print_stack.go

var (
	re = regexp.MustCompile(`^(\S.+)\.(\S.+)$`)
)

type CallerInfo struct {
	PackageName  string
	FunctionName string
	FileName     string
	FileLine     int
}

func Dump() (callerInfo []*CallerInfo) {
	for i := 1; ; i++ {
		pc, _, _, ok := runtime.Caller(i) // https://golang.org/pkg/runtime/#Caller
		if !ok {
			break
		}

		fn := runtime.FuncForPC(pc)
		fileName, fileLine := fn.FileLine(pc)

		_fn := re.FindStringSubmatch(fn.Name())
		callerInfo = append(callerInfo, &CallerInfo{
			PackageName:  _fn[1],
			FunctionName: _fn[2],
			FileName:     fileName,
			FileLine:     fileLine,
		})
	}
	for i := len(callerInfo) - 1; i > -1; i-- {
		v := callerInfo[i]
		fmt.Printf("%02d: %s.%s@%s:%d\n", i, v.PackageName, v.FunctionName, v.FileName, v.FileLine)
	}
	return
}