blob: 2d20f7ef3ae6b426efc5fec7ad1ee5b3be159103 (
plain)
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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
// Copyright 2020 The gVisor Authors.
//
// 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.
package tcpip_test
import (
"sync"
"testing"
"time"
"gvisor.dev/gvisor/pkg/tcpip"
)
const (
shortDuration = 1 * time.Nanosecond
middleDuration = 100 * time.Millisecond
longDuration = 1 * time.Second
)
func TestCancellableTimerFire(t *testing.T) {
t.Parallel()
ch := make(chan struct{})
var lock sync.Mutex
timer := tcpip.MakeCancellableTimer(&lock, func() {
ch <- struct{}{}
})
timer.Reset(shortDuration)
// Wait for timer to fire.
select {
case <-ch:
case <-time.After(middleDuration):
t.Fatal("timed out waiting for timer to fire")
}
// The timer should have fired only once.
select {
case <-ch:
t.Fatal("no other timers should have fired")
case <-time.After(middleDuration):
}
}
func TestCancellableTimerResetFromLongDuration(t *testing.T) {
t.Parallel()
ch := make(chan struct{})
var lock sync.Mutex
timer := tcpip.MakeCancellableTimer(&lock, func() { ch <- struct{}{} })
timer.Reset(middleDuration)
lock.Lock()
timer.StopLocked()
lock.Unlock()
timer.Reset(shortDuration)
// Wait for timer to fire.
select {
case <-ch:
case <-time.After(middleDuration):
t.Fatal("timed out waiting for timer to fire")
}
// The timer should have fired only once.
select {
case <-ch:
t.Fatal("no other timers should have fired")
case <-time.After(middleDuration):
}
}
func TestCancellableTimerResetFromShortDuration(t *testing.T) {
t.Parallel()
ch := make(chan struct{})
var lock sync.Mutex
lock.Lock()
timer := tcpip.MakeCancellableTimer(&lock, func() { ch <- struct{}{} })
timer.Reset(shortDuration)
timer.StopLocked()
lock.Unlock()
// Wait for timer to fire if it wasn't correctly stopped.
select {
case <-ch:
t.Fatal("timer fired after being stopped")
case <-time.After(middleDuration):
}
timer.Reset(shortDuration)
// Wait for timer to fire.
select {
case <-ch:
case <-time.After(middleDuration):
t.Fatal("timed out waiting for timer to fire")
}
// The timer should have fired only once.
select {
case <-ch:
t.Fatal("no other timers should have fired")
case <-time.After(middleDuration):
}
}
func TestCancellableTimerImmediatelyStop(t *testing.T) {
t.Parallel()
ch := make(chan struct{})
var lock sync.Mutex
for i := 0; i < 1000; i++ {
lock.Lock()
timer := tcpip.MakeCancellableTimer(&lock, func() { ch <- struct{}{} })
timer.Reset(shortDuration)
timer.StopLocked()
lock.Unlock()
}
// Wait for timer to fire if it wasn't correctly stopped.
select {
case <-ch:
t.Fatal("timer fired after being stopped")
case <-time.After(middleDuration):
}
}
func TestCancellableTimerStoppedResetWithoutLock(t *testing.T) {
t.Parallel()
ch := make(chan struct{})
var lock sync.Mutex
lock.Lock()
timer := tcpip.MakeCancellableTimer(&lock, func() { ch <- struct{}{} })
timer.Reset(shortDuration)
timer.StopLocked()
lock.Unlock()
for i := 0; i < 10; i++ {
timer.Reset(middleDuration)
lock.Lock()
// Sleep until the timer fires and gets blocked trying to take the lock.
time.Sleep(middleDuration * 2)
timer.StopLocked()
lock.Unlock()
}
// Wait for double the duration so timers that weren't correctly stopped can
// fire.
select {
case <-ch:
t.Fatal("timer fired after being stopped")
case <-time.After(middleDuration * 2):
}
}
func TestManyCancellableTimerResetAfterBlockedOnLock(t *testing.T) {
t.Parallel()
ch := make(chan struct{})
var lock sync.Mutex
lock.Lock()
timer := tcpip.MakeCancellableTimer(&lock, func() { ch <- struct{}{} })
timer.Reset(shortDuration)
for i := 0; i < 10; i++ {
// Sleep until the timer fires and gets blocked trying to take the lock.
time.Sleep(middleDuration)
timer.StopLocked()
timer.Reset(shortDuration)
}
lock.Unlock()
// Wait for double the duration for the last timer to fire.
select {
case <-ch:
case <-time.After(middleDuration):
t.Fatal("timed out waiting for timer to fire")
}
// The timer should have fired only once.
select {
case <-ch:
t.Fatal("no other timers should have fired")
case <-time.After(middleDuration):
}
}
func TestManyCancellableTimerResetUnderLock(t *testing.T) {
t.Parallel()
ch := make(chan struct{})
var lock sync.Mutex
lock.Lock()
timer := tcpip.MakeCancellableTimer(&lock, func() { ch <- struct{}{} })
timer.Reset(shortDuration)
for i := 0; i < 10; i++ {
timer.StopLocked()
timer.Reset(shortDuration)
}
lock.Unlock()
// Wait for double the duration for the last timer to fire.
select {
case <-ch:
case <-time.After(middleDuration):
t.Fatal("timed out waiting for timer to fire")
}
// The timer should have fired only once.
select {
case <-ch:
t.Fatal("no other timers should have fired")
case <-time.After(middleDuration):
}
}
|
