[Octave-bug-tracker] [bug #64708] mxFree causes crash inside OMP parallel block

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?64708>

                 Summary: mxFree causes crash inside OMP parallel block
                   Group: GNU Octave
               Submitter: None
               Submitted: Fri 22 Sep 2023 06:31:39 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 8.3.0
         Discussion Lock: Any
        Operating System: GNU/Linux
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Fri 22 Sep 2023 06:31:39 PM UTC By: Anonymous
mxMalloc/mxFree cause a crash when used inside an OMP parallel block.
Replacing them with malloc/free works so it must be something to do with
_mex_context_, which I'm afraid goes above my pay grade to comprehend.

mxFree (void *ptr)
{

  if (mex_context)

    mex_context->free (ptr);

  else

    xfree (ptr);

}



I'm attaching a short demo code (TestFunc.cpp) and the output from compiling
and running it in Octave.


octave:1> mex TestFunc.cpp -fopenmp
octave:2> TestFunc(1)
1
octave:3> TestFunc(0)
fatal: caught signal fatal: caught signal fatal: caught signal fatal: caught
signal fatal: caught signal fatal: caught signal fatal: caught signal fatal:
caught signal Segmentation faultSegmentation fault -- stopping
myself...Segmentation fault -- stopping myself...
Segmentation faultfatal: caught signal Segmentation faultSegmentation fault --
stopping myself...

 -- stopping myself...
Segmentation fault (core dumped)








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File Attachments:


-------------------------------------------------------
Date: Fri 22 Sep 2023 06:31:39 PM UTC  Name: TestFunc.cpp  Size: 550B   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=55157>

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