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// 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.set_reservation(NEW_SPACE, snapshot_impl_->new_space_used);
deserializer.set_reservation(OLD_POINTER_SPACE,
snapshot_impl_->pointer_space_used);
deserializer.set_reservation(OLD_DATA_SPACE,
snapshot_impl_->data_space_used);
deserializer.set_reservation(CODE_SPACE, snapshot_impl_->code_space_used);
deserializer.set_reservation(MAP_SPACE, snapshot_impl_->map_space_used);
deserializer.set_reservation(CELL_SPACE, snapshot_impl_->cell_space_used);
deserializer.set_reservation(PROPERTY_CELL_SPACE,
snapshot_impl_->property_cell_space_used);
deserializer.set_reservation(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.set_reservation(NEW_SPACE,
snapshot_impl_->context_new_space_used);
deserializer.set_reservation(OLD_POINTER_SPACE,
snapshot_impl_->context_pointer_space_used);
deserializer.set_reservation(OLD_DATA_SPACE,
snapshot_impl_->context_data_space_used);
deserializer.set_reservation(CODE_SPACE,
snapshot_impl_->context_code_space_used);
deserializer.set_reservation(MAP_SPACE,
snapshot_impl_->context_map_space_used);
deserializer.set_reservation(CELL_SPACE,
snapshot_impl_->context_cell_space_used);
deserializer.set_reservation(PROPERTY_CELL_SPACE,
snapshot_impl_->
context_property_cell_space_used);
deserializer.set_reservation(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();
DCHECK(success);
}
} } // namespace v8::internal
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