SIGSEGV on Android about frostwire-jlibtorrent

[sv244]

Ok, solved. I needed to update my AlertListener. Now the part where TorrentInfo is null.

[sv244]

That didn't seem to be the whole problem. I'm still getting the error, but I updated all my code.

08-07 15:22:23.845 2398-2567/pct.droid.dev A/libc﹕ Fatal signal 11 (SIGSEGV), code 1, fault addr 0xcaae3e20 in tid 2567 (Session-alertsL)

And I have no idea what I should search for. I don't even know if this isn't a problem in libtorrent itself.

[aldenml]

Can you paste a longer log output? I need to see more about the stack trace.

[sv244]

08-07 16:09:16.843  22307-22307/pct.droid.dev A/libc﹕ Fatal signal 11 (SIGSEGV), code 1, fault addr 0xcaae3e20 in tid 22307 (pct.droid.dev)
08-07 16:09:19.403  22307-22307/pct.droid.dev W/pct.droid.dev﹕ type=1701 audit(0.0:172): auid=4294967295 uid=10243 gid=10243 ses=4294967295 subj=u:r:untrusted_app:s0 reason="memory violation" sig=11

This is all I get. (Didn't notice the second line before)

[aldenml]

With version of jlibtorrent are you working with?

[sv244]

1.1.0.2

[aldenml]

Yesterday I found another null pointer error in libtorrent, it's already merged (arvidn/libtorrent#72). In a few hours I will release another version, maybe this fix your issue. If not, I will need more info from you. Let's see.

[sv244]

Hopefully! Thanks.

[aldenml]

@sv244 I released version 1.1.0.3, let me know if you are still getting the error.

[sv244]

I'll try 👍

[gubatron]

sweet

[sv244]

That I'm going to try it doesn't mean it is solved.

[gubatron]

gotcha

[sv244]

Nope.

08-07 21:31:16.342 21220-21246/pct.droid.torrentstreamer.sample A/libc﹕ Fatal signal 11 (SIGSEGV), code 1, fault addr 0x5e76f142 in tid 21246 (Session-alertsL)

[gubatron]

dang

[sv244]

I'll push my code to a repo. Maybe I'm doing something completely wrong.

Although, it worked ok with previous versions.

[gubatron]

👍

[sv244]

https://github.com/sv244/TorrentStream-Android

[gubatron]

link(s) to file(s)?

[sv244]

Anything within https://github.com/sv244/TorrentStream-Android/tree/develop/library/src/main/java/pct/droid/torrentstream

TorrentStream.java to be more specific.

[aldenml]

Ok, no promise on timing, I will take a close look.

[sv244]

No worries. That you will is good enough for me.

[sv244]

I also noticed that TorrentInfo is null most of the times. Might be related?

https://github.com/sv244/TorrentStream-Android/blob/develop/library/src/main/java/pct/droid/torrentstream/Torrent.java#L137
https://github.com/sv244/TorrentStream-Android/blob/develop/library/src/main/java/pct/droid/torrentstream/Torrent.java#L239

[aldenml]

Ok @sv244 , in this line https://github.com/sv244/TorrentStream-Android/blob/develop/library/src/main/java/pct/droid/torrentstream/TorrentStream.java#L372

you are getting a reference to a torrent handle from an alert. This references are short lived inside libtorrent, then the "Fatal signal 11". Use the following instead:

TorrentHandle th = mTorrentSession.findTorrent(((TorrentAddedAlert) alert).getHandle().getInfoHash());
mCurrentTorrent = new Torrent(th, listener);

Now, when do you not get the NPE (I will write about it after this), you will get to the point of:

08-07 22:29:12.121    9544-9544/pct.droid.torrentstreamer.sample D/Torrent﹕ onStreamProgress: 1
08-07 22:29:12.121    9544-9544/pct.droid.torrentstreamer.sample D/Torrent﹕ onStreamProgress: 1
08-07 22:29:12.121    9544-9544/pct.droid.torrentstreamer.sample D/Torrent﹕ onStreamProgress: 2

Now, about the NPE. The problem is that you are downloading a magnet, at the very beginning, the torrent info is null, since the metadata is not available. Check the class MetadataReceivedAlert.

Let us know.

[sv244]

You're a hero! It completely works now.