|
这是因为应用程序内部的运行库代码捕捉并处理了这个异常，没有执行到崩溃和JIT调试那一阶段。
如果是带有窗口的MFC程序，那么MFC库的默认窗口函数中有一个TRY{}CATCH()，用户代码没有处理的异常会被这个CATCH捕捉到，参考MFC源代码的WINCORE.CPP中的AfxCallWndProc函数：
LRESULT AFXAPI AfxCallWndProc(CWnd* pWnd, HWND hWnd, UINT nMsg,
WPARAM wParam = 0, LPARAM lParam = 0)
{
...
TRY
{
#ifndef _AFX_NO_OCC_SUPPORT
// special case for WM_DESTROY
if ((nMsg == WM_DESTROY) && (pWnd->m_pCtrlCont != NULL))
pWnd->m_pCtrlCont->OnUIActivate(NULL);
#endif
// special case for WM_INITDIALOG
CRect rectOld;
DWORD dwStyle = 0;
if (nMsg == WM_INITDIALOG)
_AfxPreInitDialog(pWnd, &rectOld, &dwStyle);
// delegate to object's WindowProc
lResult = pWnd->WindowProc(nMsg, wParam, lParam);
// more special case for WM_INITDIALOG
if (nMsg == WM_INITDIALOG)
_AfxPostInitDialog(pWnd, rectOld, dwStyle);
}
CATCH_ALL(e)
{
lResult = AfxGetThread()->ProcessWndProcException(e, &pThreadState->m_lastSentMsg);
TRACE1("Warning: Uncaught exception in WindowProc (returning %ld).\n",
lResult);
DELETE_EXCEPTION(e);
}
END_CATCH_ALL
|