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// Copyright 2017 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.
#include "src/snapshot/builtin-serializer-allocator.h"
#include "src/heap/heap-inl.h"
namespace v8 {
namespace internal {
SerializerReference BuiltinSerializerAllocator::Allocate(AllocationSpace space,
uint32_t size) {
DCHECK_EQ(space, CODE_SPACE);
DCHECK_GT(size, 0);
// Builtin serialization & deserialization does not use the reservation
// system. Instead of worrying about chunk indices and offsets, we simply
// need to generate unique offsets here.
const uint32_t virtual_chunk_index = 0;
const auto ref = SerializerReference::BackReference(
CODE_SPACE, virtual_chunk_index, virtual_chunk_offset_);
virtual_chunk_size_ += size;
virtual_chunk_offset_ += kObjectAlignment; // Needs to be aligned.
return ref;
}
#ifdef DEBUG
bool BuiltinSerializerAllocator::BackReferenceIsAlreadyAllocated(
SerializerReference reference) const {
DCHECK(reference.is_back_reference());
AllocationSpace space = reference.space();
DCHECK_EQ(space, CODE_SPACE);
DCHECK_EQ(reference.chunk_index(), 0);
return reference.chunk_offset() < virtual_chunk_offset_;
}
#endif // DEBUG
std::vector<SerializedData::Reservation>
BuiltinSerializerAllocator::EncodeReservations() const {
return std::vector<SerializedData::Reservation>();
}
void BuiltinSerializerAllocator::OutputStatistics() {
DCHECK(FLAG_serialization_statistics);
PrintF(" Spaces (bytes):\n");
for (int space = FIRST_SPACE; space < kNumberOfSpaces; space++) {
PrintF("%16s", AllocationSpaceName(static_cast<AllocationSpace>(space)));
}
PrintF("\n");
for (int space = FIRST_SPACE; space < kNumberOfSpaces; space++) {
uint32_t space_size = (space == CODE_SPACE) ? virtual_chunk_size_ : 0;
PrintF("%16d", space_size);
}
PrintF("\n");
}
} // namespace internal
} // namespace v8
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