Partially fix serializer which crashes on x64 running with no snapshot....

src/serialize.cc

 // Copyright 2006-2008 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 704 matching lines @@
                               Object** write_back) {
   int size = source_->GetInt() << kObjectAlignmentBits;
   Address address = Allocate(space_number, space, size);
   *write_back = HeapObject::FromAddress(address);
   Object** current = reinterpret_cast<Object**>(address);
   Object** limit = current + (size >> kPointerSizeLog2);
   if (FLAG_log_snapshot_positions) {
     LOG(SnapshotPositionEvent(address, source_->position()));
   }
   ReadChunk(current, limit, space_number, address);
+#ifdef DEBUG
+  bool is_codespace = (space == Heap::code_space()) ||
+      ((space == Heap::lo_space()) && (space_number == kLargeCode));
+  ASSERT(HeapObject::FromAddress(address)->IsCode() == is_codespace);
+#endif
 }
 
 
 // This macro is always used with a constant argument so it should all fold
 // away to almost nothing in the generated code.  It might be nicer to do this
 // with the ternary operator but there are type issues with that.
 #define ASSIGN_DEST_SPACE(space_number)                                        \
   Space* dest_space;                                                           \
   if (space_number == NEW_SPACE) {                                             \
     dest_space = Heap::new_space();                                            \
@@ skipping 135 matching lines @@
   CASE_STATEMENT(where, how, within, MAP_SPACE)                                \
   CASE_STATEMENT(where, how, within, kLargeData)                               \
   CASE_STATEMENT(where, how, within, kLargeCode)                               \
   CASE_STATEMENT(where, how, within, kLargeFixedArray)                         \
   CASE_BODY(where, how, within, kAnyOldSpace, kUnknownOffsetFromStart)
 
 #define ONE_PER_CODE_SPACE(where, how, within)                                 \
   CASE_STATEMENT(where, how, within, CODE_SPACE)                               \
   CASE_BODY(where, how, within, CODE_SPACE, kUnknownOffsetFromStart)           \
   CASE_STATEMENT(where, how, within, kLargeCode)                               \
-  CASE_BODY(where, how, within, LO_SPACE, kUnknownOffsetFromStart)
+  CASE_BODY(where, how, within, kLargeCode, kUnknownOffsetFromStart)
 
 #define EMIT_COMMON_REFERENCE_PATTERNS(pseudo_space_number,                    \
                                        space_number,                           \
                                        offset_from_start)                      \
   CASE_STATEMENT(kFromStart, kPlain, kStartOfObject, pseudo_space_number)      \
   CASE_BODY(kFromStart, kPlain, kStartOfObject, space_number, offset_from_start)
 
       // We generate 15 cases and bodies that process special tags that combine
       // the raw data tag and the length into one byte.
 #define RAW_CASE(index, size)                                      \
@@ skipping 634 matching lines @@
       fullness_[space] = RoundUp(fullness_[space], Page::kPageSize);
     }
   }
   int allocation_address = fullness_[space];
   fullness_[space] = allocation_address + size;
   return allocation_address;
 }
 
 
 } }  // namespace v8::internal