[WIP]Create a V8 sampler library and tracing controller.

src/profiler/cpu-profiler.cc

 // Copyright 2012 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/cpu-profiler.h"
 
+#include "include/v8-sampler.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/frames-inl.h"
 #include "src/locked-queue-inl.h"
 #include "src/log-inl.h"
 #include "src/profiler/cpu-profiler-inl.h"
 #include "src/vm-state-inl.h"
 
 #include "include/v8-profiler.h"
 
 namespace v8 {
 namespace internal {
 
 static const int kProfilerStackSize = 64 * KB;
 
 
 ProfilerEventsProcessor::ProfilerEventsProcessor(ProfileGenerator* generator,
-                                                 Sampler* sampler,
+                                                 V8Sampler* sampler,
                                                  base::TimeDelta period)
     : Thread(Thread::Options("v8:ProfEvntProc", kProfilerStackSize)),
       generator_(generator),
       sampler_(sampler),
       running_(1),
       period_(period),
       last_code_event_id_(0),
       last_processed_code_event_id_(0) {}
 
 
@@ skipping 416 matching lines @@
 void CpuProfiler::StartProcessorIfNotStarted() {
   if (processor_ != NULL) {
     processor_->AddCurrentStack(isolate_);
     return;
   }
   Logger* logger = isolate_->logger();
   // Disable logging when using the new implementation.
   saved_is_logging_ = logger->is_logging_;
   logger->is_logging_ = false;
   generator_ = new ProfileGenerator(profiles_);
-  Sampler* sampler = logger->sampler();
+  // Sampler* sampler = logger->sampler();
+  V8Sampler* sampler = logger->sampler();
   processor_ = new ProfilerEventsProcessor(
       generator_, sampler, sampling_interval_);
   is_profiling_ = true;
   // Enumerate stuff we already have in the heap.
   DCHECK(isolate_->heap()->HasBeenSetUp());
   if (!FLAG_prof_browser_mode) {
     logger->LogCodeObjects();
   }
   logger->LogCompiledFunctions();
   logger->LogAccessorCallbacks();
@@ skipping 25 matching lines @@
 }
 
 
 void CpuProfiler::StopProcessorIfLastProfile(const char* title) {
   if (profiles_->IsLastProfile(title)) StopProcessor();
 }
 
 
 void CpuProfiler::StopProcessor() {
   Logger* logger = isolate_->logger();
-  Sampler* sampler = reinterpret_cast<Sampler*>(logger->ticker_);
+  // Sampler* sampler = reinterpret_cast<Sampler*>(logger->ticker_);
+  V8Sampler* sampler = reinterpret_cast<V8Sampler*>(logger->ticker_);
   is_profiling_ = false;
   processor_->StopSynchronously();
   delete processor_;
   delete generator_;
   processor_ = NULL;
   generator_ = NULL;
   sampler->SetHasProcessingThread(false);
   sampler->DecreaseProfilingDepth();
   logger->is_logging_ = saved_is_logging_;
 }
 
 
 void CpuProfiler::LogBuiltins() {
   Builtins* builtins = isolate_->builtins();
   DCHECK(builtins->is_initialized());
   for (int i = 0; i < Builtins::builtin_count; i++) {
     CodeEventsContainer evt_rec(CodeEventRecord::REPORT_BUILTIN);
     ReportBuiltinEventRecord* rec = &evt_rec.ReportBuiltinEventRecord_;
     Builtins::Name id = static_cast<Builtins::Name>(i);
     rec->start = builtins->builtin(id)->address();
     rec->builtin_id = id;
     processor_->Enqueue(evt_rec);
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8