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// Copyright 2014 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_COMPILER_ZONE_STATS_H_ #define V8_COMPILER_ZONE_STATS_H_ #include <map> #include <set> #include <vector> #include "src/common/globals.h" #include "src/zone/zone.h" namespace v8 { namespace internal { namespace compiler { class V8_EXPORT_PRIVATE ZoneStats final { public: class Scope final { public: explicit Scope(ZoneStats* zone_stats, const char* zone_name) : zone_name_(zone_name), zone_stats_(zone_stats), zone_(nullptr) {} ~Scope() { Destroy(); } Zone* zone() { if (zone_ == nullptr) zone_ = zone_stats_->NewEmptyZone(zone_name_); return zone_; } void Destroy() { if (zone_ != nullptr) zone_stats_->ReturnZone(zone_); zone_ = nullptr; } private: const char* zone_name_; ZoneStats* const zone_stats_; Zone* zone_; DISALLOW_COPY_AND_ASSIGN(Scope); }; class V8_EXPORT_PRIVATE StatsScope final { public: explicit StatsScope(ZoneStats* zone_stats); ~StatsScope(); size_t GetMaxAllocatedBytes(); size_t GetCurrentAllocatedBytes(); size_t GetTotalAllocatedBytes(); private: friend class ZoneStats; void ZoneReturned(Zone* zone); using InitialValues = std::map<Zone*, size_t>; ZoneStats* const zone_stats_; InitialValues initial_values_; size_t total_allocated_bytes_at_start_; size_t max_allocated_bytes_; DISALLOW_COPY_AND_ASSIGN(StatsScope); }; explicit ZoneStats(AccountingAllocator* allocator); ~ZoneStats(); size_t GetMaxAllocatedBytes() const; size_t GetTotalAllocatedBytes() const; size_t GetCurrentAllocatedBytes() const; private: Zone* NewEmptyZone(const char* zone_name); void ReturnZone(Zone* zone); static const size_t kMaxUnusedSize = 3; using Zones = std::vector<Zone*>; using Stats = std::vector<StatsScope*>; Zones zones_; Stats stats_; size_t max_allocated_bytes_; size_t total_deleted_bytes_; AccountingAllocator* allocator_; DISALLOW_COPY_AND_ASSIGN(ZoneStats); }; } // namespace compiler } // namespace internal } // namespace v8 #endif // V8_COMPILER_ZONE_STATS_H_