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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 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 char*` 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 char*, size_t> type_name_to_index_map_;
};
} // namespace internal
} // namespace cppgc
#endif // V8_HEAP_CPPGC_HEAP_STATISTICS_COLLECTOR_H_
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