| // Copyright 2010 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 "v8.h" |
| #include "allocation.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class RuntimeProfiler : public AllStatic { |
| public: |
| static bool IsEnabled() { return V8::UseCrankshaft() && FLAG_opt; } |
| |
| static void OptimizeNow(); |
| static void OptimizeSoon(JSFunction* function); |
| |
| static void NotifyTick(); |
| |
| static void Setup(); |
| static void Reset(); |
| static void TearDown(); |
| |
| static int SamplerWindowSize(); |
| static void UpdateSamplesAfterScavenge(); |
| static void RemoveDeadSamples(); |
| static void UpdateSamplesAfterCompact(ObjectVisitor* visitor); |
| }; |
| |
| |
| // Rate limiter intended to be used in the profiler thread. |
| class RuntimeProfilerRateLimiter BASE_EMBEDDED { |
| public: |
| RuntimeProfilerRateLimiter() : non_js_ticks_(0) { } |
| |
| // Suspends the current thread when not executing JavaScript to |
| // minimize CPU usage. Returns whether this thread was suspended |
| // (and so might have to check whether profiling is still active.) |
| // |
| // Does nothing when runtime profiling is not enabled. |
| bool SuspendIfNecessary(); |
| |
| private: |
| int non_js_ticks_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RuntimeProfilerRateLimiter); |
| }; |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_RUNTIME_PROFILER_H_ |