Line data    Source code

       1             : // Copyright 2017 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_SNAPSHOT_BUILTIN_SERIALIZER_ALLOCATOR_H_
       6             : #define V8_SNAPSHOT_BUILTIN_SERIALIZER_ALLOCATOR_H_
       7             : 
       8             : #include "src/snapshot/serializer-common.h"
       9             : 
      10             : namespace v8 {
      11             : namespace internal {
      12             : 
      13             : template <class AllocatorT>
      14             : class Serializer;
      15             : 
      16             : class BuiltinSerializerAllocator final {
      17             :  public:
      18             :   BuiltinSerializerAllocator(
      19         161 :       Serializer<BuiltinSerializerAllocator>* serializer) {}
      20             : 
      21             :   SerializerReference Allocate(AllocationSpace space, uint32_t size);
      22           0 :   SerializerReference AllocateMap() { UNREACHABLE(); }
      23           0 :   SerializerReference AllocateLargeObject(uint32_t size) { UNREACHABLE(); }
      24           0 :   SerializerReference AllocateOffHeapBackingStore() { UNREACHABLE(); }
      25             : 
      26             : #ifdef DEBUG
      27             :   bool BackReferenceIsAlreadyAllocated(
      28             :       SerializerReference back_reference) const;
      29             : #endif
      30             : 
      31             :   std::vector<SerializedData::Reservation> EncodeReservations() const;
      32             : 
      33             :   void OutputStatistics();
      34             : 
      35             :  private:
      36             :   static constexpr int kNumberOfPreallocatedSpaces =
      37             :       SerializerDeserializer::kNumberOfPreallocatedSpaces;
      38             :   static constexpr int kNumberOfSpaces =
      39             :       SerializerDeserializer::kNumberOfSpaces;
      40             : 
      41             :   // We need to track a faked offset to create back-references. The size is
      42             :   // kept simply to display statistics.
      43             :   uint32_t virtual_chunk_size_ = 0;
      44             :   uint32_t virtual_chunk_offset_ = 0;
      45             : 
      46             :   DISALLOW_COPY_AND_ASSIGN(BuiltinSerializerAllocator)
      47             : };
      48             : 
      49             : }  // namespace internal
      50             : }  // namespace v8
      51             : 
      52             : #endif  // V8_SNAPSHOT_BUILTIN_SERIALIZER_ALLOCATOR_H_