Kill frozen dlv --headless on macOS

main.go

package main

import (
	"fmt"
	"github.com/mitchellh/go-ps"
	"os"
	"os/signal"
	"syscall"
	"time"
)

func main() {
	defer deferredKillDlv()()

	fmt.Println("exit me or wait for 5 secs...")
	time.Sleep(5 * time.Second)
}

func deferredKillDlv() func() {
	pid := getDlvPid()
	if pid == 0 {
		return func() {}
	}
	kill := func() {
		p := recover()
		if p != nil {
			fmt.Printf("panic recovered: %v\n", p)
		}
		_ = syscall.Kill(pid, syscall.SIGINT)
	}
	s := make(chan os.Signal, 1)
	signal.Notify(s, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
	go func() {
		<-s
		kill()
	}()
	return kill
}

func getDlvPid() int {
	dlvPid := 0
	for pid := os.Getpid(); pid > 0; {
		p, _ := ps.FindProcess(pid)
		if p.Executable() == "dlv" {
			dlvPid = pid
			break
		}
		if pid == p.PPid() {
			break
		}
		pid = p.PPid()
	}
	return dlvPid
}