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
|
/* Copyright 2016 Google Inc. All Rights Reserved.
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.
==============================================================================*/
#include "tensorflow/core/platform/test.h"
#include <unordered_set>
#include <netinet/in.h>
#include <signal.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include "tensorflow/core/platform/logging.h"
namespace tensorflow {
namespace testing {
namespace {
class PosixSubProcess : public SubProcess {
public:
PosixSubProcess(const std::vector<string>& argv) : argv_(argv), pid_(0) {}
~PosixSubProcess() override {}
bool Start() override {
if (pid_ != 0) {
LOG(ERROR) << "Tried to start process multiple times.";
return false;
}
pid_ = fork();
if (pid_ == 0) {
// We are in the child process.
const char* path = argv_[0].c_str();
const char** argv = new const char*[argv_.size()];
for (int i = 1; i < argv_.size(); ++i) {
argv[i - 1] = argv_[i].c_str();
}
argv[argv_.size() - 1] = nullptr;
execv(path, (char* const*)argv);
// Never executes.
return true;
} else if (pid_ < 0) {
LOG(ERROR) << "Failed to fork process.";
return false;
} else {
// We are in the parent process and fork() was successful.
// TODO(mrry): Consider collecting stderr from the child.
return true;
}
}
bool Kill(int signal) override {
if (pid_ == 0) {
LOG(ERROR) << "Tried to kill process before starting it.";
return false;
}
return kill(pid_, signal) == 0;
}
private:
const std::vector<string> argv_;
pid_t pid_;
TF_DISALLOW_COPY_AND_ASSIGN(PosixSubProcess);
};
} // namespace
std::unique_ptr<SubProcess> CreateSubProcess(const std::vector<string>& argv) {
return std::unique_ptr<SubProcess>(new PosixSubProcess(argv));
}
namespace {
bool IsPortAvailable(int* port, bool is_tcp) {
const int protocol = is_tcp ? IPPROTO_TCP : 0;
const int fd = socket(AF_INET, is_tcp ? SOCK_STREAM : SOCK_DGRAM, protocol);
struct sockaddr_in addr;
socklen_t addr_len = sizeof(addr);
int actual_port;
CHECK_GE(*port, 0);
CHECK_LE(*port, 65535);
if (fd < 0) {
LOG(ERROR) << "socket() failed: " << strerror(errno);
return false;
}
// SO_REUSEADDR lets us start up a server immediately after it exists.
int one = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) {
LOG(ERROR) << "setsockopt() failed: " << strerror(errno);
close(fd);
return false;
}
// Try binding to port.
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = htons((uint16_t)*port);
if (bind(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
LOG(WARNING) << "bind(port=" << *port << ") failed: " << strerror(errno);
close(fd);
return false;
}
// Get the bound port number.
if (getsockname(fd, (struct sockaddr*)&addr, &addr_len) < 0) {
LOG(WARNING) << "getsockname() failed: " << strerror(errno);
close(fd);
return false;
}
CHECK_LE(addr_len, sizeof(addr));
actual_port = ntohs(addr.sin_port);
CHECK_GT(actual_port, 0);
if (*port == 0) {
*port = actual_port;
} else {
CHECK_EQ(*port, actual_port);
}
close(fd);
return true;
}
const int kNumRandomPortsToPick = 100;
const int kMaximumTrials = 1000;
} // namespace
int PickUnusedPortOrDie() {
static std::unordered_set<int> chosen_ports;
// Type of port to first pick in the next iteration.
bool is_tcp = true;
int trial = 0;
while (true) {
int port;
trial++;
CHECK_LE(trial, kMaximumTrials)
<< "Failed to pick an unused port for testing.";
if (trial == 1) {
port = getpid() % (65536 - 30000) + 30000;
} else if (trial <= kNumRandomPortsToPick) {
port = rand() % (65536 - 30000) + 30000;
} else {
port = 0;
}
if (chosen_ports.find(port) != chosen_ports.end()) {
continue;
}
if (!IsPortAvailable(&port, is_tcp)) {
continue;
}
CHECK_GT(port, 0);
if (!IsPortAvailable(&port, !is_tcp)) {
is_tcp = !is_tcp;
continue;
}
chosen_ports.insert(port);
return port;
}
return 0;
}
} // namespace testing
} // namespace tensorflow
|
