C++ Boost:反序列化自定义C++;对象通过ZeroMQ pull套接字传递
我在这里写的文本是一个后续问题,我在早些时候的另一个帖子中打开了这个问题。先前线程中的编译问题已通过使用textarchive类型而不是binaryarchive解决,但现在我在反序列化时遇到了运行时问题。为了方便起见,我在这里用一个新的问题陈述重复前面的内容。我对C++领域比较新,对任何进一步的帮助都很感激。 说明: < P>我有一个C++类,名为“强>通用消息/<强”,它只将ID和数据作为成员(参见下面的代码片段2——GyrimeMeal.HXX)。我的意图是序列化这个类的一个实例,并通过实现推模式的ZeroMQ套接字发送它 序列化和发送任务已在类ZMQHandler中实现(请参阅sendToBE函数),该类位于标题文件ZMQHandler.hxx中,如下面的代码片段3所示。该类由下面的第4个代码段所示的TestFE.cxx实例化 GenericMessage实例的接收和反序列化在下面的第五个代码段中的TestBE.cxx中实现。我的目的是通过ZMQ套接字(即pull套接字)接收GenericMessage实例,对其进行反序列化,然后将其成员打印到标准输出 问题陈述: 当我运行接收器(即TestBE.cxx)时,我在这里验证了我可以通过ZMQ套接字将数据从TestFE.cxx传输到TestBE.cxx。然而,当我试图反序列化TestBE.cxx中第28行的输入存档文件时,我得到了下面第1个代码段中显示的异常(请参见下面的第5个代码段,第28行已经标记) 在代码段5的TestBE.cxx中实现的反序列化过程中,我是否缺少一些东西?你认为我为什么会得到这个例外?可能是我在ZMQHandler.cxx(代码段3-函数sendToBE)中实现的序列化过程中缺少st。提前谢谢 代码片段1 GDB输出和回溯C++ Boost:反序列化自定义C++;对象通过ZeroMQ pull套接字传递,c++,boost,zeromq,boost-serialization,C++,Boost,Zeromq,Boost Serialization,我在这里写的文本是一个后续问题,我在早些时候的另一个帖子中打开了这个问题。先前线程中的编译问题已通过使用textarchive类型而不是binaryarchive解决,但现在我在反序列化时遇到了运行时问题。为了方便起见,我在这里用一个新的问题陈述重复前面的内容。我对C++领域比较新,对任何进一步的帮助都很感激。 说明: < P>我有一个C++类,名为“强>通用消息/>中的14 0x0804bcec(this=0xbffef84,t=@0xbffef70:0xbffeff8) at/usr/inc
$ gdb TestBE
GNU gdb (GDB) 7.5-ubuntu
.....
(gdb) r
Starting program: /TestBE
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xb7c12b40 (LWP 16644)]
[New Thread 0xb7411b40 (LWP 16645)]
Connecting to FE...
!!!!!!!!!!!!!!!!!!!!这里开始强>
**CHAR [22 serialization::archive 9 0 1 0
0 1 12 Hello there!]
terminate called after throwing an instance of 'std::logic_error'
what(): basic_string::_S_construct null not valid**
Program received signal SIGABRT, Aborted.
0xb7fdd424 in __kernel_vsyscall ()
(gdb) bt
#0 0xb7fdd424 in __kernel_vsyscall ()
#1 0xb7c7a1df in raise () from /lib/i386-linux-gnu/libc.so.6
#2 0xb7c7d825 in abort () from /lib/i386-linux-gnu/libc.so.6
#3 0xb7e608ad in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/i386- linux-gnu/libstdc++.so.6
#4 0xb7e5e4f3 in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#5 0xb7e5e52f in std::terminate() () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#6 0xb7e5e825 in __cxa_rethrow () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#7 0x0804c1d4 in boost::archive::detail::pointer_iserializer<boost::archive::text_iarchive, GenericMessage<std::string> >::load_object_ptr (this=0x8054444, ar=...,
x=@0x805cb40: 0x805cb50, file_version=0) at /usr/include/boost/archive/detail/iserializer.hpp:327
#8 0xb7f3839d in boost::archive::detail::basic_iarchive::load_pointer(void*&, boost::archive::detail::basic_pointer_iserializer const*, boost::archive::detail::basic_pointer_iserializer const* (*) (boost::serialization::extended_type_info const&)) () from /usr/lib/libboost_serialization.so.1.49.0
#9 0x0804bea9 in boost::archive::detail::load_pointer_type<boost::archive::text_iarchive>::invoke<GenericMes sage<std::string>*> (ar=..., t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/iserializer.hpp:524
#10 0x0804be55 in boost::archive::load<boost::archive::text_iarchive, GenericMessage<std::string>*> (ar=..., t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/iserializer.hpp:592
#11 0x0804be36 in boost::archive::detail::common_iarchive<boost::archive::text_iarchive>::load_override<Gener icMessage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/common_iarchive.hpp:66
#12 0x0804be14 in boost::archive::basic_text_iarchive<boost::archive::text_iarchive>::load_override<GenericMe ssage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/basic_text_iarchive.hpp:65
#13 0x0804bdf2 in boost::archive::text_iarchive_impl<boost::archive::text_iarchive>::load_override<GenericMes sage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/text_iarchive.hpp:82
#14 0x0804bcec in boost::archive::detail::interface_iarchive<boost::archive::text_iarchive>::operator>> <GenericMessage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/interface_iarchive.hpp:60
#15 0x0804b2a1 in main () at TestBE.cxx:28
!!!!!!!!!!!!!!!!!!!!到此结束强>
**CHAR [22 serialization::archive 9 0 1 0
0 1 12 Hello there!]
terminate called after throwing an instance of 'std::logic_error'
what(): basic_string::_S_construct null not valid**
Program received signal SIGABRT, Aborted.
0xb7fdd424 in __kernel_vsyscall ()
(gdb) bt
#0 0xb7fdd424 in __kernel_vsyscall ()
#1 0xb7c7a1df in raise () from /lib/i386-linux-gnu/libc.so.6
#2 0xb7c7d825 in abort () from /lib/i386-linux-gnu/libc.so.6
#3 0xb7e608ad in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/i386- linux-gnu/libstdc++.so.6
#4 0xb7e5e4f3 in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#5 0xb7e5e52f in std::terminate() () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#6 0xb7e5e825 in __cxa_rethrow () from /usr/lib/i386-linux-gnu/libstdc++.so.6
#7 0x0804c1d4 in boost::archive::detail::pointer_iserializer<boost::archive::text_iarchive, GenericMessage<std::string> >::load_object_ptr (this=0x8054444, ar=...,
x=@0x805cb40: 0x805cb50, file_version=0) at /usr/include/boost/archive/detail/iserializer.hpp:327
#8 0xb7f3839d in boost::archive::detail::basic_iarchive::load_pointer(void*&, boost::archive::detail::basic_pointer_iserializer const*, boost::archive::detail::basic_pointer_iserializer const* (*) (boost::serialization::extended_type_info const&)) () from /usr/lib/libboost_serialization.so.1.49.0
#9 0x0804bea9 in boost::archive::detail::load_pointer_type<boost::archive::text_iarchive>::invoke<GenericMes sage<std::string>*> (ar=..., t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/iserializer.hpp:524
#10 0x0804be55 in boost::archive::load<boost::archive::text_iarchive, GenericMessage<std::string>*> (ar=..., t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/iserializer.hpp:592
#11 0x0804be36 in boost::archive::detail::common_iarchive<boost::archive::text_iarchive>::load_override<Gener icMessage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/common_iarchive.hpp:66
#12 0x0804be14 in boost::archive::basic_text_iarchive<boost::archive::text_iarchive>::load_override<GenericMe ssage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/basic_text_iarchive.hpp:65
#13 0x0804bdf2 in boost::archive::text_iarchive_impl<boost::archive::text_iarchive>::load_override<GenericMes sage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/text_iarchive.hpp:82
#14 0x0804bcec in boost::archive::detail::interface_iarchive<boost::archive::text_iarchive>::operator>> <GenericMessage<std::string>*> (this=0xbfffef84, t=@0xbfffef70: 0xbfffeff8)
at /usr/include/boost/archive/detail/interface_iarchive.hpp:60
#15 0x0804b2a1 in main () at TestBE.cxx:28
程序收到信号SIGABRT,中止。
内核vsyscall()中的0xb7fdd424
(gdb)英国电信
#内核vsyscall()中的0 0xb7fdd424
#从/lib/i386 linux gnu/libc.so.6在raise()中输入1 0xb7c7a1df
#来自/lib/i386 linux gnu/libc.so.6的中止()中的2 0xb7c7d825
#3 0xb7e608ad位于/usr/lib/i386-linux gnu/libstdc++.so.6中的uu gnu_cxx::u verbose_terminate_handler()
#4 0xb7e5e4f3英寸??()来自/usr/lib/i386 linux gnu/libstdc++.so.6
#来自/usr/lib/i386 linux gnu/libstdc++.so.6的std::terminate()中的5 0xb7e5e52f
#来自/usr/lib/i386 linux gnu/libstdc++.so.6的
#boost::archive::detail::pointer\u iseralizer::load\u object\u ptr中的7 0x0804c1d4(this=0x8054444,ar=。。。,
x=@0x805cb40:0x805cb50,文件_version=0)位于/usr/include/boost/archive/detail/iseralizer.hpp:327
#boost::archive::detail::basic_iarchive::load_指针(void*&,boost::archive::detail::basic_指针_iseralizer const*,boost::archive::detail::basic_指针_iseralizer const*(*)(boost::serialization::extended_type_info const&)()from/usr/libboost\u serialization.so.1.49.0
#boost::archive::detail::load_pointer_type::invoke(ar=…,t=@0xbffef70:0xbffeff8)中的9 0x0804bea9
at/usr/include/boost/archive/detail/iseralizer.hpp:524
#boost::archive::load中的10 0x0804be55(ar=…,t=@0xbfffef70:0xBFFFFF8)
at/usr/include/boost/archive/detail/iseralizer.hpp:592
#boost::archive::detail::common\u iarchive::load\u覆盖中的11 0x0804be36(this=0xbffef84,t=@0xbffef70:0xbffeff8)
at/usr/include/boost/archive/detail/common_iarchive.hpp:66
#boost::archive::basic_text_iarchive::load_override中的12 0x0804be14(this=0xbfffef84,t=@0xbfffef70:0xBFFFEF8)
at/usr/include/boost/archive/basic_text_iarchive.hpp:65
#13 boost::archive::text_iarchive_impl::load_override中的0x0804bdf2(this=0xbffef84,t=@0xbffef70:0xbffeff8)
在/usr/include/boost/archive/text_iarchive.hpp:82
#boost::archive::detail::interface_iarchive::operator>>中的14 0x0804bcec(this=0xbffef84,t=@0xbffef70:0xbffeff8)
at/usr/include/boost/archive/detail/interface\u iarchive.hpp:60
#TestBE.cxx:28处的main()中的15 0x0804b2a1
代码片段2(GenericMessage.hxx)
#包括
#包括
#包括
#包括
#包括
#包括
模板
类泛型消息{
公众:
GenericMessage():
贝德(-1),
数据(空)
{}
GenericMessage(int-id,T-msg):
北斗七星,
数据(msg)
{}
~GenericMessage(){}
T getData()
{
返回数据;
}
std::string toString()
{
std::ostringstream ss;
ss您将theMsg
声明为指针(GenericMessage*theMsg;
)
尝试将该行更改为GenericMessage theMsg;
`
异常的真正来源
在GenericMessage
默认构造函数中,可以使用NULL
初始化数据
。但是,不允许使用NULL
指针初始化std::string
。不要在默认构造函数中初始化数据
成员
GenericMessage()
: beId(-1)
{}
只要您的类型T
具有默认构造函数,编译器将在生成模板时处理其初始化
(希望)有用的提示#1
zmq::message\u t
中的数据缓冲区(通常)不是以NULL结尾的。收到消息后,请注意如何将缓冲区转换为字符串
// snip
zmq::message_t reply;
socket.recv (&reply);
const char *buf = static_cast<const char*>(reply.data());
std::cout << "CHAR [" << buf << "]" << std::endl;
//std::string input_data_(buf); // assumes a null-term string
std::string input_data_( buf, reply.size() );
// snip
//snip
zmq::消息回复;
socket.rec
GenericMessage()
: beId(-1)
{}
// snip
zmq::message_t reply;
socket.recv (&reply);
const char *buf = static_cast<const char*>(reply.data());
std::cout << "CHAR [" << buf << "]" << std::endl;
//std::string input_data_(buf); // assumes a null-term string
std::string input_data_( buf, reply.size() );
// snip
// snip
std::string outbound_data_ = archive_stream.str();
const char * buf = outbound_data_.c_str();
int len = strlen((const char*)buf);
std::cout << "LENGTH [" << len << "]" << std::endl;
zmq::message_t msgToSend(len);
memcpy ((char *) msgToSend.data(), buf, len);
if(memcmp((char *) msgToSend.data(), buf, len) != 0)
{
std::cout << "memcpy error!" << std::endl;
}
// snip
std::string outbound_data_ = archive_stream.str();
// no need to use the c-style string function 'strlen'
int len = outbound_data_.length();
std::cout << "LENGTH [" << len << "]" << std::endl;
zmq::message_t msgToSend(len);
memcpy( msgToSend.data(), outbound_data_.data(), len );