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// Copyright (c) 2006-2008 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 "base/file_util.h"
#include "base/histogram.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "base/time.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/first_run.h"
#include "chrome/browser/jankometer.h"
#include "chrome/browser/metrics_service.h"
#include "chrome/browser/plugin_process_host.h"
#include "chrome/browser/plugin_service.h"
#include "chrome/browser/render_process_host.h"
#include "chrome/browser/render_view_host.h"
#include "chrome/browser/render_widget_host.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/pref_service.h"
#include "chrome/common/resource_bundle.h"
#include "chrome/browser/plugin_service.h"
#include "net/dns_global.h"
using base::Time;
using base::TimeDelta;
namespace browser_shutdown {
Time shutdown_started_;
ShutdownType shutdown_type_ = NOT_VALID;
int shutdown_num_processes_;
int shutdown_num_processes_slow_;
const wchar_t* const kShutdownMsFile = L"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);
}
void OnShutdownStarting(ShutdownType type) {
// TODO(erikkay): http://b/753080 when onbeforeunload is supported at
// shutdown, fix this to allow these variables to be reset.
if (shutdown_type_ == NOT_VALID) {
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_num_processes_ = static_cast<int>(RenderProcessHost::size());
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_slow_ = 0;
for (RenderProcessHost::iterator hosts = RenderProcessHost::begin();
hosts != RenderProcessHost::end();
++hosts) {
RenderProcessHost* rph = hosts->second;
if (!rph->FastShutdownIfPossible())
// TODO(ojan): I think now that we deal with beforeunload/unload
// higher up, it's not possible to get here. Confirm this and change
// FastShutdownIfPossible to just be FastShutdown.
shutdown_num_processes_slow_++;
}
}
}
std::wstring GetShutdownMsPath() {
std::wstring shutdown_ms_file;
PathService::Get(base::DIR_TEMP, &shutdown_ms_file);
file_util::AppendToPath(&shutdown_ms_file, kShutdownMsFile);
return shutdown_ms_file;
}
void Shutdown() {
// 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.
::SetEvent(g_browser_process->shutdown_event());
PluginService* plugin_service = PluginService::GetInstance();
if (plugin_service) {
plugin_service->Shutdown();
}
PrefService* prefs = g_browser_process->local_state();
chrome_browser_net::SaveHostNamesForNextStartup(prefs);
MetricsService* metrics = g_browser_process->metrics_service();
if (metrics) {
metrics->RecordCleanShutdown();
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_);
}
prefs->SavePersistentPrefs(g_browser_process->file_thread());
// The jank'o'meter requires that the browser process has been destroyed
// before calling UninstallJankometer().
delete g_browser_process;
g_browser_process = NULL;
// Uninstall Jank-O-Meter here after the IO thread is no longer running.
UninstallJankometer();
ResourceBundle::CleanupSharedInstance();
if (!Upgrade::IsBrowserAlreadyRunning()) {
Upgrade::SwapNewChromeExeIfPresent();
}
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 = Int64ToString(shutdown_delta.InMilliseconds());
int len = static_cast<int>(shutdown_ms.length()) + 1;
std::wstring shutdown_ms_file = GetShutdownMsPath();
file_util::WriteFile(shutdown_ms_file, shutdown_ms.c_str(), len);
}
}
void ReadLastShutdownInfo() {
std::wstring shutdown_ms_file = GetShutdownMsPath();
std::string shutdown_ms_str;
int64 shutdown_ms = 0;
if (file_util::ReadFileToString(shutdown_ms_file, &shutdown_ms_str))
shutdown_ms = StringToInt64(shutdown_ms_str);
DeleteFile(shutdown_ms_file.c_str());
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);
if (type > NOT_VALID && shutdown_ms > 0 && num_procs > 0) {
const wchar_t *time_fmt = L"Shutdown.%ls.time";
const wchar_t *time_per_fmt = L"Shutdown.%ls.time_per_process";
std::wstring time;
std::wstring time_per;
if (type == WINDOW_CLOSE) {
time = StringPrintf(time_fmt, L"window_close");
time_per = StringPrintf(time_per_fmt, L"window_close");
} else if (type == BROWSER_EXIT) {
time = StringPrintf(time_fmt, L"browser_exit");
time_per = StringPrintf(time_per_fmt, L"browser_exit");
} else if (type == END_SESSION) {
time = StringPrintf(time_fmt, L"end_session");
time_per = StringPrintf(time_per_fmt, L"end_session");
} else {
NOTREACHED();
}
if (time.length()) {
// 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(L"Shutdown.renderers.total", num_procs);
UMA_HISTOGRAM_COUNTS_100(L"Shutdown.renderers.slow", num_procs_slow);
}
}
}
} // namespace browser_shutdown
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