id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12271	segfaults in options_description with -fipa-pta	Seth <sshannin@…>	Vladimir Prus	"With gcc-6.1.0, I'm seeing a lot of segfaults associated with boost::program_options::options_description. I had an older, but recent version of gcc lying around (5.3.0) that did not exhibit this behavior, so there's a decent chance that the fault lines in gcc itself vs. a newly exhibited bug here.

If I make an empty one and just let it fall out of scope, I get a segfault from the destructor:
{{{
seth@luca:~$ cat example.cpp 
#include <boost/program_options.hpp>

int main() {
    boost::program_options::options_description d;
    return 0;
}
seth@luca:~$ g++ -g3 example.cpp -llibboost_program_options -fipa-pta -o example 
seth@luca:~$ gdb ./example
(gdb) r
Starting program: /home/seth/./example 
Traceback (most recent call last):

Program received signal SIGSEGV, Segmentation fault.
0x00000000004026db in boost::detail::atomic_exchange_and_add (pw=0x200c5f2d8d48e02c, dv=-1)
    at /toolchain/toolchain9/include/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp:50
50          );
(gdb) bt
#0  0x00000000004026db in boost::detail::atomic_exchange_and_add (pw=0x200c5f2d8d48e02c, dv=-1)
    at /toolchain/toolchain9/include/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp:50
#1  0x0000000000402709 in boost::detail::sp_counted_base::release (this=0x200c5f2d8d48e024)
    at /toolchain/toolchain9/include/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp:144
#2  0x00000000004027a7 in boost::detail::shared_count::~shared_count (this=0x4033a8 <__libc_csu_init+8>, __in_chrg=<optimized out>)
    at /toolcain/toolchain9/include/boost/smart_ptr/detail/shared_count.hpp:473
#3  0x0000000000402de0 in boost::shared_ptr<boost::program_options::options_description>::~shared_ptr (this=0x4033a0 <__libc_csu_init>, 
    __in_chrg=<optimized out>) at /toolchain/toolchain9/include/boost/smart_ptr/shared_ptr.hpp:336
#4  0x0000000000402dfb in std::_Destroy<boost::shared_ptr<boost::program_options::options_description> > (__pointer=0x4033a0 <__libc_csu_init>)
    at /toolchain/toolchain9/include/c++/6.1.0/bits/stl_construct.h:93
#5  0x0000000000402ce9 in std::_Destroy_aux<false>::__destroy<boost::shared_ptr<boost::program_options::options_description>*> (
    __first=0x4033a0 <__libc_csu_init>, __last=0x0) at /toolchain/toolchain9/include/c++/6.1.0/bits/stl_construct.h:103
#6  0x0000000000402b98 in std::_Destroy<boost::shared_ptr<boost::program_options::options_description>*> (__first=0x4033a0 <__libc_csu_init>, 
    __last=0x0) at /toolchain/toolchain9/include/c++/6.1.0/bits/stl_construct.h:126
#7  0x0000000000402a23 in std::_Destroy<boost::shared_ptr<boost::program_options::options_description>*, boost::shared_ptr<boost::program_options::options_description> > (__first=0x4033a0 <__libc_csu_init>, __last=0x0) at /toolchain/toolchain9/include/c++/6.1.0/bits/stl_construct.h:151
#8  0x000000000040288b in std::vector<boost::shared_ptr<boost::program_options::options_description>, std::allocator<boost::shared_ptr<boost::program_options::options_description> > >::~vector (this=0x7fffffffdf58, __in_chrg=<optimized out>)
    at /toolchain/toolchain9/include/c++/6.1.0/bits/stl_vector.h:426
#9  0x00000000004027c6 in boost::program_options::options_description::~options_description (this=0x7fffffffdef0, __in_chrg=<optimized out>)
    at /toolchain/toolchain9/include/boost/program_options/options_description.hpp:173
#10 0x00000000004026b9 in main () at example.cpp:4
}}}

Alternatively, if I actually add any options, it segfaults during that:
{{{
seth@luca:~$ cat example2.cpp
#include <boost/program_options.hpp>

int main() {
    namespace po = boost::program_options;
    po::options_description d;

    int x = 0;
    d.add_options() (""xs,x"", po::value(&x));
    return 0;
}

Program received signal SIGSEGV, Segmentation fault.
0x000000000040dc66 in push_back (__x=<optimized out>, this=<optimized out>) at /toolchain/toolchain9/include/c++/6.1.0/bits/stl_bvector.h:89
89              *_M_p &= ~_M_mask;
(gdb) bt
#0  0x000000000040dc66 in push_back (__x=<optimized out>, this=<optimized out>) at /toolchain/toolchain9/include/c++/6.1.0/bits/stl_bvector.h:89
#1  add () at libs/program_options/src/options_description.cpp:288
#2  boost::program_options::options_description_easy_init::operator() (this=0x4, name=0x7fffffffdee0 "" \305\334\367\377\177"", s=0x62ed80)
    at libs/program_options/src/options_description.cpp:246
#3  0x0000000000403d78 in main () at example2.cpp:8
}}}

{{{
seth@luca:~$ g++ --version
g++ (GCC) 6.1.0
Copyright (C) 2016 Free Software Foundation, Inc.
}}}

I'm linking statically against program_options.

Let me know if there's any more information I can provide that would be helpful."	Bugs	new	To Be Determined	program_options	Boost 1.60.0	Problem		segfault options_description