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Issue 328693003: Revert "Support external startup data in V8." (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Fix brace. Created 6 years, 6 months ago
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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 // Used for building with external snapshots.
6
7 #include "src/snapshot.h"
8
9 #include "src/v8.h" // for V8::Initialize
10 #include "src/serialize.h"
11 #include "src/snapshot-source-sink.h"
12
13 namespace v8 {
14 namespace internal {
15
16
17 struct SnapshotImpl {
18 public:
19 const byte* data;
20 int size;
21 int new_space_used;
22 int pointer_space_used;
23 int data_space_used;
24 int code_space_used;
25 int map_space_used;
26 int cell_space_used;
27 int property_cell_space_used;
28
29 const byte* context_data;
30 int context_size;
31 int context_new_space_used;
32 int context_pointer_space_used;
33 int context_data_space_used;
34 int context_code_space_used;
35 int context_map_space_used;
36 int context_cell_space_used;
37 int context_property_cell_space_used;
38 };
39
40
41 static SnapshotImpl* snapshot_impl_ = NULL;
42
43
44 bool Snapshot::HaveASnapshotToStartFrom() {
45 return snapshot_impl_ != NULL;
46 }
47
48
49 bool Snapshot::Initialize() {
50 if (!HaveASnapshotToStartFrom())
51 return false;
52
53 ElapsedTimer timer;
54 if (FLAG_profile_deserialization) {
55 timer.Start();
56 }
57 SnapshotByteSource source(snapshot_impl_->data, snapshot_impl_->size);
58 Deserializer deserializer(&source);
59 deserializer.set_reservation(NEW_SPACE, snapshot_impl_->new_space_used);
60 deserializer.set_reservation(OLD_POINTER_SPACE,
61 snapshot_impl_->pointer_space_used);
62 deserializer.set_reservation(OLD_DATA_SPACE,
63 snapshot_impl_->data_space_used);
64 deserializer.set_reservation(CODE_SPACE, snapshot_impl_->code_space_used);
65 deserializer.set_reservation(MAP_SPACE, snapshot_impl_->map_space_used);
66 deserializer.set_reservation(CELL_SPACE, snapshot_impl_->cell_space_used);
67 deserializer.set_reservation(PROPERTY_CELL_SPACE,
68 snapshot_impl_->property_cell_space_used);
69 bool success = V8::Initialize(&deserializer);
70 if (FLAG_profile_deserialization) {
71 double ms = timer.Elapsed().InMillisecondsF();
72 PrintF("[Snapshot loading and deserialization took %0.3f ms]\n", ms);
73 }
74 return success;
75 }
76
77
78 Handle<Context> Snapshot::NewContextFromSnapshot(Isolate* isolate) {
79 if (!HaveASnapshotToStartFrom())
80 return Handle<Context>();
81
82 SnapshotByteSource source(snapshot_impl_->context_data,
83 snapshot_impl_->context_size);
84 Deserializer deserializer(&source);
85 deserializer.set_reservation(NEW_SPACE,
86 snapshot_impl_->context_new_space_used);
87 deserializer.set_reservation(OLD_POINTER_SPACE,
88 snapshot_impl_->context_pointer_space_used);
89 deserializer.set_reservation(OLD_DATA_SPACE,
90 snapshot_impl_->context_data_space_used);
91 deserializer.set_reservation(CODE_SPACE,
92 snapshot_impl_->context_code_space_used);
93 deserializer.set_reservation(MAP_SPACE,
94 snapshot_impl_->context_map_space_used);
95 deserializer.set_reservation(CELL_SPACE,
96 snapshot_impl_->context_cell_space_used);
97 deserializer.set_reservation(PROPERTY_CELL_SPACE,
98 snapshot_impl_->
99 context_property_cell_space_used);
100 Object* root;
101 deserializer.DeserializePartial(isolate, &root);
102 CHECK(root->IsContext());
103 return Handle<Context>(Context::cast(root));
104 }
105
106
107 void SetSnapshotFromFile(StartupData* snapshot_blob) {
108 ASSERT(snapshot_blob);
109 ASSERT(snapshot_blob->data);
110 ASSERT(snapshot_blob->raw_size > 0);
111 ASSERT(!snapshot_impl_);
112
113 snapshot_impl_ = new SnapshotImpl;
114 SnapshotByteSource source(reinterpret_cast<const byte*>(snapshot_blob->data),
115 snapshot_blob->raw_size);
116
117 bool success = source.GetBlob(&snapshot_impl_->data,
118 &snapshot_impl_->size);
119 snapshot_impl_->new_space_used = source.GetInt();
120 snapshot_impl_->pointer_space_used = source.GetInt();
121 snapshot_impl_->data_space_used = source.GetInt();
122 snapshot_impl_->code_space_used = source.GetInt();
123 snapshot_impl_->map_space_used = source.GetInt();
124 snapshot_impl_->cell_space_used = source.GetInt();
125 snapshot_impl_->property_cell_space_used = source.GetInt();
126
127 success &= source.GetBlob(&snapshot_impl_->context_data,
128 &snapshot_impl_->context_size);
129 snapshot_impl_->context_new_space_used = source.GetInt();
130 snapshot_impl_->context_pointer_space_used = source.GetInt();
131 snapshot_impl_->context_data_space_used = source.GetInt();
132 snapshot_impl_->context_code_space_used = source.GetInt();
133 snapshot_impl_->context_map_space_used = source.GetInt();
134 snapshot_impl_->context_cell_space_used = source.GetInt();
135 snapshot_impl_->context_property_cell_space_used = source.GetInt();
136
137 ASSERT(success);
138 }
139
140 } } // namespace v8::internal
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