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      1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #include "isolate.h"
     29 
     30 #ifndef V8_SNAPSHOT_H_
     31 #define V8_SNAPSHOT_H_
     32 
     33 namespace v8 {
     34 namespace internal {
     35 
     36 STATIC_CLASS Snapshot {
     37  public:
     38   // Initialize the VM from the given snapshot file. If snapshot_file is
     39   // NULL, use the internal snapshot instead. Returns false if no snapshot
     40   // could be found.
     41   static bool Initialize(const char* snapshot_file = NULL);
     42 
     43   // Create a new context using the internal partial snapshot.
     44   static Handle<Context> NewContextFromSnapshot();
     45 
     46   // Returns whether or not the snapshot is enabled.
     47   static bool IsEnabled() { return size_ != 0; }
     48 
     49   // Write snapshot to the given file. Returns true if snapshot was written
     50   // successfully.
     51   static bool WriteToFile(const char* snapshot_file);
     52 
     53  private:
     54   static const byte data_[];
     55   static const byte context_data_[];
     56   static const int new_space_used_;
     57   static const int pointer_space_used_;
     58   static const int data_space_used_;
     59   static const int code_space_used_;
     60   static const int map_space_used_;
     61   static const int cell_space_used_;
     62   static const int large_space_used_;
     63   static const int size_;
     64   static const int context_size_;
     65 
     66   static bool Deserialize(const byte* content, int len);
     67 
     68   DISALLOW_IMPLICIT_CONSTRUCTORS(Snapshot);
     69 };
     70 
     71 } }  // namespace v8::internal
     72 
     73 #endif  // V8_SNAPSHOT_H_
     74