Re: [Boost-users] array deserialization problem

From: Matthias Troyer (troyer_at_[hidden])
Date: 2008-06-26 02:58:02

The reason is that array deserialization does not allocate memory for  
the array, but assumes that the memory has already been allocated. In  
your case, you allocate memory in the constructor taking three  
arguments, but not in the default constructor. Hence the segmentation  
fault.

Matthias

On Jun 25, 2008, at 10:04 PM, michalurbanski wrote:

> Hi all,
>
> I have a problem deserializing an array. With the code (1) I get a
> Segmenetation Fault with stacktrace (2).
>
> Any help appriciated.
>
> Kind regards,
> MU.
>
>
> ------------------------------------------------------------
> Attachment (1):
>
> #include <fstream>
> #include <iostream>
> #include <boost/archive/xml_iarchive.hpp>
> #include <boost/archive/xml_oarchive.hpp>
> #include <boost/serialization/array.hpp>
> #include <boost/serialization/export.hpp>
>
> using namespace std;
>
> class Test {
> private:	
> 	friend class boost::serialization::access;
> 	
> 	template<class Archive>
> 	void serialize(Archive & ar, const unsigned int version) {
> 		ar & BOOST_SERIALIZATION_NVP(a);
> 		ar & BOOST_SERIALIZATION_NVP(b);
> 		ar & boost::serialization::make_array<float>(c, 1);
> 	}
> 	
> 	int a;
> 	int b;
> 	float* c;
> public:
> 	inline Test() {
> 		c = 0;
> 	}
> 	
> 	inline Test(int a, int b, float c) {
> 		this->a = a;
> 		this->b = b;
> 		this->c = new float[1];
> 		this->c[0] = c;
> 	}
> 	
> 	inline void display() {
> 		cout << "a:" << a << endl;
> 		cout << "b:" << b << endl;
> 		cout << "*c:" << *c << endl;
> 	}
> };
>
> BOOST_CLASS_EXPORT(Test)
>
> int main() {	
>    // SERIALIZE:
>    std::ofstream ofs("filename.xml");
>
>    Test* t = new Test(1, 2, 3.3);
> 	
>    boost::archive::xml_oarchive oa(ofs);
>    oa << BOOST_SERIALIZATION_NVP(t);
> 	
>    ofs.close();
>
>    // DESERIALIZE:
>    std::ifstream ifs("filename.xml");
>    Test* t2;
>
>    boost::archive::xml_iarchive ia(ifs);
>    ia >> BOOST_SERIALIZATION_NVP(t2);
>
>    t2->display();
>
>    return 0;
> }
>
> ------------------------------------------------------------
> Attachment 2:
>
> 51 std::__convert_to_v<float>()  0xb7e6bc5f	
> 50 std::num_get<char, std::istreambuf_iterator<char,  
> std::char_traits<char>
>>> ::do_get()  0xb7e33c8a	
> 49 std::istream::operator>>()  0xb7e1c9c7	
> 48
> boost::archive::basic_text_iprimitive<std::istream>::load<float>()
> /usr/local/include/boost-1_35/boost/archive/ 
> basic_text_iprimitive.hpp:80
> 0x0804e687	
> 47
> boost 
> ::archive 
> ::xml_iarchive_impl<boost::archive::xml_iarchive>::load<float>() / 
> usr/local/include/boost-1_35/boost/archive/xml_iarchive.hpp:58
> 0x0804e6a9	
> 46
> boost 
> ::archive::load_access::load_primitive<boost::archive::xml_iarchive,
> float>()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:96
> 0x0804e6c4	
> 45
> boost 
> ::archive::detail::load_non_pointer_type<boost::archive::xml_iarchive,
> float>::load_primitive::invoke()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:339
> 0x0804e6de	
> 44
> boost 
> ::archive::detail::load_non_pointer_type<boost::archive::xml_iarchive,
> float>::invoke()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:414
> 0x0804e6f8	
> 43 boost::archive::load<boost::archive::xml_iarchive, float>()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:561
> 0x0804e712	
> 42
> boost 
> ::archive 
> ::detail 
> ::common_iarchive 
> <boost::archive::xml_iarchive>::load_override<float>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> common_iarchive.hpp:59
> 0x0804e736	
> 41
> boost 
> ::archive 
> ::basic_xml_iarchive 
> <boost::archive::xml_iarchive>::load_override<float>()
> /usr/local/include/boost-1_35/boost/archive/basic_xml_iarchive.hpp:81
> 0x0804e77a	
> 40
> boost 
> ::archive 
> ::xml_iarchive_impl 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::load_override<boost::serialization::nvp<float>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/xml_iarchive.hpp:74
> 0x0804e7b6	
> 39
> boost 
> ::archive 
> ::detail 
> ::interface_iarchive 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::operator>><boost::serialization::nvp<float> const>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> interface_iarchive.hpp:63
> 0x0804e7e2	
> 38
> boost 
> ::archive 
> ::detail 
> ::interface_iarchive 
> < 
> boost 
> ::archive::xml_iarchive>::operator&<boost::serialization::nvp<float>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> interface_iarchive.hpp:70
> 0x0804e812	
> 37
> boost 
> ::serialization 
> ::array<float>::serialize<boost::archive::xml_iarchive>() /usr/local/ 
> include/boost-1_35/boost/serialization/array.hpp:39
> 0x0804e86b	
> 36  
> boost::serialization::access::serialize<boost::archive::xml_iarchive,
> boost::serialization::array<float> >()
> /usr/local/include/boost-1_35/boost/serialization/access.hpp:109
> 0x0804e89b	
> 35 boost::serialization::serialize<boost::archive::xml_iarchive,
> boost::serialization::array<float> >()
> /usr/local/include/boost-1_35/boost/serialization/serialization.hpp:81
> 0x0804e8bd	
> 34 boost::serialization::serialize_adl<boost::archive::xml_iarchive,
> boost::serialization::array<float> >()
> /usr/local/include/boost-1_35/boost/serialization/serialization.hpp: 
> 140
> 0x0804e8fb	
> 33
> boost 
> ::archive::detail::load_non_pointer_type<boost::archive::xml_iarchive,
> boost::serialization::array<float> >::load_only::invoke()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:349
> 0x0804e91e	
> 32
> boost 
> ::archive::detail::load_non_pointer_type<boost::archive::xml_iarchive,
> boost::serialization::array<float> >::invoke()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:414
> 0x0804e938	
> 31 boost::archive::load<boost::archive::xml_iarchive,
> boost::serialization::array<float> >()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:561
> 0x0804e952	
> 30 boost::archive::load_wrapper<boost::archive::xml_iarchive,
> boost::serialization::array<float> >()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:583
> 0x0804e96c	
> 29 boost::archive::load<boost::archive::xml_iarchive,
> boost::serialization::array<float> >()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:589
> 0x0804e98e	
> 28
> boost 
> ::archive 
> ::detail 
> ::common_iarchive 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::load_override<boost::serialization::array<float>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> common_iarchive.hpp:59
> 0x0804e9b2	
> 27
> boost 
> ::archive 
> ::basic_xml_iarchive 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::load_override<boost::serialization::array<float>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/basic_xml_iarchive.hpp:66
> 0x0804e9d4	
> 26
> boost 
> ::archive 
> ::xml_iarchive_impl 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::load_override<boost::serialization::array<float>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/xml_iarchive.hpp:74
> 0x0804e9f6	
> 25
> boost 
> ::archive 
> ::detail 
> ::interface_iarchive 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::operator>><boost::serialization::array<float>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> interface_iarchive.hpp:63
> 0x0804ea22	
> 24
> boost 
> ::archive 
> ::detail 
> ::interface_iarchive 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::operator&<boost::serialization::array<float> const>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> interface_iarchive.hpp:70
> 0x0804ea52	
> 23 Test::serialize<boost::archive::xml_iarchive>()
> /home/wojtek/workspaceCDT/test_serial/src/main.cpp:18 0x0804eaf9	
> 22  
> boost::serialization::access::serialize<boost::archive::xml_iarchive,
> Test>() /usr/local/include/boost-1_35/boost/serialization/access.hpp: 
> 109
> 0x0804eb1b	
> 21 boost::serialization::serialize<boost::archive::xml_iarchive,  
> Test>()
> /usr/local/include/boost-1_35/boost/serialization/serialization.hpp:81
> 0x0804eb3d	
> 20 boost::serialization::serialize_adl<boost::archive::xml_iarchive,
> Test>()
> /usr/local/include/boost-1_35/boost/serialization/serialization.hpp: 
> 140
> 0x0804eb7b	
> 19 boost::archive::detail::iserializer<boost::archive::xml_iarchive,
> Test>::load_object_data()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:160
> 0x0804ec28	
> 18 boost::archive::detail::basic_iarchive::load_object()  0xb7ee30bc	
> 17
> boost 
> ::archive::detail::load_non_pointer_type<boost::archive::xml_iarchive,
> Test>::load_standard::invoke()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:364
> 0x0804ed2b	
> 16
> boost 
> ::archive::detail::load_non_pointer_type<boost::archive::xml_iarchive,
> Test>::invoke()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:414
> 0x0804ed46	
> 15 boost::archive::load<boost::archive::xml_iarchive, Test>()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:561
> 0x0804ed60	
> 14
> boost 
> ::archive 
> ::detail 
> ::common_iarchive<boost::archive::xml_iarchive>::load_override<Test>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> common_iarchive.hpp:59
> 0x0804ed84	
> 13
> boost 
> ::archive 
> ::basic_xml_iarchive 
> <boost::archive::xml_iarchive>::load_override<Test>()
> /usr/local/include/boost-1_35/boost/archive/basic_xml_iarchive.hpp:81
> 0x0804edc8	
> 12
> boost 
> ::archive 
> ::xml_iarchive_impl 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::load_override<boost::serialization::nvp<Test>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/xml_iarchive.hpp:74
> 0x0804ee04	
> 11
> boost 
> ::archive 
> ::detail 
> ::interface_iarchive 
> < 
> boost 
> ::archive::xml_iarchive>::operator>><boost::serialization::nvp<Test>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> interface_iarchive.hpp:63
> 0x0804ee30	
> 10
> boost 
> ::archive::detail::pointer_iserializer<boost::archive::xml_iarchive,
> Test>::load_object_ptr()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:303
> 0x0804ef27	
> 9 boost::archive::detail::basic_iarchive_impl::load_pointer()   
> 0xb7ee3fc4	
> 8 boost::archive::detail::basic_iarchive::load_pointer()  0xb7ee3159	
> 7  
> boost 
> ::archive::detail::load_pointer_type<boost::archive::xml_iarchive,
> Test*>::invoke()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:479
> 0x0804ffa6	
> 6 boost::archive::load<boost::archive::xml_iarchive, Test*>()
> /usr/local/include/boost-1_35/boost/archive/detail/iserializer.hpp:561
> 0x08050000	
> 5
> boost 
> ::archive 
> ::detail 
> ::common_iarchive 
> <boost::archive::xml_iarchive>::load_override<Test*>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> common_iarchive.hpp:59
> 0x08050024	
> 4
> boost 
> ::archive 
> ::basic_xml_iarchive 
> <boost::archive::xml_iarchive>::load_override<Test*>()
> /usr/local/include/boost-1_35/boost/archive/basic_xml_iarchive.hpp:81
> 0x08050068	
> 3
> boost 
> ::archive 
> ::xml_iarchive_impl 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::load_override<boost::serialization::nvp<Test*>  
> const>()
> /usr/local/include/boost-1_35/boost/archive/xml_iarchive.hpp:74
> 0x080500a4	
> 2
> boost 
> ::archive 
> ::detail 
> ::interface_iarchive 
> < 
> boost 
> ::archive 
> ::xml_iarchive>::operator>><boost::serialization::nvp<Test*> const>()
> /usr/local/include/boost-1_35/boost/archive/detail/ 
> interface_iarchive.hpp:63
> 0x080500d0	
> 1 main() /home/wojtek/workspaceCDT/test_serial/src/main.cpp:61  
> 0x0804c542	
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