/*** *crtlib.c - CRT DLL initialization and termination routine (Win32, Dosx32) * * Copyright (c) 1991-2001, Microsoft Corporation. All rights reserved. * *Purpose: * This module contains initialization entry point for the CRT DLL * in the Win32 environment. It also contains some of the supporting * initialization and termination code. * *Revision History: * 08-12-91 GJF Module created. Sort of. * 01-17-92 GJF Return exception code value for RTEs corresponding * to exceptions. * 01-29-92 GJF Support for wildcard expansion in filenames on the * command line. * 02-14-92 GJF Moved file inheritance stuff to ioinit.c. Call to * inherit() is replace by call to _ioinit(). * 08-26-92 SKS Add _osver, _winver, _winmajor, _winminor * 09-04-92 GJF Replaced _CALLTYPE3 with WINAPI. * 09-30-92 SRW Call _heap_init before _mtinit * 10-19-92 SKS Add "dowildcard" parameter to GetMainArgs() * Prepend a second "_" to name since it is internal-only * 03-20-93 SKS Remove obsolete variables _osmode, _cpumode, etc. * 04-06-93 SKS Replace _CRTAPI* with _cdecl * 04-07-93 SKS Add _CRTIMP keyword for CRT DLL model * Change __GetMainArgs to __getmainargs * 04-13-93 SKS Change call to _mtdeletelocks to new routine _mtterm * 04-26-93 SKS Change _CRTDLL_INIT to fail loading on failure to * initialize/clean up, rather than calling _amsg_exit(). * 04-27-93 GJF Removed support for _RT_STACK, _RT_INTDIV, * _RT_INVALDISP and _RT_NONCONT. * 05-06-93 SKS Add call to _heap_term to free up all allocated memory * *and* address space. This must be the last thing done. * 06-03-93 GJF Added __proc_attached flag. * 06-07-93 GJF Incorporated SteveWo's code to call LoadLibrary, from * crtdll.c. * 11-05-93 CFW Undefine GetEnviromentStrings. * 11-09-93 GJF Added call to __initmbctable (must happen before * environment strings are processed). * 11-09-93 GJF Merged with NT SDK version (primarily the change of * 06-07-93 noted above). Also, replace MTHREAD with * _MT. * 11-23-93 CFW GetEnviromentStrings undef moved to internal.h. * 11-23-93 CFW Wide char enable. * 11-29-93 CFW Wide environment. * 12-02-93 CFW Remove WPRFLAG dependencies since only one version. * 12-13-93 SKS Free up per-thread CRT data on DLL_THREAD_DETACH * with a call to _freeptd() in _CRT_INIT() * 01-11-94 GJF Use __GetMainArgs name when building libs for NT SDK. * 02-07-94 CFW POSIXify. * 03-04-94 SKS Add _newmode parameter to _*getmainargs (except NTSDK) * 03-31-94 CFW Use __crtGetEnvironmentStrings. * 04-08-93 CFW Move __crtXXX calls past initialization. * 04-28-94 GJF Major changes for Win32S support! Added * AllocPerProcessDataStuct() to allocate and initialize * the per-process data structure needed in the Win32s * version of msvcrt*.dll. Also, added a function to * free and access functions for all read-write global * variables which might be used by a Win32s app. * 05-04-94 GJF Made access functions conditional on _M_IX86, added * some comments to function headers, and fixed a * possible bug in AllocPerProcessDataStruct (the return * value for success was NOT explicitly set to something * nonzero). * 05-10-94 GJF Added version check so that Win32 version (Win32s) * will not load on Win32s (resp., Win32). * 09-06-94 CFW Remove _INTL switch. * 09-06-94 CFW Remove _MBCS_OS switch. * 09-06-94 GJF Added __error_mode and __app_type. * 09-15-94 SKS Clean up comments to avoid source release problems * 09-21-94 SKS Fix typo: no leading _ on "DLL_FOR_WIN32S" * 10-04-94 CFW Removed #ifdef _KANJI * 10-04-94 BWT Fix _NTSDK build * 11-22-94 CFW Must create wide environment if none. * 12-19-94 GJF Changed "MSVCRT20" to "MSVCRT30". Also, put testing for * Win32S under #ifdef _M_IX86. Both changes from Richard * Shupak. * 01-16-95 CFW Set default debug output for console. * 02-13-95 GJF Added initialization for the new _ppd_tzstd and * _ppd_tzdst fields, thereby fixing the definition of * _ppd__tzname. * 02-15-95 CFW Make all CRT message boxes look alike. * 02-24-95 CFW Use __crtMessageBoxA. * 02-27-95 CFW Change __crtMessageBoxA params. * 03-08-95 GJF Added initialization for _ppd__nstream. Removed * _ppd_lastiob. * 02-24-95 CFW Call _CrtDumpMemoryLeaks. * 04-06-95 CFW Use __crtGetEnvironmentStringsA. * 04-17-95 SKS Free TLS index ppdindex when it is no longer needed * 04-26-95 GJF Added support for winheap in DLL_FOR_WIN32S build. * 05-02-95 GJF No _ppd__heap_maxregsize, _ppd__heap_regionsize or * _ppd__heap_resetsize for WINHEAP. * 05-24-95 CFW Official ANSI C++ new handler added. * 06-13-95 CFW De-install client dump hook as client EXE/DLL is gone. * 06-14-95 GJF Changes for new lowio scheme (__pioinof[]) - no more * per-process data initialization needed (Win32s) and * added a call to _ioterm(). * 07-04-95 GJF Interface to __crtGetEnvironmentStrings and _setenvp * changes slightly. * 06-27-95 CFW Add win32s support for debug libs. * 07-03-95 CFW Changed offset of _lc_handle[LC_CTYPE], added sanity * check to crtlib.c to catch changes to win32s.h that * modify offset. * 07-07-95 CFW Simplify default report mode scheme. * 07-25-95 CFW Add win32s support for user visible debug heap vars. * 08-21-95 SKS (_ppd_)_CrtDbgMode needs to be initialized for Win32s * 08-31-95 GJF Added _dstbias. * 11-09-95 GJF Changed "ISTNT" to "IsTNT". * 03-18-96 SKS Add _fileinfo to variables implemented as functions. * 04-22-96 GJF Check for failure of heap initialization. * 05-14-96 GJF Changed where __proc_attached is set so that it * denotes successful completion of initialization. * 06-11-96 JWM Changed string "MSVCRT40" to "MSVCRT" in _CRTDLL_INIT(). * 06-27-96 GJF Purged Win32s support. Note, the access functions must * be retained for backwards compatibility. * 06-28-96 SKS Remove obsolete local variable "hmod". * 03-17-97 RDK Add reference to _mbcasemap. * 07-24-97 GJF heap_init changed slightly to support option to use * heap running directly on Win32 API. * 08-08-97 GJF Rearranged #ifdef-s so ptd is only defined when it is * used (under ANSI_NEW_HANDLER). * 10-02-98 GJF Use GetVersionEx instead of GetVersion and store OS ID * in _osplatform. * 04-30-99 GJF Don't clean up system resources if the whole process * if terminating. * 09-02-99 PML Put Win32s check in system CRT only. * 02-02-00 GB Added ATTACH_THREAD support for _CRT_INIT where we * initialise per thread data so that in case where we * are short of memory, we don't have to kill the whole * process for inavailablity of space. * 08-22-00 GB Fixed potentia leak of ptd in CRT_INIT * 09-06-00 GB Changed the function definations of _pctype and * _pwctype to const * 03-16-01 PML _alloca the OSVERSIONINFO so /GS can work (vs7#224261) * 03-19-01 BWT Add test to preclude msvcrt.dll loading on anything other * than the OS it ships with. * 03-26-01 PML Use GetVersionExA, not GetVersionEx (vs7#230286) * 03-27-01 PML Fail DLL load instead of calling _amsg_exit, and * propogate error on EXE arg parsing up (vs7#231220). * 03-28-01 PML Protect against GetModuleFileName overflow (vs7#231284) * 04-05-01 PML Clean up on DLL unload due to FreeLibrary, or on * termination by ExitProcess instead of exit (vs7#235781) * 04-30-01 BWT Remove _NTSDK and just return false if the OS doesn't match * *******************************************************************************/ #if defined(CRTDLL) #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef _SYSCRT #include #endif /* * flag set iff _CRTDLL_INIT was called with DLL_PROCESS_ATTACH */ static int proc_attached = 0; /* * command line, environment, and a few other globals */ wchar_t *_wcmdln = NULL; /* points to wide command line */ char *_acmdln = NULL; /* points to command line */ char *_aenvptr = NULL; /* points to environment block */ #ifndef _POSIX_ wchar_t *_wenvptr = NULL; /* points to wide environment block */ #endif /* _POSIX_ */ void (__cdecl * _aexit_rtn)(int) = _exit; /* RT message return procedure */ extern int _newmode; /* declared in */ int __error_mode = _OUT_TO_DEFAULT; int __app_type = _UNKNOWN_APP; static void __cdecl inherit(void); /* local function */ /*** *int __[w]getmainargs - get values for args to main() * *Purpose: * This function invokes the command line parsing and copies the args * to main back through the passsed pointers. The reason for doing * this here, rather than having _CRTDLL_INIT do the work and exporting * the __argc and __argv, is to support the linked-in option to have * wildcard characters in filename arguments expanded. * *Entry: * int *pargc - pointer to argc * _TCHAR ***pargv - pointer to argv * _TCHAR ***penvp - pointer to envp * int dowildcard - flag (true means expand wildcards in cmd line) * _startupinfo * startinfo- other info to be passed to CRT DLL * *Exit: * Returns 0 on success, negative if _*setargv returns an error. Values * for the arguments to main() are copied through the passed pointers. * *******************************************************************************/ #if !defined(_POSIX_) _CRTIMP int __cdecl __wgetmainargs ( int *pargc, wchar_t ***pargv, wchar_t ***penvp, int dowildcard, _startupinfo * startinfo) { int ret; #ifdef ANSI_NEW_HANDLER #ifdef _MT /* set per-thread new handler for main thread */ _ptiddata ptd = _getptd(); ptd->_newh = startinfo->newh; #endif /* set global default per-thread new handler */ _defnewh = startinfo->newh; #endif /* ANSI_NEW_HANDLER */ /* set global new mode flag */ _newmode = startinfo->newmode; if ( dowildcard ) ret = __wsetargv(); /* do wildcard expansion after parsing args */ else ret = _wsetargv(); /* NO wildcard expansion; just parse args */ if (ret < 0) return ret; *pargc = __argc; *pargv = __wargv; /* * if wide environment does not already exist, * create it from multibyte environment */ if (!_wenviron) __mbtow_environ(); *penvp = _wenviron; return ret; } #endif /* !defined(_POSIX_) */ _CRTIMP int __cdecl __getmainargs ( int *pargc, char ***pargv, char ***penvp, int dowildcard , _startupinfo * startinfo ) { int ret; #ifdef ANSI_NEW_HANDLER #ifdef _MT /* set per-thread new handler for main thread */ _ptiddata ptd = _getptd(); ptd->_newh = startinfo->newh; #endif /* set global default per-thread new handler */ _defnewh = startinfo->newh; #endif /* ANSI_NEW_HANDLER */ /* set global new mode flag */ _newmode = startinfo->newmode; if ( dowildcard ) ret = __setargv(); /* do wildcard expansion after parsing args */ else ret = _setargv(); /* NO wildcard expansion; just parse args */ if (ret < 0) return ret; *pargc = __argc; *pargv = __argv; *penvp = _environ; return ret; } /*** *BOOL _CRTDLL_INIT(hDllHandle, dwReason, lpreserved) - C DLL initialization. * *Purpose: * This routine does the C runtime initialization. * *Entry: * *Exit: * *******************************************************************************/ BOOL WINAPI _CRTDLL_INIT( HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved ) { if ( dwReason == DLL_PROCESS_ATTACH ) { OSVERSIONINFOA *posvi; #if defined(_SYSCRT) void __declspec(dllimport) __stdcall RtlGetNtVersionNumbers(PDWORD, PDWORD, PDWORD); // The app may have set Win32VersionValue in the PE header to change // GetVersionEx. Ask NTDLL for the real version and bail if we don't match. DWORD NtMajorVersion; DWORD NtMinorVersion; RtlGetNtVersionNumbers(&NtMajorVersion, &NtMinorVersion, NULL); if ((NtMajorVersion != VER_PRODUCTMAJORVERSION) || (NtMinorVersion != VER_PRODUCTMINORVERSION)) return FALSE; #endif /* _SYSCRT */ /* * Dynamically allocate the OSVERSIONINFOA buffer, so we avoid * triggering the /GS buffer overrun detection. That can't be * used here, since the guard cookie isn't available until we * initialize it from here! */ posvi = (OSVERSIONINFOA *)_alloca(sizeof(OSVERSIONINFOA)); /* * Get the full Win32 version. */ posvi->dwOSVersionInfoSize = sizeof(OSVERSIONINFOA); if ( !GetVersionExA(posvi) ) return FALSE; _osplatform = posvi->dwPlatformId; _winmajor = posvi->dwMajorVersion; _winminor = posvi->dwMinorVersion; /* * The somewhat bizarre calculations of _osver and _winver are * required for backward compatibility (used to use GetVersion) */ _osver = (posvi->dwBuildNumber) & 0x07fff; if ( _osplatform != VER_PLATFORM_WIN32_NT ) _osver |= 0x08000; _winver = (_winmajor << 8) + _winminor; #ifdef _MT if ( !_heap_init(1) ) /* initialize heap */ #else if ( !_heap_init(0) ) /* initialize heap */ #endif /* * The heap cannot be initialized, return failure to the * loader. */ return FALSE; #ifdef _MT if(!_mtinit()) /* initialize multi-thread */ { /* * If the DLL load is going to fail, we must clean up * all resources that have already been allocated. */ _heap_term(); /* heap is now invalid! */ return FALSE; /* fail DLL load on failure */ } #endif /* _MT */ if (_ioinit() < 0) { /* inherit file info */ /* Clean up already-allocated resources */ #ifdef _MT /* free TLS index, call _mtdeletelocks() */ _mtterm(); #endif /* _MT */ _heap_term(); /* heap is now invalid! */ return FALSE; /* fail DLL load on failure */ } _aenvptr = (char *)__crtGetEnvironmentStringsA(); _acmdln = (char *)GetCommandLineA(); #ifndef _POSIX_ _wcmdln = (wchar_t *)__crtGetCommandLineW(); #endif /* _POSIX_ */ #ifdef _MBCS /* * Initialize multibyte ctype table. Always done since it is * needed for processing the environment strings. */ __initmbctable(); #endif /* * For CRT DLL, since we don't know the type (wide or multibyte) * of the program, we create only the multibyte type since that * is by far the most likely case. Wide environment will be created * on demand as usual. */ if (_setenvp() < 0 || /* get environ info */ _cinit() != 0) /* do C data initialize */ { _ioterm(); /* shut down lowio */ #ifdef _MT _mtterm(); /* free TLS index, call _mtdeletelocks() */ #endif /* _MT */ _heap_term(); /* heap is now invalid! */ return FALSE; /* fail DLL load on failure */ } /* * Increment flag indicating process attach notification * has been received. */ proc_attached++; } else if ( dwReason == DLL_PROCESS_DETACH ) { /* * if a client process is detaching, make sure minimal * runtime termination is performed and clean up our * 'locks' (i.e., delete critical sections). */ if ( proc_attached > 0 ) { proc_attached--; /* * Any basic clean-up done here may also need * to be done below if Process Attach is partly * processed and then a failure is encountered. */ if ( _C_Termination_Done == FALSE ) _cexit(); #ifdef _DEBUG /* Dump all memory leaks */ if (_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) & _CRTDBG_LEAK_CHECK_DF) { _CrtSetDumpClient(NULL); _CrtDumpMemoryLeaks(); } #endif /* * What remains is to clean up the system resources we have * used (handles, critical sections, memory,...,etc.). This * needs to be done if the whole process is NOT terminating. */ if ( lpreserved == NULL ) { /* * The process is NOT terminating so we must clean up... */ _ioterm(); #ifdef _MT /* free TLS index, call _mtdeletelocks() */ _mtterm(); #endif /* _MT */ /* This should be the last thing the C run-time does */ _heap_term(); /* heap is now invalid! */ } } else /* no prior process attach, just return */ return FALSE; } #ifdef _MT else if ( dwReason == DLL_THREAD_ATTACH ) { _ptiddata ptd; if ( ((ptd = _calloc_crt(1, sizeof(struct _tiddata))) != NULL)) { if (TlsSetValue(__tlsindex, (LPVOID)ptd) ) { /* * Initialize of per-thread data */ _initptd(ptd); ptd->_tid = GetCurrentThreadId(); ptd->_thandle = (uintptr_t)(-1); } else { _free_crt(ptd); return FALSE; } } else { return FALSE; } } else if ( dwReason == DLL_THREAD_DETACH ) { _freeptd(NULL); /* free up per-thread CRT data */ } #endif /* _MT */ return TRUE; } /*** *_amsg_exit(rterrnum) - Fast exit fatal errors * *Purpose: * Exit the program with error code of 255 and appropriate error * message. * *Entry: * int rterrnum - error message number (amsg_exit only). * *Exit: * Calls exit() (for integer divide-by-0) or _exit() indirectly * through _aexit_rtn [amsg_exit]. * For multi-thread: calls _exit() function * *Exceptions: * *******************************************************************************/ void __cdecl _amsg_exit ( int rterrnum ) { if ( (__error_mode == _OUT_TO_STDERR) || ((__error_mode == _OUT_TO_DEFAULT) && (__app_type == _CONSOLE_APP)) ) _FF_MSGBANNER(); /* write run-time error banner */ _NMSG_WRITE(rterrnum); /* write message */ _aexit_rtn(255); /* normally _exit(255) */ } #if defined(_M_IX86 ) /* * Functions to access user-visible, per-process variables */ /* * Macro to construct the name of the access function from the variable * name. */ #define AFNAME(var) __p_ ## var /* * Macro to construct the access function's return value from the variable * name. */ #define AFRET(var) &var /* *** *** Template *** _CRTIMP __cdecl AFNAME() (void) { return AFRET(); } *** *** *** */ #ifdef _DEBUG _CRTIMP long * AFNAME(_crtAssertBusy) (void) { return AFRET(_crtAssertBusy); } _CRTIMP long * AFNAME(_crtBreakAlloc) (void) { return AFRET(_crtBreakAlloc); } _CRTIMP int * AFNAME(_crtDbgFlag) (void) { return AFRET(_crtDbgFlag); } #endif /* _DEBUG */ _CRTIMP char ** __cdecl AFNAME(_acmdln) (void) { return AFRET(_acmdln); } _CRTIMP wchar_t ** __cdecl AFNAME(_wcmdln) (void) { return AFRET(_wcmdln); } _CRTIMP unsigned int * __cdecl AFNAME(_amblksiz) (void) { return AFRET(_amblksiz); } _CRTIMP int * __cdecl AFNAME(__argc) (void) { return AFRET(__argc); } _CRTIMP char *** __cdecl AFNAME(__argv) (void) { return AFRET(__argv); } _CRTIMP wchar_t *** __cdecl AFNAME(__wargv) (void) { return AFRET(__wargv); } _CRTIMP int * __cdecl AFNAME(_commode) (void) { return AFRET(_commode); } _CRTIMP int * __cdecl AFNAME(_daylight) (void) { return AFRET(_daylight); } _CRTIMP long * __cdecl AFNAME(_dstbias) (void) { return AFRET(_dstbias); } _CRTIMP char *** __cdecl AFNAME(_environ) (void) { return AFRET(_environ); } _CRTIMP wchar_t *** __cdecl AFNAME(_wenviron) (void) { return AFRET(_wenviron); } _CRTIMP int * __cdecl AFNAME(_fmode) (void) { return AFRET(_fmode); } _CRTIMP int * __cdecl AFNAME(_fileinfo) (void) { return AFRET(_fileinfo); } _CRTIMP char *** __cdecl AFNAME(__initenv) (void) { return AFRET(__initenv); } _CRTIMP wchar_t *** __cdecl AFNAME(__winitenv) (void) { return AFRET(__winitenv); } _CRTIMP FILE * AFNAME(_iob) (void) { return &_iob[0]; } _CRTIMP unsigned char * __cdecl AFNAME(_mbctype) (void) { return &_mbctype[0]; } _CRTIMP unsigned char * __cdecl AFNAME(_mbcasemap) (void) { return &_mbcasemap[0]; } _CRTIMP int * __cdecl AFNAME(__mb_cur_max) (void) { return AFRET(__mb_cur_max); } _CRTIMP unsigned int * __cdecl AFNAME(_osver) (void) { return AFRET(_osver); } _CRTIMP const unsigned short ** __cdecl AFNAME(_pctype) (void) { return AFRET(_pctype); } _CRTIMP const unsigned short ** __cdecl AFNAME(_pwctype) (void) { return AFRET(_pwctype); } _CRTIMP char ** __cdecl AFNAME(_pgmptr) (void) { return AFRET(_pgmptr); } _CRTIMP wchar_t ** __cdecl AFNAME(_wpgmptr) (void) { return AFRET(_wpgmptr); } _CRTIMP long * __cdecl AFNAME(_timezone) (void) { return AFRET(_timezone); } _CRTIMP char ** __cdecl AFNAME(_tzname) (void) { return &_tzname[0]; } _CRTIMP unsigned int * __cdecl AFNAME(_winmajor) (void) { return AFRET(_winmajor); } _CRTIMP unsigned int * __cdecl AFNAME(_winminor) (void) { return AFRET(_winminor); } _CRTIMP unsigned int * __cdecl AFNAME(_winver) (void) { return AFRET(_winver); } #endif /* _M_IX86 */ #endif /* CRTDLL */