[Boost-users] segfault happens when I serialize nested class in apache module

Subject: [Boost-users] segfault happens when I serialize nested class in apache module
From: Hassan Monfared (hmonfared_at_[hidden])
Date: 2012-07-25 00:40:39

Hi all,
Serializing simple class "A" in Apache module done without error but when I
tried to serialize my complex object like "X" which has a member, type of
"A", I got segfault in Apache module. ( this doesn't happen to a
executable console application )

------------------------- here is my code : ---------------------
class A {
private:
friend class boost::serialization::access; // to enable boost "access"
class to call private "serialize" method of class "A"
template<class ArchT>
void serialize(ArchT &ar, unsigned int version) {   // method for both
serializing and deserializing
ar & memA; // (de)serialize member "memA"
}
std::string memA; // sample member
public:
A(){}
A(std::string pmemA) :
memA(pmemA) {
}
std::string GetMemA()
{
return memA;
}
};
class X {

private:
friend class boost::serialization::access;
template<class ArchT>
void serialize(ArchT &ar, unsigned int version) {
ar & memX;
ar & a;
}
std::string memX;
A a;
public:
X(std::string pmemX, A pa) :
memX(pmemX), a(pa) {
}
X(){}

};
-------------------
                        string st=GetRandomFileName();
ofstream out(st.c_str());
boost::archive::text_oarchive out_r(out);
A a("Amem");
X x("Xmem", a);
out_r << x; // not works
                        out_r << a; // works!

------------------- here is stack trace from gdb for apache ----------------

Program received signal SIGSEGV, Segmentation fault.
0xb39b846e in ?? ()
(gdb) backtrace
#0  0xb39b846e in ?? ()
#1  0xb722379e in
boost::serialization::typeid_system::extended_type_info_typeid_0::is_less_than(boost::serialization::extended_type_info
const&) const () from /tmp/libIRSProWebApacheModule.so
#2  0xb7223c61 in
std::_Rb_tree<boost::serialization::typeid_system::extended_type_info_typeid_0
const*, boost::serialization::typeid_system::extended_type_info_typeid_0
const*,
std::_Identity<boost::serialization::typeid_system::extended_type_info_typeid_0
const*>, boost::serialization::typeid_system::type_compare,
std::allocator<boost::serialization::typeid_system::extended_type_info_typeid_0
const*>
>::_M_insert_equal(boost::serialization::typeid_system::extended_type_info_typeid_0
const* const&) () from /tmp/libIRSProWebApacheModule.so
#3  0xb7223b37 in
boost::serialization::typeid_system::extended_type_info_typeid_0::type_register(std::type_info
const&)
    () from /tmp/libIRSProWebApacheModule.so
#4  0xb72066d2 in
boost::serialization::extended_type_info_typeid<A>::extended_type_info_typeid
(this=0xb735a638)
    at /usr/include/boost/serialization/extended_type_info_typeid.hpp:89
#5  0xb720650d in
boost::serialization::detail::singleton_wrapper<boost::serialization::extended_type_info_typeid<A>
>::singleton_wrapper (this=0xb735a638) at
/usr/include/boost/serialization/singleton.hpp:106
#6  0xb7206572 in
boost::serialization::singleton<boost::serialization::extended_type_info_typeid<A>
>::get_instance ()
    at /usr/include/boost/serialization/singleton.hpp:128
#7  0xb72064e3 in
boost::serialization::singleton<boost::serialization::extended_type_info_typeid<A>
>::get_const_instance () at
/usr/include/boost/serialization/singleton.hpp:141
#8  0xb720637b in
boost::archive::detail::oserializer<boost::archive::text_oarchive,
A>::oserializer (this=0xb735a62c)
    at /usr/include/boost/archive/detail/oserializer.hpp:112
#9  0xb7206253 in
boost::serialization::detail::singleton_wrapper<boost::archive::detail::oserializer<boost::archive::text_oarchive,
A> >::singleton_wrapper (this=0xb735a62c) at
/usr/include/boost/serialization/singleton.hpp:106
#10 0xb72062b8 in
boost::serialization::singleton<boost::archive::detail::oserializer<boost::archive::text_oarchive,
A> >::get_instance () at /usr/include/boost/serialization/singleton.hpp:128
#11 0xb71fb0ec in __static_initialization_and_destruction_1
(__initialize_p=1, __priority=65535)
    at /usr/include/boost/serialization/singleton.hpp:149
#12 0xb71fb161 in _GLOBAL__sub_I_IRSProWeb_InputFilter.cc(void) () at
../IRSProWeb_InputFilter.cc:242
#13 0xb7fee7fb in ?? () from /lib/ld-linux.so.2
#14 0xb7fee8e4 in ?? () from /lib/ld-linux.so.2
#15 0xb7ff2819 in ?? () from /lib/ld-linux.so.2
#16 0xb7fee61f in ?? () from /lib/ld-linux.so.2
#17 0xb7ff20c4 in ?? () from /lib/ld-linux.so.2
#18 0xb7d31be9 in ?? () from /lib/i386-linux-gnu/libdl.so.2
#19 0xb7fee61f in ?? () from /lib/ld-linux.so.2
#20 0xb7d3233a in ?? () from /lib/i386-linux-gnu/libdl.so.2
#21 0xb7d31c97 in dlopen () from /lib/i386-linux-gnu/libdl.so.2
#22 0xb7f3d100 in apr_dso_load (res_handle=0xbfffef08, path=0x8140b78
"/tmp/libIRSProWebApacheModule.so", pool=0x8140ab0)
    at dso/unix/dso.c:139
#23 0xb77587c7 in load_cpp_module (pool=0x8140ab0, server=0x8100ea8,
server_rec=0x816dbc0, next=0x8140b50)
    at apache_handler.cpp:140
#24 0xb7757680 in load_handler (pool=0x8140ab0, server=0x8100ea8,
server_rec=0x816dbc0, next=0x8140b50)
    at mod_cplusplus.c:83
#25 0xb77576d2 in load_handlers (pool=0x8140ab0, server=0x8100ea8,
server_rec=0x816dbc0) at mod_cplusplus.c:89
#26 0xb7757737 in cpp_spawn_handlers (p=0x8140ab0, s=0x8100ea8) at
mod_cplusplus.c:100
#27 0x0808b748 in ap_run_child_init (pchild=0x8140ab0, s=0x8100ea8) at
config.c:166
#28 0x080af138 in child_main (child_num_arg=0) at event.c:2028
#29 0x080af464 in make_child (s=0x8100ea8, slot=0) at event.c:2169
#30 0x080af5ae in startup_children (number_to_start=3) at event.c:2233
#31 0x080afeba in event_run (_pconf=0x80dc0a8, plog=0x813caa0, s=0x8100ea8)
at event.c:2561
#32 0x0806fa6d in ap_run_mpm (pconf=0x80dc0a8, plog=0x813caa0, s=0x8100ea8)
at mpm_common.c:98
#33 0x08068fc4 in main (argc=2, argv=0xbffff3b4) at main.c:777