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
|
package main
import (
"fmt"
"path/filepath"
"syscall"
"time"
)
const familyMixedEmitFor = 3 * time.Second
// familyMixed emits representative syscalls from multiple broad families so
// integration tests can verify family tagging and aggregation from a real trace.
func familyMixed() error {
deadline := time.Now().Add(familyMixedEmitFor)
for {
if err := familyMixedOnce(); err != nil {
return err
}
if time.Now().After(deadline) {
return nil
}
time.Sleep(25 * time.Millisecond)
}
}
func familyMixedOnce() error {
if err := familyMixedFS(); err != nil {
return err
}
if err := familyMixedMemory(); err != nil {
return err
}
if err := familyMixedIPC(); err != nil {
return err
}
if err := familyMixedNetwork(); err != nil {
return err
}
return familyMixedProcessSchedTime()
}
func familyMixedFS() error {
dir, cleanup, err := makeTempDir("family-mixed")
if err != nil {
return err
}
defer cleanup()
path := filepath.Join(dir, "family-file.txt")
fd, err := syscall.Open(path, syscall.O_RDWR|syscall.O_CREAT|syscall.O_TRUNC, 0o644)
if err != nil {
return fmt.Errorf("open family file: %w", err)
}
defer syscall.Close(fd)
if _, err := syscall.Write(fd, []byte("family")); err != nil {
return fmt.Errorf("write family file: %w", err)
}
return nil
}
func familyMixedMemory() error {
mapped, err := syscall.Mmap(-1, 0, 4096, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_PRIVATE|syscall.MAP_ANON)
if err != nil {
return fmt.Errorf("mmap anonymous page: %w", err)
}
defer syscall.Munmap(mapped)
mapped[0] = 1
return nil
}
func familyMixedIPC() error {
var pipe [2]int
if err := syscall.Pipe2(pipe[:], syscall.O_CLOEXEC); err != nil {
return fmt.Errorf("pipe2: %w", err)
}
defer syscall.Close(pipe[0])
defer syscall.Close(pipe[1])
return nil
}
func familyMixedNetwork() error {
fds, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_STREAM|syscall.SOCK_CLOEXEC, 0)
if err != nil {
return fmt.Errorf("socketpair: %w", err)
}
defer syscall.Close(fds[0])
defer syscall.Close(fds[1])
return nil
}
func familyMixedProcessSchedTime() error {
if _, _, errno := syscall.RawSyscall(syscall.SYS_GETPID, 0, 0, 0); errno != 0 {
return fmt.Errorf("getpid: %w", errno)
}
if _, _, errno := syscall.RawSyscall(syscall.SYS_SCHED_YIELD, 0, 0, 0); errno != 0 {
return fmt.Errorf("sched_yield: %w", errno)
}
if err := syscall.Nanosleep(&syscall.Timespec{Nsec: 1000}, nil); err != nil && err != syscall.EINTR {
return fmt.Errorf("nanosleep: %w", err)
}
return nil
}
|
