// Copyright 2013 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_ARM64_INSTRUMENT_ARM64_H_
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#define V8_ARM64_INSTRUMENT_ARM64_H_
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#include "src/globals.h"
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#include "src/utils.h"
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#include "src/arm64/constants-arm64.h"
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#include "src/arm64/decoder-arm64.h"
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namespace v8 {
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namespace internal {
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const int kCounterNameMaxLength = 256;
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const uint64_t kDefaultInstrumentationSamplingPeriod = 1 << 22;
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enum InstrumentState {
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InstrumentStateDisable = 0,
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InstrumentStateEnable = 1
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};
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enum CounterType {
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Gauge = 0, // Gauge counters reset themselves after reading.
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Cumulative = 1 // Cumulative counters keep their value after reading.
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};
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class Counter {
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public:
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explicit Counter(const char* name, CounterType type = Gauge);
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void Increment();
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void Enable();
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void Disable();
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bool IsEnabled();
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uint64_t count();
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const char* name();
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CounterType type();
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private:
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char name_[kCounterNameMaxLength];
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uint64_t count_;
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bool enabled_;
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CounterType type_;
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};
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class Instrument: public DecoderVisitor {
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public:
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explicit Instrument(
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const char* datafile = nullptr,
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uint64_t sample_period = kDefaultInstrumentationSamplingPeriod);
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~Instrument();
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// Declare all Visitor functions.
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#define DECLARE(A) void Visit##A(Instruction* instr);
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VISITOR_LIST(DECLARE)
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#undef DECLARE
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private:
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void Update();
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void Enable();
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void Disable();
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void DumpCounters();
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void DumpCounterNames();
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void DumpEventMarker(unsigned marker);
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void HandleInstrumentationEvent(unsigned event);
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Counter* GetCounter(const char* name);
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void InstrumentLoadStore(Instruction* instr);
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void InstrumentLoadStorePair(Instruction* instr);
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std::list<Counter*> counters_;
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FILE *output_stream_;
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uint64_t sample_period_;
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};
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} // namespace internal
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} // namespace v8
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#endif // V8_ARM64_INSTRUMENT_ARM64_H_
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