heap-statistics.h

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// Copyright 2021 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.
 
#ifndef INCLUDE_CPPGC_HEAP_STATISTICS_H_
#define INCLUDE_CPPGC_HEAP_STATISTICS_H_
 
#include <cstddef>
#include <cstdint>
#include <string>
#include <vector>
 
namespace cppgc {
 
struct HeapStatistics final {
  enum DetailLevel : uint8_t {
    kBrief,
    kDetailed,
  };
 
  struct ObjectStatsEntry {
    size_t allocated_bytes;
    size_t object_count;
  };
 
  struct PageStatistics {
    size_t committed_size_bytes = 0;
    size_t resident_size_bytes = 0;
    size_t used_size_bytes = 0;
    std::vector<ObjectStatsEntry> object_statistics;
  };
 
  struct FreeListStatistics {
    std::vector<size_t> bucket_size;
    std::vector<size_t> free_count;
    std::vector<size_t> free_size;
  };
 
  struct SpaceStatistics {
    std::string name;
    size_t committed_size_bytes = 0;
    size_t resident_size_bytes = 0;
    size_t used_size_bytes = 0;
    std::vector<PageStatistics> page_stats;
    FreeListStatistics free_list_stats;
  };
 
  size_t committed_size_bytes = 0;
  size_t resident_size_bytes = 0;
  size_t used_size_bytes = 0;
  DetailLevel detail_level;
 
  std::vector<SpaceStatistics> space_stats;
 
  std::vector<std::string> type_names;
};
 
}  // namespace cppgc
 
#endif  // INCLUDE_CPPGC_HEAP_STATISTICS_H_