forked from chromium/chromium
-
Notifications
You must be signed in to change notification settings - Fork 0
/
browser_process_sub_thread.cc
220 lines (182 loc) · 7.23 KB
/
browser_process_sub_thread.cc
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 (c) 2012 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 "content/browser/browser_process_sub_thread.h"
#include "base/compiler_specific.h"
#include "base/debug/alias.h"
#include "base/metrics/histogram_macros.h"
#include "base/threading/thread_restrictions.h"
#include "base/trace_event/memory_dump_manager.h"
#include "content/browser/browser_child_process_host_impl.h"
#include "content/browser/browser_thread_impl.h"
#include "content/browser/notification_service_impl.h"
#include "content/browser/utility_process_host.h"
#include "content/common/child_process_host_impl.h"
#include "content/public/browser/browser_child_process_host_iterator.h"
#include "content/public/browser/browser_thread_delegate.h"
#include "content/public/common/process_type.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_request.h"
#if defined(OS_ANDROID)
#include "base/android/jni_android.h"
#endif
#if defined(OS_WIN)
#include "base/win/scoped_com_initializer.h"
#endif
namespace content {
namespace {
BrowserThreadDelegate* g_io_thread_delegate = nullptr;
} // namespace
// static
void BrowserThread::SetIOThreadDelegate(BrowserThreadDelegate* delegate) {
// |delegate| can only be set/unset while BrowserThread::IO isn't up.
DCHECK(!BrowserThread::IsThreadInitialized(BrowserThread::IO));
// and it cannot be set twice.
DCHECK(!g_io_thread_delegate || !delegate);
g_io_thread_delegate = delegate;
}
BrowserProcessSubThread::BrowserProcessSubThread(BrowserThread::ID identifier)
: base::Thread(BrowserThreadImpl::GetThreadName(identifier)),
identifier_(identifier) {
// Not bound to creation thread.
DETACH_FROM_THREAD(browser_thread_checker_);
}
BrowserProcessSubThread::~BrowserProcessSubThread() {
Stop();
}
void BrowserProcessSubThread::RegisterAsBrowserThread() {
DCHECK(IsRunning());
DCHECK(!browser_thread_);
browser_thread_.reset(new BrowserThreadImpl(identifier_, task_runner()));
// Unretained(this) is safe as |this| outlives its underlying thread.
task_runner()->PostTask(
FROM_HERE,
base::BindOnce(
&BrowserProcessSubThread::CompleteInitializationOnBrowserThread,
Unretained(this)));
}
void BrowserProcessSubThread::AllowBlockingForTesting() {
DCHECK(!IsRunning());
is_blocking_allowed_for_testing_ = true;
}
// static
std::unique_ptr<BrowserProcessSubThread>
BrowserProcessSubThread::CreateIOThread() {
TRACE_EVENT0("startup", "BrowserProcessSubThread::CreateIOThread");
base::Thread::Options options;
options.message_loop_type = base::MessageLoop::TYPE_IO;
#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
// Up the priority of the |io_thread_| as some of its IPCs relate to
// display tasks.
options.priority = base::ThreadPriority::DISPLAY;
#endif
std::unique_ptr<BrowserProcessSubThread> io_thread(
new BrowserProcessSubThread(BrowserThread::IO));
if (!io_thread->StartWithOptions(options))
LOG(FATAL) << "Failed to start BrowserThread:IO";
return io_thread;
}
void BrowserProcessSubThread::Init() {
DCHECK_CALLED_ON_VALID_THREAD(browser_thread_checker_);
#if defined(OS_WIN)
com_initializer_ = std::make_unique<base::win::ScopedCOMInitializer>();
#endif
if (!is_blocking_allowed_for_testing_) {
base::DisallowUnresponsiveTasks();
}
}
void BrowserProcessSubThread::Run(base::RunLoop* run_loop) {
DCHECK_CALLED_ON_VALID_THREAD(browser_thread_checker_);
#if defined(OS_ANDROID)
// Not to reset thread name to "Thread-???" by VM, attach VM with thread name.
// Though it may create unnecessary VM thread objects, keeping thread name
// gives more benefit in debugging in the platform.
if (!thread_name().empty()) {
base::android::AttachCurrentThreadWithName(thread_name());
}
#endif
switch (identifier_) {
case BrowserThread::UI:
// The main thread is usually promoted as the UI thread and doesn't go
// through Run() but some tests do run a separate UI thread.
UIThreadRun(run_loop);
break;
case BrowserThread::IO:
IOThreadRun(run_loop);
return;
case BrowserThread::ID_COUNT:
NOTREACHED();
break;
}
}
void BrowserProcessSubThread::CleanUp() {
DCHECK_CALLED_ON_VALID_THREAD(browser_thread_checker_);
// Run extra cleanup if this thread represents BrowserThread::IO.
if (BrowserThread::CurrentlyOn(BrowserThread::IO))
IOThreadCleanUp();
if (identifier_ == BrowserThread::IO && g_io_thread_delegate)
g_io_thread_delegate->CleanUp();
notification_service_.reset();
#if defined(OS_WIN)
com_initializer_.reset();
#endif
}
void BrowserProcessSubThread::CompleteInitializationOnBrowserThread() {
DCHECK_CALLED_ON_VALID_THREAD(browser_thread_checker_);
notification_service_ = std::make_unique<NotificationServiceImpl>();
if (identifier_ == BrowserThread::IO && g_io_thread_delegate) {
// Allow blocking calls while initializing the IO thread.
base::ScopedAllowBlocking allow_blocking_for_init;
g_io_thread_delegate->Init();
}
}
// Mark following two functions as NOINLINE so the compiler doesn't merge
// them together.
NOINLINE void BrowserProcessSubThread::UIThreadRun(base::RunLoop* run_loop) {
const int line_number = __LINE__;
Thread::Run(run_loop);
base::debug::Alias(&line_number);
}
NOINLINE void BrowserProcessSubThread::IOThreadRun(base::RunLoop* run_loop) {
const int line_number = __LINE__;
Thread::Run(run_loop);
base::debug::Alias(&line_number);
}
void BrowserProcessSubThread::IOThreadCleanUp() {
DCHECK_CALLED_ON_VALID_THREAD(browser_thread_checker_);
// Kill all things that might be holding onto
// net::URLRequest/net::URLRequestContexts.
// Destroy all URLRequests started by URLFetchers.
net::URLFetcher::CancelAll();
for (BrowserChildProcessHostIterator it(PROCESS_TYPE_UTILITY); !it.Done();
++it) {
UtilityProcessHost* utility_process =
static_cast<UtilityProcessHost*>(it.GetDelegate());
if (utility_process->sandbox_type() ==
service_manager::SANDBOX_TYPE_NETWORK) {
// This ensures that cookies and cache are flushed to disk on shutdown.
// https://crbug.com/841001
const int kMaxSecondsToWaitForNetworkProcess = 10;
ChildProcessHostImpl* child_process =
static_cast<ChildProcessHostImpl*>(it.GetHost());
auto& process = child_process->peer_process();
if (!process.IsValid())
continue;
base::ScopedAllowBaseSyncPrimitives scoped_allow_base_sync_primitives;
const base::TimeTicks start_time = base::TimeTicks::Now();
process.WaitForExitWithTimeout(
base::TimeDelta::FromSeconds(kMaxSecondsToWaitForNetworkProcess),
nullptr);
// Record time spent for the method call.
base::TimeDelta network_wait_time = base::TimeTicks::Now() - start_time;
UMA_HISTOGRAM_TIMES("NetworkService.ShutdownTime", network_wait_time);
LOG(ERROR) << "Waited " << network_wait_time.InMilliseconds()
<< " ms for network service";
}
}
// If any child processes are still running, terminate them and
// and delete the BrowserChildProcessHost instances to release whatever
// IO thread only resources they are referencing.
BrowserChildProcessHostImpl::TerminateAll();
}
} // namespace content