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 31 namespace v8 { 32 namespace internal { 33 34 class 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
