Adding 'isolates' argument to LOG to get rid of multiple TLS fetches in profiling.

src/log.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 297 matching lines @@
   // Terminate the worker thread by setting running_ to false,
   // inserting a fake element in the queue and then wait for
   // the thread to terminate.
   running_ = false;
   TickSample sample;
   // Reset 'paused_' flag, otherwise semaphore may not be signalled.
   resume();
   Insert(&sample);
   Join();
 
-  LOG(UncheckedStringEvent("profiler", "end"));
+  LOG(ISOLATE,UncheckedStringEvent("profiler", "end"));
 }
 
 
 void Profiler::Run() {
   TickSample sample;
   bool overflow = Remove(&sample);
+  i::Isolate* isolate = ISOLATE;
   while (running_) {
-    LOG(TickEvent(&sample, overflow));
+    LOG(isolate, TickEvent(&sample, overflow));
     overflow = Remove(&sample);
   }
 }
 
 
 //
 // Logger class implementation.
 //
 
 Logger::Logger()
@@ skipping 825 matching lines @@
   if (profiler_ != NULL && (flags & PROFILER_MODULE_CPU)) {
     // It is OK to have negative nesting.
     if (--cpu_profiler_nesting_ == 0) {
       profiler_->pause();
       if (FLAG_prof_lazy) {
         if (!FLAG_sliding_state_window && !RuntimeProfiler::IsEnabled()) {
           ticker_->Stop();
         }
         FLAG_log_code = false;
         // Must be the same message as Log::kDynamicBufferSeal.
-        LOG(UncheckedStringEvent("profiler", "pause"));
+        LOG(ISOLATE, UncheckedStringEvent("profiler", "pause"));
       }
       --logging_nesting_;
     }
   }
   if (flags &
       (PROFILER_MODULE_HEAP_STATS | PROFILER_MODULE_JS_CONSTRUCTORS)) {
     if (--heap_profiler_nesting_ == 0) {
       FLAG_log_gc = false;
       --logging_nesting_;
     }
   }
   if (tag != 0) {
     UncheckedIntEvent("close-tag", tag);
   }
 }
 
 
 void Logger::ResumeProfiler(int flags, int tag) {
   if (!log_->IsEnabled()) return;
   if (tag != 0) {
     UncheckedIntEvent("open-tag", tag);
   }
   if (profiler_ != NULL && (flags & PROFILER_MODULE_CPU)) {
     if (cpu_profiler_nesting_++ == 0) {
       ++logging_nesting_;
       if (FLAG_prof_lazy) {
         profiler_->Engage();
-        LOG(UncheckedStringEvent("profiler", "resume"));
+        LOG(ISOLATE, UncheckedStringEvent("profiler", "resume"));
         FLAG_log_code = true;
         LogCompiledFunctions();
         LogAccessorCallbacks();
         if (!FLAG_sliding_state_window && !ticker_->IsActive()) {
           ticker_->Start();
         }
       }
       profiler_->resume();
     }
   }
@@ skipping 135 matching lines @@
         break;
       case Code::CALL_IC:
         description = "A call IC from the snapshot";
         tag = Logger::CALL_IC_TAG;
         break;
       case Code::KEYED_CALL_IC:
         description = "A keyed call IC from the snapshot";
         tag = Logger::KEYED_CALL_IC_TAG;
         break;
     }
-    PROFILE(CodeCreateEvent(tag, code_object, description));
+    PROFILE(ISOLATE, CodeCreateEvent(tag, code_object, description));
   }
 }
 
 
 void Logger::LogCodeInfo() {
 #ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_code || !FLAG_ll_prof) return;
 #if V8_TARGET_ARCH_IA32
   const char arch[] = "ia32";
 #elif V8_TARGET_ARCH_X64
@@ skipping 44 matching lines @@
         Builtins::LazyCompile))
       continue;
     Handle<SharedFunctionInfo> shared = sfis[i];
     Handle<String> func_name(shared->DebugName());
     if (shared->script()->IsScript()) {
       Handle<Script> script(Script::cast(shared->script()));
       if (script->name()->IsString()) {
         Handle<String> script_name(String::cast(script->name()));
         int line_num = GetScriptLineNumber(script, shared->start_position());
         if (line_num > 0) {
-          PROFILE(CodeCreateEvent(
-              Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
-              *code_objects[i], *shared,
-              *script_name, line_num + 1));
+          PROFILE(ISOLATE,
+                  CodeCreateEvent(
+                    Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
+                    *code_objects[i], *shared,
+                    *script_name, line_num + 1));
         } else {
           // Can't distinguish eval and script here, so always use Script.
-          PROFILE(CodeCreateEvent(
-              Logger::ToNativeByScript(Logger::SCRIPT_TAG, *script),
-              *code_objects[i], *shared, *script_name));
+          PROFILE(ISOLATE,
+                  CodeCreateEvent(
+                      Logger::ToNativeByScript(Logger::SCRIPT_TAG, *script),
+                      *code_objects[i], *shared, *script_name));
         }
       } else {
-        PROFILE(CodeCreateEvent(
-            Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
-            *code_objects[i], *shared, *func_name));
+        PROFILE(ISOLATE,
+                CodeCreateEvent(
+                    Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
+                    *code_objects[i], *shared, *func_name));
       }
     } else if (shared->IsApiFunction()) {
       // API function.
       FunctionTemplateInfo* fun_data = shared->get_api_func_data();
       Object* raw_call_data = fun_data->call_code();
       if (!raw_call_data->IsUndefined()) {
         CallHandlerInfo* call_data = CallHandlerInfo::cast(raw_call_data);
         Object* callback_obj = call_data->callback();
         Address entry_point = v8::ToCData<Address>(callback_obj);
-        PROFILE(CallbackEvent(*func_name, entry_point));
+        PROFILE(ISOLATE, CallbackEvent(*func_name, entry_point));
       }
     } else {
-      PROFILE(CodeCreateEvent(
-          Logger::LAZY_COMPILE_TAG, *code_objects[i], *shared, *func_name));
+      PROFILE(ISOLATE,
+              CodeCreateEvent(
+                  Logger::LAZY_COMPILE_TAG, *code_objects[i],
+                  *shared, *func_name));
     }
   }
 }
 
 
 void Logger::LogAccessorCallbacks() {
   AssertNoAllocation no_alloc;
   HeapIterator iterator;
+  i::Isolate* isolate = ISOLATE;
   for (HeapObject* obj = iterator.next(); obj != NULL; obj = iterator.next()) {
     if (!obj->IsAccessorInfo()) continue;
     AccessorInfo* ai = AccessorInfo::cast(obj);
     if (!ai->name()->IsString()) continue;
     String* name = String::cast(ai->name());
     Address getter_entry = v8::ToCData<Address>(ai->getter());
     if (getter_entry != 0) {
-      PROFILE(GetterCallbackEvent(name, getter_entry));
+      PROFILE(isolate, GetterCallbackEvent(name, getter_entry));
     }
     Address setter_entry = v8::ToCData<Address>(ai->setter());
     if (setter_entry != 0) {
-      PROFILE(SetterCallbackEvent(name, setter_entry));
+      PROFILE(isolate, SetterCallbackEvent(name, setter_entry));
     }
   }
 }
 
 #endif
 
 
 bool Logger::Setup() {
 #ifdef ENABLE_LOGGING_AND_PROFILING
   // Tests and EnsureInitialize() can call this twice in a row. It's harmless.
@@ skipping 161 matching lines @@
 void SamplerRegistry::RemoveActiveSampler(Sampler* sampler) {
   ASSERT(sampler->IsActive());
   ScopedLock lock(mutex_);
   ASSERT(active_samplers_ != NULL);
   bool removed = active_samplers_->RemoveElement(sampler);
   ASSERT(removed);
   USE(removed);
 }
 
 } }  // namespace v8::internal