2015-11-07 7:23 GMT-03:00 David Faure <fa...@kde.org>: > On Saturday 07 November 2015 10:36:18 David Faure wrote: >> On Saturday 07 November 2015 11:17:31 Ben Cooksley wrote: >> > Hi all, >> > >> > It appears the test running with the binary name of "threadtest" in >> > kio has a grave bug which can lead to it entering into an infinite >> > loop. >> > >> > This was consuming virtually the entire resources of one builder with >> > old hung processes, and the whole core of another builder - >> > drastically limiting the capabilities of the CI system (even though >> > KIO was not being built at the time). >> > >> > Can someone please investigate? Manual intervention (with kill -9) is >> > needed to remove these hung processes. >> >> It of course works fine on my own machine. >> >> And I just tried running it on LinuxNode2, in >> ~/builds/kio/stable-kf5-qt5/build/autotests >> (after sourcing ~/kio.env which I just generated), and it ran fine (multiple >> times). >> >> Any suggestion on how / where to hit the issue? > > OK, it happens in kf5-qt5 rather than in stable-kf5-qt5 > > One of the KIO-using threads seems stuck in QProcess.... smells like a Qt bug? > Or is there a reason why starting a new process or creating a new pipe would > sometimes fail (some ulimit?) > > Context: this test starts 20 threads at once, each of which starts a QProcess > (using startDetached) (for the kioslave binary). It works most of the time, > but sometimes > hangs with the bt below. > > (gdb) bt > #0 0x00007ffff4bdd49d in read () from /lib/x86_64-linux-gnu/libc.so.6 > #1 0x00007ffff6f27637 in read () from /usr/lib/x86_64-linux-gnu/libasan.so.1 > #2 0x00007ffff565a2ed in qt_safe_read (fd=43, data=0x7fffddf14cc0, maxlen=1) > at > ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/kernel/qcore_unix_p.h:265
Could it be an asan bug? Have you tried compiling this without address sanitizer? -- Nicolás _______________________________________________ Kde-frameworks-devel mailing list Kde-frameworks-devel@kde.org https://mail.kde.org/mailman/listinfo/kde-frameworks-devel