debug assertion failed during mfc regular dll startup

[houtao]

I'm working on a project that's using an mfc regular dll from a Qt gui project(yes, you don't see wrong), the mfc dll code is extracted from some other projects build entirely in mfc. I build all the mfc code with a regular dll and run it, and it came to the debug assertion during the initialization at the code:

ASSERT(AfxGetModuleState() != AfxGetAppModuleState());

and

VERIFY(AfxSetModuleState(AfxGetThreadState()->m_pPrevModuleState) == &afxModuleState);

furthermore, when i ignore and continue running the programme, a debug assertion failed at the code:

ASSERT(afxCurrentResourceHandle != NULL,

of course the resource handle is null.

I track down the source code, and it seems that during the initialization, the 'dllmain'(in fact there is a lot of 'dllmains') in my dll has been invoked twice and only the seconde time the assert has been emitted, the first time it has been running ok. and I notice that the members in the global variable afxModuleState has all been null thus cause the assertion after the initialization, and what's more I notice that during the first time initialization, the afxModuleState has been assigned right.

I wonder what's the cause of my problem and how to solve it. And I'm willing to hear your advice.

an additional information is that, in my regular dll, I use boost library(which I'm not too familiar with)

[houtao]

ps.

the visual studio version i use is 2005

[houtao]

the fisrst time initialization call stack:

mfc80d.dll!AfxWinInit(HINSTANCE__ * hInstance=0x781d0000, HINSTANCE__ * hPrevInstance=0x00000000, char * lpCmdLine=0x781d2aac, int nCmdShow=0) 行30 C++
mfc80d.dll!DllMain(HINSTANCE__ * hInstance=0x781d0000, unsigned long dwReason=1, void * __formal=0x0012fd24) 行504 C++
mfc80d.dll!__DllMainCRTStartup(void * hDllHandle=0x781d0000, unsigned long dwReason=1, void * lpreserved=0x0012fd24) 行495 + 0x11 字节 C
mfc80d.dll!_DllMainCRTStartup(void * hDllHandle=0x781d0000, unsigned long dwReason=1, void * lpreserved=0x0012fd24) 行459 + 0x11 字节 C

the second time initialization call stack:

GemsDLL.dll!InternalDllMain(HINSTANCE__ * hInstance=0x00710000, unsigned long dwReason=1, void * __formal=0x0012fd24) 行100 C++
GemsDLL.dll!DllMain(HINSTANCE__ * hInstance=0x00710000, unsigned long dwReason=1, void * lpReserved=0x0012fd24) 行283 C++
GemsDLL.dll!__DllMainCRTStartup(void * hDllHandle=0x00710000, unsigned long dwReason=1, void * lpreserved=0x0012fd24) 行495 + 0x11 字节 C
GemsDLL.dll!_DllMainCRTStartup(void * hDllHandle=0x00710000, unsigned long dwReason=1, void * lpreserved=0x0012fd24) 行459 + 0x11 字节 C

the call stack when the assert 'ASSERT(AfxGetModuleState() != AfxGetAppModuleState())' occurs:

mfc80d.dll!AfxGetModuleState() 行422 C++
mfc80d.dll!AfxCoreInitModule() 行575 + 0x5 字节 C++
GemsDLL.dll!InternalDllMain(HINSTANCE__ * hInstance=0x00710000, unsigned long dwReason=1, void * __formal=0x0012fd24) 行107 C++
GemsDLL.dll!DllMain(HINSTANCE__ * hInstance=0x00710000, unsigned long dwReason=1, void * lpReserved=0x0012fd24) 行283 C++
GemsDLL.dll!__DllMainCRTStartup(void * hDllHandle=0x00710000, unsigned long dwReason=1, void * lpreserved=0x0012fd24) 行495 + 0x11 字节 C
GemsDLL.dll!_DllMainCRTStartup(void * hDllHandle=0x00710000, unsigned long dwReason=1, void * lpreserved=0x0012fd24) 行459 + 0x11 字节 C

in code

AFX_MODULE_STATE* AFXAPI AfxGetModuleState()
{
_AFX_THREAD_STATE* pState = _afxThreadState;
ENSURE(pState);
AFX_MODULE_STATE* pResult;
if (pState->m_pModuleState != NULL)
{
// thread state's module state serves as override
pResult = pState->m_pModuleState;
}
else
{
// otherwise, use global app state
pResult = _afxBaseModuleState.GetData();
}
ENSURE(pResult != NULL);
return pResult;
}

the pState is different from the first time initialization(the first time is not my mfc dll?), and all its value is null

- pState 0x001b44c8 {m_pModuleState=0x00000000 m_pPrevModuleState=0x00000000 m_pSafetyPoolBuffer=0x00000000 ...} _AFX_THREAD_STATE *
+ CNoTrackObject {...} CNoTrackObject
- m_pModuleState 0x00000000 {m_pCurrentWinApp=??? m_hCurrentInstanceHandle=??? m_hCurrentResourceHandle=??? ...} AFX_MODULE_STATE *
+ CNoTrackObject {...} CNoTrackObject
m_pCurrentWinApp CXX0030: 错误: 无法计算表达式的值
m_hCurrentInstanceHandle CXX0030: 错误: 无法计算表达式的值
m_hCurrentResourceHandle CXX0030: 错误: 无法计算表达式的值
m_lpszCurrentAppName CXX0030: 错误: 无法计算表达式的值
m_bDLL CXX0030: 错误: 无法计算表达式的值
m_bSystem CXX0030: 错误: 无法计算表达式的值
+ m_bReserved 0x00000016 <错误的指针> unsigned char [2]
m_fRegisteredClasses CXX0030: 错误: 无法计算表达式的值

[Marc G]

You might have to take a look at AFX_MANAGE_STATE.

[vanvid]

You might have to take a look at AFX_MANAGE_STATE.

Sorry for bringing up an old topic but I have this problem as well and I don't understand it, even after reading the site referred to.

My situation is I have a DLL that works fine initially. Then I begin using a 3rd party lib file statically linked into my dll. As long as I don't reference anything in the library my code still compiles, links and runs without any problem. But as soon as I include a single line using the library I get the crash on startup as well. My callstack is this:

> mfc90d.dll!AfxCoreInitModule() Line 587 + 0x23 bytes C++
ControlClient.dll!InternalDllMain(HINSTANCE__ * hInstance=0x06e20000, unsigned long dwReason=1, void * __formal=0x00000000) Line 88 C++
ControlClient.dll!DllMain(HINSTANCE__ * hInstance=0x06e20000, unsigned long dwReason=1, void * lpReserved=0x00000000) Line 272 C++
ControlClient.dll!__DllMainCRTStartup(void * hDllHandle=0x06e20000, unsigned long dwReason=1, void * lpreserved=0x00000000) Line 546 + 0x11 bytes C
ControlClient.dll!_DllMainCRTStartup(void * hDllHandle=0x06e20000, unsigned long dwReason=1, void * lpreserved=0x00000000) Line 510 + 0x11 bytes C
ntdll.dll!77a49950()

(and so on into other system libraries)

So the crash is on startup before I ever get a chance to use the AFX_MANAGE_STATE(AfxGetStaticModuleState()) macro.

Can someone explain this in more detail? Because I don't understand it from the MSDN explanation (which as far as I can see doesn't offer any explanation on exactly when you need to do this).

Thanks in advance.