Move //mojo/services tracing & catalog to //services

mojo/services/tracing/tracing_app.cc

-// Copyright 2015 The Chromium 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 "mojo/services/tracing/tracing_app.h"
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <utility>
-
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-
-namespace tracing {
-
-TracingApp::TracingApp() : collector_binding_(this), tracing_active_(false) {
-}
-
-TracingApp::~TracingApp() {
-}
-
-bool TracingApp::AcceptConnection(mojo::Connection* connection) {
-  connection->AddInterface<TraceCollector>(this);
-  connection->AddInterface<StartupPerformanceDataCollector>(this);
-
-  // If someone connects to us they may want to use the TraceCollector
-  // interface and/or they may want to expose themselves to be traced. Attempt
-  // to connect to the TraceProvider interface to see if the application
-  // connecting to us wants to be traced. They can refuse the connection or
-  // close the pipe if not.
-  TraceProviderPtr provider_ptr;
-  connection->GetInterface(&provider_ptr);
-  if (tracing_active_) {
-    TraceRecorderPtr recorder_ptr;
-    recorder_impls_.push_back(
-        new TraceRecorderImpl(GetProxy(&recorder_ptr), sink_.get()));
-    provider_ptr->StartTracing(tracing_categories_, std::move(recorder_ptr));
-  }
-  provider_ptrs_.AddPtr(std::move(provider_ptr));
-  return true;
-}
-
-bool TracingApp::ShellConnectionLost() {
-  // TODO(beng): This is only required because TracingApp isn't run by
-  // ApplicationRunner - instead it's launched automatically by the standalone
-  // shell. It shouldn't be.
-  base::MessageLoop::current()->QuitWhenIdle();
-  return false;
-}
-
-void TracingApp::Create(mojo::Connection* connection,
-                        mojo::InterfaceRequest<TraceCollector> request) {
-  collector_binding_.Bind(std::move(request));
-}
-
-void TracingApp::Create(
-    mojo::Connection* connection,
-    mojo::InterfaceRequest<StartupPerformanceDataCollector> request) {
-  startup_performance_data_collector_bindings_.AddBinding(this,
-                                                          std::move(request));
-}
-
-void TracingApp::Start(mojo::ScopedDataPipeProducerHandle stream,
-                       const mojo::String& categories) {
-  tracing_categories_ = categories;
-  sink_.reset(new TraceDataSink(std::move(stream)));
-  provider_ptrs_.ForAllPtrs([categories, this](TraceProvider* controller) {
-    TraceRecorderPtr ptr;
-    recorder_impls_.push_back(
-        new TraceRecorderImpl(GetProxy(&ptr), sink_.get()));
-    controller->StartTracing(categories, std::move(ptr));
-  });
-  tracing_active_ = true;
-}
-
-void TracingApp::StopAndFlush() {
-  // Remove any collectors that closed their message pipes before we called
-  // StopTracing().
-  for (int i = static_cast<int>(recorder_impls_.size()) - 1; i >= 0; --i) {
-    if (!recorder_impls_[i]->TraceRecorderHandle().is_valid()) {
-      recorder_impls_.erase(recorder_impls_.begin() + i);
-    }
-  }
-
-  tracing_active_ = false;
-  provider_ptrs_.ForAllPtrs(
-      [](TraceProvider* controller) { controller->StopTracing(); });
-
-  // Sending the StopTracing message to registered controllers will request that
-  // they send trace data back via the collector interface and, when they are
-  // done, close the collector pipe. We don't know how long they will take. We
-  // want to read all data that any collector might send until all collectors or
-  // closed or an (arbitrary) deadline has passed. Since the bindings don't
-  // support this directly we do our own MojoWaitMany over the handles and read
-  // individual messages until all are closed or our absolute deadline has
-  // elapsed.
-  static const MojoDeadline kTimeToWaitMicros = 1000 * 1000;
-  MojoTimeTicks end = MojoGetTimeTicksNow() + kTimeToWaitMicros;
-
-  while (!recorder_impls_.empty()) {
-    MojoTimeTicks now = MojoGetTimeTicksNow();
-    if (now >= end)  // Timed out?
-      break;
-
-    MojoDeadline mojo_deadline = end - now;
-    std::vector<mojo::Handle> handles;
-    std::vector<MojoHandleSignals> signals;
-    for (const auto& it : recorder_impls_) {
-      handles.push_back(it->TraceRecorderHandle());
-      signals.push_back(MOJO_HANDLE_SIGNAL_READABLE |
-                        MOJO_HANDLE_SIGNAL_PEER_CLOSED);
-    }
-    std::vector<MojoHandleSignalsState> signals_states(signals.size());
-    const mojo::WaitManyResult wait_many_result =
-        mojo::WaitMany(handles, signals, mojo_deadline, &signals_states);
-    if (wait_many_result.result == MOJO_RESULT_DEADLINE_EXCEEDED) {
-      // Timed out waiting, nothing more to read.
-      LOG(WARNING) << "Timed out waiting for trace flush";
-      break;
-    }
-    if (wait_many_result.IsIndexValid()) {
-      // Iterate backwards so we can remove closed pipes from |recorder_impls_|
-      // without invalidating subsequent offsets.
-      for (size_t i = signals_states.size(); i != 0; --i) {
-        size_t index = i - 1;
-        MojoHandleSignals satisfied = signals_states[index].satisfied_signals;
-        // To avoid dropping data, don't close unless there's no
-        // readable signal.
-        if (satisfied & MOJO_HANDLE_SIGNAL_READABLE)
-          recorder_impls_[index]->TryRead();
-        else if (satisfied & MOJO_HANDLE_SIGNAL_PEER_CLOSED)
-          recorder_impls_.erase(recorder_impls_.begin() + index);
-      }
-    }
-  }
-  AllDataCollected();
-}
-
-void TracingApp::SetShellProcessCreationTime(int64_t time) {
-  if (startup_performance_times_.shell_process_creation_time == 0)
-    startup_performance_times_.shell_process_creation_time = time;
-}
-
-void TracingApp::SetShellMainEntryPointTime(int64_t time) {
-  if (startup_performance_times_.shell_main_entry_point_time == 0)
-    startup_performance_times_.shell_main_entry_point_time = time;
-}
-
-void TracingApp::SetBrowserMessageLoopStartTicks(int64_t ticks) {
-  if (startup_performance_times_.browser_message_loop_start_ticks == 0)
-    startup_performance_times_.browser_message_loop_start_ticks = ticks;
-}
-
-void TracingApp::SetBrowserWindowDisplayTicks(int64_t ticks) {
-  if (startup_performance_times_.browser_window_display_ticks == 0)
-    startup_performance_times_.browser_window_display_ticks = ticks;
-}
-
-void TracingApp::SetBrowserOpenTabsTimeDelta(int64_t delta) {
-  if (startup_performance_times_.browser_open_tabs_time_delta == 0)
-    startup_performance_times_.browser_open_tabs_time_delta = delta;
-}
-
-void TracingApp::SetFirstWebContentsMainFrameLoadTicks(int64_t ticks) {
-  if (startup_performance_times_.first_web_contents_main_frame_load_ticks == 0)
-    startup_performance_times_.first_web_contents_main_frame_load_ticks = ticks;
-}
-
-void TracingApp::SetFirstVisuallyNonEmptyLayoutTicks(int64_t ticks) {
-  if (startup_performance_times_.first_visually_non_empty_layout_ticks == 0)
-    startup_performance_times_.first_visually_non_empty_layout_ticks = ticks;
-}
-
-void TracingApp::GetStartupPerformanceTimes(
-    const GetStartupPerformanceTimesCallback& callback) {
-  callback.Run(startup_performance_times_.Clone());
-}
-
-void TracingApp::AllDataCollected() {
-  recorder_impls_.clear();
-  sink_.reset();
-}
-
-}  // namespace tracing