forked from aquasecurity/libbpfgo
/
main.go
78 lines (68 loc) · 1.35 KB
/
main.go
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package main
import "C"
import (
"encoding/binary"
"os"
"syscall"
"time"
"fmt"
bpf "github.com/aquasecurity/libbpfgo"
)
func main() {
bpfModule, err := bpf.NewModuleFromFile("main.bpf.o")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
defer bpfModule.Close()
prog, err := bpfModule.GetProgram("foobar")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
prog.SetProgramType(bpf.BPFProgTypeTracing)
prog.SetAttachType(bpf.BPFAttachTypeTraceFentry)
err = prog.SetAttachTarget(0, "__x64_sys_mmap")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
err = bpfModule.BPFLoadObject()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
_, err = prog.AttachGeneric()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
eventsChannel := make(chan []byte)
rb, err := bpfModule.InitRingBuf("events", eventsChannel)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(-1)
}
rb.Start()
numberOfEventsReceived := 0
go func() {
for {
syscall.Mmap(999, 999, 999, 1, 1)
time.Sleep(time.Second / 100)
}
}()
recvLoop:
for {
b := <-eventsChannel
if binary.LittleEndian.Uint32(b) != 2021 {
fmt.Fprintf(os.Stderr, "invalid data retrieved\n")
os.Exit(-1)
}
numberOfEventsReceived++
if numberOfEventsReceived > 5 {
break recvLoop
}
}
rb.Stop()
rb.Close()
}