Verify that source string matches serialized code.

src/serialize.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SERIALIZE_H_
 #define V8_SERIALIZE_H_
 
 #include "src/compiler.h"
 #include "src/hashmap.h"
 #include "src/heap-profiler.h"
@@ skipping 572 matching lines @@
 
   virtual void SerializeObject(Object* o, HowToCode how_to_code,
                                WhereToPoint where_to_point, int skip);
 
   static Handle<SharedFunctionInfo> Deserialize(Isolate* isolate,
                                                 ScriptData* data,
                                                 Handle<String> source);
 
   static const int kSourceObjectIndex = 0;
 
+  String* source() {
+    ASSERT(!AllowHeapAllocation::IsAllowed());
+    return source_;
+  }
+
  private:
   void SerializeBuiltin(Code* builtin, HowToCode how_to_code,
                         WhereToPoint where_to_point, int skip);
   void SerializeSourceObject(HowToCode how_to_code, WhereToPoint where_to_point,
                              int skip);
 
   DisallowHeapAllocation no_gc_;
   String* source_;
   DISALLOW_COPY_AND_ASSIGN(CodeSerializer);
 };
 
 
 // Wrapper around ScriptData to provide code-serializer-specific functionality.
 class SerializedCodeData {
  public:
   // Used by when consuming.
-  explicit SerializedCodeData(ScriptData* data)
+  explicit SerializedCodeData(ScriptData* data, String* source)
       : script_data_(data), owns_script_data_(false) {
-    CHECK(IsSane());
+    DisallowHeapAllocation no_gc;
+    CHECK(IsSane(source));
   }
 
   // Used when producing.
   SerializedCodeData(List<byte>* payload, CodeSerializer* cs);
 
   ~SerializedCodeData() {
     if (owns_script_data_) delete script_data_;
   }
 
   // Return ScriptData object and relinquish ownership over it to the caller.
@@ skipping 20 matching lines @@
  private:
   void SetHeaderValue(int offset, int value) {
     reinterpret_cast<int*>(const_cast<byte*>(script_data_->data()))[offset] =
         value;
   }
 
   int GetHeaderValue(int offset) const {
     return reinterpret_cast<const int*>(script_data_->data())[offset];
   }
 
-  bool IsSane();
+  bool IsSane(String* source);
+
+  int CheckSum(String* source);
 
   // The data header consists of int-sized entries:
   // [0] version hash
   // [1..7] reservation sizes for spaces from NEW_SPACE to PROPERTY_CELL_SPACE.
-  static const int kVersionHashOffset = 0;
+  static const int kCheckSumOffset = 0;
   static const int kReservationsOffset = 1;
   static const int kHeaderEntries = 8;
 
   ScriptData* script_data_;
   bool owns_script_data_;
 };
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_