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#ifndef V8_SNAPSHOT_H_ 29#define V8_SNAPSHOT_H_ 30 31namespace v8 { 32namespace internal { 33 34class Snapshot { 35 public: 36 // Initialize the VM from the given snapshot file. If snapshot_file is 37 // NULL, use the internal snapshot instead. Returns false if no snapshot 38 // could be found. 39 static bool Initialize(const char* snapshot_file = NULL); 40 41 // Create a new context using the internal partial snapshot. 42 static Handle<Context> NewContextFromSnapshot(); 43 44 // Returns whether or not the snapshot is enabled. 45 static bool IsEnabled() { return size_ != 0; } 46 47 // Write snapshot to the given file. Returns true if snapshot was written 48 // successfully. 49 static bool WriteToFile(const char* snapshot_file); 50 51 private: 52 static const byte data_[]; 53 static const byte context_data_[]; 54 static const int new_space_used_; 55 static const int pointer_space_used_; 56 static const int data_space_used_; 57 static const int code_space_used_; 58 static const int map_space_used_; 59 static const int cell_space_used_; 60 static const int large_space_used_; 61 static const int size_; 62 static const int context_size_; 63 64 static bool Deserialize(const byte* content, int len); 65 66 DISALLOW_IMPLICIT_CONSTRUCTORS(Snapshot); 67}; 68 69} } // namespace v8::internal 70 71#endif // V8_SNAPSHOT_H_ 72