Line data    Source code

       1             : // Copyright 2016 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include "src/tracing/tracing-category-observer.h"
       6             : 
       7             : #include "src/base/atomic-utils.h"
       8             : #include "src/counters.h"
       9             : #include "src/tracing/trace-event.h"
      10             : #include "src/v8.h"
      11             : 
      12             : namespace v8 {
      13             : namespace tracing {
      14             : 
      15             : TracingCategoryObserver* TracingCategoryObserver::instance_ = nullptr;
      16             : 
      17       60098 : void TracingCategoryObserver::SetUp() {
      18      120196 :   TracingCategoryObserver::instance_ = new TracingCategoryObserver();
      19      120196 :   i::V8::GetCurrentPlatform()->GetTracingController()->AddTraceStateObserver(
      20      120196 :       TracingCategoryObserver::instance_);
      21       60098 : }
      22             : 
      23       58953 : void TracingCategoryObserver::TearDown() {
      24      117906 :   i::V8::GetCurrentPlatform()->GetTracingController()->RemoveTraceStateObserver(
      25      117906 :       TracingCategoryObserver::instance_);
      26       58953 :   delete TracingCategoryObserver::instance_;
      27       58953 : }
      28             : 
      29           6 : void TracingCategoryObserver::OnTraceEnabled() {
      30             :   bool enabled = false;
      31          12 :   TRACE_EVENT_CATEGORY_GROUP_ENABLED(
      32             :       TRACE_DISABLED_BY_DEFAULT("v8.runtime_stats"), &enabled);
      33           6 :   if (enabled) {
      34             :     i::TracingFlags::runtime_stats.fetch_or(ENABLED_BY_TRACING,
      35             :                                             std::memory_order_relaxed);
      36             :   }
      37          12 :   TRACE_EVENT_CATEGORY_GROUP_ENABLED(
      38             :       TRACE_DISABLED_BY_DEFAULT("v8.runtime_stats_sampling"), &enabled);
      39           6 :   if (enabled) {
      40             :     i::TracingFlags::runtime_stats.fetch_or(ENABLED_BY_SAMPLING,
      41             :                                             std::memory_order_relaxed);
      42             :   }
      43          12 :   TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("v8.gc_stats"),
      44             :                                      &enabled);
      45           6 :   if (enabled) {
      46             :     i::TracingFlags::gc_stats.fetch_or(ENABLED_BY_TRACING,
      47             :                                        std::memory_order_relaxed);
      48             :   }
      49          12 :   TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("v8.ic_stats"),
      50             :                                      &enabled);
      51           6 :   if (enabled) {
      52             :     i::TracingFlags::ic_stats.fetch_or(ENABLED_BY_TRACING,
      53             :                                        std::memory_order_relaxed);
      54             :   }
      55           6 : }
      56             : 
      57           5 : void TracingCategoryObserver::OnTraceDisabled() {
      58             :   i::TracingFlags::runtime_stats.fetch_and(
      59             :       ~(ENABLED_BY_TRACING | ENABLED_BY_SAMPLING), std::memory_order_relaxed);
      60             : 
      61             :   i::TracingFlags::gc_stats.fetch_and(~ENABLED_BY_TRACING,
      62             :                                       std::memory_order_relaxed);
      63             : 
      64             :   i::TracingFlags::ic_stats.fetch_and(~ENABLED_BY_TRACING,
      65             :                                       std::memory_order_relaxed);
      66           5 : }
      67             : 
      68             : }  // namespace tracing
      69      120216 : }  // namespace v8