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
|
// Copyright 2017 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 "base/process/process.h"
#include <magenta/process.h>
#include <magenta/syscalls.h>
#include "base/debug/activity_tracker.h"
namespace base {
Process::Process(ProcessHandle handle)
: process_(handle), is_current_process_(false) {
CHECK_NE(handle, mx_process_self());
}
Process::~Process() {
Close();
}
Process::Process(Process&& other)
: process_(other.process_), is_current_process_(other.is_current_process_) {
other.process_ = kNullProcessHandle;
}
Process& Process::operator=(Process&& other) {
process_ = other.process_;
other.process_ = kNullProcessHandle;
is_current_process_ = other.is_current_process_;
return *this;
}
// static
Process Process::Current() {
Process process;
process.is_current_process_ = true;
return process;
}
// static
Process Process::Open(ProcessId pid) {
if (pid == GetCurrentProcId())
return Current();
// While a process with object id |pid| might exist, the job returned by
// mx_job_default() might not contain it, so this call can fail.
mx_handle_t handle;
mx_status_t status =
mx_object_get_child(mx_job_default(), pid, MX_RIGHT_SAME_RIGHTS, &handle);
if (status != NO_ERROR) {
DLOG(ERROR) << "mx_object_get_child failed: " << status;
return Process();
}
return Process(handle);
}
// static
Process Process::OpenWithExtraPrivileges(ProcessId pid) {
// No privileges to set.
return Open(pid);
}
// static
Process Process::DeprecatedGetProcessFromHandle(ProcessHandle handle) {
DCHECK_NE(handle, GetCurrentProcessHandle());
mx_handle_t out;
if (mx_handle_duplicate(handle, MX_RIGHT_SAME_RIGHTS, &out) != NO_ERROR) {
DLOG(ERROR) << "mx_handle_duplicate failed: " << handle;
return Process();
}
return Process(out);
}
// static
bool Process::CanBackgroundProcesses() {
return false;
}
// static
void Process::TerminateCurrentProcessImmediately(int exit_code) {
_exit(exit_code);
}
bool Process::IsValid() const {
return process_ != kNullProcessHandle || is_current();
}
ProcessHandle Process::Handle() const {
return is_current_process_ ? mx_process_self() : process_;
}
Process Process::Duplicate() const {
if (is_current())
return Current();
if (!IsValid())
return Process();
mx_handle_t out;
if (mx_handle_duplicate(process_, MX_RIGHT_SAME_RIGHTS, &out) != NO_ERROR) {
DLOG(ERROR) << "mx_handle_duplicate failed: " << process_;
return Process();
}
return Process(out);
}
ProcessId Process::Pid() const {
DCHECK(IsValid());
return GetProcId(process_);
}
bool Process::is_current() const {
return is_current_process_;
}
void Process::Close() {
is_current_process_ = false;
if (IsValid()) {
mx_status_t status = mx_handle_close(process_);
DCHECK_EQ(status, NO_ERROR);
process_ = kNullProcessHandle;
}
}
bool Process::Terminate(int exit_code, bool wait) const {
// exit_code isn't supportable.
mx_status_t status = mx_task_kill(process_);
if (status == NO_ERROR && wait) {
mx_signals_t signals;
status = mx_object_wait_one(process_, MX_TASK_TERMINATED,
mx_deadline_after(MX_SEC(60)), &signals);
if (status != NO_ERROR) {
DLOG(ERROR) << "Error waiting for process exit: " << status;
} else {
DCHECK(signals & MX_TASK_TERMINATED);
}
} else if (status != NO_ERROR) {
DLOG(ERROR) << "Unable to terminate process: " << status;
}
return status >= 0;
}
bool Process::WaitForExit(int* exit_code) const {
return WaitForExitWithTimeout(TimeDelta::Max(), exit_code);
}
bool Process::WaitForExitWithTimeout(TimeDelta timeout, int* exit_code) const {
// Record the event that this thread is blocking upon (for hang diagnosis).
base::debug::ScopedProcessWaitActivity process_activity(this);
mx_time_t mxtimeout_nanos =
timeout == TimeDelta::Max() ? MX_TIME_INFINITE : timeout.InNanoseconds();
mx_signals_t signals_observed;
mx_status_t status = mx_object_wait_one(process_, MX_TASK_TERMINATED,
mxtimeout_nanos, &signals_observed);
*exit_code = -1;
if (status != NO_ERROR && status != ERR_TIMED_OUT)
return false;
if (status == ERR_TIMED_OUT && !signals_observed)
return false;
mx_info_process_t proc_info;
status = mx_object_get_info(process_, MX_INFO_PROCESS, &proc_info,
sizeof(proc_info), nullptr, nullptr);
if (status != NO_ERROR)
return status;
*exit_code = proc_info.return_code;
return true;
}
bool Process::IsProcessBackgrounded() const {
// See SetProcessBackgrounded().
DCHECK(IsValid());
return false;
}
bool Process::SetProcessBackgrounded(bool value) {
// No process priorities on Fuchsia. TODO(fuchsia): See MG-783, and update
// this later if priorities are implemented.
return false;
}
int Process::GetPriority() const {
DCHECK(IsValid());
// No process priorities on Fuchsia.
return 0;
}
} // namespace base
|
