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
|
// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/tracing/chrome_tracing_delegate.h"
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/json/values_util.h"
#include "base/metrics/histogram_macros.h"
#include "base/no_destructor.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/time/time.h"
#include "base/trace_event/named_trigger.h"
#include "base/values.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser_otr_state.h"
#include "chrome/common/pref_names.h"
#include "components/metrics/metrics_pref_names.h"
#include "components/prefs/pref_service.h"
#include "components/tracing/common/background_tracing_metrics_provider.h"
#include "components/tracing/common/background_tracing_state_manager.h"
#include "components/tracing/common/background_tracing_utils.h"
#include "components/tracing/common/system_profile_metadata_recorder.h"
#include "components/tracing/common/tracing_scenarios_config.h"
#include "components/variations/active_field_trials.h"
#include "components/version_info/version_info.h"
#include "content/public/browser/browser_thread.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/tracing/public/cpp/tracing_features.h"
#if BUILDFLAG(IS_ANDROID)
#include "chrome/browser/ui/android/tab_model/tab_model.h"
#include "chrome/browser/ui/android/tab_model/tab_model_list.h"
#else
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_list.h"
#endif
#if BUILDFLAG(IS_CHROMEOS)
#include "ash/constants/ash_pref_names.h"
#include "chromeos/dbus/constants/dbus_switches.h" // nogncheck
#endif
#if BUILDFLAG(IS_WIN)
#include "base/task/thread_pool.h"
#include "chrome/installer/util/system_tracing_util.h"
#endif
namespace {
using tracing::BackgroundTracingStateManager;
} // namespace
ChromeTracingDelegate::ChromeTracingDelegate() {
// Ensure that this code is called on the UI thread, except for
// tests where a UI thread might not have been initialized at this point.
DCHECK(
content::BrowserThread::CurrentlyOn(content::BrowserThread::UI) ||
!content::BrowserThread::IsThreadInitialized(content::BrowserThread::UI));
#if !BUILDFLAG(IS_ANDROID)
BrowserList::AddObserver(this);
#else
TabModelList::AddObserver(this);
#endif
}
ChromeTracingDelegate::~ChromeTracingDelegate() {
CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
#if !BUILDFLAG(IS_ANDROID)
BrowserList::RemoveObserver(this);
#else
TabModelList::RemoveObserver(this);
#endif
}
#if BUILDFLAG(IS_ANDROID)
void ChromeTracingDelegate::OnTabModelAdded(TabModel* tab_model) {
for (const TabModel* model : TabModelList::models()) {
if (model->GetProfile()->IsOffTheRecord()) {
latest_incognito_launched_ = base::TimeTicks::Now();
base::trace_event::EmitNamedTrigger("incognito-start");
}
}
}
void ChromeTracingDelegate::OnTabModelRemoved(TabModel* tab_model) {
if (!IsOffTheRecordSessionActive()) {
base::trace_event::EmitNamedTrigger("incognito-end");
}
}
#else
void ChromeTracingDelegate::OnBrowserAdded(Browser* browser) {
if (browser->profile()->IsOffTheRecord()) {
latest_incognito_launched_ = base::TimeTicks::Now();
base::trace_event::EmitNamedTrigger("incognito-start");
}
}
void ChromeTracingDelegate::OnBrowserRemoved(Browser* browser) {
if (!IsOffTheRecordSessionActive()) {
base::trace_event::EmitNamedTrigger("incognito-end");
}
}
#endif // BUILDFLAG(IS_ANDROID)
bool ChromeTracingDelegate::IsRecordingAllowed(
bool requires_anonymized_data,
base::TimeTicks session_start) const {
// If the background tracing is specified on the command-line, we allow
// any scenario to be traced and uploaded.
if (!requires_anonymized_data) {
return true;
}
if (IsOffTheRecordSessionActive() ||
session_start <= latest_incognito_launched_) {
UMA_HISTOGRAM_ENUMERATION(
"Tracing.Background.FinalizationDisallowedReason",
TracingFinalizationDisallowedReason::kIncognitoLaunched);
return false;
}
return true;
}
bool ChromeTracingDelegate::ShouldSaveUnuploadedTrace() const {
return true;
}
std::unique_ptr<tracing::BackgroundTracingStateManager>
ChromeTracingDelegate::CreateStateManager() {
return tracing::BackgroundTracingStateManager::CreateInstance(
g_browser_process->local_state());
}
std::string ChromeTracingDelegate::RecordSerializedSystemProfileMetrics()
const {
metrics::SystemProfileProto system_profile_proto;
auto recorder = tracing::BackgroundTracingMetricsProvider::
GetSystemProfileMetricsRecorder();
if (!recorder) {
return std::string();
}
recorder.Run(system_profile_proto);
std::string serialized_system_profile;
system_profile_proto.SerializeToString(&serialized_system_profile);
return serialized_system_profile;
}
tracing::MetadataDataSource::BundleRecorder
ChromeTracingDelegate::CreateSystemProfileMetadataRecorder() const {
return base::BindRepeating(&tracing::RecordSystemProfileMetadata);
}
#if BUILDFLAG(IS_WIN)
void ChromeTracingDelegate::GetSystemTracingState(
base::OnceCallback<void(bool service_supported, bool service_enabled)>
on_tracing_state) {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock{}},
base::BindOnce([]() -> std::pair<bool, bool> {
return {installer::IsSystemTracingServiceSupported(),
installer::IsSystemTracingServiceRegistered()};
}),
base::BindOnce(
[](base::OnceCallback<void(bool service_supported,
bool service_enabled)> on_tracing_state,
std::pair<bool, bool> state) {
std::move(on_tracing_state).Run(state.first, state.second);
},
std::move(on_tracing_state)));
}
void ChromeTracingDelegate::EnableSystemTracing(
base::OnceCallback<void(bool success)> on_complete) {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock{}}, base::BindOnce([]() {
return installer::ElevateAndRegisterSystemTracingService();
}),
std::move(on_complete));
}
void ChromeTracingDelegate::DisableSystemTracing(
base::OnceCallback<void(bool success)> on_complete) {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock{}}, base::BindOnce([]() {
return installer::ElevateAndDeregisterSystemTracingService();
}),
std::move(on_complete));
}
#endif // BUILDFLAG(IS_WIN)
bool ChromeTracingDelegate::IsSystemWideTracingEnabled() {
#if BUILDFLAG(IS_CHROMEOS)
// Always allow system tracing in dev mode images.
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
chromeos::switches::kSystemDevMode)) {
return true;
}
// In non-dev images, honor the pref for system-wide tracing.
PrefService* local_state = g_browser_process->local_state();
DCHECK(local_state);
return local_state->GetBoolean(ash::prefs::kDeviceSystemWideTracingEnabled);
#else
return false;
#endif
}
|
