1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/isolate.h" 6 7 #ifndef V8_SNAPSHOT_H_ 8 #define V8_SNAPSHOT_H_ 9 10 namespace v8 { 11 namespace internal { 12 13 class Snapshot { 14 public: 15 // Initialize the VM from the given snapshot file. If snapshot_file is 16 // NULL, use the internal snapshot instead. Returns false if no snapshot 17 // could be found. 18 static bool Initialize(const char* snapshot_file = NULL); 19 20 static bool HaveASnapshotToStartFrom(); 21 22 // Create a new context using the internal partial snapshot. 23 static Handle<Context> NewContextFromSnapshot(Isolate* isolate); 24 25 // Returns whether or not the snapshot is enabled. 26 static bool IsEnabled() { return size_ != 0; } 27 28 // Write snapshot to the given file. Returns true if snapshot was written 29 // successfully. 30 static bool WriteToFile(const char* snapshot_file); 31 32 static const byte* data() { return data_; } 33 static int size() { return size_; } 34 static int raw_size() { return raw_size_; } 35 static void set_raw_data(const byte* raw_data) { 36 raw_data_ = raw_data; 37 } 38 static const byte* context_data() { return context_data_; } 39 static int context_size() { return context_size_; } 40 static int context_raw_size() { return context_raw_size_; } 41 static void set_context_raw_data( 42 const byte* context_raw_data) { 43 context_raw_data_ = context_raw_data; 44 } 45 46 private: 47 static const byte data_[]; 48 static const byte* raw_data_; 49 static const byte context_data_[]; 50 static const byte* context_raw_data_; 51 static const int new_space_used_; 52 static const int pointer_space_used_; 53 static const int data_space_used_; 54 static const int code_space_used_; 55 static const int map_space_used_; 56 static const int cell_space_used_; 57 static const int property_cell_space_used_; 58 static const int context_new_space_used_; 59 static const int context_pointer_space_used_; 60 static const int context_data_space_used_; 61 static const int context_code_space_used_; 62 static const int context_map_space_used_; 63 static const int context_cell_space_used_; 64 static const int context_property_cell_space_used_; 65 static const int size_; 66 static const int raw_size_; 67 static const int context_size_; 68 static const int context_raw_size_; 69 70 static void ReserveSpaceForLinkedInSnapshot(Deserializer* deserializer); 71 72 DISALLOW_IMPLICIT_CONSTRUCTORS(Snapshot); 73 }; 74 75 } } // namespace v8::internal 76 77 #endif // V8_SNAPSHOT_H_ 78
