Golang stacktrace

staccktrace.go

func getStackTrace() string {
	// Method stack trace
	pc := make([]uintptr, 10)   // Last traces
	n := runtime.Callers(2, pc) // Discard first (callers) and second (this function) values

	if n == 0 {
		return ""
	}

	pc = pc[:n] // Apply some magic

	frames := runtime.CallersFrames(pc) // Get all callers

	var calls []runtime.Frame

	// Iterate over calls
	for {
		frame, more := frames.Next() // Get next call
		if !more {
			break
		}
		calls = append(calls, frame) // Save the call
	}

	var b strings.Builder

	// Build string
	for i := len(calls) - 2; i > 0; i-- {
		b.WriteString(fmt.Sprintf("%v > ", calls[i].Function))
	}
	b.WriteString(fmt.Sprintf("%v ", calls[0].Function))
	b.WriteString(fmt.Sprintf("in %s at line %d.\n", calls[0].File, calls[0].Line))

	// Write string in log
	return b.String()
}