Re: [Plplot-general] Memory leaks in several plplot functions

[<flo...@iw...>]

Dear Andrew,

thanks for the quick reply. My plplot version is 5.9.9 and I use the  
current cairo driver on Ubuntu12.10.
I tried plplot example02 with a full valgrind memory leak check. Same  
problem for the plptex function. With "just"=0.0 no problem, with  
"just" any different number the following valgrind output (as an  
example). Line 152 is the plptex function:
  plptex( 0.5, 0.5, 1.0, 0.0, 0.5, text );

==7448== 500,000 bytes in 100 blocks are definitely lost in loss  
record 795 of 795
==7448==    at 0x4C2B3F8: malloc (in  
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7448==    by 0x7195E7B: ??? (in /usr/lib/plplot5.9.9/driversd/cairo.so)
==7448==    by 0x4E4A5C8: plP_esc (in /usr/lib/libplplotd.so.11.0.0)
==7448==    by 0x4E4D53B: ??? (in /usr/lib/libplplotd.so.11.0.0)
==7448==    by 0x4E6A989: c_plmtex (in /usr/lib/libplplotd.so.11.0.0)
==7448==    by 0x4E6AF84: ??? (in /usr/lib/libplplotd.so.11.0.0)
==7448==    by 0x4E6B2C7: c_plptex (in /usr/lib/libplplotd.so.11.0.0)
==7448==    by 0x401385: draw_windows(int, int) (plot_test.cpp:152)
==7448==    by 0x4011BA: demo2() (plot_test.cpp:115)
==7448==    by 0x400EF1: main (plot_test.cpp:30)

Cheers
Flo.

Quoting Andrew Ross <and...@us...>:

>
> Dear Florian,
>
> Perhaps you can give us more details of what you are doing? These functions
> are basic plplot functions and are well tested. Our first 3 examples cover
> all of these cases. Using valgrind under Linux and the psc driver all
> three of these examples produce completely clean results with the current
> svn version. It seems unlikely therefore that is is an intrinsic problem
> with plplot. Do you see the problems with these 3 examples?
>
> To pin down your problem will require more information. In particular
> - a clearer description of your code (if you can condense it to a very
>   simple example which exhibits the problem that is immensely helpful)
> - what version of plplot you are using
> - what platform (e.g. Windows MinGW,  Linux etc)
> - what drivers you are using (some drivers with external library
>   dependencies exhibit memory leaks related to bugs in the library and
>   not to plplot itself)
> - how you are testing for memory leaks (on Linux valgrind is a very useful
>   tool)
>
> Regards
>
> Andrew
>
> On Thu, Nov 22, 2012 at 04:43:37PM +0100,   
> flo...@iw... wrote:
>> Hi,
>>
>> I get memory leaks for the following plplot functions and I couldn't
>> find anything related to that topic.
>>
>> plptex using any 'just' value != 0.0
>> plbox using option 'n'
>> plmtex
>> pllab
>>
>> It's a bigger program so the memory leaks in gigabyte size, which   
>> is not nice.
>> Any suggestions, what I'm doing wrong or is it a plplot problem?
>>
>> Thanks,
>> Flo.
>>
>>
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