// 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 V8_HEAP_CPPGC_HEAP_STATISTICS_COLLECTOR_H_ #define V8_HEAP_CPPGC_HEAP_STATISTICS_COLLECTOR_H_ #include <unordered_map> #include "include/cppgc/heap-statistics.h" #include "src/heap/cppgc/heap-visitor.h" namespace cppgc { namespace internal { class HeapStatisticsCollector : private HeapVisitor<HeapStatisticsCollector> { friend class HeapVisitor<HeapStatisticsCollector>; public: HeapStatistics CollectDetailedStatistics(HeapBase*); private: bool VisitNormalPageSpace(NormalPageSpace&); bool VisitLargePageSpace(LargePageSpace&); bool VisitNormalPage(NormalPage&); bool VisitLargePage(LargePage&); bool VisitHeapObjectHeader(HeapObjectHeader&); HeapStatistics* current_stats_; HeapStatistics::SpaceStatistics* current_space_stats_ = nullptr; HeapStatistics::PageStatistics* current_page_stats_ = nullptr; // Index from type name to final index in `HeapStats::type_names`. // Canonicalizing based on `const void*` assuming stable addresses. If the // implementation of `NameProvider` decides to return different type name // c-strings, the final outcome is less compact. std::unordered_map<const void*, size_t> type_name_to_index_map_; }; } // namespace internal } // namespace cppgc #endif // V8_HEAP_CPPGC_HEAP_STATISTICS_COLLECTOR_H_