[4.0.4] Assertion failed: Successful WSASTARTUP not yet performed (..\..\..\src\signaler.cpp:134)

[10-5]

Win32, VS2010.

If a global zmq::context_t instance is defined in a dll, this assertion will fail when exiting:

Assertion failed: Successful WSASTARTUP not yet performed (..\..\..\src\signaler.cpp: 134)

call stack:

libzmq-v100-mt-gd-4_0_4.dll!zmq::zmq_abort(const char * errmsg_)  line 71 + 0x15 bytes  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::signaler_t::send()  line 134 + 0x55 bytes  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::mailbox_t::send(const zmq::command_t & cmd_)  line 56  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::ctx_t::send_command(unsigned int tid_, const zmq::command_t & command_)  line 327  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::object_t::send_stop()  line 183    C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::socket_base_t::stop()  line 162    C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::ctx_t::terminate()  line 134 + 0x16 bytes  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq_ctx_term(void * ctx_)  line 171 + 0x8 bytes C++
libzmq-v100-mt-gd-4_0_4.dll!zmq_ctx_destroy(void * ctx_)  line 241 + 0x9 bytes  C++
ZeroMQ.dll!zmq::context_t::close()  line 304 + 0xe bytes    C++
ZeroMQ.dll!zmq::context_t::~context_t()  line 298   C++
ZeroMQ.dll!ZeroMQ::`dynamic atexit destructor for 'g_Context''()  + 0x28 bytes  C++
ZeroMQ.dll!_CRT_INIT(void * hDllHandle, unsigned long dwReason, void * lpreserved)  line 415    C
ZeroMQ.dll!__DllMainCRTStartup(void * hDllHandle, unsigned long dwReason, void * lpreserved)  line 526 + 0x11 bytes C
ZeroMQ.dll!_DllMainCRTStartup(void * hDllHandle, unsigned long dwReason, void * lpreserved)  line 476 + 0x11 bytes  C

Sometimes another assertion fails:

Assertion failed: Successful WSASTARTUP not yet performed (..\..\..\src\signaler.cpp: 209)

call stack:

libzmq-v100-mt-gd-4_0_4.dll!zmq::zmq_abort(const char * errmsg_)  line 71 + 0x15 bytes  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::signaler_t::wait(int timeout_)  line 209 + 0x64 bytes  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::mailbox_t::recv(zmq::command_t * cmd_, int timeout_)  line 72 + 0xf bytes  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq::ctx_t::terminate()  line 142 + 0x11 bytes  C++
libzmq-v100-mt-gd-4_0_4.dll!zmq_ctx_term(void * ctx_)  line 171 + 0x8 bytes C++
libzmq-v100-mt-gd-4_0_4.dll!zmq_ctx_destroy(void * ctx_)  line 241 + 0x9 bytes  C++
ZeroMQ.dll!zmq::context_t::close()  line 304 + 0xe bytes    C++
ZeroMQ.dll!zmq::context_t::~context_t()  line 298   C++
ZeroMQ.dll!ZeroMQ::`dynamic atexit destructor for 'g_Context''()  + 0x28 bytes  C++
ZeroMQ.dll!_CRT_INIT(void * hDllHandle, unsigned long dwReason, void * lpreserved)  line 415    C
ZeroMQ.dll!__DllMainCRTStartup(void * hDllHandle, unsigned long dwReason, void * lpreserved)  line 526 + 0x11 bytes C
ZeroMQ.dll!_DllMainCRTStartup(void * hDllHandle, unsigned long dwReason, void * lpreserved)  line 476 + 0x11 bytes  C

If the global zmq::context_t instance is defined in the exe, everything is fine.

[sc703bupt]

Hi @nexcvon, actually i encounter the same problem as you, but i don't understand what do you mean by defining an instance in dll and in exe. Could you please kindly help me on this? Thank you very much.
My env: vs2008+zmq4.0.4+xp sp3 32bit

[jruffin]

I have the exact same issue, and much like @nexcvon says, it only happens when I build a DLL that uses ZeroMQ and load it in some EXE. In this case, the DLL instantiates and destroys its own ZMQ context and will crash in the exact same way when exiting. Whenever I use ZeroMQ directly in an EXE and instantiate the ZMQ context in the EXE, I have no such issue. IIRC making my DLL into a static library solves it.

[10-5]

@sc703bupt,

If defining a global zmq::context_t object a in a DLL, and a global zmq::context_t object b in a EXE, Here are some events ordered by time:

load EXE Image
load DLL image
a.context_t::context_t
DllMain(LOAD)
b.context_t::context_t
main
b.context_t::~context_t
DllMain(UNLOAD)
a.context_t::~context_t  <= Assertion failed: Successful WSASTARTUP not yet ...
unload DLL image
unload EXE image

[sc703bupt]

@nexcvon, thank you for explanation. So how can i define it in exe? Is it right to compile the zeromq src with my proj src rather than use .h files and dll?

[10-5]

@sc703bupt, you can define the zmq::context_t object in your main function of the EXE, pass its pointer to the DLL, and use the pointer in the DLL.
Its OK to use .h files and DLL.

[xudonglei]

you have solved the problem? @nexcvon