Make snapshots reproducible.

src/objects-inl.h

 // 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.
 //     * 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 5304 matching lines @@
 }
 
 
 INT_ACCESSORS(Code, instruction_size, kInstructionSizeOffset)
 INT_ACCESSORS(Code, prologue_offset, kPrologueOffset)
 ACCESSORS(Code, relocation_info, ByteArray, kRelocationInfoOffset)
 ACCESSORS(Code, handler_table, FixedArray, kHandlerTableOffset)
 ACCESSORS(Code, deoptimization_data, FixedArray, kDeoptimizationDataOffset)
 
 
+void Code::WipeOutHeader() {
+  WRITE_FIELD(this, kRelocationInfoOffset, NULL);
+  WRITE_FIELD(this, kHandlerTableOffset, NULL);
+  WRITE_FIELD(this, kDeoptimizationDataOffset, NULL);
+  // Do not wipe out e.g. a minor key.
+  if (!READ_FIELD(this, kTypeFeedbackInfoOffset)->IsSmi()) {
+    WRITE_FIELD(this, kTypeFeedbackInfoOffset, NULL);
+  }
+}
+
+
 // Type feedback slot: type_feedback_info for FUNCTIONs, stub_info for STUBs.
 void Code::InitializeTypeFeedbackInfoNoWriteBarrier(Object* value) {
   WRITE_FIELD(this, kTypeFeedbackInfoOffset, value);
 }
 
 
 Object* Code::type_feedback_info() {
   ASSERT(kind() == FUNCTION);
   return Object::cast(READ_FIELD(this, kTypeFeedbackInfoOffset));
 }
@@ skipping 1065 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_