| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Used for building with external snapshots. |
| |
| #include "src/snapshot.h" |
| |
| #include "src/serialize.h" |
| #include "src/snapshot-source-sink.h" |
| #include "src/v8.h" // for V8::Initialize |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| struct SnapshotImpl { |
| public: |
| const byte* data; |
| int size; |
| int new_space_used; |
| int pointer_space_used; |
| int data_space_used; |
| int code_space_used; |
| int map_space_used; |
| int cell_space_used; |
| int property_cell_space_used; |
| int lo_space_used; |
| |
| const byte* context_data; |
| int context_size; |
| int context_new_space_used; |
| int context_pointer_space_used; |
| int context_data_space_used; |
| int context_code_space_used; |
| int context_map_space_used; |
| int context_cell_space_used; |
| int context_property_cell_space_used; |
| int context_lo_space_used; |
| }; |
| |
| |
| static SnapshotImpl* snapshot_impl_ = NULL; |
| |
| |
| bool Snapshot::HaveASnapshotToStartFrom() { |
| return snapshot_impl_ != NULL; |
| } |
| |
| |
| bool Snapshot::Initialize(Isolate* isolate) { |
| if (!HaveASnapshotToStartFrom()) |
| return false; |
| |
| base::ElapsedTimer timer; |
| if (FLAG_profile_deserialization) { |
| timer.Start(); |
| } |
| SnapshotByteSource source(snapshot_impl_->data, snapshot_impl_->size); |
| Deserializer deserializer(&source); |
| deserializer.AddReservation(NEW_SPACE, snapshot_impl_->new_space_used); |
| deserializer.AddReservation(OLD_POINTER_SPACE, |
| snapshot_impl_->pointer_space_used); |
| deserializer.AddReservation(OLD_DATA_SPACE, snapshot_impl_->data_space_used); |
| deserializer.AddReservation(CODE_SPACE, snapshot_impl_->code_space_used); |
| deserializer.AddReservation(MAP_SPACE, snapshot_impl_->map_space_used); |
| deserializer.AddReservation(CELL_SPACE, snapshot_impl_->cell_space_used); |
| deserializer.AddReservation(PROPERTY_CELL_SPACE, |
| snapshot_impl_->property_cell_space_used); |
| deserializer.AddReservation(LO_SPACE, snapshot_impl_->lo_space_used); |
| bool success = isolate->Init(&deserializer); |
| if (FLAG_profile_deserialization) { |
| double ms = timer.Elapsed().InMillisecondsF(); |
| PrintF("[Snapshot loading and deserialization took %0.3f ms]\n", ms); |
| } |
| return success; |
| } |
| |
| |
| Handle<Context> Snapshot::NewContextFromSnapshot(Isolate* isolate) { |
| if (!HaveASnapshotToStartFrom()) |
| return Handle<Context>(); |
| |
| SnapshotByteSource source(snapshot_impl_->context_data, |
| snapshot_impl_->context_size); |
| Deserializer deserializer(&source); |
| deserializer.AddReservation(NEW_SPACE, |
| snapshot_impl_->context_new_space_used); |
| deserializer.AddReservation(OLD_POINTER_SPACE, |
| snapshot_impl_->context_pointer_space_used); |
| deserializer.AddReservation(OLD_DATA_SPACE, |
| snapshot_impl_->context_data_space_used); |
| deserializer.AddReservation(CODE_SPACE, |
| snapshot_impl_->context_code_space_used); |
| deserializer.AddReservation(MAP_SPACE, |
| snapshot_impl_->context_map_space_used); |
| deserializer.AddReservation(CELL_SPACE, |
| snapshot_impl_->context_cell_space_used); |
| deserializer.AddReservation(PROPERTY_CELL_SPACE, |
| snapshot_impl_->context_property_cell_space_used); |
| deserializer.AddReservation(LO_SPACE, snapshot_impl_->context_lo_space_used); |
| Object* root; |
| deserializer.DeserializePartial(isolate, &root); |
| CHECK(root->IsContext()); |
| return Handle<Context>(Context::cast(root)); |
| } |
| |
| |
| void SetSnapshotFromFile(StartupData* snapshot_blob) { |
| DCHECK(snapshot_blob); |
| DCHECK(snapshot_blob->data); |
| DCHECK(snapshot_blob->raw_size > 0); |
| DCHECK(!snapshot_impl_); |
| |
| snapshot_impl_ = new SnapshotImpl; |
| SnapshotByteSource source(reinterpret_cast<const byte*>(snapshot_blob->data), |
| snapshot_blob->raw_size); |
| |
| bool success = source.GetBlob(&snapshot_impl_->data, |
| &snapshot_impl_->size); |
| snapshot_impl_->new_space_used = source.GetInt(); |
| snapshot_impl_->pointer_space_used = source.GetInt(); |
| snapshot_impl_->data_space_used = source.GetInt(); |
| snapshot_impl_->code_space_used = source.GetInt(); |
| snapshot_impl_->map_space_used = source.GetInt(); |
| snapshot_impl_->cell_space_used = source.GetInt(); |
| snapshot_impl_->property_cell_space_used = source.GetInt(); |
| snapshot_impl_->lo_space_used = source.GetInt(); |
| |
| success &= source.GetBlob(&snapshot_impl_->context_data, |
| &snapshot_impl_->context_size); |
| snapshot_impl_->context_new_space_used = source.GetInt(); |
| snapshot_impl_->context_pointer_space_used = source.GetInt(); |
| snapshot_impl_->context_data_space_used = source.GetInt(); |
| snapshot_impl_->context_code_space_used = source.GetInt(); |
| snapshot_impl_->context_map_space_used = source.GetInt(); |
| snapshot_impl_->context_cell_space_used = source.GetInt(); |
| snapshot_impl_->context_property_cell_space_used = source.GetInt(); |
| snapshot_impl_->context_lo_space_used = source.GetInt(); |
| |
| DCHECK(success); |
| } |
| |
| } } // namespace v8::internal |