Replacing circular queue by single buffer in CPU Profiler.

test/cctest/test-cpu-profiler.cc

Index: test/cctest/test-cpu-profiler.cc
diff --git a/test/cctest/test-cpu-profiler.cc b/test/cctest/test-cpu-profiler.cc
index 20af07054a6c2f4359533d2d4603c3764115ef4f..589e6d8c592476421e6897a382355d459653a3ff 100644
--- a/test/cctest/test-cpu-profiler.cc
+++ b/test/cctest/test-cpu-profiler.cc
@@ -5,6 +5,7 @@
 #include "v8.h"
 #include "cpu-profiler-inl.h"
 #include "cctest.h"
+#include "platform.h"
 #include "../include/v8-profiler.h"
 
 using i::CodeEntry;
@@ -38,11 +39,13 @@ static inline i::Address ToAddress(int n) {
   return reinterpret_cast<i::Address>(n);
 }
 
-static void EnqueueTickSampleEvent(ProfilerEventsProcessor* proc,
-                                   i::Address frame1,
-                                   i::Address frame2 = NULL,
-                                   i::Address frame3 = NULL) {
-  i::TickSample* sample = proc->TickSampleEvent();
+static void AddTickSampleEvent(ProfilerEventsProcessor* processor,
+                               i::Address frame1,
+                               i::Address frame2 = NULL,
+                               i::Address frame3 = NULL) {
+  i::TickSample* sample;
+  i::OS::Sleep(20);
+  while ((sample = processor->StartTickSampleEvent()) == NULL) i::OS::Sleep(20);
   sample->pc = frame1;
   sample->tos = frame1;
   sample->frames_count = 0;
@@ -54,6 +57,7 @@ static void EnqueueTickSampleEvent(ProfilerEventsProcessor* proc,
     sample->stack[1] = frame3;
     sample->frames_count = 2;
   }
+  processor->FinishTickSampleEvent();
 }
 
 namespace {
@@ -108,8 +112,8 @@ TEST(CodeEvents) {
   processor.CodeMoveEvent(ToAddress(0x1400), ToAddress(0x1500));
   processor.CodeCreateEvent(i::Logger::STUB_TAG, 3, ToAddress(0x1600), 0x10);
   processor.CodeCreateEvent(i::Logger::STUB_TAG, 4, ToAddress(0x1605), 0x10);
-  // Enqueue a tick event to enable code events processing.
-  EnqueueTickSampleEvent(&processor, ToAddress(0x1000));
+  // Add a tick event to enable code events processing.
+  AddTickSampleEvent(&processor, ToAddress(0x1000));
 
   processor.Stop();
   processor.Join();
@@ -154,12 +158,12 @@ TEST(TickEvents) {
                             "ddd",
                             ToAddress(0x1400),
                             0x80);
-  EnqueueTickSampleEvent(&processor, ToAddress(0x1210));
-  EnqueueTickSampleEvent(&processor, ToAddress(0x1305), ToAddress(0x1220));
-  EnqueueTickSampleEvent(&processor,
-                         ToAddress(0x1404),
-                         ToAddress(0x1305),
-                         ToAddress(0x1230));
+  AddTickSampleEvent(&processor, ToAddress(0x1210));
+  AddTickSampleEvent(&processor, ToAddress(0x1305), ToAddress(0x1220));
+  AddTickSampleEvent(&processor,
+                     ToAddress(0x1404),
+                     ToAddress(0x1305),
+                     ToAddress(0x1230));
 
   processor.Stop();
   processor.Join();
@@ -240,13 +244,14 @@ TEST(Issue1398) {
                             ToAddress(0x1200),
                             0x80);
 
-  i::TickSample* sample = processor.TickSampleEvent();
+  i::TickSample* sample = processor.StartTickSampleEvent();
   sample->pc = ToAddress(0x1200);
   sample->tos = 0;
   sample->frames_count = i::TickSample::kMaxFramesCount;
   for (int i = 0; i < sample->frames_count; ++i) {
     sample->stack[i] = ToAddress(0x1200);
   }
+  processor.FinishTickSampleEvent();
 
   processor.Stop();
   processor.Join();