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
|
package internal
import (
"errors"
"strings"
"testing"
)
type fakeTracepointProgram struct {
attachCalls int
attachErr error
}
type fakeTracepointLink struct{}
func (fakeTracepointLink) Destroy() error { return nil }
func (p *fakeTracepointProgram) attachTracepoint(_, _ string) (tracepointLink, error) {
p.attachCalls++
if p.attachErr != nil {
return nil, p.attachErr
}
return fakeTracepointLink{}, nil
}
type fakeTracepointModule struct {
getProgramCalls []string
getProgramErrs map[string]error
programs map[string]*fakeTracepointProgram
}
func (m *fakeTracepointModule) getProgram(progName string) (tracepointProgram, error) {
m.getProgramCalls = append(m.getProgramCalls, progName)
if err, ok := m.getProgramErrs[progName]; ok {
return nil, err
}
if prog, ok := m.programs[progName]; ok {
return prog, nil
}
return nil, errors.New("missing program")
}
func TestAttachTracepointsWithSkipsFilteredTracepoints(t *testing.T) {
module := &fakeTracepointModule{
programs: map[string]*fakeTracepointProgram{
"handle_sys_enter_read": {},
"handle_sys_enter_write": {},
},
getProgramErrs: map[string]error{},
}
err := attachTracepointsWith(module, func(tracepoint string) bool {
return tracepoint == "sys_enter_read"
}, []string{"sys_enter_read", "sys_enter_write"}, false)
if err != nil {
t.Fatalf("attachTracepointsWith returned error: %v", err)
}
if len(module.getProgramCalls) != 1 || module.getProgramCalls[0] != "handle_sys_enter_read" {
t.Fatalf("getProgram calls = %v, want only handle_sys_enter_read", module.getProgramCalls)
}
if module.programs["handle_sys_enter_read"].attachCalls != 1 {
t.Fatalf("read attach calls = %d, want 1", module.programs["handle_sys_enter_read"].attachCalls)
}
if module.programs["handle_sys_enter_write"].attachCalls != 0 {
t.Fatalf("write attach calls = %d, want 0", module.programs["handle_sys_enter_write"].attachCalls)
}
}
func TestAttachTracepointsWithReturnsErrorWhenProgramMissing(t *testing.T) {
module := &fakeTracepointModule{
programs: map[string]*fakeTracepointProgram{},
getProgramErrs: map[string]error{
"handle_sys_enter_read": errors.New("not found"),
},
}
err := attachTracepointsWith(module, func(string) bool { return true }, []string{"sys_enter_read"}, false)
if err == nil {
t.Fatal("attachTracepointsWith returned nil error, want non-nil")
}
if !strings.Contains(err.Error(), "handle_sys_enter_read") {
t.Fatalf("error %q does not mention handle_sys_enter_read", err)
}
}
func TestAttachTracepointsWithAttachFailureContinues(t *testing.T) {
module := &fakeTracepointModule{
programs: map[string]*fakeTracepointProgram{
"handle_sys_enter_read": {attachErr: errors.New("no tracepoint")},
"handle_sys_enter_write": {},
},
getProgramErrs: map[string]error{},
}
err := attachTracepointsWith(module, func(string) bool { return true }, []string{"sys_enter_read", "sys_enter_write"}, false)
if err != nil {
t.Fatalf("attachTracepointsWith returned error: %v", err)
}
if module.programs["handle_sys_enter_read"].attachCalls != 1 {
t.Fatalf("read attach calls = %d, want 1", module.programs["handle_sys_enter_read"].attachCalls)
}
if module.programs["handle_sys_enter_write"].attachCalls != 1 {
t.Fatalf("write attach calls = %d, want 1", module.programs["handle_sys_enter_write"].attachCalls)
}
}
|
