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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 V8_NODISCARD Scope final {
public:
explicit Scope(ZoneStats* zone_stats, const char* zone_name,
bool support_zone_compression = false)
: zone_name_(zone_name),
zone_stats_(zone_stats),
zone_(nullptr),
support_zone_compression_(support_zone_compression) {}
~Scope() { Destroy(); }
Scope(const Scope&) = delete;
Scope& operator=(const Scope&) = delete;
Zone* zone() {
if (zone_ == nullptr)
zone_ =
zone_stats_->NewEmptyZone(zone_name_, support_zone_compression_);
return zone_;
}
void Destroy() {
if (zone_ != nullptr) zone_stats_->ReturnZone(zone_);
zone_ = nullptr;
}
ZoneStats* zone_stats() const { return zone_stats_; }
private:
const char* zone_name_;
ZoneStats* const zone_stats_;
Zone* zone_;
const bool support_zone_compression_;
};
class V8_EXPORT_PRIVATE V8_NODISCARD StatsScope final {
public:
explicit StatsScope(ZoneStats* zone_stats);
~StatsScope();
StatsScope(const StatsScope&) = delete;
StatsScope& operator=(const StatsScope&) = delete;
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_;
};
explicit ZoneStats(AccountingAllocator* allocator);
~ZoneStats();
ZoneStats(const ZoneStats&) = delete;
ZoneStats& operator=(const ZoneStats&) = delete;
size_t GetMaxAllocatedBytes() const;
size_t GetTotalAllocatedBytes() const;
size_t GetCurrentAllocatedBytes() const;
private:
Zone* NewEmptyZone(const char* zone_name, bool support_zone_compression);
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_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_ZONE_STATS_H_
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