1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_ARM64_INSTRUMENT_ARM64_H_ 6 #define V8_ARM64_INSTRUMENT_ARM64_H_ 7 8 #include "src/globals.h" 9 #include "src/utils.h" 10 11 #include "src/arm64/constants-arm64.h" 12 #include "src/arm64/decoder-arm64.h" 13 14 namespace v8 { 15 namespace internal { 16 17 const int kCounterNameMaxLength = 256; 18 const uint64_t kDefaultInstrumentationSamplingPeriod = 1 << 22; 19 20 21 enum InstrumentState { 22 InstrumentStateDisable = 0, 23 InstrumentStateEnable = 1 24 }; 25 26 27 enum CounterType { 28 Gauge = 0, // Gauge counters reset themselves after reading. 29 Cumulative = 1 // Cumulative counters keep their value after reading. 30 }; 31 32 33 class Counter { 34 public: 35 explicit Counter(const char* name, CounterType type = Gauge); 36 37 void Increment(); 38 void Enable(); 39 void Disable(); 40 bool IsEnabled(); 41 uint64_t count(); 42 const char* name(); 43 CounterType type(); 44 45 private: 46 char name_[kCounterNameMaxLength]; 47 uint64_t count_; 48 bool enabled_; 49 CounterType type_; 50 }; 51 52 53 class Instrument: public DecoderVisitor { 54 public: 55 explicit Instrument( 56 const char* datafile = nullptr, 57 uint64_t sample_period = kDefaultInstrumentationSamplingPeriod); 58 ~Instrument(); 59 60 // Declare all Visitor functions. 61 #define DECLARE(A) void Visit##A(Instruction* instr); 62 VISITOR_LIST(DECLARE) 63 #undef DECLARE 64 65 private: 66 void Update(); 67 void Enable(); 68 void Disable(); 69 void DumpCounters(); 70 void DumpCounterNames(); 71 void DumpEventMarker(unsigned marker); 72 void HandleInstrumentationEvent(unsigned event); 73 Counter* GetCounter(const char* name); 74 75 void InstrumentLoadStore(Instruction* instr); 76 void InstrumentLoadStorePair(Instruction* instr); 77 78 std::list<Counter*> counters_; 79 80 FILE *output_stream_; 81 uint64_t sample_period_; 82 }; 83 84 } // namespace internal 85 } // namespace v8 86 87 #endif // V8_ARM64_INSTRUMENT_ARM64_H_ 88