Re: [Paracomp-users] Paracomp crash when compiled in release mode

[James S P. <jam...@ma...>]

Hi Shree,

	Yes it works fine. Thanks.

James

Shree Kumar wrote:
> On Fri, 2008-04-11 at 15:22 +0000, James S Perrin wrote:
>> Hi Shree,
>>
>>         Same as you gcc 4.1.2 and glibc 2.5.
>>
> 
> Good news. I've fixed this just now :-)
> 
> http://paracomp.svn.sourceforge.net/viewvc/paracomp?view=rev&revision=60
> 
> James, do let me know if it works for you.
> 
> Cheers
> -- Shree
> 
>> Shree Kumar wrote:
>>> Hi James,
>>>
>>> I ran into the same problem which you faced : crash when paracomp is
>>> compiled in release mode.
>>>
>>> My system : an x86_64 machine running Fedora Core 8(x86_64). GCC version
>>> 4.1.2
>>>
>>> Basically, any program using the library crashes, _if_ paracomp was
>>> compiled in release mode. If paracomp is compiled in debug mode
>>> "release=0" things move just fine.
>>>
>>> I investigated this a bit, and found that a dlclose() in
>>> loadCompositePlugin() (pcimpl.cpp) is causing the crash.
>>>
>>> ----------------------------------------------------------
>>>  using namespace paracomp;
>>> @@ -236,7 +242,7 @@
>>>         // if the init function returns non-zero, then it cannot be used
>>>         if(((*initFunc)())!=0)
>>>         {
>>> -               dlclose(libHandle);
>>> +             //dlclose(libHandle); // commenting this out gets rid of
>>> the crash
>>>                 return false;
>>>         }
>>> ----------------------------------------------------------
>>>
>>> Seems to be a compiler related issue, since I don't see this on our RHEL
>>> 5 based system (running GCC 3.4.6).
>>>
>>> James, do you remember what compiler version you saw the issue on ?
>>>
>>> For now, I don't have a solution. Commenting out gets rid of the
>>> problem. This will result in a small memory leak, but should be good to
>>> keep people going.
>>>
>>> Just something I thought everybody must know before we find a solution
>>> to the problem.
>>>
>>> Regards
>>> -- Shree
>>>
>>>
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>> --
>> ------------------------------------------------------------------------
>>    James S. Perrin
>>    Visualization
>>
>>    Research Computing Services
>>    The University of Manchester
>>    Kilburn Building, Oxford Road
>>    Manchester, M13 9PL
>>
>>    t: +44 (0) 161 275 6945
>>    e: jam...@ma...
>>    w: www.manchester.ac.uk/researchcomputing
>> ------------------------------------------------------------------------
>>   "The test of intellect is the refusal to belabour the obvious"
>>   - Alfred Bester
>> ------------------------------------------------------------------------
> 

-- 
------------------------------------------------------------------------
   James S. Perrin
   Visualization

   Research Computing Services
   The University of Manchester
   Kilburn Building, Oxford Road
   Manchester, M13 9PL

   t: +44 (0) 161 275 6945
   e: jam...@ma...
   w: www.manchester.ac.uk/researchcomputing
------------------------------------------------------------------------
  "The test of intellect is the refusal to belabour the obvious"
  - Alfred Bester
------------------------------------------------------------------------