[gstreamer-bugs] [Bug 608901] [gnomevfssrc] Problem using gnomevfssrc with ssh uri

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=608901
  GStreamer | gst-plugins-base | 0.10.25

--- Comment #1 from tiagokatcipis at gmail.com 2010-02-03 19:43:07 UTC ---
Created an attachment (id=152959)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=152959)
pure gnomevfs crash test

i did some debugging (with some help at work) and we find out that the problem
is at the
method "gst_gnome_vfs_src_get_size". The method uses some info facilities of
gnomevfs.

We started to test gnomevfs alone and we where able to determine that when you
just open and
read the same ssh uri multiple times on multiple threads, it works fine. But if
you try to read and access the
info of the same ssh uri from multiple threads, it crashes. The main difference
is that sometimes it crashes like
gstreamer and sometimes a deadlock happens (if you start something like 30
worker threads it always give a
GLib-ERROR **: /build/buildd/glib2.0-2.22.3/glib/gmem.c:175: failed to allocate
[lot of] bytes),
and a lot of protocol errors and i/o errors gets printed.

It looks that gnomevfs has a problem with thread safety when you require info
about the same ssh uri from multiple threads (other protocols looks to work
fine).

Source code without info that works fine:
https://svn.inf.ufsc.br/katcipis/c/gnomevfs_bug/ok_test.c

Source code with info that crashes:
https://svn.inf.ufsc.br/katcipis/c/gnomevfs_bug/crash_test.c

Source code with info and with mutex that works fine:
https://svn.inf.ufsc.br/katcipis/c/gnomevfs_bug/ok_mutex_test.c

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