blob: f5245913d4aa2b226133fc1395c929f71010b79f [file] [log] [blame]
// 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/logging/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"),
&enabled);
if (enabled) {
i::TracingFlags::gc.fetch_or(ENABLED_BY_TRACING, 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.fetch_and(~ENABLED_BY_TRACING, 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