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
|
package internal
import (
"context"
"ior/internal/event"
"ior/internal/types"
"syscall"
"testing"
)
const (
defaulTime = 1234567
defaultPid = 10
defaultTid = 11
)
type testData struct {
// All the raw tracepoints sent to the event loop
rawTracepoints [][]byte
// Validation functions to be called on the event loop output
validates []func(t *testing.T, el *eventLoop, ev *event.Pair)
}
func TestEventloop(t *testing.T) {
testTable := map[string]testData{
"OpenEventTest1": makeOpenEventTestData1(t),
"OpenEventTest2": makeOpenEventTestData2(t),
"OpenEventTest3": makeOpenEventTestData3(t),
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
inCh := make(chan []byte)
outCh := make(chan *event.Pair)
el := newEventLoop()
el.printCb = func(ev *event.Pair) { outCh <- ev }
go el.run(ctx, inCh)
for testName, td := range testTable {
t.Run(testName, func(t *testing.T) {
go func() {
for _, raw := range td.rawTracepoints {
t.Log("Sending raw tracepoint", raw, "simulating BPF sending this")
inCh <- raw
}
}()
for _, validate := range td.validates {
ep := <-outCh
t.Log("Received", ep)
validate(t, el, ep)
}
select {
case x := <-outCh:
t.Errorf("Expected no more events but got '%v'", x)
default:
}
})
}
}
// Tests a simple enter/exit pair of tracepoints.
func makeOpenEventTestData1(t *testing.T) (td testData) {
enterEv, enterEvBytes := makeEnterOpenEvent(t, defaulTime, defaultPid, defaultTid)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes)
exitEv, exitEvBytes := makeExitOpenEvent(t, defaulTime, defaultPid, defaultTid)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv, ep.EnterEv)
}
if !exitEv.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv, ep.ExitEv)
}
filenameA := ep.FileName()
filenameB := types.StringValue(enterEv.Filename[:])
if filenameA != filenameB {
t.Errorf("Expected file name '%v' but got '%v'", filenameB, filenameA)
}
comm := types.StringValue(enterEv.Comm[:])
if ep.Comm != comm {
t.Errorf("Expected comm name '%v' but got '%v'", comm, ep.Comm)
}
})
return td
}
// Tests skipping of incomplete enter/exit tracepoints.
func makeOpenEventTestData2(t *testing.T) (td testData) {
// Almost the same, but with duplicates
td1 := makeOpenEventTestData1(t)
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be ignored by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[0]) // Will be used by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[0]) // Will be ignored by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be used by the event loop
td.rawTracepoints = append(td.rawTracepoints, td1.rawTracepoints[1]) // Will be ignored by the event loop
td.validates = td1.validates
return td
}
// Tests 2 parallel tracepoints but from different threads.
func makeOpenEventTestData3(t *testing.T) (td testData) {
enterEv1, enterEvBytes1 := makeEnterOpenEvent(t, defaulTime, defaultPid, defaultTid)
enterEv2, enterEvBytes2 := makeEnterOpenEvent(t, defaulTime+1, defaultPid, defaultTid+1)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes1)
td.rawTracepoints = append(td.rawTracepoints, enterEvBytes2)
exitEv1, exitEvBytes1 := makeExitOpenEvent(t, defaulTime+2, defaultPid, defaultTid)
exitEv2, exitEvBytes2 := makeExitOpenEvent(t, defaulTime+3, defaultPid, defaultTid+1)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes1)
td.rawTracepoints = append(td.rawTracepoints, exitEvBytes2)
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv1.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv1, ep.EnterEv)
}
if !exitEv1.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv1, ep.ExitEv)
}
})
td.validates = append(td.validates, func(t *testing.T, el *eventLoop, ep *event.Pair) {
if !enterEv2.Equals(ep.EnterEv) {
t.Errorf("Expected '%v' but got '%v'", enterEv2, ep.EnterEv)
}
if !exitEv2.Equals(ep.ExitEv) {
t.Errorf("Expected '%v' but got '%v'", exitEv2, ep.ExitEv)
}
})
return td
}
func makeEnterOpenEvent(t *testing.T, time uint64, pid, tid uint32) (types.OpenEvent, []byte) {
ev := types.OpenEvent{
EventType: types.ENTER_OPEN_EVENT,
TraceId: types.SYS_ENTER_OPENAT,
Time: time,
Pid: pid,
Tid: tid,
Flags: syscall.O_RDWR,
Filename: [types.MAX_FILENAME_LENGTH]byte{},
Comm: [types.MAX_PROGNAME_LENGTH]byte{},
}
copy(ev.Filename[:], "testfile.txt")
copy(ev.Comm[:], "testcomm")
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
func makeExitOpenEvent(t *testing.T, time uint64, pid, tid uint32) (types.RetEvent, []byte) {
ev := types.RetEvent{
EventType: types.EXIT_OPEN_EVENT,
TraceId: types.SYS_EXIT_OPENAT,
Time: time,
Ret: 42,
Pid: pid,
Tid: tid,
}
bytes, err := ev.Bytes()
if err != nil {
t.Error(err)
}
return ev, bytes
}
|
