Rename "NoBarrier" memory operations to "Relaxed".

src/log.cc

 // Copyright 2011 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/log.h"
 
 #include <cstdarg>
 #include <memory>
 #include <sstream>
 
@@ skipping 541 matching lines @@
  public:
   explicit Profiler(Isolate* isolate);
   void Engage();
   void Disengage();
 
   // Inserts collected profiling data into buffer.
   void Insert(v8::TickSample* sample) {
     if (paused_)
       return;
 
-    if (Succ(head_) == static_cast<int>(base::NoBarrier_Load(&tail_))) {
+    if (Succ(head_) == static_cast<int>(base::Relaxed_Load(&tail_))) {
       overflow_ = true;
     } else {
       buffer_[head_] = *sample;
       head_ = Succ(head_);
       buffer_semaphore_.Signal();  // Tell we have an element.
     }
   }
 
   virtual void Run();
 
   // Pause and Resume TickSample data collection.
   void pause() { paused_ = true; }
   void resume() { paused_ = false; }
 
  private:
   // Waits for a signal and removes profiling data.
   bool Remove(v8::TickSample* sample) {
     buffer_semaphore_.Wait();  // Wait for an element.
-    *sample = buffer_[base::NoBarrier_Load(&tail_)];
+    *sample = buffer_[base::Relaxed_Load(&tail_)];
     bool result = overflow_;
-    base::NoBarrier_Store(&tail_, static_cast<base::Atomic32>(
-                                      Succ(base::NoBarrier_Load(&tail_))));
+    base::Relaxed_Store(
+        &tail_, static_cast<base::Atomic32>(Succ(base::Relaxed_Load(&tail_))));
     overflow_ = false;
     return result;
   }
 
   // Returns the next index in the cyclic buffer.
   int Succ(int index) { return (index + 1) % kBufferSize; }
 
   Isolate* isolate_;
   // Cyclic buffer for communicating profiling samples
   // between the signal handler and the worker thread.
@@ skipping 65 matching lines @@
 // Profiler implementation.
 //
 Profiler::Profiler(Isolate* isolate)
     : base::Thread(Options("v8:Profiler")),
       isolate_(isolate),
       head_(0),
       overflow_(false),
       buffer_semaphore_(0),
       engaged_(false),
       paused_(false) {
-  base::NoBarrier_Store(&tail_, 0);
-  base::NoBarrier_Store(&running_, 0);
+  base::Relaxed_Store(&tail_, 0);
+  base::Relaxed_Store(&running_, 0);
 }
 
 
 void Profiler::Engage() {
   if (engaged_) return;
   engaged_ = true;
 
   std::vector<base::OS::SharedLibraryAddress> addresses =
       base::OS::GetSharedLibraryAddresses();
   for (size_t i = 0; i < addresses.size(); ++i) {
     LOG(isolate_,
         SharedLibraryEvent(addresses[i].library_path, addresses[i].start,
                            addresses[i].end, addresses[i].aslr_slide));
   }
 
   // Start thread processing the profiler buffer.
-  base::NoBarrier_Store(&running_, 1);
+  base::Relaxed_Store(&running_, 1);
   Start();
 
   // Register to get ticks.
   Logger* logger = isolate_->logger();
   logger->ticker_->SetProfiler(this);
 
   logger->ProfilerBeginEvent();
 }
 
 
 void Profiler::Disengage() {
   if (!engaged_) return;
 
   // Stop receiving ticks.
   isolate_->logger()->ticker_->ClearProfiler();
 
   // Terminate the worker thread by setting running_ to false,
   // inserting a fake element in the queue and then wait for
   // the thread to terminate.
-  base::NoBarrier_Store(&running_, 0);
+  base::Relaxed_Store(&running_, 0);
   v8::TickSample sample;
   // Reset 'paused_' flag, otherwise semaphore may not be signalled.
   resume();
   Insert(&sample);
   Join();
 
   LOG(isolate_, UncheckedStringEvent("profiler", "end"));
 }
 
 
 void Profiler::Run() {
   v8::TickSample sample;
   bool overflow = Remove(&sample);
-  while (base::NoBarrier_Load(&running_)) {
+  while (base::Relaxed_Load(&running_)) {
     LOG(isolate_, TickEvent(&sample, overflow));
     overflow = Remove(&sample);
   }
 }
 
 
 //
 // Logger class implementation.
 //
 
@@ skipping 1168 matching lines @@
 
   if (profiler_listener_.get() != nullptr) {
     removeCodeEventListener(profiler_listener_.get());
   }
 
   return log_->Close();
 }
 
 }  // namespace internal
 }  // namespace v8