Corruption of strings

[earthboundkid]

I'm seeing an issue where a Go string is sometimes corrupted when passed to darwinkit. Is there some magic thing I should do first to ensure the string isn't overwritten? I don't understand how they are supposed to interact. I tried just doing a defense strings.Clone, but somehow it didn't help and I still got corrupted memory.

[earthboundkid]

This is the code snippet:

func buildName(path string) (string, error) {
	ppath := strings.Clone(path)
	// fmt.Println("*", path, ppath) // ← if I uncomment this, I don't get corruption!!
	dateAdded, err := getDateAdded(ppath)
	fmt.Println("*", path, ppath)
	if err != nil {
		return "", err
	}
	kind := getKind(path)
	name := filepath.Base(path)
	return fmt.Sprintf("%d/%02d/%s/%s", dateAdded.Year(), dateAdded.Month(), kind, name), nil
}

func getDateAdded(path string) (time.Time, error) {
	var dateAdded foundation.Date
	defer dateAdded.Release()
	var err foundation.Error
	defer err.Release()

	s := strings.Clone(path) // Apparently, Foundation breaks strings sometimes!!
	url := foundation.URL_FileURLWithPath(s)
	defer url.Release()
	if ok := url.GetResourceValueForKeyError(
		unsafe.Pointer(&dateAdded),
		foundation.URLAddedToDirectoryDateKey,
		unsafe.Pointer(&err),
	); !ok {
		return time.Time{}, fmt.Errorf("could not read %q", path)
	}

	unixTimestamp := dateAdded.TimeIntervalSince1970()
	seconds := math.Floor(float64(unixTimestamp))
	nanoseconds := (float64(unixTimestamp) - seconds) * 1e9

	return time.Unix(int64(seconds), int64(nanoseconds)), nil
}

[programmingkidx]

Maybe @programmingkidx has?

Sorry I haven't seen this issue.

[torarnv]

I'm seeing a very similar issue, where data structures in my app are corrupted as a result of calling APIs via darwinkit. I have a list of objects, each with a rune, now and then one of the runes become null/\0. If I remove/disable the calls via darwinkit, the problem seemingly goes away. The APIs I'm calling are not passed my data structure. Very strange.

[torarnv]

And I do have an objc.WithAutoreleasePool around my code

[earthboundkid]

I also saw nulls pop up on a seemingly random other object. Something must be "intelligently" inserting nulls into strings to convert them from length plus pointer to null terminated and end up just spraying the nulls randomly. :-/

[progrium]

Share any specific examples to reproduce. I haven't run into this yet but hopefully somebody will have the time to investigate.