[TuxKart-devel] Valgrind: hunting possible leaks

[Pascal G. <pa...@gu...>]

With valgrind 2.2, i used the following:

valgrind --tool=memcheck --leak-check=yes ./tuxkart 2> /tmp/leaks.log

the first thing i notice is that the following apears very frequently (27
times just by making my way thru until i reach the track selection screen)
along the way:

==1520== Syscall param ioctl(generic) contains uninitialised or unaddressable
byte(s)
==1520==    at 0x4334AA54: ioctl (in /lib/tls/libc-2.3.2.so)
==1520==    by 0x4497DA91: (within /usr/lib/tls/libGL.so.1.0.5336)
==1520==  Address 0x52BFE3B0 is on thread 1's stack


Some other interesting parts:
-----------------------------

==1520== Use of uninitialised value of size 2
==1520==    at 0x4EED76EA: slSample::changeRate(int) (in
/usr/lib/libplibsl.so.1.8.3)
==1520==    by 0x4EED7366: slSample::autoMatch(slDSP const*) (in
/usr/lib/libplibsl.so.1.8.3)
==1520==    by 0x8070AD9: SoundSystem::SoundSystem() (sl.h:240)
==1520==    by 0x8070F71: initTuxKart(int, int, int) (start_tuxkart.cxx:87)

==1520== Conditional jump or move depends on uninitialised value(s)
==1520==    at 0x1B904A38: strcmp (mac_replace_strmem.c:251)
==1520==    by 0x80702D1: SoundSystem::change_track(char const*) (sound.cxx:57)
==1520==    by 0x8070B18: SoundSystem::SoundSystem() (sound.cxx:113)
==1520==    by 0x8070F71: initTuxKart(int, int, int) (start_tuxkart.cxx:87)


Another one that appears frequently:
------------------------------------

==1520== Use of uninitialised value of size 4
==1520==    at 0x4EEF6E0F: sgBox::extend(float const*) (in
/usr/lib/libplibsg.so.1.8.3)
==1520==    by 0x4F021436: ssgVtxTable::recalcBSphere() (in
/usr/lib/libplibssg.so.1.8.3)
==1520==    by 0x4F02030C: ssgVtxTable::ssgVtxTable(unsigned, ssgVertexArray*,
ssgNormalArray*, ssgTexCoordArray*, ssgColourArray*) (in
/usr/lib/libplibssg.so.1.8.3)
==1520==    by 0x80798F5: ParticleSystem::ParticleSystem(int, int, float, int,
float, float) (ssg.h:159)

I'll stop here for now...

To say the least, i don't really understand how i should react to those
informations... 
Almost all entries mention my /usr/lib/tls/libGL.so.1.0.5336, but if it gets
called the wrong way, it's just plain normal.

I'll try kcachegrind to see if i can get to understand more.

-Pascal
--
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