| // Copyright 2012 the V8 project authors. 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 Google Inc. 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 AND 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 V8_RUNTIME_PROFILER_H_ |
| #define V8_RUNTIME_PROFILER_H_ |
| |
| #include "allocation.h" |
| #include "atomicops.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class Isolate; |
| class JSFunction; |
| class Object; |
| class Semaphore; |
| |
| class RuntimeProfiler { |
| public: |
| explicit RuntimeProfiler(Isolate* isolate); |
| |
| void OptimizeNow(); |
| |
| void SetUp(); |
| void Reset(); |
| void TearDown(); |
| |
| void NotifyICChanged() { any_ic_changed_ = true; } |
| |
| // Rate limiting support. |
| |
| void UpdateSamplesAfterScavenge(); |
| void RemoveDeadSamples(); |
| void UpdateSamplesAfterCompact(ObjectVisitor* visitor); |
| |
| void AttemptOnStackReplacement(JSFunction* function); |
| |
| private: |
| static const int kSamplerWindowSize = 16; |
| |
| void Optimize(JSFunction* function, const char* reason); |
| |
| void ClearSampleBuffer(); |
| |
| void ClearSampleBufferNewSpaceEntries(); |
| |
| int LookupSample(JSFunction* function); |
| |
| void AddSample(JSFunction* function, int weight); |
| |
| bool CodeSizeOKForOSR(Code* shared_code); |
| |
| Isolate* isolate_; |
| |
| int sampler_threshold_; |
| int sampler_threshold_size_factor_; |
| int sampler_ticks_until_threshold_adjustment_; |
| |
| Object* sampler_window_[kSamplerWindowSize]; |
| int sampler_window_position_; |
| int sampler_window_weight_[kSamplerWindowSize]; |
| |
| bool any_ic_changed_; |
| bool code_generated_; |
| }; |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_RUNTIME_PROFILER_H_ |