// Copyright 2016 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/tracing/tracing-category-observer.h" #include "src/base/atomic-utils.h" #include "src/counters.h" #include "src/tracing/trace-event.h" #include "src/v8.h" namespace v8 { namespace tracing { TracingCategoryObserver* TracingCategoryObserver::instance_ = nullptr; void TracingCategoryObserver::SetUp() { TracingCategoryObserver::instance_ = new TracingCategoryObserver(); i::V8::GetCurrentPlatform()->GetTracingController()->AddTraceStateObserver( TracingCategoryObserver::instance_); } void TracingCategoryObserver::TearDown() { i::V8::GetCurrentPlatform()->GetTracingController()->RemoveTraceStateObserver( TracingCategoryObserver::instance_); delete TracingCategoryObserver::instance_; } void TracingCategoryObserver::OnTraceEnabled() { bool enabled = false; TRACE_EVENT_CATEGORY_GROUP_ENABLED( TRACE_DISABLED_BY_DEFAULT("v8.runtime_stats"), &enabled); if (enabled) { i::TracingFlags::runtime_stats.fetch_or(ENABLED_BY_TRACING, std::memory_order_relaxed); } TRACE_EVENT_CATEGORY_GROUP_ENABLED( TRACE_DISABLED_BY_DEFAULT("v8.runtime_stats_sampling"), &enabled); if (enabled) { i::TracingFlags::runtime_stats.fetch_or(ENABLED_BY_SAMPLING, std::memory_order_relaxed); } TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("v8.gc_stats"), &enabled); if (enabled) { i::TracingFlags::gc_stats.fetch_or(ENABLED_BY_TRACING, std::memory_order_relaxed); } TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("v8.ic_stats"), &enabled); if (enabled) { i::TracingFlags::ic_stats.fetch_or(ENABLED_BY_TRACING, std::memory_order_relaxed); } } void TracingCategoryObserver::OnTraceDisabled() { i::TracingFlags::runtime_stats.fetch_and( ~(ENABLED_BY_TRACING | ENABLED_BY_SAMPLING), std::memory_order_relaxed); i::TracingFlags::gc_stats.fetch_and(~ENABLED_BY_TRACING, std::memory_order_relaxed); i::TracingFlags::ic_stats.fetch_and(~ENABLED_BY_TRACING, std::memory_order_relaxed); } } // namespace tracing } // namespace v8