Re: [Boost-users] [Serialization] issue withportable_binary_oarchive

Hi Robert, Were you able to find the source of this failure ? Thanks Dan Leibovich -----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: ו 02 מרץ 2007 02:47 To: boost-users@lists.boost.org Subject: Re: [Boost-users] [Serialization] issue withportable_binary_oarchive For starters, you should use ios::binary flag on the files. But still I have a problem with this - I'm looking into it. Robert Ramey Dan Leibovich wrote:

Hi again,

I was able to create a minimal test case to reproduce the problem. I found that the problem occurs when a class includes a pointer to the same type as the class.

I added the following to portable_binary_oarchive.hpp void save(const unsigned short t){ save_impl(t); } void save(const short t){ save_impl(t); }

and to portable_binary_iarchive.hpp void load(unsigned short & t){ long l; load_impl(l, sizeof(unsigned short)); t = l; } void load(short & t){ long l; load_impl(l, sizeof(short)); t = l; }

The program below fails on asserts: When the class has virtual method:

boost/archive/basic_binary_iprimitive.hpp:112: void boost::archive::basic_binary_iprimitive::load_binary(void*, unsigned int) [with Archive = portable_binary_iarchive, IStream = std::basic_istream]: Assertion `static_caststd::size_t((std::numeric_limitsstd::streamsize::max)( ))

...

= count' failed.

otherwise:

basic_iarchive.cpp:466: const boost::archive::detail::basic_pointer_iserializer* boost::archive::detail::basic_iarchive_impl::load_pointer(boost::archi ve::detail::basic_iarchive&, void*&, const boost::archive::detail::basic_pointer_iserializer*, const boost::archive::detail::basic_pointer_iserializer*(*)(const boost::serialization::extended_type_info&)): Assertion `new_cid == cid' failed.

The program:

#include #include "portable_binary_oarchive.hpp" #include "portable_binary_iarchive.hpp" #include <fstream>

class A { public: int x; A* a ;

template<class Archive> void serialize (Archive & ar, const unsigned int version) { ar & x ; ar & a ; }

A() {} A(int x_) : x(x_), a(0) {} virtual void foo() {} ; // if removed - another kind of assert };

int main() { char* file = "file" ; std::ofstream ofs(file) ; portable_binary_oarchive oar(ofs) ; const A a(1);

oar << a ;

ofs.close() ;

A aa ;

std::ifstream ifs(file) ; portable_binary_iarchive iar(ifs) ; iar >> aa ; }

Thanks, Dan Leibovich

-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: ã 28 ôáøåàø 2007 22:05 To: boost-users@lists.boost.org Subject: Re: [Boost-users] [Serialization] issue withportable_binary_oarchive

Hmm- that would seem to suggest that bpis_ptr is NULL or something.

I would guess that browsing the stack trace with the debugger might shed light here. It that doesn't resolve the issue, make a small program that illustrates the problem so I can run it here.

Note that in my previous email, I suggested a change in the one of the libraries headers involving loading and const. It turns out that this change isn't appropriate. I presume you found that as it fails to compile.

I don't think this issue would be affected by moving to a later version.

Robert Ramey

Dan Leibovich wrote:

...

Hi,

I have added the specializations methods for short and now the serialization output is the same for both platforms (linux and solaris).

But when I try to load the dump file, the program received seg fault signal in boost::archive::detail::basic_iarchive_impl::load_pointer() on: bpis_ptr->load_object_ptr(ar, t, co.file_version);

I will be happy to try any changes you suggest.

I have noticed (according to your code change suggestions) that I do not have the latest version of the lib. I downloaded boost 1.33.1 , should I download newer version and if so how can I do it?

Thanks Dan Leibovich

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