| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #ifndef VM_PROFILER_H_ |
| #define VM_PROFILER_H_ |
| |
| #include "vm/allocation.h" |
| #include "vm/code_observers.h" |
| #include "vm/globals.h" |
| #include "vm/thread.h" |
| #include "vm/thread_interrupter.h" |
| |
| namespace dart { |
| |
| // Forward declarations. |
| class JSONArray; |
| class JSONStream; |
| class ProfilerCodeRegionTable; |
| class Sample; |
| class SampleBuffer; |
| |
| // Profiler |
| class Profiler : public AllStatic { |
| public: |
| static void InitOnce(); |
| static void Shutdown(); |
| |
| static void InitProfilingForIsolate(Isolate* isolate, |
| bool shared_buffer = true); |
| static void ShutdownProfilingForIsolate(Isolate* isolate); |
| |
| static void BeginExecution(Isolate* isolate); |
| static void EndExecution(Isolate* isolate); |
| |
| static void PrintToJSONStream(Isolate* isolate, JSONStream* stream, |
| bool full); |
| static void WriteProfile(Isolate* isolate); |
| |
| static SampleBuffer* sample_buffer() { |
| return sample_buffer_; |
| } |
| |
| private: |
| static bool initialized_; |
| static Monitor* monitor_; |
| |
| static intptr_t ProcessSamples(Isolate* isolate, |
| ProfilerCodeRegionTable* code_region_table, |
| SampleBuffer* sample_buffer); |
| |
| static intptr_t ProcessSample(Isolate* isolate, |
| ProfilerCodeRegionTable* code_region_table, |
| Sample* sample); |
| |
| static void RecordTickInterruptCallback(const InterruptedThreadState& state, |
| void* data); |
| |
| static void RecordSampleInterruptCallback(const InterruptedThreadState& state, |
| void* data); |
| |
| static SampleBuffer* sample_buffer_; |
| }; |
| |
| |
| class IsolateProfilerData { |
| public: |
| IsolateProfilerData(SampleBuffer* sample_buffer, bool own_sample_buffer); |
| ~IsolateProfilerData(); |
| |
| SampleBuffer* sample_buffer() const { return sample_buffer_; } |
| |
| void set_sample_buffer(SampleBuffer* sample_buffer) { |
| sample_buffer_ = sample_buffer; |
| } |
| |
| private: |
| SampleBuffer* sample_buffer_; |
| bool own_sample_buffer_; |
| DISALLOW_COPY_AND_ASSIGN(IsolateProfilerData); |
| }; |
| |
| |
| // Profile sample. |
| class Sample { |
| public: |
| enum SampleType { |
| kIsolateSample, |
| }; |
| |
| static void InitOnce(); |
| |
| uintptr_t At(intptr_t i) const; |
| void SetAt(intptr_t i, uintptr_t pc); |
| void Init(SampleType type, Isolate* isolate, int64_t timestamp, ThreadId tid); |
| void CopyInto(Sample* dst) const; |
| |
| static Sample* Allocate(); |
| static intptr_t instance_size() { |
| return instance_size_; |
| } |
| |
| SampleType type() const { |
| return type_; |
| } |
| |
| Isolate* isolate() const { |
| return isolate_; |
| } |
| |
| int64_t timestamp() const { |
| return timestamp_; |
| } |
| |
| private: |
| static intptr_t instance_size_; |
| int64_t timestamp_; |
| ThreadId tid_; |
| Isolate* isolate_; |
| SampleType type_; |
| // Note: This class has a size determined at run-time. The pcs_ array |
| // must be the final field. |
| uintptr_t pcs_[0]; |
| |
| DISALLOW_COPY_AND_ASSIGN(Sample); |
| }; |
| |
| |
| // Ring buffer of samples. |
| class SampleBuffer { |
| public: |
| static const intptr_t kDefaultBufferCapacity = 120000; // 2 minutes @ 1000hz. |
| |
| explicit SampleBuffer(intptr_t capacity = kDefaultBufferCapacity); |
| ~SampleBuffer(); |
| |
| intptr_t capacity() const { return capacity_; } |
| Sample* ReserveSample(); |
| void CopySample(intptr_t i, Sample* sample) const; |
| Sample* At(intptr_t idx) const; |
| |
| private: |
| Sample* samples_; |
| intptr_t capacity_; |
| uintptr_t cursor_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SampleBuffer); |
| }; |
| |
| |
| class ProfilerSampleStackWalker : public ValueObject { |
| public: |
| ProfilerSampleStackWalker(Sample* sample, |
| uintptr_t stack_lower, |
| uintptr_t stack_upper, |
| uintptr_t pc, |
| uintptr_t fp, |
| uintptr_t sp); |
| |
| int walk(); |
| |
| private: |
| uword* CallerPC(uword* fp); |
| uword* CallerFP(uword* fp); |
| |
| bool ValidInstructionPointer(uword* pc); |
| |
| bool ValidFramePointer(uword* fp); |
| |
| Sample* sample_; |
| const uintptr_t stack_lower_; |
| const uintptr_t stack_upper_; |
| const uintptr_t original_pc_; |
| const uintptr_t original_fp_; |
| const uintptr_t original_sp_; |
| uintptr_t lower_bound_; |
| }; |
| |
| |
| } // namespace dart |
| |
| #endif // VM_PROFILER_H_ |