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// Copyright 2013 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_CODEGEN_ARM64_INSTRUMENT_ARM64_H_
#define V8_CODEGEN_ARM64_INSTRUMENT_ARM64_H_
#include "src/common/globals.h"
#include "src/utils/utils.h"
#include "src/codegen/arm64/constants-arm64.h"
#include "src/codegen/arm64/decoder-arm64.h"
namespace v8 {
namespace internal {
const int kCounterNameMaxLength = 256;
const uint64_t kDefaultInstrumentationSamplingPeriod = 1 << 22;
enum InstrumentState { InstrumentStateDisable = 0, InstrumentStateEnable = 1 };
enum CounterType {
Gauge = 0, // Gauge counters reset themselves after reading.
Cumulative = 1 // Cumulative counters keep their value after reading.
};
class Counter {
public:
explicit Counter(const char* name, CounterType type = Gauge);
void Increment();
void Enable();
void Disable();
bool IsEnabled();
uint64_t count();
const char* name();
CounterType type();
private:
char name_[kCounterNameMaxLength];
uint64_t count_;
bool enabled_;
CounterType type_;
};
class Instrument : public DecoderVisitor {
public:
explicit Instrument(
const char* datafile = nullptr,
uint64_t sample_period = kDefaultInstrumentationSamplingPeriod);
~Instrument();
// Declare all Visitor functions.
#define DECLARE(A) void Visit##A(Instruction* instr);
VISITOR_LIST(DECLARE)
#undef DECLARE
private:
void Update();
void Enable();
void Disable();
void DumpCounters();
void DumpCounterNames();
void DumpEventMarker(unsigned marker);
void HandleInstrumentationEvent(unsigned event);
Counter* GetCounter(const char* name);
void InstrumentLoadStore(Instruction* instr);
void InstrumentLoadStorePair(Instruction* instr);
std::list<Counter*> counters_;
FILE* output_stream_;
uint64_t sample_period_;
};
} // namespace internal
} // namespace v8
#endif // V8_CODEGEN_ARM64_INSTRUMENT_ARM64_H_