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windows-nt/Source/XPSP1/NT/base/crts/crtw32/dllstuff/crtlib.c

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/***
*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 <cruntime.h>
#include <oscalls.h>
#include <dos.h>
#include <internal.h>
#include <malloc.h>
#include <mbctype.h>
#include <mtdll.h>
#include <process.h>
#include <rterr.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <awint.h>
#include <tchar.h>
#include <time.h>
#include <dbgint.h>
#ifdef _SYSCRT
#include <ntverp.h>
#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 <internal.h> */
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 */
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