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// Copyright 2014, ARM Limited
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of ARM Limited nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef VIXL_A64_INSTRUMENT_A64_H_
#define VIXL_A64_INSTRUMENT_A64_H_
#include "mozilla/Vector.h"
#include "jit/arm64/vixl/Constants-vixl.h"
#include "jit/arm64/vixl/Decoder-vixl.h"
#include "jit/arm64/vixl/Globals-vixl.h"
#include "jit/arm64/vixl/Utils-vixl.h"
#include "js/AllocPolicy.h"
namespace vixl {
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 = NULL,
uint64_t sample_period = kDefaultInstrumentationSamplingPeriod);
~Instrument();
void Enable();
void Disable();
// Declare all Visitor functions.
#define DECLARE(A) void Visit##A(const Instruction* instr) override;
VISITOR_LIST(DECLARE)
#undef DECLARE
private:
void Update();
void DumpCounters();
void DumpCounterNames();
void DumpEventMarker(unsigned marker);
void HandleInstrumentationEvent(unsigned event);
Counter* GetCounter(const char* name);
void InstrumentLoadStore(const Instruction* instr);
void InstrumentLoadStorePair(const Instruction* instr);
mozilla::Vector<Counter*, 8, js::SystemAllocPolicy> counters_;
FILE *output_stream_;
uint64_t sample_period_;
};
} // namespace vixl
#endif // VIXL_A64_INSTRUMENT_A64_H_
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