package main

import (
        "fmt"
        "os/exec"
        "runtime"
        "syscall"

        "golang.org/x/sys/unix"
)

func main() {
        runtime.LockOSThread()

        cmd := exec.Command("/bin/true")
        cmd.SysProcAttr = &syscall.SysProcAttr{ Ptrace: true }
        err := cmd.Start()
        if err != nil {
                return
        }

        var status unix.WaitStatus
        _, err = unix.Wait4(cmd.Process.Pid, &status, 0, nil)
        if err != nil {
                return
        }

        var regs unix.PtraceRegs
        err = unix.PtraceGetRegs(cmd.Process.Pid, &regs)
        if err != nil {
                return
        }

        fmt.Printf("%#016x\n", regs.PC())
}