X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/028e7716ef44f926c5fc04c2e484ef86bb8760ed..9f01395e41a6e4c7360e9bdc5b6232238cbf95c2:/src/msw/main.cpp diff --git a/src/msw/main.cpp b/src/msw/main.cpp index 5251f1f34d..35f1ada5fc 100644 --- a/src/msw/main.cpp +++ b/src/msw/main.cpp @@ -17,10 +17,6 @@ // headers // ---------------------------------------------------------------------------- -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) - #pragma implementation -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -34,22 +30,303 @@ #include "wx/msw/private.h" +#if wxUSE_ON_FATAL_EXCEPTION + #include "wx/datetime.h" + #include "wx/msw/crashrpt.h" + + #ifdef __VISUALC__ + #include + #endif // __VISUALC__ +#endif // wxUSE_ON_FATAL_EXCEPTION + +#ifdef __WXWINCE__ + // there is no ExitProcess() under CE but exiting the main thread has the + // same effect + #ifndef ExitProcess + #define ExitProcess ExitThread + #endif +#endif // __WXWINCE__ + #ifdef __BORLANDC__ // BC++ has to be special: its run-time expects the DLL entry point to be // named DllEntryPoint instead of the (more) standard DllMain #define DllMain DllEntryPoint -#endif +#endif // __BORLANDC__ #if defined(__WXMICROWIN__) #define HINSTANCE HANDLE #endif -#if wxUSE_GUI +// defined in common/init.cpp +extern int wxEntryReal(int& argc, wxChar **argv); // ============================================================================ // implementation: various entry points // ============================================================================ +#if wxUSE_BASE + +#if wxUSE_ON_FATAL_EXCEPTION && defined(__VISUALC__) && !defined(__WXWINCE__) + // VC++ (at least from 4.0 up to version 7.1) is incredibly broken in that + // a "catch ( ... )" will *always* catch SEH exceptions in it even though + // it should have never been the case... to prevent such catches from + // stealing the exceptions from our wxGlobalSEHandler which is only called + // if the exception is not handled elsewhere, we have to also call it from + // a special SEH translator function which is called by VC CRT when a Win32 + // exception occurs + + // this warns that /EHa (async exceptions) should be used when using + // _set_se_translator but, in fact, this doesn't seem to change anything + // with VC++ up to 7.1 -- to be confirmed with VC++ 8 + #if _MSC_VER <= 1310 + #pragma warning(disable:4535) + #endif + + // note that the SE translator must be called wxSETranslator! + #define DisableAutomaticSETranslator() _set_se_translator(wxSETranslator) +#else // !__VISUALC__ + #define DisableAutomaticSETranslator() +#endif // __VISUALC__/!__VISUALC__ + +// ---------------------------------------------------------------------------- +// wrapper wxEntry catching all Win32 exceptions occurring in a wx program +// ---------------------------------------------------------------------------- + +// wrap real wxEntry in a try-except block to be able to call +// OnFatalException() if necessary +#if wxUSE_ON_FATAL_EXCEPTION + +// global pointer to exception information, only valid inside OnFatalException, +// used by wxStackWalker and wxCrashReport +extern EXCEPTION_POINTERS *wxGlobalSEInformation = NULL; + +// flag telling us whether the application wants to handle exceptions at all +static bool gs_handleExceptions = false; + +static void wxFatalExit() +{ + // use the same exit code as abort() + ::ExitProcess(3); +} + +unsigned long wxGlobalSEHandler(EXCEPTION_POINTERS *pExcPtrs) +{ + if ( gs_handleExceptions && wxTheApp ) + { + // store the pointer to exception info + wxGlobalSEInformation = pExcPtrs; + + // give the user a chance to do something special about this + __try + { + wxTheApp->OnFatalException(); + } + __except ( EXCEPTION_EXECUTE_HANDLER ) + { + // nothing to do here, just ignore the exception inside the + // exception handler + ; + } + + wxGlobalSEInformation = NULL; + + // this will execute our handler and terminate the process + return EXCEPTION_EXECUTE_HANDLER; + } + + return EXCEPTION_CONTINUE_SEARCH; +} + +#ifdef __VISUALC__ + +static void wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS *ep) +{ + switch ( wxGlobalSEHandler(ep) ) + { + default: + wxFAIL_MSG( _T("unexpected wxGlobalSEHandler() return value") ); + // fall through + + case EXCEPTION_EXECUTE_HANDLER: + // if wxApp::OnFatalException() had been called we should exit the + // application -- but we shouldn't kill our host when we're a DLL +#ifndef WXMAKINGDLL + wxFatalExit(); +#endif // not a DLL + break; + + case EXCEPTION_CONTINUE_SEARCH: + // we're called for each "catch ( ... )" and if we (re)throw from + // here, the catch handler body is not executed, so the effect is + // as if had inhibited translation of SE to C++ ones because the + // handler will never see any structured exceptions + throw; + } +} + +#endif // __VISUALC__ + +bool wxHandleFatalExceptions(bool doit) +{ + // assume this can only be called from the main thread + gs_handleExceptions = doit; + +#if wxUSE_CRASHREPORT + if ( doit ) + { + // try to find a place where we can put out report file later + wxChar fullname[MAX_PATH]; + if ( !::GetTempPath(WXSIZEOF(fullname), fullname) ) + { + wxLogLastError(_T("GetTempPath")); + + // when all else fails... + wxStrcpy(fullname, _T("c:\\")); + } + + // use PID and date to make the report file name more unique + wxString name = wxString::Format + ( + _T("%s_%s_%lu.dmp"), + wxTheApp ? wxTheApp->GetAppName().c_str() + : _T("wxwindows"), + wxDateTime::Now().Format(_T("%Y%m%dT%H%M%S")).c_str(), + ::GetCurrentProcessId() + ); + + wxStrncat(fullname, name, WXSIZEOF(fullname) - wxStrlen(fullname) - 1); + + wxCrashReport::SetFileName(fullname); + } +#endif // wxUSE_CRASHREPORT + + return true; +} + +int wxEntry(int& argc, wxChar **argv) +{ + DisableAutomaticSETranslator(); + + __try + { + return wxEntryReal(argc, argv); + } + __except ( wxGlobalSEHandler(GetExceptionInformation()) ) + { + wxFatalExit(); + +#if !defined(_MSC_VER) || defined(__WXDEBUG__) || (defined(_MSC_VER) && _MSC_VER <= 1200) + // this code is unreachable but put it here to suppress warnings in some compilers + // and disable for others to supress warnings too + return -1; +#endif // !__VISUALC__ in release build + } +} + +#else // !wxUSE_ON_FATAL_EXCEPTION + +#if defined(__VISUALC__) && !defined(__WXWINCE__) + +static void +wxSETranslator(unsigned int WXUNUSED(code), EXCEPTION_POINTERS * WXUNUSED(ep)) +{ + // see wxSETranslator() version for wxUSE_ON_FATAL_EXCEPTION above + throw; +} + +#endif // __VISUALC__ + +int wxEntry(int& argc, wxChar **argv) +{ + DisableAutomaticSETranslator(); + + return wxEntryReal(argc, argv); +} + +#endif // wxUSE_ON_FATAL_EXCEPTION/!wxUSE_ON_FATAL_EXCEPTION + +#endif // wxUSE_BASE + +#if wxUSE_GUI && defined(__WXMSW__) + +#if wxUSE_UNICODE && !defined(__WXWINCE__) + #define NEED_UNICODE_CHECK +#endif + +#ifdef NEED_UNICODE_CHECK + +// check whether Unicode is available +static bool wxIsUnicodeAvailable() +{ + static const wchar_t *ERROR_STRING = L"wxWidgets Fatal Error"; + + if ( wxGetOsVersion() != wxWINDOWS_NT ) + { + // we need to be built with MSLU support +#if !wxUSE_UNICODE_MSLU + // note that we can use MessageBoxW() as it's implemented even under + // Win9x - OTOH, we can't use wxGetTranslation() because the file APIs + // used by wxLocale are not + ::MessageBox + ( + NULL, + L"This program uses Unicode and requires Windows NT/2000/XP.\n" + L"\n" + L"Program aborted.", + ERROR_STRING, + MB_ICONERROR | MB_OK + ); + + return false; +#else // wxUSE_UNICODE_MSLU + // and the MSLU DLL must also be available + HMODULE hmod = ::LoadLibraryA("unicows.dll"); + if ( !hmod ) + { + ::MessageBox + ( + NULL, + L"This program uses Unicode and requires unicows.dll to work " + L"under current operating system.\n" + L"\n" + L"Please install unicows.dll and relaunch the program.", + ERROR_STRING, + MB_ICONERROR | MB_OK + ); + return false; + } + + // this is not really necessary but be tidy + ::FreeLibrary(hmod); + + // finally do the last check: has unicows.lib initialized correctly? + hmod = ::LoadLibraryW(L"unicows.dll"); + if ( !hmod ) + { + ::MessageBox + ( + NULL, + L"This program uses Unicode but is not using unicows.dll\n" + L"correctly and so cannot work under current operating system.\n" + L"Please contact the program author for an updated version.\n" + L"\n" + L"Program aborted.", + ERROR_STRING, + MB_ICONERROR | MB_OK + ); + + return false; + } + + ::FreeLibrary(hmod); +#endif // !wxUSE_UNICODE_MSLU + } + + return true; +} + +#endif // NEED_UNICODE_CHECK + // ---------------------------------------------------------------------------- // Windows-specific wxEntry // ---------------------------------------------------------------------------- @@ -59,6 +336,15 @@ WXDLLEXPORT int wxEntry(HINSTANCE hInstance, wxCmdLineArgType WXUNUSED(pCmdLine), int nCmdShow) { + // the first thing to do is to check if we're trying to run an Unicode + // program under Win9x w/o MSLU emulation layer - if so, abort right now + // as it has no chance to work and has all chances to crash +#ifdef NEED_UNICODE_CHECK + if ( !wxIsUnicodeAvailable() ) + return -1; +#endif // NEED_UNICODE_CHECK + + // remember the parameters Windows gave us wxSetInstance(hInstance); wxApp::m_nCmdShow = nCmdShow; @@ -96,56 +382,7 @@ WXDLLEXPORT int wxEntry(HINSTANCE hInstance, return wxEntry(argc, argv); } -// May wish not to have a DllMain or WinMain, e.g. if we're programming -// a Netscape plugin or if we're writing a console application -#if !defined(NOMAIN) - -extern "C" -{ - -// ---------------------------------------------------------------------------- -// WinMain -// ---------------------------------------------------------------------------- - -// Note that WinMain is also defined in dummy.obj, which is linked to -// an application that is using the DLL version of wxWidgets. - -#if defined(_WINDLL) - -// DLL entry point - -BOOL WINAPI -DllMain(HANDLE hModule, DWORD fdwReason, LPVOID WXUNUSED(lpReserved)) -{ - // Only call wxEntry if the application itself is part of the DLL. - // If only the wxWidgets library is in the DLL, then the - // initialisation will be called when the application implicitly - // calls WinMain. -#ifndef WXMAKINGDLL - switch (fdwReason) - { - case DLL_PROCESS_ATTACH: - return wxEntry(hModule); - - case DLL_PROCESS_DETACH: - wxEntryCleanup(); - break; - } -#else - (void)hModule; - (void)fdwReason; -#endif // !WXMAKINGDLL - - return TRUE; -} - -#endif // _WINDLL - -} // extern "C" - -#endif // !NOMAIN - -#endif // wxUSE_GUI +#endif // wxUSE_GUI && __WXMSW__ // ---------------------------------------------------------------------------- // global HINSTANCE