Replacing circular queue by single buffer in CPU Profiler.

src/platform-solaris.cc

Index: src/platform-solaris.cc
diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
index d6fa4159d14511fae4f3f782ab918af1a629e1e5..36d89e6d12a8c750c9cda23f5d7426adc1ef95da 100644
--- a/src/platform-solaris.cc
+++ b/src/platform-solaris.cc
@@ -669,9 +669,8 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
   Sampler* sampler = isolate->logger()->sampler();
   if (sampler == NULL || !sampler->IsActive()) return;
 
-  TickSample sample_obj;
-  TickSample* sample = CpuProfiler::TickSampleEvent(isolate);
-  if (sample == NULL) sample = &sample_obj;
+  TickSample* sample = CpuProfiler::StartTickSampleEvent(isolate);
+  if (sample == NULL) return;
 
   // Extracting the sample from the context is extremely machine dependent.
   ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
@@ -684,6 +683,7 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
 
   sampler->SampleStack(sample);
   sampler->Tick(sample);
+  CpuProfiler::FinishTickSampleEvent(isolate);
 }
 
 class Sampler::PlatformData : public Malloced {