[Octave-bug-tracker] [bug #57591] Segmentation faults when running the test suite (mostly with clang)

[John W. Eaton]

Update of bug #57591 (project octave):

                  Status:               Confirmed => Patch Submitted        

    _______________________________________________________

Follow-up Comment #69:

What appears to be happening is that the __gnuplot_init__.oct file (the one
that defines the gnuplot graphics toolkit) is being closed before the toolkit
is unloaded.  So when that happens, the pointer to the toolkit object is
invalid.  The same problem exists with fltk.  It doesn't happen with qt
because that is not dynamically loaded (with dlopen).  The same sequence of
events happens when Octave is compiled with GCC, but for whatever reason, it
the crash isn't happening.  So, it seems that we need to either prevent the
toolkit's .oct file from being dlclosed (I thought the mlock in the init
function would do that!) or we need to ensure that when it is dlclosed, that
it is also removed/unregistered from the toolkit list.

I'm attaching a possible change to consider.  I'm not sure is the best
solution, but it should at least avoid the crash. 

(file #49678)
    _______________________________________________________

Additional Item Attachment:

File name: shutdown-diffs.txt             Size:1 KB
    <https://file.savannah.gnu.org/file/shutdown-diffs.txt?file_id=49678>



    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?57591>

_______________________________________________
  Message sent via Savannah
  https://savannah.gnu.org/