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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.
// The common functionality when building with or without snapshots.
#include "src/v8.h"
#include "src/api.h"
#include "src/base/platform/platform.h"
#include "src/serialize.h"
#include "src/snapshot.h"
namespace v8 {
namespace internal {
void Snapshot::ReserveSpaceForLinkedInSnapshot(Deserializer* deserializer) {
deserializer->set_reservation(NEW_SPACE, new_space_used_);
deserializer->set_reservation(OLD_POINTER_SPACE, pointer_space_used_);
deserializer->set_reservation(OLD_DATA_SPACE, data_space_used_);
deserializer->set_reservation(CODE_SPACE, code_space_used_);
deserializer->set_reservation(MAP_SPACE, map_space_used_);
deserializer->set_reservation(CELL_SPACE, cell_space_used_);
deserializer->set_reservation(PROPERTY_CELL_SPACE, property_cell_space_used_);
deserializer->set_reservation(LO_SPACE, lo_space_used_);
}
bool Snapshot::Initialize(Isolate* isolate) {
if (size_ > 0) {
base::ElapsedTimer timer;
if (FLAG_profile_deserialization) {
timer.Start();
}
SnapshotByteSource source(raw_data_, raw_size_);
Deserializer deserializer(&source);
ReserveSpaceForLinkedInSnapshot(&deserializer);
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;
}
return false;
}
bool Snapshot::HaveASnapshotToStartFrom() {
return size_ != 0;
}
Handle<Context> Snapshot::NewContextFromSnapshot(Isolate* isolate) {
if (context_size_ == 0) {
return Handle<Context>();
}
SnapshotByteSource source(context_raw_data_,
context_raw_size_);
Deserializer deserializer(&source);
Object* root;
deserializer.set_reservation(NEW_SPACE, context_new_space_used_);
deserializer.set_reservation(OLD_POINTER_SPACE, context_pointer_space_used_);
deserializer.set_reservation(OLD_DATA_SPACE, context_data_space_used_);
deserializer.set_reservation(CODE_SPACE, context_code_space_used_);
deserializer.set_reservation(MAP_SPACE, context_map_space_used_);
deserializer.set_reservation(CELL_SPACE, context_cell_space_used_);
deserializer.set_reservation(PROPERTY_CELL_SPACE,
context_property_cell_space_used_);
deserializer.set_reservation(LO_SPACE, context_lo_space_used_);
deserializer.DeserializePartial(isolate, &root);
CHECK(root->IsContext());
return Handle<Context>(Context::cast(root));
}
#ifdef V8_USE_EXTERNAL_STARTUP_DATA
// Dummy implementations of Set*FromFile(..) APIs.
//
// These are meant for use with snapshot-external.cc. Should this file
// be compiled with those options we just supply these dummy implementations
// below. This happens when compiling the mksnapshot utility.
void SetNativesFromFile(StartupData* data) { CHECK(false); }
void SetSnapshotFromFile(StartupData* data) { CHECK(false); }
#endif // V8_USE_EXTERNAL_STARTUP_DATA
} } // namespace v8::internal
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