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
|
/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "dumpstate"
#include "DumpPool.h"
#include <array>
#include <thread>
#include <log/log.h>
#include "dumpstate.h"
#include "DumpstateInternal.h"
#include "DumpstateUtil.h"
namespace android {
namespace os {
namespace dumpstate {
const std::string DumpPool::PREFIX_TMPFILE_NAME = "dump-tmp.";
DumpPool::DumpPool(const std::string& tmp_root) : tmp_root_(tmp_root), shutdown_(false),
log_duration_(true) {
assert(!tmp_root.empty());
deleteTempFiles(tmp_root_);
}
DumpPool::~DumpPool() {
shutdown();
}
void DumpPool::start(int thread_counts) {
assert(thread_counts > 0);
assert(threads_.empty());
if (thread_counts > MAX_THREAD_COUNT) {
thread_counts = MAX_THREAD_COUNT;
}
MYLOGI("Start thread pool:%d", thread_counts);
shutdown_ = false;
for (int i = 0; i < thread_counts; i++) {
threads_.emplace_back(std::thread([=]() {
setThreadName(pthread_self(), i + 1);
loop();
}));
}
}
void DumpPool::shutdown() {
std::unique_lock lock(lock_);
if (shutdown_ || threads_.empty()) {
return;
}
futures_map_.clear();
while (!tasks_.empty()) tasks_.pop();
shutdown_ = true;
condition_variable_.notify_all();
lock.unlock();
for (auto& thread : threads_) {
thread.join();
}
threads_.clear();
deleteTempFiles(tmp_root_);
MYLOGI("shutdown thread pool");
}
void DumpPool::waitForTask(const std::string& task_name, const std::string& title,
int out_fd) {
DurationReporter duration_reporter("Wait for " + task_name, true);
auto iterator = futures_map_.find(task_name);
if (iterator == futures_map_.end()) {
MYLOGW("Task %s does not exist", task_name.c_str());
return;
}
Future future = iterator->second;
futures_map_.erase(iterator);
std::string result = future.get();
if (result.empty()) {
return;
}
DumpFileToFd(out_fd, title, result);
if (unlink(result.c_str())) {
MYLOGE("Failed to unlink (%s): %s\n", result.c_str(), strerror(errno));
}
}
void DumpPool::deleteTempFiles() {
deleteTempFiles(tmp_root_);
}
void DumpPool::setLogDuration(bool log_duration) {
log_duration_ = log_duration;
}
template <>
void DumpPool::invokeTask<std::function<void()>>(std::function<void()> dump_func,
const std::string& duration_title, int out_fd) {
DurationReporter duration_reporter(duration_title, /*logcat_only =*/!log_duration_,
/*verbose =*/false, out_fd);
std::invoke(dump_func);
}
template <>
void DumpPool::invokeTask<std::function<void(int)>>(std::function<void(int)> dump_func,
const std::string& duration_title, int out_fd) {
DurationReporter duration_reporter(duration_title, /*logcat_only =*/!log_duration_,
/*verbose =*/false, out_fd);
std::invoke(dump_func, out_fd);
}
std::unique_ptr<DumpPool::TmpFile> DumpPool::createTempFile() {
auto tmp_file_ptr = std::make_unique<TmpFile>();
std::string file_name_format = "%s/" + PREFIX_TMPFILE_NAME + "XXXXXX";
snprintf(tmp_file_ptr->path, sizeof(tmp_file_ptr->path), file_name_format.c_str(),
tmp_root_.c_str());
tmp_file_ptr->fd.reset(TEMP_FAILURE_RETRY(
mkostemp(tmp_file_ptr->path, O_CLOEXEC)));
if (tmp_file_ptr->fd.get() == -1) {
MYLOGE("open(%s, %s)\n", tmp_file_ptr->path, strerror(errno));
tmp_file_ptr = nullptr;
return tmp_file_ptr;
}
return tmp_file_ptr;
}
void DumpPool::deleteTempFiles(const std::string& folder) {
std::unique_ptr<DIR, decltype(&closedir)> dir_ptr(opendir(folder.c_str()),
&closedir);
if (!dir_ptr) {
MYLOGE("Failed to opendir (%s): %s\n", folder.c_str(), strerror(errno));
return;
}
int dir_fd = dirfd(dir_ptr.get());
if (dir_fd < 0) {
MYLOGE("Failed to get fd of dir (%s): %s\n", folder.c_str(),
strerror(errno));
return;
}
struct dirent* de;
while ((de = readdir(dir_ptr.get()))) {
if (de->d_type != DT_REG) {
continue;
}
std::string file_name(de->d_name);
if (file_name.find(PREFIX_TMPFILE_NAME) != 0) {
continue;
}
if (unlinkat(dir_fd, file_name.c_str(), 0)) {
MYLOGE("Failed to unlink (%s): %s\n", file_name.c_str(),
strerror(errno));
}
}
}
void DumpPool::setThreadName(const pthread_t thread, int id) {
std::array<char, 15> name;
snprintf(name.data(), name.size(), "dumpstate_%d", id);
pthread_setname_np(thread, name.data());
}
void DumpPool::loop() {
std::unique_lock lock(lock_);
while (!shutdown_) {
if (tasks_.empty()) {
condition_variable_.wait(lock);
continue;
} else {
std::packaged_task<std::string()> task = std::move(tasks_.front());
tasks_.pop();
lock.unlock();
std::invoke(task);
lock.lock();
}
}
}
} // namespace dumpstate
} // namespace os
} // namespace android
|
