Re: [Boost-users] [filesystem] Strange seg.faults of boost::filesystem under ElectricFence

Subject: Re: [Boost-users] [filesystem] Strange seg.faults of boost::filesystem under ElectricFence
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2009-07-25 03:20:49

Pavel Shevaev wrote:

> Folks, I'm trying to spot a memory corruption error in my application
> using ElectricFence[1] and I'm facing really weird segfaults in
> boost::filesystem.
> I don't really believe it is boost::filesystem which causes a
> seg.fault but rather my improper usage of ElectricFence.
> 
> Here is the most interesting part of the core dump:
> 
> #0  0x00007f2b4aa1c517 in kill () from /lib/libc.so.6
> #1  0x000000000048f46b in on_signal (s=4) at main.cpp:180
> #2  <signal handler called>
> #3  0x00007f2b4aa1c517 in kill () from /lib/libc.so.6
> #4  0x00007f2b4b4e746f in ?? () from /usr/lib/libefence.so.0
> #5  0x00007f2b4b4e8290 in _eff_deallocate () from /usr/lib/libefence.so.0
> #6  0x00007f2b4b4e884e in _eff_allocate () from /usr/lib/libefence.so.0
> #7  0x00007f2b4b4e7288 in operator new () from /usr/lib/libefence.so.0
> #8  0x00007f2b4b27d711 in std::string::_Rep::_S_create () from
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.3.3/libstdc++.so.6
> #9  0x00007f2b4b27e0d5 in ?? () from
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.3.3/libstdc++.so.6
> #10 0x00007f2b4b27e213 in std::basic_string<char,
> std::char_traits<char>, std::allocator<char> >::basic_string ()
>    from /usr/lib/gcc/x86_64-pc-linux-gnu/4.3.3/libstdc++.so.6
> #11 0x00007f2b4cbaa81e in boost::filesystem::detail::dir_itr_first ()
>    from /home/game/hg/master_49100/shared/scripts/../lib/boost/build/lib/libboost_filesystem-mt.so
> 
> Basically the following line in my app cases the seg.fault:
> 
> boost::filesystem::directory_iterator dir_iter(path);
> 
> Inspecting path variable under gdb shows it's ok and actuall directory exists.
> 
> Here is some information about my application:
> 
> * built with gcc-4.3.3
> * runs under linux-2.6.29-gentoo
> * uses boost-1.35
> * boost is built with options: ./bjam link=shared --build-type=minimal
> --layout=system --toolset=gcc
> * ElectricFence built from gentoo package efence-2.4.13-r1
> 
> The question is whether there are any special boost build options
> which should be used with ElectricFence.

None that I know. You can add variant=debug but that's no really specific
to efence. 

Sorry for not being overly helpful,
Volodya