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
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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
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26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// The common functionality when building with or without snapshots.
29
30#include "v8.h"
31
32#include "api.h"
33#include "serialize.h"
34#include "snapshot.h"
35#include "platform.h"
36
37namespace v8 {
38namespace internal {
39
40bool Snapshot::Deserialize(const byte* content, int len) {
41  SnapshotByteSource source(content, len);
42  Deserializer deserializer(&source);
43  return V8::Initialize(&deserializer);
44}
45
46
47bool Snapshot::Initialize(const char* snapshot_file) {
48  if (snapshot_file) {
49    int len;
50    byte* str = ReadBytes(snapshot_file, &len);
51    if (!str) return false;
52    Deserialize(str, len);
53    DeleteArray(str);
54    return true;
55  } else if (size_ > 0) {
56    Deserialize(raw_data_, raw_size_);
57    return true;
58  }
59  return false;
60}
61
62
63Handle<Context> Snapshot::NewContextFromSnapshot() {
64  if (context_size_ == 0) {
65    return Handle<Context>();
66  }
67  HEAP->ReserveSpace(new_space_used_,
68                     pointer_space_used_,
69                     data_space_used_,
70                     code_space_used_,
71                     map_space_used_,
72                     cell_space_used_,
73                     large_space_used_);
74  SnapshotByteSource source(context_raw_data_,
75                            context_raw_size_);
76  Deserializer deserializer(&source);
77  Object* root;
78  deserializer.DeserializePartial(&root);
79  CHECK(root->IsContext());
80  return Handle<Context>(Context::cast(root));
81}
82
83} }  // namespace v8::internal
84