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// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// The common functionality when building with or without snapshots.
#include "v8.h"
#include "api.h"
#include "serialize.h"
#include "snapshot.h"
#include "platform.h"
namespace v8 {
namespace internal {
static void ReserveSpaceForSnapshot(Deserializer* deserializer,
const char* file_name) {
int file_name_length = StrLength(file_name) + 10;
Vector<char> name = Vector<char>::New(file_name_length + 1);
OS::SNPrintF(name, "%s.size", file_name);
FILE* fp = OS::FOpen(name.start(), "r");
CHECK_NE(NULL, fp);
int new_size, pointer_size, data_size, code_size, map_size, cell_size;
#ifdef _MSC_VER
// Avoid warning about unsafe fscanf from MSVC.
// Please note that this is only fine if %c and %s are not being used.
#define fscanf fscanf_s
#endif
CHECK_EQ(1, fscanf(fp, "new %d\n", &new_size));
CHECK_EQ(1, fscanf(fp, "pointer %d\n", &pointer_size));
CHECK_EQ(1, fscanf(fp, "data %d\n", &data_size));
CHECK_EQ(1, fscanf(fp, "code %d\n", &code_size));
CHECK_EQ(1, fscanf(fp, "map %d\n", &map_size));
CHECK_EQ(1, fscanf(fp, "cell %d\n", &cell_size));
#ifdef _MSC_VER
#undef fscanf
#endif
fclose(fp);
deserializer->set_reservation(NEW_SPACE, new_size);
deserializer->set_reservation(OLD_POINTER_SPACE, pointer_size);
deserializer->set_reservation(OLD_DATA_SPACE, data_size);
deserializer->set_reservation(CODE_SPACE, code_size);
deserializer->set_reservation(MAP_SPACE, map_size);
deserializer->set_reservation(CELL_SPACE, cell_size);
name.Dispose();
}
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_);
}
bool Snapshot::Initialize(const char* snapshot_file) {
if (snapshot_file) {
int len;
byte* str = ReadBytes(snapshot_file, &len);
if (!str) return false;
bool success;
{
SnapshotByteSource source(str, len);
Deserializer deserializer(&source);
ReserveSpaceForSnapshot(&deserializer, snapshot_file);
success = V8::Initialize(&deserializer);
}
DeleteArray(str);
return success;
} else if (size_ > 0) {
SnapshotByteSource source(raw_data_, raw_size_);
Deserializer deserializer(&source);
ReserveSpaceForLinkedInSnapshot(&deserializer);
return V8::Initialize(&deserializer);
}
return false;
}
bool Snapshot::HaveASnapshotToStartFrom() {
return size_ != 0;
}
Handle<Context> Snapshot::NewContextFromSnapshot() {
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.DeserializePartial(&root);
CHECK(root->IsContext());
return Handle<Context>(Context::cast(root));
}
} } // namespace v8::internal
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