valgrind 3.8.1 warnings when doing calloc in jemalloc 3.4

[Piyush Patel]

I've ran into similar issue that Daniel Mezzato ran into(email thread around Dec 11, 2012).  I get following warnings:

==28997== Conditional jump or move depends on uninitialised value(s)
==28997==    at 0x4E438C1: arena_run_split (arena.c:454)
==28997==    by 0x4E441DF: arena_run_alloc_helper (arena.c:645)
==28997==    by 0x4E469ED: arena_malloc_large (arena.c:665)
==28997==    by 0x4E3BA48: calloc (arena.h:930)
==28997==    by 0x400661: main (jemalloc_test.cpp:8)
==28997== 
==28997== Conditional jump or move depends on uninitialised value(s)
==28997==    at 0x4E438E9: arena_run_split (arena.c:454)
==28997==    by 0x4E441DF: arena_run_alloc_helper (arena.c:645)
==28997==    by 0x4E469ED: arena_malloc_large (arena.c:665)
==28997==    by 0x4E3BA48: calloc (arena.h:930)
==28997==    by 0x400661: main (jemalloc_test.cpp:8)


Wondering if these are benin or something I need to worry about.

Below are details of the program and my system
-----------------------------------------------------------------------------------
The small program does following:
int
main(int argc, char** argv)
{
    char *str = (char*)calloc(8192, 1);
    free(str);

    return 0;
}


It's compiled as:
g++  -g -L<path to jemalloc>   jemalloc_test.cpp   -o jemalloc_test -ljemalloc

Valgrind 3.8.1 run as:
valgrind --leak-check=full --soname-synonyms=somalloc=NONE ./jemalloc_test

My system info:
----------------------------
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) 

valgrind --version
valgrind-3.8.1

jemalloc: 3.4.0

 uname -a
Linux piyush-personal 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Thanks,
Piyush