Re: [ft] memory leak?

[Russell Shaw]

Martin Olbrich wrote:
> Hello,
>
> I am new to this list so my problem may be an old one.
>
> After using Freetype in my program i have a bad memory leak. So i tried 
> a sample program with just the freetype commands:
>
> #include <ft2build.h>
> #include FT_FREETYPE_H
>
> int main( int argc, char**  argv )
> {
>   FT_Library library;
>
>   FT_Face face;
>
> //breakpoint 1
>   FT_Init_FreeType(&library);
>
>   FT_New_Face(library, "somepath/arial.ttf", 0, &face);
>
>   FT_Done_Face(face);
>
>   FT_Done_FreeType( library );
> //breakpoint 2
>
>   return 0;
> }
>
> At breakpoint 2 there is about 200kb more memory in use than at 
> breakpoint 1. How can that be possible? Am I missing any commands that 
> tidy up the freetype memory? I also tried with _just_ the 
> FT_Init_FreeType and FT_Done_FreeType commands and get the same results.
>
> Some more info of my system:
> I checked the memory with the windows task manager and compiled Freetype 
> 2.2.1 with MS VS2005.
>
> Thx for any help

Maybe Windoze is reporting memory it has chosen not to release, or there was a
bug in 2.2.1? With Valgrind on freetype-cvs i get:

valgrind ./test
==8075== Memcheck, a memory error detector.
==8075== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al.
==8075== Using LibVEX rev 1575, a library for dynamic binary translation.
==8075== Copyright (C) 2004-2005, and GNU GPL'd, by OpenWorks LLP.
==8075== Using valgrind-3.1.1-Debian, a dynamic binary instrumentation 
framework.
==8075== Copyright (C) 2000-2005, and GNU GPL'd, by Julian Seward et al.
==8075==
...
==8075==
==8075== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 17 from 1)
--8075--
--8075-- supp:   17 Debian libc6 stripped dynamic linker
==8075== malloc/free: in use at exit: 0 bytes in 0 blocks.
==8075== malloc/free: 72 allocs, 72 frees, 48,027 bytes allocated.
==8075==
==8075== All heap blocks were freed -- no leaks are possible.
--8075--  memcheck: sanity checks: 2 cheap, 1 expensive
--8075--  memcheck: auxmaps: 0 auxmap entries (0k, 0M) in use
--8075--  memcheck: auxmaps: 0 searches, 0 comparisons
--8075--  memcheck: secondaries: 12 issued (768k, 0M)
--8075--  memcheck: secondaries: 27 accessible and distinguished (1728k, 1M)
--8075--     tt/tc: 6,191 tt lookups requiring 6,294 probes
--8075--     tt/tc: 6,191 fast-cache updates, 2 flushes
--8075-- translate: new        3,089 (70,422 -> 1,151,511; ratio 163:10) [0 scs]
--8075-- translate: dumped     0 (0 -> ??)
--8075-- translate: discarded  0 (0 -> ??)
--8075-- scheduler: 120,278 jumps (bb entries).
--8075-- scheduler: 2/3,340 major/minor sched events.
--8075--    sanity: 3 cheap, 1 expensive checks.
--8075--    exectx: 30,011 lists, 88 contexts (avg 0 per list)
--8075--    exectx: 161 searches, 73 full compares (453 per 1000)
--8075--    exectx: 0 cmp2, 38 cmp4, 0 cmpAll