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 33namespace v8 { 34namespace internal { 35 36class 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(); 47 48 // Returns whether or not the snapshot is enabled. 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 55 static const byte* data() { return data_; } 56 static int size() { return size_; } 57 static int raw_size() { return raw_size_; } 58 static void set_raw_data(const byte* raw_data) { 59 raw_data_ = raw_data; 60 } 61 static const byte* context_data() { return context_data_; } 62 static int context_size() { return context_size_; } 63 static int context_raw_size() { return context_raw_size_; } 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