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// Copyright (c) 2011 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 "chrome/browser/browser_shutdown.h"
#include <map>
#include <string>
#include "base/command_line.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/metrics/histogram.h"
#include "base/path_service.h"
#include "base/process_util.h"
#include "base/string_number_conversions.h"
#include "base/string_util.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "base/threading/thread_restrictions.h"
#include "base/time.h"
#include "build/build_config.h"
#include "chrome/browser/about_flags.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/first_run/upgrade_util.h"
#include "chrome/browser/jankometer.h"
#include "chrome/browser/metrics/metrics_service.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/service/service_process_control_manager.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/switch_utils.h"
#include "content/browser/browser_thread.h"
#include "content/browser/plugin_process_host.h"
#include "content/browser/renderer_host/render_process_host.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/renderer_host/render_widget_host.h"
#include "net/predictor_api.h"
#include "ui/base/resource/resource_bundle.h"
#if defined(OS_WIN)
#include "chrome/browser/rlz/rlz.h"
#endif
#if defined(OS_CHROMEOS)
#include "chrome/browser/chromeos/boot_times_loader.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
#include "chrome/browser/chromeos/cros/login_library.h"
#include "chrome/browser/chromeos/system_key_event_listener.h"
#endif
using base::Time;
using base::TimeDelta;
namespace browser_shutdown {
// Whether the browser is trying to quit (e.g., Quit chosen from menu).
bool g_trying_to_quit = false;
Time shutdown_started_;
ShutdownType shutdown_type_ = NOT_VALID;
int shutdown_num_processes_;
int shutdown_num_processes_slow_;
bool delete_resources_on_shutdown = true;
const char kShutdownMsFile[] = "chrome_shutdown_ms.txt";
void RegisterPrefs(PrefService* local_state) {
local_state->RegisterIntegerPref(prefs::kShutdownType, NOT_VALID);
local_state->RegisterIntegerPref(prefs::kShutdownNumProcesses, 0);
local_state->RegisterIntegerPref(prefs::kShutdownNumProcessesSlow, 0);
}
ShutdownType GetShutdownType() {
return shutdown_type_;
}
void OnShutdownStarting(ShutdownType type) {
if (shutdown_type_ != NOT_VALID)
return;
shutdown_type_ = type;
// For now, we're only counting the number of renderer processes
// since we can't safely count the number of plugin processes from this
// thread, and we'd really like to avoid anything which might add further
// delays to shutdown time.
shutdown_started_ = Time::Now();
// Call FastShutdown on all of the RenderProcessHosts. This will be
// a no-op in some cases, so we still need to go through the normal
// shutdown path for the ones that didn't exit here.
shutdown_num_processes_ = 0;
shutdown_num_processes_slow_ = 0;
for (RenderProcessHost::iterator i(RenderProcessHost::AllHostsIterator());
!i.IsAtEnd(); i.Advance()) {
++shutdown_num_processes_;
if (!i.GetCurrentValue()->FastShutdownIfPossible())
++shutdown_num_processes_slow_;
}
}
FilePath GetShutdownMsPath() {
FilePath shutdown_ms_file;
PathService::Get(chrome::DIR_USER_DATA, &shutdown_ms_file);
return shutdown_ms_file.AppendASCII(kShutdownMsFile);
}
void Shutdown() {
#if defined(OS_CHROMEOS)
chromeos::BootTimesLoader::Get()->AddLogoutTimeMarker(
"BrowserShutdownStarted", false);
#endif
// During shutdown we will end up some blocking operations. But the
// work needs to get done and we're going to wait for them no matter
// what thread they're on, so don't worry about it slowing down
// shutdown.
base::ThreadRestrictions::SetIOAllowed(true);
// Shutdown all IPC channels to service processes.
ServiceProcessControlManager::GetInstance()->Shutdown();
#if defined(OS_CHROMEOS)
// The system key event listener needs to be shut down earlier than when
// Singletons are finally destroyed in AtExitManager.
chromeos::SystemKeyEventListener::GetInstance()->Stop();
#endif
// WARNING: During logoff/shutdown (WM_ENDSESSION) we may not have enough
// time to get here. If you have something that *must* happen on end session,
// consider putting it in BrowserProcessImpl::EndSession.
DCHECK(g_browser_process);
// Notifies we are going away.
g_browser_process->shutdown_event()->Signal();
PrefService* prefs = g_browser_process->local_state();
ProfileManager* profile_manager = g_browser_process->profile_manager();
PrefService* user_prefs = profile_manager->GetDefaultProfile()->GetPrefs();
chrome_browser_net::SavePredictorStateForNextStartupAndTrim(user_prefs);
MetricsService* metrics = g_browser_process->metrics_service();
if (metrics)
metrics->RecordCompletedSessionEnd();
if (shutdown_type_ > NOT_VALID && shutdown_num_processes_ > 0) {
// Record the shutdown info so that we can put it into a histogram at next
// startup.
prefs->SetInteger(prefs::kShutdownType, shutdown_type_);
prefs->SetInteger(prefs::kShutdownNumProcesses, shutdown_num_processes_);
prefs->SetInteger(prefs::kShutdownNumProcessesSlow,
shutdown_num_processes_slow_);
}
// Check local state for the restart flag so we can restart the session below.
bool restart_last_session = false;
if (prefs->HasPrefPath(prefs::kRestartLastSessionOnShutdown)) {
restart_last_session =
prefs->GetBoolean(prefs::kRestartLastSessionOnShutdown);
prefs->ClearPref(prefs::kRestartLastSessionOnShutdown);
}
prefs->SavePersistentPrefs();
#if defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)
// Cleanup any statics created by RLZ. Must be done before NotificationService
// is destroyed.
RLZTracker::CleanupRlz();
#endif
// The jank'o'meter requires that the browser process has been destroyed
// before calling UninstallJankometer().
delete g_browser_process;
g_browser_process = NULL;
#if defined(OS_CHROMEOS)
chromeos::BootTimesLoader::Get()->AddLogoutTimeMarker("BrowserDeleted",
true);
#endif
// Uninstall Jank-O-Meter here after the IO thread is no longer running.
UninstallJankometer();
if (delete_resources_on_shutdown)
ResourceBundle::CleanupSharedInstance();
#if defined(OS_WIN)
if (!upgrade_util::IsBrowserAlreadyRunning() &&
shutdown_type_ != browser_shutdown::END_SESSION) {
upgrade_util::SwapNewChromeExeIfPresent();
}
#endif
if (restart_last_session) {
#if !defined(OS_CHROMEOS)
// Make sure to relaunch the browser with the original command line plus
// the Restore Last Session flag. Note that Chrome can be launched (ie.
// through ShellExecute on Windows) with a switch argument terminator at
// the end (double dash, as described in b/1366444) plus a URL,
// which prevents us from appending to the command line directly (issue
// 46182). We therefore use GetSwitches to copy the command line (it stops
// at the switch argument terminator).
CommandLine old_cl(*CommandLine::ForCurrentProcess());
scoped_ptr<CommandLine> new_cl(new CommandLine(old_cl.GetProgram()));
std::map<std::string, CommandLine::StringType> switches =
old_cl.GetSwitches();
// Remove the switches that shouldn't persist across restart.
about_flags::RemoveFlagsSwitches(&switches);
switches::RemoveSwitchesForAutostart(&switches);
// Append the old switches to the new command line.
for (std::map<std::string, CommandLine::StringType>::const_iterator i =
switches.begin(); i != switches.end(); ++i) {
CommandLine::StringType switch_value = i->second;
if (!switch_value.empty())
new_cl->AppendSwitchNative(i->first, i->second);
else
new_cl->AppendSwitch(i->first);
}
// Ensure restore last session is set.
if (!new_cl->HasSwitch(switches::kRestoreLastSession))
new_cl->AppendSwitch(switches::kRestoreLastSession);
#if defined(OS_WIN) || defined(OS_LINUX)
upgrade_util::RelaunchChromeBrowser(*new_cl.get());
#endif // defined(OS_WIN) || defined(OS_LINUX)
#if defined(OS_MACOSX)
new_cl->AppendSwitch(switches::kActivateOnLaunch);
base::LaunchApp(*new_cl.get(), false, false, NULL);
#endif // defined(OS_MACOSX)
#else
NOTIMPLEMENTED();
#endif // !defined(OS_CHROMEOS)
}
if (shutdown_type_ > NOT_VALID && shutdown_num_processes_ > 0) {
// Measure total shutdown time as late in the process as possible
// and then write it to a file to be read at startup.
// We can't use prefs since all services are shutdown at this point.
TimeDelta shutdown_delta = Time::Now() - shutdown_started_;
std::string shutdown_ms =
base::Int64ToString(shutdown_delta.InMilliseconds());
int len = static_cast<int>(shutdown_ms.length()) + 1;
FilePath shutdown_ms_file = GetShutdownMsPath();
file_util::WriteFile(shutdown_ms_file, shutdown_ms.c_str(), len);
}
#if defined(OS_CHROMEOS)
BrowserList::NotifyAndTerminate(false);
#endif
ChromeURLDataManager::DeleteDataSources();
}
void ReadLastShutdownFile(
ShutdownType type,
int num_procs,
int num_procs_slow) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
FilePath shutdown_ms_file = GetShutdownMsPath();
std::string shutdown_ms_str;
int64 shutdown_ms = 0;
if (file_util::ReadFileToString(shutdown_ms_file, &shutdown_ms_str))
base::StringToInt64(shutdown_ms_str, &shutdown_ms);
file_util::Delete(shutdown_ms_file, false);
if (type == NOT_VALID || shutdown_ms == 0 || num_procs == 0)
return;
const char *time_fmt = "Shutdown.%s.time";
const char *time_per_fmt = "Shutdown.%s.time_per_process";
std::string time;
std::string time_per;
if (type == WINDOW_CLOSE) {
time = StringPrintf(time_fmt, "window_close");
time_per = StringPrintf(time_per_fmt, "window_close");
} else if (type == BROWSER_EXIT) {
time = StringPrintf(time_fmt, "browser_exit");
time_per = StringPrintf(time_per_fmt, "browser_exit");
} else if (type == END_SESSION) {
time = StringPrintf(time_fmt, "end_session");
time_per = StringPrintf(time_per_fmt, "end_session");
} else {
NOTREACHED();
}
if (time.empty())
return;
// TODO(erikkay): change these to UMA histograms after a bit more testing.
UMA_HISTOGRAM_TIMES(time.c_str(),
TimeDelta::FromMilliseconds(shutdown_ms));
UMA_HISTOGRAM_TIMES(time_per.c_str(),
TimeDelta::FromMilliseconds(shutdown_ms / num_procs));
UMA_HISTOGRAM_COUNTS_100("Shutdown.renderers.total", num_procs);
UMA_HISTOGRAM_COUNTS_100("Shutdown.renderers.slow", num_procs_slow);
}
void ReadLastShutdownInfo() {
PrefService* prefs = g_browser_process->local_state();
ShutdownType type =
static_cast<ShutdownType>(prefs->GetInteger(prefs::kShutdownType));
int num_procs = prefs->GetInteger(prefs::kShutdownNumProcesses);
int num_procs_slow = prefs->GetInteger(prefs::kShutdownNumProcessesSlow);
// clear the prefs immediately so we don't pick them up on a future run
prefs->SetInteger(prefs::kShutdownType, NOT_VALID);
prefs->SetInteger(prefs::kShutdownNumProcesses, 0);
prefs->SetInteger(prefs::kShutdownNumProcessesSlow, 0);
// Read and delete the file on the file thread.
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
NewRunnableFunction(
&ReadLastShutdownFile, type, num_procs, num_procs_slow));
}
void SetTryingToQuit(bool quitting) {
g_trying_to_quit = quitting;
}
bool IsTryingToQuit() {
return g_trying_to_quit;
}
bool ShuttingDownWithoutClosingBrowsers() {
#if defined(USE_X11)
if (GetShutdownType() == browser_shutdown::END_SESSION)
return true;
#endif
return false;
}
} // namespace browser_shutdown
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