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      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(const char* datafile = NULL,
     56     uint64_t sample_period = kDefaultInstrumentationSamplingPeriod);
     57   ~Instrument();
     58 
     59   // Declare all Visitor functions.
     60   #define DECLARE(A) void Visit##A(Instruction* instr);
     61   VISITOR_LIST(DECLARE)
     62   #undef DECLARE
     63 
     64  private:
     65   void Update();
     66   void Enable();
     67   void Disable();
     68   void DumpCounters();
     69   void DumpCounterNames();
     70   void DumpEventMarker(unsigned marker);
     71   void HandleInstrumentationEvent(unsigned event);
     72   Counter* GetCounter(const char* name);
     73 
     74   void InstrumentLoadStore(Instruction* instr);
     75   void InstrumentLoadStorePair(Instruction* instr);
     76 
     77   std::list<Counter*> counters_;
     78 
     79   FILE *output_stream_;
     80   uint64_t sample_period_;
     81 };
     82 
     83 } }  // namespace v8::internal
     84 
     85 #endif  // V8_ARM64_INSTRUMENT_ARM64_H_
     86