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main.go
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main.go
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package main
import (
"bytes"
_ "embed"
"fmt"
"github.com/cilium/ebpf"
"github.com/sirupsen/logrus"
manager "github.com/DataDog/ebpf-manager"
)
//go:embed ebpf/bin/probe.o
var Probe []byte
type TestData struct {
Input uint32
Output uint32
}
func (td TestData) String() string {
return fmt.Sprintf("{ Input:%v Output:%v }", td.Input, td.Output)
}
var testDataKey = uint32(1)
var testData = []TestData{
{2, 4},
{10, 20},
{42, 128},
{42, 84},
}
func main() {
// Initialize the manager
var m = &manager.Manager{}
if err := m.Init(bytes.NewReader(Probe)); err != nil {
logrus.Fatal(err)
}
// Get map used to send tests
testMap, found, err := m.GetMap("my_func_test_data")
if !found || err != nil {
logrus.Fatalf("couldn't retrieve my_func_test_data %v", err)
}
// Get xdp program used to trigger the tests
testProgs, found, err := m.GetProgram(
manager.ProbeIdentificationPair{
EBPFFuncName: "my_func_test",
},
)
if !found || err != nil {
logrus.Fatalf("couldn't retrieve my_func_test %v", err)
}
testProg := testProgs[0]
// Run test
runtTest(testMap, testProg)
// Run benchmark
runtBenchmark(testMap, testProg)
}
func runtTest(testMap *ebpf.Map, testProg *ebpf.Program) {
logrus.Println("Running tests ...")
for _, data := range testData {
// insert data
if err := testMap.Put(testDataKey, data); err != nil {
logrus.Fatal(err)
}
// Trigger test - (the 14 bytes is for the minimum packet size required to test an XDP program)
outLen, _, err := testProg.Test(make([]byte, 14))
if err != nil {
logrus.Fatal(err)
}
if data.Input == 42 && data.Output == 128 {
logrus.Printf("(failure expected on next test)")
}
if outLen == 0 {
logrus.Printf("%v - PASS", data)
} else {
logrus.Printf("%v - FAIL (checkout /sys/kernel/debug/tracing/trace_pipe to see the logs)", data)
}
}
}
func runtBenchmark(testMap *ebpf.Map, testProg *ebpf.Program) {
logrus.Println("Running benchmark ...")
for _, data := range testData {
// insert data
if err := testMap.Put(testDataKey, data); err != nil {
logrus.Fatal(err)
}
// Trigger test
outLen, duration, err := testProg.Benchmark(make([]byte, 14), 1000, nil)
if err != nil {
logrus.Fatal(err)
}
if data.Input == 42 && data.Output == 128 {
logrus.Printf("(failure expected on next benchmark)")
}
if outLen == 0 {
logrus.Printf("%v - PASS (duration: %v)", data, duration)
} else {
logrus.Printf("%v - benchmark FAILED (checkout /sys/kernel/debug/tracing/trace_pipe to see the logs)", data)
}
}
}