Valgrindでld-2.6.soでエラーが出る。

前にメモリリークを探してたときに使ってみて、えらく感激したValgrind。
ところが、最近VMに入れたFedora Core7でValgrindが上手く動かない。

a.cc

int main()
{
    return 0;
}

$ g++ a.cc
$ valgrind --leak-check=full ./a.out |& less
==21301== Memcheck, a memory error detector.
==21301== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==21301== Using LibVEX rev 1732, a library for dynamic binary translation.
==21301== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==21301== Using valgrind-3.2.3, a dynamic binary instrumentation framework.
==21301== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==21301== For more details, rerun with: -v
==21301==
==21301== Conditional jump or move depends on uninitialised value(s)
==21301==    at 0x78DBE3: _dl_relocate_object (in /lib/ld-2.6.so)
==21301==    by 0x7868D8: dl_main (in /lib/ld-2.6.so)
==21301==    by 0x796F6A: _dl_sysdep_start (in /lib/ld-2.6.so)
==21301==    by 0x7842B7: _dl_start (in /lib/ld-2.6.so)
==21301==    by 0x783816: (within /lib/ld-2.6.so)
.
.
.
==21301==
==21301== Conditional jump or move depends on uninitialised value(s)
==21301==    at 0x78DD25: _dl_relocate_object (in /lib/ld-2.6.so)
==21301==    by 0x786A84: dl_main (in /lib/ld-2.6.so)
==21301==    by 0x796F6A: _dl_sysdep_start (in /lib/ld-2.6.so)
==21301==    by 0x7842B7: _dl_start (in /lib/ld-2.6.so)
==21301==    by 0x783816: (within /lib/ld-2.6.so)
==21301==
==21301== ERROR SUMMARY: 15 errors from 8 contexts (suppressed: 0 from 0)
==21301== malloc/free: in use at exit: 0 bytes in 0 blocks.
==21301== malloc/free: 0 allocs, 0 frees, 0 bytes allocated.
==21301== For counts of detected errors, rerun with: -v
==21301== All heap blocks were freed -- no leaks are possible.

lib-2.6.soがだめっぽい。
コミットログを読んでいたら、2007-05-24 Rev.6744にglibc 2.6 supportと書いてあったので、
yumで入れた3.2.3を捨てて3.3.0.SVNを入れてみることに。

$ sudo yum remove valgrind
$ svn co svn://svn.valgrind.org/valgrind/trunk valgrind
$ cd valgrind
$ ./autogen.sh
$ make
$ sudo make install

 $ valgrind --leak-check=full ./a.out |& less
==29561== Memcheck, a memory error detector.
==29561== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==29561== Using LibVEX rev 1775, a library for dynamic binary translation.
==29561== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==29561== Using valgrind-3.3.0.SVN, a dynamic binary instrumentation framework.
==29561== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==29561== For more details, rerun with: -v
==29561==
==29561==
==29561== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 15 from 1)
==29561== malloc/free: in use at exit: 0 bytes in 0 blocks.
==29561== malloc/free: 0 allocs, 0 frees, 0 bytes allocated.
==29561== For counts of detected errors, rerun with: -v
==29561== All heap blocks were freed -- no leaks are possible.

ld-2.6.soで文句は言わなくなった。
一応、ちゃんとリークを検出してくるかも試してみる。

a.cc

int main()
{
  int* p = new int;  
  return 0;
}

$ g++ a.cc
$ valgrind --leak-check=full ./a.out 2| less
==29603== Memcheck, a memory error detector.
==29603== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==29603== Using LibVEX rev 1775, a library for dynamic binary translation.
==29603== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==29603== Using valgrind-3.3.0.SVN, a dynamic binary instrumentation framework.
==29603== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==29603== For more details, rerun with: -v
==29603==
==29603==
==29603== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 1)
==29603== malloc/free: in use at exit: 4 bytes in 1 blocks.
==29603== malloc/free: 1 allocs, 0 frees, 4 bytes allocated.
==29603== For counts of detected errors, rerun with: -v
==29603== searching for pointers to 1 not-freed blocks.
==29603== checked 92,764 bytes.
==29603==
==29603== 4 bytes in 1 blocks are definitely lost in loss record 1 of 1
==29603==    at 0x4005D4C: operator new(unsigned) (vg_replace_malloc.c:221)
==29603==    by 0x8048490: main (in /home/tetsujin/work/val/a.out)
==29603==
==29603== LEAK SUMMARY:
==29603==    definitely lost: 4 bytes in 1 blocks.
==29603==      possibly lost: 0 bytes in 0 blocks.
==29603==    still reachable: 0 bytes in 0 blocks.
==29603==         suppressed: 0 bytes in 0 blocks.

とりあえずOKかな。