Add CollectSample API function to CpuProfiler

src/profiler/sampler.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/profiler/sampler.h"
 
 #if V8_OS_POSIX && !V8_OS_CYGWIN
 
 #define USE_SIGNALS
 
@@ skipping 639 matching lines @@
 
 base::Mutex* SamplerThread::mutex_ = NULL;
 SamplerThread* SamplerThread::instance_ = NULL;
 
 
 //
 // StackTracer implementation
 //
 DISABLE_ASAN void TickSample::Init(Isolate* isolate,
                                    const v8::RegisterState& regs,
-                                   RecordCEntryFrame record_c_entry_frame) {
+                                   RecordCEntryFrame record_c_entry_frame,
+                                   bool update_stats) {
   timestamp = base::TimeTicks::HighResolutionNow();
   pc = reinterpret_cast<Address>(regs.pc);
   state = isolate->current_vm_state();
+  this->update_stats = update_stats;
 
   // Avoid collecting traces while doing GC.
   if (state == GC) return;
 
   Address js_entry_sp = isolate->js_entry_sp();
   if (js_entry_sp == 0) return;  // Not executing JS now.
 
   if (pc && IsNoFrameRegion(pc)) {
     pc = 0;
     return;
@@ skipping 115 matching lines @@
   SignalHandler::DecreaseSamplerCount();
 #endif
   base::NoBarrier_AtomicIncrement(&profiling_, -1);
 }
 
 
 void Sampler::SampleStack(const v8::RegisterState& state) {
   TickSample* sample = isolate_->cpu_profiler()->StartTickSample();
   TickSample sample_obj;
   if (sample == NULL) sample = &sample_obj;
-  sample->Init(isolate_, state, TickSample::kIncludeCEntryFrame);
+  sample->Init(isolate_, state, TickSample::kIncludeCEntryFrame, true);
   if (is_counting_samples_) {
     if (sample->state == JS || sample->state == EXTERNAL) {
       ++js_and_external_sample_count_;
     }
   }
   Tick(sample);
   if (sample != &sample_obj) {
     isolate_->cpu_profiler()->FinishTickSample();
   }
 }
@@ skipping 42 matching lines @@
     SampleStack(state);
   }
   ResumeThread(profiled_thread);
 }
 
 #endif  // USE_SIGNALS
 
 
 }  // namespace internal
 }  // namespace v8