     { 'name': 'PointerSizeLog2',        'value': 'kPointerSizeLog2' },
 
     { 'name': 'prop_idx_first',
         'value': 'DescriptorArray::kFirstIndex' },
     { 'name': 'prop_type_field',
         'value': 'FIELD' },
     { 'name': 'prop_type_first_phantom',
         'value': 'TRANSITION' },
     { 'name': 'prop_type_mask',
         'value': 'PropertyDetails::TypeField::kMask' },
 
+    { 'name': 'prop_desc_key',
+        'value': 'DescriptorArray::kDescriptorKey' },
+    { 'name': 'prop_desc_details',
+        'value': 'DescriptorArray::kDescriptorDetails' },
+    { 'name': 'prop_desc_value',
+        'value': 'DescriptorArray::kDescriptorValue' },
+    { 'name': 'prop_desc_size',
+        'value': 'DescriptorArray::kDescriptorSize' },
+
     { 'name': 'off_fp_context',
         'value': 'StandardFrameConstants::kContextOffset' },
     { 'name': 'off_fp_marker',
         'value': 'StandardFrameConstants::kMarkerOffset' },
     { 'name': 'off_fp_function',
         'value': 'JavaScriptFrameConstants::kFunctionOffset' },
     { 'name': 'off_fp_args',
         'value': 'JavaScriptFrameConstants::kLastParameterOffset' },
 ];
 
 #
 # The following useful fields are missing accessors, so we define fake ones.
 #
 extras_accessors = [
     'HeapObject, map, Map, kMapOffset',
     'JSObject, elements, Object, kElementsOffset',
     'FixedArray, data, uintptr_t, kHeaderSize',
     'Map, instance_attributes, int, kInstanceAttributesOffset',
     'Map, inobject_properties, int, kInObjectPropertiesOffset',
     'Map, instance_size, int, kInstanceSizeOffset',
     'HeapNumber, value, double, kValueOffset',
     'ConsString, first, String, kFirstOffset',
     'ConsString, second, String, kSecondOffset',
     'ExternalString, resource, Object, kResourceOffset',
     'SeqOneByteString, chars, char, kHeaderSize',
+    'SeqTwoByteString, chars, char, kHeaderSize',
     'SharedFunctionInfo, code, Code, kCodeOffset',
+    'SlicedString, parent, String, kParentOffset',
     'Code, instruction_start, uintptr_t, kHeaderSize',
     'Code, instruction_size, int, kInstructionSizeOffset',
 ];
 
 #
 # The following is a whitelist of classes we expect to find when scanning the
 # source code. This list is not exhaustive, but it's still useful to identify
 # when this script gets out of sync with the source. See load_objects().
 #
 expected_classes = [
@@ skipping 343 matching lines @@
 
         out.write(footer);
 
 if (len(sys.argv) < 4):
         print('usage: %s output.cc objects.h objects-inl.h' % sys.argv[0]);
         sys.exit(2);
 
 load_objects();
 load_fields();
 emit_config();