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 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 static bool HaveASnapshotToStartFrom(); 44 45 // Create a new context using the internal partial snapshot. 46 static Handle<Context> NewContextFromSnapshot(Isolate* isolate); 47 48 // Returns whether or not the snapshot is enabled. IsEnabled()49 static bool IsEnabled() { return size_ != 0; } 50 51 // Write snapshot to the given file. Returns true if snapshot was written 52 // successfully. 53 static bool WriteToFile(const char* snapshot_file); 54 data()55 static const byte* data() { return data_; } size()56 static int size() { return size_; } raw_size()57 static int raw_size() { return raw_size_; } set_raw_data(const byte * raw_data)58 static void set_raw_data(const byte* raw_data) { 59 raw_data_ = raw_data; 60 } context_data()61 static const byte* context_data() { return context_data_; } context_size()62 static int context_size() { return context_size_; } context_raw_size()63 static int context_raw_size() { return context_raw_size_; } set_context_raw_data(const byte * context_raw_data)64 static void set_context_raw_data( 65 const byte* context_raw_data) { 66 context_raw_data_ = context_raw_data; 67 } 68 69 private: 70 static const byte data_[]; 71 static const byte* raw_data_; 72 static const byte context_data_[]; 73 static const byte* context_raw_data_; 74 static const int new_space_used_; 75 static const int pointer_space_used_; 76 static const int data_space_used_; 77 static const int code_space_used_; 78 static const int map_space_used_; 79 static const int cell_space_used_; 80 static const int property_cell_space_used_; 81 static const int context_new_space_used_; 82 static const int context_pointer_space_used_; 83 static const int context_data_space_used_; 84 static const int context_code_space_used_; 85 static const int context_map_space_used_; 86 static const int context_cell_space_used_; 87 static const int context_property_cell_space_used_; 88 static const int size_; 89 static const int raw_size_; 90 static const int context_size_; 91 static const int context_raw_size_; 92 93 static void ReserveSpaceForLinkedInSnapshot(Deserializer* deserializer); 94 95 DISALLOW_IMPLICIT_CONSTRUCTORS(Snapshot); 96 }; 97 98 } } // namespace v8::internal 99 100 #endif // V8_SNAPSHOT_H_ 101