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
|
//===-- MainLoopTest.cpp --------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/MainLoop.h"
#include "TestingSupport/SubsystemRAII.h"
#include "lldb/Host/ConnectionFileDescriptor.h"
#include "lldb/Host/PseudoTerminal.h"
#include "lldb/Host/common/TCPSocket.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
#include <future>
using namespace lldb_private;
namespace {
class MainLoopTest : public testing::Test {
public:
SubsystemRAII<Socket> subsystems;
void SetUp() override {
bool child_processes_inherit = false;
Status error;
std::unique_ptr<TCPSocket> listen_socket_up(
new TCPSocket(true, child_processes_inherit));
ASSERT_TRUE(error.Success());
error = listen_socket_up->Listen("localhost:0", 5);
ASSERT_TRUE(error.Success());
Socket *accept_socket;
std::future<Status> accept_error = std::async(std::launch::async, [&] {
return listen_socket_up->Accept(accept_socket);
});
std::unique_ptr<TCPSocket> connect_socket_up(
new TCPSocket(true, child_processes_inherit));
error = connect_socket_up->Connect(
llvm::formatv("localhost:{0}", listen_socket_up->GetLocalPortNumber())
.str());
ASSERT_TRUE(error.Success());
ASSERT_TRUE(accept_error.get().Success());
callback_count = 0;
socketpair[0] = std::move(connect_socket_up);
socketpair[1].reset(accept_socket);
}
void TearDown() override {
socketpair[0].reset();
socketpair[1].reset();
}
protected:
MainLoop::Callback make_callback() {
return [&](MainLoopBase &loop) {
++callback_count;
loop.RequestTermination();
};
}
std::shared_ptr<Socket> socketpair[2];
unsigned callback_count;
};
} // namespace
TEST_F(MainLoopTest, ReadObject) {
char X = 'X';
size_t len = sizeof(X);
ASSERT_TRUE(socketpair[0]->Write(&X, len).Success());
MainLoop loop;
Status error;
auto handle = loop.RegisterReadObject(socketpair[1], make_callback(), error);
ASSERT_TRUE(error.Success());
ASSERT_TRUE(handle);
ASSERT_TRUE(loop.Run().Success());
ASSERT_EQ(1u, callback_count);
}
TEST_F(MainLoopTest, TerminatesImmediately) {
char X = 'X';
size_t len = sizeof(X);
ASSERT_TRUE(socketpair[0]->Write(&X, len).Success());
ASSERT_TRUE(socketpair[1]->Write(&X, len).Success());
MainLoop loop;
Status error;
auto handle0 = loop.RegisterReadObject(socketpair[0], make_callback(), error);
ASSERT_TRUE(error.Success());
auto handle1 = loop.RegisterReadObject(socketpair[1], make_callback(), error);
ASSERT_TRUE(error.Success());
ASSERT_TRUE(loop.Run().Success());
ASSERT_EQ(1u, callback_count);
}
#ifdef LLVM_ON_UNIX
TEST_F(MainLoopTest, DetectsEOF) {
PseudoTerminal term;
ASSERT_THAT_ERROR(term.OpenFirstAvailablePrimary(O_RDWR), llvm::Succeeded());
ASSERT_THAT_ERROR(term.OpenSecondary(O_RDWR | O_NOCTTY), llvm::Succeeded());
auto conn = std::make_unique<ConnectionFileDescriptor>(
term.ReleasePrimaryFileDescriptor(), true);
Status error;
MainLoop loop;
auto handle =
loop.RegisterReadObject(conn->GetReadObject(), make_callback(), error);
ASSERT_TRUE(error.Success());
term.CloseSecondaryFileDescriptor();
ASSERT_TRUE(loop.Run().Success());
ASSERT_EQ(1u, callback_count);
}
TEST_F(MainLoopTest, Signal) {
MainLoop loop;
Status error;
auto handle = loop.RegisterSignal(SIGUSR1, make_callback(), error);
ASSERT_TRUE(error.Success());
kill(getpid(), SIGUSR1);
ASSERT_TRUE(loop.Run().Success());
ASSERT_EQ(1u, callback_count);
}
// Test that a signal which is not monitored by the MainLoop does not
// cause a premature exit.
TEST_F(MainLoopTest, UnmonitoredSignal) {
MainLoop loop;
Status error;
struct sigaction sa;
sa.sa_sigaction = [](int, siginfo_t *, void *) { };
sa.sa_flags = SA_SIGINFO; // important: no SA_RESTART
sigemptyset(&sa.sa_mask);
ASSERT_EQ(0, sigaction(SIGUSR2, &sa, nullptr));
auto handle = loop.RegisterSignal(SIGUSR1, make_callback(), error);
ASSERT_TRUE(error.Success());
std::thread killer([]() {
sleep(1);
kill(getpid(), SIGUSR2);
sleep(1);
kill(getpid(), SIGUSR1);
});
ASSERT_TRUE(loop.Run().Success());
killer.join();
ASSERT_EQ(1u, callback_count);
}
// Test that two callbacks can be registered for the same signal
// and unregistered independently.
TEST_F(MainLoopTest, TwoSignalCallbacks) {
MainLoop loop;
Status error;
unsigned callback2_count = 0;
unsigned callback3_count = 0;
auto handle = loop.RegisterSignal(SIGUSR1, make_callback(), error);
ASSERT_TRUE(error.Success());
{
// Run a single iteration with two callbacks enabled.
auto handle2 = loop.RegisterSignal(
SIGUSR1, [&](MainLoopBase &loop) { ++callback2_count; }, error);
ASSERT_TRUE(error.Success());
kill(getpid(), SIGUSR1);
ASSERT_TRUE(loop.Run().Success());
ASSERT_EQ(1u, callback_count);
ASSERT_EQ(1u, callback2_count);
ASSERT_EQ(0u, callback3_count);
}
{
// Make sure that remove + add new works.
auto handle3 = loop.RegisterSignal(
SIGUSR1, [&](MainLoopBase &loop) { ++callback3_count; }, error);
ASSERT_TRUE(error.Success());
kill(getpid(), SIGUSR1);
ASSERT_TRUE(loop.Run().Success());
ASSERT_EQ(2u, callback_count);
ASSERT_EQ(1u, callback2_count);
ASSERT_EQ(1u, callback3_count);
}
// Both extra callbacks should be unregistered now.
kill(getpid(), SIGUSR1);
ASSERT_TRUE(loop.Run().Success());
ASSERT_EQ(3u, callback_count);
ASSERT_EQ(1u, callback2_count);
ASSERT_EQ(1u, callback3_count);
}
#endif
|
