I am trying to port a 32-bit application to 64-bit. It looks like the calculations are working correctly, but I can’t set the views correctly. I use MFC, C ++ and OpenGL, the Intel compiler 10.0.027 inside VS2005 on a W7 x64 machine.
When the failure occurs, I get the following message: "First chance exception in 0xffffffff8043b1b6 in the 3DApp.exe file: 0xC0000005: access violation in place 0xffffffffff8043b1b6", and this is the stack trace:
ffffffff8043b1b6()
user32.dll!UserCallWinProcCheckWow() + 0x11d bytes
user32.dll!DispatchMessageWorker() + 0x12a bytes
3DApp.exe!AfxInternalPumpMessage() Line 183 C++
3DApp.exe!CWinThread::PumpMessage() Line 896 C++
3DApp.exe!CWinThread::Run() Line 625 + 0x13 bytes C++
NOTE PLEASE why UserCallWinProcCheckWow is called, I thought the Wow suffix is only for emulating 32-bit applications on a 64-bit computer.
Obviously, somewhere the 64-bit pointer is being treated as a 32-bit pointer, but I cannot specify where this happens. I downloaded debugging symbols from microsoft that show the top of the call stack.
Any help is greatly appreciated. Leon
EDIT
Call DispatchMessage code:
if (pState->m_msgCur.message != WM_KICKIDLE && !AfxPreTranslateMessage(&(pState->m_msgCur)))
{
::TranslateMessage(&(pState->m_msgCur));
::DispatchMessage(&(pState->m_msgCur));
}
At this point, pState pointers are mapped to 64 bits.
Status pState-> m_msgCu:
- pState-> m_msgCur {msg = 0x00000022 wp = 0x0000000000000000 lp = 0x0000000000000000} tagMSG
- hwnd 0x0000000000020416 {unused = 0x00000000} HWND__ * message 0x00000022 unsigned int wParam 0x0000000000000000 unsigned __int64 lParam 0x0000000000000000 __int64 unsigned 0x000f3967
- pt {x = 0x0000030f y = 0x00000356} tagPOINT
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