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@grantseltzer

grantseltzer/test.go

Last active May 11, 2020
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package main
//go:noinline
func simpleFunction(x int) {
// some code
}
func main() {
simpleFunction(99)
}
package main
import (
"fmt"
"log"
"os"
"os/signal"
"github.com/iovisor/gobpf/bcc"
)
const eBPF_Program = `
inline int get_arguments(struct pt_regs *ctx) {
void* stackAddr = (void*)ctx->sp;
long parameter_value;
bpf_probe_read(&parameter_value, sizeof(parameter_value), stackAddr+8);
events.perf_submit(ctx, &parameter_value, sizeof(parameter_value));
}
`
func main() {
bpfModule := bcc.NewModule(eBPF_Program, []string{})
uprobeFd, err := bpfModule.LoadUprobe("get_arguments")
if err != nil {
log.Fatal(err)
}
err = bpfModule.AttachUprobe(os.Args[1], "main.test", uprobeFd, -1)
if err != nil {
log.Fatal(err)
}
table := bcc.NewTable(bpfModule.TableId("events"), bpfModule)
channel := make(chan []byte)
perfMap, err := bcc.InitPerfMap(table, channel)
if err != nil {
log.Fatal(err)
}
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func() {
for {
value := <-channel
fmt.Println(string(value))
}
}()
perfMap.Start()
<-c
perfMap.Stop()
}
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