1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
// Copyright (c) 2009 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 "app/resource_bundle.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/histogram.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "base/thread.h"
#include "base/time.h"
#include "base/waitable_event.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/dom_ui/chrome_url_data_manager.h"
#include "chrome/browser/first_run.h"
#include "chrome/browser/jankometer.h"
#include "chrome/browser/metrics/metrics_service.h"
#include "chrome/browser/plugin_process_host.h"
#include "chrome/browser/renderer_host/render_process_host.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/browser/renderer_host/render_widget_host.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/pref_service.h"
#include "chrome/common/chrome_plugin_lib.h"
#include "net/dns_global.h"
#if defined(OS_WIN)
#include "chrome/browser/rlz/rlz.h"
#endif
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_;
bool delete_resources_on_shutdown = true;
const char* const 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_;
}
}
#if defined(OS_WIN)
FilePath GetShutdownMsPath() {
FilePath shutdown_ms_file;
PathService::Get(base::DIR_TEMP, &shutdown_ms_file);
return shutdown_ms_file.AppendASCII(kShutdownMsFile);
}
#endif
void Shutdown() {
#if defined(OS_MACOSX)
NotificationService::current()->Notify(NotificationType::APP_TERMINATING,
NotificationService::AllSources(),
NotificationService::NoDetails());
#endif
// Unload plugins. This needs to happen on the IO thread.
ChromeThread::PostTask(
ChromeThread::IO, FROM_HERE,
NewRunnableFunction(&ChromePluginLib::UnloadAllPlugins));
// 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();
chrome_browser_net::SaveDnsPrefetchStateForNextStartupAndTrim(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();
#if defined(OS_WIN)
// 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;
// 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::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;
FilePath shutdown_ms_file = GetShutdownMsPath();
file_util::WriteFile(shutdown_ms_file, shutdown_ms.c_str(), len);
}
#endif
UnregisterURLRequestChromeJob();
}
#if defined(OS_WIN)
void ReadLastShutdownFile(
ShutdownType type,
int num_procs,
int num_procs_slow) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::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))
shutdown_ms = StringToInt64(shutdown_ms_str);
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.
ChromeThread::PostTask(
ChromeThread::FILE, FROM_HERE,
NewRunnableFunction(
&ReadLastShutdownFile, type, num_procs, num_procs_slow));
}
#endif
} // namespace browser_shutdown
|
