[Tracing] Use TracingCategoryObserver in runtime statistics

This patch is a follow-up patch to enable runtime statistics to use
TracingCategoryObserver.

BUG=v8:5590

Review-Url: https://codereview.chromium.org/2460973003
Cr-Commit-Position: refs/heads/master@{#40742}

src/arguments.h

@@ -96,8 +96,7 @@ double ClobberDoubleRegisters(double x1, double x2, double x3, double x4);
   Type Name(int args_length, Object** args_object, Isolate* isolate) {        \
     DCHECK(isolate->context() == nullptr || isolate->context()->IsContext()); \
     CLOBBER_DOUBLE_REGISTERS();                                               \
-    if (V8_UNLIKELY(TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||       \
-                    FLAG_runtime_call_stats)) {                               \
+    if (V8_UNLIKELY(FLAG_runtime_stats)) {                                    \
       return Stats_##Name(args_length, args_object, isolate);                 \
     }                                                                         \
     Arguments args(args_length, args_object);                                 \

src/builtins/builtins-utils.h

@@ -91,8 +91,7 @@ class BuiltinArguments : public Arguments {
   MUST_USE_RESULT Object* Builtin_##name(                                     \
       int args_length, Object** args_object, Isolate* isolate) {              \
     DCHECK(isolate->context() == nullptr || isolate->context()->IsContext()); \
-    if (V8_UNLIKELY(TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||       \
-                    FLAG_runtime_call_stats)) {                               \
+    if (V8_UNLIKELY(FLAG_runtime_stats)) {                                    \
       return Builtin_Impl_Stats_##name(args_length, args_object, isolate);    \
     }                                                                         \
     BuiltinArguments args(args_length, args_object);                          \

src/compiler-dispatcher/compiler-dispatcher-tracer.cc

@@ -23,8 +23,7 @@ CompilerDispatcherTracer::Scope::Scope(CompilerDispatcherTracer* tracer,
     : tracer_(tracer), scope_id_(scope_id), num_(num) {
   start_time_ = MonotonicallyIncreasingTimeInMs();
   // TODO(cbruni): remove once we fully moved to a trace-based system.
-  if (TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-      FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     RuntimeCallStats::Enter(tracer_->runtime_call_stats_, &timer_,
                             &RuntimeCallStats::CompilerDispatcher);
   }
@@ -53,8 +52,7 @@ CompilerDispatcherTracer::Scope::~Scope() {
       break;
   }
   // TODO(cbruni): remove once we fully moved to a trace-based system.
-  if (TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-      FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     RuntimeCallStats::Leave(tracer_->runtime_call_stats_, &timer_);
   }
 }

src/counters-inl.h

@@ -12,16 +12,14 @@ namespace internal {
 
 RuntimeCallTimerScope::RuntimeCallTimerScope(
     Isolate* isolate, RuntimeCallStats::CounterId counter_id) {
-  if (V8_UNLIKELY(TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-                  FLAG_runtime_call_stats)) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     Initialize(isolate, counter_id);
   }
 }
 
 RuntimeCallTimerScope::RuntimeCallTimerScope(
     HeapObject* heap_object, RuntimeCallStats::CounterId counter_id) {
-  if (V8_UNLIKELY(TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-                  FLAG_runtime_call_stats)) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     Initialize(heap_object->GetIsolate(), counter_id);
   }
 }

src/counters.cc

@@ -344,9 +344,8 @@ void RuntimeCallStats::Print(std::ostream& os) {
 }
 
 void RuntimeCallStats::Reset() {
-  if (!FLAG_runtime_call_stats &&
-      !TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED())
-    return;
+  if (V8_LIKELY(FLAG_runtime_stats == 0)) return;
+
 #define RESET_COUNTER(name) this->name.Reset();
   FOR_EACH_MANUAL_COUNTER(RESET_COUNTER)
 #undef RESET_COUNTER

src/counters.h

@@ -853,14 +853,13 @@ class RuntimeCallStats {
   bool in_use_;
 };
 
-#define TRACE_RUNTIME_CALL_STATS(isolate, counter_name)                 \
-  do {                                                                  \
-    if (V8_UNLIKELY(TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() || \
-                    FLAG_runtime_call_stats)) {                         \
-      RuntimeCallStats::CorrectCurrentCounterId(                        \
-          isolate->counters()->runtime_call_stats(),                    \
-          &RuntimeCallStats::counter_name);                             \
-    }                                                                   \
+#define TRACE_RUNTIME_CALL_STATS(isolate, counter_name) \
+  do {                                                  \
+    if (V8_UNLIKELY(FLAG_runtime_stats)) {              \
+      RuntimeCallStats::CorrectCurrentCounterId(        \
+          isolate->counters()->runtime_call_stats(),    \
+          &RuntimeCallStats::counter_name);             \
+    }                                                   \
   } while (false)
 
 #define TRACE_HANDLER_STATS(isolate, counter_name) \

src/crankshaft/hydrogen.cc

@@ -8893,7 +8893,7 @@ bool HOptimizedGraphBuilder::TryInlineBuiltinMethodCall(
 
 bool HOptimizedGraphBuilder::TryInlineApiFunctionCall(Call* expr,
                                                       HValue* receiver) {
-  if (FLAG_runtime_call_stats) return false;
+  if (V8_UNLIKELY(FLAG_runtime_stats)) return false;
   Handle<JSFunction> function = expr->target();
   int argc = expr->arguments()->length();
   SmallMapList receiver_maps;
@@ -8906,7 +8906,7 @@ bool HOptimizedGraphBuilder::TryInlineApiMethodCall(
     Call* expr,
     HValue* receiver,
     SmallMapList* receiver_maps) {
-  if (FLAG_runtime_call_stats) return false;
+  if (V8_UNLIKELY(FLAG_runtime_stats)) return false;
   Handle<JSFunction> function = expr->target();
   int argc = expr->arguments()->length();
   return TryInlineApiCall(function, receiver, receiver_maps, argc, expr->id(),
@@ -8916,7 +8916,7 @@ bool HOptimizedGraphBuilder::TryInlineApiMethodCall(
 bool HOptimizedGraphBuilder::TryInlineApiGetter(Handle<Object> function,
                                                 Handle<Map> receiver_map,
                                                 BailoutId ast_id) {
-  if (FLAG_runtime_call_stats) return false;
+  if (V8_UNLIKELY(FLAG_runtime_stats)) return false;
   SmallMapList receiver_maps(1, zone());
   receiver_maps.Add(receiver_map, zone());
   return TryInlineApiCall(function,
@@ -8940,7 +8940,7 @@ bool HOptimizedGraphBuilder::TryInlineApiCall(
     Handle<Object> function, HValue* receiver, SmallMapList* receiver_maps,
     int argc, BailoutId ast_id, ApiCallType call_type,
     TailCallMode syntactic_tail_call_mode) {
-  if (FLAG_runtime_call_stats) return false;
+  if (V8_UNLIKELY(FLAG_runtime_stats)) return false;
   if (function->IsJSFunction() &&
       Handle<JSFunction>::cast(function)->context()->native_context() !=
           top_info()->closure()->context()->native_context()) {

src/d8.cc

@@ -2831,8 +2831,7 @@ int Shell::Main(int argc, char* argv[]) {
             platform::tracing::TraceWriter::CreateJSONTraceWriter(trace_file));
     tracing_controller->Initialize(trace_buffer);
     if (!i::FLAG_verify_predictable) {
-      platform::SetTracingController(g_platform, tracing_controller.get());
-      tracing_controller.release();
+      platform::SetTracingController(g_platform, tracing_controller.release());
     }
   }
 

src/heap/gc-tracer.cc

@@ -31,8 +31,7 @@ GCTracer::Scope::Scope(GCTracer* tracer, ScopeId scope)
   STATIC_ASSERT(FIRST_INCREMENTAL_SCOPE == 0);
   start_time_ = tracer_->heap_->MonotonicallyIncreasingTimeInMs();
   // TODO(cbruni): remove once we fully moved to a trace-based system.
-  if (TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-      FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     RuntimeCallStats::Enter(
         tracer_->heap_->isolate()->counters()->runtime_call_stats(), &timer_,
         &RuntimeCallStats::GC);
@@ -43,8 +42,7 @@ GCTracer::Scope::~Scope() {
   tracer_->AddScopeSample(
       scope_, tracer_->heap_->MonotonicallyIncreasingTimeInMs() - start_time_);
   // TODO(cbruni): remove once we fully moved to a trace-based system.
-  if (TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-      FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     RuntimeCallStats::Leave(
         tracer_->heap_->isolate()->counters()->runtime_call_stats(), &timer_);
   }
@@ -205,8 +203,7 @@ void GCTracer::Start(GarbageCollector collector,
                                                           committed_memory);
   counters->aggregated_memory_heap_used()->AddSample(start_time, used_memory);
   // TODO(cbruni): remove once we fully moved to a trace-based system.
-  if (TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-      FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     RuntimeCallStats::Enter(heap_->isolate()->counters()->runtime_call_stats(),
                             &timer_, &RuntimeCallStats::GC);
   }
@@ -296,8 +293,7 @@ void GCTracer::Stop(GarbageCollector collector) {
   }
 
   // TODO(cbruni): remove once we fully moved to a trace-based system.
-  if (TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() ||
-      FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     RuntimeCallStats::Leave(heap_->isolate()->counters()->runtime_call_stats(),
                             &timer_);
   }

src/ic/handler-compiler.cc

@@ -212,7 +212,7 @@ Handle<Code> NamedLoadHandlerCompiler::CompileLoadNonexistent(
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
     Handle<Name> name, Handle<AccessorInfo> callback, Handle<Code> slow_stub) {
-  if (FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     GenerateTailCall(masm(), slow_stub);
   }
   Register reg = Frontend(name);
@@ -224,7 +224,7 @@ Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
     Handle<Name> name, const CallOptimization& call_optimization,
     int accessor_index, Handle<Code> slow_stub) {
   DCHECK(call_optimization.is_simple_api_call());
-  if (FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     GenerateTailCall(masm(), slow_stub);
   }
   Register holder = Frontend(name);
@@ -578,7 +578,7 @@ Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback(
     Handle<JSObject> object, Handle<Name> name,
     const CallOptimization& call_optimization, int accessor_index,
     Handle<Code> slow_stub) {
-  if (FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     GenerateTailCall(masm(), slow_stub);
   }
   Register holder = Frontend(name);

src/ic/ic.cc

@@ -2986,7 +2986,7 @@ RUNTIME_FUNCTION(Runtime_StoreCallbackProperty) {
   CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode, 5);
   HandleScope scope(isolate);
 
-  if (FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats)) {
     RETURN_RESULT_OR_FAILURE(
         isolate, Runtime::SetObjectProperty(isolate, receiver, name, value,
                                             language_mode));

src/isolate.cc

@@ -42,6 +42,7 @@
 #include "src/runtime-profiler.h"
 #include "src/simulator.h"
 #include "src/snapshot/deserializer.h"
+#include "src/tracing/tracing-category-observer.h"
 #include "src/v8.h"
 #include "src/version.h"
 #include "src/vm-state-inl.h"
@@ -2737,8 +2738,8 @@ void Isolate::DumpAndResetCompilationStats() {
   turbo_statistics_ = nullptr;
   delete hstatistics_;
   hstatistics_ = nullptr;
-  if (FLAG_runtime_call_stats &&
-      !TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED()) {
+  if (V8_UNLIKELY(FLAG_runtime_stats ==
+                  v8::tracing::TracingCategoryObserver::ENABLED_BY_NATIVE)) {
     OFStream os(stdout);
     counters()->runtime_call_stats()->Print(os);
     counters()->runtime_call_stats()->Reset();

src/log.cc

@@ -27,6 +27,7 @@
 #include "src/runtime-profiler.h"
 #include "src/source-position-table.h"
 #include "src/string-stream.h"
+#include "src/tracing/tracing-category-observer.h"
 #include "src/vm-state-inl.h"
 
 namespace v8 {
@@ -1283,7 +1284,8 @@ void Logger::RuntimeCallTimerEvent() {
 
 void Logger::TickEvent(v8::TickSample* sample, bool overflow) {
   if (!log_->IsEnabled() || !FLAG_prof_cpp) return;
-  if (FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats ==
+                  v8::tracing::TracingCategoryObserver::ENABLED_BY_NATIVE)) {
     RuntimeCallTimerEvent();
   }
   Log::MessageBuilder msg(log_);

src/tracing/trace-event.cc

@@ -15,10 +15,6 @@ namespace v8 {
 namespace internal {
 namespace tracing {
 
-// A global flag used as a shortcut to check for the
-// v8.runtime-call-stats category due to its high frequency use.
-base::Atomic32 kRuntimeCallStatsTracingEnabled = false;
-
 v8::Platform* TraceEventHelper::GetCurrentPlatform() {
   return v8::internal::V8::GetCurrentPlatform();
 }

src/tracing/trace-event.h

@@ -249,20 +249,10 @@ enum CategoryGroupEnabledFlags {
   INTERNAL_TRACE_EVENT_UID(ScopedContext)                                  \
   INTERNAL_TRACE_EVENT_UID(scoped_context)(context);
 
-#define TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_ENABLED() \
-  base::NoBarrier_Load(&v8::internal::tracing::kRuntimeCallStatsTracingEnabled)
-
 #define TRACE_EVENT_CALL_STATS_SCOPED(isolate, category_group, name) \
   INTERNAL_TRACE_EVENT_CALL_STATS_SCOPED(isolate, category_group, name)
 
 #define INTERNAL_TRACE_EVENT_CALL_STATS_SCOPED(isolate, category_group, name)  \
-  {                                                                            \
-    INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(                                    \
-        TRACE_DISABLED_BY_DEFAULT("v8.runtime_stats"));                        \
-    base::NoBarrier_Store(                                                     \
-        &v8::internal::tracing::kRuntimeCallStatsTracingEnabled,               \
-        INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE());     \
-  }                                                                            \
   INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group);                      \
   v8::internal::tracing::CallStatsScopedTracer INTERNAL_TRACE_EVENT_UID(       \
       tracer);                                                                 \

src/tracing/tracing-category-observer.cc

@@ -17,6 +17,7 @@ void TracingCategoryObserver::SetUp() {
   TracingCategoryObserver::instance_ = new TracingCategoryObserver();
   v8::internal::V8::GetCurrentPlatform()->AddTraceStateObserver(
       TracingCategoryObserver::instance_);
+  TRACE_EVENT_WARMUP_CATEGORY(TRACE_DISABLED_BY_DEFAULT("v8.runtime_stats"));
 }
 
 void TracingCategoryObserver::TearDown() {