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
|
// 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/utility_process_host_impl.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/sequenced_task_runner.h"
#include "base/utf_string_conversions.h"
#include "content/browser/browser_child_process_host_impl.h"
#include "content/common/child_process_host_impl.h"
#include "content/common/utility_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/utility_process_host_client.h"
#include "content/public/common/content_switches.h"
#include "ipc/ipc_switches.h"
#include "ui/base/ui_base_switches.h"
#include "webkit/plugins/plugin_switches.h"
namespace content {
UtilityProcessHost* UtilityProcessHost::Create(
UtilityProcessHostClient* client,
base::SequencedTaskRunner* client_task_runner) {
return new UtilityProcessHostImpl(client, client_task_runner);
}
UtilityProcessHostImpl::UtilityProcessHostImpl(
UtilityProcessHostClient* client,
base::SequencedTaskRunner* client_task_runner)
: client_(client),
client_task_runner_(client_task_runner),
is_batch_mode_(false),
no_sandbox_(false),
#if defined(OS_LINUX)
child_flags_(ChildProcessHost::CHILD_ALLOW_SELF),
#else
child_flags_(ChildProcessHost::CHILD_NORMAL),
#endif
use_linux_zygote_(false),
started_(false) {
process_.reset(new BrowserChildProcessHostImpl(PROCESS_TYPE_UTILITY, this));
}
UtilityProcessHostImpl::~UtilityProcessHostImpl() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
DCHECK(!is_batch_mode_);
}
bool UtilityProcessHostImpl::Send(IPC::Message* message) {
if (!StartProcess())
return false;
return process_->Send(message);
}
bool UtilityProcessHostImpl::StartBatchMode() {
CHECK(!is_batch_mode_);
is_batch_mode_ = StartProcess();
Send(new UtilityMsg_BatchMode_Started());
return is_batch_mode_;
}
void UtilityProcessHostImpl::EndBatchMode() {
CHECK(is_batch_mode_);
is_batch_mode_ = false;
Send(new UtilityMsg_BatchMode_Finished());
}
void UtilityProcessHostImpl::SetExposedDir(const base::FilePath& dir) {
exposed_dir_ = dir;
}
void UtilityProcessHostImpl::DisableSandbox() {
no_sandbox_ = true;
}
void UtilityProcessHostImpl::EnableZygote() {
use_linux_zygote_ = true;
}
const ChildProcessData& UtilityProcessHostImpl::GetData() {
return process_->GetData();
}
#if defined(OS_POSIX)
void UtilityProcessHostImpl::SetEnv(const base::EnvironmentVector& env) {
env_ = env;
}
#endif // OS_POSIX
bool UtilityProcessHostImpl::StartProcess() {
if (started_)
return true;
started_ = true;
if (is_batch_mode_)
return true;
// Name must be set or metrics_service will crash in any test which
// launches a UtilityProcessHost.
process_->SetName(ASCIIToUTF16("utility process"));
std::string channel_id = process_->GetHost()->CreateChannel();
if (channel_id.empty())
return false;
const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
int child_flags = child_flags_;
#if defined(OS_POSIX)
bool has_cmd_prefix = browser_command_line.HasSwitch(
switches::kUtilityCmdPrefix);
// When running under gdb, forking /proc/self/exe ends up forking the gdb
// executable instead of Chromium. It is almost safe to assume that no
// updates will happen while a developer is running with
// |switches::kUtilityCmdPrefix|. See ChildProcessHost::GetChildPath() for
// a similar case with Valgrind.
if (has_cmd_prefix)
child_flags = ChildProcessHost::CHILD_NORMAL;
#endif
base::FilePath exe_path = ChildProcessHost::GetChildPath(child_flags);
if (exe_path.empty()) {
NOTREACHED() << "Unable to get utility process binary name.";
return false;
}
CommandLine* cmd_line = new CommandLine(exe_path);
cmd_line->AppendSwitchASCII(switches::kProcessType,
switches::kUtilityProcess);
cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
std::string locale = GetContentClient()->browser()->GetApplicationLocale();
cmd_line->AppendSwitchASCII(switches::kLang, locale);
if (browser_command_line.HasSwitch(switches::kChromeFrame))
cmd_line->AppendSwitch(switches::kChromeFrame);
if (no_sandbox_ || browser_command_line.HasSwitch(switches::kNoSandbox))
cmd_line->AppendSwitch(switches::kNoSandbox);
#if defined(OS_MACOSX)
if (browser_command_line.HasSwitch(switches::kEnableSandboxLogging))
cmd_line->AppendSwitch(switches::kEnableSandboxLogging);
#endif
if (browser_command_line.HasSwitch(switches::kDebugPluginLoading))
cmd_line->AppendSwitch(switches::kDebugPluginLoading);
#if defined(OS_POSIX)
// TODO(port): Sandbox this on Linux. Also, zygote this to work with
// Linux updating.
if (has_cmd_prefix) {
// launch the utility child process with some prefix (usually "xterm -e gdb
// --args").
cmd_line->PrependWrapper(browser_command_line.GetSwitchValueNative(
switches::kUtilityCmdPrefix));
}
cmd_line->AppendSwitchPath(switches::kUtilityProcessAllowedDir, exposed_dir_);
#endif
bool use_zygote = false;
#if defined(OS_LINUX)
use_zygote = !no_sandbox_ && use_linux_zygote_;
#endif
process_->Launch(
#if defined(OS_WIN)
exposed_dir_,
#elif defined(OS_POSIX)
use_zygote,
env_,
#endif
cmd_line);
return true;
}
bool UtilityProcessHostImpl::OnMessageReceived(const IPC::Message& message) {
client_task_runner_->PostTask(
FROM_HERE,
base::Bind(base::IgnoreResult(
&UtilityProcessHostClient::OnMessageReceived), client_.get(),
message));
return true;
}
void UtilityProcessHostImpl::OnProcessCrashed(int exit_code) {
client_task_runner_->PostTask(
FROM_HERE,
base::Bind(&UtilityProcessHostClient::OnProcessCrashed, client_.get(),
exit_code));
}
} // namespace content
|
